From patchwork Tue Apr 21 20:16:31 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: 6253121 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0EB409F1C4 for ; Tue, 21 Apr 2015 20:19:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C4E19202EC for ; Tue, 21 Apr 2015 20:19:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9836E20303 for ; Tue, 21 Apr 2015 20:19:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756214AbbDUUR0 (ORCPT ); Tue, 21 Apr 2015 16:17:26 -0400 Received: from mail-pd0-f172.google.com ([209.85.192.172]:34821 "EHLO mail-pd0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756127AbbDUURW (ORCPT ); Tue, 21 Apr 2015 16:17:22 -0400 Received: by pdbqd1 with SMTP id qd1so252318163pdb.2; Tue, 21 Apr 2015 13:17:22 -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=sYat3vzEguitfsx8wcFKhtKuvdfZ/WGq09tY3ucPM9s=; b=izhVqKKMUTWL0BTgvhFrEjBQx6JvCh3zwdpa7uCM1dJArmyjd5V8jvQSo4sFe/iRM8 eDukY35N/NO88siFOdrT2tA/bLEQS2VsfaYmI2lY9J2Ggb4sDLAmOhIHSmFQfRGz8bRh 4+qbhu6k5GQ9xNDBOI9yrSe4jozs9lnwum4h7uB61fPbP0vcfW2gI9h9fuFt9E63uN+8 BHF81AEQ8cdn4fzcYijHhYlAt9kTfzlvAt3B1b1d8KY30Pq+8R72L6lMpoeXc3maONBU 99JespkyB6KxrD4a70hdfWq5jABo0uwCQ0IRdF6K3QNhbWqBCrYivcqcJZWBAkftVXOk 36Qw== X-Received: by 10.68.221.164 with SMTP id qf4mr40926408pbc.1.1429647442184; Tue, 21 Apr 2015 13:17:22 -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 zt9sm2926733pac.9.2015.04.21.13.17.19 (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 21 Apr 2015 13:17:21 -0700 (PDT) Received: by mcgrof@gmail.com (sSMTP sendmail emulation); Tue, 21 Apr 2015 13:17:19 -0700 From: "Luis R. Rodriguez" To: plagnioj@jcrosoft.com, tomi.valkeinen@ti.com Cc: linux-fbdev@vger.kernel.org, luto@amacapital.net, cocci@systeme.lip6.fr, "Luis R. Rodriguez" , Paul Mackerras , Suresh Siddha , Ingo Molnar , Thomas Gleixner , Juergen Gross , Daniel Vetter , Dave Airlie , Antonino Daplas , linux-kernel@vger.kernel.org Subject: [PATCH v3 10/17] video: fbdev: aty: use arch_phys_wc_add() and ioremap_wc() Date: Tue, 21 Apr 2015 13:16:31 -0700 Message-Id: <1429647398-16983-11-git-send-email-mcgrof@do-not-panic.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1429647398-16983-1-git-send-email-mcgrof@do-not-panic.com> References: <1429647398-16983-1-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() (see commit de33c442e titled "x86 PAT: fix performance drop for glx, use UC minus for ioremap(), ioremap_nocache() and pci_mmap_page_range()") 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: Paul Mackerras Cc: Suresh Siddha 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 0156954..c42ce2f 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