Raju P.L.S.S.S.N | 43c1be7 | 2017-10-31 16:50:30 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2012-2017, 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 | */ |
| 13 | |
| 14 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 15 | |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/types.h> |
| 19 | #include <linux/bug.h> |
| 20 | #include <linux/completion.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/io.h> |
| 25 | #include <linux/irq.h> |
| 26 | #include <linux/list.h> |
| 27 | #include <linux/mutex.h> |
| 28 | #include <linux/of_address.h> |
| 29 | #include <linux/spinlock.h> |
| 30 | #include <linux/string.h> |
| 31 | #include <linux/device.h> |
| 32 | #include <linux/notifier.h> |
| 33 | #include <linux/slab.h> |
Raju P.L.S.S.S.N | 43c1be7 | 2017-10-31 16:50:30 +0530 | [diff] [blame] | 34 | #include <linux/platform_device.h> |
| 35 | #include <linux/of.h> |
| 36 | #include <linux/of_platform.h> |
| 37 | #include <linux/rbtree.h> |
| 38 | #include <soc/qcom/rpm-notifier.h> |
| 39 | #include <soc/qcom/rpm-smd.h> |
| 40 | #include <soc/qcom/smd.h> |
| 41 | #include <soc/qcom/glink_rpm_xprt.h> |
| 42 | #include <soc/qcom/glink.h> |
| 43 | |
| 44 | #define CREATE_TRACE_POINTS |
| 45 | #include <trace/events/trace_rpm_smd.h> |
| 46 | |
| 47 | /* Debug Definitions */ |
| 48 | enum { |
| 49 | MSM_RPM_LOG_REQUEST_PRETTY = BIT(0), |
| 50 | MSM_RPM_LOG_REQUEST_RAW = BIT(1), |
| 51 | MSM_RPM_LOG_REQUEST_SHOW_MSG_ID = BIT(2), |
| 52 | }; |
| 53 | |
| 54 | static int msm_rpm_debug_mask; |
| 55 | module_param_named( |
| 56 | debug_mask, msm_rpm_debug_mask, int, 0644 |
| 57 | ); |
| 58 | |
| 59 | struct msm_rpm_driver_data { |
| 60 | const char *ch_name; |
| 61 | uint32_t ch_type; |
| 62 | smd_channel_t *ch_info; |
| 63 | struct work_struct work; |
| 64 | spinlock_t smd_lock_write; |
| 65 | spinlock_t smd_lock_read; |
| 66 | struct completion smd_open; |
| 67 | }; |
| 68 | |
| 69 | struct glink_apps_rpm_data { |
| 70 | const char *name; |
| 71 | const char *edge; |
| 72 | const char *xprt; |
| 73 | void *glink_handle; |
| 74 | struct glink_link_info *link_info; |
| 75 | struct glink_open_config *open_cfg; |
| 76 | struct work_struct work; |
| 77 | }; |
| 78 | |
| 79 | static bool glink_enabled; |
| 80 | static struct glink_apps_rpm_data *glink_data; |
| 81 | |
| 82 | #define DEFAULT_BUFFER_SIZE 256 |
| 83 | #define DEBUG_PRINT_BUFFER_SIZE 512 |
| 84 | #define MAX_SLEEP_BUFFER 128 |
| 85 | #define GFP_FLAG(noirq) (noirq ? GFP_ATOMIC : GFP_NOIO) |
| 86 | #define INV_RSC "resource does not exist" |
| 87 | #define ERR "err\0" |
| 88 | #define MAX_ERR_BUFFER_SIZE 128 |
| 89 | #define MAX_WAIT_ON_ACK 24 |
| 90 | #define INIT_ERROR 1 |
| 91 | #define V1_PROTOCOL_VERSION 0x31726576 /* rev1 */ |
| 92 | #define V0_PROTOCOL_VERSION 0 /* rev0 */ |
| 93 | #define RPM_MSG_TYPE_OFFSET 16 |
| 94 | #define RPM_MSG_TYPE_SIZE 8 |
| 95 | #define RPM_SET_TYPE_OFFSET 28 |
| 96 | #define RPM_SET_TYPE_SIZE 4 |
| 97 | #define RPM_REQ_LEN_OFFSET 0 |
| 98 | #define RPM_REQ_LEN_SIZE 16 |
| 99 | #define RPM_MSG_VERSION_OFFSET 24 |
| 100 | #define RPM_MSG_VERSION_SIZE 8 |
| 101 | #define RPM_MSG_VERSION 1 |
| 102 | #define RPM_MSG_SET_OFFSET 28 |
| 103 | #define RPM_MSG_SET_SIZE 4 |
| 104 | #define RPM_RSC_ID_OFFSET 16 |
| 105 | #define RPM_RSC_ID_SIZE 12 |
| 106 | #define RPM_DATA_LEN_OFFSET 0 |
| 107 | #define RPM_DATA_LEN_SIZE 16 |
| 108 | #define RPM_HDR_SIZE ((rpm_msg_fmt_ver == RPM_MSG_V0_FMT) ?\ |
| 109 | sizeof(struct rpm_v0_hdr) : sizeof(struct rpm_v1_hdr)) |
| 110 | #define CLEAR_FIELD(offset, size) (~GENMASK(offset + size - 1, offset)) |
| 111 | |
| 112 | static ATOMIC_NOTIFIER_HEAD(msm_rpm_sleep_notifier); |
| 113 | static bool standalone; |
| 114 | static int probe_status = -EPROBE_DEFER; |
| 115 | static int msm_rpm_read_smd_data(char *buf); |
| 116 | static void msm_rpm_process_ack(uint32_t msg_id, int errno); |
| 117 | |
| 118 | int msm_rpm_register_notifier(struct notifier_block *nb) |
| 119 | { |
| 120 | return atomic_notifier_chain_register(&msm_rpm_sleep_notifier, nb); |
| 121 | } |
| 122 | |
| 123 | int msm_rpm_unregister_notifier(struct notifier_block *nb) |
| 124 | { |
| 125 | return atomic_notifier_chain_unregister(&msm_rpm_sleep_notifier, nb); |
| 126 | } |
| 127 | |
Raju P.L.S.S.S.N | 43c1be7 | 2017-10-31 16:50:30 +0530 | [diff] [blame] | 128 | enum { |
| 129 | MSM_RPM_MSG_REQUEST_TYPE = 0, |
| 130 | MSM_RPM_MSG_TYPE_NR, |
| 131 | }; |
| 132 | |
| 133 | static const uint32_t msm_rpm_request_service_v1[MSM_RPM_MSG_TYPE_NR] = { |
| 134 | 0x716572, /* 'req\0' */ |
| 135 | }; |
| 136 | |
| 137 | enum { |
| 138 | RPM_V1_REQUEST_SERVICE, |
| 139 | RPM_V1_SYSTEMDB_SERVICE, |
| 140 | RPM_V1_COMMAND_SERVICE, |
| 141 | RPM_V1_ACK_SERVICE, |
| 142 | RPM_V1_NACK_SERVICE, |
| 143 | } msm_rpm_request_service_v2; |
| 144 | |
| 145 | struct rpm_v0_hdr { |
| 146 | uint32_t service_type; |
| 147 | uint32_t request_len; |
| 148 | }; |
| 149 | |
| 150 | struct rpm_v1_hdr { |
| 151 | uint32_t request_hdr; |
| 152 | }; |
| 153 | |
| 154 | struct rpm_message_header_v0 { |
| 155 | struct rpm_v0_hdr hdr; |
| 156 | uint32_t msg_id; |
| 157 | enum msm_rpm_set set; |
| 158 | uint32_t resource_type; |
| 159 | uint32_t resource_id; |
| 160 | uint32_t data_len; |
| 161 | }; |
| 162 | |
| 163 | struct rpm_message_header_v1 { |
| 164 | struct rpm_v1_hdr hdr; |
| 165 | uint32_t msg_id; |
| 166 | uint32_t resource_type; |
| 167 | uint32_t request_details; |
| 168 | }; |
| 169 | |
| 170 | struct msm_rpm_ack_msg_v0 { |
| 171 | uint32_t req; |
| 172 | uint32_t req_len; |
| 173 | uint32_t rsc_id; |
| 174 | uint32_t msg_len; |
| 175 | uint32_t id_ack; |
| 176 | }; |
| 177 | |
| 178 | struct msm_rpm_ack_msg_v1 { |
| 179 | uint32_t request_hdr; |
| 180 | uint32_t id_ack; |
| 181 | }; |
| 182 | |
| 183 | struct kvp { |
| 184 | unsigned int k; |
| 185 | unsigned int s; |
| 186 | }; |
| 187 | |
| 188 | struct msm_rpm_kvp_data { |
| 189 | uint32_t key; |
| 190 | uint32_t nbytes; /* number of bytes */ |
| 191 | uint8_t *value; |
| 192 | bool valid; |
| 193 | }; |
| 194 | |
| 195 | struct slp_buf { |
| 196 | struct rb_node node; |
| 197 | char ubuf[MAX_SLEEP_BUFFER]; |
| 198 | char *buf; |
| 199 | bool valid; |
| 200 | }; |
| 201 | |
| 202 | enum rpm_msg_fmts { |
| 203 | RPM_MSG_V0_FMT, |
| 204 | RPM_MSG_V1_FMT |
| 205 | }; |
| 206 | |
| 207 | static uint32_t rpm_msg_fmt_ver; |
| 208 | module_param_named( |
| 209 | rpm_msg_fmt_ver, rpm_msg_fmt_ver, uint, 0444 |
| 210 | ); |
| 211 | |
| 212 | static struct rb_root tr_root = RB_ROOT; |
| 213 | static int (*msm_rpm_send_buffer)(char *buf, uint32_t size, bool noirq); |
| 214 | static int msm_rpm_send_smd_buffer(char *buf, uint32_t size, bool noirq); |
| 215 | static int msm_rpm_glink_send_buffer(char *buf, uint32_t size, bool noirq); |
| 216 | static uint32_t msm_rpm_get_next_msg_id(void); |
| 217 | |
| 218 | static inline uint32_t get_offset_value(uint32_t val, uint32_t offset, |
| 219 | uint32_t size) |
| 220 | { |
| 221 | return (((val) & GENMASK(offset + size - 1, offset)) |
| 222 | >> offset); |
| 223 | } |
| 224 | |
| 225 | static inline void change_offset_value(uint32_t *val, uint32_t offset, |
| 226 | uint32_t size, int32_t val1) |
| 227 | { |
| 228 | uint32_t member = *val; |
| 229 | uint32_t offset_val = get_offset_value(member, offset, size); |
| 230 | uint32_t mask = (1 << size) - 1; |
| 231 | |
| 232 | offset_val += val1; |
| 233 | *val &= CLEAR_FIELD(offset, size); |
| 234 | *val |= ((offset_val & mask) << offset); |
| 235 | } |
| 236 | |
| 237 | static inline void set_offset_value(uint32_t *val, uint32_t offset, |
| 238 | uint32_t size, uint32_t val1) |
| 239 | { |
| 240 | uint32_t mask = (1 << size) - 1; |
| 241 | |
| 242 | *val &= CLEAR_FIELD(offset, size); |
| 243 | *val |= ((val1 & mask) << offset); |
| 244 | } |
| 245 | static uint32_t get_msg_id(char *buf) |
| 246 | { |
| 247 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 248 | return ((struct rpm_message_header_v0 *)buf)->msg_id; |
| 249 | |
| 250 | return ((struct rpm_message_header_v1 *)buf)->msg_id; |
| 251 | |
| 252 | } |
| 253 | |
| 254 | static uint32_t get_ack_msg_id(char *buf) |
| 255 | { |
| 256 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 257 | return ((struct msm_rpm_ack_msg_v0 *)buf)->id_ack; |
| 258 | |
| 259 | return ((struct msm_rpm_ack_msg_v1 *)buf)->id_ack; |
| 260 | |
| 261 | } |
| 262 | |
| 263 | static uint32_t get_rsc_type(char *buf) |
| 264 | { |
| 265 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 266 | return ((struct rpm_message_header_v0 *)buf)->resource_type; |
| 267 | |
| 268 | return ((struct rpm_message_header_v1 *)buf)->resource_type; |
| 269 | |
| 270 | } |
| 271 | |
| 272 | static uint32_t get_set_type(char *buf) |
| 273 | { |
| 274 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 275 | return ((struct rpm_message_header_v0 *)buf)->set; |
