msm: kgsl: Create scatter gather lists for memory objects
Create and use scatter-gather lists for memory objects, which
avoids dynamically figuring the physical addresses of pages for
MMU mapping and cache operations.
Change-Id: Ic0dedbad9b973ecce4ae773b6bd682ba01010e5b
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_sharedmem.h b/drivers/gpu/msm/kgsl_sharedmem.h
index 9e57e78..a9abcf9 100644
--- a/drivers/gpu/msm/kgsl_sharedmem.h
+++ b/drivers/gpu/msm/kgsl_sharedmem.h
@@ -13,6 +13,7 @@
#ifndef __KGSL_SHAREDMEM_H
#define __KGSL_SHAREDMEM_H
+#include <linux/slab.h>
#include <linux/dma-mapping.h>
struct kgsl_device;
@@ -26,8 +27,6 @@
#define KGSL_MEMFLAGS_CACHED 0x00000001
struct kgsl_memdesc_ops {
- unsigned long (*physaddr)(struct kgsl_memdesc *, unsigned int);
- void (*outer_cache)(struct kgsl_memdesc *, int);
int (*vmflags)(struct kgsl_memdesc *);
int (*vmfault)(struct kgsl_memdesc *, struct vm_area_struct *,
struct vm_fault *);
@@ -35,8 +34,6 @@
};
extern struct kgsl_memdesc_ops kgsl_vmalloc_ops;
-extern struct kgsl_memdesc_ops kgsl_contiguous_ops;
-extern struct kgsl_memdesc_ops kgsl_userptr_ops;
int kgsl_sharedmem_vmalloc(struct kgsl_memdesc *memdesc,
struct kgsl_pagetable *pagetable, size_t size);
@@ -78,6 +75,22 @@
void kgsl_sharedmem_uninit_sysfs(void);
static inline int
+memdesc_sg_phys(struct kgsl_memdesc *memdesc,
+ unsigned int physaddr, unsigned int size)
+{
+ struct page *page = phys_to_page(physaddr);
+
+ memdesc->sg = kmalloc(sizeof(struct scatterlist) * 1, GFP_KERNEL);
+ if (memdesc->sg == NULL)
+ return -ENOMEM;
+
+ memdesc->sglen = 1;
+ sg_init_table(memdesc->sg, 1);
+ sg_set_page(&memdesc->sg[0], page, size, 0);
+ return 0;
+}
+
+static inline int
kgsl_allocate(struct kgsl_memdesc *memdesc,
struct kgsl_pagetable *pagetable, size_t size)
{