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 16/18] fpga: xrt: DDR calibration platform driver
Date: Wed, 17 Feb 2021 22:40:17 -0800 [thread overview]
Message-ID: <20210218064019.29189-17-lizhih@xilinx.com> (raw)
In-Reply-To: <20210218064019.29189-1-lizhih@xilinx.com>
Add DDR calibration driver. DDR calibration is a hardware function
discovered by walking firmware metadata. A platform device node will
be created for it. Hardware provides DDR calibration status through
this function.
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/calib.h | 30 ++++
drivers/fpga/xrt/lib/xleaf/calib.c | 226 +++++++++++++++++++++++++
2 files changed, 256 insertions(+)
create mode 100644 drivers/fpga/xrt/include/xleaf/calib.h
create mode 100644 drivers/fpga/xrt/lib/xleaf/calib.c
diff --git a/drivers/fpga/xrt/include/xleaf/calib.h b/drivers/fpga/xrt/include/xleaf/calib.h
new file mode 100644
index 000000000000..f8aba4594c58
--- /dev/null
+++ b/drivers/fpga/xrt/include/xleaf/calib.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Header file for XRT DDR Calibration Leaf Driver
+ *
+ * Copyright (C) 2020-2021 Xilinx, Inc.
+ *
+ * Authors:
+ * Cheng Zhen <maxz@xilinx.com>
+ */
+
+#ifndef _XRT_CALIB_H_
+#define _XRT_CALIB_H_
+
+#include "xleaf.h"
+#include <linux/xrt/xclbin.h>
+
+/*
+ * Memory calibration driver IOCTL calls.
+ */
+enum xrt_calib_results {
+ XRT_CALIB_UNKNOWN,
+ XRT_CALIB_SUCCEEDED,
+ XRT_CALIB_FAILED,
+};
+
+enum xrt_calib_ioctl_cmd {
+ XRT_CALIB_RESULT = XRT_XLEAF_CUSTOM_BASE, /* See comments in xleaf.h */
+};
+
+#endif /* _XRT_CALIB_H_ */
diff --git a/drivers/fpga/xrt/lib/xleaf/calib.c b/drivers/fpga/xrt/lib/xleaf/calib.c
new file mode 100644
index 000000000000..fbb813636e76
--- /dev/null
+++ b/drivers/fpga/xrt/lib/xleaf/calib.c
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Alveo FPGA memory calibration driver
+ *
+ * Copyright (C) 2020-2021 Xilinx, Inc.
+ *
+ * memory calibration
+ *
+ * Authors:
+ * Lizhi Hou<Lizhi.Hou@xilinx.com>
+ */
+#include <linux/delay.h>
+#include "xclbin-helper.h"
+#include "metadata.h"
+#include "xleaf/calib.h"
+
+#define XRT_CALIB "xrt_calib"
+
+struct calib_cache {
+ struct list_head link;
+ const char *ep_name;
+ char *data;
+ u32 data_size;
+};
+
+struct calib {
+ struct platform_device *pdev;
+ void *calib_base;
+ struct mutex lock; /* calibration dev lock */
+ struct list_head cache_list;
+ u32 cache_num;
+ enum xrt_calib_results result;
+};
+
+#define CALIB_DONE(calib) \
+ (ioread32((calib)->calib_base) & BIT(0))
+
+static void calib_cache_clean_nolock(struct calib *calib)
+{
+ struct calib_cache *cache, *temp;
+
+ list_for_each_entry_safe(cache, temp, &calib->cache_list, link) {
+ vfree(cache->data);
+ list_del(&cache->link);
+ vfree(cache);
+ }
+ calib->cache_num = 0;
+}
+
+static void calib_cache_clean(struct calib *calib)
+{
+ mutex_lock(&calib->lock);
+ calib_cache_clean_nolock(calib);
+ mutex_unlock(&calib->lock);
+}
+
+static int calib_srsr(struct calib *calib, struct platform_device *srsr_leaf)
+{
+ return -EOPNOTSUPP;
+}
+
+static int calib_calibration(struct calib *calib)
+{
+ int i;
+
+ for (i = 0; i < 20; i++) {
+ if (CALIB_DONE(calib))
+ break;
+ msleep(500);
+ }
+
+ if (i == 20) {
+ xrt_err(calib->pdev,
+ "MIG calibration timeout after bitstream download");
+ return -ETIMEDOUT;
+ }
+
+ xrt_info(calib->pdev, "took %dms", i * 500);
+ return 0;
+}
+
+static void xrt_calib_event_cb(struct platform_device *pdev, void *arg)
+{
+ struct calib *calib = platform_get_drvdata(pdev);
+ struct xrt_event *evt = (struct xrt_event *)arg;
