f0a0219ca2e0e1c03f5d48020a7d7519e6915d01
[dpdk.git] / drivers / net / virtio / virtio_ethdev.c
1 /*-
2  *   BSD LICENSE
3  *
4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5  *   All rights reserved.
6  *
7  *   Redistribution and use in source and binary forms, with or without
8  *   modification, are permitted provided that the following conditions
9  *   are met:
10  *
11  *     * Redistributions of source code must retain the above copyright
12  *       notice, this list of conditions and the following disclaimer.
13  *     * Redistributions in binary form must reproduce the above copyright
14  *       notice, this list of conditions and the following disclaimer in
15  *       the documentation and/or other materials provided with the
16  *       distribution.
17  *     * Neither the name of Intel Corporation nor the names of its
18  *       contributors may be used to endorse or promote products derived
19  *       from this software without specific prior written permission.
20  *
21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33
34 #include <stdint.h>
35 #include <string.h>
36 #include <stdio.h>
37 #include <errno.h>
38 #include <unistd.h>
39
40 #include <rte_ethdev.h>
41 #include <rte_ethdev_pci.h>
42 #include <rte_memcpy.h>
43 #include <rte_string_fns.h>
44 #include <rte_memzone.h>
45 #include <rte_malloc.h>
46 #include <rte_atomic.h>
47 #include <rte_branch_prediction.h>
48 #include <rte_pci.h>
49 #include <rte_ether.h>
50 #include <rte_common.h>
51 #include <rte_errno.h>
52
53 #include <rte_memory.h>
54 #include <rte_eal.h>
55 #include <rte_dev.h>
56
57 #include "virtio_ethdev.h"
58 #include "virtio_pci.h"
59 #include "virtio_logs.h"
60 #include "virtqueue.h"
61 #include "virtio_rxtx.h"
62
63 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
64 static int  virtio_dev_configure(struct rte_eth_dev *dev);
65 static int  virtio_dev_start(struct rte_eth_dev *dev);
66 static void virtio_dev_stop(struct rte_eth_dev *dev);
67 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
68 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
69 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
70 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
71 static void virtio_dev_info_get(struct rte_eth_dev *dev,
72                                 struct rte_eth_dev_info *dev_info);
73 static int virtio_dev_link_update(struct rte_eth_dev *dev,
74         __rte_unused int wait_to_complete);
75
76 static void virtio_set_hwaddr(struct virtio_hw *hw);
77 static void virtio_get_hwaddr(struct virtio_hw *hw);
78
79 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
80                                  struct rte_eth_stats *stats);
81 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
82                                  struct rte_eth_xstat *xstats, unsigned n);
83 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
84                                        struct rte_eth_xstat_name *xstats_names,
85                                        unsigned limit);
86 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
87 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
88 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
89                                 uint16_t vlan_id, int on);
90 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
91                                 struct ether_addr *mac_addr,
92                                 uint32_t index, uint32_t vmdq __rte_unused);
93 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
94 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
95                                 struct ether_addr *mac_addr);
96
97 static int virtio_dev_queue_stats_mapping_set(
98         __rte_unused struct rte_eth_dev *eth_dev,
99         __rte_unused uint16_t queue_id,
100         __rte_unused uint8_t stat_idx,
101         __rte_unused uint8_t is_rx);
102
103 /*
104  * The set of PCI devices this driver supports
105  */
106 static const struct rte_pci_id pci_id_virtio_map[] = {
107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
108         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
109         { .vendor_id = 0, /* sentinel */ },
110 };
111
112 struct rte_virtio_xstats_name_off {
113         char name[RTE_ETH_XSTATS_NAME_SIZE];
114         unsigned offset;
115 };
116
117 /* [rt]x_qX_ is prepended to the name string here */
118 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
119         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
120         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
121         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
122         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
123         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
124         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
125         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
126         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
127         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
128         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
129         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
130         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
131         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
132 };
133
134 /* [rt]x_qX_ is prepended to the name string here */
135 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
136         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
137         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
138         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
139         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
140         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
141         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
142         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
143         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
144         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
145         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
146         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
147         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
148         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
149 };
150
151 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
152                             sizeof(rte_virtio_rxq_stat_strings[0]))
153 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
154                             sizeof(rte_virtio_txq_stat_strings[0]))
155
156 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
157
158 static int
159 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
160                 int *dlen, int pkt_num)
161 {
162         uint32_t head, i;
163         int k, sum = 0;
164         virtio_net_ctrl_ack status = ~0;
165         struct virtio_pmd_ctrl result;
166         struct virtqueue *vq;
167
168         ctrl->status = status;
169
170         if (!cvq || !cvq->vq) {
171                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
172                 return -1;
173         }
174         vq = cvq->vq;
175         head = vq->vq_desc_head_idx;
176
177         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
178                 "vq->hw->cvq = %p vq = %p",
179                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
180
181         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
182                 return -1;
183
184         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
185                 sizeof(struct virtio_pmd_ctrl));
186
187         /*
188          * Format is enforced in qemu code:
189          * One TX packet for header;
190          * At least one TX packet per argument;
191          * One RX packet for ACK.
