From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752485AbbCUAb0 (ORCPT ); Fri, 20 Mar 2015 20:31:26 -0400 Received: from mail-pd0-f182.google.com ([209.85.192.182]:36455 "EHLO mail-pd0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752423AbbCUAbY (ORCPT ); Fri, 20 Mar 2015 20:31:24 -0400 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 32/47] video: fbdev: nvidia: use arch_phys_wc_add() and ioremap_wc() Date: Fri, 20 Mar 2015 16:18:22 -0700 Message-Id: <1426893517-2511-33-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-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Luis R. Rodriguez" This driver uses the same area for MTRR and ioremap(). 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/nvidia/nv_type.h | 7 +------ drivers/video/fbdev/nvidia/nvidia.c | 37 ++++++------------------------------ 2 files changed, 7 insertions(+), 37 deletions(-) diff --git a/drivers/video/fbdev/nvidia/nv_type.h b/drivers/video/fbdev/nvidia/nv_type.h index c03f7f5..6ff321a 100644 --- a/drivers/video/fbdev/nvidia/nv_type.h +++ b/drivers/video/fbdev/nvidia/nv_type.h @@ -148,12 +148,7 @@ struct nvidia_par { u32 forceCRTC; u32 open_count; u8 DDCBase; -#ifdef CONFIG_MTRR - struct { - int vram; - int vram_valid; - } mtrr; -#endif + int wc_cookie; struct nvidia_i2c_chan chan[3]; volatile u32 __iomem *REGS; diff --git a/drivers/video/fbdev/nvidia/nvidia.c b/drivers/video/fbdev/nvidia/nvidia.c index def0412..781f5e7 100644 --- a/drivers/video/fbdev/nvidia/nvidia.c +++ b/drivers/video/fbdev/nvidia/nvidia.c @@ -21,9 +21,6 @@ #include #include #include -#ifdef CONFIG_MTRR -#include -#endif #ifdef CONFIG_PPC_OF #include #include @@ -80,9 +77,7 @@ static int paneltweak = 0; static int vram = 0; static int bpp = 8; static int reverse_i2c; -#ifdef CONFIG_MTRR static bool nomtrr = false; -#endif #ifdef CONFIG_PMAC_BACKLIGHT static int backlight = 1; #else @@ -1365,7 +1360,8 @@ static int nvidiafb_probe(struct pci_dev *pd, const struct pci_device_id *ent) par->ScratchBufferStart = par->FbUsableSize - par->ScratchBufferSize; par->CursorStart = par->FbUsableSize + (32 * 1024); - info->screen_base = ioremap(nvidiafb_fix.smem_start, par->FbMapSize); + info->screen_base = ioremap_wc(nvidiafb_fix.smem_start, + par->FbMapSize); info->screen_size = par->FbUsableSize; nvidiafb_fix.smem_len = par->RamAmountKBytes * 1024; @@ -1376,20 +1372,9 @@ static int nvidiafb_probe(struct pci_dev *pd, const struct pci_device_id *ent) par->FbStart = info->screen_base; -#ifdef CONFIG_MTRR - if (!nomtrr) { - par->mtrr.vram = mtrr_add(nvidiafb_fix.smem_start, - par->RamAmountKBytes * 1024, - MTRR_TYPE_WRCOMB, 1); - if (par->mtrr.vram < 0) { - printk(KERN_ERR PFX "unable to setup MTRR\n"); - } else { - par->mtrr.vram_valid = 1; - /* let there be speed */ - printk(KERN_INFO PFX "MTRR set to ON\n"); - } - } -#endif /* CONFIG_MTRR */ + if (!nomtrr) + par->wc_cookie = arch_phys_wc_add(nvidiafb_fix.smem_start, + par->RamAmountKBytes * 1024); info->fbops = &nvidia_fb_ops; info->fix = nvidiafb_fix; @@ -1447,13 +1432,7 @@ static void nvidiafb_remove(struct pci_dev *pd) unregister_framebuffer(info); nvidia_bl_exit(par); - -#ifdef CONFIG_MTRR - if (par->mtrr.vram_valid) - mtrr_del(par->mtrr.vram, info->fix.smem_start, - info->fix.smem_len); -#endif /* CONFIG_MTRR */ - + arch_phys_wc_del(par->wc_cookie); iounmap(info->screen_base); fb_destroy_modedb(info->monspecs.modedb); nvidia_delete_i2c_busses(par); @@ -1505,10 +1484,8 @@ static int nvidiafb_setup(char *options) vram = simple_strtoul(this_opt+5, NULL, 0); } else if (!strncmp(this_opt, "backlight:", 10)) { backlight = simple_strtoul(this_opt+10, NULL, 0); -#ifdef CONFIG_MTRR } else if (!strncmp(this_opt, "nomtrr", 6)) { nomtrr = true; -#endif } else if (!strncmp(this_opt, "fpdither:", 9)) { fpdither = simple_strtol(this_opt+9, NULL, 0); } else if (!strncmp(this_opt, "bpp:", 4)) { @@ -1596,11 +1573,9 @@ MODULE_PARM_DESC(bpp, "pixel width in bits" "(default=8)"); module_param(reverse_i2c, int, 0); MODULE_PARM_DESC(reverse_i2c, "reverse port assignment of the i2c bus"); -#ifdef CONFIG_MTRR module_param(nomtrr, bool, false); MODULE_PARM_DESC(nomtrr, "Disables MTRR support (0 or 1=disabled) " "(default=0)"); -#endif MODULE_AUTHOR("Antonino Daplas"); MODULE_DESCRIPTION("Framebuffer driver for nVidia graphics chipset"); -- 2.3.2.209.gd67f9d5.dirty