ethdev: decouple interrupt handling from PCI device

The struct rte_intr_handle is an abstraction layer for different types of
interrupt mechanisms. It is embedded in the low-level device (e.g. PCI).
On allocation of a struct rte_eth_dev a reference to the intr_handle
should be stored for devices supporting interrupts.

Signed-off-by: Jan Blunck <jblunck@infradead.org>
Acked-by: Shreyansh Jain <shreyansh.jain@nxp.com>

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 9f60ff3..b455850 100644 (file)
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -262,6 +262,7 @@ rte_eth_dev_pci_probe(struct rte_pci_driver *pci_drv,
                        rte_panic("Cannot allocate memzone for private port data\n");
        }
        eth_dev->pci_dev = pci_dev;
+       eth_dev->intr_handle = &pci_dev->intr_handle;
        eth_dev->driver = eth_drv;
 
        /* Invoke PMD device initialization function */
@@ -2591,7 +2592,13 @@ rte_eth_dev_rx_intr_ctl(uint8_t port_id, int epfd, int op, void *data)
        RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 
        dev = &rte_eth_devices[port_id];
-       intr_handle = &dev->pci_dev->intr_handle;
+
+       if (!dev->intr_handle) {
+               RTE_PMD_DEBUG_TRACE("RX Intr handle unset\n");
+               return -ENOTSUP;
+       }
+
+       intr_handle = dev->intr_handle;
        if (!intr_handle->intr_vec) {
                RTE_PMD_DEBUG_TRACE("RX Intr vector unset\n");
                return -EPERM;
@@ -2651,7 +2658,12 @@ rte_eth_dev_rx_intr_ctl_q(uint8_t port_id, uint16_t queue_id,
                return -EINVAL;
        }
 
-       intr_handle = &dev->pci_dev->intr_handle;
+       if (!dev->intr_handle) {
+               RTE_PMD_DEBUG_TRACE("RX Intr handle unset\n");
+               return -ENOTSUP;
+       }
+
+       intr_handle = dev->intr_handle;
        if (!intr_handle->intr_vec) {
                RTE_PMD_DEBUG_TRACE("RX Intr vector unset\n");
                return -EPERM;
@@ -3253,6 +3265,8 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev, struct rte_pci_device *pci_de
                return;
        }
 
+       eth_dev->intr_handle = &pci_dev->intr_handle;
+
        eth_dev->data->dev_flags = 0;
        if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
                eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 272fd41..e1eae65 100644 (file)
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1625,6 +1625,7 @@ struct rte_eth_dev {
        const struct eth_driver *driver;/**< Driver for this device */
        const struct eth_dev_ops *dev_ops; /**< Functions exported by PMD */
        struct rte_pci_device *pci_dev; /**< PCI info. supplied by probing */
+       struct rte_intr_handle *intr_handle; /**< Device interrupt handle */
        /** User application callbacks for NIC interrupts */
        struct rte_eth_dev_cb_list link_intr_cbs;
        /**