Am 26.04.24 um 15:47 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)
V5:
- Remove wrapper functions for queue indexing (Christian)
- Do not save the queue id/idr in queue itself (Christian)
- Move the idr allocation in the IP independent generic space
(Christian)
V6:
- Check the validity of input IP type (Christian)
V7:
- Move uq_func from uq_mgr to adev (Alex)
- Add missing free(queue) for error cases (Yifan)
V9:
- Rebase
Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: Christian Koenig <christian.koe...@amd.com>
Signed-off-by: Shashank Sharma <shashank.sha...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 121 ++++++++++++++++++
.../gpu/drm/amd/include/amdgpu_userqueue.h | 2 +
3 files changed, 124 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 374970984a61..acee1c279abb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2916,6 +2916,7 @@ 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..df97b856f891 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -23,6 +23,127 @@
*/
#include "amdgpu.h"
+#include "amdgpu_vm.h"
+#include "amdgpu_userqueue.h"
+
+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_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_device *adev = uq_mgr->adev;
+ const struct amdgpu_userq_funcs *uq_funcs;
+ struct amdgpu_usermode_queue *queue;
+
+ mutex_lock(&uq_mgr->userq_mutex);
+
+ queue = amdgpu_userqueue_find(uq_mgr, queue_id);
+ if (!queue) {
+ DRM_DEBUG_DRIVER("Invalid queue id to destroy\n");
+ mutex_unlock(&uq_mgr->userq_mutex);
+ return -EINVAL;
+ }
+
+ uq_funcs = adev->userq_funcs[queue->queue_type];
+ uq_funcs->mqd_destroy(uq_mgr, queue);
+ idr_remove(&uq_mgr->userq_idr, queue_id);
+ kfree(queue);
+
+ mutex_unlock(&uq_mgr->userq_mutex);
+ return 0;
+}
+
+static int
+amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq *args)
+{
+ struct amdgpu_fpriv *fpriv = filp->driver_priv;
+ struct amdgpu_userq_mgr *uq_mgr = &fpriv->userq_mgr;
+ struct amdgpu_device *adev = uq_mgr->adev;
+ const struct amdgpu_userq_funcs *uq_funcs;
+ struct amdgpu_usermode_queue *queue;
+ int qid, r = 0;
+
+ /* Usermode queues are only supported for GFX/SDMA engines as of now */
+ if (args->in.ip_type != AMDGPU_HW_IP_GFX) {
+ DRM_ERROR("Usermode queue doesn't support IP type %u\n",
args->in.ip_type);
+ return -EINVAL;
+ }
+
+ mutex_lock(&uq_mgr->userq_mutex);
+
+ uq_funcs = adev->userq_funcs[args->in.ip_type];
+ if (!uq_funcs) {
+ DRM_ERROR("Usermode queue is not supported for this IP (%u)\n",
args->in.ip_type);
+ r = -EINVAL;
+ goto unlock;
+ }
+
+ queue = kzalloc(sizeof(struct amdgpu_usermode_queue), GFP_KERNEL);
+ if (!queue) {
+ DRM_ERROR("Failed to allocate memory for queue\n");
+ r = -ENOMEM;
+ goto unlock;
+ }
+ queue->doorbell_handle = args->in.doorbell_handle;
+ queue->doorbell_index = args->in.doorbell_offset;
+ queue->queue_type = args->in.ip_type;
+ queue->flags = args->in.flags;
+ queue->vm = &fpriv->vm;
+
+ r = uq_funcs->mqd_create(uq_mgr, &args->in, queue);
+ if (r) {
+ DRM_ERROR("Failed to create Queue\n");
+ kfree(queue);
+ goto unlock;
+ }
+
+ qid = idr_alloc(&uq_mgr->userq_idr, queue, 1, AMDGPU_MAX_USERQ_COUNT,
GFP_KERNEL);
+ if (qid < 0) {
+ DRM_ERROR("Failed to allocate a queue id\n");
+ uq_funcs->mqd_destroy(uq_mgr, queue);
+ kfree(queue);
+ r = -ENOMEM;
+ goto unlock;
+ }
+ args->out.queue_id = qid;
+
+unlock:
+ mutex_unlock(&uq_mgr->userq_mutex);
+ return r;
+}
+
+int amdgpu_userq_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp)
+{
+ union drm_amdgpu_userq *args = data;
+ int r = 0;
Don't initialize local variables if it isn't necessary.
We now have automated checkers complaining about that. If some older
compiler complains then rather change the code below to have a goto
error or something like that.
+
+ 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:
+ r = amdgpu_userqueue_destroy(filp, args->in.queue_id);
+ if (r)
+ DRM_ERROR("Failed to destroy usermode queue\n");
+ break;
+
+ default:
+ DRM_ERROR("Invalid user queue op specified: %d\n", args->in.op);
That could spam the logs if we ever decide to extend the IOCTL, rather
make the message debug severity.
With those two handled the patch is Reviewed-by: Christian König
<christian.koe...@amd.com>.
Regards,
Christian.
+ 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 93ebe4b61682..b739274c72e1 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -54,6 +54,8 @@ struct amdgpu_userq_mgr {
struct amdgpu_device *adev;
};
+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);
