68dde08548c3a540860fb26973cb769b2d85775f
[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_memcpy.h>
42 #include <rte_string_fns.h>
43 #include <rte_memzone.h>
44 #include <rte_malloc.h>
45 #include <rte_atomic.h>
46 #include <rte_branch_prediction.h>
47 #include <rte_pci.h>
48 #include <rte_ether.h>
49 #include <rte_common.h>
50 #include <rte_errno.h>
51
52 #include <rte_memory.h>
53 #include <rte_eal.h>
54 #include <rte_dev.h>
55
56 #include "virtio_ethdev.h"
57 #include "virtio_pci.h"
58 #include "virtio_logs.h"
59 #include "virtqueue.h"
60 #include "virtio_rxtx.h"
61
62 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
63 static int  virtio_dev_configure(struct rte_eth_dev *dev);
64 static int  virtio_dev_start(struct rte_eth_dev *dev);
65 static void virtio_dev_stop(struct rte_eth_dev *dev);
66 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
67 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
68 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
69 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
70 static void virtio_dev_info_get(struct rte_eth_dev *dev,
71                                 struct rte_eth_dev_info *dev_info);
72 static int virtio_dev_link_update(struct rte_eth_dev *dev,
73         __rte_unused int wait_to_complete);
74
75 static void virtio_set_hwaddr(struct virtio_hw *hw);
76 static void virtio_get_hwaddr(struct virtio_hw *hw);
77
78 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
79                                  struct rte_eth_stats *stats);
80 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
81                                  struct rte_eth_xstat *xstats, unsigned n);
82 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
83                                        struct rte_eth_xstat_name *xstats_names,
84                                        unsigned limit);
85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
88                                 uint16_t vlan_id, int on);
89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
90                                 struct ether_addr *mac_addr,
91                                 uint32_t index, uint32_t vmdq __rte_unused);
92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
94                                 struct ether_addr *mac_addr);
95
96 static int virtio_dev_queue_stats_mapping_set(
97         __rte_unused struct rte_eth_dev *eth_dev,
98         __rte_unused uint16_t queue_id,
99         __rte_unused uint8_t stat_idx,
100         __rte_unused uint8_t is_rx);
101
102 /*
103  * The set of PCI devices this driver supports
104  */
105 static const struct rte_pci_id pci_id_virtio_map[] = {
106         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
108         { .vendor_id = 0, /* sentinel */ },
109 };
110
111 struct rte_virtio_xstats_name_off {
112         char name[RTE_ETH_XSTATS_NAME_SIZE];
113         unsigned offset;
114 };
115
116 /* [rt]x_qX_ is prepended to the name string here */
117 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
118         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
119         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
120         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
121         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
122         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
123         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
124         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
125         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
126         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
127         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
128         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
129         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
130         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
131 };
132
133 /* [rt]x_qX_ is prepended to the name string here */
134 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
135         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
136         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
137         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
138         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
139         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
140         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
141         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
142         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
143         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
144         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
145         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
146         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
147         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
148 };
149
150 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
151                             sizeof(rte_virtio_rxq_stat_strings[0]))
152 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
153                             sizeof(rte_virtio_txq_stat_strings[0]))
154
155 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
156
157 static int
158 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
159                 int *dlen, int pkt_num)
160 {
161         uint32_t head, i;
162         int k, sum = 0;
163         virtio_net_ctrl_ack status = ~0;
164         struct virtio_pmd_ctrl result;
165         struct virtqueue *vq;
166
167         ctrl->status = status;
168
169         if (!cvq || !cvq->vq) {
170                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
171                 return -1;
172         }
173         vq = cvq->vq;
174         head = vq->vq_desc_head_idx;
175
176         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
177                 "vq->hw->cvq = %p vq = %p",
178                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
179
180         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
181                 return -1;
182
183         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
184                 sizeof(struct virtio_pmd_ctrl));
185
186         /*
187          * Format is enforced in qemu code:
188          * One TX packet for header;
189          * At least one TX packet per argument;
190          * One RX packet for ACK.
191          */
192         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
193         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
194         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
195         vq->vq_free_cnt--;
196         i = vq->vq_ring.desc[head].next;
197
198         for (k = 0; k < pkt_num; k++) {
199                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
200                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
201                         + sizeof(struct virtio_net_ctrl_hdr)
202                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
203                 vq->vq_ring.desc[i].len = dlen[k];
204                 sum += dlen[k];
205                 vq->vq_free_cnt--;
206                 i = vq->vq_ring.desc[i].next;
207         }
208
209         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
210         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
211                         + sizeof(struct virtio_net_ctrl_hdr);
212         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
213         vq->vq_free_cnt--;
214
215         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
216
217         vq_update_avail_ring(vq, head);
218         vq_update_avail_idx(vq);
219
220         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
221
222         virtqueue_notify(vq);
223
224         rte_rmb();
225         while (VIRTQUEUE_NUSED(vq) == 0) {
226                 rte_rmb();
227                 usleep(100);
228         }
229
230         while (VIRTQUEUE_NUSED(vq)) {
231                 uint32_t idx, desc_idx, used_idx;
232                 struct vring_used_elem *uep;
233
234                 used_idx = (uint32_t)(vq->vq_used_cons_idx
235                                 & (vq->vq_nentries - 1));
236                 uep = &vq->vq_ring.used->ring[used_idx];
237                 idx = (uint32_t) uep->id;
238                 desc_idx = idx;
239
240                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
241                         desc_idx = vq->vq_ring.desc[desc_idx].next;
242                         vq->vq_free_cnt++;
243                 }
244
245                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
246                 vq->vq_desc_head_idx = idx;
247
248                 vq->vq_used_cons_idx++;
249                 vq->vq_free_cnt++;
250         }
251
252         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
253                         vq->vq_free_cnt, vq->vq_desc_head_idx);
254
255         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
256                         sizeof(struct virtio_pmd_ctrl));
257
258         return result.status;
259 }
260
261 static int
262 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
263 {
264         struct virtio_hw *hw = dev->data->dev_private;
265         struct virtio_pmd_ctrl ctrl;
266         int dlen[1];
267         int ret;
268
269         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
270         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
271         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
272
273         dlen[0] = sizeof(uint16_t);
274
275         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
276         if (ret) {
277                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
278                           "failed, this is too late now...");
