Hi Declan,
> Add new bus generic ethdev create/destroy APIs which are bus independent
> and provide hooks for bus specific initialisation.
>
> Signed-off-by: Declan Doherty <declan.dohe...@intel.com>
> ---
> lib/librte_ether/rte_ethdev.c | 95
> ++++++++++++++++++++++++++++++++-
> lib/librte_ether/rte_ethdev_driver.h | 57 ++++++++++++++++++++
> lib/librte_ether/rte_ethdev_pci.h | 12 +++++
> lib/librte_ether/rte_ethdev_version.map | 8 +++
> 4 files changed, 171 insertions(+), 1 deletion(-)
>
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index 3c049ef43..b16d23b9a 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -348,7 +348,8 @@ rte_eth_dev_release_port(struct rte_eth_dev *eth_dev)
> rte_eth_dev_shared_data_prepare();
>
> rte_spinlock_lock(&rte_eth_dev_shared_data->ownership_lock);
> -
> + eth_dev->device = NULL;
> + eth_dev->intr_handle = NULL;
> eth_dev->state = RTE_ETH_DEV_UNUSED;
>
> memset(eth_dev->data, 0, sizeof(struct rte_eth_dev_data));
> @@ -3439,6 +3440,98 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev
> *dev, const char *ring_name,
> RTE_MEMZONE_IOVA_CONTIG, align);
> }
>
> +int __rte_experimental
> +rte_eth_dev_create(struct rte_device *device, const char *name,
> + size_t priv_data_size,
> + ethdev_bus_specific_init ethdev_bus_specific_init,
> + void *bus_init_params,
> + ethdev_init_t ethdev_init, void *init_params)
> +{
> + struct rte_eth_dev *ethdev;
> + int retval;
> +
> + if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
> + ethdev = rte_eth_dev_allocate(name);
> + if (!ethdev) {
> + retval = -ENODEV;
> + goto probe_failed;
> + }
> +
> + if (priv_data_size) {
> + ethdev->data->dev_private = rte_zmalloc_socket(
> + name, priv_data_size, RTE_CACHE_LINE_SIZE,
> + device->numa_node);
> +
> + if (!ethdev->data->dev_private) {
> + RTE_LOG(ERR, EAL, "failed to allocate private
> data");
> + retval = -ENOMEM;
> + goto probe_failed;
> + }
> + }
> + } else {
> + ethdev = rte_eth_dev_attach_secondary(name);
> + if (!ethdev) {
> + RTE_LOG(ERR, EAL, "secondary process attach failed, "
> + "ethdev doesn't exist");
> + retval = -ENODEV;
> + goto probe_failed;
> + }
> + }
> +
> + ethdev->device = device;
> +
> + if (ethdev_bus_specific_init) {
> + retval = ethdev_bus_specific_init(ethdev, bus_init_params);
> + if (retval) {
> + RTE_LOG(ERR, EAL,
> + "ethdev bus specific initialisation failed");
> + goto probe_failed;
> + }
> + }
> +
> + RTE_FUNC_PTR_OR_ERR_RET(*ethdev_init, -EINVAL);
You probably have to do it at the start - before allocating ethdev, etc.
