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WSL2-Linux-Kernel
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drm/virtio: move virtio_gpu_object_{attach, detach} calls. 

Drop the dummy ttm backend implementation, add a real one for
TTM_PL_FLAG_TT objects.  The bin/unbind callbacks will call
virtio_gpu_object_{attach,detach}, to update the object state
on the host side, instead of invoking those calls from the
move_notify() callback.

With that in place the move and move_notify callbacks are not
needed any more, so drop them.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190318113332.10900-2-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2019-03-18 12:33:28 +01:00
Родитель 6bbeae35b6
Коммит 42ca472603
1 изменённых файлов: 24 добавлений и 68 удалений
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92
drivers/gpu/drm/virtio/virtgpu_ttm.c
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@ -190,42 +190,45 @@ static void virtio_gpu_ttm_io_mem_free(struct ttm_bo_device *bdev,
*/
struct virtio_gpu_ttm_tt {
struct ttm_dma_tt ttm;
struct virtio_gpu_device *vgdev;
u64 offset;
struct virtio_gpu_object *obj;
};
static int virtio_gpu_ttm_backend_bind(struct ttm_tt *ttm,
struct ttm_mem_reg *bo_mem)
static int virtio_gpu_ttm_tt_bind(struct ttm_tt *ttm,
struct ttm_mem_reg *bo_mem)
{
struct virtio_gpu_ttm_tt *gtt = (void *)ttm;
struct virtio_gpu_ttm_tt *gtt =
container_of(ttm, struct virtio_gpu_ttm_tt, ttm.ttm);
struct virtio_gpu_device *vgdev =
virtio_gpu_get_vgdev(gtt->obj->tbo.bdev);
gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
if (!ttm->num_pages)
WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
ttm->num_pages, bo_mem, ttm);
/* Not implemented */
virtio_gpu_object_attach(vgdev, gtt->obj, NULL);
return 0;
}
static int virtio_gpu_ttm_backend_unbind(struct ttm_tt *ttm)
static int virtio_gpu_ttm_tt_unbind(struct ttm_tt *ttm)
{
/* Not implemented */
struct virtio_gpu_ttm_tt *gtt =
container_of(ttm, struct virtio_gpu_ttm_tt, ttm.ttm);
struct virtio_gpu_device *vgdev =
virtio_gpu_get_vgdev(gtt->obj->tbo.bdev);
virtio_gpu_object_detach(vgdev, gtt->obj);
return 0;
}
static void virtio_gpu_ttm_backend_destroy(struct ttm_tt *ttm)
static void virtio_gpu_ttm_tt_destroy(struct ttm_tt *ttm)
{
struct virtio_gpu_ttm_tt *gtt = (void *)ttm;
struct virtio_gpu_ttm_tt *gtt =
container_of(ttm, struct virtio_gpu_ttm_tt, ttm.ttm);
ttm_dma_tt_fini(&gtt->ttm);
kfree(gtt);
}
static struct ttm_backend_func virtio_gpu_backend_func = {
.bind = &virtio_gpu_ttm_backend_bind,
.unbind = &virtio_gpu_ttm_backend_unbind,
.destroy = &virtio_gpu_ttm_backend_destroy,
static struct ttm_backend_func virtio_gpu_tt_func = {
.bind = &virtio_gpu_ttm_tt_bind,
.unbind = &virtio_gpu_ttm_tt_unbind,
.destroy = &virtio_gpu_ttm_tt_destroy,
};
static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_buffer_object *bo,
@ -238,8 +241,8 @@ static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_buffer_object *bo,
gtt = kzalloc(sizeof(struct virtio_gpu_ttm_tt), GFP_KERNEL);
if (gtt == NULL)
return NULL;
gtt->ttm.ttm.func = &virtio_gpu_backend_func;
gtt->vgdev = vgdev;
gtt->ttm.ttm.func = &virtio_gpu_tt_func;
gtt->obj = container_of(bo, struct virtio_gpu_object, tbo);
if (ttm_dma_tt_init(&gtt->ttm, bo, page_flags)) {
kfree(gtt);
return NULL;
@ -247,51 +250,6 @@ static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_buffer_object *bo,
return &gtt->ttm.ttm;
}
static void virtio_gpu_move_null(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem)
{
struct ttm_mem_reg *old_mem = &bo->mem;
BUG_ON(old_mem->mm_node != NULL);
*old_mem = *new_mem;
new_mem->mm_node = NULL;
}
static int virtio_gpu_bo_move(struct ttm_buffer_object *bo, bool evict,
struct ttm_operation_ctx *ctx,
struct ttm_mem_reg *new_mem)
{
int ret;
ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
if (ret)
return ret;
virtio_gpu_move_null(bo, new_mem);
return 0;
}
static void virtio_gpu_bo_move_notify(struct ttm_buffer_object *tbo,
bool evict,
struct ttm_mem_reg *new_mem)
{
struct virtio_gpu_object *bo;
struct virtio_gpu_device *vgdev;
bo = container_of(tbo, struct virtio_gpu_object, tbo);
vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
if (!new_mem || (new_mem->placement & TTM_PL_FLAG_SYSTEM)) {
if (bo->hw_res_handle)
virtio_gpu_object_detach(vgdev, bo);
} else if (new_mem->placement & TTM_PL_FLAG_TT) {
if (bo->hw_res_handle) {
virtio_gpu_object_attach(vgdev, bo, NULL);
}
}
}
static void virtio_gpu_bo_swap_notify(struct ttm_buffer_object *tbo)
{
struct virtio_gpu_object *bo;
@ -308,11 +266,9 @@ static struct ttm_bo_driver virtio_gpu_bo_driver = {
.init_mem_type = &virtio_gpu_init_mem_type,
.eviction_valuable = ttm_bo_eviction_valuable,
.evict_flags = &virtio_gpu_evict_flags,
.move = &virtio_gpu_bo_move,
.verify_access = &virtio_gpu_verify_access,
.io_mem_reserve = &virtio_gpu_ttm_io_mem_reserve,
.io_mem_free = &virtio_gpu_ttm_io_mem_free,
.move_notify = &virtio_gpu_bo_move_notify,
.swap_notify = &virtio_gpu_bo_swap_notify,
};