blob: f182409ac593a106f8ab4af2e511d9c733ed5099 [file] [log] [blame]
/*
*------------------------------------------------------------------
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlib/pci/pci.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/devices/devices.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/udp/udp_packet.h>
#include <vmxnet3/vmxnet3.h>
#define foreach_vmxnet3_input_error \
_(BUFFER_ALLOC, "buffer alloc error") \
_(RX_PACKET_NO_SOP, "Rx packet error - no SOP") \
_(RX_PACKET, "Rx packet error") \
_(RX_PACKET_EOP, "Rx packet error found on EOP") \
_(NO_BUFFER, "Rx no buffer error")
typedef enum
{
#define _(f,s) VMXNET3_INPUT_ERROR_##f,
foreach_vmxnet3_input_error
#undef _
VMXNET3_INPUT_N_ERROR,
} vmxnet3_input_error_t;
static __clib_unused char *vmxnet3_input_error_strings[] = {
#define _(n,s) s,
foreach_vmxnet3_input_error
#undef _
};
static_always_inline u16
vmxnet3_find_rid (vmxnet3_device_t * vd, vmxnet3_rx_comp * rx_comp)
{
u32 rid;
// rid is bits 16-25 (10 bits number)
rid = rx_comp->index & (0xffffffff >> 6);
rid >>= 16;
if ((rid >= vd->num_rx_queues) && (rid < (vd->num_rx_queues << 1)))
return 1;
else
return 0;
}
static_always_inline void
vmxnet3_rx_comp_ring_advance_next (vmxnet3_rxq_t * rxq)
{
vmxnet3_rx_comp_ring *comp_ring = &rxq->rx_comp_ring;
comp_ring->next++;
if (PREDICT_FALSE (comp_ring->next == rxq->size))
{
comp_ring->next = 0;
comp_ring->gen ^= VMXNET3_RXCF_GEN;
}
}
static_always_inline void
vmxnet3_handle_offload (vmxnet3_rx_comp * rx_comp, vlib_buffer_t * hb,
u16 gso_size)
{
u8 l4_hdr_sz = 0;
if (rx_comp->flags & VMXNET3_RXCF_IP4)
{
ip4_header_t *ip4 = (ip4_header_t *) (hb->data +
sizeof (ethernet_header_t));
vnet_buffer (hb)->l2_hdr_offset = 0;
vnet_buffer (hb)->l3_hdr_offset = sizeof (ethernet_header_t);
vnet_buffer (hb)->l4_hdr_offset = sizeof (ethernet_header_t) +
ip4_header_bytes (ip4);
hb->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
VNET_BUFFER_F_L4_HDR_OFFSET_VALID | VNET_BUFFER_F_IS_IP4;
/* checksum offload */
if (!(rx_comp->index & VMXNET3_RXCI_CNC))
{
if (!(rx_comp->flags & VMXNET3_RXCF_IPC))
{
hb->flags |= VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
ip4->checksum = 0;
}
if (!(rx_comp->flags & VMXNET3_RXCF_TUC))
{
if (rx_comp->flags & VMXNET3_RXCF_TCP)
{
tcp_header_t *tcp =
(tcp_header_t *) (hb->data +
vnet_buffer (hb)->l4_hdr_offset);
hb->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
tcp->checksum = 0;
}
else if (rx_comp->flags & VMXNET3_RXCF_UDP)
{
udp_header_t *udp =
(udp_header_t *) (hb->data +
vnet_buffer (hb)->l4_hdr_offset);
hb->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
udp->checksum = 0;
}
}
}
if (gso_size)
{
if (rx_comp->flags & VMXNET3_RXCF_TCP)
{
tcp_header_t *tcp =
(tcp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
l4_hdr_sz = tcp_header_bytes (tcp);
}
else if (rx_comp->flags & VMXNET3_RXCF_UDP)
{
udp_header_t *udp =
(udp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
l4_hdr_sz = sizeof (*udp);
}
vnet_buffer2 (hb)->gso_size = gso_size;
vnet_buffer2 (hb)->gso_l4_hdr_sz = l4_hdr_sz;
hb->flags |= VNET_BUFFER_F_GSO;
}
}
else if (rx_comp->flags & VMXNET3_RXCF_IP6)
{
vnet_buffer (hb)->l2_hdr_offset = 0;
vnet_buffer (hb)->l3_hdr_offset = sizeof (ethernet_header_t);
vnet_buffer (hb)->l4_hdr_offset = sizeof (ethernet_header_t) +
sizeof (ip6_header_t);
hb->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
VNET_BUFFER_F_L4_HDR_OFFSET_VALID | VNET_BUFFER_F_IS_IP6;
/* checksum offload */
if (!(rx_comp->index & VMXNET3_RXCI_CNC))
{
if (!(rx_comp->flags & VMXNET3_RXCF_TUC))
{
if (rx_comp->flags & VMXNET3_RXCF_TCP)
{
tcp_header_t *tcp =
(tcp_header_t *) (hb->data +
vnet_buffer (hb)->l4_hdr_offset);
hb->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
