diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/debug.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/debug.c | 43 |
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c index 9489b6b25b5..42d2a506845 100644 --- a/drivers/net/wireless/ath/ath9k/debug.c +++ b/drivers/net/wireless/ath/ath9k/debug.c @@ -75,17 +75,24 @@ static const struct file_operations fops_debug = { #endif +#define DMA_BUF_LEN 1024 + 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[1024]; + 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 0; + ath9k_ps_wakeup(sc); REG_WRITE_D(ah, AR_MACMISC, @@ -93,20 +100,20 @@ static ssize_t read_file_dma(struct file *file, char __user *user_buf, (AR_MACMISC_MISC_OBS_BUS_1 << AR_MACMISC_MISC_OBS_BUS_MSB_S))); - len += snprintf(buf + len, sizeof(buf) - len, + 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, sizeof(buf) - len, "\n"); + 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, sizeof(buf) - len, "%d: %08x ", + len += snprintf(buf + len, DMA_BUF_LEN - len, "%d: %08x ", i, val[i]); } - len += snprintf(buf + len, sizeof(buf) - len, "\n\n"); - len += snprintf(buf + len, sizeof(buf) - len, + 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) { @@ -120,7 +127,7 @@ static ssize_t read_file_dma(struct file *file, char __user *user_buf, dcuBase++; } - len += snprintf(buf + len, sizeof(buf) - len, + len += snprintf(buf + len, DMA_BUF_LEN - len, "%2d %2x %1x %2x %2x\n", i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset, (*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3), @@ -128,35 +135,37 @@ static ssize_t read_file_dma(struct file *file, char __user *user_buf, (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset); } - len += snprintf(buf + len, sizeof(buf) - len, "\n"); + len += snprintf(buf + len, DMA_BUF_LEN - len, "\n"); - len += snprintf(buf + len, sizeof(buf) - len, + 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, sizeof(buf) - len, + 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, sizeof(buf) - len, + 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, sizeof(buf) - len, + 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, sizeof(buf) - len, + 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, sizeof(buf) - len, + 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, sizeof(buf) - len, "pcu observe: 0x%x \n", + 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, sizeof(buf) - len, + len += snprintf(buf + len, DMA_BUF_LEN - len, "AR_CR: 0x%x \n", REG_READ_D(ah, AR_CR)); ath9k_ps_restore(sc); - return simple_read_from_buffer(user_buf, count, ppos, buf, len); + retval = simple_read_from_buffer(user_buf, count, ppos, buf, len); + kfree(buf); + return retval; } static const struct file_operations fops_dma = { |