#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_inval; rc = -ENOMEM; if (!pcim_iomap(pdev, i, 0)) goto err_region; } return 0; err_region: pci_release_region(pdev, i); err_inval: while (--i >= 0) { if (!(mask & (1 << i))) continue; pcim_iounmap(pdev, iomap[i]); pci_release_region(pdev, i); } return rc; } EXPORT_SYMBOL(pcim_iomap_regions); #endif #endif