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path: root/drivers/misc/genwqe/card_base.h
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Diffstat (limited to 'drivers/misc/genwqe/card_base.h')
-rw-r--r--drivers/misc/genwqe/card_base.h58
1 files changed, 39 insertions, 19 deletions
diff --git a/drivers/misc/genwqe/card_base.h b/drivers/misc/genwqe/card_base.h
index 5e4dbd21f89a..0e608a288603 100644
--- a/drivers/misc/genwqe/card_base.h
+++ b/drivers/misc/genwqe/card_base.h
@@ -337,6 +337,44 @@ enum genwqe_requ_state {
};
/**
+ * struct genwqe_sgl - Scatter gather list describing user-space memory
+ * @sgl: scatter gather list needs to be 128 byte aligned
+ * @sgl_dma_addr: dma address of sgl
+ * @sgl_size: size of area used for sgl
+ * @user_addr: user-space address of memory area
+ * @user_size: size of user-space memory area
+ * @page: buffer for partial pages if needed
+ * @page_dma_addr: dma address partial pages
+ */
+struct genwqe_sgl {
+ dma_addr_t sgl_dma_addr;
+ struct sg_entry *sgl;
+ size_t sgl_size; /* size of sgl */
+
+ void __user *user_addr; /* user-space base-address */
+ size_t user_size; /* size of memory area */
+
+ unsigned long nr_pages;
+ unsigned long fpage_offs;
+ size_t fpage_size;
+ size_t lpage_size;
+
+ void *fpage;
+ dma_addr_t fpage_dma_addr;
+
+ void *lpage;
+ dma_addr_t lpage_dma_addr;
+};
+
+int genwqe_alloc_sync_sgl(struct genwqe_dev *cd, struct genwqe_sgl *sgl,
+ void __user *user_addr, size_t user_size);
+
+int genwqe_setup_sgl(struct genwqe_dev *cd, struct genwqe_sgl *sgl,
+ dma_addr_t *dma_list);
+
+int genwqe_free_sync_sgl(struct genwqe_dev *cd, struct genwqe_sgl *sgl);
+
+/**
* struct ddcb_requ - Kernel internal representation of the DDCB request
* @cmd: User space representation of the DDCB execution request
*/
@@ -347,9 +385,7 @@ struct ddcb_requ {
struct ddcb_queue *queue; /* associated queue */
struct dma_mapping dma_mappings[DDCB_FIXUPS];
- struct sg_entry *sgl[DDCB_FIXUPS];
- dma_addr_t sgl_dma_addr[DDCB_FIXUPS];
- size_t sgl_size[DDCB_FIXUPS];
+ struct genwqe_sgl sgls[DDCB_FIXUPS];
/* kernel/user shared content */
struct genwqe_ddcb_cmd cmd; /* ddcb_no for this request */
@@ -453,22 +489,6 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m,
int genwqe_user_vunmap(struct genwqe_dev *cd, struct dma_mapping *m,
struct ddcb_requ *req);
-struct sg_entry *genwqe_alloc_sgl(struct genwqe_dev *cd, int num_pages,
- dma_addr_t *dma_addr, size_t *sgl_size);
-
-void genwqe_free_sgl(struct genwqe_dev *cd, struct sg_entry *sg_list,
- dma_addr_t dma_addr, size_t size);
-
-int genwqe_setup_sgl(struct genwqe_dev *cd,
- unsigned long offs,
- unsigned long size,
- struct sg_entry *sgl, /* genwqe sgl */
- dma_addr_t dma_addr, size_t sgl_size,
- dma_addr_t *dma_list, int page_offs, int num_pages);
-
-int genwqe_check_sgl(struct genwqe_dev *cd, struct sg_entry *sg_list,
- int size);
-
static inline bool dma_mapping_used(struct dma_mapping *m)
{
if (!m)