From 3b60b70dbec9bb2450ecf012a7b8b6e5dce7168d Mon Sep 17 00:00:00 2001
From: James Zhu <James.Zhu@amd.com>
Date: Tue, 25 Apr 2023 17:00:50 -0400
Subject: drm/amdxcp: add platform device driver for amdxcp
Add platform device driver for amdxcp to support
amdgpu spatial partition.
-v2: fix build warning
Signed-off-by: James Zhu <James.Zhu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c | 110 ++++++++++++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c
(limited to 'drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c')
diff --git a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c
new file mode 100644
index 000000000000..353597fc908d
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_drv.h>
+
+#include "amdgpu_xcp_drv.h"
+
+#define MAX_XCP_PLATFORM_DEVICE 64
+
+struct xcp_device {
+ struct drm_device drm;
+ struct platform_device *pdev;
+};
+
+static const struct drm_driver amdgpu_xcp_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_RENDER,
+ .name = "amdgpu_xcp_drv",
+ .major = 1,
+ .minor = 0,
+};
+
+static int pdev_num;
+static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE];
+
+int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev)
+{
+ struct platform_device *pdev;
+ struct xcp_device *pxcp_dev;
+ int ret;
+
+ if (pdev_num >= MAX_XCP_PLATFORM_DEVICE)
+ return -ENODEV;
+
+ pdev = platform_device_register_simple("amdgpu_xcp", pdev_num, NULL, 0);
+ if (IS_ERR(pdev))
+ return PTR_ERR(pdev);
+
+ if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
+ ret = -ENOMEM;
+ goto out_unregister;
+ }
+
+ pxcp_dev = devm_drm_dev_alloc(&pdev->dev, &amdgpu_xcp_driver, struct xcp_device, drm);
+ if (IS_ERR(pxcp_dev)) {
+ ret = PTR_ERR(pxcp_dev);
+ goto out_devres;
+ }
+
+ xcp_dev[pdev_num] = pxcp_dev;
+ xcp_dev[pdev_num]->pdev = pdev;
+ *ddev = &pxcp_dev->drm;
+ pdev_num++;
+
+ return 0;
+
+out_devres:
+ devres_release_group(&pdev->dev, NULL);
+out_unregister:
+ platform_device_unregister(pdev);
+
+ return ret;
+}
+EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc);
+
+void amdgpu_xcp_drv_release(void)
+{
+ for (--pdev_num; pdev_num >= 0; --pdev_num) {
+ devres_release_group(&xcp_dev[pdev_num]->pdev->dev, NULL);
+ platform_device_unregister(xcp_dev[pdev_num]->pdev);
+ xcp_dev[pdev_num]->pdev = NULL;
+ xcp_dev[pdev_num] = NULL;
+ }
+ pdev_num = 0;
+}
+EXPORT_SYMBOL(amdgpu_xcp_drv_release);
+
+static void __exit amdgpu_xcp_drv_exit(void)
+{
+ amdgpu_xcp_drv_release();
+}
+
+module_exit(amdgpu_xcp_drv_exit);
+
+MODULE_AUTHOR("AMD linux driver team");
+MODULE_DESCRIPTION("AMD XCP PLATFORM DEVICES");
+MODULE_LICENSE("GPL and additional rights");
--
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