| /* Copyright (c) 2011-2013, 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. |
| */ |
| |
| #define DEBUG |
| |
| #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/wakelock.h> |
| #include <linux/platform_device.h> |
| #include <linux/uaccess.h> |
| #include <linux/debugfs.h> |
| #include <linux/rwsem.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/byteorder.h> |
| |
| #include <mach/smem_log.h> |
| #include <mach/subsystem_notif.h> |
| #include <mach/msm_ipc_router.h> |
| #include <mach/msm_ipc_logging.h> |
| |
| #include "ipc_router.h" |
| #include "modem_notifier.h" |
| #include "msm_ipc_router_security.h" |
| |
| enum { |
| SMEM_LOG = 1U << 0, |
| RTR_DBG = 1U << 1, |
| R2R_MSG = 1U << 2, |
| R2R_RAW = 1U << 3, |
| NTFY_MSG = 1U << 4, |
| R2R_RAW_HDR = 1U << 5, |
| }; |
| |
| static int msm_ipc_router_debug_mask; |
| module_param_named(debug_mask, msm_ipc_router_debug_mask, |
| int, S_IRUGO | S_IWUSR | S_IWGRP); |
| |
| static void *ipc_rtr_log_ctxt; |
| #define IPC_RTR_LOG_PAGES 5 |
| #define DIAG(x...) pr_info("[RR] ERROR " x) |
| |
| #if defined(DEBUG) |
| #define D(x...) do { \ |
| if (ipc_rtr_log_ctxt) \ |
| ipc_log_string(ipc_rtr_log_ctxt, x); \ |
| if (msm_ipc_router_debug_mask & RTR_DBG) \ |
| pr_info(x); \ |
| } while (0) |
| |
| #define RR(x...) do { \ |
| if (ipc_rtr_log_ctxt) \ |
| ipc_log_string(ipc_rtr_log_ctxt, x); \ |
| if (msm_ipc_router_debug_mask & R2R_MSG) \ |
| pr_info("[RR] "x); \ |
| } while (0) |
| |
| #define RAW(x...) do { \ |
| if (msm_ipc_router_debug_mask & R2R_RAW) \ |
| pr_info("[RAW] "x); \ |
| } while (0) |
| |
| #define NTFY(x...) do { \ |
| if (msm_ipc_router_debug_mask & NTFY_MSG) \ |
| pr_info("[NOTIFY] "x); \ |
| } while (0) |
| |
| #define RAW_HDR(x...) do { \ |
| if (msm_ipc_router_debug_mask & R2R_RAW_HDR) \ |
| pr_info("[HDR] "x); \ |
| } while (0) |
| #else |
| #define D(x...) do { } while (0) |
| #define RR(x...) do { } while (0) |
| #define RAW(x...) do { } while (0) |
| #define RAW_HDR(x...) do { } while (0) |
| #define NTFY(x...) do { } while (0) |
| #endif |
| |
| #define IPC_ROUTER_LOG_EVENT_ERROR 0x00 |
| #define IPC_ROUTER_LOG_EVENT_TX 0x01 |
| #define IPC_ROUTER_LOG_EVENT_RX 0x02 |
| |
| 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_lha2); |
| |
| /* |
| * 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 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; |
| uint32_t port_id; |
| uint32_t node_id; |
| }; |
| |
| #define RP_HASH_SIZE 32 |
| struct msm_ipc_router_remote_port { |
| struct list_head list; |
| uint32_t node_id; |
| uint32_t port_id; |
| uint32_t tx_quota_cnt; |
| struct mutex quota_lock_lhb2; |
| struct list_head resume_tx_port_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; |
| uint32_t remote_node_id; |
| uint32_t initialized; |
| struct list_head pkt_list; |
| struct wake_lock wakelock; |
| struct mutex rx_lock_lhb2; |
| struct mutex tx_lock_lhb2; |
| uint32_t need_len; |
| uint32_t abort_data_read; |
| struct work_struct read_data; |
| struct workqueue_struct *workqueue; |
| }; |
| |
| #define RT_HASH_SIZE 4 |
| struct msm_ipc_routing_table_entry { |
| struct list_head list; |
| uint32_t node_id; |
| uint32_t 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; |
| }; |
| |
| 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 work_struct *work); |
| |
