Manoj Prabhu B | 9832546 | 2017-01-10 20:19:28 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved. |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 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" |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 33 | #include "diag_memorydevice.h" |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 34 | |
| 35 | struct data_header { |
| 36 | uint8_t control_char; |
| 37 | uint8_t version; |
| 38 | uint16_t length; |
| 39 | }; |
| 40 | |
| 41 | static struct diagfwd_info *early_init_info[NUM_TRANSPORT]; |
| 42 | |
| 43 | static void diagfwd_queue_read(struct diagfwd_info *fwd_info); |
| 44 | static void diagfwd_buffers_exit(struct diagfwd_info *fwd_info); |
| 45 | static void diagfwd_cntl_open(struct diagfwd_info *fwd_info); |
| 46 | static void diagfwd_cntl_close(struct diagfwd_info *fwd_info); |
| 47 | static void diagfwd_dci_open(struct diagfwd_info *fwd_info); |
| 48 | static void diagfwd_dci_close(struct diagfwd_info *fwd_info); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 49 | static void diagfwd_data_read_untag_done(struct diagfwd_info *fwd_info, |
| 50 | unsigned char *buf, int len); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 51 | static void diagfwd_data_read_done(struct diagfwd_info *fwd_info, |
| 52 | unsigned char *buf, int len); |
| 53 | static void diagfwd_cntl_read_done(struct diagfwd_info *fwd_info, |
| 54 | unsigned char *buf, int len); |
| 55 | static void diagfwd_dci_read_done(struct diagfwd_info *fwd_info, |
| 56 | unsigned char *buf, int len); |
| 57 | static void diagfwd_write_buffers_init(struct diagfwd_info *fwd_info); |
| 58 | static void diagfwd_write_buffers_exit(struct diagfwd_info *fwd_info); |
| 59 | struct diagfwd_info peripheral_info[NUM_TYPES][NUM_PERIPHERALS]; |
| 60 | |
| 61 | static struct diag_channel_ops data_ch_ops = { |
| 62 | .open = NULL, |
| 63 | .close = NULL, |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 64 | .read_done = diagfwd_data_read_untag_done |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | static struct diag_channel_ops cntl_ch_ops = { |
| 68 | .open = diagfwd_cntl_open, |
| 69 | .close = diagfwd_cntl_close, |
| 70 | .read_done = diagfwd_cntl_read_done |
| 71 | }; |
| 72 | |
| 73 | static struct diag_channel_ops dci_ch_ops = { |
| 74 | .open = diagfwd_dci_open, |
| 75 | .close = diagfwd_dci_close, |
| 76 | .read_done = diagfwd_dci_read_done |
| 77 | }; |
| 78 | |
| 79 | static void diagfwd_cntl_open(struct diagfwd_info *fwd_info) |
| 80 | { |
| 81 | if (!fwd_info) |
| 82 | return; |
| 83 | diag_cntl_channel_open(fwd_info); |
| 84 | } |
| 85 | |
| 86 | static void diagfwd_cntl_close(struct diagfwd_info *fwd_info) |
| 87 | { |
| 88 | if (!fwd_info) |
| 89 | return; |
| 90 | diag_cntl_channel_close(fwd_info); |
| 91 | } |
| 92 | |
| 93 | static void diagfwd_dci_open(struct diagfwd_info *fwd_info) |
| 94 | { |
| 95 | if (!fwd_info) |
| 96 | return; |
| 97 | |
| 98 | diag_dci_notify_client(PERIPHERAL_MASK(fwd_info->peripheral), |
| 99 | DIAG_STATUS_OPEN, DCI_LOCAL_PROC); |
| 100 | } |
| 101 | |
| 102 | static void diagfwd_dci_close(struct diagfwd_info *fwd_info) |
| 103 | { |
| 104 | if (!fwd_info) |
| 105 | return; |
| 106 | |
| 107 | diag_dci_notify_client(PERIPHERAL_MASK(fwd_info->peripheral), |
| 108 | DIAG_STATUS_CLOSED, DCI_LOCAL_PROC); |
| 109 | } |
| 110 | |
| 111 | static int diag_add_hdlc_encoding(unsigned char *dest_buf, int *dest_len, |
| 112 | unsigned char *buf, int len) |
| 113 | { |
| 114 | struct diag_send_desc_type send = { NULL, NULL, DIAG_STATE_START, 0 }; |
| 115 | struct diag_hdlc_dest_type enc = { NULL, NULL, 0 }; |
| 116 | struct data_header *header; |
| 117 | int header_size = sizeof(struct data_header); |
| 118 | uint8_t *end_control_char = NULL; |
| 119 | uint8_t *payload = NULL; |
| 120 | uint8_t *temp_buf = NULL; |
| 121 | uint8_t *temp_encode_buf = NULL; |
| 122 | int src_pkt_len; |
| 123 | int encoded_pkt_length; |
| 124 | int max_size; |
| 125 | int total_processed = 0; |
| 126 | int bytes_remaining; |
| 127 | int err = 0; |
| 128 | uint8_t loop_count = 0; |
| 129 | |
| 130 | if (!dest_buf || !dest_len || !buf) |
| 131 | return -EIO; |
| 132 | |
| 133 | temp_buf = buf; |
| 134 | temp_encode_buf = dest_buf; |
| 135 | bytes_remaining = *dest_len; |
| 136 | |
| 137 | while (total_processed < len) { |
| 138 | loop_count++; |
| 139 | header = (struct data_header *)temp_buf; |
| 140 | /* Perform initial error checking */ |
| 141 | if (header->control_char != CONTROL_CHAR || |
| 142 | header->version != 1) { |
| 143 | err = -EINVAL; |
| 144 | break; |
| 145 | } |
| 146 | |
| 147 | if (header->length >= bytes_remaining) |
| 148 | break; |
| 149 | |
| 150 | payload = temp_buf + header_size; |
| 151 | end_control_char = payload + header->length; |
| 152 | if (*end_control_char != CONTROL_CHAR) { |
| 153 | err = -EINVAL; |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | max_size = 2 * header->length + 3; |
| 158 | if (bytes_remaining < max_size) { |
| 159 | err = -EINVAL; |
| 160 | break; |
| 161 | } |
| 162 | |
| 163 | /* Prepare for encoding the data */ |
| 164 | send.state = DIAG_STATE_START; |
| 165 | send.pkt = payload; |
| 166 | send.last = (void *)(payload + header->length - 1); |
| 167 | send.terminate = 1; |
| 168 | |
| 169 | enc.dest = temp_encode_buf; |
| 170 | enc.dest_last = (void *)(temp_encode_buf + max_size); |
| 171 | enc.crc = 0; |
| 172 | diag_hdlc_encode(&send, &enc); |
| 173 | |
| 174 | /* Prepare for next packet */ |
| 175 | src_pkt_len = (header_size + header->length + 1); |
| 176 | total_processed += src_pkt_len; |
| 177 | temp_buf += src_pkt_len; |
| 178 | |
| 179 | encoded_pkt_length = (uint8_t *)enc.dest - temp_encode_buf; |
| 180 | bytes_remaining -= encoded_pkt_length; |
| 181 | temp_encode_buf = enc.dest; |
| 182 | } |
| 183 | |
| 184 | *dest_len = (int)(temp_encode_buf - dest_buf); |
| 185 | |
| 186 | return err; |
| 187 | } |
| 188 | |
| 189 | static int check_bufsize_for_encoding(struct diagfwd_buf_t *buf, uint32_t len) |
| 190 | { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 191 | int i, ctx = 0; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 192 | uint32_t max_size = 0; |
| 193 | unsigned char *temp_buf = NULL; |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 194 | struct diag_md_info *ch = NULL; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 195 | |
| 196 | if (!buf || len == 0) |
| 197 | return -EINVAL; |
| 198 | |
| 199 | max_size = (2 * len) + 3; |
| 200 | if (max_size > PERIPHERAL_BUF_SZ) { |
| 201 | if (max_size > MAX_PERIPHERAL_HDLC_BUF_SZ) { |
| 202 | pr_err("diag: In %s, max_size is going beyond limit %d\n", |
| 203 | __func__, max_size); |
| 204 | max_size = MAX_PERIPHERAL_HDLC_BUF_SZ; |
| 205 | } |
| 206 | |
| 207 | if (buf->len < max_size) { |
Hardik Arya | fe005cc | 2017-12-01 12:31:58 +0530 | [diff] [blame] | 208 | if (driver->logging_mode == DIAG_MEMORY_DEVICE_MODE || |
| 209 | driver->logging_mode == DIAG_MULTI_MODE) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 210 | ch = &diag_md[DIAG_LOCAL_PROC]; |
| 211 | for (i = 0; ch != NULL && |
| 212 | i < ch->num_tbl_entries; i++) { |
| 213 | if (ch->tbl[i].buf == buf->data) { |
| 214 | ctx = ch->tbl[i].ctx; |
| 215 | ch->tbl[i].buf = NULL; |
| 216 | ch->tbl[i].len = 0; |
| 217 | ch->tbl[i].ctx = 0; |
| 218 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 219 | "Flushed mdlog table entries before reallocating data buffer, p:%d, t:%d\n", |
| 220 | GET_BUF_PERIPHERAL(ctx), |
| 221 | GET_BUF_TYPE(ctx)); |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 226 | temp_buf = krealloc(buf->data, max_size + |
| 227 | APF_DIAG_PADDING, |
| 228 | GFP_KERNEL); |
| 229 | if (!temp_buf) |
| 230 | return -ENOMEM; |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 231 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 232 | "Reallocated data buffer: %pK with size: %d\n", |
| 233 | temp_buf, max_size); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 234 | buf->data = temp_buf; |
| 235 | buf->len = max_size; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | return buf->len; |
| 240 | } |
| 241 | |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 242 | /* |
| 243 | * diag_md_get_peripheral(int ctxt) |
| 244 | * |
| 245 | * Context(ctxt) contains peripheral, channel type, buffer num and diag_id |
| 246 | * The function decodes the ctxt, checks for the active user pd session |
| 247 | * using diag_id and returns peripheral if not active or the PD if active. |
| 248 | * |
| 249 | */ |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 250 | int diag_md_get_peripheral(int ctxt) |
| 251 | { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 252 | uint8_t diag_id = 0, i = 0, pd = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 253 | int type = 0, peripheral = -EINVAL; |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 254 | int index = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 255 | struct diagfwd_info *fwd_info = NULL; |
| 256 | |
| 257 | peripheral = GET_BUF_PERIPHERAL(ctxt); |
Chris Lew | c937d69 | 2017-10-12 13:13:18 +0530 | [diff] [blame] | 258 | |
| 259 | /* Check for peripheral value within bounds |
| 260 | * of peripherals and UPD combined. |
| 261 | */ |
| 262 | if (peripheral < 0 || peripheral > NUM_MD_SESSIONS) |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 263 | return -EINVAL; |
| 264 | |
| 265 | if (peripheral == APPS_DATA) |
| 266 | return peripheral; |
| 267 | |
Chris Lew | c937d69 | 2017-10-12 13:13:18 +0530 | [diff] [blame] | 268 | /* With peripheral value bound checked |
| 269 | * return user pd value. |
| 270 | */ |
| 271 | if (peripheral > NUM_PERIPHERALS) |
| 272 | return peripheral; |
| 273 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 274 | type = GET_BUF_TYPE(ctxt); |
| 275 | if (type < 0 || type >= NUM_TYPES) |
| 276 | return -EINVAL; |
| 277 | |
| 278 | fwd_info = &peripheral_info[type][peripheral]; |
| 279 | if (!fwd_info) |
| 280 | return -EINVAL; |
