From patchwork Tue Apr 21 20:16:22 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: 6252911 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 CD4BBBF4A6 for ; Tue, 21 Apr 2015 20:17:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8A02720303 for ; Tue, 21 Apr 2015 20:17:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D6C0A202EC for ; Tue, 21 Apr 2015 20:16:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752621AbbDUUQz (ORCPT ); Tue, 21 Apr 2015 16:16:55 -0400 Received: from mail-pa0-f46.google.com ([209.85.220.46]:33079 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753526AbbDUUQy (ORCPT ); Tue, 21 Apr 2015 16:16:54 -0400 Received: by paboj16 with SMTP id oj16so251153798pab.0; Tue, 21 Apr 2015 13:16:53 -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=jtQ0ojktrRdWzHelFGOo2QvE9wmk+vwYw6RYavYDEaE=; b=HurYn+suD31R2bvyN/P0JGgtZV+/6R7DrsonE3CdJhansvuwQ5uhiGObximAEyGWwV A0lA6Bn+yNEg7kjZo69MTx/exIPKRbUdax8xg09sqpA1Df5xJtOvdygMEJTBboOyvT/0 vf5/1GKY+D2oy92mFFmFv2ZNuy+Jy3LjDCDVb7nV+Bn5nIQl951Ihb7xn/42zKcdv+3e qA3YHZ50GNPtUScB1O9HLqQ5b8i8u6RQdbTe8nj7YRNdDZUWqvf/CnafVlrI9FErtQ2U rK06h1dFps3MMHlj9Bi2d3U54uAI6QYI3X5ct6kkLy5IhJikIny63nnVjcm6r2gJjPkJ 3hSg== X-Received: by 10.70.98.171 with SMTP id ej11mr9347407pdb.72.1429647413814; Tue, 21 Apr 2015 13:16:53 -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 bo2sm2843889pbb.1.2015.04.21.13.16.51 (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 21 Apr 2015 13:16:53 -0700 (PDT) Received: by mcgrof@gmail.com (sSMTP sendmail emulation); Tue, 21 Apr 2015 13:16:50 -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" , Benjamin Herrenschmidt , Suresh Siddha , Ingo Molnar , Thomas Gleixner , Juergen Gross , Daniel Vetter , Dave Airlie , Antonino Daplas , linux-kernel@vger.kernel.org Subject: [PATCH v3 01/17] video: fbdev: radeonfb: use arch_phys_wc_add() and ioremap_wc() Date: Tue, 21 Apr 2015 13:16:22 -0700 Message-Id: <1429647398-16983-2-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: Benjamin Herrenschmidt Cc: Jean-Christophe Plagniol-Villard Cc: Tomi Valkeinen 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: linux-fbdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Luis R. Rodriguez --- drivers/video/fbdev/aty/radeon_base.c | 29 ++++++----------------------- drivers/video/fbdev/aty/radeonfb.h | 2 +- 2 files changed, 7 insertions(+), 24 deletions(-) diff --git a/drivers/video/fbdev/aty/radeon_base.c b/drivers/video/fbdev/aty/radeon_base.c index 01237c8..2bdb070 100644 --- a/drivers/video/fbdev/aty/radeon_base.c +++ b/drivers/video/fbdev/aty/radeon_base.c @@ -85,10 +85,6 @@ #endif /* CONFIG_PPC */ -#ifdef CONFIG_MTRR -#include -#endif - #include