ib_uverbs_get_context does not have a uobject so it does not call the
rdma_lookup_get_uobject which is used to set up the uverbs_attr_bundle
ucontext. For ib_uverbs_get_context we need to set up this manually before
we send the uverbs_attr_bundle down to the driver layer.

This completes the change that was done in commit 70f06b26

 ("IB:
ucontext should be set properly for all cmd & ioctl paths")

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Cited commit introduced the udata parameter to different destroy flows
but the uapi method definition does not have udata (i.e has_udata flag
is not set). As a result, an uninitialized udata struct is being passed
down to the driver callbacks.

Fix that by clearing the driver udata even in cases where has_udata flag
is not set.

Fixes: c4367a26

 ("IB: Pass uverbs_attr_bundle down ib_x destroy path")
Cc: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Co-developed-by: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

The flag update_cur_sg tracks whether contiguous pages from a new set of
page_list pages can be merged into the SGE passed into
ib_umem_add_sg_table(). If this flag is true, but the total segment length
exceeds the max_seg_size supported by HW, we avoid combining to this SGE
and move to a new SGE (x) and merge 'len' pages to it. However, if i <
npages, the next iteration can incorrectly merge 'len' contiguous pages
into x instead of into a new SGE since update_cur_sg is still true.

Reset update_cur_sg to false always after the check to merge pages into
the first SGE passed in to ib_umem_add_sg_table().  Also, prevent a new
SGE's segment length from ever exceeding HW max_seg_sz.

There is a crash on hfi1 as result of this where-in max_seg_sz is
defaulting to 64K. Due to above bug, unfolding SGE's in __ib_umem_release
points to a bad page ptr.

 TEST comp-wfr.perfnative.STL-22166-WDT _ perftest native 2-Write_4097QP_4MB STARTING at 1555387093
 BUG: Bad page state in process ib_write_bw  pfn:7ebca0
 page:ffffcd675faf2800 count:0 mapcount:1 mapping:0000000000000000 index:0x1
 flags: 0x17ffffc0000000()
 raw: 0017ffffc0000000 dead000000000100 dead000000000200 0000000000000000
 raw: 0000000000000001 0000000000000000 0000000000000000 0000000000000000
 page dumped because: nonzero mapcount
 CPU: 18 PID: 15853 Comm: ib_write_bw Tainted: G    B             5.1.0-rc4 #1
 Hardware name: Intel Corporation S2600CWR/S2600CW, BIOS SE5C610.86B.01.01.0014.121820151719 12/18/2015
 Call Trace:
  dump_stack+0x5a/0x73
  bad_page+0xf5/0x10f
  free_pcppages_bulk+0x62c/0x680
  free_unref_page+0x54/0x70
  __ib_umem_release+0x148/0x1a0 [ib_uverbs]
  ib_umem_release+0x22/0x80 [ib_uverbs]
  rvt_dereg_mr+0x67/0xb0 [rdmavt]
  ib_dereg_mr_user+0x37/0x60 [ib_core]
  destroy_hw_idr_uobject+0x1c/0x50 [ib_uverbs]
  uverbs_destroy_uobject+0x2e/0x180 [ib_uverbs]
  uobj_destroy+0x4d/0x60 [ib_uverbs]
  __uobj_get_destroy+0x33/0x50 [ib_uverbs]
  __uobj_perform_destroy+0xa/0x30 [ib_uverbs]
  ib_uverbs_dereg_mr+0x66/0x90 [ib_uverbs]
  ib_uverbs_write+0x3e1/0x500 [ib_uverbs]
  vfs_write+0xad/0x1b0
  ksys_write+0x5a/0xd0
  do_syscall_64+0x5b/0x180
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: d10bcf94

 ("RDMA/umem: Combine contiguous PAGE_SIZE regions in SGEs")
Tested-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Similarly to dev/netdev/etc printk helpers, add standard printk helpers
for the RDMA subsystem.

Example output:
efa 0000:00:06.0 efa_0: Hello World!
efa_0: Hello World! (no parent device set)
(NULL ib_device): Hello World! (ibdev is NULL)

Cc: Jason Baron <jbaron@akamai.com>
Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
Suggested-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

The word 'idr' is scattered throughout the API, so I haven't changed it,
but the 'idr' variable is now an XArray.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Ariel Levkovich says:

====================
The series exposes the ICM address of the receive transport
interface (TIR) of Raw Packet and RSS QPs to the user since they are
required to properly create and insert steering rules that direct flows to
these QPs.
====================

For dependencies this branch is based on mlx5-next from
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux



* branch 'mlx5_tir_icm':
  IB/mlx5: Expose TIR ICM address to user space
  net/mlx5: Introduce new TIR creation core API
  net/mlx5: Expose TIR ICM address in command outbox

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

This patch exposes the TIR ICM address of raw packet and RSS
QPs to user space.

