Gerd Hoffmann
2020-Aug-18 09:20 UTC
[Nouveau] [PATCH v2 1/2] drm: allow limiting the scatter list size.
Add max_segment argument to drm_prime_pages_to_sg(). When set pass it
through to the __sg_alloc_table_from_pages() call, otherwise use
SCATTERLIST_MAX_SEGMENT.
Also add max_segment field to drm driver and pass it to
drm_prime_pages_to_sg() calls in drivers and helpers.
v2: place max_segment in drm driver not gem object.
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
include/drm/drm_device.h | 8 ++++++++
include/drm/drm_prime.h | 3 ++-
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 3 ++-
drivers/gpu/drm/drm_gem_shmem_helper.c | 3 ++-
drivers/gpu/drm/drm_prime.c | 10 +++++++---
drivers/gpu/drm/etnaviv/etnaviv_gem.c | 3 ++-
drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 3 ++-
drivers/gpu/drm/msm/msm_gem.c | 3 ++-
drivers/gpu/drm/msm/msm_gem_prime.c | 3 ++-
drivers/gpu/drm/nouveau/nouveau_prime.c | 3 ++-
drivers/gpu/drm/radeon/radeon_prime.c | 3 ++-
drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 6 ++++--
drivers/gpu/drm/tegra/gem.c | 3 ++-
drivers/gpu/drm/vgem/vgem_drv.c | 3 ++-
drivers/gpu/drm/xen/xen_drm_front_gem.c | 3 ++-
15 files changed, 43 insertions(+), 17 deletions(-)
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
index 0988351d743c..47cb547a8115 100644
--- a/include/drm/drm_device.h
+++ b/include/drm/drm_device.h
@@ -329,6 +329,14 @@ struct drm_device {
*/
struct drm_fb_helper *fb_helper;
+ /**
+ * @max_segment:
+ *
+ * Max size for scatter list segments. When unset the default
+ * (SCATTERLIST_MAX_SEGMENT) is used.
+ */
+ size_t max_segment;
+
/* Everything below here is for legacy driver, never use! */
/* private: */
#if IS_ENABLED(CONFIG_DRM_LEGACY)
diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h
index 9af7422b44cf..2c3689435cb4 100644
--- a/include/drm/drm_prime.h
+++ b/include/drm/drm_prime.h
@@ -88,7 +88,8 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void
*vaddr);
int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
-struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int
nr_pages);
+struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int
nr_pages,
+ size_t max_segment);
struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj,
int flags);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 519ce4427fce..8f6a647757e7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -303,7 +303,8 @@ static struct sg_table *amdgpu_dma_buf_map(struct
dma_buf_attachment *attach,
switch (bo->tbo.mem.mem_type) {
case TTM_PL_TT:
sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages,
- bo->tbo.num_pages);
+ bo->tbo.num_pages,
+ obj->dev->max_segment);
if (IS_ERR(sgt))
return sgt;
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c
b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 4b7cfbac4daa..8f47b41b0b2f 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -656,7 +656,8 @@ struct sg_table *drm_gem_shmem_get_sg_table(struct
drm_gem_object *obj)
WARN_ON(shmem->base.import_attach);
- return drm_prime_pages_to_sg(shmem->pages, obj->size >>
PAGE_SHIFT);
+ return drm_prime_pages_to_sg(shmem->pages, obj->size >>
PAGE_SHIFT,
+ obj->dev->max_segment);
}
EXPORT_SYMBOL_GPL(drm_gem_shmem_get_sg_table);
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 1693aa7c14b5..27c783fd6633 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -802,7 +802,8 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops =
{
*
* This is useful for implementing &drm_gem_object_funcs.get_sg_table.
