Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

In some platforms, when iommu is enabled, the bus address returned by
dma_alloc_coherent is different than the physical address.  ocrdma
should use physical address for mmap-ing the queue memory for the
applications.

This patch adds the use of virt_to_phys() at all such places where
kernel buffer is mapped to user process context.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

When ib_request_notify_cq() is called for the first time, ocrdma tries
to skip setting deffered_arm flag. This may lead CQ to an un-armed
state thus never generating a CQ event and leaving consumer hung.

This patch removes the part of code that skips setting deferred_arm.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Fix ocrdma_query_device() to report correct value of max_fast_reg_page_list_len.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

This patch fix spelling typo in printk.
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Ocrdma does not report hw_ver when query_device is issued.  This patch
adds a meaningful value to this field.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Update the max_mr_size with proper value. Corrected the response
structure of query config mailbox command.
Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.Com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

If any mailbox command reports timeout, save the state in the driver,
to prevent issuing any more commands to the HW.  Do proper cleanup
even if FW is in error state.
Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.Com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Prevent posting opcodes other than send and send immediate on the UD QPs.
Signed-off-by: NMitesh Ahuja <mitesh.ahuja@emulex.Com>
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

During cable pull test with a mount over NFS/RDMA, the driver was
reporting error completions when there were no pending requests in the
SQ and RQ.  This was triggering a host crash because of reporting
wrong work req id.  Avoid this crash by adding a check for SQ and RQ
empty condition and prevent reporting completions if queues are empty.
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Removing hardcoded value of max dpp qps and calculate the same from
doorbell page size and WQE size.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

We should cast pointers to and from unsigned long to turn them into ints.
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Clean up code.  Also modifying GSI QP to error during ocrdma_close is fixed.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

As part of SRQ receive buffers posting we populate a non-zero tag
which will be returned in SRQ receive completions.
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

ocrdma driver selects execution path based on sli_family and asic
generation number.  This introduces code to read the asic gen number
from pci register instead of obtaining it from the Emulex NIC driver.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Introducing new macros to define SQ and RQ doorbell offset.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Stale entries in the CQ being destroyed causes hardware to generate
EQEs indefinitely for a given CQ.  Thus causing uncontrolled execution
of irq_handler.  This patch fixes this using following sementics:

    * irq_handler will ring EQ doorbell atleast once and implement budgeting scheme.
    * cq_destroy will count number of valid entires during destroy and ring
      cq-db so that hardware does not generate uncontrolled EQE.
    * cq_destroy will synchronize with last running irq_handler instance.
    * arm_cq will always defer arming CQ till poll_cq, except for the first arm_cq call.
    * poll_cq will always ring cq-db with arm=SET if arm_cq was called prior to enter poll_cq.
    * poll_cq will always ring cq-db with arm=UNSET if arm_cq was not called prior to enter poll_cq.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: NSelvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

drivers/infiniband/hw/ocrdma/ocrdma_verbs.c: In function ‘_ocrdma_modify_qp’:
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c:1299:31: error: ‘old_qps’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  status = ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask, old_qps);

ocrdma_mbx_modify_qp() (and subsequent calls) doesn't appear to use old_qps
so it doesn't need to be passed on.  Removing the variable results in the
warning going away.
Signed-off-by: NPrarit Bhargava <prarit@redhat.com>
Acked-by: Devesh Sharma (Devesh.sharma@emulex.com)
Signed-off-by: NRoland Dreier <roland@purestorage.com>

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: NShachar Raindel <raindel@mellanox.com>
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Use correct value for obtaining traffic class from device
response for Query QP request.
Signed-off-by: NDevesh Sharma <devesh.sharma@emulex.com>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

For userspace RoCE UD QPs we need to know the GID format that the
kernel uses, e.g when working over older kernels. For that end, add a
new port capability IB_PORT_IP_BASED_GIDS and report it when query
port is issued.
Signed-off-by: NMoni Shoua <monis@mellanox.co.il>
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 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 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>

Remove the redundant check of comparing if a 32-bit value is greater
than 0xffffffffULL.

Reported by Dan Carpenter.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

1) ocrdma_remove_free() is called from a call_rcu callback funtion
   context, which can be a bottom-half context. So the code in
   ocrdma_remove_free should not sleep.

   But ocrdma_cleanup_hw() can sleep, So move it ocrdma_remove()
   instead of ocrdma_remove_free.

2) Fix a couple of kbuild test robot warnings.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

These aren't necessary after switch blocks.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Fix:

   drivers/infiniband/hw/ocrdma/ocrdma_verbs.c: In function 'ocrdma_build_fr':
>> drivers/infiniband/hw/ocrdma/ocrdma_verbs.c:1832:7: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     mr = (struct ocrdma_mr *)qp->dev->stag_arr[(hdr->lkey >> 8) &
          ^
   drivers/infiniband/hw/ocrdma/ocrdma_verbs.c: In function 'ocrdma_alloc_frmr':
>> drivers/infiniband/hw/ocrdma/ocrdma_verbs.c:2661:64: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = (u64) mr;
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

While posting inline DPP data, we are not considering multiple sges.
Fix this.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

1) Increase STAG Array size.
2) Max inline data size should be set to the same value
   used during QP creation
3) Set max_sge_rd to zero since we dont support RD transport in our adapters.
4) Max cqes reported in ibv_devinfo should be from QUERY_CONFIG.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Create_CQ verb doesn't provide a PD pointer.  So, until now we are
creating all (both userspace and kernel) CQ DB regions from PD0.  This
will result in mmapping PD0 to applications.  A rogue userspace
application can mess things up.

Also more serious issues is even the be2net NIC uses PD0.

This patch addresses this problem by:

1) Create a PD page for every userspace application when the
   alloc_ucontext is called. This will be destroyed in
   dealloc_ucontext.
2) All CQs for that context will use the PD allocated in ucontext.
3) The first create_PD call from application will result in returning
   the PD address from its ucontext (no new PD will be created).
4) For subsecquent create_pd calls from application, we create new PDs for
   the application.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

1) Fixed setting FR_MR bit for FRWR stag allocation
2) Access rights are passsed during FRWR stage and not during STAT allocation stage
3) FRWR WQE structure cleanup
4) Add QP level signaled bit.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

1) All RQ doorbells are handled by ERX2 and doorbell->num_posted
   offset is constant to bit offset 24 for ERX2 irrspective of Q id.

2) Fixed RESET to INIT state change (from ERR->RST->INIT->RTR case).
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Also increase MAX AH to 512.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Also get the max_srq value from query_config mailbox response.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

1)	Fix ocrdma_get_num_posted_shift for upto 128 QPs.
2)	Create for min of dev->max_wqe and requested wqe in create_qp.
3)	As part of creating ird queue, populate with basic header templates.
4)	Make sure all the DB memory allocated to userspace are page aligned.
5)	Fix issue in checking the mmap local cache.
6)	Some code cleanup.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

1) In post recv, don't ring the DB doorbell if the QP is in RTR state.
   Cache the DB calls, until the QP is moved to RTS state.
2) Add max_rd_sge support to dev->attr.
3) Code cleanup in alloc_pd path.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

Remove QP state machine in ocrdma low-level driver and use on the core
IB stack's instead.
Signed-off-by: NNaresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>