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Fix kernel dump on ahci controller, by making sure we won't sleep 

while dumping:
- introduce ata_delay() which either use delay() or kpause()
  depending on flags. use it in sata_reset_interface() and
  some ahci functions
- kill ATA_NOSLEEP, it was tested but never set. use ATA_POLL instead.
- reduce delay while polling in ahci, to speed up the dump

Should fix PR kern/41095
This commit is contained in:
bouyer 2013-04-03 17:15:07 +00:00
parent bc869512f9
commit d672ee0cfa
9 changed files with 55 additions and 42 deletions
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18
sys/dev/ata/ata.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ata.c,v 1.126 2012/11/01 13:46:52 abs Exp $ */
/* $NetBSD: ata.c,v 1.127 2013/04/03 17:15:07 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 Manuel Bouyer. All rights reserved.
@ -25,7 +25,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata.c,v 1.126 2012/11/01 13:46:52 abs Exp $");
__KERNEL_RCSID(0, "$NetBSD: ata.c,v 1.127 2013/04/03 17:15:07 bouyer Exp $");
#include "opt_ata.h"
@ -1719,3 +1719,17 @@ atabus_rescan(device_t self, const char *ifattr, const int *locators)
return 0;
}
void
ata_delay(int ms, const char *msg, int flags)
{
if ((flags & (AT_WAIT | AT_POLL)) == AT_POLL) {
/*
* can't use tsleep(), we may be in interrupt context
* or taking a crash dump
*/
delay(ms * 1000);
} else {
kpause(msg, false, mstohz(ms), NULL);
}
}

5
sys/dev/ata/atavar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: atavar.h,v 1.90 2012/07/31 15:50:34 bouyer Exp $ */
/* $NetBSD: atavar.h,v 1.91 2013/04/03 17:15:07 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 Manuel Bouyer.
@ -193,7 +193,7 @@ struct ata_drive_datas {
*/
struct ata_bio {
volatile u_int16_t flags;/* cmd flags */
#define ATA_NOSLEEP 0x0001 /* Can't sleep */
/* 0x0001 free, was ATA_NOSLEEP */
#define ATA_POLL 0x0002 /* poll for completion */
#define ATA_ITSDONE 0x0004 /* the transfer is as done as it gets */
#define ATA_SINGLE 0x0008 /* transfer must be done in singlesector mode */
@ -464,6 +464,7 @@ void ata_probe_caps(struct ata_drive_datas *);
void ata_dmaerr(struct ata_drive_datas *, int);
#endif
void ata_queue_idle(struct ata_queue *);
void ata_delay(int, const char *, int);
#endif /* _KERNEL */
#endif /* _DEV_ATA_ATAVAR_H_ */

14
sys/dev/ata/sata_subr.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: sata_subr.c,v 1.20 2012/07/31 15:50:34 bouyer Exp $ */
/* $NetBSD: sata_subr.c,v 1.21 2013/04/03 17:15:07 bouyer Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
@ -33,7 +33,7 @@
* Common functions for Serial ATA.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sata_subr.c,v 1.20 2012/07/31 15:50:34 bouyer Exp $");
__KERNEL_RCSID(0, "$NetBSD: sata_subr.c,v 1.21 2013/04/03 17:15:07 bouyer Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
@ -80,7 +80,7 @@ sata_speed(uint32_t sstatus)
*/
uint32_t
sata_reset_interface(struct ata_channel *chp, bus_space_tag_t sata_t,
bus_space_handle_t scontrol_r, bus_space_handle_t sstatus_r)
bus_space_handle_t scontrol_r, bus_space_handle_t sstatus_r, int flags)
{
uint32_t scontrol, sstatus;
int i;
@ -94,17 +94,17 @@ sata_reset_interface(struct ata_channel *chp, bus_space_tag_t sata_t,
scontrol = SControl_IPM_NONE | SControl_SPD_ANY | SControl_DET_INIT;
bus_space_write_4 (sata_t, scontrol_r, 0, scontrol);
tsleep(chp, PRIBIO, "sataup", mstohz(50));
ata_delay(50, "sataup", flags);
scontrol &= ~SControl_DET_INIT;
bus_space_write_4(sata_t, scontrol_r, 0, scontrol);
tsleep(chp, PRIBIO, "sataup", mstohz(50));
ata_delay(50, "sataup", flags);
/* wait up to 1s for device to come up */
for (i = 0; i < 100; i++) {
sstatus = bus_space_read_4(sata_t, sstatus_r, 0);
if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV)
break;
tsleep(chp, PRIBIO, "sataup", mstohz(10));
ata_delay(10, "sataup", flags);
}
/*
* if we have a link up without device, wait a few more seconds
@ -112,7 +112,7 @@ sata_reset_interface(struct ata_channel *chp, bus_space_tag_t sata_t,
*/
if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV_NE) {
for (i = 0; i < 500; i++) {
tsleep(chp, PRIBIO, "sataup", mstohz(10));
ata_delay(10, "sataup", flags);
sstatus = bus_space_read_4(sata_t, sstatus_r, 0);
if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV)
break;

