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* [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers
@ 2019-08-19 16:31 Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 01/17] w1: add 1-wire master driver for IP block found in SGI ASICs Thomas Bogendoerfer
                   ` (17 more replies)
  0 siblings, 18 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

GI IOC3 ASIC includes support for ethernet, PS2 keyboard/mouse,
NIC (number in a can), GPIO and a byte  bus. By attaching a
SuperIO chip to it, it also supports serial lines and a parallel
port. The chip is used on a variety of SGI systems with different
configurations. This patchset moves code out of the network driver,
which doesn't belong there, into its new place a MFD driver and
specific platform drivers for the different subfunctions.

Changes in v5:
 - requested by Jakub I've splitted ioc3 ethernet driver changes into
   more steps to make the transition more visible; on the way there 
   I've "checkpatched" the driver and reduced code reorderings
 - dropped all uint16_t and uint32_t
 - added nvmem API extension to the documenation file
 - changed to use request_irq/free_irq in serio driver
 - removed wrong kfree() in serio error path

Changes in v4:
 - added w1 drivers to the series after merge in 5.3 failed because
   of no response from maintainer and other parts of this series
   won't work without that drivers
 - moved ip30 systemboard support to the ip30 series, which will
   deal with rtc oddity Lee found
 - converted to use devm_platform_ioremap_resource
 - use PLATFORM_DEVID_AUTO for serial, ethernet and serio in mfd driver
 - fixed reverse christmas order in ioc3-eth.c
 - formating issue found by Lee
 - re-worked irq request/free in serio driver to avoid crashes during
   probe/remove

Changes in v3:
 - use 1-wire subsystem for handling proms
 - pci-xtalk driver uses prom information to create PCI subsystem
   ids for use in MFD driver
 - changed MFD driver to only use static declared mfd_cells
 - added IP30 system board setup to MFD driver
 - mac address is now read from ioc3-eth driver with nvmem framework

Changes in v2:
 - fixed issue in ioc3kbd.c reported by Dmitry Torokhov
 - merged IP27 RTC removal and 8250 serial driver addition into
   main MFD patch to keep patches bisectable

Thomas Bogendoerfer (17):
  w1: add 1-wire master driver for IP block found in SGI ASICs
  w1: add DS2501, DS2502, DS2505 EPROM device driver
  nvmem: core: add nvmem_device_find
  MIPS: PCI: refactor ioc3 special handling
  MIPS: PCI: use information from 1-wire PROM for IOC3 detection
  MIPS: SGI-IP27: remove ioc3 ethernet init
  MIPS: SGI-IP27: restructure ioc3 register access
  net: sgi: ioc3-eth: remove checkpatch errors/warning
  net: sgi: ioc3-eth: use defines for constants dealing with desc rings
  net: sgi: ioc3-eth: rework skb rx handling
  net: sgi: ioc3-eth: no need to stop queue set_multicast_list
  net: sgi: ioc3-eth: use dma-direct for dma allocations
  net: sgi: ioc3-eth: use csum_fold
  net: sgi: ioc3-eth: Fix IPG settings
  mfd: ioc3: Add driver for SGI IOC3 chip
  MIPS: SGI-IP27: fix readb/writeb addressing
  Input: add IOC3 serio driver

 Documentation/driver-api/nvmem.rst            |    2 +
 arch/mips/include/asm/mach-ip27/mangle-port.h |    4 +-
 arch/mips/include/asm/pci/bridge.h            |    1 +
 arch/mips/include/asm/sn/ioc3.h               |  364 +++----
 arch/mips/pci/pci-xtalk-bridge.c              |  296 ++++--
 arch/mips/sgi-ip27/ip27-console.c             |    5 +-
 arch/mips/sgi-ip27/ip27-init.c                |   13 -
 arch/mips/sgi-ip27/ip27-timer.c               |   20 -
 arch/mips/sgi-ip27/ip27-xtalk.c               |   38 +-
 drivers/input/serio/Kconfig                   |   10 +
 drivers/input/serio/Makefile                  |    1 +
 drivers/input/serio/ioc3kbd.c                 |  160 +++
 drivers/mfd/Kconfig                           |   13 +
 drivers/mfd/Makefile                          |    1 +
 drivers/mfd/ioc3.c                            |  586 +++++++++++
 drivers/net/ethernet/sgi/Kconfig              |    4 +-
 drivers/net/ethernet/sgi/ioc3-eth.c           | 1405 +++++++++----------------
 drivers/nvmem/core.c                          |   62 +-
 drivers/rtc/rtc-m48t35.c                      |   11 +
 drivers/tty/serial/8250/8250_ioc3.c           |   98 ++
 drivers/tty/serial/8250/Kconfig               |   11 +
 drivers/tty/serial/8250/Makefile              |    1 +
 drivers/w1/masters/Kconfig                    |    9 +
 drivers/w1/masters/Makefile                   |    1 +
 drivers/w1/masters/sgi_w1.c                   |  130 +++
 drivers/w1/slaves/Kconfig                     |    6 +
 drivers/w1/slaves/Makefile                    |    1 +
 drivers/w1/slaves/w1_ds250x.c                 |  293 ++++++
 include/linux/nvmem-consumer.h                |    9 +
 include/linux/platform_data/sgi-w1.h          |   15 +
 include/linux/w1.h                            |    2 +
 31 files changed, 2266 insertions(+), 1306 deletions(-)
 create mode 100644 drivers/input/serio/ioc3kbd.c
 create mode 100644 drivers/mfd/ioc3.c
 create mode 100644 drivers/tty/serial/8250/8250_ioc3.c
 create mode 100644 drivers/w1/masters/sgi_w1.c
 create mode 100644 drivers/w1/slaves/w1_ds250x.c
 create mode 100644 include/linux/platform_data/sgi-w1.h

-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 01/17] w1: add 1-wire master driver for IP block found in SGI ASICs
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 02/17] w1: add DS2501, DS2502, DS2505 EPROM device driver Thomas Bogendoerfer
                   ` (16 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Starting with SGI Origin machines nearly every new SGI ASIC contains
an 1-Wire master. They are used for attaching One-Wire prom devices,
which contain information about part numbers, revision numbers,
serial number etc. and MAC addresses for ethernet interfaces.
This patch adds a master driver to support this IP block.
It also adds an extra field dev_id to struct w1_bus_master, which
could be in used in slave drivers for creating unique device names.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/w1/masters/Kconfig           |   9 +++
 drivers/w1/masters/Makefile          |   1 +
 drivers/w1/masters/sgi_w1.c          | 130 +++++++++++++++++++++++++++++++++++
 include/linux/platform_data/sgi-w1.h |  15 ++++
 include/linux/w1.h                   |   2 +
 5 files changed, 157 insertions(+)
 create mode 100644 drivers/w1/masters/sgi_w1.c
 create mode 100644 include/linux/platform_data/sgi-w1.h

diff --git a/drivers/w1/masters/Kconfig b/drivers/w1/masters/Kconfig
index 7ae260577901..24b9a8e05f64 100644
--- a/drivers/w1/masters/Kconfig
+++ b/drivers/w1/masters/Kconfig
@@ -65,5 +65,14 @@ config HDQ_MASTER_OMAP
 	  Say Y here if you want support for the 1-wire or HDQ Interface
 	  on an OMAP processor.
 
+config W1_MASTER_SGI
+	tristate "SGI ASIC driver"
+	help
+	  Say Y here if you want support for your 1-wire devices using
+	  SGI ASIC 1-Wire interface
+
+	  This support is also available as a module.  If so, the module
+	  will be called sgi_w1.
+
 endmenu
 
diff --git a/drivers/w1/masters/Makefile b/drivers/w1/masters/Makefile
index 18954cae4256..dae629b7ab49 100644
--- a/drivers/w1/masters/Makefile
+++ b/drivers/w1/masters/Makefile
@@ -11,3 +11,4 @@ obj-$(CONFIG_W1_MASTER_MXC)		+= mxc_w1.o
 obj-$(CONFIG_W1_MASTER_DS1WM)		+= ds1wm.o
 obj-$(CONFIG_W1_MASTER_GPIO)		+= w1-gpio.o
 obj-$(CONFIG_HDQ_MASTER_OMAP)		+= omap_hdq.o
+obj-$(CONFIG_W1_MASTER_SGI)		+= sgi_w1.o
diff --git a/drivers/w1/masters/sgi_w1.c b/drivers/w1/masters/sgi_w1.c
new file mode 100644
index 000000000000..1b2d96b945be
--- /dev/null
+++ b/drivers/w1/masters/sgi_w1.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sgi_w1.c - w1 master driver for one wire support in SGI ASICs
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/sgi-w1.h>
+
+#include <linux/w1.h>
+
+#define MCR_RD_DATA	BIT(0)
+#define MCR_DONE	BIT(1)
+
+#define MCR_PACK(pulse, sample) (((pulse) << 10) | ((sample) << 2))
+
+struct sgi_w1_device {
+	u32 __iomem *mcr;
+	struct w1_bus_master bus_master;
+	char dev_id[64];
+};
+
+static u8 sgi_w1_wait(u32 __iomem *mcr)
+{
+	u32 mcr_val;
+
+	do {
+		mcr_val = readl(mcr);
+	} while (!(mcr_val & MCR_DONE));
+
+	return (mcr_val & MCR_RD_DATA) ? 1 : 0;
+}
+
+/*
+ * this is the low level routine to
+ * reset the device on the One Wire interface
+ * on the hardware
+ */
+static u8 sgi_w1_reset_bus(void *data)
+{
+	struct sgi_w1_device *dev = data;
+	u8 ret;
+
+	writel(MCR_PACK(520, 65), dev->mcr);
+	ret = sgi_w1_wait(dev->mcr);
+	udelay(500); /* recovery time */
+	return ret;
+}
+
+/*
+ * this is the low level routine to read/write a bit on the One Wire
+ * interface on the hardware. It does write 0 if parameter bit is set
+ * to 0, otherwise a write 1/read.
+ */
+static u8 sgi_w1_touch_bit(void *data, u8 bit)
+{
+	struct sgi_w1_device *dev = data;
+	u8 ret;
+
+	if (bit)
+		writel(MCR_PACK(6, 13), dev->mcr);
+	else
+		writel(MCR_PACK(80, 30), dev->mcr);
+
+	ret = sgi_w1_wait(dev->mcr);
+	if (bit)
+		udelay(100); /* recovery */
+	return ret;
+}
+
+static int sgi_w1_probe(struct platform_device *pdev)
+{
+	struct sgi_w1_device *sdev;
+	struct sgi_w1_platform_data *pdata;
+	struct resource *res;
+
+	sdev = devm_kzalloc(&pdev->dev, sizeof(struct sgi_w1_device),
+			    GFP_KERNEL);
+	if (!sdev)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	sdev->mcr = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(sdev->mcr))
+		return PTR_ERR(sdev->mcr);
+
+	sdev->bus_master.data = sdev;
+	sdev->bus_master.reset_bus = sgi_w1_reset_bus;
+	sdev->bus_master.touch_bit = sgi_w1_touch_bit;
+
+	pdata = dev_get_platdata(&pdev->dev);
+	if (pdata) {
+		strlcpy(sdev->dev_id, pdata->dev_id, sizeof(sdev->dev_id));
+		sdev->bus_master.dev_id = sdev->dev_id;
+	}
+
+	platform_set_drvdata(pdev, sdev);
+
+	return w1_add_master_device(&sdev->bus_master);
+}
+
+/*
+ * disassociate the w1 device from the driver
+ */
+static int sgi_w1_remove(struct platform_device *pdev)
+{
+	struct sgi_w1_device *sdev = platform_get_drvdata(pdev);
+
+	w1_remove_master_device(&sdev->bus_master);
+
+	return 0;
+}
+
+static struct platform_driver sgi_w1_driver = {
+	.driver = {
+		.name = "sgi_w1",
+	},
+	.probe = sgi_w1_probe,
+	.remove = sgi_w1_remove,
+};
+module_platform_driver(sgi_w1_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Thomas Bogendoerfer");
+MODULE_DESCRIPTION("Driver for One-Wire IP in SGI ASICs");
diff --git a/include/linux/platform_data/sgi-w1.h b/include/linux/platform_data/sgi-w1.h
new file mode 100644
index 000000000000..fc6b92e0b942
--- /dev/null
+++ b/include/linux/platform_data/sgi-w1.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * SGI One-Wire (W1) IP
+ */
+
+#ifndef PLATFORM_DATA_SGI_W1_H
+#define PLATFORM_DATA_SGI_W1_H
+
+#include <asm/sn/types.h>
+
+struct sgi_w1_platform_data {
+	char dev_id[64];
+};
+
+#endif /* PLATFORM_DATA_SGI_W1_H */
diff --git a/include/linux/w1.h b/include/linux/w1.h
index e0b5156f78fd..89843e9f634c 100644
--- a/include/linux/w1.h
+++ b/include/linux/w1.h
@@ -150,6 +150,8 @@ struct w1_bus_master {
 
 	void		(*search)(void *, struct w1_master *,
 		u8, w1_slave_found_callback);
+
+	char		*dev_id;
 };
 
 /**
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 02/17] w1: add DS2501, DS2502, DS2505 EPROM device driver
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 01/17] w1: add 1-wire master driver for IP block found in SGI ASICs Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 03/17] nvmem: core: add nvmem_device_find Thomas Bogendoerfer
                   ` (15 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Add a 1-Wire slave driver to support DS250x EPROM deivces. This
slave driver attaches the devices to the NVMEM subsystem for
an easy in-kernel usage.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/w1/slaves/Kconfig     |   6 +
 drivers/w1/slaves/Makefile    |   1 +
 drivers/w1/slaves/w1_ds250x.c | 293 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 300 insertions(+)
 create mode 100644 drivers/w1/slaves/w1_ds250x.c

diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
index 37aaad26b373..ebed495b9e69 100644
--- a/drivers/w1/slaves/Kconfig
+++ b/drivers/w1/slaves/Kconfig
@@ -101,6 +101,12 @@ config W1_SLAVE_DS2438
 	  Say Y here if you want to use a 1-wire
 	  DS2438 Smart Battery Monitor device support
 
+config W1_SLAVE_DS250X
+	tristate "512b/1kb/16kb EPROM family support"
+	help
+	  Say Y here if you want to use a 1-wire
+	  512b/1kb/16kb EPROM family device (DS250x).
+
 config W1_SLAVE_DS2780
 	tristate "Dallas 2780 battery monitor chip"
 	help
diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile
index eab29f151413..8e9655eaa478 100644
--- a/drivers/w1/slaves/Makefile
+++ b/drivers/w1/slaves/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_W1_SLAVE_DS2431)	+= w1_ds2431.o
 obj-$(CONFIG_W1_SLAVE_DS2805)	+= w1_ds2805.o
 obj-$(CONFIG_W1_SLAVE_DS2433)	+= w1_ds2433.o
 obj-$(CONFIG_W1_SLAVE_DS2438)	+= w1_ds2438.o
+obj-$(CONFIG_W1_SLAVE_DS250X)	+= w1_ds250x.o
 obj-$(CONFIG_W1_SLAVE_DS2780)	+= w1_ds2780.o
 obj-$(CONFIG_W1_SLAVE_DS2781)	+= w1_ds2781.o
 obj-$(CONFIG_W1_SLAVE_DS28E04)	+= w1_ds28e04.o
diff --git a/drivers/w1/slaves/w1_ds250x.c b/drivers/w1/slaves/w1_ds250x.c
new file mode 100644
index 000000000000..78da3774bbbe
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds250x.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * w1_ds250x.c - w1 family 09/0b/89/91 (DS250x) driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/crc16.h>
+
+#include <linux/w1.h>
+#include <linux/nvmem-provider.h>
+
+#define W1_DS2501_UNW_FAMILY    0x91
+#define W1_DS2501_SIZE          64
+
+#define W1_DS2502_FAMILY        0x09
+#define W1_DS2502_UNW_FAMILY    0x89
+#define W1_DS2502_SIZE          128
+
+#define W1_DS2505_FAMILY	0x0b
+#define W1_DS2505_SIZE		2048
+
+#define W1_PAGE_SIZE		32
+
+#define W1_EXT_READ_MEMORY	0xA5
+#define W1_READ_DATA_CRC        0xC3
+
+#define OFF2PG(off)	((off) / W1_PAGE_SIZE)
+
+#define CRC16_INIT		0
+#define CRC16_VALID		0xb001
+
+struct w1_eprom_data {
+	size_t size;
+	int (*read)(struct w1_slave *sl, int pageno);
+	u8 eprom[W1_DS2505_SIZE];
+	DECLARE_BITMAP(page_present, W1_DS2505_SIZE / W1_PAGE_SIZE);
+	char nvmem_name[64];
+};
+
+static int w1_ds2502_read_page(struct w1_slave *sl, int pageno)
+{
+	struct w1_eprom_data *data = sl->family_data;
+	int pgoff = pageno * W1_PAGE_SIZE;
+	int ret = -EIO;
+	u8 buf[3];
+	u8 crc8;
+
+	if (test_bit(pageno, data->page_present))
+		return 0; /* page already present */
+
+	mutex_lock(&sl->master->bus_mutex);
+
+	if (w1_reset_select_slave(sl))
+		goto err;
+
+	buf[0] = W1_READ_DATA_CRC;
+	buf[1] = pgoff & 0xff;
+	buf[2] = pgoff >> 8;
+	w1_write_block(sl->master, buf, 3);
+
+	crc8 = w1_read_8(sl->master);
+	if (w1_calc_crc8(buf, 3) != crc8)
+		goto err;
+
+	w1_read_block(sl->master, &data->eprom[pgoff], W1_PAGE_SIZE);
+
+	crc8 = w1_read_8(sl->master);
+	if (w1_calc_crc8(&data->eprom[pgoff], W1_PAGE_SIZE) != crc8)
+		goto err;
+
+	set_bit(pageno, data->page_present); /* mark page present */
+	ret = 0;
+err:
+	mutex_unlock(&sl->master->bus_mutex);
+	return ret;
+}
+
+static int w1_ds2505_read_page(struct w1_slave *sl, int pageno)
+{
+	struct w1_eprom_data *data = sl->family_data;
+	int redir_retries = 16;
+	int pgoff, epoff;
+	int ret = -EIO;
+	u8 buf[6];
+	u8 redir;
+	u16 crc;
+
+	if (test_bit(pageno, data->page_present))
+		return 0; /* page already present */
+
+	epoff = pgoff = pageno * W1_PAGE_SIZE;
+	mutex_lock(&sl->master->bus_mutex);
+
+retry:
+	if (w1_reset_select_slave(sl))
+		goto err;
+
+	buf[0] = W1_EXT_READ_MEMORY;
+	buf[1] = pgoff & 0xff;
+	buf[2] = pgoff >> 8;
+	w1_write_block(sl->master, buf, 3);
+	w1_read_block(sl->master, buf + 3, 3); /* redir, crc16 */
+	redir = buf[3];
+	crc = crc16(CRC16_INIT, buf, 6);
+
+	if (crc != CRC16_VALID)
+		goto err;
+
+
+	if (redir != 0xff) {
+		redir_retries--;
+		if (redir_retries < 0)
+			goto err;
+
+		pgoff = (redir ^ 0xff) * W1_PAGE_SIZE;
+		goto retry;
+	}
+
+	w1_read_block(sl->master, &data->eprom[epoff], W1_PAGE_SIZE);
+	w1_read_block(sl->master, buf, 2); /* crc16 */
+	crc = crc16(CRC16_INIT, &data->eprom[epoff], W1_PAGE_SIZE);
+	crc = crc16(crc, buf, 2);
+
+	if (crc != CRC16_VALID)
+		goto err;
+
+	set_bit(pageno, data->page_present);
+	ret = 0;
+err:
+	mutex_unlock(&sl->master->bus_mutex);
+	return ret;
+}
+
+static int w1_nvmem_read(void *priv, unsigned int off, void *buf, size_t count)
+{
+	struct w1_slave *sl = priv;
+	struct w1_eprom_data *data = sl->family_data;
+	size_t eprom_size = data->size;
+	int ret;
+	int i;
+
+	if (off > eprom_size)
+		return -EINVAL;
+
+	if ((off + count) > eprom_size)
+		count = eprom_size - off;
+
+	i = OFF2PG(off);
+	do {
+		ret = data->read(sl, i++);
+		if (ret < 0)
+			return ret;
+	} while (i < OFF2PG(off + count));
+
+	memcpy(buf, &data->eprom[off], count);
+	return 0;
+}
+
+static int w1_eprom_add_slave(struct w1_slave *sl)
+{
+	struct w1_eprom_data *data;
+	struct nvmem_device *nvmem;
+	struct nvmem_config nvmem_cfg = {
+		.dev = &sl->dev,
+		.reg_read = w1_nvmem_read,
+		.type = NVMEM_TYPE_OTP,
+		.read_only = true,
+		.word_size = 1,
+		.priv = sl,
+		.id = -1
+	};
+
+	data = devm_kzalloc(&sl->dev, sizeof(struct w1_eprom_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	sl->family_data = data;
+	switch (sl->family->fid) {
+	case W1_DS2501_UNW_FAMILY:
+		data->size = W1_DS2501_SIZE;
+		data->read = w1_ds2502_read_page;
+		break;
+	case W1_DS2502_FAMILY:
+	case W1_DS2502_UNW_FAMILY:
+		data->size = W1_DS2502_SIZE;
+		data->read = w1_ds2502_read_page;
+		break;
+	case W1_DS2505_FAMILY:
+		data->size = W1_DS2505_SIZE;
+		data->read = w1_ds2505_read_page;
+		break;
+	}
+
+	if (sl->master->bus_master->dev_id)
+		snprintf(data->nvmem_name, sizeof(data->nvmem_name),
+			 "%s-%02x-%012llx",
+			 sl->master->bus_master->dev_id, sl->reg_num.family,
+			 (unsigned long long)sl->reg_num.id);
+	else
+		snprintf(data->nvmem_name, sizeof(data->nvmem_name),
+			 "%02x-%012llx",
+			 sl->reg_num.family,
+			 (unsigned long long)sl->reg_num.id);
+
+	nvmem_cfg.name = data->nvmem_name;
+	nvmem_cfg.size = data->size;
+
+	nvmem = devm_nvmem_register(&sl->dev, &nvmem_cfg);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
+
+	return 0;
+}
+
+static struct w1_family_ops w1_eprom_fops = {
+	.add_slave	= w1_eprom_add_slave,
+};
+
+static struct w1_family w1_family_09 = {
+	.fid = W1_DS2502_FAMILY,
+	.fops = &w1_eprom_fops,
+};
+
+static struct w1_family w1_family_0b = {
+	.fid = W1_DS2505_FAMILY,
+	.fops = &w1_eprom_fops,
+};
+
+static struct w1_family w1_family_89 = {
+	.fid = W1_DS2502_UNW_FAMILY,
+	.fops = &w1_eprom_fops,
+};
+
+static struct w1_family w1_family_91 = {
+	.fid = W1_DS2501_UNW_FAMILY,
+	.fops = &w1_eprom_fops,
+};
+
+static int __init w1_ds250x_init(void)
+{
+	int err;
+
+	err = w1_register_family(&w1_family_09);
+	if (err)
+		return err;
+
+	err = w1_register_family(&w1_family_0b);
+	if (err)
+		goto err_0b;
+
+	err = w1_register_family(&w1_family_89);
+	if (err)
+		goto err_89;
+
+	err = w1_register_family(&w1_family_91);
+	if (err)
+		goto err_91;
+
+	return 0;
+
+err_91:
+	w1_unregister_family(&w1_family_89);
+err_89:
+	w1_unregister_family(&w1_family_0b);
+err_0b:
+	w1_unregister_family(&w1_family_09);
+	return err;
+}
+
+static void __exit w1_ds250x_exit(void)
+{
+	w1_unregister_family(&w1_family_09);
+	w1_unregister_family(&w1_family_0b);
+	w1_unregister_family(&w1_family_89);
+	w1_unregister_family(&w1_family_91);
+}
+
+module_init(w1_ds250x_init);
+module_exit(w1_ds250x_exit);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfe@suse.de>");
+MODULE_DESCRIPTION("w1 family driver for DS250x Add Only Memory");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("w1-family-" __stringify(W1_DS2502_FAMILY));
+MODULE_ALIAS("w1-family-" __stringify(W1_DS2505_FAMILY));
+MODULE_ALIAS("w1-family-" __stringify(W1_DS2501_UNW_FAMILY));
+MODULE_ALIAS("w1-family-" __stringify(W1_DS2502_UNW_FAMILY));
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 03/17] nvmem: core: add nvmem_device_find
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 01/17] w1: add 1-wire master driver for IP block found in SGI ASICs Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 02/17] w1: add DS2501, DS2502, DS2505 EPROM device driver Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 04/17] MIPS: PCI: refactor ioc3 special handling Thomas Bogendoerfer
                   ` (14 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

nvmem_device_find provides a way to search for nvmem devices with
the help of a match function simlair to bus_find_device.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 Documentation/driver-api/nvmem.rst |  2 ++
 drivers/nvmem/core.c               | 62 ++++++++++++++++++++------------------
 include/linux/nvmem-consumer.h     |  9 ++++++
 3 files changed, 43 insertions(+), 30 deletions(-)

diff --git a/Documentation/driver-api/nvmem.rst b/Documentation/driver-api/nvmem.rst
index d9d958d5c824..287e86819640 100644
--- a/Documentation/driver-api/nvmem.rst
+++ b/Documentation/driver-api/nvmem.rst
@@ -129,6 +129,8 @@ To facilitate such consumers NVMEM framework provides below apis::
   struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
   struct nvmem_device *devm_nvmem_device_get(struct device *dev,
 					   const char *name);
+  struct nvmem_device *nvmem_device_find(void *data,
+			int (*match)(struct device *dev, const void *data));
   void nvmem_device_put(struct nvmem_device *nvmem);
   int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
 		      size_t bytes, void *buf);
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index ac5d945be88a..e591ba54758f 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -76,36 +76,18 @@ static struct bus_type nvmem_bus_type = {
 	.name		= "nvmem",
 };
 
+#if IS_ENABLED(CONFIG_OF)
 static int of_nvmem_match(struct device *dev, const void *nvmem_np)
 {
 	return dev->of_node == nvmem_np;
 }
+#endif
 
-static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
+static int nvmem_match_name(struct device *dev, const void *data)
 {
-	struct device *d;
-
-	if (!nvmem_np)
-		return NULL;
-
-	d = bus_find_device(&nvmem_bus_type, NULL, nvmem_np, of_nvmem_match);
-
-	if (!d)
-		return NULL;
+	const char *name = data;
 
-	return to_nvmem_device(d);
-}
-
-static struct nvmem_device *nvmem_find(const char *name)
-{
-	struct device *d;
-
-	d = bus_find_device_by_name(&nvmem_bus_type, NULL, name);
-
-	if (!d)
-		return NULL;
-
-	return to_nvmem_device(d);
+	return sysfs_streq(name, dev_name(dev));
 }
 
 static void nvmem_cell_drop(struct nvmem_cell *cell)
@@ -537,13 +519,16 @@ int devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem)
 }
 EXPORT_SYMBOL(devm_nvmem_unregister);
 
-static struct nvmem_device *__nvmem_device_get(struct device_node *np,
-					       const char *nvmem_name)
+static struct nvmem_device *__nvmem_device_get(void *data,
+			int (*match)(struct device *dev, const void *data))
 {
 	struct nvmem_device *nvmem = NULL;
+	struct device *dev;
 
 	mutex_lock(&nvmem_mutex);
-	nvmem = np ? of_nvmem_find(np) : nvmem_find(nvmem_name);
+	dev = bus_find_device(&nvmem_bus_type, NULL, data, match);
+	if (dev)
+		nvmem = to_nvmem_device(dev);
 	mutex_unlock(&nvmem_mutex);
 	if (!nvmem)
 		return ERR_PTR(-EPROBE_DEFER);
@@ -592,7 +577,7 @@ struct nvmem_device *of_nvmem_device_get(struct device_node *np, const char *id)
 	if (!nvmem_np)
 		return ERR_PTR(-ENOENT);
 
-	return __nvmem_device_get(nvmem_np, NULL);
+	return __nvmem_device_get(nvmem_np, of_nvmem_match);
 }
 EXPORT_SYMBOL_GPL(of_nvmem_device_get);
 #endif
@@ -618,10 +603,26 @@ struct nvmem_device *nvmem_device_get(struct device *dev, const char *dev_name)
 
 	}
 
-	return __nvmem_device_get(NULL, dev_name);
+	return __nvmem_device_get((void *)dev_name, nvmem_match_name);
 }
 EXPORT_SYMBOL_GPL(nvmem_device_get);
 
+/**
+ * nvmem_device_find() - Find nvmem device with matching function
+ *
+ * @data: Data to pass to match function
+ * @match: Callback function to check device
+ *
+ * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_device
+ * on success.
+ */
+struct nvmem_device *nvmem_device_find(void *data,
+			int (*match)(struct device *dev, const void *data))
+{
+	return __nvmem_device_get(data, match);
+}
+EXPORT_SYMBOL_GPL(nvmem_device_find);
+
 static int devm_nvmem_device_match(struct device *dev, void *res, void *data)
 {
 	struct nvmem_device **nvmem = res;
@@ -715,7 +716,8 @@ nvmem_cell_get_from_lookup(struct device *dev, const char *con_id)
 		if ((strcmp(lookup->dev_id, dev_id) == 0) &&
 		    (strcmp(lookup->con_id, con_id) == 0)) {
 			/* This is the right entry. */
-			nvmem = __nvmem_device_get(NULL, lookup->nvmem_name);
+			nvmem = __nvmem_device_get((void *)lookup->nvmem_name,
+						   nvmem_match_name);
 			if (IS_ERR(nvmem)) {
 				/* Provider may not be registered yet. */
 				cell = ERR_CAST(nvmem);
@@ -785,7 +787,7 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id)
 	if (!nvmem_np)
 		return ERR_PTR(-EINVAL);
 
-	nvmem = __nvmem_device_get(nvmem_np, NULL);
+	nvmem = __nvmem_device_get(nvmem_np, of_nvmem_match);
 	of_node_put(nvmem_np);
 	if (IS_ERR(nvmem))
 		return ERR_CAST(nvmem);
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 8f8be5b00060..02dc4aa992b2 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -89,6 +89,9 @@ void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries,
 int nvmem_register_notifier(struct notifier_block *nb);
 int nvmem_unregister_notifier(struct notifier_block *nb);
 
+struct nvmem_device *nvmem_device_find(void *data,
+			int (*match)(struct device *dev, const void *data));
+
 #else
 
 static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
@@ -204,6 +207,12 @@ static inline int nvmem_unregister_notifier(struct notifier_block *nb)
 	return -EOPNOTSUPP;
 }
 
+static inline struct nvmem_device *nvmem_device_find(void *data,
+			int (*match)(struct device *dev, const void *data))
+{
+	return NULL;
+}
+
 #endif /* CONFIG_NVMEM */
 
 #if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 04/17] MIPS: PCI: refactor ioc3 special handling
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (2 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 03/17] nvmem: core: add nvmem_device_find Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-09-03  9:10   ` Paul Burton
  2019-08-19 16:31 ` [PATCH v5 05/17] MIPS: PCI: use information from 1-wire PROM for IOC3 detection Thomas Bogendoerfer
                   ` (13 subsequent siblings)
  17 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Refactored code to only have one ioc3 special handling for read
access and one for write access.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 arch/mips/pci/pci-xtalk-bridge.c | 167 +++++++++++++++------------------------
 1 file changed, 62 insertions(+), 105 deletions(-)

diff --git a/arch/mips/pci/pci-xtalk-bridge.c b/arch/mips/pci/pci-xtalk-bridge.c
index bcf7f559789a..7b4d40354ee7 100644
--- a/arch/mips/pci/pci-xtalk-bridge.c
+++ b/arch/mips/pci/pci-xtalk-bridge.c
@@ -20,16 +20,50 @@
  * Most of the IOC3 PCI config register aren't present
  * we emulate what is needed for a normal PCI enumeration
  */
-static u32 emulate_ioc3_cfg(int where, int size)
+static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value)
 {
-	if (size == 1 && where == 0x3d)
-		return 0x01;
-	else if (size == 2 && where == 0x3c)
-		return 0x0100;
-	else if (size == 4 && where == 0x3c)
-		return 0x00000100;
+	u32 cf, shift, mask;
 
