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35 #include <sys/types.h>
38 #include <sys/socket.h>
40 #include <rte_malloc.h>
41 #include <rte_kvargs.h>
42 #include <rte_ethdev_vdev.h>
44 #include <rte_alarm.h>
46 #include "virtio_ethdev.h"
47 #include "virtio_logs.h"
48 #include "virtio_pci.h"
49 #include "virtqueue.h"
50 #include "virtio_rxtx.h"
51 #include "virtio_user/virtio_user_dev.h"
53 #define virtio_user_get_dev(hw) \
54 ((struct virtio_user_dev *)(hw)->virtio_user_dev)
57 virtio_user_delayed_handler(void *param)
59 struct virtio_hw *hw = (struct virtio_hw *)param;
60 struct rte_eth_dev *dev = &rte_eth_devices[hw->port_id];
62 rte_intr_callback_unregister(dev->intr_handle,
63 virtio_interrupt_handler,
68 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
69 void *dst, int length)
72 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
74 if (offset == offsetof(struct virtio_net_config, mac) &&
75 length == ETHER_ADDR_LEN) {
76 for (i = 0; i < ETHER_ADDR_LEN; ++i)
77 ((uint8_t *)dst)[i] = dev->mac_addr[i];
81 if (offset == offsetof(struct virtio_net_config, status)) {
84 if (dev->vhostfd >= 0) {
88 flags = fcntl(dev->vhostfd, F_GETFL);
89 fcntl(dev->vhostfd, F_SETFL, flags | O_NONBLOCK);
90 r = recv(dev->vhostfd, buf, 128, MSG_PEEK);
91 if (r == 0 || (r < 0 && errno != EAGAIN)) {
92 dev->status &= (~VIRTIO_NET_S_LINK_UP);
93 PMD_DRV_LOG(ERR, "virtio-user port %u is down",
95 /* Only client mode is available now. Once the
96 * connection is broken, it can never be up
97 * again. Besides, this function could be called
98 * in the process of interrupt handling,
99 * callback cannot be unregistered here, set an
103 virtio_user_delayed_handler,
106 dev->status |= VIRTIO_NET_S_LINK_UP;
108 fcntl(dev->vhostfd, F_SETFL, flags & (~O_NONBLOCK));
110 *(uint16_t *)dst = dev->status;
113 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
114 *(uint16_t *)dst = dev->max_queue_pairs;
118 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset,
119 const void *src, int length)
122 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
124 if ((offset == offsetof(struct virtio_net_config, mac)) &&
125 (length == ETHER_ADDR_LEN))
126 for (i = 0; i < ETHER_ADDR_LEN; ++i)
127 dev->mac_addr[i] = ((const uint8_t *)src)[i];
129 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d",
134 virtio_user_reset(struct virtio_hw *hw)
136 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
138 if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
139 virtio_user_stop_device(dev);
143 virtio_user_set_status(struct virtio_hw *hw, uint8_t status)
145 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
147 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
148 virtio_user_start_device(dev);
149 else if (status == VIRTIO_CONFIG_STATUS_RESET)
150 virtio_user_reset(hw);
151 dev->status = status;
155 virtio_user_get_status(struct virtio_hw *hw)
157 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
163 virtio_user_get_features(struct virtio_hw *hw)
165 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
167 /* unmask feature bits defined in vhost user protocol */
168 return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES;
172 virtio_user_set_features(struct virtio_hw *hw, uint64_t features)
174 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
176 dev->features = features & dev->device_features;
180 virtio_user_get_isr(struct virtio_hw *hw __rte_unused)
182 /* rxq interrupts and config interrupt are separated in virtio-user,
183 * here we only report config change.
185 return VIRTIO_PCI_ISR_CONFIG;
189 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused,
190 uint16_t vec __rte_unused)
196 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused,
197 struct virtqueue *vq __rte_unused,
200 /* pretend we have done that */
204 /* This function is to get the queue size, aka, number of descs, of a specified
205 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the
206 * max supported queues.
