Make sure that for Ethernet ports, the port GID table index 0 is always
occupied with a default GID of the relevant IPv6 link-local adderss.

This provides better user experience for legacy applications that don't use
the RDMA CM and were working on index 0 prior to the IP addressing change.

Also, as GIDs are generated from IP addresses of the network devices that
are associated with the port, it's basically possible that the GID table
will be empty if no IP address was assigned.  This doesn't comply with the
IB spec section 4.1.1 "GID usage and properties".
Signed-off-by: NMoni Shoua <monis@mellanox.co.il>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

When the device has only Ethernet ports, don't try to allocate range
of steerable UD QPs since they aren't needed.  This fixes an issue
where mlx4 VFs tried to allocate a range of UD steerable QPs, but
failed to do so.

Fixes: c1c98501 ("IB/mlx4: Add support for steerable IB UD QPs")
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Verify that reserved fields in struct mlx5_ib_resize_cq are cleared
before continuing execution of the verb. This is required to allow
making use of this area in future revisions.
Signed-off-by: NYann Droneaud <ydroneaud@opteya.com>
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

The current code attmepts to call ib_umem_get() even if the length is
zero, which causes a failure. Since the spec allows zero length work
queues, change the code so we don't call ib_umem_get() in those cases.
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Implement resize CQ which is a mandatory verb in mlx5.
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Modify CQ is used by ULPs like IPoIB to change moderation parameters.  This
patch adds support in mlx5.
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Put a wmb() to make sure the doorbell record is visible to the HCA before we
hit doorbell.
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Use the possibly more efficient ether_addr_equal() instead of memcmp().
Signed-off-by: NWang Weidong <wangweidong1@huawei.com>
Signed-off-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

The GSI QP type is compatible with and should be allowed to send data
to/from any UD QP.  This was found when testing ibacm on the same node
as an SA.

Cc: <stable@vger.kernel.org>
Reviewed-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NIra Weiny <ira.weiny@intel.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Building mem.o for 32 bits x86 triggers a GCC warning:

    drivers/infiniband/hw/cxgb4/mem.c: In function '_c4iw_write_mem_dma_aligned':
    drivers/infiniband/hw/cxgb4/mem.c:79:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]

Silence that warning by casting "&wr_wait" to unsigned long before
casting it to __be64.  That's what _c4iw_write_mem_inline() already does.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Acked-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Remove including <linux/version.h> that don't need it.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

There is a path in handle_vq() where kmem_cache_free() can be called
with pointer to a local variable.  It can happen if vq_repbuf_alloc()
failed to allocate memory from cache and req is NULL.

The patch adds check if cache memory was allocated before freeing it.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NSvetlana Mavrina <another.karnil@gmail.com>
Reviewed-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This is called from qp_grp_and_vf_bind() and we are holding the
vf->lock so the allocation can't sleep.

Fixes: e3cf00d0 ('IB/usnic: Add Cisco VIC low-level hardware driver')
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

...instead of testing defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Now that ocrdma supports IP-based addressing, we need to depend on
INET, since ocrdma registers itself for net device events.
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This fixes the build if IPV6 isn't enabled.
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Since mlx4_ib supports IP based addressing, a dependency on INET needs
to be added, since mlx4_ib registers itself for net device events.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This patch is similar in spirit to the "IB/mlx4: Use IBoE (RoCE) IP
based GIDs in the port GID table" patch.

Changes to inet4 and inet6 addresses for the host are monitored and if
the address is associated with an ocrdma device then a gid is added or
deleted from the device's gid table. The gid format will be a IPv4 to
IPv6 mapped or the IPv6 address.

Cc: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NMoni Shoua <monis@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This patch is similar in spirit to the "IB/mlx4: Handle Ethernet L2
parameters for IP based GID addressing".  It handles the fact that IP
based RoCE gids don't store Ethernet L2 parameters, MAC and VLAN.

When building an address handle, instead of parsing the dgid to
get the MAC and VLAN, take them from the address handle attributes.

Cc: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NMoni Shoua <monis@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

IP based RoCE gids don't store Ethernet L2 parameters, MAC and VLAN.

Therefore, we need to extract them from the CQE and place them in
struct ib_wc (to be used for cases were they were taken from the gid).

Also, when modifying a QP or building address handle, instead of
parsing the dgid to get the MAC and VLAN, take them from the address
handle attributes.
Signed-off-by: NMoni Shoua <monis@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Currently, the mlx4 driver set IBoE (RoCE) gids to encode related
Ethernet netdevice interface MAC address and possibly VLAN id.

