Commit Graph

1063 Commits

Author SHA1 Message Date
Matan Barak 03db3a2d81 IB/core: Add RoCE GID table management
RoCE GIDs are based on IP addresses configured on Ethernet net-devices
which relate to the RDMA (RoCE) device port.

Currently, each of the low-level drivers that support RoCE (ocrdma,
mlx4) manages its own RoCE port GID table. As there's nothing which is
essentially vendor specific, we generalize that, and enhance the RDMA
core GID cache to do this job.

In order to populate the GID table, we listen for events:

(a) netdev up/down/change_addr events - if a netdev is built onto
    our RoCE device, we need to add/delete its IPs. This involves
    adding all GIDs related to this ndev, add default GIDs, etc.

(b) inet events - add new GIDs (according to the IP addresses)
    to the table.

For programming the port RoCE GID table, providers must implement
the add_gid and del_gid callbacks.

RoCE GID management requires us to state the associated net_device
alongside the GID. This information is necessary in order to manage
the GID table. For example, when a net_device is removed, its
associated GIDs need to be removed as well.

RoCE mandates generating a default GID for each port, based on the
related net-device's IPv6 link local. In contrast to the GID based on
the regular IPv6 link-local (as we generate GID per IP address),
the default GID is also available when the net device is down (in
order to support loopback).

Locking is done as follows:
The patch modify the GID table code both for new RoCE drivers
implementing the add_gid/del_gid callbacks and for current RoCE and
IB drivers that do not. The flows for updating the table are
different, so the locking requirements are too.

While updating RoCE GID table, protection against multiple writers is
achieved via mutex_lock(&table->lock). Since writing to a table
requires us to find an entry (possible a free entry) in the table and
then modify it, this mutex protects both the find_gid and write_gid
ensuring the atomicity of the action.
Each entry in the GID cache is protected by rwlock. In RoCE, writing
(usually results from netdev notifier) involves invoking the vendor's
add_gid and del_gid callbacks, which could sleep.
Therefore, an invalid flag is added for each entry. Updates for RoCE are
done via a workqueue, thus sleeping is permitted.

In IB, updates are done in write_lock_irq(&device->cache.lock), thus
write_gid isn't allowed to sleep and add_gid/del_gid are not called.

When passing net-device into/out-of the GID cache, the device
is always passed held (dev_hold).

The code uses a single work item for updating all RDMA devices,
following a netdev or inet notifier.

The patch moves the cache from being a client (which was incorrect,
as the cache is part of the IB infrastructure) to being explicitly
initialized/freed when a device is registered/removed.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 18:08:50 -04:00
Jason Gunthorpe 55aeed0654 IB/core: Make ib_alloc_device init the kobject
This gets rid of the weird in-between state where struct ib_device
was allocated but the kobject didn't work.

Consequently ib_device_release is now guaranteed to be called in
all situations and we needn't duplicate its kfrees on error paths.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 18:08:50 -04:00
Sagi Grimberg d9f272c523 IB/core: Drop ib_alloc_fast_reg_mr
Fully replaced by a more generic and suitable
ib_alloc_mr.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 18:08:49 -04:00
Sagi Grimberg 9bee178b4f IB: Modify ib_create_mr API
Use ib_alloc_mr with specific parameters.
Change the existing callers.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 18:08:44 -04:00
Sagi Grimberg 8b91ffc1cf IB/core: Get rid of redundant verb ib_destroy_mr
This was added in a thought of uniting all mr allocation
and deallocation routines but the fact is we have a single
deallocation routine already, ib_dereg_mr.

And, move mlx5_ib_destroy_mr specific logic into mlx5_ib_dereg_mr
(includes only signature stuff for now).

And, fixup the only callers (iser/isert) accordingly.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 18:08:44 -04:00
Haggai Eran be688195bd IB/cma: Fix net_dev reference leak with failed requests
When no matching listening ID is found for a given request, the net_dev
that was used to find the request isn't released.

Fixes: 0b3ca768fc ("IB/cma: Use found net_dev for passive connections")
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 18:08:28 -04:00
Haggai Eran 73fec7fd04 IB/cm: Remove compare_data checks
Now that there are no ib_cm clients using the compare_data feature for
matching IB CM requests' private data, remove the compare_data parameter of
ib_cm_listen and remove the code implementing the feature.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:24 -04:00
Haggai Eran 51efe394bc IB/cma: Share ib_cm_ids between rdma_cm_ids
Use ib_cm_insert_listen to create listening IB CM IDs or share existing
ones if needed. When given a request on a specific CM ID, the code now
matches the request to the RDMA CM ID based on the request parameters, so
it no longer needs to rely on the ib_cm's private data matching
capabilities.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:24 -04:00
Haggai Eran 0b3ca768fc IB/cma: Use found net_dev for passive connections
When receiving a new connection in cma_req_handler, we actually already
know the net_dev that is used for the connection's creation. Instead of
calling cma_translate_addr to resolve the new connection id's source
address, just use the net_dev that was found.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:24 -04:00
Haggai Eran f887f2ac87 IB/cma: Validate routing of incoming requests
Pass incoming request parameters through the relevant IPv4/IPv6 routing
tables and make sure the network stack is configured to handle such
requests.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:23 -04:00
Haggai Eran 4c21b5bcef IB/cma: Add net_dev and private data checks to RDMA CM
Instead of relying on a the ib_cm module to check an incoming CM request's
private data header, add these checks to the RDMA CM module. This allows a
following patch to to clean up the ib_cm interface and remove the code that
looks into the private headers. It will also allow supporting namespaces in
RDMA CM by making these checks namespace aware later on.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:23 -04:00
Haggai Eran 24cad9a7e8 IB/cm: Expose BTH P_Key in CM and SIDR request events
The rdma_cm module will later use the P_Key from the BTH to de-mux
requests.

See discussion at:
  http://www.spinics.net/lists/netdev/msg336067.html

Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Liran Liss <liranl@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:23 -04:00
Haggai Eran aac978e152 IB/cma: Helper functions to access port space IDRs
Add helper functions to access the IDRs by port-space and port number.

Pass around the port-space enum in cma.c instead of using pointers to
port-space IDRs.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Yotam Kenneth <yotamke@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:23 -04:00
Haggai Eran 0c505f70a2 IB/cma: Refactor RDMA IP CM private-data parsing code
When receiving a connection request, rdma_cm needs to associate the request
with a network device, in order to disambiguate requests. To do this, it
needs to know the request's destination IP. For this the module needs to
allow getting this information from the private data in the request packet,
instead of relying on the information already being in the listening RDMA
CM ID.

When creating a new incoming connection ID, the code in
cma_save_ip{4,6}_info can no longer rely on the listener's private data to
find the port number, so it reads it from the requested service ID.

Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Yotam Kenneth <yotamke@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:22 -04:00
Haggai Eran 067b171b86 IB/cm: Share listening CM IDs
Enabling network namespaces for RDMA CM will allow processes on different
namespaces to listen on the same port. In order to leave namespace support
out of the CM layer, this requires that multiple RDMA CM IDs will be able
to share a single CM ID.

This patch adds infrastructure to retrieve an existing listening ib_cm_id,
based on its device and service ID, or create a new one if one does not
already exist. It also adds a reference count for such instances
(cm_id_private.listen_sharecount), and prevents cm_destroy_id from
destroying a CM if it is still shared. See the relevant discussion [1].

[1] Re: [PATCH v3 for-next 05/13] IB/cm: Reference count ib_cm_ids
    http://www.spinics.net/lists/netdev/msg328860.html

Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:22 -04:00
Haggai Eran 15865e7dab IB/cm: Expose service ID in request events
Expose the service ID on an incoming CM or SIDR request to the event
handler. This will allow the RDMA CM module to de-multiplex connection
requests based on the information encoded in the service ID.

Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:22 -04:00
Yotam Kenneth 9268f72dcb IB/core: Find the network device matching connection parameters
In the case of IPoIB, and maybe in other cases, the network device is
managed by an upper-layer protocol (ULP). In order to expose this
network device to other users of the IB device, let ULPs implement
a callback that returns network device according to connection parameters.

The IB device and port, together with the P_Key and the GID should
be enough to uniquely identify the ULP net device. However, in current
kernels there can be multiple IPoIB interfaces created with the same GID.
Furthermore, such configuration may be desireable to support ipvlan-like
configurations for RDMA CM with IPoIB.  To resolve the device in these
cases the code will also take the IP address as an additional input.

Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Yotam Kenneth <yotamke@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:21 -04:00
Haggai Eran 7c1eb45a22 IB/core: lock client data with lists_rwsem
An ib_client callback that is called with the lists_rwsem locked only for
read is protected from changes to the IB client lists, but not from
ib_unregister_device() freeing its client data. This is because
ib_unregister_device() will remove the device from the device list with
lists_rwsem locked for write, but perform the rest of the cleanup,
including the call to remove() without that lock.

Mark client data that is undergoing de-registration with a new going_down
flag in the client data context. Lock the client data list with lists_rwsem
for write in addition to using the spinlock, so that functions calling the
callback would be able to lock only lists_rwsem for read and let callbacks
sleep.

Since ib_unregister_client() now marks the client data context, no need for
remove() to search the context again, so pass the client data directly to
remove() callbacks.

Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:21 -04:00
Haggai Eran 5aa44bb90f IB/core: Add rwsem to allow reading device list or client list
Currently the RDMA subsystem's device list and client list are protected by
a single mutex. This prevents adding user-facing APIs that iterate these
lists, since using them may cause a deadlock. The patch attempts to solve
this problem by adding a read-write semaphore to protect the lists. Readers
now don't need the mutex, and are safe just by read-locking the semaphore.

The ib_register_device, ib_register_client, ib_unregister_device, and
ib_unregister_client functions are modified to lock the semaphore for write
during their respective list modification. Also, in order to make sure
client callbacks are called only between add() and remove() calls, the code
is changed to only add items to the lists after the add() calls and remove
from the lists before the remove() calls.

This patch attempts to solve a similar need [1] that was seen in the RoCE
v2 patch series.

[1] http://www.spinics.net/lists/linux-rdma/msg24733.html

Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Matan Barak <matanb@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-30 15:48:15 -04:00
Spencer Baugh 6c26a77124 RDMA/cma: fix IPv6 address resolution
Resolving a link-local IPv6 address with an unspecified source address
was broken by commit 5462eddd7a, which prevented the IPv6 stack from
learning the scope id of the link-local IPv6 address, causing random
failures as the IP stack chose a random link to resolve the address on.

This commit 5462eddd7a made us bail out of cma_check_linklocal early if
the address passed in was not an IPv6 link-local address. On the address
resolution path, the address passed in is the source address; if the
source address is the unspecified address, which is not link-local, we
will bail out early.