4
sys/dev/ata/satavar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: satavar.h,v 1.8 2012/07/31 15:50:34 bouyer Exp $ */
/* $NetBSD: satavar.h,v 1.9 2013/04/03 17:15:07 bouyer Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
@ -41,7 +41,7 @@
const char *sata_speed(uint32_t);
uint32_t sata_reset_interface(struct ata_channel *, bus_space_tag_t,
bus_space_handle_t, bus_space_handle_t);
bus_space_handle_t, bus_space_handle_t, int);
void sata_interpret_sig(struct ata_channel *, int, uint32_t);
#endif /* _DEV_ATA_SATAVAR_H_ */

21
sys/dev/ic/ahcisata_core.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ahcisata_core.c,v 1.46 2013/02/02 14:11:37 matt Exp $ */
/* $NetBSD: ahcisata_core.c,v 1.47 2013/04/03 17:15:07 bouyer Exp $ */
/*
* Copyright (c) 2006 Manuel Bouyer.
@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ahcisata_core.c,v 1.46 2013/02/02 14:11:37 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: ahcisata_core.c,v 1.47 2013/04/03 17:15:07 bouyer Exp $");
#include <sys/types.h>
#include <sys/malloc.h>
@ -748,7 +748,7 @@ end:
delay(500000);
/* clear port interrupt register */
AHCI_WRITE(sc, AHCI_P_IS(chp->ch_channel), 0xffffffff);
ahci_channel_start(sc, chp, AT_WAIT,
ahci_channel_start(sc, chp, flags,
(sc->sc_ahci_cap & AHCI_CAP_CLO) ? 1 : 0);
return 0;
}
@ -762,7 +762,7 @@ ahci_reset_channel(struct ata_channel *chp, int flags)
ahci_channel_stop(sc, chp, flags);
if (sata_reset_interface(chp, sc->sc_ahcit, achp->ahcic_scontrol,
achp->ahcic_sstatus) != SStatus_DET_DEV) {
achp->ahcic_sstatus, flags) != SStatus_DET_DEV) {
printf("%s: port %d reset failed\n", AHCINAME(sc), chp->ch_channel);
/* XXX and then ? */
}
@ -770,7 +770,7 @@ ahci_reset_channel(struct ata_channel *chp, int flags)
chp->ch_queue->active_xfer->c_kill_xfer(chp,
chp->ch_queue->active_xfer, KILL_RESET);
}
tsleep(&sc, PRIBIO, "ahcirst", mstohz(500));
ata_delay(500, "ahcirst", flags);
/* clear port interrupt register */
AHCI_WRITE(sc, AHCI_P_IS(chp->ch_channel), 0xffffffff);
/* clear SErrors and start operations */
@ -781,7 +781,7 @@ ahci_reset_channel(struct ata_channel *chp, int flags)
if ((((tfd & AHCI_P_TFD_ST) >> AHCI_P_TFD_ST_SHIFT)
& WDCS_BSY) == 0)
break;
tsleep(&sc, PRIBIO, "ahcid2h", mstohz(10));
ata_delay(10, "ahcid2h", flags);
}
if (i == AHCI_RST_WAIT)
aprint_error("%s: BSY never cleared, TD 0x%x\n",
@ -825,7 +825,7 @@ ahci_probe_drive(struct ata_channel *chp)
AHCI_P_CMD_POD | AHCI_P_CMD_SUD);
/* reset the PHY and bring online */
switch (sata_reset_interface(chp, sc->sc_ahcit, achp->ahcic_scontrol,
achp->ahcic_sstatus)) {
achp->ahcic_sstatus, AT_WAIT)) {
case SStatus_DET_DEV:
tsleep(&sc, PRIBIO, "ahcidv", mstohz(500));
if (sc->sc_ahci_cap & AHCI_CAP_SPM) {
@ -1198,14 +1198,11 @@ ahci_bio_start(struct ata_channel *chp, struct ata_xfer *xfer)
/*
* Polled command.
*/
for (i = 0; i < ATA_DELAY / 10; i++) {
for (i = 0; i < ATA_DELAY * 10; i++) {
if (ata_bio->flags & ATA_ITSDONE)
break;
ahci_intr_port(sc, achp);
if (ata_bio->flags & ATA_NOSLEEP)
delay(10000);
else
tsleep(&xfer, PRIBIO, "ahcipl", mstohz(10));
delay(100);
}
AHCIDEBUG_PRINT(("%s port %d poll end GHC 0x%x IS 0x%x list 0x%x%x fis 0x%x%x CMD 0x%x CI 0x%x\n", AHCINAME(sc), channel,
AHCI_READ(sc, AHCI_GHC), AHCI_READ(sc, AHCI_IS),

