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 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11
  12 /** @file
  13  * RTE Eventdev PCI PMD APIs
  14  *
  15  * @note
  16  * These API are from event PCI PMD only and user applications should not call
  17  * them directly.
  18  */
  19
  20 #include <string.h>
  21
  22 #include <rte_config.h>
  23 #include <rte_eal.h>
  24 #include <rte_lcore.h>
  25 #include <rte_pci.h>
  26 #include <rte_bus_pci.h>
  27
  28 #include "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 an event
  35  * interface.  Same as rte_event_pmd_pci_probe, except caller can specify
  36  * the name.
  37  */
  38 __rte_internal
  39 static inline int
  40 rte_event_pmd_pci_probe_named(struct rte_pci_driver *pci_drv,
  41                               struct rte_pci_device *pci_dev,
  42                               size_t private_data_size,
  43                               eventdev_pmd_pci_callback_t devinit,
  44                               const char *name)
  45 {
  46         struct rte_eventdev *eventdev;
  47         int retval;
  48
  49         if (devinit == NULL)
  50                 return -EINVAL;
  51
  52         eventdev = rte_event_pmd_allocate(name,
  53                          pci_dev->device.numa_node);
  54         if (eventdev == NULL)
  55                 return -ENOMEM;
  56
  57         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
  58                 eventdev->data->dev_private =
  59                                 rte_zmalloc_socket(
  60                                                 "eventdev private structure",
  61                                                 private_data_size,
  62                                                 RTE_CACHE_LINE_SIZE,
  63                                                 rte_socket_id());
  64
  65                 if (eventdev->data->dev_private == NULL)
  66                         rte_panic("Cannot allocate memzone for private "
  67                                         "device data");
  68         }
  69
  70         eventdev->dev = &pci_dev->device;
  71
  72         /* Invoke PMD device initialization function */
  73         retval = devinit(eventdev);
  74         if (retval == 0) {
  75                 event_dev_probing_finish(eventdev);
  76                 return 0;
  77         }
  78
  79         RTE_EDEV_LOG_ERR("driver %s: (vendor_id=0x%x device_id=0x%x)"
  80                         " failed", pci_drv->driver.name,
  81                         (unsigned int) pci_dev->id.vendor_id,
  82                         (unsigned int) pci_dev->id.device_id);
  83
  84         rte_event_pmd_release(eventdev);
  85
  86         return -ENXIO;
  87 }
  88
  89 /**
  90  * @internal
  91  * Wrapper for use by pci drivers as a .probe function to attach to a event
  92  * interface.
  93  */
  94 __rte_internal
  95 static inline int
  96 rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
  97                             struct rte_pci_device *pci_dev,
  98                             size_t private_data_size,
  99                             eventdev_pmd_pci_callback_t devinit)
 100 {
 101         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 102
 103         rte_pci_device_name(&pci_dev->addr, eventdev_name,
 104                         sizeof(eventdev_name));
 105
 106         return rte_event_pmd_pci_probe_named(pci_drv,
 107                                              pci_dev,
 108                                              private_data_size,
 109                                              devinit,
 110                                              eventdev_name);
 111 }
 112
 113 /**
 114  * @internal
 115  * Wrapper for use by pci drivers as a .remove function to detach a event
 116  * interface.
 117  */
 118 __rte_internal
 119 static inline int
 120 rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
 121                              eventdev_pmd_pci_callback_t devuninit)
 122 {
 123         struct rte_eventdev *eventdev;
 124         char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 125         int ret = 0;
 126
 127         if (pci_dev == NULL)
 128                 return -EINVAL;
 129
 130         rte_pci_device_name(&pci_dev->addr, eventdev_name,
 131                         sizeof(eventdev_name));
 132
 133         eventdev = rte_event_pmd_get_named_dev(eventdev_name);
 134         if (eventdev == NULL)
 135                 return -ENODEV;
 136
 137         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 138                 ret = rte_event_dev_close(eventdev->data->dev_id);
 139                 if (ret < 0)
 140                         return ret;
 141         }
 142
 143         /* Invoke PMD device un-init function */
 144         if (devuninit)
 145                 ret = devuninit(eventdev);
 146         if (ret)
 147                 return ret;
 148
 149         /* Free event device */
 150         rte_event_pmd_release(eventdev);
 151
 152         eventdev->dev = NULL;
 153
 154         return 0;
 155 }
 156
 157 #ifdef __cplusplus
 158 }
 159 #endif
 160
 161 #endif /* _RTE_EVENTDEV_PMD_PCI_H_ */