This is mostly correct, but if the destination address is a link-local
address, then we will be following a link-local route, and we'll need to
tell the IPv6 stack what the scope id of the destination address is.
This used to be done by last line of cma_check_linklocal, which is
skipped when bailing out early:

	dev_addr->bound_dev_if = sin6->sin6_scope_id;

(In cma_bind_addr, the sin6_scope_id of the source address is set to the
sin6_scope_id of the destination address, so this is correct)
This line is required in turn for the following line, L279 of
addr6_resolve, to actually inform the IPv6 stack of the scope id:

      fl6.flowi6_oif = addr->bound_dev_if;

Since we can only know we are in this failure case when we have access
to both the source IPv6 address and destination IPv6 address, we have to
deal with this further up the stack. So detect this failure case in
cma_bind_addr, and set bound_dev_if to the destination address scope id
to correct it.

Signed-off-by: Spencer Baugh <sbaugh@catern.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-28 22:54:48 -04:00
Jason Gunthorpe 7e967fd0b8 IB/ucma: Fix theoretical user triggered use-after-free
Something like this:

CPU A                         CPU B
Acked-by: Sean Hefty <sean.hefty@intel.com>

========================      ================================
ucma_destroy_id()
 wait_for_completion()
                              .. anything
                                ucma_put_ctx()
                                  complete()
 .. continues ...
                              ucma_leave_multicast()
                               mutex_lock(mut)
                                 atomic_inc(ctx->ref)
                               mutex_unlock(mut)
 ucma_free_ctx()
  ucma_cleanup_multicast()
   mutex_lock(mut)
     kfree(mc)
                               rdma_leave_multicast(mc->ctx->cm_id,..

Fix it by latching the ref at 0. Once it goes to 0 mc and ctx cannot
leave the mutex(mut) protection.

The other atomic_inc in ucma_get_ctx is OK because mutex(mut) protects
it from racing with ucma_destroy_id.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-28 22:54:48 -04:00
Chuck Lever 1241d7bf2a core: Remove the ib_reg_phys_mr() and ib_rereg_phys_mr() verbs
The verbs are obsolete. The ib_rereg_phys_mr() verb is not used by
kernel ULPs, and the last ib_reg_phys_mr() call site in the kernel
tree has now been removed.

Two staging tree call sites remain in the Lustre client. The Lustre
team has been notified of the deprecation of reg_phys_mr.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2015-08-05 16:21:28 -04:00
Johannes Thumshirn 45d254206f IB/core: Destroy multcast_idr on module exit
Destroy multcast_idr on module exit, reclaiming the allocated memory.

This was detected by the following semantic patch (written by Luis Rodriguez
<mcgrof@suse.com>)
<SmPL>
@ defines_module_init @
declarer name module_init, module_exit;
declarer name DEFINE_IDR;
identifier init;
@@

module_init(init);

@ defines_module_exit @
identifier exit;
@@

module_exit(exit);

@ declares_idr depends on defines_module_init && defines_module_exit @
identifier idr;
@@

DEFINE_IDR(idr);

@ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
 ...
 idr_destroy(&idr);
 ...
}

@ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
 ...
 +idr_destroy(&idr);
}

</SmPL>

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:15 -04:00
Carol L Soto 59d40dd92c IB/ucm: Fix bitmap wrap when devnum > IB_UCM_MAX_DEVICES
ib_ucm_release_dev clears the wrong bit if devnum is greater
than IB_UCM_MAX_DEVICES.

Signed-off-by: Carol L Soto <clsoto@linux.vnet.ibm.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:12 -04:00
Haggai Eran 31b57b87fd IB/ucma: Fix lockdep warning in ucma_lock_files
The ucma_lock_files() locks the mut mutex on two files, e.g. for migrating
an ID. Use mutex_lock_nested() to prevent the warning below.

 =============================================
 [ INFO: possible recursive locking detected ]
 4.1.0-rc6-hmm+ #40 Tainted: G           O
 ---------------------------------------------
 pingpong_rpc_se/10260 is trying to acquire lock:
  (&file->mut){+.+.+.}, at: [<ffffffffa047ac55>] ucma_migrate_id+0xc5/0x248 [rdma_ucm]

 but task is already holding lock:
  (&file->mut){+.+.+.}, at: [<ffffffffa047ac4b>] ucma_migrate_id+0xbb/0x248 [rdma_ucm]

 other info that might help us debug this:
  Possible unsafe locking scenario:

        CPU0
        ----
   lock(&file->mut);
   lock(&file->mut);

  *** DEADLOCK ***

  May be due to missing lock nesting notation

 1 lock held by pingpong_rpc_se/10260:
  #0:  (&file->mut){+.+.+.}, at: [<ffffffffa047ac4b>] ucma_migrate_id+0xbb/0x248 [rdma_ucm]

 stack backtrace:
 CPU: 0 PID: 10260 Comm: pingpong_rpc_se Tainted: G           O    4.1.0-rc6-hmm+ #40
 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
  ffff8801f85b63d0 ffff880195677b58 ffffffff81668f49 0000000000000001
  ffffffff825cbbe0 ffff880195677c38 ffffffff810bb991 ffff880100000000
  ffff880100000000 ffff880100000001 ffff8801f85b7010 ffffffff8121bee9
 Call Trace:
  [<ffffffff81668f49>] dump_stack+0x4f/0x6e
  [<ffffffff810bb991>] __lock_acquire+0x741/0x1820
  [<ffffffff8121bee9>] ? dput+0x29/0x320
  [<ffffffff810bcb38>] lock_acquire+0xc8/0x240
  [<ffffffffa047ac55>] ? ucma_migrate_id+0xc5/0x248 [rdma_ucm]
  [<ffffffff8166b901>] ? mutex_lock_nested+0x291/0x3e0
  [<ffffffff8166b6d5>] mutex_lock_nested+0x65/0x3e0
  [<ffffffffa047ac55>] ? ucma_migrate_id+0xc5/0x248 [rdma_ucm]
  [<ffffffff810baeed>] ? trace_hardirqs_on+0xd/0x10
  [<ffffffff8166b66e>] ? mutex_unlock+0xe/0x10
  [<ffffffffa047ac55>] ucma_migrate_id+0xc5/0x248 [rdma_ucm]
  [<ffffffffa0478474>] ucma_write+0xa4/0xb0 [rdma_ucm]
  [<ffffffff81200674>] __vfs_write+0x34/0x100
  [<ffffffff8112427c>] ? __audit_syscall_entry+0xac/0x110
  [<ffffffff810ec055>] ? current_kernel_time+0xc5/0xe0
  [<ffffffff812aa4d3>] ? security_file_permission+0x23/0x90
  [<ffffffff8120088d>] ? rw_verify_area+0x5d/0xe0
  [<ffffffff812009bb>] vfs_write+0xab/0x120
  [<ffffffff81201519>] SyS_write+0x59/0xd0
  [<ffffffff8112427c>] ? __audit_syscall_entry+0xac/0x110
  [<ffffffff8166ffee>] system_call_fastpath+0x12/0x76

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:12 -04:00
Tatyana Nikolova a7f2f24cd7 RDMA/core: Fixes for port mapper client registration
Fixes to allow clients to make remove mapping requests, after
they have provided the user space service with the mapping
information, they are using when the service is restarted.

1) Adding IWPM_REG_VALID, IWPM_REG_INCOMPL and IWPM_REG_UNDEF
   registration types for the port mapper clients and functions
   to set/check the registration type.
2) If the port mapper user space service is not available to register
   the client, then its registration stays IWPM_REG_UNDEF and the
   registration isn't checked until the service becomes available
   (no mappings are possible, if the user space service isn't running).
3) After the service is restarted, the user space port mapper pid is set
   to valid and the client registration is set to IWPM_REG_INCOMPL
   to allow the client to make remove mapping requests.

Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:10 -04:00
Erez Shitrit be4b499323 IB/cm: Do not queue work to a device that's going away
Whenever ib_cm gets remove_one call, like when there is a hot-unplug
event, the driver should mark itself as going_down and confirm that no
new works are going to be queued for that device.
so, the order of the actions are:
1. mark the going_down bit.
2. flush the wq.
3. [make sure no new works for that device.]
4. unregister mad agent.

otherwise, works that are already queued can be scheduled after the mad
agent was freed.

Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:09 -04:00
Ira Weiny cd4cd565e0 IB/mad: Fix compare between big endian and cpu endian
The define OPA_LID_PERMISSIVE is big endian and was compared to the
cpu endian variable opa_drslid.

Problem caught by 0-day build infrastructure.

Fixes: 8e4349d13f (IB/mad: Add final OPA MAD processing)
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: John, Jubin <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:08 -04:00
Hal Rosenstock 4139032b48 IB: Add rdma_cap_ib_switch helper and use where appropriate
Persuant to Liran's comments on node_type on linux-rdma
mailing list:

In an effort to reform the RDMA core and ULPs to minimize use of
node_type in struct ib_device, an additional bit is added to
struct ib_device for is_switch (IB switch). This is needed
to be initialized by any IB switch device driver. This is a
NEW requirement on such device drivers which are all
"out of tree".

In addition, an ib_switch helper was added to ib_verbs.h
based on the is_switch device bit rather than node_type
(although those should be consistent).

The RDMA core (MAD, SMI, agent, sa_query, multicast, sysfs)
as well as (IPoIB and SRP) ULPs are updated where
appropriate to use this new helper. In some cases,
the helper is now used under the covers of using
rdma_[start end]_port rather than the open coding
previously used.

Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-07-14 13:20:08 -04:00
Linus Torvalds f9d1b5a31a Changes for 4.2
- A large cleanup of how device capabilities are checked for various
   features
 - Additional cleanups in the MAD processing
 - Update to the srp driver
 - Creation and use of centralized log message helpers
 - Add const to a number of args to calls and clean up call chain
 - Add support for extended cq create verb
 - Add support for timestamps on cq completion
 - Add support for processing OPA MAD packets
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma updates from Doug Ledford:

 - a large cleanup of how device capabilities are checked for various
   features

 - additional cleanups in the MAD processing

 - update to the srp driver

 - creation and use of centralized log message helpers

 - add const to a number of args to calls and clean up call chain

 - add support for extended cq create verb

 - add support for timestamps on cq completion

 - add support for processing OPA MAD packets

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (92 commits)
  IB/mad: Add final OPA MAD processing
  IB/mad: Add partial Intel OPA MAD support
  IB/mad: Add partial Intel OPA MAD support
  IB/core: Add OPA MAD core capability flag
  IB/mad: Add support for additional MAD info to/from drivers
  IB/mad: Convert allocations from kmem_cache to kzalloc
  IB/core: Add ability for drivers to report an alternate MAD size.
  IB/mad: Support alternate Base Versions when creating MADs
  IB/mad: Create a generic helper for DR forwarding checks
  IB/mad: Create a generic helper for DR SMP Recv processing
  IB/mad: Create a generic helper for DR SMP Send processing
  IB/mad: Split IB SMI handling from MAD Recv handler
  IB/mad cleanup: Generalize processing of MAD data
  IB/mad cleanup: Clean up function params -- find_mad_agent
  IB/mlx4: Add support for CQ time-stamping
  IB/mlx4: Add mmap call to map the hardware clock
  IB/core: Pass hardware specific data in query_device
  IB/core: Add timestamp_mask and hca_core_clock to query_device
  IB/core: Extend ib_uverbs_create_cq
  IB/core: Add CQ creation time-stamping flag
  ...
2015-06-23 15:53:26 -07:00
Ira Weiny 8e4349d13f IB/mad: Add final OPA MAD processing
For devices which support OPA MADs

   1) Use previously defined SMP support functions.

   2) Pass correct base version to ib_create_send_mad when processing OPA MADs.

   3) Process out_mad_key_index returned by agents for a response.  This is
      necessary because OPA SMP packets must carry a valid pkey.

   4) Carry the correct segment size (OPA vs IBTA) of RMPP messages within
      ib_mad_recv_wc.

   5) Handle variable length OPA MADs by:

        * Adjusting the 'fake' WC for locally routed SMP's to represent the
          proper incoming byte_len
        * out_mad_size is used from the local HCA agents
                1) when sending agent responses on the wire
                2) when passing responses through the local_completions
		   function

	NOTE: wc.byte_len includes the GRH length and therefore is different
	      from the in_mad_size specified to the local HCA agents.
	      out_mad_size should _not_ include the GRH length as it is added

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:18 -04:00
Ira Weiny f28990bc89 IB/mad: Add partial Intel OPA MAD support
Add OPA SMP processing functionality.

Define the new OPA SMP format, create support functions for this format using
the previously defined helper functions as appropriate.

These functions are defined in this patch and used in the final OPA MAD support
patch.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny 548ead1744 IB/mad: Add partial Intel OPA MAD support
This patch is the first of 3 which adds processing of OPA MADs

1) Add Intel Omni-Path Architecture defines
2) Increase max management version to accommodate OPA
3) update ib_create_send_mad
	If the device supports OPA MADs and the MAD being sent is the OPA base
	version alter the MAD size and sg lengths as appropriate

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny 4cd7c9479a IB/mad: Add support for additional MAD info to/from drivers
In order to support alternate sized MADs (and variable sized MADs on OPA
devices) add in/out MAD size parameters to the process_mad core call.

In addition, add an out_mad_pkey_index to communicate the pkey index the driver
wishes the MAD stack to use when sending OPA MAD responses.

The out MAD size and the out MAD PKey index are required by the MAD
stack to generate responses on OPA devices.

Furthermore, the in and out MAD parameters are made generic by specifying them
as ib_mad_hdr rather than ib_mad.

Drivers are modified as needed and are protected by BUG_ON flags if the MAD
sizes passed to them is incorrect.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny c9082e51b6 IB/mad: Convert allocations from kmem_cache to kzalloc
This patch implements allocating alternate receive MAD buffers within the MAD
stack.  Support for OPA to send/recv variable sized MADs is implemented later.

    1) Convert MAD allocations from kmem_cache to kzalloc

       kzalloc is more flexible to support devices with different sized MADs
       and research and testing showed that the current use of kmem_cache does
       not provide performance benefits over kzalloc.

    2) Change struct ib_mad_private to use a flex array for the mad data
    3) Allocate ib_mad_private based on the size specified by devices in
       rdma_max_mad_size.
    4) Carry the allocated size in ib_mad_private to be used when processing
       ib_mad_private objects.
    5) Alter DMA mappings based on the mad_size of ib_mad_private.
    6) Replace the use of sizeof and static defines as appropriate
    7) Add appropriate casts for the MAD data when calling processing
       functions.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny 337877a466 IB/core: Add ability for drivers to report an alternate MAD size.
Add max MAD size to the device immutable data set and have all drivers that
support MADs report the current IB MAD size (IB_MGMT_MAD_SIZE) to the core.

Verify MAD size data in both the MAD core and when reading the immutable data.

OPA drivers will report alternate MAD sizes in subsequent patches.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny da2dfaa3a3 IB/mad: Support alternate Base Versions when creating MADs
In preparation to support the new OPA MAD Base version, add a base version
parameter to ib_create_send_mad and set it to IB_MGMT_BASE_VERSION for current
users.

Definition of the new base version and it's processing will occur in later
patches.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny 29869eafa6 IB/mad: Create a generic helper for DR forwarding checks
IB and OPA SMPs share the same processing algorithm but have different header
formats and permissive LID detection.

Add a helper function which is generic to processing the DR forwarding checks which
can be used by both IB and OPA SMP code.

Use this function in the current IB function smi_check_forward_dr_smp.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:16 -04:00
Ira Weiny 86f0e67a21 IB/mad: Create a generic helper for DR SMP Recv processing
IB and OPA SMPs share the same processing algorithm but have different header
formats and permissive LID detection.

Add a helper function which is generic to processing DR SMP Recv messages which
can be used by both IB and OPA SMP code.

Use this function in the current IB function smi_handle_dr_smp_recv.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:16 -04:00
Ira Weiny 92f1505604 IB/mad: Create a generic helper for DR SMP Send processing
IB and OPA SMPs share the same processing algorithm but have different header
formats and permissive LID detection.

Add a helper function which is generic to processing DR SMP Send messages which
can be used by both IB and OPA SMP code.

Use this function in the current IB function smi_handle_dr_smp_send.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:16 -04:00
Ira Weiny e11ae8aa0c IB/mad: Split IB SMI handling from MAD Recv handler
Make a helper function to process Directed Route SMPs to be called by the IB
MAD Recv Handler, ib_mad_recv_done_handler.

This cleans up the MAD receive handler code a bit and allows for us to better
share the SMP processing code between IB and OPA SMPs.

IB and OPA SMPs share the same processing algorithm but have different header
formats and permissive LID detection.  Therefore this and subsequent patches
split the common processing code from the IB specific code in anticipation of
sharing those algorithms with the OPA code.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:16 -04:00
Ira Weiny 83a1d22889 IB/mad cleanup: Generalize processing of MAD data
ib_find_send_mad only needs access to the MAD header not the full IB MAD.
Change the local variable to ib_mad_hdr and change the corresponding cast.

This allows for clean usage of this function with both IB and OPA MADs because
OPA MADs carry the same header as IB MADs.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:16 -04:00
Ira Weiny d94bd2667a IB/mad cleanup: Clean up function params -- find_mad_agent
find_mad_agent only needs read only access to the MAD header.  Update the
ib_mad pointer to be const ib_mad_hdr.  Adjust call tree.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:16 -04:00
Matan Barak 2528e33e68 IB/core: Pass hardware specific data in query_device
Vendors should be able to pass vendor specific data to/from
user-space via query_device uverb. In order to do this,
we need to pass the vendors' specific udata.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:10 -04:00
Matan Barak 24306dc661 IB/core: Add timestamp_mask and hca_core_clock to query_device
In order to expose timestamp we need to expose two new attributes in
query_device to be used for CQ completion time-stamping:

timestamp_mask - how many bits are valid in the timestamp, where timestamp
values could be 64bits the most.

hca_core_clock - timestamp is given in HW cycles, the frequency in KHZ units
of the HCA, necessary in order to convert cycles to seconds.

This is added both to ib_query_device and its respective uverbs counterpart.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:10 -04:00
Matan Barak 565197dd8f IB/core: Extend ib_uverbs_create_cq
ib_uverbs_ex_create_cq follows the extension verbs
mechanism. New features (for example, CQ creation flags
field which is added in a downstream patch) could used
via user-space libraries without breaking the ABI.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:10 -04:00
Matan Barak 8e37210b38 IB/core: Change ib_create_cq to use struct ib_cq_init_attr
Currently, ib_create_cq uses cqe and comp_vecotr instead
of the extendible ib_cq_init_attr struct.

Earlier patches already changed the vendors to work with
ib_cq_init_attr. This patch changes the consumers too.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:10 -04:00
Matan Barak bcf4c1ea58 IB/core: Change provider's API of create_cq to be extendible
Add a new ib_cq_init_attr structure which contains the
previous cqe (minimum number of CQ entries) and comp_vector
(completion vector) in addition to a new flags field.
All vendors' create_cq callbacks are changed in order
to work with the new API.

This commit does not change any functionality.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-By: Devesh Sharma <devesh.sharma@avagotech.com> to patch #2
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:10 -04:00
Moni Shoua 9247a8eba6 IB/core: Don't warn on no SA support in event handler
Registering an event handler is done for a device. This device may have
one RoCE port (no SA cap) and one InfiniBand port (has SA cap).
Therefore, warning from the event handler about a specific port that
doesn't have SA cap is correct but pollutes the kernel log without a
need.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-10 23:54:34 -04:00
Doug Ledford b806ef3bbe Merge branch 'for-4.2-misc' into k.o/for-4.2 2015-06-02 09:33:22 -04:00
Ira Weiny 73cdaaeed1 IB/core cleanup: Add const to args - agent_send_response
In order to support constant callers of agent_send_response we add const
specifiers to the its pointer arguments.

Adjust the call tree accordingly.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-02 09:33:13 -04:00
Steve Wise 68cdba068d RDMA/iw_cm: Export tos field to iwarp providers
rdma-cma/iw_cm: Export tos field to iwarp providers

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-02 09:22:30 -04:00
Matthew Finlay c07678bb01 IB/cma: Fix broken AF_IB UD support
Support for using UD and AF_IB is currently broken.  The
IB_CM_SIDR_REQ_RECEIVED message is not handled properly in
cma_save_net_info() and we end up falling into code that will try and
process the request as ipv4/ipv6, which will end up failing.

The resolution is to add a check for the SIDR_REQ and call
cma_save_ib_info() with a NULL path record.  Change cma_save_ib_info()
to copy the src sib info from the listen_id when the path record is NULL.

