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6038f373a3dc1f1c26496e60b6c40b164716f07e
android_kernel_xiaomi_sm8450/drivers/net/wireless/ath/ath9k/debug.c
Arnd Bergmann 6038f373a3 llseek: automatically add .llseek fop 
All file_operations should get a .llseek operation so we can make
nonseekable_open the default for future file operations without a
.llseek pointer.

The three cases that we can automatically detect are no_llseek, seq_lseek
and default_llseek. For cases where we can we can automatically prove that
the file offset is always ignored, we use noop_llseek, which maintains
the current behavior of not returning an error from a seek.

New drivers should normally not use noop_llseek but instead use no_llseek
and call nonseekable_open at open time.  Existing drivers can be converted
to do the same when the maintainer knows for certain that no user code
relies on calling seek on the device file.

The generated code is often incorrectly indented and right now contains
comments that clarify for each added line why a specific variant was
chosen. In the version that gets submitted upstream, the comments will
be gone and I will manually fix the indentation, because there does not
seem to be a way to do that using coccinelle.

Some amount of new code is currently sitting in linux-next that should get
the same modifications, which I will do at the end of the merge window.

Many thanks to Julia Lawall for helping me learn to write a semantic
patch that does all this.

===== begin semantic patch =====
// This adds an llseek= method to all file operations,
// as a preparation for making no_llseek the default.
//
// The rules are
// - use no_llseek explicitly if we do nonseekable_open
// - use seq_lseek for sequential files
// - use default_llseek if we know we access f_pos
// - use noop_llseek if we know we don't access f_pos,
//   but we still want to allow users to call lseek
//
@ open1 exists @
identifier nested_open;
@@
nested_open(...)
{
<+...
nonseekable_open(...)
...+>
}

@ open exists@
identifier open_f;
identifier i, f;
identifier open1.nested_open;
@@
int open_f(struct inode *i, struct file *f)
{
<+...
(
nonseekable_open(...)
|
nested_open(...)
)
...+>
}

@ read disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
<+...
(
   *off = E
|
   *off += E
|
   func(..., off, ...)
|
   E = *off
)
...+>
}

@ read_no_fpos disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
... when != off
}

@ write @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
<+...
(
  *off = E
|
  *off += E
|
  func(..., off, ...)
|
  E = *off
)
...+>
}

@ write_no_fpos @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
... when != off
}

@ fops0 @
identifier fops;
@@
struct file_operations fops = {
 ...
};

@ has_llseek depends on fops0 @
identifier fops0.fops;
identifier llseek_f;
@@
struct file_operations fops = {
...
 .llseek = llseek_f,
...
};

@ has_read depends on fops0 @
identifier fops0.fops;
identifier read_f;
@@
struct file_operations fops = {
...
 .read = read_f,
...
};

@ has_write depends on fops0 @
identifier fops0.fops;
identifier write_f;
@@
struct file_operations fops = {
...
 .write = write_f,
...
};

@ has_open depends on fops0 @
identifier fops0.fops;
identifier open_f;
@@
struct file_operations fops = {
...
 .open = open_f,
...
};

// use no_llseek if we call nonseekable_open
////////////////////////////////////////////
@ nonseekable1 depends on !has_llseek && has_open @
identifier fops0.fops;
identifier nso ~= "nonseekable_open";
@@
struct file_operations fops = {
...  .open = nso, ...
+.llseek = no_llseek, /* nonseekable */
};

@ nonseekable2 depends on !has_llseek @
identifier fops0.fops;
identifier open.open_f;
@@
struct file_operations fops = {
...  .open = open_f, ...
+.llseek = no_llseek, /* open uses nonseekable */
};

// use seq_lseek for sequential files
/////////////////////////////////////
@ seq depends on !has_llseek @
identifier fops0.fops;
identifier sr ~= "seq_read";
@@
struct file_operations fops = {
...  .read = sr, ...
+.llseek = seq_lseek, /* we have seq_read */
};

