* Re: [PATCH V9 1/2] intel_pmc_ipc: update acpi resource structure for Punit
2015-12-10 18:21 [PATCH V9 1/2] intel_pmc_ipc: update acpi resource structure for Punit Qipeng Zha
@ 2015-12-10 11:13 ` Andy Shevchenko
2015-12-10 22:59 ` Darren Hart
2015-12-10 18:21 ` [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver Qipeng Zha
1 sibling, 1 reply; 7+ messages in thread
From: Andy Shevchenko @ 2015-12-10 11:13 UTC (permalink / raw)
To: Qipeng Zha, platform-driver-x86; +Cc: dvhart
On Fri, 2015-12-11 at 02:21 +0800, Qipeng Zha wrote:
> BIOS restructure exported memory resources for Punit
> in acpi table, So update resources for Punit.
>
> Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
>
Almost. See below.
> ---
> change in v9
> rename indexes of all acpi resources;
> add comments for punit_res;
> ---
> drivers/platform/x86/intel_pmc_ipc.c | 114 ++++++++++++++++++++++++-
> ----------
> 1 file changed, 80 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/platform/x86/intel_pmc_ipc.c
> b/drivers/platform/x86/intel_pmc_ipc.c
> index 28b2a12..00812a4 100644
> --- a/drivers/platform/x86/intel_pmc_ipc.c
> +++ b/drivers/platform/x86/intel_pmc_ipc.c
> @@ -68,8 +68,12 @@
> #define PLAT_RESOURCE_IPC_INDEX 0
> #define PLAT_RESOURCE_IPC_SIZE 0x1000
> #define PLAT_RESOURCE_GCR_SIZE 0x1000
> -#define PLAT_RESOURCE_PUNIT_DATA_INDEX 1
> -#define PLAT_RESOURCE_PUNIT_INTER_INDEX 2
> +#define PLAT_RESOURCE_BIOS_DATA_INDEX 1
> +#define PLAT_RESOURCE_BIOS_INTER_INDEX 2
Since there is a comment and new version will be anticipated I also
would like to propose to change INTER to IFACE because latter more
particular. Darren?
> +#define PLAT_RESOURCE_ISP_DATA_INDEX 4
> +#define PLAT_RESOURCE_ISP_INTER_INDEX 5
> +#define PLAT_RESOURCE_GTD_DATA_INDEX 6
> +#define PLAT_RESOURCE_GTD_INTER_INDEX 7
> #define PLAT_RESOURCE_ACPI_IO_INDEX 0
>
> /*
> @@ -105,10 +109,6 @@ static struct intel_pmc_ipc_dev {
> int gcr_size;
>
> /* punit */
> - resource_size_t punit_base;
> - int punit_size;
> - resource_size_t punit_base2;
> - int punit_size2;
> struct platform_device *punit_dev;
> } ipcdev;
>
> @@ -444,9 +444,22 @@ static const struct attribute_group
> intel_ipc_group = {
> .attrs = intel_ipc_attrs,
> };
>
> -#define PUNIT_RESOURCE_INTER 1
> -static struct resource punit_res[] = {
> - /* Punit */
> +static struct resource punit_res_array[] = {
> + /* Punit BIOS */
> + {
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .flags = IORESOURCE_MEM,
> + },
> + /* Punit ISP */
> + {
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .flags = IORESOURCE_MEM,
> + },
> + /* Punit GTD */
> {
> .flags = IORESOURCE_MEM,
> },
> @@ -481,7 +494,6 @@ static struct itco_wdt_platform_data tco_info = {
> static int ipc_create_punit_device(void)
> {
> struct platform_device *pdev;
> - struct resource *res;
> int ret;
>
> pdev = platform_device_alloc(PUNIT_DEVICE_NAME, -1);
> @@ -491,17 +503,8 @@ static int ipc_create_punit_device(void)
> }
>
> pdev->dev.parent = ipcdev.dev;
> -
> - res = punit_res;
> - res->start = ipcdev.punit_base;
> - res->end = res->start + ipcdev.punit_size - 1;
> -
> - res = punit_res + PUNIT_RESOURCE_INTER;
> - res->start = ipcdev.punit_base2;
> - res->end = res->start + ipcdev.punit_size2 - 1;
> -
> - ret = platform_device_add_resources(pdev, punit_res,
> - ARRAY_SIZE(punit_res));
> + ret = platform_device_add_resources(pdev, punit_res_array,
> + ARRAY_SIZE(punit_res_arr
> ay));
> if (ret) {
> dev_err(ipcdev.dev, "Failed to add platform punit
> resources\n");
> goto err;
> @@ -590,7 +593,7 @@ static int ipc_create_pmc_devices(void)
>
> static int ipc_plat_get_res(struct platform_device *pdev)
> {
> - struct resource *res;
> + struct resource *res, *punit_res;
> void __iomem *addr;
> int size;
>
> @@ -606,28 +609,71 @@ static int ipc_plat_get_res(struct
> platform_device *pdev)
> dev_info(&pdev->dev, "io res: %llx %x\n",
> (long long)res->start, (int)resource_size(res));
>
> + /* This is index 0 to cover BIOS data register */
> + punit_res = punit_res_array;
> res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_PUNIT_DATA_INDEX);
> + PLAT_RESOURCE_BIOS_DATA_INDEX);
> if (!res) {
> - dev_err(&pdev->dev, "Failed to get punit
> resource\n");
> + dev_err(&pdev->dev, "Failed to get res of punit BIOS
> data\n");
> return -ENXIO;
> }
> - size = resource_size(res);
> - ipcdev.punit_base = res->start;
> - ipcdev.punit_size = size;
> - dev_info(&pdev->dev, "punit data res: %llx %x\n",
> + *punit_res = *res;
> + dev_info(&pdev->dev, "punit BIOS data res: %llx %x\n",
> (long long)res->start, (int)resource_size(res));
>
> res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_PUNIT_INTER_INDEX)
> ;
> + PLAT_RESOURCE_BIOS_INTER_INDEX);
> if (!res) {
> - dev_err(&pdev->dev, "Failed to get punit inter
> resource\n");
> + dev_err(&pdev->dev, "Failed to get res of punit BIOS
> inter\n");
> return -ENXIO;
> }
> - size = resource_size(res);
> - ipcdev.punit_base2 = res->start;
> - ipcdev.punit_size2 = size;
> - dev_info(&pdev->dev, "punit interface res: %llx %x\n",
> + /* This is index 1 to cover BIOS interface register */
> + *++punit_res = *res;
> + dev_info(&pdev->dev, "punit BIOS interface res: %llx %x\n",
> + (long long)res->start, (int)resource_size(res));
There is a specifier to print struct resource, please use it instead.
%pR IIRC.
Same for all similar cases below.
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_ISP_DATA_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get res of punit ISP
> data\n");
> + return -ENXIO;
> + }
> + /* This is index 2 to cover ISP data register */
> + *++punit_res = *res;
> + dev_info(&pdev->dev, "punit ISP data res: %llx %x\n",
> + (long long)res->start, (int)resource_size(res));
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_ISP_INTER_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get res of punit ISP
> inter\n");
> + return -ENXIO;
> + }
> + /* This is index 3 to cover ISP interface register */
> + *++punit_res = *res;
> + dev_info(&pdev->dev, "punit ISP interface res: %llx %x\n",
> + (long long)res->start, (int)resource_size(res));
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_GTD_DATA_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get res of punit GTD
> data\n");
> + return -ENXIO;
> + }
> + /* This is index 4 to cover GTD data register */
> + *++punit_res = *res;
> + dev_info(&pdev->dev, "punit GTD data res: %llx %x\n",
> + (long long)res->start, (int)resource_size(res));
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_GTD_INTER_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get res of punit GTD
> inter\n");
> + return -ENXIO;
> + }
> + /* This is index 5 to cover GTD interface register */
> + *++punit_res = *res;
> + dev_info(&pdev->dev, "punit GTD interface res: %llx %x\n",
> (long long)res->start, (int)resource_size(res));
>
> res = platform_get_resource(pdev, IORESOURCE_MEM,
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver
2015-12-10 18:21 ` [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver Qipeng Zha
@ 2015-12-10 11:23 ` Andy Shevchenko
2015-12-10 23:01 ` Darren Hart
0 siblings, 1 reply; 7+ messages in thread
From: Andy Shevchenko @ 2015-12-10 11:23 UTC (permalink / raw)
To: Qipeng Zha, platform-driver-x86; +Cc: dvhart
On Fri, 2015-12-11 at 02:21 +0800, Qipeng Zha wrote:
> This driver provides support for P-Unit mailbox IPC on Intel
> platforms.
> The heart of the P-Unit is the Foxton microcontroller and its
> firmware,
> which provide mailbox interface for power management usage.
>
> Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Couple of nitpicks below, otherwise finally my tag
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>
> ---
> change in v9
> remove non-necessary cast for void pointer;
> remove redundant error messages.
>
> change in v8
> Change the way to get three IPCs's resources due to udpated acpi
> entries,
>
> In the new acpi resources layout, two entries for each IPC, one for
> data
> and one for interface.
>
> change in v7
> Update ipc_err_string()'s return type to "const char *" from "char
> *";
> Add terminator in acpi id array.
>
> change in v6
> Update header file;
> Update interface of lowlevel register access;
> Restructure implementation of two command functions;
> Save IPC private data pointer to pdev's priv;
>
> change in v5
> Fix commend style in header file;
> Replace EINVAL with ENODEV in stub functions;
> Replace ipc_err_sources array with ipc_err_string function;
> Correct comments: "if invalid" -> "if not used";
> Propagate return error of devm_request_irq.
>
> change in v4
> Fix two code style issues: make /* as a whole line and replace
> "return ret" with "goto out";
> Replace -EINVAL with -ENXIO for failures due to resource.
>
> change in v3
> Fix compile issue in intel_punit_ipc.h, it happened when built-in
> and the header file is included in other source file.
>
> change in v2
> Fix issues in code style and comments;
> Remove "default y" in Kconfig;
> Remove some header files;
> Replace request_mem_region with devm_request_mem_region,
> and same for request_irq;
> Change to use prefix of IPC_PUNIT_ to define commands.
> ---
> MAINTAINERS | 4 +-
> arch/x86/include/asm/intel_punit_ipc.h | 101 ++++++++++
> drivers/platform/x86/Kconfig | 6 +
> drivers/platform/x86/Makefile | 1 +
> drivers/platform/x86/intel_punit_ipc.c | 336
> +++++++++++++++++++++++++++++++++
> 5 files changed, 447 insertions(+), 1 deletion(-)
> create mode 100644 arch/x86/include/asm/intel_punit_ipc.h
> create mode 100644 drivers/platform/x86/intel_punit_ipc.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 5192700..333a022 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5683,12 +5683,14 @@ F: drivers/dma/mic_x100_dma.c
> F: drivers/dma/mic_x100_dma.h
> F Documentation/mic/
>
> -INTEL PMC IPC DRIVER
> +INTEL PMC/P-Unit IPC DRIVER
> M: Zha Qipeng<qipeng.zha@intel.com>
> L: platform-driver-x86@vger.kernel.org
> S: Maintained
> F: drivers/platform/x86/intel_pmc_ipc.c
> +F: drivers/platform/x86/intel_punit_ipc.c
> F: arch/x86/include/asm/intel_pmc_ipc.h
> +F: arch/x86/include/asm/intel_punit_ipc.h
>
> IOC3 ETHERNET DRIVER
> M: Ralf Baechle <ralf@linux-mips.org>
> diff --git a/arch/x86/include/asm/intel_punit_ipc.h
> b/arch/x86/include/asm/intel_punit_ipc.h
> new file mode 100644
> index 0000000..201eb9d
> --- /dev/null
> +++ b/arch/x86/include/asm/intel_punit_ipc.h
> @@ -0,0 +1,101 @@
> +#ifndef _ASM_X86_INTEL_PUNIT_IPC_H_
> +#define _ASM_X86_INTEL_PUNIT_IPC_H_
> +
> +/*
> + * Three types of 8bit P-Unit IPC commands are supported,
> + * bit[7:6]: [00]: BIOS; [01]: GTD; [10]: ISPD.
