Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2011-2017, The Linux Foundation. All rights reserved. |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [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 | |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/string.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/err.h> |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/poll.h> |
| 24 | #include <linux/pm.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/uaccess.h> |
| 27 | #include <linux/debugfs.h> |
| 28 | #include <linux/rwsem.h> |
| 29 | #include <linux/ipc_logging.h> |
| 30 | #include <linux/uaccess.h> |
| 31 | #include <linux/ipc_router.h> |
| 32 | #include <linux/ipc_router_xprt.h> |
| 33 | #include <linux/kref.h> |
| 34 | #include <soc/qcom/subsystem_notif.h> |
| 35 | #include <soc/qcom/subsystem_restart.h> |
| 36 | |
| 37 | #include <asm/byteorder.h> |
| 38 | |
| 39 | #include "ipc_router_private.h" |
| 40 | #include "ipc_router_security.h" |
| 41 | |
| 42 | enum { |
| 43 | SMEM_LOG = 1U << 0, |
| 44 | RTR_DBG = 1U << 1, |
| 45 | }; |
| 46 | |
| 47 | static int msm_ipc_router_debug_mask; |
| 48 | module_param_named(debug_mask, msm_ipc_router_debug_mask, |
| 49 | int, 0664); |
| 50 | #define MODULE_NAME "ipc_router" |
| 51 | |
| 52 | #define IPC_RTR_INFO_PAGES 6 |
| 53 | |
| 54 | #define IPC_RTR_INFO(log_ctx, x...) do { \ |
| 55 | typeof(log_ctx) _log_ctx = (log_ctx); \ |
| 56 | if (_log_ctx) \ |
| 57 | ipc_log_string(_log_ctx, x); \ |
| 58 | if (msm_ipc_router_debug_mask & RTR_DBG) \ |
| 59 | pr_info("[IPCRTR] "x); \ |
| 60 | } while (0) |
| 61 | |
| 62 | #define IPC_ROUTER_LOG_EVENT_TX 0x01 |
| 63 | #define IPC_ROUTER_LOG_EVENT_RX 0x02 |
| 64 | #define IPC_ROUTER_LOG_EVENT_TX_ERR 0x03 |
| 65 | #define IPC_ROUTER_LOG_EVENT_RX_ERR 0x04 |
| 66 | #define IPC_ROUTER_DUMMY_DEST_NODE 0xFFFFFFFF |
| 67 | |
| 68 | #define ipc_port_sk(port) ((struct sock *)(port)) |
| 69 | |
| 70 | static LIST_HEAD(control_ports); |
| 71 | static DECLARE_RWSEM(control_ports_lock_lha5); |
| 72 | |
| 73 | #define LP_HASH_SIZE 32 |
| 74 | static struct list_head local_ports[LP_HASH_SIZE]; |
| 75 | static DECLARE_RWSEM(local_ports_lock_lhc2); |
| 76 | |
| 77 | /* Server info is organized as a hash table. The server's service ID is |
| 78 | * used to index into the hash table. The instance ID of most of the servers |
| 79 | * are 1 or 2. The service IDs are well distributed compared to the instance |
| 80 | * IDs and hence choosing service ID to index into this hash table optimizes |
| 81 | * the hash table operations like add, lookup, destroy. |
| 82 | */ |
| 83 | #define SRV_HASH_SIZE 32 |
| 84 | static struct list_head server_list[SRV_HASH_SIZE]; |
| 85 | static DECLARE_RWSEM(server_list_lock_lha2); |
| 86 | |
| 87 | struct msm_ipc_server { |
| 88 | struct list_head list; |
| 89 | struct kref ref; |
| 90 | struct msm_ipc_port_name name; |
| 91 | char pdev_name[32]; |
| 92 | int next_pdev_id; |
| 93 | int synced_sec_rule; |
| 94 | struct list_head server_port_list; |
| 95 | }; |
| 96 | |
| 97 | struct msm_ipc_server_port { |
| 98 | struct list_head list; |
| 99 | struct platform_device *pdev; |
| 100 | struct msm_ipc_port_addr server_addr; |
| 101 | struct msm_ipc_router_xprt_info *xprt_info; |
| 102 | }; |
| 103 | |
| 104 | struct msm_ipc_resume_tx_port { |
| 105 | struct list_head list; |
| 106 | u32 port_id; |
| 107 | u32 node_id; |
| 108 | }; |
| 109 | |
| 110 | struct ipc_router_conn_info { |
| 111 | struct list_head list; |
| 112 | u32 port_id; |
| 113 | }; |
| 114 | |
| 115 | enum { |
| 116 | RESET = 0, |
| 117 | VALID = 1, |
| 118 | }; |
| 119 | |
| 120 | #define RP_HASH_SIZE 32 |
| 121 | struct msm_ipc_router_remote_port { |
| 122 | struct list_head list; |
| 123 | struct kref ref; |
| 124 | struct mutex rport_lock_lhb2; /* lock for remote port state access */ |
| 125 | u32 node_id; |
| 126 | u32 port_id; |
| 127 | int status; |
| 128 | u32 tx_quota_cnt; |
| 129 | struct list_head resume_tx_port_list; |
| 130 | struct list_head conn_info_list; |
| 131 | void *sec_rule; |
| 132 | struct msm_ipc_server *server; |
| 133 | }; |
| 134 | |
| 135 | struct msm_ipc_router_xprt_info { |
| 136 | struct list_head list; |
| 137 | struct msm_ipc_router_xprt *xprt; |
| 138 | u32 remote_node_id; |
| 139 | u32 initialized; |
| 140 | struct list_head pkt_list; |
| 141 | struct wakeup_source ws; |
| 142 | struct mutex rx_lock_lhb2; /* lock for xprt rx operations */ |
| 143 | struct mutex tx_lock_lhb2; /* lock for xprt tx operations */ |
| 144 | u32 need_len; |
| 145 | u32 abort_data_read; |
| 146 | struct work_struct read_data; |
| 147 | struct workqueue_struct *workqueue; |
| 148 | void *log_ctx; |
| 149 | struct kref ref; |
| 150 | struct completion ref_complete; |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 151 | bool dynamic_ws; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 152 | }; |
| 153 | |
| 154 | #define RT_HASH_SIZE 4 |
| 155 | struct msm_ipc_routing_table_entry { |
| 156 | struct list_head list; |
| 157 | struct kref ref; |
| 158 | u32 node_id; |
| 159 | u32 neighbor_node_id; |
| 160 | struct list_head remote_port_list[RP_HASH_SIZE]; |
| 161 | struct msm_ipc_router_xprt_info *xprt_info; |
| 162 | struct rw_semaphore lock_lha4; |
| 163 | unsigned long num_tx_bytes; |
| 164 | unsigned long num_rx_bytes; |
| 165 | }; |
| 166 | |
| 167 | #define LOG_CTX_NAME_LEN 32 |
| 168 | struct ipc_rtr_log_ctx { |
| 169 | struct list_head list; |
| 170 | char log_ctx_name[LOG_CTX_NAME_LEN]; |
| 171 | void *log_ctx; |
| 172 | }; |
| 173 | |
| 174 | static struct list_head routing_table[RT_HASH_SIZE]; |
| 175 | static DECLARE_RWSEM(routing_table_lock_lha3); |
| 176 | static int routing_table_inited; |
| 177 | |
| 178 | static void do_read_data(struct work_struct *work); |
| 179 | |
| 180 | static LIST_HEAD(xprt_info_list); |
| 181 | static DECLARE_RWSEM(xprt_info_list_lock_lha5); |
| 182 | |
| 183 | static DEFINE_MUTEX(log_ctx_list_lock_lha0); |
| 184 | static LIST_HEAD(log_ctx_list); |
| 185 | static DEFINE_MUTEX(ipc_router_init_lock); |
| 186 | static bool is_ipc_router_inited; |
| 187 | static int ipc_router_core_init(void); |
| 188 | #define IPC_ROUTER_INIT_TIMEOUT (10 * HZ) |
| 189 | |
| 190 | static u32 next_port_id; |
| 191 | static DEFINE_MUTEX(next_port_id_lock_lhc1); |
| 192 | static struct workqueue_struct *msm_ipc_router_workqueue; |
| 193 | |
| 194 | static void *local_log_ctx; |
| 195 | static void *ipc_router_get_log_ctx(char *sub_name); |
| 196 | static int process_resume_tx_msg(union rr_control_msg *msg, |
| 197 | struct rr_packet *pkt); |
| 198 | static void ipc_router_reset_conn(struct msm_ipc_router_remote_port *rport_ptr); |
| 199 | static int ipc_router_get_xprt_info_ref( |
| 200 | struct msm_ipc_router_xprt_info *xprt_info); |
| 201 | static void ipc_router_put_xprt_info_ref( |
| 202 | struct msm_ipc_router_xprt_info *xprt_info); |
| 203 | static void ipc_router_release_xprt_info_ref(struct kref *ref); |
| 204 | |
| 205 | struct pil_vote_info { |
| 206 | void *pil_handle; |
| 207 | struct work_struct load_work; |
| 208 | struct work_struct unload_work; |
| 209 | }; |
| 210 | |
| 211 | #define PIL_SUBSYSTEM_NAME_LEN 32 |
| 212 | static char default_peripheral[PIL_SUBSYSTEM_NAME_LEN]; |
| 213 | |
| 214 | enum { |
| 215 | DOWN, |
| 216 | UP, |
| 217 | }; |
| 218 | |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 219 | static bool is_wakeup_source_allowed; |
| 220 | |
| 221 | void msm_ipc_router_set_ws_allowed(bool flag) |
| 222 | { |
| 223 | is_wakeup_source_allowed = flag; |
| 224 | } |
| 225 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 226 | static void init_routing_table(void) |
| 227 | { |
| 228 | int i; |
| 229 | |
| 230 | for (i = 0; i < RT_HASH_SIZE; i++) |
| 231 | INIT_LIST_HEAD(&routing_table[i]); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * ipc_router_calc_checksum() - compute the checksum for extended HELLO message |
| 236 | * @msg: Reference to the IPC Router HELLO message. |
| 237 | * |
| 238 | * Return: Computed checksum value, 0 if msg is NULL. |
| 239 | */ |
| 240 | static u32 ipc_router_calc_checksum(union rr_control_msg *msg) |
| 241 | { |
| 242 | u32 checksum = 0; |
| 243 | int i, len; |
| 244 | u16 upper_nb; |
| 245 | u16 lower_nb; |
| 246 | void *hello; |
| 247 | |
| 248 | if (!msg) |
| 249 | return checksum; |
| 250 | hello = msg; |
| 251 | len = sizeof(*msg); |
| 252 | |
| 253 | for (i = 0; i < len / IPCR_WORD_SIZE; i++) { |
| 254 | lower_nb = (*((u32 *)hello)) & IPC_ROUTER_CHECKSUM_MASK; |
| 255 | upper_nb = ((*((u32 *)hello)) >> 16) & |
| 256 | IPC_ROUTER_CHECKSUM_MASK; |
| 257 | checksum = checksum + upper_nb + lower_nb; |
| 258 | hello = ((u32 *)hello) + 1; |
| 259 | } |
| 260 | while (checksum > 0xFFFF) |
| 261 | checksum = (checksum & IPC_ROUTER_CHECKSUM_MASK) + |
| 262 | ((checksum >> 16) & IPC_ROUTER_CHECKSUM_MASK); |
| 263 | |
| 264 | checksum = ~checksum & IPC_ROUTER_CHECKSUM_MASK; |
| 265 | return checksum; |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * skb_copy_to_log_buf() - copies the required number bytes from the skb_queue |
| 270 | * @skb_head: skb_queue head that contains the data. |
| 271 | * @pl_len: length of payload need to be copied. |
| 272 | * @hdr_offset: length of the header present in first skb |
| 273 | * @log_buf: The output buffer which will contain the formatted log string |
| 274 | * |
| 275 | * This function copies the first specified number of bytes from the skb_queue |
| 276 | * to a new buffer and formats them to a string for logging. |
| 277 | */ |
| 278 | static void skb_copy_to_log_buf(struct sk_buff_head *skb_head, |
| 279 | unsigned int pl_len, unsigned int hdr_offset, |
| 280 | u64 *log_buf) |
| 281 | { |
| 282 | struct sk_buff *temp_skb; |
| 283 | unsigned int copied_len = 0, copy_len = 0; |
| 284 | int remaining; |
| 285 | |
| 286 | if (!skb_head) { |
| 287 | IPC_RTR_ERR("%s: NULL skb_head\n", __func__); |
| 288 | return; |
| 289 | } |
| 290 | temp_skb = skb_peek(skb_head); |
| 291 | if (unlikely(!temp_skb || !temp_skb->data)) { |
| 292 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 293 | return; |
| 294 | } |
| 295 | |
| 296 | remaining = temp_skb->len - hdr_offset; |
| 297 | skb_queue_walk(skb_head, temp_skb) { |
| 298 | copy_len = remaining < pl_len ? remaining : pl_len; |
| 299 | memcpy(log_buf + copied_len, temp_skb->data + hdr_offset, |
| 300 | copy_len); |
| 301 | copied_len += copy_len; |
| 302 | hdr_offset = 0; |
| 303 | if (copied_len == pl_len) |
| 304 | break; |
| 305 | remaining = pl_len - remaining; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * ipc_router_log_msg() - log all data messages exchanged |
| 311 | * @log_ctx: IPC Logging context specific to each transport |
| 312 | * @xchng_type: Identifies the data to be a receive or send. |
| 313 | * @data: IPC Router data packet or control msg received or to be send. |
| 314 | * @hdr: Reference to the router header |
| 315 | * @port_ptr: Local IPC Router port. |
| 316 | * @rport_ptr: Remote IPC Router port |
| 317 | * |
| 318 | * This function builds the log message that would be passed on to the IPC |
| 319 | * logging framework. The data messages that would be passed corresponds to |
| 320 | * the information that is exchanged between the IPC Router and it's clients. |
| 321 | */ |
| 322 | static void ipc_router_log_msg(void *log_ctx, u32 xchng_type, |
| 323 | void *data, struct rr_header_v1 *hdr, |
| 324 | struct msm_ipc_port *port_ptr, |
| 325 | struct msm_ipc_router_remote_port *rport_ptr) |
| 326 | { |
| 327 | struct sk_buff_head *skb_head = NULL; |
| 328 | union rr_control_msg *msg = NULL; |
| 329 | struct rr_packet *pkt = NULL; |
| 330 | u64 pl_buf = 0; |
| 331 | struct sk_buff *skb; |
| 332 | u32 buf_len = 8; |
| 333 | u32 svc_id = 0; |
| 334 | u32 svc_ins = 0; |
| 335 | unsigned int hdr_offset = 0; |
| 336 | u32 port_type = 0; |
| 337 | |
| 338 | if (!log_ctx || !hdr || !data) |
| 339 | return; |
| 340 | |
| 341 | if (hdr->type == IPC_ROUTER_CTRL_CMD_DATA) { |
| 342 | pkt = (struct rr_packet *)data; |
| 343 | skb_head = pkt->pkt_fragment_q; |
| 344 | skb = skb_peek(skb_head); |
| 345 | if (!skb || !skb->data) { |
| 346 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 347 | return; |
| 348 | } |
| 349 | |
| 350 | if (skb_queue_len(skb_head) == 1 && skb->len < 8) |
| 351 | buf_len = skb->len; |
| 352 | if (xchng_type == IPC_ROUTER_LOG_EVENT_TX && hdr->dst_node_id |
| 353 | != IPC_ROUTER_NID_LOCAL) { |
| 354 | if (hdr->version == IPC_ROUTER_V1) |
| 355 | hdr_offset = sizeof(struct rr_header_v1); |
| 356 | else if (hdr->version == IPC_ROUTER_V2) |
| 357 | hdr_offset = sizeof(struct rr_header_v2); |
| 358 | } |
| 359 | skb_copy_to_log_buf(skb_head, buf_len, hdr_offset, &pl_buf); |
| 360 | |
| 361 | if (port_ptr && rport_ptr && (port_ptr->type == CLIENT_PORT) && |
| 362 | rport_ptr->server) { |
| 363 | svc_id = rport_ptr->server->name.service; |
| 364 | svc_ins = rport_ptr->server->name.instance; |
| 365 | port_type = CLIENT_PORT; |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame^] | 366 | port_ptr->last_served_svc_id = |
| 367 | rport_ptr->server->name.service; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 368 | } else if (port_ptr && (port_ptr->type == SERVER_PORT)) { |
| 369 | svc_id = port_ptr->port_name.service; |
| 370 | svc_ins = port_ptr->port_name.instance; |
| 371 | port_type = SERVER_PORT; |
| 372 | } |
| 373 | IPC_RTR_INFO(log_ctx, |
| 374 | "%s %s %s Len:0x%x T:0x%x CF:0x%x SVC:<0x%x:0x%x> SRC:<0x%x:0x%x> DST:<0x%x:0x%x> DATA: %08x %08x", |
| 375 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "" : |
| 376 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? |
| 377 | current->comm : "")), |
| 378 | (port_type == CLIENT_PORT ? "CLI" : "SRV"), |
| 379 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 380 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| 381 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX_ERR ? "TX_ERR" : |
| 382 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX_ERR ? "RX_ERR" : |
| 383 | "UNKNOWN")))), |
| 384 | hdr->size, hdr->type, hdr->control_flag, |
| 385 | svc_id, svc_ins, hdr->src_node_id, hdr->src_port_id, |
| 386 | hdr->dst_node_id, hdr->dst_port_id, |
| 387 | (unsigned int)pl_buf, (unsigned int)(pl_buf >> 32)); |
| 388 | |
| 389 | } else { |
| 390 | msg = (union rr_control_msg *)data; |
| 391 | if (msg->cmd == IPC_ROUTER_CTRL_CMD_NEW_SERVER || |
| 392 | msg->cmd == IPC_ROUTER_CTRL_CMD_REMOVE_SERVER) |
| 393 | IPC_RTR_INFO(log_ctx, |
| 394 | "CTL MSG: %s cmd:0x%x SVC:<0x%x:0x%x> ADDR:<0x%x:0x%x>", |
| 395 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 396 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| 397 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX_ERR ? "TX_ERR" : |
| 398 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX_ERR ? "RX_ERR" : |
| 399 | "UNKNOWN")))), |
| 400 | msg->cmd, msg->srv.service, msg->srv.instance, |
| 401 | msg->srv.node_id, msg->srv.port_id); |
| 402 | else if (msg->cmd == IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT || |
| 403 | msg->cmd == IPC_ROUTER_CTRL_CMD_RESUME_TX) |
| 404 | IPC_RTR_INFO(log_ctx, |
| 405 | "CTL MSG: %s cmd:0x%x ADDR: <0x%x:0x%x>", |
| 406 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 407 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| 408 | msg->cmd, msg->cli.node_id, msg->cli.port_id); |
| 409 | else if (msg->cmd == IPC_ROUTER_CTRL_CMD_HELLO && hdr) |
| 410 | IPC_RTR_INFO(log_ctx, |
| 411 | "CTL MSG %s cmd:0x%x ADDR:0x%x", |
| 412 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 413 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| 414 | msg->cmd, hdr->src_node_id); |
| 415 | else |
| 416 | IPC_RTR_INFO(log_ctx, |
| 417 | "%s UNKNOWN cmd:0x%x", |
| 418 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 419 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| 420 | msg->cmd); |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | /* Must be called with routing_table_lock_lha3 locked. */ |
| 425 | static struct msm_ipc_routing_table_entry *lookup_routing_table( |
| 426 | u32 node_id) |
| 427 | { |
| 428 | u32 key = (node_id % RT_HASH_SIZE); |
| 429 | struct msm_ipc_routing_table_entry *rt_entry; |
| 430 | |
| 431 | list_for_each_entry(rt_entry, &routing_table[key], list) { |
| 432 | if (rt_entry->node_id == node_id) |
| 433 | return rt_entry; |
| 434 | } |
| 435 | return NULL; |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * create_routing_table_entry() - Lookup and create a routing table entry |
| 440 | * @node_id: Node ID of the routing table entry to be created. |
| 441 | * @xprt_info: XPRT through which the node ID is reachable. |
| 442 | * |
| 443 | * @return: a reference to the routing table entry on success, NULL on failure. |
| 444 | */ |
| 445 | static struct msm_ipc_routing_table_entry *create_routing_table_entry( |
| 446 | u32 node_id, struct msm_ipc_router_xprt_info *xprt_info) |
| 447 | { |
| 448 | int i; |
| 449 | struct msm_ipc_routing_table_entry *rt_entry; |
| 450 | u32 key; |
| 451 | |
| 452 | down_write(&routing_table_lock_lha3); |
| 453 | rt_entry = lookup_routing_table(node_id); |
| 454 | if (rt_entry) |
| 455 | goto out_create_rtentry1; |
| 456 | |
| 457 | rt_entry = kmalloc(sizeof(*rt_entry), GFP_KERNEL); |
| 458 | if (!rt_entry) { |
| 459 | IPC_RTR_ERR("%s: rt_entry allocation failed for %d\n", |
| 460 | __func__, node_id); |
| 461 | goto out_create_rtentry2; |
| 462 | } |
| 463 | |
| 464 | for (i = 0; i < RP_HASH_SIZE; i++) |
| 465 | INIT_LIST_HEAD(&rt_entry->remote_port_list[i]); |
| 466 | init_rwsem(&rt_entry->lock_lha4); |
| 467 | kref_init(&rt_entry->ref); |
| 468 | rt_entry->node_id = node_id; |
| 469 | rt_entry->xprt_info = xprt_info; |
| 470 | if (xprt_info) |
| 471 | rt_entry->neighbor_node_id = xprt_info->remote_node_id; |
| 472 | |
| 473 | key = (node_id % RT_HASH_SIZE); |
| 474 | list_add_tail(&rt_entry->list, &routing_table[key]); |
| 475 | out_create_rtentry1: |
| 476 | kref_get(&rt_entry->ref); |
| 477 | out_create_rtentry2: |
| 478 | up_write(&routing_table_lock_lha3); |
| 479 | return rt_entry; |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * ipc_router_get_rtentry_ref() - Get a reference to the routing table entry |
| 484 | * @node_id: Node ID of the routing table entry. |
| 485 | * |
| 486 | * @return: a reference to the routing table entry on success, NULL on failure. |
| 487 | * |
| 488 | * This function is used to obtain a reference to the rounting table entry |
| 489 | * corresponding to a node id. |
| 490 | */ |
| 491 | static struct msm_ipc_routing_table_entry *ipc_router_get_rtentry_ref( |
| 492 | u32 node_id) |
| 493 | { |
| 494 | struct msm_ipc_routing_table_entry *rt_entry; |
| 495 | |
| 496 | down_read(&routing_table_lock_lha3); |
| 497 | rt_entry = lookup_routing_table(node_id); |
| 498 | if (rt_entry) |
| 499 | kref_get(&rt_entry->ref); |
| 500 | up_read(&routing_table_lock_lha3); |
| 501 | return rt_entry; |
| 502 | } |
| 503 | |
| 504 | /** |
| 505 | * ipc_router_release_rtentry() - Cleanup and release the routing table entry |
| 506 | * @ref: Reference to the entry. |
| 507 | * |
| 508 | * This function is called when all references to the routing table entry are |
| 509 | * released. |
| 510 | */ |
| 511 | void ipc_router_release_rtentry(struct kref *ref) |
| 512 | { |
| 513 | struct msm_ipc_routing_table_entry *rt_entry = |
| 514 | container_of(ref, struct msm_ipc_routing_table_entry, ref); |
| 515 | |
| 516 | /* All references to a routing entry will be put only under SSR. |
| 517 | * As part of SSR, all the internals of the routing table entry |
| 518 | * are cleaned. So just free the routing table entry. |
| 519 | */ |
| 520 | kfree(rt_entry); |
| 521 | } |
| 522 | |
| 523 | struct rr_packet *rr_read(struct msm_ipc_router_xprt_info *xprt_info) |
| 524 | { |
| 525 | struct rr_packet *temp_pkt; |
| 526 | |
| 527 | if (!xprt_info) |
| 528 | return NULL; |
| 529 | |
| 530 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 531 | if (xprt_info->abort_data_read) { |
| 532 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 533 | IPC_RTR_ERR("%s detected SSR & exiting now\n", |
| 534 | xprt_info->xprt->name); |
| 535 | return NULL; |
| 536 | } |
| 537 | |
| 538 | if (list_empty(&xprt_info->pkt_list)) { |
| 539 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 540 | return NULL; |
| 541 | } |
| 542 | |
| 543 | temp_pkt = list_first_entry(&xprt_info->pkt_list, |
| 544 | struct rr_packet, list); |
| 545 | list_del(&temp_pkt->list); |
| 546 | if (list_empty(&xprt_info->pkt_list)) |
| 547 | __pm_relax(&xprt_info->ws); |
| 548 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 549 | return temp_pkt; |
| 550 | } |
| 551 | |