// use default_llseek if there is a readdir
///////////////////////////////////////////
@ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier readdir_e;
@@
// any other fop is used that changes pos
struct file_operations fops = {
... .readdir = readdir_e, ...
+.llseek = default_llseek, /* readdir is present */
};

// use default_llseek if at least one of read/write touches f_pos
/////////////////////////////////////////////////////////////////
@ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read.read_f;
@@
// read fops use offset
struct file_operations fops = {
... .read = read_f, ...
+.llseek = default_llseek, /* read accesses f_pos */
};

@ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write.write_f;
@@
// write fops use offset
struct file_operations fops = {
... .write = write_f, ...
+	.llseek = default_llseek, /* write accesses f_pos */
};

// Use noop_llseek if neither read nor write accesses f_pos
///////////////////////////////////////////////////////////

@ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
identifier write_no_fpos.write_f;
@@
// write fops use offset
struct file_operations fops = {
...
 .write = write_f,
 .read = read_f,
...
+.llseek = noop_llseek, /* read and write both use no f_pos */
};

@ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write_no_fpos.write_f;
@@
struct file_operations fops = {
... .write = write_f, ...
+.llseek = noop_llseek, /* write uses no f_pos */
};

@ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
@@
struct file_operations fops = {
... .read = read_f, ...
+.llseek = noop_llseek, /* read uses no f_pos */
};

@ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
@@
struct file_operations fops = {
...
+.llseek = noop_llseek, /* no read or write fn */
};
===== End semantic patch =====

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Julia Lawall <julia@diku.dk>
Cc: Christoph Hellwig <hch@infradead.org>
2010-10-15 15:53:27 +02:00