> + retval = ethdev_init(ethdev, init_params);
> + if (retval) {
> + RTE_LOG(ERR, EAL, "ethdev initialisation failed");
> + goto probe_failed;
> + }
> +
> + return retval;
> +probe_failed:
> + /* free ports private data if primary process */
> + if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> + rte_free(ethdev->data->dev_private);
> +
> + rte_eth_dev_release_port(ethdev);
> +
> + return retval;
> +}
> +
> +int __rte_experimental
> +rte_eth_dev_destroy(struct rte_eth_dev *ethdev,
> + ethdev_uninit_t ethdev_uninit)
> +{
> + int ret;
> +
> + ethdev = rte_eth_dev_allocated(ethdev->data->name);
> + if (!ethdev)
> + return -ENODEV;
> +
> + RTE_FUNC_PTR_OR_ERR_RET(*ethdev_uninit, -EINVAL);
> + if (ethdev_uninit) {
> + ret = ethdev_uninit(ethdev);
> + if (ret)
> + return ret;
> + }
> +
> + if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> + rte_free(ethdev->data->dev_private);
> +
> + ethdev->data->dev_private = NULL;
> +
> + return rte_eth_dev_release_port(ethdev);
> +}
> +
> int
> rte_eth_dev_rx_intr_ctl_q(uint16_t port_id, uint16_t queue_id,
> int epfd, int op, void *data)
> diff --git a/lib/librte_ether/rte_ethdev_driver.h
> b/lib/librte_ether/rte_ethdev_driver.h
> index a406ef123..e52add0ad 100644
> --- a/lib/librte_ether/rte_ethdev_driver.h
> +++ b/lib/librte_ether/rte_ethdev_driver.h
> @@ -188,6 +188,63 @@ rte_eth_linkstatus_get(const struct rte_eth_dev *dev,
> #endif
> }
>
> +
> +typedef int (*ethdev_init_t)(struct rte_eth_dev *ethdev, void *init_params);
> +typedef int (*ethdev_bus_specific_init)(struct rte_eth_dev *ethdev,
> + void *bus_specific_init_params);
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change without prior notice.
> + *
> + * PMD helper function for the creation of a new ethdev ports.
> + *
> + * @param device
> + * rte_device handle.
> + * @param name
> + * port name.
> + * @param priv_data_size
> + * size of private data required for port.
> + * @param bus_specific_init
> + * port bus specific initialisation callback function
> + * @param bus_init_params
> + * port bus specific initialisation parameters
> + * @param ethdev_init
> + * device specific port initialization callback function
> + * @param init_params
> + * port initialisation parameters
> + *
> + * @return
> + * Negative errno value on error, 0 on success.
> + */
> +int __rte_experimental
> +rte_eth_dev_create(struct rte_device *device, const char *name,
> + size_t priv_data_size,
> + ethdev_bus_specific_init bus_specific_init, void *bus_init_params,
> + ethdev_init_t ethdev_init, void *init_params);
> +
> +
> +typedef int (*ethdev_uninit_t)(struct rte_eth_dev *ethdev);
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change without prior notice.
> + *
> + * PMD helper function for cleaing up the resources of a ethdev port on it's
> + * destruction.
> + *
> + * @param ethdev
> + * ethdev handle of port.
> + * @param ethdev
> + * device specific port un-initialise callback function
> + *
> + * @return
> + * Negative errno value on error, 0 on success.
> + */
> +int __rte_experimental
> +rte_eth_dev_destroy(struct rte_eth_dev *ethdev,
> + ethdev_uninit_t ethdev_uninit);
> +
> #ifdef __cplusplus
> }
> #endif
> diff --git a/lib/librte_ether/rte_ethdev_pci.h
> b/lib/librte_ether/rte_ethdev_pci.h
> index 6565ae7d3..603287c28 100644
> --- a/lib/librte_ether/rte_ethdev_pci.h
> +++ b/lib/librte_ether/rte_ethdev_pci.h
> @@ -70,6 +70,18 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
> 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 = bus_device;
> +
> + if (!pci_dev)
> + return -ENODEV;
> +
> + rte_eth_copy_pci_info(eth_dev, pci_dev);
> +
> + return 0;
> +}
> +
> /**
> * @internal
> * Allocates a new ethdev slot for an ethernet device and returns the pointer
> diff --git a/lib/librte_ether/rte_ethdev_version.map
> b/lib/librte_ether/rte_ethdev_version.map
> index 34df6c8b5..bd7232923 100644
> --- a/lib/librte_ether/rte_ethdev_version.map
> +++ b/lib/librte_ether/rte_ethdev_version.map
> @@ -229,3 +229,11 @@ EXPERIMENTAL {
> rte_mtr_stats_update;
>
> } DPDK_17.11;
> +
> +EXPERIMENTAL {
> + global:
> +
> + rte_eth_dev_create;
> + rte_eth_dev_destroy;
> +
> +} DPDK_18.05;
> --
> 2.14.3
