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Subject[PATCH 5.15 038/230] ath11k: add hw_param for wakeup_mhi
Date
From: Seevalamuthu Mariappan <quic_seevalam@quicinc.com>

[ Upstream commit 081e2d6476e30399433b509684d5da4d1844e430 ]

Wakeup mhi is needed before pci_read/write only for QCA6390 and WCN6855. Since
wakeup & release mhi is enabled for all hardwares, below mhi assert is seen in
QCN9074 when doing 'rmmod ath11k_pci':

Kernel panic - not syncing: dev_wake != 0
CPU: 2 PID: 13535 Comm: procd Not tainted 4.4.60 #1
Hardware name: Generic DT based system
[<80316dac>] (unwind_backtrace) from [<80313700>] (show_stack+0x10/0x14)
[<80313700>] (show_stack) from [<805135dc>] (dump_stack+0x7c/0x9c)
[<805135dc>] (dump_stack) from [<8032136c>] (panic+0x84/0x1f8)
[<8032136c>] (panic) from [<80549b24>] (mhi_pm_disable_transition+0x3b8/0x5b8)
[<80549b24>] (mhi_pm_disable_transition) from [<80549ddc>] (mhi_power_down+0xb8/0x100)
[<80549ddc>] (mhi_power_down) from [<7f5242b0>] (ath11k_mhi_op_status_cb+0x284/0x3ac [ath11k_pci])
[E][__mhi_device_get_sync] Did not enter M0 state, cur_state:RESET pm_state:SHUTDOWN Process
[E][__mhi_device_get_sync] Did not enter M0 state, cur_state:RESET pm_state:SHUTDOWN Process
[E][__mhi_device_get_sync] Did not enter M0 state, cur_state:RESET pm_state:SHUTDOWN Process
[<7f5242b0>] (ath11k_mhi_op_status_cb [ath11k_pci]) from [<7f524878>] (ath11k_mhi_stop+0x10/0x20 [ath11k_pci])
[<7f524878>] (ath11k_mhi_stop [ath11k_pci]) from [<7f525b94>] (ath11k_pci_power_down+0x54/0x90 [ath11k_pci])
[<7f525b94>] (ath11k_pci_power_down [ath11k_pci]) from [<8056b2a8>] (pci_device_shutdown+0x30/0x44)
[<8056b2a8>] (pci_device_shutdown) from [<805cfa0c>] (device_shutdown+0x124/0x174)
[<805cfa0c>] (device_shutdown) from [<8033aaa4>] (kernel_restart+0xc/0x50)
[<8033aaa4>] (kernel_restart) from [<8033ada8>] (SyS_reboot+0x178/0x1ec)
[<8033ada8>] (SyS_reboot) from [<80301b80>] (ret_fast_syscall+0x0/0x34)

Hence, disable wakeup/release mhi using hw_param for other hardwares.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.5.0.1-01060-QCAHKSWPL_SILICONZ-1

Fixes: a05bd8513335 ("ath11k: read and write registers below unwindowed address")
Signed-off-by: Seevalamuthu Mariappan <quic_seevalam@quicinc.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1636702019-26142-1-git-send-email-quic_seevalam@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath11k/core.c | 5 +++++
drivers/net/wireless/ath/ath11k/hw.h | 1 +
drivers/net/wireless/ath/ath11k/pci.c | 12 ++++++++----
3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index 7dcf6b13f794..48b4151e13a3 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -71,6 +71,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
.supports_suspend = false,
.hal_desc_sz = sizeof(struct hal_rx_desc_ipq8074),
.fix_l1ss = true,
+ .wakeup_mhi = false,
},
{
.hw_rev = ATH11K_HW_IPQ6018_HW10,
@@ -112,6 +113,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
.supports_suspend = false,
.hal_desc_sz = sizeof(struct hal_rx_desc_ipq8074),
.fix_l1ss = true,
+ .wakeup_mhi = false,
},
{
.name = "qca6390 hw2.0",
@@ -152,6 +154,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
.supports_suspend = true,
.hal_desc_sz = sizeof(struct hal_rx_desc_ipq8074),
.fix_l1ss = true,
+ .wakeup_mhi = true,
},
{
.name = "qcn9074 hw1.0",
@@ -190,6 +193,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
.supports_suspend = false,
.hal_desc_sz = sizeof(struct hal_rx_desc_qcn9074),
.fix_l1ss = true,
+ .wakeup_mhi = false,
},
{
.name = "wcn6855 hw2.0",
@@ -230,6 +234,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
.supports_suspend = true,
.hal_desc_sz = sizeof(struct hal_rx_desc_wcn6855),
.fix_l1ss = false,
+ .wakeup_mhi = true,
},
};

diff --git a/drivers/net/wireless/ath/ath11k/hw.h b/drivers/net/wireless/ath/ath11k/hw.h
index 62f5978b3005..4fe051625edf 100644
--- a/drivers/net/wireless/ath/ath11k/hw.h
+++ b/drivers/net/wireless/ath/ath11k/hw.h
@@ -163,6 +163,7 @@ struct ath11k_hw_params {
bool supports_suspend;
u32 hal_desc_sz;
bool fix_l1ss;
+ bool wakeup_mhi;
};

struct ath11k_hw_ops {
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 353a2d669fcd..7d0be9388f89 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -182,7 +182,8 @@ void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
/* for offset beyond BAR + 4K - 32, may
* need to wakeup MHI to access.
*/
- if (test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
+ if (ab->hw_params.wakeup_mhi &&
+ test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
offset >= ACCESS_ALWAYS_OFF)
mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);

@@ -206,7 +207,8 @@ void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
}
}

- if (test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
+ if (ab->hw_params.wakeup_mhi &&
+ test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
offset >= ACCESS_ALWAYS_OFF)
mhi_device_put(ab_pci->mhi_ctrl->mhi_dev);
}
@@ -219,7 +221,8 @@ u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
/* for offset beyond BAR + 4K - 32, may
* need to wakeup MHI to access.
*/
- if (test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
+ if (ab->hw_params.wakeup_mhi &&
+ test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
offset >= ACCESS_ALWAYS_OFF)
mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);

@@ -243,7 +246,8 @@ u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
}
}

- if (test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
+ if (ab->hw_params.wakeup_mhi &&
+ test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
offset >= ACCESS_ALWAYS_OFF)
mhi_device_put(ab_pci->mhi_ctrl->mhi_dev);

--
2.35.1


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