1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2016 Intel Corporation
3 */
4
5 #include <stdint.h>
6 #include <string.h>
7 #include <stdio.h>
8 #include <errno.h>
9 #include <unistd.h>
10
11 #include <rte_ethdev_driver.h>
12 #include <rte_ethdev_pci.h>
13 #include <rte_memcpy.h>
14 #include <rte_string_fns.h>
15 #include <rte_memzone.h>
16 #include <rte_malloc.h>
17 #include <rte_branch_prediction.h>
18 #include <rte_pci.h>
19 #include <rte_bus_pci.h>
20 #include <rte_ether.h>
21 #include <rte_ip.h>
22 #include <rte_arp.h>
23 #include <rte_common.h>
24 #include <rte_errno.h>
25 #include <rte_cpuflags.h>
26 #include <rte_vect.h>
27
28 #include <rte_memory.h>
29 #include <rte_eal.h>
30 #include <rte_dev.h>
31 #include <rte_cycles.h>
32 #include <rte_kvargs.h>
33
34 #include "virtio_ethdev.h"
35 #include "virtio_pci.h"
36 #include "virtio_logs.h"
37 #include "virtqueue.h"
38 #include "virtio_rxtx.h"
39 #include "virtio_user/virtio_user_dev.h"
40
41 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
42 static int virtio_dev_configure(struct rte_eth_dev *dev);
43 static int virtio_dev_start(struct rte_eth_dev *dev);
44 static int virtio_dev_stop(struct rte_eth_dev *dev);
45 static int virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
46 static int virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
47 static int virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
48 static int virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
49 static uint32_t virtio_dev_speed_capa_get(uint32_t speed);
50 static int virtio_dev_devargs_parse(struct rte_devargs *devargs,
51 int *vdpa,
52 uint32_t *speed,
53 int *vectorized);
54 static int virtio_dev_info_get(struct rte_eth_dev *dev,
55 struct rte_eth_dev_info *dev_info);
56 static int virtio_dev_link_update(struct rte_eth_dev *dev,
57 int wait_to_complete);
58 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
59
60 static void virtio_set_hwaddr(struct virtio_hw *hw);
61 static void virtio_get_hwaddr(struct virtio_hw *hw);
62
63 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
64 struct rte_eth_stats *stats);
65 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
66 struct rte_eth_xstat *xstats, unsigned n);
67 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
68 struct rte_eth_xstat_name *xstats_names,
69 unsigned limit);
70 static int virtio_dev_stats_reset(struct rte_eth_dev *dev);
71 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
72 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
73 uint16_t vlan_id, int on);
74 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
75 struct rte_ether_addr *mac_addr,
76 uint32_t index, uint32_t vmdq);
77 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
78 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
79 struct rte_ether_addr *mac_addr);
80
81 static int virtio_intr_disable(struct rte_eth_dev *dev);
82
83 static int virtio_dev_queue_stats_mapping_set(
84 struct rte_eth_dev *eth_dev,
85 uint16_t queue_id,
86 uint8_t stat_idx,
87 uint8_t is_rx);
88
89 static void virtio_notify_peers(struct rte_eth_dev *dev);
90 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
91
92 /*
93 * The set of PCI devices this driver supports
94 */
95 static const struct rte_pci_id pci_id_virtio_map[] = {
96 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
97 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
98 { .vendor_id = 0, /* sentinel */ },
99 };
100
101 struct rte_virtio_xstats_name_off {
102 char name[RTE_ETH_XSTATS_NAME_SIZE];
103 unsigned offset;
104 };
105
106 /* [rt]x_qX_ is prepended to the name string here */
107 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
108 {"good_packets", offsetof(struct virtnet_rx, stats.packets)},
109 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)},
110 {"errors", offsetof(struct virtnet_rx, stats.errors)},
111 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)},
112 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)},
113 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])},
114 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])},
115 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])},
116 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])},
117 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])},
118 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])},
119 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
120 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])},
121 };
122
123 /* [rt]x_qX_ is prepended to the name string here */
124 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
125 {"good_packets", offsetof(struct virtnet_tx, stats.packets)},
126 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)},
127 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)},
128 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)},
129 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])},
130 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])},
131 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])},
132 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])},
133 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])},
134 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])},
135 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
136 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])},
137 };
138
139 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
140 sizeof(rte_virtio_rxq_stat_strings[0]))
141 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
142 sizeof(rte_virtio_txq_stat_strings[0]))
143
144 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
145
146 static struct virtio_pmd_ctrl *
virtio_send_command_packed(struct virtnet_ctl * cvq,struct virtio_pmd_ctrl * ctrl,int * dlen,int pkt_num)147 virtio_send_command_packed(struct virtnet_ctl *cvq,
148 struct virtio_pmd_ctrl *ctrl,
149 int *dlen, int pkt_num)
150 {
151 struct virtqueue *vq = cvq->vq;
152 int head;
153 struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
154 struct virtio_pmd_ctrl *result;
155 uint16_t flags;
156 int sum = 0;
157 int nb_descs = 0;
158 int k;
159
160 /*
161 * Format is enforced in qemu code:
162 * One TX packet for header;
163 * At least one TX packet per argument;
164 * One RX packet for ACK.
165 */
166 head = vq->vq_avail_idx;
167 flags = vq->vq_packed.cached_flags;
168 desc[head].addr = cvq->virtio_net_hdr_mem;
169 desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
170 vq->vq_free_cnt--;
171 nb_descs++;
172 if (++vq->vq_avail_idx >= vq->vq_nentries) {
173 vq->vq_avail_idx -= vq->vq_nentries;
174 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
175 }
176
177 for (k = 0; k < pkt_num; k++) {
178 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
179 + sizeof(struct virtio_net_ctrl_hdr)
180 + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
181 desc[vq->vq_avail_idx].len = dlen[k];
182 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
183 vq->vq_packed.cached_flags;
184 sum += dlen[k];
185 vq->vq_free_cnt--;
186 nb_descs++;
187 if (++vq->vq_avail_idx >= vq->vq_nentries) {
188 vq->vq_avail_idx -= vq->vq_nentries;
189 vq->vq_packed.cached_flags ^=
190 VRING_PACKED_DESC_F_AVAIL_USED;
191 }
192 }
193
194 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
195 + sizeof(struct virtio_net_ctrl_hdr);
196 desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
197 desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
198 vq->vq_packed.cached_flags;
199 vq->vq_free_cnt--;
200 nb_descs++;
201 if (++vq->vq_avail_idx >= vq->vq_nentries) {
202 vq->vq_avail_idx -= vq->vq_nentries;
203 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
204 }
205
206 virtio_wmb(vq->hw->weak_barriers);
207 desc[head].flags = VRING_DESC_F_NEXT | flags;
208
209 virtio_wmb(vq->hw->weak_barriers);
210 virtqueue_notify(vq);
211
212 /* wait for used descriptors in virtqueue */
213 while (!desc_is_used(&desc[head], vq))
214 usleep(100);
215
216 virtio_rmb(vq->hw->weak_barriers);
217
218 /* now get used descriptors */
219 vq->vq_free_cnt += nb_descs;
220 vq->vq_used_cons_idx += nb_descs;
221 if (vq->vq_used_cons_idx >= vq->vq_nentries) {
222 vq->vq_used_cons_idx -= vq->vq_nentries;
223 vq->vq_packed.used_wrap_counter ^= 1;
224 }
225
226 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
227 "vq->vq_avail_idx=%d\n"
228 "vq->vq_used_cons_idx=%d\n"
229 "vq->vq_packed.cached_flags=0x%x\n"
230 "vq->vq_packed.used_wrap_counter=%d\n",
231 vq->vq_free_cnt,
232 vq->vq_avail_idx,
233 vq->vq_used_cons_idx,
234 vq->vq_packed.cached_flags,
235 vq->vq_packed.used_wrap_counter);
236
237 result = cvq->virtio_net_hdr_mz->addr;
238 return result;
239 }
240
241 static struct virtio_pmd_ctrl *
virtio_send_command_split(struct virtnet_ctl * cvq,struct virtio_pmd_ctrl * ctrl,int * dlen,int pkt_num)242 virtio_send_command_split(struct virtnet_ctl *cvq,
243 struct virtio_pmd_ctrl *ctrl,
244 int *dlen, int pkt_num)
245 {
246 struct virtio_pmd_ctrl *result;
247 struct virtqueue *vq = cvq->vq;
248 uint32_t head, i;
249 int k, sum = 0;
250
251 head = vq->vq_desc_head_idx;
252
253 /*
254 * Format is enforced in qemu code:
255 * One TX packet for header;
256 * At least one TX packet per argument;
257 * One RX packet for ACK.
