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/* $Id$
*
* 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 Silicon Graphics, Inc.
* Copyright (C) 2000 by Alan Mayer
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <asm/smp.h>
#include <asm/sn/sgi.h>
#include <asm/sn/iograph.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
#include <asm/sn/nodemask.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/synergy.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/pci/pciio.h>
#include <asm/sn/pci/pcibr.h>
#include <asm/sn/xtalk/xtalk.h>
#include <asm/sn/pci/pcibr_private.h>
#include <asm/sn/intr.h>
extern void hubni_eint_init(cnodeid_t cnode);
extern void hubii_eint_init(cnodeid_t cnode);
extern void hubii_eint_handler (int irq, void *arg, struct pt_regs *ep);
extern void snia_error_intr_handler(int irq, void *devid, struct pt_regs *pt_regs);
extern int maxcpus;
#define HUB_ERROR_PERIOD (120 * HZ) /* 2 minutes */
void
hub_error_clear(nasid_t nasid)
{
int i;
hubreg_t idsr;
int sn;
for(sn=0; sn<NUM_SUBNODES; sn++) {
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_PEND, -1);
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STATUS0_A_CLR, -1);
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STATUS0_B_CLR, -1);
REMOTE_HUB_PI_S(nasid, sn, PI_SPURIOUS_HDR_0, 0);
REMOTE_HUB_PI_S(nasid, sn, PI_SPURIOUS_HDR_1, 0);
}
REMOTE_HUB_L(nasid, MD_DIR_ERROR_CLR);
REMOTE_HUB_L(nasid, MD_MEM_ERROR_CLR);
REMOTE_HUB_L(nasid, MD_MISC1_ERROR_CLR);
REMOTE_HUB_L(nasid, MD_PROTOCOL_ERR_CLR);
/*
* Make sure spurious write response errors are cleared
* (values are from hub_set_prb())
*/
for (i = 0; i <= HUB_WIDGET_ID_MAX - HUB_WIDGET_ID_MIN + 1; i++) {
iprb_t prb;
prb.iprb_regval = REMOTE_HUB_L(nasid, IIO_IOPRB_0 + (i * sizeof(hubreg_t)));
/* Clear out some fields */
prb.iprb_ovflow = 1;
prb.iprb_bnakctr = 0;
prb.iprb_anakctr = 0;
/*
* PIO reads in fire-and-forget mode on bedrock 1.0 don't
* frob the credit count properly, making the responses appear
* spurious. So don't use fire-and-forget mode. Bug 761802.
*/
prb.iprb_ff = 0; /* disable fire-and-forget mode by default */
prb.iprb_xtalkctr = 3; /* approx. PIO credits for the widget */
REMOTE_HUB_S(nasid, IIO_IOPRB_0 + (i * sizeof(hubreg_t)), prb.iprb_regval);
}
REMOTE_HUB_S(nasid, IIO_IO_ERR_CLR, -1);
idsr = REMOTE_HUB_L(nasid, IIO_IIDSR);
REMOTE_HUB_S(nasid, IIO_IIDSR, (idsr & ~(IIO_IIDSR_SENT_MASK)));
REMOTE_HUB_L(nasid, NI_PORT_ERROR_CLEAR);
/* No need to clear NI_PORT_HEADER regs; they are continually overwritten*/
REMOTE_HUB_S(nasid, LB_ERROR_MASK_CLR, -1);
REMOTE_HUB_S(nasid, LB_ERROR_HDR1, 0);
/* Clear XB error regs, in order */
for (i = 0;
i <= XB_FIRST_ERROR_CLEAR - XB_POQ0_ERROR_CLEAR;
i += sizeof(hubreg_t)) {
REMOTE_HUB_S(nasid, XB_POQ0_ERROR_CLEAR + i, 0);
}
}
/*
* 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(cnodeid_t cnode)
{
nasid_t nasid;
nasid = cnodeid_to_nasid(cnode);
hub_error_clear(nasid);
#ifdef ajm
if (cnode == 0) {
/*
* Allocate log for storing the node specific error info
*/
for (i = 0; i < numnodes; i++) {
kl_error_log[i] = kmem_zalloc_node(sizeof(sn0_error_log_t),
KM_NOSLEEP, i);
hub_err_count[i] = kmem_zalloc_node(sizeof(hub_errcnt_t),
VM_DIRECT | KM_NOSLEEP, i);
ASSERT_ALWAYS(kl_error_log[i] && hub_err_count[i]);
}
}
/*
* Assumption: There will be only one cpu who will initialize
* a hub. we need to setup the ii and each pi error interrupts.
