From 8786123b51984c518436911048668f9673f30cdf Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Wed, 16 Jun 2010 19:12:34 +0900 Subject: [PATCH] ath5k: review RX descriptor functions Reviewed RX descriptor functions against the HAL sources. Some minor changes: - check size before making changes to the descriptor - whitespace - add comments about 5210 timestamps. this needs to be adressed later! - FIFO overrun error only available on 5210 - rs_phyerr should not be OR'ed - clear the whole ath5k_rx_status structure before using, instead of zeroing specific fields. Signed-off-by: Bruno Randolf Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/desc.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/ath/ath5k/desc.c b/drivers/net/wireless/ath/ath5k/desc.c index 019525d..c0037b6 100644 --- a/drivers/net/wireless/ath/ath5k/desc.c +++ b/drivers/net/wireless/ath/ath5k/desc.c @@ -499,10 +499,11 @@ int ath5k_hw_setup_rx_desc(struct ath5k_hw *ah, struct ath5k_desc *desc, */ memset(&desc->ud.ds_rx, 0, sizeof(struct ath5k_hw_all_rx_desc)); + if (unlikely(size & ~AR5K_DESC_RX_CTL1_BUF_LEN)) + return -EINVAL; + /* Setup descriptor */ rx_ctl->rx_control_1 = size & AR5K_DESC_RX_CTL1_BUF_LEN; - if (unlikely(rx_ctl->rx_control_1 != size)) - return -EINVAL; if (flags & AR5K_RXDESC_INTREQ) rx_ctl->rx_control_1 |= AR5K_DESC_RX_CTL1_INTREQ; @@ -522,9 +523,11 @@ static int ath5k_hw_proc_5210_rx_status(struct ath5k_hw *ah, /* No frame received / not ready */ if (unlikely(!(rx_status->rx_status_1 & - AR5K_5210_RX_DESC_STATUS1_DONE))) + AR5K_5210_RX_DESC_STATUS1_DONE))) return -EINPROGRESS; + memset(rs, 0, sizeof(struct ath5k_rx_status)); + /* * Frame receive status */ @@ -536,7 +539,11 @@ static int ath5k_hw_proc_5210_rx_status(struct ath5k_hw *ah, AR5K_5210_RX_DESC_STATUS0_RECEIVE_RATE); rs->rs_more = !!(rx_status->rx_status_0 & AR5K_5210_RX_DESC_STATUS0_MORE); - /* TODO: this timestamp is 13 bit, later on we assume 15 bit */ + /* TODO: this timestamp is 13 bit, later on we assume 15 bit! + * also the HAL code for 5210 says the timestamp is bits [10..22] of the + * TSF, and extends the timestamp here to 15 bit. + * we need to check on 5210... + */ rs->rs_tstamp = AR5K_REG_MS(rx_status->rx_status_1, AR5K_5210_RX_DESC_STATUS1_RECEIVE_TIMESTAMP); @@ -548,9 +555,6 @@ static int ath5k_hw_proc_5210_rx_status(struct ath5k_hw *ah, AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANT_5210) ? 2 : 1; - rs->rs_status = 0; - rs->rs_phyerr = 0; - /* * Key table status */ @@ -564,19 +568,21 @@ static int ath5k_hw_proc_5210_rx_status(struct ath5k_hw *ah, * Receive/descriptor errors */ if (!(rx_status->rx_status_1 & - AR5K_5210_RX_DESC_STATUS1_FRAME_RECEIVE_OK)) { + AR5K_5210_RX_DESC_STATUS1_FRAME_RECEIVE_OK)) { if (rx_status->rx_status_1 & AR5K_5210_RX_DESC_STATUS1_CRC_ERROR) rs->rs_status |= AR5K_RXERR_CRC; - if (rx_status->rx_status_1 & - AR5K_5210_RX_DESC_STATUS1_FIFO_OVERRUN_5210) + /* only on 5210 */ + if ((ah->ah_version == AR5K_AR5210) && + (rx_status->rx_status_1 & + AR5K_5210_RX_DESC_STATUS1_FIFO_OVERRUN_5210)) rs->rs_status |= AR5K_RXERR_FIFO; if (rx_status->rx_status_1 & AR5K_5210_RX_DESC_STATUS1_PHY_ERROR) { rs->rs_status |= AR5K_RXERR_PHY; - rs->rs_phyerr |= AR5K_REG_MS(rx_status->rx_status_1, + rs->rs_phyerr = AR5K_REG_MS(rx_status->rx_status_1, AR5K_5210_RX_DESC_STATUS1_PHY_ERROR); } @@ -604,6 +610,8 @@ static int ath5k_hw_proc_5212_rx_status(struct ath5k_hw *ah, AR5K_5212_RX_DESC_STATUS1_DONE))) return -EINPROGRESS; + memset(rs, 0, sizeof(struct ath5k_rx_status)); + /* * Frame receive status */ @@ -619,8 +627,6 @@ static int ath5k_hw_proc_5212_rx_status(struct ath5k_hw *ah, AR5K_5212_RX_DESC_STATUS0_MORE); rs->rs_tstamp = AR5K_REG_MS(rx_status->rx_status_1, AR5K_5212_RX_DESC_STATUS1_RECEIVE_TIMESTAMP); - rs->rs_status = 0; - rs->rs_phyerr = 0; /* * Key table status @@ -643,7 +649,7 @@ static int ath5k_hw_proc_5212_rx_status(struct ath5k_hw *ah, if (rx_status->rx_status_1 & AR5K_5212_RX_DESC_STATUS1_PHY_ERROR) { rs->rs_status |= AR5K_RXERR_PHY; - rs->rs_phyerr |= AR5K_REG_MS(rx_status->rx_status_1, + rs->rs_phyerr = AR5K_REG_MS(rx_status->rx_status_1, AR5K_5212_RX_DESC_STATUS1_PHY_ERROR_CODE); ath5k_ani_phy_error_report(ah, rs->rs_phyerr); } -- 2.7.4