Commit Graph

37 Commits

Author SHA1 Message Date
Matthew D Fleming
370808da5f Fix clang warning on empty statement.
Reviewed by:    rdivacky, zml
Approved by:    zml (mentor)
2010-07-28 16:24:11 +00:00
Scott Long
64c71632bf Move the CAM passthrough code into a true module so that it doesn't have to be
compiled into the main AMR driver.  It's code that is nice to have but not
required for normal operation, and it is reported to cause problems for some
people.
2008-11-03 00:53:54 +00:00
Scott Long
74018414bf Many improvements that have been collected over time:
- Improve error handling for load operations.
- Fix a memory corruption bug when using certain linux management apps.
- Allocate all commands up front to avoid OOM deadlocks later on.
2008-01-24 07:26:53 +00:00
Scott Long
281017a577 Rewrite the DMA code paths from being an impenitrable maze of special cases
to a much saner and simplier unified code path.  Along the way, fix various
CAM nits and bugs so that the passthrough works correctly for all cases.
2007-12-12 05:55:03 +00:00
Doug Ambrisko
d279e43442 Make amr_linux work as a module by avoiding calling amr_linux_ioctl_int
from the amr_linux.  This simplifies the amr_linux shim and puts the
smarts into amr.c.

I tested this with 2 amr controllers in one box.  It seems to work
okay with them.
2006-05-03 16:45:15 +00:00
Scott Long
dce223cfb6 After further review and discussion, partially revert the previous commit.
The real problem was that ioctl handlers needed to call amr_wait_command()
with the list lock held.  This not only solves the completion race, it also
prevents bounce buffer corruption that could arise from amr_start() being
called without the proper locks held.

Discussed with: ps
MFC After: 3 days
2006-04-08 05:08:17 +00:00
Paul Saab
026d2aa333 Close a pesky race where after checking the BUSY flag in amr_wait_command,
the completion of the command can occur before tsleep is called and
the command ends up blocking forever since the wakeup has already
been called.

Submitted by:   ups
2006-04-08 02:23:27 +00:00
Paul Saab
447c943f68 - Move the command setup from amr_start1 into the card specific submit
routines.
- Add or replace cpu_spinwait() with DELAY(1) to a few of the busy
  loops when reading from the controller to work around firmware bugs
  which can crash the controller.
2006-02-02 17:50:59 +00:00
Scott Long
5351742ea2 Mega update to the LSI MegaRAID driver:
1.  Implement a large set of ioctl shims so that the Linux management apps
from LSI will work.  This includes infrastructure to support adding, deleting
and rescanning arrays at runtime.  This is based on work from Doug Ambrosko,
heavily augmented by LSI and Yahoo.

2.  Implement full 64-bit DMA support.  Systems with more than 4GB of RAM
can now operate without the cost of bounce buffers.  Cards that cannot do
64-bit DMA will automatically revert to using bounce buffers.  This option
can be forced off by setting the 'hw.amr.force_sg32" tunable in the loader.
It should only be turned off for debugging purposes.  This work was sponsored
by Yahoo.

3.  Streamline the command delivery and interrupt handler paths after
much discussion with Dell and LSI.  The logic now closely matches the
intended design, making it both more robust and much faster.  Certain
i/o failures under heavy load should be fixed with this.

4.  Optimize the locking.  In the interrupt handler, the card can be checked
for completed commands without any locks held, due to the handler being
implicitely serialized and there being no need to look at any shared data.
Only grab the lock to return the command structure to the free pool.  A
small optimization can still be made to collect all of the completions
together and then free them together under a single lock.

Items 3 and 4 significantly increase the performance of the driver.  On an
LSI 320-2X card, transactions per second went from 13,000 to 31,000 in my
testing with these changes.  However, these changes are still fairly
experimental and shouldn't be merged to 6.x until there is more testing.

Thanks to Doug Ambrosko, LSI, Dell, and Yahoo for contributing towards
this.
2005-12-14 03:26:49 +00:00
Scott Long
fceb189d65 Remove spl markers from AMR.
MFC After:	3 days
2005-11-06 15:13:42 +00:00
Scott Long
b60359e981 Remove a stale __FreeBSD_version check. 2005-08-07 23:53:00 +00:00
Scott Long
35e050281e Add support for the LSI 320-2E PCI-Express controller. Fix a couple of bugs
in the ioctl handler.  Update the LSI copyrights for these.

Obtained from: LSI, Corp
2005-01-23 23:25:41 +00:00
Scott Long
5b4a781b96 Lock the AMR driver:
- Introduce the amr_io_lock to control access to command queues, bio queues,
  and the hardware.
- Eliminate the taskqueue and do all completion processing in the ithread.
- Assign a static slot number to each command instead of doing a linear
  search for free slots each time a command is needed.
- Modify the interrupt handler to more closely match what Linux does, for
  safety.
2005-01-16 07:34:26 +00:00
Doug White
f7f3c3e1a6 Free the shared devq last since CAM expects it to be there if
xpt_alloc_device() gets called, which can happen during detach in
certain situations. Fixes module unload.

