ceph/src/seastar/dpdk/lib/librte_eventdev/rte_eventdev_pmd_pci.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2017 Cavium, Inc
   3  */
   4
   5 #ifndef _RTE_EVENTDEV_PMD_PCI_H_
   6 #define _RTE_EVENTDEV_PMD_PCI_H_
   7
   8 /** @file
   9  * RTE Eventdev PCI PMD APIs
  10  *
  11  * @note
  12  * These API are from event PCI PMD only and user applications should not call
  13  * them directly.
  14  */
  15
  16
  17 #ifdef __cplusplus
  18 extern "C" {
  19 #endif
  20
  21 #include <string.h>
  22
  23 #include <rte_config.h>
  24 #include <rte_eal.h>
  25 #include <rte_lcore.h>
  26 #include <rte_pci.h>
  27 #include <rte_bus_pci.h>
  28
  29 #include "rte_eventdev_pmd.h"
  30
  31 typedef int (*eventdev_pmd_pci_callback_t)(struct rte_eventdev *dev);
  32
  33 /**
  34  * @internal
  35  * Wrapper for use by pci drivers as a .probe function to attach to a event
  36  * interface.
  37  */
  38 static inline int
  39 rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
  40                             struct rte_pci_device *pci_dev,
  41                             size_t private_data_size,
  42                             eventdev_pmd_pci_callback_t devinit)
  43 {
  44         struct rte_eventdev *eventdev;
  45
  46         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
  47
  48         int retval;
  49
  50         if (devinit == NULL)
  51                 return -EINVAL;
  52
  53         rte_pci_device_name(&pci_dev->addr, eventdev_name,
  54                         sizeof(eventdev_name));
  55
  56         eventdev = rte_event_pmd_allocate(eventdev_name,
  57                          pci_dev->device.numa_node);
  58         if (eventdev == NULL)
  59                 return -ENOMEM;
  60
  61         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
  62                 eventdev->data->dev_private =
  63                                 rte_zmalloc_socket(
  64                                                 "eventdev private structure",
  65                                                 private_data_size,
  66                                                 RTE_CACHE_LINE_SIZE,
  67                                                 rte_socket_id());
  68
  69                 if (eventdev->data->dev_private == NULL)
  70                         rte_panic("Cannot allocate memzone for private "
  71                                         "device data");
  72         }
  73
  74         eventdev->dev = &pci_dev->device;
  75
  76         /* Invoke PMD device initialization function */
  77         retval = devinit(eventdev);
  78         if (retval == 0)
  79                 return 0;
  80
  81         RTE_EDEV_LOG_ERR("driver %s: (vendor_id=0x%x device_id=0x%x)"
  82                         " failed", pci_drv->driver.name,
  83                         (unsigned int) pci_dev->id.vendor_id,
  84                         (unsigned int) pci_dev->id.device_id);
  85
  86         rte_event_pmd_release(eventdev);
  87
  88         return -ENXIO;
  89 }
  90
  91
  92 /**
  93  * @internal
  94  * Wrapper for use by pci drivers as a .remove function to detach a event
  95  * interface.
  96  */
  97 static inline int
  98 rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
  99                              eventdev_pmd_pci_callback_t devuninit)
 100 {
 101         struct rte_eventdev *eventdev;
 102         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 103         int ret = 0;
 104
 105         if (pci_dev == NULL)
 106                 return -EINVAL;
 107
 108         rte_pci_device_name(&pci_dev->addr, eventdev_name,
 109                         sizeof(eventdev_name));
 110
 111         eventdev = rte_event_pmd_get_named_dev(eventdev_name);
 112         if (eventdev == NULL)
 113                 return -ENODEV;
 114
 115         ret = rte_event_dev_close(eventdev->data->dev_id);
 116         if (ret < 0)
 117                 return ret;
 118
 119         /* Invoke PMD device un-init function */
 120         if (devuninit)
 121                 ret = devuninit(eventdev);
 122         if (ret)
 123                 return ret;
 124
 125         /* Free event device */
 126         rte_event_pmd_release(eventdev);
 127
 128         eventdev->dev = NULL;
 129
 130         return 0;
 131 }
 132
 133 #ifdef __cplusplus
 134 }
 135 #endif
 136
 137 #endif /* _RTE_EVENTDEV_PMD_PCI_H_ */