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drm/rockchip: gem: add dma buffer map to iommu

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for some scene we need to alloc continue buffer from dma buffer,
but vop iommu is still enable, so we add iommu map for dma buffer.

Change-Id: I4749eac53609f865d0d4230364b1cbaf39ee095a
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
This commit is contained in:
Sandy Huang
2019-12-16 19:30:05 +08:00
committed by Tao Huang
parent ec250395a3
commit f17edd2d3b
1 changed files with 111 additions and 48 deletions
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159
drivers/gpu/drm/rockchip/rockchip_drm_gem.c
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@@ -240,44 +240,17 @@ static void rockchip_gem_put_pages(struct rockchip_gem_object *rk_obj)
drm_gem_put_pages(&rk_obj->base, rk_obj->pages, true, true);
}
static int rockchip_gem_alloc_iommu(struct rockchip_gem_object *rk_obj,
bool alloc_kmap)
{
int ret;
ret = rockchip_gem_get_pages(rk_obj);
if (ret < 0)
return ret;
ret = rockchip_gem_iommu_map(rk_obj);
if (ret < 0)
goto err_free;
if (alloc_kmap) {
rk_obj->kvaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP,
pgprot_writecombine(PAGE_KERNEL));
if (!rk_obj->kvaddr) {
DRM_ERROR("failed to vmap() buffer\n");
ret = -ENOMEM;
goto err_unmap;
}
}
return 0;
err_unmap:
rockchip_gem_iommu_unmap(rk_obj);
err_free:
rockchip_gem_put_pages(rk_obj);
return ret;
}
static inline void *drm_calloc_large(size_t nmemb, size_t size);
static inline void drm_free_large(void *ptr);
static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj);
static int rockchip_gem_alloc_dma(struct rockchip_gem_object *rk_obj,
bool alloc_kmap)
{
struct drm_gem_object *obj = &rk_obj->base;
struct drm_device *drm = obj->dev;
struct sg_table *sgt;
int ret, i;
struct scatterlist *s;
rk_obj->dma_attrs = DMA_ATTR_WRITE_COMBINE;
@@ -285,14 +258,61 @@ static int rockchip_gem_alloc_dma(struct rockchip_gem_object *rk_obj,
rk_obj->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size,
&rk_obj->dma_addr, GFP_KERNEL,
&rk_obj->dma_handle, GFP_KERNEL,
rk_obj->dma_attrs);
if (!rk_obj->kvaddr) {
DRM_ERROR("failed to allocate %zu byte dma buffer", obj->size);
return -ENOMEM;
}
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
if (!sgt) {
ret = -ENOMEM;
goto err_dma_free;
}
ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
rk_obj->dma_handle, obj->size,
rk_obj->dma_attrs);
if (ret) {
DRM_ERROR("failed to allocate sgt, %d\n", ret);
goto err_sgt_free;
}
for_each_sg(sgt->sgl, s, sgt->nents, i)
sg_dma_address(s) = sg_phys(s);
rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
rk_obj->pages = drm_calloc_large(rk_obj->num_pages,
sizeof(*rk_obj->pages));
if (!rk_obj->pages) {
DRM_ERROR("failed to allocate pages.\n");
goto err_sg_table_free;
}
if (drm_prime_sg_to_page_addr_arrays(sgt, rk_obj->pages, NULL,
rk_obj->num_pages)) {
DRM_ERROR("invalid sgtable.\n");
ret = -EINVAL;
goto err_page_free;
}
rk_obj->sgt = sgt;
return 0;
err_page_free:
drm_free_large(rk_obj->pages);
err_sg_table_free:
sg_free_table(sgt);
err_sgt_free:
kfree(sgt);
err_dma_free:
dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr,
rk_obj->dma_addr, rk_obj->dma_attrs);
return ret;
}
static inline void *drm_calloc_large(size_t nmemb, size_t size)
@@ -386,6 +406,7 @@ static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
struct drm_gem_object *obj = &rk_obj->base;
struct drm_device *drm = obj->dev;
struct rockchip_drm_private *private = drm->dev_private;
int ret = 0;
if (!private->domain)
rk_obj->flags |= ROCKCHIP_BO_CONTIG;
@@ -397,21 +418,53 @@ static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
DRM_ERROR("Not allow alloc secure buffer with kmap\n");
return -EINVAL;
}
return rockchip_gem_alloc_secure(rk_obj);
ret = rockchip_gem_alloc_secure(rk_obj);
if (ret)
return ret;
} else if (rk_obj->flags & ROCKCHIP_BO_CONTIG) {
rk_obj->buf_type = ROCKCHIP_GEM_BUF_TYPE_CMA;
return rockchip_gem_alloc_dma(rk_obj, alloc_kmap);
ret = rockchip_gem_alloc_dma(rk_obj, alloc_kmap);
if (ret)
return ret;
} else {
rk_obj->buf_type = ROCKCHIP_GEM_BUF_TYPE_SHMEM;
return rockchip_gem_alloc_iommu(rk_obj, alloc_kmap);
ret = rockchip_gem_get_pages(rk_obj);
if (ret < 0)
return ret;
}
}
static void rockchip_gem_free_iommu(struct rockchip_gem_object *rk_obj)
{
vunmap(rk_obj->kvaddr);
rockchip_gem_iommu_unmap(rk_obj);
rockchip_gem_put_pages(rk_obj);
if (private->domain) {
ret = rockchip_gem_iommu_map(rk_obj);
if (ret < 0)
goto err_free;
} else {
WARN_ON(!rk_obj->dma_handle);
rk_obj->dma_addr = rk_obj->dma_handle;
}
if (alloc_kmap) {
rk_obj->kvaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP,
pgprot_writecombine(PAGE_KERNEL));
if (!rk_obj->kvaddr) {
DRM_ERROR("failed to vmap() buffer\n");
ret = -ENOMEM;
goto err_iommu_free;
}
}
return 0;
err_iommu_free:
if (private->domain)
rockchip_gem_iommu_unmap(rk_obj);
err_free:
if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SECURE)
rockchip_gem_free_secure(rk_obj);
else if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_CMA)
rockchip_gem_free_dma(rk_obj);
else
rockchip_gem_put_pages(rk_obj);
return ret;
}
static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj)
@@ -419,16 +472,26 @@ static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj)
struct drm_gem_object *obj = &rk_obj->base;
struct drm_device *drm = obj->dev;
dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr, rk_obj->dma_addr,
rk_obj->dma_attrs);
drm_free_large(rk_obj->pages);
sg_free_table(rk_obj->sgt);
kfree(rk_obj->sgt);
dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr,
rk_obj->dma_handle, rk_obj->dma_attrs);
}
static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj)
{
if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SECURE)
struct drm_device *drm = rk_obj->base.dev;
struct rockchip_drm_private *private = drm->dev_private;
vunmap(rk_obj->kvaddr);
if (private->domain)
rockchip_gem_iommu_unmap(rk_obj);
if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SHMEM)
rockchip_gem_put_pages(rk_obj);
else if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SECURE)
rockchip_gem_free_secure(rk_obj);
else if (rk_obj->pages)
rockchip_gem_free_iommu(rk_obj);
else
rockchip_gem_free_dma(rk_obj);
}