-	return 0;
+	switch (where & ~3) {
+	case 0x00 ... 0x10:
+	case 0x40 ... 0x44:
+		if (get_dbe(cf, (u32 *)addr))
+			return PCIBIOS_DEVICE_NOT_FOUND;
+		break;
+	case 0x3c:
+		/* emulate sane interrupt pin value */
+		cf = 0x00000100;
+		break;
+	default:
+		cf = 0;
+		break;
+	}
+	shift = (where & 3) << 3;
+	mask = 0xffffffffU >> ((4 - size) << 3);
+	*value = (cf >> shift) & mask;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int ioc3_cfg_wr(void *addr, int where, int size, u32 value)
+{
+	u32 cf, shift, mask, smask;
+
+	if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
+		return PCIBIOS_SUCCESSFUL;
+
+	if (get_dbe(cf, (u32 *)addr))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	shift = ((where & 3) << 3);
+	mask = (0xffffffffU >> ((4 - size) << 3));
+	smask = mask << shift;
+
+	cf = (cf & ~smask) | ((value & mask) << shift);
+	if (put_dbe(cf, (u32 *)addr))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	return PCIBIOS_SUCCESSFUL;
 }
 
 static void bridge_disable_swapping(struct pci_dev *dev)
@@ -64,7 +98,7 @@ static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn,
 	int slot = PCI_SLOT(devfn);
 	int fn = PCI_FUNC(devfn);
 	void *addr;
-	u32 cf, shift, mask;
+	u32 cf;
 	int res;
 
 	addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[PCI_VENDOR_ID];
@@ -75,8 +109,10 @@ static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn,
 	 * IOC3 is broken beyond belief ...  Don't even give the
 	 * generic PCI code a chance to look at it for real ...
 	 */
-	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
-		goto is_ioc3;
+	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) {
+		addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
+		return ioc3_cfg_rd(addr, where, size, value);
+	}
 
 	addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
 
@@ -88,26 +124,6 @@ static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn,
 		res = get_dbe(*value, (u32 *)addr);
 
 	return res ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
-
-is_ioc3:
-
-	/*
-	 * IOC3 special handling
-	 */
-	if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
-		*value = emulate_ioc3_cfg(where, size);
-		return PCIBIOS_SUCCESSFUL;
-	}
-
-	addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-	if (get_dbe(cf, (u32 *)addr))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	shift = ((where & 3) << 3);
-	mask = (0xffffffffU >> ((4 - size) << 3));
-	*value = (cf >> shift) & mask;
-
-	return PCIBIOS_SUCCESSFUL;
 }
 
 static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
@@ -119,7 +135,7 @@ static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
 	int slot = PCI_SLOT(devfn);
 	int fn = PCI_FUNC(devfn);
 	void *addr;
-	u32 cf, shift, mask;
+	u32 cf;
 	int res;
 
 	bridge_write(bc, b_pci_cfg, (busno << 16) | (slot << 11));
@@ -131,8 +147,10 @@ static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
 	 * IOC3 is broken beyond belief ...  Don't even give the
 	 * generic PCI code a chance to look at it for real ...
 	 */
-	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
-		goto is_ioc3;
+	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) {
+		addr = &bridge->b_type1_cfg.c[(fn << 8) | (where & ~3)];
+		return ioc3_cfg_rd(addr, where, size, value);
+	}
 
 	addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
 
@@ -144,26 +162,6 @@ static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
 		res = get_dbe(*value, (u32 *)addr);
 
 	return res ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
-
-is_ioc3:
-
-	/*
-	 * IOC3 special handling
-	 */
-	if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
-		*value = emulate_ioc3_cfg(where, size);
-		return PCIBIOS_SUCCESSFUL;
-	}
-
-	addr = &bridge->b_type1_cfg.c[(fn << 8) | where];
-	if (get_dbe(cf, (u32 *)addr))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	shift = ((where & 3) << 3);
-	mask = (0xffffffffU >> ((4 - size) << 3));
-	*value = (cf >> shift) & mask;
-
-	return PCIBIOS_SUCCESSFUL;
 }
 
 static int pci_read_config(struct pci_bus *bus, unsigned int devfn,
@@ -183,7 +181,7 @@ static int pci_conf0_write_config(struct pci_bus *bus, unsigned int devfn,
 	int slot = PCI_SLOT(devfn);
 	int fn = PCI_FUNC(devfn);
 	void *addr;
-	u32 cf, shift, mask, smask;
+	u32 cf;
 	int res;
 
 	addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[PCI_VENDOR_ID];
@@ -194,8 +192,10 @@ static int pci_conf0_write_config(struct pci_bus *bus, unsigned int devfn,
 	 * IOC3 is broken beyond belief ...  Don't even give the
 	 * generic PCI code a chance to look at it for real ...
 	 */
-	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
-		goto is_ioc3;
+	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) {
+		addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
+		return ioc3_cfg_wr(addr, where, size, value);
+	}
 
 	addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
 
@@ -210,29 +210,6 @@ static int pci_conf0_write_config(struct pci_bus *bus, unsigned int devfn,
 		return PCIBIOS_DEVICE_NOT_FOUND;
 
 	return PCIBIOS_SUCCESSFUL;
-
-is_ioc3:
-
-	/*
-	 * IOC3 special handling
-	 */
-	if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
-		return PCIBIOS_SUCCESSFUL;
-
-	addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
-	if (get_dbe(cf, (u32 *)addr))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	shift = ((where & 3) << 3);
-	mask = (0xffffffffU >> ((4 - size) << 3));
-	smask = mask << shift;
-
-	cf = (cf & ~smask) | ((value & mask) << shift);
-	if (put_dbe(cf, (u32 *)addr))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	return PCIBIOS_SUCCESSFUL;
 }
 
 static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
@@ -244,7 +221,7 @@ static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
 	int fn = PCI_FUNC(devfn);
 	int busno = bus->number;
 	void *addr;
-	u32 cf, shift, mask, smask;
+	u32 cf;
 	int res;
 
 	bridge_write(bc, b_pci_cfg, (busno << 16) | (slot << 11));
@@ -256,8 +233,10 @@ static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
 	 * IOC3 is broken beyond belief ...  Don't even give the
 	 * generic PCI code a chance to look at it for real ...
 	 */
-	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
-		goto is_ioc3;
+	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) {
+		addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
+		return ioc3_cfg_wr(addr, where, size, value);
+	}
 
 	addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
 
@@ -272,28 +251,6 @@ static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
 		return PCIBIOS_DEVICE_NOT_FOUND;
 
 	return PCIBIOS_SUCCESSFUL;
-
-is_ioc3:
-
-	/*
-	 * IOC3 special handling
-	 */
-	if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
-		return PCIBIOS_SUCCESSFUL;
-
-	addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-	if (get_dbe(cf, (u32 *)addr))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	shift = ((where & 3) << 3);
-	mask = (0xffffffffU >> ((4 - size) << 3));
-	smask = mask << shift;
-
-	cf = (cf & ~smask) | ((value & mask) << shift);
-	if (put_dbe(cf, (u32 *)addr))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	return PCIBIOS_SUCCESSFUL;
 }
 
 static int pci_write_config(struct pci_bus *bus, unsigned int devfn,
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 05/17] MIPS: PCI: use information from 1-wire PROM for IOC3 detection
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (3 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 04/17] MIPS: PCI: refactor ioc3 special handling Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 06/17] MIPS: SGI-IP27: remove ioc3 ethernet init Thomas Bogendoerfer
                   ` (12 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

IOC3 chips in SGI system are conntected to a bridge ASIC, which has
a 1-wire prom attached with part number information. This changeset
uses this information to create PCI subsystem information, which
the MFD driver uses for further platform device setup.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 arch/mips/include/asm/pci/bridge.h |   1 +
 arch/mips/include/asm/sn/ioc3.h    |   9 +++
 arch/mips/pci/pci-xtalk-bridge.c   | 135 ++++++++++++++++++++++++++++++++++++-
 arch/mips/sgi-ip27/ip27-xtalk.c    |  38 +++++++++--
 4 files changed, 175 insertions(+), 8 deletions(-)

diff --git a/arch/mips/include/asm/pci/bridge.h b/arch/mips/include/asm/pci/bridge.h
index a92cd30b48c9..3bc630ff9ad4 100644
--- a/arch/mips/include/asm/pci/bridge.h
+++ b/arch/mips/include/asm/pci/bridge.h
@@ -807,6 +807,7 @@ struct bridge_controller {
 	unsigned long		intr_addr;
 	struct irq_domain	*domain;
 	unsigned int		pci_int[8];
+	u32			ioc3_sid[8];
 	nasid_t			nasid;
 };
 
diff --git a/arch/mips/include/asm/sn/ioc3.h b/arch/mips/include/asm/sn/ioc3.h
index 25c8dccab51f..5022b0ab2074 100644
--- a/arch/mips/include/asm/sn/ioc3.h
+++ b/arch/mips/include/asm/sn/ioc3.h
@@ -661,4 +661,13 @@ typedef enum ioc3_subdevs_e {
 #define IOC3_INTA_SUBDEVS	IOC3_SDB_ETHER
 #define IOC3_INTB_SUBDEVS	(IOC3_SDB_GENERIC|IOC3_SDB_KBMS|IOC3_SDB_SERIAL|IOC3_SDB_ECPP|IOC3_SDB_RT)
 
+/* subsystem IDs supplied by card detection in pci-xtalk-bridge */
+#define	IOC3_SUBSYS_IP27_BASEIO6G	0xc300
+#define	IOC3_SUBSYS_IP27_MIO		0xc301
+#define	IOC3_SUBSYS_IP27_BASEIO		0xc302
+#define	IOC3_SUBSYS_IP29_SYSBOARD	0xc303
+#define	IOC3_SUBSYS_IP30_SYSBOARD	0xc304
+#define	IOC3_SUBSYS_MENET		0xc305
+#define	IOC3_SUBSYS_MENET4		0xc306
+
 #endif /* _IOC3_H */
diff --git a/arch/mips/pci/pci-xtalk-bridge.c b/arch/mips/pci/pci-xtalk-bridge.c
index 7b4d40354ee7..dcf6117a17c3 100644
--- a/arch/mips/pci/pci-xtalk-bridge.c
+++ b/arch/mips/pci/pci-xtalk-bridge.c
@@ -11,16 +11,22 @@
 #include <linux/dma-direct.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/xtalk-bridge.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/crc16.h>
 
 #include <asm/pci/bridge.h>
 #include <asm/paccess.h>
 #include <asm/sn/irq_alloc.h>
+#include <asm/sn/ioc3.h>
+
+#define CRC16_INIT	0
+#define CRC16_VALID	0xb001
 
 /*
  * Most of the IOC3 PCI config register aren't present
  * we emulate what is needed for a normal PCI enumeration
  */
-static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value)
+static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value, u32 sid)
 {
 	u32 cf, shift, mask;
 
@@ -30,6 +36,9 @@ static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value)
 		if (get_dbe(cf, (u32 *)addr))
 			return PCIBIOS_DEVICE_NOT_FOUND;
 		break;
+	case 0x2c:
+		cf = sid;
+		break;
 	case 0x3c:
 		/* emulate sane interrupt pin value */
 		cf = 0x00000100;
@@ -111,7 +120,8 @@ static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn,
 	 */
 	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) {
 		addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-		return ioc3_cfg_rd(addr, where, size, value);
+		return ioc3_cfg_rd(addr, where, size, value,
+				   bc->ioc3_sid[slot]);
 	}
 
 	addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
@@ -149,7 +159,8 @@ static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
 	 */
 	if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) {
 		addr = &bridge->b_type1_cfg.c[(fn << 8) | (where & ~3)];
-		return ioc3_cfg_rd(addr, where, size, value);
+		return ioc3_cfg_rd(addr, where, size, value,
+				   bc->ioc3_sid[slot]);
 	}
 
 	addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
@@ -426,6 +437,117 @@ static int bridge_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 	return irq;
 }
 
+#define IOC3_SID(sid)	(PCI_VENDOR_ID_SGI << 16 | (sid))
+
+static void bridge_setup_ip27_baseio6g(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO6G);
+	bc->ioc3_sid[6] = IOC3_SID(IOC3_SUBSYS_IP27_MIO);
+}
+
+static void bridge_setup_ip27_baseio(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO);
+}
+
+static void bridge_setup_ip29_baseio(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP29_SYSBOARD);
+}
+
+static void bridge_setup_ip30_sysboard(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP30_SYSBOARD);
+}
+
+static void bridge_setup_menet(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[0] = IOC3_SID(IOC3_SUBSYS_MENET);
+	bc->ioc3_sid[1] = IOC3_SID(IOC3_SUBSYS_MENET);
+	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_MENET);
+	bc->ioc3_sid[3] = IOC3_SID(IOC3_SUBSYS_MENET4);
+}
+
+#define BRIDGE_BOARD_SETUP(_partno, _setup)	\
+	{ .match = _partno, .setup = _setup }
+
+static const struct {
+	char *match;
+	void (*setup)(struct bridge_controller *bc);
+} bridge_ioc3_devid[] = {
+	BRIDGE_BOARD_SETUP("030-0734-", bridge_setup_ip27_baseio6g),
+	BRIDGE_BOARD_SETUP("030-0880-", bridge_setup_ip27_baseio6g),
+	BRIDGE_BOARD_SETUP("030-1023-", bridge_setup_ip27_baseio),
+	BRIDGE_BOARD_SETUP("030-1124-", bridge_setup_ip27_baseio),
+	BRIDGE_BOARD_SETUP("030-1025-", bridge_setup_ip29_baseio),
+	BRIDGE_BOARD_SETUP("030-1244-", bridge_setup_ip29_baseio),
+	BRIDGE_BOARD_SETUP("030-1389-", bridge_setup_ip29_baseio),
+	BRIDGE_BOARD_SETUP("030-0887-", bridge_setup_ip30_sysboard),
+	BRIDGE_BOARD_SETUP("030-1467-", bridge_setup_ip30_sysboard),
+	BRIDGE_BOARD_SETUP("030-0873-", bridge_setup_menet),
+};
+
+static void bridge_setup_board(struct bridge_controller *bc, char *partnum)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bridge_ioc3_devid); i++)
+		if (!strncmp(partnum, bridge_ioc3_devid[i].match,
+			     strlen(bridge_ioc3_devid[i].match))) {
+			bridge_ioc3_devid[i].setup(bc);
+		}
+}
+
+static int bridge_nvmem_match(struct device *dev, const void *data)
+{
+	const char *name = dev_name(dev);
+	const char *prefix = data;
+
+	if (strlen(name) < strlen(prefix))
+		return 0;
+
+	return memcmp(prefix, dev_name(dev), strlen(prefix)) == 0;
+}
+
+static int bridge_get_partnum(u64 baddr, char *partnum)
+{
+	struct nvmem_device *nvmem;
+	char prefix[24];
+	u8 prom[64];
+	int i, j;
+	int ret;
+
+	snprintf(prefix, sizeof(prefix), "bridge-%012llx-0b-", baddr);
+
+	nvmem = nvmem_device_find(prefix, bridge_nvmem_match);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
+
+	ret = nvmem_device_read(nvmem, 0, 64, prom);
+	nvmem_device_put(nvmem);
+
+	if (ret != 64)
+		return ret;
+
+	if (crc16(CRC16_INIT, prom, 32) != CRC16_VALID ||
+	    crc16(CRC16_INIT, prom + 32, 32) != CRC16_VALID)
+		return -EINVAL;
+
+	/* Assemble part number */
+	j = 0;
+	for (i = 0; i < 19; i++)
+		if (prom[i + 11] != ' ')
+			partnum[j++] = prom[i + 11];
+
+	for (i = 0; i < 6; i++)
+		if (prom[i + 32] != ' ')
+			partnum[j++] = prom[i + 32];
+
+	partnum[j] = 0;
+
+	return 0;
+}
+
 static int bridge_probe(struct platform_device *pdev)
 {
 	struct xtalk_bridge_platform_data *bd = dev_get_platdata(&pdev->dev);
@@ -434,9 +556,14 @@ static int bridge_probe(struct platform_device *pdev)
 	struct pci_host_bridge *host;
 	struct irq_domain *domain, *parent;
 	struct fwnode_handle *fn;
+	char partnum[26];
 	int slot;
 	int err;
 
+	/* get part number from one wire prom */
+	if (bridge_get_partnum(virt_to_phys((void *)bd->bridge_addr), partnum))
+		return -EPROBE_DEFER; /* not available yet */
+
 	parent = irq_get_default_host();
 	if (!parent)
 		return -ENODEV;
@@ -517,6 +644,8 @@ static int bridge_probe(struct platform_device *pdev)
 	}
 	bridge_read(bc, b_wid_tflush);	  /* wait until Bridge PIO complete */
 
+	bridge_setup_board(bc, partnum);
+
 	host->dev.parent = dev;
 	host->sysdata = bc;
 	host->busnr = 0;
diff --git a/arch/mips/sgi-ip27/ip27-xtalk.c b/arch/mips/sgi-ip27/ip27-xtalk.c
index 4a1f0b0c29e2..9b7524362a11 100644
--- a/arch/mips/sgi-ip27/ip27-xtalk.c
+++ b/arch/mips/sgi-ip27/ip27-xtalk.c
@@ -10,6 +10,7 @@
 #include <linux/kernel.h>
 #include <linux/smp.h>
 #include <linux/platform_device.h>
+#include <linux/platform_data/sgi-w1.h>
 #include <linux/platform_data/xtalk-bridge.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/types.h>
@@ -26,9 +27,35 @@
 static void bridge_platform_create(nasid_t nasid, int widget, int masterwid)
 {
 	struct xtalk_bridge_platform_data *bd;
+	struct sgi_w1_platform_data *wd;
 	struct platform_device *pdev;
+	struct resource w1_res;
 	unsigned long offset;
 
+	offset = NODE_OFFSET(nasid);
+
+	wd = kzalloc(sizeof(*wd), GFP_KERNEL);
+	if (!wd)
+		goto no_mem;
+
+	snprintf(wd->dev_id, sizeof(wd->dev_id), "bridge-%012lx",
+		 offset + (widget << SWIN_SIZE_BITS));
+
+	memset(&w1_res, 0, sizeof(w1_res));
+	w1_res.start = offset + (widget << SWIN_SIZE_BITS) +
+				offsetof(struct bridge_regs, b_nic);
+	w1_res.end = w1_res.start + 3;
+	w1_res.flags = IORESOURCE_MEM;
+
+	pdev = platform_device_alloc("sgi_w1", PLATFORM_DEVID_AUTO);
+	if (!pdev) {
+		kfree(wd);
+		goto no_mem;
+	}
+	platform_device_add_resources(pdev, &w1_res, 1);
+	platform_device_add_data(pdev, wd, sizeof(*wd));
+	platform_device_add(pdev);
+
 	bd = kzalloc(sizeof(*bd), GFP_KERNEL);
 	if (!bd)
 		goto no_mem;
@@ -38,7 +65,6 @@ static void bridge_platform_create(nasid_t nasid, int widget, int masterwid)
 		goto no_mem;
 	}
 
-	offset = NODE_OFFSET(nasid);
 
 	bd->bridge_addr = RAW_NODE_SWIN_BASE(nasid, widget);
 	bd->intr_addr	= BIT_ULL(47) + 0x01800000 + PI_INT_PEND_MOD;
@@ -46,14 +72,14 @@ static void bridge_platform_create(nasid_t nasid, int widget, int masterwid)
 	bd->masterwid	= masterwid;
 
 	bd->mem.name	= "Bridge PCI MEM";
-	bd->mem.start	= offset + (widget << SWIN_SIZE_BITS);
-	bd->mem.end	= bd->mem.start + SWIN_SIZE - 1;
+	bd->mem.start	= offset + (widget << SWIN_SIZE_BITS) + BRIDGE_DEVIO0;
+	bd->mem.end	= offset + (widget << SWIN_SIZE_BITS) + SWIN_SIZE - 1;
 	bd->mem.flags	= IORESOURCE_MEM;
 	bd->mem_offset	= offset;
 
 	bd->io.name	= "Bridge PCI IO";
-	bd->io.start	= offset + (widget << SWIN_SIZE_BITS);
-	bd->io.end	= bd->io.start + SWIN_SIZE - 1;
+	bd->io.start	= offset + (widget << SWIN_SIZE_BITS) + BRIDGE_DEVIO0;
+	bd->io.end	= offset + (widget << SWIN_SIZE_BITS) + SWIN_SIZE - 1;
 	bd->io.flags	= IORESOURCE_IO;
 	bd->io_offset	= offset;
 
@@ -81,6 +107,8 @@ static int probe_one_port(nasid_t nasid, int widget, int masterwid)
 		bridge_platform_create(nasid, widget, masterwid);
 		break;
 	default:
+		pr_info("xtalk:n%d/%d unknown widget (0x%x)\n",
+			nasid, widget, partnum);
 		break;
 	}
 
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 06/17] MIPS: SGI-IP27: remove ioc3 ethernet init
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (4 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 05/17] MIPS: PCI: use information from 1-wire PROM for IOC3 detection Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 07/17] MIPS: SGI-IP27: restructure ioc3 register access Thomas Bogendoerfer
                   ` (11 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Removed not needed disabling of ethernet interrupts in IP27 platform code.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 arch/mips/sgi-ip27/ip27-init.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
index 066b33f50bcc..59d5375c9021 100644
--- a/arch/mips/sgi-ip27/ip27-init.c
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -130,17 +130,6 @@ cnodeid_t get_compact_nodeid(void)
 	return NASID_TO_COMPACT_NODEID(get_nasid());
 }
 
-static inline void ioc3_eth_init(void)
-{
-	struct ioc3 *ioc3;
-	nasid_t nid;
-
-	nid = get_nasid();
-	ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
-
-	ioc3->eier = 0;
-}
-
 extern void ip27_reboot_setup(void);
 
 void __init plat_mem_setup(void)
@@ -182,8 +171,6 @@ void __init plat_mem_setup(void)
 		panic("Kernel compiled for N mode.");
 #endif
 
-	ioc3_eth_init();
-
 	ioport_resource.start = 0;
 	ioport_resource.end = ~0UL;
 	set_io_port_base(IO_BASE);
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 07/17] MIPS: SGI-IP27: restructure ioc3 register access
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (5 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 06/17] MIPS: SGI-IP27: remove ioc3 ethernet init Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 08/17] net: sgi: ioc3-eth: remove checkpatch errors/warning Thomas Bogendoerfer
                   ` (10 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Break up the big ioc3 register struct into functional pieces to
make use in sub-function drivers more straightforward. And while
doing that get rid of all volatile access by using readX/writeX.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 arch/mips/include/asm/sn/ioc3.h     | 359 +++++++++++++------------------
 arch/mips/sgi-ip27/ip27-console.c   |   5 +-
 drivers/net/ethernet/sgi/ioc3-eth.c | 418 ++++++++++++++++--------------------
 3 files changed, 334 insertions(+), 448 deletions(-)

diff --git a/arch/mips/include/asm/sn/ioc3.h b/arch/mips/include/asm/sn/ioc3.h
index 5022b0ab2074..8ed952d93252 100644
--- a/arch/mips/include/asm/sn/ioc3.h
+++ b/arch/mips/include/asm/sn/ioc3.h
@@ -3,169 +3,161 @@
  * Copyright (C) 1999, 2000 Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  */
-#ifndef _IOC3_H
-#define _IOC3_H
+#ifndef MIPS_SN_IOC3_H
+#define MIPS_SN_IOC3_H
 
 #include <linux/types.h>
 
+/* serial port register map */
+struct ioc3_serialregs {
+	u32	sscr;
+	u32	stpir;
+	u32	stcir;
+	u32	srpir;
+	u32	srcir;
+	u32	srtr;
+	u32	shadow;
+};
+
 /* SUPERIO uart register map */
-typedef volatile struct ioc3_uartregs {
+struct ioc3_uartregs {
 	union {
-		volatile u8	rbr;	/* read only, DLAB == 0 */
-		volatile u8	thr;	/* write only, DLAB == 0 */
-		volatile u8	dll;	/* DLAB == 1 */
-	} u1;
+		u8	iu_rbr;	/* read only, DLAB == 0 */
+		u8	iu_thr;	/* write only, DLAB == 0 */
+		u8	iu_dll;	/* DLAB == 1 */
+	};
 	union {
-		volatile u8	ier;	/* DLAB == 0 */
-		volatile u8	dlm;	/* DLAB == 1 */
-	} u2;
+		u8	iu_ier;	/* DLAB == 0 */
+		u8	iu_dlm;	/* DLAB == 1 */
+	};
 	union {
-		volatile u8	iir;	/* read only */
-		volatile u8	fcr;	/* write only */
-	} u3;
-	volatile u8	    iu_lcr;
-	volatile u8	    iu_mcr;
-	volatile u8	    iu_lsr;
-	volatile u8	    iu_msr;
-	volatile u8	    iu_scr;
-} ioc3_uregs_t;
-
-#define iu_rbr u1.rbr
-#define iu_thr u1.thr
-#define iu_dll u1.dll
-#define iu_ier u2.ier
-#define iu_dlm u2.dlm
-#define iu_iir u3.iir
-#define iu_fcr u3.fcr
+		u8	iu_iir;	/* read only */
+		u8	iu_fcr;	/* write only */
+	};
+	u8	iu_lcr;
+	u8	iu_mcr;
+	u8	iu_lsr;
+	u8	iu_msr;
+	u8	iu_scr;
+};
 
 struct ioc3_sioregs {
-	volatile u8		fill[0x141];	/* starts at 0x141 */
+	u8	fill[0x141];	/* starts at 0x141 */
 
-	volatile u8		uartc;
-	volatile u8		kbdcg;
+	u8	uartc;
+	u8	kbdcg;
 
-	volatile u8		fill0[0x150 - 0x142 - 1];
+	u8	fill0[0x150 - 0x142 - 1];
 
-	volatile u8		pp_data;
-	volatile u8		pp_dsr;
-	volatile u8		pp_dcr;
+	u8	pp_data;
+	u8	pp_dsr;
+	u8	pp_dcr;
 
-	volatile u8		fill1[0x158 - 0x152 - 1];
+	u8	fill1[0x158 - 0x152 - 1];
 
-	volatile u8		pp_fifa;
-	volatile u8		pp_cfgb;
-	volatile u8		pp_ecr;
+	u8	pp_fifa;
+	u8	pp_cfgb;
+	u8	pp_ecr;
 
-	volatile u8		fill2[0x168 - 0x15a - 1];
+	u8	fill2[0x168 - 0x15a - 1];
 
-	volatile u8		rtcad;
-	volatile u8		rtcdat;
+	u8	rtcad;
+	u8	rtcdat;
 
-	volatile u8		fill3[0x170 - 0x169 - 1];
+	u8	fill3[0x170 - 0x169 - 1];
 
 	struct ioc3_uartregs	uartb;	/* 0x20170  */
 	struct ioc3_uartregs	uarta;	/* 0x20178  */
 };
 
+struct ioc3_ethregs {
+	u32	emcr;		/* 0x000f0  */
+	u32	eisr;		/* 0x000f4  */
+	u32	eier;		/* 0x000f8  */
+	u32	ercsr;		/* 0x000fc  */
+	u32	erbr_h;		/* 0x00100  */
+	u32	erbr_l;		/* 0x00104  */
+	u32	erbar;		/* 0x00108  */
+	u32	ercir;		/* 0x0010c  */
+	u32	erpir;		/* 0x00110  */
+	u32	ertr;		/* 0x00114  */
+	u32	etcsr;		/* 0x00118  */
+	u32	ersr;		/* 0x0011c  */
+	u32	etcdc;		/* 0x00120  */
+	u32	ebir;		/* 0x00124  */
+	u32	etbr_h;		/* 0x00128  */
+	u32	etbr_l;		/* 0x0012c  */
+	u32	etcir;		/* 0x00130  */
+	u32	etpir;		/* 0x00134  */
+	u32	emar_h;		/* 0x00138  */
+	u32	emar_l;		/* 0x0013c  */
+	u32	ehar_h;		/* 0x00140  */
+	u32	ehar_l;		/* 0x00144  */
+	u32	micr;		/* 0x00148  */
+	u32	midr_r;		/* 0x0014c  */
+	u32	midr_w;		/* 0x00150  */
+};
+
+struct ioc3_serioregs {
+	u32	km_csr;		/* 0x0009c  */
+	u32	k_rd;		/* 0x000a0  */
+	u32	m_rd;		/* 0x000a4  */
+	u32	k_wd;		/* 0x000a8  */
+	u32	m_wd;		/* 0x000ac  */
+};
+
 /* Register layout of IOC3 in configuration space.  */
 struct ioc3 {
-	volatile u32	pad0[7];	/* 0x00000  */
-	volatile u32	sio_ir;		/* 0x0001c  */
-	volatile u32	sio_ies;	/* 0x00020  */
-	volatile u32	sio_iec;	/* 0x00024  */
-	volatile u32	sio_cr;		/* 0x00028  */
-	volatile u32	int_out;	/* 0x0002c  */
-	volatile u32	mcr;		/* 0x00030  */
+	/* PCI Config Space registers  */
+	u32	pci_id;		/* 0x00000  */
+	u32	pci_scr;	/* 0x00004  */
+	u32	pci_rev;	/* 0x00008  */
+	u32	pci_lat;	/* 0x0000c  */
+	u32	pci_addr;	/* 0x00010  */
+	u32	pci_err_addr_l;	/* 0x00014  */
+	u32	pci_err_addr_h;	/* 0x00018  */
+
+	u32	sio_ir;		/* 0x0001c  */
+	u32	sio_ies;	/* 0x00020  */
+	u32	sio_iec;	/* 0x00024  */
+	u32	sio_cr;		/* 0x00028  */
+	u32	int_out;	/* 0x0002c  */
+	u32	mcr;		/* 0x00030  */
 
 	/* General Purpose I/O registers  */
-	volatile u32	gpcr_s;		/* 0x00034  */
-	volatile u32	gpcr_c;		/* 0x00038  */
-	volatile u32	gpdr;		/* 0x0003c  */
-	volatile u32	gppr_0;		/* 0x00040  */
-	volatile u32	gppr_1;		/* 0x00044  */
-	volatile u32	gppr_2;		/* 0x00048  */
-	volatile u32	gppr_3;		/* 0x0004c  */
-	volatile u32	gppr_4;		/* 0x00050  */
-	volatile u32	gppr_5;		/* 0x00054  */
-	volatile u32	gppr_6;		/* 0x00058  */
-	volatile u32	gppr_7;		/* 0x0005c  */
-	volatile u32	gppr_8;		/* 0x00060  */
-	volatile u32	gppr_9;		/* 0x00064  */
-	volatile u32	gppr_10;	/* 0x00068  */
-	volatile u32	gppr_11;	/* 0x0006c  */
-	volatile u32	gppr_12;	/* 0x00070  */
-	volatile u32	gppr_13;	/* 0x00074  */
-	volatile u32	gppr_14;	/* 0x00078  */
-	volatile u32	gppr_15;	/* 0x0007c  */
+	u32	gpcr_s;		/* 0x00034  */
+	u32	gpcr_c;		/* 0x00038  */
+	u32	gpdr;		/* 0x0003c  */
+	u32	gppr[16];	/* 0x00040  */
 
 	/* Parallel Port Registers  */
-	volatile u32	ppbr_h_a;	/* 0x00080  */
-	volatile u32	ppbr_l_a;	/* 0x00084  */
-	volatile u32	ppcr_a;		/* 0x00088  */
-	volatile u32	ppcr;		/* 0x0008c  */
-	volatile u32	ppbr_h_b;	/* 0x00090  */
-	volatile u32	ppbr_l_b;	/* 0x00094  */
-	volatile u32	ppcr_b;		/* 0x00098  */
+	u32	ppbr_h_a;	/* 0x00080  */
+	u32	ppbr_l_a;	/* 0x00084  */
+	u32	ppcr_a;		/* 0x00088  */
+	u32	ppcr;		/* 0x0008c  */
+	u32	ppbr_h_b;	/* 0x00090  */
+	u32	ppbr_l_b;	/* 0x00094  */
+	u32	ppcr_b;		/* 0x00098  */
 
 	/* Keyboard and Mouse Registers	 */
-	volatile u32	km_csr;		/* 0x0009c  */
-	volatile u32	k_rd;		/* 0x000a0  */
-	volatile u32	m_rd;		/* 0x000a4  */
-	volatile u32	k_wd;		/* 0x000a8  */
-	volatile u32	m_wd;		/* 0x000ac  */
+	struct ioc3_serioregs	serio;
 