In order to pass the new field, the patch extends the mlx5
specific QP creation response structure and fills it with
the icm address returned by the FW command, if available.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Introducing new TIR creation core API which allows caller
to receive back from the call the full command outbox.

This comes as a preparation for the next patch that will
retrieve the TIR ICM address from the command outbox.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Adding the TIR ICM address to the create_tir command outbox
through which the device reports the ICM address of the newly
created TIR.

The TIR address can be used for direct attachment to a steering
rule in SW managed steering mode.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add SW ICM related fields to the device memory capabilities
structure and sw ownership capability in flow table properties.

The currently supported SW ICM types are steering and header modify
and the changes exposes the device memory capabilities for each
of these two types.

SW ICM memory can be allocated by SW and then be accessed by RDMA
operations for direct management of the HW packet handling tables.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Jason Gunthorpe says:

====================
Upon review it turns out there are some long standing problems in BAR
mapping area:
 * BAR pages intended for read-only can be switched to writable via mprotect.
 * Missing use of rdma_user_mmap_io for the mlx5 clock BAR page.
 * Disassociate causes SIGBUS when touching the pages.
 * CPU pages are being mapped through to the process via remap_pfn_range
   instead of the more appropriate vm_insert_page, causing weird behaviors
   during disassociation.

This series adds the missing VM_* flag manipulation, adds faulting a zero
page for disassociation and revises the CPU page mappings to use
vm_insert_page.
====================

For dependencies this branch is based on for-rc from
git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git



* branch 'rdma_mmap':
  RDMA: Remove rdma_user_mmap_page
  RDMA/mlx5: Use get_zeroed_page() for clock_info
  RDMA/ucontext: Fix regression with disassociate
  RDMA/mlx5: Use rdma_user_map_io for mapping BAR pages
  RDMA/mlx5: Do not allow the user to write to the clock page

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Upon further research drivers that want this should simply call the core
function vm_insert_page(). The VMA holds a reference on the page and it
will be automatically freed when the last reference drops. No need for
disassociate to sequence the cleanup.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

get_zeroed_page() returns a virtual address for the page which is better
than allocating a struct page and doing a permanent kmap on it.

Cc: stable@vger.kernel.org
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

When this code was consolidated the intention was that the VMA would
become backed by anonymous zero pages after the zap_vma_pte - however this
very subtly relied on setting the vm_ops = NULL and clearing the VM_SHARED
bits to transform the VMA into an anonymous VMA. Since the vm_ops was
removed this broke.

Now userspace gets a SIGBUS if it touches the vma after disassociation.

Instead of converting the VMA to anonymous provide a fault handler that
puts a zero'd page into the VMA when user-space touches it after
disassociation.

Cc: stable@vger.kernel.org
Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
Fixes: 5f9794dc

 ("RDMA/ucontext: Add a core API for mmaping driver IO memory")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Since mlx5 supports device disassociate it must use this API for all
BAR page mmaps, otherwise the pages can remain mapped after the device
is unplugged causing a system crash.

Cc: stable@vger.kernel.org
Fixes: 5f9794dc

 ("RDMA/ucontext: Add a core API for mmaping driver IO memory")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

The intent of this VMA was to be read-only from user space, but the
VM_MAYWRITE masking was missed, so mprotect could make it writable.

Cc: stable@vger.kernel.org
Fixes: 5c99eaec

 ("IB/mlx5: Mmap the HCA's clock info to user-space")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

The bit VCRCErr in the receive header flag is actually a
reserved field. Remove bit operations on this field.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: John Fleck <john.fleck@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

These counters are required for error analysis and debug.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

The reference count adjustments on reference count completion
are open coded throughout.

Add a routine to do all reference count adjustments and use.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

QP creation already records the allowed_ops.

Take advantage of that single field to replace multiple qp_type
specific tests.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

The currently include file ordering for rdmavt headers has an
ab/ba include issue the precludes using inlines from rdma_vt.h
in rdmavt_qp.h.

At the heart of the issue is that rdma_vt.h includes rdmavt_qp.h.

Fix the ordering issue by adjusting rdma_vt.h to not require rdmavt_qp.h
and move qp related inlines to rdmavt_qp.h.

Additionally, promote rvt_mmap_info to rdma_vt.h since it is shared
by rdmavt_cq.h and rdmavt_qp.h.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

The opfn.h include file build-ablility depends on the including file
having the correct includes.

Fix by making opfn.h self sufficient.

Reviewed-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

This patch fixes miscellaneous comment errors.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Some kernels now enable CONFIG_IO_STRICT_DEVMEM which prevents multiple
handles to PCI resource0. In order to continue to support expansion ROM
updates while the driver is loaded, the driver must now provide an
interface to control the expansion ROM write protection.

This patch adds an exprom_wp debugfs interface that allows the hfi1_eprom
user tool to disable the expansion ROM write protection by opening the
file and writing a '1'.  The write protection is released when writing a
'0' or automatically re-enabled when the file handle is closed.  The
current implementation will only allow one handle to be opened at a time
across all hfi1 devices.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Josh Collier <josh.d.collier@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Verbs destroy callbacks are synchronous operations and can't be delayed.
The expectation is that after driver returned from destroy function, the
memory can be freed and user won't be able to access it again.

