diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig | 9 | ||||
| -rw-r--r-- | lib/Makefile | 6 | ||||
| -rw-r--r-- | lib/devres.c | 300 | ||||
| -rw-r--r-- | lib/iomap.c | 296 |
4 files changed, 310 insertions, 301 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 9b03581cdec..38424991504 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -101,9 +101,14 @@ config TEXTSEARCH_FSM config PLIST boolean -config IOMAP_COPY +config HAS_IOMEM boolean - depends on !UML + depends on !NO_IOMEM + default y + +config HAS_IOPORT + boolean + depends on HAS_IOMEM && !NO_IOPORT default y endmenu diff --git a/lib/Makefile b/lib/Makefile index b819e37440d..992a39ef9ff 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -12,15 +12,15 @@ lib-$(CONFIG_SMP) += cpumask.o lib-y += kobject.o kref.o kobject_uevent.o klist.o -obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o iomap.o \ - bust_spinlocks.o +obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o bust_spinlocks.o ifeq ($(CONFIG_DEBUG_KOBJECT),y) CFLAGS_kobject.o += -DDEBUG CFLAGS_kobject_uevent.o += -DDEBUG endif -obj-$(CONFIG_IOMAP_COPY) += iomap_copy.o +obj-$(CONFIG_GENERIC_IOMAP) += iomap.o +obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o diff --git a/lib/devres.c b/lib/devres.c new file mode 100644 index 00000000000..2a668dd7cac --- /dev/null +++ b/lib/devres.c @@ -0,0 +1,300 @@ +#include <linux/pci.h> +#include <linux/io.h> +#include <linux/module.h> + +static void devm_ioremap_release(struct device *dev, void *res) +{ + iounmap(*(void __iomem **)res); +} + +static int devm_ioremap_match(struct device *dev, void *res, void *match_data) +{ + return *(void **)res == match_data; +} + +/** + * devm_ioremap - Managed ioremap() + * @dev: Generic device to remap IO address for + * @offset: BUS offset to map + * @size: Size of map + * + * Managed ioremap(). Map is automatically unmapped on driver detach. + */ +void __iomem *devm_ioremap(struct device *dev, unsigned long offset, + unsigned long size) +{ + void __iomem **ptr, *addr; + + ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return NULL; + + addr = ioremap(offset, size); + if (addr) { + *ptr = addr; + devres_add(dev, ptr); + } else + devres_free(ptr); + + return addr; +} +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_nocache(struct device *dev, unsigned long offset, + unsigned long 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; +} +EXPORT_SYMBOL(devm_ioremap_nocache); + +/** + * devm_iounmap - Managed iounmap() + * @dev: Generic device to unmap for + * @addr: Address to unmap + * + * Managed iounmap(). @addr must have been mapped using devm_ioremap*(). + */ +void devm_iounmap(struct device *dev, void __iomem *addr) +{ + iounmap(addr); + WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match, + (void *)addr)); +} +EXPORT_SYMBOL(devm_iounmap); + +#ifdef CONFIG_HAS_IOPORT +/* + * Generic iomap devres + */ +static void devm_ioport_map_release(struct device *dev, void *res) +{ + ioport_unmap(*(void __iomem **)res); +} + +static int devm_ioport_map_match(struct device *dev, void *res, + void *match_data) +{ + return *(void **)res == match_data; +} + +/** + * devm_ioport_map - Managed ioport_map() + * @dev: Generic device to map ioport for + * @port: Port to map + * @nr: Number of ports to map + * + * Managed ioport_map(). Map is automatically unmapped on driver + * detach. + */ +void __iomem * devm_ioport_map(struct device *dev, unsigned long port, + unsigned int nr) +{ + void __iomem **ptr, *addr; + + ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return