tcp->checksum = 0;
}
else if (rx_comp->flags & VMXNET3_RXCF_UDP)
{
udp_header_t *udp =
(udp_header_t *) (hb->data +
vnet_buffer (hb)->l4_hdr_offset);
hb->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
udp->checksum = 0;
}
}
}
if (gso_size)
{
if (rx_comp->flags & VMXNET3_RXCF_TCP)
{
tcp_header_t *tcp =
(tcp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
l4_hdr_sz = tcp_header_bytes (tcp);
}
else if (rx_comp->flags & VMXNET3_RXCF_UDP)
{
udp_header_t *udp =
(udp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
l4_hdr_sz = sizeof (*udp);
}
vnet_buffer2 (hb)->gso_size = gso_size;
vnet_buffer2 (hb)->gso_l4_hdr_sz = l4_hdr_sz;
hb->flags |= VNET_BUFFER_F_GSO;
}
}
}
static_always_inline uword
vmxnet3_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, vmxnet3_device_t * vd,
u16 qid)
{
vnet_main_t *vnm = vnet_get_main ();
uword n_trace = vlib_get_trace_count (vm, node);
u32 n_rx_packets = 0, n_rx_bytes = 0;
vmxnet3_rx_comp *rx_comp;
u32 desc_idx;
vmxnet3_rxq_t *rxq;
u32 thread_index = vm->thread_index;
u32 buffer_indices[VLIB_FRAME_SIZE], *bi;
u16 nexts[VLIB_FRAME_SIZE], *next;
vmxnet3_rx_ring *ring;
vmxnet3_rx_comp_ring *comp_ring;
u16 rid;
vlib_buffer_t *prev_b0 = 0, *hb = 0;
u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
u8 known_next = 0, got_packet = 0;
vmxnet3_rx_desc *rxd;
clib_error_t *error;
u16 gso_size = 0;
rxq = vec_elt_at_index (vd->rxqs, qid);
comp_ring = &rxq->rx_comp_ring;
bi = buffer_indices;
next = nexts;
rx_comp = &rxq->rx_comp[comp_ring->next];
while (PREDICT_TRUE ((n_rx_packets < VLIB_FRAME_SIZE) &&
(comp_ring->gen ==
(rx_comp->flags & VMXNET3_RXCF_GEN))))
{
vlib_buffer_t *b0;
u32 bi0;
rid = vmxnet3_find_rid (vd, rx_comp);
ring = &rxq->rx_ring[rid];
if (PREDICT_TRUE (ring->fill >= 1))
ring->fill--;
else
{
vlib_error_count (vm, node->node_index,
VMXNET3_INPUT_ERROR_NO_BUFFER, 1);
if (hb)
{
vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
hb = 0;
}
prev_b0 = 0;
break;
}
desc_idx = rx_comp->index & VMXNET3_RXC_INDEX;
ring->consume = desc_idx;
rxd = &rxq->rx_desc[rid][desc_idx];
bi0 = ring->bufs[desc_idx];
ring->bufs[desc_idx] = ~0;
b0 = vlib_get_buffer (vm, bi0);
vnet_buffer (b0)->sw_if_index[VLIB_RX] = vd->sw_if_index;
vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
vnet_buffer (b0)->feature_arc_index = 0;
b0->current_length = rx_comp->len & VMXNET3_RXCL_LEN_MASK;
b0->current_data = 0;
b0->total_length_not_including_first_buffer = 0;
b0->next_buffer = 0;
b0->flags = 0;
b0->error = 0;
b0->current_config_index = 0;
if (PREDICT_FALSE ((rx_comp->index & VMXNET3_RXCI_EOP) &&
(rx_comp->len & VMXNET3_RXCL_ERROR)))
{
vlib_buffer_free_one (vm, bi0);
vlib_error_count (vm, node->node_index,
VMXNET3_INPUT_ERROR_RX_PACKET_EOP, 1);
if (hb && vlib_get_buffer_index (vm, hb) != bi0)
{
vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
hb = 0;
}
prev_b0 = 0;
goto next;
}
if (rx_comp->index & VMXNET3_RXCI_SOP)
{
ASSERT (!(rxd->flags & VMXNET3_RXF_BTYPE));
/* start segment */
if (vd->gso_enable &&
(rx_comp->flags & VMXNET3_RXCF_CT) == VMXNET3_RXCOMP_TYPE_LRO)
{
vmxnet3_rx_comp_ext *lro = (vmxnet3_rx_comp_ext *) rx_comp;
gso_size = lro->flags & VMXNET3_RXECF_MSS_MASK;
}
hb = b0;
bi[0] = bi0;
if (!(rx_comp->index & VMXNET3_RXCI_EOP))
{
hb->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
prev_b0 = b0;
}
else
{
/*
* Both start and end of packet is set. It is a complete packet
*/
prev_b0 = 0;
got_packet = 1;
}
}
else if (rx_comp->index & VMXNET3_RXCI_EOP)
{
/* end of segment */
if (PREDICT_TRUE (prev_b0 != 0))
{
if (PREDICT_TRUE (b0->current_length != 0))
{
prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
prev_b0->next_buffer = bi0;
hb->total_length_not_including_first_buffer +=
b0->current_length;
}