279                 return -EINVAL;
280         }
281
282         return 0;
283 }
284
285 static void
286 virtio_dev_queue_release(void *queue __rte_unused)
287 {
288         /* do nothing */
289 }
290
291 static int
292 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
293 {
294         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
295                 return VTNET_CQ;
296         else if (vtpci_queue_idx % 2 == 0)
297                 return VTNET_RQ;
298         else
299                 return VTNET_TQ;
300 }
301
302 static uint16_t
303 virtio_get_nr_vq(struct virtio_hw *hw)
304 {
305         uint16_t nr_vq = hw->max_queue_pairs * 2;
306
307         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
308                 nr_vq += 1;
309
310         return nr_vq;
311 }
312
313 static void
314 virtio_init_vring(struct virtqueue *vq)
315 {
316         int size = vq->vq_nentries;
317         struct vring *vr = &vq->vq_ring;
318         uint8_t *ring_mem = vq->vq_ring_virt_mem;
319
320         PMD_INIT_FUNC_TRACE();
321
322         /*
323          * Reinitialise since virtio port might have been stopped and restarted
324          */
325         memset(ring_mem, 0, vq->vq_ring_size);
326         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
327         vq->vq_used_cons_idx = 0;
328         vq->vq_desc_head_idx = 0;
329         vq->vq_avail_idx = 0;
330         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
331         vq->vq_free_cnt = vq->vq_nentries;
332         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
333
334         vring_desc_init(vr->desc, size);
335
336         /*
337          * Disable device(host) interrupting guest
338          */
339         virtqueue_disable_intr(vq);
340 }
341
342 static int
343 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
344 {
345         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
346         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
347         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
348         unsigned int vq_size, size;
349         struct virtio_hw *hw = dev->data->dev_private;
350         struct virtnet_rx *rxvq = NULL;
351         struct virtnet_tx *txvq = NULL;
352         struct virtnet_ctl *cvq = NULL;
353         struct virtqueue *vq;
354         size_t sz_hdr_mz = 0;
355         void *sw_ring = NULL;
356         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
357         int ret;
358
359         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
360
361         /*
362          * Read the virtqueue size from the Queue Size field
363          * Always power of 2 and if 0 virtqueue does not exist
364          */
365         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
366         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
367         if (vq_size == 0) {
368                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
369                 return -EINVAL;
370         }
371
372         if (!rte_is_power_of_2(vq_size)) {
373                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
374                 return -EINVAL;
375         }
376
377         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
378                  dev->data->port_id, vtpci_queue_idx);
379
380         size = RTE_ALIGN_CEIL(sizeof(*vq) +
381                                 vq_size * sizeof(struct vq_desc_extra),
382                                 RTE_CACHE_LINE_SIZE);
383         if (queue_type == VTNET_TQ) {
384                 /*
385                  * For each xmit packet, allocate a virtio_net_hdr
386                  * and indirect ring elements
387                  */
388                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
389         } else if (queue_type == VTNET_CQ) {
390                 /* Allocate a page for control vq command, data and status */
391                 sz_hdr_mz = PAGE_SIZE;
392         }
393
394         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
395                                 SOCKET_ID_ANY);
396         if (vq == NULL) {
397                 PMD_INIT_LOG(ERR, "can not allocate vq");
398                 return -ENOMEM;
399         }
400         hw->vqs[vtpci_queue_idx] = vq;
401
402         vq->hw = hw;
403         vq->vq_queue_index = vtpci_queue_idx;
404         vq->vq_nentries = vq_size;
405
406         /*
407          * Reserve a memzone for vring elements
408          */
409         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
410         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
411         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
412                      size, vq->vq_ring_size);
413
414         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
415                                          SOCKET_ID_ANY,
416                                          0, VIRTIO_PCI_VRING_ALIGN);
417         if (mz == NULL) {
418                 if (rte_errno == EEXIST)
419                         mz = rte_memzone_lookup(vq_name);
420                 if (mz == NULL) {
421                         ret = -ENOMEM;
422                         goto fail_q_alloc;
423                 }
424         }
425
426         memset(mz->addr, 0, sizeof(mz->len));
427
428         vq->vq_ring_mem = mz->phys_addr;
429         vq->vq_ring_virt_mem = mz->addr;
430         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
431                      (uint64_t)mz->phys_addr);
432         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
433                      (uint64_t)(uintptr_t)mz->addr);
434
435         virtio_init_vring(vq);
436
437         if (sz_hdr_mz) {
438                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
439                          dev->data->port_id, vtpci_queue_idx);
440                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
441                                                      SOCKET_ID_ANY, 0,
442                                                      RTE_CACHE_LINE_SIZE);
443                 if (hdr_mz == NULL) {
444                         if (rte_errno == EEXIST)
445                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
446                         if (hdr_mz == NULL) {
447                                 ret = -ENOMEM;
448                                 goto fail_q_alloc;
449                         }
450                 }
451         }
452
453         if (queue_type == VTNET_RQ) {
454                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
455                                sizeof(vq->sw_ring[0]);
456
457                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
458                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
459                 if (!sw_ring) {
460                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
461                         ret = -ENOMEM;
462                         goto fail_q_alloc;
463                 }
464
465                 vq->sw_ring = sw_ring;
466                 rxvq = &vq->rxq;
467                 rxvq->vq = vq;
468                 rxvq->port_id = dev->data->port_id;
469                 rxvq->mz = mz;
470         } else if (queue_type == VTNET_TQ) {
471                 txvq = &vq->txq;
472                 txvq->vq = vq;
473                 txvq->port_id = dev->data->port_id;
474                 txvq->mz = mz;
475                 txvq->virtio_net_hdr_mz = hdr_mz;
476                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
477         } else if (queue_type == VTNET_CQ) {
478                 cvq = &vq->cq;
479                 cvq->vq = vq;
480                 cvq->mz = mz;
481                 cvq->virtio_net_hdr_mz = hdr_mz;
482                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
483                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
484
485                 hw->cvq = cvq;
486         }
487
488         /* For virtio_user case (that is when hw->dev is NULL), we use
489          * virtual address. And we need properly set _offset_, please see
490          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
491          */
492         if (!hw->virtio_user_dev)
493                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
494         else {
495                 vq->vq_ring_mem = (uintptr_t)mz->addr;
496                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
497                 if (queue_type == VTNET_TQ)
498                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
499                 else if (queue_type == VTNET_CQ)
500                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
501         }
502
503         if (queue_type == VTNET_TQ) {
504                 struct virtio_tx_region *txr;
505                 unsigned int i;
506
507                 txr = hdr_mz->addr;
508                 memset(txr, 0, vq_size * sizeof(*txr));
509                 for (i = 0; i < vq_size; i++) {
510                         struct vring_desc *start_dp = txr[i].tx_indir;
511
512                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
513
514                         /* first indirect descriptor is always the tx header */
515                         start_dp->addr = txvq->virtio_net_hdr_mem
516                                 + i * sizeof(*txr)
517                                 + offsetof(struct virtio_tx_region, tx_hdr);
518
519                         start_dp->len = hw->vtnet_hdr_size;
520                         start_dp->flags = VRING_DESC_F_NEXT;
521                 }
522         }
523
524         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
525                 PMD_INIT_LOG(ERR, "setup_queue failed");
526                 return -EINVAL;
527         }
528
529         return 0;
530
