[Intel-gfx] [PATCH 1/3] drm/ttm: s/FLAG_SG/FLAG_EXTERNAL/
Matthew Auld
matthew.william.auld at gmail.com
Thu Sep 30 07:42:45 UTC 2021
On Thu, 30 Sept 2021 at 08:28, Christian König <christian.koenig at amd.com> 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
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.
>
> 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 at amd.com>
> > Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> > Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
> > Cc: Christian König <christian.koenig at amd.com>
> > Acked-by: Christian König <christian.koenig at amd.com>
> > ---
> > 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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