Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame^] | 1 | /* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/err.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/ratelimit.h> |
| 16 | #include <linux/workqueue.h> |
| 17 | #include <linux/diagchar.h> |
| 18 | #include <linux/of.h> |
| 19 | #include <linux/kmemleak.h> |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/atomic.h> |
| 22 | #include "diagchar.h" |
| 23 | #include "diagchar_hdlc.h" |
| 24 | #include "diagfwd_peripheral.h" |
| 25 | #include "diagfwd_cntl.h" |
| 26 | #include "diag_masks.h" |
| 27 | #include "diag_dci.h" |
| 28 | #include "diagfwd.h" |
| 29 | #include "diagfwd_socket.h" |
| 30 | #include "diag_mux.h" |
| 31 | #include "diag_ipc_logging.h" |
| 32 | #include "diagfwd_glink.h" |
| 33 | |
| 34 | struct data_header { |
| 35 | uint8_t control_char; |
| 36 | uint8_t version; |
| 37 | uint16_t length; |
| 38 | }; |
| 39 | |
| 40 | static struct diagfwd_info *early_init_info[NUM_TRANSPORT]; |
| 41 | |
| 42 | static void diagfwd_queue_read(struct diagfwd_info *fwd_info); |
| 43 | static void diagfwd_buffers_exit(struct diagfwd_info *fwd_info); |
| 44 | static void diagfwd_cntl_open(struct diagfwd_info *fwd_info); |
| 45 | static void diagfwd_cntl_close(struct diagfwd_info *fwd_info); |
| 46 | static void diagfwd_dci_open(struct diagfwd_info *fwd_info); |
| 47 | static void diagfwd_dci_close(struct diagfwd_info *fwd_info); |
| 48 | static void diagfwd_data_read_done(struct diagfwd_info *fwd_info, |
| 49 | unsigned char *buf, int len); |
| 50 | static void diagfwd_cntl_read_done(struct diagfwd_info *fwd_info, |
| 51 | unsigned char *buf, int len); |
| 52 | static void diagfwd_dci_read_done(struct diagfwd_info *fwd_info, |
| 53 | unsigned char *buf, int len); |
| 54 | static void diagfwd_write_buffers_init(struct diagfwd_info *fwd_info); |
| 55 | static void diagfwd_write_buffers_exit(struct diagfwd_info *fwd_info); |
| 56 | struct diagfwd_info peripheral_info[NUM_TYPES][NUM_PERIPHERALS]; |
| 57 | |
| 58 | static struct diag_channel_ops data_ch_ops = { |
| 59 | .open = NULL, |
| 60 | .close = NULL, |
| 61 | .read_done = diagfwd_data_read_done |
| 62 | }; |
| 63 | |
| 64 | static struct diag_channel_ops cntl_ch_ops = { |
| 65 | .open = diagfwd_cntl_open, |
| 66 | .close = diagfwd_cntl_close, |
| 67 | .read_done = diagfwd_cntl_read_done |
| 68 | }; |
| 69 | |
| 70 | static struct diag_channel_ops dci_ch_ops = { |
| 71 | .open = diagfwd_dci_open, |
| 72 | .close = diagfwd_dci_close, |
| 73 | .read_done = diagfwd_dci_read_done |
| 74 | }; |
| 75 | |
| 76 | static void diagfwd_cntl_open(struct diagfwd_info *fwd_info) |
| 77 | { |
| 78 | if (!fwd_info) |
| 79 | return; |
| 80 | diag_cntl_channel_open(fwd_info); |
| 81 | } |
| 82 | |
| 83 | static void diagfwd_cntl_close(struct diagfwd_info *fwd_info) |
| 84 | { |
| 85 | if (!fwd_info) |
| 86 | return; |
| 87 | diag_cntl_channel_close(fwd_info); |
| 88 | } |
| 89 | |
| 90 | static void diagfwd_dci_open(struct diagfwd_info *fwd_info) |
| 91 | { |
| 92 | if (!fwd_info) |
| 93 | return; |
| 94 | |
| 95 | diag_dci_notify_client(PERIPHERAL_MASK(fwd_info->peripheral), |
| 96 | DIAG_STATUS_OPEN, DCI_LOCAL_PROC); |
| 97 | } |
| 98 | |
| 99 | static void diagfwd_dci_close(struct diagfwd_info *fwd_info) |
| 100 | { |
| 101 | if (!fwd_info) |
| 102 | return; |
| 103 | |
| 104 | diag_dci_notify_client(PERIPHERAL_MASK(fwd_info->peripheral), |
| 105 | DIAG_STATUS_CLOSED, DCI_LOCAL_PROC); |
| 106 | } |
| 107 | |
| 108 | static int diag_add_hdlc_encoding(unsigned char *dest_buf, int *dest_len, |
| 109 | unsigned char *buf, int len) |
| 110 | { |
| 111 | struct diag_send_desc_type send = { NULL, NULL, DIAG_STATE_START, 0 }; |
| 112 | struct diag_hdlc_dest_type enc = { NULL, NULL, 0 }; |
| 113 | struct data_header *header; |
| 114 | int header_size = sizeof(struct data_header); |
| 115 | uint8_t *end_control_char = NULL; |
| 116 | uint8_t *payload = NULL; |
| 117 | uint8_t *temp_buf = NULL; |
| 118 | uint8_t *temp_encode_buf = NULL; |
| 119 | int src_pkt_len; |
| 120 | int encoded_pkt_length; |
| 121 | int max_size; |
| 122 | int total_processed = 0; |
| 123 | int bytes_remaining; |
| 124 | int err = 0; |
| 125 | uint8_t loop_count = 0; |
| 126 | |
| 127 | if (!dest_buf || !dest_len || !buf) |
| 128 | return -EIO; |
| 129 | |
| 130 | temp_buf = buf; |
| 131 | temp_encode_buf = dest_buf; |
| 132 | bytes_remaining = *dest_len; |
| 133 | |
| 134 | while (total_processed < len) { |
| 135 | loop_count++; |
| 136 | header = (struct data_header *)temp_buf; |
| 137 | /* Perform initial error checking */ |
| 138 | if (header->control_char != CONTROL_CHAR || |
| 139 | header->version != 1) { |
| 140 | err = -EINVAL; |
| 141 | break; |
| 142 | } |
| 143 | |
| 144 | if (header->length >= bytes_remaining) |
| 145 | break; |
| 146 | |
| 147 | payload = temp_buf + header_size; |
| 148 | end_control_char = payload + header->length; |
| 149 | if (*end_control_char != CONTROL_CHAR) { |
| 150 | err = -EINVAL; |
| 151 | break; |
| 152 | } |
| 153 | |
| 154 | max_size = 2 * header->length + 3; |
| 155 | if (bytes_remaining < max_size) { |
| 156 | err = -EINVAL; |
| 157 | break; |
| 158 | } |
| 159 | |
| 160 | /* Prepare for encoding the data */ |
| 161 | send.state = DIAG_STATE_START; |
| 162 | send.pkt = payload; |
| 163 | send.last = (void *)(payload + header->length - 1); |
| 164 | send.terminate = 1; |
| 165 | |
