drm/ttm: consolidate cache flushing code in one place.
This merges the TTM and drm cache flushing into one file in the
drm core.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
index 0e994a0..3a5575e 100644
--- a/drivers/gpu/drm/drm_cache.c
+++ b/drivers/gpu/drm/drm_cache.c
@@ -45,25 +45,58 @@
clflush(page_virtual + i);
kunmap_atomic(page_virtual, KM_USER0);
}
-#endif
+static void drm_cache_flush_clflush(struct page *pages[],
+ unsigned long num_pages)
+{
+ unsigned long i;
+
+ mb();
+ for (i = 0; i < num_pages; i++)
+ drm_clflush_page(*pages++);
+ mb();
+}
+
+static void
+drm_clflush_ipi_handler(void *null)
+{
+ wbinvd();
+}
+#elif !defined(__powerpc__)
+static void drm_cache_ipi_handler(void *dummy)
+{
+}
+#endif
void
drm_clflush_pages(struct page *pages[], unsigned long num_pages)
{
#if defined(CONFIG_X86)
if (cpu_has_clflush) {
- unsigned long i;
-
- mb();
- for (i = 0; i < num_pages; ++i)
- drm_clflush_page(*pages++);
- mb();
-
+ drm_cache_flush_clflush(pages, num_pages);
return;
}
- wbinvd();
+ if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
+ printk(KERN_ERR "Timed out waiting for cache flush.\n");
+
+#elif defined(__powerpc__)
+ unsigned long i;
+ for (i = 0; i < num_pages; i++) {
+ struct page *page = pages[i];
+ void *page_virtual;
+
+ if (unlikely(page == NULL))
+ continue;
+
+ page_virtual = kmap_atomic(page, KM_USER0);
+ flush_dcache_range((unsigned long)page_virtual,
+ (unsigned long)page_virtual + PAGE_SIZE);
+ kunmap_atomic(page_virtual, KM_USER0);
+ }
+#else
+ if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
+ printk(KERN_ERR "Timed out waiting for drm cache flush\n");
#endif
}
EXPORT_SYMBOL(drm_clflush_pages);