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kernel-ark/drivers/net/wireless/ath9k/debug.c
Alina Friedrichsen 27abe060aa ath9k: Read and write the TSF via debugfs 
This patch adds an ath9k specific entry to read, write and reset the TSF into the debugfs, like in ath5k. This makes debugging the IBSS handling of wifi drivers _much_ easier.

Signed-off-by: Alina Friedrichsen <x-alina@gmx.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-29 16:01:22 -05:00

312 lines
10 KiB
C
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/*
* Copyright (c) 2008 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 "core.h"
#include "reg.h"
#include "hw.h"
static unsigned int ath9k_debug = DBG_DEFAULT;
module_param_named(debug, ath9k_debug, uint, 0);
void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
{
if (!sc)
return;
if (sc->sc_debug.debug_mask & dbg_mask) {
va_list args;
va_start(args, fmt);
printk(KERN_DEBUG "ath9k: ");
vprintk(fmt, args);
va_end(args);
}
}
static int ath9k_debugfs_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
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_hal *ah = sc->sc_ah;
char buf[1024];
unsigned int len = 0;
u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
int i, qcuOffset = 0, dcuOffset = 0;
u32 *qcuBase = &val[0], *dcuBase = &val[4];
REG_WRITE(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, sizeof(buf) - len,
"Raw DMA Debug values:\n");
for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
if (i % 4 == 0)
len += snprintf(buf + len, sizeof(buf) - len, "\n");
val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
i, val[i]);
}
len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
len += snprintf(buf + len, sizeof(buf) - 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, sizeof(buf) - 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, sizeof(buf) - len, "\n");
len += snprintf(buf + len, sizeof(buf) - len,
"qcu_stitch state: %2x qcu_fetch state: %2x\n",
(val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
len += snprintf(buf + len, sizeof(buf) - len,
"qcu_complete state: %2x dcu_complete state: %2x\n",
(val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
len += snprintf(buf + len, sizeof(buf) - len,
"dcu_arb state: %2x dcu_fp state: %2x\n",
(val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
len += snprintf(buf + len, sizeof(buf) - len,
"chan_idle_dur: %3d chan_idle_dur_valid: %1d\n",
(val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
len += snprintf(buf + len, sizeof(buf) - len,
"txfifo_valid_0: %1d txfifo_valid_1: %1d\n",
(val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
len += snprintf(buf + len, sizeof(buf) - len,
"txfifo_dcu_num_0: %2d txfifo_dcu_num_1: %2d\n",
(val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
REG_READ(ah, AR_OBS_BUS_1));
len += snprintf(buf + len, sizeof(buf) - len,
"AR_CR: 0x%x \n", REG_READ(ah, AR_CR));
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static const struct file_operations fops_dma = {
.read = read_file_dma,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE
};
void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
{
if (status)
sc->sc_debug.stats.istats.total++;
if (status & ATH9K_INT_RX)
sc->sc_debug.stats.istats.rxok++;
if (status & ATH9K_INT_RXEOL)
sc->sc_debug.stats.istats.rxeol++;
if (status & ATH9K_INT_RXORN)
sc->sc_debug.stats.istats.rxorn++;
if (status & ATH9K_INT_TX)
sc->sc_debug.stats.istats.txok++;
if (status & ATH9K_INT_TXURN)
sc->sc_debug.stats.istats.txurn++;
if (status & ATH9K_INT_MIB)
sc->sc_debug.stats.istats.mib++;
if (status & ATH9K_INT_RXPHY)
sc->sc_debug.stats.istats.rxphyerr++;
if (status & ATH9K_INT_RXKCM)
sc->sc_debug.stats.istats.rx_keycache_miss++;
if (status & ATH9K_INT_SWBA)
sc->sc_debug.stats.istats.swba++;
if (status & ATH9K_INT_BMISS)
sc->sc_debug.stats.istats.bmiss++;
if (status & ATH9K_INT_BNR)
sc->sc_debug.stats.istats.bnr++;
if (status & ATH9K_INT_CST)
sc->sc_debug.stats.istats.cst++;
if (status & ATH9K_INT_GTT)
sc->sc_debug.stats.istats.gtt++;
if (status & ATH9K_INT_TIM)
