| /* Copyright (c) 2011-2020, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/sched.h> |
| #include <linux/poll.h> |
| #include <linux/pm.h> |
| #include <linux/platform_device.h> |
| #include <linux/uaccess.h> |
| #include <linux/debugfs.h> |
| #include <linux/rwsem.h> |
| #include <linux/ipc_logging.h> |
| #include <linux/uaccess.h> |
| #include <linux/ipc_router.h> |
| #include <linux/ipc_router_xprt.h> |
| #include <linux/kref.h> |
| #include <linux/kthread.h> |
| #include <soc/qcom/subsystem_notif.h> |
| #include <soc/qcom/subsystem_restart.h> |
| |
| #include <asm/byteorder.h> |
| |
| #include "ipc_router_private.h" |
| #include "ipc_router_security.h" |
| |
| enum { |
| SMEM_LOG = 1U << 0, |
| RTR_DBG = 1U << 1, |
| }; |
| |
| static int msm_ipc_router_debug_mask; |
| module_param_named(debug_mask, msm_ipc_router_debug_mask, |
| int, 0664); |
| #define MODULE_NAME "ipc_router" |
| |
| #define IPC_RTR_INFO_PAGES 6 |
| |
| #define IPC_RTR_INFO(log_ctx, x...) do { \ |
| typeof(log_ctx) _log_ctx = (log_ctx); \ |
| if (_log_ctx) \ |
| ipc_log_string(_log_ctx, x); \ |
| if (msm_ipc_router_debug_mask & RTR_DBG) \ |
| pr_info("[IPCRTR] "x); \ |
| } while (0) |
| |
| #define IPC_ROUTER_LOG_EVENT_TX 0x01 |
| #define IPC_ROUTER_LOG_EVENT_RX 0x02 |
| #define IPC_ROUTER_LOG_EVENT_TX_ERR 0x03 |
| #define IPC_ROUTER_LOG_EVENT_RX_ERR 0x04 |
| #define IPC_ROUTER_DUMMY_DEST_NODE 0xFFFFFFFF |
| |
| #define ipc_port_sk(port) ((struct sock *)(port)) |
| |
| static LIST_HEAD(control_ports); |
| static DECLARE_RWSEM(control_ports_lock_lha5); |
| |
| #define LP_HASH_SIZE 32 |
| static struct list_head local_ports[LP_HASH_SIZE]; |
| static DECLARE_RWSEM(local_ports_lock_lhc2); |
| |
| /* Server info is organized as a hash table. The server's service ID is |
| * used to index into the hash table. The instance ID of most of the servers |
| * are 1 or 2. The service IDs are well distributed compared to the instance |
| * IDs and hence choosing service ID to index into this hash table optimizes |
| * the hash table operations like add, lookup, destroy. |
| */ |
| #define SRV_HASH_SIZE 32 |
| static struct list_head server_list[SRV_HASH_SIZE]; |
| static DECLARE_RWSEM(server_list_lock_lha2); |
| |
| struct msm_ipc_server { |
| struct list_head list; |
| struct kref ref; |
| struct msm_ipc_port_name name; |
| char pdev_name[32]; |
| int next_pdev_id; |
| int synced_sec_rule; |
| struct list_head server_port_list; |
| }; |
| |
| struct msm_ipc_server_port { |
| struct list_head list; |
| struct platform_device *pdev; |
| struct msm_ipc_port_addr server_addr; |
| struct msm_ipc_router_xprt_info *xprt_info; |
| }; |
| |
| struct msm_ipc_resume_tx_port { |
| struct list_head list; |
| u32 port_id; |
| u32 node_id; |
| }; |
| |
| struct ipc_router_conn_info { |
| struct list_head list; |
| u32 port_id; |
| }; |
| |
| enum { |
| RESET = 0, |
| VALID = 1, |
| }; |
| |
| #define RP_HASH_SIZE 32 |
| struct msm_ipc_router_remote_port { |
| struct list_head list; |
| struct kref ref; |
| struct mutex rport_lock_lhb2; /* lock for remote port state access */ |
| u32 node_id; |
| u32 port_id; |
| int status; |
| u32 tx_quota_cnt; |
| struct list_head resume_tx_port_list; |
| struct list_head conn_info_list; |
| void *sec_rule; |
| struct msm_ipc_server *server; |
| }; |
| |
| struct msm_ipc_router_xprt_info { |
| struct list_head list; |
| struct msm_ipc_router_xprt *xprt; |
| u32 remote_node_id; |
| u32 initialized; |
| u32 hello_sent; |
| struct list_head pkt_list; |
| struct wakeup_source ws; |
| struct mutex rx_lock_lhb2; /* lock for xprt rx operations */ |
| struct mutex tx_lock_lhb2; /* lock for xprt tx operations */ |
| u32 need_len; |
| u32 abort_data_read; |
| void *log_ctx; |
| struct kref ref; |
| struct completion ref_complete; |
| bool dynamic_ws; |
| |
| struct kthread_worker kworker; |
| struct task_struct *task; |
| struct kthread_work read_data; |
| }; |
| |
| #define RT_HASH_SIZE 4 |
| struct msm_ipc_routing_table_entry { |
| struct list_head list; |
| struct kref ref; |
| u32 node_id; |
| u32 neighbor_node_id; |
| struct list_head remote_port_list[RP_HASH_SIZE]; |
| struct msm_ipc_router_xprt_info *xprt_info; |
| struct rw_semaphore lock_lha4; |
| unsigned long num_tx_bytes; |
| unsigned long num_rx_bytes; |
| }; |
| |
| #define LOG_CTX_NAME_LEN 32 |
| struct ipc_rtr_log_ctx { |
| struct list_head list; |
| char log_ctx_name[LOG_CTX_NAME_LEN]; |
| void *log_ctx; |
| }; |
| |
| static struct list_head routing_table[RT_HASH_SIZE]; |
| static DECLARE_RWSEM(routing_table_lock_lha3); |
| static int routing_table_inited; |
| |
| static void do_read_data(struct kthread_work *work); |
| |
| static LIST_HEAD(xprt_info_list); |
| static DECLARE_RWSEM(xprt_info_list_lock_lha5); |
| |
| static DEFINE_MUTEX(log_ctx_list_lock_lha0); |
| static LIST_HEAD(log_ctx_list); |
| static DEFINE_MUTEX(ipc_router_init_lock); |
| static bool is_ipc_router_inited; |
| static int ipc_router_core_init(void); |
| #define IPC_ROUTER_INIT_TIMEOUT (10 * HZ) |
| |
| static u32 next_port_id; |
| static DEFINE_MUTEX(next_port_id_lock_lhc1); |
| static struct workqueue_struct *msm_ipc_router_workqueue; |
| |
| static void *local_log_ctx; |
| static void *ipc_router_get_log_ctx(char *sub_name); |
| static int process_resume_tx_msg(union rr_control_msg *msg, |
| struct rr_packet *pkt); |
| static void ipc_router_reset_conn(struct msm_ipc_router_remote_port *rport_ptr); |
| static int ipc_router_get_xprt_info_ref( |
| struct msm_ipc_router_xprt_info *xprt_info); |
| static void ipc_router_put_xprt_info_ref( |
| struct msm_ipc_router_xprt_info *xprt_info); |
| static void ipc_router_release_xprt_info_ref(struct kref *ref); |
| |
| struct pil_vote_info { |
| void *pil_handle; |
| struct work_struct load_work; |
| struct work_struct unload_work; |
| }; |
| |
| #define PIL_SUBSYSTEM_NAME_LEN 32 |
| static char default_peripheral[PIL_SUBSYSTEM_NAME_LEN]; |
| |
| enum { |
| DOWN, |
| UP, |
| }; |
| |
| static bool is_wakeup_source_allowed; |
| |
| void msm_ipc_router_set_ws_allowed(bool flag) |
| { |
| is_wakeup_source_allowed = flag; |
| } |
| |
| /** |
| * is_sensor_port() - Check if the remote port is sensor service or not |
| * @rport: Pointer to the remote port. |
| * |
| * Return: true if the remote port is sensor service else false. |
| */ |
| static int is_sensor_port(struct msm_ipc_router_remote_port *rport) |
| { |
| u32 svcid = 0; |
| |
| if (rport && rport->server) { |
| svcid = rport->server->name.service; |
| if (svcid == 400 || (svcid >= 256 && svcid <= 320)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static void init_routing_table(void) |
| { |
| int i; |
| |
| for (i = 0; i < RT_HASH_SIZE; i++) |
| INIT_LIST_HEAD(&routing_table[i]); |
| } |
| |
| /** |
| * ipc_router_calc_checksum() - compute the checksum for extended HELLO message |
| * @msg: Reference to the IPC Router HELLO message. |
| * |
| * Return: Computed checksum value, 0 if msg is NULL. |
| */ |
| static u32 ipc_router_calc_checksum(union rr_control_msg *msg) |
| { |
| u32 checksum = 0; |
| int i, len; |
| u16 upper_nb; |
| u16 lower_nb; |
| void *hello; |
| |
| if (!msg) |
| return checksum; |
| hello = msg; |
| len = sizeof(*msg); |
| |
| for (i = 0; i < len / IPCR_WORD_SIZE; i++) { |
| lower_nb = (*((u32 *)hello)) & IPC_ROUTER_CHECKSUM_MASK; |
| upper_nb = ((*((u32 *)hello)) >> 16) & |
| IPC_ROUTER_CHECKSUM_MASK; |
| checksum = checksum + upper_nb + lower_nb; |
| hello = ((u32 *)hello) + 1; |
| } |
| while (checksum > 0xFFFF) |
| checksum = (checksum & IPC_ROUTER_CHECKSUM_MASK) + |
| ((checksum >> 16) & IPC_ROUTER_CHECKSUM_MASK); |
| |
| checksum = ~checksum & IPC_ROUTER_CHECKSUM_MASK; |
| return checksum; |
| } |
| |
| /** |
| * skb_copy_to_log_buf() - copies the required number bytes from the skb_queue |
| * @skb_head: skb_queue head that contains the data. |
| * @pl_len: length of payload need to be copied. |
| * @hdr_offset: length of the header present in first skb |
| * @log_buf: The output buffer which will contain the formatted log string |
| * |
| * This function copies the first specified number of bytes from the skb_queue |
| * to a new buffer and formats them to a string for logging. |
| */ |
| static void skb_copy_to_log_buf(struct sk_buff_head *skb_head, |
| unsigned int pl_len, unsigned int hdr_offset, |
| unsigned char *log_buf) |
| { |
| struct sk_buff *temp_skb; |
| unsigned int copied_len = 0, copy_len = 0; |
| int remaining; |
| |
| if (!skb_head) { |
| IPC_RTR_ERR("%s: NULL skb_head\n", __func__); |
| return; |
| } |
| temp_skb = skb_peek(skb_head); |
| if (unlikely(!temp_skb || !temp_skb->data)) { |
| IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| return; |
| } |
| |
| remaining = temp_skb->len - hdr_offset; |
| skb_queue_walk(skb_head, temp_skb) { |
| copy_len = remaining < pl_len ? remaining : pl_len; |
| memcpy(log_buf + copied_len, temp_skb->data + hdr_offset, |
| copy_len); |
| copied_len += copy_len; |
| hdr_offset = 0; |
| if (copied_len == pl_len) |
| break; |
| remaining = pl_len - remaining; |
| } |
| } |
| |
| /** |
| * ipc_router_log_msg() - log all data messages exchanged |
| * @log_ctx: IPC Logging context specific to each transport |
| * @xchng_type: Identifies the data to be a receive or send. |
| * @data: IPC Router data packet or control msg received or to be send. |
| * @hdr: Reference to the router header |
| * @port_ptr: Local IPC Router port. |
| * @rport_ptr: Remote IPC Router port |
| * |
| * This function builds the log message that would be passed on to the IPC |
| * logging framework. The data messages that would be passed corresponds to |
| * the information that is exchanged between the IPC Router and it's clients. |
| */ |
| static void ipc_router_log_msg(void *log_ctx, u32 xchng_type, |
| void *data, struct rr_header_v1 *hdr, |
| struct msm_ipc_port *port_ptr, |
| struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| struct sk_buff_head *skb_head = NULL; |
| union rr_control_msg *msg = NULL; |
| struct rr_packet *pkt = NULL; |
| u64 pl_buf = 0; |
| struct sk_buff *skb; |
| u32 buf_len = 8; |
| u32 svc_id = 0; |
| u32 svc_ins = 0; |
| unsigned int hdr_offset = 0; |
| u32 port_type = 0; |
| |
| if (!log_ctx || !hdr || !data) |
| return; |
| |
| if (hdr->type == IPC_ROUTER_CTRL_CMD_DATA) { |
| pkt = (struct rr_packet *)data; |
| skb_head = pkt->pkt_fragment_q; |
| skb = skb_peek(skb_head); |
| if (!skb || !skb->data) { |
| IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| return; |
| } |
| |
| if (skb_queue_len(skb_head) == 1 && skb->len < 8) |
| buf_len = skb->len; |
| if (xchng_type == IPC_ROUTER_LOG_EVENT_TX && hdr->dst_node_id |
| != IPC_ROUTER_NID_LOCAL) { |
| if (hdr->version == IPC_ROUTER_V1) |
| hdr_offset = sizeof(struct rr_header_v1); |
| else if (hdr->version == IPC_ROUTER_V2) |
| hdr_offset = sizeof(struct rr_header_v2); |
| } |
| skb_copy_to_log_buf(skb_head, buf_len, hdr_offset, |
| (unsigned char *)&pl_buf); |
| |
| if (port_ptr && rport_ptr && (port_ptr->type == CLIENT_PORT) && |
| rport_ptr->server) { |
| svc_id = rport_ptr->server->name.service; |
| svc_ins = rport_ptr->server->name.instance; |
| port_type = CLIENT_PORT; |
| port_ptr->last_served_svc_id = |
| rport_ptr->server->name.service; |
| } else if (port_ptr && (port_ptr->type == SERVER_PORT)) { |
| svc_id = port_ptr->port_name.service; |
| svc_ins = port_ptr->port_name.instance; |
| port_type = SERVER_PORT; |
| } |
| IPC_RTR_INFO(log_ctx, |
| "%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", |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? |
| current->comm : "")), |
| (port_type == CLIENT_PORT ? "CLI" : "SRV"), |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX_ERR ? "TX_ERR" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX_ERR ? "RX_ERR" : |
| "UNKNOWN")))), |
| hdr->size, hdr->type, hdr->control_flag, |
| svc_id, svc_ins, hdr->src_node_id, hdr->src_port_id, |
| hdr->dst_node_id, hdr->dst_port_id, |
| (unsigned int)pl_buf, (unsigned int)(pl_buf >> 32)); |
| |
| } else { |
| msg = (union rr_control_msg *)data; |
| if (msg->cmd == IPC_ROUTER_CTRL_CMD_NEW_SERVER || |
| msg->cmd == IPC_ROUTER_CTRL_CMD_REMOVE_SERVER) |
| IPC_RTR_INFO(log_ctx, |
| "CTL MSG: %s cmd:0x%x SVC:<0x%x:0x%x> ADDR:<0x%x:0x%x>", |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX_ERR ? "TX_ERR" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX_ERR ? "RX_ERR" : |
| "UNKNOWN")))), |
| msg->cmd, msg->srv.service, msg->srv.instance, |
| msg->srv.node_id, msg->srv.port_id); |
| else if (msg->cmd == IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT || |
| msg->cmd == IPC_ROUTER_CTRL_CMD_RESUME_TX) |
| IPC_RTR_INFO(log_ctx, |
| "CTL MSG: %s cmd:0x%x ADDR: <0x%x:0x%x>", |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| msg->cmd, msg->cli.node_id, msg->cli.port_id); |
| else if (msg->cmd == IPC_ROUTER_CTRL_CMD_HELLO && hdr) { |
| IPC_RTR_INFO(log_ctx, |
| "CTL MSG %s cmd:0x%x ADDR:0x%x", |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| msg->cmd, hdr->src_node_id); |
| if (hdr->src_node_id == 0 || hdr->src_node_id == 3) |
| pr_err("%s: Modem QMI Readiness %s cmd:0x%x ADDR:0x%x\n", |
| __func__, |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : |
| "ERR")), msg->cmd, hdr->src_node_id); |
| } |
| else |
| IPC_RTR_INFO(log_ctx, |
| "%s UNKNOWN cmd:0x%x", |
| (xchng_type == IPC_ROUTER_LOG_EVENT_RX ? "RX" : |
| (xchng_type == IPC_ROUTER_LOG_EVENT_TX ? "TX" : "ERR")), |
| msg->cmd); |
| } |
| } |
| |
| /* Must be called with routing_table_lock_lha3 locked. */ |
| static struct msm_ipc_routing_table_entry *lookup_routing_table( |
| u32 node_id) |
| { |
| u32 key = (node_id % RT_HASH_SIZE); |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| list_for_each_entry(rt_entry, &routing_table[key], list) { |
| if (rt_entry->node_id == node_id) |
| return rt_entry; |
| } |
| return NULL; |
| } |
| |
| /** |
| * create_routing_table_entry() - Lookup and create a routing table entry |
| * @node_id: Node ID of the routing table entry to be created. |
| * @xprt_info: XPRT through which the node ID is reachable. |
| * |
| * @return: a reference to the routing table entry on success, NULL on failure. |
| */ |
| static struct msm_ipc_routing_table_entry *create_routing_table_entry( |
| u32 node_id, struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| int i; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| u32 key; |
| |
| down_write(&routing_table_lock_lha3); |
| rt_entry = lookup_routing_table(node_id); |
| if (rt_entry) |
| goto out_create_rtentry1; |
| |
| rt_entry = kmalloc(sizeof(*rt_entry), GFP_KERNEL); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: rt_entry allocation failed for %d\n", |
| __func__, node_id); |
| goto out_create_rtentry2; |
| } |
| |
| for (i = 0; i < RP_HASH_SIZE; i++) |
| INIT_LIST_HEAD(&rt_entry->remote_port_list[i]); |
| init_rwsem(&rt_entry->lock_lha4); |
| kref_init(&rt_entry->ref); |
| rt_entry->node_id = node_id; |
| rt_entry->xprt_info = xprt_info; |
| if (xprt_info) |
| rt_entry->neighbor_node_id = xprt_info->remote_node_id; |
| |
| key = (node_id % RT_HASH_SIZE); |
| list_add_tail(&rt_entry->list, &routing_table[key]); |
| out_create_rtentry1: |
| kref_get(&rt_entry->ref); |
| out_create_rtentry2: |
| up_write(&routing_table_lock_lha3); |
| return rt_entry; |
| } |
| |
| /** |
| * ipc_router_get_rtentry_ref() - Get a reference to the routing table entry |
| * @node_id: Node ID of the routing table entry. |
| * |
| * @return: a reference to the routing table entry on success, NULL on failure. |
| * |
| * This function is used to obtain a reference to the rounting table entry |
| * corresponding to a node id. |
| */ |
| static struct msm_ipc_routing_table_entry *ipc_router_get_rtentry_ref( |
| u32 node_id) |
| { |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| down_read(&routing_table_lock_lha3); |
| rt_entry = lookup_routing_table(node_id); |
| if (rt_entry) |
| kref_get(&rt_entry->ref); |
| up_read(&routing_table_lock_lha3); |
| return rt_entry; |
| } |
| |
| /** |
| * ipc_router_release_rtentry() - Cleanup and release the routing table entry |
| * @ref: Reference to the entry. |
| * |
| * This function is called when all references to the routing table entry are |
| * released. |
| */ |
| void ipc_router_release_rtentry(struct kref *ref) |
| { |
| struct msm_ipc_routing_table_entry *rt_entry = |
| container_of(ref, struct msm_ipc_routing_table_entry, ref); |
| |
| /* All references to a routing entry will be put only under SSR. |
| * As part of SSR, all the internals of the routing table entry |
| * are cleaned. So just free the routing table entry. |
| */ |
| kfree(rt_entry); |
| } |
| |
| struct rr_packet *rr_read(struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| struct rr_packet *temp_pkt; |
| |
| if (!xprt_info) |
| return NULL; |
| |
| mutex_lock(&xprt_info->rx_lock_lhb2); |
| if (xprt_info->abort_data_read) { |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| IPC_RTR_ERR("%s detected SSR & exiting now\n", |