| 552 | struct rr_packet *clone_pkt(struct rr_packet *pkt) |
| 553 | { |
| 554 | struct rr_packet *cloned_pkt; |
| 555 | struct sk_buff *temp_skb, *cloned_skb; |
| 556 | struct sk_buff_head *pkt_fragment_q; |
| 557 | |
| 558 | cloned_pkt = kzalloc(sizeof(*cloned_pkt), GFP_KERNEL); |
| 559 | if (!cloned_pkt) { |
| 560 | IPC_RTR_ERR("%s: failure\n", __func__); |
| 561 | return NULL; |
| 562 | } |
| 563 | memcpy(&cloned_pkt->hdr, &pkt->hdr, sizeof(struct rr_header_v1)); |
| 564 | if (pkt->opt_hdr.len > 0) { |
| 565 | cloned_pkt->opt_hdr.data = kmalloc(pkt->opt_hdr.len, |
| 566 | GFP_KERNEL); |
| 567 | if (!cloned_pkt->opt_hdr.data) { |
| 568 | IPC_RTR_ERR("%s: Memory allocation Failed\n", __func__); |
| 569 | } else { |
| 570 | cloned_pkt->opt_hdr.len = pkt->opt_hdr.len; |
| 571 | memcpy(cloned_pkt->opt_hdr.data, pkt->opt_hdr.data, |
| 572 | pkt->opt_hdr.len); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | pkt_fragment_q = kmalloc(sizeof(*pkt_fragment_q), GFP_KERNEL); |
| 577 | if (!pkt_fragment_q) { |
| 578 | IPC_RTR_ERR("%s: pkt_frag_q alloc failure\n", __func__); |
| 579 | kfree(cloned_pkt); |
| 580 | return NULL; |
| 581 | } |
| 582 | skb_queue_head_init(pkt_fragment_q); |
| 583 | kref_init(&cloned_pkt->ref); |
| 584 | |
| 585 | skb_queue_walk(pkt->pkt_fragment_q, temp_skb) { |
| 586 | cloned_skb = skb_clone(temp_skb, GFP_KERNEL); |
| 587 | if (!cloned_skb) |
| 588 | goto fail_clone; |
| 589 | skb_queue_tail(pkt_fragment_q, cloned_skb); |
| 590 | } |
| 591 | cloned_pkt->pkt_fragment_q = pkt_fragment_q; |
| 592 | cloned_pkt->length = pkt->length; |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 593 | cloned_pkt->ws_need = pkt->ws_need; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 594 | return cloned_pkt; |
| 595 | |
| 596 | fail_clone: |
| 597 | while (!skb_queue_empty(pkt_fragment_q)) { |
| 598 | temp_skb = skb_dequeue(pkt_fragment_q); |
| 599 | kfree_skb(temp_skb); |
| 600 | } |
| 601 | kfree(pkt_fragment_q); |
| 602 | if (cloned_pkt->opt_hdr.len > 0) |
| 603 | kfree(cloned_pkt->opt_hdr.data); |
| 604 | kfree(cloned_pkt); |
| 605 | return NULL; |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * create_pkt() - Create a Router packet |
| 610 | * @data: SKB queue to be contained inside the packet. |
| 611 | * |
| 612 | * @return: pointer to packet on success, NULL on failure. |
| 613 | */ |
| 614 | struct rr_packet *create_pkt(struct sk_buff_head *data) |
| 615 | { |
| 616 | struct rr_packet *pkt; |
| 617 | struct sk_buff *temp_skb; |
| 618 | |
| 619 | pkt = kzalloc(sizeof(*pkt), GFP_KERNEL); |
| 620 | if (!pkt) { |
| 621 | IPC_RTR_ERR("%s: failure\n", __func__); |
| 622 | return NULL; |
| 623 | } |
| 624 | |
| 625 | if (data) { |
| 626 | pkt->pkt_fragment_q = data; |
| 627 | skb_queue_walk(pkt->pkt_fragment_q, temp_skb) |
| 628 | pkt->length += temp_skb->len; |
| 629 | } else { |
| 630 | pkt->pkt_fragment_q = kmalloc(sizeof(*pkt->pkt_fragment_q), |
| 631 | GFP_KERNEL); |
| 632 | if (!pkt->pkt_fragment_q) { |
| 633 | IPC_RTR_ERR("%s: Couldn't alloc pkt_fragment_q\n", |
| 634 | __func__); |
| 635 | kfree(pkt); |
| 636 | return NULL; |
| 637 | } |
| 638 | skb_queue_head_init(pkt->pkt_fragment_q); |
| 639 | } |
| 640 | kref_init(&pkt->ref); |
| 641 | return pkt; |
| 642 | } |
| 643 | |
| 644 | void release_pkt(struct rr_packet *pkt) |
| 645 | { |
| 646 | struct sk_buff *temp_skb; |
| 647 | |
| 648 | if (!pkt) |
| 649 | return; |
| 650 | |
| 651 | if (!pkt->pkt_fragment_q) { |
| 652 | kfree(pkt); |
| 653 | return; |
| 654 | } |
| 655 | |
| 656 | while (!skb_queue_empty(pkt->pkt_fragment_q)) { |
| 657 | temp_skb = skb_dequeue(pkt->pkt_fragment_q); |
| 658 | kfree_skb(temp_skb); |
| 659 | } |
| 660 | kfree(pkt->pkt_fragment_q); |
| 661 | if (pkt->opt_hdr.len > 0) |
| 662 | kfree(pkt->opt_hdr.data); |
| 663 | kfree(pkt); |
| 664 | } |
| 665 | |
| 666 | static struct sk_buff_head *msm_ipc_router_buf_to_skb(void *buf, |
| 667 | unsigned int buf_len) |
| 668 | { |
| 669 | struct sk_buff_head *skb_head; |
| 670 | struct sk_buff *skb; |
| 671 | int first = 1, offset = 0; |
| 672 | int skb_size, data_size; |
| 673 | void *data; |
| 674 | int last = 1; |
| 675 | int align_size; |
| 676 | |
| 677 | skb_head = kmalloc(sizeof(*skb_head), GFP_KERNEL); |
| 678 | if (!skb_head) { |
| 679 | IPC_RTR_ERR("%s: Couldnot allocate skb_head\n", __func__); |
| 680 | return NULL; |
| 681 | } |
| 682 | skb_queue_head_init(skb_head); |
| 683 | |
| 684 | data_size = buf_len; |
| 685 | align_size = ALIGN_SIZE(data_size); |
| 686 | while (offset != buf_len) { |
| 687 | skb_size = data_size; |
| 688 | if (first) |
| 689 | skb_size += IPC_ROUTER_HDR_SIZE; |
| 690 | if (last) |
| 691 | skb_size += align_size; |
| 692 | |
| 693 | skb = alloc_skb(skb_size, GFP_KERNEL); |
| 694 | if (!skb) { |
| 695 | if (skb_size <= (PAGE_SIZE / 2)) { |
| 696 | IPC_RTR_ERR("%s: cannot allocate skb\n", |
| 697 | __func__); |
| 698 | goto buf_to_skb_error; |
| 699 | } |
| 700 | data_size = data_size / 2; |
| 701 | last = 0; |
| 702 | continue; |
| 703 | } |
| 704 | |
| 705 | if (first) { |
| 706 | skb_reserve(skb, IPC_ROUTER_HDR_SIZE); |
| 707 | first = 0; |
| 708 | } |
| 709 | |
| 710 | data = skb_put(skb, data_size); |
| 711 | memcpy(skb->data, buf + offset, data_size); |
| 712 | skb_queue_tail(skb_head, skb); |
| 713 | offset += data_size; |
| 714 | data_size = buf_len - offset; |
| 715 | last = 1; |
| 716 | } |
| 717 | return skb_head; |
| 718 | |
| 719 | buf_to_skb_error: |
| 720 | while (!skb_queue_empty(skb_head)) { |
| 721 | skb = skb_dequeue(skb_head); |
| 722 | kfree_skb(skb); |
| 723 | } |
| 724 | kfree(skb_head); |
| 725 | return NULL; |
| 726 | } |
| 727 | |
| 728 | static void *msm_ipc_router_skb_to_buf(struct sk_buff_head *skb_head, |
| 729 | unsigned int len) |
| 730 | { |
| 731 | struct sk_buff *temp; |
| 732 | unsigned int offset = 0, buf_len = 0, copy_len; |
| 733 | void *buf; |
| 734 | |
| 735 | if (!skb_head) { |
| 736 | IPC_RTR_ERR("%s: NULL skb_head\n", __func__); |
| 737 | return NULL; |
| 738 | } |
| 739 | |
| 740 | temp = skb_peek(skb_head); |
| 741 | buf_len = len; |
| 742 | buf = kmalloc(buf_len, GFP_KERNEL); |
| 743 | if (!buf) { |
| 744 | IPC_RTR_ERR("%s: cannot allocate buf\n", __func__); |
| 745 | return NULL; |
| 746 | } |
| 747 | skb_queue_walk(skb_head, temp) { |
| 748 | copy_len = buf_len < temp->len ? buf_len : temp->len; |
| 749 | memcpy(buf + offset, temp->data, copy_len); |
| 750 | offset += copy_len; |
| 751 | buf_len -= copy_len; |
| 752 | } |
| 753 | return buf; |
| 754 | } |
| 755 | |
| 756 | void msm_ipc_router_free_skb(struct sk_buff_head *skb_head) |
| 757 | { |
| 758 | struct sk_buff *temp_skb; |
| 759 | |
| 760 | if (!skb_head) |
| 761 | return; |
| 762 | |
| 763 | while (!skb_queue_empty(skb_head)) { |
| 764 | temp_skb = skb_dequeue(skb_head); |
| 765 | kfree_skb(temp_skb); |
| 766 | } |
| 767 | kfree(skb_head); |
| 768 | } |
| 769 | |
| 770 | /** |
| 771 | * extract_optional_header() - Extract the optional header from skb |
| 772 | * @pkt: Packet structure into which the header has to be extracted. |
| 773 | * @opt_len: The optional header length in word size. |
| 774 | * |
| 775 | * @return: Length of optional header in bytes if success, zero otherwise. |
| 776 | */ |
| 777 | static int extract_optional_header(struct rr_packet *pkt, u8 opt_len) |
| 778 | { |
| 779 | size_t offset = 0, buf_len = 0, copy_len, opt_hdr_len; |
| 780 | struct sk_buff *temp; |
| 781 | struct sk_buff_head *skb_head; |
| 782 | |
| 783 | opt_hdr_len = opt_len * IPCR_WORD_SIZE; |
| 784 | pkt->opt_hdr.data = kmalloc(opt_hdr_len, GFP_KERNEL); |
| 785 | if (!pkt->opt_hdr.data) { |
| 786 | IPC_RTR_ERR("%s: Memory allocation Failed\n", __func__); |
| 787 | return 0; |
| 788 | } |
| 789 | skb_head = pkt->pkt_fragment_q; |
| 790 | buf_len = opt_hdr_len; |
| 791 | skb_queue_walk(skb_head, temp) { |
| 792 | copy_len = buf_len < temp->len ? buf_len : temp->len; |
| 793 | memcpy(pkt->opt_hdr.data + offset, temp->data, copy_len); |
| 794 | offset += copy_len; |
| 795 | buf_len -= copy_len; |
| 796 | skb_pull(temp, copy_len); |
| 797 | if (temp->len == 0) { |
| 798 | skb_dequeue(skb_head); |
| 799 | kfree_skb(temp); |
| 800 | } |
| 801 | } |
| 802 | pkt->opt_hdr.len = opt_hdr_len; |
| 803 | return opt_hdr_len; |
| 804 | } |
| 805 | |
| 806 | /** |
| 807 | * extract_header_v1() - Extract IPC Router header of version 1 |
| 808 | * @pkt: Packet structure into which the header has to be extraced. |
| 809 | * @skb: SKB from which the header has to be extracted. |
| 810 | * |
| 811 | * @return: 0 on success, standard Linux error codes on failure. |
| 812 | */ |
| 813 | static int extract_header_v1(struct rr_packet *pkt, struct sk_buff *skb) |
| 814 | { |
| 815 | if (!pkt || !skb) { |
| 816 | IPC_RTR_ERR("%s: Invalid pkt or skb\n", __func__); |
| 817 | return -EINVAL; |
| 818 | } |
| 819 | |
| 820 | memcpy(&pkt->hdr, skb->data, sizeof(struct rr_header_v1)); |
| 821 | skb_pull(skb, sizeof(struct rr_header_v1)); |
| 822 | pkt->length -= sizeof(struct rr_header_v1); |
| 823 | return 0; |
| 824 | } |
| 825 | |
| 826 | /** |
| 827 | * extract_header_v2() - Extract IPC Router header of version 2 |
| 828 | * @pkt: Packet structure into which the header has to be extraced. |
| 829 | * @skb: SKB from which the header has to be extracted. |
| 830 | * |
| 831 | * @return: 0 on success, standard Linux error codes on failure. |
| 832 | */ |
| 833 | static int extract_header_v2(struct rr_packet *pkt, struct sk_buff *skb) |
| 834 | { |
| 835 | struct rr_header_v2 *hdr; |
| 836 | u8 opt_len; |
| 837 | size_t opt_hdr_len; |
| 838 | size_t total_hdr_size = sizeof(*hdr); |
| 839 | |
| 840 | if (!pkt || !skb) { |
| 841 | IPC_RTR_ERR("%s: Invalid pkt or skb\n", __func__); |
| 842 | return -EINVAL; |
| 843 | } |
| 844 | |
| 845 | hdr = (struct rr_header_v2 *)skb->data; |
| 846 | pkt->hdr.version = (u32)hdr->version; |
| 847 | pkt->hdr.type = (u32)hdr->type; |
| 848 | pkt->hdr.src_node_id = (u32)hdr->src_node_id; |
| 849 | pkt->hdr.src_port_id = (u32)hdr->src_port_id; |
| 850 | pkt->hdr.size = (u32)hdr->size; |
| 851 | pkt->hdr.control_flag = (u32)hdr->control_flag; |
| 852 | pkt->hdr.dst_node_id = (u32)hdr->dst_node_id; |
| 853 | pkt->hdr.dst_port_id = (u32)hdr->dst_port_id; |
| 854 | opt_len = hdr->opt_len; |
| 855 | skb_pull(skb, total_hdr_size); |
| 856 | if (opt_len > 0) { |
| 857 | opt_hdr_len = extract_optional_header(pkt, opt_len); |
| 858 | total_hdr_size += opt_hdr_len; |
| 859 | } |
| 860 | pkt->length -= total_hdr_size; |
| 861 | return 0; |
| 862 | } |
| 863 | |
| 864 | /** |
| 865 | * extract_header() - Extract IPC Router header |
| 866 | * @pkt: Packet from which the header has to be extraced. |
| 867 | * |
| 868 | * @return: 0 on success, standard Linux error codes on failure. |
| 869 | * |
| 870 | * This function will check if the header version is v1 or v2 and invoke |
| 871 | * the corresponding helper function to extract the IPC Router header. |
| 872 | */ |
| 873 | static int extract_header(struct rr_packet *pkt) |
| 874 | { |
| 875 | struct sk_buff *temp_skb; |
| 876 | int ret; |
| 877 | |
| 878 | if (!pkt) { |
| 879 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 880 | return -EINVAL; |
| 881 | } |
| 882 | |
| 883 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 884 | if (!temp_skb || !temp_skb->data) { |
| 885 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 886 | return -EINVAL; |
| 887 | } |
| 888 | |
| 889 | if (temp_skb->data[0] == IPC_ROUTER_V1) { |
| 890 | ret = extract_header_v1(pkt, temp_skb); |
| 891 | } else if (temp_skb->data[0] == IPC_ROUTER_V2) { |
| 892 | ret = extract_header_v2(pkt, temp_skb); |
| 893 | } else { |
| 894 | IPC_RTR_ERR("%s: Invalid Header version %02x\n", |
| 895 | __func__, temp_skb->data[0]); |
| 896 | print_hex_dump(KERN_ERR, "Header: ", DUMP_PREFIX_ADDRESS, |
| 897 | 16, 1, temp_skb->data, pkt->length, true); |
| 898 | return -EINVAL; |
| 899 | } |
| 900 | return ret; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * calc_tx_header_size() - Calculate header size to be reserved in SKB |
| 905 | * @pkt: Packet in which the space for header has to be reserved. |
| 906 | * @dst_xprt_info: XPRT through which the destination is reachable. |
| 907 | * |
| 908 | * @return: required header size on success, |
| 909 | * starndard Linux error codes on failure. |
| 910 | * |
| 911 | * This function is used to calculate the header size that has to be reserved |
| 912 | * in a transmit SKB. The header size is calculated based on the XPRT through |
| 913 | * which the destination node is reachable. |
| 914 | */ |
| 915 | static int calc_tx_header_size(struct rr_packet *pkt, |
| 916 | struct msm_ipc_router_xprt_info *dst_xprt_info) |
| 917 | { |
| 918 | int hdr_size = 0; |
| 919 | int xprt_version = 0; |
| 920 | struct msm_ipc_router_xprt_info *xprt_info = dst_xprt_info; |
| 921 | |
| 922 | if (!pkt) { |
| 923 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 924 | return -EINVAL; |
| 925 | } |
| 926 | |
| 927 | if (xprt_info) |
| 928 | xprt_version = xprt_info->xprt->get_version(xprt_info->xprt); |
| 929 | |
| 930 | if (xprt_version == IPC_ROUTER_V1) { |
| 931 | pkt->hdr.version = IPC_ROUTER_V1; |
| 932 | hdr_size = sizeof(struct rr_header_v1); |
| 933 | } else if (xprt_version == IPC_ROUTER_V2) { |
| 934 | pkt->hdr.version = IPC_ROUTER_V2; |
| 935 | hdr_size = sizeof(struct rr_header_v2) + pkt->opt_hdr.len; |
| 936 | } else { |
| 937 | IPC_RTR_ERR("%s: Invalid xprt_version %d\n", |
| 938 | __func__, xprt_version); |
| 939 | hdr_size = -EINVAL; |
| 940 | } |
| 941 | |
| 942 | return hdr_size; |
| 943 | } |
| 944 | |
| 945 | /** |
| 946 | * calc_rx_header_size() - Calculate the RX header size |
| 947 | * @xprt_info: XPRT info of the received message. |
| 948 | * |
| 949 | * @return: valid header size on success, INT_MAX on failure. |
| 950 | */ |
| 951 | static int calc_rx_header_size(struct msm_ipc_router_xprt_info *xprt_info) |
| 952 | { |
| 953 | int xprt_version = 0; |
| 954 | int hdr_size = INT_MAX; |
| 955 | |
| 956 | if (xprt_info) |
| 957 | xprt_version = xprt_info->xprt->get_version(xprt_info->xprt); |
| 958 | |
| 959 | if (xprt_version == IPC_ROUTER_V1) |
| 960 | hdr_size = sizeof(struct rr_header_v1); |
| 961 | else if (xprt_version == IPC_ROUTER_V2) |
| 962 | hdr_size = sizeof(struct rr_header_v2); |
| 963 | return hdr_size; |
| 964 | } |
| 965 | |
| 966 | /** |
| 967 | * prepend_header_v1() - Prepend IPC Router header of version 1 |
| 968 | * @pkt: Packet structure which contains the header info to be prepended. |
| 969 | * @hdr_size: Size of the header |
| 970 | * |
| 971 | * @return: 0 on success, standard Linux error codes on failure. |
| 972 | */ |
| 973 | static int prepend_header_v1(struct rr_packet *pkt, int hdr_size) |
| 974 | { |
| 975 | struct sk_buff *temp_skb; |
| 976 | struct rr_header_v1 *hdr; |
| 977 | |
| 978 | if (!pkt || hdr_size <= 0) { |
| 979 | IPC_RTR_ERR("%s: Invalid input parameters\n", __func__); |
| 980 | return -EINVAL; |
| 981 | } |
| 982 | |
| 983 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 984 | if (!temp_skb || !temp_skb->data) { |
| 985 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 986 | return -EINVAL; |
| 987 | } |
| 988 | |
| 989 | if (skb_headroom(temp_skb) < hdr_size) { |
| 990 | temp_skb = alloc_skb(hdr_size, GFP_KERNEL); |
| 991 | if (!temp_skb) { |
| 992 | IPC_RTR_ERR("%s: Could not allocate SKB of size %d\n", |
| 993 | __func__, hdr_size); |
| 994 | return -ENOMEM; |
| 995 | } |
| 996 | skb_reserve(temp_skb, hdr_size); |
| 997 | } |
| 998 | |
| 999 | hdr = (struct rr_header_v1 *)skb_push(temp_skb, hdr_size); |
| 1000 | memcpy(hdr, &pkt->hdr, hdr_size); |
| 1001 | if (temp_skb != skb_peek(pkt->pkt_fragment_q)) |
| 1002 | skb_queue_head(pkt->pkt_fragment_q, temp_skb); |
| 1003 | pkt->length += hdr_size; |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
| 1007 | /** |
| 1008 | * prepend_header_v2() - Prepend IPC Router header of version 2 |
| 1009 | * @pkt: Packet structure which contains the header info to be prepended. |
| 1010 | * @hdr_size: Size of the header |
| 1011 | * |
| 1012 | * @return: 0 on success, standard Linux error codes on failure. |
| 1013 | */ |
| 1014 | static int prepend_header_v2(struct rr_packet *pkt, int hdr_size) |
| 1015 | { |
| 1016 | struct sk_buff *temp_skb; |
| 1017 | struct rr_header_v2 *hdr; |
| 1018 | |
| 1019 | if (!pkt || hdr_size <= 0) { |
| 1020 | IPC_RTR_ERR("%s: Invalid input parameters\n", __func__); |
| 1021 | return -EINVAL; |
| 1022 | } |
| 1023 | |
| 1024 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 1025 | if (!temp_skb || !temp_skb->data) { |
| 1026 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 1027 | return -EINVAL; |
| 1028 | } |
| 1029 | |
| 1030 | if (skb_headroom(temp_skb) < hdr_size) { |
| 1031 | temp_skb = alloc_skb(hdr_size, GFP_KERNEL); |
| 1032 | if (!temp_skb) { |
| 1033 | IPC_RTR_ERR("%s: Could not allocate SKB of size %d\n", |
| 1034 | __func__, hdr_size); |
| 1035 | return -ENOMEM; |
| 1036 | } |
| 1037 | skb_reserve(temp_skb, hdr_size); |
| 1038 | } |
| 1039 | |
| 1040 | hdr = (struct rr_header_v2 *)skb_push(temp_skb, hdr_size); |
| 1041 | hdr->version = (u8)pkt->hdr.version; |
| 1042 | hdr->type = (u8)pkt->hdr.type; |
| 1043 | hdr->control_flag = (u8)pkt->hdr.control_flag; |
| 1044 | hdr->size = (u32)pkt->hdr.size; |
| 1045 | hdr->src_node_id = (u16)pkt->hdr.src_node_id; |
| 1046 | hdr->src_port_id = (u16)pkt->hdr.src_port_id; |
| 1047 | hdr->dst_node_id = (u16)pkt->hdr.dst_node_id; |
| 1048 | hdr->dst_port_id = (u16)pkt->hdr.dst_port_id; |
| 1049 | if (pkt->opt_hdr.len > 0) { |
| 1050 | hdr->opt_len = pkt->opt_hdr.len / IPCR_WORD_SIZE; |
| 1051 | memcpy(hdr + sizeof(*hdr), pkt->opt_hdr.data, pkt->opt_hdr.len); |
| 1052 | } else { |
| 1053 | hdr->opt_len = 0; |
| 1054 | } |
| 1055 | if (temp_skb != skb_peek(pkt->pkt_fragment_q)) |
| 1056 | skb_queue_head(pkt->pkt_fragment_q, temp_skb); |
| 1057 | pkt->length += hdr_size; |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | /** |
| 1062 | * prepend_header() - Prepend IPC Router header |
| 1063 | * @pkt: Packet structure which contains the header info to be prepended. |
| 1064 | * @xprt_info: XPRT through which the packet is transmitted. |
| 1065 | * |
| 1066 | * @return: 0 on success, standard Linux error codes on failure. |
| 1067 | * |
| 1068 | * This function prepends the header to the packet to be transmitted. The |
| 1069 | * IPC Router header version to be prepended depends on the XPRT through |
| 1070 | * which the destination is reachable. |
| 1071 | */ |
| 1072 | static int prepend_header(struct rr_packet *pkt, |
| 1073 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1074 | { |
| 1075 | int hdr_size; |
| 1076 | struct sk_buff *temp_skb; |
| 1077 | |
| 1078 | if (!pkt) { |
| 1079 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 1080 | return -EINVAL; |
| 1081 | } |
| 1082 | |
| 1083 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 1084 | if (!temp_skb || !temp_skb->data) { |
| 1085 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 1086 | return -EINVAL; |
| 1087 | } |
| 1088 | |
| 1089 | hdr_size = calc_tx_header_size(pkt, xprt_info); |
| 1090 | if (hdr_size <= 0) |
| 1091 | return hdr_size; |
| 1092 | |
| 1093 | if (pkt->hdr.version == IPC_ROUTER_V1) |
| 1094 | return prepend_header_v1(pkt, hdr_size); |
| 1095 | else if (pkt->hdr.version == IPC_ROUTER_V2) |
| 1096 | return prepend_header_v2(pkt, hdr_size); |
| 1097 | else |
| 1098 | return -EINVAL; |
| 1099 | } |
| 1100 | |
| 1101 | /** |
| 1102 | * defragment_pkt() - Defragment and linearize the packet |
| 1103 | * @pkt: Packet to be linearized. |
| 1104 | * |
| 1105 | * @return: 0 on success, standard Linux error codes on failure. |
| 1106 | * |
| 1107 | * Some packets contain fragments of data over multiple SKBs. If an XPRT |
| 1108 | * does not supported fragmented writes, linearize multiple SKBs into one |
| 1109 | * single SKB. |
| 1110 | */ |
| 1111 | static int defragment_pkt(struct rr_packet *pkt) |
| 1112 | { |
| 1113 | struct sk_buff *dst_skb, *src_skb, *temp_skb; |
| 1114 | int offset = 0, buf_len = 0, copy_len; |
| 1115 | void *buf; |
| 1116 | int align_size; |
| 1117 | |
| 1118 | if (!pkt || pkt->length <= 0) { |
| 1119 | IPC_RTR_ERR("%s: Invalid PKT\n", __func__); |
| 1120 | return -EINVAL; |
| 1121 | } |
| 1122 | |
| 1123 | if (skb_queue_len(pkt->pkt_fragment_q) == 1) |
| 1124 | return 0; |
| 1125 | |
| 1126 | align_size = ALIGN_SIZE(pkt->length); |
| 1127 | dst_skb = alloc_skb(pkt->length + align_size, GFP_KERNEL); |
| 1128 | if (!dst_skb) { |
| 1129 | IPC_RTR_ERR("%s: could not allocate one skb of size %d\n", |
| 1130 | __func__, pkt->length); |
| 1131 | return -ENOMEM; |
| 1132 | } |
