diff options
| -rw-r--r-- | drivers/gpu/drm/drm_cache.c | 32 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_memory.c | 33 |
2 files changed, 32 insertions, 33 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index 0fe3c496002a..49551a7fa22f 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -30,6 +30,7 @@ #include <linux/export.h> #include <linux/highmem.h> +#include <xen/xen.h> #include <drm/drm_cache.h> @@ -176,3 +177,34 @@ drm_clflush_virt_range(void *addr, unsigned long length) #endif } EXPORT_SYMBOL(drm_clflush_virt_range); + +bool drm_need_swiotlb(int dma_bits) +{ + struct resource *tmp; + resource_size_t max_iomem = 0; + + /* + * Xen paravirtual hosts require swiotlb regardless of requested dma + * transfer size. + * + * NOTE: Really, what it requires is use of the dma_alloc_coherent + * allocator used in ttm_dma_populate() instead of + * ttm_populate_and_map_pages(), which bounce buffers so much in + * Xen it leads to swiotlb buffer exhaustion. + */ + if (xen_pv_domain()) + return true; + + /* + * Enforce dma_alloc_coherent when memory encryption is active as well + * for the same reasons as for Xen paravirtual hosts. + */ + if (mem_encrypt_active()) + return true; + + for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) + max_iomem = max(max_iomem, tmp->end); + + return max_iomem > ((u64)1 << dma_bits); +} +EXPORT_SYMBOL(drm_need_swiotlb); diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c index f4f2bffdd5bd..e4f20a2eb6e7 100644 --- a/drivers/gpu/drm/drm_memory.c +++ b/drivers/gpu/drm/drm_memory.c @@ -37,7 +37,6 @@ #include <linux/highmem.h> #include <linux/pci.h> #include <linux/vmalloc.h> -#include <xen/xen.h> #include <drm/drm_agpsupport.h> #include <drm/drm_cache.h> @@ -138,35 +137,3 @@ void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev) iounmap(map->handle); } EXPORT_SYMBOL(drm_legacy_ioremapfree); - -bool drm_need_swiotlb(int dma_bits) -{ - struct resource *tmp; - resource_size_t max_iomem = 0; - - /* - * Xen paravirtual hosts require swiotlb regardless of requested dma - * transfer size. - * - * NOTE: Really, what it requires is use of the dma_alloc_coherent - * allocator used in ttm_dma_populate() instead of - * ttm_populate_and_map_pages(), which bounce buffers so much in - * Xen it leads to swiotlb buffer exhaustion. - */ - if (xen_pv_domain()) - return true; - - /* - * Enforce dma_alloc_coherent when memory encryption is active as well - * for the same reasons as for Xen paravirtual hosts. - */ - if (mem_encrypt_active()) - return true; - - for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) { - max_iomem = max(max_iomem, tmp->end); - } - - return max_iomem > ((u64)1 << dma_bits); -} -EXPORT_SYMBOL(drm_need_swiotlb); |