Commit graph

1182 commits

Author SHA1 Message Date
Yoann Padioleau
dd00cc486a some kmalloc/memset ->kzalloc (tree wide)
Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).

Here is a short excerpt of the semantic patch performing
this transformation:

@@
type T2;
expression x;
identifier f,fld;
expression E;
expression E1,E2;
expression e1,e2,e3,y;
statement S;
@@

 x =
- kmalloc
+ kzalloc
  (E1,E2)
  ...  when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\)
- memset((T2)x,0,E1);

@@
expression E1,E2,E3;
@@

- kzalloc(E1 * E2,E3)
+ kcalloc(E1,E2,E3)

[akpm@linux-foundation.org: get kcalloc args the right way around]
Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Bryan Wu <bryan.wu@analog.com>
Acked-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Acked-by: Roland Dreier <rolandd@cisco.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Acked-by: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Greg KH <greg@kroah.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:50 -07:00
Roland Dreier
43509d1fec IB/mthca: Simplify use of size0 in work request posting
Current code sets size0 to 0 at the start of work request posting
functions and then handles size0 == 0 specially within the loop over
work requests.  Change this so size0 is set along with f0 the first
time through the loop (when nreq == 0).  This makes the code easier to
understand by making it clearer that f0 and size0 are always
initialized if nreq != 0 without having to know that size0 == 0
implies nreq == 0.

Also annotate size0 with uninitialized_var() so that this doesn't
introduce a new compiler warning.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-18 13:28:29 -07:00
Roland Dreier
e535c699bf IB/mthca: Factor out setting WQE UD segment entries
Factor code to set UD entries out of the work request posting
functions into inline functions set_tavor_ud_seg() and
set_arbel_ud_seg().  This doesn't change the generated code in any
significant way, and makes the source easier on the eyes.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-18 13:21:14 -07:00
Roland Dreier
400ddc11eb IB/mthca: Factor out setting WQE remote address and atomic segment entries
Factor code to set remote address and atomic segment entries out of the
work request posting functions into inline functions set_raddr_seg()
and set_atomic_seg().  This doesn't change the generated code in any
significant way, and makes the source easier on the eyes.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-18 12:55:42 -07:00
Roland Dreier
0fbfa6a906 IB/mlx4: Factor out setting other WQE segments
Factor code to set remote address, atomic and datagram segments out of
mlx4_ib_post_send() into small helper functions.  This doesn't change
the generated code in any significant way, and makes the source easier
on the eyes.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-18 11:47:55 -07:00
Roland Dreier
d420d9e32f IB/mlx4: Factor out setting WQE data segment entries
Factor code to set data segment entries out of mlx4_ib_post_send()
into set_data_seg().  This cleans up the code and lets the compiler do
a better job -- on x86_64:

add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-16 (-16)
function                                     old     new   delta
mlx4_ib_post_send                           1598    1582     -16

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-18 11:46:27 -07:00
Roland Dreier
80885456e8 IB/mthca: Factor out setting WQE data segment entries
Factor code to set data segment entries out of the work request
posting functions into inline functions mthca_set_data_seg() and
mthca_set_data_seg_inval().  This makes the code more readable and
also allows the compiler to do a better job -- on x86_64:

add/remove: 0/0 grow/shrink: 0/6 up/down: 0/-69 (-69)
function                                     old     new   delta
mthca_arbel_post_srq_recv                    373     369      -4
mthca_arbel_post_receive                     570     562      -8
mthca_tavor_post_srq_recv                    520     508     -12
mthca_tavor_post_send                       1344    1330     -14
mthca_arbel_post_send                       1481    1467     -14
mthca_tavor_post_receive                     792     775     -17

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-18 11:30:34 -07:00
Roland Dreier
7f5eb9bb8c IB/mlx4: Return receive queue sizes for userspace QPs from query QP
Return the receive queue sizes for both userspace QPs and kernel Qps
(not just kernel QPs) from mlx4_ib_query_qp().  Also zero the send
queue sizes for userspace QPs to avoid a possible information leak,
and set the max_inline_data for kernel QPs to 0 since inline sends are
not supported for kernel QPs.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 20:59:02 -07:00
Dotan Barak
8f076531cd RDMA/cma: Remove local write permission from QP access flags
Local write permission makes no sense as part of the QP access flags,
since the access flags only control what the remote end of the
connection is allowed to do.  Remove the code in the RDMA CM that
initializes qp_access_flags with IB_ACCESS_LOCAL_WRITE.

