From 2a163c6de452c0b321396caceac5d163949b4cf2 Mon Sep 17 00:00:00 2001 From: Sujith Date: Fri, 28 Nov 2008 22:21:08 +0530 Subject: [PATCH] ath9k: Add a debugfs file for dumping DMA status Debugfs file location: ath9k//dma Contains values in DMA debug registers. Signed-off-by: Sujith Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/ath9k.h | 1 - drivers/net/wireless/ath9k/beacon.c | 1 - drivers/net/wireless/ath9k/core.h | 1 + drivers/net/wireless/ath9k/debug.c | 100 ++++++++++++++++++++++++++++ drivers/net/wireless/ath9k/mac.c | 72 -------------------- drivers/net/wireless/ath9k/main.c | 1 + 6 files changed, 102 insertions(+), 74 deletions(-) diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h index 5b9bc545e964..9eaa3fce631c 100644 --- a/drivers/net/wireless/ath9k/ath9k.h +++ b/drivers/net/wireless/ath9k/ath9k.h @@ -1009,7 +1009,6 @@ enum ath9k_int ath9k_hw_set_interrupts(struct ath_hal *ah, enum ath9k_int ints); /* MAC (PCU/QCU) */ -void ath9k_hw_dmaRegDump(struct ath_hal *ah); u32 ath9k_hw_gettxbuf(struct ath_hal *ah, u32 q); bool ath9k_hw_puttxbuf(struct ath_hal *ah, u32 q, u32 txdp); bool ath9k_hw_txstart(struct ath_hal *ah, u32 q); diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c index 88fbfe5bb7b5..ca5782fa7627 100644 --- a/drivers/net/wireless/ath9k/beacon.c +++ b/drivers/net/wireless/ath9k/beacon.c @@ -492,7 +492,6 @@ void ath9k_beacon_tasklet(unsigned long data) DPRINTF(sc, ATH_DBG_BEACON, "beacon is officially " "stuck\n"); - ath9k_hw_dmaRegDump(ah); } } else { DPRINTF(sc, ATH_DBG_BEACON, diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h index 5b755582b33e..8c11c0f5c644 100644 --- a/drivers/net/wireless/ath9k/core.h +++ b/drivers/net/wireless/ath9k/core.h @@ -92,6 +92,7 @@ struct ath9k_debug { int debug_mask; struct dentry *debugfs_root; struct dentry *debugfs_phy; + struct dentry *debugfs_dma; }; void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...); diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c index c146e484ef54..da52812c3a94 100644 --- a/drivers/net/wireless/ath9k/debug.c +++ b/drivers/net/wireless/ath9k/debug.c @@ -15,6 +15,8 @@ */ #include "core.h" +#include "reg.h" +#include "hw.h" static unsigned int ath9k_debug = DBG_DEFAULT; module_param_named(debug, ath9k_debug, uint, 0); @@ -34,6 +36,98 @@ void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...) } } +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 +}; + int ath9k_init_debug(struct ath_softc *sc) { sc->sc_debug.debug_mask = ath9k_debug; @@ -47,6 +141,11 @@ int ath9k_init_debug(struct ath_softc *sc) 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; + return 0; err: ath9k_exit_debug(sc); @@ -55,6 +154,7 @@ int ath9k_init_debug(struct ath_softc *sc) void ath9k_exit_debug(struct ath_softc *sc) { + debugfs_remove(sc->sc_debug.debugfs_dma); debugfs_remove(sc->sc_debug.debugfs_phy); debugfs_remove(sc->sc_debug.debugfs_root); } diff --git a/drivers/net/wireless/ath9k/mac.c b/drivers/net/wireless/ath9k/mac.c index 8d2b139818ee..a4e98986dbcd 100644 --- a/drivers/net/wireless/ath9k/mac.c +++ b/drivers/net/wireless/ath9k/mac.c @@ -40,78 +40,6 @@ static void ath9k_hw_set_txq_interrupts(struct ath_hal *ah, AR_IMR_S2_QCU_TXURN, ahp->ah_txUrnInterruptMask); } -void ath9k_hw_dmaRegDump(struct ath_hal *ah) -{ - u32 val[ATH9K_NUM_DMA_DEBUG_REGS]; - int qcuOffset = 0, dcuOffset = 0; - u32 *qcuBase = &val[0], *dcuBase = &val[4]; - int i; - - 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))); - - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, "Raw DMA Debug values:\n"); - - for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) { - if (i % 4 == 0) - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, "\n"); - - val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32))); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, "%d: %08x ", i, val[i]); - } - - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, "\n\n"); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "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++; - } - - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "%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); - } - - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, "\n"); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "qcu_stitch state: %2x qcu_fetch state: %2x\n", - (val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "qcu_complete state: %2x dcu_complete state: %2x\n", - (val[3] & 0x1c000000) >> 26, (val[6] & 0x3)); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "dcu_arb state: %2x dcu_fp state: %2x\n", - (val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "chan_idle_dur: %3d chan_idle_dur_valid: %1d\n", - (val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "txfifo_valid_0: %1d txfifo_valid_1: %1d\n", - (val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "txfifo_dcu_num_0: %2d txfifo_dcu_num_1: %2d\n", - (val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17); - - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, "pcu observe 0x%x \n", - REG_READ(ah, AR_OBS_BUS_1)); - DPRINTF(ah->ah_sc, ATH_DBG_REG_IO, - "AR_CR 0x%x \n", REG_READ(ah, AR_CR)); -} - u32 ath9k_hw_gettxbuf(struct ath_hal *ah, u32 q) { return REG_READ(ah, AR_QTXDP(q)); diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 71389643b1b1..ac37605d65af 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -17,6 +17,7 @@ #include #include "core.h" #include "reg.h" +#include "hw.h" #define ATH_PCI_VERSION "0.1" -- GitLab