NULL; + + addr = ioport_map(port, nr); + if (addr) { + *ptr = addr; + devres_add(dev, ptr); + } else + devres_free(ptr); + + return addr; +} +EXPORT_SYMBOL(devm_ioport_map); + +/** + * devm_ioport_unmap - Managed ioport_unmap() + * @dev: Generic device to unmap for + * @addr: Address to unmap + * + * Managed ioport_unmap(). @addr must have been mapped using + * devm_ioport_map(). + */ +void devm_ioport_unmap(struct device *dev, void __iomem *addr) +{ + ioport_unmap(addr); + WARN_ON(devres_destroy(dev, devm_ioport_map_release, + devm_ioport_map_match, (void *)addr)); +} +EXPORT_SYMBOL(devm_ioport_unmap); + +#ifdef CONFIG_PCI +/* + * PCI iomap devres + */ +#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE + +struct pcim_iomap_devres { + void __iomem *table[PCIM_IOMAP_MAX]; +}; + +static void pcim_iomap_release(struct device *gendev, void *res) +{ + struct pci_dev *dev = container_of(gendev, struct pci_dev, dev); + struct pcim_iomap_devres *this = res; + int i; + + for (i = 0; i < PCIM_IOMAP_MAX; i++) + if (this->table[i]) + pci_iounmap(dev, this->table[i]); +} + +/** + * pcim_iomap_table - access iomap allocation table + * @pdev: PCI device to access iomap table for + * + * Access iomap allocation table for @dev. If iomap table doesn't + * exist and @pdev is managed, it will be allocated. All iomaps + * recorded in the iomap table are automatically unmapped on driver + * detach. + * + * This function might sleep when the table is first allocated but can + * be safely called without context and guaranteed to succed once + * allocated. + */ +void __iomem * const * pcim_iomap_table(struct pci_dev *pdev) +{ + struct pcim_iomap_devres *dr, *new_dr; + + dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL); + if (dr) + return dr->table; + + new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL); + if (!new_dr) + return NULL; + dr = devres_get(&pdev->dev, new_dr, NULL, NULL); + return dr->table; +} +EXPORT_SYMBOL(pcim_iomap_table); + +/** + * pcim_iomap - Managed pcim_iomap() + * @pdev: PCI device to iomap for + * @bar: BAR to iomap + * @maxlen: Maximum length of iomap + * + * Managed pci_iomap(). Map is automatically unmapped on driver + * detach. + */ +void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen) +{ + void __iomem **tbl; + + BUG_ON(bar >= PCIM_IOMAP_MAX); + + tbl = (void __iomem **)pcim_iomap_table(pdev); + if (!tbl || tbl[bar]) /* duplicate mappings not allowed */ + return NULL; + + tbl[bar] = pci_iomap(pdev, bar, maxlen); + return tbl[bar]; +} +EXPORT_SYMBOL(pcim_iomap); + +/** + * pcim_iounmap - Managed pci_iounmap() + * @pdev: PCI device to iounmap for + * @addr: Address to unmap + * + * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap(). + */ +void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr) +{ + void __iomem **tbl; + int i; + + pci_iounmap(pdev, addr); + + tbl = (void __iomem **)pcim_iomap_table(pdev); + BUG_ON(!tbl); + + for (i = 0; i < PCIM_IOMAP_MAX; i++) + if (tbl[i] == addr) { + tbl[i] = NULL; + return; + } + WARN_ON(1); +} +EXPORT_SYMBOL(pcim_iounmap); + +/** + * pcim_iomap_regions - Request and iomap PCI BARs + * @pdev: PCI device to map IO resources for + * @mask: Mask of BARs to request and iomap + * @name: Name used when requesting regions + * + * Request and iomap regions specified by @mask. + */ +int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name) +{ + void __iomem * const *iomap; + int i, rc; + + iomap = pcim_iomap_table(pdev); + if (!iomap) + return -ENOMEM; + + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + unsigned long len; + + if (!