#include <vnet/devices/dpdk/dpdk.h>
#include <vnet/classify/vnet_classify.h>
#include <vnet/mpls-gre/packet.h>
+#include <vnet/handoff.h>
#include "dpdk_priv.h"
*/
#define VMWARE_LENGTH_BUG_WORKAROUND 0
-typedef struct {
- u32 cached_next_index;
-
- /* convenience variables */
- vlib_main_t * vlib_main;
- vnet_main_t * vnet_main;
-} handoff_dispatch_main_t;
-
-typedef struct {
- u32 buffer_index;
- u32 next_index;
- u32 sw_if_index;
-} handoff_dispatch_trace_t;
-
-/* packet trace format function */
-static u8 * format_handoff_dispatch_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- handoff_dispatch_trace_t * t = va_arg (*args, handoff_dispatch_trace_t *);
-
- s = format (s, "HANDOFF_DISPATCH: sw_if_index %d next_index %d buffer 0x%x",
- t->sw_if_index,
- t->next_index,
- t->buffer_index);
- return s;
-}
-
-handoff_dispatch_main_t handoff_dispatch_main;
-
-vlib_node_registration_t handoff_dispatch_node;
-
-#define foreach_handoff_dispatch_error \
-_(EXAMPLE, "example packets")
-
-typedef enum {
-#define _(sym,str) HANDOFF_DISPATCH_ERROR_##sym,
- foreach_handoff_dispatch_error
-#undef _
- HANDOFF_DISPATCH_N_ERROR,
-} handoff_dispatch_error_t;
-
-static char * handoff_dispatch_error_strings[] = {
-#define _(sym,string) string,
- foreach_handoff_dispatch_error
+static char * dpdk_error_strings[] = {
+#define _(n,s) s,
+ foreach_dpdk_error
#undef _
};
-static inline
-void vlib_put_handoff_queue_elt (vlib_frame_queue_elt_t * hf)
+always_inline int
+dpdk_mbuf_is_ip4(struct rte_mbuf *mb)
{
- CLIB_MEMORY_BARRIER();
- hf->valid = 1;
-}
-
-static uword
-handoff_dispatch_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
- dpdk_rx_next_t next_index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- next0 = vnet_buffer(b0)->io_handoff.next_index;
- next1 = vnet_buffer(b1)->io_handoff.next_index;
-
- if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
- {
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
- handoff_dispatch_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->buffer_index = bi0;
- }
- if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- vlib_trace_buffer (vm, node, next1, b1, /* follow_chain */ 0);
- handoff_dispatch_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->buffer_index = bi1;
- }
- }
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- next0 = vnet_buffer(b0)->io_handoff.next_index;
-
- if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
- {
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
- handoff_dispatch_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->buffer_index = bi0;
- }
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
+#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
+ return RTE_ETH_IS_IPV4_HDR(mb->packet_type) != 0;
+#else
+ return (mb_flags & (PKT_RX_IPV4_HDR | PKT_RX_IPV4_HDR_EXT)) != 0;
+#endif
}
-VLIB_REGISTER_NODE (handoff_dispatch_node) = {
- .function = handoff_dispatch_node_fn,
- .name = "handoff-dispatch",
- .vector_size = sizeof (u32),
- .format_trace = format_handoff_dispatch_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .flags = VLIB_NODE_FLAG_IS_HANDOFF,
-
- .n_errors = ARRAY_LEN(handoff_dispatch_error_strings),
- .error_strings = handoff_dispatch_error_strings,
-
- .n_next_nodes = DPDK_RX_N_NEXT,
-
- .next_nodes = {
- [DPDK_RX_NEXT_DROP] = "error-drop",
- [DPDK_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
- [DPDK_RX_NEXT_IP4_INPUT] = "ip4-input",
- [DPDK_RX_NEXT_IP6_INPUT] = "ip6-input",
- [DPDK_RX_NEXT_MPLS_INPUT] = "mpls-gre-input",
- },
-};
-
-clib_error_t *handoff_dispatch_init (vlib_main_t *vm)
+always_inline int
+dpdk_mbuf_is_ip6(struct rte_mbuf *mb)
{
- handoff_dispatch_main_t * mp = &handoff_dispatch_main;
-
- mp->vlib_main = vm;
- mp->vnet_main = &vnet_main;
-
- return 0;
+#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
+ return RTE_ETH_IS_IPV6_HDR(mb->packet_type) != 0;
+#else
+ return (mb_flags & (PKT_RX_IPV6_HDR | PKT_RX_IPV6_HDR_EXT)) != 0;
+#endif
}
-VLIB_INIT_FUNCTION (handoff_dispatch_init);
-
-u32 dpdk_get_handoff_node_index (void)
+always_inline int
+vlib_buffer_is_mpls(vlib_buffer_t * b)
{
- return handoff_dispatch_node.index;
+ ethernet_header_t *h = (ethernet_header_t *) b->data;
+ return (h->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST));
}
-static char * dpdk_error_strings[] = {
-#define _(n,s) s,
- foreach_dpdk_error
-#undef _
-};
-
always_inline void
dpdk_rx_next_and_error_from_mb_flags_x1 (dpdk_device_t *xd, struct rte_mbuf *mb,
vlib_buffer_t *b0,
u8 * next0, u8 * error0)
{
