From patchwork Fri Mar 20 23:18:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Luis R. Rodriguez" X-Patchwork-Id: 6062531 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0FD5BBF90F for ; Sat, 21 Mar 2015 00:38:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id ED99320515 for ; Sat, 21 Mar 2015 00:38:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0F8720531 for ; Sat, 21 Mar 2015 00:38:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752270AbbCUAiB (ORCPT ); Fri, 20 Mar 2015 20:38:01 -0400 Received: from mail-pa0-f49.google.com ([209.85.220.49]:35670 "EHLO mail-pa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751190AbbCUAiA (ORCPT ); Fri, 20 Mar 2015 20:38:00 -0400 Received: by pagj4 with SMTP id j4so33169563pag.2; Fri, 20 Mar 2015 17:37:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=tnboE/7I6aVDhlEJkgncdOgGasNN5Hf1kA/zZw7b/Vc=; b=LeCr5kOffmkQEJrYrDw5nmgUQfxbIf1q8JvQ/lqjjjJrTM4KP0c2pM2rdBqF1gVdL3 dPeFIpiZQdx0jmBBf3cd1XhxuDhCt5HOvL4wMMnJQunvXIIQwwYwv9qNq+BeHC1w0t4Y ZxB+SapVRBA4q8ilNqFk2TiOwcG17BpEnu4KTenET1CnbC2xs9X8TGZ8b9htHwGnAU+B A33CqaELrX7ZeucZ7gX0rwDfHDf1WLLa/y/qz+HqiUGQtsQvUTjQhDoxkZ4NrXPVlnTA ZdGYGqdudlgDmsfe/PCEuXirhUeNzyjTC4qeHedlJvenrKjCwcaYEVhgtX+Bo5gOgY+1 ZV/g== X-Received: by 10.69.15.99 with SMTP id fn3mr974790pbd.45.1426898279900; Fri, 20 Mar 2015 17:37:59 -0700 (PDT) Received: from mcgrof@gmail.com (c-98-234-145-61.hsd1.ca.comcast.net. [98.234.145.61]) by mx.google.com with ESMTPSA id ds4sm227203pbc.59.2015.03.20.17.37.56 (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 20 Mar 2015 17:37:58 -0700 (PDT) Received: by mcgrof@gmail.com (sSMTP sendmail emulation); Fri, 20 Mar 2015 17:35:47 -0700 From: "Luis R. Rodriguez" To: luto@amacapital.net, mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com, jgross@suse.com, JBeulich@suse.com, bp@suse.de, suresh.b.siddha@intel.com, venkatesh.pallipadi@intel.com, airlied@redhat.com Cc: linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, x86@kernel.org, xen-devel@lists.xenproject.org, "Luis R. Rodriguez" , Ingo Molnar , Daniel Vetter , Antonino Daplas , Jean-Christophe Plagniol-Villard , Tomi Valkeinen Subject: [PATCH v1 35/47] video: fbdev: aty: use arch_phys_wc_add() and ioremap_wc() Date: Fri, 20 Mar 2015 16:18:25 -0700 Message-Id: <1426893517-2511-36-git-send-email-mcgrof@do-not-panic.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1426893517-2511-1-git-send-email-mcgrof@do-not-panic.com> References: <1426893517-2511-1-git-send-email-mcgrof@do-not-panic.com> Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID,T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "Luis R. Rodriguez" Convert the driver from using the x86 specific MTRR code to the architecture agnostic arch_phys_wc_add(). arch_phys_wc_add() will avoid MTRR if write-combining is available, in order to take advantage of that also ensure the ioremap'd area is requested as write-combining. There are a few motivations for this: a) Take advantage of PAT when available b) Help bury MTRR code away, MTRR is architecture specific and on x86 its replaced by PAT c) Help with the goal of eventually using _PAGE_CACHE_UC over _PAGE_CACHE_UC_MINUS on x86 on ioremap_nocache() (de33c442e) The conversion done is expressed by the following Coccinelle SmPL patch, it additionally required manual intervention to address all the #ifdery and removal of redundant things which arch_phys_wc_add() already addresses such as verbose message about when MTRR fails and doing nothing when we didn't get an MTRR. @ mtrr_found @ expression index, base, size; @@ -index = mtrr_add(base, size, MTRR_TYPE_WRCOMB, 1); +index = arch_phys_wc_add(base, size); @ mtrr_rm depends on mtrr_found @ expression mtrr_found.index, mtrr_found.base, mtrr_found.size; @@ -mtrr_del(index, base, size); +arch_phys_wc_del(index); @ mtrr_rm_zero_arg depends on mtrr_found @ expression mtrr_found.index; @@ -mtrr_del(index, 0, 0); +arch_phys_wc_del(index); @ mtrr_rm_fb_info depends on mtrr_found @ struct fb_info *info; expression mtrr_found.index; @@ -mtrr_del(index, info->fix.smem_start, info->fix.smem_len); +arch_phys_wc_del(index); @ ioremap_replace_nocache depends on mtrr_found @ struct fb_info *info; expression base, size; @@ -info->screen_base = ioremap_nocache(base, size); +info->screen_base = ioremap_wc(base, size); @ ioremap_replace_default depends on mtrr_found @ struct fb_info *info; expression base, size; @@ -info->screen_base = ioremap(base, size); +info->screen_base = ioremap_wc(base, size); Generated-by: Coccinelle SmPL Cc: Suresh Siddha Cc: Venkatesh Pallipadi Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Juergen Gross Cc: Daniel Vetter Cc: Andy Lutomirski Cc: Dave Airlie Cc: Antonino Daplas Cc: Jean-Christophe Plagniol-Villard Cc: Tomi Valkeinen Cc: linux-fbdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Luis R. Rodriguez --- drivers/video/fbdev/aty/aty128fb.c | 36 ++++++------------------------------ 1 file changed, 6 insertions(+), 30 deletions(-) diff --git a/drivers/video/fbdev/aty/aty128fb.c b/drivers/video/fbdev/aty/aty128fb.c index aedf2fb..f41955b 100644 --- a/drivers/video/fbdev/aty/aty128fb.c +++ b/drivers/video/fbdev/aty/aty128fb.c @@ -80,10 +80,6 @@ #include #endif /* CONFIG_BOOTX_TEXT */ -#ifdef CONFIG_MTRR -#include -#endif - #include