> + */
> +typedef enum {
> + BIOS_IPC = 0,
> + GTDRIVER_IPC,
> + ISPDRIVER_IPC,
> + RESERVED_IPC,
> +} IPC_TYPE;
> +
> +#define IPC_TYPE_OFFSET 6
> +#define IPC_PUNIT_BIOS_CMD_BASE (BIOS_IPC <<
> IPC_TYPE_OFFSET)
> +#define IPC_PUNIT_GTD_CMD_BASE (GTDDRIVER_IPC <<
> IPC_TYPE_OFFSET)
> +#define IPC_PUNIT_ISPD_CMD_BASE (ISPDRIVER_IPC <<
> IPC_TYPE_OFFSET)
> +#define IPC_PUNIT_CMD_TYPE_MASK (RESERVED_IPC <<
> IPC_TYPE_OFFSET)
> +
> +/* BIOS => Pcode commands */
> +#define IPC_PUNIT_BIOS_ZERO (IPC_PUNIT_BIOS_C
> MD_BASE | 0x00)
> +#define IPC_PUNIT_BIOS_VR_INTERFACE (IPC_PUNIT_BIOS_C
> MD_BASE | 0x01)
> +#define IPC_PUNIT_BIOS_READ_PCS (IPC_PUNIT_BI
> OS_CMD_BASE | 0x02)
> +#define IPC_PUNIT_BIOS_WRITE_PCS (IPC_PUNIT_BIOS_CMD_
> BASE | 0x03)
> +#define IPC_PUNIT_BIOS_READ_PCU_CONFIG (IPC_PUNIT_BIO
> S_CMD_BASE | 0x04)
> +#define IPC_PUNIT_BIOS_WRITE_PCU_CONFIG (IPC_PUNIT_BI
> OS_CMD_BASE | 0x05)
> +#define IPC_PUNIT_BIOS_READ_PL1_SETTING (IPC_PUNIT_BI
> OS_CMD_BASE | 0x06)
> +#define IPC_PUNIT_BIOS_WRITE_PL1_SETTING (IPC_PUNIT_BIOS_CMD_
> BASE | 0x07)
> +#define IPC_PUNIT_BIOS_TRIGGER_VDD_RAM (IPC_PUNIT_BIO
> S_CMD_BASE | 0x08)
> +#define IPC_PUNIT_BIOS_READ_TELE_INFO (IPC_PUNIT_BIOS
> _CMD_BASE | 0x09)
> +#define IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_C
> MD_BASE | 0x0a)
> +#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_
> CMD_BASE | 0x0b)
> +#define IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_C
> MD_BASE | 0x0c)
> +#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_
> CMD_BASE | 0x0d)
> +#define IPC_PUNIT_BIOS_READ_TELE_TRACE (IPC_PUNIT_BIO
> S_CMD_BASE | 0x0e)
> +#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE (IPC_PUNIT_BI
> OS_CMD_BASE | 0x0f)
> +#define IPC_PUNIT_BIOS_READ_TELE_EVENT (IPC_PUNIT_BIO
> S_CMD_BASE | 0x10)
> +#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT (IPC_PUNIT_BI
> OS_CMD_BASE | 0x11)
> +#define IPC_PUNIT_BIOS_READ_MODULE_TEMP (IPC_PUNIT_BI
> OS_CMD_BASE | 0x12)
> +#define IPC_PUNIT_BIOS_RESERVED (IPC_PUNIT_BI
> OS_CMD_BASE | 0x13)
> +#define IPC_PUNIT_BIOS_READ_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD_
> BASE | 0x14)
> +#define IPC_PUNIT_BIOS_WRITE_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD
> _BASE | 0x15)
> +#define IPC_PUNIT_BIOS_READ_RATIO_OVER (IPC_PUNIT_BIO
> S_CMD_BASE | 0x16)
> +#define IPC_PUNIT_BIOS_WRITE_RATIO_OVER (IPC_PUNIT_BI
> OS_CMD_BASE | 0x17)
> +#define IPC_PUNIT_BIOS_READ_VF_GL_CTRL (IPC_PUNIT_BIO
> S_CMD_BASE | 0x18)
> +#define IPC_PUNIT_BIOS_WRITE_VF_GL_CTRL (IPC_PUNIT_BI
> OS_CMD_BASE | 0x19)
> +#define IPC_PUNIT_BIOS_READ_FM_SOC_TEMP_THRESH (IPC_PUNIT_BIO
> S_CMD_BASE | 0x1a)
> +#define IPC_PUNIT_BIOS_WRITE_FM_SOC_TEMP_THRESH (IPC_PUNIT_BI
> OS_CMD_BASE | 0x1b)
> +
> +/* GT Driver => Pcode commands */
> +#define IPC_PUNIT_GTD_ZERO (IPC_PUNIT_GTD_CMD
> _BASE | 0x00)
> +#define IPC_PUNIT_GTD_CONFIG (IPC_PUNIT_GTD_C
> MD_BASE | 0x01)
> +#define IPC_PUNIT_GTD_READ_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD_
> CMD_BASE | 0x02)
> +#define IPC_PUNIT_GTD_WRITE_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD
> _CMD_BASE | 0x03)
> +#define IPC_PUNIT_GTD_GET_WM_VAL (IPC_PUNIT_GTD_CMD_B
> ASE | 0x06)
> +#define IPC_PUNIT_GTD_WRITE_CONFIG_WISHREQ (IPC_PUNIT_GTD_CMD
> _BASE | 0x07)
> +#define IPC_PUNIT_GTD_READ_REQ_DUTY_CYCLE (IPC_PUNIT_GTD_CMD_
> BASE | 0x16)
> +#define IPC_PUNIT_GTD_DIS_VOL_FREQ_CHG_REQUEST (IPC_PUNIT_GTD
> _CMD_BASE | 0x17)
> +#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_CTRL (IPC_PUNIT_GTD_CMD
> _BASE | 0x1a)
> +#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_TUNING (IPC_PUNIT_GTD_C
> MD_BASE | 0x1c)
> +
> +/* ISP Driver => Pcode commands */
> +#define IPC_PUNIT_ISPD_ZERO (IPC_PUNIT_ISPD_C
> MD_BASE | 0x00)
> +#define IPC_PUNIT_ISPD_CONFIG (IPC_PUNIT_ISPD
> _CMD_BASE | 0x01)
> +#define IPC_PUNIT_ISPD_GET_ISP_LTR_VAL (IPC_PUNIT_ISP
> D_CMD_BASE | 0x02)
> +#define IPC_PUNIT_ISPD_ACCESS_IU_FREQ_BOUNDS (IPC_PUNIT_ISPD_
> CMD_BASE | 0x03)
> +#define IPC_PUNIT_ISPD_READ_CDYN_LEVEL (IPC_PUNIT_ISP
> D_CMD_BASE | 0x04)
> +#define IPC_PUNIT_ISPD_WRITE_CDYN_LEVEL (IPC_PUNIT_IS
> PD_CMD_BASE | 0x05)
> +
> +/* Error codes */
> +#define IPC_PUNIT_ERR_SUCCESS 0
> +#define IPC_PUNIT_ERR_INVALID_CMD 1
> +#define IPC_PUNIT_ERR_INVALID_PARAMETER 2
> +#define IPC_PUNIT_ERR_CMD_TIMEOUT 3
> +#define IPC_PUNIT_ERR_CMD_LOCKED 4
> +#define IPC_PUNIT_ERR_INVALID_VR_ID 5
> +#define IPC_PUNIT_ERR_VR_ERR 6
> +
> +#if IS_ENABLED(CONFIG_INTEL_PUNIT_IPC)
> +
> +int intel_punit_ipc_simple_command(int cmd, int para1, int para2);
> +int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in,
> u32 *out);
> +
> +#else
> +
> +static inline int intel_punit_ipc_simple_command(int cmd,
> + int para1, int
> para2)
> +{
> + return -ENODEV;
> +}
> +
> +static inline int intel_punit_ipc_command(u32 cmd, u32 para1, u32
> para2,
> + u32 *in, u32 *out)
> +{
> + return -ENODEV;
> +}
> +
> +#endif /* CONFIG_INTEL_PUNIT_IPC */
> +
> +#endif
> diff --git a/drivers/platform/x86/Kconfig
> b/drivers/platform/x86/Kconfig
> index 1089eaa..148ff88 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -944,4 +944,10 @@ config SURFACE_PRO3_BUTTON
> depends on ACPI && INPUT
> ---help---
> This driver handles the power/home/volume buttons on the
> Microsoft Surface Pro 3 tablet.
> +
> +config INTEL_PUNIT_IPC
> + tristate "Intel P-Unit IPC Driver"
> + ---help---
> + This driver provides support for Intel P-Unit Mailbox IPC
> mechanism,
> + which is used to bridge the communications between kernel
> and P-Unit.
> endif # X86_PLATFORM_DEVICES
> diff --git a/drivers/platform/x86/Makefile
> b/drivers/platform/x86/Makefile
> index 3ca78a3..5ee5425 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -62,3 +62,4 @@ obj-$(CONFIG_PVPANIC) += pvpanic.o
> obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
> obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
> obj-$(CONFIG_SURFACE_PRO3_BUTTON) += surfacepro3_button.o
> +obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
> diff --git a/drivers/platform/x86/intel_punit_ipc.c
> b/drivers/platform/x86/intel_punit_ipc.c
> new file mode 100644
> index 0000000..e6354a7
> --- /dev/null
> +++ b/drivers/platform/x86/intel_punit_ipc.c
> @@ -0,0 +1,336 @@
> +/*
> + * Driver for the Intel P-Unit Mailbox IPC mechanism
> + *
> + * (C) Copyright 2015 Intel Corporation
> + *
> + * This program is free software; you can redistribute it and/or
> modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * The heart of the P-Unit is the Foxton microcontroller and its
> firmware,
> + * which provide mailbox interface for power management usage.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/acpi.h>
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/interrupt.h>
> +#include <linux/platform_device.h>
> +#include <asm/intel_punit_ipc.h>
> +
> +/* IPC Mailbox registers */
> +#define OFFSET_DATA_LOW 0x0
> +#define OFFSET_DATA_HIGH 0x4
> +/* bit field of interface register */
> +#define CMD_RUN (1 << 31)
> +#define CMD_ERRCODE_MASK 0xFF
#include <linux/bitops.h>
…BIT(31)
…GENMASK(7,0)
> +#define CMD_PARA1_SHIFT 8
> +#define CMD_PARA2_SHIFT 16
> +
> +#define CMD_TIMEOUT_SECONDS 1
> +
> +enum {
> + DATA = 0,
> + INTERFACE,
BASE_DATA
BASE_IFACE (or BASE_INTERFACE if you prefer, though better to be in
align across those two drivers)
BASE_MAX
> +};
> +
> +typedef struct {
> + struct device *dev;
> + struct mutex lock;
> + int irq;
> + struct completion cmd_complete;
> + /* base of interface and data registers */
> + void __iomem *base[RESERVED_IPC][INTERFACE + 1];
…[][BASE_MAX];
> + IPC_TYPE type;
> +} IPC_DEV;
> +
> +static IPC_DEV *punit_ipcdev;
> +
> +static inline u32 ipc_read_status(IPC_DEV *ipcdev, IPC_TYPE type)
> +{
> + return readl(ipcdev->base[type][INTERFACE]);
> +}
> +
> +static inline void ipc_write_cmd(IPC_DEV *ipcdev, IPC_TYPE type, u32
> cmd)
> +{
> + writel(cmd, ipcdev->base[type][INTERFACE]);
> +}
> +
> +static inline u32 ipc_read_data_low(IPC_DEV *ipcdev, IPC_TYPE type)
> +{
> + return readl(ipcdev->base[type][DATA] + OFFSET_DATA_LOW);
> +}
> +
> +static inline u32 ipc_read_data_high(IPC_DEV *ipcdev, IPC_TYPE type)
> +{
> + return readl(ipcdev->base[type][DATA] + OFFSET_DATA_HIGH);
> +}
> +
> +static inline void ipc_write_data_low(IPC_DEV *ipcdev, IPC_TYPE
> type, u32 data)
> +{
> + writel(data, ipcdev->base[type][DATA] + OFFSET_DATA_LOW);
> +}
> +
> +static inline void ipc_write_data_high(IPC_DEV *ipcdev, IPC_TYPE
> type, u32 data)
> +{
> + writel(data, ipcdev->base[type][DATA] + OFFSET_DATA_HIGH);
> +}
> +
> +static const char *ipc_err_string(int error)
> +{
> + if (error == IPC_PUNIT_ERR_SUCCESS)
> + return "no error";
> + else if (error == IPC_PUNIT_ERR_INVALID_CMD)
> + return "invalid command";
> + else if (error == IPC_PUNIT_ERR_INVALID_PARAMETER)
> + return "invalid parameter";
> + else if (error == IPC_PUNIT_ERR_CMD_TIMEOUT)
> + return "command timeout";
> + else if (error == IPC_PUNIT_ERR_CMD_LOCKED)
> + return "command locked";
> + else if (error == IPC_PUNIT_ERR_INVALID_VR_ID)
> + return "invalid vr id";
> + else if (error == IPC_PUNIT_ERR_VR_ERR)
> + return "vr error";
> + else
> + return "unknown error";
> +}
> +
> +static int intel_punit_ipc_check_status(IPC_DEV *ipcdev, IPC_TYPE
> type)
> +{
> + int loops = CMD_TIMEOUT_SECONDS * USEC_PER_SEC;
> + int errcode;
> + int status;
> +
> + if (ipcdev->irq) {
> + if (!wait_for_completion_timeout(&ipcdev-
> >cmd_complete,
> + CMD_TIMEOUT_SECONDS
> * HZ)) {
> + dev_err(ipcdev->dev, "IPC timed out\n");
> + return -ETIMEDOUT;
> + }
> + } else {
> + while ((ipc_read_status(ipcdev, type) & CMD_RUN) &&
> --loops)
> + udelay(1);
> + if (!loops) {
> + dev_err(ipcdev->dev, "IPC timed out\n");
> + return -ETIMEDOUT;
> + }
> + }
> +
> + status = ipc_read_status(ipcdev, type);
> + errcode = status & CMD_ERRCODE_MASK;
> + if (errcode) {
> + dev_err(ipcdev->dev, "IPC failed: %s,
> IPC_STS=0x%x\n",
> + ipc_err_string(errcode), status);
> + return -EIO;
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * intel_punit_ipc_simple_command() - Simple IPC command
> + * @cmd: IPC command code.