| xprt_info->xprt->name); |
| return NULL; |
| } |
| |
| if (list_empty(&xprt_info->pkt_list)) { |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| return NULL; |
| } |
| |
| temp_pkt = list_first_entry(&xprt_info->pkt_list, |
| struct rr_packet, list); |
| list_del(&temp_pkt->list); |
| if (list_empty(&xprt_info->pkt_list)) |
| __pm_relax(&xprt_info->ws); |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| return temp_pkt; |
| } |
| |
| struct rr_packet *clone_pkt(struct rr_packet *pkt) |
| { |
| struct rr_packet *cloned_pkt; |
| struct sk_buff *temp_skb, *cloned_skb; |
| struct sk_buff_head *pkt_fragment_q; |
| |
| cloned_pkt = kzalloc(sizeof(*cloned_pkt), GFP_KERNEL); |
| if (!cloned_pkt) { |
| IPC_RTR_ERR("%s: failure\n", __func__); |
| return NULL; |
| } |
| memcpy(&cloned_pkt->hdr, &pkt->hdr, sizeof(struct rr_header_v1)); |
| if (pkt->opt_hdr.len > 0) { |
| cloned_pkt->opt_hdr.data = kmalloc(pkt->opt_hdr.len, |
| GFP_KERNEL); |
| if (!cloned_pkt->opt_hdr.data) { |
| IPC_RTR_ERR("%s: Memory allocation Failed\n", __func__); |
| } else { |
| cloned_pkt->opt_hdr.len = pkt->opt_hdr.len; |
| memcpy(cloned_pkt->opt_hdr.data, pkt->opt_hdr.data, |
| pkt->opt_hdr.len); |
| } |
| } |
| |
| pkt_fragment_q = kmalloc(sizeof(*pkt_fragment_q), GFP_KERNEL); |
| if (!pkt_fragment_q) { |
| IPC_RTR_ERR("%s: pkt_frag_q alloc failure\n", __func__); |
| kfree(cloned_pkt); |
| return NULL; |
| } |
| skb_queue_head_init(pkt_fragment_q); |
| kref_init(&cloned_pkt->ref); |
| |
| skb_queue_walk(pkt->pkt_fragment_q, temp_skb) { |
| cloned_skb = skb_clone(temp_skb, GFP_KERNEL); |
| if (!cloned_skb) |
| goto fail_clone; |
| skb_queue_tail(pkt_fragment_q, cloned_skb); |
| } |
| cloned_pkt->pkt_fragment_q = pkt_fragment_q; |
| cloned_pkt->length = pkt->length; |
| cloned_pkt->ws_need = pkt->ws_need; |
| return cloned_pkt; |
| |
| fail_clone: |
| while (!skb_queue_empty(pkt_fragment_q)) { |
| temp_skb = skb_dequeue(pkt_fragment_q); |
| kfree_skb(temp_skb); |
| } |
| kfree(pkt_fragment_q); |
| if (cloned_pkt->opt_hdr.len > 0) |
| kfree(cloned_pkt->opt_hdr.data); |
| kfree(cloned_pkt); |
| return NULL; |
| } |
| |
| /** |
| * create_pkt() - Create a Router packet |
| * @data: SKB queue to be contained inside the packet. |
| * |
| * @return: pointer to packet on success, NULL on failure. |
| */ |
| struct rr_packet *create_pkt(struct sk_buff_head *data) |
| { |
| struct rr_packet *pkt; |
| struct sk_buff *temp_skb; |
| |
| pkt = kzalloc(sizeof(*pkt), GFP_KERNEL); |
| if (!pkt) { |
| IPC_RTR_ERR("%s: failure\n", __func__); |
| return NULL; |
| } |
| |
| if (data) { |
| pkt->pkt_fragment_q = data; |
| skb_queue_walk(pkt->pkt_fragment_q, temp_skb) |
| pkt->length += temp_skb->len; |
| } else { |
| pkt->pkt_fragment_q = kmalloc(sizeof(*pkt->pkt_fragment_q), |
| GFP_KERNEL); |
| if (!pkt->pkt_fragment_q) { |
| IPC_RTR_ERR("%s: Couldn't alloc pkt_fragment_q\n", |
| __func__); |
| kfree(pkt); |
| return NULL; |
| } |
| skb_queue_head_init(pkt->pkt_fragment_q); |
| } |
| kref_init(&pkt->ref); |
| return pkt; |
| } |
| |
| void release_pkt(struct rr_packet *pkt) |
| { |
| struct sk_buff *temp_skb; |
| |
| if (!pkt) |
| return; |
| |
| if (!pkt->pkt_fragment_q) { |
| kfree(pkt); |
| return; |
| } |
| |
| while (!skb_queue_empty(pkt->pkt_fragment_q)) { |
| temp_skb = skb_dequeue(pkt->pkt_fragment_q); |
| kfree_skb(temp_skb); |
| } |
| kfree(pkt->pkt_fragment_q); |
| if (pkt->opt_hdr.len > 0) |
| kfree(pkt->opt_hdr.data); |
| kfree(pkt); |
| } |
| |
| static struct sk_buff_head *msm_ipc_router_buf_to_skb(void *buf, |
| unsigned int buf_len) |
| { |
| struct sk_buff_head *skb_head; |
| struct sk_buff *skb; |
| int first = 1, offset = 0; |
| int skb_size, data_size; |
| void *data; |
| int last = 1; |
| int align_size; |
| |
| skb_head = kmalloc(sizeof(*skb_head), GFP_KERNEL); |
| if (!skb_head) { |
| IPC_RTR_ERR("%s: Couldnot allocate skb_head\n", __func__); |
| return NULL; |
| } |
| skb_queue_head_init(skb_head); |
| |
| data_size = buf_len; |
| align_size = ALIGN_SIZE(data_size); |
| while (offset != buf_len) { |
| skb_size = data_size; |
| if (first) |
| skb_size += IPC_ROUTER_HDR_SIZE; |
| if (last) |
| skb_size += align_size; |
| |
| skb = alloc_skb(skb_size, GFP_KERNEL); |
| if (!skb) { |
| if (skb_size <= (PAGE_SIZE / 2)) { |
| IPC_RTR_ERR("%s: cannot allocate skb\n", |
| __func__); |
| goto buf_to_skb_error; |
| } |
| data_size = data_size / 2; |
| last = 0; |
| continue; |
| } |
| |
| if (first) { |
| skb_reserve(skb, IPC_ROUTER_HDR_SIZE); |
| first = 0; |
| } |
| |
| data = skb_put(skb, data_size); |
| memcpy(skb->data, buf + offset, data_size); |
| skb_queue_tail(skb_head, skb); |
| offset += data_size; |
| data_size = buf_len - offset; |
| last = 1; |
| } |
| return skb_head; |
| |
| buf_to_skb_error: |
| while (!skb_queue_empty(skb_head)) { |
| skb = skb_dequeue(skb_head); |
| kfree_skb(skb); |
| } |
| kfree(skb_head); |
| return NULL; |
| } |
| |
| static void *msm_ipc_router_skb_to_buf(struct sk_buff_head *skb_head, |
| unsigned int len) |
| { |
| struct sk_buff *temp; |
| unsigned int offset = 0, buf_len = 0, copy_len; |
| void *buf; |
| |
| if (!skb_head) { |
| IPC_RTR_ERR("%s: NULL skb_head\n", __func__); |
| return NULL; |
| } |
| |
| temp = skb_peek(skb_head); |
| buf_len = len; |
| buf = kmalloc(buf_len, GFP_KERNEL); |
| if (!buf) { |
| IPC_RTR_ERR("%s: cannot allocate buf\n", __func__); |
| return NULL; |
| } |
| skb_queue_walk(skb_head, temp) { |
| copy_len = buf_len < temp->len ? buf_len : temp->len; |
| memcpy(buf + offset, temp->data, copy_len); |
| offset += copy_len; |
| buf_len -= copy_len; |
| } |
| return buf; |
| } |
| |
| void msm_ipc_router_free_skb(struct sk_buff_head *skb_head) |
| { |
| struct sk_buff *temp_skb; |
| |
| if (!skb_head) |
| return; |
| |
| while (!skb_queue_empty(skb_head)) { |
| temp_skb = skb_dequeue(skb_head); |
| kfree_skb(temp_skb); |
| } |
| kfree(skb_head); |
| } |
| |
| /** |
| * extract_optional_header() - Extract the optional header from skb |
| * @pkt: Packet structure into which the header has to be extracted. |
| * @opt_len: The optional header length in word size. |
| * |
| * @return: Length of optional header in bytes if success, zero otherwise. |
| */ |
| static int extract_optional_header(struct rr_packet *pkt, u8 opt_len) |
| { |
| size_t offset = 0, buf_len = 0, copy_len, opt_hdr_len; |
| struct sk_buff *temp; |
| struct sk_buff_head *skb_head; |
| |
| opt_hdr_len = opt_len * IPCR_WORD_SIZE; |
| pkt->opt_hdr.data = kmalloc(opt_hdr_len, GFP_KERNEL); |
| if (!pkt->opt_hdr.data) { |
| IPC_RTR_ERR("%s: Memory allocation Failed\n", __func__); |
| return 0; |
| } |
| skb_head = pkt->pkt_fragment_q; |
| buf_len = opt_hdr_len; |
| skb_queue_walk(skb_head, temp) { |
| copy_len = buf_len < temp->len ? buf_len : temp->len; |
| memcpy(pkt->opt_hdr.data + offset, temp->data, copy_len); |
| offset += copy_len; |
| buf_len -= copy_len; |
| skb_pull(temp, copy_len); |
| if (temp->len == 0) { |
| skb_dequeue(skb_head); |
| kfree_skb(temp); |
| } |
| } |
| pkt->opt_hdr.len = opt_hdr_len; |
| return opt_hdr_len; |
| } |
| |
| /** |
| * extract_header_v1() - Extract IPC Router header of version 1 |
| * @pkt: Packet structure into which the header has to be extraced. |
| * @skb: SKB from which the header has to be extracted. |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| */ |
| static int extract_header_v1(struct rr_packet *pkt, struct sk_buff *skb) |
| { |
| if (!pkt || !skb) { |
| IPC_RTR_ERR("%s: Invalid pkt or skb\n", __func__); |
| return -EINVAL; |
| } |
| |
| memcpy(&pkt->hdr, skb->data, sizeof(struct rr_header_v1)); |
| skb_pull(skb, sizeof(struct rr_header_v1)); |
| pkt->length -= sizeof(struct rr_header_v1); |
| return 0; |
| } |
| |
| /** |
| * extract_header_v2() - Extract IPC Router header of version 2 |
| * @pkt: Packet structure into which the header has to be extraced. |
| * @skb: SKB from which the header has to be extracted. |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| */ |
| static int extract_header_v2(struct rr_packet *pkt, struct sk_buff *skb) |
| { |
| struct rr_header_v2 *hdr; |
| u8 opt_len; |
| size_t opt_hdr_len; |
| size_t total_hdr_size = sizeof(*hdr); |
| |
| if (!pkt || !skb) { |
| IPC_RTR_ERR("%s: Invalid pkt or skb\n", __func__); |
| return -EINVAL; |
| } |
| |
| hdr = (struct rr_header_v2 *)skb->data; |
| pkt->hdr.version = (u32)hdr->version; |
| pkt->hdr.type = (u32)hdr->type; |
| pkt->hdr.src_node_id = (u32)hdr->src_node_id; |
| pkt->hdr.src_port_id = (u32)hdr->src_port_id; |
| pkt->hdr.size = (u32)hdr->size; |
| pkt->hdr.control_flag = (u32)hdr->control_flag; |
| pkt->hdr.dst_node_id = (u32)hdr->dst_node_id; |
| pkt->hdr.dst_port_id = (u32)hdr->dst_port_id; |
| opt_len = hdr->opt_len; |
| skb_pull(skb, total_hdr_size); |
| if (opt_len > 0) { |
| opt_hdr_len = extract_optional_header(pkt, opt_len); |
| total_hdr_size += opt_hdr_len; |
| } |
| pkt->length -= total_hdr_size; |
| return 0; |
| } |
| |
| /** |
| * extract_header() - Extract IPC Router header |
| * @pkt: Packet from which the header has to be extraced. |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| * |
| * This function will check if the header version is v1 or v2 and invoke |
| * the corresponding helper function to extract the IPC Router header. |
| */ |
| static int extract_header(struct rr_packet *pkt) |
| { |
| struct sk_buff *temp_skb; |
| int ret; |
| |
| if (!pkt) { |
| IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| return -EINVAL; |
| } |
| |
| temp_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!temp_skb || !temp_skb->data) { |
| IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (temp_skb->data[0] == IPC_ROUTER_V1) { |
| ret = extract_header_v1(pkt, temp_skb); |
| } else if (temp_skb->data[0] == IPC_ROUTER_V2) { |
| ret = extract_header_v2(pkt, temp_skb); |
| } else { |
| IPC_RTR_ERR("%s: Invalid Header version %02x\n", |
| __func__, temp_skb->data[0]); |
| print_hex_dump(KERN_ERR, "Header: ", DUMP_PREFIX_ADDRESS, |
| 16, 1, temp_skb->data, pkt->length, true); |
| return -EINVAL; |
| } |
| return ret; |
| } |
| |
| /** |
| * calc_tx_header_size() - Calculate header size to be reserved in SKB |
| * @pkt: Packet in which the space for header has to be reserved. |
| * @dst_xprt_info: XPRT through which the destination is reachable. |
| * |
| * @return: required header size on success, |
| * starndard Linux error codes on failure. |
| * |
| * This function is used to calculate the header size that has to be reserved |
| * in a transmit SKB. The header size is calculated based on the XPRT through |
| * which the destination node is reachable. |
| */ |
| static int calc_tx_header_size(struct rr_packet *pkt, |
| struct msm_ipc_router_xprt_info *dst_xprt_info) |
| { |
| int hdr_size = 0; |
| int xprt_version = 0; |
| struct msm_ipc_router_xprt_info *xprt_info = dst_xprt_info; |
| |
| if (!pkt) { |
| IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (xprt_info) |
| xprt_version = xprt_info->xprt->get_version(xprt_info->xprt); |
| |
| if (xprt_version == IPC_ROUTER_V1) { |
| pkt->hdr.version = IPC_ROUTER_V1; |
| hdr_size = sizeof(struct rr_header_v1); |
| } else if (xprt_version == IPC_ROUTER_V2) { |
| pkt->hdr.version = IPC_ROUTER_V2; |
| hdr_size = sizeof(struct rr_header_v2) + pkt->opt_hdr.len; |
| } else { |
| IPC_RTR_ERR("%s: Invalid xprt_version %d\n", |
| __func__, xprt_version); |
| hdr_size = -EINVAL; |
| } |
| |
| return hdr_size; |
| } |
| |
| /** |
| * calc_rx_header_size() - Calculate the RX header size |
| * @xprt_info: XPRT info of the received message. |
| * |
| * @return: valid header size on success, INT_MAX on failure. |
| */ |
| static int calc_rx_header_size(struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| int xprt_version = 0; |
| int hdr_size = INT_MAX; |
| |
| if (xprt_info) |
| xprt_version = xprt_info->xprt->get_version(xprt_info->xprt); |
| |
| if (xprt_version == IPC_ROUTER_V1) |
| hdr_size = sizeof(struct rr_header_v1); |
| else if (xprt_version == IPC_ROUTER_V2) |
| hdr_size = sizeof(struct rr_header_v2); |
| return hdr_size; |
| } |
| |
| /** |
| * prepend_header_v1() - Prepend IPC Router header of version 1 |
| * @pkt: Packet structure which contains the header info to be prepended. |
| * @hdr_size: Size of the header |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| */ |
| static int prepend_header_v1(struct rr_packet *pkt, int hdr_size) |
| { |
| struct sk_buff *temp_skb; |
| struct rr_header_v1 *hdr; |
| |
| if (!pkt || hdr_size <= 0) { |
| IPC_RTR_ERR("%s: Invalid input parameters\n", __func__); |
| return -EINVAL; |
| } |
| |
| temp_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!temp_skb || !temp_skb->data) { |
| IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (skb_headroom(temp_skb) < hdr_size) { |
| temp_skb = alloc_skb(hdr_size, GFP_KERNEL); |
| if (!temp_skb) { |
| IPC_RTR_ERR("%s: Could not allocate SKB of size %d\n", |
| __func__, hdr_size); |
| return -ENOMEM; |
| } |
| skb_reserve(temp_skb, hdr_size); |
| } |
| |
| hdr = (struct rr_header_v1 *)skb_push(temp_skb, hdr_size); |
| memcpy(hdr, &pkt->hdr, hdr_size); |
| if (temp_skb != skb_peek(pkt->pkt_fragment_q)) |
| skb_queue_head(pkt->pkt_fragment_q, temp_skb); |
| pkt->length += hdr_size; |
| return 0; |
| } |
| |
| /** |
| * prepend_header_v2() - Prepend IPC Router header of version 2 |
| * @pkt: Packet structure which contains the header info to be prepended. |
| * @hdr_size: Size of the header |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| */ |
| static int prepend_header_v2(struct rr_packet *pkt, int hdr_size) |
| { |
| struct sk_buff *temp_skb; |
| struct rr_header_v2 *hdr; |
| |
| if (!pkt || hdr_size <= 0) { |
| IPC_RTR_ERR("%s: Invalid input parameters\n", __func__); |
| return -EINVAL; |
| } |
| |
| temp_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!temp_skb || !temp_skb->data) { |
| IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (skb_headroom(temp_skb) < hdr_size) { |
| temp_skb = alloc_skb(hdr_size, GFP_KERNEL); |
| if (!temp_skb) { |
| IPC_RTR_ERR("%s: Could not allocate SKB of size %d\n", |
| __func__, hdr_size); |
| return -ENOMEM; |
| } |
| skb_reserve(temp_skb, hdr_size); |
| } |
| |
| hdr = (struct rr_header_v2 *)skb_push(temp_skb, hdr_size); |
| hdr->version = (u8)pkt->hdr.version; |
| hdr->type = (u8)pkt->hdr.type; |
| hdr->control_flag = (u8)pkt->hdr.control_flag; |
| hdr->size = (u32)pkt->hdr.size; |
| hdr->src_node_id = (u16)pkt->hdr.src_node_id; |
| hdr->src_port_id = (u16)pkt->hdr.src_port_id; |
| hdr->dst_node_id = (u16)pkt->hdr.dst_node_id; |
| hdr->dst_port_id = (u16)pkt->hdr.dst_port_id; |
| if (pkt->opt_hdr.len > 0) { |
| hdr->opt_len = pkt->opt_hdr.len / IPCR_WORD_SIZE; |
| memcpy(hdr + sizeof(*hdr), pkt->opt_hdr.data, pkt->opt_hdr.len); |
| } else { |
| hdr->opt_len = 0; |
| } |
| if (temp_skb != skb_peek(pkt->pkt_fragment_q)) |
| skb_queue_head(pkt->pkt_fragment_q, temp_skb); |
| pkt->length += hdr_size; |
| return 0; |
| } |
| |
| /** |
| * prepend_header() - Prepend IPC Router header |
| * @pkt: Packet structure which contains the header info to be prepended. |
| * @xprt_info: XPRT through which the packet is transmitted. |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| * |
| * This function prepends the header to the packet to be transmitted. The |
| * IPC Router header version to be prepended depends on the XPRT through |
| * which the destination is reachable. |
| */ |
| static int prepend_header(struct rr_packet *pkt, |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| int hdr_size; |
| struct sk_buff *temp_skb; |
| |
| if (!pkt) { |
| IPC_RTR_ERR("%s: NULL PKT\n", __func__); |
| return -EINVAL; |
| } |
| |
| temp_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!temp_skb || !temp_skb->data) { |
| IPC_RTR_ERR("%s: No SKBs in skb_queue\n", __func__); |
| return -EINVAL; |
| } |
| |
| hdr_size = calc_tx_header_size(pkt, xprt_info); |
| if (hdr_size <= 0) |
| return hdr_size; |
| |
| if (pkt->hdr.version == IPC_ROUTER_V1) |
| return prepend_header_v1(pkt, hdr_size); |
| else if (pkt->hdr.version == IPC_ROUTER_V2) |
| return prepend_header_v2(pkt, hdr_size); |
| else |
| return -EINVAL; |
| } |
| |
| /** |
| * defragment_pkt() - Defragment and linearize the packet |
| * @pkt: Packet to be linearized. |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| * |
| * Some packets contain fragments of data over multiple SKBs. If an XPRT |
| * does not supported fragmented writes, linearize multiple SKBs into one |
| * single SKB. |
| */ |
| static int defragment_pkt(struct rr_packet *pkt) |
| { |
| struct sk_buff *dst_skb, *src_skb, *temp_skb; |
| int offset = 0, buf_len = 0, copy_len; |
| void *buf; |
| int align_size; |
| |
| if (!pkt || pkt->length <= 0) { |
| IPC_RTR_ERR("%s: Invalid PKT\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (skb_queue_len(pkt->pkt_fragment_q) == 1) |
| return 0; |
| |
| align_size = ALIGN_SIZE(pkt->length); |
| dst_skb = alloc_skb(pkt->length + align_size, GFP_KERNEL); |
