This merge is pretty extensive. The conflict is over the new
req->retries parameter, so I had to change the prototype to
scsi_setup_blk_pc_cmnd() and the usage in sd, sr and st.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Patch from Kai minus last sg_segs clearing which was merged already.
> > Was there a oops or lockup or any debug output you can send me? I will try
> > some more large request tests with scsi_debug. You also have to compile your
> > kernel with SCSI_MAX_PHYS_SEGMENTS == 255 to get larger requests now.
>
It was an oops in sgl_unmap_user_pages(). The reason is this:
/* XXX: just for debug. Remove when PageReserved is removed */
BUG_ON(PageReserved(page));
I was using /dev/zero as input and it triggers this. When I used a file as
input, this did not trigger. Should this BUG_ON be removed?
In the same log I noticed that there was another ->sg_segs inconsistency.
Also, the field ->last_SRpnt was not reset when scsi_execute_async()
failed. This caused the error message "Async command already active"
later and prevented proper close.
While doing the changes, I noticed that the current code (since
2.6.0-test4) does not set the pages dirty when reading with direct i/o.
All of these st problems (including the one I sent earlier) are fixed in
the patch at the end of this message. These fixes should probably be
included already in 2.6.15.
After these fixes, the tape seems to operate as expected. Without other
changes, the largest block size with sym53c896 SCSI adapter is 384 kB. The
maximum number of sg segments is set to 96 and clustering is disabled in
the driver. 96 x 4 kB = 384 kB. OK.
I enabled clustering and set max_sectors to 10000 in the SCSI HBA driver.
Now the block size limit is 5000 kB as expected.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
- export __blk_put_request and blk_execute_rq_nowait
needed for async REQ_BLOCK_PC requests
- seperate max_hw_sectors and max_sectors for block/scsi_ioctl.c and
SG_IO bio.c helpers per Jens's last comments. Since block/scsi_ioctl.c SG_IO was
already testing against max_sectors and SCSI-ml was setting max_sectors and
max_hw_sectors to the same value this does not change any scsi SG_IO behavior. It only
prepares ll_rw_blk.c, scsi_ioctl.c and bio.c for when SCSI-ml begins to set
a valid max_hw_sectors for all LLDs. Today if a LLD does not set it
SCSI-ml sets it to a safe default and some LLDs set it to a artificial low
value to overcome memory and feedback issues.
Note: Since we now cap max_sectors to BLK_DEF_MAX_SECTORS, which is 1024,
drivers that used to call blk_queue_max_sectors with a large value of
max_sectors will now see the fs requests capped to BLK_DEF_MAX_SECTORS.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
convert st to always send scatterlists and kill scsi_request
usage.
This is the same as last time as it was posted, but with Kai's patches
merged and we now pass the bytes value to scsi_execute_async.
TODO:
- move DIO code to common place or make block layers usable for ULDs.
- move buffer allocation code to common place for all ULDs to use. And
make buffer allocation code handle all queue limits so we can find
out about problems before calling scsi_execute_async.
- move indirect (copy_to/from_user) paths commone place or make block
layers usable for ULDs.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Convert sg to always send scatterlists, and kill scsi_request usage.
TODO:
- move DIO code to common place or make block layers usable for ULDs.
- move buffer allocation code to common place for all ULDs to use. And
make buffer allocation code obey all queue limits so we can find
out about problems before calling scsi_execute_async. Currently, sg.c
could allocate a buffer that is too large, and send the request
to scsi_execute_async. scsi_execute_async will then check it against
all the queue limits and return a failure in this case. It would nicer
to know about the queue limit violation right away.
- move indirect (copy_to/from_user) paths commone place or make block
layers usable for ULDs.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Add kmemcache of scsi io contexts.
In the future when we finalize on where these functions will live
we can add a mempool for it and do a bioset for out REQ_BLOCK_PC
bios. This is needed becuase the dm-multipath handlers will
want to use the scsi_exectute* functions for failover and we cannot
have them and the bio device allocating from the same mempool.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
sd does not allow scsi_io_completion to retry commands for
SG_IO requests, and it make sense that it should not happen for st
SG_IO commands too. If for st we hit the bottom of scsi_io_completion
we will probably screw things up pretty bad. This patch returns to the
block layer that the whole command completed and relies on the caller to check
the request errors field. For initialization commands like in sd, this adds
the previous behavior where scsi_io_completion did not process the error.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
For tape we need to control the retries. This patch adds a retries
counter on the request for REQ_BLOCK_PC commands originating from
scsi_execute* to use. REQ_BLOCK_PC commands comming from the block
layer SG_IO path continue to use the retires set in the ULD init_command.
(scsi_execute* does not set the gendisk so we do not execute
the init_command in that path).
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Add scsi helpers to create really-large-requests and convert
scsi-ml to scsi_execute_async().
Per Jens's previous comments, I placed this function in scsi_lib.c.
I made it follow all the queue's limits - I think I did at least :), so
I removed the warning on the function header.
