From: Lizhi Hou <lizhi.hou@xilinx.com>
To: <linux-kernel@vger.kernel.org>
Cc: Lizhi Hou <lizhih@xilinx.com>, <linux-fpga@vger.kernel.org>,
<maxz@xilinx.com>, <sonal.santan@xilinx.com>,
<michal.simek@xilinx.com>, <stefanos@xilinx.com>,
<devicetree@vger.kernel.org>, <trix@redhat.com>, <mdf@kernel.org>,
<robh@kernel.org>, Max Zhen <max.zhen@xilinx.com>
Subject: [PATCH V3 XRT Alveo 13/18] fpga: xrt: devctl platform driver
Date: Wed, 17 Feb 2021 22:40:14 -0800 [thread overview]
Message-ID: <20210218064019.29189-14-lizhih@xilinx.com> (raw)
In-Reply-To: <20210218064019.29189-1-lizhih@xilinx.com>
Add devctl driver. devctl is a type of hardware function which only has
few registers to read or write. They are discovered by walking firmware
metadata. A platform device node will be created for them.
Signed-off-by: Sonal Santan <sonal.santan@xilinx.com>
Signed-off-by: Max Zhen <max.zhen@xilinx.com>
Signed-off-by: Lizhi Hou <lizhih@xilinx.com>
---
drivers/fpga/xrt/include/xleaf/devctl.h | 43 +++++
drivers/fpga/xrt/lib/xleaf/devctl.c | 206 ++++++++++++++++++++++++
2 files changed, 249 insertions(+)
create mode 100644 drivers/fpga/xrt/include/xleaf/devctl.h
create mode 100644 drivers/fpga/xrt/lib/xleaf/devctl.c
diff --git a/drivers/fpga/xrt/include/xleaf/devctl.h b/drivers/fpga/xrt/include/xleaf/devctl.h
new file mode 100644
index 000000000000..96a40e066f83
--- /dev/null
+++ b/drivers/fpga/xrt/include/xleaf/devctl.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Header file for XRT DEVCTL Leaf Driver
+ *
+ * Copyright (C) 2020-2021 Xilinx, Inc.
+ *
+ * Authors:
+ * Lizhi Hou <Lizhi.Hou@xilinx.com>
+ */
+
+#ifndef _XRT_DEVCTL_H_
+#define _XRT_DEVCTL_H_
+
+#include "xleaf.h"
+
+/*
+ * DEVCTL driver IOCTL calls.
+ */
+enum xrt_devctl_ioctl_cmd {
+ XRT_DEVCTL_READ = XRT_XLEAF_CUSTOM_BASE, /* See comments in xleaf.h */
+ XRT_DEVCTL_WRITE,
+};
+
+enum xrt_devctl_id {
+ XRT_DEVCTL_ROM_UUID,
+ XRT_DEVCTL_DDR_CALIB,
+ XRT_DEVCTL_GOLDEN_VER,
+ XRT_DEVCTL_MAX
+};
+
+struct xrt_devctl_ioctl_rw {
+ u32 xgir_id;
+ void *xgir_buf;
+ u32 xgir_len;
+ u32 xgir_offset;
+};
+
+struct xrt_devctl_ioctl_intf_uuid {
+ u32 xgir_uuid_num;
+ uuid_t *xgir_uuids;
+};
+
+#endif /* _XRT_DEVCTL_H_ */
diff --git a/drivers/fpga/xrt/lib/xleaf/devctl.c b/drivers/fpga/xrt/lib/xleaf/devctl.c
new file mode 100644
index 000000000000..caf8c6569f0f
--- /dev/null
+++ b/drivers/fpga/xrt/lib/xleaf/devctl.c
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Alveo FPGA devctl Driver
+ *
+ * Copyright (C) 2020-2021 Xilinx, Inc.
