[PW_SID:1078042] [v2] Bluetooth: btintel_pcie: Support Product level reset

[BluezTestBot]

When driver encounters a TOP exception, ACPI methods will be called
for Product level reset since Wifi and BT share the same TOP. BT driver
will first reprobe the wifi driver and then reprobe BT.

Signed-off-by: Chandrashekar Devegowda chandrashekar.devegowda@intel.com

Notes:
v2: Incorporated review comments.

Tested by:
1) Simulating TOP exception: sudo hcitool cmd 3f 4d 0A 00
   And verified that the device went through PLDR by checking the ACPI
   debug logs.
2) Toggle of sysfs attribute for BT reset for FLR i.e
   echo 1 > /sys/class/bluetooth/hci0/reset

drivers/bluetooth/btintel.c | 8 +-
drivers/bluetooth/btintel.h | 7 ++
drivers/bluetooth/btintel_pcie.c | 164 +++++++++++++++++++++++++++++--
drivers/bluetooth/btintel_pcie.h | 6 ++
4 files changed, 173 insertions(+), 12 deletions(-)

[github-actions]

CheckPatch
Desc: Run checkpatch.pl script
Duration: 0.50 seconds
Result: PENDING

[github-actions]

GitLint
Desc: Run gitlint
Duration: 0.29 seconds
Result: PENDING

[github-actions]

SubjectPrefix
Desc: Check subject contains "Bluetooth" prefix
Duration: 0.12 seconds
Result: PASS

[github-actions]

BuildKernel
Desc: Build Kernel for Bluetooth
Duration: 25.22 seconds
Result: PASS

[github-actions]

CheckAllWarning
Desc: Run linux kernel with all warning enabled
Duration: 27.20 seconds
Result: PASS

[github-actions]

CheckSparse
Desc: Run sparse tool with linux kernel
Duration: 26.02 seconds
Result: PASS

[github-actions]

BuildKernel32
Desc: Build 32bit Kernel for Bluetooth
Duration: 24.38 seconds
Result: PASS

[github-actions]

TestRunnerSetup
Desc: Setup kernel and bluez for test-runner
Duration: 516.99 seconds
Result: PASS

[github-actions]

TestRunner_l2cap-tester
Desc: Run l2cap-tester with test-runner
Duration: 33.93 seconds
Result: PASS

[github-actions]

TestRunner_iso-tester
Desc: Run iso-tester with test-runner
Duration: 42.63 seconds
Result: PASS

[github-actions]

TestRunner_bnep-tester
Desc: Run bnep-tester with test-runner
Duration: 6.31 seconds
Result: PASS

[github-actions]

TestRunner_mgmt-tester
Desc: Run mgmt-tester with test-runner
Duration: 110.63 seconds
Result: FAIL
Output:

Total: 494, Passed: 489 (99.0%), Failed: 1, Not Run: 4

Failed Test Cases
Read Exp Feature - Success                           Failed       0.104 seconds

[github-actions]

TestRunner_rfcomm-tester
Desc: Run rfcomm-tester with test-runner
Duration: 9.39 seconds
Result: PASS

[github-actions]

TestRunner_sco-tester
Desc: Run sco-tester with test-runner
Duration: 14.24 seconds
Result: FAIL
Output:

WARNING: possible circular locking dependency detected
7.0.0-rc2-g52c2e89e5f6c #1 Not tainted
------------------------------------------------------
kworker/u5:2/117 is trying to acquire lock:
ffff888001abe240 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x358/0x8d0

but task is already holding lock:
ffff8880025b6220 (&conn->lock){+.+.}-{3:3}, at: sco_connect_cfm+0x22d/0x8d0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&conn->lock){+.+.}-{3:3}:
       lock_acquire+0xf7/0x2c0
       _raw_spin_lock+0x2a/0x40
       sco_sock_connect+0x4d7/0x1280
       __sys_connect+0x1a3/0x260
       __x64_sys_connect+0x6e/0xb0
       do_syscall_64+0xa0/0x570
       entry_SYSCALL_64_after_hwframe+0x74/0x7c

-> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}:
       check_prev_add+0xe9/0xc70
       __lock_acquire+0x1457/0x1df0
       lock_acquire+0xf7/0x2c0
       lock_sock_nested+0x36/0xd0
       sco_connect_cfm+0x358/0x8d0
       hci_sync_conn_complete_evt+0x3d3/0x8e0
       hci_event_packet+0x74f/0xb10
       hci_rx_work+0x398/0xd00
       process_scheduled_works+0xb16/0x1ac0
       worker_thread+0x4ff/0xba0
       kthread+0x368/0x490
       ret_from_fork+0x498/0x7e0
       ret_from_fork_asm+0x19/0x30

other info that might help us debug this:

