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- Introduce hw.firewire.hold_count sysctl MIB by popular demand.

Browse source 
This MIB specifies how many bus resets should be observed before the
lost device entry is removed. The default value is 3.
You can set this value to 0 if you want a SBP device to be detached from CAM
layer as soon as the device is physically detached like USB.
This commit is contained in:
Hidetoshi Shimokawa 2003-10-06 07:17:43 +00:00
parent d266c2db1c
commit bdc0dba68b
1 changed files with 24 additions and 18 deletions
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42
sys/dev/firewire/firewire.c
View file

@ -64,18 +64,19 @@ struct crom_src_buf {
struct crom_chunk hw;
};
int firewire_debug=0, try_bmr=1;
int firewire_debug=0, try_bmr=1, hold_count=3;
SYSCTL_INT(_debug, OID_AUTO, firewire_debug, CTLFLAG_RW, &firewire_debug, 0,
"FireWire driver debug flag");
SYSCTL_NODE(_hw, OID_AUTO, firewire, CTLFLAG_RD, 0, "FireWire Subsystem");
SYSCTL_INT(_hw_firewire, OID_AUTO, try_bmr, CTLFLAG_RW, &try_bmr, 0,
"Try to be a bus manager");
SYSCTL_INT(_hw_firewire, OID_AUTO, hold_count, CTLFLAG_RW, &hold_count, 0,
"Number of count of bus resets for removing lost device information");
MALLOC_DEFINE(M_FW, "firewire", "FireWire");
MALLOC_DEFINE(M_FWXFER, "fw_xfer", "XFER/FireWire");
#define FW_MAXASYRTY 4
#define FW_MAXDEVRCNT 4
devclass_t firewire_devclass;
@ -1227,28 +1228,19 @@ static void
fw_bus_probe(struct firewire_comm *fc)
{
int s;
struct fw_device *fwdev, *next;
struct fw_device *fwdev;
s = splfw();
fc->status = FWBUSEXPLORE;
fc->retry_count = 0;
/*
* Invalidate all devices, just after bus reset. Devices
* to be removed has not been seen longer time.
*/
for (fwdev = STAILQ_FIRST(&fc->devices); fwdev != NULL; fwdev = next) {
next = STAILQ_NEXT(fwdev, link);
/* Invalidate all devices, just after bus reset. */
STAILQ_FOREACH(fwdev, &fc->devices, link)
if (fwdev->status != FWDEVINVAL) {
fwdev->status = FWDEVINVAL;
fwdev->rcnt = 0;
} else if(fwdev->rcnt < FW_MAXDEVRCNT) {
fwdev->rcnt ++;
} else {
STAILQ_REMOVE(&fc->devices, fwdev, fw_device, link);
free(fwdev, M_FW);
}
}
fc->ongonode = 0;
fc->ongoaddr = CSRROMOFF;
fc->ongodev = NULL;
@ -1592,16 +1584,30 @@ nextnode:
static void
fw_attach_dev(struct firewire_comm *fc)
{
struct fw_device *fwdev;
struct fw_device *fwdev, *next;
struct fw_xfer *xfer;
int i, err;
device_t *devlistp;
int devcnt;
struct firewire_dev_comm *fdc;
STAILQ_FOREACH(fwdev, &fc->devices, link)
if (fwdev->status == FWDEVINIT)
for (fwdev = STAILQ_FIRST(&fc->devices); fwdev != NULL; fwdev = next) {
next = STAILQ_NEXT(fwdev, link);
if (fwdev->status == FWDEVINIT) {
fwdev->status = FWDEVATTACHED;
} else if (fwdev->status == FWDEVINVAL) {
fwdev->rcnt ++;
if (fwdev->rcnt > hold_count) {
/*
* Remove devices which have not been seen
* for a while.
*/
STAILQ_REMOVE(&fc->devices, fwdev, fw_device,
link);
free(fwdev, M_FW);
}
}
}
err = device_get_children(fc->bdev, &devlistp, &devcnt);
if( err != 0 )