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 20:30:22 -07:00
Roland Dreier
6d7d080e9f IB/mthca: Use uninitialized_var() for f0
Commit 9db48926 ("drivers/infiniband/hw/mthca/mthca_qp: kill uninit'd
var warning") added "= 0" to the declarations of f0 to shut up gcc
warnings.  However, there's no point in making the code bigger by
initializing f0 to a random value just to get rid of a warning;
setting f0 to 0 is no safer than just using uninitialized_var(), which
documents the situation better and gives smaller code too.  For example, 
on x86_64:

add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-16 (-16)
function                                     old     new   delta
mthca_tavor_post_send                       1352    1344      -8
mthca_arbel_post_send                       1489    1481      -8

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 19:30:51 -07:00
Roland Dreier
454a01e7f4 IB/cm: Make internal function cm_get_ack_delay() static
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:43 -07:00
Roland Dreier
1743b91710 IB/ipath: Remove ipath_get_user_pages_nocopy()
It has no callers and is completely dead code.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:43 -07:00
Roland Dreier
da9aec7b62 IB/ipath: Make a few functions static
Make some functions that are only used in a single .c file static.  In
addition to being a cleanup, this shrinks the generated code.  On x86_64:

add/remove: 1/3 grow/shrink: 2/1 up/down: 4777/-4956 (-179)
function                                     old     new   delta
handle_errors                                  -    3994   +3994
__verbs_timer                                 42     710    +668
ipath_do_ruc_send                           2131    2246    +115
ipath_no_bufs_available                      136       -    -136
ipath_disarm_senderrbufs                     639       -    -639
ipath_ib_timer                               658       -    -658
ipath_intr                                  5878    2355   -3523

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:43 -07:00
Roland Dreier
41179e2de6 IB/iser: Make a couple of functions static
Make iser_conn_release() and iser_start_rdma_unaligned_sg() static,
since they are only used in the .c file where they are defined.  In
addition to being a cleanup, this even shrinks the generated code by
allowing the single call of iser_start_rdma_unaligned_sg() to be
inlined into its callsite.  On x86_64:

add/remove: 0/1 grow/shrink: 1/0 up/down: 466/-533 (-67)
function                                     old     new   delta
iser_reg_rdma_mem                           1518    1984    +466
iser_start_rdma_unaligned_sg                 533       -    -533

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:42 -07:00
Roland Dreier
e4daf73868 IB/mthca: Fix printk format used for firmware version in warning
When warning about out-of-date firmware, current mthca code messes up
the formatting of the version if the subminor doesn't have three
digits.  It doesn't fill the field with 0s so we end up with:

    ib_mthca 0000:0b:00.0: HCA FW version 1.1.  0 is old (1.2.  0 is current).

Change the format from "%3d" to "%03d" to get the right thing printed.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:42 -07:00
Roland Dreier
f6be6fbe26 IB/mthca: Schedule MSI support for removal
The mthca driver supports both MSI and MSI-X.  However, MSI-X works with
all hardware that the driver handles, and provides a superset of what
MSI does, so there's no point in having code for both.  Schedule MSI
support for removal in 2008 to give anyone who actually needs MSI and
who can't use MSI time to speak up.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:41 -07:00
Hoang-Nam Nguyen
2b94397adc IB/ehca: Fix warnings issued by checkpatch.pl
Run the existing ehca code through checkpatch.pl and clean up the
worst of the coding style violations.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:40 -07:00
Hoang-Nam Nguyen
187c72e31f IB/ehca: Restructure ehca_set_pagebuf()
Split ehca_set_pagebuf() into three functions depending on MR type
(phys/user/fast) and remove superfluous ehca_set_pagebuf_1().