| 276 | |
| 277 | return get_offset_value(((struct rpm_message_header_v1 *)buf)-> |
| 278 | request_details, RPM_SET_TYPE_OFFSET, |
| 279 | RPM_SET_TYPE_SIZE); |
| 280 | } |
| 281 | |
| 282 | static uint32_t get_data_len(char *buf) |
| 283 | { |
| 284 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 285 | return ((struct rpm_message_header_v0 *)buf)->data_len; |
| 286 | |
| 287 | return get_offset_value(((struct rpm_message_header_v1 *)buf)-> |
| 288 | request_details, RPM_DATA_LEN_OFFSET, |
| 289 | RPM_DATA_LEN_SIZE); |
| 290 | } |
| 291 | |
| 292 | static uint32_t get_rsc_id(char *buf) |
| 293 | { |
| 294 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 295 | return ((struct rpm_message_header_v0 *)buf)->resource_id; |
| 296 | |
| 297 | return get_offset_value(((struct rpm_message_header_v1 *)buf)-> |
| 298 | request_details, RPM_RSC_ID_OFFSET, |
| 299 | RPM_RSC_ID_SIZE); |
| 300 | } |
| 301 | |
| 302 | static uint32_t get_ack_req_len(char *buf) |
| 303 | { |
| 304 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 305 | return ((struct msm_rpm_ack_msg_v0 *)buf)->req_len; |
| 306 | |
| 307 | return get_offset_value(((struct msm_rpm_ack_msg_v1 *)buf)-> |
| 308 | request_hdr, RPM_REQ_LEN_OFFSET, |
| 309 | RPM_REQ_LEN_SIZE); |
| 310 | } |
| 311 | |
| 312 | static uint32_t get_ack_msg_type(char *buf) |
| 313 | { |
| 314 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 315 | return ((struct msm_rpm_ack_msg_v0 *)buf)->req; |
| 316 | |
| 317 | return get_offset_value(((struct msm_rpm_ack_msg_v1 *)buf)-> |
| 318 | request_hdr, RPM_MSG_TYPE_OFFSET, |
| 319 | RPM_MSG_TYPE_SIZE); |
| 320 | } |
| 321 | |
| 322 | static uint32_t get_req_len(char *buf) |
| 323 | { |
| 324 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 325 | return ((struct rpm_message_header_v0 *)buf)->hdr.request_len; |
| 326 | |
| 327 | return get_offset_value(((struct rpm_message_header_v1 *)buf)-> |
| 328 | hdr.request_hdr, RPM_REQ_LEN_OFFSET, |
| 329 | RPM_REQ_LEN_SIZE); |
| 330 | } |
| 331 | |
| 332 | static void set_msg_ver(char *buf, uint32_t val) |
| 333 | { |
| 334 | if (rpm_msg_fmt_ver) { |
| 335 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 336 | hdr.request_hdr, RPM_MSG_VERSION_OFFSET, |
| 337 | RPM_MSG_VERSION_SIZE, val); |
| 338 | } else { |
| 339 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 340 | hdr.request_hdr, RPM_MSG_VERSION_OFFSET, |
| 341 | RPM_MSG_VERSION_SIZE, 0); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | static void set_req_len(char *buf, uint32_t val) |
| 346 | { |
| 347 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) { |
| 348 | ((struct rpm_message_header_v0 *)buf)->hdr.request_len = val; |
| 349 | } else { |
| 350 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 351 | hdr.request_hdr, RPM_REQ_LEN_OFFSET, |
| 352 | RPM_REQ_LEN_SIZE, val); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | static void change_req_len(char *buf, int32_t val) |
| 357 | { |
| 358 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) { |
| 359 | ((struct rpm_message_header_v0 *)buf)->hdr.request_len += val; |
| 360 | } else { |
| 361 | change_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 362 | hdr.request_hdr, RPM_REQ_LEN_OFFSET, |
| 363 | RPM_REQ_LEN_SIZE, val); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | static void set_msg_type(char *buf, uint32_t val) |
| 368 | { |
| 369 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) { |
| 370 | ((struct rpm_message_header_v0 *)buf)->hdr.service_type = |
| 371 | msm_rpm_request_service_v1[val]; |
| 372 | } else { |
| 373 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 374 | hdr.request_hdr, RPM_MSG_TYPE_OFFSET, |
| 375 | RPM_MSG_TYPE_SIZE, RPM_V1_REQUEST_SERVICE); |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | static void set_rsc_id(char *buf, uint32_t val) |
| 380 | { |
| 381 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 382 | ((struct rpm_message_header_v0 *)buf)->resource_id = val; |
| 383 | else |
| 384 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 385 | request_details, RPM_RSC_ID_OFFSET, |
| 386 | RPM_RSC_ID_SIZE, val); |
| 387 | } |
| 388 | |
| 389 | static void set_data_len(char *buf, uint32_t val) |
| 390 | { |
| 391 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 392 | ((struct rpm_message_header_v0 *)buf)->data_len = val; |
| 393 | else |
| 394 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 395 | request_details, RPM_DATA_LEN_OFFSET, |
| 396 | RPM_DATA_LEN_SIZE, val); |
| 397 | } |
| 398 | static void change_data_len(char *buf, int32_t val) |
| 399 | { |
| 400 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 401 | ((struct rpm_message_header_v0 *)buf)->data_len += val; |
| 402 | else |
| 403 | change_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 404 | request_details, RPM_DATA_LEN_OFFSET, |
| 405 | RPM_DATA_LEN_SIZE, val); |
| 406 | } |
| 407 | |
| 408 | static void set_set_type(char *buf, uint32_t val) |
| 409 | { |
| 410 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 411 | ((struct rpm_message_header_v0 *)buf)->set = val; |
| 412 | else |
| 413 | set_offset_value(&((struct rpm_message_header_v1 *)buf)-> |
| 414 | request_details, RPM_SET_TYPE_OFFSET, |
| 415 | RPM_SET_TYPE_SIZE, val); |
| 416 | } |
| 417 | static void set_msg_id(char *buf, uint32_t val) |
| 418 | { |
| 419 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 420 | ((struct rpm_message_header_v0 *)buf)->msg_id = val; |
| 421 | else |
| 422 | ((struct rpm_message_header_v1 *)buf)->msg_id = val; |
| 423 | |
| 424 | } |
| 425 | |
| 426 | static void set_rsc_type(char *buf, uint32_t val) |
| 427 | { |
| 428 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 429 | ((struct rpm_message_header_v0 *)buf)->resource_type = val; |
| 430 | else |
| 431 | ((struct rpm_message_header_v1 *)buf)->resource_type = val; |
| 432 | } |
| 433 | |
| 434 | static inline int get_buf_len(char *buf) |
| 435 | { |
| 436 | return get_req_len(buf) + RPM_HDR_SIZE; |
| 437 | } |
| 438 | |
| 439 | static inline struct kvp *get_first_kvp(char *buf) |
| 440 | { |
| 441 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 442 | return (struct kvp *)(buf + |
| 443 | sizeof(struct rpm_message_header_v0)); |
| 444 | else |
| 445 | return (struct kvp *)(buf + |
| 446 | sizeof(struct rpm_message_header_v1)); |
| 447 | } |
| 448 | |
| 449 | static inline struct kvp *get_next_kvp(struct kvp *k) |
| 450 | { |
| 451 | return (struct kvp *)((void *)k + sizeof(*k) + k->s); |
| 452 | } |
| 453 | |
| 454 | static inline void *get_data(struct kvp *k) |
| 455 | { |
| 456 | return (void *)k + sizeof(*k); |
| 457 | } |
| 458 | |
| 459 | |
| 460 | static void delete_kvp(char *buf, struct kvp *d) |
| 461 | { |
| 462 | struct kvp *n; |
| 463 | int dec; |
| 464 | uint32_t size; |
| 465 | |
| 466 | n = get_next_kvp(d); |
| 467 | dec = (void *)n - (void *)d; |
| 468 | size = get_data_len(buf) - |
| 469 | ((void *)n - (void *)get_first_kvp(buf)); |
| 470 | |
| 471 | memcpy((void *)d, (void *)n, size); |
| 472 | |
| 473 | change_data_len(buf, -dec); |
| 474 | change_req_len(buf, -dec); |
| 475 | } |
| 476 | |
| 477 | static inline void update_kvp_data(struct kvp *dest, struct kvp *src) |
| 478 | { |
| 479 | memcpy(get_data(dest), get_data(src), src->s); |
| 480 | } |
| 481 | |
| 482 | static void add_kvp(char *buf, struct kvp *n) |
| 483 | { |
| 484 | int32_t inc = sizeof(*n) + n->s; |
| 485 | |
| 486 | if (get_req_len(buf) + inc > MAX_SLEEP_BUFFER) { |
| 487 | WARN_ON(get_req_len(buf) + inc > MAX_SLEEP_BUFFER); |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | memcpy(buf + get_buf_len(buf), n, inc); |
| 492 | |
| 493 | change_data_len(buf, inc); |
| 494 | change_req_len(buf, inc); |
| 495 | } |
| 496 | |
| 497 | static struct slp_buf *tr_search(struct rb_root *root, char *slp) |
| 498 | { |
| 499 | unsigned int type = get_rsc_type(slp); |
| 500 | unsigned int id = get_rsc_id(slp); |
| 501 | struct rb_node *node = root->rb_node; |
| 502 | |
| 503 | while (node) { |
| 504 | struct slp_buf *cur = rb_entry(node, struct slp_buf, node); |
| 505 | unsigned int ctype = get_rsc_type(cur->buf); |
| 506 | unsigned int cid = get_rsc_id(cur->buf); |
| 507 | |
| 508 | if (type < ctype) |
| 509 | node = node->rb_left; |
| 510 | else if (type > ctype) |
| 511 | node = node->rb_right; |
| 512 | else if (id < cid) |
| 513 | node = node->rb_left; |
| 514 | else if (id > cid) |
| 515 | node = node->rb_right; |
| 516 | else |
| 517 | return cur; |
| 518 | } |
| 519 | return NULL; |
| 520 | } |
| 521 | |
| 522 | static int tr_insert(struct rb_root *root, struct slp_buf *slp) |
| 523 | { |
| 524 | unsigned int type = get_rsc_type(slp->buf); |
| 525 | unsigned int id = get_rsc_id(slp->buf); |
| 526 | struct rb_node **node = &(root->rb_node), *parent = NULL; |
| 527 | |
| 528 | while (*node) { |