| 281 | |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 282 | diag_id = GET_PD_CTXT(ctxt); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 283 | |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 284 | if (driver->num_pd_session && |
| 285 | driver->feature[peripheral].untag_header) { |
| 286 | if (diag_id == fwd_info->root_diag_id.diagid_val) { |
| 287 | if (peripheral != fwd_info->root_diag_id.pd) |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 288 | peripheral = -EINVAL; |
| 289 | } else { |
| 290 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 291 | if (diag_id == |
| 292 | fwd_info->upd_diag_id[i].diagid_val) { |
| 293 | pd = fwd_info->upd_diag_id[i].pd; |
| 294 | index = pd - UPD_WLAN; |
| 295 | if ((index >= 0 && index < NUM_UPD) && |
| 296 | driver->pd_logging_mode[index]) { |
| 297 | peripheral = pd; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 298 | break; |
| 299 | } |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | return peripheral; |
| 305 | } |
| 306 | |
| 307 | static void diagfwd_data_process_done(struct diagfwd_info *fwd_info, |
| 308 | struct diagfwd_buf_t *buf, int len) |
| 309 | { |
| 310 | int err = 0; |
| 311 | int write_len = 0, peripheral = 0; |
| 312 | unsigned char *write_buf = NULL; |
| 313 | struct diag_md_session_t *session_info = NULL; |
| 314 | uint8_t hdlc_disabled = 0; |
| 315 | |
| 316 | if (!fwd_info || !buf || len <= 0) { |
| 317 | diag_ws_release(); |
| 318 | return; |
| 319 | } |
| 320 | |
| 321 | switch (fwd_info->type) { |
| 322 | case TYPE_DATA: |
| 323 | case TYPE_CMD: |
| 324 | break; |
| 325 | default: |
| 326 | pr_err_ratelimited("diag: In %s, invalid type %d for peripheral %d\n", |
| 327 | __func__, fwd_info->type, |
| 328 | fwd_info->peripheral); |
| 329 | diag_ws_release(); |
| 330 | return; |
| 331 | } |
| 332 | |
| 333 | mutex_lock(&driver->hdlc_disable_mutex); |
| 334 | mutex_lock(&fwd_info->data_mutex); |
| 335 | |
| 336 | peripheral = |
| 337 | diag_md_get_peripheral(buf->ctxt); |
| 338 | if (peripheral < 0) { |
| 339 | pr_err("diag:%s:%d invalid peripheral = %d\n", |
| 340 | __func__, __LINE__, peripheral); |
| 341 | mutex_unlock(&fwd_info->data_mutex); |
| 342 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 343 | diag_ws_release(); |
| 344 | return; |
| 345 | } |
| 346 | |
| 347 | session_info = |
| 348 | diag_md_session_get_peripheral(peripheral); |
| 349 | if (session_info) |
| 350 | hdlc_disabled = session_info->hdlc_disabled; |
| 351 | else |
| 352 | hdlc_disabled = driver->hdlc_disabled; |
| 353 | |
| 354 | if (hdlc_disabled) { |
| 355 | /* The data is raw and and on APPS side HDLC is disabled */ |
| 356 | if (!buf) { |
| 357 | pr_err("diag: In %s, no match for non encode buffer %pK, peripheral %d, type: %d\n", |
| 358 | __func__, buf, fwd_info->peripheral, |
| 359 | fwd_info->type); |
| 360 | goto end; |
| 361 | } |
| 362 | if (len > PERIPHERAL_BUF_SZ) { |
| 363 | pr_err("diag: In %s, Incoming buffer too large %d, peripheral %d, type: %d\n", |
| 364 | __func__, len, fwd_info->peripheral, |
| 365 | fwd_info->type); |
| 366 | goto end; |
| 367 | } |
| 368 | write_len = len; |
| 369 | if (write_len <= 0) |
| 370 | goto end; |
| 371 | write_buf = buf->data_raw; |
| 372 | } else { |
| 373 | if (!buf) { |
| 374 | pr_err("diag: In %s, no match for non encode buffer %pK, peripheral %d, type: %d\n", |
| 375 | __func__, buf, fwd_info->peripheral, |
| 376 | fwd_info->type); |
| 377 | goto end; |
| 378 | } |
| 379 | |
| 380 | write_len = check_bufsize_for_encoding(buf, len); |
| 381 | if (write_len <= 0) { |
| 382 | pr_err("diag: error in checking buf for encoding\n"); |
| 383 | goto end; |
| 384 | } |
| 385 | write_buf = buf->data; |
| 386 | err = diag_add_hdlc_encoding(write_buf, &write_len, |
| 387 | buf->data_raw, len); |
| 388 | if (err) { |
| 389 | pr_err("diag: error in adding hdlc encoding\n"); |
| 390 | goto end; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | if (write_len > 0) { |
| 395 | err = diag_mux_write(DIAG_LOCAL_PROC, write_buf, write_len, |
| 396 | buf->ctxt); |
| 397 | if (err) { |
| 398 | pr_err_ratelimited("diag: In %s, unable to write to mux error: %d\n", |
| 399 | __func__, err); |
| 400 | goto end; |
| 401 | } |
| 402 | } |
| 403 | mutex_unlock(&fwd_info->data_mutex); |
| 404 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 405 | diagfwd_queue_read(fwd_info); |
| 406 | return; |
| 407 | |
| 408 | end: |
| 409 | diag_ws_release(); |
| 410 | mutex_unlock(&fwd_info->data_mutex); |
| 411 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 412 | if (buf) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 413 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 414 | "Marking buffer as free p: %d, t: %d, buf_num: %d\n", |
| 415 | fwd_info->peripheral, fwd_info->type, |
| 416 | GET_BUF_NUM(buf->ctxt)); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 417 | diagfwd_write_done(fwd_info->peripheral, fwd_info->type, |
| 418 | GET_BUF_NUM(buf->ctxt)); |
| 419 | } |
| 420 | diagfwd_queue_read(fwd_info); |
| 421 | } |
| 422 | |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 423 | /* |
| 424 | * diagfwd_data_read_untag_done(struct diagfwd_info *fwd_info, |
| 425 | * unsigned char *buf, int len) |
| 426 | * |
| 427 | * Data received from the peripheral can contain data from core and user PD |
| 428 | * The function segregates the data depending on the diag_id in the header |
| 429 | * of the packet chunk and copies to PD specific buffers. |
| 430 | * Sets the context for the buffers using diag_id and process it later for |
| 431 | * splitting the stream based on active PD logging. |
| 432 | * |
| 433 | */ |
| 434 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 435 | static void diagfwd_data_read_untag_done(struct diagfwd_info *fwd_info, |
| 436 | unsigned char *buf, int len) |
| 437 | { |
| 438 | int i = 0; |
| 439 | int len_cpd = 0; |
| 440 | int ctxt_cpd = 0; |
| 441 | int len_upd[MAX_PERIPHERAL_UPD] = {0}; |
| 442 | int ctxt_upd[MAX_PERIPHERAL_UPD] = {0}; |
| 443 | int packet_len = 0, processed = 0; |
| 444 | unsigned char *temp_buf_main = NULL; |
| 445 | unsigned char *temp_buf_cpd = NULL; |
| 446 | unsigned char *temp_buf_upd[MAX_PERIPHERAL_UPD] = {NULL}; |
| 447 | struct diagfwd_buf_t *temp_fwdinfo_cpd = NULL; |
| 448 | struct diagfwd_buf_t *temp_fwdinfo_upd = NULL; |
| 449 | int flag_buf_1 = 0, flag_buf_2 = 0; |
| 450 | uint8_t peripheral; |
| 451 | |
| 452 | if (!fwd_info || !buf || len <= 0) { |
| 453 | diag_ws_release(); |
| 454 | return; |
| 455 | } |
| 456 | |
| 457 | switch (fwd_info->type) { |
| 458 | case TYPE_DATA: |
| 459 | case TYPE_CMD: |
| 460 | break; |
| 461 | default: |
| 462 | pr_err_ratelimited("diag: In %s, invalid type %d for peripheral %d\n", |
| 463 | __func__, fwd_info->type, |
| 464 | fwd_info->peripheral); |
| 465 | diag_ws_release(); |
| 466 | return; |
| 467 | } |
| 468 | peripheral = fwd_info->peripheral; |
| 469 | if (peripheral >= NUM_PERIPHERALS) |
| 470 | return; |
| 471 | |
| 472 | if (driver->feature[peripheral].encode_hdlc && |
| 473 | driver->feature[peripheral].untag_header && |
| 474 | driver->peripheral_untag[peripheral]) { |
| 475 | temp_buf_cpd = buf; |
| 476 | temp_buf_main = buf; |
| 477 | if (fwd_info->buf_1 && |
| 478 | fwd_info->buf_1->data_raw == buf) { |
| 479 | flag_buf_1 = 1; |
| 480 | temp_fwdinfo_cpd = fwd_info->buf_1; |
| 481 | if (fwd_info->type == TYPE_DATA) { |
Hardik Arya | c8b90fe | 2017-11-24 11:55:23 +0530 | [diff] [blame] | 482 | for (i = 0; (i <= (fwd_info->num_pd - 2)) && |
| 483 | fwd_info->buf_upd[i][0]; i++) |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 484 | temp_buf_upd[i] = |
| 485 | fwd_info->buf_upd[i][0]->data_raw; |
| 486 | } |
| 487 | } else if (fwd_info->buf_2 && |
| 488 | fwd_info->buf_2->data_raw == buf) { |
| 489 | flag_buf_2 = 1; |
| 490 | temp_fwdinfo_cpd = fwd_info->buf_2; |
| 491 | if (fwd_info->type == TYPE_DATA) { |
Hardik Arya | c8b90fe | 2017-11-24 11:55:23 +0530 | [diff] [blame] | 492 | for (i = 0; (i <= (fwd_info->num_pd - 2)) && |
| 493 | fwd_info->buf_upd[i][1]; i++) |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 494 | temp_buf_upd[i] = |
| 495 | fwd_info->buf_upd[i][1]->data_raw; |
| 496 | } |
| 497 | } else { |
| 498 | pr_err("diag: In %s, no match for buffer %pK, peripheral %d, type: %d\n", |
| 499 | __func__, buf, peripheral, |
| 500 | fwd_info->type); |
| 501 | goto end; |
| 502 | } |
| 503 | |
| 504 | while (processed < len) { |
| 505 | pr_debug("diag_fr:untagged packet buf contents: %02x %02x %02x %02x\n", |
| 506 | *temp_buf_main, *(temp_buf_main+1), |
| 507 | *(temp_buf_main+2), *(temp_buf_main+3)); |
| 508 | packet_len = |
| 509 | *(uint16_t *) (temp_buf_main + 2); |
| 510 | if (packet_len > PERIPHERAL_BUF_SZ) |
| 511 | goto end; |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 512 | if ((*temp_buf_main) == |
| 513 | fwd_info->root_diag_id.diagid_val) { |
| 514 | ctxt_cpd = |
| 515 | fwd_info->root_diag_id.diagid_val; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 516 | len_cpd += packet_len; |
| 517 | if (temp_buf_cpd) { |
| 518 | memcpy(temp_buf_cpd, |
| 519 | (temp_buf_main + 4), packet_len); |
| 520 | temp_buf_cpd += packet_len; |
| 521 | } |
| 522 | } else { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 523 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
| 524 | if ((*temp_buf_main) == |
| 525 | fwd_info->upd_diag_id[i].diagid_val) { |
| 526 | ctxt_upd[i] = |
| 527 | fwd_info->upd_diag_id[i].diagid_val; |
| 528 | if (temp_buf_upd[i]) { |
| 529 | memcpy(temp_buf_upd[i], |
| 530 | (temp_buf_main + 4), |
| 531 | packet_len); |
| 532 | temp_buf_upd[i] += packet_len; |
| 533 | } |
| 534 | len_upd[i] += packet_len; |
| 535 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 536 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 537 | } |
| 538 | len = len - 4; |
| 539 | temp_buf_main += (packet_len + 4); |
| 540 | processed += packet_len; |
| 541 | } |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 542 | |
| 543 | if (flag_buf_1) { |
| 544 | fwd_info->cpd_len_1 = len_cpd; |
| 545 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) |
| 546 | if (fwd_info->type == TYPE_DATA) |
