#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <rte_malloc.h>
+#include <rte_kvargs.h>
+#include <rte_ethdev_vdev.h>
+#include <rte_bus_vdev.h>
+#include <rte_alarm.h>
+
+#include "virtio_ethdev.h"
#include "virtio_logs.h"
#include "virtio_pci.h"
#include "virtqueue.h"
+#include "virtio_rxtx.h"
#include "virtio_user/virtio_user_dev.h"
#define virtio_user_get_dev(hw) \
((struct virtio_user_dev *)(hw)->virtio_user_dev)
+static void
+virtio_user_delayed_handler(void *param)
+{
+ struct virtio_hw *hw = (struct virtio_hw *)param;
+ struct rte_eth_dev *dev = &rte_eth_devices[hw->port_id];
+
+ rte_intr_callback_unregister(dev->intr_handle,
+ virtio_interrupt_handler,
+ dev);
+}
+
static void
virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
void *dst, int length)
return;
}
- if (offset == offsetof(struct virtio_net_config, status))
+ if (offset == offsetof(struct virtio_net_config, status)) {
+ char buf[128];
+
+ if (dev->vhostfd >= 0) {
+ int r;
+ int flags;
+
+ flags = fcntl(dev->vhostfd, F_GETFL);
+ if (fcntl(dev->vhostfd, F_SETFL,
+ flags | O_NONBLOCK) == -1) {
+ PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag");
+ return;
+ }
+ r = recv(dev->vhostfd, buf, 128, MSG_PEEK);
+ if (r == 0 || (r < 0 && errno != EAGAIN)) {
+ dev->status &= (~VIRTIO_NET_S_LINK_UP);
+ PMD_DRV_LOG(ERR, "virtio-user port %u is down",
+ hw->port_id);
+ /* Only client mode is available now. Once the
+ * connection is broken, it can never be up
+ * again. Besides, this function could be called
+ * in the process of interrupt handling,
+ * callback cannot be unregistered here, set an
+ * alarm to do it.
+ */
+ rte_eal_alarm_set(1,
+ virtio_user_delayed_handler,
+ (void *)hw);
+ } else {
+ dev->status |= VIRTIO_NET_S_LINK_UP;
+ }
+ fcntl(dev->vhostfd, F_SETFL, flags & (~O_NONBLOCK));
+ }
*(uint16_t *)dst = dev->status;
+ }
if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
*(uint16_t *)dst = dev->max_queue_pairs;
for (i = 0; i < ETHER_ADDR_LEN; ++i)
dev->mac_addr[i] = ((const uint8_t *)src)[i];
else
- PMD_DRV_LOG(ERR, "not supported offset=%" PRIu64 ", len=%d\n",
+ PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d",
offset, length);
}
static void
-virtio_user_set_status(struct virtio_hw *hw, uint8_t status)
+virtio_user_reset(struct virtio_hw *hw)
{
struct virtio_user_dev *dev = virtio_user_get_dev(hw);
- if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
- virtio_user_start_device(dev);
- dev->status = status;
+ if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
+ virtio_user_stop_device(dev);
}
static void
-virtio_user_reset(struct virtio_hw *hw)
+virtio_user_set_status(struct virtio_hw *hw, uint8_t status)
{
struct virtio_user_dev *dev = virtio_user_get_dev(hw);
- virtio_user_stop_device(dev);
+ if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
+ virtio_user_start_device(dev);
+ else if (status == VIRTIO_CONFIG_STATUS_RESET)
+ virtio_user_reset(hw);
+ dev->status = status;
}
static uint8_t
{
struct virtio_user_dev *dev = virtio_user_get_dev(hw);
- return dev->features;
+ /* unmask feature bits defined in vhost user protocol */
+ return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES;
}
static void
{
struct virtio_user_dev *dev = virtio_user_get_dev(hw);
- dev->features = features;
+ dev->features = features & dev->device_features;
}
static uint8_t
virtio_user_get_isr(struct virtio_hw *hw __rte_unused)
{
- /* When config interrupt happens, driver calls this function to query
- * what kinds of change happen. Interrupt mode not supported for now.
+ /* rxq interrupts and config interrupt are separated in virtio-user,
+ * here we only report config change.
