void hubiio_crb_error_handler(struct hubdev_info *hubdev_info)
{
nasid_t nasid;
ii_icrb0_a_u_t icrba; /* II CRB Register A */
ii_icrb0_b_u_t icrbb; /* II CRB Register B */
ii_icrb0_c_u_t icrbc; /* II CRB Register C */
ii_icrb0_d_u_t icrbd; /* II CRB Register D */
ii_icrb0_e_u_t icrbe; /* II CRB Register D */
int i;
int num_errors = 0; /* Num of errors handled */
ioerror_t ioerror;
nasid = hubdev_info->hdi_nasid;
/*
* XXX - Add locking for any recovery actions
*/
/*
* Scan through all CRBs in the Hub, and handle the errors
* in any of the CRBs marked.
*/
for (i = 0; i < IIO_NUM_CRBS; i++) {
/* Check this crb entry to see if it is in error. */
icrbb.ii_icrb0_b_regval = REMOTE_HUB_L(nasid, IIO_ICRB_B(i));
if (icrbb.b_mark == 0) {
continue;
}
icrba.ii_icrb0_a_regval = REMOTE_HUB_L(nasid, IIO_ICRB_A(i));
IOERROR_INIT(&ioerror);
/* read other CRB error registers. */
icrbc.ii_icrb0_c_regval = REMOTE_HUB_L(nasid, IIO_ICRB_C(i));
icrbd.ii_icrb0_d_regval = REMOTE_HUB_L(nasid, IIO_ICRB_D(i));
icrbe.ii_icrb0_e_regval = REMOTE_HUB_L(nasid, IIO_ICRB_E(i));
IOERROR_SETVALUE(&ioerror, errortype, icrbb.b_ecode);
/* Check if this error is due to BTE operation,
* and handle it separately.
*/
if (icrbd.d_bteop ||
((icrbb.b_initiator == IIO_ICRB_INIT_BTE0 ||
icrbb.b_initiator == IIO_ICRB_INIT_BTE1) &&
(icrbb.b_imsgtype == IIO_ICRB_IMSGT_BTE ||
icrbb.b_imsgtype == IIO_ICRB_IMSGT_SN1NET))) {
int bte_num;
if (icrbd.d_bteop)
bte_num = icrbc.c_btenum;
else /* b_initiator bit 2 gives BTE number */
bte_num = (icrbb.b_initiator & 0x4) >> 2;
hubiio_crb_free(hubdev_info, i);
bte_crb_error_handler(nasid_to_cnodeid(nasid), bte_num,
i, &ioerror, icrbd.d_bteop);
num_errors++;
continue;
}
}
int
hubiio_crb_error_handler(vertex_hdl_t hub_v, hubinfo_t hinfo)
{
cnodeid_t cnode;
nasid_t nasid;
ii_icrb0_a_u_t icrba; /* II CRB Register A */
ii_icrb0_b_u_t icrbb; /* II CRB Register B */
ii_icrb0_c_u_t icrbc; /* II CRB Register C */
ii_icrb0_d_u_t icrbd; /* II CRB Register D */
ii_icrb0_e_u_t icrbe; /* II CRB Register D */
int i;
int num_errors = 0; /* Num of errors handled */
ioerror_t ioerror;
int rc;
nasid = hinfo->h_nasid;
cnode = NASID_TO_COMPACT_NODEID(nasid);
/*
* XXX - Add locking for any recovery actions
*/
/*
* Scan through all CRBs in the Hub, and handle the errors
* in any of the CRBs marked.