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:40 -07:00
Hoang-Nam Nguyen
df17bfd4a0 IB/ehca: MR/MW structure refactoring
- Rename struct ehca_mr fields to clearly distinguish between kernel
  and HW page size.
- Sort struct ehca_mr_pginfo into a common part and a union containing
  specific fields for physical, user and fast MR

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:40 -07:00
Hoang-Nam Nguyen
2492398e61 IB/ehca: Use macro to calculate number of chunks in a mem block
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:39 -07:00
Hoang-Nam Nguyen
4e4e74cae7 IB/ehca: Use #define for "pages per register_rpage" instead of hardcoded value
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:39 -07:00
Hoang-Nam Nguyen
a1a6ff1100 IB/ehca: Use common error code mapping instead of specific ones
Instead of one error mapping function for each potential error source
in ehca_mrmw.c, use a centralized function that handles all cases,
saving a three-figure line count.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:39 -07:00
Hoang-Nam Nguyen
3df78f81e0 IB/ehca: Fix memory leak in error path of ehca_get_dma_mr()
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:39 -07:00
Joachim Fenkes
fbb9318be4 IB/ehca: Fix HW level autodetection
Autodetection was missing a few HW revisions, causing certain eHCA1
revisions to be treated like eHCA2.  Fixed.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:39 -07:00
Dotan Barak
8fcea95a2a IB/mlx4: Take sizeof the correct pointer in call to memset()
When clearing the ib_ah_attr parameter in to_ib_ah_attr(), use sizeof
*ib_ah_attr instead of sizeof *path.  This is the same bug as was
fixed for mthca in 99d4f22e ("IB/mthca: Use correct structure size in
call to memset()"), but the code was cut and pasted into mlx4 before the
fix was merged.

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:38 -07:00
Jack Morgenstein
1c27cb71aa IB/mlx4: Fix port returned from query QP for QPs in INIT state
When a QP is in the INIT state, the sched_queue field hasn't been given 
to the firmware yet, so the firmware cannot return the value when the QP 
is queried.  To handle this, use the port number that is saved in the 
driver's QP data structure.

Found by Dotan Barak and Yaron Gepstein of Mellanox.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:38 -07:00
Jack Morgenstein
586bb586ae IB/mlx4: Fix flow label returned from query QP
Correct the mask used to get the flow label, since the field is 20 bits, 
not 24 bits.

Found by Dotan Barak and Yaron Gepstein of Mellanox. 

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:38 -07:00
Steve Wise
1b07db7079 RDMA/cxgb3: Remove cm_id reference on listen failures
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:38 -07:00
Jeff Garzik
9db4892620 drivers/infiniband/hw/mthca/mthca_qp: kill uninit'd var warning
drivers/infiniband/hw/mthca/mthca_qp.c: In function
  ‘mthca_tavor_post_send’:
drivers/infiniband/hw/mthca/mthca_qp.c:1594: warning: ‘f0’ may be used
  uninitialized in this function
drivers/infiniband/hw/mthca/mthca_qp.c: In function
  ‘mthca_arbel_post_send’:
drivers/infiniband/hw/mthca/mthca_qp.c:1949: warning: ‘f0’ may be used
  uninitialized in this function

Initializing 'f0' is not strictly necessary in either case, AFAICS.

