Arun Prakash | 8c8dd7a | 2020-03-30 22:22:13 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2011-2020, 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> |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 34 | #include <linux/kthread.h> |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 35 | #include <soc/qcom/subsystem_notif.h> |
| 36 | #include <soc/qcom/subsystem_restart.h> |
| 37 | |
| 38 | #include <asm/byteorder.h> |
| 39 | |
| 40 | #include "ipc_router_private.h" |
| 41 | #include "ipc_router_security.h" |
| 42 | |
| 43 | enum { |
| 44 | SMEM_LOG = 1U << 0, |
| 45 | RTR_DBG = 1U << 1, |
| 46 | }; |
| 47 | |
| 48 | static int msm_ipc_router_debug_mask; |
| 49 | module_param_named(debug_mask, msm_ipc_router_debug_mask, |
| 50 | int, 0664); |
| 51 | #define MODULE_NAME "ipc_router" |
| 52 | |
| 53 | #define IPC_RTR_INFO_PAGES 6 |
| 54 | |
| 55 | #define IPC_RTR_INFO(log_ctx, x...) do { \ |
| 56 | typeof(log_ctx) _log_ctx = (log_ctx); \ |
| 57 | if (_log_ctx) \ |
| 58 | ipc_log_string(_log_ctx, x); \ |
| 59 | if (msm_ipc_router_debug_mask & RTR_DBG) \ |
| 60 | pr_info("[IPCRTR] "x); \ |
| 61 | } while (0) |
| 62 | |
| 63 | #define IPC_ROUTER_LOG_EVENT_TX 0x01 |
| 64 | #define IPC_ROUTER_LOG_EVENT_RX 0x02 |
| 65 | #define IPC_ROUTER_LOG_EVENT_TX_ERR 0x03 |
| 66 | #define IPC_ROUTER_LOG_EVENT_RX_ERR 0x04 |
| 67 | #define IPC_ROUTER_DUMMY_DEST_NODE 0xFFFFFFFF |
| 68 | |
| 69 | #define ipc_port_sk(port) ((struct sock *)(port)) |
| 70 | |
| 71 | static LIST_HEAD(control_ports); |
| 72 | static DECLARE_RWSEM(control_ports_lock_lha5); |
| 73 | |
| 74 | #define LP_HASH_SIZE 32 |
| 75 | static struct list_head local_ports[LP_HASH_SIZE]; |
| 76 | static DECLARE_RWSEM(local_ports_lock_lhc2); |
| 77 | |
| 78 | /* Server info is organized as a hash table. The server's service ID is |
| 79 | * used to index into the hash table. The instance ID of most of the servers |
| 80 | * are 1 or 2. The service IDs are well distributed compared to the instance |
| 81 | * IDs and hence choosing service ID to index into this hash table optimizes |
| 82 | * the hash table operations like add, lookup, destroy. |
| 83 | */ |
| 84 | #define SRV_HASH_SIZE 32 |
| 85 | static struct list_head server_list[SRV_HASH_SIZE]; |
| 86 | static DECLARE_RWSEM(server_list_lock_lha2); |
| 87 | |
| 88 | struct msm_ipc_server { |
| 89 | struct list_head list; |
| 90 | struct kref ref; |
| 91 | struct msm_ipc_port_name name; |
| 92 | char pdev_name[32]; |
| 93 | int next_pdev_id; |
| 94 | int synced_sec_rule; |
| 95 | struct list_head server_port_list; |
| 96 | }; |
| 97 | |
| 98 | struct msm_ipc_server_port { |
| 99 | struct list_head list; |
| 100 | struct platform_device *pdev; |
| 101 | struct msm_ipc_port_addr server_addr; |
| 102 | struct msm_ipc_router_xprt_info *xprt_info; |
| 103 | }; |
| 104 | |
| 105 | struct msm_ipc_resume_tx_port { |
| 106 | struct list_head list; |
| 107 | u32 port_id; |
| 108 | u32 node_id; |
| 109 | }; |
| 110 | |
| 111 | struct ipc_router_conn_info { |
| 112 | struct list_head list; |
| 113 | u32 port_id; |
| 114 | }; |
| 115 | |
| 116 | enum { |
| 117 | RESET = 0, |
| 118 | VALID = 1, |
| 119 | }; |
| 120 | |
| 121 | #define RP_HASH_SIZE 32 |
| 122 | struct msm_ipc_router_remote_port { |
| 123 | struct list_head list; |
| 124 | struct kref ref; |
| 125 | struct mutex rport_lock_lhb2; /* lock for remote port state access */ |
| 126 | u32 node_id; |
| 127 | u32 port_id; |
| 128 | int status; |
| 129 | u32 tx_quota_cnt; |
| 130 | struct list_head resume_tx_port_list; |
| 131 | struct list_head conn_info_list; |
| 132 | void *sec_rule; |
| 133 | struct msm_ipc_server *server; |
| 134 | }; |
| 135 | |
| 136 | struct msm_ipc_router_xprt_info { |
| 137 | struct list_head list; |
| 138 | struct msm_ipc_router_xprt *xprt; |
| 139 | u32 remote_node_id; |
| 140 | u32 initialized; |
Arun Kumar Neelakantam | f99191d | 2018-06-11 18:13:43 +0530 | [diff] [blame] | 141 | u32 hello_sent; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 142 | struct list_head pkt_list; |
| 143 | struct wakeup_source ws; |
| 144 | struct mutex rx_lock_lhb2; /* lock for xprt rx operations */ |
| 145 | struct mutex tx_lock_lhb2; /* lock for xprt tx operations */ |
| 146 | u32 need_len; |
| 147 | u32 abort_data_read; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 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; |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 152 | |
| 153 | struct kthread_worker kworker; |
| 154 | struct task_struct *task; |
| 155 | struct kthread_work read_data; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 156 | }; |
| 157 | |
| 158 | #define RT_HASH_SIZE 4 |
| 159 | struct msm_ipc_routing_table_entry { |
| 160 | struct list_head list; |
| 161 | struct kref ref; |
| 162 | u32 node_id; |
| 163 | u32 neighbor_node_id; |
| 164 | struct list_head remote_port_list[RP_HASH_SIZE]; |
| 165 | struct msm_ipc_router_xprt_info *xprt_info; |
| 166 | struct rw_semaphore lock_lha4; |
| 167 | unsigned long num_tx_bytes; |
| 168 | unsigned long num_rx_bytes; |
| 169 | }; |
| 170 | |
| 171 | #define LOG_CTX_NAME_LEN 32 |
| 172 | struct ipc_rtr_log_ctx { |
| 173 | struct list_head list; |
| 174 | char log_ctx_name[LOG_CTX_NAME_LEN]; |
| 175 | void *log_ctx; |
| 176 | }; |
| 177 | |
| 178 | static struct list_head routing_table[RT_HASH_SIZE]; |
| 179 | static DECLARE_RWSEM(routing_table_lock_lha3); |
| 180 | static int routing_table_inited; |
| 181 | |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 182 | static void do_read_data(struct kthread_work *work); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 183 | |
| 184 | static LIST_HEAD(xprt_info_list); |
| 185 | static DECLARE_RWSEM(xprt_info_list_lock_lha5); |
| 186 | |
| 187 | static DEFINE_MUTEX(log_ctx_list_lock_lha0); |
| 188 | static LIST_HEAD(log_ctx_list); |
| 189 | static DEFINE_MUTEX(ipc_router_init_lock); |
| 190 | static bool is_ipc_router_inited; |
| 191 | static int ipc_router_core_init(void); |
| 192 | #define IPC_ROUTER_INIT_TIMEOUT (10 * HZ) |
| 193 | |
| 194 | static u32 next_port_id; |
| 195 | static DEFINE_MUTEX(next_port_id_lock_lhc1); |
| 196 | static struct workqueue_struct *msm_ipc_router_workqueue; |
| 197 | |
| 198 | static void *local_log_ctx; |
| 199 | static void *ipc_router_get_log_ctx(char *sub_name); |
| 200 | static int process_resume_tx_msg(union rr_control_msg *msg, |
| 201 | struct rr_packet *pkt); |
| 202 | static void ipc_router_reset_conn(struct msm_ipc_router_remote_port *rport_ptr); |
| 203 | static int ipc_router_get_xprt_info_ref( |
| 204 | struct msm_ipc_router_xprt_info *xprt_info); |
| 205 | static void ipc_router_put_xprt_info_ref( |
| 206 | struct msm_ipc_router_xprt_info *xprt_info); |
| 207 | static void ipc_router_release_xprt_info_ref(struct kref *ref); |
| 208 | |
| 209 | struct pil_vote_info { |
| 210 | void *pil_handle; |
| 211 | struct work_struct load_work; |
| 212 | struct work_struct unload_work; |
| 213 | }; |
| 214 | |
| 215 | #define PIL_SUBSYSTEM_NAME_LEN 32 |
| 216 | static char default_peripheral[PIL_SUBSYSTEM_NAME_LEN]; |
| 217 | |
| 218 | enum { |
| 219 | DOWN, |
| 220 | UP, |
| 221 | }; |
| 222 | |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 223 | static bool is_wakeup_source_allowed; |
| 224 | |
| 225 | void msm_ipc_router_set_ws_allowed(bool flag) |
| 226 | { |
| 227 | is_wakeup_source_allowed = flag; |
| 228 | } |
| 229 | |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 230 | /** |
| 231 | * is_sensor_port() - Check if the remote port is sensor service or not |
| 232 | * @rport: Pointer to the remote port. |
| 233 | * |
| 234 | * Return: true if the remote port is sensor service else false. |
| 235 | */ |
| 236 | static int is_sensor_port(struct msm_ipc_router_remote_port *rport) |
| 237 | { |
| 238 | u32 svcid = 0; |
| 239 | |
| 240 | if (rport && rport->server) { |
| 241 | svcid = rport->server->name.service; |
shermanwei | 9025f7a | 2019-09-05 11:27:27 +0800 | [diff] [blame^] | 242 | /* hold wakelock for thresh(proximity) algo sensor and |
| 243 | * OEM1(e.g: pick up gesture sensor) */ |
| 244 | if (svcid == 277 || svcid == 287) |
| 245 | return false; |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 246 | if (svcid == 400 || (svcid >= 256 && svcid <= 320)) |
| 247 | return true; |
| 248 | } |
| 249 | |
| 250 | return false; |
| 251 | } |
| 252 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 253 | static void init_routing_table(void) |
| 254 | { |
| 255 | int i; |
| 256 | |
| 257 | for (i = 0; i < RT_HASH_SIZE; i++) |
| 258 | INIT_LIST_HEAD(&routing_table[i]); |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * ipc_router_calc_checksum() - compute the checksum for extended HELLO message |
| 263 | * @msg: Reference to the IPC Router HELLO message. |
| 264 | * |
| 265 | * Return: Computed checksum value, 0 if msg is NULL. |
| 266 | */ |
| 267 | static u32 ipc_router_calc_checksum(union rr_control_msg *msg) |
| 268 | { |
| 269 | u32 checksum = 0; |
| 270 | int i, len; |
| 271 | u16 upper_nb; |
| 272 | u16 lower_nb; |
| 273 | void *hello; |
| 274 | |
| 275 | if (!msg) |
| 276 | return checksum; |
| 277 | hello = msg; |
| 278 | len = sizeof(*msg); |
| 279 | |
| 280 | for (i = 0; i < len / IPCR_WORD_SIZE; i++) { |
| 281 | lower_nb = (*((u32 *)hello)) & IPC_ROUTER_CHECKSUM_MASK; |
| 282 | upper_nb = ((*((u32 *)hello)) >> 16) & |
| 283 | IPC_ROUTER_CHECKSUM_MASK; |
| 284 | checksum = checksum + upper_nb + lower_nb; |
| 285 | hello = ((u32 *)hello) + 1; |
| 286 | } |
| 287 | while (checksum > 0xFFFF) |
| 288 | checksum = (checksum & IPC_ROUTER_CHECKSUM_MASK) + |
| 289 | ((checksum >> 16) & IPC_ROUTER_CHECKSUM_MASK); |
| 290 | |
| 291 | checksum = ~checksum & IPC_ROUTER_CHECKSUM_MASK; |
| 292 | return checksum; |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * skb_copy_to_log_buf() - copies the required number bytes from the skb_queue |
| 297 | * @skb_head: skb_queue head that contains the data. |
| 298 | * @pl_len: length of payload need to be copied. |
| 299 | * @hdr_offset: length of the header present in first skb |
| 300 | * @log_buf: The output buffer which will contain the formatted log string |
| 301 | * |
| 302 | * This function copies the first specified number of bytes from the skb_queue |
| 303 | * to a new buffer and formats them to a string for logging. |
| 304 | */ |
| 305 | static void skb_copy_to_log_buf(struct sk_buff_head *skb_head, |
| 306 | unsigned int pl_len, unsigned int hdr_offset, |
Arun Kumar Neelakantam | 7e4f46b | 2018-03-29 20:10:02 +0530 | [diff] [blame] | 307 | unsigned char *log_buf) |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 308 | { |
| 309 | struct sk_buff *temp_skb; |
| 310 | unsigned int copied_len = 0, copy_len = 0; |
| 311 | int remaining; |
| 312 | |
| 313 | if (!skb_head) { |
| 314 | IPC_RTR_ERR("%s: NULL skb_head\n", __func__); |
| 315 | return; |
| 316 | } |
| 317 | temp_skb = skb_peek(skb_head); |
| 318 | if (unlikely(!temp_skb || !temp_skb->data)) { |
| 319 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 320 | return; |
| 321 | } |
| 322 | |
| 323 | remaining = temp_skb->len - hdr_offset; |
| 324 | skb_queue_walk(skb_head, temp_skb) { |
| 325 | copy_len = remaining < pl_len ? remaining : pl_len; |
| 326 | memcpy(log_buf + copied_len, temp_skb->data + hdr_offset, |
| 327 | copy_len); |
| 328 | copied_len += copy_len; |
| 329 | hdr_offset = 0; |
| 330 | if (copied_len == pl_len) |
| 331 | break; |
| 332 | remaining = pl_len - remaining; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | /** |
| 337 | * ipc_router_log_msg() - log all data messages exchanged |
| 338 | * @log_ctx: IPC Logging context specific to each transport |
| 339 | * @xchng_type: Identifies the data to be a receive or send. |
| 340 | * @data: IPC Router data packet or control msg received or to be send. |
| 341 | * @hdr: Reference to the router header |
| 342 | * @port_ptr: Local IPC Router port. |
| 343 | * @rport_ptr: Remote IPC Router port |
| 344 | * |
| 345 | * This function builds the log message that would be passed on to the IPC |
| 346 | * logging framework. The data messages that would be passed corresponds to |
| 347 | * the information that is exchanged between the IPC Router and it's clients. |
| 348 | */ |
| 349 | static void ipc_router_log_msg(void *log_ctx, u32 xchng_type, |
| 350 | void *data, struct rr_header_v1 *hdr, |
| 351 | struct msm_ipc_port *port_ptr, |
| 352 | struct msm_ipc_router_remote_port *rport_ptr) |
| 353 | { |
| 354 | struct sk_buff_head *skb_head = NULL; |
| 355 | union rr_control_msg *msg = NULL; |
| 356 | struct rr_packet *pkt = NULL; |
| 357 | u64 pl_buf = 0; |
| 358 | struct sk_buff *skb; |
| 359 | u32 buf_len = 8; |
| 360 | u32 svc_id = 0; |
| 361 | u32 svc_ins = 0; |
| 362 | unsigned int hdr_offset = 0; |
| 363 | u32 port_type = 0; |
| 364 | |
| 365 | if (!log_ctx || !hdr || !data) |
| 366 | return; |
| 367 | |
| 368 | if (hdr->type == IPC_ROUTER_CTRL_CMD_DATA) { |
| 369 | pkt = (struct rr_packet *)data; |
| 370 | skb_head = pkt->pkt_fragment_q; |
| 371 | skb = skb_peek(skb_head); |
| 372 | if (!skb || !skb->data) { |
| 373 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 374 | return; |
| 375 | } |
| 376 | |
| 377 | if (skb_queue_len(skb_head) == 1 && skb->len < 8) |
| 378 | buf_len = skb->len; |
| 379 | if (xchng_type == IPC_ROUTER_LOG_EVENT_TX && hdr->dst_node_id |
| 380 | != IPC_ROUTER_NID_LOCAL) { |
| 381 | if (hdr->version == IPC_ROUTER_V1) |
| 382 | hdr_offset = sizeof(struct rr_header_v1); |
| 383 | else if (hdr->version == IPC_ROUTER_V2) |
| 384 | hdr_offset = sizeof(struct rr_header_v2); |
| 385 | } |
Arun Kumar Neelakantam | 7e4f46b | 2018-03-29 20:10:02 +0530 | [diff] [blame] | 386 | skb_copy_to_log_buf(skb_head, buf_len, hdr_offset, |
| 387 | (unsigned char *)&pl_buf); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 388 | |
| 389 | if (port_ptr && rport_ptr && (port_ptr->type == CLIENT_PORT) && |
| 390 | rport_ptr->server) { |
| 391 | svc_id = rport_ptr->server->name.service; |
| 392 | svc_ins = rport_ptr->server->name.instance; |
| 393 | port_type = CLIENT_PORT; |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame] | 394 | port_ptr->last_served_svc_id = |
| 395 | rport_ptr->server->name.service; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 396 | } else if (port_ptr && (port_ptr->type == SERVER_PORT)) { |
| 397 | svc_id = port_ptr->port_name.service; |
| 398 | svc_ins = port_ptr->port_name.instance; |
| 399 | port_type = SERVER_PORT; |
| 400 | } |
| 401 | IPC_RTR_INFO(log_ctx, |
| 402 | "%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", |
| 403 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "" : |
| 404 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? |
| 405 | current->comm : "")), |
| 406 | (port_type == CLIENT_PORT ? "CLI" : "SRV"), |
| 407 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 408 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| 409 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX_ERR ? "TX_ERR" : |
| 410 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX_ERR ? "RX_ERR" : |
| 411 | "UNKNOWN")))), |
| 412 | hdr->size, hdr->type, hdr->control_flag, |
| 413 | svc_id, svc_ins, hdr->src_node_id, hdr->src_port_id, |
| 414 | hdr->dst_node_id, hdr->dst_port_id, |
| 415 | (unsigned int)pl_buf, (unsigned int)(pl_buf >> 32)); |
| 416 | |
| 417 | } else { |
| 418 | msg = (union rr_control_msg *)data; |
| 419 | if (msg->cmd == IPC_ROUTER_CTRL_CMD_NEW_SERVER || |
| 420 | msg->cmd == IPC_ROUTER_CTRL_CMD_REMOVE_SERVER) |
| 421 | IPC_RTR_INFO(log_ctx, |
| 422 | "CTL MSG: %s cmd:0x%x SVC:<0x%x:0x%x> ADDR:<0x%x:0x%x>", |
| 423 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 424 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| 425 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX_ERR ? "TX_ERR" : |
| 426 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX_ERR ? "RX_ERR" : |
| 427 | "UNKNOWN")))), |
| 428 | msg->cmd, msg->srv.service, msg->srv.instance, |
| 429 | msg->srv.node_id, msg->srv.port_id); |
| 430 | else if (msg->cmd == IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT || |
| 431 | msg->cmd == IPC_ROUTER_CTRL_CMD_RESUME_TX) |
| 432 | IPC_RTR_INFO(log_ctx, |
| 433 | "CTL MSG: %s cmd:0x%x ADDR: <0x%x:0x%x>", |
| 434 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 435 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| 436 | msg->cmd, msg->cli.node_id, msg->cli.port_id); |
Arun Prakash | 0fd19c2 | 2019-09-20 15:03:52 +0530 | [diff] [blame] | 437 | else if (msg->cmd == IPC_ROUTER_CTRL_CMD_HELLO && hdr) { |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 438 | IPC_RTR_INFO(log_ctx, |
| 439 | "CTL MSG %s cmd:0x%x ADDR:0x%x", |
| 440 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 441 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| 442 | msg->cmd, hdr->src_node_id); |
Arun Prakash | 0fd19c2 | 2019-09-20 15:03:52 +0530 | [diff] [blame] | 443 | if (hdr->src_node_id == 0 || hdr->src_node_id == 3) |
| 444 | pr_err("%s: Modem QMI Readiness %s cmd:0x%x ADDR:0x%x\n", |
| 445 | __func__, |
| 446 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 447 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| 448 | "ERR")), msg->cmd, hdr->src_node_id); |
| 449 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 450 | else |
| 451 | IPC_RTR_INFO(log_ctx, |
| 452 | "%s UNKNOWN cmd:0x%x", |
| 453 | (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| 454 | (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| 455 | msg->cmd); |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | /* Must be called with routing_table_lock_lha3 locked. */ |
| 460 | static struct msm_ipc_routing_table_entry *lookup_routing_table( |
| 461 | u32 node_id) |
| 462 | { |
| 463 | u32 key = (node_id % RT_HASH_SIZE); |
| 464 | struct msm_ipc_routing_table_entry *rt_entry; |
| 465 | |
| 466 | list_for_each_entry(rt_entry, &routing_table[key], list) { |
| 467 | if (rt_entry->node_id == node_id) |
| 468 | return rt_entry; |
| 469 | } |
| 470 | return NULL; |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * create_routing_table_entry() - Lookup and create a routing table entry |
| 475 | * @node_id: Node ID of the routing table entry to be created. |
| 476 | * @xprt_info: XPRT through which the node ID is reachable. |
| 477 | * |
| 478 | * @return: a reference to the routing table entry on success, NULL on failure. |
| 479 | */ |
| 480 | static struct msm_ipc_routing_table_entry *create_routing_table_entry( |
| 481 | u32 node_id, struct msm_ipc_router_xprt_info *xprt_info) |
| 482 | { |
| 483 | int i; |
| 484 | struct msm_ipc_routing_table_entry *rt_entry; |
| 485 | u32 key; |
| 486 | |
| 487 | down_write(&routing_table_lock_lha3); |
| 488 | rt_entry = lookup_routing_table(node_id); |
| 489 | if (rt_entry) |
| 490 | goto out_create_rtentry1; |
| 491 | |
| 492 | rt_entry = kmalloc(sizeof(*rt_entry), GFP_KERNEL); |
| 493 | if (!rt_entry) { |
| 494 | IPC_RTR_ERR("%s: rt_entry allocation failed for %d\n", |
| 495 | __func__, node_id); |
| 496 | goto out_create_rtentry2; |
| 497 | } |
| 498 | |
| 499 | for (i = 0; i < RP_HASH_SIZE; i++) |
| 500 | INIT_LIST_HEAD(&rt_entry->remote_port_list[i]); |
| 501 | init_rwsem(&rt_entry->lock_lha4); |
| 502 | kref_init(&rt_entry->ref); |
| 503 | rt_entry->node_id = node_id; |
| 504 | rt_entry->xprt_info = xprt_info; |
| 505 | if (xprt_info) |
| 506 | rt_entry->neighbor_node_id = xprt_info->remote_node_id; |
| 507 | |
| 508 | key = (node_id % RT_HASH_SIZE); |
| 509 | list_add_tail(&rt_entry->list, &routing_table[key]); |
| 510 | out_create_rtentry1: |
| 511 | kref_get(&rt_entry->ref); |
| 512 | out_create_rtentry2: |
| 513 | up_write(&routing_table_lock_lha3); |
| 514 | return rt_entry; |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * ipc_router_get_rtentry_ref() - Get a reference to the routing table entry |
| 519 | * @node_id: Node ID of the routing table entry. |
| 520 | * |
| 521 | * @return: a reference to the routing table entry on success, NULL on failure. |
| 522 | * |
| 523 | * This function is used to obtain a reference to the rounting table entry |
| 524 | * corresponding to a node id. |
| 525 | */ |
| 526 | static struct msm_ipc_routing_table_entry *ipc_router_get_rtentry_ref( |
| 527 | u32 node_id) |
| 528 | { |
| 529 | struct msm_ipc_routing_table_entry *rt_entry; |
| 530 | |
| 531 | down_read(&routing_table_lock_lha3); |
| 532 | rt_entry = lookup_routing_table(node_id); |
| 533 | if (rt_entry) |
| 534 | kref_get(&rt_entry->ref); |
| 535 | up_read(&routing_table_lock_lha3); |
| 536 | return rt_entry; |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * ipc_router_release_rtentry() - Cleanup and release the routing table entry |
| 541 | * @ref: Reference to the entry. |
| 542 | * |
| 543 | * This function is called when all references to the routing table entry are |
| 544 | * released. |
| 545 | */ |
| 546 | void ipc_router_release_rtentry(struct kref *ref) |
| 547 | { |
| 548 | struct msm_ipc_routing_table_entry *rt_entry = |
| 549 | container_of(ref, struct msm_ipc_routing_table_entry, ref); |
| 550 | |
| 551 | /* All references to a routing entry will be put only under SSR. |
| 552 | * As part of SSR, all the internals of the routing table entry |
| 553 | * are cleaned. So just free the routing table entry. |
| 554 | */ |
| 555 | kfree(rt_entry); |
| 556 | } |
| 557 | |
| 558 | struct rr_packet *rr_read(struct msm_ipc_router_xprt_info *xprt_info) |
| 559 | { |
| 560 | struct rr_packet *temp_pkt; |
| 561 | |
| 562 | if (!xprt_info) |
| 563 | return NULL; |
| 564 | |
| 565 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 566 | if (xprt_info->abort_data_read) { |
| 567 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 568 | IPC_RTR_ERR("%s detected SSR & exiting now\n", |
