From: Dan Williams <dan.j.williams@intel.com> To: arnd@arndb.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, tglx@linutronix.de, ross.zwisler@linux.intel.com, akpm@linux-foundation.org Cc: jgross@suse.com, x86@kernel.org, toshi.kani@hp.com, linux-nvdimm@lists.01.org, benh@kernel.crashing.org, mcgrof@suse.com, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, stefan.bader@canonical.com, luto@amacapital.net, linux-mm@kvack.org, geert@linux-m68k.org, ralf@linux-mips.org, hmh@hmh.eng.br, mpe@ellerman.id.au, tj@kernel.org, paulus@samba.org, hch@lst.de Subject: [PATCH v3 4/6] devm: fix ioremap_cache() usage Date: Wed, 03 Jun 2015 17:34:34 -0400 [thread overview] Message-ID: <20150603213434.13749.46518.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <20150603211948.13749.85816.stgit@dwillia2-desk3.amr.corp.intel.com> Provide devm_ioremap_cache() and fix up devm_ioremap_resource() to actually provide cacheable mappings. On archs that implement ioremap_cache() devm_ioremap_resource() is always silently falling back to uncached when IORESOURCE_CACHEABLE is specified. Cc: Toshi Kani <toshi.kani@hp.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- include/linux/io.h | 2 ++ lib/devres.c | 53 +++++++++++++++++++++++++--------------------------- 2 files changed, 27 insertions(+), 28 deletions(-) diff --git a/include/linux/io.h b/include/linux/io.h index 04cce4da3685..1c9ad4c6d485 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -70,6 +70,8 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, resource_size_t size); +void __iomem *devm_ioremap_cache(struct device *dev, resource_size_t offset, + resource_size_t size); void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, resource_size_t size); void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, diff --git a/lib/devres.c b/lib/devres.c index f4001d90d24d..c8e75cdaf816 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -14,6 +14,8 @@ static int devm_ioremap_match(struct device *dev, void *res, void *match_data) return *(void **)res == match_data; } +typedef void __iomem *(*ioremap_fn)(resource_size_t offset, unsigned long size); + /** * devm_ioremap - Managed ioremap() * @dev: Generic device to remap IO address for @@ -22,8 +24,9 @@ static int devm_ioremap_match(struct device *dev, void *res, void *match_data) * * Managed ioremap(). Map is automatically unmapped on driver detach. */ -void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, - resource_size_t size) +static void __iomem *devm_ioremap_type(struct device *dev, + resource_size_t offset, resource_size_t size, + ioremap_fn ioremap_type) { void __iomem **ptr, *addr; @@ -31,7 +34,7 @@ void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, if (!ptr) return NULL; - addr = ioremap(offset, size); + addr = ioremap_type(offset, size); if (addr) { *ptr = addr; devres_add(dev, ptr); @@ -40,34 +43,25 @@ void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, return addr; } + +void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return devm_ioremap_type(dev, offset, size, ioremap); +} EXPORT_SYMBOL(devm_ioremap); -/** - * devm_ioremap_nocache - Managed ioremap_nocache() - * @dev: Generic device to remap IO address for - * @offset: BUS offset to map - * @size: Size of map - * - * Managed ioremap_nocache(). Map is automatically unmapped on driver - * detach. - */ +void __iomem *devm_ioremap_cache(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return devm_ioremap_type(dev, offset, size, ioremap_cache); +} +EXPORT_SYMBOL(devm_ioremap_cache); + void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, resource_size_t size) { - void __iomem **ptr, *addr; - - ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return NULL; - - addr = ioremap_nocache(offset, size); - if (addr) { - *ptr = addr; - devres_add(dev, ptr); - } else - devres_free(ptr); - - return addr; + return devm_ioremap_type(dev, offset, size, ioremap_nocache); } EXPORT_SYMBOL(devm_ioremap_nocache); @@ -153,8 +147,11 @@ void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res) return IOMEM_ERR_PTR(-EBUSY); } - /* FIXME: add devm_ioremap_cache support */ - dest_ptr = devm_ioremap(dev, res->start, size); + if (res->flags & IORESOURCE_CACHEABLE) + dest_ptr = devm_ioremap_cache(dev, res->start, size); + else + dest_ptr = devm_ioremap_nocache(dev, res->start, size); + if (!dest_ptr) { dev_err(dev, "ioremap failed for resource %pR\n", res); devm_release_mem_region(dev, res->start, size); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com> To: arnd@arndb.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, tglx@linutronix.de, ross.zwisler@linux.intel.com, akpm@linux-foundation.org Cc: jgross@suse.com, x86@kernel.org, toshi.kani@hp.com, linux-nvdimm@ml01.01.org, benh@kernel.crashing.org, mcgrof@suse.com, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, stefan.bader@canonical.com, luto@amacapital.net, linux-mm@kvack.org, geert@linux-m68k.org, ralf@linux-mips.org, hmh@hmh.eng.br, mpe@ellerman.id.au, tj@kernel.org, paulus@samba.org, hch@lst.de Subject: [PATCH v3 4/6] devm: fix ioremap_cache() usage Date: Wed, 03 Jun 2015 17:34:34 -0400 [thread overview] Message-ID: <20150603213434.13749.46518.