Commit Graph

18 Commits

Author SHA1 Message Date
Shiraz Saleem 47fb3c1610 i40iw: Prevent multiple netdev event notifier registrations
Netdev event notifier registration/de-registration is not
synchronized with a lock and there is a possibility of a
duplicate registration of notifier before the unregister
completes.

Register netdev event notifiers during module init and
de-register them at module exit.

This avoids the need to tie the registration to first netdev
client interface open and de-registration to last client
interface close and the synchronization to achieve it.

This also fixes a crash due to duplicate registration.

BUG: unable to handle kernel paging request at ffffffffa0d60388
IP: [<ffffffff8160f75d>] notifier_call_chain+0x3d/0x70
PGD 190d067 PUD 190e063 PMD 76c840067 PTE 0
Oops: 0000 [#1] SMP
Modules linked in: i40e(OF-) fuse btrfs zlib_deflate raid6_pq xor vfat msdos
[..]
e1000e vxlan ip_tunnel ptp pps_core i2c_core video [last unloaded: i40iw]
CPU: 1 PID: 27101 Comm: modprobe Tainted: GF       W  O--------------   3.10.0-229.el7.x86_64 #1
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Q87M-D2H, BIOS F7 01/17/2014
task: ffff88076e8a96c0 ti: ffff8806959c8000 task.ti: ffff8806959c8000
RIP: 0010:[<ffffffff8160f75d>]  [<ffffffff8160f75d>] notifier_call_chain+0x3d/0x70
RSP: 0018:ffff8806959cbb38  EFLAGS: 00010282
RAX: ffffffffa0d60380 RBX: 00000000fffffffd RCX: 0000000000000000
0708] RDX: 0000000000000000 RSI: ffff88081227a000 RDI: 0000000000000002
RBP: ffff8806959cbb60 R08: 0000000000000246 R09: 000000000000700c
R10: ffff88080e16ea40 R11: 00000000000ae8df R12: ffffffffa0d60380
R13: 0000000000000002 R14: ffff88076e738800 R15: 0000000000000000
FS:  00007f604ef4a740(0000) GS:ffff88083e240000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa0d60388 CR3: 0000000753cd2000 CR4: 00000000001407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffffffff819e73a0 0000000000000000 0000000000000002 ffff88076e738800
00000000ffffffff ffff8806959cbba0 ffffffff8109d61d 0000000000000000
0000000000000000 ffff88076e738800 0000000000000000 ffff88076e738800
Call Trace:
[<ffffffff8109d61d>] __blocking_notifier_call_chain+0x4d/0x70
[<ffffffff8109d656>] blocking_notifier_call_chain+0x16/0x20
[<ffffffff8156b9e4>] __inet_del_ifa+0x154/0x2b0
[<ffffffff8156d102>] inetdev_event+0x182/0x530
[<ffffffff8160f76c>] notifier_call_chain+0x4c/0x70
[<ffffffff8109d446>] raw_notifier_call_chain+0x16/0x20
[<ffffffff814f71fd>] call_netdevice_notifiers+0x2d/0x60
[<ffffffff814f8845>] rollback_registered_many+0x105/0x220
[<ffffffff814f89a0>] rollback_registered+0x40/0x70
[<ffffffff814f9c88>] unregister_netdevice_queue+0x48/0x80
[<ffffffff814f9cdc>] unregister_netdev+0x1c/0x30
[<ffffffffa0067139>] i40e_vsi_release+0x2a9/0x2b0 [i40e]
[<ffffffffa00674e8>] i40e_remove+0x128/0x2b0 [i40e]
[<ffffffff813092db>] pci_device_remove+0x3b/0xb0
[<ffffffff813d26ef>] __device_release_driver+0x7f/0xf0
[<ffffffff813d3068>] driver_detach+0xb8/0xc0
[<ffffffff813d22db>] bus_remove_driver+0x9b/0x120
[<ffffffff813d36dc>] driver_unregister+0x2c/0x50
[<ffffffff81307d4c>] pci_unregister_driver+0x2c/0x90
[<ffffffffa008f9d0>] i40e_exit_module+0x10/0x23 [i40e]
[<ffffffff810dad0b>] SyS_delete_module+0x16b/0x2d0
[<ffffffff81013b0c>] ? do_notify_resume+0x9c/0xb0
[<ffffffff81613da9>] system_call_fastpath+0x16/0x1b
Code: e5 41 57 4d 89 c7 41 56 49 89 d6 41 55 49 89 f5 41 54 53 89 cb
75 14 eb 3d 0f 1f 44 00 00 83 eb 01 74 25 4d 85 e4 74 20 4c 89 e0 <4c>
8b 60 08 4c 89 f2 4c 89 ee 48 89 c7 ff 10 4d 85 ff 74 04 41
RIP  [<ffffffff8160f75d>] notifier_call_chain+0x3d/0x70

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-09-22 13:43:36 -04:00
Shiraz Saleem 44b99f88cd i40iw: Avoid memory leak of CQP request objects
Control Queue Pair (CQP) request objects, which have
not received a completion upon interface close, remain
in memory.