| 166 | enc.dest = temp_encode_buf; |
| 167 | enc.dest_last = (void *)(temp_encode_buf + max_size); |
| 168 | enc.crc = 0; |
| 169 | diag_hdlc_encode(&send, &enc); |
| 170 | |
| 171 | /* Prepare for next packet */ |
| 172 | src_pkt_len = (header_size + header->length + 1); |
| 173 | total_processed += src_pkt_len; |
| 174 | temp_buf += src_pkt_len; |
| 175 | |
| 176 | encoded_pkt_length = (uint8_t *)enc.dest - temp_encode_buf; |
| 177 | bytes_remaining -= encoded_pkt_length; |
| 178 | temp_encode_buf = enc.dest; |
| 179 | } |
| 180 | |
| 181 | *dest_len = (int)(temp_encode_buf - dest_buf); |
| 182 | |
| 183 | return err; |
| 184 | } |
| 185 | |
| 186 | static int check_bufsize_for_encoding(struct diagfwd_buf_t *buf, uint32_t len) |
| 187 | { |
| 188 | uint32_t max_size = 0; |
| 189 | unsigned char *temp_buf = NULL; |
| 190 | |
| 191 | if (!buf || len == 0) |
| 192 | return -EINVAL; |
| 193 | |
| 194 | max_size = (2 * len) + 3; |
| 195 | if (max_size > PERIPHERAL_BUF_SZ) { |
| 196 | if (max_size > MAX_PERIPHERAL_HDLC_BUF_SZ) { |
| 197 | pr_err("diag: In %s, max_size is going beyond limit %d\n", |
| 198 | __func__, max_size); |
| 199 | max_size = MAX_PERIPHERAL_HDLC_BUF_SZ; |
| 200 | } |
| 201 | |
| 202 | if (buf->len < max_size) { |
| 203 | temp_buf = krealloc(buf->data, max_size + |
| 204 | APF_DIAG_PADDING, |
| 205 | GFP_KERNEL); |
| 206 | if (!temp_buf) |
| 207 | return -ENOMEM; |
| 208 | buf->data = temp_buf; |
| 209 | buf->len = max_size; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | return buf->len; |
| 214 | } |
| 215 | |
| 216 | static void diagfwd_data_read_done(struct diagfwd_info *fwd_info, |
| 217 | unsigned char *buf, int len) |
| 218 | { |
| 219 | int err = 0; |
| 220 | int write_len = 0; |
| 221 | unsigned char *write_buf = NULL; |
| 222 | struct diagfwd_buf_t *temp_buf = NULL; |
| 223 | struct diag_md_session_t *session_info = NULL; |
| 224 | uint8_t hdlc_disabled = 0; |
| 225 | |
| 226 | if (!fwd_info || !buf || len <= 0) { |
| 227 | diag_ws_release(); |
| 228 | return; |
| 229 | } |
| 230 | |
| 231 | switch (fwd_info->type) { |
| 232 | case TYPE_DATA: |
| 233 | case TYPE_CMD: |
| 234 | break; |
| 235 | default: |
| 236 | pr_err_ratelimited("diag: In %s, invalid type %d for peripheral %d\n", |
| 237 | __func__, fwd_info->type, |
| 238 | fwd_info->peripheral); |
| 239 | diag_ws_release(); |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | mutex_lock(&driver->hdlc_disable_mutex); |
| 244 | mutex_lock(&fwd_info->data_mutex); |
| 245 | session_info = diag_md_session_get_peripheral(fwd_info->peripheral); |
| 246 | if (session_info) |
| 247 | hdlc_disabled = session_info->hdlc_disabled; |
| 248 | else |
| 249 | hdlc_disabled = driver->hdlc_disabled; |
| 250 | |
| 251 | if (!driver->feature[fwd_info->peripheral].encode_hdlc) { |
| 252 | if (fwd_info->buf_1 && fwd_info->buf_1->data == buf) { |
| 253 | temp_buf = fwd_info->buf_1; |
| 254 | write_buf = fwd_info->buf_1->data; |
| 255 | } else if (fwd_info->buf_2 && fwd_info->buf_2->data == buf) { |
| 256 | temp_buf = fwd_info->buf_2; |
| 257 | write_buf = fwd_info->buf_2->data; |
| 258 | } else { |
| 259 | pr_err("diag: In %s, no match for buffer %pK, peripheral %d, type: %d\n", |
| 260 | __func__, buf, fwd_info->peripheral, |
| 261 | fwd_info->type); |
| 262 | goto end; |
| 263 | } |
| 264 | write_len = len; |
| 265 | } else if (hdlc_disabled) { |
| 266 | /* The data is raw and and on APPS side HDLC is disabled */ |
| 267 | if (fwd_info->buf_1 && fwd_info->buf_1->data_raw == buf) { |
| 268 | temp_buf = fwd_info->buf_1; |
| 269 | } else if (fwd_info->buf_2 && |
| 270 | fwd_info->buf_2->data_raw == buf) { |
| 271 | temp_buf = fwd_info->buf_2; |
| 272 | } else { |
| 273 | pr_err("diag: In %s, no match for non encode buffer %pK, peripheral %d, type: %d\n", |
| 274 | __func__, buf, fwd_info->peripheral, |
| 275 | fwd_info->type); |
| 276 | goto end; |
| 277 | } |
| 278 | if (len > PERIPHERAL_BUF_SZ) { |
| 279 | pr_err("diag: In %s, Incoming buffer too large %d, peripheral %d, type: %d\n", |
| 280 | __func__, len, fwd_info->peripheral, |
| 281 | fwd_info->type); |
| 282 | goto end; |
| 283 | } |
| 284 | write_len = len; |
| 285 | write_buf = buf; |
| 286 | } else { |
| 287 | if (fwd_info->buf_1 && fwd_info->buf_1->data_raw == buf) { |
| 288 | temp_buf = fwd_info->buf_1; |
| 289 | } else if (fwd_info->buf_2 && |
| 290 | fwd_info->buf_2->data_raw == buf) { |
| 291 | temp_buf = fwd_info->buf_2; |
| 292 | } else { |
| 293 | pr_err("diag: In %s, no match for non encode buffer %pK, peripheral %d, type: %d\n", |
| 294 | __func__, buf, fwd_info->peripheral, |
| 295 | fwd_info->type); |
| 296 | goto end; |
| 297 | } |
| 298 | write_len = check_bufsize_for_encoding(temp_buf, len); |
| 299 | if (write_len <= 0) { |
| 300 | pr_err("diag: error in checking buf for encoding\n"); |
| 301 | goto end; |
| 302 | } |
| 303 | write_buf = temp_buf->data; |
| 304 | err = diag_add_hdlc_encoding(write_buf, &write_len, buf, len); |
| 305 | if (err) { |
| 306 | pr_err("diag: error in adding hdlc encoding\n"); |
| 307 | goto end; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | if (write_len > 0) { |
| 312 | err = diag_mux_write(DIAG_LOCAL_PROC, write_buf, write_len, |
| 313 | temp_buf->ctxt); |
| 314 | if (err) { |
| 315 | pr_err_ratelimited("diag: In %s, unable to write to mux error: %d\n", |
| 316 | __func__, err); |
| 317 | goto end; |
| 318 | } |
| 319 | } |
