Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 1 | /* |
Mohit Khanna | c964965 | 2018-11-28 18:10:28 -0800 | [diff] [blame^] | 2 | * Copyright (c) 2014-2019 The Linux Foundation. All rights reserved. |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 3 | * |
| 4 | * Permission to use, copy, modify, and/or distribute this software for |
| 5 | * any purpose with or without fee is hereby granted, provided that the |
| 6 | * above copyright notice and this permission notice appear in all |
| 7 | * copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 10 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 11 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 12 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 13 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 14 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 15 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 16 | * PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include <dp_txrx.h> |
| 20 | #include <cdp_txrx_cmn_struct.h> |
| 21 | #include <cdp_txrx_peer_ops.h> |
| 22 | #include <cds_sched.h> |
| 23 | |
| 24 | /* Timeout in ms to wait for a DP rx thread */ |
| 25 | #define DP_RX_THREAD_WAIT_TIMEOUT 200 |
| 26 | |
| 27 | #define DP_RX_TM_DEBUG 0 |
| 28 | #if DP_RX_TM_DEBUG |
| 29 | /** |
| 30 | * dp_rx_tm_walk_skb_list() - Walk skb list and print members |
| 31 | * @nbuf_list - nbuf list to print |
| 32 | * |
| 33 | * Returns: None |
| 34 | */ |
| 35 | static inline void dp_rx_tm_walk_skb_list(qdf_nbuf_t nbuf_list) |
| 36 | { |
| 37 | qdf_nbuf_t nbuf; |
| 38 | int i = 0; |
| 39 | |
| 40 | nbuf = nbuf_list; |
| 41 | while (nbuf) { |
| 42 | dp_debug("%d nbuf:%pk nbuf->next:%pK nbuf->data:%pk ", i, |
| 43 | nbuf, qdf_nbuf_next(nbuf), qdf_nbuf_data(nbuf)); |
| 44 | nbuf = qdf_nbuf_next(nbuf); |
| 45 | i++; |
| 46 | } |
| 47 | } |
| 48 | #else |
| 49 | static inline void dp_rx_tm_walk_skb_list(qdf_nbuf_t nbuf_list) |
| 50 | { } |
| 51 | #endif /* DP_RX_TM_DEBUG */ |
| 52 | |
| 53 | /** |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 54 | * dp_rx_tm_get_soc_handle() - get soc handle from struct dp_rx_tm_handle_cmn |
| 55 | * @rx_tm_handle_cmn - rx thread manager cmn handle |
| 56 | * |
| 57 | * Returns: ol_txrx_soc_handle on success, NULL on failure. |
| 58 | */ |
| 59 | static inline |
| 60 | ol_txrx_soc_handle dp_rx_tm_get_soc_handle(struct dp_rx_tm_handle_cmn *rx_tm_handle_cmn) |
| 61 | { |
| 62 | struct dp_txrx_handle_cmn *txrx_handle_cmn; |
| 63 | ol_txrx_soc_handle soc; |
| 64 | |
| 65 | txrx_handle_cmn = |
| 66 | dp_rx_thread_get_txrx_handle(rx_tm_handle_cmn); |
| 67 | |
| 68 | soc = dp_txrx_get_soc_from_ext_handle(txrx_handle_cmn); |
| 69 | return soc; |
| 70 | } |
| 71 | |
| 72 | /** |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 73 | * dp_rx_tm_thread_dump_stats() - display stats for a rx_thread |
| 74 | * @rx_thread - rx_thread pointer for which the stats need to be |
| 75 | * displayed |
| 76 | * |
| 77 | * Returns: None |
| 78 | */ |
| 79 | static void dp_rx_tm_thread_dump_stats(struct dp_rx_thread *rx_thread) |
| 80 | { |
| 81 | uint8_t reo_ring_num; |
| 82 | uint32_t off = 0; |
| 83 | char nbuf_queued_string[100]; |
| 84 | uint32_t total_queued = 0; |
| 85 | uint32_t temp = 0; |
| 86 | |
| 87 | qdf_mem_set(nbuf_queued_string, 0, sizeof(nbuf_queued_string)); |
| 88 | |
| 89 | for (reo_ring_num = 0; reo_ring_num < DP_RX_TM_MAX_REO_RINGS; |
| 90 | reo_ring_num++) { |
| 91 | temp = rx_thread->stats.nbuf_queued[reo_ring_num]; |
| 92 | if (!temp) |
| 93 | continue; |
| 94 | total_queued += temp; |
| 95 | if (off >= sizeof(nbuf_queued_string)) |
| 96 | continue; |
| 97 | off += qdf_scnprintf(&nbuf_queued_string[off], |
| 98 | sizeof(nbuf_queued_string) - off, |
| 99 | "reo[%u]:%u ", reo_ring_num, temp); |
| 100 | } |
