2 *------------------------------------------------------------------
3 * Copyright (c) 2016 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
21 #include <sys/ioctl.h>
24 #include <vlib/vlib.h>
25 #include <vlib/unix/unix.h>
26 #include <vnet/ethernet/ethernet.h>
28 #include <memif/memif.h>
29 #include <memif/private.h>
31 #define foreach_memif_tx_func_error \
32 _(NO_FREE_SLOTS, "no free tx slots") \
33 _(ROLLBACK, "no enough space in tx buffers")
37 #define _(f,s) MEMIF_TX_ERROR_##f,
38 foreach_memif_tx_func_error
41 } memif_tx_func_error_t;
43 static __clib_unused char *memif_tx_func_error_strings[] = {
45 foreach_memif_tx_func_error
49 #ifndef CLIB_MULTIARCH_VARIANT
51 format_memif_device_name (u8 * s, va_list * args)
53 u32 dev_instance = va_arg (*args, u32);
54 memif_main_t *mm = &memif_main;
55 memif_if_t *mif = pool_elt_at_index (mm->interfaces, dev_instance);
56 memif_socket_file_t *msf;
58 msf = pool_elt_at_index (mm->socket_files, mif->socket_file_index);
59 s = format (s, "memif%lu/%lu", msf->socket_id, mif->id);
64 static __clib_unused u8 *
65 format_memif_device (u8 * s, va_list * args)
67 u32 dev_instance = va_arg (*args, u32);
68 int verbose = va_arg (*args, int);
69 u32 indent = format_get_indent (s);
71 s = format (s, "MEMIF interface");
74 s = format (s, "\n%U instance %u", format_white_space, indent + 2,
80 static __clib_unused u8 *
81 format_memif_tx_trace (u8 * s, va_list * args)
83 s = format (s, "Unimplemented...");
87 static_always_inline void
88 memif_add_copy_op (memif_per_thread_data_t * ptd, void *data, u32 len,
89 u16 buffer_offset, u16 buffer_vec_index)
92 vec_add2_aligned (ptd->copy_ops, co, 1, CLIB_CACHE_LINE_BYTES);
95 co->buffer_offset = buffer_offset;
96 co->buffer_vec_index = buffer_vec_index;
99 static_always_inline uword
100 memif_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
101 vlib_frame_t * frame, memif_if_t * mif,
102 memif_ring_type_t type)
106 u32 *buffers = vlib_frame_args (frame);
107 u32 n_left = frame->n_vectors;
109 u16 ring_size, mask, slot, free_slots;
110 u32 thread_index = vlib_get_thread_index ();
111 memif_per_thread_data_t *ptd = vec_elt_at_index (memif_main.per_thread_data,
113 u8 tx_queues = vec_len (mif->tx_queues);
116 vlib_buffer_t *b0, *b1, *b2, *b3;
118 memif_region_index_t last_region = ~0;
119 void *last_region_shm = 0;
121 if (tx_queues < vec_len (vlib_mains))
123 ASSERT (tx_queues > 0);
124 qid = thread_index % tx_queues;
125 clib_spinlock_lock_if_init (&mif->lockp);
130 mq = vec_elt_at_index (mif->tx_queues, qid);
132 ring_size = 1 << mq->log2_ring_size;
133 mask = ring_size - 1;
137 free_slots = ring->tail - mq->last_tail;
138 mq->last_tail += free_slots;
139 slot = (type == MEMIF_RING_S2M) ? ring->head : ring->tail;
141 if (type == MEMIF_RING_S2M)
142 free_slots = ring_size - ring->head + mq->last_tail;
144 free_slots = ring->head - ring->tail;
146 while (n_left && free_slots)
151 u32 bi0, dst_off, src_left, dst_left, bytes_to_copy;
152 u32 saved_ptd_copy_ops_len = _vec_len (ptd->copy_ops);
153 u32 saved_ptd_buffers_len = _vec_len (ptd->buffers);
154 u16 saved_slot = slot;
156 CLIB_PREFETCH (&ring->desc[(slot + 8) & mask], CLIB_CACHE_LINE_BYTES,
159 d0 = &ring->desc[slot & mask];
160 if (PREDICT_FALSE (last_region != d0->region))
162 last_region_shm = mif->regions[d0->region].shm;
163 last_region = d0->region;
165 mb0 = last_region_shm + d0->offset;
169 /* slave is the producer, so it should be able to reset buffer length */
170 dst_left = (type == MEMIF_RING_S2M) ? mif->run.buffer_size : d0->length;
172 if (PREDICT_TRUE (n_left >= 4))
173 vlib_prefetch_buffer_header (vlib_get_buffer (vm, buffers[3]), LOAD);
178 b0 = vlib_get_buffer (vm, bi0);
179 src_off = b0->current_data;
180 src_left = b0->current_length;
184 if (PREDICT_FALSE (dst_left == 0))
190 d0->flags = MEMIF_DESC_FLAG_NEXT;
191 d0 = &ring->desc[slot & mask];
195 MEMIF_RING_S2M) ? mif->run.buffer_size : d0->length;
197 if (PREDICT_FALSE (last_region != d0->region))
199 last_region_shm = mif->regions[d0->region].shm;
200 last_region = d0->region;
202 mb0 = last_region_shm + d0->offset;
206 /* we need to rollback vectors before bailing out */
207 _vec_len (ptd->buffers) = saved_ptd_buffers_len;
208 _vec_len (ptd->copy_ops) = saved_ptd_copy_ops_len;
209 vlib_error_count (vm, node->node_index,
210 MEMIF_TX_ERROR_ROLLBACK, 1);
215 bytes_to_copy = clib_min (src_left, dst_left);
216 memif_add_copy_op (ptd, mb0 + dst_off, bytes_to_copy, src_off,
217 vec_len (ptd->buffers));
218 vec_add1_aligned (ptd->buffers, bi0, CLIB_CACHE_LINE_BYTES);
219 src_off += bytes_to_copy;
220 dst_off += bytes_to_copy;
221 src_left -= bytes_to_copy;
222 dst_left -= bytes_to_copy;
225 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
227 bi0 = b0->next_buffer;
231 d0->length = dst_off;
243 n_copy_op = vec_len (ptd->copy_ops);
245 while (n_copy_op >= 8)
