scottl 28bd1409da Update PCI drivers to no longer look at the MEMIO-enabled bit in the PCI ... command register. The lazy BAR allocation code in FreeBSD sometimes disables this bit when it detects a range conflict, and will re-enable it on demand when a driver allocates the BAR. Thus, the bit is no longer a reliable indication of capability, and should not be checked. This results in the elimination of a lot of code from drivers, and also gives the opportunity to simplify a lot of drivers to use a helper API to set the busmaster enable bit. This changes fixes some recent reports of disk controllers and their associated drives/enclosures disappearing during boot. Submitted by: jhb Reviewed by: jfv, marius, achadd, achim MFC after: 1 day		2013-08-12 23:30:01 +00:00
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bt_eisa.c	Add locking to the bt(4) driver and mark it MPSAFE.	2012-10-15 16:13:55 +00:00
bt_isa.c	Add locking to the bt(4) driver and mark it MPSAFE.	2012-10-15 16:13:55 +00:00
bt_mca.c	Add locking to the bt(4) driver and mark it MPSAFE.	2012-10-15 16:13:55 +00:00
bt_pci.c	Update PCI drivers to no longer look at the MEMIO-enabled bit in the PCI	2013-08-12 23:30:01 +00:00
bt.c	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
btreg.h	Add locking to the bt(4) driver and mark it MPSAFE.	2012-10-15 16:13:55 +00:00