Commit 5cc8cc44 authored by Bryan O'Donoghue's avatar Bryan O'Donoghue Committed by Kalle Valo
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wifi: wcn36xx: Add debugfs entry to read firmware feature strings 



Add in the ability to easily find the firmware feature bits reported in the
get feature exchange without having to compile-in debug prints.

root@linaro-alip:~# cat /sys/kernel/debug/ieee80211/phy0/wcn36xx/firmware_feat_caps
MCC
P2P
DOT11AC
SLM_SESSIONIZATION
DOT11AC_OPMODE
SAP32STA
TDLS
P2P_GO_NOA_DECOUPLE_INIT_SCAN
WLANACTIVE_OFFLOAD
BEACON_OFFLOAD
SCAN_OFFLOAD
BCN_MISS_OFFLOAD
STA_POWERSAVE
STA_ADVANCED_PWRSAVE
BCN_FILTER
RTT
RATECTRL
WOW
WLAN_ROAM_SCAN_OFFLOAD
SPECULATIVE_PS_POLL
IBSS_HEARTBEAT_OFFLOAD
WLAN_SCAN_OFFLOAD
WLAN_PERIODIC_TX_PTRN
ADVANCE_TDLS
BATCH_SCAN
FW_IN_TX_PATH
EXTENDED_NSOFFLOAD_SLOT
CH_SWITCH_V1
HT40_OBSS_SCAN
UPDATE_CHANNEL_LIST
WLAN_MCADDR_FLT
WLAN_CH144
TDLS_SCAN_COEXISTENCE
LINK_LAYER_STATS_MEAS
MU_MIMO
EXTENDED_SCAN
DYNAMIC_WMM_PS
MAC_SPOOFED_SCAN
FW_STATS
WPS_PRBRSP_TMPL
BCN_IE_FLT_DELTA

Signed-off-by: default avatarBryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: default avatarKalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220727161655.2286867-5-bryan.odonoghue@linaro.org
parent 75072b29

drivers/net/wireless/ath/wcn36xx/debug.c

+39 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include "wcn36xx.h"

#include "debug.h"

#include "pmc.h"

#include "firmware.h"



#ifdef CONFIG_WCN36XX_DEBUGFS
@@ -136,6 +137,42 @@ static const struct file_operations fops_wcn36xx_dump = { 
	.write =       write_file_dump,

};



static ssize_t read_file_firmware_feature_caps(struct file *file,

					       char __user *user_buf,

					       size_t count, loff_t *ppos)

{

	struct wcn36xx *wcn = file->private_data;

	size_t len = 0, buf_len = 2048;

	char *buf;

	int i;

	int ret;



	buf = kzalloc(buf_len, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	mutex_lock(&wcn->hal_mutex);

	for (i = 0; i < MAX_FEATURE_SUPPORTED; i++) {

		if (wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, i)) {

			len += scnprintf(buf + len, buf_len - len, "%s\n",

					 wcn36xx_firmware_get_cap_name(i));

		}

		if (len >= buf_len)

			break;

	}

	mutex_unlock(&wcn->hal_mutex);



	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);

	kfree(buf);



	return ret;

}



static const struct file_operations fops_wcn36xx_firmware_feat_caps = {

	.open = simple_open,

	.read = read_file_firmware_feature_caps,

};



#define ADD_FILE(name, mode, fop, priv_data)		\

	do {							\

		struct dentry *d;				\
@@ -163,6 +200,8 @@ void wcn36xx_debugfs_init(struct wcn36xx *wcn) 


	ADD_FILE(bmps_switcher, 0600, &fops_wcn36xx_bmps, wcn);

	ADD_FILE(dump, 0200, &fops_wcn36xx_dump, wcn);

	ADD_FILE(firmware_feat_caps, 0200,

		 &fops_wcn36xx_firmware_feat_caps, wcn);

}



void wcn36xx_debugfs_exit(struct wcn36xx *wcn)

drivers/net/wireless/ath/wcn36xx/debug.h

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ struct wcn36xx_dfs_entry { 
	struct dentry *rootdir;

	struct wcn36xx_dfs_file file_bmps_switcher;

	struct wcn36xx_dfs_file file_dump;

	struct wcn36xx_dfs_file file_firmware_feat_caps;

};



void wcn36xx_debugfs_init(struct wcn36xx *wcn);