[PATCH v3 5/5] drm/virtio: rework resource creation workflow.
Gerd Hoffmann
kraxel at redhat.com
Mon Mar 18 11:33:32 UTC 2019
This patch moves the virtio_gpu_cmd_create_resource() call (which
notifies the host about the new resource created) into the
virtio_gpu_object_create() function. That way we can call
virtio_gpu_cmd_create_resource() before ttm_bo_init(), so the host
already knows about the object when ttm initializes the object and calls
our driver callbacks.
Specifically the object is already created when the
virtio_gpu_ttm_tt_bind() callback invokes virtio_gpu_object_attach(),
so the extra virtio_gpu_object_attach() calls done after
virtio_gpu_object_create() are not needed any more.
The fence support for the create ioctl becomes a bit more tricky though.
The code moved into virtio_gpu_object_create() too. We first submit the
(fenced) virtio_gpu_cmd_create_resource() command, then initialize the
ttm object, and finally attach just created object to the fence for the
command in case it didn't finish yet.
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 18 +++++--
drivers/gpu/drm/virtio/virtgpu_fence.c | 4 +-
drivers/gpu/drm/virtio/virtgpu_gem.c | 19 ++-----
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 72 ++++---------------------
drivers/gpu/drm/virtio/virtgpu_object.c | 47 ++++++++++++++--
drivers/gpu/drm/virtio/virtgpu_vq.c | 14 ++---
6 files changed, 83 insertions(+), 91 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 9b01cb34a616..491dec0712b3 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -55,7 +55,9 @@ struct virtio_gpu_object_params {
uint32_t width;
uint32_t height;
unsigned long size;
+ bool dumb;
/* 3d */
+ bool virgl;
uint32_t target;
uint32_t bind;
uint32_t depth;
@@ -219,6 +221,9 @@ struct virtio_gpu_fpriv {
/* virtio_ioctl.c */
#define DRM_VIRTIO_NUM_IOCTLS 10
extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
+int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
+ struct list_head *head);
+void virtio_gpu_unref_list(struct list_head *head);
/* virtio_kms.c */
int virtio_gpu_init(struct drm_device *dev);
@@ -241,7 +246,8 @@ void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
struct drm_file *file);
struct virtio_gpu_object*
virtio_gpu_alloc_object(struct drm_device *dev,
- struct virtio_gpu_object_params *params);
+ struct virtio_gpu_object_params *params,
+ struct virtio_gpu_fence *fence);
int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
@@ -258,7 +264,8 @@ int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo,
- struct virtio_gpu_object_params *params);
+ struct virtio_gpu_object_params *params,
+ struct virtio_gpu_fence *fence);
void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
uint32_t resource_id);
void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
@@ -317,7 +324,8 @@ void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
void
virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo,
- struct virtio_gpu_object_params *params);
+ struct virtio_gpu_object_params *params,
+ struct virtio_gpu_fence *fence);
void virtio_gpu_ctrl_ack(struct virtqueue *vq);
void virtio_gpu_cursor_ack(struct virtqueue *vq);
void virtio_gpu_fence_ack(struct virtqueue *vq);
@@ -345,6 +353,7 @@ void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
/* virtio_gpu_fence.c */
+bool virtio_fence_signaled(struct dma_fence *f);
struct virtio_gpu_fence *virtio_gpu_fence_alloc(
struct virtio_gpu_device *vgdev);
int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
@@ -356,7 +365,8 @@ void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
/* virtio_gpu_object */
int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object_params *params,
- struct virtio_gpu_object **bo_ptr);
+ struct virtio_gpu_object **bo_ptr,
+ struct virtio_gpu_fence *fence);
void virtio_gpu_object_kunmap(struct virtio_gpu_object *bo);
int virtio_gpu_object_kmap(struct virtio_gpu_object *bo);
int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
diff --git a/drivers/gpu/drm/virtio/virtgpu_fence.c b/drivers/gpu/drm/virtio/virtgpu_fence.c
index 21bd4c4a32d1..87d1966192f4 100644
--- a/drivers/gpu/drm/virtio/virtgpu_fence.c
+++ b/drivers/gpu/drm/virtio/virtgpu_fence.c
@@ -36,7 +36,7 @@ static const char *virtio_get_timeline_name(struct dma_fence *f)
return "controlq";
}
-static bool virtio_signaled(struct dma_fence *f)
+bool virtio_fence_signaled(struct dma_fence *f)
{
struct virtio_gpu_fence *fence = to_virtio_fence(f);
@@ -62,7 +62,7 @@ static void virtio_timeline_value_str(struct dma_fence *f, char *str, int size)
static const struct dma_fence_ops virtio_fence_ops = {
.get_driver_name = virtio_get_driver_name,
.get_timeline_name = virtio_get_timeline_name,