| 320 | mutex_unlock(&fwd_info->data_mutex); |
| 321 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 322 | diagfwd_queue_read(fwd_info); |
| 323 | return; |
| 324 | |
| 325 | end: |
| 326 | diag_ws_release(); |
| 327 | mutex_unlock(&fwd_info->data_mutex); |
| 328 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 329 | if (temp_buf) { |
| 330 | diagfwd_write_done(fwd_info->peripheral, fwd_info->type, |
| 331 | GET_BUF_NUM(temp_buf->ctxt)); |
| 332 | } |
| 333 | diagfwd_queue_read(fwd_info); |
| 334 | } |
| 335 | |
| 336 | static void diagfwd_cntl_read_done(struct diagfwd_info *fwd_info, |
| 337 | unsigned char *buf, int len) |
| 338 | { |
| 339 | if (!fwd_info) { |
| 340 | diag_ws_release(); |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | if (fwd_info->type != TYPE_CNTL) { |
| 345 | pr_err("diag: In %s, invalid type %d for peripheral %d\n", |
| 346 | __func__, fwd_info->type, fwd_info->peripheral); |
| 347 | diag_ws_release(); |
| 348 | return; |
| 349 | } |
| 350 | |
| 351 | diag_ws_on_read(DIAG_WS_MUX, len); |
| 352 | diag_cntl_process_read_data(fwd_info, buf, len); |
| 353 | /* |
| 354 | * Control packets are not consumed by the clients. Mimic |
| 355 | * consumption by setting and clearing the wakeup source copy_count |
| 356 | * explicitly. |
| 357 | */ |
| 358 | diag_ws_on_copy_fail(DIAG_WS_MUX); |
| 359 | /* Reset the buffer in_busy value after processing the data */ |
| 360 | if (fwd_info->buf_1) |
| 361 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 362 | |
| 363 | diagfwd_queue_read(fwd_info); |
| 364 | diagfwd_queue_read(&peripheral_info[TYPE_DATA][fwd_info->peripheral]); |
| 365 | diagfwd_queue_read(&peripheral_info[TYPE_CMD][fwd_info->peripheral]); |
| 366 | } |
| 367 | |
| 368 | static void diagfwd_dci_read_done(struct diagfwd_info *fwd_info, |
| 369 | unsigned char *buf, int len) |
| 370 | { |
| 371 | if (!fwd_info) |
| 372 | return; |
| 373 | |
| 374 | switch (fwd_info->type) { |
| 375 | case TYPE_DCI: |
| 376 | case TYPE_DCI_CMD: |
| 377 | break; |
| 378 | default: |
| 379 | pr_err("diag: In %s, invalid type %d for peripheral %d\n", |
| 380 | __func__, fwd_info->type, fwd_info->peripheral); |
| 381 | return; |
| 382 | } |
| 383 | |
| 384 | diag_dci_process_peripheral_data(fwd_info, (void *)buf, len); |
| 385 | /* Reset the buffer in_busy value after processing the data */ |
| 386 | if (fwd_info->buf_1) |
| 387 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 388 | |
| 389 | diagfwd_queue_read(fwd_info); |
| 390 | } |
| 391 | |
| 392 | static void diagfwd_reset_buffers(struct diagfwd_info *fwd_info, |
| 393 | unsigned char *buf) |
| 394 | { |
| 395 | if (!fwd_info || !buf) |
| 396 | return; |
| 397 | |
| 398 | if (!driver->feature[fwd_info->peripheral].encode_hdlc) { |
| 399 | if (fwd_info->buf_1 && fwd_info->buf_1->data == buf) |
| 400 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 401 | else if (fwd_info->buf_2 && fwd_info->buf_2->data == buf) |
| 402 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 403 | } else { |
| 404 | if (fwd_info->buf_1 && fwd_info->buf_1->data_raw == buf) |
| 405 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 406 | else if (fwd_info->buf_2 && fwd_info->buf_2->data_raw == buf) |
| 407 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | int diagfwd_peripheral_init(void) |
| 412 | { |
| 413 | uint8_t peripheral; |
| 414 | uint8_t transport; |
| 415 | uint8_t type; |
| 416 | struct diagfwd_info *fwd_info = NULL; |
| 417 | |
| 418 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 419 | early_init_info[transport] = kzalloc( |
| 420 | sizeof(struct diagfwd_info) * NUM_PERIPHERALS, |
| 421 | GFP_KERNEL); |
| 422 | if (!early_init_info[transport]) |
| 423 | return -ENOMEM; |
| 424 | kmemleak_not_leak(early_init_info[transport]); |
| 425 | } |
| 426 | |
| 427 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 428 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 429 | fwd_info = &early_init_info[transport][peripheral]; |
| 430 | fwd_info->peripheral = peripheral; |
| 431 | fwd_info->type = TYPE_CNTL; |
| 432 | fwd_info->transport = transport; |
| 433 | fwd_info->ctxt = NULL; |
| 434 | fwd_info->p_ops = NULL; |
| 435 | fwd_info->ch_open = 0; |
| 436 | fwd_info->inited = 1; |
| 437 | fwd_info->read_bytes = 0; |
| 438 | fwd_info->write_bytes = 0; |
| 439 | spin_lock_init(&fwd_info->buf_lock); |
| 440 | spin_lock_init(&fwd_info->write_buf_lock); |
| 441 | mutex_init(&fwd_info->data_mutex); |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 446 | for (type = 0; type < NUM_TYPES; type++) { |
| 447 | fwd_info = &peripheral_info[type][peripheral]; |
| 448 | fwd_info->peripheral = peripheral; |
| 449 | fwd_info->type = type; |
| 450 | fwd_info->ctxt = NULL; |
| 451 | fwd_info->p_ops = NULL; |
| 452 | fwd_info->ch_open = 0; |
| 453 | fwd_info->read_bytes = 0; |
| 454 | fwd_info->write_bytes = 0; |
| 455 | spin_lock_init(&fwd_info->buf_lock); |
| 456 | spin_lock_init(&fwd_info->write_buf_lock); |
| 457 | mutex_init(&fwd_info->data_mutex); |
| 458 | /* |
| 459 | * This state shouldn't be set for Control channels |
| 460 | * during initialization. This is set when the feature |
| 461 | * mask is received for the first time. |
| 462 | */ |
| 463 | if (type != TYPE_CNTL) |
| 464 | fwd_info->inited = 1; |
| 465 | } |
| 466 | driver->diagfwd_data[peripheral] = |
| 467 | &peripheral_info[TYPE_DATA][peripheral]; |
| 468 | driver->diagfwd_cntl[peripheral] = |
