Commit Graph

347 Commits

Author SHA1 Message Date
Ishai Rabinovitz a20f3a6d7e IB/srp: Check match_strdup() return
Checks if the kmalloc in match_strdup() was successful, and bail out
on looking at the token if it failed.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-01-22 17:03:54 -08:00
Roland Dreier bf628dc22a IB/srp: Fix FMR mapping for 32-bit kernels and addresses above 4G
struct srp_device.fmr_page_mask was unsigned long, which means that
the top part of addresses above 4G was being chopped off on 32-bit
architectures.  Of course nothing good happens when data from SRP
targets is DMAed to the wrong place.

Fix this by changing fmr_page_mask to u64, to match the addresses
actually used by IB devices.

Thanks to Brian Cain <Brian.Cain@ge.com> and David McMillen
<davem@systemfabricworks.com> for help diagnosing the bug and testing
the fix.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-15 14:01:49 -08:00
Ralph Campbell 85507bcce0 IB/srp: Use new verbs IB DMA mapping functions
Convert SRP to use the new verbs DMA mapping functions for kernel
verbs consumers.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-12 14:30:55 -08:00
David Howells 4c1ac1b491 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:

	drivers/infiniband/core/iwcm.c
	drivers/net/chelsio/cxgb2.c
	drivers/net/wireless/bcm43xx/bcm43xx_main.c
	drivers/net/wireless/prism54/islpci_eth.c
	drivers/usb/core/hub.h
	drivers/usb/input/hid-core.c
	net/core/netpoll.c

Fix up merge failures with Linus's head and fix new compilation failures.

Signed-Off-By: David Howells <dhowells@redhat.com>
2006-12-05 14:37:56 +00:00
Vu Pham d2fcea7d68 IB/srp: Fix memory leak on reconnect
SRP reallocates the IU buffers for tx_ring and rx_ring without freeing
the old buffers when it reconnects to a target.  Fix this by keeping
the old IU buffers around.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-11-29 15:33:09 -08:00
Arne Redlich 3c8edf0eca IB/srp: Increase supported CDB size
Set the Scsi_Host's max_cmd_len from 12 (default) to 16 for
SRP. Otherwise scsi_dispatch_cmd() won't pass down certain commands
such as READ CAPACITY 16, required for supporting disks > 2TB.

Signed-off-by: Arne Redlich <arne.redlich@xiranet.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-11-29 15:33:06 -08:00
David Howells c4028958b6 WorkStruct: make allyesconfig
Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
2006-11-22 14:57:56 +00:00
Ishai Rabinovitz 01cb9bcbd3 IB/srp: Enable multiple connections to the same target
Enable multiple concurrent connections to the same SRP target:

1) Use port GUID instead of node GUID in the initiator port
   identifier.  This allows connections to be made from multiple HCA
   ports at the same time.
2) Let the user specify the identifier extention when adding the
   device.  This allows userspace to make multiple connections even
   from the same port, if it wants too.

Without this, only one connection can be made from any given HCA, even
if it has multiple ports, because we don't use multi-channel mode, so
targets will only allow one connection from a given initiator port ID.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-10-10 12:49:05 -07:00
Ishai Rabinovitz 9b0af401aa IB/srp: Remove redundant memset()
scsi_host_alloc() already allocates with kzalloc(), so the struct Scsi_Host
is zeroed out, including the private data portion.  Remove the redundant
memset that zeros this out again in the SRP initiator.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-10-10 09:51:14 -07:00
Michael S. Tsirkin c1a0b23bf4 IB/sa: Require SA registration
Require users to register with SA module, to prevent the sa_query
module text from going away while an SA query callback is still
running.  Update all in-tree users for the new interface.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22 15:22:53 -07:00
Tom Tucker 07ebafbaaa RDMA: iWARP Core Changes.
Modifications to the existing rdma header files, core files, drivers,
and ulp files to support iWARP, including:
 - Hook iWARP CM into the build system and use it in rdma_cm.
 - Convert enum ib_node_type to enum rdma_node_type, which includes
   the possibility of RDMA_NODE_RNIC, and update everything for this.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22 15:22:47 -07:00
Roland Dreier 3cd965646b IB: Whitespace fixes
Remove some trailing whitespace that has snuck in despite the best
efforts of whitespace=error-all.  Also fix a few other whitespace
bogosities.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22 15:22:46 -07:00
Ishai Rabinovitz ded7f1a16d IB/srp: Add port/device attributes
Add local_ib_device and local_ib_port attributes to srp scsi_host.
These are needed when we want to connect to the same target through
multiple distinct ports.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22 15:17:21 -07:00
Ishai Rabinovitz add7afc756 IB/srp: Don't schedule reconnect from srp
If there is a problem in the connection, the SCSI mid-layer will
eventually call srp_reset_host(), which will call srp_reconnect(), so
we do not need to schedule a call to srp_reconnect_work() from
srp_completion().