531 fail_q_alloc:
532         rte_free(sw_ring);
533         rte_memzone_free(hdr_mz);
534         rte_memzone_free(mz);
535         rte_free(vq);
536
537         return ret;
538 }
539
540 static void
541 virtio_free_queues(struct virtio_hw *hw)
542 {
543         uint16_t nr_vq = virtio_get_nr_vq(hw);
544         struct virtqueue *vq;
545         int queue_type;
546         uint16_t i;
547
548         for (i = 0; i < nr_vq; i++) {
549                 vq = hw->vqs[i];
550                 if (!vq)
551                         continue;
552
553                 queue_type = virtio_get_queue_type(hw, i);
554                 if (queue_type == VTNET_RQ) {
555                         rte_free(vq->sw_ring);
556                         rte_memzone_free(vq->rxq.mz);
557                 } else if (queue_type == VTNET_TQ) {
558                         rte_memzone_free(vq->txq.mz);
559                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
560                 } else {
561                         rte_memzone_free(vq->cq.mz);
562                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
563                 }
564
565                 rte_free(vq);
566         }
567
568         rte_free(hw->vqs);
569 }
570
571 static int
572 virtio_alloc_queues(struct rte_eth_dev *dev)
573 {
574         struct virtio_hw *hw = dev->data->dev_private;
575         uint16_t nr_vq = virtio_get_nr_vq(hw);
576         uint16_t i;
577         int ret;
578
579         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
580         if (!hw->vqs) {
581                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
582                 return -ENOMEM;
583         }
584
585         for (i = 0; i < nr_vq; i++) {
586                 ret = virtio_init_queue(dev, i);
587                 if (ret < 0) {
588                         virtio_free_queues(hw);
589                         return ret;
590                 }
591         }
592
593         return 0;
594 }
595
596 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
597
598 static void
599 virtio_dev_close(struct rte_eth_dev *dev)
600 {
601         struct virtio_hw *hw = dev->data->dev_private;
602         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
603
604         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
605
606         /* reset the NIC */
607         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
608                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
609         if (intr_conf->rxq)
610                 virtio_queues_unbind_intr(dev);
611
612         if (intr_conf->lsc || intr_conf->rxq) {
613                 rte_intr_disable(dev->intr_handle);
614                 rte_intr_efd_disable(dev->intr_handle);
615                 rte_free(dev->intr_handle->intr_vec);
616                 dev->intr_handle->intr_vec = NULL;
617         }
618
619         vtpci_reset(hw);
620         virtio_dev_free_mbufs(dev);
621         virtio_free_queues(hw);
622 }
623
624 static void
625 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
626 {
627         struct virtio_hw *hw = dev->data->dev_private;
628         struct virtio_pmd_ctrl ctrl;
629         int dlen[1];
630         int ret;
631
632         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
633                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
634                 return;
635         }
636
637         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
638         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
639         ctrl.data[0] = 1;
640         dlen[0] = 1;
641
642         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
643         if (ret)
644                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
645 }
646
647 static void
648 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
649 {
650         struct virtio_hw *hw = dev->data->dev_private;
651         struct virtio_pmd_ctrl ctrl;
652         int dlen[1];
653         int ret;
654
655         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
656                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
657                 return;
658         }
659
660         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
661         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
662         ctrl.data[0] = 0;
663         dlen[0] = 1;
664
665         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
666         if (ret)
667                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
668 }
669
670 static void
671 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
672 {
673         struct virtio_hw *hw = dev->data->dev_private;
674         struct virtio_pmd_ctrl ctrl;
675         int dlen[1];
676         int ret;
677
678         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
679                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
680                 return;
681         }
682
683         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
684         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
685         ctrl.data[0] = 1;
686         dlen[0] = 1;
687
688         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
689         if (ret)
690                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
691 }
692
693 static void
694 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
695 {
696         struct virtio_hw *hw = dev->data->dev_private;
697         struct virtio_pmd_ctrl ctrl;
698         int dlen[1];
699         int ret;
700
701         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
702                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
703                 return;
704         }
705
706         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
707         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
708         ctrl.data[0] = 0;
709         dlen[0] = 1;
710
711         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
712         if (ret)
713                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
714 }
715
716 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
717 static int
718 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
719 {
720         struct virtio_hw *hw = dev->data->dev_private;
721         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
722                                  hw->vtnet_hdr_size;
723         uint32_t frame_size = mtu + ether_hdr_len;
724
725         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
726                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
727                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
728                 return -EINVAL;
729         }
730         return 0;
731 }
732
733 static int
734 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
735 {
736         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
737         struct virtqueue *vq = rxvq->vq;
738
739         virtqueue_enable_intr(vq);
740         return 0;
741 }
742
743 static int
744 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
745 {
746         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
747         struct virtqueue *vq = rxvq->vq;
748
749         virtqueue_disable_intr(vq);
750         return 0;
751 }
752
753 /*
754  * dev_ops for virtio, bare necessities for basic operation
755  */
756 static const struct eth_dev_ops virtio_eth_dev_ops = {
757         .dev_configure           = virtio_dev_configure,
758         .dev_start               = virtio_dev_start,
759         .dev_stop                = virtio_dev_stop,
760         .dev_close               = virtio_dev_close,
761         .promiscuous_enable      = virtio_dev_promiscuous_enable,
762         .promiscuous_disable     = virtio_dev_promiscuous_disable,
763         .allmulticast_enable     = virtio_dev_allmulticast_enable,
764         .allmulticast_disable    = virtio_dev_allmulticast_disable,
765         .mtu_set                 = virtio_mtu_set,
766         .dev_infos_get           = virtio_dev_info_get,
767         .stats_get               = virtio_dev_stats_get,
768         .xstats_get              = virtio_dev_xstats_get,
769         .xstats_get_names        = virtio_dev_xstats_get_names,
770         .stats_reset             = virtio_dev_stats_reset,
771         .xstats_reset            = virtio_dev_stats_reset,
772         .link_update             = virtio_dev_link_update,
773         .rx_queue_setup          = virtio_dev_rx_queue_setup,
774         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
775         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
776         .rx_queue_release        = virtio_dev_queue_release,
777         .rx_descriptor_done      = virtio_dev_rx_queue_done,
778         .tx_queue_setup          = virtio_dev_tx_queue_setup,
779         .tx_queue_release        = virtio_dev_queue_release,
780         /* collect stats per queue */
781         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
782         .vlan_filter_set         = virtio_vlan_filter_set,
783         .mac_addr_add            = virtio_mac_addr_add,
784         .mac_addr_remove         = virtio_mac_addr_remove,
785         .mac_addr_set            = virtio_mac_addr_set,
786 };
787
788 static inline int
789 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
790                                 struct rte_eth_link *link)
791 {
792         struct rte_eth_link *dst = link;
793         struct rte_eth_link *src = &(dev->data->dev_link);
794
795         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
796                         *(uint64_t *)src) == 0)
797                 return -1;
798
799         return 0;
800 }
801
802 /**
803  * Atomically writes the link status information into global
804  * structure rte_eth_dev.