- u8 is0_ip4, is0_ip6, is0_mpls, n0;
+ u8 n0;
uint16_t mb_flags = mb->ol_flags;
if (PREDICT_FALSE(mb_flags & (
else
{
*error0 = DPDK_ERROR_NONE;
- if (xd->per_interface_next_index != ~0)
- n0 = xd->per_interface_next_index;
- else if (mb_flags & PKT_RX_VLAN_PKT)
+ if (PREDICT_FALSE(xd->per_interface_next_index != ~0))
+ {
+ n0 = xd->per_interface_next_index;
+ b0->flags |= BUFFER_HANDOFF_NEXT_VALID;
+ if (PREDICT_TRUE (dpdk_mbuf_is_ip4(mb)))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_IP4_INPUT;
+ else if (PREDICT_TRUE(dpdk_mbuf_is_ip6(mb)))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_IP6_INPUT;
+ else if (PREDICT_TRUE(vlib_buffer_is_mpls(b0)))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_MPLS_INPUT;
+ else
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_ETHERNET_INPUT;
+ }
+ else if (PREDICT_FALSE(xd->vlan_subifs || (mb_flags & PKT_RX_VLAN_PKT)))
n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
else
{
- n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
-#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
- is0_ip4 = RTE_ETH_IS_IPV4_HDR(mb->packet_type) != 0;
-#else
- is0_ip4 = (mb_flags & (PKT_RX_IPV4_HDR | PKT_RX_IPV4_HDR_EXT)) != 0;
-#endif
-
- if (PREDICT_TRUE(is0_ip4))
+ if (PREDICT_TRUE (dpdk_mbuf_is_ip4(mb)))
n0 = DPDK_RX_NEXT_IP4_INPUT;
+ else if (PREDICT_TRUE(dpdk_mbuf_is_ip6(mb)))
+ n0 = DPDK_RX_NEXT_IP6_INPUT;
+ else if (PREDICT_TRUE(vlib_buffer_is_mpls(b0)))
+ n0 = DPDK_RX_NEXT_MPLS_INPUT;
else
- {
-#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
- is0_ip6 = RTE_ETH_IS_IPV6_HDR(mb->packet_type) != 0;
-#else
- is0_ip6 =
- (mb_flags & (PKT_RX_IPV6_HDR | PKT_RX_IPV6_HDR_EXT)) != 0;
-#endif
- if (PREDICT_TRUE(is0_ip6))
- n0 = DPDK_RX_NEXT_IP6_INPUT;
- else
- {
- ethernet_header_t *h0 = (ethernet_header_t *) b0->data;
- is0_mpls = (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST));
- n0 = is0_mpls ? DPDK_RX_NEXT_MPLS_INPUT : n0;
- }
- }
+ n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
}
}
*next0 = n0;
n_left -= 1;
b0 = vlib_get_buffer (vm, bi0);
- mb = ((struct rte_mbuf *)b0) - 1;
+ mb = rte_mbuf_from_vlib_buffer(b0);
dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0,
&next0, &error0);
vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
t0->device_index = xd->device_index;
t0->buffer_index = bi0;
- memcpy (&t0->mb, mb, sizeof (t0->mb));
- memcpy (&t0->buffer, b0, sizeof (b0[0]) - sizeof (b0->pre_data));
- memcpy (t0->buffer.pre_data, b0->data, sizeof (t0->buffer.pre_data));
+ clib_memcpy (&t0->mb, mb, sizeof (t0->mb));
+ clib_memcpy (&t0->buffer, b0, sizeof (b0[0]) - sizeof (b0->pre_data));
+ clib_memcpy (t0->buffer.pre_data, b0->data, sizeof (t0->buffer.pre_data));
+ clib_memcpy (&t0->data, mb->buf_addr + mb->data_off, sizeof (t0->data));
#ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
/*
dpdk_device_t * xd,
vlib_node_runtime_t * node,
u32 cpu_index,
- u16 queue_id)
+ u16 queue_id,
+ int use_efd)
{
u32 n_buffers;
u32 next_index = DPDK_RX_NEXT_ETHERNET_INPUT;
u32 n_trace, trace_cnt __attribute__((unused));
vlib_buffer_free_list_t * fl;
u8 efd_discard_burst = 0;
- u16 ip_align_offset = 0;
u32 buffer_flags_template;
if (xd->admin_up == 0)
if (n_buffers == 0)
{
/* check if EFD (dpdk) is enabled */
- if (PREDICT_FALSE(dm->efd.enabled))
+ if (PREDICT_FALSE(use_efd && dm->efd.enabled))
{
/* reset a few stats */
xd->efd_agent.last_poll_time = 0;
return 0;
}
- if (xd->pmd == VNET_DPDK_PMD_THUNDERX)
- ip_align_offset = 6;
-
buffer_flags_template = dm->buffer_flags_template;
vec_reset_length (xd->d_trace_buffers);
/* Check for congestion if EFD (Early-Fast-Discard) is enabled
* in any mode (e.g. dpdk, monitor, or drop_all)
*/
- if (PREDICT_FALSE(dm->efd.enabled))
+ if (PREDICT_FALSE(use_efd && dm->efd.enabled))
{
/* update EFD counters */
dpdk_efd_update_counters(xd, n_buffers, dm->efd.enabled);
if (PREDICT_TRUE(n_buffers > 2))
{
struct rte_mbuf *pfmb = xd->rx_vectors[queue_id][mb_index+2];
- vlib_buffer_t *bp = (vlib_buffer_t *)(pfmb+1);
+ vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf(pfmb);
CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, STORE);
CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
}
ASSERT(mb);
- b0 = (vlib_buffer_t *)(mb+1);
+ b0 = vlib_buffer_from_rte_mbuf(mb);
/* check whether EFD is looking for packets to discard */
if (PREDICT_FALSE(efd_discard_burst))
{
vlib_thread_main_t * tm = vlib_get_thread_main();
-
+
if (PREDICT_TRUE(cntr_type = is_efd_discardable(tm, b0, mb)))
{
rte_pktmbuf_free(mb);
if (PREDICT_FALSE(mb->nb_segs > 1))
{