| 469 | &peripheral_info[TYPE_CNTL][peripheral]; |
| 470 | driver->diagfwd_dci[peripheral] = |
| 471 | &peripheral_info[TYPE_DCI][peripheral]; |
| 472 | driver->diagfwd_cmd[peripheral] = |
| 473 | &peripheral_info[TYPE_CMD][peripheral]; |
| 474 | driver->diagfwd_dci_cmd[peripheral] = |
| 475 | &peripheral_info[TYPE_DCI_CMD][peripheral]; |
| 476 | } |
| 477 | |
| 478 | if (driver->supports_sockets) |
| 479 | diag_socket_init(); |
| 480 | diag_glink_init(); |
| 481 | |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | void diagfwd_peripheral_exit(void) |
| 486 | { |
| 487 | uint8_t peripheral; |
| 488 | uint8_t type; |
| 489 | struct diagfwd_info *fwd_info = NULL; |
| 490 | |
| 491 | diag_socket_exit(); |
| 492 | |
| 493 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 494 | for (type = 0; type < NUM_TYPES; type++) { |
| 495 | fwd_info = &peripheral_info[type][peripheral]; |
| 496 | fwd_info->ctxt = NULL; |
| 497 | fwd_info->p_ops = NULL; |
| 498 | fwd_info->ch_open = 0; |
| 499 | diagfwd_buffers_exit(fwd_info); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 504 | driver->diagfwd_data[peripheral] = NULL; |
| 505 | driver->diagfwd_cntl[peripheral] = NULL; |
| 506 | driver->diagfwd_dci[peripheral] = NULL; |
| 507 | driver->diagfwd_cmd[peripheral] = NULL; |
| 508 | driver->diagfwd_dci_cmd[peripheral] = NULL; |
| 509 | } |
| 510 | |
| 511 | kfree(early_init_info); |
| 512 | } |
| 513 | |
| 514 | int diagfwd_cntl_register(uint8_t transport, uint8_t peripheral, void *ctxt, |
| 515 | struct diag_peripheral_ops *ops, |
| 516 | struct diagfwd_info **fwd_ctxt) |
| 517 | { |
| 518 | struct diagfwd_info *fwd_info = NULL; |
| 519 | |
| 520 | if (!ctxt || !ops) |
| 521 | return -EIO; |
| 522 | |
| 523 | if (transport >= NUM_TRANSPORT || peripheral >= NUM_PERIPHERALS) |
| 524 | return -EINVAL; |
| 525 | |
| 526 | fwd_info = &early_init_info[transport][peripheral]; |
| 527 | *fwd_ctxt = &early_init_info[transport][peripheral]; |
| 528 | fwd_info->ctxt = ctxt; |
| 529 | fwd_info->p_ops = ops; |
| 530 | fwd_info->c_ops = &cntl_ch_ops; |
| 531 | |
| 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | int diagfwd_register(uint8_t transport, uint8_t peripheral, uint8_t type, |
| 536 | void *ctxt, struct diag_peripheral_ops *ops, |
| 537 | struct diagfwd_info **fwd_ctxt) |
| 538 | { |
| 539 | struct diagfwd_info *fwd_info = NULL; |
| 540 | |
| 541 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES || |
| 542 | !ctxt || !ops || transport >= NUM_TRANSPORT) { |
| 543 | pr_err("diag: In %s, returning error\n", __func__); |
| 544 | return -EIO; |
| 545 | } |
| 546 | |
| 547 | fwd_info = &peripheral_info[type][peripheral]; |
| 548 | *fwd_ctxt = &peripheral_info[type][peripheral]; |
| 549 | fwd_info->ctxt = ctxt; |
| 550 | fwd_info->p_ops = ops; |
| 551 | fwd_info->transport = transport; |
| 552 | fwd_info->ch_open = 0; |
| 553 | |
| 554 | switch (type) { |
| 555 | case TYPE_DATA: |
| 556 | case TYPE_CMD: |
| 557 | fwd_info->c_ops = &data_ch_ops; |
| 558 | break; |
| 559 | case TYPE_DCI: |
| 560 | case TYPE_DCI_CMD: |
| 561 | fwd_info->c_ops = &dci_ch_ops; |
| 562 | break; |
| 563 | default: |
| 564 | pr_err("diag: In %s, invalid type: %d\n", __func__, type); |
| 565 | return -EINVAL; |
| 566 | } |
| 567 | |
| 568 | if (atomic_read(&fwd_info->opened) && |
| 569 | fwd_info->p_ops && fwd_info->p_ops->open) { |
| 570 | /* |
| 571 | * The registration can happen late, like in the case of |
| 572 | * sockets. fwd_info->opened reflects diag_state. Propagate the |
| 573 | * state to the peipherals. |
| 574 | */ |
| 575 | fwd_info->p_ops->open(fwd_info->ctxt); |
| 576 | } |
| 577 | |
| 578 | return 0; |
| 579 | } |
| 580 | |
| 581 | void diagfwd_deregister(uint8_t peripheral, uint8_t type, void *ctxt) |
| 582 | { |
| 583 | struct diagfwd_info *fwd_info = NULL; |
| 584 | |
| 585 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES || !ctxt) |
| 586 | return; |
| 587 | |
| 588 | fwd_info = &peripheral_info[type][peripheral]; |
| 589 | if (fwd_info->ctxt != ctxt) { |
| 590 | pr_err("diag: In %s, unable to find a match for p: %d t: %d\n", |
| 591 | __func__, peripheral, type); |
| 592 | return; |
| 593 | } |
| 594 | fwd_info->ctxt = NULL; |
| 595 | fwd_info->p_ops = NULL; |
| 596 | fwd_info->ch_open = 0; |
| 597 | diagfwd_buffers_exit(fwd_info); |
| 598 | |
| 599 | switch (type) { |
| 600 | case TYPE_DATA: |
| 601 | driver->diagfwd_data[peripheral] = NULL; |
| 602 | break; |
| 603 | case TYPE_CNTL: |
| 604 | driver->diagfwd_cntl[peripheral] = NULL; |
| 605 | break; |
| 606 | case TYPE_DCI: |
| 607 | driver->diagfwd_dci[peripheral] = NULL; |
| 608 | break; |
| 609 | case TYPE_CMD: |
| 610 | driver->diagfwd_cmd[peripheral] = NULL; |
| 611 | break; |
| 612 | case TYPE_DCI_CMD: |
| 613 | driver->diagfwd_dci_cmd[peripheral] = NULL; |
| 614 | break; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | void diagfwd_close_transport(uint8_t transport, uint8_t peripheral) |
| 619 | { |
| 620 | struct diagfwd_info *fwd_info = NULL; |
| 621 | struct diagfwd_info *dest_info = NULL; |
| 622 | int (*init_fn)(uint8_t) = NULL; |
| 623 | void (*invalidate_fn)(void *, struct diagfwd_info *) = NULL; |
| 624 | int (*check_channel_state)(void *) = NULL; |
| 625 | uint8_t transport_open = 0; |
| 626 | int i = 0; |
| 627 | |
| 628 | if (peripheral >= NUM_PERIPHERALS) |
| 629 | return; |
| 630 | |
| 631 | switch (transport) { |
| 632 | case TRANSPORT_GLINK: |
