From mboxrd@z Thu Jan 1 00:00:00 1970 From: thierry.reding@gmail.com (Thierry Reding) Date: Thu, 9 Apr 2015 16:34:06 +0200 Subject: [PATCH 3/6] drm/cache: Implement drm_clflush_*() for 64-bit ARM In-Reply-To: <1428590049-20357-1-git-send-email-thierry.reding@gmail.com> References: <1428590049-20357-1-git-send-email-thierry.reding@gmail.com> Message-ID: <1428590049-20357-3-git-send-email-thierry.reding@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Thierry Reding Add implementations for drm_clflush_*() on 64-bit ARM. This shares a lot of code with the 32-bit ARM implementation. Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_cache.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index 200d86c3d72d..0c3072b4cdc9 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -102,6 +102,17 @@ static void drm_clflush_page(struct page *page) } #endif +#if defined(CONFIG_ARM64) +static void drm_clflush_page(struct page *page) +{ + void *virt; + + virt = kmap_atomic(page); + __dma_flush_range(virt, virt + PAGE_SIZE); + kunmap_atomic(virt); +} +#endif + void drm_clflush_pages(struct page *pages[], unsigned long num_pages) { @@ -129,7 +140,7 @@ drm_clflush_pages(struct page *pages[], unsigned long num_pages) (unsigned long)page_virtual + PAGE_SIZE); kunmap_atomic(page_virtual); } -#elif defined(CONFIG_ARM) +#elif defined(CONFIG_ARM) || defined(CONFIG_ARM64) unsigned long i; for (i = 0; i < num_pages; i++) @@ -158,7 +169,7 @@ drm_clflush_sg(struct sg_table *st) if (wbinvd_on_all_cpus()) printk(KERN_ERR "Timed out waiting for cache flush.\n"); -#elif defined(CONFIG_ARM) +#elif defined(CONFIG_ARM) || defined(CONFIG_ARM64) struct sg_page_iter sg_iter; for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) -- 2.3.2