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/* $Id: hubcounters.c,v 1.1 2002/02/28 17:31:25 marcelo Exp $
*
* 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 Silicon Graphics, Inc.
* All rights reserved.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <asm/types.h>
#include <asm/sn/io.h>
#include <asm/sn/nodepda.h>
#include <asm/sn/iograph.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/router.h>
#include <asm/sn/snconfig.h>
#include <asm/sn/slotnum.h>
#include <asm/sn/clksupport.h>
#include <asm/sn/sndrv.h>
extern void hubni_error_handler(char *, int); /* huberror.c */
static int hubstats_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
struct file_operations hub_mon_fops = {
ioctl: hubstats_ioctl,
};
#define HUB_CAPTURE_TICKS (2 * HZ)
#define HUB_ERR_THRESH 500
#define USEC_PER_SEC 1000000
#define NSEC_PER_SEC USEC_PER_SEC*1000
volatile int hub_print_usecs = 600 * USEC_PER_SEC;
/* Return success if the hub's crosstalk link is working */
int
hub_xtalk_link_up(nasid_t nasid)
{
hubreg_t llp_csr_reg;
/* Read the IO LLP control status register */
llp_csr_reg = REMOTE_HUB_L(nasid, IIO_LLP_CSR);
/* Check if the xtalk link is working */
if (llp_csr_reg & IIO_LLP_CSR_IS_UP)
return(1);
return(0);
}
static char *error_flag_to_type(unsigned char error_flag)
{
switch(error_flag) {
case 0x1: return ("NI retries");
case 0x2: return ("NI SN errors");
case 0x4: return ("NI CB errors");
case 0x8: return ("II CB errors");
case 0x10: return ("II SN errors");
default: return ("Errors");
}
}
int
print_hub_error(hubstat_t *hsp, hubreg_t reg,
int64_t delta, unsigned char error_flag)
{
int64_t rate;
reg *= hsp->hs_per_minute; /* Convert to minutes */
rate = reg / delta;
if (rate > HUB_ERR_THRESH) {
if(hsp->hs_maint & error_flag)
{
printk( "Excessive %s (%ld/min) on %s",
error_flag_to_type(error_flag), rate, hsp->hs_name);
}
else
{
hsp->hs_maint |= error_flag;
printk( "Excessive %s (%ld/min) on %s",
error_flag_to_type(error_flag), rate, hsp->hs_name);
}
return 1;
} else {
return 0;
}
}
int
check_hub_error_rates(hubstat_t *hsp)
{
int64_t delta = hsp->hs_timestamp - hsp->hs_timebase;
int printed = 0;
printed += print_hub_error(hsp, hsp->hs_ni_retry_errors,
delta, 0x1);
#if 0
printed += print_hub_error(hsp, hsp->hs_ni_sn_errors,
delta, 0x2);
#endif
printed += print_hub_error(hsp, hsp->hs_ni_cb_errors,
delta, 0x4);
/* If the hub's xtalk link is not working there is
* no need to print the "Excessive..." warning
* messages
*/
if (!hub_xtalk_link_up(hsp->hs_nasid))
return(printed);
printed += print_hub_error(hsp, hsp->hs_ii_cb_errors,
delta, 0x8);
printed += print_hub_error(hsp, hsp->hs_ii_sn_errors,
delta, 0x10);
return printed;
}
void
capture_hub_stats(cnodeid_t cnodeid, struct nodepda_s *npda)
{
nasid_t nasid;
hubstat_t *hsp = &(npda->hubstats);
hubreg_t port_error;
ii_illr_u_t illr;
int count;
int overflow = 0;
/*
* If our link wasn't up at boot time, don't worry about error rates.