247 CLIB_PREFETCH (co[4].data, CLIB_CACHE_LINE_BYTES, LOAD);
248 CLIB_PREFETCH (co[5].data, CLIB_CACHE_LINE_BYTES, LOAD);
249 CLIB_PREFETCH (co[6].data, CLIB_CACHE_LINE_BYTES, LOAD);
250 CLIB_PREFETCH (co[7].data, CLIB_CACHE_LINE_BYTES, LOAD);
252 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
253 b1 = vlib_get_buffer (vm, ptd->buffers[co[1].buffer_vec_index]);
254 b2 = vlib_get_buffer (vm, ptd->buffers[co[2].buffer_vec_index]);
255 b3 = vlib_get_buffer (vm, ptd->buffers[co[3].buffer_vec_index]);
257 clib_memcpy (co[0].data, b0->data + co[0].buffer_offset,
259 clib_memcpy (co[1].data, b1->data + co[1].buffer_offset,
261 clib_memcpy (co[2].data, b2->data + co[2].buffer_offset,
263 clib_memcpy (co[3].data, b3->data + co[3].buffer_offset,
271 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
272 clib_memcpy (co[0].data, b0->data + co[0].buffer_offset,
278 vec_reset_length (ptd->copy_ops);
279 vec_reset_length (ptd->buffers);
281 CLIB_MEMORY_STORE_BARRIER ();
282 if (type == MEMIF_RING_S2M)
287 if (n_left && n_retries--)
290 clib_spinlock_unlock_if_init (&mif->lockp);
294 vlib_error_count (vm, node->node_index, MEMIF_TX_ERROR_NO_FREE_SLOTS,
298 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0 && mq->int_fd > -1)
301 CLIB_UNUSED (int r) = write (mq->int_fd, &b, sizeof (b));
305 vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
307 return frame->n_vectors;
311 CLIB_MULTIARCH_FN (memif_interface_tx) (vlib_main_t * vm,
312 vlib_node_runtime_t * node,
313 vlib_frame_t * frame)
315 memif_main_t *nm = &memif_main;
316 vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
317 memif_if_t *mif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
319 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
320 return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_S2M);
322 return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_M2S);
325 static __clib_unused void
326 memif_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
329 memif_main_t *apm = &memif_main;
330 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
331 memif_if_t *mif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
333 /* Shut off redirection */
334 if (node_index == ~0)
336 mif->per_interface_next_index = node_index;
340 mif->per_interface_next_index =
341 vlib_node_add_next (vlib_get_main (), memif_input_node.index, node_index);
344 static __clib_unused void
345 memif_clear_hw_interface_counters (u32 instance)
347 /* Nothing for now */
350 static __clib_unused clib_error_t *
351 memif_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
352 vnet_hw_interface_rx_mode mode)
354 memif_main_t *mm = &memif_main;
355 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
356 memif_if_t *mif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
357 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
359 if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
360 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
362 mq->ring->flags &= ~MEMIF_RING_FLAG_MASK_INT;
367 static __clib_unused clib_error_t *
368 memif_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
370 memif_main_t *mm = &memif_main;
371 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
372 memif_if_t *mif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
373 static clib_error_t *error = 0;
375 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
376 mif->flags |= MEMIF_IF_FLAG_ADMIN_UP;
378 mif->flags &= ~MEMIF_IF_FLAG_ADMIN_UP;
383 static __clib_unused clib_error_t *
384 memif_subif_add_del_function (vnet_main_t * vnm,
386 struct vnet_sw_interface_t *st, int is_add)
388 /* Nothing for now */
392 #ifndef CLIB_MULTIARCH_VARIANT
394 VNET_DEVICE_CLASS (memif_device_class) = {
396 .tx_function = memif_interface_tx,
397 .format_device_name = format_memif_device_name,
398 .format_device = format_memif_device,
399 .format_tx_trace = format_memif_tx_trace,
400 .tx_function_n_errors = MEMIF_TX_N_ERROR,
401 .tx_function_error_strings = memif_tx_func_error_strings,
402 .rx_redirect_to_node = memif_set_interface_next_node,
403 .clear_counters = memif_clear_hw_interface_counters,
404 .admin_up_down_function = memif_interface_admin_up_down,
405 .subif_add_del_function = memif_subif_add_del_function,
406 .rx_mode_change_function = memif_interface_rx_mode_change,
410 vlib_node_function_t __clib_weak memif_interface_tx_avx512;
411 vlib_node_function_t __clib_weak memif_interface_tx_avx2;
412 static void __clib_constructor
413 dpdk_interface_tx_multiarch_select (void)
415 if (memif_interface_tx_avx512 && clib_cpu_supports_avx512f ())
416 memif_device_class.tx_function = memif_interface_tx_avx512;
417 else if (memif_interface_tx_avx2 && clib_cpu_supports_avx2 ())
418 memif_device_class.tx_function = memif_interface_tx_avx2;
426 * fd.io coding-style-patch-verification: ON
429 * eval: (c-set-style "gnu")