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 void lowlevel_buffer_deallocate(struct drm_device *dev,
unsigned int flags, struct rockchip_drm_gem_buf *buf)
{
DRM_DEBUG_KMS("%s.\n", __FILE__);
if (!buf->dma_addr) {
DRM_DEBUG_KMS("dma_addr is invalid.\n");
return;
}
DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n",
(unsigned long)buf->dma_addr,
buf->size);
sg_free_table(buf->sgt);
kfree(buf->sgt);
buf->sgt = NULL;
if (!is_drm_iommu_supported(dev)) {
dma_free_attrs(dev->dev, buf->size, buf->kvaddr,
(dma_addr_t)buf->dma_addr, &buf->dma_attrs);
kfree(buf->pages);
} else
dma_free_attrs(dev->dev, buf->size, buf->pages,
(dma_addr_t)buf->dma_addr, &buf->dma_attrs);
buf->dma_addr = (dma_addr_t)NULL;
}
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 lowlevel_buffer_allocate(struct drm_device *dev,
unsigned int flags, struct rockchip_drm_gem_buf *buf)
{
int ret = 0;
enum dma_attr attr;
unsigned int nr_pages;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (buf->dma_addr) {
DRM_DEBUG_KMS("already allocated.\n");
return 0;
}
init_dma_attrs(&buf->dma_attrs);
/*
* if ROCKCHIP_BO_CONTIG, fully physically contiguous memory
* region will be allocated else physically contiguous
* as possible.
*/
if (!(flags & ROCKCHIP_BO_NONCONTIG))
dma_set_attr(DMA_ATTR_FORCE_CONTIGUOUS, &buf->dma_attrs);
/*
* if ROCKCHIP_BO_WC or ROCKCHIP_BO_NONCACHABLE, writecombine mapping
* else cachable mapping.
*/
if (flags & ROCKCHIP_BO_WC || !(flags & ROCKCHIP_BO_CACHABLE))
attr = DMA_ATTR_WRITE_COMBINE;
else
attr = DMA_ATTR_NON_CONSISTENT;
dma_set_attr(attr, &buf->dma_attrs);
dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &buf->dma_attrs);
nr_pages = buf->size >> PAGE_SHIFT;
if (!is_drm_iommu_supported(dev)) {
dma_addr_t start_addr;
unsigned int i = 0;
buf->pages = kzalloc(sizeof(struct page) * nr_pages,
GFP_KERNEL);
if (!buf->pages) {
DRM_ERROR("failed to allocate pages.\n");
return -ENOMEM;
}
buf->kvaddr = dma_alloc_attrs(dev->dev, buf->size,
&buf->dma_addr, GFP_KERNEL,
&buf->dma_attrs);
if (!buf->kvaddr) {
DRM_ERROR("failed to allocate buffer.\n");
kfree(buf->pages);
return -ENOMEM;
}
start_addr = buf->dma_addr;
while (i < nr_pages) {
buf->pages[i] = phys_to_page(start_addr);
start_addr += PAGE_SIZE;
i++;
}
} else {
buf->pages = dma_alloc_attrs(dev->dev, buf->size,
&buf->dma_addr, GFP_KERNEL,
&buf->dma_attrs);
if (!buf->pages) {
DRM_ERROR("failed to allocate buffer.\n");
return -ENOMEM;
}
}
buf->sgt = drm_prime_pages_to_sg(buf->pages, nr_pages);
if (!buf->sgt) {
DRM_ERROR("failed to get sg table.\n");
ret = -ENOMEM;
goto err_free_attrs;
}
DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n",
(unsigned long)buf->dma_addr,
buf->size);
return ret;
err_free_attrs:
dma_free_attrs(dev->dev, buf->size, buf->pages,
(dma_addr_t)buf->dma_addr, &buf->dma_attrs);
buf->dma_addr = (dma_addr_t)NULL;
if (!is_drm_iommu_supported(dev))
kfree(buf->pages);
return ret;
}
