diff options
Diffstat (limited to 'src/vnet/session/session_node.c')
| -rw-r--r-- | src/vnet/session/session_node.c | 171 |
1 files changed, 151 insertions, 20 deletions
diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c index 510ffa2617f..1908a58f08f 100644 --- a/src/vnet/session/session_node.c +++ b/src/vnet/session/session_node.c @@ -899,13 +899,111 @@ session_tx_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_set_trace_count (vm, node, n_trace); } +always_inline int +session_tx_fill_dma_transfers (session_worker_t *wrk, + session_tx_context_t *ctx, vlib_buffer_t *b) +{ + vlib_main_t *vm = wrk->vm; + u32 len_to_deq; + u8 *data0 = NULL; + int n_bytes_read, len_write; + svm_fifo_seg_t data_fs[2]; + + u32 n_segs = 2; + u16 n_transfers = 0; + /* + * Start with the first buffer in chain + */ + b->error = 0; + b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED; + b->current_data = 0; + data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN); + len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf); + + n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset, + data_fs, &n_segs, len_to_deq); + + len_write = n_bytes_read; + ASSERT (n_bytes_read == len_to_deq); + + while (n_bytes_read) + { + wrk->batch_num++; + vlib_dma_batch_add (vm, wrk->batch, data0, data_fs[n_transfers].data, + data_fs[n_transfers].len); + data0 += data_fs[n_transfers].len; + n_bytes_read -= data_fs[n_transfers].len; + n_transfers++; + } + return len_write; +} + +always_inline int +session_tx_fill_dma_transfers_tail (session_worker_t *wrk, + session_tx_context_t *ctx, + vlib_buffer_t *b, u32 len_to_deq, u8 *data) +{ + vlib_main_t *vm = wrk->vm; + int n_bytes_read, len_write; + svm_fifo_seg_t data_fs[2]; + u32 n_segs = 2; + u16 n_transfers = 0; + + n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset, + data_fs, &n_segs, len_to_deq); + + len_write = n_bytes_read; + + ASSERT (n_bytes_read == len_to_deq); + + while (n_bytes_read) + { + wrk->batch_num++; + vlib_dma_batch_add (vm, wrk->batch, data, data_fs[n_transfers].data, + data_fs[n_transfers].len); + data += data_fs[n_transfers].len; + n_bytes_read -= data_fs[n_transfers].len; + n_transfers++; + } + + return len_write; +} + +always_inline int +session_tx_copy_data (session_worker_t *wrk, session_tx_context_t *ctx, + vlib_buffer_t *b, u32 len_to_deq, u8 *data0) +{ + int n_bytes_read; + if (PREDICT_TRUE (!wrk->dma_enabled)) + n_bytes_read = + svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data0); + else + n_bytes_read = session_tx_fill_dma_transfers (wrk, ctx, b); + return n_bytes_read; +} + +always_inline int +session_tx_copy_data_tail (session_worker_t *wrk, session_tx_context_t *ctx, + vlib_buffer_t *b, u32 len_to_deq, u8 *data) +{ + int n_bytes_read; + if (PREDICT_TRUE (!wrk->dma_enabled)) + n_bytes_read = + svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data); + else + n_bytes_read = + session_tx_fill_dma_transfers_tail (wrk, ctx, b, len_to_deq, data); + return n_bytes_read; +} + always_inline void -session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx, - vlib_buffer_t * b, u16 * n_bufs, u8 peek_data) +session_tx_fifo_chain_tail (session_worker_t *wrk, session_tx_context_t *ctx, + vlib_buffer_t *b, u16 *n_bufs, u8 peek_data) { + vlib_main_t *vm = wrk->vm; vlib_buffer_t *chain_b, *prev_b; u32 chain_bi0, to_deq, left_from_seg; - u16 len_to_deq, n_bytes_read; + int len_to_deq, n_bytes_read; u8 *data, j; b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; @@ -927,8 +1025,8 @@ session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx, data = vlib_buffer_get_current (chain_b); if (peek_data) { - n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, - ctx->sp.tx_offset, len_to_deq, data); + n_bytes_read = + session_tx_copy_data_tail (wrk, ctx, b, len_to_deq, data); ctx->sp.tx_offset += n_bytes_read; } else @@ -985,13 +1083,12 @@ session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx, } always_inline void -session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx, - vlib_buffer_t * b, u16 * n_bufs, u8 