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wil6210: drop Rx packets with L2 error indication from HW

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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 <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Dedy Lansky 2018-07-24 10:44:23 +03:00 committed by Kalle Valo
parent 1bd82ee09a
commit e15af41c05
4 changed files with 55 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/wireless/ath/wil6210/debugfs.c
View File

@ -1734,13 +1734,11 @@ __acquires(&p->tid_rx_lock) __releases(&p->tid_rx_lock)
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);

22
drivers/net/wireless/ath/wil6210/txrx.c
View File

@ -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;
}

16
drivers/net/wireless/ath/wil6210/txrx_edma.c
View File

@ -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;
}

44
drivers/net/wireless/ath/wil6210/wil6210.h
View File

@ -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
*