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1314 commits

Author SHA1 Message Date
Moni Shoua
200d1713b4 IB/ipoib: Verify address handle validity on send
When the bonding device senses a carrier loss of its active slave it replaces
that slave with a new one. In between the times when the carrier of an IPoIB
device goes down and ipoib_neigh is destroyed, it is possible that the
bonding driver will send a packet on a new slave that uses an old ipoib_neigh.
This patch detects and prevents this from happenning.

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
Acked-by: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-15 14:20:45 -04:00
Moni Shoua
732a2170f4 IB/ipoib: Bound the net device to the ipoib_neigh structue
IPoIB uses a two layer neighboring scheme, such that for each struct neighbour
whose device is an ipoib one, there is a struct ipoib_neigh buddy which is
created on demand at the tx flow by an ipoib_neigh_alloc(skb->dst->neighbour)
call.

When using the bonding driver, neighbours are created by the net stack on behalf
of the bonding (master) device. On the tx flow the bonding code gets an skb such
that skb->dev points to the master device, it changes this skb to point on the
slave device and calls the slave hard_start_xmit function.

Under this scheme, ipoib_neigh_destructor assumption that for each struct
neighbour it gets, n->dev is an ipoib device and hence netdev_priv(n->dev)
can be casted to struct ipoib_dev_priv is buggy.

To fix it, this patch adds a dev field to struct ipoib_neigh which is used
instead of the struct neighbour dev one, when n->dev->flags has the
IFF_MASTER bit set.

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
Acked-by: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-15 14:20:45 -04:00
Linus Torvalds
df3d80f5a5 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: (207 commits)
  [SCSI] gdth: fix CONFIG_ISA build failure
  [SCSI] esp_scsi: remove __dev{init,exit}
  [SCSI] gdth: !use_sg cleanup and use of scsi accessors
  [SCSI] gdth: Move members from SCp to gdth_cmndinfo, stage 2
  [SCSI] gdth: Setup proper per-command private data
  [SCSI] gdth: Remove gdth_ctr_tab[]
  [SCSI] gdth: switch to modern scsi host registration
  [SCSI] gdth: gdth_interrupt() gdth_get_status() & gdth_wait() fixes
  [SCSI] gdth: clean up host private data
  [SCSI] gdth: Remove virt hosts
  [SCSI] gdth: Reorder scsi_host_template intitializers
  [SCSI] gdth: kill gdth_{read,write}[bwl] wrappers
  [SCSI] gdth: Remove 2.4.x support, in-kernel changelog
  [SCSI] gdth: split out pci probing
  [SCSI] gdth: split out eisa probing
  [SCSI] gdth: split out isa probing
  gdth: Make one abuse of scsi_cmnd less obvious
  [SCSI] NCR5380: Use scsi_eh API for REQUEST_SENSE invocation
  [SCSI] usb storage: use scsi_eh API in REQUEST_SENSE execution
  [SCSI] scsi_error: Refactoring scsi_error to facilitate in synchronous REQUEST_SENSE
  ...
2007-10-15 08:19:33 -07:00
Kay Sievers
7eff2e7a8b Driver core: change add_uevent_var to use a struct
This changes the uevent buffer functions to use a struct instead of a
long list of parameters. It does no longer require the caller to do the
proper buffer termination and size accounting, which is currently wrong
in some places. It fixes a known bug where parts of the uevent
environment are overwritten because of wrong index calculations.

Many thanks to Mathieu Desnoyers for finding bugs and improving the
error handling.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:51:01 -07:00
FUJITA Tomonori
aebd5e476e [SCSI] transport_srp: add rport roles attribute
This adds a 'roles' attribute to rport like transport_fc. The role can
be initiator or target. That is, the initiator driver creates target
remote ports and the target driver creates initiator remote ports.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-10-12 14:37:46 -04:00
FUJITA Tomonori
3236822b1c [SCSI] ib_srp: convert to use the srp transport class
This converts ib_srp to use the srp transport class.

