Date: Fri, 30 Jan 2009 23:44:02 -0800 From: Sean Bruno <sean.bruno@dsl-only.net> To: freebsd-firewire <freebsd-firewire@FreeBSD.org> Cc: scottl@freebsd.org Subject: Updates to -current Message-ID: <1233387842.5501.12.camel@localhost.localdomain>
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--=-QNJOa6ajW4EoGtwe+FA6
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Here is an update to -current that I am working on.
This update fixes the following:
SBP was not properly detaching from CAM if a target is powered off or
disconnected from the firewire bus. This would manifest itself by
causing things like "camcontrol rescan all" to hang indefinitely.
SBP would have panic'd in sbp_orb_pointer() if fw_asyreq() failed.
Add locking during BUS_RESET conditions to keep the bus_reset handler
from firing before the code was finished asserting the BUS_RESET
condition.
Remove FWOHCI_INTFILT as the bus reset handler really does WAY more than
it should.
Rework the generation indicator/flag to more properly adhere to the
specifications. In this context, the generation flag should be 0 or 1
to indicate that the CROM has changed. It should not be incremented
indefinitely without bounds.
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Content-Disposition: attachment; filename="firewire.diff"
Content-Type: text/x-patch; name="firewire.diff"; charset="UTF-8"
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Index: fwohci_pci.c
===================================================================
--- fwohci_pci.c (revision 187939)
+++ fwohci_pci.c (working copy)
@@ -334,14 +334,11 @@
return ENXIO;
}
-
err = bus_setup_intr(self, sc->irq_res,
- INTR_TYPE_NET | INTR_MPSAFE,
-#if FWOHCI_INTFILT
- fwohci_filt, NULL, sc, &sc->ih);
-#else
- NULL, (driver_intr_t *) fwohci_intr, sc, &sc->ih);
-#endif
+ INTR_TYPE_NET | INTR_MPSAFE,
+ NULL, (driver_intr_t *) fwohci_intr,
+ sc, &sc->ih);
+
#if defined(__DragonFly__) || __FreeBSD_version < 500000
/* XXX splcam() should mask this irq for sbp.c*/
err = bus_setup_intr(self, sc->irq_res, INTR_TYPE_CAM,
Index: firewire.c
===================================================================
--- firewire.c (revision 187939)
+++ firewire.c (working copy)
@@ -430,6 +430,16 @@
fwdev_makedev(sc);
+ fc->crom_src_buf = (struct crom_src_buf *)malloc(
+ sizeof(struct crom_src_buf),
+ M_FW, M_NOWAIT | M_ZERO);
+ fc->topology_map = (struct fw_topology_map *)malloc(
+ sizeof(struct fw_topology_map),
+ M_FW, M_NOWAIT | M_ZERO);
+ fc->speed_map = (struct fw_speed_map *)malloc(
+ sizeof(struct fw_speed_map),
+ M_FW, M_NOWAIT | M_ZERO);
+
mtx_init(&fc->wait_lock, "fwwait", NULL, MTX_DEF);
mtx_init(&fc->tlabel_lock, "fwtlabel", NULL, MTX_DEF);
CALLOUT_INIT(&fc->timeout_callout);
@@ -451,7 +461,9 @@
bus_generic_attach(dev);
/* bus_reset */
+ FW_GLOCK(fc);
fw_busreset(fc, FWBUSNOTREADY);
+ FW_GUNLOCK(fc);
fc->ibr(fc);
return 0;
@@ -642,11 +654,6 @@
{
struct crom_src *src;
- fc->crom_src_buf = (struct crom_src_buf *)
- malloc(sizeof(struct crom_src_buf), M_FW, M_WAITOK | M_ZERO);
- if (fc->crom_src_buf == NULL)
- return;
-
src = &fc->crom_src_buf->src;
bzero(src, sizeof(struct crom_src));
@@ -663,7 +670,7 @@
src->businfo.cyc_clk_acc = 100;
src->businfo.max_rec = fc->maxrec;
src->businfo.max_rom = MAXROM_4;
- src->businfo.generation = 1;
+ src->businfo.generation = 0;
src->businfo.link_spd = fc->speed;
src->businfo.eui64.hi = fc->eui.hi;
@@ -682,9 +689,6 @@
struct crom_src *src;
struct crom_chunk *root;
- if (fc->crom_src_buf == NULL)