Mohit Khanna | c964965 | 2018-11-28 18:10:28 -0800 | [diff] [blame^] | 101 | |
| 102 | if (!total_queued) |
| 103 | return; |
| 104 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 105 | dp_info("thread:%u - qlen:%u queued:(total:%u %s) dequeued:%u stack:%u max_len:%u invalid(peer:%u vdev:%u others:%u)", |
| 106 | rx_thread->id, |
| 107 | qdf_nbuf_queue_head_qlen(&rx_thread->nbuf_queue), |
| 108 | total_queued, |
| 109 | nbuf_queued_string, |
| 110 | rx_thread->stats.nbuf_dequeued, |
| 111 | rx_thread->stats.nbuf_sent_to_stack, |
| 112 | rx_thread->stats.nbufq_max_len, |
| 113 | rx_thread->stats.dropped_invalid_peer, |
| 114 | rx_thread->stats.dropped_invalid_vdev, |
| 115 | rx_thread->stats.dropped_others); |
| 116 | } |
| 117 | |
| 118 | QDF_STATUS dp_rx_tm_dump_stats(struct dp_rx_tm_handle *rx_tm_hdl) |
| 119 | { |
| 120 | int i; |
| 121 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 122 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 123 | if (!rx_tm_hdl->rx_thread[i]) |
| 124 | continue; |
| 125 | dp_rx_tm_thread_dump_stats(rx_tm_hdl->rx_thread[i]); |
| 126 | } |
| 127 | return QDF_STATUS_SUCCESS; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * dp_rx_tm_thread_enqueue() - enqueue nbuf list into rx_thread |
| 132 | * @rx_thread - rx_thread in which the nbuf needs to be queued |
| 133 | * @nbuf_list - list of packets to be queued into the thread |
| 134 | * |
| 135 | * Enqueue packet into rx_thread and wake it up. The function |
| 136 | * moves the next pointer of the nbuf_list into the ext list of |
| 137 | * the first nbuf for storage into the thread. Only the first |
| 138 | * nbuf is queued into the thread nbuf queue. The reverse is |
| 139 | * done at the time of dequeue. |
| 140 | * |
| 141 | * Returns: QDF_STATUS_SUCCESS on success or qdf error code on |
| 142 | * failure |
| 143 | */ |
| 144 | static QDF_STATUS dp_rx_tm_thread_enqueue(struct dp_rx_thread *rx_thread, |
| 145 | qdf_nbuf_t nbuf_list) |
| 146 | { |
| 147 | qdf_nbuf_t head_ptr, next_ptr_list; |
| 148 | uint32_t temp_qlen; |
| 149 | uint32_t num_elements_in_nbuf; |
| 150 | struct dp_rx_tm_handle_cmn *tm_handle_cmn; |
| 151 | uint8_t reo_ring_num = QDF_NBUF_CB_RX_CTX_ID(nbuf_list); |
| 152 | qdf_wait_queue_head_t *wait_q_ptr; |
| 153 | |
| 154 | tm_handle_cmn = rx_thread->rtm_handle_cmn; |
| 155 | |
| 156 | if (!tm_handle_cmn) { |
| 157 | dp_alert("tm_handle_cmn is null!"); |
| 158 | QDF_BUG(0); |
| 159 | return QDF_STATUS_E_FAILURE; |
| 160 | } |
| 161 | |
| 162 | wait_q_ptr = dp_rx_thread_get_wait_queue(tm_handle_cmn); |
| 163 | |
| 164 | if (reo_ring_num >= DP_RX_TM_MAX_REO_RINGS) { |
| 165 | dp_alert("incorrect ring %u", reo_ring_num); |
| 166 | QDF_BUG(0); |
| 167 | return QDF_STATUS_E_FAILURE; |
| 168 | } |
| 169 | |
| 170 | num_elements_in_nbuf = QDF_NBUF_CB_RX_NUM_ELEMENTS_IN_LIST(nbuf_list); |
| 171 | |
| 172 | dp_rx_tm_walk_skb_list(nbuf_list); |
| 173 | |
| 174 | head_ptr = nbuf_list; |
Pramod Simha | 7ee7b53 | 2018-08-20 15:46:34 -0700 | [diff] [blame] | 175 | |
| 176 | /* Ensure head doesn't have an ext list */ |
| 177 | while (qdf_unlikely(head_ptr && qdf_nbuf_get_ext_list(head_ptr))) { |
| 178 | QDF_NBUF_CB_RX_NUM_ELEMENTS_IN_LIST(head_ptr) = 1; |
| 179 | num_elements_in_nbuf--; |
| 180 | next_ptr_list = head_ptr->next; |
| 181 | qdf_nbuf_set_next(head_ptr, NULL); |
| 182 | qdf_nbuf_queue_head_enqueue_tail(&rx_thread->nbuf_queue, |
| 183 | head_ptr); |
| 184 | head_ptr = next_ptr_list; |
| 185 | } |
| 186 | |
| 187 | if (!head_ptr) |
| 188 | goto enq_done; |
| 189 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 190 | next_ptr_list = head_ptr->next; |
| 191 | |
| 192 | if (next_ptr_list) { |
| 193 | /* move ->next pointer to ext list */ |
| 194 | qdf_nbuf_append_ext_list(head_ptr, next_ptr_list, 0); |
| 195 | dp_debug("appended next_ptr_list %pK to nbuf %pK ext list %pK", |
