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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/cdx/controller/cdx_controller.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/cdx/controller/cdx_controller.c')
-rw-r--r--drivers/cdx/controller/cdx_controller.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/cdx/controller/cdx_controller.c b/drivers/cdx/controller/cdx_controller.c
new file mode 100644
index 0000000000..bb4ae7970e
--- /dev/null
+++ b/drivers/cdx/controller/cdx_controller.c
@@ -0,0 +1,231 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CDX host controller driver for AMD versal-net platform.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/cdx/cdx_bus.h>
+
+#include "cdx_controller.h"
+#include "../cdx.h"
+#include "mcdi_functions.h"
+#include "mcdi.h"
+
+static unsigned int cdx_mcdi_rpc_timeout(struct cdx_mcdi *cdx, unsigned int cmd)
+{
+ return MCDI_RPC_TIMEOUT;
+}
+
+static void cdx_mcdi_request(struct cdx_mcdi *cdx,
+ const struct cdx_dword *hdr, size_t hdr_len,
+ const struct cdx_dword *sdu, size_t sdu_len)
+{
+ if (cdx_rpmsg_send(cdx, hdr, hdr_len, sdu, sdu_len))
+ dev_err(&cdx->rpdev->dev, "Failed to send rpmsg data\n");
+}
+
+static const struct cdx_mcdi_ops mcdi_ops = {
+ .mcdi_rpc_timeout = cdx_mcdi_rpc_timeout,
+ .mcdi_request = cdx_mcdi_request,
+};
+
+void cdx_rpmsg_post_probe(struct cdx_controller *cdx)
+{
+ /* Register CDX controller with CDX bus driver */
+ if (cdx_register_controller(cdx))
+ dev_err(cdx->dev, "Failed to register CDX controller\n");
+}
+
+void cdx_rpmsg_pre_remove(struct cdx_controller *cdx)
+{
+ cdx_unregister_controller(cdx);
+ cdx_mcdi_wait_for_quiescence(cdx->priv, MCDI_RPC_TIMEOUT);
+}
+
+static int cdx_configure_device(struct cdx_controller *cdx,
+ u8 bus_num, u8 dev_num,
+ struct cdx_device_config *dev_config)
+{
+ int ret = 0;
+
+ switch (dev_config->type) {
+ case CDX_DEV_RESET_CONF:
+ ret = cdx_mcdi_reset_device(cdx->priv, bus_num, dev_num);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int cdx_scan_devices(struct cdx_controller *cdx)
+{
+ struct cdx_mcdi *cdx_mcdi = cdx->priv;
+ u8 bus_num, dev_num, num_cdx_bus;
+ int ret;
+
+ /* MCDI FW Read: Fetch the number of CDX buses on this controller */
+ ret = cdx_mcdi_get_num_buses(cdx_mcdi);
+ if (ret < 0) {
+ dev_err(cdx->dev,
+ "Get number of CDX buses failed: %d\n", ret);
+ return ret;
+ }
+ num_cdx_bus = (u8)ret;
+
+ for (bus_num = 0; bus_num < num_cdx_bus; bus_num++) {
+ u8 num_cdx_dev;
+
+ /* MCDI FW Read: Fetch the number of devices present */
+ ret = cdx_mcdi_get_num_devs(cdx_mcdi, bus_num);
+ if (ret < 0) {
+ dev_err(cdx->dev,
+ "Get devices on CDX bus %d failed: %d\n", bus_num, ret);
+ continue;
+ }
+ num_cdx_dev = (u8)ret;
+
+ for (dev_num = 0; dev_num < num_cdx_dev; dev_num++) {
+ struct cdx_dev_params dev_params;
+
+ /* MCDI FW: Get the device config */