| 633 | transport_open = TRANSPORT_SOCKET; |
| 634 | init_fn = diag_socket_init_peripheral; |
| 635 | invalidate_fn = diag_socket_invalidate; |
| 636 | check_channel_state = diag_socket_check_state; |
| 637 | break; |
| 638 | case TRANSPORT_SOCKET: |
| 639 | transport_open = TRANSPORT_GLINK; |
| 640 | init_fn = diag_glink_init_peripheral; |
| 641 | invalidate_fn = diag_glink_invalidate; |
| 642 | check_channel_state = diag_glink_check_state; |
| 643 | break; |
| 644 | default: |
| 645 | return; |
| 646 | |
| 647 | } |
| 648 | |
| 649 | mutex_lock(&driver->diagfwd_channel_mutex); |
| 650 | fwd_info = &early_init_info[transport][peripheral]; |
| 651 | if (fwd_info->p_ops && fwd_info->p_ops->close) |
| 652 | fwd_info->p_ops->close(fwd_info->ctxt); |
| 653 | fwd_info = &early_init_info[transport_open][peripheral]; |
| 654 | dest_info = &peripheral_info[TYPE_CNTL][peripheral]; |
| 655 | dest_info->inited = 1; |
| 656 | dest_info->ctxt = fwd_info->ctxt; |
| 657 | dest_info->p_ops = fwd_info->p_ops; |
| 658 | dest_info->c_ops = fwd_info->c_ops; |
| 659 | dest_info->ch_open = fwd_info->ch_open; |
| 660 | dest_info->read_bytes = fwd_info->read_bytes; |
| 661 | dest_info->write_bytes = fwd_info->write_bytes; |
| 662 | dest_info->inited = fwd_info->inited; |
| 663 | dest_info->buf_1 = fwd_info->buf_1; |
| 664 | dest_info->buf_2 = fwd_info->buf_2; |
| 665 | dest_info->transport = fwd_info->transport; |
| 666 | invalidate_fn(dest_info->ctxt, dest_info); |
| 667 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) |
| 668 | dest_info->buf_ptr[i] = fwd_info->buf_ptr[i]; |
| 669 | if (!check_channel_state(dest_info->ctxt)) |
| 670 | diagfwd_late_open(dest_info); |
| 671 | diagfwd_cntl_open(dest_info); |
| 672 | init_fn(peripheral); |
| 673 | mutex_unlock(&driver->diagfwd_channel_mutex); |
| 674 | diagfwd_queue_read(&peripheral_info[TYPE_DATA][peripheral]); |
| 675 | diagfwd_queue_read(&peripheral_info[TYPE_CMD][peripheral]); |
| 676 | } |
| 677 | |
| 678 | void *diagfwd_request_write_buf(struct diagfwd_info *fwd_info) |
| 679 | { |
| 680 | void *buf = NULL; |
| 681 | int index; |
| 682 | unsigned long flags; |
| 683 | |
| 684 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 685 | for (index = 0 ; index < NUM_WRITE_BUFFERS; index++) { |
| 686 | if (!atomic_read(&(fwd_info->buf_ptr[index]->in_busy))) { |
| 687 | atomic_set(&(fwd_info->buf_ptr[index]->in_busy), 1); |
| 688 | buf = fwd_info->buf_ptr[index]->data; |
| 689 | if (!buf) |
| 690 | return NULL; |
| 691 | break; |
| 692 | } |
| 693 | } |
| 694 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 695 | return buf; |
| 696 | } |
| 697 | |
| 698 | int diagfwd_write(uint8_t peripheral, uint8_t type, void *buf, int len) |
| 699 | { |
| 700 | struct diagfwd_info *fwd_info = NULL; |
| 701 | int err = 0; |
| 702 | uint8_t retry_count = 0; |
| 703 | uint8_t max_retries = 3; |
| 704 | void *buf_ptr = NULL; |
| 705 | |
| 706 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 707 | return -EINVAL; |
| 708 | |
| 709 | if (type == TYPE_CMD || type == TYPE_DCI_CMD) { |
| 710 | if (!driver->feature[peripheral].rcvd_feature_mask || |
| 711 | !driver->feature[peripheral].sent_feature_mask) { |
| 712 | pr_debug_ratelimited("diag: In %s, feature mask for peripheral: %d not received or sent yet\n", |
| 713 | __func__, peripheral); |
| 714 | return 0; |
| 715 | } |
| 716 | if (!driver->feature[peripheral].separate_cmd_rsp) |
| 717 | type = (type == TYPE_CMD) ? TYPE_DATA : TYPE_DCI; |
| 718 | } |
| 719 | |
| 720 | fwd_info = &peripheral_info[type][peripheral]; |
| 721 | if (!fwd_info->inited || !atomic_read(&fwd_info->opened)) |
| 722 | return -ENODEV; |
| 723 | |
| 724 | if (!(fwd_info->p_ops && fwd_info->p_ops->write && fwd_info->ctxt)) |
| 725 | return -EIO; |
| 726 | |
| 727 | if (fwd_info->transport == TRANSPORT_GLINK) { |
| 728 | buf_ptr = diagfwd_request_write_buf(fwd_info); |
| 729 | if (buf_ptr) |
| 730 | memcpy(buf_ptr, buf, len); |
| 731 | else { |
| 732 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 733 | "diag: buffer not found for writing\n"); |
| 734 | return -EIO; |
| 735 | } |
| 736 | } else |
| 737 | buf_ptr = buf; |
| 738 | |
| 739 | while (retry_count < max_retries) { |
| 740 | err = 0; |
| 741 | err = fwd_info->p_ops->write(fwd_info->ctxt, buf_ptr, len); |
| 742 | if (err && err != -ENODEV) { |
| 743 | usleep_range(100000, 101000); |
| 744 | retry_count++; |
| 745 | continue; |
| 746 | } |
| 747 | break; |
| 748 | } |
| 749 | |
| 750 | if (!err) |
| 751 | fwd_info->write_bytes += len; |
| 752 | else |
| 753 | if (fwd_info->transport == TRANSPORT_GLINK) |
| 754 | diagfwd_write_buffer_done(fwd_info, buf_ptr); |
| 755 | return err; |
| 756 | } |
| 757 | |
| 758 | static void __diag_fwd_open(struct diagfwd_info *fwd_info) |
| 759 | { |
| 760 | if (!fwd_info) |
| 761 | return; |
| 762 | |
| 763 | atomic_set(&fwd_info->opened, 1); |
| 764 | if (!fwd_info->inited) |
| 765 | return; |
| 766 | |
| 767 | if (fwd_info->buf_1) |
| 768 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 769 | if (fwd_info->buf_2) |
| 770 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 771 | |
| 772 | if (fwd_info->p_ops && fwd_info->p_ops->open) |
| 773 | fwd_info->p_ops->open(fwd_info->ctxt); |
| 774 | |
| 775 | diagfwd_queue_read(fwd_info); |
| 776 | } |
| 777 | |
| 778 | void diagfwd_early_open(uint8_t peripheral) |
| 779 | { |
| 780 | uint8_t transport = 0; |