 	/* Serial Port Registers  */
-	volatile u32	sbbr_h;		/* 0x000b0  */
-	volatile u32	sbbr_l;		/* 0x000b4  */
-	volatile u32	sscr_a;		/* 0x000b8  */
-	volatile u32	stpir_a;	/* 0x000bc  */
-	volatile u32	stcir_a;	/* 0x000c0  */
-	volatile u32	srpir_a;	/* 0x000c4  */
-	volatile u32	srcir_a;	/* 0x000c8  */
-	volatile u32	srtr_a;		/* 0x000cc  */
-	volatile u32	shadow_a;	/* 0x000d0  */
-	volatile u32	sscr_b;		/* 0x000d4  */
-	volatile u32	stpir_b;	/* 0x000d8  */
-	volatile u32	stcir_b;	/* 0x000dc  */
-	volatile u32	srpir_b;	/* 0x000e0  */
-	volatile u32	srcir_b;	/* 0x000e4  */
-	volatile u32	srtr_b;		/* 0x000e8  */
-	volatile u32	shadow_b;	/* 0x000ec  */
-
-	/* Ethernet Registers  */
-	volatile u32	emcr;		/* 0x000f0  */
-	volatile u32	eisr;		/* 0x000f4  */
-	volatile u32	eier;		/* 0x000f8  */
-	volatile u32	ercsr;		/* 0x000fc  */
-	volatile u32	erbr_h;		/* 0x00100  */
-	volatile u32	erbr_l;		/* 0x00104  */
-	volatile u32	erbar;		/* 0x00108  */
-	volatile u32	ercir;		/* 0x0010c  */
-	volatile u32	erpir;		/* 0x00110  */
-	volatile u32	ertr;		/* 0x00114  */
-	volatile u32	etcsr;		/* 0x00118  */
-	volatile u32	ersr;		/* 0x0011c  */
-	volatile u32	etcdc;		/* 0x00120  */
-	volatile u32	ebir;		/* 0x00124  */
-	volatile u32	etbr_h;		/* 0x00128  */
-	volatile u32	etbr_l;		/* 0x0012c  */
-	volatile u32	etcir;		/* 0x00130  */
-	volatile u32	etpir;		/* 0x00134  */
-	volatile u32	emar_h;		/* 0x00138  */
-	volatile u32	emar_l;		/* 0x0013c  */
-	volatile u32	ehar_h;		/* 0x00140  */
-	volatile u32	ehar_l;		/* 0x00144  */
-	volatile u32	micr;		/* 0x00148  */
-	volatile u32	midr_r;		/* 0x0014c  */
-	volatile u32	midr_w;		/* 0x00150  */
-	volatile u32	pad1[(0x20000 - 0x00154) / 4];
+	u32	sbbr_h;		/* 0x000b0  */
+	u32	sbbr_l;		/* 0x000b4  */
+	struct ioc3_serialregs	port_a;
+	struct ioc3_serialregs	port_b;
+
+	/* Ethernet Registers */
+	struct ioc3_ethregs	eth;
+	u32	pad1[(0x20000 - 0x00154) / 4];
 
 	/* SuperIO Registers  XXX */
 	struct ioc3_sioregs	sregs;	/* 0x20000 */
-	volatile u32	pad2[(0x40000 - 0x20180) / 4];
+	u32	pad2[(0x40000 - 0x20180) / 4];
 
 	/* SSRAM Diagnostic Access */
-	volatile u32	ssram[(0x80000 - 0x40000) / 4];
+	u32	ssram[(0x80000 - 0x40000) / 4];
 
 	/* Bytebus device offsets
 	   0x80000 -   Access to the generic devices selected with   DEV0
@@ -178,6 +170,20 @@ struct ioc3 {
 	   0xFFFFF     bytebus DEV_SEL_3  */
 };
 
+
+#define PCI_LAT			0xc		/* Latency Timer */
+#define PCI_SCR_DROP_MODE_EN	0x00008000	/* drop pios on parity err */
+#define UARTA_BASE		0x178
+#define UARTB_BASE		0x170
+
+/*
+ * Bytebus device space
+ */
+#define IOC3_BYTEBUS_DEV0	0x80000L
+#define IOC3_BYTEBUS_DEV1	0xa0000L
+#define IOC3_BYTEBUS_DEV2	0xc0000L
+#define IOC3_BYTEBUS_DEV3	0xe0000L
+
 /*
  * Ethernet RX Buffer
  */
@@ -233,28 +239,20 @@ struct ioc3_etxd {
 #define ETXD_B2CNT_MASK		0x7ff00000
 #define ETXD_B2CNT_SHIFT	20
 
-/*
- * Bytebus device space
- */
-#define IOC3_BYTEBUS_DEV0	0x80000L
-#define IOC3_BYTEBUS_DEV1	0xa0000L
-#define IOC3_BYTEBUS_DEV2	0xc0000L
-#define IOC3_BYTEBUS_DEV3	0xe0000L
-
 /* ------------------------------------------------------------------------- */
 
 /* Superio Registers (PIO Access) */
 #define IOC3_SIO_BASE		0x20000
 #define IOC3_SIO_UARTC		(IOC3_SIO_BASE+0x141)	/* UART Config */
 #define IOC3_SIO_KBDCG		(IOC3_SIO_BASE+0x142)	/* KBD Config */
-#define IOC3_SIO_PP_BASE	(IOC3_SIO_BASE+PP_BASE)		/* Parallel Port */
+#define IOC3_SIO_PP_BASE	(IOC3_SIO_BASE+PP_BASE)	/* Parallel Port */
 #define IOC3_SIO_RTC_BASE	(IOC3_SIO_BASE+0x168)	/* Real Time Clock */
 #define IOC3_SIO_UB_BASE	(IOC3_SIO_BASE+UARTB_BASE)	/* UART B */
 #define IOC3_SIO_UA_BASE	(IOC3_SIO_BASE+UARTA_BASE)	/* UART A */
 
 /* SSRAM Diagnostic Access */
 #define IOC3_SSRAM	IOC3_RAM_OFF	/* base of SSRAM diagnostic access */
-#define IOC3_SSRAM_LEN	0x40000 /* 256kb (address space size, may not be fully populated) */
+#define IOC3_SSRAM_LEN	0x40000	/* 256kb (addrspc sz, may not be populated) */
 #define IOC3_SSRAM_DM	0x0000ffff	/* data mask */
 #define IOC3_SSRAM_PM	0x00010000	/* parity mask */
 
@@ -294,10 +292,10 @@ struct ioc3_etxd {
 					   SIO_IR to assert */
 #define KM_CSR_M_TO_EN	  0x00080000	/* KM_CSR_M_TO + KM_CSR_M_TO_EN = cause
 					   SIO_IR to assert */
-#define KM_CSR_K_CLAMP_ONE	0x00100000	/* Pull K_CLK low after rec. one char */
-#define KM_CSR_M_CLAMP_ONE	0x00200000	/* Pull M_CLK low after rec. one char */
-#define KM_CSR_K_CLAMP_THREE	0x00400000	/* Pull K_CLK low after rec. three chars */
-#define KM_CSR_M_CLAMP_THREE	0x00800000	/* Pull M_CLK low after rec. three char */
+#define KM_CSR_K_CLAMP_1  0x00100000	/* Pull K_CLK low aft recv 1 char */
+#define KM_CSR_M_CLAMP_1  0x00200000	/* Pull M_CLK low aft recv 1 char */
+#define KM_CSR_K_CLAMP_3  0x00400000	/* Pull K_CLK low aft recv 3 chars */
+#define KM_CSR_M_CLAMP_3  0x00800000	/* Pull M_CLK low aft recv 3 chars */
 
 /* bitmasks for IOC3_K_RD and IOC3_M_RD */
 #define KM_RD_DATA_2	0x000000ff	/* 3rd char recvd since last read */
@@ -440,10 +438,6 @@ struct ioc3_etxd {
 				 SIO_IR_PP_INTB | SIO_IR_PP_MEMERR)
 #define SIO_IR_RT		(SIO_IR_RT_INT | SIO_IR_GEN_INT1)
 
-/* macro to load pending interrupts */
-#define IOC3_PENDING_INTRS(mem) (PCI_INW(&((mem)->sio_ir)) & \
-				 PCI_INW(&((mem)->sio_ies_ro)))
-
 /* bitmasks for SIO_CR */
 #define SIO_CR_SIO_RESET	0x00000001	/* reset the SIO */
 #define SIO_CR_SER_A_BASE	0x000000fe	/* DMA poll addr port A */
@@ -500,10 +494,11 @@ struct ioc3_etxd {
 #define GPCR_UARTB_MODESEL	0x40	/* pin is output to port B mode sel */
 #define GPCR_UARTA_MODESEL	0x80	/* pin is output to port A mode sel */
 
-#define GPPR_PHY_RESET_PIN	5	/* GIO pin controlling phy reset */
-#define GPPR_UARTB_MODESEL_PIN	6	/* GIO pin controlling uart b mode select */
-#define GPPR_UARTA_MODESEL_PIN	7	/* GIO pin controlling uart a mode select */
+#define GPPR_PHY_RESET_PIN	5	/* GIO pin cntrlling phy reset */
+#define GPPR_UARTB_MODESEL_PIN	6	/* GIO pin cntrlling uart b mode sel */
+#define GPPR_UARTA_MODESEL_PIN	7	/* GIO pin cntrlling uart a mode sel */
 
+/* ethernet */
 #define EMCR_DUPLEX		0x00000001
 #define EMCR_PROMISC		0x00000002
 #define EMCR_PADEN		0x00000004
@@ -595,71 +590,9 @@ struct ioc3_etxd {
 
 #define MIDR_DATA_MASK		0x0000ffff
 
-#define ERXBUF_IPCKSUM_MASK	0x0000ffff
-#define ERXBUF_BYTECNT_MASK	0x07ff0000
-#define ERXBUF_BYTECNT_SHIFT	16
-#define ERXBUF_V		0x80000000
-
-#define ERXBUF_CRCERR		0x00000001	/* aka RSV15 */
-#define ERXBUF_FRAMERR		0x00000002	/* aka RSV14 */
-#define ERXBUF_CODERR		0x00000004	/* aka RSV13 */
-#define ERXBUF_INVPREAMB	0x00000008	/* aka RSV18 */
-#define ERXBUF_LOLEN		0x00007000	/* aka RSV2_0 */
-#define ERXBUF_HILEN		0x03ff0000	/* aka RSV12_3 */
-#define ERXBUF_MULTICAST	0x04000000	/* aka RSV16 */
-#define ERXBUF_BROADCAST	0x08000000	/* aka RSV17 */
-#define ERXBUF_LONGEVENT	0x10000000	/* aka RSV19 */
-#define ERXBUF_BADPKT		0x20000000	/* aka RSV20 */
-#define ERXBUF_GOODPKT		0x40000000	/* aka RSV21 */
-#define ERXBUF_CARRIER		0x80000000	/* aka RSV22 */
-
-#define ETXD_BYTECNT_MASK	0x000007ff	/* total byte count */
-#define ETXD_INTWHENDONE	0x00001000	/* intr when done */
-#define ETXD_D0V		0x00010000	/* data 0 valid */
-#define ETXD_B1V		0x00020000	/* buf 1 valid */
-#define ETXD_B2V		0x00040000	/* buf 2 valid */
-#define ETXD_DOCHECKSUM		0x00080000	/* insert ip cksum */
-#define ETXD_CHKOFF_MASK	0x07f00000	/* cksum byte offset */
-#define ETXD_CHKOFF_SHIFT	20
-
-#define ETXD_D0CNT_MASK		0x0000007f
-#define ETXD_B1CNT_MASK		0x0007ff00
-#define ETXD_B1CNT_SHIFT	8
-#define ETXD_B2CNT_MASK		0x7ff00000
-#define ETXD_B2CNT_SHIFT	20
-
-typedef enum ioc3_subdevs_e {
-    ioc3_subdev_ether,
-    ioc3_subdev_generic,
-    ioc3_subdev_nic,
-    ioc3_subdev_kbms,
-    ioc3_subdev_ttya,
-    ioc3_subdev_ttyb,
-    ioc3_subdev_ecpp,
-    ioc3_subdev_rt,
-    ioc3_nsubdevs
-} ioc3_subdev_t;
-
-/* subdevice disable bits,
- * from the standard INFO_LBL_SUBDEVS
- */
-#define IOC3_SDB_ETHER		(1<<ioc3_subdev_ether)
-#define IOC3_SDB_GENERIC	(1<<ioc3_subdev_generic)
-#define IOC3_SDB_NIC		(1<<ioc3_subdev_nic)
-#define IOC3_SDB_KBMS		(1<<ioc3_subdev_kbms)
-#define IOC3_SDB_TTYA		(1<<ioc3_subdev_ttya)
-#define IOC3_SDB_TTYB		(1<<ioc3_subdev_ttyb)
-#define IOC3_SDB_ECPP		(1<<ioc3_subdev_ecpp)
-#define IOC3_SDB_RT		(1<<ioc3_subdev_rt)
-
-#define IOC3_ALL_SUBDEVS	((1<<ioc3_nsubdevs)-1)
-
-#define IOC3_SDB_SERIAL		(IOC3_SDB_TTYA|IOC3_SDB_TTYB)
-
-#define IOC3_STD_SUBDEVS	IOC3_ALL_SUBDEVS
-
-#define IOC3_INTA_SUBDEVS	IOC3_SDB_ETHER
-#define IOC3_INTB_SUBDEVS	(IOC3_SDB_GENERIC|IOC3_SDB_KBMS|IOC3_SDB_SERIAL|IOC3_SDB_ECPP|IOC3_SDB_RT)
+#if defined(CONFIG_SGI_IP27) || defined(CONFIG_SGI_IP30)
+extern int bridge_alloc_irq(struct pci_dev *dev);
+#endif
 
 /* subsystem IDs supplied by card detection in pci-xtalk-bridge */
 #define	IOC3_SUBSYS_IP27_BASEIO6G	0xc300
@@ -670,4 +603,4 @@ typedef enum ioc3_subdevs_e {
 #define	IOC3_SUBSYS_MENET		0xc305
 #define	IOC3_SUBSYS_MENET4		0xc306
 
-#endif /* _IOC3_H */
+#endif /* MIPS_SN_IOC3_H */
diff --git a/arch/mips/sgi-ip27/ip27-console.c b/arch/mips/sgi-ip27/ip27-console.c
index 6bdb48d41276..5886bee89d06 100644
--- a/arch/mips/sgi-ip27/ip27-console.c
+++ b/arch/mips/sgi-ip27/ip27-console.c
@@ -35,6 +35,7 @@ void prom_putchar(char c)
 {
 	struct ioc3_uartregs *uart = console_uart();
 
-	while ((uart->iu_lsr & 0x20) == 0);
-	uart->iu_thr = c;
+	while ((readb(&uart->iu_lsr) & 0x20) == 0)
+		;
+	writeb(c, &uart->iu_thr);
 }
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 358e66b81926..713d2472cb97 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -76,7 +76,9 @@
 
 /* Private per NIC data of the driver.  */
 struct ioc3_private {
-	struct ioc3 *regs;
+	struct ioc3_ethregs *regs;
+	struct ioc3 *all_regs;
+	u32 *ssram;
 	unsigned long *rxr;		/* pointer to receiver ring */
 	struct ioc3_etxd *txr;
 	struct sk_buff *rx_skbs[512];
@@ -156,128 +158,67 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
 
 #define IOC3_SIZE 0x100000
 
-/*
- * IOC3 is a big endian device
- *
- * Unorthodox but makes the users of these macros more readable - the pointer
- * to the IOC3's memory mapped registers is expected as struct ioc3 * ioc3
- * in the environment.
- */
-#define ioc3_r_mcr()		be32_to_cpu(ioc3->mcr)
-#define ioc3_w_mcr(v)		do { ioc3->mcr = cpu_to_be32(v); } while (0)
-#define ioc3_w_gpcr_s(v)	do { ioc3->gpcr_s = cpu_to_be32(v); } while (0)
-#define ioc3_r_emcr()		be32_to_cpu(ioc3->emcr)
-#define ioc3_w_emcr(v)		do { ioc3->emcr = cpu_to_be32(v); } while (0)
-#define ioc3_r_eisr()		be32_to_cpu(ioc3->eisr)
-#define ioc3_w_eisr(v)		do { ioc3->eisr = cpu_to_be32(v); } while (0)
-#define ioc3_r_eier()		be32_to_cpu(ioc3->eier)
-#define ioc3_w_eier(v)		do { ioc3->eier = cpu_to_be32(v); } while (0)
-#define ioc3_r_ercsr()		be32_to_cpu(ioc3->ercsr)
-#define ioc3_w_ercsr(v)		do { ioc3->ercsr = cpu_to_be32(v); } while (0)
-#define ioc3_r_erbr_h()		be32_to_cpu(ioc3->erbr_h)
-#define ioc3_w_erbr_h(v)	do { ioc3->erbr_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_erbr_l()		be32_to_cpu(ioc3->erbr_l)
-#define ioc3_w_erbr_l(v)	do { ioc3->erbr_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_erbar()		be32_to_cpu(ioc3->erbar)
-#define ioc3_w_erbar(v)		do { ioc3->erbar = cpu_to_be32(v); } while (0)
-#define ioc3_r_ercir()		be32_to_cpu(ioc3->ercir)
-#define ioc3_w_ercir(v)		do { ioc3->ercir = cpu_to_be32(v); } while (0)
-#define ioc3_r_erpir()		be32_to_cpu(ioc3->erpir)
-#define ioc3_w_erpir(v)		do { ioc3->erpir = cpu_to_be32(v); } while (0)
-#define ioc3_r_ertr()		be32_to_cpu(ioc3->ertr)
-#define ioc3_w_ertr(v)		do { ioc3->ertr = cpu_to_be32(v); } while (0)
-#define ioc3_r_etcsr()		be32_to_cpu(ioc3->etcsr)
-#define ioc3_w_etcsr(v)		do { ioc3->etcsr = cpu_to_be32(v); } while (0)
-#define ioc3_r_ersr()		be32_to_cpu(ioc3->ersr)
-#define ioc3_w_ersr(v)		do { ioc3->ersr = cpu_to_be32(v); } while (0)
-#define ioc3_r_etcdc()		be32_to_cpu(ioc3->etcdc)
-#define ioc3_w_etcdc(v)		do { ioc3->etcdc = cpu_to_be32(v); } while (0)
-#define ioc3_r_ebir()		be32_to_cpu(ioc3->ebir)
-#define ioc3_w_ebir(v)		do { ioc3->ebir = cpu_to_be32(v); } while (0)
-#define ioc3_r_etbr_h()		be32_to_cpu(ioc3->etbr_h)
-#define ioc3_w_etbr_h(v)	do { ioc3->etbr_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_etbr_l()		be32_to_cpu(ioc3->etbr_l)
-#define ioc3_w_etbr_l(v)	do { ioc3->etbr_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_etcir()		be32_to_cpu(ioc3->etcir)
-#define ioc3_w_etcir(v)		do { ioc3->etcir = cpu_to_be32(v); } while (0)
-#define ioc3_r_etpir()		be32_to_cpu(ioc3->etpir)
-#define ioc3_w_etpir(v)		do { ioc3->etpir = cpu_to_be32(v); } while (0)
-#define ioc3_r_emar_h()		be32_to_cpu(ioc3->emar_h)
-#define ioc3_w_emar_h(v)	do { ioc3->emar_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_emar_l()		be32_to_cpu(ioc3->emar_l)
-#define ioc3_w_emar_l(v)	do { ioc3->emar_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_ehar_h()		be32_to_cpu(ioc3->ehar_h)
-#define ioc3_w_ehar_h(v)	do { ioc3->ehar_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_ehar_l()		be32_to_cpu(ioc3->ehar_l)
-#define ioc3_w_ehar_l(v)	do { ioc3->ehar_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_micr()		be32_to_cpu(ioc3->micr)
-#define ioc3_w_micr(v)		do { ioc3->micr = cpu_to_be32(v); } while (0)
-#define ioc3_r_midr_r()		be32_to_cpu(ioc3->midr_r)
-#define ioc3_w_midr_r(v)	do { ioc3->midr_r = cpu_to_be32(v); } while (0)
-#define ioc3_r_midr_w()		be32_to_cpu(ioc3->midr_w)
-#define ioc3_w_midr_w(v)	do { ioc3->midr_w = cpu_to_be32(v); } while (0)
-
 static inline u32 mcr_pack(u32 pulse, u32 sample)
 {
 	return (pulse << 10) | (sample << 2);
 }
 
-static int nic_wait(struct ioc3 *ioc3)
+static int nic_wait(u32 __iomem *mcr)
 {
-	u32 mcr;
+	u32 m;
 
-        do {
-                mcr = ioc3_r_mcr();
-        } while (!(mcr & 2));
+	do {
+		m = readl(mcr);
+	} while (!(m & 2));
 
-        return mcr & 1;
+	return m & 1;
 }
 
-static int nic_reset(struct ioc3 *ioc3)
+static int nic_reset(u32 __iomem *mcr)
 {
         int presence;
 
-	ioc3_w_mcr(mcr_pack(500, 65));
-	presence = nic_wait(ioc3);
+	writel(mcr_pack(500, 65), mcr);
+	presence = nic_wait(mcr);
 
-	ioc3_w_mcr(mcr_pack(0, 500));
-	nic_wait(ioc3);
+	writel(mcr_pack(0, 500), mcr);
+	nic_wait(mcr);
 
         return presence;
 }
 
-static inline int nic_read_bit(struct ioc3 *ioc3)
+static inline int nic_read_bit(u32 __iomem *mcr)
 {
 	int result;
 
-	ioc3_w_mcr(mcr_pack(6, 13));
-	result = nic_wait(ioc3);
-	ioc3_w_mcr(mcr_pack(0, 100));
-	nic_wait(ioc3);
+	writel(mcr_pack(6, 13), mcr);
+	result = nic_wait(mcr);
+	writel(mcr_pack(0, 100), mcr);
+	nic_wait(mcr);
 
 	return result;
 }
 
-static inline void nic_write_bit(struct ioc3 *ioc3, int bit)
+static inline void nic_write_bit(u32 __iomem *mcr, int bit)
 {
 	if (bit)
-		ioc3_w_mcr(mcr_pack(6, 110));
+		writel(mcr_pack(6, 110), mcr);
 	else
-		ioc3_w_mcr(mcr_pack(80, 30));
+		writel(mcr_pack(80, 30), mcr);
 
-	nic_wait(ioc3);
+	nic_wait(mcr);
 }
 
 /*
  * Read a byte from an iButton device
  */
-static u32 nic_read_byte(struct ioc3 *ioc3)
+static u32 nic_read_byte(u32 __iomem *mcr)
 {
 	u32 result = 0;
 	int i;
 
 	for (i = 0; i < 8; i++)
-		result = (result >> 1) | (nic_read_bit(ioc3) << 7);
+		result = (result >> 1) | (nic_read_bit(mcr) << 7);
 
 	return result;
 }
@@ -285,7 +226,7 @@ static u32 nic_read_byte(struct ioc3 *ioc3)
 /*
  * Write a byte to an iButton device
  */
-static void nic_write_byte(struct ioc3 *ioc3, int byte)
+static void nic_write_byte(u32 __iomem *mcr, int byte)
 {
 	int i, bit;
 
@@ -293,23 +234,23 @@ static void nic_write_byte(struct ioc3 *ioc3, int byte)
 		bit = byte & 1;
 		byte >>= 1;
 
-		nic_write_bit(ioc3, bit);
+		nic_write_bit(mcr, bit);
 	}
 }
 
-static u64 nic_find(struct ioc3 *ioc3, int *last)
+static u64 nic_find(u32 __iomem *mcr, int *last)
 {
 	int a, b, index, disc;
 	u64 address = 0;
 
-	nic_reset(ioc3);
+	nic_reset(mcr);
 	/* Search ROM.  */
-	nic_write_byte(ioc3, 0xf0);
+	nic_write_byte(mcr, 0xf0);
 
 	/* Algorithm from ``Book of iButton Standards''.  */
 	for (index = 0, disc = 0; index < 64; index++) {
-		a = nic_read_bit(ioc3);
-		b = nic_read_bit(ioc3);
+		a = nic_read_bit(mcr);
+		b = nic_read_bit(mcr);
 
 		if (a && b) {
 			printk("NIC search failed (not fatal).\n");
@@ -325,14 +266,14 @@ static u64 nic_find(struct ioc3 *ioc3, int *last)
 				disc = index;
 			} else if ((address & (1UL << index)) == 0)
 				disc = index;
-			nic_write_bit(ioc3, address & (1UL << index));
+			nic_write_bit(mcr, address & (1UL << index));
 			continue;
 		} else {
 			if (a)
 				address |= 1UL << index;
 			else
 				address &= ~(1UL << index);
-			nic_write_bit(ioc3, a);
+			nic_write_bit(mcr, a);
 			continue;
 		}
 	}
@@ -342,7 +283,7 @@ static u64 nic_find(struct ioc3 *ioc3, int *last)
 	return address;
 }
 
-static int nic_init(struct ioc3 *ioc3)
+static int nic_init(u32 __iomem *mcr)
 {
 	const char *unknown = "unknown";
 	const char *type = unknown;
@@ -352,7 +293,7 @@ static int nic_init(struct ioc3 *ioc3)
 
 	while (1) {
 		u64 reg;
-		reg = nic_find(ioc3, &save);
+		reg = nic_find(mcr, &save);
 
 		switch (reg & 0xff) {
 		case 0x91:
@@ -366,12 +307,12 @@ static int nic_init(struct ioc3 *ioc3)
 			continue;
 		}
 
-		nic_reset(ioc3);
+		nic_reset(mcr);
 
 		/* Match ROM.  */
-		nic_write_byte(ioc3, 0x55);
+		nic_write_byte(mcr, 0x55);
 		for (i = 0; i < 8; i++)
-			nic_write_byte(ioc3, (reg >> (i << 3)) & 0xff);
+			nic_write_byte(mcr, (reg >> (i << 3)) & 0xff);
 
 		reg >>= 8; /* Shift out type.  */
 		for (i = 0; i < 6; i++) {
@@ -396,15 +337,15 @@ static int nic_init(struct ioc3 *ioc3)
  */
 static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
 {
-	struct ioc3 *ioc3 = ip->regs;
-	u8 nic[14];
+	u32 __iomem *mcr = &ip->all_regs->mcr;
 	int tries = 2; /* There may be some problem with the battery?  */
+	u8 nic[14];
 	int i;
 
-	ioc3_w_gpcr_s(1 << 21);
+	writel(1 << 21, &ip->all_regs->gpcr_s);
 
 	while (tries--) {
-		if (!nic_init(ioc3))
+		if (!nic_init(mcr))
 			break;
 		udelay(500);
 	}
@@ -415,12 +356,12 @@ static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
 	}
 
 	/* Read Memory.  */
-	nic_write_byte(ioc3, 0xf0);
-	nic_write_byte(ioc3, 0x00);
-	nic_write_byte(ioc3, 0x00);
+	nic_write_byte(mcr, 0xf0);
+	nic_write_byte(mcr, 0x00);
+	nic_write_byte(mcr, 0x00);
 
 	for (i = 13; i >= 0; i--)
-		nic[i] = nic_read_byte(ioc3);
+		nic[i] = nic_read_byte(mcr);
 
 	for (i = 2; i < 8; i++)
 		ip->dev->dev_addr[i - 2] = nic[i];
@@ -441,11 +382,15 @@ static void ioc3_get_eaddr(struct ioc3_private *ip)
 static void __ioc3_set_mac_address(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
 
-	ioc3_w_emar_h((dev->dev_addr[5] <<  8) | dev->dev_addr[4]);
-	ioc3_w_emar_l((dev->dev_addr[3] << 24) | (dev->dev_addr[2] << 16) |
-	              (dev->dev_addr[1] <<  8) | dev->dev_addr[0]);
+	writel((dev->dev_addr[5] <<  8) |
+	       dev->dev_addr[4],
+	       &ip->regs->emar_h);
+	writel((dev->dev_addr[3] << 24) |
+	       (dev->dev_addr[2] << 16) |
+	       (dev->dev_addr[1] <<  8) |
+	       dev->dev_addr[0],
+	       &ip->regs->emar_l);
 }
 
 static int ioc3_set_mac_address(struct net_device *dev, void *addr)
@@ -469,24 +414,29 @@ static int ioc3_set_mac_address(struct net_device *dev, void *addr)
 static int ioc3_mdio_read(struct net_device *dev, int phy, int reg)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
 
-	while (ioc3_r_micr() & MICR_BUSY);
-	ioc3_w_micr((phy << MICR_PHYADDR_SHIFT) | reg | MICR_READTRIG);
-	while (ioc3_r_micr() & MICR_BUSY);
+	while (readl(&regs->micr) & MICR_BUSY)
+		;
+	writel((phy << MICR_PHYADDR_SHIFT) | reg | MICR_READTRIG,
+	       &regs->micr);
+	while (readl(&regs->micr) & MICR_BUSY)
+		;
 
-	return ioc3_r_midr_r() & MIDR_DATA_MASK;
+	return readl(&regs->midr_r) & MIDR_DATA_MASK;
 }
 
 static void ioc3_mdio_write(struct net_device *dev, int phy, int reg, int data)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
-
-	while (ioc3_r_micr() & MICR_BUSY);
-	ioc3_w_midr_w(data);
-	ioc3_w_micr((phy << MICR_PHYADDR_SHIFT) | reg);
-	while (ioc3_r_micr() & MICR_BUSY);
+	struct ioc3_ethregs *regs = ip->regs;
+
+	while (readl(&regs->micr) & MICR_BUSY)
+		;
+	writel(data, &regs->midr_w);
+	writel((phy << MICR_PHYADDR_SHIFT) | reg, &regs->micr);
+	while (readl(&regs->micr) & MICR_BUSY)
+		;
 }
 
 static int ioc3_mii_init(struct ioc3_private *ip);
@@ -494,9 +444,9 @@ static int ioc3_mii_init(struct ioc3_private *ip);
 static struct net_device_stats *ioc3_get_stats(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
 
-	dev->stats.collisions += (ioc3_r_etcdc() & ETCDC_COLLCNT_MASK);
+	dev->stats.collisions += readl(&regs->etcdc) & ETCDC_COLLCNT_MASK;
 	return &dev->stats;
 }
 
@@ -572,7 +522,6 @@ static inline void ioc3_rx(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
 	struct sk_buff *skb, *new_skb;
-	struct ioc3 *ioc3 = ip->regs;
 	int rx_entry, n_entry, len;
 	struct ioc3_erxbuf *rxb;
 	unsigned long *rxr;
@@ -640,7 +589,7 @@ static inline void ioc3_rx(struct net_device *dev)
 		rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
 		w0 = be32_to_cpu(rxb->w0);
 	}
-	ioc3_w_erpir((n_entry << 3) | ERPIR_ARM);
+	writel((n_entry << 3) | ERPIR_ARM, &ip->regs->erpir);
 	ip->rx_pi = n_entry;
 	ip->rx_ci = rx_entry;
 }
@@ -648,14 +597,14 @@ static inline void ioc3_rx(struct net_device *dev)
 static inline void ioc3_tx(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
+	struct ioc3_ethregs *regs = ip->regs;
 	unsigned long packets, bytes;
-	struct ioc3 *ioc3 = ip->regs;
 	int tx_entry, o_entry;
 	struct sk_buff *skb;
 	u32 etcir;
 
 	spin_lock(&ip->ioc3_lock);
-	etcir = ioc3_r_etcir();
+	etcir = readl(&regs->etcir);
 
 	tx_entry = (etcir >> 7) & 127;
 	o_entry = ip->tx_ci;
@@ -671,7 +620,7 @@ static inline void ioc3_tx(struct net_device *dev)
 
 		o_entry = (o_entry + 1) & 127;		/* Next */
 
-		etcir = ioc3_r_etcir();			/* More pkts sent?  */
+		etcir = readl(&regs->etcir);		/* More pkts sent?  */
 		tx_entry = (etcir >> 7) & 127;
 	}
 
@@ -724,44 +673,39 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
 
 /* The interrupt handler does all of the Rx thread work and cleans up
    after the Tx thread.  */
-static irqreturn_t ioc3_interrupt(int irq, void *_dev)
+static irqreturn_t ioc3_interrupt(int irq, void *dev_id)
 {
-	struct net_device *dev = (struct net_device *)_dev;
-	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
-	const u32 enabled = EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
-	                    EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
-	                    EISR_TXEXPLICIT | EISR_TXMEMERR;
+	struct ioc3_private *ip = netdev_priv(dev_id);
+	struct ioc3_ethregs *regs = ip->regs;
 	u32 eisr;
 