| 547 | fwd_info->upd_len[i][0] = len_upd[i]; |
| 548 | } else if (flag_buf_2) { |
| 549 | fwd_info->cpd_len_2 = len_cpd; |
| 550 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) |
| 551 | if (fwd_info->type == TYPE_DATA) |
| 552 | fwd_info->upd_len[i][1] = len_upd[i]; |
| 553 | } |
| 554 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 555 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
| 556 | if (fwd_info->type == TYPE_DATA && len_upd[i]) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 557 | if (flag_buf_1) |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 558 | temp_fwdinfo_upd = |
| 559 | fwd_info->buf_upd[i][0]; |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 560 | else |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 561 | temp_fwdinfo_upd = |
| 562 | fwd_info->buf_upd[i][1]; |
Hardik Arya | c8b90fe | 2017-11-24 11:55:23 +0530 | [diff] [blame] | 563 | if (!temp_fwdinfo_upd) |
| 564 | break; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 565 | temp_fwdinfo_upd->ctxt &= 0x00FFFFFF; |
| 566 | temp_fwdinfo_upd->ctxt |= |
| 567 | (SET_PD_CTXT(ctxt_upd[i])); |
| 568 | atomic_set(&temp_fwdinfo_upd->in_busy, 1); |
| 569 | diagfwd_data_process_done(fwd_info, |
| 570 | temp_fwdinfo_upd, len_upd[i]); |
| 571 | } else { |
| 572 | if (flag_buf_1) |
| 573 | fwd_info->upd_len[i][0] = 0; |
| 574 | if (flag_buf_2) |
| 575 | fwd_info->upd_len[i][1] = 0; |
| 576 | } |
| 577 | } |
Manoj Prabhu B | 37c77c0 | 2017-09-18 11:38:48 +0530 | [diff] [blame] | 578 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 579 | if (len_cpd) { |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 580 | temp_fwdinfo_cpd->ctxt &= 0x00FFFFFF; |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 581 | temp_fwdinfo_cpd->ctxt |= (SET_PD_CTXT(ctxt_cpd)); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 582 | diagfwd_data_process_done(fwd_info, |
| 583 | temp_fwdinfo_cpd, len_cpd); |
| 584 | } else { |
| 585 | if (flag_buf_1) |
| 586 | fwd_info->cpd_len_1 = 0; |
| 587 | if (flag_buf_2) |
| 588 | fwd_info->cpd_len_2 = 0; |
| 589 | } |
| 590 | } else { |
| 591 | diagfwd_data_read_done(fwd_info, buf, len); |
| 592 | } |
| 593 | return; |
| 594 | end: |
| 595 | diag_ws_release(); |
| 596 | if (temp_fwdinfo_cpd) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 597 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 598 | "Marking buffer as free p: %d, t: %d, buf_num: %d\n", |
| 599 | fwd_info->peripheral, fwd_info->type, |
| 600 | GET_BUF_NUM(temp_fwdinfo_cpd->ctxt)); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 601 | diagfwd_write_done(fwd_info->peripheral, fwd_info->type, |
| 602 | GET_BUF_NUM(temp_fwdinfo_cpd->ctxt)); |
| 603 | } |
| 604 | diagfwd_queue_read(fwd_info); |
| 605 | } |
| 606 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 607 | static void diagfwd_data_read_done(struct diagfwd_info *fwd_info, |
| 608 | unsigned char *buf, int len) |
| 609 | { |
| 610 | int err = 0; |
| 611 | int write_len = 0; |
| 612 | unsigned char *write_buf = NULL; |
| 613 | struct diagfwd_buf_t *temp_buf = NULL; |
| 614 | struct diag_md_session_t *session_info = NULL; |
| 615 | uint8_t hdlc_disabled = 0; |
| 616 | |
| 617 | if (!fwd_info || !buf || len <= 0) { |
| 618 | diag_ws_release(); |
| 619 | return; |
| 620 | } |
| 621 | |
| 622 | switch (fwd_info->type) { |
| 623 | case TYPE_DATA: |
| 624 | case TYPE_CMD: |
| 625 | break; |
| 626 | default: |
| 627 | pr_err_ratelimited("diag: In %s, invalid type %d for peripheral %d\n", |
| 628 | __func__, fwd_info->type, |
| 629 | fwd_info->peripheral); |
| 630 | diag_ws_release(); |
| 631 | return; |
| 632 | } |
| 633 | |
| 634 | mutex_lock(&driver->hdlc_disable_mutex); |
| 635 | mutex_lock(&fwd_info->data_mutex); |
| 636 | session_info = diag_md_session_get_peripheral(fwd_info->peripheral); |
| 637 | if (session_info) |
| 638 | hdlc_disabled = session_info->hdlc_disabled; |
| 639 | else |
| 640 | hdlc_disabled = driver->hdlc_disabled; |
| 641 | |
| 642 | if (!driver->feature[fwd_info->peripheral].encode_hdlc) { |
| 643 | if (fwd_info->buf_1 && fwd_info->buf_1->data == buf) { |
| 644 | temp_buf = fwd_info->buf_1; |
| 645 | write_buf = fwd_info->buf_1->data; |
| 646 | } else if (fwd_info->buf_2 && fwd_info->buf_2->data == buf) { |
| 647 | temp_buf = fwd_info->buf_2; |
| 648 | write_buf = fwd_info->buf_2->data; |
| 649 | } else { |
| 650 | pr_err("diag: In %s, no match for buffer %pK, peripheral %d, type: %d\n", |
| 651 | __func__, buf, fwd_info->peripheral, |
| 652 | fwd_info->type); |
| 653 | goto end; |
| 654 | } |
| 655 | write_len = len; |
| 656 | } else if (hdlc_disabled) { |
| 657 | /* The data is raw and and on APPS side HDLC is disabled */ |
| 658 | if (fwd_info->buf_1 && fwd_info->buf_1->data_raw == buf) { |
| 659 | temp_buf = fwd_info->buf_1; |
| 660 | } else if (fwd_info->buf_2 && |
| 661 | fwd_info->buf_2->data_raw == buf) { |
| 662 | temp_buf = fwd_info->buf_2; |
| 663 | } else { |
| 664 | pr_err("diag: In %s, no match for non encode buffer %pK, peripheral %d, type: %d\n", |
| 665 | __func__, buf, fwd_info->peripheral, |
| 666 | fwd_info->type); |
| 667 | goto end; |
| 668 | } |
| 669 | if (len > PERIPHERAL_BUF_SZ) { |
| 670 | pr_err("diag: In %s, Incoming buffer too large %d, peripheral %d, type: %d\n", |
| 671 | __func__, len, fwd_info->peripheral, |
| 672 | fwd_info->type); |
| 673 | goto end; |
| 674 | } |
| 675 | write_len = len; |
| 676 | write_buf = buf; |
| 677 | } else { |
| 678 | if (fwd_info->buf_1 && fwd_info->buf_1->data_raw == buf) { |
| 679 | temp_buf = fwd_info->buf_1; |
| 680 | } else if (fwd_info->buf_2 && |
| 681 | fwd_info->buf_2->data_raw == buf) { |
| 682 | temp_buf = fwd_info->buf_2; |
| 683 | } else { |
| 684 | pr_err("diag: In %s, no match for non encode buffer %pK, peripheral %d, type: %d\n", |
| 685 | __func__, buf, fwd_info->peripheral, |
| 686 | fwd_info->type); |
| 687 | goto end; |
| 688 | } |
| 689 | write_len = check_bufsize_for_encoding(temp_buf, len); |
| 690 | if (write_len <= 0) { |
| 691 | pr_err("diag: error in checking buf for encoding\n"); |
| 692 | goto end; |
| 693 | } |
| 694 | write_buf = temp_buf->data; |
| 695 | err = diag_add_hdlc_encoding(write_buf, &write_len, buf, len); |
| 696 | if (err) { |
| 697 | pr_err("diag: error in adding hdlc encoding\n"); |
| 698 | goto end; |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | if (write_len > 0) { |
| 703 | err = diag_mux_write(DIAG_LOCAL_PROC, write_buf, write_len, |
| 704 | temp_buf->ctxt); |
| 705 | if (err) { |
| 706 | pr_err_ratelimited("diag: In %s, unable to write to mux error: %d\n", |
| 707 | __func__, err); |
| 708 | goto end; |
| 709 | } |
| 710 | } |
| 711 | mutex_unlock(&fwd_info->data_mutex); |
| 712 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 713 | diagfwd_queue_read(fwd_info); |
| 714 | return; |
| 715 | |
| 716 | end: |
| 717 | diag_ws_release(); |
| 718 | mutex_unlock(&fwd_info->data_mutex); |
| 719 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 720 | if (temp_buf) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 721 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 722 | "Marking buffer as free p: %d, t: %d, buf_num: %d\n", |
| 723 | fwd_info->peripheral, fwd_info->type, |
| 724 | GET_BUF_NUM(temp_buf->ctxt)); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 725 | diagfwd_write_done(fwd_info->peripheral, fwd_info->type, |
| 726 | GET_BUF_NUM(temp_buf->ctxt)); |
| 727 | } |
| 728 | diagfwd_queue_read(fwd_info); |
| 729 | } |
| 730 | |
| 731 | static void diagfwd_cntl_read_done(struct diagfwd_info *fwd_info, |
| 732 | unsigned char *buf, int len) |
| 733 | { |
| 734 | if (!fwd_info) { |
| 735 | diag_ws_release(); |
| 736 | return; |
| 737 | } |
| 738 | |
| 739 | if (fwd_info->type != TYPE_CNTL) { |
| 740 | pr_err("diag: In %s, invalid type %d for peripheral %d\n", |
| 741 | __func__, fwd_info->type, fwd_info->peripheral); |
| 742 | diag_ws_release(); |
| 743 | return; |
| 744 | } |
| 745 | |
| 746 | diag_ws_on_read(DIAG_WS_MUX, len); |
| 747 | diag_cntl_process_read_data(fwd_info, buf, len); |
| 748 | /* |
| 749 | * Control packets are not consumed by the clients. Mimic |
| 750 | * consumption by setting and clearing the wakeup source copy_count |
| 751 | * explicitly. |
| 752 | */ |
| 753 | diag_ws_on_copy_fail(DIAG_WS_MUX); |
| 754 | /* Reset the buffer in_busy value after processing the data */ |
| 755 | if (fwd_info->buf_1) |
| 756 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 757 | |
| 758 | diagfwd_queue_read(fwd_info); |
| 759 | diagfwd_queue_read(&peripheral_info[TYPE_DATA][fwd_info->peripheral]); |
| 760 | diagfwd_queue_read(&peripheral_info[TYPE_CMD][fwd_info->peripheral]); |
| 761 | } |
| 762 | |
| 763 | static void diagfwd_dci_read_done(struct diagfwd_info *fwd_info, |
| 764 | unsigned char *buf, int len) |
| 765 | { |
| 766 | if (!fwd_info) |
| 767 | return; |
| 768 | |
| 769 | switch (fwd_info->type) { |
| 770 | case TYPE_DCI: |
| 771 | case TYPE_DCI_CMD: |
| 772 | break; |
| 773 | default: |
| 774 | pr_err("diag: In %s, invalid type %d for peripheral %d\n", |
| 775 | __func__, fwd_info->type, fwd_info->peripheral); |
| 776 | return; |
| 777 | } |
| 778 | |
| 779 | diag_dci_process_peripheral_data(fwd_info, (void *)buf, len); |
| 780 | /* Reset the buffer in_busy value after processing the data */ |
| 781 | if (fwd_info->buf_1) |
| 782 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 783 | |
| 784 | diagfwd_queue_read(fwd_info); |
| 785 | } |
| 786 | |
| 787 | static void diagfwd_reset_buffers(struct diagfwd_info *fwd_info, |
| 788 | unsigned char *buf) |
| 789 | { |
| 790 | if (!fwd_info || !buf) |
| 791 | return; |
| 792 | |
| 793 | if (!driver->feature[fwd_info->peripheral].encode_hdlc) { |
| 794 | if (fwd_info->buf_1 && fwd_info->buf_1->data == buf) |
| 795 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 796 | else if (fwd_info->buf_2 && fwd_info->buf_2->data == buf) |
| 797 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 798 | } else { |
| 799 | if (fwd_info->buf_1 && fwd_info->buf_1->data_raw == buf) |