MFC after:	3 days
2005-01-10 02:34:26 +00:00
Scott Long
dc0ff2140b Fix a number of bugs and significantly alter the command execution path to
properly support bounce buffers and resource shortages.  This allows the
driver to work properly and reliably with more than 4GB of RAM.  Of the
three data paths that exist in the driver, (block, CAM, ioctl), the ioctl
path has not been well tested with these changes due to difficulty with
finding an application that uses it that actually works.

Sponsored by: The FreeBSD Foundation and FreeBSD Systems, Inc.
2004-12-05 23:48:17 +00:00
Paul Saab
2673a44621 Use a separate flag when doing a kernel coredump when polling for
completion instead of abusing the interrupt enable flag.
2004-07-01 06:56:10 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Poul-Henning Kamp
0b7ed341e1 Change the disk(9) API in order to make device removal more robust.
Previously the "struct disk" were owned by the device driver and this
gave us problems when the device disappared and the users of that device
were not immediately disappearing.

Now the struct disk is allocate with a new call, disk_alloc() and owned
by geom_disk and just abandonned by the device driver when disk_create()
is called.

Unfortunately, this results in a ton of "s/\./->/" changes to device
drivers.

Since I'm doing the sweep anyway, a couple of other API improvements
have been carried out at the same time:

The Giant awareness flag has been flipped from DISKFLAG_NOGIANT to
DISKFLAG_NEEDSGIANT

A version number have been added to disk_create() so that we can detect,
report and ignore binary drivers with old ABI in the future.

Manual page update to follow shortly.
2004-02-18 21:36:53 +00:00
Paul Saab
6728a38bf2 crashdump support.
Some bits by:	Rajesh Prabhakaran <rajeshpr@lsil.com>
2003-10-10 22:49:40 +00:00
Poul-Henning Kamp
891619a66d Use bioq_flush() to drain a bio queue with a specific error code.
Retain the mistake of not updating the devstat API for now.

Spell bioq_disksort() consistently with the remaining bioq_*().

#include <geom/geom_disk.h> where this is more appropriate.
2003-04-01 15:06:26 +00:00
Poul-Henning Kamp
60794e0478 Centralize the devstat handling for all GEOM disk device drivers
in geom_disk.c.

As a side effect this makes a lot of #include <sys/devicestat.h>
lines not needed and some biofinish() calls can be reduced to
biodone() again.
2003-03-08 08:01:31 +00:00
Poul-Henning Kamp
7d6ddd1027 NO_GEOM cleanup:
Move to new "struct disk *" centered API".

OK'ed by:	emoore
2003-02-24 21:49:27 +00:00
Poul-Henning Kamp
3eb309c55e Use the standard DISKFLAG_OPEN instead of implementing our own.
Use noclose() instead now that our close method is empty.
2003-02-22 10:10:12 +00:00
Eric Moore
d6b32def6c (1) Problem: PANIC when loading/unloading driver
as module. This also fix's issue kern/45713.
Fix - polling was implemented incorrectly for
adapter enquiry and adapter flush.
(2) Problem: PANIC when unloading driver
as module.
Fix - device nodes are not destroyed for amr0,
and amrd* when driver is unloaded
(3) Problem: PANIC from loading driver when
3ware adapter present, error message "Warning
"amrd is usurping twed's bmaj"
Fix - put #idef freebsd version < 500000 for
bmaj -1 -> amrd_cdevsw
(4) Problem: warnings in driver when compiling
with DAMR_DEBUG param enabled in Makefile
Fix - fix the warnings so driver can compile
when -Werror is present in Makefile.

Approved by: jhb
MFC: 7 days
2002-12-11 20:59:46 +00:00
Eric Moore
e8b5e74b61 amr.c,
amr_cam.c,
amrreg.h,
amrvar.h:
- added support for 12/16 byte cdb's, effecting CAM branch only ( non-disk support )

amrreg.h:
- increased number of scatter gather elements from 16 to 26.

amr_pci.c:
- amr_pci_free(), incorrect bus tag meant for 'amr_mailbox_dmat' was being freed

all:
- copyright change requested by scottl

Reviewed by:	ps,scottl
MFC after:	1 week
2002-10-30 22:00:11 +00:00
Eric Moore
1a6b414672 (1) added LSI Logic copyright, and legal line 3 in license, and string
changes for "LSILogic"
(2) enabled non-disk support through CAM interface
(3) HA_INQ (a) enabled tagged queuing (b) disable reset during
	driver loading (b) renamed BSDi string to LSI
(4) disabled detecting disk devices during SCSI INQUIRY
(5) changed dcdb single element sglist to send one entire buffer chunk
(6) nsgelem not set in sglist
(7) ap_data_transfer_length not set for dcdb
(8) changed "struct thread" to "d_thread_t" for compatibliity { xxx_open,
	xxx_close, xxx_ioctl }
(9) miscellaneous compatiblity fixes
(10) bug fix for 0x0409/0x1000 card
(11) added compiling amr_cam.c in sys/conf/files
(12) added compiling amr_cam.c in sys/modules/amr/Makefile

Reviewed by:ps
MFC after:1 week
1 week
2002-10-18 21:29:14 +00:00
Poul-Henning Kamp
f90c382c0c Make FreeBSD "struct disklabel" agnostic, step 311 of 723:
Rename diskerr() to disk_err() for naming consistency.