else
{
vlib_buffer_free_one (vm, bi0);
}
prev_b0 = 0;
got_packet = 1;
}
else
{
/* EOP without SOP, error */
vlib_error_count (vm, node->node_index,
VMXNET3_INPUT_ERROR_RX_PACKET_NO_SOP, 1);
vlib_buffer_free_one (vm, bi0);
if (hb && vlib_get_buffer_index (vm, hb) != bi0)
{
vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
hb = 0;
}
goto next;
}
}
else if (prev_b0) // !sop && !eop
{
/* mid chain */
ASSERT (rxd->flags & VMXNET3_RXF_BTYPE);
prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
prev_b0->next_buffer = bi0;
prev_b0 = b0;
hb->total_length_not_including_first_buffer += b0->current_length;
}
else
{
vlib_error_count (vm, node->node_index,
VMXNET3_INPUT_ERROR_RX_PACKET, 1);
vlib_buffer_free_one (vm, bi0);
if (hb && vlib_get_buffer_index (vm, hb) != bi0)
{
vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
hb = 0;
}
goto next;
}
n_rx_bytes += b0->current_length;
if (got_packet)
{
if (PREDICT_FALSE (vd->per_interface_next_index != ~0))
{
next_index = vd->per_interface_next_index;
known_next = 1;
}
if (PREDICT_FALSE
(vnet_device_input_have_features (vd->sw_if_index)))
{
vnet_feature_start_device_input_x1 (vd->sw_if_index,
&next_index, hb);
known_next = 1;
}
if (PREDICT_FALSE (known_next))
next[0] = next_index;
else
{
ethernet_header_t *e = (ethernet_header_t *) hb->data;
next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
if (!ethernet_frame_is_tagged (ntohs (e->type)))
vmxnet3_handle_offload (rx_comp, hb, gso_size);
}
n_rx_packets++;
next++;
bi++;
hb = 0;
got_packet = 0;
gso_size = 0;
}
next:
vmxnet3_rx_comp_ring_advance_next (rxq);
rx_comp = &rxq->rx_comp[comp_ring->next];
}
if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
{
u32 n_left = n_rx_packets;
bi = buffer_indices;
next = nexts;
while (n_trace && n_left)
{
vlib_buffer_t *b;
vmxnet3_input_trace_t *tr;
b = vlib_get_buffer (vm, bi[0]);
vlib_trace_buffer (vm, node, next[0], b, /* follow_chain */ 0);
tr = vlib_add_trace (vm, node, b, sizeof (*tr));
tr->next_index = next[0];
tr->hw_if_index = vd->hw_if_index;
tr->buffer = *b;
n_trace--;
n_left--;
bi++;
next++;
}
vlib_set_trace_count (vm, node, n_trace);
}
if (PREDICT_TRUE (n_rx_packets))
{
vlib_buffer_enqueue_to_next (vm, node, buffer_indices, nexts,
n_rx_packets);
vlib_increment_combined_counter
(vnm->interface_main.combined_sw_if_counters +
VNET_INTERFACE_COUNTER_RX, thread_index,
vd->sw_if_index, n_rx_packets, n_rx_bytes);
}
error = vmxnet3_rxq_refill_ring0 (vm, vd, rxq);
if (PREDICT_FALSE (error != 0))
{
vlib_error_count (vm, node->node_index,
VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
}
error = vmxnet3_rxq_refill_ring1 (vm, vd, rxq);
if (PREDICT_FALSE (error != 0))
{
vlib_error_count (vm, node->node_index,
VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
}
return n_rx_packets;
}
VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
u32 n_rx = 0;
vmxnet3_main_t *vmxm = &vmxnet3_main;
vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
vnet_device_and_queue_t *dq;
foreach_device_and_queue (dq, rt->devices_and_queues)
{
vmxnet3_device_t *vd;
vd = vec_elt_at_index (vmxm->devices, dq->dev_instance);
if ((vd->flags & VMXNET3_DEVICE_F_ADMIN_UP) == 0)
continue;
n_rx += vmxnet3_device_input_inline (vm, node, frame, vd, dq->queue_id);
}
return n_rx;
}
#ifndef CLIB_MARCH_VARIANT
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (vmxnet3_input_node) = {
.name = "vmxnet3-input",
.sibling_of = "device-input",
.flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
.format_trace = format_vmxnet3_input_trace,
.type = VLIB_NODE_TYPE_INPUT,
.state = VLIB_NODE_STATE_DISABLED,
.n_errors = VMXNET3_INPUT_N_ERROR,
.error_strings = vmxnet3_input_error_strings,
};
#endif
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/