+ ret = cdx_mcdi_get_dev_config(cdx_mcdi, bus_num,
+ dev_num, &dev_params);
+ if (ret) {
+ dev_err(cdx->dev,
+ "CDX device config get failed for %d(bus):%d(dev), %d\n",
+ bus_num, dev_num, ret);
+ continue;
+ }
+ dev_params.cdx = cdx;
+
+ /* Add the device to the cdx bus */
+ ret = cdx_device_add(&dev_params);
+ if (ret) {
+ dev_err(cdx->dev, "registering cdx dev: %d failed: %d\n",
+ dev_num, ret);
+ continue;
+ }
+
+ dev_dbg(cdx->dev, "CDX dev: %d on cdx bus: %d created\n",
+ dev_num, bus_num);
+ }
+ }
+
+ return 0;
+}
+
+static struct cdx_ops cdx_ops = {
+ .scan = cdx_scan_devices,
+ .dev_configure = cdx_configure_device,
+};
+
+static int xlnx_cdx_probe(struct platform_device *pdev)
+{
+ struct cdx_controller *cdx;
+ struct cdx_mcdi *cdx_mcdi;
+ int ret;
+
+ cdx_mcdi = kzalloc(sizeof(*cdx_mcdi), GFP_KERNEL);
+ if (!cdx_mcdi)
+ return -ENOMEM;
+
+ /* Store the MCDI ops */
+ cdx_mcdi->mcdi_ops = &mcdi_ops;
+ /* MCDI FW: Initialize the FW path */
+ ret = cdx_mcdi_init(cdx_mcdi);
+ if (ret) {
+ dev_err_probe(&pdev->dev, ret, "MCDI Initialization failed\n");
+ goto mcdi_init_fail;
+ }
+
+ cdx = kzalloc(sizeof(*cdx), GFP_KERNEL);
+ if (!cdx) {
+ ret = -ENOMEM;
+ goto cdx_alloc_fail;
+ }
+ platform_set_drvdata(pdev, cdx);
+
+ cdx->dev = &pdev->dev;
+ cdx->priv = cdx_mcdi;
+ cdx->ops = &cdx_ops;
+
+ ret = cdx_setup_rpmsg(pdev);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to register CDX RPMsg transport\n");
+ goto cdx_rpmsg_fail;
+ }
+
+ dev_info(&pdev->dev, "Successfully registered CDX controller with RPMsg as transport\n");
+ return 0;
+
+cdx_rpmsg_fail:
+ kfree(cdx);
+cdx_alloc_fail:
+ cdx_mcdi_finish(cdx_mcdi);
+mcdi_init_fail:
+ kfree(cdx_mcdi);
+
+ return ret;
+}
+
+static int xlnx_cdx_remove(struct platform_device *pdev)
+{
+ struct cdx_controller *cdx = platform_get_drvdata(pdev);
+ struct cdx_mcdi *cdx_mcdi = cdx->priv;
+
+ cdx_destroy_rpmsg(pdev);
+
+ kfree(cdx);
+
+ cdx_mcdi_finish(cdx_mcdi);
+ kfree(cdx_mcdi);
+
+ return 0;
+}
+
+static const struct of_device_id cdx_match_table[] = {
+ {.compatible = "xlnx,versal-net-cdx",},
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, cdx_match_table);
+
+static struct platform_driver cdx_pdriver = {
+ .driver = {
+ .name = "cdx-controller",
+ .pm = NULL,
+ .of_match_table = cdx_match_table,
+ },
+ .probe = xlnx_cdx_probe,
+ .remove = xlnx_cdx_remove,
+};
+
+static int __init cdx_controller_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&cdx_pdriver);
+ if (ret)
+ pr_err("platform_driver_register() failed: %d\n", ret);
+
+ return ret;
+}
+
+static void __exit cdx_controller_exit(void)
+{
+ platform_driver_unregister(&cdx_pdriver);
+}
+
+module_init(cdx_controller_init);
+module_exit(cdx_controller_exit);
+
+MODULE_AUTHOR("AMD Inc.");
+MODULE_DESCRIPTION("CDX controller for AMD devices");
+MODULE_LICENSE("GPL");