# Copyright (c) 2017 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.
*** Settings ***
| Resource | resources/libraries/robot/performance/performance_setup.robot
| ...
| Force Tags | 3_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | NDRPDRDISC
| ... | NIC_Intel-X520-DA2 | ETH | IP6FWD | FEATURE | IACLDST
| ...
| Suite Setup | Set up 3-node performance topology with DUT's NIC model
| ... | L3 | Intel-X520-DA2
| Suite Teardown | Tear down 3-node performance topology
| ...
| Test Setup | Set up performance test
| ...
| Test Teardown | Tear down performance discovery test | ${min_rate}pps
| ... | ${framesize} | ${traffic_profile}
| ...
| Documentation | *RFC2544: Pkt throughput IPv6 iAcl whitelist test cases*
| ...
| ... | *[Top] Network Topologies:* TG-DUT1-DUT2-TG 3-node circular topology
| ... | with single links between nodes.
| ... | *[Enc] Packet Encapsulations:* Eth-IPv6 for IPv6 routing.
| ... | *[Cfg] DUT configuration:* DUT1 and DUT2 are configured with IPv6
| ... | routing, two static IPv6 /64 routes and IPv6 iAcl security whitelist
| ... | ingress /64 filter entries applied on links TG - DUT1 and DUT2 - TG.
| ... | DUT1 and DUT2 tested with 2p10GE NIC X520 Niantic by Intel.
| ... | *[Ver] TG verification:* TG finds and reports throughput NDR (Non Drop
| ... | Rate) with zero packet loss tolerance or throughput PDR (Partial Drop
| ... | Rate) with non-zero packet loss tolerance (LT) expressed in percentage
| ... | of packets transmitted. NDR and PDR are discovered for different
| ... | Ethernet L2 frame sizes using either binary search or linear search
| ... | algorithms with configured starting rate and final step that determines
| ... | throughput measurement resolution. Test packets are generated by TG on
| ... | links to DUTs. TG traffic profile contains two L3 flow-groups
| ... | (flow-group per direction, 253 flows per flow-group) with all packets
| ... | containing Ethernet header, IPv6 header and generated payload. MAC
| ... | addresses are matching MAC addresses of the TG node interfaces.
| ... | *[Ref] Applicable standard specifications:* RFC2544.
*** Variables ***
# X520-DA2 bandwidth limit
| ${s_limit} | ${10000000000}
# Traffic profile:
| ${traffic_profile} | trex-sl-3n-ethip6-ip6src253
*** Test Cases ***
| tc01-78B-1t1c-ethip6-ip6base-iacldstbase-ndrdisc
| | [Documentation]
| | ... | [Cfg] DUT runs IPv6 routing and whitelist filters config with \
| | ... | 1 thread, 1 phy core, 1 receive queue per NIC port. [Ver] Find NDR
| | ... | for 78 Byte frames using binary search start at 10GE linerate,
| | ... | step 100kpps.
| | [Tags] | 78B | 1T1C | STHREAD | NDRDISC
| | ${framesize}= | Set Variable | ${78}
| | ${min_rate}= | Set Variable | ${100000}
| | ${max_rate}= | Calculate pps | ${s_limit} | ${framesize}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to DUTs in 3-node single link topology
| | And Add no multi seg to all DUTs
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/*
*------------------------------------------------------------------
* Copyright (c) 2016 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vnet/vnet.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/gso/gro_func.h>
#include <vnet/gso/hdr_offset_parser.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/tcp/tcp_packet.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/devices/virtio/virtio.h>
#define foreach_virtio_tx_func_error \
_(NO_FREE_SLOTS, "no free tx slots") \
_(TRUNC_PACKET, "packet > buffer size -- truncated in tx ring") \
_(PENDING_MSGS, "pending msgs in tx ring") \
_(INDIRECT_DESC_ALLOC_FAILED, "indirect descriptor allocation failed - packet drop") \
_(OUT_OF_ORDER, "out-of-order buffers in used ring") \
_(GSO_PACKET_DROP, "gso disabled on itf -- gso packet drop") \
_(CSUM_OFFLOAD_PACKET_DROP, "checksum offload disabled on itf -- csum offload packet drop")
