Commit Graph

811878 Commits

Author SHA1 Message Date
Jason Gunthorpe
9a7786784d RDMA/uverbs: Fix an error flow in ib_uverbs_poll_cq
The new output_written block was wrongly placed before the ret=0, causing
the error code to be lost. uverbs_output_written is not expected to fail,
and even if it does fail it has no significant impact on the userspace
flow.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Fixes: d6f4a21f30 ("RDMA/uverbs: Mark ioctl responses with UVERBS_ATTR_F_VALID_OUTPUT")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
2019-02-15 15:54:46 -07:00
Shamir Rabinovitch
8994445054 IB/{hw,sw}: Remove 'uobject->context' dependency in object creation APIs
Now when we have the udata passed to all the ib_xxx object creation APIs
and the additional macro 'rdma_udata_to_drv_context' to get the
ib_ucontext from ib_udata stored in uverbs_attr_bundle, we can finally
start to remove the dependency of the drivers in the
ib_xxx->uobject->context.

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-15 15:38:38 -07:00
Shamir Rabinovitch
730623f4a5 IB/verbs: Add helper function rdma_udata_to_drv_context
Helper function to get driver's context out of ib_udata wrapped in
uverbs_attr_bundle for user objects or NULL for kernel objects.

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-15 11:17:25 -07:00
Shamir Rabinovitch
3d9dfd0603 IB/uverbs: Add ib_ucontext to uverbs_attr_bundle sent from ioctl and cmd flows
Add ib_ucontext to the uverbs_attr_bundle sent down the iocl and cmd flows
as soon as the flow has ib_uobject.

In addition, remove rdma_get_ucontext helper function that is only used by
ib_umem_get.

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-15 11:16:21 -07:00
Erez Alfasi
0dd9ce18b9 IB/ipoib: Use __func__ instead of function's name
Changed debug statements to use %s and __func__ instead
of hard-coded function's name.

Signed-off-by: Erez Alfasi <ereza@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 14:48:58 -07:00
YueHaibing
36f0a1ccb3 RDMA/iwpm: Remove set but not used variable 'msg_seq'
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/infiniband/core/iwpm_util.c: In function 'iwpm_send_hello':
drivers/infiniband/core/iwpm_util.c:811:6: warning:
 variable 'msg_seq' set but not used [-Wunused-but-set-variable]

It never used since introduction in commit b0bad9ad51 ("RDMA/IWPM:
Support no port mapping requirements")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 14:47:39 -07:00
Lijun Ou
dad1f9802e RDMA/hns: Configure capacity of hns device
This patch adds new device capability for IB_DEVICE_MEM_MGT_EXTENSIONS to
indicate device support for the following features:

1. Fast register memory region.
2. send with remote invalidate by frmr
3. local invalidate memory regsion

As well as adds the max depth of frmr page list len.

Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 13:20:19 -07:00
Yixian Liu
e95c716c7f RDMA/hns: Delete useful prints for aeq subtype event
Current all messages printed for aeq subtype event are wrong.  Thus,
delete them and only the value of subtype event is printed.

Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 13:20:19 -07:00
Yixian Liu
f7f27a5f03 RDMA/hns: Set allocated memory to zero for wrid
The memory allocated for wrid should be initialized to zero.

Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 13:20:19 -07:00
Yixian Liu
ab22bf0521 RDMA/hns: Fix the state of rereg mr
The state of mr after reregister operation should be set to valid
state. Otherwise, it will keep the same as the state before reregistered.

Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 13:20:18 -07:00
chenglang
704e0e613a RDMA/hns: Limit minimum ROCE CQ depth to 64
This patch modifies the minimum CQ depth specification of hip08 and is
consistent with the processing of hip06.

Signed-off-by: chenglang <chenglang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-14 13:20:18 -07:00
Shiraz, Saleem
52a572e9f7 RDMA/nes: Use for_each_sg_dma_page iterator for umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-13 09:00:43 -07:00
Shiraz, Saleem
36d577089d RDMA/rdmavt: Adapt to handle non-uniform sizes on umem SGEs
rdmavt expects a uniform size on all umem SGEs which is currently at
PAGE_SIZE.

Adapt to a umem API change which could return non-uniform sized SGEs due
to combining contiguous PAGE_SIZE regions into an SGE. Use
for_each_sg_page variant to unfold the larger SGEs into a list of
PAGE_SIZE elements.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-13 09:00:43 -07:00
Colin Ian King
e8ac9389f0 RDMA: Fix allocation failure on pointer pd
The null check on an allocation failure on pd is currently checking
if pd is non-null rather than null. Fix this by adding the missing !
operator.

