Am 24.04.23 um 19:38 schrieb Shashank Sharma:
This patch adds:
- A new IOCTL function to create and destroy
- A new structure to keep all the user queue data in one place.
- A function to generate unique index for the queue.
V1: Worked on review comments from RFC patch series:
- Alex: Keep a list of queues, instead of single queue per process.
- Christian: Use the queue manager instead of global ptrs,
Don't keep the queue structure in amdgpu_ctx
V2: Worked on review comments:
- Christian:
- Formatting of text
- There is no need for queuing of userqueues, with idr in place
- Alex:
- Remove use_doorbell, its unnecessary
- Reuse amdgpu_mqd_props for saving mqd fields
- Code formatting and re-arrangement
V3:
- Integration with doorbell manager
V4:
- Accommodate MQD union related changes in UAPI (Alex)
- Do not set the queue size twice (Bas)
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/amdgpu_drv.c | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 126 ++++++++++++++++++
.../gpu/drm/amd/include/amdgpu_userqueue.h | 2 +
3 files changed, 129 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 2d6bcfd727c8..229976a2d0e7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2749,6 +2749,7 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_VA, amdgpu_gem_va_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_OP, amdgpu_gem_op_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_USERPTR, amdgpu_gem_userptr_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(AMDGPU_USERQ, amdgpu_userq_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
};
static const struct drm_driver amdgpu_kms_driver = {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
index effc0c7c02cf..333f31efbe7b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -23,6 +23,132 @@
*/
#include "amdgpu.h"
+#include "amdgpu_vm.h"
+#include "amdgpu_userqueue.h"
+
+static inline int
+amdgpu_userqueue_index(struct amdgpu_userq_mgr *uq_mgr, struct amdgpu_usermode_queue *queue)
Maybe call that handle instead of index. And I don't think you actually
need those wrapper functions, see below.
+{
+ return idr_alloc(&uq_mgr->userq_idr, queue, 1, AMDGPU_MAX_USERQ, GFP_KERNEL);
+}
+
+static inline void
+amdgpu_userqueue_free_index(struct amdgpu_userq_mgr *uq_mgr, int queue_id)
+{
+ idr_remove(&uq_mgr->userq_idr, queue_id);
+}
+
+static struct amdgpu_usermode_queue *
+amdgpu_userqueue_find(struct amdgpu_userq_mgr *uq_mgr, int qid)
+{
+ return idr_find(&uq_mgr->userq_idr, qid);
+}
+
+static int amdgpu_userqueue_create_gfx(struct drm_file *filp, union drm_amdgpu_userq *args)
+{
+ struct amdgpu_usermode_queue *queue;
+ struct amdgpu_fpriv *fpriv = filp->driver_priv;
+ struct amdgpu_userq_mgr *uq_mgr = &fpriv->userq_mgr;
+ struct drm_amdgpu_userq_mqd_gfx *mqd_in = &args->in.mqd.gfx;
+ int r;
+
+ /* Do we support usermode queues on this GFX IP ? */
+ if (!uq_mgr->userq_funcs[AMDGPU_HW_IP_GFX]) {
+ DRM_ERROR("Usermode queue is not supported for this GFX IP\n");
+ return -EINVAL;
+ }
+
+ queue = kzalloc(sizeof(struct amdgpu_usermode_queue), GFP_KERNEL);
+ if (!queue) {
+ DRM_ERROR("Failed to allocate memory for queue\n");
+ return -ENOMEM;
+ }
+
+ mutex_lock(&uq_mgr->userq_mutex);
+ queue->userq_prop.wptr_gpu_addr = mqd_in->wptr_va;
+ queue->userq_prop.rptr_gpu_addr = mqd_in->rptr_va;
+ queue->userq_prop.queue_size = mqd_in->queue_size;
+ queue->userq_prop.hqd_base_gpu_addr = mqd_in->queue_va;
+
+ queue->doorbell_handle = mqd_in->doorbell_handle;
+ queue->queue_type = AMDGPU_HW_IP_GFX;
+ queue->flags = mqd_in->flags;
+ queue->vm = &fpriv->vm;
+ queue->queue_id = amdgpu_userqueue_index(uq_mgr, queue);
It is usually good practice to *not* store those handles inside the
object they refer to, background is that this always creates a circle
reference (handle->object, object->handle).
Additional to that I would move registering the userspace handle out of
this function.
+ if (queue->queue_id < 0) {
+ DRM_ERROR("Failed to allocate a queue id\n");
+ r = queue->queue_id;
+ goto free_queue;
+ }
+
+ args->out.queue_id = queue->queue_id;
+ args->out.flags = 0;
+ mutex_unlock(&uq_mgr->userq_mutex);
+ return 0;
+
+free_queue:
+ mutex_unlock(&uq_mgr->userq_mutex);
+ kfree(queue);
+ return r;
+}
+
+static int amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq *args)
+{
+ u32 ip_type = args->in.ip_type;
+
+ switch (ip_type) {
+ case AMDGPU_HW_IP_GFX:
+ return amdgpu_userqueue_create_gfx(filp, args);
+ default:
+ DRM_ERROR("Usermode queue is not supported for this IP (%u)\n", ip_type);
+ }
Instead insert the idr_alloc() or more generally handle alloc here.
Christian.
+
+ return -EINVAL;
+}
+
+static void amdgpu_userqueue_destroy(struct drm_file *filp, int queue_id)
+{
+ struct amdgpu_fpriv *fpriv = filp->driver_priv;
+ struct amdgpu_userq_mgr *uq_mgr = &fpriv->userq_mgr;
+ struct amdgpu_usermode_queue *queue;
+
+ queue = amdgpu_userqueue_find(uq_mgr, queue_id);
+ if (!queue) {
+ DRM_DEBUG_DRIVER("Invalid queue id to destroy\n");
+ return;
+ }
+
+ mutex_lock(&uq_mgr->userq_mutex);
+ amdgpu_userqueue_free_index(uq_mgr, queue->queue_id);
+ mutex_unlock(&uq_mgr->userq_mutex);
+ kfree(queue);
+}
+
+int amdgpu_userq_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp)
+{
+ union drm_amdgpu_userq *args = data;
+ int r = 0;
+
+ switch (args->in.op) {
+ case AMDGPU_USERQ_OP_CREATE:
+ r = amdgpu_userqueue_create(filp, args);
+ if (r)
+ DRM_ERROR("Failed to create usermode queue\n");
+ break;
+
+ case AMDGPU_USERQ_OP_FREE:
+ amdgpu_userqueue_destroy(filp, args->in.queue_id);
+ break;
+
+ default:
+ DRM_ERROR("Invalid user queue op specified: %d\n", args->in.op);
+ return -EINVAL;
+ }
+
+ return r;
+}
+
int amdgpu_userq_mgr_init(struct amdgpu_userq_mgr *userq_mgr, struct amdgpu_device *adev)
{
diff --git a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
index 6fe5d8d73f37..8d8f6b3bcda5 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -43,6 +43,8 @@ struct amdgpu_userq_funcs {
void (*mqd_destroy)(struct amdgpu_userq_mgr *uq_mgr, struct amdgpu_usermode_queue *uq);
};
+int amdgpu_userq_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
+
int amdgpu_userq_mgr_init(struct amdgpu_userq_mgr *userq_mgr, struct amdgpu_device *adev);
void amdgpu_userq_mgr_fini(struct amdgpu_userq_mgr *userq_mgr);
