diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath11k/pci.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/pci.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index d8655badd96d..7114eca8810d 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: BSD-3-Clause-Clear /* * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved. - * Copyright (c) 2021-2025 Qualcomm Innovation Center, Inc. All rights reserved. + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. */ #include <linux/module.h> @@ -177,6 +177,19 @@ static inline void ath11k_pci_select_static_window(struct ath11k_pci *ab_pci) ab_pci->ab->mem + ATH11K_PCI_WINDOW_REG_ADDRESS); } +static void ath11k_pci_restore_window(struct ath11k_base *ab) +{ + struct ath11k_pci *ab_pci = ath11k_pci_priv(ab); + + spin_lock_bh(&ab_pci->window_lock); + + iowrite32(ATH11K_PCI_WINDOW_ENABLE_BIT | ab_pci->register_window, + ab->mem + ATH11K_PCI_WINDOW_REG_ADDRESS); + ioread32(ab->mem + ATH11K_PCI_WINDOW_REG_ADDRESS); + + spin_unlock_bh(&ab_pci->window_lock); +} + static void ath11k_pci_soc_global_reset(struct ath11k_base *ab) { u32 val, delay; @@ -201,6 +214,11 @@ static void ath11k_pci_soc_global_reset(struct ath11k_base *ab) val = ath11k_pcic_read32(ab, PCIE_SOC_GLOBAL_RESET); if (val == 0xffffffff) ath11k_warn(ab, "link down error during global reset\n"); + + /* Restore window register as its content is cleared during + * hardware global reset, such that it aligns with host cache. + */ + ath11k_pci_restore_window(ab); } static void ath11k_pci_clear_dbg_registers(struct ath11k_base *ab) |