1003 lines
28 KiB
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/*
* Copyright (c) 2008-2009 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/slab.h>
#include <asm/unaligned.h>
#include "ath9k.h"
#define REG_WRITE_D(_ah, _reg, _val) \
ath9k_hw_common(_ah)->ops->write((_ah), (_val), (_reg))
#define REG_READ_D(_ah, _reg) \
ath9k_hw_common(_ah)->ops->read((_ah), (_reg))
static struct dentry *ath9k_debugfs_root;
static int ath9k_debugfs_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
#ifdef CONFIG_ATH_DEBUG
static ssize_t read_file_debug(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
char buf[32];
unsigned int len;
len = sprintf(buf, "0x%08x\n", common->debug_mask);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
unsigned long mask;
char buf[32];
ssize_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strict_strtoul(buf, 0, &mask))
return -EINVAL;
common->debug_mask = mask;
return count;
}
static const struct file_operations fops_debug = {
.read = read_file_debug,
.write = write_file_debug,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
#endif
#define DMA_BUF_LEN 1024
static ssize_t read_file_tx_chainmask(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
char buf[32];
unsigned int len;
len = sprintf(buf, "0x%08x\n", common->tx_chainmask);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_tx_chainmask(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
unsigned long mask;
char buf[32];
ssize_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strict_strtoul(buf, 0, &mask))
return -EINVAL;
common->tx_chainmask = mask;
sc->sc_ah->caps.tx_chainmask = mask;
return count;
}
static const struct file_operations fops_tx_chainmask = {
.read = read_file_tx_chainmask,
.write = write_file_tx_chainmask,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t read_file_rx_chainmask(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
char buf[32];
unsigned int len;
len = sprintf(buf, "0x%08x\n", common->rx_chainmask);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_rx_chainmask(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
unsigned long mask;
char buf[32];
ssize_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strict_strtoul(buf, 0, &mask))
return -EINVAL;
common->rx_chainmask = mask;
sc->sc_ah->caps.rx_chainmask = mask;
return count;
}
static const struct file_operations fops_rx_chainmask = {
.read = read_file_rx_chainmask,
.write = write_file_rx_chainmask,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t read_file_dma(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_hw *ah = sc->sc_ah;
char *buf;
int retval;
unsigned int len = 0;
u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
int i, qcuOffset = 0, dcuOffset = 0;
u32 *qcuBase = &val[0], *dcuBase = &val[4];
buf = kmalloc(DMA_BUF_LEN, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ath9k_ps_wakeup(sc);
REG_WRITE_D(ah, AR_MACMISC,
((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
(AR_MACMISC_MISC_OBS_BUS_1 <<
AR_MACMISC_MISC_OBS_BUS_MSB_S)));
len += snprintf(buf + len, DMA_BUF_LEN - len,
"Raw DMA Debug values:\n");
for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
if (i % 4 == 0)
len += snprintf(buf + len, DMA_BUF_LEN - len, "\n");
val[i] = REG_READ_D(ah, AR_DMADBG_0 + (i * sizeof(u32)));
len += snprintf(buf + len, DMA_BUF_LEN - len, "%d: %08x ",
i, val[i]);
}
len += snprintf(buf + len, DMA_BUF_LEN - len, "\n\n");
len += snprintf(buf + len, DMA_BUF_LEN - len,
"Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
if (i == 8) {
qcuOffset = 0;
qcuBase++;
}
if (i == 6) {
dcuOffset = 0;
dcuBase++;
}
len += snprintf(buf + len, DMA_BUF_LEN - len,