| 196 | qdf_nbuf_next(nbuf_list), nbuf_list, |
| 197 | qdf_nbuf_get_ext_list(nbuf_list)); |
| 198 | } |
| 199 | qdf_nbuf_set_next(head_ptr, NULL); |
| 200 | |
| 201 | qdf_nbuf_queue_head_enqueue_tail(&rx_thread->nbuf_queue, head_ptr); |
Pramod Simha | 7ee7b53 | 2018-08-20 15:46:34 -0700 | [diff] [blame] | 202 | |
| 203 | enq_done: |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 204 | temp_qlen = qdf_nbuf_queue_head_qlen(&rx_thread->nbuf_queue); |
| 205 | |
| 206 | rx_thread->stats.nbuf_queued[reo_ring_num] += num_elements_in_nbuf; |
| 207 | |
| 208 | if (temp_qlen > rx_thread->stats.nbufq_max_len) |
| 209 | rx_thread->stats.nbufq_max_len = temp_qlen; |
| 210 | |
| 211 | qdf_set_bit(RX_POST_EVENT, &rx_thread->event_flag); |
| 212 | qdf_wake_up_interruptible(wait_q_ptr); |
| 213 | |
| 214 | return QDF_STATUS_SUCCESS; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * dp_rx_tm_thread_dequeue() - dequeue nbuf list from rx_thread |
| 219 | * @rx_thread - rx_thread from which the nbuf needs to be dequeued |
| 220 | * |
| 221 | * Returns: nbuf or nbuf_list dequeued from rx_thread |
| 222 | */ |
| 223 | static qdf_nbuf_t dp_rx_tm_thread_dequeue(struct dp_rx_thread *rx_thread) |
| 224 | { |
| 225 | qdf_nbuf_t head, next_ptr_list, nbuf_list; |
| 226 | |
| 227 | head = qdf_nbuf_queue_head_dequeue(&rx_thread->nbuf_queue); |
| 228 | nbuf_list = head; |
Pramod Simha | 7ee7b53 | 2018-08-20 15:46:34 -0700 | [diff] [blame] | 229 | if (head && QDF_NBUF_CB_RX_NUM_ELEMENTS_IN_LIST(head) > 1) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 230 | /* move ext list to ->next pointer */ |
| 231 | next_ptr_list = qdf_nbuf_get_ext_list(head); |
| 232 | qdf_nbuf_append_ext_list(head, NULL, 0); |
| 233 | qdf_nbuf_set_next(nbuf_list, next_ptr_list); |
| 234 | dp_rx_tm_walk_skb_list(nbuf_list); |
| 235 | } |
| 236 | return nbuf_list; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * dp_rx_thread_process_nbufq() - process nbuf queue of a thread |
| 241 | * @rx_thread - rx_thread whose nbuf queue needs to be processed |
| 242 | * |
| 243 | * Returns: 0 on success, error code on failure |
| 244 | */ |
| 245 | static int dp_rx_thread_process_nbufq(struct dp_rx_thread *rx_thread) |
| 246 | { |
| 247 | qdf_nbuf_t nbuf_list; |
| 248 | uint32_t peer_local_id; |
| 249 | void *peer; |
| 250 | struct cdp_vdev *vdev; |
| 251 | ol_txrx_rx_fp stack_fn; |
| 252 | ol_osif_vdev_handle osif_vdev; |
| 253 | ol_txrx_soc_handle soc; |
| 254 | uint32_t num_list_elements = 0; |
| 255 | struct cdp_pdev *pdev; |
| 256 | |
| 257 | struct dp_txrx_handle_cmn *txrx_handle_cmn; |
| 258 | |
| 259 | txrx_handle_cmn = |
| 260 | dp_rx_thread_get_txrx_handle(rx_thread->rtm_handle_cmn); |
| 261 | |
| 262 | soc = dp_txrx_get_soc_from_ext_handle(txrx_handle_cmn); |
| 263 | pdev = dp_txrx_get_pdev_from_ext_handle(txrx_handle_cmn); |
| 264 | |
| 265 | if (!soc || !pdev) { |
| 266 | dp_err("invalid soc or pdev!"); |
| 267 | QDF_BUG(0); |
| 268 | return -EFAULT; |
| 269 | } |
| 270 | |
| 271 | nbuf_list = dp_rx_tm_thread_dequeue(rx_thread); |
| 272 | while (nbuf_list) { |
| 273 | num_list_elements = |
| 274 | QDF_NBUF_CB_RX_NUM_ELEMENTS_IN_LIST(nbuf_list); |
| 275 | rx_thread->stats.nbuf_dequeued += num_list_elements; |
| 276 | |
| 277 | peer_local_id = QDF_NBUF_CB_RX_PEER_LOCAL_ID(nbuf_list); |
| 278 | peer = cdp_peer_find_by_local_id(soc, pdev, peer_local_id); |
| 279 | |
| 280 | if (!peer) { |
| 281 | rx_thread->stats.dropped_invalid_peer += |
| 282 | num_list_elements; |
| 283 | dp_err("peer not found for local_id %u!", |
| 284 | peer_local_id); |
| 285 | qdf_nbuf_list_free(nbuf_list); |
Sravan Kumar Kairam | 0512a84 | 2018-09-12 15:27:45 +0530 | [diff] [blame] | 286 | goto dequeue_rx_thread; |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | vdev = cdp_peer_get_vdev(soc, peer); |
