X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fmemif%2Fnode.c;h=2b8c4f2d2285a243c23ed3c90ad994ecc4ab01dd;hb=067cd6229a47ea3ba8b59a2a04090e80afb5bd2c;hp=fd7baa30e64445fdb58cbee89588835ceb3b30ed;hpb=c2ebcbb89bea719418fc3f896ae3de4302acaf6d;p=vpp.git diff --git a/src/plugins/memif/node.c b/src/plugins/memif/node.c index fd7baa30e64..2b8c4f2d228 100644 --- a/src/plugins/memif/node.c +++ b/src/plugins/memif/node.c @@ -28,8 +28,11 @@ #include #include +#include -#define foreach_memif_input_error +#define foreach_memif_input_error \ + _(BUFFER_ALLOC_FAIL, "buffer allocation failed") \ + _(NOT_IP, "not ip packet") typedef enum { @@ -39,7 +42,7 @@ typedef enum MEMIF_INPUT_N_ERROR, } memif_input_error_t; -static char *memif_input_error_strings[] = { +static __clib_unused char *memif_input_error_strings[] = { #define _(n,s) s, foreach_memif_input_error #undef _ @@ -52,13 +55,13 @@ typedef struct u16 ring; } memif_input_trace_t; -static u8 * +static __clib_unused u8 * format_memif_input_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 *); memif_input_trace_t *t = va_arg (*args, memif_input_trace_t *); - uword indent = format_get_indent (s); + u32 indent = format_get_indent (s); s = format (s, "memif: hw_if_index %d next-index %d", t->hw_if_index, t->next_index); @@ -67,293 +70,849 @@ format_memif_input_trace (u8 * s, va_list * args) return s; } +static_always_inline u32 +memif_next_from_ip_hdr (vlib_node_runtime_t * node, vlib_buffer_t * b) +{ + u8 *ptr = vlib_buffer_get_current (b); + u8 v = *ptr & 0xf0; + + if (PREDICT_TRUE (v == 0x40)) + return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT; + else if (PREDICT_TRUE (v == 0x60)) + return VNET_DEVICE_INPUT_NEXT_IP6_INPUT; + + b->error = node->errors[MEMIF_INPUT_ERROR_NOT_IP]; + return VNET_DEVICE_INPUT_NEXT_DROP; +} + +static_always_inline void +memif_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node, + memif_if_t * mif, vlib_buffer_t * b, u32 next, u16 qid, + uword * n_tracep) +{ + VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b); + + if (PREDICT_TRUE (b != 0)) + { + memif_input_trace_t *tr; + vlib_trace_buffer (vm, node, next, b, /* follow_chain */ 0); + vlib_set_trace_count (vm, node, --(*n_tracep)); + tr = vlib_add_trace (vm, node, b, sizeof (*tr)); + tr->next_index = next; + tr->hw_if_index = mif->hw_if_index; + tr->ring = qid; + } +} + static_always_inline void -memif_prefetch (vlib_main_t * vm, u32 bi) +memif_add_copy_op (memif_per_thread_data_t * ptd, void *data, u32 len, + u16 buffer_offset, u16 buffer_vec_index) +{ + memif_copy_op_t *co; + vec_add2_aligned (ptd->copy_ops, co, 1, CLIB_CACHE_LINE_BYTES); + co->data = data; + co->data_len = len; + co->buffer_offset = buffer_offset; + co->buffer_vec_index = buffer_vec_index; +} + +static_always_inline void +memif_add_to_chain (vlib_main_t * vm, vlib_buffer_t * b, u32 * buffers, + u32 buffer_size) +{ + vlib_buffer_t *seg = b; + i32 bytes_left = b->current_length - buffer_size + b->current_data; + + if (PREDICT_TRUE (bytes_left <= 0)) + return; + + b->current_length -= bytes_left; + b->total_length_not_including_first_buffer = bytes_left; + + while (bytes_left) + { + seg->flags |= VLIB_BUFFER_NEXT_PRESENT; + seg->next_buffer = buffers[0]; + seg = vlib_get_buffer (vm, buffers[0]); + buffers++; + seg->current_data = 0; + seg->current_length = clib_min (buffer_size, bytes_left); + bytes_left -= seg->current_length; + } +} + +static_always_inline u32 +sat_sub (u32 x, u32 y) { - vlib_buffer_t *b = vlib_get_buffer (vm, bi); - vlib_prefetch_buffer_header (b, STORE); - CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, STORE); + u32 res = x - y; + res &= -(res <= x); + return res; +} + +/* branchless validation of the descriptor - uses saturated subtraction */ +static_always_inline u32 +memif_desc_is_invalid (memif_if_t * mif, memif_desc_t * d, u32 buffer_length) +{ + u32 rv; + u16 valid_flags = MEMIF_DESC_FLAG_NEXT; + + rv = d->flags & (~valid_flags); + rv |= sat_sub (d->region + 1, vec_len (mif->regions)); + rv |= sat_sub (d->length, buffer_length); + rv |= sat_sub (d->offset + d->length, mif->regions[d->region].region_size); + + if (PREDICT_FALSE (rv)) + { + mif->flags |= MEMIF_IF_FLAG_ERROR; + return 1; + } + + return 0; } static_always_inline uword memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, memif_if_t * mif, - memif_ring_type_t type, u16 rid) + memif_ring_type_t type, u16 qid, + memif_interface_mode_t mode) { vnet_main_t *vnm = vnet_get_main (); - memif_ring_t *ring = memif_get_ring (mif, type, rid); - memif_ring_data_t *rd; - u16 head; - u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; + memif_main_t *mm = &memif_main; + memif_ring_t *ring; + memif_queue_t *mq; + u16 buffer_size = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES; + u32 next_index; uword n_trace = vlib_get_trace_count (vm, node); - memif_main_t *nm = &memif_main; - u32 n_rx_packets = 0; - u32 n_rx_bytes = 0; - u32 *to_next = 0; - u32 n_free_bufs; - u32 thread_index = vlib_get_thread_index (); - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - u16 ring_size = 1 << mif->log2_ring_size; - u16 mask = ring_size - 1; - u16 num_slots; - void *mb0, *mb1; - - rd = vec_elt_at_index (mif->ring_data, rid + type * mif->num_s2m_rings); - if (mif->per_interface_next_index != ~0) - next_index = mif->per_interface_next_index; - - n_free_bufs = vec_len (nm->rx_buffers[thread_index]); - if (PREDICT_FALSE (n_free_bufs < ring_size)) + u32 n_rx_packets = 0, n_rx_bytes = 0; + u32 n_left, *to_next = 0; + u32 bi0, bi1, bi2, bi3; + vlib_buffer_t *b0, *b1, *b2, *b3; + u32 thread_index = vm->thread_index; + memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data, + thread_index); + vlib_buffer_t *bt = &ptd->buffer_template; + u16 cur_slot, last_slot, ring_size, n_slots, mask; + i16 start_offset; + u16 n_buffers = 0, n_alloc; + memif_copy_op_t *co; + memif_packet_op_t *po; + memif_region_index_t last_region = ~0; + void *last_region_shm = 0; + + mq = vec_elt_at_index (mif->rx_queues, qid); + ring = mq->ring; + ring_size = 1 << mq->log2_ring_size; + mask = ring_size - 1; + + next_index = (mode == MEMIF_INTERFACE_MODE_IP) ? + VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; + + /* asume that somebody will want to add ethernet header on the packet + so start with IP header at offset 14 */ + start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0; + + /* for S2M rings, we are consumers of packet buffers, and for M2S rings we + are producers of empty buffers */ + cur_slot = (type == MEMIF_RING_S2M) ? mq->last_head : mq->last_tail; + last_slot = (type == MEMIF_RING_S2M) ? ring->head : ring->tail; + if (cur_slot == last_slot) + goto refill; + n_slots = last_slot - cur_slot; + + /* construct copy and packet vector out of ring slots */ + while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ) { - vec_validate (nm->rx_buffers[thread_index], - ring_size + n_free_bufs - 1); - n_free_bufs += - vlib_buffer_alloc (vm, &nm->rx_buffers[thread_index][n_free_bufs], - ring_size); - _vec_len (nm->rx_buffers[thread_index]) = n_free_bufs; + u32 dst_off, src_off, n_bytes_left; + u16 s0; + memif_desc_t *d0; + void *mb0; + po = ptd->packet_ops + n_rx_packets; + n_rx_packets++; + po->first_buffer_vec_index = n_buffers++; + po->packet_len = 0; + src_off = 0; + dst_off = start_offset; + + next_slot: + CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask], + CLIB_CACHE_LINE_BYTES, LOAD); + s0 = cur_slot & mask; + d0 = &ring->desc[s0]; + n_bytes_left = d0->length; + + /* slave resets buffer length, + * so it can produce full size buffer for master + */ + if (type == MEMIF_RING_M2S) + d0->length = mif->run.buffer_size; + + po->packet_len += n_bytes_left; + if (PREDICT_FALSE (last_region != d0->region)) + { + last_region_shm = mif->regions[d0->region].shm; + last_region = d0->region; + } + mb0 = last_region_shm + d0->offset; + + do + { + u32 dst_free = buffer_size - dst_off; + if (dst_free == 0) + { + dst_off = 0; + dst_free = buffer_size; + n_buffers++; + } + u32 bytes_to_copy = clib_min (dst_free, n_bytes_left); + memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off, + n_buffers - 1); + n_bytes_left -= bytes_to_copy; + src_off += bytes_to_copy; + dst_off += bytes_to_copy; + } + while (PREDICT_FALSE (n_bytes_left)); + + cur_slot++; + n_slots--; + if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots) + { + src_off = 0; + goto next_slot; + } } - head = ring->head; - if (head == rd->last_head) - return 0; + /* allocate free buffers */ + vec_validate_aligned (ptd->buffers, n_buffers - 1, CLIB_CACHE_LINE_BYTES); + n_alloc = vlib_buffer_alloc (vm, ptd->buffers, n_buffers); + if (PREDICT_FALSE (n_alloc != n_buffers)) + { + if (n_alloc) + vlib_buffer_free (vm, ptd->buffers, n_alloc); + vlib_error_count (vm, node->node_index, + MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1); + goto refill; + } + + /* copy data */ + n_left = vec_len (ptd->copy_ops); + co = ptd->copy_ops; + while (n_left >= 8) + { + CLIB_PREFETCH (co[4].data, CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (co[5].data, CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (co[6].data, CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (co[7].data, CLIB_CACHE_LINE_BYTES, LOAD); + + b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]); + b1 = vlib_get_buffer (vm, ptd->buffers[co[1].buffer_vec_index]); + b2 = vlib_get_buffer (vm, ptd->buffers[co[2].buffer_vec_index]); + b3 = vlib_get_buffer (vm, ptd->buffers[co[3].buffer_vec_index]); + + clib_memcpy (b0->data + co[0].buffer_offset, co[0].data, + co[0].data_len); + clib_memcpy (b1->data + co[1].buffer_offset, co[1].data, + co[1].data_len); + clib_memcpy (b2->data + co[2].buffer_offset, co[2].data, + co[2].data_len); + clib_memcpy (b3->data + co[3].buffer_offset, co[3].data, + co[3].data_len); + + co += 4; + n_left -= 4; + } + while (n_left) + { + b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]); + clib_memcpy (b0->data + co[0].buffer_offset, co[0].data, + co[0].data_len); + co += 1; + n_left -= 1; + } - if (head > rd->last_head) - num_slots = head - rd->last_head; + /* release slots from the ring */ + if (type == MEMIF_RING_S2M) + { + CLIB_MEMORY_STORE_BARRIER (); + ring->tail = mq->last_head = cur_slot; + } else - num_slots = ring_size - rd->last_head + head; + { + mq->last_tail = cur_slot; + } + + u32 n_from = n_rx_packets; + po = ptd->packet_ops; - while (num_slots) + vnet_buffer (bt)->sw_if_index[VLIB_RX] = mif->sw_if_index; + bt->current_data = start_offset; + + while (n_from) { u32 n_left_to_next; - u32 next0 = next_index; - u32 next1 = next_index; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + u32 next0, next1, next2, next3; - while (num_slots > 5 && n_left_to_next > 2) + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + while (n_from >= 8 && n_left_to_next >= 4) { - if (PREDICT_TRUE (rd->last_head + 5 < ring_size)) + b0 = vlib_get_buffer (vm, po[4].first_buffer_vec_index); + b1 = vlib_get_buffer (vm, po[5].first_buffer_vec_index); + b2 = vlib_get_buffer (vm, po[6].first_buffer_vec_index); + b3 = vlib_get_buffer (vm, po[7].first_buffer_vec_index); + vlib_prefetch_buffer_header (b0, STORE); + vlib_prefetch_buffer_header (b1, STORE); + vlib_prefetch_buffer_header (b2, STORE); + vlib_prefetch_buffer_header (b3, STORE); + + /* enqueue buffer */ + u32 fbvi0 = po[0].first_buffer_vec_index; + u32 fbvi1 = po[1].first_buffer_vec_index; + u32 fbvi2 = po[2].first_buffer_vec_index; + u32 fbvi3 = po[3].first_buffer_vec_index; + to_next[0] = bi0 = ptd->buffers[fbvi0]; + to_next[1] = bi1 = ptd->buffers[fbvi1]; + to_next[2] = bi2 = ptd->buffers[fbvi2]; + to_next[3] = bi3 = ptd->buffers[fbvi3]; + to_next += 4; + n_left_to_next -= 4; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + b2 = vlib_get_buffer (vm, bi2); + b3 = vlib_get_buffer (vm, bi3); + + clib_memcpy64_x4 (b0, b1, b2, b3, bt); + + b0->current_length = po[0].packet_len; + n_rx_bytes += b0->current_length; + b1->current_length = po[1].packet_len; + n_rx_bytes += b1->current_length; + b2->current_length = po[2].packet_len; + n_rx_bytes += b2->current_length; + b3->current_length = po[3].packet_len; + n_rx_bytes += b3->current_length; + + memif_add_to_chain (vm, b0, ptd->buffers + fbvi0 + 1, buffer_size); + memif_add_to_chain (vm, b1, ptd->buffers + fbvi1 + 1, buffer_size); + memif_add_to_chain (vm, b2, ptd->buffers + fbvi2 + 1, buffer_size); + memif_add_to_chain (vm, b3, ptd->buffers + fbvi3 + 1, buffer_size); + + if (mode == MEMIF_INTERFACE_MODE_IP) { - CLIB_PREFETCH (memif_get_buffer (mif, ring, rd->last_head + 2), - CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (memif_get_buffer (mif, ring, rd->last_head + 3), - CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (&ring->desc[rd->last_head + 4], - CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (&ring->desc[rd->last_head + 5], - CLIB_CACHE_LINE_BYTES, LOAD); + next0 = memif_next_from_ip_hdr (node, b0); + next1 = memif_next_from_ip_hdr (node, b1); + next2 = memif_next_from_ip_hdr (node, b2); + next3 = memif_next_from_ip_hdr (node, b3); } - else + else if (mode == MEMIF_INTERFACE_MODE_ETHERNET) { - CLIB_PREFETCH (memif_get_buffer - (mif, ring, (rd->last_head + 2) % mask), - CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (memif_get_buffer - (mif, ring, (rd->last_head + 3) % mask), - CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (&ring->desc[(rd->last_head + 4) % mask], - CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (&ring->desc[(rd->last_head + 5) % mask], - CLIB_CACHE_LINE_BYTES, LOAD); + if (PREDICT_FALSE (mif->per_interface_next_index != ~0)) + { + next0 = mif->per_interface_next_index; + next1 = mif->per_interface_next_index; + next2 = mif->per_interface_next_index; + next3 = mif->per_interface_next_index; + } + else + { + next0 = next1 = next2 = next3 = next_index; + /* redirect if feature path enabled */ + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next0, b0); + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next1, b1); + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next2, b2); + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next3, b3); + } } - /* get empty buffer */ - u32 last_buf = vec_len (nm->rx_buffers[thread_index]) - 1; - bi0 = nm->rx_buffers[thread_index][last_buf]; - bi1 = nm->rx_buffers[thread_index][last_buf - 1]; - _vec_len (nm->rx_buffers[thread_index]) -= 2; - if (last_buf > 4) + /* trace */ + if (PREDICT_FALSE (n_trace > 0)) { - memif_prefetch (vm, nm->rx_buffers[thread_index][last_buf - 2]); - memif_prefetch (vm, nm->rx_buffers[thread_index][last_buf - 3]); + memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace); + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace); + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace); + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace); } + /* enqueue */ + vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, + n_left_to_next, bi0, bi1, bi2, bi3, + next0, next1, next2, next3); + + /* next */ + n_from -= 4; + po += 4; + } + while (n_from && n_left_to_next) + { /* enqueue buffer */ - to_next[0] = bi0; - to_next[1] = bi1; - to_next += 2; - n_left_to_next -= 2; + u32 fbvi0 = po->first_buffer_vec_index; + to_next[0] = bi0 = ptd->buffers[fbvi0]; + to_next += 1; + n_left_to_next--; - /* fill buffer metadata */ b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); + clib_memcpy (b0, bt, 64); + b0->current_length = po->packet_len; + n_rx_bytes += b0->current_length; - vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index; - vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index; + memif_add_to_chain (vm, b0, ptd->buffers + fbvi0 + 1, buffer_size); + + if (mode == MEMIF_INTERFACE_MODE_IP) + { + next0 = memif_next_from_ip_hdr (node, b0); + } + else