| 529 | struct slp_buf *curr = rb_entry(*node, struct slp_buf, node); |
| 530 | unsigned int ctype = get_rsc_type(curr->buf); |
| 531 | unsigned int cid = get_rsc_id(curr->buf); |
| 532 | |
| 533 | parent = *node; |
| 534 | |
| 535 | if (type < ctype) |
| 536 | node = &((*node)->rb_left); |
| 537 | else if (type > ctype) |
| 538 | node = &((*node)->rb_right); |
| 539 | else if (id < cid) |
| 540 | node = &((*node)->rb_left); |
| 541 | else if (id > cid) |
| 542 | node = &((*node)->rb_right); |
| 543 | else |
| 544 | return -EINVAL; |
| 545 | } |
| 546 | |
| 547 | rb_link_node(&slp->node, parent, node); |
| 548 | rb_insert_color(&slp->node, root); |
| 549 | slp->valid = true; |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | #define for_each_kvp(buf, k) \ |
| 554 | for (k = (struct kvp *)get_first_kvp(buf); \ |
| 555 | ((void *)k - (void *)get_first_kvp(buf)) < \ |
| 556 | get_data_len(buf);\ |
| 557 | k = get_next_kvp(k)) |
| 558 | |
| 559 | |
| 560 | static void tr_update(struct slp_buf *s, char *buf) |
| 561 | { |
| 562 | struct kvp *e, *n; |
| 563 | |
| 564 | for_each_kvp(buf, n) { |
| 565 | bool found = false; |
| 566 | |
| 567 | for_each_kvp(s->buf, e) { |
| 568 | if (n->k == e->k) { |
| 569 | found = true; |
| 570 | if (n->s == e->s) { |
| 571 | void *e_data = get_data(e); |
| 572 | void *n_data = get_data(n); |
| 573 | |
| 574 | if (memcmp(e_data, n_data, n->s)) { |
| 575 | update_kvp_data(e, n); |
| 576 | s->valid = true; |
| 577 | } |
| 578 | } else { |
| 579 | delete_kvp(s->buf, e); |
| 580 | add_kvp(s->buf, n); |
| 581 | s->valid = true; |
| 582 | } |
| 583 | break; |
| 584 | } |
| 585 | |
| 586 | } |
| 587 | if (!found) { |
| 588 | add_kvp(s->buf, n); |
| 589 | s->valid = true; |
| 590 | } |
| 591 | } |
| 592 | } |
| 593 | static atomic_t msm_rpm_msg_id = ATOMIC_INIT(0); |
| 594 | |
| 595 | struct msm_rpm_request { |
| 596 | uint8_t *client_buf; |
| 597 | struct msm_rpm_kvp_data *kvp; |
| 598 | uint32_t num_elements; |
| 599 | uint32_t write_idx; |
| 600 | uint8_t *buf; |
| 601 | uint32_t numbytes; |
| 602 | }; |
| 603 | |
| 604 | /* |
| 605 | * Data related to message acknowledgment |
| 606 | */ |
| 607 | |
| 608 | LIST_HEAD(msm_rpm_wait_list); |
| 609 | |
| 610 | struct msm_rpm_wait_data { |
| 611 | struct list_head list; |
| 612 | uint32_t msg_id; |
| 613 | bool ack_recd; |
| 614 | int errno; |
| 615 | struct completion ack; |
| 616 | bool delete_on_ack; |
| 617 | }; |
| 618 | DEFINE_SPINLOCK(msm_rpm_list_lock); |
| 619 | |
| 620 | |
| 621 | |
| 622 | LIST_HEAD(msm_rpm_ack_list); |
| 623 | |
| 624 | static struct tasklet_struct data_tasklet; |
| 625 | |
| 626 | static inline uint32_t msm_rpm_get_msg_id_from_ack(uint8_t *buf) |
| 627 | { |
| 628 | return get_ack_msg_id(buf); |
| 629 | } |
| 630 | |
| 631 | static inline int msm_rpm_get_error_from_ack(uint8_t *buf) |
| 632 | { |
| 633 | uint8_t *tmp; |
| 634 | uint32_t req_len = get_ack_req_len(buf); |
| 635 | uint32_t msg_type = get_ack_msg_type(buf); |
| 636 | int rc = -ENODEV; |
| 637 | uint32_t err; |
| 638 | uint32_t ack_msg_size = rpm_msg_fmt_ver ? |
| 639 | sizeof(struct msm_rpm_ack_msg_v1) : |
| 640 | sizeof(struct msm_rpm_ack_msg_v0); |
| 641 | |
| 642 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT && |
| 643 | msg_type == RPM_V1_ACK_SERVICE) { |
| 644 | return 0; |
| 645 | } else if (rpm_msg_fmt_ver && msg_type == RPM_V1_NACK_SERVICE) { |
| 646 | err = *(uint32_t *)(buf + sizeof(struct msm_rpm_ack_msg_v1)); |
| 647 | return err; |
| 648 | } |
| 649 | |
| 650 | req_len -= ack_msg_size; |
| 651 | req_len += 2 * sizeof(uint32_t); |
| 652 | if (!req_len) |
| 653 | return 0; |
| 654 | |
| 655 | pr_err("%s:rpm returned error or nack req_len: %d id_ack: %d\n", |
| 656 | __func__, req_len, get_ack_msg_id(buf)); |
| 657 | |
| 658 | tmp = buf + ack_msg_size; |
| 659 | |
| 660 | if (memcmp(tmp, ERR, sizeof(uint32_t))) { |
| 661 | pr_err("%s rpm returned error\n", __func__); |
| 662 | WARN_ON(1); |
| 663 | } |
| 664 | |
| 665 | tmp += 2 * sizeof(uint32_t); |
| 666 | |
| 667 | if (!(memcmp(tmp, INV_RSC, min_t(uint32_t, req_len, |
| 668 | sizeof(INV_RSC))-1))) { |
| 669 | pr_err("%s(): RPM NACK Unsupported resource\n", __func__); |
| 670 | rc = -EINVAL; |
| 671 | } else { |
| 672 | pr_err("%s(): RPM NACK Invalid header\n", __func__); |
| 673 | } |
| 674 | |
| 675 | return rc; |
| 676 | } |
| 677 | |
| 678 | int msm_rpm_smd_buffer_request(struct msm_rpm_request *cdata, |
| 679 | uint32_t size, gfp_t flag) |
| 680 | { |
| 681 | struct slp_buf *slp; |
| 682 | static DEFINE_SPINLOCK(slp_buffer_lock); |
| 683 | unsigned long flags; |
| 684 | char *buf; |
| 685 | |
| 686 | buf = cdata->buf; |
| 687 | |
| 688 | if (size > MAX_SLEEP_BUFFER) |
| 689 | return -ENOMEM; |
| 690 | |
| 691 | spin_lock_irqsave(&slp_buffer_lock, flags); |
| 692 | slp = tr_search(&tr_root, buf); |
| 693 | |
| 694 | if (!slp) { |
| 695 | slp = kzalloc(sizeof(struct slp_buf), GFP_ATOMIC); |
| 696 | if (!slp) { |
| 697 | spin_unlock_irqrestore(&slp_buffer_lock, flags); |
| 698 | return -ENOMEM; |
| 699 | } |
| 700 | slp->buf = PTR_ALIGN(&slp->ubuf[0], sizeof(u32)); |
| 701 | memcpy(slp->buf, buf, size); |
| 702 | if (tr_insert(&tr_root, slp)) |
| 703 | pr_err("Error updating sleep request\n"); |
| 704 | } else { |
| 705 | /* handle unsent requests */ |
| 706 | tr_update(slp, buf); |
| 707 | } |
| 708 | trace_rpm_smd_sleep_set(get_msg_id(cdata->client_buf), |
| 709 | get_rsc_type(cdata->client_buf), |
| 710 | get_req_len(cdata->client_buf)); |
| 711 | |
| 712 | spin_unlock_irqrestore(&slp_buffer_lock, flags); |
| 713 | |
| 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | static struct msm_rpm_driver_data msm_rpm_data = { |
| 718 | .smd_open = COMPLETION_INITIALIZER(msm_rpm_data.smd_open), |
| 719 | }; |
| 720 | |
| 721 | static int msm_rpm_glink_rx_poll(void *glink_handle) |
| 722 | { |
| 723 | int ret; |
| 724 | |
| 725 | ret = glink_rpm_rx_poll(glink_handle); |
| 726 | if (ret >= 0) |
| 727 | /* |
| 728 | * Sleep for 50us at a time before checking |
| 729 | * for packet availability. The 50us is based |
| 730 | * on the the time rpm could take to process |
| 731 | * and send an ack for the sleep set request. |
| 732 | */ |
| 733 | udelay(50); |
| 734 | else |
| 735 | pr_err("Not receieve an ACK from RPM. ret = %d\n", ret); |
| 736 | |
| 737 | return ret; |
| 738 | } |
| 739 | |
| 740 | /* |
| 741 | * Returns |
| 742 | * = 0 on successful reads |
| 743 | * > 0 on successful reads with no further data |
| 744 | * standard Linux error codes on failure. |
| 745 | */ |
| 746 | static int msm_rpm_read_sleep_ack(void) |
| 747 | { |
| 748 | int ret; |
| 749 | char buf[MAX_ERR_BUFFER_SIZE] = {0}; |
| 750 | |
| 751 | if (glink_enabled) |
| 752 | ret = msm_rpm_glink_rx_poll(glink_data->glink_handle); |
| 753 | else { |
| 754 | ret = msm_rpm_read_smd_data(buf); |
| 755 | if (!ret) |
| 756 | ret = smd_is_pkt_avail(msm_rpm_data.ch_info); |
| 757 | } |
| 758 | return ret; |
| 759 | } |
| 760 | |
| 761 | static int msm_rpm_flush_requests(bool print) |
| 762 | { |
| 763 | struct rb_node *t; |
| 764 | int ret; |
| 765 | int count = 0; |
| 766 | |
| 767 | for (t = rb_first(&tr_root); t; t = rb_next(t)) { |
| 768 | |
| 769 | struct slp_buf *s = rb_entry(t, struct slp_buf, node); |
| 770 | unsigned int type = get_rsc_type(s->buf); |
| 771 | unsigned int id = get_rsc_id(s->buf); |
| 772 | |
| 773 | if (!s->valid) |
| 774 | continue; |
| 775 | |
| 776 | set_msg_id(s->buf, msm_rpm_get_next_msg_id()); |
| 777 | |
| 778 | if (!glink_enabled) |
| 779 | ret = msm_rpm_send_smd_buffer(s->buf, |
| 780 | get_buf_len(s->buf), true); |
| 781 | else |
| 782 | ret = msm_rpm_glink_send_buffer(s->buf, |
| 783 | get_buf_len(s->buf), true); |
| 784 | |
| 785 | WARN_ON(ret != get_buf_len(s->buf)); |
| 786 | trace_rpm_smd_send_sleep_set(get_msg_id(s->buf), type, id); |
| 787 | |
| 788 | s->valid = false; |
| 789 | count++; |
| 790 | |
| 791 | /* |
| 792 | * RPM acks need to be handled here if we have sent 24 |
| 793 | * messages such that we do not overrun SMD buffer. Since |
| 794 | * we expect only sleep sets at this point (RPM PC would be |
| 795 | * disallowed if we had pending active requests), we need not |
| 796 | * process these sleep set acks. |
| 797 | */ |
| 798 | if (count >= MAX_WAIT_ON_ACK) { |
| 799 | int ret = msm_rpm_read_sleep_ack(); |
| 800 | |
| 801 | if (ret >= 0) |
| 802 | count--; |
| 803 | else |
| 804 | return ret; |
| 805 | } |
| 806 | } |
| 807 | return 0; |
| 808 | } |
| 809 | |
| 810 | static void msm_rpm_notify_sleep_chain(char *buf, |
| 811 | struct msm_rpm_kvp_data *kvp) |
| 812 | { |
| 813 | struct msm_rpm_notifier_data notif; |
| 814 | |
| 815 | notif.rsc_type = get_rsc_type(buf); |
| 816 | notif.rsc_id = get_req_len(buf); |
| 817 | notif.key = kvp->key; |
| 818 | notif.size = kvp->nbytes; |
| 819 | notif.value = kvp->value; |
