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pci_find_next_ext_capability(9) [centos man page]

PCI_FIND_NEXT_EXT_CA(9) 					Hardware Interfaces					   PCI_FIND_NEXT_EXT_CA(9)

NAME
pci_find_next_ext_capability - Find an extended capability SYNOPSIS
int pci_find_next_ext_capability(struct pci_dev * dev, int start, int cap); ARGUMENTS
dev PCI device to query start address at which to start looking (0 to start at beginning of list) cap capability code DESCRIPTION
Returns the address of the next matching extended capability structure within the device's PCI configuration space or 0 if the device does not support it. Some capabilities can occur several times, e.g., the vendor-specific capability, and this provides a way to find them all. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 PCI_FIND_NEXT_EXT_CA(9)

Check Out this Related Man Page

tran_getcap(9E)                                                 Driver Entry Points                                                tran_getcap(9E)

NAME
tran_getcap, tran_setcap - get/set SCSI transport capability SYNOPSIS
#include <sys/scsi/scsi.h> int prefixtran_getcap(struct scsi_address *ap, char *cap, int whom); int prefixtran_setcap(struct scsi_address *ap, char *cap, int value, int whom); INTERFACE LEVEL
Solaris architecture specific (Solaris DDI). PARAMETERS
ap Pointer to the scsi_address(9S) structure. cap Pointer to the string capability identifier. value Defines the new state of the capability. whom Specifies whether all targets or only the specified target is affected. DESCRIPTION
The tran_getcap() and tran_setcap() vectors in the scsi_hba_tran(9S) structure must be initialized during the HBA driver's attach(9E) to point to HBA entry points to be called when a target driver calls scsi_ifgetcap(9F) and scsi_ifsetcap(9F). tran_getcap() is called to get the current value of a capability specific to features provided by the HBA hardware or driver. The name of the capability cap is the NULL terminated capability string. If whom is non-zero, the request is for the current value of the capability defined for the target specified by the scsi_address(9S) structure pointed to by ap; if whom is 0, all targets are affected; else, the target specified by the scsi_address structure pointed to by ap is affected. tran_setcap() is called to set the value of the capability cap to the value of value. If whom is non-zero, the capability should be set for the target specified by the scsi_address(9S) structure pointed to by ap; if whom is 0, all targets are affected; else, the target specified by the scsi_address structure pointed to by ap is affected. It is recommended that HBA drivers do not support setting capabilities for all targets, that is, whom is 0. A device may support only a subset of the defined capabilities. Refer to scsi_ifgetcap(9F) for the list of defined capabilities. HBA drivers should use scsi_hba_lookup_capstr(9F) to match cap against the canonical capability strings. RETURN VALUES
tran_setcap() must return 1 if the capability was successfully set to the new value, 0 if the HBA driver does not support changing the capability, and -1 if the capability was not defined. tran_getcap() must return the current value of a capability or -1 if the capability was not defined. SEE ALSO
attach(9E), scsi_hba_attach(9F), scsi_hba_lookup_capstr(9F), scsi_ifgetcap(9F), scsi_address(9S), scsi_hba_tran(9S) Writing Device Drivers SunOS 5.10 30 Aug 1995 tran_getcap(9E)
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