Return-path: Received: from alexa-out-ams-01.qualcomm.com ([185.23.61.162]:42741 "EHLO alexa-out-ams-01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388390AbeGXIt4 (ORCPT ); Tue, 24 Jul 2018 04:49:56 -0400 From: Maya Erez To: Kalle Valo Cc: Dedy Lansky , linux-wireless@vger.kernel.org, wil6210@qti.qualcomm.com, Maya Erez Subject: [PATCH v2 02/19] wil6210: drop Rx packets with L2 error indication from HW Date: Tue, 24 Jul 2018 10:44:23 +0300 Message-Id: <1532418280-5849-3-git-send-email-merez@codeaurora.org> (sfid-20180724_100226_905549_BDE2A4B7) In-Reply-To: <1532418280-5849-1-git-send-email-merez@codeaurora.org> References: <1532418280-5849-1-git-send-email-merez@codeaurora.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Dedy Lansky Due to recent change in FW, driver will be notified of corrupted Rx packets (e.g. MIC error). Drop such packets before they are delivered to network stack. Signed-off-by: Dedy Lansky Signed-off-by: Maya Erez --- drivers/net/wireless/ath/wil6210/debugfs.c | 12 ++++---- drivers/net/wireless/ath/wil6210/txrx.c | 22 ++++++++++++++ drivers/net/wireless/ath/wil6210/txrx_edma.c | 16 ++++------ drivers/net/wireless/ath/wil6210/wil6210.h | 44 +++++++++++++++------------- 4 files changed, 55 insertions(+), 39 deletions(-) diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index 7d62126..99b1fc5 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -1734,13 +1734,11 @@ static int wil_sta_debugfs_show(struct seq_file *s, void *data) p->stats.rx_short_frame, p->stats.rx_large_frame, p->stats.rx_replay); - - if (wil->use_enhanced_dma_hw) - seq_printf(s, - "mic error %lu, key error %lu, amsdu error %lu\n", - p->stats.rx_mic_error, - p->stats.rx_key_error, - p->stats.rx_amsdu_error); + seq_printf(s, + "mic error %lu, key error %lu, amsdu error %lu\n", + p->stats.rx_mic_error, + p->stats.rx_key_error, + p->stats.rx_amsdu_error); seq_puts(s, "Rx/MCS:"); for (mcs = 0; mcs < ARRAY_SIZE(p->stats.rx_per_mcs); diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c index ad40a96..9ac8674 100644 --- a/drivers/net/wireless/ath/wil6210/txrx.c +++ b/drivers/net/wireless/ath/wil6210/txrx.c @@ -678,6 +678,21 @@ static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) return 0; } +static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, + struct wil_net_stats *stats) +{ + struct vring_rx_desc *d = wil_skb_rxdesc(skb); + + if ((d->dma.status & RX_DMA_STATUS_ERROR) && + (d->dma.error & RX_DMA_ERROR_MIC)) { + stats->rx_mic_error++; + wil_dbg_txrx(wil, "MIC error, dropping packet\n"); + return -EFAULT; + } + + return 0; +} + static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, int *security) { @@ -736,6 +751,12 @@ void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) goto stats; } + /* check errors reported by HW and update statistics */ + if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { + dev_kfree_skb(skb); + return; + } + if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { if (mcast) { /* send multicast frames both to higher layers in @@ -2212,6 +2233,7 @@ void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) wil->txrx_ops.get_netif_rx_params = wil_get_netif_rx_params; wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; + wil->txrx_ops.rx_error_check = wil_rx_error_check; wil->txrx_ops.is_rx_idle = wil_is_rx_idle; wil->txrx_ops.rx_fini = wil_rx_fini; } diff --git a/drivers/net/wireless/ath/wil6210/txrx_edma.c b/drivers/net/wireless/ath/wil6210/txrx_edma.c index 