258 */
259 vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
260 vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
261 vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
262 vq->vq_free_cnt--;
263 i = vq->vq_split.ring.desc[head].next;
264
265 for (k = 0; k < pkt_num; k++) {
266 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
267 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
268 + sizeof(struct virtio_net_ctrl_hdr)
269 + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
270 vq->vq_split.ring.desc[i].len = dlen[k];
271 sum += dlen[k];
272 vq->vq_free_cnt--;
273 i = vq->vq_split.ring.desc[i].next;
274 }
275
276 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
277 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
278 + sizeof(struct virtio_net_ctrl_hdr);
279 vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
280 vq->vq_free_cnt--;
281
282 vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
283
284 vq_update_avail_ring(vq, head);
285 vq_update_avail_idx(vq);
286
287 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
288
289 virtqueue_notify(vq);
290
291 while (virtqueue_nused(vq) == 0)
292 usleep(100);
293
294 while (virtqueue_nused(vq)) {
295 uint32_t idx, desc_idx, used_idx;
296 struct vring_used_elem *uep;
297
298 used_idx = (uint32_t)(vq->vq_used_cons_idx
299 & (vq->vq_nentries - 1));
300 uep = &vq->vq_split.ring.used->ring[used_idx];
301 idx = (uint32_t) uep->id;
302 desc_idx = idx;
303
304 while (vq->vq_split.ring.desc[desc_idx].flags &
305 VRING_DESC_F_NEXT) {
306 desc_idx = vq->vq_split.ring.desc[desc_idx].next;
307 vq->vq_free_cnt++;
308 }
309
310 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
311 vq->vq_desc_head_idx = idx;
312
313 vq->vq_used_cons_idx++;
314 vq->vq_free_cnt++;
315 }
316
317 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
318 vq->vq_free_cnt, vq->vq_desc_head_idx);
319
320 result = cvq->virtio_net_hdr_mz->addr;
321 return result;
322 }
323
324 static int
virtio_send_command(struct virtnet_ctl * cvq,struct virtio_pmd_ctrl * ctrl,int * dlen,int pkt_num)325 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
326 int *dlen, int pkt_num)
327 {
328 virtio_net_ctrl_ack status = ~0;
329 struct virtio_pmd_ctrl *result;
330 struct virtqueue *vq;
331
332 ctrl->status = status;
333
334 if (!cvq || !cvq->vq) {
335 PMD_INIT_LOG(ERR, "Control queue is not supported.");
336 return -1;
337 }
338
339 rte_spinlock_lock(&cvq->lock);
340 vq = cvq->vq;
341
342 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
343 "vq->hw->cvq = %p vq = %p",
344 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
345
346 if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
347 rte_spinlock_unlock(&cvq->lock);
348 return -1;
349 }
350
351 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
352 sizeof(struct virtio_pmd_ctrl));
353
354 if (vtpci_packed_queue(vq->hw))
355 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
356 else
357 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
358
359 rte_spinlock_unlock(&cvq->lock);
360 return result->status;
361 }
362
363 static int
virtio_set_multiple_queues(struct rte_eth_dev * dev,uint16_t nb_queues)364 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
365 {
366 struct virtio_hw *hw = dev->data->dev_private;
367 struct virtio_pmd_ctrl ctrl;
368 int dlen[1];
369 int ret;
370
371 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
372 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
373 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
374
375 dlen[0] = sizeof(uint16_t);
376
377 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
378 if (ret) {
379 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
380 "failed, this is too late now...");
381 return -EINVAL;
382 }
383
384 return 0;
385 }
386
387 static void
virtio_dev_queue_release(void * queue __rte_unused)388 virtio_dev_queue_release(void *queue __rte_unused)
389 {
390 /* do nothing */
391 }
392
393 static uint16_t
virtio_get_nr_vq(struct virtio_hw * hw)394 virtio_get_nr_vq(struct virtio_hw *hw)
395 {
396 uint16_t nr_vq = hw->max_queue_pairs * 2;
397
398 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
399 nr_vq += 1;
400
401 return nr_vq;
402 }
403
404 static void
virtio_init_vring(struct virtqueue * vq)405 virtio_init_vring(struct virtqueue *vq)
406 {
407 int size = vq->vq_nentries;
408 uint8_t *ring_mem = vq->vq_ring_virt_mem;
409
410 PMD_INIT_FUNC_TRACE();
411
412 memset(ring_mem, 0, vq->vq_ring_size);
413
414 vq->vq_used_cons_idx = 0;
415 vq->vq_desc_head_idx = 0;
416 vq->vq_avail_idx = 0;
417 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
418 vq->vq_free_cnt = vq->vq_nentries;
419 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
420 if (vtpci_packed_queue(vq->hw)) {
421 vring_init_packed(&vq->vq_packed.ring, ring_mem,
422 VIRTIO_PCI_VRING_ALIGN, size);
423 vring_desc_init_packed(vq, size);
424 } else {
425 struct vring *vr = &vq->vq_split.ring;
426
427 vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
428 vring_desc_init_split(vr->desc, size);
429 }
430 /*
431 * Disable device(host) interrupting guest
432 */
433 virtqueue_disable_intr(vq);
434 }
435
436 static int
virtio_init_queue(struct rte_eth_dev * dev,uint16_t vtpci_queue_idx)437 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
438 {
439 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
440 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
441 const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
442 unsigned int vq_size, size;
443 struct virtio_hw *hw = dev->data->dev_private;
444 struct virtnet_rx *rxvq = NULL;
445 struct virtnet_tx *txvq = NULL;
446 struct virtnet_ctl *cvq = NULL;
447 struct virtqueue *vq;
448 size_t sz_hdr_mz = 0;
449 void *sw_ring = NULL;
450 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
451 int ret;
452 int numa_node = dev->device->numa_node;
453
454 PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
455 vtpci_queue_idx, numa_node);
456
457 /*
458 * Read the virtqueue size from the Queue Size field
459 * Always power of 2 and if 0 virtqueue does not exist
460 */
461 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
462 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
463 if (vq_size == 0) {
464 PMD_INIT_LOG(ERR, "virtqueue does not exist");
465 return -EINVAL;
466 }
467
468 if (!vtpci_packed_queue(hw) && !rte_is_power_of_2(vq_size)) {
469 PMD_INIT_LOG(ERR, "split virtqueue size is not power of 2");
470 return -EINVAL;
471 }
472
473 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
474 dev->data->port_id, vtpci_queue_idx);
475
476 size = RTE_ALIGN_CEIL(sizeof(*vq) +
477 vq_size * sizeof(struct vq_desc_extra),
478 RTE_CACHE_LINE_SIZE);
479 if (queue_type == VTNET_TQ) {
480 /*
481 * For each xmit packet, allocate a virtio_net_hdr
482 * and indirect ring elements
483 */
484 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
485 } else if (queue_type == VTNET_CQ) {
486 /* Allocate a page for control vq command, data and status */
487 sz_hdr_mz = PAGE_SIZE;
488 }
489
490 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
491 numa_node);
492 if (vq == NULL) {
493 PMD_INIT_LOG(ERR, "can not allocate vq");
494 return -ENOMEM;
495 }
496 hw->vqs[vtpci_queue_idx] = vq;
497
498 vq->hw = hw;
499 vq->vq_queue_index = vtpci_queue_idx;
500 vq->vq_nentries = vq_size;
501 if (vtpci_packed_queue(hw)) {
502 vq->vq_packed.used_wrap_counter = 1;
503 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
504 vq->vq_packed.event_flags_shadow = 0;
505 if (queue_type == VTNET_RQ)
506 vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
507 }
508
509 /*
510 * Reserve a memzone for vring elements
511 */
512 size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
513 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
514 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
515 size, vq->vq_ring_size);
516
517 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
518 numa_node, RTE_MEMZONE_IOVA_CONTIG,
519 VIRTIO_PCI_VRING_ALIGN);
520 if (mz == NULL) {
521 if (rte_errno == EEXIST)
522 mz = rte_memzone_lookup(vq_name);
523 if (mz == NULL) {
524 ret = -ENOMEM;
525 goto fail_q_alloc;
526 }
527 }
528
529 memset(mz->addr, 0, mz->len);
530
531 vq->vq_ring_mem = mz->iova;
532 vq->vq_ring_virt_mem = mz->addr;
533 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64,
534 (uint64_t)mz->iova);
535 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
536 (uint64_t)(uintptr_t)mz->addr);
537
538 virtio_init_vring(vq);
539
540 if (sz_hdr_mz) {
541 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
542 dev->data->port_id, vtpci_queue_idx);
543 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
544 numa_node, RTE_MEMZONE_IOVA_CONTIG,
545 RTE_CACHE_LINE_SIZE);
546 if (hdr_mz == NULL) {
547 if (rte_errno == EEXIST)
548 hdr_mz = rte_memzone_lookup(vq_hdr_name);
549 if (hdr_mz == NULL) {
550 ret = -ENOMEM;
551 goto fail_q_alloc;
552 }
553 }
554 }
555
556 if (queue_type == VTNET_RQ) {
557 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
558 sizeof(vq->sw_ring[0]);
559
560 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
561 RTE_CACHE_LINE_SIZE, numa_node);
562 if (!sw_ring) {
563 PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
564 ret = -ENOMEM;
565 goto fail_q_alloc;
566 }
567
568 vq->sw_ring = sw_ring;
569 rxvq = &vq->rxq;
570 rxvq->vq = vq;
571 rxvq->port_id = dev->data->port_id;
572 rxvq->mz = mz;
573 } else if (queue_type == VTNET_TQ) {
574 txvq = &vq->txq;
575 txvq->vq = vq;
576 txvq->port_id = dev->data->port_id;
577 txvq->mz = mz;
578 txvq->virtio_net_hdr_mz = hdr_mz;
579 txvq->virtio_net_hdr_mem = hdr_mz->iova;
580 } else if (queue_type == VTNET_CQ) {
581 cvq = &vq->cq;
582 cvq->vq = vq;
583 cvq->mz = mz;
584 cvq->virtio_net_hdr_mz = hdr_mz;
585 cvq->virtio_net_hdr_mem = hdr_mz->iova;
586 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
587
588 hw->cvq = cvq;
589 }
590
591 /* For virtio_user case (that is when hw->virtio_user_dev is not NULL),
592 * we use virtual address. And we need properly set _offset_, please see
593 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
594 */
595 if (!hw->virtio_user_dev)
596 vq->offset = offsetof(struct rte_mbuf, buf_iova);
597 else {
598 vq->vq_ring_mem = (uintptr_t)mz->addr;