-	eisr = ioc3_r_eisr() & enabled;
-
-	ioc3_w_eisr(eisr);
-	(void) ioc3_r_eisr();				/* Flush */
+	eisr = readl(&regs->eisr);
+	writel(eisr, &regs->eisr);
+	readl(&regs->eisr);				/* Flush */
 
 	if (eisr & (EISR_RXOFLO | EISR_RXBUFOFLO | EISR_RXMEMERR |
 	            EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR))
-		ioc3_error(dev, eisr);
+		ioc3_error(dev_id, eisr);
 	if (eisr & EISR_RXTIMERINT)
-		ioc3_rx(dev);
+		ioc3_rx(dev_id);
 	if (eisr & EISR_TXEXPLICIT)
-		ioc3_tx(dev);
+		ioc3_tx(dev_id);
 
 	return IRQ_HANDLED;
 }
 
 static inline void ioc3_setup_duplex(struct ioc3_private *ip)
 {
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
 
 	if (ip->mii.full_duplex) {
-		ioc3_w_etcsr(ETCSR_FD);
+		writel(ETCSR_FD, &regs->etcsr);
 		ip->emcr |= EMCR_DUPLEX;
 	} else {
-		ioc3_w_etcsr(ETCSR_HD);
+		writel(ETCSR_HD, &regs->etcsr);
 		ip->emcr &= ~EMCR_DUPLEX;
 	}
-	ioc3_w_emcr(ip->emcr);
+	writel(ip->emcr, &regs->emcr);
 }
 
 static void ioc3_timer(struct timer_list *t)
@@ -936,7 +880,7 @@ static void ioc3_alloc_rings(struct net_device *dev)
 static void ioc3_init_rings(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
 	unsigned long ring;
 
 	ioc3_free_rings(ip);
@@ -947,90 +891,94 @@ static void ioc3_init_rings(struct net_device *dev)
 
 	/* Now the rx ring base, consume & produce registers.  */
 	ring = ioc3_map(ip->rxr, 0);
-	ioc3_w_erbr_h(ring >> 32);
-	ioc3_w_erbr_l(ring & 0xffffffff);
-	ioc3_w_ercir(ip->rx_ci << 3);
-	ioc3_w_erpir((ip->rx_pi << 3) | ERPIR_ARM);
+	writel(ring >> 32, &regs->erbr_h);
+	writel(ring & 0xffffffff, &regs->erbr_l);
+	writel(ip->rx_ci << 3, &regs->ercir);
+	writel((ip->rx_pi << 3) | ERPIR_ARM, &regs->erpir);
 
 	ring = ioc3_map(ip->txr, 0);
 
 	ip->txqlen = 0;					/* nothing queued  */
 
 	/* Now the tx ring base, consume & produce registers.  */
-	ioc3_w_etbr_h(ring >> 32);
-	ioc3_w_etbr_l(ring & 0xffffffff);
-	ioc3_w_etpir(ip->tx_pi << 7);
-	ioc3_w_etcir(ip->tx_ci << 7);
-	(void) ioc3_r_etcir();				/* Flush */
+	writel(ring >> 32, &regs->etbr_h);
+	writel(ring & 0xffffffff, &regs->etbr_l);
+	writel(ip->tx_pi << 7, &regs->etpir);
+	writel(ip->tx_ci << 7, &regs->etcir);
+	readl(&regs->etcir);				/* Flush */
 }
 
 static inline void ioc3_ssram_disc(struct ioc3_private *ip)
 {
-	struct ioc3 *ioc3 = ip->regs;
-	volatile u32 *ssram0 = &ioc3->ssram[0x0000];
-	volatile u32 *ssram1 = &ioc3->ssram[0x4000];
-	unsigned int pattern = 0x5555;
+	struct ioc3_ethregs *regs = ip->regs;
+	u32 *ssram0 = &ip->ssram[0x0000];
+	u32 *ssram1 = &ip->ssram[0x4000];
+	u32 pattern = 0x5555;
 
 	/* Assume the larger size SSRAM and enable parity checking */
-	ioc3_w_emcr(ioc3_r_emcr() | (EMCR_BUFSIZ | EMCR_RAMPAR));
+	writel(readl(&regs->emcr) | (EMCR_BUFSIZ | EMCR_RAMPAR), &regs->emcr);
+	readl(&regs->emcr); /* Flush */
 
-	*ssram0 = pattern;
-	*ssram1 = ~pattern & IOC3_SSRAM_DM;
+	writel(pattern, ssram0);
+	writel(~pattern & IOC3_SSRAM_DM, ssram1);
 
-	if ((*ssram0 & IOC3_SSRAM_DM) != pattern ||
-	    (*ssram1 & IOC3_SSRAM_DM) != (~pattern & IOC3_SSRAM_DM)) {
+	if ((readl(ssram0) & IOC3_SSRAM_DM) != pattern ||
+	    (readl(ssram1) & IOC3_SSRAM_DM) != (~pattern & IOC3_SSRAM_DM)) {
 		/* set ssram size to 64 KB */
-		ip->emcr = EMCR_RAMPAR;
-		ioc3_w_emcr(ioc3_r_emcr() & ~EMCR_BUFSIZ);
-	} else
-		ip->emcr = EMCR_BUFSIZ | EMCR_RAMPAR;
+		ip->emcr |= EMCR_RAMPAR;
+		writel(readl(&regs->emcr) & ~EMCR_BUFSIZ, &regs->emcr);
+	} else {
+		ip->emcr |= EMCR_BUFSIZ | EMCR_RAMPAR;
+	}
 }
 
 static void ioc3_init(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
 
 	del_timer_sync(&ip->ioc3_timer);	/* Kill if running	*/
 
-	ioc3_w_emcr(EMCR_RST);			/* Reset		*/
-	(void) ioc3_r_emcr();			/* Flush WB		*/
+	writel(EMCR_RST, &regs->emcr);		/* Reset		*/
+	readl(&regs->emcr);			/* Flush WB		*/
 	udelay(4);				/* Give it time ...	*/
-	ioc3_w_emcr(0);
-	(void) ioc3_r_emcr();
+	writel(0, &regs->emcr);
+	readl(&regs->emcr);
 
 	/* Misc registers  */
 #ifdef CONFIG_SGI_IP27
-	ioc3_w_erbar(PCI64_ATTR_BAR >> 32);	/* Barrier on last store */
+	/* Barrier on last store */
+	writel(PCI64_ATTR_BAR >> 32, &regs->erbar);
 #else
-	ioc3_w_erbar(0);			/* Let PCI API get it right */
+	/* Let PCI API get it right */
+	writel(0, &regs->erbar);
 #endif
-	(void) ioc3_r_etcdc();			/* Clear on read */
-	ioc3_w_ercsr(15);			/* RX low watermark  */
-	ioc3_w_ertr(0);				/* Interrupt immediately */
+	readl(&regs->etcdc);			/* Clear on read */
+	writel(15, &regs->ercsr);		/* RX low watermark  */
+	writel(0, &regs->ertr);			/* Interrupt immediately */
 	__ioc3_set_mac_address(dev);
-	ioc3_w_ehar_h(ip->ehar_h);
-	ioc3_w_ehar_l(ip->ehar_l);
-	ioc3_w_ersr(42);			/* XXX should be random */
+	writel(ip->ehar_h, &regs->ehar_h);
+	writel(ip->ehar_l, &regs->ehar_l);
+	writel(42, &regs->ersr);		/* XXX should be random */
 
 	ioc3_init_rings(dev);
 
 	ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN |
 	             EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
-	ioc3_w_emcr(ip->emcr);
-	ioc3_w_eier(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
-	            EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
-	            EISR_TXEXPLICIT | EISR_TXMEMERR);
-	(void) ioc3_r_eier();
+	writel(ip->emcr, &regs->emcr);
+	writel(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
+	       EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
+	       EISR_TXEXPLICIT | EISR_TXMEMERR, &regs->eier);
+	readl(&regs->eier);
 }
 
 static inline void ioc3_stop(struct ioc3_private *ip)
 {
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
 
-	ioc3_w_emcr(0);				/* Shutup */
-	ioc3_w_eier(0);				/* Disable interrupts */
-	(void) ioc3_r_eier();			/* Flush */
+	writel(0, &regs->emcr);			/* Shutup */
+	writel(0, &regs->eier);			/* Disable interrupts */
+	readl(&regs->eier);			/* Flush */
 }
 
 static int ioc3_open(struct net_device *dev)
@@ -1153,16 +1101,18 @@ static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart)
 	};
 	unsigned char lcr;
 
-	lcr = uart->iu_lcr;
-	uart->iu_lcr = lcr | UART_LCR_DLAB;
-	uart->iu_scr = COSMISC_CONSTANT,
-	uart->iu_lcr = lcr;
-	uart->iu_lcr;
+	lcr = readb(&uart->iu_lcr);
+	writeb(lcr | UART_LCR_DLAB, &uart->iu_lcr);
+	writeb(COSMISC_CONSTANT, &uart->iu_scr);
+	writeb(lcr, &uart->iu_lcr);
+	readb(&uart->iu_lcr);
 	serial8250_register_8250_port(&port);
 }
 
 static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
 {
+	u32 sio_iec;
+
 	/*
 	 * We need to recognice and treat the fourth MENET serial as it
 	 * does not have an SuperIO chip attached to it, therefore attempting
@@ -1179,29 +1129,31 @@ static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
 	 * Switch IOC3 to PIO mode.  It probably already was but let's be
 	 * paranoid
 	 */
-	ioc3->gpcr_s = GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL;
-	ioc3->gpcr_s;
-	ioc3->gppr_6 = 0;
-	ioc3->gppr_6;
-	ioc3->gppr_7 = 0;
-	ioc3->gppr_7;
-	ioc3->sscr_a = ioc3->sscr_a & ~SSCR_DMA_EN;
-	ioc3->sscr_a;
-	ioc3->sscr_b = ioc3->sscr_b & ~SSCR_DMA_EN;
-	ioc3->sscr_b;
+	writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, &ioc3->gpcr_s);
+	readl(&ioc3->gpcr_s);
+	writel(0, &ioc3->gppr[6]);
+	readl(&ioc3->gppr[6]);
+	writel(0, &ioc3->gppr[7]);
+	readl(&ioc3->gppr[7]);
+	writel(readl(&ioc3->port_a.sscr) & ~SSCR_DMA_EN, &ioc3->port_a.sscr);
+	readl(&ioc3->port_a.sscr);
+	writel(readl(&ioc3->port_b.sscr) & ~SSCR_DMA_EN, &ioc3->port_b.sscr);
+	readl(&ioc3->port_b.sscr);
 	/* Disable all SA/B interrupts except for SA/B_INT in SIO_IEC. */
-	ioc3->sio_iec &= ~ (SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL |
-			    SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER |
-			    SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS |
-			    SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR);
-	ioc3->sio_iec |= SIO_IR_SA_INT;
-	ioc3->sscr_a = 0;
-	ioc3->sio_iec &= ~ (SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL |
-			    SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER |
-			    SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS |
-			    SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR);
-	ioc3->sio_iec |= SIO_IR_SB_INT;
-	ioc3->sscr_b = 0;
+	sio_iec = readl(&ioc3->sio_iec);
+	sio_iec &= ~(SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL |
+		     SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER |
+		     SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS |
+		     SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR);
+	sio_iec |= SIO_IR_SA_INT;
+	sio_iec &= ~(SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL |
+		     SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER |
+		     SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS |
+		     SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR);
+	sio_iec |= SIO_IR_SB_INT;
+	writel(sio_iec, &ioc3->sio_iec);
+	writel(0, &ioc3->port_a.sscr);
+	writel(0, &ioc3->port_b.sscr);
 
 	ioc3_8250_register(&ioc3->sregs.uarta);
 	ioc3_8250_register(&ioc3->sregs.uartb);
@@ -1282,7 +1234,9 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		err = -ENOMEM;
 		goto out_res;
 	}
-	ip->regs = ioc3;
+	ip->regs = &ioc3->eth;
+	ip->ssram = ioc3->ssram;
+	ip->all_regs = ioc3;
 
 #ifdef CONFIG_SERIAL_8250
 	ioc3_serial_probe(pdev, ioc3);
@@ -1363,12 +1317,11 @@ static void ioc3_remove_one(struct pci_dev *pdev)
 {
 	struct net_device *dev = pci_get_drvdata(pdev);
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
 
 	unregister_netdev(dev);
 	del_timer_sync(&ip->ioc3_timer);
 
-	iounmap(ioc3);
+	iounmap(ip->all_regs);
 	pci_release_regions(pdev);
 	free_netdev(dev);
 	/*
@@ -1392,11 +1345,10 @@ static struct pci_driver ioc3_driver = {
 
 static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-	unsigned long data;
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
-	unsigned int len;
 	struct ioc3_etxd *desc;
+	unsigned long data;
+	unsigned int len;
 	uint32_t w0 = 0;
 	int produce;
 
@@ -1489,7 +1441,7 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	ip->tx_skbs[produce] = skb;			/* Remember skb */
 	produce = (produce + 1) & 127;
 	ip->tx_pi = produce;
-	ioc3_w_etpir(produce << 7);			/* Fire ... */
+	writel(produce << 7, &ip->regs->etpir);		/* Fire ... */
 
 	ip->txqlen++;
 
@@ -1623,21 +1575,21 @@ static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 
 static void ioc3_set_multicast_list(struct net_device *dev)
 {
-	struct netdev_hw_addr *ha;
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3 *ioc3 = ip->regs;
+	struct ioc3_ethregs *regs = ip->regs;
+	struct netdev_hw_addr *ha;
 	u64 ehar = 0;
 
 	netif_stop_queue(dev);				/* Lock out others. */
 
 	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous.  */
 		ip->emcr |= EMCR_PROMISC;
-		ioc3_w_emcr(ip->emcr);
-		(void) ioc3_r_emcr();
+		writel(ip->emcr, &regs->emcr);
+		readl(&regs->emcr);
 	} else {
 		ip->emcr &= ~EMCR_PROMISC;
-		ioc3_w_emcr(ip->emcr);			/* Clear promiscuous. */
-		(void) ioc3_r_emcr();
+		writel(ip->emcr, &regs->emcr);		/* Clear promiscuous. */
+		readl(&regs->emcr);
 
 		if ((dev->flags & IFF_ALLMULTI) ||
 		    (netdev_mc_count(dev) > 64)) {
@@ -1653,8 +1605,8 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 			ip->ehar_h = ehar >> 32;
 			ip->ehar_l = ehar & 0xffffffff;
 		}
-		ioc3_w_ehar_h(ip->ehar_h);
-		ioc3_w_ehar_l(ip->ehar_l);
+		writel(ip->ehar_h, &regs->ehar_h);
+		writel(ip->ehar_l, &regs->ehar_l);
 	}
 
 	netif_wake_queue(dev);			/* Let us get going again. */
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 08/17] net: sgi: ioc3-eth: remove checkpatch errors/warning
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (6 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 07/17] MIPS: SGI-IP27: restructure ioc3 register access Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 09/17] net: sgi: ioc3-eth: use defines for constants dealing with desc rings Thomas Bogendoerfer
                   ` (9 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Before massaging the driver further fix oddities found by checkpatch like
- wrong indention
- comment formatting
- use of printk instead or netdev_xxx/pr_xxx

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 275 +++++++++++++++++-------------------
 1 file changed, 130 insertions(+), 145 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 713d2472cb97..e81e5bb37ac6 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1,9 +1,5 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Driver for SGI's IOC3 based Ethernet cards as found in the PCI card.
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for SGI's IOC3 based Ethernet cards as found in the PCI card.
  *
  * Copyright (C) 1999, 2000, 01, 03, 06 Ralf Baechle
  * Copyright (C) 1995, 1999, 2000, 2001 by Silicon Graphics, Inc.
@@ -39,6 +35,7 @@
 #include <linux/crc32.h>
 #include <linux/mii.h>
 #include <linux/in.h>
+#include <linux/io.h>
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/udp.h>
@@ -58,21 +55,19 @@
 #include <net/ip.h>
 
 #include <asm/byteorder.h>
-#include <asm/io.h>
 #include <asm/pgtable.h>
 #include <linux/uaccess.h>
 #include <asm/sn/types.h>
 #include <asm/sn/ioc3.h>
 #include <asm/pci/bridge.h>
 
-/*
- * 64 RX buffers.  This is tunable in the range of 16 <= x < 512.  The
+/* 64 RX buffers.  This is tunable in the range of 16 <= x < 512.  The
  * value must be a power of two.
  */
 #define RX_BUFFS 64
 
-#define ETCSR_FD	((17<<ETCSR_IPGR2_SHIFT) | (11<<ETCSR_IPGR1_SHIFT) | 21)
-#define ETCSR_HD	((21<<ETCSR_IPGR2_SHIFT) | (21<<ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_FD   ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_HD   ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
 
 /* Private per NIC data of the driver.  */
 struct ioc3_private {
@@ -119,14 +114,15 @@ static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
 	return (~addr + 1) & (IOC3_CACHELINE - 1UL);
 }
 
-static inline struct sk_buff * ioc3_alloc_skb(unsigned long length,
-	unsigned int gfp_mask)
+static inline struct sk_buff *ioc3_alloc_skb(unsigned long length,
+					     unsigned int gfp_mask)
 {
 	struct sk_buff *skb;
 
 	skb = alloc_skb(length + IOC3_CACHELINE - 1, gfp_mask);
 	if (likely(skb)) {
-		int offset = aligned_rx_skb_addr((unsigned long) skb->data);
+		int offset = aligned_rx_skb_addr((unsigned long)skb->data);
+
 		if (offset)
 			skb_reserve(skb, offset);
 	}
@@ -147,15 +143,11 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
 }
 
 /* BEWARE: The IOC3 documentation documents the size of rx buffers as
-   1644 while it's actually 1664.  This one was nasty to track down ...  */
+ * 1644 while it's actually 1664.  This one was nasty to track down ...
+ */
 #define RX_OFFSET		10
 #define RX_BUF_ALLOC_SIZE	(1664 + RX_OFFSET + IOC3_CACHELINE)
 
-/* DMA barrier to separate cached and uncached accesses.  */
-#define BARRIER()							\
-	__asm__("sync" ::: "memory")
-
-
 #define IOC3_SIZE 0x100000
 
 static inline u32 mcr_pack(u32 pulse, u32 sample)
@@ -176,7 +168,7 @@ static int nic_wait(u32 __iomem *mcr)
 
 static int nic_reset(u32 __iomem *mcr)
 {
-        int presence;
+	int presence;
 
 	writel(mcr_pack(500, 65), mcr);
 	presence = nic_wait(mcr);
@@ -184,7 +176,7 @@ static int nic_reset(u32 __iomem *mcr)
 	writel(mcr_pack(0, 500), mcr);
 	nic_wait(mcr);
 
-        return presence;
+	return presence;
 }
 
 static inline int nic_read_bit(u32 __iomem *mcr)
@@ -209,8 +201,7 @@ static inline void nic_write_bit(u32 __iomem *mcr, int bit)
 	nic_wait(mcr);
 }
 
-/*
- * Read a byte from an iButton device
+/* Read a byte from an iButton device
  */
 static u32 nic_read_byte(u32 __iomem *mcr)
 {
@@ -223,8 +214,7 @@ static u32 nic_read_byte(u32 __iomem *mcr)
 	return result;
 }
 
-/*
- * Write a byte to an iButton device
+/* Write a byte to an iButton device
  */
 static void nic_write_byte(u32 __iomem *mcr, int byte)
 {
@@ -253,7 +243,7 @@ static u64 nic_find(u32 __iomem *mcr, int *last)
 		b = nic_read_bit(mcr);
 
 		if (a && b) {
-			printk("NIC search failed (not fatal).\n");
+			pr_warn("NIC search failed (not fatal).\n");
 			*last = 0;
 			return 0;
 		}
@@ -264,8 +254,9 @@ static u64 nic_find(u32 __iomem *mcr, int *last)
 			} else if (index > *last) {
 				address &= ~(1UL << index);
 				disc = index;
-			} else if ((address & (1UL << index)) == 0)
+			} else if ((address & (1UL << index)) == 0) {
 				disc = index;
+			}
 			nic_write_bit(mcr, address & (1UL << index));
 			continue;
 		} else {
@@ -293,6 +284,7 @@ static int nic_init(u32 __iomem *mcr)
 
 	while (1) {
 		u64 reg;
+
 		reg = nic_find(mcr, &save);
 
 		switch (reg & 0xff) {
@@ -323,16 +315,15 @@ static int nic_init(u32 __iomem *mcr)
 		break;
 	}
 
-	printk("Found %s NIC", type);
+	pr_info("Found %s NIC", type);
 	if (type != unknown)
-		printk (" registration number %pM, CRC %02x", serial, crc);
-	printk(".\n");
+		pr_cont(" registration number %pM, CRC %02x", serial, crc);
+	pr_cont(".\n");
 
 	return 0;
 }
 
-/*
- * Read the NIC (Number-In-a-Can) device used to store the MAC address on
+/* Read the NIC (Number-In-a-Can) device used to store the MAC address on
  * SN0 / SN00 nodeboards and PCI cards.
  */
 static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
@@ -351,7 +342,7 @@ static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
 	}
 
 	if (tries < 0) {
-		printk("Failed to read MAC address\n");
+		pr_err("Failed to read MAC address\n");
 		return;
 	}
 
@@ -367,8 +358,7 @@ static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
 		ip->dev->dev_addr[i - 2] = nic[i];
 }
 
-/*
- * Ok, this is hosed by design.  It's necessary to know what machine the
+/* Ok, this is hosed by design.  It's necessary to know what machine the
  * NIC is in in order to know how to read the NIC address.  We also have
  * to know if it's a PCI card or a NIC in on the node board ...
  */
@@ -376,7 +366,7 @@ static void ioc3_get_eaddr(struct ioc3_private *ip)
 {
 	ioc3_get_eaddr_nic(ip);
 
-	printk("Ethernet address is %pM.\n", ip->dev->dev_addr);
+	pr_info("Ethernet address is %pM.\n", ip->dev->dev_addr);
 }
 
 static void __ioc3_set_mac_address(struct net_device *dev)
@@ -407,8 +397,7 @@ static int ioc3_set_mac_address(struct net_device *dev, void *addr)
 	return 0;
 }
 
-/*
- * Caller must hold the ioc3_lock ever for MII readers.  This is also
+/* Caller must hold the ioc3_lock ever for MII readers.  This is also
  * used to protect the transmitter side but it's low contention.
  */
 static int ioc3_mdio_read(struct net_device *dev, int phy, int reg)
@@ -450,17 +439,16 @@ static struct net_device_stats *ioc3_get_stats(struct net_device *dev)
 	return &dev->stats;
 }
 
-static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
+static void ioc3_tcpudp_checksum(struct sk_buff *skb, u32 hwsum, int len)
 {
 	struct ethhdr *eh = eth_hdr(skb);
-	uint32_t csum, ehsum;
 	unsigned int proto;
-	struct iphdr *ih;
-	uint16_t *ew;
 	unsigned char *cp;
+	struct iphdr *ih;
+	u32 csum, ehsum;
+	u16 *ew;
 
-	/*
-	 * Did hardware handle the checksum at all?  The cases we can handle
+	/* Did hardware handle the checksum at all?  The cases we can handle
 	 * are:
 	 *
 	 * - TCP and UDP checksums of IPv4 only.
@@ -476,7 +464,7 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
 	if (eh->h_proto != htons(ETH_P_IP))
 		return;
 
-	ih = (struct iphdr *) ((char *)eh + ETH_HLEN);
+	ih = (struct iphdr *)((char *)eh + ETH_HLEN);
 	if (ip_is_fragment(ih))
 		return;
 
@@ -487,12 +475,12 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
 	/* Same as tx - compute csum of pseudo header  */
 	csum = hwsum +
 	       (ih->tot_len - (ih->ihl << 2)) +
-	       htons((uint16_t)ih->protocol) +
+	       htons((u16)ih->protocol) +
 	       (ih->saddr >> 16) + (ih->saddr & 0xffff) +
 	       (ih->daddr >> 16) + (ih->daddr & 0xffff);
 
 	/* Sum up ethernet dest addr, src addr and protocol  */
-	ew = (uint16_t *) eh;
+	ew = (u16 *)eh;
 	ehsum = ew[0] + ew[1] + ew[2] + ew[3] + ew[4] + ew[5] + ew[6];
 
 	ehsum = (ehsum & 0xffff) + (ehsum >> 16);
@@ -501,14 +489,15 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
 	csum += 0xffff ^ ehsum;
 
 	/* In the next step we also subtract the 1's complement
-	   checksum of the trailing ethernet CRC.  */
+	 * checksum of the trailing ethernet CRC.
+	 */
 	cp = (char *)eh + len;	/* points at trailing CRC */
 	if (len & 1) {
-		csum += 0xffff ^ (uint16_t) ((cp[1] << 8) | cp[0]);
-		csum += 0xffff ^ (uint16_t) ((cp[3] << 8) | cp[2]);
+		csum += 0xffff ^ (u16)((cp[1] << 8) | cp[0]);
+		csum += 0xffff ^ (u16)((cp[3] << 8) | cp[2]);
 	} else {
-		csum += 0xffff ^ (uint16_t) ((cp[0] << 8) | cp[1]);
-		csum += 0xffff ^ (uint16_t) ((cp[2] << 8) | cp[3]);
+		csum += 0xffff ^ (u16)((cp[0] << 8) | cp[1]);
+		csum += 0xffff ^ (u16)((cp[2] << 8) | cp[3]);
 	}
 
 	csum = (csum & 0xffff) + (csum >> 16);
@@ -532,7 +521,7 @@ static inline void ioc3_rx(struct net_device *dev)
 	n_entry = ip->rx_pi;
 
 	skb = ip->rx_skbs[rx_entry];
-	rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
+	rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
 	w0 = be32_to_cpu(rxb->w0);
 
 	while (w0 & ERXBUF_V) {
@@ -545,7 +534,8 @@ static inline void ioc3_rx(struct net_device *dev)
 			new_skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
 			if (!new_skb) {
 				/* Ouch, drop packet and just recycle packet
-				   to keep the ring filled.  */
+				 * to keep the ring filled.
+				 */
 				dev->stats.rx_dropped++;
 				new_skb = skb;
 				goto next;
@@ -553,7 +543,8 @@ static inline void ioc3_rx(struct net_device *dev)
 
 			if (likely(dev->features & NETIF_F_RXCSUM))
 				ioc3_tcpudp_checksum(skb,
-					w0 & ERXBUF_IPCKSUM_MASK, len);
+						     w0 & ERXBUF_IPCKSUM_MASK,
+						     len);
 
 			netif_rx(skb);
 
@@ -561,15 +552,16 @@ static inline void ioc3_rx(struct net_device *dev)
 
 			/* Because we reserve afterwards. */
 			skb_put(new_skb, (1664 + RX_OFFSET));
-			rxb = (struct ioc3_erxbuf *) new_skb->data;
+			rxb = (struct ioc3_erxbuf *)new_skb->data;
 			skb_reserve(new_skb, RX_OFFSET);
 
 			dev->stats.rx_packets++;		/* Statistics */
 			dev->stats.rx_bytes += len;
 		} else {
 			/* The frame is invalid and the skb never
-			   reached the network layer so we can just
-			   recycle it.  */
+			 * reached the network layer so we can just
+			 * recycle it.
+			 */
 			new_skb = skb;
 			dev->stats.rx_errors++;
 		}
@@ -586,7 +578,7 @@ static inline void ioc3_rx(struct net_device *dev)
 		/* Now go on to the next ring entry.  */
 		rx_entry = (rx_entry + 1) & 511;
 		skb = ip->rx_skbs[rx_entry];
-		rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
+		rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
 		w0 = be32_to_cpu(rxb->w0);
 	}
 	writel((n_entry << 3) | ERPIR_ARM, &ip->regs->erpir);
@@ -635,8 +627,7 @@ static inline void ioc3_tx(struct net_device *dev)
 	spin_unlock(&ip->ioc3_lock);
 }
 
-/*
- * Deal with fatal IOC3 errors.  This condition might be caused by a hard or
+/* Deal with fatal IOC3 errors.  This condition might be caused by a hard or
  * software problems, so we should try to recover
  * more gracefully if this ever happens.  In theory we might be flooded
  * with such error interrupts if something really goes wrong, so we might
@@ -645,22 +636,21 @@ static inline void ioc3_tx(struct net_device *dev)
 static void ioc3_error(struct net_device *dev, u32 eisr)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	unsigned char *iface = dev->name;
 
 	spin_lock(&ip->ioc3_lock);
 
 	if (eisr & EISR_RXOFLO)
-		printk(KERN_ERR "%s: RX overflow.\n", iface);
+		netdev_err(dev, "RX overflow.\n");
 	if (eisr & EISR_RXBUFOFLO)
-		printk(KERN_ERR "%s: RX buffer overflow.\n", iface);
+		netdev_err(dev, "RX buffer overflow.\n");
 	if (eisr & EISR_RXMEMERR)
-		printk(KERN_ERR "%s: RX PCI error.\n", iface);
+		netdev_err(dev, "RX PCI error.\n");
 	if (eisr & EISR_RXPARERR)
-		printk(KERN_ERR "%s: RX SSRAM parity error.\n", iface);
+		netdev_err(dev, "RX SSRAM parity error.\n");
 	if (eisr & EISR_TXBUFUFLO)
-		printk(KERN_ERR "%s: TX buffer underflow.\n", iface);
+		netdev_err(dev, "TX buffer underflow.\n");
 	if (eisr & EISR_TXMEMERR)
-		printk(KERN_ERR "%s: TX PCI error.\n", iface);
+		netdev_err(dev, "TX PCI error.\n");
 
 	ioc3_stop(ip);
 	ioc3_init(dev);
@@ -672,7 +662,8 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
 }
 
 /* The interrupt handler does all of the Rx thread work and cleans up
-   after the Tx thread.  */
+ * after the Tx thread.
+ */
 static irqreturn_t ioc3_interrupt(int irq, void *dev_id)
 {
 	struct ioc3_private *ip = netdev_priv(dev_id);
@@ -684,7 +675,7 @@ static irqreturn_t ioc3_interrupt(int irq, void *dev_id)
 	readl(&regs->eisr);				/* Flush */
 
 	if (eisr & (EISR_RXOFLO | EISR_RXBUFOFLO | EISR_RXMEMERR |
-	            EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR))
+		    EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR))
 		ioc3_error(dev_id, eisr);
 	if (eisr & EISR_RXTIMERINT)
 		ioc3_rx(dev_id);
@@ -716,12 +707,11 @@ static void ioc3_timer(struct timer_list *t)
 	mii_check_media(&ip->mii, 1, 0);
 	ioc3_setup_duplex(ip);
 
-	ip->ioc3_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2s */
+	ip->ioc3_timer.expires = jiffies + ((12 * HZ) / 10); /* 1.2s */
 	add_timer(&ip->ioc3_timer);
 }
 
-/*
- * Try to find a PHY.  There is no apparent relation between the MII addresses
+/* Try to find a PHY.  There is no apparent relation between the MII addresses
  * in the SGI documentation and what we find in reality, so we simply probe
  * for the PHY.  It seems IOC3 PHYs usually live on address 31.  One of my
  * onboard IOC3s has the special oddity that probing doesn't seem to find it
@@ -730,8 +720,8 @@ static void ioc3_timer(struct timer_list *t)
  */
 static int ioc3_mii_init(struct ioc3_private *ip)
 {
-	int i, found = 0, res = 0;
 	int ioc3_phy_workaround = 1;
+	int i, found = 0, res = 0;
 	u16 word;
 
 	for (i = 0; i < 32; i++) {
@@ -744,9 +734,9 @@ static int ioc3_mii_init(struct ioc3_private *ip)
 	}
 
 	if (!found) {
-		if (ioc3_phy_workaround)
+		if (ioc3_phy_workaround) {
 			i = 31;
-		else {
+		} else {
 			ip->mii.phy_id = -1;
 			res = -ENODEV;
 			goto out;
@@ -761,12 +751,13 @@ static int ioc3_mii_init(struct ioc3_private *ip)
 
 static void ioc3_mii_start(struct ioc3_private *ip)
 {
-	ip->ioc3_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
+	ip->ioc3_timer.expires = jiffies + (12 * HZ) / 10;  /* 1.2 sec. */
 	add_timer(&ip->ioc3_timer);
 }
 
 static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
 {
+	struct ioc3_erxbuf *rxb;
 	struct sk_buff *skb;
 	int i;
 
@@ -777,10 +768,9 @@ static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
 	ip->rx_pi &= 511;
 	ip->rx_ci &= 511;
 
