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At some point since 2.6.22, the aha152x_cs driver stopped working and
started erring on load with the following messages:
kernel: pcmcia: request for exclusive IRQ could not be fulfilled.
kernel: pcmcia: the driver needs updating to supported shared IRQ lines.
With the following change, the driver works with shared IRQs.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@kernel.org> [2.6.28], [2.6.27], [2.6.26]
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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DIF does not work with 6-byte commands so we previously ignored those
commands when preparing a request. However, DIX does not need
RDPROTECT/WRPROTECT to be set and 6-byte commands are consequently
perfectly valid in host-only mode.
This patch fixes a problem where we would set the wrong DIX operation
when issuing commands to a legacy disk.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Switch tag arrays to u8 to prevent problems on platforms with signed
char.
Reported-by: Tim LaBerge <tim.laberge@Quantum.Com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Add application tag to the output displayed on error.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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patch
commit b60af5b0adf0da24c673598c8d3fb4d4189a15ce
Author: Alan Stern <stern@rowland.harvard.edu>
Date: Mon Nov 3 15:56:47 2008 -0500
[SCSI] simplify scsi_io_completion()
broke DIX error handling. Also, we are now using EILSEQ to indicate
integrity errors to the upper layers (as opposed to regular EIO
failures). This allows filesystems to inspect buffers and decide
whether to retry the I/O. Update scsi_io_completion() accordingly.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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A bug was introduced by
commit b60af5b0adf0da24c673598c8d3fb4d4189a15ce
Author: Alan Stern <stern@rowland.harvard.edu>
Date: Mon Nov 3 15:56:47 2008 -0500
[SCSI] simplify scsi_io_completion()
because the simplification uses scsi_queue_insert(). The problem with
this function is that it expects to be called from the completion path
while the command is still outstanding, so it decrements the device
and host busy counts to do the requeue. The problem is that
scsi_io_completion() is a path executed well after these counts have
*already* been decremented, leading to a double decrement if the
command goes down any error path leading to ACTION_DELAYED_RETRY.
The fix is to allow a private function __scsi_queue_insert() with a
flag to say whether the busy counters should be decremented. This is
made static to scsi_lib.c to discourage other use.
Reported-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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unsigned req->data_len cannot be negative, and fix =-/-= typo
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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warning: ignoring return value of 'request_irq', declared with attribute
warn_unused_result
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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drive ST3450856SS 0003
I increased the delay step by step until loading of mvsas
reliably detected the drive 200 times in sequence. A much better
approach would be to monitor the hardware for some flag which
indicates that port detection has finished, but I do not have any
hardware documentation.
Signed-off-by: Reinhard Nissl <rnissl@gmx.de>
Cc: Ke Wei <kewei@marvell.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Make enlarge_buffer() retry allocation if the previously chosen page
order was too small. Really limit the page order to 6. Return error if
the maximum order is not large enough for the request.
Signed-off-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This integrates st_scsi_kern_execute and st_do_scsi. IOW, it removes
st_scsi_kern_execute. Then st has a single function, st_do_scsi, to
perform SCSI commands.
Signed-off-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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frp_sg_current in struct st_buffer is always zero. We don't need it.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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orig_frp_segs in struct st_buffer is always zero. We don't need it.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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- remove the from_initialization argument, which is always 1. We
always need to use GFP_ATOMIC.
- 'got' valuable is initialized to zero and doesn't change. We don't
need it.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This removes the usage of struct scatterlist completely.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This removes struct st_buff_fragment and use reserved_pages array to
store fragment buffer.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This removes unused buf_to_sg() that the non-dio path used.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This patch converts the dio path (mmap) to use st_scsi_execute. IOW,
it removes scsi_execute_async in the non dio path.
scsi_execute_async has gone! This also remove unused st_sleep_done.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This patch converts the non-dio path (fragment buffer path) to use
st_scsi_execute. IOW, it removes scsi_execute_async in the non-dio
path.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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st_scsi_execute is a helper function to perform SCSI commands
involving data transfer between user and kernel space (st_read and
st_write).
It's the future plan to combine this with st_scsi_kern_execute helper
function.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This adds struct rq_map_data and the array of pointers to store
fragment buffers to struct st_buffer.
This patch doesn't remove st_buf_fragment but the latter patch does.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This patch simiplifies the fragment buffer management a bit, all the
buffers in the fragment list become the same size. This is necessary
to use the block layer API (sg driver was modified in the same way)
since the block layer API takes the same size page frames instead of
scatter gatter.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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The commit 818827669d85b84241696ffef2de485db46b0b5e (block: make
blk_rq_map_user take a NULL user-space buffer) extended
blk_rq_map_user to accept a NULL user-space buffer with a READ
command. It was necessary to convert sg to use the block layer mapping
API.
