FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F8.2.0_cvs 2011-02-16T16:18:46Z 2011-02-16T16:18:46Z Ken Smith kensmith@FreeBSD.org 2011-02-16T16:18:46Z urn:sha1:dec99dafe5763ba1db6950342aa80a634169c083 Approved by: re (implicit) This commit was manufactured to restore the state of the 8.2-RELEASE image. 2009-02-05T19:31:55Z Warner Losh imp@FreeBSD.org 2009-02-05T19:31:55Z urn:sha1:3fd8527379e21cda1c73c0987e629e4912c761a0 2009-01-21T23:10:06Z John Baldwin jhb@FreeBSD.org 2009-01-21T23:10:06Z urn:sha1:2067d312d40c5e179c240a796d047fe4c8e276ee - To avoid having a bunch of locks that end up always getting acquired as a group, give each ppc(4) device a mutex which it shares with all the child devices including ppbus(4), lpt(4), plip(4), etc. This mutex is then used for all the locking. - Rework the interrupt handling stuff yet again. Now ppbus drivers setup their interrupt handler during attach and tear it down during detach like most other drivers. ppbus(4) only invokes the interrupt handler of the device that currently owns the bus (if any) when an interrupt occurs, however. Also, interrupt handlers in general now accept their softc pointers as their argument rather than the device_t. Another feature of the ppbus interrupt handlers is that they are called with the parent ppc device's lock already held. This minimizes the number of lock operations during an interrupt. - Mark plip(4), lpt(4), pcfclock(4), ppi(4), vpo(4) MPSAFE. - lpbb(4) uses the ppc lock instead of Giant. - Other plip(4) changes: - Add a mutex to protect the global tables in plip(4) and free them on module unload. - Add a detach routine. - Split out the init/stop code from the ioctl routine into separate functions. - Other lpt(4) changes: - Use device_printf(). - Use a dedicated callout for the lptout timer. - Allocate the I/O buffers at attach and detach rather than during open and close as this simplifies the locking at the cost of 1024+32 bytes when the driver is attached. - Other ppi(4) changes: - Use an sx lock to serialize open and close. - Remove unused HADBUS flag. - Add a detach routine. - Use a malloc'd buffer for each read and write to avoid races with concurrent read/write. - Other pps(4) changes: - Use a callout rather than a callout handle with timeout(). - Conform to the new ppbus requirements (regular mutex, non-filter interrupt handler). pps(4) is probably going to have to become a standalone driver that doesn't use ppbus(4) to satisfy it's requirements for low latency as a result. - Use an sx lock to serialize open and close. - Other vpo(4) changes: - Use the parent ppc device's lock to create the CAM sim instead of Giant. - Other ppc(4) changes: - Fix ppc_isa's detach method to detach instead of calling attach. Tested by: no one :-( 2008-11-16T17:42:02Z John Baldwin jhb@FreeBSD.org 2008-11-16T17:42:02Z urn:sha1:284c87f60ea12364d2cbf81ae2ebd1fd9c7ca788 2008-10-22T19:39:16Z John Baldwin jhb@FreeBSD.org 2008-10-22T19:39:16Z urn:sha1:ff80967485d23d23b4992c1fa6f69bfe7110a57e 2008-10-21T18:30:10Z John Baldwin jhb@FreeBSD.org 2008-10-21T18:30:10Z urn:sha1:ae6b868a2adacd6235c403cd2ca8aa7ec0c14399 other fixes: - Add pointers back to device_t objects in softc structures instead of storing the unit and using devclass_get_device(). - Add 'lpbb', 'pcf', 'pps', and 'vpo' child devices to every 'ppbus' device instead of just the first one. - Store softc pointers in si_drv1 of character devices instead of pulling the unit number from the minor number and using devclass_get_softc() and devclass_get_device(). - Store the LP_BYPASS flag in si_drv2 instead of encoding it in the minor number. - Destroy character devices for lpt(4) when detaching the device. - Use bus_print_child_footer() instead of duplicating it in ppbus_print_child() and fix ppbus_print_child()'s return value. - Remove unused AVM ivar from ppbus. - Don't store the 'mode' ivar in the ppbus ivars since we always fetch it from the parent anyway. - Try to detach all the child devices before deleting them in ppbus_detach(). - Use pause() instead of a tsleep() on a dummy address when polling the ppbus. - Use if_printf() and device_printf() instead of explicit names with unit numbers. Silence on: current@ 2008-09-15T22:26:32Z John Baldwin jhb@FreeBSD.org 2008-09-15T22:26:32Z urn:sha1:ca3d37955c7c41e64a80c97b3f1c1fa4e9ff4897 - Retire IVARs for passing IRQs around. Instead, ppbus and ppc now allow child devices to access the interrupt by via a rid 0 IRQ resource using bus_alloc_resource_any(). - ppc creates its own interrupt event to manage the interrupt handlers of child devices. ppc does not allow child devices to use filters. It could allow this if needed, but none of the current drivers use them and it adds a good bit of complication. It uses intr_event_execute_handlers() to fire the child device interrupt handlers from its threaded interrupt handler. - Remove the ppbus_dummy_intr() hack. Now the ppc device always has an interrupt handler registered and we no longer bounce all the way up to nexus to manage adding/removing ppbus child interrupt handlers. Instead, the child handlers are added and removed to the private interrupt event in the ppc device. 2008-08-22T18:43:19Z John Baldwin jhb@FreeBSD.org 2008-08-22T18:43:19Z urn:sha1:8fd40d8a9efddbe0ee2985ffceeca4a72c86e32f from softc. 2007-03-21T03:38:37Z Yoshihiro Takahashi nyan@FreeBSD.org 2007-03-21T03:38:37Z urn:sha1:41f5bd0f6dc8a92fde5135b6c674e35d4b96501e bus_release_resource(). This is needed for pc98 by upcoming nexus related change. 2007-03-06T11:36:33Z Paolo Pisati piso@FreeBSD.org 2007-03-06T11:36:33Z urn:sha1:72565ac3e8a1fc7d4282968a8e4d3ad176f3d935 o Fix a bit the indentation.