Removing this prevents srp_reset_host() from failing if a reconnect
scheduled from srp_completion() is already in progress, which in turn
was causing crashes as both SCSI midlayer and srp_reconnect() were
cancelling commands.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-14 13:51:40 -07:00
Ishai Rabinovitz 559ce8f150 IB/srp: Work around data corruption bug on Mellanox targets
Data corruption has been seen with Mellanox SRP targets when FMRs
create a memory region with I/O virtual address != 0.  Add a
workaround that disables FMR merging for Mellanox targets (OUI 0002c9).

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-08-03 10:35:43 -07:00
Ishai Rabinovitz d916a8f1b4 IB/srp: Fix crash in srp_reconnect_target
Protect against srp_reset_device() clearing the req_queue while
srp_reconnect_target() is in progress (note that state change at
the top of srp_reconnect_target() is not sufficient for this since
srp_reset_device() ignores the state).

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-08-03 09:44:22 -07:00
Michael S. Tsirkin adfaa888a2 [PATCH] fmr pool: remove unnecessary pointer dereference
ib_fmr_pool_map_phys gets the virtual address by pointer but never writes
there, and users (e.g.  srp) seem to assume this and ignore the value
returned.  This patch cleans up the API to get the VA by value, and updates
all users.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Acked-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-14 21:53:51 -07:00
Vu Pham 6583eb3dcc [PATCH] srp: fix fmr error handling
srp_unmap_data assumes req->fmr is NULL if the request is not mapped, so we
must clean it out in case of an error.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Acked-by: Roland Dreier <rolandd@cisco.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-14 21:53:50 -07:00
Ishai Rabinovitz 526b4caa0a IB/srp: Factor out common request reset code
Misc cleanups in ib_srp:
1) I think that it is more efficient to move the req entries from req_list
   to free_list in srp_reconnect_target (rather than rebuild the free_list).
   (In any case this code is shorter).
2) This allows us to reuse code in srp_reset_device and srp_reconnect_target
   and call a new function srp_reset_req.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:38 -07:00
Ramachandra K 0c0450db31 IB/srp: Support SRP rev. 10 targets
There has been a change in the format of port identifiers between
revision 10 of the SRP specification and the current revision 16A.

Revision 10 specifies port identifier format as

  lower 8 bytes :  GUID   upper 8 bytes :  Extension

Whereas revision 16A specifies it as 

 lower 8 bytes :  Extension  upper 8 bytes :  GUID

There are older targets (e.g. SilverStorm Virtual Fibre Channel
Bridge) which conform to revision 10 of the SRP specification.

The I/O class of revision 10 is 0xFF00 and the I/O class of revision
16A is 0x0100.

For supporting older targets, this patch:

1) Adds a new optional target creation parameter "io_class". Default
   value of io_class is 0x0100 (i.e. revision 16A)
2) Uses the correct port identifier format for targets with IO class
   of 0xFF00 (i.e. conforming to revision 10)

