Re: [Intel-gfx] [PATCH 1/3] drm/ttm: s/FLAG_SG/FLAG_EXTERNAL/

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Am 30.09.21 um 09:42 schrieb Matthew Auld:
On Thu, 30 Sept 2021 at 08:28, Christian König <christian.koenig@xxxxxxx> wrote:
I pushed those to drm-misc-next and fixed the i915 merge fallout in drm-tip.

Maybe take another look at the resolution in drm-tip if you have time.
Thanks, although it looks like there is some breakage in the build on drm-tip:

drivers/gpu/drm/ttm/ttm_bo_util.c: In function ‘ttm_bo_move_memcpy’:
drivers/gpu/drm/ttm/ttm_bo_util.c:172:44: error:
‘TTM_PAGE_FLAG_ZERO_ALLOC’ undeclared (first use in this function);
did you mean ‘TTM_TT_FLAG_ZERO_ALLOC’?
172 | if (!(clear && ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)))

...

drivers/gpu/drm/i915/gem/i915_gem_ttm.c: In function ‘i915_ttm_move’:
drivers/gpu/drm/i915/gem/i915_gem_ttm.c:576:44: error:
‘TTM_PAGE_FLAG_ZERO_ALLOC’ undeclared (first use in this function);
did you mean ‘TTM_TT_FLAG_ZERO_ALLOC’?
576 | if (!(clear && ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)))
| ^~~~~~~~~~~~~~~~~~~~~~~~
| TTM_TT_FLAG_ZERO_ALLOC


Crap, I hoped that I got all of those.

Do we just need to revert the bad commit in drm-rerere, rebuild tip,
and try again? If so I can try to attempt this.

Yes, please do so. I can't easily build drm-tip, would need to setup another box extra for this.

Christian.


Christian.

Am 29.09.21 um 15:26 schrieb Matthew Auld:
It covers more than just ttm_bo_type_sg usage, like with say dma-buf,
since one other user is userptr in amdgpu, and in the future we might
have some more. Hence EXTERNAL is likely a more suitable name.

v2(Christian):
    - Rename these to TTM_TT_FLAGS_*
    - Fix up all the holes in the flag values

Suggested-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
---
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 10 +++++-----
   drivers/gpu/drm/i915/gem/i915_gem_ttm.c |  6 +++---
   drivers/gpu/drm/nouveau/nouveau_bo.c    |  4 ++--
   drivers/gpu/drm/radeon/radeon_ttm.c     |  8 ++++----
   drivers/gpu/drm/ttm/ttm_bo.c            |  4 ++--
   drivers/gpu/drm/ttm/ttm_bo_util.c       |  4 ++--
   drivers/gpu/drm/ttm/ttm_bo_vm.c         |  2 +-
   drivers/gpu/drm/ttm/ttm_pool.c          |  2 +-
   drivers/gpu/drm/ttm/ttm_tt.c            | 24 ++++++++++++------------
   include/drm/ttm/ttm_device.h            |  2 +-
   include/drm/ttm/ttm_tt.h                | 18 +++++++++---------
   11 files changed, 42 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 60b12bb55244..e8d70b6e6737 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -894,7 +894,7 @@ static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
                       DRM_ERROR("failed to pin userptr\n");
                       return r;
               }
-     } else if (ttm->page_flags & TTM_PAGE_FLAG_SG) {
+     } else if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) {
               if (!ttm->sg) {
                       struct dma_buf_attachment *attach;
                       struct sg_table *sgt;
@@ -1130,7 +1130,7 @@ static int amdgpu_ttm_tt_populate(struct ttm_device *bdev,
               return 0;
       }

-     if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+     if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
               return 0;

       ret = ttm_pool_alloc(&adev->mman.bdev.pool, ttm, ctx);
@@ -1165,7 +1165,7 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev,
               return;
       }

-     if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+     if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
               return;

       for (i = 0; i < ttm->num_pages; ++i)
@@ -1198,8 +1198,8 @@ int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
                       return -ENOMEM;
       }

-     /* Set TTM_PAGE_FLAG_SG before populate but after create. */
-     bo->ttm->page_flags |= TTM_PAGE_FLAG_SG;
+     /* Set TTM_TT_FLAG_EXTERNAL before populate but after create. */
+     bo->ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;

       gtt = (void *)bo->ttm;
       gtt->userptr = addr;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index f0a61a9474fc..8beef57ba52b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -182,7 +182,7 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,

       if (obj->flags & I915_BO_ALLOC_CPU_CLEAR &&
           man->use_tt)
-             page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+             page_flags |= TTM_TT_FLAG_ZERO_ALLOC;

       ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags,
                         i915_ttm_select_tt_caching(obj));
@@ -451,7 +451,7 @@ static int i915_ttm_accel_move(struct ttm_buffer_object *bo,
               if (bo->type == ttm_bo_type_kernel)
                       return -EINVAL;

-             if (ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC))
+             if (ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC))
                       return 0;

               intel_engine_pm_get(i915->gt.migrate.context->engine);
@@ -525,7 +525,7 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict,

