src/sys/dev/twa, branch release/9.3.0

Merge r254263:

2013-08-13T22:05:50Z

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. Candidate for 9.2 Submitted by: jhb Reviewed by: jfv, marius, adrian, achim

MFC r249468:

2013-07-08T15:54:38Z

Stop abusing xpt_periph in random plases that really have no periph related to CCB, for example, bus scanning. NULL value is fine in such cases and it is correctly logged in debug messages as "noperiph". If at some point we need some real XPT periphs (alike to pmpX now), quite likely they will be per-bus, and not a single global instance as xpt_periph now.

MFC r248583 (by kib):

2013-06-18T13:38:10Z

Fix twa(4) after the r246713. The driver copies data around to satisfy some alignment restrictions. Do not set TW_OSLI_REQ_FLAGS_CCB flag for mapped data, pass the csio->data_ptr in the req->data. Do not put the ccb pointer into req->data ever, ccb is stored in req->orig_req already. Submitted by: Shuichi KITAGUCHI PR: kern/177020

MFC r242827 (by rdivacky):

2013-06-18T13:36:15Z

Give tw_osl_dbg_printf format string to pacify clang warning.

MFC r228526 (by kevlo):

2013-06-18T13:34:37Z

s/timout/timeout

Big MFC of the physbio changes necessary for unmapped I/O. These changes

2013-06-18T00:36:53Z

have been in production at Netflix for several months with significant success. MFC r246713: Reform the busdma API so that new types may be added without modifying every architecture's busdma_machdep.c. It is done by unifying the bus_dmamap_load_buffer() routines so that they may be called from MI code. The MD busdma is then given a chance to do any final processing in the complete() callback. MFC r249538: Some compilers issue a warning when wider integer is casted to narrow pointer. Supposedly shut down the warning by casting through uintptr_t. MFC r251479: Simplify the checking of flags for cam_periph_mapmem(). This gets rid of a lot of code redundancy and grossness at very minor expense. MFC r251837: MFC r251842: Add infrastructure for doing compatibility shims, as has been sorely needed for the last 10 years. Far too much of the internal API is exposed, and every small adjustment causes applications to stop working. To kick this off, bump the API version to 0x17 as should have been done with r246713, but add shims to compensate. Thanks to the shims, there should be no visible change in application behavior. Submitted by: kib, jeffr Approved by: kib Obtained from: Netflix

MFC r227293 (by ed):

2013-04-05T08:22:11Z

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. This means that their use is restricted to a single C file.

MFC r237460:

2012-06-25T07:09:36Z

Return CAM_SEL_TIMEOUT and CAM_DEV_NOT_THERE instead of CAM_TID_INVALID and CAM_LUN_INVALID for case of missing devices. In removes tons of error messages from CAM during bus scans. Reported and tested by: Mike Tancsa

MFC 232669:

2012-03-30T17:38:28Z

Use bus_get_dma_tag() to inherit the 4G boundary restriction from the parent PCI bus and remove the home-grown version in this driver.

MFC r226173, r227843, r227848 and r227908:

2011-12-31T14:12:12Z

Use DEVMETHOD_END to mark end of device methods. Remove superfluous device methods. Add some missing __FBSBID() macros.