if (mode == MEMIF_INTERFACE_MODE_ETHERNET) + { + if (PREDICT_FALSE (mif->per_interface_next_index != ~0)) + next0 = mif->per_interface_next_index; + else + { + next0 = next_index; + /* redirect if feature path enabled */ + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next0, b0); + } + + } - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; + /* trace */ + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace); + + /* enqueue */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + + /* next */ + n_from--; + po++; + } + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters + + VNET_INTERFACE_COUNTER_RX, thread_index, + mif->hw_if_index, n_rx_packets, + n_rx_bytes); - /* copy buffer */ - mb0 = memif_get_buffer (mif, ring, rd->last_head); - clib_memcpy (vlib_buffer_get_current (b0), mb0, - CLIB_CACHE_LINE_BYTES); - b0->current_length = ring->desc[rd->last_head].length; - rd->last_head = (rd->last_head + 1) & mask; + /* refill ring with empty buffers */ +refill: + vec_reset_length (ptd->buffers); + vec_reset_length (ptd->copy_ops); - mb1 = memif_get_buffer (mif, ring, rd->last_head); - clib_memcpy (vlib_buffer_get_current (b1), mb1, - CLIB_CACHE_LINE_BYTES); - b1->current_length = ring->desc[rd->last_head].length; - rd->last_head = (rd->last_head + 1) & mask; + if (type == MEMIF_RING_M2S) + { + u16 head = ring->head; + n_slots = ring_size - head + mq->last_tail; - if (b0->current_length > CLIB_CACHE_LINE_BYTES) - clib_memcpy (vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES, - mb0 + CLIB_CACHE_LINE_BYTES, - b0->current_length - CLIB_CACHE_LINE_BYTES); + while (n_slots--) + { + u16 s = head++ & mask; + memif_desc_t *d = &ring->desc[s]; + d->length = mif->run.buffer_size; + } - if (b1->current_length > CLIB_CACHE_LINE_BYTES) - clib_memcpy (vlib_buffer_get_current (b1) + CLIB_CACHE_LINE_BYTES, - mb1 + CLIB_CACHE_LINE_BYTES, - b1->current_length - CLIB_CACHE_LINE_BYTES); + CLIB_MEMORY_STORE_BARRIER (); + ring->head = head; + } - /* trace */ - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1); + return n_rx_packets; +} - if (PREDICT_FALSE (n_trace > 0)) +static_always_inline uword +memif_device_input_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame, memif_if_t * mif, + u16 qid, memif_interface_mode_t mode) +{ + vnet_main_t *vnm = vnet_get_main (); + memif_main_t *mm = &memif_main; + memif_ring_t *ring; + memif_queue_t *mq; + u32 next_index; + uword n_trace = vlib_get_trace_count (vm, node); + u32 n_rx_packets = 0, n_rx_bytes = 0; + u32 *to_next = 0, *buffers; + u32 bi0, bi1, bi2, bi3; + u16 s0, s1, s2, s3; + memif_desc_t *d0, *d1, *d2, *d3; + vlib_buffer_t *b0, *b1, *b2, *b3; + u32 thread_index = vm->thread_index; + memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data, + thread_index); + u16 cur_slot, last_slot, ring_size, n_slots, mask, head; + i16 start_offset; + u32 buffer_length; + u16 n_alloc, n_from; + + mq = vec_elt_at_index (mif->rx_queues, qid); + ring = mq->ring; + ring_size = 1 << mq->log2_ring_size; + mask = ring_size - 1; + + next_index = (mode == MEMIF_INTERFACE_MODE_IP) ? + VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; + + /* asume that somebody will want to add ethernet header on the packet + so start with IP header at offset 14 */ + start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0; + buffer_length = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES - start_offset; + + cur_slot = mq->last_tail; + last_slot = ring->tail; + if (cur_slot == last_slot) + goto refill; + n_slots = last_slot - cur_slot; + + /* process ring slots */ + vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ, + CLIB_CACHE_LINE_BYTES); + while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ) + { + vlib_buffer_t *hb; + + s0 = cur_slot & mask; + bi0 = mq->buffers[s0]; + ptd->buffers[n_rx_packets++] = bi0; + + CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask], + CLIB_CACHE_LINE_BYTES, LOAD); + d0 = &ring->desc[s0]; + hb = b0 = vlib_get_buffer (vm, bi0); + b0->current_data = start_offset; + b0->current_length = start_offset + d0->length; + n_rx_bytes += d0->length; + + if (0 && memif_desc_is_invalid (mif, d0, buffer_length)) + return 0; + + cur_slot++; + n_slots--; + if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)) + { + hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; + next_slot: + s0 = cur_slot & mask; + d0 = &ring->desc[s0]; + bi0 = mq->buffers[s0]; + + /* previous buffer */ + b0->next_buffer = bi0; + b0->flags |= VLIB_BUFFER_NEXT_PRESENT; + + /* current buffer */ + b0 = vlib_get_buffer (vm, bi0); + b0->current_data = start_offset; + b0->current_length = start_offset + d0->length; + hb->total_length_not_including_first_buffer += d0->length; + n_rx_bytes += d0->length; + + cur_slot++; + n_slots--; + if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots) + goto next_slot; + } + } + + /* release slots from the ring */ + mq->last_tail = cur_slot; + + n_from = n_rx_packets; + buffers = ptd->buffers; + + while (n_from) + { + u32 n_left_to_next; + u32 next0, next1, next2, next3; + + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + while (n_from >= 8 && n_left_to_next >= 4) + { + b0 = vlib_get_buffer (vm, buffers[4]); + b1 = vlib_get_buffer (vm, buffers[5]); + b2 = vlib_get_buffer (vm, buffers[6]); + b3 = vlib_get_buffer (vm, buffers[7]); + vlib_prefetch_buffer_header (b0, STORE); + vlib_prefetch_buffer_header (b1, STORE); + vlib_prefetch_buffer_header (b2, STORE); + vlib_prefetch_buffer_header (b3, STORE); + + /* enqueue buffer */ + to_next[0] = bi0 = buffers[0]; + to_next[1] = bi1 = buffers[1]; + to_next[2] = bi2 = buffers[2]; + to_next[3] = bi3 = buffers[3]; + to_next += 4; + n_left_to_next -= 4; + buffers += 4; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + b2 = vlib_get_buffer (vm, bi2); + b3 = vlib_get_buffer (vm, bi3); + + vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; + vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index; + vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0; + vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index; + vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0; + vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index; + vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0; + + if (mode == MEMIF_INTERFACE_MODE_IP) + { + next0 = memif_next_from_ip_hdr (node, b0); + next1 = memif_next_from_ip_hdr (node, b1); + next2 = memif_next_from_ip_hdr (node, b2); + next3 = memif_next_from_ip_hdr (node, b3); + } + else if (mode == MEMIF_INTERFACE_MODE_ETHERNET) { - /* b0 */ - memif_input_trace_t *tr; - vlib_trace_buffer (vm, node, next0, b0, - /* follow_chain */ 0); - vlib_set_trace_count (vm, node, --n_trace); - tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); - tr->next_index = next0; - tr->hw_if_index = mif->hw_if_index; - tr->ring = rid; - - if (n_trace) + if (PREDICT_FALSE (mif->per_interface_next_index != ~0)) + { + next0 = mif->per_interface_next_index; + next1 = mif->per_interface_next_index; + next2 = mif->per_interface_next_index; + next3 = mif->per_interface_next_index; + } + else { - /* b1 */ - memif_input_trace_t *tr; - vlib_trace_buffer (vm, node, next1, b1, - /* follow_chain */ 0); - vlib_set_trace_count (vm, node, --n_trace); - tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); - tr->next_index = next1; - tr->hw_if_index = mif->hw_if_index; - tr->ring = rid; + next0 = next1 = next2 = next3 = next_index; + /* redirect if feature path enabled */ + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next0, b0); + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next1, b1); + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next2, b2); + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next3, b3); } } - /* redirect if feature path enabled */ - vnet_feature_start_device_input_x2 (mif->sw_if_index, - &next0, &next1, b0, b1); + /* trace */ + if (PREDICT_FALSE (n_trace > 0)) + { + memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace); + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace); + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace); + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace); + } /* enqueue */ - vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, - n_left_to_next, - bi0, bi1, next0, next1); + vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, + n_left_to_next, bi0, bi1, bi2, bi3, + next0, next1, next2, next3); - /* next packet */ - num_slots -= 2; - n_rx_packets += 2; - n_rx_bytes += b0->current_length; - n_rx_bytes += b1->current_length; + /* next */ + n_from -= 4; } - while (num_slots && n_left_to_next) + while (n_from && n_left_to_next) { - /* get empty buffer */ - u32 last_buf = vec_len (nm->rx_buffers[thread_index]) - 1; - bi0 = nm->rx_buffers[thread_index][last_buf]; - _vec_len (nm->rx_buffers[thread_index]) = last_buf; - /* enqueue buffer */ - to_next[0] = bi0; + to_next[0] = bi0 = buffers[0]; to_next += 1; n_left_to_next--; + buffers += 1; - /* fill buffer metadata */ b0 = vlib_get_buffer (vm, bi0); - b0->current_length = ring->desc[rd->last_head].length; vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - - /* copy buffer */ - mb0 = memif_get_buffer (mif, ring, rd->last_head); - clib_memcpy (vlib_buffer_get_current (b0), mb0, - CLIB_CACHE_LINE_BYTES); - if (b0->current_length > CLIB_CACHE_LINE_BYTES) - clib_memcpy (vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES, - mb0 + CLIB_CACHE_LINE_BYTES, - b0->current_length - CLIB_CACHE_LINE_BYTES); - - /* trace */ - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; - if (PREDICT_FALSE (n_trace > 0)) + if (mode == MEMIF_INTERFACE_MODE_IP) { - memif_input_trace_t *tr; - vlib_trace_buffer (vm, node, next0, b0, - /* follow_chain */ 0); - vlib_set_trace_count (vm, node, --n_trace); - tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); - tr->next_index = next0; - tr->hw_if_index = mif->hw_if_index; - tr->ring = rid; + next0 = memif_next_from_ip_hdr (node, b0); + } + else if (mode == MEMIF_INTERFACE_MODE_ETHERNET) + { + if (PREDICT_FALSE (mif->per_interface_next_index != ~0)) + next0 = mif->per_interface_next_index; + else + { + next0 = next_index; + /* redirect if feature path enabled */ + vnet_feature_start_device_input_x1 (mif->sw_if_index, + &next0, b0); + } } - - /* redirect if feature path enabled */ - vnet_feature_start_device_input_x1 (mif->sw_if_index, &next0, b0); + /* trace */ + if (PREDICT_FALSE (n_trace > 0)) + memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace); /* enqueue */ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); - /* next packet */ - rd->last_head = (rd->last_head + 1) & mask; - num_slots--; - n_rx_packets++; - n_rx_bytes += b0->current_length; + /* next */ + n_from--; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - CLIB_MEMORY_STORE_BARRIER (); - ring->tail = head; vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, thread_index, mif->hw_if_index, n_rx_packets, n_rx_bytes); + /* refill ring with empty buffers */ +refill: + vec_reset_length (ptd->buffers); + + head = ring->head; + n_slots = ring_size - head + mq->last_tail; + + if (n_slots < 32) + goto done; + + memif_desc_t *dt = &ptd->desc_template; + memset (dt, 0, sizeof (memif_desc_t)); + dt->length = buffer_length; + + n_alloc = vlib_buffer_alloc_to_ring (vm, mq->buffers, head & mask, + ring_size, n_slots); + + if (PREDICT_FALSE (n_alloc != n_slots)) + { + vlib_error_count (vm, node->node_index, + MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1); + } + + while (n_alloc >= 32) + { + bi0 = mq->buffers[(head + 4) & mask]; + vlib_prefetch_buffer_with_index (vm, bi0, LOAD); + bi1 = mq->buffers[(head + 5) & mask]; + vlib_prefetch_buffer_with_index (vm, bi1, LOAD); + bi2 = mq->buffers[(head + 6) & mask]; + vlib_prefetch_buffer_with_index (vm, bi2, LOAD); + bi3 = mq->buffers[(head + 