typedef enum
{
#define _(f,s) VIRTIO_TX_ERROR_##f,
foreach_virtio_tx_func_error
#undef _
VIRTIO_TX_N_ERROR,
} virtio_tx_func_error_t;
static char *virtio_tx_func_error_strings[] = {
#define _(n,s) s,
foreach_virtio_tx_func_error
#undef _
};
static u8 *
format_virtio_device (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
int verbose = va_arg (*args, int);
u32 indent = format_get_indent (s);
s = format (s, "VIRTIO interface");
if (verbose)
{
s = format (s, "\n%U instance %u", format_white_space, indent + 2,
dev_instance);
}
return s;
}
typedef struct
{
u32 buffer_index;
u32 sw_if_index;
generic_header_offset_t gho;
vlib_buffer_t buffer;
} virtio_tx_trace_t;
static u8 *
format_virtio_tx_trace (u8 * s, va_list * va)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
virtio_tx_trace_t *t = va_arg (*va, virtio_tx_trace_t *);
u32 indent = format_get_indent (s);
s = format (s, "%Ubuffer 0x%x: %U\n",
format_white_space, indent,
t->buffer_index, format_vnet_buffer, &t->buffer);
s =
format (s, "%U%U\n", format_white_space, indent,
format_generic_header_offset, &t->gho);
s =
format (s, "%U%U", format_white_space, indent,
format_ethernet_header_with_length, t->buffer.pre_data,
sizeof (t->buffer.pre_data));
return s;
}
static_always_inline void
virtio_tx_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_buffer_t * b0, u32 bi, int is_tun)
{
virtio_tx_trace_t *t;
t = vlib_add_trace (vm, node, b0, sizeof (t[0]));
t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
t->buffer_index = bi;
if (is_tun)
{
int is_ip4 = 0, is_ip6 = 0;
switch (((u8 *) vlib_buffer_get_current (b0))[0] & 0xf0)
{
case 0x40:
is_ip4 = 1;
break;
case 0x60:
is_ip6 = 1;
break;
default:
break;
}
vnet_generic_header_offset_parser (b0, &t->gho, 0, is_ip4, is_ip6);
}
else
vnet_generic_header_offset_parser (b0, &t->gho, 1,
b0->flags &
VNET_BUFFER_F_IS_IP4,
b0->flags & VNET_BUFFER_F_IS_IP6);
clib_memcpy_fast (&t->buffer, b0, sizeof (*b0) - sizeof (b0->pre_data));
clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0),
sizeof (t->buffer.pre_data));
}
static_always_inline void
virtio_interface_drop_inline (vlib_main_t * vm, uword node_index,
u32 * buffers, u16 n,
virtio_tx_func_error_t error)
{
vlib_error_count (vm, node_index, error, n);
vlib_buffer_free (vm, buffers, n);
}
static_always_inline void
virtio_memset_ring_u32 (u32 * ring, u32 start, u32 ring_size, u32 n_buffers)
{
ASSERT (n_buffers <= ring_size);
if (PREDICT_TRUE (start + n_buffers <= ring_size))
{
clib_memset_u32 (ring + start, ~0, n_buffers);
}
else
{
clib_memset_u32 (ring + start, ~0, ring_size - start);
clib_memset_u32 (ring, ~0, n_buffers - (ring_size - start));
}
}
static_always_inline void
virtio_free_used_device_desc_split (vlib_main_t * vm, virtio_vring_t * vring,
uword node_index)
{
u16 used = vring->desc_in_use;
u16 sz = vring->size;
u16 mask = sz - 1;
u16 last = vring->last_used_idx;
u16 n_left = vring->used->idx - last;
u16 out_of_order_count = 0;
if (n_left == 0)
return;
while (n_left)
{
vring_used_elem_t *e = &vring->used->ring[last & mask];
u16 slot, n_buffers;
slot = n_buffers = e->id;
while (e->id == (n_buffers & mask))
{
n_left--;
last++;
n_buffers++;
vring_desc_t *d = &vring->desc[e->id];
u16 next;
while (d->flags & VRING_DESC_F_NEXT)
{
n_buffers++;
next = d->next;
d = &vring->desc[next];
}
if (n_left == 0)
break;
e = &vring->used->ring[last & mask];
}
vlib_buffer_free_from_ring (vm, vring->buffers, slot,
sz, (n_buffers - slot));
virtio_memset_ring_u32 (vring->buffers, slot, sz, (n_buffers - slot));
used -= (n_buffers - slot);
if (n_left > 0)
{
vlib_buffer_free (vm, &vring->buffers[e->id], 1);
vring->buffers[e->id] = ~0;
used--;
last++;
n_left--;
out_of_order_count++;
vring->flags |= VRING_TX_OUT_OF_ORDER;
}
}
/*
* Some vhost-backends give buffers back in out-of-order fashion in used ring.
* It impacts the overall virtio-performance.
