Commit Graph

68 Commits

Author SHA1 Message Date
Alexander Motin
8c38cd7ceb Implement poll method for atapicam.
It is not perfect, but better then nothing.
2010-02-03 21:45:09 +00:00
Alexander Motin
fff784a8da Report to CAM unit number of underlying ataX bus device, instead of this
atapicamX. It is more apropriate and useful together with "ata" name.
2010-02-03 21:26:54 +00:00
Alexander Motin
83c5d981ac 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.
2010-01-28 08:41:30 +00:00
Alexander Motin
84f620d3e2 Report SATA speeds to CAM, to not confuse users with low numbers logged. 2009-10-26 11:26:49 +00:00
Alexander Motin
e8579543e8 Round timeout up when converting CAM milliseconds to ATA seconds. 2009-10-26 11:23:41 +00:00
Scott Long
52c9ce25d8 Separate the parallel scsi knowledge out of the core of the XPT, and
modularize it so that new transports can be created.

Add a transport for SATA

Add a periph+protocol layer for ATA

Add a driver for AHCI-compliant hardware.

Add a maxio field to CAM so that drivers can advertise their max
I/O capability.  Modify various drivers so that they are insulated
from the value of MAXPHYS.

The new ATA/SATA code supports AHCI-compliant hardware, and will override
the classic ATA driver if it is loaded as a module at boot time or compiled
into the kernel.  The stack now support NCQ (tagged queueing) for increased
performance on modern SATA drives.  It also supports port multipliers.

ATA drives are accessed via 'ada' device nodes.  ATAPI drives are
accessed via 'cd' device nodes.  They can all be enumerated and manipulated
via camcontrol, just like SCSI drives.  SCSI commands are not translated to
their ATA equivalents; ATA native commands are used throughout the entire
stack, including camcontrol.  See the camcontrol manpage for further
details.  Testing this code may require that you update your fstab, and
possibly modify your BIOS to enable AHCI functionality, if available.

This code is very experimental at the moment.  The userland ABI/API has
changed, so applications will need to be recompiled.  It may change
further in the near future.  The 'ada' device name may also change as
more infrastructure is completed in this project.  The goal is to
eventually put all CAM busses and devices until newbus, allowing for
interesting topology and management options.

Few functional changes will be seen with existing SCSI/SAS/FC drivers,
though the userland ABI has still changed.  In the future, transports
specific modules for SAS and FC may appear in order to better support
the topologies and capabilities of these technologies.

The modularization of CAM and the addition of the ATA/SATA modules is
meant to break CAM out of the mold of being specific to SCSI, letting it
grow to be a framework for arbitrary transports and protocols.  It also
allows drivers to be written to support discrete hardware without
jeopardizing the stability of non-related hardware.  While only an AHCI
driver is provided now, a Silicon Image driver is also in the works.
Drivers for ICH1-4, ICH5-6, PIIX, classic IDE, and any other hardware
is possible and encouraged.  Help with new transports is also encouraged.

Submitted by:	scottl, mav
Approved by:	re
2009-07-10 08:18:08 +00:00
Edward Tomasz Napierala
f095d54f01 Remove dead code.
Found with:	Coverity Prevent(tm)
CID:		556
2009-05-12 16:39:43 +00:00
Alexander Motin
ea74abd5f5 Revert my ata_identify()/ata_reinit() related changes: r189166, r189091
and partially r188903. Revert breaks new drives detection on reinit to the
state as it was before me, but fixes series of new bugs reported by some
people.

Unconditional queueing of ata_completed() calls can lead to deadlock if
due to timeout ata_reinit() was called at the same thread by previous
ata_completed(). Calling of ata_identify() on ata_reinit() in current
implementation opens numerous races and deadlocks.

Problems I was touching here are still exist and should be addresed, but
probably in different way.
2009-02-28 22:07:15 +00:00
Alexander Motin
84b59262f1 Rework device probing by moving ata_getparam() call from ata_identify() to
drivers' probe routines. It allows not to sleep and so not drop Giant inside
ata_identify() critical section and so avoid crash if it reentered on
request timeout. Reentering of probe call checked inside of it.

Give device own knowledge about it's type (ata/atapi/atapicam). It is not
a good idea to ask channel status for device type inside ata_getparam().

