+/**
+ * Uninstall interrupt handler.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param dev
+ * Pointer to the rte_eth_dev structure.
+ * @return
+ * 0 on success, negative value on error.
+ */
+static int
+priv_dev_removal_interrupt_handler_uninstall(struct priv *priv,
+ struct rte_eth_dev *dev)
+{
+ if (dev->data->dev_conf.intr_conf.rmv) {
+ priv->intr_conf.rmv = 0;
+ return priv_dev_interrupt_handler_uninstall(priv, dev);
+ }
+ return 0;
+}
+
+/**
+ * Uninstall interrupt handler.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param dev
+ * Pointer to the rte_eth_dev structure.
+ * @return
+ * 0 on success, negative value on error,
+ */
+static int
+priv_dev_link_interrupt_handler_uninstall(struct priv *priv,
+ struct rte_eth_dev *dev)
+{
+ int ret = 0;
+
+ if (dev->data->dev_conf.intr_conf.lsc) {
+ priv->intr_conf.lsc = 0;
+ ret = priv_dev_interrupt_handler_uninstall(priv, dev);
+ if (ret)
+ return ret;
+ }
+ if (priv->pending_alarm)
+ if (rte_eal_alarm_cancel(mlx4_dev_link_status_handler,
+ dev)) {
+ ERROR("rte_eal_alarm_cancel failed "
+ " (errno: %s)", strerror(rte_errno));
+ return -rte_errno;
+ }
+ priv->pending_alarm = 0;
+ return 0;
+}
+
+/**
+ * Install link interrupt handler.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param dev
+ * Pointer to the rte_eth_dev structure.
+ * @return
+ * 0 on success, negative value on error.
+ */
+static int
+priv_dev_link_interrupt_handler_install(struct priv *priv,
+ struct rte_eth_dev *dev)
+{
+ int ret;
+
+ if (dev->data->dev_conf.intr_conf.lsc) {
+ ret = priv_dev_interrupt_handler_install(priv, dev);
+ if (ret)
+ return ret;
+ priv->intr_conf.lsc = 1;
+ }
+ return 0;
+}
+
+/**
+ * Install removal interrupt handler.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param dev
+ * Pointer to the rte_eth_dev structure.
+ * @return
+ * 0 on success, negative value on error.
+ */
+static int
+priv_dev_removal_interrupt_handler_install(struct priv *priv,
+ struct rte_eth_dev *dev)
+{
+ int ret;
+
+ if (dev->data->dev_conf.intr_conf.rmv) {
+ ret = priv_dev_interrupt_handler_install(priv, dev);
+ if (ret)
+ return ret;
+ priv->intr_conf.rmv = 1;
+ }
+ return 0;
+}
+
+/**
+ * Allocate queue vector and fill epoll fd list for Rx interrupts.
+ *
+ * @param priv
+ * Pointer to private structure.
+ *
+ * @return
+ * 0 on success, negative on failure.
+ */
+static int
+priv_rx_intr_vec_enable(struct priv *priv)
+{
+ unsigned int i;
+ unsigned int rxqs_n = priv->rxqs_n;
+ unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
+ unsigned int count = 0;
+ struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
+
+ if (!priv->dev->data->dev_conf.intr_conf.rxq)
+ return 0;
+ priv_rx_intr_vec_disable(priv);
+ intr_handle->intr_vec = malloc(sizeof(intr_handle->intr_vec[rxqs_n]));
+ if (intr_handle->intr_vec == NULL) {
+ ERROR("failed to allocate memory for interrupt vector,"
+ " Rx interrupts will not be supported");
+ return -ENOMEM;
+ }
+ intr_handle->type = RTE_INTR_HANDLE_EXT;
+ for (i = 0; i != n; ++i) {
+ struct rxq *rxq = (*priv->rxqs)[i];
+ int fd;
+ int flags;
+ int rc;
+
+ /* Skip queues that cannot request interrupts. */
+ if (!rxq || !rxq->channel) {
+ /* Use invalid intr_vec[] index to disable entry. */
+ intr_handle->intr_vec[i] =
+ RTE_INTR_VEC_RXTX_OFFSET +
+ RTE_MAX_RXTX_INTR_VEC_ID;
+ continue;
+ }
+ if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
+ ERROR("too many Rx queues for interrupt vector size"
+ " (%d), Rx interrupts cannot be enabled",
+ RTE_MAX_RXTX_INTR_VEC_ID);
+ priv_rx_intr_vec_disable(priv);
+ return -1;
+ }
+ fd = rxq->channel->fd;
+ flags = fcntl(fd, F_GETFL);
+ rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
+ if (rc < 0) {
+ ERROR("failed to make Rx interrupt file descriptor"
+ " %d non-blocking for queue index %d", fd, i);
+ priv_rx_intr_vec_disable(priv);
+ return rc;
+ }
+ intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
+ intr_handle->efds[count] = fd;
+ count++;
+ }
+ if (!count)
+ priv_rx_intr_vec_disable(priv);
+ else
+ intr_handle->nb_efd = count;
+ return 0;
+}
+
+/**
+ * Clean up Rx interrupts handler.
