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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 14:31:10 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 14:31:10 -0800 |
commit | b2fe5fa68642860e7de76167c3111623aa0d5de1 (patch) | |
tree | b7f9b89b7039ecefbc35fe3c8e73a6ff972641dd /drivers/net/ethernet/amazon/ena/ena_netdev.c | |
parent | a103950e0dd2058df5e8a8d4a915707bdcf205f0 (diff) | |
parent | a54667f6728c2714a400f3c884727da74b6d1717 (diff) | |
download | op-kernel-dev-b2fe5fa68642860e7de76167c3111623aa0d5de1.zip op-kernel-dev-b2fe5fa68642860e7de76167c3111623aa0d5de1.tar.gz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
1) Significantly shrink the core networking routing structures. Result
of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf
2) Add netdevsim driver for testing various offloads, from Jakub
Kicinski.
3) Support cross-chip FDB operations in DSA, from Vivien Didelot.
4) Add a 2nd listener hash table for TCP, similar to what was done for
UDP. From Martin KaFai Lau.
5) Add eBPF based queue selection to tun, from Jason Wang.
6) Lockless qdisc support, from John Fastabend.
7) SCTP stream interleave support, from Xin Long.
8) Smoother TCP receive autotuning, from Eric Dumazet.
9) Lots of erspan tunneling enhancements, from William Tu.
10) Add true function call support to BPF, from Alexei Starovoitov.
11) Add explicit support for GRO HW offloading, from Michael Chan.
12) Support extack generation in more netlink subsystems. From Alexander
Aring, Quentin Monnet, and Jakub Kicinski.
13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
Russell King.
14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.
15) Many improvements and simplifications to the NFP driver bpf JIT,
from Jakub Kicinski.
16) Support for ipv6 non-equal cost multipath routing, from Ido
Schimmel.
17) Add resource abstration to devlink, from Arkadi Sharshevsky.
18) Packet scheduler classifier shared filter block support, from Jiri
Pirko.
19) Avoid locking in act_csum, from Davide Caratti.
20) devinet_ioctl() simplifications from Al viro.
21) More TCP bpf improvements from Lawrence Brakmo.
22) Add support for onlink ipv6 route flag, similar to ipv4, from David
Ahern.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
tls: Add support for encryption using async offload accelerator
ip6mr: fix stale iterator
net/sched: kconfig: Remove blank help texts
openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
tcp_nv: fix potential integer overflow in tcpnv_acked
r8169: fix RTL8168EP take too long to complete driver initialization.
qmi_wwan: Add support for Quectel EP06
rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
ipmr: Fix ptrdiff_t print formatting
ibmvnic: Wait for device response when changing MAC
qlcnic: fix deadlock bug
tcp: release sk_frag.page in tcp_disconnect
ipv4: Get the address of interface correctly.
net_sched: gen_estimator: fix lockdep splat
net: macb: Handle HRESP error
net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
ipv6: addrconf: break critical section in addrconf_verify_rtnl()
ipv6: change route cache aging logic
i40e/i40evf: Update DESC_NEEDED value to reflect larger value
bnxt_en: cleanup DIM work on device shutdown
...
