From patchwork Fri Mar 20 23:18:15 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: 6062341 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 812DC9F399 for ; Sat, 21 Mar 2015 00:16:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 67E1E2041D for ; Sat, 21 Mar 2015 00:16:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3CB16203DA for ; Sat, 21 Mar 2015 00:16:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751922AbbCUAQB (ORCPT ); Fri, 20 Mar 2015 20:16:01 -0400 Received: from mail-pd0-f180.google.com ([209.85.192.180]:36246 "EHLO mail-pd0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751874AbbCUAP7 (ORCPT ); Fri, 20 Mar 2015 20:15:59 -0400 Received: by pdbcz9 with SMTP id cz9so122818021pdb.3; Fri, 20 Mar 2015 17:15:59 -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=kY2mHpKRX4xL9Pu/7k+BYc/wU4E4AuVTuUa4OyxVru4=; b=y0HoD/Zp85DbNqjjCyOHhoEtxY3fDLNDd2lZyNnWss1YPKcJXRwNH5oBrX5hoAs3G8 AyhCVDRWNxFkPkgQVChX38GXXckbqt3XhVWNUBxyKRCDoiMbU2Z0BeZht0w2buanzBP6 8jMXMNEKPmIJAWPLrz2RzL3M6guVVXcEQjAP9Sckmtj5OMUP841lLAedr+oIf9TZ1PHU 7z39mPExV3tPxawSiWkOIPieTEYcz8vAXzZPI531CkKHo0fXMBQyKcShNR0K0ODg+sER Gdi1ogDk9n8f3TNG2+V/UN7sGQTeYoGvwwmZFAqjfDtHoHKf4etYpvELOPns3JyGudPv roag== X-Received: by 10.66.118.198 with SMTP id ko6mr195205060pab.16.1426896959154; Fri, 20 Mar 2015 17:15:59 -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 eb4sm201345pbd.18.2015.03.20.17.15.54 (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 20 Mar 2015 17:15:56 -0700 (PDT) Received: by mcgrof@gmail.com (sSMTP sendmail emulation); Fri, 20 Mar 2015 17:13:46 -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 25/47] video: fbdev: radeonfb: use arch_phys_wc_add() and ioremap_wc() Date: Fri, 20 Mar 2015 16:18:15 -0700 Message-Id: <1426893517-2511-26-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/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 26d80a4..922e8fc 100644 --- a/drivers/video/fbdev/aty/radeon_base.c +++ b/drivers/video/fbdev/aty/radeon_base.c @@ -85,10 +85,6 @@ #endif /* CONFIG_PPC_OF */ -#ifdef CONFIG_MTRR -#include -#endif - #include