| 820 | atomic_notifier_call_chain(&msm_rpm_sleep_notifier, 0, ¬if); |
| 821 | } |
| 822 | |
| 823 | static int msm_rpm_add_kvp_data_common(struct msm_rpm_request *handle, |
| 824 | uint32_t key, const uint8_t *data, int size, bool noirq) |
| 825 | { |
| 826 | uint32_t i; |
| 827 | uint32_t data_size, msg_size; |
| 828 | |
| 829 | if (probe_status) |
| 830 | return probe_status; |
| 831 | |
| 832 | if (!handle || !data) { |
| 833 | pr_err("%s(): Invalid handle/data\n", __func__); |
| 834 | return -EINVAL; |
| 835 | } |
| 836 | |
| 837 | if (size < 0) |
| 838 | return -EINVAL; |
| 839 | |
| 840 | data_size = ALIGN(size, SZ_4); |
| 841 | msg_size = data_size + 8; |
| 842 | |
| 843 | for (i = 0; i < handle->write_idx; i++) { |
| 844 | if (handle->kvp[i].key != key) |
| 845 | continue; |
| 846 | if (handle->kvp[i].nbytes != data_size) { |
| 847 | kfree(handle->kvp[i].value); |
| 848 | handle->kvp[i].value = NULL; |
| 849 | } else { |
| 850 | if (!memcmp(handle->kvp[i].value, data, data_size)) |
| 851 | return 0; |
| 852 | } |
| 853 | break; |
| 854 | } |
| 855 | |
| 856 | if (i >= handle->num_elements) { |
| 857 | pr_err("Number of resources exceeds max allocated\n"); |
| 858 | return -ENOMEM; |
| 859 | } |
| 860 | |
| 861 | if (i == handle->write_idx) |
| 862 | handle->write_idx++; |
| 863 | |
| 864 | if (!handle->kvp[i].value) { |
| 865 | handle->kvp[i].value = kzalloc(data_size, GFP_FLAG(noirq)); |
| 866 | |
| 867 | if (!handle->kvp[i].value) |
| 868 | return -ENOMEM; |
| 869 | } else { |
| 870 | /* We enter the else case, if a key already exists but the |
| 871 | * data doesn't match. In which case, we should zero the data |
| 872 | * out. |
| 873 | */ |
| 874 | memset(handle->kvp[i].value, 0, data_size); |
| 875 | } |
| 876 | |
| 877 | if (!handle->kvp[i].valid) |
| 878 | change_data_len(handle->client_buf, msg_size); |
| 879 | else |
| 880 | change_data_len(handle->client_buf, |
| 881 | (data_size - handle->kvp[i].nbytes)); |
| 882 | |
| 883 | handle->kvp[i].nbytes = data_size; |
| 884 | handle->kvp[i].key = key; |
| 885 | memcpy(handle->kvp[i].value, data, size); |
| 886 | handle->kvp[i].valid = true; |
| 887 | |
| 888 | return 0; |
| 889 | |
| 890 | } |
| 891 | |
| 892 | static struct msm_rpm_request *msm_rpm_create_request_common( |
| 893 | enum msm_rpm_set set, uint32_t rsc_type, uint32_t rsc_id, |
| 894 | int num_elements, bool noirq) |
| 895 | { |
| 896 | struct msm_rpm_request *cdata; |
| 897 | uint32_t buf_size; |
| 898 | |
| 899 | if (probe_status) |
| 900 | return ERR_PTR(probe_status); |
| 901 | |
| 902 | cdata = kzalloc(sizeof(struct msm_rpm_request), |
| 903 | GFP_FLAG(noirq)); |
| 904 | |
| 905 | if (!cdata) { |
| 906 | pr_err("Cannot allocate memory for client data\n"); |
| 907 | goto cdata_alloc_fail; |
| 908 | } |
| 909 | |
| 910 | if (rpm_msg_fmt_ver == RPM_MSG_V0_FMT) |
| 911 | buf_size = sizeof(struct rpm_message_header_v0); |
| 912 | else |
| 913 | buf_size = sizeof(struct rpm_message_header_v1); |
| 914 | |
| 915 | cdata->client_buf = kzalloc(buf_size, GFP_FLAG(noirq)); |
| 916 | |
| 917 | if (!cdata->client_buf) |
| 918 | goto client_buf_alloc_fail; |
| 919 | |
| 920 | set_set_type(cdata->client_buf, set); |
| 921 | set_rsc_type(cdata->client_buf, rsc_type); |
| 922 | set_rsc_id(cdata->client_buf, rsc_id); |
| 923 | |
| 924 | cdata->num_elements = num_elements; |
| 925 | cdata->write_idx = 0; |
| 926 | |
| 927 | cdata->kvp = kcalloc(num_elements, sizeof(struct msm_rpm_kvp_data), |
| 928 | GFP_FLAG(noirq)); |
| 929 | |
| 930 | if (!cdata->kvp) { |
| 931 | pr_warn("%s(): Cannot allocate memory for key value data\n", |
| 932 | __func__); |
| 933 | goto kvp_alloc_fail; |
| 934 | } |
| 935 | |
| 936 | cdata->buf = kzalloc(DEFAULT_BUFFER_SIZE, GFP_FLAG(noirq)); |
| 937 | |
| 938 | if (!cdata->buf) |
| 939 | goto buf_alloc_fail; |
| 940 | |
| 941 | cdata->numbytes = DEFAULT_BUFFER_SIZE; |
| 942 | return cdata; |
| 943 | |
| 944 | buf_alloc_fail: |
| 945 | kfree(cdata->kvp); |
| 946 | kvp_alloc_fail: |
| 947 | kfree(cdata->client_buf); |
| 948 | client_buf_alloc_fail: |
| 949 | kfree(cdata); |
| 950 | cdata_alloc_fail: |
| 951 | return NULL; |
| 952 | |
| 953 | } |
| 954 | |
| 955 | void msm_rpm_free_request(struct msm_rpm_request *handle) |
| 956 | { |
| 957 | int i; |
| 958 | |
| 959 | if (!handle) |
| 960 | return; |
| 961 | for (i = 0; i < handle->num_elements; i++) |
| 962 | kfree(handle->kvp[i].value); |
| 963 | kfree(handle->kvp); |
| 964 | kfree(handle->client_buf); |
| 965 | kfree(handle->buf); |
| 966 | kfree(handle); |
| 967 | } |
| 968 | EXPORT_SYMBOL(msm_rpm_free_request); |
| 969 | |
| 970 | struct msm_rpm_request *msm_rpm_create_request( |
| 971 | enum msm_rpm_set set, uint32_t rsc_type, |
| 972 | uint32_t rsc_id, int num_elements) |
| 973 | { |
| 974 | return msm_rpm_create_request_common(set, rsc_type, rsc_id, |
| 975 | num_elements, false); |
| 976 | } |
| 977 | EXPORT_SYMBOL(msm_rpm_create_request); |
| 978 | |
| 979 | struct msm_rpm_request *msm_rpm_create_request_noirq( |
| 980 | enum msm_rpm_set set, uint32_t rsc_type, |
| 981 | uint32_t rsc_id, int num_elements) |
| 982 | { |
| 983 | return msm_rpm_create_request_common(set, rsc_type, rsc_id, |
| 984 | num_elements, true); |
| 985 | } |
| 986 | EXPORT_SYMBOL(msm_rpm_create_request_noirq); |
| 987 | |
| 988 | int msm_rpm_add_kvp_data(struct msm_rpm_request *handle, |
| 989 | uint32_t key, const uint8_t *data, int size) |
| 990 | { |
| 991 | return msm_rpm_add_kvp_data_common(handle, key, data, size, false); |
| 992 | |
| 993 | } |
| 994 | EXPORT_SYMBOL(msm_rpm_add_kvp_data); |
| 995 | |
| 996 | int msm_rpm_add_kvp_data_noirq(struct msm_rpm_request *handle, |
| 997 | uint32_t key, const uint8_t *data, int size) |
| 998 | { |
| 999 | return msm_rpm_add_kvp_data_common(handle, key, data, size, true); |
| 1000 | } |
| 1001 | EXPORT_SYMBOL(msm_rpm_add_kvp_data_noirq); |
| 1002 | |
| 1003 | /* Runs in interrupt context */ |
| 1004 | static void msm_rpm_notify(void *data, unsigned int event) |
| 1005 | { |
| 1006 | struct msm_rpm_driver_data *pdata = (struct msm_rpm_driver_data *)data; |
| 1007 | |
| 1008 | WARN_ON(!pdata); |
| 1009 | |
| 1010 | if (!(pdata->ch_info)) |
| 1011 | return; |
| 1012 | |
| 1013 | switch (event) { |
| 1014 | case SMD_EVENT_DATA: |
| 1015 | tasklet_schedule(&data_tasklet); |
| 1016 | trace_rpm_smd_interrupt_notify("interrupt notification"); |
| 1017 | break; |
| 1018 | case SMD_EVENT_OPEN: |
| 1019 | complete(&pdata->smd_open); |
| 1020 | break; |
| 1021 | case SMD_EVENT_CLOSE: |
| 1022 | case SMD_EVENT_STATUS: |
| 1023 | case SMD_EVENT_REOPEN_READY: |
| 1024 | break; |
| 1025 | default: |
| 1026 | pr_info("Unknown SMD event\n"); |
| 1027 | |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | bool msm_rpm_waiting_for_ack(void) |
| 1032 | { |
| 1033 | bool ret; |
| 1034 | unsigned long flags; |
| 1035 | |
| 1036 | spin_lock_irqsave(&msm_rpm_list_lock, flags); |
| 1037 | ret = list_empty(&msm_rpm_wait_list); |
| 1038 | spin_unlock_irqrestore(&msm_rpm_list_lock, flags); |
| 1039 | |
| 1040 | return !ret; |
| 1041 | } |
| 1042 | |
| 1043 | static struct msm_rpm_wait_data *msm_rpm_get_entry_from_msg_id(uint32_t msg_id) |
| 1044 | { |
| 1045 | struct list_head *ptr; |
| 1046 | struct msm_rpm_wait_data *elem = NULL; |
| 1047 | unsigned long flags; |
| 1048 | |
| 1049 | spin_lock_irqsave(&msm_rpm_list_lock, flags); |
| 1050 | |
| 1051 | list_for_each(ptr, &msm_rpm_wait_list) { |
| 1052 | elem = list_entry(ptr, struct msm_rpm_wait_data, list); |
| 1053 | if (elem && (elem->msg_id == msg_id)) |
| 1054 | break; |
| 1055 | elem = NULL; |
| 1056 | } |
| 1057 | spin_unlock_irqrestore(&msm_rpm_list_lock, flags); |
| 1058 | return elem; |
| 1059 | } |
| 1060 | |
| 1061 | static uint32_t msm_rpm_get_next_msg_id(void) |
| 1062 | { |
| 1063 | uint32_t id; |
| 1064 | |
| 1065 | /* |
| 1066 | * A message id of 0 is used by the driver to indicate a error |
| 1067 | * condition. The RPM driver uses a id of 1 to indicate unsent data |
| 1068 | * when the data sent over hasn't been modified. This isn't a error |
| 1069 | * scenario and wait for ack returns a success when the message id is 1. |
| 1070 | */ |
| 1071 | |
| 1072 | do { |
| 1073 | id = atomic_inc_return(&msm_rpm_msg_id); |
| 1074 | } while ((id == 0) || (id == 1) || msm_rpm_get_entry_from_msg_id(id)); |
| 1075 | |
| 1076 | return id; |
| 1077 | } |
| 1078 | |
| 1079 | static int msm_rpm_add_wait_list(uint32_t msg_id, bool delete_on_ack) |
| 1080 | { |
| 1081 | unsigned long flags; |
| 1082 | struct msm_rpm_wait_data *data = |
| 1083 | kzalloc(sizeof(struct msm_rpm_wait_data), GFP_ATOMIC); |
| 1084 | |
| 1085 | if (!data) |
| 1086 | return -ENOMEM; |
| 1087 | |
| 1088 | init_completion(&data->ack); |
| 1089 | data->ack_recd = false; |
| 1090 | data->msg_id = msg_id; |
| 1091 | data->errno = INIT_ERROR; |
| 1092 | data->delete_on_ack = delete_on_ack; |