| 569 | xprt_info->xprt->name); |
| 570 | return NULL; |
| 571 | } |
| 572 | |
| 573 | if (list_empty(&xprt_info->pkt_list)) { |
| 574 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 575 | return NULL; |
| 576 | } |
| 577 | |
| 578 | temp_pkt = list_first_entry(&xprt_info->pkt_list, |
| 579 | struct rr_packet, list); |
| 580 | list_del(&temp_pkt->list); |
| 581 | if (list_empty(&xprt_info->pkt_list)) |
| 582 | __pm_relax(&xprt_info->ws); |
| 583 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 584 | return temp_pkt; |
| 585 | } |
| 586 | |
| 587 | struct rr_packet *clone_pkt(struct rr_packet *pkt) |
| 588 | { |
| 589 | struct rr_packet *cloned_pkt; |
| 590 | struct sk_buff *temp_skb, *cloned_skb; |
| 591 | struct sk_buff_head *pkt_fragment_q; |
| 592 | |
| 593 | cloned_pkt = kzalloc(sizeof(*cloned_pkt), GFP_KERNEL); |
| 594 | if (!cloned_pkt) { |
| 595 | IPC_RTR_ERR("%s: failure\n", __func__); |
| 596 | return NULL; |
| 597 | } |
| 598 | memcpy(&cloned_pkt->hdr, &pkt->hdr, sizeof(struct rr_header_v1)); |
| 599 | if (pkt->opt_hdr.len > 0) { |
| 600 | cloned_pkt->opt_hdr.data = kmalloc(pkt->opt_hdr.len, |
| 601 | GFP_KERNEL); |
| 602 | if (!cloned_pkt->opt_hdr.data) { |
| 603 | IPC_RTR_ERR("%s: Memory allocation Failed\n", __func__); |
| 604 | } else { |
| 605 | cloned_pkt->opt_hdr.len = pkt->opt_hdr.len; |
| 606 | memcpy(cloned_pkt->opt_hdr.data, pkt->opt_hdr.data, |
| 607 | pkt->opt_hdr.len); |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | pkt_fragment_q = kmalloc(sizeof(*pkt_fragment_q), GFP_KERNEL); |
| 612 | if (!pkt_fragment_q) { |
| 613 | IPC_RTR_ERR("%s: pkt_frag_q alloc failure\n", __func__); |
| 614 | kfree(cloned_pkt); |
| 615 | return NULL; |
| 616 | } |
| 617 | skb_queue_head_init(pkt_fragment_q); |
| 618 | kref_init(&cloned_pkt->ref); |
| 619 | |
| 620 | skb_queue_walk(pkt->pkt_fragment_q, temp_skb) { |
| 621 | cloned_skb = skb_clone(temp_skb, GFP_KERNEL); |
| 622 | if (!cloned_skb) |
| 623 | goto fail_clone; |
| 624 | skb_queue_tail(pkt_fragment_q, cloned_skb); |
| 625 | } |
| 626 | cloned_pkt->pkt_fragment_q = pkt_fragment_q; |
| 627 | cloned_pkt->length = pkt->length; |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 628 | cloned_pkt->ws_need = pkt->ws_need; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 629 | return cloned_pkt; |
| 630 | |
| 631 | fail_clone: |
| 632 | while (!skb_queue_empty(pkt_fragment_q)) { |
| 633 | temp_skb = skb_dequeue(pkt_fragment_q); |
| 634 | kfree_skb(temp_skb); |
| 635 | } |
| 636 | kfree(pkt_fragment_q); |
| 637 | if (cloned_pkt->opt_hdr.len > 0) |
| 638 | kfree(cloned_pkt->opt_hdr.data); |
| 639 | kfree(cloned_pkt); |
| 640 | return NULL; |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * create_pkt() - Create a Router packet |
| 645 | * @data: SKB queue to be contained inside the packet. |
| 646 | * |
| 647 | * @return: pointer to packet on success, NULL on failure. |
| 648 | */ |
| 649 | struct rr_packet *create_pkt(struct sk_buff_head *data) |
| 650 | { |
| 651 | struct rr_packet *pkt; |
| 652 | struct sk_buff *temp_skb; |
| 653 | |
| 654 | pkt = kzalloc(sizeof(*pkt), GFP_KERNEL); |
| 655 | if (!pkt) { |
| 656 | IPC_RTR_ERR("%s: failure\n", __func__); |
| 657 | return NULL; |
| 658 | } |
| 659 | |
| 660 | if (data) { |
| 661 | pkt->pkt_fragment_q = data; |
| 662 | skb_queue_walk(pkt->pkt_fragment_q, temp_skb) |
| 663 | pkt->length += temp_skb->len; |
| 664 | } else { |
| 665 | pkt->pkt_fragment_q = kmalloc(sizeof(*pkt->pkt_fragment_q), |
| 666 | GFP_KERNEL); |
| 667 | if (!pkt->pkt_fragment_q) { |
| 668 | IPC_RTR_ERR("%s: Couldn't alloc pkt_fragment_q\n", |
| 669 | __func__); |
| 670 | kfree(pkt); |
| 671 | return NULL; |
| 672 | } |
| 673 | skb_queue_head_init(pkt->pkt_fragment_q); |
| 674 | } |
| 675 | kref_init(&pkt->ref); |
| 676 | return pkt; |
| 677 | } |
| 678 | |
| 679 | void release_pkt(struct rr_packet *pkt) |
| 680 | { |
| 681 | struct sk_buff *temp_skb; |
| 682 | |
| 683 | if (!pkt) |
| 684 | return; |
| 685 | |
| 686 | if (!pkt->pkt_fragment_q) { |
| 687 | kfree(pkt); |
| 688 | return; |
| 689 | } |
| 690 | |
| 691 | while (!skb_queue_empty(pkt->pkt_fragment_q)) { |
| 692 | temp_skb = skb_dequeue(pkt->pkt_fragment_q); |
| 693 | kfree_skb(temp_skb); |
| 694 | } |
| 695 | kfree(pkt->pkt_fragment_q); |
| 696 | if (pkt->opt_hdr.len > 0) |
| 697 | kfree(pkt->opt_hdr.data); |
| 698 | kfree(pkt); |
| 699 | } |
| 700 | |
| 701 | static struct sk_buff_head *msm_ipc_router_buf_to_skb(void *buf, |
| 702 | unsigned int buf_len) |
| 703 | { |
| 704 | struct sk_buff_head *skb_head; |
| 705 | struct sk_buff *skb; |
| 706 | int first = 1, offset = 0; |
| 707 | int skb_size, data_size; |
| 708 | void *data; |
| 709 | int last = 1; |
| 710 | int align_size; |
| 711 | |
| 712 | skb_head = kmalloc(sizeof(*skb_head), GFP_KERNEL); |
| 713 | if (!skb_head) { |
| 714 | IPC_RTR_ERR("%s: Couldnot allocate skb_head\n", __func__); |
| 715 | return NULL; |
| 716 | } |
| 717 | skb_queue_head_init(skb_head); |
| 718 | |
| 719 | data_size = buf_len; |
| 720 | align_size = ALIGN_SIZE(data_size); |
| 721 | while (offset != buf_len) { |
| 722 | skb_size = data_size; |
| 723 | if (first) |
| 724 | skb_size += IPC_ROUTER_HDR_SIZE; |
| 725 | if (last) |
| 726 | skb_size += align_size; |
| 727 | |
| 728 | skb = alloc_skb(skb_size, GFP_KERNEL); |
| 729 | if (!skb) { |
| 730 | if (skb_size <= (PAGE_SIZE / 2)) { |
| 731 | IPC_RTR_ERR("%s: cannot allocate skb\n", |
| 732 | __func__); |
| 733 | goto buf_to_skb_error; |
| 734 | } |
| 735 | data_size = data_size / 2; |
| 736 | last = 0; |
| 737 | continue; |
| 738 | } |
| 739 | |
| 740 | if (first) { |
| 741 | skb_reserve(skb, IPC_ROUTER_HDR_SIZE); |
| 742 | first = 0; |
| 743 | } |
| 744 | |
| 745 | data = skb_put(skb, data_size); |
| 746 | memcpy(skb->data, buf + offset, data_size); |
| 747 | skb_queue_tail(skb_head, skb); |
| 748 | offset += data_size; |
| 749 | data_size = buf_len - offset; |
| 750 | last = 1; |
| 751 | } |
| 752 | return skb_head; |
| 753 | |
| 754 | buf_to_skb_error: |
| 755 | while (!skb_queue_empty(skb_head)) { |
| 756 | skb = skb_dequeue(skb_head); |
| 757 | kfree_skb(skb); |
| 758 | } |
| 759 | kfree(skb_head); |
| 760 | return NULL; |
| 761 | } |
| 762 | |
| 763 | static void *msm_ipc_router_skb_to_buf(struct sk_buff_head *skb_head, |
| 764 | unsigned int len) |
| 765 | { |
| 766 | struct sk_buff *temp; |
| 767 | unsigned int offset = 0, buf_len = 0, copy_len; |
| 768 | void *buf; |
| 769 | |
| 770 | if (!skb_head) { |
| 771 | IPC_RTR_ERR("%s: NULL skb_head\n", __func__); |
| 772 | return NULL; |
| 773 | } |
| 774 | |
| 775 | temp = skb_peek(skb_head); |
| 776 | buf_len = len; |
| 777 | buf = kmalloc(buf_len, GFP_KERNEL); |
| 778 | if (!buf) { |
| 779 | IPC_RTR_ERR("%s: cannot allocate buf\n", __func__); |
| 780 | return NULL; |
| 781 | } |
| 782 | skb_queue_walk(skb_head, temp) { |
| 783 | copy_len = buf_len < temp->len ? buf_len : temp->len; |
| 784 | memcpy(buf + offset, temp->data, copy_len); |
| 785 | offset += copy_len; |
| 786 | buf_len -= copy_len; |
| 787 | } |
| 788 | return buf; |
| 789 | } |
| 790 | |
| 791 | void msm_ipc_router_free_skb(struct sk_buff_head *skb_head) |
| 792 | { |
| 793 | struct sk_buff *temp_skb; |
| 794 | |
| 795 | if (!skb_head) |
| 796 | return; |
| 797 | |
| 798 | while (!skb_queue_empty(skb_head)) { |
| 799 | temp_skb = skb_dequeue(skb_head); |
| 800 | kfree_skb(temp_skb); |
| 801 | } |
| 802 | kfree(skb_head); |
| 803 | } |
| 804 | |
| 805 | /** |
| 806 | * extract_optional_header() - Extract the optional header from skb |
| 807 | * @pkt: Packet structure into which the header has to be extracted. |
| 808 | * @opt_len: The optional header length in word size. |
| 809 | * |
| 810 | * @return: Length of optional header in bytes if success, zero otherwise. |
| 811 | */ |
| 812 | static int extract_optional_header(struct rr_packet *pkt, u8 opt_len) |
| 813 | { |
| 814 | size_t offset = 0, buf_len = 0, copy_len, opt_hdr_len; |
| 815 | struct sk_buff *temp; |
| 816 | struct sk_buff_head *skb_head; |
| 817 | |
| 818 | opt_hdr_len = opt_len * IPCR_WORD_SIZE; |
| 819 | pkt->opt_hdr.data = kmalloc(opt_hdr_len, GFP_KERNEL); |
| 820 | if (!pkt->opt_hdr.data) { |
| 821 | IPC_RTR_ERR("%s: Memory allocation Failed\n", __func__); |
| 822 | return 0; |
| 823 | } |
| 824 | skb_head = pkt->pkt_fragment_q; |
| 825 | buf_len = opt_hdr_len; |
| 826 | skb_queue_walk(skb_head, temp) { |
| 827 | copy_len = buf_len < temp->len ? buf_len : temp->len; |
| 828 | memcpy(pkt->opt_hdr.data + offset, temp->data, copy_len); |
| 829 | offset += copy_len; |
| 830 | buf_len -= copy_len; |
| 831 | skb_pull(temp, copy_len); |
| 832 | if (temp->len == 0) { |
| 833 | skb_dequeue(skb_head); |
| 834 | kfree_skb(temp); |
| 835 | } |
| 836 | } |
| 837 | pkt->opt_hdr.len = opt_hdr_len; |
| 838 | return opt_hdr_len; |
| 839 | } |
| 840 | |
| 841 | /** |
| 842 | * extract_header_v1() - Extract IPC Router header of version 1 |
| 843 | * @pkt: Packet structure into which the header has to be extraced. |
| 844 | * @skb: SKB from which the header has to be extracted. |
| 845 | * |
| 846 | * @return: 0 on success, standard Linux error codes on failure. |
| 847 | */ |
| 848 | static int extract_header_v1(struct rr_packet *pkt, struct sk_buff *skb) |
| 849 | { |
| 850 | if (!pkt || !skb) { |
| 851 | IPC_RTR_ERR("%s: Invalid pkt or skb\n", __func__); |
| 852 | return -EINVAL; |
| 853 | } |
| 854 | |
| 855 | memcpy(&pkt->hdr, skb->data, sizeof(struct rr_header_v1)); |
| 856 | skb_pull(skb, sizeof(struct rr_header_v1)); |
| 857 | pkt->length -= sizeof(struct rr_header_v1); |
| 858 | return 0; |
| 859 | } |
| 860 | |
| 861 | /** |
| 862 | * extract_header_v2() - Extract IPC Router header of version 2 |
| 863 | * @pkt: Packet structure into which the header has to be extraced. |
| 864 | * @skb: SKB from which the header has to be extracted. |
| 865 | * |
| 866 | * @return: 0 on success, standard Linux error codes on failure. |
| 867 | */ |
| 868 | static int extract_header_v2(struct rr_packet *pkt, struct sk_buff *skb) |
| 869 | { |
| 870 | struct rr_header_v2 *hdr; |
| 871 | u8 opt_len; |
| 872 | size_t opt_hdr_len; |
| 873 | size_t total_hdr_size = sizeof(*hdr); |
| 874 | |
| 875 | if (!pkt || !skb) { |
| 876 | IPC_RTR_ERR("%s: Invalid pkt or skb\n", __func__); |
| 877 | return -EINVAL; |
| 878 | } |
| 879 | |
| 880 | hdr = (struct rr_header_v2 *)skb->data; |
| 881 | pkt->hdr.version = (u32)hdr->version; |
| 882 | pkt->hdr.type = (u32)hdr->type; |
| 883 | pkt->hdr.src_node_id = (u32)hdr->src_node_id; |
| 884 | pkt->hdr.src_port_id = (u32)hdr->src_port_id; |
| 885 | pkt->hdr.size = (u32)hdr->size; |
| 886 | pkt->hdr.control_flag = (u32)hdr->control_flag; |
| 887 | pkt->hdr.dst_node_id = (u32)hdr->dst_node_id; |
| 888 | pkt->hdr.dst_port_id = (u32)hdr->dst_port_id; |
| 889 | opt_len = hdr->opt_len; |
| 890 | skb_pull(skb, total_hdr_size); |
| 891 | if (opt_len > 0) { |
| 892 | opt_hdr_len = extract_optional_header(pkt, opt_len); |
| 893 | total_hdr_size += opt_hdr_len; |
| 894 | } |
| 895 | pkt->length -= total_hdr_size; |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | /** |
| 900 | * extract_header() - Extract IPC Router header |
| 901 | * @pkt: Packet from which the header has to be extraced. |
| 902 | * |
| 903 | * @return: 0 on success, standard Linux error codes on failure. |
| 904 | * |
| 905 | * This function will check if the header version is v1 or v2 and invoke |
| 906 | * the corresponding helper function to extract the IPC Router header. |
| 907 | */ |
| 908 | static int extract_header(struct rr_packet *pkt) |
| 909 | { |
| 910 | struct sk_buff *temp_skb; |
| 911 | int ret; |
| 912 | |
| 913 | if (!pkt) { |
| 914 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 915 | return -EINVAL; |
| 916 | } |
| 917 | |
| 918 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 919 | if (!temp_skb || !temp_skb->data) { |
| 920 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 921 | return -EINVAL; |
| 922 | } |
| 923 | |
| 924 | if (temp_skb->data[0] == IPC_ROUTER_V1) { |
| 925 | ret = extract_header_v1(pkt, temp_skb); |
| 926 | } else if (temp_skb->data[0] == IPC_ROUTER_V2) { |
| 927 | ret = extract_header_v2(pkt, temp_skb); |
| 928 | } else { |
| 929 | IPC_RTR_ERR("%s: Invalid Header version %02x\n", |
| 930 | __func__, temp_skb->data[0]); |
| 931 | print_hex_dump(KERN_ERR, "Header: ", DUMP_PREFIX_ADDRESS, |
| 932 | 16, 1, temp_skb->data, pkt->length, true); |
| 933 | return -EINVAL; |
| 934 | } |
| 935 | return ret; |
| 936 | } |
| 937 | |
| 938 | /** |
| 939 | * calc_tx_header_size() - Calculate header size to be reserved in SKB |
| 940 | * @pkt: Packet in which the space for header has to be reserved. |
| 941 | * @dst_xprt_info: XPRT through which the destination is reachable. |
| 942 | * |
| 943 | * @return: required header size on success, |
| 944 | * starndard Linux error codes on failure. |
| 945 | * |
| 946 | * This function is used to calculate the header size that has to be reserved |
| 947 | * in a transmit SKB. The header size is calculated based on the XPRT through |
| 948 | * which the destination node is reachable. |
| 949 | */ |
| 950 | static int calc_tx_header_size(struct rr_packet *pkt, |
| 951 | struct msm_ipc_router_xprt_info *dst_xprt_info) |
| 952 | { |
| 953 | int hdr_size = 0; |
| 954 | int xprt_version = 0; |
| 955 | struct msm_ipc_router_xprt_info *xprt_info = dst_xprt_info; |
| 956 | |
| 957 | if (!pkt) { |
| 958 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 959 | return -EINVAL; |
| 960 | } |
| 961 | |
| 962 | if (xprt_info) |
| 963 | xprt_version = xprt_info->xprt->get_version(xprt_info->xprt); |
| 964 | |
| 965 | if (xprt_version == IPC_ROUTER_V1) { |
| 966 | pkt->hdr.version = IPC_ROUTER_V1; |
| 967 | hdr_size = sizeof(struct rr_header_v1); |
| 968 | } else if (xprt_version == IPC_ROUTER_V2) { |
| 969 | pkt->hdr.version = IPC_ROUTER_V2; |
| 970 | hdr_size = sizeof(struct rr_header_v2) + pkt->opt_hdr.len; |
| 971 | } else { |
| 972 | IPC_RTR_ERR("%s: Invalid xprt_version %d\n", |
| 973 | __func__, xprt_version); |
| 974 | hdr_size = -EINVAL; |
| 975 | } |
| 976 | |
| 977 | return hdr_size; |
| 978 | } |
| 979 | |
| 980 | /** |
| 981 | * calc_rx_header_size() - Calculate the RX header size |
| 982 | * @xprt_info: XPRT info of the received message. |
| 983 | * |
| 984 | * @return: valid header size on success, INT_MAX on failure. |
| 985 | */ |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 986 | static int calc_rx_header_size(struct msm_ipc_router_xprt_info *xprt_info, |
| 987 | struct rr_packet *pkt) |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 988 | { |
| 989 | int xprt_version = 0; |
| 990 | int hdr_size = INT_MAX; |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 991 | struct sk_buff *temp_skb; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 992 | |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 993 | if (xprt_info && xprt_info->initialized) { |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 994 | xprt_version = xprt_info->xprt->get_version(xprt_info->xprt); |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 995 | } else { |
| 996 | if (!pkt) { |
| 997 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 998 | return -EINVAL; |
| 999 | } |
| 1000 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 1001 | if (!temp_skb || !temp_skb->data) { |
| 1002 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 1003 | return -EINVAL; |
| 1004 | } |
| 1005 | xprt_version = temp_skb->data[0]; |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 1006 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1007 | |
| 1008 | if (xprt_version == IPC_ROUTER_V1) |
| 1009 | hdr_size = sizeof(struct rr_header_v1); |
| 1010 | else if (xprt_version == IPC_ROUTER_V2) |
| 1011 | hdr_size = sizeof(struct rr_header_v2); |
| 1012 | return hdr_size; |
| 1013 | } |
| 1014 | |
| 1015 | /** |
| 1016 | * prepend_header_v1() - Prepend IPC Router header of version 1 |
| 1017 | * @pkt: Packet structure which contains the header info to be prepended. |
| 1018 | * @hdr_size: Size of the header |
| 1019 | * |
| 1020 | * @return: 0 on success, standard Linux error codes on failure. |
| 1021 | */ |
| 1022 | static int prepend_header_v1(struct rr_packet *pkt, int hdr_size) |
| 1023 | { |
| 1024 | struct sk_buff *temp_skb; |
| 1025 | struct rr_header_v1 *hdr; |
| 1026 | |
| 1027 | if (!pkt || hdr_size <= 0) { |
| 1028 | IPC_RTR_ERR("%s: Invalid input parameters\n", __func__); |
| 1029 | return -EINVAL; |
| 1030 | } |
| 1031 | |
| 1032 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 1033 | if (!temp_skb || !temp_skb->data) { |
| 1034 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 1035 | return -EINVAL; |
| 1036 | } |
| 1037 | |
| 1038 | if (skb_headroom(temp_skb) < hdr_size) { |
| 1039 | temp_skb = alloc_skb(hdr_size, GFP_KERNEL); |
| 1040 | if (!temp_skb) { |
| 1041 | IPC_RTR_ERR("%s: Could not allocate SKB of size %d\n", |
| 1042 | __func__, hdr_size); |
| 1043 | return -ENOMEM; |
| 1044 | } |
| 1045 | skb_reserve(temp_skb, hdr_size); |
| 1046 | } |
| 1047 | |
| 1048 | hdr = (struct rr_header_v1 *)skb_push(temp_skb, hdr_size); |
| 1049 | memcpy(hdr, &pkt->hdr, hdr_size); |
| 1050 | if (temp_skb != skb_peek(pkt->pkt_fragment_q)) |
| 1051 | skb_queue_head(pkt->pkt_fragment_q, temp_skb); |
| 1052 | pkt->length += hdr_size; |
| 1053 | return 0; |
| 1054 | } |
| 1055 | |
| 1056 | /** |
| 1057 | * prepend_header_v2() - Prepend IPC Router header of version 2 |
| 1058 | * @pkt: Packet structure which contains the header info to be prepended. |
| 1059 | * @hdr_size: Size of the header |
| 1060 | * |
| 1061 | * @return: 0 on success, standard Linux error codes on failure. |
| 1062 | */ |
| 1063 | static int prepend_header_v2(struct rr_packet *pkt, int hdr_size) |
| 1064 | { |
| 1065 | struct sk_buff *temp_skb; |
| 1066 | struct rr_header_v2 *hdr; |
| 1067 | |
| 1068 | if (!pkt || hdr_size <= 0) { |
| 1069 | IPC_RTR_ERR("%s: Invalid input parameters\n", __func__); |
| 1070 | return -EINVAL; |
| 1071 | } |
| 1072 | |
| 1073 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 1074 | if (!temp_skb || !temp_skb->data) { |
| 1075 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 1076 | return -EINVAL; |
| 1077 | } |
| 1078 | |
| 1079 | if (skb_headroom(temp_skb) < hdr_size) { |
| 1080 | temp_skb = alloc_skb(hdr_size, GFP_KERNEL); |
| 1081 | if (!temp_skb) { |
| 1082 | IPC_RTR_ERR("%s: Could not allocate SKB of size %d\n", |
| 1083 | __func__, hdr_size); |
| 1084 | return -ENOMEM; |
| 1085 | } |
| 1086 | skb_reserve(temp_skb, hdr_size); |
| 1087 | } |
| 1088 | |
| 1089 | hdr = (struct rr_header_v2 *)skb_push(temp_skb, hdr_size); |
| 1090 | hdr->version = (u8)pkt->hdr.version; |
| 1091 | hdr->type = (u8)pkt->hdr.type; |
| 1092 | hdr->control_flag = (u8)pkt->hdr.control_flag; |
| 1093 | hdr->size = (u32)pkt->hdr.size; |
| 1094 | hdr->src_node_id = (u16)pkt->hdr.src_node_id; |
| 1095 | hdr->src_port_id = (u16)pkt->hdr.src_port_id; |
| 1096 | hdr->dst_node_id = (u16)pkt->hdr.dst_node_id; |
| 1097 | hdr->dst_port_id = (u16)pkt->hdr.dst_port_id; |
| 1098 | if (pkt->opt_hdr.len > 0) { |
| 1099 | hdr->opt_len = pkt->opt_hdr.len / IPCR_WORD_SIZE; |
| 1100 | memcpy(hdr + sizeof(*hdr), pkt->opt_hdr.data, pkt->opt_hdr.len); |
| 1101 | } else { |
| 1102 | hdr->opt_len = 0; |
| 1103 | } |
| 1104 | if (temp_skb != skb_peek(pkt->pkt_fragment_q)) |
| 1105 | skb_queue_head(pkt->pkt_fragment_q, temp_skb); |
| 1106 | pkt->length += hdr_size; |
| 1107 | return 0; |
| 1108 | } |
| 1109 | |
| 1110 | /** |
| 1111 | * prepend_header() - Prepend IPC Router header |
| 1112 | * @pkt: Packet structure which contains the header info to be prepended. |
| 1113 | * @xprt_info: XPRT through which the packet is transmitted. |
| 1114 | * |
| 1115 | * @return: 0 on success, standard Linux error codes on failure. |
| 1116 | * |
| 1117 | * This function prepends the header to the packet to be transmitted. The |
| 1118 | * IPC Router header version to be prepended depends on the XPRT through |
| 1119 | * which the destination is reachable. |
| 1120 | */ |
| 1121 | static int prepend_header(struct rr_packet *pkt, |
| 1122 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1123 | { |
| 1124 | int hdr_size; |
| 1125 | struct sk_buff *temp_skb; |
| 1126 | |
| 1127 | if (!pkt) { |
| 1128 | IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| 1129 | return -EINVAL; |
| 1130 | } |
| 1131 | |
| 1132 | temp_skb = skb_peek(pkt->pkt_fragment_q); |
| 1133 | if (!temp_skb || !temp_skb->data) { |
| 1134 | IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| 1135 | return -EINVAL; |
| 1136 | } |
| 1137 | |
| 1138 | hdr_size = calc_tx_header_size(pkt, xprt_info); |
| 1139 | if (hdr_size <= 0) |
| 1140 | return hdr_size; |
| 1141 | |
| 1142 | if (pkt->hdr.version == IPC_ROUTER_V1) |
| 1143 | return prepend_header_v1(pkt, hdr_size); |
| 1144 | else if (pkt->hdr.version == IPC_ROUTER_V2) |
| 1145 | return prepend_header_v2(pkt, hdr_size); |
| 1146 | else |
| 1147 | return -EINVAL; |
| 1148 | } |
| 1149 | |
| 1150 | /** |
| 1151 | * defragment_pkt() - Defragment and linearize the packet |
| 1152 | * @pkt: Packet to be linearized. |
| 1153 | * |
| 1154 | * @return: 0 on success, standard Linux error codes on failure. |
| 1155 | * |
| 1156 | * Some packets contain fragments of data over multiple SKBs. If an XPRT |
| 1157 | * does not supported fragmented writes, linearize multiple SKBs into one |
| 1158 | * single SKB. |
| 1159 | */ |
| 1160 | static int defragment_pkt(struct rr_packet *pkt) |
| 1161 | { |
| 1162 | struct sk_buff *dst_skb, *src_skb, *temp_skb; |
| 1163 | int offset = 0, buf_len = 0, copy_len; |
| 1164 | void *buf; |
| 1165 | int align_size; |
| 1166 | |
| 1167 | if (!pkt || pkt->length <= 0) { |