-	for (i = ip->rx_ci; i != ip->rx_pi; i = (i+1) & 511) {
-		struct ioc3_erxbuf *rxb;
+	for (i = ip->rx_ci; i != ip->rx_pi; i = (i + 1) & 511) {
 		skb = ip->rx_skbs[i];
-		rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
+		rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
 		rxb->w0 = 0;
 	}
 }
@@ -790,7 +780,7 @@ static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
 	struct sk_buff *skb;
 	int i;
 
-	for (i=0; i < 128; i++) {
+	for (i = 0; i < 128; i++) {
 		skb = ip->tx_skbs[i];
 		if (skb) {
 			ip->tx_skbs[i] = NULL;
@@ -836,16 +826,17 @@ static void ioc3_alloc_rings(struct net_device *dev)
 	unsigned long *rxr;
 	int i;
 
-	if (ip->rxr == NULL) {
+	if (!ip->rxr) {
 		/* Allocate and initialize rx ring.  4kb = 512 entries  */
-		ip->rxr = (unsigned long *) get_zeroed_page(GFP_ATOMIC);
+		ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC);
 		rxr = ip->rxr;
 		if (!rxr)
-			printk("ioc3_alloc_rings(): get_zeroed_page() failed!\n");
+			pr_err("%s: get_zeroed_page() failed!\n", __func__);
 
 		/* Now the rx buffers.  The RX ring may be larger but
-		   we only allocate 16 buffers for now.  Need to tune
-		   this for performance and memory later.  */
+		 * we only allocate 16 buffers for now.  Need to tune
+		 * this for performance and memory later.
+		 */
 		for (i = 0; i < RX_BUFFS; i++) {
 			struct sk_buff *skb;
 
@@ -859,7 +850,7 @@ static void ioc3_alloc_rings(struct net_device *dev)
 
 			/* Because we reserve afterwards. */
 			skb_put(skb, (1664 + RX_OFFSET));
-			rxb = (struct ioc3_erxbuf *) skb->data;
+			rxb = (struct ioc3_erxbuf *)skb->data;
 			rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
 			skb_reserve(skb, RX_OFFSET);
 		}
@@ -867,11 +858,11 @@ static void ioc3_alloc_rings(struct net_device *dev)
 		ip->rx_pi = RX_BUFFS;
 	}
 
-	if (ip->txr == NULL) {
+	if (!ip->txr) {
 		/* Allocate and initialize tx rings.  16kb = 128 bufs.  */
 		ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2);
 		if (!ip->txr)
-			printk("ioc3_alloc_rings(): __get_free_pages() failed!\n");
+			pr_err("%s: __get_free_pages() failed!\n", __func__);
 		ip->tx_pi = 0;
 		ip->tx_ci = 0;
 	}
@@ -964,7 +955,7 @@ static void ioc3_init(struct net_device *dev)
 	ioc3_init_rings(dev);
 
 	ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN |
-	             EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
+		    EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
 	writel(ip->emcr, &regs->emcr);
 	writel(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
 	       EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
@@ -986,7 +977,7 @@ static int ioc3_open(struct net_device *dev)
 	struct ioc3_private *ip = netdev_priv(dev);
 
 	if (request_irq(dev->irq, ioc3_interrupt, IRQF_SHARED, ioc3_str, dev)) {
-		printk(KERN_ERR "%s: Can't get irq %d\n", dev->name, dev->irq);
+		netdev_err(dev, "Can't get irq %d\n", dev->irq);
 
 		return -EAGAIN;
 	}
@@ -1015,8 +1006,7 @@ static int ioc3_close(struct net_device *dev)
 	return 0;
 }
 
-/*
- * MENET cards have four IOC3 chips, which are attached to two sets of
+/* MENET cards have four IOC3 chips, which are attached to two sets of
  * PCI slot resources each: the primary connections are on slots
  * 0..3 and the secondaries are on 4..7
  *
@@ -1033,7 +1023,7 @@ static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
 
 	if (dev) {
 		if (dev->vendor == PCI_VENDOR_ID_SGI &&
-			dev->device == PCI_DEVICE_ID_SGI_IOC3)
+		    dev->device == PCI_DEVICE_ID_SGI_IOC3)
 			ret = 1;
 		pci_dev_put(dev);
 	}
@@ -1043,15 +1033,14 @@ static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
 
 static int ioc3_is_menet(struct pci_dev *pdev)
 {
-	return pdev->bus->parent == NULL &&
+	return !pdev->bus->parent &&
 	       ioc3_adjacent_is_ioc3(pdev, 0) &&
 	       ioc3_adjacent_is_ioc3(pdev, 1) &&
 	       ioc3_adjacent_is_ioc3(pdev, 2);
 }
 
 #ifdef CONFIG_SERIAL_8250
-/*
- * Note about serial ports and consoles:
+/* Note about serial ports and consoles:
  * For console output, everyone uses the IOC3 UARTA (offset 0x178)
  * connected to the master node (look in ip27_setup_console() and
  * ip27prom_console_write()).
@@ -1088,16 +1077,16 @@ static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart)
 #define COSMISC_CONSTANT 6
 
 	struct uart_8250_port port = {
-	        .port = {
+		.port = {
 			.irq		= 0,
 			.flags		= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
 			.iotype		= UPIO_MEM,
 			.regshift	= 0,
 			.uartclk	= (22000000 << 1) / COSMISC_CONSTANT,
 
-			.membase	= (unsigned char __iomem *) uart,
-			.mapbase	= (unsigned long) uart,
-                }
+			.membase	= (unsigned char __iomem *)uart,
+			.mapbase	= (unsigned long)uart,
+		}
 	};
 	unsigned char lcr;
 
@@ -1113,8 +1102,7 @@ static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
 {
 	u32 sio_iec;
 
-	/*
-	 * We need to recognice and treat the fourth MENET serial as it
+	/* We need to recognice and treat the fourth MENET serial as it
 	 * does not have an SuperIO chip attached to it, therefore attempting
 	 * to access it will result in bus errors.  We call something an
 	 * MENET if PCI slot 0, 1, 2 and 3 of a master PCI bus all have an IOC3
@@ -1125,8 +1113,7 @@ static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
 	if (ioc3_is_menet(pdev) && PCI_SLOT(pdev->devfn) == 3)
 		return;
 
-	/*
-	 * Switch IOC3 to PIO mode.  It probably already was but let's be
+	/* Switch IOC3 to PIO mode.  It probably already was but let's be
 	 * paranoid
 	 */
 	writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, &ioc3->gpcr_s);
@@ -1188,15 +1175,15 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		pci_using_dac = 1;
 		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 		if (err < 0) {
-			printk(KERN_ERR "%s: Unable to obtain 64 bit DMA "
-			       "for consistent allocations\n", pci_name(pdev));
+			pr_err("%s: Unable to obtain 64 bit DMA for consistent allocations\n",
+			       pci_name(pdev));
 			goto out;
 		}
 	} else {
 		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 		if (err) {
-			printk(KERN_ERR "%s: No usable DMA configuration, "
-			       "aborting.\n", pci_name(pdev));
+			pr_err("%s: No usable DMA configuration, aborting.\n",
+			       pci_name(pdev));
 			goto out;
 		}
 		pci_using_dac = 0;
@@ -1227,9 +1214,9 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	ioc3_base = pci_resource_start(pdev, 0);
 	ioc3_size = pci_resource_len(pdev, 0);
-	ioc3 = (struct ioc3 *) ioremap(ioc3_base, ioc3_size);
+	ioc3 = (struct ioc3 *)ioremap(ioc3_base, ioc3_size);
 	if (!ioc3) {
-		printk(KERN_CRIT "ioc3eth(%s): ioremap failed, goodbye.\n",
+		pr_err("ioc3eth(%s): ioremap failed, goodbye.\n",
 		       pci_name(pdev));
 		err = -ENOMEM;
 		goto out_res;
@@ -1259,7 +1246,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	ioc3_mii_init(ip);
 
 	if (ip->mii.phy_id == -1) {
-		printk(KERN_CRIT "ioc3-eth(%s): Didn't find a PHY, goodbye.\n",
+		pr_err("ioc3-eth(%s): Didn't find a PHY, goodbye.\n",
 		       pci_name(pdev));
 		err = -ENODEV;
 		goto out_stop;
@@ -1289,10 +1276,10 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	vendor = (sw_physid1 << 12) | (sw_physid2 >> 4);
 	model  = (sw_physid2 >> 4) & 0x3f;
 	rev    = sw_physid2 & 0xf;
-	printk(KERN_INFO "%s: Using PHY %d, vendor 0x%x, model %d, "
-	       "rev %d.\n", dev->name, ip->mii.phy_id, vendor, model, rev);
-	printk(KERN_INFO "%s: IOC3 SSRAM has %d kbyte.\n", dev->name,
-	       ip->emcr & EMCR_BUFSIZ ? 128 : 64);
+	netdev_info(dev, "Using PHY %d, vendor 0x%x, model %d, rev %d.\n",
+		    ip->mii.phy_id, vendor, model, rev);
+	netdev_info(dev, "IOC3 SSRAM has %d kbyte.\n",
+		    ip->emcr & EMCR_BUFSIZ ? 128 : 64);
 
 	return 0;
 
@@ -1305,8 +1292,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 out_free:
 	free_netdev(dev);
 out_disable:
-	/*
-	 * We should call pci_disable_device(pdev); here if the IOC3 wasn't
+	/* We should call pci_disable_device(pdev); here if the IOC3 wasn't
 	 * such a weird device ...
 	 */
 out:
@@ -1324,8 +1310,7 @@ static void ioc3_remove_one(struct pci_dev *pdev)
 	iounmap(ip->all_regs);
 	pci_release_regions(pdev);
 	free_netdev(dev);
-	/*
-	 * We should call pci_disable_device(pdev); here if the IOC3 wasn't
+	/* We should call pci_disable_device(pdev); here if the IOC3 wasn't
 	 * such a weird device ...
 	 */
 }
@@ -1349,11 +1334,10 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct ioc3_etxd *desc;
 	unsigned long data;
 	unsigned int len;
-	uint32_t w0 = 0;
 	int produce;
+	u32 w0 = 0;
 
-	/*
-	 * IOC3 has a fairly simple minded checksumming hardware which simply
+	/* IOC3 has a fairly simple minded checksumming hardware which simply
 	 * adds up the 1's complement checksum for the entire packet and
 	 * inserts it at an offset which can be specified in the descriptor
 	 * into the transmit packet.  This means we have to compensate for the
@@ -1364,12 +1348,13 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		const struct iphdr *ih = ip_hdr(skb);
 		const int proto = ntohs(ih->protocol);
 		unsigned int csoff;
-		uint32_t csum, ehsum;
-		uint16_t *eh;
+		u32 csum, ehsum;
+		u16 *eh;
 
 		/* The MAC header.  skb->mac seem the logic approach
-		   to find the MAC header - except it's a NULL pointer ...  */
-		eh = (uint16_t *) skb->data;
+		 * to find the MAC header - except it's a NULL pointer ...
+		 */
+		eh = (u16 *)skb->data;
 
 		/* Sum up dest addr, src addr and protocol  */
 		ehsum = eh[0] + eh[1] + eh[2] + eh[3] + eh[4] + eh[5] + eh[6];
@@ -1379,10 +1364,11 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		ehsum = (ehsum & 0xffff) + (ehsum >> 16);
 
 		/* Skip IP header; it's sum is always zero and was
-		   already filled in by ip_output.c */
+		 * already filled in by ip_output.c
+		 */
 		csum = csum_tcpudp_nofold(ih->saddr, ih->daddr,
-		                          ih->tot_len - (ih->ihl << 2),
-		                          proto, 0xffff ^ ehsum);
+					  ih->tot_len - (ih->ihl << 2),
+					  proto, 0xffff ^ ehsum);
 
 		csum = (csum & 0xffff) + (csum >> 16);	/* Fold again */
 		csum = (csum & 0xffff) + (csum >> 16);
@@ -1402,7 +1388,7 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	spin_lock_irq(&ip->ioc3_lock);
 
-	data = (unsigned long) skb->data;
+	data = (unsigned long)skb->data;
 	len = skb->len;
 
 	produce = ip->tx_pi;
@@ -1424,11 +1410,11 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		unsigned long s2 = data + len - b2;
 
 		desc->cmd    = cpu_to_be32(len | ETXD_INTWHENDONE |
-		                           ETXD_B1V | ETXD_B2V | w0);
+					   ETXD_B1V | ETXD_B2V | w0);
 		desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) |
-		                           (s2 << ETXD_B2CNT_SHIFT));
+					   (s2 << ETXD_B2CNT_SHIFT));
 		desc->p1     = cpu_to_be64(ioc3_map(skb->data, 1));
-		desc->p2     = cpu_to_be64(ioc3_map((void *) b2, 1));
+		desc->p2     = cpu_to_be64(ioc3_map((void *)b2, 1));
 	} else {
 		/* Normal sized packet that doesn't cross a page boundary. */
 		desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0);
@@ -1436,7 +1422,7 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		desc->p1     = cpu_to_be64(ioc3_map(skb->data, 1));
 	}
 
-	BARRIER();
+	mb(); /* make sure all descriptor changes are visible */
 
 	ip->tx_skbs[produce] = skb;			/* Remember skb */
 	produce = (produce + 1) & 127;
@@ -1457,7 +1443,7 @@ static void ioc3_timeout(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
 
-	printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
+	netdev_err(dev, "transmit timed out, resetting\n");
 
 	spin_lock_irq(&ip->ioc3_lock);
 
@@ -1471,16 +1457,14 @@ static void ioc3_timeout(struct net_device *dev)
 	netif_wake_queue(dev);
 }
 
-/*
- * Given a multicast ethernet address, this routine calculates the
+/* Given a multicast ethernet address, this routine calculates the
  * address's bit index in the logical address filter mask
  */
-
 static inline unsigned int ioc3_hash(const unsigned char *addr)
 {
 	unsigned int temp = 0;
-	u32 crc;
 	int bits;
+	u32 crc;
 
 	crc = ether_crc_le(ETH_ALEN, addr);
 
@@ -1494,8 +1478,8 @@ static inline unsigned int ioc3_hash(const unsigned char *addr)
 	return temp;
 }
 
-static void ioc3_get_drvinfo (struct net_device *dev,
-	struct ethtool_drvinfo *info)
+static void ioc3_get_drvinfo(struct net_device *dev,
+			     struct ethtool_drvinfo *info)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
 
@@ -1594,8 +1578,9 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 		if ((dev->flags & IFF_ALLMULTI) ||
 		    (netdev_mc_count(dev) > 64)) {
 			/* Too many for hashing to make sense or we want all
-			   multicast packets anyway,  so skip computing all the
-			   hashes and just accept all packets.  */
+			 * multicast packets anyway,  so skip computing all the
+			 * hashes and just accept all packets.
+			 */
 			ip->ehar_h = 0xffffffff;
 			ip->ehar_l = 0xffffffff;
 		} else {
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 09/17] net: sgi: ioc3-eth: use defines for constants dealing with desc rings
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (7 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 08/17] net: sgi: ioc3-eth: remove checkpatch errors/warning Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 23:53   ` Jakub Kicinski
  2019-08-19 16:31 ` [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling Thomas Bogendoerfer
                   ` (8 subsequent siblings)
  17 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Descriptor ring sizes of the IOC3 are more or less fixed size. To
make clearer where there is a relation to ring sizes use defines.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 42 +++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index e81e5bb37ac6..c875640926d6 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -61,10 +61,16 @@
 #include <asm/sn/ioc3.h>
 #include <asm/pci/bridge.h>
 
-/* 64 RX buffers.  This is tunable in the range of 16 <= x < 512.  The
- * value must be a power of two.
+/* Number of RX buffers.  This is tunable in the range of 16 <= x < 512.
+ * The value must be a power of two.
  */
-#define RX_BUFFS 64
+#define RX_BUFFS		64
+#define RX_RING_ENTRIES		512		/* fixed in hardware */
+#define RX_RING_MASK		(RX_RING_ENTRIES - 1)
+
+/* 128 TX buffers (not tunable) */
+#define TX_RING_ENTRIES		128
+#define TX_RING_MASK		(TX_RING_ENTRIES - 1)
 
 #define ETCSR_FD   ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
 #define ETCSR_HD   ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
@@ -76,8 +82,8 @@ struct ioc3_private {
 	u32 *ssram;
 	unsigned long *rxr;		/* pointer to receiver ring */
 	struct ioc3_etxd *txr;
-	struct sk_buff *rx_skbs[512];
-	struct sk_buff *tx_skbs[128];
+	struct sk_buff *rx_skbs[RX_RING_ENTRIES];
+	struct sk_buff *tx_skbs[TX_RING_ENTRIES];
 	int rx_ci;			/* RX consumer index */
 	int rx_pi;			/* RX producer index */
 	int tx_ci;			/* TX consumer index */
@@ -573,10 +579,10 @@ static inline void ioc3_rx(struct net_device *dev)
 		ip->rx_skbs[n_entry] = new_skb;
 		rxr[n_entry] = cpu_to_be64(ioc3_map(rxb, 1));
 		rxb->w0 = 0;				/* Clear valid flag */
-		n_entry = (n_entry + 1) & 511;		/* Update erpir */
+		n_entry = (n_entry + 1) & RX_RING_MASK;	/* Update erpir */
 
 		/* Now go on to the next ring entry.  */
-		rx_entry = (rx_entry + 1) & 511;
+		rx_entry = (rx_entry + 1) & RX_RING_MASK;
 		skb = ip->rx_skbs[rx_entry];
 		rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
 		w0 = be32_to_cpu(rxb->w0);
@@ -598,7 +604,7 @@ static inline void ioc3_tx(struct net_device *dev)
 	spin_lock(&ip->ioc3_lock);
 	etcir = readl(&regs->etcir);
 
-	tx_entry = (etcir >> 7) & 127;
+	tx_entry = (etcir >> 7) & TX_RING_MASK;
 	o_entry = ip->tx_ci;
 	packets = 0;
 	bytes = 0;
@@ -610,17 +616,17 @@ static inline void ioc3_tx(struct net_device *dev)
 		dev_consume_skb_irq(skb);
 		ip->tx_skbs[o_entry] = NULL;
 
-		o_entry = (o_entry + 1) & 127;		/* Next */
+		o_entry = (o_entry + 1) & TX_RING_MASK;	/* Next */
 
 		etcir = readl(&regs->etcir);		/* More pkts sent?  */
-		tx_entry = (etcir >> 7) & 127;
+		tx_entry = (etcir >> 7) & TX_RING_MASK;
 	}
 
 	dev->stats.tx_packets += packets;
 	dev->stats.tx_bytes += bytes;
 	ip->txqlen -= packets;
 
-	if (ip->txqlen < 128)
+	if (netif_queue_stopped(dev) && ip->txqlen < TX_RING_ENTRIES)
 		netif_wake_queue(dev);
 
 	ip->tx_ci = o_entry;
@@ -765,10 +771,10 @@ static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
 		ip->rx_skbs[ip->rx_pi] = ip->rx_skbs[ip->rx_ci];
 		ip->rxr[ip->rx_pi++] = ip->rxr[ip->rx_ci++];
 	}
-	ip->rx_pi &= 511;
-	ip->rx_ci &= 511;
+	ip->rx_pi &= RX_RING_MASK;
+	ip->rx_ci &= RX_RING_MASK;
 
-	for (i = ip->rx_ci; i != ip->rx_pi; i = (i + 1) & 511) {
+	for (i = ip->rx_ci; i != ip->rx_pi; i = (i + 1) & RX_RING_MASK) {
 		skb = ip->rx_skbs[i];
 		rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
 		rxb->w0 = 0;
@@ -780,7 +786,7 @@ static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
 	struct sk_buff *skb;
 	int i;
 
-	for (i = 0; i < 128; i++) {
+	for (i = 0; i < TX_RING_ENTRIES; i++) {
 		skb = ip->tx_skbs[i];
 		if (skb) {
 			ip->tx_skbs[i] = NULL;
@@ -812,7 +818,7 @@ static void ioc3_free_rings(struct ioc3_private *ip)
 			if (skb)
 				dev_kfree_skb_any(skb);
 
-			n_entry = (n_entry + 1) & 511;
+			n_entry = (n_entry + 1) & RX_RING_MASK;
 		}
 		free_page((unsigned long)ip->rxr);
 		ip->rxr = NULL;
@@ -1425,13 +1431,13 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	mb(); /* make sure all descriptor changes are visible */
 
 	ip->tx_skbs[produce] = skb;			/* Remember skb */
-	produce = (produce + 1) & 127;
+	produce = (produce + 1) & TX_RING_MASK;
 	ip->tx_pi = produce;
 	writel(produce << 7, &ip->regs->etpir);		/* Fire ... */
 
 	ip->txqlen++;
 
-	if (ip->txqlen >= 127)
+	if (ip->txqlen >= (TX_RING_ENTRIES - 1))
 		netif_stop_queue(dev);
 
 	spin_unlock_irq(&ip->ioc3_lock);
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (8 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 09/17] net: sgi: ioc3-eth: use defines for constants dealing with desc rings Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 23:55   ` Jakub Kicinski
  2019-08-19 16:31 ` [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list Thomas Bogendoerfer
                   ` (7 subsequent siblings)
  17 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Buffers alloacted by alloc_skb() are already cache aligned so there
is no need for an extra align done by ioc3_alloc_skb. And instead
of skb_put/skb_trim simply use one skb_put after frame size is known
during receive.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 50 ++++++++-----------------------------
 1 file changed, 11 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index c875640926d6..d862f28887f9 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -11,7 +11,6 @@
  *
  * To do:
  *
- *  o Handle allocation failures in ioc3_alloc_skb() more gracefully.
  *  o Handle allocation failures in ioc3_init_rings().
  *  o Use prefetching for large packets.  What is a good lower limit for
  *    prefetching?
@@ -72,6 +71,12 @@
 #define TX_RING_ENTRIES		128
 #define TX_RING_MASK		(TX_RING_ENTRIES - 1)
 
+/* BEWARE: The IOC3 documentation documents the size of rx buffers as
+ * 1644 while it's actually 1664.  This one was nasty to track down...
+ */
+#define RX_OFFSET		10
+#define RX_BUF_SIZE		1664
+
 #define ETCSR_FD   ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
 #define ETCSR_HD   ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
 
@@ -111,31 +116,6 @@ static void ioc3_init(struct net_device *dev);
 static const char ioc3_str[] = "IOC3 Ethernet";
 static const struct ethtool_ops ioc3_ethtool_ops;
 
-/* We use this to acquire receive skb's that we can DMA directly into. */
-
-#define IOC3_CACHELINE	128UL
-
-static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
-{
-	return (~addr + 1) & (IOC3_CACHELINE - 1UL);
-}
-
-static inline struct sk_buff *ioc3_alloc_skb(unsigned long length,
-					     unsigned int gfp_mask)
-{
-	struct sk_buff *skb;
-
-	skb = alloc_skb(length + IOC3_CACHELINE - 1, gfp_mask);
-	if (likely(skb)) {
-		int offset = aligned_rx_skb_addr((unsigned long)skb->data);
-
-		if (offset)
-			skb_reserve(skb, offset);
-	}
-
-	return skb;
-}
-
 static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
 {
 #ifdef CONFIG_SGI_IP27
@@ -148,12 +128,6 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
 #endif
 }
 
-/* BEWARE: The IOC3 documentation documents the size of rx buffers as
- * 1644 while it's actually 1664.  This one was nasty to track down ...
- */
-#define RX_OFFSET		10
-#define RX_BUF_ALLOC_SIZE	(1664 + RX_OFFSET + IOC3_CACHELINE)
-
 #define IOC3_SIZE 0x100000
 
 static inline u32 mcr_pack(u32 pulse, u32 sample)
@@ -534,10 +508,10 @@ static inline void ioc3_rx(struct net_device *dev)
 		err = be32_to_cpu(rxb->err);		/* It's valid ...  */
 		if (err & ERXBUF_GOODPKT) {
 			len = ((w0 >> ERXBUF_BYTECNT_SHIFT) & 0x7ff) - 4;
-			skb_trim(skb, len);
+			skb_put(skb, len);
 			skb->protocol = eth_type_trans(skb, dev);
 
-			new_skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
+			new_skb = alloc_skb(RX_BUF_SIZE, GFP_ATOMIC);
 			if (!new_skb) {
 				/* Ouch, drop packet and just recycle packet
 				 * to keep the ring filled.
@@ -546,6 +520,7 @@ static inline void ioc3_rx(struct net_device *dev)
 				new_skb = skb;
 				goto next;
 			}
+			new_skb->dev = dev;
 
 			if (likely(dev->features & NETIF_F_RXCSUM))
 				ioc3_tcpudp_checksum(skb,
@@ -556,8 +531,6 @@ static inline void ioc3_rx(struct net_device *dev)
 
 			ip->rx_skbs[rx_entry] = NULL;	/* Poison  */
 
-			/* Because we reserve afterwards. */
-			skb_put(new_skb, (1664 + RX_OFFSET));
 			rxb = (struct ioc3_erxbuf *)new_skb->data;
 			skb_reserve(new_skb, RX_OFFSET);
 
@@ -846,16 +819,15 @@ static void ioc3_alloc_rings(struct net_device *dev)
 		for (i = 0; i < RX_BUFFS; i++) {
 			struct sk_buff *skb;
 
-			skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
+			skb = alloc_skb(RX_BUF_SIZE, GFP_ATOMIC);
 			if (!skb) {
 				show_free_areas(0, NULL);
 				continue;
 			}
+			skb->dev = dev;
 
 			ip->rx_skbs[i] = skb;
 
-			/* Because we reserve afterwards. */
-			skb_put(skb, (1664 + RX_OFFSET));
 			rxb = (struct ioc3_erxbuf *)skb->data;
 			rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
 			skb_reserve(skb, RX_OFFSET);
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (9 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-20  0:04   ` Jakub Kicinski
  2019-08-19 16:31 ` [PATCH v5 12/17] net: sgi: ioc3-eth: use dma-direct for dma allocations Thomas Bogendoerfer
                   ` (6 subsequent siblings)
  17 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

netif_stop_queue()/netif_wake_qeue() aren't needed for changing
multicast filters. Use spinlocks instead for proper protection
of private struct.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index d862f28887f9..7f85a3bfef14 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1542,8 +1542,7 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 	struct netdev_hw_addr *ha;
 	u64 ehar = 0;
 
-	netif_stop_queue(dev);				/* Lock out others. */
-
+	spin_lock_irq(&ip->ioc3_lock);
 	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous.  */
 		ip->emcr |= EMCR_PROMISC;
 		writel(ip->emcr, &regs->emcr);
@@ -1572,7 +1571,7 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 		writel(ip->ehar_l, &regs->ehar_l);
 	}
 
-	netif_wake_queue(dev);			/* Let us get going again. */
+	spin_unlock_irq(&ip->ioc3_lock);
 }
 
 module_pci_driver(ioc3_driver);
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 12/17] net: sgi: ioc3-eth: use dma-direct for dma allocations
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (10 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-20  0:07   ` Jakub Kicinski
  2019-08-19 16:31 ` [PATCH v5 13/17] net: sgi: ioc3-eth: use csum_fold Thomas Bogendoerfer
                   ` (5 subsequent siblings)
  17 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Replace the homegrown DMA memory allocation, which only works on
SGI-IP27 machines, with the generic dma allocations.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 107 ++++++++++++++++++++++++++----------
 1 file changed, 77 insertions(+), 30 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 7f85a3bfef14..647e3926bd71 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -38,7 +38,6 @@
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/udp.h>
-#include <linux/dma-mapping.h>
 #include <linux/gfp.h>
 
 #ifdef CONFIG_SERIAL_8250
@@ -51,6 +50,8 @@
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/skbuff.h>
+#include <linux/dma-direct.h>
+
 #include <net/ip.h>
 
 #include <asm/byteorder.h>
@@ -66,10 +67,12 @@
 #define RX_BUFFS		64
 #define RX_RING_ENTRIES		512		/* fixed in hardware */
 #define RX_RING_MASK		(RX_RING_ENTRIES - 1)
+#define RX_RING_SIZE		(RX_RING_ENTRIES * sizeof(u64))
 
 /* 128 TX buffers (not tunable) */
 #define TX_RING_ENTRIES		128
 #define TX_RING_MASK		(TX_RING_ENTRIES - 1)
+#define TX_RING_SIZE		(TX_RING_ENTRIES * sizeof(struct ioc3_etxd))
 
 /* BEWARE: The IOC3 documentation documents the size of rx buffers as
  * 1644 while it's actually 1664.  This one was nasty to track down...
@@ -84,9 +87,12 @@
 struct ioc3_private {
 	struct ioc3_ethregs *regs;
 	struct ioc3 *all_regs;
+	struct device *dma_dev;
 	u32 *ssram;
 	unsigned long *rxr;		/* pointer to receiver ring */
 	struct ioc3_etxd *txr;
+	dma_addr_t rxr_dma;
+	dma_addr_t txr_dma;
 	struct sk_buff *rx_skbs[RX_RING_ENTRIES];
 	struct sk_buff *tx_skbs[TX_RING_ENTRIES];
 	int rx_ci;			/* RX consumer index */
@@ -116,18 +122,22 @@ static void ioc3_init(struct net_device *dev);
 static const char ioc3_str[] = "IOC3 Ethernet";
 static const struct ethtool_ops ioc3_ethtool_ops;
 
-static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
+#ifdef CONFIG_PCI_XTALK_BRIDGE
+static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr)
 {
-#ifdef CONFIG_SGI_IP27
-	vdev <<= 57;   /* Shift to PCI64_ATTR_VIRTUAL */
+	return (addr & ~PCI64_ATTR_BAR) | attr;
+}
 
-	return vdev | (0xaUL << PCI64_ATTR_TARG_SHFT) | PCI64_ATTR_PREF |
-	       ((unsigned long)ptr & TO_PHYS_MASK);
+#define ERBAR_VAL	(ERBAR_BARRIER_BIT << ERBAR_RXBARR_SHIFT)
 #else
-	return virt_to_bus(ptr);
-#endif
+static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr)
+{
+	return addr;
 }
 
+#define ERBAR_VAL	0
+#endif
+
 #define IOC3_SIZE 0x100000
 
 static inline u32 mcr_pack(u32 pulse, u32 sample)
@@ -494,6 +504,7 @@ static inline void ioc3_rx(struct net_device *dev)
 	int rx_entry, n_entry, len;
 	struct ioc3_erxbuf *rxb;
 	unsigned long *rxr;
+	dma_addr_t d;
 	u32 w0, err;
 
 	rxr = ip->rxr;		/* Ring base */
@@ -550,7 +561,9 @@ static inline void ioc3_rx(struct net_device *dev)
 			dev->stats.rx_frame_errors++;
 next:
 		ip->rx_skbs[n_entry] = new_skb;
-		rxr[n_entry] = cpu_to_be64(ioc3_map(rxb, 1));
+		d = dma_map_single(ip->dma_dev, rxb, RX_BUF_SIZE,
+				   DMA_FROM_DEVICE);
+		rxr[n_entry] = cpu_to_be64(ioc3_map(d, PCI64_ATTR_BAR));
 		rxb->w0 = 0;				/* Clear valid flag */
 		n_entry = (n_entry + 1) & RX_RING_MASK;	/* Update erpir */
 
@@ -754,6 +767,26 @@ static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
 	}
 }
 
+static inline void ioc3_tx_unmap(struct ioc3_private *ip, int entry)
+{
+	struct ioc3_etxd *desc;
+	u32 cmd, bufcnt, len;
+
+	desc = &ip->txr[entry];
+	cmd = be32_to_cpu(desc->cmd);
+	bufcnt = be32_to_cpu(desc->bufcnt);
+	if (cmd & ETXD_B1V) {
+		len = (bufcnt & ETXD_B1CNT_MASK) >> ETXD_B1CNT_SHIFT;
+		dma_unmap_single(ip->dma_dev, be64_to_cpu(desc->p1),
+				 len, DMA_TO_DEVICE);
+	}
+	if (cmd & ETXD_B2V) {
+		len = (bufcnt & ETXD_B2CNT_MASK) >> ETXD_B2CNT_SHIFT;
+		dma_unmap_single(ip->dma_dev, be64_to_cpu(desc->p2),
+				 len, DMA_TO_DEVICE);
+	}
+}
+
 static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
 {
 	struct sk_buff *skb;
@@ -762,6 +795,7 @@ static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
 	for (i = 0; i < TX_RING_ENTRIES; i++) {
 		skb = ip->tx_skbs[i];
 		if (skb) {
+			ioc3_tx_unmap(ip, i);
 			ip->tx_skbs[i] = NULL;
 			dev_kfree_skb_any(skb);
 		}
@@ -778,7 +812,8 @@ static void ioc3_free_rings(struct ioc3_private *ip)
 
 	if (ip->txr) {
 		ioc3_clean_tx_ring(ip);
-		free_pages((unsigned long)ip->txr, 2);
+		dma_direct_free_pages(ip->dma_dev, TX_RING_SIZE, ip->txr,
+				      ip->txr_dma, 0);
 		ip->txr = NULL;
 	}
 