| 1093 | spin_lock_irqsave(&msm_rpm_list_lock, flags); |
| 1094 | if (delete_on_ack) |
| 1095 | list_add_tail(&data->list, &msm_rpm_wait_list); |
| 1096 | else |
| 1097 | list_add(&data->list, &msm_rpm_wait_list); |
| 1098 | spin_unlock_irqrestore(&msm_rpm_list_lock, flags); |
| 1099 | |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | static void msm_rpm_free_list_entry(struct msm_rpm_wait_data *elem) |
| 1104 | { |
| 1105 | unsigned long flags; |
| 1106 | |
| 1107 | spin_lock_irqsave(&msm_rpm_list_lock, flags); |
| 1108 | list_del(&elem->list); |
| 1109 | spin_unlock_irqrestore(&msm_rpm_list_lock, flags); |
| 1110 | kfree(elem); |
| 1111 | } |
| 1112 | |
| 1113 | static void msm_rpm_process_ack(uint32_t msg_id, int errno) |
| 1114 | { |
| 1115 | struct list_head *ptr, *next; |
| 1116 | struct msm_rpm_wait_data *elem = NULL; |
| 1117 | unsigned long flags; |
| 1118 | |
| 1119 | spin_lock_irqsave(&msm_rpm_list_lock, flags); |
| 1120 | |
| 1121 | list_for_each_safe(ptr, next, &msm_rpm_wait_list) { |
| 1122 | elem = list_entry(ptr, struct msm_rpm_wait_data, list); |
| 1123 | if (elem->msg_id == msg_id) { |
| 1124 | elem->errno = errno; |
| 1125 | elem->ack_recd = true; |
| 1126 | complete(&elem->ack); |
| 1127 | if (elem->delete_on_ack) { |
| 1128 | list_del(&elem->list); |
| 1129 | kfree(elem); |
| 1130 | } |
| 1131 | break; |
| 1132 | } |
| 1133 | } |
| 1134 | /* Special case where the sleep driver doesn't |
| 1135 | * wait for ACKs. This would decrease the latency involved with |
| 1136 | * entering RPM assisted power collapse. |
| 1137 | */ |
| 1138 | if (!elem) |
| 1139 | trace_rpm_smd_ack_recvd(0, msg_id, 0xDEADBEEF); |
| 1140 | |
| 1141 | spin_unlock_irqrestore(&msm_rpm_list_lock, flags); |
| 1142 | } |
| 1143 | |
| 1144 | struct msm_rpm_kvp_packet { |
| 1145 | uint32_t id; |
| 1146 | uint32_t len; |
| 1147 | uint32_t val; |
| 1148 | }; |
| 1149 | |
| 1150 | static int msm_rpm_read_smd_data(char *buf) |
| 1151 | { |
| 1152 | int pkt_sz; |
| 1153 | int bytes_read = 0; |
| 1154 | |
| 1155 | pkt_sz = smd_cur_packet_size(msm_rpm_data.ch_info); |
| 1156 | |
| 1157 | if (!pkt_sz) |
| 1158 | return -EAGAIN; |
| 1159 | |
| 1160 | if (pkt_sz > MAX_ERR_BUFFER_SIZE) { |
| 1161 | pr_err("rpm_smd pkt_sz is greater than max size\n"); |
| 1162 | goto error; |
| 1163 | } |
| 1164 | |
| 1165 | if (pkt_sz != smd_read_avail(msm_rpm_data.ch_info)) |
| 1166 | return -EAGAIN; |
| 1167 | |
| 1168 | do { |
| 1169 | int len; |
| 1170 | |
| 1171 | len = smd_read(msm_rpm_data.ch_info, buf + bytes_read, pkt_sz); |
| 1172 | pkt_sz -= len; |
| 1173 | bytes_read += len; |
| 1174 | |
| 1175 | } while (pkt_sz > 0); |
| 1176 | |
| 1177 | if (pkt_sz < 0) { |
| 1178 | pr_err("rpm_smd pkt_sz is less than zero\n"); |
| 1179 | goto error; |
| 1180 | } |
| 1181 | return 0; |
| 1182 | error: |
| 1183 | WARN_ON(1); |
| 1184 | |
| 1185 | return 0; |
| 1186 | } |
| 1187 | |
| 1188 | static void data_fn_tasklet(unsigned long data) |
| 1189 | { |
| 1190 | uint32_t msg_id; |
| 1191 | int errno; |
| 1192 | char buf[MAX_ERR_BUFFER_SIZE] = {0}; |
| 1193 | |
| 1194 | spin_lock(&msm_rpm_data.smd_lock_read); |
| 1195 | while (smd_is_pkt_avail(msm_rpm_data.ch_info)) { |
| 1196 | if (msm_rpm_read_smd_data(buf)) |
| 1197 | break; |
| 1198 | msg_id = msm_rpm_get_msg_id_from_ack(buf); |
| 1199 | errno = msm_rpm_get_error_from_ack(buf); |
| 1200 | trace_rpm_smd_ack_recvd(0, msg_id, errno); |
| 1201 | msm_rpm_process_ack(msg_id, errno); |
| 1202 | } |
| 1203 | spin_unlock(&msm_rpm_data.smd_lock_read); |
| 1204 | } |
| 1205 | |
| 1206 | static void msm_rpm_log_request(struct msm_rpm_request *cdata) |
| 1207 | { |
| 1208 | char buf[DEBUG_PRINT_BUFFER_SIZE]; |
| 1209 | size_t buflen = DEBUG_PRINT_BUFFER_SIZE; |
| 1210 | char name[5]; |
| 1211 | u32 value; |
| 1212 | uint32_t i; |
| 1213 | int j, prev_valid; |
| 1214 | int valid_count = 0; |
| 1215 | int pos = 0; |
| 1216 | uint32_t res_type, rsc_id; |
| 1217 | |
| 1218 | name[4] = 0; |
| 1219 | |
| 1220 | for (i = 0; i < cdata->write_idx; i++) |
| 1221 | if (cdata->kvp[i].valid) |
| 1222 | valid_count++; |
| 1223 | |
| 1224 | pos += scnprintf(buf + pos, buflen - pos, "%sRPM req: ", KERN_INFO); |
| 1225 | if (msm_rpm_debug_mask & MSM_RPM_LOG_REQUEST_SHOW_MSG_ID) |
| 1226 | pos += scnprintf(buf + pos, buflen - pos, "msg_id=%u, ", |
| 1227 | get_msg_id(cdata->client_buf)); |
| 1228 | pos += scnprintf(buf + pos, buflen - pos, "s=%s", |
| 1229 | (get_set_type(cdata->client_buf) == |
| 1230 | MSM_RPM_CTX_ACTIVE_SET ? "act" : "slp")); |
| 1231 | |
| 1232 | res_type = get_rsc_type(cdata->client_buf); |
| 1233 | rsc_id = get_rsc_id(cdata->client_buf); |
| 1234 | if ((msm_rpm_debug_mask & MSM_RPM_LOG_REQUEST_PRETTY) |
| 1235 | && (msm_rpm_debug_mask & MSM_RPM_LOG_REQUEST_RAW)) { |
| 1236 | /* Both pretty and raw formatting */ |
| 1237 | memcpy(name, &res_type, sizeof(uint32_t)); |
| 1238 | pos += scnprintf(buf + pos, buflen - pos, |
| 1239 | ", rsc_type=0x%08X (%s), rsc_id=%u; ", |
| 1240 | res_type, name, rsc_id); |
| 1241 | |
| 1242 | for (i = 0, prev_valid = 0; i < cdata->write_idx; i++) { |
| 1243 | if (!cdata->kvp[i].valid) |
| 1244 | continue; |
| 1245 | |
| 1246 | memcpy(name, &cdata->kvp[i].key, sizeof(uint32_t)); |
| 1247 | pos += scnprintf(buf + pos, buflen - pos, |
| 1248 | "[key=0x%08X (%s), value=%s", |
| 1249 | cdata->kvp[i].key, name, |
| 1250 | (cdata->kvp[i].nbytes ? "0x" : "null")); |
| 1251 | |
| 1252 | for (j = 0; j < cdata->kvp[i].nbytes; j++) |
| 1253 | pos += scnprintf(buf + pos, buflen - pos, |
| 1254 | "%02X ", |
| 1255 | cdata->kvp[i].value[j]); |
| 1256 | |
| 1257 | if (cdata->kvp[i].nbytes) |
| 1258 | pos += scnprintf(buf + pos, buflen - pos, "("); |
| 1259 | |
| 1260 | for (j = 0; j < cdata->kvp[i].nbytes; j += 4) { |
| 1261 | value = 0; |
| 1262 | memcpy(&value, &cdata->kvp[i].value[j], |
| 1263 | min_t(uint32_t, sizeof(uint32_t), |
| 1264 | cdata->kvp[i].nbytes - j)); |
| 1265 | pos += scnprintf(buf + pos, buflen - pos, "%u", |
| 1266 | value); |
| 1267 | if (j + 4 < cdata->kvp[i].nbytes) |
| 1268 | pos += scnprintf(buf + pos, |
| 1269 | buflen - pos, " "); |
| 1270 | } |
| 1271 | if (cdata->kvp[i].nbytes) |
| 1272 | pos += scnprintf(buf + pos, buflen - pos, ")"); |
| 1273 | pos += scnprintf(buf + pos, buflen - pos, "]"); |
| 1274 | if (prev_valid + 1 < valid_count) |
| 1275 | pos += scnprintf(buf + pos, buflen - pos, ", "); |
| 1276 | prev_valid++; |
| 1277 | } |
| 1278 | } else if (msm_rpm_debug_mask & MSM_RPM_LOG_REQUEST_PRETTY) { |
| 1279 | /* Pretty formatting only */ |
| 1280 | memcpy(name, &res_type, sizeof(uint32_t)); |
| 1281 | pos += scnprintf(buf + pos, buflen - pos, " %s %u; ", name, |
| 1282 | rsc_id); |
| 1283 | |
| 1284 | for (i = 0, prev_valid = 0; i < cdata->write_idx; i++) { |
| 1285 | if (!cdata->kvp[i].valid) |
| 1286 | continue; |
| 1287 | |
| 1288 | memcpy(name, &cdata->kvp[i].key, sizeof(uint32_t)); |
| 1289 | pos += scnprintf(buf + pos, buflen - pos, "%s=%s", |
| 1290 | name, (cdata->kvp[i].nbytes ? "" : "null")); |
| 1291 | |
| 1292 | for (j = 0; j < cdata->kvp[i].nbytes; j += 4) { |
| 1293 | value = 0; |
| 1294 | memcpy(&value, &cdata->kvp[i].value[j], |
| 1295 | min_t(uint32_t, sizeof(uint32_t), |
| 1296 | cdata->kvp[i].nbytes - j)); |
| 1297 | pos += scnprintf(buf + pos, buflen - pos, "%u", |
| 1298 | value); |
| 1299 | |
| 1300 | if (j + 4 < cdata->kvp[i].nbytes) |
| 1301 | pos += scnprintf(buf + pos, |
| 1302 | buflen - pos, " "); |
| 1303 | } |
| 1304 | if (prev_valid + 1 < valid_count) |
| 1305 | pos += scnprintf(buf + pos, buflen - pos, ", "); |
| 1306 | prev_valid++; |
| 1307 | } |
| 1308 | } else { |
| 1309 | /* Raw formatting only */ |
| 1310 | pos += scnprintf(buf + pos, buflen - pos, |
| 1311 | ", rsc_type=0x%08X, rsc_id=%u; ", res_type, rsc_id); |
| 1312 | |
| 1313 | for (i = 0, prev_valid = 0; i < cdata->write_idx; i++) { |
| 1314 | if (!cdata->kvp[i].valid) |
| 1315 | continue; |
| 1316 | |
| 1317 | pos += scnprintf(buf + pos, buflen - pos, |
| 1318 | "[key=0x%08X, value=%s", |
| 1319 | cdata->kvp[i].key, |
| 1320 | (cdata->kvp[i].nbytes ? "0x" : "null")); |
| 1321 | for (j = 0; j < cdata->kvp[i].nbytes; j++) { |
| 1322 | pos += scnprintf(buf + pos, buflen - pos, |
| 1323 | "%02X", |
| 1324 | cdata->kvp[i].value[j]); |
| 1325 | if (j + 1 < cdata->kvp[i].nbytes) |
| 1326 | pos += scnprintf(buf + pos, |
| 1327 | buflen - pos, " "); |
| 1328 | } |
| 1329 | pos += scnprintf(buf + pos, buflen - pos, "]"); |
| 1330 | if (prev_valid + 1 < valid_count) |
| 1331 | pos += scnprintf(buf + pos, buflen - pos, ", "); |
| 1332 | prev_valid++; |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | pos += scnprintf(buf + pos, buflen - pos, "\n"); |
| 1337 | printk(buf); |
| 1338 | } |
| 1339 | |
| 1340 | static int msm_rpm_send_smd_buffer(char *buf, uint32_t size, bool noirq) |
| 1341 | { |
| 1342 | unsigned long flags; |
| 1343 | int ret; |
| 1344 | |