805  *
806  * @param dev
807  *   - Pointer to the structure rte_eth_dev to read from.
808  *   - Pointer to the buffer to be saved with the link status.
809  *
810  * @return
811  *   - On success, zero.
812  *   - On failure, negative value.
813  */
814 static inline int
815 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
816                 struct rte_eth_link *link)
817 {
818         struct rte_eth_link *dst = &(dev->data->dev_link);
819         struct rte_eth_link *src = link;
820
821         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
822                                         *(uint64_t *)src) == 0)
823                 return -1;
824
825         return 0;
826 }
827
828 static void
829 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
830 {
831         unsigned i;
832
833         for (i = 0; i < dev->data->nb_tx_queues; i++) {
834                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
835                 if (txvq == NULL)
836                         continue;
837
838                 stats->opackets += txvq->stats.packets;
839                 stats->obytes += txvq->stats.bytes;
840                 stats->oerrors += txvq->stats.errors;
841
842                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
843                         stats->q_opackets[i] = txvq->stats.packets;
844                         stats->q_obytes[i] = txvq->stats.bytes;
845                 }
846         }
847
848         for (i = 0; i < dev->data->nb_rx_queues; i++) {
849                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
850                 if (rxvq == NULL)
851                         continue;
852
853                 stats->ipackets += rxvq->stats.packets;
854                 stats->ibytes += rxvq->stats.bytes;
855                 stats->ierrors += rxvq->stats.errors;
856
857                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
858                         stats->q_ipackets[i] = rxvq->stats.packets;
859                         stats->q_ibytes[i] = rxvq->stats.bytes;
860                 }
861         }
862
863         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
864 }
865
866 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
867                                        struct rte_eth_xstat_name *xstats_names,
868                                        __rte_unused unsigned limit)
869 {
870         unsigned i;
871         unsigned count = 0;
872         unsigned t;
873
874         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
875                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
876
877         if (xstats_names != NULL) {
878                 /* Note: limit checked in rte_eth_xstats_names() */
879
880                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
881                         struct virtqueue *rxvq = dev->data->rx_queues[i];
882                         if (rxvq == NULL)
883                                 continue;
884                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
885                                 snprintf(xstats_names[count].name,
886                                         sizeof(xstats_names[count].name),
887                                         "rx_q%u_%s", i,
888                                         rte_virtio_rxq_stat_strings[t].name);
889                                 count++;
890                         }
891                 }
892
893                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
894                         struct virtqueue *txvq = dev->data->tx_queues[i];
895                         if (txvq == NULL)
896                                 continue;
897                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
898                                 snprintf(xstats_names[count].name,
899                                         sizeof(xstats_names[count].name),
900                                         "tx_q%u_%s", i,
901                                         rte_virtio_txq_stat_strings[t].name);
902                                 count++;
903                         }
904                 }
905                 return count;
906         }
907         return nstats;
908 }
909
910 static int
911 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
912                       unsigned n)
913 {
914         unsigned i;
915         unsigned count = 0;
916
917         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
918                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
919
920         if (n < nstats)
921                 return nstats;
922
923         for (i = 0; i < dev->data->nb_rx_queues; i++) {
924                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
925
926                 if (rxvq == NULL)
927                         continue;
928
929                 unsigned t;
930
931                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
932                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
933                                 rte_virtio_rxq_stat_strings[t].offset);
934                         xstats[count].id = count;
935                         count++;
936                 }
937         }
938
939         for (i = 0; i < dev->data->nb_tx_queues; i++) {
940                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
941
942                 if (txvq == NULL)
943                         continue;
944
945                 unsigned t;
946
947                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
948                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
949                                 rte_virtio_txq_stat_strings[t].offset);
950                         xstats[count].id = count;
951                         count++;
952                 }
953         }
954
955         return count;
956 }
957
958 static void
959 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
960 {
961         virtio_update_stats(dev, stats);
962 }
963
964 static void
965 virtio_dev_stats_reset(struct rte_eth_dev *dev)
966 {
967         unsigned int i;
968
969         for (i = 0; i < dev->data->nb_tx_queues; i++) {
970                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
971                 if (txvq == NULL)
972                         continue;
973
974                 txvq->stats.packets = 0;
975                 txvq->stats.bytes = 0;
976                 txvq->stats.errors = 0;
977                 txvq->stats.multicast = 0;
978                 txvq->stats.broadcast = 0;
979                 memset(txvq->stats.size_bins, 0,
980                        sizeof(txvq->stats.size_bins[0]) * 8);
981         }
982
983         for (i = 0; i < dev->data->nb_rx_queues; i++) {
984                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
985                 if (rxvq == NULL)
986                         continue;
987
988                 rxvq->stats.packets = 0;
989                 rxvq->stats.bytes = 0;
990                 rxvq->stats.errors = 0;
991                 rxvq->stats.multicast = 0;
992                 rxvq->stats.broadcast = 0;
993                 memset(rxvq->stats.size_bins, 0,
994                        sizeof(rxvq->stats.size_bins[0]) * 8);
995         }
996 }
997
998 static void
999 virtio_set_hwaddr(struct virtio_hw *hw)
1000 {
1001         vtpci_write_dev_config(hw,
1002                         offsetof(struct virtio_net_config, mac),
1003                         &hw->mac_addr, ETHER_ADDR_LEN);
1004 }
1005
1006 static void
1007 virtio_get_hwaddr(struct virtio_hw *hw)
1008 {
1009         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1010                 vtpci_read_dev_config(hw,
1011                         offsetof(struct virtio_net_config, mac),
1012                         &hw->mac_addr, ETHER_ADDR_LEN);
1013         } else {
1014                 eth_random_addr(&hw->mac_addr[0]);
1015                 virtio_set_hwaddr(hw);
1016         }
1017 }
1018
1019 static void
1020 virtio_mac_table_set(struct virtio_hw *hw,
1021                      const struct virtio_net_ctrl_mac *uc,
1022                      const struct virtio_net_ctrl_mac *mc)
1023 {
1024         struct virtio_pmd_ctrl ctrl;
1025         int err, len[2];
1026
1027         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1028                 PMD_DRV_LOG(INFO, "host does not support mac table");
1029                 return;
1030         }
1031
1032         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1033         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1034
1035         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1036         memcpy(ctrl.data, uc, len[0]);
1037
1038         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1039         memcpy(ctrl.data + len[0], mc, len[1]);
1040
1041         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1042         if (err != 0)
1043                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1044 }
1045
1046 static void
1047 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1048                     uint32_t index, uint32_t vmdq __rte_unused)
1049 {
1050         struct virtio_hw *hw = dev->data->dev_private;
1051         const struct ether_addr *addrs = dev->data->mac_addrs;
1052         unsigned int i;
1053         struct virtio_net_ctrl_mac *uc, *mc;
1054
1055         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1056                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1057                 return;
1058         }
1059
1060         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1061         uc->entries = 0;
1062         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1063         mc->entries = 0;
1064
1065         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1066                 const struct ether_addr *addr
1067                         = (i == index) ? mac_addr : addrs + i;
1068                 struct virtio_net_ctrl_mac *tbl
1069                         = is_multicast_ether_addr(addr) ? mc : uc;
1070
1071                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1072         }
1073
1074         virtio_mac_table_set(hw, uc, mc);
1075 }
1076
1077 static void
1078 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1079 {
1080         struct virtio_hw *hw = dev->data->dev_private;
1081         struct ether_addr *addrs = dev->data->mac_addrs;
1082         struct virtio_net_ctrl_mac *uc, *mc;
1083         unsigned int i;
1084
1085         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1086                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1087                 return;
1088         }
1089
1090         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1091         uc->entries = 0;
1092         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1093         mc->entries = 0;
1094
1095         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1096                 struct virtio_net_ctrl_mac *tbl;
1097
1098                 if (i == index || is_zero_ether_addr(addrs + i))
1099                         continue;
1100
1101                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1102                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1103         }
1104
1105         virtio_mac_table_set(hw, uc, mc);
1106 }
1107
1108 static void
1109 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1110 {
1111         struct virtio_hw *hw = dev->data->dev_private;
1112
1113         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1114
1115         /* Use atomic update if available */
1116         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1117                 struct virtio_pmd_ctrl ctrl;
1118                 int len = ETHER_ADDR_LEN;
1119
1120                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1121                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1122
1123                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1124                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1125         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1126                 virtio_set_hwaddr(hw);
1127 }
1128
1129 static int
1130 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1131 {
1132         struct virtio_hw *hw = dev->data->dev_private;
1133         struct virtio_pmd_ctrl ctrl;
1134         int len;
1135
1136         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1137                 return -ENOTSUP;
1138
1139         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1140         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1141         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1142         len = sizeof(vlan_id);
1143
1144         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1145 }
1146
1147 static int
1148 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1149 {
1150         uint64_t host_features;
1151
1152         /* Prepare guest_features: feature that driver wants to support */
1153         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1154                 req_features);
1155
1156         /* Read device(host) feature bits */
1157         host_features = VTPCI_OPS(hw)->get_features(hw);
1158         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1159                 host_features);
1160
1161         /*
1162          * Negotiate features: Subset of device feature bits are written back
1163          * guest feature bits.
1164          */
1165         hw->guest_features = req_features;
1166         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1167         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1168                 hw->guest_features);
1169
1170         if (hw->modern) {
1171                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1172                         PMD_INIT_LOG(ERR,
1173                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1174                         return -1;
1175                 }
1176                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1177                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1178                         PMD_INIT_LOG(ERR,
1179                                 "failed to set FEATURES_OK status!");
1180                         return -1;
1181                 }
1182         }
1183
1184         hw->req_guest_features = req_features;
1185
1186         return 0;
1187 }
1188
1189 /*
1190  * Process Virtio Config changed interrupt and call the callback
1191  * if link state changed.
1192  */
1193 static void
1194 virtio_interrupt_handler(struct rte_intr_handle *handle,
1195                          void *param)
1196 {
1197         struct rte_eth_dev *dev = param;
1198         struct virtio_hw *hw = dev->data->dev_private;
1199         uint8_t isr;
1200
1201         /* Read interrupt status which clears interrupt */
1202         isr = vtpci_isr(hw);
1203         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1204
1205         if (rte_intr_enable(handle) < 0)
1206                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1207
1208         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1209                 if (virtio_dev_link_update(dev, 0) == 0)
1210                         _rte_eth_dev_callback_process(dev,
1211                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1212         }
1213
1214 }
1215
1216 static void
1217 rx_func_get(struct rte_eth_dev *eth_dev)
1218 {
1219         struct virtio_hw *hw = eth_dev->data->dev_private;
1220         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1221                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1222         else
1223                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1224 }
1225
1226 /* Only support 1:1 queue/interrupt mapping so far.
1227  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1228  * interrupt vectors (<N+1).