599 vq->offset = offsetof(struct rte_mbuf, buf_addr);
600 if (queue_type == VTNET_TQ)
601 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
602 else if (queue_type == VTNET_CQ)
603 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
604 }
605
606 if (queue_type == VTNET_TQ) {
607 struct virtio_tx_region *txr;
608 unsigned int i;
609
610 txr = hdr_mz->addr;
611 memset(txr, 0, vq_size * sizeof(*txr));
612 for (i = 0; i < vq_size; i++) {
613 /* first indirect descriptor is always the tx header */
614 if (!vtpci_packed_queue(hw)) {
615 struct vring_desc *start_dp = txr[i].tx_indir;
616 vring_desc_init_split(start_dp,
617 RTE_DIM(txr[i].tx_indir));
618 start_dp->addr = txvq->virtio_net_hdr_mem
619 + i * sizeof(*txr)
620 + offsetof(struct virtio_tx_region,
621 tx_hdr);
622 start_dp->len = hw->vtnet_hdr_size;
623 start_dp->flags = VRING_DESC_F_NEXT;
624 } else {
625 struct vring_packed_desc *start_dp =
626 txr[i].tx_packed_indir;
627 vring_desc_init_indirect_packed(start_dp,
628 RTE_DIM(txr[i].tx_packed_indir));
629 start_dp->addr = txvq->virtio_net_hdr_mem
630 + i * sizeof(*txr)
631 + offsetof(struct virtio_tx_region,
632 tx_hdr);
633 start_dp->len = hw->vtnet_hdr_size;
634 }
635 }
636 }
637
638 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
639 PMD_INIT_LOG(ERR, "setup_queue failed");
640 return -EINVAL;
641 }
642
643 return 0;
644
645 fail_q_alloc:
646 rte_free(sw_ring);
647 rte_memzone_free(hdr_mz);
648 rte_memzone_free(mz);
649 rte_free(vq);
650
651 return ret;
652 }
653
654 static void
virtio_free_queues(struct virtio_hw * hw)655 virtio_free_queues(struct virtio_hw *hw)
656 {
657 uint16_t nr_vq = virtio_get_nr_vq(hw);
658 struct virtqueue *vq;
659 int queue_type;
660 uint16_t i;
661
662 if (hw->vqs == NULL)
663 return;
664
665 for (i = 0; i < nr_vq; i++) {
666 vq = hw->vqs[i];
667 if (!vq)
668 continue;
669
670 queue_type = virtio_get_queue_type(hw, i);
671 if (queue_type == VTNET_RQ) {
672 rte_free(vq->sw_ring);
673 rte_memzone_free(vq->rxq.mz);
674 } else if (queue_type == VTNET_TQ) {
675 rte_memzone_free(vq->txq.mz);
676 rte_memzone_free(vq->txq.virtio_net_hdr_mz);
677 } else {
678 rte_memzone_free(vq->cq.mz);
679 rte_memzone_free(vq->cq.virtio_net_hdr_mz);
680 }
681
682 rte_free(vq);
683 hw->vqs[i] = NULL;
684 }
685
686 rte_free(hw->vqs);
687 hw->vqs = NULL;
688 }
689
690 static int
virtio_alloc_queues(struct rte_eth_dev * dev)691 virtio_alloc_queues(struct rte_eth_dev *dev)
692 {
693 struct virtio_hw *hw = dev->data->dev_private;
694 uint16_t nr_vq = virtio_get_nr_vq(hw);
695 uint16_t i;
696 int ret;
697
698 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
699 if (!hw->vqs) {
700 PMD_INIT_LOG(ERR, "failed to allocate vqs");
701 return -ENOMEM;
702 }
703
704 for (i = 0; i < nr_vq; i++) {
705 ret = virtio_init_queue(dev, i);
706 if (ret < 0) {
707 virtio_free_queues(hw);
708 return ret;
709 }
710 }
711
712 return 0;
713 }
714
715 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
716
717 static int
virtio_dev_close(struct rte_eth_dev * dev)718 virtio_dev_close(struct rte_eth_dev *dev)
719 {
720 struct virtio_hw *hw = dev->data->dev_private;
721 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
722
723 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
724 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
725 return 0;
726
727 if (!hw->opened)
728 return 0;
729 hw->opened = false;
730
731 /* reset the NIC */
732 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
733 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
734 if (intr_conf->rxq)
735 virtio_queues_unbind_intr(dev);
736
737 if (intr_conf->lsc || intr_conf->rxq) {
738 virtio_intr_disable(dev);
739 rte_intr_efd_disable(dev->intr_handle);
740 rte_free(dev->intr_handle->intr_vec);
741 dev->intr_handle->intr_vec = NULL;
742 }
743
744 vtpci_reset(hw);
745 virtio_dev_free_mbufs(dev);
746 virtio_free_queues(hw);
747
748 #ifdef RTE_VIRTIO_USER
749 if (hw->virtio_user_dev)
750 virtio_user_dev_uninit(hw->virtio_user_dev);
751 else
752 #endif
753 if (dev->device) {
754 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
755 if (!hw->modern)
756 rte_pci_ioport_unmap(VTPCI_IO(hw));
757 }
758
759 return 0;
760 }
761
762 static int
virtio_dev_promiscuous_enable(struct rte_eth_dev * dev)763 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
764 {
765 struct virtio_hw *hw = dev->data->dev_private;
766 struct virtio_pmd_ctrl ctrl;
767 int dlen[1];
768 int ret;
769
770 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
771 PMD_INIT_LOG(INFO, "host does not support rx control");
772 return -ENOTSUP;
773 }
774
775 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
776 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
777 ctrl.data[0] = 1;
778 dlen[0] = 1;
779
780 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
781 if (ret) {
782 PMD_INIT_LOG(ERR, "Failed to enable promisc");
783 return -EAGAIN;
784 }
785
786 return 0;
787 }
788
789 static int
virtio_dev_promiscuous_disable(struct rte_eth_dev * dev)790 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
791 {
792 struct virtio_hw *hw = dev->data->dev_private;
793 struct virtio_pmd_ctrl ctrl;
794 int dlen[1];
795 int ret;
796
797 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
798 PMD_INIT_LOG(INFO, "host does not support rx control");
799 return -ENOTSUP;
800 }
801
802 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
803 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
804 ctrl.data[0] = 0;
805 dlen[0] = 1;
806
807 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
808 if (ret) {
809 PMD_INIT_LOG(ERR, "Failed to disable promisc");
810 return -EAGAIN;
811 }
812
813 return 0;
814 }
815
816 static int
virtio_dev_allmulticast_enable(struct rte_eth_dev * dev)817 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
818 {
819 struct virtio_hw *hw = dev->data->dev_private;
820 struct virtio_pmd_ctrl ctrl;
821 int dlen[1];
822 int ret;
823
824 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
825 PMD_INIT_LOG(INFO, "host does not support rx control");
826 return -ENOTSUP;
827 }
828
829 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
830 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
831 ctrl.data[0] = 1;
832 dlen[0] = 1;
833
834 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
835 if (ret) {
836 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
837 return -EAGAIN;
838 }
839
840 return 0;
841 }
842
843 static int
virtio_dev_allmulticast_disable(struct rte_eth_dev * dev)844 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
845 {
846 struct virtio_hw *hw = dev->data->dev_private;
847 struct virtio_pmd_ctrl ctrl;
848 int dlen[1];
849 int ret;
850
851 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
852 PMD_INIT_LOG(INFO, "host does not support rx control");
853 return -ENOTSUP;
854 }
855
856 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
857 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
858 ctrl.data[0] = 0;
859 dlen[0] = 1;
860
861 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
862 if (ret) {
863 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
864 return -EAGAIN;
865 }
866
867 return 0;
868 }
869
870 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */
871 static int
virtio_mtu_set(struct rte_eth_dev * dev,uint16_t mtu)872 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
873 {
874 struct virtio_hw *hw = dev->data->dev_private;
875 uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
876 hw->vtnet_hdr_size;
877 uint32_t frame_size = mtu + ether_hdr_len;
878 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
879
880 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
881
882 if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
883 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
884 RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
885 return -EINVAL;
886 }
887 return 0;
888 }
889
890 static int
virtio_dev_rx_queue_intr_enable(struct rte_eth_dev * dev,uint16_t queue_id)891 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
892 {
893 struct virtio_hw *hw = dev->data->dev_private;
894 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
895 struct virtqueue *vq = rxvq->vq;
896
897 virtqueue_enable_intr(vq);
898 virtio_mb(hw->weak_barriers);
899 return 0;
900 }
901
902 static int
virtio_dev_rx_queue_intr_disable(struct rte_eth_dev * dev,uint16_t queue_id)903 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
904 {
905 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
906 struct virtqueue *vq = rxvq->vq;
907
908 virtqueue_disable_intr(vq);
909 return 0;
910 }
911
912 /*
913 * dev_ops for virtio, bare necessities for basic operation
914 */
915 static const struct eth_dev_ops virtio_eth_dev_ops = {
916 .dev_configure = virtio_dev_configure,
917 .dev_start = virtio_dev_start,
918 .dev_stop = virtio_dev_stop,
919 .dev_close = virtio_dev_close,
920 .promiscuous_enable = virtio_dev_promiscuous_enable,
921 .promiscuous_disable = virtio_dev_promiscuous_disable,
922 .allmulticast_enable = virtio_dev_allmulticast_enable,
923 .allmulticast_disable = virtio_dev_allmulticast_disable,
924 .mtu_set = virtio_mtu_set,
925 .dev_infos_get = virtio_dev_info_get,
926 .stats_get = virtio_dev_stats_get,
927 .xstats_get = virtio_dev_xstats_get,
928 .xstats_get_names = virtio_dev_xstats_get_names,
929 .stats_reset = virtio_dev_stats_reset,
930 .xstats_reset = virtio_dev_stats_reset,
931 .link_update = virtio_dev_link_update,
932 .vlan_offload_set = virtio_dev_vlan_offload_set,
933 .rx_queue_setup = virtio_dev_rx_queue_setup,
934 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable,
935 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable,
936 .rx_queue_release = virtio_dev_queue_release,
937 .tx_queue_setup = virtio_dev_tx_queue_setup,
938 .tx_queue_release = virtio_dev_queue_release,
939 /* collect stats per queue */
940 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
941 .vlan_filter_set = virtio_vlan_filter_set,
942 .mac_addr_add = virtio_mac_addr_add,
943 .mac_addr_remove = virtio_mac_addr_remove,
944 .mac_addr_set = virtio_mac_addr_set,
945 };
946
947 /*
948 * dev_ops for virtio-user in secondary processes, as we just have
949 * some limited supports currently.