| 1345 | spin_lock_irqsave(&msm_rpm_data.smd_lock_write, flags); |
| 1346 | ret = smd_write_avail(msm_rpm_data.ch_info); |
| 1347 | |
| 1348 | while ((ret = smd_write_avail(msm_rpm_data.ch_info)) < size) { |
| 1349 | if (ret < 0) |
| 1350 | break; |
| 1351 | if (!noirq) { |
| 1352 | spin_unlock_irqrestore( |
| 1353 | &msm_rpm_data.smd_lock_write, flags); |
| 1354 | cpu_relax(); |
| 1355 | spin_lock_irqsave( |
| 1356 | &msm_rpm_data.smd_lock_write, flags); |
| 1357 | } else |
| 1358 | udelay(5); |
| 1359 | } |
| 1360 | |
| 1361 | if (ret < 0) { |
| 1362 | pr_err("SMD not initialized\n"); |
| 1363 | spin_unlock_irqrestore( |
| 1364 | &msm_rpm_data.smd_lock_write, flags); |
| 1365 | return ret; |
| 1366 | } |
| 1367 | |
| 1368 | ret = smd_write(msm_rpm_data.ch_info, buf, size); |
| 1369 | spin_unlock_irqrestore(&msm_rpm_data.smd_lock_write, flags); |
| 1370 | return ret; |
| 1371 | } |
| 1372 | |
| 1373 | static int msm_rpm_glink_send_buffer(char *buf, uint32_t size, bool noirq) |
| 1374 | { |
| 1375 | int ret; |
| 1376 | unsigned long flags; |
| 1377 | int timeout = 50; |
| 1378 | |
| 1379 | spin_lock_irqsave(&msm_rpm_data.smd_lock_write, flags); |
| 1380 | do { |
| 1381 | ret = glink_tx(glink_data->glink_handle, buf, buf, |
| 1382 | size, GLINK_TX_SINGLE_THREADED); |
| 1383 | if (ret == -EBUSY || ret == -ENOSPC) { |
| 1384 | if (!noirq) { |
| 1385 | spin_unlock_irqrestore( |
| 1386 | &msm_rpm_data.smd_lock_write, flags); |
| 1387 | cpu_relax(); |
| 1388 | spin_lock_irqsave( |
| 1389 | &msm_rpm_data.smd_lock_write, flags); |
| 1390 | } else { |
| 1391 | udelay(5); |
| 1392 | } |
| 1393 | timeout--; |
| 1394 | } else { |
| 1395 | ret = 0; |
| 1396 | } |
| 1397 | } while (ret && timeout); |
| 1398 | spin_unlock_irqrestore(&msm_rpm_data.smd_lock_write, flags); |
| 1399 | |
| 1400 | if (!timeout) |
| 1401 | return 0; |
| 1402 | else |
| 1403 | return size; |
| 1404 | } |
| 1405 | |
| 1406 | static int msm_rpm_send_data(struct msm_rpm_request *cdata, |
| 1407 | int msg_type, bool noirq, bool noack) |
| 1408 | { |
| 1409 | uint8_t *tmpbuff; |
| 1410 | int ret; |
| 1411 | uint32_t i; |
| 1412 | uint32_t msg_size; |
| 1413 | int msg_hdr_sz, req_hdr_sz; |
| 1414 | uint32_t data_len = get_data_len(cdata->client_buf); |
| 1415 | uint32_t set = get_set_type(cdata->client_buf); |
| 1416 | uint32_t msg_id; |
| 1417 | |
| 1418 | if (probe_status) |
| 1419 | return probe_status; |
| 1420 | |
| 1421 | if (!data_len) |
| 1422 | return 1; |
| 1423 | |
| 1424 | msg_hdr_sz = rpm_msg_fmt_ver ? sizeof(struct rpm_message_header_v1) : |
| 1425 | sizeof(struct rpm_message_header_v0); |
| 1426 | |
| 1427 | req_hdr_sz = RPM_HDR_SIZE; |
| 1428 | set_msg_type(cdata->client_buf, msg_type); |
| 1429 | |
| 1430 | set_req_len(cdata->client_buf, data_len + msg_hdr_sz - req_hdr_sz); |
| 1431 | msg_size = get_req_len(cdata->client_buf) + req_hdr_sz; |
| 1432 | |
| 1433 | /* populate data_len */ |
| 1434 | if (msg_size > cdata->numbytes) { |
| 1435 | kfree(cdata->buf); |
| 1436 | cdata->numbytes = msg_size; |
| 1437 | cdata->buf = kzalloc(msg_size, GFP_FLAG(noirq)); |
| 1438 | } |
| 1439 | |
| 1440 | if (!cdata->buf) { |
| 1441 | pr_err("Failed malloc\n"); |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | tmpbuff = cdata->buf; |
| 1446 | |
| 1447 | tmpbuff += msg_hdr_sz; |
| 1448 | for (i = 0; (i < cdata->write_idx); i++) { |
| 1449 | /* Sanity check */ |
| 1450 | WARN_ON((tmpbuff - cdata->buf) > cdata->numbytes); |
| 1451 | |
| 1452 | if (!cdata->kvp[i].valid) |
| 1453 | continue; |
| 1454 | |
| 1455 | memcpy(tmpbuff, &cdata->kvp[i].key, sizeof(uint32_t)); |
| 1456 | tmpbuff += sizeof(uint32_t); |
| 1457 | |
| 1458 | memcpy(tmpbuff, &cdata->kvp[i].nbytes, sizeof(uint32_t)); |
| 1459 | tmpbuff += sizeof(uint32_t); |
| 1460 | |
| 1461 | memcpy(tmpbuff, cdata->kvp[i].value, cdata->kvp[i].nbytes); |
| 1462 | tmpbuff += cdata->kvp[i].nbytes; |
| 1463 | |
| 1464 | if (set == MSM_RPM_CTX_SLEEP_SET) |
| 1465 | msm_rpm_notify_sleep_chain(cdata->client_buf, |
| 1466 | &cdata->kvp[i]); |
| 1467 | |
| 1468 | } |
| 1469 | |
| 1470 | memcpy(cdata->buf, cdata->client_buf, msg_hdr_sz); |
| 1471 | if ((set == MSM_RPM_CTX_SLEEP_SET) && |
| 1472 | !msm_rpm_smd_buffer_request(cdata, msg_size, |
| 1473 | GFP_FLAG(noirq))) |
| 1474 | return 1; |
| 1475 | |
| 1476 | msg_id = msm_rpm_get_next_msg_id(); |
| 1477 | /* Set the version bit for new protocol */ |
| 1478 | set_msg_ver(cdata->buf, rpm_msg_fmt_ver); |
| 1479 | set_msg_id(cdata->buf, msg_id); |
| 1480 | set_msg_id(cdata->client_buf, msg_id); |
| 1481 | |
| 1482 | if (msm_rpm_debug_mask |
| 1483 | & (MSM_RPM_LOG_REQUEST_PRETTY | MSM_RPM_LOG_REQUEST_RAW)) |
| 1484 | msm_rpm_log_request(cdata); |
| 1485 | |
| 1486 | if (standalone) { |
| 1487 | for (i = 0; (i < cdata->write_idx); i++) |
| 1488 | cdata->kvp[i].valid = false; |
| 1489 | |
| 1490 | set_data_len(cdata->client_buf, 0); |
| 1491 | ret = msg_id; |
| 1492 | return ret; |
| 1493 | } |
| 1494 | |
| 1495 | msm_rpm_add_wait_list(msg_id, noack); |
| 1496 | |
| 1497 | ret = msm_rpm_send_buffer(&cdata->buf[0], msg_size, noirq); |
| 1498 | |
| 1499 | if (ret == msg_size) { |
| 1500 | for (i = 0; (i < cdata->write_idx); i++) |
| 1501 | cdata->kvp[i].valid = false; |
| 1502 | set_data_len(cdata->client_buf, 0); |
| 1503 | ret = msg_id; |
| 1504 | trace_rpm_smd_send_active_set(msg_id, |
| 1505 | get_rsc_type(cdata->client_buf), |
| 1506 | get_rsc_id(cdata->client_buf)); |
| 1507 | } else if (ret < msg_size) { |
| 1508 | struct msm_rpm_wait_data *rc; |
| 1509 | |
| 1510 | ret = 0; |
| 1511 | pr_err("Failed to write data msg_size:%d ret:%d msg_id:%d\n", |
| 1512 | msg_size, ret, msg_id); |
| 1513 | rc = msm_rpm_get_entry_from_msg_id(msg_id); |
| 1514 | if (rc) |
| 1515 | msm_rpm_free_list_entry(rc); |
| 1516 | } |
| 1517 | return ret; |
| 1518 | } |
| 1519 | |
| 1520 | static int _msm_rpm_send_request(struct msm_rpm_request *handle, bool noack) |
| 1521 | { |
| 1522 | int ret; |
| 1523 | static DEFINE_MUTEX(send_mtx); |
| 1524 | |
| 1525 | mutex_lock(&send_mtx); |
| 1526 | ret = msm_rpm_send_data(handle, MSM_RPM_MSG_REQUEST_TYPE, false, noack); |
| 1527 | mutex_unlock(&send_mtx); |
| 1528 | |
| 1529 | return ret; |
| 1530 | } |
| 1531 | |
| 1532 | int msm_rpm_send_request(struct msm_rpm_request *handle) |
| 1533 | { |
| 1534 | return _msm_rpm_send_request(handle, false); |
| 1535 | } |
| 1536 | EXPORT_SYMBOL(msm_rpm_send_request); |
| 1537 | |
| 1538 | int msm_rpm_send_request_noirq(struct msm_rpm_request *handle) |
| 1539 | { |
| 1540 | return msm_rpm_send_data(handle, MSM_RPM_MSG_REQUEST_TYPE, true, false); |
| 1541 | } |
| 1542 | EXPORT_SYMBOL(msm_rpm_send_request_noirq); |
| 1543 | |
| 1544 | void *msm_rpm_send_request_noack(struct msm_rpm_request *handle) |
| 1545 | { |
| 1546 | int ret; |
| 1547 | |
| 1548 | ret = _msm_rpm_send_request(handle, true); |
| 1549 | |
| 1550 | return ret < 0 ? ERR_PTR(ret) : NULL; |
| 1551 | } |
| 1552 | EXPORT_SYMBOL(msm_rpm_send_request_noack); |
| 1553 | |
| 1554 | int msm_rpm_wait_for_ack(uint32_t msg_id) |
| 1555 | { |
| 1556 | struct msm_rpm_wait_data *elem; |
| 1557 | int rc = 0; |
| 1558 | |
| 1559 | if (!msg_id) { |
| 1560 | pr_err("Invalid msg id\n"); |
| 1561 | return -ENOMEM; |
| 1562 | } |
| 1563 | |
| 1564 | if (msg_id == 1) |
| 1565 | return rc; |
| 1566 | |
| 1567 | if (standalone) |
| 1568 | return rc; |
| 1569 | |
| 1570 | elem = msm_rpm_get_entry_from_msg_id(msg_id); |
| 1571 | if (!elem) |
| 1572 | return rc; |
| 1573 | |
| 1574 | wait_for_completion(&elem->ack); |
| 1575 | trace_rpm_smd_ack_recvd(0, msg_id, 0xDEADFEED); |
| 1576 | |
| 1577 | rc = elem->errno; |
| 1578 | msm_rpm_free_list_entry(elem); |
| 1579 | |
| 1580 | return rc; |
| 1581 | } |
| 1582 | EXPORT_SYMBOL(msm_rpm_wait_for_ack); |
| 1583 | |
| 1584 | static void msm_rpm_smd_read_data_noirq(uint32_t msg_id) |
| 1585 | { |
| 1586 | uint32_t id = 0; |
| 1587 | |
| 1588 | while (id != msg_id) { |
| 1589 | if (smd_is_pkt_avail(msm_rpm_data.ch_info)) { |
| 1590 | int errno; |
| 1591 | char buf[MAX_ERR_BUFFER_SIZE] = {}; |
| 1592 | |
| 1593 | msm_rpm_read_smd_data(buf); |
| 1594 | id = msm_rpm_get_msg_id_from_ack(buf); |
| 1595 | errno = msm_rpm_get_error_from_ack(buf); |
| 1596 | trace_rpm_smd_ack_recvd(1, msg_id, errno); |
| 1597 | msm_rpm_process_ack(id, errno); |
| 1598 | } |
| 1599 | } |
| 1600 | } |
| 1601 | |
| 1602 | static void msm_rpm_glink_read_data_noirq(struct msm_rpm_wait_data *elem) |
| 1603 | { |
| 1604 | int ret; |
| 1605 | |
| 1606 | /* Use rx_poll method to read the message from RPM */ |
| 1607 | while (elem->errno) { |
| 1608 | ret = glink_rpm_rx_poll(glink_data->glink_handle); |
| 1609 | if (ret >= 0) { |
| 1610 | /* |
| 1611 | * We might have receieve the notification. |
| 1612 | * Now we have to check whether the notification |
| 1613 | * received is what we are interested? |