*/
-struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int
nr_pages)
+struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int
nr_pages,
+ size_t max_segment)
{
struct sg_table *sg = NULL;
int ret;
@@ -813,8 +814,11 @@ struct sg_table *drm_prime_pages_to_sg(struct page **pages,
unsigned int nr_page
goto out;
}
- ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
- nr_pages << PAGE_SHIFT, GFP_KERNEL);
+ if (max_segment == 0 || max_segment > SCATTERLIST_MAX_SEGMENT)
+ max_segment = SCATTERLIST_MAX_SEGMENT;
+ ret = __sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
+ nr_pages << PAGE_SHIFT,
+ max_segment, GFP_KERNEL);
if (ret)
goto out;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
index f06e19e7be04..90654246b335 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -103,7 +103,8 @@ struct page **etnaviv_gem_get_pages(struct
etnaviv_gem_object *etnaviv_obj)
int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
struct sg_table *sgt;
- sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
+ sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages,
+ etnaviv_obj->base.dev->max_segment);
if (IS_ERR(sgt)) {
dev_err(dev->dev, "failed to allocate sgt: %ld\n",
PTR_ERR(sgt));
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
index 6d9e5c3c4dd5..f65be0fffb3d 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -19,7 +19,8 @@ struct sg_table *etnaviv_gem_prime_get_sg_table(struct
drm_gem_object *obj)
if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */
return ERR_PTR(-EINVAL);
- return drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
+ return drm_prime_pages_to_sg(etnaviv_obj->pages, npages,
+ obj->dev->max_segment);
}
void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj)
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index b2f49152b4d4..dbf1437c3dac 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -126,7 +126,8 @@ static struct page **get_pages(struct drm_gem_object *obj)
msm_obj->pages = p;
- msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
+ msm_obj->sgt = drm_prime_pages_to_sg(p, npages,
+ obj->dev->max_segment);
if (IS_ERR(msm_obj->sgt)) {
void *ptr = ERR_CAST(msm_obj->sgt);
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c
b/drivers/gpu/drm/msm/msm_gem_prime.c
index d7c8948427fe..6337cd1f9428 100644
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -19,7 +19,8 @@ struct sg_table *msm_gem_prime_get_sg_table(struct
drm_gem_object *obj)
if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
return NULL;
- return drm_prime_pages_to_sg(msm_obj->pages, npages);
+ return drm_prime_pages_to_sg(msm_obj->pages, npages,
+ obj->dev->max_segment);
}
void *msm_gem_prime_vmap(struct drm_gem_object *obj)
diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c
b/drivers/gpu/drm/nouveau/nouveau_prime.c
index bae6a3eccee0..dd0ff032ae16 100644
--- a/drivers/gpu/drm/nouveau/nouveau_prime.c
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -32,7 +32,8 @@ struct sg_table *nouveau_gem_prime_get_sg_table(struct
drm_gem_object *obj)
struct nouveau_bo *nvbo = nouveau_gem_object(obj);
int npages = nvbo->bo.num_pages;
- return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
+ return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages,
+ obj->dev->max_segment);
}
void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c
b/drivers/gpu/drm/radeon/radeon_prime.c
index b906e8fbd5f3..61a3fe147489 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -36,7 +36,8 @@ struct sg_table *radeon_gem_prime_get_sg_table(struct
drm_gem_object *obj)
struct radeon_bo *bo = gem_to_radeon_bo(obj);
int npages = bo->tbo.num_pages;
- return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
+ return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages,
+ obj->dev->max_segment);
}
void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index b9275ba7c5a5..5ddb2d31a607 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -85,7 +85,8 @@ static int rockchip_gem_get_pages(struct rockchip_gem_object
*rk_obj)
rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
- rk_obj->sgt = drm_prime_pages_to_sg(rk_obj->pages,
rk_obj->num_pages);
+ rk_obj->sgt = drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages,
+ rk_obj->base.dev->max_segment);
if (IS_ERR(rk_obj->sgt)) {
ret = PTR_ERR(rk_obj->sgt);
goto err_put_pages;
@@ -442,7 +443,8 @@ struct sg_table *rockchip_gem_prime_get_sg_table(struct
drm_gem_object *obj)
int ret;
if (rk_obj->pages)
- return drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages);
+ return drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages,
+ obj->dev->max_segment);
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
if (!sgt)
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 723df142a981..a0abde747e95 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -284,7 +284,8 @@ static int tegra_bo_get_pages(struct drm_device *drm, struct
tegra_bo *bo)
bo->num_pages = bo->gem.size >> PAGE_SHIFT;
- bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages);
+ bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages,
+ bo->gem.dev->max_segment);
if (IS_ERR(bo->sgt)) {
err = PTR_ERR(bo->sgt);
goto put_pages;
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 313339bbff90..045461dc6319 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -321,7 +321,8 @@ static struct sg_table *vgem_prime_get_sg_table(struct
drm_gem_object *obj)
{
struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
- return drm_prime_pages_to_sg(bo->pages, bo->base.size >>
PAGE_SHIFT);
+ return drm_prime_pages_to_sg(bo->pages, bo->base.size >>
PAGE_SHIFT,
+ obj->dev->max_segment);
}
static struct drm_gem_object* vgem_prime_import(struct drm_device *dev,
diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c
b/drivers/gpu/drm/xen/xen_drm_front_gem.c
index f0b85e094111..61a8c1a9fb04 100644
--- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
@@ -179,7 +179,8 @@ struct sg_table *xen_drm_front_gem_get_sg_table(struct
drm_gem_object *gem_obj)
if (!xen_obj->pages)
return ERR_PTR(-ENOMEM);
- return drm_prime_pages_to_sg(xen_obj->pages, xen_obj->num_pages);
+ return drm_prime_pages_to_sg(xen_obj->pages, xen_obj->num_pages,
+ gem_obj->dev->max_segment);
}
struct drm_gem_object *
--
2.18.4
Daniel Vetter
2020-Sep-01 07:40 UTC
[Nouveau] [PATCH v2 1/2] drm: allow limiting the scatter list size.