Fixes: 21a428a019 ("RDMA: Handle PD allocations by IB/core")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-13 09:00:43 -07:00
Doug Ledford
d892273bb5 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma into for-next
I had merged the hfi1-tid code into my local copy of for-next, but was
waiting on 0day testing before pushing it (I pushed it to my wip
branch).  Having waited several days for 0day testing to show up, I'm
finally just going to push it out.  In the meantime, though, Jason
pushed other stuff to for-next, so I needed to merge up the branches
before pushing.

Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-02-13 09:35:39 -05:00
Colin Ian King
a87145957e RDMA/bnxt_re: fix or'ing of data into an uninitialized struct member
The struct member comp_mask has not been initialized however a bit
pattern is being bitwise or'd into the member and hence other bit
fields in comp_mask may contain any garbage from the stack. Fix this
by making the bitwise or into an assignment.

Fixes: 95b86d1c91 ("RDMA/bnxt_re: Update kernel user abi to pass chip context")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:34:54 -07:00
Mark Bloch
fc9e4477f9 RDMA/mlx5: Fix memory leak in case we fail to add an IB device
Make sure the IB device is freed on failure.

Fixes: b5ca15ad7e ("IB/mlx5: Add proper representors support")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:32:29 -07:00
Yishai Hadas
0da4d48d99 IB/mlx5: Fix bad flow upon DEVX mkey creation
Fix bad flow upon DEVX mkey creation to prevent deleting the indirect mkey
from the radix tree in case there was a previous failure to insert it.

Fixes: 534fd7aac5 ("IB/mlx5: Manage indirection mkey upon DEVX flow for ODP")
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:30:40 -07:00
Shiraz, Saleem
8317d6cdc1 RDMA/rxe: Use for_each_sg_page iterator on umem SGL
The driver walks the umem SGL assuming a 1:1 mapping between SGE and
system page. Update to use the for_each_sg_page iterator to get individual
pages contained in the SGEs.  This is a pre-requisite before adding page
combining into SGEs while building the scatter table in IB core.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:24:55 -07:00
Shiraz, Saleem
be8c456abf RDMA/ocrdma: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:24:55 -07:00
Shiraz, Saleem
95ad233ffb RDMA/qedr: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Acked-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:24:55 -07:00
Shiraz, Saleem
f3e6d31179 RDMA/vmw_pvrdma: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:24:55 -07:00
Shiraz, Saleem
b44e47eb06 RDMA/cxgb3: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:24:55 -07:00
Shiraz, Saleem
48b586ac36 RDMA/cxgb4: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:24:55 -07:00
Shiraz, Saleem
3856ec5527 RDMA/hns: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:02:33 -07:00
Shiraz, Saleem
43fae91276 RDMA/i40iw: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:02:33 -07:00
Shiraz, Saleem
8d249af3e6 RDMA/mthca: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:02:33 -07:00
Shiraz, Saleem
161ebe2498 RDMA/bnxt_re: Use for_each_sg_dma_page iterator on umem SGL
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped
SGL and get the page DMA address. This avoids the extra loop to iterate
pages in the SGE when for_each_sg iterator is used.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:02:33 -07:00
Jason Gunthorpe
d901b2760d lib/scatterlist: Provide a DMA page iterator
Commit 2db76d7c3c ("lib/scatterlist: sg_page_iter: support sg lists w/o
backing pages") introduced the sg_page_iter_dma_address() function without
providing a way to use it in the general case. If the sg_dma_len() is not
equal to the sg length callers cannot safely use the
for_each_sg_page/sg_page_iter_dma_address combination.

Resolve this API mistake by providing a DMA specific iterator,
for_each_sg_dma_page(), that uses the right length so
sg_page_iter_dma_address() works as expected with all sglists.

A new iterator type is introduced to provide compile-time safety against
wrongly mixing accessors and iterators.

Acked-by: Christoph Hellwig <hch@lst.de> (for scatterlist)
Acked-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> (ipu3-cio2)
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11 15:02:33 -07:00
Doug Ledford
82771f2033 Merge branch 'wip/dl-for-next' into for-next
Due to concurrent work by myself and Jason, a normal fast forward merge
was not possible.  This brings in a number of hfi1 changes, mainly the
hfi1 TID RDMA support (roughly 10,000 LOC change), which was reviewed
and integrated over a period of days.

Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-02-09 12:54:04 -05:00
Doug Ledford
416fbc1bba Merge branch 'hfi1-tid' into wip/dl-for-next
Omni-Path TID RDMA Feature

Intel Omni-Path (OPA) TID RDMA support is a feature that accelerates
data movement between two OPA nodes through the IB Verbs interface. It
improves RDMA READ/WRITE performance by delivering the data payload to a
user buffer directly without any software copying.

Architecture
=============
The TID RDMA protocol is implemented on the hfi1 driver level and is
therefore transparent to the ULPs. It is designed to facilitate the data
transactions for two specific RDMA requests:
  - RDMA READ;
  - RDMA WRITE.
Previously, when a verbs data packet is received at the destination
(requester side for RDMA READ and responder side for RDMA WRITE), the
data payload is copied to the user buffer by software, which slows down
the performance significantly for large requests.

Internally, hfi1 converts qualified RDMA READ/WRITE requests into TID
RDMA READ/WRITE requests when the requests are post sent to the hfi1
driver. Non-qualified RDMA requests are handled by normal RDMA protocol.

For TID RDMA requests, hardware resources (hardware flow and TID entries)
are allocated on the destination side (the requester side for TID RDMA
READ and the responder side for TID RDMA WRITE). The information for
these resources is conveyed to the data source side (the responder side
for TID RDMA READ and the requester side for TID RDMA WRITE) and embedded
in data packets. When data packets are received by the destination,
hardware will deliver the data payload to the destination buffer without
involving software and therefore improve the performance.

Details
=======
RDMA READ/WRITE requests are qualified by the following:
  - Total data length >= 256k;
  - Totoal data length is a multiple of 4K pages.

Additional qualifications are enforced for the destination buffers:
  For RDMA RAED:
    - Each destination sge buffer is 4K aligned;
    - Each destination sge buffer is a multiple of 4K pages.
  For RDMA WRITE:
    - The destination number is 4K aligned.

In addition, in an OPA fabric, some nodes may support TID RDMA while
others may not. As such, it is important for two transaction nodes to
exchange the information about the features they support. This discovery
mechanism is called OPA Feature Negotion (OPFN) and is described in
details in the patch series. Through OPFN, two nodes can find whether
they both support TID RDMA and subsequently convert RDMA requests into
TID RDMA requests.

* hfi1-tid: (46 commits)
  IB/hfi1: Prioritize the sending of ACK packets
  IB/hfi1: Add static trace for TID RDMA WRITE protocol
  IB/hfi1: Enable TID RDMA WRITE protocol
  IB/hfi1: Add interlock between TID RDMA WRITE and other requests
  IB/hfi1: Add TID RDMA WRITE functionality into RDMA verbs
  IB/hfi1: Add the dual leg code
  IB/hfi1: Add the TID second leg ACK packet builder
  IB/hfi1: Add the TID second leg send packet builder
  IB/hfi1: Resend the TID RDMA WRITE DATA packets
  IB/hfi1: Add a function to receive TID RDMA RESYNC packet
  IB/hfi1: Add a function to build TID RDMA RESYNC packet
  IB/hfi1: Add TID RDMA retry timer
  IB/hfi1: Add a function to receive TID RDMA ACK packet
  IB/hfi1: Add a function to build TID RDMA ACK packet
  IB/hfi1: Add a function to receive TID RDMA WRITE DATA packet
  IB/hfi1: Add a function to build TID RDMA WRITE DATA packet
  IB/hfi1: Add a function to receive TID RDMA WRITE response
  IB/hfi1: Add TID resource timer
  IB/hfi1: Add a function to build TID RDMA WRITE response
  IB/hfi1: Add functions to receive TID RDMA WRITE request
  ...

Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-02-09 12:50:02 -05:00
Raju Rangoju
f368ff188a iw_cxgb4: fix srqidx leak during connection abort
When an application aborts the connection by moving QP from RTS to ERROR,
then iw_cxgb4's modify_rc_qp() RTS->ERROR logic sets the
*srqidxp to 0 via t4_set_wq_in_error(&qhp->wq, 0), and aborts the
connection by calling c4iw_ep_disconnect().

c4iw_ep_disconnect() does the following:
 1. sends up a close_complete_upcall(ep, -ECONNRESET) to libcxgb4.
 2. sends abort request CPL to hw.

But, since the close_complete_upcall() is sent before sending the
ABORT_REQ to hw, libcxgb4 would fail to release the srqidx if the
connection holds one. Because, the srqidx is passed up to libcxgb4 only
after corresponding ABORT_RPL is processed by kernel in abort_rpl().