Reported-by: Hari Shankar <Hari.Shankar@netapp.com>
Signed-off-by: Matt Finlay <matt@mellanox.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 16:15:56 -04:00
Doug Ledford 175e8efe69 Merge branches 'bart-srp', 'generic-errors', 'ira-cleanups' and 'mwang-v8' into k.o/for-4.2 2015-05-20 16:12:40 -04:00
Ira Weiny 5d9fb04406 IB/core: Change rdma_protocol_iboe to roce
After discussion upstream, it was agreed to transition the usage of iboe
in the kernel to roce.  This keeps our terminology consistent with what
was finalized in the IBTA Annex 16 and IBTA Annex 17 publications.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 15:58:19 -04:00
Ted Kim c29ed5a456 ib/cm: Change reject message type when destroying cm_id
Problem reported by: Ted Kim <ted.h.kim@oracle.com>:

We have a case where a Linux system and a non-Linux system are
trying to interoperate.  The Linux host is the active side and
starts the connection establishment, but later decides to not go
through with the connection setup and does rdma_destroy_id().

The rdma_destroy_id() eventually works its way down to cm_destroy_id()
in core/cm.c, where a REJ is sent. The non-Linux system
has some trouble recognizing the REJ because of:

A. CM states which can't receive the REJ
B. Some issues about REJ formatting (missing comm ID)

ISSUE A: That part of the spec says, a Consumer Reject REJ can be
sent for a connection abort, but it goes further
and says: can send a REJ message with a "Consumer Reject"
Reason code if they are in a CM state (i.e. REP
Rcvd, MRA(REP) Sent, REQ Rcvd, MRA Sent) that allows
a REJ to be sent (lines 35-38).

Of the states listed there in that sentence, it would
seem to limit the active side to using the Consumer Reject
(for the abort case) in just the REP-Rcvd and MRA-REP-Sent
states. That is basically only after the active side
sees a REP (or alternatively goes down the state transitions
to timeout in which case a Timeout REJ is sent).

As a fix, in cm-destroy-id() move the IB-CM-MRA-REQ-RCVD case
to the same as REQ-SENT.  Essentially, make a REJ sent after
getting an MRA on active side a timeout rather than Consumer-
Reject, which is arguably more correct with the CM state
diagrams previous to getting a REP.

Signed-off-by: Ted Kim <ted.h.kim@oracle.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
2015-05-20 12:41:38 -04:00
Ira Weiny f9b22e355d IB/core: Convert core to use bitfield for caps
Remove query_protocol callback

Use the new Core Capability bits for:

rdma_protocol_*
rdma_cap_ib_mad
rdma_cap_ib_smi
rdma_cap_ib_cm
rdma_cap_iw_cm
rdma_cap_ib_sa
rdma_cap_ib_mcast
rdma_cap_af_ib
rdma_cap_eth_ah

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:38:43 -04:00
Ira Weiny 7738613e7c IB/core: Add per port immutable struct to ib_device
As of commit 5eb620c81c "IB/core: Add helpers for uncached GID and P_Key
searches"; pkey_tbl_len and gid_tbl_len are immutable data which are stored in
the ib_device.

The per port core capability flags to be added later are also immutable data to
be stored in the ib_device object.

In preparation for this create a structure for per port immutable data and
place the pkey and gid table lengths within this structure.

"get_port_immutable" is added as a mandatory device function to allow the
drivers to fill in this data.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:38:13 -04:00
Ira Weiny 26c454288a IB/user_mad: Fix buggy usage of port index
The addition of the rdma_cap_ib_mad is technically broken in ib_umad_remove_one
because the loop "i" value is not a port value.

This bug resulted in the ib_umad failing to properly remove its resources when
the core capability functions were converted to bit fields.

NOTE: e17371d73908 did not result in broken behavior on its own.  It was only
an issue when the implementation of rdma_cap_ib_mad was changed.

Pass the port value to rdma_cap_ib_mad.

Fixes: e17371d73908 ("IB/Verbs: Use management helper rdma_cap_ib_mad()")

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:37:34 -04:00
Ira Weiny ab8be619b8 IB/user_mad: Use new start/end port functions
Use the new common rdma_[start|end]_port functions instead of using
local variables and figuring it out on the fly.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:36:17 -04:00
Ira Weiny f766c58fa3 IB/mad: Add const qualifiers to query only functions
The following functions only need read access to the data passed to them.

ib_mad_kernel_rmpp_agent
is_rmpp_data_mad
rcv_has_same_gid
ib_find_send_mad

Clarify with const specifiers

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:34:45 -04:00
Ira Weiny 8bf4b30c24 IB/mad: Clean up rcv_has_same_class
rcv_has_same_class only needs access to the MAD header
specify WR and Receive WC as const

Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:34:45 -04:00
Ira Weiny 9690930854 IB/mad: Change ib_response_mad signature arguments
ib_response_mad only needs read access to the MAD header, not write access
to the entire mad struct, so replace struct ib_mad with const struct
ib_mad_hdr

Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:34:10 -04:00
Ira Weiny 77f60833b8 IB/mad: Change validate_mad signature arguments
validate_mad only needs read access to the MAD header, not write access
to the entire mad struct, so replace struct ib_mad with const struct
ib_mad_hdr

Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20 12:32:58 -04:00
Sagi Grimberg 2b1b5b6012 IB/core, cma: Nice log-friendly string helpers
Some of us keep revisiting the code to decode enumerations that
appear in out logs. Let's borrow the nice logging helpers that
exists in xprtrdma and rds for CMA events, IB events and WC statuses.

Reviewd-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:43:52 -04:00
Ira Weiny b78d28a2af IB/mad: Clean up comments in smi.c
Return values of 0 do not make sense for functions which return enum
smi_action

Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:24 -04:00
Ira Weiny c597eee506 IB/mad: Rename is_data_mad to is_rmpp_data_mad
is_rmpp_data_mad is more descriptive for this function.

Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:24 -04:00
Ira Weiny 0cf18d7723 IB/core: Create common start/end port functions
Previously start_port and end_port were defined in 2 places, cache.c and
device.c and this prevented their use in other modules.

Make these common functions, change the name to reflect the rdma
name space, and update existing users.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:06 -04:00
Michael Wang 227128fc68 IB/Verbs: Use management helper rdma_cap_eth_ah()
Introduce helper rdma_cap_eth_ah() to help us check if the port of an
IB device support Ethernet Address Handler.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:06 -04:00
Michael Wang 30a74ef41d IB/Verbs: Use management helper rdma_cap_af_ib()
Introduce helper rdma_cap_af_ib() to help us check if the port of an
IB device support Native Infiniband Address.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang a31ad3b0e3 IB/Verbs: Use management helper rdma_cap_ib_mcast()
Introduce helper rdma_cap_ib_mcast() to help us check if the port of an
IB device support Infiniband Multicast.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang fe53ba2f0c IB/Verbs: Use management helper rdma_cap_ib_sa()
Introduce helper rdma_cap_ib_sa() to help us check if the port of an
IB device support Infiniband Subnet Administration.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang 042153306d IB/Verbs: Use management helper rdma_cap_iw_cm()
Introduce helper rdma_cap_iw_cm() to help us check if the port of an
IB device support IWARP Communication Manager.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang 72219cea8e IB/Verbs: Use management helper rdma_cap_ib_cm()
Introduce helper rdma_cap_ib_cm() to help us check if the port of an
IB device support Infiniband Communication Manager.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang 29541e3add IB/Verbs: Use management helper rdma_cap_ib_smi()
Introduce helper rdma_cap_ib_smi() to help us check if the port of an
IB device support Infiniband Subnet Management Interface.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang c757dea816 IB/Verbs: Use management helper rdma_cap_ib_mad()
Introduce helper rdma_cap_ib_mad() to help us check if the port of an
IB device support Infiniband Management Datagrams.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang fef60902ef IB/Verbs: Reform rest part in IB-core cma
Use raw management helpers to reform rest part in IB-core cma.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang 7c11147da2 IB/Verbs: Reform cma_acquire_dev()
Reform cma_acquire_dev() with management helpers, introduce
cma_validate_port() to make the code more clean.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:05 -04:00
Michael Wang 5c9a52828a IB/Verbs: Reform mcast related part in IB-core cma
Use raw management helpers to reform mcast related part in IB-core cma.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang c72f21893e IB/Verbs: Reform route related part in IB-core cma
Use raw management helpers to reform route related part in IB-core cma.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 21655afc62 IB/Verbs: Reform cm related part in IB-core cma/ucm
Use raw management helpers to reform cm related part in IB-core cma/ucm.

Few checks focus on the device cm type rather than the port capability,
directly pass port 1 works currently, but can't support mixing cm type
device in future.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 55045b2577 IB/Verbs: Reform IB-core verbs
Use raw management helpers to reform IB-core verbs

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 613466cb7f IB/Verbs: Reform IB-core multicast
Use raw management helpers to reform IB-core multicast.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 08e3681ab8 IB/Verbs: Reform IB-core sa_query
Use raw management helpers to reform IB-core sa_query.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 091e6a4c42 IB/Verbs: Reform IB-core cm
Use raw management helpers to reform IB-core cm.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 827f2a8b0a IB/Verbs: Reform IB-core mad/agent/user_mad
Use raw management helpers to reform IB-core mad/agent/user_mad.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:04 -04:00
Michael Wang 6b90a6d66b IB/Verbs: Implement new callback query_protocol()
Add new callback query_protocol() and implement for each HW.

Mapping List:
		node-type	link-layer	transport	protocol
nes		RNIC		ETH		IWARP		IWARP
amso1100	RNIC		ETH		IWARP		IWARP
cxgb3   	RNIC		ETH		IWARP		IWARP
cxgb4   	RNIC		ETH		IWARP		IWARP
usnic   	USNIC_UDP	ETH		USNIC_UDP	USNIC_UDP
ocrdma  	IB_CA		ETH		IB		IBOE
mlx4    	IB_CA		IB/ETH		IB		IB/IBOE
mlx5    	IB_CA		IB		IB		IB
ehca    	IB_CA		IB		IB		IB
ipath   	IB_CA		IB		IB		IB
mthca   	IB_CA		IB		IB		IB
qib     	IB_CA		IB		IB		IB

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-18 13:35:03 -04:00
Tatyana Nikolova ec04847c0c RDMA/core: Fix for parsing netlink string attribute
The string iwpm_ulib_name is recorded in a nlmsg as a netlink attribute.
Without this fix parsing of the nlmsg by the userspace port mapper service fails
because of unknown attribute length, causing the port mapper service not to
register the client, which has sent the nlmsg.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Cc: <stable@vger.kernel.org> #v3.16
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-12 13:03:04 -04:00
David Ahern 0d0f738f6a IB/core: Fix unaligned accesses
Addresses the following kernel logs seen during boot of sparc systems:

Kernel unaligned access at TPC[103bce50] cm_find_listen+0x34/0xf8 [ib_cm]
Kernel unaligned access at TPC[103bce50] cm_find_listen+0x34/0xf8 [ib_cm]
Kernel unaligned access at TPC[103bce50] cm_find_listen+0x34/0xf8 [ib_cm]
Kernel unaligned access at TPC[103bce50] cm_find_listen+0x34/0xf8 [ib_cm]
Kernel unaligned access at TPC[103bce50] cm_find_listen+0x34/0xf8 [ib_cm]

Signed-off-by: David Ahern <david.ahern@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 13:21:27 -04:00
Honggang LI 471e705832 IB/core: change rdma_gid2ip into void function as it always return zero
Signed-off-by: Honggang Li <honli@redhat.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 13:21:27 -04:00
Guy Shapiro 325ad0617a IB/core: dma unmap optimizations
While unmapping an ODP writable page, the dirty bit of the page is set. In
order to do so, the head of the compound page is found.
Currently, the compound head is found even on non-writable pages, where it is
never used, leading to unnecessary cpu barrier that impacts performance.