I was considering use of uninitialized_var(), but looking at the
complex flow of control in each function, I feel it is wiser and
safer to simply zero the var and be certain of ourselves.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-17 16:18:00 -04:00
Linus Torvalds
bc06cffdec Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (166 commits)
  [SCSI] ibmvscsi: convert to use the data buffer accessors
  [SCSI] dc395x: convert to use the data buffer accessors
  [SCSI] ncr53c8xx: convert to use the data buffer accessors
  [SCSI] sym53c8xx: convert to use the data buffer accessors
  [SCSI] ppa: coding police and printk levels
  [SCSI] aic7xxx_old: remove redundant GFP_ATOMIC from kmalloc
  [SCSI] i2o: remove redundant GFP_ATOMIC from kmalloc from device.c
  [SCSI] remove the dead CYBERSTORMIII_SCSI option
  [SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA
  [SCSI] Clean up scsi_add_lun a bit
  [SCSI] 53c700: Remove printk, which triggers because of low scsi clock on SNI RMs
  [SCSI] sni_53c710: Cleanup
  [SCSI] qla4xxx: Fix underrun/overrun conditions
  [SCSI] megaraid_mbox: use mutex instead of semaphore
  [SCSI] aacraid: add 51245, 51645 and 52245 adapters to documentation.
  [SCSI] qla2xxx: update version to 8.02.00-k1.
  [SCSI] qla2xxx: add support for NPIV
  [SCSI] stex: use resid for xfer len information
  [SCSI] Add Brownie 1200U3P to blacklist
  [SCSI] scsi.c: convert to use the data buffer accessors
  ...
2007-07-15 16:51:54 -07:00
Linus Torvalds
0cdf6990e9 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (76 commits)
  IB: Update MAINTAINERS with Hal's new email address
  IB/mlx4: Implement query SRQ
  IB/mlx4: Implement query QP
  IB/cm: Send no match if a SIDR REQ does not match a listen
  IB/cm: Fix handling of duplicate SIDR REQs
  IB/cm: cm_msgs.h should include ib_cm.h
  IB/cm: Include HCA ACK delay in local ACK timeout
  IB/cm: Use spin_lock_irq() instead of spin_lock_irqsave() when possible
  IB/sa: Make sure SA queries use default P_Key
  IPoIB: Recycle loopback skbs instead of freeing and reallocating
  IB/mthca: Replace memset(<addr>, 0, PAGE_SIZE) with clear_page(<addr>)
  IPoIB/cm: Fix warning if IPV6 is not enabled
  IB/core: Take sizeof the correct pointer when calling kmalloc()
  IB/ehca: Improve latency by unlocking after triggering the hardware
  IB/ehca: Notify consumers of LID/PKEY/SM changes after nondisruptive events
  IB/ehca: Return QP pointer in poll_cq()
  IB/ehca: Change idr spinlocks into rwlocks
  IB/ehca: Refactor sync between completions and destroy_cq using atomic_t
  IB/ehca: Lock renaming, static initializers
  IB/ehca: Report RDMA atomic attributes in query_qp()
  ...
2007-07-12 16:45:40 -07:00
Jack Morgenstein
65541cb7cf IB/mlx4: Implement query SRQ
Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-12 15:41:24 -07:00
Jack Morgenstein
6a775e2ba4 IB/mlx4: Implement query QP
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-12 15:41:00 -07:00
Linus Torvalds
21ba0f88ae Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (34 commits)
  PCI: Only build PCI syscalls on architectures that want them
  PCI: limit pci_get_bus_and_slot to domain 0
  PCI: hotplug: acpiphp: avoid acpiphp "cannot get bridge info" PCI hotplug failure
  PCI: hotplug: acpiphp: remove hot plug parameter write to PCI host bridge
  PCI: hotplug: acpiphp: fix slot poweroff problem on systems without _PS3
  PCI: hotplug: pciehp: wait for 1 second after power off slot
  PCI: pci_set_power_state(): check for PM capabilities earlier
  PCI: cpci_hotplug: Convert to use the kthread API
  PCI: add pci_try_set_mwi
  PCI: pcie: remove SPIN_LOCK_UNLOCKED
  PCI: ROUND_UP macro cleanup in drivers/pci
  PCI: remove pci_dac_dma_... APIs
  PCI: pci-x-pci-express-read-control-interfaces cleanups
  PCI: Fix typo in include/linux/pci.h
  PCI: pci_ids, remove double or more empty lines
  PCI: pci_ids, add atheros and 3com_2 vendors
  PCI: pci_ids, reorder some entries
  PCI: i386: traps, change VENDOR to DEVICE
  PCI: ATM: lanai, change VENDOR to DEVICE
  PCI: Change all drivers to use pci_device->revision
  ...
2007-07-12 13:40:57 -07:00
Tejun Heo
7b595756ec sysfs: kill unnecessary attribute->owner
sysfs is now completely out of driver/module lifetime game.  After
deletion, a sysfs node doesn't access anything outside sysfs proper,
so there's no reason to hold onto the attribute owners.  Note that
often the wrong modules were accounted for as owners leading to
accessing removed modules.

This patch kills now unnecessary attribute->owner.  Note that with
this change, userland holding a sysfs node does not prevent the
backing module from being unloaded.

For more info regarding lifetime rule cleanup, please read the
following message.

  http://article.gmane.org/gmane.linux.kernel/510293

(tweaked by Greg to not delete the field just yet, to make it easier to
merge things properly.)

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:09:06 -07:00
Auke Kok
44c10138fd PCI: Change all drivers to use pci_device->revision
Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:02:10 -07:00
Sean Hefty
6164c8cd13 IB/cm: Send no match if a SIDR REQ does not match a listen
If a SIDR REQ does not match a listen, we should reply with status
value 1 (service ID not supported), rather than dropping through to
the default case of status 2 (rejected by service provider).