*/
if (out_of_order_count)
vlib_error_count (vm, node_index, VIRTIO_TX_ERROR_OUT_OF_ORDER,
out_of_order_count);
vring->desc_in_use = used;
vring->last_used_idx = last;
}
static_always_inline void
virtio_free_used_device_desc_packed (vlib_main_t * vm, virtio_vring_t * vring,
uword node_index)
{
vring_packed_desc_t *d;
u16 sz = vring->size;
u16 last = vring->last_used_idx;
u16 n_buffers = 0, start;
u16 flags;
if (vring->desc_in_use == 0)
return;
d = &vring->packed_desc[last];
flags = d->flags;
start = d->id;
while ((flags & VRING_DESC_F_AVAIL) == (vring->used_wrap_counter << 7) &&
(flags & VRING_DESC_F_USED) == (vring->used_wrap_counter << 15))
{
last++;
n_buffers++;
if (last >= sz)
{
last = 0;
vring->used_wrap_counter ^= 1;
}
d = &vring->packed_desc[last];
flags = d->flags;
}
if (n_buffers)
{
vlib_buffer_free_from_ring (vm, vring->buffers, start, sz, n_buffers);
virtio_memset_ring_u32 (vring->buffers, start, sz, n_buffers);
vring->desc_in_use -= n_buffers;
vring->last_used_idx = last;
}
}
static_always_inline void
virtio_free_used_device_desc (vlib_main_t * vm, virtio_vring_t * vring,
uword node_index, int packed)
{
if (packed)
virtio_free_used_device_desc_packed (vm, vring, node_index);
else
virtio_free_used_device_desc_split (vm, vring, node_index);
}
static_always_inline void
set_checksum_offsets (vlib_buffer_t * b, virtio_net_hdr_v1_t * hdr,
const int is_l2)
{
if (b->flags & VNET_BUFFER_F_IS_IP4)
{
ip4_header_t *ip4;
generic_header_offset_t gho = { 0 };
vnet_generic_header_offset_parser (b, &gho, is_l2, 1 /* ip4 */ ,
0 /* ip6 */ );
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = gho.l4_hdr_offset; // 0x22;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{
hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
}
/*
* virtio devices do not support IP4 checksum offload. So driver takes care
* of it while doing tx.
*/
ip4 =
(ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset);
if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
ip4->checksum = ip4_header_checksum (ip4);
}
else if (b->flags & VNET_BUFFER_F_IS_IP6)
{
generic_header_offset_t gho = { 0 };
vnet_generic_header_offset_parser (b, &gho, is_l2, 0 /* ip4 */ ,
1 /* ip6 */ );
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = gho.l4_hdr_offset; // 0x36;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{
hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
}
}
}
static_always_inline void
set_gso_offsets (vlib_buffer_t * b, virtio_net_hdr_v1_t * hdr,
const int is_l2)
{
if (b->flags & VNET_BUFFER_F_IS_IP4)
{
ip4_header_t *ip4;
generic_header_offset_t gho = { 0 };
vnet_generic_header_offset_parser (b, &gho, is_l2, 1 /* ip4 */ ,
0 /* ip6 */ );
hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
hdr->gso_size = vnet_buffer2 (b)->gso_size;
hdr->hdr_len = gho.hdr_sz;
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = gho.l4_hdr_offset; // 0x22;
hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
ip4 =
(ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset);
/*
* virtio devices do not support IP4 checksum offload. So driver takes care
* of it while doing tx.
