svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
ddi_fm_handler_register(9f)
Kernel Functions ddi_fm_handler_register(9F)
NAME
ddi_fm_handler_register, ddi_fm_handler_unregister - register or unreg‐
ister an error handling callback
SYNOPSIS
#include <sys/ddifm.h>
void ddi_fm_handler_register(dev_info_t *dip,
ddi_err_func_t error_handler, void *impl_data);
void ddi_fm_handler_unregister(dev_info_t *dip);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI)
PARAMETERS
dip Pointer to the dev_info structure
error_handler Pointer to an error handler callback function
impl_data Pointer to private data for use by the caller
DESCRIPTION
The ddi_fm_handler_register() function registers an error handler call‐
back routine with the I/O Fault Management framework. The error handler
callback, error_handler, is called to process error conditions detected
by the system. In addition to its device instance, dip, the error han‐
dler is called with a pointer to a fault management error status struc‐
ture, ddi_fm_error_t. For example:
int (*ddi_err_func_t)(dev_info_t *dip, ddi_fm_error_t *error_status);
A driver error handling callback is passed the following arguments:
o a pointer to the device instance registered for this call‐
back.
o a data structure containing common fault management data and
status for error handling.
The primary responsibilities of the error handler include:
o to check for outstanding hardware or software errors.
o where possible, to isolate the device that might have caused
the errors.
o to report errors that were detected.
During the invocation of an error handler, a device driver might need
to quiesce or suspend all I/O activities in order to check for error
conditions or status in:
o hardware control and status registers.
o outstanding I/O transactions.
o access or DMA handles.
For each error detected, the driver must formulate and post an error
report via ddi_fm_ereport_post() for problem analysis by the Solaris
Fault Manager fmd(8).
For a PCI, PCI/X, or PCI Express leaf device, the pci_ereport_post()
function is provided to carry out reporting responsibilities on behalf
of the driver. In many cases, an error handler callback function of the
following form can be used:
xxx_err_cb(dev_info_t *dip, ddi_fm_error_t *errp) {
pci_ereport_post(dip, errp, NULL);
return (errp->fme_status);
}
In addition, the driver might be able to carry out further device spe‐
cific checks within the error handler.
Error handlers can be called from kernel, interrupt, or high-level
interrupt context. The interrupt block cookie returned from
ddi_fm_init() should be used to allocate and initialize any synchro‐
nization variables and locks that might be used within the error han‐
dler callback function. Such locks may not be held by the driver when a
device register is accessed with functions such as ddi_get8(9F) and
ddi_put8(9F).
The data structure, ddi_fm_error_t, contains an FMA protocol (format 1)
ENA for the current error propagation chain, the status of the error
handler callback, an error expectation flag, and any potential access
or DMA handles associated with an error detected by the parent nexus.
The ddi_fm_handler_unregister() function removes a previously regis‐
tered error handling callback for the device instance specified by the
dip.
CONTEXT
The ddi_fm_handler_register() and ddi_fm_handler_unregister() functions
must be called from kernel context in an attach(9E) or detach(9E) entry
point. The registered error handler, error_handler, callback can be
called from kernel, interrupt, or high level interrupt context.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted
SEE ALSO
attributes(7), fmd(8), attach(9E), detach(9E), ddi_fm_ereport_post(9F),
ddi_fm_init(9F), ddi_get8(9F), ddi_put8(9F), pci_ereport_post(9F),
ddi_fm_error(9S)
Writing Device Drivers in Oracle Solaris 11.4
Oracle Solaris 11.4 14 May 2007
ddi_fm_handler_register(9F)