| 781 | struct diagfwd_info *fwd_info = NULL; |
| 782 | |
| 783 | if (peripheral >= NUM_PERIPHERALS) |
| 784 | return; |
| 785 | |
| 786 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 787 | fwd_info = &early_init_info[transport][peripheral]; |
| 788 | __diag_fwd_open(fwd_info); |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | void diagfwd_open(uint8_t peripheral, uint8_t type) |
| 793 | { |
| 794 | struct diagfwd_info *fwd_info = NULL; |
| 795 | |
| 796 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 797 | return; |
| 798 | |
| 799 | fwd_info = &peripheral_info[type][peripheral]; |
| 800 | __diag_fwd_open(fwd_info); |
| 801 | } |
| 802 | |
| 803 | void diagfwd_late_open(struct diagfwd_info *fwd_info) |
| 804 | { |
| 805 | __diag_fwd_open(fwd_info); |
| 806 | } |
| 807 | |
| 808 | void diagfwd_close(uint8_t peripheral, uint8_t type) |
| 809 | { |
| 810 | struct diagfwd_info *fwd_info = NULL; |
| 811 | |
| 812 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 813 | return; |
| 814 | |
| 815 | fwd_info = &peripheral_info[type][peripheral]; |
| 816 | atomic_set(&fwd_info->opened, 0); |
| 817 | if (!fwd_info->inited) |
| 818 | return; |
| 819 | |
| 820 | if (fwd_info->p_ops && fwd_info->p_ops->close) |
| 821 | fwd_info->p_ops->close(fwd_info->ctxt); |
| 822 | |
| 823 | if (fwd_info->buf_1) |
| 824 | atomic_set(&fwd_info->buf_1->in_busy, 1); |
| 825 | /* |
| 826 | * Only Data channels have two buffers. Set both the buffers |
| 827 | * to busy on close. |
| 828 | */ |
| 829 | if (fwd_info->buf_2) |
| 830 | atomic_set(&fwd_info->buf_2->in_busy, 1); |
| 831 | } |
| 832 | |
| 833 | int diagfwd_channel_open(struct diagfwd_info *fwd_info) |
| 834 | { |
| 835 | int i; |
| 836 | |
| 837 | if (!fwd_info) |
| 838 | return -EIO; |
| 839 | |
| 840 | if (!fwd_info->inited) { |
| 841 | pr_debug("diag: In %s, channel is not inited, p: %d, t: %d\n", |
| 842 | __func__, fwd_info->peripheral, fwd_info->type); |
| 843 | return -EINVAL; |
| 844 | } |
| 845 | |
| 846 | if (fwd_info->ch_open) { |
| 847 | pr_debug("diag: In %s, channel is already open, p: %d, t: %d\n", |
| 848 | __func__, fwd_info->peripheral, fwd_info->type); |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | fwd_info->ch_open = 1; |
| 853 | diagfwd_buffers_init(fwd_info); |
| 854 | diagfwd_write_buffers_init(fwd_info); |
| 855 | if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->open) |
| 856 | fwd_info->c_ops->open(fwd_info); |
| 857 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 858 | if (fwd_info->buf_ptr[i]) |
| 859 | atomic_set(&fwd_info->buf_ptr[i]->in_busy, 0); |
| 860 | } |
| 861 | diagfwd_queue_read(fwd_info); |
| 862 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "p: %d t: %d considered opened\n", |
| 863 | fwd_info->peripheral, fwd_info->type); |
| 864 | |
| 865 | if (atomic_read(&fwd_info->opened)) { |
| 866 | if (fwd_info->p_ops && fwd_info->p_ops->open) |
| 867 | fwd_info->p_ops->open(fwd_info->ctxt); |
| 868 | } |
| 869 | |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | int diagfwd_channel_close(struct diagfwd_info *fwd_info) |
| 874 | { |
| 875 | int i; |
| 876 | |
| 877 | if (!fwd_info) |
| 878 | return -EIO; |
| 879 | |
| 880 | fwd_info->ch_open = 0; |
| 881 | if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->close) |
| 882 | fwd_info->c_ops->close(fwd_info); |
| 883 | |
| 884 | if (fwd_info->buf_1 && fwd_info->buf_1->data) |
| 885 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 886 | if (fwd_info->buf_2 && fwd_info->buf_2->data) |
| 887 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 888 | |
| 889 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 890 | if (fwd_info->buf_ptr[i]) |
| 891 | atomic_set(&fwd_info->buf_ptr[i]->in_busy, 1); |
| 892 | } |
| 893 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "p: %d t: %d considered closed\n", |
| 894 | fwd_info->peripheral, fwd_info->type); |
| 895 | |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | int diagfwd_channel_read_done(struct diagfwd_info *fwd_info, |
| 900 | unsigned char *buf, uint32_t len) |
| 901 | { |
| 902 | if (!fwd_info) { |
| 903 | diag_ws_release(); |
| 904 | return -EIO; |
| 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Diag peripheral layers should send len as 0 if there is any error |
| 909 | * in reading data from the transport. Use this information to reset the |
| 910 | * in_busy flags. No need to queue read in this case. |
| 911 | */ |
| 912 | if (len == 0) { |
| 913 | diagfwd_reset_buffers(fwd_info, buf); |
| 914 | diag_ws_release(); |
| 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->read_done) |
| 919 | fwd_info->c_ops->read_done(fwd_info, buf, len); |
| 920 | fwd_info->read_bytes += len; |
| 921 | |
| 922 | return 0; |
| 923 | } |
| 924 | |
| 925 | void diagfwd_write_done(uint8_t peripheral, uint8_t type, int ctxt) |
| 926 | { |
| 927 | struct diagfwd_info *fwd_info = NULL; |
| 928 | |
| 929 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 930 | return; |
| 931 | |
| 932 | fwd_info = &peripheral_info[type][peripheral]; |
| 933 | if (ctxt == 1 && fwd_info->buf_1) |
| 934 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 935 | else if (ctxt == 2 && fwd_info->buf_2) |
| 936 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 937 | else |
| 938 | pr_err("diag: In %s, invalid ctxt %d\n", __func__, ctxt); |
| 939 | |
| 940 | diagfwd_queue_read(fwd_info); |
| 941 | } |
| 942 | |