Doing this also fixes a bug where the cm_id_priv is removed from the
remote_sidr_table twice.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 21:52:28 -07:00
Sean Hefty
29c2731cbf IB/cm: Fix handling of duplicate SIDR REQs
Fix handling to duplicate SIDR REQs to avoid sending a reject if a
duplicate is detected.  Duplicates should just be silently discarded.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 21:51:43 -07:00
Sean Hefty
5d861be8c8 IB/cm: cm_msgs.h should include ib_cm.h
cm_msgs.h uses definitions from ib_cm.h.  Include it directly, rather
than depending on a specific include order.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 21:50:53 -07:00
Sean Hefty
1d84612649 IB/cm: Include HCA ACK delay in local ACK timeout
The IB CM should include the HCA ACK delay when calculating the local
ACK timeout value to use for RC QPs.  If the HCA ACK delay is large
enough relative to the packet life time, then if it is not taken into
account, the calculated timeout value ends up being too small, which
can result in "retry exceeded" errors.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 21:50:05 -07:00
Sean Hefty
24be6e81c7 IB/cm: Use spin_lock_irq() instead of spin_lock_irqsave() when possible
The ib_cm is a little over zealous about using spin_lock_irqsave,
when spin_lock_irq would do.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 21:47:29 -07:00
Sean Hefty
2aec5c602c IB/sa: Make sure SA queries use default P_Key
MADs sent to the SA should use the the default P_Key (0x7fff/0xffff).
There's no requirement that the default P_Key is stored at index 0 in
the local P_Key table, so add code to the sa_query module to look up
the index of the default P_Key when creating an address handle for the
SA (which is done any time the P_Key table might change), and use this
index for all SA queries.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 21:45:31 -07:00
Roland Dreier
1b844afe9e IPoIB: Recycle loopback skbs instead of freeing and reallocating
InfiniBand HCAs replicate multicast packets back to the QP that sent
them if that QP is attached to the destination multicast group.  This
means that IPoIB multicasts are often replicated back to the receive
queue of the interface that generated them.  To avoid confusing the
network stack, we drop these duplicates within the IPoIB driver.

However, there's no reason to free the skb that received the duplicate
and then immediately allocate a new skb to post to the receive queue.
We can be more efficient and just repost the same skb.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 13:43:53 -07:00
Shani Moideen
8909c571fa IB/mthca: Replace memset(<addr>, 0, PAGE_SIZE) with clear_page(<addr>)
Signed-off-by: Shani Moideen <shani.moideen@wipro.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
----
2007-07-10 12:28:05 -07:00
Roland Dreier
20089ca557 IPoIB/cm: Fix warning if IPV6 is not enabled
Fix

    drivers/infiniband/ulp/ipoib/ipoib_cm.c:1151: warning: unused variable 'dev'

by getting rid of the variable dev, which is only used if CONFIG_IPV6
is enabled, and replacing the one use of it with the value it is
assigned, namely priv->dev.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 11:18:34 -07:00
Dotan Barak
856c52a741 IB/core: Take sizeof the correct pointer when calling kmalloc()
When allocating out_mad in show_pma_counter(), take sizeof *out_mad
instead of sizeof *in_mad.  It is true that today the type of in_mad
and out_mad are the same, but this patch will give us a cleaner code.

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10 11:04:40 -07:00
Hoang-Nam Nguyen
f72d2f0814 IB/ehca: Improve latency by unlocking after triggering the hardware
Kick the hardware before unlocking the send/receive queue to overlap
processing a little more.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00
Joachim Fenkes
8705ce5b90 IB/ehca: Notify consumers of LID/PKEY/SM changes after nondisruptive events
When firmware reports a nondisruptive port configuration change event,
previous versions of the eHCA driver didn't forward the event to consumers
like IPoIB.  Add code that determines the type of configuration change by
comparing old and new port attributes and reports it.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00
Joachim Fenkes
b1cfe43d4b IB/ehca: Return QP pointer in poll_cq()
Also add two unlikely() statements.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00
Joachim Fenkes
26ed687fdd IB/ehca: Change idr spinlocks into rwlocks
This eliminates lock contention among IRQs as well as the need to
disable IRQs around idr_find, because there are no IRQ writers.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00