950 */
951 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
952 .dev_infos_get = virtio_dev_info_get,
953 .stats_get = virtio_dev_stats_get,
954 .xstats_get = virtio_dev_xstats_get,
955 .xstats_get_names = virtio_dev_xstats_get_names,
956 .stats_reset = virtio_dev_stats_reset,
957 .xstats_reset = virtio_dev_stats_reset,
958 /* collect stats per queue */
959 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
960 };
961
962 static void
virtio_update_stats(struct rte_eth_dev * dev,struct rte_eth_stats * stats)963 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
964 {
965 unsigned i;
966
967 for (i = 0; i < dev->data->nb_tx_queues; i++) {
968 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
969 if (txvq == NULL)
970 continue;
971
972 stats->opackets += txvq->stats.packets;
973 stats->obytes += txvq->stats.bytes;
974
975 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
976 stats->q_opackets[i] = txvq->stats.packets;
977 stats->q_obytes[i] = txvq->stats.bytes;
978 }
979 }
980
981 for (i = 0; i < dev->data->nb_rx_queues; i++) {
982 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
983 if (rxvq == NULL)
984 continue;
985
986 stats->ipackets += rxvq->stats.packets;
987 stats->ibytes += rxvq->stats.bytes;
988 stats->ierrors += rxvq->stats.errors;
989
990 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
991 stats->q_ipackets[i] = rxvq->stats.packets;
992 stats->q_ibytes[i] = rxvq->stats.bytes;
993 }
994 }
995
996 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
997 }
998
virtio_dev_xstats_get_names(struct rte_eth_dev * dev,struct rte_eth_xstat_name * xstats_names,__rte_unused unsigned limit)999 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
1000 struct rte_eth_xstat_name *xstats_names,
1001 __rte_unused unsigned limit)
1002 {
1003 unsigned i;
1004 unsigned count = 0;
1005 unsigned t;
1006
1007 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1008 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1009
1010 if (xstats_names != NULL) {
1011 /* Note: limit checked in rte_eth_xstats_names() */
1012
1013 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1014 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1015 if (rxvq == NULL)
1016 continue;
1017 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1018 snprintf(xstats_names[count].name,
1019 sizeof(xstats_names[count].name),
1020 "rx_q%u_%s", i,
1021 rte_virtio_rxq_stat_strings[t].name);
1022 count++;
1023 }
1024 }
1025
1026 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1027 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1028 if (txvq == NULL)
1029 continue;
1030 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1031 snprintf(xstats_names[count].name,
1032 sizeof(xstats_names[count].name),
1033 "tx_q%u_%s", i,
1034 rte_virtio_txq_stat_strings[t].name);
1035 count++;
1036 }
1037 }
1038 return count;
1039 }
1040 return nstats;
1041 }
1042
1043 static int
virtio_dev_xstats_get(struct rte_eth_dev * dev,struct rte_eth_xstat * xstats,unsigned n)1044 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1045 unsigned n)
1046 {
1047 unsigned i;
1048 unsigned count = 0;
1049
1050 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1051 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1052
1053 if (n < nstats)
1054 return nstats;
1055
1056 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1057 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1058
1059 if (rxvq == NULL)
1060 continue;
1061
1062 unsigned t;
1063
1064 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1065 xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1066 rte_virtio_rxq_stat_strings[t].offset);
1067 xstats[count].id = count;
1068 count++;
1069 }
1070 }
1071
1072 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1073 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1074
1075 if (txvq == NULL)
1076 continue;
1077
1078 unsigned t;
1079
1080 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1081 xstats[count].value = *(uint64_t *)(((char *)txvq) +
1082 rte_virtio_txq_stat_strings[t].offset);
1083 xstats[count].id = count;
1084 count++;
1085 }
1086 }
1087
1088 return count;
1089 }
1090
1091 static int
virtio_dev_stats_get(struct rte_eth_dev * dev,struct rte_eth_stats * stats)1092 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1093 {
1094 virtio_update_stats(dev, stats);
1095
1096 return 0;
1097 }
1098
1099 static int
virtio_dev_stats_reset(struct rte_eth_dev * dev)1100 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1101 {
1102 unsigned int i;
1103
1104 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1105 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1106 if (txvq == NULL)
1107 continue;
1108
1109 txvq->stats.packets = 0;
1110 txvq->stats.bytes = 0;
1111 txvq->stats.multicast = 0;
1112 txvq->stats.broadcast = 0;
1113 memset(txvq->stats.size_bins, 0,
1114 sizeof(txvq->stats.size_bins[0]) * 8);
1115 }
1116
1117 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1118 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1119 if (rxvq == NULL)
1120 continue;
1121
1122 rxvq->stats.packets = 0;
1123 rxvq->stats.bytes = 0;
1124 rxvq->stats.errors = 0;
1125 rxvq->stats.multicast = 0;
1126 rxvq->stats.broadcast = 0;
1127 memset(rxvq->stats.size_bins, 0,
1128 sizeof(rxvq->stats.size_bins[0]) * 8);
1129 }
1130
1131 return 0;
1132 }
1133
1134 static void
virtio_set_hwaddr(struct virtio_hw * hw)1135 virtio_set_hwaddr(struct virtio_hw *hw)
1136 {
1137 vtpci_write_dev_config(hw,
1138 offsetof(struct virtio_net_config, mac),
1139 &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1140 }
1141
1142 static void
virtio_get_hwaddr(struct virtio_hw * hw)1143 virtio_get_hwaddr(struct virtio_hw *hw)
1144 {
1145 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1146 vtpci_read_dev_config(hw,
1147 offsetof(struct virtio_net_config, mac),
1148 &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1149 } else {
1150 rte_eth_random_addr(&hw->mac_addr[0]);
1151 virtio_set_hwaddr(hw);
1152 }
1153 }
1154
1155 static int
virtio_mac_table_set(struct virtio_hw * hw,const struct virtio_net_ctrl_mac * uc,const struct virtio_net_ctrl_mac * mc)1156 virtio_mac_table_set(struct virtio_hw *hw,
1157 const struct virtio_net_ctrl_mac *uc,
1158 const struct virtio_net_ctrl_mac *mc)
1159 {
1160 struct virtio_pmd_ctrl ctrl;
1161 int err, len[2];
1162
1163 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1164 PMD_DRV_LOG(INFO, "host does not support mac table");
1165 return -1;
1166 }
1167
1168 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1169 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1170
1171 len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1172 memcpy(ctrl.data, uc, len[0]);
1173
1174 len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1175 memcpy(ctrl.data + len[0], mc, len[1]);
1176
1177 err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1178 if (err != 0)
1179 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1180 return err;
1181 }
1182
1183 static int
virtio_mac_addr_add(struct rte_eth_dev * dev,struct rte_ether_addr * mac_addr,uint32_t index,uint32_t vmdq __rte_unused)1184 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1185 uint32_t index, uint32_t vmdq __rte_unused)
1186 {
1187 struct virtio_hw *hw = dev->data->dev_private;
1188 const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1189 unsigned int i;
1190 struct virtio_net_ctrl_mac *uc, *mc;
1191
1192 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1193 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1194 return -EINVAL;
1195 }
1196
1197 uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1198 sizeof(uc->entries));
1199 uc->entries = 0;
1200 mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1201 sizeof(mc->entries));
1202 mc->entries = 0;
1203
1204 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1205 const struct rte_ether_addr *addr
1206 = (i == index) ? mac_addr : addrs + i;
1207 struct virtio_net_ctrl_mac *tbl
1208 = rte_is_multicast_ether_addr(addr) ? mc : uc;
1209
1210 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1211 }
1212
1213 return virtio_mac_table_set(hw, uc, mc);
1214 }
1215
1216 static void
virtio_mac_addr_remove(struct rte_eth_dev * dev,uint32_t index)1217 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1218 {
1219 struct virtio_hw *hw = dev->data->dev_private;
1220 struct rte_ether_addr *addrs = dev->data->mac_addrs;
1221 struct virtio_net_ctrl_mac *uc, *mc;
1222 unsigned int i;
1223
1224 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1225 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1226 return;
1227 }
1228
1229 uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1230 sizeof(uc->entries));
1231 uc->entries = 0;
1232 mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1233 sizeof(mc->entries));
1234 mc->entries = 0;
1235
1236 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1237 struct virtio_net_ctrl_mac *tbl;
1238
1239 if (i == index || rte_is_zero_ether_addr(addrs + i))
1240 continue;
1241
1242 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1243 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1244 RTE_ETHER_ADDR_LEN);
1245 }
1246
1247 virtio_mac_table_set(hw, uc, mc);
1248 }
1249
1250 static int
virtio_mac_addr_set(struct rte_eth_dev * dev,struct rte_ether_addr * mac_addr)1251 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1252 {
1253 struct virtio_hw *hw = dev->data->dev_private;
1254
1255 memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1256
1257 /* Use atomic update if available */
1258 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1259 struct virtio_pmd_ctrl ctrl;
1260 int len = RTE_ETHER_ADDR_LEN;
1261
1262 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1263 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1264
1265 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1266 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1267 }
1268
1269 if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1270 return -ENOTSUP;
1271
1272 virtio_set_hwaddr(hw);
1273 return 0;
1274 }
1275
1276 static int
virtio_vlan_filter_set(struct rte_eth_dev * dev,uint16_t vlan_id,int on)1277 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1278 {
1279 struct virtio_hw *hw = dev->data->dev_private;
1280 struct virtio_pmd_ctrl ctrl;
1281 int len;
1282
1283 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1284 return -ENOTSUP;
1285
1286 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1287 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1288 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1289 len = sizeof(vlan_id);
1290
1291 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1292 }
1293
1294 static int
virtio_intr_unmask(struct rte_eth_dev * dev)1295 virtio_intr_unmask(struct rte_eth_dev *dev)
1296 {
1297 struct virtio_hw *hw = dev->data->dev_private;
1298
1299 if (rte_intr_ack(dev->intr_handle) < 0)
1300 return -1;
1301
1302 if (!hw->virtio_user_dev)
1303 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1304
1305 return 0;
1306 }
1307
1308 static int
virtio_intr_enable(struct rte_eth_dev * dev)1309 virtio_intr_enable(struct rte_eth_dev *dev)
1310 {
1311 struct virtio_hw *hw = dev->data->dev_private;
1312
1313 if (rte_intr_enable(dev->intr_handle) < 0)
1314 return -1;
1315
1316 if (!hw->virtio_user_dev)
1317 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1318
1319 return 0;
1320 }
1321
1322 static int
virtio_intr_disable(struct rte_eth_dev * dev)1323 virtio_intr_disable(struct rte_eth_dev *dev)
1324 {
1325 struct virtio_hw *hw = dev->data->dev_private;
1326
1327 if (rte_intr_disable(dev->intr_handle) < 0)
1328 return -1;
1329
1330 if (!hw->virtio_user_dev)
1331 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1332
1333 return 0;
1334 }
1335
1336 static int
virtio_negotiate_features(struct virtio_hw * hw,uint64_t req_features)1337 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1338 {
1339 uint64_t host_features;
1340
1341 /* Prepare guest_features: feature that driver wants to support */
1342 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1343 req_features);
1344
1345 /* Read device(host) feature bits */
1346 host_features = VTPCI_OPS(hw)->get_features(hw);
1347 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1348 host_features);
1349
1350 /* If supported, ensure MTU value is valid before acknowledging it. */
1351 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1352 struct virtio_net_config config;
1353
1354 vtpci_read_dev_config(hw,
1355 offsetof(struct virtio_net_config, mtu),
1356 &config.mtu, sizeof(config.mtu));
1357
1358 if (config.mtu < RTE_ETHER_MIN_MTU)
1359 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1360 }
1361
1362 /*
1363 * Negotiate features: Subset of device feature bits are written back
1364 * guest feature bits.