"%2d %2x %1x %2x %2x\n",
i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
(*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
val[2] & (0x7 << (i * 3)) >> (i * 3),
(*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
}
len += snprintf(buf + len, DMA_BUF_LEN - len, "\n");
len += snprintf(buf + len, DMA_BUF_LEN - len,
"qcu_stitch state: %2x qcu_fetch state: %2x\n",
(val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
len += snprintf(buf + len, DMA_BUF_LEN - len,
"qcu_complete state: %2x dcu_complete state: %2x\n",
(val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
len += snprintf(buf + len, DMA_BUF_LEN - len,
"dcu_arb state: %2x dcu_fp state: %2x\n",
(val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
len += snprintf(buf + len, DMA_BUF_LEN - len,
"chan_idle_dur: %3d chan_idle_dur_valid: %1d\n",
(val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
len += snprintf(buf + len, DMA_BUF_LEN - len,
"txfifo_valid_0: %1d txfifo_valid_1: %1d\n",
(val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
len += snprintf(buf + len, DMA_BUF_LEN - len,
"txfifo_dcu_num_0: %2d txfifo_dcu_num_1: %2d\n",
(val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
len += snprintf(buf + len, DMA_BUF_LEN - len, "pcu observe: 0x%x\n",
REG_READ_D(ah, AR_OBS_BUS_1));
len += snprintf(buf + len, DMA_BUF_LEN - len,
"AR_CR: 0x%x\n", REG_READ_D(ah, AR_CR));
ath9k_ps_restore(sc);
if (len > DMA_BUF_LEN)
len = DMA_BUF_LEN;
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return retval;
}
static const struct file_operations fops_dma = {
.read = read_file_dma,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
{
if (status)
sc->debug.stats.istats.total++;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
if (status & ATH9K_INT_RXLP)
sc->debug.stats.istats.rxlp++;
if (status & ATH9K_INT_RXHP)
sc->debug.stats.istats.rxhp++;
if (status & ATH9K_INT_BB_WATCHDOG)
sc->debug.stats.istats.bb_watchdog++;
} else {
if (status & ATH9K_INT_RX)
sc->debug.stats.istats.rxok++;
}
if (status & ATH9K_INT_RXEOL)
sc->debug.stats.istats.rxeol++;
if (status & ATH9K_INT_RXORN)
sc->debug.stats.istats.rxorn++;
if (status & ATH9K_INT_TX)
sc->debug.stats.istats.txok++;
if (status & ATH9K_INT_TXURN)
sc->debug.stats.istats.txurn++;
if (status & ATH9K_INT_MIB)
sc->debug.stats.istats.mib++;
if (status & ATH9K_INT_RXPHY)
sc->debug.stats.istats.rxphyerr++;
if (status & ATH9K_INT_RXKCM)
sc->debug.stats.istats.rx_keycache_miss++;
if (status & ATH9K_INT_SWBA)
sc->debug.stats.istats.swba++;
if (status & ATH9K_INT_BMISS)
sc->debug.stats.istats.bmiss++;
if (status & ATH9K_INT_BNR)
sc->debug.stats.istats.bnr++;
if (status & ATH9K_INT_CST)
sc->debug.stats.istats.cst++;
if (status & ATH9K_INT_GTT)
sc->debug.stats.istats.gtt++;
if (status & ATH9K_INT_TIM)
sc->debug.stats.istats.tim++;
if (status & ATH9K_INT_CABEND)
sc->debug.stats.istats.cabend++;
if (status & ATH9K_INT_DTIMSYNC)
sc->debug.stats.istats.dtimsync++;
if (status & ATH9K_INT_DTIM)
sc->debug.stats.istats.dtim++;
}
static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[512];
unsigned int len = 0;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXLP", sc->debug.stats.istats.rxlp);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXHP", sc->debug.stats.istats.rxhp);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "WATCHDOG",
sc->debug.stats.istats.bb_watchdog);
} else {
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
}
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);
if (len > sizeof(buf))
len = sizeof(buf);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static const struct file_operations fops_interrupt = {
