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

MFC r262572:

2014-03-14T01:05:32Z

Get rid of the 'chan' from softc structure and use the latter directly as sleep channel. PR: kern/174684 Submitted by: jmg

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.

Merge the second part of the unmapped I/O changes. This enables the

2013-06-18T05:21:40Z

infrastructure in the block layer and UFS filesystem as well as a few drivers. The list of MFC revisions is long, so I won't quote changelogs. r248508,248510,248511,248512,248514,248515,248516,248517,248518, 248519,248520,248521,248550,248568,248789,248790,249032,250936 Submitted by: kib Approved by: kib Obtained from: Netflix

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 r241753:

2012-10-20T07:38:42Z

Integrate changes from LSI vendor driver 10.80.00.005 to FreeBSD. PR: kern/172833 Submitted by: "Charles O'Donnell"

MFC r240901:

2012-10-09T19:55:12Z

Use CAM_SEL_TIMEOUT and CAM_DEV_NOT_THERE to report missing targets or LUNs respectively. This removes a huge number of error messages from CAM during bus scans.

MFC r240900:

2012-10-09T19:53:15Z

Specify MTX_RECURSE for the controller's io_lock. Without it, tws(4) immediately panics on boot with INVARIANTS enabled. The driver already clearly expects to be able to recurse on this mutex - the main I/O path is always recursing on this lock.

MFC 232854,232874,232882,232883,232886 for bus_get_dma_tag()

2012-03-16T08:46:58Z

MFC 229416 + 223200:

2012-01-17T01:28:43Z

Don't forget to release queue lock when allocation of memory failed. Submitted by: Sascha Wildner Obtained from: DragonFly