| 290 | if (!vdev) { |
| 291 | rx_thread->stats.dropped_invalid_vdev += |
| 292 | num_list_elements; |
| 293 | dp_err("vdev not found for local_id %u!, pkt dropped", |
| 294 | peer_local_id); |
| 295 | qdf_nbuf_list_free(nbuf_list); |
Sravan Kumar Kairam | 0512a84 | 2018-09-12 15:27:45 +0530 | [diff] [blame] | 296 | goto dequeue_rx_thread; |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | cdp_get_os_rx_handles_from_vdev(soc, vdev, &stack_fn, |
| 300 | &osif_vdev); |
| 301 | if (!stack_fn || !osif_vdev) { |
| 302 | dp_alert("stack_fn or osif_vdev is null, pkt dropped!"); |
| 303 | QDF_BUG(0); |
| 304 | rx_thread->stats.dropped_others += |
| 305 | num_list_elements; |
| 306 | qdf_nbuf_list_free(nbuf_list); |
Sravan Kumar Kairam | 0512a84 | 2018-09-12 15:27:45 +0530 | [diff] [blame] | 307 | goto dequeue_rx_thread; |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 308 | } |
| 309 | stack_fn(osif_vdev, nbuf_list); |
| 310 | rx_thread->stats.nbuf_sent_to_stack += num_list_elements; |
| 311 | |
Sravan Kumar Kairam | 0512a84 | 2018-09-12 15:27:45 +0530 | [diff] [blame] | 312 | dequeue_rx_thread: |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 313 | nbuf_list = dp_rx_tm_thread_dequeue(rx_thread); |
| 314 | } |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * dp_rx_thread_sub_loop() - rx thread subloop |
| 321 | * @rx_thread - rx_thread to be processed |
| 322 | * @shutdown - pointer to shutdown variable |
| 323 | * |
| 324 | * The function handles shutdown and suspend events from other |
| 325 | * threads and processes nbuf queue of a rx thread. In case a |
| 326 | * shutdown event is received from some other wlan thread, the |
| 327 | * function sets the shutdown pointer to true and returns |
| 328 | * |
| 329 | * Returns: 0 on success, error code on failure |
| 330 | */ |
| 331 | static int dp_rx_thread_sub_loop(struct dp_rx_thread *rx_thread, bool *shutdown) |
| 332 | { |
| 333 | while (true) { |
| 334 | if (qdf_atomic_test_and_clear_bit(RX_SHUTDOWN_EVENT, |
| 335 | &rx_thread->event_flag)) { |
| 336 | if (qdf_atomic_test_and_clear_bit(RX_SUSPEND_EVENT, |
| 337 | &rx_thread->event_flag)) { |
| 338 | qdf_event_set(&rx_thread->suspend_event); |
| 339 | } |
| 340 | dp_debug("shutting down (%s) id %d pid %d", |
| 341 | qdf_get_current_comm(), rx_thread->id, |
| 342 | qdf_get_current_pid()); |
| 343 | *shutdown = true; |
| 344 | break; |
| 345 | } |
| 346 | |
| 347 | dp_rx_thread_process_nbufq(rx_thread); |
| 348 | |
| 349 | if (qdf_atomic_test_and_clear_bit(RX_SUSPEND_EVENT, |
| 350 | &rx_thread->event_flag)) { |
| 351 | dp_debug("received suspend ind (%s) id %d pid %d", |
| 352 | qdf_get_current_comm(), rx_thread->id, |
| 353 | qdf_get_current_pid()); |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 354 | qdf_event_reset(&rx_thread->resume_event); |
| 355 | qdf_event_set(&rx_thread->suspend_event); |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 356 | dp_debug("waiting for resume (%s) id %d pid %d", |
| 357 | qdf_get_current_comm(), rx_thread->id, |
| 358 | qdf_get_current_pid()); |
| 359 | qdf_wait_single_event(&rx_thread->resume_event, 0); |
| 360 | } |
| 361 | break; |
| 362 | } |
| 363 | return 0; |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * dp_rx_thread_loop() - main dp rx thread loop |
| 368 | * @arg: pointer to dp_rx_thread structure for the rx thread |
| 369 | * |
| 370 | * Return: thread exit code |
| 371 | */ |
| 372 | static int dp_rx_thread_loop(void *arg) |
| 373 | { |
| 374 | struct dp_rx_thread *rx_thread = arg; |
| 375 | bool shutdown = false; |
| 376 | int status; |
| 377 | struct dp_rx_tm_handle_cmn *tm_handle_cmn; |
| 378 | |
| 379 | tm_handle_cmn = rx_thread->rtm_handle_cmn; |
| 380 | |
| 381 | if (!arg) { |