(mask & (1 << i))) + continue; + + rc = -EINVAL; + len = pci_resource_len(pdev, i); + if (!len) + goto err_inval; + + rc = pci_request_region(pdev, i, name); + if (rc) + goto err_region; + + rc = -ENOMEM; + if (!pcim_iomap(pdev, i, 0)) + goto err_iomap; + } + + return 0; + + err_iomap: + pcim_iounmap(pdev, iomap[i]); + err_region: + pci_release_region(pdev, i); + err_inval: + while (--i >= 0) { + pcim_iounmap(pdev, iomap[i]); + pci_release_region(pdev, i); + } + + return rc; +} +EXPORT_SYMBOL(pcim_iomap_regions); +#endif +#endif diff --git a/lib/iomap.c b/lib/iomap.c index 4990c736bc4..4d43f37c015 100644 --- a/lib/iomap.c +++ b/lib/iomap.c @@ -6,7 +6,6 @@ #include <linux/pci.h> #include <linux/io.h> -#ifdef CONFIG_GENERIC_IOMAP #include <linux/module.h> /* @@ -256,298 +255,3 @@ void pci_iounmap(struct pci_dev *dev, void __iomem * addr) } EXPORT_SYMBOL(pci_iomap); EXPORT_SYMBOL(pci_iounmap); - -#endif /* CONFIG_GENERIC_IOMAP */ - -/* - * Generic iomap devres - */ -static void devm_ioport_map_release(struct device *dev, void *res) -{ - ioport_unmap(*(void __iomem **)res); -} - -static int devm_ioport_map_match(struct device *dev, void *res, - void *match_data) -{ - return *(void **)res == match_data; -} - -/** - * devm_ioport_map - Managed ioport_map() - * @dev: Generic device to map ioport for - * @port: Port to map - * @nr: Number of ports to map - * - * Managed ioport_map(). Map is automatically unmapped on driver - * detach. - */ -void __iomem * devm_ioport_map(struct device *dev, unsigned long port, - unsigned int nr) -{ - void __iomem **ptr, *addr; - - ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return NULL; - - addr = ioport_map(port, nr); - if (addr) { - *ptr = addr; - devres_add(dev, ptr); - } else - devres_free(ptr); - - return addr; -} -EXPORT_SYMBOL(devm_ioport_map); - -/** - * devm_ioport_unmap - Managed ioport_unmap() - * @dev: Generic device to unmap for - * @addr: Address to unmap - * - * Managed ioport_unmap(). @addr must have been mapped using - * devm_ioport_map(). - */ -void devm_ioport_unmap(struct device *dev, void __iomem *addr) -{ - ioport_unmap(addr); - WARN_ON(devres_destroy(dev, devm_ioport_map_release, - devm_ioport_map_match, (void *)addr)); -} -EXPORT_SYMBOL(devm_ioport_unmap); - -static void devm_ioremap_release(struct device *dev, void *res) -{ - iounmap(*(void __iomem **)res); -} - -static int devm_ioremap_match(struct device *dev, void *res, void *match_data) -{ - return *(void **)res == match_data; -} - -/** - * devm_ioremap - Managed ioremap() - * @dev: Generic device to remap IO address for - * @offset: BUS offset to map - * @size: Size of map - * - * Managed ioremap(). Map is automatically unmapped on driver detach. - */ -void __iomem *devm_ioremap(struct device *dev, unsigned long offset, - unsigned long size) -{ - void __iomem **ptr, *addr; - - ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return NULL; - - addr = ioremap(offset, size); - if (addr) { - *ptr = addr; - devres_add(dev, ptr); - } else - devres_free(ptr); - - return addr; -} -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_nocache(struct device *dev, unsigned long offset, - unsigned long 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; -} -EXPORT_SYMBOL(devm_ioremap_nocache); - -/** - * devm_iounmap - Managed iounmap() - * @dev: Generic device to unmap for - * @addr: Address to unmap - * - * Managed iounmap(). @addr must have been mapped using devm_ioremap*(). - */ -void devm_iounmap(struct device *dev, void __iomem *addr) -{ - iounmap(addr); - WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match, - (void *)addr)); -} -EXPORT_SYMBOL(devm_iounmap); - -/* - * PCI iomap devres - */ -#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE - -struct pcim_iomap_devres { - void __iomem *table[PCIM_IOMAP_MAX]; -}; - -static void pcim_iomap_release(struct device *gendev, void *res) -{ - struct pci_dev *dev = container_of(gendev, struct pci_dev, dev); - struct pcim_iomap_devres *this = res; - int i; - - for (i = 0; i < PCIM_IOMAP_MAX; i++) - if (this->table[i]) - pci_iounmap(dev, this->table[i]); -} - -/** - * pcim_iomap_table - access iomap allocation table - * @pdev: PCI device to access iomap table for - * - * Access iomap allocation table for @dev. If iomap table doesn't - * exist and @pdev is managed, it will be allocated. All iomaps - * recorded in the iomap table are automatically unmapped on driver - * detach. - * - * This function might sleep when the table is first allocated but can - * be safely called without context and guaranteed to succed once - * allocated. - */ -void __iomem * const * pcim_iomap_table(struct pci_dev *pdev) -{ - struct pcim_iomap_devres *dr, *new_dr; - - dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL); - if (dr) - return dr->table; - - new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL); - if (!new_dr) - return NULL; - dr = devres_get(&pdev->dev, new_dr, NULL, NULL); - return dr->table; -} -EXPORT_SYMBOL(pcim_iomap_table); - -/** - * pcim_iomap - Managed pcim_iomap() - * @pdev: PCI device to iomap for - * @bar: BAR to iomap - * @maxlen: Maximum length of iomap - * - * Managed pci_iomap(). Map is automatically unmapped on driver - * detach. - */ -void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen) -{ - void __iomem **tbl; - - BUG_ON(bar >= PCIM_IOMAP_MAX); - - tbl = (void __iomem **)pcim_iomap_table(pdev); - if (!tbl || tbl[bar]) /* duplicate mappings not allowed */ - return NULL; - - tbl[bar] = pci_iomap(pdev, bar, maxlen); - return tbl[bar]; -} -EXPORT_SYMBOL(pcim_iomap); - -/** - * pcim_iounmap - Managed pci_iounmap() - * @pdev: PCI device to iounmap for - * @addr: Address to unmap - * - * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap(). - */ -void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr) -{ - void __iomem **tbl; - int i; - - pci_iounmap(pdev, addr); - - tbl = (void __iomem **)pcim_iomap_table(pdev); - BUG_ON(!tbl); - - for (i = 0; i < PCIM_IOMAP_MAX; i++) - if (tbl[i] == addr) { - tbl[i] = NULL; - return; - } - WARN_ON(1); -} -EXPORT_SYMBOL(pcim_iounmap); - -/** - * pcim_iomap_regions - Request and iomap PCI BARs - * @pdev: PCI device to map IO resources for - * @mask: Mask of BARs to request and iomap - * @name: Name used when requesting regions - * - * Request and iomap regions specified by @mask. - */ -int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name) -{ - void __iomem * const *iomap; - int i, rc; - - iomap = pcim_iomap_table(pdev); - if (!iomap) - return -ENOMEM; - - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - unsigned long len; - - if (!(mask & (1 << i))) - continue; - - rc = -EINVAL; - len = pci_resource_len(pdev, i); - if (!len) - goto err_inval; - - rc = pci_request_region(pdev, i, name); - if (rc) - goto err_region; - - rc = -ENOMEM; - if (!pcim_iomap(pdev, i, 0)) - goto err_iomap; - } - - return 0; - - err_iomap: - pcim_iounmap(pdev, iomap[i]); - err_region: - pci_release_region(pdev, i); - err_inval: - while (--i >= 0) { - pcim_iounmap(pdev, iomap[i]); - pci_release_region(pdev, i); - } - - return rc; -} -EXPORT_SYMBOL(pcim_iomap_regions); |