7) & mask]; + vlib_prefetch_buffer_with_index (vm, bi3, LOAD); + + s0 = head++ & mask; + s1 = head++ & mask; + s2 = head++ & mask; + s3 = head++ & mask; + + d0 = &ring->desc[s0]; + d1 = &ring->desc[s1]; + d2 = &ring->desc[s2]; + d3 = &ring->desc[s3]; + + clib_memcpy (d0, dt, sizeof (memif_desc_t)); + clib_memcpy (d1, dt, sizeof (memif_desc_t)); + clib_memcpy (d2, dt, sizeof (memif_desc_t)); + clib_memcpy (d3, dt, sizeof (memif_desc_t)); + + b0 = vlib_get_buffer (vm, mq->buffers[s0]); + b1 = vlib_get_buffer (vm, mq->buffers[s1]); + b2 = vlib_get_buffer (vm, mq->buffers[s2]); + b3 = vlib_get_buffer (vm, mq->buffers[s3]); + + d0->region = b0->buffer_pool_index + 1; + d1->region = b1->buffer_pool_index + 1; + d2->region = b2->buffer_pool_index + 1; + d3->region = b3->buffer_pool_index + 1; + + d0->offset = + (void *) b0->data - mif->regions[d0->region].shm + start_offset; + d1->offset = + (void *) b1->data - mif->regions[d1->region].shm + start_offset; + d2->offset = + (void *) b2->data - mif->regions[d2->region].shm + start_offset; + d3->offset = + (void *) b3->data - mif->regions[d3->region].shm + start_offset; + + n_alloc -= 4; + } + while (n_alloc) + { + s0 = head++ & mask; + d0 = &ring->desc[s0]; + clib_memcpy (d0, dt, sizeof (memif_desc_t)); + b0 = vlib_get_buffer (vm, mq->buffers[s0]); + d0->region = b0->buffer_pool_index + 1; + d0->offset = + (void *) b0->data - mif->regions[d0->region].shm + start_offset; + + n_alloc -= 1; + } + + CLIB_MEMORY_STORE_BARRIER (); + ring->head = head; + +done: return n_rx_packets; } -static uword -memif_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * frame) + +VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - u32 n_rx_packets = 0; - memif_main_t *nm = &memif_main; - memif_if_t *mif; + u32 n_rx = 0; + memif_main_t *mm = &memif_main; vnet_device_input_runtime_t *rt = (void *) node->runtime_data; vnet_device_and_queue_t *dq; - memif_ring_type_t type; + memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP; + memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET; foreach_device_and_queue (dq, rt->devices_and_queues) { - mif = vec_elt_at_index (nm->interfaces, dq->dev_instance); + memif_if_t *mif; + mif = vec_elt_at_index (mm->interfaces, dq->dev_instance); if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) && (mif->flags & MEMIF_IF_FLAG_CONNECTED)) { - if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE) - type = MEMIF_RING_M2S; + if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY) + { + if (mif->mode == MEMIF_INTERFACE_MODE_IP) + n_rx += memif_device_input_zc_inline (vm, node, frame, mif, + dq->queue_id, mode_ip); + else + n_rx += memif_device_input_zc_inline (vm, node, frame, mif, + dq->queue_id, mode_eth); + } + else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE) + { + if (mif->mode == MEMIF_INTERFACE_MODE_IP) + n_rx += memif_device_input_inline (vm, node, frame, mif, + MEMIF_RING_M2S, dq->queue_id, + mode_ip); + else + n_rx += memif_device_input_inline (vm, node, frame, mif, + MEMIF_RING_M2S, dq->queue_id, + mode_eth); + } else - type = MEMIF_RING_S2M; - n_rx_packets += - memif_device_input_inline (vm, node, frame, mif, type, - dq->queue_id); + { + if (mif->mode == MEMIF_INTERFACE_MODE_IP) + n_rx += memif_device_input_inline (vm, node, frame, mif, + MEMIF_RING_S2M, dq->queue_id, + mode_ip); + else + n_rx += memif_device_input_inline (vm, node, frame, mif, + MEMIF_RING_S2M, dq->queue_id, + mode_eth); + } } } - return n_rx_packets; + return n_rx; } +#ifndef CLIB_MARCH_VARIANT /* *INDENT-OFF* */ VLIB_REGISTER_NODE (memif_input_node) = { - .function = memif_input_fn, .name = "memif-input", .sibling_of = "device-input", .format_trace = format_memif_input_trace, @@ -362,8 +921,8 @@ VLIB_REGISTER_NODE (memif_input_node) = { .n_errors = MEMIF_INPUT_N_ERROR, .error_strings = memif_input_error_strings, }; +#endif -VLIB_NODE_FUNCTION_MULTIARCH (memif_input_node, memif_input_fn) /* *INDENT-ON* */