GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 23:32:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

drm/ttm: consolidate cache flushing code in one place.

Browse source 
This merges the TTM and drm cache flushing into one file in the
drm core.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2009-08-27 09:53:47 +10:00
commit c9c97b8c75
3 changed files with 82 additions and 74 deletions
Download patch file Download diff file Expand all files Collapse all files

51
drivers/gpu/drm/drm_cache.c
View file

@ -45,25 +45,58 @@ drm_clflush_page(struct page *page)
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);