I think the scsi_execute_* functions should eventually take a request_queue
and be placed some place where the dm-multipath hw_handler can use them
if that failover code is going to stay in the kernel. That conversion
patch will be sent in another mail though.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Add scsi_add_host() failure handling for aic7xxx
Also silence a compiler warning :
drivers/scsi/aic7xxx/aic7xxx_osm.c: In function `ahc_linux_register_host':
drivers/scsi/aic7xxx/aic7xxx_osm.c:1100: warning: ignoring return value of `scsi_add_host', declared with attribute warn_unused_result
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Add scsi_add_host() failure handling for aic79xx
Also silence a compiler warning :
drivers/scsi/aic7xxx/aic79xx_osm.c: In function `ahd_linux_register_host':
drivers/scsi/aic7xxx/aic79xx_osm.c:1099: warning: ignoring return value of `scsi_add_host', declared with attribute warn_unused_result
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This follows on from Jens' patch and consolidates all of the ULD
separate handlers for REQ_BLOCK_PC into a single call which has his
fix for our direction bug.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Since nobody has offered an explanation for why the sd driver makes a
write-protect check only for devices with removable media, I'm submitting
this patch to get rid of the removable-media test.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
- Add functionality to run in polled mode only. Includes run time
attribute to enable mode.
- Enable runtime writable hba settings for coallescing and delay parameters
Customers have requested a mode in the driver to run strictly polled.
This is generally to support an environment where the server is extremely
loaded and is looking to reclaim some cpu cycles from adapter interrupt
handling.
This patch adds a new "poll" attribute, and the following behavior:
if value is 0 (default):
The driver uses the normal method for i/o completion. It uses the
firmware feature of interrupt coalesing. The firmware allows a
minimum number of i/o completions before an interrupt, or a maximum
time delay between interrupts. By default, the driver sets these
to no delay (disabled) or 1 i/o - meaning coalescing is disabled.
Attributes were provided to change the coalescing values, but it was
a module-load time only and global across all adapters.
This patch allows them to be writable on a per-adapter basis.
if value is 1 :
Interrupts are left enabled, expecting that the user has tuned the
interrupt coalescing values. When this setting is enabled, the driver
will attempt to service completed i/o whenever new i/o is submitted
to the adapter. If the coalescing values are large, and the i/o
generation rate steady, an interrupt will be avoided by servicing
completed i/o prior to the coalescing thresholds kicking in. However,
if the i/o completion load is high enough or i/o generation slow, the
coalescion values will ensure that completed i/o is serviced in a timely
fashion.
if value is 3 :
Turns off FCP i/o interrupts altogether. The coalescing values now have
no effect. A new attribute "poll_tmo" (default 10ms) exists to set
the polling interval for i/o completion. When this setting is enabled,
the driver will attempt to service completed i/o and restart the
interval timer whenever new i/o is submitted. This behavior allows for
servicing of completed i/o sooner than the interval timer, but ensures
that if no i/o is being issued, then the interval timer will kick in
to service the outstanding i/o.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
- Release task management command before counting outstanding commands.
TMF was being erroneously counted as an active outstanding command.
- Serialize EH calls and block requests when EH function is running.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Remove locking wrappers around error handlers. Wrappers were added in
early 2.6.13 api change
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
- Remove unnecessary scsi_block_requests calls on rport deletes.
This was deadlocking the sdev removals as they wanted to flush commands.
- No longer block requests when adding the remote port (to block
discovery). Instead, register, then change port role. Maps to Qlogic
behavior, and closer to the register-node-upon-first-ELS behavior.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Cause: Link bounces were causing discovery ELS's to be killed.
Driver was not properly flushing ELS commands upon the subsequent
link bounces. Thus, processing of ELS post link bounce erroneously
assumed discovery failure and device loss.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Miscellaneous Cleanups:
- Remove ProgType READ_REV mailbox command value check in lpfc_config_port_prep.
- Convert simple printk to an lpfc_printf_log in queuecommand.
- Modify lpfc_abort_handler message 0749 to display more accurate text and data.
- Minor style cleanup: fix 3 long lines in lpfc_hw.h
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Make the vendor, model and rev fields in scsi_device pointers to const
and update a few prototypes of functions using them.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
From Wang Zhenyu:
check header digest for cmd and mgmt tasks
Signed-off-by: Wang Zhenyu <zhenyu.z.wang@intel.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
From Wang Zhenyu:
High queue depth was a problem for some targets so make queue_depth adjustable
From Mike Christie
Make default queue_depth a little lower
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
From Wang Zhenyu:
data digest fix (the bug caused data corruption w/Wasabi StorageBuilder target)
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
from Wang Zhenyu:
Must check SCSI CMD and R2T response according to the spec
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
From tomof@acm.org:
There is one more issue about Equallogic systems. They send
re-direction info with FIN. I think that the kernel module needs to
let iscsid to read data from the socket before killing it.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Must check only valid opcode bits.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Rather than print a list of targets at driver init time, print each
disabled target as we attempt to scan it.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The NVRAM for both Tekram and Symbios boards allows the user to set the
speed and width for individual targets. I took that code out in March
2004 when we introduced Domain Validation, but it seems there's still
a legitimate need for it in some configurations.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
sym_show_msg was almost a duplicate of scsi_print_msg, except not as
featureful. So use the common code instead.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Now that this constant has been added to dma-mapping.h, we don't need our
own definition
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The upper layer doesn't send these down since 2.4.x (or 2.6 in
practice), so no need to handle it. Inline sym_setup_data_pointers
into its only caller so we can fail gracefully in the case we'd get
one neverless.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Allocate the lcb in slave_alloc and free it in slave_destroy. This allows
us to remove all the code that checks to see if it's already been allocated.
