Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400// SPDX-License-Identifier: GPL-2.0#include <linux/bug.h>#include <linux/device.h>#include <linux/errno.h>#include <linux/export.h>#include <linux/gfp_types.h>#include <linux/io.h>#include <linux/ioport.h>#include <linux/of_address.h>#include <linux/types.h>
enum devm_ioremap_type { DEVM_IOREMAP = 0, DEVM_IOREMAP_UC, DEVM_IOREMAP_WC, DEVM_IOREMAP_NP,};
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;}
static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset, resource_size_t size, enum devm_ioremap_type type){ void __iomem **ptr, *addr = NULL;
ptr = devres_alloc_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL, dev_to_node(dev)); if (!ptr) return NULL;
switch (type) { case DEVM_IOREMAP: addr = ioremap(offset, size); break; case DEVM_IOREMAP_UC: addr = ioremap_uc(offset, size); break; case DEVM_IOREMAP_WC: addr = ioremap_wc(offset, size); break; case DEVM_IOREMAP_NP: addr = ioremap_np(offset, size); break; }
if (addr) { *ptr = addr; devres_add(dev, ptr); } else devres_free(ptr);
return addr;}
/** * devm_ioremap - Managed ioremap() * @dev: Generic device to remap IO address for * @offset: Resource address to map * @size: Size of map * * Managed ioremap(). Map is automatically unmapped on driver detach. */void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, resource_size_t size){ return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);}EXPORT_SYMBOL(devm_ioremap);
/** * devm_ioremap_uc - Managed ioremap_uc() * @dev: Generic device to remap IO address for * @offset: Resource address to map * @size: Size of map * * Managed ioremap_uc(). Map is automatically unmapped on driver detach. */void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset, resource_size_t size){ return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);}EXPORT_SYMBOL_GPL(devm_ioremap_uc);
/** * devm_ioremap_wc - Managed ioremap_wc() * @dev: Generic device to remap IO address for * @offset: Resource address to map * @size: Size of map * * Managed ioremap_wc(). Map is automatically unmapped on driver detach. */void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, resource_size_t size){ return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);}EXPORT_SYMBOL(devm_ioremap_wc);
/** * 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){ WARN_ON(devres_release(dev, devm_ioremap_release, devm_ioremap_match, (__force void *)addr));}EXPORT_SYMBOL(devm_iounmap);
static void __iomem *__devm_ioremap_resource(struct device *dev, const struct resource *res, enum devm_ioremap_type type){ resource_size_t size; void __iomem *dest_ptr; char *pretty_name; int ret;
BUG_ON(!dev);
if (!res || resource_type(res) != IORESOURCE_MEM) { ret = dev_err_probe(dev, -EINVAL, "invalid resource %pR\n", res); return IOMEM_ERR_PTR(ret); }
if (type == DEVM_IOREMAP && res->flags & IORESOURCE_MEM_NONPOSTED) type = DEVM_IOREMAP_NP;
size = resource_size(res);
if (res->name) pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s", dev_name(dev), res->name); else pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL); if (!pretty_name) { ret = dev_err_probe(dev, -ENOMEM, "can't generate pretty name for resource %pR\n", res); return IOMEM_ERR_PTR(ret); }
if (!devm_request_mem_region(dev, res->start, size, pretty_name)) { ret = dev_err_probe(dev, -EBUSY, "can't request region for resource %pR\n", res); return IOMEM_ERR_PTR(ret); }
dest_ptr = __devm_ioremap(dev, res->start, size, type); if (!dest_ptr) { devm_release_mem_region(dev, res->start, size); ret = dev_err_probe(dev, -ENOMEM, "ioremap failed for resource %pR\n", res); return IOMEM_ERR_PTR(ret); }
return dest_ptr;}
/** * devm_ioremap_resource() - check, request region, and ioremap resource * @dev: generic device to handle the resource for * @res: resource to be handled * * Checks that a resource is a valid memory region, requests the memory * region and ioremaps it. All operations are managed and will be undone * on driver detach. * * Usage example: * * res = platform_get_resource(pdev, IORESOURCE_MEM, 0); * base = devm_ioremap_resource(&pdev->dev, res); * if (IS_ERR(base)) * return PTR_ERR(base); * * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code * on failure. */void __iomem *devm_ioremap_resource(struct device *dev, const struct resource *res){ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);}EXPORT_SYMBOL(devm_ioremap_resource);