| 382 | dp_err("bad Args passed"); |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | qdf_set_user_nice(qdf_get_current_task(), -1); |
| 387 | qdf_set_wake_up_idle(true); |
| 388 | |
| 389 | qdf_event_set(&rx_thread->start_event); |
| 390 | dp_info("starting rx_thread (%s) id %d pid %d", qdf_get_current_comm(), |
| 391 | rx_thread->id, qdf_get_current_pid()); |
| 392 | while (!shutdown) { |
| 393 | /* This implements the execution model algorithm */ |
| 394 | dp_debug("sleeping"); |
| 395 | status = |
| 396 | qdf_wait_queue_interruptible |
| 397 | (DP_RX_THREAD_GET_WAIT_QUEUE_OBJ(tm_handle_cmn), |
| 398 | qdf_atomic_test_bit(RX_POST_EVENT, |
| 399 | &rx_thread->event_flag) || |
| 400 | qdf_atomic_test_bit(RX_SUSPEND_EVENT, |
| 401 | &rx_thread->event_flag)); |
| 402 | dp_debug("woken up"); |
| 403 | |
| 404 | if (status == -ERESTARTSYS) { |
| 405 | dp_err("wait_event_interruptible returned -ERESTARTSYS"); |
| 406 | QDF_DEBUG_PANIC(); |
| 407 | break; |
| 408 | } |
| 409 | qdf_atomic_clear_bit(RX_POST_EVENT, &rx_thread->event_flag); |
| 410 | dp_rx_thread_sub_loop(rx_thread, &shutdown); |
| 411 | } |
| 412 | |
| 413 | /* If we get here the scheduler thread must exit */ |
| 414 | dp_info("exiting (%s) id %d pid %d", qdf_get_current_comm(), |
| 415 | rx_thread->id, qdf_get_current_pid()); |
| 416 | qdf_event_set(&rx_thread->shutdown_event); |
| 417 | qdf_exit_thread(QDF_STATUS_SUCCESS); |
| 418 | |
| 419 | return 0; |
| 420 | } |
| 421 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 422 | /** |
| 423 | * dp_rx_tm_thread_napi_poll() - dummy napi poll for rx_thread NAPI |
| 424 | * @napi: pointer to DP rx_thread NAPI |
| 425 | * @budget: NAPI BUDGET |
| 426 | * |
| 427 | * Return: 0 as it is not supposed to be polled at all as it is not scheduled. |
| 428 | */ |
| 429 | static int dp_rx_tm_thread_napi_poll(struct napi_struct *napi, int budget) |
| 430 | { |
| 431 | dp_err("this napi_poll should not be polled as we don't schedule it"); |
| 432 | QDF_BUG(0); |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * dp_rx_tm_thread_napi_init() - Initialize dummy rx_thread NAPI |
| 438 | * @rx_thread: dp_rx_thread structure containing dummy napi and netdev |
| 439 | * |
| 440 | * Return: None |
| 441 | */ |
| 442 | static void dp_rx_tm_thread_napi_init(struct dp_rx_thread *rx_thread) |
| 443 | { |
| 444 | /* Todo - optimize to use only one dummy netdev for all thread napis */ |
| 445 | init_dummy_netdev(&rx_thread->netdev); |
| 446 | netif_napi_add(&rx_thread->netdev, &rx_thread->napi, |
| 447 | dp_rx_tm_thread_napi_poll, 64); |
| 448 | napi_enable(&rx_thread->napi); |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * dp_rx_tm_thread_napi_deinit() - De-initialize dummy rx_thread NAPI |
| 453 | * @rx_thread: dp_rx_thread handle containing dummy napi and netdev |
| 454 | * |
| 455 | * Return: None |
| 456 | */ |
| 457 | static void dp_rx_tm_thread_napi_deinit(struct dp_rx_thread *rx_thread) |
| 458 | { |
| 459 | netif_napi_del(&rx_thread->napi); |
| 460 | } |
| 461 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 462 | /* |
| 463 | * dp_rx_tm_thread_init() - Initialize dp_rx_thread structure and thread |
| 464 | * |
| 465 | * @rx_thread: dp_rx_thread structure to be initialized |
| 466 | * @id: id of the thread to be initialized |
| 467 | * |
| 468 | * Return: QDF_STATUS on success, QDF error code on failure |
| 469 | */ |
| 470 | static QDF_STATUS dp_rx_tm_thread_init(struct dp_rx_thread *rx_thread, |
| 471 | uint8_t id) |
| 472 | { |
| 473 | char thread_name[15]; |
| 474 | QDF_STATUS qdf_status; |
| 475 | |
| 476 | qdf_mem_set(thread_name, 0, sizeof(thread_name)); |
| 477 | |
| 478 | if (!rx_thread) { |
| 479 | dp_err("rx_thread is null!"); |
| 480 | return QDF_STATUS_E_FAULT; |
| 481 | } |
| 482 | rx_thread->id = id; |
| 483 | rx_thread->event_flag = 0; |
| 484 | qdf_nbuf_queue_head_init(&rx_thread->nbuf_queue); |