* The SN1 hub (bedrock) has two PI, one for up to two processors.
*/
if (cpuid_to_cnodeid(smp_processor_id()) == cnode) {
int generic_intr_mask = PI_ERR_GENERIC; /* These interrupts are sent to only 1 CPU per NODE */
ASSERT_ALWAYS(kl_error_log[cnode]);
ASSERT_ALWAYS(hub_err_count[cnode]);
MD_ERR_LOG_INIT(kl_error_log[cnode]);
/* One for each CPU */
recover_error_init(RECOVER_ERROR_TABLE(cnode, 0));
recover_error_init(RECOVER_ERROR_TABLE(cnode, 1));
recover_error_init(RECOVER_ERROR_TABLE(cnode, 2));
recover_error_init(RECOVER_ERROR_TABLE(cnode, 3));
/*
* Setup error intr masks.
*/
for(sn=0; sn<NUM_SUBNODES; sn++) {
int cpuA_present = REMOTE_HUB_PI_L(nasid, sn, PI_CPU_ENABLE_A);
int cpuB_present = REMOTE_HUB_PI_L(nasid, sn, PI_CPU_ENABLE_B);
if (cpuA_present) {
if (cpuB_present) { /* A && B */
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_A,
(PI_FATAL_ERR_CPU_B | PI_MISC_ERR_CPU_A|generic_intr_mask));
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_B,
(PI_FATAL_ERR_CPU_A | PI_MISC_ERR_CPU_B));
} else { /* A && !B */
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_A,
(PI_FATAL_ERR_CPU_A | PI_MISC_ERR_CPU_A|generic_intr_mask));
}
generic_intr_mask = 0;
} else {
if (cpuB_present) { /* !A && B */
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_B,
(PI_FATAL_ERR_CPU_B | PI_MISC_ERR_CPU_B|generic_intr_mask));
generic_intr_mask = 0;
} else { /* !A && !B */
/* nothing to set up */
}
}
}
/*
* Turn off UNCAC_UNCORR interrupt in the masks. Anyone interested
* in these errors will peek at the int pend register to see if its
* set.
*/
for(sn=0; sn<NUM_SUBNODES; sn++) {
misc = REMOTE_HUB_PI_L(nasid, sn, PI_ERR_INT_MASK_A);
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_A, (misc & ~PI_ERR_UNCAC_UNCORR_A));
misc = REMOTE_HUB_PI_L(nasid, sn, PI_ERR_INT_MASK_B);
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_B, (misc & ~PI_ERR_UNCAC_UNCORR_B));
}
/*
* enable all error indicators to turn on, in case of errors.
*
* This is not good on single cpu node boards.
**** LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL);
*/
for(sn=0; sn<NUM_SUBNODES; sn++) {
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STATUS1_A_CLR, 0);
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STATUS1_B_CLR, 0);
}
/* Set up stack for each present processor */
for(sn=0; sn<NUM_SUBNODES; sn++) {
if (REMOTE_HUB_PI_L(nasid, sn, PI_CPU_PRESENT_A)) {
SN0_ERROR_LOG(cnode)->el_spool_cur_addr[0] =
SN0_ERROR_LOG(cnode)->el_spool_last_addr[0] =
REMOTE_HUB_PI_L(nasid, sn, PI_ERR_STACK_ADDR_A);
}
if (REMOTE_HUB_PI_L(nasid, sn, PI_CPU_PRESENT_B)) {
SN0_ERROR_LOG(cnode)->el_spool_cur_addr[1] =
SN0_ERROR_LOG(cnode)->el_spool_last_addr[1] =
REMOTE_HUB_PI_L(nasid, sn, PI_ERR_STACK_ADDR_B);
}
}
PI_SPOOL_SIZE_BYTES =
ERR_STACK_SIZE_BYTES(REMOTE_HUB_L(nasid, PI_ERR_STACK_SIZE));
#ifdef BRINGUP
/* BRINGUP: The following code looks like a check to make sure
the prom set up the error spool correctly for 2 processors. I
don't think it is needed. */
for(sn=0; sn<NUM_SUBNODES; sn++) {
if (REMOTE_HUB_PI_L(nasid, sn, PI_CPU_PRESENT_B)) {
__psunsigned_t addr_a = REMOTE_HUB_PI_L(nasid, sn, PI_ERR_STACK_ADDR_A);
__psunsigned_t addr_b = REMOTE_HUB_PI_L(nasid, sn, PI_ERR_STACK_ADDR_B);
if ((addr_a & ~0xff) == (addr_b & ~0xff)) {
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STACK_ADDR_B,
addr_b + PI_SPOOL_SIZE_BYTES);
SN0_ERROR_LOG(cnode)->el_spool_cur_addr[1] =
SN0_ERROR_LOG(cnode)->el_spool_last_addr[1] =
REMOTE_HUB_PI_L(nasid, sn, PI_ERR_STACK_ADDR_B);
}
}
}
#endif /* BRINGUP */
/* programming our own hub. Enable error_int_pend intr.