...
BUG: sleeping function called from invalid context at net/core/sock.c:3782
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 117, name: kworker/u5:2
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 117 Comm: kworker/u5:2 Not tainted 7.0.0-rc2-g52c2e89e5f6c #1 PREEMPT(lazy) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014
Workqueue: hci0 hci_rx_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x49/0x60
 __might_resched+0x2ea/0x500
 lock_sock_nested+0x47/0xd0
 ? sco_connect_cfm+0x358/0x8d0
 sco_connect_cfm+0x358/0x8d0
 ? hci_debugfs_create_conn+0x190/0x210
 ? __pfx_sco_connect_cfm+0x10/0x10
 hci_sync_conn_complete_evt+0x3d3/0x8e0
 hci_event_packet+0x74f/0xb10
 ? __pfx_hci_sync_conn_complete_evt+0x10/0x10
 ? __pfx_hci_event_packet+0x10/0x10
 ? mark_held_locks+0x49/0x80
 ? lockdep_hardirqs_on_prepare+0xd4/0x180
 ? _raw_spin_unlock_irqrestore+0x2c/0x50
 hci_rx_work+0x398/0xd00
 process_scheduled_works+0xb16/0x1ac0
 ? __pfx_process_scheduled_works+0x10/0x10
 ? lock_acquire+0xf7/0x2c0
 ? lock_is_held_type+0x9b/0x110
 ? __pfx_hci_rx_work+0x10/0x10
 worker_thread+0x4ff/0xba0
 ? _raw_spin_unlock_irqrestore+0x2c/0x50
 ? __pfx_worker_thread+0x10/0x10
 kthread+0x368/0x490
 ? _raw_spin_unlock_irq+0x23/0x40
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x498/0x7e0
 ? __pfx_ret_from_fork+0x10/0x10
 ? __switch_to+0x9e4/0xe50
 ? __switch_to_asm+0x32/0x60
...
Total: 30, Passed: 30 (100.0%), Failed: 0, Not Run: 0

[github-actions]

TestRunner_ioctl-tester
Desc: Run ioctl-tester with test-runner
Duration: 10.00 seconds
Result: PASS

[github-actions]

TestRunner_mesh-tester
Desc: Run mesh-tester with test-runner
Duration: 11.63 seconds
Result: FAIL
Output:

Total: 10, Passed: 8 (80.0%), Failed: 2, Not Run: 0

Failed Test Cases
Mesh - Send cancel - 1                               Timed out    1.843 seconds
Mesh - Send cancel - 2                               Timed out    1.994 seconds

[github-actions]

TestRunner_smp-tester
Desc: Run smp-tester with test-runner
Duration: 8.53 seconds
Result: PASS

[github-actions]

TestRunner_userchan-tester
Desc: Run userchan-tester with test-runner
Duration: 6.63 seconds
Result: PASS

[github-actions]

TestRunner_6lowpan-tester
Desc: Run 6lowpan-tester with test-runner
Duration: 8.58 seconds
Result: FAIL
Output:

WARNING: possible circular locking dependency detected
7.0.0-rc2-g52c2e89e5f6c #1 Not tainted
------------------------------------------------------
kworker/0:1/11 is trying to acquire lock:
ffff8880026e8940 ((wq_completion)hci0#2){+.+.}-{0:0}, at: touch_wq_lockdep_map+0x75/0x180

but task is already holding lock:
ffffffffab04da60 (rtnl_mutex){+.+.}-{4:4}, at: lowpan_unregister_netdev+0xd/0x30

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (rtnl_mutex){+.+.}-{4:4}:
       lock_acquire+0xf7/0x2c0
       __mutex_lock+0x16b/0x1fc0
       lowpan_register_netdev+0x11/0x30
       chan_ready_cb+0x836/0xd00
       l2cap_recv_frame+0x6a06/0x8920
       l2cap_recv_acldata+0x790/0xdf0
       hci_rx_work+0x500/0xd00
       process_scheduled_works+0xb16/0x1ac0
       worker_thread+0x4ff/0xba0
       kthread+0x368/0x490
       ret_from_fork+0x498/0x7e0
       ret_from_fork_asm+0x19/0x30

-> #3 (&chan->lock#3/1){+.+.}-{4:4}:
       lock_acquire+0xf7/0x2c0
       __mutex_lock+0x16b/0x1fc0
       l2cap_chan_connect+0x74e/0x1980
       lowpan_control_write+0x523/0x660
       full_proxy_write+0x10b/0x190
       vfs_write+0x1c0/0xf60
       ksys_write+0xf1/0x1d0
       do_syscall_64+0xa0/0x570
       entry_SYSCALL_64_after_hwframe+0x74/0x7c

-> #2 (&conn->lock){+.+.}-{4:4}:
...
Total: 8, Passed: 8 (100.0%), Failed: 0, Not Run: 0

[github-actions]

IncrementalBuild
Desc: Incremental build with the patches in the series
Duration: 0.32 seconds
Result: PENDING