| 1133 | buf = skb_put(dst_skb, pkt->length); |
| 1134 | buf_len = pkt->length; |
| 1135 | |
| 1136 | skb_queue_walk(pkt->pkt_fragment_q, src_skb) { |
| 1137 | copy_len = buf_len < src_skb->len ? buf_len : src_skb->len; |
| 1138 | memcpy(buf + offset, src_skb->data, copy_len); |
| 1139 | offset += copy_len; |
| 1140 | buf_len -= copy_len; |
| 1141 | } |
| 1142 | |
| 1143 | while (!skb_queue_empty(pkt->pkt_fragment_q)) { |
| 1144 | temp_skb = skb_dequeue(pkt->pkt_fragment_q); |
| 1145 | kfree_skb(temp_skb); |
| 1146 | } |
| 1147 | skb_queue_tail(pkt->pkt_fragment_q, dst_skb); |
| 1148 | return 0; |
| 1149 | } |
| 1150 | |
| 1151 | static int post_pkt_to_port(struct msm_ipc_port *port_ptr, |
| 1152 | struct rr_packet *pkt, int clone) |
| 1153 | { |
| 1154 | struct rr_packet *temp_pkt = pkt; |
| 1155 | void (*notify)(unsigned int event, void *oob_data, |
| 1156 | size_t oob_data_len, void *priv); |
| 1157 | void (*data_ready)(struct sock *sk) = NULL; |
| 1158 | struct sock *sk; |
| 1159 | u32 pkt_type; |
| 1160 | |
| 1161 | if (unlikely(!port_ptr || !pkt)) |
| 1162 | return -EINVAL; |
| 1163 | |
| 1164 | if (clone) { |
| 1165 | temp_pkt = clone_pkt(pkt); |
| 1166 | if (!temp_pkt) { |
| 1167 | IPC_RTR_ERR( |
| 1168 | "%s: Error cloning packet for port %08x:%08x\n", |
| 1169 | __func__, port_ptr->this_port.node_id, |
| 1170 | port_ptr->this_port.port_id); |
| 1171 | return -ENOMEM; |
| 1172 | } |
| 1173 | } |
| 1174 | |
| 1175 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 1176 | if (pkt->ws_need) |
| 1177 | __pm_stay_awake(port_ptr->port_rx_ws); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1178 | list_add_tail(&temp_pkt->list, &port_ptr->port_rx_q); |
| 1179 | wake_up(&port_ptr->port_rx_wait_q); |
| 1180 | notify = port_ptr->notify; |
| 1181 | pkt_type = temp_pkt->hdr.type; |
| 1182 | sk = (struct sock *)port_ptr->endpoint; |
| 1183 | if (sk) { |
| 1184 | read_lock(&sk->sk_callback_lock); |
| 1185 | data_ready = sk->sk_data_ready; |
| 1186 | read_unlock(&sk->sk_callback_lock); |
| 1187 | } |
| 1188 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 1189 | if (notify) |
| 1190 | notify(pkt_type, NULL, 0, port_ptr->priv); |
| 1191 | else if (sk && data_ready) |
| 1192 | data_ready(sk); |
| 1193 | |
| 1194 | return 0; |
| 1195 | } |
| 1196 | |
| 1197 | /** |
| 1198 | * ipc_router_peek_pkt_size() - Peek into the packet header to get potential |
| 1199 | * packet size |
| 1200 | * @data: Starting address of the packet which points to router header. |
| 1201 | * |
| 1202 | * @returns: potential packet size on success, < 0 on error. |
| 1203 | * |
| 1204 | * This function is used by the underlying transport abstraction layer to |
| 1205 | * peek into the potential packet size of an incoming packet. This information |
| 1206 | * is used to perform link layer fragmentation and re-assembly |
| 1207 | */ |
| 1208 | int ipc_router_peek_pkt_size(char *data) |
| 1209 | { |
| 1210 | int size; |
| 1211 | |
| 1212 | if (!data) { |
| 1213 | pr_err("%s: NULL PKT\n", __func__); |
| 1214 | return -EINVAL; |
| 1215 | } |
| 1216 | |
| 1217 | if (data[0] == IPC_ROUTER_V1) |
| 1218 | size = ((struct rr_header_v1 *)data)->size + |
| 1219 | sizeof(struct rr_header_v1); |
| 1220 | else if (data[0] == IPC_ROUTER_V2) |
| 1221 | size = ((struct rr_header_v2 *)data)->size + |
| 1222 | ((struct rr_header_v2 *)data)->opt_len * IPCR_WORD_SIZE |
| 1223 | + sizeof(struct rr_header_v2); |
| 1224 | else |
| 1225 | return -EINVAL; |
| 1226 | |
| 1227 | size += ALIGN_SIZE(size); |
| 1228 | return size; |
| 1229 | } |
| 1230 | |
| 1231 | static int post_control_ports(struct rr_packet *pkt) |
| 1232 | { |
| 1233 | struct msm_ipc_port *port_ptr; |
| 1234 | |
| 1235 | if (!pkt) |
| 1236 | return -EINVAL; |
| 1237 | |
| 1238 | down_read(&control_ports_lock_lha5); |
| 1239 | list_for_each_entry(port_ptr, &control_ports, list) |
| 1240 | post_pkt_to_port(port_ptr, pkt, 1); |
| 1241 | up_read(&control_ports_lock_lha5); |
| 1242 | return 0; |
| 1243 | } |
| 1244 | |
| 1245 | static u32 allocate_port_id(void) |
| 1246 | { |
| 1247 | u32 port_id = 0, prev_port_id, key; |
| 1248 | struct msm_ipc_port *port_ptr; |
| 1249 | |
| 1250 | mutex_lock(&next_port_id_lock_lhc1); |
| 1251 | prev_port_id = next_port_id; |
| 1252 | down_read(&local_ports_lock_lhc2); |
| 1253 | do { |
| 1254 | next_port_id++; |
| 1255 | if ((next_port_id & IPC_ROUTER_ADDRESS) == IPC_ROUTER_ADDRESS) |
| 1256 | next_port_id = 1; |
| 1257 | |
| 1258 | key = (next_port_id & (LP_HASH_SIZE - 1)); |
| 1259 | if (list_empty(&local_ports[key])) { |
| 1260 | port_id = next_port_id; |
| 1261 | break; |
| 1262 | } |
| 1263 | list_for_each_entry(port_ptr, &local_ports[key], list) { |
| 1264 | if (port_ptr->this_port.port_id == next_port_id) { |
| 1265 | port_id = next_port_id; |
| 1266 | break; |
| 1267 | } |
| 1268 | } |
| 1269 | if (!port_id) { |
| 1270 | port_id = next_port_id; |
| 1271 | break; |
| 1272 | } |
| 1273 | port_id = 0; |
| 1274 | } while (next_port_id != prev_port_id); |
| 1275 | up_read(&local_ports_lock_lhc2); |
| 1276 | mutex_unlock(&next_port_id_lock_lhc1); |
| 1277 | |
| 1278 | return port_id; |
| 1279 | } |
| 1280 | |
| 1281 | void msm_ipc_router_add_local_port(struct msm_ipc_port *port_ptr) |
| 1282 | { |
| 1283 | u32 key; |
| 1284 | |
| 1285 | if (!port_ptr) |
| 1286 | return; |
| 1287 | |
| 1288 | key = (port_ptr->this_port.port_id & (LP_HASH_SIZE - 1)); |
| 1289 | down_write(&local_ports_lock_lhc2); |
| 1290 | list_add_tail(&port_ptr->list, &local_ports[key]); |
| 1291 | up_write(&local_ports_lock_lhc2); |
| 1292 | } |
| 1293 | |
| 1294 | /** |
| 1295 | * msm_ipc_router_create_raw_port() - Create an IPC Router port |
| 1296 | * @endpoint: User-space space socket information to be cached. |
| 1297 | * @notify: Function to notify incoming events on the port. |
| 1298 | * @event: Event ID to be handled. |
| 1299 | * @oob_data: Any out-of-band data associated with the event. |
| 1300 | * @oob_data_len: Size of the out-of-band data, if valid. |
| 1301 | * @priv: Private data registered during the port creation. |
| 1302 | * @priv: Private Data to be passed during the event notification. |
| 1303 | * |
| 1304 | * @return: Valid pointer to port on success, NULL on failure. |
| 1305 | * |
| 1306 | * This function is used to create an IPC Router port. The port is used for |
| 1307 | * communication locally or outside the subsystem. |
| 1308 | */ |
| 1309 | struct msm_ipc_port * |
| 1310 | msm_ipc_router_create_raw_port(void *endpoint, |
| 1311 | void (*notify)(unsigned int event, |
| 1312 | void *oob_data, |
| 1313 | size_t oob_data_len, void *priv), |
| 1314 | void *priv) |
| 1315 | { |
| 1316 | struct msm_ipc_port *port_ptr; |
| 1317 | |
| 1318 | port_ptr = kzalloc(sizeof(*port_ptr), GFP_KERNEL); |
| 1319 | if (!port_ptr) |
| 1320 | return NULL; |
| 1321 | |
| 1322 | port_ptr->this_port.node_id = IPC_ROUTER_NID_LOCAL; |
| 1323 | port_ptr->this_port.port_id = allocate_port_id(); |
| 1324 | if (!port_ptr->this_port.port_id) { |
| 1325 | IPC_RTR_ERR("%s: All port ids are in use\n", __func__); |
| 1326 | kfree(port_ptr); |
| 1327 | return NULL; |
| 1328 | } |
| 1329 | |
| 1330 | mutex_init(&port_ptr->port_lock_lhc3); |
| 1331 | INIT_LIST_HEAD(&port_ptr->port_rx_q); |
| 1332 | mutex_init(&port_ptr->port_rx_q_lock_lhc3); |
| 1333 | init_waitqueue_head(&port_ptr->port_rx_wait_q); |
| 1334 | snprintf(port_ptr->rx_ws_name, MAX_WS_NAME_SZ, |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame^] | 1335 | "ipc%08x_%d_%s", |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1336 | port_ptr->this_port.port_id, |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame^] | 1337 | task_pid_nr(current), |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1338 | current->comm); |
| 1339 | port_ptr->port_rx_ws = wakeup_source_register(port_ptr->rx_ws_name); |
| 1340 | if (!port_ptr->port_rx_ws) { |
| 1341 | kfree(port_ptr); |
| 1342 | return NULL; |
| 1343 | } |
| 1344 | init_waitqueue_head(&port_ptr->port_tx_wait_q); |
| 1345 | kref_init(&port_ptr->ref); |
| 1346 | |
| 1347 | port_ptr->endpoint = endpoint; |
| 1348 | port_ptr->notify = notify; |
| 1349 | port_ptr->priv = priv; |
| 1350 | |
| 1351 | msm_ipc_router_add_local_port(port_ptr); |
| 1352 | if (endpoint) |
| 1353 | sock_hold(ipc_port_sk(endpoint)); |
| 1354 | return port_ptr; |
| 1355 | } |
| 1356 | |
| 1357 | /** |
| 1358 | * ipc_router_get_port_ref() - Get a reference to the local port |
| 1359 | * @port_id: Port ID of the local port for which reference is get. |
| 1360 | * |
| 1361 | * @return: If port is found, a reference to the port is returned. |
| 1362 | * Else NULL is returned. |
| 1363 | */ |
| 1364 | static struct msm_ipc_port *ipc_router_get_port_ref(u32 port_id) |
| 1365 | { |
| 1366 | int key = (port_id & (LP_HASH_SIZE - 1)); |
| 1367 | struct msm_ipc_port *port_ptr; |
| 1368 | |
| 1369 | down_read(&local_ports_lock_lhc2); |
| 1370 | list_for_each_entry(port_ptr, &local_ports[key], list) { |
| 1371 | if (port_ptr->this_port.port_id == port_id) { |
| 1372 | kref_get(&port_ptr->ref); |
| 1373 | up_read(&local_ports_lock_lhc2); |
| 1374 | return port_ptr; |
| 1375 | } |
| 1376 | } |
| 1377 | up_read(&local_ports_lock_lhc2); |
| 1378 | return NULL; |
| 1379 | } |
| 1380 | |
| 1381 | /** |
| 1382 | * ipc_router_release_port() - Cleanup and release the port |
| 1383 | * @ref: Reference to the port. |
| 1384 | * |
| 1385 | * This function is called when all references to the port are released. |
| 1386 | */ |
| 1387 | void ipc_router_release_port(struct kref *ref) |
| 1388 | { |
| 1389 | struct rr_packet *pkt, *temp_pkt; |
| 1390 | struct msm_ipc_port *port_ptr = |
| 1391 | container_of(ref, struct msm_ipc_port, ref); |
| 1392 | |
| 1393 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 1394 | list_for_each_entry_safe(pkt, temp_pkt, &port_ptr->port_rx_q, list) { |
| 1395 | list_del(&pkt->list); |
| 1396 | release_pkt(pkt); |
| 1397 | } |
| 1398 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 1399 | wakeup_source_unregister(port_ptr->port_rx_ws); |
| 1400 | if (port_ptr->endpoint) |
| 1401 | sock_put(ipc_port_sk(port_ptr->endpoint)); |
| 1402 | kfree(port_ptr); |
| 1403 | } |
| 1404 | |
| 1405 | /** |
| 1406 | * ipc_router_get_rport_ref()- Get reference to the remote port |
| 1407 | * @node_id: Node ID corresponding to the remote port. |
| 1408 | * @port_id: Port ID corresponding to the remote port. |
| 1409 | * |
| 1410 | * @return: a reference to the remote port on success, NULL on failure. |
| 1411 | */ |
| 1412 | static struct msm_ipc_router_remote_port *ipc_router_get_rport_ref( |
| 1413 | u32 node_id, u32 port_id) |
| 1414 | { |
| 1415 | struct msm_ipc_router_remote_port *rport_ptr; |
| 1416 | struct msm_ipc_routing_table_entry *rt_entry; |
| 1417 | int key = (port_id & (RP_HASH_SIZE - 1)); |
| 1418 | |
| 1419 | rt_entry = ipc_router_get_rtentry_ref(node_id); |
| 1420 | if (!rt_entry) { |
| 1421 | IPC_RTR_ERR("%s: Node is not up\n", __func__); |
| 1422 | return NULL; |
| 1423 | } |
| 1424 | |
| 1425 | down_read(&rt_entry->lock_lha4); |
| 1426 | list_for_each_entry(rport_ptr, |
| 1427 | &rt_entry->remote_port_list[key], list) { |
| 1428 | if (rport_ptr->port_id == port_id) { |
| 1429 | kref_get(&rport_ptr->ref); |
| 1430 | goto out_lookup_rmt_port1; |
| 1431 | } |
| 1432 | } |
| 1433 | rport_ptr = NULL; |
| 1434 | out_lookup_rmt_port1: |
| 1435 | up_read(&rt_entry->lock_lha4); |
| 1436 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 1437 | return rport_ptr; |
| 1438 | } |
| 1439 | |
| 1440 | /** |
| 1441 | * ipc_router_create_rport() - Create a remote port |
| 1442 | * @node_id: Node ID corresponding to the remote port. |
| 1443 | * @port_id: Port ID corresponding to the remote port. |
| 1444 | * @xprt_info: XPRT through which the concerned node is reachable. |
| 1445 | * |
| 1446 | * @return: a reference to the remote port on success, NULL on failure. |
| 1447 | */ |
| 1448 | static struct msm_ipc_router_remote_port *ipc_router_create_rport( |
| 1449 | u32 node_id, u32 port_id, |
| 1450 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1451 | { |
| 1452 | struct msm_ipc_router_remote_port *rport_ptr; |
| 1453 | struct msm_ipc_routing_table_entry *rt_entry; |
| 1454 | int key = (port_id & (RP_HASH_SIZE - 1)); |
| 1455 | |
| 1456 | rt_entry = create_routing_table_entry(node_id, xprt_info); |
| 1457 | if (!rt_entry) { |
| 1458 | IPC_RTR_ERR("%s: Node cannot be created\n", __func__); |
| 1459 | return NULL; |
| 1460 | } |
| 1461 | |
| 1462 | down_write(&rt_entry->lock_lha4); |
| 1463 | list_for_each_entry(rport_ptr, |
| 1464 | &rt_entry->remote_port_list[key], list) { |
| 1465 | if (rport_ptr->port_id == port_id) |
| 1466 | goto out_create_rmt_port1; |
| 1467 | } |
| 1468 | |
| 1469 | rport_ptr = kmalloc(sizeof(*rport_ptr), GFP_KERNEL); |
| 1470 | if (!rport_ptr) { |
| 1471 | IPC_RTR_ERR("%s: Remote port alloc failed\n", __func__); |
| 1472 | goto out_create_rmt_port2; |
| 1473 | } |
| 1474 | rport_ptr->port_id = port_id; |
| 1475 | rport_ptr->node_id = node_id; |
| 1476 | rport_ptr->status = VALID; |
| 1477 | rport_ptr->sec_rule = NULL; |
| 1478 | rport_ptr->server = NULL; |
| 1479 | rport_ptr->tx_quota_cnt = 0; |
| 1480 | kref_init(&rport_ptr->ref); |
| 1481 | mutex_init(&rport_ptr->rport_lock_lhb2); |
| 1482 | INIT_LIST_HEAD(&rport_ptr->resume_tx_port_list); |
| 1483 | INIT_LIST_HEAD(&rport_ptr->conn_info_list); |
| 1484 | list_add_tail(&rport_ptr->list, |
| 1485 | &rt_entry->remote_port_list[key]); |
| 1486 | out_create_rmt_port1: |
| 1487 | kref_get(&rport_ptr->ref); |
| 1488 | out_create_rmt_port2: |
| 1489 | up_write(&rt_entry->lock_lha4); |
| 1490 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 1491 | return rport_ptr; |
| 1492 | } |
| 1493 | |
| 1494 | /** |
| 1495 | * msm_ipc_router_free_resume_tx_port() - Free the resume_tx ports |
| 1496 | * @rport_ptr: Pointer to the remote port. |
| 1497 | * |
| 1498 | * This function deletes all the resume_tx ports associated with a remote port |
| 1499 | * and frees the memory allocated to each resume_tx port. |
| 1500 | * |
| 1501 | * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| 1502 | */ |
| 1503 | static void msm_ipc_router_free_resume_tx_port( |
| 1504 | struct msm_ipc_router_remote_port *rport_ptr) |
| 1505 | { |
| 1506 | struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| 1507 | |
| 1508 | list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| 1509 | &rport_ptr->resume_tx_port_list, list) { |
| 1510 | list_del(&rtx_port->list); |
| 1511 | kfree(rtx_port); |
| 1512 | } |
| 1513 | } |
| 1514 | |
| 1515 | /** |
| 1516 | * msm_ipc_router_lookup_resume_tx_port() - Lookup resume_tx port list |
| 1517 | * @rport_ptr: Remote port whose resume_tx port list needs to be looked. |
| 1518 | * @port_id: Port ID which needs to be looked from the list. |
| 1519 | * |
| 1520 | * return 1 if the port_id is found in the list, else 0. |
| 1521 | * |
| 1522 | * This function is used to lookup the existence of a local port in |
| 1523 | * remote port's resume_tx list. This function is used to ensure that |
| 1524 | * the same port is not added to the remote_port's resume_tx list repeatedly. |
| 1525 | * |
| 1526 | * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| 1527 | */ |
| 1528 | static int msm_ipc_router_lookup_resume_tx_port( |
| 1529 | struct msm_ipc_router_remote_port *rport_ptr, u32 port_id) |
| 1530 | { |
| 1531 | struct msm_ipc_resume_tx_port *rtx_port; |
| 1532 | |
| 1533 | list_for_each_entry(rtx_port, &rport_ptr->resume_tx_port_list, list) { |
| 1534 | if (port_id == rtx_port->port_id) |
| 1535 | return 1; |
| 1536 | } |
| 1537 | return 0; |
| 1538 | } |
| 1539 | |
| 1540 | /** |
| 1541 | * ipc_router_dummy_write_space() - Dummy write space available callback |
| 1542 | * @sk: Socket pointer for which the callback is called. |
| 1543 | */ |
| 1544 | void ipc_router_dummy_write_space(struct sock *sk) |
| 1545 | { |
| 1546 | } |
| 1547 | |
| 1548 | /** |
| 1549 | * post_resume_tx() - Post the resume_tx event |
| 1550 | * @rport_ptr: Pointer to the remote port |
| 1551 | * @pkt : The data packet that is received on a resume_tx event |
| 1552 | * @msg: Out of band data to be passed to kernel drivers |
| 1553 | * |
| 1554 | * This function informs about the reception of the resume_tx message from a |
| 1555 | * remote port pointed by rport_ptr to all the local ports that are in the |
| 1556 | * resume_tx_ports_list of this remote port. On posting the information, this |
| 1557 | * function sequentially deletes each entry in the resume_tx_port_list of the |
| 1558 | * remote port. |
| 1559 | * |
| 1560 | * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| 1561 | */ |
| 1562 | static void post_resume_tx(struct msm_ipc_router_remote_port *rport_ptr, |
| 1563 | struct rr_packet *pkt, union rr_control_msg *msg) |
| 1564 | { |
| 1565 | struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| 1566 | struct msm_ipc_port *local_port; |
| 1567 | struct sock *sk; |
| 1568 | void (*write_space)(struct sock *sk) = NULL; |
| 1569 | |
| 1570 | list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| 1571 | &rport_ptr->resume_tx_port_list, list) { |
| 1572 | local_port = ipc_router_get_port_ref(rtx_port->port_id); |
| 1573 | if (local_port && local_port->notify) { |
| 1574 | wake_up(&local_port->port_tx_wait_q); |
| 1575 | local_port->notify(IPC_ROUTER_CTRL_CMD_RESUME_TX, msg, |
| 1576 | sizeof(*msg), local_port->priv); |
| 1577 | } else if (local_port) { |
| 1578 | wake_up(&local_port->port_tx_wait_q); |
| 1579 | sk = ipc_port_sk(local_port->endpoint); |
| 1580 | if (sk) { |
| 1581 | read_lock(&sk->sk_callback_lock); |
| 1582 | write_space = sk->sk_write_space; |
| 1583 | read_unlock(&sk->sk_callback_lock); |
| 1584 | } |
| 1585 | if (write_space && |
| 1586 | write_space != ipc_router_dummy_write_space) |
| 1587 | write_space(sk); |
| 1588 | else |
| 1589 | post_pkt_to_port(local_port, pkt, 1); |
| 1590 | } else { |
| 1591 | IPC_RTR_ERR("%s: Local Port %d not Found", |
| 1592 | __func__, rtx_port->port_id); |
| 1593 | } |
| 1594 | if (local_port) |
| 1595 | kref_put(&local_port->ref, ipc_router_release_port); |
| 1596 | list_del(&rtx_port->list); |
| 1597 | kfree(rtx_port); |
| 1598 | } |
| 1599 | } |
| 1600 | |
| 1601 | /** |
| 1602 | * signal_rport_exit() - Signal the local ports of remote port exit |
| 1603 | * @rport_ptr: Remote port that is exiting. |
| 1604 | * |
| 1605 | * This function is used to signal the local ports that are waiting |
| 1606 | * to resume transmission to a remote port that is exiting. |
| 1607 | */ |
| 1608 | static void signal_rport_exit(struct msm_ipc_router_remote_port *rport_ptr) |
| 1609 | { |
| 1610 | struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| 1611 | struct msm_ipc_port *local_port; |
| 1612 | |
| 1613 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 1614 | rport_ptr->status = RESET; |
| 1615 | list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| 1616 | &rport_ptr->resume_tx_port_list, list) { |
| 1617 | local_port = ipc_router_get_port_ref(rtx_port->port_id); |
| 1618 | if (local_port) { |
| 1619 | wake_up(&local_port->port_tx_wait_q); |
| 1620 | kref_put(&local_port->ref, ipc_router_release_port); |
| 1621 | } |
| 1622 | list_del(&rtx_port->list); |
| 1623 | kfree(rtx_port); |
| 1624 | } |
| 1625 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 1626 | } |
| 1627 | |
| 1628 | /** |
| 1629 | * ipc_router_release_rport() - Cleanup and release the remote port |
| 1630 | * @ref: Reference to the remote port. |
| 1631 | * |
| 1632 | * This function is called when all references to the remote port are released. |
| 1633 | */ |
| 1634 | static void ipc_router_release_rport(struct kref *ref) |
| 1635 | { |
| 1636 | struct msm_ipc_router_remote_port *rport_ptr = |
| 1637 | container_of(ref, struct msm_ipc_router_remote_port, ref); |
| 1638 | |
| 1639 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 1640 | msm_ipc_router_free_resume_tx_port(rport_ptr); |
| 1641 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 1642 | kfree(rport_ptr); |
| 1643 | } |
| 1644 | |
| 1645 | /** |
| 1646 | * ipc_router_destroy_rport() - Destroy the remote port |
| 1647 | * @rport_ptr: Pointer to the remote port to be destroyed. |
| 1648 | */ |
| 1649 | static void ipc_router_destroy_rport( |
| 1650 | struct msm_ipc_router_remote_port *rport_ptr) |
| 1651 | { |
| 1652 | u32 node_id; |
| 1653 | struct msm_ipc_routing_table_entry *rt_entry; |
| 1654 | |
| 1655 | if (!rport_ptr) |
| 1656 | return; |
| 1657 | |
| 1658 | node_id = rport_ptr->node_id; |
| 1659 | rt_entry = ipc_router_get_rtentry_ref(node_id); |
| 1660 | if (!rt_entry) { |
| 1661 | IPC_RTR_ERR("%s: Node %d is not up\n", __func__, node_id); |