> + * @para1: First 8bit parameter, set 0 if not used.
> + * @para2: Second 8bit parameter, set 0 if not used.
> + *
> + * Send a IPC command to P-Unit when there is no data transaction
> + *
> + * Return: IPC error code or 0 on success.
> + */
> +int intel_punit_ipc_simple_command(int cmd, int para1, int para2)
> +{
> + IPC_DEV *ipcdev = punit_ipcdev;
> + IPC_TYPE type;
> + u32 val;
> + int ret;
> +
> + mutex_lock(&ipcdev->lock);
> +
> + reinit_completion(&ipcdev->cmd_complete);
> + type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
> +
> + val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
> + val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 <<
> CMD_PARA1_SHIFT;
> + ipc_write_cmd(ipcdev, type, val);
> + ret = intel_punit_ipc_check_status(ipcdev, type);
> +
> + mutex_unlock(&ipcdev->lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(intel_punit_ipc_simple_command);
> +
> +/**
> + * intel_punit_ipc_command() - IPC command with data and pointers
> + * @cmd: IPC command code.
> + * @para1: First 8bit parameter, set 0 if not used.
> + * @para2: Second 8bit parameter, set 0 if not used.
> + * @in: Input data, 32bit for BIOS cmd, two 32bit for
> GTD and ISPD.
> + * @out: Output data.
> + *
> + * Send a IPC command to P-Unit with data transaction
> + *
> + * Return: IPC error code or 0 on success.
> + */
> +int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in,
> u32 *out)
> +{
> + IPC_DEV *ipcdev = punit_ipcdev;
> + IPC_TYPE type;
> + u32 val;
> + int ret;
> +
> + mutex_lock(&ipcdev->lock);
> +
> + reinit_completion(&ipcdev->cmd_complete);
> + type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
> + ipc_write_data_low(ipcdev, type, *in);
> +
> + if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
> + ipc_write_data_high(ipcdev, type, *++in);
> +
> + val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
> + val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 <<
> CMD_PARA1_SHIFT;
> + ipc_write_cmd(ipcdev, type, val);
> +
> + ret = intel_punit_ipc_check_status(ipcdev, type);
> + if (ret)
> + goto out;
> + *out = ipc_read_data_low(ipcdev, type);
> +
> + if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
> + *++out = ipc_read_data_high(ipcdev, type);
> +
> +out:
> + mutex_unlock(&ipcdev->lock);
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(intel_punit_ipc_command);
> +
> +static irqreturn_t intel_punit_ioc(int irq, void *dev_id)
> +{
> + IPC_DEV *ipcdev = dev_id;
> +
> + complete(&ipcdev->cmd_complete);
> + return IRQ_HANDLED;
> +}
> +
> +static int intel_punit_get_bars(struct platform_device *pdev)
> +{
> + struct resource *res;
> + void __iomem *addr;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + addr = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(addr))
> + return PTR_ERR(addr);
> + punit_ipcdev->base[BIOS_IPC][DATA] = addr;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> + addr = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(addr))
> + return PTR_ERR(addr);
> + punit_ipcdev->base[BIOS_IPC][INTERFACE] = addr;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
> + addr = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(addr))
> + return PTR_ERR(addr);
> + punit_ipcdev->base[ISPDRIVER_IPC][DATA] = addr;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
> + addr = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(addr))
> + return PTR_ERR(addr);
> + punit_ipcdev->base[ISPDRIVER_IPC][INTERFACE] = addr;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
> + addr = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(addr))
> + return PTR_ERR(addr);
> + punit_ipcdev->base[GTDRIVER_IPC][DATA] = addr;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
> + addr = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(addr))
> + return PTR_ERR(addr);
> + punit_ipcdev->base[GTDRIVER_IPC][INTERFACE] = addr;
> +
> + return 0;
> +}
> +
> +static int intel_punit_ipc_probe(struct platform_device *pdev)
> +{
> + int irq, ret;
> +
> + punit_ipcdev = devm_kzalloc(&pdev->dev,
> + sizeof(*punit_ipcdev),
> GFP_KERNEL);
> + if (!punit_ipcdev)
> + return -ENOMEM;
> +
> + platform_set_drvdata(pdev, punit_ipcdev);
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0) {
> + punit_ipcdev->irq = 0;
> + dev_warn(&pdev->dev, "Invalid IRQ, using polling
> mode\n");
> + } else {
> + ret = devm_request_irq(&pdev->dev, irq,
> intel_punit_ioc,
> + IRQF_NO_SUSPEND,
> "intel_punit_ipc",
> + &punit_ipcdev);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to request irq:
> %d\n", irq);
> + return ret;
> + }
> + punit_ipcdev->irq = irq;
> + }
> +
> + ret = intel_punit_get_bars(pdev);
> + if (ret)
> + goto out;
> +
> + punit_ipcdev->dev = &pdev->dev;
> + mutex_init(&punit_ipcdev->lock);
> + init_completion(&punit_ipcdev->cmd_complete);
> +
> +out:
> + return ret;
> +}
> +
> +static int intel_punit_ipc_remove(struct platform_device *pdev)
> +{
> + return 0;
> +}
> +
> +static const struct acpi_device_id punit_ipc_acpi_ids[] = {
> + { "INT34D4", 0 },
> + { }
> +};
> +
> +static struct platform_driver intel_punit_ipc_driver = {
> + .probe = intel_punit_ipc_probe,
> + .remove = intel_punit_ipc_remove,
> + .driver = {
> + .name = "intel_punit_ipc",
> + .acpi_match_table = ACPI_PTR(punit_ipc_acpi_ids),
> + },
> +};
> +
> +static int __init intel_punit_ipc_init(void)
> +{
> + return platform_driver_register(&intel_punit_ipc_driver);
> +}
> +
> +static void __exit intel_punit_ipc_exit(void)
> +{
> + platform_driver_unregister(&intel_punit_ipc_driver);
> +}
> +
> +MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>");
> +MODULE_DESCRIPTION("Intel P-Unit IPC driver");
> +MODULE_LICENSE("GPL v2");
> +
> +/* Some modules are dependent on this, so init earlier */
> +fs_initcall(intel_punit_ipc_init);
Here still the question, but let's resolve this later.
> +module_exit(intel_punit_ipc_exit);
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH V9 1/2] intel_pmc_ipc: update acpi resource structure for Punit
@ 2015-12-10 18:21 Qipeng Zha
2015-12-10 11:13 ` Andy Shevchenko
2015-12-10 18:21 ` [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver Qipeng Zha
0 siblings, 2 replies; 7+ messages in thread
From: Qipeng Zha @ 2015-12-10 18:21 UTC (permalink / raw)
To: platform-driver-x86; +Cc: dvhart, andriy.shevchenko
BIOS restructure exported memory resources for Punit
in acpi table, So update resources for Punit.