| 800 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 801 | else if (fwd_info->buf_2 && fwd_info->buf_2->data_raw == buf) |
| 802 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 803 | } |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 804 | if (fwd_info->buf_1 && !atomic_read(&(fwd_info->buf_1->in_busy))) { |
| 805 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 806 | "Buffer 1 for core PD is marked free, p: %d, t: %d\n", |
| 807 | fwd_info->peripheral, fwd_info->type); |
| 808 | } |
| 809 | if (fwd_info->buf_2 && !atomic_read(&(fwd_info->buf_2->in_busy))) { |
| 810 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 811 | "Buffer 2 for core PD is marked free, p: %d, t: %d\n", |
| 812 | fwd_info->peripheral, fwd_info->type); |
| 813 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 814 | } |
| 815 | |
| 816 | int diagfwd_peripheral_init(void) |
| 817 | { |
| 818 | uint8_t peripheral; |
| 819 | uint8_t transport; |
| 820 | uint8_t type; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 821 | int i = 0; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 822 | struct diagfwd_info *fwd_info = NULL; |
| 823 | |
| 824 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 825 | early_init_info[transport] = kzalloc( |
| 826 | sizeof(struct diagfwd_info) * NUM_PERIPHERALS, |
| 827 | GFP_KERNEL); |
| 828 | if (!early_init_info[transport]) |
| 829 | return -ENOMEM; |
| 830 | kmemleak_not_leak(early_init_info[transport]); |
| 831 | } |
| 832 | |
| 833 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 834 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 835 | fwd_info = &early_init_info[transport][peripheral]; |
| 836 | fwd_info->peripheral = peripheral; |
| 837 | fwd_info->type = TYPE_CNTL; |
| 838 | fwd_info->transport = transport; |
| 839 | fwd_info->ctxt = NULL; |
| 840 | fwd_info->p_ops = NULL; |
| 841 | fwd_info->ch_open = 0; |
| 842 | fwd_info->inited = 1; |
| 843 | fwd_info->read_bytes = 0; |
| 844 | fwd_info->write_bytes = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 845 | fwd_info->cpd_len_1 = 0; |
| 846 | fwd_info->cpd_len_2 = 0; |
| 847 | fwd_info->num_pd = 0; |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 848 | fwd_info->root_diag_id.diagid_val = 0; |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 849 | mutex_init(&fwd_info->buf_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 850 | mutex_init(&fwd_info->data_mutex); |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 851 | spin_lock_init(&fwd_info->write_buf_lock); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 852 | |
| 853 | for (i = 0; i < MAX_PERIPHERAL_UPD; i++) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 854 | fwd_info->upd_diag_id[i].diagid_val = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 855 | fwd_info->upd_len[i][0] = 0; |
| 856 | fwd_info->upd_len[i][1] = 0; |
| 857 | fwd_info->buf_upd[i][0] = NULL; |
| 858 | fwd_info->buf_upd[i][1] = NULL; |
| 859 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 860 | } |
| 861 | } |
| 862 | |
| 863 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 864 | for (type = 0; type < NUM_TYPES; type++) { |
| 865 | fwd_info = &peripheral_info[type][peripheral]; |
| 866 | fwd_info->peripheral = peripheral; |
| 867 | fwd_info->type = type; |
| 868 | fwd_info->ctxt = NULL; |
| 869 | fwd_info->p_ops = NULL; |
| 870 | fwd_info->ch_open = 0; |
| 871 | fwd_info->read_bytes = 0; |
| 872 | fwd_info->write_bytes = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 873 | fwd_info->num_pd = 0; |
| 874 | fwd_info->cpd_len_1 = 0; |
| 875 | fwd_info->cpd_len_2 = 0; |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 876 | fwd_info->root_diag_id.diagid_val = 0; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 877 | spin_lock_init(&fwd_info->write_buf_lock); |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 878 | mutex_init(&fwd_info->buf_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 879 | mutex_init(&fwd_info->data_mutex); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 880 | |
| 881 | for (i = 0; i < MAX_PERIPHERAL_UPD; i++) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 882 | fwd_info->upd_diag_id[i].diagid_val = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 883 | fwd_info->upd_len[i][0] = 0; |
| 884 | fwd_info->upd_len[i][1] = 0; |
| 885 | fwd_info->buf_upd[i][0] = NULL; |
| 886 | fwd_info->buf_upd[i][1] = NULL; |
| 887 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 888 | /* |
| 889 | * This state shouldn't be set for Control channels |
| 890 | * during initialization. This is set when the feature |
| 891 | * mask is received for the first time. |
| 892 | */ |
| 893 | if (type != TYPE_CNTL) |
| 894 | fwd_info->inited = 1; |
| 895 | } |
| 896 | driver->diagfwd_data[peripheral] = |
| 897 | &peripheral_info[TYPE_DATA][peripheral]; |
| 898 | driver->diagfwd_cntl[peripheral] = |
| 899 | &peripheral_info[TYPE_CNTL][peripheral]; |
| 900 | driver->diagfwd_dci[peripheral] = |
| 901 | &peripheral_info[TYPE_DCI][peripheral]; |
| 902 | driver->diagfwd_cmd[peripheral] = |
| 903 | &peripheral_info[TYPE_CMD][peripheral]; |
| 904 | driver->diagfwd_dci_cmd[peripheral] = |
| 905 | &peripheral_info[TYPE_DCI_CMD][peripheral]; |
| 906 | } |
| 907 | |
| 908 | if (driver->supports_sockets) |
| 909 | diag_socket_init(); |
| 910 | diag_glink_init(); |
| 911 | |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | void diagfwd_peripheral_exit(void) |
| 916 | { |
| 917 | uint8_t peripheral; |
| 918 | uint8_t type; |
| 919 | struct diagfwd_info *fwd_info = NULL; |
Sreelakshmi Gownipalli | 323a921 | 2017-09-18 12:41:47 -0700 | [diff] [blame] | 920 | int transport = 0; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 921 | |
| 922 | diag_socket_exit(); |
| 923 | |
| 924 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 925 | for (type = 0; type < NUM_TYPES; type++) { |
| 926 | fwd_info = &peripheral_info[type][peripheral]; |
| 927 | fwd_info->ctxt = NULL; |
| 928 | fwd_info->p_ops = NULL; |
| 929 | fwd_info->ch_open = 0; |
| 930 | diagfwd_buffers_exit(fwd_info); |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | for (peripheral = 0; peripheral < NUM_PERIPHERALS; peripheral++) { |
| 935 | driver->diagfwd_data[peripheral] = NULL; |
| 936 | driver->diagfwd_cntl[peripheral] = NULL; |
| 937 | driver->diagfwd_dci[peripheral] = NULL; |
| 938 | driver->diagfwd_cmd[peripheral] = NULL; |
| 939 | driver->diagfwd_dci_cmd[peripheral] = NULL; |
| 940 | } |
| 941 | |
Sreelakshmi Gownipalli | 323a921 | 2017-09-18 12:41:47 -0700 | [diff] [blame] | 942 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 943 | kfree(early_init_info[transport]); |
| 944 | early_init_info[transport] = NULL; |
| 945 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 946 | } |
| 947 | |
| 948 | int diagfwd_cntl_register(uint8_t transport, uint8_t peripheral, void *ctxt, |
| 949 | struct diag_peripheral_ops *ops, |
| 950 | struct diagfwd_info **fwd_ctxt) |
| 951 | { |
| 952 | struct diagfwd_info *fwd_info = NULL; |
| 953 | |
| 954 | if (!ctxt || !ops) |
| 955 | return -EIO; |
| 956 | |
| 957 | if (transport >= NUM_TRANSPORT || peripheral >= NUM_PERIPHERALS) |
| 958 | return -EINVAL; |
| 959 | |
| 960 | fwd_info = &early_init_info[transport][peripheral]; |
| 961 | *fwd_ctxt = &early_init_info[transport][peripheral]; |
| 962 | fwd_info->ctxt = ctxt; |
| 963 | fwd_info->p_ops = ops; |
| 964 | fwd_info->c_ops = &cntl_ch_ops; |
| 965 | |
| 966 | return 0; |
| 967 | } |
| 968 | |
| 969 | int diagfwd_register(uint8_t transport, uint8_t peripheral, uint8_t type, |
| 970 | void *ctxt, struct diag_peripheral_ops *ops, |
| 971 | struct diagfwd_info **fwd_ctxt) |
| 972 | { |
| 973 | struct diagfwd_info *fwd_info = NULL; |
| 974 | |
| 975 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES || |
| 976 | !ctxt || !ops || transport >= NUM_TRANSPORT) { |
| 977 | pr_err("diag: In %s, returning error\n", __func__); |
| 978 | return -EIO; |
| 979 | } |
| 980 | |
| 981 | fwd_info = &peripheral_info[type][peripheral]; |
| 982 | *fwd_ctxt = &peripheral_info[type][peripheral]; |
| 983 | fwd_info->ctxt = ctxt; |
| 984 | fwd_info->p_ops = ops; |
| 985 | fwd_info->transport = transport; |
| 986 | fwd_info->ch_open = 0; |
| 987 | |
| 988 | switch (type) { |
| 989 | case TYPE_DATA: |
| 990 | case TYPE_CMD: |
| 991 | fwd_info->c_ops = &data_ch_ops; |
| 992 | break; |
| 993 | case TYPE_DCI: |
| 994 | case TYPE_DCI_CMD: |
| 995 | fwd_info->c_ops = &dci_ch_ops; |
| 996 | break; |
| 997 | default: |
| 998 | pr_err("diag: In %s, invalid type: %d\n", __func__, type); |
| 999 | return -EINVAL; |
| 1000 | } |
| 1001 | |
| 1002 | if (atomic_read(&fwd_info->opened) && |
| 1003 | fwd_info->p_ops && fwd_info->p_ops->open) { |
| 1004 | /* |
| 1005 | * The registration can happen late, like in the case of |
| 1006 | * sockets. fwd_info->opened reflects diag_state. Propagate the |
| 1007 | * state to the peipherals. |
| 1008 | */ |
| 1009 | fwd_info->p_ops->open(fwd_info->ctxt); |
| 1010 | } |
| 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | void diagfwd_deregister(uint8_t peripheral, uint8_t type, void *ctxt) |
| 1016 | { |
| 1017 | struct diagfwd_info *fwd_info = NULL; |
| 1018 | |
| 1019 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES || !ctxt) |
| 1020 | return; |
| 1021 | |
| 1022 | fwd_info = &peripheral_info[type][peripheral]; |
| 1023 | if (fwd_info->ctxt != ctxt) { |
| 1024 | pr_err("diag: In %s, unable to find a match for p: %d t: %d\n", |
| 1025 | __func__, peripheral, type); |
| 1026 | return; |
| 1027 | } |
| 1028 | fwd_info->ctxt = NULL; |
| 1029 | fwd_info->p_ops = NULL; |
| 1030 | fwd_info->ch_open = 0; |
| 1031 | diagfwd_buffers_exit(fwd_info); |
| 1032 | |
| 1033 | switch (type) { |
| 1034 | case TYPE_DATA: |
| 1035 | driver->diagfwd_data[peripheral] = NULL; |
| 1036 | break; |
| 1037 | case TYPE_CNTL: |
| 1038 | driver->diagfwd_cntl[peripheral] = NULL; |
| 1039 | break; |
| 1040 | case TYPE_DCI: |
| 1041 | driver->diagfwd_dci[peripheral] = NULL; |
| 1042 | break; |
| 1043 | case TYPE_CMD: |
| 1044 | driver->diagfwd_cmd[peripheral] = NULL; |
| 1045 | break; |