+ enum xrt_events e = evt->xe_evt;
+ enum xrt_subdev_id id = evt->xe_subdev.xevt_subdev_id;
+ int instance = evt->xe_subdev.xevt_subdev_instance;
+ struct platform_device *leaf;
+ int ret;
+
+ switch (e) {
+ case XRT_EVENT_POST_CREATION: {
+ if (id == XRT_SUBDEV_SRSR) {
+ leaf = xleaf_get_leaf_by_id(pdev,
+ XRT_SUBDEV_SRSR,
+ instance);
+ if (!leaf) {
+ xrt_err(pdev, "does not get SRSR subdev");
+ return;
+ }
+ ret = calib_srsr(calib, leaf);
+ xleaf_put_leaf(pdev, leaf);
+ calib->result =
+ ret ? XRT_CALIB_FAILED : XRT_CALIB_SUCCEEDED;
+ } else if (id == XRT_SUBDEV_UCS) {
+ ret = calib_calibration(calib);
+ calib->result =
+ ret ? XRT_CALIB_FAILED : XRT_CALIB_SUCCEEDED;
+ }
+ break;
+ }
+ default:
+ break;
+ }
+}
+
+static int xrt_calib_remove(struct platform_device *pdev)
+{
+ struct calib *calib = platform_get_drvdata(pdev);
+
+ calib_cache_clean(calib);
+
+ if (calib->calib_base)
+ iounmap(calib->calib_base);
+
+ platform_set_drvdata(pdev, NULL);
+ devm_kfree(&pdev->dev, calib);
+
+ return 0;
+}
+
+static int xrt_calib_probe(struct platform_device *pdev)
+{
+ struct calib *calib;
+ struct resource *res;
+ int err = 0;
+
+ calib = devm_kzalloc(&pdev->dev, sizeof(*calib), GFP_KERNEL);
+ if (!calib)
+ return -ENOMEM;
+
+ calib->pdev = pdev;
+ platform_set_drvdata(pdev, calib);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ goto failed;
+
+ calib->calib_base = ioremap(res->start, res->end - res->start + 1);
+ if (!calib->calib_base) {
+ err = -EIO;
+ xrt_err(pdev, "Map iomem failed");
+ goto failed;
+ }
+
+ mutex_init(&calib->lock);
+ INIT_LIST_HEAD(&calib->cache_list);
+
+ return 0;
+
+failed:
+ xrt_calib_remove(pdev);
+ return err;
+}
+
+static int
+xrt_calib_leaf_ioctl(struct platform_device *pdev, u32 cmd, void *arg)
+{
+ struct calib *calib = platform_get_drvdata(pdev);
+ int ret = 0;
+
+ switch (cmd) {
+ case XRT_XLEAF_EVENT:
+ xrt_calib_event_cb(pdev, arg);
+ break;
+ case XRT_CALIB_RESULT: {
+ enum xrt_calib_results *r = (enum xrt_calib_results *)arg;
+ *r = calib->result;
+ break;
+ }
+ default:
+ xrt_err(pdev, "unsupported cmd %d", cmd);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static struct xrt_subdev_endpoints xrt_calib_endpoints[] = {
+ {
+ .xse_names = (struct xrt_subdev_ep_names[]) {
+ { .ep_name = XRT_MD_NODE_DDR_CALIB },
+ { NULL },
+ },
+ .xse_min_ep = 1,
+ },
+ { 0 },
+};
+
+static struct xrt_subdev_drvdata xrt_calib_data = {
+ .xsd_dev_ops = {
+ .xsd_ioctl = xrt_calib_leaf_ioctl,
+ },
+};
+
+static const struct platform_device_id xrt_calib_table[] = {
+ { XRT_CALIB, (kernel_ulong_t)&xrt_calib_data },
+ { },
+};
+
+static struct platform_driver xrt_calib_driver = {
+ .driver = {
+ .name = XRT_CALIB,
+ },
+ .probe = xrt_calib_probe,
+ .remove = xrt_calib_remove,
+ .id_table = xrt_calib_table,
+};
+
+void calib_leaf_init_fini(bool init)
+{
+ if (init)
+ xleaf_register_driver(XRT_SUBDEV_CALIB, &xrt_calib_driver, xrt_calib_endpoints);
+ else
+ xleaf_unregister_driver(XRT_SUBDEV_CALIB);
+}
--
2.18.4
next prev parent reply other threads:[~2021-02-18 7:44 UTC|newest]
Thread overview: 87+ 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 ` [PATCH V3 XRT Alveo 13/18] fpga: xrt: devctl " Lizhi Hou
2021-03-04 13:39 ` 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 ` Lizhi Hou [this message]
2021-02-21 20:21 ` [PATCH V3 XRT Alveo 16/18] fpga: xrt: DDR calibration " 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
2021-02-18 19:50 ` 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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