[AMD Official Use Only - General]
-----Original Message-----
From: Zhang, Yifan <Yifan1.Zhang@xxxxxxx>
Sent: Wednesday, September 20, 2023 4:48 PM
To: Sharma, Shashank <Shashank.Sharma@xxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>; Yadav, Arvind <Arvind.Yadav@xxxxxxx>; Sharma, Shashank <Shashank.Sharma@xxxxxxx>
Subject: RE: [PATCH v6 3/9] drm/amdgpu: add new IOCTL for usermode queue
[AMD Official Use Only - General]
-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Shashank Sharma
Sent: Saturday, September 9, 2023 12:05 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>; Yadav, Arvind <Arvind.Yadav@xxxxxxx>; Sharma, Shashank <Shashank.Sharma@xxxxxxx>
Subject: [PATCH v6 3/9] drm/amdgpu: add new IOCTL for usermode queue
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)
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 | 116 ++++++++++++++++++
.../gpu/drm/amd/include/amdgpu_userqueue.h | 2 +
3 files changed, 119 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 2a89e303c3db..214a66b33dfa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2830,6 +2830,7 @@ 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..44769423ba30 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -23,6 +23,122 @@
*/
#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;
+ 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 = uq_mgr->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;
+ 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 && args->in.ip_type != AMDGPU_HW_IP_DMA) {
+ 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 = uq_mgr->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");
+ goto unlock;
Should kfree(queue) in this path to avoid memory leak
+ }
+
+ 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);
+ r = -ENOMEM;
+ goto unlock;
Should kfree(queue) in this path to avoid memory leak
+ }
+ args->out.queue_id = qid;
+
Should add
free_queue:
kfree(queue) ;
to avoid memory leak
That's correct, looks like it got removed when I moved the code shift to accommodate the cleanup patch.
Thank you for pointing that.
- Shashank
+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;
+
+ 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);
+ 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 79ffa131a514..55ed6512a565 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -55,6 +55,8 @@ struct amdgpu_userq_mgr {
const struct amdgpu_userq_funcs *userq_funcs[AMDGPU_HW_IP_NUM]; };
+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);
--
2.42.0