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <20150603211948.13749.85816.stgit@dwillia2-desk3.amr.corp.intel.com> Provide devm_ioremap_cache() and fix up devm_ioremap_resource() to actually provide cacheable mappings. On archs that implement ioremap_cache() devm_ioremap_resource() is always silently falling back to uncached when IORESOURCE_CACHEABLE is specified. Cc: Toshi Kani <toshi.kani@hp.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- include/linux/io.h | 2 ++ lib/devres.c | 53 +++++++++++++++++++++++++--------------------------- 2 files changed, 27 insertions(+), 28 deletions(-) diff --git a/include/linux/io.h b/include/linux/io.h index 04cce4da3685..1c9ad4c6d485 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -70,6 +70,8 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, resource_size_t size); +void __iomem *devm_ioremap_cache(struct device *dev, resource_size_t offset, + resource_size_t size); void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, resource_size_t size); void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, diff --git a/lib/devres.c b/lib/devres.c index f4001d90d24d..c8e75cdaf816 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -14,6 +14,8 @@ static int devm_ioremap_match(struct device *dev, void *res, void *match_data) return *(void **)res == match_data; } +typedef void __iomem *(*ioremap_fn)(resource_size_t offset, unsigned long size); + /** * devm_ioremap - Managed ioremap() * @dev: Generic device to remap IO address for @@ -22,8 +24,9 @@ static int devm_ioremap_match(struct device *dev, void *res, void *match_data) * * Managed ioremap(). Map is automatically unmapped on driver detach. */ -void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, - resource_size_t size) +static void __iomem *devm_ioremap_type(struct device *dev, + resource_size_t offset, resource_size_t size, + ioremap_fn ioremap_type) { void __iomem **ptr, *addr; @@ -31,7 +34,7 @@ void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, if (!ptr) return NULL; - addr = ioremap(offset, size); + addr = ioremap_type(offset, size); if (addr) { *ptr = addr; devres_add(dev, ptr); @@ -40,34 +43,25 @@ void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, return addr; } + +void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return devm_ioremap_type(dev, offset, size, ioremap); +} EXPORT_SYMBOL(devm_ioremap); -/** - * devm_ioremap_nocache - Managed ioremap_nocache() - * @dev: Generic device to remap IO address for - * @offset: BUS offset to map - * @size: Size of map - * - * Managed ioremap_nocache(). Map is automatically unmapped on driver - * detach. - */ +void __iomem *devm_ioremap_cache(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return devm_ioremap_type(dev, offset, size, ioremap_cache); +} +EXPORT_SYMBOL(devm_ioremap_cache); + void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, resource_size_t size) { - void __iomem **ptr, *addr; - - ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return NULL; - - addr = ioremap_nocache(offset, size); - if (addr) { - *ptr = addr; - devres_add(dev, ptr); - } else - devres_free(ptr); - - return addr; + return devm_ioremap_type(dev, offset, size, ioremap_nocache); } EXPORT_SYMBOL(devm_ioremap_nocache); @@ -153,8 +147,11 @@ void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res) return IOMEM_ERR_PTR(-EBUSY); } - /* FIXME: add devm_ioremap_cache support */ - dest_ptr = devm_ioremap(dev, res->start, size); + if (res->flags & IORESOURCE_CACHEABLE) + dest_ptr = devm_ioremap_cache(dev, res->start, size); + else + dest_ptr = devm_ioremap_nocache(dev, res->start, size); + if (!dest_ptr) { dev_err(dev, "ioremap failed for resource %pR\n", res); devm_release_mem_region(dev, res->start, size);
next prev parent reply other threads:[~2015-06-03 21:34 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-06-03 21:34 [PATCH v3 0/6] pmem api, generic ioremap_cache, and memremap Dan Williams 2015-06-03 21:34 ` Dan Williams 2015-06-03 21:34 ` [PATCH v3 1/6] arch: unify ioremap prototypes and macro aliases Dan Williams 2015-06-03 21:34 ` Dan Williams 2015-06-03 21:34 ` [PATCH v3 2/6] cleanup IORESOURCE_CACHEABLE vs ioremap() Dan Williams 2015-06-03 21:34 ` Dan Williams 2015-06-03 23:58 ` Dan Williams 2015-06-03 23:58 ` Dan Williams 2015-06-03 21:34 ` [PATCH v3 3/6] arch/*/asm/io.h: add ioremap_cache() to all architectures Dan Williams 2015-06-03 21:34 ` Dan Williams 2015-06-03 21:34 ` Dan Williams [this message] 2015-06-03 21:34 ` [PATCH v3 4/6] devm: fix ioremap_cache() usage Dan Williams 2015-06-03 21:34 ` [PATCH v3 5/6] arch: introduce memremap_cache() and memremap_wt() Dan Williams 2015-06-03 21:34 ` Dan Williams 2015-06-08 16:27 ` Andy Shevchenko 2015-06-08 16:27 ` Andy Shevchenko 2015-06-08 18:25 ` Dan Williams 2015-06-08 18:25 ` Dan Williams 2015-06-08 19:04 ` Andy Shevchenko 2015-06-08 19:04 ` Andy Shevchenko 2015-06-08 19:39 ` Dan Williams 2015-06-08 19:39 ` Dan Williams 2015-06-03 21:34 ` [PATCH v3 6/6] arch, x86: pmem api for ensuring durability of persistent memory updates Dan Williams 2015-06-03 21:34 ` Dan Williams 2015-06-03 21:38 ` [PATCH v3 0/6] pmem api, generic ioremap_cache, and memremap Dan Williams 2015-06-03 21:38 ` Dan Williams
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