From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752151AbZGXIWf (ORCPT ); Fri, 24 Jul 2009 04:22:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751821AbZGXIWe (ORCPT ); Fri, 24 Jul 2009 04:22:34 -0400 Received: from smtp-outbound-1.vmware.com ([65.115.85.69]:57498 "EHLO smtp-outbound-1.vmware.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751787AbZGXIWd (ORCPT ); Fri, 24 Jul 2009 04:22:33 -0400 From: Thomas Hellstrom To: dri-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Thomas Hellstrom Subject: [PATCH] ttm: powerpc: Fix Highmem cache flushing. Date: Fri, 24 Jul 2009 10:22:36 +0200 Message-Id: <1248423756-1564-1-git-send-email-thellstrom@vmware.com> X-Mailer: git-send-email 1.5.4.3 In-Reply-To: <> References: <> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Temporarily maps highmem pages while flushing to get a valid virtual address to flush. Signed-off-by: Thomas Hellstrom --- drivers/gpu/drm/ttm/ttm_tt.c | 14 ++++++++++---- 1 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index 914a756..44f53a1 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -86,10 +86,16 @@ void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages) unsigned long i; for (i = 0; i < num_pages; ++i) { - if (pages[i]) { - unsigned long start = (unsigned long)page_address(pages[i]); - flush_dcache_range(start, start + PAGE_SIZE); - } + 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(ttm_tt_ipi_handler, NULL, 1) != 0) -- 1.5.4.3