mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 16:06:42 +07:00
ec04b07584
Implement pcim_iounmap_regions() - the opposite of pcim_iomap_regions(). Signed-off-by: Tejun heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
327 lines
7.1 KiB
C
327 lines
7.1 KiB
C
#include <linux/pci.h>
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#include <linux/io.h>
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#include <linux/module.h>
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static void devm_ioremap_release(struct device *dev, void *res)
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{
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iounmap(*(void __iomem **)res);
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}
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static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
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{
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return *(void **)res == match_data;
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}
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/**
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* devm_ioremap - Managed ioremap()
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* @dev: Generic device to remap IO address for
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* @offset: BUS offset to map
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* @size: Size of map
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*
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* Managed ioremap(). Map is automatically unmapped on driver detach.
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*/
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void __iomem *devm_ioremap(struct device *dev, unsigned long offset,
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unsigned long size)
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{
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void __iomem **ptr, *addr;
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ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
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if (!ptr)
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return NULL;
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addr = ioremap(offset, size);
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if (addr) {
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*ptr = addr;
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devres_add(dev, ptr);
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} else
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devres_free(ptr);
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return addr;
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}
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EXPORT_SYMBOL(devm_ioremap);
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/**
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* devm_ioremap_nocache - Managed ioremap_nocache()
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* @dev: Generic device to remap IO address for
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* @offset: BUS offset to map
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* @size: Size of map
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*
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* Managed ioremap_nocache(). Map is automatically unmapped on driver
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* detach.
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*/
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void __iomem *devm_ioremap_nocache(struct device *dev, unsigned long offset,
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unsigned long size)
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{
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void __iomem **ptr, *addr;
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ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
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if (!ptr)
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return NULL;
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addr = ioremap_nocache(offset, size);
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if (addr) {
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*ptr = addr;
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devres_add(dev, ptr);
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} else
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devres_free(ptr);
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return addr;
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}
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EXPORT_SYMBOL(devm_ioremap_nocache);
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/**
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* devm_iounmap - Managed iounmap()
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* @dev: Generic device to unmap for
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* @addr: Address to unmap
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*
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* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
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*/
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void devm_iounmap(struct device *dev, void __iomem *addr)
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{
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iounmap(addr);
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WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
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(void *)addr));
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}
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EXPORT_SYMBOL(devm_iounmap);
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#ifdef CONFIG_HAS_IOPORT
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/*
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* Generic iomap devres
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*/
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static void devm_ioport_map_release(struct device *dev, void *res)
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{
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ioport_unmap(*(void __iomem **)res);
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}
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static int devm_ioport_map_match(struct device *dev, void *res,
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void *match_data)
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{
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return *(void **)res == match_data;
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}
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/**
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* devm_ioport_map - Managed ioport_map()
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* @dev: Generic device to map ioport for
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* @port: Port to map
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* @nr: Number of ports to map
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*
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* Managed ioport_map(). Map is automatically unmapped on driver
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* detach.
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*/
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void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
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unsigned int nr)
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{
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void __iomem **ptr, *addr;
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ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
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if (!ptr)
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return NULL;
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addr = ioport_map(port, nr);
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if (addr) {
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*ptr = addr;
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devres_add(dev, ptr);
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} else
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devres_free(ptr);
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return addr;
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}
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EXPORT_SYMBOL(devm_ioport_map);
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/**
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* devm_ioport_unmap - Managed ioport_unmap()
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* @dev: Generic device to unmap for
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* @addr: Address to unmap
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*
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* Managed ioport_unmap(). @addr must have been mapped using
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* devm_ioport_map().
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*/
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void devm_ioport_unmap(struct device *dev, void __iomem *addr)
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{
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ioport_unmap(addr);
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WARN_ON(devres_destroy(dev, devm_ioport_map_release,
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devm_ioport_map_match, (void *)addr));
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}
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EXPORT_SYMBOL(devm_ioport_unmap);
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#ifdef CONFIG_PCI
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/*
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* PCI iomap devres
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*/
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#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
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struct pcim_iomap_devres {
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void __iomem *table[PCIM_IOMAP_MAX];
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};
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static void pcim_iomap_release(struct device *gendev, void *res)
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{
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struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
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struct pcim_iomap_devres *this = res;
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int i;
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for (i = 0; i < PCIM_IOMAP_MAX; i++)
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if (this->table[i])
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pci_iounmap(dev, this->table[i]);
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}
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/**
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* pcim_iomap_table - access iomap allocation table
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* @pdev: PCI device to access iomap table for
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*
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* Access iomap allocation table for @dev. If iomap table doesn't
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* exist and @pdev is managed, it will be allocated. All iomaps
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* recorded in the iomap table are automatically unmapped on driver
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* detach.