I don't have ib hardware so I've not tested this patch.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-10-12 14:37:42 -04:00
Linus Torvalds
ce9d3c9a6a 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: (87 commits)
  mlx4_core: Fix section mismatches
  IPoIB: Allow setting policy to ignore multicast groups
  IB/mthca: Mark error paths as unlikely() in post_srq_recv functions
  IB/ipath: Minor fix to ordering of freeing and zeroing of tid pages.
  IB/ipath: Remove redundant link state checks
  IB/ipath: Fix IB_EVENT_PORT_ERR event
  IB/ipath: Better handling of unexpected GPIO interrupts
  IB/ipath: Maintain active time on all chips
  IB/ipath: Fix QHT7040 serial number check
  IB/ipath: Indicate a couple of chip bugs to userspace
  IB/ipath: iba6110 rev4 no longer needs recv header overrun workaround
  IB/ipath: Use counters in ipath_poll and cleanup interrupts in ipath_close
  IB/ipath: Remove duplicate copy of LMC
  IB/ipath: Add ability to set the LMC via the sysfs debugging interface
  IB/ipath: Optimize completion queue entry insertion and polling
  IB/ipath: Implement IB_EVENT_QP_LAST_WQE_REACHED
  IB/ipath: Generate flush CQE when QP is in error state
  IB/ipath: Remove redundant code
  IB/ipath: Future proof eeprom checksum code (contents reading)
  IB/ipath: UC RDMA WRITE with IMMEDIATE doesn't send the immediate
  ...
2007-10-11 19:43:13 -07:00
Stephen Hemminger
227b60f510 [INET]: local port range robustness
Expansion of original idea from Denis V. Lunev <den@openvz.org>

Add robustness and locking to the local_port_range sysctl.
1. Enforce that low < high when setting.
2. Use seqlock to ensure atomic update.

The locking might seem like overkill, but there are
cases where sysadmin might want to change value in the
middle of a DoS attack.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 17:30:46 -07:00
Roland Dreier
9153f66a5b IPoIB: Fix unused variable warning
The conversion to use netdevice internal stats left an unused variable
in ipoib_neigh_free(), since there's no longer any reason to get
netdev_priv() in order to increment dropped packets.  Delete the
unused priv variable.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10 16:55:30 -07:00
Roland Dreier
de90351219 [IPoIB]: Convert to netdevice internal stats
Use the stats member of struct netdevice in IPoIB, so we can save
memory by deleting the stats member of struct ipoib_dev_priv, and save
code by deleting ipoib_get_stats().

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:53:41 -07:00
Stephen Hemminger
3b04ddde02 [NET]: Move hardware header operations out of netdevice.
Since hardware header operations are part of the protocol class
not the device instance, make them into a separate object and
save memory.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:52:52 -07:00
Ralf Baechle
10d024c1b2 [NET]: Nuke SET_MODULE_OWNER macro.
It's been a useless no-op for long enough in 2.6 so I figured it's time to
remove it.  The number of people that could object because they're
maintaining unified 2.4 and 2.6 drivers is probably rather small.

[ Handled drivers added by netdev tree and some missed IRDA cases... -DaveM ]

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:51:13 -07:00
Eric W. Biederman
881d966b48 [NET]: Make the device list and device lookups per namespace.
This patch makes most of the generic device layer network
namespace safe.  This patch makes dev_base_head a
network namespace variable, and then it picks up
a few associated variables.  The functions:
dev_getbyhwaddr
dev_getfirsthwbytype
dev_get_by_flags
dev_get_by_name
__dev_get_by_name
dev_get_by_index
__dev_get_by_index
dev_ioctl
dev_ethtool
dev_load
wireless_process_ioctl

were modified to take a network namespace argument, and
deal with it.

vlan_ioctl_set and brioctl_set were modified so their
hooks will receive a network namespace argument.

So basically anthing in the core of the network stack that was
affected to by the change of dev_base was modified to handle
multiple network namespaces.  The rest of the network stack was
simply modified to explicitly use &init_net the initial network
namespace.  This can be fixed when those components of the network
stack are modified to handle multiple network namespaces.

For now the ifindex generator is left global.

Fundametally ifindex numbers are per namespace, or else
we will have corner case problems with migration when
we get that far.

At the same time there are assumptions in the network stack
that the ifindex of a network device won't change.  Making
the ifindex number global seems a good compromise until
the network stack can cope with ifindex changes when
you change namespaces, and the like.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:49:10 -07:00
Stephen Hemminger
bea3348eef [NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.