| 1046 | case TYPE_DCI_CMD: |
| 1047 | driver->diagfwd_dci_cmd[peripheral] = NULL; |
| 1048 | break; |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | void diagfwd_close_transport(uint8_t transport, uint8_t peripheral) |
| 1053 | { |
| 1054 | struct diagfwd_info *fwd_info = NULL; |
| 1055 | struct diagfwd_info *dest_info = NULL; |
| 1056 | int (*init_fn)(uint8_t) = NULL; |
| 1057 | void (*invalidate_fn)(void *, struct diagfwd_info *) = NULL; |
| 1058 | int (*check_channel_state)(void *) = NULL; |
| 1059 | uint8_t transport_open = 0; |
| 1060 | int i = 0; |
| 1061 | |
| 1062 | if (peripheral >= NUM_PERIPHERALS) |
| 1063 | return; |
| 1064 | |
| 1065 | switch (transport) { |
| 1066 | case TRANSPORT_GLINK: |
| 1067 | transport_open = TRANSPORT_SOCKET; |
| 1068 | init_fn = diag_socket_init_peripheral; |
| 1069 | invalidate_fn = diag_socket_invalidate; |
| 1070 | check_channel_state = diag_socket_check_state; |
| 1071 | break; |
| 1072 | case TRANSPORT_SOCKET: |
| 1073 | transport_open = TRANSPORT_GLINK; |
| 1074 | init_fn = diag_glink_init_peripheral; |
| 1075 | invalidate_fn = diag_glink_invalidate; |
| 1076 | check_channel_state = diag_glink_check_state; |
| 1077 | break; |
| 1078 | default: |
| 1079 | return; |
| 1080 | |
| 1081 | } |
| 1082 | |
Manoj Prabhu B | 9832546 | 2017-01-10 20:19:28 +0530 | [diff] [blame] | 1083 | mutex_lock(&driver->diagfwd_channel_mutex[peripheral]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1084 | fwd_info = &early_init_info[transport][peripheral]; |
| 1085 | if (fwd_info->p_ops && fwd_info->p_ops->close) |
| 1086 | fwd_info->p_ops->close(fwd_info->ctxt); |
| 1087 | fwd_info = &early_init_info[transport_open][peripheral]; |
| 1088 | dest_info = &peripheral_info[TYPE_CNTL][peripheral]; |
| 1089 | dest_info->inited = 1; |
| 1090 | dest_info->ctxt = fwd_info->ctxt; |
| 1091 | dest_info->p_ops = fwd_info->p_ops; |
| 1092 | dest_info->c_ops = fwd_info->c_ops; |
| 1093 | dest_info->ch_open = fwd_info->ch_open; |
| 1094 | dest_info->read_bytes = fwd_info->read_bytes; |
| 1095 | dest_info->write_bytes = fwd_info->write_bytes; |
| 1096 | dest_info->inited = fwd_info->inited; |
| 1097 | dest_info->buf_1 = fwd_info->buf_1; |
| 1098 | dest_info->buf_2 = fwd_info->buf_2; |
| 1099 | dest_info->transport = fwd_info->transport; |
| 1100 | invalidate_fn(dest_info->ctxt, dest_info); |
| 1101 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) |
| 1102 | dest_info->buf_ptr[i] = fwd_info->buf_ptr[i]; |
| 1103 | if (!check_channel_state(dest_info->ctxt)) |
| 1104 | diagfwd_late_open(dest_info); |
Manoj Prabhu B | 0e53553 | 2017-08-24 09:56:03 +0530 | [diff] [blame] | 1105 | diagfwd_cntl_open(dest_info); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1106 | init_fn(peripheral); |
Manoj Prabhu B | 9832546 | 2017-01-10 20:19:28 +0530 | [diff] [blame] | 1107 | mutex_unlock(&driver->diagfwd_channel_mutex[peripheral]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1108 | diagfwd_queue_read(&peripheral_info[TYPE_DATA][peripheral]); |
| 1109 | diagfwd_queue_read(&peripheral_info[TYPE_CMD][peripheral]); |
| 1110 | } |
| 1111 | |
| 1112 | void *diagfwd_request_write_buf(struct diagfwd_info *fwd_info) |
| 1113 | { |
| 1114 | void *buf = NULL; |
| 1115 | int index; |
| 1116 | unsigned long flags; |
| 1117 | |
| 1118 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 1119 | for (index = 0 ; index < NUM_WRITE_BUFFERS; index++) { |
| 1120 | if (!atomic_read(&(fwd_info->buf_ptr[index]->in_busy))) { |
| 1121 | atomic_set(&(fwd_info->buf_ptr[index]->in_busy), 1); |
| 1122 | buf = fwd_info->buf_ptr[index]->data; |
| 1123 | if (!buf) |
| 1124 | return NULL; |
| 1125 | break; |
| 1126 | } |
| 1127 | } |
| 1128 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1129 | return buf; |
| 1130 | } |
| 1131 | |
| 1132 | int diagfwd_write(uint8_t peripheral, uint8_t type, void *buf, int len) |
| 1133 | { |
| 1134 | struct diagfwd_info *fwd_info = NULL; |
| 1135 | int err = 0; |
| 1136 | uint8_t retry_count = 0; |
| 1137 | uint8_t max_retries = 3; |
| 1138 | void *buf_ptr = NULL; |
| 1139 | |
| 1140 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 1141 | return -EINVAL; |
| 1142 | |
| 1143 | if (type == TYPE_CMD || type == TYPE_DCI_CMD) { |
| 1144 | if (!driver->feature[peripheral].rcvd_feature_mask || |
| 1145 | !driver->feature[peripheral].sent_feature_mask) { |
| 1146 | pr_debug_ratelimited("diag: In %s, feature mask for peripheral: %d not received or sent yet\n", |
| 1147 | __func__, peripheral); |
| 1148 | return 0; |
| 1149 | } |
| 1150 | if (!driver->feature[peripheral].separate_cmd_rsp) |
| 1151 | type = (type == TYPE_CMD) ? TYPE_DATA : TYPE_DCI; |
| 1152 | } |
| 1153 | |
| 1154 | fwd_info = &peripheral_info[type][peripheral]; |
| 1155 | if (!fwd_info->inited || !atomic_read(&fwd_info->opened)) |
| 1156 | return -ENODEV; |
| 1157 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1158 | if (type == TYPE_CMD) { |
Manoj Prabhu B | d796242 | 2017-09-14 14:14:08 +0530 | [diff] [blame] | 1159 | if (driver->feature[peripheral].diag_id_support) |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1160 | if (!fwd_info->root_diag_id.diagid_val || |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1161 | (!driver->diag_id_sent[peripheral])) { |
| 1162 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1163 | "diag: diag_id is not assigned yet\n"); |
| 1164 | return 0; |
| 1165 | } |
| 1166 | } |
| 1167 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1168 | if (!(fwd_info->p_ops && fwd_info->p_ops->write && fwd_info->ctxt)) |
| 1169 | return -EIO; |
| 1170 | |
| 1171 | if (fwd_info->transport == TRANSPORT_GLINK) { |
| 1172 | buf_ptr = diagfwd_request_write_buf(fwd_info); |
| 1173 | if (buf_ptr) |
| 1174 | memcpy(buf_ptr, buf, len); |
| 1175 | else { |
| 1176 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1177 | "diag: buffer not found for writing\n"); |
| 1178 | return -EIO; |
| 1179 | } |
| 1180 | } else |
| 1181 | buf_ptr = buf; |
| 1182 | |
| 1183 | while (retry_count < max_retries) { |
| 1184 | err = 0; |
| 1185 | err = fwd_info->p_ops->write(fwd_info->ctxt, buf_ptr, len); |
| 1186 | if (err && err != -ENODEV) { |
| 1187 | usleep_range(100000, 101000); |
| 1188 | retry_count++; |
| 1189 | continue; |
| 1190 | } |
| 1191 | break; |
| 1192 | } |
| 1193 | |
| 1194 | if (!err) |
| 1195 | fwd_info->write_bytes += len; |
| 1196 | else |
| 1197 | if (fwd_info->transport == TRANSPORT_GLINK) |
| 1198 | diagfwd_write_buffer_done(fwd_info, buf_ptr); |
| 1199 | return err; |
| 1200 | } |
| 1201 | |
| 1202 | static void __diag_fwd_open(struct diagfwd_info *fwd_info) |
| 1203 | { |
| 1204 | if (!fwd_info) |
| 1205 | return; |
| 1206 | |
| 1207 | atomic_set(&fwd_info->opened, 1); |
| 1208 | if (!fwd_info->inited) |
| 1209 | return; |
| 1210 | |
Manoj Prabhu B | 1550bdd0 | 2017-04-14 12:50:24 +0530 | [diff] [blame] | 1211 | /* |
| 1212 | * Logging mode here is reflecting previous mode |
| 1213 | * status and will be updated to new mode later. |
| 1214 | * |
| 1215 | * Keeping the buffers busy for Memory Device Mode. |
| 1216 | */ |
| 1217 | |
| 1218 | if ((driver->logging_mode != DIAG_USB_MODE) || |
| 1219 | driver->usb_connected) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1220 | if (fwd_info->buf_1) { |
Manoj Prabhu B | 1550bdd0 | 2017-04-14 12:50:24 +0530 | [diff] [blame] | 1221 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1222 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1223 | "Buffer 1 for core PD is marked free, p: %d, t: %d\n", |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1224 | fwd_info->peripheral, fwd_info->type); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1225 | } |
| 1226 | if (fwd_info->buf_2) { |
Manoj Prabhu B | 1550bdd0 | 2017-04-14 12:50:24 +0530 | [diff] [blame] | 1227 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1228 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1229 | "Buffer 2 for core PD is marked free, p: %d, t: %d\n", |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1230 | fwd_info->peripheral, fwd_info->type); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1231 | } |
Manoj Prabhu B | 1550bdd0 | 2017-04-14 12:50:24 +0530 | [diff] [blame] | 1232 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1233 | |
| 1234 | if (fwd_info->p_ops && fwd_info->p_ops->open) |
| 1235 | fwd_info->p_ops->open(fwd_info->ctxt); |
| 1236 | |
| 1237 | diagfwd_queue_read(fwd_info); |
| 1238 | } |
| 1239 | |
| 1240 | void diagfwd_early_open(uint8_t peripheral) |
| 1241 | { |
| 1242 | uint8_t transport = 0; |
| 1243 | struct diagfwd_info *fwd_info = NULL; |
| 1244 | |
| 1245 | if (peripheral >= NUM_PERIPHERALS) |
| 1246 | return; |
| 1247 | |
| 1248 | for (transport = 0; transport < NUM_TRANSPORT; transport++) { |
| 1249 | fwd_info = &early_init_info[transport][peripheral]; |
| 1250 | __diag_fwd_open(fwd_info); |
| 1251 | } |
| 1252 | } |
| 1253 | |
| 1254 | void diagfwd_open(uint8_t peripheral, uint8_t type) |
| 1255 | { |
| 1256 | struct diagfwd_info *fwd_info = NULL; |
| 1257 | |
| 1258 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 1259 | return; |
| 1260 | |
| 1261 | fwd_info = &peripheral_info[type][peripheral]; |
| 1262 | __diag_fwd_open(fwd_info); |
| 1263 | } |
| 1264 | |
| 1265 | void diagfwd_late_open(struct diagfwd_info *fwd_info) |
| 1266 | { |
| 1267 | __diag_fwd_open(fwd_info); |
| 1268 | } |
| 1269 | |
| 1270 | void diagfwd_close(uint8_t peripheral, uint8_t type) |
| 1271 | { |
| 1272 | struct diagfwd_info *fwd_info = NULL; |
| 1273 | |
| 1274 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 1275 | return; |
| 1276 | |
| 1277 | fwd_info = &peripheral_info[type][peripheral]; |
| 1278 | atomic_set(&fwd_info->opened, 0); |
| 1279 | if (!fwd_info->inited) |
| 1280 | return; |
| 1281 | |
| 1282 | if (fwd_info->p_ops && fwd_info->p_ops->close) |
| 1283 | fwd_info->p_ops->close(fwd_info->ctxt); |
| 1284 | |
| 1285 | if (fwd_info->buf_1) |
| 1286 | atomic_set(&fwd_info->buf_1->in_busy, 1); |
| 1287 | /* |
| 1288 | * Only Data channels have two buffers. Set both the buffers |
| 1289 | * to busy on close. |