+ *
+ * @param priv
+ * Pointer to private structure.
+ */
+static void
+priv_rx_intr_vec_disable(struct priv *priv)
+{
+ struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
+
+ rte_intr_free_epoll_fd(intr_handle);
+ free(intr_handle->intr_vec);
+ intr_handle->nb_efd = 0;
+ intr_handle->intr_vec = NULL;
+}
+
+/**
+ * DPDK callback for Rx queue interrupt enable.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param idx
+ * Rx queue index.
+ *
+ * @return
+ * 0 on success, negative on failure.
+ */
+static int
+mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct rxq *rxq = (*priv->rxqs)[idx];
+ int ret;
+
+ if (!rxq || !rxq->channel)
+ ret = EINVAL;
+ else
+ ret = ibv_req_notify_cq(rxq->cq, 0);
+ if (ret)
+ WARN("unable to arm interrupt on rx queue %d", idx);
+ return -ret;
+}
+
+/**
+ * DPDK callback for Rx queue interrupt disable.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param idx
+ * Rx queue index.
+ *
+ * @return
+ * 0 on success, negative on failure.
+ */
+static int
+mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct rxq *rxq = (*priv->rxqs)[idx];
+ struct ibv_cq *ev_cq;
+ void *ev_ctx;
+ int ret;
+
+ if (!rxq || !rxq->channel) {
+ ret = EINVAL;
+ } else {
+ ret = ibv_get_cq_event(rxq->cq->channel, &ev_cq, &ev_ctx);
+ if (ret || ev_cq != rxq->cq)
+ ret = EINVAL;
+ }
+ if (ret)
+ WARN("unable to disable interrupt on rx queue %d",
+ idx);
+ else
+ ibv_ack_cq_events(rxq->cq, 1);
+ return -ret;
+}
+
+/**
+ * Verify and store value for device argument.
+ *
+ * @param[in] key
+ * Key argument to verify.
+ * @param[in] val
+ * Value associated with key.
+ * @param out
+ * User data.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_arg_parse(const char *key, const char *val, void *out)
+{
+ struct mlx4_conf *conf = out;
+ unsigned long tmp;
+
+ errno = 0;
+ tmp = strtoul(val, NULL, 0);
+ if (errno) {
+ WARN("%s: \"%s\" is not a valid integer", key, val);
+ return -errno;
+ }
+ if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
+ if (tmp >= MLX4_PMD_MAX_PHYS_PORTS) {
+ ERROR("invalid port index %lu (max: %u)",
+ tmp, MLX4_PMD_MAX_PHYS_PORTS - 1);
+ return -EINVAL;
+ }
+ conf->active_ports |= 1 << tmp;
+ } else {
+ WARN("%s: unknown parameter", key);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * Parse device parameters.
+ *
+ * @param devargs
+ * Device arguments structure.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
+{
+ struct rte_kvargs *kvlist;
+ unsigned int arg_count;
+ int ret = 0;
+ int i;
+
+ if (devargs == NULL)
+ return 0;
+ kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
+ if (kvlist == NULL) {
+ ERROR("failed to parse kvargs");
+ return -EINVAL;
+ }
+ /* Process parameters. */
+ for (i = 0; pmd_mlx4_init_params[i]; ++i) {
+ arg_count = rte_kvargs_count(kvlist, MLX4_PMD_PORT_KVARG);
+ while (arg_count-- > 0) {
+ ret = rte_kvargs_process(kvlist, MLX4_PMD_PORT_KVARG,
+ mlx4_arg_parse, conf);
+ if (ret != 0)
+ goto free_kvlist;
+ }
+ }
+free_kvlist:
+ rte_kvargs_free(kvlist);
+ return ret;
+}
+
+static struct rte_pci_driver mlx4_driver;