Convert some DPRINTFs to USBHIST_LOG and allow usbdebug, ehcidebug and
umassdebug to be changed via sysctl.
Remove the #define mess in usb.h.
This was started by mrg@ and updated by reinoud@
designated initializers.
I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.
before invoking xfer callbacks on this pipe.
- Add an extra flags parameter to usb_init_task. If USBD_TASKQ_MPSAFE is not
present, acquire KERNEL_LOCK before invoking the task callback.
usb_create_event_thread() back into usb_doattach(), so that eg,
usb_discover() never operates when the root_hub is not setup.
fixes a crash joerg@ reported.
- create the task/event threads in usb_attach() so they're more likely
to be ready when usb_doattach() runs
- move the task thread creation into usb_once_init(), instead of having
some other method of only creating them once
initial work, and every one else who has tested things for me.
this is largely my fault at this point :-)
the main changes are something like:
- usbd_bus_methods{} gains a get_lock() to enable the
host controller to provide a lock for the USB code.
if the lock isn't provided, old-style protection is
(partially) applied.
- ehci/ohci/uhci have been converted to the new
interfaces, including mutex/cv/etc conversion.
- usbdivar.h contains a discussion about locking and
what locks are held for which method calls. more
to come for usbdi(9) here.
- audio drivers (uaudio, umidi, auvitek) have been
properly SMPified now that USB is ready.
- scsi drivers have been modified to take the kernel
lock explicitly before calling into scsi code.
- usb pipes are associated with a lock, that is the
same as the controller lock. (this could be split
up further in the future.)
- several usbfoo_locked() or usbfoo_unlocked()
functions have been added to the usbdi(9) to
enable functionality with or without the USB
lock (per controller) already being held.
the TODO.usbmp file has specific details on what is left to
do, including what device-specific changes should be done now
that the whole framework is ready.
(ya dependencies).
Cleanup usb_mem.c a little more and add block tracking code. Help find
corruption problems.
Comment out the SPEED check for ETTF. XXX why doesn't that work right?
by defining 'options USBVERBOSE' in the kernel config file (no change
from current behavior), or it can be loaded at boot time on those
architectures that support the boot loader's "load" command.
The module is built for all architectures, whether or not USB support
exists.
children will not detach, the instance is not left in an inconsistent
state.
If uhub(4) port is disconnected, forcefully detach the children on
that port.
Simplify detachment hooks. (sc_dying must die!)
Pass along and respect detachment flags, esp. DETACH_FORCE,
throughout.
-unifdef
-since the roothub attach doesn't use locators, don't call
config_stdsubmatch() -- it is a no-op in that case
-ifsubmatch has configuration and interface always set to useful values,
remove unnecessary checks
-remove now unused locator definitions from shared header
than a zero-terminated list; this makes the code simpler and also
hopefully fixes the recent "childdet" botch, see PR kern/38528
-handle the root hub specially a bit earlier, this allows to kick out
the "submatch" functions completely which needed to second-guess
from the port number (where "0" meant root hub")
(we could handle the root hub specially even earlier, but as done
now big parts of the hub emulation code are exercised regularely,
this would bitrot otherwise)
proclist_mutex and proclist_lock into a single adaptive mutex (proc_lock).
Implications:
- Inspecting process state requires thread context, so signals can no longer
be sent from a hardware interrupt handler. Signal activity must be
deferred to a soft interrupt or kthread.
- As the proc state locking is simplified, it's now safe to take exit()
and wait() out from under kernel_lock.
- The system spends less time at IPL_SCHED, and there is less lock activity.
