221 строка
6.3 KiB
C
221 строка
6.3 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1992 - 1997, 2000,2002-2007 Silicon Graphics, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/delay.h>
|
|
#include <asm/sn/sn_sal.h>
|
|
#include "ioerror.h"
|
|
#include <asm/sn/addrs.h>
|
|
#include <asm/sn/shubio.h>
|
|
#include <asm/sn/geo.h>
|
|
#include "xtalk/xwidgetdev.h"
|
|
#include "xtalk/hubdev.h"
|
|
#include <asm/sn/bte.h>
|
|
|
|
void hubiio_crb_error_handler(struct hubdev_info *hubdev_info);
|
|
extern void bte_crb_error_handler(cnodeid_t, int, int, ioerror_t *,
|
|
int);
|
|
static irqreturn_t hub_eint_handler(int irq, void *arg)
|
|
{
|
|
struct hubdev_info *hubdev_info;
|
|
struct ia64_sal_retval ret_stuff;
|
|
nasid_t nasid;
|
|
|
|
ret_stuff.status = 0;
|
|
ret_stuff.v0 = 0;
|
|
hubdev_info = (struct hubdev_info *)arg;
|
|
nasid = hubdev_info->hdi_nasid;
|
|
|
|
if (is_shub1()) {
|
|
SAL_CALL_NOLOCK(ret_stuff, SN_SAL_HUB_ERROR_INTERRUPT,
|
|
(u64) nasid, 0, 0, 0, 0, 0, 0);
|
|
|
|
if ((int)ret_stuff.v0)
|
|
panic("%s: Fatal %s Error", __func__,
|
|
((nasid & 1) ? "TIO" : "HUBII"));
|
|
|
|
if (!(nasid & 1)) /* Not a TIO, handle CRB errors */
|
|
(void)hubiio_crb_error_handler(hubdev_info);
|
|
} else
|
|
if (nasid & 1) { /* TIO errors */
|
|
SAL_CALL_NOLOCK(ret_stuff, SN_SAL_HUB_ERROR_INTERRUPT,
|
|
(u64) nasid, 0, 0, 0, 0, 0, 0);
|
|
|
|
if ((int)ret_stuff.v0)
|
|
panic("%s: Fatal TIO Error", __func__);
|
|
} else
|
|
bte_error_handler(NODEPDA(nasid_to_cnodeid(nasid)));
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* Free the hub CRB "crbnum" which encountered an error.
|
|
* Assumption is, error handling was successfully done,
|
|
* and we now want to return the CRB back to Hub for normal usage.
|
|
*
|
|
* In order to free the CRB, all that's needed is to de-allocate it
|
|
*
|
|
* Assumption:
|
|
* No other processor is mucking around with the hub control register.
|
|
* So, upper layer has to single thread this.
|
|
*/
|
|
void hubiio_crb_free(struct hubdev_info *hubdev_info, int crbnum)
|
|
{
|
|
ii_icrb0_b_u_t icrbb;
|
|
|
|
/*
|
|
* The hardware does NOT clear the mark bit, so it must get cleared
|
|
* here to be sure the error is not processed twice.
|
|
*/
|
|
icrbb.ii_icrb0_b_regval = REMOTE_HUB_L(hubdev_info->hdi_nasid,
|
|
IIO_ICRB_B(crbnum));
|
|
icrbb.b_mark = 0;
|
|
REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICRB_B(crbnum),
|
|
icrbb.ii_icrb0_b_regval);
|
|
/*
|
|
* Deallocate the register wait till hub indicates it's done.
|
|
*/
|
|
REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICDR, (IIO_ICDR_PND | crbnum));
|
|
while (REMOTE_HUB_L(hubdev_info->hdi_nasid, IIO_ICDR) & IIO_ICDR_PND)
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
/*
|
|
* hubiio_crb_error_handler
|
|
*
|
|
* This routine gets invoked when a hub gets an error
|
|
* interrupt. So, the routine is running in interrupt context
|
|
* at error interrupt level.
|
|
* Action:
|
|
* It's responsible for identifying ALL the CRBs that are marked
|
|
* with error, and process them.
|
|
*
|
|
* If you find the CRB that's marked with error, map this to the
|
|
* reason it caused error, and invoke appropriate error handler.
|
|
*
|
|
* XXX Be aware of the information in the context register.
|
|
*
|
|
* NOTE:
|
|
* Use REMOTE_HUB_* macro instead of LOCAL_HUB_* so that the interrupt
|
|
* handler can be run on any node. (not necessarily the node
|
|
* corresponding to the hub that encountered error).
|
|
*/
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : hub_error_init
|
|
* Purpose : initialize the error handling requirements for a given hub.
|
|
* Parameters : cnode, the compact nodeid.
|
|
* Assumptions : Called only once per hub, either by a local cpu. Or by a
|
|
* remote cpu, when this hub is headless.(cpuless)
|
|
* Returns : None
|
|
*/
|
|
void hub_error_init(struct hubdev_info *hubdev_info)
|
|
{
|
|
|
|
if (request_irq(SGI_II_ERROR, hub_eint_handler, IRQF_SHARED,
|
|
"SN_hub_error", hubdev_info)) {
|
|
printk(KERN_ERR "hub_error_init: Failed to request_irq for 0x%p\n",
|
|
hubdev_info);
|
|
return;
|
|
}
|
|
irq_set_handler(SGI_II_ERROR, handle_level_irq);
|
|
sn_set_err_irq_affinity(SGI_II_ERROR);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function : ice_error_init
|
|
* Purpose : initialize the error handling requirements for a given tio.
|
|
* Parameters : cnode, the compact nodeid.
|
|
* Assumptions : Called only once per tio.
|
|
* Returns : None
|
|
*/
|
|
void ice_error_init(struct hubdev_info *hubdev_info)
|
|
{
|
|
|
|
if (request_irq
|
|
(SGI_TIO_ERROR, (void *)hub_eint_handler, IRQF_SHARED, "SN_TIO_error",
|
|
(void *)hubdev_info)) {
|
|
printk("ice_error_init: request_irq() error hubdev_info 0x%p\n",
|
|
hubdev_info);
|
|
return;
|
|
}
|
|
irq_set_handler(SGI_TIO_ERROR, handle_level_irq);
|
|
sn_set_err_irq_affinity(SGI_TIO_ERROR);
|
|
}
|
|
|