Signed-off-by: Ramachandra K <rkuchimanchi@silverstorm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:38 -07:00
Roland Dreier 6bfa24fa3e IB/srp: Get rid of "Target has req_lim 0" messages
It's perfectly valid for a connection to an SRP target to have a
request limit of 0, so get rid of the message about it, which can spam
kernel logs even with printk_ratelimit().  Keep a count of such events
in a "zero_req_lim" SCSI host attribute instead, so someone who cares
can look at the statistics.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:33 -07:00
Ishai Rabinovitz b7ac4ab497 IB/srp: Handle DREQ events from CM
Handle IB_CM_DREQ_ERROR and IB_CM_DREQ_RECEIVED events from the CM,
instead of just printing "Unhandled CM event".  In the case of
DREQ_ERROR, just ignore the event -- a TIMEWAIT_EXIT will be generated
also.  For DREQ_RECEIVED, send a DREP in response to shut the
connection down cleanly.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:32 -07:00
Vu Pham 74b0a15b5e IB/srp: Allow sg_tablesize to be adjusted
Make the sg_tablesize used by SRP adjustable at module load time via a
module parameter.  Calculate the corresponding IU length required to
support this.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:32 -07:00
Vu Pham 52fb2b50c4 IB/srp: Allow cmd_per_lun to be set per target port
Allow userspace to throttle traffic on a given connection to a target
port by adding "max_cmd_per_lun=xyz" to lower the cmd_per_lun value
set for that scsi_host.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:31 -07:00
Ishai Rabinovitz 0c5b395239 IB/srp: Clean up loop in srp_remove_one()
Interrupts will always be enabled in srp_remove_one(), so
spin_lock_irq() can be used instead of spin_lock_irqsave().
Also, the loop takes target->scsi_host->host_lock, so target->state
can just be set to SRP_TARGET_REMOVED witout testing the old value.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:31 -07:00
Matthew Wilcox b3589fd490 IB/srp: Change target_mutex to a spinlock
The SRP driver never sleeps while holding target_mutex, and it's just
used to protect some simple list operations, so hold times will be
short.  So just convert it to a spinlock, which is smaller and faster.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:30 -07:00
Matthew Wilcox 549c5fc2c8 IB/srp: Get rid of unneeded use of list_for_each_entry_safe()
list_for_each_entry_safe() is used in one place where the list isn't
modified.  So just change it to list_for_each_entry().

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:30 -07:00
Matthew Wilcox 1962a4a1e4 IB/srp: Use SCAN_WILD_CARD from SCSI headers
SCAN_WILD_CARD is indeed available from <scsi/scsi.h>, which is
already included.  So get rid of private hack.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:30 -07:00
Roland Dreier f5358a172f IB/srp: Use FMRs to map gather/scatter lists
Create an SRP FMR pool on HCAs that support FMRs, and use FMRs to map
gather/scatter lists that have more than one entry into a single
memory region that appears virtually contiguous to the SRP target
(which is the RDMA initiator).

This patch bails out on FMR mapping for SCSI commands where the
gather/scatter list cannot be mapped into a single FMR because there
are sub-page-sized entries in middle of the list.  An unaligned
start or end of the list is OK.

Based on a patch by Vu Pham <vuhuong@mellanox.com>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17 20:37:29 -07:00
Ishai Rabinovitz 093beac189 IB/srp: Complete correct SCSI commands on device reset
When flushing out queued commands after a successful device reset,
make sure that SRP completes the right commands, instead of calling
scsi_done on the command passed into the device reset handler over and
over.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-05-17 09:20:48 -07:00
Roland Dreier ec2d720849 IB/srp: Get rid of extra scsi_host_put()s if reconnection fails
If a reconnection attempt fails, then SRP does two scsi_host_put()s.
This is a historical relic from an earlier version of the driver that
took a reference on the scsi_host before trying to reconnect, so get
rid of the extra scsi_host_put().

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-05-17 09:16:03 -07:00
Roland Dreier e65810566f IB/srp: Don't wait for disconnection if sending DREQ fails
Sending a DREQ may fail, for example because the remote target has
already broken the connection.  If so, then SRP should not wait for
the disconnection to complete, because it never will.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-05-17 09:13:21 -07:00
Roland Dreier d945e1df28 IB/srp: Fix tracking of pending requests during error handling
If a SCSI abort completes, or the command completes successfully, then
the driver must remove the command from its queue of pending
commands.  Similarly, if a device reset succeeds, then all commands
queued for the given device must be removed from the queue.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-05-09 10:50:28 -07:00
Roland Dreier f80887d0b9 IB/srp: Remove request from list when SCSI abort succeeds
If a SCSI abort succeeds, then the aborted request should to be
removed from the list of pending requests.  This fixes list corruption
after an abort occurs.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-04-19 11:40:10 -07:00
Roland Dreier ce1823f032 IB/srp: Fix memory leak in options parsing
Fix memory leak if parsing destination GID fails.

