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drm/etnaviv: allow to request specific virtual address for gem mapping 

Allow the mapping code to request a specific virtual address for the gem
mapping. If the virtual address is zero we fall back to the old mode of
allocating a virtual address for the mapping.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
This commit is contained in:
Lucas Stach 2019-08-02 14:19:38 +02:00
parent edb5ff07ef
commit 17eae23b08
4 changed files with 19 additions and 5 deletions
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3
drivers/gpu/drm/etnaviv/etnaviv_gem.c
View File

@ -308,7 +308,8 @@ struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
mapping->use = 1;
ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj,
mmu_context->global->memory_base, mapping);
mmu_context->global->memory_base,
mapping, 0);
if (ret < 0) {
etnaviv_iommu_context_put(mmu_context);
kfree(mapping);

3
drivers/gpu/drm/etnaviv/etnaviv_gem.h
View File

@ -120,7 +120,8 @@ struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context);
struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context,
u64 va);
void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
#endif /* __ETNAVIV_GEM_H__ */

16
drivers/gpu/drm/etnaviv/etnaviv_mmu.c
View File

@ -220,9 +220,16 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu_context *context,
return ret;
}
static int etnaviv_iommu_insert_exact(struct etnaviv_iommu_context *context,
struct drm_mm_node *node, size_t size, u64 va)
{
return drm_mm_insert_node_in_range(&context->mm, node, size, 0, 0, va,
va + size, DRM_MM_INSERT_LOWEST);
}
int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
struct etnaviv_vram_mapping *mapping)
struct etnaviv_vram_mapping *mapping, u64 va)
{
struct sg_table *sgt = etnaviv_obj->sgt;
struct drm_mm_node *node;
@ -248,7 +255,12 @@ int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
node = &mapping->vram_node;
ret = etnaviv_iommu_find_iova(context, node, etnaviv_obj->base.size);
if (va)
ret = etnaviv_iommu_insert_exact(context, node,
etnaviv_obj->base.size, va);
else
ret = etnaviv_iommu_find_iova(context, node,
etnaviv_obj->base.size);
if (ret < 0)
goto unlock;

2
drivers/gpu/drm/etnaviv/etnaviv_mmu.h
View File

@ -88,7 +88,7 @@ struct etnaviv_gem_object;
int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
struct etnaviv_vram_mapping *mapping);
struct etnaviv_vram_mapping *mapping, u64 va);
void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context,
struct etnaviv_vram_mapping *mapping);