Add softc memory deallocation on device destruction.
2009-02-28 11:25:05 +00:00
Warner Losh
85d27a4f81 Correct signature for the identify routine. The bad parameter wasn't
used at all, so this is just a tidiness excersize.
2009-02-04 20:23:42 +00:00
Edward Tomasz Napierala
02caf36ee1 Make "kldunload atapicam" return EBUSY instead of deadlocking when a device
created by atapicam is being kept opened or mounted.  This is probably just
a temporary solution until we invent something better.

Reviewed by:	scottl
Approved by:	rwatson (mentor)
Sponsored by:	FreeBSD Foundation
Reported by:	Jaakko Heinonen
2009-01-08 17:26:51 +00:00
Søren Schmidt
104c094e06 Go back to preallocating everything possible on init.
This avoids calling busdma in the request processing path which caused a traumatic performance degradation.
Allocation has be postponed to after we know how many devices we possible can have on portmulitpliers to save some space.
2008-04-17 12:29:35 +00:00
Søren Schmidt
dca5e1abd5 Fix the brokenness in the former commit, sorry for the mess.
The problem is that the PM support is part of a much larger WIP here, but due to popular demand I decided to get some of it imported.

Also I forgot the mention:

HW sponsored by: Vitsch Electronics / VEHosting
2008-04-11 11:30:27 +00:00
Scott Long
b50569b71d Prepare for future integration between CAM and newbus. xpt_bus_register
now takes a device_t to be the parent of the bus that is being created.
Most SIMs have been updated with a reasonable argument, but a few exceptions
just pass NULL for now.  This argument isn't used yet and the newbus
integration likely won't be ready until after 7.0-RELEASE.
2007-06-17 05:55:54 +00:00
Scott Long
ae780f57f6 MPSAFE atapi-cam 2007-05-02 15:30:24 +00:00
Thomas Quinot
057f398585 (atapi_action, case XPT_SCSI_IO): Enable DMA only for READ and WRITE commands
as some combinations of chipset, controller and target do not behave
 correctly when DMA is enabled for other commands.

PR:		kern/103602
MFC after:	2 weeks
2007-04-30 09:33:57 +00:00
Thomas Quinot
e651554bf6 (atapi_cb): Fix test for the presence of sense data. An incorrect condition
was being tested, which would result in a system hang in some configurations.

PR:		kern/112119
Reviewed by:	scottl
MFC after:	3 days
2007-04-30 09:26:43 +00:00
Scott Long
2b83592fdc 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.
2007-04-15 08:49:19 +00:00
Kevin Lo
dc0a8e318e Make it compile 2007-03-14 01:59:00 +00:00
Thomas Quinot
c9b9952154 (atapi_action): Improve error reporting by removing ATA_R_QUIET flag
from ATAPI requests. If CAM debugging is enabled, also mark ATAPI
 requests with ATA_R_DEBUG flag.

(atapi_cb): Report ATAPI timeouts to the CAM layer.
 Fix incorrect debugging traces in the presence of ATAPI errors.

PR:		kern/103602
MFC after:	2 weeks
2007-03-13 20:42:49 +00:00
Thomas Quinot
8810211656 (reinit_bus): When the ATAPI bus is reset, do not schedule an automated
CAM rescan if the ATAPI device entries have not changed.

The ATAPI bus may be reset for a variety of reasons, including any time an
ATAPI request times out. It is not necessary to rescan at the CAM level
in such a case, unless a device has appeared or disappeared, or has
otherwise changed.

PR:		kern/103602
MFC after:	2 weeks
2007-03-13 20:38:16 +00:00
Thomas Quinot
4647ebfc01 (cam_rescan): Do not reference ccb->ccb_h.path in CAM_DEBUG call before
it is initialized; use path instead.

This change fixes a panic when using atapicam in conjunction with CAMDEBUG,
which has been described under kern/103602.

Thanks to Josh Carroll <josh.carroll@gmail.com> for providing the traces
that allowed identifying this problem.

PR:		kern/103602
MFC after:	1 week
2007-02-27 09:00:51 +00:00
Matt Jacob
bd3fd815a7 2nd and final commit that moves us to CAM_NEW_TRAN_CODE
as the default.

Reviewed by multitudes.
2006-11-02 00:54:38 +00:00
Matt Jacob
fa9ed86506 The first of 3 major steps to move the CAM layer forward to using
the CAM_NEW_TRAN_CODE that has been in the tree for some years now.