+ *
+ * Authors:
+ * Lizhi Hou<Lizhi.Hou@xilinx.com>
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include "metadata.h"
+#include "xleaf.h"
+#include "xleaf/devctl.h"
+
+#define XRT_DEVCTL "xrt_devctl"
+
+struct xrt_name_id {
+ char *ep_name;
+ int id;
+};
+
+static struct xrt_name_id name_id[XRT_DEVCTL_MAX] = {
+ { XRT_MD_NODE_BLP_ROM, XRT_DEVCTL_ROM_UUID },
+ { XRT_MD_NODE_GOLDEN_VER, XRT_DEVCTL_GOLDEN_VER },
+};
+
+struct xrt_devctl {
+ struct platform_device *pdev;
+ void __iomem *base_addrs[XRT_DEVCTL_MAX];
+ ulong sizes[XRT_DEVCTL_MAX];
+};
+
+static int xrt_devctl_name2id(struct xrt_devctl *devctl, const char *name)
+{
+ int i;
+
+ for (i = 0; i < XRT_DEVCTL_MAX && name_id[i].ep_name; i++) {
+ if (!strncmp(name_id[i].ep_name, name, strlen(name_id[i].ep_name) + 1))
+ return name_id[i].id;
+ }
+
+ return -EINVAL;
+}
+
+static int
+xrt_devctl_leaf_ioctl(struct platform_device *pdev, u32 cmd, void *arg)
+{
+ struct xrt_devctl *devctl;
+ int ret = 0;
+
+ devctl = platform_get_drvdata(pdev);
+
+ switch (cmd) {
+ case XRT_XLEAF_EVENT:
+ /* Does not handle any event. */
+ break;
+ case XRT_DEVCTL_READ: {
+ struct xrt_devctl_ioctl_rw *rw_arg = arg;
+ u32 *p_src, *p_dst, i;
+
+ if (rw_arg->xgir_len & 0x3) {
+ xrt_err(pdev, "invalid len %d", rw_arg->xgir_len);
+ return -EINVAL;
+ }
+
+ if (rw_arg->xgir_id >= XRT_DEVCTL_MAX) {
+ xrt_err(pdev, "invalid id %d", rw_arg->xgir_id);
+ return -EINVAL;
+ }
+
+ p_src = devctl->base_addrs[rw_arg->xgir_id];
+ if (!p_src) {
+ xrt_err(pdev, "io not found, id %d",
+ rw_arg->xgir_id);
+ return -EINVAL;
+ }
+ if (rw_arg->xgir_offset + rw_arg->xgir_len >
+ devctl->sizes[rw_arg->xgir_id]) {
+ xrt_err(pdev, "invalid argument, off %d, len %d",
+ rw_arg->xgir_offset, rw_arg->xgir_len);
+ return -EINVAL;
+ }
+ p_dst = rw_arg->xgir_buf;
+ for (i = 0; i < rw_arg->xgir_len / sizeof(u32); i++) {
+ u32 val = ioread32(p_src + rw_arg->xgir_offset + i);
+
+ memcpy(p_dst + i, &val, sizeof(u32));
+ }
+ break;
+ }
+ default:
+ xrt_err(pdev, "unsupported cmd %d", cmd);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int xrt_devctl_remove(struct platform_device *pdev)
+{
+ struct xrt_devctl *devctl;
+ int i;
+
+ devctl = platform_get_drvdata(pdev);
+
+ for (i = 0; i < XRT_DEVCTL_MAX; i++) {
+ if (devctl->base_addrs[i])
+ iounmap(devctl->base_addrs[i]);
+ }
+
+ platform_set_drvdata(pdev, NULL);
+ devm_kfree(&pdev->dev, devctl);
+
+ return 0;
+}
+
+static int xrt_devctl_probe(struct platform_device *pdev)
+{
+ struct xrt_devctl *devctl;
+ int i, id, ret = 0;
+ struct resource *res;
+
+ devctl = devm_kzalloc(&pdev->dev, sizeof(*devctl), GFP_KERNEL);
+ if (!devctl)
+ return -ENOMEM;
+
+ devctl->pdev = pdev;
+ platform_set_drvdata(pdev, devctl);
+
+ xrt_info(pdev, "probing...");
+ for (i = 0, res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ res;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, ++i)) {