struct rte_mbuf *pfmb = mb->next;
- vlib_buffer_t *bp = (vlib_buffer_t *)(pfmb+1);
+ vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf(pfmb);
CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
b_chain = b0;
sizeof (ethernet_header_t) : 0);
b0->current_data = l3_offset0;
+ /* Some drivers like fm10k receive frames with
+ mb->data_off > RTE_PKTMBUF_HEADROOM */
+ b0->current_data += mb->data_off - RTE_PKTMBUF_HEADROOM;
b0->current_length = mb->data_len - l3_offset0;
- if (PREDICT_FALSE (ip_align_offset != 0))
- {
- if (next0 == DPDK_RX_NEXT_IP4_INPUT ||
- next0 == DPDK_RX_NEXT_IP6_INPUT)
- b0->current_data += ip_align_offset;
- }
-
b0->flags = buffer_flags_template;
if (VMWARE_LENGTH_BUG_WORKAROUND)
{
ASSERT(mb_seg != 0);
- b_seg = (vlib_buffer_t *)(mb_seg+1);
+ b_seg = vlib_buffer_from_rte_mbuf(mb_seg);
vlib_buffer_init_for_free_list (b_seg, fl);
b_seg->clone_count = 0;
return mb_index;
}
-#if VIRL > 0
-#define VIRL_SPEED_LIMIT() \
- /* Limit the input rate to 1000 vectors / sec */ \
- { \
- struct timespec ts, tsrem; \
- \
- ts.tv_sec = 0; \
- ts.tv_nsec = 1000*1000; /* 1ms */ \
- \
- while (nanosleep(&ts, &tsrem) < 0) \
- { \
- ts = tsrem; \
- } \
- }
-#else
-#define VIRL_SPEED_LIMIT()
-#endif
+static inline void poll_rate_limit(dpdk_main_t * dm)
+{
+ /* Limit the poll rate by sleeping for N msec between polls */
+ if (PREDICT_FALSE (dm->poll_sleep != 0))
+ {
+ struct timespec ts, tsrem;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1000*1000*dm->poll_sleep; /* 1ms */
+
+ while (nanosleep(&ts, &tsrem) < 0)
+ {
+ ts = tsrem;
+ }
+ }
+}
static uword
dpdk_input (vlib_main_t * vm,
{
xd = vec_elt_at_index(dm->devices, dq->device);
ASSERT(dq->queue_id == 0);
- n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, 0);
+ n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, 0, 0);
}
- VIRL_SPEED_LIMIT()
+ poll_rate_limit(dm);
return n_rx_packets;
}
vec_foreach (dq, dm->devices_by_cpu[cpu_index])
{
xd = vec_elt_at_index(dm->devices, dq->device);
- n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, dq->queue_id);
+ n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, dq->queue_id, 0);
}
- VIRL_SPEED_LIMIT()
+ poll_rate_limit(dm);
return n_rx_packets;
}
+uword
+dpdk_input_efd (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * f)
+{
+ dpdk_main_t * dm = &dpdk_main;
+ dpdk_device_t * xd;
+ uword n_rx_packets = 0;
+ dpdk_device_and_queue_t * dq;
+ u32 cpu_index = os_get_cpu_number();
+
+ /*
+ * Poll all devices on this cpu for input/interrupts.
+ */
+ vec_foreach (dq, dm->devices_by_cpu[cpu_index])
+ {
+ xd = vec_elt_at_index(dm->devices, dq->device);
+ n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, dq->queue_id, 1);
+ }
+
+ poll_rate_limit(dm);
+
+ return n_rx_packets;
+}
+
+
VLIB_REGISTER_NODE (dpdk_input_node) = {
.function = dpdk_input,
.type = VLIB_NODE_TYPE_INPUT,
},
};
+
+/* handle dpdk_input_rss alternative function */
+VLIB_NODE_FUNCTION_MULTIARCH_CLONE(dpdk_input)
+VLIB_NODE_FUNCTION_MULTIARCH_CLONE(dpdk_input_rss)
+VLIB_NODE_FUNCTION_MULTIARCH_CLONE(dpdk_input_efd)
+
+/* this macro defines dpdk_input_rss_multiarch_select() */
+CLIB_MULTIARCH_SELECT_FN(dpdk_input);
+CLIB_MULTIARCH_SELECT_FN(dpdk_input_rss);
+CLIB_MULTIARCH_SELECT_FN(dpdk_input_efd);
+
/*
* Override the next nodes for the dpdk input nodes.
* Must be invoked prior to VLIB_INIT_FUNCTION calls.
void dpdk_set_next_node (dpdk_rx_next_t next, char *name)
{
vlib_node_registration_t *r = &dpdk_input_node;
- vlib_node_registration_t *r_io = &dpdk_io_input_node;
vlib_node_registration_t *r_handoff = &handoff_dispatch_node;
switch (next)
case DPDK_RX_NEXT_MPLS_INPUT:
case DPDK_RX_NEXT_ETHERNET_INPUT:
r->next_nodes[next] = name;
- r_io->next_nodes[next] = name;
r_handoff->next_nodes[next] = name;
break;
}
}
-inline vlib_frame_queue_elt_t *
-vlib_get_handoff_queue_elt (u32 vlib_worker_index)
-{
- vlib_frame_queue_t *fq;
- vlib_frame_queue_elt_t *elt;
- u64 new_tail;
-
- fq = vlib_frame_queues[vlib_worker_index];
- ASSERT (fq);
-
- new_tail = __sync_add_and_fetch (&fq->tail, 1);
-
- /* Wait until a ring slot is available */
- while (new_tail >= fq->head_hint + fq->nelts)
- vlib_worker_thread_barrier_check ();
-
- elt = fq->elts + (new_tail & (fq->nelts-1));
-
- /* this would be very bad... */
- while (elt->valid)
- ;
-
- elt->msg_type = VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME;
- elt->last_n_vectors = elt->n_vectors = 0;
-
- return elt;
-}
-
-static inline vlib_frame_queue_elt_t *
-dpdk_get_handoff_queue_elt (
- u32 vlib_worker_index,
- vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index)
-{
- vlib_frame_queue_elt_t *elt;
-
- if (handoff_queue_elt_by_worker_index [vlib_worker_index])
- return handoff_queue_elt_by_worker_index [vlib_worker_index];
-
- elt = vlib_get_handoff_queue_elt (vlib_worker_index);
-
- handoff_queue_elt_by_worker_index [vlib_worker_index] = elt;
-
- return elt;
-}
-
-static inline vlib_frame_queue_t *
-is_vlib_handoff_queue_congested (
- u32 vlib_worker_index,
- u32 queue_hi_thresh,
- vlib_frame_queue_t ** handoff_queue_by_worker_index)
-{
- vlib_frame_queue_t *fq;
-
- fq = handoff_queue_by_worker_index [vlib_worker_index];
- if (fq != (vlib_frame_queue_t *)(~0))
- return fq;
-
- fq = vlib_frame_queues[vlib_worker_index];
- ASSERT (fq);
-
- if (PREDICT_FALSE(fq->tail >= (fq->head_hint + queue_hi_thresh))) {
- /* a valid entry in the array will indicate the queue has reached
- * the specified threshold and is congested
- */
- handoff_queue_by_worker_index [vlib_worker_index] = fq;
- fq->enqueue_full_events++;
- return fq;
- }
-
- return NULL;
-}
-
-static inline u64 ipv4_get_key (ip4_header_t *ip)
-{
- u64 hash_key;
-
- hash_key = *((u64*)(&ip->address_pair)) ^ ip->protocol;
-
- return hash_key;
-}
-
-static inline u64 ipv6_get_key (ip6_header_t *ip)
-{
- u64 hash_key;
-
- hash_key = ip->src_address.as_u64[0] ^
- rotate_left(ip->src_address.as_u64[1],13) ^
- rotate_left(ip->dst_address.as_u64[0],26) ^
- rotate_left(ip->dst_address.as_u64[1],39) ^
- ip->protocol;
-
- return hash_key;
-}
-
-
-#define MPLS_BOTTOM_OF_STACK_BIT_MASK 0x00000100U
-#define MPLS_LABEL_MASK 0xFFFFF000U
-
-static inline u64 mpls_get_key (mpls_unicast_header_t *m)
-{
- u64 hash_key;
- u8 ip_ver;
-
-
- /* find the bottom of the MPLS label stack. */
- if (PREDICT_TRUE(m->label_exp_s_ttl &
- clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK))) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (PREDICT_TRUE(m->label_exp_s_ttl &
- clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK))) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
- goto bottom_lbl_found;
- }
-
- /* the bottom label was not found - use the last label */
- hash_key = m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_LABEL_MASK);
-
- return hash_key;
-
-
-bottom_lbl_found:
- m++;
- ip_ver = (*((u8 *)m) >> 4);
-
- /* find out if it is IPV4 or IPV6 header */
- if (PREDICT_TRUE(ip_ver == 4)) {
- hash_key = ipv4_get_key((ip4_header_t *)m);
- } else if (PREDICT_TRUE(ip_ver == 6)) {
- hash_key = ipv6_get_key((ip6_header_t *)m);
- } else {
- /* use the bottom label */
- hash_key = (m-1)->label_exp_s_ttl & clib_net_to_host_u32(MPLS_LABEL_MASK);
- }
-
- return hash_key;
-
-}
-
-static inline u64 eth_get_key (ethernet_header_t *h0)
-{
- u64 hash_key;
-
-
- if (PREDICT_TRUE(h0->type) == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) {
- hash_key = ipv4_get_key((ip4_header_t *)(h0+1));
- } else if (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) {
- hash_key = ipv6_get_key((ip6_header_t *)(h0+1));
- } else if (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST)) {
- hash_key = mpls_get_key((mpls_unicast_header_t *)(h0+1));
- } else if ((h0->type == clib_host_to_net_u16(ETHERNET_TYPE_VLAN)) ||
- (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_DOT1AD))) {
- ethernet_vlan_header_t * outer = (ethernet_vlan_header_t *)(h0 + 1);
-
- outer = (outer->type == clib_host_to_net_u16(ETHERNET_TYPE_VLAN)) ?
- outer+1 : outer;
- if (PREDICT_TRUE(outer->type) == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) {
- hash_key = ipv4_get_key((ip4_header_t *)(outer+1));
- } else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6)) {
- hash_key = ipv6_get_key((ip6_header_t *)(outer+1));
- } else if (outer->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST)) {
- hash_key = mpls_get_key((mpls_unicast_header_t *)(outer+1));
- } else {
- hash_key = outer->type;
- }
- } else {
- hash_key = 0;
- }
-
- return hash_key;
-}
-
-/*
- * This function is used when dedicated IO threads feed the worker threads.
- *
- * Devices are allocated to this thread based on instances and instance_id.
- * If instances==0 then the function automatically determines the number
- * of instances of this thread, and allocates devices between them.
- * If instances != 0, then instance_id must be in the range 0..instances-1.
- * The function allocates devices among the specified number of instances,
- * with this thread having the given instance id. This option is used for
- * splitting devices among differently named "io"-type threads.