This patch handle the corner-case by moving the call to
close_complete_upcall() from c4iw_ep_disconnect() to abort_rpl().  So that
libcxgb4 is notified about the -ECONNRESET only after abort_rpl(), and
libcxgb4 can relinquish the srqidx properly.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 17:02:05 -07:00
Raju Rangoju
11a27e2121 iw_cxgb4: complete the cached SRQ buffers
If TP fetches an SRQ buffer but ends up not using it before the connection
is aborted, then it passes the index of that SRQ buffer to the host in
ABORT_REQ_RSS or ABORT_RPL CPL message.

But, if the srqidx field is zero in the received ABORT_RPL or
ABORT_REQ_RSS CPL, then we need to read the tcb.rq_start field to see if
it really did have an RQE cached. This works around a case where HW does
not include the srqidx in the ABORT_RPL/ABORT_REQ_RSS CPL.

The final value of rq_start is the one present in TCB with the
TF_RX_PDU_OUT bit cleared. So, we need to read the TCB, examine the
TF_RX_PDU_OUT (bit 49 of t_flags) in order to determine if there's a rx
PDU feedback event pending.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 17:02:05 -07:00
Raju Rangoju
e381a1cb65 cxgb4: add tcb flags and tcb rpl struct
This patch adds the tcb flags and structures needed for querying tcb
information.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 17:02:05 -07:00
Jason Gunthorpe
921eab1143 RDMA/devices: Re-organize device.c locking
The locking here started out with a single lock that covered everything
and then has lately veered into crazy town.

The fundamental problem is that several places need to iterate over a
linked list, but also need to drop their locks to avoid deadlock during
client callbacks.

xarray's restartable iteration offers a simple solution to the
problem. Once all the lists are xarrays we can drop locks in the places
that need that and rely on xarray to provide consistency and locking for
the data structure.

The resulting simplification is that each of the three lists has a
dedicated rwsem that must be held when working with the list it
covers. One data structure is no longer covered by multiple locks.

The sleeping semaphore is selected because the read side generally needs
to be held over something sleeping, and using RCU reader locking in those
cases is overkill.

In the process this simplifies the entire registration/unregistration flow
to be the expected list of setups and the reversed list of matching
teardowns, and the registration lock 'refcount' can now be revised to be
released after the ULPs are removed, providing a very sane semantic for
this feature.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
0df91bb673 RDMA/devices: Use xarray to store the client_data
Now that we have a small ID for each client we can use xarray instead of
linearly searching linked lists for client data. This will give much
faster and scalable client data lookup, and will lets us revise the
locking scheme.

Since xarray can store 'going_down' using a mark just entirely eliminate
the struct ib_client_data and directly store the client_data value in the
xarray. However this does require a special iterator as we must still
iterate over any NULL client_data values.

Also eliminate the client_data_lock in favour of internal xarray locking.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
e59178d895 RDMA/devices: Use xarray to store the clients
This gives each client a unique ID and will let us move client_data to use
xarray, and revise the locking scheme.

clients have to be add/removed in strict FIFO/LIFO order as they
interdepend. To support this the client_ids are assigned to increase in
FIFO order. The existing linked list is kept to support reverse iteration
until xarray can get a reverse iteration API.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
3b88afd38e RDMA/device: Use an ida instead of a free page in alloc_name
ida is the proper data structure to hold list of clustered small integers
and then allocate an unused integer. Get rid of the convoluted and limited
open-coded bitmap.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
652432f33c RDMA/device: Get rid of reg_state
This really has no purpose anymore, refcount can be used to tell if the
device is still registered. Keeping it around just invites mis-use.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
d45f89d59b RDMA/device: Call ib_cache_release_one() only from ib_device_release()
Instead of complicated logic about when this memory is freed, always free
it during device release(). All the cache pointers start out as NULL, so
it is safe to call this before the cache is initialized.

This makes for a simpler error unwind flow, and a simpler understanding of
the lifetime of the memory allocations inside the struct ib_device.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
b34b269ad8 RDMA/device: Ensure that security memory is always freed
Since this only frees memory it should be done during the release
callback. Otherwise there are possible error flows where it might not get
called if registration aborts.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:56:45 -07:00
Jason Gunthorpe
e3593b568a RDMA/device: Check that the rename is nop under the lock
Since another rename could be running in parallel it is safer to check
that the name is not changing inside the lock, where we already know the
device name will not change.