Coverity bug 1042

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-04-03 09:31:04 -07:00
Roland Dreier 3f89f83449 IB/srp: Fix unmapping of fake scatterlist
The recently merged patch to create a fake scatterlist for non-SG SCSI
commands had a bug: the driver ended up doing dma_unmap_sg() on a
scatterlist scmnd->request_buffer rather than the fake scatter list it
created.  Fix this so that the driver unmaps the same thing it maps.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-29 09:36:45 -08:00
Roland Dreier cf368713a3 IB/srp: Use a fake scatterlist for non-SG SCSI commands
Since the SCSI midlayer is moving towards entirely getting rid of
commands with use_sg == 0, we should treat this case as an exception.
Therefore, change the IB SRP initiator to create a fake scatterlist
for these commands with sg_init_one().  This simplifies the flow of
DMA mapping and unmapping, since SRP can just use dma_map_sg() and
dma_unmap_sg() unconditionally, rather than having to choose between
the dma_{map,unmap}_sg() and dma_{map,unmap}_single() variants.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-24 15:47:26 -08:00
Roland Dreier bf17c1c7cc IB/srp: Coverity fix to srp_parse_options()
Fix leak found by Coverity: in the SRP_OPT_DGID case,
srp_parse_options() didn't free the result of match_strdup().

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20 10:08:25 -08:00
Roland Dreier 6ecb0c8496 IB/srp: Add SCSI host attributes to show target port
Add SCSI host attributes in sysfs that show the ID extension, IOC
GUID, service ID, P_Key and destination GID for each target port that
the SRP initiator connects to.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20 10:08:23 -08:00
Roland Dreier 1285b3a0b0 IB/srp: Don't send task management commands after target removal
Just fail abort and reset requests that come in after we've already
decided to remove a target.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-03 17:50:16 -08:00
Ingo Molnar 8e9e5f4f5e IB/srp: Semaphore to mutex conversion
Convert srp_host->target_mutex from a semaphore to a mutex.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-01-30 15:21:21 -08:00
Sean Hefty cf311cd49a IB: Add node_guid to struct ib_device
Add a node_guid field to struct ib_device.  It is the responsibility
of the low-level driver to initialize this field before registering a
device with the midlayer.  Convert everyone to looking at this field
instead of calling ib_query_device() when all they want is the node
GUID, and remove the node_guid field from struct ib_device_attr.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-01-10 07:39:34 -08:00
Tim Schmielau de25968cc8 [PATCH] fix more missing includes
Include fixes for 2.6.14-git11.  Should allow to remove sched.h from
module.h on i386, x86_64, arm, ia64, ppc, ppc64, and s390.  Probably more
to come since I haven't yet checked the other archs.

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>
2006-01-08 20:13:45 -08:00
Roland Dreier 47f2bce902 [IB] srp: don't post receive if no send buf available
Have __srp_get_tx_iu() fail if the target port's request limit will
not allow the initiator to post a send.  This avoids continuing on and
posting a receive, and then failing to post a corresponding send.  If
that happens, then the initiator will end up with an extra receive
posted, and if this happens to much, the receive queue will overflow.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-11-15 00:19:21 -08:00
Roland Dreier 5f068992a1 [IB] srp: increase max_luns
Increase SRP max_luns to 512 to match the kernel's default, since SRP
storage targets can have lots of LUNs and the SRP initiator itself
doesn't have any particular limit.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-11-11 14:06:01 -08:00
Olaf Hering 733482e445 [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason
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>
2005-11-09 07:55:57 -08:00
Roland Dreier aef9ec39c4 IB: Add SCSI RDMA Protocol (SRP) initiator
Add an InfiniBand SCSI RDMA Protocol (SRP) initiator.  This driver is
used to talk talk to InfiniBand SRP targets (storage devices).

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-11-02 14:07:13 -08:00