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
---
change in v9
rename indexes of all acpi resources;
add comments for punit_res;
---
drivers/platform/x86/intel_pmc_ipc.c | 114 ++++++++++++++++++++++++-----------
1 file changed, 80 insertions(+), 34 deletions(-)
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
index 28b2a12..00812a4 100644
--- a/drivers/platform/x86/intel_pmc_ipc.c
+++ b/drivers/platform/x86/intel_pmc_ipc.c
@@ -68,8 +68,12 @@
#define PLAT_RESOURCE_IPC_INDEX 0
#define PLAT_RESOURCE_IPC_SIZE 0x1000
#define PLAT_RESOURCE_GCR_SIZE 0x1000
-#define PLAT_RESOURCE_PUNIT_DATA_INDEX 1
-#define PLAT_RESOURCE_PUNIT_INTER_INDEX 2
+#define PLAT_RESOURCE_BIOS_DATA_INDEX 1
+#define PLAT_RESOURCE_BIOS_INTER_INDEX 2
+#define PLAT_RESOURCE_ISP_DATA_INDEX 4
+#define PLAT_RESOURCE_ISP_INTER_INDEX 5
+#define PLAT_RESOURCE_GTD_DATA_INDEX 6
+#define PLAT_RESOURCE_GTD_INTER_INDEX 7
#define PLAT_RESOURCE_ACPI_IO_INDEX 0
/*
@@ -105,10 +109,6 @@ static struct intel_pmc_ipc_dev {
int gcr_size;
/* punit */
- resource_size_t punit_base;
- int punit_size;
- resource_size_t punit_base2;
- int punit_size2;
struct platform_device *punit_dev;
} ipcdev;
@@ -444,9 +444,22 @@ static const struct attribute_group intel_ipc_group = {
.attrs = intel_ipc_attrs,
};
-#define PUNIT_RESOURCE_INTER 1
-static struct resource punit_res[] = {
- /* Punit */
+static struct resource punit_res_array[] = {
+ /* Punit BIOS */
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ /* Punit ISP */
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ /* Punit GTD */
{
.flags = IORESOURCE_MEM,
},
@@ -481,7 +494,6 @@ static struct itco_wdt_platform_data tco_info = {
static int ipc_create_punit_device(void)
{
struct platform_device *pdev;
- struct resource *res;
int ret;
pdev = platform_device_alloc(PUNIT_DEVICE_NAME, -1);
@@ -491,17 +503,8 @@ static int ipc_create_punit_device(void)
}
pdev->dev.parent = ipcdev.dev;
-
- res = punit_res;
- res->start = ipcdev.punit_base;
- res->end = res->start + ipcdev.punit_size - 1;
-
- res = punit_res + PUNIT_RESOURCE_INTER;
- res->start = ipcdev.punit_base2;
- res->end = res->start + ipcdev.punit_size2 - 1;
-
- ret = platform_device_add_resources(pdev, punit_res,
- ARRAY_SIZE(punit_res));
+ ret = platform_device_add_resources(pdev, punit_res_array,
+ ARRAY_SIZE(punit_res_array));
if (ret) {
dev_err(ipcdev.dev, "Failed to add platform punit resources\n");
goto err;
@@ -590,7 +593,7 @@ static int ipc_create_pmc_devices(void)
static int ipc_plat_get_res(struct platform_device *pdev)
{
- struct resource *res;
+ struct resource *res, *punit_res;
void __iomem *addr;
int size;
@@ -606,28 +609,71 @@ static int ipc_plat_get_res(struct platform_device *pdev)
dev_info(&pdev->dev, "io res: %llx %x\n",
(long long)res->start, (int)resource_size(res));
+ /* This is index 0 to cover BIOS data register */
+ punit_res = punit_res_array;
res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_PUNIT_DATA_INDEX);
+ PLAT_RESOURCE_BIOS_DATA_INDEX);
if (!res) {
- dev_err(&pdev->dev, "Failed to get punit resource\n");
+ dev_err(&pdev->dev, "Failed to get res of punit BIOS data\n");
return -ENXIO;
}
- size = resource_size(res);
- ipcdev.punit_base = res->start;
- ipcdev.punit_size = size;
- dev_info(&pdev->dev, "punit data res: %llx %x\n",
+ *punit_res = *res;
+ dev_info(&pdev->dev, "punit BIOS data res: %llx %x\n",
(long long)res->start, (int)resource_size(res));
res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_PUNIT_INTER_INDEX);
+ PLAT_RESOURCE_BIOS_INTER_INDEX);
if (!res) {
- dev_err(&pdev->dev, "Failed to get punit inter resource\n");
+ dev_err(&pdev->dev, "Failed to get res of punit BIOS inter\n");
return -ENXIO;
}
- size = resource_size(res);
- ipcdev.punit_base2 = res->start;
- ipcdev.punit_size2 = size;
- dev_info(&pdev->dev, "punit interface res: %llx %x\n",
+ /* This is index 1 to cover BIOS interface register */
+ *++punit_res = *res;
+ dev_info(&pdev->dev, "punit BIOS interface res: %llx %x\n",
+ (long long)res->start, (int)resource_size(res));
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM,
+ PLAT_RESOURCE_ISP_DATA_INDEX);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get res of punit ISP data\n");
+ return -ENXIO;
+ }
+ /* This is index 2 to cover ISP data register */
+ *++punit_res = *res;
+ dev_info(&pdev->dev, "punit ISP data res: %llx %x\n",
+ (long long)res->start, (int)resource_size(res));
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM,
+ PLAT_RESOURCE_ISP_INTER_INDEX);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get res of punit ISP inter\n");
+ return -ENXIO;
+ }
+ /* This is index 3 to cover ISP interface register */
+ *++punit_res = *res;
+ dev_info(&pdev->dev, "punit ISP interface res: %llx %x\n",
+ (long long)res->start, (int)resource_size(res));
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM,
+ PLAT_RESOURCE_GTD_DATA_INDEX);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get res of punit GTD data\n");
+ return -ENXIO;
+ }
+ /* This is index 4 to cover GTD data register */
+ *++punit_res = *res;
+ dev_info(&pdev->dev, "punit GTD data res: %llx %x\n",
+ (long long)res->start, (int)resource_size(res));
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM,
+ PLAT_RESOURCE_GTD_INTER_INDEX);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get res of punit GTD inter\n");
+ return -ENXIO;
+ }
+ /* This is index 5 to cover GTD interface register */
+ *++punit_res = *res;
+ dev_info(&pdev->dev, "punit GTD interface res: %llx %x\n",
(long long)res->start, (int)resource_size(res));
res = platform_get_resource(pdev, IORESOURCE_MEM,
--
1.8.3.2
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver
2015-12-10 18:21 [PATCH V9 1/2] intel_pmc_ipc: update acpi resource structure for Punit Qipeng Zha
2015-12-10 11:13 ` Andy Shevchenko
@ 2015-12-10 18:21 ` Qipeng Zha
2015-12-10 11:23 ` Andy Shevchenko
1 sibling, 1 reply; 7+ messages in thread
From: Qipeng Zha @ 2015-12-10 18:21 UTC (permalink / raw)
To: platform-driver-x86; +Cc: dvhart, andriy.shevchenko
This driver provides support for P-Unit mailbox IPC on Intel platforms.
The heart of the P-Unit is the Foxton microcontroller and its firmware,
which provide mailbox interface for power management usage.
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
---
change in v9
remove non-necessary cast for void pointer;
remove redundant error messages.
change in v8
Change the way to get three IPCs's resources due to udpated acpi entries,
In the new acpi resources layout, two entries for each IPC, one for data
and one for interface.
change in v7
Update ipc_err_string()'s return type to "const char *" from "char *";
Add terminator in acpi id array.
change in v6
Update header file;
Update interface of lowlevel register access;
Restructure implementation of two command functions;
Save IPC private data pointer to pdev's priv;
change in v5
Fix commend style in header file;
Replace EINVAL with ENODEV in stub functions;
Replace ipc_err_sources array with ipc_err_string function;
Correct comments: "if invalid" -> "if not used";
Propagate return error of devm_request_irq.
change in v4
Fix two code style issues: make /* as a whole line and replace
"return ret" with "goto out";
Replace -EINVAL with -ENXIO for failures due to resource.
change in v3
Fix compile issue in intel_punit_ipc.h, it happened when built-in
and the header file is included in other source file.
change in v2
Fix issues in code style and comments;
Remove "default y" in Kconfig;
Remove some header files;
Replace request_mem_region with devm_request_mem_region,
and same for request_irq;
Change to use prefix of IPC_PUNIT_ to define commands.
---
MAINTAINERS | 4 +-
arch/x86/include/asm/intel_punit_ipc.h | 101 ++++++++++
drivers/platform/x86/Kconfig | 6 +
drivers/platform/x86/Makefile | 1 +
drivers/platform/x86/intel_punit_ipc.c | 336 +++++++++++++++++++++++++++++++++
5 files changed, 447 insertions(+), 1 deletion(-)
create mode 100644 arch/x86/include/asm/intel_punit_ipc.h
create mode 100644 drivers/platform/x86/intel_punit_ipc.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 5192700..333a022 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5683,12 +5683,14 @@ F: drivers/dma/mic_x100_dma.c
F: drivers/dma/mic_x100_dma.h
F Documentation/mic/
-INTEL PMC IPC DRIVER
+INTEL PMC/P-Unit IPC DRIVER
M: Zha Qipeng<qipeng.zha@intel.com>
L: platform-driver-x86@vger.kernel.org
S: Maintained
F: drivers/platform/x86/intel_pmc_ipc.c
+F: drivers/platform/x86/intel_punit_ipc.c
F: arch/x86/include/asm/intel_pmc_ipc.h
+F: arch/x86/include/asm/intel_punit_ipc.h
IOC3 ETHERNET DRIVER
M: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/x86/include/asm/intel_punit_ipc.h b/arch/x86/include/asm/intel_punit_ipc.h
new file mode 100644
index 0000000..201eb9d
--- /dev/null
+++ b/arch/x86/include/asm/intel_punit_ipc.h
@@ -0,0 +1,101 @@
+#ifndef _ASM_X86_INTEL_PUNIT_IPC_H_
+#define _ASM_X86_INTEL_PUNIT_IPC_H_
+
+/*
+ * Three types of 8bit P-Unit IPC commands are supported,
+ * bit[7:6]: [00]: BIOS; [01]: GTD; [10]: ISPD.
+ */
+typedef enum {
+ BIOS_IPC = 0,
+ GTDRIVER_IPC,
+ ISPDRIVER_IPC,
+ RESERVED_IPC,
+} IPC_TYPE;
+
+#define IPC_TYPE_OFFSET 6
+#define IPC_PUNIT_BIOS_CMD_BASE (BIOS_IPC << IPC_TYPE_OFFSET)
+#define IPC_PUNIT_GTD_CMD_BASE (GTDDRIVER_IPC << IPC_TYPE_OFFSET)
+#define IPC_PUNIT_ISPD_CMD_BASE (ISPDRIVER_IPC << IPC_TYPE_OFFSET)
+#define IPC_PUNIT_CMD_TYPE_MASK (RESERVED_IPC << IPC_TYPE_OFFSET)
+
+/* BIOS => Pcode commands */
+#define IPC_PUNIT_BIOS_ZERO (IPC_PUNIT_BIOS_CMD_BASE | 0x00)
+#define IPC_PUNIT_BIOS_VR_INTERFACE (IPC_PUNIT_BIOS_CMD_BASE | 0x01)
+#define IPC_PUNIT_BIOS_READ_PCS (IPC_PUNIT_BIOS_CMD_BASE | 0x02)
+#define IPC_PUNIT_BIOS_WRITE_PCS (IPC_PUNIT_BIOS_CMD_BASE | 0x03)
+#define IPC_PUNIT_BIOS_READ_PCU_CONFIG (IPC_PUNIT_BIOS_CMD_BASE | 0x04)
+#define IPC_PUNIT_BIOS_WRITE_PCU_CONFIG (IPC_PUNIT_BIOS_CMD_BASE | 0x05)
+#define IPC_PUNIT_BIOS_READ_PL1_SETTING (IPC_PUNIT_BIOS_CMD_BASE | 0x06)
+#define IPC_PUNIT_BIOS_WRITE_PL1_SETTING (IPC_PUNIT_BIOS_CMD_BASE | 0x07)
+#define IPC_PUNIT_BIOS_TRIGGER_VDD_RAM (IPC_PUNIT_BIOS_CMD_BASE | 0x08)
+#define IPC_PUNIT_BIOS_READ_TELE_INFO (IPC_PUNIT_BIOS_CMD_BASE | 0x09)
+#define IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_CMD_BASE | 0x0a)
+#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_CMD_BASE | 0x0b)
+#define IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_CMD_BASE | 0x0c)
+#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_CMD_BASE | 0x0d)
+#define IPC_PUNIT_BIOS_READ_TELE_TRACE (IPC_PUNIT_BIOS_CMD_BASE | 0x0e)
+#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE (IPC_PUNIT_BIOS_CMD_BASE | 0x0f)
+#define IPC_PUNIT_BIOS_READ_TELE_EVENT (IPC_PUNIT_BIOS_CMD_BASE | 0x10)
+#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT (IPC_PUNIT_BIOS_CMD_BASE | 0x11)
+#define IPC_PUNIT_BIOS_READ_MODULE_TEMP (IPC_PUNIT_BIOS_CMD_BASE | 0x12)
+#define IPC_PUNIT_BIOS_RESERVED (IPC_PUNIT_BIOS_CMD_BASE | 0x13)
+#define IPC_PUNIT_BIOS_READ_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD_BASE | 0x14)
+#define IPC_PUNIT_BIOS_WRITE_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD_BASE | 0x15)
+#define IPC_PUNIT_BIOS_READ_RATIO_OVER (IPC_PUNIT_BIOS_CMD_BASE | 0x16)
+#define IPC_PUNIT_BIOS_WRITE_RATIO_OVER (IPC_PUNIT_BIOS_CMD_BASE | 0x17)
+#define IPC_PUNIT_BIOS_READ_VF_GL_CTRL (IPC_PUNIT_BIOS_CMD_BASE | 0x18)
+#define IPC_PUNIT_BIOS_WRITE_VF_GL_CTRL (IPC_PUNIT_BIOS_CMD_BASE | 0x19)
+#define IPC_PUNIT_BIOS_READ_FM_SOC_TEMP_THRESH (IPC_PUNIT_BIOS_CMD_BASE | 0x1a)
+#define IPC_PUNIT_BIOS_WRITE_FM_SOC_TEMP_THRESH (IPC_PUNIT_BIOS_CMD_BASE | 0x1b)
+
+/* GT Driver => Pcode commands */
+#define IPC_PUNIT_GTD_ZERO (IPC_PUNIT_GTD_CMD_BASE | 0x00)
+#define IPC_PUNIT_GTD_CONFIG (IPC_PUNIT_GTD_CMD_BASE | 0x01)
+#define IPC_PUNIT_GTD_READ_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD_CMD_BASE | 0x02)
+#define IPC_PUNIT_GTD_WRITE_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD_CMD_BASE | 0x03)
+#define IPC_PUNIT_GTD_GET_WM_VAL (IPC_PUNIT_GTD_CMD_BASE | 0x06)
+#define IPC_PUNIT_GTD_WRITE_CONFIG_WISHREQ (IPC_PUNIT_GTD_CMD_BASE | 0x07)
+#define IPC_PUNIT_GTD_READ_REQ_DUTY_CYCLE (IPC_PUNIT_GTD_CMD_BASE | 0x16)
+#define IPC_PUNIT_GTD_DIS_VOL_FREQ_CHG_REQUEST (IPC_PUNIT_GTD_CMD_BASE | 0x17)
+#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_CTRL (IPC_PUNIT_GTD_CMD_BASE | 0x1a)
+#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_TUNING (IPC_PUNIT_GTD_CMD_BASE | 0x1c)
+
+/* ISP Driver => Pcode commands */
+#define IPC_PUNIT_ISPD_ZERO (IPC_PUNIT_ISPD_CMD_BASE | 0x00)
+#define IPC_PUNIT_ISPD_CONFIG (IPC_PUNIT_ISPD_CMD_BASE | 0x01)
+#define IPC_PUNIT_ISPD_GET_ISP_LTR_VAL (IPC_PUNIT_ISPD_CMD_BASE | 0x02)
+#define IPC_PUNIT_ISPD_ACCESS_IU_FREQ_BOUNDS (IPC_PUNIT_ISPD_CMD_BASE | 0x03)
+#define IPC_PUNIT_ISPD_READ_CDYN_LEVEL (IPC_PUNIT_ISPD_CMD_BASE | 0x04)
+#define IPC_PUNIT_ISPD_WRITE_CDYN_LEVEL (IPC_PUNIT_ISPD_CMD_BASE | 0x05)
+
+/* Error codes */
+#define IPC_PUNIT_ERR_SUCCESS 0
+#define IPC_PUNIT_ERR_INVALID_CMD 1
+#define IPC_PUNIT_ERR_INVALID_PARAMETER 2
+#define IPC_PUNIT_ERR_CMD_TIMEOUT 3
+#define IPC_PUNIT_ERR_CMD_LOCKED 4
+#define IPC_PUNIT_ERR_INVALID_VR_ID 5
+#define IPC_PUNIT_ERR_VR_ERR 6
+
+#if IS_ENABLED(CONFIG_INTEL_PUNIT_IPC)
+
+int intel_punit_ipc_simple_command(int cmd, int para1, int para2);
+int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out);
+
+#else
+
+static inline int intel_punit_ipc_simple_command(int cmd,
+ int para1, int para2)
+{
+ return -ENODEV;
+}
+
+static inline int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2,
+ u32 *in, u32 *out)
+{
+ return -ENODEV;
+}
+
+#endif /* CONFIG_INTEL_PUNIT_IPC */
+
+#endif
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 1089eaa..148ff88 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -944,4 +944,10 @@ config SURFACE_PRO3_BUTTON
depends on ACPI && INPUT
---help---
This driver handles the power/home/volume buttons on the Microsoft Surface Pro 3 tablet.