| 1662 | return; |
| 1663 | } |
| 1664 | down_write(&rt_entry->lock_lha4); |
| 1665 | list_del(&rport_ptr->list); |
| 1666 | up_write(&rt_entry->lock_lha4); |
| 1667 | signal_rport_exit(rport_ptr); |
| 1668 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 1669 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 1670 | } |
| 1671 | |
| 1672 | /** |
| 1673 | * msm_ipc_router_lookup_server() - Lookup server information |
| 1674 | * @service: Service ID of the server info to be looked up. |
| 1675 | * @instance: Instance ID of the server info to be looked up. |
| 1676 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1677 | * @port_id: Port ID within the node in which the server is hosted. |
| 1678 | * |
| 1679 | * @return: If found Pointer to server structure, else NULL. |
| 1680 | * |
| 1681 | * Note1: Lock the server_list_lock_lha2 before accessing this function. |
| 1682 | * Note2: If the <node_id:port_id> are <0:0>, then the lookup is restricted |
| 1683 | * to <service:instance>. Used only when a client wants to send a |
| 1684 | * message to any QMI server. |
| 1685 | */ |
| 1686 | static struct msm_ipc_server *msm_ipc_router_lookup_server( |
| 1687 | u32 service, |
| 1688 | u32 instance, |
| 1689 | u32 node_id, |
| 1690 | u32 port_id) |
| 1691 | { |
| 1692 | struct msm_ipc_server *server; |
| 1693 | struct msm_ipc_server_port *server_port; |
| 1694 | int key = (service & (SRV_HASH_SIZE - 1)); |
| 1695 | |
| 1696 | list_for_each_entry(server, &server_list[key], list) { |
| 1697 | if ((server->name.service != service) || |
| 1698 | (server->name.instance != instance)) |
| 1699 | continue; |
| 1700 | if ((node_id == 0) && (port_id == 0)) |
| 1701 | return server; |
| 1702 | list_for_each_entry(server_port, &server->server_port_list, |
| 1703 | list) { |
| 1704 | if ((server_port->server_addr.node_id == node_id) && |
| 1705 | (server_port->server_addr.port_id == port_id)) |
| 1706 | return server; |
| 1707 | } |
| 1708 | } |
| 1709 | return NULL; |
| 1710 | } |
| 1711 | |
| 1712 | /** |
| 1713 | * ipc_router_get_server_ref() - Get reference to the server |
| 1714 | * @svc: Service ID for which the reference is required. |
| 1715 | * @ins: Instance ID for which the reference is required. |
| 1716 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1717 | * @port_id: Port ID within the node in which the server is hosted. |
| 1718 | * |
| 1719 | * @return: If found return reference to server, else NULL. |
| 1720 | */ |
| 1721 | static struct msm_ipc_server *ipc_router_get_server_ref( |
| 1722 | u32 svc, u32 ins, u32 node_id, u32 port_id) |
| 1723 | { |
| 1724 | struct msm_ipc_server *server; |
| 1725 | |
| 1726 | down_read(&server_list_lock_lha2); |
| 1727 | server = msm_ipc_router_lookup_server(svc, ins, node_id, port_id); |
| 1728 | if (server) |
| 1729 | kref_get(&server->ref); |
| 1730 | up_read(&server_list_lock_lha2); |
| 1731 | return server; |
| 1732 | } |
| 1733 | |
| 1734 | /** |
| 1735 | * ipc_router_release_server() - Cleanup and release the server |
| 1736 | * @ref: Reference to the server. |
| 1737 | * |
| 1738 | * This function is called when all references to the server are released. |
| 1739 | */ |
| 1740 | static void ipc_router_release_server(struct kref *ref) |
| 1741 | { |
| 1742 | struct msm_ipc_server *server = |
| 1743 | container_of(ref, struct msm_ipc_server, ref); |
| 1744 | |
| 1745 | kfree(server); |
| 1746 | } |
| 1747 | |
| 1748 | /** |
| 1749 | * msm_ipc_router_create_server() - Add server info to hash table |
| 1750 | * @service: Service ID of the server info to be created. |
| 1751 | * @instance: Instance ID of the server info to be created. |
| 1752 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1753 | * @port_id: Port ID within the node in which the server is hosted. |
| 1754 | * @xprt_info: XPRT through which the node hosting the server is reached. |
| 1755 | * |
| 1756 | * @return: Pointer to server structure on success, else NULL. |
| 1757 | * |
| 1758 | * This function adds the server info to the hash table. If the same |
| 1759 | * server(i.e. <service_id:instance_id>) is hosted in different nodes, |
| 1760 | * they are maintained as list of "server_port" under "server" structure. |
| 1761 | */ |
| 1762 | static struct msm_ipc_server *msm_ipc_router_create_server( |
| 1763 | u32 service, |
| 1764 | u32 instance, |
| 1765 | u32 node_id, |
| 1766 | u32 port_id, |
| 1767 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1768 | { |
| 1769 | struct msm_ipc_server *server = NULL; |
| 1770 | struct msm_ipc_server_port *server_port; |
| 1771 | struct platform_device *pdev; |
| 1772 | int key = (service & (SRV_HASH_SIZE - 1)); |
| 1773 | |
| 1774 | down_write(&server_list_lock_lha2); |
| 1775 | server = msm_ipc_router_lookup_server(service, instance, 0, 0); |
| 1776 | if (server) { |
| 1777 | list_for_each_entry(server_port, &server->server_port_list, |
| 1778 | list) { |
| 1779 | if ((server_port->server_addr.node_id == node_id) && |
| 1780 | (server_port->server_addr.port_id == port_id)) |
| 1781 | goto return_server; |
| 1782 | } |
| 1783 | goto create_srv_port; |
| 1784 | } |
| 1785 | |
| 1786 | server = kzalloc(sizeof(*server), GFP_KERNEL); |
| 1787 | if (!server) { |
| 1788 | up_write(&server_list_lock_lha2); |
| 1789 | IPC_RTR_ERR("%s: Server allocation failed\n", __func__); |
| 1790 | return NULL; |
| 1791 | } |
| 1792 | server->name.service = service; |
| 1793 | server->name.instance = instance; |
| 1794 | server->synced_sec_rule = 0; |
| 1795 | INIT_LIST_HEAD(&server->server_port_list); |
| 1796 | kref_init(&server->ref); |
| 1797 | list_add_tail(&server->list, &server_list[key]); |
| 1798 | scnprintf(server->pdev_name, sizeof(server->pdev_name), |
| 1799 | "SVC%08x:%08x", service, instance); |
| 1800 | server->next_pdev_id = 1; |
| 1801 | |
| 1802 | create_srv_port: |
| 1803 | server_port = kzalloc(sizeof(*server_port), GFP_KERNEL); |
| 1804 | pdev = platform_device_alloc(server->pdev_name, server->next_pdev_id); |
| 1805 | if (!server_port || !pdev) { |
| 1806 | kfree(server_port); |
| 1807 | if (pdev) |
| 1808 | platform_device_put(pdev); |
| 1809 | if (list_empty(&server->server_port_list)) { |
| 1810 | list_del(&server->list); |
| 1811 | kfree(server); |
| 1812 | } |
| 1813 | up_write(&server_list_lock_lha2); |
| 1814 | IPC_RTR_ERR("%s: Server Port allocation failed\n", __func__); |
| 1815 | return NULL; |
| 1816 | } |
| 1817 | server_port->pdev = pdev; |
| 1818 | server_port->server_addr.node_id = node_id; |
| 1819 | server_port->server_addr.port_id = port_id; |
| 1820 | server_port->xprt_info = xprt_info; |
| 1821 | list_add_tail(&server_port->list, &server->server_port_list); |
| 1822 | server->next_pdev_id++; |
| 1823 | platform_device_add(server_port->pdev); |
| 1824 | |
| 1825 | return_server: |
| 1826 | /* Add a reference so that the caller can put it back */ |
| 1827 | kref_get(&server->ref); |
| 1828 | up_write(&server_list_lock_lha2); |
| 1829 | return server; |
| 1830 | } |
| 1831 | |
| 1832 | /** |
| 1833 | * ipc_router_destroy_server_nolock() - Remove server info from hash table |
| 1834 | * @server: Server info to be removed. |
| 1835 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1836 | * @port_id: Port ID within the node in which the server is hosted. |
| 1837 | * |
| 1838 | * This function removes the server_port identified using <node_id:port_id> |
| 1839 | * from the server structure. If the server_port list under server structure |
| 1840 | * is empty after removal, then remove the server structure from the server |
| 1841 | * hash table. This function must be called with server_list_lock_lha2 locked. |
| 1842 | */ |
| 1843 | static void ipc_router_destroy_server_nolock(struct msm_ipc_server *server, |
| 1844 | u32 node_id, u32 port_id) |
| 1845 | { |
| 1846 | struct msm_ipc_server_port *server_port; |
| 1847 | bool server_port_found = false; |
| 1848 | |
| 1849 | if (!server) |
| 1850 | return; |
| 1851 | |
| 1852 | list_for_each_entry(server_port, &server->server_port_list, list) { |
| 1853 | if ((server_port->server_addr.node_id == node_id) && |
| 1854 | (server_port->server_addr.port_id == port_id)) { |
| 1855 | server_port_found = true; |
| 1856 | break; |
| 1857 | } |
| 1858 | } |
| 1859 | if (server_port_found && server_port) { |
| 1860 | platform_device_unregister(server_port->pdev); |
| 1861 | list_del(&server_port->list); |
| 1862 | kfree(server_port); |
| 1863 | } |
| 1864 | if (list_empty(&server->server_port_list)) { |
| 1865 | list_del(&server->list); |
| 1866 | kref_put(&server->ref, ipc_router_release_server); |
| 1867 | } |
| 1868 | } |
| 1869 | |
| 1870 | /** |
| 1871 | * ipc_router_destroy_server() - Remove server info from hash table |
| 1872 | * @server: Server info to be removed. |
| 1873 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1874 | * @port_id: Port ID within the node in which the server is hosted. |
| 1875 | * |
| 1876 | * This function removes the server_port identified using <node_id:port_id> |
| 1877 | * from the server structure. If the server_port list under server structure |
| 1878 | * is empty after removal, then remove the server structure from the server |
| 1879 | * hash table. |
| 1880 | */ |
| 1881 | static void ipc_router_destroy_server(struct msm_ipc_server *server, |
| 1882 | u32 node_id, u32 port_id) |
| 1883 | { |
| 1884 | down_write(&server_list_lock_lha2); |
| 1885 | ipc_router_destroy_server_nolock(server, node_id, port_id); |
| 1886 | up_write(&server_list_lock_lha2); |
| 1887 | } |
| 1888 | |
| 1889 | static int ipc_router_send_ctl_msg( |
| 1890 | struct msm_ipc_router_xprt_info *xprt_info, |
| 1891 | union rr_control_msg *msg, |
| 1892 | u32 dst_node_id) |
| 1893 | { |
| 1894 | struct rr_packet *pkt; |
| 1895 | struct sk_buff *ipc_rtr_pkt; |
| 1896 | struct rr_header_v1 *hdr; |
| 1897 | int pkt_size; |
| 1898 | void *data; |
| 1899 | int ret = -EINVAL; |
| 1900 | |
| 1901 | pkt = create_pkt(NULL); |
| 1902 | if (!pkt) { |
| 1903 | IPC_RTR_ERR("%s: pkt alloc failed\n", __func__); |
| 1904 | return -ENOMEM; |
| 1905 | } |
| 1906 | |
| 1907 | pkt_size = IPC_ROUTER_HDR_SIZE + sizeof(*msg); |
| 1908 | ipc_rtr_pkt = alloc_skb(pkt_size, GFP_KERNEL); |
| 1909 | if (!ipc_rtr_pkt) { |
| 1910 | IPC_RTR_ERR("%s: ipc_rtr_pkt alloc failed\n", __func__); |
| 1911 | release_pkt(pkt); |
| 1912 | return -ENOMEM; |
| 1913 | } |
| 1914 | |
| 1915 | skb_reserve(ipc_rtr_pkt, IPC_ROUTER_HDR_SIZE); |
| 1916 | data = skb_put(ipc_rtr_pkt, sizeof(*msg)); |
| 1917 | memcpy(data, msg, sizeof(*msg)); |
| 1918 | skb_queue_tail(pkt->pkt_fragment_q, ipc_rtr_pkt); |
| 1919 | pkt->length = sizeof(*msg); |
| 1920 | |
| 1921 | hdr = &pkt->hdr; |
| 1922 | hdr->version = IPC_ROUTER_V1; |
| 1923 | hdr->type = msg->cmd; |
| 1924 | hdr->src_node_id = IPC_ROUTER_NID_LOCAL; |
| 1925 | hdr->src_port_id = IPC_ROUTER_ADDRESS; |
| 1926 | hdr->control_flag = 0; |
| 1927 | hdr->size = sizeof(*msg); |
| 1928 | if (hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX || |
| 1929 | (!xprt_info && dst_node_id == IPC_ROUTER_NID_LOCAL)) |
| 1930 | hdr->dst_node_id = dst_node_id; |
| 1931 | else if (xprt_info) |
| 1932 | hdr->dst_node_id = xprt_info->remote_node_id; |
| 1933 | hdr->dst_port_id = IPC_ROUTER_ADDRESS; |
| 1934 | |
| 1935 | if (dst_node_id == IPC_ROUTER_NID_LOCAL && |
| 1936 | msg->cmd != IPC_ROUTER_CTRL_CMD_RESUME_TX) { |
| 1937 | ipc_router_log_msg(local_log_ctx, IPC_ROUTER_LOG_EVENT_TX, msg, |
| 1938 | hdr, NULL, NULL); |
| 1939 | ret = post_control_ports(pkt); |
| 1940 | } else if (dst_node_id == IPC_ROUTER_NID_LOCAL && |
| 1941 | msg->cmd == IPC_ROUTER_CTRL_CMD_RESUME_TX) { |
| 1942 | ipc_router_log_msg(local_log_ctx, IPC_ROUTER_LOG_EVENT_TX, msg, |
| 1943 | hdr, NULL, NULL); |
| 1944 | ret = process_resume_tx_msg(msg, pkt); |
| 1945 | } else if (xprt_info && (msg->cmd == IPC_ROUTER_CTRL_CMD_HELLO || |
| 1946 | xprt_info->initialized)) { |
| 1947 | mutex_lock(&xprt_info->tx_lock_lhb2); |
| 1948 | ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_TX, |
| 1949 | msg, hdr, NULL, NULL); |
| 1950 | ret = prepend_header(pkt, xprt_info); |
| 1951 | if (ret < 0) { |
| 1952 | mutex_unlock(&xprt_info->tx_lock_lhb2); |
| 1953 | IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| 1954 | release_pkt(pkt); |
| 1955 | return ret; |
| 1956 | } |
| 1957 | |
| 1958 | ret = xprt_info->xprt->write(pkt, pkt->length, xprt_info->xprt); |
| 1959 | mutex_unlock(&xprt_info->tx_lock_lhb2); |
| 1960 | } |
| 1961 | |
| 1962 | release_pkt(pkt); |
| 1963 | return ret; |
| 1964 | } |
| 1965 | |
| 1966 | static int |
| 1967 | msm_ipc_router_send_server_list(u32 node_id, |
| 1968 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1969 | { |
| 1970 | union rr_control_msg ctl; |
| 1971 | struct msm_ipc_server *server; |
| 1972 | struct msm_ipc_server_port *server_port; |
| 1973 | int i; |
| 1974 | |
| 1975 | if (!xprt_info || !xprt_info->initialized) { |
| 1976 | IPC_RTR_ERR("%s: Xprt info not initialized\n", __func__); |
| 1977 | return -EINVAL; |
| 1978 | } |
| 1979 | |
| 1980 | memset(&ctl, 0, sizeof(ctl)); |
| 1981 | ctl.cmd = IPC_ROUTER_CTRL_CMD_NEW_SERVER; |
| 1982 | |
| 1983 | for (i = 0; i < SRV_HASH_SIZE; i++) { |
| 1984 | list_for_each_entry(server, &server_list[i], list) { |
| 1985 | ctl.srv.service = server->name.service; |
| 1986 | ctl.srv.instance = server->name.instance; |
| 1987 | list_for_each_entry(server_port, |
| 1988 | &server->server_port_list, list) { |
| 1989 | if (server_port->server_addr.node_id != |
| 1990 | node_id) |
| 1991 | continue; |
| 1992 | |
| 1993 | ctl.srv.node_id = |
| 1994 | server_port->server_addr.node_id; |
| 1995 | ctl.srv.port_id = |
| 1996 | server_port->server_addr.port_id; |
| 1997 | ipc_router_send_ctl_msg |
| 1998 | (xprt_info, &ctl, |
| 1999 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2000 | } |
| 2001 | } |
| 2002 | } |
| 2003 | |
| 2004 | return 0; |
| 2005 | } |
| 2006 | |
| 2007 | static int broadcast_ctl_msg_locally(union rr_control_msg *msg) |
| 2008 | { |
| 2009 | return ipc_router_send_ctl_msg(NULL, msg, IPC_ROUTER_NID_LOCAL); |
| 2010 | } |
| 2011 | |
| 2012 | static int broadcast_ctl_msg(union rr_control_msg *ctl) |
| 2013 | { |
| 2014 | struct msm_ipc_router_xprt_info *xprt_info; |
| 2015 | |
| 2016 | down_read(&xprt_info_list_lock_lha5); |
| 2017 | list_for_each_entry(xprt_info, &xprt_info_list, list) { |
| 2018 | ipc_router_send_ctl_msg(xprt_info, ctl, |
| 2019 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2020 | } |
| 2021 | up_read(&xprt_info_list_lock_lha5); |
| 2022 | broadcast_ctl_msg_locally(ctl); |
| 2023 | |
| 2024 | return 0; |
| 2025 | } |
| 2026 | |
| 2027 | static int relay_ctl_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2028 | union rr_control_msg *ctl) |
| 2029 | { |
| 2030 | struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| 2031 | |
| 2032 | if (!xprt_info || !ctl) |
| 2033 | return -EINVAL; |
| 2034 | |
| 2035 | down_read(&xprt_info_list_lock_lha5); |
| 2036 | list_for_each_entry(fwd_xprt_info, &xprt_info_list, list) { |
| 2037 | if (xprt_info->xprt->link_id != fwd_xprt_info->xprt->link_id) |
| 2038 | ipc_router_send_ctl_msg(fwd_xprt_info, ctl, |
| 2039 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2040 | } |
| 2041 | up_read(&xprt_info_list_lock_lha5); |
| 2042 | |
| 2043 | return 0; |
| 2044 | } |
| 2045 | |
| 2046 | static int forward_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2047 | struct rr_packet *pkt) |
| 2048 | { |
| 2049 | struct rr_header_v1 *hdr; |
| 2050 | struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| 2051 | struct msm_ipc_routing_table_entry *rt_entry; |
| 2052 | int ret = 0; |
| 2053 | int fwd_xprt_option; |
| 2054 | |
| 2055 | if (!xprt_info || !pkt) |
| 2056 | return -EINVAL; |
| 2057 | |
| 2058 | hdr = &pkt->hdr; |
| 2059 | rt_entry = ipc_router_get_rtentry_ref(hdr->dst_node_id); |
| 2060 | if (!(rt_entry) || !(rt_entry->xprt_info)) { |
| 2061 | IPC_RTR_ERR("%s: Routing table not initialized\n", __func__); |
| 2062 | ret = -ENODEV; |
| 2063 | goto fm_error1; |
| 2064 | } |
| 2065 | |
| 2066 | down_read(&rt_entry->lock_lha4); |
| 2067 | fwd_xprt_info = rt_entry->xprt_info; |
| 2068 | ret = ipc_router_get_xprt_info_ref(fwd_xprt_info); |
| 2069 | if (ret < 0) { |
| 2070 | IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| 2071 | goto fm_error_xprt; |
| 2072 | } |
| 2073 | ret = prepend_header(pkt, fwd_xprt_info); |
| 2074 | if (ret < 0) { |
| 2075 | IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| 2076 | goto fm_error2; |
| 2077 | } |
| 2078 | fwd_xprt_option = fwd_xprt_info->xprt->get_option(fwd_xprt_info->xprt); |
| 2079 | if (!(fwd_xprt_option & FRAG_PKT_WRITE_ENABLE)) { |
| 2080 | ret = defragment_pkt(pkt); |
| 2081 | if (ret < 0) |
| 2082 | goto fm_error2; |
| 2083 | } |
| 2084 | |
| 2085 | mutex_lock(&fwd_xprt_info->tx_lock_lhb2); |
| 2086 | if (xprt_info->remote_node_id == fwd_xprt_info->remote_node_id) { |
| 2087 | IPC_RTR_ERR("%s: Discarding Command to route back\n", __func__); |
| 2088 | ret = -EINVAL; |
| 2089 | goto fm_error3; |
| 2090 | } |
| 2091 | |
| 2092 | if (xprt_info->xprt->link_id == fwd_xprt_info->xprt->link_id) { |
| 2093 | IPC_RTR_ERR("%s: DST in the same cluster\n", __func__); |
| 2094 | ret = 0; |
| 2095 | goto fm_error3; |
| 2096 | } |
| 2097 | fwd_xprt_info->xprt->write(pkt, pkt->length, fwd_xprt_info->xprt); |
| 2098 | IPC_RTR_INFO(fwd_xprt_info->log_ctx, |
| 2099 | "%s %s Len:0x%x T:0x%x CF:0x%x SRC:<0x%x:0x%x> DST:<0x%x:0x%x>\n", |
| 2100 | "FWD", "TX", hdr->size, hdr->type, hdr->control_flag, |
| 2101 | hdr->src_node_id, hdr->src_port_id, |
| 2102 | hdr->dst_node_id, hdr->dst_port_id); |
| 2103 | |
| 2104 | fm_error3: |
| 2105 | mutex_unlock(&fwd_xprt_info->tx_lock_lhb2); |
| 2106 | fm_error2: |
| 2107 | ipc_router_put_xprt_info_ref(fwd_xprt_info); |
| 2108 | fm_error_xprt: |
| 2109 | up_read(&rt_entry->lock_lha4); |
| 2110 | fm_error1: |
| 2111 | if (rt_entry) |
| 2112 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2113 | return ret; |
| 2114 | } |
| 2115 | |
| 2116 | static int msm_ipc_router_send_remove_client(struct comm_mode_info *mode_info, |
| 2117 | u32 node_id, u32 port_id) |
| 2118 | { |
| 2119 | union rr_control_msg msg; |
| 2120 | struct msm_ipc_router_xprt_info *tmp_xprt_info; |
| 2121 | int mode; |
| 2122 | void *xprt_info; |
| 2123 | int rc = 0; |
| 2124 | |
| 2125 | if (!mode_info) { |
| 2126 | IPC_RTR_ERR("%s: NULL mode_info\n", __func__); |
| 2127 | return -EINVAL; |
| 2128 | } |
| 2129 | mode = mode_info->mode; |
| 2130 | xprt_info = mode_info->xprt_info; |
| 2131 | |
| 2132 | memset(&msg, 0, sizeof(msg)); |
| 2133 | msg.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| 2134 | msg.cli.node_id = node_id; |
| 2135 | msg.cli.port_id = port_id; |
| 2136 | |
| 2137 | if ((mode == SINGLE_LINK_MODE) && xprt_info) { |
| 2138 | down_read(&xprt_info_list_lock_lha5); |
| 2139 | list_for_each_entry(tmp_xprt_info, &xprt_info_list, list) { |
| 2140 | if (tmp_xprt_info != xprt_info) |
| 2141 | continue; |
| 2142 | ipc_router_send_ctl_msg(tmp_xprt_info, &msg, |
| 2143 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2144 | break; |
| 2145 | } |
| 2146 | up_read(&xprt_info_list_lock_lha5); |
| 2147 | } else if ((mode == SINGLE_LINK_MODE) && !xprt_info) { |
| 2148 | broadcast_ctl_msg_locally(&msg); |
| 2149 | } else if (mode == MULTI_LINK_MODE) { |
| 2150 | broadcast_ctl_msg(&msg); |
| 2151 | } else if (mode != NULL_MODE) { |
| 2152 | IPC_RTR_ERR( |
| 2153 | "%s: Invalid mode(%d) + xprt_inf(%p) for %08x:%08x\n", |
| 2154 | __func__, mode, xprt_info, node_id, port_id); |
| 2155 | rc = -EINVAL; |
| 2156 | } |
| 2157 | return rc; |
| 2158 | } |
| 2159 | |
| 2160 | static void update_comm_mode_info(struct comm_mode_info *mode_info, |
| 2161 | struct msm_ipc_router_xprt_info *xprt_info) |
| 2162 | { |
| 2163 | if (!mode_info) { |
| 2164 | IPC_RTR_ERR("%s: NULL mode_info\n", __func__); |
| 2165 | return; |
| 2166 | } |
| 2167 | |
| 2168 | if (mode_info->mode == NULL_MODE) { |
| 2169 | mode_info->xprt_info = xprt_info; |
| 2170 | mode_info->mode = SINGLE_LINK_MODE; |
| 2171 | } else if (mode_info->mode == SINGLE_LINK_MODE && |
| 2172 | mode_info->xprt_info != xprt_info) { |
| 2173 | mode_info->mode = MULTI_LINK_MODE; |
| 2174 | } |
| 2175 | } |
| 2176 | |
| 2177 | /** |
| 2178 | * cleanup_rmt_server() - Cleanup server hosted in the remote port |
| 2179 | * @xprt_info: XPRT through which this cleanup event is handled. |
| 2180 | * @rport_ptr: Remote port that is being cleaned up. |
| 2181 | * @server: Server that is hosted in the remote port. |
| 2182 | */ |
| 2183 | static void cleanup_rmt_server(struct msm_ipc_router_xprt_info *xprt_info, |
| 2184 | struct msm_ipc_router_remote_port *rport_ptr, |