*/
if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
ip4->checksum = ip4_header_checksum (ip4);
}
else if (b->flags & VNET_BUFFER_F_IS_IP6)
{
generic_header_offset_t gho = { 0 };
vnet_generic_header_offset_parser (b, &gho, is_l2, 0 /* ip4 */ ,
1 /* ip6 */ );
hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
hdr->gso_size = vnet_buffer2 (b)->gso_size;
hdr->hdr_len = gho.hdr_sz;
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = gho.l4_hdr_offset; // 0x36;
hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
}
}
static_always_inline u16
add_buffer_to_slot (vlib_main_t * vm, vlib_node_runtime_t * node,
virtio_vring_t * vring, u32 bi, u16 free_desc_count,
u16 avail, u16 next, u16 mask, int hdr_sz, int do_gso,
int csum_offload, int is_pci, int is_tun, int is_indirect,
int is_any_layout)
{
u16 n_added = 0;
vring_desc_t *d;
int is_l2 = !is_tun;
d = &vring->desc[next];
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
u32 drop_inline = ~0;
clib_memset_u8 (hdr, 0, hdr_sz);
if (b->flags & VNET_BUFFER_F_GSO)
{
if (do_gso)
set_gso_offsets (b, hdr, is_l2);
else
{
drop_inline = VIRTIO_TX_ERROR_GSO_PACKET_DROP;
goto done;
}
}
else if (b->flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
{
if (csum_offload)
set_checksum_offsets (b, hdr, is_l2);
else
{
drop_inline = VIRTIO_TX_ERROR_CSUM_OFFLOAD_PACKET_DROP;
goto done;
}
}
if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
{
virtio_tx_trace (vm, node, b, bi, is_tun);
}
if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0))
{
d->addr = ((is_pci) ? vlib_buffer_get_current_pa (vm, b) :
pointer_to_uword (vlib_buffer_get_current (b))) - hdr_sz;
d->len = b->current_length + hdr_sz;
d->flags = 0;
}
else if (is_indirect)
{
/*
* We are using single vlib_buffer_t for indirect descriptor(s)
* chain. Single descriptor is 16 bytes and vlib_buffer_t
* has 2048 bytes space. So maximum long chain can have 128
* (=2048/16) indirect descriptors.
* It can easily support 65535 bytes of Jumbo frames with
* each data buffer size of 512 bytes minimum.
*/
u32 indirect_buffer = 0;
if (PREDICT_FALSE (vlib_buffer_alloc (vm, &indirect_buffer, 1) == 0))
{
drop_inline = VIRTIO_TX_ERROR_INDIRECT_DESC_ALLOC_FAILED;
goto done;
}
vlib_buffer_t *indirect_desc = vlib_get_buffer (vm, indirect_buffer);
indirect_desc->current_data = 0;
indirect_desc->flags |= VLIB_BUFFER_NEXT_PRESENT;
indirect_desc->next_buffer = bi;
bi = indirect_buffer;
vring_desc_t *id =
(vring_desc_t *) vlib_buffer_get_current (indirect_desc);
u32 count = 1;
if (is_pci)
{
d->addr = vlib_physmem_get_pa (vm, id);
id->addr = vlib_buffer_get_current_pa (vm, b) - hdr_sz;
/*
* If VIRTIO_F_ANY_LAYOUT is not negotiated, then virtio_net_hdr
* should be presented in separate descriptor and data will start
* from next descriptor.
*/
if (is_any_layout)
id->len = b->current_length + hdr_sz;
else
{
id->len = hdr_sz;
id->flags = VRING_DESC_F_NEXT;
id->next = count;
count++;
id++;
id->addr = vlib_buffer_get_current_pa (vm, b);
id->len = b->current_length;
}
while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
{
id->flags = VRING_DESC_F_NEXT;
id->next = count;
count++;
id++;
b = vlib_get_buffer (vm, b->next_buffer);
id->addr = vlib_buffer_get_current_pa (vm, b);
id->len = b->current_length;
}
}
else /* VIRTIO_IF_TYPE_[TAP | TUN] */
{
d->addr = pointer_to_uword (id);
/* first buffer in chain */
id->addr = pointer_to_uword (vlib_buffer_get_current (b)) - hdr_sz;
id->len = b->current_length + hdr_sz;
while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
{
id->flags = VRING_DESC_F_NEXT;
id->next = count;
count++;
id++;
b = vlib_get_buffer (vm, b->next_buffer);
id->addr = pointer_to_uword (vlib_buffer_get_current (b));
id->len = b->current_length;
}
}
id->flags = 0;
id->next = 0;
d->len = count * sizeof (vring_desc_t);
d->flags = VRING_DESC_F_INDIRECT;
}
else if (is_pci)
{
u16 count = next;
vlib_buffer_t *b_temp = b;
u16 n_buffers_in_chain = 1;
/*
* Check the length of the chain for the required number of
* descriptors. Return from here, retry to get more descriptors,
* if chain length is greater than available descriptors.