+
+config INTEL_PUNIT_IPC
+ tristate "Intel P-Unit IPC Driver"
+ ---help---
+ This driver provides support for Intel P-Unit Mailbox IPC mechanism,
+ which is used to bridge the communications between kernel and P-Unit.
endif # X86_PLATFORM_DEVICES
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 3ca78a3..5ee5425 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -62,3 +62,4 @@ obj-$(CONFIG_PVPANIC) += pvpanic.o
obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
obj-$(CONFIG_SURFACE_PRO3_BUTTON) += surfacepro3_button.o
+obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
diff --git a/drivers/platform/x86/intel_punit_ipc.c b/drivers/platform/x86/intel_punit_ipc.c
new file mode 100644
index 0000000..e6354a7
--- /dev/null
+++ b/drivers/platform/x86/intel_punit_ipc.c
@@ -0,0 +1,336 @@
+/*
+ * Driver for the Intel P-Unit Mailbox IPC mechanism
+ *
+ * (C) Copyright 2015 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The heart of the P-Unit is the Foxton microcontroller and its firmware,
+ * which provide mailbox interface for power management usage.
+ */
+
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <asm/intel_punit_ipc.h>
+
+/* IPC Mailbox registers */
+#define OFFSET_DATA_LOW 0x0
+#define OFFSET_DATA_HIGH 0x4
+/* bit field of interface register */
+#define CMD_RUN (1 << 31)
+#define CMD_ERRCODE_MASK 0xFF
+#define CMD_PARA1_SHIFT 8
+#define CMD_PARA2_SHIFT 16
+
+#define CMD_TIMEOUT_SECONDS 1
+
+enum {
+ DATA = 0,
+ INTERFACE,
+};
+
+typedef struct {
+ struct device *dev;
+ struct mutex lock;
+ int irq;
+ struct completion cmd_complete;
+ /* base of interface and data registers */
+ void __iomem *base[RESERVED_IPC][INTERFACE + 1];
+ IPC_TYPE type;
+} IPC_DEV;
+
+static IPC_DEV *punit_ipcdev;
+
+static inline u32 ipc_read_status(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ return readl(ipcdev->base[type][INTERFACE]);
+}
+
+static inline void ipc_write_cmd(IPC_DEV *ipcdev, IPC_TYPE type, u32 cmd)
+{
+ writel(cmd, ipcdev->base[type][INTERFACE]);
+}
+
+static inline u32 ipc_read_data_low(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ return readl(ipcdev->base[type][DATA] + OFFSET_DATA_LOW);
+}
+
+static inline u32 ipc_read_data_high(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ return readl(ipcdev->base[type][DATA] + OFFSET_DATA_HIGH);
+}
+
+static inline void ipc_write_data_low(IPC_DEV *ipcdev, IPC_TYPE type, u32 data)
+{
+ writel(data, ipcdev->base[type][DATA] + OFFSET_DATA_LOW);
+}
+
+static inline void ipc_write_data_high(IPC_DEV *ipcdev, IPC_TYPE type, u32 data)
+{
+ writel(data, ipcdev->base[type][DATA] + OFFSET_DATA_HIGH);
+}
+
+static const char *ipc_err_string(int error)
+{
+ if (error == IPC_PUNIT_ERR_SUCCESS)
+ return "no error";
+ else if (error == IPC_PUNIT_ERR_INVALID_CMD)
+ return "invalid command";
+ else if (error == IPC_PUNIT_ERR_INVALID_PARAMETER)
+ return "invalid parameter";
+ else if (error == IPC_PUNIT_ERR_CMD_TIMEOUT)
+ return "command timeout";
+ else if (error == IPC_PUNIT_ERR_CMD_LOCKED)
+ return "command locked";
+ else if (error == IPC_PUNIT_ERR_INVALID_VR_ID)
+ return "invalid vr id";
+ else if (error == IPC_PUNIT_ERR_VR_ERR)
+ return "vr error";
+ else
+ return "unknown error";
+}
+
+static int intel_punit_ipc_check_status(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ int loops = CMD_TIMEOUT_SECONDS * USEC_PER_SEC;
+ int errcode;
+ int status;
+
+ if (ipcdev->irq) {
+ if (!wait_for_completion_timeout(&ipcdev->cmd_complete,
+ CMD_TIMEOUT_SECONDS * HZ)) {
+ dev_err(ipcdev->dev, "IPC timed out\n");
+ return -ETIMEDOUT;
+ }
+ } else {
+ while ((ipc_read_status(ipcdev, type) & CMD_RUN) && --loops)
+ udelay(1);
+ if (!loops) {
+ dev_err(ipcdev->dev, "IPC timed out\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ status = ipc_read_status(ipcdev, type);
+ errcode = status & CMD_ERRCODE_MASK;
+ if (errcode) {
+ dev_err(ipcdev->dev, "IPC failed: %s, IPC_STS=0x%x\n",
+ ipc_err_string(errcode), status);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * intel_punit_ipc_simple_command() - Simple IPC command
+ * @cmd: IPC command code.
+ * @para1: First 8bit parameter, set 0 if not used.
+ * @para2: Second 8bit parameter, set 0 if not used.
+ *
+ * Send a IPC command to P-Unit when there is no data transaction
+ *
+ * Return: IPC error code or 0 on success.
+ */
+int intel_punit_ipc_simple_command(int cmd, int para1, int para2)
+{
+ IPC_DEV *ipcdev = punit_ipcdev;
+ IPC_TYPE type;
+ u32 val;
+ int ret;
+
+ mutex_lock(&ipcdev->lock);
+
+ reinit_completion(&ipcdev->cmd_complete);
+ type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
+
+ val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
+ val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT;
+ ipc_write_cmd(ipcdev, type, val);
+ ret = intel_punit_ipc_check_status(ipcdev, type);
+
+ mutex_unlock(&ipcdev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(intel_punit_ipc_simple_command);
+
+/**
+ * intel_punit_ipc_command() - IPC command with data and pointers
+ * @cmd: IPC command code.
+ * @para1: First 8bit parameter, set 0 if not used.
+ * @para2: Second 8bit parameter, set 0 if not used.
+ * @in: Input data, 32bit for BIOS cmd, two 32bit for GTD and ISPD.
+ * @out: Output data.
+ *
+ * Send a IPC command to P-Unit with data transaction
+ *
+ * Return: IPC error code or 0 on success.
+ */
+int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out)
+{
+ IPC_DEV *ipcdev = punit_ipcdev;
+ IPC_TYPE type;
+ u32 val;
+ int ret;
+
+ mutex_lock(&ipcdev->lock);
+
+ reinit_completion(&ipcdev->cmd_complete);
+ type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
+ ipc_write_data_low(ipcdev, type, *in);
+
+ if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
+ ipc_write_data_high(ipcdev, type, *++in);
+
+ val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
+ val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT;
+ ipc_write_cmd(ipcdev, type, val);
+
+ ret = intel_punit_ipc_check_status(ipcdev, type);
+ if (ret)
+ goto out;
+ *out = ipc_read_data_low(ipcdev, type);
+
+ if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
+ *++out = ipc_read_data_high(ipcdev, type);
+
+out:
+ mutex_unlock(&ipcdev->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(intel_punit_ipc_command);
+
+static irqreturn_t intel_punit_ioc(int irq, void *dev_id)
+{
+ IPC_DEV *ipcdev = dev_id;
+
+ complete(&ipcdev->cmd_complete);
+ return IRQ_HANDLED;
+}
+
+static int intel_punit_get_bars(struct platform_device *pdev)
+{
+ struct resource *res;
+ void __iomem *addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[BIOS_IPC][DATA] = addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[BIOS_IPC][INTERFACE] = addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[ISPDRIVER_IPC][DATA] = addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[ISPDRIVER_IPC][INTERFACE] = addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[GTDRIVER_IPC][DATA] = addr;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[GTDRIVER_IPC][INTERFACE] = addr;
+
+ return 0;
+}
+
+static int intel_punit_ipc_probe(struct platform_device *pdev)
+{
+ int irq, ret;
+
+ punit_ipcdev = devm_kzalloc(&pdev->dev,
+ sizeof(*punit_ipcdev), GFP_KERNEL);
+ if (!punit_ipcdev)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, punit_ipcdev);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ punit_ipcdev->irq = 0;
+ dev_warn(&pdev->dev, "Invalid IRQ, using polling mode\n");
+ } else {
+ ret = devm_request_irq(&pdev->dev, irq, intel_punit_ioc,
+ IRQF_NO_SUSPEND, "intel_punit_ipc",
+ &punit_ipcdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request irq: %d\n", irq);
+ return ret;
+ }
+ punit_ipcdev->irq = irq;
+ }
+
+ ret = intel_punit_get_bars(pdev);
+ if (ret)
+ goto out;
+
+ punit_ipcdev->dev = &pdev->dev;
+ mutex_init(&punit_ipcdev->lock);
+ init_completion(&punit_ipcdev->cmd_complete);
+
+out:
+ return ret;
+}
+
+static int intel_punit_ipc_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static const struct acpi_device_id punit_ipc_acpi_ids[] = {
+ { "INT34D4", 0 },
+ { }
+};
+
+static struct platform_driver intel_punit_ipc_driver = {
+ .probe = intel_punit_ipc_probe,
+ .remove = intel_punit_ipc_remove,
+ .driver = {
+ .name = "intel_punit_ipc",
+ .acpi_match_table = ACPI_PTR(punit_ipc_acpi_ids),
+ },
+};
+
+static int __init intel_punit_ipc_init(void)
+{
+ return platform_driver_register(&intel_punit_ipc_driver);
+}
+
+static void __exit intel_punit_ipc_exit(void)
+{
+ platform_driver_unregister(&intel_punit_ipc_driver);
+}
+
+MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>");
+MODULE_DESCRIPTION("Intel P-Unit IPC driver");
+MODULE_LICENSE("GPL v2");
+
+/* Some modules are dependent on this, so init earlier */
+fs_initcall(intel_punit_ipc_init);
+module_exit(intel_punit_ipc_exit);
--
1.8.3.2
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH V9 1/2] intel_pmc_ipc: update acpi resource structure for Punit
2015-12-10 11:13 ` Andy Shevchenko
@ 2015-12-10 22:59 ` Darren Hart
0 siblings, 0 replies; 7+ messages in thread
From: Darren Hart @ 2015-12-10 22:59 UTC (permalink / raw)
To: Andy Shevchenko; +Cc: Qipeng Zha, platform-driver-x86
On Thu, Dec 10, 2015 at 01:13:01PM +0200, Andy Shevchenko wrote:
> On Fri, 2015-12-11 at 02:21 +0800, Qipeng Zha wrote:
> > BIOS restructure exported memory resources for Punit
> > in acpi table, So update resources for Punit.
