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iwlwifi: mvm: add debugfs hook to take an mvm ref

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Support taking an mvm ref (and preventing D0i3) by
writing '1' into the d0i3_refs debugfs file.

The reference can be unref by writing 0 to the same
file.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eliad Peller 2013-11-11 18:56:35 +02:00 committed by Emmanuel Grumbach
parent 37577fe249
commit 0eb8365305
2 changed files with 32 additions and 2 deletions
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33
drivers/net/wireless/iwlwifi/mvm/debugfs.c
View File

@ -862,10 +862,39 @@ static ssize_t iwl_dbgfs_d0i3_refs_read(struct file *file,
PRINT_MVM_REF(IWL_MVM_REF_ROC);
PRINT_MVM_REF(IWL_MVM_REF_P2P_CLIENT);
PRINT_MVM_REF(IWL_MVM_REF_AP_IBSS);
PRINT_MVM_REF(IWL_MVM_REF_USER);
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
static ssize_t iwl_dbgfs_d0i3_refs_write(struct iwl_mvm *mvm, char *buf,
size_t count, loff_t *ppos)
{
unsigned long value;
int ret;
bool taken;
ret = kstrtoul(buf, 10, &value);
if (ret < 0)
return ret;
mutex_lock(&mvm->mutex);
taken = test_bit(IWL_MVM_REF_USER, mvm->ref_bitmap);
if (value == 1 && !taken)
iwl_mvm_ref(mvm, IWL_MVM_REF_USER);
else if (value == 0 && taken)
iwl_mvm_unref(mvm, IWL_MVM_REF_USER);
else
ret = -EINVAL;
mutex_unlock(&mvm->mutex);
if (ret < 0)
return ret;
return count;
}
#define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_mvm)
#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
@ -890,7 +919,7 @@ MVM_DEBUGFS_READ_FILE_OPS(fw_rx_stats);
MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart, 10);
MVM_DEBUGFS_WRITE_FILE_OPS(fw_nmi, 10);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(scan_ant_rxchain, 8);
MVM_DEBUGFS_READ_FILE_OPS(d0i3_refs);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(d0i3_refs, 8);
#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
MVM_DEBUGFS_READ_WRITE_FILE_OPS(bcast_filters, 256);
@ -922,7 +951,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
MVM_DEBUGFS_ADD_FILE(fw_nmi, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(scan_ant_rxchain, mvm->debugfs_dir,
S_IWUSR | S_IRUSR);
MVM_DEBUGFS_ADD_FILE(d0i3_refs, mvm->debugfs_dir, S_IRUSR);
MVM_DEBUGFS_ADD_FILE(d0i3_refs, mvm->debugfs_dir, S_IRUSR | S_IWUSR);
#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING) {

1
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -245,6 +245,7 @@ enum iwl_mvm_ref_type {
IWL_MVM_REF_ROC,
IWL_MVM_REF_P2P_CLIENT,
IWL_MVM_REF_AP_IBSS,
IWL_MVM_REF_USER,
IWL_MVM_REF_COUNT,
};