summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/drm_cache.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/drm_cache.c')
-rw-r--r--drivers/gpu/drm/drm_cache.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
index ec4698246213..a575cb2e6bdb 100644
--- a/drivers/gpu/drm/drm_cache.c
+++ b/drivers/gpu/drm/drm_cache.c
@@ -37,12 +37,13 @@ drm_clflush_page(struct page *page)
{
uint8_t *page_virtual;
unsigned int i;
+ const int size = boot_cpu_data.x86_clflush_size;
if (unlikely(page == NULL))
return;
page_virtual = kmap_atomic(page);
- for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
+ for (i = 0; i < PAGE_SIZE; i += size)
clflush(page_virtual + i);
kunmap_atomic(page_virtual);
}
@@ -100,6 +101,31 @@ drm_clflush_pages(struct page *pages[], unsigned long num_pages)
EXPORT_SYMBOL(drm_clflush_pages);
void
+drm_clflush_sg(struct sg_table *st)
+{
+#if defined(CONFIG_X86)
+ if (cpu_has_clflush) {
+ struct scatterlist *sg;
+ int i;
+
+ mb();
+ for_each_sg(st->sgl, sg, st->nents, i)
+ drm_clflush_page(sg_page(sg));
+ mb();
+
+ return;
+ }
+
+ if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
+ printk(KERN_ERR "Timed out waiting for cache flush.\n");
+#else
+ printk(KERN_ERR "Architecture has no drm_cache.c support\n");
+ WARN_ON_ONCE(1);
+#endif
+}
+EXPORT_SYMBOL(drm_clflush_sg);
+
+void
drm_clflush_virt_range(char *addr, unsigned long length)
{
#if defined(CONFIG_X86)