192          */
193         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
194         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
195         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
196         vq->vq_free_cnt--;
197         i = vq->vq_ring.desc[head].next;
198
199         for (k = 0; k < pkt_num; k++) {
200                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
201                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
202                         + sizeof(struct virtio_net_ctrl_hdr)
203                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
204                 vq->vq_ring.desc[i].len = dlen[k];
205                 sum += dlen[k];
206                 vq->vq_free_cnt--;
207                 i = vq->vq_ring.desc[i].next;
208         }
209
210         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
211         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
212                         + sizeof(struct virtio_net_ctrl_hdr);
213         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
214         vq->vq_free_cnt--;
215
216         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
217
218         vq_update_avail_ring(vq, head);
219         vq_update_avail_idx(vq);
220
221         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
222
223         virtqueue_notify(vq);
224
225         rte_rmb();
226         while (VIRTQUEUE_NUSED(vq) == 0) {
227                 rte_rmb();
228                 usleep(100);
229         }
230
231         while (VIRTQUEUE_NUSED(vq)) {
232                 uint32_t idx, desc_idx, used_idx;
233                 struct vring_used_elem *uep;
234
235                 used_idx = (uint32_t)(vq->vq_used_cons_idx
236                                 & (vq->vq_nentries - 1));
237                 uep = &vq->vq_ring.used->ring[used_idx];
238                 idx = (uint32_t) uep->id;
239                 desc_idx = idx;
240
241                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
242                         desc_idx = vq->vq_ring.desc[desc_idx].next;
243                         vq->vq_free_cnt++;
244                 }
245
246                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
247                 vq->vq_desc_head_idx = idx;
248
249                 vq->vq_used_cons_idx++;
250                 vq->vq_free_cnt++;
251         }
252
253         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
254                         vq->vq_free_cnt, vq->vq_desc_head_idx);
255
256         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
257                         sizeof(struct virtio_pmd_ctrl));
258
259         return result.status;
260 }
261
262 static int
263 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
264 {
265         struct virtio_hw *hw = dev->data->dev_private;
266         struct virtio_pmd_ctrl ctrl;
267         int dlen[1];
268         int ret;
269
270         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
271         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
272         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
273
274         dlen[0] = sizeof(uint16_t);
275
276         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
277         if (ret) {
278                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
279                           "failed, this is too late now...");
280                 return -EINVAL;
281         }
282
283         return 0;
284 }
285
286 static void
287 virtio_dev_queue_release(void *queue __rte_unused)
288 {
289         /* do nothing */
290 }
291
292 static int
293 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
294 {
295         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
296                 return VTNET_CQ;
297         else if (vtpci_queue_idx % 2 == 0)
298                 return VTNET_RQ;
299         else
300                 return VTNET_TQ;
301 }
302
303 static uint16_t
304 virtio_get_nr_vq(struct virtio_hw *hw)
305 {
306         uint16_t nr_vq = hw->max_queue_pairs * 2;
307
308         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
309                 nr_vq += 1;
310
311         return nr_vq;
312 }
313
314 static void
315 virtio_init_vring(struct virtqueue *vq)
316 {
317         int size = vq->vq_nentries;
318         struct vring *vr = &vq->vq_ring;
319         uint8_t *ring_mem = vq->vq_ring_virt_mem;
320
321         PMD_INIT_FUNC_TRACE();
322
323         /*
324          * Reinitialise since virtio port might have been stopped and restarted
325          */
326         memset(ring_mem, 0, vq->vq_ring_size);
327         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
328         vq->vq_used_cons_idx = 0;
329         vq->vq_desc_head_idx = 0;
330         vq->vq_avail_idx = 0;
331         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
332         vq->vq_free_cnt = vq->vq_nentries;
333         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
334
335         vring_desc_init(vr->desc, size);
336
337         /*
338          * Disable device(host) interrupting guest
339          */
340         virtqueue_disable_intr(vq);
341 }
342
343 static int
344 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
345 {
346         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
347         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
348         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
349         unsigned int vq_size, size;
350         struct virtio_hw *hw = dev->data->dev_private;
351         struct virtnet_rx *rxvq = NULL;
352         struct virtnet_tx *txvq = NULL;
353         struct virtnet_ctl *cvq = NULL;
354         struct virtqueue *vq;
355         size_t sz_hdr_mz = 0;
356         void *sw_ring = NULL;
357         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
358         int ret;
359
360         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
361
362         /*
363          * Read the virtqueue size from the Queue Size field
364          * Always power of 2 and if 0 virtqueue does not exist
365          */
366         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
367         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
368         if (vq_size == 0) {
369                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
370                 return -EINVAL;
371         }
372
373         if (!rte_is_power_of_2(vq_size)) {
374                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
375                 return -EINVAL;
376         }
377
378         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
379                  dev->data->port_id, vtpci_queue_idx);
380
381         size = RTE_ALIGN_CEIL(sizeof(*vq) +
382                                 vq_size * sizeof(struct vq_desc_extra),
383                                 RTE_CACHE_LINE_SIZE);
384         if (queue_type == VTNET_TQ) {
385                 /*
386                  * For each xmit packet, allocate a virtio_net_hdr
387                  * and indirect ring elements
388                  */
389                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
390         } else if (queue_type == VTNET_CQ) {
391                 /* Allocate a page for control vq command, data and status */
392                 sz_hdr_mz = PAGE_SIZE;
393         }
394
395         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
396                                 SOCKET_ID_ANY);
397         if (vq == NULL) {
398                 PMD_INIT_LOG(ERR, "can not allocate vq");
399                 return -ENOMEM;
400         }
401         hw->vqs[vtpci_queue_idx] = vq;
402
403         vq->hw = hw;
404         vq->vq_queue_index = vtpci_queue_idx;
405         vq->vq_nentries = vq_size;
406
407         /*
408          * Reserve a memzone for vring elements
409          */
410         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
411         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
412         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
413                      size, vq->vq_ring_size);
414
415         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
416                                          SOCKET_ID_ANY,
417                                          0, VIRTIO_PCI_VRING_ALIGN);
418         if (mz == NULL) {
419                 if (rte_errno == EEXIST)
420                         mz = rte_memzone_lookup(vq_name);
421                 if (mz == NULL) {
422                         ret = -ENOMEM;
423                         goto fail_q_alloc;
424                 }
425         }
426
427         memset(mz->addr, 0, sizeof(mz->len));
428
429         vq->vq_ring_mem = mz->phys_addr;
430         vq->vq_ring_virt_mem = mz->addr;
431         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
432                      (uint64_t)mz->phys_addr);
433         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
434                      (uint64_t)(uintptr_t)mz->addr);
435
436         virtio_init_vring(vq);
437
438         if (sz_hdr_mz) {
439                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
440                          dev->data->port_id, vtpci_queue_idx);
441                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
442                                                      SOCKET_ID_ANY, 0,
443                                                      RTE_CACHE_LINE_SIZE);
444                 if (hdr_mz == NULL) {
445                         if (rte_errno == EEXIST)
446                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
447                         if (hdr_mz == NULL) {
448                                 ret = -ENOMEM;
449                                 goto fail_q_alloc;
450                         }
451                 }
452         }
453
454         if (queue_type == VTNET_RQ) {
