From patchwork Sat Aug 25 14:34:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 10576157 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 113B95A4 for ; Sat, 25 Aug 2018 14:34:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 000682AB98 for ; Sat, 25 Aug 2018 14:34:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E8ADA2ABB3; Sat, 25 Aug 2018 14:34:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 926AE2AB98 for ; Sat, 25 Aug 2018 14:34:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726854AbeHYSNc (ORCPT ); Sat, 25 Aug 2018 14:13:32 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:17246 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726624AbeHYSNc (ORCPT ); Sat, 25 Aug 2018 14:13:32 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 41yLJ91Sdhz9ttlT; Sat, 25 Aug 2018 16:34:17 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id oMrrL-15AgJA; Sat, 25 Aug 2018 16:34:17 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 41yLJ90rf6z9ttlQ; Sat, 25 Aug 2018 16:34:17 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 01CF38B796; Sat, 25 Aug 2018 16:34:22 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id gAFO87xxZv7n; Sat, 25 Aug 2018 16:34:21 +0200 (CEST) Received: from pc16082vm.idsi0.si.c-s.fr (unknown [192.168.232.53]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 75D1B8B74B; Sat, 25 Aug 2018 16:34:21 +0200 (CEST) Received: by pc16082vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 42F4F104912; Sat, 25 Aug 2018 16:34:21 +0200 (CEST) From: Christophe Leroy Subject: [PATCH RESEND 1/3] powerpc/32: Add ioremap_wt() To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Bartlomiej Zolnierkiewicz , Jens Axboe Cc: linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-block@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org Message-Id: <20180825143421.42F4F104912@pc16082vm.idsi0.si.c-s.fr> Date: Sat, 25 Aug 2018 16:34:21 +0200 (CEST) Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Other arches have ioremap_wt() to map IO areas write-through. Implement it on PPC as well in order to avoid drivers using __ioremap(_PAGE_WRITETHRU) Signed-off-by: Christophe Leroy --- No change. First serie didn't apply because I generated it on a working branch. arch/powerpc/include/asm/io.h | 6 ++++++ arch/powerpc/mm/pgtable_32.c | 8 ++++++++ 2 files changed, 14 insertions(+) diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index e0331e754568..3380b5b22450 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -3,6 +3,9 @@ #ifdef __KERNEL__ #define ARCH_HAS_IOREMAP_WC +#ifdef CONFIG_PPC32 +#define ARCH_HAS_IOREMAP_WT +#endif /* * This program is free software; you can redistribute it and/or @@ -746,6 +749,8 @@ static inline void iosync(void) * * * ioremap_wc enables write combining * + * * ioremap_wt enables write through + * * * iounmap undoes such a mapping and can be hooked * * * __ioremap_at (and the pending __iounmap_at) are low level functions to @@ -767,6 +772,7 @@ extern void __iomem *ioremap(phys_addr_t address, unsigned long size); extern void __iomem *ioremap_prot(phys_addr_t address, unsigned long size, unsigned long flags); extern void __iomem *ioremap_wc(phys_addr_t address, unsigned long size); +void __iomem *ioremap_wt(phys_addr_t address, unsigned long size); #define ioremap_nocache(addr, size) ioremap((addr), (size)) #define ioremap_uc(addr, size) ioremap((addr), (size)) #define ioremap_cache(addr, size) \ diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 120a49bfb9c6..528999738645 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -89,6 +89,14 @@ ioremap_wc(phys_addr_t addr, unsigned long size) } EXPORT_SYMBOL(ioremap_wc); +void __iomem * +ioremap_wt(phys_addr_t addr, unsigned long size) +{ + return __ioremap_caller(addr, size, _PAGE_WRITETHRU, + __builtin_return_address(0)); +} +EXPORT_SYMBOL(ioremap_wt); + void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags) { From patchwork Sat Aug 25 14:27:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 10576155 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 25F65174A for ; 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Sat, 25 Aug 2018 16:32:37 +0200 (CEST) Received: by localhost.localdomain (Postfix, from userid 0) id 6C0DD104917; Sat, 25 Aug 2018 16:27:00 +0200 (CEST) From: Christophe Leroy Subject: [PATCH RESEND 2/3] drivers/video/fbdev: use ioremap_wt() instead of __ioremap(_PAGE_WRITETHRU) To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Bartlomiej Zolnierkiewicz , Jens Axboe Cc: linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-block@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org Message-Id: <20180825142700.6C0DD104917@pc16082vm.idsi0.si.c-s.fr> Date: Sat, 25 Aug 2018 16:27:00 +0200 (CEST) Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP _PAGE_WRITETHRU is a target specific flag. Prefer generic functions. Signed-off-by: Christophe Leroy --- drivers/video/fbdev/controlfb.c | 3 +-- drivers/video/fbdev/platinumfb.c | 3 +-- drivers/video/fbdev/valkyriefb.c | 10 ++++++---- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/video/fbdev/controlfb.c