- */
-void dpdk_io_thread (vlib_worker_thread_t * w,
- u32 instances,
- u32 instance_id,
- char *worker_name,
- dpdk_io_thread_callback_t callback)
-{
- vlib_main_t * vm = vlib_get_main();
- vlib_thread_main_t * tm = vlib_get_thread_main();
- vlib_thread_registration_t * tr;
- dpdk_main_t * dm = &dpdk_main;
- char *io_name = w->registration->name;
- dpdk_device_t * xd;
- dpdk_device_t ** my_devices = 0;
- vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index = 0;
- vlib_frame_queue_t ** congested_handoff_queue_by_worker_index = 0;
- vlib_frame_queue_elt_t * hf = 0;
- int i;
- u32 n_left_to_next_worker = 0, * to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 cpu_index = os_get_cpu_number();
- u32 num_workers = 0;
- u32 num_devices = 0;
- uword * p;
- u16 queue_id = 0;
- vlib_node_runtime_t * node_trace;
- u32 first_worker_index = 0;
- u32 buffer_flags_template;
-
- /* Wait until the dpdk init sequence is complete */
- while (dm->io_thread_release == 0)
- vlib_worker_thread_barrier_check();
-
- clib_time_init (&vm->clib_time);
-
- p = hash_get_mem (tm->thread_registrations_by_name, worker_name);
- ASSERT (p);
- tr = (vlib_thread_registration_t *) p[0];
- if (tr)
- {
- num_workers = tr->count;
- first_worker_index = tr->first_index;
- }
-
- /* Allocate devices to this thread */
- if (instances == 0)
- {
- /* auto-assign */
- instance_id = w->instance_id;
-
- p = hash_get_mem (tm->thread_registrations_by_name, io_name);
- tr = (vlib_thread_registration_t *) p[0];
- /* Otherwise, how did we get here */
- ASSERT (tr && tr->count);
- instances = tr->count;
- }
- else
- {
- /* manually assign */
- ASSERT (instance_id < instances);
- }
-
- vec_validate (handoff_queue_elt_by_worker_index,
- first_worker_index + num_workers - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- first_worker_index + num_workers - 1,
- (vlib_frame_queue_t *)(~0));
-
- /* packet tracing is triggered on the dpdk-input node for ease-of-use */
- node_trace = vlib_node_get_runtime (vm, dpdk_input_node.index);
-
- buffer_flags_template = dm->buffer_flags_template;
-
- /* And handle them... */
- while (1)
- {
- u32 n_buffers;
- u32 mb_index;
- uword n_rx_bytes = 0;
- u32 n_trace, trace_cnt __attribute__((unused));
- vlib_buffer_free_list_t * fl;
- u32 hash;
- u64 hash_key;
- u8 efd_discard_burst;
-
- vlib_worker_thread_barrier_check ();
-
- /* Invoke callback if supplied */
- if (PREDICT_FALSE(callback != NULL))
- callback(vm);
-
- if (PREDICT_FALSE(vec_len(dm->devices) != num_devices))
- {
- vec_reset_length(my_devices);
- vec_foreach (xd, dm->devices)
- {
- if (((xd - dm->devices) % tr->count) == instance_id)
- {
- fprintf(stderr, "i/o thread %d (cpu %d) takes port %d\n",
- instance_id, (int) os_get_cpu_number(), (int) (xd - dm->devices));
- vec_add1 (my_devices, xd);
- }
- }
- num_devices = vec_len(dm->devices);
- }
-
- for (i = 0; i < vec_len (my_devices); i++)
- {
- xd = my_devices[i];
-
- if (!xd->admin_up)
- continue;
-
- n_buffers = dpdk_rx_burst(dm, xd, 0 /* queue_id */);
-
- if (n_buffers == 0)
- {
- /* check if EFD (dpdk) is enabled */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* reset a few stats */
- xd->efd_agent.last_poll_time = 0;
- xd->efd_agent.last_burst_sz = 0;
- }
- continue;
- }
-
- vec_reset_length (xd->d_trace_buffers);
- trace_cnt = n_trace = vlib_get_trace_count (vm, node_trace);
-
- /*
- * DAW-FIXME: VMXNET3 device stop/start doesn't work,
- * therefore fake the stop in the dpdk driver by
- * silently dropping all of the incoming pkts instead of
- * stopping the driver / hardware.
- */
- if (PREDICT_FALSE(xd->admin_up != 1))
- {
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free (xd->rx_vectors[queue_id][mb_index]);
- continue;
- }
-
- /* reset EFD action for the burst */
- efd_discard_burst = 0;
-
- /* Check for congestion if EFD (Early-Fast-Discard) is enabled
- * in any mode (e.g. dpdk, monitor, or drop_all)
- */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* update EFD counters */
- dpdk_efd_update_counters(xd, n_buffers, dm->efd.enabled);
-
- if (PREDICT_FALSE(dm->efd.enabled & DPDK_EFD_DROPALL_ENABLED))
- {
- /* drop all received packets */
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free(xd->rx_vectors[queue_id][mb_index]);
-
- xd->efd_agent.discard_cnt += n_buffers;
- increment_efd_drop_counter(vm,
- DPDK_ERROR_VLAN_EFD_DROP_PKTS,
- n_buffers);
-
- continue;
- }
-
- if (PREDICT_FALSE(xd->efd_agent.consec_full_frames_cnt >=
- dm->efd.consec_full_frames_hi_thresh))
- {
- u32 device_queue_sz = rte_eth_rx_queue_count(xd->device_index,
- queue_id);
- if (device_queue_sz >= dm->efd.queue_hi_thresh)
- {
- /* dpdk device queue has reached the critical threshold */
- xd->efd_agent.congestion_cnt++;
-
- /* apply EFD to packets from the burst */
- efd_discard_burst = 1;
- }
- }
- }
-
- fl = vlib_buffer_get_free_list
- (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- mb_index = 0;
-
- while (n_buffers > 0)
- {
- u32 bi0;
- u8 next0, error0;
- u32 l3_offset0;
- vlib_buffer_t * b0, * b_seg, * b_chain = 0;
- ethernet_header_t * h0;
- u8 nb_seg = 1;
- struct rte_mbuf *mb = xd->rx_vectors[queue_id][mb_index];
- struct rte_mbuf *mb_seg = mb->next;
-
- if (PREDICT_TRUE(n_buffers > 1))
- {
- struct rte_mbuf *pfmb = xd->rx_vectors[queue_id][mb_index+2];
- vlib_buffer_t *bp = (vlib_buffer_t *)(pfmb+1);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (bp->data, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- b0 = (vlib_buffer_t *)(mb+1);
-
- /* check whether EFD is looking for packets to discard */
- if (PREDICT_FALSE(efd_discard_burst))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type = is_efd_discardable(tm, b0, mb)))
- {
- rte_pktmbuf_free(mb);
- xd->efd_agent.discard_cnt++;
- increment_efd_drop_counter(vm,
- cntr_type,
- 1);
-
- n_buffers--;
- mb_index++;
- continue;
- }
- }
-
- /* Prefetch one next segment if it exists */
- if (PREDICT_FALSE(mb->nb_segs > 1))
- {
- struct rte_mbuf *pfmb = mb->next;
- vlib_buffer_t *bp = (vlib_buffer_t *)(pfmb+1);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- b_chain = b0;
- }
-
- bi0 = vlib_get_buffer_index (vm, b0);
- vlib_buffer_init_for_free_list (b0, fl);
- b0->clone_count = 0;
-
- dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0,
- &next0, &error0);
-#ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
- /*
- * Clear overloaded TX offload flags when a DPDK driver
- * is using them for RX flags (e.g. Cisco VIC Ethernet driver)
- */
- if (PREDICT_TRUE(trace_cnt == 0))
- mb->ol_flags &= PKT_EXT_RX_CLR_TX_FLAGS_MASK;
- else
- trace_cnt--;
-#endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
-
- if (error0)
- clib_warning ("bi %d error %d", bi0, error0);
-
- b0->error = 0;
-
- l3_offset0 = ((next0 == DPDK_RX_NEXT_IP4_INPUT ||
- next0 == DPDK_RX_NEXT_IP6_INPUT ||
- next0 == DPDK_RX_NEXT_MPLS_INPUT) ?