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*
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* This function might sleep when the table is first allocated but can
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* be safely called without context and guaranteed to succed once
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* allocated.
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*/
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void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
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{
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struct pcim_iomap_devres *dr, *new_dr;
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dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
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if (dr)
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return dr->table;
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new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
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if (!new_dr)
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return NULL;
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dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
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return dr->table;
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}
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EXPORT_SYMBOL(pcim_iomap_table);
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/**
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* pcim_iomap - Managed pcim_iomap()
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* @pdev: PCI device to iomap for
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* @bar: BAR to iomap
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* @maxlen: Maximum length of iomap
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*
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* Managed pci_iomap(). Map is automatically unmapped on driver
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* detach.
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*/
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void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
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{
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void __iomem **tbl;
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BUG_ON(bar >= PCIM_IOMAP_MAX);
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tbl = (void __iomem **)pcim_iomap_table(pdev);
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if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
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return NULL;
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tbl[bar] = pci_iomap(pdev, bar, maxlen);
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return tbl[bar];
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}
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EXPORT_SYMBOL(pcim_iomap);
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/**
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* pcim_iounmap - Managed pci_iounmap()
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* @pdev: PCI device to iounmap for
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* @addr: Address to unmap
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*
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* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
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*/
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void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
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{
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void __iomem **tbl;
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int i;
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pci_iounmap(pdev, addr);
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tbl = (void __iomem **)pcim_iomap_table(pdev);
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BUG_ON(!tbl);
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for (i = 0; i < PCIM_IOMAP_MAX; i++)
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if (tbl[i] == addr) {
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tbl[i] = NULL;
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return;
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}
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WARN_ON(1);
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}
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EXPORT_SYMBOL(pcim_iounmap);
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/**
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* pcim_iomap_regions - Request and iomap PCI BARs
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* @pdev: PCI device to map IO resources for
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* @mask: Mask of BARs to request and iomap
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* @name: Name used when requesting regions
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*
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* Request and iomap regions specified by @mask.
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*/
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int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name)
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{
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void __iomem * const *iomap;
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int i, rc;
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iomap = pcim_iomap_table(pdev);
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if (!iomap)
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return -ENOMEM;
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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unsigned long len;
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if (!(mask & (1 << i)))
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continue;
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rc = -EINVAL;
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len = pci_resource_len(pdev, i);
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if (!len)
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goto err_inval;
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rc = pci_request_region(pdev, i, name);
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if (rc)
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goto err_inval;
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rc = -ENOMEM;
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if (!pcim_iomap(pdev, i, 0))
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goto err_region;
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}
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return 0;
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err_region:
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pci_release_region(pdev, i);
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err_inval:
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while (--i >= 0) {
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if (!(mask & (1 << i)))
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continue;
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pcim_iounmap(pdev, iomap[i]);
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pci_release_region(pdev, i);
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}
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return rc;
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}
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EXPORT_SYMBOL(pcim_iomap_regions);
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/**
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* pcim_iounmap_regions - Unmap and release PCI BARs
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* @pdev: PCI device to map IO resources for
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* @mask: Mask of BARs to unmap and release
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*
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* Unamp and release regions specified by @mask.
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*/
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void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask)
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{
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void __iomem * const *iomap;
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int i;
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iomap = pcim_iomap_table(pdev);
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if (!iomap)
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return;
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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if (!(mask & (1 << i)))
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continue;
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pcim_iounmap(pdev, iomap[i]);
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pci_release_region(pdev, i);
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}
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}
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EXPORT_SYMBOL(pcim_iounmap_regions);
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#endif
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#endif
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