From: Johannes Berg <[email protected]> In order to debug "hardware" RF-kill flows, add a low-level hook to allow changing the "hardware" RF-kill from debugfs.
Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: Luca Coelho <[email protected]> --- drivers/net/wireless/intel/iwlwifi/pcie/internal.h | 10 +++++- drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 2 +- drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 40 ++++++++++++++++++++++ 3 files changed, 50 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h index 4b7be7ba9780..17bd95614483 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h @@ -404,6 +404,7 @@ struct iwl_trans_pcie { int ict_index; bool use_ict; bool is_down; + bool debug_rfkill; struct isr_statistics isr_stats; spinlock_t irq_lock; @@ -675,6 +676,8 @@ static inline void iwl_enable_rfkill_int(struct iwl_trans *trans) } } +void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans); + static inline void iwl_wake_queue(struct iwl_trans *trans, struct iwl_txq *txq) { @@ -713,7 +716,12 @@ static inline u8 get_cmd_index(struct iwl_txq *q, u32 index) static inline bool iwl_is_rfkill_set(struct iwl_trans *trans) { - lockdep_assert_held(&IWL_TRANS_GET_PCIE_TRANS(trans)->mutex); + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + + lockdep_assert_held(&trans_pcie->mutex); + + if (trans_pcie->debug_rfkill) + return true; return !(iwl_read32(trans, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW); diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index c27d6f711abf..b6b04e72521e 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -1509,7 +1509,7 @@ static u32 iwl_pcie_int_cause_ict(struct iwl_trans *trans) return inta; } -static void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans) +void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct isr_statistics *isr_stats = &trans_pcie->isr_stats; diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index a3c5d3b195ad..6c4f8e377fb9 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -2461,11 +2461,50 @@ static ssize_t iwl_dbgfs_fh_reg_read(struct file *file, return ret; } +static ssize_t iwl_dbgfs_rfkill_read(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct iwl_trans *trans = file->private_data; + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + char buf[100]; + int pos; + + pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n", + trans_pcie->debug_rfkill, + !(iwl_read32(trans, CSR_GP_CNTRL) & + CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)); + + return simple_read_from_buffer(user_buf, count, ppos, buf, pos); +} + +static ssize_t iwl_dbgfs_rfkill_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct iwl_trans *trans = file->private_data; + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + bool old = trans_pcie->debug_rfkill; + int ret; + + ret = kstrtobool_from_user(user_buf, count, &trans_pcie->debug_rfkill); + if (ret) + return ret; + if (old == trans_pcie->debug_rfkill) + return count; + IWL_WARN(trans, "changing debug rfkill %d->%d\n", + old, trans_pcie->debug_rfkill); + iwl_pcie_handle_rfkill_irq(trans); + + return count; +} + DEBUGFS_READ_WRITE_FILE_OPS(interrupt); DEBUGFS_READ_FILE_OPS(fh_reg); DEBUGFS_READ_FILE_OPS(rx_queue); DEBUGFS_READ_FILE_OPS(tx_queue); DEBUGFS_WRITE_FILE_OPS(csr); +DEBUGFS_READ_WRITE_FILE_OPS(rfkill); /* Create the debugfs files and directories */ int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans) @@ -2477,6 +2516,7 @@ int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans) DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR); DEBUGFS_ADD_FILE(csr, dir, S_IWUSR); DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR); + DEBUGFS_ADD_FILE(rfkill, dir, S_IWUSR | S_IRUSR); return 0; err: -- 2.11.0