| 2185 | struct msm_ipc_server *server) |
| 2186 | { |
| 2187 | union rr_control_msg ctl; |
| 2188 | |
| 2189 | memset(&ctl, 0, sizeof(ctl)); |
| 2190 | ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| 2191 | ctl.srv.service = server->name.service; |
| 2192 | ctl.srv.instance = server->name.instance; |
| 2193 | ctl.srv.node_id = rport_ptr->node_id; |
| 2194 | ctl.srv.port_id = rport_ptr->port_id; |
| 2195 | if (xprt_info) |
| 2196 | relay_ctl_msg(xprt_info, &ctl); |
| 2197 | broadcast_ctl_msg_locally(&ctl); |
| 2198 | ipc_router_destroy_server_nolock(server, rport_ptr->node_id, |
| 2199 | rport_ptr->port_id); |
| 2200 | } |
| 2201 | |
| 2202 | static void cleanup_rmt_ports(struct msm_ipc_router_xprt_info *xprt_info, |
| 2203 | struct msm_ipc_routing_table_entry *rt_entry) |
| 2204 | { |
| 2205 | struct msm_ipc_router_remote_port *rport_ptr, *tmp_rport_ptr; |
| 2206 | struct msm_ipc_server *server; |
| 2207 | union rr_control_msg ctl; |
| 2208 | int j; |
| 2209 | |
| 2210 | memset(&ctl, 0, sizeof(ctl)); |
| 2211 | for (j = 0; j < RP_HASH_SIZE; j++) { |
| 2212 | list_for_each_entry_safe(rport_ptr, tmp_rport_ptr, |
| 2213 | &rt_entry->remote_port_list[j], list) { |
| 2214 | list_del(&rport_ptr->list); |
| 2215 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2216 | server = rport_ptr->server; |
| 2217 | rport_ptr->server = NULL; |
| 2218 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2219 | ipc_router_reset_conn(rport_ptr); |
| 2220 | if (server) { |
| 2221 | cleanup_rmt_server(xprt_info, rport_ptr, |
| 2222 | server); |
| 2223 | server = NULL; |
| 2224 | } |
| 2225 | |
| 2226 | ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| 2227 | ctl.cli.node_id = rport_ptr->node_id; |
| 2228 | ctl.cli.port_id = rport_ptr->port_id; |
| 2229 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2230 | |
| 2231 | relay_ctl_msg(xprt_info, &ctl); |
| 2232 | broadcast_ctl_msg_locally(&ctl); |
| 2233 | } |
| 2234 | } |
| 2235 | } |
| 2236 | |
| 2237 | static void msm_ipc_cleanup_routing_table( |
| 2238 | struct msm_ipc_router_xprt_info *xprt_info) |
| 2239 | { |
| 2240 | int i; |
| 2241 | struct msm_ipc_routing_table_entry *rt_entry, *tmp_rt_entry; |
| 2242 | |
| 2243 | if (!xprt_info) { |
| 2244 | IPC_RTR_ERR("%s: Invalid xprt_info\n", __func__); |
| 2245 | return; |
| 2246 | } |
| 2247 | |
| 2248 | down_write(&server_list_lock_lha2); |
| 2249 | down_write(&routing_table_lock_lha3); |
| 2250 | for (i = 0; i < RT_HASH_SIZE; i++) { |
| 2251 | list_for_each_entry_safe(rt_entry, tmp_rt_entry, |
| 2252 | &routing_table[i], list) { |
| 2253 | down_write(&rt_entry->lock_lha4); |
| 2254 | if (rt_entry->xprt_info != xprt_info) { |
| 2255 | up_write(&rt_entry->lock_lha4); |
| 2256 | continue; |
| 2257 | } |
| 2258 | cleanup_rmt_ports(xprt_info, rt_entry); |
| 2259 | rt_entry->xprt_info = NULL; |
| 2260 | up_write(&rt_entry->lock_lha4); |
| 2261 | list_del(&rt_entry->list); |
| 2262 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2263 | } |
| 2264 | } |
| 2265 | up_write(&routing_table_lock_lha3); |
| 2266 | up_write(&server_list_lock_lha2); |
| 2267 | } |
| 2268 | |
| 2269 | /** |
| 2270 | * sync_sec_rule() - Synchrnoize the security rule into the server structure |
| 2271 | * @server: Server structure where the rule has to be synchronized. |
| 2272 | * @rule: Security tule to be synchronized. |
| 2273 | * |
| 2274 | * This function is used to update the server structure with the security |
| 2275 | * rule configured for the <service:instance> corresponding to that server. |
| 2276 | */ |
| 2277 | static void sync_sec_rule(struct msm_ipc_server *server, void *rule) |
| 2278 | { |
| 2279 | struct msm_ipc_server_port *server_port; |
| 2280 | struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| 2281 | |
| 2282 | list_for_each_entry(server_port, &server->server_port_list, list) { |
| 2283 | rport_ptr = ipc_router_get_rport_ref( |
| 2284 | server_port->server_addr.node_id, |
| 2285 | server_port->server_addr.port_id); |
| 2286 | if (!rport_ptr) |
| 2287 | continue; |
| 2288 | rport_ptr->sec_rule = rule; |
| 2289 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2290 | } |
| 2291 | server->synced_sec_rule = 1; |
| 2292 | } |
| 2293 | |
| 2294 | /** |
| 2295 | * msm_ipc_sync_sec_rule() - Sync the security rule to the service |
| 2296 | * @service: Service for which the rule has to be synchronized. |
| 2297 | * @instance: Instance for which the rule has to be synchronized. |
| 2298 | * @rule: Security rule to be synchronized. |
| 2299 | * |
| 2300 | * This function is used to syncrhonize the security rule with the server |
| 2301 | * hash table, if the user-space script configures the rule after the service |
| 2302 | * has come up. This function is used to synchronize the security rule to a |
| 2303 | * specific service and optionally a specific instance. |
| 2304 | */ |
| 2305 | void msm_ipc_sync_sec_rule(u32 service, u32 instance, void *rule) |
| 2306 | { |
| 2307 | int key = (service & (SRV_HASH_SIZE - 1)); |
| 2308 | struct msm_ipc_server *server; |
| 2309 | |
| 2310 | down_write(&server_list_lock_lha2); |
| 2311 | list_for_each_entry(server, &server_list[key], list) { |
| 2312 | if (server->name.service != service) |
| 2313 | continue; |
| 2314 | |
| 2315 | if (server->name.instance != instance && |
| 2316 | instance != ALL_INSTANCE) |
| 2317 | continue; |
| 2318 | |
| 2319 | /* If the rule applies to all instances and if the specific |
| 2320 | * instance of a service has a rule synchronized already, |
| 2321 | * do not apply the rule for that specific instance. |
| 2322 | */ |
| 2323 | if (instance == ALL_INSTANCE && server->synced_sec_rule) |
| 2324 | continue; |
| 2325 | |
| 2326 | sync_sec_rule(server, rule); |
| 2327 | } |
| 2328 | up_write(&server_list_lock_lha2); |
| 2329 | } |
| 2330 | |
| 2331 | /** |
| 2332 | * msm_ipc_sync_default_sec_rule() - Default security rule to all services |
| 2333 | * @rule: Security rule to be synchronized. |
| 2334 | * |
| 2335 | * This function is used to syncrhonize the security rule with the server |
| 2336 | * hash table, if the user-space script configures the rule after the service |
| 2337 | * has come up. This function is used to synchronize the security rule that |
| 2338 | * applies to all services, if the concerned service do not have any rule |
| 2339 | * defined. |
| 2340 | */ |
| 2341 | void msm_ipc_sync_default_sec_rule(void *rule) |
| 2342 | { |
| 2343 | int key; |
| 2344 | struct msm_ipc_server *server; |
| 2345 | |
| 2346 | down_write(&server_list_lock_lha2); |
| 2347 | for (key = 0; key < SRV_HASH_SIZE; key++) { |
| 2348 | list_for_each_entry(server, &server_list[key], list) { |
| 2349 | if (server->synced_sec_rule) |
| 2350 | continue; |
| 2351 | |
| 2352 | sync_sec_rule(server, rule); |
| 2353 | } |
| 2354 | } |
| 2355 | up_write(&server_list_lock_lha2); |
| 2356 | } |
| 2357 | |
| 2358 | /** |
| 2359 | * ipc_router_reset_conn() - Reset the connection to remote port |
| 2360 | * @rport_ptr: Pointer to the remote port to be disconnected. |
| 2361 | * |
| 2362 | * This function is used to reset all the local ports that are connected to |
| 2363 | * the remote port being passed. |
| 2364 | */ |
| 2365 | static void ipc_router_reset_conn(struct msm_ipc_router_remote_port *rport_ptr) |
| 2366 | { |
| 2367 | struct msm_ipc_port *port_ptr; |
| 2368 | struct ipc_router_conn_info *conn_info, *tmp_conn_info; |
| 2369 | |
| 2370 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2371 | list_for_each_entry_safe(conn_info, tmp_conn_info, |
| 2372 | &rport_ptr->conn_info_list, list) { |
| 2373 | port_ptr = ipc_router_get_port_ref(conn_info->port_id); |
| 2374 | if (port_ptr) { |
| 2375 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2376 | port_ptr->conn_status = CONNECTION_RESET; |
| 2377 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2378 | wake_up(&port_ptr->port_rx_wait_q); |
| 2379 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2380 | } |
| 2381 | |
| 2382 | list_del(&conn_info->list); |
| 2383 | kfree(conn_info); |
| 2384 | } |
| 2385 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2386 | } |
| 2387 | |
| 2388 | /** |
| 2389 | * ipc_router_set_conn() - Set the connection by initializing dest address |
| 2390 | * @port_ptr: Local port in which the connection has to be set. |
| 2391 | * @addr: Destination address of the connection. |
| 2392 | * |
| 2393 | * @return: 0 on success, standard Linux error codes on failure. |
| 2394 | */ |
| 2395 | int ipc_router_set_conn(struct msm_ipc_port *port_ptr, |
| 2396 | struct msm_ipc_addr *addr) |
| 2397 | { |
| 2398 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2399 | struct ipc_router_conn_info *conn_info; |
| 2400 | |
| 2401 | if (unlikely(!port_ptr || !addr)) |
| 2402 | return -EINVAL; |
| 2403 | |
| 2404 | if (addr->addrtype != MSM_IPC_ADDR_ID) { |
| 2405 | IPC_RTR_ERR("%s: Invalid Address type\n", __func__); |
| 2406 | return -EINVAL; |
| 2407 | } |
| 2408 | |
| 2409 | if (port_ptr->type == SERVER_PORT) { |
| 2410 | IPC_RTR_ERR("%s: Connection refused on a server port\n", |
| 2411 | __func__); |
| 2412 | return -ECONNREFUSED; |
| 2413 | } |
| 2414 | |
| 2415 | if (port_ptr->conn_status == CONNECTED) { |
| 2416 | IPC_RTR_ERR("%s: Port %08x already connected\n", |
| 2417 | __func__, port_ptr->this_port.port_id); |
| 2418 | return -EISCONN; |
| 2419 | } |
| 2420 | |
| 2421 | conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); |
| 2422 | if (!conn_info) { |
| 2423 | IPC_RTR_ERR("%s: Error allocating conn_info\n", __func__); |
| 2424 | return -ENOMEM; |
| 2425 | } |
| 2426 | INIT_LIST_HEAD(&conn_info->list); |
| 2427 | conn_info->port_id = port_ptr->this_port.port_id; |
| 2428 | |
| 2429 | rport_ptr = ipc_router_get_rport_ref(addr->addr.port_addr.node_id, |
| 2430 | addr->addr.port_addr.port_id); |
| 2431 | if (!rport_ptr) { |
| 2432 | IPC_RTR_ERR("%s: Invalid remote endpoint\n", __func__); |
| 2433 | kfree(conn_info); |
| 2434 | return -ENODEV; |
| 2435 | } |
| 2436 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2437 | list_add_tail(&conn_info->list, &rport_ptr->conn_info_list); |
| 2438 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2439 | |
| 2440 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2441 | memcpy(&port_ptr->dest_addr, &addr->addr.port_addr, |
| 2442 | sizeof(struct msm_ipc_port_addr)); |
| 2443 | port_ptr->conn_status = CONNECTED; |
| 2444 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2445 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2446 | return 0; |
| 2447 | } |
| 2448 | |
| 2449 | /** |
| 2450 | * do_version_negotiation() - perform a version negotiation and set the version |
| 2451 | * @xprt_info: Pointer to the IPC Router transport info structure. |
| 2452 | * @msg: Pointer to the IPC Router HELLO message. |
| 2453 | * |
| 2454 | * This function performs the version negotiation by verifying the computed |
| 2455 | * checksum first. If the checksum matches with the magic number, it sets the |
| 2456 | * negotiated IPC Router version in transport. |
| 2457 | */ |
| 2458 | static void do_version_negotiation(struct msm_ipc_router_xprt_info *xprt_info, |
| 2459 | union rr_control_msg *msg) |
| 2460 | { |
| 2461 | u32 magic; |
| 2462 | unsigned int version; |
| 2463 | |
| 2464 | if (!xprt_info) |
| 2465 | return; |
| 2466 | magic = ipc_router_calc_checksum(msg); |
| 2467 | if (magic == IPC_ROUTER_HELLO_MAGIC) { |
| 2468 | version = fls(msg->hello.versions & IPC_ROUTER_VER_BITMASK) - 1; |
| 2469 | /*Bit 0 & 31 are reserved for future usage*/ |
| 2470 | if ((version > 0) && |
| 2471 | (version != (sizeof(version) * BITS_PER_BYTE - 1)) && |
| 2472 | xprt_info->xprt->set_version) |
| 2473 | xprt_info->xprt->set_version(xprt_info->xprt, version); |
| 2474 | } |
| 2475 | } |
| 2476 | |
| 2477 | static int process_hello_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2478 | union rr_control_msg *msg, |
| 2479 | struct rr_header_v1 *hdr) |
| 2480 | { |
| 2481 | int i, rc = 0; |
| 2482 | union rr_control_msg ctl; |
| 2483 | struct msm_ipc_routing_table_entry *rt_entry; |
| 2484 | |
| 2485 | if (!hdr) |
| 2486 | return -EINVAL; |
| 2487 | |
| 2488 | xprt_info->remote_node_id = hdr->src_node_id; |
| 2489 | rt_entry = create_routing_table_entry(hdr->src_node_id, xprt_info); |
| 2490 | if (!rt_entry) { |
| 2491 | IPC_RTR_ERR("%s: rt_entry allocation failed\n", __func__); |
| 2492 | return -ENOMEM; |
| 2493 | } |
| 2494 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2495 | |
| 2496 | do_version_negotiation(xprt_info, msg); |
| 2497 | /* Send a reply HELLO message */ |
| 2498 | memset(&ctl, 0, sizeof(ctl)); |
| 2499 | ctl.hello.cmd = IPC_ROUTER_CTRL_CMD_HELLO; |
| 2500 | ctl.hello.checksum = IPC_ROUTER_HELLO_MAGIC; |
| 2501 | ctl.hello.versions = (u32)IPC_ROUTER_VER_BITMASK; |
| 2502 | ctl.hello.checksum = ipc_router_calc_checksum(&ctl); |
| 2503 | rc = ipc_router_send_ctl_msg(xprt_info, &ctl, |
| 2504 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2505 | if (rc < 0) { |
| 2506 | IPC_RTR_ERR("%s: Error sending reply HELLO message\n", |
| 2507 | __func__); |
| 2508 | return rc; |
| 2509 | } |
| 2510 | xprt_info->initialized = 1; |
| 2511 | |
| 2512 | /* Send list of servers from the local node and from nodes |
| 2513 | * outside the mesh network in which this XPRT is part of. |
| 2514 | */ |
| 2515 | down_read(&server_list_lock_lha2); |
| 2516 | down_read(&routing_table_lock_lha3); |
| 2517 | for (i = 0; i < RT_HASH_SIZE; i++) { |
| 2518 | list_for_each_entry(rt_entry, &routing_table[i], list) { |
| 2519 | if ((rt_entry->node_id != IPC_ROUTER_NID_LOCAL) && |
| 2520 | (!rt_entry->xprt_info || |
| 2521 | (rt_entry->xprt_info->xprt->link_id == |
| 2522 | xprt_info->xprt->link_id))) |
| 2523 | continue; |
| 2524 | rc = msm_ipc_router_send_server_list(rt_entry->node_id, |
| 2525 | xprt_info); |
| 2526 | if (rc < 0) { |
| 2527 | up_read(&routing_table_lock_lha3); |
| 2528 | up_read(&server_list_lock_lha2); |
| 2529 | return rc; |
| 2530 | } |
| 2531 | } |
| 2532 | } |
| 2533 | up_read(&routing_table_lock_lha3); |
| 2534 | up_read(&server_list_lock_lha2); |
| 2535 | return rc; |
| 2536 | } |
| 2537 | |
| 2538 | static int process_resume_tx_msg(union rr_control_msg *msg, |
| 2539 | struct rr_packet *pkt) |
| 2540 | { |
| 2541 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2542 | |
| 2543 | rport_ptr = ipc_router_get_rport_ref(msg->cli.node_id, |
| 2544 | msg->cli.port_id); |
| 2545 | if (!rport_ptr) { |
| 2546 | IPC_RTR_ERR("%s: Unable to resume client\n", __func__); |
| 2547 | return -ENODEV; |
| 2548 | } |
| 2549 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2550 | rport_ptr->tx_quota_cnt = 0; |
| 2551 | post_resume_tx(rport_ptr, pkt, msg); |
| 2552 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2553 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2554 | return 0; |
| 2555 | } |
| 2556 | |
| 2557 | static int process_new_server_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2558 | union rr_control_msg *msg, |
| 2559 | struct rr_packet *pkt) |
| 2560 | { |
| 2561 | struct msm_ipc_routing_table_entry *rt_entry; |
| 2562 | struct msm_ipc_server *server; |
| 2563 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2564 | |
| 2565 | if (msg->srv.instance == 0) { |
| 2566 | IPC_RTR_ERR("%s: Server %08x create rejected, version = 0\n", |
| 2567 | __func__, msg->srv.service); |
| 2568 | return -EINVAL; |
| 2569 | } |
| 2570 | |
| 2571 | rt_entry = ipc_router_get_rtentry_ref(msg->srv.node_id); |
| 2572 | if (!rt_entry) { |
| 2573 | rt_entry = create_routing_table_entry(msg->srv.node_id, |
| 2574 | xprt_info); |
| 2575 | if (!rt_entry) { |
| 2576 | IPC_RTR_ERR("%s: rt_entry allocation failed\n", |
| 2577 | __func__); |
| 2578 | return -ENOMEM; |
| 2579 | } |
| 2580 | } |
| 2581 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2582 | |
| 2583 | /* If the service already exists in the table, create_server returns |
| 2584 | * a reference to it. |
| 2585 | */ |
| 2586 | rport_ptr = ipc_router_create_rport(msg->srv.node_id, |
| 2587 | msg->srv.port_id, xprt_info); |
| 2588 | if (!rport_ptr) |
| 2589 | return -ENOMEM; |
| 2590 | |
| 2591 | server = msm_ipc_router_create_server( |
| 2592 | msg->srv.service, msg->srv.instance, |
| 2593 | msg->srv.node_id, msg->srv.port_id, xprt_info); |
| 2594 | if (!server) { |
| 2595 | IPC_RTR_ERR("%s: Server %08x:%08x Create failed\n", |
| 2596 | __func__, msg->srv.service, msg->srv.instance); |
| 2597 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2598 | ipc_router_destroy_rport(rport_ptr); |
| 2599 | return -ENOMEM; |
| 2600 | } |
| 2601 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2602 | rport_ptr->server = server; |
| 2603 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2604 | rport_ptr->sec_rule = msm_ipc_get_security_rule( |
| 2605 | msg->srv.service, msg->srv.instance); |
| 2606 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2607 | kref_put(&server->ref, ipc_router_release_server); |
| 2608 | |
| 2609 | /* Relay the new server message to other subsystems that do not belong |
| 2610 | * to the cluster from which this message is received. Notify the |
| 2611 | * local clients waiting for this service. |
| 2612 | */ |
| 2613 | relay_ctl_msg(xprt_info, msg); |
| 2614 | post_control_ports(pkt); |
| 2615 | return 0; |
| 2616 | } |
| 2617 | |
| 2618 | static int process_rmv_server_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2619 | union rr_control_msg *msg, |
| 2620 | struct rr_packet *pkt) |
| 2621 | { |
| 2622 | struct msm_ipc_server *server; |
| 2623 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2624 | |
| 2625 | server = ipc_router_get_server_ref(msg->srv.service, msg->srv.instance, |
| 2626 | msg->srv.node_id, msg->srv.port_id); |
| 2627 | rport_ptr = ipc_router_get_rport_ref(msg->srv.node_id, |
| 2628 | msg->srv.port_id); |
| 2629 | if (rport_ptr) { |
| 2630 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2631 | if (rport_ptr->server == server) |
| 2632 | rport_ptr->server = NULL; |
| 2633 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2634 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2635 | } |
| 2636 | |
| 2637 | if (server) { |
| 2638 | kref_put(&server->ref, ipc_router_release_server); |
| 2639 | ipc_router_destroy_server(server, msg->srv.node_id, |
| 2640 | msg->srv.port_id); |
| 2641 | /* Relay the new server message to other subsystems that do not |
| 2642 | * belong to the cluster from which this message is received. |
| 2643 | * Notify the local clients communicating with the service. |
| 2644 | */ |
| 2645 | relay_ctl_msg(xprt_info, msg); |
| 2646 | post_control_ports(pkt); |
| 2647 | } |
| 2648 | return 0; |
| 2649 | } |
| 2650 | |
| 2651 | static int process_rmv_client_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2652 | union rr_control_msg *msg, |
| 2653 | struct rr_packet *pkt) |
| 2654 | { |
| 2655 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2656 | struct msm_ipc_server *server; |
| 2657 | |
| 2658 | rport_ptr = ipc_router_get_rport_ref(msg->cli.node_id, |
| 2659 | msg->cli.port_id); |
| 2660 | if (rport_ptr) { |
| 2661 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2662 | server = rport_ptr->server; |
| 2663 | rport_ptr->server = NULL; |
| 2664 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2665 | ipc_router_reset_conn(rport_ptr); |
| 2666 | down_write(&server_list_lock_lha2); |
| 2667 | if (server) |
| 2668 | cleanup_rmt_server(NULL, rport_ptr, server); |
| 2669 | up_write(&server_list_lock_lha2); |
| 2670 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2671 | ipc_router_destroy_rport(rport_ptr); |
| 2672 | } |
| 2673 | |
| 2674 | relay_ctl_msg(xprt_info, msg); |
| 2675 | post_control_ports(pkt); |
| 2676 | return 0; |
| 2677 | } |
| 2678 | |
| 2679 | static int process_control_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2680 | struct rr_packet *pkt) |
| 2681 | { |
| 2682 | union rr_control_msg *msg; |
| 2683 | int rc = 0; |
| 2684 | struct rr_header_v1 *hdr; |
| 2685 | |
| 2686 | if (pkt->length != sizeof(*msg)) { |
| 2687 | IPC_RTR_ERR("%s: r2r msg size %d != %zu\n", __func__, |
| 2688 | pkt->length, sizeof(*msg)); |
| 2689 | return -EINVAL; |
| 2690 | } |
| 2691 | |
| 2692 | hdr = &pkt->hdr; |
| 2693 | msg = msm_ipc_router_skb_to_buf(pkt->pkt_fragment_q, sizeof(*msg)); |
| 2694 | if (!msg) { |
| 2695 | IPC_RTR_ERR("%s: Error extracting control msg\n", __func__); |
| 2696 | return -ENOMEM; |
| 2697 | } |
| 2698 | |
| 2699 | ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_RX, msg, |
| 2700 | hdr, NULL, NULL); |
| 2701 | |
| 2702 | switch (msg->cmd) { |
| 2703 | case IPC_ROUTER_CTRL_CMD_HELLO: |
| 2704 | rc = process_hello_msg(xprt_info, msg, hdr); |
| 2705 | break; |