Change this scheme such that gids encode interface IP addresses (both
IP4 and IPv6).

This requires learning the IP addresses which are of use by a
netdevice associated with the HCA port, formatting them to gids and
adding them to the port gid table.  Furthermore, events of add and
delete address are caught to maintain the gid table accordingly.

Associated IP addresses may belong to a master of an Ethernet
netdevice on top of that port so this should be considered when
building and maintaining the gid table.
Signed-off-by: NMoni Shoua <monis@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Set the return variable to an error code as done elsewhere in the function.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

The variable qp_grp is initialized but never used otherwise, so remove
the unused variable.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

usNIC userspace/kernel ABI should be set to 4 instead of 3.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

usNIC default transport is UDP.  Hence, advertise RDMA_NODE_USNIC_UDP
by default for usNIC devices.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

usNIC needs inet notifiers to function correctly, so add a Kconfig
dependency on CONFIG_INET.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Fix sparse endianness related warnings.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This patch add the support for Ethernet L2 attributes in the
verbs/cm/cma structures.

When dealing with L2 Ethernet, we should use smac, dmac, vlan ID and priority
in a similar manner that the IB L2 (and the L4 PKEY) attributes are used.

Thus, those attributes were added to the following structures:

* ib_ah_attr - added dmac
* ib_qp_attr - added smac and vlan_id, (sl remains vlan priority)
* ib_wc - added smac, vlan_id
* ib_sa_path_rec - added smac, dmac, vlan_id
* cm_av - added smac and vlan_id

For the path record structure, extra care was taken to avoid the new
fields when packing it into wire format, so we don't break the IB CM
and SA wire protocol.

On the active side, the CM fills. its internal structures from the
path provided by the ULP.  We add there taking the ETH L2 attributes
and placing them into the CM Address Handle (struct cm_av).

On the passive side, the CM fills its internal structures from the WC
associated with the REQ message.  We add there taking the ETH L2
attributes from the WC.

When the HW driver provides the required ETH L2 attributes in the WC,
they set the IB_WC_WITH_SMAC and IB_WC_WITH_VLAN flags. The IB core
code checks for the presence of these flags, and in their absence does
address resolution from the ib_init_ah_from_wc() helper function.

ib_modify_qp_is_ok is also updated to consider the link layer. Some
parameters are mandatory for Ethernet link layer, while they are
irrelevant for IB.  Vendor drivers are modified to support the new
function signature.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This patch adds support for steerable (NETIF) QP creation.  When we
create the device, we allocate a range of steerable QPs.

Afterward when a QP is created with the NETIF flag, it's allocated
from this range.  Allocation is managed by bitmap allocator.

Internal steering rules for those QPs is automatically generated on
their creation.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

The mlx4 device requires adding IB flow spec to rules that apply over
infiniband link layer.  This patch adds a mechanism to add such a rule.

If higher levels e.g. IP/UDP/TCP flow specs are provided, the device
requires us to add an empty wild-carded IB rule. Furthermore, the device
requires the QPN to be put in the rule.

Add here specific parsing support for IB empty rules and the ability
to self-generate missing specs based on existing ones.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Up until now, flow steering wasn't supported when using IB ports.

This patch enables support for flow steering if all hardware ports
support that, for example the new MLX4_DEV_CAP_FLAG2_DMFS_IPOIB mlx4
device capability.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

The micro UAR (uuar) allocator had a bug which resulted from the fact
that in each UAR we only have two micro UARs avaialable, those at
index 0 and 1.  This patch defines iterators to aid in traversing the
list of available micro UARs when allocating a uuar.

In addition, change the logic in create_user_qp() so that if high
class allocation fails (high class means lower latency), we revert to
medium class and not to the low class.
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

The variable start in struct mlx5_ib_mr is never used. Remove it.
Signed-off-by: NEli Cohen <eli@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Add comment describing usnic_transport_rsrv port and remove
extraneous space from usnic_transport.c.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Signed-off-by: NRoland Dreier <roland@purestorage.com>

Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Use for_each_sg() instead of an explicit for-loop to iterate over
scatter-gather list.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

UDP support for qp_grps/qps.
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Add supports for:
	1) Parsing the socket file descriptor pass down from userspace.
	2) IP notifiers
	3) Encoding the IP in the GID
	4) Other aux. changes to support UDP
Signed-off-by: NUpinder Malhi <umalhi@cisco.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>