> >
> > Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
> >
>
> Almost. See below.
>
> > ---
> > change in v9
> > rename indexes of all acpi resources;
> > add comments for punit_res;
> > ---
> > drivers/platform/x86/intel_pmc_ipc.c | 114 ++++++++++++++++++++++++-
> > ----------
> > 1 file changed, 80 insertions(+), 34 deletions(-)
> >
> > diff --git a/drivers/platform/x86/intel_pmc_ipc.c
> > b/drivers/platform/x86/intel_pmc_ipc.c
> > index 28b2a12..00812a4 100644
> > --- a/drivers/platform/x86/intel_pmc_ipc.c
> > +++ b/drivers/platform/x86/intel_pmc_ipc.c
> > @@ -68,8 +68,12 @@
> > #define PLAT_RESOURCE_IPC_INDEX 0
> > #define PLAT_RESOURCE_IPC_SIZE 0x1000
> > #define PLAT_RESOURCE_GCR_SIZE 0x1000
> > -#define PLAT_RESOURCE_PUNIT_DATA_INDEX 1
> > -#define PLAT_RESOURCE_PUNIT_INTER_INDEX 2
> > +#define PLAT_RESOURCE_BIOS_DATA_INDEX 1
> > +#define PLAT_RESOURCE_BIOS_INTER_INDEX 2
>
> Since there is a comment and new version will be anticipated I also
> would like to propose to change INTER to IFACE because latter more
> particular. Darren?
Yes, I had the same thought, but wasn't going to request the change just for
this. Andriy did point out the pointer format below previously however. Please
do correct that - updating INTER to IFACE would be a welcome improvement as
well.
> > - size = resource_size(res);
> > - ipcdev.punit_base2 = res->start;
> > - ipcdev.punit_size2 = size;
> > - dev_info(&pdev->dev, "punit interface res: %llx %x\n",
> > + /* This is index 1 to cover BIOS interface register */
> > + *++punit_res = *res;
> > + dev_info(&pdev->dev, "punit BIOS interface res: %llx %x\n",
> > + (long long)res->start, (int)resource_size(res));
>
> There is a specifier to print struct resource, please use it instead.
> %pR IIRC.
>
Yes, %pR, see Documentation/printk-formats.txt
> Same for all similar cases below.
>
--
Darren Hart
Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver
2015-12-10 11:23 ` Andy Shevchenko
@ 2015-12-10 23:01 ` Darren Hart
2015-12-11 7:54 ` Zha, Qipeng
0 siblings, 1 reply; 7+ messages in thread
From: Darren Hart @ 2015-12-10 23:01 UTC (permalink / raw)
To: Andy Shevchenko; +Cc: Qipeng Zha, platform-driver-x86
On Thu, Dec 10, 2015 at 01:23:05PM +0200, Andy Shevchenko wrote:
> On Fri, 2015-12-11 at 02:21 +0800, Qipeng Zha wrote:
> > This driver provides support for P-Unit mailbox IPC on Intel
> > platforms.
> > The heart of the P-Unit is the Foxton microcontroller and its
> > firmware,
> > which provide mailbox interface for power management usage.
> >
> > Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
>
> Couple of nitpicks below, otherwise finally my tag
>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> >
> > ---
> > change in v9
> > remove non-necessary cast for void pointer;
> > remove redundant error messages.
> >
> > change in v8
> > Change the way to get three IPCs's resources due to udpated acpi
> > entries,
> >
> > In the new acpi resources layout, two entries for each IPC, one for
> > data
> > and one for interface.
> >
> > change in v7
> > Update ipc_err_string()'s return type to "const char *" from "char
> > *";
> > Add terminator in acpi id array.
> >
> > change in v6
> > Update header file;
> > Update interface of lowlevel register access;
> > Restructure implementation of two command functions;
> > Save IPC private data pointer to pdev's priv;
> >
> > change in v5
> > Fix commend style in header file;
> > Replace EINVAL with ENODEV in stub functions;
> > Replace ipc_err_sources array with ipc_err_string function;
> > Correct comments: "if invalid" -> "if not used";
> > Propagate return error of devm_request_irq.
> >
> > change in v4
> > Fix two code style issues: make /* as a whole line and replace
> > "return ret" with "goto out";
> > Replace -EINVAL with -ENXIO for failures due to resource.
> >
> > change in v3
> > Fix compile issue in intel_punit_ipc.h, it happened when built-in
> > and the header file is included in other source file.
> >
> > change in v2
> > Fix issues in code style and comments;
> > Remove "default y" in Kconfig;
> > Remove some header files;
> > Replace request_mem_region with devm_request_mem_region,
> > and same for request_irq;
> > Change to use prefix of IPC_PUNIT_ to define commands.
> > ---
> > MAINTAINERS | 4 +-
> > arch/x86/include/asm/intel_punit_ipc.h | 101 ++++++++++
> > drivers/platform/x86/Kconfig | 6 +
> > drivers/platform/x86/Makefile | 1 +
> > drivers/platform/x86/intel_punit_ipc.c | 336
> > +++++++++++++++++++++++++++++++++
> > 5 files changed, 447 insertions(+), 1 deletion(-)
> > create mode 100644 arch/x86/include/asm/intel_punit_ipc.h
> > create mode 100644 drivers/platform/x86/intel_punit_ipc.c
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 5192700..333a022 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -5683,12 +5683,14 @@ F: drivers/dma/mic_x100_dma.c
> > F: drivers/dma/mic_x100_dma.h
> > F Documentation/mic/
> >
> > -INTEL PMC IPC DRIVER
> > +INTEL PMC/P-Unit IPC DRIVER
> > M: Zha Qipeng<qipeng.zha@intel.com>
> > L: platform-driver-x86@vger.kernel.org
> > S: Maintained
> > F: drivers/platform/x86/intel_pmc_ipc.c
> > +F: drivers/platform/x86/intel_punit_ipc.c
> > F: arch/x86/include/asm/intel_pmc_ipc.h
> > +F: arch/x86/include/asm/intel_punit_ipc.h
> >
> > IOC3 ETHERNET DRIVER
> > M: Ralf Baechle <ralf@linux-mips.org>
> > diff --git a/arch/x86/include/asm/intel_punit_ipc.h
> > b/arch/x86/include/asm/intel_punit_ipc.h
> > new file mode 100644
> > index 0000000..201eb9d
> > --- /dev/null
> > +++ b/arch/x86/include/asm/intel_punit_ipc.h
> > @@ -0,0 +1,101 @@
> > +#ifndef _ASM_X86_INTEL_PUNIT_IPC_H_
> > +#define _ASM_X86_INTEL_PUNIT_IPC_H_
> > +
> > +/*
> > + * Three types of 8bit P-Unit IPC commands are supported,
> > + * bit[7:6]: [00]: BIOS; [01]: GTD; [10]: ISPD.