455                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
456                                sizeof(vq->sw_ring[0]);
457
458                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
459                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
460                 if (!sw_ring) {
461                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
462                         ret = -ENOMEM;
463                         goto fail_q_alloc;
464                 }
465
466                 vq->sw_ring = sw_ring;
467                 rxvq = &vq->rxq;
468                 rxvq->vq = vq;
469                 rxvq->port_id = dev->data->port_id;
470                 rxvq->mz = mz;
471         } else if (queue_type == VTNET_TQ) {
472                 txvq = &vq->txq;
473                 txvq->vq = vq;
474                 txvq->port_id = dev->data->port_id;
475                 txvq->mz = mz;
476                 txvq->virtio_net_hdr_mz = hdr_mz;
477                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
478         } else if (queue_type == VTNET_CQ) {
479                 cvq = &vq->cq;
480                 cvq->vq = vq;
481                 cvq->mz = mz;
482                 cvq->virtio_net_hdr_mz = hdr_mz;
483                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
484                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
485
486                 hw->cvq = cvq;
487         }
488
489         /* For virtio_user case (that is when hw->dev is NULL), we use
490          * virtual address. And we need properly set _offset_, please see
491          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
492          */
493         if (!hw->virtio_user_dev)
494                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
495         else {
496                 vq->vq_ring_mem = (uintptr_t)mz->addr;
497                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
498                 if (queue_type == VTNET_TQ)
499                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
500                 else if (queue_type == VTNET_CQ)
501                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
502         }
503
504         if (queue_type == VTNET_TQ) {
505                 struct virtio_tx_region *txr;
506                 unsigned int i;
507
508                 txr = hdr_mz->addr;
509                 memset(txr, 0, vq_size * sizeof(*txr));
510                 for (i = 0; i < vq_size; i++) {
511                         struct vring_desc *start_dp = txr[i].tx_indir;
512
513                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
514
515                         /* first indirect descriptor is always the tx header */
516                         start_dp->addr = txvq->virtio_net_hdr_mem
517                                 + i * sizeof(*txr)
518                                 + offsetof(struct virtio_tx_region, tx_hdr);
519
520                         start_dp->len = hw->vtnet_hdr_size;
521                         start_dp->flags = VRING_DESC_F_NEXT;
522                 }
523         }
524
525         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
526                 PMD_INIT_LOG(ERR, "setup_queue failed");
527                 return -EINVAL;
528         }
529
530         return 0;
531
532 fail_q_alloc:
533         rte_free(sw_ring);
534         rte_memzone_free(hdr_mz);
535         rte_memzone_free(mz);
536         rte_free(vq);
537
538         return ret;
539 }
540
541 static void
542 virtio_free_queues(struct virtio_hw *hw)
543 {
544         uint16_t nr_vq = virtio_get_nr_vq(hw);
545         struct virtqueue *vq;
546         int queue_type;
547         uint16_t i;
548
549         for (i = 0; i < nr_vq; i++) {
550                 vq = hw->vqs[i];
551                 if (!vq)
552                         continue;
553
554                 queue_type = virtio_get_queue_type(hw, i);
555                 if (queue_type == VTNET_RQ) {
556                         rte_free(vq->sw_ring);
557                         rte_memzone_free(vq->rxq.mz);
558                 } else if (queue_type == VTNET_TQ) {
559                         rte_memzone_free(vq->txq.mz);
560                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
561                 } else {
562                         rte_memzone_free(vq->cq.mz);
563                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
564                 }
565
566                 rte_free(vq);
567         }
568
569         rte_free(hw->vqs);
570 }
571
572 static int
573 virtio_alloc_queues(struct rte_eth_dev *dev)
574 {
575         struct virtio_hw *hw = dev->data->dev_private;
576         uint16_t nr_vq = virtio_get_nr_vq(hw);
577         uint16_t i;
578         int ret;
579
580         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
581         if (!hw->vqs) {
582                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
583                 return -ENOMEM;
584         }
585
586         for (i = 0; i < nr_vq; i++) {
587                 ret = virtio_init_queue(dev, i);
588                 if (ret < 0) {
589                         virtio_free_queues(hw);
590                         return ret;
591                 }
592         }
593
594         return 0;
595 }
596
597 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
598
599 static void
600 virtio_dev_close(struct rte_eth_dev *dev)
601 {
602         struct virtio_hw *hw = dev->data->dev_private;
603         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
604
605         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
606
607         /* reset the NIC */
608         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
609                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
610         if (intr_conf->rxq)
611                 virtio_queues_unbind_intr(dev);
612
613         if (intr_conf->lsc || intr_conf->rxq) {
614                 rte_intr_disable(dev->intr_handle);
615                 rte_intr_efd_disable(dev->intr_handle);
616                 rte_free(dev->intr_handle->intr_vec);
617                 dev->intr_handle->intr_vec = NULL;
618         }
619
620         vtpci_reset(hw);
621         virtio_dev_free_mbufs(dev);
622         virtio_free_queues(hw);
623 }
624
625 static void
626 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
627 {
628         struct virtio_hw *hw = dev->data->dev_private;
629         struct virtio_pmd_ctrl ctrl;
630         int dlen[1];
631         int ret;
632
633         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
634                 PMD_INIT_LOG(INFO, "host does not support rx control");
635                 return;
636         }
637
638         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
639         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
640         ctrl.data[0] = 1;
641         dlen[0] = 1;
642
643         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
644         if (ret)
645                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
646 }
647
648 static void
649 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
650 {
651         struct virtio_hw *hw = dev->data->dev_private;
652         struct virtio_pmd_ctrl ctrl;
653         int dlen[1];
654         int ret;
655
656         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
657                 PMD_INIT_LOG(INFO, "host does not support rx control");
658                 return;
659         }
660
661         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
662         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
663         ctrl.data[0] = 0;
664         dlen[0] = 1;
665
666         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
667         if (ret)
668                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
669 }
670
671 static void
672 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
673 {
674         struct virtio_hw *hw = dev->data->dev_private;
675         struct virtio_pmd_ctrl ctrl;
676         int dlen[1];
677         int ret;
678
679         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
680                 PMD_INIT_LOG(INFO, "host does not support rx control");
681                 return;
682         }
683
684         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
685         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
686         ctrl.data[0] = 1;
687         dlen[0] = 1;
688
689         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
690         if (ret)
691                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
692 }
693
694 static void
695 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
696 {
697         struct virtio_hw *hw = dev->data->dev_private;
698         struct virtio_pmd_ctrl ctrl;
699         int dlen[1];
700         int ret;
701
702         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
703                 PMD_INIT_LOG(INFO, "host does not support rx control");
704                 return;
705         }
706
707         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
708         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
709         ctrl.data[0] = 0;
710         dlen[0] = 1;
711
712         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
713         if (ret)
714                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
715 }
716
717 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
718 static int
719 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
720 {
721         struct virtio_hw *hw = dev->data->dev_private;
722         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
723                                  hw->vtnet_hdr_size;
724         uint32_t frame_size = mtu + ether_hdr_len;
725         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
726