1365 */
1366 hw->guest_features = req_features;
1367 hw->guest_features = vtpci_negotiate_features(hw, host_features);
1368 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1369 hw->guest_features);
1370
1371 if (hw->modern && !vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1372 PMD_INIT_LOG(ERR,
1373 "VIRTIO_F_VERSION_1 features is not enabled.");
1374 return -1;
1375 }
1376
1377 if (hw->modern || hw->virtio_user_dev) {
1378 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1379 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1380 PMD_INIT_LOG(ERR,
1381 "failed to set FEATURES_OK status!");
1382 return -1;
1383 }
1384 }
1385
1386 hw->req_guest_features = req_features;
1387
1388 return 0;
1389 }
1390
1391 int
virtio_dev_pause(struct rte_eth_dev * dev)1392 virtio_dev_pause(struct rte_eth_dev *dev)
1393 {
1394 struct virtio_hw *hw = dev->data->dev_private;
1395
1396 rte_spinlock_lock(&hw->state_lock);
1397
1398 if (hw->started == 0) {
1399 /* Device is just stopped. */
1400 rte_spinlock_unlock(&hw->state_lock);
1401 return -1;
1402 }
1403 hw->started = 0;
1404 /*
1405 * Prevent the worker threads from touching queues to avoid contention,
1406 * 1 ms should be enough for the ongoing Tx function to finish.
1407 */
1408 rte_delay_ms(1);
1409 return 0;
1410 }
1411
1412 /*
1413 * Recover hw state to let the worker threads continue.
1414 */
1415 void
virtio_dev_resume(struct rte_eth_dev * dev)1416 virtio_dev_resume(struct rte_eth_dev *dev)
1417 {
1418 struct virtio_hw *hw = dev->data->dev_private;
1419
1420 hw->started = 1;
1421 rte_spinlock_unlock(&hw->state_lock);
1422 }
1423
1424 /*
1425 * Should be called only after device is paused.
1426 */
1427 int
virtio_inject_pkts(struct rte_eth_dev * dev,struct rte_mbuf ** tx_pkts,int nb_pkts)1428 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1429 int nb_pkts)
1430 {
1431 struct virtio_hw *hw = dev->data->dev_private;
1432 struct virtnet_tx *txvq = dev->data->tx_queues[0];
1433 int ret;
1434
1435 hw->inject_pkts = tx_pkts;
1436 ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1437 hw->inject_pkts = NULL;
1438
1439 return ret;
1440 }
1441
1442 static void
virtio_notify_peers(struct rte_eth_dev * dev)1443 virtio_notify_peers(struct rte_eth_dev *dev)
1444 {
1445 struct virtio_hw *hw = dev->data->dev_private;
1446 struct virtnet_rx *rxvq;
1447 struct rte_mbuf *rarp_mbuf;
1448
1449 if (!dev->data->rx_queues)
1450 return;
1451
1452 rxvq = dev->data->rx_queues[0];
1453 if (!rxvq)
1454 return;
1455
1456 rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1457 (struct rte_ether_addr *)hw->mac_addr);
1458 if (rarp_mbuf == NULL) {
1459 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1460 return;
1461 }
1462
1463 /* If virtio port just stopped, no need to send RARP */
1464 if (virtio_dev_pause(dev) < 0) {
1465 rte_pktmbuf_free(rarp_mbuf);
1466 return;
1467 }
1468
1469 virtio_inject_pkts(dev, &rarp_mbuf, 1);
1470 virtio_dev_resume(dev);
1471 }
1472
1473 static void
virtio_ack_link_announce(struct rte_eth_dev * dev)1474 virtio_ack_link_announce(struct rte_eth_dev *dev)
1475 {
1476 struct virtio_hw *hw = dev->data->dev_private;
1477 struct virtio_pmd_ctrl ctrl;
1478
1479 ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1480 ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1481
1482 virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1483 }
1484
1485 /*
1486 * Process virtio config changed interrupt. Call the callback
1487 * if link state changed, generate gratuitous RARP packet if
1488 * the status indicates an ANNOUNCE.
1489 */
1490 void
virtio_interrupt_handler(void * param)1491 virtio_interrupt_handler(void *param)
1492 {
1493 struct rte_eth_dev *dev = param;
1494 struct virtio_hw *hw = dev->data->dev_private;
1495 uint8_t isr;
1496 uint16_t status;
1497
1498 /* Read interrupt status which clears interrupt */
1499 isr = vtpci_isr(hw);
1500 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1501
1502 if (virtio_intr_unmask(dev) < 0)
1503 PMD_DRV_LOG(ERR, "interrupt enable failed");
1504
1505 if (isr & VIRTIO_PCI_ISR_CONFIG) {
1506 if (virtio_dev_link_update(dev, 0) == 0)
1507 rte_eth_dev_callback_process(dev,
1508 RTE_ETH_EVENT_INTR_LSC,
1509 NULL);
1510
1511 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1512 vtpci_read_dev_config(hw,
1513 offsetof(struct virtio_net_config, status),
1514 &status, sizeof(status));
1515 if (status & VIRTIO_NET_S_ANNOUNCE) {
1516 virtio_notify_peers(dev);
1517 if (hw->cvq)
1518 virtio_ack_link_announce(dev);
1519 }
1520 }
1521 }
1522 }
1523
1524 /* set rx and tx handlers according to what is supported */
1525 static void
set_rxtx_funcs(struct rte_eth_dev * eth_dev)1526 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1527 {
1528 struct virtio_hw *hw = eth_dev->data->dev_private;
1529
1530 eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1531 if (vtpci_packed_queue(hw)) {
1532 PMD_INIT_LOG(INFO,
1533 "virtio: using packed ring %s Tx path on port %u",
1534 hw->use_vec_tx ? "vectorized" : "standard",
1535 eth_dev->data->port_id);
1536 if (hw->use_vec_tx)
1537 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1538 else
1539 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1540 } else {
1541 if (hw->use_inorder_tx) {
1542 PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1543 eth_dev->data->port_id);
1544 eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1545 } else {
1546 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1547 eth_dev->data->port_id);
1548 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1549 }
1550 }
1551
1552 if (vtpci_packed_queue(hw)) {
1553 if (hw->use_vec_rx) {
1554 PMD_INIT_LOG(INFO,
1555 "virtio: using packed ring vectorized Rx path on port %u",
1556 eth_dev->data->port_id);
1557 eth_dev->rx_pkt_burst =
1558 &virtio_recv_pkts_packed_vec;
1559 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1560 PMD_INIT_LOG(INFO,
1561 "virtio: using packed ring mergeable buffer Rx path on port %u",
1562 eth_dev->data->port_id);
1563 eth_dev->rx_pkt_burst =
1564 &virtio_recv_mergeable_pkts_packed;
1565 } else {
1566 PMD_INIT_LOG(INFO,
1567 "virtio: using packed ring standard Rx path on port %u",
1568 eth_dev->data->port_id);
1569 eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1570 }
1571 } else {
1572 if (hw->use_vec_rx) {
1573 PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1574 eth_dev->data->port_id);
1575 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1576 } else if (hw->use_inorder_rx) {
1577 PMD_INIT_LOG(INFO,
1578 "virtio: using inorder Rx path on port %u",
1579 eth_dev->data->port_id);
1580 eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1581 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1582 PMD_INIT_LOG(INFO,
1583 "virtio: using mergeable buffer Rx path on port %u",
1584 eth_dev->data->port_id);
1585 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1586 } else {
1587 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1588 eth_dev->data->port_id);
1589 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1590 }
1591 }
1592
1593 }
1594
1595 /* Only support 1:1 queue/interrupt mapping so far.
1596 * TODO: support n:1 queue/interrupt mapping when there are limited number of
1597 * interrupt vectors (<N+1).
1598 */
1599 static int
virtio_queues_bind_intr(struct rte_eth_dev * dev)1600 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1601 {
1602 uint32_t i;
1603 struct virtio_hw *hw = dev->data->dev_private;
1604
1605 PMD_INIT_LOG(INFO, "queue/interrupt binding");
1606 for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1607 dev->intr_handle->intr_vec[i] = i + 1;
1608 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1609 VIRTIO_MSI_NO_VECTOR) {
1610 PMD_DRV_LOG(ERR, "failed to set queue vector");
1611 return -EBUSY;
1612 }
1613 }
1614
1615 return 0;
1616 }
1617
1618 static void
virtio_queues_unbind_intr(struct rte_eth_dev * dev)1619 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1620 {
1621 uint32_t i;
1622 struct virtio_hw *hw = dev->data->dev_private;
1623
1624 PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1625 for (i = 0; i < dev->data->nb_rx_queues; ++i)
1626 VTPCI_OPS(hw)->set_queue_irq(hw,
1627 hw->vqs[i * VTNET_CQ],
1628 VIRTIO_MSI_NO_VECTOR);
1629 }
1630
1631 static int
virtio_configure_intr(struct rte_eth_dev * dev)1632 virtio_configure_intr(struct rte_eth_dev *dev)
1633 {
1634 struct virtio_hw *hw = dev->data->dev_private;
1635
1636 if (!rte_intr_cap_multiple(dev->intr_handle)) {
1637 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1638 return -ENOTSUP;
1639 }
1640
1641 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1642 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1643 return -1;
1644 }
1645
1646 if (!dev->intr_handle->intr_vec) {
1647 dev->intr_handle->intr_vec =
1648 rte_zmalloc("intr_vec",
1649 hw->max_queue_pairs * sizeof(int), 0);
1650 if (!dev->intr_handle->intr_vec) {
1651 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1652 hw->max_queue_pairs);
1653 return -ENOMEM;
1654 }
1655 }
1656
1657 /* Re-register callback to update max_intr */
1658 rte_intr_callback_unregister(dev->intr_handle,
1659 virtio_interrupt_handler,
1660 dev);
1661 rte_intr_callback_register(dev->intr_handle,
1662 virtio_interrupt_handler,
1663 dev);
1664
1665 /* DO NOT try to remove this! This function will enable msix, or QEMU
1666 * will encounter SIGSEGV when DRIVER_OK is sent.
1667 * And for legacy devices, this should be done before queue/vec binding
1668 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1669 * (22) will be ignored.
