#
267654 |
|
19-Jun-2014 |
gjb |
Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
#
256220 |
|
09-Oct-2013 |
mav |
MFC r253958: Change CCB queue resize logic to be able safely handle overallocations: - (re)allocate queue space in power of 2 chunks with 64 elements minimum and never shrink it; with only 4/8 bytes per element size is insignificant. - automatically reallocate the queue to double size if it is overflowed. - if queue reallocation failed, store extra CCBs in unsorted TAILQ, fetching them back as soon as some queue element is freed.
To free space in CCB for TAILQ linking, change highpowerq from keeping high-power CCBs to keeping devices frozen due to high-power CCBs.
This encloses all pieces of queue resize logic inside of cam_queue.[ch], removing some not obvious duties from xpt_release_ccb().
|
#
256216 |
|
09-Oct-2013 |
mav |
MFC r249466, r249481, r250025: Remove multilevel freezing mechanism, implemented to handle specifics of the ATA/SATA error recovery, when post-reset recovery commands should be allocated when queues are already full of payload requests. Instead of removing frozen CCBs with specified range of priorities from the queue to provide free openings, use simple hack, allowing explicit CCBs over- allocation for requests with priority higher (numerically lower) then CAM_PRIORITY_OOB threshold.
Simplify CCB allocation logic by removing SIM-level allocation queue. After that SIM-level queue manages only CCBs execution, while allocation logic is localized within each single device.
|
#
225736 |
|
22-Sep-2011 |
kensmith |
Copy head to stable/9 as part of 9.0-RELEASE release cycle.
Approved by: re (implicit)
|
#
203108 |
|
28-Jan-2010 |
mav |
MFp4: Large set of CAM inprovements.
- Unify bus reset/probe sequence. Whenever bus attached at boot or later, CAM will automatically reset and scan it. It allows to remove duplicate code from many drivers. - Any bus, attached before CAM completed it's boot-time initialization, will equally join to the process, delaying boot if needed. - New kern.cam.boot_delay loader tunable should help controllers that are still unable to register their buses in time (such as slow USB/ PCCard/ CardBus devices), by adding one more event to wait on boot. - To allow synchronization between different CAM levels, concept of requests priorities was extended. Priorities now split between several "run levels". Device can be freezed at specified level, allowing higher priority requests to pass. For example, no payload requests allowed, until PMP driver enable port. ATA XPT negotiate transfer parameters, periph driver configure caching and so on. - Frozen requests are no more counted by request allocation scheduler. It fixes deadlocks, when frozen low priority payload requests occupying slots, required by higher levels to manage theit execution. - Two last changes were holding proper ATA reinitialization and error recovery implementation. Now it is done: SATA controllers and Port Multipliers now implement automatic hot-plug and should correctly recover from timeouts and bus resets. - Improve SCSI error recovery for devices on buses without automatic sense reporting, such as ATAPI or USB. For example, it allows CAM to wait, while CD drive loads disk, instead of immediately return error status. - Decapitalize diagnostic messages and make them more readable and sensible. - Teach PMP driver to limit maximum speed on fan-out ports. - Make boot wait for PMP scan completes, and make rescan more reliable. - Fix pass driver, to return CCB to user level in case of error. - Increase number of retries in cd driver, as device may return several UAs.
|
#
199281 |
|
14-Nov-2009 |
mav |
MFp4: Some more missed parts from previous commits.
|
#
198377 |
|
22-Oct-2009 |
mav |
After thinking again, implement cam_ccbq_fini(). This is effectively NULL change, but makes this API a bit more consistent.
|
#
198372 |
|
22-Oct-2009 |
mav |
cam_ccbq_fini() declared for 11 years, but never implemented. Remove it.
|
#
139743 |
|
05-Jan-2005 |
imp |
Start each of the license/copyright comments with /*-
|
#
60938 |
|
26-May-2000 |
jake |
Back out the previous change to the queue(3) interface. It was not discussed and should probably not happen.
Requested by: msmith and others
|
#
60833 |
|
23-May-2000 |
jake |
Change the way that the queue(3) structures are declared; don't assume that the type argument to *_HEAD and *_ENTRY is a struct.
Suggested by: phk Reviewed by: phk Approved by: mdodd
|
#
55206 |
|
29-Dec-1999 |
peter |
Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
|
#
50477 |
|
27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
|
#
45844 |
|
19-Apr-1999 |
gibbs |
cam_periph.c: Move handling of CAM_AUTOSENSE_FAIL into block dealing with all other scsi status errors.
cam_queue.c: cam_queue.h: Fix 'off by one' heap bug in a more efficient manner. Since heap algorithms like to deal with indexes started from 1, offset our heap array pointer at allocation time to make this so for a C environment. This makes the implementation of the algorithm a bit more efficient.
cam_xpt.c: Use macros for accessing the head of the heap so that code is isolated from implementation details of the heap.
|
#
45441 |
|
07-Apr-1999 |
gibbs |
Remove camq_regen(). We already perform modular comparisons for generation counts, so no further steps to deal with generation count wrap are required.
Fix an off by one problem in the camq heap code.
|
#
41813 |
|
15-Dec-1998 |
gibbs |
Add definitions for TAILQ, LIST, and SLIST ccb_hdr queues.
|
#
39212 |
|
15-Sep-1998 |
gibbs |
CAM Transport Layer (XPT).
Submitted by: The CAM Team
|