*/
while (b_temp->flags & VLIB_BUFFER_NEXT_PRESENT)
{
n_buffers_in_chain++;
b_temp = vlib_get_buffer (vm, b_temp->next_buffer);
}
if (n_buffers_in_chain > free_desc_count)
return n_buffers_in_chain;
d->addr = vlib_buffer_get_current_pa (vm, b) - hdr_sz;
d->len = b->current_length + hdr_sz;
while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
{
d->flags = VRING_DESC_F_NEXT;
vring->buffers[count] = bi;
b->flags &=
~(VLIB_BUFFER_NEXT_PRESENT | VLIB_BUFFER_TOTAL_LENGTH_VALID);
bi = b->next_buffer;
b->next_buffer = 0;
n_added++;
count = (count + 1) & mask;
d->next = count;
d = &vring->desc[count];
b = vlib_get_buffer (vm, bi);
d->addr = vlib_buffer_get_current_pa (vm, b);
d->len = b->current_length;
}
d->flags = 0;
vring->buffers[count] = bi;
vring->avail->ring[avail & mask] = next;
n_added++;
return n_added;
}
else
{
ASSERT (0);
}
vring->buffers[next] = bi;
vring->avail->ring[avail & mask] = next;
n_added++;
done:
if (drop_inline != ~0)
virtio_interface_drop_inline (vm, node->node_index, &bi, 1, drop_inline);
return n_added;
}
static_always_inline u16
add_buffer_to_slot_packed (vlib_main_t * vm, vlib_node_runtime_t * node,
virtio_vring_t * vring, u32 bi, u16 next,
int hdr_sz, int do_gso, int csum_offload,
int is_pci, int is_tun, int is_indirect,
int is_any_layout)
{
u16 n_added = 0, flags = 0;
int is_l2 = !is_tun;
vring_packed_desc_t *d = &vring->packed_desc[next];
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
u32 drop_inline = ~0;
clib_memset (hdr, 0, hdr_sz);
if (b->flags & VNET_BUFFER_F_GSO)
{
if (do_gso)
set_gso_offsets (b, hdr, is_l2);
else
{
drop_inline = VIRTIO_TX_ERROR_GSO_PACKET_DROP;
goto done;
}
}
else if (b->flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
{
if (csum_offload)
set_checksum_offsets (b, hdr, is_l2);
else
{
drop_inline = VIRTIO_TX_ERROR_CSUM_OFFLOAD_PACKET_DROP;
goto done;
}
}
if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
{
virtio_tx_trace (vm, node, b, bi, is_tun);
}
if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0))
{
d->addr =
((is_pci) ? vlib_buffer_get_current_pa (vm,
b) :
pointer_to_uword (vlib_buffer_get_current (b))) - hdr_sz;
d->len = b->current_length + hdr_sz;
}
else if (is_indirect)
{
/*
* We are using single vlib_buffer_t for indirect descriptor(s)
* chain. Single descriptor is 16 bytes and vlib_buffer_t
* has 2048 bytes space. So maximum long chain can have 128
* (=2048/16) indirect descriptors.
* It can easily support 65535 bytes of Jumbo frames with
* each data buffer size of 512 bytes minimum.
*/
u32 indirect_buffer = 0;
if (PREDICT_FALSE (vlib_buffer_alloc (vm, &indirect_buffer, 1) == 0))
{
drop_inline = VIRTIO_TX_ERROR_INDIRECT_DESC_ALLOC_FAILED;
goto done;
}
vlib_buffer_t *indirect_desc = vlib_get_buffer (vm, indirect_buffer);
indirect_desc->current_data = 0;
indirect_desc->flags |= VLIB_BUFFER_NEXT_PRESENT;
indirect_desc->next_buffer = bi;
bi = indirect_buffer;
vring_packed_desc_t *id =
(vring_packed_desc_t *) vlib_buffer_get_current (indirect_desc);
u32 count = 1;
if (is_pci)
{
d->addr = vlib_physmem_get_pa (vm, id);
id->addr = vlib_buffer_get_current_pa (vm, b) - hdr_sz;
/*
* If VIRTIO_F_ANY_LAYOUT is not negotiated, then virtio_net_hdr
* should be presented in separate descriptor and data will start
* from next descriptor.