This patch moves the search for the compound head to be done only when needed.

Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Acked-by: Shachar Raindel <raindel@mellanox.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 09:18:02 -04:00
Guy Shapiro c1d383b578 IB/core: dma map/unmap locking optimizations
Currently, while mapping or unmapping pages for ODP, the umem mutex is locked
and unlocked once for each page. Such lock/unlock operation take few tens to
hundreds of nsecs. This makes a significant impact when mapping or unmapping few
MBs of memory.

To avoid this, the mutex should be locked only once per operation, and not per
page.

Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Acked-by: Shachar Raindel <raindel@mellanox.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 09:18:02 -04:00
Tatyana Nikolova 6eec177461 RDMA/core: Enable the iWarp Port Mapper to provide the actual address of the connecting peer to its clients
Add functionality to enable the port mapper on the passive side to provide to its
clients the actual (non-mapped) ip/tcp address information of the connecting peer

1) Adding remote_info_cb() to process the address info of the connecting peer
   The address info is provided by the user space port mapper service when
   the connection is initiated by the peer
2) Adding a hash list to store the remote address info
3) Adding functionality to add/remove the remote address info
   After the info has been provided to the port mapper client,
   it is removed from the hash list

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 09:18:01 -04:00
Jason Gunthorpe 285214409a RDMA/CMA: Canonize IPv4 on IPV6 sockets properly
When accepting a new IPv4 connect to an IPv6 socket, the CMA tries to
canonize the address family to IPv4, but does not properly process
the listening sockaddr to get the listening port, and does not properly
set the address family of the canonized sockaddr.

Fixes: e51060f08a ("IB: IP address based RDMA connection manager")

Cc: <stable@vger.kernel.org>
Reported-By: Yotam Kenneth <yotamke@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 09:18:01 -04:00
Doug Ledford c1c2fef6cf Merge branches 'cve-fixup', 'ipoib', 'iser', 'misc-4.1', 'or-mlx4' and 'srp' into for-4.1 2015-04-15 16:24:49 -04:00
Sébastien Dugué a233c4b54c ib_uverbs: Fix pages leak when using XRC SRQs
Hello,

  When an application using XRCs abruptly terminates, the mmaped pages
of the CQ buffers are leaked.

  This comes from the fact that when resources are released in
ib_uverbs_cleanup_ucontext(), we fail to release the CQs because their
refcount is not 0.

  When creating an XRC SRQ, we increment the associated CQ refcount.
This refcount is only decremented when the SRQ is released.

  Therefore we need to release the SRQs prior to the CQs to make sure
that all references to the CQs are gone before trying to release these.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-04-15 16:06:39 -04:00
Yann Droneaud 66578b0b2f IB/core: don't disallow registering region starting at 0x0
In a call to ib_umem_get(), if address is 0x0 and size is
already page aligned, check added in commit 8494057ab5
("IB/uverbs: Prevent integer overflow in ib_umem_get address
arithmetic") will refuse to register a memory region that
could otherwise be valid (provided vm.mmap_min_addr sysctl
and mmap_low_allowed SELinux knobs allow userspace to map
something at address 0x0).

This patch allows back such registration: ib_umem_get()
should probably don't care of the base address provided it
can be pinned with get_user_pages().

There's two possible overflows, in (addr + size) and in
PAGE_ALIGN(addr + size), this patch keep ensuring none
of them happen while allowing to pin memory at address
0x0. Anyway, the case of size equal 0 is no more (partially)
handled as 0-length memory region are disallowed by an
earlier check.

Link: http://mid.gmane.org/cover.1428929103.git.ydroneaud@opteya.com
Cc: <stable@vger.kernel.org> # 8494057ab5 ("IB/uverbs: Prevent integer overflow in ib_umem_get address arithmetic")
Cc: Shachar Raindel <raindel@mellanox.com>
Cc: Jack Morgenstein <jackm@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-04-15 16:05:02 -04:00
Yann Droneaud 8abaae62f3 IB/core: disallow registering 0-sized memory region
If ib_umem_get() is called with a size equal to 0 and an
non-page aligned address, one page will be pinned and a
0-sized umem will be returned to the caller.

This should not be allowed: it's not expected for a memory
region to have a size equal to 0.

This patch adds a check to explicitly refuse to register
a 0-sized region.

Link: http://mid.gmane.org/cover.1428929103.git.ydroneaud@opteya.com
Cc: <stable@vger.kernel.org>
Cc: Shachar Raindel <raindel@mellanox.com>
Cc: Jack Morgenstein <jackm@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-04-15 16:05:02 -04:00
Shachar Raindel 8494057ab5 IB/uverbs: Prevent integer overflow in ib_umem_get address arithmetic
Properly verify that the resulting page aligned end address is larger
than both the start address and the length of the memory area requested.

Both the start and length arguments for ib_umem_get are controlled by
the user. A misbehaving user can provide values which will cause an
integer overflow when calculating the page aligned end address.

This overflow can cause also miscalculation of the number of pages
mapped, and additional logic issues.

Addresses: CVE-2014-8159
Cc: <stable@vger.kernel.org>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-04-02 09:53:59 -07:00
Roland Dreier 147d1da951 Merge branches 'core', 'cxgb4', 'iser', 'mlx4', 'mlx5', 'ocrdma', 'odp', 'qib' and 'srp' into for-next 2015-02-20 09:04:40 -08:00
Haggai Eran f4056bfd8c IB/core: Add on demand paging caps to ib_uverbs_ex_query_device
Add on-demand paging capabilities reporting to the extended query device verb.

Yann Droneaud writes:

    Note: as offsetof() is used to retrieve the size of the lower chunk
    of the response, beware that it only works if the upper chunk
    is right after, without any implicit padding. And, as the size of
    the latter chunk is added to the base size, implicit padding at the
    end of the structure is not taken in account. Both point must be
    taken in account when extending the uverbs functionalities.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-18 08:36:26 -08:00
Eli Cohen 02d1aa7af1 IB/core: Add support for extended query device caps
Add extensible query device capabilities verb to allow adding new features.
ib_uverbs_ex_query_device is added and copy_query_dev_fields is used to copy
capability fields to be used by both ib_uverbs_query_device and
ib_uverbs_ex_query_device.

Following the discussion about this patch [1], the code now validates
the command's comp_mask is zero, returning -EINVAL for unknown values,
in order to allow extending the verb in the future.

The verb also checks the user-space provided response buffer size and
only fills in capabilities that will fit in the buffer. In attempt to
follow the spirit of presentation [2] by Tzahi Oved that was presented
during OpenFabrics Alliance International Developer Workshop 2013, the
comp_mask bits will only describe which fields are valid.  Furthermore,
fields that can simply be cleared when they are not supported, do not
require a comp_mask bit at all.  The verb returns a response_length
field containing the actual number of bytes written by the kernel, so
that a newer version running on an older kernel can tell which fields
were actually returned.

[1] [PATCH v1 0/5] IB/core: extended query device caps cleanup for v3.19
    http://thread.gmane.org/gmane.linux.kernel.api/7889/

[2] https://www.openfabrics.org/images/docs/2013_Dev_Workshop/Tues_0423/2013_Workshop_Tues_0830_Tzahi_Oved-verbs_extensions_ofa_2013-tzahio.pdf

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-18 08:36:26 -08:00
Haggai Eran 4fc701ead7 IB/core: Properly handle registration of on-demand paging MRs after dereg
When the last on-demand paging MR is released the notifier count is
left non-zero so that concurrent page faults will have to abort. If a
new MR is then registered, the counter is reset. However, the decision
is made to put the new MR in the list waiting for the notifier count
to reach zero, before the counter is reset. An invalidation or another
MR registration can release the MR to handle page faults, but without
such an event the MR can wait forever.

The patch fixes this issue by adding a check whether the MR is the
first on-demand paging MR when deciding whether it is ready to handle
page faults. If it is the first MR, we know that there are no mmu
notifiers running in parallel to the registration.

Fixes: 882214e2b1 ("IB/core: Implement support for MMU notifiers regarding on demand paging regions")
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-17 22:14:56 -08:00
Moshe Lazer 0fb8bcf022 IB/core: Fix deadlock on uverbs modify_qp error flow
The deadlock occurs in __uverbs_modify_qp: we take a lock (idr_read_qp)
and in case of failure in ib_resolve_eth_l2_attrs we don't release
it (put_qp_read).  Fix that.

Fixes: ed4c54e5b4 ("IB/core: Resolve Ethernet L2 addresses when modifying QP")
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-17 22:06:42 -08:00
Ilya Nelkenbaum c2be9dc0e0 IB/core: When marshaling ucma path from user-space, clear unused fields
When marshaling a user path to the kernel struct ib_sa_path, we need
to zero smac and dmac and set the vlan id to the "no vlan" value.

This is to ensure that Ethernet attributes are not used with
InfiniBand QPs.

Fixes: dd5f03beb4 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Signed-off-by: Ilya Nelkenbaum <ilyan@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-17 12:34:52 -08:00
Yann Droneaud 43c6116573 Revert "IB/core: Add support for extended query device caps"
While commit 7e36ef8205 ("IB/core: Temporarily disable
ex_query_device uverb") is correct as it makes the extended
QUERY_DEVICE uverb (which came as part of commit 5a77abf9a9
("IB/core: Add support for extended query device caps") and commit
860f10a799 ("IB/core: Add flags for on demand paging support")) not
available to userspace, it doesn't address the initial issue regarding
ib_copy_to_udata() [1][2].

Additionally, further discussions around this new uverb seems to
conclude it would require a different data structure than the one
currently described in <rdma/ib_user_verbs.h> [3].