In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.

The signature of the ->poll() call back goes from:

	int foo_poll(struct net_device *dev, int *budget)

to

	int foo_poll(struct napi_struct *napi, int budget)

The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract).  The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.

The napi_struct is to be embedded in the device driver private data
structures.

Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler.  Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.

With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.

Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.

[ Ported to current tree and all drivers converted.  Integrated
  Stephen's follow-on kerneldoc additions, and restored poll_list
  handling to the old style to fix mutual exclusion issues.  -DaveM ]

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:47:45 -07:00
Or Gerlitz
335a64a5a9 IPoIB: Allow setting policy to ignore multicast groups
The kernel IB stack allows (through the RDMA CM) userspace
applications to join and use multicast groups from the IPoIB MGID
range.  This allows multicast traffic to be handled directly from
userspace QPs, without going through the kernel stack, which gives
better performance for some applications.

However, to fully interoperate with IP multicast, such userspace
applications need to participate in IGMP reports and queries, or else
routers may not forward the multicast traffic to the system where the
application is running.  The simplest way to do this is to share the
kernel IGMP implementation by using the IP_ADD_MEMBERSHIP option to
join multicast groups that are being handled directly in userspace.

However, in such cases, the actual multicast traffic should not also
be handled by the IPoIB interface, because that would burn resources
handling multicast packets that will just be discarded in the kernel.

To handle this, this patch adds lookup on the database used for IB
multicast group reference counting when IPoIB is joining multicast
groups, and if a multicast group is already handled by user space,
then the IPoIB kernel driver ignores the group.  This is controlled by
a per-interface policy flag.  When the flag is set, IPoIB will not
join and attach its QP to a multicast group which already has an entry
in the database; when the flag is cleared, IPoIB will behave as before
this change.

For each IPoIB interface, the /sys/class/net/$intf/umcast attribute
controls the policy flag.  The default value is off/0.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-10 13:02:30 -07:00
Eli Cohen
55a98e955c IB/mthca: Mark error paths as unlikely() in post_srq_recv functions
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-10 11:24:33 -07:00
Dave Olson
3ac8c70f74 IB/ipath: Minor fix to ordering of freeing and zeroing of tid pages.
Fixed to be the same as everywhere else.  copy and then zero the page *
in the array first, and then pass the copy to the VM routines.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 21:03:02 -07:00
Ralph Campbell
bda94e32b3 IB/ipath: Remove redundant link state checks
This patch removes some redundant checks when the SMA changes the link
state since the same checks are made in the lower level function that
sets the state.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 21:02:08 -07:00
Ralph Campbell
49739b3e24 IB/ipath: Fix IB_EVENT_PORT_ERR event
The link state event calls were being generated when the SM told the SMA
to change link states. This works for IB_EVENT_PORT_ACTIVE but not if
the link goes down and stays down. The fix is to generate event calls
from the interrupt handler when the HW link state changes.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 21:01:38 -07:00
Michael Albaugh
6a733cdc71 IB/ipath: Better handling of unexpected GPIO interrupts
The General Purpose I/O pins can be configured to cause interrupts. At
the end of the interrupt code dealing with all known causes, a message
is output if any bits remain un-handled. Since this is a "can't happen"
scenario, it should only be triggered by bugs elsewhere. It is harmless,
and potentially beneficial, to limit the damage by masking any such
unexpected interrupts.

This patch adds disabling of interrupts from any pins that should
not have been allowed to interrupt, in addition to emitting a message.

Signed-off-by: Michael Albaugh <Michael.Albaugh@Qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 21:00:47 -07:00
Michael Albaugh
192594d523 IB/ipath: Maintain active time on all chips
There is a count of "active hours" maintained in EEPROM, to aid
troubleshooting. The definition of "active" is based on traffic
exceeding a threshold in any given 5-second polling interval. As
originally written, the check was inadvertently bypassed for chips whose
counters were 64-bits wide, and only applied to chips with 32-bit wide
counters.

This patch moves the test for amount of traffic "out" to a more common
location, rather than depending on a side-effect of the software
emulation of 64-bit counts on chips whose hardware is only 32-bits wide.