*/
if (is_any_layout)
id->len = b->current_length + hdr_sz;
else
{
id->len = hdr_sz;
id->flags = 0;
id->id = 0;
count++;
id++;
id->addr = vlib_buffer_get_current_pa (vm, b);
id->len = b->current_length;
}
while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
{
id->flags = 0;
id->id = 0;
count++;
id++;
b = vlib_get_buffer (vm, b->next_buffer);
id->addr = vlib_buffer_get_current_pa (vm, b);
id->len = b->current_length;
}
}
id->flags = 0;
id->id = 0;
d->len = count * sizeof (vring_packed_desc_t);
flags = VRING_DESC_F_INDIRECT;
}
else
{
ASSERT (0);
}
if (vring->avail_wrap_counter)
{
flags |= VRING_DESC_F_AVAIL;
flags &= ~VRING_DESC_F_USED;
}
else
{
flags &= ~VRING_DESC_F_AVAIL;
flags |= VRING_DESC_F_USED;
}
d->id = next;
d->flags = flags;
vring->buffers[next] = bi;
n_added++;
done:
if (drop_inline != ~0)
virtio_interface_drop_inline (vm, node->node_index, &bi, 1, drop_inline);
return n_added;
}
static_always_inline uword
virtio_interface_tx_packed_gso_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
virtio_if_t * vif,
virtio_if_type_t type,
virtio_vring_t * vring,
u32 * buffers, u16 n_left,
const int do_gso,
const int csum_offload)
{
int is_pci = (type == VIRTIO_IF_TYPE_PCI);
int is_tun = (type == VIRTIO_IF_TYPE_TUN);
int is_indirect =
((vif->features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) != 0);
int is_any_layout =
((vif->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) != 0);
const int hdr_sz = vif->virtio_net_hdr_sz;
u16 sz = vring->size;
u16 used, next, n_buffers = 0, n_buffers_left = 0;
u16 n_vectors = n_left;
used = vring->desc_in_use;
next = vring->desc_next;
if (vif->packet_buffering)
{
n_buffers = n_buffers_left = virtio_vring_n_buffers (vring->buffering);
while (n_buffers_left && used < sz)
{
u16 n_added = 0;
u32 bi = virtio_vring_buffering_read_from_front (vring->buffering);
if (bi == ~0)
break;
n_added = add_buffer_to_slot_packed (vm, node,
vring, bi, next,
hdr_sz, do_gso, csum_offload,
is_pci, is_tun, is_indirect,
is_any_layout);
n_buffers_left--;
if (PREDICT_FALSE (n_added == 0))
continue;
used++;
next++;
if (next >= sz)
{
next = 0;
vring->avail_wrap_counter ^= 1;
}
}
}
while (n_left && used < sz)
{
u16 n_added = 0;
n_added = add_buffer_to_slot_packed (vm, node,
vring, buffers[0], next,
hdr_sz, do_gso, csum_offload,
is_pci, is_tun, is_indirect,
is_any_layout);
buffers++;
n_left--;
if (PREDICT_FALSE (n_added == 0))
continue;
used++;
next++;
if (next >= sz)
{
next = 0;
vring->avail_wrap_counter ^= 1;
}
}
if (n_left != n_vectors || n_buffers != n_buffers_left)
{
CLIB_MEMORY_STORE_BARRIER ();
vring->desc_next = next;
vring->desc_in_use = used;
CLIB_MEMORY_BARRIER ();
if (vring->device_event->flags != VRING_EVENT_F_DISABLE)
virtio_kick (vm, vring, vif);
}
return n_left;
}
static_always_inline void
virtio_find_free_desc (virtio_vring_t * vring, u16 size, u16 mask,
u16 req, u16 next, u32 * first_free_desc_index,
u16 * free_desc_count)
{
u16 start = 0;
/* next is used as hint: from where to start looking */
for (u16 i = 0; i < size; i++, next++)
{
if (vring->buffers[next & mask] == ~0)
{
if (*first_free_desc_index == ~0)
{
*first_free_desc_index = (next & mask);
start = i;
(*free_desc_count)++;
req--;
if (req == 0)
break;
}
else
{
if (start + *free_desc_count == i)
{
(*free_desc_count)++;
req--;
if (req == 0)
break;
}
else
break;
}
}
}
}
static_always_inline u16
virtio_interface_tx_split_gso_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
virtio_if_t * vif,
virtio_if_type_t type,
virtio_vring_t * vring, u32 * buffers,
u16 n_left, int do_gso,
int csum_offload)
{
u16 used, next, avail, n_buffers = 0, n_buffers_left = 0;
int is_pci = (type == VIRTIO_IF_TYPE_PCI);
int is_tun = (type == VIRTIO_IF_TYPE_TUN);
int is_indirect =
((vif->features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) != 0);
int is_any_layout =
((vif->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) != 0);
u16 sz = vring->size;
int hdr_sz = vif->virtio_net_hdr_sz;
u16 mask = sz - 1;
u16 n_vectors = n_left;
used = vring->desc_in_use;
next = vring->desc_next;
