Merge tag 'v5.11-rc1' into regulator-5.11

Linux 5.11-rc1

1 files changed, 10 insertions, 8 deletions

diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 957b398d30e5..cf72699cb2bc 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -13,6 +13,7 @@
 #ifndef __DMA_BUF_H__
 #define __DMA_BUF_H__
 
+#include <linux/dma-buf-map.h>
 #include <linux/file.h>
 #include <linux/err.h>
 #include <linux/scatterlist.h>
@@ -145,7 +146,8 @@ struct dma_buf_ops {
 	 *
 	 * A &sg_table scatter list of or the backing storage of the DMA buffer,
 	 * already mapped into the device address space of the &device attached
-	 * with the provided &dma_buf_attachment.
+	 * with the provided &dma_buf_attachment. The addresses and lengths in
+	 * the scatter list are PAGE_SIZE aligned.
 	 *
 	 * On failure, returns a negative error value wrapped into a pointer.
 	 * May also return -EINTR when a signal was received while being
@@ -265,13 +267,13 @@ struct dma_buf_ops {
 	 */
 	int (*mmap)(struct dma_buf *, struct vm_area_struct *vma);
 
-	void *(*vmap)(struct dma_buf *);
-	void (*vunmap)(struct dma_buf *, void *vaddr);
+	int (*vmap)(struct dma_buf *dmabuf, struct dma_buf_map *map);
+	void (*vunmap)(struct dma_buf *dmabuf, struct dma_buf_map *map);
 };
 
 /**
  * struct dma_buf - shared buffer object
- * @size: size of the buffer
+ * @size: size of the buffer; invariant over the lifetime of the buffer.
  * @file: file pointer used for sharing buffers across, and for refcounting.
  * @attachments: list of dma_buf_attachment that denotes all devices attached,
  *               protected by dma_resv lock.
@@ -309,7 +311,7 @@ struct dma_buf {
 	const struct dma_buf_ops *ops;
 	struct mutex lock;
 	unsigned vmapping_counter;
-	void *vmap_ptr;
+	struct dma_buf_map vmap_ptr;
 	const char *exp_name;
 	const char *name;
 	spinlock_t name_lock;
@@ -403,7 +405,7 @@ struct dma_buf_attachment {
  * @exp_name:	name of the exporter - useful for debugging.
  * @owner:	pointer to exporter module - used for refcounting kernel module
  * @ops:	Attach allocator-defined dma buf ops to the new buffer
- * @size:	Size of the buffer
+ * @size:	Size of the buffer - invariant over the lifetime of the buffer
  * @flags:	mode flags for the file
  * @resv:	reservation-object, NULL to allocate default one
  * @priv:	Attach private data of allocator to this buffer
@@ -502,6 +504,6 @@ int dma_buf_end_cpu_access(struct dma_buf *dma_buf,
 
 int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
 		 unsigned long);
-void *dma_buf_vmap(struct dma_buf *);
-void dma_buf_vunmap(struct dma_buf *, void *vaddr);
+int dma_buf_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map);
+void dma_buf_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map);
 #endif /* __DMA_BUF_H__ */