- sizeof (ethernet_header_t) : 0);
-
- b0->current_data = l3_offset0;
- b0->current_length = mb->data_len - l3_offset0;
-
- b0->flags = buffer_flags_template;
-
- if (VMWARE_LENGTH_BUG_WORKAROUND)
- b0->current_length -= 4;
-
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
- vnet_buffer(b0)->io_handoff.next_index = next0;
- n_rx_bytes += mb->pkt_len;
-
- /* Process subsequent segments of multi-segment packets */
- while ((mb->nb_segs > 1) && (nb_seg < mb->nb_segs))
- {
- ASSERT(mb_seg != 0);
-
- b_seg = (vlib_buffer_t *)(mb_seg+1);
- vlib_buffer_init_for_free_list (b_seg, fl);
- b_seg->clone_count = 0;
-
- ASSERT((b_seg->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
- ASSERT(b_seg->current_data == 0);
-
- /*
- * The driver (e.g. virtio) may not put the packet data at the start
- * of the segment, so don't assume b_seg->current_data == 0 is correct.
- */
- b_seg->current_data = (mb_seg->buf_addr + mb_seg->data_off) - (void *)b_seg->data;
-
- b_seg->current_length = mb_seg->data_len;
- b0->total_length_not_including_first_buffer +=
- mb_seg->data_len;
-
- b_chain->flags |= VLIB_BUFFER_NEXT_PRESENT;
- b_chain->next_buffer = vlib_get_buffer_index (vm, b_seg);
-
- b_chain = b_seg;
- mb_seg = mb_seg->next;
- nb_seg++;
- }
-
- /*
- * Turn this on if you run into
- * "bad monkey" contexts, and you want to know exactly
- * which nodes they've visited... See main.c...
- */
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b0);
-
- if (PREDICT_FALSE (n_trace > mb_index))
- vec_add1 (xd->d_trace_buffers, bi0);
-
- next_worker_index = first_worker_index;
-
- /*
- * Force unknown traffic onto worker 0,
- * and into ethernet-input. $$$$ add more hashes.
- */
- h0 = (ethernet_header_t *) b0->data;
-
- /* Compute ingress LB hash */
- hash_key = eth_get_key(h0);
- hash = (u32)clib_xxhash(hash_key);
-
- if (PREDICT_TRUE (is_pow2(num_workers)))
- next_worker_index += hash & (num_workers - 1);
- else
- next_worker_index += hash % num_workers;
-
- /* if EFD is enabled and not already discarding from dpdk,
- * check the worker ring/queue for congestion
- */
- if (PREDICT_FALSE(tm->efd.enabled && !efd_discard_burst))
- {
- vlib_frame_queue_t *fq;
-
- /* fq will be valid if the ring is congested */
- fq = is_vlib_handoff_queue_congested(
- next_worker_index, tm->efd.queue_hi_thresh,
- congested_handoff_queue_by_worker_index);
-
- if (PREDICT_FALSE(fq != NULL))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type =
- is_efd_discardable(tm, b0, mb)))
- {
- /* discard the packet */
- fq->enqueue_efd_discards++;
- increment_efd_drop_counter(vm, cntr_type, 1);
- rte_pktmbuf_free(mb);
- n_buffers--;
- mb_index++;
- continue;
- }
- }
- }
-
- if (next_worker_index != current_worker_index)
- {
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf = dpdk_get_handoff_queue_elt(
- next_worker_index,
- handoff_queue_elt_by_worker_index);
-
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_handoff_queue_elt(hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
-
- n_buffers--;
- mb_index++;
- }
-
- if (PREDICT_FALSE (vec_len (xd->d_trace_buffers) > 0))
- {
- /* credit the trace to the trace node */
- dpdk_rx_trace (dm, node_trace, xd, queue_id, xd->d_trace_buffers,
- vec_len (xd->d_trace_buffers));
- vlib_set_trace_count (vm, node_trace, n_trace - vec_len (xd->d_trace_buffers));
- }
-
- vlib_increment_combined_counter
- (vnet_get_main()->interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX,
- cpu_index,
- xd->vlib_sw_if_index,
- mb_index, n_rx_bytes);
-
- dpdk_worker_t * dw = vec_elt_at_index(dm->workers, cpu_index);
- dw->aggregate_rx_packets += mb_index;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_handoff_queue_elt(hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] = (vlib_frame_queue_t *)(~0);
- }
- hf = 0;
- current_worker_index = ~0;
-
- vlib_increment_main_loop_counter (vm);
- }
-}
-
-/*
- * This function is used when the main thread performs IO and feeds the
- * worker threads.