1670 */
1671 if (virtio_intr_enable(dev) < 0) {
1672 PMD_DRV_LOG(ERR, "interrupt enable failed");
1673 return -1;
1674 }
1675
1676 if (virtio_queues_bind_intr(dev) < 0) {
1677 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1678 return -1;
1679 }
1680
1681 return 0;
1682 }
1683 #define DUPLEX_UNKNOWN 0xff
1684 /* reset device and renegotiate features if needed */
1685 static int
virtio_init_device(struct rte_eth_dev * eth_dev,uint64_t req_features)1686 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1687 {
1688 struct virtio_hw *hw = eth_dev->data->dev_private;
1689 struct virtio_net_config *config;
1690 struct virtio_net_config local_config;
1691 struct rte_pci_device *pci_dev = NULL;
1692 int ret;
1693
1694 /* Reset the device although not necessary at startup */
1695 vtpci_reset(hw);
1696
1697 if (hw->vqs) {
1698 virtio_dev_free_mbufs(eth_dev);
1699 virtio_free_queues(hw);
1700 }
1701
1702 /* Tell the host we've noticed this device. */
1703 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1704
1705 /* Tell the host we've known how to drive the device. */
1706 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1707 if (virtio_negotiate_features(hw, req_features) < 0)
1708 return -1;
1709
1710 hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1711
1712 if (!hw->virtio_user_dev)
1713 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1714
1715 /* If host does not support both status and MSI-X then disable LSC */
1716 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1717 hw->use_msix != VIRTIO_MSIX_NONE)
1718 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1719 else
1720 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1721
1722 eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1723
1724 /* Setting up rx_header size for the device */
1725 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1726 vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1727 vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1728 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1729 else
1730 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1731
1732 /* Copy the permanent MAC address to: virtio_hw */
1733 virtio_get_hwaddr(hw);
1734 rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1735 ð_dev->data->mac_addrs[0]);
1736 PMD_INIT_LOG(DEBUG,
1737 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1738 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1739 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1740
1741 if (hw->speed == ETH_SPEED_NUM_UNKNOWN) {
1742 if (vtpci_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1743 config = &local_config;
1744 vtpci_read_dev_config(hw,
1745 offsetof(struct virtio_net_config, speed),
1746 &config->speed, sizeof(config->speed));
1747 vtpci_read_dev_config(hw,
1748 offsetof(struct virtio_net_config, duplex),
1749 &config->duplex, sizeof(config->duplex));
1750 hw->speed = config->speed;
1751 hw->duplex = config->duplex;
1752 }
1753 }
1754 if (hw->duplex == DUPLEX_UNKNOWN)
1755 hw->duplex = ETH_LINK_FULL_DUPLEX;
1756 PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1757 hw->speed, hw->duplex);
1758 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1759 config = &local_config;
1760
1761 vtpci_read_dev_config(hw,
1762 offsetof(struct virtio_net_config, mac),
1763 &config->mac, sizeof(config->mac));
1764
1765 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1766 vtpci_read_dev_config(hw,
1767 offsetof(struct virtio_net_config, status),
1768 &config->status, sizeof(config->status));
1769 } else {
1770 PMD_INIT_LOG(DEBUG,
1771 "VIRTIO_NET_F_STATUS is not supported");
1772 config->status = 0;
1773 }
1774
1775 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1776 vtpci_read_dev_config(hw,
1777 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1778 &config->max_virtqueue_pairs,
1779 sizeof(config->max_virtqueue_pairs));
1780 } else {
1781 PMD_INIT_LOG(DEBUG,
1782 "VIRTIO_NET_F_MQ is not supported");
1783 config->max_virtqueue_pairs = 1;
1784 }
1785
1786 hw->max_queue_pairs = config->max_virtqueue_pairs;
1787
1788 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1789 vtpci_read_dev_config(hw,
1790 offsetof(struct virtio_net_config, mtu),
1791 &config->mtu,
1792 sizeof(config->mtu));
1793
1794 /*
1795 * MTU value has already been checked at negotiation
1796 * time, but check again in case it has changed since
1797 * then, which should not happen.
1798 */
1799 if (config->mtu < RTE_ETHER_MIN_MTU) {
1800 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1801 config->mtu);
1802 return -1;
1803 }
1804
1805 hw->max_mtu = config->mtu;
1806 /* Set initial MTU to maximum one supported by vhost */
1807 eth_dev->data->mtu = config->mtu;
1808
1809 } else {
1810 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1811 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1812 }
1813
1814 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1815 config->max_virtqueue_pairs);
1816 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1817 PMD_INIT_LOG(DEBUG,
1818 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1819 config->mac[0], config->mac[1],
1820 config->mac[2], config->mac[3],
1821 config->mac[4], config->mac[5]);
1822 } else {
1823 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1824 hw->max_queue_pairs = 1;
1825 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1826 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1827 }
1828
1829 ret = virtio_alloc_queues(eth_dev);
1830 if (ret < 0)
1831 return ret;
1832
1833 if (eth_dev->data->dev_conf.intr_conf.rxq) {
1834 if (virtio_configure_intr(eth_dev) < 0) {
1835 PMD_INIT_LOG(ERR, "failed to configure interrupt");
1836 virtio_free_queues(hw);
1837 return -1;
1838 }
1839 }
1840
1841 vtpci_reinit_complete(hw);
1842
1843 if (pci_dev)
1844 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1845 eth_dev->data->port_id, pci_dev->id.vendor_id,
1846 pci_dev->id.device_id);
1847
1848 return 0;
1849 }
1850
1851 /*
1852 * Remap the PCI device again (IO port map for legacy device and
1853 * memory map for modern device), so that the secondary process
1854 * could have the PCI initiated correctly.
1855 */
1856 static int
virtio_remap_pci(struct rte_pci_device * pci_dev,struct virtio_hw * hw)1857 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1858 {
1859 if (hw->modern) {
1860 /*
1861 * We don't have to re-parse the PCI config space, since
1862 * rte_pci_map_device() makes sure the mapped address
1863 * in secondary process would equal to the one mapped in
1864 * the primary process: error will be returned if that
1865 * requirement is not met.
1866 *
1867 * That said, we could simply reuse all cap pointers
1868 * (such as dev_cfg, common_cfg, etc.) parsed from the
1869 * primary process, which is stored in shared memory.
1870 */
1871 if (rte_pci_map_device(pci_dev)) {
1872 PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1873 return -1;
1874 }
1875 } else {
1876 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1877 return -1;
1878 }
1879
1880 return 0;
1881 }
1882
1883 static void
virtio_set_vtpci_ops(struct virtio_hw * hw)1884 virtio_set_vtpci_ops(struct virtio_hw *hw)
1885 {
1886 #ifdef RTE_VIRTIO_USER
1887 if (hw->virtio_user_dev)
1888 VTPCI_OPS(hw) = &virtio_user_ops;
1889 else
1890 #endif
1891 if (hw->modern)
1892 VTPCI_OPS(hw) = &modern_ops;
1893 else
1894 VTPCI_OPS(hw) = &legacy_ops;
1895 }
1896
1897 /*
1898 * This function is based on probe() function in virtio_pci.c
1899 * It returns 0 on success.
1900 */
1901 int
eth_virtio_dev_init(struct rte_eth_dev * eth_dev)1902 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1903 {
1904 struct virtio_hw *hw = eth_dev->data->dev_private;
1905 uint32_t speed = ETH_SPEED_NUM_UNKNOWN;
1906 int vectorized = 0;
1907 int ret;
1908
1909 if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1910 PMD_INIT_LOG(ERR,
1911 "Not sufficient headroom required = %d, avail = %d",
1912 (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1913 RTE_PKTMBUF_HEADROOM);
1914
1915 return -1;
1916 }
1917
1918 eth_dev->dev_ops = &virtio_eth_dev_ops;
1919 eth_dev->rx_descriptor_done = virtio_dev_rx_queue_done;
1920
1921 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1922 if (!hw->virtio_user_dev) {
1923 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1924 if (ret)
1925 return ret;
1926 }
1927
1928 virtio_set_vtpci_ops(hw);
1929 set_rxtx_funcs(eth_dev);
1930
1931 return 0;
1932 }
1933 ret = virtio_dev_devargs_parse(eth_dev->device->devargs,
1934 NULL, &speed, &vectorized);
1935 if (ret < 0)
1936 return ret;
1937 hw->speed = speed;
1938
1939 /* Allocate memory for storing MAC addresses */
1940 eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1941 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1942 if (eth_dev->data->mac_addrs == NULL) {
1943 PMD_INIT_LOG(ERR,
1944 "Failed to allocate %d bytes needed to store MAC addresses",
1945 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1946 return -ENOMEM;
1947 }
1948
1949 hw->port_id = eth_dev->data->port_id;
1950 /* For virtio_user case the hw->virtio_user_dev is populated by
1951 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1952 */
1953 if (!hw->virtio_user_dev) {
1954 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1955 if (ret)
1956 goto err_vtpci_init;
1957 }
1958
1959 rte_spinlock_init(&hw->state_lock);
1960
1961 /* reset device and negotiate default features */
1962 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1963 if (ret < 0)
1964 goto err_virtio_init;
1965
1966 if (vectorized) {
1967 if (!vtpci_packed_queue(hw)) {
1968 hw->use_vec_rx = 1;
1969 } else {
1970 #if !defined(CC_AVX512_SUPPORT)
1971 PMD_DRV_LOG(INFO,
1972 "building environment do not support packed ring vectorized");
1973 #else
1974 hw->use_vec_rx = 1;
1975 hw->use_vec_tx = 1;
1976 #endif
1977 }
1978 }
1979
1980 hw->opened = true;
1981
1982 return 0;
1983
1984 err_virtio_init:
1985 if (!hw->virtio_user_dev) {
1986 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1987 if (!hw->modern)
1988 rte_pci_ioport_unmap(VTPCI_IO(hw));
1989 }
1990 err_vtpci_init:
1991 rte_free(eth_dev->data->mac_addrs);
1992 eth_dev->data->mac_addrs = NULL;
1993 return ret;
1994 }
1995
1996 static int
eth_virtio_dev_uninit(struct rte_eth_dev * eth_dev)1997 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1998 {
1999 int ret;
2000 PMD_INIT_FUNC_TRACE();
2001
2002 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
2003 return 0;
2004
2005 ret = virtio_dev_stop(eth_dev);
2006 virtio_dev_close(eth_dev);
2007
2008 PMD_INIT_LOG(DEBUG, "dev_uninit completed");
2009
2010 return ret;
2011 }
2012
2013
vdpa_check_handler(__rte_unused const char * key,const char * value,void * ret_val)2014 static int vdpa_check_handler(__rte_unused const char *key,
2015 const char *value, void *ret_val)
2016 {
2017 if (strcmp(value, "1") == 0)
2018 *(int *)ret_val = 1;
2019 else
2020 *(int *)ret_val = 0;
2021
2022 return 0;
2023 }
2024
2025
2026 static uint32_t
virtio_dev_speed_capa_get(uint32_t speed)2027 virtio_dev_speed_capa_get(uint32_t speed)
2028 {
2029 switch (speed) {
2030 case ETH_SPEED_NUM_10G:
2031 return ETH_LINK_SPEED_10G;
2032 case ETH_SPEED_NUM_20G:
2033 return ETH_LINK_SPEED_20G;
2034 case ETH_SPEED_NUM_25G:
2035 return ETH_LINK_SPEED_25G;
2036 case ETH_SPEED_NUM_40G:
2037 return ETH_LINK_SPEED_40G;
2038 case ETH_SPEED_NUM_50G:
2039 return ETH_LINK_SPEED_50G;
2040 case ETH_SPEED_NUM_56G:
2041 return ETH_LINK_SPEED_56G;