| 1168 | IPC_RTR_ERR("%s: Invalid PKT\n", __func__); |
| 1169 | return -EINVAL; |
| 1170 | } |
| 1171 | |
| 1172 | if (skb_queue_len(pkt->pkt_fragment_q) == 1) |
| 1173 | return 0; |
| 1174 | |
| 1175 | align_size = ALIGN_SIZE(pkt->length); |
| 1176 | dst_skb = alloc_skb(pkt->length + align_size, GFP_KERNEL); |
| 1177 | if (!dst_skb) { |
| 1178 | IPC_RTR_ERR("%s: could not allocate one skb of size %d\n", |
| 1179 | __func__, pkt->length); |
| 1180 | return -ENOMEM; |
| 1181 | } |
| 1182 | buf = skb_put(dst_skb, pkt->length); |
| 1183 | buf_len = pkt->length; |
| 1184 | |
| 1185 | skb_queue_walk(pkt->pkt_fragment_q, src_skb) { |
| 1186 | copy_len = buf_len < src_skb->len ? buf_len : src_skb->len; |
| 1187 | memcpy(buf + offset, src_skb->data, copy_len); |
| 1188 | offset += copy_len; |
| 1189 | buf_len -= copy_len; |
| 1190 | } |
| 1191 | |
| 1192 | while (!skb_queue_empty(pkt->pkt_fragment_q)) { |
| 1193 | temp_skb = skb_dequeue(pkt->pkt_fragment_q); |
| 1194 | kfree_skb(temp_skb); |
| 1195 | } |
| 1196 | skb_queue_tail(pkt->pkt_fragment_q, dst_skb); |
| 1197 | return 0; |
| 1198 | } |
| 1199 | |
| 1200 | static int post_pkt_to_port(struct msm_ipc_port *port_ptr, |
| 1201 | struct rr_packet *pkt, int clone) |
| 1202 | { |
| 1203 | struct rr_packet *temp_pkt = pkt; |
| 1204 | void (*notify)(unsigned int event, void *oob_data, |
| 1205 | size_t oob_data_len, void *priv); |
| 1206 | void (*data_ready)(struct sock *sk) = NULL; |
| 1207 | struct sock *sk; |
| 1208 | u32 pkt_type; |
| 1209 | |
| 1210 | if (unlikely(!port_ptr || !pkt)) |
| 1211 | return -EINVAL; |
| 1212 | |
| 1213 | if (clone) { |
| 1214 | temp_pkt = clone_pkt(pkt); |
| 1215 | if (!temp_pkt) { |
| 1216 | IPC_RTR_ERR( |
| 1217 | "%s: Error cloning packet for port %08x:%08x\n", |
| 1218 | __func__, port_ptr->this_port.node_id, |
| 1219 | port_ptr->this_port.port_id); |
| 1220 | return -ENOMEM; |
| 1221 | } |
| 1222 | } |
| 1223 | |
| 1224 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 1225 | if (pkt->ws_need) |
| 1226 | __pm_stay_awake(port_ptr->port_rx_ws); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1227 | list_add_tail(&temp_pkt->list, &port_ptr->port_rx_q); |
| 1228 | wake_up(&port_ptr->port_rx_wait_q); |
| 1229 | notify = port_ptr->notify; |
| 1230 | pkt_type = temp_pkt->hdr.type; |
| 1231 | sk = (struct sock *)port_ptr->endpoint; |
| 1232 | if (sk) { |
| 1233 | read_lock(&sk->sk_callback_lock); |
| 1234 | data_ready = sk->sk_data_ready; |
| 1235 | read_unlock(&sk->sk_callback_lock); |
| 1236 | } |
| 1237 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 1238 | if (notify) |
| 1239 | notify(pkt_type, NULL, 0, port_ptr->priv); |
| 1240 | else if (sk && data_ready) |
| 1241 | data_ready(sk); |
| 1242 | |
| 1243 | return 0; |
| 1244 | } |
| 1245 | |
| 1246 | /** |
| 1247 | * ipc_router_peek_pkt_size() - Peek into the packet header to get potential |
| 1248 | * packet size |
| 1249 | * @data: Starting address of the packet which points to router header. |
| 1250 | * |
| 1251 | * @returns: potential packet size on success, < 0 on error. |
| 1252 | * |
| 1253 | * This function is used by the underlying transport abstraction layer to |
| 1254 | * peek into the potential packet size of an incoming packet. This information |
| 1255 | * is used to perform link layer fragmentation and re-assembly |
| 1256 | */ |
| 1257 | int ipc_router_peek_pkt_size(char *data) |
| 1258 | { |
| 1259 | int size; |
| 1260 | |
| 1261 | if (!data) { |
| 1262 | pr_err("%s: NULL PKT\n", __func__); |
| 1263 | return -EINVAL; |
| 1264 | } |
| 1265 | |
| 1266 | if (data[0] == IPC_ROUTER_V1) |
| 1267 | size = ((struct rr_header_v1 *)data)->size + |
| 1268 | sizeof(struct rr_header_v1); |
| 1269 | else if (data[0] == IPC_ROUTER_V2) |
| 1270 | size = ((struct rr_header_v2 *)data)->size + |
| 1271 | ((struct rr_header_v2 *)data)->opt_len * IPCR_WORD_SIZE |
| 1272 | + sizeof(struct rr_header_v2); |
| 1273 | else |
| 1274 | return -EINVAL; |
| 1275 | |
| 1276 | size += ALIGN_SIZE(size); |
| 1277 | return size; |
| 1278 | } |
| 1279 | |
| 1280 | static int post_control_ports(struct rr_packet *pkt) |
| 1281 | { |
| 1282 | struct msm_ipc_port *port_ptr; |
| 1283 | |
| 1284 | if (!pkt) |
| 1285 | return -EINVAL; |
| 1286 | |
| 1287 | down_read(&control_ports_lock_lha5); |
| 1288 | list_for_each_entry(port_ptr, &control_ports, list) |
| 1289 | post_pkt_to_port(port_ptr, pkt, 1); |
| 1290 | up_read(&control_ports_lock_lha5); |
| 1291 | return 0; |
| 1292 | } |
| 1293 | |
| 1294 | static u32 allocate_port_id(void) |
| 1295 | { |
| 1296 | u32 port_id = 0, prev_port_id, key; |
| 1297 | struct msm_ipc_port *port_ptr; |
| 1298 | |
| 1299 | mutex_lock(&next_port_id_lock_lhc1); |
| 1300 | prev_port_id = next_port_id; |
| 1301 | down_read(&local_ports_lock_lhc2); |
| 1302 | do { |
| 1303 | next_port_id++; |
| 1304 | if ((next_port_id & IPC_ROUTER_ADDRESS) == IPC_ROUTER_ADDRESS) |
| 1305 | next_port_id = 1; |
| 1306 | |
| 1307 | key = (next_port_id & (LP_HASH_SIZE - 1)); |
| 1308 | if (list_empty(&local_ports[key])) { |
| 1309 | port_id = next_port_id; |
| 1310 | break; |
| 1311 | } |
| 1312 | list_for_each_entry(port_ptr, &local_ports[key], list) { |
| 1313 | if (port_ptr->this_port.port_id == next_port_id) { |
| 1314 | port_id = next_port_id; |
| 1315 | break; |
| 1316 | } |
| 1317 | } |
| 1318 | if (!port_id) { |
| 1319 | port_id = next_port_id; |
| 1320 | break; |
| 1321 | } |
| 1322 | port_id = 0; |
| 1323 | } while (next_port_id != prev_port_id); |
| 1324 | up_read(&local_ports_lock_lhc2); |
| 1325 | mutex_unlock(&next_port_id_lock_lhc1); |
| 1326 | |
| 1327 | return port_id; |
| 1328 | } |
| 1329 | |
| 1330 | void msm_ipc_router_add_local_port(struct msm_ipc_port *port_ptr) |
| 1331 | { |
| 1332 | u32 key; |
| 1333 | |
| 1334 | if (!port_ptr) |
| 1335 | return; |
| 1336 | |
| 1337 | key = (port_ptr->this_port.port_id & (LP_HASH_SIZE - 1)); |
| 1338 | down_write(&local_ports_lock_lhc2); |
| 1339 | list_add_tail(&port_ptr->list, &local_ports[key]); |
| 1340 | up_write(&local_ports_lock_lhc2); |
| 1341 | } |
| 1342 | |
| 1343 | /** |
| 1344 | * msm_ipc_router_create_raw_port() - Create an IPC Router port |
| 1345 | * @endpoint: User-space space socket information to be cached. |
| 1346 | * @notify: Function to notify incoming events on the port. |
| 1347 | * @event: Event ID to be handled. |
| 1348 | * @oob_data: Any out-of-band data associated with the event. |
| 1349 | * @oob_data_len: Size of the out-of-band data, if valid. |
| 1350 | * @priv: Private data registered during the port creation. |
| 1351 | * @priv: Private Data to be passed during the event notification. |
| 1352 | * |
| 1353 | * @return: Valid pointer to port on success, NULL on failure. |
| 1354 | * |
| 1355 | * This function is used to create an IPC Router port. The port is used for |
| 1356 | * communication locally or outside the subsystem. |
| 1357 | */ |
| 1358 | struct msm_ipc_port * |
| 1359 | msm_ipc_router_create_raw_port(void *endpoint, |
| 1360 | void (*notify)(unsigned int event, |
| 1361 | void *oob_data, |
| 1362 | size_t oob_data_len, void *priv), |
| 1363 | void *priv) |
| 1364 | { |
| 1365 | struct msm_ipc_port *port_ptr; |
| 1366 | |
| 1367 | port_ptr = kzalloc(sizeof(*port_ptr), GFP_KERNEL); |
| 1368 | if (!port_ptr) |
| 1369 | return NULL; |
| 1370 | |
| 1371 | port_ptr->this_port.node_id = IPC_ROUTER_NID_LOCAL; |
| 1372 | port_ptr->this_port.port_id = allocate_port_id(); |
| 1373 | if (!port_ptr->this_port.port_id) { |
| 1374 | IPC_RTR_ERR("%s: All port ids are in use\n", __func__); |
| 1375 | kfree(port_ptr); |
| 1376 | return NULL; |
| 1377 | } |
| 1378 | |
| 1379 | mutex_init(&port_ptr->port_lock_lhc3); |
| 1380 | INIT_LIST_HEAD(&port_ptr->port_rx_q); |
| 1381 | mutex_init(&port_ptr->port_rx_q_lock_lhc3); |
| 1382 | init_waitqueue_head(&port_ptr->port_rx_wait_q); |
| 1383 | snprintf(port_ptr->rx_ws_name, MAX_WS_NAME_SZ, |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame] | 1384 | "ipc%08x_%d_%s", |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1385 | port_ptr->this_port.port_id, |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame] | 1386 | task_pid_nr(current), |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 1387 | current->comm); |
| 1388 | port_ptr->port_rx_ws = wakeup_source_register(port_ptr->rx_ws_name); |
| 1389 | if (!port_ptr->port_rx_ws) { |
| 1390 | kfree(port_ptr); |
| 1391 | return NULL; |
| 1392 | } |
| 1393 | init_waitqueue_head(&port_ptr->port_tx_wait_q); |
| 1394 | kref_init(&port_ptr->ref); |
| 1395 | |
| 1396 | port_ptr->endpoint = endpoint; |
| 1397 | port_ptr->notify = notify; |
| 1398 | port_ptr->priv = priv; |
| 1399 | |
| 1400 | msm_ipc_router_add_local_port(port_ptr); |
| 1401 | if (endpoint) |
| 1402 | sock_hold(ipc_port_sk(endpoint)); |
| 1403 | return port_ptr; |
| 1404 | } |
| 1405 | |
| 1406 | /** |
| 1407 | * ipc_router_get_port_ref() - Get a reference to the local port |
| 1408 | * @port_id: Port ID of the local port for which reference is get. |
| 1409 | * |
| 1410 | * @return: If port is found, a reference to the port is returned. |
| 1411 | * Else NULL is returned. |
| 1412 | */ |
| 1413 | static struct msm_ipc_port *ipc_router_get_port_ref(u32 port_id) |
| 1414 | { |
| 1415 | int key = (port_id & (LP_HASH_SIZE - 1)); |
| 1416 | struct msm_ipc_port *port_ptr; |
| 1417 | |
| 1418 | down_read(&local_ports_lock_lhc2); |
| 1419 | list_for_each_entry(port_ptr, &local_ports[key], list) { |
| 1420 | if (port_ptr->this_port.port_id == port_id) { |
| 1421 | kref_get(&port_ptr->ref); |
| 1422 | up_read(&local_ports_lock_lhc2); |
| 1423 | return port_ptr; |
| 1424 | } |
| 1425 | } |
| 1426 | up_read(&local_ports_lock_lhc2); |
| 1427 | return NULL; |
| 1428 | } |
| 1429 | |
| 1430 | /** |
| 1431 | * ipc_router_release_port() - Cleanup and release the port |
| 1432 | * @ref: Reference to the port. |
| 1433 | * |
| 1434 | * This function is called when all references to the port are released. |
| 1435 | */ |
| 1436 | void ipc_router_release_port(struct kref *ref) |
| 1437 | { |
| 1438 | struct rr_packet *pkt, *temp_pkt; |
| 1439 | struct msm_ipc_port *port_ptr = |
| 1440 | container_of(ref, struct msm_ipc_port, ref); |
| 1441 | |
| 1442 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 1443 | list_for_each_entry_safe(pkt, temp_pkt, &port_ptr->port_rx_q, list) { |
| 1444 | list_del(&pkt->list); |
| 1445 | release_pkt(pkt); |
| 1446 | } |
| 1447 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 1448 | wakeup_source_unregister(port_ptr->port_rx_ws); |
| 1449 | if (port_ptr->endpoint) |
| 1450 | sock_put(ipc_port_sk(port_ptr->endpoint)); |
| 1451 | kfree(port_ptr); |
| 1452 | } |
| 1453 | |
| 1454 | /** |
| 1455 | * ipc_router_get_rport_ref()- Get reference to the remote port |
| 1456 | * @node_id: Node ID corresponding to the remote port. |
| 1457 | * @port_id: Port ID corresponding to the remote port. |
| 1458 | * |
| 1459 | * @return: a reference to the remote port on success, NULL on failure. |
| 1460 | */ |
| 1461 | static struct msm_ipc_router_remote_port *ipc_router_get_rport_ref( |
| 1462 | u32 node_id, u32 port_id) |
| 1463 | { |
| 1464 | struct msm_ipc_router_remote_port *rport_ptr; |
| 1465 | struct msm_ipc_routing_table_entry *rt_entry; |
| 1466 | int key = (port_id & (RP_HASH_SIZE - 1)); |
| 1467 | |
| 1468 | rt_entry = ipc_router_get_rtentry_ref(node_id); |
| 1469 | if (!rt_entry) { |
| 1470 | IPC_RTR_ERR("%s: Node is not up\n", __func__); |
| 1471 | return NULL; |
| 1472 | } |
| 1473 | |
| 1474 | down_read(&rt_entry->lock_lha4); |
| 1475 | list_for_each_entry(rport_ptr, |
| 1476 | &rt_entry->remote_port_list[key], list) { |
| 1477 | if (rport_ptr->port_id == port_id) { |
| 1478 | kref_get(&rport_ptr->ref); |
| 1479 | goto out_lookup_rmt_port1; |
| 1480 | } |
| 1481 | } |
| 1482 | rport_ptr = NULL; |
| 1483 | out_lookup_rmt_port1: |
| 1484 | up_read(&rt_entry->lock_lha4); |
| 1485 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 1486 | return rport_ptr; |
| 1487 | } |
| 1488 | |
| 1489 | /** |
| 1490 | * ipc_router_create_rport() - Create a remote port |
| 1491 | * @node_id: Node ID corresponding to the remote port. |
| 1492 | * @port_id: Port ID corresponding to the remote port. |
| 1493 | * @xprt_info: XPRT through which the concerned node is reachable. |
| 1494 | * |
| 1495 | * @return: a reference to the remote port on success, NULL on failure. |
| 1496 | */ |
| 1497 | static struct msm_ipc_router_remote_port *ipc_router_create_rport( |
| 1498 | u32 node_id, u32 port_id, |
| 1499 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1500 | { |
| 1501 | struct msm_ipc_router_remote_port *rport_ptr; |
| 1502 | struct msm_ipc_routing_table_entry *rt_entry; |
| 1503 | int key = (port_id & (RP_HASH_SIZE - 1)); |
| 1504 | |
| 1505 | rt_entry = create_routing_table_entry(node_id, xprt_info); |
| 1506 | if (!rt_entry) { |
| 1507 | IPC_RTR_ERR("%s: Node cannot be created\n", __func__); |
| 1508 | return NULL; |
| 1509 | } |
| 1510 | |
| 1511 | down_write(&rt_entry->lock_lha4); |
| 1512 | list_for_each_entry(rport_ptr, |
| 1513 | &rt_entry->remote_port_list[key], list) { |
| 1514 | if (rport_ptr->port_id == port_id) |
| 1515 | goto out_create_rmt_port1; |
| 1516 | } |
| 1517 | |
| 1518 | rport_ptr = kmalloc(sizeof(*rport_ptr), GFP_KERNEL); |
| 1519 | if (!rport_ptr) { |
| 1520 | IPC_RTR_ERR("%s: Remote port alloc failed\n", __func__); |
| 1521 | goto out_create_rmt_port2; |
| 1522 | } |
| 1523 | rport_ptr->port_id = port_id; |
| 1524 | rport_ptr->node_id = node_id; |
| 1525 | rport_ptr->status = VALID; |
| 1526 | rport_ptr->sec_rule = NULL; |
| 1527 | rport_ptr->server = NULL; |
| 1528 | rport_ptr->tx_quota_cnt = 0; |
| 1529 | kref_init(&rport_ptr->ref); |
| 1530 | mutex_init(&rport_ptr->rport_lock_lhb2); |
| 1531 | INIT_LIST_HEAD(&rport_ptr->resume_tx_port_list); |
| 1532 | INIT_LIST_HEAD(&rport_ptr->conn_info_list); |
| 1533 | list_add_tail(&rport_ptr->list, |
| 1534 | &rt_entry->remote_port_list[key]); |
| 1535 | out_create_rmt_port1: |
| 1536 | kref_get(&rport_ptr->ref); |
| 1537 | out_create_rmt_port2: |
| 1538 | up_write(&rt_entry->lock_lha4); |
| 1539 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 1540 | return rport_ptr; |
| 1541 | } |
| 1542 | |
| 1543 | /** |
| 1544 | * msm_ipc_router_free_resume_tx_port() - Free the resume_tx ports |
| 1545 | * @rport_ptr: Pointer to the remote port. |
| 1546 | * |
| 1547 | * This function deletes all the resume_tx ports associated with a remote port |
| 1548 | * and frees the memory allocated to each resume_tx port. |
| 1549 | * |
| 1550 | * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| 1551 | */ |
| 1552 | static void msm_ipc_router_free_resume_tx_port( |
| 1553 | struct msm_ipc_router_remote_port *rport_ptr) |
| 1554 | { |
| 1555 | struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| 1556 | |
| 1557 | list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| 1558 | &rport_ptr->resume_tx_port_list, list) { |
| 1559 | list_del(&rtx_port->list); |
| 1560 | kfree(rtx_port); |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | /** |
| 1565 | * msm_ipc_router_lookup_resume_tx_port() - Lookup resume_tx port list |
| 1566 | * @rport_ptr: Remote port whose resume_tx port list needs to be looked. |
| 1567 | * @port_id: Port ID which needs to be looked from the list. |
| 1568 | * |
| 1569 | * return 1 if the port_id is found in the list, else 0. |
| 1570 | * |
| 1571 | * This function is used to lookup the existence of a local port in |
| 1572 | * remote port's resume_tx list. This function is used to ensure that |
| 1573 | * the same port is not added to the remote_port's resume_tx list repeatedly. |
| 1574 | * |
| 1575 | * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| 1576 | */ |
| 1577 | static int msm_ipc_router_lookup_resume_tx_port( |
| 1578 | struct msm_ipc_router_remote_port *rport_ptr, u32 port_id) |
| 1579 | { |
| 1580 | struct msm_ipc_resume_tx_port *rtx_port; |
| 1581 | |
| 1582 | list_for_each_entry(rtx_port, &rport_ptr->resume_tx_port_list, list) { |
| 1583 | if (port_id == rtx_port->port_id) |
| 1584 | return 1; |
| 1585 | } |
| 1586 | return 0; |
| 1587 | } |
| 1588 | |
| 1589 | /** |
| 1590 | * ipc_router_dummy_write_space() - Dummy write space available callback |
| 1591 | * @sk: Socket pointer for which the callback is called. |
| 1592 | */ |
| 1593 | void ipc_router_dummy_write_space(struct sock *sk) |
| 1594 | { |
| 1595 | } |
| 1596 | |
| 1597 | /** |
| 1598 | * post_resume_tx() - Post the resume_tx event |
| 1599 | * @rport_ptr: Pointer to the remote port |
| 1600 | * @pkt : The data packet that is received on a resume_tx event |
| 1601 | * @msg: Out of band data to be passed to kernel drivers |
| 1602 | * |
| 1603 | * This function informs about the reception of the resume_tx message from a |
| 1604 | * remote port pointed by rport_ptr to all the local ports that are in the |
| 1605 | * resume_tx_ports_list of this remote port. On posting the information, this |
| 1606 | * function sequentially deletes each entry in the resume_tx_port_list of the |
| 1607 | * remote port. |
| 1608 | * |
| 1609 | * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| 1610 | */ |
| 1611 | static void post_resume_tx(struct msm_ipc_router_remote_port *rport_ptr, |
| 1612 | struct rr_packet *pkt, union rr_control_msg *msg) |
| 1613 | { |
| 1614 | struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| 1615 | struct msm_ipc_port *local_port; |
| 1616 | struct sock *sk; |
| 1617 | void (*write_space)(struct sock *sk) = NULL; |
| 1618 | |
| 1619 | list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| 1620 | &rport_ptr->resume_tx_port_list, list) { |
| 1621 | local_port = ipc_router_get_port_ref(rtx_port->port_id); |
| 1622 | if (local_port && local_port->notify) { |
| 1623 | wake_up(&local_port->port_tx_wait_q); |
| 1624 | local_port->notify(IPC_ROUTER_CTRL_CMD_RESUME_TX, msg, |
| 1625 | sizeof(*msg), local_port->priv); |
| 1626 | } else if (local_port) { |
| 1627 | wake_up(&local_port->port_tx_wait_q); |
| 1628 | sk = ipc_port_sk(local_port->endpoint); |
| 1629 | if (sk) { |
| 1630 | read_lock(&sk->sk_callback_lock); |
| 1631 | write_space = sk->sk_write_space; |
| 1632 | read_unlock(&sk->sk_callback_lock); |
| 1633 | } |
| 1634 | if (write_space && |
| 1635 | write_space != ipc_router_dummy_write_space) |
| 1636 | write_space(sk); |
| 1637 | else |
| 1638 | post_pkt_to_port(local_port, pkt, 1); |
| 1639 | } else { |
| 1640 | IPC_RTR_ERR("%s: Local Port %d not Found", |
| 1641 | __func__, rtx_port->port_id); |
| 1642 | } |
| 1643 | if (local_port) |
| 1644 | kref_put(&local_port->ref, ipc_router_release_port); |
| 1645 | list_del(&rtx_port->list); |
| 1646 | kfree(rtx_port); |
| 1647 | } |
| 1648 | } |
| 1649 | |
| 1650 | /** |
| 1651 | * signal_rport_exit() - Signal the local ports of remote port exit |
| 1652 | * @rport_ptr: Remote port that is exiting. |
| 1653 | * |
| 1654 | * This function is used to signal the local ports that are waiting |
| 1655 | * to resume transmission to a remote port that is exiting. |
| 1656 | */ |
| 1657 | static void signal_rport_exit(struct msm_ipc_router_remote_port *rport_ptr) |
| 1658 | { |
| 1659 | struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| 1660 | struct msm_ipc_port *local_port; |
| 1661 | |
| 1662 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 1663 | rport_ptr->status = RESET; |
| 1664 | list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| 1665 | &rport_ptr->resume_tx_port_list, list) { |
| 1666 | local_port = ipc_router_get_port_ref(rtx_port->port_id); |
| 1667 | if (local_port) { |
| 1668 | wake_up(&local_port->port_tx_wait_q); |
| 1669 | kref_put(&local_port->ref, ipc_router_release_port); |
| 1670 | } |
| 1671 | list_del(&rtx_port->list); |
| 1672 | kfree(rtx_port); |
| 1673 | } |
| 1674 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 1675 | } |
| 1676 | |
| 1677 | /** |
| 1678 | * ipc_router_release_rport() - Cleanup and release the remote port |
| 1679 | * @ref: Reference to the remote port. |
| 1680 | * |
| 1681 | * This function is called when all references to the remote port are released. |
| 1682 | */ |
| 1683 | static void ipc_router_release_rport(struct kref *ref) |
| 1684 | { |
| 1685 | struct msm_ipc_router_remote_port *rport_ptr = |
| 1686 | container_of(ref, struct msm_ipc_router_remote_port, ref); |
| 1687 | |
| 1688 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 1689 | msm_ipc_router_free_resume_tx_port(rport_ptr); |
| 1690 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 1691 | kfree(rport_ptr); |
| 1692 | } |
| 1693 | |
| 1694 | /** |
| 1695 | * ipc_router_destroy_rport() - Destroy the remote port |
| 1696 | * @rport_ptr: Pointer to the remote port to be destroyed. |
| 1697 | */ |
| 1698 | static void ipc_router_destroy_rport( |
| 1699 | struct msm_ipc_router_remote_port *rport_ptr) |
| 1700 | { |
| 1701 | u32 node_id; |
| 1702 | struct msm_ipc_routing_table_entry *rt_entry; |
| 1703 | |
| 1704 | if (!rport_ptr) |
| 1705 | return; |
| 1706 | |
| 1707 | node_id = rport_ptr->node_id; |
| 1708 | rt_entry = ipc_router_get_rtentry_ref(node_id); |
| 1709 | if (!rt_entry) { |
| 1710 | IPC_RTR_ERR("%s: Node %d is not up\n", __func__, node_id); |
| 1711 | return; |
| 1712 | } |
| 1713 | down_write(&rt_entry->lock_lha4); |
| 1714 | list_del(&rport_ptr->list); |
| 1715 | up_write(&rt_entry->lock_lha4); |
| 1716 | signal_rport_exit(rport_ptr); |
| 1717 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 1718 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 1719 | } |
| 1720 | |
| 1721 | /** |
| 1722 | * msm_ipc_router_lookup_server() - Lookup server information |
| 1723 | * @service: Service ID of the server info to be looked up. |
| 1724 | * @instance: Instance ID of the server info to be looked up. |