From: Christoph Hellwig <hch@lst.de>
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The SYM_OPT_SNIFF_INQUIRY define is never set any more, and the
sym_sniff_inquiry() function doesn't exist
From: Christoph Hellwig <hch@lst.de>
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Transition driver to exclusively use the request_firmware()
interfaces to retrieve firmware-blobs from user-space. This
will be the default behaviour going forward until the
embedded firmware-binary images are removed from the
upstream kernel.
Upon request, the driver caches the firmware image until the
driver is unloaded.
NOTE: The option is present to allow the user to continue to
use the firmware-loader modules, but, should be considered
deprecated.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Rejections fixed up and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
None of the other domain validation messages have a trailing full stop,
so I don't see why this one should.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
patch below marks a few scsi core datastructures as const, so that they end up
in the .rodata section and don't cacheline share with things that get dirtied
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
When kexec booting a kernel when the previous kernel did not
call ipr's shutdown method, the ipr adapter does not get
properly initialized, which can result in the ipr adapter
completing commands issued by the previous kernel. Fix ipr
to detect this scenario by reading the adapter's interrupt
mask register and the microprocessor interrupt register.
If the interrupt mask register indicates that interrupts
are enabled or the reset alert bit is set when the card is
probed, this means the card is in an unknown state and we
hard reset the card.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This patch fixes
- PCI ID overlap issue
- node name changed to 'megaraid_legacy'
I hope this patch addresses concerns brought by Daniel Drake.
Signed-off by: Seokmann Ju <seokmann.ju@enginio.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
When we got a device only capable of async, we would zero out goal->period
which would cause us to try PPR negotiations. Leave goal->period alone,
and check goal->offset before doing PPR. Kudos to Daniel Forsgren for
figuring this out.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Some hardware does not support the PACKET command at all.
Other hardware supports ATAPI, but the driver does something nasty such
as calling BUG() when an ATAPI command is issued.
For these such cases, we mark them with a new flag, ATA_FLAG_NO_ATAPI.
Initial version contributed by Ben Collins.
There is no user of qc->waiting left after ata_exec_internal()
changes. Kill the field.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
There is no user of ata_qc_wait_err() and ata_qc_complete_noop() after
ata_exec_internal() changes. Remove unused functions.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This patch converts all users of libata internal commands to use
ata_exec_internal().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This patch implements ata_exec_internal() function which performs
libata internal command execution. Previously, this was done by each
user by manually initializing a qc, issueing it, waiting for its
completion and handling errors. In addition to obvious code
factoring, using ata_exec_internal() fixes the following bugs.
* qc not freed on issue failure
* ap->qactive clearing could race with the next internal command
* race between timeout handling and irq
* ignoring error condition not represented in tf->status
Also, qc & hardware are not accessed anymore once it's completed,
making internal commands more conformant with general semantics.
ata_exec_internal() also makes it easy to issue internal commands from
multiple threads if that becomes necessary.
This patch only implements ata_exec_internal(). A following patch
will convert all users.
Signed-off-by: Tejun Heo <htejun@gmail.com>
--
Jeff, all patches have been regenerated against upstream branch as of
today. (575ab52a21)
Also, I took out a debug printk from ata_exec_internal (don't know how
that one got left there). Other than that, all patches are identical
to the previous posting.
Thanks. :-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Fix incorrect pointer usage on two calls to kunmap_atomic().
This seems to happen a lot, because kunmap() wants the struct page *,
whereas kunmap_atomic() instead wants the mapped virtual address.
Signed-off-by: Mark Lord <liml@rtr.ca>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
There is a double free in the scsi scan code if a LLDD's slave_alloc()
call fails. There is a direct call to scsi_free_queue and then the
following put_device calls the release function, which also frees the
queue.
Remove the redundant scsi_free_queue.
Signed-off-by: Brian King <brking@us.ibm.com>
Tested-by: Nathan Lynch <ntl@pobox.com>
[ Also removed some strange whitespace artifacts in that area ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ok lets start with the 'easy' stuff. This includes my research and
summary of chip errata into the new driver so that people can refer to
it when updating ata_piix.
No code changes
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Current scsi scanning code appears to have a use after free
bug is a LLDD's slave_alloc fails. Remove the redundant
scsi_free_queue.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This reverts commit 1b0997f561, which in
turn reverted 34ea80ec6a (which is thus
re-instated).
Quoth James Bottomley:
"All it's doing is deferring the device_put() from the
scsi_put_command() to after the scsi_run_queue(), which doesn't fix
the sleep while atomic problem of the device release method. In both
cases we still get the semaphore in atomic context problem which is
caused by scsi_reap_target() doing a device_del(), which I assumed
(wrongly) was valid from atomic context."
who also promised to fix scsi_reap_target().