*/
- return 0;
+ return VIRTIO_PCI_ISR_CONFIG;
}
static uint16_t
virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused,
uint16_t vec __rte_unused)
{
- return VIRTIO_MSI_NO_VECTOR;
+ return 0;
+}
+
+static uint16_t
+virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused,
+ struct virtqueue *vq __rte_unused,
+ uint16_t vec)
+{
+ /* pretend we have done that */
+ return vec;
}
/* This function is to get the queue size, aka, number of descs, of a specified
uint64_t buf = 1;
struct virtio_user_dev *dev = virtio_user_get_dev(hw);
+ if (hw->cvq && (hw->cvq->vq == vq)) {
+ virtio_user_handle_cq(dev, vq->vq_queue_index);
+ return;
+ }
+
if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0)
- PMD_DRV_LOG(ERR, "failed to kick backend: %s\n",
+ PMD_DRV_LOG(ERR, "failed to kick backend: %s",
strerror(errno));
}
-static const struct virtio_pci_ops virtio_user_ops = {
+const struct virtio_pci_ops virtio_user_ops = {
.read_dev_cfg = virtio_user_read_dev_config,
.write_dev_cfg = virtio_user_write_dev_config,
.reset = virtio_user_reset,
.set_features = virtio_user_set_features,
.get_isr = virtio_user_get_isr,
.set_config_irq = virtio_user_set_config_irq,
+ .set_queue_irq = virtio_user_set_queue_irq,
.get_queue_num = virtio_user_get_queue_num,
.setup_queue = virtio_user_setup_queue,
.del_queue = virtio_user_del_queue,
.notify_queue = virtio_user_notify_queue,
};
+
+static const char *valid_args[] = {
+#define VIRTIO_USER_ARG_QUEUES_NUM "queues"
+ VIRTIO_USER_ARG_QUEUES_NUM,
+#define VIRTIO_USER_ARG_CQ_NUM "cq"
+ VIRTIO_USER_ARG_CQ_NUM,
+#define VIRTIO_USER_ARG_MAC "mac"
+ VIRTIO_USER_ARG_MAC,
+#define VIRTIO_USER_ARG_PATH "path"
+ VIRTIO_USER_ARG_PATH,
+#define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size"
+ VIRTIO_USER_ARG_QUEUE_SIZE,
+#define VIRTIO_USER_ARG_INTERFACE_NAME "iface"
+ VIRTIO_USER_ARG_INTERFACE_NAME,
+ NULL
+};
+
+#define VIRTIO_USER_DEF_CQ_EN 0
+#define VIRTIO_USER_DEF_Q_NUM 1
+#define VIRTIO_USER_DEF_Q_SZ 256
+
+static int
+get_string_arg(const char *key __rte_unused,
+ const char *value, void *extra_args)
+{
+ if (!value || !extra_args)
+ return -EINVAL;
+
+ *(char **)extra_args = strdup(value);
+
+ if (!*(char **)extra_args)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int
+get_integer_arg(const char *key __rte_unused,
+ const char *value, void *extra_args)
+{
+ if (!value || !extra_args)
+ return -EINVAL;
+
+ *(uint64_t *)extra_args = strtoull(value, NULL, 0);
+
+ return 0;
+}
+
+static struct rte_vdev_driver virtio_user_driver;
+
+static struct rte_eth_dev *
+virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev)
+{
+ struct rte_eth_dev *eth_dev;
+ struct rte_eth_dev_data *data;
+ struct virtio_hw *hw;
+ struct virtio_user_dev *dev;
+
+ eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw));
+ if (!eth_dev) {
+ PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev");
+ return NULL;
+ }
+
+ data = eth_dev->data;
+ hw = eth_dev->data->dev_private;
+
+ dev = rte_zmalloc(NULL, sizeof(*dev), 0);
+ if (!dev) {
+ PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed");
+ rte_eth_dev_release_port(eth_dev);
+ rte_free(hw);
+ return NULL;
+ }
+
+ hw->port_id = data->port_id;
+ dev->port_id = data->port_id;
+ virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops;
+ /*
+ * MSIX is required to enable LSC (see virtio_init_device).
+ * Here just pretend that we support msix.
+ */
+ hw->use_msix = 1;
+ hw->modern = 0;
+ hw->use_simple_rx = 0;
+ hw->use_simple_tx = 0;
+ hw->virtio_user_dev = dev;
+ return eth_dev;
+}
+
+static void
+virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev)
+{
+ struct rte_eth_dev_data *data = eth_dev->data;
+ struct virtio_hw *hw = data->dev_private;
+
+ rte_free(hw->virtio_user_dev);
+ rte_free(hw);
+ rte_eth_dev_release_port(eth_dev);
+}
+
+/* Dev initialization routine. Invoked once for each virtio vdev at
+ * EAL init time, see rte_bus_probe().
+ * Returns 0 on success.
+ */
+static int
+virtio_user_pmd_probe(struct rte_vdev_device *dev)
+{
+ struct rte_kvargs *kvlist = NULL;
+ struct rte_eth_dev *eth_dev;
+ struct virtio_hw *hw;
+ uint64_t queues = VIRTIO_USER_DEF_Q_NUM;
+ uint64_t cq = VIRTIO_USER_DEF_CQ_EN;
+ uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ;
+ char *path = NULL;
+ char *ifname = NULL;
+ char *mac_addr = NULL;
+ int ret = -1;
+
+ kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args);
+ if (!kvlist) {
+ PMD_INIT_LOG(ERR, "error when parsing param");
+ goto end;
+ }
+
+ if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) {
+ if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH,
+ &get_string_arg, &path) < 0) {
+ PMD_INIT_LOG(ERR, "error to parse %s",
+ VIRTIO_USER_ARG_PATH);
+ goto end;
+ }
+ } else {
+ PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user",
+ VIRTIO_USER_ARG_QUEUE_SIZE);
+ goto end;
+ }
+
+ if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) {
+ if (is_vhost_user_by_type(path)) {
+ PMD_INIT_LOG(ERR,
+ "arg %s applies only to vhost-kernel backend",
+ VIRTIO_USER_ARG_INTERFACE_NAME);
+ goto end;
+ }
+
+ if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME,
+ &get_string_arg, &ifname) < 0) {
+ PMD_INIT_LOG(ERR, "error to parse %s",
+ VIRTIO_USER_ARG_INTERFACE_NAME);
+ goto end;
+ }
+ }
+
+ if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) {
+ if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC,
+ &get_string_arg, &mac_addr) < 0) {
+ PMD_INIT_LOG(ERR, "error to parse %s",
+ VIRTIO_USER_ARG_MAC);
+ goto end;
+ }
+ }
+
+ if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) {
+ if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE,
+ &get_integer_arg, &queue_size) < 0) {
+ PMD_INIT_LOG(ERR, "error to parse %s",
+ VIRTIO_USER_ARG_QUEUE_SIZE);
+ goto end;
+ }
+ }
+
+ if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) {
+ if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM,
+ &get_integer_arg, &queues) < 0) {
+ PMD_INIT_LOG(ERR, "error to parse %s",
+ VIRTIO_USER_ARG_QUEUES_NUM);
+ goto end;
+ }
+ }
+
+ if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) {
+ if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM,
+ &get_integer_arg, &cq) < 0) {
+ PMD_INIT_LOG(ERR, "error to parse %s",
+ VIRTIO_USER_ARG_CQ_NUM);
+ goto end;
+ }
+ } else if (queues > 1) {
+ cq = 1;
+ }
+
+ if (queues > 1 && cq == 0) {
+ PMD_INIT_LOG(ERR, "multi-q requires ctrl-q");
+ goto end;
+ }
+
+ if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) {
+ PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u",
+ VIRTIO_USER_ARG_QUEUES_NUM, queues,
+ VIRTIO_MAX_VIRTQUEUE_PAIRS);
+ goto end;
+ }
+
+ if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+ eth_dev = virtio_user_eth_dev_alloc(dev);
+ if (!eth_dev) {
+ PMD_INIT_LOG(ERR, "virtio_user fails to alloc device");
+ goto end;
+ }
+
+ hw = eth_dev->data->dev_private;
+ if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq,
+ queue_size, mac_addr, &ifname) < 0) {
+ PMD_INIT_LOG(ERR, "virtio_user_dev_init fails");
+ virtio_user_eth_dev_free(eth_dev);
+ goto end;
+ }
+ } else {
+ eth_dev = rte_eth_dev_attach_secondary(rte_vdev_device_name(dev));
+ if (!eth_dev)
+ goto end;
+ }
+
+ /* previously called by rte_pci_probe() for physical dev */
+ if (eth_virtio_dev_init(eth_dev) < 0) {
+ PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
+ virtio_user_eth_dev_free(eth_dev);
+ goto end;
+ }
+ ret = 0;
+
+end:
+ if (kvlist)
+ rte_kvargs_free(kvlist);
+ if (path)
+ free(path);
+ if (mac_addr)
+ free(mac_addr);
+ if (ifname)
+ free(ifname);
+ return ret;
+}
+
+/** Called by rte_eth_dev_detach() */
+static int
+virtio_user_pmd_remove(struct rte_vdev_device *vdev)
+{
+ const char *name;
+ struct rte_eth_dev *eth_dev;
+ struct virtio_hw *hw;
+ struct virtio_user_dev *dev;
+
+ if (!vdev)
+ return -EINVAL;
+
+ name = rte_vdev_device_name(vdev);
+ PMD_DRV_LOG(INFO, "Un-Initializing %s", name);
+ eth_dev = rte_eth_dev_allocated(name);
+ if (!eth_dev)
+ return -ENODEV;
+
+ /* make sure the device is stopped, queues freed */
+ rte_eth_dev_close(eth_dev->data->port_id);
+
+ hw = eth_dev->data->dev_private;
+ dev = hw->virtio_user_dev;
+ virtio_user_dev_uninit(dev);
+
+ rte_free(eth_dev->data->dev_private);
+ rte_eth_dev_release_port(eth_dev);
+
+ return 0;
+}
+
+static struct rte_vdev_driver virtio_user_driver = {
+ .probe = virtio_user_pmd_probe,
+ .remove = virtio_user_pmd_remove,
+};
+
+RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver);
+RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user);
+RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user,
+ "path=<path> "
+ "mac=<mac addr> "
+ "cq=<int> "
+ "queue_size=<int> "
+ "queues=<int> "
+ "iface=<string>");
git.droids-corp.org / dpdk.git / blobdiff