sc->sc_debug.stats.istats.tim++;
if (status & ATH9K_INT_CABEND)
sc->sc_debug.stats.istats.cabend++;
if (status & ATH9K_INT_DTIMSYNC)
sc->sc_debug.stats.istats.dtimsync++;
if (status & ATH9K_INT_DTIM)
sc->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;
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RX", sc->sc_debug.stats.istats.rxok);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXEOL", sc->sc_debug.stats.istats.rxeol);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXORN", sc->sc_debug.stats.istats.rxorn);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TX", sc->sc_debug.stats.istats.txok);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TXURN", sc->sc_debug.stats.istats.txurn);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "MIB", sc->sc_debug.stats.istats.mib);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXPHY", sc->sc_debug.stats.istats.rxphyerr);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXKCM", sc->sc_debug.stats.istats.rx_keycache_miss);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "SWBA", sc->sc_debug.stats.istats.swba);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "BMISS", sc->sc_debug.stats.istats.bmiss);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "BNR", sc->sc_debug.stats.istats.bnr);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "CST", sc->sc_debug.stats.istats.cst);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "GTT", sc->sc_debug.stats.istats.gtt);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TIM", sc->sc_debug.stats.istats.tim);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "CABEND", sc->sc_debug.stats.istats.cabend);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "DTIMSYNC", sc->sc_debug.stats.istats.dtimsync);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "DTIM", sc->sc_debug.stats.istats.dtim);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "TOTAL", sc->sc_debug.stats.istats.total);
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
};
static ssize_t read_file_tsf(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[100];
snprintf(buf, sizeof(buf), "0x%016llx\n",
(unsigned long long)ath9k_hw_gettsf64(sc->sc_ah));
return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
}
static ssize_t write_file_tsf(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[21];
unsigned long long tsf;
if (copy_from_user(buf, user_buf, min(count, sizeof(buf) - 1)))
return -EFAULT;
buf[sizeof(buf) - 1] = '\0';
if (strncmp(buf, "reset", 5) == 0) {
ath9k_hw_reset_tsf(sc->sc_ah);
printk(KERN_INFO "debugfs reset TSF\n");
} else {
tsf = simple_strtoul(buf, NULL, 0);
ath9k_hw_settsf64(sc->sc_ah, tsf);
printk(KERN_INFO "debugfs set TSF to %#018llx\n", tsf);
}
return count;
}
static const struct file_operations fops_tsf = {
.read = read_file_tsf,
.write = write_file_tsf,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE
};
int ath9k_init_debug(struct ath_softc *sc)
{
sc->sc_debug.debug_mask = ath9k_debug;
sc->sc_debug.debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
if (!sc->sc_debug.debugfs_root)
goto err;
sc->sc_debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
sc->sc_debug.debugfs_root);
if (!sc->sc_debug.debugfs_phy)
goto err;
sc->sc_debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
sc->sc_debug.debugfs_phy, sc, &fops_dma);
if (!sc->sc_debug.debugfs_dma)
goto err;
sc->sc_debug.debugfs_interrupt = debugfs_create_file("interrupt",
S_IRUGO,
sc->sc_debug.debugfs_phy,
sc, &fops_interrupt);
if (!sc->sc_debug.debugfs_interrupt)
goto err;
sc->sc_debug.debugfs_tsf = debugfs_create_file("tsf", S_IRUGO,
sc->sc_debug.debugfs_phy, sc, &fops_tsf);
if (!sc->sc_debug.debugfs_tsf)
goto err;
return 0;
err:
ath9k_exit_debug(sc);
return -ENOMEM;
}
void ath9k_exit_debug(struct ath_softc *sc)
{
debugfs_remove(sc->sc_debug.debugfs_tsf);
debugfs_remove(sc->sc_debug.debugfs_interrupt);
debugfs_remove(sc->sc_debug.debugfs_dma);
debugfs_remove(sc->sc_debug.debugfs_phy);
debugfs_remove(sc->sc_debug.debugfs_root);
}
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