diff options
| author | Dave Airlie <airlied@redhat.com> | 2012-04-02 11:46:06 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-05-23 10:46:27 +0100 |
| commit | 129b78bfca591e736e56a294f0e357d73d938f7e (patch) | |
| tree | b5754d4b12346b67077ac3b2239c04bda37bf6a0 /drivers/gpu/drm/ttm | |
| parent | 96503f592fd729f296f5870a57be0417eeffc92a (diff) | |
ttm: add prime sharing support to TTM (v2)
This adds the ability for ttm common code to take an SG table
and use it as the backing for a slave TTM object.
The drivers can then populate their GTT tables using the SG object.
v2: make sure to setup VM for sg bos as well.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/ttm')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 1f5c67c579c..36792bd4da7 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -343,6 +343,16 @@ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) if (unlikely(bo->ttm == NULL)) ret = -ENOMEM; break; + case ttm_bo_type_sg: + bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, + page_flags | TTM_PAGE_FLAG_SG, + glob->dummy_read_page); + if (unlikely(bo->ttm == NULL)) { + ret = -ENOMEM; + break; + } + bo->ttm->sg = bo->sg; + break; default: pr_err("Illegal buffer object type\n"); ret = -EINVAL; @@ -1169,6 +1179,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev, bool interruptible, struct file *persistent_swap_storage, size_t acc_size, + struct sg_table *sg, void (*destroy) (struct ttm_buffer_object *)) { int ret = 0; @@ -1223,6 +1234,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev, bo->seq_valid = false; bo->persistent_swap_storage = persistent_swap_storage; bo->acc_size = acc_size; + bo->sg = sg; atomic_inc(&bo->glob->bo_count); ret = ttm_bo_check_placement(bo, placement); @@ -1233,7 +1245,8 @@ int ttm_bo_init(struct ttm_bo_device *bdev, * For ttm_bo_type_device buffers, allocate * address space from the device. */ - if (bo->type == ttm_bo_type_device) { + if (bo->type == ttm_bo_type_device || + bo->type == ttm_bo_type_sg) { ret = ttm_bo_setup_vm(bo); if (ret) goto out_err; @@ -1312,7 +1325,7 @@ int ttm_bo_create(struct ttm_bo_device *bdev, ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, buffer_start, interruptible, - persistent_swap_storage, acc_size, NULL); + persistent_swap_storage, acc_size, NULL, NULL); if (likely(ret == 0)) *p_bo = bo; |