Drop the by now entirely useless struct disklabel argument.

Add a flag argument for new-line termination.

Fix a couple of printf-format-casts to %j instead of %l.

Correctly print the name of all bio commands.

Move the function from subr_disklabel.c to subr_disk.c,
and from <sys/disklabel.h> to <sys/disk.h>.

Use the new disk_err() throughout, #include <sys/disk.h> as needed.

Bump __FreeBSD_version for the sake of the aac disk drivers #ifdefs.

Remove unused disklabel members of softc for aac, amr and mlx, which seem
to originally have been intended for diskerr() use, but which only rotted
and got Copy&Pasted at least two times to many.

Sponsored by:   DARPA & NAI Labs.
2002-09-20 12:52:03 +00:00
Mike Smith
21550f28f8 Staticise the amr devclass. 2002-01-08 06:47:02 +00:00
David E. O'Brien
6e551fb628 Update to C99, s/__FUNCTION__/__func__/,
also don't use ANSI string concatenation.
2001-12-10 08:09:49 +00:00
Mike Smith
9f1776230d Major update to the AMI MegaRAID driver.
- New support for 40LD firmware found in Series 475 and 471 adapters.
 - Better support for 8LD firmware adapters
 - Ioctl passthrough interface for userland utilities.
 - Improved error handling and queueing.
 - Several bugfixes (including the 'still open' shutdown bug and
   closing some small race conditions).
 - Zone-style command allocator, reducing memory wasted under heavy
   load conditions.
 - CAM interface (disabled and not fully working) for SCSI passthrough
   access to non-disk devices

Thanks to AMI for supplying a pile of new adapters and various other
help in making this happen.
2000-08-30 07:52:50 +00:00
Jake Burkholder
e39756439c Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by:		msmith and others
2000-05-26 02:09:24 +00:00
Jake Burkholder
740a1973a6 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
2000-05-23 20:41:01 +00:00
Poul-Henning Kamp
8177437d85 Complete the bio/buf divorce for all code below devfs::strategy
Exceptions:
        Vinum untouched.  This means that it cannot be compiled.
        Greg Lehey is on the case.

        CCD not converted yet, casts to struct buf (still safe)

        atapi-cd casts to struct buf to examine B_PHYS
2000-04-15 05:54:02 +00:00
Mike Smith
78601fc5f8 Update to latest working version.
- Add periodic status monitoring routine.  Currently just detects
   lost commands, further functionality pending data from AMI.
   Add some new commands states; WEDGED (never coming back) and
   LATE (for when a command that wasmarked as WEDGED comes bacj,

 - Remove a number of redundant efforts to poll the card for completed
   commands.  This is what interrupt handlers are for.

 - Limit the maximum number of outstanding I/O transactions.  It seems
   that some controllers report more than they can really handle,
   and exceding this limit can cause the controller to lock up.

 - Don't use 'wait' mode for anything where the controller might not
   be able to generate interrupts.  (Keep the 'wait' mode though sa it
   will become useful when we start taking userspace commands.

 - Use a similar atomic locking trategy to the Mylex driver to prevent
   some reentrancy problems.

 - Correctly calculate the block count for non-whoile-bloch transfers
   (actually illegal).

 - Use the dsik device's si_drv1 field instead of b_driver1 in the
   buf struct to pass the driver identifier arond.

 - Rewrite amr_start and amr_done() along the lines of the Mylex driver
   in order to improve robustnes.

 - Always force the PCI busmaster bit on.
2000-04-01 00:35:15 +00:00
Mike Smith
9992d96f25 Fix detection of the card-ready-for-command state. Use an ultimate
timeout closer to the 1-second value that AMI use in their Linux
driver, and mark the mailbox structures as volatile so that gcc
doesn't over-optimise access to them.

This should fix the "controller wedged" bug.

Submitted by:	Brian Dean <brdean@unx.sas.com>
2000-03-23 18:33:19 +00:00
Mike Smith
ba2ace5164 Change the queueing model used by the controller to drastically reduce
the time spent at splbio().  We now avoid it unless we are actually
manipulating the command queues themselves.  This doesn't improve
performance noticeably, but should improve concurrency somewhat.
1999-10-26 23:18:57 +00:00
Mike Smith
d5a51e03e7 This is a driver for the AMI MegaRAID family of controllers. It all of
the AMI PCI controllers using the 8LD firmware interface (40LD firmware
will be supported as soon as I have hardware to test with).

These controllers are rebadged by Dell as the PERC, as well as by HP
and possibly other vendors.
1999-10-07 02:23:12 +00:00