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-rw-r--r--src/plugins/dev_octeon/rx_node.c385
1 files changed, 385 insertions, 0 deletions
diff --git a/src/plugins/dev_octeon/rx_node.c b/src/plugins/dev_octeon/rx_node.c
new file mode 100644
index 00000000000..c1c4771795e
--- /dev/null
+++ b/src/plugins/dev_octeon/rx_node.c
@@ -0,0 +1,385 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2023 Cisco Systems, Inc.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/dev/dev.h>
+#include <vnet/ethernet/ethernet.h>
+#include <dev_octeon/octeon.h>
+#include <dev_octeon/hw_defs.h>
+
+typedef struct
+{
+ u32 next_index;
+ u32 sw_if_index;
+ u32 hw_if_index;
+ u32 trace_count;
+ u32 n_traced;
+ oct_nix_rx_cqe_desc_t *next_desc;
+ u64 parse_w0_or;
+ u32 n_left_to_next;
+ u32 *to_next;
+ u32 n_rx_pkts;
+ u32 n_rx_bytes;
+ u32 n_segs;
+} oct_rx_node_ctx_t;
+
+static_always_inline vlib_buffer_t *
+oct_seg_to_bp (void *p)
+{
+ return (vlib_buffer_t *) p - 1;
+}
+
+static_always_inline void
+oct_rx_attach_tail (vlib_main_t *vm, oct_rx_node_ctx_t *ctx, vlib_buffer_t *h,
+ oct_nix_rx_cqe_desc_t *d)
+{
+ u32 tail_sz = 0, n_tail_segs = 0;
+ vlib_buffer_t *p, *b;
+ u8 segs0 = d->sg0.segs, segs1 = 0;
+
+ if (segs0 < 2)
+ return;
+
+ b = oct_seg_to_bp (d->segs0[1]);
+ h->next_buffer = vlib_get_buffer_index (vm, b);
+ tail_sz += b->current_length = d->sg0.seg2_size;
+ n_tail_segs++;
+
+ if (segs0 == 2)
+ goto done;
+
+ p = b;
+ p->flags = VLIB_BUFFER_NEXT_PRESENT;
+ b = oct_seg_to_bp (d->segs0[2]);
+ p->next_buffer = vlib_get_buffer_index (vm, b);
+ tail_sz += b->current_length = d->sg0.seg3_size;
+ n_tail_segs++;
+
+ if (d->sg1.subdc != NIX_SUBDC_SG)
+ goto done;
+
+ segs1 = d->sg1.segs;
+ if (segs1 == 0)
+ goto done;
+
+ p = b;
+ p->flags = VLIB_BUFFER_NEXT_PRESENT;
+ b = oct_seg_to_bp (d->segs1[0]);
+ p->next_buffer = vlib_get_buffer_index (vm, b);
+ tail_sz += b->current_length = d->sg1.seg1_size;
+ n_tail_segs++;
+
+ if (segs1 == 1)
+ goto done;
+
+ p = b;
+ p->flags = VLIB_BUFFER_NEXT_PRESENT;
+ b = oct_seg_to_bp (d->segs1[1]);
+ p->next_buffer = vlib_get_buffer_index (vm, b);
+ tail_sz += b->current_length = d->sg1.seg2_size;
+ n_tail_segs++;
+
+ if (segs1 == 2)
+ goto done;
+
+ p = b;
+ p->flags = VLIB_BUFFER_NEXT_PRESENT;
+ b = oct_seg_to_bp (d->segs1[2]);
+ p->next_buffer = vlib_get_buffer_index (vm, b);
+ tail_sz += b->current_length = d->sg1.seg3_size;
+ n_tail_segs++;
+
+done:
+ b->flags = 0;
+ h->total_length_not_including_first_buffer = tail_sz;
+ h->flags |= VLIB_BUFFER_NEXT_PRESENT | VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ ctx->n_rx_bytes += tail_sz;
+ ctx->n_segs += n_tail_segs;
+}
+
+static_always_inline u32
+oct_rx_batch (vlib_main_t *vm, oct_rx_node_ctx_t *ctx,
