diff options
Diffstat (limited to 'drivers/gpu/drm/drm_cache.c')
| -rw-r--r-- | drivers/gpu/drm/drm_cache.c | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index 0e994a0e46d4..0e3bd5b54b78 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -45,6 +45,23 @@ drm_clflush_page(struct page *page) clflush(page_virtual + i); kunmap_atomic(page_virtual, KM_USER0); } + +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(); +} #endif void @@ -53,17 +70,30 @@ 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 + printk(KERN_ERR "Architecture has no drm_cache.c support\n"); + WARN_ON_ONCE(1); #endif } EXPORT_SYMBOL(drm_clflush_pages); |