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| author | Ramya Gnanasekar <quic_rgnanase@quicinc.com> | 2023-01-23 12:51:41 +0300 |
|---|---|---|
| committer | Kalle Valo <quic_kvalo@quicinc.com> | 2023-02-22 12:50:29 +0300 |
| commit | 80e396586d0a94c42015dd9472176d89a3b0e4ca (patch) | |
| tree | 4c1a478ec5a0fa0d485bb5e6e57b1e6397f609ad /drivers/net/wireless/ath/ath12k/pci.h | |
| parent | 95a389e2ff3212d866cc51c77d682d2934074eb8 (diff) | |
| download | linux-80e396586d0a94c42015dd9472176d89a3b0e4ca.tar.xz | |
wifi: ath12k: PCI ops for wakeup/release MHI
Wakeup/release MHI is not needed before pci_read/write for QCN9274.
Since wakeup & release MHI is enabled for all QCN9274 and
WCN7850, below MHI assert is seen in QCN9274
[ 784.906613] BUG: sleeping function called from invalid context at drivers/bus/mhi/host/pm.c:989
[ 784.906633] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/3
[ 784.906637] preempt_count: 503, expected: 0
[ 784.906641] RCU nest depth: 0, expected: 0
[ 784.906644] 2 locks held by swapper/3/0:
[ 784.906646] #0: ffff8ed348e429e0 (&ab->ce.ce_lock){+.-.}-{2:2}, at: ath12k_ce_recv_process_cb+0xb3/0x2f0 [ath12k]
[ 784.906664] #1: ffff8ed348e491f0 (&srng->lock_key#3){+.-.}-{2:2}, at: ath12k_ce_recv_process_cb+0xfb/0x2f0 [ath12k]
[ 784.906678] Preemption disabled at:
[ 784.906680] [<0000000000000000>] 0x0
[ 784.906686] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W O 6.1.0-rc2+ #3
[ 784.906688] Hardware name: Intel(R) Client Systems NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0056.2019.0506.1527 05/06/2019
[ 784.906690] Call Trace:
[ 784.906691] <IRQ>
[ 784.906693] dump_stack_lvl+0x56/0x7b
[ 784.906698] __might_resched+0x21c/0x270
[ 784.906704] __mhi_device_get_sync+0x7d/0x1c0 [mhi]
[ 784.906714] mhi_device_get_sync+0xd/0x20 [mhi]
[ 784.906719] ath12k_pci_write32+0x75/0x170 [ath12k]
[ 784.906729] ath12k_hal_srng_access_end+0x55/0xc0 [ath12k]
[ 784.906737] ath12k_ce_recv_process_cb+0x1f3/0x2f0 [ath12k]
[ 784.906776] ? ath12k_pci_ce_tasklet+0x11/0x30 [ath12k]
[ 784.906788] ath12k_pci_ce_tasklet+0x11/0x30 [ath12k]
[ 784.906813] tasklet_action_common.isra.18+0xb7/0xe0
[ 784.906820] __do_softirq+0xd0/0x4c9
[ 784.906826] irq_exit_rcu+0x88/0xe0
[ 784.906828] common_interrupt+0xa5/0xc0
[ 784.906831] </IRQ>
[ 784.906832] <TASK>
Adding function callbacks for MHI wakeup and release operations.
QCN9274 does not need wakeup/release, function callbacks are initialized
to NULL. In case of WCN7850, shadow registers are used to access rings.
Since, shadow register's offset is less than ACCESS_ALWAYS_OFF,
mhi_device_get_sync() or mhi_device_put() to wakeup
and release mhi will not be called during service ring accesses.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0-03171-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Ramya Gnanasekar <quic_rgnanase@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230123095141.5310-1-quic_rgnanase@quicinc.com
Diffstat (limited to 'drivers/net/wireless/ath/ath12k/pci.h')
| -rw-r--r-- | drivers/net/wireless/ath/ath12k/pci.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath12k/pci.h b/drivers/net/wireless/ath/ath12k/pci.h index 0d9e40ab31f2..0f24fd9395cd 100644 --- a/drivers/net/wireless/ath/ath12k/pci.h +++ b/drivers/net/wireless/ath/ath12k/pci.h @@ -86,6 +86,11 @@ enum ath12k_pci_flags { ATH12K_PCI_ASPM_RESTORE, }; +struct ath12k_pci_ops { + int (*wakeup)(struct ath12k_base *ab); + void (*release)(struct ath12k_base *ab); +}; + struct ath12k_pci { struct pci_dev *pdev; struct ath12k_base *ab; @@ -103,6 +108,7 @@ struct ath12k_pci { /* enum ath12k_pci_flags */ unsigned long flags; u16 link_ctl; + const struct ath12k_pci_ops *pci_ops; }; static inline struct ath12k_pci *ath12k_pci_priv(struct ath12k_base *ab) |