| 943 | int diagfwd_write_buffer_done(struct diagfwd_info *fwd_info, const void *ptr) |
| 944 | { |
| 945 | |
| 946 | int found = 0; |
| 947 | int index = 0; |
| 948 | unsigned long flags; |
| 949 | |
| 950 | if (!fwd_info || !ptr) |
| 951 | return found; |
| 952 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 953 | for (index = 0; index < NUM_WRITE_BUFFERS; index++) { |
| 954 | if (fwd_info->buf_ptr[index]->data == ptr) { |
| 955 | atomic_set(&fwd_info->buf_ptr[index]->in_busy, 0); |
| 956 | found = 1; |
| 957 | break; |
| 958 | } |
| 959 | } |
| 960 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 961 | return found; |
| 962 | } |
| 963 | |
| 964 | void diagfwd_channel_read(struct diagfwd_info *fwd_info) |
| 965 | { |
| 966 | int err = 0; |
| 967 | uint32_t read_len = 0; |
| 968 | unsigned char *read_buf = NULL; |
| 969 | struct diagfwd_buf_t *temp_buf = NULL; |
| 970 | |
| 971 | if (!fwd_info) { |
| 972 | diag_ws_release(); |
| 973 | return; |
| 974 | } |
| 975 | |
| 976 | if (!fwd_info->inited || !atomic_read(&fwd_info->opened)) { |
| 977 | pr_debug("diag: In %s, p: %d, t: %d, inited: %d, opened: %d ch_open: %d\n", |
| 978 | __func__, fwd_info->peripheral, fwd_info->type, |
| 979 | fwd_info->inited, atomic_read(&fwd_info->opened), |
| 980 | fwd_info->ch_open); |
| 981 | diag_ws_release(); |
| 982 | return; |
| 983 | } |
| 984 | |
| 985 | if (fwd_info->buf_1 && !atomic_read(&fwd_info->buf_1->in_busy)) { |
| 986 | temp_buf = fwd_info->buf_1; |
| 987 | atomic_set(&temp_buf->in_busy, 1); |
| 988 | if (driver->feature[fwd_info->peripheral].encode_hdlc && |
| 989 | (fwd_info->type == TYPE_DATA || |
| 990 | fwd_info->type == TYPE_CMD)) { |
| 991 | read_buf = fwd_info->buf_1->data_raw; |
| 992 | read_len = fwd_info->buf_1->len_raw; |
| 993 | } else { |
| 994 | read_buf = fwd_info->buf_1->data; |
| 995 | read_len = fwd_info->buf_1->len; |
| 996 | } |
| 997 | } else if (fwd_info->buf_2 && !atomic_read(&fwd_info->buf_2->in_busy)) { |
| 998 | temp_buf = fwd_info->buf_2; |
| 999 | atomic_set(&temp_buf->in_busy, 1); |
| 1000 | if (driver->feature[fwd_info->peripheral].encode_hdlc && |
| 1001 | (fwd_info->type == TYPE_DATA || |
| 1002 | fwd_info->type == TYPE_CMD)) { |
| 1003 | read_buf = fwd_info->buf_2->data_raw; |
| 1004 | read_len = fwd_info->buf_2->len_raw; |
| 1005 | } else { |
| 1006 | read_buf = fwd_info->buf_2->data; |
| 1007 | read_len = fwd_info->buf_2->len; |
| 1008 | } |
| 1009 | } else { |
| 1010 | pr_debug("diag: In %s, both buffers are empty for p: %d, t: %d\n", |
| 1011 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1012 | } |
| 1013 | |
| 1014 | if (!read_buf) { |
| 1015 | diag_ws_release(); |
| 1016 | return; |
| 1017 | } |
| 1018 | |
| 1019 | if (!(fwd_info->p_ops && fwd_info->p_ops->read && fwd_info->ctxt)) |
| 1020 | goto fail_return; |
| 1021 | |
| 1022 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "issued a read p: %d t: %d buf: %pK\n", |
| 1023 | fwd_info->peripheral, fwd_info->type, read_buf); |
| 1024 | err = fwd_info->p_ops->read(fwd_info->ctxt, read_buf, read_len); |
| 1025 | if (err) |
| 1026 | goto fail_return; |
| 1027 | |
| 1028 | return; |
| 1029 | |
| 1030 | fail_return: |
| 1031 | diag_ws_release(); |
| 1032 | atomic_set(&temp_buf->in_busy, 0); |
| 1033 | } |
| 1034 | |
| 1035 | static void diagfwd_queue_read(struct diagfwd_info *fwd_info) |
| 1036 | { |
| 1037 | if (!fwd_info) |
| 1038 | return; |
| 1039 | |
| 1040 | if (!fwd_info->inited || !atomic_read(&fwd_info->opened)) { |
| 1041 | pr_debug("diag: In %s, p: %d, t: %d, inited: %d, opened: %d ch_open: %d\n", |
| 1042 | __func__, fwd_info->peripheral, fwd_info->type, |
| 1043 | fwd_info->inited, atomic_read(&fwd_info->opened), |
| 1044 | fwd_info->ch_open); |
| 1045 | return; |
| 1046 | } |
| 1047 | |
| 1048 | /* |
| 1049 | * Don't queue a read on the data and command channels before receiving |
| 1050 | * the feature mask from the peripheral. We won't know which buffer to |
| 1051 | * use - HDLC or non HDLC buffer for reading. |
| 1052 | */ |
| 1053 | if ((!driver->feature[fwd_info->peripheral].rcvd_feature_mask) && |
| 1054 | (fwd_info->type != TYPE_CNTL)) { |
| 1055 | return; |
| 1056 | } |
| 1057 | |
| 1058 | if (fwd_info->p_ops && fwd_info->p_ops->queue_read && fwd_info->ctxt) |
| 1059 | fwd_info->p_ops->queue_read(fwd_info->ctxt); |
| 1060 | } |
| 1061 | |
| 1062 | void diagfwd_buffers_init(struct diagfwd_info *fwd_info) |
| 1063 | { |
| 1064 | unsigned long flags; |
| 1065 | |
| 1066 | if (!fwd_info) |
| 1067 | return; |
| 1068 | |
| 1069 | if (!fwd_info->inited) { |
| 1070 | pr_err("diag: In %s, channel not inited, p: %d, t: %d\n", |
| 1071 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1072 | return; |
| 1073 | } |
| 1074 | |
| 1075 | spin_lock_irqsave(&fwd_info->buf_lock, flags); |
| 1076 | if (!fwd_info->buf_1) { |
| 1077 | fwd_info->buf_1 = kzalloc(sizeof(struct diagfwd_buf_t), |
| 1078 | GFP_ATOMIC); |
| 1079 | if (!fwd_info->buf_1) |
| 1080 | goto err; |
| 1081 | kmemleak_not_leak(fwd_info->buf_1); |
| 1082 | } |
| 1083 | if (!fwd_info->buf_1->data) { |
| 1084 | fwd_info->buf_1->data = kzalloc(PERIPHERAL_BUF_SZ + |
| 1085 | APF_DIAG_PADDING, |
| 1086 | GFP_ATOMIC); |
| 1087 | if (!fwd_info->buf_1->data) |
| 1088 | goto err; |
| 1089 | fwd_info->buf_1->len = PERIPHERAL_BUF_SZ; |
| 1090 | kmemleak_not_leak(fwd_info->buf_1->data); |
| 1091 | fwd_info->buf_1->ctxt = SET_BUF_CTXT(fwd_info->peripheral, |