209 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused)
211 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
213 /* Currently, each queue has same queue size */
214 return dev->queue_size;
218 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
220 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
221 uint16_t queue_idx = vq->vq_queue_index;
222 uint64_t desc_addr, avail_addr, used_addr;
224 desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
225 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
226 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
227 ring[vq->vq_nentries]),
228 VIRTIO_PCI_VRING_ALIGN);
230 dev->vrings[queue_idx].num = vq->vq_nentries;
231 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr;
232 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr;
233 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr;
239 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq)
241 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU
242 * correspondingly stops the ioeventfds, and reset the status of
244 * For modern devices, set queue desc, avail, used in PCI bar to 0,
245 * not see any more behavior in QEMU.
247 * Here we just care about what information to deliver to vhost-user
248 * or vhost-kernel. So we just close ioeventfd for now.
250 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
252 close(dev->callfds[vq->vq_queue_index]);
253 close(dev->kickfds[vq->vq_queue_index]);
257 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq)
260 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
262 if (hw->cvq && (hw->cvq->vq == vq)) {
263 virtio_user_handle_cq(dev, vq->vq_queue_index);
267 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0)
268 PMD_DRV_LOG(ERR, "failed to kick backend: %s",
272 const struct virtio_pci_ops virtio_user_ops = {
273 .read_dev_cfg = virtio_user_read_dev_config,
274 .write_dev_cfg = virtio_user_write_dev_config,
275 .reset = virtio_user_reset,
276 .get_status = virtio_user_get_status,
277 .set_status = virtio_user_set_status,
278 .get_features = virtio_user_get_features,
279 .set_features = virtio_user_set_features,
280 .get_isr = virtio_user_get_isr,
281 .set_config_irq = virtio_user_set_config_irq,
282 .set_queue_irq = virtio_user_set_queue_irq,
283 .get_queue_num = virtio_user_get_queue_num,
284 .setup_queue = virtio_user_setup_queue,
285 .del_queue = virtio_user_del_queue,
286 .notify_queue = virtio_user_notify_queue,
289 static const char *valid_args[] = {
290 #define VIRTIO_USER_ARG_QUEUES_NUM "queues"
291 VIRTIO_USER_ARG_QUEUES_NUM,
292 #define VIRTIO_USER_ARG_CQ_NUM "cq"
293 VIRTIO_USER_ARG_CQ_NUM,
294 #define VIRTIO_USER_ARG_MAC "mac"
296 #define VIRTIO_USER_ARG_PATH "path"
297 VIRTIO_USER_ARG_PATH,
298 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size"
299 VIRTIO_USER_ARG_QUEUE_SIZE,
300 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface"
301 VIRTIO_USER_ARG_INTERFACE_NAME,
305 #define VIRTIO_USER_DEF_CQ_EN 0
306 #define VIRTIO_USER_DEF_Q_NUM 1
307 #define VIRTIO_USER_DEF_Q_SZ 256
310 get_string_arg(const char *key __rte_unused,
311 const char *value, void *extra_args)
313 if (!value || !extra_args)
316 *(char **)extra_args = strdup(value);
318 if (!*(char **)extra_args)
325 get_integer_arg(const char *key __rte_unused,
326 const char *value, void *extra_args)
328 if (!value || !extra_args)
331 *(uint64_t *)extra_args = strtoull(value, NULL, 0);
336 static struct rte_vdev_driver virtio_user_driver;
338 static struct rte_eth_dev *
339 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev)
341 struct rte_eth_dev *eth_dev;
342 struct rte_eth_dev_data *data;
343 struct virtio_hw *hw;
344 struct virtio_user_dev *dev;
346 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw));
348 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev");
352 data = eth_dev->data;
353 hw = eth_dev->data->dev_private;
355 dev = rte_zmalloc(NULL, sizeof(*dev), 0);
357 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed");
358 rte_eth_dev_release_port(eth_dev);
363 hw->port_id = data->port_id;
364 dev->port_id = data->port_id;
365 virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops;
367 * MSIX is required to enable LSC (see virtio_init_device).
368 * Here just pretend that we support msix.
372 hw->use_simple_rxtx = 0;
373 hw->virtio_user_dev = dev;
374 data->dev_flags = RTE_ETH_DEV_DETACHABLE;
379 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev)
381 struct rte_eth_dev_data *data = eth_dev->data;
382 struct virtio_hw *hw = data->dev_private;
384 rte_free(hw->virtio_user_dev);
386 rte_eth_dev_release_port(eth_dev);
389 /* Dev initialization routine. Invoked once for each virtio vdev at
390 * EAL init time, see rte_bus_probe().