* If both present, CPU A takes CPU b's error interrupts and any
* generic ones. CPU B takes CPU A error ints.
*/
if (cause_intr_connect (SRB_ERR_IDX,
(intr_func_t)(hubpi_eint_handler),
SR_ALL_MASK|SR_IE)) {
cmn_err(ERR_WARN,
"hub_error_init: cause_intr_connect failed on %d", cnode);
}
}
else {
/* programming remote hub. The only valid reason that this
* is called will be on headless hubs. No interrupts
*/
for(sn=0; sn<NUM_SUBNODES; sn++) {
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_A, 0); /* not necessary */
REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_MASK_B, 0); /* not necessary */
}
}
#endif /* ajm */
/*
* Now setup the hub ii and ni error interrupt handler.
*/
hubii_eint_init(cnode);
hubni_eint_init(cnode);
#ifdef ajm
/*** XXX FIXME XXX resolve the following***/
/* INT_PEND1 bits set up for one hub only:
* SHUTDOWN_INTR
* MD_COR_ERR_INTR
* COR_ERR_INTR_A and COR_ERR_INTR_B should be sent to the
* appropriate CPU only.
*/
if (cnode == 0) {
error_consistency_check.eps_state = 0;
error_consistency_check.eps_cpuid = -1;
spinlock_init(&error_consistency_check.eps_lock, "error_dump_lock");
}
#endif
nodepda->huberror_ticks = HUB_ERROR_PERIOD;
return;
}
/*
* Function : hubii_eint_init
* Parameters : cnode
* Purpose : to initialize the hub iio error interrupt.
* Assumptions : Called once per hub, by the cpu which will ultimately
* handle this interrupt.
* Returns : None.
*/
void
hubii_eint_init(cnodeid_t cnode)
{
int bit, rv;
ii_iidsr_u_t hubio_eint;
hubinfo_t hinfo;
cpuid_t intr_cpu;
devfs_handle_t hub_v;
ii_ilcsr_u_t ilcsr;
hub_v = (devfs_handle_t)cnodeid_to_vertex(cnode);
ASSERT_ALWAYS(hub_v);
hubinfo_get(hub_v, &hinfo);
ASSERT(hinfo);
ASSERT(hinfo->h_cnodeid == cnode);
ilcsr.ii_ilcsr_regval = REMOTE_HUB_L(hinfo->h_nasid, IIO_ILCSR);
if ((ilcsr.ii_ilcsr_fld_s.i_llp_stat & 0x2) == 0) {
/*
* HUB II link is not up.
* Just disable LLP, and don't connect any interrupts.
*/
ilcsr.ii_ilcsr_fld_s.i_llp_en = 0;
REMOTE_HUB_S(hinfo->h_nasid, IIO_ILCSR, ilcsr.ii_ilcsr_regval);
return;
}
/* Select a possible interrupt target where there is a free interrupt
* bit and also reserve the interrupt bit for this IO error interrupt
*/
intr_cpu = intr_heuristic(hub_v,0,INTRCONNECT_ANYBIT,II_ERRORINT,hub_v,
"HUB IO error interrupt",&bit);
if (intr_cpu == CPU_NONE) {
printk("hubii_eint_init: intr_reserve_level failed, cnode %d", cnode);
return;
}
rv = intr_connect_level(intr_cpu, bit, 0,(intr_func_t)(NULL),
(void *)(long)hub_v, NULL);
synergy_intr_connect(bit, intr_cpu);
request_irq(bit_pos_to_irq(bit) + (intr_cpu << 8), hubii_eint_handler, 0, NULL, (void *)hub_v);
ASSERT_ALWAYS(rv >= 0);
hubio_eint.ii_iidsr_regval = 0;
hubio_eint.ii_iidsr_fld_s.i_enable = 1;
hubio_eint.ii_iidsr_fld_s.i_level = bit;/* Take the least significant bits*/
hubio_eint.ii_iidsr_fld_s.i_node = COMPACT_TO_NASID_NODEID(cnode);
hubio_eint.ii_iidsr_fld_s.i_pi_id = cpuid_to_subnode(intr_cpu);
REMOTE_HUB_S(hinfo->h_nasid, IIO_IIDSR, hubio_eint.ii_iidsr_regval);
}
void
hubni_eint_init(cnodeid_t cnode)
{
int intr_bit;
cpuid_t targ;
if ((targ = cnodeid_to_cpuid(cnode)) == CPU_NONE)
return;
/* The prom chooses which cpu gets these interrupts, but we
* don't know which one it chose. We will register all of the
* cpus to be sure. This only costs us an irqaction per cpu.
