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296373 |
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04-Mar-2016 |
marius |
- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1 builds. - Update newvers.sh to reflect RC1. - Update __FreeBSD_version to reflect 10.3. - Update default pkg(8) configuration to use the quarterly branch.
Approved by: re (implicit) |
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260387 |
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07-Jan-2014 |
scottl |
MFC Alexander Motin's direct dispatch, multi-queue, and finer-grained locking support for CAM
r256826: Fix several target mode SIMs to not blindly clear ccb_h.flags field of ATIO CCBs. Not all CCB flags there belong to them.
r256836: Remove hard limit on number of BIOs handled with one ATA TRIM request.
r256843: Merge CAM locking changes from the projects/camlock branch to radically reduce lock congestion and improve SMP scalability of the SCSI/ATA stack, preparing the ground for the coming next GEOM direct dispatch support.
r256888: Unconditionally acquire periph reference on CCB allocation failure.
r256895: Fix memory and references leak due to unfreed path.
r256960: Move CAM_UNQUEUED_INDEX setting to the last moment and under the periph lock. This fixes race condition with cam_periph_ccbwait(), causing use-after-free.
r256975: Minor (mostly cosmetical) addition to r256960.
r257054: Some microoptimizations for da and ada drivers: - Replace ordered_tag_count counter with single flag; - From da remove outstanding_cmds counter, duplicating pending_ccbs list; - From da_softc remove unused links field.
r257482: Fix lock recursion, triggered by `smartctl -a /dev/adaX`.
r257501: Make getenv_*() functions and respectively TUNABLE_*_FETCH() macros not allocate memory and so not require sleepable environment. getenv() has already used on-stack temporary storage, so just use it more rationally. getenv_string() receives buffer as argument, so don't need another one.
r257914: Some CAM locks polishing: - Fix LOR and possible lock recursion when handling high-power commands. Introduce new lock to protect left power quota and list of frozen devices. - Correct locking around xpt periph creation. - Remove seems never used XPT_FLAG_OPEN xpt periph flag.
Again, Netflix assisted with testing the merge, but all of the credit goes to Alexander and iX Systems.
Submitted by: mav Sponsored by: iX Systems
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256281 |
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10-Oct-2013 |
gjb |
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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249224 |
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07-Apr-2013 |
mav |
Remove extra semicolons from CAM_SIM_[UN]LOCK() macros.
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#
235333 |
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12-May-2012 |
mav |
Add two functions xpt_batch_start() and xpt_batch_done() to the CAM SIM KPI to allow drivers to handle request completion directly without passing them to the CAM SWI thread removing extra context switch. Modify all ATA/SATA drivers to use them.
Reviewed by: gibbs, ken MFC after: 2 weeks
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227637 |
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17-Nov-2011 |
mav |
Introduce CAM_SIM_POLLED SIM flag, indicating that it works in polling mode. It blocks CAM SWI usage on requests completion, unneeded because of polling and denied during kernel dumping because of blocked scheduler.
Before r198899 there was periph flag CAM_PERIPH_POLLED, but that was wrong, because there is whole SIM is polled or handled by SWI, not a single periph.
Tested by: kib MFC after: 1 month
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186396 |
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22-Dec-2008 |
scottl |
Fix a comment to reflect what really happens.
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186185 |
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16-Dec-2008 |
trasz |
Add SIM refcounting. This is slightly different from what DragonFly does - in DragonFly, it's cam_sim_release() what actually frees the SIM; cam_sim_free does nothing more than calling cam_sim_release(). Here, we drain in cam_sim_free, waiting for refcount to drop to zero. We cannot do the same think DragonFly does, because after cam_sim_free returns, client would destroy the sim->mtx, and CAM would trip over an initialized mutex.
Reviewed by: scottl Approved by: rwatson (mentor) Sponsored by: FreeBSD Foundation
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168864 |
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19-Apr-2007 |
scottl |
Split the camisr into per-SIM done queues. This optimizes the locking a little bit and allows for direct dispatch of the doneq from certain contexts that would otherwise face recursive locking problems.