Both of these issues require a revert of the changes, so this patch
partially reverts commit 8cdd312cfe ("IB/mlx5: Implement the ODP
capability query verb") and commit 860f10a799 ("IB/core: Add flags
for on demand paging support") and fully reverts commit 5a77abf9a9
("IB/core: Add support for extended query device caps").

[1] "Re: [PATCH v3 06/17] IB/core: Add support for extended query device caps"
    http://mid.gmane.org/1418733236.2779.26.camel@opteya.com

[2] "Re: [PATCH] IB/core: Temporarily disable ex_query_device uverb"
    http://mid.gmane.org/1423067503.3030.83.camel@opteya.com

[3] "RE: [PATCH v1 1/5] IB/uverbs: ex_query_device: answer must not depend on request's comp_mask"
    http://mid.gmane.org/2807E5FD2F6FDA4886F6618EAC48510E0CC12C30@CRSMSX101.amr.corp.intel.com

Cc: Eli Cohen <eli@mellanox.com>
Cc: Haggai Eran <haggaie@mellanox.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-06 00:54:33 -08:00
Haggai Eran 7e36ef8205 IB/core: Temporarily disable ex_query_device uverb
Commit 5a77abf9a9 ("IB/core: Add support for extended query device caps")
added a new extended verb to query the capabilities of RDMA devices, but the
semantics of this verb are still under debate [1].

Don't expose this verb to userspace until the ABI is nailed down.

[1] [PATCH v1 0/5] IB/core: extended query device caps cleanup for v3.19
    http://www.spinics.net/lists/linux-rdma/msg22904.html

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-02-03 09:29:11 -08:00
Roland Dreier a7cfef21e3 Merge branches 'core', 'cxgb4', 'ipoib', 'iser', 'mlx4', 'ocrdma', 'odp' and 'srp' into for-next 2014-12-15 18:19:20 -08:00
Haggai Eran 882214e2b1 IB/core: Implement support for MMU notifiers regarding on demand paging regions
* Add an interval tree implementation for ODP umems. Create an
  interval tree for each ucontext (including a count of the number of
  ODP MRs in this context, semaphore, etc.), and register ODP umems in
  the interval tree.
* Add MMU notifiers handling functions, using the interval tree to
  notify only the relevant umems and underlying MRs.
* Register to receive MMU notifier events from the MM subsystem upon
  ODP MR registration (and unregister accordingly).
* Add a completion object to synchronize the destruction of ODP umems.
* Add mechanism to abort page faults when there's a concurrent invalidation.

The way we synchronize between concurrent invalidations and page
faults is by keeping a counter of currently running invalidations, and
a sequence number that is incremented whenever an invalidation is
caught. The page fault code checks the counter and also verifies that
the sequence number hasn't progressed before it updates the umem's
page tables. This is similar to what the kvm module does.

In order to prevent the case where we register a umem in the middle of
an ongoing notifier, we also keep a per ucontext counter of the total
number of active mmu notifiers. We only enable new umems when all the
running notifiers complete.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Yuval Dagan <yuvalda@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:36 -08:00
Shachar Raindel 8ada2c1c0c IB/core: Add support for on demand paging regions
* Extend the umem struct to keep the ODP related data.
* Allocate and initialize the ODP related information in the umem
  (page_list, dma_list) and freeing as needed in the end of the run.
* Store a reference to the process PID struct in the ucontext.  Used to
  safely obtain the task_struct and the mm during fault handling,
  without preventing the task destruction if needed.
* Add 2 helper functions: ib_umem_odp_map_dma_pages and
  ib_umem_odp_unmap_dma_pages. These functions get the DMA addresses
  of specific pages of the umem (and, currently, pin them).
* Support for page faults only - IB core will keep the reference on
  the pages used and call put_page when freeing an ODP umem
  area. Invalidations support will be added in a later patch.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:36 -08:00
Sagi Grimberg 860f10a799 IB/core: Add flags for on demand paging support
* Add a configuration option for enable on-demand paging support in
  the infiniband subsystem (CONFIG_INFINIBAND_ON_DEMAND_PAGING). In a
  later patch, this configuration option will select the MMU_NOTIFIER
  configuration option to enable mmu notifiers.
* Add a flag for on demand paging (ODP) support in the IB device capabilities.
* Add a flag to request ODP MR in the access flags to reg_mr.
* Fail registrations done with the ODP flag when the low-level driver
  doesn't support this.
* Change the conditions in which an MR will be writable to explicitly
  specify the access flags.  This is to avoid making an MR writable just
  because it is an ODP MR.
* Add a ODP capabilities to the extended query device verb.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:35 -08:00
Eli Cohen 5a77abf9a9 IB/core: Add support for extended query device caps
Add extensible query device capabilities verb to allow adding new features.
ib_uverbs_ex_query_device is added and copy_query_dev_fields is used to
copy capability fields to be used by both ib_uverbs_query_device and
ib_uverbs_ex_query_device.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:35 -08:00
Haggai Eran c5d76f130b IB/core: Add umem function to read data from user-space
In some drivers there's a need to read data from a user space area
that was pinned using ib_umem when running from a different process
context.

The ib_umem_copy_from function allows reading data from the physical
pages pinned in the ib_umem struct.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:35 -08:00
Haggai Eran 406f9e5fa9 IB/core: Replace ib_umem's offset field with a full address
In order to allow umems that do not pin memory, we need the umem to
keep track of its region's address.

This makes the offset field redundant, and so this patch removes it.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:13:35 -08:00
Or Kehati 346f98b41b IB/addr: Improve address resolution callback scheduling
Address resolution always does a context switch to a work-queue to
deliver the address resolution event.  When the IP address is already
cached in the system ARP table, we're going through the following:
chain:

    rdma_resolve_ip --> addr_resolve (cache hit) -->

which ends up with:

    queue_req --> set_timeout (now) --> mod_delayed_work(,, delay=1)

We actually do realize that the timeout should be zero, but the code
forces it to a minimum of one jiffie.

Using one jiffie as the minimum delay value results in sub-optimal
scheduling of executing this work item by the workqueue, which on the
below testbed costs about 3-4ms out of 12ms total time.

To fix that, we let the minimum delay to be zero.  Note that the
connect step times change too, as there are address resolution calls
from that flow.

The results were taken from running both client and server on the
same node, over mlx4 RoCE port.

before -->
step              total ms     max ms     min us  us / conn
create id    :        0.01       0.01       6.00       6.00
resolve addr :        4.02       4.01    4013.00    4016.00
resolve route:        0.18       0.18     182.00     183.00
create qp    :        1.15       1.15    1150.00    1150.00
connect      :        6.73       6.73    6730.00    6731.00
disconnect   :        0.55       0.55     549.00     550.00
destroy      :        0.01       0.01       9.00       9.00

after -->
step              total ms     max ms     min us  us / conn
create id    :        0.01       0.01       6.00       6.00
resolve addr :        0.05       0.05      49.00      52.00
resolve route:        0.21       0.21     207.00     208.00
create qp    :        1.10       1.10    1104.00    1104.00
connect      :        1.22       1.22    1220.00    1221.00
disconnect   :        0.71       0.71     713.00     713.00
destroy      :        0.01       0.01       9.00       9.00

Signed-off-by: Or Kehati <ork@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:10:13 -08:00
Jack Morgenstein 514f3ddffe IB/core: Fix mgid key handling in SA agent multicast data-base
Applications can request that the SM assign an MGID by passing a mcast
member request containing MGID = 0. When the SM responds by sending
the allocated MGID, this MGID replaces the 0-MGID in the multicast group.

However, the MGID field in the group is also the key field in the IB
core multicast code rbtree containing the multicast groups for the
port.

Since this is a key field, correct handling requires that the group
entry be deleted from the rbtree and then re-inserted with the new
key, so that the table structure is properly maintained.

The current code does not do this correctly.  Correct operation
requires that if the key-field gid has changed at all, it should be
deleted and re-inserted.

Note that when inserting, if the new MGID is zero (not the case here
but the code should handle this correctly), we allow duplicate entries
for 0-MGIDs.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:10:13 -08:00
Moni Shoua c1bd6cde8e IB/core: Do not resolve VLAN if already resolved
For RoCE, resolution of layer 2 address attributes forces no VLAN if
link-local GIDs are used.  This patch allows applications to choose
the VLAN ID for link-local based RoCE GIDs by setting IB_QP_VID in
their QP attribute mask, and prevents the core from overriding this
choice.

Cc: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-12-15 18:10:12 -08:00
Roland Dreier 7b909bb49a Merge branches 'core', 'cxgb4', 'iser', 'mlx5' and 'ocrdma' into for-next 2014-10-14 14:09:12 -07:00
Jack Morgenstein a040f95dc8 IB/core: Fix XRC race condition in ib_uverbs_open_qp
In ib_uverbs_open_qp, the sharable xrc target qp is created as a
"pseudo" qp and added to a list of qp's sharing the same physical
QP.  This is done before the "pseudo" qp is assigned a uobject.

There is a race condition here if an async event arrives at the
physical qp.  If the event is handled after the pseudo qp is added to
the list, but before it is assigned a uobject, the kernel crashes in
ib_uverbs_qp_event_handler, due to trying to dereference a NULL
uobject pointer.

Note that simply checking for non-NULL is not enough, due to error
flows in ib_uverbs_open_qp.  If the failure is after assigning the
uobject, but before the qp has fully been created, we still have a
problem.

Thus, in ib_uverbs_qp_event_handler, we test that the uobject is
present, and also that it is live.

Reported-by: Matthew Finlay <matt@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-10-14 00:30:56 -07:00
Devesh Sharma 8b0f93d949 IB/core: Clear AH attr variable to prevent garbage data
During create-ah from userspace, uverbs is sending garbage data in
attr.dmac and attr.vlan_id.  This patch sets attr.dmac and
attr.vlan_id to zero.

Fixes: dd5f03beb4 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-10-14 00:29:06 -07:00
Eli Cohen 377b513485 IB/core: Avoid leakage from kernel to user space
Clear the reserved field of struct ib_uverbs_async_event_desc which is
copied to user space.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-10-09 00:08:40 -07:00
Roland Dreier 3bdad2d13f Merge branches 'core', 'ipoib', 'iser', 'mlx4', 'ocrdma' and 'qib' into for-next 2014-09-22 10:05:40 -07:00
Matan Barak a59c5850f0 IB/core: When marshaling uverbs path, clear unused fields
When marsheling a user path to the kernel struct ib_sa_path, need
to zero smac, dmac and set the vlan id to the "no vlan" value.

