pciv_vf_config(9F) Kernel Functions for Drivers pciv_vf_config(9F)NAMEpciv_vf_config - obtain and configure VF configuration parameters for a
device driver instance
SYNOPSIS
#include <sys/sunddi.h>
int pciv_vf_config(dev_info_t *dip, pciv_config_vf_t *vfcfg_p);
PARAMETERS
dip
pointer to a dev_info structure
vfcfg_p
pointer to a pciv_config_vf structure
typedef enum {
PCIV_VFCFG_PARAM,
PCIV_VF_ENABLE,
PCIV_EVT_VFENABLE_PRE,
PCIV_EVT_VFENABLE_POST,
PCIV_EVT_VFDISABLE_PRE,
PCIV_EVT_VFDISABLE_POST
} pciv_vf_config_cmd;
typedef struct pciv_config_vf {
int version;
pciv_vf_config_cmd cmd;
uint16_t num_vf;
uint16_t first_vf_offset;
uint16_t vf_stride;
boolean_t ari_cap;
uint32_t page_size;
} pciv_config_vf_t;
cmd pre/post VF Enable/Disable
num_vf number of VFs to be used
first_vf_offset offset between 1st VF and PF
vf_stride distance between VFs
ari_cap ARI-capable hierarchy
page_size system page size
DESCRIPTION
The pciv_vf_config() function is used by SR-IOV (Single-Root IO Virtu‐
alization) device PF (Physical Function) drivers to obtain VF
(Virtual Function) configuration parameters and to configure their VFs.
When the cmd field in set as PCIV_VFCFG_PARAM the call returns with
appropriate values in the rest of fields of pciv_config_vf_t.
The num_vf field indicates the number of VFs that is defined in the
backend store such as MD or the /etc/pci.conf file for this device. The
first_vf_offset, vf_stride, ari_cap, and page_size are the correspond‐
ing values retrieved from the SRIOV capability structure of the PF
device.
After first calling pciv_vf_config() with cmd set to PCIV_VFCFG_PARAM,
the caller can then call the interface again with cmd set to
PCIV_VF_ENABLE to enable its VF devices, without modifying any of the
num_vf, first_vf_offset, vf_stride, ari_cap, or page_size values that
were returned when cmd was set as PCIV_VFCFG_PARAM.
RETURN VALUES
The pciv_vf_config() function returns:
DDI_SUCCESS The request was accepted and this PF's VFs are enabled.
DDI_INVAL The command was other than PCIV_VFCFG_PARAM or
PCIV_VF_ENABLE, the device is not IOV capable, num_vf
was set to 0, and the call was made to enable the VF; or
parameters of PCIV_VF_ENABLE do not correspond to the
values returned by PCIV_VFCFG_PARAM.
DDI_FAILURE Implementation-specific failures occurred.
CONTEXT
The pciv_vf_config() function can be called from kernel non-interrupt
context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Uncommitted │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │Unsafe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOattributes(5), ddi_cb_register(9F), pci_param_get(9F)SunOS 5.10 19 May 2011 pciv_vf_config(9F)