- .signaled = virtio_signaled,
+ .signaled = virtio_fence_signaled,
.fence_value_str = virtio_fence_value_str,
.timeline_value_str = virtio_timeline_value_str,
};
diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
index ac15863643e7..1e49e08dd545 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -36,13 +36,14 @@ void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
struct virtio_gpu_object*
virtio_gpu_alloc_object(struct drm_device *dev,
- struct virtio_gpu_object_params *params)
+ struct virtio_gpu_object_params *params,
+ struct virtio_gpu_fence *fence)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_object *obj;
int ret;
- ret = virtio_gpu_object_create(vgdev, params, &obj);
+ ret = virtio_gpu_object_create(vgdev, params, &obj, fence);
if (ret)
return ERR_PTR(ret);
@@ -59,7 +60,7 @@ int virtio_gpu_gem_create(struct drm_file *file,
int ret;
u32 handle;
- obj = virtio_gpu_alloc_object(dev, params);
+ obj = virtio_gpu_alloc_object(dev, params, NULL);
if (IS_ERR(obj))
return PTR_ERR(obj);
@@ -82,9 +83,7 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
- struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_gem_object *gobj;
- struct virtio_gpu_object *obj;
struct virtio_gpu_object_params params = { 0 };
int ret;
uint32_t pitch;
@@ -100,20 +99,12 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
params.width = args->width;
params.height = args->height;
params.size = args->size;
+ params.dumb = true;
ret = virtio_gpu_gem_create(file_priv, dev, ¶ms, &gobj,
&args->handle);
if (ret)
goto fail;
- obj = gem_to_virtio_gpu_obj(gobj);
- virtio_gpu_cmd_create_resource(vgdev, obj, ¶ms);
-
- /* attach the object to the resource */
- ret = virtio_gpu_object_attach(vgdev, obj, NULL);
- if (ret)
- goto fail;
-
- obj->dumb = true;
args->pitch = pitch;
return ret;
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 143898b0d628..949a264985fc 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -54,8 +54,8 @@ static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
&virtio_gpu_map->offset);
}
-static int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
- struct list_head *head)
+int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
+ struct list_head *head)
{
struct ttm_operation_ctx ctx = { false, false };
struct ttm_validate_buffer *buf;
@@ -79,7 +79,7 @@ static int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
return 0;
}
-static void virtio_gpu_unref_list(struct list_head *head)
+void virtio_gpu_unref_list(struct list_head *head)
{
struct ttm_validate_buffer *buf;
struct ttm_buffer_object *bo;
@@ -275,14 +275,11 @@ static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_virtgpu_resource_create *rc = data;
+ struct virtio_gpu_fence *fence;
int ret;
struct virtio_gpu_object *qobj;
struct drm_gem_object *obj;
uint32_t handle = 0;
- struct list_head validate_list;
- struct ttm_validate_buffer mainbuf;
- struct virtio_gpu_fence *fence = NULL;
- struct ww_acquire_ctx ticket;
struct virtio_gpu_object_params params = { 0 };
if (vgdev->has_virgl_3d == false) {
@@ -298,14 +295,12 @@ static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
- INIT_LIST_HEAD(&validate_list);
- memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
-
params.format = rc->format;
params.width = rc->width;
params.height = rc->height;
params.size = rc->size;
if (vgdev->has_virgl_3d) {
+ params.virgl = true;
params.target = rc->target;
params.bind = rc->bind;
params.depth = rc->depth;
@@ -318,72 +313,25 @@ static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
if (params.size == 0)
params.size = PAGE_SIZE;
- qobj = virtio_gpu_alloc_object(dev, ¶ms);
+ fence = virtio_gpu_fence_alloc(vgdev);
+ if (!fence)
+ return -ENOMEM;
+ qobj = virtio_gpu_alloc_object(dev, ¶ms, fence);
+ dma_fence_put(&fence->f);
if (IS_ERR(qobj))
return PTR_ERR(qobj);
obj = &qobj->gem_base;
- if (!vgdev->has_virgl_3d) {
- virtio_gpu_cmd_create_resource(vgdev, qobj, ¶ms);
-
- ret = virtio_gpu_object_attach(vgdev, qobj, NULL);
- } else {
- /* use a gem reference since unref list undoes them */
- drm_gem_object_get(&qobj->gem_base);
- mainbuf.bo = &qobj->tbo;
- list_add(&mainbuf.head, &validate_list);
-
- ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
- if (ret) {
- DRM_DEBUG("failed to validate\n");
- goto fail_unref;
- }
-
- fence = virtio_gpu_fence_alloc(vgdev);
- if (!fence) {
- ret = -ENOMEM;
- goto fail_backoff;
- }
-
- virtio_gpu_cmd_resource_create_3d(vgdev, qobj, ¶ms);
- ret = virtio_gpu_object_attach(vgdev, qobj, fence);
- if (ret) {
- dma_fence_put(&fence->f);
- goto fail_backoff;
- }
- ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
- }
-
ret = drm_gem_handle_create(file_priv, obj, &handle);
if (ret) {
-