| static LIST_HEAD(xprt_info_list); |
| static DECLARE_RWSEM(xprt_info_list_lock_lha5); |
| |
| static DECLARE_COMPLETION(msm_ipc_local_router_up); |
| #define IPC_ROUTER_INIT_TIMEOUT (10 * HZ) |
| |
| static uint32_t next_port_id; |
| static DEFINE_MUTEX(next_port_id_lock_lha1); |
| static struct workqueue_struct *msm_ipc_router_workqueue; |
| |
| enum { |
| DOWN, |
| UP, |
| }; |
| |
| static void init_routing_table(void) |
| { |
| int i; |
| for (i = 0; i < RT_HASH_SIZE; i++) |
| INIT_LIST_HEAD(&routing_table[i]); |
| } |
| |
| static struct msm_ipc_routing_table_entry *alloc_routing_table_entry( |
| uint32_t node_id) |
| { |
| int i; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| rt_entry = kmalloc(sizeof(struct msm_ipc_routing_table_entry), |
| GFP_KERNEL); |
| if (!rt_entry) { |
| pr_err("%s: rt_entry allocation failed for %d\n", |
| __func__, node_id); |
| return NULL; |
| } |
| |
| for (i = 0; i < RP_HASH_SIZE; i++) |
| INIT_LIST_HEAD(&rt_entry->remote_port_list[i]); |
| |
| init_rwsem(&rt_entry->lock_lha4); |
| rt_entry->node_id = node_id; |
| rt_entry->xprt_info = NULL; |
| return rt_entry; |
| } |
| |
| /* Must be called with routing_table_lock_lha3 locked. */ |
| static int add_routing_table_entry( |
| struct msm_ipc_routing_table_entry *rt_entry) |
| { |
| uint32_t key; |
| |
| if (!rt_entry) |
| return -EINVAL; |
| |
| key = (rt_entry->node_id % RT_HASH_SIZE); |
| list_add_tail(&rt_entry->list, &routing_table[key]); |
| return 0; |
| } |
| |
| /* Must be called with routing_table_lock_lha3 locked. */ |
| static struct msm_ipc_routing_table_entry *lookup_routing_table( |
| uint32_t node_id) |
| { |
| uint32_t 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; |
| } |
| |
| 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); |
| pr_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)) |
| wake_unlock(&xprt_info->wakelock); |
| 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(struct rr_packet), GFP_KERNEL); |
| if (!cloned_pkt) { |
| pr_err("%s: failure\n", __func__); |
| return NULL; |
| } |
| |
| pkt_fragment_q = kmalloc(sizeof(struct sk_buff_head), GFP_KERNEL); |
| if (!pkt_fragment_q) { |
| pr_err("%s: pkt_frag_q alloc failure\n", __func__); |
| kfree(cloned_pkt); |
| return NULL; |
| } |
| skb_queue_head_init(pkt_fragment_q); |
| |
| 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; |
| 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); |
| kfree(cloned_pkt); |
| return NULL; |
| } |
| |
| struct rr_packet *create_pkt(struct sk_buff_head *data) |
| { |
| struct rr_packet *pkt; |
| struct sk_buff *temp_skb; |
| |
| pkt = kzalloc(sizeof(struct rr_packet), GFP_KERNEL); |
| if (!pkt) { |
| pr_err("%s: failure\n", __func__); |
| return NULL; |
| } |
| |
| pkt->pkt_fragment_q = data; |
| skb_queue_walk(pkt->pkt_fragment_q, temp_skb) |
| pkt->length += temp_skb->len; |
| 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); |
| kfree(pkt); |
| return; |
| } |
| |
| 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; |
| |
| skb_head = kmalloc(sizeof(struct sk_buff_head), GFP_KERNEL); |
| if (!skb_head) { |
| pr_err("%s: Couldnot allocate skb_head\n", __func__); |
| return NULL; |
| } |
| skb_queue_head_init(skb_head); |
| |
| data_size = buf_len; |
| while (offset != buf_len) { |
| skb_size = data_size; |
| if (first) |