391 * Returns 0 on success.
394 virtio_user_pmd_probe(struct rte_vdev_device *dev)
396 struct rte_kvargs *kvlist = NULL;
397 struct rte_eth_dev *eth_dev;
398 struct virtio_hw *hw;
399 uint64_t queues = VIRTIO_USER_DEF_Q_NUM;
400 uint64_t cq = VIRTIO_USER_DEF_CQ_EN;
401 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ;
404 char *mac_addr = NULL;
407 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args);
409 PMD_INIT_LOG(ERR, "error when parsing param");
413 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) {
414 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH,
415 &get_string_arg, &path) < 0) {
416 PMD_INIT_LOG(ERR, "error to parse %s",
417 VIRTIO_USER_ARG_PATH);
421 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user",
422 VIRTIO_USER_ARG_QUEUE_SIZE);
426 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) {
427 if (is_vhost_user_by_type(path)) {
429 "arg %s applies only to vhost-kernel backend",
430 VIRTIO_USER_ARG_INTERFACE_NAME);
434 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME,
435 &get_string_arg, &ifname) < 0) {
436 PMD_INIT_LOG(ERR, "error to parse %s",
437 VIRTIO_USER_ARG_INTERFACE_NAME);
442 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) {
443 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC,
444 &get_string_arg, &mac_addr) < 0) {
445 PMD_INIT_LOG(ERR, "error to parse %s",
446 VIRTIO_USER_ARG_MAC);
451 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) {
452 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE,
453 &get_integer_arg, &queue_size) < 0) {
454 PMD_INIT_LOG(ERR, "error to parse %s",
455 VIRTIO_USER_ARG_QUEUE_SIZE);
460 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) {
461 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM,
462 &get_integer_arg, &queues) < 0) {
463 PMD_INIT_LOG(ERR, "error to parse %s",
464 VIRTIO_USER_ARG_QUEUES_NUM);
469 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) {
470 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM,
471 &get_integer_arg, &cq) < 0) {
472 PMD_INIT_LOG(ERR, "error to parse %s",
473 VIRTIO_USER_ARG_CQ_NUM);
476 } else if (queues > 1) {
480 if (queues > 1 && cq == 0) {
481 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q");
485 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) {
486 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u",
487 VIRTIO_USER_ARG_QUEUES_NUM, queues,
488 VIRTIO_MAX_VIRTQUEUE_PAIRS);
492 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
493 eth_dev = virtio_user_eth_dev_alloc(dev);
495 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device");
499 hw = eth_dev->data->dev_private;
500 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq,
501 queue_size, mac_addr, &ifname) < 0) {
502 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails");
503 virtio_user_eth_dev_free(eth_dev);
507 eth_dev = rte_eth_dev_attach_secondary(rte_vdev_device_name(dev));
512 /* previously called by rte_pci_probe() for physical dev */
513 if (eth_virtio_dev_init(eth_dev) < 0) {
514 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
515 virtio_user_eth_dev_free(eth_dev);
522 rte_kvargs_free(kvlist);
532 /** Called by rte_eth_dev_detach() */
534 virtio_user_pmd_remove(struct rte_vdev_device *vdev)
537 struct rte_eth_dev *eth_dev;
538 struct virtio_hw *hw;
539 struct virtio_user_dev *dev;
544 name = rte_vdev_device_name(vdev);
545 PMD_DRV_LOG(INFO, "Un-Initializing %s", name);
546 eth_dev = rte_eth_dev_allocated(name);
550 /* make sure the device is stopped, queues freed */
551 rte_eth_dev_close(eth_dev->data->port_id);
553 hw = eth_dev->data->dev_private;
554 dev = hw->virtio_user_dev;
555 virtio_user_dev_uninit(dev);
557 rte_free(eth_dev->data->dev_private);
558 rte_eth_dev_release_port(eth_dev);
563 static struct rte_vdev_driver virtio_user_driver = {
564 .probe = virtio_user_pmd_probe,
565 .remove = virtio_user_pmd_remove,
568 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver);
569 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user);
570 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user,