On 2022-03-21 at 11:11:33 +0100, Das, Nirmoy wrote:
> In the previous version I replied only to the mailing list email so probably
> my email slipped through.
Sorry for the miss. Thank so much for the review.
Ram
>
> Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxx> for patch 6-7
>
> On 3/19/2022 9:42 PM, Ramalingam C wrote:
> > Add a parameter called "extra_pages" for ttm_tt_init, to indicate that
> > driver needs extra pages in ttm_tt.
> >
> > v2:
> > Used imperative wording [Thomas and Christian]
> >
> > Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> > cc: Christian Koenig <christian.koenig@xxxxxxx>
> > cc: Hellstrom Thomas <thomas.hellstrom@xxxxxxxxx>
> > Reviewed-by: Thomas Hellstrom <thomas.hellstrom@xxxxxxxxxxxxxxx>
> > Reviewed-by: Christian Konig <christian.koenig@xxxxxxx>
> > ---
> > drivers/gpu/drm/drm_gem_vram_helper.c | 2 +-
> > drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 2 +-
> > drivers/gpu/drm/qxl/qxl_ttm.c | 2 +-
> > drivers/gpu/drm/ttm/ttm_agp_backend.c | 2 +-
> > drivers/gpu/drm/ttm/ttm_tt.c | 12 +++++++-----
> > drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 2 +-
> > include/drm/ttm/ttm_tt.h | 4 +++-
> > 7 files changed, 15 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> > index dc7f938bfff2..123045b58fec 100644
> > --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> > +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> > @@ -867,7 +867,7 @@ static struct ttm_tt *bo_driver_ttm_tt_create(struct ttm_buffer_object *bo,
> > if (!tt)
> > return NULL;
> > - ret = ttm_tt_init(tt, bo, page_flags, ttm_cached);
> > + ret = ttm_tt_init(tt, bo, page_flags, ttm_cached, 0);
> > if (ret < 0)
> > goto err_ttm_tt_init;
> > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> > index e4a06fcf741a..3b9f99c765c4 100644
> > --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> > +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> > @@ -290,7 +290,7 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,
> > i915_tt->is_shmem = true;
> > }
> > - ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching);
> > + ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching, 0);
> > if (ret)
> > goto err_free;
> > diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
> > index b2e33d5ba5d0..52156b54498f 100644
> > --- a/drivers/gpu/drm/qxl/qxl_ttm.c
> > +++ b/drivers/gpu/drm/qxl/qxl_ttm.c
> > @@ -113,7 +113,7 @@ static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
> > ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
> > if (ttm == NULL)
> > return NULL;
> > - if (ttm_tt_init(ttm, bo, page_flags, ttm_cached)) {
> > + if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
> > kfree(ttm);
> > return NULL;
> > }
> > diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
> > index 6ddc16f0fe2b..d27691f2e451 100644
> > --- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
> > +++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
> > @@ -134,7 +134,7 @@ struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
> > agp_be->mem = NULL;
> > agp_be->bridge = bridge;
> > - if (ttm_tt_init(&agp_be->ttm, bo, page_flags, ttm_write_combined)) {
> > + if (ttm_tt_init(&agp_be->ttm, bo, page_flags, ttm_write_combined, 0)) {
> > kfree(agp_be);
> > return NULL;
> > }
> > diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> > index d234aab800a0..1a66d9fc589a 100644
> > --- a/drivers/gpu/drm/ttm/ttm_tt.c
> > +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> > @@ -134,9 +134,10 @@ void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
> > static void ttm_tt_init_fields(struct ttm_tt *ttm,
> > struct ttm_buffer_object *bo,
> > uint32_t page_flags,
> > - enum ttm_caching caching)
> > + enum ttm_caching caching,
> > + unsigned long extra_pages)
> > {
> > - ttm->num_pages = PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT;
> > + ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;
> > ttm->caching = ttm_cached;
> > ttm->page_flags = page_flags;
> > ttm->dma_address = NULL;
> > @@ -146,9 +147,10 @@ static void ttm_tt_init_fields(struct ttm_tt *ttm,
> > }
> > int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
> > - uint32_t page_flags, enum ttm_caching caching)
> > + uint32_t page_flags, enum ttm_caching caching,
> > + unsigned long extra_pages)
> > {
> > - ttm_tt_init_fields(ttm, bo, page_flags, caching);
> > + ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);
> > if (ttm_tt_alloc_page_directory(ttm)) {
> > pr_err("Failed allocating page table\n");
> > @@ -180,7 +182,7 @@ int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
> > {
> > int ret;
> > - ttm_tt_init_fields(ttm, bo, page_flags, caching);
> > + ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);
> > if (page_flags & TTM_TT_FLAG_EXTERNAL)
> > ret = ttm_sg_tt_alloc_page_directory(ttm);
> > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > index b84ecc6d6611..4e3938e62c08 100644
> > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
> > @@ -517,7 +517,7 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
> > ttm_cached);
> > else
> > ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
> > - ttm_cached);
> > + ttm_cached, 0);
> > if (unlikely(ret != 0))
> > goto out_no_init;
> > diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
> > index f20832139815..17a0310e8aaa 100644
> > --- a/include/drm/ttm/ttm_tt.h
> > +++ b/include/drm/ttm/ttm_tt.h
> > @@ -140,6 +140,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc);
> > * @bo: The buffer object we create the ttm for.
> > * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
> > * @caching: the desired caching state of the pages
> > + * @extra_pages: Extra pages needed for the driver.
> > *
> > * Create a struct ttm_tt to back data with system memory pages.
> > * No pages are actually allocated.
> > @@ -147,7 +148,8 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc);
> > * NULL: Out of memory.
> > */
> > int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
> > - uint32_t page_flags, enum ttm_caching caching);
> > + uint32_t page_flags, enum ttm_caching caching,
> > + unsigned long extra_pages);
> > int ttm_sg_tt_init(struct ttm_tt *ttm_dma, struct ttm_buffer_object *bo,
> > uint32_t page_flags, enum ttm_caching caching);