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The scsi_library routines don't correctly set DMA_NONE when
req->data_len is zero (instead they check the command type first, so
if it's write, we end up with req->data_len == 0 and direction as
DMA_TO_DEVICE which confuses some drivers)
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The eh_action semaphore in scsi_eh_send_command is cleared after a
command timeout. The command is subsequently aborted and the abort
will try to call scsi_done() on it. Unfortunately, the scsi_eh_done()
routine unconditinally completes the semaphore (which is now null).
Fix this race by makiong the scsi_eh_done() routine check that the
semaphore is non null before completing it (mirroring the ordinary
command done/timeout logic).
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The SCSI megaraid drive goes to great effort to kmap
the scatterlist buffer (if used), but then uses the
wrong pointer when copying to it afterward.
Signed-off-by: Mark Lord <lkml@rtr.ca>
Acked by: Ju, Seokmann <Seokmann.Ju@engenio.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Properly check FC_RESID for any non-transfered bytes
regardless of firmware completion status.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
A regression in a recent change
33135aa2a5 caused the driver
to mistakenly drop handling of AENs. Due to the incorrect
handling, ports would not reappear after RSCNs and LIPs.
Drops unused/incorrect compound #define from qla_def.h.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This makes ibmvscsi work correctly with the recent set of kexec
patches that went in. This is based on work by Michael Ellerman, who
chased this initially. He validated that it works during kexec.
Handle kexec correctly in ibmvscsi. During kexec the adapter
will not get cleaned up correctly, so we may need to reset it
to make it sane again.
Signed-off-by: Dave Boutcher <sleddog@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
1. ata_pio_complete():
It seems unnecessary to wait for the clearing of the DRQ bit.
(Waiting for BSY=0 should be enough.
ata_ok() also checks the correctness of the status bits later.)
2. ata_pio_block():
- added error checking, before transfering data.
- minor comments fix
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
- set qc->err_mask directly when we found the error
- remove the code to determine err_mask from device status
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
- move "qc->err_mask |= AC_ERR_ATA_BUS" to where the error is found
- add "assert(qc->err_mask)" to ata_pio_error() to make sure qc->err_mask was available when we enter the error state
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
- remove err_mask from the parameter list of the complete functions
- move err_mask to ata_queued_cmd
- initialize qc->err_mask when needed
- for each function call to ata_qc_complete(), replace the err_mask parameter with qc->err_mask.
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
===============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
- add qc to ata_pio_poll()
- reorder the initialization of qc in ata_pio_complete()
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
===================
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This patch makes ata_scsi_pass_thru() properly set result code and
sense data on translation failures.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This reverts commit 34ea80ec6a.
It does a put_device() from softirq context, which is bad since it gets
a semaphore for reading.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
sg's st_map_user_pages is modelled on an earlier version of st's
sgl_map_user_pages, and has the same bug: if get_user_pages got some but
not all of the pages, then those got were released, but the positive res
code returned implied that they were still to be freed.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Douglas Gilbert <dougg@torque.net>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2.6.15-rc1 made sg's st_unmap_user_pages and st's sgl_unmap_user_pages
BUG on a PageReserved page. But that's wrong: they could be unmapping
the ZERO_PAGE, which is marked PG_reserved; and perhaps others (while
get_user_pages is still permitted on VM_PFNMAP areas - that may change).
More change is needed here: sg claims to dirty even pages written from,
and st claims not to dirty even pages read into; and SetPageDirty is not
adequate for this nowadays. Fixes to those follow in a later patch: for
the moment just fix the 2.6.15 regression.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Nick and I had already been looking at drivers/scsi/{sg.c,st.c},
brought there by __put_page in sg.c's peculiar sg_rb_correct4mmap,
which we'd like to remove. But that's irrelevant to your pain, except...
One extract from the patches I'd like to send Doug and Kai for 2.6.15
or 2.6.16 is this below: since the incomplete get_user_pages path omits
to reset res, but has already released all the pages, it will result in
premature freeing of user pages, and behaviour just like you've seen.
Though I'd have thought incomplete get_user_pages was an exceptional
case, and a bit surprised you'd encounter it. Perhaps there's some
other premature freeing in the driver, and this instance has nothing
whatever to do with it.
If the problem were easily reproducible, it'd be great if you could
try this patch; but I think you've said it's not :-(
Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Enabling these features causes problems with some drives, so disable
them until they're debugged
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Received from Mark Salyzyn.
scsi_bios_ptable return value is not being checked in aac_biosparm.
Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Some SCSI devices apparently get very confused if we try to use the
echo buffer on a non-DT negotiated bus (this mirrors the problems of
using PPR on non-LVD for some devices). The fix is to be far more
conservative about when we use an echo buffer. With this patch, we'll
now see what parameters are negotiated by the read only test, and only
look for an echo buffer if DT is negotiated.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Hi,
the patch below marks several libata (and libata-driver) structures
const so that they end up in the .rodata segment and don't false-share
cachelines with things that get dirtied often.
