mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
506 lines
12 KiB
506 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
#include <linux/err.h> |
|
#include <linux/pci.h> |
|
#include <linux/io.h> |
|
#include <linux/gfp.h> |
|
#include <linux/export.h> |
|
#include <linux/of_address.h> |
|
|
|
enum devm_ioremap_type { |
|
DEVM_IOREMAP = 0, |
|
DEVM_IOREMAP_UC, |
|
DEVM_IOREMAP_WC, |
|
}; |
|
|
|
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(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); |
|
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; |
|
} |
|
|
|
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_destroy(dev, devm_ioremap_release, devm_ioremap_match, |
|
(__force void *)addr)); |
|
iounmap(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; |
|
|
|
BUG_ON(!dev); |
|
|
|
if (!res || resource_type(res) != IORESOURCE_MEM) { |
|
dev_err(dev, "invalid resource\n"); |
|
return IOMEM_ERR_PTR(-EINVAL); |
|
} |
|
|
|
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) |
|
return IOMEM_ERR_PTR(-ENOMEM); |
|
|
|
if (!devm_request_mem_region(dev, res->start, size, pretty_name)) { |
|
dev_err(dev, "can't request region for resource %pR\n", res); |
|
return IOMEM_ERR_PTR(-EBUSY); |
|
} |
|
|
|
dest_ptr = __devm_ioremap(dev, res->start, size, type); |
|
if (!dest_ptr) { |
|
dev_err(dev, "ioremap failed for resource %pR\n", res); |
|
devm_release_mem_region(dev, res->start, size); |
|
dest_ptr = IOMEM_ERR_PTR(-ENOMEM); |
|
} |
|
|
|
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); |
|
} |
|
|
|
/* |
|
* 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(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, (__force void *)addr)); |
|
} |
|
EXPORT_SYMBOL(devm_ioport_unmap); |
|
#endif /* CONFIG_HAS_IOPORT_MAP */ |
|
|
|
#ifdef CONFIG_PCI |
|
/* |
|
* PCI iomap devres |
|
*/ |
|
#define PCIM_IOMAP_MAX PCI_STD_NUM_BARS |
|
|
|
struct pcim_iomap_devres { |
|
void __iomem *table[PCIM_IOMAP_MAX]; |
|
}; |
|
|
|
static void pcim_iomap_release(struct device *gendev, void *res) |
|
{ |
|
struct pci_dev *dev = to_pci_dev(gendev); |
|
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, int 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); |
|
|
|
/** |
|
* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones |
|
* @pdev: PCI device to map IO resources for |
|
* @mask: Mask of BARs to iomap |
|
* @name: Name used when requesting regions |
|
* |
|
* Request all PCI BARs and iomap regions specified by @mask. |
|
*/ |
|
int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, |
|
const char *name) |
|
{ |
|
int request_mask = ((1 << 6) - 1) & ~mask; |
|
int rc; |
|
|
|
rc = pci_request_selected_regions(pdev, request_mask, name); |
|
if (rc) |
|
return rc; |
|
|
|
rc = pcim_iomap_regions(pdev, mask, name); |
|
if (rc) |
|
pci_release_selected_regions(pdev, request_mask); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL(pcim_iomap_regions_request_all); |
|
|
|
/** |
|
* pcim_iounmap_regions - Unmap and release PCI BARs |
|
* @pdev: PCI device to map IO resources for |
|
* @mask: Mask of BARs to unmap and release |
|
* |
|
* Unmap and release regions specified by @mask. |
|
*/ |
|
void pcim_iounmap_regions(struct pci_dev *pdev, int mask) |
|
{ |
|
void __iomem * const *iomap; |
|
int i; |
|
|
|
iomap = pcim_iomap_table(pdev); |
|
if (!iomap) |
|
return; |
|
|
|
for (i = 0; i < PCIM_IOMAP_MAX; i++) { |
|
if (!(mask & (1 << i))) |
|
continue; |
|
|
|
pcim_iounmap(pdev, iomap[i]); |
|
pci_release_region(pdev, i); |
|
} |
|
} |
|
EXPORT_SYMBOL(pcim_iounmap_regions); |
|
#endif /* CONFIG_PCI */
|
|
|