*/
for (i = 0; i < IIO_NUM_CRBS; i++) {
/* Check this crb entry to see if it is in error. */
icrbb.ii_icrb0_b_regval = REMOTE_HUB_L(nasid, IIO_ICRB_B(i));
if (icrbb.b_mark == 0) {
continue;
}
icrba.ii_icrb0_a_regval = REMOTE_HUB_L(nasid, IIO_ICRB_A(i));
IOERROR_INIT(&ioerror);
/* read other CRB error registers. */
icrbc.ii_icrb0_c_regval = REMOTE_HUB_L(nasid, IIO_ICRB_C(i));
icrbd.ii_icrb0_d_regval = REMOTE_HUB_L(nasid, IIO_ICRB_D(i));
icrbe.ii_icrb0_e_regval = REMOTE_HUB_L(nasid, IIO_ICRB_E(i));
IOERROR_SETVALUE(&ioerror,errortype,icrbb.b_ecode);
/* Check if this error is due to BTE operation,
* and handle it separately.
*/
if (icrbd.d_bteop ||
((icrbb.b_initiator == IIO_ICRB_INIT_BTE0 ||
icrbb.b_initiator == IIO_ICRB_INIT_BTE1) &&
(icrbb.b_imsgtype == IIO_ICRB_IMSGT_BTE ||
icrbb.b_imsgtype == IIO_ICRB_IMSGT_SN1NET))){
int bte_num;
if (icrbd.d_bteop)
bte_num = icrbc.c_btenum;
else /* b_initiator bit 2 gives BTE number */
bte_num = (icrbb.b_initiator & 0x4) >> 2;
hubiio_crb_free(hinfo, i);
bte_crb_error_handler(hub_v, bte_num,
i, &ioerror,
icrbd.d_bteop);
num_errors++;
continue;
}
/*
* XXX
* Assuming the only other error that would reach here is
* crosstalk errors.
* If CRB times out on a message from Xtalk, it changes
* the message type to CRB.
*
* If we get here due to other errors (SN0net/CRB)
* what's the action ?
*/
/*
* Pick out the useful fields in CRB, and
* tuck them away into ioerror structure.
*/
IOERROR_SETVALUE(&ioerror,xtalkaddr,icrba.a_addr << IIO_ICRB_ADDR_SHFT);
IOERROR_SETVALUE(&ioerror,widgetnum,icrba.a_sidn);
if (icrba.a_iow){
/*
* XXX We shouldn't really have BRIDGE-specific code
* here, but alas....
*
* The BRIDGE (or XBRIDGE) sets the upper bit of TNUM
* to indicate a WRITE operation. It sets the next
* bit to indicate an INTERRUPT operation. The bottom
* 3 bits of TNUM indicate which device was responsible.
*/
IOERROR_SETVALUE(&ioerror,widgetdev,
TNUM_TO_WIDGET_DEV(icrba.a_tnum));
/*
* The encoding of TNUM (see comments above) is
* different for PIC. So we'll save TNUM here and
* deal with the differences later when we can
* determine if we're using a Bridge or the PIC.
*
* XXX: We may be able to remove saving the widgetdev
* above and just sort it out of TNUM later.
*/
IOERROR_SETVALUE(&ioerror, tnum, icrba.a_tnum);
}
if (icrbb.b_error) {
/*
* CRB 'i' has some error. Identify the type of error,
* and try to handle it.
*
*/
switch(icrbb.b_ecode) {
case IIO_ICRB_ECODE_PERR:
case IIO_ICRB_ECODE_WERR:
case IIO_ICRB_ECODE_AERR:
case IIO_ICRB_ECODE_PWERR:
case IIO_ICRB_ECODE_TOUT:
case IIO_ICRB_ECODE_XTERR:
printk("Shub II CRB %d: error %s on hub cnodeid: %d",
i, hubiio_crb_errors[icrbb.b_ecode], cnode);
/*
* Any sort of write error is mostly due
* bad programming (Note it's not a timeout.)
* So, invoke hub_iio_error_handler with
* appropriate information.
