diff options
Diffstat (limited to 'drivers/gpu/drm/drm_cache.c')
| -rw-r--r-- | drivers/gpu/drm/drm_cache.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index 3dbc7f17eb11..4a4274b348b6 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -101,6 +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) |