src/sys/dev/mmc, branch release/8.1.0

MFC 196403: Temporarily revert the new-bus locking for 8.0 release.

2009-08-20T20:23:28Z

Approved by: re (kib)

Make the newbus subsystem Giant free by adding the new newbus sxlock.

2009-08-02T14:28:40Z

The newbus lock is responsible for protecting newbus internIal structures, device states and devclass flags. It is necessary to hold it when all such datas are accessed. For the other operations, softc locking should ensure enough protection to avoid races. Newbus lock is automatically held when virtual operations on the device and bus are invoked when loading the driver or when the suspend/resume take place. For other 'spourious' operations trying to access/modify the newbus topology, newbus lock needs to be automatically acquired and dropped. For the moment Giant is also acquired in some key point (modules subsystem) in order to avoid problems before the 8.0 release as module handlers could make assumptions about it. This Giant locking should go just after the release happens. Please keep in mind that the public interface can be expanded in order to provide more support, if there are really necessities at some point and also some bugs could arise as long as the patch needs a bit of further testing. Bump __FreeBSD_version in order to reflect the newbus lock introduction. Reviewed by: ed, hps, jhb, imp, mav, scottl No answer by: ariff, thompsa, yongari Tested by: pho, G. Trematerra , Brandon Gooch Sponsored by: Yahoo! Incorporated Approved by: re (ksmith)

read_ivar takes a uintptr_t * not a u_char *.

2009-03-12T06:36:44Z

Add kernel dumping support. Works fine with sdhci controller driver.

2009-02-17T19:17:25Z

o Define some symbols for a few items that are bare constants in the

2009-02-03T04:28:45Z

code. o Use NULL in preference to 0 for a few pointers. o default to bus timing normal, like we default to bus_width_1.

Add one more debug level.

2009-01-28T23:18:21Z

Improve mmc driver verbose logging.

2009-01-28T22:09:00Z

Make requests logging controllable by hw.mmc.debug sysctl.

Default to normal bus timing mode on SD cards. In practice, most

2009-01-21T17:49:23Z

cards people have today support high speed mode, so the timing field would be initialized to bus_timing_hs, but there are some slow cards...

Fix minor style nit for file consistency.

2009-01-21T17:34:14Z

Make the command reporting be under boot verbose.

2009-01-21T17:28:24Z

Also, report a few other things under boot verbose. Small style nit to make new code look like old code in this file.