On Thu, Aug 14, 2014 at 06:12:04PM +0200, Christian König wrote:
> From: Christian König <christian.koenig@xxxxxxx>
>
> This allows userspace to explicitly don't sync submission to
> different rings as long as all uses stay in the same client.
>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
> ---
> drivers/gpu/drm/radeon/radeon.h | 3 +++
> drivers/gpu/drm/radeon/radeon_cs.c | 23 ++++++++++++++++++++++-
> drivers/gpu/drm/radeon/radeon_gem.c | 1 +
> drivers/gpu/drm/radeon/radeon_ttm.c | 3 +++
> include/uapi/drm/radeon_drm.h | 2 ++
> 5 files changed, 31 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
> index c0f7773..740a0b2 100644
> --- a/drivers/gpu/drm/radeon/radeon.h
> +++ b/drivers/gpu/drm/radeon/radeon.h
> @@ -478,6 +478,8 @@ struct radeon_bo {
> u32 tiling_flags;
> u32 pitch;
> int surface_reg;
> + struct drm_file *last_user;
> + struct radeon_fence *last_sync;
> struct radeon_fence *written;
> /* list of all virtual address to which this bo
> * is associated to
> @@ -1018,6 +1020,7 @@ struct radeon_cs_reloc {
> unsigned allowed_domains;
> uint32_t tiling_flags;
> uint32_t handle;
> + uint32_t flags;
> bool written;
> };
>
> diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
> index 3aa7e48..11e4789 100644
> --- a/drivers/gpu/drm/radeon/radeon_cs.c
> +++ b/drivers/gpu/drm/radeon/radeon_cs.c
> @@ -166,6 +166,7 @@ static int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
>
> p->relocs[i].tv.bo = &p->relocs[i].robj->tbo;
> p->relocs[i].handle = r->handle;
> + p->relocs[i].flags = r->flags;
> p->relocs[i].written = !!r->write_domain;
>
> radeon_cs_buckets_add(&buckets, &p->relocs[i].tv.head,
> @@ -236,6 +237,14 @@ static void radeon_cs_sync_rings(struct radeon_cs_parser *p)
> if (!bo)
> continue;
>
> + /* always sync to the last operation
> + the clients doesn't know about */
> + radeon_semaphore_sync_to(p->ib.presync, bo->last_sync);
> +
> + if (bo->last_user == p->filp &&
> + reloc->flags & RADEON_RELOC_DONT_SYNC)
> + continue;
> +
> fence = bo->tbo.sync_obj;
>
> if (bo->written && radeon_fence_signaled(bo->written))
> @@ -421,7 +430,19 @@ static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error, bo
> struct radeon_cs_reloc *reloc = &parser->relocs[i];
> struct radeon_bo *bo = reloc->robj;
>
> - if (!bo || !reloc->written)
> + if (!bo)
> + continue;
> +
> + /* if the client changes remember that and always serialize
> + all operations from different clients */
> + if (bo->last_user != parser->filp && bo->tbo.sync_obj) {
> + struct radeon_fence *fence = bo->tbo.sync_obj;
> + radeon_fence_unref(&bo->last_sync);
> + bo->last_sync = radeon_fence_ref(fence);
> + }
> + bo->last_user = parser->filp;
> +
> + if (!reloc->written)
> continue;
>
> radeon_fence_unref(&bo->written);
> diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
> index bfd7e1b..c73dbc1 100644
> --- a/drivers/gpu/drm/radeon/radeon_gem.c
> +++ b/drivers/gpu/drm/radeon/radeon_gem.c
> @@ -259,6 +259,7 @@ int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
> r = radeon_gem_handle_lockup(rdev, r);
> return r;
> }
> + gem_to_radeon_bo(gobj)->last_user = filp;
> r = drm_gem_handle_create(filp, gobj, &handle);
> /* drop reference from allocate - handle holds it now */
> drm_gem_object_unreference_unlocked(gobj);
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index 76be612..a4f964f 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -273,6 +273,9 @@ static int radeon_move_blit(struct ttm_buffer_object *bo,
> &fence);
>
> if (!r) {
> + rbo->last_user = NULL;
> + radeon_fence_unref(&rbo->last_sync);
> + rbo->last_sync = radeon_fence_ref(fence);
> radeon_fence_unref(&rbo->written);
> rbo->written = radeon_fence_ref(fence);
> }
> diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
> index 509b2d7..5bd3f68 100644
> --- a/include/uapi/drm/radeon_drm.h
> +++ b/include/uapi/drm/radeon_drm.h
> @@ -944,6 +944,8 @@ struct drm_radeon_cs_chunk {
> };
>
> /* drm_radeon_cs_reloc.flags */
> +#define RADEON_RELOC_PRIO_MASK (0xf << 0)
RADEON_RELOC_PRIO_MASK not use anywhere, not explain by anything, so new API
with no justification, i would say NAK
> +#define RADEON_RELOC_DONT_SYNC (1 << 4)
>
> struct drm_radeon_cs_reloc {
> uint32_t handle;
> --
> 1.9.1
>
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