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net/wan/fsl_ucc_hdlc: error counters
Extract error information from rx and tx buffer descriptors, and update error counters. Signed-off-by: Mathias Thore <mathias.thore@infinera.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
2af1ccd581
commit
ba59d57058
2 changed files with 51 additions and 8 deletions
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@ -36,6 +36,7 @@
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#define DRV_NAME "ucc_hdlc"
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#define TDM_PPPOHT_SLIC_MAXIN
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#define RX_BD_ERRORS (R_CD_S | R_OV_S | R_CR_S | R_AB_S | R_NO_S | R_LG_S)
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static struct ucc_tdm_info utdm_primary_info = {
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.uf_info = {
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@ -430,12 +431,25 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
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return NETDEV_TX_OK;
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}
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static int hdlc_tx_restart(struct ucc_hdlc_private *priv)
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{
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u32 cecr_subblock;
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cecr_subblock =
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ucc_fast_get_qe_cr_subblock(priv->ut_info->uf_info.ucc_num);
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qe_issue_cmd(QE_RESTART_TX, cecr_subblock,
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QE_CR_PROTOCOL_UNSPECIFIED, 0);
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return 0;
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}
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static int hdlc_tx_done(struct ucc_hdlc_private *priv)
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{
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/* Start from the next BD that should be filled */
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struct net_device *dev = priv->ndev;
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struct qe_bd *bd; /* BD pointer */
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u16 bd_status;
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int tx_restart = 0;
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bd = priv->dirty_tx;
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bd_status = ioread16be(&bd->status);
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@ -444,6 +458,15 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
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while ((bd_status & T_R_S) == 0) {
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struct sk_buff *skb;
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if (bd_status & T_UN_S) { /* Underrun */
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dev->stats.tx_fifo_errors++;
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tx_restart = 1;
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}
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if (bd_status & T_CT_S) { /* Carrier lost */
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dev->stats.tx_carrier_errors++;
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tx_restart = 1;
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}
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/* BD contains already transmitted buffer. */
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/* Handle the transmitted buffer and release */
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/* the BD to be used with the current frame */
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@ -475,6 +498,9 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
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}
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priv->dirty_tx = bd;
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if (tx_restart)
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hdlc_tx_restart(priv);
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return 0;
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}
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@ -493,11 +519,22 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
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/* while there are received buffers and BD is full (~R_E) */
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while (!((bd_status & (R_E_S)) || (--rx_work_limit < 0))) {
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if (bd_status & R_OV_S)
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dev->stats.rx_over_errors++;
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if (bd_status & R_CR_S) {
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dev->stats.rx_crc_errors++;
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dev->stats.rx_dropped++;
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if (bd_status & (RX_BD_ERRORS)) {
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dev->stats.rx_errors++;
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if (bd_status & R_CD_S)
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dev->stats.collisions++;
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if (bd_status & R_OV_S)
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dev->stats.rx_fifo_errors++;
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if (bd_status & R_CR_S)
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dev->stats.rx_crc_errors++;
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if (bd_status & R_AB_S)
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dev->stats.rx_over_errors++;
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if (bd_status & R_NO_S)
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dev->stats.rx_frame_errors++;
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if (bd_status & R_LG_S)
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dev->stats.rx_length_errors++;
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goto recycle;
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}
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bdbuffer = priv->rx_buffer +
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@ -546,7 +583,7 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
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netif_receive_skb(skb);
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recycle:
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iowrite16be(bd_status | R_E_S | R_I_S, &bd->status);
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iowrite16be((bd_status & R_W_S) | R_E_S | R_I_S, &bd->status);
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/* update to point at the next bd */
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if (bd_status & R_W_S) {
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@ -622,7 +659,7 @@ static irqreturn_t ucc_hdlc_irq_handler(int irq, void *dev_id)
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/* Errors and other events */
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if (ucce >> 16 & UCC_HDLC_UCCE_BSY)
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dev->stats.rx_errors++;
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dev->stats.rx_missed_errors++;
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if (ucce >> 16 & UCC_HDLC_UCCE_TXE)
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dev->stats.tx_errors++;
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@ -41,8 +41,12 @@
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#define R_L_S 0x0800 /* last */
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#define R_F_S 0x0400 /* first */
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#define R_CM_S 0x0200 /* continuous mode */
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#define R_LG_S 0x0020 /* frame length */
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#define R_NO_S 0x0010 /* nonoctet */
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#define R_AB_S 0x0008 /* abort */
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#define R_CR_S 0x0004 /* crc */
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#define R_OV_S 0x0002 /* crc */
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#define R_OV_S 0x0002 /* overrun */
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#define R_CD_S 0x0001 /* carrier detect */
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/* transmit BD's status */
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#define T_R_S 0x8000 /* ready bit */
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@ -51,6 +55,8 @@
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#define T_L_S 0x0800 /* last */
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#define T_TC_S 0x0400 /* crc */
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#define T_TM_S 0x0200 /* continuous mode */
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#define T_UN_S 0x0002 /* hdlc underrun */
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#define T_CT_S 0x0001 /* hdlc carrier lost */
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/* Rx Data buffer must be 4 bytes aligned in most cases */
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#define UCC_FAST_RX_ALIGN 4
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