.read = read_file_interrupt,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
void ath_debug_stat_rc(struct ath_softc *sc, int final_rate)
{
struct ath_rc_stats *stats;
stats = &sc->debug.stats.rcstats[final_rate];
stats->success++;
}
void ath_debug_stat_retries(struct ath_softc *sc, int rix,
int xretries, int retries, u8 per)
{
struct ath_rc_stats *stats = &sc->debug.stats.rcstats[rix];
stats->xretries += xretries;
stats->retries += retries;
stats->per = per;
}
static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char *buf;
unsigned int len = 0, max;
int i = 0;
ssize_t retval;
if (sc->cur_rate_table == NULL)
return 0;
max = 80 + sc->cur_rate_table->rate_cnt * 1024 + 1;
buf = kmalloc(max, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
len += sprintf(buf, "%6s %6s %6s "
"%10s %10s %10s %10s\n",
"HT", "MCS", "Rate",
"Success", "Retries", "XRetries", "PER");
for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
u32 ratekbps = sc->cur_rate_table->info[i].ratekbps;
struct ath_rc_stats *stats = &sc->debug.stats.rcstats[i];
char mcs[5];
char htmode[5];
int used_mcs = 0, used_htmode = 0;
if (WLAN_RC_PHY_HT(sc->cur_rate_table->info[i].phy)) {
used_mcs = snprintf(mcs, 5, "%d",
sc->cur_rate_table->info[i].ratecode);
if (WLAN_RC_PHY_40(sc->cur_rate_table->info[i].phy))
used_htmode = snprintf(htmode, 5, "HT40");
else if (WLAN_RC_PHY_20(sc->cur_rate_table->info[i].phy))
used_htmode = snprintf(htmode, 5, "HT20");
else
used_htmode = snprintf(htmode, 5, "????");
}
mcs[used_mcs] = '\0';
htmode[used_htmode] = '\0';
len += snprintf(buf + len, max - len,
"%6s %6s %3u.%d: "
"%10u %10u %10u %10u\n",
htmode,
mcs,
ratekbps / 1000,
(ratekbps % 1000) / 100,
stats->success,
stats->retries,
stats->xretries,
stats->per);
}
if (len > max)
len = max;
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return retval;
}
static const struct file_operations fops_rcstat = {
.read = read_file_rcstat,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
{
switch (state) {
case ATH_WIPHY_INACTIVE:
return "INACTIVE";
case ATH_WIPHY_ACTIVE:
return "ACTIVE";
case ATH_WIPHY_PAUSING:
return "PAUSING";
case ATH_WIPHY_PAUSED:
return "PAUSED";
case ATH_WIPHY_SCAN:
return "SCAN";
}
return "?";
}
static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[512];
unsigned int len = 0;
int i;
u8 addr[ETH_ALEN];
len += snprintf(buf + len, sizeof(buf) - len,
"primary: %s (%s chan=%d ht=%d)\n",
wiphy_name(sc->pri_wiphy->hw->wiphy),
ath_wiphy_state_str(sc->pri_wiphy->state),
sc->pri_wiphy->chan_idx, sc->pri_wiphy->chan_is_ht);
for (i = 0; i < sc->num_sec_wiphy; i++) {
struct ath_wiphy *aphy = sc->sec_wiphy[i];
if (aphy == NULL)
continue;
len += snprintf(buf + len, sizeof(buf) - len,
"secondary: %s (%s chan=%d ht=%d)\n",
wiphy_name(aphy->hw->wiphy),
ath_wiphy_state_str(aphy->state),
aphy->chan_idx, aphy->chan_is_ht);
}
put_unaligned_le32(REG_READ_D(sc->sc_ah, AR_STA_ID0), addr);
put_unaligned_le16(REG_READ_D(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
len += snprintf(buf + len, sizeof(buf) - len,
"addr: %pM\n", addr);
put_unaligned_le32(REG_READ_D(sc->sc_ah, AR_BSSMSKL), addr);
put_unaligned_le16(REG_READ_D(sc->sc_ah, AR_BSSMSKU) & 0xffff, addr + 4);
len += snprintf(buf + len, sizeof(buf) - len,
"addrmask: %pM\n", addr);
if (len > sizeof(buf))
len = sizeof(buf);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static struct ath_wiphy * get_wiphy(struct ath_softc *sc, const char *name)
{
int i;
if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
return sc->pri_wiphy;
for (i = 0; i < sc->num_sec_wiphy; i++) {
struct ath_wiphy *aphy = sc->sec_wiphy[i];
if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
