From 8be12629b428084be2610041d61b132074d334f6 Mon Sep 17 00:00:00 2001 From: Aditya Kumar Singh Date: Tue, 9 Jul 2024 11:28:17 +0530 Subject: [PATCH] wifi: ath12k: restore ASPM for supported hardwares only During PCI based hardware device start up, ASPM is disabled for all. And once firmware is ready, it is restored back. However, not all hardwares (for example QCN9274) supports ASPM. Hence there is a need to conditionally restore ASPM back. Or else, for such hardwares, issue can be seen during sending and receiving packets. Introduce a new hardware param supports_aspm which identifies whether a given hardware supports ASPM or not and then accordingly restore it. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Aditya Kumar Singh Acked-by: Jeff Johnson Signed-off-by: Kalle Valo Link: https://patch.msgid.link/20240709055817.3371406-1-quic_adisi@quicinc.com --- drivers/net/wireless/ath/ath12k/hw.c | 6 ++++++ drivers/net/wireless/ath/ath12k/hw.h | 1 + drivers/net/wireless/ath/ath12k/pci.c | 3 ++- 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/hw.c b/drivers/net/wireless/ath/ath12k/hw.c index 2e11ea7635740c..76c0e07a88de79 100644 --- a/drivers/net/wireless/ath/ath12k/hw.c +++ b/drivers/net/wireless/ath/ath12k/hw.c @@ -924,6 +924,8 @@ static const struct ath12k_hw_params ath12k_hw_params[] = { .acpi_guid = NULL, .supports_dynamic_smps_6ghz = true, + + .supports_aspm = false, }, { .name = "wcn7850 hw2.0", @@ -1000,6 +1002,8 @@ static const struct ath12k_hw_params ath12k_hw_params[] = { .acpi_guid = &wcn7850_uuid, .supports_dynamic_smps_6ghz = false, + + .supports_aspm = true, }, { .name = "qcn9274 hw2.0", @@ -1072,6 +1076,8 @@ static const struct ath12k_hw_params ath12k_hw_params[] = { .acpi_guid = NULL, .supports_dynamic_smps_6ghz = true, + + .supports_aspm = false, }, }; diff --git a/drivers/net/wireless/ath/ath12k/hw.h b/drivers/net/wireless/ath/ath12k/hw.h index e792eb6b249b41..4cfbb240bbf430 100644 --- a/drivers/net/wireless/ath/ath12k/hw.h +++ b/drivers/net/wireless/ath/ath12k/hw.h @@ -187,6 +187,7 @@ struct ath12k_hw_params { bool tcl_ring_retry:1; bool reoq_lut_support:1; bool supports_shadow_regs:1; + bool supports_aspm:1; u32 num_tcl_banks; u32 max_tx_ring; diff --git a/drivers/net/wireless/ath/ath12k/pci.c b/drivers/net/wireless/ath/ath12k/pci.c index 876c029f58f62c..ff2199f7754c0a 100644 --- a/drivers/net/wireless/ath/ath12k/pci.c +++ b/drivers/net/wireless/ath/ath12k/pci.c @@ -953,7 +953,8 @@ static void ath12k_pci_update_qrtr_node_id(struct ath12k_base *ab) static void ath12k_pci_aspm_restore(struct ath12k_pci *ab_pci) { - if (test_and_clear_bit(ATH12K_PCI_ASPM_RESTORE, &ab_pci->flags)) + if (ab_pci->ab->hw_params->supports_aspm && + test_and_clear_bit(ATH12K_PCI_ASPM_RESTORE, &ab_pci->flags)) pcie_capability_clear_and_set_word(ab_pci->pdev, PCI_EXP_LNKCTL, PCI_EXP_LNKCTL_ASPMC, ab_pci->link_ctl &