| if (!dst_skb) { |
| IPC_RTR_ERR("%s: could not allocate one skb of size %d\n", |
| __func__, pkt->length); |
| return -ENOMEM; |
| } |
| buf = skb_put(dst_skb, pkt->length); |
| buf_len = pkt->length; |
| |
| skb_queue_walk(pkt->pkt_fragment_q, src_skb) { |
| copy_len = buf_len < src_skb->len ? buf_len : src_skb->len; |
| memcpy(buf + offset, src_skb->data, copy_len); |
| offset += copy_len; |
| buf_len -= copy_len; |
| } |
| |
| while (!skb_queue_empty(pkt->pkt_fragment_q)) { |
| temp_skb = skb_dequeue(pkt->pkt_fragment_q); |
| kfree_skb(temp_skb); |
| } |
| skb_queue_tail(pkt->pkt_fragment_q, dst_skb); |
| return 0; |
| } |
| |
| static int post_pkt_to_port(struct msm_ipc_port *port_ptr, |
| struct rr_packet *pkt, int clone) |
| { |
| struct rr_packet *temp_pkt = pkt; |
| void (*notify)(unsigned int event, void *oob_data, |
| size_t oob_data_len, void *priv); |
| void (*data_ready)(struct sock *sk) = NULL; |
| struct sock *sk; |
| u32 pkt_type; |
| |
| if (unlikely(!port_ptr || !pkt)) |
| return -EINVAL; |
| |
| if (clone) { |
| temp_pkt = clone_pkt(pkt); |
| if (!temp_pkt) { |
| IPC_RTR_ERR( |
| "%s: Error cloning packet for port %08x:%08x\n", |
| __func__, port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| return -ENOMEM; |
| } |
| } |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| if (pkt->ws_need) |
| __pm_stay_awake(port_ptr->port_rx_ws); |
| list_add_tail(&temp_pkt->list, &port_ptr->port_rx_q); |
| wake_up(&port_ptr->port_rx_wait_q); |
| notify = port_ptr->notify; |
| pkt_type = temp_pkt->hdr.type; |
| sk = (struct sock *)port_ptr->endpoint; |
| if (sk) { |
| read_lock(&sk->sk_callback_lock); |
| data_ready = sk->sk_data_ready; |
| read_unlock(&sk->sk_callback_lock); |
| } |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| if (notify) |
| notify(pkt_type, NULL, 0, port_ptr->priv); |
| else if (sk && data_ready) |
| data_ready(sk); |
| |
| return 0; |
| } |
| |
| /** |
| * ipc_router_peek_pkt_size() - Peek into the packet header to get potential |
| * packet size |
| * @data: Starting address of the packet which points to router header. |
| * |
| * @returns: potential packet size on success, < 0 on error. |
| * |
| * This function is used by the underlying transport abstraction layer to |
| * peek into the potential packet size of an incoming packet. This information |
| * is used to perform link layer fragmentation and re-assembly |
| */ |
| int ipc_router_peek_pkt_size(char *data) |
| { |
| int size; |
| |
| if (!data) { |
| pr_err("%s: NULL PKT\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (data[0] == IPC_ROUTER_V1) |
| size = ((struct rr_header_v1 *)data)->size + |
| sizeof(struct rr_header_v1); |
| else if (data[0] == IPC_ROUTER_V2) |
| size = ((struct rr_header_v2 *)data)->size + |
| ((struct rr_header_v2 *)data)->opt_len * IPCR_WORD_SIZE |
| + sizeof(struct rr_header_v2); |
| else |
| return -EINVAL; |
| |
| size += ALIGN_SIZE(size); |
| return size; |
| } |
| |
| static int post_control_ports(struct rr_packet *pkt) |
| { |
| struct msm_ipc_port *port_ptr; |
| |
| if (!pkt) |
| return -EINVAL; |
| |
| down_read(&control_ports_lock_lha5); |
| list_for_each_entry(port_ptr, &control_ports, list) |
| post_pkt_to_port(port_ptr, pkt, 1); |
| up_read(&control_ports_lock_lha5); |
| return 0; |
| } |
| |
| static u32 allocate_port_id(void) |
| { |
| u32 port_id = 0, prev_port_id, key; |
| struct msm_ipc_port *port_ptr; |
| |
| mutex_lock(&next_port_id_lock_lhc1); |
| prev_port_id = next_port_id; |
| down_read(&local_ports_lock_lhc2); |
| do { |
| next_port_id++; |
| if ((next_port_id & IPC_ROUTER_ADDRESS) == IPC_ROUTER_ADDRESS) |
| next_port_id = 1; |
| |
| key = (next_port_id & (LP_HASH_SIZE - 1)); |
| if (list_empty(&local_ports[key])) { |
| port_id = next_port_id; |
| break; |
| } |
| list_for_each_entry(port_ptr, &local_ports[key], list) { |
| if (port_ptr->this_port.port_id == next_port_id) { |
| port_id = next_port_id; |
| break; |
| } |
| } |
| if (!port_id) { |
| port_id = next_port_id; |
| break; |
| } |
| port_id = 0; |
| } while (next_port_id != prev_port_id); |
| up_read(&local_ports_lock_lhc2); |
| mutex_unlock(&next_port_id_lock_lhc1); |
| |
| return port_id; |
| } |
| |
| void msm_ipc_router_add_local_port(struct msm_ipc_port *port_ptr) |
| { |
| u32 key; |
| |
| if (!port_ptr) |
| return; |
| |
| key = (port_ptr->this_port.port_id & (LP_HASH_SIZE - 1)); |
| down_write(&local_ports_lock_lhc2); |
| list_add_tail(&port_ptr->list, &local_ports[key]); |
| up_write(&local_ports_lock_lhc2); |
| } |
| |
| /** |
| * msm_ipc_router_create_raw_port() - Create an IPC Router port |
| * @endpoint: User-space space socket information to be cached. |
| * @notify: Function to notify incoming events on the port. |
| * @event: Event ID to be handled. |
| * @oob_data: Any out-of-band data associated with the event. |
| * @oob_data_len: Size of the out-of-band data, if valid. |
| * @priv: Private data registered during the port creation. |
| * @priv: Private Data to be passed during the event notification. |
| * |
| * @return: Valid pointer to port on success, NULL on failure. |
| * |
| * This function is used to create an IPC Router port. The port is used for |
| * communication locally or outside the subsystem. |
| */ |
| struct msm_ipc_port * |
| msm_ipc_router_create_raw_port(void *endpoint, |
| void (*notify)(unsigned int event, |
| void *oob_data, |
| size_t oob_data_len, void *priv), |
| void *priv) |
| { |
| struct msm_ipc_port *port_ptr; |
| |
| port_ptr = kzalloc(sizeof(*port_ptr), GFP_KERNEL); |
| if (!port_ptr) |
| return NULL; |
| |
| port_ptr->this_port.node_id = IPC_ROUTER_NID_LOCAL; |
| port_ptr->this_port.port_id = allocate_port_id(); |
| if (!port_ptr->this_port.port_id) { |
| IPC_RTR_ERR("%s: All port ids are in use\n", __func__); |
| kfree(port_ptr); |
| return NULL; |
| } |
| |
| mutex_init(&port_ptr->port_lock_lhc3); |
| INIT_LIST_HEAD(&port_ptr->port_rx_q); |
| mutex_init(&port_ptr->port_rx_q_lock_lhc3); |
| init_waitqueue_head(&port_ptr->port_rx_wait_q); |
| snprintf(port_ptr->rx_ws_name, MAX_WS_NAME_SZ, |
| "ipc%08x_%d_%s", |
| port_ptr->this_port.port_id, |
| task_pid_nr(current), |
| current->comm); |
| port_ptr->port_rx_ws = wakeup_source_register(port_ptr->rx_ws_name); |
| if (!port_ptr->port_rx_ws) { |
| kfree(port_ptr); |
| return NULL; |
| } |
| init_waitqueue_head(&port_ptr->port_tx_wait_q); |
| kref_init(&port_ptr->ref); |
| |
| port_ptr->endpoint = endpoint; |
| port_ptr->notify = notify; |
| port_ptr->priv = priv; |
| |
| msm_ipc_router_add_local_port(port_ptr); |
| if (endpoint) |
| sock_hold(ipc_port_sk(endpoint)); |
| return port_ptr; |
| } |
| |
| /** |
| * ipc_router_get_port_ref() - Get a reference to the local port |
| * @port_id: Port ID of the local port for which reference is get. |
| * |
| * @return: If port is found, a reference to the port is returned. |
| * Else NULL is returned. |
| */ |
| static struct msm_ipc_port *ipc_router_get_port_ref(u32 port_id) |
| { |
| int key = (port_id & (LP_HASH_SIZE - 1)); |
| struct msm_ipc_port *port_ptr; |
| |
| down_read(&local_ports_lock_lhc2); |
| list_for_each_entry(port_ptr, &local_ports[key], list) { |
| if (port_ptr->this_port.port_id == port_id) { |
| kref_get(&port_ptr->ref); |
| up_read(&local_ports_lock_lhc2); |
| return port_ptr; |
| } |
| } |
| up_read(&local_ports_lock_lhc2); |
| return NULL; |
| } |
| |
| /** |
| * ipc_router_release_port() - Cleanup and release the port |
| * @ref: Reference to the port. |
| * |
| * This function is called when all references to the port are released. |
| */ |
| void ipc_router_release_port(struct kref *ref) |
| { |
| struct rr_packet *pkt, *temp_pkt; |
| struct msm_ipc_port *port_ptr = |
| container_of(ref, struct msm_ipc_port, ref); |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| list_for_each_entry_safe(pkt, temp_pkt, &port_ptr->port_rx_q, list) { |
| list_del(&pkt->list); |
| release_pkt(pkt); |
| } |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| wakeup_source_unregister(port_ptr->port_rx_ws); |
| if (port_ptr->endpoint) |
| sock_put(ipc_port_sk(port_ptr->endpoint)); |
| kfree(port_ptr); |
| } |
| |
| /** |
| * ipc_router_get_rport_ref()- Get reference to the remote port |
| * @node_id: Node ID corresponding to the remote port. |
| * @port_id: Port ID corresponding to the remote port. |
| * |
| * @return: a reference to the remote port on success, NULL on failure. |
| */ |
| static struct msm_ipc_router_remote_port *ipc_router_get_rport_ref( |
| u32 node_id, u32 port_id) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| int key = (port_id & (RP_HASH_SIZE - 1)); |
| |
| rt_entry = ipc_router_get_rtentry_ref(node_id); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: Node is not up\n", __func__); |
| return NULL; |
| } |
| |
| down_read(&rt_entry->lock_lha4); |
| list_for_each_entry(rport_ptr, |
| &rt_entry->remote_port_list[key], list) { |
| if (rport_ptr->port_id == port_id) { |
| kref_get(&rport_ptr->ref); |
| goto out_lookup_rmt_port1; |
| } |
| } |
| rport_ptr = NULL; |
| out_lookup_rmt_port1: |
| up_read(&rt_entry->lock_lha4); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| return rport_ptr; |
| } |
| |
| /** |
| * ipc_router_create_rport() - Create a remote port |
| * @node_id: Node ID corresponding to the remote port. |
| * @port_id: Port ID corresponding to the remote port. |
| * @xprt_info: XPRT through which the concerned node is reachable. |
| * |
| * @return: a reference to the remote port on success, NULL on failure. |
| */ |
| static struct msm_ipc_router_remote_port *ipc_router_create_rport( |
| u32 node_id, u32 port_id, |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| int key = (port_id & (RP_HASH_SIZE - 1)); |
| |
| rt_entry = create_routing_table_entry(node_id, xprt_info); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: Node cannot be created\n", __func__); |
| return NULL; |
| } |
| |
| down_write(&rt_entry->lock_lha4); |
| list_for_each_entry(rport_ptr, |
| &rt_entry->remote_port_list[key], list) { |
| if (rport_ptr->port_id == port_id) |
| goto out_create_rmt_port1; |
| } |
| |
| rport_ptr = kmalloc(sizeof(*rport_ptr), GFP_KERNEL); |
| if (!rport_ptr) { |
| IPC_RTR_ERR("%s: Remote port alloc failed\n", __func__); |
| goto out_create_rmt_port2; |
| } |
| rport_ptr->port_id = port_id; |
| rport_ptr->node_id = node_id; |
| rport_ptr->status = VALID; |
| rport_ptr->sec_rule = NULL; |
| rport_ptr->server = NULL; |
| rport_ptr->tx_quota_cnt = 0; |
| kref_init(&rport_ptr->ref); |
| mutex_init(&rport_ptr->rport_lock_lhb2); |
| INIT_LIST_HEAD(&rport_ptr->resume_tx_port_list); |
| INIT_LIST_HEAD(&rport_ptr->conn_info_list); |
| list_add_tail(&rport_ptr->list, |
| &rt_entry->remote_port_list[key]); |
| out_create_rmt_port1: |
| kref_get(&rport_ptr->ref); |
| out_create_rmt_port2: |
| up_write(&rt_entry->lock_lha4); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| return rport_ptr; |
| } |
| |
| /** |
| * msm_ipc_router_free_resume_tx_port() - Free the resume_tx ports |
| * @rport_ptr: Pointer to the remote port. |
| * |
| * This function deletes all the resume_tx ports associated with a remote port |
| * and frees the memory allocated to each resume_tx port. |
| * |
| * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| */ |
| static void msm_ipc_router_free_resume_tx_port( |
| struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| |
| list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| &rport_ptr->resume_tx_port_list, list) { |
| list_del(&rtx_port->list); |
| kfree(rtx_port); |
| } |
| } |
| |
| /** |
| * msm_ipc_router_lookup_resume_tx_port() - Lookup resume_tx port list |
| * @rport_ptr: Remote port whose resume_tx port list needs to be looked. |
| * @port_id: Port ID which needs to be looked from the list. |
| * |
| * return 1 if the port_id is found in the list, else 0. |
| * |
| * This function is used to lookup the existence of a local port in |
| * remote port's resume_tx list. This function is used to ensure that |
| * the same port is not added to the remote_port's resume_tx list repeatedly. |
| * |
| * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| */ |
| static int msm_ipc_router_lookup_resume_tx_port( |
| struct msm_ipc_router_remote_port *rport_ptr, u32 port_id) |
| { |
| struct msm_ipc_resume_tx_port *rtx_port; |
| |
| list_for_each_entry(rtx_port, &rport_ptr->resume_tx_port_list, list) { |
| if (port_id == rtx_port->port_id) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * ipc_router_dummy_write_space() - Dummy write space available callback |
| * @sk: Socket pointer for which the callback is called. |
| */ |
| void ipc_router_dummy_write_space(struct sock *sk) |
| { |
| } |
| |
| /** |
| * post_resume_tx() - Post the resume_tx event |
| * @rport_ptr: Pointer to the remote port |
| * @pkt : The data packet that is received on a resume_tx event |
| * @msg: Out of band data to be passed to kernel drivers |
| * |
| * This function informs about the reception of the resume_tx message from a |
| * remote port pointed by rport_ptr to all the local ports that are in the |
| * resume_tx_ports_list of this remote port. On posting the information, this |
| * function sequentially deletes each entry in the resume_tx_port_list of the |
| * remote port. |
| * |
| * Must be called with rport_ptr->rport_lock_lhb2 locked. |
| */ |
| static void post_resume_tx(struct msm_ipc_router_remote_port *rport_ptr, |
| struct rr_packet *pkt, union rr_control_msg *msg) |
| { |
| struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| struct msm_ipc_port *local_port; |
| struct sock *sk; |
| void (*write_space)(struct sock *sk) = NULL; |
| |
| list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| &rport_ptr->resume_tx_port_list, list) { |
| local_port = ipc_router_get_port_ref(rtx_port->port_id); |
| if (local_port && local_port->notify) { |
| wake_up(&local_port->port_tx_wait_q); |
| local_port->notify(IPC_ROUTER_CTRL_CMD_RESUME_TX, msg, |
| sizeof(*msg), local_port->priv); |
| } else if (local_port) { |
| wake_up(&local_port->port_tx_wait_q); |
| sk = ipc_port_sk(local_port->endpoint); |
| if (sk) { |
| read_lock(&sk->sk_callback_lock); |
| write_space = sk->sk_write_space; |
| read_unlock(&sk->sk_callback_lock); |
| } |
| if (write_space && |
| write_space != ipc_router_dummy_write_space) |
| write_space(sk); |
| else |
| post_pkt_to_port(local_port, pkt, 1); |
| } else { |
| IPC_RTR_ERR("%s: Local Port %d not Found", |
| __func__, rtx_port->port_id); |
| } |
| if (local_port) |
| kref_put(&local_port->ref, ipc_router_release_port); |
| list_del(&rtx_port->list); |
| kfree(rtx_port); |
| } |
| } |
| |
| /** |
| * signal_rport_exit() - Signal the local ports of remote port exit |
| * @rport_ptr: Remote port that is exiting. |
| * |
| * This function is used to signal the local ports that are waiting |
| * to resume transmission to a remote port that is exiting. |
| */ |
| static void signal_rport_exit(struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| struct msm_ipc_port *local_port; |
| |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| rport_ptr->status = RESET; |
| list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| &rport_ptr->resume_tx_port_list, list) { |
| local_port = ipc_router_get_port_ref(rtx_port->port_id); |
| if (local_port) { |
| wake_up(&local_port->port_tx_wait_q); |
| kref_put(&local_port->ref, ipc_router_release_port); |
| } |
| list_del(&rtx_port->list); |
| kfree(rtx_port); |
| } |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| } |
| |
| /** |
| * ipc_router_release_rport() - Cleanup and release the remote port |
| * @ref: Reference to the remote port. |
| * |
| * This function is called when all references to the remote port are released. |
| */ |
| static void ipc_router_release_rport(struct kref *ref) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr = |
| container_of(ref, struct msm_ipc_router_remote_port, ref); |
| |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| msm_ipc_router_free_resume_tx_port(rport_ptr); |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| kfree(rport_ptr); |
| } |
| |
| /** |
| * ipc_router_destroy_rport() - Destroy the remote port |
| * @rport_ptr: Pointer to the remote port to be destroyed. |
| */ |
| static void ipc_router_destroy_rport( |
| struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| u32 node_id; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| if (!rport_ptr) |
| return; |
| |
| node_id = rport_ptr->node_id; |
| rt_entry = ipc_router_get_rtentry_ref(node_id); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: Node %d is not up\n", __func__, node_id); |
| return; |
| } |
| down_write(&rt_entry->lock_lha4); |
| list_del(&rport_ptr->list); |
| up_write(&rt_entry->lock_lha4); |
| signal_rport_exit(rport_ptr); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| } |
| |
| /** |
| * msm_ipc_router_lookup_server() - Lookup server information |
| * @service: Service ID of the server info to be looked up. |