2042 case ETH_SPEED_NUM_100G:
2043 return ETH_LINK_SPEED_100G;
2044 case ETH_SPEED_NUM_200G:
2045 return ETH_LINK_SPEED_200G;
2046 default:
2047 return 0;
2048 }
2049 }
2050
vectorized_check_handler(__rte_unused const char * key,const char * value,void * ret_val)2051 static int vectorized_check_handler(__rte_unused const char *key,
2052 const char *value, void *ret_val)
2053 {
2054 if (strcmp(value, "1") == 0)
2055 *(int *)ret_val = 1;
2056 else
2057 *(int *)ret_val = 0;
2058
2059 return 0;
2060 }
2061
2062 #define VIRTIO_ARG_SPEED "speed"
2063 #define VIRTIO_ARG_VDPA "vdpa"
2064 #define VIRTIO_ARG_VECTORIZED "vectorized"
2065
2066
2067 static int
link_speed_handler(const char * key __rte_unused,const char * value,void * ret_val)2068 link_speed_handler(const char *key __rte_unused,
2069 const char *value, void *ret_val)
2070 {
2071 uint32_t val;
2072 if (!value || !ret_val)
2073 return -EINVAL;
2074 val = strtoul(value, NULL, 0);
2075 /* validate input */
2076 if (virtio_dev_speed_capa_get(val) == 0)
2077 return -EINVAL;
2078 *(uint32_t *)ret_val = val;
2079
2080 return 0;
2081 }
2082
2083
2084 static int
virtio_dev_devargs_parse(struct rte_devargs * devargs,int * vdpa,uint32_t * speed,int * vectorized)2085 virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa,
2086 uint32_t *speed, int *vectorized)
2087 {
2088 struct rte_kvargs *kvlist;
2089 int ret = 0;
2090
2091 if (devargs == NULL)
2092 return 0;
2093
2094 kvlist = rte_kvargs_parse(devargs->args, NULL);
2095 if (kvlist == NULL) {
2096 PMD_INIT_LOG(ERR, "error when parsing param");
2097 return 0;
2098 }
2099 if (vdpa && rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) {
2100 /* vdpa mode selected when there's a key-value pair:
2101 * vdpa=1
2102 */
2103 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA,
2104 vdpa_check_handler, vdpa);
2105 if (ret < 0) {
2106 PMD_INIT_LOG(ERR, "Failed to parse %s",
2107 VIRTIO_ARG_VDPA);
2108 goto exit;
2109 }
2110 }
2111 if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2112 ret = rte_kvargs_process(kvlist,
2113 VIRTIO_ARG_SPEED,
2114 link_speed_handler, speed);
2115 if (ret < 0) {
2116 PMD_INIT_LOG(ERR, "Failed to parse %s",
2117 VIRTIO_ARG_SPEED);
2118 goto exit;
2119 }
2120 }
2121
2122 if (vectorized &&
2123 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2124 ret = rte_kvargs_process(kvlist,
2125 VIRTIO_ARG_VECTORIZED,
2126 vectorized_check_handler, vectorized);
2127 if (ret < 0) {
2128 PMD_INIT_LOG(ERR, "Failed to parse %s",
2129 VIRTIO_ARG_VECTORIZED);
2130 goto exit;
2131 }
2132 }
2133
2134 exit:
2135 rte_kvargs_free(kvlist);
2136 return ret;
2137 }
2138
eth_virtio_pci_probe(struct rte_pci_driver * pci_drv __rte_unused,struct rte_pci_device * pci_dev)2139 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
2140 struct rte_pci_device *pci_dev)
2141 {
2142 int vdpa = 0;
2143 int ret = 0;
2144
2145 ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa, NULL,
2146 NULL);
2147 if (ret < 0) {
2148 PMD_INIT_LOG(ERR, "devargs parsing is failed");
2149 return ret;
2150 }
2151 /* virtio pmd skips probe if device needs to work in vdpa mode */
2152 if (vdpa == 1)
2153 return 1;
2154
2155 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
2156 eth_virtio_dev_init);
2157 }
2158
eth_virtio_pci_remove(struct rte_pci_device * pci_dev)2159 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
2160 {
2161 int ret;
2162
2163 ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
2164 /* Port has already been released by close. */
2165 if (ret == -ENODEV)
2166 ret = 0;
2167 return ret;
2168 }
2169
2170 static struct rte_pci_driver rte_virtio_pmd = {
2171 .driver = {
2172 .name = "net_virtio",
2173 },
2174 .id_table = pci_id_virtio_map,
2175 .drv_flags = 0,
2176 .probe = eth_virtio_pci_probe,
2177 .remove = eth_virtio_pci_remove,
2178 };
2179
RTE_INIT(rte_virtio_pmd_init)2180 RTE_INIT(rte_virtio_pmd_init)
2181 {
2182 rte_eal_iopl_init();
2183 rte_pci_register(&rte_virtio_pmd);
2184 }
2185
2186 static bool
rx_offload_enabled(struct virtio_hw * hw)2187 rx_offload_enabled(struct virtio_hw *hw)
2188 {
2189 return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2190 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2191 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2192 }
2193
2194 static bool
tx_offload_enabled(struct virtio_hw * hw)2195 tx_offload_enabled(struct virtio_hw *hw)
2196 {
2197 return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2198 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2199 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2200 }
2201
2202 /*
2203 * Configure virtio device
2204 * It returns 0 on success.
2205 */
2206 static int
virtio_dev_configure(struct rte_eth_dev * dev)2207 virtio_dev_configure(struct rte_eth_dev *dev)
2208 {
2209 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2210 const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2211 struct virtio_hw *hw = dev->data->dev_private;
2212 uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2213 hw->vtnet_hdr_size;
2214 uint64_t rx_offloads = rxmode->offloads;
2215 uint64_t tx_offloads = txmode->offloads;
2216 uint64_t req_features;
2217 int ret;
2218
2219 PMD_INIT_LOG(DEBUG, "configure");
2220 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2221
2222 if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2223 PMD_DRV_LOG(ERR,
2224 "Unsupported Rx multi queue mode %d",
2225 rxmode->mq_mode);
2226 return -EINVAL;
2227 }
2228
2229 if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2230 PMD_DRV_LOG(ERR,
2231 "Unsupported Tx multi queue mode %d",
2232 txmode->mq_mode);
2233 return -EINVAL;
2234 }
2235
2236 if (dev->data->dev_conf.intr_conf.rxq) {
2237 ret = virtio_init_device(dev, hw->req_guest_features);
2238 if (ret < 0)
2239 return ret;
2240 }
2241
2242 if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2243 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2244
2245 if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2246 DEV_RX_OFFLOAD_TCP_CKSUM))
2247 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2248
2249 if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2250 req_features |=
2251 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2252 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2253
2254 if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2255 DEV_TX_OFFLOAD_TCP_CKSUM))
2256 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2257
2258 if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2259 req_features |=
2260 (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2261 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2262
2263 /* if request features changed, reinit the device */
2264 if (req_features != hw->req_guest_features) {
2265 ret = virtio_init_device(dev, req_features);
2266 if (ret < 0)
2267 return ret;
2268 }
2269
2270 if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2271 DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2272 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2273 PMD_DRV_LOG(ERR,
2274 "rx checksum not available on this host");
2275 return -ENOTSUP;
2276 }
2277
2278 if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2279 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2280 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2281 PMD_DRV_LOG(ERR,
2282 "Large Receive Offload not available on this host");
2283 return -ENOTSUP;
2284 }
2285
2286 /* start control queue */
2287 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2288 virtio_dev_cq_start(dev);
2289
2290 if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2291 hw->vlan_strip = 1;
2292
2293 if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2294 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2295 PMD_DRV_LOG(ERR,
2296 "vlan filtering not available on this host");
2297 return -ENOTSUP;
2298 }
2299
2300 hw->has_tx_offload = tx_offload_enabled(hw);
2301 hw->has_rx_offload = rx_offload_enabled(hw);
2302
2303 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2304 /* Enable vector (0) for Link State Intrerrupt */
2305 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2306 VIRTIO_MSI_NO_VECTOR) {
2307 PMD_DRV_LOG(ERR, "failed to set config vector");
2308 return -EBUSY;
2309 }
2310
2311 if (vtpci_packed_queue(hw)) {
2312 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2313 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2314 (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2315 !vtpci_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2316 !vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
2317 rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_512)) {
2318 PMD_DRV_LOG(INFO,
2319 "disabled packed ring vectorized path for requirements not met");
2320 hw->use_vec_rx = 0;
2321 hw->use_vec_tx = 0;
2322 }
2323 #else
2324 hw->use_vec_rx = 0;
2325 hw->use_vec_tx = 0;
2326 #endif
2327
2328 if (hw->use_vec_rx) {
2329 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2330 PMD_DRV_LOG(INFO,
2331 "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2332 hw->use_vec_rx = 0;
2333 }
2334
2335 if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2336 PMD_DRV_LOG(INFO,
2337 "disabled packed ring vectorized rx for TCP_LRO enabled");
2338 hw->use_vec_rx = 0;
2339 }
2340 }
2341 } else {
2342 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2343 hw->use_inorder_tx = 1;
2344 hw->use_inorder_rx = 1;
2345 hw->use_vec_rx = 0;
2346 }
2347
2348 if (hw->use_vec_rx) {
2349 #if defined RTE_ARCH_ARM
2350 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2351 PMD_DRV_LOG(INFO,
2352 "disabled split ring vectorized path for requirement not met");
2353 hw->use_vec_rx = 0;
2354 }
2355 #endif
2356 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2357 PMD_DRV_LOG(INFO,
2358 "disabled split ring vectorized rx for mrg_rxbuf enabled");
2359 hw->use_vec_rx = 0;
2360 }
2361
2362 if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2363 DEV_RX_OFFLOAD_TCP_CKSUM |
2364 DEV_RX_OFFLOAD_TCP_LRO |
2365 DEV_RX_OFFLOAD_VLAN_STRIP)) {
2366 PMD_DRV_LOG(INFO,
2367 "disabled split ring vectorized rx for offloading enabled");
2368 hw->use_vec_rx = 0;
2369 }
2370
2371 if (rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128) {
2372 PMD_DRV_LOG(INFO,
2373 "disabled split ring vectorized rx, max SIMD bitwidth too low");
2374 hw->use_vec_rx = 0;
2375 }
2376 }
2377 }
2378
2379 return 0;
2380 }
2381
2382
2383 static int
virtio_dev_start(struct rte_eth_dev * dev)2384 virtio_dev_start(struct rte_eth_dev *dev)
2385 {
2386 uint16_t nb_queues, i;
2387 struct virtnet_rx *rxvq;
2388 struct virtnet_tx *txvq __rte_unused;
2389 struct virtio_hw *hw = dev->data->dev_private;
2390 int ret;
2391
2392 /* Finish the initialization of the queues */
2393 for (i = 0; i < dev->data->nb_rx_queues; i++) {
2394 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2395 if (ret < 0)
2396 return ret;
2397 }
2398 for (i = 0; i < dev->data->nb_tx_queues; i++) {
2399 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2400 if (ret < 0)
2401 return ret;
2402 }
2403
2404 /* check if lsc interrupt feature is enabled */
2405 if (dev->data->dev_conf.intr_conf.lsc) {
2406 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2407 PMD_DRV_LOG(ERR, "link status not supported by host");
2408 return -ENOTSUP;
2409 }
2410 }
2411
2412 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2413 * in device configure, but it could be unmapped when device is
2414 * stopped.