return aphy;
}
return NULL;
}
static int del_wiphy(struct ath_softc *sc, const char *name)
{
struct ath_wiphy *aphy = get_wiphy(sc, name);
if (!aphy)
return -ENOENT;
return ath9k_wiphy_del(aphy);
}
static int pause_wiphy(struct ath_softc *sc, const char *name)
{
struct ath_wiphy *aphy = get_wiphy(sc, name);
if (!aphy)
return -ENOENT;
return ath9k_wiphy_pause(aphy);
}
static int unpause_wiphy(struct ath_softc *sc, const char *name)
{
struct ath_wiphy *aphy = get_wiphy(sc, name);
if (!aphy)
return -ENOENT;
return ath9k_wiphy_unpause(aphy);
}
static int select_wiphy(struct ath_softc *sc, const char *name)
{
struct ath_wiphy *aphy = get_wiphy(sc, name);
if (!aphy)
return -ENOENT;
return ath9k_wiphy_select(aphy);
}
static int schedule_wiphy(struct ath_softc *sc, const char *msec)
{
ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
return 0;
}
static ssize_t write_file_wiphy(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[50];
size_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (len > 0 && buf[len - 1] == '\n')
buf[len - 1] = '\0';
if (strncmp(buf, "add", 3) == 0) {
int res = ath9k_wiphy_add(sc);
if (res < 0)
return res;
} else if (strncmp(buf, "del=", 4) == 0) {
int res = del_wiphy(sc, buf + 4);
if (res < 0)
return res;
} else if (strncmp(buf, "pause=", 6) == 0) {
int res = pause_wiphy(sc, buf + 6);
if (res < 0)
return res;
} else if (strncmp(buf, "unpause=", 8) == 0) {
int res = unpause_wiphy(sc, buf + 8);
if (res < 0)
return res;
} else if (strncmp(buf, "select=", 7) == 0) {
int res = select_wiphy(sc, buf + 7);
if (res < 0)
return res;
} else if (strncmp(buf, "schedule=", 9) == 0) {
int res = schedule_wiphy(sc, buf + 9);
if (res < 0)
return res;
} else
return -EOPNOTSUPP;
return count;
}
static const struct file_operations fops_wiphy = {
.read = read_file_wiphy,
.write = write_file_wiphy,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
#define PR(str, elem) \
do { \
len += snprintf(buf + len, size - len, \
"%s%13u%11u%10u%10u\n", str, \
sc->debug.stats.txstats[sc->tx.hwq_map[WME_AC_BE]].elem, \
sc->debug.stats.txstats[sc->tx.hwq_map[WME_AC_BK]].elem, \
sc->debug.stats.txstats[sc->tx.hwq_map[WME_AC_VI]].elem, \
sc->debug.stats.txstats[sc->tx.hwq_map[WME_AC_VO]].elem); \
} while(0)
static ssize_t read_file_xmit(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char *buf;
unsigned int len = 0, size = 2048;
ssize_t retval = 0;
buf = kzalloc(size, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
len += sprintf(buf, "%30s %10s%10s%10s\n\n", "BE", "BK", "VI", "VO");
PR("MPDUs Queued: ", queued);
PR("MPDUs Completed: ", completed);
PR("Aggregates: ", a_aggr);
PR("AMPDUs Queued: ", a_queued);
PR("AMPDUs Completed:", a_completed);
PR("AMPDUs Retried: ", a_retries);
PR("AMPDUs XRetried: ", a_xretries);
PR("FIFO Underrun: ", fifo_underrun);
PR("TXOP Exceeded: ", xtxop);
PR("TXTIMER Expiry: ", timer_exp);
PR("DESC CFG Error: ", desc_cfg_err);
PR("DATA Underrun: ", data_underrun);
PR("DELIM Underrun: ", delim_underrun);
if (len > size)
len = size;
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return retval;
}
void ath_debug_stat_tx(struct ath_softc *sc, struct ath_txq *txq,
struct ath_buf *bf, struct ath_tx_status *ts)
{
if (bf_isampdu(bf)) {
if (bf_isxretried(bf))
TX_STAT_INC(txq->axq_qnum, a_xretries);
else
TX_STAT_INC(txq->axq_qnum, a_completed);
} else {
TX_STAT_INC(txq->axq_qnum, completed);
}
if (ts->ts_status & ATH9K_TXERR_FIFO)
TX_STAT_INC(txq->axq_qnum, fifo_underrun);
if (ts->ts_status & ATH9K_TXERR_XTXOP)
TX_STAT_INC(txq->axq_qnum, xtxop);
if (ts->ts_status & ATH9K_TXERR_TIMER_EXPIRED)
TX_STAT_INC(txq->axq_qnum, timer_exp);