       /* Populate ttm with pages if needed. Typically system memory. */
       if (bo->ttm && (dst_man->use_tt ||
-                     (bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED))) {
+                     (bo->ttm->page_flags & TTM_TT_FLAG_SWAPPED))) {
               ret = ttm_tt_populate(bo->bdev, bo->ttm, ctx);
               if (ret)
                       return ret;
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 33dca2565cca..b2c7e0802ac3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -1249,7 +1249,7 @@ nouveau_ttm_tt_populate(struct ttm_device *bdev,
       struct ttm_tt *ttm_dma = (void *)ttm;
       struct nouveau_drm *drm;
       struct device *dev;
-     bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+     bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);

       if (ttm_tt_is_populated(ttm))
               return 0;
@@ -1272,7 +1272,7 @@ nouveau_ttm_tt_unpopulate(struct ttm_device *bdev,
   {
       struct nouveau_drm *drm;
       struct device *dev;
-     bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+     bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);

       if (slave)
               return;
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 7793249bc549..11b21d605584 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -545,14 +545,14 @@ static int radeon_ttm_tt_populate(struct ttm_device *bdev,
   {
       struct radeon_device *rdev = radeon_get_rdev(bdev);
       struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
-     bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+     bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);

       if (gtt && gtt->userptr) {
               ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
               if (!ttm->sg)
                       return -ENOMEM;

-             ttm->page_flags |= TTM_PAGE_FLAG_SG;
+             ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
               return 0;
       }

@@ -569,13 +569,13 @@ static void radeon_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm
   {
       struct radeon_device *rdev = radeon_get_rdev(bdev);
       struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
-     bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+     bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);

       radeon_ttm_tt_unbind(bdev, ttm);

       if (gtt && gtt->userptr) {
               kfree(ttm->sg);
-             ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
+             ttm->page_flags &= ~TTM_TT_FLAG_EXTERNAL;
               return;
       }

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 3b22c0013dbf..d62b2013c367 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1115,8 +1115,8 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
               return -EBUSY;

       if (!bo->ttm || !ttm_tt_is_populated(bo->ttm) ||
-         bo->ttm->page_flags & TTM_PAGE_FLAG_SG ||
-         bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED ||
+         bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL ||
+         bo->ttm->page_flags & TTM_TT_FLAG_SWAPPED ||
           !ttm_bo_get_unless_zero(bo)) {
               if (locked)
                       dma_resv_unlock(bo->base.resv);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 1c5ffe2935af..82af095f6b81 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -103,7 +103,7 @@ void ttm_move_memcpy(struct ttm_buffer_object *bo,

       /* Don't move nonexistent data. Clear destination instead. */
       if (src_ops->maps_tt && (!ttm || !ttm_tt_is_populated(ttm))) {
-             if (ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC))
+             if (ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC))
                       return;

               for (i = 0; i < num_pages; ++i) {
@@ -150,7 +150,7 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
       struct ttm_kmap_iter *dst_iter, *src_iter;
       int ret = 0;

-     if (ttm && ((ttm->page_flags & TTM_PAGE_FLAG_SWAPPED) ||
+     if (ttm && ((ttm->page_flags & TTM_TT_FLAG_SWAPPED) ||
                   dst_man->use_tt)) {
               ret = ttm_tt_populate(bdev, ttm, ctx);
               if (ret)
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 9a2119fe4bdd..950f4f132802 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -162,7 +162,7 @@ vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
        * Refuse to fault imported pages. This should be handled
        * (if at all) by redirecting mmap to the exporter.
        */
-     if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+     if (bo->ttm && (bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
               dma_resv_unlock(bo->base.resv);
               return VM_FAULT_SIGBUS;
       }
diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
index c961a788b519..1bba0a0ed3f9 100644
--- a/drivers/gpu/drm/ttm/ttm_pool.c
+++ b/drivers/gpu/drm/ttm/ttm_pool.c
@@ -371,7 +371,7 @@ int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
       WARN_ON(!num_pages || ttm_tt_is_populated(tt));
       WARN_ON(dma_addr && !pool->dev);

-     if (tt->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+     if (tt->page_flags & TTM_TT_FLAG_ZERO_ALLOC)
               gfp_flags |= __GFP_ZERO;

       if (ctx->gfp_retry_mayfail)
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 980ecb079b2c..86f31fde6e35 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -68,12 +68,12 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
       switch (bo->type) {
       case ttm_bo_type_device:
               if (zero_alloc)
-                     page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+                     page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
               break;
       case ttm_bo_type_kernel:
               break;
       case ttm_bo_type_sg:
-             page_flags |= TTM_PAGE_FLAG_SG;
+             page_flags |= TTM_TT_FLAG_EXTERNAL;
               break;
       default:
               pr_err("Illegal buffer object type\n");
@@ -156,7 +156,7 @@ EXPORT_SYMBOL(ttm_tt_init);

   void ttm_tt_fini(struct ttm_tt *ttm)
   {
-     WARN_ON(ttm->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED);
+     WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);

       if (ttm->swap_storage)
               fput(ttm->swap_storage);
@@ -178,7 +178,7 @@ int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,

       ttm_tt_init_fields(ttm, bo, page_flags, caching);

