ethdev: add PCI driver helpers
This adds the following helper intended to be used by rte_pci_driver implementations working with ethdev: - rte_eth_dev_pci_allocate - rte_eth_dev_pci_release - rte_eth_dev_pci_generic_probe - rte_eth_dev_pci_generic_remove Signed-off-by: Jan Blunck <jblunck@infradead.org> Acked-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Jan Blunck
Thomas Monjalon
parent
050fe6e9ff
commit
dcd5c8112b
@ -50,6 +50,7 @@ SRCS-y += rte_flow.c
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# Export include files
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#
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SYMLINK-y-include += rte_ethdev.h
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SYMLINK-y-include += rte_ethdev_pci.h
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SYMLINK-y-include += rte_ethdev_vdev.h
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SYMLINK-y-include += rte_eth_ctrl.h
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SYMLINK-y-include += rte_dev_info.h
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151
lib/librte_ether/rte_ethdev_pci.h
Normal file
151
lib/librte_ether/rte_ethdev_pci.h
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@ -0,0 +1,151 @@
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/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 Brocade Communications Systems, Inc.
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* Author: Jan Blunck <jblunck@infradead.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_ETHDEV_PCI_H_
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#define _RTE_ETHDEV_PCI_H_
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#include <rte_malloc.h>
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#include <rte_pci.h>
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#include <rte_ethdev.h>
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/**
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* @internal
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* Allocates a new ethdev slot for an ethernet device and returns the pointer
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* to that slot for the driver to use.
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*
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* @param dev
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* Pointer to the PCI device
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*
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* @param private_data_size
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* Size of private data structure
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*
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* @return
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* A pointer to a rte_eth_dev or NULL if allocation failed.
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*/
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static inline struct rte_eth_dev *
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rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
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{
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struct rte_eth_dev *eth_dev;
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const char *name;
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if (!dev)
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return NULL;
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name = dev->device.name;
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if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
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eth_dev = rte_eth_dev_allocate(name);
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if (!eth_dev)
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return NULL;
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if (private_data_size) {
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eth_dev->data->dev_private = rte_zmalloc_socket(name,
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private_data_size, RTE_CACHE_LINE_SIZE,
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dev->device.numa_node);
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if (!eth_dev->data->dev_private) {
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rte_eth_dev_release_port(eth_dev);
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return NULL;
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}
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}
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} else {
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eth_dev = rte_eth_dev_attach_secondary(name);
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if (!eth_dev)
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return NULL;
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}
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eth_dev->device = &dev->device;
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eth_dev->driver = NULL;
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eth_dev->intr_handle = &dev->intr_handle;
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rte_eth_copy_pci_info(eth_dev, dev);
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return eth_dev;
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}
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static inline void
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rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
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{
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/* free ether device */
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rte_eth_dev_release_port(eth_dev);
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if (rte_eal_process_type() == RTE_PROC_PRIMARY)
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rte_free(eth_dev->data->dev_private);
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eth_dev->data->dev_private = NULL;
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eth_dev->device = NULL;
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eth_dev->driver = NULL;
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eth_dev->intr_handle = NULL;
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}
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typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);
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static inline int
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rte_eth_dev_pci_generic_probe(struct rte_pci_device *pci_dev,
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size_t private_data_size, eth_dev_pci_callback_t dev_init)
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{
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struct rte_eth_dev *eth_dev;
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int ret;
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eth_dev = rte_eth_dev_pci_allocate(pci_dev, private_data_size);
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if (!eth_dev)
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return -ENOMEM;
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RTE_FUNC_PTR_OR_ERR_RET(*dev_init, -EINVAL);
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ret = dev_init(eth_dev);
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if (ret)
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rte_eth_dev_pci_release(eth_dev);
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return ret;
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}
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static inline int
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rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
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eth_dev_pci_callback_t dev_uninit)
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{
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struct rte_eth_dev *eth_dev;
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int ret;
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eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
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if (!eth_dev)
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return -ENODEV;
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if (dev_uninit) {
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ret = dev_uninit(eth_dev);
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if (ret)
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return ret;
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}
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rte_eth_dev_pci_release(eth_dev);
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return 0;
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}
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#endif /* _RTE_ETHDEV_PCI_H_ */
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