*/
IOERROR_SETVALUE(&ioerror,errortype,icrbb.b_ecode);
/* Go through the error bit lookup phase */
if (error_state_set(hub_v, ERROR_STATE_LOOKUP) ==
ERROR_RETURN_CODE_CANNOT_SET_STATE)
return(IOERROR_UNHANDLED);
rc = hub_ioerror_handler(
hub_v,
DMA_WRITE_ERROR,
MODE_DEVERROR,
&ioerror);
if (rc == IOERROR_HANDLED) {
rc = hub_ioerror_handler(
hub_v,
DMA_WRITE_ERROR,
MODE_DEVREENABLE,
&ioerror);
}else {
printk("Unable to handle %s on hub %d",
hubiio_crb_errors[icrbb.b_ecode],
cnode);
/* panic; */
}
/* Go to Next error */
print_crb_fields(i, icrba, icrbb, icrbc,
icrbd, icrbe);
hubiio_crb_free(hinfo, i);
continue;
case IIO_ICRB_ECODE_PRERR:
case IIO_ICRB_ECODE_DERR:
printk("Shub II CRB %d: error %s on hub : %d",
i, hubiio_crb_errors[icrbb.b_ecode], cnode);
/* panic */
default:
printk("Shub II CRB error (code : %d) on hub : %d",
icrbb.b_ecode, cnode);
/* panic */
}
}
/*
* Error is not indicated via the errcode field
* Check other error indications in this register.
*/
if (icrbb.b_xerr) {
printk("Shub II CRB %d: Xtalk Packet with error bit set to hub %d",
i, cnode);
/* panic */
}
if (icrbb.b_lnetuce) {
printk("Shub II CRB %d: Uncorrectable data error detected on data "
" from NUMAlink to node %d",
i, cnode);
/* panic */
}
print_crb_fields(i, icrba, icrbb, icrbc, icrbd, icrbe);
if (icrbb.b_error) {
/*
* CRB 'i' has some error. Identify the type of error,
* and try to handle it.
*/
switch(icrbb.b_ecode) {
case IIO_ICRB_ECODE_PERR:
case IIO_ICRB_ECODE_WERR:
case IIO_ICRB_ECODE_AERR:
case IIO_ICRB_ECODE_PWERR:
printk("%s on hub cnodeid: %d",
hubiio_crb_errors[icrbb.b_ecode], cnode);
/*
* Any sort of write error is mostly due
* bad programming (Note it's not a timeout.)
* So, invoke hub_iio_error_handler with
* appropriate information.
*/
IOERROR_SETVALUE(&ioerror,errortype,icrbb.b_ecode);
rc = hub_ioerror_handler(
hub_v,
DMA_WRITE_ERROR,
MODE_DEVERROR,
&ioerror);
if (rc == IOERROR_HANDLED) {
rc = hub_ioerror_handler(
hub_v,
DMA_WRITE_ERROR,
MODE_DEVREENABLE,
&ioerror);
ASSERT(rc == IOERROR_HANDLED);
}else {
panic("Unable to handle %s on hub %d",
hubiio_crb_errors[icrbb.b_ecode],
cnode);
/*NOTREACHED*/
}
/* Go to Next error */
hubiio_crb_free(hinfo, i);
continue;
case IIO_ICRB_ECODE_PRERR:
case IIO_ICRB_ECODE_TOUT:
case IIO_ICRB_ECODE_XTERR:
case IIO_ICRB_ECODE_DERR:
panic("Fatal %s on hub : %d",
hubiio_crb_errors[icrbb.b_ecode], cnode);
/*NOTREACHED*/
default:
panic("Fatal error (code : %d) on hub : %d",
icrbb.b_ecode, cnode);
/*NOTREACHED*/
}
} /* if (icrbb.b_error) */
/*
* Error is not indicated via the errcode field
* Check other error indications in this register.
*/
if (icrbb.b_xerr) {
panic("Xtalk Packet with error bit set to hub %d",
cnode);
/*NOTREACHED*/
}
if (icrbb.b_lnetuce) {
panic("Uncorrectable data error detected on data "
" from Craylink to node %d",
cnode);
/*NOTREACHED*/
}
}