- fw_init_crom(fc);
-
buf = fc->crom_src_buf;
src = fc->crom_src;
root = fc->crom_root;
@@ -715,18 +719,18 @@
struct firewire_dev_comm *fdc;
struct crom_src *src;
device_t *devlistp;
- void *newrom;
int i, devcnt;
- switch(fc->status){
- case FWBUSMGRELECT:
+ FW_GLOCK_ASSERT(fc);
+ if (fc->status == FWBUSMGRELECT)
callout_stop(&fc->bmr_callout);
- break;
- default:
- break;
- }
+
fc->status = new_status;
fw_reset_csr(fc);
+
+ if (fc->status == FWBUSNOTREADY)
+ fw_init_crom(fc);
+
fw_reset_crom(fc);
if (device_get_children(fc->bdev, &devlistp, &devcnt) == 0) {
@@ -739,19 +743,19 @@
free(devlistp, M_TEMP);
}
- newrom = malloc(CROMSIZE, M_FW, M_NOWAIT | M_ZERO);
src = &fc->crom_src_buf->src;
- crom_load(src, (uint32_t *)newrom, CROMSIZE);
- if (bcmp(newrom, fc->config_rom, CROMSIZE) != 0) {
- /* bump generation and reload */
- src->businfo.generation ++;
- /* generation must be between 0x2 and 0xF */
- if (src->businfo.generation < 2)
- src->businfo.generation ++;
- crom_load(src, (uint32_t *)newrom, CROMSIZE);
- bcopy(newrom, (void *)fc->config_rom, CROMSIZE);
- }
- free(newrom, M_FW);
+ /*
+ * If the old config rom needs to be overwritten,
+ * bump the businfo.generation indicator to
+ * indicate that we need to be reprobed
+ */
+ if (bcmp(src, fc->config_rom, CROMSIZE) != 0) {
+ /* generation is a 2 bit field */
+ /* valid values are only from 0 - 3 */
+ src->businfo.generation = 1;
+ bcopy(src, (void *)fc->config_rom, CROMSIZE);
+ } else
+ src->businfo.generation = 0;
}
/* Call once after reboot */
@@ -807,13 +811,7 @@
fc->ir[i]->maxq = FWMAXQUEUE;
fc->it[i]->maxq = FWMAXQUEUE;
}
-/* Initialize csr registers */
- fc->topology_map = (struct fw_topology_map *)malloc(
- sizeof(struct fw_topology_map),
- M_FW, M_NOWAIT | M_ZERO);
- fc->speed_map = (struct fw_speed_map *)malloc(
- sizeof(struct fw_speed_map),
- M_FW, M_NOWAIT | M_ZERO);
+
CSRARC(fc, TOPO_MAP) = 0x3f1 << 16;
CSRARC(fc, TOPO_MAP + 4) = 1;
CSRARC(fc, SPED_MAP) = 0x3f1 << 16;
@@ -1559,7 +1557,7 @@
/* unchanged ? */
if (bcmp(&csr[0], &fwdev->csrrom[0], sizeof(uint32_t) * 5) == 0) {
if (firewire_debug)
- printf("node%d: crom unchanged\n", node);
+ device_printf(fc->dev, "node%d: crom unchanged\n", node);
return (0);
}
Index: fwohci.c
===================================================================
--- fwohci.c (revision 187939)
+++ fwohci.c (working copy)
@@ -1003,7 +1003,7 @@
if (maxdesc < db_tr->dbcnt) {
maxdesc = db_tr->dbcnt;
if (firewire_debug)
- device_printf(sc->fc.dev, "maxdesc: %d\n", maxdesc);
+ device_printf(sc->fc.dev, "%s: maxdesc %d\n", __func__, maxdesc);
}
/* last db */
LAST_DB(db_tr, db);
@@ -1842,6 +1842,7 @@
struct firewire_comm *fc = (struct firewire_comm *)sc;
uint32_t node_id, plen;
+ FW_GLOCK_ASSERT(fc);
if ((stat & OHCI_INT_PHY_BUS_R) && (fc->status != FWBUSRESET)) {
fc->status = FWBUSRESET;
/* Disable bus reset interrupt until sid recv. */
@@ -1884,8 +1885,8 @@
plen = OREAD(sc, OHCI_SID_CNT);
fc->nodeid = node_id & 0x3f;
- device_printf(fc->dev, "node_id=0x%08x, gen=%d, ",
- node_id, (plen >> 16) & 0xff);
+ device_printf(fc->dev, "node_id=0x%08x, SelfID Count=%d, ",
+ fc->nodeid, (plen >> 16) & 0xff);
if (!(node_id & OHCI_NODE_VALID)) {
printf("Bus reset failure\n");
goto sidout;
@@ -1996,9 +1997,11 @@
{
struct fwohci_softc *sc = (struct fwohci_softc *)arg;
+ FW_GLOCK(&sc->fc);
fw_busreset(&sc->fc, FWBUSRESET);
OWRITE(sc, OHCI_CROMHDR, ntohl(sc->fc.config_rom[0]));
OWRITE(sc, OHCI_BUS_OPT, ntohl(sc->fc.config_rom[2]));
+ FW_GUNLOCK(&sc->fc);
}
static void
