static int check_fb_gem_memory_type(struct drm_device *drm_dev,
struct exynos_drm_gem_obj *exynos_gem_obj)
{
unsigned int flags;
/*
* if exynos drm driver supports iommu then framebuffer can use
* all the buffer types.
*/
if (is_drm_iommu_supported(drm_dev))
return 0;
flags = exynos_gem_obj->flags;
/*
* without iommu support, not support physically non-continuous memory
* for framebuffer.
*/
if (IS_NONCONTIG_BUFFER(flags)) {
DRM_ERROR("cannot use this gem memory type for fb.\n");
return -EINVAL;
}
return 0;
}
static int check_fb_gem_memory_type(struct drm_device *drm_dev,
struct exynos_drm_gem *exynos_gem)
{
unsigned int flags;
/*
* if exynos drm driver supports iommu then framebuffer can use
* all the buffer types.
*/
if (is_drm_iommu_supported(drm_dev))
return 0;
flags = exynos_gem->flags;
/*
* Physically non-contiguous memory type for framebuffer is not
* supported without IOMMU.
*/
if (IS_NONCONTIG_BUFFER(flags)) {
DRM_ERROR("Non-contiguous GEM memory is not supported.\n");
return -EINVAL;
}
return 0;
}
static int exynos_drm_ump_add_buffer(void *obj,
unsigned int *handle, unsigned int *id)
{
struct exynos_drm_gem_obj *gem_obj = obj;
struct exynos_drm_gem_buf *buf = gem_obj->buffer;
ump_dd_physical_block *ump_mem_desc;
unsigned int nblocks;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (IS_NONCONTIG_BUFFER(gem_obj->flags)) {
unsigned int i = 0;
if (!buf->pages)
return -EFAULT;
nblocks = gem_obj->size >> PAGE_SHIFT;
ump_mem_desc = kzalloc(sizeof(*ump_mem_desc) * nblocks,
GFP_KERNEL);
if (!ump_mem_desc) {
DRM_ERROR("failed to alloc ump_mem_desc.\n");
return -ENOMEM;
}
/*
* if EXYNOS_BO_NONCONTIG type, gem object would already
* have pages allocated by gem creation so contain page
* frame numbers of all pages into ump descriptors.
*/
while (i < nblocks) {
ump_mem_desc[i].addr =
page_to_pfn(buf->pages[i]) << PAGE_SHIFT;
ump_mem_desc[i].size = PAGE_SIZE;
i++;
}
} else {
static int lowlevel_buffer_allocate(struct drm_device *dev,
unsigned int flags, struct exynos_drm_gem_buf *buf)
{
dma_addr_t start_addr;
unsigned int npages, page_size, i = 0;
struct scatterlist *sgl;
int ret = 0;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (IS_NONCONTIG_BUFFER(flags)) {
DRM_DEBUG_KMS("not support allocation type.\n");
return -EINVAL;
}
if (buf->dma_addr) {
DRM_DEBUG_KMS("already allocated.\n");
return 0;
}
if (buf->size >= SZ_1M) {
npages = buf->size >> SECTION_SHIFT;
page_size = SECTION_SIZE;
} else if (buf->size >= SZ_64K) {