| 2706 | case IPC_ROUTER_CTRL_CMD_RESUME_TX: |
| 2707 | rc = process_resume_tx_msg(msg, pkt); |
| 2708 | break; |
| 2709 | case IPC_ROUTER_CTRL_CMD_NEW_SERVER: |
| 2710 | rc = process_new_server_msg(xprt_info, msg, pkt); |
| 2711 | break; |
| 2712 | case IPC_ROUTER_CTRL_CMD_REMOVE_SERVER: |
| 2713 | rc = process_rmv_server_msg(xprt_info, msg, pkt); |
| 2714 | break; |
| 2715 | case IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT: |
| 2716 | rc = process_rmv_client_msg(xprt_info, msg, pkt); |
| 2717 | break; |
| 2718 | default: |
| 2719 | rc = -EINVAL; |
| 2720 | } |
| 2721 | kfree(msg); |
| 2722 | return rc; |
| 2723 | } |
| 2724 | |
| 2725 | static void do_read_data(struct work_struct *work) |
| 2726 | { |
| 2727 | struct rr_header_v1 *hdr; |
| 2728 | struct rr_packet *pkt = NULL; |
| 2729 | struct msm_ipc_port *port_ptr; |
| 2730 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2731 | int ret; |
| 2732 | |
| 2733 | struct msm_ipc_router_xprt_info *xprt_info = |
| 2734 | container_of(work, |
| 2735 | struct msm_ipc_router_xprt_info, |
| 2736 | read_data); |
| 2737 | |
| 2738 | while ((pkt = rr_read(xprt_info)) != NULL) { |
| 2739 | if (pkt->length < calc_rx_header_size(xprt_info) || |
| 2740 | pkt->length > MAX_IPC_PKT_SIZE) { |
| 2741 | IPC_RTR_ERR("%s: Invalid pkt length %d\n", __func__, |
| 2742 | pkt->length); |
| 2743 | goto read_next_pkt1; |
| 2744 | } |
| 2745 | |
| 2746 | ret = extract_header(pkt); |
| 2747 | if (ret < 0) |
| 2748 | goto read_next_pkt1; |
| 2749 | hdr = &pkt->hdr; |
| 2750 | |
| 2751 | if ((hdr->dst_node_id != IPC_ROUTER_NID_LOCAL) && |
| 2752 | ((hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX) || |
| 2753 | (hdr->type == IPC_ROUTER_CTRL_CMD_DATA))) { |
| 2754 | IPC_RTR_INFO(xprt_info->log_ctx, |
| 2755 | "%s %s Len:0x%x T:0x%x CF:0x%x SRC:<0x%x:0x%x> DST:<0x%x:0x%x>\n", |
| 2756 | "FWD", "RX", hdr->size, hdr->type, |
| 2757 | hdr->control_flag, hdr->src_node_id, |
| 2758 | hdr->src_port_id, hdr->dst_node_id, |
| 2759 | hdr->dst_port_id); |
| 2760 | forward_msg(xprt_info, pkt); |
| 2761 | goto read_next_pkt1; |
| 2762 | } |
| 2763 | |
| 2764 | if (hdr->type != IPC_ROUTER_CTRL_CMD_DATA) { |
| 2765 | process_control_msg(xprt_info, pkt); |
| 2766 | goto read_next_pkt1; |
| 2767 | } |
| 2768 | |
| 2769 | port_ptr = ipc_router_get_port_ref(hdr->dst_port_id); |
| 2770 | if (!port_ptr) { |
| 2771 | IPC_RTR_ERR("%s: No local port id %08x\n", __func__, |
| 2772 | hdr->dst_port_id); |
| 2773 | goto read_next_pkt1; |
| 2774 | } |
| 2775 | |
| 2776 | rport_ptr = ipc_router_get_rport_ref(hdr->src_node_id, |
| 2777 | hdr->src_port_id); |
| 2778 | if (!rport_ptr) { |
| 2779 | rport_ptr = ipc_router_create_rport(hdr->src_node_id, |
| 2780 | hdr->src_port_id, |
| 2781 | xprt_info); |
| 2782 | if (!rport_ptr) { |
| 2783 | IPC_RTR_ERR( |
| 2784 | "%s: Rmt Prt %08x:%08x create failed\n", |
| 2785 | __func__, hdr->src_node_id, |
| 2786 | hdr->src_port_id); |
| 2787 | goto read_next_pkt2; |
| 2788 | } |
| 2789 | } |
| 2790 | |
| 2791 | ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_RX, |
| 2792 | pkt, hdr, port_ptr, rport_ptr); |
| 2793 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2794 | post_pkt_to_port(port_ptr, pkt, 0); |
| 2795 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2796 | continue; |
| 2797 | read_next_pkt2: |
| 2798 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2799 | read_next_pkt1: |
| 2800 | release_pkt(pkt); |
| 2801 | } |
| 2802 | } |
| 2803 | |
| 2804 | int msm_ipc_router_register_server(struct msm_ipc_port *port_ptr, |
| 2805 | struct msm_ipc_addr *name) |
| 2806 | { |
| 2807 | struct msm_ipc_server *server; |
| 2808 | union rr_control_msg ctl; |
| 2809 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2810 | |
| 2811 | if (!port_ptr || !name) |
| 2812 | return -EINVAL; |
| 2813 | |
Karthikeyan Ramasubramanian | 63cf359 | 2016-12-15 08:13:20 -0700 | [diff] [blame] | 2814 | if (port_ptr->type != CLIENT_PORT) |
| 2815 | return -EINVAL; |
| 2816 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2817 | if (name->addrtype != MSM_IPC_ADDR_NAME) |
| 2818 | return -EINVAL; |
| 2819 | |
| 2820 | rport_ptr = ipc_router_create_rport(IPC_ROUTER_NID_LOCAL, |
| 2821 | port_ptr->this_port.port_id, NULL); |
| 2822 | if (!rport_ptr) { |
| 2823 | IPC_RTR_ERR("%s: RPort %08x:%08x creation failed\n", __func__, |
| 2824 | IPC_ROUTER_NID_LOCAL, port_ptr->this_port.port_id); |
| 2825 | return -ENOMEM; |
| 2826 | } |
| 2827 | |
| 2828 | server = msm_ipc_router_create_server(name->addr.port_name.service, |
| 2829 | name->addr.port_name.instance, |
| 2830 | IPC_ROUTER_NID_LOCAL, |
| 2831 | port_ptr->this_port.port_id, |
| 2832 | NULL); |
| 2833 | if (!server) { |
| 2834 | IPC_RTR_ERR("%s: Server %08x:%08x Create failed\n", |
| 2835 | __func__, name->addr.port_name.service, |
| 2836 | name->addr.port_name.instance); |
| 2837 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2838 | ipc_router_destroy_rport(rport_ptr); |
| 2839 | return -ENOMEM; |
| 2840 | } |
| 2841 | |
| 2842 | memset(&ctl, 0, sizeof(ctl)); |
| 2843 | ctl.cmd = IPC_ROUTER_CTRL_CMD_NEW_SERVER; |
| 2844 | ctl.srv.service = server->name.service; |
| 2845 | ctl.srv.instance = server->name.instance; |
| 2846 | ctl.srv.node_id = IPC_ROUTER_NID_LOCAL; |
| 2847 | ctl.srv.port_id = port_ptr->this_port.port_id; |
| 2848 | broadcast_ctl_msg(&ctl); |
| 2849 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2850 | port_ptr->type = SERVER_PORT; |
| 2851 | port_ptr->mode_info.mode = MULTI_LINK_MODE; |
| 2852 | port_ptr->port_name.service = server->name.service; |
| 2853 | port_ptr->port_name.instance = server->name.instance; |
| 2854 | port_ptr->rport_info = rport_ptr; |
| 2855 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2856 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2857 | kref_put(&server->ref, ipc_router_release_server); |
| 2858 | return 0; |
| 2859 | } |
| 2860 | |
| 2861 | int msm_ipc_router_unregister_server(struct msm_ipc_port *port_ptr) |
| 2862 | { |
| 2863 | struct msm_ipc_server *server; |
| 2864 | union rr_control_msg ctl; |
| 2865 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2866 | |
| 2867 | if (!port_ptr) |
| 2868 | return -EINVAL; |
| 2869 | |
| 2870 | if (port_ptr->type != SERVER_PORT) { |
| 2871 | IPC_RTR_ERR("%s: Trying to unregister a non-server port\n", |
| 2872 | __func__); |
| 2873 | return -EINVAL; |
| 2874 | } |
| 2875 | |
| 2876 | if (port_ptr->this_port.node_id != IPC_ROUTER_NID_LOCAL) { |
| 2877 | IPC_RTR_ERR( |
| 2878 | "%s: Trying to unregister a remote server locally\n", |
| 2879 | __func__); |
| 2880 | return -EINVAL; |
| 2881 | } |
| 2882 | |
| 2883 | server = ipc_router_get_server_ref(port_ptr->port_name.service, |
| 2884 | port_ptr->port_name.instance, |
| 2885 | port_ptr->this_port.node_id, |
| 2886 | port_ptr->this_port.port_id); |
| 2887 | if (!server) { |
| 2888 | IPC_RTR_ERR("%s: Server lookup failed\n", __func__); |
| 2889 | return -ENODEV; |
| 2890 | } |
| 2891 | |
| 2892 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2893 | port_ptr->type = CLIENT_PORT; |
| 2894 | rport_ptr = (struct msm_ipc_router_remote_port *)port_ptr->rport_info; |
| 2895 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2896 | if (rport_ptr) |
| 2897 | ipc_router_reset_conn(rport_ptr); |
| 2898 | memset(&ctl, 0, sizeof(ctl)); |
| 2899 | ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| 2900 | ctl.srv.service = server->name.service; |
| 2901 | ctl.srv.instance = server->name.instance; |
| 2902 | ctl.srv.node_id = IPC_ROUTER_NID_LOCAL; |
| 2903 | ctl.srv.port_id = port_ptr->this_port.port_id; |
| 2904 | kref_put(&server->ref, ipc_router_release_server); |
| 2905 | ipc_router_destroy_server(server, port_ptr->this_port.node_id, |
| 2906 | port_ptr->this_port.port_id); |
| 2907 | broadcast_ctl_msg(&ctl); |
| 2908 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2909 | port_ptr->type = CLIENT_PORT; |
| 2910 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2911 | return 0; |
| 2912 | } |
| 2913 | |
| 2914 | static int loopback_data(struct msm_ipc_port *src, |
| 2915 | u32 port_id, |
| 2916 | struct rr_packet *pkt) |
| 2917 | { |
| 2918 | struct msm_ipc_port *port_ptr; |
| 2919 | struct sk_buff *temp_skb; |
| 2920 | int align_size; |
| 2921 | |
| 2922 | if (!pkt) { |
| 2923 | IPC_RTR_ERR("%s: Invalid pkt pointer\n", __func__); |
| 2924 | return -EINVAL; |
| 2925 | } |
| 2926 | |
| 2927 | temp_skb = skb_peek_tail(pkt->pkt_fragment_q); |
| 2928 | align_size = ALIGN_SIZE(pkt->length); |
| 2929 | skb_put(temp_skb, align_size); |
| 2930 | pkt->length += align_size; |
| 2931 | |
| 2932 | port_ptr = ipc_router_get_port_ref(port_id); |
| 2933 | if (!port_ptr) { |
| 2934 | IPC_RTR_ERR("%s: Local port %d not present\n", __func__, |
| 2935 | port_id); |
| 2936 | return -ENODEV; |
| 2937 | } |
| 2938 | post_pkt_to_port(port_ptr, pkt, 1); |
| 2939 | update_comm_mode_info(&src->mode_info, NULL); |
| 2940 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2941 | |
| 2942 | return pkt->hdr.size; |
| 2943 | } |
| 2944 | |
| 2945 | static int ipc_router_tx_wait(struct msm_ipc_port *src, |
| 2946 | struct msm_ipc_router_remote_port *rport_ptr, |
| 2947 | u32 *set_confirm_rx, |
| 2948 | long timeout) |
| 2949 | { |
| 2950 | struct msm_ipc_resume_tx_port *resume_tx_port; |
| 2951 | int ret; |
| 2952 | |
| 2953 | if (unlikely(!src || !rport_ptr)) |
| 2954 | return -EINVAL; |
| 2955 | |
| 2956 | for (;;) { |
| 2957 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2958 | if (rport_ptr->status == RESET) { |
| 2959 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2960 | IPC_RTR_ERR("%s: RPort %08x:%08x is in reset state\n", |
| 2961 | __func__, rport_ptr->node_id, |
| 2962 | rport_ptr->port_id); |
| 2963 | return -ENETRESET; |
| 2964 | } |
| 2965 | |
| 2966 | if (rport_ptr->tx_quota_cnt < IPC_ROUTER_HIGH_RX_QUOTA) |
| 2967 | break; |
| 2968 | |
| 2969 | if (msm_ipc_router_lookup_resume_tx_port( |
| 2970 | rport_ptr, src->this_port.port_id)) |
| 2971 | goto check_timeo; |
| 2972 | |
| 2973 | resume_tx_port = |
| 2974 | kzalloc(sizeof(struct msm_ipc_resume_tx_port), |
| 2975 | GFP_KERNEL); |
| 2976 | if (!resume_tx_port) { |
| 2977 | IPC_RTR_ERR("%s: Resume_Tx port allocation failed\n", |
| 2978 | __func__); |
| 2979 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2980 | return -ENOMEM; |
| 2981 | } |
| 2982 | INIT_LIST_HEAD(&resume_tx_port->list); |
| 2983 | resume_tx_port->port_id = src->this_port.port_id; |
| 2984 | resume_tx_port->node_id = src->this_port.node_id; |
| 2985 | list_add_tail(&resume_tx_port->list, |
| 2986 | &rport_ptr->resume_tx_port_list); |
| 2987 | check_timeo: |
| 2988 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2989 | if (!timeout) { |
| 2990 | return -EAGAIN; |
| 2991 | } else if (timeout < 0) { |
| 2992 | ret = |
| 2993 | wait_event_interruptible(src->port_tx_wait_q, |
| 2994 | (rport_ptr->tx_quota_cnt != |
| 2995 | IPC_ROUTER_HIGH_RX_QUOTA || |
| 2996 | rport_ptr->status == RESET)); |
| 2997 | if (ret) |
| 2998 | return ret; |
| 2999 | } else { |
| 3000 | ret = wait_event_interruptible_timeout( |
| 3001 | src->port_tx_wait_q, |
| 3002 | (rport_ptr->tx_quota_cnt != |
| 3003 | IPC_ROUTER_HIGH_RX_QUOTA || |
| 3004 | rport_ptr->status == RESET), |
| 3005 | msecs_to_jiffies(timeout)); |
| 3006 | if (ret < 0) { |
| 3007 | return ret; |
| 3008 | } else if (ret == 0) { |
| 3009 | IPC_RTR_ERR("%s: Resume_tx Timeout %08x:%08x\n", |
| 3010 | __func__, rport_ptr->node_id, |
| 3011 | rport_ptr->port_id); |
| 3012 | return -ETIMEDOUT; |
| 3013 | } |
| 3014 | } |
| 3015 | } |
| 3016 | rport_ptr->tx_quota_cnt++; |
| 3017 | if (rport_ptr->tx_quota_cnt == IPC_ROUTER_LOW_RX_QUOTA) |
| 3018 | *set_confirm_rx = 1; |
| 3019 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 3020 | return 0; |
| 3021 | } |
| 3022 | |
| 3023 | static int |
| 3024 | msm_ipc_router_write_pkt(struct msm_ipc_port *src, |
| 3025 | struct msm_ipc_router_remote_port *rport_ptr, |
| 3026 | struct rr_packet *pkt, long timeout) |
| 3027 | { |
| 3028 | struct rr_header_v1 *hdr; |
| 3029 | struct msm_ipc_router_xprt_info *xprt_info; |
| 3030 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3031 | struct sk_buff *temp_skb; |
| 3032 | int xprt_option; |
| 3033 | int ret; |
| 3034 | int align_size; |
| 3035 | u32 set_confirm_rx = 0; |
| 3036 | |
| 3037 | if (!rport_ptr || !src || !pkt) |
| 3038 | return -EINVAL; |
| 3039 | |
| 3040 | hdr = &pkt->hdr; |
| 3041 | hdr->version = IPC_ROUTER_V1; |
| 3042 | hdr->type = IPC_ROUTER_CTRL_CMD_DATA; |
| 3043 | hdr->src_node_id = src->this_port.node_id; |
| 3044 | hdr->src_port_id = src->this_port.port_id; |
| 3045 | hdr->size = pkt->length; |
| 3046 | hdr->control_flag = 0; |
| 3047 | hdr->dst_node_id = rport_ptr->node_id; |
| 3048 | hdr->dst_port_id = rport_ptr->port_id; |
| 3049 | |
| 3050 | ret = ipc_router_tx_wait(src, rport_ptr, &set_confirm_rx, timeout); |
| 3051 | if (ret < 0) |
| 3052 | return ret; |
| 3053 | if (set_confirm_rx) |
| 3054 | hdr->control_flag |= CONTROL_FLAG_CONFIRM_RX; |
| 3055 | |
| 3056 | if (hdr->dst_node_id == IPC_ROUTER_NID_LOCAL) { |
| 3057 | ipc_router_log_msg(local_log_ctx, |
| 3058 | IPC_ROUTER_LOG_EVENT_TX, pkt, hdr, src, |
| 3059 | rport_ptr); |
| 3060 | ret = loopback_data(src, hdr->dst_port_id, pkt); |
| 3061 | return ret; |
| 3062 | } |
| 3063 | |
| 3064 | rt_entry = ipc_router_get_rtentry_ref(hdr->dst_node_id); |
| 3065 | if (!rt_entry) { |
| 3066 | IPC_RTR_ERR("%s: Remote node %d not up\n", |
| 3067 | __func__, hdr->dst_node_id); |
| 3068 | return -ENODEV; |
| 3069 | } |
| 3070 | down_read(&rt_entry->lock_lha4); |
| 3071 | xprt_info = rt_entry->xprt_info; |
| 3072 | ret = ipc_router_get_xprt_info_ref(xprt_info); |
| 3073 | if (ret < 0) { |
| 3074 | IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| 3075 | up_read(&rt_entry->lock_lha4); |
| 3076 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3077 | return ret; |
| 3078 | } |
| 3079 | ret = prepend_header(pkt, xprt_info); |
| 3080 | if (ret < 0) { |
| 3081 | IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| 3082 | goto out_write_pkt; |
| 3083 | } |
| 3084 | xprt_option = xprt_info->xprt->get_option(xprt_info->xprt); |
| 3085 | if (!(xprt_option & FRAG_PKT_WRITE_ENABLE)) { |
| 3086 | ret = defragment_pkt(pkt); |
| 3087 | if (ret < 0) |
| 3088 | goto out_write_pkt; |
| 3089 | } |
| 3090 | |
| 3091 | temp_skb = skb_peek_tail(pkt->pkt_fragment_q); |
| 3092 | align_size = ALIGN_SIZE(pkt->length); |
| 3093 | skb_put(temp_skb, align_size); |
| 3094 | pkt->length += align_size; |
| 3095 | mutex_lock(&xprt_info->tx_lock_lhb2); |
| 3096 | ret = xprt_info->xprt->write(pkt, pkt->length, xprt_info->xprt); |
| 3097 | mutex_unlock(&xprt_info->tx_lock_lhb2); |
| 3098 | out_write_pkt: |
| 3099 | up_read(&rt_entry->lock_lha4); |
| 3100 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3101 | |
| 3102 | if (ret < 0) { |
| 3103 | IPC_RTR_ERR("%s: Write on XPRT failed\n", __func__); |
| 3104 | ipc_router_log_msg(xprt_info->log_ctx, |
| 3105 | IPC_ROUTER_LOG_EVENT_TX_ERR, pkt, hdr, src, |
| 3106 | rport_ptr); |
| 3107 | |
| 3108 | ipc_router_put_xprt_info_ref(xprt_info); |
| 3109 | return ret; |
| 3110 | } |
| 3111 | update_comm_mode_info(&src->mode_info, xprt_info); |
| 3112 | ipc_router_log_msg(xprt_info->log_ctx, |
| 3113 | IPC_ROUTER_LOG_EVENT_TX, pkt, hdr, src, rport_ptr); |
| 3114 | |
| 3115 | ipc_router_put_xprt_info_ref(xprt_info); |
| 3116 | return hdr->size; |
| 3117 | } |
| 3118 | |
| 3119 | int msm_ipc_router_send_to(struct msm_ipc_port *src, |
| 3120 | struct sk_buff_head *data, |
| 3121 | struct msm_ipc_addr *dest, |
| 3122 | long timeout) |
| 3123 | { |
| 3124 | u32 dst_node_id = 0, dst_port_id = 0; |
| 3125 | struct msm_ipc_server *server; |
| 3126 | struct msm_ipc_server_port *server_port; |
| 3127 | struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| 3128 | struct msm_ipc_router_remote_port *src_rport_ptr = NULL; |
| 3129 | struct rr_packet *pkt; |
| 3130 | int ret; |
| 3131 | |
| 3132 | if (!src || !data || !dest) { |
| 3133 | IPC_RTR_ERR("%s: Invalid Parameters\n", __func__); |
| 3134 | return -EINVAL; |
| 3135 | } |
| 3136 | |
| 3137 | /* Resolve Address*/ |
| 3138 | if (dest->addrtype == MSM_IPC_ADDR_ID) { |
| 3139 | dst_node_id = dest->addr.port_addr.node_id; |
| 3140 | dst_port_id = dest->addr.port_addr.port_id; |
| 3141 | } else if (dest->addrtype == MSM_IPC_ADDR_NAME) { |
| 3142 | server = |
| 3143 | ipc_router_get_server_ref(dest->addr.port_name.service, |
| 3144 | dest->addr.port_name.instance, |
| 3145 | 0, 0); |
| 3146 | if (!server) { |
| 3147 | IPC_RTR_ERR("%s: Destination not reachable\n", |
| 3148 | __func__); |
| 3149 | return -ENODEV; |
| 3150 | } |
| 3151 | server_port = list_first_entry(&server->server_port_list, |
| 3152 | struct msm_ipc_server_port, |
| 3153 | list); |
| 3154 | dst_node_id = server_port->server_addr.node_id; |
| 3155 | dst_port_id = server_port->server_addr.port_id; |
| 3156 | kref_put(&server->ref, ipc_router_release_server); |
| 3157 | } |
| 3158 | |
| 3159 | rport_ptr = ipc_router_get_rport_ref(dst_node_id, dst_port_id); |
| 3160 | if (!rport_ptr) { |
| 3161 | IPC_RTR_ERR("%s: Remote port not found\n", __func__); |
| 3162 | return -ENODEV; |
| 3163 | } |
| 3164 | |
| 3165 | if (src->check_send_permissions) { |
| 3166 | ret = src->check_send_permissions(rport_ptr->sec_rule); |
| 3167 | if (ret <= 0) { |
| 3168 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3169 | IPC_RTR_ERR("%s: permission failure for %s\n", |
| 3170 | __func__, current->comm); |
| 3171 | return -EPERM; |
| 3172 | } |
| 3173 | } |
| 3174 | |
| 3175 | if (dst_node_id == IPC_ROUTER_NID_LOCAL && !src->rport_info) { |
| 3176 | src_rport_ptr = ipc_router_create_rport(IPC_ROUTER_NID_LOCAL, |
| 3177 | src->this_port.port_id, |
| 3178 | NULL); |
| 3179 | if (!src_rport_ptr) { |
| 3180 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3181 | IPC_RTR_ERR("%s: RPort creation failed\n", __func__); |
| 3182 | return -ENOMEM; |
| 3183 | } |
| 3184 | mutex_lock(&src->port_lock_lhc3); |
| 3185 | src->rport_info = src_rport_ptr; |
| 3186 | mutex_unlock(&src->port_lock_lhc3); |
| 3187 | kref_put(&src_rport_ptr->ref, ipc_router_release_rport); |
| 3188 | } |
| 3189 | |
| 3190 | pkt = create_pkt(data); |
| 3191 | if (!pkt) { |
| 3192 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3193 | IPC_RTR_ERR("%s: Pkt creation failed\n", __func__); |
| 3194 | return -ENOMEM; |
| 3195 | } |
| 3196 | |
| 3197 | ret = msm_ipc_router_write_pkt(src, rport_ptr, pkt, timeout); |
| 3198 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3199 | if (ret < 0) |
| 3200 | pkt->pkt_fragment_q = NULL; |
| 3201 | release_pkt(pkt); |
| 3202 | |
| 3203 | return ret; |
| 3204 | } |
| 3205 | |
| 3206 | int msm_ipc_router_send_msg(struct msm_ipc_port *src, |
| 3207 | struct msm_ipc_addr *dest, |
| 3208 | void *data, unsigned int data_len) |
| 3209 | { |
| 3210 | struct sk_buff_head *out_skb_head; |
| 3211 | int ret; |
| 3212 | |
| 3213 | out_skb_head = msm_ipc_router_buf_to_skb(data, data_len); |
| 3214 | if (!out_skb_head) { |
| 3215 | IPC_RTR_ERR("%s: SKB conversion failed\n", __func__); |
| 3216 | return -EFAULT; |
| 3217 | } |
| 3218 | |
| 3219 | ret = msm_ipc_router_send_to(src, out_skb_head, dest, 0); |
| 3220 | if (ret < 0) { |
| 3221 | if (ret != -EAGAIN) |
| 3222 | IPC_RTR_ERR( |
| 3223 | "%s: msm_ipc_router_send_to failed - ret: %d\n", |
| 3224 | __func__, ret); |
| 3225 | msm_ipc_router_free_skb(out_skb_head); |
| 3226 | return ret; |
| 3227 | } |
| 3228 | return 0; |
| 3229 | } |
| 3230 | |
| 3231 | /** |
| 3232 | * msm_ipc_router_send_resume_tx() - Send Resume_Tx message |
| 3233 | * @data: Pointer to received data packet that has confirm_rx bit set |
| 3234 | * |
| 3235 | * @return: On success, number of bytes transferred is returned, else |
| 3236 | * standard linux error code is returned. |
| 3237 | * |
| 3238 | * This function sends the Resume_Tx event to the remote node that |
| 3239 | * sent the data with confirm_rx field set. In case of a multi-hop |
| 3240 | * scenario also, this function makes sure that the destination node_id |
| 3241 | * to which the resume_tx event should reach is right. |
| 3242 | */ |
| 3243 | static int msm_ipc_router_send_resume_tx(void *data) |
| 3244 | { |
| 3245 | union rr_control_msg msg; |
| 3246 | struct rr_header_v1 *hdr = (struct rr_header_v1 *)data; |
| 3247 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3248 | int ret; |
| 3249 | |
| 3250 | memset(&msg, 0, sizeof(msg)); |
| 3251 | msg.cmd = IPC_ROUTER_CTRL_CMD_RESUME_TX; |
| 3252 | msg.cli.node_id = hdr->dst_node_id; |
| 3253 | msg.cli.port_id = hdr->dst_port_id; |
| 3254 | rt_entry = ipc_router_get_rtentry_ref(hdr->src_node_id); |