Ditch workqueue implementation used in HNS driver.

Fixes: d838c481

 ("IB/hns: Fix the bug when destroy qp")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: oulijun <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

When two netdev have same link local addresses (such as vlan and non
vlan), two rdma cm listen id should be able to bind to following different
addresses.

listener-1: addr=lla, scope_id=A, port=X
listener-2: addr=lla, scope_id=B, port=X

However while comparing the addresses only addr and port are considered,
due to which 2nd listener fails to listen.

In below example of two listeners, 2nd listener is failing with address in
use error.

$ rping -sv -a fe80::268a:7ff:feb3:d113%ens2f1 -p 4545&

$ rping -sv -a fe80::268a:7ff:feb3:d113%ens2f1.200 -p 4545
rdma_bind_addr: Address already in use

To overcome this, consider the scope_ids as well which forms the accurate
IPv6 link local address.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

IPv6 link local address for a VLAN netdevice has nothing to do with its
resemblance with the default GID, because VLAN link local GID is in
different layer 2 domain.

Now that RoCE MAD packet processing and route resolution consider the
right GID index, there is no need for an unnecessary check which prevents
the addition of vlan based IPv6 link local GIDs.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Linux 5.1-rc1

We forgot to reset the branch last merge window thus mlx5-next is outdated
and still based on 5.0-rc2. This merge commit is needed to sync mlx5-next
branch with 5.1-rc1.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Switchdev mode and mutiport RoCE mode aren't compatible at this point.
Don't create IB reps when a user switches to switchdev mode and the driver
operates in that mode.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

When working in mutliport RoCE mode it is possible to attach a slave
before the master. In that case the slave is waiting for a master to be
attached.  When the master is attached it goes over the list of waiting
slaves, finds a slave that is compatible and tries to bind it to itself.

The call stack is:
mlx5_ib_init_multiport_master() -> mlx5_ib_bind_slave_port()

In the bind function we will create a netdev notifier, but this is done
before we initialize the RoCE structure (this is done at a later stage by
the master in the ROCE stage).

Once events are delivered to that notifier we will use
mlx5_ib_get_native_port_mdev() to get the actual port and as the native
port is zero we will access an invalid index in the port structure.

Move the RoCE structure initialization to an earlier stage.

Fixes: 32f69e4b

 ("{net, IB}/mlx5: Manage port association for multiport RoCE")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Remove the limitations that were in place and provide support for DEVX and
raw flow creation on reps.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Add MLX5_OP_QUERY_ESW_VPORT_CONTEXT to devx white list. It will be allowed
only if HCA_CAP.eswitch_manager==1.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Allow this only via mlx5 raw create flow API, legacy verbs are not
supported. To accommodate that, we add a new attribute to matcher creation
to indicate the type of flow table to be used.
	MLX5_IB_ATTR_FLOW_MATCHER_FT_TYPE
With this new attribute MLX5_IB_ATTR_FLOW_MATCHER_FLOW_FLAGS is no longer
needed, we keep it for compatibility but at most only a single attribute can
be passed of the two.

When inserting a flow rule to the FDB we require that a DEVX FT is
provided as a destination, no other configuration is allowed.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Instead of failing the request, just use the supported number of flow
entries.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Now that we have a specific prio inside the FDB namespace allow retrieving
it from the RDMA side.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Provide an option to change the net namespace of a rdma device through a
netlink command. When multiple rdma devices exists in a system, and when
containers are used, this will limit rdma device visibility to a specified
net namespace.

An example command to change net namespace of mlx5_1 device to the
previously created net namespace 'foo' is:

$ ip netns add foo
$ rdma dev set mlx5_1 netns foo

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Introduce a helper function that changes rdma device's net namespace which
performs mini disable/enable sequence to have device visible only in
assigned net namespace.

Device unregistration, device rename and device change net namespace
may be invoked concurrently.

(a) device unregistration needs to wait if a device change (rename or net
    namespace change) operation is in progress.
(b) device net namespace change should not proceed if the unregistration
    has started.
(c) while one cpu is changing device net namespace, other cpu should not
    be able to rename or change net namespace.

To address above concurrency,
(a) Use unreg_mutex to synchronize between ib_unregister_device() and net
    namespace change operation
(b) In cases where unregister_device() has started unregistration before
    change_netns got chance to acquire unreg_mutex, validate the refcount
    - if it dropped to zero, abort the net namespace change operation.

Finally use the helper function to change net namespace of ib device to
move the device back to init_net when such net is deleted.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

So we can use the disable_device() helper while changing the net namespace
of the rdma device in a subsequent patch, move free_netdevs() out of it.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Fix typo 'faspath' -> 'pastpath'.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>