| 1290 | */ |
| 1291 | if (fwd_info->buf_2) |
| 1292 | atomic_set(&fwd_info->buf_2->in_busy, 1); |
| 1293 | } |
| 1294 | |
| 1295 | int diagfwd_channel_open(struct diagfwd_info *fwd_info) |
| 1296 | { |
| 1297 | int i; |
| 1298 | |
| 1299 | if (!fwd_info) |
| 1300 | return -EIO; |
| 1301 | |
| 1302 | if (!fwd_info->inited) { |
| 1303 | pr_debug("diag: In %s, channel is not inited, p: %d, t: %d\n", |
| 1304 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1305 | return -EINVAL; |
| 1306 | } |
| 1307 | |
| 1308 | if (fwd_info->ch_open) { |
| 1309 | pr_debug("diag: In %s, channel is already open, p: %d, t: %d\n", |
| 1310 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1311 | return 0; |
| 1312 | } |
Manoj Prabhu B | b989d56 | 2017-06-28 11:36:20 +0530 | [diff] [blame] | 1313 | mutex_lock(&driver->diagfwd_channel_mutex[fwd_info->peripheral]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1314 | fwd_info->ch_open = 1; |
| 1315 | diagfwd_buffers_init(fwd_info); |
Manoj Prabhu B | 8ee172f | 2017-07-14 14:34:26 +0530 | [diff] [blame] | 1316 | |
| 1317 | /* |
Manoj Prabhu B | 0e53553 | 2017-08-24 09:56:03 +0530 | [diff] [blame] | 1318 | * Initialize buffers for glink supported |
| 1319 | * peripherals only. |
Manoj Prabhu B | 8ee172f | 2017-07-14 14:34:26 +0530 | [diff] [blame] | 1320 | */ |
Manoj Prabhu B | 0e53553 | 2017-08-24 09:56:03 +0530 | [diff] [blame] | 1321 | if (fwd_info->transport == TRANSPORT_GLINK) |
Manoj Prabhu B | 8ee172f | 2017-07-14 14:34:26 +0530 | [diff] [blame] | 1322 | diagfwd_write_buffers_init(fwd_info); |
Manoj Prabhu B | 8ee172f | 2017-07-14 14:34:26 +0530 | [diff] [blame] | 1323 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1324 | if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->open) |
| 1325 | fwd_info->c_ops->open(fwd_info); |
| 1326 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 1327 | if (fwd_info->buf_ptr[i]) |
| 1328 | atomic_set(&fwd_info->buf_ptr[i]->in_busy, 0); |
| 1329 | } |
| 1330 | diagfwd_queue_read(fwd_info); |
| 1331 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "p: %d t: %d considered opened\n", |
| 1332 | fwd_info->peripheral, fwd_info->type); |
| 1333 | |
| 1334 | if (atomic_read(&fwd_info->opened)) { |
| 1335 | if (fwd_info->p_ops && fwd_info->p_ops->open) |
| 1336 | fwd_info->p_ops->open(fwd_info->ctxt); |
| 1337 | } |
Manoj Prabhu B | b989d56 | 2017-06-28 11:36:20 +0530 | [diff] [blame] | 1338 | mutex_unlock(&driver->diagfwd_channel_mutex[fwd_info->peripheral]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1339 | return 0; |
| 1340 | } |
| 1341 | |
| 1342 | int diagfwd_channel_close(struct diagfwd_info *fwd_info) |
| 1343 | { |
| 1344 | int i; |
| 1345 | |
| 1346 | if (!fwd_info) |
| 1347 | return -EIO; |
| 1348 | |
Mohit Aggarwal | aea1a72 | 2017-07-24 14:03:56 +0530 | [diff] [blame] | 1349 | if (fwd_info->type == TYPE_CNTL) |
| 1350 | flush_workqueue(driver->cntl_wq); |
| 1351 | |
Manoj Prabhu B | b989d56 | 2017-06-28 11:36:20 +0530 | [diff] [blame] | 1352 | mutex_lock(&driver->diagfwd_channel_mutex[fwd_info->peripheral]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1353 | fwd_info->ch_open = 0; |
| 1354 | if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->close) |
| 1355 | fwd_info->c_ops->close(fwd_info); |
| 1356 | |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1357 | if (fwd_info->buf_1 && fwd_info->buf_1->data) { |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1358 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1359 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1360 | "Buffer 1 for core PD is marked free, p: %d, t: %d\n", |
| 1361 | fwd_info->peripheral, fwd_info->type); |
| 1362 | } |
| 1363 | if (fwd_info->buf_2 && fwd_info->buf_2->data) { |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1364 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1365 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1366 | "Buffer 2 for core PD is marked free, p: %d, t: %d\n", |
| 1367 | fwd_info->peripheral, fwd_info->type); |
| 1368 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1369 | |
| 1370 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 1371 | if (fwd_info->buf_ptr[i]) |
| 1372 | atomic_set(&fwd_info->buf_ptr[i]->in_busy, 1); |
| 1373 | } |
| 1374 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "p: %d t: %d considered closed\n", |
| 1375 | fwd_info->peripheral, fwd_info->type); |
Manoj Prabhu B | b989d56 | 2017-06-28 11:36:20 +0530 | [diff] [blame] | 1376 | mutex_unlock(&driver->diagfwd_channel_mutex[fwd_info->peripheral]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1377 | return 0; |
| 1378 | } |
| 1379 | |
| 1380 | int diagfwd_channel_read_done(struct diagfwd_info *fwd_info, |
| 1381 | unsigned char *buf, uint32_t len) |
| 1382 | { |
| 1383 | if (!fwd_info) { |
| 1384 | diag_ws_release(); |
| 1385 | return -EIO; |
| 1386 | } |
| 1387 | |
| 1388 | /* |
| 1389 | * Diag peripheral layers should send len as 0 if there is any error |
| 1390 | * in reading data from the transport. Use this information to reset the |
| 1391 | * in_busy flags. No need to queue read in this case. |
| 1392 | */ |
| 1393 | if (len == 0) { |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1394 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1395 | "Read Length is 0, resetting the diag buffers p: %d, t: %d\n", |
| 1396 | fwd_info->peripheral, fwd_info->type); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1397 | diagfwd_reset_buffers(fwd_info, buf); |
| 1398 | diag_ws_release(); |
| 1399 | return 0; |
| 1400 | } |
| 1401 | |
| 1402 | if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->read_done) |
| 1403 | fwd_info->c_ops->read_done(fwd_info, buf, len); |
| 1404 | fwd_info->read_bytes += len; |
| 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1409 | void diagfwd_write_done(uint8_t peripheral, uint8_t type, int buf_num) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1410 | { |
Manoj Prabhu B | 37c77c0 | 2017-09-18 11:38:48 +0530 | [diff] [blame] | 1411 | int i = 0, upd_valid_len = 0; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1412 | struct diagfwd_info *fwd_info = NULL; |
| 1413 | |
| 1414 | if (peripheral >= NUM_PERIPHERALS || type >= NUM_TYPES) |
| 1415 | return; |
| 1416 | |
| 1417 | fwd_info = &peripheral_info[type][peripheral]; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1418 | if (!fwd_info) |
| 1419 | return; |
| 1420 | |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1421 | if (buf_num == 1 && fwd_info->buf_1) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1422 | /* |
| 1423 | * Core PD buffer data is processed and |
| 1424 | * length in the buffer is marked zero. |
| 1425 | * |
| 1426 | * Check if the user PD buffer contains any |
| 1427 | * data before freeing core PD buffer. |
| 1428 | */ |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1429 | fwd_info->cpd_len_1 = 0; |
Manoj Prabhu B | 37c77c0 | 2017-09-18 11:38:48 +0530 | [diff] [blame] | 1430 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
| 1431 | if (fwd_info->upd_len[i][0]) { |
| 1432 | upd_valid_len = 1; |
| 1433 | break; |
| 1434 | } |
| 1435 | } |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1436 | /* |
| 1437 | * Do not free the core pd buffer if valid data |
| 1438 | * is present in any user PD buffer. |
| 1439 | */ |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1440 | if (!upd_valid_len) { |
Manoj Prabhu B | 37c77c0 | 2017-09-18 11:38:48 +0530 | [diff] [blame] | 1441 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1442 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1443 | "Buffer 1 for core PD is marked free, p: %d, t: %d, buf_num: %d\n", |
| 1444 | fwd_info->peripheral, fwd_info->type, buf_num); |
| 1445 | } |
| 1446 | } else if (buf_num == 2 && fwd_info->buf_2) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1447 | /* |
| 1448 | * Core PD buffer data is processed and |
| 1449 | * length in the buffer is marked zero. |
| 1450 | * |
| 1451 | * Check if the user PD buffer contains any |
| 1452 | * data before freeing core PD buffer. |
| 1453 | */ |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1454 | fwd_info->cpd_len_2 = 0; |
Manoj Prabhu B | 37c77c0 | 2017-09-18 11:38:48 +0530 | [diff] [blame] | 1455 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
| 1456 | if (fwd_info->upd_len[i][1]) { |
| 1457 | upd_valid_len = 1; |
| 1458 | break; |
| 1459 | } |
| 1460 | } |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1461 | /* |
| 1462 | * Do not free the core pd buffer if valid data |
| 1463 | * is present in any user PD buffer |
| 1464 | */ |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1465 | if (!upd_valid_len) { |
Manoj Prabhu B | 37c77c0 | 2017-09-18 11:38:48 +0530 | [diff] [blame] | 1466 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1467 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1468 | "Buffer 2 for core PD is marked free, p: %d, t: %d, buf_num: %d\n", |
| 1469 | fwd_info->peripheral, fwd_info->type, buf_num); |
| 1470 | } |
| 1471 | } else if (buf_num >= 3 && (buf_num % 2)) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1472 | /* |
| 1473 | * Go through each User PD buffer, validate the |
| 1474 | * request for freeing the buffer by validating |
| 1475 | * the buffer number. |
| 1476 | * |
| 1477 | */ |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1478 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1479 | if (fwd_info->buf_upd[i][0] && |
| 1480 | (buf_num == ((2 * i) + 3))) { |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1481 | /* Buffer 1 for ith user PD is freed */ |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1482 | atomic_set(&fwd_info->buf_upd[i][0]->in_busy, |
| 1483 | 0); |
| 1484 | fwd_info->upd_len[i][0] = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1485 | } |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1486 | /* |
| 1487 | * Check if there is any data in user PD buffer other |
| 1488 | * than buffer requested for freeing. |
| 1489 | * |
| 1490 | */ |
| 1491 | if (fwd_info->upd_len[i][0]) |
