Fields in this structure are sized excessively based on hardware
limitations and input values.

Fix by reducing fields as appropriate and repositioning to close holes in
the structure.
Reviewed-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

It is only ever written.
Reviewed-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

The usage of this ctxt data field is not hot path and the value can be
computed on demand to cut down the ctxtdata bloat.
Reviewed-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

If we already hold the table->lock when doing the kref_put it means we are
in a context where it is safe to do the deletion synchronously, with no
need for the work queue.

This helps to eliminate issues when GID change is requested as part of MAC
address change or bonding event change where expectation is to replace the
GID almost immediately.

Fixes: b150c386 ("IB/core: Introduce GID entry reference counts")
Reviewed-by: NDaniel Jurgens <danielj@mellanox.com>
Signed-off-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

When sending multicast leave request, consider the net ns in which this
cm_id is created.

Code was duplicated in cma_leave_mc_groups() and rdma_leave_multicast(),
which is now done using a helper function cma_leave_roce_mc_group().

Fixes: bee3c3c9 ("IB/cma: Join and leave multicast groups with IGMP")
Reviewed-by: NDaniel Jurgens <danielj@mellanox.com>
Signed-off-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

In this context the uobject is not allowed to be NULL, so type is the same
as uobject->type, and at least for IDR, id is the same as uobject->id.

FD objects should never handle the FD number outside the uAPI boundary
code.
Suggested-by: NGuy Levi <guyle@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

For dependencies, branch based on 'mellanox/mlx5-next' of
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git

Pull RoCE ICRC counters from Leon Romanovsky:

====================
This series exposes RoCE ICRC counter through existing RDMA hw_counters
sysfs interface.

The first patch has all HW definitions in mlx5_ifc.h file and second patch
is the actual counter implementation.
====================

* branch 'icrc-counter':
  IB/mlx5: Support RoCE ICRC encapsulated error counter
  net/mlx5: Add RoCE RX ICRC encapsulated counter

This patch adds support to query the counter that counts the
RoCE packets with corrupted ICRC (Invariant Cyclic Redundancy Code).

This counter will be under
/sys/class/infiniband/<mlx5-dev>/ports/<port>/hw_counters/

rx_icrc_encapsulated - The number of RoCE packets with ICRC
error.
Signed-off-by: NTalat Batheesh <talatb@mellanox.com>
Reviewed-by: NMark Bloch <markb@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add capability bit in PCAM register and RoCE ICRC error counter
to PPCNT register.
Signed-off-by: NTalat Batheesh <talatb@mellanox.com>
Reviewed-by: NMark Bloch <markb@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>

Put all relevant checks for transport domain in the
mlx5_ib_alloc/dealloc_transport_domain functions.
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Move some s_flags defines out of rdmavt and into hfi1 because they are
hfi1 specific and therefore should remain in the driver instead of
bubbling up to rdmavt.

Document device specific ranges in rdmavt and remap
those in hfi1.
Reviewed-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NKaike Wan <kaike.wan@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

The field is based on a constant that can never change.

Use the define to assign the register instead.
Reviewed-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

This field should be in ctxtdata to allow for better locality of access by
eliminating a dd dereference.

The new field is now side-by-side with rcvhdrqentsize since the rhf_offset
is a function of the rcvhdrqentsize.

Both fields are now correctly sized as u8.
Reviewed-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

The current implementation precludes having receive context specific
packet type receive handlers.

Fix this by adding adding c99 const array for the existing handlers and
remove the current 72 bytes of pointers from devdata.

A new pointer in hfi1_ctxtdata will point to the const array.
Reviewed-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Expose DEVX tree to be used by upper layers.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Return the matching device EQN for a given user vector number via the
DEVX interface.

Note:
EQs are owned by the kernel and shared by all user processes.
Basically, a user CQ can point to any EQ.
The kernel doesn't enforce any such limitation today either.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add support to register a memory with the firmware via the DEVX
interface.

The driver translates a given user address to ib_umem then it will
register the physical addresses with the firmware and get a unique id
for this registration to be used for this virtual address.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Return a device UAR index for a given user index via the DEVX interface.

Security note:
The hardware protection mechanism works like this: Each device object that
is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
the device specification manual) upon its creation. Then upon doorbell,
hardware fetches the object context for which the doorbell was rang, and
validates that the UAR through which the DB was rang matches the UAR ID
of the object.

If no match the doorbell is silently ignored by the hardware.  Of
course, the user cannot ring a doorbell on a UAR that was not mapped to
it.

Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
mailboxes (except tagging them with UID), we expose to the user its UAR
ID, so it can embed it in these objects in the expected specification
format. So the only thing the user can do is hurt itself by creating a
QP/SQ/CQ with a UAR ID other than his, and then in this case other users
may ring a doorbell on its objects.

The consequence of that will be that another user can schedule a QP/SQ
of the buggy user for execution (just insert it to the hardware schedule
queue or arm its CQ for event generation), no further harm is expected.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add support in DEVX for modify and query commands, the required lock is
taken (i.e. READ/WRITE) by the KABI infrastructure accordingly.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add support to create and destroy firmware objects via the DEVX
interface.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add support to run general firmware command via the DEVX interface.

A command that works on some object (e.g. CQ, WQ, etc.) will be added
in next patches while maintaining the required object lock.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Introduce DEVX to enable direct device commands in downstream patches
from this series.

