lib/eal/windows/eal_interrupts.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2020 Mellanox Technologies, Ltd
   3  */
   4
   5 #include <rte_interrupts.h>
   6
   7 #include "eal_private.h"
   8 #include "eal_windows.h"
   9
  10 static pthread_t intr_thread;
  11
  12 static HANDLE intr_iocp;
  13
  14 static void
  15 eal_intr_process(const OVERLAPPED_ENTRY *event)
  16 {
  17         RTE_SET_USED(event);
  18 }
  19
  20 static void *
  21 eal_intr_thread_main(LPVOID arg __rte_unused)
  22 {
  23         while (1) {
  24                 OVERLAPPED_ENTRY events[16];
  25                 ULONG event_count, i;
  26                 BOOL result;
  27
  28                 result = GetQueuedCompletionStatusEx(
  29                         intr_iocp, events, RTE_DIM(events), &event_count,
  30                         INFINITE, /* no timeout */
  31                         TRUE);    /* alertable wait for alarm APCs */
  32
  33                 if (!result) {
  34                         DWORD error = GetLastError();
  35                         if (error != WAIT_IO_COMPLETION) {
  36                                 RTE_LOG_WIN32_ERR("GetQueuedCompletionStatusEx()");
  37                                 RTE_LOG(ERR, EAL, "Failed waiting for interrupts\n");
  38                                 break;
  39                         }
  40
  41                         /* No I/O events, all work is done in completed APCs. */
  42                         continue;
  43                 }
  44
  45                 for (i = 0; i < event_count; i++)
  46                         eal_intr_process(&events[i]);
  47         }
  48
  49         intr_thread = 0;
  50
  51         CloseHandle(intr_iocp);
  52         intr_iocp = NULL;
  53
  54         return NULL;
  55 }
  56
  57 int
  58 rte_eal_intr_init(void)
  59 {
  60         int ret = 0;
  61
  62         intr_iocp = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 1);
  63         if (intr_iocp == NULL) {
  64                 RTE_LOG_WIN32_ERR("CreateIoCompletionPort()");
  65                 RTE_LOG(ERR, EAL, "Cannot create interrupt IOCP\n");
  66                 return -1;
  67         }
  68
  69         ret = rte_ctrl_thread_create(&intr_thread, "eal-intr-thread", NULL,
  70                         eal_intr_thread_main, NULL);
  71         if (ret != 0) {
  72                 rte_errno = -ret;
  73                 RTE_LOG(ERR, EAL, "Cannot create interrupt thread\n");
  74         }
  75
  76         return ret;
  77 }
  78
  79 int
  80 rte_thread_is_intr(void)
  81 {
  82         return pthread_equal(intr_thread, pthread_self());
  83 }
  84
  85 int
  86 rte_intr_rx_ctl(__rte_unused struct rte_intr_handle *intr_handle,
  87                 __rte_unused int epfd, __rte_unused int op,
  88                 __rte_unused unsigned int vec, __rte_unused void *data)
  89 {
  90         return -ENOTSUP;
  91 }
  92
  93 int
  94 eal_intr_thread_schedule(void (*func)(void *arg), void *arg)
  95 {
  96         HANDLE handle;
  97
  98         handle = OpenThread(THREAD_ALL_ACCESS, FALSE, intr_thread);
  99         if (handle == NULL) {
 100                 RTE_LOG_WIN32_ERR("OpenThread(%llu)", intr_thread);
 101                 return -ENOENT;
 102         }
 103
 104         if (!QueueUserAPC((PAPCFUNC)(ULONG_PTR)func, handle, (ULONG_PTR)arg)) {
 105                 RTE_LOG_WIN32_ERR("QueueUserAPC()");
 106                 return -EINVAL;