Signed-off-by: Michael Albaugh <Michael.Albaugh@Qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 21:00:08 -07:00
Dave Olson
aa7c79abd1 IB/ipath: Fix QHT7040 serial number check
Remove all the OEM and bringup boards, and complain and fail
initialization if one is found.  QHT7040 with GPIO rework (128ywwuuuu)
is OK, older 112ywwuuuu is no longer supported). The check that had been
added was failing both the 112 and 128 series.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:58:49 -07:00
Arthur Jones
20bed34314 IB/ipath: Indicate a couple of chip bugs to userspace
A couple of chip bugs in the iba6110 and in the iba6120 are not in more
recent chips.  This first bug swaps two of the pioavail register
locations.  In the second bug, the chip can sometimes forget to dma the
pio avail register to memory.  We indicate the presence of these bugs
with runtime flags and we indicate the presence of the flags by bumping
the SWMINOR.

Signed-off-by: Arthur Jones <arthur.jones@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:57:54 -07:00
Arthur Jones
4bec0b9155 IB/ipath: iba6110 rev4 no longer needs recv header overrun workaround
iba6110 rev3 and earlier had a chip bug where the chip could overrun the
recv header queue. rev4 fixed this chip bug so userspace no longer needs
to workaround it.  Now we only set the workaround flag for older chip
versions.

Signed-off-by: Arthur Jones <arthur.jones@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:56:59 -07:00
Arthur Jones
70c51da2c4 IB/ipath: Use counters in ipath_poll and cleanup interrupts in ipath_close
ipath_poll() suffered from a couple subtle bugs.  Under the right
conditions we could leave recv interrupts enabled on an ipath user
context on close, thereby taking potentially unwanted interrupts on the
next open -- this is fixed by unconditionally turning off recv
interrupts on close.  Also, we now use counters rather than set/clear
bits which allows us to make sure we catch all interrupts at the cost of
changing the semantics slightly (it's now give me all events since the
last time I called poll() rather than give me all events since I called
_this_ poll routine).  We also added some memory barriers which may help
ensure we get all notifications in a timely manner.