- */
-static uword
-dpdk_io_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * f)
-{
- dpdk_main_t * dm = &dpdk_main;
- dpdk_device_t * xd;
- vlib_thread_main_t * tm = vlib_get_thread_main();
- uword n_rx_packets = 0;
- static vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index;
- static vlib_frame_queue_t ** congested_handoff_queue_by_worker_index = 0;
- vlib_frame_queue_elt_t * hf = 0;
- int i;
- u32 n_left_to_next_worker = 0, * to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 cpu_index = os_get_cpu_number();
- static int num_workers_set;
- static u32 num_workers;
- u16 queue_id = 0;
- vlib_node_runtime_t * node_trace;
- static u32 first_worker_index;
- u32 buffer_flags_template;
-
- if (PREDICT_FALSE(num_workers_set == 0))
- {
- uword * p;
- vlib_thread_registration_t * tr;
- /* Only the standard vnet worker threads are supported */
- p = hash_get_mem (tm->thread_registrations_by_name, "workers");
- tr = (vlib_thread_registration_t *) p[0];
- if (tr)
- {
- num_workers = tr->count;
- first_worker_index = tr->first_index;
- }
- num_workers_set = 1;
- }
-
- if (PREDICT_FALSE(handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- first_worker_index + num_workers - 1,
- (vlib_frame_queue_t *)(~0));
- }
-
- /* packet tracing is triggered on the dpdk-input node for ease-of-use */
- node_trace = vlib_node_get_runtime (vm, dpdk_input_node.index);
-
- buffer_flags_template = dm->buffer_flags_template;
-
- vec_foreach (xd, dm->devices)
- {
- u32 n_buffers;
- u32 mb_index;
- uword n_rx_bytes = 0;
- u32 n_trace, trace_cnt __attribute__((unused));
- vlib_buffer_free_list_t * fl;
- u32 hash;
- u64 hash_key;
- u8 efd_discard_burst = 0;
-
- if (!xd->admin_up)
- continue;
-
- n_buffers = dpdk_rx_burst(dm, xd, queue_id );
-
- if (n_buffers == 0)
- {
- /* check if EFD (dpdk) is enabled */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* reset a few stats */
- xd->efd_agent.last_poll_time = 0;
- xd->efd_agent.last_burst_sz = 0;
- }
- continue;
- }
-
- vec_reset_length (xd->d_trace_buffers);
- trace_cnt = n_trace = vlib_get_trace_count (vm, node_trace);
-
- /*
- * DAW-FIXME: VMXNET3 device stop/start doesn't work,
- * therefore fake the stop in the dpdk driver by
- * silently dropping all of the incoming pkts instead of
- * stopping the driver / hardware.
- */
- if (PREDICT_FALSE(xd->admin_up != 1))
- {
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free (xd->rx_vectors[queue_id][mb_index]);
- continue;
- }
-
- /* Check for congestion if EFD (Early-Fast-Discard) is enabled
- * in any mode (e.g. dpdk, monitor, or drop_all)
- */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* update EFD counters */
- dpdk_efd_update_counters(xd, n_buffers, dm->efd.enabled);
-
- if (PREDICT_FALSE(dm->efd.enabled & DPDK_EFD_DROPALL_ENABLED))
- {
- /* discard all received packets */
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free(xd->rx_vectors[queue_id][mb_index]);
-
- xd->efd_agent.discard_cnt += n_buffers;
- increment_efd_drop_counter(vm,
- DPDK_ERROR_VLAN_EFD_DROP_PKTS,
- n_buffers);
-
- continue;
- }
-
- if (PREDICT_FALSE(xd->efd_agent.consec_full_frames_cnt >=
- dm->efd.consec_full_frames_hi_thresh))
- {
- u32 device_queue_sz = rte_eth_rx_queue_count(xd->device_index,
- queue_id);
- if (device_queue_sz >= dm->efd.queue_hi_thresh)
- {
- /* dpdk device queue has reached the critical threshold */
- xd->efd_agent.congestion_cnt++;
-
- /* apply EFD to packets from the burst */
- efd_discard_burst = 1;
- }
- }
- }
-
- fl = vlib_buffer_get_free_list
- (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- mb_index = 0;
-
- while (n_buffers > 0)
- {
- u32 bi0;
- u8 next0, error0;
- u32 l3_offset0;
- vlib_buffer_t * b0, * b_seg, * b_chain = 0;
- ethernet_header_t * h0;
- u8 nb_seg = 1;
- struct rte_mbuf *mb = xd->rx_vectors[queue_id][mb_index];
- struct rte_mbuf *mb_seg = mb->next;
-
- if (PREDICT_TRUE(n_buffers > 1))
- {
- struct rte_mbuf *pfmb = xd->rx_vectors[queue_id][mb_index+2];
- vlib_buffer_t *bp = (vlib_buffer_t *)(pfmb+1);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (bp->data, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- b0 = (vlib_buffer_t *)(mb+1);
-
- /* check whether EFD is looking for packets to discard */
- if (PREDICT_FALSE(efd_discard_burst))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type = is_efd_discardable(tm, b0, mb)))
- {
- rte_pktmbuf_free(mb);
- xd->efd_agent.discard_cnt++;
- increment_efd_drop_counter(vm,
- cntr_type,
- 1);
-
- n_buffers--;
- mb_index++;
- continue;
- }
- }
-
- /* Prefetch one next segment if it exists */
- if (PREDICT_FALSE(mb->nb_segs > 1))
- {
- struct rte_mbuf *pfmb = mb->next;
- vlib_buffer_t *bp = (vlib_buffer_t *)(pfmb+1);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- b_chain = b0;
- }
-
- bi0 = vlib_get_buffer_index (vm, b0);
- vlib_buffer_init_for_free_list (b0, fl);
- b0->clone_count = 0;
-
- dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0,
- &next0, &error0);
-#ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
- /*
- * Clear overloaded TX offload flags when a DPDK driver
- * is using them for RX flags (e.g. Cisco VIC Ethernet driver)
- */
- if (PREDICT_TRUE(trace_cnt == 0))
- mb->ol_flags &= PKT_EXT_RX_CLR_TX_FLAGS_MASK;
- else
- trace_cnt--;
-#endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
-
- if (error0)
- clib_warning ("bi %d error %d", bi0, error0);
-
- b0->error = 0;
-
- l3_offset0 = ((next0 == DPDK_RX_NEXT_IP4_INPUT ||
- next0 == DPDK_RX_NEXT_IP6_INPUT ||
- next0 == DPDK_RX_NEXT_MPLS_INPUT) ?
