LXR dpdk/lib/eventdev/eventdev_pmd

   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
   9extern "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_compat.h>
  23#include <rte_config.h>
  24#include <rte_eal.h>
  25#include <rte_lcore.h>
  26#include <rte_pci.h>
  27#include <bus_pci_driver.h>
  28
  29#include "eventdev_pmd.h"
  30
  31typedef 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 an event
  36 * interface.  Same as rte_event_pmd_pci_probe, except caller can specify
  37 * the name.
  38 */
  39__rte_internal
  40static inline int
  41rte_event_pmd_pci_probe_named(struct rte_pci_driver *pci_drv,
  42                              struct rte_pci_device *pci_dev,
  43                              size_t private_data_size,
  44                              eventdev_pmd_pci_callback_t devinit,
  45                              const char *name)
  46{
  47        struct rte_eventdev *eventdev;
  48        int retval;
  49
  50        if (devinit == NULL)
  51                return -EINVAL;
  52
  53        eventdev = rte_event_pmd_allocate(name,
  54                         pci_dev->device.numa_node);
  55        if (eventdev == NULL)
  56                return -ENOMEM;
  57
  58        if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
  59                eventdev->data->dev_private =
  60                                rte_zmalloc_socket(
  61                                                "eventdev private structure",
  62                                                private_data_size,
  63                                                RTE_CACHE_LINE_SIZE,
  64                                                rte_socket_id());
  65
  66                if (eventdev->data->dev_private == NULL)
  67                        rte_panic("Cannot allocate memzone for private "
  68                                        "device data");
  69        }
  70
  71        eventdev->dev = &pci_dev->device;
  72
  73        /* Invoke PMD device initialization function */
  74        retval = devinit(eventdev);
  75        if (retval == 0) {
  76                event_dev_probing_finish(eventdev);
  77                return 0;
  78        }
  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 * @internal
  92 * Wrapper for use by pci drivers as a .probe function to attach to a event
  93 * interface.
  94 */
  95__rte_internal
  96static inline int
  97rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
  98                            struct rte_pci_device *pci_dev,
  99                            size_t private_data_size,
 100                            eventdev_pmd_pci_callback_t devinit)
 101{
 102        char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 103
 104        rte_pci_device_name(&pci_dev->addr, eventdev_name,
 105                        sizeof(eventdev_name));
 106
 107        return rte_event_pmd_pci_probe_named(pci_drv,
 108                                             pci_dev,
 109                                             private_data_size,
 110                                             devinit,
 111                                             eventdev_name);
 112}
 113
 114/**
 115 * @internal
 116 * Wrapper for use by pci drivers as a .remove function to detach a event
 117 * interface.
 118 */
 119__rte_internal
 120static inline int
 121rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
 122                             eventdev_pmd_pci_callback_t devuninit)
 123{
 124        struct rte_eventdev *eventdev;
 125        char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 126        int ret = 0;
 127
 128        if (pci_dev == NULL)
 129                return -EINVAL;
 130
 131        rte_pci_device_name(&pci_dev->addr, eventdev_name,
 132                        sizeof(eventdev_name));
 133
 134        eventdev = rte_event_pmd_get_named_dev(eventdev_name);
 135        if (eventdev == NULL)
 136                return -ENODEV;
 137
 138        if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 139                ret = rte_event_dev_close(eventdev->data->dev_id);
 140                if (ret < 0)
 141                        return ret;
 142        }
 143
 144        /* Invoke PMD device un-init function */
 145        if (devuninit)
 146                ret = devuninit(eventdev);
 147        if (ret)
 148                return ret;
 149
 150        /* Free event device */
 151        rte_event_pmd_release(eventdev);
 152
 153        eventdev->dev = NULL;
 154
 155        return 0;
 156}
 157
 158#ifdef __cplusplus
 159}
 160#endif
 161
 162#endif /* _RTE_EVENTDEV_PMD_PCI_H_ */
 163