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iwlwifi: pcie: add fake RF-kill to debugfs 

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 <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2017-04-25 09:58:25 +02:00 committed by Luca Coelho
parent 3a6e168baa
commit fa4de7f7c3
3 changed files with 50 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/wireless/intel/iwlwifi/pcie/internal.h
View File

@ -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);

2
drivers/net/wireless/intel/iwlwifi/pcie/rx.c
View File

@ -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;

40
drivers/net/wireless/intel/iwlwifi/pcie/trans.c
View File

@ -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: