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35 #include <sys/types.h>
38 #include <rte_malloc.h>
39 #include <rte_kvargs.h>
42 #include "virtio_ethdev.h"
43 #include "virtio_logs.h"
44 #include "virtio_pci.h"
45 #include "virtqueue.h"
46 #include "virtio_rxtx.h"
47 #include "virtio_user/virtio_user_dev.h"
49 #define virtio_user_get_dev(hw) \
50 ((struct virtio_user_dev *)(hw)->virtio_user_dev)
53 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
54 void *dst, int length)
57 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
59 if (offset == offsetof(struct virtio_net_config, mac) &&
60 length == ETHER_ADDR_LEN) {
61 for (i = 0; i < ETHER_ADDR_LEN; ++i)
62 ((uint8_t *)dst)[i] = dev->mac_addr[i];
66 if (offset == offsetof(struct virtio_net_config, status))
67 *(uint16_t *)dst = dev->status;
69 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
70 *(uint16_t *)dst = dev->max_queue_pairs;
74 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset,
75 const void *src, int length)
78 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
80 if ((offset == offsetof(struct virtio_net_config, mac)) &&
81 (length == ETHER_ADDR_LEN))
82 for (i = 0; i < ETHER_ADDR_LEN; ++i)
83 dev->mac_addr[i] = ((const uint8_t *)src)[i];
85 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d\n",
90 virtio_user_set_status(struct virtio_hw *hw, uint8_t status)
92 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
94 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
95 virtio_user_start_device(dev);
100 virtio_user_reset(struct virtio_hw *hw)
102 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
104 virtio_user_stop_device(dev);
108 virtio_user_get_status(struct virtio_hw *hw)
110 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
116 virtio_user_get_features(struct virtio_hw *hw)
118 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
120 return dev->features;
124 virtio_user_set_features(struct virtio_hw *hw, uint64_t features)
126 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
128 dev->features = features;
132 virtio_user_get_isr(struct virtio_hw *hw __rte_unused)
134 /* When config interrupt happens, driver calls this function to query
135 * what kinds of change happen. Interrupt mode not supported for now.
141 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused,
142 uint16_t vec __rte_unused)
144 return VIRTIO_MSI_NO_VECTOR;
147 /* This function is to get the queue size, aka, number of descs, of a specified
148 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the
149 * max supported queues.
152 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused)
154 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
156 /* Currently, each queue has same queue size */
157 return dev->queue_size;
161 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
163 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
164 uint16_t queue_idx = vq->vq_queue_index;
165 uint64_t desc_addr, avail_addr, used_addr;
167 desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
168 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
169 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
170 ring[vq->vq_nentries]),
171 VIRTIO_PCI_VRING_ALIGN);
173 dev->vrings[queue_idx].num = vq->vq_nentries;
174 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr;
175 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr;
176 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr;
182 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq)
184 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU
185 * correspondingly stops the ioeventfds, and reset the status of
187 * For modern devices, set queue desc, avail, used in PCI bar to 0,
188 * not see any more behavior in QEMU.
190 * Here we just care about what information to deliver to vhost-user
191 * or vhost-kernel. So we just close ioeventfd for now.
193 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
195 close(dev->callfds[vq->vq_queue_index]);
196 close(dev->kickfds[vq->vq_queue_index]);
200 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq)
203 struct virtio_user_dev *dev = virtio_user_get_dev(hw);
205 if (hw->cvq && (hw->cvq->vq == vq)) {
206 virtio_user_handle_cq(dev, vq->vq_queue_index);
210 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0)
211 PMD_DRV_LOG(ERR, "failed to kick backend: %s\n",
215 static const struct virtio_pci_ops virtio_user_ops = {
216 .read_dev_cfg = virtio_user_read_dev_config,
217 .write_dev_cfg = virtio_user_write_dev_config,
218 .reset = virtio_user_reset,
219 .get_status = virtio_user_get_status,
220 .set_status = virtio_user_set_status,
221 .get_features = virtio_user_get_features,
222 .set_features = virtio_user_set_features,
223 .get_isr = virtio_user_get_isr,
224 .set_config_irq = virtio_user_set_config_irq,
225 .get_queue_num = virtio_user_get_queue_num,
226 .setup_queue = virtio_user_setup_queue,
227 .del_queue = virtio_user_del_queue,
228 .notify_queue = virtio_user_notify_queue,
231 static const char *valid_args[] = {
232 #define VIRTIO_USER_ARG_QUEUES_NUM "queues"
233 VIRTIO_USER_ARG_QUEUES_NUM,
234 #define VIRTIO_USER_ARG_CQ_NUM "cq"
235 VIRTIO_USER_ARG_CQ_NUM,
236 #define VIRTIO_USER_ARG_MAC "mac"
238 #define VIRTIO_USER_ARG_PATH "path"
239 VIRTIO_USER_ARG_PATH,
240 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size"
241 VIRTIO_USER_ARG_QUEUE_SIZE,
245 #define VIRTIO_USER_DEF_CQ_EN 0
246 #define VIRTIO_USER_DEF_Q_NUM 1
247 #define VIRTIO_USER_DEF_Q_SZ 256
250 get_string_arg(const char *key __rte_unused,
251 const char *value, void *extra_args)
253 if (!value || !extra_args)
256 *(char **)extra_args = strdup(value);
262 get_integer_arg(const char *key __rte_unused,
263 const char *value, void *extra_args)
265 if (!value || !extra_args)
268 *(uint64_t *)extra_args = strtoull(value, NULL, 0);
273 static struct rte_eth_dev *
274 virtio_user_eth_dev_alloc(const char *name)
276 struct rte_eth_dev *eth_dev;
277 struct rte_eth_dev_data *data;
278 struct virtio_hw *hw;
279 struct virtio_user_dev *dev;
281 eth_dev = rte_eth_dev_allocate(name);
283 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev");
287 data = eth_dev->data;
289 hw = rte_zmalloc(NULL, sizeof(*hw), 0);
291 PMD_INIT_LOG(ERR, "malloc virtio_hw failed");
292 rte_eth_dev_release_port(eth_dev);
296 dev = rte_zmalloc(NULL, sizeof(*dev), 0);
298 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed");
299 rte_eth_dev_release_port(eth_dev);
304 hw->vtpci_ops = &virtio_user_ops;
307 hw->use_simple_rxtx = 0;
308 hw->virtio_user_dev = dev;
309 data->dev_private = hw;
310 data->numa_node = SOCKET_ID_ANY;
311 data->kdrv = RTE_KDRV_NONE;
312 data->dev_flags = RTE_ETH_DEV_DETACHABLE;
313 eth_dev->pci_dev = NULL;
314 eth_dev->driver = NULL;
319 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev)
321 struct rte_eth_dev_data *data = eth_dev->data;
322 struct virtio_hw *hw = data->dev_private;
324 rte_free(hw->virtio_user_dev);
326 rte_eth_dev_release_port(eth_dev);
329 /* Dev initialization routine. Invoked once for each virtio vdev at
330 * EAL init time, see rte_eal_dev_init().
331 * Returns 0 on success.
334 virtio_user_pmd_probe(const char *name, const char *params)
336 struct rte_kvargs *kvlist = NULL;
337 struct rte_eth_dev *eth_dev;
338 struct virtio_hw *hw;
339 uint64_t queues = VIRTIO_USER_DEF_Q_NUM;
340 uint64_t cq = VIRTIO_USER_DEF_CQ_EN;
341 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ;
343 char *mac_addr = NULL;
346 if (!params || params[0] == '\0') {
347 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user",
348 VIRTIO_USER_ARG_QUEUE_SIZE);
352 kvlist = rte_kvargs_parse(params, valid_args);
354 PMD_INIT_LOG(ERR, "error when parsing param");
358 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) {
359 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH,
360 &get_string_arg, &path) < 0) {
361 PMD_INIT_LOG(ERR, "error to parse %s",
362 VIRTIO_USER_ARG_PATH);
366 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user\n",
367 VIRTIO_USER_ARG_QUEUE_SIZE);
371 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) {
372 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC,
373 &get_string_arg, &mac_addr) < 0) {
374 PMD_INIT_LOG(ERR, "error to parse %s",
375 VIRTIO_USER_ARG_MAC);
380 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) {
381 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE,
382 &get_integer_arg, &queue_size) < 0) {
383 PMD_INIT_LOG(ERR, "error to parse %s",
384 VIRTIO_USER_ARG_QUEUE_SIZE);
389 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) {
390 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM,
391 &get_integer_arg, &queues) < 0) {
392 PMD_INIT_LOG(ERR, "error to parse %s",
393 VIRTIO_USER_ARG_QUEUES_NUM);
398 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) {
399 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM,
400 &get_integer_arg, &cq) < 0) {
401 PMD_INIT_LOG(ERR, "error to parse %s",
402 VIRTIO_USER_ARG_CQ_NUM);
405 } else if (queues > 1) {
409 if (queues > 1 && cq == 0) {
410 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q");
414 eth_dev = virtio_user_eth_dev_alloc(name);
416 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device");
420 hw = eth_dev->data->dev_private;
421 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq,
422 queue_size, mac_addr) < 0) {
423 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails");
424 virtio_user_eth_dev_free(eth_dev);
428 /* previously called by rte_eal_pci_probe() for physical dev */
429 if (eth_virtio_dev_init(eth_dev) < 0) {
430 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
431 virtio_user_eth_dev_free(eth_dev);
438 rte_kvargs_free(kvlist);
446 /** Called by rte_eth_dev_detach() */
448 virtio_user_pmd_remove(const char *name)
450 struct rte_eth_dev *eth_dev;
451 struct virtio_hw *hw;
452 struct virtio_user_dev *dev;
457 PMD_DRV_LOG(INFO, "Un-Initializing %s\n", name);
458 eth_dev = rte_eth_dev_allocated(name);
462 /* make sure the device is stopped, queues freed */
463 rte_eth_dev_close(eth_dev->data->port_id);
465 hw = eth_dev->data->dev_private;
466 dev = hw->virtio_user_dev;
467 virtio_user_dev_uninit(dev);
469 rte_free(eth_dev->data->dev_private);
470 rte_free(eth_dev->data);
471 rte_eth_dev_release_port(eth_dev);
476 static struct rte_vdev_driver virtio_user_driver = {
477 .probe = virtio_user_pmd_probe,
478 .remove = virtio_user_pmd_remove,
481 DRIVER_REGISTER_VDEV(net_virtio_user, virtio_user_driver);
482 DRIVER_REGISTER_PARAM_STRING(net_virtio_user,