| 1725 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1726 | * @port_id: Port ID within the node in which the server is hosted. |
| 1727 | * |
| 1728 | * @return: If found Pointer to server structure, else NULL. |
| 1729 | * |
| 1730 | * Note1: Lock the server_list_lock_lha2 before accessing this function. |
| 1731 | * Note2: If the <node_id:port_id> are <0:0>, then the lookup is restricted |
| 1732 | * to <service:instance>. Used only when a client wants to send a |
| 1733 | * message to any QMI server. |
| 1734 | */ |
| 1735 | static struct msm_ipc_server *msm_ipc_router_lookup_server( |
| 1736 | u32 service, |
| 1737 | u32 instance, |
| 1738 | u32 node_id, |
| 1739 | u32 port_id) |
| 1740 | { |
| 1741 | struct msm_ipc_server *server; |
| 1742 | struct msm_ipc_server_port *server_port; |
| 1743 | int key = (service & (SRV_HASH_SIZE - 1)); |
| 1744 | |
| 1745 | list_for_each_entry(server, &server_list[key], list) { |
| 1746 | if ((server->name.service != service) || |
| 1747 | (server->name.instance != instance)) |
| 1748 | continue; |
| 1749 | if ((node_id == 0) && (port_id == 0)) |
| 1750 | return server; |
| 1751 | list_for_each_entry(server_port, &server->server_port_list, |
| 1752 | list) { |
| 1753 | if ((server_port->server_addr.node_id == node_id) && |
| 1754 | (server_port->server_addr.port_id == port_id)) |
| 1755 | return server; |
| 1756 | } |
| 1757 | } |
| 1758 | return NULL; |
| 1759 | } |
| 1760 | |
| 1761 | /** |
| 1762 | * ipc_router_get_server_ref() - Get reference to the server |
| 1763 | * @svc: Service ID for which the reference is required. |
| 1764 | * @ins: Instance ID for which the reference is required. |
| 1765 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1766 | * @port_id: Port ID within the node in which the server is hosted. |
| 1767 | * |
| 1768 | * @return: If found return reference to server, else NULL. |
| 1769 | */ |
| 1770 | static struct msm_ipc_server *ipc_router_get_server_ref( |
| 1771 | u32 svc, u32 ins, u32 node_id, u32 port_id) |
| 1772 | { |
| 1773 | struct msm_ipc_server *server; |
| 1774 | |
| 1775 | down_read(&server_list_lock_lha2); |
| 1776 | server = msm_ipc_router_lookup_server(svc, ins, node_id, port_id); |
| 1777 | if (server) |
| 1778 | kref_get(&server->ref); |
| 1779 | up_read(&server_list_lock_lha2); |
| 1780 | return server; |
| 1781 | } |
| 1782 | |
| 1783 | /** |
| 1784 | * ipc_router_release_server() - Cleanup and release the server |
| 1785 | * @ref: Reference to the server. |
| 1786 | * |
| 1787 | * This function is called when all references to the server are released. |
| 1788 | */ |
| 1789 | static void ipc_router_release_server(struct kref *ref) |
| 1790 | { |
| 1791 | struct msm_ipc_server *server = |
| 1792 | container_of(ref, struct msm_ipc_server, ref); |
| 1793 | |
| 1794 | kfree(server); |
| 1795 | } |
| 1796 | |
| 1797 | /** |
| 1798 | * msm_ipc_router_create_server() - Add server info to hash table |
| 1799 | * @service: Service ID of the server info to be created. |
| 1800 | * @instance: Instance ID of the server info to be created. |
| 1801 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1802 | * @port_id: Port ID within the node in which the server is hosted. |
| 1803 | * @xprt_info: XPRT through which the node hosting the server is reached. |
| 1804 | * |
| 1805 | * @return: Pointer to server structure on success, else NULL. |
| 1806 | * |
| 1807 | * This function adds the server info to the hash table. If the same |
| 1808 | * server(i.e. <service_id:instance_id>) is hosted in different nodes, |
| 1809 | * they are maintained as list of "server_port" under "server" structure. |
| 1810 | */ |
| 1811 | static struct msm_ipc_server *msm_ipc_router_create_server( |
| 1812 | u32 service, |
| 1813 | u32 instance, |
| 1814 | u32 node_id, |
| 1815 | u32 port_id, |
| 1816 | struct msm_ipc_router_xprt_info *xprt_info) |
| 1817 | { |
| 1818 | struct msm_ipc_server *server = NULL; |
| 1819 | struct msm_ipc_server_port *server_port; |
| 1820 | struct platform_device *pdev; |
| 1821 | int key = (service & (SRV_HASH_SIZE - 1)); |
| 1822 | |
| 1823 | down_write(&server_list_lock_lha2); |
| 1824 | server = msm_ipc_router_lookup_server(service, instance, 0, 0); |
| 1825 | if (server) { |
| 1826 | list_for_each_entry(server_port, &server->server_port_list, |
| 1827 | list) { |
| 1828 | if ((server_port->server_addr.node_id == node_id) && |
| 1829 | (server_port->server_addr.port_id == port_id)) |
| 1830 | goto return_server; |
| 1831 | } |
| 1832 | goto create_srv_port; |
| 1833 | } |
| 1834 | |
| 1835 | server = kzalloc(sizeof(*server), GFP_KERNEL); |
| 1836 | if (!server) { |
| 1837 | up_write(&server_list_lock_lha2); |
| 1838 | IPC_RTR_ERR("%s: Server allocation failed\n", __func__); |
| 1839 | return NULL; |
| 1840 | } |
| 1841 | server->name.service = service; |
| 1842 | server->name.instance = instance; |
| 1843 | server->synced_sec_rule = 0; |
| 1844 | INIT_LIST_HEAD(&server->server_port_list); |
| 1845 | kref_init(&server->ref); |
| 1846 | list_add_tail(&server->list, &server_list[key]); |
| 1847 | scnprintf(server->pdev_name, sizeof(server->pdev_name), |
| 1848 | "SVC%08x:%08x", service, instance); |
| 1849 | server->next_pdev_id = 1; |
| 1850 | |
| 1851 | create_srv_port: |
| 1852 | server_port = kzalloc(sizeof(*server_port), GFP_KERNEL); |
| 1853 | pdev = platform_device_alloc(server->pdev_name, server->next_pdev_id); |
| 1854 | if (!server_port || !pdev) { |
| 1855 | kfree(server_port); |
| 1856 | if (pdev) |
| 1857 | platform_device_put(pdev); |
| 1858 | if (list_empty(&server->server_port_list)) { |
| 1859 | list_del(&server->list); |
| 1860 | kfree(server); |
| 1861 | } |
| 1862 | up_write(&server_list_lock_lha2); |
| 1863 | IPC_RTR_ERR("%s: Server Port allocation failed\n", __func__); |
| 1864 | return NULL; |
| 1865 | } |
| 1866 | server_port->pdev = pdev; |
| 1867 | server_port->server_addr.node_id = node_id; |
| 1868 | server_port->server_addr.port_id = port_id; |
| 1869 | server_port->xprt_info = xprt_info; |
| 1870 | list_add_tail(&server_port->list, &server->server_port_list); |
| 1871 | server->next_pdev_id++; |
| 1872 | platform_device_add(server_port->pdev); |
| 1873 | |
| 1874 | return_server: |
| 1875 | /* Add a reference so that the caller can put it back */ |
| 1876 | kref_get(&server->ref); |
| 1877 | up_write(&server_list_lock_lha2); |
| 1878 | return server; |
| 1879 | } |
| 1880 | |
| 1881 | /** |
| 1882 | * ipc_router_destroy_server_nolock() - Remove server info from hash table |
| 1883 | * @server: Server info to be removed. |
| 1884 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1885 | * @port_id: Port ID within the node in which the server is hosted. |
| 1886 | * |
| 1887 | * This function removes the server_port identified using <node_id:port_id> |
| 1888 | * from the server structure. If the server_port list under server structure |
| 1889 | * is empty after removal, then remove the server structure from the server |
| 1890 | * hash table. This function must be called with server_list_lock_lha2 locked. |
| 1891 | */ |
| 1892 | static void ipc_router_destroy_server_nolock(struct msm_ipc_server *server, |
| 1893 | u32 node_id, u32 port_id) |
| 1894 | { |
| 1895 | struct msm_ipc_server_port *server_port; |
| 1896 | bool server_port_found = false; |
| 1897 | |
| 1898 | if (!server) |
| 1899 | return; |
| 1900 | |
| 1901 | list_for_each_entry(server_port, &server->server_port_list, list) { |
| 1902 | if ((server_port->server_addr.node_id == node_id) && |
| 1903 | (server_port->server_addr.port_id == port_id)) { |
| 1904 | server_port_found = true; |
| 1905 | break; |
| 1906 | } |
| 1907 | } |
| 1908 | if (server_port_found && server_port) { |
| 1909 | platform_device_unregister(server_port->pdev); |
| 1910 | list_del(&server_port->list); |
| 1911 | kfree(server_port); |
| 1912 | } |
| 1913 | if (list_empty(&server->server_port_list)) { |
| 1914 | list_del(&server->list); |
| 1915 | kref_put(&server->ref, ipc_router_release_server); |
| 1916 | } |
| 1917 | } |
| 1918 | |
| 1919 | /** |
| 1920 | * ipc_router_destroy_server() - Remove server info from hash table |
| 1921 | * @server: Server info to be removed. |
| 1922 | * @node_id: Node/Processor ID in which the server is hosted. |
| 1923 | * @port_id: Port ID within the node in which the server is hosted. |
| 1924 | * |
| 1925 | * This function removes the server_port identified using <node_id:port_id> |
| 1926 | * from the server structure. If the server_port list under server structure |
| 1927 | * is empty after removal, then remove the server structure from the server |
| 1928 | * hash table. |
| 1929 | */ |
| 1930 | static void ipc_router_destroy_server(struct msm_ipc_server *server, |
| 1931 | u32 node_id, u32 port_id) |
| 1932 | { |
| 1933 | down_write(&server_list_lock_lha2); |
| 1934 | ipc_router_destroy_server_nolock(server, node_id, port_id); |
| 1935 | up_write(&server_list_lock_lha2); |
| 1936 | } |
| 1937 | |
| 1938 | static int ipc_router_send_ctl_msg( |
| 1939 | struct msm_ipc_router_xprt_info *xprt_info, |
| 1940 | union rr_control_msg *msg, |
| 1941 | u32 dst_node_id) |
| 1942 | { |
| 1943 | struct rr_packet *pkt; |
| 1944 | struct sk_buff *ipc_rtr_pkt; |
| 1945 | struct rr_header_v1 *hdr; |
| 1946 | int pkt_size; |
| 1947 | void *data; |
| 1948 | int ret = -EINVAL; |
| 1949 | |
| 1950 | pkt = create_pkt(NULL); |
| 1951 | if (!pkt) { |
| 1952 | IPC_RTR_ERR("%s: pkt alloc failed\n", __func__); |
| 1953 | return -ENOMEM; |
| 1954 | } |
| 1955 | |
| 1956 | pkt_size = IPC_ROUTER_HDR_SIZE + sizeof(*msg); |
| 1957 | ipc_rtr_pkt = alloc_skb(pkt_size, GFP_KERNEL); |
| 1958 | if (!ipc_rtr_pkt) { |
| 1959 | IPC_RTR_ERR("%s: ipc_rtr_pkt alloc failed\n", __func__); |
| 1960 | release_pkt(pkt); |
| 1961 | return -ENOMEM; |
| 1962 | } |
| 1963 | |
| 1964 | skb_reserve(ipc_rtr_pkt, IPC_ROUTER_HDR_SIZE); |
| 1965 | data = skb_put(ipc_rtr_pkt, sizeof(*msg)); |
| 1966 | memcpy(data, msg, sizeof(*msg)); |
| 1967 | skb_queue_tail(pkt->pkt_fragment_q, ipc_rtr_pkt); |
| 1968 | pkt->length = sizeof(*msg); |
| 1969 | |
| 1970 | hdr = &pkt->hdr; |
| 1971 | hdr->version = IPC_ROUTER_V1; |
| 1972 | hdr->type = msg->cmd; |
| 1973 | hdr->src_node_id = IPC_ROUTER_NID_LOCAL; |
| 1974 | hdr->src_port_id = IPC_ROUTER_ADDRESS; |
| 1975 | hdr->control_flag = 0; |
| 1976 | hdr->size = sizeof(*msg); |
| 1977 | if (hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX || |
| 1978 | (!xprt_info && dst_node_id == IPC_ROUTER_NID_LOCAL)) |
| 1979 | hdr->dst_node_id = dst_node_id; |
| 1980 | else if (xprt_info) |
| 1981 | hdr->dst_node_id = xprt_info->remote_node_id; |
| 1982 | hdr->dst_port_id = IPC_ROUTER_ADDRESS; |
| 1983 | |
| 1984 | if (dst_node_id == IPC_ROUTER_NID_LOCAL && |
| 1985 | msg->cmd != IPC_ROUTER_CTRL_CMD_RESUME_TX) { |
| 1986 | ipc_router_log_msg(local_log_ctx, IPC_ROUTER_LOG_EVENT_TX, msg, |
| 1987 | hdr, NULL, NULL); |
| 1988 | ret = post_control_ports(pkt); |
| 1989 | } else if (dst_node_id == IPC_ROUTER_NID_LOCAL && |
| 1990 | msg->cmd == IPC_ROUTER_CTRL_CMD_RESUME_TX) { |
| 1991 | ipc_router_log_msg(local_log_ctx, IPC_ROUTER_LOG_EVENT_TX, msg, |
| 1992 | hdr, NULL, NULL); |
| 1993 | ret = process_resume_tx_msg(msg, pkt); |
| 1994 | } else if (xprt_info && (msg->cmd == IPC_ROUTER_CTRL_CMD_HELLO || |
| 1995 | xprt_info->initialized)) { |
| 1996 | mutex_lock(&xprt_info->tx_lock_lhb2); |
| 1997 | ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_TX, |
| 1998 | msg, hdr, NULL, NULL); |
| 1999 | ret = prepend_header(pkt, xprt_info); |
| 2000 | if (ret < 0) { |
| 2001 | mutex_unlock(&xprt_info->tx_lock_lhb2); |
| 2002 | IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| 2003 | release_pkt(pkt); |
| 2004 | return ret; |
| 2005 | } |
| 2006 | |
| 2007 | ret = xprt_info->xprt->write(pkt, pkt->length, xprt_info->xprt); |
| 2008 | mutex_unlock(&xprt_info->tx_lock_lhb2); |
| 2009 | } |
| 2010 | |
| 2011 | release_pkt(pkt); |
| 2012 | return ret; |
| 2013 | } |
| 2014 | |
| 2015 | static int |
| 2016 | msm_ipc_router_send_server_list(u32 node_id, |
| 2017 | struct msm_ipc_router_xprt_info *xprt_info) |
| 2018 | { |
| 2019 | union rr_control_msg ctl; |
| 2020 | struct msm_ipc_server *server; |
| 2021 | struct msm_ipc_server_port *server_port; |
| 2022 | int i; |
| 2023 | |
| 2024 | if (!xprt_info || !xprt_info->initialized) { |
| 2025 | IPC_RTR_ERR("%s: Xprt info not initialized\n", __func__); |
| 2026 | return -EINVAL; |
| 2027 | } |
| 2028 | |
| 2029 | memset(&ctl, 0, sizeof(ctl)); |
| 2030 | ctl.cmd = IPC_ROUTER_CTRL_CMD_NEW_SERVER; |
| 2031 | |
| 2032 | for (i = 0; i < SRV_HASH_SIZE; i++) { |
| 2033 | list_for_each_entry(server, &server_list[i], list) { |
| 2034 | ctl.srv.service = server->name.service; |
| 2035 | ctl.srv.instance = server->name.instance; |
| 2036 | list_for_each_entry(server_port, |
| 2037 | &server->server_port_list, list) { |
| 2038 | if (server_port->server_addr.node_id != |
| 2039 | node_id) |
| 2040 | continue; |
| 2041 | |
| 2042 | ctl.srv.node_id = |
| 2043 | server_port->server_addr.node_id; |
| 2044 | ctl.srv.port_id = |
| 2045 | server_port->server_addr.port_id; |
| 2046 | ipc_router_send_ctl_msg |
| 2047 | (xprt_info, &ctl, |
| 2048 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2049 | } |
| 2050 | } |
| 2051 | } |
| 2052 | |
| 2053 | return 0; |
| 2054 | } |
| 2055 | |
| 2056 | static int broadcast_ctl_msg_locally(union rr_control_msg *msg) |
| 2057 | { |
| 2058 | return ipc_router_send_ctl_msg(NULL, msg, IPC_ROUTER_NID_LOCAL); |
| 2059 | } |
| 2060 | |
| 2061 | static int broadcast_ctl_msg(union rr_control_msg *ctl) |
| 2062 | { |
| 2063 | struct msm_ipc_router_xprt_info *xprt_info; |
| 2064 | |
| 2065 | down_read(&xprt_info_list_lock_lha5); |
| 2066 | list_for_each_entry(xprt_info, &xprt_info_list, list) { |
| 2067 | ipc_router_send_ctl_msg(xprt_info, ctl, |
| 2068 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2069 | } |
| 2070 | up_read(&xprt_info_list_lock_lha5); |
| 2071 | broadcast_ctl_msg_locally(ctl); |
| 2072 | |
| 2073 | return 0; |
| 2074 | } |
| 2075 | |
| 2076 | static int relay_ctl_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2077 | union rr_control_msg *ctl) |
| 2078 | { |
| 2079 | struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| 2080 | |
| 2081 | if (!xprt_info || !ctl) |
| 2082 | return -EINVAL; |
| 2083 | |
| 2084 | down_read(&xprt_info_list_lock_lha5); |
| 2085 | list_for_each_entry(fwd_xprt_info, &xprt_info_list, list) { |
| 2086 | if (xprt_info->xprt->link_id != fwd_xprt_info->xprt->link_id) |
| 2087 | ipc_router_send_ctl_msg(fwd_xprt_info, ctl, |
| 2088 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2089 | } |
| 2090 | up_read(&xprt_info_list_lock_lha5); |
| 2091 | |
| 2092 | return 0; |
| 2093 | } |
| 2094 | |
| 2095 | static int forward_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2096 | struct rr_packet *pkt) |
| 2097 | { |
| 2098 | struct rr_header_v1 *hdr; |
| 2099 | struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| 2100 | struct msm_ipc_routing_table_entry *rt_entry; |
| 2101 | int ret = 0; |
| 2102 | int fwd_xprt_option; |
| 2103 | |
| 2104 | if (!xprt_info || !pkt) |
| 2105 | return -EINVAL; |
| 2106 | |
| 2107 | hdr = &pkt->hdr; |
| 2108 | rt_entry = ipc_router_get_rtentry_ref(hdr->dst_node_id); |
| 2109 | if (!(rt_entry) || !(rt_entry->xprt_info)) { |
| 2110 | IPC_RTR_ERR("%s: Routing table not initialized\n", __func__); |
| 2111 | ret = -ENODEV; |
| 2112 | goto fm_error1; |
| 2113 | } |
| 2114 | |
| 2115 | down_read(&rt_entry->lock_lha4); |
| 2116 | fwd_xprt_info = rt_entry->xprt_info; |
| 2117 | ret = ipc_router_get_xprt_info_ref(fwd_xprt_info); |
| 2118 | if (ret < 0) { |
| 2119 | IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| 2120 | goto fm_error_xprt; |
| 2121 | } |
| 2122 | ret = prepend_header(pkt, fwd_xprt_info); |
| 2123 | if (ret < 0) { |
| 2124 | IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| 2125 | goto fm_error2; |
| 2126 | } |
| 2127 | fwd_xprt_option = fwd_xprt_info->xprt->get_option(fwd_xprt_info->xprt); |
| 2128 | if (!(fwd_xprt_option & FRAG_PKT_WRITE_ENABLE)) { |
| 2129 | ret = defragment_pkt(pkt); |
| 2130 | if (ret < 0) |
| 2131 | goto fm_error2; |
| 2132 | } |
| 2133 | |
| 2134 | mutex_lock(&fwd_xprt_info->tx_lock_lhb2); |
| 2135 | if (xprt_info->remote_node_id == fwd_xprt_info->remote_node_id) { |
| 2136 | IPC_RTR_ERR("%s: Discarding Command to route back\n", __func__); |
| 2137 | ret = -EINVAL; |
| 2138 | goto fm_error3; |
| 2139 | } |
| 2140 | |
| 2141 | if (xprt_info->xprt->link_id == fwd_xprt_info->xprt->link_id) { |
| 2142 | IPC_RTR_ERR("%s: DST in the same cluster\n", __func__); |
| 2143 | ret = 0; |
| 2144 | goto fm_error3; |
| 2145 | } |
| 2146 | fwd_xprt_info->xprt->write(pkt, pkt->length, fwd_xprt_info->xprt); |
| 2147 | IPC_RTR_INFO(fwd_xprt_info->log_ctx, |
| 2148 | "%s %s Len:0x%x T:0x%x CF:0x%x SRC:<0x%x:0x%x> DST:<0x%x:0x%x>\n", |
| 2149 | "FWD", "TX", hdr->size, hdr->type, hdr->control_flag, |
| 2150 | hdr->src_node_id, hdr->src_port_id, |
| 2151 | hdr->dst_node_id, hdr->dst_port_id); |
| 2152 | |
| 2153 | fm_error3: |
| 2154 | mutex_unlock(&fwd_xprt_info->tx_lock_lhb2); |
| 2155 | fm_error2: |
| 2156 | ipc_router_put_xprt_info_ref(fwd_xprt_info); |
| 2157 | fm_error_xprt: |
| 2158 | up_read(&rt_entry->lock_lha4); |
| 2159 | fm_error1: |
| 2160 | if (rt_entry) |
| 2161 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2162 | return ret; |
| 2163 | } |
| 2164 | |
| 2165 | static int msm_ipc_router_send_remove_client(struct comm_mode_info *mode_info, |
| 2166 | u32 node_id, u32 port_id) |
| 2167 | { |
| 2168 | union rr_control_msg msg; |
| 2169 | struct msm_ipc_router_xprt_info *tmp_xprt_info; |
| 2170 | int mode; |
| 2171 | void *xprt_info; |
| 2172 | int rc = 0; |
| 2173 | |
| 2174 | if (!mode_info) { |
| 2175 | IPC_RTR_ERR("%s: NULL mode_info\n", __func__); |
| 2176 | return -EINVAL; |
| 2177 | } |
| 2178 | mode = mode_info->mode; |
| 2179 | xprt_info = mode_info->xprt_info; |
| 2180 | |
| 2181 | memset(&msg, 0, sizeof(msg)); |
| 2182 | msg.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| 2183 | msg.cli.node_id = node_id; |
| 2184 | msg.cli.port_id = port_id; |
| 2185 | |
| 2186 | if ((mode == SINGLE_LINK_MODE) && xprt_info) { |
| 2187 | down_read(&xprt_info_list_lock_lha5); |
| 2188 | list_for_each_entry(tmp_xprt_info, &xprt_info_list, list) { |
| 2189 | if (tmp_xprt_info != xprt_info) |
| 2190 | continue; |
| 2191 | ipc_router_send_ctl_msg(tmp_xprt_info, &msg, |
| 2192 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2193 | break; |
| 2194 | } |
| 2195 | up_read(&xprt_info_list_lock_lha5); |
| 2196 | } else if ((mode == SINGLE_LINK_MODE) && !xprt_info) { |
| 2197 | broadcast_ctl_msg_locally(&msg); |
| 2198 | } else if (mode == MULTI_LINK_MODE) { |
| 2199 | broadcast_ctl_msg(&msg); |
| 2200 | } else if (mode != NULL_MODE) { |
| 2201 | IPC_RTR_ERR( |
| 2202 | "%s: Invalid mode(%d) + xprt_inf(%p) for %08x:%08x\n", |
| 2203 | __func__, mode, xprt_info, node_id, port_id); |
| 2204 | rc = -EINVAL; |
| 2205 | } |
| 2206 | return rc; |
| 2207 | } |
| 2208 | |
| 2209 | static void update_comm_mode_info(struct comm_mode_info *mode_info, |
| 2210 | struct msm_ipc_router_xprt_info *xprt_info) |
| 2211 | { |
| 2212 | if (!mode_info) { |
| 2213 | IPC_RTR_ERR("%s: NULL mode_info\n", __func__); |
| 2214 | return; |
| 2215 | } |
| 2216 | |
| 2217 | if (mode_info->mode == NULL_MODE) { |
| 2218 | mode_info->xprt_info = xprt_info; |
| 2219 | mode_info->mode = SINGLE_LINK_MODE; |
| 2220 | } else if (mode_info->mode == SINGLE_LINK_MODE && |
| 2221 | mode_info->xprt_info != xprt_info) { |
| 2222 | mode_info->mode = MULTI_LINK_MODE; |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | /** |
| 2227 | * cleanup_rmt_server() - Cleanup server hosted in the remote port |
| 2228 | * @xprt_info: XPRT through which this cleanup event is handled. |
| 2229 | * @rport_ptr: Remote port that is being cleaned up. |
| 2230 | * @server: Server that is hosted in the remote port. |
| 2231 | */ |
| 2232 | static void cleanup_rmt_server(struct msm_ipc_router_xprt_info *xprt_info, |
| 2233 | struct msm_ipc_router_remote_port *rport_ptr, |
| 2234 | struct msm_ipc_server *server) |
| 2235 | { |
| 2236 | union rr_control_msg ctl; |
| 2237 | |
| 2238 | memset(&ctl, 0, sizeof(ctl)); |
| 2239 | ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| 2240 | ctl.srv.service = server->name.service; |
| 2241 | ctl.srv.instance = server->name.instance; |
| 2242 | ctl.srv.node_id = rport_ptr->node_id; |
| 2243 | ctl.srv.port_id = rport_ptr->port_id; |
| 2244 | if (xprt_info) |
| 2245 | relay_ctl_msg(xprt_info, &ctl); |
| 2246 | broadcast_ctl_msg_locally(&ctl); |
| 2247 | ipc_router_destroy_server_nolock(server, rport_ptr->node_id, |
| 2248 | rport_ptr->port_id); |
| 2249 | } |
| 2250 | |
| 2251 | static void cleanup_rmt_ports(struct msm_ipc_router_xprt_info *xprt_info, |
| 2252 | struct msm_ipc_routing_table_entry *rt_entry) |
| 2253 | { |
| 2254 | struct msm_ipc_router_remote_port *rport_ptr, *tmp_rport_ptr; |
| 2255 | struct msm_ipc_server *server; |
| 2256 | union rr_control_msg ctl; |
| 2257 | int j; |
| 2258 | |
| 2259 | memset(&ctl, 0, sizeof(ctl)); |
| 2260 | for (j = 0; j < RP_HASH_SIZE; j++) { |
| 2261 | list_for_each_entry_safe(rport_ptr, tmp_rport_ptr, |
| 2262 | &rt_entry->remote_port_list[j], list) { |
| 2263 | list_del(&rport_ptr->list); |
| 2264 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2265 | server = rport_ptr->server; |
| 2266 | rport_ptr->server = NULL; |
| 2267 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2268 | ipc_router_reset_conn(rport_ptr); |
| 2269 | if (server) { |
| 2270 | cleanup_rmt_server(xprt_info, rport_ptr, |
| 2271 | server); |
| 2272 | server = NULL; |
| 2273 | } |
| 2274 | |