| skb_size += IPC_ROUTER_HDR_SIZE; |
| |
| skb = alloc_skb(skb_size, GFP_KERNEL); |
| if (!skb) { |
| if (skb_size <= (PAGE_SIZE/2)) { |
| pr_err("%s: cannot allocate skb\n", __func__); |
| goto buf_to_skb_error; |
| } |
| data_size = data_size / 2; |
| 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; |
| } |
| 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; |
| int offset = 0, buf_len = 0, copy_len; |
| void *buf; |
| |
| if (!skb_head) { |
| pr_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) { |
| pr_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; |
| } |
| |
| static 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); |
| } |
| |
| 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 event, void *priv); |
| |
| if (unlikely(!port_ptr || !pkt)) |
| return -EINVAL; |
| |
| if (clone) { |
| temp_pkt = clone_pkt(pkt); |
| if (!temp_pkt) { |
| pr_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_lhb3); |
| wake_lock(&port_ptr->port_rx_wake_lock); |
| list_add_tail(&temp_pkt->list, &port_ptr->port_rx_q); |
| wake_up(&port_ptr->port_rx_wait_q); |
| notify = port_ptr->notify; |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| if (notify) |
| notify(MSM_IPC_ROUTER_READ_CB, port_ptr->priv); |
| return 0; |
| } |
| |
| 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 uint32_t allocate_port_id(void) |
| { |
| uint32_t port_id = 0, prev_port_id, key; |
| struct msm_ipc_port *port_ptr; |
| |
| mutex_lock(&next_port_id_lock_lha1); |
| prev_port_id = next_port_id; |
| down_read(&local_ports_lock_lha2); |
| do { |
| next_port_id++; |
| if ((next_port_id & 0xFFFFFFFE) == 0xFFFFFFFE) |
| 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_lha2); |
| mutex_unlock(&next_port_id_lock_lha1); |
| |
| return port_id; |
| } |
| |
| void msm_ipc_router_add_local_port(struct msm_ipc_port *port_ptr) |
| { |
| uint32_t key; |
| |
| if (!port_ptr) |
| return; |
| |
| key = (port_ptr->this_port.port_id & (LP_HASH_SIZE - 1)); |
| down_write(&local_ports_lock_lha2); |
| list_add_tail(&port_ptr->list, &local_ports[key]); |
| up_write(&local_ports_lock_lha2); |
| } |
| |
| struct msm_ipc_port *msm_ipc_router_create_raw_port(void *endpoint, |
| void (*notify)(unsigned event, void *priv), |
| void *priv) |
| { |
| struct msm_ipc_port *port_ptr; |
| |
| port_ptr = kzalloc(sizeof(struct msm_ipc_port), 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) { |
| pr_err("%s: All port ids are in use\n", __func__); |
| kfree(port_ptr); |
| return NULL; |
| } |
| |
| spin_lock_init(&port_ptr->port_lock); |
| INIT_LIST_HEAD(&port_ptr->port_rx_q); |
| mutex_init(&port_ptr->port_rx_q_lock_lhb3); |
| init_waitqueue_head(&port_ptr->port_rx_wait_q); |
| snprintf(port_ptr->rx_wakelock_name, MAX_WAKELOCK_NAME_SZ, |
| "ipc%08x_%s", |
| port_ptr->this_port.port_id, |
| current->comm); |
| wake_lock_init(&port_ptr->port_rx_wake_lock, |
| WAKE_LOCK_SUSPEND, port_ptr->rx_wakelock_name); |
| |
| port_ptr->endpoint = endpoint; |
| port_ptr->notify = notify; |
| port_ptr->priv = priv; |
| |
| msm_ipc_router_add_local_port(port_ptr); |
| return port_ptr; |
| } |
| |
| /* Must be called with local_ports_lock_lha2 locked. */ |
| static struct msm_ipc_port *msm_ipc_router_lookup_local_port(uint32_t port_id) |
| { |
| int key = (port_id & (LP_HASH_SIZE - 1)); |
| struct msm_ipc_port *port_ptr; |