b/drivers/video/fbdev/controlfb.c index 8d14b29aafea..058093990218 100644 --- a/drivers/video/fbdev/controlfb.c +++ b/drivers/video/fbdev/controlfb.c @@ -715,8 +715,7 @@ static int __init control_of_init(struct device_node *dp) goto error_out; } /* map at most 8MB for the frame buffer */ - p->frame_buffer = __ioremap(p->frame_buffer_phys, 0x800000, - _PAGE_WRITETHRU); + p->frame_buffer = ioremap_wt(p->frame_buffer_phys, 0x800000); if (!p->control_regs_phys || !request_mem_region(p->control_regs_phys, p->control_regs_size, diff --git a/drivers/video/fbdev/platinumfb.c b/drivers/video/fbdev/platinumfb.c index 377d3399a3ad..df79f102fbc6 100644 --- a/drivers/video/fbdev/platinumfb.c +++ b/drivers/video/fbdev/platinumfb.c @@ -577,8 +577,7 @@ static int platinumfb_probe(struct platform_device* odev) /* frame buffer - map only 4MB */ pinfo->frame_buffer_phys = pinfo->rsrc_fb.start; - pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000, - _PAGE_WRITETHRU); + pinfo->frame_buffer = ioremap_wt(pinfo->rsrc_fb.start, 0x400000); pinfo->base_frame_buffer = pinfo->frame_buffer; /* registers */ diff --git a/drivers/video/fbdev/valkyriefb.c b/drivers/video/fbdev/valkyriefb.c index 275fb98236d3..0c6c1eede800 100644 --- a/drivers/video/fbdev/valkyriefb.c +++ b/drivers/video/fbdev/valkyriefb.c @@ -318,7 +318,7 @@ static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p) int __init valkyriefb_init(void) { struct fb_info_valkyrie *p; - unsigned long frame_buffer_phys, cmap_regs_phys, flags; + unsigned long frame_buffer_phys, cmap_regs_phys; int err; char *option = NULL; @@ -337,7 +337,6 @@ int __init valkyriefb_init(void) /* Hardcoded addresses... welcome to 68k Macintosh country :-) */ frame_buffer_phys = 0xf9000000; cmap_regs_phys = 0x50f24000; - flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */ #else /* ppc (!CONFIG_MAC) */ { struct device_node *dp; @@ -354,7 +353,6 @@ int __init valkyriefb_init(void) frame_buffer_phys = r.start; cmap_regs_phys = r.start + 0x304000; - flags = _PAGE_WRITETHRU; } #endif /* ppc (!CONFIG_MAC) */ @@ -369,7 +367,11 @@ int __init valkyriefb_init(void) } p->total_vram = 0x100000; p->frame_buffer_phys = frame_buffer_phys; - p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags); +#ifdef CONFIG_MAC + p->frame_buffer = ioremap_nocache(frame_buffer_phys, p->total_vram); +#else + p->frame_buffer = ioremap_wt(frame_buffer_phys, p->total_vram); +#endif p->cmap_regs_phys = cmap_regs_phys; p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000); p->valkyrie_regs_phys = cmap_regs_phys+0x6000; From patchwork Sat Aug 25 14:27:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 10576149 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ECA4915A7 for ; Sat, 25 Aug 2018 14:32:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D72B32A9F8 for ; Sat, 25 Aug 2018 14:32:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CA7902AA03; Sat, 25 Aug 2018 14:32:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E98302A9F8 for ; Sat, 25 Aug 2018 14:32:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726624AbeHYSLr (ORCPT ); Sat, 25 Aug 2018 14:11:47 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:34844 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726751AbeHYSLr (ORCPT ); Sat, 25 Aug 2018 14:11:47 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 41yLG92P5Tz9ttld; Sat, 25 Aug 2018 16:32:33 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id R6KBo7vTm_TR; Sat, 25 Aug 2018 16:32:33 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 41yLG91gKkz9ttlQ; Sat, 25 Aug 2018 16:32:33 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id F33798B74B; Sat, 25 Aug 2018 16:32:37 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id Qq2bafMdF7cL; Sat, 25 Aug 2018 16:32:37 +0200 (CEST) Received: from pc16082vm.idsi0.si.c-s.fr (unknown [192.168.232.53]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 9068F8B798; Sat, 25 Aug 2018 16:32:37 +0200 (CEST) Received: by localhost.localdomain (Postfix, from userid 0) id 77FD7104918; Sat, 25 Aug 2018 16:27:02 +0200 (CEST) From: Christophe Leroy Subject: [PATCH RESEND 3/3] drivers/block/z2ram: use ioremap_wt() instead of __ioremap(_PAGE_WRITETHRU) To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Bartlomiej Zolnierkiewicz , Jens Axboe Cc: linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-block@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org Message-Id: <20180825142702.77FD7104918@pc16082vm.idsi0.si.c-s.fr> Date: Sat, 25 Aug 2018 16:27:02 +0200 (CEST) Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP _PAGE_WRITETHRU is a target specific flag. Prefer generic functions. Signed-off-by: Christophe Leroy --- drivers/block/z2ram.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c index d0c5bc4e0703..cfbd70520eeb 100644 --- a/drivers/block/z2ram.c +++ b/drivers/block/z2ram.c @@ -190,8 +190,7 @@ static int z2_open(struct block_device *bdev, fmode_t mode) vfree(vmalloc (size)); } - vaddr = (unsigned long) __ioremap (paddr, size, - _PAGE_WRITETHRU); + vaddr = (unsigned long)ioremap_wt(paddr, size); #else vaddr = (unsigned long)z_remap_nocache_nonser(paddr, size);