/** * devm_ioremap_resource_wc() - write-combined variant of * devm_ioremap_resource() * @dev: generic device to handle the resource for * @res: resource to be handled * * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code * on failure. */void __iomem *devm_ioremap_resource_wc(struct device *dev, const struct resource *res){ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);}EXPORT_SYMBOL(devm_ioremap_resource_wc);
/* * devm_of_iomap - Requests a resource and maps the memory mapped IO * for a given device_node managed by a given device * * Checks that a resource is a valid memory region, requests the memory * region and ioremaps it. All operations are managed and will be undone * on driver detach of the device. * * This is to be used when a device requests/maps resources described * by other device tree nodes (children or otherwise). * * @dev: The device "managing" the resource * @node: The device-tree node where the resource resides * @index: index of the MMIO range in the "reg" property * @size: Returns the size of the resource (pass NULL if not needed) * * Usage example: * * base = devm_of_iomap(&pdev->dev, node, 0, NULL); * if (IS_ERR(base)) * return PTR_ERR(base); * * Please Note: This is not a one-to-one replacement for of_iomap() because the * of_iomap() function does not track whether the region is already mapped. If * two drivers try to map the same memory, the of_iomap() function will succeed * but the devm_of_iomap() function will return -EBUSY. * * Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded * error code on failure. */void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index, resource_size_t *size){ struct resource res;
if (of_address_to_resource(node, index, &res)) return IOMEM_ERR_PTR(-EINVAL); if (size) *size = resource_size(&res); return devm_ioremap_resource(dev, &res);}EXPORT_SYMBOL(devm_of_iomap);
#ifdef CONFIG_HAS_IOPORT_MAP/* * 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. * * Return: a pointer to the remapped memory or NULL on failure. */void __iomem *devm_ioport_map(struct device *dev, unsigned long port, unsigned int nr){ void __iomem **ptr, *addr;
ptr = devres_alloc_node(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL, dev_to_node(dev)); 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){ WARN_ON(devres_release(dev, devm_ioport_map_release, devm_ioport_map_match, (__force void *)addr));}EXPORT_SYMBOL(devm_ioport_unmap);#endif /* CONFIG_HAS_IOPORT_MAP */
static void devm_arch_phys_ac_add_release(struct device *dev, void *res){ arch_phys_wc_del(*((int *)res));}
/** * devm_arch_phys_wc_add - Managed arch_phys_wc_add() * @dev: Managed device * @base: Memory base address * @size: Size of memory range * * Adds a WC MTRR using arch_phys_wc_add() and sets up a release callback. * See arch_phys_wc_add() for more information. */int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long size){ int *mtrr; int ret;
mtrr = devres_alloc_node(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL, dev_to_node(dev)); if (!mtrr) return -ENOMEM;
ret = arch_phys_wc_add(base, size); if (ret < 0) { devres_free(mtrr); return ret; }
*mtrr = ret; devres_add(dev, mtrr);
return ret;}EXPORT_SYMBOL(devm_arch_phys_wc_add);
struct arch_io_reserve_memtype_wc_devres { resource_size_t start; resource_size_t size;};
static void devm_arch_io_free_memtype_wc_release(struct device *dev, void *res){ const struct arch_io_reserve_memtype_wc_devres *this = res;
arch_io_free_memtype_wc(this->start, this->size);}
/** * devm_arch_io_reserve_memtype_wc - Managed arch_io_reserve_memtype_wc() * @dev: Managed device * @start: Memory base address * @size: Size of memory range * * Reserves a memory range with WC caching using arch_io_reserve_memtype_wc() * and sets up a release callback See arch_io_reserve_memtype_wc() for more * information. */int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start, resource_size_t size){ struct arch_io_reserve_memtype_wc_devres *dr; int ret;
dr = devres_alloc_node(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL, dev_to_node(dev)); if (!dr) return -ENOMEM;
ret = arch_io_reserve_memtype_wc(start, size); if (ret < 0) { devres_free(dr); return ret; }
dr->start = start; dr->size = size; devres_add(dev, dr);
return ret;}EXPORT_SYMBOL(devm_arch_io_reserve_memtype_wc);