On Tue, Aug 18, 2020 at 11:20:16AM +0200, Gerd Hoffmann wrote:> Add max_segment argument to drm_prime_pages_to_sg(). When set pass it > through to the __sg_alloc_table_from_pages() call, otherwise use > SCATTERLIST_MAX_SEGMENT. > > Also add max_segment field to drm driver and pass it to > drm_prime_pages_to_sg() calls in drivers and helpers. > > v2: place max_segment in drm driver not gem object. > > Signed-off-by: Gerd Hoffmann <kraxel at redhat.com> > --- > include/drm/drm_device.h | 8 ++++++++ > include/drm/drm_prime.h | 3 ++- > drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 3 ++- > drivers/gpu/drm/drm_gem_shmem_helper.c | 3 ++- > drivers/gpu/drm/drm_prime.c | 10 +++++++--- > drivers/gpu/drm/etnaviv/etnaviv_gem.c | 3 ++- > drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 3 ++- > drivers/gpu/drm/msm/msm_gem.c | 3 ++- > drivers/gpu/drm/msm/msm_gem_prime.c | 3 ++- > drivers/gpu/drm/nouveau/nouveau_prime.c | 3 ++- > drivers/gpu/drm/radeon/radeon_prime.c | 3 ++- > drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 6 ++++-- > drivers/gpu/drm/tegra/gem.c | 3 ++- > drivers/gpu/drm/vgem/vgem_drv.c | 3 ++- > drivers/gpu/drm/xen/xen_drm_front_gem.c | 3 ++- > 15 files changed, 43 insertions(+), 17 deletions(-) > > diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h > index 0988351d743c..47cb547a8115 100644 > --- a/include/drm/drm_device.h > +++ b/include/drm/drm_device.h > @@ -329,6 +329,14 @@ struct drm_device { > */ > struct drm_fb_helper *fb_helper; > > + /** > + * @max_segment: > + * > + * Max size for scatter list segments. When unset the default > + * (SCATTERLIST_MAX_SEGMENT) is used. > + */ > + size_t max_segment;Is there no better place for this then "at the bottom"? drm_device is a huge structure, piling stuff up randomly doesn't make it better :-) I think ideally we'd have a gem substruct like we have on the modeset side at least. -Daniel> + > /* Everything below here is for legacy driver, never use! */ > /* private: */ > #if IS_ENABLED(CONFIG_DRM_LEGACY) > diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h > index 9af7422b44cf..2c3689435cb4 100644 > --- a/include/drm/drm_prime.h > +++ b/include/drm/drm_prime.h > @@ -88,7 +88,8 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr); > int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); > int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma); > > -struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages); > +struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages, > + size_t max_segment); > struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj, > int flags); > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c > index 519ce4427fce..8f6a647757e7 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c > @@ -303,7 +303,8 @@ static struct sg_table *amdgpu_dma_buf_map(struct dma_buf_attachment *attach, > switch (bo->tbo.mem.mem_type) { > case TTM_PL_TT: > sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages, > - bo->tbo.num_pages); > + bo->tbo.num_pages, > + obj->dev->max_segment); > if (IS_ERR(sgt)) > return sgt; > > diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c > index 4b7cfbac4daa..8f47b41b0b2f 100644 > --- a/drivers/gpu/drm/drm_gem_shmem_helper.c > +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c > @@ -656,7 +656,8 @@ struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj) > > WARN_ON(shmem->base.import_attach); > > - return drm_prime_pages_to_sg(shmem->pages, obj->size >> PAGE_SHIFT); > + return drm_prime_pages_to_sg(shmem->pages, obj->size >> PAGE_SHIFT, > + obj->dev->max_segment); > } > EXPORT_SYMBOL_GPL(drm_gem_shmem_get_sg_table); > > diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c > index 1693aa7c14b5..27c783fd6633 100644 > --- a/drivers/gpu/drm/drm_prime.c > +++ b/drivers/gpu/drm/drm_prime.c > @@ -802,7 +802,8 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = { > * > * This is useful for implementing &drm_gem_object_funcs.get_sg_table. > */ > -struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages) > +struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages, > + size_t max_segment) > { > struct sg_table *sg = NULL; > int ret; > @@ -813,8 +814,11 @@ struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_page > goto out; > } > > - ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0, > - nr_pages << PAGE_SHIFT, GFP_KERNEL); > + if (max_segment == 0 || max_segment > SCATTERLIST_MAX_SEGMENT) > + max_segment = SCATTERLIST_MAX_SEGMENT; > + ret = __sg_alloc_table_from_pages(sg, pages, nr_pages, 0, > + nr_pages << PAGE_SHIFT, > + max_segment, GFP_KERNEL); > if (ret) > goto out; > > diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c > index f06e19e7be04..90654246b335 100644 > --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c > +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c > @@ -103,7 +103,8 @@ struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) > int npages = etnaviv_obj->base.size >> PAGE_SHIFT; > struct sg_table *sgt; > > - sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); > + sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages, > + etnaviv_obj->base.dev->max_segment); > if (IS_ERR(sgt)) { > dev_err(dev->dev, "failed to allocate sgt: %ld\n", > PTR_ERR(sgt)); > diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c > index 6d9e5c3c4dd5..f65be0fffb3d 100644 > --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c > +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c > @@ -19,7 +19,8 @@ struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) > if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ > return ERR_PTR(-EINVAL); > > - return drm_prime_pages_to_sg(etnaviv_obj->pages, npages); > + return drm_prime_pages_to_sg(etnaviv_obj->pages, npages, > + obj->dev->max_segment); > } > > void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c > index b2f49152b4d4..dbf1437c3dac 100644 > --- a/drivers/gpu/drm/msm/msm_gem.c > +++ b/drivers/gpu/drm/msm/msm_gem.c > @@ -126,7 +126,8 @@ static struct page **get_pages(struct drm_gem_object *obj) > > msm_obj->pages = p; > > - msm_obj->sgt = drm_prime_pages_to_sg(p, npages); > + msm_obj->sgt = drm_prime_pages_to_sg(p, npages, > + obj->dev->max_segment); > if (IS_ERR(msm_obj->sgt)) { > void *ptr = ERR_CAST(msm_obj->sgt); > > diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c > index d7c8948427fe..6337cd1f9428 100644 > --- a/drivers/gpu/drm/msm/msm_gem_prime.c > +++ b/drivers/gpu/drm/msm/msm_gem_prime.c > @@ -19,7 +19,8 @@ struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj) > if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */ > return NULL; > > - return drm_prime_pages_to_sg(msm_obj->pages, npages); > + return drm_prime_pages_to_sg(msm_obj->pages, npages, > + obj->dev->max_segment); > } > > void *msm_gem_prime_vmap(struct drm_gem_object *obj) > diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c > index bae6a3eccee0..dd0ff032ae16 100644 > --- a/drivers/gpu/drm/nouveau/nouveau_prime.c > +++ b/drivers/gpu/drm/nouveau/nouveau_prime.c > @@ -32,7 +32,8 @@ struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj) > struct nouveau_bo *nvbo = nouveau_gem_object(obj); > int npages = nvbo->bo.num_pages; > > - return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages); > + return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages, > + obj->dev->max_segment); > } > > void *nouveau_gem_prime_vmap(struct drm_gem_object *obj) > diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c > index b906e8fbd5f3..61a3fe147489 100644 > --- a/drivers/gpu/drm/radeon/radeon_prime.c > +++ b/drivers/gpu/drm/radeon/radeon_prime.c > @@ -36,7 +36,8 @@ struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) > struct radeon_bo *bo = gem_to_radeon_bo(obj); > int npages = bo->tbo.num_pages; > > - return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); > + return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages, > + obj->dev->max_segment); > } > > void *radeon_gem_prime_vmap(struct drm_gem_object *obj) > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c > index b9275ba7c5a5..5ddb2d31a607 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c > @@ -85,7 +85,8 @@ static int rockchip_gem_get_pages(struct rockchip_gem_object *rk_obj) > > rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT; > > - rk_obj->sgt = drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages); > + rk_obj->sgt = drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages, > + rk_obj->base.dev->max_segment); > if (IS_ERR(rk_obj->sgt)) { > ret = PTR_ERR(rk_obj->sgt); > goto err_put_pages; > @@ -442,7 +443,8 @@ struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj) > int ret; > > if (rk_obj->pages) > - return drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages); > + return drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages, > + obj->dev->max_segment); > > sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); > if (!sgt) > diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c > index 723df142a981..a0abde747e95 100644 > --- a/drivers/gpu/drm/tegra/gem.c > +++ b/drivers/gpu/drm/tegra/gem.c > @@ -284,7 +284,8 @@ static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo) > > bo->num_pages = bo->gem.size >> PAGE_SHIFT; > > - bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages); > + bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages, > + bo->gem.dev->max_segment); > if (IS_ERR(bo->sgt)) { > err = PTR_ERR(bo->sgt); > goto put_pages; > diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c > index 313339bbff90..045461dc6319 100644 > --- a/drivers/gpu/drm/vgem/vgem_drv.c > +++ b/drivers/gpu/drm/vgem/vgem_drv.c > @@ -321,7 +321,8 @@ static struct sg_table *vgem_prime_get_sg_table(struct drm_gem_object *obj) > { > struct drm_vgem_gem_object *bo = to_vgem_bo(obj); > > - return drm_prime_pages_to_sg(bo->pages, bo->base.size >> PAGE_SHIFT); > + return drm_prime_pages_to_sg(bo->pages, bo->base.size >> PAGE_SHIFT, > + obj->dev->max_segment); > } > > static struct drm_gem_object* vgem_prime_import(struct drm_device *dev, > diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c > index f0b85e094111..61a8c1a9fb04 100644 > --- a/drivers/gpu/drm/xen/xen_drm_front_gem.c > +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c > @@ -179,7 +179,8 @@ struct sg_table *xen_drm_front_gem_get_sg_table(struct drm_gem_object *gem_obj) > if (!xen_obj->pages) > return ERR_PTR(-ENOMEM); > > - return drm_prime_pages_to_sg(xen_obj->pages, xen_obj->num_pages); > + return drm_prime_pages_to_sg(xen_obj->pages, xen_obj->num_pages, > + gem_obj->dev->max_segment); > } > > struct drm_gem_object * > -- > 2.18.4 >-- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
Gerd Hoffmann
2020-Sep-07 06:39 UTC
[Nouveau] [PATCH v2 1/2] drm: allow limiting the scatter list size.
> > + /** > > + * @max_segment: > > + * > > + * Max size for scatter list segments. When unset the default > > + * (SCATTERLIST_MAX_SEGMENT) is used. > > + */ > > + size_t max_segment; > > Is there no better place for this then "at the bottom"? drm_device is a > huge structure, piling stuff up randomly doesn't make it better :-)Moved next to the other gem fields for now (v3 posted).> I think ideally we'd have a gem substruct like we have on the modeset side > at least.Phew, that'll be quite some churn in the tree. And there aren't that many gem-related fields in struct drm_device. So you are looking for something like below (header changes only)? take care, Gerd diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index c455ef404ca6..950167ede98a 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -299,22 +299,8 @@ struct drm_device { /** @mode_config: Current mode config */ struct drm_mode_config mode_config; - /** @object_name_lock: GEM information */ - struct mutex object_name_lock; - - /** @object_name_idr: GEM information */ - struct idr object_name_idr; - - /** @vma_offset_manager: GEM information */ - struct drm_vma_offset_manager *vma_offset_manager; - - /** - * @max_segment: - * - * Max size for scatter list segments for GEM objects. When - * unset the default (SCATTERLIST_MAX_SEGMENT) is used. - */ - size_t max_segment; + /** @gem_config: Current GEM config */ + struct drm_gem_config gem_config; /** @vram_mm: VRAM MM memory manager */ struct drm_vram_mm *vram_mm; diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 337a48321705..74129fb29fb8 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -39,6 +39,25 @@ #include <drm/drm_vma_manager.h> +struct drm_gem_config { + /** @object_name_lock: GEM information */ + struct mutex object_name_lock; + + /** @object_name_idr: GEM information */ + struct idr object_name_idr; + + /** @vma_offset_manager: GEM information */ + struct drm_vma_offset_manager *vma_offset_manager; + + /** + * @max_segment: + * + * Max size for scatter list segments for GEM objects. When + * unset the default (SCATTERLIST_MAX_SEGMENT) is used. + */ + size_t max_segment; +}; + struct drm_gem_object; /**
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