Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0eb83653 authored by Eliad Peller's avatar Eliad Peller Committed by Emmanuel Grumbach
Browse files

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



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: default avatarEliad Peller <eliadx.peller@intel.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
parent 37577fe2

drivers/net/wireless/iwlwifi/mvm/debugfs.c

+31 −2
Original line number Diff line number Diff line
@@ -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) {

drivers/net/wireless/iwlwifi/mvm/mvm.h

+1 −0
Original line number Diff line number Diff line
@@ -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,

};