[PATCH v3 4/9] drm/amdgpu: create GFX-gen11 MQD for userqueue

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From: Shashank Sharma <contactshashanksharma@xxxxxxxxx>

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

This patch:
- Introduces MQD hander functions for the usermode queues.
- Adds new functions to create and destroy MQD for GFX-GEN-11-IP

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

Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>

Signed-off-by: Shashank Sharma <contactshashanksharma@xxxxxxxxx>
Signed-off-by: Arvind Yadav <arvind.yadav@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/Makefile           |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 21 +++++
 .../drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c | 84 +++++++++++++++++++
 .../gpu/drm/amd/include/amdgpu_userqueue.h    |  7 ++
 4 files changed, 113 insertions(+)
 create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 2d90ba618e5d..2cc7897de7e6 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -212,6 +212,7 @@ amdgpu-y += amdgpu_amdkfd.o
 
 # add usermode queue
 amdgpu-y += amdgpu_userqueue.o
+amdgpu-y += amdgpu_userqueue_gfx_v11.o
 
 ifneq ($(CONFIG_HSA_AMD),)
 AMDKFD_PATH := ../amdkfd
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
index 353f57c5a772..052c2c1e8aed 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -81,6 +81,12 @@ static int amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq
         goto free_queue;
     }
 
+    r = uq_mgr->userq_funcs[queue->queue_type]->mqd_create(uq_mgr, queue);
+    if (r) {
+        DRM_ERROR("Failed to create/map userqueue MQD\n");
+        goto free_queue;
+    }
+
     args->out.queue_id = queue->queue_id;
     args->out.flags = 0;
     mutex_unlock(&uq_mgr->userq_mutex);
@@ -105,6 +111,7 @@ static void amdgpu_userqueue_destroy(struct drm_file *filp, int queue_id)
     }
 
     mutex_lock(&uq_mgr->userq_mutex);
+    uq_mgr->userq_funcs[queue->queue_type]->mqd_destroy(uq_mgr, queue);
     amdgpu_userqueue_free_index(uq_mgr, queue->queue_id);
     mutex_unlock(&uq_mgr->userq_mutex);
     kfree(queue);
@@ -135,6 +142,19 @@ int amdgpu_userq_ioctl(struct drm_device *dev, void *data,
     return r;
 }
 
+extern const struct amdgpu_userq_funcs userq_gfx_v11_funcs;
+
+static void
+amdgpu_userqueue_setup_ip_funcs(struct amdgpu_userq_mgr *uq_mgr)
+{
+    int maj;
+    struct amdgpu_device *adev = uq_mgr->adev;
+    uint32_t version = adev->ip_versions[GC_HWIP][0];
+
+    maj = IP_VERSION_MAJ(version);
+    if (maj == 11)
+        uq_mgr->userq_funcs[AMDGPU_HW_IP_GFX] = &userq_gfx_v11_funcs;
+}
 
 int amdgpu_userq_mgr_init(struct amdgpu_userq_mgr *userq_mgr, struct amdgpu_device *adev)
 {
@@ -142,6 +162,7 @@ int amdgpu_userq_mgr_init(struct amdgpu_userq_mgr *userq_mgr, struct amdgpu_devi
     idr_init_base(&userq_mgr->userq_idr, 1);
     userq_mgr->adev = adev;
 
+    amdgpu_userqueue_setup_ip_funcs(userq_mgr);
     return 0;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c
new file mode 100644
index 000000000000..12e1a785b65a
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2022 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_userqueue.h"
+
+static int
+amdgpu_userq_gfx_v11_mqd_create(struct amdgpu_userq_mgr *uq_mgr, struct amdgpu_usermode_queue *queue)
+{
+    struct amdgpu_device *adev = uq_mgr->adev;
+    struct amdgpu_userq_ctx_space *mqd = &queue->mqd;
+    struct amdgpu_mqd *gfx_v11_mqd = &adev->mqds[queue->queue_type];
+    int size = gfx_v11_mqd->mqd_size;
+    int r;
+
+    r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
+                                AMDGPU_GEM_DOMAIN_GTT,
+                                &mqd->obj,
+                                &mqd->gpu_addr,
+                                &mqd->cpu_ptr);
+    if (r) {
+        DRM_ERROR("Failed to allocate bo for userqueue (%d)", r);
+        return r;
+    }
+
+    memset(mqd->cpu_ptr, 0, size);
+    r = amdgpu_bo_reserve(mqd->obj, false);
+    if (unlikely(r != 0)) {
+        DRM_ERROR("Failed to reserve mqd for userqueue (%d)", r);
+        goto free_mqd;
+    }
+
+    queue->userq_prop.use_doorbell = true;
+    queue->userq_prop.mqd_gpu_addr = mqd->gpu_addr;
+    r = gfx_v11_mqd->init_mqd(adev, (void *)mqd->cpu_ptr, &queue->userq_prop);
+    amdgpu_bo_unreserve(mqd->obj);
+    if (r) {
+        DRM_ERROR("Failed to init MQD for queue\n");
+        goto free_mqd;
+    }
+
+    DRM_DEBUG_DRIVER("MQD for queue %d created\n", queue->queue_id);
+    return 0;
+
+free_mqd:
+    amdgpu_bo_free_kernel(&mqd->obj,
+			   &mqd->gpu_addr,
+			   &mqd->cpu_ptr);
+   return r;
+}
+
+static void
+amdgpu_userq_gfx_v11_mqd_destroy(struct amdgpu_userq_mgr *uq_mgr, struct amdgpu_usermode_queue *queue)
+{
+    struct amdgpu_userq_ctx_space *mqd = &queue->mqd;
+
+    amdgpu_bo_free_kernel(&mqd->obj,
+			   &mqd->gpu_addr,
+			   &mqd->cpu_ptr);
+}
+
+const struct amdgpu_userq_funcs userq_gfx_v11_funcs = {
+    .mqd_create = amdgpu_userq_gfx_v11_mqd_create,
+    .mqd_destroy = amdgpu_userq_gfx_v11_mqd_destroy,
+};
diff --git a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
index 7625a862b1fc..2911c88d0fed 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -27,6 +27,12 @@
 #include "amdgpu.h"
 #define AMDGPU_MAX_USERQ 512
 
+struct amdgpu_userq_ctx_space {
+	struct amdgpu_bo *obj;
+	uint64_t gpu_addr;
+	void *cpu_ptr;
+};
+
 struct amdgpu_usermode_queue {
 	int queue_id;
 	int queue_type;
@@ -35,6 +41,7 @@ struct amdgpu_usermode_queue {
 	struct amdgpu_vm *vm;
 	struct amdgpu_userq_mgr *userq_mgr;
 	struct amdgpu_mqd_prop userq_prop;
+	struct amdgpu_userq_ctx_space mqd;
 };
 
 struct amdgpu_userq_funcs {
-- 
2.40.0




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