1229  */
1230 static int
1231 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1232 {
1233         uint32_t i;
1234         struct virtio_hw *hw = dev->data->dev_private;
1235
1236         PMD_INIT_LOG(INFO, "queue/interrupt binding\n");
1237         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1238                 dev->intr_handle->intr_vec[i] = i + 1;
1239                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1240                                                  VIRTIO_MSI_NO_VECTOR) {
1241                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1242                         return -EBUSY;
1243                 }
1244         }
1245
1246         return 0;
1247 }
1248
1249 static void
1250 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1251 {
1252         uint32_t i;
1253         struct virtio_hw *hw = dev->data->dev_private;
1254
1255         PMD_INIT_LOG(INFO, "queue/interrupt unbinding\n");
1256         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1257                 VTPCI_OPS(hw)->set_queue_irq(hw,
1258                                              hw->vqs[i * VTNET_CQ],
1259                                              VIRTIO_MSI_NO_VECTOR);
1260 }
1261
1262 static int
1263 virtio_configure_intr(struct rte_eth_dev *dev)
1264 {
1265         struct virtio_hw *hw = dev->data->dev_private;
1266
1267         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1268                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1269                 return -ENOTSUP;
1270         }
1271
1272         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1273                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1274                 return -1;
1275         }
1276
1277         if (!dev->intr_handle->intr_vec) {
1278                 dev->intr_handle->intr_vec =
1279                         rte_zmalloc("intr_vec",
1280                                     hw->max_queue_pairs * sizeof(int), 0);
1281                 if (!dev->intr_handle->intr_vec) {
1282                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1283                                      hw->max_queue_pairs);
1284                         return -ENOMEM;
1285                 }
1286         }
1287
1288         /* Re-register callback to update max_intr */
1289         rte_intr_callback_unregister(dev->intr_handle,
1290                                      virtio_interrupt_handler,
1291                                      dev);
1292         rte_intr_callback_register(dev->intr_handle,
1293                                    virtio_interrupt_handler,
1294                                    dev);
1295
1296         /* DO NOT try to remove this! This function will enable msix, or QEMU
1297          * will encounter SIGSEGV when DRIVER_OK is sent.
1298          * And for legacy devices, this should be done before queue/vec binding
1299          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1300          * (22) will be ignored.
1301          */
1302         if (rte_intr_enable(dev->intr_handle) < 0) {
1303                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1304                 return -1;
1305         }
1306
1307         if (virtio_queues_bind_intr(dev) < 0) {
1308                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1309                 return -1;
1310         }
1311
1312         return 0;
1313 }
1314
1315 /* reset device and renegotiate features if needed */
1316 static int
1317 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1318 {
1319         struct virtio_hw *hw = eth_dev->data->dev_private;
1320         struct virtio_net_config *config;
1321         struct virtio_net_config local_config;
1322         struct rte_pci_device *pci_dev = NULL;
1323         int ret;
1324
1325         /* Reset the device although not necessary at startup */
1326         vtpci_reset(hw);
1327
1328         /* Tell the host we've noticed this device. */
1329         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1330
1331         /* Tell the host we've known how to drive the device. */
1332         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1333         if (virtio_negotiate_features(hw, req_features) < 0)
1334                 return -1;
1335
1336         if (eth_dev->device) {
1337                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1338                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1339         }
1340
1341         /* If host does not support status then disable LSC */
1342         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1343                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1344         else
1345                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1346
1347         rx_func_get(eth_dev);
1348
1349         /* Setting up rx_header size for the device */
1350         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1351             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1352                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1353         else
1354                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1355
1356         /* Copy the permanent MAC address to: virtio_hw */
1357         virtio_get_hwaddr(hw);
1358         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1359                         &eth_dev->data->mac_addrs[0]);
1360         PMD_INIT_LOG(DEBUG,
1361                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1362                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1363                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1364
1365         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1366                 config = &local_config;
1367
1368                 vtpci_read_dev_config(hw,
1369                         offsetof(struct virtio_net_config, mac),
1370                         &config->mac, sizeof(config->mac));
1371
1372                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1373                         vtpci_read_dev_config(hw,
1374                                 offsetof(struct virtio_net_config, status),
1375                                 &config->status, sizeof(config->status));
1376                 } else {
1377                         PMD_INIT_LOG(DEBUG,
1378                                      "VIRTIO_NET_F_STATUS is not supported");
1379                         config->status = 0;
1380                 }
1381
1382                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1383                         vtpci_read_dev_config(hw,
1384                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1385                                 &config->max_virtqueue_pairs,
1386                                 sizeof(config->max_virtqueue_pairs));
1387                 } else {
1388                         PMD_INIT_LOG(DEBUG,
1389                                      "VIRTIO_NET_F_MQ is not supported");
1390                         config->max_virtqueue_pairs = 1;
1391                 }
1392
1393                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1394
1395                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1396                                 config->max_virtqueue_pairs);
1397                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1398                 PMD_INIT_LOG(DEBUG,
1399                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1400                                 config->mac[0], config->mac[1],
1401                                 config->mac[2], config->mac[3],
1402                                 config->mac[4], config->mac[5]);
1403         } else {
1404                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1405                 hw->max_queue_pairs = 1;
1406         }
1407
1408         ret = virtio_alloc_queues(eth_dev);
1409         if (ret < 0)
1410                 return ret;
1411
1412         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1413                 if (virtio_configure_intr(eth_dev) < 0) {
1414                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1415                         return -1;
1416                 }
1417         }
1418
1419         vtpci_reinit_complete(hw);
1420
1421         if (pci_dev)
1422                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1423                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1424                         pci_dev->id.device_id);
1425
1426         return 0;
1427 }
1428
1429 /*
1430  * Remap the PCI device again (IO port map for legacy device and
1431  * memory map for modern device), so that the secondary process
1432  * could have the PCI initiated correctly.
1433  */
1434 static int
1435 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1436 {
1437         if (hw->modern) {
1438                 /*
1439                  * We don't have to re-parse the PCI config space, since
1440                  * rte_eal_pci_map_device() makes sure the mapped address
1441                  * in secondary process would equal to the one mapped in
1442                  * the primary process: error will be returned if that
1443                  * requirement is not met.
1444                  *
1445                  * That said, we could simply reuse all cap pointers
1446                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1447                  * primary process, which is stored in shared memory.