Signed-off-by: Arthur Jones <arthur.jones@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:56:23 -07:00
Ralph Campbell
542869a17e IB/ipath: Remove duplicate copy of LMC
The LMC value was being saved by the SMA in two places. This patch
cleans it up so only one copy is kept.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:55:06 -07:00
Ralph Campbell
15cba26f42 IB/ipath: Add ability to set the LMC via the sysfs debugging interface
This patch adds the ability to set the LMC via a sysfs file as if the SM
sent a SubnSet(PortInfo) MAD.  It is useful for debugging when no SM is
running.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:53:50 -07:00
Ralph Campbell
6cff2faaf1 IB/ipath: Optimize completion queue entry insertion and polling
The code to add an entry to the completion queue stored the QPN which is
needed for the user level verbs view of the completion queue entry but
the kernel struct ib_wc contains a pointer to the QP instead of a QPN.
When the kernel polled for a completion queue entry, the QPN was lookup
up and the QP pointer recovered. This patch stores the CQE differently
based on whether the CQ is a kernel CQ or a user CQ thus avoiding the
QPN to QP lookup overhead.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:52:23 -07:00
Ralph Campbell
d42b01b584 IB/ipath: Implement IB_EVENT_QP_LAST_WQE_REACHED
This patch implements the IB_EVENT_QP_LAST_WQE_REACHED event which is
needed by ib_ipoib to destroy the QP when used in connected mode.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:51:20 -07:00
Ralph Campbell
c9cf7db2bc IB/ipath: Generate flush CQE when QP is in error state
Follow the IB spec. (C10-96) for post send which states that a flushed 
completion event should be generated for work requests posted when a QP
is in the error state.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:50:29 -07:00
Ralph Campbell
036be09ca5 IB/ipath: Remove redundant code
This patch removes some redundant initialization code.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:46:23 -07:00
Dave Olson
d29cc6efb9 IB/ipath: Future proof eeprom checksum code (contents reading)
In an earlier change, the amount of data read from the flash was
mistakenly limited to the size known to the current driver.  This causes
problems when the length is increased, and written with the new longer
version; the checksum would fail because not enough data was read.
Always read the full 128 byte length to prevent this.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:45:57 -07:00
Ralph Campbell
55046698fa IB/ipath: UC RDMA WRITE with IMMEDIATE doesn't send the immediate
This patch fixes a bug in the receive processing for UC RDMA WRITE with
immediate which caused the last packet to be dropped.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:44:56 -07:00
Dave Olson
9ef8617af7 IB/ipath: Correctly describe workaround for TID write chip bug
This is a comment change, only, correcting the comment to match the
implemented workaround, rather than the original workaround, and
clarifying why it's needed.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:44:20 -07:00
Ralph Campbell
1793b4771d IB/ipath: Remove unneeded code for ipathfs
The ipathfs file system is used to export binary data verses ASCII data
such as through /sys. This patch removes some unneeded files since the
data is available through other /sys files.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:43:17 -07:00
Dave Olson
9bec399231 IB/ipath: Verify host bus bandwidth to chip will not limit performance
There have been a number of issues where host bandwidth via HT or PCIe
to the InfiniPath chip has been limited in some fashion (BIOS,
configuration, etc.), resulting in user confusion.  This check gives a
clear warning that something is wrong and needs to be resolved.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:20:15 -07:00
Ralph Campbell
4ee97180ac IB/ipath: Change UD to queue work requests like RC & UC
The code to post UD sends tried to process work requests at the time
ib_post_send() is called without using a WQE queue.  This was fine as
long as HW resources were available for sending a packet.  This patch
changes UD to be handled more like RC and UC and shares more code.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:05:49 -07:00
Ralph Campbell
210d6ca3db IB/ipath: Performance optimization for CPU differences
Different processors have different ordering restrictions for write
combining.  By taking advantage of this, we can eliminate some write
barriers when writing to the send buffers.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:04:14 -07:00
Arthur Jones
327a338d4f IB/ipath: iba6110 rev4 GPIO counters support
On iba6110 rev4, support for three more IB counters were added.  The
LocalLinkIntegrityError counter, the ExcessiveBufferOverrunErrors
counter and support for error counting of flow control packets on an
invalid VL.  These counters trigger GPIO interrupts and the sw keeps
track of the counts.  Since we also use GPIO interrupts to signal packet
reception, we need to turn off the fast interrupts, or we risk losing a
GPIO interrupt.

Signed-off-by: Arthur Jones <arthur.jones@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 20:02:46 -07:00
Roland Dreier
76dea3bc26 IB/ehca: Fix clipping of device limits to INT_MAX
Doing min_t(int, foo, INT_MAX) doesn't work correctly, because if foo
is bigger than INT_MAX, then when treated as a signed integer, it will
become negative and hence such an expression is just an elaborate NOP.

Fix such cases in ehca to do min_t(unsigned, foo, INT_MAX) instead.
This fixes negative reported values for max_cqe, max_pd and max_ah:

Before:

        max_cqe:                        -64
        max_pd:                         -1
        max_ah:                         -1

After:
        max_cqe:                        2147483647
        max_pd:                         2147483647
        max_ah:                         2147483647

Based on a bug report and fix from Anton Blanchard <anton@samba.org>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:18 -07:00
Dotan Barak
ede6bc04f3 IPoIB/cm: Clean up initialization of QP attr in ipoib_cm_create_tx_qp()
Make the way QP is being created in ipoib_cm_create_tx_qp()
consistent with ipoib_cm_create_rx_qp().

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:18 -07:00
Roland Dreier
76d7cc0345 IB/mthca: Use mmiowb() to avoid firmware commands getting jumbled up
Firmware commands are sent to the HCA by writing multiple words to a
command register block.  Access to this block of registers is
serialized with a mutex.  However, on large SGI systems, problems were
seen with multiple CPUs issuing FW commands at the same time, because
the writes to the register block may be reordered within the system
interconnect and reach the HCA in a different order than they were
issued (even with the mutex).  Fix this by adding an mmiowb() before
dropping the mutex.