> > + */
> > +typedef enum {
> > + BIOS_IPC = 0,
> > + GTDRIVER_IPC,
> > + ISPDRIVER_IPC,
> > + RESERVED_IPC,
> > +} IPC_TYPE;
> > +
> > +#define IPC_TYPE_OFFSET 6
> > +#define IPC_PUNIT_BIOS_CMD_BASE (BIOS_IPC <<
> > IPC_TYPE_OFFSET)
> > +#define IPC_PUNIT_GTD_CMD_BASE (GTDDRIVER_IPC <<
> > IPC_TYPE_OFFSET)
> > +#define IPC_PUNIT_ISPD_CMD_BASE (ISPDRIVER_IPC <<
> > IPC_TYPE_OFFSET)
> > +#define IPC_PUNIT_CMD_TYPE_MASK (RESERVED_IPC <<
> > IPC_TYPE_OFFSET)
> > +
> > +/* BIOS => Pcode commands */
> > +#define IPC_PUNIT_BIOS_ZERO (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x00)
> > +#define IPC_PUNIT_BIOS_VR_INTERFACE (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x01)
> > +#define IPC_PUNIT_BIOS_READ_PCS (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x02)
> > +#define IPC_PUNIT_BIOS_WRITE_PCS (IPC_PUNIT_BIOS_CMD_
> > BASE | 0x03)
> > +#define IPC_PUNIT_BIOS_READ_PCU_CONFIG (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x04)
> > +#define IPC_PUNIT_BIOS_WRITE_PCU_CONFIG (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x05)
> > +#define IPC_PUNIT_BIOS_READ_PL1_SETTING (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x06)
> > +#define IPC_PUNIT_BIOS_WRITE_PL1_SETTING (IPC_PUNIT_BIOS_CMD_
> > BASE | 0x07)
> > +#define IPC_PUNIT_BIOS_TRIGGER_VDD_RAM (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x08)
> > +#define IPC_PUNIT_BIOS_READ_TELE_INFO (IPC_PUNIT_BIOS
> > _CMD_BASE | 0x09)
> > +#define IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x0a)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_
> > CMD_BASE | 0x0b)
> > +#define IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x0c)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_
> > CMD_BASE | 0x0d)
> > +#define IPC_PUNIT_BIOS_READ_TELE_TRACE (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x0e)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x0f)
> > +#define IPC_PUNIT_BIOS_READ_TELE_EVENT (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x10)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x11)
> > +#define IPC_PUNIT_BIOS_READ_MODULE_TEMP (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x12)
> > +#define IPC_PUNIT_BIOS_RESERVED (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x13)
> > +#define IPC_PUNIT_BIOS_READ_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD_
> > BASE | 0x14)
> > +#define IPC_PUNIT_BIOS_WRITE_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD
> > _BASE | 0x15)
> > +#define IPC_PUNIT_BIOS_READ_RATIO_OVER (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x16)
> > +#define IPC_PUNIT_BIOS_WRITE_RATIO_OVER (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x17)
> > +#define IPC_PUNIT_BIOS_READ_VF_GL_CTRL (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x18)
> > +#define IPC_PUNIT_BIOS_WRITE_VF_GL_CTRL (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x19)
> > +#define IPC_PUNIT_BIOS_READ_FM_SOC_TEMP_THRESH (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x1a)
> > +#define IPC_PUNIT_BIOS_WRITE_FM_SOC_TEMP_THRESH (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x1b)
> > +
> > +/* GT Driver => Pcode commands */
> > +#define IPC_PUNIT_GTD_ZERO (IPC_PUNIT_GTD_CMD
> > _BASE | 0x00)
> > +#define IPC_PUNIT_GTD_CONFIG (IPC_PUNIT_GTD_C
> > MD_BASE | 0x01)
> > +#define IPC_PUNIT_GTD_READ_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD_
> > CMD_BASE | 0x02)
> > +#define IPC_PUNIT_GTD_WRITE_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD
> > _CMD_BASE | 0x03)
> > +#define IPC_PUNIT_GTD_GET_WM_VAL (IPC_PUNIT_GTD_CMD_B
> > ASE | 0x06)
> > +#define IPC_PUNIT_GTD_WRITE_CONFIG_WISHREQ (IPC_PUNIT_GTD_CMD
> > _BASE | 0x07)
> > +#define IPC_PUNIT_GTD_READ_REQ_DUTY_CYCLE (IPC_PUNIT_GTD_CMD_
> > BASE | 0x16)
> > +#define IPC_PUNIT_GTD_DIS_VOL_FREQ_CHG_REQUEST (IPC_PUNIT_GTD
> > _CMD_BASE | 0x17)
> > +#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_CTRL (IPC_PUNIT_GTD_CMD
> > _BASE | 0x1a)
> > +#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_TUNING (IPC_PUNIT_GTD_C
> > MD_BASE | 0x1c)
> > +
> > +/* ISP Driver => Pcode commands */
> > +#define IPC_PUNIT_ISPD_ZERO (IPC_PUNIT_ISPD_C
> > MD_BASE | 0x00)
> > +#define IPC_PUNIT_ISPD_CONFIG (IPC_PUNIT_ISPD
> > _CMD_BASE | 0x01)
> > +#define IPC_PUNIT_ISPD_GET_ISP_LTR_VAL (IPC_PUNIT_ISP
> > D_CMD_BASE | 0x02)
> > +#define IPC_PUNIT_ISPD_ACCESS_IU_FREQ_BOUNDS (IPC_PUNIT_ISPD_
> > CMD_BASE | 0x03)
> > +#define IPC_PUNIT_ISPD_READ_CDYN_LEVEL (IPC_PUNIT_ISP
> > D_CMD_BASE | 0x04)
> > +#define IPC_PUNIT_ISPD_WRITE_CDYN_LEVEL (IPC_PUNIT_IS
> > PD_CMD_BASE | 0x05)
> > +
> > +/* Error codes */
> > +#define IPC_PUNIT_ERR_SUCCESS 0
> > +#define IPC_PUNIT_ERR_INVALID_CMD 1
> > +#define IPC_PUNIT_ERR_INVALID_PARAMETER 2
> > +#define IPC_PUNIT_ERR_CMD_TIMEOUT 3
> > +#define IPC_PUNIT_ERR_CMD_LOCKED 4
> > +#define IPC_PUNIT_ERR_INVALID_VR_ID 5
> > +#define IPC_PUNIT_ERR_VR_ERR 6
> > +
> > +#if IS_ENABLED(CONFIG_INTEL_PUNIT_IPC)
> > +
> > +int intel_punit_ipc_simple_command(int cmd, int para1, int para2);
> > +int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in,
> > u32 *out);
> > +
> > +#else
> > +
> > +static inline int intel_punit_ipc_simple_command(int cmd,
> > + int para1, int
> > para2)
> > +{
> > + return -ENODEV;
> > +}
> > +
> > +static inline int intel_punit_ipc_command(u32 cmd, u32 para1, u32
> > para2,
> > + u32 *in, u32 *out)
> > +{
> > + return -ENODEV;
> > +}
> > +
> > +#endif /* CONFIG_INTEL_PUNIT_IPC */
> > +
> > +#endif
> > diff --git a/drivers/platform/x86/Kconfig
> > b/drivers/platform/x86/Kconfig
> > index 1089eaa..148ff88 100644
> > --- a/drivers/platform/x86/Kconfig
> > +++ b/drivers/platform/x86/Kconfig
> > @@ -944,4 +944,10 @@ config SURFACE_PRO3_BUTTON
> > depends on ACPI && INPUT
> > ---help---
> > This driver handles the power/home/volume buttons on the
> > Microsoft Surface Pro 3 tablet.
> > +
> > +config INTEL_PUNIT_IPC
> > + tristate "Intel P-Unit IPC Driver"
> > + ---help---
> > + This driver provides support for Intel P-Unit Mailbox IPC
> > mechanism,
> > + which is used to bridge the communications between kernel
> > and P-Unit.
> > endif # X86_PLATFORM_DEVICES
> > diff --git a/drivers/platform/x86/Makefile
> > b/drivers/platform/x86/Makefile
> > index 3ca78a3..5ee5425 100644
> > --- a/drivers/platform/x86/Makefile
> > +++ b/drivers/platform/x86/Makefile
> > @@ -62,3 +62,4 @@ obj-$(CONFIG_PVPANIC) += pvpanic.o
> > obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
> > obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
> > obj-$(CONFIG_SURFACE_PRO3_BUTTON) += surfacepro3_button.o
> > +obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
> > diff --git a/drivers/platform/x86/intel_punit_ipc.c
> > b/drivers/platform/x86/intel_punit_ipc.c
> > new file mode 100644
> > index 0000000..e6354a7
> > --- /dev/null
> > +++ b/drivers/platform/x86/intel_punit_ipc.c
> > @@ -0,0 +1,336 @@
> > +/*
> > + * Driver for the Intel P-Unit Mailbox IPC mechanism
> > + *
> > + * (C) Copyright 2015 Intel Corporation
> > + *
> > + * This program is free software; you can redistribute it and/or
> > modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + *
> > + * The heart of the P-Unit is the Foxton microcontroller and its
> > firmware,
> > + * which provide mailbox interface for power management usage.
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/acpi.h>
> > +#include <linux/delay.h>
> > +#include <linux/device.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/platform_device.h>
> > +#include <asm/intel_punit_ipc.h>
> > +
> > +/* IPC Mailbox registers */
> > +#define OFFSET_DATA_LOW 0x0
> > +#define OFFSET_DATA_HIGH 0x4
> > +/* bit field of interface register */
> > +#define CMD_RUN (1 << 31)
> > +#define CMD_ERRCODE_MASK 0xFF
>
> #include <linux/bitops.h>
>
> …BIT(31)
> …GENMASK(7,0)
>
> > +#define CMD_PARA1_SHIFT 8
> > +#define CMD_PARA2_SHIFT 16
> > +
> > +#define CMD_TIMEOUT_SECONDS 1
> > +
> > +enum {
> > + DATA = 0,
> > + INTERFACE,
>
> BASE_DATA
> BASE_IFACE (or BASE_INTERFACE if you prefer, though better to be in
> align across those two drivers)
> BASE_MAX
>
>
> > +};
> > +
> > +typedef struct {
> > + struct device *dev;
> > + struct mutex lock;
> > + int irq;
> > + struct completion cmd_complete;
> > + /* base of interface and data registers */
> > + void __iomem *base[RESERVED_IPC][INTERFACE + 1];
>
> …[][BASE_MAX];
>
These are solid improvements. Qipeng, one more spin please and we can have this
in next by the weekend. I'm personally much more confident in this driver.
Thanks to Andriy for his careful review, and thank you for sticking with it.
--
Darren Hart
Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver
2015-12-10 23:01 ` Darren Hart
@ 2015-12-11 7:54 ` Zha, Qipeng
0 siblings, 0 replies; 7+ messages in thread
From: Zha, Qipeng @ 2015-12-11 7:54 UTC (permalink / raw)
To: Darren Hart, Andy Shevchenko; +Cc: platform-driver-x86
Darren, Andy
Great thanks your kind, professional review.
Just sent out v10, I sent twice since I don't receive patch set 2 after first time.
They are same, sorry for the trouble.
Best wishes
Qipeng
-----Original Message-----
From: platform-driver-x86-owner@vger.kernel.org [mailto:platform-driver-x86-owner@vger.kernel.org] On Behalf Of Darren Hart
Sent: Friday, December 11, 2015 7:02 AM
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Zha, Qipeng <qipeng.zha@intel.com>; platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver
On Thu, Dec 10, 2015 at 01:23:05PM +0200, Andy Shevchenko wrote:
> On Fri, 2015-12-11 at 02:21 +0800, Qipeng Zha wrote:
> > This driver provides support for P-Unit mailbox IPC on Intel
> > platforms.
> > The heart of the P-Unit is the Foxton microcontroller and its
> > firmware, which provide mailbox interface for power management
> > usage.
> >
> > Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
>
> Couple of nitpicks below, otherwise finally my tag
>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> >
> > ---
> > change in v9
> > remove non-necessary cast for void pointer;
> > remove redundant error messages.
> >
> > change in v8
> > Change the way to get three IPCs's resources due to udpated acpi
> > entries,
> >
> > In the new acpi resources layout, two entries for each IPC, one for
> > data and one for interface.
> >
> > change in v7
> > Update ipc_err_string()'s return type to "const char *" from "char
> > *";
> > Add terminator in acpi id array.
> >
> > change in v6
> > Update header file;
> > Update interface of lowlevel register access;
> > Restructure implementation of two command functions;
> > Save IPC private data pointer to pdev's priv;
> >
> > change in v5
> > Fix commend style in header file;
> > Replace EINVAL with ENODEV in stub functions;
> > Replace ipc_err_sources array with ipc_err_string function;
> > Correct comments: "if invalid" -> "if not used";
> > Propagate return error of devm_request_irq.
> >
> > change in v4
> > Fix two code style issues: make /* as a whole line and replace
> > "return ret" with "goto out";
> > Replace -EINVAL with -ENXIO for failures due to resource.
> >
> > change in v3
> > Fix compile issue in intel_punit_ipc.h, it happened when built-in
> > and the header file is included in other source file.
> >
> > change in v2
> > Fix issues in code style and comments;
> > Remove "default y" in Kconfig;
> > Remove some header files;
> > Replace request_mem_region with devm_request_mem_region, and same
> > for request_irq;
> > Change to use prefix of IPC_PUNIT_ to define commands.
> > ---
> > MAINTAINERS | 4 +-
> > arch/x86/include/asm/intel_punit_ipc.h | 101 ++++++++++
> > drivers/platform/x86/Kconfig | 6 +
> > drivers/platform/x86/Makefile | 1 +
> > drivers/platform/x86/intel_punit_ipc.c | 336
> > +++++++++++++++++++++++++++++++++
> > 5 files changed, 447 insertions(+), 1 deletion(-)
> > create mode 100644 arch/x86/include/asm/intel_punit_ipc.h
> > create mode 100644 drivers/platform/x86/intel_punit_ipc.c
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS index 5192700..333a022 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -5683,12 +5683,14 @@ F: drivers/dma/mic_x100_dma.c
> > F: drivers/dma/mic_x100_dma.h
> > F Documentation/mic/
> >
> > -INTEL PMC IPC DRIVER
> > +INTEL PMC/P-Unit IPC DRIVER
> > M: Zha Qipeng<qipeng.zha@intel.com>
> > L: platform-driver-x86@vger.kernel.org
> > S: Maintained
> > F: drivers/platform/x86/intel_pmc_ipc.c
> > +F: drivers/platform/x86/intel_punit_ipc.c
> > F: arch/x86/include/asm/intel_pmc_ipc.h
> > +F: arch/x86/include/asm/intel_punit_ipc.h
> >
> > IOC3 ETHERNET DRIVER
> > M: Ralf Baechle <ralf@linux-mips.org>
> > diff --git a/arch/x86/include/asm/intel_punit_ipc.h
> > b/arch/x86/include/asm/intel_punit_ipc.h
> > new file mode 100644
> > index 0000000..201eb9d
> > --- /dev/null
> > +++ b/arch/x86/include/asm/intel_punit_ipc.h
> > @@ -0,0 +1,101 @@
> > +#ifndef _ASM_X86_INTEL_PUNIT_IPC_H_ #define
> > +_ASM_X86_INTEL_PUNIT_IPC_H_
> > +
> > +/*
> > + * Three types of 8bit P-Unit IPC commands are supported,
> > + * bit[7:6]: [00]: BIOS; [01]: GTD; [10]: ISPD.