| |
| list_for_each_entry(port_ptr, &local_ports[key], list) { |
| if (port_ptr->this_port.port_id == port_id) { |
| return port_ptr; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Must be called with routing_table_lock_lha3 locked. */ |
| static struct msm_ipc_router_remote_port *msm_ipc_router_lookup_remote_port( |
| uint32_t node_id, |
| uint32_t 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 = lookup_routing_table(node_id); |
| if (!rt_entry) { |
| pr_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) { |
| up_read(&rt_entry->lock_lha4); |
| return rport_ptr; |
| } |
| } |
| up_read(&rt_entry->lock_lha4); |
| return NULL; |
| } |
| |
| /* Must be called with routing_table_lock_lha3 locked. */ |
| static struct msm_ipc_router_remote_port *msm_ipc_router_create_remote_port( |
| uint32_t node_id, |
| uint32_t 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 = lookup_routing_table(node_id); |
| if (!rt_entry) { |
| pr_err("%s: Node is not up\n", __func__); |
| return NULL; |
| } |
| |
| rport_ptr = kmalloc(sizeof(struct msm_ipc_router_remote_port), |
| GFP_KERNEL); |
| if (!rport_ptr) { |
| pr_err("%s: Remote port alloc failed\n", __func__); |
| return NULL; |
| } |
| rport_ptr->port_id = port_id; |
| rport_ptr->node_id = node_id; |
| rport_ptr->sec_rule = NULL; |
| rport_ptr->server = NULL; |
| rport_ptr->tx_quota_cnt = 0; |
| mutex_init(&rport_ptr->quota_lock_lhb2); |
| INIT_LIST_HEAD(&rport_ptr->resume_tx_port_list); |
| down_write(&rt_entry->lock_lha4); |
| list_add_tail(&rport_ptr->list, |
| &rt_entry->remote_port_list[key]); |
| up_write(&rt_entry->lock_lha4); |
| 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->quota_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->quota_lock_lhb2 locked. |
| */ |
| static int msm_ipc_router_lookup_resume_tx_port( |
| struct msm_ipc_router_remote_port *rport_ptr, uint32_t 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; |
| } |
| |
| /** |
| * 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 |
| * |
| * 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->quota_lock_lhb2 locked. |
| */ |
| static void post_resume_tx(struct msm_ipc_router_remote_port *rport_ptr, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_resume_tx_port *rtx_port, *tmp_rtx_port; |
| struct msm_ipc_port *local_port; |
| |
| list_for_each_entry_safe(rtx_port, tmp_rtx_port, |
| &rport_ptr->resume_tx_port_list, list) { |
| local_port = |
| msm_ipc_router_lookup_local_port(rtx_port->port_id); |
| if (local_port && local_port->notify) |
| local_port->notify(MSM_IPC_ROUTER_RESUME_TX, |
| local_port->priv); |
| else if (local_port) |
| post_pkt_to_port(local_port, pkt, 1); |
| else |
| pr_err("%s: Local Port %d not Found", |
| __func__, rtx_port->port_id); |
| list_del(&rtx_port->list); |
| kfree(rtx_port); |
| } |
| } |
| |
| /* Must be called with routing_table_lock_lha3 locked. */ |
| static void msm_ipc_router_destroy_remote_port( |
| struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| uint32_t node_id; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| if (!rport_ptr) |
| return; |
| |
| node_id = rport_ptr->node_id; |
| rt_entry = lookup_routing_table(node_id); |
| if (!rt_entry) { |
| pr_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); |
| mutex_lock(&rport_ptr->quota_lock_lhb2); |
