ceph/src/seastar/dpdk/lib/librte_ether/rte_ethdev_pci.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2017 Brocade Communications Systems, Inc.
   5  *   Author: Jan Blunck <jblunck@infradead.org>
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of the copyright holder nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _RTE_ETHDEV_PCI_H_
  35 #define _RTE_ETHDEV_PCI_H_
  36
  37 #include <rte_malloc.h>
  38 #include <rte_pci.h>
  39 #include <rte_ethdev.h>
  40
  41 /**
  42  * Copy pci device info to the Ethernet device data.
  43  *
  44  * @param eth_dev
  45  * The *eth_dev* pointer is the address of the *rte_eth_dev* structure.
  46  * @param pci_dev
  47  * The *pci_dev* pointer is the address of the *rte_pci_device* structure.
  48  *
  49  * @return
  50  *   - 0 on success, negative on error
  51  */
  52 static inline void
  53 rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
  54         struct rte_pci_device *pci_dev)
  55 {
  56         if ((eth_dev == NULL) || (pci_dev == NULL)) {
  57                 RTE_PMD_DEBUG_TRACE("NULL pointer eth_dev=%p pci_dev=%p\n",
  58                                 eth_dev, pci_dev);
  59                 return;
  60         }
  61
  62         eth_dev->intr_handle = &pci_dev->intr_handle;
  63
  64         eth_dev->data->dev_flags = 0;
  65         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
  66                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
  67         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
  68                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
  69
  70         eth_dev->data->kdrv = pci_dev->kdrv;
  71         eth_dev->data->numa_node = pci_dev->device.numa_node;
  72         eth_dev->data->drv_name = pci_dev->driver->driver.name;
  73 }
  74
  75 /**
  76  * @internal
  77  * Allocates a new ethdev slot for an ethernet device and returns the pointer
  78  * to that slot for the driver to use.
  79  *
  80  * @param dev
  81  *      Pointer to the PCI device
  82  *
  83  * @param private_data_size
  84  *      Size of private data structure
  85  *
  86  * @return
  87  *      A pointer to a rte_eth_dev or NULL if allocation failed.
  88  */
  89 static inline struct rte_eth_dev *
  90 rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
  91 {
  92         struct rte_eth_dev *eth_dev;
  93         const char *name;
  94
  95         if (!dev)
  96                 return NULL;
  97
  98         name = dev->device.name;
  99
 100         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 101                 eth_dev = rte_eth_dev_allocate(name);
 102                 if (!eth_dev)
 103                         return NULL;
 104
 105                 if (private_data_size) {
 106                         eth_dev->data->dev_private = rte_zmalloc_socket(name,
 107                                 private_data_size, RTE_CACHE_LINE_SIZE,
 108                                 dev->device.numa_node);
 109                         if (!eth_dev->data->dev_private) {
 110                                 rte_eth_dev_release_port(eth_dev);
 111                                 return NULL;
 112                         }
 113                 }
 114         } else {
 115                 eth_dev = rte_eth_dev_attach_secondary(name);
 116                 if (!eth_dev)
 117                         return NULL;
 118         }
 119
 120         eth_dev->device = &dev->device;
 121         eth_dev->intr_handle = &dev->intr_handle;
 122         rte_eth_copy_pci_info(eth_dev, dev);
 123         return eth_dev;
 124 }
 125
 126 static inline void
 127 rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
 128 {
 129         /* free ether device */
 130         rte_eth_dev_release_port(eth_dev);
 131
 132         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
 133                 rte_free(eth_dev->data->dev_private);
 134
 135         eth_dev->data->dev_private = NULL;
 136
 137         eth_dev->device = NULL;
 138         eth_dev->intr_handle = NULL;
 139 }
 140
 141 typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);
 142
 143 /**
 144  * @internal
 145  * Wrapper for use by pci drivers in a .probe function to attach to a ethdev
 146  * interface.
 147  */
 148 static inline int
 149 rte_eth_dev_pci_generic_probe(struct rte_pci_device *pci_dev,
 150         size_t private_data_size, eth_dev_pci_callback_t dev_init)
 151 {
 152         struct rte_eth_dev *eth_dev;
 153         int ret;
 154
 155         eth_dev = rte_eth_dev_pci_allocate(pci_dev, private_data_size);
 156         if (!eth_dev)
 157                 return -ENOMEM;
 158
 159         RTE_FUNC_PTR_OR_ERR_RET(*dev_init, -EINVAL);
 160         ret = dev_init(eth_dev);
 161         if (ret)
 162                 rte_eth_dev_pci_release(eth_dev);
 163
 164         return ret;
 165 }
 166
 167 /**
 168  * @internal
 169  * Wrapper for use by pci drivers in a .remove function to detach a ethdev
 170  * interface.
 171  */
 172 static inline int
 173 rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
 174         eth_dev_pci_callback_t dev_uninit)
 175 {
 176         struct rte_eth_dev *eth_dev;
 177         int ret;
 178
 179         eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
 180         if (!eth_dev)
 181                 return -ENODEV;
 182
 183         if (dev_uninit) {
 184                 ret = dev_uninit(eth_dev);
 185                 if (ret)
 186                         return ret;
 187         }
 188
 189         rte_eth_dev_pci_release(eth_dev);
 190         return 0;
 191 }
 192
 193 #endif /* _RTE_ETHDEV_PCI_H_ */