Diffstat (limited to 'drivers/net/ethernet/amazon/ena/ena_netdev.c')
-rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_netdev.c | 68 |
1 files changed, 61 insertions, 7 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index fbe21a8..6975150 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -161,6 +161,8 @@ static void ena_init_io_rings_common(struct ena_adapter *adapter, ring->per_napi_packets = 0; ring->per_napi_bytes = 0; ring->cpu = 0; + ring->first_interrupt = false; + ring->no_interrupt_event_cnt = 0; u64_stats_init(&ring->syncp); } @@ -1277,6 +1279,9 @@ static irqreturn_t ena_intr_msix_io(int irq, void *data) { struct ena_napi *ena_napi = data; + ena_napi->tx_ring->first_interrupt = true; + ena_napi->rx_ring->first_interrupt = true; + napi_schedule_irqoff(&ena_napi->napi); return IRQ_HANDLED; @@ -2663,8 +2668,32 @@ static void ena_fw_reset_device(struct work_struct *work) rtnl_unlock(); } -static int check_missing_comp_in_queue(struct ena_adapter *adapter, - struct ena_ring *tx_ring) +static int check_for_rx_interrupt_queue(struct ena_adapter *adapter, + struct ena_ring *rx_ring) +{ + if (likely(rx_ring->first_interrupt)) + return 0; + + if (ena_com_cq_empty(rx_ring->ena_com_io_cq)) + return 0; + + rx_ring->no_interrupt_event_cnt++; + + if (rx_ring->no_interrupt_event_cnt == ENA_MAX_NO_INTERRUPT_ITERATIONS) { + netif_err(adapter, rx_err, adapter->netdev, + "Potential MSIX issue on Rx side Queue = %d. Reset the device\n", + rx_ring->qid); + adapter->reset_reason = ENA_REGS_RESET_MISS_INTERRUPT; + smp_mb__before_atomic(); + set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags); + return -EIO; + } + + return 0; +} + +static int check_missing_comp_in_tx_queue(struct ena_adapter *adapter, + struct ena_ring *tx_ring) { struct ena_tx_buffer *tx_buf; unsigned long last_jiffies; @@ -2674,8 +2703,27 @@ static int check_missing_comp_in_queue(struct ena_adapter *adapter, for (i = 0; i < tx_ring->ring_size; i++) { tx_buf = &tx_ring->tx_buffer_info[i]; last_jiffies = tx_buf->last_jiffies; - if (unlikely(last_jiffies && - time_is_before_jiffies(last_jiffies + adapter->missing_tx_completion_to))) { + + if (last_jiffies == 0) + /* no pending Tx at this location */ + continue; + + if (unlikely(!tx_ring->first_interrupt && time_is_before_jiffies(last_jiffies + + 2 * adapter->missing_tx_completion_to))) { + /* If after graceful period interrupt is still not + * received, we schedule a reset + */ + netif_err(adapter, tx_err, adapter->netdev, + "Potential MSIX issue on Tx side Queue = %d. Reset the device\n", + tx_ring->qid); + adapter->reset_reason = ENA_REGS_RESET_MISS_INTERRUPT; + smp_mb__before_atomic(); + set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags); + return -EIO; + } + + if (unlikely(time_is_before_jiffies(last_jiffies + + adapter->missing_tx_completion_to))) { if (!tx_buf->print_once) netif_notice(adapter, tx_err, adapter->netdev, "Found a Tx that wasn't completed on time, qid %d, index %d.\n", @@ -2704,9 +2752,10 @@ static int check_missing_comp_in_queue(struct ena_adapter *adapter, return rc; } -static void check_for_missing_tx_completions(struct ena_adapter *adapter) +static void check_for_missing_completions(struct ena_adapter *adapter) { struct ena_ring *tx_ring; + struct ena_ring *rx_ring; int i, budget, rc; /* Make sure the driver doesn't turn the device in other process */ @@ -2725,8 +2774,13 @@ static void check_for_missing_tx_completions(struct ena_adapter *adapter) for (i = adapter->last_monitored_tx_qid; i < adapter->num_queues; i++) { tx_ring = &adapter->tx_ring[i]; + rx_ring = &adapter->rx_ring[i]; + + rc = check_missing_comp_in_tx_queue(adapter, tx_ring); + if (unlikely(rc)) + return; - rc = check_missing_comp_in_queue(adapter, tx_ring); + rc = check_for_rx_interrupt_queue(adapter, rx_ring); if (unlikely(rc)) return; @@ -2885,7 +2939,7 @@ static void ena_timer_service(struct timer_list *t) check_for_admin_com_state(adapter); - check_for_missing_tx_completions(adapter); + check_for_missing_completions(adapter); check_for_empty_rx_ring(adapter); |