avail = vring->avail->idx;
u16 free_desc_count = 0;
if (PREDICT_FALSE (vring->flags & VRING_TX_OUT_OF_ORDER))
{
u32 first_free_desc_index = ~0;
virtio_find_free_desc (vring, sz, mask, n_left, next,
&first_free_desc_index, &free_desc_count);
if (free_desc_count)
next = first_free_desc_index;
}
else
free_desc_count = sz - used;
if (vif->packet_buffering)
{
n_buffers = n_buffers_left = virtio_vring_n_buffers (vring->buffering);
while (n_buffers_left && free_desc_count)
{
u16 n_added = 0;
u32 bi = virtio_vring_buffering_read_from_front (vring->buffering);
if (bi == ~0)
break;
n_added = add_buffer_to_slot (vm, node, vring, bi, free_desc_count,
avail, next, mask, hdr_sz, do_gso,
csum_offload, is_pci, is_tun,
is_indirect, is_any_layout);
if (PREDICT_FALSE (n_added == 0))
{
n_buffers_left--;
continue;
}
else if (PREDICT_FALSE (n_added > free_desc_count))
break;
avail++;
next = (next + n_added) & mask;
used += n_added;
n_buffers_left--;
free_desc_count -= n_added;
}
}
while (n_left && free_desc_count)
{
u16 n_added = 0;
n_added = add_buffer_to_slot (vm, node, vring, buffers[0],
free_desc_count, avail, next, mask,
hdr_sz, do_gso, csum_offload, is_pci,
is_tun, is_indirect, is_any_layout);
if (PREDICT_FALSE (n_added == 0))
{
buffers++;
n_left--;
continue;
}
else if (PREDICT_FALSE (n_added > free_desc_count))
break;
avail++;
next = (next + n_added) & mask;
used += n_added;
buffers++;
n_left--;
free_desc_count -= n_added;
}
if (n_left != n_vectors || n_buffers != n_buffers_left)
{
CLIB_MEMORY_STORE_BARRIER ();
vring->avail->idx = avail;
vring->desc_next = next;
vring->desc_in_use = used;
if ((vring->used->flags & VRING_USED_F_NO_NOTIFY) == 0)
virtio_kick (vm, vring, vif);
}
return n_left;
}
static_always_inline u16
virtio_interface_tx_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
virtio_if_t * vif,
virtio_if_type_t type, virtio_vring_t * vring,
u32 * buffers, u16 n_left, int packed,
int do_gso, int csum_offload)
{
if (packed)
return virtio_interface_tx_packed_gso_inline (vm, node, vif, type, vring,
buffers, n_left,
do_gso, csum_offload);
else
return virtio_interface_tx_split_gso_inline (vm, node, vif, type, vring,
buffers, n_left,
do_gso, csum_offload);
}
static_always_inline u16
virtio_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
virtio_if_t * vif,
virtio_vring_t * vring, virtio_if_type_t type,
u32 * buffers, u16 n_left, int packed)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
buffers, n_left, packed,
1 /* do_gso */ ,
1 /* checksum offload */ );
else if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
buffers, n_left, packed,
0 /* no do_gso */ ,
1 /* checksum offload */ );
else
return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
buffers, n_left, packed,
0 /* no do_gso */ ,
0 /* no checksum offload */ );
}
VNET_DEVICE_CLASS_TX_FN (virtio_device_class) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
virtio_main_t *nm = &virtio_main;
vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
virtio_if_t *vif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
u16 qid = vm->thread_index % vif->num_txqs;
virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, qid);
u16 n_left = frame->n_vectors;
u32 *buffers = vlib_frame_vector_args (frame);
u32 to[GRO_TO_VECTOR_SIZE (n_left)];
int packed = vif->is_packed;
clib_spinlock_lock_if_init (&vring->lockp);
if (packed && (vring->device_event->flags != VRING_EVENT_F_DISABLE))
virtio_kick (vm, vring, vif);
else if ((vring->used->flags & VRING_USED_F_NO_NOTIFY) == 0 &&
(vring->last_kick_avail_idx != vring->avail->idx))
virtio_kick (vm, vring, vif);
if (vif->packet_coalesce)
{
n_left = vnet_gro_inline (vm, vring->flow_table, buffers, n_left, to);
buffers = to;
}
u16 retry_count = 2;
retry:
/* free consumed buffers */
virtio_free_used_device_desc (vm, vring, node->node_index, packed);
if (vif->type == VIRTIO_IF_TYPE_TAP)
n_left = virtio_interface_tx_inline (vm, node, vif, vring,
VIRTIO_IF_TYPE_TAP,
&buffers[frame->n_vectors - n_left],
n_left, packed);
else if (vif->type == VIRTIO_IF_TYPE_PCI)