| 485 | qdf_event_create(&rx_thread->start_event); |
| 486 | qdf_event_create(&rx_thread->suspend_event); |
| 487 | qdf_event_create(&rx_thread->resume_event); |
| 488 | qdf_event_create(&rx_thread->shutdown_event); |
| 489 | qdf_scnprintf(thread_name, sizeof(thread_name), "dp_rx_thread_%u", id); |
| 490 | dp_info("%s %u", thread_name, id); |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 491 | |
| 492 | if (cdp_cfg_get(dp_rx_tm_get_soc_handle(rx_thread->rtm_handle_cmn), |
| 493 | cfg_dp_gro_enable)) |
| 494 | dp_rx_tm_thread_napi_init(rx_thread); |
| 495 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 496 | rx_thread->task = qdf_create_thread(dp_rx_thread_loop, |
| 497 | rx_thread, thread_name); |
| 498 | if (!rx_thread->task) { |
| 499 | dp_err("could not create dp_rx_thread %d", id); |
| 500 | return QDF_STATUS_E_FAILURE; |
| 501 | } |
| 502 | |
| 503 | qdf_wake_up_process(rx_thread->task); |
| 504 | qdf_status = qdf_wait_single_event(&rx_thread->start_event, 0); |
| 505 | |
| 506 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) { |
| 507 | dp_err("failed waiting for thread creation id %d", id); |
| 508 | return QDF_STATUS_E_FAILURE; |
| 509 | } |
| 510 | return QDF_STATUS_SUCCESS; |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * dp_rx_tm_thread_deinit() - De-Initialize dp_rx_thread structure and thread |
| 515 | * @rx_thread: dp_rx_thread structure to be de-initialized |
| 516 | * @id: id of the thread to be initialized |
| 517 | * |
| 518 | * Return: QDF_STATUS_SUCCESS |
| 519 | */ |
| 520 | static QDF_STATUS dp_rx_tm_thread_deinit(struct dp_rx_thread *rx_thread) |
| 521 | { |
| 522 | qdf_event_destroy(&rx_thread->start_event); |
| 523 | qdf_event_destroy(&rx_thread->suspend_event); |
| 524 | qdf_event_destroy(&rx_thread->resume_event); |
| 525 | qdf_event_destroy(&rx_thread->shutdown_event); |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 526 | |
| 527 | if (cdp_cfg_get(dp_rx_tm_get_soc_handle(rx_thread->rtm_handle_cmn), |
| 528 | cfg_dp_gro_enable)) |
| 529 | dp_rx_tm_thread_napi_deinit(rx_thread); |
| 530 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 531 | return QDF_STATUS_SUCCESS; |
| 532 | } |
| 533 | |
| 534 | QDF_STATUS dp_rx_tm_init(struct dp_rx_tm_handle *rx_tm_hdl, |
| 535 | uint8_t num_dp_rx_threads) |
| 536 | { |
| 537 | int i; |
| 538 | QDF_STATUS qdf_status = QDF_STATUS_SUCCESS; |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 539 | |
| 540 | if (num_dp_rx_threads > DP_MAX_RX_THREADS) { |
| 541 | dp_err("unable to initialize %u number of threads. MAX %u", |
| 542 | num_dp_rx_threads, DP_MAX_RX_THREADS); |
| 543 | return QDF_STATUS_E_INVAL; |
| 544 | } |
| 545 | |
| 546 | rx_tm_hdl->num_dp_rx_threads = num_dp_rx_threads; |
| 547 | |
| 548 | dp_info("initializing %u threads", num_dp_rx_threads); |
| 549 | |
| 550 | /* allocate an array to contain the DP RX thread pointers */ |
| 551 | rx_tm_hdl->rx_thread = qdf_mem_malloc(num_dp_rx_threads * |
| 552 | sizeof(struct dp_rx_thread *)); |
| 553 | |
| 554 | if (qdf_unlikely(!rx_tm_hdl->rx_thread)) { |
| 555 | qdf_status = QDF_STATUS_E_NOMEM; |
| 556 | goto ret; |
| 557 | } |
| 558 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 559 | qdf_init_waitqueue_head(&rx_tm_hdl->wait_q); |
| 560 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 561 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 562 | rx_tm_hdl->rx_thread[i] = |
| 563 | (struct dp_rx_thread *) |
| 564 | qdf_mem_malloc(sizeof(struct dp_rx_thread)); |
| 565 | if (qdf_unlikely(!rx_tm_hdl->rx_thread[i])) { |
| 566 | QDF_ASSERT(0); |
| 567 | qdf_status = QDF_STATUS_E_NOMEM; |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 568 | goto ret; |
| 569 | } |
| 570 | rx_tm_hdl->rx_thread[i]->rtm_handle_cmn = |
| 571 | (struct dp_rx_tm_handle_cmn *)rx_tm_hdl; |
