wifi: ath11k: Fix invalid ring usage in full monitor mode

[ Upstream commit befd716e ]

On full monitor HW the monitor destination rxdma ring does not have the
same descriptor format as in the "classical" mode. The full monitor
destination entries are of hal_sw_monitor_ring type and fetched using
ath11k_dp_full_mon_process_rx while the classical ones are of type
hal_reo_entrance_ring and fetched with ath11k_dp_rx_mon_dest_process.

Although both hal_sw_monitor_ring and hal_reo_entrance_ring are of same
size, the offset to useful info (such as sw_cookie, paddr, etc) are
different. Thus if ath11k_dp_rx_mon_dest_process gets called on full
monitor destination ring, invalid skb buffer id will be fetched from DMA
ring causing issues such as the following rcu_sched stall:

 rcu: INFO: rcu_sched self-detected stall on CPU
 rcu:     0-....: (1 GPs behind) idle=c67/0/0x7 softirq=45768/45769 fqs=1012
  (t=2100 jiffies g=14817 q=8703)
 Task dump for CPU 0:
 task:swapper/0       state:R  running task     stack: 0 pid:    0 ppid:     0 flags:0x0000000a
 Call trace:
  dump_backtrace+0x0/0x160
  show_stack+0x14/0x20
  sched_show_task+0x158/0x184
  dump_cpu_task+0x40/0x4c
  rcu_dump_cpu_stacks+0xec/0x12c
  rcu_sched_clock_irq+0x6c8/0x8a0
  update_process_times+0x88/0xd0
  tick_sched_timer+0x74/0x1e0
  __hrtimer_run_queues+0x150/0x204
  hrtimer_interrupt+0xe4/0x240
  arch_timer_handler_phys+0x30/0x40
  handle_percpu_devid_irq+0x80/0x130
  handle_domain_irq+0x5c/0x90
  gic_handle_irq+0x8c/0xb4
  do_interrupt_handler+0x30/0x54
  el1_interrupt+0x2c/0x4c
  el1h_64_irq_handler+0x14/0x1c
  el1h_64_irq+0x74/0x78
  do_raw_spin_lock+0x60/0x100
  _raw_spin_lock_bh+0x1c/0x2c
  ath11k_dp_rx_mon_mpdu_pop.constprop.0+0x174/0x650
  ath11k_dp_rx_process_mon_status+0x8b4/0xa80
  ath11k_dp_rx_process_mon_rings+0x244/0x510
  ath11k_dp_service_srng+0x190/0x300
  ath11k_pcic_ext_grp_napi_poll+0x30/0xc0
  __napi_poll+0x34/0x174
  net_rx_action+0xf8/0x2a0
  _stext+0x12c/0x2ac
  irq_exit+0x94/0xc0
  handle_domain_irq+0x60/0x90
  gic_handle_irq+0x8c/0xb4
  call_on_irq_stack+0x28/0x44
  do_interrupt_handler+0x4c/0x54
  el1_interrupt+0x2c/0x4c
  el1h_64_irq_handler+0x14/0x1c
  el1h_64_irq+0x74/0x78
  arch_cpu_idle+0x14/0x20
  do_idle+0xf0/0x130
  cpu_startup_entry+0x24/0x50
  rest_init+0xf8/0x104
  arch_call_rest_init+0xc/0x14
  start_kernel+0x56c/0x58c
  __primary_switched+0xa0/0xa8

Thus ath11k_dp_rx_mon_dest_process(), which use classical destination
entry format, should no be called on full monitor capable HW.

Fixes: 67a9d399 ("ath11k: enable RX PPDU stats in monitor co-exist mode")
Signed-off-by: Remi Pommarel <repk@triplefau.lt>
Reviewed-by: Praneesh P <quic_ppranees@quicinc.com>
Link: https://patch.msgid.link/20240924194119.15942-1-repk@triplefau.lt


Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>