| 2275 | ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| 2276 | ctl.cli.node_id = rport_ptr->node_id; |
| 2277 | ctl.cli.port_id = rport_ptr->port_id; |
| 2278 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2279 | |
| 2280 | relay_ctl_msg(xprt_info, &ctl); |
| 2281 | broadcast_ctl_msg_locally(&ctl); |
| 2282 | } |
| 2283 | } |
| 2284 | } |
| 2285 | |
| 2286 | static void msm_ipc_cleanup_routing_table( |
| 2287 | struct msm_ipc_router_xprt_info *xprt_info) |
| 2288 | { |
| 2289 | int i; |
| 2290 | struct msm_ipc_routing_table_entry *rt_entry, *tmp_rt_entry; |
| 2291 | |
| 2292 | if (!xprt_info) { |
| 2293 | IPC_RTR_ERR("%s: Invalid xprt_info\n", __func__); |
| 2294 | return; |
| 2295 | } |
| 2296 | |
| 2297 | down_write(&server_list_lock_lha2); |
| 2298 | down_write(&routing_table_lock_lha3); |
| 2299 | for (i = 0; i < RT_HASH_SIZE; i++) { |
| 2300 | list_for_each_entry_safe(rt_entry, tmp_rt_entry, |
| 2301 | &routing_table[i], list) { |
| 2302 | down_write(&rt_entry->lock_lha4); |
| 2303 | if (rt_entry->xprt_info != xprt_info) { |
| 2304 | up_write(&rt_entry->lock_lha4); |
| 2305 | continue; |
| 2306 | } |
| 2307 | cleanup_rmt_ports(xprt_info, rt_entry); |
| 2308 | rt_entry->xprt_info = NULL; |
| 2309 | up_write(&rt_entry->lock_lha4); |
| 2310 | list_del(&rt_entry->list); |
| 2311 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2312 | } |
| 2313 | } |
| 2314 | up_write(&routing_table_lock_lha3); |
| 2315 | up_write(&server_list_lock_lha2); |
| 2316 | } |
| 2317 | |
| 2318 | /** |
| 2319 | * sync_sec_rule() - Synchrnoize the security rule into the server structure |
| 2320 | * @server: Server structure where the rule has to be synchronized. |
| 2321 | * @rule: Security tule to be synchronized. |
| 2322 | * |
| 2323 | * This function is used to update the server structure with the security |
| 2324 | * rule configured for the <service:instance> corresponding to that server. |
| 2325 | */ |
| 2326 | static void sync_sec_rule(struct msm_ipc_server *server, void *rule) |
| 2327 | { |
| 2328 | struct msm_ipc_server_port *server_port; |
| 2329 | struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| 2330 | |
| 2331 | list_for_each_entry(server_port, &server->server_port_list, list) { |
| 2332 | rport_ptr = ipc_router_get_rport_ref( |
| 2333 | server_port->server_addr.node_id, |
| 2334 | server_port->server_addr.port_id); |
| 2335 | if (!rport_ptr) |
| 2336 | continue; |
| 2337 | rport_ptr->sec_rule = rule; |
| 2338 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2339 | } |
| 2340 | server->synced_sec_rule = 1; |
| 2341 | } |
| 2342 | |
| 2343 | /** |
| 2344 | * msm_ipc_sync_sec_rule() - Sync the security rule to the service |
| 2345 | * @service: Service for which the rule has to be synchronized. |
| 2346 | * @instance: Instance for which the rule has to be synchronized. |
| 2347 | * @rule: Security rule to be synchronized. |
| 2348 | * |
| 2349 | * This function is used to syncrhonize the security rule with the server |
| 2350 | * hash table, if the user-space script configures the rule after the service |
| 2351 | * has come up. This function is used to synchronize the security rule to a |
| 2352 | * specific service and optionally a specific instance. |
| 2353 | */ |
| 2354 | void msm_ipc_sync_sec_rule(u32 service, u32 instance, void *rule) |
| 2355 | { |
| 2356 | int key = (service & (SRV_HASH_SIZE - 1)); |
| 2357 | struct msm_ipc_server *server; |
| 2358 | |
| 2359 | down_write(&server_list_lock_lha2); |
| 2360 | list_for_each_entry(server, &server_list[key], list) { |
| 2361 | if (server->name.service != service) |
| 2362 | continue; |
| 2363 | |
| 2364 | if (server->name.instance != instance && |
| 2365 | instance != ALL_INSTANCE) |
| 2366 | continue; |
| 2367 | |
| 2368 | /* If the rule applies to all instances and if the specific |
| 2369 | * instance of a service has a rule synchronized already, |
| 2370 | * do not apply the rule for that specific instance. |
| 2371 | */ |
| 2372 | if (instance == ALL_INSTANCE && server->synced_sec_rule) |
| 2373 | continue; |
| 2374 | |
| 2375 | sync_sec_rule(server, rule); |
| 2376 | } |
| 2377 | up_write(&server_list_lock_lha2); |
| 2378 | } |
| 2379 | |
| 2380 | /** |
| 2381 | * msm_ipc_sync_default_sec_rule() - Default security rule to all services |
| 2382 | * @rule: Security rule to be synchronized. |
| 2383 | * |
| 2384 | * This function is used to syncrhonize the security rule with the server |
| 2385 | * hash table, if the user-space script configures the rule after the service |
| 2386 | * has come up. This function is used to synchronize the security rule that |
| 2387 | * applies to all services, if the concerned service do not have any rule |
| 2388 | * defined. |
| 2389 | */ |
| 2390 | void msm_ipc_sync_default_sec_rule(void *rule) |
| 2391 | { |
| 2392 | int key; |
| 2393 | struct msm_ipc_server *server; |
| 2394 | |
| 2395 | down_write(&server_list_lock_lha2); |
| 2396 | for (key = 0; key < SRV_HASH_SIZE; key++) { |
| 2397 | list_for_each_entry(server, &server_list[key], list) { |
| 2398 | if (server->synced_sec_rule) |
| 2399 | continue; |
| 2400 | |
| 2401 | sync_sec_rule(server, rule); |
| 2402 | } |
| 2403 | } |
| 2404 | up_write(&server_list_lock_lha2); |
| 2405 | } |
| 2406 | |
| 2407 | /** |
| 2408 | * ipc_router_reset_conn() - Reset the connection to remote port |
| 2409 | * @rport_ptr: Pointer to the remote port to be disconnected. |
| 2410 | * |
| 2411 | * This function is used to reset all the local ports that are connected to |
| 2412 | * the remote port being passed. |
| 2413 | */ |
| 2414 | static void ipc_router_reset_conn(struct msm_ipc_router_remote_port *rport_ptr) |
| 2415 | { |
| 2416 | struct msm_ipc_port *port_ptr; |
| 2417 | struct ipc_router_conn_info *conn_info, *tmp_conn_info; |
| 2418 | |
| 2419 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2420 | list_for_each_entry_safe(conn_info, tmp_conn_info, |
| 2421 | &rport_ptr->conn_info_list, list) { |
| 2422 | port_ptr = ipc_router_get_port_ref(conn_info->port_id); |
| 2423 | if (port_ptr) { |
| 2424 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2425 | port_ptr->conn_status = CONNECTION_RESET; |
| 2426 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2427 | wake_up(&port_ptr->port_rx_wait_q); |
| 2428 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2429 | } |
| 2430 | |
| 2431 | list_del(&conn_info->list); |
| 2432 | kfree(conn_info); |
| 2433 | } |
| 2434 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2435 | } |
| 2436 | |
| 2437 | /** |
| 2438 | * ipc_router_set_conn() - Set the connection by initializing dest address |
| 2439 | * @port_ptr: Local port in which the connection has to be set. |
| 2440 | * @addr: Destination address of the connection. |
| 2441 | * |
| 2442 | * @return: 0 on success, standard Linux error codes on failure. |
| 2443 | */ |
| 2444 | int ipc_router_set_conn(struct msm_ipc_port *port_ptr, |
| 2445 | struct msm_ipc_addr *addr) |
| 2446 | { |
| 2447 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2448 | struct ipc_router_conn_info *conn_info; |
| 2449 | |
| 2450 | if (unlikely(!port_ptr || !addr)) |
| 2451 | return -EINVAL; |
| 2452 | |
| 2453 | if (addr->addrtype != MSM_IPC_ADDR_ID) { |
| 2454 | IPC_RTR_ERR("%s: Invalid Address type\n", __func__); |
| 2455 | return -EINVAL; |
| 2456 | } |
| 2457 | |
| 2458 | if (port_ptr->type == SERVER_PORT) { |
| 2459 | IPC_RTR_ERR("%s: Connection refused on a server port\n", |
| 2460 | __func__); |
| 2461 | return -ECONNREFUSED; |
| 2462 | } |
| 2463 | |
| 2464 | if (port_ptr->conn_status == CONNECTED) { |
| 2465 | IPC_RTR_ERR("%s: Port %08x already connected\n", |
| 2466 | __func__, port_ptr->this_port.port_id); |
| 2467 | return -EISCONN; |
| 2468 | } |
| 2469 | |
| 2470 | conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); |
| 2471 | if (!conn_info) { |
| 2472 | IPC_RTR_ERR("%s: Error allocating conn_info\n", __func__); |
| 2473 | return -ENOMEM; |
| 2474 | } |
| 2475 | INIT_LIST_HEAD(&conn_info->list); |
| 2476 | conn_info->port_id = port_ptr->this_port.port_id; |
| 2477 | |
| 2478 | rport_ptr = ipc_router_get_rport_ref(addr->addr.port_addr.node_id, |
| 2479 | addr->addr.port_addr.port_id); |
| 2480 | if (!rport_ptr) { |
| 2481 | IPC_RTR_ERR("%s: Invalid remote endpoint\n", __func__); |
| 2482 | kfree(conn_info); |
| 2483 | return -ENODEV; |
| 2484 | } |
| 2485 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2486 | list_add_tail(&conn_info->list, &rport_ptr->conn_info_list); |
| 2487 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2488 | |
| 2489 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2490 | memcpy(&port_ptr->dest_addr, &addr->addr.port_addr, |
| 2491 | sizeof(struct msm_ipc_port_addr)); |
| 2492 | port_ptr->conn_status = CONNECTED; |
| 2493 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2494 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2495 | return 0; |
| 2496 | } |
| 2497 | |
| 2498 | /** |
| 2499 | * do_version_negotiation() - perform a version negotiation and set the version |
| 2500 | * @xprt_info: Pointer to the IPC Router transport info structure. |
| 2501 | * @msg: Pointer to the IPC Router HELLO message. |
| 2502 | * |
| 2503 | * This function performs the version negotiation by verifying the computed |
| 2504 | * checksum first. If the checksum matches with the magic number, it sets the |
| 2505 | * negotiated IPC Router version in transport. |
| 2506 | */ |
| 2507 | static void do_version_negotiation(struct msm_ipc_router_xprt_info *xprt_info, |
| 2508 | union rr_control_msg *msg) |
| 2509 | { |
| 2510 | u32 magic; |
| 2511 | unsigned int version; |
| 2512 | |
| 2513 | if (!xprt_info) |
| 2514 | return; |
| 2515 | magic = ipc_router_calc_checksum(msg); |
| 2516 | if (magic == IPC_ROUTER_HELLO_MAGIC) { |
| 2517 | version = fls(msg->hello.versions & IPC_ROUTER_VER_BITMASK) - 1; |
| 2518 | /*Bit 0 & 31 are reserved for future usage*/ |
| 2519 | if ((version > 0) && |
| 2520 | (version != (sizeof(version) * BITS_PER_BYTE - 1)) && |
| 2521 | xprt_info->xprt->set_version) |
| 2522 | xprt_info->xprt->set_version(xprt_info->xprt, version); |
| 2523 | } |
| 2524 | } |
| 2525 | |
Arun Kumar Neelakantam | f99191d | 2018-06-11 18:13:43 +0530 | [diff] [blame] | 2526 | static int send_hello_msg(struct msm_ipc_router_xprt_info *xprt_info) |
| 2527 | { |
| 2528 | int rc = 0; |
| 2529 | union rr_control_msg ctl; |
| 2530 | |
| 2531 | if (!xprt_info->hello_sent) { |
| 2532 | xprt_info->hello_sent = 1; |
| 2533 | /* Send a HELLO message */ |
| 2534 | memset(&ctl, 0, sizeof(ctl)); |
| 2535 | ctl.hello.cmd = IPC_ROUTER_CTRL_CMD_HELLO; |
| 2536 | ctl.hello.checksum = IPC_ROUTER_HELLO_MAGIC; |
| 2537 | ctl.hello.versions = (uint32_t)IPC_ROUTER_VER_BITMASK; |
| 2538 | ctl.hello.checksum = ipc_router_calc_checksum(&ctl); |
| 2539 | rc = ipc_router_send_ctl_msg(xprt_info, &ctl, |
| 2540 | IPC_ROUTER_DUMMY_DEST_NODE); |
| 2541 | if (rc < 0) { |
| 2542 | xprt_info->hello_sent = 0; |
| 2543 | IPC_RTR_ERR("%s: Error sending HELLO message\n", |
| 2544 | __func__); |
| 2545 | return rc; |
| 2546 | } |
| 2547 | } |
| 2548 | return rc; |
| 2549 | } |
| 2550 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2551 | static int process_hello_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2552 | union rr_control_msg *msg, |
| 2553 | struct rr_header_v1 *hdr) |
| 2554 | { |
| 2555 | int i, rc = 0; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2556 | struct msm_ipc_routing_table_entry *rt_entry; |
| 2557 | |
| 2558 | if (!hdr) |
| 2559 | return -EINVAL; |
| 2560 | |
| 2561 | xprt_info->remote_node_id = hdr->src_node_id; |
| 2562 | rt_entry = create_routing_table_entry(hdr->src_node_id, xprt_info); |
| 2563 | if (!rt_entry) { |
| 2564 | IPC_RTR_ERR("%s: rt_entry allocation failed\n", __func__); |
| 2565 | return -ENOMEM; |
| 2566 | } |
| 2567 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2568 | |
| 2569 | do_version_negotiation(xprt_info, msg); |
Arun Kumar Neelakantam | f99191d | 2018-06-11 18:13:43 +0530 | [diff] [blame] | 2570 | rc = send_hello_msg(xprt_info); |
| 2571 | if (rc < 0) |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2572 | return rc; |
Arun Kumar Neelakantam | f99191d | 2018-06-11 18:13:43 +0530 | [diff] [blame] | 2573 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2574 | xprt_info->initialized = 1; |
| 2575 | |
| 2576 | /* Send list of servers from the local node and from nodes |
| 2577 | * outside the mesh network in which this XPRT is part of. |
| 2578 | */ |
| 2579 | down_read(&server_list_lock_lha2); |
| 2580 | down_read(&routing_table_lock_lha3); |
| 2581 | for (i = 0; i < RT_HASH_SIZE; i++) { |
| 2582 | list_for_each_entry(rt_entry, &routing_table[i], list) { |
| 2583 | if ((rt_entry->node_id != IPC_ROUTER_NID_LOCAL) && |
| 2584 | (!rt_entry->xprt_info || |
| 2585 | (rt_entry->xprt_info->xprt->link_id == |
| 2586 | xprt_info->xprt->link_id))) |
| 2587 | continue; |
| 2588 | rc = msm_ipc_router_send_server_list(rt_entry->node_id, |
| 2589 | xprt_info); |
| 2590 | if (rc < 0) { |
| 2591 | up_read(&routing_table_lock_lha3); |
| 2592 | up_read(&server_list_lock_lha2); |
| 2593 | return rc; |
| 2594 | } |
| 2595 | } |
| 2596 | } |
| 2597 | up_read(&routing_table_lock_lha3); |
| 2598 | up_read(&server_list_lock_lha2); |
| 2599 | return rc; |
| 2600 | } |
| 2601 | |
| 2602 | static int process_resume_tx_msg(union rr_control_msg *msg, |
| 2603 | struct rr_packet *pkt) |
| 2604 | { |
| 2605 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2606 | |
| 2607 | rport_ptr = ipc_router_get_rport_ref(msg->cli.node_id, |
| 2608 | msg->cli.port_id); |
| 2609 | if (!rport_ptr) { |
| 2610 | IPC_RTR_ERR("%s: Unable to resume client\n", __func__); |
| 2611 | return -ENODEV; |
| 2612 | } |
| 2613 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2614 | rport_ptr->tx_quota_cnt = 0; |
| 2615 | post_resume_tx(rport_ptr, pkt, msg); |
| 2616 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2617 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2618 | return 0; |
| 2619 | } |
| 2620 | |
| 2621 | static int process_new_server_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2622 | union rr_control_msg *msg, |
| 2623 | struct rr_packet *pkt) |
| 2624 | { |
| 2625 | struct msm_ipc_routing_table_entry *rt_entry; |
| 2626 | struct msm_ipc_server *server; |
| 2627 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2628 | |
| 2629 | if (msg->srv.instance == 0) { |
| 2630 | IPC_RTR_ERR("%s: Server %08x create rejected, version = 0\n", |
| 2631 | __func__, msg->srv.service); |
| 2632 | return -EINVAL; |
| 2633 | } |
| 2634 | |
| 2635 | rt_entry = ipc_router_get_rtentry_ref(msg->srv.node_id); |
| 2636 | if (!rt_entry) { |
| 2637 | rt_entry = create_routing_table_entry(msg->srv.node_id, |
| 2638 | xprt_info); |
| 2639 | if (!rt_entry) { |
| 2640 | IPC_RTR_ERR("%s: rt_entry allocation failed\n", |
| 2641 | __func__); |
| 2642 | return -ENOMEM; |
| 2643 | } |
| 2644 | } |
| 2645 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 2646 | |
| 2647 | /* If the service already exists in the table, create_server returns |
| 2648 | * a reference to it. |
| 2649 | */ |
| 2650 | rport_ptr = ipc_router_create_rport(msg->srv.node_id, |
| 2651 | msg->srv.port_id, xprt_info); |
| 2652 | if (!rport_ptr) |
| 2653 | return -ENOMEM; |
| 2654 | |
| 2655 | server = msm_ipc_router_create_server( |
| 2656 | msg->srv.service, msg->srv.instance, |
| 2657 | msg->srv.node_id, msg->srv.port_id, xprt_info); |
| 2658 | if (!server) { |
| 2659 | IPC_RTR_ERR("%s: Server %08x:%08x Create failed\n", |
| 2660 | __func__, msg->srv.service, msg->srv.instance); |
| 2661 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2662 | ipc_router_destroy_rport(rport_ptr); |
| 2663 | return -ENOMEM; |
| 2664 | } |
| 2665 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2666 | rport_ptr->server = server; |
| 2667 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2668 | rport_ptr->sec_rule = msm_ipc_get_security_rule( |
| 2669 | msg->srv.service, msg->srv.instance); |
| 2670 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2671 | kref_put(&server->ref, ipc_router_release_server); |
| 2672 | |
| 2673 | /* Relay the new server message to other subsystems that do not belong |
| 2674 | * to the cluster from which this message is received. Notify the |
| 2675 | * local clients waiting for this service. |
| 2676 | */ |
| 2677 | relay_ctl_msg(xprt_info, msg); |
| 2678 | post_control_ports(pkt); |
| 2679 | return 0; |
| 2680 | } |
| 2681 | |
| 2682 | static int process_rmv_server_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2683 | union rr_control_msg *msg, |
| 2684 | struct rr_packet *pkt) |
| 2685 | { |
| 2686 | struct msm_ipc_server *server; |
| 2687 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2688 | |
| 2689 | server = ipc_router_get_server_ref(msg->srv.service, msg->srv.instance, |
| 2690 | msg->srv.node_id, msg->srv.port_id); |
| 2691 | rport_ptr = ipc_router_get_rport_ref(msg->srv.node_id, |
| 2692 | msg->srv.port_id); |
| 2693 | if (rport_ptr) { |
| 2694 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2695 | if (rport_ptr->server == server) |
| 2696 | rport_ptr->server = NULL; |
| 2697 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2698 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2699 | } |
| 2700 | |
| 2701 | if (server) { |
| 2702 | kref_put(&server->ref, ipc_router_release_server); |
| 2703 | ipc_router_destroy_server(server, msg->srv.node_id, |
| 2704 | msg->srv.port_id); |
| 2705 | /* Relay the new server message to other subsystems that do not |
| 2706 | * belong to the cluster from which this message is received. |
| 2707 | * Notify the local clients communicating with the service. |
| 2708 | */ |
| 2709 | relay_ctl_msg(xprt_info, msg); |
| 2710 | post_control_ports(pkt); |
| 2711 | } |
| 2712 | return 0; |
| 2713 | } |
| 2714 | |
| 2715 | static int process_rmv_client_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2716 | union rr_control_msg *msg, |
| 2717 | struct rr_packet *pkt) |
| 2718 | { |
| 2719 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2720 | struct msm_ipc_server *server; |
| 2721 | |
| 2722 | rport_ptr = ipc_router_get_rport_ref(msg->cli.node_id, |
| 2723 | msg->cli.port_id); |
| 2724 | if (rport_ptr) { |
| 2725 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 2726 | server = rport_ptr->server; |
| 2727 | rport_ptr->server = NULL; |
| 2728 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 2729 | ipc_router_reset_conn(rport_ptr); |
| 2730 | down_write(&server_list_lock_lha2); |
| 2731 | if (server) |
| 2732 | cleanup_rmt_server(NULL, rport_ptr, server); |
| 2733 | up_write(&server_list_lock_lha2); |
| 2734 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2735 | ipc_router_destroy_rport(rport_ptr); |
| 2736 | } |
| 2737 | |
| 2738 | relay_ctl_msg(xprt_info, msg); |
| 2739 | post_control_ports(pkt); |
| 2740 | return 0; |
| 2741 | } |
| 2742 | |
| 2743 | static int process_control_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| 2744 | struct rr_packet *pkt) |
| 2745 | { |
| 2746 | union rr_control_msg *msg; |
| 2747 | int rc = 0; |
| 2748 | struct rr_header_v1 *hdr; |
| 2749 | |
| 2750 | if (pkt->length != sizeof(*msg)) { |
| 2751 | IPC_RTR_ERR("%s: r2r msg size %d != %zu\n", __func__, |
| 2752 | pkt->length, sizeof(*msg)); |
| 2753 | return -EINVAL; |
| 2754 | } |
| 2755 | |
| 2756 | hdr = &pkt->hdr; |
| 2757 | msg = msm_ipc_router_skb_to_buf(pkt->pkt_fragment_q, sizeof(*msg)); |
| 2758 | if (!msg) { |
| 2759 | IPC_RTR_ERR("%s: Error extracting control msg\n", __func__); |
| 2760 | return -ENOMEM; |
| 2761 | } |
| 2762 | |
| 2763 | ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_RX, msg, |
| 2764 | hdr, NULL, NULL); |
| 2765 | |
| 2766 | switch (msg->cmd) { |
| 2767 | case IPC_ROUTER_CTRL_CMD_HELLO: |
| 2768 | rc = process_hello_msg(xprt_info, msg, hdr); |
| 2769 | break; |
| 2770 | case IPC_ROUTER_CTRL_CMD_RESUME_TX: |
| 2771 | rc = process_resume_tx_msg(msg, pkt); |
| 2772 | break; |
| 2773 | case IPC_ROUTER_CTRL_CMD_NEW_SERVER: |
| 2774 | rc = process_new_server_msg(xprt_info, msg, pkt); |
| 2775 | break; |
| 2776 | case IPC_ROUTER_CTRL_CMD_REMOVE_SERVER: |
| 2777 | rc = process_rmv_server_msg(xprt_info, msg, pkt); |
| 2778 | break; |
| 2779 | case IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT: |
| 2780 | rc = process_rmv_client_msg(xprt_info, msg, pkt); |
| 2781 | break; |
| 2782 | default: |
| 2783 | rc = -EINVAL; |
| 2784 | } |
| 2785 | kfree(msg); |
| 2786 | return rc; |
| 2787 | } |
| 2788 | |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 2789 | static void do_read_data(struct kthread_work *work) |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2790 | { |
| 2791 | struct rr_header_v1 *hdr; |
| 2792 | struct rr_packet *pkt = NULL; |
| 2793 | struct msm_ipc_port *port_ptr; |
| 2794 | struct msm_ipc_router_remote_port *rport_ptr; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2795 | |
| 2796 | struct msm_ipc_router_xprt_info *xprt_info = |
| 2797 | container_of(work, |
| 2798 | struct msm_ipc_router_xprt_info, |
| 2799 | read_data); |
| 2800 | |
| 2801 | while ((pkt = rr_read(xprt_info)) != NULL) { |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2802 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2803 | hdr = &pkt->hdr; |
| 2804 | |
| 2805 | if ((hdr->dst_node_id != IPC_ROUTER_NID_LOCAL) && |
| 2806 | ((hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX) || |
| 2807 | (hdr->type == IPC_ROUTER_CTRL_CMD_DATA))) { |
| 2808 | IPC_RTR_INFO(xprt_info->log_ctx, |
| 2809 | "%s %s Len:0x%x T:0x%x CF:0x%x SRC:<0x%x:0x%x> DST:<0x%x:0x%x>\n", |
| 2810 | "FWD", "RX", hdr->size, hdr->type, |
| 2811 | hdr->control_flag, hdr->src_node_id, |
| 2812 | hdr->src_port_id, hdr->dst_node_id, |
