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/*-
* BSD LICENSE
*
* Copyright(c) 2017 Brocade Communications Systems, Inc.
* Author: Jan Blunck <jblunck@infradead.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_ETHDEV_PCI_H_
#define _RTE_ETHDEV_PCI_H_
#include <rte_malloc.h>
#include <rte_pci.h>
#include <rte_bus_pci.h>
#include <rte_config.h>
#include <rte_ethdev.h>
/**
* Copy pci device info to the Ethernet device data.
*
* @param eth_dev
* The *eth_dev* pointer is the address of the *rte_eth_dev* structure.
* @param pci_dev
* The *pci_dev* pointer is the address of the *rte_pci_device* structure.
*/
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_PMD_DEBUG_TRACE("NULL pointer eth_dev=%p pci_dev=%p\n",
eth_dev, pci_dev);
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;
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;
}
/**
* @internal
* Allocates a new ethdev slot for an ethernet device and returns the pointer
* to that slot for the driver to use.
*
* @param dev
* Pointer to the PCI device
*
* @param private_data_size
* Size of private data structure
*
* @return
* A pointer to a rte_eth_dev or NULL if allocation failed.
*/
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)
{
if (rte_eal_process_type() == RTE_PROC_PRIMARY)
rte_free(eth_dev->data->dev_private);
eth_dev->data->dev_private = NULL;
/*
* Secondary process will check the name to attach.
* Clear this field to avoid attaching a released ports.
*/
eth_dev->data->name[0] = '\0';
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);
/**
* @internal
* Wrapper for use by pci drivers in a .probe function to attach to a ethdev
* interface.
*/
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);
return ret;
}
/**
* @internal
* Wrapper for use by pci drivers in a .remove function to detach a ethdev
* interface.
*/
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 -ENODEV;
if (dev_uninit) {
ret = dev_uninit(eth_dev);
if (ret)
return ret;
}
rte_eth_dev_pci_release(eth_dev);
return 0;
}
#endif /* _RTE_ETHDEV_PCI_H_ */
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