| 3255 | if (!rt_entry) { |
| 3256 | IPC_RTR_ERR("%s: %d Node is not present", __func__, |
| 3257 | hdr->src_node_id); |
| 3258 | return -ENODEV; |
| 3259 | } |
| 3260 | ret = ipc_router_get_xprt_info_ref(rt_entry->xprt_info); |
| 3261 | if (ret < 0) { |
| 3262 | IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| 3263 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3264 | return ret; |
| 3265 | } |
| 3266 | ret = ipc_router_send_ctl_msg(rt_entry->xprt_info, &msg, |
| 3267 | hdr->src_node_id); |
| 3268 | ipc_router_put_xprt_info_ref(rt_entry->xprt_info); |
| 3269 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3270 | if (ret < 0) |
| 3271 | IPC_RTR_ERR( |
| 3272 | "%s: Send Resume_Tx Failed SRC_NODE: %d SRC_PORT: %d DEST_NODE: %d", |
| 3273 | __func__, hdr->dst_node_id, hdr->dst_port_id, |
| 3274 | hdr->src_node_id); |
| 3275 | |
| 3276 | return ret; |
| 3277 | } |
| 3278 | |
| 3279 | int msm_ipc_router_read(struct msm_ipc_port *port_ptr, |
| 3280 | struct rr_packet **read_pkt, |
| 3281 | size_t buf_len) |
| 3282 | { |
| 3283 | struct rr_packet *pkt; |
| 3284 | |
| 3285 | if (!port_ptr || !read_pkt) |
| 3286 | return -EINVAL; |
| 3287 | |
| 3288 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3289 | if (list_empty(&port_ptr->port_rx_q)) { |
| 3290 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3291 | return -EAGAIN; |
| 3292 | } |
| 3293 | |
| 3294 | pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, list); |
| 3295 | if ((buf_len) && (pkt->hdr.size > buf_len)) { |
| 3296 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3297 | return -ETOOSMALL; |
| 3298 | } |
| 3299 | list_del(&pkt->list); |
| 3300 | if (list_empty(&port_ptr->port_rx_q)) |
| 3301 | __pm_relax(port_ptr->port_rx_ws); |
| 3302 | *read_pkt = pkt; |
| 3303 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3304 | if (pkt->hdr.control_flag & CONTROL_FLAG_CONFIRM_RX) |
| 3305 | msm_ipc_router_send_resume_tx(&pkt->hdr); |
| 3306 | |
| 3307 | return pkt->length; |
| 3308 | } |
| 3309 | |
| 3310 | /** |
| 3311 | * msm_ipc_router_rx_data_wait() - Wait for new message destined to a local |
| 3312 | * port. |
| 3313 | * @port_ptr: Pointer to the local port |
| 3314 | * @timeout: < 0 timeout indicates infinite wait till a message arrives. |
| 3315 | * > 0 timeout indicates the wait time. |
| 3316 | * 0 indicates that we do not wait. |
| 3317 | * @return: 0 if there are pending messages to read, |
| 3318 | * standard Linux error code otherwise. |
| 3319 | * |
| 3320 | * Checks for the availability of messages that are destined to a local port. |
| 3321 | * If no messages are present then waits as per @timeout. |
| 3322 | */ |
| 3323 | int msm_ipc_router_rx_data_wait(struct msm_ipc_port *port_ptr, long timeout) |
| 3324 | { |
| 3325 | int ret = 0; |
| 3326 | |
| 3327 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3328 | while (list_empty(&port_ptr->port_rx_q)) { |
| 3329 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3330 | if (timeout < 0) { |
| 3331 | ret = wait_event_interruptible( |
| 3332 | port_ptr->port_rx_wait_q, |
| 3333 | !list_empty(&port_ptr->port_rx_q)); |
| 3334 | if (ret) |
| 3335 | return ret; |
| 3336 | } else if (timeout > 0) { |
| 3337 | timeout = wait_event_interruptible_timeout( |
| 3338 | port_ptr->port_rx_wait_q, |
| 3339 | !list_empty(&port_ptr->port_rx_q), |
| 3340 | timeout); |
| 3341 | if (timeout < 0) |
| 3342 | return -EFAULT; |
| 3343 | } |
| 3344 | if (timeout == 0) |
| 3345 | return -ENOMSG; |
| 3346 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3347 | } |
| 3348 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3349 | |
| 3350 | return ret; |
| 3351 | } |
| 3352 | |
| 3353 | /** |
| 3354 | * msm_ipc_router_recv_from() - Receive messages destined to a local port. |
| 3355 | * @port_ptr: Pointer to the local port |
| 3356 | * @pkt : Pointer to the router-to-router packet |
| 3357 | * @src: Pointer to local port address |
| 3358 | * @timeout: < 0 timeout indicates infinite wait till a message arrives. |
| 3359 | * > 0 timeout indicates the wait time. |
| 3360 | * 0 indicates that we do not wait. |
| 3361 | * @return: = Number of bytes read(On successful read operation). |
| 3362 | * = -ENOMSG (If there are no pending messages and timeout is 0). |
| 3363 | * = -EINVAL (If either of the arguments, port_ptr or data is invalid) |
| 3364 | * = -EFAULT (If there are no pending messages when timeout is > 0 |
| 3365 | * and the wait_event_interruptible_timeout has returned value > 0) |
| 3366 | * = -ERESTARTSYS (If there are no pending messages when timeout |
| 3367 | * is < 0 and wait_event_interruptible was interrupted by a signal) |
| 3368 | * |
| 3369 | * This function reads the messages that are destined for a local port. It |
| 3370 | * is used by modules that exist with-in the kernel and use IPC Router for |
| 3371 | * transport. The function checks if there are any messages that are already |
| 3372 | * received. If yes, it reads them, else it waits as per the timeout value. |
| 3373 | * On a successful read, the return value of the function indicates the number |
| 3374 | * of bytes that are read. |
| 3375 | */ |
| 3376 | int msm_ipc_router_recv_from(struct msm_ipc_port *port_ptr, |
| 3377 | struct rr_packet **pkt, |
| 3378 | struct msm_ipc_addr *src, |
| 3379 | long timeout) |
| 3380 | { |
| 3381 | int ret, data_len, align_size; |
| 3382 | struct sk_buff *temp_skb; |
| 3383 | struct rr_header_v1 *hdr = NULL; |
| 3384 | |
| 3385 | if (!port_ptr || !pkt) { |
| 3386 | IPC_RTR_ERR("%s: Invalid pointers being passed\n", __func__); |
| 3387 | return -EINVAL; |
| 3388 | } |
| 3389 | |
| 3390 | *pkt = NULL; |
| 3391 | |
| 3392 | ret = msm_ipc_router_rx_data_wait(port_ptr, timeout); |
| 3393 | if (ret) |
| 3394 | return ret; |
| 3395 | |
| 3396 | ret = msm_ipc_router_read(port_ptr, pkt, 0); |
| 3397 | if (ret <= 0 || !(*pkt)) |
| 3398 | return ret; |
| 3399 | |
| 3400 | hdr = &((*pkt)->hdr); |
| 3401 | if (src) { |
| 3402 | src->addrtype = MSM_IPC_ADDR_ID; |
| 3403 | src->addr.port_addr.node_id = hdr->src_node_id; |
| 3404 | src->addr.port_addr.port_id = hdr->src_port_id; |
| 3405 | } |
| 3406 | |
| 3407 | data_len = hdr->size; |
| 3408 | align_size = ALIGN_SIZE(data_len); |
| 3409 | if (align_size) { |
| 3410 | temp_skb = skb_peek_tail((*pkt)->pkt_fragment_q); |
| 3411 | skb_trim(temp_skb, (temp_skb->len - align_size)); |
| 3412 | } |
| 3413 | return data_len; |
| 3414 | } |
| 3415 | |
| 3416 | int msm_ipc_router_read_msg(struct msm_ipc_port *port_ptr, |
| 3417 | struct msm_ipc_addr *src, |
| 3418 | unsigned char **data, |
| 3419 | unsigned int *len) |
| 3420 | { |
| 3421 | struct rr_packet *pkt; |
| 3422 | int ret; |
| 3423 | |
| 3424 | ret = msm_ipc_router_recv_from(port_ptr, &pkt, src, 0); |
| 3425 | if (ret < 0) { |
| 3426 | if (ret != -ENOMSG) |
| 3427 | IPC_RTR_ERR( |
| 3428 | "%s: msm_ipc_router_recv_from failed - ret: %d\n", |
| 3429 | __func__, ret); |
| 3430 | return ret; |
| 3431 | } |
| 3432 | |
| 3433 | *data = msm_ipc_router_skb_to_buf(pkt->pkt_fragment_q, ret); |
| 3434 | if (!(*data)) { |
| 3435 | IPC_RTR_ERR("%s: Buf conversion failed\n", __func__); |
| 3436 | release_pkt(pkt); |
| 3437 | return -ENOMEM; |
| 3438 | } |
| 3439 | |
| 3440 | *len = ret; |
| 3441 | release_pkt(pkt); |
| 3442 | return 0; |
| 3443 | } |
| 3444 | |
| 3445 | /** |
| 3446 | * msm_ipc_router_create_port() - Create a IPC Router port/endpoint |
| 3447 | * @notify: Callback function to notify any event on the port. |
| 3448 | * @event: Event ID to be handled. |
| 3449 | * @oob_data: Any out-of-band data associated with the event. |
| 3450 | * @oob_data_len: Size of the out-of-band data, if valid. |
| 3451 | * @priv: Private data registered during the port creation. |
| 3452 | * @priv: Private info to be passed while the notification is generated. |
| 3453 | * |
| 3454 | * @return: Pointer to the port on success, NULL on error. |
| 3455 | */ |
| 3456 | struct msm_ipc_port *msm_ipc_router_create_port( |
| 3457 | void (*notify)(unsigned int event, void *oob_data, |
| 3458 | size_t oob_data_len, void *priv), |
| 3459 | void *priv) |
| 3460 | { |
| 3461 | struct msm_ipc_port *port_ptr; |
| 3462 | int ret; |
| 3463 | |
| 3464 | ret = ipc_router_core_init(); |
| 3465 | if (ret < 0) { |
| 3466 | IPC_RTR_ERR("%s: Error %d initializing IPC Router\n", |
| 3467 | __func__, ret); |
| 3468 | return NULL; |
| 3469 | } |
| 3470 | |
| 3471 | port_ptr = msm_ipc_router_create_raw_port(NULL, notify, priv); |
| 3472 | if (!port_ptr) |
| 3473 | IPC_RTR_ERR("%s: port_ptr alloc failed\n", __func__); |
| 3474 | |
| 3475 | return port_ptr; |
| 3476 | } |
| 3477 | |
| 3478 | int msm_ipc_router_close_port(struct msm_ipc_port *port_ptr) |
| 3479 | { |
| 3480 | union rr_control_msg msg; |
| 3481 | struct msm_ipc_server *server; |
| 3482 | struct msm_ipc_router_remote_port *rport_ptr; |
| 3483 | |
| 3484 | if (!port_ptr) |
| 3485 | return -EINVAL; |
| 3486 | |
| 3487 | if (port_ptr->type == SERVER_PORT || port_ptr->type == CLIENT_PORT) { |
| 3488 | down_write(&local_ports_lock_lhc2); |
| 3489 | list_del(&port_ptr->list); |
| 3490 | up_write(&local_ports_lock_lhc2); |
| 3491 | |
| 3492 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 3493 | rport_ptr = (struct msm_ipc_router_remote_port *) |
| 3494 | port_ptr->rport_info; |
| 3495 | port_ptr->rport_info = NULL; |
| 3496 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 3497 | if (rport_ptr) { |
| 3498 | ipc_router_reset_conn(rport_ptr); |
| 3499 | ipc_router_destroy_rport(rport_ptr); |
| 3500 | } |
| 3501 | |
| 3502 | if (port_ptr->type == SERVER_PORT) { |
| 3503 | memset(&msg, 0, sizeof(msg)); |
| 3504 | msg.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| 3505 | msg.srv.service = port_ptr->port_name.service; |
| 3506 | msg.srv.instance = port_ptr->port_name.instance; |
| 3507 | msg.srv.node_id = port_ptr->this_port.node_id; |
| 3508 | msg.srv.port_id = port_ptr->this_port.port_id; |
| 3509 | broadcast_ctl_msg(&msg); |
| 3510 | } |
| 3511 | |
| 3512 | /* Server port could have been a client port earlier. |
| 3513 | * Send REMOVE_CLIENT message in either case. |
| 3514 | */ |
| 3515 | msm_ipc_router_send_remove_client(&port_ptr->mode_info, |
| 3516 | port_ptr->this_port.node_id, |
| 3517 | port_ptr->this_port.port_id); |
| 3518 | } else if (port_ptr->type == CONTROL_PORT) { |
| 3519 | down_write(&control_ports_lock_lha5); |
| 3520 | list_del(&port_ptr->list); |
| 3521 | up_write(&control_ports_lock_lha5); |
| 3522 | } else if (port_ptr->type == IRSC_PORT) { |
| 3523 | down_write(&local_ports_lock_lhc2); |
| 3524 | list_del(&port_ptr->list); |
| 3525 | up_write(&local_ports_lock_lhc2); |
| 3526 | signal_irsc_completion(); |
| 3527 | } |
| 3528 | |
| 3529 | if (port_ptr->type == SERVER_PORT) { |
| 3530 | server = ipc_router_get_server_ref( |
| 3531 | port_ptr->port_name.service, |
| 3532 | port_ptr->port_name.instance, |
| 3533 | port_ptr->this_port.node_id, |
| 3534 | port_ptr->this_port.port_id); |
| 3535 | if (server) { |
| 3536 | kref_put(&server->ref, ipc_router_release_server); |
| 3537 | ipc_router_destroy_server(server, |
| 3538 | port_ptr->this_port.node_id, |
| 3539 | port_ptr->this_port.port_id); |
| 3540 | } |
| 3541 | } |
| 3542 | |
| 3543 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 3544 | rport_ptr = (struct msm_ipc_router_remote_port *)port_ptr->rport_info; |
| 3545 | port_ptr->rport_info = NULL; |
| 3546 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 3547 | if (rport_ptr) |
| 3548 | ipc_router_destroy_rport(rport_ptr); |
| 3549 | |
| 3550 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 3551 | return 0; |
| 3552 | } |
| 3553 | |
| 3554 | int msm_ipc_router_get_curr_pkt_size(struct msm_ipc_port *port_ptr) |
| 3555 | { |
| 3556 | struct rr_packet *pkt; |
| 3557 | int rc = 0; |
| 3558 | |
| 3559 | if (!port_ptr) |
| 3560 | return -EINVAL; |
| 3561 | |
| 3562 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3563 | if (!list_empty(&port_ptr->port_rx_q)) { |
| 3564 | pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, |
| 3565 | list); |
| 3566 | rc = pkt->hdr.size; |
| 3567 | } |
| 3568 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3569 | |
| 3570 | return rc; |
| 3571 | } |
| 3572 | |
| 3573 | int msm_ipc_router_bind_control_port(struct msm_ipc_port *port_ptr) |
| 3574 | { |
| 3575 | if (unlikely(!port_ptr || port_ptr->type != CLIENT_PORT)) |
| 3576 | return -EINVAL; |
| 3577 | |
| 3578 | down_write(&local_ports_lock_lhc2); |
| 3579 | list_del(&port_ptr->list); |
| 3580 | up_write(&local_ports_lock_lhc2); |
| 3581 | port_ptr->type = CONTROL_PORT; |
| 3582 | down_write(&control_ports_lock_lha5); |
| 3583 | list_add_tail(&port_ptr->list, &control_ports); |
| 3584 | up_write(&control_ports_lock_lha5); |
| 3585 | |
| 3586 | return 0; |
| 3587 | } |
| 3588 | |
| 3589 | int msm_ipc_router_lookup_server_name(struct msm_ipc_port_name *srv_name, |
| 3590 | struct msm_ipc_server_info *srv_info, |
| 3591 | int num_entries_in_array, u32 lookup_mask) |
| 3592 | { |
| 3593 | struct msm_ipc_server *server; |
| 3594 | struct msm_ipc_server_port *server_port; |
| 3595 | int key, i = 0; /*num_entries_found*/ |
| 3596 | |
| 3597 | if (!srv_name) { |
| 3598 | IPC_RTR_ERR("%s: Invalid srv_name\n", __func__); |
| 3599 | return -EINVAL; |
| 3600 | } |
| 3601 | |
| 3602 | if (num_entries_in_array && !srv_info) { |
| 3603 | IPC_RTR_ERR("%s: srv_info NULL\n", __func__); |
| 3604 | return -EINVAL; |
| 3605 | } |
| 3606 | |
| 3607 | down_read(&server_list_lock_lha2); |
| 3608 | key = (srv_name->service & (SRV_HASH_SIZE - 1)); |
| 3609 | list_for_each_entry(server, &server_list[key], list) { |
| 3610 | if ((server->name.service != srv_name->service) || |
| 3611 | ((server->name.instance & lookup_mask) != |
| 3612 | srv_name->instance)) |
| 3613 | continue; |
| 3614 | |
| 3615 | list_for_each_entry(server_port, &server->server_port_list, |
| 3616 | list) { |
| 3617 | if (i < num_entries_in_array) { |
| 3618 | srv_info[i].node_id = |
| 3619 | server_port->server_addr.node_id; |
| 3620 | srv_info[i].port_id = |
| 3621 | server_port->server_addr.port_id; |
| 3622 | srv_info[i].service = server->name.service; |
| 3623 | srv_info[i].instance = server->name.instance; |
| 3624 | } |
| 3625 | i++; |
| 3626 | } |
| 3627 | } |
| 3628 | up_read(&server_list_lock_lha2); |
| 3629 | |
| 3630 | return i; |
| 3631 | } |
| 3632 | |
| 3633 | int msm_ipc_router_close(void) |
| 3634 | { |
| 3635 | struct msm_ipc_router_xprt_info *xprt_info, *tmp_xprt_info; |
| 3636 | |
| 3637 | down_write(&xprt_info_list_lock_lha5); |
| 3638 | list_for_each_entry_safe(xprt_info, tmp_xprt_info, |
| 3639 | &xprt_info_list, list) { |
| 3640 | xprt_info->xprt->close(xprt_info->xprt); |
| 3641 | list_del(&xprt_info->list); |
| 3642 | kfree(xprt_info); |
| 3643 | } |
| 3644 | up_write(&xprt_info_list_lock_lha5); |
| 3645 | return 0; |
| 3646 | } |
| 3647 | |
| 3648 | /** |
| 3649 | * pil_vote_load_worker() - Process vote to load the modem |
| 3650 | * |
| 3651 | * @work: Work item to process |
| 3652 | * |
| 3653 | * This function is called to process votes to load the modem that have been |
| 3654 | * queued by msm_ipc_load_default_node(). |
| 3655 | */ |
| 3656 | static void pil_vote_load_worker(struct work_struct *work) |
| 3657 | { |
| 3658 | struct pil_vote_info *vote_info; |
| 3659 | |
| 3660 | vote_info = container_of(work, struct pil_vote_info, load_work); |
| 3661 | if (strlen(default_peripheral)) { |
| 3662 | vote_info->pil_handle = subsystem_get(default_peripheral); |
| 3663 | if (IS_ERR(vote_info->pil_handle)) { |
| 3664 | IPC_RTR_ERR("%s: Failed to load %s\n", |
| 3665 | __func__, default_peripheral); |
| 3666 | vote_info->pil_handle = NULL; |
| 3667 | } |
| 3668 | } else { |
| 3669 | vote_info->pil_handle = NULL; |
| 3670 | } |
| 3671 | } |
| 3672 | |
| 3673 | /** |
| 3674 | * pil_vote_unload_worker() - Process vote to unload the modem |
| 3675 | * |
| 3676 | * @work: Work item to process |
| 3677 | * |
| 3678 | * This function is called to process votes to unload the modem that have been |
| 3679 | * queued by msm_ipc_unload_default_node(). |
| 3680 | */ |
| 3681 | static void pil_vote_unload_worker(struct work_struct *work) |
| 3682 | { |
| 3683 | struct pil_vote_info *vote_info; |
| 3684 | |
| 3685 | vote_info = container_of(work, struct pil_vote_info, unload_work); |
| 3686 | |
| 3687 | if (vote_info->pil_handle) { |
| 3688 | subsystem_put(vote_info->pil_handle); |
| 3689 | vote_info->pil_handle = NULL; |
| 3690 | } |
| 3691 | kfree(vote_info); |
| 3692 | } |
| 3693 | |
| 3694 | /** |
| 3695 | * msm_ipc_load_default_node() - Queue a vote to load the modem. |
| 3696 | * |
| 3697 | * @return: PIL vote info structure on success, NULL on failure. |
| 3698 | * |
| 3699 | * This function places a work item that loads the modem on the |
| 3700 | * single-threaded workqueue used for processing PIL votes to load |
| 3701 | * or unload the modem. |
| 3702 | */ |
| 3703 | void *msm_ipc_load_default_node(void) |
| 3704 | { |
| 3705 | struct pil_vote_info *vote_info; |
| 3706 | |
| 3707 | vote_info = kmalloc(sizeof(*vote_info), GFP_KERNEL); |
| 3708 | if (!vote_info) |
| 3709 | return vote_info; |
| 3710 | |
| 3711 | INIT_WORK(&vote_info->load_work, pil_vote_load_worker); |
| 3712 | queue_work(msm_ipc_router_workqueue, &vote_info->load_work); |
| 3713 | |
| 3714 | return vote_info; |
| 3715 | } |
| 3716 | |
| 3717 | /** |
| 3718 | * msm_ipc_unload_default_node() - Queue a vote to unload the modem. |
| 3719 | * |
| 3720 | * @pil_vote: PIL vote info structure, containing the PIL handle |
| 3721 | * and work structure. |
| 3722 | * |
| 3723 | * This function places a work item that unloads the modem on the |
| 3724 | * single-threaded workqueue used for processing PIL votes to load |
| 3725 | * or unload the modem. |
| 3726 | */ |
| 3727 | void msm_ipc_unload_default_node(void *pil_vote) |
| 3728 | { |
| 3729 | struct pil_vote_info *vote_info; |
| 3730 | |
| 3731 | if (pil_vote) { |
| 3732 | vote_info = (struct pil_vote_info *)pil_vote; |
| 3733 | INIT_WORK(&vote_info->unload_work, pil_vote_unload_worker); |
| 3734 | queue_work(msm_ipc_router_workqueue, &vote_info->unload_work); |
| 3735 | } |
| 3736 | } |
| 3737 | |
| 3738 | #if defined(CONFIG_DEBUG_FS) |
| 3739 | static void dump_routing_table(struct seq_file *s) |
| 3740 | { |
| 3741 | int j; |
| 3742 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3743 | |
| 3744 | seq_printf(s, "%-10s|%-20s|%-10s|\n", "Node Id", "XPRT Name", |
| 3745 | "Next Hop"); |
| 3746 | seq_puts(s, "----------------------------------------------\n"); |
| 3747 | for (j = 0; j < RT_HASH_SIZE; j++) { |
| 3748 | down_read(&routing_table_lock_lha3); |
| 3749 | list_for_each_entry(rt_entry, &routing_table[j], list) { |
| 3750 | down_read(&rt_entry->lock_lha4); |
| 3751 | seq_printf(s, "0x%08x|", rt_entry->node_id); |
| 3752 | if (rt_entry->node_id == IPC_ROUTER_NID_LOCAL) |
| 3753 | seq_printf(s, "%-20s|0x%08x|\n", "Loopback", |
| 3754 | rt_entry->node_id); |
| 3755 | else |
| 3756 | seq_printf(s, "%-20s|0x%08x|\n", |
| 3757 | rt_entry->xprt_info->xprt->name, |
| 3758 | rt_entry->node_id); |
| 3759 | up_read(&rt_entry->lock_lha4); |
| 3760 | } |
| 3761 | up_read(&routing_table_lock_lha3); |
| 3762 | } |
| 3763 | } |
| 3764 | |
| 3765 | static void dump_xprt_info(struct seq_file *s) |
| 3766 | { |
| 3767 | struct msm_ipc_router_xprt_info *xprt_info; |
| 3768 | |
| 3769 | seq_printf(s, "%-20s|%-10s|%-12s|%-15s|\n", "XPRT Name", "Link ID", |
| 3770 | "Initialized", "Remote Node Id"); |
| 3771 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3772 | down_read(&xprt_info_list_lock_lha5); |
| 3773 | list_for_each_entry(xprt_info, &xprt_info_list, list) |
| 3774 | seq_printf(s, "%-20s|0x%08x|%-12s|0x%08x|\n", |
| 3775 | xprt_info->xprt->name, xprt_info->xprt->link_id, |
| 3776 | (xprt_info->initialized ? "Y" : "N"), |
| 3777 | xprt_info->remote_node_id); |
| 3778 | up_read(&xprt_info_list_lock_lha5); |
| 3779 | } |
| 3780 | |
| 3781 | static void dump_servers(struct seq_file *s) |
| 3782 | { |
| 3783 | int j; |
| 3784 | struct msm_ipc_server *server; |
| 3785 | struct msm_ipc_server_port *server_port; |
| 3786 | |
| 3787 | seq_printf(s, "%-11s|%-11s|%-11s|%-11s|\n", "Service", "Instance", |
| 3788 | "Node_id", "Port_id"); |
| 3789 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3790 | down_read(&server_list_lock_lha2); |
| 3791 | for (j = 0; j < SRV_HASH_SIZE; j++) { |
| 3792 | list_for_each_entry(server, &server_list[j], list) { |
| 3793 | list_for_each_entry(server_port, |
| 3794 | &server->server_port_list, |
| 3795 | list) |
| 3796 | seq_printf(s, "0x%08x |0x%08x |0x%08x |0x%08x |\n", |
| 3797 | server->name.service, |
| 3798 | server->name.instance, |