| 1614 | * Wait for few usec to get the notification |
| 1615 | * before re-trying the poll again. |
| 1616 | */ |
| 1617 | udelay(50); |
| 1618 | } else { |
| 1619 | pr_err("rx poll return error = %d\n", ret); |
| 1620 | } |
| 1621 | } |
| 1622 | } |
| 1623 | |
| 1624 | int msm_rpm_wait_for_ack_noirq(uint32_t msg_id) |
| 1625 | { |
| 1626 | struct msm_rpm_wait_data *elem; |
| 1627 | unsigned long flags; |
| 1628 | int rc = 0; |
| 1629 | |
| 1630 | if (!msg_id) { |
| 1631 | pr_err("Invalid msg id\n"); |
| 1632 | return -ENOMEM; |
| 1633 | } |
| 1634 | |
| 1635 | if (msg_id == 1) |
| 1636 | return 0; |
| 1637 | |
| 1638 | if (standalone) |
| 1639 | return 0; |
| 1640 | |
| 1641 | spin_lock_irqsave(&msm_rpm_data.smd_lock_read, flags); |
| 1642 | |
| 1643 | elem = msm_rpm_get_entry_from_msg_id(msg_id); |
| 1644 | |
| 1645 | if (!elem) |
| 1646 | /* Should this be a bug |
| 1647 | * Is it ok for another thread to read the msg? |
| 1648 | */ |
| 1649 | goto wait_ack_cleanup; |
| 1650 | |
| 1651 | if (elem->errno != INIT_ERROR) { |
| 1652 | rc = elem->errno; |
| 1653 | msm_rpm_free_list_entry(elem); |
| 1654 | goto wait_ack_cleanup; |
| 1655 | } |
| 1656 | |
| 1657 | if (!glink_enabled) |
| 1658 | msm_rpm_smd_read_data_noirq(msg_id); |
| 1659 | else |
| 1660 | msm_rpm_glink_read_data_noirq(elem); |
| 1661 | |
| 1662 | rc = elem->errno; |
| 1663 | |
| 1664 | msm_rpm_free_list_entry(elem); |
| 1665 | wait_ack_cleanup: |
| 1666 | spin_unlock_irqrestore(&msm_rpm_data.smd_lock_read, flags); |
| 1667 | |
| 1668 | if (!glink_enabled) |
| 1669 | if (smd_is_pkt_avail(msm_rpm_data.ch_info)) |
| 1670 | tasklet_schedule(&data_tasklet); |
| 1671 | return rc; |
| 1672 | } |
| 1673 | EXPORT_SYMBOL(msm_rpm_wait_for_ack_noirq); |
| 1674 | |
| 1675 | void *msm_rpm_send_message_noack(enum msm_rpm_set set, uint32_t rsc_type, |
| 1676 | uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems) |
| 1677 | { |
| 1678 | int i, rc; |
| 1679 | struct msm_rpm_request *req = |
| 1680 | msm_rpm_create_request_common(set, rsc_type, rsc_id, nelems, |
| 1681 | false); |
| 1682 | |
| 1683 | if (IS_ERR(req)) |
| 1684 | return req; |
| 1685 | |
| 1686 | if (!req) |
| 1687 | return ERR_PTR(ENOMEM); |
| 1688 | |
| 1689 | for (i = 0; i < nelems; i++) { |
| 1690 | rc = msm_rpm_add_kvp_data(req, kvp[i].key, |
| 1691 | kvp[i].data, kvp[i].length); |
| 1692 | if (rc) |
| 1693 | goto bail; |
| 1694 | } |
| 1695 | |
| 1696 | rc = PTR_ERR(msm_rpm_send_request_noack(req)); |
| 1697 | bail: |
| 1698 | msm_rpm_free_request(req); |
| 1699 | return rc < 0 ? ERR_PTR(rc) : NULL; |
| 1700 | } |
| 1701 | EXPORT_SYMBOL(msm_rpm_send_message_noack); |
| 1702 | |
| 1703 | int msm_rpm_send_message(enum msm_rpm_set set, uint32_t rsc_type, |
| 1704 | uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems) |
| 1705 | { |
| 1706 | int i, rc; |
| 1707 | struct msm_rpm_request *req = |
| 1708 | msm_rpm_create_request(set, rsc_type, rsc_id, nelems); |
| 1709 | |
| 1710 | if (IS_ERR(req)) |
| 1711 | return PTR_ERR(req); |
| 1712 | |
| 1713 | if (!req) |
| 1714 | return -ENOMEM; |
| 1715 | |
| 1716 | for (i = 0; i < nelems; i++) { |
| 1717 | rc = msm_rpm_add_kvp_data(req, kvp[i].key, |
| 1718 | kvp[i].data, kvp[i].length); |
| 1719 | if (rc) |
| 1720 | goto bail; |
| 1721 | } |
| 1722 | |
| 1723 | rc = msm_rpm_wait_for_ack(msm_rpm_send_request(req)); |
| 1724 | bail: |
| 1725 | msm_rpm_free_request(req); |
| 1726 | return rc; |
| 1727 | } |
| 1728 | EXPORT_SYMBOL(msm_rpm_send_message); |
| 1729 | |
| 1730 | int msm_rpm_send_message_noirq(enum msm_rpm_set set, uint32_t rsc_type, |
| 1731 | uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems) |
| 1732 | { |
| 1733 | int i, rc; |
| 1734 | struct msm_rpm_request *req = |
| 1735 | msm_rpm_create_request_noirq(set, rsc_type, rsc_id, nelems); |
| 1736 | |
| 1737 | if (IS_ERR(req)) |
| 1738 | return PTR_ERR(req); |
| 1739 | |
| 1740 | if (!req) |
| 1741 | return -ENOMEM; |
| 1742 | |
| 1743 | for (i = 0; i < nelems; i++) { |
| 1744 | rc = msm_rpm_add_kvp_data_noirq(req, kvp[i].key, |
| 1745 | kvp[i].data, kvp[i].length); |
| 1746 | if (rc) |
| 1747 | goto bail; |
| 1748 | } |
| 1749 | |
| 1750 | rc = msm_rpm_wait_for_ack_noirq(msm_rpm_send_request_noirq(req)); |
| 1751 | bail: |
| 1752 | msm_rpm_free_request(req); |
| 1753 | return rc; |
| 1754 | } |
| 1755 | EXPORT_SYMBOL(msm_rpm_send_message_noirq); |
| 1756 | |
| 1757 | /** |
| 1758 | * During power collapse, the rpm driver disables the SMD interrupts to make |
| 1759 | * sure that the interrupt doesn't wakes us from sleep. |
| 1760 | */ |
| 1761 | int msm_rpm_enter_sleep(bool print, const struct cpumask *cpumask) |
| 1762 | { |
| 1763 | int ret = 0; |
| 1764 | |
| 1765 | if (standalone) |
| 1766 | return 0; |
| 1767 | |
| 1768 | if (!glink_enabled) |
| 1769 | ret = smd_mask_receive_interrupt(msm_rpm_data.ch_info, |
| 1770 | true, cpumask); |
| 1771 | else |
| 1772 | ret = glink_rpm_mask_rx_interrupt(glink_data->glink_handle, |
| 1773 | true, (void *)cpumask); |
| 1774 | |
| 1775 | if (!ret) { |
| 1776 | ret = msm_rpm_flush_requests(print); |
| 1777 | |
| 1778 | if (ret) { |
| 1779 | if (!glink_enabled) |
| 1780 | smd_mask_receive_interrupt( |
| 1781 | msm_rpm_data.ch_info, false, NULL); |
| 1782 | else |
| 1783 | glink_rpm_mask_rx_interrupt( |
| 1784 | glink_data->glink_handle, false, NULL); |
| 1785 | } |
| 1786 | } |
| 1787 | return ret; |
| 1788 | } |
| 1789 | EXPORT_SYMBOL(msm_rpm_enter_sleep); |
| 1790 | |
| 1791 | /** |
| 1792 | * When the system resumes from power collapse, the SMD interrupt disabled by |
| 1793 | * enter function has to reenabled to continue processing SMD message. |
| 1794 | */ |
| 1795 | void msm_rpm_exit_sleep(void) |
| 1796 | { |
| 1797 | int ret; |
| 1798 | |
| 1799 | if (standalone) |
| 1800 | return; |
| 1801 | |
| 1802 | do { |
| 1803 | ret = msm_rpm_read_sleep_ack(); |
| 1804 | } while (ret > 0); |
| 1805 | |
| 1806 | if (!glink_enabled) |
| 1807 | smd_mask_receive_interrupt(msm_rpm_data.ch_info, false, NULL); |
| 1808 | else |
| 1809 | glink_rpm_mask_rx_interrupt(glink_data->glink_handle, |
| 1810 | false, NULL); |
| 1811 | } |
| 1812 | EXPORT_SYMBOL(msm_rpm_exit_sleep); |
| 1813 | |
| 1814 | /* |
| 1815 | * Whenever there is a data from RPM, notify_rx will be called. |
| 1816 | * This function is invoked either interrupt OR polling context. |
| 1817 | */ |
| 1818 | static void msm_rpm_trans_notify_rx(void *handle, const void *priv, |
| 1819 | const void *pkt_priv, const void *ptr, size_t size) |
| 1820 | { |
| 1821 | uint32_t msg_id; |
| 1822 | int errno; |
| 1823 | char buf[MAX_ERR_BUFFER_SIZE] = {0}; |
| 1824 | struct msm_rpm_wait_data *elem; |
| 1825 | static DEFINE_SPINLOCK(rx_notify_lock); |
| 1826 | unsigned long flags; |
| 1827 | |
| 1828 | if (!size) |
| 1829 | return; |
| 1830 | |
| 1831 | WARN_ON(size > MAX_ERR_BUFFER_SIZE); |
| 1832 | |
| 1833 | spin_lock_irqsave(&rx_notify_lock, flags); |
| 1834 | memcpy(buf, ptr, size); |
| 1835 | msg_id = msm_rpm_get_msg_id_from_ack(buf); |
| 1836 | errno = msm_rpm_get_error_from_ack(buf); |
| 1837 | elem = msm_rpm_get_entry_from_msg_id(msg_id); |
| 1838 | |
| 1839 | /* |
| 1840 | * It is applicable for sleep set requests |
| 1841 | * Sleep set requests are not added to the |
| 1842 | * wait queue list. Without this check we |
| 1843 | * run into NULL pointer deferrence issue. |
| 1844 | */ |
| 1845 | if (!elem) { |
| 1846 | spin_unlock_irqrestore(&rx_notify_lock, flags); |
| 1847 | glink_rx_done(handle, ptr, 0); |
| 1848 | return; |
| 1849 | } |
| 1850 | |
| 1851 | msm_rpm_process_ack(msg_id, errno); |
| 1852 | spin_unlock_irqrestore(&rx_notify_lock, flags); |
| 1853 | |
| 1854 | glink_rx_done(handle, ptr, 0); |
| 1855 | } |
| 1856 | |
| 1857 | static void msm_rpm_trans_notify_state(void *handle, const void *priv, |
| 1858 | unsigned int event) |
| 1859 | { |
| 1860 | switch (event) { |
| 1861 | case GLINK_CONNECTED: |
| 1862 | glink_data->glink_handle = handle; |
| 1863 | |
| 1864 | if (IS_ERR_OR_NULL(glink_data->glink_handle)) { |
| 1865 | pr_err("glink_handle %d\n", |
| 1866 | (int)PTR_ERR(glink_data->glink_handle)); |
| 1867 | WARN_ON(1); |
| 1868 | } |
| 1869 | |
| 1870 | /* |
| 1871 | * Do not allow clients to send data to RPM until glink |
| 1872 | * is fully open. |
| 1873 | */ |
| 1874 | probe_status = 0; |
| 1875 | pr_info("glink config params: transport=%s, edge=%s, name=%s\n", |
| 1876 | glink_data->xprt, |
| 1877 | glink_data->edge, |
| 1878 | glink_data->name); |
| 1879 | break; |
| 1880 | default: |
| 1881 | pr_err("Unrecognized event %d\n", event); |
| 1882 | break; |
| 1883 | }; |
| 1884 | } |
| 1885 | |
| 1886 | static void msm_rpm_trans_notify_tx_done(void *handle, const void *priv, |
| 1887 | const void *pkt_priv, const void *ptr) |
| 1888 | { |
| 1889 | } |
| 1890 | |
| 1891 | static void msm_rpm_glink_open_work(struct work_struct *work) |
| 1892 | { |