if (ts->ts_flags & ATH9K_TX_DESC_CFG_ERR)
TX_STAT_INC(txq->axq_qnum, desc_cfg_err);
if (ts->ts_flags & ATH9K_TX_DATA_UNDERRUN)
TX_STAT_INC(txq->axq_qnum, data_underrun);
if (ts->ts_flags & ATH9K_TX_DELIM_UNDERRUN)
TX_STAT_INC(txq->axq_qnum, delim_underrun);
}
static const struct file_operations fops_xmit = {
.read = read_file_xmit,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t read_file_recv(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
#define PHY_ERR(s, p) \
len += snprintf(buf + len, size - len, "%18s : %10u\n", s, \
sc->debug.stats.rxstats.phy_err_stats[p]);
struct ath_softc *sc = file->private_data;
char *buf;
unsigned int len = 0, size = 1152;
ssize_t retval = 0;
buf = kzalloc(size, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "CRC ERR",
sc->debug.stats.rxstats.crc_err);
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "DECRYPT CRC ERR",
sc->debug.stats.rxstats.decrypt_crc_err);
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "PHY ERR",
sc->debug.stats.rxstats.phy_err);
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "MIC ERR",
sc->debug.stats.rxstats.mic_err);
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "PRE-DELIM CRC ERR",
sc->debug.stats.rxstats.pre_delim_crc_err);
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "POST-DELIM CRC ERR",
sc->debug.stats.rxstats.post_delim_crc_err);
len += snprintf(buf + len, size - len,
"%18s : %10u\n", "DECRYPT BUSY ERR",
sc->debug.stats.rxstats.decrypt_busy_err);
PHY_ERR("UNDERRUN", ATH9K_PHYERR_UNDERRUN);
PHY_ERR("TIMING", ATH9K_PHYERR_TIMING);
PHY_ERR("PARITY", ATH9K_PHYERR_PARITY);
PHY_ERR("RATE", ATH9K_PHYERR_RATE);
PHY_ERR("LENGTH", ATH9K_PHYERR_LENGTH);
PHY_ERR("RADAR", ATH9K_PHYERR_RADAR);
PHY_ERR("SERVICE", ATH9K_PHYERR_SERVICE);
PHY_ERR("TOR", ATH9K_PHYERR_TOR);
PHY_ERR("OFDM-TIMING", ATH9K_PHYERR_OFDM_TIMING);
PHY_ERR("OFDM-SIGNAL-PARITY", ATH9K_PHYERR_OFDM_SIGNAL_PARITY);
PHY_ERR("OFDM-RATE", ATH9K_PHYERR_OFDM_RATE_ILLEGAL);
PHY_ERR("OFDM-LENGTH", ATH9K_PHYERR_OFDM_LENGTH_ILLEGAL);
PHY_ERR("OFDM-POWER-DROP", ATH9K_PHYERR_OFDM_POWER_DROP);
PHY_ERR("OFDM-SERVICE", ATH9K_PHYERR_OFDM_SERVICE);
PHY_ERR("OFDM-RESTART", ATH9K_PHYERR_OFDM_RESTART);
PHY_ERR("FALSE-RADAR-EXT", ATH9K_PHYERR_FALSE_RADAR_EXT);
PHY_ERR("CCK-TIMING", ATH9K_PHYERR_CCK_TIMING);
PHY_ERR("CCK-HEADER-CRC", ATH9K_PHYERR_CCK_HEADER_CRC);
PHY_ERR("CCK-RATE", ATH9K_PHYERR_CCK_RATE_ILLEGAL);
PHY_ERR("CCK-SERVICE", ATH9K_PHYERR_CCK_SERVICE);
PHY_ERR("CCK-RESTART", ATH9K_PHYERR_CCK_RESTART);
PHY_ERR("CCK-LENGTH", ATH9K_PHYERR_CCK_LENGTH_ILLEGAL);
PHY_ERR("CCK-POWER-DROP", ATH9K_PHYERR_CCK_POWER_DROP);
PHY_ERR("HT-CRC", ATH9K_PHYERR_HT_CRC_ERROR);
PHY_ERR("HT-LENGTH", ATH9K_PHYERR_HT_LENGTH_ILLEGAL);
PHY_ERR("HT-RATE", ATH9K_PHYERR_HT_RATE_ILLEGAL);
if (len > size)
len = size;
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return retval;
#undef PHY_ERR
}
void ath_debug_stat_rx(struct ath_softc *sc, struct ath_rx_status *rs)
{
#define RX_STAT_INC(c) sc->debug.stats.rxstats.c++
#define RX_PHY_ERR_INC(c) sc->debug.stats.rxstats.phy_err_stats[c]++
u32 phyerr;
if (rs->rs_status & ATH9K_RXERR_CRC)
RX_STAT_INC(crc_err);
if (rs->rs_status & ATH9K_RXERR_DECRYPT)
RX_STAT_INC(decrypt_crc_err);
if (rs->rs_status & ATH9K_RXERR_MIC)
RX_STAT_INC(mic_err);
if (rs->rs_status & ATH9K_RX_DELIM_CRC_PRE)
RX_STAT_INC(pre_delim_crc_err);
if (rs->rs_status & ATH9K_RX_DELIM_CRC_POST)
RX_STAT_INC(post_delim_crc_err);
if (rs->rs_status & ATH9K_RX_DECRYPT_BUSY)
RX_STAT_INC(decrypt_busy_err);
if (rs->rs_status & ATH9K_RXERR_PHY) {
RX_STAT_INC(phy_err);
phyerr = rs->rs_phyerr & 0x24;
RX_PHY_ERR_INC(phyerr);
}