| * @instance: Instance ID of the server info to be looked up. |
| * @node_id: Node/Processor ID in which the server is hosted. |
| * @port_id: Port ID within the node in which the server is hosted. |
| * |
| * @return: If found Pointer to server structure, else NULL. |
| * |
| * Note1: Lock the server_list_lock_lha2 before accessing this function. |
| * Note2: If the <node_id:port_id> are <0:0>, then the lookup is restricted |
| * to <service:instance>. Used only when a client wants to send a |
| * message to any QMI server. |
| */ |
| static struct msm_ipc_server *msm_ipc_router_lookup_server( |
| u32 service, |
| u32 instance, |
| u32 node_id, |
| u32 port_id) |
| { |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| int key = (service & (SRV_HASH_SIZE - 1)); |
| |
| list_for_each_entry(server, &server_list[key], list) { |
| if ((server->name.service != service) || |
| (server->name.instance != instance)) |
| continue; |
| if ((node_id == 0) && (port_id == 0)) |
| return server; |
| list_for_each_entry(server_port, &server->server_port_list, |
| list) { |
| if ((server_port->server_addr.node_id == node_id) && |
| (server_port->server_addr.port_id == port_id)) |
| return server; |
| } |
| } |
| return NULL; |
| } |
| |
| /** |
| * ipc_router_get_server_ref() - Get reference to the server |
| * @svc: Service ID for which the reference is required. |
| * @ins: Instance ID for which the reference is required. |
| * @node_id: Node/Processor ID in which the server is hosted. |
| * @port_id: Port ID within the node in which the server is hosted. |
| * |
| * @return: If found return reference to server, else NULL. |
| */ |
| static struct msm_ipc_server *ipc_router_get_server_ref( |
| u32 svc, u32 ins, u32 node_id, u32 port_id) |
| { |
| struct msm_ipc_server *server; |
| |
| down_read(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server(svc, ins, node_id, port_id); |
| if (server) |
| kref_get(&server->ref); |
| up_read(&server_list_lock_lha2); |
| return server; |
| } |
| |
| /** |
| * ipc_router_release_server() - Cleanup and release the server |
| * @ref: Reference to the server. |
| * |
| * This function is called when all references to the server are released. |
| */ |
| static void ipc_router_release_server(struct kref *ref) |
| { |
| struct msm_ipc_server *server = |
| container_of(ref, struct msm_ipc_server, ref); |
| |
| kfree(server); |
| } |
| |
| /** |
| * msm_ipc_router_create_server() - Add server info to hash table |
| * @service: Service ID of the server info to be created. |
| * @instance: Instance ID of the server info to be created. |
| * @node_id: Node/Processor ID in which the server is hosted. |
| * @port_id: Port ID within the node in which the server is hosted. |
| * @xprt_info: XPRT through which the node hosting the server is reached. |
| * |
| * @return: Pointer to server structure on success, else NULL. |
| * |
| * This function adds the server info to the hash table. If the same |
| * server(i.e. <service_id:instance_id>) is hosted in different nodes, |
| * they are maintained as list of "server_port" under "server" structure. |
| */ |
| static struct msm_ipc_server *msm_ipc_router_create_server( |
| u32 service, |
| u32 instance, |
| u32 node_id, |
| u32 port_id, |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| struct msm_ipc_server *server = NULL; |
| struct msm_ipc_server_port *server_port; |
| struct platform_device *pdev; |
| int key = (service & (SRV_HASH_SIZE - 1)); |
| |
| down_write(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server(service, instance, 0, 0); |
| if (server) { |
| list_for_each_entry(server_port, &server->server_port_list, |
| list) { |
| if ((server_port->server_addr.node_id == node_id) && |
| (server_port->server_addr.port_id == port_id)) |
| goto return_server; |
| } |
| goto create_srv_port; |
| } |
| |
| server = kzalloc(sizeof(*server), GFP_KERNEL); |
| if (!server) { |
| up_write(&server_list_lock_lha2); |
| IPC_RTR_ERR("%s: Server allocation failed\n", __func__); |
| return NULL; |
| } |
| server->name.service = service; |
| server->name.instance = instance; |
| server->synced_sec_rule = 0; |
| INIT_LIST_HEAD(&server->server_port_list); |
| kref_init(&server->ref); |
| list_add_tail(&server->list, &server_list[key]); |
| scnprintf(server->pdev_name, sizeof(server->pdev_name), |
| "SVC%08x:%08x", service, instance); |
| server->next_pdev_id = 1; |
| |
| create_srv_port: |
| server_port = kzalloc(sizeof(*server_port), GFP_KERNEL); |
| pdev = platform_device_alloc(server->pdev_name, server->next_pdev_id); |
| if (!server_port || !pdev) { |
| kfree(server_port); |
| if (pdev) |
| platform_device_put(pdev); |
| if (list_empty(&server->server_port_list)) { |
| list_del(&server->list); |
| kfree(server); |
| } |
| up_write(&server_list_lock_lha2); |
| IPC_RTR_ERR("%s: Server Port allocation failed\n", __func__); |
| return NULL; |
| } |
| server_port->pdev = pdev; |
| server_port->server_addr.node_id = node_id; |
| server_port->server_addr.port_id = port_id; |
| server_port->xprt_info = xprt_info; |
| list_add_tail(&server_port->list, &server->server_port_list); |
| server->next_pdev_id++; |
| platform_device_add(server_port->pdev); |
| |
| return_server: |
| /* Add a reference so that the caller can put it back */ |
| kref_get(&server->ref); |
| up_write(&server_list_lock_lha2); |
| return server; |
| } |
| |
| /** |
| * ipc_router_destroy_server_nolock() - Remove server info from hash table |
| * @server: Server info to be removed. |
| * @node_id: Node/Processor ID in which the server is hosted. |
| * @port_id: Port ID within the node in which the server is hosted. |
| * |
| * This function removes the server_port identified using <node_id:port_id> |
| * from the server structure. If the server_port list under server structure |
| * is empty after removal, then remove the server structure from the server |
| * hash table. This function must be called with server_list_lock_lha2 locked. |
| */ |
| static void ipc_router_destroy_server_nolock(struct msm_ipc_server *server, |
| u32 node_id, u32 port_id) |
| { |
| struct msm_ipc_server_port *server_port; |
| bool server_port_found = false; |
| |
| if (!server) |
| return; |
| |
| list_for_each_entry(server_port, &server->server_port_list, list) { |
| if ((server_port->server_addr.node_id == node_id) && |
| (server_port->server_addr.port_id == port_id)) { |
| server_port_found = true; |
| break; |
| } |
| } |
| if (server_port_found && server_port) { |
| platform_device_unregister(server_port->pdev); |
| list_del(&server_port->list); |
| kfree(server_port); |
| } |
| if (list_empty(&server->server_port_list)) { |
| list_del(&server->list); |
| kref_put(&server->ref, ipc_router_release_server); |
| } |
| } |
| |
| /** |
| * ipc_router_destroy_server() - Remove server info from hash table |
| * @server: Server info to be removed. |
| * @node_id: Node/Processor ID in which the server is hosted. |
| * @port_id: Port ID within the node in which the server is hosted. |
| * |
| * This function removes the server_port identified using <node_id:port_id> |
| * from the server structure. If the server_port list under server structure |
| * is empty after removal, then remove the server structure from the server |
| * hash table. |
| */ |
| static void ipc_router_destroy_server(struct msm_ipc_server *server, |
| u32 node_id, u32 port_id) |
| { |
| down_write(&server_list_lock_lha2); |
| ipc_router_destroy_server_nolock(server, node_id, port_id); |
| up_write(&server_list_lock_lha2); |
| } |
| |
| static int ipc_router_send_ctl_msg( |
| struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg, |
| u32 dst_node_id) |
| { |
| struct rr_packet *pkt; |
| struct sk_buff *ipc_rtr_pkt; |
| struct rr_header_v1 *hdr; |
| int pkt_size; |
| void *data; |
| int ret = -EINVAL; |
| |
| pkt = create_pkt(NULL); |
| if (!pkt) { |
| IPC_RTR_ERR("%s: pkt alloc failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| pkt_size = IPC_ROUTER_HDR_SIZE + sizeof(*msg); |
| ipc_rtr_pkt = alloc_skb(pkt_size, GFP_KERNEL); |
| if (!ipc_rtr_pkt) { |
| IPC_RTR_ERR("%s: ipc_rtr_pkt alloc failed\n", __func__); |
| release_pkt(pkt); |
| return -ENOMEM; |
| } |
| |
| skb_reserve(ipc_rtr_pkt, IPC_ROUTER_HDR_SIZE); |
| data = skb_put(ipc_rtr_pkt, sizeof(*msg)); |
| memcpy(data, msg, sizeof(*msg)); |
| skb_queue_tail(pkt->pkt_fragment_q, ipc_rtr_pkt); |
| pkt->length = sizeof(*msg); |
| |
| hdr = &pkt->hdr; |
| hdr->version = IPC_ROUTER_V1; |
| hdr->type = msg->cmd; |
| hdr->src_node_id = IPC_ROUTER_NID_LOCAL; |
| hdr->src_port_id = IPC_ROUTER_ADDRESS; |
| hdr->control_flag = 0; |
| hdr->size = sizeof(*msg); |
| if (hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX || |
| (!xprt_info && dst_node_id == IPC_ROUTER_NID_LOCAL)) |
| hdr->dst_node_id = dst_node_id; |
| else if (xprt_info) |
| hdr->dst_node_id = xprt_info->remote_node_id; |
| hdr->dst_port_id = IPC_ROUTER_ADDRESS; |
| |
| if (dst_node_id == IPC_ROUTER_NID_LOCAL && |
| msg->cmd != IPC_ROUTER_CTRL_CMD_RESUME_TX) { |
| ipc_router_log_msg(local_log_ctx, IPC_ROUTER_LOG_EVENT_TX, msg, |
| hdr, NULL, NULL); |
| ret = post_control_ports(pkt); |
| } else if (dst_node_id == IPC_ROUTER_NID_LOCAL && |
| msg->cmd == IPC_ROUTER_CTRL_CMD_RESUME_TX) { |
| ipc_router_log_msg(local_log_ctx, IPC_ROUTER_LOG_EVENT_TX, msg, |
| hdr, NULL, NULL); |
| ret = process_resume_tx_msg(msg, pkt); |
| } else if (xprt_info && (msg->cmd == IPC_ROUTER_CTRL_CMD_HELLO || |
| xprt_info->initialized)) { |
| mutex_lock(&xprt_info->tx_lock_lhb2); |
| ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_TX, |
| msg, hdr, NULL, NULL); |
| ret = prepend_header(pkt, xprt_info); |
| if (ret < 0) { |
| mutex_unlock(&xprt_info->tx_lock_lhb2); |
| IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| release_pkt(pkt); |
| return ret; |
| } |
| |
| ret = xprt_info->xprt->write(pkt, pkt->length, xprt_info->xprt); |
| mutex_unlock(&xprt_info->tx_lock_lhb2); |
| } |
| |
| release_pkt(pkt); |
| return ret; |
| } |
| |
| static int |
| msm_ipc_router_send_server_list(u32 node_id, |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| union rr_control_msg ctl; |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| int i; |
| |
| if (!xprt_info || !xprt_info->initialized) { |
| IPC_RTR_ERR("%s: Xprt info not initialized\n", __func__); |
| return -EINVAL; |
| } |
| |
| memset(&ctl, 0, sizeof(ctl)); |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_NEW_SERVER; |
| |
| for (i = 0; i < SRV_HASH_SIZE; i++) { |
| list_for_each_entry(server, &server_list[i], list) { |
| ctl.srv.service = server->name.service; |
| ctl.srv.instance = server->name.instance; |
| list_for_each_entry(server_port, |
| &server->server_port_list, list) { |
| if (server_port->server_addr.node_id != |
| node_id) |
| continue; |
| |
| ctl.srv.node_id = |
| server_port->server_addr.node_id; |
| ctl.srv.port_id = |
| server_port->server_addr.port_id; |
| ipc_router_send_ctl_msg |
| (xprt_info, &ctl, |
| IPC_ROUTER_DUMMY_DEST_NODE); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int broadcast_ctl_msg_locally(union rr_control_msg *msg) |
| { |
| return ipc_router_send_ctl_msg(NULL, msg, IPC_ROUTER_NID_LOCAL); |
| } |
| |
| static int broadcast_ctl_msg(union rr_control_msg *ctl) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info; |
| |
| down_read(&xprt_info_list_lock_lha5); |
| list_for_each_entry(xprt_info, &xprt_info_list, list) { |
| ipc_router_send_ctl_msg(xprt_info, ctl, |
| IPC_ROUTER_DUMMY_DEST_NODE); |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| broadcast_ctl_msg_locally(ctl); |
| |
| return 0; |
| } |
| |
| static int relay_ctl_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *ctl) |
| { |
| struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| |
| if (!xprt_info || !ctl) |
| return -EINVAL; |
| |
| down_read(&xprt_info_list_lock_lha5); |
| list_for_each_entry(fwd_xprt_info, &xprt_info_list, list) { |
| if (xprt_info->xprt->link_id != fwd_xprt_info->xprt->link_id) |
| ipc_router_send_ctl_msg(fwd_xprt_info, ctl, |
| IPC_ROUTER_DUMMY_DEST_NODE); |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| |
| return 0; |
| } |
| |
| static int forward_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| struct rr_packet *pkt) |
| { |
| struct rr_header_v1 *hdr; |
| struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| int ret = 0; |
| int fwd_xprt_option; |
| |
| if (!xprt_info || !pkt) |
| return -EINVAL; |
| |
| hdr = &pkt->hdr; |
| rt_entry = ipc_router_get_rtentry_ref(hdr->dst_node_id); |
| if (!(rt_entry) || !(rt_entry->xprt_info)) { |
| IPC_RTR_ERR("%s: Routing table not initialized\n", __func__); |
| ret = -ENODEV; |
| goto fm_error1; |
| } |
| |
| down_read(&rt_entry->lock_lha4); |
| fwd_xprt_info = rt_entry->xprt_info; |
| ret = ipc_router_get_xprt_info_ref(fwd_xprt_info); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| goto fm_error_xprt; |
| } |
| ret = prepend_header(pkt, fwd_xprt_info); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| goto fm_error2; |
| } |
| fwd_xprt_option = fwd_xprt_info->xprt->get_option(fwd_xprt_info->xprt); |
| if (!(fwd_xprt_option & FRAG_PKT_WRITE_ENABLE)) { |
| ret = defragment_pkt(pkt); |
| if (ret < 0) |
| goto fm_error2; |
| } |
| |
| mutex_lock(&fwd_xprt_info->tx_lock_lhb2); |
| if (xprt_info->remote_node_id == fwd_xprt_info->remote_node_id) { |
| IPC_RTR_ERR("%s: Discarding Command to route back\n", __func__); |
| ret = -EINVAL; |
| goto fm_error3; |
| } |
| |
| if (xprt_info->xprt->link_id == fwd_xprt_info->xprt->link_id) { |
| IPC_RTR_ERR("%s: DST in the same cluster\n", __func__); |
| ret = 0; |
| goto fm_error3; |
| } |
| fwd_xprt_info->xprt->write(pkt, pkt->length, fwd_xprt_info->xprt); |
| IPC_RTR_INFO(fwd_xprt_info->log_ctx, |
| "%s %s Len:0x%x T:0x%x CF:0x%x SRC:<0x%x:0x%x> DST:<0x%x:0x%x>\n", |
| "FWD", "TX", hdr->size, hdr->type, hdr->control_flag, |
| hdr->src_node_id, hdr->src_port_id, |
| hdr->dst_node_id, hdr->dst_port_id); |
| |
| fm_error3: |
| mutex_unlock(&fwd_xprt_info->tx_lock_lhb2); |
| fm_error2: |
| ipc_router_put_xprt_info_ref(fwd_xprt_info); |
| fm_error_xprt: |
| up_read(&rt_entry->lock_lha4); |
| fm_error1: |
| if (rt_entry) |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| return ret; |
| } |
| |
| static int msm_ipc_router_send_remove_client(struct comm_mode_info *mode_info, |
| u32 node_id, u32 port_id) |
| { |
| union rr_control_msg msg; |
| struct msm_ipc_router_xprt_info *tmp_xprt_info; |
| int mode; |
| void *xprt_info; |
| int rc = 0; |
| |
| if (!mode_info) { |
| IPC_RTR_ERR("%s: NULL mode_info\n", __func__); |
| return -EINVAL; |
| } |
| mode = mode_info->mode; |
| xprt_info = mode_info->xprt_info; |
| |
| memset(&msg, 0, sizeof(msg)); |
| msg.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| msg.cli.node_id = node_id; |
| msg.cli.port_id = port_id; |
| |
| if ((mode == SINGLE_LINK_MODE) && xprt_info) { |
| down_read(&xprt_info_list_lock_lha5); |
| list_for_each_entry(tmp_xprt_info, &xprt_info_list, list) { |
| if (tmp_xprt_info != xprt_info) |
| continue; |
| ipc_router_send_ctl_msg(tmp_xprt_info, &msg, |
| IPC_ROUTER_DUMMY_DEST_NODE); |
| break; |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| } else if ((mode == SINGLE_LINK_MODE) && !xprt_info) { |
| broadcast_ctl_msg_locally(&msg); |
| } else if (mode == MULTI_LINK_MODE) { |
| broadcast_ctl_msg(&msg); |
| } else if (mode != NULL_MODE) { |
| IPC_RTR_ERR( |
| "%s: Invalid mode(%d) + xprt_inf(%p) for %08x:%08x\n", |
| __func__, mode, xprt_info, node_id, port_id); |
| rc = -EINVAL; |
| } |
| return rc; |
| } |
| |
| static void update_comm_mode_info(struct comm_mode_info *mode_info, |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| if (!mode_info) { |
| IPC_RTR_ERR("%s: NULL mode_info\n", __func__); |
| return; |
| } |
| |
| if (mode_info->mode == NULL_MODE) { |
| mode_info->xprt_info = xprt_info; |
| mode_info->mode = SINGLE_LINK_MODE; |
| } else if (mode_info->mode == SINGLE_LINK_MODE && |
| mode_info->xprt_info != xprt_info) { |
| mode_info->mode = MULTI_LINK_MODE; |
| } |
| } |
| |
| /** |
| * cleanup_rmt_server() - Cleanup server hosted in the remote port |
| * @xprt_info: XPRT through which this cleanup event is handled. |
| * @rport_ptr: Remote port that is being cleaned up. |
| * @server: Server that is hosted in the remote port. |
| */ |
| static void cleanup_rmt_server(struct msm_ipc_router_xprt_info *xprt_info, |
| struct msm_ipc_router_remote_port *rport_ptr, |
| struct msm_ipc_server *server) |
| { |
| union rr_control_msg ctl; |
| |
| memset(&ctl, 0, sizeof(ctl)); |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| ctl.srv.service = server->name.service; |
| ctl.srv.instance = server->name.instance; |
| ctl.srv.node_id = rport_ptr->node_id; |
| ctl.srv.port_id = rport_ptr->port_id; |
| if (xprt_info) |
| relay_ctl_msg(xprt_info, &ctl); |
| broadcast_ctl_msg_locally(&ctl); |
| ipc_router_destroy_server_nolock(server, rport_ptr->node_id, |