1448                  */
1449                 if (rte_eal_pci_map_device(pci_dev)) {
1450                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1451                         return -1;
1452                 }
1453         } else {
1454                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1455                         return -1;
1456         }
1457
1458         return 0;
1459 }
1460
1461 static void
1462 virtio_set_vtpci_ops(struct virtio_hw *hw)
1463 {
1464 #ifdef RTE_VIRTIO_USER
1465         if (hw->virtio_user_dev)
1466                 VTPCI_OPS(hw) = &virtio_user_ops;
1467         else
1468 #endif
1469         if (hw->modern)
1470                 VTPCI_OPS(hw) = &modern_ops;
1471         else
1472                 VTPCI_OPS(hw) = &legacy_ops;
1473 }
1474
1475 /*
1476  * This function is based on probe() function in virtio_pci.c
1477  * It returns 0 on success.
1478  */
1479 int
1480 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1481 {
1482         struct virtio_hw *hw = eth_dev->data->dev_private;
1483         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1484         int ret;
1485
1486         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1487
1488         eth_dev->dev_ops = &virtio_eth_dev_ops;
1489         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1490
1491         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1492                 if (!hw->virtio_user_dev) {
1493                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1494                                                hw);
1495                         if (ret)
1496                                 return ret;
1497                 }
1498
1499                 virtio_set_vtpci_ops(hw);
1500                 if (hw->use_simple_rxtx) {
1501                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1502                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1503                 } else {
1504                         rx_func_get(eth_dev);
1505                 }
1506                 return 0;
1507         }
1508
1509         /* Allocate memory for storing MAC addresses */
1510         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1511         if (eth_dev->data->mac_addrs == NULL) {
1512                 PMD_INIT_LOG(ERR,
1513                         "Failed to allocate %d bytes needed to store MAC addresses",
1514                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1515                 return -ENOMEM;
1516         }
1517
1518         hw->port_id = eth_dev->data->port_id;
1519         /* For virtio_user case the hw->virtio_user_dev is populated by
1520          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1521          */
1522         if (!hw->virtio_user_dev) {
1523                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw,
1524                                  &dev_flags);
1525                 if (ret)
1526                         return ret;
1527         }
1528
1529         eth_dev->data->dev_flags = dev_flags;
1530
1531         /* reset device and negotiate default features */
1532         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1533         if (ret < 0)
1534                 return ret;
1535
1536         /* Setup interrupt callback  */
1537         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1538                 rte_intr_callback_register(eth_dev->intr_handle,
1539                         virtio_interrupt_handler, eth_dev);
1540
1541         return 0;
1542 }
1543
1544 static int
1545 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1546 {
1547         PMD_INIT_FUNC_TRACE();
1548
1549         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1550                 return -EPERM;
1551
1552         virtio_dev_stop(eth_dev);
1553         virtio_dev_close(eth_dev);
1554
1555         eth_dev->dev_ops = NULL;
1556         eth_dev->tx_pkt_burst = NULL;
1557         eth_dev->rx_pkt_burst = NULL;
1558
1559         rte_free(eth_dev->data->mac_addrs);
1560         eth_dev->data->mac_addrs = NULL;
1561
1562         /* reset interrupt callback  */
1563         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1564                 rte_intr_callback_unregister(eth_dev->intr_handle,
1565                                                 virtio_interrupt_handler,
1566                                                 eth_dev);
1567         if (eth_dev->device)
1568                 rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1569
1570         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1571
1572         return 0;
1573 }
1574
1575 static struct eth_driver rte_virtio_pmd = {
1576         .pci_drv = {
1577                 .driver = {
1578                         .name = "net_virtio",
1579                 },
1580                 .id_table = pci_id_virtio_map,
1581                 .drv_flags = 0,
1582                 .probe = rte_eth_dev_pci_probe,
1583                 .remove = rte_eth_dev_pci_remove,
1584         },
1585         .eth_dev_init = eth_virtio_dev_init,
1586         .eth_dev_uninit = eth_virtio_dev_uninit,
1587         .dev_private_size = sizeof(struct virtio_hw),
1588 };
1589
1590 RTE_INIT(rte_virtio_pmd_init);
1591 static void
1592 rte_virtio_pmd_init(void)
1593 {
1594         if (rte_eal_iopl_init() != 0) {
1595                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1596                 return;
1597         }
1598
1599         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1600 }
1601
1602 /*
1603  * Configure virtio device
1604  * It returns 0 on success.
1605  */
1606 static int
1607 virtio_dev_configure(struct rte_eth_dev *dev)
1608 {
1609         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1610         struct virtio_hw *hw = dev->data->dev_private;
1611         uint64_t req_features;
1612         int ret;
1613
1614         PMD_INIT_LOG(DEBUG, "configure");
1615         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1616         if (rxmode->hw_ip_checksum)
1617                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1618         if (rxmode->enable_lro)
1619                 req_features |=
1620                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1621                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1622
1623         /* if request features changed, reinit the device */
1624         if (req_features != hw->req_guest_features) {
1625                 ret = virtio_init_device(dev, req_features);
1626                 if (ret < 0)
1627                         return ret;
1628         }
1629
1630         if (rxmode->hw_ip_checksum &&
1631                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1632                 PMD_DRV_LOG(NOTICE,
1633                         "rx ip checksum not available on this host");
1634                 return -ENOTSUP;
1635         }
1636
1637         if (rxmode->enable_lro &&
1638                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1639                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1640                 PMD_DRV_LOG(NOTICE,
1641                         "lro not available on this host");
1642                 return -ENOTSUP;
1643         }
1644
1645         /* start control queue */
1646         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1647                 virtio_dev_cq_start(dev);
1648
1649         hw->vlan_strip = rxmode->hw_vlan_strip;
1650
1651         if (rxmode->hw_vlan_filter
1652             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1653                 PMD_DRV_LOG(NOTICE,
1654                             "vlan filtering not available on this host");
1655                 return -ENOTSUP;
1656         }
1657
1658         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1659                 /* Enable vector (0) for Link State Intrerrupt */
1660                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1661                                 VIRTIO_MSI_NO_VECTOR) {
1662                         PMD_DRV_LOG(ERR, "failed to set config vector");
1663                         return -EBUSY;
1664                 }
1665
1666         return 0;
1667 }
1668
1669
1670 static int
1671 virtio_dev_start(struct rte_eth_dev *dev)
1672 {
1673         uint16_t nb_queues, i;
1674         struct virtnet_rx *rxvq;
1675         struct virtnet_tx *txvq __rte_unused;
1676         struct virtio_hw *hw = dev->data->dev_private;
1677
1678         /* check if lsc interrupt feature is enabled */
1679         if (dev->data->dev_conf.intr_conf.lsc) {
1680                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1681                         PMD_DRV_LOG(ERR, "link status not supported by host");
1682                         return -ENOTSUP;
1683                 }
1684         }
1685
1686         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1687          * in device configure, but it could be unmapped  when device is
1688          * stopped.