727         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
728
729         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
730                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
731                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
732                 return -EINVAL;
733         }
734         return 0;
735 }
736
737 static int
738 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
739 {
740         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
741         struct virtqueue *vq = rxvq->vq;
742
743         virtqueue_enable_intr(vq);
744         return 0;
745 }
746
747 static int
748 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
749 {
750         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
751         struct virtqueue *vq = rxvq->vq;
752
753         virtqueue_disable_intr(vq);
754         return 0;
755 }
756
757 /*
758  * dev_ops for virtio, bare necessities for basic operation
759  */
760 static const struct eth_dev_ops virtio_eth_dev_ops = {
761         .dev_configure           = virtio_dev_configure,
762         .dev_start               = virtio_dev_start,
763         .dev_stop                = virtio_dev_stop,
764         .dev_close               = virtio_dev_close,
765         .promiscuous_enable      = virtio_dev_promiscuous_enable,
766         .promiscuous_disable     = virtio_dev_promiscuous_disable,
767         .allmulticast_enable     = virtio_dev_allmulticast_enable,
768         .allmulticast_disable    = virtio_dev_allmulticast_disable,
769         .mtu_set                 = virtio_mtu_set,
770         .dev_infos_get           = virtio_dev_info_get,
771         .stats_get               = virtio_dev_stats_get,
772         .xstats_get              = virtio_dev_xstats_get,
773         .xstats_get_names        = virtio_dev_xstats_get_names,
774         .stats_reset             = virtio_dev_stats_reset,
775         .xstats_reset            = virtio_dev_stats_reset,
776         .link_update             = virtio_dev_link_update,
777         .rx_queue_setup          = virtio_dev_rx_queue_setup,
778         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
779         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
780         .rx_queue_release        = virtio_dev_queue_release,
781         .rx_descriptor_done      = virtio_dev_rx_queue_done,
782         .tx_queue_setup          = virtio_dev_tx_queue_setup,
783         .tx_queue_release        = virtio_dev_queue_release,
784         /* collect stats per queue */
785         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
786         .vlan_filter_set         = virtio_vlan_filter_set,
787         .mac_addr_add            = virtio_mac_addr_add,
788         .mac_addr_remove         = virtio_mac_addr_remove,
789         .mac_addr_set            = virtio_mac_addr_set,
790 };
791
792 static inline int
793 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
794                                 struct rte_eth_link *link)
795 {
796         struct rte_eth_link *dst = link;
797         struct rte_eth_link *src = &(dev->data->dev_link);
798
799         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
800                         *(uint64_t *)src) == 0)
801                 return -1;
802
803         return 0;
804 }
805
806 /**
807  * Atomically writes the link status information into global
808  * structure rte_eth_dev.
809  *
810  * @param dev
811  *   - Pointer to the structure rte_eth_dev to read from.
812  *   - Pointer to the buffer to be saved with the link status.
813  *
814  * @return
815  *   - On success, zero.
816  *   - On failure, negative value.
817  */
818 static inline int
819 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
820                 struct rte_eth_link *link)
821 {
822         struct rte_eth_link *dst = &(dev->data->dev_link);
823         struct rte_eth_link *src = link;
824
825         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
826                                         *(uint64_t *)src) == 0)
827                 return -1;
828
829         return 0;
830 }
831
832 static void
833 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
834 {
835         unsigned i;
836
837         for (i = 0; i < dev->data->nb_tx_queues; i++) {
838                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
839                 if (txvq == NULL)
840                         continue;
841
842                 stats->opackets += txvq->stats.packets;
843                 stats->obytes += txvq->stats.bytes;
844                 stats->oerrors += txvq->stats.errors;
845
846                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
847                         stats->q_opackets[i] = txvq->stats.packets;
848                         stats->q_obytes[i] = txvq->stats.bytes;
849                 }
850         }
851
852         for (i = 0; i < dev->data->nb_rx_queues; i++) {
853                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
854                 if (rxvq == NULL)
855                         continue;
856
857                 stats->ipackets += rxvq->stats.packets;
858                 stats->ibytes += rxvq->stats.bytes;
859                 stats->ierrors += rxvq->stats.errors;
860
861                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
862                         stats->q_ipackets[i] = rxvq->stats.packets;
863                         stats->q_ibytes[i] = rxvq->stats.bytes;
864                 }
865         }
866
867         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
868 }
869
870 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
871                                        struct rte_eth_xstat_name *xstats_names,
872                                        __rte_unused unsigned limit)
873 {
874         unsigned i;
875         unsigned count = 0;
876         unsigned t;
877
878         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
879                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
880
881         if (xstats_names != NULL) {
882                 /* Note: limit checked in rte_eth_xstats_names() */
883
884                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
885                         struct virtqueue *rxvq = dev->data->rx_queues[i];
886                         if (rxvq == NULL)
887                                 continue;
888                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
889                                 snprintf(xstats_names[count].name,
890                                         sizeof(xstats_names[count].name),
891                                         "rx_q%u_%s", i,
892                                         rte_virtio_rxq_stat_strings[t].name);
893                                 count++;
894                         }
895                 }
896
897                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
898                         struct virtqueue *txvq = dev->data->tx_queues[i];
899                         if (txvq == NULL)
900                                 continue;
901                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
902                                 snprintf(xstats_names[count].name,
903                                         sizeof(xstats_names[count].name),
904                                         "tx_q%u_%s", i,
905                                         rte_virtio_txq_stat_strings[t].name);
906                                 count++;
907                         }
908                 }
909                 return count;
910         }
911         return nstats;
912 }
913
914 static int
915 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
916                       unsigned n)
917 {
918         unsigned i;
919         unsigned count = 0;
920
921         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
922                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
923
924         if (n < nstats)
925                 return nstats;
926
927         for (i = 0; i < dev->data->nb_rx_queues; i++) {
928                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
929
930                 if (rxvq == NULL)
931                         continue;
932
933                 unsigned t;
934
935                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
936                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
937                                 rte_virtio_rxq_stat_strings[t].offset);
938                         xstats[count].id = count;
939                         count++;
940                 }
941         }
942
943         for (i = 0; i < dev->data->nb_tx_queues; i++) {
944                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
945
946                 if (txvq == NULL)
947                         continue;
948
949                 unsigned t;
950
951                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
952                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
953                                 rte_virtio_txq_stat_strings[t].offset);
954                         xstats[count].id = count;
955                         count++;
956                 }
957         }
958
959         return count;
960 }
961
962 static void
963 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
964 {
965         virtio_update_stats(dev, stats);
966 }
967
968 static void
969 virtio_dev_stats_reset(struct rte_eth_dev *dev)
970 {
971         unsigned int i;
972
973         for (i = 0; i < dev->data->nb_tx_queues; i++) {
974                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
975                 if (txvq == NULL)
976                         continue;
977
978                 txvq->stats.packets = 0;
979                 txvq->stats.bytes = 0;
980                 txvq->stats.errors = 0;
981                 txvq->stats.multicast = 0;