| rport_ptr->port_id); |
| } |
| |
| static void cleanup_rmt_ports(struct msm_ipc_router_xprt_info *xprt_info, |
| struct msm_ipc_routing_table_entry *rt_entry) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr, *tmp_rport_ptr; |
| struct msm_ipc_server *server; |
| union rr_control_msg ctl; |
| int j; |
| |
| memset(&ctl, 0, sizeof(ctl)); |
| for (j = 0; j < RP_HASH_SIZE; j++) { |
| list_for_each_entry_safe(rport_ptr, tmp_rport_ptr, |
| &rt_entry->remote_port_list[j], list) { |
| list_del(&rport_ptr->list); |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| server = rport_ptr->server; |
| rport_ptr->server = NULL; |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| ipc_router_reset_conn(rport_ptr); |
| if (server) { |
| cleanup_rmt_server(xprt_info, rport_ptr, |
| server); |
| server = NULL; |
| } |
| |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| ctl.cli.node_id = rport_ptr->node_id; |
| ctl.cli.port_id = rport_ptr->port_id; |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| |
| relay_ctl_msg(xprt_info, &ctl); |
| broadcast_ctl_msg_locally(&ctl); |
| } |
| } |
| } |
| |
| static void msm_ipc_cleanup_routing_table( |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| int i; |
| struct msm_ipc_routing_table_entry *rt_entry, *tmp_rt_entry; |
| |
| if (!xprt_info) { |
| IPC_RTR_ERR("%s: Invalid xprt_info\n", __func__); |
| return; |
| } |
| |
| down_write(&server_list_lock_lha2); |
| down_write(&routing_table_lock_lha3); |
| for (i = 0; i < RT_HASH_SIZE; i++) { |
| list_for_each_entry_safe(rt_entry, tmp_rt_entry, |
| &routing_table[i], list) { |
| down_write(&rt_entry->lock_lha4); |
| if (rt_entry->xprt_info != xprt_info) { |
| up_write(&rt_entry->lock_lha4); |
| continue; |
| } |
| cleanup_rmt_ports(xprt_info, rt_entry); |
| rt_entry->xprt_info = NULL; |
| up_write(&rt_entry->lock_lha4); |
| list_del(&rt_entry->list); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| } |
| } |
| up_write(&routing_table_lock_lha3); |
| up_write(&server_list_lock_lha2); |
| } |
| |
| /** |
| * sync_sec_rule() - Synchrnoize the security rule into the server structure |
| * @server: Server structure where the rule has to be synchronized. |
| * @rule: Security tule to be synchronized. |
| * |
| * This function is used to update the server structure with the security |
| * rule configured for the <service:instance> corresponding to that server. |
| */ |
| static void sync_sec_rule(struct msm_ipc_server *server, void *rule) |
| { |
| struct msm_ipc_server_port *server_port; |
| struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| |
| list_for_each_entry(server_port, &server->server_port_list, list) { |
| rport_ptr = ipc_router_get_rport_ref( |
| server_port->server_addr.node_id, |
| server_port->server_addr.port_id); |
| if (!rport_ptr) |
| continue; |
| rport_ptr->sec_rule = rule; |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| } |
| server->synced_sec_rule = 1; |
| } |
| |
| /** |
| * msm_ipc_sync_sec_rule() - Sync the security rule to the service |
| * @service: Service for which the rule has to be synchronized. |
| * @instance: Instance for which the rule has to be synchronized. |
| * @rule: Security rule to be synchronized. |
| * |
| * This function is used to syncrhonize the security rule with the server |
| * hash table, if the user-space script configures the rule after the service |
| * has come up. This function is used to synchronize the security rule to a |
| * specific service and optionally a specific instance. |
| */ |
| void msm_ipc_sync_sec_rule(u32 service, u32 instance, void *rule) |
| { |
| int key = (service & (SRV_HASH_SIZE - 1)); |
| struct msm_ipc_server *server; |
| |
| down_write(&server_list_lock_lha2); |
| list_for_each_entry(server, &server_list[key], list) { |
| if (server->name.service != service) |
| continue; |
| |
| if (server->name.instance != instance && |
| instance != ALL_INSTANCE) |
| continue; |
| |
| /* If the rule applies to all instances and if the specific |
| * instance of a service has a rule synchronized already, |
| * do not apply the rule for that specific instance. |
| */ |
| if (instance == ALL_INSTANCE && server->synced_sec_rule) |
| continue; |
| |
| sync_sec_rule(server, rule); |
| } |
| up_write(&server_list_lock_lha2); |
| } |
| |
| /** |
| * msm_ipc_sync_default_sec_rule() - Default security rule to all services |
| * @rule: Security rule to be synchronized. |
| * |
| * This function is used to syncrhonize the security rule with the server |
| * hash table, if the user-space script configures the rule after the service |
| * has come up. This function is used to synchronize the security rule that |
| * applies to all services, if the concerned service do not have any rule |
| * defined. |
| */ |
| void msm_ipc_sync_default_sec_rule(void *rule) |
| { |
| int key; |
| struct msm_ipc_server *server; |
| |
| down_write(&server_list_lock_lha2); |
| for (key = 0; key < SRV_HASH_SIZE; key++) { |
| list_for_each_entry(server, &server_list[key], list) { |
| if (server->synced_sec_rule) |
| continue; |
| |
| sync_sec_rule(server, rule); |
| } |
| } |
| up_write(&server_list_lock_lha2); |
| } |
| |
| /** |
| * ipc_router_reset_conn() - Reset the connection to remote port |
| * @rport_ptr: Pointer to the remote port to be disconnected. |
| * |
| * This function is used to reset all the local ports that are connected to |
| * the remote port being passed. |
| */ |
| static void ipc_router_reset_conn(struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| struct msm_ipc_port *port_ptr; |
| struct ipc_router_conn_info *conn_info, *tmp_conn_info; |
| |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| list_for_each_entry_safe(conn_info, tmp_conn_info, |
| &rport_ptr->conn_info_list, list) { |
| port_ptr = ipc_router_get_port_ref(conn_info->port_id); |
| if (port_ptr) { |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| port_ptr->conn_status = CONNECTION_RESET; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| wake_up(&port_ptr->port_rx_wait_q); |
| kref_put(&port_ptr->ref, ipc_router_release_port); |
| } |
| |
| list_del(&conn_info->list); |
| kfree(conn_info); |
| } |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| } |
| |
| /** |
| * ipc_router_set_conn() - Set the connection by initializing dest address |
| * @port_ptr: Local port in which the connection has to be set. |
| * @addr: Destination address of the connection. |
| * |
| * @return: 0 on success, standard Linux error codes on failure. |
| */ |
| int ipc_router_set_conn(struct msm_ipc_port *port_ptr, |
| struct msm_ipc_addr *addr) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr; |
| struct ipc_router_conn_info *conn_info; |
| |
| if (unlikely(!port_ptr || !addr)) |
| return -EINVAL; |
| |
| if (addr->addrtype != MSM_IPC_ADDR_ID) { |
| IPC_RTR_ERR("%s: Invalid Address type\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (port_ptr->type == SERVER_PORT) { |
| IPC_RTR_ERR("%s: Connection refused on a server port\n", |
| __func__); |
| return -ECONNREFUSED; |
| } |
| |
| if (port_ptr->conn_status == CONNECTED) { |
| IPC_RTR_ERR("%s: Port %08x already connected\n", |
| __func__, port_ptr->this_port.port_id); |
| return -EISCONN; |
| } |
| |
| conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); |
| if (!conn_info) { |
| IPC_RTR_ERR("%s: Error allocating conn_info\n", __func__); |
| return -ENOMEM; |
| } |
| INIT_LIST_HEAD(&conn_info->list); |
| conn_info->port_id = port_ptr->this_port.port_id; |
| |
| rport_ptr = ipc_router_get_rport_ref(addr->addr.port_addr.node_id, |
| addr->addr.port_addr.port_id); |
| if (!rport_ptr) { |
| IPC_RTR_ERR("%s: Invalid remote endpoint\n", __func__); |
| kfree(conn_info); |
| return -ENODEV; |
| } |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| list_add_tail(&conn_info->list, &rport_ptr->conn_info_list); |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| memcpy(&port_ptr->dest_addr, &addr->addr.port_addr, |
| sizeof(struct msm_ipc_port_addr)); |
| port_ptr->conn_status = CONNECTED; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| return 0; |
| } |
| |
| /** |
| * do_version_negotiation() - perform a version negotiation and set the version |
| * @xprt_info: Pointer to the IPC Router transport info structure. |
| * @msg: Pointer to the IPC Router HELLO message. |
| * |
| * This function performs the version negotiation by verifying the computed |
| * checksum first. If the checksum matches with the magic number, it sets the |
| * negotiated IPC Router version in transport. |
| */ |
| static void do_version_negotiation(struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg) |
| { |
| u32 magic; |
| unsigned int version; |
| |
| if (!xprt_info) |
| return; |
| magic = ipc_router_calc_checksum(msg); |
| if (magic == IPC_ROUTER_HELLO_MAGIC) { |
| version = fls(msg->hello.versions & IPC_ROUTER_VER_BITMASK) - 1; |
| /*Bit 0 & 31 are reserved for future usage*/ |
| if ((version > 0) && |
| (version != (sizeof(version) * BITS_PER_BYTE - 1)) && |
| xprt_info->xprt->set_version) |
| xprt_info->xprt->set_version(xprt_info->xprt, version); |
| } |
| } |
| |
| static int send_hello_msg(struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| int rc = 0; |
| union rr_control_msg ctl; |
| |
| if (!xprt_info->hello_sent) { |
| xprt_info->hello_sent = 1; |
| /* Send a HELLO message */ |
| memset(&ctl, 0, sizeof(ctl)); |
| ctl.hello.cmd = IPC_ROUTER_CTRL_CMD_HELLO; |
| ctl.hello.checksum = IPC_ROUTER_HELLO_MAGIC; |
| ctl.hello.versions = (uint32_t)IPC_ROUTER_VER_BITMASK; |
| ctl.hello.checksum = ipc_router_calc_checksum(&ctl); |
| rc = ipc_router_send_ctl_msg(xprt_info, &ctl, |
| IPC_ROUTER_DUMMY_DEST_NODE); |
| if (rc < 0) { |
| xprt_info->hello_sent = 0; |
| IPC_RTR_ERR("%s: Error sending HELLO message\n", |
| __func__); |
| return rc; |
| } |
| } |
| return rc; |
| } |
| |
| static int process_hello_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg, |
| struct rr_header_v1 *hdr) |
| { |
| int i, rc = 0; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| if (!hdr) |
| return -EINVAL; |
| |
| xprt_info->remote_node_id = hdr->src_node_id; |
| rt_entry = create_routing_table_entry(hdr->src_node_id, xprt_info); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: rt_entry allocation failed\n", __func__); |
| return -ENOMEM; |
| } |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| |
| do_version_negotiation(xprt_info, msg); |
| rc = send_hello_msg(xprt_info); |
| if (rc < 0) |
| return rc; |
| |
| xprt_info->initialized = 1; |
| |
| /* Send list of servers from the local node and from nodes |
| * outside the mesh network in which this XPRT is part of. |
| */ |
| down_read(&server_list_lock_lha2); |
| down_read(&routing_table_lock_lha3); |
| for (i = 0; i < RT_HASH_SIZE; i++) { |
| list_for_each_entry(rt_entry, &routing_table[i], list) { |
| if ((rt_entry->node_id != IPC_ROUTER_NID_LOCAL) && |
| (!rt_entry->xprt_info || |
| (rt_entry->xprt_info->xprt->link_id == |
| xprt_info->xprt->link_id))) |
| continue; |
| rc = msm_ipc_router_send_server_list(rt_entry->node_id, |
| xprt_info); |
| if (rc < 0) { |
| up_read(&routing_table_lock_lha3); |
| up_read(&server_list_lock_lha2); |
| return rc; |
| } |
| } |
| } |
| up_read(&routing_table_lock_lha3); |
| up_read(&server_list_lock_lha2); |
| return rc; |
| } |
| |
| static int process_resume_tx_msg(union rr_control_msg *msg, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| rport_ptr = ipc_router_get_rport_ref(msg->cli.node_id, |
| msg->cli.port_id); |
| if (!rport_ptr) { |
| IPC_RTR_ERR("%s: Unable to resume client\n", __func__); |
| return -ENODEV; |
| } |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| rport_ptr->tx_quota_cnt = 0; |
| post_resume_tx(rport_ptr, pkt, msg); |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| return 0; |
| } |
| |
| static int process_new_server_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_routing_table_entry *rt_entry; |
| struct msm_ipc_server *server; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| if (msg->srv.instance == 0) { |
| IPC_RTR_ERR("%s: Server %08x create rejected, version = 0\n", |
| __func__, msg->srv.service); |
| return -EINVAL; |
| } |
| |
| rt_entry = ipc_router_get_rtentry_ref(msg->srv.node_id); |
| if (!rt_entry) { |
| rt_entry = create_routing_table_entry(msg->srv.node_id, |
| xprt_info); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: rt_entry allocation failed\n", |
| __func__); |
| return -ENOMEM; |
| } |
| } |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| |
| /* If the service already exists in the table, create_server returns |
| * a reference to it. |
| */ |
| rport_ptr = ipc_router_create_rport(msg->srv.node_id, |
| msg->srv.port_id, xprt_info); |
| if (!rport_ptr) |
| return -ENOMEM; |
| |
| server = msm_ipc_router_create_server( |
| msg->srv.service, msg->srv.instance, |
| msg->srv.node_id, msg->srv.port_id, xprt_info); |
| if (!server) { |
| IPC_RTR_ERR("%s: Server %08x:%08x Create failed\n", |
| __func__, msg->srv.service, msg->srv.instance); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| ipc_router_destroy_rport(rport_ptr); |
| return -ENOMEM; |
| } |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| rport_ptr->server = server; |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| rport_ptr->sec_rule = msm_ipc_get_security_rule( |
| msg->srv.service, msg->srv.instance); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| kref_put(&server->ref, ipc_router_release_server); |
| |
| /* Relay the new server message to other subsystems that do not belong |
| * to the cluster from which this message is received. Notify the |
| * local clients waiting for this service. |
| */ |
| relay_ctl_msg(xprt_info, msg); |
| post_control_ports(pkt); |
| return 0; |
| } |
| |
| static int process_rmv_server_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_server *server; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| server = ipc_router_get_server_ref(msg->srv.service, msg->srv.instance, |
| msg->srv.node_id, msg->srv.port_id); |
| rport_ptr = ipc_router_get_rport_ref(msg->srv.node_id, |
| msg->srv.port_id); |
| if (rport_ptr) { |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| if (rport_ptr->server == server) |
| rport_ptr->server = NULL; |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| } |
| |
| if (server) { |
| kref_put(&server->ref, ipc_router_release_server); |
| ipc_router_destroy_server(server, msg->srv.node_id, |
| msg->srv.port_id); |
| /* Relay the new server message to other subsystems that do not |
| * belong to the cluster from which this message is received. |
| * Notify the local clients communicating with the service. |
| */ |
| relay_ctl_msg(xprt_info, msg); |
| post_control_ports(pkt); |
| } |
| return 0; |
| } |
| |
| static int process_rmv_client_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_router_remote_port *rport_ptr; |
| struct msm_ipc_server *server; |
| |
| rport_ptr = ipc_router_get_rport_ref(msg->cli.node_id, |
| msg->cli.port_id); |
| if (rport_ptr) { |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| server = rport_ptr->server; |
| rport_ptr->server = NULL; |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| ipc_router_reset_conn(rport_ptr); |
| down_write(&server_list_lock_lha2); |
| if (server) |
| cleanup_rmt_server(NULL, rport_ptr, server); |
| up_write(&server_list_lock_lha2); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| ipc_router_destroy_rport(rport_ptr); |
| } |
| |
| relay_ctl_msg(xprt_info, msg); |
| post_control_ports(pkt); |
| return 0; |
| } |
| |
| static int process_control_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| struct rr_packet *pkt) |
| { |
| union rr_control_msg *msg; |
| int rc = 0; |
| struct rr_header_v1 *hdr; |
| |
| if (pkt->length != sizeof(*msg)) { |
| IPC_RTR_ERR("%s: r2r msg size %d != %zu\n", __func__, |
| pkt->length, sizeof(*msg)); |
| return -EINVAL; |
| } |
| |
| hdr = &pkt->hdr; |
| msg = msm_ipc_router_skb_to_buf(pkt->pkt_fragment_q, sizeof(*msg)); |
| if (!msg) { |
| IPC_RTR_ERR("%s: Error extracting control msg\n", __func__); |
| return -ENOMEM; |
| } |
| |
| ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_RX, msg, |
| hdr, NULL, NULL); |
| |
| switch (msg->cmd) { |
| case IPC_ROUTER_CTRL_CMD_HELLO: |
| rc = process_hello_msg(xprt_info, msg, hdr); |
| break; |
| case IPC_ROUTER_CTRL_CMD_RESUME_TX: |
| rc = process_resume_tx_msg(msg, pkt); |
| break; |
| case IPC_ROUTER_CTRL_CMD_NEW_SERVER: |
| rc = process_new_server_msg(xprt_info, msg, pkt); |
| break; |
| case IPC_ROUTER_CTRL_CMD_REMOVE_SERVER: |
| rc = process_rmv_server_msg(xprt_info, msg, pkt); |
| break; |
| case IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT: |
| rc = process_rmv_client_msg(xprt_info, msg, pkt); |
| break; |
| default: |
| rc = -EINVAL; |
| } |
| kfree(msg); |
| return rc; |
| } |
| |
| static void do_read_data(struct kthread_work *work) |
| { |
| struct rr_header_v1 *hdr; |
| struct rr_packet *pkt = NULL; |
| struct msm_ipc_port *port_ptr; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| struct msm_ipc_router_xprt_info *xprt_info = |
| container_of(work, |
| struct msm_ipc_router_xprt_info, |
| read_data); |
| |
| while ((pkt = rr_read(xprt_info)) != NULL) { |
| |
| hdr = &pkt->hdr; |
| |
| if ((hdr->dst_node_id != IPC_ROUTER_NID_LOCAL) && |
| ((hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX) || |
| (hdr->type == IPC_ROUTER_CTRL_CMD_DATA))) { |
| IPC_RTR_INFO(xprt_info->log_ctx, |
| "%s %s Len:0x%x T:0x%x CF:0x%x SRC:<0x%x:0x%x> DST:<0x%x:0x%x>\n", |
| "FWD", "RX", hdr->size, hdr->type, |
| hdr->control_flag, hdr->src_node_id, |
| hdr->src_port_id, hdr->dst_node_id, |
| hdr->dst_port_id); |
| /** |
| * update forwarding port information as well in routing |
| * table which will help to cleanup clients/services |
| * running in modem when MSM goes down |
| */ |
| rport_ptr = ipc_router_get_rport_ref(hdr->src_node_id, |
| hdr->src_port_id); |
| if (!rport_ptr) { |
| rport_ptr = |
| ipc_router_create_rport(hdr->src_node_id, |
| hdr->src_port_id, |
| xprt_info); |
| if (!rport_ptr) { |
| IPC_RTR_ERR( |
| "%s: Rmt Prt %08x:%08x create failed\n", |
| __func__, hdr->src_node_id, |
| hdr->src_port_id); |
| } |
| } |
| /** |
| * just to fail safe check is added, if rport |
| * allocation failed above we still forward the |
| * packet to remote. |
| */ |
| if (rport_ptr) |
| kref_put(&rport_ptr->ref, |
| ipc_router_release_rport); |
| forward_msg(xprt_info, pkt); |
| goto read_next_pkt1; |
| } |
| |
| if (hdr->type != IPC_ROUTER_CTRL_CMD_DATA) { |
| process_control_msg(xprt_info, pkt); |
| goto read_next_pkt1; |
| } |
| |
| port_ptr = ipc_router_get_port_ref(hdr->dst_port_id); |
| if (!port_ptr) { |
| IPC_RTR_ERR("%s: No local port id %08x\n", __func__, |
| hdr->dst_port_id); |
| goto read_next_pkt1; |
| } |
| |
| rport_ptr = ipc_router_get_rport_ref(hdr->src_node_id, |
| hdr->src_port_id); |
| if (!rport_ptr) { |
| rport_ptr = ipc_router_create_rport(hdr->src_node_id, |
| hdr->src_port_id, |
| xprt_info); |
| if (!rport_ptr) { |
| IPC_RTR_ERR( |
| "%s: Rmt Prt %08x:%08x create failed\n", |
| __func__, hdr->src_node_id, |
| hdr->src_port_id); |
| goto read_next_pkt2; |
| } |
| } |
| |
| ipc_router_log_msg(xprt_info->log_ctx, IPC_ROUTER_LOG_EVENT_RX, |
| pkt, hdr, port_ptr, rport_ptr); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| post_pkt_to_port(port_ptr, pkt, 0); |
| kref_put(&port_ptr->ref, ipc_router_release_port); |
| continue; |
| read_next_pkt2: |
| kref_put(&port_ptr->ref, ipc_router_release_port); |
| read_next_pkt1: |
| release_pkt(pkt); |
| } |
| } |
| |
| int msm_ipc_router_register_server(struct msm_ipc_port *port_ptr, |
| struct msm_ipc_addr *name) |
| { |
| struct msm_ipc_server *server; |
| union rr_control_msg ctl; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| if (!port_ptr || !name) |
| return -EINVAL; |
| |
| if (port_ptr->type != CLIENT_PORT) |
| return -EINVAL; |
| |
| if (name->addrtype != MSM_IPC_ADDR_NAME) |
| return -EINVAL; |
| |
| rport_ptr = ipc_router_create_rport(IPC_ROUTER_NID_LOCAL, |
| port_ptr->this_port.port_id, NULL); |
| if (!rport_ptr) { |
| IPC_RTR_ERR("%s: RPort %08x:%08x creation failed\n", __func__, |
| IPC_ROUTER_NID_LOCAL, port_ptr->this_port.port_id); |
| return -ENOMEM; |
| } |
| |
| server = msm_ipc_router_create_server(name->addr.port_name.service, |
| name->addr.port_name.instance, |
| IPC_ROUTER_NID_LOCAL, |
| port_ptr->this_port.port_id, |
| NULL); |
| if (!server) { |
| IPC_RTR_ERR("%s: Server %08x:%08x Create failed\n", |
| __func__, name->addr.port_name.service, |
| name->addr.port_name.instance); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| ipc_router_destroy_rport(rport_ptr); |
| return -ENOMEM; |
| } |
| |
| memset(&ctl, 0, sizeof(ctl)); |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_NEW_SERVER; |
| ctl.srv.service = server->name.service; |
| ctl.srv.instance = server->name.instance; |
| ctl.srv.node_id = IPC_ROUTER_NID_LOCAL; |
| ctl.srv.port_id = port_ptr->this_port.port_id; |
| broadcast_ctl_msg(&ctl); |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| port_ptr->type = SERVER_PORT; |
| port_ptr->mode_info.mode = MULTI_LINK_MODE; |
| port_ptr->port_name.service = server->name.service; |
| port_ptr->port_name.instance = server->name.instance; |
| port_ptr->rport_info = rport_ptr; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| kref_put(&server->ref, ipc_router_release_server); |
| return 0; |
| } |
| |
| int msm_ipc_router_unregister_server(struct msm_ipc_port *port_ptr) |
| { |
| struct msm_ipc_server *server; |
| union rr_control_msg ctl; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| if (!port_ptr) |
| return -EINVAL; |
| |
| if (port_ptr->type != SERVER_PORT) { |
| IPC_RTR_ERR("%s: Trying to unregister a non-server port\n", |
| __func__); |
| return -EINVAL; |
| } |
| |
| if (port_ptr->this_port.node_id != IPC_ROUTER_NID_LOCAL) { |
| IPC_RTR_ERR( |
| "%s: Trying to unregister a remote server locally\n", |
| __func__); |
| return -EINVAL; |
| } |
| |
| server = ipc_router_get_server_ref(port_ptr->port_name.service, |
| port_ptr->port_name.instance, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| if (!server) { |
| IPC_RTR_ERR("%s: Server lookup failed\n", __func__); |
| return -ENODEV; |
| } |
| |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| port_ptr->type = CLIENT_PORT; |
| rport_ptr = (struct msm_ipc_router_remote_port *)port_ptr->rport_info; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| if (rport_ptr) |
| ipc_router_reset_conn(rport_ptr); |
| memset(&ctl, 0, sizeof(ctl)); |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| ctl.srv.service = server->name.service; |
| ctl.srv.instance = server->name.instance; |
| ctl.srv.node_id = IPC_ROUTER_NID_LOCAL; |
| ctl.srv.port_id = port_ptr->this_port.port_id; |
| kref_put(&server->ref, ipc_router_release_server); |
| ipc_router_destroy_server(server, port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| broadcast_ctl_msg(&ctl); |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| port_ptr->type = CLIENT_PORT; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| return 0; |
| } |
| |
| static int loopback_data(struct msm_ipc_port *src, |
| u32 port_id, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_port *port_ptr; |
| struct sk_buff *temp_skb; |
| int align_size; |
| |
| if (!pkt) { |
| IPC_RTR_ERR("%s: Invalid pkt pointer\n", __func__); |
| return -EINVAL; |
| } |
| |
| temp_skb = skb_peek_tail(pkt->pkt_fragment_q); |
| if (!temp_skb) { |
| IPC_RTR_ERR("%s: Empty skb\n", __func__); |
| return -EINVAL; |
| } |
| align_size = ALIGN_SIZE(pkt->length); |
| skb_put(temp_skb, align_size); |
| pkt->length += align_size; |
| |
| port_ptr = ipc_router_get_port_ref(port_id); |
| if (!port_ptr) { |
| IPC_RTR_ERR("%s: Local port %d not present\n", __func__, |
| port_id); |
| return -ENODEV; |
| } |
| post_pkt_to_port(port_ptr, pkt, 1); |
| update_comm_mode_info(&src->mode_info, NULL); |
| kref_put(&port_ptr->ref, ipc_router_release_port); |
| |
| return pkt->hdr.size; |
| } |
| |
| static int ipc_router_tx_wait(struct msm_ipc_port *src, |
| struct msm_ipc_router_remote_port *rport_ptr, |
| u32 *set_confirm_rx, |
| long timeout) |
| { |
| struct msm_ipc_resume_tx_port *resume_tx_port; |
| int ret; |
| |
| if (unlikely(!src || !rport_ptr)) |
| return -EINVAL; |
| |
| for (;;) { |
| mutex_lock(&rport_ptr->rport_lock_lhb2); |
| if (rport_ptr->status == RESET) { |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| IPC_RTR_ERR("%s: RPort %08x:%08x is in reset state\n", |
| __func__, rport_ptr->node_id, |
| rport_ptr->port_id); |
| return -ENETRESET; |
| } |
| |
| if (rport_ptr->tx_quota_cnt < IPC_ROUTER_HIGH_RX_QUOTA) |
| break; |
| |
| if (msm_ipc_router_lookup_resume_tx_port( |
| rport_ptr, src->this_port.port_id)) |
| goto check_timeo; |
| |
| resume_tx_port = |
| kzalloc(sizeof(struct msm_ipc_resume_tx_port), |
| GFP_KERNEL); |
| if (!resume_tx_port) { |
| IPC_RTR_ERR("%s: Resume_Tx port allocation failed\n", |
| __func__); |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| return -ENOMEM; |
| } |
| INIT_LIST_HEAD(&resume_tx_port->list); |
| resume_tx_port->port_id = src->this_port.port_id; |
| resume_tx_port->node_id = src->this_port.node_id; |
| list_add_tail(&resume_tx_port->list, |
| &rport_ptr->resume_tx_port_list); |
| check_timeo: |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| if (!timeout) { |
| return -EAGAIN; |
| } else if (timeout < 0) { |
| ret = |
| wait_event_interruptible(src->port_tx_wait_q, |
| (rport_ptr->tx_quota_cnt != |
| IPC_ROUTER_HIGH_RX_QUOTA || |
| rport_ptr->status == RESET)); |
| if (ret) |
| return ret; |
| } else { |
| ret = wait_event_interruptible_timeout( |
| src->port_tx_wait_q, |
| (rport_ptr->tx_quota_cnt != |
| IPC_ROUTER_HIGH_RX_QUOTA || |
| rport_ptr->status == RESET), |
| msecs_to_jiffies(timeout)); |
| if (ret < 0) { |
| return ret; |
| } else if (ret == 0) { |
| IPC_RTR_ERR("%s: Resume_tx Timeout %08x:%08x\n", |
| __func__, rport_ptr->node_id, |
| rport_ptr->port_id); |
| return -ETIMEDOUT; |
| } |
| } |
| } |
| rport_ptr->tx_quota_cnt++; |
| if (rport_ptr->tx_quota_cnt == IPC_ROUTER_LOW_RX_QUOTA) |
| *set_confirm_rx = 1; |
| mutex_unlock(&rport_ptr->rport_lock_lhb2); |
| return 0; |
| } |
| |
| static int |
| msm_ipc_router_write_pkt(struct msm_ipc_port *src, |
| struct msm_ipc_router_remote_port *rport_ptr, |
| struct rr_packet *pkt, long timeout) |
| { |
| struct rr_header_v1 *hdr; |
| struct msm_ipc_router_xprt_info *xprt_info; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| struct sk_buff *temp_skb; |
| int xprt_option; |
| int ret; |
| int align_size; |
| u32 set_confirm_rx = 0; |
| |
| if (!rport_ptr || !src || !pkt) |
| return -EINVAL; |
| |
| hdr = &pkt->hdr; |
| hdr->version = IPC_ROUTER_V1; |
| hdr->type = IPC_ROUTER_CTRL_CMD_DATA; |
| hdr->src_node_id = src->this_port.node_id; |
| hdr->src_port_id = src->this_port.port_id; |
| hdr->size = pkt->length; |
| hdr->control_flag = 0; |
| hdr->dst_node_id = rport_ptr->node_id; |
| hdr->dst_port_id = rport_ptr->port_id; |
| |
| ret = ipc_router_tx_wait(src, rport_ptr, &set_confirm_rx, timeout); |
| if (ret < 0) |
| return ret; |
| if (set_confirm_rx) |
| hdr->control_flag |= CONTROL_FLAG_CONFIRM_RX; |
| |
| if (hdr->dst_node_id == IPC_ROUTER_NID_LOCAL) { |
| ipc_router_log_msg(local_log_ctx, |
| IPC_ROUTER_LOG_EVENT_TX, pkt, hdr, src, |
| rport_ptr); |
| ret = loopback_data(src, hdr->dst_port_id, pkt); |
| return ret; |
| } |
| |
| rt_entry = ipc_router_get_rtentry_ref(hdr->dst_node_id); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: Remote node %d not up\n", |
| __func__, hdr->dst_node_id); |
| return -ENODEV; |
| } |
| down_read(&rt_entry->lock_lha4); |
| xprt_info = rt_entry->xprt_info; |
| ret = ipc_router_get_xprt_info_ref(xprt_info); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| up_read(&rt_entry->lock_lha4); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| return ret; |
| } |
| ret = prepend_header(pkt, xprt_info); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Prepend Header failed\n", __func__); |
| goto out_write_pkt; |
| } |
| xprt_option = xprt_info->xprt->get_option(xprt_info->xprt); |
| if (!(xprt_option & FRAG_PKT_WRITE_ENABLE)) { |
| ret = defragment_pkt(pkt); |
| if (ret < 0) |
| goto out_write_pkt; |
| } |
| |
| temp_skb = skb_peek_tail(pkt->pkt_fragment_q); |
| if (!temp_skb) { |
| IPC_RTR_ERR("%s: Abort invalid pkt\n", __func__); |
| ret = -EINVAL; |
| goto out_write_pkt; |
| } |
| align_size = ALIGN_SIZE(pkt->length); |
| skb_put(temp_skb, align_size); |
| pkt->length += align_size; |
| mutex_lock(&xprt_info->tx_lock_lhb2); |
| ret = xprt_info->xprt->write(pkt, pkt->length, xprt_info->xprt); |
| mutex_unlock(&xprt_info->tx_lock_lhb2); |
| out_write_pkt: |
| up_read(&rt_entry->lock_lha4); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Write on XPRT failed\n", __func__); |
| ipc_router_log_msg(xprt_info->log_ctx, |
| IPC_ROUTER_LOG_EVENT_TX_ERR, pkt, hdr, src, |
| rport_ptr); |
| |
| ipc_router_put_xprt_info_ref(xprt_info); |
| return ret; |
| } |
| update_comm_mode_info(&src->mode_info, xprt_info); |
| ipc_router_log_msg(xprt_info->log_ctx, |
| IPC_ROUTER_LOG_EVENT_TX, pkt, hdr, src, rport_ptr); |
| |
| ipc_router_put_xprt_info_ref(xprt_info); |
| return hdr->size; |
| } |
| |
| int msm_ipc_router_send_to(struct msm_ipc_port *src, |
| struct sk_buff_head *data, |
| struct msm_ipc_addr *dest, |
| long timeout) |
| { |
| u32 dst_node_id = 0, dst_port_id = 0; |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| struct msm_ipc_router_remote_port *src_rport_ptr = NULL; |
| struct rr_packet *pkt; |
| int ret; |
| |
| if (!src || !data || !dest) { |
| IPC_RTR_ERR("%s: Invalid Parameters\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* Resolve Address*/ |
| if (dest->addrtype == MSM_IPC_ADDR_ID) { |
| dst_node_id = dest->addr.port_addr.node_id; |
| dst_port_id = dest->addr.port_addr.port_id; |
| } else if (dest->addrtype == MSM_IPC_ADDR_NAME) { |
| server = |
| ipc_router_get_server_ref(dest->addr.port_name.service, |
| dest->addr.port_name.instance, |
| 0, 0); |
| if (!server) { |
| IPC_RTR_ERR("%s: Destination not reachable\n", |
| __func__); |
| return -ENODEV; |
| } |
| server_port = list_first_entry(&server->server_port_list, |
| struct msm_ipc_server_port, |
| list); |
| dst_node_id = server_port->server_addr.node_id; |
| dst_port_id = server_port->server_addr.port_id; |
| kref_put(&server->ref, ipc_router_release_server); |
| } |
| |
| rport_ptr = ipc_router_get_rport_ref(dst_node_id, dst_port_id); |
| if (!rport_ptr) { |
| IPC_RTR_ERR("%s: Remote port not found\n", __func__); |
| return -ENODEV; |
| } |
| |
| if (src->check_send_permissions) { |
| ret = src->check_send_permissions(rport_ptr->sec_rule); |
| if (ret <= 0) { |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| IPC_RTR_ERR("%s: permission failure for %s\n", |
| __func__, current->comm); |
| return -EPERM; |
| } |
| } |
| |
| if (dst_node_id == IPC_ROUTER_NID_LOCAL && !src->rport_info) { |
| src_rport_ptr = ipc_router_create_rport(IPC_ROUTER_NID_LOCAL, |
| src->this_port.port_id, |
| NULL); |
| if (!src_rport_ptr) { |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| IPC_RTR_ERR("%s: RPort creation failed\n", __func__); |
| return -ENOMEM; |
| } |
| mutex_lock(&src->port_lock_lhc3); |
| src->rport_info = src_rport_ptr; |
| mutex_unlock(&src->port_lock_lhc3); |
| kref_put(&src_rport_ptr->ref, ipc_router_release_rport); |
| } |
| |
| pkt = create_pkt(data); |
| if (!pkt) { |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| IPC_RTR_ERR("%s: Pkt creation failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| ret = msm_ipc_router_write_pkt(src, rport_ptr, pkt, timeout); |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| if (ret < 0) |
| pkt->pkt_fragment_q = NULL; |
| release_pkt(pkt); |
| |
| return ret; |
| } |
| |
| int msm_ipc_router_send_msg(struct msm_ipc_port *src, |
| struct msm_ipc_addr *dest, |
| void *data, unsigned int data_len) |
| { |
| struct sk_buff_head *out_skb_head; |
| int ret; |
| |
| out_skb_head = msm_ipc_router_buf_to_skb(data, data_len); |
| if (!out_skb_head) { |
| IPC_RTR_ERR("%s: SKB conversion failed\n", __func__); |
| return -EFAULT; |
| } |
| |
| ret = msm_ipc_router_send_to(src, out_skb_head, dest, 0); |
| if (ret < 0) { |
| if (ret != -EAGAIN) |
| IPC_RTR_ERR( |
| "%s: msm_ipc_router_send_to failed - ret: %d\n", |
| __func__, ret); |
| msm_ipc_router_free_skb(out_skb_head); |
| return ret; |
| } |
| return 0; |
| } |
| |
| /** |
| * msm_ipc_router_send_resume_tx() - Send Resume_Tx message |
| * @data: Pointer to received data packet that has confirm_rx bit set |
| * |
| * @return: On success, number of bytes transferred is returned, else |
| * standard linux error code is returned. |
| * |
| * This function sends the Resume_Tx event to the remote node that |
| * sent the data with confirm_rx field set. In case of a multi-hop |
| * scenario also, this function makes sure that the destination node_id |
| * to which the resume_tx event should reach is right. |
| */ |
| static int msm_ipc_router_send_resume_tx(void *data) |
| { |
| union rr_control_msg msg; |
| struct rr_header_v1 *hdr = (struct rr_header_v1 *)data; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| int ret; |
| |
| memset(&msg, 0, sizeof(msg)); |
| msg.cmd = IPC_ROUTER_CTRL_CMD_RESUME_TX; |
| msg.cli.node_id = hdr->dst_node_id; |
| msg.cli.port_id = hdr->dst_port_id; |
| rt_entry = ipc_router_get_rtentry_ref(hdr->src_node_id); |
| if (!rt_entry) { |
| IPC_RTR_ERR("%s: %d Node is not present", __func__, |
| hdr->src_node_id); |
| return -ENODEV; |
| } |
| ret = ipc_router_get_xprt_info_ref(rt_entry->xprt_info); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Abort invalid xprt\n", __func__); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| return ret; |
| } |