| 2813 | hdr->dst_port_id); |
Arun Prakash | 8c8dd7a | 2020-03-30 22:22:13 +0530 | [diff] [blame] | 2814 | /** |
| 2815 | * update forwarding port information as well in routing |
| 2816 | * table which will help to cleanup clients/services |
| 2817 | * running in modem when MSM goes down |
| 2818 | */ |
| 2819 | rport_ptr = ipc_router_get_rport_ref(hdr->src_node_id, |
| 2820 | hdr->src_port_id); |
| 2821 | if (!rport_ptr) { |
| 2822 | rport_ptr = |
| 2823 | ipc_router_create_rport(hdr->src_node_id, |
| 2824 | hdr->src_port_id, |
| 2825 | xprt_info); |
| 2826 | if (!rport_ptr) { |
| 2827 | IPC_RTR_ERR( |
| 2828 | "%s: Rmt Prt %08x:%08x create failed\n", |
| 2829 | __func__, hdr->src_node_id, |
| 2830 | hdr->src_port_id); |
| 2831 | } |
| 2832 | } |
| 2833 | /** |
| 2834 | * just to fail safe check is added, if rport |
| 2835 | * allocation failed above we still forward the |
| 2836 | * packet to remote. |
| 2837 | */ |
| 2838 | if (rport_ptr) |
| 2839 | kref_put(&rport_ptr->ref, |
| 2840 | ipc_router_release_rport); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2841 | forward_msg(xprt_info, pkt); |
| 2842 | goto read_next_pkt1; |
| 2843 | } |
| 2844 | |
| 2845 | if (hdr->type != IPC_ROUTER_CTRL_CMD_DATA) { |
| 2846 | process_control_msg(xprt_info, pkt); |
| 2847 | goto read_next_pkt1; |
| 2848 | } |
| 2849 | |
| 2850 | port_ptr = ipc_router_get_port_ref(hdr->dst_port_id); |
| 2851 | if (!port_ptr) { |
| 2852 | IPC_RTR_ERR("%s: No local port id %08x\n", __func__, |
| 2853 | hdr->dst_port_id); |
| 2854 | goto read_next_pkt1; |
| 2855 | } |
| 2856 | |
| 2857 | rport_ptr = ipc_router_get_rport_ref(hdr->src_node_id, |
| 2858 | hdr->src_port_id); |
| 2859 | if (!rport_ptr) { |
| 2860 | rport_ptr = ipc_router_create_rport(hdr->src_node_id, |
| 2861 | hdr->src_port_id, |
| 2862 | xprt_info); |
| 2863 | if (!rport_ptr) { |
| 2864 | IPC_RTR_ERR( |
| 2865 | "%s: Rmt Prt %08x:%08x create failed\n", |
| 2866 | __func__, hdr->src_node_id, |
| 2867 | hdr->src_port_id); |
| 2868 | goto read_next_pkt2; |
| 2869 | } |
| 2870 | } |
| 2871 | |
| 2872 | ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_RX, |
| 2873 | pkt, hdr, port_ptr, rport_ptr); |
| 2874 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2875 | post_pkt_to_port(port_ptr, pkt, 0); |
| 2876 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2877 | continue; |
| 2878 | read_next_pkt2: |
| 2879 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 2880 | read_next_pkt1: |
| 2881 | release_pkt(pkt); |
| 2882 | } |
| 2883 | } |
| 2884 | |
| 2885 | int msm_ipc_router_register_server(struct msm_ipc_port *port_ptr, |
| 2886 | struct msm_ipc_addr *name) |
| 2887 | { |
| 2888 | struct msm_ipc_server *server; |
| 2889 | union rr_control_msg ctl; |
| 2890 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2891 | |
| 2892 | if (!port_ptr || !name) |
| 2893 | return -EINVAL; |
| 2894 | |
Karthikeyan Ramasubramanian | 63cf359 | 2016-12-15 08:13:20 -0700 | [diff] [blame] | 2895 | if (port_ptr->type != CLIENT_PORT) |
| 2896 | return -EINVAL; |
| 2897 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2898 | if (name->addrtype != MSM_IPC_ADDR_NAME) |
| 2899 | return -EINVAL; |
| 2900 | |
| 2901 | rport_ptr = ipc_router_create_rport(IPC_ROUTER_NID_LOCAL, |
| 2902 | port_ptr->this_port.port_id, NULL); |
| 2903 | if (!rport_ptr) { |
| 2904 | IPC_RTR_ERR("%s: RPort %08x:%08x creation failed\n", __func__, |
| 2905 | IPC_ROUTER_NID_LOCAL, port_ptr->this_port.port_id); |
| 2906 | return -ENOMEM; |
| 2907 | } |
| 2908 | |
| 2909 | server = msm_ipc_router_create_server(name->addr.port_name.service, |
| 2910 | name->addr.port_name.instance, |
| 2911 | IPC_ROUTER_NID_LOCAL, |
| 2912 | port_ptr->this_port.port_id, |
| 2913 | NULL); |
| 2914 | if (!server) { |
| 2915 | IPC_RTR_ERR("%s: Server %08x:%08x Create failed\n", |
| 2916 | __func__, name->addr.port_name.service, |
| 2917 | name->addr.port_name.instance); |
| 2918 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2919 | ipc_router_destroy_rport(rport_ptr); |
| 2920 | return -ENOMEM; |
| 2921 | } |
| 2922 | |
| 2923 | memset(&ctl, 0, sizeof(ctl)); |
| 2924 | ctl.cmd = IPC_ROUTER_CTRL_CMD_NEW_SERVER; |
| 2925 | ctl.srv.service = server->name.service; |
| 2926 | ctl.srv.instance = server->name.instance; |
| 2927 | ctl.srv.node_id = IPC_ROUTER_NID_LOCAL; |
| 2928 | ctl.srv.port_id = port_ptr->this_port.port_id; |
| 2929 | broadcast_ctl_msg(&ctl); |
| 2930 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2931 | port_ptr->type = SERVER_PORT; |
| 2932 | port_ptr->mode_info.mode = MULTI_LINK_MODE; |
| 2933 | port_ptr->port_name.service = server->name.service; |
| 2934 | port_ptr->port_name.instance = server->name.instance; |
| 2935 | port_ptr->rport_info = rport_ptr; |
| 2936 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2937 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 2938 | kref_put(&server->ref, ipc_router_release_server); |
| 2939 | return 0; |
| 2940 | } |
| 2941 | |
| 2942 | int msm_ipc_router_unregister_server(struct msm_ipc_port *port_ptr) |
| 2943 | { |
| 2944 | struct msm_ipc_server *server; |
| 2945 | union rr_control_msg ctl; |
| 2946 | struct msm_ipc_router_remote_port *rport_ptr; |
| 2947 | |
| 2948 | if (!port_ptr) |
| 2949 | return -EINVAL; |
| 2950 | |
| 2951 | if (port_ptr->type != SERVER_PORT) { |
| 2952 | IPC_RTR_ERR("%s: Trying to unregister a non-server port\n", |
| 2953 | __func__); |
| 2954 | return -EINVAL; |
| 2955 | } |
| 2956 | |
| 2957 | if (port_ptr->this_port.node_id != IPC_ROUTER_NID_LOCAL) { |
| 2958 | IPC_RTR_ERR( |
| 2959 | "%s: Trying to unregister a remote server locally\n", |
| 2960 | __func__); |
| 2961 | return -EINVAL; |
| 2962 | } |
| 2963 | |
| 2964 | server = ipc_router_get_server_ref(port_ptr->port_name.service, |
| 2965 | port_ptr->port_name.instance, |
| 2966 | port_ptr->this_port.node_id, |
| 2967 | port_ptr->this_port.port_id); |
| 2968 | if (!server) { |
| 2969 | IPC_RTR_ERR("%s: Server lookup failed\n", __func__); |
| 2970 | return -ENODEV; |
| 2971 | } |
| 2972 | |
| 2973 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2974 | port_ptr->type = CLIENT_PORT; |
| 2975 | rport_ptr = (struct msm_ipc_router_remote_port *)port_ptr->rport_info; |
| 2976 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2977 | if (rport_ptr) |
| 2978 | ipc_router_reset_conn(rport_ptr); |
| 2979 | memset(&ctl, 0, sizeof(ctl)); |
| 2980 | ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| 2981 | ctl.srv.service = server->name.service; |
| 2982 | ctl.srv.instance = server->name.instance; |
| 2983 | ctl.srv.node_id = IPC_ROUTER_NID_LOCAL; |
| 2984 | ctl.srv.port_id = port_ptr->this_port.port_id; |
| 2985 | kref_put(&server->ref, ipc_router_release_server); |
| 2986 | ipc_router_destroy_server(server, port_ptr->this_port.node_id, |
| 2987 | port_ptr->this_port.port_id); |
| 2988 | broadcast_ctl_msg(&ctl); |
| 2989 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 2990 | port_ptr->type = CLIENT_PORT; |
| 2991 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 2992 | return 0; |
| 2993 | } |
| 2994 | |
| 2995 | static int loopback_data(struct msm_ipc_port *src, |
| 2996 | u32 port_id, |
| 2997 | struct rr_packet *pkt) |
| 2998 | { |
| 2999 | struct msm_ipc_port *port_ptr; |
| 3000 | struct sk_buff *temp_skb; |
| 3001 | int align_size; |
| 3002 | |
| 3003 | if (!pkt) { |
| 3004 | IPC_RTR_ERR("%s: Invalid pkt pointer\n", __func__); |
| 3005 | return -EINVAL; |
| 3006 | } |
| 3007 | |
| 3008 | temp_skb = skb_peek_tail(pkt->pkt_fragment_q); |
Chris Lew | 42ea961 | 2017-10-04 15:58:16 -0700 | [diff] [blame] | 3009 | if (!temp_skb) { |
| 3010 | IPC_RTR_ERR("%s: Empty skb\n", __func__); |
| 3011 | return -EINVAL; |
| 3012 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3013 | align_size = ALIGN_SIZE(pkt->length); |
| 3014 | skb_put(temp_skb, align_size); |
| 3015 | pkt->length += align_size; |
| 3016 | |
| 3017 | port_ptr = ipc_router_get_port_ref(port_id); |
| 3018 | if (!port_ptr) { |
| 3019 | IPC_RTR_ERR("%s: Local port %d not present\n", __func__, |
| 3020 | port_id); |
| 3021 | return -ENODEV; |
| 3022 | } |
| 3023 | post_pkt_to_port(port_ptr, pkt, 1); |
| 3024 | update_comm_mode_info(&src->mode_info, NULL); |
| 3025 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 3026 | |
| 3027 | return pkt->hdr.size; |
| 3028 | } |
| 3029 | |
| 3030 | static int ipc_router_tx_wait(struct msm_ipc_port *src, |
| 3031 | struct msm_ipc_router_remote_port *rport_ptr, |
| 3032 | u32 *set_confirm_rx, |
| 3033 | long timeout) |
| 3034 | { |
| 3035 | struct msm_ipc_resume_tx_port *resume_tx_port; |
| 3036 | int ret; |
| 3037 | |
| 3038 | if (unlikely(!src || !rport_ptr)) |
| 3039 | return -EINVAL; |
| 3040 | |
| 3041 | for (;;) { |
| 3042 | mutex_lock(&rport_ptr->rport_lock_lhb2); |
| 3043 | if (rport_ptr->status == RESET) { |
| 3044 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 3045 | IPC_RTR_ERR("%s: RPort %08x:%08x is in reset state\n", |
| 3046 | __func__, rport_ptr->node_id, |
| 3047 | rport_ptr->port_id); |
| 3048 | return -ENETRESET; |
| 3049 | } |
| 3050 | |
| 3051 | if (rport_ptr->tx_quota_cnt < IPC_ROUTER_HIGH_RX_QUOTA) |
| 3052 | break; |
| 3053 | |
| 3054 | if (msm_ipc_router_lookup_resume_tx_port( |
| 3055 | rport_ptr, src->this_port.port_id)) |
| 3056 | goto check_timeo; |
| 3057 | |
| 3058 | resume_tx_port = |
| 3059 | kzalloc(sizeof(struct msm_ipc_resume_tx_port), |
| 3060 | GFP_KERNEL); |
| 3061 | if (!resume_tx_port) { |
| 3062 | IPC_RTR_ERR("%s: Resume_Tx port allocation failed\n", |
| 3063 | __func__); |
| 3064 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 3065 | return -ENOMEM; |
| 3066 | } |
| 3067 | INIT_LIST_HEAD(&resume_tx_port->list); |
| 3068 | resume_tx_port->port_id = src->this_port.port_id; |
| 3069 | resume_tx_port->node_id = src->this_port.node_id; |
| 3070 | list_add_tail(&resume_tx_port->list, |
| 3071 | &rport_ptr->resume_tx_port_list); |
| 3072 | check_timeo: |
| 3073 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 3074 | if (!timeout) { |
| 3075 | return -EAGAIN; |
| 3076 | } else if (timeout < 0) { |
| 3077 | ret = |
| 3078 | wait_event_interruptible(src->port_tx_wait_q, |
| 3079 | (rport_ptr->tx_quota_cnt != |
| 3080 | IPC_ROUTER_HIGH_RX_QUOTA || |
| 3081 | rport_ptr->status == RESET)); |
| 3082 | if (ret) |
| 3083 | return ret; |
| 3084 | } else { |
| 3085 | ret = wait_event_interruptible_timeout( |
| 3086 | src->port_tx_wait_q, |
| 3087 | (rport_ptr->tx_quota_cnt != |
| 3088 | IPC_ROUTER_HIGH_RX_QUOTA || |
| 3089 | rport_ptr->status == RESET), |
| 3090 | msecs_to_jiffies(timeout)); |
| 3091 | if (ret < 0) { |
| 3092 | return ret; |
| 3093 | } else if (ret == 0) { |
| 3094 | IPC_RTR_ERR("%s: Resume_tx Timeout %08x:%08x\n", |
| 3095 | __func__, rport_ptr->node_id, |
| 3096 | rport_ptr->port_id); |
| 3097 | return -ETIMEDOUT; |
| 3098 | } |
| 3099 | } |
| 3100 | } |
| 3101 | rport_ptr->tx_quota_cnt++; |
| 3102 | if (rport_ptr->tx_quota_cnt == IPC_ROUTER_LOW_RX_QUOTA) |
| 3103 | *set_confirm_rx = 1; |
| 3104 | mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| 3105 | return 0; |
| 3106 | } |
| 3107 | |
| 3108 | static int |
| 3109 | msm_ipc_router_write_pkt(struct msm_ipc_port *src, |
| 3110 | struct msm_ipc_router_remote_port *rport_ptr, |
| 3111 | struct rr_packet *pkt, long timeout) |
| 3112 | { |
| 3113 | struct rr_header_v1 *hdr; |
| 3114 | struct msm_ipc_router_xprt_info *xprt_info; |
| 3115 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3116 | struct sk_buff *temp_skb; |
| 3117 | int xprt_option; |
| 3118 | int ret; |
| 3119 | int align_size; |
| 3120 | u32 set_confirm_rx = 0; |
| 3121 | |
| 3122 | if (!rport_ptr || !src || !pkt) |
| 3123 | return -EINVAL; |
| 3124 | |
| 3125 | hdr = &pkt->hdr; |
| 3126 | hdr->version = IPC_ROUTER_V1; |
| 3127 | hdr->type = IPC_ROUTER_CTRL_CMD_DATA; |
| 3128 | hdr->src_node_id = src->this_port.node_id; |
| 3129 | hdr->src_port_id = src->this_port.port_id; |
| 3130 | hdr->size = pkt->length; |
| 3131 | hdr->control_flag = 0; |
| 3132 | hdr->dst_node_id = rport_ptr->node_id; |
| 3133 | hdr->dst_port_id = rport_ptr->port_id; |
| 3134 | |
| 3135 | ret = ipc_router_tx_wait(src, rport_ptr, &set_confirm_rx, timeout); |
| 3136 | if (ret < 0) |
| 3137 | return ret; |
| 3138 | if (set_confirm_rx) |
| 3139 | hdr->control_flag |= CONTROL_FLAG_CONFIRM_RX; |
| 3140 | |
| 3141 | if (hdr->dst_node_id == IPC_ROUTER_NID_LOCAL) { |
| 3142 | ipc_router_log_msg(local_log_ctx, |
| 3143 | IPC_ROUTER_LOG_EVENT_TX, pkt, hdr, src, |
| 3144 | rport_ptr); |
| 3145 | ret = loopback_data(src, hdr->dst_port_id, pkt); |
| 3146 | return ret; |
| 3147 | } |
| 3148 | |
| 3149 | rt_entry = ipc_router_get_rtentry_ref(hdr->dst_node_id); |
| 3150 | if (!rt_entry) { |
| 3151 | IPC_RTR_ERR("%s: Remote node %d not up\n", |
| 3152 | __func__, hdr->dst_node_id); |
| 3153 | return -ENODEV; |
| 3154 | } |
| 3155 | down_read(&rt_entry->lock_lha4); |
| 3156 | xprt_info = rt_entry->xprt_info; |
| 3157 | ret = ipc_router_get_xprt_info_ref(xprt_info); |
| 3158 | if (ret < 0) { |
| 3159 | IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| 3160 | up_read(&rt_entry->lock_lha4); |
| 3161 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3162 | return ret; |
| 3163 | } |
| 3164 | ret = prepend_header(pkt, xprt_info); |
| 3165 | if (ret < 0) { |
| 3166 | IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| 3167 | goto out_write_pkt; |
| 3168 | } |
| 3169 | xprt_option = xprt_info->xprt->get_option(xprt_info->xprt); |
| 3170 | if (!(xprt_option & FRAG_PKT_WRITE_ENABLE)) { |
| 3171 | ret = defragment_pkt(pkt); |
| 3172 | if (ret < 0) |
| 3173 | goto out_write_pkt; |
| 3174 | } |
| 3175 | |
| 3176 | temp_skb = skb_peek_tail(pkt->pkt_fragment_q); |
Chris Lew | 42ea961 | 2017-10-04 15:58:16 -0700 | [diff] [blame] | 3177 | if (!temp_skb) { |
| 3178 | IPC_RTR_ERR("%s: Abort invalid pkt\n", __func__); |
| 3179 | ret = -EINVAL; |
| 3180 | goto out_write_pkt; |
| 3181 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3182 | align_size = ALIGN_SIZE(pkt->length); |
| 3183 | skb_put(temp_skb, align_size); |
| 3184 | pkt->length += align_size; |
| 3185 | mutex_lock(&xprt_info->tx_lock_lhb2); |
| 3186 | ret = xprt_info->xprt->write(pkt, pkt->length, xprt_info->xprt); |
| 3187 | mutex_unlock(&xprt_info->tx_lock_lhb2); |
| 3188 | out_write_pkt: |
| 3189 | up_read(&rt_entry->lock_lha4); |
| 3190 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3191 | |
| 3192 | if (ret < 0) { |
| 3193 | IPC_RTR_ERR("%s: Write on XPRT failed\n", __func__); |
| 3194 | ipc_router_log_msg(xprt_info->log_ctx, |
| 3195 | IPC_ROUTER_LOG_EVENT_TX_ERR, pkt, hdr, src, |
| 3196 | rport_ptr); |
| 3197 | |
| 3198 | ipc_router_put_xprt_info_ref(xprt_info); |
| 3199 | return ret; |
| 3200 | } |
| 3201 | update_comm_mode_info(&src->mode_info, xprt_info); |
| 3202 | ipc_router_log_msg(xprt_info->log_ctx, |
| 3203 | IPC_ROUTER_LOG_EVENT_TX, pkt, hdr, src, rport_ptr); |
| 3204 | |
| 3205 | ipc_router_put_xprt_info_ref(xprt_info); |
| 3206 | return hdr->size; |
| 3207 | } |
| 3208 | |
| 3209 | int msm_ipc_router_send_to(struct msm_ipc_port *src, |
| 3210 | struct sk_buff_head *data, |
| 3211 | struct msm_ipc_addr *dest, |
| 3212 | long timeout) |
| 3213 | { |
| 3214 | u32 dst_node_id = 0, dst_port_id = 0; |
| 3215 | struct msm_ipc_server *server; |
| 3216 | struct msm_ipc_server_port *server_port; |
| 3217 | struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| 3218 | struct msm_ipc_router_remote_port *src_rport_ptr = NULL; |
| 3219 | struct rr_packet *pkt; |
| 3220 | int ret; |
| 3221 | |
| 3222 | if (!src || !data || !dest) { |
| 3223 | IPC_RTR_ERR("%s: Invalid Parameters\n", __func__); |
| 3224 | return -EINVAL; |
| 3225 | } |
| 3226 | |
| 3227 | /* Resolve Address*/ |
| 3228 | if (dest->addrtype == MSM_IPC_ADDR_ID) { |
| 3229 | dst_node_id = dest->addr.port_addr.node_id; |
| 3230 | dst_port_id = dest->addr.port_addr.port_id; |
| 3231 | } else if (dest->addrtype == MSM_IPC_ADDR_NAME) { |
| 3232 | server = |
| 3233 | ipc_router_get_server_ref(dest->addr.port_name.service, |
| 3234 | dest->addr.port_name.instance, |
| 3235 | 0, 0); |
| 3236 | if (!server) { |
| 3237 | IPC_RTR_ERR("%s: Destination not reachable\n", |
| 3238 | __func__); |
| 3239 | return -ENODEV; |
| 3240 | } |
| 3241 | server_port = list_first_entry(&server->server_port_list, |
| 3242 | struct msm_ipc_server_port, |
| 3243 | list); |
| 3244 | dst_node_id = server_port->server_addr.node_id; |
| 3245 | dst_port_id = server_port->server_addr.port_id; |
| 3246 | kref_put(&server->ref, ipc_router_release_server); |
| 3247 | } |
| 3248 | |
| 3249 | rport_ptr = ipc_router_get_rport_ref(dst_node_id, dst_port_id); |
| 3250 | if (!rport_ptr) { |
| 3251 | IPC_RTR_ERR("%s: Remote port not found\n", __func__); |
| 3252 | return -ENODEV; |
| 3253 | } |
| 3254 | |
| 3255 | if (src->check_send_permissions) { |
| 3256 | ret = src->check_send_permissions(rport_ptr->sec_rule); |
| 3257 | if (ret <= 0) { |
| 3258 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3259 | IPC_RTR_ERR("%s: permission failure for %s\n", |
| 3260 | __func__, current->comm); |
| 3261 | return -EPERM; |
| 3262 | } |
| 3263 | } |
| 3264 | |
| 3265 | if (dst_node_id == IPC_ROUTER_NID_LOCAL && !src->rport_info) { |
| 3266 | src_rport_ptr = ipc_router_create_rport(IPC_ROUTER_NID_LOCAL, |
| 3267 | src->this_port.port_id, |
| 3268 | NULL); |
| 3269 | if (!src_rport_ptr) { |
| 3270 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3271 | IPC_RTR_ERR("%s: RPort creation failed\n", __func__); |
| 3272 | return -ENOMEM; |
| 3273 | } |
| 3274 | mutex_lock(&src->port_lock_lhc3); |
| 3275 | src->rport_info = src_rport_ptr; |
| 3276 | mutex_unlock(&src->port_lock_lhc3); |
| 3277 | kref_put(&src_rport_ptr->ref, ipc_router_release_rport); |
| 3278 | } |
| 3279 | |
| 3280 | pkt = create_pkt(data); |
| 3281 | if (!pkt) { |
| 3282 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3283 | IPC_RTR_ERR("%s: Pkt creation failed\n", __func__); |
| 3284 | return -ENOMEM; |
| 3285 | } |
| 3286 | |
| 3287 | ret = msm_ipc_router_write_pkt(src, rport_ptr, pkt, timeout); |
| 3288 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| 3289 | if (ret < 0) |
| 3290 | pkt->pkt_fragment_q = NULL; |
| 3291 | release_pkt(pkt); |
| 3292 | |
| 3293 | return ret; |
| 3294 | } |
| 3295 | |
| 3296 | int msm_ipc_router_send_msg(struct msm_ipc_port *src, |
| 3297 | struct msm_ipc_addr *dest, |
| 3298 | void *data, unsigned int data_len) |
| 3299 | { |
| 3300 | struct sk_buff_head *out_skb_head; |
| 3301 | int ret; |
| 3302 | |
| 3303 | out_skb_head = msm_ipc_router_buf_to_skb(data, data_len); |
| 3304 | if (!out_skb_head) { |
| 3305 | IPC_RTR_ERR("%s: SKB conversion failed\n", __func__); |
| 3306 | return -EFAULT; |
| 3307 | } |
| 3308 | |
| 3309 | ret = msm_ipc_router_send_to(src, out_skb_head, dest, 0); |
| 3310 | if (ret < 0) { |
| 3311 | if (ret != -EAGAIN) |
| 3312 | IPC_RTR_ERR( |
| 3313 | "%s: msm_ipc_router_send_to failed - ret: %d\n", |
| 3314 | __func__, ret); |
| 3315 | msm_ipc_router_free_skb(out_skb_head); |
| 3316 | return ret; |
| 3317 | } |
| 3318 | return 0; |
| 3319 | } |
| 3320 | |
| 3321 | /** |
| 3322 | * msm_ipc_router_send_resume_tx() - Send Resume_Tx message |
| 3323 | * @data: Pointer to received data packet that has confirm_rx bit set |
| 3324 | * |
| 3325 | * @return: On success, number of bytes transferred is returned, else |
| 3326 | * standard linux error code is returned. |
| 3327 | * |
| 3328 | * This function sends the Resume_Tx event to the remote node that |
| 3329 | * sent the data with confirm_rx field set. In case of a multi-hop |
| 3330 | * scenario also, this function makes sure that the destination node_id |
| 3331 | * to which the resume_tx event should reach is right. |
| 3332 | */ |
| 3333 | static int msm_ipc_router_send_resume_tx(void *data) |
| 3334 | { |
| 3335 | union rr_control_msg msg; |
| 3336 | struct rr_header_v1 *hdr = (struct rr_header_v1 *)data; |
| 3337 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3338 | int ret; |
| 3339 | |
| 3340 | memset(&msg, 0, sizeof(msg)); |
| 3341 | msg.cmd = IPC_ROUTER_CTRL_CMD_RESUME_TX; |
| 3342 | msg.cli.node_id = hdr->dst_node_id; |
| 3343 | msg.cli.port_id = hdr->dst_port_id; |
| 3344 | rt_entry = ipc_router_get_rtentry_ref(hdr->src_node_id); |
| 3345 | if (!rt_entry) { |
| 3346 | IPC_RTR_ERR("%s: %d Node is not present", __func__, |
| 3347 | hdr->src_node_id); |
| 3348 | return -ENODEV; |
| 3349 | } |
| 3350 | ret = ipc_router_get_xprt_info_ref(rt_entry->xprt_info); |
| 3351 | if (ret < 0) { |
| 3352 | IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| 3353 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3354 | return ret; |
| 3355 | } |
| 3356 | ret = ipc_router_send_ctl_msg(rt_entry->xprt_info, &msg, |
| 3357 | hdr->src_node_id); |
| 3358 | ipc_router_put_xprt_info_ref(rt_entry->xprt_info); |
| 3359 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 3360 | if (ret < 0) |
| 3361 | IPC_RTR_ERR( |
| 3362 | "%s: Send Resume_Tx Failed SRC_NODE: %d SRC_PORT: %d DEST_NODE: %d", |
| 3363 | __func__, hdr->dst_node_id, hdr->dst_port_id, |
| 3364 | hdr->src_node_id); |
| 3365 | |
| 3366 | return ret; |
| 3367 | } |
| 3368 | |
| 3369 | int msm_ipc_router_read(struct msm_ipc_port *port_ptr, |
| 3370 | struct rr_packet **read_pkt, |
| 3371 | size_t buf_len) |
| 3372 | { |
| 3373 | struct rr_packet *pkt; |
| 3374 | |
| 3375 | if (!port_ptr || !read_pkt) |
| 3376 | return -EINVAL; |
| 3377 | |
| 3378 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3379 | if (list_empty(&port_ptr->port_rx_q)) { |
| 3380 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3381 | return -EAGAIN; |
| 3382 | } |
| 3383 | |
| 3384 | pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, list); |
| 3385 | if ((buf_len) && (pkt->hdr.size > buf_len)) { |
