Some users want to use their own epoll instances to control both
DPDK rxq interrupt fds and their own other fds. So added a function
to get rxq interrupt fd based on port id and queue id.
Signed-off-by: Xiaoyun Li <xiaoyun...@intel.com>
---
v2:
* Added missing API doxygen comments.
* Set the new API to be experimental and added it in .map file.
---
lib/librte_ethdev/rte_ethdev.c | 37 ++++++++++++++++++++++++
lib/librte_ethdev/rte_ethdev.h | 22 ++++++++++++++
lib/librte_ethdev/rte_ethdev_version.map | 1 +
3 files changed, 60 insertions(+)
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index ef99f7068..7c580ec68 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -3433,6 +3433,43 @@ rte_eth_dev_rx_intr_ctl(uint16_t port_id, int epfd, int
op, void *data)
return 0;
}
+int __rte_experimental
+rte_eth_dev_rx_intr_ctl_q_get_fd(uint16_t port_id, uint16_t queue_id,
+ int *fd)
+{
+ struct rte_intr_handle *intr_handle;
+ struct rte_eth_dev *dev;
+ unsigned int efd_idx;
+ uint32_t vec;
+
+ RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+
+ dev = &rte_eth_devices[port_id];
+
+ if (queue_id >= dev->data->nb_rx_queues) {
+ RTE_ETHDEV_LOG(ERR, "Invalid RX queue_id=%u\n", queue_id);
+ return -EINVAL;
+ }
+
+ if (!dev->intr_handle) {
+ RTE_ETHDEV_LOG(ERR, "RX Intr handle unset\n");
+ return -ENOTSUP;
+ }
+
+ intr_handle = dev->intr_handle;
+ if (!intr_handle->intr_vec) {
+ RTE_ETHDEV_LOG(ERR, "RX Intr vector unset\n");
+ return -EPERM;
+ }
+
+ vec = intr_handle->intr_vec[queue_id];
+ efd_idx = (vec >= RTE_INTR_VEC_RXTX_OFFSET) ?
+ (vec - RTE_INTR_VEC_RXTX_OFFSET) : vec;
+ *fd = intr_handle->efds[efd_idx];
+
+ return 0;
+}
+
const struct rte_memzone *
rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, const char *ring_name,
uint16_t queue_id, size_t size, unsigned align,
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 012577b0a..8f6a5d08b 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -2719,6 +2719,28 @@ int rte_eth_dev_rx_intr_ctl(uint16_t port_id, int epfd,
int op, void *data);
int rte_eth_dev_rx_intr_ctl_q(uint16_t port_id, uint16_t queue_id,
int epfd, int op, void *data);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Get interrupt fd per Rx queue.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @param queue_id
+ * The index of the receive queue from which to retrieve input packets.
+ * The value must be in the range [0, nb_rx_queue - 1] previously supplied
+ * to rte_eth_dev_configure().
+ * @param fd
+ * The interrupt fd which the requested Rx queue associated to.
+ * @return
+ * - On success, zero.
+ * - On failure, a negative value.
+ */
+int __rte_experimental
+rte_eth_dev_rx_intr_ctl_q_get_fd(uint16_t port_id, uint16_t queue_id,
+ int *fd);
+
/**
* Turn on the LED on the Ethernet device.
* This function turns on the LED on the Ethernet device.
diff --git a/lib/librte_ethdev/rte_ethdev_version.map
b/lib/librte_ethdev/rte_ethdev_version.map
index 38f117f01..c98f9fa4a 100644
--- a/lib/librte_ethdev/rte_ethdev_version.map
+++ b/lib/librte_ethdev/rte_ethdev_version.map
@@ -235,6 +235,7 @@ EXPERIMENTAL {
rte_eth_dev_owner_new;
rte_eth_dev_owner_set;
rte_eth_dev_owner_unset;
+ rte_eth_dev_rx_intr_ctl_q_get_fd;
rte_eth_dev_rx_offload_name;
rte_eth_dev_tx_offload_name;
rte_eth_switch_domain_alloc;
--
2.17.1