+ vnet_dev_rx_queue_t *rxq, u32 n)
+{
+ oct_rxq_t *crq = vnet_dev_get_rx_queue_data (rxq);
+ vlib_buffer_template_t bt = rxq->buffer_template;
+ u32 n_left;
+ oct_nix_rx_cqe_desc_t *d = ctx->next_desc;
+ vlib_buffer_t *b[4];
+
+ for (n_left = n; n_left >= 8; d += 4, n_left -= 4, ctx->to_next += 4)
+ {
+ u32 segs = 0;
+ clib_prefetch_store (oct_seg_to_bp (d[4].segs0[0]));
+ clib_prefetch_store (oct_seg_to_bp (d[5].segs0[0]));
+ b[0] = oct_seg_to_bp (d[0].segs0[0]);
+ clib_prefetch_store (oct_seg_to_bp (d[6].segs0[0]));
+ b[1] = oct_seg_to_bp (d[1].segs0[0]);
+ clib_prefetch_store (oct_seg_to_bp (d[7].segs0[0]));
+ b[2] = oct_seg_to_bp (d[2].segs0[0]);
+ b[3] = oct_seg_to_bp (d[3].segs0[0]);
+ ctx->to_next[0] = vlib_get_buffer_index (vm, b[0]);
+ ctx->to_next[1] = vlib_get_buffer_index (vm, b[1]);
+ ctx->to_next[2] = vlib_get_buffer_index (vm, b[2]);
+ ctx->to_next[3] = vlib_get_buffer_index (vm, b[3]);
+ b[0]->template = bt;
+ b[1]->template = bt;
+ b[2]->template = bt;
+ b[3]->template = bt;
+ ctx->n_rx_bytes += b[0]->current_length = d[0].sg0.seg1_size;
+ ctx->n_rx_bytes += b[1]->current_length = d[1].sg0.seg1_size;
+ ctx->n_rx_bytes += b[2]->current_length = d[2].sg0.seg1_size;
+ ctx->n_rx_bytes += b[3]->current_length = d[3].sg0.seg1_size;
+ ctx->n_segs += 4;
+ segs = d[0].sg0.segs + d[1].sg0.segs + d[2].sg0.segs + d[3].sg0.segs;
+
+ if (PREDICT_FALSE (segs > 4))
+ {
+ oct_rx_attach_tail (vm, ctx, b[0], d + 0);
+ oct_rx_attach_tail (vm, ctx, b[1], d + 1);
+ oct_rx_attach_tail (vm, ctx, b[2], d + 2);
+ oct_rx_attach_tail (vm, ctx, b[3], d + 3);
+ }
+ }
+
+ for (; n_left; d += 1, n_left -= 1, ctx->to_next += 1)
+ {
+ b[0] = (vlib_buffer_t *) d->segs0[0] - 1;
+ ctx->to_next[0] = vlib_get_buffer_index (vm, b[0]);
+ b[0]->template = bt;
+ ctx->n_rx_bytes += b[0]->current_length = d[0].sg0.seg1_size;
+ ctx->n_segs += 1;
+ if (d[0].sg0.segs > 1)
+ oct_rx_attach_tail (vm, ctx, b[0], d + 0);
+ }
+
+ plt_write64 ((crq->cq.wdata | n), crq->cq.door);
+ ctx->n_rx_pkts += n;
+ ctx->n_left_to_next -= n;
+ return n;
+}
+
+static_always_inline void
+oct_rxq_refill_batch (vlib_main_t *vm, u64 lmt_id, u64 addr,
+ oct_npa_lf_aura_batch_free_line_t *lines, u32 *bi,
+ oct_npa_lf_aura_batch_free0_t w0, u64 n_lines)
+{
+ u64 data;
+
+ for (u32 i = 0; i < n_lines; i++, bi += 15)
+ {
+ lines[i].w0 = w0;
+ vlib_get_buffers (vm, bi, (vlib_buffer_t **) lines[i].data, 15);
+ }
+
+ data = lmt_id | ((n_lines - 1) << 12) | ((1ULL << (n_lines * 3)) - 1) << 19;
+ roc_lmt_submit_steorl (data, addr);
+
+ /* Data Store Memory Barrier - outer shareable domain */
+ asm volatile("dmb oshst" ::: "memory");
+}
+
+static_always_inline u32
+oct_rxq_refill (vlib_main_t *vm, vnet_dev_rx_queue_t *rxq, u16 n_refill)
+{