This first step consists solely of adding to or correcting
CAM_NEW_TRAN_CODE pieces in the kernel source tree such
that a both a GENERIC (at least on i386) and a LINT build
with CAM_NEW_TRAN_CODE as an option will compile correctly
and run (at least with some the h/w I have).

After a short settle time, the other pieces (making
CAM_NEW_TRAN_CODE the default and updating libcam
and camcontrol) will be brought in.

This will be an incompatible change in that the size of structures
related to XPT_PATH_INQ and XPT_{GET,SET}_TRAN_SETTINGS change
in both size and content. However, basic system operation and
basic system utilities work well enough with this change.

Reviewed by:	freebsd-scsi and specific stakeholders
2006-10-31 05:53:29 +00:00
Søren Schmidt
cd8a592bb3 Make the ATAPI sense data accessible when using the ioctl interface
MFC candidate.
2006-03-31 08:09:05 +00:00
Robert Watson
5bb84bc84b Normalize a significant number of kernel malloc type names:
- Prefer '_' to ' ', as it results in more easily parsed results in
  memory monitoring tools such as vmstat.

- Remove punctuation that is incompatible with using memory type names
  as file names, such as '/' characters.

- Disambiguate some collisions by adding subsystem prefixes to some
  memory types.

- Generally prefer lower case to upper case.

- If the same type is defined in multiple architecture directories,
  attempt to use the same name in additional cases.

Not all instances were caught in this change, so more work is required to
finish this conversion.  Similar changes are required for UMA zone names.
2005-10-31 15:41:29 +00:00
Søren Schmidt
6667b30d15 Change the way ioctls are issue to ATA.
The most prominent part is that its now possible to issue ata_requests
directly to say acd0, instead of going through the cumbersome /dev/ata
device.
2005-05-16 13:07:27 +00:00
Søren Schmidt
0068f98f88 Take newbusification one step further, ie use the device_t more consequently
all way through the code down the layers, instead of the mix'n'match that
resulted from the conversion done earlier.

Sponsored by:	pair.com
2005-04-30 16:22:07 +00:00
Søren Schmidt
9f2ea2bcd5 Move the creation of ata_channel child devices to the channel code.
This allows to attach to the children (ATA devices) even without a
driver being attached. This allows atapi-cam to do its work both
with and without the pure ATAPI driver being present.

ATA patches by /me
ATAPI-cam pathes by Thomas
2005-04-15 10:20:52 +00:00
Scott Long
a91e1dfcd5 Explicity make atapi-cam depend on CAM.
Submitted by: Michal Mertl
2005-04-08 22:51:50 +00:00
Scott Long
b149b2d82f Fix a use-after-free problem in atapi_cb(). Add some necessary synchronization
to the XPT_PATH_INQ op.  Don't leak locks on failure in XPT_SCSIIO.  Correctly
fix the CAMDEBUG message.
2005-04-05 15:08:19 +00:00
Poul-Henning Kamp
c339c21b28 Push some faulty debugging aside so LINT compiles. 2005-04-05 09:42:52 +00:00
Scott Long
700a992648 Commit ATAPI-CAM for ATAmkIII. Improvements and changes:
- newbus plumbing.  Each atapicam bus is a child off of a parent ata channel
  bus.  This is somewhat of a hack, but allows the ata core to be completely
  free of atapicam knowledge.
- No more global lists of softc's and no more groping around in internal ata
  structures on each command.
- Giant-free operation of the completion handler.
- Per-bus mutex for protecting the busy list and synchronizing detach.
- Lots of streamlining and dead code elimination, better adherence to the
  CAM locking protocol.

This feature still requires that the appropriate atapi-* driver be present
for each atapi device that you want to talk to (i.e. atapi-cd for cdroms).
It does work both compiled into the kernel and as a loadable module.

Reviewed by: thomas, sos
2005-04-05 02:03:31 +00:00
Brian Feldman
3c632a5847 atapicam(4) is currently off by three orders of magnitude regarding the
timeout values in the CAM CCBs.  Divide by 1000 to get values in seconds
which are what ata(4) timeouts internally use.