| 1092 | fwd_info->type, 1); |
| 1093 | } |
| 1094 | |
| 1095 | if (fwd_info->type == TYPE_DATA) { |
| 1096 | if (!fwd_info->buf_2) { |
| 1097 | fwd_info->buf_2 = kzalloc(sizeof(struct diagfwd_buf_t), |
| 1098 | GFP_ATOMIC); |
| 1099 | if (!fwd_info->buf_2) |
| 1100 | goto err; |
| 1101 | kmemleak_not_leak(fwd_info->buf_2); |
| 1102 | } |
| 1103 | |
| 1104 | if (!fwd_info->buf_2->data) { |
| 1105 | fwd_info->buf_2->data = kzalloc(PERIPHERAL_BUF_SZ + |
| 1106 | APF_DIAG_PADDING, |
| 1107 | GFP_ATOMIC); |
| 1108 | if (!fwd_info->buf_2->data) |
| 1109 | goto err; |
| 1110 | fwd_info->buf_2->len = PERIPHERAL_BUF_SZ; |
| 1111 | kmemleak_not_leak(fwd_info->buf_2->data); |
| 1112 | fwd_info->buf_2->ctxt = SET_BUF_CTXT( |
| 1113 | fwd_info->peripheral, |
| 1114 | fwd_info->type, 2); |
| 1115 | } |
| 1116 | |
| 1117 | if (driver->supports_apps_hdlc_encoding) { |
| 1118 | /* In support of hdlc encoding */ |
| 1119 | if (!fwd_info->buf_1->data_raw) { |
| 1120 | fwd_info->buf_1->data_raw = |
| 1121 | kzalloc(PERIPHERAL_BUF_SZ + |
| 1122 | APF_DIAG_PADDING, |
| 1123 | GFP_ATOMIC); |
| 1124 | if (!fwd_info->buf_1->data_raw) |
| 1125 | goto err; |
| 1126 | fwd_info->buf_1->len_raw = PERIPHERAL_BUF_SZ; |
| 1127 | kmemleak_not_leak(fwd_info->buf_1->data_raw); |
| 1128 | } |
| 1129 | if (!fwd_info->buf_2->data_raw) { |
| 1130 | fwd_info->buf_2->data_raw = |
| 1131 | kzalloc(PERIPHERAL_BUF_SZ + |
| 1132 | APF_DIAG_PADDING, |
| 1133 | GFP_ATOMIC); |
| 1134 | if (!fwd_info->buf_2->data_raw) |
| 1135 | goto err; |
| 1136 | fwd_info->buf_2->len_raw = PERIPHERAL_BUF_SZ; |
| 1137 | kmemleak_not_leak(fwd_info->buf_2->data_raw); |
| 1138 | } |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | if (fwd_info->type == TYPE_CMD && driver->supports_apps_hdlc_encoding) { |
| 1143 | /* In support of hdlc encoding */ |
| 1144 | if (!fwd_info->buf_1->data_raw) { |
| 1145 | fwd_info->buf_1->data_raw = kzalloc(PERIPHERAL_BUF_SZ + |
| 1146 | APF_DIAG_PADDING, |
| 1147 | GFP_ATOMIC); |
| 1148 | if (!fwd_info->buf_1->data_raw) |
| 1149 | goto err; |
| 1150 | fwd_info->buf_1->len_raw = PERIPHERAL_BUF_SZ; |
| 1151 | kmemleak_not_leak(fwd_info->buf_1->data_raw); |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | spin_unlock_irqrestore(&fwd_info->buf_lock, flags); |
| 1156 | return; |
| 1157 | |
| 1158 | err: |
| 1159 | spin_unlock_irqrestore(&fwd_info->buf_lock, flags); |
| 1160 | diagfwd_buffers_exit(fwd_info); |
| 1161 | } |
| 1162 | |
| 1163 | static void diagfwd_buffers_exit(struct diagfwd_info *fwd_info) |
| 1164 | { |
| 1165 | unsigned long flags; |
| 1166 | |
| 1167 | if (!fwd_info) |
| 1168 | return; |
| 1169 | |
| 1170 | spin_lock_irqsave(&fwd_info->buf_lock, flags); |
| 1171 | if (fwd_info->buf_1) { |
| 1172 | kfree(fwd_info->buf_1->data); |
| 1173 | fwd_info->buf_1->data = NULL; |
| 1174 | kfree(fwd_info->buf_1->data_raw); |
| 1175 | fwd_info->buf_1->data_raw = NULL; |
| 1176 | kfree(fwd_info->buf_1); |
| 1177 | fwd_info->buf_1 = NULL; |
| 1178 | } |
| 1179 | if (fwd_info->buf_2) { |
| 1180 | kfree(fwd_info->buf_2->data); |
| 1181 | fwd_info->buf_2->data = NULL; |
| 1182 | kfree(fwd_info->buf_2->data_raw); |
| 1183 | fwd_info->buf_2->data_raw = NULL; |
| 1184 | kfree(fwd_info->buf_2); |
| 1185 | fwd_info->buf_2 = NULL; |
| 1186 | } |
| 1187 | spin_unlock_irqrestore(&fwd_info->buf_lock, flags); |
| 1188 | } |
| 1189 | |
| 1190 | void diagfwd_write_buffers_init(struct diagfwd_info *fwd_info) |
| 1191 | { |
| 1192 | unsigned long flags; |
| 1193 | int i; |
| 1194 | |
| 1195 | if (!fwd_info) |
| 1196 | return; |
| 1197 | |
| 1198 | if (!fwd_info->inited) { |
| 1199 | pr_err("diag: In %s, channel not inited, p: %d, t: %d\n", |
| 1200 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1201 | return; |
| 1202 | } |
| 1203 | |
| 1204 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 1205 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 1206 | if (!fwd_info->buf_ptr[i]) |
| 1207 | fwd_info->buf_ptr[i] = |
| 1208 | kzalloc(sizeof(struct diagfwd_buf_t), |
| 1209 | GFP_ATOMIC); |
| 1210 | if (!fwd_info->buf_ptr[i]) |
| 1211 | goto err; |
| 1212 | kmemleak_not_leak(fwd_info->buf_ptr[i]); |
| 1213 | if (!fwd_info->buf_ptr[i]->data) { |
| 1214 | fwd_info->buf_ptr[i]->data = kzalloc(PERIPHERAL_BUF_SZ, |
| 1215 | GFP_ATOMIC); |
| 1216 | if (!fwd_info->buf_ptr[i]->data) |
| 1217 | goto err; |
| 1218 | fwd_info->buf_ptr[i]->len = PERIPHERAL_BUF_SZ; |
| 1219 | kmemleak_not_leak(fwd_info->buf_ptr[i]->data); |
| 1220 | } |
| 1221 | } |
| 1222 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1223 | return; |
| 1224 | |
| 1225 | err: |
| 1226 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1227 | pr_err("diag:unable to allocate write buffers\n"); |
| 1228 | diagfwd_write_buffers_exit(fwd_info); |
| 1229 | |
| 1230 | } |
| 1231 | |
| 1232 | static void diagfwd_write_buffers_exit(struct diagfwd_info *fwd_info) |
| 1233 | { |
| 1234 | unsigned long flags; |
| 1235 | int i; |
| 1236 | |
| 1237 | if (!fwd_info) |
| 1238 | return; |
| 1239 | |
| 1240 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 1241 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 1242 | if (fwd_info->buf_ptr[i]) { |
| 1243 | kfree(fwd_info->buf_ptr[i]->data); |
| 1244 | fwd_info->buf_ptr[i]->data = NULL; |
| 1245 | kfree(fwd_info->buf_ptr[i]); |
| 1246 | fwd_info->buf_ptr[i] = NULL; |
| 1247 | } |
| 1248 | } |
| 1249 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1250 | } |