n_left = virtio_interface_tx_inline (vm, node, vif, vring,
VIRTIO_IF_TYPE_PCI,
&buffers[frame->n_vectors - n_left],
n_left, packed);
else if (vif->type == VIRTIO_IF_TYPE_TUN)
n_left = virtio_interface_tx_inline (vm, node, vif, vring,
VIRTIO_IF_TYPE_TUN,
&buffers[frame->n_vectors - n_left],
n_left, packed);
else
ASSERT (0);
if (n_left && retry_count--)
goto retry;
if (vif->packet_buffering && n_left)
{
u16 n_buffered = virtio_vring_buffering_store_packets (vring->buffering,
&buffers
[frame->n_vectors
- n_left],
n_left);
n_left -= n_buffered;
}
if (n_left)
virtio_interface_drop_inline (vm, node->node_index,
&buffers[frame->n_vectors - n_left], n_left,
VIRTIO_TX_ERROR_NO_FREE_SLOTS);
clib_spinlock_unlock_if_init (&vring->lockp);
return frame->n_vectors - n_left;
}
static void
virtio_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
u32 node_index)
{
virtio_main_t *apm = &virtio_main;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
virtio_if_t *vif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
/* Shut off redirection */
if (node_index == ~0)
{
vif->per_interface_next_index = node_index;
return;
}
vif->per_interface_next_index =
vlib_node_add_next (vlib_get_main (), virtio_input_node.index,
node_index);
}
static void
virtio_clear_hw_interface_counters (u32 instance)
{
/* Nothing for now */
}
static_always_inline void
virtio_set_rx_interrupt (virtio_if_t * vif, virtio_vring_t * vring)
{
if (vif->is_packed)
vring->driver_event->flags &= ~VRING_EVENT_F_DISABLE;
else
vring->avail->flags &= ~VRING_AVAIL_F_NO_INTERRUPT;
}
static_always_inline void
virtio_set_rx_polling (virtio_if_t * vif, virtio_vring_t * vring)
{
if (vif->is_packed)
vring->driver_event->flags |= VRING_EVENT_F_DISABLE;
else
vring->avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
}
static clib_error_t *
virtio_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
vnet_hw_if_rx_mode mode)
{
vlib_main_t *vm = vnm->vlib_main;
virtio_main_t *mm = &virtio_main;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
virtio_vring_t *rx_vring = vec_elt_at_index (vif->rxq_vrings, qid);
if (vif->type == VIRTIO_IF_TYPE_PCI && !(vif->support_int_mode))
{
virtio_set_rx_polling (vif, rx_vring);
return clib_error_return (0, "interrupt mode is not supported");
}
if (mode == VNET_HW_IF_RX_MODE_POLLING)
{
if (vif->packet_coalesce || vif->packet_buffering)
{
if (mm->interrupt_queues_count > 0)
mm->interrupt_queues_count--;
if (mm->interrupt_queues_count == 0)
vlib_process_signal_event (vm,
virtio_send_interrupt_node.index,
VIRTIO_EVENT_STOP_TIMER, 0);
}
virtio_set_rx_polling (vif, rx_vring);
}
else
{
if (vif->packet_coalesce || vif->packet_buffering)
{
mm->interrupt_queues_count++;
if (mm->interrupt_queues_count == 1)
vlib_process_signal_event (vm,
virtio_send_interrupt_node.index,
VIRTIO_EVENT_START_TIMER, 0);
}
virtio_set_rx_interrupt (vif, rx_vring);
}
rx_vring->mode = mode;
return 0;
}
static clib_error_t *
virtio_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
{
virtio_main_t *mm = &virtio_main;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
{
vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
VNET_HW_INTERFACE_FLAG_LINK_UP);
}
else
{
vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
}
return 0;
}
static clib_error_t *
virtio_subif_add_del_function (vnet_main_t * vnm,
u32 hw_if_index,
struct vnet_sw_interface_t *st, int is_add)
{
/* Nothing for now */
return 0;
}
/* *INDENT-OFF* */
VNET_DEVICE_CLASS (virtio_device_class) = {
.name = "virtio",
.format_device_name = format_virtio_device_name,
.format_device = format_virtio_device,
.format_tx_trace = format_virtio_tx_trace,
.tx_function_n_errors = VIRTIO_TX_N_ERROR,
.tx_function_error_strings = virtio_tx_func_error_strings,
.rx_redirect_to_node = virtio_set_interface_next_node,
.clear_counters = virtio_clear_hw_interface_counters,
.admin_up_down_function = virtio_interface_admin_up_down,
.subif_add_del_function = virtio_subif_add_del_function,
.rx_mode_change_function = virtio_interface_rx_mode_change,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
