From patchwork Thu Jul 30 16:54:34 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 6905401 Return-Path: X-Original-To: patchwork-linux-arm@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 4BECB9F358 for ; Thu, 30 Jul 2015 17:12:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B5ADC20499 for ; Thu, 30 Jul 2015 17:12:39 +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 094CD20555 for ; Thu, 30 Jul 2015 17:12:36 +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 1ZKrLv-0003ja-Ue; Thu, 30 Jul 2015 17:10:43 +0000 Received: from mga09.intel.com ([134.134.136.24]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZKrCB-0000Jt-PW for linux-arm-kernel@lists.infradead.org; Thu, 30 Jul 2015 17:00:42 +0000 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP; 30 Jul 2015 10:00:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,577,1432623600"; d="scan'208";a="758562684" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.11]) by fmsmga001.fm.intel.com with ESMTP; 30 Jul 2015 10:00:15 -0700 Subject: [PATCH v3 10/24] acpi: switch from ioremap_cache to memremap From: Dan Williams To: tglx@linutronix.de, mingo@kernel.org, hpa@zytor.com Date: Thu, 30 Jul 2015 12:54:34 -0400 Message-ID: <20150730165433.33962.1046.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <20150730165155.33962.64121.stgit@dwillia2-desk3.amr.corp.intel.com> References: <20150730165155.33962.64121.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-20150730_100040_085271_45B26B8F X-CRM114-Status: GOOD ( 17.66 ) X-Spam-Score: -8.3 (--------) 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, mcgrof@suse.com, "Rafael J. Wysocki" , Bob Moore , linux-kernel@vger.kernel.org, Lv Zheng , rmk+kernel@arm.linux.org.uk, 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=-5.6 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 In preparation for deprecating ioremap_cache() convert its usage in drivers/acpi and include/acpi/ to memremap. This includes dropping the __iomem annotation throughout ACPI since the memremap can be treated as a normal memory pointer. Finally, memremap automatically handles requests to map normal memory pages, so this also drops the calls to "should_use_kmap()". It seems ARM had a local definition of acpi_os_ioremap() to handle RAM addresses, but it can be deleted now that memremap() handles this generically. Cc: Bob Moore Cc: Lv Zheng Cc: Russell King Acked-by: Rafael J. Wysocki Signed-off-by: Dan Williams --- arch/arm64/include/asm/acpi.h | 8 ----- drivers/acpi/apei/einj.c | 9 +++-- drivers/acpi/apei/erst.c | 6 ++-- drivers/acpi/nvs.c | 6 ++-- drivers/acpi/osl.c | 70 +++++++++++------------------------------ include/acpi/acpi_io.h | 6 +--- 6 files changed, 32 insertions(+), 73 deletions(-) diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h index fdccacd8f7bb..f9f3dcd2bffd 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -29,14 +29,6 @@ /* Basic configuration for ACPI */ #ifdef CONFIG_ACPI -/* ACPI table mapping after acpi_gbl_permanent_mmap is set */ -static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, - acpi_size size) -{ - return memremap(phys, size, MEMREMAP_WB); -} -#define acpi_os_ioremap acpi_os_ioremap - typedef u64 phys_cpuid_t; #define PHYS_CPUID_INVALID INVALID_HWID diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c index a095d4f858da..270636220746 100644 --- a/drivers/acpi/apei/einj.c +++ b/drivers/acpi/apei/einj.c @@ -318,7 +318,8 @@ static int __einj_error_trigger(u64 trigger_paddr, u32 type, sizeof(*trigger_tab) - 1); goto out; } - trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab)); + trigger_tab = memremap(trigger_paddr, sizeof(*trigger_tab), + MEMREMAP_WB); if (!trigger_tab) { pr_err(EINJ_PFX "Failed to map trigger table!