*/
for (; targ < CPUS_PER_NODE; targ++) {
if (!cpu_enabled(targ) ) continue;
/* connect the INTEND1 bits. */
for (intr_bit = XB_ERROR; intr_bit <= MSC_PANIC_INTR; intr_bit++) {
intr_connect_level(targ, intr_bit, II_ERRORINT, NULL, NULL, NULL);
}
request_irq(SGI_HUB_ERROR_IRQ + (targ << 8), snia_error_intr_handler, 0, NULL, NULL);
/* synergy masks are initialized in the prom to enable all interrupts. */
/* We'll just leave them that way, here, for these interrupts. */
}
}
/*ARGSUSED*/
void
hubii_eint_handler (int irq, void *arg, struct pt_regs *ep)
{
devfs_handle_t hub_v;
hubinfo_t hinfo;
ii_wstat_u_t wstat;
hubreg_t idsr;
panic("Hubii interrupt\n");
#ifdef ajm
/*
* If the NI has a problem, everyone has a problem. We shouldn't
* even attempt to handle other errors when an NI error is present.
*/
if (check_ni_errors()) {
hubni_error_handler("II interrupt", 1);
/* NOTREACHED */
}
/* two levels of casting avoids compiler warning.!! */
hub_v = (devfs_handle_t)(long)(arg);
ASSERT(hub_v);
hubinfo_get(hub_v, &hinfo);
/*
* Identify the reason for error.
*/
wstat.ii_wstat_regval = REMOTE_HUB_L(hinfo->h_nasid, IIO_WSTAT);
if (wstat.ii_wstat_fld_s.w_crazy) {
char *reason;
/*
* We can do a couple of things here.
* Look at the fields TX_MX_RTY/XT_TAIL_TO/XT_CRD_TO to check
* which of these caused the CRAZY bit to be set.
* You may be able to check if the Link is up really.
*/
if (wstat.ii_wstat_fld_s.w_tx_mx_rty)
reason = "Micro Packet Retry Timeout";
else if (wstat.ii_wstat_fld_s.w_xt_tail_to)
reason = "Crosstalk Tail Timeout";
else if (wstat.ii_wstat_fld_s.w_xt_crd_to)
reason = "Crosstalk Credit Timeout";
else {
hubreg_t hubii_imem;
/*
* Check if widget 0 has been marked as shutdown, or
* if BTE 0/1 has been marked.
*/
hubii_imem = REMOTE_HUB_L(hinfo->h_nasid, IIO_IMEM);
if (hubii_imem & IIO_IMEM_W0ESD)
reason = "Hub Widget 0 has been Shutdown";
else if (hubii_imem & IIO_IMEM_B0ESD)
reason = "BTE 0 has been shutdown";
else if (hubii_imem & IIO_IMEM_B1ESD)
reason = "BTE 1 has been shutdown";
else reason = "Unknown";
}
/*
* Note: we may never be able to print this, if the II talking
* to Xbow which hosts the console is dead.
*/
printk("Hub %d to Xtalk Link failed (II_ECRAZY) Reason: %s",
hinfo->h_cnodeid, reason);
}
/*
* It's a toss as to which one among PRB/CRB to check first.
* Current decision is based on the severity of the errors.
* IO CRB errors tend to be more severe than PRB errors.
*
* It is possible for BTE errors to have been handled already, so we
* may not see any errors handled here.
*/
(void)hubiio_crb_error_handler(hub_v, hinfo);
(void)hubiio_prb_error_handler(hub_v, hinfo);
/*
* If we reach here, it indicates crb/prb handlers successfully
* handled the error. So, re-enable II to send more interrupt
* and return.
*/
REMOTE_HUB_S(hinfo->h_nasid, IIO_IECLR, 0xffffff);
idsr = REMOTE_HUB_L(hinfo->h_nasid, IIO_IIDSR) & ~IIO_IIDSR_SENT_MASK;
REMOTE_HUB_S(hinfo->h_nasid, IIO_IIDSR, idsr);
#endif /* ajm */
}
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