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authorDave Airlie <airlied@redhat.com>2012-04-02 11:46:06 +0100
committerDave Airlie <airlied@redhat.com>2012-05-23 10:46:27 +0100
commit129b78bfca591e736e56a294f0e357d73d938f7e (patch)
treeb5754d4b12346b67077ac3b2239c04bda37bf6a0 /include/drm
parent96503f592fd729f296f5870a57be0417eeffc92a (diff)
downloadop-kernel-dev-129b78bfca591e736e56a294f0e357d73d938f7e.zip
op-kernel-dev-129b78bfca591e736e56a294f0e357d73d938f7e.tar.gz
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 'include/drm')
-rw-r--r--include/drm/ttm/ttm_bo_api.h9
-rw-r--r--include/drm/ttm/ttm_bo_driver.h2
2 files changed, 10 insertions, 1 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 974c8f8..e15f2a8 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -124,11 +124,15 @@ struct ttm_mem_reg {
*
* @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers,
* but they cannot be accessed from user-space. For kernel-only use.
+ *
+ * @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another
+ * driver.
*/
enum ttm_bo_type {
ttm_bo_type_device,
- ttm_bo_type_kernel
+ ttm_bo_type_kernel,
+ ttm_bo_type_sg
};
struct ttm_tt;
@@ -271,6 +275,8 @@ struct ttm_buffer_object {
unsigned long offset;
uint32_t cur_placement;
+
+ struct sg_table *sg;
};
/**
@@ -503,6 +509,7 @@ extern int ttm_bo_init(struct ttm_bo_device *bdev,
bool interrubtible,
struct file *persistent_swap_storage,
size_t acc_size,
+ struct sg_table *sg,
void (*destroy) (struct ttm_buffer_object *));
/**
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index d43e892..a05f1b5 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -81,6 +81,7 @@ struct ttm_backend_func {
#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
#define TTM_PAGE_FLAG_DMA32 (1 << 7)
+#define TTM_PAGE_FLAG_SG (1 << 8)
enum ttm_caching_state {
tt_uncached,
@@ -116,6 +117,7 @@ struct ttm_tt {
struct page **pages;
uint32_t page_flags;
unsigned long num_pages;
+ struct sg_table *sg; /* for SG objects via dma-buf */
struct ttm_bo_global *glob;
struct ttm_backend *be;
struct file *swap_storage;
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