| 1492 | upd_valid_len = 1; |
| 1493 | } |
| 1494 | /* |
| 1495 | * Mark the core pd buffer free if there is no |
| 1496 | * data present in core PD buffer and other User PD buffer. |
| 1497 | * |
| 1498 | */ |
| 1499 | if (!upd_valid_len && !fwd_info->cpd_len_1) { |
| 1500 | atomic_set(&fwd_info->buf_1->in_busy, 0); |
| 1501 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1502 | "Buffer 1 for core PD is marked free, p: %d, t: %d, buf_num: %d\n", |
| 1503 | fwd_info->peripheral, fwd_info->type, buf_num); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1504 | } |
Hardik Arya | 53bf345 | 2017-09-06 15:34:19 +0530 | [diff] [blame] | 1505 | } else if (buf_num >= 4 && !(buf_num % 2)) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1506 | /* |
| 1507 | * Go through each User PD buffer, validate the |
| 1508 | * request for freeing the buffer by validating |
| 1509 | * the buffer number. |
| 1510 | * |
| 1511 | */ |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1512 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1513 | if (fwd_info->buf_upd[i][1] && |
| 1514 | (buf_num == ((2 * i) + 4))) { |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1515 | /* Buffer 2 for ith user PD is freed */ |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1516 | atomic_set(&fwd_info->buf_upd[i][1]->in_busy, |
| 1517 | 0); |
| 1518 | fwd_info->upd_len[i][1] = 0; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1519 | } |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1520 | /* |
| 1521 | * Check if there is any data in user PD buffer other |
| 1522 | * than buffer requested for freeing. |
| 1523 | * |
| 1524 | */ |
| 1525 | if (fwd_info->upd_len[i][1]) |
| 1526 | upd_valid_len = 1; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1527 | } |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1528 | /* |
| 1529 | * Mark the core pd buffer free if there is no |
| 1530 | * data present in core PD buffer and other User PD buffer. |
| 1531 | * |
| 1532 | */ |
| 1533 | if (!upd_valid_len && !fwd_info->cpd_len_2) { |
| 1534 | atomic_set(&fwd_info->buf_2->in_busy, 0); |
| 1535 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1536 | "Buffer 2 for core PD is marked free, p: %d, t: %d, buf_num: %d\n", |
| 1537 | fwd_info->peripheral, fwd_info->type, buf_num); |
| 1538 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1539 | } else |
Manoj Prabhu B | 90e1f50 | 2017-11-02 20:01:45 +0530 | [diff] [blame] | 1540 | pr_err("diag: In %s, invalid buf_num %d\n", __func__, buf_num); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1541 | |
| 1542 | diagfwd_queue_read(fwd_info); |
| 1543 | } |
| 1544 | |
| 1545 | int diagfwd_write_buffer_done(struct diagfwd_info *fwd_info, const void *ptr) |
| 1546 | { |
| 1547 | |
| 1548 | int found = 0; |
| 1549 | int index = 0; |
| 1550 | unsigned long flags; |
| 1551 | |
| 1552 | if (!fwd_info || !ptr) |
| 1553 | return found; |
| 1554 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 1555 | for (index = 0; index < NUM_WRITE_BUFFERS; index++) { |
| 1556 | if (fwd_info->buf_ptr[index]->data == ptr) { |
| 1557 | atomic_set(&fwd_info->buf_ptr[index]->in_busy, 0); |
| 1558 | found = 1; |
| 1559 | break; |
| 1560 | } |
| 1561 | } |
| 1562 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1563 | return found; |
| 1564 | } |
| 1565 | |
| 1566 | void diagfwd_channel_read(struct diagfwd_info *fwd_info) |
| 1567 | { |
| 1568 | int err = 0; |
| 1569 | uint32_t read_len = 0; |
| 1570 | unsigned char *read_buf = NULL; |
| 1571 | struct diagfwd_buf_t *temp_buf = NULL; |
| 1572 | |
| 1573 | if (!fwd_info) { |
| 1574 | diag_ws_release(); |
| 1575 | return; |
| 1576 | } |
| 1577 | |
| 1578 | if (!fwd_info->inited || !atomic_read(&fwd_info->opened)) { |
| 1579 | pr_debug("diag: In %s, p: %d, t: %d, inited: %d, opened: %d ch_open: %d\n", |
| 1580 | __func__, fwd_info->peripheral, fwd_info->type, |
| 1581 | fwd_info->inited, atomic_read(&fwd_info->opened), |
| 1582 | fwd_info->ch_open); |
| 1583 | diag_ws_release(); |
| 1584 | return; |
| 1585 | } |
| 1586 | |
| 1587 | if (fwd_info->buf_1 && !atomic_read(&fwd_info->buf_1->in_busy)) { |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1588 | if (driver->feature[fwd_info->peripheral].encode_hdlc && |
| 1589 | (fwd_info->type == TYPE_DATA || |
| 1590 | fwd_info->type == TYPE_CMD)) { |
| 1591 | read_buf = fwd_info->buf_1->data_raw; |
| 1592 | read_len = fwd_info->buf_1->len_raw; |
| 1593 | } else { |
| 1594 | read_buf = fwd_info->buf_1->data; |
| 1595 | read_len = fwd_info->buf_1->len; |
| 1596 | } |
Mohit Aggarwal | 77f227d | 2016-11-24 13:48:12 +0530 | [diff] [blame] | 1597 | if (read_buf) { |
| 1598 | temp_buf = fwd_info->buf_1; |
| 1599 | atomic_set(&temp_buf->in_busy, 1); |
| 1600 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1601 | } else if (fwd_info->buf_2 && !atomic_read(&fwd_info->buf_2->in_busy)) { |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1602 | if (driver->feature[fwd_info->peripheral].encode_hdlc && |
| 1603 | (fwd_info->type == TYPE_DATA || |
| 1604 | fwd_info->type == TYPE_CMD)) { |
| 1605 | read_buf = fwd_info->buf_2->data_raw; |
| 1606 | read_len = fwd_info->buf_2->len_raw; |
| 1607 | } else { |
| 1608 | read_buf = fwd_info->buf_2->data; |
| 1609 | read_len = fwd_info->buf_2->len; |
| 1610 | } |
Mohit Aggarwal | 77f227d | 2016-11-24 13:48:12 +0530 | [diff] [blame] | 1611 | if (read_buf) { |
| 1612 | temp_buf = fwd_info->buf_2; |
| 1613 | atomic_set(&temp_buf->in_busy, 1); |
| 1614 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1615 | } else { |
| 1616 | pr_debug("diag: In %s, both buffers are empty for p: %d, t: %d\n", |
| 1617 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1618 | } |
| 1619 | |
| 1620 | if (!read_buf) { |
| 1621 | diag_ws_release(); |
| 1622 | return; |
| 1623 | } |
| 1624 | |
| 1625 | if (!(fwd_info->p_ops && fwd_info->p_ops->read && fwd_info->ctxt)) |
| 1626 | goto fail_return; |
| 1627 | |
| 1628 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "issued a read p: %d t: %d buf: %pK\n", |
| 1629 | fwd_info->peripheral, fwd_info->type, read_buf); |
| 1630 | err = fwd_info->p_ops->read(fwd_info->ctxt, read_buf, read_len); |
| 1631 | if (err) |
| 1632 | goto fail_return; |
| 1633 | |
| 1634 | return; |
| 1635 | |
| 1636 | fail_return: |
| 1637 | diag_ws_release(); |
| 1638 | atomic_set(&temp_buf->in_busy, 0); |
Hardik Arya | fe005cc | 2017-12-01 12:31:58 +0530 | [diff] [blame] | 1639 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 1640 | "Buffer for core PD is marked free, p: %d, t: %d, buf_num: %d\n", |
| 1641 | fwd_info->peripheral, fwd_info->type, |
| 1642 | GET_BUF_NUM(temp_buf->ctxt)); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1643 | } |
| 1644 | |
| 1645 | static void diagfwd_queue_read(struct diagfwd_info *fwd_info) |
| 1646 | { |
| 1647 | if (!fwd_info) |
| 1648 | return; |
| 1649 | |
| 1650 | if (!fwd_info->inited || !atomic_read(&fwd_info->opened)) { |
| 1651 | pr_debug("diag: In %s, p: %d, t: %d, inited: %d, opened: %d ch_open: %d\n", |
| 1652 | __func__, fwd_info->peripheral, fwd_info->type, |
| 1653 | fwd_info->inited, atomic_read(&fwd_info->opened), |
| 1654 | fwd_info->ch_open); |
| 1655 | return; |
| 1656 | } |
| 1657 | |
| 1658 | /* |
| 1659 | * Don't queue a read on the data and command channels before receiving |
| 1660 | * the feature mask from the peripheral. We won't know which buffer to |
| 1661 | * use - HDLC or non HDLC buffer for reading. |
| 1662 | */ |
| 1663 | if ((!driver->feature[fwd_info->peripheral].rcvd_feature_mask) && |
| 1664 | (fwd_info->type != TYPE_CNTL)) { |
| 1665 | return; |
| 1666 | } |
| 1667 | |
| 1668 | if (fwd_info->p_ops && fwd_info->p_ops->queue_read && fwd_info->ctxt) |
| 1669 | fwd_info->p_ops->queue_read(fwd_info->ctxt); |
| 1670 | } |
| 1671 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1672 | static int diagfwd_buffers_allocate(struct diagfwd_info *fwd_info) |
| 1673 | { |
| 1674 | int i, j; |
| 1675 | |
| 1676 | for (i = 0; ((fwd_info->num_pd > 1) && |
| 1677 | (i <= (fwd_info->num_pd - 2))); i++) { |
| 1678 | for (j = 0; j < NUM_WRITE_BUFFERS; j++) { |
| 1679 | if (!fwd_info->buf_upd[i][j]) { |
| 1680 | fwd_info->buf_upd[i][j] = |
| 1681 | kzalloc(sizeof(struct diagfwd_buf_t), |
| 1682 | GFP_KERNEL); |
| 1683 | if (ZERO_OR_NULL_PTR(fwd_info->buf_upd[i][j])) |
| 1684 | return -ENOMEM; |
| 1685 | kmemleak_not_leak(fwd_info->buf_upd[i][j]); |
| 1686 | } |
| 1687 | |
| 1688 | if (fwd_info->buf_upd[i][j] && |
| 1689 | !fwd_info->buf_upd[i][j]->data) { |
| 1690 | fwd_info->buf_upd[i][j]->data = |
| 1691 | kzalloc(PERIPHERAL_BUF_SZ + |
| 1692 | APF_DIAG_PADDING, |
| 1693 | GFP_KERNEL); |
| 1694 | if (ZERO_OR_NULL_PTR( |
| 1695 | fwd_info->buf_upd[i][j]->data)) |
| 1696 | return -ENOMEM; |
| 1697 | fwd_info->buf_upd[i][j]->len = |
| 1698 | PERIPHERAL_BUF_SZ; |
| 1699 | kmemleak_not_leak( |
| 1700 | fwd_info->buf_upd[i][j]->data); |
| 1701 | fwd_info->buf_upd[i][j]->ctxt = |
| 1702 | SET_BUF_CTXT(fwd_info->peripheral, |
| 1703 | fwd_info->type, ((2 * i) + (j + 3))); |
| 1704 | } |
| 1705 | |
| 1706 | if (driver->supports_apps_hdlc_encoding) { |
| 1707 | if (fwd_info->buf_upd[i][j] && |
| 1708 | !fwd_info->buf_upd[i][j]->data_raw) { |
| 1709 | fwd_info->buf_upd[i][j]->data_raw = |
| 1710 | kzalloc(PERIPHERAL_BUF_SZ + |
| 1711 | APF_DIAG_PADDING, |
| 1712 | GFP_KERNEL); |
| 1713 | if (ZERO_OR_NULL_PTR( |
| 1714 | fwd_info->buf_upd[i][j]->data_raw)) |
| 1715 | return -ENOMEM; |
| 1716 | fwd_info->buf_upd[i][j]->len_raw = |
| 1717 | PERIPHERAL_BUF_SZ; |
| 1718 | kmemleak_not_leak( |
| 1719 | fwd_info->buf_upd[i][j]->data_raw); |
| 1720 | } |
| 1721 | } |
| 1722 | } |
| 1723 | } |
| 1724 | return 0; |
| 1725 | } |
| 1726 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1727 | void diagfwd_buffers_init(struct diagfwd_info *fwd_info) |
| 1728 | { |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1729 | int ret = 0; |
| 1730 | unsigned char *temp_char_buf; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1731 | |
| 1732 | if (!fwd_info) |
| 1733 | return; |
| 1734 | |
| 1735 | if (!fwd_info->inited) { |
