This patch adds skeleton code for usermode queue creation. It
typically contains:
- A new structure to keep all the user queue data in one place.
- An IOCTL function to create/free a usermode queue.
- A function to generate unique index for the queue.
- A global ptr in amdgpu_dev
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 6 +
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 187 ++++++++++++++++++
.../drm/amd/include/amdgpu_usermode_queue.h | 50 +++++
5 files changed, 246 insertions(+)
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
create mode 100644 drivers/gpu/drm/amd/include/amdgpu_usermode_queue.h
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 6ad39cf71bdd..e2a34ee57bfb 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -209,6 +209,8 @@ amdgpu-y += \
# add amdkfd interfaces
amdgpu-y += amdgpu_amdkfd.o
+# add usermode queue
+amdgpu-y += amdgpu_userqueue.o
ifneq ($(CONFIG_HSA_AMD),)
AMDKFD_PATH := ../amdkfd
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 8639a4f9c6e8..4b566fcfca18 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -749,6 +749,11 @@ struct amdgpu_mqd {
struct amdgpu_mqd_prop *p);
};
+struct amdgpu_userq_globals {
+ struct ida ida;
+ struct mutex userq_mutex;
+};
+
#define AMDGPU_RESET_MAGIC_NUM 64
#define AMDGPU_MAX_DF_PERFMONS 4
#define AMDGPU_PRODUCT_NAME_LEN 64
@@ -955,6 +960,7 @@ struct amdgpu_device {
bool enable_mes_kiq;
struct amdgpu_mes mes;
struct amdgpu_mqd mqds[AMDGPU_HW_IP_NUM];
+ struct amdgpu_userq_globals userq;
/* df */
struct amdgpu_df df;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
index 0fa0e56daf67..f7413859b14f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h
@@ -57,6 +57,7 @@ struct amdgpu_ctx {
unsigned long ras_counter_ce;
unsigned long ras_counter_ue;
uint32_t stable_pstate;
+ struct amdgpu_usermode_queue *userq;
};
struct amdgpu_ctx_mgr {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
new file mode 100644
index 000000000000..3b6e8f75495c
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -0,0 +1,187 @@
+/*
+ * 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_vm.h"
+#include "amdgpu_mes.h"
+#include "amdgpu_usermode_queue.h"
+#include "soc15_common.h"
+
+#define CHECK_ACCESS(a) (access_ok((const void __user *)a, sizeof(__u64)))
+
+static int
+amdgpu_userqueue_index(struct amdgpu_device *adev)
+{
+ int index;
+ struct amdgpu_userq_globals *uqg = &adev->userq;
+
+ index = ida_simple_get(&uqg->ida, 2, AMDGPU_MAX_USERQ, GFP_KERNEL);
+ return index;
+}
+
+static void
+amdgpu_userqueue_remove_index(struct amdgpu_device *adev, struct amdgpu_usermode_queue *queue)
+{
+ struct amdgpu_userq_globals *uqg = &adev->userq;
+
+ ida_simple_remove(&uqg->ida, queue->queue_id);
+}
+
+static int
+amdgpu_userqueue_validate_input(struct amdgpu_device *adev, struct drm_amdgpu_userq_mqd *mqd_in)
+{
+ if (mqd_in->queue_va == 0 || mqd_in->doorbell_handle == 0 || mqd_in->doorbell_offset == 0) {
+ DRM_ERROR("Invalid queue object address\n");
+ return -EINVAL;
+ }
+
+ if (mqd_in->queue_size == 0 || mqd_in->rptr_va == 0 || mqd_in->wptr_va == 0) {
+ DRM_ERROR("Invalid queue object value\n");
+ return -EINVAL;
+ }
+
+ if (mqd_in->ip_type < AMDGPU_HW_IP_GFX || mqd_in->ip_type >= AMDGPU_HW_IP_NUM) {
+ DRM_ERROR("Invalid HW IP type 0x%x\n", mqd_in->ip_type);
+ return -EINVAL;
+ }
+
+ if (!CHECK_ACCESS(mqd_in->queue_va) || !CHECK_ACCESS(mqd_in->rptr_va) ||
+ !CHECK_ACCESS(mqd_in->wptr_va)) {
+ DRM_ERROR("Invalid mapping of queue ptrs, access error\n");
+ return -EINVAL;
+ }
+
+ DRM_DEBUG_DRIVER("Input parameters to create queue are valid\n");
+ return 0;
+}
+
+int amdgpu_userqueue_create(struct amdgpu_device *adev, struct drm_file *filp,
+ union drm_amdgpu_userq *args)
+{
+ int r, pasid;
+ struct amdgpu_usermode_queue *queue;
+ struct amdgpu_fpriv *fpriv = filp->driver_priv;
+ struct amdgpu_vm *vm = &fpriv->vm;
+ struct amdgpu_ctx *ctx = amdgpu_ctx_get(fpriv, args->in.ctx_id);
+ struct drm_amdgpu_userq_mqd *mqd_in = &args->in.mqd;
+
+ if (!ctx) {
+ DRM_ERROR("Invalid GPU context\n");
+ return -EINVAL;
+ }
+
+ if (vm->pasid < 0) {
+ DRM_WARN("No PASID info found\n");
+ pasid = 0;
+ }
+
+ mutex_lock(&adev->userq.userq_mutex);
+
+ queue = kzalloc(sizeof(struct amdgpu_usermode_queue), GFP_KERNEL);
+ if (!queue) {
+ DRM_ERROR("Failed to allocate memory for queue\n");
+ mutex_unlock(&adev->userq.userq_mutex);
+ return -ENOMEM;
+ }
+
+ r = amdgpu_userqueue_validate_input(adev, mqd_in);
+ if (r < 0) {
+ DRM_ERROR("Invalid input to create queue\n");
+ goto free_queue;
+ }
+
+ queue->vm = vm;
+ queue->pasid = pasid;
+ queue->wptr_gpu_addr = mqd_in->wptr_va;
+ queue->rptr_gpu_addr = mqd_in->rptr_va;
+ queue->queue_size = mqd_in->queue_size;
+ queue->queue_type = mqd_in->ip_type;
+ queue->paging = false;
+ queue->flags = mqd_in->flags;
+ queue->queue_id = amdgpu_userqueue_index(adev);
+
+ ctx->userq = queue;