982                 txvq->stats.broadcast = 0;
983                 memset(txvq->stats.size_bins, 0,
984                        sizeof(txvq->stats.size_bins[0]) * 8);
985         }
986
987         for (i = 0; i < dev->data->nb_rx_queues; i++) {
988                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
989                 if (rxvq == NULL)
990                         continue;
991
992                 rxvq->stats.packets = 0;
993                 rxvq->stats.bytes = 0;
994                 rxvq->stats.errors = 0;
995                 rxvq->stats.multicast = 0;
996                 rxvq->stats.broadcast = 0;
997                 memset(rxvq->stats.size_bins, 0,
998                        sizeof(rxvq->stats.size_bins[0]) * 8);
999         }
1000 }
1001
1002 static void
1003 virtio_set_hwaddr(struct virtio_hw *hw)
1004 {
1005         vtpci_write_dev_config(hw,
1006                         offsetof(struct virtio_net_config, mac),
1007                         &hw->mac_addr, ETHER_ADDR_LEN);
1008 }
1009
1010 static void
1011 virtio_get_hwaddr(struct virtio_hw *hw)
1012 {
1013         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1014                 vtpci_read_dev_config(hw,
1015                         offsetof(struct virtio_net_config, mac),
1016                         &hw->mac_addr, ETHER_ADDR_LEN);
1017         } else {
1018                 eth_random_addr(&hw->mac_addr[0]);
1019                 virtio_set_hwaddr(hw);
1020         }
1021 }
1022
1023 static void
1024 virtio_mac_table_set(struct virtio_hw *hw,
1025                      const struct virtio_net_ctrl_mac *uc,
1026                      const struct virtio_net_ctrl_mac *mc)
1027 {
1028         struct virtio_pmd_ctrl ctrl;
1029         int err, len[2];
1030
1031         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1032                 PMD_DRV_LOG(INFO, "host does not support mac table");
1033                 return;
1034         }
1035
1036         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1037         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1038
1039         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1040         memcpy(ctrl.data, uc, len[0]);
1041
1042         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1043         memcpy(ctrl.data + len[0], mc, len[1]);
1044
1045         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1046         if (err != 0)
1047                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1048 }
1049
1050 static void
1051 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1052                     uint32_t index, uint32_t vmdq __rte_unused)
1053 {
1054         struct virtio_hw *hw = dev->data->dev_private;
1055         const struct ether_addr *addrs = dev->data->mac_addrs;
1056         unsigned int i;
1057         struct virtio_net_ctrl_mac *uc, *mc;
1058
1059         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1060                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1061                 return;
1062         }
1063
1064         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1065         uc->entries = 0;
1066         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1067         mc->entries = 0;
1068
1069         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1070                 const struct ether_addr *addr
1071                         = (i == index) ? mac_addr : addrs + i;
1072                 struct virtio_net_ctrl_mac *tbl
1073                         = is_multicast_ether_addr(addr) ? mc : uc;
1074
1075                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1076         }
1077
1078         virtio_mac_table_set(hw, uc, mc);
1079 }
1080
1081 static void
1082 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1083 {
1084         struct virtio_hw *hw = dev->data->dev_private;
1085         struct ether_addr *addrs = dev->data->mac_addrs;
1086         struct virtio_net_ctrl_mac *uc, *mc;
1087         unsigned int i;
1088
1089         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1090                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1091                 return;
1092         }
1093
1094         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1095         uc->entries = 0;
1096         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1097         mc->entries = 0;
1098
1099         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1100                 struct virtio_net_ctrl_mac *tbl;
1101
1102                 if (i == index || is_zero_ether_addr(addrs + i))
1103                         continue;
1104
1105                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1106                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1107         }
1108
1109         virtio_mac_table_set(hw, uc, mc);
1110 }
1111
1112 static void
1113 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1114 {
1115         struct virtio_hw *hw = dev->data->dev_private;
1116
1117         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1118
1119         /* Use atomic update if available */
1120         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1121                 struct virtio_pmd_ctrl ctrl;
1122                 int len = ETHER_ADDR_LEN;
1123
1124                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1125                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1126
1127                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1128                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1129         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1130                 virtio_set_hwaddr(hw);
1131 }
1132
1133 static int
1134 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1135 {
1136         struct virtio_hw *hw = dev->data->dev_private;
1137         struct virtio_pmd_ctrl ctrl;
1138         int len;
1139
1140         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1141                 return -ENOTSUP;
1142
1143         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1144         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1145         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1146         len = sizeof(vlan_id);
1147
1148         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1149 }
1150
1151 static int
1152 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1153 {
1154         uint64_t host_features;
1155
1156         /* Prepare guest_features: feature that driver wants to support */
1157         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1158                 req_features);
1159
1160         /* Read device(host) feature bits */
1161         host_features = VTPCI_OPS(hw)->get_features(hw);
1162         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1163                 host_features);
1164
1165         /* If supported, ensure MTU value is valid before acknowledging it. */
1166         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1167                 struct virtio_net_config config;
1168
1169                 vtpci_read_dev_config(hw,
1170                         offsetof(struct virtio_net_config, mtu),
1171                         &config.mtu, sizeof(config.mtu));
1172
1173                 if (config.mtu < ETHER_MIN_MTU)
1174                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1175         }
1176
1177         /*
1178          * Negotiate features: Subset of device feature bits are written back
1179          * guest feature bits.
1180          */
1181         hw->guest_features = req_features;
1182         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1183         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1184                 hw->guest_features);
1185
1186         if (hw->modern) {
1187                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1188                         PMD_INIT_LOG(ERR,
1189                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1190                         return -1;
1191                 }
1192                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1193                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1194                         PMD_INIT_LOG(ERR,
1195                                 "failed to set FEATURES_OK status!");
1196                         return -1;
1197                 }
1198         }
1199
1200         hw->req_guest_features = req_features;
1201
1202         return 0;
1203 }
1204
1205 /*
1206  * Process Virtio Config changed interrupt and call the callback
1207  * if link state changed.
1208  */
1209 void
1210 virtio_interrupt_handler(void *param)
1211 {
1212         struct rte_eth_dev *dev = param;
1213         struct virtio_hw *hw = dev->data->dev_private;
1214         uint8_t isr;
1215
1216         /* Read interrupt status which clears interrupt */
1217         isr = vtpci_isr(hw);
1218         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1219
1220         if (rte_intr_enable(dev->intr_handle) < 0)
1221                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1222
1223         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1224                 if (virtio_dev_link_update(dev, 0) == 0)
1225                         _rte_eth_dev_callback_process(dev,
1226                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1227         }
1228
1229 }
1230
1231 static void
1232 rx_func_get(struct rte_eth_dev *eth_dev)
1233 {
1234         struct virtio_hw *hw = eth_dev->data->dev_private;
1235         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1236                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1237         else
1238                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1239 }
1240
1241 /* Only support 1:1 queue/interrupt mapping so far.