| 3386 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3387 | return -ETOOSMALL; |
| 3388 | } |
| 3389 | list_del(&pkt->list); |
| 3390 | if (list_empty(&port_ptr->port_rx_q)) |
| 3391 | __pm_relax(port_ptr->port_rx_ws); |
| 3392 | *read_pkt = pkt; |
| 3393 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3394 | if (pkt->hdr.control_flag & CONTROL_FLAG_CONFIRM_RX) |
| 3395 | msm_ipc_router_send_resume_tx(&pkt->hdr); |
| 3396 | |
| 3397 | return pkt->length; |
| 3398 | } |
| 3399 | |
| 3400 | /** |
| 3401 | * msm_ipc_router_rx_data_wait() - Wait for new message destined to a local |
| 3402 | * port. |
| 3403 | * @port_ptr: Pointer to the local port |
| 3404 | * @timeout: < 0 timeout indicates infinite wait till a message arrives. |
| 3405 | * > 0 timeout indicates the wait time. |
| 3406 | * 0 indicates that we do not wait. |
| 3407 | * @return: 0 if there are pending messages to read, |
| 3408 | * standard Linux error code otherwise. |
| 3409 | * |
| 3410 | * Checks for the availability of messages that are destined to a local port. |
| 3411 | * If no messages are present then waits as per @timeout. |
| 3412 | */ |
| 3413 | int msm_ipc_router_rx_data_wait(struct msm_ipc_port *port_ptr, long timeout) |
| 3414 | { |
| 3415 | int ret = 0; |
| 3416 | |
| 3417 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3418 | while (list_empty(&port_ptr->port_rx_q)) { |
| 3419 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3420 | if (timeout < 0) { |
| 3421 | ret = wait_event_interruptible( |
| 3422 | port_ptr->port_rx_wait_q, |
| 3423 | !list_empty(&port_ptr->port_rx_q)); |
| 3424 | if (ret) |
| 3425 | return ret; |
| 3426 | } else if (timeout > 0) { |
| 3427 | timeout = wait_event_interruptible_timeout( |
| 3428 | port_ptr->port_rx_wait_q, |
| 3429 | !list_empty(&port_ptr->port_rx_q), |
| 3430 | timeout); |
| 3431 | if (timeout < 0) |
| 3432 | return -EFAULT; |
| 3433 | } |
| 3434 | if (timeout == 0) |
| 3435 | return -ENOMSG; |
| 3436 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3437 | } |
| 3438 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3439 | |
| 3440 | return ret; |
| 3441 | } |
| 3442 | |
| 3443 | /** |
| 3444 | * msm_ipc_router_recv_from() - Receive messages destined to a local port. |
| 3445 | * @port_ptr: Pointer to the local port |
| 3446 | * @pkt : Pointer to the router-to-router packet |
| 3447 | * @src: Pointer to local port address |
| 3448 | * @timeout: < 0 timeout indicates infinite wait till a message arrives. |
| 3449 | * > 0 timeout indicates the wait time. |
| 3450 | * 0 indicates that we do not wait. |
| 3451 | * @return: = Number of bytes read(On successful read operation). |
| 3452 | * = -ENOMSG (If there are no pending messages and timeout is 0). |
| 3453 | * = -EINVAL (If either of the arguments, port_ptr or data is invalid) |
| 3454 | * = -EFAULT (If there are no pending messages when timeout is > 0 |
| 3455 | * and the wait_event_interruptible_timeout has returned value > 0) |
| 3456 | * = -ERESTARTSYS (If there are no pending messages when timeout |
| 3457 | * is < 0 and wait_event_interruptible was interrupted by a signal) |
| 3458 | * |
| 3459 | * This function reads the messages that are destined for a local port. It |
| 3460 | * is used by modules that exist with-in the kernel and use IPC Router for |
| 3461 | * transport. The function checks if there are any messages that are already |
| 3462 | * received. If yes, it reads them, else it waits as per the timeout value. |
| 3463 | * On a successful read, the return value of the function indicates the number |
| 3464 | * of bytes that are read. |
| 3465 | */ |
| 3466 | int msm_ipc_router_recv_from(struct msm_ipc_port *port_ptr, |
| 3467 | struct rr_packet **pkt, |
| 3468 | struct msm_ipc_addr *src, |
| 3469 | long timeout) |
| 3470 | { |
| 3471 | int ret, data_len, align_size; |
| 3472 | struct sk_buff *temp_skb; |
| 3473 | struct rr_header_v1 *hdr = NULL; |
| 3474 | |
| 3475 | if (!port_ptr || !pkt) { |
| 3476 | IPC_RTR_ERR("%s: Invalid pointers being passed\n", __func__); |
| 3477 | return -EINVAL; |
| 3478 | } |
| 3479 | |
| 3480 | *pkt = NULL; |
| 3481 | |
| 3482 | ret = msm_ipc_router_rx_data_wait(port_ptr, timeout); |
| 3483 | if (ret) |
| 3484 | return ret; |
| 3485 | |
| 3486 | ret = msm_ipc_router_read(port_ptr, pkt, 0); |
| 3487 | if (ret <= 0 || !(*pkt)) |
| 3488 | return ret; |
| 3489 | |
| 3490 | hdr = &((*pkt)->hdr); |
| 3491 | if (src) { |
| 3492 | src->addrtype = MSM_IPC_ADDR_ID; |
| 3493 | src->addr.port_addr.node_id = hdr->src_node_id; |
| 3494 | src->addr.port_addr.port_id = hdr->src_port_id; |
| 3495 | } |
| 3496 | |
| 3497 | data_len = hdr->size; |
| 3498 | align_size = ALIGN_SIZE(data_len); |
| 3499 | if (align_size) { |
| 3500 | temp_skb = skb_peek_tail((*pkt)->pkt_fragment_q); |
Chris Lew | 42ea961 | 2017-10-04 15:58:16 -0700 | [diff] [blame] | 3501 | if (temp_skb) |
| 3502 | skb_trim(temp_skb, (temp_skb->len - align_size)); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3503 | } |
| 3504 | return data_len; |
| 3505 | } |
| 3506 | |
| 3507 | int msm_ipc_router_read_msg(struct msm_ipc_port *port_ptr, |
| 3508 | struct msm_ipc_addr *src, |
| 3509 | unsigned char **data, |
| 3510 | unsigned int *len) |
| 3511 | { |
| 3512 | struct rr_packet *pkt; |
| 3513 | int ret; |
| 3514 | |
| 3515 | ret = msm_ipc_router_recv_from(port_ptr, &pkt, src, 0); |
| 3516 | if (ret < 0) { |
| 3517 | if (ret != -ENOMSG) |
| 3518 | IPC_RTR_ERR( |
| 3519 | "%s: msm_ipc_router_recv_from failed - ret: %d\n", |
| 3520 | __func__, ret); |
| 3521 | return ret; |
| 3522 | } |
| 3523 | |
| 3524 | *data = msm_ipc_router_skb_to_buf(pkt->pkt_fragment_q, ret); |
| 3525 | if (!(*data)) { |
| 3526 | IPC_RTR_ERR("%s: Buf conversion failed\n", __func__); |
| 3527 | release_pkt(pkt); |
| 3528 | return -ENOMEM; |
| 3529 | } |
| 3530 | |
| 3531 | *len = ret; |
| 3532 | release_pkt(pkt); |
| 3533 | return 0; |
| 3534 | } |
| 3535 | |
| 3536 | /** |
| 3537 | * msm_ipc_router_create_port() - Create a IPC Router port/endpoint |
| 3538 | * @notify: Callback function to notify any event on the port. |
| 3539 | * @event: Event ID to be handled. |
| 3540 | * @oob_data: Any out-of-band data associated with the event. |
| 3541 | * @oob_data_len: Size of the out-of-band data, if valid. |
| 3542 | * @priv: Private data registered during the port creation. |
| 3543 | * @priv: Private info to be passed while the notification is generated. |
| 3544 | * |
| 3545 | * @return: Pointer to the port on success, NULL on error. |
| 3546 | */ |
| 3547 | struct msm_ipc_port *msm_ipc_router_create_port( |
| 3548 | void (*notify)(unsigned int event, void *oob_data, |
| 3549 | size_t oob_data_len, void *priv), |
| 3550 | void *priv) |
| 3551 | { |
| 3552 | struct msm_ipc_port *port_ptr; |
| 3553 | int ret; |
| 3554 | |
| 3555 | ret = ipc_router_core_init(); |
| 3556 | if (ret < 0) { |
| 3557 | IPC_RTR_ERR("%s: Error %d initializing IPC Router\n", |
| 3558 | __func__, ret); |
| 3559 | return NULL; |
| 3560 | } |
| 3561 | |
| 3562 | port_ptr = msm_ipc_router_create_raw_port(NULL, notify, priv); |
| 3563 | if (!port_ptr) |
| 3564 | IPC_RTR_ERR("%s: port_ptr alloc failed\n", __func__); |
| 3565 | |
| 3566 | return port_ptr; |
| 3567 | } |
| 3568 | |
| 3569 | int msm_ipc_router_close_port(struct msm_ipc_port *port_ptr) |
| 3570 | { |
| 3571 | union rr_control_msg msg; |
| 3572 | struct msm_ipc_server *server; |
| 3573 | struct msm_ipc_router_remote_port *rport_ptr; |
| 3574 | |
| 3575 | if (!port_ptr) |
| 3576 | return -EINVAL; |
| 3577 | |
| 3578 | if (port_ptr->type == SERVER_PORT || port_ptr->type == CLIENT_PORT) { |
| 3579 | down_write(&local_ports_lock_lhc2); |
| 3580 | list_del(&port_ptr->list); |
| 3581 | up_write(&local_ports_lock_lhc2); |
| 3582 | |
| 3583 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 3584 | rport_ptr = (struct msm_ipc_router_remote_port *) |
| 3585 | port_ptr->rport_info; |
| 3586 | port_ptr->rport_info = NULL; |
| 3587 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 3588 | if (rport_ptr) { |
| 3589 | ipc_router_reset_conn(rport_ptr); |
| 3590 | ipc_router_destroy_rport(rport_ptr); |
| 3591 | } |
| 3592 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3593 | /* Server port could have been a client port earlier. |
| 3594 | * Send REMOVE_CLIENT message in either case. |
| 3595 | */ |
| 3596 | msm_ipc_router_send_remove_client(&port_ptr->mode_info, |
| 3597 | port_ptr->this_port.node_id, |
| 3598 | port_ptr->this_port.port_id); |
| 3599 | } else if (port_ptr->type == CONTROL_PORT) { |
| 3600 | down_write(&control_ports_lock_lha5); |
| 3601 | list_del(&port_ptr->list); |
| 3602 | up_write(&control_ports_lock_lha5); |
| 3603 | } else if (port_ptr->type == IRSC_PORT) { |
| 3604 | down_write(&local_ports_lock_lhc2); |
| 3605 | list_del(&port_ptr->list); |
| 3606 | up_write(&local_ports_lock_lhc2); |
| 3607 | signal_irsc_completion(); |
| 3608 | } |
| 3609 | |
| 3610 | if (port_ptr->type == SERVER_PORT) { |
| 3611 | server = ipc_router_get_server_ref( |
| 3612 | port_ptr->port_name.service, |
| 3613 | port_ptr->port_name.instance, |
| 3614 | port_ptr->this_port.node_id, |
| 3615 | port_ptr->this_port.port_id); |
| 3616 | if (server) { |
| 3617 | kref_put(&server->ref, ipc_router_release_server); |
| 3618 | ipc_router_destroy_server(server, |
| 3619 | port_ptr->this_port.node_id, |
| 3620 | port_ptr->this_port.port_id); |
| 3621 | } |
Arun Prakash | 72cd412 | 2020-04-25 21:23:11 +0530 | [diff] [blame] | 3622 | /** |
| 3623 | * released server information from hash table, now |
| 3624 | * it is safe to broadcast remove server message so that |
| 3625 | * next call to lookup server will not succeed until |
| 3626 | * server open the port again |
| 3627 | */ |
| 3628 | memset(&msg, 0, sizeof(msg)); |
| 3629 | msg.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| 3630 | msg.srv.service = port_ptr->port_name.service; |
| 3631 | msg.srv.instance = port_ptr->port_name.instance; |
| 3632 | msg.srv.node_id = port_ptr->this_port.node_id; |
| 3633 | msg.srv.port_id = port_ptr->this_port.port_id; |
| 3634 | broadcast_ctl_msg(&msg); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3635 | } |
| 3636 | |
| 3637 | mutex_lock(&port_ptr->port_lock_lhc3); |
| 3638 | rport_ptr = (struct msm_ipc_router_remote_port *)port_ptr->rport_info; |
| 3639 | port_ptr->rport_info = NULL; |
| 3640 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 3641 | if (rport_ptr) |
| 3642 | ipc_router_destroy_rport(rport_ptr); |
| 3643 | |
| 3644 | kref_put(&port_ptr->ref, ipc_router_release_port); |
| 3645 | return 0; |
| 3646 | } |
| 3647 | |
| 3648 | int msm_ipc_router_get_curr_pkt_size(struct msm_ipc_port *port_ptr) |
| 3649 | { |
| 3650 | struct rr_packet *pkt; |
| 3651 | int rc = 0; |
| 3652 | |
| 3653 | if (!port_ptr) |
| 3654 | return -EINVAL; |
| 3655 | |
| 3656 | mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| 3657 | if (!list_empty(&port_ptr->port_rx_q)) { |
| 3658 | pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, |
| 3659 | list); |
| 3660 | rc = pkt->hdr.size; |
| 3661 | } |
| 3662 | mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| 3663 | |
| 3664 | return rc; |
| 3665 | } |
| 3666 | |
| 3667 | int msm_ipc_router_bind_control_port(struct msm_ipc_port *port_ptr) |
| 3668 | { |
| 3669 | if (unlikely(!port_ptr || port_ptr->type != CLIENT_PORT)) |
| 3670 | return -EINVAL; |
| 3671 | |
| 3672 | down_write(&local_ports_lock_lhc2); |
| 3673 | list_del(&port_ptr->list); |
| 3674 | up_write(&local_ports_lock_lhc2); |
| 3675 | port_ptr->type = CONTROL_PORT; |
| 3676 | down_write(&control_ports_lock_lha5); |
| 3677 | list_add_tail(&port_ptr->list, &control_ports); |
| 3678 | up_write(&control_ports_lock_lha5); |
| 3679 | |
| 3680 | return 0; |
| 3681 | } |
| 3682 | |
| 3683 | int msm_ipc_router_lookup_server_name(struct msm_ipc_port_name *srv_name, |
| 3684 | struct msm_ipc_server_info *srv_info, |
| 3685 | int num_entries_in_array, u32 lookup_mask) |
| 3686 | { |
| 3687 | struct msm_ipc_server *server; |
| 3688 | struct msm_ipc_server_port *server_port; |
| 3689 | int key, i = 0; /*num_entries_found*/ |
| 3690 | |
| 3691 | if (!srv_name) { |
| 3692 | IPC_RTR_ERR("%s: Invalid srv_name\n", __func__); |
| 3693 | return -EINVAL; |
| 3694 | } |
| 3695 | |
| 3696 | if (num_entries_in_array && !srv_info) { |
| 3697 | IPC_RTR_ERR("%s: srv_info NULL\n", __func__); |
| 3698 | return -EINVAL; |
| 3699 | } |
| 3700 | |
| 3701 | down_read(&server_list_lock_lha2); |
| 3702 | key = (srv_name->service & (SRV_HASH_SIZE - 1)); |
| 3703 | list_for_each_entry(server, &server_list[key], list) { |
| 3704 | if ((server->name.service != srv_name->service) || |
| 3705 | ((server->name.instance & lookup_mask) != |
| 3706 | srv_name->instance)) |
| 3707 | continue; |
| 3708 | |
| 3709 | list_for_each_entry(server_port, &server->server_port_list, |
| 3710 | list) { |
| 3711 | if (i < num_entries_in_array) { |
| 3712 | srv_info[i].node_id = |
| 3713 | server_port->server_addr.node_id; |
| 3714 | srv_info[i].port_id = |
| 3715 | server_port->server_addr.port_id; |
| 3716 | srv_info[i].service = server->name.service; |
| 3717 | srv_info[i].instance = server->name.instance; |
| 3718 | } |
| 3719 | i++; |
| 3720 | } |
| 3721 | } |
| 3722 | up_read(&server_list_lock_lha2); |
| 3723 | |
| 3724 | return i; |
| 3725 | } |
| 3726 | |
| 3727 | int msm_ipc_router_close(void) |
| 3728 | { |
| 3729 | struct msm_ipc_router_xprt_info *xprt_info, *tmp_xprt_info; |
| 3730 | |
| 3731 | down_write(&xprt_info_list_lock_lha5); |
| 3732 | list_for_each_entry_safe(xprt_info, tmp_xprt_info, |
| 3733 | &xprt_info_list, list) { |
| 3734 | xprt_info->xprt->close(xprt_info->xprt); |
| 3735 | list_del(&xprt_info->list); |
| 3736 | kfree(xprt_info); |
| 3737 | } |
| 3738 | up_write(&xprt_info_list_lock_lha5); |
| 3739 | return 0; |
| 3740 | } |
| 3741 | |
| 3742 | /** |
| 3743 | * pil_vote_load_worker() - Process vote to load the modem |
| 3744 | * |
| 3745 | * @work: Work item to process |
| 3746 | * |
| 3747 | * This function is called to process votes to load the modem that have been |
| 3748 | * queued by msm_ipc_load_default_node(). |
| 3749 | */ |
| 3750 | static void pil_vote_load_worker(struct work_struct *work) |
| 3751 | { |
| 3752 | struct pil_vote_info *vote_info; |
| 3753 | |
| 3754 | vote_info = container_of(work, struct pil_vote_info, load_work); |
| 3755 | if (strlen(default_peripheral)) { |
| 3756 | vote_info->pil_handle = subsystem_get(default_peripheral); |
| 3757 | if (IS_ERR(vote_info->pil_handle)) { |
| 3758 | IPC_RTR_ERR("%s: Failed to load %s\n", |
| 3759 | __func__, default_peripheral); |
| 3760 | vote_info->pil_handle = NULL; |
| 3761 | } |
| 3762 | } else { |
| 3763 | vote_info->pil_handle = NULL; |
| 3764 | } |
| 3765 | } |
| 3766 | |
| 3767 | /** |
| 3768 | * pil_vote_unload_worker() - Process vote to unload the modem |
| 3769 | * |
| 3770 | * @work: Work item to process |
| 3771 | * |
| 3772 | * This function is called to process votes to unload the modem that have been |
| 3773 | * queued by msm_ipc_unload_default_node(). |
| 3774 | */ |
| 3775 | static void pil_vote_unload_worker(struct work_struct *work) |
| 3776 | { |
| 3777 | struct pil_vote_info *vote_info; |
| 3778 | |
| 3779 | vote_info = container_of(work, struct pil_vote_info, unload_work); |
| 3780 | |
| 3781 | if (vote_info->pil_handle) { |
| 3782 | subsystem_put(vote_info->pil_handle); |
| 3783 | vote_info->pil_handle = NULL; |
| 3784 | } |
| 3785 | kfree(vote_info); |
| 3786 | } |
| 3787 | |
| 3788 | /** |
| 3789 | * msm_ipc_load_default_node() - Queue a vote to load the modem. |
| 3790 | * |
| 3791 | * @return: PIL vote info structure on success, NULL on failure. |
| 3792 | * |
| 3793 | * This function places a work item that loads the modem on the |
| 3794 | * single-threaded workqueue used for processing PIL votes to load |
| 3795 | * or unload the modem. |
| 3796 | */ |
| 3797 | void *msm_ipc_load_default_node(void) |
| 3798 | { |
| 3799 | struct pil_vote_info *vote_info; |
| 3800 | |
| 3801 | vote_info = kmalloc(sizeof(*vote_info), GFP_KERNEL); |
| 3802 | if (!vote_info) |
| 3803 | return vote_info; |
| 3804 | |
| 3805 | INIT_WORK(&vote_info->load_work, pil_vote_load_worker); |
| 3806 | queue_work(msm_ipc_router_workqueue, &vote_info->load_work); |
| 3807 | |
| 3808 | return vote_info; |
| 3809 | } |
| 3810 | |
| 3811 | /** |
| 3812 | * msm_ipc_unload_default_node() - Queue a vote to unload the modem. |
| 3813 | * |
| 3814 | * @pil_vote: PIL vote info structure, containing the PIL handle |
| 3815 | * and work structure. |
| 3816 | * |
| 3817 | * This function places a work item that unloads the modem on the |
| 3818 | * single-threaded workqueue used for processing PIL votes to load |
| 3819 | * or unload the modem. |
| 3820 | */ |
| 3821 | void msm_ipc_unload_default_node(void *pil_vote) |
| 3822 | { |
| 3823 | struct pil_vote_info *vote_info; |
| 3824 | |
| 3825 | if (pil_vote) { |
| 3826 | vote_info = (struct pil_vote_info *)pil_vote; |
| 3827 | INIT_WORK(&vote_info->unload_work, pil_vote_unload_worker); |
| 3828 | queue_work(msm_ipc_router_workqueue, &vote_info->unload_work); |
| 3829 | } |
| 3830 | } |
| 3831 | |
| 3832 | #if defined(CONFIG_DEBUG_FS) |
| 3833 | static void dump_routing_table(struct seq_file *s) |
| 3834 | { |
| 3835 | int j; |
| 3836 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3837 | |
| 3838 | seq_printf(s, "%-10s|%-20s|%-10s|\n", "Node Id", "XPRT Name", |
| 3839 | "Next Hop"); |
| 3840 | seq_puts(s, "----------------------------------------------\n"); |
| 3841 | for (j = 0; j < RT_HASH_SIZE; j++) { |
| 3842 | down_read(&routing_table_lock_lha3); |
| 3843 | list_for_each_entry(rt_entry, &routing_table[j], list) { |
| 3844 | down_read(&rt_entry->lock_lha4); |
| 3845 | seq_printf(s, "0x%08x|", rt_entry->node_id); |
| 3846 | if (rt_entry->node_id == IPC_ROUTER_NID_LOCAL) |
| 3847 | seq_printf(s, "%-20s|0x%08x|\n", "Loopback", |
| 3848 | rt_entry->node_id); |
| 3849 | else |
| 3850 | seq_printf(s, "%-20s|0x%08x|\n", |
| 3851 | rt_entry->xprt_info->xprt->name, |
| 3852 | rt_entry->node_id); |
| 3853 | up_read(&rt_entry->lock_lha4); |
| 3854 | } |
| 3855 | up_read(&routing_table_lock_lha3); |
| 3856 | } |
| 3857 | } |
| 3858 | |
| 3859 | static void dump_xprt_info(struct seq_file *s) |
| 3860 | { |
| 3861 | struct msm_ipc_router_xprt_info *xprt_info; |
| 3862 | |
| 3863 | seq_printf(s, "%-20s|%-10s|%-12s|%-15s|\n", "XPRT Name", "Link ID", |
| 3864 | "Initialized", "Remote Node Id"); |
| 3865 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3866 | down_read(&xprt_info_list_lock_lha5); |
| 3867 | list_for_each_entry(xprt_info, &xprt_info_list, list) |
| 3868 | seq_printf(s, "%-20s|0x%08x|%-12s|0x%08x|\n", |
| 3869 | xprt_info->xprt->name, xprt_info->xprt->link_id, |
| 3870 | (xprt_info->initialized ? "Y" : "N"), |
| 3871 | xprt_info->remote_node_id); |
| 3872 | up_read(&xprt_info_list_lock_lha5); |
| 3873 | } |
| 3874 | |
| 3875 | static void dump_servers(struct seq_file *s) |
| 3876 | { |
| 3877 | int j; |
| 3878 | struct msm_ipc_server *server; |
| 3879 | struct msm_ipc_server_port *server_port; |
| 3880 | |
| 3881 | seq_printf(s, "%-11s|%-11s|%-11s|%-11s|\n", "Service", "Instance", |
| 3882 | "Node_id", "Port_id"); |
| 3883 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3884 | down_read(&server_list_lock_lha2); |
| 3885 | for (j = 0; j < SRV_HASH_SIZE; j++) { |
| 3886 | list_for_each_entry(server, &server_list[j], list) { |
| 3887 | list_for_each_entry(server_port, |
| 3888 | &server->server_port_list, |
| 3889 | list) |
| 3890 | seq_printf(s, "0x%08x |0x%08x |0x%08x |0x%08x |\n", |
| 3891 | server->name.service, |
| 3892 | server->name.instance, |
| 3893 | server_port->server_addr.node_id, |
| 3894 | server_port->server_addr.port_id); |
| 3895 | } |
| 3896 | } |
| 3897 | up_read(&server_list_lock_lha2); |
| 3898 | } |
| 3899 | |
| 3900 | static void dump_remote_ports(struct seq_file *s) |
| 3901 | { |
| 3902 | int j, k; |
| 3903 | struct msm_ipc_router_remote_port *rport_ptr; |
| 3904 | struct msm_ipc_routing_table_entry *rt_entry; |
| 3905 | |
| 3906 | seq_printf(s, "%-11s|%-11s|%-10s|\n", "Node_id", "Port_id", |
| 3907 | "Quota_cnt"); |
| 3908 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3909 | for (j = 0; j < RT_HASH_SIZE; j++) { |
| 3910 | down_read(&routing_table_lock_lha3); |
| 3911 | list_for_each_entry(rt_entry, &routing_table[j], list) { |
| 3912 | down_read(&rt_entry->lock_lha4); |
| 3913 | for (k = 0; k < RP_HASH_SIZE; k++) { |
| 3914 | list_for_each_entry |
| 3915 | (rport_ptr, |
| 3916 | &rt_entry->remote_port_list[k], |
| 3917 | list) |
| 3918 | seq_printf(s, "0x%08x |0x%08x |0x%08x|\n", |
| 3919 | rport_ptr->node_id, |
| 3920 | rport_ptr->port_id, |
| 3921 | rport_ptr->tx_quota_cnt); |
| 3922 | } |
| 3923 | up_read(&rt_entry->lock_lha4); |
| 3924 | } |
| 3925 | up_read(&routing_table_lock_lha3); |
| 3926 | } |
| 3927 | } |
| 3928 | |
| 3929 | static void dump_control_ports(struct seq_file *s) |
| 3930 | { |
| 3931 | struct msm_ipc_port *port_ptr; |
| 3932 | |
| 3933 | seq_printf(s, "%-11s|%-11s|\n", "Node_id", "Port_id"); |
| 3934 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3935 | down_read(&control_ports_lock_lha5); |
| 3936 | list_for_each_entry(port_ptr, &control_ports, list) |
| 3937 | seq_printf(s, "0x%08x |0x%08x |\n", port_ptr->this_port.node_id, |
| 3938 | port_ptr->this_port.port_id); |
| 3939 | up_read(&control_ports_lock_lha5); |
| 3940 | } |
| 3941 | |
| 3942 | static void dump_local_ports(struct seq_file *s) |
| 3943 | { |
| 3944 | int j; |
| 3945 | struct msm_ipc_port *port_ptr; |
| 3946 | |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame] | 3947 | seq_printf(s, "%-11s|%-11s|%-32s|%-11s|\n", |
