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drm/virtio: rework resource creation workflow. 

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@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190318113332.10900-6-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2019-03-18 12:33:32 +01:00
parent fd4d6a4277
commit 530b28426a
6 changed files with 83 additions and 91 deletions
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18
drivers/gpu/drm/virtio/virtgpu_drv.h
View File

@ -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,

4
drivers/gpu/drm/virtio/virtgpu_fence.c
View File

@ -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,
};

19
drivers/gpu/drm/virtio/virtgpu_gem.c
View File

@ -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, &params, &gobj,
&args->handle);
if (ret)
goto fail;
obj = gem_to_virtio_gpu_obj(gobj);
virtio_gpu_cmd_create_resource(vgdev, obj, &params);
/* 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;

72
drivers/gpu/drm/virtio/virtgpu_ioctl.c
View File

@ -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, &params);
fence = virtio_gpu_fence_alloc(vgdev);
if (!fence)
return -ENOMEM;
qobj = virtio_gpu_alloc_object(dev, &params, 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, &params);
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, &params);
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,

47
drivers/gpu/drm/virtio/virtgpu_object.c
View File

@ -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;
virtio_gpu_init_ttm_placement(bo);
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;
}

14
drivers/gpu/drm/virtio/virtgpu_vq.c
View File

@ -376,7 +376,8 @@ retry:
/* 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;