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#
168752 |
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15-Apr-2007 |
scottl |
Remove Giant from CAM. Drivers (SIMs) now register a mutex that CAM will use to synchornize and protect all data objects that are used for that SIM. Drivers that are not yet MPSAFE register Giant and operate as usual. RIght now, no drivers are MPSAFE, though a few will be changed in the coming week as this work settles down.
The driver API has changed, so all CAM drivers will need to be recompiled. The userland API has not changed, so tools like camcontrol do not need to be recompiled.
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139743 |
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05-Jan-2005 |
imp |
Start each of the license/copyright comments with /*-
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71507 |
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24-Jan-2001 |
jhb |
Const'ify cam_sim.sim_name to quiet warnings.
Reviewed by: -scsi
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55206 |
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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.
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50477 |
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28-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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46581 |
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06-May-1999 |
ken |
Add a number of interrelated CAM feature enhancements and bug fixes.
NOTE: These changes will require recompilation of any userland applications, like cdrecord, xmcd, etc., that use the CAM passthrough interface. A make world is recommended.
camcontrol.[c8]: - We now support two new commands, "tags" and "negotiate".
- The tags commands allows users to view the number of tagged openings for a device as well as a number of other related parameters, and it allows users to set tagged openings for a device.
- The negotiate command allows users to enable and disable disconnection and tagged queueing, set sync rates, offsets and bus width. Note that not all of those features are available for all controllers. Only the adv, ahc, and ncr drivers fully support all of the features at this point. Some cards do not allow the setting of sync rates, offsets and the like, and some of the drivers don't have any facilities to do so. Some drivers, like the adw driver, only support enabling or disabling sync negotiation, but do not support setting sync rates.
- new description in the camcontrol man page of how to format a disk - cleanup of the camcontrol inquiry command - add support in the 'devlist' command for skipping unconfigured devices if -v was not specified on the command line. - make use of the new base_transfer_speed in the path inquiry CCB. - fix CCB bzero cases
cam_xpt.c, cam_sim.[ch], cam_ccb.h:
- new flags on many CCB function codes to designate whether they're non-immediate, use a user-supplied CCB, and can only be passed from userland programs via the xpt device. Use these flags in the transport layer and pass driver to categorize CCBs.
- new flag in the transport layer device matching code for device nodes that indicates whether a device is unconfigured
- bump the CAM version from 0x10 to 0x11
- Change the CAM ioctls to use the version as their group code, so we can force users to recompile code even when the CCB size doesn't change.
- add + fill in a new value in the path inquiry CCB, base_transfer_speed. Remove a corresponding field from the cam_sim structure, and add code to every SIM to set this field to the proper value.
- Fix the set transfer settings code in the transport layer.
scsi_cd.c:
- make some variables volatile instead of just casting them in various places - fix a race condition in the changer code - attach unless we get a "logical unit not supported" error. This should fix all of the cases where people have devices that return weird errors when they don't have media in the drive.
scsi_da.c:
- attach unless we get a "logical unit not supported" error
scsi_pass.c:
- for immediate CCBs, just malloc a CCB to send the user request in. This gets rid of the 'held' count problem in camcontrol tags.
scsi_pass.h:
- change the CAM ioctls to use the CAM version as their group code.
adv driver:
- Allow changing the sync rate and offset separately.
adw driver
- Allow changing the sync rate and offset separately.
aha driver:
- Don't return CAM_REQ_CMP for SET_TRAN_SETTINGS CCBs.
ahc driver:
- Allow setting offset and sync rate separately
bt driver:
- Don't return CAM_REQ_CMP for SET_TRAN_SETTINGS CCBs.
NCR driver:
- Fix the ultra/ultra 2 negotiation bug - allow setting both the sync rate and offset separately
Other HBA drivers: - Put code in to set the base_transfer_speed field for XPT_GET_TRAN_SETTINGS CCBs.
Reviewed by: gibbs, mjacob (isp), imp (aha)
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#
39212 |
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15-Sep-1998 |
gibbs |
CAM Transport Layer (XPT).
Submitted by: The CAM Team
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