drm/amdgpu: create MES-V11 usermode queue for GFX

A Memory queue descriptor (MQD) of a userqueue defines it in
the hw's context. As MQD format can vary between different
graphics IPs, we need gfx GEN specific handlers to create MQDs.

This patch:
- Adds a new file which will be used for MES based userqueue
  functions targeting GFX and SDMA IP.
- Introduces MQD handler functions for the usermode queues.

V1: Worked on review comments from Alex:
    - Make MQD functions GEN and IP specific

V2: Worked on review comments from Alex:
    - Reuse the existing adev->mqd[ip] for MQD creation
    - Formatting and arrangement of code

V3:
    - Integration with doorbell manager

V4: Review comments addressed:
    - Do not create a new file for userq, reuse gfx_v11_0.c (Alex)
    - Align name of structure members (Luben)
    - Don't break up the Cc tag list and the Sob tag list in commit
      message (Luben)
V5:
   - No need to reserve the bo for MQD (Christian).
   - Some more changes to support IP specific MQD creation.

V6:
   - Add a comment reminding us to replace the amdgpu_bo_create_kernel()
     calls while creating MQD object to amdgpu_bo_create() once eviction
     fences are ready (Christian).

V7:
   - Re-arrange userqueue functions in adev instead of uq_mgr (Alex)
   - Use memdup_user instead of copy_from_user (Christian)

V9:
   - Moved userqueue code from gfx_v11_0.c to new file mes_v11_0.c so
     that it can be reused for SDMA userqueues as well (Shashank, Alex)

V10: Addressed review comments from Alex
   - Making this patch independent of IP engine(GFX/SDMA/Compute) and
     specific to MES V11 only, using the generic MQD structure.
   - Splitting a spearate patch to enabling GFX support from here.
   - Verify mqd va address to be non-NULL.
   - Add a separate header file.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Arvind Yadav <arvind.yadav@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -174,7 +174,8 @@ amdgpu-y += \
 amdgpu-y += \
 	amdgpu_mes.o \
 	mes_v11_0.o \
-	mes_v12_0.o
+	mes_v12_0.o \
+	mes_v11_0_userqueue.o
 
 # add UVD block
 amdgpu-y += \

drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c

@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2024 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 "amdgpu.h"
+#include "amdgpu_gfx.h"
+#include "v11_structs.h"
+#include "mes_v11_0.h"
+#include "mes_v11_0_userqueue.h"
+
+static int mes_v11_0_userq_mqd_create(struct amdgpu_userq_mgr *uq_mgr,
+				      struct drm_amdgpu_userq_in *args_in,
+				      struct amdgpu_usermode_queue *queue)
+{
+	struct amdgpu_device *adev = uq_mgr->adev;
+	struct amdgpu_mqd *mqd_hw_default = &adev->mqds[queue->queue_type];
+	struct drm_amdgpu_userq_in *mqd_user = args_in;
+	struct amdgpu_mqd_prop *userq_props;
+	int r;
+
+	/* Structure to initialize MQD for userqueue using generic MQD init function */
+	userq_props = kzalloc(sizeof(struct amdgpu_mqd_prop), GFP_KERNEL);
+	if (!userq_props) {
+		DRM_ERROR("Failed to allocate memory for userq_props\n");
+		return -ENOMEM;
+	}
+
+	if (!mqd_user->wptr_va || !mqd_user->rptr_va ||
+	    !mqd_user->queue_va || mqd_user->queue_size == 0) {
+		DRM_ERROR("Invalid MQD parameters for userqueue\n");
+		r = -EINVAL;
+		goto free_props;
+	}
+
+	r = amdgpu_userqueue_create_object(uq_mgr, &queue->mqd, mqd_hw_default->mqd_size);
+	if (r) {
+		DRM_ERROR("Failed to create MQD object for userqueue\n");
+		goto free_props;
+	}
+
+	/* Initialize the MQD BO with user given values */
+	userq_props->wptr_gpu_addr = mqd_user->wptr_va;
+	userq_props->rptr_gpu_addr = mqd_user->rptr_va;
+	userq_props->queue_size = mqd_user->queue_size;
+	userq_props->hqd_base_gpu_addr = mqd_user->queue_va;
+	userq_props->mqd_gpu_addr = queue->mqd.gpu_addr;
+	userq_props->use_doorbell = true;
+
+	queue->userq_prop = userq_props;
+
+	r = mqd_hw_default->init_mqd(adev, (void *)queue->mqd.cpu_ptr, userq_props);
+	if (r) {
+		DRM_ERROR("Failed to initialize MQD for userqueue\n");
+		goto free_mqd;
+	}
+
+	return 0;
+
+free_mqd:
+	amdgpu_userqueue_destroy_object(uq_mgr, &queue->mqd);
+
+free_props:
+	kfree(userq_props);
+
+	return r;
+}
+
+static void
+mes_v11_0_userq_mqd_destroy(struct amdgpu_userq_mgr *uq_mgr,
+			    struct amdgpu_usermode_queue *queue)
+{
+	kfree(queue->userq_prop);
+	amdgpu_userqueue_destroy_object(uq_mgr, &queue->mqd);
+}
+
+const struct amdgpu_userq_funcs userq_mes_v11_0_funcs = {
+	.mqd_create = mes_v11_0_userq_mqd_create,
+	.mqd_destroy = mes_v11_0_userq_mqd_destroy,
+};

drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright 2024 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.
+ *
+ */
+
+#ifndef MES_V11_0_USERQ_H
+#define MES_V11_0_USERQ_H
+#include "amdgpu_userqueue.h"
+
+extern const struct amdgpu_userq_funcs userq_mes_v11_0_funcs;
+#endif