@@ -788,12 +823,17 @@ static void ioc3_free_rings(struct ioc3_private *ip)
 
 		while (n_entry != rx_entry) {
 			skb = ip->rx_skbs[n_entry];
-			if (skb)
+			if (skb) {
+				dma_unmap_single(ip->dma_dev,
+						 be64_to_cpu(ip->rxr[n_entry]),
+						 RX_BUF_SIZE, DMA_FROM_DEVICE);
 				dev_kfree_skb_any(skb);
+			}
 
 			n_entry = (n_entry + 1) & RX_RING_MASK;
 		}
-		free_page((unsigned long)ip->rxr);
+		dma_direct_free_pages(ip->dma_dev, RX_RING_SIZE, ip->rxr,
+				      ip->rxr_dma, 0);
 		ip->rxr = NULL;
 	}
 }
@@ -801,16 +841,19 @@ static void ioc3_free_rings(struct ioc3_private *ip)
 static void ioc3_alloc_rings(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
-	struct ioc3_erxbuf *rxb;
 	unsigned long *rxr;
+	dma_addr_t rxb;
 	int i;
 
 	if (!ip->rxr) {
 		/* Allocate and initialize rx ring.  4kb = 512 entries  */
-		ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC);
+		ip->rxr = dma_direct_alloc_pages(ip->dma_dev, RX_RING_SIZE,
+						 &ip->rxr_dma, GFP_ATOMIC, 0);
 		rxr = ip->rxr;
-		if (!rxr)
+		if (!rxr) {
 			pr_err("%s: get_zeroed_page() failed!\n", __func__);
+			return;
+		}
 
 		/* Now the rx buffers.  The RX ring may be larger but
 		 * we only allocate 16 buffers for now.  Need to tune
@@ -828,8 +871,9 @@ static void ioc3_alloc_rings(struct net_device *dev)
 
 			ip->rx_skbs[i] = skb;
 
-			rxb = (struct ioc3_erxbuf *)skb->data;
-			rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
+			rxb = dma_map_single(ip->dma_dev, skb->data,
+					     RX_BUF_SIZE, DMA_BIDIRECTIONAL);
+			rxr[i] = cpu_to_be64(ioc3_map(rxb, PCI64_ATTR_BAR));
 			skb_reserve(skb, RX_OFFSET);
 		}
 		ip->rx_ci = 0;
@@ -838,7 +882,9 @@ static void ioc3_alloc_rings(struct net_device *dev)
 
 	if (!ip->txr) {
 		/* Allocate and initialize tx rings.  16kb = 128 bufs.  */
-		ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2);
+		ip->txr = dma_direct_alloc_pages(ip->dma_dev, TX_RING_SIZE,
+						 &ip->txr_dma,
+						 GFP_KERNEL | __GFP_ZERO, 0);
 		if (!ip->txr)
 			pr_err("%s: __get_free_pages() failed!\n", __func__);
 		ip->tx_pi = 0;
@@ -859,13 +905,13 @@ static void ioc3_init_rings(struct net_device *dev)
 	ioc3_clean_tx_ring(ip);
 
 	/* Now the rx ring base, consume & produce registers.  */
-	ring = ioc3_map(ip->rxr, 0);
+	ring = ioc3_map(ip->rxr_dma, PCI64_ATTR_PREC);
 	writel(ring >> 32, &regs->erbr_h);
 	writel(ring & 0xffffffff, &regs->erbr_l);
 	writel(ip->rx_ci << 3, &regs->ercir);
 	writel((ip->rx_pi << 3) | ERPIR_ARM, &regs->erpir);
 
-	ring = ioc3_map(ip->txr, 0);
+	ring = ioc3_map(ip->txr_dma, PCI64_ATTR_PREC);
 
 	ip->txqlen = 0;					/* nothing queued  */
 
@@ -915,13 +961,7 @@ static void ioc3_init(struct net_device *dev)
 	readl(&regs->emcr);
 
 	/* Misc registers  */
-#ifdef CONFIG_SGI_IP27
-	/* Barrier on last store */
-	writel(PCI64_ATTR_BAR >> 32, &regs->erbar);
-#else
-	/* Let PCI API get it right */
-	writel(0, &regs->erbar);
-#endif
+	writel(ERBAR_VAL, &regs->erbar);
 	readl(&regs->etcdc);			/* Clear on read */
 	writel(15, &regs->ercsr);		/* RX low watermark  */
 	writel(0, &regs->ertr);			/* Interrupt immediately */
@@ -1187,6 +1227,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	ip = netdev_priv(dev);
 	ip->dev = dev;
+	ip->dma_dev = &pdev->dev;
 
 	dev->irq = pdev->irq;
 
@@ -1386,18 +1427,24 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		unsigned long b2 = (data | 0x3fffUL) + 1UL;
 		unsigned long s1 = b2 - data;
 		unsigned long s2 = data + len - b2;
+		dma_addr_t d;
 
 		desc->cmd    = cpu_to_be32(len | ETXD_INTWHENDONE |
 					   ETXD_B1V | ETXD_B2V | w0);
 		desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) |
 					   (s2 << ETXD_B2CNT_SHIFT));
-		desc->p1     = cpu_to_be64(ioc3_map(skb->data, 1));
-		desc->p2     = cpu_to_be64(ioc3_map((void *)b2, 1));
+		d = dma_map_single(ip->dma_dev, skb->data, s1, DMA_TO_DEVICE);
+		desc->p1     = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF));
+		d = dma_map_single(ip->dma_dev, (void *)b2, s1, DMA_TO_DEVICE);
+		desc->p2     = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF));
 	} else {
+		dma_addr_t d;
+
 		/* Normal sized packet that doesn't cross a page boundary. */
 		desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0);
 		desc->bufcnt = cpu_to_be32(len << ETXD_B1CNT_SHIFT);
-		desc->p1     = cpu_to_be64(ioc3_map(skb->data, 1));
+		d = dma_map_single(ip->dma_dev, skb->data, len, DMA_TO_DEVICE);
+		desc->p1     = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF));
 	}
 
 	mb(); /* make sure all descriptor changes are visible */
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 13/17] net: sgi: ioc3-eth: use csum_fold
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (11 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 12/17] net: sgi: ioc3-eth: use dma-direct for dma allocations Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 14/17] net: sgi: ioc3-eth: Fix IPG settings Thomas Bogendoerfer
                   ` (4 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

replace open coded checksum folding by csum_fold.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 647e3926bd71..56392f0b01de 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1378,16 +1378,12 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		/* Sum up dest addr, src addr and protocol  */
 		ehsum = eh[0] + eh[1] + eh[2] + eh[3] + eh[4] + eh[5] + eh[6];
 
-		/* Fold ehsum.  can't use csum_fold which negates also ...  */
-		ehsum = (ehsum & 0xffff) + (ehsum >> 16);
-		ehsum = (ehsum & 0xffff) + (ehsum >> 16);
-
 		/* Skip IP header; it's sum is always zero and was
 		 * already filled in by ip_output.c
 		 */
 		csum = csum_tcpudp_nofold(ih->saddr, ih->daddr,
 					  ih->tot_len - (ih->ihl << 2),
-					  proto, 0xffff ^ ehsum);
+					  proto, csum_fold(ehsum));
 
 		csum = (csum & 0xffff) + (csum >> 16);	/* Fold again */
 		csum = (csum & 0xffff) + (csum >> 16);
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 14/17] net: sgi: ioc3-eth: Fix IPG settings
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (12 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 13/17] net: sgi: ioc3-eth: use csum_fold Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip Thomas Bogendoerfer
                   ` (3 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

The half/full duplex settings for inter packet gap counters/timer were
reversed.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 56392f0b01de..25597c6194d9 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -80,8 +80,8 @@
 #define RX_OFFSET		10
 #define RX_BUF_SIZE		1664
 
-#define ETCSR_FD   ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
-#define ETCSR_HD   ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_FD   ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_HD   ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
 
 /* Private per NIC data of the driver.  */
 struct ioc3_private {
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (13 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 14/17] net: sgi: ioc3-eth: Fix IPG settings Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-20  6:23   ` Alexandre Belloni
  2019-08-19 16:31 ` [PATCH v5 16/17] MIPS: SGI-IP27: fix readb/writeb addressing Thomas Bogendoerfer
                   ` (2 subsequent siblings)
  17 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

SGI IOC3 chip has integrated ethernet, keyboard and mouse interface.
It also supports connecting a SuperIO chip for serial and parallel
interfaces. IOC3 is used inside various SGI systemboards and add-on
cards with different equipped external interfaces.

Support for ethernet and serial interfaces were implemented inside
the network driver. This patchset moves out the not network related
parts to a new MFD driver, which takes care of card detection,
setup of platform devices and interrupt distribution for the subdevices.

Serial portion: Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 arch/mips/sgi-ip27/ip27-timer.c     |  20 -
 drivers/mfd/Kconfig                 |  13 +
 drivers/mfd/Makefile                |   1 +
 drivers/mfd/ioc3.c                  | 586 +++++++++++++++++++++++++++
 drivers/net/ethernet/sgi/Kconfig    |   4 +-
 drivers/net/ethernet/sgi/ioc3-eth.c | 782 +++++++++---------------------------
 drivers/tty/serial/8250/8250_ioc3.c |  98 +++++
 drivers/tty/serial/8250/Kconfig     |  11 +
 drivers/tty/serial/8250/Makefile    |   1 +
 9 files changed, 913 insertions(+), 603 deletions(-)
 create mode 100644 drivers/mfd/ioc3.c
 create mode 100644 drivers/tty/serial/8250/8250_ioc3.c

diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index 9b4b9ac621a3..5631e93ea350 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -188,23 +188,3 @@ void hub_rtc_init(cnodeid_t cnode)
 		LOCAL_HUB_S(PI_RT_PEND_B, 0);
 	}
 }
-
-static int __init sgi_ip27_rtc_devinit(void)
-{
-	struct resource res;
-
-	memset(&res, 0, sizeof(res));
-	res.start = XPHYSADDR(KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base +
-			      IOC3_BYTEBUS_DEV0);
-	res.end = res.start + 32767;
-	res.flags = IORESOURCE_MEM;
-
-	return IS_ERR(platform_device_register_simple("rtc-m48t35", -1,
-						      &res, 1));
-}
-
-/*
- * kludge make this a device_initcall after ioc3 resource conflicts
- * are resolved
- */
-late_initcall(sgi_ip27_rtc_devinit);
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f129f9678940..6d3908267a6a 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2019,5 +2019,18 @@ config RAVE_SP_CORE
 	  Select this to get support for the Supervisory Processor
 	  device found on several devices in RAVE line of hardware.
 
+config SGI_MFD_IOC3
+	tristate "SGI IOC3 core driver"
+	depends on PCI && MIPS
+	select MFD_CORE
+	help
+	  This option enables basic support for the SGI IOC3-based
+	  controller cards.  This option does not enable any specific
+	  functions on such a card, but provides necessary infrastructure
+	  for other drivers to utilize.
+
+	  If you have an SGI Origin, Octane, or a PCI IOC3 card,
+	  then say Y. Otherwise say N.
+
 endmenu
 endif
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f026ada68f6a..fb523eaa358a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -257,3 +257,4 @@ obj-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o
 
+obj-$(CONFIG_SGI_MFD_IOC3)	+= ioc3.o
diff --git a/drivers/mfd/ioc3.c b/drivers/mfd/ioc3.c
new file mode 100644
index 000000000000..5bcb3461a189
--- /dev/null
+++ b/drivers/mfd/ioc3.c
@@ -0,0 +1,586 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SGI IOC3 multifunction device driver
+ *
+ * Copyright (C) 2018, 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de>
+ *
+ * Based on work by:
+ *   Stanislaw Skowronek <skylark@unaligned.org>
+ *   Joshua Kinard <kumba@gentoo.org>
+ *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
+ *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
+ */
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/sgi-w1.h>
+#include <linux/rtc/ds1685.h>
+
+#include <asm/pci/bridge.h>
+#include <asm/sn/ioc3.h>
+
+#define IOC3_IRQ_SERIAL_A	6
+#define IOC3_IRQ_SERIAL_B	15
+#define IOC3_IRQ_KBD		22
+#define IOC3_IRQ_ETH_DOMAIN	23
+
+/* Bitmask for selecting which IRQs are level triggered */
+#define IOC3_LVL_MASK	(BIT(IOC3_IRQ_SERIAL_A) | BIT(IOC3_IRQ_SERIAL_B))
+
+#define M48T35_REG_SIZE	32768	/* size of m48t35 registers */
+
+/* 1.2 us latency timer (40 cycles at 33 MHz) */
+#define IOC3_LATENCY	40
+
+struct ioc3_priv_data {
+	struct irq_domain *domain;
+	struct ioc3 __iomem *regs;
+	struct pci_dev *pdev;
+	int domain_irq;
+};
+
+static void ioc3_irq_ack(struct irq_data *d)
+{
+	struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
+
+	writel(BIT(hwirq), &ipd->regs->sio_ir);
+}
+
+static void ioc3_irq_mask(struct irq_data *d)
+{
+	struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
+
+	writel(BIT(hwirq), &ipd->regs->sio_iec);
+}
+
+static void ioc3_irq_unmask(struct irq_data *d)
+{
+	struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
+
+	writel(BIT(hwirq), &ipd->regs->sio_ies);
+}
+
+static struct irq_chip ioc3_irq_chip = {
+	.name		= "IOC3",
+	.irq_ack	= ioc3_irq_ack,
+	.irq_mask	= ioc3_irq_mask,
+	.irq_unmask	= ioc3_irq_unmask,
+};
+
+static int ioc3_irq_domain_map(struct irq_domain *d, unsigned int irq,
+			      irq_hw_number_t hwirq)
+{
+	/* Set level IRQs for every interrupt contained in IOC3_LVL_MASK */
+	if (BIT(hwirq) & IOC3_LVL_MASK)
+		irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_level_irq);
+	else
+		irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_edge_irq);
+
+	irq_set_chip_data(irq, d->host_data);
+	return 0;
+}
+
+static const struct irq_domain_ops ioc3_irq_domain_ops = {
+	.map = ioc3_irq_domain_map,
+};
+
+static void ioc3_irq_handler(struct irq_desc *desc)
+{
+	struct irq_domain *domain = irq_desc_get_handler_data(desc);
+	struct ioc3_priv_data *ipd = domain->host_data;
+	struct ioc3 __iomem *regs = ipd->regs;
+	u32 pending, mask;
+	unsigned int irq;
+
+	pending = readl(&regs->sio_ir);
+	mask = readl(&regs->sio_ies);
+	pending &= mask; /* mask off not enabled but pending irqs */
+
+	if (mask & BIT(IOC3_IRQ_ETH_DOMAIN))
+		/* if eth irq is enabled we need to check in eth irq regs */
+		if (readl(&regs->eth.eisr) & readl(&regs->eth.eier))
+			pending |= IOC3_IRQ_ETH_DOMAIN;
+
+	if (pending) {
+		irq = irq_find_mapping(domain, __ffs(pending));
+		if (irq)
+			generic_handle_irq(irq);
+	} else  {
+		spurious_interrupt();
+	}
+}
+
+/*
+ * System boards/BaseIOs use more interrupt pins of the bridge ASIC
+ * to which the IOC3 is connected. Since the IOC3 MFD driver
+ * knows wiring of these extra pins, we use the map_irq function
+ * to get interrupts activated
+ */
+static int ioc3_map_irq(struct pci_dev *pdev, int pin)
+{
+	struct pci_host_bridge *hbrg = pci_find_host_bridge(pdev->bus);
+
+	return hbrg->map_irq(pdev, pin, 0);
+}
+
+static int ioc3_irq_domain_setup(struct ioc3_priv_data *ipd, int irq)
+{
+	struct irq_domain *domain;
+	struct fwnode_handle *fn;
+
+	fn = irq_domain_alloc_named_fwnode("IOC3");
+	if (!fn)
+		goto err;
+
+	domain = irq_domain_create_linear(fn, 24, &ioc3_irq_domain_ops, ipd);
+	if (!domain)
+		goto err;
+
+	irq_domain_free_fwnode(fn);
+	ipd->domain = domain;
+
+	irq_set_chained_handler_and_data(irq, ioc3_irq_handler, domain);
+	ipd->domain_irq = irq;
+	return 0;
+
+err:
+	dev_err(&ipd->pdev->dev, "irq domain setup failed\n");
+	return -ENOMEM;
+}
+
+static struct resource ioc3_uarta_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uarta),
+		       sizeof_field(struct ioc3, sregs.uarta)),
+	DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_A)
+};
+
+static struct resource ioc3_uartb_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uartb),
+		       sizeof_field(struct ioc3, sregs.uartb)),
+	DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_B)
+};
+
+static struct mfd_cell ioc3_serial_cells[] = {
+	{
+		.name = "ioc3-serial8250",
+		.resources = ioc3_uarta_resources,
+		.num_resources = ARRAY_SIZE(ioc3_uarta_resources),
+	},
+	{
+		.name = "ioc3-serial8250",
+		.resources = ioc3_uartb_resources,
+		.num_resources = ARRAY_SIZE(ioc3_uartb_resources),
+	}
+};
+
+static int ioc3_serial_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	/* set gpio pins for RS232/RS422 mode selection */
+	writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL,
+		&ipd->regs->gpcr_s);
+	/* select RS232 mode for uart a */
+	writel(0, &ipd->regs->gppr[6]);
+	/* select RS232 mode for uart b */
+	writel(0, &ipd->regs->gppr[7]);
+
+	/* switch both ports to 16650 mode */
+	writel(readl(&ipd->regs->port_a.sscr) & ~SSCR_DMA_EN,
+	       &ipd->regs->port_a.sscr);
+	writel(readl(&ipd->regs->port_b.sscr) & ~SSCR_DMA_EN,
+	       &ipd->regs->port_b.sscr);
+	udelay(1000); /* wait until mode switch is done */
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_serial_cells, ARRAY_SIZE(ioc3_serial_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret) {
+		dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct resource ioc3_kbd_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, serio),
+		       sizeof_field(struct ioc3, serio)),
+	DEFINE_RES_IRQ(IOC3_IRQ_KBD)
+};
+
+static struct mfd_cell ioc3_kbd_cells[] = {
+	{
+		.name = "ioc3-kbd",
+		.resources = ioc3_kbd_resources,
+		.num_resources = ARRAY_SIZE(ioc3_kbd_resources),
+	}
+};
+
+static int ioc3_kbd_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_kbd_cells, ARRAY_SIZE(ioc3_kbd_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret) {
+		dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct resource ioc3_eth_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, eth),
+		       sizeof_field(struct ioc3, eth)),
+	DEFINE_RES_MEM(offsetof(struct ioc3, ssram),
+		       sizeof_field(struct ioc3, ssram)),
+	DEFINE_RES_IRQ(0)
+};
+
+static struct resource ioc3_w1_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, mcr),
+		       sizeof_field(struct ioc3, mcr)),
+};
+static struct sgi_w1_platform_data ioc3_w1_platform_data;
+
+static struct mfd_cell ioc3_eth_cells[] = {
+	{
+		.name = "ioc3-eth",
+		.resources = ioc3_eth_resources,
+		.num_resources = ARRAY_SIZE(ioc3_eth_resources),
+	},
+	{
+		.name = "sgi_w1",
+		.resources = ioc3_w1_resources,
+		.num_resources = ARRAY_SIZE(ioc3_w1_resources),
+		.platform_data = &ioc3_w1_platform_data,
+		.pdata_size = sizeof(ioc3_w1_platform_data),
+	}
+};
+
+static int ioc3_eth_setup(struct ioc3_priv_data *ipd, bool use_domain)
+{
+	int irq = ipd->pdev->irq;
+	int ret;
+
+	/* enable One-Wire bus */
+	writel(GPCR_MLAN_EN, &ipd->regs->gpcr_s);
+
+	/* generate unique identifier */
+	snprintf(ioc3_w1_platform_data.dev_id,
+		 sizeof(ioc3_w1_platform_data.dev_id), "ioc3-%012llx",
+		 ipd->pdev->resource->start);
+
+	if (use_domain)
+		irq = irq_create_mapping(ipd->domain, IOC3_IRQ_ETH_DOMAIN);
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_eth_cells, ARRAY_SIZE(ioc3_eth_cells),
+			      &ipd->pdev->resource[0], irq, NULL);
+	if (ret) {
+		dev_err(&ipd->pdev->dev, "Failed to add ETH/W1 subdev\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct resource ioc3_m48t35_resources[] = {
+	DEFINE_RES_MEM(IOC3_BYTEBUS_DEV0, M48T35_REG_SIZE)
+};
+
+static struct mfd_cell ioc3_m48t35_cells[] = {
+	{
+		.name = "rtc-m48t35",
+		.resources = ioc3_m48t35_resources,
+		.num_resources = ARRAY_SIZE(ioc3_m48t35_resources),
+	}
+};
+
+static int ioc3_m48t35_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_m48t35_cells, ARRAY_SIZE(ioc3_m48t35_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret)
+		dev_err(&ipd->pdev->dev, "Failed to add M48T35 subdev\n");
+
+	return ret;
+}
+
+static int ip27_baseio_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn) + 2);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd, false);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_m48t35_setup(ipd);
+}
+
+static int ip27_baseio6g_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn) + 2);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd, false);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_m48t35_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+static int ip27_mio_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = ioc3_irq_domain_setup(ipd, ipd->pdev->irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+static int ip29_sysboard_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn) + 1);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd, false);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_m48t35_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+static int ioc3_menet_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn) + 4);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd, false);
+	if (ret)
+		return ret;
+
+	return ioc3_serial_setup(ipd);
+}
+
+static int ioc3_menet4_setup(struct ioc3_priv_data *ipd)
+{
+	return ioc3_eth_setup(ipd, false);
+}
+
+static int ioc3_cad_duo_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = ioc3_irq_domain_setup(ipd, ipd->pdev->irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd, true);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+/* Helper macro for filling ioc3_info array */
+#define IOC3_SID(_name, _sid, _setup) \
+	{								   \
+		.name = _name,						   \
+		.sid = (PCI_VENDOR_ID_SGI << 16) | IOC3_SUBSYS_ ## _sid,   \
+		.setup = _setup,					   \
+	}
+
+static struct {
+	const char *name;
+	u32 sid;
+	int (*setup)(struct ioc3_priv_data *ipd);
+} ioc3_infos[] = {
+	IOC3_SID("IP27 BaseIO6G", IP27_BASEIO6G, &ip27_baseio6g_setup),
+	IOC3_SID("IP27 MIO", IP27_MIO, &ip27_mio_setup),
+	IOC3_SID("IP27 BaseIO", IP27_BASEIO, &ip27_baseio_setup),
+	IOC3_SID("IP29 System Board", IP29_SYSBOARD, &ip29_sysboard_setup),
+	IOC3_SID("MENET", MENET, &ioc3_menet_setup),
+	IOC3_SID("MENET4", MENET4, &ioc3_menet4_setup)
+};
+#undef IOC3_SID
+
+static int ioc3_setup(struct ioc3_priv_data *ipd)
+{
+	u32 sid;
+	int i;
+
+	/* Clear IRQs */
+	writel(~0, &ipd->regs->sio_iec);
+	writel(~0, &ipd->regs->sio_ir);
+	writel(0, &ipd->regs->eth.eier);
+	writel(~0, &ipd->regs->eth.eisr);
+
+	/* read subsystem vendor id and subsystem id */
+	pci_read_config_dword(ipd->pdev, PCI_SUBSYSTEM_VENDOR_ID, &sid);
+
+	for (i = 0; i < ARRAY_SIZE(ioc3_infos); i++)
+		if (sid == ioc3_infos[i].sid) {
+			pr_info("ioc3: %s\n", ioc3_infos[i].name);
+			return ioc3_infos[i].setup(ipd);
+		}
+
+	/* treat everything not identified by PCI subid as CAD DUO */
+	pr_info("ioc3: CAD DUO\n");
+	return ioc3_cad_duo_setup(ipd);
+}
+
+static int ioc3_mfd_probe(struct pci_dev *pdev,
+			  const struct pci_device_id *pci_id)
+{
+	struct ioc3_priv_data *ipd;
+	struct ioc3 __iomem *regs;
+	int ret;
+
+	ret = pci_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, IOC3_LATENCY);
+	pci_set_master(pdev);
+
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (ret) {
+		dev_warn(&pdev->dev,
+			 "Failed to set 64-bit DMA mask, trying 32-bit\n");
+		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+		if (ret) {
+			dev_err(&pdev->dev, "Can't set DMA mask, aborting\n");
+			return ret;
+		}
+	}
+
+	/* Set up per-IOC3 data */
+	ipd = devm_kzalloc(&pdev->dev, sizeof(struct ioc3_priv_data),
+			   GFP_KERNEL);
+	if (!ipd) {
+		ret = -ENOMEM;
+		goto out_disable_device;
+	}
+	ipd->pdev = pdev;
+
+	/*
+	 * Map all IOC3 registers.  These are shared between subdevices
+	 * so the main IOC3 module manages them.
+	 */
+	regs = pci_ioremap_bar(pdev, 0);
+	if (!regs) {
+		dev_warn(&pdev->dev, "ioc3: Unable to remap PCI BAR for %s.\n",
+			 pci_name(pdev));
+		ret = -ENOMEM;
+		goto out_disable_device;
+	}
+	ipd->regs = regs;
+
+	/* Track PCI-device specific data */
+	pci_set_drvdata(pdev, ipd);
+
+	ret = ioc3_setup(ipd);
+	if (ret)
+		goto out_disable_device;
+
+	return 0;
+
+out_disable_device:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void ioc3_mfd_remove(struct pci_dev *pdev)
+{
+	struct ioc3_priv_data *ipd;
+
+	ipd = pci_get_drvdata(pdev);
+
+	/* Clear and disable all IRQs */
+	writel(~0, &ipd->regs->sio_iec);
+	writel(~0, &ipd->regs->sio_ir);
+
+	/* Release resources */
+	if (ipd->domain) {
+		irq_domain_remove(ipd->domain);
+		free_irq(ipd->domain_irq, (void *)ipd);
+	}
+	pci_disable_device(pdev);
+}
+
+static struct pci_device_id ioc3_mfd_id_table[] = {
+	{ PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, ioc3_mfd_id_table);
+
+static struct pci_driver ioc3_mfd_driver = {
+	.name = "IOC3",
+	.id_table = ioc3_mfd_id_table,
+	.probe = ioc3_mfd_probe,
+	.remove = ioc3_mfd_remove,
+};
+
+module_pci_driver(ioc3_mfd_driver);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
+MODULE_DESCRIPTION("SGI IOC3 MFD driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/ethernet/sgi/Kconfig b/drivers/net/ethernet/sgi/Kconfig
index 37f048e1230c..32a72b532605 100644
--- a/drivers/net/ethernet/sgi/Kconfig
+++ b/drivers/net/ethernet/sgi/Kconfig
@@ -6,7 +6,7 @@
 config NET_VENDOR_SGI
 	bool "SGI devices"
 	default y
-	depends on (PCI && SGI_IP27) || SGI_IP32
+	depends on (PCI && SGI_MFD_IOC3) ||  SGI_IP32
 	---help---
 	  If you have a network (Ethernet) card belonging to this class, say Y.
 