\n"); goto out_rel_header; @@ -346,8 +347,8 @@ static int __einj_error_trigger(u64 trigger_paddr, u32 type, (unsigned long long)trigger_paddr + table_size - 1); goto out_rel_header; } - iounmap(trigger_tab); - trigger_tab = ioremap_cache(trigger_paddr, table_size); + memunmap(trigger_tab); + trigger_tab = memremap(trigger_paddr, table_size, MEMREMAP_WB); if (!trigger_tab) { pr_err(EINJ_PFX "Failed to map trigger table!\n"); goto out_rel_entry; @@ -409,7 +410,7 @@ out_rel_header: release_mem_region(trigger_paddr, sizeof(*trigger_tab)); out: if (trigger_tab) - iounmap(trigger_tab); + memunmap(trigger_tab); return rc; } diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c index 3670bbab57a3..569237176e18 100644 --- a/drivers/acpi/apei/erst.c +++ b/drivers/acpi/apei/erst.c @@ -77,7 +77,7 @@ static struct acpi_table_erst *erst_tab; static struct erst_erange { u64 base; u64 size; - void __iomem *vaddr; + void *vaddr; u32 attr; } erst_erange; @@ -1185,8 +1185,8 @@ static int __init erst_init(void) goto err_unmap_reg; } rc = -ENOMEM; - erst_erange.vaddr = ioremap_cache(erst_erange.base, - erst_erange.size); + erst_erange.vaddr = memremap(erst_erange.base, erst_erange.size, + MEMREMAP_WB); if (!erst_erange.vaddr) goto err_release_erange; diff --git a/drivers/acpi/nvs.c b/drivers/acpi/nvs.c index 85287b8fe3aa..e0e15af93b22 100644 --- a/drivers/acpi/nvs.c +++ b/drivers/acpi/nvs.c @@ -136,7 +136,7 @@ void suspend_nvs_free(void) entry->data = NULL; if (entry->kaddr) { if (entry->unmap) { - iounmap(entry->kaddr); + memunmap(entry->kaddr); entry->unmap = false; } else { acpi_os_unmap_iomem(entry->kaddr, @@ -180,7 +180,7 @@ int suspend_nvs_save(void) entry->kaddr = acpi_os_get_iomem(phys, size); if (!entry->kaddr) { - entry->kaddr = acpi_os_ioremap(phys, size); + entry->kaddr = acpi_os_memremap(phys, size); entry->unmap = !!entry->kaddr; } if (!entry->kaddr) { @@ -197,7 +197,7 @@ int suspend_nvs_save(void) * suspend_nvs_restore - restore NVS memory regions * * This function is going to be called with interrupts disabled, so it - * cannot iounmap the virtual addresses used to access the NVS region. + * cannot memunmap the virtual addresses used to access the NVS region. */ void suspend_nvs_restore(void) { diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 3b8963f21b36..9d5242179b74 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -31,7 +31,6 @@ #include #include #include -#include #include #include #include @@ -44,8 +43,8 @@ #include #include #include +#include -#include #include #include "internal.h" @@ -90,7 +89,7 @@ static struct workqueue_struct *kacpi_hotplug_wq; */ struct acpi_ioremap { struct list_head list; - void __iomem *virt; + void *virt; acpi_physical_address phys; acpi_size size; unsigned long refcount; @@ -294,7 +293,7 @@ acpi_map_lookup(acpi_physical_address phys, acpi_size size) } /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ -static void __iomem * +static void * acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) { struct acpi_ioremap *map; @@ -306,10 +305,10 @@ acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) return NULL; } -void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) +void *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) { struct acpi_ioremap *map; - void __iomem *virt = NULL; + void *virt = NULL; mutex_lock(&acpi_ioremap_lock); map = acpi_map_lookup(phys, size); @@ -324,7 +323,7 @@ EXPORT_SYMBOL_GPL(acpi_os_get_iomem); /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ static struct acpi_ioremap * -acpi_map_lookup_virt(void __iomem *virt, acpi_size size) +acpi_map_lookup_virt(void *virt, acpi_size size) { struct acpi_ioremap *map; @@ -336,44 +335,13 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size) return NULL; } -#if defined(CONFIG_IA64) || defined(CONFIG_ARM64) -/* ioremap will take care of cache attributes */ -#define should_use_kmap(pfn) 0 -#else -#define should_use_kmap(pfn) page_is_ram(pfn) -#endif - -static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) -{ - unsigned long pfn; - - pfn = pg_off >> PAGE_SHIFT; - if (should_use_kmap(pfn)) { - if (pg_sz > PAGE_SIZE) - return NULL; - return (void __iomem __force *)kmap(pfn_to_page(pfn)); - } else - return acpi_os_ioremap(pg_off, pg_sz); -} - -static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) -{ - unsigned long pfn; - - pfn = pg_off >> PAGE_SHIFT; - if (should_use_kmap(pfn)) - kunmap(pfn_to_page(pfn)); - else - iounmap(vaddr); -} - -void __iomem *__init_refok +void *__init_refok acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) { struct acpi_ioremap *map; - void __iomem *virt; acpi_physical_address pg_off; acpi_size pg_sz; + void *virt; if (phys > ULONG_MAX) { printk(KERN_ERR PREFIX "Cannot map memory that high\n"); @@ -399,7 +367,7 @@ acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) pg_off = round_down(phys, PAGE_SIZE); pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; - virt = acpi_map(pg_off, pg_sz); + virt = acpi_os_memremap(pg_off, pg_sz); if (!virt) { mutex_unlock(&acpi_ioremap_lock); kfree(map); @@ -437,7 +405,7 @@ static void acpi_os_map_cleanup(struct acpi_ioremap *map) { if (!map->refcount) { synchronize_rcu_expedited(); - acpi_unmap(map->phys, map->virt); + memunmap(map->virt); kfree(map); } } @@ -965,7 +933,7 @@ static inline u64 read64(const volatile void __iomem *addr) acpi_status acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) { - void __iomem *virt_addr; + void *virt_addr; unsigned int size = width / 8; bool unmap = false; u64 dummy; @@ -974,7 +942,7 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) virt_addr = acpi_map_vaddr_lookup(phys_addr, size); if (!virt_addr) { rcu_read_unlock(); - virt_addr = acpi_os_ioremap(phys_addr, size); + virt_addr = acpi_os_memremap(phys_addr, size); if (!virt_addr) return AE_BAD_ADDRESS; unmap = true; @@ -985,23 +953,23 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) switch (width) { case 8: - *(u8 *) value = readb(virt_addr); + *(u8 *) value = *(u8 *) virt_addr; break; case 16: - *(u16 *) value = readw(virt_addr); + *(u16 *) value = *(u16 *) virt_addr; break; case 32: - *(u32 *) value = readl(virt_addr); + *(u32 *) value = *(u32 *) virt_addr; break; case 64: - *(u64 *) value = read64(virt_addr); + *(u64 *) value = *(u64 *) virt_addr; break; default: BUG(); } if (unmap) - iounmap(virt_addr); + memunmap(virt_addr); else rcu_read_unlock(); @@ -1032,7 +1000,7 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) virt_addr = acpi_map_vaddr_lookup(phys_addr, size); if (!virt_addr) { rcu_read_unlock(); - virt_addr = acpi_os_ioremap(phys_addr, size); + virt_addr = acpi_os_memremap(phys_addr, size); if (!virt_addr) return AE_BAD_ADDRESS; unmap = true; @@ -1056,7 +1024,7 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) } if (unmap) - iounmap(virt_addr); + memunmap(virt_addr); else rcu_read_unlock(); diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h index dd86c5fc102d..646ce8714109 100644 --- a/include/acpi/acpi_io.h +++ b/include/acpi/acpi_io.h @@ -5,13 +5,11 @@ #include -#ifndef acpi_os_ioremap -static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, +static inline void *acpi_os_memremap(acpi_physical_address phys, acpi_size size) { - return ioremap_cache(phys, size); + return memremap(phys, size, MEMREMAP_WB); } -#endif void __iomem *__init_refok acpi_os_map_iomem(acpi_physical_address phys, acpi_size size);