Tested-by: Arthur Kepner <akepner@sgi.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:17 -07:00
Sean Hefty
dcb3f974da RDMA/cma: Queue IB CM MRAs to avoid unnecessary remote retries
Automatically queue MRA message to decrease the number of retries sent
by the remote side during connection establishment.  This also has the
effect of increasing the overall connection timeout without using a
longer retry time in the case of dropped packets.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:17 -07:00
Sean Hefty
de98b693e9 IB/cm: Modify interface to send MRAs in response to duplicate messages
The IB CM provides a message received acknowledged (MRA) message that
can be sent to indicate that a REQ or REP message has been received, but
will require more time to process than the timeout specified by those
messages.  In many cases, the application may not know how long it will
take to respond to a CM message, but the majority of the time, it will
usually respond before a retry has been sent.  Rather than sending an
MRA in response to all messages just to handle the case where a longer
timeout is needed, it is more efficient to queue the MRA for sending in
case a duplicate message is received.

This avoids sending an MRA when it is not needed, but limits the number
of times that a REQ or REP will be resent.  It also provides for a
simpler implementation than generating the MRA based on a timer event.
(That is, trying to send the MRA after receiving the first REQ or REP if
a response has not been generated, so that it is received at the remote
side before a duplicate REQ or REP has been received)

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:17 -07:00
Roland Dreier
1a1eb6a646 IB/mthca: Increase max number of QPs per multicast group to 56
Increase the number of QPs allowed per multicast group from 8 to 56.
This allows for one QP per core on 16-core systems, which are now
quite common, and allows some space for future growth.

This is basically the same patch that Jack Morgenstein
<jackm@dev.mellanox.co.il> just supplied for mlx4.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:17 -07:00
Jack Morgenstein
8ad11fb6b0 IB/mlx4: Implement FMRs
Implement FMRs for mlx4.  This is an adaptation of code from mthca.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:16 -07:00
Jack Morgenstein
d7bb58fb1c mlx4_core: Write MTTs from CPU instead with of WRITE_MTT FW command
Write MTT entries directly to ICM from the driver (eliminating use of
WRITE_MTT command).  This reduces the number of FW commands needed to
register an MR by at least a factor of 2 and speeds up memory
registration significantly.  This code will also be used to implement
FMRs.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:16 -07:00
Roland Dreier
04d29b0ede IB/uverbs: Make ib_uverbs_release_event_file() static
ib_uverbs_release_event_file() is only used in uverbs_main.c, so make it
static to that file.  Also move the definition before the first use, so
a forward declaration is not needed.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:15 -07:00
Roland Dreier
a394f83bdf IB/umad: Fix bit ordering and 32-on-64 problems on big endian systems
The declaration of struct ib_user_mad_reg_req.method_mask[] exported
to userspace was an array of __u32, but the kernel internally treated
it as a bitmap made up of longs.  This makes a difference for 64-bit
big-endian kernels, where numbering the bits in an array of__u32 gives:

    |31.....0|63....31|95....64|127...96|

while numbering the bits in an array of longs gives:

    |63..............0|127............64|

64-bit userspace can handle this by just treating method_mask[] as an
array of longs, but 32-bit userspace is really stuck: the meaning of
the bits in method_mask[] depends on whether the kernel is 32-bit or
64-bit, and there's no sane way for userspace to know that.

Fix this by updating <rdma/ib_user_mad.h> to make it clear that
method_mask[] is an array of longs, and using a compat_ioctl method to
convert to an array of 64-bit longs to handle the 32-on-64 problem.
This fixes the interface description to match existing behavior (so
working binaries continue to work) in almost all situations, and gives
consistent semantics in the case of 32-bit userspace that can run on
either a 32-bit or 64-bit kernel, so that the same binary can work for
both 32-on-32 and 32-on-64 systems.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:15 -07:00
Roland Dreier
2be8e3ee8e IB/umad: Add P_Key index support
Add support for setting the P_Key index of sent MADs and getting the
P_Key index of received MADs.  This requires a change to the layout of
the ABI structure struct ib_user_mad_hdr, so to avoid breaking
compatibility, we default to the old (unchanged) ABI and add a new
ioctl IB_USER_MAD_ENABLE_PKEY that allows applications that are aware
of the new ABI to opt into using it.

We plan on switching to the new ABI by default in a year or so, and
this patch adds a warning that is printed when an application uses the
old ABI, to push people towards converting to the new ABI.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Hal Rosenstock <hal@xsigo.com>
2007-10-09 19:59:15 -07:00