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This fixes locking in megaraid.c, namely:
(1) make sure megaraid_queue release the adapter lock by changing the
code to have a single return
(2) remove the errornous scsi_assign_lock call
Testing by Burton Windle.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Burton Windle <bwindle@fint.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
To transport scsi reset command to device aic7xxx reset handler looks
at the driver's pending_list and searches any proper command. However
the search condition has been inverted: ahc_match_scb() returns TRUE
if a matched command is found. As a result the reset on required
devices did not turn out well, a correctly working neighbour device
may be surprised by the reset. aic7xxx reset handler reports about the
success, but really the original situation is not corrected yet.
Signed-off-by: Vasily Averin <vvs@sw.ru>
Naturally, there's a corresponding problem in the aic79xx driver, so
I've also added the same fix for that.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
scsi_get_command() attempts to write into a structure that may not have
been successfully allocated. Move this write inside the if statement that
ensures we won't panic the kernel with a NULL pointer dereference.
Signed-off-by: Matthew Dobson <colpatch@us.ibm.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The structure ide_driver_t have a .owner field which is a duplicate
of .gendriver.owner field (.gen_driver is a struct device_driver).
This patch removes ide_driver_t's owner field.
Signed-off-by: Laurent Riffard <laurent.riffard@free.fr>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
sil24_error_intr logs all error interrupts. ATAPI devices generates
many harmless errors which can be ignored and all serious ones are
reported via sense data by SCSI layer. Don't log device errors from
ATAPI devices.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This patch implements ATAPI support for sil24 and bumps driver version
to 0.23.
Signed-off-by: Tejun Heo <htejun@gmail.com>
--
Jeff, it has been converted to use ->dev_config as pointed out.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
There seems to be no way to obtain device signature from sil24 after
SATA phy reset and SRST is needed anyway for later port multiplier
suppport. This patch converts sil24_phy_reset to use SRST instaed.
Signed-off-by: Tejun Heo <htejun@gmail.com>
--
Jeff, I didn't remove the 10ms sleep just to be on the safe side. I
think we can live with 10ms sleep on SRST.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
When an error condition is raised by device via D2H FIS or SDB. sil24
controller should be restarted by setting PORT_CS_INIT and waiting
until PORT_CS_RDY is asserted instead of resetting the controller.
This patch implements sil24_restart_controller for those cases. This
patch also makes sure that PORT_CS_RDY is asserted on
sil24_reset_controller completion.
Signed-off-by: Tejun Heo <htejun@gmail.com>
--
Jeff, delay is reduced to 1us and cnt increased to 10k. My sil3124
turns on PORT_CS_RDY on the second iteration even without any delay.
I think 10k * 1us should be more than enough.
I tried to convert both restart and reset to use msleep's with work
queue, but if we do that, host_set lock should be released after
initiating restart or reset, leading to race condition among
reset/restart, other interrupts and timeout. Implementing
synchronization among those in low-level driver doesn't seem right.
Well, reduced timeout should work for the time being.
Thanks.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Handle errata (it was unintentional on this h/w, whereas its intentional
on others) whereby the nIEN bit in Device Control is ignored, leading to
a situation where a hardware interrupt completes the qc before the
polling code has a chance to.
This will get fixed The Right Way(tm) once Albert Lee's irq-pio
branch is merged, as the more natural PIO method on this hardware is
interrupt-driven.
- DMA boundary was being handled incorrectly. Copied the code from
ata_fill_sg(), since Marvell has the same DMA boundary needs.
(we can't use ata_fill_sg directly since we have different hardware
descriptors)
- cleaned up the SATA phy reset code, to deal with various errata
ATA devices don't generate many errors, so the preferred method is to
printk() when they occur.
ATAPI devices generate tons of exceptions during the normal course
of operation, so this change skips logging the most common class of
errors.
The following code segment is not functional because the transfer cycle time speficied by
the EIDE device is later overwritten by ata_timing_quantize():
/*
* If the drive is an EIDE drive, it can tell us it needs extended
* PIO/MW_DMA cycle timing.
*/
if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
memset(&p, 0, sizeof(p));
(snip)
ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
<== uninitialized "t" is used here
}
/*
* Convert the timing to bus clock counts.
*/
ata_timing_quantize(s, t, T, UT); <== t is overwritten by quantized s
The patch has been submitted for ide-timing.h before:
http://marc.theaimsgroup.com/?l=linux-ide&m=110820013425454&w=2
Resubmitted for libata.
Changes:
- Minor fix to honor the following transfer cycle time speficied by the device
- id[65]: Minimum Multiword DMA transfer cycle time per word
- id[67]: Minimum PIO transfer cycle time without flow control
- id[68]: Minimum PIO transfer cycle time with IORDY
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
=======
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Adds constants for ATAPI support to sata_sil24. This patch is
originally from Jeff Garzik <jgarzik@pobox.com>.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
- Fix a regression in command completion, which prevented
the restart of the DMA engine after the device throws
an error.
- Pack more hardware info into the port-reset error message.
- Promote "welcome to our timeout" message from debug msg
to normal printk.
- Move ATAPI check-condition handling out of the timeout handler
- Use multi-qc-issue feature to issue REQUEST SENSE ATAPI PACKET
command upon receiving an ATAPI check-condition.
This cleans things up a lot, and eliminates a nasty recursion bug.