-     if (page_flags & TTM_PAGE_FLAG_SG)
+     if (page_flags & TTM_TT_FLAG_EXTERNAL)
               ret = ttm_sg_tt_alloc_page_directory(ttm);
       else
               ret = ttm_dma_tt_alloc_page_directory(ttm);
@@ -224,7 +224,7 @@ int ttm_tt_swapin(struct ttm_tt *ttm)

       fput(swap_storage);
       ttm->swap_storage = NULL;
-     ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
+     ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;

       return 0;

@@ -279,7 +279,7 @@ int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,

       ttm_tt_unpopulate(bdev, ttm);
       ttm->swap_storage = swap_storage;
-     ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
+     ttm->page_flags |= TTM_TT_FLAG_SWAPPED;

       return ttm->num_pages;

@@ -300,7 +300,7 @@ int ttm_tt_populate(struct ttm_device *bdev,
       if (ttm_tt_is_populated(ttm))
               return 0;

-     if (!(ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+     if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
               atomic_long_add(ttm->num_pages, &ttm_pages_allocated);
               if (bdev->pool.use_dma32)
                       atomic_long_add(ttm->num_pages,
@@ -325,8 +325,8 @@ int ttm_tt_populate(struct ttm_device *bdev,
       if (ret)
               goto error;

-     ttm->page_flags |= TTM_PAGE_FLAG_PRIV_POPULATED;
-     if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+     ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;
+     if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {
               ret = ttm_tt_swapin(ttm);
               if (unlikely(ret != 0)) {
                       ttm_tt_unpopulate(bdev, ttm);
@@ -337,7 +337,7 @@ int ttm_tt_populate(struct ttm_device *bdev,
       return 0;

   error:
-     if (!(ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+     if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
               atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);
               if (bdev->pool.use_dma32)
                       atomic_long_sub(ttm->num_pages,
@@ -357,14 +357,14 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
       else
               ttm_pool_free(&bdev->pool, ttm);

-     if (!(ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+     if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
               atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);
               if (bdev->pool.use_dma32)
                       atomic_long_sub(ttm->num_pages,
                                       &ttm_dma32_pages_allocated);
       }

-     ttm->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
+     ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;
   }

   #ifdef CONFIG_DEBUG_FS
diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h
index cbe03d45e883..0a4ddec78d8f 100644
--- a/include/drm/ttm/ttm_device.h
+++ b/include/drm/ttm/ttm_device.h
@@ -65,7 +65,7 @@ struct ttm_device_funcs {
        * ttm_tt_create
        *
        * @bo: The buffer object to create the ttm for.
-      * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+      * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
        *
        * Create a struct ttm_tt to back data with system memory pages.
        * No pages are actually allocated.
diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
index 842ce756213c..b023cd58ff38 100644
--- a/include/drm/ttm/ttm_tt.h
+++ b/include/drm/ttm/ttm_tt.h
@@ -38,17 +38,17 @@ struct ttm_resource;
   struct ttm_buffer_object;
   struct ttm_operation_ctx;

-#define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
-#define TTM_PAGE_FLAG_ZERO_ALLOC      (1 << 6)
-#define TTM_PAGE_FLAG_SG              (1 << 8)
+#define TTM_TT_FLAG_SWAPPED  (1 << 0)
+#define TTM_TT_FLAG_ZERO_ALLOC       (1 << 1)
+#define TTM_TT_FLAG_EXTERNAL (1 << 2)

-#define TTM_PAGE_FLAG_PRIV_POPULATED  (1 << 31)
+#define TTM_TT_FLAG_PRIV_POPULATED  (1 << 31)

   /**
    * struct ttm_tt
    *
    * @pages: Array of pages backing the data.
- * @page_flags: see TTM_PAGE_FLAG_*
+ * @page_flags: see TTM_TT_FLAG_*
    * @num_pages: Number of pages in the page array.
    * @sg: for SG objects via dma-buf
    * @dma_address: The DMA (bus) addresses of the pages
@@ -84,7 +84,7 @@ struct ttm_kmap_iter_tt {

   static inline bool ttm_tt_is_populated(struct ttm_tt *tt)
   {
-     return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED;
+     return tt->page_flags & TTM_TT_FLAG_PRIV_POPULATED;
   }

   /**
@@ -103,7 +103,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc);
    *
    * @ttm: The struct ttm_tt.
    * @bo: The buffer object we create the ttm for.
- * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
    * @caching: the desired caching state of the pages
    *
    * Create a struct ttm_tt to back data with system memory pages.
@@ -178,7 +178,7 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm);
    */
   static inline void ttm_tt_mark_for_clear(struct ttm_tt *ttm)
   {
-     ttm->page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+     ttm->page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
   }

   void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages);
@@ -194,7 +194,7 @@ struct ttm_kmap_iter *ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt,
    *
    * @bo: Buffer object we allocate the ttm for.
    * @bridge: The agp bridge this device is sitting on.
- * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
    *
    *
    * Create a TTM backend that uses the indicated AGP bridge as an aperture




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