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be2net: gather debug info and reset adapter (only for Lancer) on a tx-timeout

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This patch handles a TX-timeout as follows:

1) This patch gathers and prints the following info that can
   help in diagnosing the cause of a TX-timeout.
   a) TX queue and completion queue entries.
   b) SKB and TCP/UDP header details.

2) For Lancer NICs (TX-timeout recovery is not supported for
   BE3/Skyhawk-R NICs), it recovers from the TX timeout as follows:

   a) On a TX-timeout, driver sets the PHYSDEV_CONTROL_FW_RESET_MASK
      bit in the PHYSDEV_CONTROL register. Lancer firmware goes into
      an error state and indicates this back to the driver via a bit
      in a doorbell register.
   b) Driver detects this and calls be_err_recover(). DMA is disabled,
      all pending TX skbs are unmapped and freed (be_close()). All rings
      are destroyed (be_clear()).
   c) The driver waits for the FW to re-initialize and re-creates all
      rings along with other data structs (be_resume())

Signed-off-by: Suresh Reddy <suresh.reddy@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Suresh Reddy 2018-07-31 11:39:42 -04:00 committed by David S. Miller
parent 96d395020e
commit c1b3bdb2ff
1 changed files with 79 additions and 1 deletions
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80
drivers/net/ethernet/emulex/benet/be_main.c
View File

@ -1412,6 +1412,83 @@ drop:
return NETDEV_TX_OK;
}
static void be_tx_timeout(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct device *dev = &adapter->pdev->dev;
struct be_tx_obj *txo;
struct sk_buff *skb;
struct tcphdr *tcphdr;
struct udphdr *udphdr;
u32 *entry;
int status;
int i, j;
for_all_tx_queues(adapter, txo, i) {
dev_info(dev, "TXQ Dump: %d H: %d T: %d used: %d, qid: 0x%x\n",
i, txo->q.head, txo->q.tail,
atomic_read(&txo->q.used), txo->q.id);
entry = txo->q.dma_mem.va;
for (j = 0; j < TX_Q_LEN * 4; j += 4) {
if (entry[j] != 0 || entry[j + 1] != 0 ||
entry[j + 2] != 0 || entry[j + 3] != 0) {
dev_info(dev, "Entry %d 0x%x 0x%x 0x%x 0x%x\n",
j, entry[j], entry[j + 1],
entry[j + 2], entry[j + 3]);
}
}
entry = txo->cq.dma_mem.va;
dev_info(dev, "TXCQ Dump: %d H: %d T: %d used: %d\n",
i, txo->cq.head, txo->cq.tail,
atomic_read(&txo->cq.used));
for (j = 0; j < TX_CQ_LEN * 4; j += 4) {
if (entry[j] != 0 || entry[j + 1] != 0 ||
entry[j + 2] != 0 || entry[j + 3] != 0) {
dev_info(dev, "Entry %d 0x%x 0x%x 0x%x 0x%x\n",
j, entry[j], entry[j + 1],
entry[j + 2], entry[j + 3]);
}
}
for (j = 0; j < TX_Q_LEN; j++) {
if (txo->sent_skb_list[j]) {
skb = txo->sent_skb_list[j];
if (ip_hdr(skb)->protocol == IPPROTO_TCP) {
tcphdr = tcp_hdr(skb);
dev_info(dev, "TCP source port %d\n",
ntohs(tcphdr->source));
dev_info(dev, "TCP dest port %d\n",
ntohs(tcphdr->dest));
dev_info(dev, "TCP seqence num %d\n",
ntohs(tcphdr->seq));
dev_info(dev, "TCP ack_seq %d\n",
ntohs(tcphdr->ack_seq));
} else if (ip_hdr(skb)->protocol ==
IPPROTO_UDP) {
udphdr = udp_hdr(skb);
dev_info(dev, "UDP source port %d\n",
ntohs(udphdr->source));
dev_info(dev, "UDP dest port %d\n",
ntohs(udphdr->dest));
}
dev_info(dev, "skb[%d] %p len %d proto 0x%x\n",
j, skb, skb->len, skb->protocol);
}
}
}
if (lancer_chip(adapter)) {
dev_info(dev, "Initiating reset due to tx timeout\n");
dev_info(dev, "Resetting adapter\n");
status = lancer_physdev_ctrl(adapter,
PHYSDEV_CONTROL_FW_RESET_MASK);
if (status)
dev_err(dev, "Reset failed .. Reboot server\n");
}
}
static inline bool be_in_all_promisc(struct be_adapter *adapter)
{
return (adapter->if_flags & BE_IF_FLAGS_ALL_PROMISCUOUS) ==
@ -3274,7 +3351,7 @@ void be_detect_error(struct be_adapter *adapter)
/* Do not log error messages if its a FW reset */
if (sliport_err1 == SLIPORT_ERROR_FW_RESET1 &&
sliport_err2 == SLIPORT_ERROR_FW_RESET2) {
dev_info(dev, "Firmware update in progress\n");
dev_info(dev, "Reset is in progress\n");
} else {
dev_err(dev, "Error detected in the card\n");
dev_err(dev, "ERR: sliport status 0x%x\n",
@ -5218,6 +5295,7 @@ static const struct net_device_ops be_netdev_ops = {
.ndo_get_vf_config = be_get_vf_config,
.ndo_set_vf_link_state = be_set_vf_link_state,
.ndo_set_vf_spoofchk = be_set_vf_spoofchk,
.ndo_tx_timeout = be_tx_timeout,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = be_netpoll,
#endif