@@ -19,7 +19,7 @@ if NET_VENDOR_SGI
 
 config SGI_IOC3_ETH
 	bool "SGI IOC3 Ethernet"
-	depends on PCI && SGI_IP27
+	depends on PCI && SGI_MFD_IOC3
 	select CRC32
 	select MII
 	---help---
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 25597c6194d9..1f98b381774a 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -15,8 +15,6 @@
  *  o Use prefetching for large packets.  What is a good lower limit for
  *    prefetching?
  *  o We're probably allocating a bit too much memory.
- *  o Use hardware checksums.
- *  o Convert to using a IOC3 meta driver.
  *  o Which PHYs might possibly be attached to the IOC3 in real live,
  *    which workarounds are required for them?  Do we ever have Lucent's?
  *  o For the 2.5 branch kill the mii-tool ioctls.
@@ -30,7 +28,8 @@
 #include <linux/mm.h>
 #include <linux/errno.h>
 #include <linux/module.h>
-#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/crc16.h>
 #include <linux/crc32.h>
 #include <linux/mii.h>
 #include <linux/in.h>
@@ -39,28 +38,22 @@
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <linux/gfp.h>
-
-#ifdef CONFIG_SERIAL_8250
-#include <linux/serial_core.h>
-#include <linux/serial_8250.h>
-#include <linux/serial_reg.h>
-#endif
-
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/skbuff.h>
 #include <linux/dma-direct.h>
+#include <linux/platform_device.h>
+#include <linux/nvmem-consumer.h>
 
 #include <net/ip.h>
 
-#include <asm/byteorder.h>
-#include <asm/pgtable.h>
-#include <linux/uaccess.h>
-#include <asm/sn/types.h>
 #include <asm/sn/ioc3.h>
 #include <asm/pci/bridge.h>
 
+#define CRC16_INIT	0
+#define CRC16_VALID	0xb001
+
 /* Number of RX buffers.  This is tunable in the range of 16 <= x < 512.
  * The value must be a power of two.
  */
@@ -86,7 +79,6 @@
 /* Private per NIC data of the driver.  */
 struct ioc3_private {
 	struct ioc3_ethregs *regs;
-	struct ioc3 *all_regs;
 	struct device *dma_dev;
 	u32 *ssram;
 	unsigned long *rxr;		/* pointer to receiver ring */
@@ -104,24 +96,15 @@ struct ioc3_private {
 	spinlock_t ioc3_lock;
 	struct mii_if_info mii;
 
-	struct net_device *dev;
-	struct pci_dev *pdev;
-
 	/* Members used by autonegotiation  */
 	struct timer_list ioc3_timer;
 };
 
 static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 static void ioc3_set_multicast_list(struct net_device *dev);
-static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev);
-static void ioc3_timeout(struct net_device *dev);
-static inline unsigned int ioc3_hash(const unsigned char *addr);
 static inline void ioc3_stop(struct ioc3_private *ip);
 static void ioc3_init(struct net_device *dev);
 
-static const char ioc3_str[] = "IOC3 Ethernet";
-static const struct ethtool_ops ioc3_ethtool_ops;
-
 #ifdef CONFIG_PCI_XTALK_BRIDGE
 static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr)
 {
@@ -138,227 +121,6 @@ static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr)
 #define ERBAR_VAL	0
 #endif
 
-#define IOC3_SIZE 0x100000
-
-static inline u32 mcr_pack(u32 pulse, u32 sample)
-{
-	return (pulse << 10) | (sample << 2);
-}
-
-static int nic_wait(u32 __iomem *mcr)
-{
-	u32 m;
-
-	do {
-		m = readl(mcr);
-	} while (!(m & 2));
-
-	return m & 1;
-}
-
-static int nic_reset(u32 __iomem *mcr)
-{
-	int presence;
-
-	writel(mcr_pack(500, 65), mcr);
-	presence = nic_wait(mcr);
-
-	writel(mcr_pack(0, 500), mcr);
-	nic_wait(mcr);
-
-	return presence;
-}
-
-static inline int nic_read_bit(u32 __iomem *mcr)
-{
-	int result;
-
-	writel(mcr_pack(6, 13), mcr);
-	result = nic_wait(mcr);
-	writel(mcr_pack(0, 100), mcr);
-	nic_wait(mcr);
-
-	return result;
-}
-
-static inline void nic_write_bit(u32 __iomem *mcr, int bit)
-{
-	if (bit)
-		writel(mcr_pack(6, 110), mcr);
-	else
-		writel(mcr_pack(80, 30), mcr);
-
-	nic_wait(mcr);
-}
-
-/* Read a byte from an iButton device
- */
-static u32 nic_read_byte(u32 __iomem *mcr)
-{
-	u32 result = 0;
-	int i;
-
-	for (i = 0; i < 8; i++)
-		result = (result >> 1) | (nic_read_bit(mcr) << 7);
-
-	return result;
-}
-
-/* Write a byte to an iButton device
- */
-static void nic_write_byte(u32 __iomem *mcr, int byte)
-{
-	int i, bit;
-
-	for (i = 8; i; i--) {
-		bit = byte & 1;
-		byte >>= 1;
-
-		nic_write_bit(mcr, bit);
-	}
-}
-
-static u64 nic_find(u32 __iomem *mcr, int *last)
-{
-	int a, b, index, disc;
-	u64 address = 0;
-
-	nic_reset(mcr);
-	/* Search ROM.  */
-	nic_write_byte(mcr, 0xf0);
-
-	/* Algorithm from ``Book of iButton Standards''.  */
-	for (index = 0, disc = 0; index < 64; index++) {
-		a = nic_read_bit(mcr);
-		b = nic_read_bit(mcr);
-
-		if (a && b) {
-			pr_warn("NIC search failed (not fatal).\n");
-			*last = 0;
-			return 0;
-		}
-
-		if (!a && !b) {
-			if (index == *last) {
-				address |= 1UL << index;
-			} else if (index > *last) {
-				address &= ~(1UL << index);
-				disc = index;
-			} else if ((address & (1UL << index)) == 0) {
-				disc = index;
-			}
-			nic_write_bit(mcr, address & (1UL << index));
-			continue;
-		} else {
-			if (a)
-				address |= 1UL << index;
-			else
-				address &= ~(1UL << index);
-			nic_write_bit(mcr, a);
-			continue;
-		}
-	}
-
-	*last = disc;
-
-	return address;
-}
-
-static int nic_init(u32 __iomem *mcr)
-{
-	const char *unknown = "unknown";
-	const char *type = unknown;
-	u8 crc;
-	u8 serial[6];
-	int save = 0, i;
-
-	while (1) {
-		u64 reg;
-
-		reg = nic_find(mcr, &save);
-
-		switch (reg & 0xff) {
-		case 0x91:
-			type = "DS1981U";
-			break;
-		default:
-			if (save == 0) {
-				/* Let the caller try again.  */
-				return -1;
-			}
-			continue;
-		}
-
-		nic_reset(mcr);
-
-		/* Match ROM.  */
-		nic_write_byte(mcr, 0x55);
-		for (i = 0; i < 8; i++)
-			nic_write_byte(mcr, (reg >> (i << 3)) & 0xff);
-
-		reg >>= 8; /* Shift out type.  */
-		for (i = 0; i < 6; i++) {
-			serial[i] = reg & 0xff;
-			reg >>= 8;
-		}
-		crc = reg & 0xff;
-		break;
-	}
-
-	pr_info("Found %s NIC", type);
-	if (type != unknown)
-		pr_cont(" registration number %pM, CRC %02x", serial, crc);
-	pr_cont(".\n");
-
-	return 0;
-}
-
-/* Read the NIC (Number-In-a-Can) device used to store the MAC address on
- * SN0 / SN00 nodeboards and PCI cards.
- */
-static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
-{
-	u32 __iomem *mcr = &ip->all_regs->mcr;
-	int tries = 2; /* There may be some problem with the battery?  */
-	u8 nic[14];
-	int i;
-
-	writel(1 << 21, &ip->all_regs->gpcr_s);
-
-	while (tries--) {
-		if (!nic_init(mcr))
-			break;
-		udelay(500);
-	}
-
-	if (tries < 0) {
-		pr_err("Failed to read MAC address\n");
-		return;
-	}
-
-	/* Read Memory.  */
-	nic_write_byte(mcr, 0xf0);
-	nic_write_byte(mcr, 0x00);
-	nic_write_byte(mcr, 0x00);
-
-	for (i = 13; i >= 0; i--)
-		nic[i] = nic_read_byte(mcr);
-
-	for (i = 2; i < 8; i++)
-		ip->dev->dev_addr[i - 2] = nic[i];
-}
-
-/* Ok, this is hosed by design.  It's necessary to know what machine the
- * NIC is in in order to know how to read the NIC address.  We also have
- * to know if it's a PCI card or a NIC in on the node board ...
- */
-static void ioc3_get_eaddr(struct ioc3_private *ip)
-{
-	ioc3_get_eaddr_nic(ip);
-
-	pr_info("Ethernet address is %pM.\n", ip->dev->dev_addr);
-}
-
 static void __ioc3_set_mac_address(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
@@ -717,7 +479,7 @@ static int ioc3_mii_init(struct ioc3_private *ip)
 	u16 word;
 
 	for (i = 0; i < 32; i++) {
-		word = ioc3_mdio_read(ip->dev, i, MII_PHYSID1);
+		word = ioc3_mdio_read(ip->mii.dev, i, MII_PHYSID1);
 
 		if (word != 0xffff && word != 0x0000) {
 			found = 1;
@@ -994,15 +756,10 @@ static int ioc3_open(struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
 
-	if (request_irq(dev->irq, ioc3_interrupt, IRQF_SHARED, ioc3_str, dev)) {
-		netdev_err(dev, "Can't get irq %d\n", dev->irq);
-
-		return -EAGAIN;
-	}
-
 	ip->ehar_h = 0;
 	ip->ehar_l = 0;
 	ioc3_init(dev);
+	ioc3_mii_init(ip);
 	ioc3_mii_start(ip);
 
 	netif_start_queue(dev);
@@ -1018,335 +775,10 @@ static int ioc3_close(struct net_device *dev)
 	netif_stop_queue(dev);
 
 	ioc3_stop(ip);
-	free_irq(dev->irq, dev);
-
 	ioc3_free_rings(ip);
 	return 0;
 }
 
-/* MENET cards have four IOC3 chips, which are attached to two sets of
- * PCI slot resources each: the primary connections are on slots
- * 0..3 and the secondaries are on 4..7
- *
- * All four ethernets are brought out to connectors; six serial ports
- * (a pair from each of the first three IOC3s) are brought out to
- * MiniDINs; all other subdevices are left swinging in the wind, leave
- * them disabled.
- */
-
-static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
-{
-	struct pci_dev *dev = pci_get_slot(pdev->bus, PCI_DEVFN(slot, 0));
-	int ret = 0;
-
-	if (dev) {
-		if (dev->vendor == PCI_VENDOR_ID_SGI &&
-		    dev->device == PCI_DEVICE_ID_SGI_IOC3)
-			ret = 1;
-		pci_dev_put(dev);
-	}
-
-	return ret;
-}
-
-static int ioc3_is_menet(struct pci_dev *pdev)
-{
-	return !pdev->bus->parent &&
-	       ioc3_adjacent_is_ioc3(pdev, 0) &&
-	       ioc3_adjacent_is_ioc3(pdev, 1) &&
-	       ioc3_adjacent_is_ioc3(pdev, 2);
-}
-
-#ifdef CONFIG_SERIAL_8250
-/* Note about serial ports and consoles:
- * For console output, everyone uses the IOC3 UARTA (offset 0x178)
- * connected to the master node (look in ip27_setup_console() and
- * ip27prom_console_write()).
- *
- * For serial (/dev/ttyS0 etc), we can not have hardcoded serial port
- * addresses on a partitioned machine. Since we currently use the ioc3
- * serial ports, we use dynamic serial port discovery that the serial.c
- * driver uses for pci/pnp ports (there is an entry for the SGI ioc3
- * boards in pci_boards[]). Unfortunately, UARTA's pio address is greater
- * than UARTB's, although UARTA on o200s has traditionally been known as
- * port 0. So, we just use one serial port from each ioc3 (since the
- * serial driver adds addresses to get to higher ports).
- *
- * The first one to do a register_console becomes the preferred console
- * (if there is no kernel command line console= directive). /dev/console
- * (ie 5, 1) is then "aliased" into the device number returned by the
- * "device" routine referred to in this console structure
- * (ip27prom_console_dev).
- *
- * Also look in ip27-pci.c:pci_fixup_ioc3() for some comments on working
- * around ioc3 oddities in this respect.
- *
- * The IOC3 serials use a 22MHz clock rate with an additional divider which
- * can be programmed in the SCR register if the DLAB bit is set.
- *
- * Register to interrupt zero because we share the interrupt with
- * the serial driver which we don't properly support yet.
- *
- * Can't use UPF_IOREMAP as the whole of IOC3 resources have already been
- * registered.
- */
-static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart)
-{
-#define COSMISC_CONSTANT 6
-
-	struct uart_8250_port port = {
-		.port = {
-			.irq		= 0,
-			.flags		= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
-			.iotype		= UPIO_MEM,
-			.regshift	= 0,
-			.uartclk	= (22000000 << 1) / COSMISC_CONSTANT,
-
-			.membase	= (unsigned char __iomem *)uart,
-			.mapbase	= (unsigned long)uart,
-		}
-	};
-	unsigned char lcr;
-
-	lcr = readb(&uart->iu_lcr);
-	writeb(lcr | UART_LCR_DLAB, &uart->iu_lcr);
-	writeb(COSMISC_CONSTANT, &uart->iu_scr);
-	writeb(lcr, &uart->iu_lcr);
-	readb(&uart->iu_lcr);
-	serial8250_register_8250_port(&port);
-}
-
-static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
-{
-	u32 sio_iec;
-
-	/* We need to recognice and treat the fourth MENET serial as it
-	 * does not have an SuperIO chip attached to it, therefore attempting
-	 * to access it will result in bus errors.  We call something an
-	 * MENET if PCI slot 0, 1, 2 and 3 of a master PCI bus all have an IOC3
-	 * in it.  This is paranoid but we want to avoid blowing up on a
-	 * showhorn PCI box that happens to have 4 IOC3 cards in it so it's
-	 * not paranoid enough ...
-	 */
-	if (ioc3_is_menet(pdev) && PCI_SLOT(pdev->devfn) == 3)
-		return;
-
-	/* Switch IOC3 to PIO mode.  It probably already was but let's be
-	 * paranoid
-	 */
-	writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, &ioc3->gpcr_s);
-	readl(&ioc3->gpcr_s);
-	writel(0, &ioc3->gppr[6]);
-	readl(&ioc3->gppr[6]);
-	writel(0, &ioc3->gppr[7]);
-	readl(&ioc3->gppr[7]);
-	writel(readl(&ioc3->port_a.sscr) & ~SSCR_DMA_EN, &ioc3->port_a.sscr);
-	readl(&ioc3->port_a.sscr);
-	writel(readl(&ioc3->port_b.sscr) & ~SSCR_DMA_EN, &ioc3->port_b.sscr);
-	readl(&ioc3->port_b.sscr);
-	/* Disable all SA/B interrupts except for SA/B_INT in SIO_IEC. */
-	sio_iec = readl(&ioc3->sio_iec);
-	sio_iec &= ~(SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL |
-		     SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER |
-		     SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS |
-		     SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR);
-	sio_iec |= SIO_IR_SA_INT;
-	sio_iec &= ~(SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL |
-		     SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER |
-		     SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS |
-		     SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR);
-	sio_iec |= SIO_IR_SB_INT;
-	writel(sio_iec, &ioc3->sio_iec);
-	writel(0, &ioc3->port_a.sscr);
-	writel(0, &ioc3->port_b.sscr);
-
-	ioc3_8250_register(&ioc3->sregs.uarta);
-	ioc3_8250_register(&ioc3->sregs.uartb);
-}
-#endif
-
-static const struct net_device_ops ioc3_netdev_ops = {
-	.ndo_open		= ioc3_open,
-	.ndo_stop		= ioc3_close,
-	.ndo_start_xmit		= ioc3_start_xmit,
-	.ndo_tx_timeout		= ioc3_timeout,
-	.ndo_get_stats		= ioc3_get_stats,
-	.ndo_set_rx_mode	= ioc3_set_multicast_list,
-	.ndo_do_ioctl		= ioc3_ioctl,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_set_mac_address	= ioc3_set_mac_address,
-};
-
-static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
-{
-	unsigned int sw_physid1, sw_physid2;
-	struct net_device *dev = NULL;
-	struct ioc3_private *ip;
-	struct ioc3 *ioc3;
-	unsigned long ioc3_base, ioc3_size;
-	u32 vendor, model, rev;
-	int err, pci_using_dac;
-
-	/* Configure DMA attributes. */
-	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
-	if (!err) {
-		pci_using_dac = 1;
-		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
-		if (err < 0) {
-			pr_err("%s: Unable to obtain 64 bit DMA for consistent allocations\n",
-			       pci_name(pdev));
-			goto out;
-		}
-	} else {
-		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-		if (err) {
-			pr_err("%s: No usable DMA configuration, aborting.\n",
-			       pci_name(pdev));
-			goto out;
-		}
-		pci_using_dac = 0;
-	}
-
-	if (pci_enable_device(pdev))
-		return -ENODEV;
-
-	dev = alloc_etherdev(sizeof(struct ioc3_private));
-	if (!dev) {
-		err = -ENOMEM;
-		goto out_disable;
-	}
-
-	if (pci_using_dac)
-		dev->features |= NETIF_F_HIGHDMA;
-
-	err = pci_request_regions(pdev, "ioc3");
-	if (err)
-		goto out_free;
-
-	SET_NETDEV_DEV(dev, &pdev->dev);
-
-	ip = netdev_priv(dev);
-	ip->dev = dev;
-	ip->dma_dev = &pdev->dev;
-
-	dev->irq = pdev->irq;
-
-	ioc3_base = pci_resource_start(pdev, 0);
-	ioc3_size = pci_resource_len(pdev, 0);
-	ioc3 = (struct ioc3 *)ioremap(ioc3_base, ioc3_size);
-	if (!ioc3) {
-		pr_err("ioc3eth(%s): ioremap failed, goodbye.\n",
-		       pci_name(pdev));
-		err = -ENOMEM;
-		goto out_res;
-	}
-	ip->regs = &ioc3->eth;
-	ip->ssram = ioc3->ssram;
-	ip->all_regs = ioc3;
-
-#ifdef CONFIG_SERIAL_8250
-	ioc3_serial_probe(pdev, ioc3);
-#endif
-
-	spin_lock_init(&ip->ioc3_lock);
-	timer_setup(&ip->ioc3_timer, ioc3_timer, 0);
-
-	ioc3_stop(ip);
-	ioc3_init(dev);
-
-	ip->pdev = pdev;
-
-	ip->mii.phy_id_mask = 0x1f;
-	ip->mii.reg_num_mask = 0x1f;
-	ip->mii.dev = dev;
-	ip->mii.mdio_read = ioc3_mdio_read;
-	ip->mii.mdio_write = ioc3_mdio_write;
-
-	ioc3_mii_init(ip);
-
-	if (ip->mii.phy_id == -1) {
-		pr_err("ioc3-eth(%s): Didn't find a PHY, goodbye.\n",
-		       pci_name(pdev));
-		err = -ENODEV;
-		goto out_stop;
-	}
-
-	ioc3_mii_start(ip);
-	ioc3_ssram_disc(ip);
-	ioc3_get_eaddr(ip);
-
-	/* The IOC3-specific entries in the device structure. */
-	dev->watchdog_timeo	= 5 * HZ;
-	dev->netdev_ops		= &ioc3_netdev_ops;
-	dev->ethtool_ops	= &ioc3_ethtool_ops;
-	dev->hw_features	= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
-	dev->features		= NETIF_F_IP_CSUM;
-
-	sw_physid1 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID1);
-	sw_physid2 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID2);
-
-	err = register_netdev(dev);
-	if (err)
-		goto out_stop;
-
-	mii_check_media(&ip->mii, 1, 1);
-	ioc3_setup_duplex(ip);
-
-	vendor = (sw_physid1 << 12) | (sw_physid2 >> 4);
-	model  = (sw_physid2 >> 4) & 0x3f;
-	rev    = sw_physid2 & 0xf;
-	netdev_info(dev, "Using PHY %d, vendor 0x%x, model %d, rev %d.\n",
-		    ip->mii.phy_id, vendor, model, rev);
-	netdev_info(dev, "IOC3 SSRAM has %d kbyte.\n",
-		    ip->emcr & EMCR_BUFSIZ ? 128 : 64);
-
-	return 0;
-
-out_stop:
-	ioc3_stop(ip);
-	del_timer_sync(&ip->ioc3_timer);
-	ioc3_free_rings(ip);
-out_res:
-	pci_release_regions(pdev);
-out_free:
-	free_netdev(dev);
-out_disable:
-	/* We should call pci_disable_device(pdev); here if the IOC3 wasn't
-	 * such a weird device ...
-	 */
-out:
-	return err;
-}
-
-static void ioc3_remove_one(struct pci_dev *pdev)
-{
-	struct net_device *dev = pci_get_drvdata(pdev);
-	struct ioc3_private *ip = netdev_priv(dev);
-
-	unregister_netdev(dev);
-	del_timer_sync(&ip->ioc3_timer);
-
-	iounmap(ip->all_regs);
-	pci_release_regions(pdev);
-	free_netdev(dev);
-	/* We should call pci_disable_device(pdev); here if the IOC3 wasn't
-	 * such a weird device ...
-	 */
-}
-
-static const struct pci_device_id ioc3_pci_tbl[] = {
-	{ PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID },
-	{ 0 }
-};
-MODULE_DEVICE_TABLE(pci, ioc3_pci_tbl);
-
-static struct pci_driver ioc3_driver = {
-	.name		= "ioc3-eth",
-	.id_table	= ioc3_pci_tbl,
-	.probe		= ioc3_probe,
-	.remove		= ioc3_remove_one,
-};
-
 static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ioc3_private *ip = netdev_priv(dev);
@@ -1478,6 +910,18 @@ static void ioc3_timeout(struct net_device *dev)
 	netif_wake_queue(dev);
 }
 
+static const struct net_device_ops ioc3_netdev_ops = {
+	.ndo_open		= ioc3_open,
+	.ndo_stop		= ioc3_close,
+	.ndo_start_xmit		= ioc3_start_xmit,
+	.ndo_tx_timeout		= ioc3_timeout,
+	.ndo_get_stats		= ioc3_get_stats,
+	.ndo_set_rx_mode	= ioc3_set_multicast_list,
+	.ndo_do_ioctl		= ioc3_ioctl,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= ioc3_set_mac_address,
+};
+
 /* Given a multicast ethernet address, this routine calculates the
  * address's bit index in the logical address filter mask
  */
@@ -1502,11 +946,10 @@ static inline unsigned int ioc3_hash(const unsigned char *addr)
 static void ioc3_get_drvinfo(struct net_device *dev,
 			     struct ethtool_drvinfo *info)
 {
-	struct ioc3_private *ip = netdev_priv(dev);
-
 	strlcpy(info->driver, IOC3_NAME, sizeof(info->driver));
 	strlcpy(info->version, IOC3_VERSION, sizeof(info->version));
-	strlcpy(info->bus_info, pci_name(ip->pdev), sizeof(info->bus_info));
+	strlcpy(info->bus_info, pci_name(to_pci_dev(dev->dev.parent)),
+		sizeof(info->bus_info));
 }
 
 static int ioc3_get_link_ksettings(struct net_device *dev,
@@ -1617,7 +1060,184 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 	spin_unlock_irq(&ip->ioc3_lock);
 }
 
-module_pci_driver(ioc3_driver);
+static int ioc3eth_nvmem_match(struct device *dev, const void *data)
+{
+	const char *name = dev_name(dev);
+	const char *prefix = data;
+	int prefix_len;
+
+	prefix_len = strlen(prefix);
+	if (strlen(name) < (prefix_len + 3))
+		return 0;
+
+	if (memcmp(prefix, name, prefix_len) != 0)
+		return 0;
+
+	/* found nvmem device which is attached to our ioc3
+	 * now check for one wire family code 09, 89 and 91
+	 */
+	if (memcmp(name + prefix_len, "09-", 3) == 0)
+		return 1;
+	if (memcmp(name + prefix_len, "89-", 3) == 0)
+		return 1;
+	if (memcmp(name + prefix_len, "91-", 3) == 0)
+		return 1;
+
+	return 0;
+}
+
+static int ioc3eth_get_mac_addr(struct resource *res, u8 mac_addr[6])
+{
+	struct nvmem_device *nvmem;
+	char prefix[24];
+	u8 prom[16];
+	int ret;
+	int i;
+
+	snprintf(prefix, sizeof(prefix), "ioc3-%012llx-",
+		 res->start & ~0xffff);
+
+	nvmem = nvmem_device_find(prefix, ioc3eth_nvmem_match);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
+
+	ret = nvmem_device_read(nvmem, 0, 16, prom);
+	nvmem_device_put(nvmem);
+	if (ret < 0)
+		return ret;
+
+	/* check, if content is valid */
+	if (prom[0] != 0x0a ||
+	    crc16(CRC16_INIT, prom, 13) != CRC16_VALID)
+		return -EINVAL;
+
+	for (i = 0; i < 6; i++)
+		mac_addr[i] = prom[10 - i];
+
+	return 0;
+}
+
+static int ioc3eth_probe(struct platform_device *pdev)
+{
+	u32 sw_physid1, sw_physid2, vendor, model, rev;
+	struct ioc3_private *ip;
+	struct net_device *dev;
+	struct resource *regs;
+	u8 mac_addr[6];
+	int err;
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	/* get mac addr from one wire prom */
+	if (ioc3eth_get_mac_addr(regs, mac_addr))
+		return -EPROBE_DEFER; /* not available yet */
+
+	dev = alloc_etherdev(sizeof(struct ioc3_private));
+	if (!dev)
+		return -ENOMEM;
+
+	/* The IOC3-specific entries in the device structure. */
+	dev->watchdog_timeo	= 5 * HZ;
+	dev->netdev_ops		= &ioc3_netdev_ops;
+	dev->ethtool_ops	= &ioc3_ethtool_ops;
+	dev->features		= NETIF_F_IP_CSUM | NETIF_F_HIGHDMA;
+
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	ip = netdev_priv(dev);
+	ip->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (!ip->regs)
+		return -ENOMEM;
+
+	ip->ssram = devm_platform_ioremap_resource(pdev, 1);
+	if (!ip->ssram)
+		return -ENOMEM;
+
+	ip->dma_dev = pdev->dev.parent;
+
+	dev->irq = platform_get_irq(pdev, 0);
+	if (dev->irq < 0)
+		return dev->irq;
+
+	if (devm_request_irq(&pdev->dev, dev->irq, ioc3_interrupt,
+			     IRQF_SHARED, "ioc3-eth", dev)) {
+		dev_err(&pdev->dev, "Can't get irq %d\n", dev->irq);
+		return -ENODEV;
+	}
+
+	spin_lock_init(&ip->ioc3_lock);
+	timer_setup(&ip->ioc3_timer, ioc3_timer, 0);
+
+	ioc3_stop(ip);
+	ioc3_init(dev);
+
+	ip->mii.phy_id_mask = 0x1f;
+	ip->mii.reg_num_mask = 0x1f;
+	ip->mii.dev = dev;
+	ip->mii.mdio_read = ioc3_mdio_read;
+	ip->mii.mdio_write = ioc3_mdio_write;
+
+	ioc3_mii_init(ip);
+
+	if (ip->mii.phy_id == -1) {
+		netdev_err(dev, "Didn't find a PHY, goodbye.\n");
+		err = -ENODEV;
+		goto out_stop;
+	}
+
+	ioc3_mii_start(ip);
+	ioc3_ssram_disc(ip);
+	memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
+
+	sw_physid1 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID1);
+	sw_physid2 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID2);
+
+	err = register_netdev(dev);
+	if (err)
+		goto out_stop;
+
+	mii_check_media(&ip->mii, 1, 1);
+	ioc3_setup_duplex(ip);
+
+	vendor = (sw_physid1 << 12) | (sw_physid2 >> 4);
+	model  = (sw_physid2 >> 4) & 0x3f;
+	rev    = sw_physid2 & 0xf;
+	netdev_info(dev, "Using PHY %d, vendor 0x%x, model %d, rev %d.\n",
+		    ip->mii.phy_id, vendor, model, rev);
+	netdev_info(dev, "IOC3 SSRAM has %d kbyte.\n",
+		    (ip->emcr & EMCR_BUFSIZ ? 128 : 64));
+
+	return 0;
+
+out_stop:
+	ioc3_stop(ip);
+	del_timer_sync(&ip->ioc3_timer);
+	ioc3_free_rings(ip);
+	free_netdev(dev);
+	return err;
+}
+
+static int ioc3eth_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+	struct ioc3_private *ip = netdev_priv(dev);
+
+	unregister_netdev(dev);
+	del_timer_sync(&ip->ioc3_timer);
+	ioc3_free_rings(ip);
+	free_netdev(dev);
+
+	return 0;
+}
+
+static struct platform_driver ioc3eth_driver = {
+	.probe  = ioc3eth_probe,
+	.remove = ioc3eth_remove,
+	.driver = {
+		.name = "ioc3-eth",
+	}
+};
+
+module_platform_driver(ioc3eth_driver);
+
 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
 MODULE_DESCRIPTION("SGI IOC3 Ethernet driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/tty/serial/8250/8250_ioc3.c b/drivers/tty/serial/8250/8250_ioc3.c
new file mode 100644
index 000000000000..2be6ed2967e0
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_ioc3.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SGI IOC3 8250 UART driver
+ *
+ * Copyright (C) 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de>
+ *
+ * based on code Copyright (C) 2005 Stanislaw Skowronek <skylark@unaligned.org>
+ *               Copyright (C) 2014 Joshua Kinard <kumba@gentoo.org>
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include "8250.h"
+
+#define IOC3_UARTCLK (22000000 / 3)
+
+struct ioc3_8250_data {
+	int line;
+};
+
+static unsigned int ioc3_serial_in(struct uart_port *p, int offset)
+{
+	return readb(p->membase + offset);
+}
+
+static void ioc3_serial_out(struct uart_port *p, int offset, int value)
+{
+	writeb(value, p->membase + offset);
+}
+
+static int serial8250_ioc3_probe(struct platform_device *pdev)
+{
+	struct ioc3_8250_data *data;
+	struct uart_8250_port up;
+	struct resource *r;
+	void __iomem *membase;
+	int irq, line;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -ENODEV;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	membase = devm_ioremap_nocache(&pdev->dev, r->start, resource_size(r));
+	if (!membase)
+		return -ENOMEM;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		irq = 0; /* no interrupt -> use polling */
+
+	/* Register serial ports with 8250.c */
+	memset(&up, 0, sizeof(struct uart_8250_port));
+	up.port.iotype = UPIO_MEM;
+	up.port.uartclk = IOC3_UARTCLK;
+	up.port.type = PORT_16550A;
+	up.port.irq = irq;
+	up.port.flags = (UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ);
+	up.port.dev = &pdev->dev;
+	up.port.membase = membase;
+	up.port.mapbase = r->start;
+	up.port.serial_in = ioc3_serial_in;
+	up.port.serial_out = ioc3_serial_out;
+	line = serial8250_register_8250_port(&up);
+	if (line < 0)
+		return line;
+
+	platform_set_drvdata(pdev, data);
+	return 0;
+}
+
+static int serial8250_ioc3_remove(struct platform_device *pdev)
+{
+	struct ioc3_8250_data *data = platform_get_drvdata(pdev);
+
+	serial8250_unregister_port(data->line);
+	return 0;
+}
+
+static struct platform_driver serial8250_ioc3_driver = {
+	.probe  = serial8250_ioc3_probe,
+	.remove = serial8250_ioc3_remove,
+	.driver = {
+		.name = "ioc3-serial8250",
+	}
+};
+
+module_platform_driver(serial8250_ioc3_driver);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
+MODULE_DESCRIPTION("SGI IOC3 8250 UART driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 509f6a3bb9ff..7ed0a63a3a71 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -366,6 +366,17 @@ config SERIAL_8250_EM
 	  port hardware found on the Emma Mobile line of processors.
 	  If unsure, say N.
 
+config SERIAL_8250_IOC3
+	tristate "SGI IOC3 8250 UART support"
+	depends on SGI_MFD_IOC3 && SERIAL_8250
+	select SERIAL_8250_EXTENDED
+	select SERIAL_8250_SHARE_IRQ
+	help
+	  Enable this if you have a SGI Origin or Octane machine. This module
+	  provides basic serial support by directly driving the UART chip
+	  behind the IOC3 device on those systems.  Maximum baud speed is
+	  38400bps using this driver.
+
 config SERIAL_8250_RT288X
 	bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
 	depends on SERIAL_8250
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 18751bc63a84..79f74b4d57e5 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_SERIAL_8250_FSL)		+= 8250_fsl.o
 obj-$(CONFIG_SERIAL_8250_MEN_MCB)	+= 8250_men_mcb.o
 obj-$(CONFIG_SERIAL_8250_DW)		+= 8250_dw.o
 obj-$(CONFIG_SERIAL_8250_EM)		+= 8250_em.o
+obj-$(CONFIG_SERIAL_8250_IOC3)		+= 8250_ioc3.o
 obj-$(CONFIG_SERIAL_8250_OMAP)		+= 8250_omap.o
 obj-$(CONFIG_SERIAL_8250_LPC18XX)	+= 8250_lpc18xx.o
 obj-$(CONFIG_SERIAL_8250_MT6577)	+= 8250_mtk.o
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 16/17] MIPS: SGI-IP27: fix readb/writeb addressing
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (14 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 16:31 ` [PATCH v5 17/17] Input: add IOC3 serio driver Thomas Bogendoerfer
  2019-08-19 23:51 ` [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Jakub Kicinski
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

Our chosen byte swapping, which is what firmware already uses, is to
do readl/writel by normal lw/sw intructions (data invariance). This
also means we need to mangle addresses for u8 and u16 accesses. The
mangling for 16bit has been done aready, but 8bit one was missing.
Correcting this causes different addresses for accesses to the
SuperIO and local bus of the IOC3 chip. This is fixed by changing
byte order in ioc3 and m48rtc_rtc structs.

Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 arch/mips/include/asm/mach-ip27/mangle-port.h |  4 +--
 arch/mips/include/asm/sn/ioc3.h               | 42 ++++++++++++---------------
 drivers/rtc/rtc-m48t35.c                      | 11 +++++++
 drivers/tty/serial/8250/8250_ioc3.c           |  4 +--
 4 files changed, 34 insertions(+), 27 deletions(-)

diff --git a/arch/mips/include/asm/mach-ip27/mangle-port.h b/arch/mips/include/asm/mach-ip27/mangle-port.h
index f6e4912ea062..27c56efa519f 100644
--- a/arch/mips/include/asm/mach-ip27/mangle-port.h
+++ b/arch/mips/include/asm/mach-ip27/mangle-port.h
@@ -8,7 +8,7 @@
 #ifndef __ASM_MACH_IP27_MANGLE_PORT_H
 #define __ASM_MACH_IP27_MANGLE_PORT_H
 
-#define __swizzle_addr_b(port)	(port)
+#define __swizzle_addr_b(port)	((port) ^ 3)
 #define __swizzle_addr_w(port)	((port) ^ 2)
 #define __swizzle_addr_l(port)	(port)
 #define __swizzle_addr_q(port)	(port)
@@ -20,6 +20,6 @@
 # define ioswabl(a, x)		(x)
 # define __mem_ioswabl(a, x)	cpu_to_le32(x)
 # define ioswabq(a, x)		(x)
-# define __mem_ioswabq(a, x)	cpu_to_le32(x)
+# define __mem_ioswabq(a, x)	cpu_to_le64(x)
 
 #endif /* __ASM_MACH_IP27_MANGLE_PORT_H */
diff --git a/arch/mips/include/asm/sn/ioc3.h b/arch/mips/include/asm/sn/ioc3.h
index 8ed952d93252..3865d3225780 100644
--- a/arch/mips/include/asm/sn/ioc3.h
+++ b/arch/mips/include/asm/sn/ioc3.h
@@ -21,50 +21,50 @@ struct ioc3_serialregs {
 
 /* SUPERIO uart register map */
 struct ioc3_uartregs {
+	u8	iu_lcr;
 	union {
-		u8	iu_rbr;	/* read only, DLAB == 0 */
-		u8	iu_thr;	/* write only, DLAB == 0 */
-		u8	iu_dll;	/* DLAB == 1 */
+		u8	iu_iir;	/* read only */
+		u8	iu_fcr;	/* write only */
 	};
 	union {
 		u8	iu_ier;	/* DLAB == 0 */
 		u8	iu_dlm;	/* DLAB == 1 */
 	};
 	union {
-		u8	iu_iir;	/* read only */
-		u8	iu_fcr;	/* write only */
+		u8	iu_rbr;	/* read only, DLAB == 0 */
+		u8	iu_thr;	/* write only, DLAB == 0 */
+		u8	iu_dll;	/* DLAB == 1 */
 	};
-	u8	iu_lcr;
-	u8	iu_mcr;
-	u8	iu_lsr;
-	u8	iu_msr;
 	u8	iu_scr;
+	u8	iu_msr;
+	u8	iu_lsr;
+	u8	iu_mcr;
 };
 
 struct ioc3_sioregs {
 	u8	fill[0x141];	/* starts at 0x141 */
 
-	u8	uartc;
 	u8	kbdcg;
+	u8	uartc;
 
-	u8	fill0[0x150 - 0x142 - 1];
+	u8	fill0[0x151 - 0x142 - 1];
 
-	u8	pp_data;
-	u8	pp_dsr;
 	u8	pp_dcr;
+	u8	pp_dsr;
+	u8	pp_data;
 
-	u8	fill1[0x158 - 0x152 - 1];
+	u8	fill1[0x159 - 0x153 - 1];
 
-	u8	pp_fifa;
-	u8	pp_cfgb;
 	u8	pp_ecr;
+	u8	pp_cfgb;
+	u8	pp_fifa;
 
-	u8	fill2[0x168 - 0x15a - 1];
+	u8	fill2[0x16a - 0x15b - 1];
 
-	u8	rtcad;
 	u8	rtcdat;
+	u8	rtcad;
 
-	u8	fill3[0x170 - 0x169 - 1];
+	u8	fill3[0x170 - 0x16b - 1];
 
 	struct ioc3_uartregs	uartb;	/* 0x20170  */
 	struct ioc3_uartregs	uarta;	/* 0x20178  */
@@ -590,10 +590,6 @@ struct ioc3_etxd {
 
 #define MIDR_DATA_MASK		0x0000ffff
 
-#if defined(CONFIG_SGI_IP27) || defined(CONFIG_SGI_IP30)
-extern int bridge_alloc_irq(struct pci_dev *dev);
-#endif
-
 /* subsystem IDs supplied by card detection in pci-xtalk-bridge */
 #define	IOC3_SUBSYS_IP27_BASEIO6G	0xc300
 #define	IOC3_SUBSYS_IP27_MIO		0xc301
diff --git a/drivers/rtc/rtc-m48t35.c b/drivers/rtc/rtc-m48t35.c
index d3a75d447fce..e8194f1f01a8 100644
--- a/drivers/rtc/rtc-m48t35.c
+++ b/drivers/rtc/rtc-m48t35.c
@@ -20,6 +20,16 @@
 
 struct m48t35_rtc {
 	u8	pad[0x7ff8];    /* starts at 0x7ff8 */
+#ifdef CONFIG_SGI_IP27
+	u8	hour;
+	u8	min;
+	u8	sec;
+	u8	control;
+	u8	year;
+	u8	month;
+	u8	date;
+	u8	day;
+#else
 	u8	control;
 	u8	sec;
 	u8	min;
@@ -28,6 +38,7 @@ struct m48t35_rtc {
 	u8	date;
 	u8	month;
 	u8	year;
+#endif
 };
 
 #define M48T35_RTC_SET		0x80
diff --git a/drivers/tty/serial/8250/8250_ioc3.c b/drivers/tty/serial/8250/8250_ioc3.c
index 2be6ed2967e0..4c405f1b9c67 100644
--- a/drivers/tty/serial/8250/8250_ioc3.c
+++ b/drivers/tty/serial/8250/8250_ioc3.c
@@ -23,12 +23,12 @@ struct ioc3_8250_data {
 
 static unsigned int ioc3_serial_in(struct uart_port *p, int offset)
 {
-	return readb(p->membase + offset);
+	return readb(p->membase + (offset ^ 3));
 }
 
 static void ioc3_serial_out(struct uart_port *p, int offset, int value)
 {
-	writeb(value, p->membase + offset);
+	writeb(value, p->membase + (offset ^ 3));
 }
 
 static int serial8250_ioc3_probe(struct platform_device *pdev)
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [PATCH v5 17/17] Input: add IOC3 serio driver
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (15 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 16/17] MIPS: SGI-IP27: fix readb/writeb addressing Thomas Bogendoerfer
@ 2019-08-19 16:31 ` Thomas Bogendoerfer
  2019-08-19 23:51 ` [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Jakub Kicinski
  17 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-19 16:31 UTC (permalink / raw)
  To: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

This patch adds a platform driver for supporting keyboard and mouse
interface of SGI IOC3 chips.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/input/serio/Kconfig   |  10 +++
 drivers/input/serio/Makefile  |   1 +
 drivers/input/serio/ioc3kbd.c | 160 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 171 insertions(+)
 create mode 100644 drivers/input/serio/ioc3kbd.c

diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
index f3e18f8ef9ca..373a1646019e 100644
--- a/drivers/input/serio/Kconfig
+++ b/drivers/input/serio/Kconfig
@@ -165,6 +165,16 @@ config SERIO_MACEPS2
 	  To compile this driver as a module, choose M here: the
 	  module will be called maceps2.
 
+config SERIO_SGI_IOC3
+	tristate "SGI IOC3 PS/2 controller"
+	depends on SGI_MFD_IOC3
+	help
+	  Say Y here if you have an SGI Onyx2, SGI Octane or IOC3 PCI card
+	  and you want to attach and use a keyboard, mouse, or both.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ioc3kbd.
+
 config SERIO_LIBPS2
 	tristate "PS/2 driver library"
 	depends on SERIO_I8042 || SERIO_I8042=n
diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile
index 67950a5ccb3f..6d97bad7b844 100644
--- a/drivers/input/serio/Makefile
+++ b/drivers/input/serio/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_HIL_MLC)		+= hp_sdc_mlc.o hil_mlc.o
 obj-$(CONFIG_SERIO_PCIPS2)	+= pcips2.o
 obj-$(CONFIG_SERIO_PS2MULT)	+= ps2mult.o
 obj-$(CONFIG_SERIO_MACEPS2)	+= maceps2.o
+obj-$(CONFIG_SERIO_SGI_IOC3)	+= ioc3kbd.o
 obj-$(CONFIG_SERIO_LIBPS2)	+= libps2.o
 obj-$(CONFIG_SERIO_RAW)		+= serio_raw.o
 obj-$(CONFIG_SERIO_AMS_DELTA)	+= ams_delta_serio.o
diff --git a/drivers/input/serio/ioc3kbd.c b/drivers/input/serio/ioc3kbd.c
new file mode 100644
index 000000000000..32df2743c27f
--- /dev/null
+++ b/drivers/input/serio/ioc3kbd.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SGI IOC3 PS/2 controller driver for linux
+ *
+ * Copyright (C) 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de>
+ *
+ * Based on code Copyright (C) 2005 Stanislaw Skowronek <skylark@unaligned.org>
+ *               Copyright (C) 2009 Johannes Dickgreber <tanzy@gmx.de>
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/serio.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/sn/ioc3.h>
+
+struct ioc3kbd_data {
+	struct ioc3_serioregs __iomem *regs;
+	struct serio *kbd, *aux;
+	int irq;
+};
+
+static int ioc3kbd_write(struct serio *dev, u8 val)
+{
+	struct ioc3kbd_data *d = dev->port_data;
+	unsigned long timeout = 0;
+	u32 mask;
+
+	mask = (dev == d->aux) ? KM_CSR_M_WRT_PEND : KM_CSR_K_WRT_PEND;
+	while ((readl(&d->regs->km_csr) & mask) && (timeout < 1000)) {
+		udelay(100);
+		timeout++;
+	}
+
+	if (timeout >= 1000)
+		return -ETIMEDOUT;
+
+	writel(val, dev == d->aux ? &d->regs->m_wd : &d->regs->k_wd);
+
+	return 0;
+}
+
+static irqreturn_t ioc3kbd_intr(int itq, void *dev_id)
+{
+	struct ioc3kbd_data *d = dev_id;
+	u32 data_k, data_m;
+
+	data_k = readl(&d->regs->k_rd);
+	data_m = readl(&d->regs->m_rd);
+
+	if (data_k & KM_RD_VALID_0)
+		serio_interrupt(d->kbd, (data_k >> KM_RD_DATA_0_SHIFT) & 0xff,
+				0);
+	if (data_k & KM_RD_VALID_1)
+		serio_interrupt(d->kbd, (data_k >> KM_RD_DATA_1_SHIFT) & 0xff,
+				0);
+	if (data_k & KM_RD_VALID_2)
+		serio_interrupt(d->kbd, (data_k >> KM_RD_DATA_2_SHIFT) & 0xff,
+				0);
+	if (data_m & KM_RD_VALID_0)
+		serio_interrupt(d->aux, (data_m >> KM_RD_DATA_0_SHIFT) & 0xff,
+				0);
+	if (data_m & KM_RD_VALID_1)
+		serio_interrupt(d->aux, (data_m >> KM_RD_DATA_1_SHIFT) & 0xff,
+				0);
+	if (data_m & KM_RD_VALID_2)
+		serio_interrupt(d->aux, (data_m >> KM_RD_DATA_2_SHIFT) & 0xff,
+				0);
+
+	return IRQ_HANDLED;
+}
+
+static int ioc3kbd_probe(struct platform_device *pdev)
+{
+	struct ioc3_serioregs __iomem *regs;
+	struct device *dev = &pdev->dev;
+	struct ioc3kbd_data *d;
+	struct serio *sk, *sa;
+	int irq, ret;
+
+	regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return -ENXIO;
+
+	d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
+	if (!d)
+		return -ENOMEM;
+
+	sk = kzalloc(sizeof(*sk), GFP_KERNEL);
+	if (!sk)
+		return -ENOMEM;
+
+	sa = kzalloc(sizeof(*sa), GFP_KERNEL);
+	if (!sa) {
+		kfree(sk);
+		return -ENOMEM;
+	}
+
+	sk->id.type = SERIO_8042;
+	sk->write = ioc3kbd_write;
+	snprintf(sk->name, sizeof(sk->name), "IOC3 keyboard %d", pdev->id);
+	snprintf(sk->phys, sizeof(sk->phys), "ioc3/serio%dkbd", pdev->id);
+	sk->port_data = d;
+	sk->dev.parent = dev;
+
+	sa->id.type = SERIO_8042;
+	sa->write = ioc3kbd_write;
+	snprintf(sa->name, sizeof(sa->name), "IOC3 auxiliary %d", pdev->id);
+	snprintf(sa->phys, sizeof(sa->phys), "ioc3/serio%daux", pdev->id);
+	sa->port_data = d;
+	sa->dev.parent = dev;
+
+	d->regs = regs;
+	d->kbd = sk;
+	d->aux = sa;
+	d->irq = irq;
+
+	platform_set_drvdata(pdev, d);
+	serio_register_port(d->kbd);
+	serio_register_port(d->aux);
+
+	ret = request_irq(irq, ioc3kbd_intr, IRQF_SHARED, "ioc3-kbd", d);
+	if (ret) {
+		dev_err(dev, "could not request IRQ %d\n", irq);
+		serio_unregister_port(d->kbd);
+		serio_unregister_port(d->aux);
+		return ret;
+	}
+	return 0;
+}
+
+static int ioc3kbd_remove(struct platform_device *pdev)
+{
+	struct ioc3kbd_data *d = platform_get_drvdata(pdev);
+
+	free_irq(d->irq, d);
+	serio_unregister_port(d->kbd);
+	serio_unregister_port(d->aux);
+	return 0;
+}
+
+static struct platform_driver ioc3kbd_driver = {
+	.probe          = ioc3kbd_probe,
+	.remove         = ioc3kbd_remove,
+	.driver = {
+		.name = "ioc3-kbd",
+	},
+};
+module_platform_driver(ioc3kbd_driver);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
+MODULE_DESCRIPTION("SGI IOC3 serio driver");
+MODULE_LICENSE("GPL");
-- 
2.13.7


^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers
  2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
                   ` (16 preceding siblings ...)
  2019-08-19 16:31 ` [PATCH v5 17/17] Input: add IOC3 serio driver Thomas Bogendoerfer
@ 2019-08-19 23:51 ` Jakub Kicinski
  17 siblings, 0 replies; 29+ messages in thread
From: Jakub Kicinski @ 2019-08-19 23:51 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 18:31:23 +0200, Thomas Bogendoerfer wrote:
>  - requested by Jakub I've splitted ioc3 ethernet driver changes into
>    more steps to make the transition more visible; 

Thanks a lot for doing that!

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 09/17] net: sgi: ioc3-eth: use defines for constants dealing with desc rings
  2019-08-19 16:31 ` [PATCH v5 09/17] net: sgi: ioc3-eth: use defines for constants dealing with desc rings Thomas Bogendoerfer
@ 2019-08-19 23:53   ` Jakub Kicinski
  0 siblings, 0 replies; 29+ messages in thread
From: Jakub Kicinski @ 2019-08-19 23:53 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 18:31:32 +0200, Thomas Bogendoerfer wrote:
> Descriptor ring sizes of the IOC3 are more or less fixed size. To
> make clearer where there is a relation to ring sizes use defines.
> 
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>

Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling
  2019-08-19 16:31 ` [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling Thomas Bogendoerfer
@ 2019-08-19 23:55   ` Jakub Kicinski
  2019-08-21 14:28     ` Thomas Bogendoerfer
  0 siblings, 1 reply; 29+ messages in thread
From: Jakub Kicinski @ 2019-08-19 23:55 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 18:31:33 +0200, Thomas Bogendoerfer wrote:
> Buffers alloacted by alloc_skb() are already cache aligned so there
> is no need for an extra align done by ioc3_alloc_skb. And instead
> of skb_put/skb_trim simply use one skb_put after frame size is known
> during receive.
> 
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
> ---
>  drivers/net/ethernet/sgi/ioc3-eth.c | 50 ++++++++-----------------------------
>  1 file changed, 11 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
> index c875640926d6..d862f28887f9 100644
> --- a/drivers/net/ethernet/sgi/ioc3-eth.c
> +++ b/drivers/net/ethernet/sgi/ioc3-eth.c
> @@ -11,7 +11,6 @@
>   *
>   * To do:
>   *
> - *  o Handle allocation failures in ioc3_alloc_skb() more gracefully.
>   *  o Handle allocation failures in ioc3_init_rings().
>   *  o Use prefetching for large packets.  What is a good lower limit for
>   *    prefetching?
> @@ -72,6 +71,12 @@
>  #define TX_RING_ENTRIES		128
>  #define TX_RING_MASK		(TX_RING_ENTRIES - 1)
>  
> +/* BEWARE: The IOC3 documentation documents the size of rx buffers as
> + * 1644 while it's actually 1664.  This one was nasty to track down...
> + */
> +#define RX_OFFSET		10
> +#define RX_BUF_SIZE		1664
> +
>  #define ETCSR_FD   ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
>  #define ETCSR_HD   ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
>  
> @@ -111,31 +116,6 @@ static void ioc3_init(struct net_device *dev);
>  static const char ioc3_str[] = "IOC3 Ethernet";
>  static const struct ethtool_ops ioc3_ethtool_ops;
>  
> -/* We use this to acquire receive skb's that we can DMA directly into. */
> -
> -#define IOC3_CACHELINE	128UL

Is the cache line on the platform this driver works on 128B?
This looks like a DMA engine alignment requirement, more than an
optimization.

The comment in __alloc_skb() says:

	/* We do our best to align skb_shared_info on a separate cache
	 * line. It usually works because kmalloc(X > SMP_CACHE_BYTES) gives
	 * aligned memory blocks, unless SLUB/SLAB debug is enabled.
	 * Both skb->head and skb_shared_info are cache line aligned.
	 */

note the "unless".

> -static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
> -{
> -	return (~addr + 1) & (IOC3_CACHELINE - 1UL);
> -}
> -
> -static inline struct sk_buff *ioc3_alloc_skb(unsigned long length,
> -					     unsigned int gfp_mask)
> -{
> -	struct sk_buff *skb;
> -
> -	skb = alloc_skb(length + IOC3_CACHELINE - 1, gfp_mask);
> -	if (likely(skb)) {
> -		int offset = aligned_rx_skb_addr((unsigned long)skb->data);
> -
> -		if (offset)
> -			skb_reserve(skb, offset);
> -	}
> -
> -	return skb;
> -}
> -
>  static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
>  {
>  #ifdef CONFIG_SGI_IP27
> @@ -148,12 +128,6 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
>  #endif
>  }
>  
> -/* BEWARE: The IOC3 documentation documents the size of rx buffers as
> - * 1644 while it's actually 1664.  This one was nasty to track down ...
> - */
> -#define RX_OFFSET		10
> -#define RX_BUF_ALLOC_SIZE	(1664 + RX_OFFSET + IOC3_CACHELINE)
> -
>  #define IOC3_SIZE 0x100000
>  
>  static inline u32 mcr_pack(u32 pulse, u32 sample)
> @@ -534,10 +508,10 @@ static inline void ioc3_rx(struct net_device *dev)
>  		err = be32_to_cpu(rxb->err);		/* It's valid ...  */
>  		if (err & ERXBUF_GOODPKT) {
>  			len = ((w0 >> ERXBUF_BYTECNT_SHIFT) & 0x7ff) - 4;
> -			skb_trim(skb, len);
> +			skb_put(skb, len);
>  			skb->protocol = eth_type_trans(skb, dev);
>  
> -			new_skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
> +			new_skb = alloc_skb(RX_BUF_SIZE, GFP_ATOMIC);
>  			if (!new_skb) {
>  				/* Ouch, drop packet and just recycle packet
>  				 * to keep the ring filled.
> @@ -546,6 +520,7 @@ static inline void ioc3_rx(struct net_device *dev)
>  				new_skb = skb;
>  				goto next;
>  			}
> +			new_skb->dev = dev;

Assigning dev pointer seems unrelated to the rest of the patch?

>  			if (likely(dev->features & NETIF_F_RXCSUM))
>  				ioc3_tcpudp_checksum(skb,
> @@ -556,8 +531,6 @@ static inline void ioc3_rx(struct net_device *dev)
>  
>  			ip->rx_skbs[rx_entry] = NULL;	/* Poison  */
>  
> -			/* Because we reserve afterwards. */
> -			skb_put(new_skb, (1664 + RX_OFFSET));
>  			rxb = (struct ioc3_erxbuf *)new_skb->data;
>  			skb_reserve(new_skb, RX_OFFSET);
>  
> @@ -846,16 +819,15 @@ static void ioc3_alloc_rings(struct net_device *dev)
>  		for (i = 0; i < RX_BUFFS; i++) {
>  			struct sk_buff *skb;
>  
> -			skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
> +			skb = alloc_skb(RX_BUF_SIZE, GFP_ATOMIC);
>  			if (!skb) {
>  				show_free_areas(0, NULL);
>  				continue;
>  			}
> +			skb->dev = dev;
>  
>  			ip->rx_skbs[i] = skb;
>  
> -			/* Because we reserve afterwards. */
> -			skb_put(skb, (1664 + RX_OFFSET));
>  			rxb = (struct ioc3_erxbuf *)skb->data;
>  			rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
>  			skb_reserve(skb, RX_OFFSET);


^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list
  2019-08-19 16:31 ` [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list Thomas Bogendoerfer
@ 2019-08-20  0:04   ` Jakub Kicinski
  2019-08-21 12:40     ` Thomas Bogendoerfer
  0 siblings, 1 reply; 29+ messages in thread
From: Jakub Kicinski @ 2019-08-20  0:04 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 18:31:34 +0200, Thomas Bogendoerfer wrote:
> netif_stop_queue()/netif_wake_qeue() aren't needed for changing
> multicast filters. Use spinlocks instead for proper protection
> of private struct.
> 
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
> ---
>  drivers/net/ethernet/sgi/ioc3-eth.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
> index d862f28887f9..7f85a3bfef14 100644
> --- a/drivers/net/ethernet/sgi/ioc3-eth.c
> +++ b/drivers/net/ethernet/sgi/ioc3-eth.c
> @@ -1542,8 +1542,7 @@ static void ioc3_set_multicast_list(struct net_device *dev)
>  	struct netdev_hw_addr *ha;
>  	u64 ehar = 0;
>  
> -	netif_stop_queue(dev);				/* Lock out others. */
> -
> +	spin_lock_irq(&ip->ioc3_lock);

What does this lock protect? 🤔 No question that stopping TX queues
makes little sense, but this function is only called from
ndo_set_rx_mode(), so with rtnl_lock held. 

I thought it may protect ip->emcr, but that one is accessed with no
locking from the ioc3_timer() -> ioc3_setup_duplex() path..

>  	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous.  */
>  		ip->emcr |= EMCR_PROMISC;
>  		writel(ip->emcr, &regs->emcr);
> @@ -1572,7 +1571,7 @@ static void ioc3_set_multicast_list(struct net_device *dev)
>  		writel(ip->ehar_l, &regs->ehar_l);
>  	}
>  
> -	netif_wake_queue(dev);			/* Let us get going again. */
> +	spin_unlock_irq(&ip->ioc3_lock);
>  }
>  
>  module_pci_driver(ioc3_driver);


^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 12/17] net: sgi: ioc3-eth: use dma-direct for dma allocations
  2019-08-19 16:31 ` [PATCH v5 12/17] net: sgi: ioc3-eth: use dma-direct for dma allocations Thomas Bogendoerfer
@ 2019-08-20  0:07   ` Jakub Kicinski
  0 siblings, 0 replies; 29+ messages in thread
From: Jakub Kicinski @ 2019-08-20  0:07 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 18:31:35 +0200, Thomas Bogendoerfer wrote:
> @@ -1386,18 +1427,24 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
>  		unsigned long b2 = (data | 0x3fffUL) + 1UL;
>  		unsigned long s1 = b2 - data;
>  		unsigned long s2 = data + len - b2;
> +		dma_addr_t d;
>  
>  		desc->cmd    = cpu_to_be32(len | ETXD_INTWHENDONE |
>  					   ETXD_B1V | ETXD_B2V | w0);
>  		desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) |
>  					   (s2 << ETXD_B2CNT_SHIFT));
> -		desc->p1     = cpu_to_be64(ioc3_map(skb->data, 1));
> -		desc->p2     = cpu_to_be64(ioc3_map((void *)b2, 1));
> +		d = dma_map_single(ip->dma_dev, skb->data, s1, DMA_TO_DEVICE);

You'll need to check the DMA address with dma_mapping_error(dev, addr),
otherwise static checkers will get upset.

> +		desc->p1     = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF));
> +		d = dma_map_single(ip->dma_dev, (void *)b2, s1, DMA_TO_DEVICE);
> +		desc->p2     = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF));

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip
  2019-08-19 16:31 ` [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip Thomas Bogendoerfer
@ 2019-08-20  6:23   ` Alexandre Belloni
  2019-08-20  8:17     ` Thomas Bogendoerfer
  0 siblings, 1 reply; 29+ messages in thread
From: Alexandre Belloni @ 2019-08-20  6:23 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Greg Kroah-Hartman, Jiri Slaby,
	Evgeniy Polyakov, linux-doc, linux-kernel, linux-mips,
	linux-input, netdev, linux-rtc, linux-serial

Hi,

On 19/08/2019 18:31:38+0200, Thomas Bogendoerfer wrote:
> diff --git a/drivers/mfd/ioc3.c b/drivers/mfd/ioc3.c
> new file mode 100644
> index 000000000000..5bcb3461a189
> --- /dev/null
> +++ b/drivers/mfd/ioc3.c
> @@ -0,0 +1,586 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * SGI IOC3 multifunction device driver
> + *
> + * Copyright (C) 2018, 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de>
> + *
> + * Based on work by:
> + *   Stanislaw Skowronek <skylark@unaligned.org>
> + *   Joshua Kinard <kumba@gentoo.org>
> + *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
> + *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/errno.h>
> +#include <linux/interrupt.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/platform_data/sgi-w1.h>
> +#include <linux/rtc/ds1685.h>
I don't think this include is necessary.


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip
  2019-08-20  6:23   ` Alexandre Belloni
@ 2019-08-20  8:17     ` Thomas Bogendoerfer
  0 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-20  8:17 UTC (permalink / raw)
  To: Alexandre Belloni
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Greg Kroah-Hartman, Jiri Slaby,
	Evgeniy Polyakov, linux-doc, linux-kernel, linux-mips,
	linux-input, netdev, linux-rtc, linux-serial

On Tue, 20 Aug 2019 08:23:08 +0200
Alexandre Belloni <alexandre.belloni@bootlin.com> wrote:
> On 19/08/2019 18:31:38+0200, Thomas Bogendoerfer wrote:
> > diff --git a/drivers/mfd/ioc3.c b/drivers/mfd/ioc3.c
> > new file mode 100644
> > index 000000000000..5bcb3461a189
> > --- /dev/null
> > +++ b/drivers/mfd/ioc3.c
> > @@ -0,0 +1,586 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * SGI IOC3 multifunction device driver
> > + *
> > + * Copyright (C) 2018, 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de>
> > + *
> > + * Based on work by:
> > + *   Stanislaw Skowronek <skylark@unaligned.org>
> > + *   Joshua Kinard <kumba@gentoo.org>
> > + *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
> > + *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
> > + */
> > +
> > +#include <linux/delay.h>
> > +#include <linux/errno.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/mfd/core.h>
> > +#include <linux/module.h>
> > +#include <linux/pci.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/platform_data/sgi-w1.h>
> > +#include <linux/rtc/ds1685.h>
> I don't think this include is necessary.

you are right. I'll move it to the patch where IP30 systemboard gets added.

Thanks,
Thomas.

-- 
SUSE Linux GmbH
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list
  2019-08-20  0:04   ` Jakub Kicinski
@ 2019-08-21 12:40     ` Thomas Bogendoerfer
  0 siblings, 0 replies; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-21 12:40 UTC (permalink / raw)
  To: Jakub Kicinski
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 17:04:53 -0700
Jakub Kicinski <jakub.kicinski@netronome.com> wrote:

> On Mon, 19 Aug 2019 18:31:34 +0200, Thomas Bogendoerfer wrote:
> > netif_stop_queue()/netif_wake_qeue() aren't needed for changing
> > multicast filters. Use spinlocks instead for proper protection
> > of private struct.
> > 
>
> I thought it may protect ip->emcr, but that one is accessed with no
> locking from the ioc3_timer() -> ioc3_setup_duplex() path..

it should protect ip->emcr ... I'll add spin_lock/unlock to setup_duplex and
respin the patch.

Thomas.

-- 
SUSE Linux GmbH
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling
  2019-08-19 23:55   ` Jakub Kicinski
@ 2019-08-21 14:28     ` Thomas Bogendoerfer
  2019-08-21 20:37       ` Jakub Kicinski
  0 siblings, 1 reply; 29+ messages in thread
From: Thomas Bogendoerfer @ 2019-08-21 14:28 UTC (permalink / raw)
  To: Jakub Kicinski
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial

On Mon, 19 Aug 2019 16:55:22 -0700
Jakub Kicinski <jakub.kicinski@netronome.com> wrote:

> On Mon, 19 Aug 2019 18:31:33 +0200, Thomas Bogendoerfer wrote:
> > Buffers alloacted by alloc_skb() are already cache aligned so there
> > is no need for an extra align done by ioc3_alloc_skb. And instead
> > of skb_put/skb_trim simply use one skb_put after frame size is known
> > during receive.
> [...]  
> > -/* We use this to acquire receive skb's that we can DMA directly into. */
> > -
> > -#define IOC3_CACHELINE	128UL
> 
> Is the cache line on the platform this driver works on 128B?

right now yes, in theory IOC3 CAD DUO cards might work in SGI O2 systems,
but the current Linux PCI implementation for O2 will not detect that card.
On X86 usually the BIOS will choke up on that cards.

> This looks like a DMA engine alignment requirement, more than an
> optimization.

that true, there are two constraints for the rx buffers, start must be aligned
to 128 bytes and a buffer must not cross a 16kbyte boundary. I was already
thinking of allocating pages and chop them up. Is there a Linux API available,
which could help for implementing this ?

I'll probably drop this patch or only change the skb_put stuff plus RX_BUF_SIZE
define.

Thomas.

-- 
SUSE Linux GmbH
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling
  2019-08-21 14:28     ` Thomas Bogendoerfer
@ 2019-08-21 20:37       ` Jakub Kicinski
  0 siblings, 0 replies; 29+ messages in thread
From: Jakub Kicinski @ 2019-08-21 20:37 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial,
	Jesper Dangaard Brouer

On Wed, 21 Aug 2019 16:28:47 +0200, Thomas Bogendoerfer wrote:
> > This looks like a DMA engine alignment requirement, more than an
> > optimization.  
> 
> that true, there are two constraints for the rx buffers, start must be aligned
> to 128 bytes and a buffer must not cross a 16kbyte boundary. I was already
> thinking of allocating pages and chop them up. Is there a Linux API available,
> which could help for implementing this ?
> 
> I'll probably drop this patch or only change the skb_put stuff plus RX_BUF_SIZE
> define.

Sounds a little like frag allocator (napi_alloc_frag()/
netdev_alloc_frag()), but I'm not sure you'd have sufficient control
to skip over the 16k boundary.. Perhaps others have better suggestions.

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [PATCH v5 04/17] MIPS: PCI: refactor ioc3 special handling
  2019-08-19 16:31 ` [PATCH v5 04/17] MIPS: PCI: refactor ioc3 special handling Thomas Bogendoerfer
@ 2019-09-03  9:10   ` Paul Burton
  0 siblings, 0 replies; 29+ messages in thread
From: Paul Burton @ 2019-09-03  9:10 UTC (permalink / raw)
  To: Thomas Bogendoerfer
  Cc: Jonathan Corbet, Ralf Baechle, Paul Burton, James Hogan,
	Dmitry Torokhov, Lee Jones, David S. Miller, Srinivas Kandagatla,
	Alessandro Zummo, Alexandre Belloni, Greg Kroah-Hartman,
	Jiri Slaby, Evgeniy Polyakov, linux-doc, linux-kernel,
	linux-mips, linux-input, netdev, linux-rtc, linux-serial,
	linux-mips

Hello,

Thomas Bogendoerfer wrote:
> Refactored code to only have one ioc3 special handling for read
> access and one for write access.

Applied to mips-next.

> commit 813cafc4109c
> https://git.kernel.org/mips/c/813cafc4109c
> 
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
> Signed-off-by: Paul Burton <paul.burton@mips.com>

Thanks,
    Paul

[ This message was auto-generated; if you believe anything is incorrect
  then please email paul.burton@mips.com to report it. ]

^ permalink raw reply	[flat|nested] 29+ messages in thread

end of thread, back to index

Thread overview: 29+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-19 16:31 [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 01/17] w1: add 1-wire master driver for IP block found in SGI ASICs Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 02/17] w1: add DS2501, DS2502, DS2505 EPROM device driver Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 03/17] nvmem: core: add nvmem_device_find Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 04/17] MIPS: PCI: refactor ioc3 special handling Thomas Bogendoerfer
2019-09-03  9:10   ` Paul Burton
2019-08-19 16:31 ` [PATCH v5 05/17] MIPS: PCI: use information from 1-wire PROM for IOC3 detection Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 06/17] MIPS: SGI-IP27: remove ioc3 ethernet init Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 07/17] MIPS: SGI-IP27: restructure ioc3 register access Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 08/17] net: sgi: ioc3-eth: remove checkpatch errors/warning Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 09/17] net: sgi: ioc3-eth: use defines for constants dealing with desc rings Thomas Bogendoerfer
2019-08-19 23:53   ` Jakub Kicinski
2019-08-19 16:31 ` [PATCH v5 10/17] net: sgi: ioc3-eth: rework skb rx handling Thomas Bogendoerfer
2019-08-19 23:55   ` Jakub Kicinski
2019-08-21 14:28     ` Thomas Bogendoerfer
2019-08-21 20:37       ` Jakub Kicinski
2019-08-19 16:31 ` [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list Thomas Bogendoerfer
2019-08-20  0:04   ` Jakub Kicinski
2019-08-21 12:40     ` Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 12/17] net: sgi: ioc3-eth: use dma-direct for dma allocations Thomas Bogendoerfer
2019-08-20  0:07   ` Jakub Kicinski
2019-08-19 16:31 ` [PATCH v5 13/17] net: sgi: ioc3-eth: use csum_fold Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 14/17] net: sgi: ioc3-eth: Fix IPG settings Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 15/17] mfd: ioc3: Add driver for SGI IOC3 chip Thomas Bogendoerfer
2019-08-20  6:23   ` Alexandre Belloni
2019-08-20  8:17     ` Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 16/17] MIPS: SGI-IP27: fix readb/writeb addressing Thomas Bogendoerfer
2019-08-19 16:31 ` [PATCH v5 17/17] Input: add IOC3 serio driver Thomas Bogendoerfer
2019-08-19 23:51 ` [PATCH v5 00/17] Use MFD framework for SGI IOC3 drivers Jakub Kicinski

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