This patch extends blk_rq_map_user again for a WRITE command. It is
necessary to convert st and osst drivers to use the block layer
apping API.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This fixes bio_copy_user_iov to properly handle the partial mappings
with struct rq_map_data (which only sg uses for now but st and osst
will shortly). It adds the offset member to struct rq_map_data and
changes blk_rq_map_user to update it so that bio_copy_user_iov can add
an appropriate page frame via bio_add_pc_page().
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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In a previous patch to fix an issue with error recovery,
the behavior of the max_requests module paramater was also
changed. If, for some reason, max_requests is set to one by
the user, we will end up with a negative number for can_queue.
Fix this by making max_requests not include the two event structs
needed to do error recovery.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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In each case, if the NULL test is necessary, then the dereference should be
moved below the NULL test.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
type T;
expression E;
identifier i,fld;
statement S;
@@
- T i = E->fld;
+ T i;
... when != E
when != i
if (E == NULL) S
+ i = E->fld;
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: James Smart <James.Smart@Emulex.Com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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The remove() callback in platform drivers should return int in
accordance to the definition of the platform_driver structure.
However, the SGI-specific WD93 SCSI controller driver defines
the callback as a void function, which causes the following
compilation warning:
drivers/scsi/sgiwd93.c:314: warning: initialization from
incompatible pointer type
This patch fixes the warning by changing the return type of
the remove() callback to what the core driver code requires.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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If a link down event is received, outstanding commands may get
returned to the ibmvfc driver with a "transaction cancelled implicit"
response. This is currently translated to DID_ABORT, which does
not get retried by SCSI core, but rather passes the failure up
the stack. This can result in I/O errors at the filesystem level.
Fix up this response a well as a few other error responses.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This patch (as1191) adds a missing "default" case in
scsi_io_completion(), thereby fixing an "uninitialized variable"
error. It also adds a missing newline to a log entry.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Make sure the control flow in scsi_times_out makes sense.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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[jejb: limit ioctl to returning 20 characters to avoid overrun
on long device names and add a few more conversions]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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As planed, this removes ide-scsi.
The 2.6 kernel supports direct writing to ide CD drives, which
eliminates the need for ide-scsi. ide-scsi has been unmaintained and
marked as deprecated.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James.Bottomley@HansenPartnership.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (104 commits)
[SCSI] fcoe: fix configuration problems
[SCSI] cxgb3i: fix select/depend problem
[SCSI] fcoe: fix incorrect use of struct module
[SCSI] cxgb3i: remove use of skb->sp
[SCSI] cxgb3i: Add cxgb3i iSCSI driver.
[SCSI] zfcp: Remove unnecessary warning message
[SCSI] zfcp: Add support for unchained FSF requests
[SCSI] zfcp: Remove busid macro
[SCSI] zfcp: remove DID_DID flag
[SCSI] zfcp: Simplify mask lookups for incoming RSCNs
[SCSI] zfcp: Remove initial device data from zfcp_data
[SCSI] zfcp: fix compile warning
[SCSI] zfcp: Remove adapter list
[SCSI] zfcp: Simplify SBAL allocation to fix sparse warnings
[SCSI] zfcp: register with SCSI layer on ccw registration
[SCSI] zfcp: Fix message line break
[SCSI] qla2xxx: changes in multiq code
[SCSI] eata: fix the data buffer accessors conversion regression
[SCSI] ibmvfc: Improve async event handling
[SCSI] lpfc : correct printk types on PPC compiles
...
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* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (33 commits)
ide-cd: remove dead dsc_overlap setting
ide: push local_irq_{save,restore}() to do_identify()
ide: remove superfluous local_irq_{save,restore}() from ide_dump_status()
ide: move legacy ISA/VLB ports handling to ide-legacy.c (v2)
ide: move Power Management support to ide-pm.c
ide: use ATA_DMA_* defines in ide-dma-sff.c
ide: checkpatch.pl fixes for ide-lib.c
ide: remove inline tags from ide-probe.c
ide: remove redundant code from ide_end_drive_cmd()
ide: struct device - replace bus_id with dev_name(), dev_set_name()
ide: rework handling of serialized ports (v2)
cy82c693: remove superfluous ide_cy82c693 chipset type
trm290: add IDE_HFLAG_TRM290 host flag
ide: add ->max_sectors field to struct ide_port_info
rz1000: apply chipset quirks early (v2)
ide: always set nIEN on idle devices
ide: fix ->quirk_list checking in ide_do_request()
gayle: set IDE_HFLAG_SERIALIZE explictly
cmd64x: set IDE_HFLAG_SERIALIZE explictly for CMD646
ali14xx: doesn't use shared IRQs
...