| 1893 | pr_debug("Opening glink channel\n"); |
| 1894 | glink_data->glink_handle = glink_open(glink_data->open_cfg); |
| 1895 | |
| 1896 | if (IS_ERR_OR_NULL(glink_data->glink_handle)) { |
| 1897 | pr_err("Error: glink_open failed %d\n", |
| 1898 | (int)PTR_ERR(glink_data->glink_handle)); |
| 1899 | WARN_ON(1); |
| 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | static void msm_rpm_glink_notifier_cb(struct glink_link_state_cb_info *cb_info, |
| 1904 | void *priv) |
| 1905 | { |
| 1906 | struct glink_open_config *open_config; |
| 1907 | static bool first = true; |
| 1908 | |
| 1909 | if (!cb_info) { |
| 1910 | pr_err("Missing callback data\n"); |
| 1911 | return; |
| 1912 | } |
| 1913 | |
| 1914 | switch (cb_info->link_state) { |
| 1915 | case GLINK_LINK_STATE_UP: |
| 1916 | if (first) |
| 1917 | first = false; |
| 1918 | else |
| 1919 | break; |
| 1920 | open_config = kzalloc(sizeof(*open_config), GFP_KERNEL); |
| 1921 | if (!open_config) { |
| 1922 | pr_err("Could not allocate memory\n"); |
| 1923 | break; |
| 1924 | } |
| 1925 | |
| 1926 | glink_data->open_cfg = open_config; |
| 1927 | pr_debug("glink link state up cb receieved\n"); |
| 1928 | INIT_WORK(&glink_data->work, msm_rpm_glink_open_work); |
| 1929 | |
| 1930 | open_config->priv = glink_data; |
| 1931 | open_config->name = glink_data->name; |
| 1932 | open_config->edge = glink_data->edge; |
| 1933 | open_config->notify_rx = msm_rpm_trans_notify_rx; |
| 1934 | open_config->notify_tx_done = msm_rpm_trans_notify_tx_done; |
| 1935 | open_config->notify_state = msm_rpm_trans_notify_state; |
| 1936 | schedule_work(&glink_data->work); |
| 1937 | break; |
| 1938 | default: |
| 1939 | pr_err("Unrecognised state = %d\n", cb_info->link_state); |
| 1940 | break; |
| 1941 | }; |
| 1942 | } |
| 1943 | |
| 1944 | static int msm_rpm_glink_dt_parse(struct platform_device *pdev, |
| 1945 | struct glink_apps_rpm_data *glink_data) |
| 1946 | { |
| 1947 | char *key = NULL; |
| 1948 | int ret; |
| 1949 | |
| 1950 | if (of_device_is_compatible(pdev->dev.of_node, "qcom,rpm-glink")) { |
| 1951 | glink_enabled = true; |
| 1952 | } else { |
| 1953 | pr_warn("qcom,rpm-glink compatible not matches\n"); |
| 1954 | ret = -EINVAL; |
| 1955 | return ret; |
| 1956 | } |
| 1957 | |
| 1958 | key = "qcom,glink-edge"; |
| 1959 | ret = of_property_read_string(pdev->dev.of_node, key, |
| 1960 | &glink_data->edge); |
| 1961 | if (ret) { |
| 1962 | pr_err("Failed to read node: %s, key=%s\n", |
| 1963 | pdev->dev.of_node->full_name, key); |
| 1964 | return ret; |
| 1965 | } |
| 1966 | |
| 1967 | key = "rpm-channel-name"; |
| 1968 | ret = of_property_read_string(pdev->dev.of_node, key, |
| 1969 | &glink_data->name); |
| 1970 | if (ret) |
| 1971 | pr_err("%s(): Failed to read node: %s, key=%s\n", __func__, |
| 1972 | pdev->dev.of_node->full_name, key); |
| 1973 | |
| 1974 | return ret; |
| 1975 | } |
| 1976 | |
| 1977 | static int msm_rpm_glink_link_setup(struct glink_apps_rpm_data *glink_data, |
| 1978 | struct platform_device *pdev) |
| 1979 | { |
| 1980 | struct glink_link_info *link_info; |
| 1981 | void *link_state_cb_handle; |
| 1982 | struct device *dev = &pdev->dev; |
| 1983 | int ret = 0; |
| 1984 | |
| 1985 | link_info = devm_kzalloc(dev, sizeof(struct glink_link_info), |
| 1986 | GFP_KERNEL); |
| 1987 | if (!link_info) { |
| 1988 | ret = -ENOMEM; |
| 1989 | return ret; |
| 1990 | } |
| 1991 | |
| 1992 | glink_data->link_info = link_info; |
| 1993 | |
| 1994 | /* |
| 1995 | * Setup link info parameters |
| 1996 | */ |
| 1997 | link_info->edge = glink_data->edge; |
| 1998 | link_info->glink_link_state_notif_cb = |
| 1999 | msm_rpm_glink_notifier_cb; |
| 2000 | link_state_cb_handle = glink_register_link_state_cb(link_info, NULL); |
| 2001 | if (IS_ERR_OR_NULL(link_state_cb_handle)) { |
| 2002 | pr_err("Could not register cb\n"); |
| 2003 | ret = PTR_ERR(link_state_cb_handle); |
| 2004 | return ret; |
| 2005 | } |
| 2006 | |
| 2007 | spin_lock_init(&msm_rpm_data.smd_lock_read); |
| 2008 | spin_lock_init(&msm_rpm_data.smd_lock_write); |
| 2009 | |
| 2010 | return ret; |
| 2011 | } |
| 2012 | |
| 2013 | static int msm_rpm_dev_glink_probe(struct platform_device *pdev) |
| 2014 | { |
| 2015 | int ret = -ENOMEM; |
| 2016 | struct device *dev = &pdev->dev; |
| 2017 | |
| 2018 | glink_data = devm_kzalloc(dev, sizeof(*glink_data), GFP_KERNEL); |
| 2019 | if (!glink_data) |
| 2020 | return ret; |
| 2021 | |
| 2022 | ret = msm_rpm_glink_dt_parse(pdev, glink_data); |
| 2023 | if (ret < 0) { |
| 2024 | devm_kfree(dev, glink_data); |
| 2025 | return ret; |
| 2026 | } |
| 2027 | |
| 2028 | ret = msm_rpm_glink_link_setup(glink_data, pdev); |
| 2029 | if (ret < 0) { |
| 2030 | /* |
| 2031 | * If the glink setup fails there is no |
| 2032 | * fall back mechanism to SMD. |
| 2033 | */ |
| 2034 | pr_err("GLINK setup fail ret = %d\n", ret); |
| 2035 | WARN_ON(1); |
| 2036 | } |
| 2037 | |
| 2038 | return ret; |
| 2039 | } |
| 2040 | |
| 2041 | static int msm_rpm_dev_probe(struct platform_device *pdev) |
| 2042 | { |
| 2043 | char *key = NULL; |
| 2044 | int ret = 0; |
| 2045 | void __iomem *reg_base; |
| 2046 | uint32_t version = V0_PROTOCOL_VERSION; /* set to default v0 format */ |
| 2047 | |
| 2048 | /* |
| 2049 | * Check for standalone support |
| 2050 | */ |
| 2051 | key = "rpm-standalone"; |
| 2052 | standalone = of_property_read_bool(pdev->dev.of_node, key); |
| 2053 | if (standalone) { |
| 2054 | probe_status = ret; |
| 2055 | goto skip_init; |
| 2056 | } |
| 2057 | |
| 2058 | reg_base = of_iomap(pdev->dev.of_node, 0); |
| 2059 | |
| 2060 | if (reg_base) { |
| 2061 | version = readq_relaxed(reg_base); |
| 2062 | iounmap(reg_base); |
| 2063 | } |
| 2064 | |
| 2065 | if (version == V1_PROTOCOL_VERSION) |
| 2066 | rpm_msg_fmt_ver = RPM_MSG_V1_FMT; |
| 2067 | |
| 2068 | pr_debug("RPM-SMD running version %d/n", rpm_msg_fmt_ver); |
| 2069 | |
| 2070 | ret = msm_rpm_dev_glink_probe(pdev); |
| 2071 | if (!ret) { |
| 2072 | pr_info("APSS-RPM communication over GLINK\n"); |
| 2073 | msm_rpm_send_buffer = msm_rpm_glink_send_buffer; |
| 2074 | of_platform_populate(pdev->dev.of_node, NULL, NULL, |
| 2075 | &pdev->dev); |
| 2076 | return ret; |
| 2077 | } |
| 2078 | msm_rpm_send_buffer = msm_rpm_send_smd_buffer; |
| 2079 | |
| 2080 | key = "rpm-channel-name"; |
| 2081 | ret = of_property_read_string(pdev->dev.of_node, key, |
| 2082 | &msm_rpm_data.ch_name); |
| 2083 | if (ret) { |
| 2084 | pr_err("%s(): Failed to read node: %s, key=%s\n", __func__, |
| 2085 | pdev->dev.of_node->full_name, key); |
| 2086 | goto fail; |
| 2087 | } |
| 2088 | |
| 2089 | key = "rpm-channel-type"; |
| 2090 | ret = of_property_read_u32(pdev->dev.of_node, key, |
| 2091 | &msm_rpm_data.ch_type); |
| 2092 | if (ret) { |
| 2093 | pr_err("%s(): Failed to read node: %s, key=%s\n", __func__, |
| 2094 | pdev->dev.of_node->full_name, key); |
| 2095 | goto fail; |
| 2096 | } |
| 2097 | |
| 2098 | ret = smd_named_open_on_edge(msm_rpm_data.ch_name, |
| 2099 | msm_rpm_data.ch_type, |
| 2100 | &msm_rpm_data.ch_info, |
| 2101 | &msm_rpm_data, |
| 2102 | msm_rpm_notify); |
| 2103 | if (ret) { |
| 2104 | if (ret != -EPROBE_DEFER) { |
| 2105 | pr_err("%s: Cannot open RPM channel %s %d\n", |
| 2106 | __func__, msm_rpm_data.ch_name, |
| 2107 | msm_rpm_data.ch_type); |
| 2108 | } |
| 2109 | goto fail; |
| 2110 | } |
| 2111 | |
| 2112 | spin_lock_init(&msm_rpm_data.smd_lock_write); |
| 2113 | spin_lock_init(&msm_rpm_data.smd_lock_read); |
| 2114 | tasklet_init(&data_tasklet, data_fn_tasklet, 0); |
| 2115 | |
| 2116 | wait_for_completion(&msm_rpm_data.smd_open); |
| 2117 | |
| 2118 | smd_disable_read_intr(msm_rpm_data.ch_info); |
| 2119 | |
Raju P.L.S.S.S.N | 43c1be7 | 2017-10-31 16:50:30 +0530 | [diff] [blame] | 2120 | probe_status = ret; |
| 2121 | skip_init: |
| 2122 | of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); |
| 2123 | |
| 2124 | if (standalone) |
| 2125 | pr_info("RPM running in standalone mode\n"); |
| 2126 | fail: |
| 2127 | return probe_status; |
| 2128 | } |
| 2129 | |
| 2130 | static const struct of_device_id msm_rpm_match_table[] = { |
| 2131 | {.compatible = "qcom,rpm-smd"}, |
| 2132 | {.compatible = "qcom,rpm-glink"}, |
| 2133 | {}, |
| 2134 | }; |
| 2135 | |
| 2136 | static struct platform_driver msm_rpm_device_driver = { |
| 2137 | .probe = msm_rpm_dev_probe, |
| 2138 | .driver = { |
| 2139 | .name = "rpm-smd", |
| 2140 | .owner = THIS_MODULE, |
| 2141 | .of_match_table = msm_rpm_match_table, |
| 2142 | }, |
| 2143 | }; |
| 2144 | |
| 2145 | int __init msm_rpm_driver_init(void) |
| 2146 | { |
| 2147 | static bool registered; |
| 2148 | |
| 2149 | if (registered) |
| 2150 | return 0; |
| 2151 | registered = true; |
| 2152 | |
| 2153 | return platform_driver_register(&msm_rpm_device_driver); |
| 2154 | } |
| 2155 | EXPORT_SYMBOL(msm_rpm_driver_init); |
| 2156 | arch_initcall(msm_rpm_driver_init); |