- in ata_dev_identify(), don't assume that all devices are either
ATA or ATAPI. In the future, this code will see port multipliers
and other devices.
- make a debugging printk less verbose
- add new helper ata_qc_reinit()
- add new helper BPRINTK() and port flag ATA_FLAG_DEBUGMSG, for
fine-grained debugging use.
The ATAPI pad-to-next-32bit-boundary code modifies the scatterlist's
length variable, sometimes to zero. x86-64 platform would oops if a
zero-length scatterlist entry was asked to be mapped. Work around this
by ensuring that we never DMA-map a zero length buffer or SG entry.
Needed to get ATAPI working.
- dump hardware error bits, if hardware signals an error
- only reset hardware during timeout if a command was active
- call ata_qc_complete() with a fine-grained error mask.
Needed so that atapi_qc_complete() can distinguish between
device errors and other errors.
sil24_port_stop() is missing call to ata_pad_free() thus leaking pad
buffer when a port is stopped. This patch adds it.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Although according to the documentation this largely only affects
desktop LED control, let's make sure we set the ATAPI bit when we
have an ATAPI device attached to the port.
scsi_wait_req does not exist any more in the SCSI layer. This patch
makes it so libata can compile again.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This will let me chop the code size of several drivers right down. In
many cases the actual private data is very useful and constant for a
given host controller so being able to just pass it at probe time would
be very useful indeed (eg with the via driver would could pass the udma
clocking and reduce the code size, or with the AMD one the UDMA
multiplier and the offset)
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Current upstream 'allmodconfig' build is broken. This is the obvious
patch...
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch started life as a response to fedora specific ide subsystem changes
that made error handling of my ATAPI tape drive fail; the specifics are in
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=160868
The insertion of the statement rq->errors = err; near the end of
ide_end_drive_cmd() in drivers/ide/ide-io.c means that rq->errors does not
contain what it needs to in idescsi_end_request() in drivers/scsi/ide-scsi.c
anymore. Recent mainline kernels now also have this change.
The patch below makes ide-scsi whole.
Signed-off-by: Willem Riede <wrlk@riede.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
A driver must wait 100us before attempting an MMIO operation
to the RISC after a soft-reset has been initiated. A
similar delay was needed with earlier ISPs.
Note: a PCI config-space read is used to flush the MMIO
write to the ISP, since the ISP's state machines are unable
to respond to any MMIO read during the reset process.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Correct issue where abort I/O command was not being issued
when the loop-state was down.
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
When mulitple initiators are coming up in an FCAL topology.
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
On MMIO relaxed-order platforms, it is possible for the
proper delay during NVRAM access to begin before the request
passes through the PCI bus (via a MMIO write) to the ISP.
Thus, causing a subsequent read to the NVRAM part to fail.
Add a MMIO read, after the MMIO write to insure any posted
writes are flushed.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Received from Mark Salyzyn.
The return data from a read capacity 16 needs to have RTO_EN and PROT_EN
zeroed out.
Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This patch removes almost all inclusions of linux/version.h. The 3
#defines are unused in most of the touched files.
A few drivers use the simple KERNEL_VERSION(a,b,c) macro, which is
unfortunatly in linux/version.h.
There are also lots of #ifdef for long obsolete kernels, this was not
touched. In a few places, the linux/version.h include was move to where
the LINUX_VERSION_CODE was used.
quilt vi `find * -type f -name "*.[ch]"|xargs grep -El '(UTS_RELEASE|LINUX_VERSION_CODE|KERNEL_VERSION|linux/version.h)'|grep -Ev '(/(boot|coda|drm)/|~$)'`
search pattern:
/UTS_RELEASE\|LINUX_VERSION_CODE\|KERNEL_VERSION\|linux\/\(utsname\|version\).h
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
sd_issue_flush() is called from atomic context so we can't use the
semaphore based routines to get a reference to the scsi_disk. Assume
something else already got the reference so we can safely use it.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
- if condition fix for ata_dev_identify()
- ata_pio_poll() minor cleanup.
Changes:
- Use (dev->class == ATA_DEV_ATA) for ata_dev_identify()
since "qc->tf.command" has been overwritten by the device status
- Use HSM_ST_TMOUT directly in ata_pio_poll()
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
The problem is that scsi_run_queue is called from scsi_next_command()
after doing a scsi_put_command. If the command was the only thing
holding the reference on the scsi_device then the resulting device put
will tear down the block queue. Fix this by taking a reference to the
device and holding it around scsi_run_queue()
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This is the drivers/scsi/ part of the big kfree cleanup patch.
Remove pointless checks for NULL prior to calling kfree() in drivers/scsi/.
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Acked-by: Kai Makisara <kai.makisara@kolumbus.fi>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Use schedule_timeout_uninterruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Fix more include file problems that surfaced since I submitted the previous
fix-missing-includes.patch. This should now allow not to include sched.h
from module.h, which is done by a followup patch.
Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Some new ipr adapters do not support some of the initialization
commands currently sent to it from the driver. Handle these
commands failing and continue on with the adapter initialization.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Increase device scanning limits so that all devices are found.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Support now exists in some ipr adapters to issue a device reset
to an Advanced Function disk.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
New ipr adapters support a new device queueing model in the
adapter firmware. The queueing model is the NACA queueing model,
but it does not mean use of NACA is required. The new model removes
some of the adapter firmware queue state that made handling QERR=0
almost impossible. The queueing model on older adapters included the
concept of a queue frozen state, which would freeze the response
queue in the adapter when a check condition occurred, requiring a
a primitive to resume the queue. The new queueing model removes this
complexity.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Handle some new types of ipr errors that can be returned by the adapter.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Some newer ipr adapters are capable of returning autosense from
devices that support it. This patch adds the data structures for
the autosense buffer.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Some ipr adapters will automatically create single device
RAID 0 arrays for all unconfigured RAID capable devices found
at adapter initialization time. This patch adds a module parameter
to disable this behavior.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Some IPR RAID adapter will automatically create single device RAID arrays
for all attached devices when the card is initialized. Setting the
RUNTIME_RESET doorbell bit will prevent this from occurring, since we
only want this behavior the first time the card is initialized and not
each time the card happens to get reset.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Add support for handling some new errors that may be returned
by ipr adapters.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
If an ipr adapter repeatedly fails its initialization
the ipr driver will take the adapter offline and never talk
to it again. This provides a method for the user to manually
try the initialization again through sysfs.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Make some compile time debugging options runtime module options.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
If the write buffer command that is issued to the ipr adapter
to update its microcode fails for some reason, the DMA buffer
will never get unmapped. Move the pci_map/unmap out of the
IOA reset job so that the buffer is always clearly mapped
and unmapped.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Convert appropriate kmalloc/memset calls to use kzalloc.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Adds a scsi_host sysfs attribute and module parm to enable/disable
the write cache on an ipr adapter.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Optimize ipr's slave_alloc to return -ENXIO for devices that
do not exist.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Set the no_uld_attach for devices ipr does not want
upper layer drivers to attach to. These devices are
only reported for RAID management and only sg should
be used to talk to them.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Fix ipr to include all disks in the supported device list,
not just disks formatted to advanced function format.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Simplify error logging path, sanitize error length returned
by the adapter.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Better handle errors received which are not known to the device driver.
Just dump the hex data so that we have a hope of figuring out what
went wrong.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The generic ipr adapter error log currently logs 2 lines of useless
data. Delete these lines.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Adds a macro in the ipr driver for logging a physical device location.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Simplify the ipr error structures a bit by removing some duplication.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
IPR RAID arrays show up on a virtual scsi bus, with a scsi bus number
of 255, which is generated by the adapter microcode. For the initial
scan of the host, we manually scan this bus since it does not obey
SAM in regards to sparse LUNs and the disk array devices do not have
a consistent product id to use scsi core's blacklist. If /proc/scsi/scsi
or sysfs is used to delete one of these devices, the device will not
be able to get added back by rescanning the host since scsi core
will see ipr's max_channel as 4, rather than 255. Update max_channel
after the initial scan so that ipr raid arrays can get re-added
if they get deleted.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
The SCSI qlogicisp driver is both marked BROKEN and superseded by the
qla1280 driver.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
just take the internal lock in queuecommand instead. also switch
the only direct use of the internal lock to the wrappers used elsewhere.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
just take the internal lock in queuecommand instead. also switch
the only direct use of the internal lock to the wrappers used elsewhere.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
just take the adapter lock in megaraid_queue. Additional benefit is
that we can get rid of the awkward conditional locking in
mega_internal_command.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
also remove the adapter->host_lock alias for adapter->lock and remove
some superflous locking aswell as removing the tiny locking wrappers
for the EH routines.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
recent kernels call the eh_ methods without the host lock held.
megaraid_sas doesn't need it but drops it before calling a sleeping
routine and reqcquires it afterwards. Just remove the
spin_unlock/spin_lock calls.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
scsi_send_eh_cmnd currently uses a semaphore and an overload of eh_timer
to either get a completion for a command for a timeout.
Switch to using a completion and wait_for_completion_timeout to simply
the code and not having to deal with the races ourselves.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This function has been superceeded by the block request based interfaces
and is unused (except for the uncompilable cpqfc driver).
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
now that the abuse in qla2xxx is gone this field can be remove.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
adjust comments, remove a useless cast and remove a write-only variable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This patch started life as a response to fedora specific ide subsystem changes
that made error handling of my ATAPI tape drive fail; the specifics are in
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=160868
The insertion of the statement rq->errors = err; near the end of
ide_end_drive_cmd() in drivers/ide/ide-io.c means that rq->errors does not
contain what it needs to in idescsi_end_request() in drivers/scsi/ide-scsi.c
anymore. Recent mainline kernels now also have this change.
Signed-off-by: Willem Riede <wrlk@riede.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
IBM has finally agreed that the "Version Matching" between firmware and
drivers ( and the resulting warning messages ) is no longer necessary.
This patch will remove those functions from the ServeRAID driver.
Signed-off-by: Jack Hammer <jack_hammer@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
- Update raid class to use nested classes for raid components (this will
allow us to move to a component control model now)
- Make the raid level an enumeration rather than and int.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
There's an oops that sometimes shows up with SCSI transport classes in
sysfs_hash_and_remove. The problem is that now, because of the class to
device and vice versa symlinks, all classes have to be removed from
visibility *before* the device is removed from visibility.