1242  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1243  * interrupt vectors (<N+1).
1244  */
1245 static int
1246 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1247 {
1248         uint32_t i;
1249         struct virtio_hw *hw = dev->data->dev_private;
1250
1251         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1252         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1253                 dev->intr_handle->intr_vec[i] = i + 1;
1254                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1255                                                  VIRTIO_MSI_NO_VECTOR) {
1256                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1257                         return -EBUSY;
1258                 }
1259         }
1260
1261         return 0;
1262 }
1263
1264 static void
1265 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1266 {
1267         uint32_t i;
1268         struct virtio_hw *hw = dev->data->dev_private;
1269
1270         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1271         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1272                 VTPCI_OPS(hw)->set_queue_irq(hw,
1273                                              hw->vqs[i * VTNET_CQ],
1274                                              VIRTIO_MSI_NO_VECTOR);
1275 }
1276
1277 static int
1278 virtio_configure_intr(struct rte_eth_dev *dev)
1279 {
1280         struct virtio_hw *hw = dev->data->dev_private;
1281
1282         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1283                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1284                 return -ENOTSUP;
1285         }
1286
1287         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1288                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1289                 return -1;
1290         }
1291
1292         if (!dev->intr_handle->intr_vec) {
1293                 dev->intr_handle->intr_vec =
1294                         rte_zmalloc("intr_vec",
1295                                     hw->max_queue_pairs * sizeof(int), 0);
1296                 if (!dev->intr_handle->intr_vec) {
1297                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1298                                      hw->max_queue_pairs);
1299                         return -ENOMEM;
1300                 }
1301         }
1302
1303         /* Re-register callback to update max_intr */
1304         rte_intr_callback_unregister(dev->intr_handle,
1305                                      virtio_interrupt_handler,
1306                                      dev);
1307         rte_intr_callback_register(dev->intr_handle,
1308                                    virtio_interrupt_handler,
1309                                    dev);
1310
1311         /* DO NOT try to remove this! This function will enable msix, or QEMU
1312          * will encounter SIGSEGV when DRIVER_OK is sent.
1313          * And for legacy devices, this should be done before queue/vec binding
1314          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1315          * (22) will be ignored.
1316          */
1317         if (rte_intr_enable(dev->intr_handle) < 0) {
1318                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1319                 return -1;
1320         }
1321
1322         if (virtio_queues_bind_intr(dev) < 0) {
1323                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1324                 return -1;
1325         }
1326
1327         return 0;
1328 }
1329
1330 /* reset device and renegotiate features if needed */
1331 static int
1332 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1333 {
1334         struct virtio_hw *hw = eth_dev->data->dev_private;
1335         struct virtio_net_config *config;
1336         struct virtio_net_config local_config;
1337         struct rte_pci_device *pci_dev = NULL;
1338         int ret;
1339
1340         /* Reset the device although not necessary at startup */
1341         vtpci_reset(hw);
1342
1343         /* Tell the host we've noticed this device. */
1344         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1345
1346         /* Tell the host we've known how to drive the device. */
1347         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1348         if (virtio_negotiate_features(hw, req_features) < 0)
1349                 return -1;
1350
1351         if (eth_dev->device) {
1352                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1353                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1354         }
1355
1356         /* If host does not support both status and MSI-X then disable LSC */
1357         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1358                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1359         else
1360                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1361
1362         rx_func_get(eth_dev);
1363
1364         /* Setting up rx_header size for the device */
1365         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1366             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1367                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1368         else
1369                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1370
1371         /* Copy the permanent MAC address to: virtio_hw */
1372         virtio_get_hwaddr(hw);
1373         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1374                         &eth_dev->data->mac_addrs[0]);
1375         PMD_INIT_LOG(DEBUG,
1376                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1377                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1378                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1379
1380         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1381                 config = &local_config;
1382
1383                 vtpci_read_dev_config(hw,
1384                         offsetof(struct virtio_net_config, mac),
1385                         &config->mac, sizeof(config->mac));
1386
1387                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1388                         vtpci_read_dev_config(hw,
1389                                 offsetof(struct virtio_net_config, status),
1390                                 &config->status, sizeof(config->status));
1391                 } else {
1392                         PMD_INIT_LOG(DEBUG,
1393                                      "VIRTIO_NET_F_STATUS is not supported");
1394                         config->status = 0;
1395                 }
1396
1397                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1398                         vtpci_read_dev_config(hw,
1399                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1400                                 &config->max_virtqueue_pairs,
1401                                 sizeof(config->max_virtqueue_pairs));
1402                 } else {
1403                         PMD_INIT_LOG(DEBUG,
1404                                      "VIRTIO_NET_F_MQ is not supported");
1405                         config->max_virtqueue_pairs = 1;
1406                 }
1407
1408                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1409
1410                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1411                         vtpci_read_dev_config(hw,
1412                                 offsetof(struct virtio_net_config, mtu),
1413                                 &config->mtu,
1414                                 sizeof(config->mtu));
1415
1416                         /*
1417                          * MTU value has already been checked at negotiation
1418                          * time, but check again in case it has changed since
1419                          * then, which should not happen.
1420                          */
1421                         if (config->mtu < ETHER_MIN_MTU) {
1422                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1423                                                 config->mtu);
1424                                 return -1;
1425                         }
1426
1427                         hw->max_mtu = config->mtu;
1428                         /* Set initial MTU to maximum one supported by vhost */
1429                         eth_dev->data->mtu = config->mtu;
1430
1431                 } else {
1432                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1433                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1434                 }
1435
1436                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1437                                 config->max_virtqueue_pairs);
1438                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1439                 PMD_INIT_LOG(DEBUG,
1440                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1441                                 config->mac[0], config->mac[1],
1442                                 config->mac[2], config->mac[3],
1443                                 config->mac[4], config->mac[5]);
1444         } else {
1445                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1446                 hw->max_queue_pairs = 1;
1447         }
1448
1449         ret = virtio_alloc_queues(eth_dev);
1450         if (ret < 0)
1451                 return ret;
1452
1453         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1454                 if (virtio_configure_intr(eth_dev) < 0) {
1455                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1456                         return -1;
1457                 }
1458         }
1459
1460         vtpci_reinit_complete(hw);
1461
1462         if (pci_dev)
1463                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1464                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1465                         pci_dev->id.device_id);
1466
1467         return 0;
1468 }
1469
1470 /*
1471  * Remap the PCI device again (IO port map for legacy device and
1472  * memory map for modern device), so that the secondary process
1473  * could have the PCI initiated correctly.
