GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 4.8 |
i386 |
 |
pciconfig_write(2) |
 |
pciconfig_read, pciconfig_write, pciconfig_iobase − pci device information handling
#include <pci.h>
int
pciconfig_read(unsigned long bus, unsigned
long dfn,
unsigned long off, unsigned long
len, void *buf);
int pciconfig_write(unsigned long bus,
unsigned long dfn,
unsigned long off, unsigned long
len, void *buf);
int pciconfig_iobase(long which, unsigned
long bus,
unsigned long devfn);
Most of the
interaction with PCI devices is already handled by the
kernel PCI layer, and thus these calls should not normally
need to be
accessed from userspace.
pciconfig_read
Reads to buf from device dev at offset off value.
pciconfig_write
Writes from buf to device dev at offset off value.
pciconfig_iobase
You pass it a bus/devfn pair and get a physical address for either the memory offset (for things like prep, this is 0xc0000000), the IO base for PIO cycles, or the ISA holes if any.
pciconfig_read
On success zero is returned. On error, -1 is returned and errno is set appropriately.
pciconfig_write
On success zero is returned. On error, -1 is returned and errno is set appropriately.
pciconfig_iobase
Returns information on locations of various I/O regions in physical memory according to the which value. Values for which are: IOBASE_BRIDGE_NUMBER, IOBASE_MEMORY, IOBASE_IO, IOBASE_ISA_IO, IOBASE_ISA_MEM.
|
ENOSYS |
The system has not implemented these calls (CONFIG_PCI not defined). | ||
|
EPERM |
User does not have the CAP_SYS_ADMIN capability. This does not apply to pci_iobase. | ||
|
ENODEV |
For pci_iobase, hose value is NULL? For the other calls, could not find a slot. | ||
|
EINVAL |
len value is invalid. This does not apply to pci_iobase. | ||
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EIO |
I/O error. |
EOPNOTSUPP
This return value is only valid for pci_iobase. It is returned if the value for which is invalid.
These calls are Linux specific, available since Linux 2.0.26/2.1.11.
|
pciconfig_write(2) | |