| 3799 | server_port->server_addr.node_id, |
| 3800 | server_port->server_addr.port_id); |
| 3801 | } |
| 3802 | } |
| 3803 | up_read(&server_list_lock_lha2); |
| 3804 | } |
| 3805 | |
| 3806 | static void dump_remote_ports(struct seq_file *s) |
| 3807 | { |
| 3808 | int j, k; |
| 3809 | struct msm_ipc_router_remote_port *rport_ptr; |
| 3810 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3811 | |
| 3812 | seq_printf(s, "%-11s|%-11s|%-10s|\n", "Node_id", "Port_id", |
| 3813 | "Quota_cnt"); |
| 3814 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3815 | for (j = 0; j < RT_HASH_SIZE; j++) { |
| 3816 | down_read(&routing_table_lock_lha3); |
| 3817 | list_for_each_entry(rt_entry, &routing_table[j], list) { |
| 3818 | down_read(&rt_entry->lock_lha4); |
| 3819 | for (k = 0; k < RP_HASH_SIZE; k++) { |
| 3820 | list_for_each_entry |
| 3821 | (rport_ptr, |
| 3822 | &rt_entry->remote_port_list[k], |
| 3823 | list) |
| 3824 | seq_printf(s, "0x%08x |0x%08x |0x%08x|\n", |
| 3825 | rport_ptr->node_id, |
| 3826 | rport_ptr->port_id, |
| 3827 | rport_ptr->tx_quota_cnt); |
| 3828 | } |
| 3829 | up_read(&rt_entry->lock_lha4); |
| 3830 | } |
| 3831 | up_read(&routing_table_lock_lha3); |
| 3832 | } |
| 3833 | } |
| 3834 | |
| 3835 | static void dump_control_ports(struct seq_file *s) |
| 3836 | { |
| 3837 | struct msm_ipc_port *port_ptr; |
| 3838 | |
| 3839 | seq_printf(s, "%-11s|%-11s|\n", "Node_id", "Port_id"); |
| 3840 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3841 | down_read(&control_ports_lock_lha5); |
| 3842 | list_for_each_entry(port_ptr, &control_ports, list) |
| 3843 | seq_printf(s, "0x%08x |0x%08x |\n", port_ptr->this_port.node_id, |
| 3844 | port_ptr->this_port.port_id); |
| 3845 | up_read(&control_ports_lock_lha5); |
| 3846 | } |
| 3847 | |
| 3848 | static void dump_local_ports(struct seq_file *s) |
| 3849 | { |
| 3850 | int j; |
| 3851 | struct msm_ipc_port *port_ptr; |
| 3852 | |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame^] | 3853 | seq_printf(s, "%-11s|%-11s|%-32s|%-11s|\n", |
| 3854 | "Node_id", "Port_id", "Wakelock", "Last SVCID"); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3855 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3856 | down_read(&local_ports_lock_lhc2); |
| 3857 | for (j = 0; j < LP_HASH_SIZE; j++) { |
| 3858 | list_for_each_entry(port_ptr, &local_ports[j], list) { |
| 3859 | mutex_lock(&port_ptr->port_lock_lhc3); |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame^] | 3860 | seq_printf(s, "0x%08x |0x%08x |%-32s|0x%08x |\n", |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3861 | port_ptr->this_port.node_id, |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame^] | 3862 | port_ptr->this_port.port_id, |
| 3863 | port_ptr->rx_ws_name, |
| 3864 | port_ptr->last_served_svc_id); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3865 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 3866 | } |
| 3867 | } |
| 3868 | up_read(&local_ports_lock_lhc2); |
| 3869 | } |
| 3870 | |
| 3871 | static int debugfs_show(struct seq_file *s, void *data) |
| 3872 | { |
| 3873 | void (*show)(struct seq_file *) = s->private; |
| 3874 | |
| 3875 | show(s); |
| 3876 | return 0; |
| 3877 | } |
| 3878 | |
| 3879 | static int debug_open(struct inode *inode, struct file *file) |
| 3880 | { |
| 3881 | return single_open(file, debugfs_show, inode->i_private); |
| 3882 | } |
| 3883 | |
| 3884 | static const struct file_operations debug_ops = { |
| 3885 | .open = debug_open, |
| 3886 | .release = single_release, |
| 3887 | .read = seq_read, |
| 3888 | .llseek = seq_lseek, |
| 3889 | }; |
| 3890 | |
| 3891 | static void debug_create(const char *name, struct dentry *dent, |
| 3892 | void (*show)(struct seq_file *)) |
| 3893 | { |
| 3894 | debugfs_create_file(name, 0444, dent, show, &debug_ops); |
| 3895 | } |
| 3896 | |
| 3897 | static void debugfs_init(void) |
| 3898 | { |
| 3899 | struct dentry *dent; |
| 3900 | |
| 3901 | dent = debugfs_create_dir("msm_ipc_router", 0); |
| 3902 | if (IS_ERR(dent)) |
| 3903 | return; |
| 3904 | |
| 3905 | debug_create("dump_local_ports", dent, dump_local_ports); |
| 3906 | debug_create("dump_remote_ports", dent, dump_remote_ports); |
| 3907 | debug_create("dump_control_ports", dent, dump_control_ports); |
| 3908 | debug_create("dump_servers", dent, dump_servers); |
| 3909 | debug_create("dump_xprt_info", dent, dump_xprt_info); |
| 3910 | debug_create("dump_routing_table", dent, dump_routing_table); |
| 3911 | } |
| 3912 | |
| 3913 | #else |
| 3914 | static void debugfs_init(void) {} |
| 3915 | #endif |
| 3916 | |
| 3917 | /** |
| 3918 | * ipc_router_create_log_ctx() - Create and add the log context based on |
| 3919 | * transport |
| 3920 | * @name: subsystem name |
| 3921 | * |
| 3922 | * Return: a reference to the log context created |
| 3923 | * |
| 3924 | * This function creates ipc log context based on transport and adds it to a |
| 3925 | * global list. This log context can be reused from the list in case of a |
| 3926 | * subsystem restart. |
| 3927 | */ |
| 3928 | static void *ipc_router_create_log_ctx(char *name) |
| 3929 | { |
| 3930 | struct ipc_rtr_log_ctx *sub_log_ctx; |
| 3931 | |
| 3932 | sub_log_ctx = kmalloc(sizeof(*sub_log_ctx), GFP_KERNEL); |
| 3933 | if (!sub_log_ctx) |
| 3934 | return NULL; |
| 3935 | sub_log_ctx->log_ctx = ipc_log_context_create( |
| 3936 | IPC_RTR_INFO_PAGES, name, 0); |
| 3937 | if (!sub_log_ctx->log_ctx) { |
| 3938 | IPC_RTR_ERR("%s: Unable to create IPC logging for [%s]", |
| 3939 | __func__, name); |
| 3940 | kfree(sub_log_ctx); |
| 3941 | return NULL; |
| 3942 | } |
| 3943 | strlcpy(sub_log_ctx->log_ctx_name, name, LOG_CTX_NAME_LEN); |
| 3944 | INIT_LIST_HEAD(&sub_log_ctx->list); |
| 3945 | list_add_tail(&sub_log_ctx->list, &log_ctx_list); |
| 3946 | return sub_log_ctx->log_ctx; |
| 3947 | } |
| 3948 | |
| 3949 | static void ipc_router_log_ctx_init(void) |
| 3950 | { |
| 3951 | mutex_lock(&log_ctx_list_lock_lha0); |
| 3952 | local_log_ctx = ipc_router_create_log_ctx("local_IPCRTR"); |
| 3953 | mutex_unlock(&log_ctx_list_lock_lha0); |
| 3954 | } |
| 3955 | |
| 3956 | /** |
| 3957 | * ipc_router_get_log_ctx() - Retrieves the ipc log context based on subsystem |
| 3958 | * name. |
| 3959 | * @sub_name: subsystem name |
| 3960 | * |
| 3961 | * Return: a reference to the log context |
| 3962 | */ |
| 3963 | static void *ipc_router_get_log_ctx(char *sub_name) |
| 3964 | { |
| 3965 | void *log_ctx = NULL; |
| 3966 | struct ipc_rtr_log_ctx *temp_log_ctx; |
| 3967 | |
| 3968 | mutex_lock(&log_ctx_list_lock_lha0); |
| 3969 | list_for_each_entry(temp_log_ctx, &log_ctx_list, list) |
| 3970 | if (!strcmp(temp_log_ctx->log_ctx_name, sub_name)) { |
| 3971 | log_ctx = temp_log_ctx->log_ctx; |
| 3972 | mutex_unlock(&log_ctx_list_lock_lha0); |
| 3973 | return log_ctx; |
| 3974 | } |
| 3975 | log_ctx = ipc_router_create_log_ctx(sub_name); |
| 3976 | mutex_unlock(&log_ctx_list_lock_lha0); |
| 3977 | |
| 3978 | return log_ctx; |
| 3979 | } |
| 3980 | |
| 3981 | /** |
| 3982 | * ipc_router_get_xprt_info_ref() - Get a reference to the xprt_info structure |
| 3983 | * @xprt_info: pointer to the xprt_info. |
| 3984 | * |
| 3985 | * @return: Zero on success, -ENODEV on failure. |
| 3986 | * |
| 3987 | * This function is used to obtain a reference to the xprt_info structure |
| 3988 | * corresponding to the requested @xprt_info pointer. |
| 3989 | */ |
| 3990 | static int ipc_router_get_xprt_info_ref( |
| 3991 | struct msm_ipc_router_xprt_info *xprt_info) |
| 3992 | { |
| 3993 | int ret = -ENODEV; |
| 3994 | struct msm_ipc_router_xprt_info *tmp_xprt_info; |
| 3995 | |
| 3996 | if (!xprt_info) |
| 3997 | return 0; |
| 3998 | |
| 3999 | down_read(&xprt_info_list_lock_lha5); |
| 4000 | list_for_each_entry(tmp_xprt_info, &xprt_info_list, list) { |
| 4001 | if (tmp_xprt_info == xprt_info) { |
| 4002 | kref_get(&xprt_info->ref); |
| 4003 | ret = 0; |
| 4004 | break; |
| 4005 | } |
| 4006 | } |
| 4007 | up_read(&xprt_info_list_lock_lha5); |
| 4008 | |
| 4009 | return ret; |
| 4010 | } |
| 4011 | |
| 4012 | /** |
| 4013 | * ipc_router_put_xprt_info_ref() - Put a reference to the xprt_info structure |
| 4014 | * @xprt_info: pointer to the xprt_info. |
| 4015 | * |
| 4016 | * This function is used to put the reference to the xprt_info structure |
| 4017 | * corresponding to the requested @xprt_info pointer. |
| 4018 | */ |
| 4019 | static void ipc_router_put_xprt_info_ref( |
| 4020 | struct msm_ipc_router_xprt_info *xprt_info) |
| 4021 | { |
| 4022 | if (xprt_info) |
| 4023 | kref_put(&xprt_info->ref, ipc_router_release_xprt_info_ref); |
| 4024 | } |
| 4025 | |
| 4026 | /** |
| 4027 | * ipc_router_release_xprt_info_ref() - release the xprt_info last reference |
| 4028 | * @ref: Reference to the xprt_info structure. |
| 4029 | * |
| 4030 | * This function is called when all references to the xprt_info structure |
| 4031 | * are released. |
| 4032 | */ |
| 4033 | static void ipc_router_release_xprt_info_ref(struct kref *ref) |
| 4034 | { |
| 4035 | struct msm_ipc_router_xprt_info *xprt_info = |
| 4036 | container_of(ref, struct msm_ipc_router_xprt_info, ref); |
| 4037 | |
| 4038 | complete_all(&xprt_info->ref_complete); |
| 4039 | } |
| 4040 | |
| 4041 | static int msm_ipc_router_add_xprt(struct msm_ipc_router_xprt *xprt) |
| 4042 | { |
| 4043 | struct msm_ipc_router_xprt_info *xprt_info; |
| 4044 | |
| 4045 | xprt_info = kmalloc(sizeof(*xprt_info), GFP_KERNEL); |
| 4046 | if (!xprt_info) |
| 4047 | return -ENOMEM; |
| 4048 | |
| 4049 | xprt_info->xprt = xprt; |
| 4050 | xprt_info->initialized = 0; |
| 4051 | xprt_info->remote_node_id = -1; |
| 4052 | INIT_LIST_HEAD(&xprt_info->pkt_list); |
| 4053 | mutex_init(&xprt_info->rx_lock_lhb2); |
| 4054 | mutex_init(&xprt_info->tx_lock_lhb2); |
| 4055 | wakeup_source_init(&xprt_info->ws, xprt->name); |
| 4056 | xprt_info->need_len = 0; |
| 4057 | xprt_info->abort_data_read = 0; |
| 4058 | INIT_WORK(&xprt_info->read_data, do_read_data); |
| 4059 | INIT_LIST_HEAD(&xprt_info->list); |
| 4060 | kref_init(&xprt_info->ref); |
| 4061 | init_completion(&xprt_info->ref_complete); |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4062 | xprt_info->dynamic_ws = 0; |
| 4063 | if (xprt->get_ws_info) |
| 4064 | xprt_info->dynamic_ws = xprt->get_ws_info(xprt); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4065 | |
| 4066 | xprt_info->workqueue = create_singlethread_workqueue(xprt->name); |
| 4067 | if (!xprt_info->workqueue) { |
| 4068 | kfree(xprt_info); |
| 4069 | return -ENOMEM; |
| 4070 | } |
| 4071 | |
| 4072 | xprt_info->log_ctx = ipc_router_get_log_ctx(xprt->name); |
| 4073 | |
| 4074 | if (!strcmp(xprt->name, "msm_ipc_router_loopback_xprt")) { |
| 4075 | xprt_info->remote_node_id = IPC_ROUTER_NID_LOCAL; |
| 4076 | xprt_info->initialized = 1; |
| 4077 | } |
| 4078 | |
| 4079 | IPC_RTR_INFO(xprt_info->log_ctx, "Adding xprt: [%s]\n", xprt->name); |
| 4080 | down_write(&xprt_info_list_lock_lha5); |
| 4081 | list_add_tail(&xprt_info->list, &xprt_info_list); |
| 4082 | up_write(&xprt_info_list_lock_lha5); |
| 4083 | |
| 4084 | down_write(&routing_table_lock_lha3); |
| 4085 | if (!routing_table_inited) { |
| 4086 | init_routing_table(); |
| 4087 | routing_table_inited = 1; |
| 4088 | } |
| 4089 | up_write(&routing_table_lock_lha3); |
| 4090 | |
| 4091 | xprt->priv = xprt_info; |
| 4092 | |
| 4093 | return 0; |
| 4094 | } |
| 4095 | |
| 4096 | static void msm_ipc_router_remove_xprt(struct msm_ipc_router_xprt *xprt) |
| 4097 | { |
| 4098 | struct msm_ipc_router_xprt_info *xprt_info; |
| 4099 | struct rr_packet *temp_pkt, *pkt; |
| 4100 | |
| 4101 | if (xprt && xprt->priv) { |
| 4102 | xprt_info = xprt->priv; |
| 4103 | |
| 4104 | IPC_RTR_INFO(xprt_info->log_ctx, "Removing xprt: [%s]\n", |
| 4105 | xprt->name); |
| 4106 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 4107 | xprt_info->abort_data_read = 1; |
| 4108 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 4109 | flush_workqueue(xprt_info->workqueue); |
| 4110 | destroy_workqueue(xprt_info->workqueue); |
| 4111 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 4112 | list_for_each_entry_safe(pkt, temp_pkt, |
| 4113 | &xprt_info->pkt_list, list) { |
| 4114 | list_del(&pkt->list); |
| 4115 | release_pkt(pkt); |
| 4116 | } |
| 4117 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 4118 | |
| 4119 | down_write(&xprt_info_list_lock_lha5); |
| 4120 | list_del(&xprt_info->list); |
| 4121 | up_write(&xprt_info_list_lock_lha5); |
| 4122 | |
| 4123 | msm_ipc_cleanup_routing_table(xprt_info); |
| 4124 | |
| 4125 | wakeup_source_trash(&xprt_info->ws); |
| 4126 | |
| 4127 | ipc_router_put_xprt_info_ref(xprt_info); |
| 4128 | wait_for_completion(&xprt_info->ref_complete); |
| 4129 | |
| 4130 | xprt->priv = 0; |
| 4131 | kfree(xprt_info); |
| 4132 | } |
| 4133 | } |
| 4134 | |
| 4135 | struct msm_ipc_router_xprt_work { |
| 4136 | struct msm_ipc_router_xprt *xprt; |
| 4137 | struct work_struct work; |
| 4138 | }; |
| 4139 | |
| 4140 | static void xprt_open_worker(struct work_struct *work) |
| 4141 | { |
| 4142 | struct msm_ipc_router_xprt_work *xprt_work = |
| 4143 | container_of(work, struct msm_ipc_router_xprt_work, work); |
| 4144 | |
| 4145 | msm_ipc_router_add_xprt(xprt_work->xprt); |
| 4146 | kfree(xprt_work); |
| 4147 | } |
| 4148 | |
| 4149 | static void xprt_close_worker(struct work_struct *work) |
| 4150 | { |
| 4151 | struct msm_ipc_router_xprt_work *xprt_work = |
| 4152 | container_of(work, struct msm_ipc_router_xprt_work, work); |
| 4153 | |
| 4154 | msm_ipc_router_remove_xprt(xprt_work->xprt); |
| 4155 | xprt_work->xprt->sft_close_done(xprt_work->xprt); |
| 4156 | kfree(xprt_work); |
| 4157 | } |
| 4158 | |
| 4159 | void msm_ipc_router_xprt_notify(struct msm_ipc_router_xprt *xprt, |
| 4160 | unsigned int event, |
| 4161 | void *data) |
| 4162 | { |
| 4163 | struct msm_ipc_router_xprt_info *xprt_info = xprt->priv; |
| 4164 | struct msm_ipc_router_xprt_work *xprt_work; |
| 4165 | struct rr_packet *pkt; |
| 4166 | int ret; |
| 4167 | |
| 4168 | ret = ipc_router_core_init(); |
| 4169 | if (ret < 0) { |
| 4170 | IPC_RTR_ERR("%s: Error %d initializing IPC Router\n", |
| 4171 | __func__, ret); |
| 4172 | return; |
| 4173 | } |
| 4174 | |
| 4175 | switch (event) { |
| 4176 | case IPC_ROUTER_XPRT_EVENT_OPEN: |
| 4177 | xprt_work = kmalloc(sizeof(*xprt_work), GFP_ATOMIC); |
| 4178 | if (xprt_work) { |
| 4179 | xprt_work->xprt = xprt; |
| 4180 | INIT_WORK(&xprt_work->work, xprt_open_worker); |
| 4181 | queue_work(msm_ipc_router_workqueue, &xprt_work->work); |
| 4182 | } else { |
| 4183 | IPC_RTR_ERR( |
| 4184 | "%s: malloc failure - Couldn't notify OPEN event", |
| 4185 | __func__); |
| 4186 | } |
| 4187 | break; |
| 4188 | |
| 4189 | case IPC_ROUTER_XPRT_EVENT_CLOSE: |
| 4190 | xprt_work = kmalloc(sizeof(*xprt_work), GFP_ATOMIC); |
| 4191 | if (xprt_work) { |
| 4192 | xprt_work->xprt = xprt; |
| 4193 | INIT_WORK(&xprt_work->work, xprt_close_worker); |
| 4194 | queue_work(msm_ipc_router_workqueue, &xprt_work->work); |
| 4195 | } else { |
| 4196 | IPC_RTR_ERR( |
| 4197 | "%s: malloc failure - Couldn't notify CLOSE event", |
| 4198 | __func__); |
| 4199 | } |
| 4200 | break; |
| 4201 | } |
| 4202 | |
| 4203 | if (!data) |
| 4204 | return; |
| 4205 | |
| 4206 | while (!xprt_info) { |
| 4207 | msleep(100); |
| 4208 | xprt_info = xprt->priv; |
| 4209 | } |
| 4210 | |
| 4211 | pkt = clone_pkt((struct rr_packet *)data); |
| 4212 | if (!pkt) |
| 4213 | return; |
| 4214 | |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4215 | pkt->ws_need = false; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4216 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 4217 | list_add_tail(&pkt->list, &xprt_info->pkt_list); |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4218 | if (!xprt_info->dynamic_ws) { |
| 4219 | __pm_stay_awake(&xprt_info->ws); |
| 4220 | pkt->ws_need = true; |
| 4221 | } else { |
| 4222 | if (is_wakeup_source_allowed) { |
| 4223 | __pm_stay_awake(&xprt_info->ws); |
| 4224 | pkt->ws_need = true; |
| 4225 | } |
| 4226 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4227 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 4228 | queue_work(xprt_info->workqueue, &xprt_info->read_data); |
| 4229 | } |
| 4230 | |
| 4231 | /** |
| 4232 | * parse_devicetree() - parse device tree binding |
| 4233 | * |
| 4234 | * @node: pointer to device tree node |
| 4235 | * |
| 4236 | * @return: 0 on success, -ENODEV on failure. |
| 4237 | */ |
| 4238 | static int parse_devicetree(struct device_node *node) |
| 4239 | { |
| 4240 | char *key; |
| 4241 | const char *peripheral = NULL; |
| 4242 | |
| 4243 | key = "qcom,default-peripheral"; |
| 4244 | peripheral = of_get_property(node, key, NULL); |
| 4245 | if (peripheral) |
| 4246 | strlcpy(default_peripheral, peripheral, PIL_SUBSYSTEM_NAME_LEN); |
| 4247 | |
| 4248 | return 0; |
| 4249 | } |
| 4250 | |
| 4251 | /** |
| 4252 | * ipc_router_probe() - Probe the IPC Router |
| 4253 | * |
| 4254 | * @pdev: Platform device corresponding to IPC Router. |
| 4255 | * |
| 4256 | * @return: 0 on success, standard Linux error codes on error. |
| 4257 | * |
| 4258 | * This function is called when the underlying device tree driver registers |
| 4259 | * a platform device, mapped to IPC Router. |
| 4260 | */ |
| 4261 | static int ipc_router_probe(struct platform_device *pdev) |
| 4262 | { |
| 4263 | int ret = 0; |
| 4264 | |
| 4265 | if (pdev && pdev->dev.of_node) { |
| 4266 | ret = parse_devicetree(pdev->dev.of_node); |
| 4267 | if (ret) |
| 4268 | IPC_RTR_ERR("%s: Failed to parse device tree\n", |
| 4269 | __func__); |
| 4270 | } |
| 4271 | return ret; |
| 4272 | } |
| 4273 | |
| 4274 | static const struct of_device_id ipc_router_match_table[] = { |
| 4275 | { .compatible = "qcom,ipc_router" }, |
| 4276 | {}, |
| 4277 | }; |
| 4278 | |
| 4279 | static struct platform_driver ipc_router_driver = { |
| 4280 | .probe = ipc_router_probe, |
| 4281 | .driver = { |
| 4282 | .name = MODULE_NAME, |
| 4283 | .owner = THIS_MODULE, |
| 4284 | .of_match_table = ipc_router_match_table, |
| 4285 | }, |
| 4286 | }; |
| 4287 | |
| 4288 | /** |
| 4289 | * ipc_router_core_init() - Initialize all IPC Router core data structures |
| 4290 | * |
| 4291 | * Return: 0 on Success or Standard error code otherwise. |
| 4292 | * |
| 4293 | * This function only initializes all the core data structures to the IPC Router |
| 4294 | * module. The remaining initialization is done inside msm_ipc_router_init(). |
| 4295 | */ |
| 4296 | static int ipc_router_core_init(void) |
| 4297 | { |
| 4298 | int i; |
| 4299 | int ret; |
| 4300 | struct msm_ipc_routing_table_entry *rt_entry; |
| 4301 | |
| 4302 | mutex_lock(&ipc_router_init_lock); |
| 4303 | if (likely(is_ipc_router_inited)) { |
| 4304 | mutex_unlock(&ipc_router_init_lock); |
| 4305 | return 0; |
| 4306 | } |
| 4307 | |
| 4308 | debugfs_init(); |
| 4309 | |
| 4310 | for (i = 0; i < SRV_HASH_SIZE; i++) |
| 4311 | INIT_LIST_HEAD(&server_list[i]); |
| 4312 | |
| 4313 | for (i = 0; i < LP_HASH_SIZE; i++) |
| 4314 | INIT_LIST_HEAD(&local_ports[i]); |
| 4315 | |
| 4316 | down_write(&routing_table_lock_lha3); |
| 4317 | if (!routing_table_inited) { |
| 4318 | init_routing_table(); |
| 4319 | routing_table_inited = 1; |
| 4320 | } |
| 4321 | up_write(&routing_table_lock_lha3); |
| 4322 | rt_entry = create_routing_table_entry(IPC_ROUTER_NID_LOCAL, NULL); |
| 4323 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 4324 | |
| 4325 | msm_ipc_router_workqueue = |
| 4326 | create_singlethread_workqueue("msm_ipc_router"); |
| 4327 | if (!msm_ipc_router_workqueue) { |
| 4328 | mutex_unlock(&ipc_router_init_lock); |
| 4329 | return -ENOMEM; |
| 4330 | } |
| 4331 | |
| 4332 | ret = msm_ipc_router_security_init(); |
| 4333 | if (ret < 0) |
| 4334 | IPC_RTR_ERR("%s: Security Init failed\n", __func__); |
| 4335 | else |
| 4336 | is_ipc_router_inited = true; |
| 4337 | mutex_unlock(&ipc_router_init_lock); |
| 4338 | |
| 4339 | return ret; |
| 4340 | } |
| 4341 | |
| 4342 | static int msm_ipc_router_init(void) |
| 4343 | { |
| 4344 | int ret; |
| 4345 | |
| 4346 | ret = ipc_router_core_init(); |
| 4347 | if (ret < 0) |
| 4348 | return ret; |
| 4349 | |
| 4350 | ret = platform_driver_register(&ipc_router_driver); |
| 4351 | if (ret) |
| 4352 | IPC_RTR_ERR( |
| 4353 | "%s: ipc_router_driver register failed %d\n", __func__, ret); |
| 4354 | |
| 4355 | ret = msm_ipc_router_init_sockets(); |
| 4356 | if (ret < 0) |
| 4357 | IPC_RTR_ERR("%s: Init sockets failed\n", __func__); |
| 4358 | |
| 4359 | ipc_router_log_ctx_init(); |
| 4360 | return ret; |
| 4361 | } |
| 4362 | |
| 4363 | module_init(msm_ipc_router_init); |
| 4364 | MODULE_DESCRIPTION("MSM IPC Router"); |
| 4365 | MODULE_LICENSE("GPL v2"); |