| 1736 | pr_err("diag: In %s, channel not inited, p: %d, t: %d\n", |
| 1737 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1738 | return; |
| 1739 | } |
| 1740 | |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1741 | mutex_lock(&fwd_info->buf_mutex); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1742 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1743 | if (!fwd_info->buf_1) { |
| 1744 | fwd_info->buf_1 = kzalloc(sizeof(struct diagfwd_buf_t), |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1745 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1746 | if (ZERO_OR_NULL_PTR(fwd_info->buf_1)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1747 | goto err; |
| 1748 | kmemleak_not_leak(fwd_info->buf_1); |
| 1749 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1750 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1751 | if (!fwd_info->buf_1->data) { |
| 1752 | fwd_info->buf_1->data = kzalloc(PERIPHERAL_BUF_SZ + |
| 1753 | APF_DIAG_PADDING, |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1754 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1755 | if (ZERO_OR_NULL_PTR(fwd_info->buf_1->data)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1756 | goto err; |
| 1757 | fwd_info->buf_1->len = PERIPHERAL_BUF_SZ; |
| 1758 | kmemleak_not_leak(fwd_info->buf_1->data); |
| 1759 | fwd_info->buf_1->ctxt = SET_BUF_CTXT(fwd_info->peripheral, |
| 1760 | fwd_info->type, 1); |
| 1761 | } |
| 1762 | |
| 1763 | if (fwd_info->type == TYPE_DATA) { |
| 1764 | if (!fwd_info->buf_2) { |
| 1765 | fwd_info->buf_2 = kzalloc(sizeof(struct diagfwd_buf_t), |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1766 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1767 | if (ZERO_OR_NULL_PTR(fwd_info->buf_2)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1768 | goto err; |
| 1769 | kmemleak_not_leak(fwd_info->buf_2); |
| 1770 | } |
| 1771 | |
| 1772 | if (!fwd_info->buf_2->data) { |
| 1773 | fwd_info->buf_2->data = kzalloc(PERIPHERAL_BUF_SZ + |
| 1774 | APF_DIAG_PADDING, |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1775 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1776 | if (ZERO_OR_NULL_PTR(fwd_info->buf_2->data)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1777 | goto err; |
| 1778 | fwd_info->buf_2->len = PERIPHERAL_BUF_SZ; |
| 1779 | kmemleak_not_leak(fwd_info->buf_2->data); |
| 1780 | fwd_info->buf_2->ctxt = SET_BUF_CTXT( |
| 1781 | fwd_info->peripheral, |
| 1782 | fwd_info->type, 2); |
| 1783 | } |
| 1784 | |
Manoj Prabhu B | 0e53553 | 2017-08-24 09:56:03 +0530 | [diff] [blame] | 1785 | if (driver->feature[fwd_info->peripheral].untag_header) { |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1786 | ret = diagfwd_buffers_allocate(fwd_info); |
| 1787 | if (ret) |
| 1788 | goto err; |
Manoj Prabhu B | 0e53553 | 2017-08-24 09:56:03 +0530 | [diff] [blame] | 1789 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1790 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1791 | if (driver->supports_apps_hdlc_encoding) { |
| 1792 | /* In support of hdlc encoding */ |
| 1793 | if (!fwd_info->buf_1->data_raw) { |
| 1794 | fwd_info->buf_1->data_raw = |
| 1795 | kzalloc(PERIPHERAL_BUF_SZ + |
| 1796 | APF_DIAG_PADDING, |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1797 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1798 | temp_char_buf = |
| 1799 | fwd_info->buf_1->data_raw; |
| 1800 | if (ZERO_OR_NULL_PTR(temp_char_buf)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1801 | goto err; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1802 | fwd_info->buf_1->len_raw = |
| 1803 | PERIPHERAL_BUF_SZ; |
| 1804 | kmemleak_not_leak(temp_char_buf); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1805 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1806 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1807 | if (!fwd_info->buf_2->data_raw) { |
| 1808 | fwd_info->buf_2->data_raw = |
| 1809 | kzalloc(PERIPHERAL_BUF_SZ + |
| 1810 | APF_DIAG_PADDING, |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1811 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1812 | temp_char_buf = |
| 1813 | fwd_info->buf_2->data_raw; |
| 1814 | if (ZERO_OR_NULL_PTR(temp_char_buf)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1815 | goto err; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1816 | fwd_info->buf_2->len_raw = |
| 1817 | PERIPHERAL_BUF_SZ; |
| 1818 | kmemleak_not_leak(temp_char_buf); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1819 | } |
| 1820 | } |
| 1821 | } |
| 1822 | |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1823 | if (fwd_info->type == TYPE_CMD && |
| 1824 | driver->supports_apps_hdlc_encoding) { |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1825 | /* In support of hdlc encoding */ |
| 1826 | if (!fwd_info->buf_1->data_raw) { |
| 1827 | fwd_info->buf_1->data_raw = kzalloc(PERIPHERAL_BUF_SZ + |
| 1828 | APF_DIAG_PADDING, |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1829 | GFP_KERNEL); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1830 | temp_char_buf = |
| 1831 | fwd_info->buf_1->data_raw; |
| 1832 | if (ZERO_OR_NULL_PTR(temp_char_buf)) |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1833 | goto err; |
| 1834 | fwd_info->buf_1->len_raw = PERIPHERAL_BUF_SZ; |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1835 | kmemleak_not_leak(temp_char_buf); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1836 | } |
| 1837 | } |
| 1838 | |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1839 | mutex_unlock(&fwd_info->buf_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1840 | return; |
| 1841 | |
| 1842 | err: |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1843 | mutex_unlock(&fwd_info->buf_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1844 | diagfwd_buffers_exit(fwd_info); |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1845 | return; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1846 | } |
| 1847 | |
| 1848 | static void diagfwd_buffers_exit(struct diagfwd_info *fwd_info) |
| 1849 | { |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1850 | int i = 0; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1851 | |
| 1852 | if (!fwd_info) |
| 1853 | return; |
| 1854 | |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1855 | mutex_lock(&fwd_info->buf_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1856 | if (fwd_info->buf_1) { |
| 1857 | kfree(fwd_info->buf_1->data); |
| 1858 | fwd_info->buf_1->data = NULL; |
| 1859 | kfree(fwd_info->buf_1->data_raw); |
| 1860 | fwd_info->buf_1->data_raw = NULL; |
| 1861 | kfree(fwd_info->buf_1); |
| 1862 | fwd_info->buf_1 = NULL; |
| 1863 | } |
| 1864 | if (fwd_info->buf_2) { |
| 1865 | kfree(fwd_info->buf_2->data); |
| 1866 | fwd_info->buf_2->data = NULL; |
| 1867 | kfree(fwd_info->buf_2->data_raw); |
| 1868 | fwd_info->buf_2->data_raw = NULL; |
| 1869 | kfree(fwd_info->buf_2); |
| 1870 | fwd_info->buf_2 = NULL; |
| 1871 | } |
Manoj Prabhu B | 571cf42 | 2017-08-08 19:01:41 +0530 | [diff] [blame] | 1872 | for (i = 0; i <= (fwd_info->num_pd - 2); i++) { |
| 1873 | if (fwd_info->buf_upd[i][0]) { |
| 1874 | kfree(fwd_info->buf_upd[i][0]->data); |
| 1875 | fwd_info->buf_upd[i][0]->data = NULL; |
| 1876 | kfree(fwd_info->buf_upd[i][0]->data_raw); |
| 1877 | fwd_info->buf_upd[i][0]->data_raw = NULL; |
| 1878 | kfree(fwd_info->buf_upd[i][0]); |
| 1879 | fwd_info->buf_upd[i][0] = NULL; |
| 1880 | } |
| 1881 | if (fwd_info->buf_upd[i][1]) { |
| 1882 | kfree(fwd_info->buf_upd[i][1]->data); |
| 1883 | fwd_info->buf_upd[i][1]->data = NULL; |
| 1884 | kfree(fwd_info->buf_upd[i][1]->data_raw); |
| 1885 | fwd_info->buf_upd[i][1]->data_raw = NULL; |
| 1886 | kfree(fwd_info->buf_upd[i][1]); |
| 1887 | fwd_info->buf_upd[i][1] = NULL; |
| 1888 | } |
| 1889 | } |
Sreelakshmi Gownipalli | ae6c8e8 | 2016-11-29 16:01:13 -0800 | [diff] [blame] | 1890 | mutex_unlock(&fwd_info->buf_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1891 | } |
| 1892 | |
| 1893 | void diagfwd_write_buffers_init(struct diagfwd_info *fwd_info) |
| 1894 | { |
| 1895 | unsigned long flags; |
| 1896 | int i; |
| 1897 | |
| 1898 | if (!fwd_info) |
| 1899 | return; |
| 1900 | |
| 1901 | if (!fwd_info->inited) { |
| 1902 | pr_err("diag: In %s, channel not inited, p: %d, t: %d\n", |
| 1903 | __func__, fwd_info->peripheral, fwd_info->type); |
| 1904 | return; |
| 1905 | } |
| 1906 | |
| 1907 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 1908 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 1909 | if (!fwd_info->buf_ptr[i]) |
| 1910 | fwd_info->buf_ptr[i] = |
| 1911 | kzalloc(sizeof(struct diagfwd_buf_t), |
| 1912 | GFP_ATOMIC); |
| 1913 | if (!fwd_info->buf_ptr[i]) |
| 1914 | goto err; |
| 1915 | kmemleak_not_leak(fwd_info->buf_ptr[i]); |
| 1916 | if (!fwd_info->buf_ptr[i]->data) { |
| 1917 | fwd_info->buf_ptr[i]->data = kzalloc(PERIPHERAL_BUF_SZ, |
| 1918 | GFP_ATOMIC); |
| 1919 | if (!fwd_info->buf_ptr[i]->data) |
| 1920 | goto err; |
| 1921 | fwd_info->buf_ptr[i]->len = PERIPHERAL_BUF_SZ; |
| 1922 | kmemleak_not_leak(fwd_info->buf_ptr[i]->data); |
| 1923 | } |
| 1924 | } |
| 1925 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1926 | return; |
| 1927 | |
| 1928 | err: |
| 1929 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1930 | pr_err("diag:unable to allocate write buffers\n"); |
| 1931 | diagfwd_write_buffers_exit(fwd_info); |
| 1932 | |
| 1933 | } |
| 1934 | |
| 1935 | static void diagfwd_write_buffers_exit(struct diagfwd_info *fwd_info) |
| 1936 | { |
| 1937 | unsigned long flags; |
| 1938 | int i; |
| 1939 | |
| 1940 | if (!fwd_info) |
| 1941 | return; |
| 1942 | |
| 1943 | spin_lock_irqsave(&fwd_info->write_buf_lock, flags); |
| 1944 | for (i = 0; i < NUM_WRITE_BUFFERS; i++) { |
| 1945 | if (fwd_info->buf_ptr[i]) { |
| 1946 | kfree(fwd_info->buf_ptr[i]->data); |
| 1947 | fwd_info->buf_ptr[i]->data = NULL; |
| 1948 | kfree(fwd_info->buf_ptr[i]); |
| 1949 | fwd_info->buf_ptr[i] = NULL; |
| 1950 | } |
| 1951 | } |
| 1952 | spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags); |
| 1953 | } |