| 572 | qdf_status = |
| 573 | dp_rx_tm_thread_init(rx_tm_hdl->rx_thread[i], i); |
| 574 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) |
| 575 | break; |
| 576 | } |
| 577 | ret: |
| 578 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) |
| 579 | dp_rx_tm_deinit(rx_tm_hdl); |
| 580 | |
| 581 | return qdf_status; |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * dp_rx_tm_resume() - suspend DP RX threads |
| 586 | * @rx_tm_hdl: dp_rx_tm_handle containing the overall thread |
| 587 | * infrastructure |
| 588 | * |
| 589 | * Return: QDF_STATUS_SUCCESS |
| 590 | */ |
| 591 | QDF_STATUS dp_rx_tm_suspend(struct dp_rx_tm_handle *rx_tm_hdl) |
| 592 | { |
| 593 | int i; |
| 594 | QDF_STATUS qdf_status; |
| 595 | struct dp_rx_thread *rx_thread; |
| 596 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 597 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 598 | if (!rx_tm_hdl->rx_thread[i]) |
| 599 | continue; |
| 600 | qdf_set_bit(RX_SUSPEND_EVENT, |
| 601 | &rx_tm_hdl->rx_thread[i]->event_flag); |
| 602 | } |
| 603 | |
| 604 | qdf_wake_up_interruptible(&rx_tm_hdl->wait_q); |
| 605 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 606 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 607 | rx_thread = rx_tm_hdl->rx_thread[i]; |
| 608 | if (!rx_thread) |
| 609 | continue; |
| 610 | dp_debug("thread %d", i); |
| 611 | qdf_status = qdf_wait_single_event(&rx_thread->suspend_event, |
| 612 | DP_RX_THREAD_WAIT_TIMEOUT); |
| 613 | if (QDF_IS_STATUS_SUCCESS(qdf_status)) |
| 614 | dp_debug("thread:%d suspended", rx_thread->id); |
| 615 | else if (qdf_status == QDF_STATUS_E_TIMEOUT) |
| 616 | dp_err("thread:%d timed out waiting for suspend", |
| 617 | rx_thread->id); |
| 618 | else |
| 619 | dp_err("thread:%d failed while waiting for suspend", |
| 620 | rx_thread->id); |
| 621 | } |
| 622 | rx_tm_hdl->state = DP_RX_THREAD_SUSPENDED; |
| 623 | |
| 624 | return QDF_STATUS_SUCCESS; |
| 625 | } |
| 626 | |
| 627 | /** |
| 628 | * dp_rx_tm_resume() - resume DP RX threads |
| 629 | * @rx_tm_hdl: dp_rx_tm_handle containing the overall thread |
| 630 | * infrastructure |
| 631 | * |
| 632 | * Return: QDF_STATUS_SUCCESS |
| 633 | */ |
| 634 | QDF_STATUS dp_rx_tm_resume(struct dp_rx_tm_handle *rx_tm_hdl) |
| 635 | { |
| 636 | int i; |
| 637 | |
| 638 | if (rx_tm_hdl->state != DP_RX_THREAD_SUSPENDED) { |
| 639 | dp_err("resume callback received without suspend"); |
| 640 | return QDF_STATUS_E_FAULT; |
| 641 | } |
| 642 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 643 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 644 | if (!rx_tm_hdl->rx_thread[i]) |
| 645 | continue; |
| 646 | dp_debug("calling thread %d to resume", i); |
| 647 | qdf_event_set(&rx_tm_hdl->rx_thread[i]->resume_event); |
| 648 | } |
| 649 | |
| 650 | return QDF_STATUS_SUCCESS; |
| 651 | } |
| 652 | |
| 653 | /** |
| 654 | * dp_rx_tm_shutdown() - shutdown all DP RX threads |
| 655 | * @rx_tm_hdl: dp_rx_tm_handle containing the overall thread infrastructure |
| 656 | * |
| 657 | * Return: QDF_STATUS_SUCCESS |
| 658 | */ |
| 659 | static QDF_STATUS dp_rx_tm_shutdown(struct dp_rx_tm_handle *rx_tm_hdl) |
| 660 | { |
| 661 | int i; |
| 662 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 663 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 664 | if (!rx_tm_hdl->rx_thread[i]) |
| 665 | continue; |
| 666 | qdf_set_bit(RX_SHUTDOWN_EVENT, |
| 667 | &rx_tm_hdl->rx_thread[i]->event_flag); |
| 668 | qdf_set_bit(RX_POST_EVENT, |
| 669 | &rx_tm_hdl->rx_thread[i]->event_flag); |
| 670 | } |
| 671 | |
| 672 | qdf_wake_up_interruptible(&rx_tm_hdl->wait_q); |
| 673 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 674 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 675 | if (!rx_tm_hdl->rx_thread[i]) |
| 676 | continue; |