+ id = xrt_devctl_name2id(devctl, res->name);
+ if (id < 0) {
+ xrt_err(pdev, "ep %s not found", res->name);
+ continue;
+ }
+ devctl->base_addrs[id] = ioremap(res->start, res->end - res->start + 1);
+ if (!devctl->base_addrs[id]) {
+ xrt_err(pdev, "map base failed %pR", res);
+ ret = -EIO;
+ goto failed;
+ }
+ devctl->sizes[id] = res->end - res->start + 1;
+ }
+
+failed:
+ if (ret)
+ xrt_devctl_remove(pdev);
+
+ return ret;
+}
+
+static struct xrt_subdev_endpoints xrt_devctl_endpoints[] = {
+ {
+ .xse_names = (struct xrt_subdev_ep_names[]) {
+ /* add name if ep is in same partition */
+ { .ep_name = XRT_MD_NODE_BLP_ROM },
+ { NULL },
+ },
+ .xse_min_ep = 1,
+ },
+ {
+ .xse_names = (struct xrt_subdev_ep_names[]) {
+ { .ep_name = XRT_MD_NODE_GOLDEN_VER },
+ { NULL },
+ },
+ .xse_min_ep = 1,
+ },
+ /* adding ep bundle generates devctl device instance */
+ { 0 },
+};
+
+static struct xrt_subdev_drvdata xrt_devctl_data = {
+ .xsd_dev_ops = {
+ .xsd_ioctl = xrt_devctl_leaf_ioctl,
+ },
+};
+
+static const struct platform_device_id xrt_devctl_table[] = {
+ { XRT_DEVCTL, (kernel_ulong_t)&xrt_devctl_data },
+ { },
+};
+
+static struct platform_driver xrt_devctl_driver = {
+ .driver = {
+ .name = XRT_DEVCTL,
+ },
+ .probe = xrt_devctl_probe,
+ .remove = xrt_devctl_remove,
+ .id_table = xrt_devctl_table,
+};
+
+void devctl_leaf_init_fini(bool init)
+{
+ if (init)
+ xleaf_register_driver(XRT_SUBDEV_DEVCTL, &xrt_devctl_driver, xrt_devctl_endpoints);
+ else
+ xleaf_unregister_driver(XRT_SUBDEV_DEVCTL);
+}
--
2.18.4
next prev parent reply other threads:[~2021-02-18 6:57 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-18 6:40 [PATCH V3 XRT Alveo 00/18] XRT Alveo driver overview Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 01/18] Documentation: fpga: Add a document describing XRT Alveo drivers Lizhi Hou
2021-02-19 22:26 ` Tom Rix
2021-03-01 6:48 ` Sonal Santan
2021-03-06 17:19 ` Moritz Fischer
2021-03-08 20:12 ` Sonal Santan
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 02/18] fpga: xrt: driver metadata helper functions Lizhi Hou
2021-02-20 17:07 ` Tom Rix
2021-02-23 6:05 ` Lizhi Hou
2021-02-23 1:23 ` Fernando Pacheco
2021-02-25 20:27 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 03/18] fpga: xrt: xclbin file " Lizhi Hou
2021-02-21 17:12 ` Tom Rix
2021-02-21 18:33 ` Moritz Fischer
2021-03-06 1:13 ` Lizhi Hou
2021-02-26 21:23 ` Lizhi Hou
2021-02-28 16:54 ` Tom Rix
2021-03-02 0:25 ` Lizhi Hou
2021-03-02 15:14 ` Moritz Fischer
2021-03-04 18:53 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 04/18] fpga: xrt: xrt-lib platform driver manager Lizhi Hou
2021-02-21 20:39 ` Moritz Fischer
2021-03-01 20:34 ` Max Zhen
2021-02-22 15:05 ` Tom Rix
2021-02-23 3:35 ` Moritz Fischer
2021-03-03 17:20 ` Max Zhen
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 05/18] fpga: xrt: group platform driver Lizhi Hou