1474  */
1475 static int
1476 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1477 {
1478         if (hw->modern) {
1479                 /*
1480                  * We don't have to re-parse the PCI config space, since
1481                  * rte_eal_pci_map_device() makes sure the mapped address
1482                  * in secondary process would equal to the one mapped in
1483                  * the primary process: error will be returned if that
1484                  * requirement is not met.
1485                  *
1486                  * That said, we could simply reuse all cap pointers
1487                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1488                  * primary process, which is stored in shared memory.
1489                  */
1490                 if (rte_eal_pci_map_device(pci_dev)) {
1491                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1492                         return -1;
1493                 }
1494         } else {
1495                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1496                         return -1;
1497         }
1498
1499         return 0;
1500 }
1501
1502 static void
1503 virtio_set_vtpci_ops(struct virtio_hw *hw)
1504 {
1505 #ifdef RTE_VIRTIO_USER
1506         if (hw->virtio_user_dev)
1507                 VTPCI_OPS(hw) = &virtio_user_ops;
1508         else
1509 #endif
1510         if (hw->modern)
1511                 VTPCI_OPS(hw) = &modern_ops;
1512         else
1513                 VTPCI_OPS(hw) = &legacy_ops;
1514 }
1515
1516 /*
1517  * This function is based on probe() function in virtio_pci.c
1518  * It returns 0 on success.
1519  */
1520 int
1521 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1522 {
1523         struct virtio_hw *hw = eth_dev->data->dev_private;
1524         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1525         int ret;
1526
1527         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1528
1529         eth_dev->dev_ops = &virtio_eth_dev_ops;
1530         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1531
1532         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1533                 if (!hw->virtio_user_dev) {
1534                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1535                                                hw);
1536                         if (ret)
1537                                 return ret;
1538                 }
1539
1540                 virtio_set_vtpci_ops(hw);
1541                 if (hw->use_simple_rxtx) {
1542                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1543                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1544                 } else {
1545                         rx_func_get(eth_dev);
1546                 }
1547                 return 0;
1548         }
1549
1550         /* Allocate memory for storing MAC addresses */
1551         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1552         if (eth_dev->data->mac_addrs == NULL) {
1553                 PMD_INIT_LOG(ERR,
1554                         "Failed to allocate %d bytes needed to store MAC addresses",
1555                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1556                 return -ENOMEM;
1557         }
1558
1559         hw->port_id = eth_dev->data->port_id;
1560         /* For virtio_user case the hw->virtio_user_dev is populated by
1561          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1562          */
1563         if (!hw->virtio_user_dev) {
1564                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw,
1565                                  &dev_flags);
1566                 if (ret)
1567                         return ret;
1568         }
1569
1570         eth_dev->data->dev_flags = dev_flags;
1571
1572         /* reset device and negotiate default features */
1573         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1574         if (ret < 0)
1575                 return ret;
1576
1577         /* Setup interrupt callback  */
1578         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1579                 rte_intr_callback_register(eth_dev->intr_handle,
1580                         virtio_interrupt_handler, eth_dev);
1581
1582         return 0;
1583 }
1584
1585 static int
1586 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1587 {
1588         PMD_INIT_FUNC_TRACE();
1589
1590         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1591                 return -EPERM;
1592
1593         virtio_dev_stop(eth_dev);
1594         virtio_dev_close(eth_dev);
1595
1596         eth_dev->dev_ops = NULL;
1597         eth_dev->tx_pkt_burst = NULL;
1598         eth_dev->rx_pkt_burst = NULL;
1599
1600         rte_free(eth_dev->data->mac_addrs);
1601         eth_dev->data->mac_addrs = NULL;
1602
1603         /* reset interrupt callback  */
1604         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1605                 rte_intr_callback_unregister(eth_dev->intr_handle,
1606                                                 virtio_interrupt_handler,
1607                                                 eth_dev);
1608         if (eth_dev->device)
1609                 rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1610
1611         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1612
1613         return 0;
1614 }
1615
1616 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1617         struct rte_pci_device *pci_dev)
1618 {
1619         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1620                 eth_virtio_dev_init);
1621 }
1622
1623 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1624 {
1625         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1626 }
1627
1628 static struct rte_pci_driver rte_virtio_pmd = {
1629         .driver = {
1630                 .name = "net_virtio",
1631         },
1632         .id_table = pci_id_virtio_map,
1633         .drv_flags = 0,
1634         .probe = eth_virtio_pci_probe,
1635         .remove = eth_virtio_pci_remove,
1636 };
1637
1638 RTE_INIT(rte_virtio_pmd_init);
1639 static void
1640 rte_virtio_pmd_init(void)
1641 {
1642         if (rte_eal_iopl_init() != 0) {
1643                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1644                 return;
1645         }
1646
1647         rte_eal_pci_register(&rte_virtio_pmd);
1648 }
1649
1650 /*
1651  * Configure virtio device
1652  * It returns 0 on success.
1653  */
1654 static int
1655 virtio_dev_configure(struct rte_eth_dev *dev)
1656 {
1657         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1658         struct virtio_hw *hw = dev->data->dev_private;
1659         uint64_t req_features;
1660         int ret;
1661
1662         PMD_INIT_LOG(DEBUG, "configure");
1663         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1664         if (rxmode->hw_ip_checksum)
1665                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1666         if (rxmode->enable_lro)
1667                 req_features |=
1668                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1669                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1670
1671         /* if request features changed, reinit the device */
1672         if (req_features != hw->req_guest_features) {
1673                 ret = virtio_init_device(dev, req_features);
1674                 if (ret < 0)
1675                         return ret;
1676         }
1677
1678         if (rxmode->hw_ip_checksum &&
1679                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1680                 PMD_DRV_LOG(NOTICE,
1681                         "rx ip checksum not available on this host");
1682                 return -ENOTSUP;
1683         }
1684
1685         if (rxmode->enable_lro &&
1686                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1687                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1688                 PMD_DRV_LOG(NOTICE,
1689                         "lro not available on this host");
1690                 return -ENOTSUP;
1691         }
1692
1693         /* start control queue */
1694         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1695                 virtio_dev_cq_start(dev);
1696
1697         hw->vlan_strip = rxmode->hw_vlan_strip;
1698
1699         if (rxmode->hw_vlan_filter
1700             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1701                 PMD_DRV_LOG(NOTICE,
1702                             "vlan filtering not available on this host");
1703                 return -ENOTSUP;
1704         }
1705
1706         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1707                 /* Enable vector (0) for Link State Intrerrupt */
1708                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1709                                 VIRTIO_MSI_NO_VECTOR) {
1710                         PMD_DRV_LOG(ERR, "failed to set config vector");
1711                         return -EBUSY;
1712                 }
1713
1714         return 0;
1715 }
1716
1717
1718 static int
1719 virtio_dev_start(struct rte_eth_dev *dev)
1720 {
1721         uint16_t nb_queues, i;
1722         struct virtnet_rx *rxvq;
1723         struct virtnet_tx *txvq __rte_unused;
1724         struct virtio_hw *hw = dev->data->dev_private;
1725
1726         /* check if lsc interrupt feature is enabled */
1727         if (dev->data->dev_conf.intr_conf.lsc) {
1728                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1729                         PMD_DRV_LOG(ERR, "link status not supported by host");
1730                         return -ENOTSUP;
1731                 }
1732         }
1733
1734         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1735          * in device configure, but it could be unmapped  when device is
1736          * stopped.