In that mode of work the firmware manages the isolation between
processes' resources and as such a DEVX user id is created and assigned
to the given user context upon allocation request.

A capability check is done to make sure that this feature is really
supported by the firmware prior to creating the DEVX user id.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Drivers that use the IOCTL API may have the ib_uverbs_file and need a
way to get the related ib_ucontext from it, this is enabled by this
patch.

Downstream patches from this series will use it.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Introduce a new macro to be used for global methods on a singleton
object.

This macros sets internally the type_attrs to be NULL as such an object
can't be created.

Downstream patches from this series will use this macro.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

The ioctl parser framework wrongly assumed that each namespace is
populated. This could lead to NULL dereferences. Fix the parser to
always check that a given namespace indeed exists.

Fixes: fac9658c ("IB/core: Add new ioctl interface")
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Sometimes the uverbs uAPI  doesn't really care about the structure it gets
from user-space. All it wants to do is to allocate enough space and send
it to the hardware/provider driver. Adding a UVERBS_ATTR_MIN_SIZE that
could be used for this scenarios. We use USHRT_MAX as the kernel known
size to bypass any zero validations.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Adding UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY flag to PTR_IN attributes.
By using this flag, the parse automatically allocates and copies the
user-space data. This data is accessible by using uverbs_attr_get_len
and uverbs_attr_get_alloced_ptr inline accessor functions from the
handler.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

uverbs_finalize_objects is currently used only to commit or abort
objects. Since we want to add automatic allocation/free of PTR_IN
attributes, moving it to uverbs_ioctl.c and renamit it to
uverbs_finalize_attrs.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

As provider drivers could use UVERBS_ATTR_FD and UVERBS_ATTR_IDR macros
need to export them.
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

From git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git

* branch 'mellanox/mlx5-next':
  net/mlx5: Expose DEVX specification
  net/mlx5: Prevent warns in dmesg upon firmware commands

This patch updates the mlx5_ifc structures and
command interface to support DEVX.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>

When DEVX is used application builds by itself the command mail box,
this patch prevents warns upon firmware commands as of invalid user
space usage.

In addition,
A failure in destroy_mkey command was changed to be printed only under
debug mode.

This prevents a redundant warn when a memory window was used
with rereg_mr and finally was some kernel cleanup as of reset
flow/process termination.

In that case this command might temporarily fails as part of the cleanup
but finally it expects to succeed.
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>

memcpy() of mapped addresses is done twice in c4iw_create_listen(),
removing the duplicate memcpy().

Fixes: 170003c8 ("iw_cxgb4: remove port mapper related code")
Reviewed-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NPotnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

This patch replaces the ib_device_attr.max_sge with max_send_sge and
max_recv_sge. It allows ulps to take advantage of devices that have very
different send and recv sge depths.  For example cxgb4 has a max_recv_sge
of 4, yet a max_send_sge of 16.  Splitting out these attributes allows
much more efficient use of the SQ for cxgb4 with ulps that use the RDMA_RW
API. Consider a large RDMA WRITE that has 16 scattergather entries.
With max_sge of 4, the ulp would send 4 WRITE WRs, but with max_sge of
16, it can be done with 1 WRITE WR.
Acked-by: NSagi Grimberg <sagi@grimberg.me>
Acked-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NSelvin Xavier <selvin.xavier@broadcom.com>
Acked-by: NShiraz Saleem <shiraz.saleem@intel.com>
Acked-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Before goto err2, the variable qp is checked. So it is not necessary
to check qp in label err2.
Signed-off-by: NZhu Yanjun <yanjun.zhu@oracle.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Set the vlan flag and vlan_id field in the wc for rdma_listen()
to work over VLAN. This is required by ib_init_ah_attr_from_wc()
which is called by the CM REQ handler.
Signed-off-by: NVijay Immanuel <vijayi@attalasystems.com>
Reviewed-by: NYonatan Cohen <yonatanc@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Increase the max MR limit to support more I/O queues
for NVMe over Fabrics hosts.
Signed-off-by: NVijay Immanuel <vijayi@attalasystems.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Allocate agent IDs from a global IDR instead of an atomic variable.
This eliminates the possibility of reusing an ID which is already in
use after 4 billion registrations.  We limit the assigned ID to be less
than 2^24 as the mlx4 driver uses the most significant byte of the agent
ID to store the slave number.  Users unlucky enough to see a collision
between agent numbers and slave numbers see messages like:

 mlx4_ib: egress mad has non-null tid msb:1 class:4 slave:0

and the MAD layer stops working.

We look up the agent under protection of the RCU lock, which means we
have to free the agent using kfree_rcu, and only increment the reference
counter if it is not 0.
Signed-off-by: NMatthew Wilcox <mawilcox@microsoft.com>
Reported-by: NHans Westgaard Ry <hans.westgaard.ry@oracle.com>
Acked-by: NJack Morgenstein <jackm@dev.mellanox.co.il>
Tested-by: NJack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Allow users of the IDR to use the XArray lock for their own
synchronisation purposes.  The IDR continues to rely on the caller to
handle locking, but this lets the caller use the lock embedded in the
IDR data structure instead of allocating their own lock.
Signed-off-by: NMatthew Wilcox <willy@infradead.org>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

For UD the drivers were doing a sgid_index lookup into the cache to get
the attrs, however we can now directly access the same attrs stores in
the ib_ah instead and remove the lookup.
Signed-off-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>