+ const u32 batch_max_lines = 16;
+ const u32 bufs_per_line = 15;
+ const u32 batch_max_bufs = 15 * 16;
+
+ u32 batch_bufs, n_lines, n_alloc;
+ u32 buffer_indices[batch_max_bufs];
+ u64 lmt_addr, lmt_id, addr, n_enq = 0;
+ u8 bpi = vnet_dev_get_rx_queue_buffer_pool_index (rxq);
+ oct_rxq_t *crq = vnet_dev_get_rx_queue_data (rxq);
+ oct_npa_lf_aura_batch_free_line_t *lines;
+
+ if (n_refill < bufs_per_line)
+ return 0;
+
+ n_lines = n_refill / bufs_per_line;
+
+ addr = crq->aura_batch_free_ioaddr;
+ lmt_addr = crq->lmt_base_addr;
+ lmt_id = vm->thread_index << ROC_LMT_LINES_PER_CORE_LOG2;
+ lmt_addr += lmt_id << ROC_LMT_LINE_SIZE_LOG2;
+ lines = (oct_npa_lf_aura_batch_free_line_t *) lmt_addr;
+
+ oct_npa_lf_aura_batch_free0_t w0 = {
+ .aura = roc_npa_aura_handle_to_aura (crq->aura_handle),
+ .count_eot = 1,
+ };
+
+ while (n_lines >= batch_max_lines)
+ {
+ n_alloc = vlib_buffer_alloc (vm, buffer_indices, batch_max_bufs);
+ if (PREDICT_FALSE (n_alloc < batch_max_bufs))
+ goto alloc_fail;
+ oct_rxq_refill_batch (vm, lmt_id, addr, lines, buffer_indices, w0,
+ batch_max_lines);
+ n_lines -= batch_max_lines;
+ n_enq += batch_max_bufs;
+ }
+
+ if (n_lines == 0)
+ return n_enq;
+
+ batch_bufs = n_lines * bufs_per_line;
+ n_alloc = vlib_buffer_alloc_from_pool (vm, buffer_indices, batch_bufs, bpi);
+
+ if (PREDICT_FALSE (n_alloc < batch_bufs))
+ {
+ alloc_fail:
+ if (n_alloc >= bufs_per_line)
+ {
+ u32 n_unalloc;
+ n_lines = n_alloc / bufs_per_line;
+ batch_bufs = n_lines * bufs_per_line;
+ n_unalloc = n_alloc - batch_bufs;
+
+ if (n_unalloc)
+ vlib_buffer_unalloc_to_pool (vm, buffer_indices + batch_bufs,
+ n_unalloc, bpi);
+ }
+ else
+ {
+ if (n_alloc)
+ vlib_buffer_unalloc_to_pool (vm, buffer_indices, n_alloc, bpi);
+ return n_enq;
+ }
+ }
+
+ oct_rxq_refill_batch (vm, lmt_id, addr, lines, buffer_indices, w0, n_lines);
+ n_enq += batch_bufs;
+
+ return n_enq;
+}
+
+static_always_inline void
+oct_rx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
+ oct_rx_node_ctx_t *ctx, oct_nix_rx_cqe_desc_t *d, u32 n_desc)
+{
+ u32 i = 0;
+ if (PREDICT_TRUE (ctx->trace_count == 0))
+ return;
+
+ while (ctx->n_traced < ctx->trace_count && i < n_desc)
+ {
+ vlib_buffer_t *b = (vlib_buffer_t *) d[i].segs0[0] - 1;
+
+ if (PREDICT_TRUE (vlib_trace_buffer (vm, node, ctx->next_index, b,
+ /* follow_chain */ 0)))
+ {
+ oct_rx_trace_t *tr = vlib_add_trace (vm, node, b, sizeof (*tr));
+ tr->next_index = ctx->next_index;
+ tr->sw_if_index = ctx->sw_if_index;
+ tr->desc = d[i];
+ ctx->n_traced++;
+ }
+ i++;
+ }
+}
+
+static_always_inline uword
+oct_rx_node_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, vnet_dev_port_t *port,
+ vnet_dev_rx_queue_t *rxq, int with_flows)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 thr_idx = vlib_get_thread_index ();
