Skip to content

Commit

Permalink
mt76: mt7921: add debugfs support
Browse files Browse the repository at this point in the history
Add debugfs support to dump driver statistics and hardware details.

Co-developed-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Lorenzo Bianconi <[email protected]>
Co-developed-by: Soul Huang <[email protected]>
Signed-off-by: Soul Huang <[email protected]>
Signed-off-by: Sean Wang <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
  • Loading branch information
moore-bros authored and nbd168 committed Jan 29, 2021
1 parent 5c14a5f commit 474a9f2
Show file tree
Hide file tree
Showing 2 changed files with 179 additions and 1 deletion.
178 changes: 178 additions & 0 deletions drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,178 @@
// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc. */

#include "mt7921.h"
#include "eeprom.h"

static int
mt7921_fw_debug_set(void *data, u64 val)
{
struct mt7921_dev *dev = data;

dev->fw_debug = (u8)val;

mt7921_mcu_fw_log_2_host(dev, dev->fw_debug);

return 0;
}

static int
mt7921_fw_debug_get(void *data, u64 *val)
{
struct mt7921_dev *dev = data;

*val = dev->fw_debug;

return 0;
}

DEFINE_DEBUGFS_ATTRIBUTE(fops_fw_debug, mt7921_fw_debug_get,
mt7921_fw_debug_set, "%lld\n");

static void
mt7921_ampdu_stat_read_phy(struct mt7921_phy *phy,
struct seq_file *file)
{
struct mt7921_dev *dev = file->private;
int bound[15], range[4], i;

if (!phy)
return;

/* Tx ampdu stat */
for (i = 0; i < ARRAY_SIZE(range); i++)
range[i] = mt76_rr(dev, MT_MIB_ARNG(0, i));

for (i = 0; i < ARRAY_SIZE(bound); i++)
bound[i] = MT_MIB_ARNCR_RANGE(range[i / 4], i) + 1;

seq_printf(file, "\nPhy0\n");

seq_printf(file, "Length: %8d | ", bound[0]);
for (i = 0; i < ARRAY_SIZE(bound) - 1; i++)
seq_printf(file, "%3d -%3d | ",
bound[i] + 1, bound[i + 1]);

seq_puts(file, "\nCount: ");
for (i = 0; i < ARRAY_SIZE(bound); i++)
seq_printf(file, "%8d | ", dev->mt76.aggr_stats[i]);
seq_puts(file, "\n");

seq_printf(file, "BA miss count: %d\n", phy->mib.ba_miss_cnt);
}

static int
mt7921_tx_stats_read(struct seq_file *file, void *data)
{
struct mt7921_dev *dev = file->private;
int stat[8], i, n;

mt7921_ampdu_stat_read_phy(&dev->phy, file);

/* Tx amsdu info */
seq_puts(file, "Tx MSDU stat:\n");
for (i = 0, n = 0; i < ARRAY_SIZE(stat); i++) {
stat[i] = mt76_rr(dev, MT_PLE_AMSDU_PACK_MSDU_CNT(i));
n += stat[i];
}

for (i = 0; i < ARRAY_SIZE(stat); i++) {
seq_printf(file, "AMSDU pack count of %d MSDU in TXD: 0x%x ",
i + 1, stat[i]);
if (n != 0)
seq_printf(file, "(%d%%)\n", stat[i] * 100 / n);
else
seq_puts(file, "\n");
}

return 0;
}

static int
mt7921_tx_stats_open(struct inode *inode, struct file *f)
{
return single_open(f, mt7921_tx_stats_read, inode->i_private);
}

static const struct file_operations fops_tx_stats = {
.open = mt7921_tx_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};

static int
mt7921_queues_acq(struct seq_file *s, void *data)
{
struct mt7921_dev *dev = dev_get_drvdata(s->private);
int i;

for (i = 0; i < 16; i++) {
int j, acs = i / 4, index = i % 4;
u32 ctrl, val, qlen = 0;

val = mt76_rr(dev, MT_PLE_AC_QEMPTY(acs, index));
ctrl = BIT(31) | BIT(15) | (acs << 8);

for (j = 0; j < 32; j++) {
if (val & BIT(j))
continue;

mt76_wr(dev, MT_PLE_FL_Q0_CTRL,
ctrl | (j + (index << 5)));
qlen += mt76_get_field(dev, MT_PLE_FL_Q3_CTRL,
GENMASK(11, 0));
}
seq_printf(s, "AC%d%d: queued=%d\n", acs, index, qlen);
}

return 0;
}

static int
mt7921_queues_read(struct seq_file *s, void *data)
{
struct mt7921_dev *dev = dev_get_drvdata(s->private);
struct {
struct mt76_queue *q;
char *queue;
} queue_map[] = {
{ dev->mphy.q_tx[MT_TXQ_BE], "WFDMA0" },
{ dev->mt76.q_mcu[MT_MCUQ_WM], "MCUWM" },
{ dev->mt76.q_mcu[MT_MCUQ_FWDL], "MCUFWQ" },
};
int i;

for (i = 0; i < ARRAY_SIZE(queue_map); i++) {
struct mt76_queue *q = queue_map[i].q;

if (!q)
continue;

seq_printf(s,
"%s: queued=%d head=%d tail=%d\n",
queue_map[i].queue, q->queued, q->head,
q->tail);
}

return 0;
}

int mt7921_init_debugfs(struct mt7921_dev *dev)
{
struct dentry *dir;

dir = mt76_register_debugfs(&dev->mt76);
if (!dir)
return -ENOMEM;

debugfs_create_devm_seqfile(dev->mt76.dev, "queues", dir,
mt7921_queues_read);
debugfs_create_devm_seqfile(dev->mt76.dev, "acq", dir,
mt7921_queues_acq);
debugfs_create_file("tx_stats", 0400, dir, dev, &fops_tx_stats);
debugfs_create_file("fw_debug", 0600, dir, dev, &fops_fw_debug);

return 0;
}
2 changes: 1 addition & 1 deletion drivers/net/wireless/mediatek/mt76/mt7921/init.c
Original file line number Diff line number Diff line change
Expand Up @@ -232,7 +232,7 @@ int mt7921_register_device(struct mt7921_dev *dev)

ieee80211_queue_work(mt76_hw(dev), &dev->init_work);

return 0;
return mt7921_init_debugfs(dev);
}

void mt7921_unregister_device(struct mt7921_dev *dev)
Expand Down

0 comments on commit 474a9f2

Please sign in to comment.