13
sys/dev/ic/mvsata.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: mvsata.c,v 1.29 2013/02/10 21:21:29 jakllsch Exp $ */
/* $NetBSD: mvsata.c,v 1.30 2013/04/03 17:15:07 bouyer Exp $ */
/*
* Copyright (c) 2008 KIYOHARA Takashi
* All rights reserved.
@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mvsata.c,v 1.29 2013/02/10 21:21:29 jakllsch Exp $");
__KERNEL_RCSID(0, "$NetBSD: mvsata.c,v 1.30 2013/04/03 17:15:07 bouyer Exp $");
#include "opt_mvsata.h"
@ -517,7 +517,7 @@ mvsata_probe_drive(struct ata_channel *chp)
uint32_t sstat, sig;
sstat = sata_reset_interface(chp, mvport->port_iot,
mvport->port_sata_scontrol, mvport->port_sata_sstatus);
mvport->port_sata_scontrol, mvport->port_sata_sstatus, AT_WAIT);
switch (sstat) {
case SStatus_DET_DEV:
mvsata_pmp_select(mvport, PMP_PORT_CTL);
@ -607,7 +607,7 @@ mvsata_reset_channel(struct ata_channel *chp, int flags)
mvsata_hreset_port(mvport);
sstat = sata_reset_interface(chp, mvport->port_iot,
mvport->port_sata_scontrol, mvport->port_sata_sstatus);
mvport->port_sata_scontrol, mvport->port_sata_sstatus, flags);
if (flags & AT_WAIT && sstat == SStatus_DET_DEV_NE &&
sc->sc_gen != gen1) {
@ -623,7 +623,8 @@ mvsata_reset_channel(struct ata_channel *chp, int flags)
mvsata_hreset_port(mvport);
sata_reset_interface(chp, mvport->port_iot,
mvport->port_sata_scontrol, mvport->port_sata_sstatus);
mvport->port_sata_scontrol, mvport->port_sata_sstatus,
flags);
}
for (i = 0; i < MVSATA_EDMAQ_LEN; i++) {
@ -2651,7 +2652,7 @@ mvsata_edma_wait(struct mvsata_port *mvport, struct ata_xfer *xfer, int timeout)
for (xtime = 0; xtime < timeout / 10; xtime++) {
if (mvsata_edma_handle(mvport, xfer))
return 0;
if (ata_bio->flags & ATA_NOSLEEP)
if (ata_bio->flags & ATA_POLL)
delay(10000);
else
tsleep(&xfer, PRIBIO, "mvsataipl", mstohz(10));