Fixes: dd5f03beb4 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Reported-by: Aleksey Senin <alekseys@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-09-22 09:46:52 -07:00
Shawn Bohrer 87773dd56d IB: ib_umem_release() should decrement mm->pinned_vm from ib_umem_get
In debugging an application that receives -ENOMEM from ib_reg_mr(), I
found that ib_umem_get() can fail because the pinned_vm count has
wrapped causing it to always be larger than the lock limit even with
RLIMIT_MEMLOCK set to RLIM_INFINITY.

The wrapping of pinned_vm occurs because the process that calls
ib_reg_mr() will have its mm->pinned_vm count incremented.  Later a
different process with a different mm_struct than the one that
allocated the ib_umem struct ends up releasing it which results in
decrementing the new processes mm->pinned_vm count past zero and
wrapping.

I'm not entirely sure what circumstances cause a different process to
release the ib_umem than the one that allocated it but the kernel
stack trace of the freeing process from my situation looks like the
following:

    Call Trace:
     [<ffffffff814d64b1>] dump_stack+0x19/0x1b
     [<ffffffffa0b522a5>] ib_umem_release+0x1f5/0x200 [ib_core]
     [<ffffffffa0b90681>] mlx4_ib_destroy_qp+0x241/0x440 [mlx4_ib]
     [<ffffffffa0b4d93c>] ib_destroy_qp+0x12c/0x170 [ib_core]
     [<ffffffffa0cc7129>] ib_uverbs_close+0x259/0x4e0 [ib_uverbs]
     [<ffffffff81141cba>] __fput+0xba/0x240
     [<ffffffff81141e4e>] ____fput+0xe/0x10
     [<ffffffff81060894>] task_work_run+0xc4/0xe0
     [<ffffffff810029e5>] do_notify_resume+0x95/0xa0
     [<ffffffff814e3dd0>] int_signal+0x12/0x17

The following patch fixes the issue by storing the pid struct of the
process that calls ib_umem_get() so that ib_umem_release and/or
ib_umem_account() can properly decrement the pinned_vm count of the
correct mm_struct.

Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Reviewed-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-09-19 09:55:42 -07:00
Roland Dreier d087f6ad72 Merge branches 'core', 'cxgb4', 'ipoib', 'iser', 'iwcm', 'mad', 'misc', 'mlx4', 'mlx5', 'ocrdma' and 'srp' into for-next 2014-08-14 08:58:04 -07:00
Ira Weiny 1471cb6ca6 IB/mad: Add user space RMPP support
Using the new registration mechanism, define a flag that indicates the
user wishes to process RMPP messages in user space rather than have
the kernel process them.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-10 20:36:00 -07:00
Ira Weiny 0f29b46d49 IB/mad: add new ioctl to ABI to support new registration options
Registrations options are specified through flags.  Definitions of flags will
be in subsequent patches.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-10 20:36:00 -07:00
Ira Weiny 9ad13a4234 IB/mad: Add dev_notice messages for various umad/mad registration failures
Registration failures can be difficult to debug from userspace.  This
gives more visibility.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-10 20:36:00 -07:00
Ira Weiny 7ef5d4b046 IB/mad: Update module to [pr|dev]_* style print messages
Use dev_* style print when struct device is available.

Also combine previously line broken user-visible strings as per
Documentation/CodingStyle:

"However, never break user-visible strings such as printk messages,
because that breaks the ability to grep for them."

Signed-off-by: Ira Weiny <ira.weiny@intel.com>

[ Remove PFX so the patch actually builds.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-10 20:35:39 -07:00
Ira Weiny f426a40eb6 IB/umad: Update module to [pr|dev]_* style print messages
Use dev_* style print when struct device is available.

Also combine previously line broken user-visible strings as per
Documentation/CodingStyle:

"However, never break user-visible strings such as printk messages,
because that breaks the ability to grep for them."

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-10 19:50:07 -07:00
Steve Wise 2f0304d218 RDMA/iwcm: Use a default listen backlog if needed
If the user creates a listening cm_id with backlog of 0 the IWCM ends
up not allowing any connection requests at all.  The correct behavior
is for the IWCM to pick a default value if the user backlog parameter
is zero.

Lustre from version 1.8.8 onward uses a backlog of 0, which breaks
iwarp support without this fix.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-05 07:33:24 -07:00
Matan Barak 7e6edb9b2e IB/core: Add user MR re-registration support
Memory re-registration is a feature that enables changing the
attributes of a memory region registered by user-space, including PD,
translation (address and length) and access flags.

Add the required support in uverbs and the kernel verbs API.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-01 15:11:13 -07:00
Roland Dreier eeaddf3670 Merge branches 'core', 'cxgb3', 'cxgb4', 'iser', 'iwpm', 'misc', 'mlx4', 'mlx5', 'noio', 'ocrdma', 'qib', 'srp' and 'usnic' into for-next 2014-06-10 10:12:14 -07:00
Tatyana Nikolova 30dc5e63d6 RDMA/core: Add support for iWARP Port Mapper user space service
This patch adds iWARP Port Mapper (IWPM) Version 2 support.  The iWARP
Port Mapper implementation is based on the port mapper specification
section in the Sockets Direct Protocol paper -
http://www.rdmaconsortium.org/home/draft-pinkerton-iwarp-sdp-v1.0.pdf

Existing iWARP RDMA providers use the same IP address as the native
TCP/IP stack when creating RDMA connections.  They need a mechanism to
claim the TCP ports used for RDMA connections to prevent TCP port
collisions when other host applications use TCP ports.  The iWARP Port
Mapper provides a standard mechanism to accomplish this.  Without this
service it is possible for RDMA application to bind/listen on the same
port which is already being used by native TCP host application.  If
that happens the incoming TCP connection data can be passed to the
RDMA stack with error.

The iWARP Port Mapper solution doesn't contain any changes to the
existing network stack in the kernel space.  All the changes are
contained with the infiniband tree and also in user space.

The iWARP Port Mapper service is implemented as a user space daemon
process.  Source for the IWPM service is located at
http://git.openfabrics.org/git?p=~tnikolova/libiwpm-1.0.0/.git;a=summary

The iWARP driver (port mapper client) sends to the IWPM service the
local IP address and TCP port it has received from the RDMA
application, when starting a connection.  The IWPM service performs a
socket bind from user space to get an available TCP port, called a
mapped port, and communicates it back to the client.  In that sense,
the IWPM service is used to map the TCP port, which the RDMA
application uses to any port available from the host TCP port
space. The mapped ports are used in iWARP RDMA connections to avoid
collisions with native TCP stack which is aware that these ports are
taken. When an RDMA connection using a mapped port is terminated, the
client notifies the IWPM service, which then releases the TCP port.

The message exchange between the IWPM service and the iWARP drivers
(between user space and kernel space) is implemented using netlink
sockets.

1) Netlink interface functions are added: ibnl_unicast() and
   ibnl_mulitcast() for sending netlink messages to user space

2) The signature of the existing ibnl_put_msg() is changed to be more
   generic

3) Two netlink clients are added: RDMA_NL_NES, RDMA_NL_C4IW
   corresponding to the two iWarp drivers - nes and cxgb4 which use
   the IWPM service

4) Enums are added to enumerate the attributes in the netlink
   messages, which are exchanged between the user space IWPM service
   and the iWARP drivers

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: PJ Waskiewicz <pj.waskiewicz@solidfire.com>

[ Fold in range checking fixes and nlh_next removal as suggested by Dan
  Carpenter and Steve Wise.  Fix sparse endianness in hash.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-10 10:11:45 -07:00
Bart Van Assche 60e1751cb5 IB/umad: Fix use-after-free on close
Avoid that closing /dev/infiniband/umad<n> or /dev/infiniband/issm<n>
triggers a use-after-free.  __fput() invokes f_op->release() before it
invokes cdev_put().  Make sure that the ib_umad_device structure is
freed by the cdev_put() call instead of f_op->release().  This avoids
that changing the port mode from IB into Ethernet and back to IB
followed by restarting opensmd triggers the following kernel oops:

    general protection fault: 0000 [#1] PREEMPT SMP
    RIP: 0010:[<ffffffff810cc65c>]  [<ffffffff810cc65c>] module_put+0x2c/0x170
    Call Trace:
     [<ffffffff81190f20>] cdev_put+0x20/0x30
     [<ffffffff8118e2ce>] __fput+0x1ae/0x1f0
     [<ffffffff8118e35e>] ____fput+0xe/0x10
     [<ffffffff810723bc>] task_work_run+0xac/0xe0
     [<ffffffff81002a9f>] do_notify_resume+0x9f/0xc0
     [<ffffffff814b8398>] int_signal+0x12/0x17

Reference: https://bugzilla.kernel.org/show_bug.cgi?id=75051
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Cc: <stable@vger.kernel.org> # 3.x: 8ec0a0e6b58: IB/umad: Fix error handling
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-06 11:38:31 -07:00
Haggai Eran 584482ac80 IB/core: Fix kobject leak on device register error flow
The ports kobject isn't being released during error flow in device
registration.  This patch refactors the ports kobject cleanup into a
single function called from both the error flow in device registration
and from the unregistration function.

A couple of attributes aren't being deleted (iw_stats_group, and
ib_class_attributes).  While this may be handled implicitly by the
destruction of their kobjects, it seems better to handle all the
attributes the same way.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>

[ Make free_port_list_attributes() static.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-05 09:37:10 -07:00
Haggai Eran cad6d02acc IB/core: Fix port kobject deletion during error flow
When encountering an error during the add_port function, adding a port
to sysfs, the port kobject is freed without being deleted from sysfs.

Instead of freeing it directly, the patch uses kobject_put to release
the kobject and delete it.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-04 10:03:49 -07:00
Haggai Eran 373c0ea181 IB/core: Remove unneeded kobject_get/put calls
The ib_core module will call kobject_get on the parent object of each
kobject it creates.  This is redundant since kobject_add does that
anyway.