peek_data) +session_tx_fill_buffer (session_worker_t *wrk, session_tx_context_t *ctx, + vlib_buffer_t *b, u16 *n_bufs, u8 peek_data) { u32 len_to_deq; u8 *data0; int n_bytes_read; - /* * Start with the first buffer in chain */ @@ -1004,8 +1101,7 @@ session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx, if (peek_data) { - n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, - len_to_deq, data0); + n_bytes_read = session_tx_copy_data (wrk, ctx, b, len_to_deq, data0); ASSERT (n_bytes_read > 0); /* Keep track of progress locally, transport is also supposed to * increment it independently when pushing the header */ @@ -1052,6 +1148,7 @@ session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx, ASSERT (n_bytes_read > 0); } } + b->current_length = n_bytes_read; ctx->left_to_snd -= n_bytes_read; @@ -1059,7 +1156,7 @@ session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx, * Fill in the remaining buffers in the chain, if any */ if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd)) - session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data); + session_tx_fifo_chain_tail (wrk, ctx, b, n_bufs, peek_data); } always_inline u8 @@ -1252,6 +1349,22 @@ session_tx_maybe_reschedule (session_worker_t * wrk, } } +always_inline void +session_tx_add_pending_buffer (session_worker_t *wrk, u32 bi, u32 next_index) +{ + if (PREDICT_TRUE (!wrk->dma_enabled)) + { + vec_add1 (wrk->pending_tx_buffers, bi); + vec_add1 (wrk->pending_tx_nexts, next_index); + } + else + { + session_dma_transfer *dma_transfer = &wrk->dma_trans[wrk->trans_tail]; + vec_add1 (dma_transfer->pending_tx_buffers, bi); + vec_add1 (dma_transfer->pending_tx_nexts, next_index); + } +} + always_inline int session_tx_fifo_read_and_snd_i (session_worker_t * wrk, vlib_node_runtime_t * node, @@ -1393,17 +1506,15 @@ session_tx_fifo_read_and_snd_i (session_worker_t * wrk, b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); - session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data); - session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data); + session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data); + session_tx_fill_buffer (wrk, ctx, b1, &n_bufs, peek_data); ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0; ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left + 1] = b1; n_left -= 2; - vec_add1 (wrk->pending_tx_buffers, bi0); - vec_add1 (wrk->pending_tx_buffers, bi1); - vec_add1 (wrk->pending_tx_nexts, next_index); - vec_add1 (wrk->pending_tx_nexts, next_index); + session_tx_add_pending_buffer (wrk, bi0, next_index); + session_tx_add_pending_buffer (wrk, bi1, next_index); } while (n_left) { @@ -1419,13 +1530,12 @@ session_tx_fifo_read_and_snd_i (session_worker_t * wrk, bi0 = ctx->tx_buffers[--n_bufs]; b0 = vlib_get_buffer (vm, bi0); - session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data); + session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data); ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0; n_left -= 1; - vec_add1 (wrk->pending_tx_buffers, bi0); - vec_add1 (wrk->pending_tx_nexts, next_index); + session_tx_add_pending_buffer (wrk, bi0, next_index); } /* Ask transport to push headers */ @@ -1825,6 +1935,13 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, n_tx_packets = vec_len (wrk->pending_tx_buffers); SESSION_EVT (SESSION_EVT_DSP_CNTRS, UPDATE_TIME, wrk); + if (PREDICT_FALSE (wrk->dma_enabled)) + { + if (wrk->trans_head == ((wrk->trans_tail + 1) & (wrk->trans_size - 1))) + return 0; + wrk->batch = vlib_dma_batch_new (vm, wrk->config_index); + } + /* * Dequeue new internal mq events */ @@ -1894,6 +2011,20 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, }; } + if (PREDICT_FALSE (wrk->dma_enabled)) + { + if (wrk->batch_num) + { + vlib_dma_batch_set_cookie (vm, wrk->batch, wrk->trans_tail); + wrk->batch_num = 0; + wrk->trans_tail++; + if (wrk->trans_tail == wrk->trans_size) + wrk->trans_tail = 0; + } + + vlib_dma_batch_submit (vm, wrk->batch); + } + SESSION_EVT (SESSION_EVT_DSP_CNTRS, OLD_IO_EVTS, wrk); if (vec_len (wrk->pending_tx_buffers)) |