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fcoe selects libfc and requires SCSI and PCI (the SCSI requirement is
implicitly covered by an enclosing if). Fix them both up so they
cannot be configured in an invalid state: make LIBFC select
SCSI_FC_ATTRS and make FCOE depend on PCI and select LIBFC.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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cxgb3i requires the cxgb3 net driver, so it selects it. However,
cxgb3 has dependencies which the select cannot see. Fix this by
separating out the cxgb3 dependencies into a separate hidden config
option (CONFIG_CHELSIO_T3_DEPENDS) and make both cxgb3 and cxgb3i
depend on it.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This structure may not be defined if CONFIG_MODULE=n, so never deref
it. Change uses of module->name to module_name(module) and corrects
some dyslexic printks and docbook comments.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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The cxgb3i was using skb->sp pointer for some internal book-keeping
which is not related to the secure path. Changed it to use skb->cb[]
instead.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This patch implements the cxgb3i iscsi connection acceleration for the
open-iscsi initiator.
The cxgb3i driver offers the iscsi PDU based offload:
- digest insertion and verification
- payload direct-placement into host memory buffer.
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Now that (almost) all host drivers have been fixed not to abuse ide_lock
and core code usage of ide_lock has been sanitized we may safely replace
ide_lock by per-hwgroup locks.
This patch is partially based on earlier patch from Ravikiran G Thirumalai.
While at it:
- don't use deprecated HWIF() and HWGROUP() macros
- update locking documentation in ide.h
v2:
Add missing spin_lock_init(&hwgroup->lock). (Noticed by Elias Oltmanns)
Cc: Vaibhav V. Nivargi <vaibhav.nivargi@gmail.com>
Cc: Alok N. Kataria <alokk@calsoftinc.com>
Cc: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Cc: Elias Oltmanns <eo@nebensachen.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Following changes have been made:
1. Scan outstanding commands only in the queue where it is submitted
2. Update queue registers directly in the fast path
3. Queue specific BAR is remapped only for multiq capable adapters
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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This fixes the regression introduced by the commit
58e2a02eb18393e76a469580fedf7caec190eb5e (eata: convert to use the
data buffer accessors), reported:
http://marc.info/?t=122987621300006&r=1&w=2
- fix DMA_NONE handling in map_dma()
- this driver can't use scsi_dma_map since host->shost_gendev.parent
is not set properly (it uses scsi_register).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reported-by: Arthur Marsh <arthur.marsh@internode.on.net>
Tested-by: Arthur Marsh <arthur.marsh@internode.on.net>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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While doing various error injection testing, such as cable
pulls and target moves, some issues were observed in handling
these events. This patch improves the way these events are handled
by increasing the delay waiting for the fabric to settle and also
changes the behavior of Link Up to break the CRQ to ensure everything
gets cleaned up properly on the VIOS.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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To fix the following lockdep warning we turn the spin_unlock_irq() into
a spin_unlock() and similarly for the corresponding spin_lock_irq(). We
can do this because there is no need to enable interrupts in this path
(thanks to Bring King for the tip).
