From patchwork Sat Jul 25 02:40:20 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 6864251 Return-Path: X-Original-To: patchwork-linux-arm@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 4BAACC05AC for ; Sat, 25 Jul 2015 02:58:07 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3D2962042B for ; Sat, 25 Jul 2015 02:58:06 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1748420416 for ; Sat, 25 Jul 2015 02:58:05 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZIpdI-0006Gf-P1; Sat, 25 Jul 2015 02:56:16 +0000 Received: from mga14.intel.com ([192.55.52.115]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZIpTj-0002pJ-98 for linux-arm-kernel@lists.infradead.org; Sat, 25 Jul 2015 02:46:44 +0000 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga103.fm.intel.com with ESMTP; 24 Jul 2015 19:46:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,542,1432623600"; d="scan'208";a="735186713" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.11]) by orsmga001.jf.intel.com with ESMTP; 24 Jul 2015 19:46:03 -0700 Subject: [PATCH v2 25/25] pmem: convert to generic memremap From: Dan Williams To: tglx@linutronix.de, mingo@kernel.org, hpa@zytor.com Date: Fri, 24 Jul 2015 22:40:20 -0400 Message-ID: <20150725024020.8664.52581.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <20150725023649.8664.59145.stgit@dwillia2-desk3.amr.corp.intel.com> References: <20150725023649.8664.59145.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-8-g92dd MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150724_194623_833131_F9584D4F X-CRM114-Status: GOOD ( 14.73 ) X-Spam-Score: -8.1 (--------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, toshi.kani@hp.com, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, rmk+kernel@arm.linux.org.uk, Ross Zwisler , hch@lst.de, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Update memremap_pmem() to query the architecture for the mapping type of the given persistent memory range and then pass those flags to generic memremap(). arch_memremap_pmem_flags() is provided an address range to evaluate in the event an arch has a need for different mapping types by address range. For example the ACPI NFIT carries EFI mapping types in its memory range description table. Cc: Ross Zwisler Signed-off-by: Dan Williams --- arch/x86/include/asm/io.h | 2 +- arch/x86/mm/ioremap.c | 16 ++++++++++------ include/linux/pmem.h | 26 +++++++++++++++----------- 3 files changed, 26 insertions(+), 18 deletions(-) diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index bba4e8968bc7..1388d7d27775 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -253,7 +253,7 @@ static inline void flush_write_buffers(void) #endif } -void __pmem *arch_memremap_pmem(resource_size_t offset, size_t size); +unsigned long arch_memremap_pmem_flags(resource_size_t offset, size_t size); #endif /* __KERNEL__ */ extern void native_io_delay(void); diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 987a58e84e2f..d4a67223f6e9 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -205,6 +205,16 @@ err_free_memtype: return NULL; } +unsigned long arch_memremap_pmem_flags(resource_size_t offset, size_t size) +{ + /* + * TODO: check the mapping type provided by platform firmware, + * per range. + */ + return MEMREMAP_CACHE; +} +EXPORT_SYMBOL(arch_memremap_pmem_flags); + /** * ioremap_nocache - map bus memory into CPU space * @phys_addr: bus address of the memory @@ -310,12 +320,6 @@ void *arch_memremap(resource_size_t phys_addr, size_t size, } EXPORT_SYMBOL(arch_memremap); -void __pmem *arch_memremap_pmem(resource_size_t offset, size_t size) -{ - return (void __pmem *) arch_memremap(offset, size, MEMREMAP_CACHE); -} -EXPORT_SYMBOL(arch_memremap_pmem); - void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size, unsigned long prot_val) { diff --git a/include/linux/pmem.h b/include/linux/pmem.h index 1bf74c735fa0..03f9d73f3e13 100644 --- a/include/linux/pmem.h +++ b/include/linux/pmem.h @@ -28,10 +28,10 @@ static inline bool __arch_has_wmb_pmem(void) return false; } -static inline void __pmem *arch_memremap_pmem(resource_size_t offset, +static inline unsigned long arch_memremap_pmem_flags(resource_size_t offset, unsigned long size) { - return NULL; + return 0; } static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, @@ -43,8 +43,8 @@ static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, /* * Architectures that define ARCH_HAS_PMEM_API must provide - * implementations for arch_memremap_pmem(), arch_memcpy_to_pmem(), - * arch_wmb_pmem(), and __arch_has_wmb_pmem(). + * implementations for arch_memremap_pmem_flags(), + * arch_memcpy_to_pmem(), arch_wmb_pmem(), and __arch_has_wmb_pmem(). */ static inline void memcpy_from_pmem(void *dst, void __pmem const *src, size_t size) @@ -54,7 +54,7 @@ static inline void memcpy_from_pmem(void *dst, void __pmem const *src, size_t si static inline void memunmap_pmem(void __pmem *addr) { - iounmap((void __force __iomem *) addr); + memunmap((void __force *) addr); } /** @@ -85,16 +85,15 @@ static inline bool arch_has_pmem_api(void) * default_memremap_pmem + default_memcpy_to_pmem is sufficient for * making data durable relative to i/o completion. */ -static void default_memcpy_to_pmem(void __pmem *dst, const void *src, +static inline void default_memcpy_to_pmem(void __pmem *dst, const void *src, size_t size) { memcpy((void __force *) dst, src, size); } -static void __pmem *default_memremap_pmem(resource_size_t offset, - unsigned long size) +static inline unsigned long default_memremap_pmem_flags(void) { - return (void __pmem *) memremap(offset, size, MEMREMAP_WT); + return MEMREMAP_WT; } /** @@ -112,9 +111,14 @@ static void __pmem *default_memremap_pmem(resource_size_t offset, static inline void __pmem *memremap_pmem(resource_size_t offset, unsigned long size) { + unsigned long flags; + if (arch_has_pmem_api()) - return arch_memremap_pmem(offset, size); - return default_memremap_pmem(offset, size); + flags = arch_memremap_pmem_flags(offset, size); + else + flags = default_memremap_pmem_flags(); + + return (void __pmem *) memremap(offset, size, flags); } /**