> > + */
> > +typedef enum {
> > + BIOS_IPC = 0,
> > + GTDRIVER_IPC,
> > + ISPDRIVER_IPC,
> > + RESERVED_IPC,
> > +} IPC_TYPE;
> > +
> > +#define IPC_TYPE_OFFSET 6
> > +#define IPC_PUNIT_BIOS_CMD_BASE (BIOS_IPC <<
> > IPC_TYPE_OFFSET)
> > +#define IPC_PUNIT_GTD_CMD_BASE (GTDDRIVER_IPC <<
> > IPC_TYPE_OFFSET)
> > +#define IPC_PUNIT_ISPD_CMD_BASE (ISPDRIVER_IPC <<
> > IPC_TYPE_OFFSET)
> > +#define IPC_PUNIT_CMD_TYPE_MASK (RESERVED_IPC <<
> > IPC_TYPE_OFFSET)
> > +
> > +/* BIOS => Pcode commands */
> > +#define IPC_PUNIT_BIOS_ZERO (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x00)
> > +#define IPC_PUNIT_BIOS_VR_INTERFACE (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x01)
> > +#define IPC_PUNIT_BIOS_READ_PCS (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x02)
> > +#define IPC_PUNIT_BIOS_WRITE_PCS (IPC_PUNIT_BIOS_CMD_
> > BASE | 0x03)
> > +#define IPC_PUNIT_BIOS_READ_PCU_CONFIG (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x04)
> > +#define IPC_PUNIT_BIOS_WRITE_PCU_CONFIG (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x05)
> > +#define IPC_PUNIT_BIOS_READ_PL1_SETTING (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x06)
> > +#define IPC_PUNIT_BIOS_WRITE_PL1_SETTING (IPC_PUNIT_BIOS_CMD_
> > BASE | 0x07)
> > +#define IPC_PUNIT_BIOS_TRIGGER_VDD_RAM (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x08)
> > +#define IPC_PUNIT_BIOS_READ_TELE_INFO (IPC_PUNIT_BIOS
> > _CMD_BASE | 0x09)
> > +#define IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x0a)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL (IPC_PUNIT_BIOS_
> > CMD_BASE | 0x0b)
> > +#define IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_C
> > MD_BASE | 0x0c)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL (IPC_PUNIT_BIOS_
> > CMD_BASE | 0x0d)
> > +#define IPC_PUNIT_BIOS_READ_TELE_TRACE (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x0e)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_TRACE (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x0f)
> > +#define IPC_PUNIT_BIOS_READ_TELE_EVENT (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x10)
> > +#define IPC_PUNIT_BIOS_WRITE_TELE_EVENT (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x11)
> > +#define IPC_PUNIT_BIOS_READ_MODULE_TEMP (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x12)
> > +#define IPC_PUNIT_BIOS_RESERVED (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x13)
> > +#define IPC_PUNIT_BIOS_READ_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD_
> > BASE | 0x14)
> > +#define IPC_PUNIT_BIOS_WRITE_VOLTAGE_OVER (IPC_PUNIT_BIOS_CMD
> > _BASE | 0x15)
> > +#define IPC_PUNIT_BIOS_READ_RATIO_OVER (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x16)
> > +#define IPC_PUNIT_BIOS_WRITE_RATIO_OVER (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x17)
> > +#define IPC_PUNIT_BIOS_READ_VF_GL_CTRL (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x18)
> > +#define IPC_PUNIT_BIOS_WRITE_VF_GL_CTRL (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x19)
> > +#define IPC_PUNIT_BIOS_READ_FM_SOC_TEMP_THRESH (IPC_PUNIT_BIO
> > S_CMD_BASE | 0x1a)
> > +#define IPC_PUNIT_BIOS_WRITE_FM_SOC_TEMP_THRESH (IPC_PUNIT_BI
> > OS_CMD_BASE | 0x1b)
> > +
> > +/* GT Driver => Pcode commands */
> > +#define IPC_PUNIT_GTD_ZERO (IPC_PUNIT_GTD_CMD
> > _BASE | 0x00)
> > +#define IPC_PUNIT_GTD_CONFIG (IPC_PUNIT_GTD_C
> > MD_BASE | 0x01)
> > +#define IPC_PUNIT_GTD_READ_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD_
> > CMD_BASE | 0x02)
> > +#define IPC_PUNIT_GTD_WRITE_ICCP_LIC_CDYN_SCAL (IPC_PUNIT_GTD
> > _CMD_BASE | 0x03)
> > +#define IPC_PUNIT_GTD_GET_WM_VAL (IPC_PUNIT_GTD_CMD_B
> > ASE | 0x06)
> > +#define IPC_PUNIT_GTD_WRITE_CONFIG_WISHREQ (IPC_PUNIT_GTD_CMD
> > _BASE | 0x07)
> > +#define IPC_PUNIT_GTD_READ_REQ_DUTY_CYCLE (IPC_PUNIT_GTD_CMD_
> > BASE | 0x16)
> > +#define IPC_PUNIT_GTD_DIS_VOL_FREQ_CHG_REQUEST (IPC_PUNIT_GTD
> > _CMD_BASE | 0x17)
> > +#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_CTRL (IPC_PUNIT_GTD_CMD
> > _BASE | 0x1a)
> > +#define IPC_PUNIT_GTD_DYNA_DUTY_CYCLE_TUNING (IPC_PUNIT_GTD_C
> > MD_BASE | 0x1c)
> > +
> > +/* ISP Driver => Pcode commands */
> > +#define IPC_PUNIT_ISPD_ZERO (IPC_PUNIT_ISPD_C
> > MD_BASE | 0x00)
> > +#define IPC_PUNIT_ISPD_CONFIG (IPC_PUNIT_ISPD
> > _CMD_BASE | 0x01)
> > +#define IPC_PUNIT_ISPD_GET_ISP_LTR_VAL (IPC_PUNIT_ISP
> > D_CMD_BASE | 0x02)
> > +#define IPC_PUNIT_ISPD_ACCESS_IU_FREQ_BOUNDS (IPC_PUNIT_ISPD_
> > CMD_BASE | 0x03)
> > +#define IPC_PUNIT_ISPD_READ_CDYN_LEVEL (IPC_PUNIT_ISP
> > D_CMD_BASE | 0x04)
> > +#define IPC_PUNIT_ISPD_WRITE_CDYN_LEVEL (IPC_PUNIT_IS
> > PD_CMD_BASE | 0x05)
> > +
> > +/* Error codes */
> > +#define IPC_PUNIT_ERR_SUCCESS 0
> > +#define IPC_PUNIT_ERR_INVALID_CMD 1
> > +#define IPC_PUNIT_ERR_INVALID_PARAMETER 2
> > +#define IPC_PUNIT_ERR_CMD_TIMEOUT 3
> > +#define IPC_PUNIT_ERR_CMD_LOCKED 4
> > +#define IPC_PUNIT_ERR_INVALID_VR_ID 5
> > +#define IPC_PUNIT_ERR_VR_ERR 6
> > +
> > +#if IS_ENABLED(CONFIG_INTEL_PUNIT_IPC)
> > +
> > +int intel_punit_ipc_simple_command(int cmd, int para1, int para2);
> > +int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in,
> > u32 *out);
> > +
> > +#else
> > +
> > +static inline int intel_punit_ipc_simple_command(int cmd,
> > + int para1, int
> > para2)
> > +{
> > + return -ENODEV;
> > +}
> > +
> > +static inline int intel_punit_ipc_command(u32 cmd, u32 para1, u32
> > para2,
> > + u32 *in, u32 *out)
> > +{
> > + return -ENODEV;
> > +}
> > +
> > +#endif /* CONFIG_INTEL_PUNIT_IPC */
> > +
> > +#endif
> > diff --git a/drivers/platform/x86/Kconfig
> > b/drivers/platform/x86/Kconfig index 1089eaa..148ff88 100644
> > --- a/drivers/platform/x86/Kconfig
> > +++ b/drivers/platform/x86/Kconfig
> > @@ -944,4 +944,10 @@ config SURFACE_PRO3_BUTTON
> > depends on ACPI && INPUT
> > ---help---
> > This driver handles the power/home/volume buttons on the
> > Microsoft Surface Pro 3 tablet.
> > +
> > +config INTEL_PUNIT_IPC
> > + tristate "Intel P-Unit IPC Driver"
> > + ---help---
> > + This driver provides support for Intel P-Unit Mailbox IPC
> > mechanism,
> > + which is used to bridge the communications between kernel
> > and P-Unit.
> > endif # X86_PLATFORM_DEVICES
> > diff --git a/drivers/platform/x86/Makefile
> > b/drivers/platform/x86/Makefile index 3ca78a3..5ee5425 100644
> > --- a/drivers/platform/x86/Makefile
> > +++ b/drivers/platform/x86/Makefile
> > @@ -62,3 +62,4 @@ obj-$(CONFIG_PVPANIC) += pvpanic.o
> > obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
> > obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
> > obj-$(CONFIG_SURFACE_PRO3_BUTTON) += surfacepro3_button.o
> > +obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
> > diff --git a/drivers/platform/x86/intel_punit_ipc.c
> > b/drivers/platform/x86/intel_punit_ipc.c
> > new file mode 100644
> > index 0000000..e6354a7
> > --- /dev/null
> > +++ b/drivers/platform/x86/intel_punit_ipc.c
> > @@ -0,0 +1,336 @@
> > +/*
> > + * Driver for the Intel P-Unit Mailbox IPC mechanism
> > + *
> > + * (C) Copyright 2015 Intel Corporation
> > + *
> > + * This program is free software; you can redistribute it and/or
> > modify
> > + * it under the terms of the GNU General Public License version 2
> > + as
> > + * published by the Free Software Foundation.
> > + *
> > + * The heart of the P-Unit is the Foxton microcontroller and its
> > firmware,
> > + * which provide mailbox interface for power management usage.
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/acpi.h>
> > +#include <linux/delay.h>
> > +#include <linux/device.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/platform_device.h>
> > +#include <asm/intel_punit_ipc.h>
> > +
> > +/* IPC Mailbox registers */
> > +#define OFFSET_DATA_LOW 0x0
> > +#define OFFSET_DATA_HIGH 0x4
> > +/* bit field of interface register */
> > +#define CMD_RUN (1 << 31)
> > +#define CMD_ERRCODE_MASK 0xFF
>
> #include <linux/bitops.h>
>
> …BIT(31)
> …GENMASK(7,0)
>
> > +#define CMD_PARA1_SHIFT 8
> > +#define CMD_PARA2_SHIFT 16
> > +
> > +#define CMD_TIMEOUT_SECONDS 1
> > +
> > +enum {
> > + DATA = 0,
> > + INTERFACE,
>
> BASE_DATA
> BASE_IFACE (or BASE_INTERFACE if you prefer, though better to be in
> align across those two drivers) BASE_MAX
>
>
> > +};
> > +
> > +typedef struct {
> > + struct device *dev;
> > + struct mutex lock;
> > + int irq;
> > + struct completion cmd_complete;
> > + /* base of interface and data registers */
> > + void __iomem *base[RESERVED_IPC][INTERFACE + 1];
>
> …[][BASE_MAX];
>
These are solid improvements. Qipeng, one more spin please and we can have this in next by the weekend. I'm personally much more confident in this driver.
Thanks to Andriy for his careful review, and thank you for sticking with it.
--
Darren Hart
Intel Open Source Technology Center
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^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-12-11 7:54 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-12-10 18:21 [PATCH V9 1/2] intel_pmc_ipc: update acpi resource structure for Punit Qipeng Zha
2015-12-10 11:13 ` Andy Shevchenko
2015-12-10 22:59 ` Darren Hart
2015-12-10 18:21 ` [PATCH V9 2/2] platform:x86: add Intel P-Unit mailbox IPC driver Qipeng Zha
2015-12-10 11:23 ` Andy Shevchenko
2015-12-10 23:01 ` Darren Hart
2015-12-11 7:54 ` Zha, Qipeng
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