rte_ethdev_pci.h

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2017 Brocade Communications Systems, Inc.
 *   Author: Jan Blunck <jblunck@infradead.org>
 */

#ifndef _RTE_ETHDEV_PCI_H_
#define _RTE_ETHDEV_PCI_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <rte_malloc.h>
#include <rte_pci.h>
#include <rte_bus_pci.h>
#include <rte_config.h>
#include <rte_ethdev_driver.h>

static inline void
rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
    struct rte_pci_device *pci_dev)
{
    if ((eth_dev == NULL) || (pci_dev == NULL)) {
        RTE_ETHDEV_LOG(ERR, "NULL pointer eth_dev=%p pci_dev=%p",
            (void *)eth_dev, (void *)pci_dev);
        return;
    }

    eth_dev->intr_handle = &pci_dev->intr_handle;

    if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
        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;
        if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
            eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;

        eth_dev->data->kdrv = pci_dev->kdrv;
        eth_dev->data->numa_node = pci_dev->device.numa_node;
    }
}

static inline int
eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device)
{
    struct rte_pci_device *pci_dev = (struct rte_pci_device *)bus_device;

    if (!pci_dev)
        return -ENODEV;

    rte_eth_copy_pci_info(eth_dev, pci_dev);

    return 0;
}

static inline struct rte_eth_dev *
rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
{
    struct rte_eth_dev *eth_dev;
    const char *name;

    if (!dev)
        return NULL;

    name = dev->device.name;

    if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
        eth_dev = rte_eth_dev_allocate(name);
        if (!eth_dev)
            return NULL;

        if (private_data_size) {
            eth_dev->data->dev_private = rte_zmalloc_socket(name,
                private_data_size, RTE_CACHE_LINE_SIZE,
                dev->device.numa_node);
            if (!eth_dev->data->dev_private) {
                rte_eth_dev_release_port(eth_dev);
                return NULL;
            }
        }
    } else {
        eth_dev = rte_eth_dev_attach_secondary(name);
        if (!eth_dev)
            return NULL;
    }

    eth_dev->device = &dev->device;
    rte_eth_copy_pci_info(eth_dev, dev);
    return eth_dev;
}

static inline void
rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
{
    eth_dev->device = NULL;
    eth_dev->intr_handle = NULL;

    /* free ether device */
    rte_eth_dev_release_port(eth_dev);
}

typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);

static inline int
rte_eth_dev_pci_generic_probe(struct rte_pci_device *pci_dev,
    size_t private_data_size, eth_dev_pci_callback_t dev_init)
{
    struct rte_eth_dev *eth_dev;
    int ret;

    eth_dev = rte_eth_dev_pci_allocate(pci_dev, private_data_size);
    if (!eth_dev)
        return -ENOMEM;

    RTE_FUNC_PTR_OR_ERR_RET(*dev_init, -EINVAL);
    ret = dev_init(eth_dev);
    if (ret)
        rte_eth_dev_pci_release(eth_dev);
    else
        rte_eth_dev_probing_finish(eth_dev);

    return ret;
}

static inline int
rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
    eth_dev_pci_callback_t dev_uninit)
{
    struct rte_eth_dev *eth_dev;
    int ret;

    eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
    if (!eth_dev)
        return 0;

    /*
     * In secondary process, a released eth device can be found by its name
     * in shared memory.
     * If the state of the eth device is RTE_ETH_DEV_UNUSED, it means the
     * eth device has been released.
     */
    if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
        eth_dev->state == RTE_ETH_DEV_UNUSED)
        return 0;

    if (dev_uninit) {
        ret = dev_uninit(eth_dev);
        if (ret)
            return ret;
    }

    rte_eth_dev_pci_release(eth_dev);
    return 0;
}

#ifdef __cplusplus
}
#endif

#endif /* _RTE_ETHDEV_PCI_H_ */