Instead of relying on the DRM functions just implement our own import
functions. This adds support for taking care of unpinned DMA-buf.
Signed-off-by: Christian König <christian.koe...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 64 +++++++++++++++++++++++++------
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 32 +++++++++++++---
2 files changed, 80 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index f575fb46d7a8..7963ce329519 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -298,22 +298,64 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device
*dev,
return buf;
}
+static void
+amdgpu_gem_prime_invalidate_mappings(struct dma_buf_attachment *attach)
+{
+ struct ttm_operation_ctx ctx = { false, false };
+ struct drm_gem_object *obj = attach->priv;
+ struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+ int r;
+
+ amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
+ r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
+ if (r)
+ DRM_ERROR("Failed to unmap DMA-buf import (%d))\n", r);
+}
+
struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf)
{
+ struct dma_buf_attachment *attach;
struct drm_gem_object *obj;
+ int ret;
- if (dma_buf->ops == &amdgpu_dmabuf_ops) {
- obj = dma_buf->priv;
- if (obj->dev == dev) {
- /*
- * Importing dmabuf exported from out own gem increases
- * refcount on gem itself instead of f_count of dmabuf.
- */
- drm_gem_object_get(obj);
- return obj;
- }
+ if (dma_buf->ops != &amdgpu_dmabuf_ops)
+ return drm_gem_prime_import(dev, dma_buf);
+
+ obj = dma_buf->priv;
+ if (obj->dev == dev) {
+ /*
+ * Importing dmabuf exported from out own gem increases
+ * refcount on gem itself instead of f_count of dmabuf.
+ */
+ drm_gem_object_get(obj);
+ return obj;
+ }
+
+ /*
+ * Attach, but don't map other amdgpu BOs
+ */
+ attach = dma_buf_attach(dma_buf, dev->dev);
+ if (IS_ERR(attach))
+ return ERR_CAST(attach);
+
+ get_dma_buf(dma_buf);
+
+ obj = amdgpu_gem_prime_import_sg_table(dev, attach, NULL);
+ if (IS_ERR(obj)) {
+ ret = PTR_ERR(obj);
+ goto fail_detach;
}
- return drm_gem_prime_import(dev, dma_buf);
+ obj->import_attach = attach;
+ attach->invalidate_mappings = amdgpu_gem_prime_invalidate_mappings;
+ attach->priv = obj;
+
+ return obj;
+
+fail_detach:
+ dma_buf_detach(dma_buf, attach);
+ dma_buf_put(dma_buf);
+
+ return ERR_PTR(ret);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 291dd3d600cd..aeead0281e92 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -43,6 +43,7 @@
#include <linux/pagemap.h>
#include <linux/debugfs.h>
#include <linux/iommu.h>
+#include <linux/dma-buf.h>
#include "amdgpu.h"
#include "amdgpu_object.h"
#include "amdgpu_trace.h"
@@ -685,6 +686,7 @@ struct amdgpu_ttm_gup_task_list {
struct amdgpu_ttm_tt {
struct ttm_dma_tt ttm;
+ struct amdgpu_bo *bo;
u64 offset;
uint64_t userptr;
struct mm_struct *usermm;
@@ -993,6 +995,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct
ttm_buffer_object *bo,
return NULL;
}
gtt->ttm.ttm.func = &amdgpu_backend_func;
+ gtt->bo = ttm_to_amdgpu_bo(bo);
if (ttm_sg_tt_init(>t->ttm, bo, page_flags)) {
kfree(gtt);
return NULL;
@@ -1005,7 +1008,6 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
{
struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void *)ttm;
- bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
if (gtt && gtt->userptr) {
ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
@@ -1017,7 +1019,19 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
return 0;
}
- if (slave && ttm->sg) {
+ if (ttm->page_flags & TTM_PAGE_FLAG_SG) {
+ if (!ttm->sg) {
+ struct dma_buf_attachment *attach;
+ struct sg_table *sgt;
+
+ attach = gtt->bo->gem_base.import_attach;
+ sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
+ if (IS_ERR(sgt))
+ return PTR_ERR(sgt);
+
+ ttm->sg = sgt;
+ }
+
drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
gtt->ttm.dma_address,
ttm->num_pages);
@@ -1036,9 +1050,8 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
{
- struct amdgpu_device *adev;
struct amdgpu_ttm_tt *gtt = (void *)ttm;
- bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+ struct amdgpu_device *adev;
if (gtt && gtt->userptr) {
amdgpu_ttm_tt_set_user_pages(ttm, NULL);
@@ -1047,7 +1060,16 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
return;
}
- if (slave)
+ if (ttm->sg && !gtt->bo->tbo.sg) {
+ struct dma_buf_attachment *attach;
+
+ attach = gtt->bo->gem_base.import_attach;
+ dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL);
+ ttm->sg = NULL;
+ return;
+ }
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_SG)
return;
adev = amdgpu_ttm_adev(ttm->bdev);
--
2.14.1