#undef RX_STAT_INC
#undef RX_PHY_ERR_INC
}
static const struct file_operations fops_recv = {
.read = read_file_recv,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t read_file_regidx(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[32];
unsigned int len;
len = sprintf(buf, "0x%08x\n", sc->debug.regidx);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_regidx(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
unsigned long regidx;
char buf[32];
ssize_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strict_strtoul(buf, 0, &regidx))
return -EINVAL;
sc->debug.regidx = regidx;
return count;
}
static const struct file_operations fops_regidx = {
.read = read_file_regidx,
.write = write_file_regidx,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t read_file_regval(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_hw *ah = sc->sc_ah;
char buf[32];
unsigned int len;
u32 regval;
regval = REG_READ_D(ah, sc->debug.regidx);
len = sprintf(buf, "0x%08x\n", regval);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_regval(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_hw *ah = sc->sc_ah;
unsigned long regval;
char buf[32];
ssize_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strict_strtoul(buf, 0, &regval))
return -EINVAL;
REG_WRITE_D(ah, sc->debug.regidx, regval);
return count;
}
static const struct file_operations fops_regval = {
.read = read_file_regval,
.write = write_file_regval,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
int ath9k_init_debug(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath_softc *sc = (struct ath_softc *) common->priv;
if (!ath9k_debugfs_root)
return -ENOENT;
sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
ath9k_debugfs_root);
if (!sc->debug.debugfs_phy)
return -ENOMEM;
#ifdef CONFIG_ATH_DEBUG
if (!debugfs_create_file("debug", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_debug))
goto err;
#endif
if (!debugfs_create_file("dma", S_IRUSR, sc->debug.debugfs_phy,
sc, &fops_dma))
goto err;
if (!debugfs_create_file("interrupt", S_IRUSR, sc->debug.debugfs_phy,
sc, &fops_interrupt))
goto err;
if (!debugfs_create_file("rcstat", S_IRUSR, sc->debug.debugfs_phy,
sc, &fops_rcstat))
goto err;
if (!debugfs_create_file("wiphy", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_wiphy))
goto err;
if (!debugfs_create_file("xmit", S_IRUSR, sc->debug.debugfs_phy,
sc, &fops_xmit))
goto err;
if (!debugfs_create_file("recv", S_IRUSR, sc->debug.debugfs_phy,
sc, &fops_recv))
goto err;
if (!debugfs_create_file("rx_chainmask", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_rx_chainmask))
goto err;
if (!debugfs_create_file("tx_chainmask", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_tx_chainmask))
goto err;
if (!debugfs_create_file("regidx", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_regidx))
goto err;
if (!debugfs_create_file("regval", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_regval))
goto err;
if (!debugfs_create_bool("ignore_extcca", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, &ah->config.cwm_ignore_extcca))
goto err;
sc->debug.regidx = 0;
return 0;
err:
ath9k_exit_debug(ah);
return -ENOMEM;
}
void ath9k_exit_debug(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath_softc *sc = (struct ath_softc *) common->priv;
debugfs_remove_recursive(sc->debug.debugfs_phy);
}
int ath9k_debug_create_root(void)
{
ath9k_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
if (!ath9k_debugfs_root)
return -ENOENT;
return 0;
}
void ath9k_debug_remove_root(void)
{
debugfs_remove(ath9k_debugfs_root);
ath9k_debugfs_root = NULL;
}
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