| 677 | dp_debug("waiting for shutdown of thread %d", i); |
| 678 | qdf_wait_single_event(&rx_tm_hdl->rx_thread[i]->shutdown_event, |
| 679 | 0); |
| 680 | } |
| 681 | return QDF_STATUS_SUCCESS; |
| 682 | } |
| 683 | |
| 684 | /** |
| 685 | * dp_rx_tm_deinit() - de-initialize RX thread infrastructure |
| 686 | * @rx_tm_hdl: dp_rx_tm_handle containing the overall thread |
| 687 | * infrastructure |
| 688 | * |
| 689 | * Return: QDF_STATUS_SUCCESS |
| 690 | */ |
| 691 | QDF_STATUS dp_rx_tm_deinit(struct dp_rx_tm_handle *rx_tm_hdl) |
| 692 | { |
| 693 | int i = 0; |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 694 | if (!rx_tm_hdl->rx_thread) { |
| 695 | dp_err("rx_tm_hdl->rx_thread not initialized!"); |
| 696 | return QDF_STATUS_SUCCESS; |
| 697 | } |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 698 | |
| 699 | dp_rx_tm_shutdown(rx_tm_hdl); |
| 700 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 701 | for (i = 0; i < rx_tm_hdl->num_dp_rx_threads; i++) { |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 702 | if (!rx_tm_hdl->rx_thread[i]) |
| 703 | continue; |
| 704 | dp_rx_tm_thread_deinit(rx_tm_hdl->rx_thread[i]); |
| 705 | qdf_mem_free(rx_tm_hdl->rx_thread[i]); |
| 706 | } |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 707 | |
| 708 | /* free the array of RX thread pointers*/ |
| 709 | qdf_mem_free(rx_tm_hdl->rx_thread); |
| 710 | rx_tm_hdl->rx_thread = NULL; |
| 711 | |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 712 | return QDF_STATUS_SUCCESS; |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * dp_rx_tm_select_thread() - select a DP RX thread for a nbuf |
| 717 | * @rx_tm_hdl: dp_rx_tm_handle containing the overall thread |
| 718 | * infrastructure |
| 719 | * @nbuf_list: list of nbufs to be enqueued in to the thread |
| 720 | * |
| 721 | * The function relies on the presence of QDF_NBUF_CB_RX_CTX_ID |
| 722 | * in the nbuf list. Depending on the RX_CTX (copy engine or reo |
| 723 | * ring) on which the packet was received, the function selects |
| 724 | * a corresponding rx_thread. |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 725 | * |
| 726 | * Return: rx thread ID selected for the nbuf |
| 727 | */ |
| 728 | static uint8_t dp_rx_tm_select_thread(struct dp_rx_tm_handle *rx_tm_hdl, |
| 729 | qdf_nbuf_t nbuf_list) |
| 730 | { |
| 731 | uint8_t selected_rx_thread; |
| 732 | uint8_t reo_ring_num = QDF_NBUF_CB_RX_CTX_ID(nbuf_list); |
| 733 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 734 | if (reo_ring_num >= rx_tm_hdl->num_dp_rx_threads) { |
| 735 | dp_err_rl("unexpected ring number"); |
| 736 | QDF_BUG(0); |
| 737 | return 0; |
| 738 | } |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 739 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 740 | selected_rx_thread = reo_ring_num; |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 741 | return selected_rx_thread; |
| 742 | } |
| 743 | |
| 744 | QDF_STATUS dp_rx_tm_enqueue_pkt(struct dp_rx_tm_handle *rx_tm_hdl, |
| 745 | qdf_nbuf_t nbuf_list) |
| 746 | { |
| 747 | uint8_t selected_thread_id; |
| 748 | |
| 749 | selected_thread_id = dp_rx_tm_select_thread(rx_tm_hdl, nbuf_list); |
Mohit Khanna | 7032200 | 2018-05-15 19:21:32 -0700 | [diff] [blame] | 750 | dp_rx_tm_thread_enqueue(rx_tm_hdl->rx_thread[selected_thread_id], |
| 751 | nbuf_list); |
| 752 | return QDF_STATUS_SUCCESS; |
| 753 | } |
| 754 | |
Mohit Khanna | 8141877 | 2018-10-30 14:14:46 -0700 | [diff] [blame] | 755 | struct napi_struct *dp_rx_tm_get_napi_context(struct dp_rx_tm_handle *rx_tm_hdl, |
| 756 | uint8_t rx_ctx_id) |
| 757 | { |
| 758 | if (rx_ctx_id >= rx_tm_hdl->num_dp_rx_threads) { |
| 759 | dp_err_rl("unexpected rx_ctx_id %u", rx_ctx_id); |
| 760 | QDF_BUG(0); |
| 761 | return NULL; |
| 762 | } |
| 763 | |
| 764 | return &rx_tm_hdl->rx_thread[rx_ctx_id]->napi; |
| 765 | } |