Fixes: d21943dd19 ("RDMA/core: Implement IB device rename function")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
2019-02-08 16:56:45 -07:00
Leon Romanovsky
21a428a019 RDMA: Handle PD allocations by IB/core
The PD allocations in IB/core allows us to simplify drivers and their
error flows in their .alloc_pd() paths. The changes in .alloc_pd() go hand
in had with relevant update in .dealloc_pd().

We will use this opportunity and convert .dealloc_pd() to don't fail, as
it was suggested a long time ago, failures are not happening as we have
never seen a WARN_ON print.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:51:04 -07:00
Leon Romanovsky
30471d4b20 RDMA/core: Share driver structure size with core
Add new macros to be used in drivers while registering ops structure and
IB/core while calling allocation routines, so drivers won't need to
perform kzalloc/kfree in their paths.

The change in allocation stage allows us to initialize common fields prior
to calling to drivers (e.g. restrack).

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:50:58 -07:00
Daniel Jurgens
c66f67414c IB/core: Don't register each MAD agent for LSM notifier
When creating many MAD agents in a short period of time, receive packet
processing can be delayed long enough to cause timeouts while new agents
are being added to the atomic notifier chain with IRQs disabled.  Notifier
chain registration and unregstration is an O(n) operation. With large
numbers of MAD agents being created and destroyed simultaneously the CPUs
spend too much time with interrupts disabled.

Instead of each MAD agent registering for it's own LSM notification,
maintain a list of agents internally and register once, this registration
already existed for handling the PKeys. This list is write mostly, so a
normal spin lock is used vs a read/write lock. All MAD agents must be
checked, so a single list is used instead of breaking them down per
device.

Notifier calls are done under rcu_read_lock, so there isn't a risk of
similar packet timeouts while checking the MAD agents security settings
when notified.

Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:24:44 -07:00
Daniel Jurgens
805b754d49 IB/core: Eliminate a hole in MAD agent struct
Move the security related fields above the u8s to eliminate a hole in the
struct.

pahole before:
struct ib_mad_agent {
...
u32                        hi_tid;               /*    48     4 */
u32                        flags;                /*    52     4 */
u8                         port_num;             /*    56     1 */
u8                         rmpp_version;         /*    57     1 */

/* XXX 6 bytes hole, try to pack */

/* --- cacheline 1 boundary (64 bytes) --- */
void *                     security;             /*    64     8 */
bool                       smp_allowed;          /*    72     1 */
bool                       lsm_nb_reg;           /*    73     1 */

/* XXX 6 bytes hole, try to pack */

struct notifier_block      lsm_nb;               /*    80    24 */

/* XXX last struct has 4 bytes of padding */

/* size: 104, cachelines: 2, members: 14 */
...
};

pahole after:
struct ib_mad_agent {
...
u32                        hi_tid;               /*    48     4 */
u32                        flags;                /*    52     4 */
void *                     security;             /*    56     8 */
/* --- cacheline 1 boundary (64 bytes) --- */
struct notifier_block      lsm_nb;               /*    64    24 */

/* XXX last struct has 4 bytes of padding */

u8                         port_num;             /*    88     1 */
u8                         rmpp_version;         /*    89     1 */
bool                       smp_allowed;          /*    90     1 */
bool                       lsm_nb_reg;           /*    91     1 */

/* size: 96, cachelines: 2, members: 14 */
...
};

Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:24:44 -07:00
Daniel Jurgens
6e88e672b6 IB/core: Fix potential memory leak while creating MAD agents
If the MAD agents isn't allowed to manage the subnet, or fails to register
for the LSM notifier, the security context is leaked. Free the context in
these cases.

Fixes: 47a2b338fe ("IB/core: Enforce security on management datagrams")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Reported-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:24:44 -07:00
Daniel Jurgens
d60667fc39 IB/core: Unregister notifier before freeing MAD security
If the notifier runs after the security context is freed an access of
freed memory can occur.

Fixes: 47a2b338fe ("IB/core: Enforce security on management datagrams")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:24:44 -07:00
Parvi Kaustubhi
0c23660649 IB/usnic: Fix locking when unregistering
Move the call to usnic_ib_device_remove after usnic_ib_ibdev_list_lock has
been released.

Signed-off-by: Parvi Kaustubhi <pkaustub@cisco.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:21:59 -07:00
Steve Wise
c8a7eb554a iw_cxgb4: use tos when finding ipv6 routes
When IPv6 support was added, the correct tos was not passed to
cxgb_find_route6(). This potentially results in the wrong route entry.

Fixes: 830662f6f0 ("RDMA/cxgb4: Add support for active and passive open connection with IPv6 address")
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:18:06 -07:00