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[pci] Allow probing permission to vary by range

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Make pci_can_probe() part of the runtime selectable PCI I/O API, and
defer this check to the per-range API.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-11-24 23:09:53 +00:00
parent ff1a17dc7e
commit 9c1ac48bcf
10 changed files with 33 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/include/ipxe/ecam_io.h
View File

@@ -139,10 +139,11 @@ PCIAPI_INLINE ( ecam, pci_ioremap ) ( struct pci_device *pci __unused,
/**
* Check if PCI bus probing is allowed
*
* @v pci PCI device
* @ret ok Bus probing is allowed
*/
static inline __always_inline int
PCIAPI_INLINE ( ecam, pci_can_probe ) ( void ) {
PCIAPI_INLINE ( ecam, pci_can_probe ) ( struct pci_device *pci __unused ) {
return 1;
}

3
src/include/ipxe/efi/efi_pci_api.h
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@@ -35,10 +35,11 @@ extern int efipci_write ( struct pci_device *pci, unsigned long location,
/**
* Check if PCI bus probing is allowed
*
* @v pci PCI device
* @ret ok Bus probing is allowed
*/
static inline __always_inline int
PCIAPI_INLINE ( efi, pci_can_probe ) ( void ) {
PCIAPI_INLINE ( efi, pci_can_probe ) ( struct pci_device *pci __unused ) {
return 0;
}

3
src/include/ipxe/linux/linux_pci.h
View File

@@ -25,10 +25,11 @@ extern int linux_pci_write ( struct pci_device *pci, unsigned long where,
/**
* Check if PCI bus probing is allowed
*
* @v pci PCI device
* @ret ok Bus probing is allowed
*/
static inline __always_inline int
PCIAPI_INLINE ( linux, pci_can_probe ) ( void ) {
PCIAPI_INLINE ( linux, pci_can_probe ) ( struct pci_device *pci __unused ) {
return 1;
}

3
src/include/ipxe/null_pci.h
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@@ -22,10 +22,11 @@ struct pci_device;
/**
* Check if PCI bus probing is allowed
*
* @v pci PCI device
* @ret ok Bus probing is allowed
*/
static inline __always_inline int
PCIAPI_INLINE ( null, pci_can_probe ) ( void ) {
PCIAPI_INLINE ( null, pci_can_probe ) ( struct pci_device *pci __unused ) {
return 0;
}

5
src/include/ipxe/pci_io.h
View File

@@ -72,9 +72,10 @@ struct pci_range {
/**
* Check if PCI bus probing is allowed
*
* @v pci PCI device
* @ret ok Bus probing is allowed
*/
int pci_can_probe ( void );
int pci_can_probe ( struct pci_device *pci );
/**
* Find next PCI bus:dev.fn address range in system
@@ -163,6 +164,7 @@ void * pci_ioremap ( struct pci_device *pci, unsigned long bus_addr,
/** A runtime selectable PCI I/O API */
struct pci_api {
const char *name;
typeof ( pci_can_probe ) ( * pci_can_probe );
typeof ( pci_discover ) ( * pci_discover );
typeof ( pci_read_config_byte ) ( * pci_read_config_byte );
typeof ( pci_read_config_word ) ( * pci_read_config_word );
@@ -198,6 +200,7 @@ struct pci_api {
#define PROVIDE_PCIAPI_RUNTIME( subsys, priority ) \
struct pci_api pciapi_ ## subsys __pci_api ( priority ) = { \
.name = #subsys, \
.pci_can_probe = PCIAPI_INLINE ( subsys, pci_can_probe ), \
.pci_discover = PCIAPI_INLINE ( subsys, pci_discover ), \
.pci_read_config_byte = \
PCIAPI_INLINE ( subsys, pci_read_config_byte ), \

10
src/include/ipxe/pcicloud.h
View File

@@ -15,14 +15,4 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define PCIAPI_PREFIX_cloud __cloud_
#endif
/**
* Check if PCI bus probing is allowed
*
* @ret ok Bus probing is allowed
*/
static inline __always_inline int
PCIAPI_INLINE ( cloud, pci_can_probe ) ( void ) {
return 1;
}
#endif /* _IPXE_PCICLOUD_H */