Badness at kernel/lockdep.c:2193
NIP: c0000000000855d0 LR: c0000000000855b4 CTR: c0000000000482d0
REGS: c00000000fffb8d0 TRAP: 0700 Not tainted (2.6.28-rc5-autokern1)
MSR: 8000000000021032 <ME,IR,DR> CR: 28000022 XER: 00000004
TASK = c00000000091fa80[0] 'swapper' THREAD: c000000000a3c000 CPU: 0
GPR00: 0000000000000000 c00000000fffbb50 c000000000a3c2e0 0000000000000001
GPR04: 000000000000a580 c0000000003870d4 0000000000000000 0000000000000001
GPR08: 0000000000000000 c00000000112fdf0 c0000000008ed918 c000000000abcfd0
GPR12: 0000000048000088 c000000000a7f300 0000000000000000 0000000002100000
GPR16: c000000000644bd0 c000000000643390 0000000000000000 00000000003d0c00
GPR20: 00000000028372d8 c0000000007372d8 0000000002837548 c000000000737548
GPR24: c000000000644660 00000000028372d8 000000000000001a c000000076760000
GPR28: 0000000000000004 c0000000004e8450 c0000000009aafb0 c00000000091fa80
NIP [c0000000000855d0] .trace_hardirqs_on_caller+0x10c/0x194
LR [c0000000000855b4] .trace_hardirqs_on_caller+0xf0/0x194
Call Trace:
[c00000000fffbb50] [c00000000fffbbe0] 0xc00000000fffbbe0 (unreliable)
[c00000000fffbbe0] [c0000000004e8450] ._spin_unlock_irq+0x38/0x5c
[c00000000fffbc70] [c0000000003870d4] .ipr_ioa_reset_done+0x204/0x284
[c00000000fffbd10] [c00000000037d234] .ipr_reset_ioa_job+0xc4/0xec
[c00000000fffbda0] [c000000000385ce0] .ipr_isr+0x208/0x484
[c00000000fffbe50] [c0000000000aaf3c] .handle_IRQ_event+0x58/0xd4
[c00000000fffbef0] [c0000000000ad978] .handle_fasteoi_irq+0x110/0x1ac
[c00000000fffbf90] [c000000000025214] .call_handle_irq+0x1c/0x2c
[c000000000a3f9a0] [c00000000000d168] .do_IRQ+0x120/0x210
[c000000000a3fa40] [c000000000004804] hardware_interrupt_entry+0x1c/0x98
--- Exception: 501 at .pseries_dedicated_idle_sleep+0xec/0x1cc
LR = .pseries_dedicated_idle_sleep+0xdc/0x1cc
[c000000000a3fd30] [c000000000038208] .pseries_dedicated_idle_sleep+0x74/0x1cc (unreliable)
[c000000000a3fdd0] [c000000000012134] .cpu_idle+0x114/0x1dc
[c000000000a3fe60] [c0000000004ecb18] .rest_init+0x7c/0x94
[c000000000a3fee0] [c000000000700a40] .start_kernel+0x4b8/0x4e0
[c000000000a3ff90] [c000000000008368] .start_here_common+0x1c/0x34
Instruction dump:
e92d01b0 80090894 2f800000 41be002c 481ed1d1 60000000 2fa30000 419e0080
e93e8090 80090000 2f800000 409e0070 <0fe00000> 48000068 7fe3fb78 38800001
Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Pre-emptively terminate i/o on the rport if dev_loss_tmo has fired.
The desire is to terminate everything, so that the i/o is cleaned up
prior to the sdev's being unblocked, thus any outstanding timeouts/aborts
are avoided.
Also, we do this early enough such that the rport's port_id field is
still valid. FCOE libFC code needs this info to find the i/o's to
terminate.
Signed-off-by: James Smart <james.smart@emulex.com>
[michaelc@cs.wisc.edu: remove extra scsi_target_unblock call]
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Following changes have been made.
1. qla_hw_data structure holds an array for request queue pointers,
and an array for response queue pointers.
2. The base request and response queues are created by default.
3. Additional request and response queues are created at the time of vport
creation. If queue resources are exhausted during vport creation, newly
created vports use the default queue.
4. Requests are sent to the request queue that the vport was assigned
in the beginning.
5. Responses are completed on the response queue with which the request queue
is associated with.
[fixup memcpy argument reversal spotted by davej@redhat.com]
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Encapsulation protocol for running Fibre Channel over Ethernet interfaces.
Creates virtual Fibre Channel host adapters using libfc.
This layer is the LLD to the scsi-ml. It allocates the Scsi_Host, utilizes
libfc for Fibre Channel protocol processing and interacts with netdev to
send/receive Ethernet packets.
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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libFC is composed of 4 blocks supported by an exchange manager
and a framing library. The upper 4 layers are fc_lport, fc_disc,
fc_rport and fc_fcp. A LLD that uses libfc could choose to
either use libfc's block, or using the transport template
defined in libfc.h, override one or more blocks with its own
implementation.
The EM (Exchange Manager) manages exhcanges/sequences for all
commands- ELS, CT and FCP.
The framing library frames ELS and CT commands.
The fc_lport block manages the library's representation of the
host's FC enabled ports.
The fc_disc block manages discovery of targets as well as
handling changes that occur in the FC fabric (via. RSCN events).
The fc_rport block manages the library's representation of other
entities in the FC fabric. Currently the library uses this block
for targets, its peer when in point-to-point mode and the
directory server, but can be extended for other entities if
needed.
The fc_fcp block interacts with the scsi-ml and handles all
I/O.
Signed-off-by: Robert Love <robert.w.love@intel.com>
[jejb: added include of delay.h to fix ppc64 compile prob spotted by sfr]
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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