1940347..b5d399f 100644 --- a/drivers/net/wireless/ath/wil6210/txrx_edma.c +++ b/drivers/net/wireless/ath/wil6210/txrx_edma.c @@ -795,14 +795,15 @@ static int wil_check_bar(struct wil6210_priv *wil, void *msg, int cid, return -EAGAIN; } -static int wil_rx_edma_check_errors(struct wil6210_priv *wil, void *msg, - struct wil_net_stats *stats, - struct sk_buff *skb) +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) { @@ -865,7 +866,6 @@ static struct sk_buff *wil_sring_reap_rx_edma(struct wil6210_priv *wil, struct wil_net_stats *stats = NULL; u16 dmalen; int cid; - int rc; bool eop, headstolen; int delta; u8 dr_bit; @@ -937,13 +937,6 @@ static struct sk_buff *wil_sring_reap_rx_edma(struct wil6210_priv *wil, goto skipping; } - /* Check and treat errors reported by HW */ - rc = wil_rx_edma_check_errors(wil, msg, stats, skb); - if (rc) { - rxdata->skipping = true; - goto skipping; - } - if (unlikely(dmalen > sz)) { wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); stats->rx_large_frame++; @@ -1593,6 +1586,7 @@ void wil_init_txrx_ops_edma(struct wil6210_priv *wil) wil->txrx_ops.get_reorder_params = wil_get_reorder_params_edma; wil->txrx_ops.get_netif_rx_params = wil_get_netif_rx_params_edma; wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check_edma; + wil->txrx_ops.rx_error_check = wil_rx_error_check_edma; wil->txrx_ops.is_rx_idle = wil_is_rx_idle_edma; wil->txrx_ops.rx_fini = wil_rx_fini_edma; } diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h index 9b1467c..002d336 100644 --- a/drivers/net/wireless/ath/wil6210/wil6210.h +++ b/drivers/net/wireless/ath/wil6210/wil6210.h @@ -543,6 +543,27 @@ struct wil_status_ring { struct wil_ring_rx_data rx_data; }; +#define WIL_STA_TID_NUM (16) +#define WIL_MCS_MAX (12) /* Maximum MCS supported */ + +struct wil_net_stats { + unsigned long rx_packets; + unsigned long tx_packets; + unsigned long rx_bytes; + unsigned long tx_bytes; + unsigned long tx_errors; + unsigned long rx_dropped; + unsigned long rx_non_data_frame; + unsigned long rx_short_frame; + unsigned long rx_large_frame; + unsigned long rx_replay; + unsigned long rx_mic_error; + unsigned long rx_key_error; /* eDMA specific */ + unsigned long rx_amsdu_error; /* eDMA specific */ + u16 last_mcs_rx; + u64 rx_per_mcs[WIL_MCS_MAX + 1]; +}; + /** * struct tx_rx_ops - different TX/RX ops for legacy and enhanced * DMA flow @@ -576,6 +597,8 @@ struct wil_txrx_ops { void (*get_netif_rx_params)(struct sk_buff *skb, int *cid, int *security); int (*rx_crypto_check)(struct wil6210_priv *wil, struct sk_buff *skb); + int (*rx_error_check)(struct wil6210_priv *wil, struct sk_buff *skb, + struct wil_net_stats *stats); bool (*is_rx_idle)(struct wil6210_priv *wil); irqreturn_t (*irq_rx)(int irq, void *cookie); }; @@ -676,27 +699,6 @@ enum wil_sta_status { wil_sta_connected = 2, }; -#define WIL_STA_TID_NUM (16) -#define WIL_MCS_MAX (12) /* Maximum MCS supported */ - -struct wil_net_stats { - unsigned long rx_packets; - unsigned long tx_packets; - unsigned long rx_bytes; - unsigned long tx_bytes; - unsigned long tx_errors; - unsigned long rx_dropped; - unsigned long rx_non_data_frame; - unsigned long rx_short_frame; - unsigned long rx_large_frame; - unsigned long rx_replay; - unsigned long rx_mic_error; /* eDMA specific */ - unsigned long rx_key_error; /* eDMA specific */ - unsigned long rx_amsdu_error; /* eDMA specific */ - u16 last_mcs_rx; - u64 rx_per_mcs[WIL_MCS_MAX + 1]; -}; - /** * struct wil_sta_info - data for peer * -- 1.9.1