To fix this, identify and free all pending CQP request
objects during destroy CQP OP.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-07-20 11:20:49 -04:00
Henry Orosco d6f7bbcc2e i40iw: Reorganize structures to align with HW capabilities
Some resources are incorrectly organized and at odds with
HW capabilities. Specifically, ILQ, IEQ, QPs, MSS, QOS
and statistics belong in a VSI.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-12 17:20:29 -05:00
Shiraz Saleem 1cda28bb5b i40iw: Fix QP flush to not hang on empty queues or failure
When flush QP and there are no pending work requests, signal completion
to unblock i40iw_drain_sq and i40iw_drain_rq which are waiting on
completion for iwqp->sq_drained and iwqp->sq_drained respectively.
Also, signal completion if flush QP fails to prevent the drain SQ or RQ
from being blocked indefintely.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-12 17:20:27 -05:00
Mustafa Ismail f4a87ca12a i40iw: Fix double free of QP
A QP can be double freed if i40iw_cm_disconn() is
called while it is currently being freed by
i40iw_rem_ref(). The fix in i40iw_cm_disconn() will
first check if the QP is already freed before
making another request for the QP to be freed.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-12 17:20:26 -05:00
Henry Orosco 78300cf815 i40iw: Add request for reset on CQP timeout
When CQP times out, send a request to LAN driver for reset.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-05 16:09:44 -05:00
Mustafa Ismail d59659340c i40iw: Add missing cleanup on device close
On i40iw device close, disconnect all connected QPs by moving
them to error state; and block further QPs, PDs and CQs from
being created. Additionally, make sure all resources have been
freed before deallocating the ibdev as part of the device close.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-05 16:09:40 -05:00
Henry Orosco 85a87c90ee i40iw: Query device accounts for internal rsrc
Some resources are consumed internally and not available to the user.
After hw is initialized, figure out how many resources are consumed
and subtract those numbers from the initial max device capability in
i40iw_query_device().

Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-05 16:09:35 -05:00
Henry Orosco 0fc2dc5889 i40iw: Add Quality of Service support
Add support for QoS on QPs. Upon device initialization,
a map is created from user priority to queue set
handles. On QP creation, use ToS to look up the queue
set handle for use with the QP.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-03 15:24:51 -05:00
Mustafa Ismail 44856be3e9 i40iw: Protect req_resource_num update
In i40iw_alloc_resource(), ensure that the update to
req_resource_num is protected by the lock.

Fixes: 8e06af711b ("i40iw: add main, hdr, status")

Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-08-23 12:40:20 -04:00
Shiraz Saleem 6c7d46fdb8 i40iw: Change mem_resources pointer to a u8
iwdev->mem_resources is incorrectly defined as an unsigned
long instead of u8. As a result, the offset into the dynamic
allocated structures in i40iw_initialize_hw_resources() is
incorrectly calculated and would lead to writing of memory
regions outside of the allocated buffer.

Fixes: 8e06af711b ("i40iw: add main, hdr, status")

Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-08-23 12:40:19 -04:00
Shiraz Saleem 7748e4990d i40iw: Enable level-1 PBL for fast memory registration
Set the chunk_size to enable level-1 PBL support when the fast memory
page count is more than one.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-06-23 10:35:34 -04:00
Faisal Latif 0477e18145 i40iw: Return correct max_fast_reg_page_list_len
Return correct value for max_fast_reg_page_list_len from
i40iw_query_device().

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-06-23 10:35:34 -04:00
Ismail, Mustafa 20c61f7e88 RDMA/i40iw: Fix endian issues and warnings
Fix endian warnings and errors due to u32 stored to u16.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-04-28 16:32:54 -04:00
Ismail, Mustafa f606d89330 RDMA/i40iw: Remove unused code and fix warning
Remove unused code and fix warning.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-04-28 16:32:54 -04:00
Ismail, Mustafa 996abf0a52 RDMA/i40iw: Add qp table lock around AE processing
QP may be freed during Async Event processing.
Add a lock around QP table to prevent it.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-04-28 16:32:53 -04:00
Tatyana Nikolova 34abf9ed73 i40iw: Replace the obsolete crypto hash interface with shash
This patch replaces the obsolete crypto hash interface with shash
and resolves a build failure after merge of the rdma tree
which is caused by the removal of crypto hash interface

Removing CRYPTO_ALG_ASYNC from crypto_alloc_shash(),
because it is by definition sync only

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-03-21 16:02:24 -04:00
Faisal Latif 8e06af711b i40iw: add main, hdr, status
i40iw_main.c contains routines for i40e <=> i40iw interface and setup.
i40iw.h is header file for main device data structures.
i40iw_status.h is for return status codes.

Changes from v2:
	more cast improvement
	fixed timing issue during unload
	added paramater change call from i40e

Changes from v1:
	improved casting issues
	do not print error using pr_err
	change from bits to bool in i40iw_cqp_request{}

Acked-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-02-29 17:10:52 -05:00