2415 */
2416 if (dev->data->dev_conf.intr_conf.lsc ||
2417 dev->data->dev_conf.intr_conf.rxq) {
2418 virtio_intr_disable(dev);
2419
2420 /* Setup interrupt callback */
2421 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2422 rte_intr_callback_register(dev->intr_handle,
2423 virtio_interrupt_handler,
2424 dev);
2425
2426 if (virtio_intr_enable(dev) < 0) {
2427 PMD_DRV_LOG(ERR, "interrupt enable failed");
2428 return -EIO;
2429 }
2430 }
2431
2432 /*Notify the backend
2433 *Otherwise the tap backend might already stop its queue due to fullness.
2434 *vhost backend will have no chance to be waked up
2435 */
2436 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2437 if (hw->max_queue_pairs > 1) {
2438 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2439 return -EINVAL;
2440 }
2441
2442 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2443
2444 for (i = 0; i < dev->data->nb_rx_queues; i++) {
2445 rxvq = dev->data->rx_queues[i];
2446 /* Flush the old packets */
2447 virtqueue_rxvq_flush(rxvq->vq);
2448 virtqueue_notify(rxvq->vq);
2449 }
2450
2451 for (i = 0; i < dev->data->nb_tx_queues; i++) {
2452 txvq = dev->data->tx_queues[i];
2453 virtqueue_notify(txvq->vq);
2454 }
2455
2456 PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2457
2458 for (i = 0; i < dev->data->nb_rx_queues; i++) {
2459 rxvq = dev->data->rx_queues[i];
2460 VIRTQUEUE_DUMP(rxvq->vq);
2461 }
2462
2463 for (i = 0; i < dev->data->nb_tx_queues; i++) {
2464 txvq = dev->data->tx_queues[i];
2465 VIRTQUEUE_DUMP(txvq->vq);
2466 }
2467
2468 set_rxtx_funcs(dev);
2469 hw->started = true;
2470
2471 /* Initialize Link state */
2472 virtio_dev_link_update(dev, 0);
2473
2474 return 0;
2475 }
2476
virtio_dev_free_mbufs(struct rte_eth_dev * dev)2477 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2478 {
2479 struct virtio_hw *hw = dev->data->dev_private;
2480 uint16_t nr_vq = virtio_get_nr_vq(hw);
2481 const char *type __rte_unused;
2482 unsigned int i, mbuf_num = 0;
2483 struct virtqueue *vq;
2484 struct rte_mbuf *buf;
2485 int queue_type;
2486
2487 if (hw->vqs == NULL)
2488 return;
2489
2490 for (i = 0; i < nr_vq; i++) {
2491 vq = hw->vqs[i];
2492 if (!vq)
2493 continue;
2494
2495 queue_type = virtio_get_queue_type(hw, i);
2496 if (queue_type == VTNET_RQ)
2497 type = "rxq";
2498 else if (queue_type == VTNET_TQ)
2499 type = "txq";
2500 else
2501 continue;
2502
2503 PMD_INIT_LOG(DEBUG,
2504 "Before freeing %s[%d] used and unused buf",
2505 type, i);
2506 VIRTQUEUE_DUMP(vq);
2507
2508 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2509 rte_pktmbuf_free(buf);
2510 mbuf_num++;
2511 }
2512
2513 PMD_INIT_LOG(DEBUG,
2514 "After freeing %s[%d] used and unused buf",
2515 type, i);
2516 VIRTQUEUE_DUMP(vq);
2517 }
2518
2519 PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2520 }
2521
2522 /*
2523 * Stop device: disable interrupt and mark link down
2524 */
2525 static int
virtio_dev_stop(struct rte_eth_dev * dev)2526 virtio_dev_stop(struct rte_eth_dev *dev)
2527 {
2528 struct virtio_hw *hw = dev->data->dev_private;
2529 struct rte_eth_link link;
2530 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2531
2532 PMD_INIT_LOG(DEBUG, "stop");
2533 dev->data->dev_started = 0;
2534
2535 rte_spinlock_lock(&hw->state_lock);
2536 if (!hw->started)
2537 goto out_unlock;
2538 hw->started = false;
2539
2540 if (intr_conf->lsc || intr_conf->rxq) {
2541 virtio_intr_disable(dev);
2542
2543 /* Reset interrupt callback */
2544 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2545 rte_intr_callback_unregister(dev->intr_handle,
2546 virtio_interrupt_handler,
2547 dev);
2548 }
2549 }
2550
2551 memset(&link, 0, sizeof(link));
2552 rte_eth_linkstatus_set(dev, &link);
2553 out_unlock:
2554 rte_spinlock_unlock(&hw->state_lock);
2555
2556 return 0;
2557 }
2558
2559 static int
virtio_dev_link_update(struct rte_eth_dev * dev,__rte_unused int wait_to_complete)2560 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2561 {
2562 struct rte_eth_link link;
2563 uint16_t status;
2564 struct virtio_hw *hw = dev->data->dev_private;
2565
2566 memset(&link, 0, sizeof(link));
2567 link.link_duplex = hw->duplex;
2568 link.link_speed = hw->speed;
2569 link.link_autoneg = ETH_LINK_AUTONEG;
2570
2571 if (!hw->started) {
2572 link.link_status = ETH_LINK_DOWN;
2573 link.link_speed = ETH_SPEED_NUM_NONE;
2574 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2575 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2576 vtpci_read_dev_config(hw,
2577 offsetof(struct virtio_net_config, status),
2578 &status, sizeof(status));
2579 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2580 link.link_status = ETH_LINK_DOWN;
2581 link.link_speed = ETH_SPEED_NUM_NONE;
2582 PMD_INIT_LOG(DEBUG, "Port %d is down",
2583 dev->data->port_id);
2584 } else {
2585 link.link_status = ETH_LINK_UP;
2586 PMD_INIT_LOG(DEBUG, "Port %d is up",
2587 dev->data->port_id);
2588 }
2589 } else {
2590 link.link_status = ETH_LINK_UP;
2591 }
2592
2593 return rte_eth_linkstatus_set(dev, &link);
2594 }
2595
2596 static int
virtio_dev_vlan_offload_set(struct rte_eth_dev * dev,int mask)2597 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2598 {
2599 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2600 struct virtio_hw *hw = dev->data->dev_private;
2601 uint64_t offloads = rxmode->offloads;
2602
2603 if (mask & ETH_VLAN_FILTER_MASK) {
2604 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2605 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2606
2607 PMD_DRV_LOG(NOTICE,
2608 "vlan filtering not available on this host");
2609
2610 return -ENOTSUP;
2611 }
2612 }
2613
2614 if (mask & ETH_VLAN_STRIP_MASK)
2615 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2616
2617 return 0;
2618 }
2619
2620 static int
virtio_dev_info_get(struct rte_eth_dev * dev,struct rte_eth_dev_info * dev_info)2621 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2622 {
2623 uint64_t tso_mask, host_features;
2624 struct virtio_hw *hw = dev->data->dev_private;
2625 dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2626
2627 dev_info->max_rx_queues =
2628 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2629 dev_info->max_tx_queues =
2630 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2631 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2632 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2633 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2634
2635 host_features = VTPCI_OPS(hw)->get_features(hw);
2636 dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2637 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2638 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2639 dev_info->rx_offload_capa |=
2640 DEV_RX_OFFLOAD_TCP_CKSUM |
2641 DEV_RX_OFFLOAD_UDP_CKSUM;
2642 }
2643 if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2644 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2645 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2646 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2647 if ((host_features & tso_mask) == tso_mask)
2648 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2649
2650 dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2651 DEV_TX_OFFLOAD_VLAN_INSERT;
2652 if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2653 dev_info->tx_offload_capa |=
2654 DEV_TX_OFFLOAD_UDP_CKSUM |
2655 DEV_TX_OFFLOAD_TCP_CKSUM;
2656 }
2657 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2658 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2659 if ((host_features & tso_mask) == tso_mask)
2660 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2661
2662 return 0;
2663 }
2664
2665 /*
2666 * It enables testpmd to collect per queue stats.
2667 */
2668 static int
virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev * eth_dev,__rte_unused uint16_t queue_id,__rte_unused uint8_t stat_idx,__rte_unused uint8_t is_rx)2669 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2670 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2671 __rte_unused uint8_t is_rx)
2672 {
2673 return 0;
2674 }
2675
2676 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2677 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2678 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2679 RTE_LOG_REGISTER(virtio_logtype_init, pmd.net.virtio.init, NOTICE);
2680 RTE_LOG_REGISTER(virtio_logtype_driver, pmd.net.virtio.driver, NOTICE);
2681