| ret = ipc_router_send_ctl_msg(rt_entry->xprt_info, &msg, |
| hdr->src_node_id); |
| ipc_router_put_xprt_info_ref(rt_entry->xprt_info); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| if (ret < 0) |
| IPC_RTR_ERR( |
| "%s: Send Resume_Tx Failed SRC_NODE: %d SRC_PORT: %d DEST_NODE: %d", |
| __func__, hdr->dst_node_id, hdr->dst_port_id, |
| hdr->src_node_id); |
| |
| return ret; |
| } |
| |
| int msm_ipc_router_read(struct msm_ipc_port *port_ptr, |
| struct rr_packet **read_pkt, |
| size_t buf_len) |
| { |
| struct rr_packet *pkt; |
| |
| if (!port_ptr || !read_pkt) |
| return -EINVAL; |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| if (list_empty(&port_ptr->port_rx_q)) { |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| return -EAGAIN; |
| } |
| |
| pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, list); |
| if ((buf_len) && (pkt->hdr.size > buf_len)) { |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| return -ETOOSMALL; |
| } |
| list_del(&pkt->list); |
| if (list_empty(&port_ptr->port_rx_q)) |
| __pm_relax(port_ptr->port_rx_ws); |
| *read_pkt = pkt; |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| if (pkt->hdr.control_flag & CONTROL_FLAG_CONFIRM_RX) |
| msm_ipc_router_send_resume_tx(&pkt->hdr); |
| |
| return pkt->length; |
| } |
| |
| /** |
| * msm_ipc_router_rx_data_wait() - Wait for new message destined to a local |
| * port. |
| * @port_ptr: Pointer to the local port |
| * @timeout: < 0 timeout indicates infinite wait till a message arrives. |
| * > 0 timeout indicates the wait time. |
| * 0 indicates that we do not wait. |
| * @return: 0 if there are pending messages to read, |
| * standard Linux error code otherwise. |
| * |
| * Checks for the availability of messages that are destined to a local port. |
| * If no messages are present then waits as per @timeout. |
| */ |
| int msm_ipc_router_rx_data_wait(struct msm_ipc_port *port_ptr, long timeout) |
| { |
| int ret = 0; |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| while (list_empty(&port_ptr->port_rx_q)) { |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| if (timeout < 0) { |
| ret = wait_event_interruptible( |
| port_ptr->port_rx_wait_q, |
| !list_empty(&port_ptr->port_rx_q)); |
| if (ret) |
| return ret; |
| } else if (timeout > 0) { |
| timeout = wait_event_interruptible_timeout( |
| port_ptr->port_rx_wait_q, |
| !list_empty(&port_ptr->port_rx_q), |
| timeout); |
| if (timeout < 0) |
| return -EFAULT; |
| } |
| if (timeout == 0) |
| return -ENOMSG; |
| mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| } |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| |
| return ret; |
| } |
| |
| /** |
| * msm_ipc_router_recv_from() - Receive messages destined to a local port. |
| * @port_ptr: Pointer to the local port |
| * @pkt : Pointer to the router-to-router packet |
| * @src: Pointer to local port address |
| * @timeout: < 0 timeout indicates infinite wait till a message arrives. |
| * > 0 timeout indicates the wait time. |
| * 0 indicates that we do not wait. |
| * @return: = Number of bytes read(On successful read operation). |
| * = -ENOMSG (If there are no pending messages and timeout is 0). |
| * = -EINVAL (If either of the arguments, port_ptr or data is invalid) |
| * = -EFAULT (If there are no pending messages when timeout is > 0 |
| * and the wait_event_interruptible_timeout has returned value > 0) |
| * = -ERESTARTSYS (If there are no pending messages when timeout |
| * is < 0 and wait_event_interruptible was interrupted by a signal) |
| * |
| * This function reads the messages that are destined for a local port. It |
| * is used by modules that exist with-in the kernel and use IPC Router for |
| * transport. The function checks if there are any messages that are already |
| * received. If yes, it reads them, else it waits as per the timeout value. |
| * On a successful read, the return value of the function indicates the number |
| * of bytes that are read. |
| */ |
| int msm_ipc_router_recv_from(struct msm_ipc_port *port_ptr, |
| struct rr_packet **pkt, |
| struct msm_ipc_addr *src, |
| long timeout) |
| { |
| int ret, data_len, align_size; |
| struct sk_buff *temp_skb; |
| struct rr_header_v1 *hdr = NULL; |
| |
| if (!port_ptr || !pkt) { |
| IPC_RTR_ERR("%s: Invalid pointers being passed\n", __func__); |
| return -EINVAL; |
| } |
| |
| *pkt = NULL; |
| |
| ret = msm_ipc_router_rx_data_wait(port_ptr, timeout); |
| if (ret) |
| return ret; |
| |
| ret = msm_ipc_router_read(port_ptr, pkt, 0); |
| if (ret <= 0 || !(*pkt)) |
| return ret; |
| |
| hdr = &((*pkt)->hdr); |
| if (src) { |
| src->addrtype = MSM_IPC_ADDR_ID; |
| src->addr.port_addr.node_id = hdr->src_node_id; |
| src->addr.port_addr.port_id = hdr->src_port_id; |
| } |
| |
| data_len = hdr->size; |
| align_size = ALIGN_SIZE(data_len); |
| if (align_size) { |
| temp_skb = skb_peek_tail((*pkt)->pkt_fragment_q); |
| if (temp_skb) |
| skb_trim(temp_skb, (temp_skb->len - align_size)); |
| } |
| return data_len; |
| } |
| |
| int msm_ipc_router_read_msg(struct msm_ipc_port *port_ptr, |
| struct msm_ipc_addr *src, |
| unsigned char **data, |
| unsigned int *len) |
| { |
| struct rr_packet *pkt; |
| int ret; |
| |
| ret = msm_ipc_router_recv_from(port_ptr, &pkt, src, 0); |
| if (ret < 0) { |
| if (ret != -ENOMSG) |
| IPC_RTR_ERR( |
| "%s: msm_ipc_router_recv_from failed - ret: %d\n", |
| __func__, ret); |
| return ret; |
| } |
| |
| *data = msm_ipc_router_skb_to_buf(pkt->pkt_fragment_q, ret); |
| if (!(*data)) { |
| IPC_RTR_ERR("%s: Buf conversion failed\n", __func__); |
| release_pkt(pkt); |
| return -ENOMEM; |
| } |
| |
| *len = ret; |
| release_pkt(pkt); |
| return 0; |
| } |
| |
| /** |
| * msm_ipc_router_create_port() - Create a IPC Router port/endpoint |
| * @notify: Callback function to notify any event on the port. |
| * @event: Event ID to be handled. |
| * @oob_data: Any out-of-band data associated with the event. |
| * @oob_data_len: Size of the out-of-band data, if valid. |
| * @priv: Private data registered during the port creation. |
| * @priv: Private info to be passed while the notification is generated. |
| * |
| * @return: Pointer to the port on success, NULL on error. |
| */ |
| struct msm_ipc_port *msm_ipc_router_create_port( |
| void (*notify)(unsigned int event, void *oob_data, |
| size_t oob_data_len, void *priv), |
| void *priv) |
| { |
| struct msm_ipc_port *port_ptr; |
| int ret; |
| |
| ret = ipc_router_core_init(); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Error %d initializing IPC Router\n", |
| __func__, ret); |
| return NULL; |
| } |
| |
| port_ptr = msm_ipc_router_create_raw_port(NULL, notify, priv); |
| if (!port_ptr) |
| IPC_RTR_ERR("%s: port_ptr alloc failed\n", __func__); |
| |
| return port_ptr; |
| } |
| |
| int msm_ipc_router_close_port(struct msm_ipc_port *port_ptr) |
| { |
| union rr_control_msg msg; |
| struct msm_ipc_server *server; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| |
| if (!port_ptr) |
| return -EINVAL; |
| |
| if (port_ptr->type == SERVER_PORT || port_ptr->type == CLIENT_PORT) { |
| down_write(&local_ports_lock_lhc2); |
| list_del(&port_ptr->list); |
| up_write(&local_ports_lock_lhc2); |
| |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| rport_ptr = (struct msm_ipc_router_remote_port *) |
| port_ptr->rport_info; |
| port_ptr->rport_info = NULL; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| if (rport_ptr) { |
| ipc_router_reset_conn(rport_ptr); |
| ipc_router_destroy_rport(rport_ptr); |
| } |
| |
| /* Server port could have been a client port earlier. |
| * Send REMOVE_CLIENT message in either case. |
| */ |
| msm_ipc_router_send_remove_client(&port_ptr->mode_info, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| } else if (port_ptr->type == CONTROL_PORT) { |
| down_write(&control_ports_lock_lha5); |
| list_del(&port_ptr->list); |
| up_write(&control_ports_lock_lha5); |
| } else if (port_ptr->type == IRSC_PORT) { |
| down_write(&local_ports_lock_lhc2); |
| list_del(&port_ptr->list); |
| up_write(&local_ports_lock_lhc2); |
| signal_irsc_completion(); |
| } |
| |
| if (port_ptr->type == SERVER_PORT) { |
| server = ipc_router_get_server_ref( |
| port_ptr->port_name.service, |
| port_ptr->port_name.instance, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| if (server) { |
| kref_put(&server->ref, ipc_router_release_server); |
| ipc_router_destroy_server(server, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| } |
| /** |
| * released server information from hash table, now |
| * it is safe to broadcast remove server message so that |
| * next call to lookup server will not succeed until |
| * server open the port again |
| */ |
| memset(&msg, 0, sizeof(msg)); |
| msg.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_SERVER; |
| msg.srv.service = port_ptr->port_name.service; |
| msg.srv.instance = port_ptr->port_name.instance; |
| msg.srv.node_id = port_ptr->this_port.node_id; |
| msg.srv.port_id = port_ptr->this_port.port_id; |
| broadcast_ctl_msg(&msg); |
| } |
| |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| rport_ptr = (struct msm_ipc_router_remote_port *)port_ptr->rport_info; |
| port_ptr->rport_info = NULL; |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| if (rport_ptr) |
| ipc_router_destroy_rport(rport_ptr); |
| |
| kref_put(&port_ptr->ref, ipc_router_release_port); |
| return 0; |
| } |
| |
| int msm_ipc_router_get_curr_pkt_size(struct msm_ipc_port *port_ptr) |
| { |
| struct rr_packet *pkt; |
| int rc = 0; |
| |
| if (!port_ptr) |
| return -EINVAL; |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhc3); |
| if (!list_empty(&port_ptr->port_rx_q)) { |
| pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, |
| list); |
| rc = pkt->hdr.size; |
| } |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhc3); |
| |
| return rc; |
| } |
| |
| int msm_ipc_router_bind_control_port(struct msm_ipc_port *port_ptr) |
| { |
| if (unlikely(!port_ptr || port_ptr->type != CLIENT_PORT)) |
| return -EINVAL; |
| |
| down_write(&local_ports_lock_lhc2); |
| list_del(&port_ptr->list); |
| up_write(&local_ports_lock_lhc2); |
| port_ptr->type = CONTROL_PORT; |
| down_write(&control_ports_lock_lha5); |
| list_add_tail(&port_ptr->list, &control_ports); |
| up_write(&control_ports_lock_lha5); |
| |
| return 0; |
| } |
| |
| int msm_ipc_router_lookup_server_name(struct msm_ipc_port_name *srv_name, |
| struct msm_ipc_server_info *srv_info, |
| int num_entries_in_array, u32 lookup_mask) |
| { |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| int key, i = 0; /*num_entries_found*/ |
| |
| if (!srv_name) { |
| IPC_RTR_ERR("%s: Invalid srv_name\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (num_entries_in_array && !srv_info) { |
| IPC_RTR_ERR("%s: srv_info NULL\n", __func__); |
| return -EINVAL; |
| } |
| |
| down_read(&server_list_lock_lha2); |
| key = (srv_name->service & (SRV_HASH_SIZE - 1)); |
| list_for_each_entry(server, &server_list[key], list) { |
| if ((server->name.service != srv_name->service) || |
| ((server->name.instance & lookup_mask) != |
| srv_name->instance)) |
| continue; |
| |
| list_for_each_entry(server_port, &server->server_port_list, |
| list) { |
| if (i < num_entries_in_array) { |
| srv_info[i].node_id = |
| server_port->server_addr.node_id; |
| srv_info[i].port_id = |
| server_port->server_addr.port_id; |
| srv_info[i].service = server->name.service; |
| srv_info[i].instance = server->name.instance; |
| } |
| i++; |
| } |
| } |
| up_read(&server_list_lock_lha2); |
| |
| return i; |
| } |
| |
| int msm_ipc_router_close(void) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info, *tmp_xprt_info; |
| |
| down_write(&xprt_info_list_lock_lha5); |
| list_for_each_entry_safe(xprt_info, tmp_xprt_info, |
| &xprt_info_list, list) { |
| xprt_info->xprt->close(xprt_info->xprt); |
| list_del(&xprt_info->list); |
| kfree(xprt_info); |
| } |
| up_write(&xprt_info_list_lock_lha5); |
| return 0; |
| } |
| |
| /** |
| * pil_vote_load_worker() - Process vote to load the modem |
| * |
| * @work: Work item to process |
| * |
| * This function is called to process votes to load the modem that have been |
| * queued by msm_ipc_load_default_node(). |
| */ |
| static void pil_vote_load_worker(struct work_struct *work) |
| { |
| struct pil_vote_info *vote_info; |
| |
| vote_info = container_of(work, struct pil_vote_info, load_work); |
| if (strlen(default_peripheral)) { |
| vote_info->pil_handle = subsystem_get(default_peripheral); |
| if (IS_ERR(vote_info->pil_handle)) { |
| IPC_RTR_ERR("%s: Failed to load %s\n", |
| __func__, default_peripheral); |
| vote_info->pil_handle = NULL; |
| } |
| } else { |
| vote_info->pil_handle = NULL; |
| } |
| } |
| |
| /** |
| * pil_vote_unload_worker() - Process vote to unload the modem |
| * |
| * @work: Work item to process |
| * |
| * This function is called to process votes to unload the modem that have been |
| * queued by msm_ipc_unload_default_node(). |
| */ |
| static void pil_vote_unload_worker(struct work_struct *work) |
| { |
| struct pil_vote_info *vote_info; |
| |
| vote_info = container_of(work, struct pil_vote_info, unload_work); |
| |
| if (vote_info->pil_handle) { |
| subsystem_put(vote_info->pil_handle); |
| vote_info->pil_handle = NULL; |
| } |
| kfree(vote_info); |
| } |
| |
| /** |
| * msm_ipc_load_default_node() - Queue a vote to load the modem. |
| * |
| * @return: PIL vote info structure on success, NULL on failure. |
| * |
| * This function places a work item that loads the modem on the |
| * single-threaded workqueue used for processing PIL votes to load |
| * or unload the modem. |
| */ |
| void *msm_ipc_load_default_node(void) |
| { |
| struct pil_vote_info *vote_info; |
| |
| vote_info = kmalloc(sizeof(*vote_info), GFP_KERNEL); |
| if (!vote_info) |
| return vote_info; |
| |
| INIT_WORK(&vote_info->load_work, pil_vote_load_worker); |
| queue_work(msm_ipc_router_workqueue, &vote_info->load_work); |
| |
| return vote_info; |
| } |
| |
| /** |
| * msm_ipc_unload_default_node() - Queue a vote to unload the modem. |
| * |
| * @pil_vote: PIL vote info structure, containing the PIL handle |
| * and work structure. |
| * |
| * This function places a work item that unloads the modem on the |
| * single-threaded workqueue used for processing PIL votes to load |
| * or unload the modem. |
| */ |
| void msm_ipc_unload_default_node(void *pil_vote) |
| { |
| struct pil_vote_info *vote_info; |
| |
| if (pil_vote) { |
| vote_info = (struct pil_vote_info *)pil_vote; |
| INIT_WORK(&vote_info->unload_work, pil_vote_unload_worker); |
| queue_work(msm_ipc_router_workqueue, &vote_info->unload_work); |
| } |
| } |
| |
| #if defined(CONFIG_DEBUG_FS) |
| static void dump_routing_table(struct seq_file *s) |
| { |
| int j; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| seq_printf(s, "%-10s|%-20s|%-10s|\n", "Node Id", "XPRT Name", |
| "Next Hop"); |
| seq_puts(s, "----------------------------------------------\n"); |
| for (j = 0; j < RT_HASH_SIZE; j++) { |
| down_read(&routing_table_lock_lha3); |
| list_for_each_entry(rt_entry, &routing_table[j], list) { |
| down_read(&rt_entry->lock_lha4); |
| seq_printf(s, "0x%08x|", rt_entry->node_id); |
| if (rt_entry->node_id == IPC_ROUTER_NID_LOCAL) |
| seq_printf(s, "%-20s|0x%08x|\n", "Loopback", |
| rt_entry->node_id); |
| else |
| seq_printf(s, "%-20s|0x%08x|\n", |
| rt_entry->xprt_info->xprt->name, |
| rt_entry->node_id); |
| up_read(&rt_entry->lock_lha4); |
| } |
| up_read(&routing_table_lock_lha3); |
| } |
| } |
| |
| static void dump_xprt_info(struct seq_file *s) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info; |
| |
| seq_printf(s, "%-20s|%-10s|%-12s|%-15s|\n", "XPRT Name", "Link ID", |
| "Initialized", "Remote Node Id"); |
| seq_puts(s, "------------------------------------------------------------\n"); |
| down_read(&xprt_info_list_lock_lha5); |
| list_for_each_entry(xprt_info, &xprt_info_list, list) |
| seq_printf(s, "%-20s|0x%08x|%-12s|0x%08x|\n", |
| xprt_info->xprt->name, xprt_info->xprt->link_id, |
| (xprt_info->initialized ? "Y" : "N"), |
| xprt_info->remote_node_id); |
| up_read(&xprt_info_list_lock_lha5); |
| } |
| |
| static void dump_servers(struct seq_file *s) |
| { |
| int j; |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| |
| seq_printf(s, "%-11s|%-11s|%-11s|%-11s|\n", "Service", "Instance", |
| "Node_id", "Port_id"); |
| seq_puts(s, "------------------------------------------------------------\n"); |
| down_read(&server_list_lock_lha2); |
| for (j = 0; j < SRV_HASH_SIZE; j++) { |
| list_for_each_entry(server, &server_list[j], list) { |
| list_for_each_entry(server_port, |
| &server->server_port_list, |
| list) |
| seq_printf(s, "0x%08x |0x%08x |0x%08x |0x%08x |\n", |
| server->name.service, |
| server->name.instance, |
| server_port->server_addr.node_id, |
| server_port->server_addr.port_id); |
| } |
| } |
| up_read(&server_list_lock_lha2); |
| } |
| |
| static void dump_remote_ports(struct seq_file *s) |
| { |