- sizeof (ethernet_header_t) : 0);
-
- b0->current_data = l3_offset0;
- b0->current_length = mb->data_len - l3_offset0;
-
- b0->flags = buffer_flags_template;
-
- if (VMWARE_LENGTH_BUG_WORKAROUND)
- b0->current_length -= 4;
-
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
- vnet_buffer(b0)->io_handoff.next_index = next0;
- n_rx_bytes += mb->pkt_len;
-
- /* Process subsequent segments of multi-segment packets */
- while ((mb->nb_segs > 1) && (nb_seg < mb->nb_segs))
- {
- ASSERT(mb_seg != 0);
-
- b_seg = (vlib_buffer_t *)(mb_seg+1);
- vlib_buffer_init_for_free_list (b_seg, fl);
- b_seg->clone_count = 0;
-
- ASSERT((b_seg->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
- ASSERT(b_seg->current_data == 0);
-
- /*
- * The driver (e.g. virtio) may not put the packet data at the start
- * of the segment, so don't assume b_seg->current_data == 0 is correct.
- */
- b_seg->current_data = (mb_seg->buf_addr + mb_seg->data_off) - (void *)b_seg->data;
-
- b_seg->current_length = mb_seg->data_len;
- b0->total_length_not_including_first_buffer +=
- mb_seg->data_len;
-
- b_chain->flags |= VLIB_BUFFER_NEXT_PRESENT;
- b_chain->next_buffer = vlib_get_buffer_index (vm, b_seg);
-
- b_chain = b_seg;
- mb_seg = mb_seg->next;
- nb_seg++;
- }
-
- /*
- * Turn this on if you run into
- * "bad monkey" contexts, and you want to know exactly
- * which nodes they've visited... See main.c...
- */
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b0);
-
- if (PREDICT_FALSE (n_trace > mb_index))
- vec_add1 (xd->d_trace_buffers, bi0);
-
- next_worker_index = first_worker_index;
-
- /*
- * Force unknown traffic onto worker 0,
- * and into ethernet-input. $$$$ add more hashes.
- */
- h0 = (ethernet_header_t *) b0->data;
-
- /* Compute ingress LB hash */
- hash_key = eth_get_key(h0);
- hash = (u32)clib_xxhash(hash_key);
-
- if (PREDICT_TRUE (is_pow2(num_workers)))
- next_worker_index += hash & (num_workers - 1);
- else
- next_worker_index += hash % num_workers;
-
- /* if EFD is enabled and not already discarding from dpdk,
- * check the worker ring/queue for congestion
- */
- if (PREDICT_FALSE(tm->efd.enabled && !efd_discard_burst))
- {
- vlib_frame_queue_t *fq;
-
- /* fq will be valid if the ring is congested */
- fq = is_vlib_handoff_queue_congested(
- next_worker_index, tm->efd.queue_hi_thresh,
- congested_handoff_queue_by_worker_index);
-
- if (PREDICT_FALSE(fq != NULL))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type =
- is_efd_discardable(tm, b0, mb)))
- {
- /* discard the packet */
- fq->enqueue_efd_discards++;
- increment_efd_drop_counter(vm, cntr_type, 1);
- rte_pktmbuf_free(mb);
- n_buffers--;
- mb_index++;
- continue;
- }
- }
- }
-
- if (next_worker_index != current_worker_index)
- {
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf = dpdk_get_handoff_queue_elt(
- next_worker_index,
- handoff_queue_elt_by_worker_index);
-
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_handoff_queue_elt(hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
-
- n_buffers--;
- mb_index++;
- }
-
- if (PREDICT_FALSE (vec_len (xd->d_trace_buffers) > 0))
- {
- /* credit the trace to the trace node */
- dpdk_rx_trace (dm, node_trace, xd, queue_id, xd->d_trace_buffers,
- vec_len (xd->d_trace_buffers));
- vlib_set_trace_count (vm, node_trace, n_trace - vec_len (xd->d_trace_buffers));
- }
-
- vlib_increment_combined_counter
- (vnet_get_main()->interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX,
- cpu_index,
- xd->vlib_sw_if_index,
- mb_index, n_rx_bytes);
-
- dpdk_worker_t * dw = vec_elt_at_index(dm->workers, cpu_index);
- dw->aggregate_rx_packets += mb_index;
- n_rx_packets += mb_index;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_handoff_queue_elt(hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] = (vlib_frame_queue_t *)(~0);
- }
- hf = 0;
- current_worker_index = ~0;
- return n_rx_packets;
-}
-
-VLIB_REGISTER_NODE (dpdk_io_input_node) = {
- .function = dpdk_io_input,
- .type = VLIB_NODE_TYPE_INPUT,
- .name = "dpdk-io-input",
-
- /* Will be enabled if/when hardware is detected. */
- .state = VLIB_NODE_STATE_DISABLED,
-
- .format_buffer = format_ethernet_header_with_length,
- .format_trace = format_dpdk_rx_dma_trace,
-
- .n_errors = DPDK_N_ERROR,
- .error_strings = dpdk_error_strings,
-
- .n_next_nodes = DPDK_RX_N_NEXT,
- .next_nodes = {
- [DPDK_RX_NEXT_DROP] = "error-drop",
- [DPDK_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
- [DPDK_RX_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
- [DPDK_RX_NEXT_IP6_INPUT] = "ip6-input",
- [DPDK_RX_NEXT_MPLS_INPUT] = "mpls-gre-input",
- },
-};
-
/*
* set_efd_bitmap()
* Based on the operation type, set lower/upper bits for the given index value
Code Review / vpp.git / blobdiff