lib/eventdev/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 #include <string.h>
  17
  18 #include <rte_config.h>
  19 #include <rte_eal.h>
  20 #include <rte_lcore.h>
  21 #include <rte_pci.h>
  22 #include <rte_bus_pci.h>
  23
  24 #include "eventdev_pmd.h"
  25
  26 typedef int (*eventdev_pmd_pci_callback_t)(struct rte_eventdev *dev);
  27
  28 /**
  29  * @internal
  30  * Wrapper for use by pci drivers as a .probe function to attach to an event
  31  * interface.  Same as rte_event_pmd_pci_probe, except caller can specify
  32  * the name.
  33  */
  34 __rte_internal
  35 static inline int
  36 rte_event_pmd_pci_probe_named(struct rte_pci_driver *pci_drv,
  37                               struct rte_pci_device *pci_dev,
  38                               size_t private_data_size,
  39                               eventdev_pmd_pci_callback_t devinit,
  40                               const char *name)
  41 {
  42         struct rte_eventdev *eventdev;
  43         int retval;
  44
  45         if (devinit == NULL)
  46                 return -EINVAL;
  47
  48         eventdev = rte_event_pmd_allocate(name,
  49                          pci_dev->device.numa_node);
  50         if (eventdev == NULL)
  51                 return -ENOMEM;
  52
  53         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
  54                 eventdev->data->dev_private =
  55                                 rte_zmalloc_socket(
  56                                                 "eventdev private structure",
  57                                                 private_data_size,
  58                                                 RTE_CACHE_LINE_SIZE,
  59                                                 rte_socket_id());
  60
  61                 if (eventdev->data->dev_private == NULL)
  62                         rte_panic("Cannot allocate memzone for private "
  63                                         "device data");
  64         }
  65
  66         eventdev->dev = &pci_dev->device;
  67
  68         /* Invoke PMD device initialization function */
  69         retval = devinit(eventdev);
  70         if (retval == 0)
  71                 return 0;
  72
  73         RTE_EDEV_LOG_ERR("driver %s: (vendor_id=0x%x device_id=0x%x)"
  74                         " failed", pci_drv->driver.name,
  75                         (unsigned int) pci_dev->id.vendor_id,
  76                         (unsigned int) pci_dev->id.device_id);
  77
  78         rte_event_pmd_release(eventdev);
  79
  80         return -ENXIO;
  81 }
  82
  83 /**
  84  * @internal
  85  * Wrapper for use by pci drivers as a .probe function to attach to a event
  86  * interface.
  87  */
  88 __rte_internal
  89 static inline int
  90 rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
  91                             struct rte_pci_device *pci_dev,
  92                             size_t private_data_size,
  93                             eventdev_pmd_pci_callback_t devinit)
  94 {
  95         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
  96
  97         rte_pci_device_name(&pci_dev->addr, eventdev_name,
  98                         sizeof(eventdev_name));
  99
 100         return rte_event_pmd_pci_probe_named(pci_drv,
 101                                              pci_dev,
 102                                              private_data_size,
 103                                              devinit,
 104                                              eventdev_name);
 105 }
 106
 107 /**
 108  * @internal
 109  * Wrapper for use by pci drivers as a .remove function to detach a event
 110  * interface.
 111  */
 112 __rte_internal
 113 static inline int
 114 rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
 115                              eventdev_pmd_pci_callback_t devuninit)
 116 {
 117         struct rte_eventdev *eventdev;
 118         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 119         int ret = 0;
 120
 121         if (pci_dev == NULL)
 122                 return -EINVAL;
 123
 124         rte_pci_device_name(&pci_dev->addr, eventdev_name,
 125                         sizeof(eventdev_name));
 126
 127         eventdev = rte_event_pmd_get_named_dev(eventdev_name);
 128         if (eventdev == NULL)
 129                 return -ENODEV;
 130
 131         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 132                 ret = rte_event_dev_close(eventdev->data->dev_id);
 133                 if (ret < 0)
 134                         return ret;
 135         }
 136
 137         /* Invoke PMD device un-init function */
 138         if (devuninit)
 139                 ret = devuninit(eventdev);
 140         if (ret)
 141                 return ret;
 142
 143         /* Free event device */
 144         rte_event_pmd_release(eventdev);
 145
 146         eventdev->dev = NULL;
 147
 148         return 0;
 149 }
 150
 151 #endif /* _RTE_EVENTDEV_PMD_PCI_H_ */