8
sys/dev/ic/siisata.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: siisata.c,v 1.23 2012/10/22 16:43:05 jakllsch Exp $ */
/* $NetBSD: siisata.c,v 1.24 2013/04/03 17:15:07 bouyer Exp $ */
/* from ahcisata_core.c */
@ -79,7 +79,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: siisata.c,v 1.23 2012/10/22 16:43:05 jakllsch Exp $");
__KERNEL_RCSID(0, "$NetBSD: siisata.c,v 1.24 2013/04/03 17:15:07 bouyer Exp $");
#include <sys/types.h>
#include <sys/malloc.h>
@ -630,7 +630,7 @@ siisata_reset_channel(struct ata_channel *chp, int flags)
DEBUG_FUNCS);
if (sata_reset_interface(chp, sc->sc_prt, schp->sch_scontrol,
schp->sch_sstatus) != SStatus_DET_DEV) {
schp->sch_sstatus, flags) != SStatus_DET_DEV) {
aprint_error("%s port %d: reset failed\n",
SIISATANAME(sc), chp->ch_channel);
/* XXX and then ? */
@ -687,7 +687,7 @@ siisata_probe_drive(struct ata_channel *chp)
siisata_disable_port_interrupt(chp);
switch(sata_reset_interface(chp, sc->sc_prt, schp->sch_scontrol,
schp->sch_sstatus)) {
schp->sch_sstatus, AT_WAIT)) {
case SStatus_DET_DEV:
/* clear any interrupts */
(void)PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));

6
sys/dev/ic/wdc.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: wdc.c,v 1.277 2013/02/03 20:13:28 jakllsch Exp $ */
/* $NetBSD: wdc.c,v 1.278 2013/04/03 17:15:07 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001, 2003 Manuel Bouyer. All rights reserved.
@ -58,7 +58,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wdc.c,v 1.277 2013/02/03 20:13:28 jakllsch Exp $");
__KERNEL_RCSID(0, "$NetBSD: wdc.c,v 1.278 2013/04/03 17:15:07 bouyer Exp $");
#include "opt_ata.h"
#include "opt_wdc.h"
@ -211,7 +211,7 @@ wdc_sataprobe(struct ata_channel *chp)
/* reset the PHY and bring online */
switch (sata_reset_interface(chp, wdr->sata_iot, wdr->sata_control,
wdr->sata_status)) {
wdr->sata_status, AT_WAIT)) {
case SStatus_DET_DEV:
/* wait 5s for BSY to clear */
for (i = 0; i < WDC_PROBE_WAIT * hz; i++) {

8
sys/dev/usb/umass_isdata.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: umass_isdata.c,v 1.27 2012/07/31 15:50:37 bouyer Exp $ */
/* $NetBSD: umass_isdata.c,v 1.28 2013/04/03 17:15:07 bouyer Exp $ */
/*
* TODO:
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: umass_isdata.c,v 1.27 2012/07/31 15:50:37 bouyer Exp $");
__KERNEL_RCSID(0, "$NetBSD: umass_isdata.c,v 1.28 2013/04/03 17:15:07 bouyer Exp $");
#ifdef _KERNEL_OPT
#include "opt_umass.h"
@ -288,8 +288,8 @@ uisdata_bio1(struct ata_drive_datas *drv, struct ata_bio *ata_bio)
DPRINTF(("%s\n", __func__));
/* XXX */
if (ata_bio->flags & ATA_NOSLEEP) {
printf("%s: ATA_NOSLEEP not supported\n", __func__);
if (ata_bio->flags & ATA_POLL) {
printf("%s: ATA_POLL not supported\n", __func__);
ata_bio->error = TIMEOUT;
ata_bio->flags |= ATA_ITSDONE;
return (ATACMD_COMPLETE);