| 3948 | "Node_id", "Port_id", "Wakelock", "Last SVCID"); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3949 | seq_puts(s, "------------------------------------------------------------\n"); |
| 3950 | down_read(&local_ports_lock_lhc2); |
| 3951 | for (j = 0; j < LP_HASH_SIZE; j++) { |
| 3952 | list_for_each_entry(port_ptr, &local_ports[j], list) { |
| 3953 | mutex_lock(&port_ptr->port_lock_lhc3); |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame] | 3954 | seq_printf(s, "0x%08x |0x%08x |%-32s|0x%08x |\n", |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3955 | port_ptr->this_port.node_id, |
Dhoat Harpal | 3ad5fe3 | 2017-06-19 21:26:13 +0530 | [diff] [blame] | 3956 | port_ptr->this_port.port_id, |
| 3957 | port_ptr->rx_ws_name, |
| 3958 | port_ptr->last_served_svc_id); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 3959 | mutex_unlock(&port_ptr->port_lock_lhc3); |
| 3960 | } |
| 3961 | } |
| 3962 | up_read(&local_ports_lock_lhc2); |
| 3963 | } |
| 3964 | |
| 3965 | static int debugfs_show(struct seq_file *s, void *data) |
| 3966 | { |
| 3967 | void (*show)(struct seq_file *) = s->private; |
| 3968 | |
| 3969 | show(s); |
| 3970 | return 0; |
| 3971 | } |
| 3972 | |
| 3973 | static int debug_open(struct inode *inode, struct file *file) |
| 3974 | { |
| 3975 | return single_open(file, debugfs_show, inode->i_private); |
| 3976 | } |
| 3977 | |
| 3978 | static const struct file_operations debug_ops = { |
| 3979 | .open = debug_open, |
| 3980 | .release = single_release, |
| 3981 | .read = seq_read, |
| 3982 | .llseek = seq_lseek, |
| 3983 | }; |
| 3984 | |
| 3985 | static void debug_create(const char *name, struct dentry *dent, |
| 3986 | void (*show)(struct seq_file *)) |
| 3987 | { |
| 3988 | debugfs_create_file(name, 0444, dent, show, &debug_ops); |
| 3989 | } |
| 3990 | |
| 3991 | static void debugfs_init(void) |
| 3992 | { |
| 3993 | struct dentry *dent; |
| 3994 | |
| 3995 | dent = debugfs_create_dir("msm_ipc_router", 0); |
| 3996 | if (IS_ERR(dent)) |
| 3997 | return; |
| 3998 | |
| 3999 | debug_create("dump_local_ports", dent, dump_local_ports); |
| 4000 | debug_create("dump_remote_ports", dent, dump_remote_ports); |
| 4001 | debug_create("dump_control_ports", dent, dump_control_ports); |
| 4002 | debug_create("dump_servers", dent, dump_servers); |
| 4003 | debug_create("dump_xprt_info", dent, dump_xprt_info); |
| 4004 | debug_create("dump_routing_table", dent, dump_routing_table); |
| 4005 | } |
| 4006 | |
| 4007 | #else |
| 4008 | static void debugfs_init(void) {} |
| 4009 | #endif |
| 4010 | |
| 4011 | /** |
| 4012 | * ipc_router_create_log_ctx() - Create and add the log context based on |
| 4013 | * transport |
| 4014 | * @name: subsystem name |
| 4015 | * |
| 4016 | * Return: a reference to the log context created |
| 4017 | * |
| 4018 | * This function creates ipc log context based on transport and adds it to a |
| 4019 | * global list. This log context can be reused from the list in case of a |
| 4020 | * subsystem restart. |
| 4021 | */ |
| 4022 | static void *ipc_router_create_log_ctx(char *name) |
| 4023 | { |
| 4024 | struct ipc_rtr_log_ctx *sub_log_ctx; |
| 4025 | |
| 4026 | sub_log_ctx = kmalloc(sizeof(*sub_log_ctx), GFP_KERNEL); |
| 4027 | if (!sub_log_ctx) |
| 4028 | return NULL; |
| 4029 | sub_log_ctx->log_ctx = ipc_log_context_create( |
| 4030 | IPC_RTR_INFO_PAGES, name, 0); |
| 4031 | if (!sub_log_ctx->log_ctx) { |
| 4032 | IPC_RTR_ERR("%s: Unable to create IPC logging for [%s]", |
| 4033 | __func__, name); |
| 4034 | kfree(sub_log_ctx); |
| 4035 | return NULL; |
| 4036 | } |
| 4037 | strlcpy(sub_log_ctx->log_ctx_name, name, LOG_CTX_NAME_LEN); |
| 4038 | INIT_LIST_HEAD(&sub_log_ctx->list); |
| 4039 | list_add_tail(&sub_log_ctx->list, &log_ctx_list); |
| 4040 | return sub_log_ctx->log_ctx; |
| 4041 | } |
| 4042 | |
| 4043 | static void ipc_router_log_ctx_init(void) |
| 4044 | { |
| 4045 | mutex_lock(&log_ctx_list_lock_lha0); |
| 4046 | local_log_ctx = ipc_router_create_log_ctx("local_IPCRTR"); |
| 4047 | mutex_unlock(&log_ctx_list_lock_lha0); |
| 4048 | } |
| 4049 | |
| 4050 | /** |
| 4051 | * ipc_router_get_log_ctx() - Retrieves the ipc log context based on subsystem |
| 4052 | * name. |
| 4053 | * @sub_name: subsystem name |
| 4054 | * |
| 4055 | * Return: a reference to the log context |
| 4056 | */ |
| 4057 | static void *ipc_router_get_log_ctx(char *sub_name) |
| 4058 | { |
| 4059 | void *log_ctx = NULL; |
| 4060 | struct ipc_rtr_log_ctx *temp_log_ctx; |
| 4061 | |
| 4062 | mutex_lock(&log_ctx_list_lock_lha0); |
| 4063 | list_for_each_entry(temp_log_ctx, &log_ctx_list, list) |
| 4064 | if (!strcmp(temp_log_ctx->log_ctx_name, sub_name)) { |
| 4065 | log_ctx = temp_log_ctx->log_ctx; |
| 4066 | mutex_unlock(&log_ctx_list_lock_lha0); |
| 4067 | return log_ctx; |
| 4068 | } |
| 4069 | log_ctx = ipc_router_create_log_ctx(sub_name); |
| 4070 | mutex_unlock(&log_ctx_list_lock_lha0); |
| 4071 | |
| 4072 | return log_ctx; |
| 4073 | } |
| 4074 | |
| 4075 | /** |
| 4076 | * ipc_router_get_xprt_info_ref() - Get a reference to the xprt_info structure |
| 4077 | * @xprt_info: pointer to the xprt_info. |
| 4078 | * |
| 4079 | * @return: Zero on success, -ENODEV on failure. |
| 4080 | * |
| 4081 | * This function is used to obtain a reference to the xprt_info structure |
| 4082 | * corresponding to the requested @xprt_info pointer. |
| 4083 | */ |
| 4084 | static int ipc_router_get_xprt_info_ref( |
| 4085 | struct msm_ipc_router_xprt_info *xprt_info) |
| 4086 | { |
| 4087 | int ret = -ENODEV; |
| 4088 | struct msm_ipc_router_xprt_info *tmp_xprt_info; |
| 4089 | |
| 4090 | if (!xprt_info) |
| 4091 | return 0; |
| 4092 | |
| 4093 | down_read(&xprt_info_list_lock_lha5); |
| 4094 | list_for_each_entry(tmp_xprt_info, &xprt_info_list, list) { |
| 4095 | if (tmp_xprt_info == xprt_info) { |
| 4096 | kref_get(&xprt_info->ref); |
| 4097 | ret = 0; |
| 4098 | break; |
| 4099 | } |
| 4100 | } |
| 4101 | up_read(&xprt_info_list_lock_lha5); |
| 4102 | |
| 4103 | return ret; |
| 4104 | } |
| 4105 | |
| 4106 | /** |
| 4107 | * ipc_router_put_xprt_info_ref() - Put a reference to the xprt_info structure |
| 4108 | * @xprt_info: pointer to the xprt_info. |
| 4109 | * |
| 4110 | * This function is used to put the reference to the xprt_info structure |
| 4111 | * corresponding to the requested @xprt_info pointer. |
| 4112 | */ |
| 4113 | static void ipc_router_put_xprt_info_ref( |
| 4114 | struct msm_ipc_router_xprt_info *xprt_info) |
| 4115 | { |
| 4116 | if (xprt_info) |
| 4117 | kref_put(&xprt_info->ref, ipc_router_release_xprt_info_ref); |
| 4118 | } |
| 4119 | |
| 4120 | /** |
| 4121 | * ipc_router_release_xprt_info_ref() - release the xprt_info last reference |
| 4122 | * @ref: Reference to the xprt_info structure. |
| 4123 | * |
| 4124 | * This function is called when all references to the xprt_info structure |
| 4125 | * are released. |
| 4126 | */ |
| 4127 | static void ipc_router_release_xprt_info_ref(struct kref *ref) |
| 4128 | { |
| 4129 | struct msm_ipc_router_xprt_info *xprt_info = |
| 4130 | container_of(ref, struct msm_ipc_router_xprt_info, ref); |
| 4131 | |
| 4132 | complete_all(&xprt_info->ref_complete); |
| 4133 | } |
| 4134 | |
| 4135 | static int msm_ipc_router_add_xprt(struct msm_ipc_router_xprt *xprt) |
| 4136 | { |
| 4137 | struct msm_ipc_router_xprt_info *xprt_info; |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 4138 | struct sched_param param = {.sched_priority = 1}; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4139 | |
| 4140 | xprt_info = kmalloc(sizeof(*xprt_info), GFP_KERNEL); |
| 4141 | if (!xprt_info) |
| 4142 | return -ENOMEM; |
| 4143 | |
| 4144 | xprt_info->xprt = xprt; |
| 4145 | xprt_info->initialized = 0; |
Arun Kumar Neelakantam | f99191d | 2018-06-11 18:13:43 +0530 | [diff] [blame] | 4146 | xprt_info->hello_sent = 0; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4147 | xprt_info->remote_node_id = -1; |
| 4148 | INIT_LIST_HEAD(&xprt_info->pkt_list); |
| 4149 | mutex_init(&xprt_info->rx_lock_lhb2); |
| 4150 | mutex_init(&xprt_info->tx_lock_lhb2); |
| 4151 | wakeup_source_init(&xprt_info->ws, xprt->name); |
| 4152 | xprt_info->need_len = 0; |
| 4153 | xprt_info->abort_data_read = 0; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4154 | INIT_LIST_HEAD(&xprt_info->list); |
| 4155 | kref_init(&xprt_info->ref); |
| 4156 | init_completion(&xprt_info->ref_complete); |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4157 | xprt_info->dynamic_ws = 0; |
| 4158 | if (xprt->get_ws_info) |
| 4159 | xprt_info->dynamic_ws = xprt->get_ws_info(xprt); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4160 | |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 4161 | kthread_init_work(&xprt_info->read_data, do_read_data); |
| 4162 | kthread_init_worker(&xprt_info->kworker); |
| 4163 | xprt_info->task = kthread_run(kthread_worker_fn, |
| 4164 | &xprt_info->kworker, |
| 4165 | "%s", xprt->name); |
| 4166 | if (IS_ERR(xprt_info->task)) { |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4167 | kfree(xprt_info); |
| 4168 | return -ENOMEM; |
| 4169 | } |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 4170 | if (xprt->get_latency_info && xprt->get_latency_info(xprt)) |
| 4171 | sched_setscheduler(xprt_info->task, SCHED_FIFO, ¶m); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4172 | |
| 4173 | xprt_info->log_ctx = ipc_router_get_log_ctx(xprt->name); |
| 4174 | |
| 4175 | if (!strcmp(xprt->name, "msm_ipc_router_loopback_xprt")) { |
| 4176 | xprt_info->remote_node_id = IPC_ROUTER_NID_LOCAL; |
| 4177 | xprt_info->initialized = 1; |
| 4178 | } |
| 4179 | |
| 4180 | IPC_RTR_INFO(xprt_info->log_ctx, "Adding xprt: [%s]\n", xprt->name); |
| 4181 | down_write(&xprt_info_list_lock_lha5); |
| 4182 | list_add_tail(&xprt_info->list, &xprt_info_list); |
| 4183 | up_write(&xprt_info_list_lock_lha5); |
| 4184 | |
| 4185 | down_write(&routing_table_lock_lha3); |
| 4186 | if (!routing_table_inited) { |
| 4187 | init_routing_table(); |
| 4188 | routing_table_inited = 1; |
| 4189 | } |
| 4190 | up_write(&routing_table_lock_lha3); |
| 4191 | |
| 4192 | xprt->priv = xprt_info; |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 4193 | complete_all(&xprt->xprt_init_complete); |
Arun Prakash | 95e5053 | 2020-07-08 13:11:00 +0530 | [diff] [blame] | 4194 | send_hello_msg(xprt_info); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4195 | |
| 4196 | return 0; |
| 4197 | } |
| 4198 | |
| 4199 | static void msm_ipc_router_remove_xprt(struct msm_ipc_router_xprt *xprt) |
| 4200 | { |
| 4201 | struct msm_ipc_router_xprt_info *xprt_info; |
| 4202 | struct rr_packet *temp_pkt, *pkt; |
| 4203 | |
| 4204 | if (xprt && xprt->priv) { |
| 4205 | xprt_info = xprt->priv; |
| 4206 | |
| 4207 | IPC_RTR_INFO(xprt_info->log_ctx, "Removing xprt: [%s]\n", |
| 4208 | xprt->name); |
| 4209 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 4210 | xprt_info->abort_data_read = 1; |
| 4211 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 4212 | kthread_flush_worker(&xprt_info->kworker); |
| 4213 | kthread_stop(xprt_info->task); |
| 4214 | xprt_info->task = NULL; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4215 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 4216 | list_for_each_entry_safe(pkt, temp_pkt, |
| 4217 | &xprt_info->pkt_list, list) { |
| 4218 | list_del(&pkt->list); |
| 4219 | release_pkt(pkt); |
| 4220 | } |
| 4221 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
| 4222 | |
| 4223 | down_write(&xprt_info_list_lock_lha5); |
| 4224 | list_del(&xprt_info->list); |
| 4225 | up_write(&xprt_info_list_lock_lha5); |
| 4226 | |
| 4227 | msm_ipc_cleanup_routing_table(xprt_info); |
| 4228 | |
| 4229 | wakeup_source_trash(&xprt_info->ws); |
| 4230 | |
| 4231 | ipc_router_put_xprt_info_ref(xprt_info); |
| 4232 | wait_for_completion(&xprt_info->ref_complete); |
| 4233 | |
| 4234 | xprt->priv = 0; |
| 4235 | kfree(xprt_info); |
| 4236 | } |
| 4237 | } |
| 4238 | |
| 4239 | struct msm_ipc_router_xprt_work { |
| 4240 | struct msm_ipc_router_xprt *xprt; |
| 4241 | struct work_struct work; |
| 4242 | }; |
| 4243 | |
| 4244 | static void xprt_open_worker(struct work_struct *work) |
| 4245 | { |
| 4246 | struct msm_ipc_router_xprt_work *xprt_work = |
| 4247 | container_of(work, struct msm_ipc_router_xprt_work, work); |
| 4248 | |
| 4249 | msm_ipc_router_add_xprt(xprt_work->xprt); |
| 4250 | kfree(xprt_work); |
| 4251 | } |
| 4252 | |
| 4253 | static void xprt_close_worker(struct work_struct *work) |
| 4254 | { |
| 4255 | struct msm_ipc_router_xprt_work *xprt_work = |
| 4256 | container_of(work, struct msm_ipc_router_xprt_work, work); |
| 4257 | |
| 4258 | msm_ipc_router_remove_xprt(xprt_work->xprt); |
| 4259 | xprt_work->xprt->sft_close_done(xprt_work->xprt); |
| 4260 | kfree(xprt_work); |
| 4261 | } |
| 4262 | |
| 4263 | void msm_ipc_router_xprt_notify(struct msm_ipc_router_xprt *xprt, |
| 4264 | unsigned int event, |
| 4265 | void *data) |
| 4266 | { |
| 4267 | struct msm_ipc_router_xprt_info *xprt_info = xprt->priv; |
| 4268 | struct msm_ipc_router_xprt_work *xprt_work; |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 4269 | struct msm_ipc_router_remote_port *rport_ptr = NULL; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4270 | struct rr_packet *pkt; |
| 4271 | int ret; |
| 4272 | |
| 4273 | ret = ipc_router_core_init(); |
| 4274 | if (ret < 0) { |
| 4275 | IPC_RTR_ERR("%s: Error %d initializing IPC Router\n", |
| 4276 | __func__, ret); |
| 4277 | return; |
| 4278 | } |
| 4279 | |
| 4280 | switch (event) { |
| 4281 | case IPC_ROUTER_XPRT_EVENT_OPEN: |
| 4282 | xprt_work = kmalloc(sizeof(*xprt_work), GFP_ATOMIC); |
| 4283 | if (xprt_work) { |
| 4284 | xprt_work->xprt = xprt; |
| 4285 | INIT_WORK(&xprt_work->work, xprt_open_worker); |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 4286 | init_completion(&xprt->xprt_init_complete); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4287 | queue_work(msm_ipc_router_workqueue, &xprt_work->work); |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 4288 | wait_for_completion(&xprt->xprt_init_complete); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4289 | } else { |
| 4290 | IPC_RTR_ERR( |
| 4291 | "%s: malloc failure - Couldn't notify OPEN event", |
| 4292 | __func__); |
| 4293 | } |
| 4294 | break; |
| 4295 | |
| 4296 | case IPC_ROUTER_XPRT_EVENT_CLOSE: |
| 4297 | xprt_work = kmalloc(sizeof(*xprt_work), GFP_ATOMIC); |
| 4298 | if (xprt_work) { |
| 4299 | xprt_work->xprt = xprt; |
| 4300 | INIT_WORK(&xprt_work->work, xprt_close_worker); |
| 4301 | queue_work(msm_ipc_router_workqueue, &xprt_work->work); |
| 4302 | } else { |
| 4303 | IPC_RTR_ERR( |
| 4304 | "%s: malloc failure - Couldn't notify CLOSE event", |
| 4305 | __func__); |
| 4306 | } |
| 4307 | break; |
| 4308 | } |
| 4309 | |
| 4310 | if (!data) |
| 4311 | return; |
| 4312 | |
| 4313 | while (!xprt_info) { |
| 4314 | msleep(100); |
| 4315 | xprt_info = xprt->priv; |
| 4316 | } |
| 4317 | |
| 4318 | pkt = clone_pkt((struct rr_packet *)data); |
| 4319 | if (!pkt) |
| 4320 | return; |
| 4321 | |
Arun Prakash | 60aa177 | 2020-06-12 18:49:33 +0530 | [diff] [blame] | 4322 | if (pkt->length < calc_rx_header_size(xprt_info, pkt) || |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 4323 | pkt->length > MAX_IPC_PKT_SIZE) { |
| 4324 | IPC_RTR_ERR("%s: Invalid pkt length %d\n", |
| 4325 | __func__, pkt->length); |
| 4326 | release_pkt(pkt); |
| 4327 | return; |
| 4328 | } |
| 4329 | |
| 4330 | ret = extract_header(pkt); |
| 4331 | if (ret < 0) { |
| 4332 | release_pkt(pkt); |
| 4333 | return; |
| 4334 | } |
| 4335 | |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4336 | pkt->ws_need = false; |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 4337 | |
| 4338 | if (pkt->hdr.type == IPC_ROUTER_CTRL_CMD_DATA) |
| 4339 | rport_ptr = ipc_router_get_rport_ref(pkt->hdr.src_node_id, |
| 4340 | pkt->hdr.src_port_id); |
| 4341 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4342 | mutex_lock(&xprt_info->rx_lock_lhb2); |
| 4343 | list_add_tail(&pkt->list, &xprt_info->pkt_list); |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 4344 | /* check every pkt is from SENSOR services or not and |
| 4345 | * avoid holding both edge and port specific wake-up sources |
| 4346 | */ |
| 4347 | if (!is_sensor_port(rport_ptr)) { |
| 4348 | if (!xprt_info->dynamic_ws) { |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4349 | __pm_stay_awake(&xprt_info->ws); |
| 4350 | pkt->ws_need = true; |
Arun Kumar Neelakantam | 029e846 | 2018-04-19 18:10:47 +0530 | [diff] [blame] | 4351 | } else { |
| 4352 | if (is_wakeup_source_allowed) { |
| 4353 | __pm_stay_awake(&xprt_info->ws); |
| 4354 | pkt->ws_need = true; |
| 4355 | } |
Arun Kumar Neelakantam | 74ff856 | 2017-05-26 17:57:52 +0530 | [diff] [blame] | 4356 | } |
| 4357 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4358 | mutex_unlock(&xprt_info->rx_lock_lhb2); |
Deepak Kumar Singh | 77d41ac | 2018-09-19 17:15:17 +0530 | [diff] [blame] | 4359 | if (rport_ptr) |
| 4360 | kref_put(&rport_ptr->ref, ipc_router_release_rport); |
Arun Kumar Neelakantam | d5eb273 | 2018-06-19 14:40:01 +0530 | [diff] [blame] | 4361 | kthread_queue_work(&xprt_info->kworker, &xprt_info->read_data); |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 4362 | } |
| 4363 | |
| 4364 | /** |
| 4365 | * parse_devicetree() - parse device tree binding |
| 4366 | * |
| 4367 | * @node: pointer to device tree node |
| 4368 | * |
| 4369 | * @return: 0 on success, -ENODEV on failure. |
| 4370 | */ |
| 4371 | static int parse_devicetree(struct device_node *node) |
| 4372 | { |
| 4373 | char *key; |
| 4374 | const char *peripheral = NULL; |
| 4375 | |
| 4376 | key = "qcom,default-peripheral"; |
| 4377 | peripheral = of_get_property(node, key, NULL); |
| 4378 | if (peripheral) |
| 4379 | strlcpy(default_peripheral, peripheral, PIL_SUBSYSTEM_NAME_LEN); |
| 4380 | |
| 4381 | return 0; |
| 4382 | } |
| 4383 | |
| 4384 | /** |
| 4385 | * ipc_router_probe() - Probe the IPC Router |
| 4386 | * |
| 4387 | * @pdev: Platform device corresponding to IPC Router. |
| 4388 | * |
| 4389 | * @return: 0 on success, standard Linux error codes on error. |
| 4390 | * |
| 4391 | * This function is called when the underlying device tree driver registers |
| 4392 | * a platform device, mapped to IPC Router. |
| 4393 | */ |
| 4394 | static int ipc_router_probe(struct platform_device *pdev) |
| 4395 | { |
| 4396 | int ret = 0; |
| 4397 | |
| 4398 | if (pdev && pdev->dev.of_node) { |
| 4399 | ret = parse_devicetree(pdev->dev.of_node); |
| 4400 | if (ret) |
| 4401 | IPC_RTR_ERR("%s: Failed to parse device tree\n", |
| 4402 | __func__); |
| 4403 | } |
| 4404 | return ret; |
| 4405 | } |
| 4406 | |
| 4407 | static const struct of_device_id ipc_router_match_table[] = { |
| 4408 | { .compatible = "qcom,ipc_router" }, |
| 4409 | {}, |
| 4410 | }; |
| 4411 | |
| 4412 | static struct platform_driver ipc_router_driver = { |
| 4413 | .probe = ipc_router_probe, |
| 4414 | .driver = { |
| 4415 | .name = MODULE_NAME, |
| 4416 | .owner = THIS_MODULE, |
| 4417 | .of_match_table = ipc_router_match_table, |
| 4418 | }, |
| 4419 | }; |
| 4420 | |
| 4421 | /** |
| 4422 | * ipc_router_core_init() - Initialize all IPC Router core data structures |
| 4423 | * |
| 4424 | * Return: 0 on Success or Standard error code otherwise. |
| 4425 | * |
| 4426 | * This function only initializes all the core data structures to the IPC Router |
| 4427 | * module. The remaining initialization is done inside msm_ipc_router_init(). |
| 4428 | */ |
| 4429 | static int ipc_router_core_init(void) |
| 4430 | { |
| 4431 | int i; |
| 4432 | int ret; |
| 4433 | struct msm_ipc_routing_table_entry *rt_entry; |
| 4434 | |
| 4435 | mutex_lock(&ipc_router_init_lock); |
| 4436 | if (likely(is_ipc_router_inited)) { |
| 4437 | mutex_unlock(&ipc_router_init_lock); |
| 4438 | return 0; |
| 4439 | } |
| 4440 | |
| 4441 | debugfs_init(); |
| 4442 | |
| 4443 | for (i = 0; i < SRV_HASH_SIZE; i++) |
| 4444 | INIT_LIST_HEAD(&server_list[i]); |
| 4445 | |
| 4446 | for (i = 0; i < LP_HASH_SIZE; i++) |
| 4447 | INIT_LIST_HEAD(&local_ports[i]); |
| 4448 | |
| 4449 | down_write(&routing_table_lock_lha3); |
| 4450 | if (!routing_table_inited) { |
| 4451 | init_routing_table(); |
| 4452 | routing_table_inited = 1; |
| 4453 | } |
| 4454 | up_write(&routing_table_lock_lha3); |
| 4455 | rt_entry = create_routing_table_entry(IPC_ROUTER_NID_LOCAL, NULL); |
| 4456 | kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| 4457 | |
| 4458 | msm_ipc_router_workqueue = |
| 4459 | create_singlethread_workqueue("msm_ipc_router"); |
| 4460 | if (!msm_ipc_router_workqueue) { |
| 4461 | mutex_unlock(&ipc_router_init_lock); |
| 4462 | return -ENOMEM; |
| 4463 | } |
| 4464 | |
| 4465 | ret = msm_ipc_router_security_init(); |
| 4466 | if (ret < 0) |
| 4467 | IPC_RTR_ERR("%s: Security Init failed\n", __func__); |
| 4468 | else |
| 4469 | is_ipc_router_inited = true; |
| 4470 | mutex_unlock(&ipc_router_init_lock); |
| 4471 | |
| 4472 | return ret; |
| 4473 | } |
| 4474 | |
| 4475 | static int msm_ipc_router_init(void) |
| 4476 | { |
| 4477 | int ret; |
| 4478 | |
| 4479 | ret = ipc_router_core_init(); |
| 4480 | if (ret < 0) |
| 4481 | return ret; |
| 4482 | |
| 4483 | ret = platform_driver_register(&ipc_router_driver); |
| 4484 | if (ret) |
| 4485 | IPC_RTR_ERR( |
| 4486 | "%s: ipc_router_driver register failed %d\n", __func__, ret); |
| 4487 | |
| 4488 | ret = msm_ipc_router_init_sockets(); |
| 4489 | if (ret < 0) |
| 4490 | IPC_RTR_ERR("%s: Init sockets failed\n", __func__); |
| 4491 | |
| 4492 | ipc_router_log_ctx_init(); |
| 4493 | return ret; |
| 4494 | } |
| 4495 | |
| 4496 | module_init(msm_ipc_router_init); |
| 4497 | MODULE_DESCRIPTION("MSM IPC Router"); |
| 4498 | MODULE_LICENSE("GPL v2"); |