 107         }
 108
 109         return 0;
 110 }
 111
 112 int
 113 rte_intr_callback_register(
 114         __rte_unused const struct rte_intr_handle *intr_handle,
 115         __rte_unused rte_intr_callback_fn cb, __rte_unused void *cb_arg)
 116 {
 117         return -ENOTSUP;
 118 }
 119
 120 int
 121 rte_intr_callback_unregister_pending(
 122         __rte_unused const struct rte_intr_handle *intr_handle,
 123         __rte_unused rte_intr_callback_fn cb_fn, __rte_unused void *cb_arg,
 124         __rte_unused rte_intr_unregister_callback_fn ucb_fn)
 125 {
 126         return -ENOTSUP;
 127 }
 128
 129 int
 130 rte_intr_callback_unregister(
 131         __rte_unused const struct rte_intr_handle *intr_handle,
 132         __rte_unused rte_intr_callback_fn cb_fn, __rte_unused void *cb_arg)
 133 {
 134         return 0;
 135 }
 136
 137 int
 138 rte_intr_callback_unregister_sync(
 139         __rte_unused const struct rte_intr_handle *intr_handle,
 140         __rte_unused rte_intr_callback_fn cb_fn, __rte_unused void *cb_arg)
 141 {
 142         return 0;
 143 }
 144
 145 int
 146 rte_intr_enable(__rte_unused const struct rte_intr_handle *intr_handle)
 147 {
 148         return -ENOTSUP;
 149 }
 150
 151 int
 152 rte_intr_ack(__rte_unused const struct rte_intr_handle *intr_handle)
 153 {
 154         return -ENOTSUP;
 155 }
 156
 157 int
 158 rte_intr_disable(__rte_unused const struct rte_intr_handle *intr_handle)
 159 {
 160         return -ENOTSUP;
 161 }
 162
 163 int
 164 rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd)
 165 {
 166         RTE_SET_USED(intr_handle);
 167         RTE_SET_USED(nb_efd);
 168
 169         return 0;
 170 }
 171
 172 void
 173 rte_intr_efd_disable(struct rte_intr_handle *intr_handle)
 174 {
 175         RTE_SET_USED(intr_handle);
 176 }
 177
 178 int
 179 rte_intr_dp_is_en(struct rte_intr_handle *intr_handle)
 180 {
 181         RTE_SET_USED(intr_handle);
 182
 183         return 0;
 184 }
 185
 186 int
 187 rte_intr_allow_others(struct rte_intr_handle *intr_handle)
 188 {
 189         RTE_SET_USED(intr_handle);
 190
 191         return 1;
 192 }
 193
 194 int
 195 rte_intr_cap_multiple(struct rte_intr_handle *intr_handle)
 196 {
 197         RTE_SET_USED(intr_handle);
 198
 199         return 0;
 200 }
 201
 202 int
 203 rte_epoll_wait(int epfd, struct rte_epoll_event *events,
 204                 int maxevents, int timeout)
 205 {
 206         RTE_SET_USED(epfd);
 207         RTE_SET_USED(events);
 208         RTE_SET_USED(maxevents);
 209         RTE_SET_USED(timeout);
 210
 211         return -ENOTSUP;
 212 }
 213
 214 int
 215 rte_epoll_wait_interruptible(int epfd, struct rte_epoll_event *events,
 216                              int maxevents, int timeout)
 217 {
 218         RTE_SET_USED(epfd);
 219         RTE_SET_USED(events);
 220         RTE_SET_USED(maxevents);
 221         RTE_SET_USED(timeout);
 222
 223         return -ENOTSUP;
 224 }
 225
 226 int
 227 rte_epoll_ctl(int epfd, int op, int fd, struct rte_epoll_event *event)
 228 {
 229         RTE_SET_USED(epfd);
 230         RTE_SET_USED(op);
 231         RTE_SET_USED(fd);
 232         RTE_SET_USED(event);
 233
 234         return -ENOTSUP;
 235 }
 236
 237 int
 238 rte_intr_tls_epfd(void)
 239 {
 240         return -ENOTSUP;
 241 }
 242
 243 void
 244 rte_intr_free_epoll_fd(struct rte_intr_handle *intr_handle)
 245 {
 246         RTE_SET_USED(intr_handle);
 247 }