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_eal.h>
  24 #include <rte_lcore.h>
  25 #include <rte_pci.h>
  26 #include <rte_bus_pci.h>
  27
  28 #include "rte_eventdev_pmd.h"
  29
  30 typedef int (*eventdev_pmd_pci_callback_t)(struct rte_eventdev *dev);
  31
  32 /**
  33  * @internal
  34  * Wrapper for use by pci drivers as a .probe function to attach to a event
  35  * interface.
  36  */
  37 static inline int
  38 rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
  39                             struct rte_pci_device *pci_dev,
  40                             size_t private_data_size,
  41                             eventdev_pmd_pci_callback_t devinit)
  42 {
  43         struct rte_eventdev *eventdev;
  44
  45         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
  46
  47         int retval;
  48
  49         if (devinit == NULL)
  50                 return -EINVAL;
  51
  52         rte_pci_device_name(&pci_dev->addr, eventdev_name,
  53                         sizeof(eventdev_name));
  54
  55         eventdev = rte_event_pmd_allocate(eventdev_name,
  56                          pci_dev->device.numa_node);
  57         if (eventdev == NULL)
  58                 return -ENOMEM;
  59
  60         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
  61                 eventdev->data->dev_private =
  62                                 rte_zmalloc_socket(
  63                                                 "eventdev private structure",
  64                                                 private_data_size,
  65                                                 RTE_CACHE_LINE_SIZE,
  66                                                 rte_socket_id());
  67
  68                 if (eventdev->data->dev_private == NULL)
  69                         rte_panic("Cannot allocate memzone for private "
  70                                         "device data");
  71         }
  72
  73         eventdev->dev = &pci_dev->device;
  74
  75         /* Invoke PMD device initialization function */
  76         retval = devinit(eventdev);
  77         if (retval == 0)
  78                 return 0;
  79
  80         RTE_EDEV_LOG_ERR("driver %s: (vendor_id=0x%x device_id=0x%x)"
  81                         " failed", pci_drv->driver.name,
  82                         (unsigned int) pci_dev->id.vendor_id,
  83                         (unsigned int) pci_dev->id.device_id);
  84
  85         rte_event_pmd_release(eventdev);
  86
  87         return -ENXIO;
  88 }
  89
  90
  91 /**
  92  * @internal
  93  * Wrapper for use by pci drivers as a .remove function to detach a event
  94  * interface.
  95  */
  96 static inline int
  97 rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
  98                              eventdev_pmd_pci_callback_t devuninit)
  99 {
 100         struct rte_eventdev *eventdev;
 101         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 102         int ret = 0;
 103
 104         if (pci_dev == NULL)
 105                 return -EINVAL;
 106
 107         rte_pci_device_name(&pci_dev->addr, eventdev_name,
 108                         sizeof(eventdev_name));
 109
 110         eventdev = rte_event_pmd_get_named_dev(eventdev_name);
 111         if (eventdev == NULL)
 112                 return -ENODEV;
 113
 114         ret = rte_event_dev_close(eventdev->data->dev_id);
 115         if (ret < 0)
 116                 return ret;
 117
 118         /* Invoke PMD device un-init function */
 119         if (devuninit)
 120                 ret = devuninit(eventdev);
 121         if (ret)
 122                 return ret;
 123
 124         /* Free event device */
 125         rte_event_pmd_release(eventdev);
 126
 127         eventdev->dev = NULL;
 128
 129         return 0;
 130 }
 131
 132 #ifdef __cplusplus
 133 }
 134 #endif
 135
 136 #endif /* _RTE_EVENTDEV_PMD_PCI_H_ */