2021-02-22 18:50 ` Tom Rix
2021-02-26 21:57 ` Max Zhen
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 06/18] fpga: xrt: platform driver infrastructure Lizhi Hou
2021-02-25 21:59 ` Tom Rix
[not found] ` <13e9a311-2d04-ba65-3ed2-f9f1834c37de@xilinx.com>
2021-03-08 20:36 ` Max Zhen
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 07/18] fpga: xrt: management physical function driver (root) Lizhi Hou
2021-02-26 15:01 ` Tom Rix
2021-02-26 17:56 ` Moritz Fischer
2021-03-16 20:29 ` Max Zhen
2021-03-17 21:08 ` Tom Rix
2021-03-18 0:44 ` Max Zhen
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 08/18] fpga: xrt: main platform driver for management function device Lizhi Hou
2021-02-26 17:22 ` Tom Rix
2021-03-16 21:23 ` Lizhi Hou
2021-03-17 21:12 ` Tom Rix
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 09/18] fpga: xrt: fpga-mgr and region implementation for xclbin download Lizhi Hou
2021-02-28 16:36 ` Tom Rix
2021-03-04 17:50 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 10/18] fpga: xrt: VSEC platform driver Lizhi Hou
2021-03-01 19:01 ` Tom Rix
2021-03-05 19:58 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 11/18] fpga: xrt: UCS " Lizhi Hou
2021-03-02 16:09 ` Tom Rix
2021-03-10 20:24 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 12/18] fpga: xrt: ICAP " Lizhi Hou
2021-02-21 20:24 ` Moritz Fischer
2021-03-02 18:26 ` Lizhi Hou
2021-03-03 15:12 ` Tom Rix
2021-03-17 20:56 ` Lizhi Hou
2021-02-18 6:40 ` Lizhi Hou [this message]
2021-03-04 13:39 ` [PATCH V3 XRT Alveo 13/18] fpga: xrt: devctl " Tom Rix
2021-03-16 23:54 ` Lizhi Hou
2021-03-17 21:16 ` Tom Rix
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 14/18] fpga: xrt: clock " Lizhi Hou
2021-03-05 15:23 ` Tom Rix
2021-03-11 0:12 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 15/18] fpga: xrt: clock frequence counter " Lizhi Hou
2021-03-06 15:25 ` Tom Rix
2021-03-12 23:43 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 16/18] fpga: xrt: DDR calibration " Lizhi Hou
2021-02-21 20:21 ` Moritz Fischer
2021-03-06 15:34 ` Tom Rix
2021-03-13 0:45 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 17/18] fpga: xrt: partition isolation " Lizhi Hou
2021-02-21 20:36 ` Moritz Fischer
2021-03-16 20:38 ` Lizhi Hou
2021-03-06 15:54 ` Tom Rix
2021-03-13 6:53 ` Lizhi Hou
2021-02-18 6:40 ` [PATCH V3 XRT Alveo 18/18] fpga: xrt: Kconfig and Makefile updates for XRT drivers Lizhi Hou
2021-02-18 9:02 ` kernel test robot
2021-02-21 14:57 ` Tom Rix
2021-02-21 18:39 ` Moritz Fischer
2021-02-28 20:52 ` Sonal Santan
2021-02-18 13:52 ` [PATCH V3 XRT Alveo 00/18] XRT Alveo driver overview Tom Rix
2021-02-19 5:15 ` Lizhi Hou
2021-02-21 20:43 ` Moritz Fischer
2021-03-01 18:29 ` Lizhi Hou
2021-03-03 6:49 ` Joe Perches
2021-03-03 23:15 ` Moritz Fischer
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