1737          */
1738         if (dev->data->dev_conf.intr_conf.lsc ||
1739             dev->data->dev_conf.intr_conf.rxq) {
1740                 rte_intr_disable(dev->intr_handle);
1741
1742                 if (rte_intr_enable(dev->intr_handle) < 0) {
1743                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1744                         return -EIO;
1745                 }
1746         }
1747
1748         /* Initialize Link state */
1749         virtio_dev_link_update(dev, 0);
1750
1751         /*Notify the backend
1752          *Otherwise the tap backend might already stop its queue due to fullness.
1753          *vhost backend will have no chance to be waked up
1754          */
1755         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1756         if (hw->max_queue_pairs > 1) {
1757                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1758                         return -EINVAL;
1759         }
1760
1761         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1762
1763         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1764                 rxvq = dev->data->rx_queues[i];
1765                 virtqueue_notify(rxvq->vq);
1766         }
1767
1768         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1769
1770         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1771                 rxvq = dev->data->rx_queues[i];
1772                 VIRTQUEUE_DUMP(rxvq->vq);
1773         }
1774
1775         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1776                 txvq = dev->data->tx_queues[i];
1777                 VIRTQUEUE_DUMP(txvq->vq);
1778         }
1779
1780         return 0;
1781 }
1782
1783 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1784 {
1785         struct rte_mbuf *buf;
1786         int i, mbuf_num = 0;
1787
1788         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1789                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1790
1791                 PMD_INIT_LOG(DEBUG,
1792                              "Before freeing rxq[%d] used and unused buf", i);
1793                 VIRTQUEUE_DUMP(rxvq->vq);
1794
1795                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1796                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1797                         rte_pktmbuf_free(buf);
1798                         mbuf_num++;
1799                 }
1800
1801                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1802                 PMD_INIT_LOG(DEBUG,
1803                              "After freeing rxq[%d] used and unused buf", i);
1804                 VIRTQUEUE_DUMP(rxvq->vq);
1805         }
1806
1807         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1808                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1809
1810                 PMD_INIT_LOG(DEBUG,
1811                              "Before freeing txq[%d] used and unused bufs",
1812                              i);
1813                 VIRTQUEUE_DUMP(txvq->vq);
1814
1815                 mbuf_num = 0;
1816                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1817                         rte_pktmbuf_free(buf);
1818                         mbuf_num++;
1819                 }
1820
1821                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1822                 PMD_INIT_LOG(DEBUG,
1823                              "After freeing txq[%d] used and unused buf", i);
1824                 VIRTQUEUE_DUMP(txvq->vq);
1825         }
1826 }
1827
1828 /*
1829  * Stop device: disable interrupt and mark link down
1830  */
1831 static void
1832 virtio_dev_stop(struct rte_eth_dev *dev)
1833 {
1834         struct rte_eth_link link;
1835         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1836
1837         PMD_INIT_LOG(DEBUG, "stop");
1838
1839         if (intr_conf->lsc || intr_conf->rxq)
1840                 rte_intr_disable(dev->intr_handle);
1841
1842         memset(&link, 0, sizeof(link));
1843         virtio_dev_atomic_write_link_status(dev, &link);
1844 }
1845
1846 static int
1847 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1848 {
1849         struct rte_eth_link link, old;
1850         uint16_t status;
1851         struct virtio_hw *hw = dev->data->dev_private;
1852         memset(&link, 0, sizeof(link));
1853         virtio_dev_atomic_read_link_status(dev, &link);
1854         old = link;
1855         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1856         link.link_speed  = SPEED_10G;
1857
1858         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1859                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1860                 vtpci_read_dev_config(hw,
1861                                 offsetof(struct virtio_net_config, status),
1862                                 &status, sizeof(status));
1863                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1864                         link.link_status = ETH_LINK_DOWN;
1865                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1866                                      dev->data->port_id);
1867                 } else {
1868                         link.link_status = ETH_LINK_UP;
1869                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1870                                      dev->data->port_id);
1871                 }
1872         } else {
1873                 link.link_status = ETH_LINK_UP;
1874         }
1875         virtio_dev_atomic_write_link_status(dev, &link);
1876
1877         return (old.link_status == link.link_status) ? -1 : 0;
1878 }
1879
1880 static void
1881 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1882 {
1883         uint64_t tso_mask, host_features;
1884         struct virtio_hw *hw = dev->data->dev_private;
1885
1886         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1887
1888         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1889         dev_info->max_rx_queues =
1890                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1891         dev_info->max_tx_queues =
1892                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1893         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1894         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1895         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1896         dev_info->default_txconf = (struct rte_eth_txconf) {
1897                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1898         };
1899
1900         host_features = VTPCI_OPS(hw)->get_features(hw);
1901         dev_info->rx_offload_capa = 0;
1902         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1903                 dev_info->rx_offload_capa |=
1904                         DEV_RX_OFFLOAD_TCP_CKSUM |
1905                         DEV_RX_OFFLOAD_UDP_CKSUM;
1906         }
1907         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1908                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1909         if ((host_features & tso_mask) == tso_mask)
1910                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1911
1912         dev_info->tx_offload_capa = 0;
1913         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1914                 dev_info->tx_offload_capa |=
1915                         DEV_TX_OFFLOAD_UDP_CKSUM |
1916                         DEV_TX_OFFLOAD_TCP_CKSUM;
1917         }
1918         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1919                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1920         if ((hw->guest_features & tso_mask) == tso_mask)
1921                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1922 }
1923
1924 /*
1925  * It enables testpmd to collect per queue stats.
1926  */
1927 static int
1928 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1929 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1930 __rte_unused uint8_t is_rx)
1931 {
1932         return 0;
1933 }
1934
1935 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1936 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1937 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");