Tribblix: manual page: pci_ereport

PCI_EREPORT_SETUP(9F) Kernel Functions for Drivers PCI_EREPORT_SETUP(9F)

NAME

pci_ereport_setup, pci_ereport_teardown, pci_ereport_post - post
error reports for the generic PCI errors logged in the PCI
Configuration Status register.

SYNOPSIS

#include <sys/sunddi.h>

void pci_ereport_setup(dev_info_t *dip);

void pci_ereport_teardown(dev_info_t *dip);

void pci_ereport_post(dev_info_t *dip, ddi_fm_error_t *dep,
uin16_t *status);

INTERFACE LEVEL

illumos DDI specific (illumos DDI)

PARAMETERS

dip
Pointer to the dev_info structure of the devices

dep
Pointer to DDI error status

status
Pointer to status bit storage location

DESCRIPTION

The pci_ereport_setup() function initializes support for error report
generation and sets up the resources for subsequent access to PCI,
PCI/X or PCI Express Configuration space. The caller must have
established a fault management capability level of at least
DDI_FM_EREPORT_CAPABLE with a previous call to ddi_fm_init() for dip.

The pci_ereport_teardown() function releases any resources allocated
and set up by pci_ereport_setup() and associated with dip.

The pci_ereport_post() function is called to scan for and post any
PCI, PCI/X or PCI Express Bus errors. On a PCI bus, for example, the
errors detected include:

o Detected Parity Error

o Master Data Parity Error

o Target Abort

o Master Abort

o System Error

o Discard Timeout

The pci_ereport_post() function must be called only from a driver's
error handler callback function. See ddi_fm_handler_register(9F). The
error_status argument to the error handler callback function should
be passed through as the dep argument to pci_ereport_post() as it may
contain bus specific information that might be useful for handling
any errors that are discovered.

The fme_flag in the error_status argument to the error handler
callback function will contain one of the following:

DDI_FM_ERR_UNEXPECTED()
Any errors discovered are unexpected.

DDI_FM_ERR_EXPECTED()
Errors discovered were the result of a
DDI_ACC_CAUTIOUS operation.

DDI_FM_ERR_POKE()
Errors discovered are the result of a
ddi_poke(9F) operation.

DDI_FM_ERR_PEEK()
Errors discovered are the result of a
ddi_peek(9F) operation.

Error report events are generated automatically if fme_flag is set to
DDI_FM_ERR_UNEXPECTED and the corresponding error bits are set in the
various PCI, PCI/X or PCI Express Bus error registers of the device
associated with dip. The generated error report events are posted to
the illumos Fault Manager, fmd(8), for diagnosis.

If the status argument is non-null, pci_ereport_post() saves the
contents of the PCI Configuration Status Register to *status. If it
is not possible to read the PCI Configuration Status Register, -1 is
returned in *status instead.

On return from the call to pci_ereport_post(), the ddi_fm_error_t
structure pointed at by dep will have been updated, and the
fme_status field contains one of the following values:

DDI_FM_OK
No errors were detected which might affect this
device instance.

DDI_FM_FATAL
An error which is considered fatal to the
operational state of the system was detected.

DDI_FM_NONFATAL
An error which is not considered fatal to the
operational state of the system was detected. The
fme_acc_handle or fme_dma_handle fields in the
returned ddi_fm_error_t structure will typically
reference a handle that belongs to the device
instance that has been affected.

DDI_FM_UNKNOWN
An error was detected, but the call was unable to
determine the impact of the error on the
operational state of the system. This is treated
the same way as DDI_FM_FATAL unless some other
device is able to evaluate the fault to be
DDI_FM_NONFATAL.

CONTEXT

The pci_ereport_setup() and pci_ereport_teardown() functions must be
called from user or kernel context.

The pci_ereport_post() function can be called in any context.

EXAMPLES

int xxx_fmcap = DDI_FM_EREPORT_CAPABLE | DDI_FM_ERRCB_CAPABLE;

xxx_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) {

ddi_fm_init(dip, &xxx_fmcap, &xxx_ibc);
if (xxx_fmcap & DDI_FM_ERRCB_CAPABLE)
ddi_fm_handler_register(dip, xxx_err_cb);
if (xxx_fmcap & DDI_FM_EREPORT_CAPABLE)
pci_ereport_setup(dip);

}

xxx_err_cb(dev_info_t *dip, ddi_fm_error_t *errp) {
uint16_t status;

pci_ereport_post(dip, errp, &status);
return (errp->fme_status);
}

xxx_detach(dev_info_t *dip, ddi_attach_cmd_t cmd) {

if (xxx_fmcap & DDI_FM_EREPORT_CAPABLE)
pci_ereport_teardown(dip);
if (xxx_fmcap & DDI_FM_ERRCB_CAPABLE)
ddi_fm_handler_unregister(dip);
ddi_fm_fini(dip);

}

ATTRIBUTES