| int j, k; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| seq_printf(s, "%-11s|%-11s|%-10s|\n", "Node_id", "Port_id", |
| "Quota_cnt"); |
| seq_puts(s, "------------------------------------------------------------\n"); |
| for (j = 0; j < RT_HASH_SIZE; j++) { |
| down_read(&routing_table_lock_lha3); |
| list_for_each_entry(rt_entry, &routing_table[j], list) { |
| down_read(&rt_entry->lock_lha4); |
| for (k = 0; k < RP_HASH_SIZE; k++) { |
| list_for_each_entry |
| (rport_ptr, |
| &rt_entry->remote_port_list[k], |
| list) |
| seq_printf(s, "0x%08x |0x%08x |0x%08x|\n", |
| rport_ptr->node_id, |
| rport_ptr->port_id, |
| rport_ptr->tx_quota_cnt); |
| } |
| up_read(&rt_entry->lock_lha4); |
| } |
| up_read(&routing_table_lock_lha3); |
| } |
| } |
| |
| static void dump_control_ports(struct seq_file *s) |
| { |
| struct msm_ipc_port *port_ptr; |
| |
| seq_printf(s, "%-11s|%-11s|\n", "Node_id", "Port_id"); |
| seq_puts(s, "------------------------------------------------------------\n"); |
| down_read(&control_ports_lock_lha5); |
| list_for_each_entry(port_ptr, &control_ports, list) |
| seq_printf(s, "0x%08x |0x%08x |\n", port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| up_read(&control_ports_lock_lha5); |
| } |
| |
| static void dump_local_ports(struct seq_file *s) |
| { |
| int j; |
| struct msm_ipc_port *port_ptr; |
| |
| seq_printf(s, "%-11s|%-11s|%-32s|%-11s|\n", |
| "Node_id", "Port_id", "Wakelock", "Last SVCID"); |
| seq_puts(s, "------------------------------------------------------------\n"); |
| down_read(&local_ports_lock_lhc2); |
| for (j = 0; j < LP_HASH_SIZE; j++) { |
| list_for_each_entry(port_ptr, &local_ports[j], list) { |
| mutex_lock(&port_ptr->port_lock_lhc3); |
| seq_printf(s, "0x%08x |0x%08x |%-32s|0x%08x |\n", |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id, |
| port_ptr->rx_ws_name, |
| port_ptr->last_served_svc_id); |
| mutex_unlock(&port_ptr->port_lock_lhc3); |
| } |
| } |
| up_read(&local_ports_lock_lhc2); |
| } |
| |
| static int debugfs_show(struct seq_file *s, void *data) |
| { |
| void (*show)(struct seq_file *) = s->private; |
| |
| show(s); |
| return 0; |
| } |
| |
| static int debug_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, debugfs_show, inode->i_private); |
| } |
| |
| static const struct file_operations debug_ops = { |
| .open = debug_open, |
| .release = single_release, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| }; |
| |
| static void debug_create(const char *name, struct dentry *dent, |
| void (*show)(struct seq_file *)) |
| { |
| debugfs_create_file(name, 0444, dent, show, &debug_ops); |
| } |
| |
| static void debugfs_init(void) |
| { |
| struct dentry *dent; |
| |
| dent = debugfs_create_dir("msm_ipc_router", 0); |
| if (IS_ERR(dent)) |
| return; |
| |
| debug_create("dump_local_ports", dent, dump_local_ports); |
| debug_create("dump_remote_ports", dent, dump_remote_ports); |
| debug_create("dump_control_ports", dent, dump_control_ports); |
| debug_create("dump_servers", dent, dump_servers); |
| debug_create("dump_xprt_info", dent, dump_xprt_info); |
| debug_create("dump_routing_table", dent, dump_routing_table); |
| } |
| |
| #else |
| static void debugfs_init(void) {} |
| #endif |
| |
| /** |
| * ipc_router_create_log_ctx() - Create and add the log context based on |
| * transport |
| * @name: subsystem name |
| * |
| * Return: a reference to the log context created |
| * |
| * This function creates ipc log context based on transport and adds it to a |
| * global list. This log context can be reused from the list in case of a |
| * subsystem restart. |
| */ |
| static void *ipc_router_create_log_ctx(char *name) |
| { |
| struct ipc_rtr_log_ctx *sub_log_ctx; |
| |
| sub_log_ctx = kmalloc(sizeof(*sub_log_ctx), GFP_KERNEL); |
| if (!sub_log_ctx) |
| return NULL; |
| sub_log_ctx->log_ctx = ipc_log_context_create( |
| IPC_RTR_INFO_PAGES, name, 0); |
| if (!sub_log_ctx->log_ctx) { |
| IPC_RTR_ERR("%s: Unable to create IPC logging for [%s]", |
| __func__, name); |
| kfree(sub_log_ctx); |
| return NULL; |
| } |
| strlcpy(sub_log_ctx->log_ctx_name, name, LOG_CTX_NAME_LEN); |
| INIT_LIST_HEAD(&sub_log_ctx->list); |
| list_add_tail(&sub_log_ctx->list, &log_ctx_list); |
| return sub_log_ctx->log_ctx; |
| } |
| |
| static void ipc_router_log_ctx_init(void) |
| { |
| mutex_lock(&log_ctx_list_lock_lha0); |
| local_log_ctx = ipc_router_create_log_ctx("local_IPCRTR"); |
| mutex_unlock(&log_ctx_list_lock_lha0); |
| } |
| |
| /** |
| * ipc_router_get_log_ctx() - Retrieves the ipc log context based on subsystem |
| * name. |
| * @sub_name: subsystem name |
| * |
| * Return: a reference to the log context |
| */ |
| static void *ipc_router_get_log_ctx(char *sub_name) |
| { |
| void *log_ctx = NULL; |
| struct ipc_rtr_log_ctx *temp_log_ctx; |
| |
| mutex_lock(&log_ctx_list_lock_lha0); |
| list_for_each_entry(temp_log_ctx, &log_ctx_list, list) |
| if (!strcmp(temp_log_ctx->log_ctx_name, sub_name)) { |
| log_ctx = temp_log_ctx->log_ctx; |
| mutex_unlock(&log_ctx_list_lock_lha0); |
| return log_ctx; |
| } |
| log_ctx = ipc_router_create_log_ctx(sub_name); |
| mutex_unlock(&log_ctx_list_lock_lha0); |
| |
| return log_ctx; |
| } |
| |
| /** |
| * ipc_router_get_xprt_info_ref() - Get a reference to the xprt_info structure |
| * @xprt_info: pointer to the xprt_info. |
| * |
| * @return: Zero on success, -ENODEV on failure. |
| * |
| * This function is used to obtain a reference to the xprt_info structure |
| * corresponding to the requested @xprt_info pointer. |
| */ |
| static int ipc_router_get_xprt_info_ref( |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| int ret = -ENODEV; |
| struct msm_ipc_router_xprt_info *tmp_xprt_info; |
| |
| if (!xprt_info) |
| return 0; |
| |
| down_read(&xprt_info_list_lock_lha5); |
| list_for_each_entry(tmp_xprt_info, &xprt_info_list, list) { |
| if (tmp_xprt_info == xprt_info) { |
| kref_get(&xprt_info->ref); |
| ret = 0; |
| break; |
| } |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| |
| return ret; |
| } |
| |
| /** |
| * ipc_router_put_xprt_info_ref() - Put a reference to the xprt_info structure |
| * @xprt_info: pointer to the xprt_info. |
| * |
| * This function is used to put the reference to the xprt_info structure |
| * corresponding to the requested @xprt_info pointer. |
| */ |
| static void ipc_router_put_xprt_info_ref( |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| if (xprt_info) |
| kref_put(&xprt_info->ref, ipc_router_release_xprt_info_ref); |
| } |
| |
| /** |
| * ipc_router_release_xprt_info_ref() - release the xprt_info last reference |
| * @ref: Reference to the xprt_info structure. |
| * |
| * This function is called when all references to the xprt_info structure |
| * are released. |
| */ |
| static void ipc_router_release_xprt_info_ref(struct kref *ref) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info = |
| container_of(ref, struct msm_ipc_router_xprt_info, ref); |
| |
| complete_all(&xprt_info->ref_complete); |
| } |
| |
| static int msm_ipc_router_add_xprt(struct msm_ipc_router_xprt *xprt) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info; |
| struct sched_param param = {.sched_priority = 1}; |
| |
| xprt_info = kmalloc(sizeof(*xprt_info), GFP_KERNEL); |
| if (!xprt_info) |
| return -ENOMEM; |
| |
| xprt_info->xprt = xprt; |
| xprt_info->initialized = 0; |
| xprt_info->hello_sent = 0; |
| xprt_info->remote_node_id = -1; |
| INIT_LIST_HEAD(&xprt_info->pkt_list); |
| mutex_init(&xprt_info->rx_lock_lhb2); |
| mutex_init(&xprt_info->tx_lock_lhb2); |
| wakeup_source_init(&xprt_info->ws, xprt->name); |
| xprt_info->need_len = 0; |
| xprt_info->abort_data_read = 0; |
| INIT_LIST_HEAD(&xprt_info->list); |
| kref_init(&xprt_info->ref); |
| init_completion(&xprt_info->ref_complete); |
| xprt_info->dynamic_ws = 0; |
| if (xprt->get_ws_info) |
| xprt_info->dynamic_ws = xprt->get_ws_info(xprt); |
| |
| kthread_init_work(&xprt_info->read_data, do_read_data); |
| kthread_init_worker(&xprt_info->kworker); |
| xprt_info->task = kthread_run(kthread_worker_fn, |
| &xprt_info->kworker, |
| "%s", xprt->name); |
| if (IS_ERR(xprt_info->task)) { |
| kfree(xprt_info); |
| return -ENOMEM; |
| } |
| if (xprt->get_latency_info && xprt->get_latency_info(xprt)) |
| sched_setscheduler(xprt_info->task, SCHED_FIFO, ¶m); |
| |
| xprt_info->log_ctx = ipc_router_get_log_ctx(xprt->name); |
| |
| if (!strcmp(xprt->name, "msm_ipc_router_loopback_xprt")) { |
| xprt_info->remote_node_id = IPC_ROUTER_NID_LOCAL; |
| xprt_info->initialized = 1; |
| } |
| |
| IPC_RTR_INFO(xprt_info->log_ctx, "Adding xprt: [%s]\n", xprt->name); |
| down_write(&xprt_info_list_lock_lha5); |
| list_add_tail(&xprt_info->list, &xprt_info_list); |
| up_write(&xprt_info_list_lock_lha5); |
| |
| down_write(&routing_table_lock_lha3); |
| if (!routing_table_inited) { |
| init_routing_table(); |
| routing_table_inited = 1; |
| } |
| up_write(&routing_table_lock_lha3); |
| |
| xprt->priv = xprt_info; |
| send_hello_msg(xprt_info); |
| |
| return 0; |
| } |
| |
| static void msm_ipc_router_remove_xprt(struct msm_ipc_router_xprt *xprt) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info; |
| struct rr_packet *temp_pkt, *pkt; |
| |
| if (xprt && xprt->priv) { |
| xprt_info = xprt->priv; |
| |
| IPC_RTR_INFO(xprt_info->log_ctx, "Removing xprt: [%s]\n", |
| xprt->name); |
| mutex_lock(&xprt_info->rx_lock_lhb2); |
| xprt_info->abort_data_read = 1; |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| kthread_flush_worker(&xprt_info->kworker); |
| kthread_stop(xprt_info->task); |
| xprt_info->task = NULL; |
| mutex_lock(&xprt_info->rx_lock_lhb2); |
| list_for_each_entry_safe(pkt, temp_pkt, |
| &xprt_info->pkt_list, list) { |
| list_del(&pkt->list); |
| release_pkt(pkt); |
| } |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| |
| down_write(&xprt_info_list_lock_lha5); |
| list_del(&xprt_info->list); |
| up_write(&xprt_info_list_lock_lha5); |
| |
| msm_ipc_cleanup_routing_table(xprt_info); |
| |
| wakeup_source_trash(&xprt_info->ws); |
| |
| ipc_router_put_xprt_info_ref(xprt_info); |
| wait_for_completion(&xprt_info->ref_complete); |
| |
| xprt->priv = 0; |
| kfree(xprt_info); |
| } |
| } |
| |
| struct msm_ipc_router_xprt_work { |
| struct msm_ipc_router_xprt *xprt; |
| struct work_struct work; |
| }; |
| |
| static void xprt_open_worker(struct work_struct *work) |
| { |
| struct msm_ipc_router_xprt_work *xprt_work = |
| container_of(work, struct msm_ipc_router_xprt_work, work); |
| |
| msm_ipc_router_add_xprt(xprt_work->xprt); |
| kfree(xprt_work); |
| } |
| |
| static void xprt_close_worker(struct work_struct *work) |
| { |
| struct msm_ipc_router_xprt_work *xprt_work = |
| container_of(work, struct msm_ipc_router_xprt_work, work); |
| |
| msm_ipc_router_remove_xprt(xprt_work->xprt); |
| xprt_work->xprt->sft_close_done(xprt_work->xprt); |
| kfree(xprt_work); |
| } |
| |
| void msm_ipc_router_xprt_notify(struct msm_ipc_router_xprt *xprt, |
| unsigned int event, |
| void *data) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info = xprt->priv; |
| struct msm_ipc_router_xprt_work *xprt_work; |
| struct msm_ipc_router_remote_port *rport_ptr = NULL; |
| struct rr_packet *pkt; |
| int ret; |
| |
| ret = ipc_router_core_init(); |
| if (ret < 0) { |
| IPC_RTR_ERR("%s: Error %d initializing IPC Router\n", |
| __func__, ret); |
| return; |
| } |
| |
| switch (event) { |
| case IPC_ROUTER_XPRT_EVENT_OPEN: |
| xprt_work = kmalloc(sizeof(*xprt_work), GFP_ATOMIC); |
| if (xprt_work) { |
| xprt_work->xprt = xprt; |
| INIT_WORK(&xprt_work->work, xprt_open_worker); |
| queue_work(msm_ipc_router_workqueue, &xprt_work->work); |
| } else { |
| IPC_RTR_ERR( |
| "%s: malloc failure - Couldn't notify OPEN event", |
| __func__); |
| } |
| break; |
| |
| case IPC_ROUTER_XPRT_EVENT_CLOSE: |
| xprt_work = kmalloc(sizeof(*xprt_work), GFP_ATOMIC); |
| if (xprt_work) { |
| xprt_work->xprt = xprt; |
| INIT_WORK(&xprt_work->work, xprt_close_worker); |
| queue_work(msm_ipc_router_workqueue, &xprt_work->work); |
| } else { |
| IPC_RTR_ERR( |
| "%s: malloc failure - Couldn't notify CLOSE event", |
| __func__); |
| } |
| break; |
| } |
| |
| if (!data) |
| return; |
| |
| while (!xprt_info) { |
| msleep(100); |
| xprt_info = xprt->priv; |
| } |
| |
| pkt = clone_pkt((struct rr_packet *)data); |
| if (!pkt) |
| return; |
| |
| if (pkt->length < calc_rx_header_size(xprt_info) || |
| pkt->length > MAX_IPC_PKT_SIZE) { |
| IPC_RTR_ERR("%s: Invalid pkt length %d\n", |
| __func__, pkt->length); |
| release_pkt(pkt); |
| return; |
| } |
| |
| ret = extract_header(pkt); |
| if (ret < 0) { |
| release_pkt(pkt); |
| return; |
| } |
| |
| pkt->ws_need = false; |
| |
| if (pkt->hdr.type == IPC_ROUTER_CTRL_CMD_DATA) |
| rport_ptr = ipc_router_get_rport_ref(pkt->hdr.src_node_id, |
| pkt->hdr.src_port_id); |
| |
| mutex_lock(&xprt_info->rx_lock_lhb2); |
| list_add_tail(&pkt->list, &xprt_info->pkt_list); |
| /* check every pkt is from SENSOR services or not and |
| * avoid holding both edge and port specific wake-up sources |
| */ |
| if (!is_sensor_port(rport_ptr)) { |
| if (!xprt_info->dynamic_ws) { |
| __pm_stay_awake(&xprt_info->ws); |
| pkt->ws_need = true; |
| } else { |
| if (is_wakeup_source_allowed) { |
| __pm_stay_awake(&xprt_info->ws); |
| pkt->ws_need = true; |
| } |
| } |
| } |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| if (rport_ptr) |
| kref_put(&rport_ptr->ref, ipc_router_release_rport); |
| kthread_queue_work(&xprt_info->kworker, &xprt_info->read_data); |
| } |
| |
| /** |
| * parse_devicetree() - parse device tree binding |
| * |
| * @node: pointer to device tree node |
| * |
| * @return: 0 on success, -ENODEV on failure. |
| */ |
| static int parse_devicetree(struct device_node *node) |
| { |
| char *key; |
| const char *peripheral = NULL; |
| |
| key = "qcom,default-peripheral"; |
| peripheral = of_get_property(node, key, NULL); |
| if (peripheral) |
| strlcpy(default_peripheral, peripheral, PIL_SUBSYSTEM_NAME_LEN); |
| |
| return 0; |
| } |
| |
| /** |
| * ipc_router_probe() - Probe the IPC Router |
| * |
| * @pdev: Platform device corresponding to IPC Router. |
| * |
| * @return: 0 on success, standard Linux error codes on error. |
| * |
| * This function is called when the underlying device tree driver registers |
| * a platform device, mapped to IPC Router. |
| */ |
| static int ipc_router_probe(struct platform_device *pdev) |
| { |
| int ret = 0; |
| |
| if (pdev && pdev->dev.of_node) { |
| ret = parse_devicetree(pdev->dev.of_node); |
| if (ret) |
| IPC_RTR_ERR("%s: Failed to parse device tree\n", |
| __func__); |
| } |
| return ret; |
| } |
| |
| static const struct of_device_id ipc_router_match_table[] = { |
| { .compatible = "qcom,ipc_router" }, |
| {}, |
| }; |
| |
| static struct platform_driver ipc_router_driver = { |
| .probe = ipc_router_probe, |
| .driver = { |
| .name = MODULE_NAME, |
| .owner = THIS_MODULE, |
| .of_match_table = ipc_router_match_table, |
| }, |
| }; |
| |
| /** |
| * ipc_router_core_init() - Initialize all IPC Router core data structures |
| * |
| * Return: 0 on Success or Standard error code otherwise. |
| * |
| * This function only initializes all the core data structures to the IPC Router |
| * module. The remaining initialization is done inside msm_ipc_router_init(). |
| */ |
| static int ipc_router_core_init(void) |
| { |
| int i; |
| int ret; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| mutex_lock(&ipc_router_init_lock); |
| if (likely(is_ipc_router_inited)) { |
| mutex_unlock(&ipc_router_init_lock); |
| return 0; |
| } |
| |
| debugfs_init(); |
| |
| for (i = 0; i < SRV_HASH_SIZE; i++) |
| INIT_LIST_HEAD(&server_list[i]); |
| |
| for (i = 0; i < LP_HASH_SIZE; i++) |
| INIT_LIST_HEAD(&local_ports[i]); |
| |
| down_write(&routing_table_lock_lha3); |
| if (!routing_table_inited) { |
| init_routing_table(); |
| routing_table_inited = 1; |
| } |
| up_write(&routing_table_lock_lha3); |
| rt_entry = create_routing_table_entry(IPC_ROUTER_NID_LOCAL, NULL); |
| kref_put(&rt_entry->ref, ipc_router_release_rtentry); |
| |
| msm_ipc_router_workqueue = |
| create_singlethread_workqueue("msm_ipc_router"); |
| if (!msm_ipc_router_workqueue) { |
| mutex_unlock(&ipc_router_init_lock); |
| return -ENOMEM; |
| } |
| |
| ret = msm_ipc_router_security_init(); |
| if (ret < 0) |
| IPC_RTR_ERR("%s: Security Init failed\n", __func__); |
| else |
| is_ipc_router_inited = true; |
| mutex_unlock(&ipc_router_init_lock); |
| |
| return ret; |
| } |
| |
| static int msm_ipc_router_init(void) |
| { |
| int ret; |
| |
| ret = ipc_router_core_init(); |
| if (ret < 0) |
| return ret; |
| |
| ret = platform_driver_register(&ipc_router_driver); |
| if (ret) |
| IPC_RTR_ERR( |
| "%s: ipc_router_driver register failed %d\n", __func__, ret); |
| |
| ret = msm_ipc_router_init_sockets(); |
| if (ret < 0) |
| IPC_RTR_ERR("%s: Init sockets failed\n", __func__); |
| |
| ipc_router_log_ctx_init(); |
| return ret; |
| } |
| |
| module_init(msm_ipc_router_init); |
| MODULE_DESCRIPTION("MSM IPC Router"); |
| MODULE_LICENSE("GPL v2"); |