The transport class trigger points violate this, so bring them back into
conformance.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Currently the driver takes a reference only for requests coming by way
of the gendisk, not for requests coming by way of the struct device or
struct scsi_device. Such requests can arrive in the rescan, flush,
and shutdown pathways.
The patch also makes the scsi_disk keep a reference to the underlying
scsi_device, and it erases the scsi_device's pointer to the scsi_disk
when the scsi_device is removed (since the pointer should no longer be
used).
This resolves Bugzilla entry #5237.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Use ata_pad_{alloc,free} in two drivers, to factor out common code.
Add ata_pad_{alloc,free} to two other drivers, which needed the padding
but had not been updated.
If I/O is active on the adapter, and an unexpected interrupt is pending
during initialization, the driver blows it's brains out. Since the driver
didn't initiate the I/O, the data in it's internal tables will contain NULL
pointers.
When this condition is detected, a "flush cache and reset" is performed.
The flush cache allows any pending "lazy writes" that the adapter is
processing to complete ( a "must have" for a RAID adapter ) and the reset
puts the adapter back into a known, good state.
Signed-off-by: Jack Hammer <jack_hammer@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Jeff Garzik <jgarzik@pobox.com> points out that this was wrong: we need to
disable local interrupts while holding KM_IRQ0 due to IRQ sharing.
And holding interrupts off during a big PIO opration is expensive, so we only
want to do that if we know the page was highmem.
So revert commit 17fd47ab4d
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
A lot of power packed into a little patch.
This change eliminates the sharing between our controller-wide spinlock
and the SCSI core's Scsi_Host lock. As the locking in libata was
already highly compartmentalized, always referencing our own lock, and
never scsi_host::host_lock.
As a side effect, this change eliminates a deadlock from calling
scsi_finish_command() while inside our spinlock.
Integrate ata_exec() and ata_tf_to_host() into their only caller,
ata_bus_edd().
Rename ata_tf_to_host_nolock() to ata_tf_to_host().
This makes locking a bit easier to review, and may help pave the way for
future changes.
I recently picked up my older work to remove unnecessary #includes of
sched.h, starting from a patch by Dave Jones to not include sched.h
from module.h. This reduces the number of indirect includes of sched.h
by ~300. Another ~400 pointless direct includes can be removed after
this disentangling (patch to follow later).
However, quite a few indirect includes need to be fixed up for this.
In order to feed the patches through -mm with as little disturbance as
possible, I've split out the fixes I accumulated up to now (complete for
i386 and x86_64, more archs to follow later) and post them before the real
patch. This way this large part of the patch is kept simple with only
adding #includes, and all hunks are independent of each other. So if any
hunk rejects or gets in the way of other patches, just drop it. My scripts
will pick it up again in the next round.
Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
(akpm: I don't do typo patches, but one of these is in a printk string)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
It's not necessary to test PageHighmem in here - kmap_atomic() does the right
thing.
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
ata_pci_init_one() receives an array of struct ata_port_info. Recent
updates to the code had always obtained port information from
array element 0, rather than array element N.
Change to avoid hardcoding port_info[0], thereby restoring proper
hardware information to secondary legacy ports.
The second argument to ata_qc_complete() was being used for two
purposes: communicate the ATA Status register to the completion
function, and indicate an error. On legacy PCI IDE hardware, the latter
is often implicit in the former. On more modern hardware, the driver
often completely emulated a Status register value, passing ATA_ERR as an
indication that something went wrong.
Now that previous code changes have eliminated the need to use drv_stat
arg to communicate the ATA Status register value, we can convert it to a
mask of possible error classes.
This will lead to more flexible error handling in the future.
Remove PageReserved() calls from core code by tightening VM_RESERVED
handling in mm/ to cover PageReserved functionality.
PageReserved special casing is removed from get_page and put_page.
All setting and clearing of PageReserved is retained, and it is now flagged
in the page_alloc checks to help ensure we don't introduce any refcount
based freeing of Reserved pages.
MAP_PRIVATE, PROT_WRITE of VM_RESERVED regions is tentatively being
deprecated. We never completely handled it correctly anyway, and is be
reintroduced in future if required (Hugh has a proof of concept).
Once PageReserved() calls are removed from kernel/power/swsusp.c, and all
arch/ and driver code, the Set and Clear calls, and the PG_reserved bit can
be trivially removed.
Last real user of PageReserved is swsusp, which uses PageReserved to
determine whether a struct page points to valid memory or not. This still
needs to be addressed (a generic page_is_ram() should work).
A last caveat: the ZERO_PAGE is now refcounted and managed with rmap (and
thus mapcounted and count towards shared rss). These writes to the struct
page could cause excessive cacheline bouncing on big systems. There are a
number of ways this could be addressed if it is an issue.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Refcount bug fix for filemap_xip.c
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch uses sg_set_buf/sg_init_one in some places where it was
duplicated.
Signed-off-by: David Hardeman <david@2gen.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Greg KH <greg@kroah.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
