From 387116b89e987521653b7e9b70a13a9dc1ea6a85 Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Wed, 28 Nov 2012 11:42:35 +0200 Subject: wlcore: improve handling for Rx errors Treat Rx error code as a bitmask. This allows sending MIC failures when other error bit are on. Align Rx descriptor status mask to the FW definition. Ease debugging in case FW reports failure to decrypt on packets. Discard corrupted packets early in Rx path to avoid reporting other abnormalities with corrupted packets that also have other failure bytes on. Namely - we don't want to get a MIC failure on a corrupted packet. This is mandated by the WiFi specification - see section 11.4.2.4.1 in 802.11-2012. Signed-off-by: Eyal Shapira Signed-off-by: Arik Nemtsov Signed-off-by: Luciano Coelho --- drivers/net/wireless/ti/wlcore/rx.c | 29 ++++++++++++++--------------- drivers/net/wireless/ti/wlcore/rx.h | 3 +-- 2 files changed, 15 insertions(+), 17 deletions(-) (limited to 'drivers/net/wireless/ti') diff --git a/drivers/net/wireless/ti/wlcore/rx.c b/drivers/net/wireless/ti/wlcore/rx.c index 4665b9615dc9..6791a1a6afba 100644 --- a/drivers/net/wireless/ti/wlcore/rx.c +++ b/drivers/net/wireless/ti/wlcore/rx.c @@ -92,9 +92,10 @@ static void wl1271_rx_status(struct wl1271 *wl, status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED | RX_FLAG_DECRYPTED; - if (unlikely(desc_err_code == WL1271_RX_DESC_MIC_FAIL)) { + if (unlikely(desc_err_code & WL1271_RX_DESC_MIC_FAIL)) { status->flag |= RX_FLAG_MMIC_ERROR; - wl1271_warning("Michael MIC error"); + wl1271_warning("Michael MIC error. Desc: 0x%x", + desc_err_code); } } @@ -112,7 +113,7 @@ static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length, u8 *buf; u8 beacon = 0; u8 is_data = 0; - u8 reserved = 0; + u8 reserved = 0, offset_to_data = 0; u16 seq_num; u32 pkt_data_len; @@ -132,6 +133,8 @@ static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length, if (rx_align == WLCORE_RX_BUF_UNALIGNED) reserved = RX_BUF_ALIGN; + else if (rx_align == WLCORE_RX_BUF_PADDED) + offset_to_data = RX_BUF_ALIGN; /* the data read starts with the descriptor */ desc = (struct wl1271_rx_descriptor *) data; @@ -143,19 +146,15 @@ static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length, return 0; } - switch (desc->status & WL1271_RX_DESC_STATUS_MASK) { /* discard corrupted packets */ - case WL1271_RX_DESC_DRIVER_RX_Q_FAIL: - case WL1271_RX_DESC_DECRYPT_FAIL: - wl1271_warning("corrupted packet in RX with status: 0x%x", - desc->status & WL1271_RX_DESC_STATUS_MASK); - return -EINVAL; - case WL1271_RX_DESC_SUCCESS: - case WL1271_RX_DESC_MIC_FAIL: - break; - default: - wl1271_error("invalid RX descriptor status: 0x%x", - desc->status & WL1271_RX_DESC_STATUS_MASK); + if (desc->status & WL1271_RX_DESC_DECRYPT_FAIL) { + hdr = (void *)(data + sizeof(*desc) + offset_to_data); + wl1271_warning("corrupted packet in RX: status: 0x%x len: %d", + desc->status & WL1271_RX_DESC_STATUS_MASK, + pkt_data_len); + wl1271_dump((DEBUG_RX|DEBUG_CMD), "PKT: ", data + sizeof(*desc), + min(pkt_data_len, + ieee80211_hdrlen(hdr->frame_control))); return -EINVAL; } diff --git a/drivers/net/wireless/ti/wlcore/rx.h b/drivers/net/wireless/ti/wlcore/rx.h index 71eba1899915..3363f60fb7da 100644 --- a/drivers/net/wireless/ti/wlcore/rx.h +++ b/drivers/net/wireless/ti/wlcore/rx.h @@ -84,12 +84,11 @@ * Bits 3-5 - process_id tag (AP mode FW) * Bits 6-7 - reserved */ -#define WL1271_RX_DESC_STATUS_MASK 0x03 +#define WL1271_RX_DESC_STATUS_MASK 0x07 #define WL1271_RX_DESC_SUCCESS 0x00 #define WL1271_RX_DESC_DECRYPT_FAIL 0x01 #define WL1271_RX_DESC_MIC_FAIL 0x02 -#define WL1271_RX_DESC_DRIVER_RX_Q_FAIL 0x03 #define RX_MEM_BLOCK_MASK 0xFF #define RX_BUF_SIZE_MASK 0xFFF00 -- cgit v1.2.1