1689          */
1690         if (dev->data->dev_conf.intr_conf.lsc ||
1691             dev->data->dev_conf.intr_conf.rxq) {
1692                 rte_intr_disable(dev->intr_handle);
1693
1694                 if (rte_intr_enable(dev->intr_handle) < 0) {
1695                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1696                         return -EIO;
1697                 }
1698         }
1699
1700         /* Initialize Link state */
1701         virtio_dev_link_update(dev, 0);
1702
1703         /*Notify the backend
1704          *Otherwise the tap backend might already stop its queue due to fullness.
1705          *vhost backend will have no chance to be waked up
1706          */
1707         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1708         if (hw->max_queue_pairs > 1) {
1709                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1710                         return -EINVAL;
1711         }
1712
1713         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1714
1715         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1716                 rxvq = dev->data->rx_queues[i];
1717                 virtqueue_notify(rxvq->vq);
1718         }
1719
1720         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1721
1722         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1723                 rxvq = dev->data->rx_queues[i];
1724                 VIRTQUEUE_DUMP(rxvq->vq);
1725         }
1726
1727         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1728                 txvq = dev->data->tx_queues[i];
1729                 VIRTQUEUE_DUMP(txvq->vq);
1730         }
1731
1732         return 0;
1733 }
1734
1735 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1736 {
1737         struct rte_mbuf *buf;
1738         int i, mbuf_num = 0;
1739
1740         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1741                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1742
1743                 PMD_INIT_LOG(DEBUG,
1744                              "Before freeing rxq[%d] used and unused buf", i);
1745                 VIRTQUEUE_DUMP(rxvq->vq);
1746
1747                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1748                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1749                         rte_pktmbuf_free(buf);
1750                         mbuf_num++;
1751                 }
1752
1753                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1754                 PMD_INIT_LOG(DEBUG,
1755                              "After freeing rxq[%d] used and unused buf", i);
1756                 VIRTQUEUE_DUMP(rxvq->vq);
1757         }
1758
1759         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1760                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1761
1762                 PMD_INIT_LOG(DEBUG,
1763                              "Before freeing txq[%d] used and unused bufs",
1764                              i);
1765                 VIRTQUEUE_DUMP(txvq->vq);
1766
1767                 mbuf_num = 0;
1768                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1769                         rte_pktmbuf_free(buf);
1770                         mbuf_num++;
1771                 }
1772
1773                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1774                 PMD_INIT_LOG(DEBUG,
1775                              "After freeing txq[%d] used and unused buf", i);
1776                 VIRTQUEUE_DUMP(txvq->vq);
1777         }
1778 }
1779
1780 /*
1781  * Stop device: disable interrupt and mark link down
1782  */
1783 static void
1784 virtio_dev_stop(struct rte_eth_dev *dev)
1785 {
1786         struct rte_eth_link link;
1787         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1788
1789         PMD_INIT_LOG(DEBUG, "stop");
1790
1791         if (intr_conf->lsc || intr_conf->rxq)
1792                 rte_intr_disable(dev->intr_handle);
1793
1794         memset(&link, 0, sizeof(link));
1795         virtio_dev_atomic_write_link_status(dev, &link);
1796 }
1797
1798 static int
1799 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1800 {
1801         struct rte_eth_link link, old;
1802         uint16_t status;
1803         struct virtio_hw *hw = dev->data->dev_private;
1804         memset(&link, 0, sizeof(link));
1805         virtio_dev_atomic_read_link_status(dev, &link);
1806         old = link;
1807         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1808         link.link_speed  = SPEED_10G;
1809
1810         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1811                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1812                 vtpci_read_dev_config(hw,
1813                                 offsetof(struct virtio_net_config, status),
1814                                 &status, sizeof(status));
1815                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1816                         link.link_status = ETH_LINK_DOWN;
1817                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1818                                      dev->data->port_id);
1819                 } else {
1820                         link.link_status = ETH_LINK_UP;
1821                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1822                                      dev->data->port_id);
1823                 }
1824         } else {
1825                 link.link_status = ETH_LINK_UP;
1826         }
1827         virtio_dev_atomic_write_link_status(dev, &link);
1828
1829         return (old.link_status == link.link_status) ? -1 : 0;
1830 }
1831
1832 static void
1833 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1834 {
1835         uint64_t tso_mask, host_features;
1836         struct virtio_hw *hw = dev->data->dev_private;
1837
1838         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1839         dev_info->max_rx_queues =
1840                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1841         dev_info->max_tx_queues =
1842                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1843         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1844         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1845         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1846         dev_info->default_txconf = (struct rte_eth_txconf) {
1847                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1848         };
1849
1850         host_features = VTPCI_OPS(hw)->get_features(hw);
1851         dev_info->rx_offload_capa = 0;
1852         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1853                 dev_info->rx_offload_capa |=
1854                         DEV_RX_OFFLOAD_TCP_CKSUM |
1855                         DEV_RX_OFFLOAD_UDP_CKSUM;
1856         }
1857         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1858                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1859         if ((host_features & tso_mask) == tso_mask)
1860                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1861
1862         dev_info->tx_offload_capa = 0;
1863         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1864                 dev_info->tx_offload_capa |=
1865                         DEV_TX_OFFLOAD_UDP_CKSUM |
1866                         DEV_TX_OFFLOAD_TCP_CKSUM;
1867         }
1868         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1869                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1870         if ((hw->guest_features & tso_mask) == tso_mask)
1871                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1872 }
1873
1874 /*
1875  * It enables testpmd to collect per queue stats.
1876  */
1877 static int
1878 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1879 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1880 __rte_unused uint8_t is_rx)
1881 {
1882         return 0;
1883 }
1884
1885 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1886 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1887 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");