+ oct_rxq_t *crq = vnet_dev_get_rx_queue_data (rxq);
+ u32 n_desc, head, n, n_enq;
+ u32 cq_size = crq->cq.nb_desc;
+ u32 cq_mask = crq->cq.qmask;
+ oct_nix_rx_cqe_desc_t *descs = crq->cq.desc_base;
+ oct_nix_lf_cq_op_status_t status;
+ oct_rx_node_ctx_t _ctx = {
+ .next_index = rxq->next_index,
+ .sw_if_index = port->intf.sw_if_index,
+ .hw_if_index = port->intf.hw_if_index,
+ }, *ctx = &_ctx;
+
+ /* get head and tail from NIX_LF_CQ_OP_STATUS */
+ status.as_u64 = roc_atomic64_add_sync (crq->cq.wdata, crq->cq.status);
+ if (status.cq_err || status.op_err)
+ return 0;
+
+ head = status.head;
+ n_desc = (status.tail - head) & cq_mask;
+
+ if (n_desc == 0)
+ return 0;
+
+ vlib_get_new_next_frame (vm, node, ctx->next_index, ctx->to_next,
+ ctx->n_left_to_next);
+
+ ctx->trace_count = vlib_get_trace_count (vm, node);
+
+ while (1)
+ {
+ ctx->next_desc = descs + head;
+ n = clib_min (cq_size - head, clib_min (n_desc, ctx->n_left_to_next));
+ n = oct_rx_batch (vm, ctx, rxq, n);
+ oct_rx_trace (vm, node, ctx, descs + head, n);
+
+ if (ctx->n_left_to_next == 0)
+ break;
+
+ status.as_u64 = roc_atomic64_add_sync (crq->cq.wdata, crq->cq.status);
+ if (status.cq_err || status.op_err)
+ break;
+
+ head = status.head;
+ n_desc = (status.tail - head) & cq_mask;
+ if (n_desc == 0)
+ break;
+ }
+
+ if (ctx->n_traced)
+ vlib_set_trace_count (vm, node, ctx->trace_count - ctx->n_traced);
+
+ if (PREDICT_TRUE (ctx->next_index == VNET_DEV_ETH_RX_PORT_NEXT_ETH_INPUT))
+ {
+ vlib_next_frame_t *nf;
+ vlib_frame_t *f;
+ ethernet_input_frame_t *ef;
+ oct_nix_rx_parse_t p = { .w[0] = ctx->parse_w0_or };
+ nf = vlib_node_runtime_get_next_frame (vm, node, ctx->next_index);
+ f = vlib_get_frame (vm, nf->frame);
+ f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
+
+ ef = vlib_frame_scalar_args (f);
+ ef->sw_if_index = ctx->sw_if_index;
+ ef->hw_if_index = ctx->hw_if_index;
+
+ if (p.f.errcode == 0 && p.f.errlev == 0)
+ f->flags |= ETH_INPUT_FRAME_F_IP4_CKSUM_OK;
+
+ vlib_frame_no_append (f);
+ }
+
+ vlib_put_next_frame (vm, node, ctx->next_index, ctx->n_left_to_next);
+
+ n_enq = crq->n_enq - ctx->n_segs;
+ n_enq += oct_rxq_refill (vm, rxq, rxq->size - n_enq);
+ crq->n_enq = n_enq;
+
+ vlib_increment_combined_counter (
+ vnm->interface_main.combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ thr_idx, ctx->hw_if_index, ctx->n_rx_pkts, ctx->n_rx_bytes);
+
+ return ctx->n_rx_pkts;
+}
+
+VNET_DEV_NODE_FN (oct_rx_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ u32 n_rx = 0;
+ foreach_vnet_dev_rx_queue_runtime (rxq, node)
+ {
+ vnet_dev_port_t *port = rxq->port;
+ n_rx += oct_rx_node_inline (vm, node, frame, port, rxq, 0);
+ }
+
+ return n_rx;
+}