diff options
Diffstat (limited to 'drivers/net/wireless/ath')
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/txrx_edma.c | 21 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/txrx_edma.h | 41 |
2 files changed, 41 insertions, 21 deletions
diff --git a/drivers/net/wireless/ath/wil6210/txrx_edma.c b/drivers/net/wireless/ath/wil6210/txrx_edma.c index 48098ae62677..492f7bdf39d9 100644 --- a/drivers/net/wireless/ath/wil6210/txrx_edma.c +++ b/drivers/net/wireless/ath/wil6210/txrx_edma.c @@ -807,18 +807,9 @@ static int wil_rx_error_check_edma(struct wil6210_priv *wil, struct sk_buff *skb, struct wil_net_stats *stats) { - int error; int l2_rx_status; - int l3_rx_status; - int l4_rx_status; void *msg = wil_skb_rxstatus(skb); - error = wil_rx_status_get_error(msg); - if (!error) { - skb->ip_summed = CHECKSUM_UNNECESSARY; - return 0; - } - l2_rx_status = wil_rx_status_get_l2_rx_status(msg); if (l2_rx_status != 0) { wil_dbg_txrx(wil, "L2 RX error, l2_rx_status=0x%x\n", @@ -847,17 +838,7 @@ static int wil_rx_error_check_edma(struct wil6210_priv *wil, return -EFAULT; } - l3_rx_status = wil_rx_status_get_l3_rx_status(msg); - l4_rx_status = wil_rx_status_get_l4_rx_status(msg); - if (!l3_rx_status && !l4_rx_status) - skb->ip_summed = CHECKSUM_UNNECESSARY; - /* If HW reports bad checksum, let IP stack re-check it - * For example, HW don't understand Microsoft IP stack that - * mis-calculates TCP checksum - if it should be 0x0, - * it writes 0xffff in violation of RFC 1624 - */ - else - stats->rx_csum_err++; + skb->ip_summed = wil_rx_status_get_checksum(msg, stats); return 0; } diff --git a/drivers/net/wireless/ath/wil6210/txrx_edma.h b/drivers/net/wireless/ath/wil6210/txrx_edma.h index 343516a03a1e..9cf9ecf6e8cf 100644 --- a/drivers/net/wireless/ath/wil6210/txrx_edma.h +++ b/drivers/net/wireless/ath/wil6210/txrx_edma.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012-2016,2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2012-2016,2018-2019, The Linux Foundation. All rights reserved. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -511,6 +511,45 @@ static inline int wil_rx_status_get_l4_rx_status(void *msg) 5, 6); } +/* L4 L3 Expected result + * 0 0 Ok. No L3 and no L4 known protocols found. + * Treated as L2 packet. (no offloads on this packet) + * 0 1 Ok. It means that L3 was found, and checksum check passed. + * No known L4 protocol was found. + * 0 2 It means that L3 protocol was found, and checksum check failed. + * No L4 known protocol was found. + * 1 any Ok. It means that L4 was found, and checksum check passed. + * 3 0 Not a possible scenario. + * 3 1 Recalculate. It means that L3 protocol was found, and checksum + * passed. But L4 checksum failed. Need to see if really failed, + * or due to fragmentation. + * 3 2 Both L3 and L4 checksum check failed. + */ +static inline int wil_rx_status_get_checksum(void *msg, + struct wil_net_stats *stats) +{ + int l3_rx_status = wil_rx_status_get_l3_rx_status(msg); + int l4_rx_status = wil_rx_status_get_l4_rx_status(msg); + + if (l4_rx_status == 1) + return CHECKSUM_UNNECESSARY; + + if (l4_rx_status == 0 && l3_rx_status == 1) + return CHECKSUM_UNNECESSARY; + + if (l3_rx_status == 0 && l4_rx_status == 0) + /* L2 packet */ + return CHECKSUM_NONE; + + /* If HW reports bad checksum, let IP stack re-check it + * For example, HW doesn't understand Microsoft IP stack that + * mis-calculates TCP checksum - if it should be 0x0, + * it writes 0xffff in violation of RFC 1624 + */ + stats->rx_csum_err++; + return CHECKSUM_NONE; +} + static inline int wil_rx_status_get_security(void *msg) { return WIL_GET_BITS(((struct wil_rx_status_compressed *)msg)->d0, |