This does lose granularity, though, and small values can now round down
to zero.  It's probably worth making all ata(4) timeouts in terms of
hz/ticks/milliseconds/something.
2004-06-17 07:29:56 +00:00
Thomas Quinot
71fe368a83 Use auto-sense data provided by the lowlevel ATA code. 2004-03-04 15:37:39 +00:00
Thomas Quinot
a0e1020523 (atapi_cb): Reenable automatic retrieve of sense data on error, making
it asynchronous to avoid incorrect use of ata_atapicmd within an
 ATAPI callback.

Tested by:	harti
2004-02-11 10:14:08 +00:00
Ruslan Ermilov
bbc712e6ba Fixed a memory leak. 2004-01-18 17:21:15 +00:00
Søren Schmidt
5df3ca789c Use UMA instead of plain malloc for getting ATA request storage.
This gives +10% performance on simple tests, so definitly worth it.
A few percent more could be had by not using M_ZERO'd alloc's, but
we then need to clear fields all over the place to be safe, and
that was deemed not worth the trouble (and it makes life dangerous).
2004-01-14 21:26:35 +00:00
Søren Schmidt
bd234a46da #include sema.h is now required. 2004-01-12 07:16:07 +00:00
Scott Long
21cbd69b19 Fix a potential problem with atapi-cam where an incorrect flag is passed
into the ata queueing layer.

Approved by:	re
2003-12-05 01:02:46 +00:00
Søren Schmidt
1bebf0fbc9 Centralise mode setting. Instead of doing it in all subdrivers, do
it in ata-all.c where it belongs.

Prime controller HW by always setting PIO mode first in attach.
2003-11-11 14:55:36 +00:00
Scott Long
65b5d09597 Free the ata_request struct after we are done using it. This should stop
the memory leak seen when using ATAPICAM.
2003-11-09 20:46:08 +00:00
Thomas Quinot
3fbbaabe4a Enable DMA for ATAPI/CAM input/output operations.
Reviewed by:	scottl
2003-09-24 18:40:10 +00:00
Thomas Quinot
505d8ea4f1 (atapi_cb): Reorganize error handling circuitry.
Fix to the messages output under CAM_DEBUG_CCB: the summary sense
 information (error bits and sense key) is in the error field, not
 in the result field, of struct ata_request. No other functional change.
2003-09-21 16:49:53 +00:00
Thomas Quinot
1a2ede86a0 (atapi_cb): Disable autosense for now as it causes a missed ATA interrupt.
Minor reformatting.
2003-09-21 08:53:05 +00:00
Thomas Quinot
6ff17a79aa (atapi_action): avoid memory leak in a marginal invalid ccb case.
(free_hcb): defend against calling TAILQ_REMOVE on an hcb that was
 not inserted on pending_hcbs.
2003-09-19 16:25:44 +00:00
Thomas Quinot
cc9ed6619f (atapi_action, case XPT_PATH_INQ): Handle properly the case of
CAM_TARGET_WILDCARD (target_id_t is an unsigned integer type).
Fixes boot-time crash on Alpha.

Reviewed by:	roberto
Approved by:	re (murray)
MFC after:	1 week
2003-09-11 17:34:47 +00:00
Thomas Quinot
c8fb1af26c Add missing braces. Fixes boot-time kernel panic with ATAng and ATAPI/CAM.
Reviewed by:	roberto
2003-08-28 03:56:04 +00:00
David E. O'Brien
aad970f1fe Use __FBSDID().
Also some minor style cleanups.
2003-08-24 17:55:58 +00:00
Søren Schmidt
5fdbb0d222 This is a major rework of the ATA driver (ATAng)
Restructure the way ATA/ATAPI commands are processed, use a common
ata_request structure for both. This centralises the way requests
are handled so locking is much easier to handle.

The driver is now layered much more cleanly to seperate the lowlevel
HW access so it can be tailored to specific controllers without touching
the upper layers. This is needed to support some of the newer
semi-intelligent ATA controllers showing up.

The top level drivers (disk, ATAPI devices) are more or less still
the same with just corrections to use the new interface.

Pull ATA out from under Gaint now that locking can be done in a sane way.

Add support for a the National Geode SC1100. Thanks to Soekris engineering
for sponsoring a Soekris 4801 to make this support.

Fixed alot of small bugs in the chipset code for various chips now
we are around in that corner anyways.
2003-08-24 09:22:26 +00:00