drm_gem_object_release(obj);
- if (vgdev->has_virgl_3d) {
- virtio_gpu_unref_list(&validate_list);
- dma_fence_put(&fence->f);
- }
return ret;
}
drm_gem_object_put_unlocked(obj);
rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */
rc->bo_handle = handle;
-
- if (vgdev->has_virgl_3d) {
- virtio_gpu_unref_list(&validate_list);
- dma_fence_put(&fence->f);
- }
return 0;
-fail_backoff:
- ttm_eu_backoff_reservation(&ticket, &validate_list);
-fail_unref:
- if (vgdev->has_virgl_3d) {
- virtio_gpu_unref_list(&validate_list);
- dma_fence_put(&fence->f);
- }
-//fail_obj:
-// drm_gem_object_handle_unreference_unlocked(obj);
- return ret;
}
static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index 538b93417f70..b2da31310d24 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -23,6 +23,8 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+#include <drm/ttm/ttm_execbuf_util.h>
+
#include "virtgpu_drv.h"
static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
@@ -92,7 +94,8 @@ static void virtio_gpu_init_ttm_placement(struct virtio_gpu_object *vgbo)
int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object_params *params,
- struct virtio_gpu_object **bo_ptr)
+ struct virtio_gpu_object **bo_ptr,
+ struct virtio_gpu_fence *fence)
{
struct virtio_gpu_object *bo;
size_t acc_size;
@@ -118,9 +121,15 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
kfree(bo);
return ret;
}
- bo->dumb = false;
+ bo->dumb = params->dumb;
+
+ if (params->virgl) {
+ virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, fence);
+ } else {
+ virtio_gpu_cmd_create_resource(vgdev, bo, params, fence);
+ }
+
virtio_gpu_init_ttm_placement(bo);
-
ret = ttm_bo_init(&vgdev->mman.bdev, &bo->tbo, params->size,
ttm_bo_type_device, &bo->placement, 0,
true, acc_size, NULL, NULL,
@@ -129,6 +138,38 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
if (ret != 0)
return ret;
+ if (fence) {
+ struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
+ struct list_head validate_list;
+ struct ttm_validate_buffer mainbuf;
+ struct ww_acquire_ctx ticket;
+ unsigned long irq_flags;
+ bool signaled;
+
+ INIT_LIST_HEAD(&validate_list);
+ memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
+
+ /* use a gem reference since unref list undoes them */
+ drm_gem_object_get(&bo->gem_base);
+ mainbuf.bo = &bo->tbo;
+ list_add(&mainbuf.head, &validate_list);
+
+ ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
+ if (ret == 0) {
+ spin_lock_irqsave(&drv->lock, irq_flags);
+ signaled = virtio_fence_signaled(&fence->f);
+ if (!signaled)
+ /* virtio create command still in flight */
+ ttm_eu_fence_buffer_objects(&ticket, &validate_list,
+ &fence->f);
+ spin_unlock_irqrestore(&drv->lock, irq_flags);
+ if (signaled)
+ /* virtio create command finished */
+ ttm_eu_backoff_reservation(&ticket, &validate_list);
+ }
+ virtio_gpu_unref_list(&validate_list);
+ }
+
*bo_ptr = bo;
return 0;
}
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index ca93ec6ca3c5..e62fe24b1a2e 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -376,7 +376,8 @@ static int virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,
/* create a basic resource */
void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo,
- struct virtio_gpu_object_params *params)
+ struct virtio_gpu_object_params *params,
+ struct virtio_gpu_fence *fence)
{
struct virtio_gpu_resource_create_2d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
@@ -390,7 +391,7 @@ void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
cmd_p->width = cpu_to_le32(params->width);
cmd_p->height = cpu_to_le32(params->height);
- virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
+ virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
bo->created = true;
}
@@ -826,7 +827,8 @@ void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
void
virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo,
- struct virtio_gpu_object_params *params)
+ struct virtio_gpu_object_params *params,
+ struct virtio_gpu_fence *fence)
{
struct virtio_gpu_resource_create_3d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
@@ -848,7 +850,7 @@ virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
cmd_p->nr_samples = cpu_to_le32(params->nr_samples);
cmd_p->flags = cpu_to_le32(params->flags);
- virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
+ virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
bo->created = true;
}
@@ -932,8 +934,8 @@ int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
struct scatterlist *sg;
int si, nents;
- if (!obj->created)
- return 0;
+ if (WARN_ON_ONCE(!obj->created))
+ return -EINVAL;
if (!obj->pages) {
int ret;
--
2.18.1
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