@@ -2010,6 +2013,10 @@
int i, plen;
+ /*
+ * We really should have locking
+ * here. Not sure why it's not
+ */
plen = OREAD(sc, OHCI_SID_CNT);
if (plen & OHCI_SID_ERR) {
@@ -2029,14 +2036,13 @@
}
for (i = 0; i < plen / 4; i ++)
buf[i] = FWOHCI_DMA_READ(sc->sid_buf[i+1]);
-#if 1 /* XXX needed?? */
+
/* pending all pre-bus_reset packets */
fwohci_txd(sc, &sc->atrq);
fwohci_txd(sc, &sc->atrs);
fwohci_arcv(sc, &sc->arrs, -1);
fwohci_arcv(sc, &sc->arrq, -1);
fw_drain_txq(fc);
-#endif
fw_sidrcv(fc, buf, plen);
free(buf, M_FW);
}
@@ -2061,6 +2067,7 @@
{
uint32_t stat, irstat, itstat;
+ FW_GLOCK_ASSERT(&sc->fc);
stat = OREAD(sc, FWOHCI_INTSTAT);
if (stat == 0xffffffff) {
device_printf(sc->fc.dev,
@@ -2090,29 +2097,24 @@
return (FILTER_HANDLED);
}
-int
-fwohci_filt(void *arg)
+void
+fwohci_intr(void *arg)
{
struct fwohci_softc *sc = (struct fwohci_softc *)arg;
- if (!(sc->intmask & OHCI_INT_EN)) {
- /* polling mode */
- return (FILTER_STRAY);
- }
- return (fwohci_check_stat(sc));
+ FW_GLOCK(&sc->fc);
+ fwohci_check_stat(sc);
+ FW_GUNLOCK(&sc->fc);
}
void
-fwohci_intr(void *arg)
-{
- fwohci_filt(arg);
-}
-
-void
fwohci_poll(struct firewire_comm *fc, int quick, int count)
{
struct fwohci_softc *sc = (struct fwohci_softc *)fc;
+
+ FW_GLOCK(fc);
fwohci_check_stat(sc);
+ FW_GUNLOCK(fc);
}
static void
@@ -2466,6 +2468,7 @@
device_printf(fc->dev, "Initiate bus reset\n");
sc = (struct fwohci_softc *)fc;
+ FW_GLOCK(fc);
/*
* Make sure our cached values from the config rom are
* initialised.
@@ -2486,6 +2489,7 @@
fun |= FW_PHY_ISBR | FW_PHY_RHB;
fun = fwphy_wrdata(sc, FW_PHY_ISBR_REG, fun);
#endif
+ FW_GUNLOCK(fc);
}
void
Index: sbp.c
===================================================================
--- sbp.c (revision 187939)
+++ sbp.c (working copy)
@@ -493,6 +493,7 @@
/* lost device */
sbp_cam_detach_sdev(sdev);
sbp_free_sdev(sdev);
+ target->luns[lun] = NULL;
}
}
@@ -781,7 +782,9 @@
SBP_UNLOCK(sbp);
}
sdev->status = SBP_DEV_RETRY;
- sbp_abort_all_ocbs(sdev, CAM_SCSI_BUS_RESET);
+ sbp_cam_detach_sdev(sdev);
+ sbp_free_sdev(sdev);
+ target->luns[i] = NULL;
break;
case SBP_DEV_PROBE:
case SBP_DEV_TOATTACH:
@@ -1255,11 +1258,18 @@
htonl(((sdev->target->sbp->fd.fc->nodeid | FWLOCALBUS )<< 16));
xfer->send.payload[1] = htonl((uint32_t)ocb->bus_addr);
+ /*
+ * sbp_xfer_free() will attempt to acquire
+ * the SBP lock on entrance. Also, this removes
+ * a LOR between the firewire layer and sbp
+ */
+ SBP_UNLOCK(sdev->target->sbp);
if(fw_asyreq(xfer->fc, -1, xfer) != 0){
sbp_xfer_free(xfer);
ocb->ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ocb->ccb);
}
+ SBP_LOCK(sdev->target->sbp);
}
static void
@@ -2123,6 +2133,7 @@
sdev->ocb[i].dmamap);
fwdma_free(sdev->target->sbp->fd.fc, &sdev->dma);
free(sdev, M_SBP);
+ sdev = NULL;
}
static void
Index: fwohcivar.h
===================================================================
--- fwohcivar.h (revision 187939)
+++ fwohcivar.h (working copy)
@@ -37,12 +37,6 @@
#include <sys/taskqueue.h>
-#if defined(__DragonFly__) || __FreeBSD_version < 700043
-#define FWOHCI_INTFILT 0
-#else
-#define FWOHCI_INTFILT 1
-#endif
-
typedef struct fwohci_softc {
struct firewire_comm fc;
bus_space_tag_t bst;
@@ -84,7 +78,7 @@
} fwohci_softc_t;
void fwohci_intr (void *arg);
-int fwohci_filt (void *arg);
+void fwohci_filt (void *arg);
int fwohci_init (struct fwohci_softc *, device_t);
void fwohci_poll (struct firewire_comm *, int, int);
void fwohci_reset (struct fwohci_softc *, device_t);
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