As a side effect, this patch should fix leaking the ports kobject and
the device kobject during unregister flow, since the previous code
didn't seem to take into account the kobject_get calls on behalf of
the child kobjects.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-04 10:03:49 -07:00
Roland Dreier 8385fd8414 IB/core: Fix sparse warnings about redeclared functions
Fix a few functions that are declared with __attribute_const__ in the
ib_verbs.h header file but defined without it in verbs.c.  This gets rid
of the following sparse warnings:

    drivers/infiniband/core/verbs.c:51:5: error: symbol 'ib_rate_to_mult' redeclared with different type (originally declared at include/rdma/ib_verbs.h:469) - different modifiers
    drivers/infiniband/core/verbs.c:68:14: error: symbol 'mult_to_ib_rate' redeclared with different type (originally declared at include/rdma/ib_verbs.h:607) - different modifiers
    drivers/infiniband/core/verbs.c:85:5: error: symbol 'ib_rate_to_mbps' redeclared with different type (originally declared at include/rdma/ib_verbs.h:476) - different modifiers
    drivers/infiniband/core/verbs.c:111:1: error: symbol 'rdma_node_get_transport' redeclared with different type (originally declared at include/rdma/ib_verbs.h:84) - different modifiers

Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-04 10:01:42 -07:00
Roland Dreier 5343c00dd0 IB/mad: Fix sparse warning about gfp_t use
Properly convert gfp_t & result to bool to fix:

    drivers/infiniband/core/sa_query.c:621:33: warning: incorrect type in initializer (different base types)
    drivers/infiniband/core/sa_query.c:621:33:    expected bool [unsigned] [usertype] preload
    drivers/infiniband/core/sa_query.c:621:33:    got restricted gfp_t

Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-06-03 10:24:24 -07:00
Bart Van Assche 8ec0a0e6b5 IB/umad: Fix error handling
Avoid leaking a kref count in ib_umad_open() if port->ib_dev == NULL
or if nonseekable_open() fails.

Avoid leaking a kref count, that sm_sem is kept down and also that the
IB_PORT_SM capability mask is not cleared in ib_umad_sm_open() if
nonseekable_open() fails.

Since container_of() never returns NULL, remove the code that tests
whether container_of() returns NULL.

Moving the kref_get() call from the start of ib_umad_*open() to the
end is safe since it is the responsibility of the caller of these
functions to ensure that the cdev pointer remains valid until at least
when these functions return.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: <stable@vger.kernel.org>

[ydroneaud@opteya.com: rework a bit to reduce the amount of code changed]

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>

[ nonseekable_open() can't actually fail, but....  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-05-29 21:27:30 -07:00
Roland Dreier f7eaa7ed8f Merge branches 'core', 'cxgb4', 'ip-roce', 'iser', 'misc', 'mlx4', 'nes', 'ocrdma', 'qib', 'sgwrapper', 'srp' and 'usnic' into for-next 2014-04-03 08:30:17 -07:00
Moni Shoua b2853fd6c2 IB/core: Don't resolve passive side RoCE L2 address in CMA REQ handler
The code that resolves the passive side source MAC within the rdma_cm
connection request handler was both redundant and buggy, so remove it.

It was redundant since later, when an RC QP is modified to RTR state,
the resolution will take place in the ib_core module.  It was buggy
because this callback also deals with UD SIDR exchange, for which we
incorrectly looked at the REQ member of the CM event and dereferenced
a random value.

Fixes: dd5f03beb4 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-04-01 14:05:26 -07:00
Yan Burman 2c34e68f42 IB/mad: Check and handle potential DMA mapping errors
Running with DMA_API_DEBUG enabled and not checking for DMA mapping
errors triggers a kernel stack trace with "DMA-API: device driver
failed to check map error" message.  Add these checks to the MAD
module, both to be be more robust and also eliminate these
false-positive stack traces.

Signed-off-by: Yan Burman <yanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-04-01 10:36:07 -07:00
Sagi Grimberg 1b01d33560 IB/core: Introduce signature verbs API
Introduce a verbs interface for signature-related operations.  A
signature handover operation configures the layouts of data and
protection attributes both in memory and wire domains.

Signature operations are:

- INSERT:
  Generate and insert protection information when handing over
  data from input space to output space.
- validate and STRIP:
  Validate protection information and remove it when handing over
  data from input space to output space.
- validate and PASS:
  Validate protection information and pass it when handing over
  data from input space to output space.

Once the signature handover opration is done, the HCA will offload
data integrity generation/validation while performing the actual data
transfer.

Additions:

1. HCA signature capabilities in device attributes
    Verbs provider supporting signature handover operations fills
    relevant fields in device attributes structure returned by
    ib_query_device.

2. QP creation flag IB_QP_CREATE_SIGNATURE_EN
    Creating a QP that will carry signature handover operations may
    require some special preparations from the verbs provider.  So we
    add QP creation flag IB_QP_CREATE_SIGNATURE_EN to declare that the
    created QP may carry out signature handover operations.  Expose
    signature support to verbs layer (no support for now).

3. New send work request IB_WR_REG_SIG_MR
    Signature handover work request. This WR will define the signature
    handover properties of the memory/wire domains as well as the
    domains layout. The purpose of this work request is to bind all
    the needed information for the signature operation:

    - data to be transferred:  wr->sg_list (ib_sge).
      * The raw data, pre-registered to a single MR (normally, before
        signature, this MR would have been used directly for the data
        transfer)
    - data protection guards: sig_handover.prot (ib_sge).
      * The data protection buffer, pre-registered to a single MR, which
        contains the data integrity guards of the raw data blocks.
        Note that it may not always exist, only in cases where the user is
        interested in storing protection guards in memory.
    - signature operation attributes: sig_handover.sig_attrs.
      * Tells the HCA how to validate/generate the protection information.

    Once the work request is executed, the memory region that will
    describe the signature transaction will be the sig_mr.  The
    application can now go ahead and send the sig_mr.rkey or use the
    sig_mr.lkey for data transfer.

4. New Verb ib_check_mr_status
    check_mr_status verb checks the status of the memory region post
    transaction.  The first check that may be used is
    IB_MR_CHECK_SIG_STATUS, which will indicate if any signature
    errors are pending for a specific signature-enabled ib_mr.  This
    verb is a lightwight check and is allowed to be taken from
    interrupt context.  An application must call this verb after it is
    known that the actual data transfer has finished.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-03-07 11:26:49 -08:00
Sagi Grimberg 17cd3a2db8 IB/core: Introduce protected memory regions
This commit introduces verbs for creating/destoying memory
regions which will allow new types of memory key operations such
as protected memory registration.

Indirect memory registration is registering several (one
of more) pre-registered memory regions in a specific layout.
The Indirect region may potentialy describe several regions
and some repitition format between them.

Protected Memory registration is registering a memory region
with various data integrity attributes which will describe protection
schemes that will be handled by the HCA in an offloaded manner.
These memory regions will be applicable for a new REG_SIG_MR
work request introduced later in this patchset.

In the future these routines may replace or implement current memory
regions creation routines existing today:
- ib_reg_user_mr
- ib_alloc_fast_reg_mr
- ib_get_dma_mr
- ib_dereg_mr

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-03-07 11:26:49 -08:00
Yishai Hadas eeb8461e36 IB: Refactor umem to use linear SG table
This patch refactors the IB core umem code and vendor drivers to use a
linear (chained) SG table instead of chunk list.  With this change the
relevant code becomes clearer—no need for nested loops to build and
use umem.

Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-03-04 10:34:28 -08:00
Linus Torvalds 4ba9920e5e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:

 1) BPF debugger and asm tool by Daniel Borkmann.

 2) Speed up create/bind in AF_PACKET, also from Daniel Borkmann.

 3) Correct reciprocal_divide and update users, from Hannes Frederic
    Sowa and Daniel Borkmann.

 4) Currently we only have a "set" operation for the hw timestamp socket
    ioctl, add a "get" operation to match.  From Ben Hutchings.

 5) Add better trace events for debugging driver datapath problems, also
    from Ben Hutchings.

 6) Implement auto corking in TCP, from Eric Dumazet.  Basically, if we
    have a small send and a previous packet is already in the qdisc or
    device queue, defer until TX completion or we get more data.

 7) Allow userspace to manage ipv6 temporary addresses, from Jiri Pirko.

 8) Add a qdisc bypass option for AF_PACKET sockets, from Daniel
    Borkmann.

 9) Share IP header compression code between Bluetooth and IEEE802154
    layers, from Jukka Rissanen.

10) Fix ipv6 router reachability probing, from Jiri Benc.

11) Allow packets to be captured on macvtap devices, from Vlad Yasevich.

12) Support tunneling in GRO layer, from Jerry Chu.

13) Allow bonding to be configured fully using netlink, from Scott
    Feldman.

14) Allow AF_PACKET users to obtain the VLAN TPID, just like they can
    already get the TCI.  From Atzm Watanabe.

15) New "Heavy Hitter" qdisc, from Terry Lam.

16) Significantly improve the IPSEC support in pktgen, from Fan Du.

17) Allow ipv4 tunnels to cache routes, just like sockets.  From Tom
    Herbert.

18) Add Proportional Integral Enhanced packet scheduler, from Vijay
    Subramanian.

19) Allow openvswitch to mmap'd netlink, from Thomas Graf.

20) Key TCP metrics blobs also by source address, not just destination
    address.  From Christoph Paasch.

21) Support 10G in generic phylib.  From Andy Fleming.

22) Try to short-circuit GRO flow compares using device provided RX
    hash, if provided.  From Tom Herbert.

The wireless and netfilter folks have been busy little bees too.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2064 commits)
  net/cxgb4: Fix referencing freed adapter
  ipv6: reallocate addrconf router for ipv6 address when lo device up
  fib_frontend: fix possible NULL pointer dereference
  rtnetlink: remove IFLA_BOND_SLAVE definition
  rtnetlink: remove check for fill_slave_info in rtnl_have_link_slave_info
  qlcnic: update version to 5.3.55
  qlcnic: Enhance logic to calculate msix vectors.
  qlcnic: Refactor interrupt coalescing code for all adapters.
  qlcnic: Update poll controller code path
  qlcnic: Interrupt code cleanup
  qlcnic: Enhance Tx timeout debugging.
  qlcnic: Use bool for rx_mac_learn.
  bonding: fix u64 division
  rtnetlink: add missing IFLA_BOND_AD_INFO_UNSPEC
  sfc: Use the correct maximum TX DMA ring size for SFC9100
  Add Shradha Shah as the sfc driver maintainer.
  net/vxlan: Share RX skb de-marking and checksum checks with ovs
  tulip: cleanup by using ARRAY_SIZE()
  ip_tunnel: clear IPCB in ip_tunnel_xmit() in case dst_link_failure() is called
  net/cxgb4: Don't retrieve stats during recovery
  ...
2014-01-25 11:17:34 -08:00
Roland Dreier fb1b5034e4 Merge branch 'ip-roce' into for-next
Conflicts:
	drivers/infiniband/hw/mlx4/main.c
2014-01-22 23:24:21 -08:00
Roland Dreier 8f399921ea Merge branches 'cma', 'cxgb4', 'flowsteer', 'ipoib', 'misc', 'mlx4', 'mlx5', 'ocrdma', 'qib', 'srp' and 'usnic' into for-next 2014-01-22 23:24:13 -08:00