*/
if (!(hsp->hs_ni_port_status & NPS_LINKUP_MASK)) {
printk("capture_hub_stats: cnode=%d hs_ni_port_status=0x%016lx : link is not up\n",
cnodeid, hsp->hs_ni_port_status);
return;
}
nasid = COMPACT_TO_NASID_NODEID(cnodeid);
hsp->hs_timestamp = GET_RTC_COUNTER();
port_error = REMOTE_HUB_L(nasid, NI_PORT_ERROR_CLEAR);
count = ((port_error & NPE_RETRYCOUNT_MASK) >> NPE_RETRYCOUNT_SHFT);
hsp->hs_ni_retry_errors += count;
if (count == NPE_COUNT_MAX)
overflow = 1;
count = ((port_error & NPE_SNERRCOUNT_MASK) >> NPE_SNERRCOUNT_SHFT);
hsp->hs_ni_sn_errors += count;
if (count == NPE_COUNT_MAX)
overflow = 1;
count = ((port_error & NPE_CBERRCOUNT_MASK) >> NPE_CBERRCOUNT_SHFT);
hsp->hs_ni_cb_errors += count;
if (overflow || count == NPE_COUNT_MAX)
hsp->hs_ni_overflows++;
if (port_error & NPE_FATAL_ERRORS) {
#ifdef ajm
hubni_error_handler("capture_hub_stats", 1);
#else
printk("Error: hubni_error_handler in capture_hub_stats");
#endif
}
illr.ii_illr_regval = REMOTE_HUB_L(nasid, IIO_LLP_LOG);
REMOTE_HUB_S(nasid, IIO_LLP_LOG, 0);
hsp->hs_ii_sn_errors += illr.ii_illr_fld_s.i_sn_cnt;
hsp->hs_ii_cb_errors += illr.ii_illr_fld_s.i_cb_cnt;
if ((illr.ii_illr_fld_s.i_sn_cnt == IIO_LLP_SN_MAX) ||
(illr.ii_illr_fld_s.i_cb_cnt == IIO_LLP_CB_MAX))
hsp->hs_ii_overflows++;
if (hsp->hs_print) {
if (check_hub_error_rates(hsp)) {
hsp->hs_last_print = GET_RTC_COUNTER();
hsp->hs_print = 0;
}
} else {
if ((GET_RTC_COUNTER() -
hsp->hs_last_print) > hub_print_usecs)
hsp->hs_print = 1;
}
npda->hubticks = HUB_CAPTURE_TICKS;
}
void
init_hub_stats(cnodeid_t cnodeid, struct nodepda_s *npda)
{
hubstat_t *hsp = &(npda->hubstats);
nasid_t nasid = cnodeid_to_nasid(cnodeid);
bzero(&(npda->hubstats), sizeof(hubstat_t));
hsp->hs_version = HUBSTAT_VERSION;
hsp->hs_cnode = cnodeid;
hsp->hs_nasid = nasid;
hsp->hs_timebase = GET_RTC_COUNTER();
hsp->hs_ni_port_status = REMOTE_HUB_L(nasid, NI_PORT_STATUS);
/* Clear the II error counts. */
REMOTE_HUB_S(nasid, IIO_LLP_LOG, 0);
/* Clear the NI counts. */
REMOTE_HUB_L(nasid, NI_PORT_ERROR_CLEAR);
hsp->hs_per_minute = (long long)RTC_CYCLES_PER_SEC * 60LL;
npda->hubticks = HUB_CAPTURE_TICKS;
/* XX should use kmem_alloc_node */
hsp->hs_name = (char *)kmalloc(MAX_HUB_PATH, GFP_KERNEL);
ASSERT_ALWAYS(hsp->hs_name);
sprintf(hsp->hs_name, "/dev/hw/" EDGE_LBL_MODULE "/%03d/"
EDGE_LBL_NODE "/" EDGE_LBL_HUB,
npda->module_id);
hsp->hs_last_print = 0;
hsp->hs_print = 1;
hub_print_usecs = hub_print_usecs;
#if 0
printk("init_hub_stats: cnode=%d nasid=%d hs_version=%d hs_ni_port_status=0x%016lx\n",
cnodeid, nasid, hsp->hs_version, hsp->hs_ni_port_status);
#endif
}
static int
hubstats_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
cnodeid_t cnode;
nodepda_t *npdap;
uint64_t longarg;
devfs_handle_t d;
if ((d = devfs_get_handle_from_inode(inode)) == NULL)
return -ENODEV;
cnode = (cnodeid_t)hwgraph_fastinfo_get(d);
npdap = NODEPDA(cnode);
if (npdap->hubstats.hs_version != HUBSTAT_VERSION) {
init_hub_stats(cnode, npdap);
}
switch (cmd) {
case SNDRV_GET_INFOSIZE:
longarg = sizeof(hubstat_t);
if (copy_to_user((void *)arg, &longarg, sizeof(longarg))) {
return -EFAULT;
}
break;
case SNDRV_GET_HUBINFO:
/* refresh npda->hubstats */
capture_hub_stats(cnode, npdap);
if (copy_to_user((void *)arg, &npdap->hubstats, sizeof(hubstat_t))) {
return -EFAULT;
}
break;
default:
return -EINVAL;
}
return 0;
}
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