| msm_ipc_router_free_resume_tx_port(rport_ptr); |
| mutex_unlock(&rport_ptr->quota_lock_lhb2); |
| kfree(rport_ptr); |
| return; |
| } |
| |
| /** |
| * 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( |
| uint32_t service, |
| uint32_t instance, |
| uint32_t node_id, |
| uint32_t 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; |
| } |
| |
| static void dummy_release(struct device *dev) |
| { |
| } |
| |
| /** |
| * 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. |
| * Note: Lock the server_list_lock_lha2 before accessing this function. |
| */ |
| static struct msm_ipc_server *msm_ipc_router_create_server( |
| uint32_t service, |
| uint32_t instance, |
| uint32_t node_id, |
| uint32_t port_id, |
| struct msm_ipc_router_xprt_info *xprt_info) |
| { |
| struct msm_ipc_server *server = NULL; |
| 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)) |
| goto create_srv_port; |
| } |
| |
| server = kzalloc(sizeof(struct msm_ipc_server), GFP_KERNEL); |
| if (!server) { |
| pr_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); |
| list_add_tail(&server->list, &server_list[key]); |
| scnprintf(server->pdev_name, sizeof(server->pdev_name), |
| "QMI%08x:%08x", service, instance); |
| server->next_pdev_id = 1; |
| |
| create_srv_port: |
| server_port = kzalloc(sizeof(struct msm_ipc_server_port), GFP_KERNEL); |
| if (!server_port) { |
| if (list_empty(&server->server_port_list)) { |
| list_del(&server->list); |
| kfree(server); |
| } |
| pr_err("%s: Server Port allocation failed\n", __func__); |
| return NULL; |
| } |
| 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_port->pdev.name = server->pdev_name; |
| server_port->pdev.id = server->next_pdev_id++; |
| server_port->pdev.dev.release = dummy_release; |
| platform_device_register(&server_port->pdev); |
| |
| return server; |
| } |
| |
| /** |
| * msm_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. |
| * Note: Lock the server_list_lock_lha2 before accessing this function. |
| */ |
| static void msm_ipc_router_destroy_server(struct msm_ipc_server *server, |
| uint32_t node_id, uint32_t port_id) |
| { |
| struct msm_ipc_server_port *server_port; |
| |
| 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)) |
| break; |
| } |
| if (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); |
| kfree(server); |
| } |
| return; |
| } |
| |
| static int msm_ipc_router_send_control_msg( |
| struct msm_ipc_router_xprt_info *xprt_info, |
| union rr_control_msg *msg) |
| { |
| struct rr_packet *pkt; |
| struct sk_buff *ipc_rtr_pkt; |
| struct rr_header *hdr; |
| int pkt_size; |
| void *data; |
| struct sk_buff_head *pkt_fragment_q; |
| int ret; |
| |
| if (!xprt_info || ((msg->cmd != IPC_ROUTER_CTRL_CMD_HELLO) && |
| !xprt_info->initialized)) { |
| pr_err("%s: xprt_info not initialized\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (xprt_info->remote_node_id == IPC_ROUTER_NID_LOCAL) |
| return 0; |
| |
| pkt = kzalloc(sizeof(struct rr_packet), GFP_KERNEL); |
| if (!pkt) { |
| pr_err("%s: pkt alloc failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| pkt_fragment_q = kmalloc(sizeof(struct sk_buff_head), GFP_KERNEL); |
| if (!pkt_fragment_q) { |
| pr_err("%s: pkt_fragment_q alloc failed\n", __func__); |
| kfree(pkt); |
| return -ENOMEM; |
| } |
| skb_queue_head_init(pkt_fragment_q); |
| |
| pkt_size = IPC_ROUTER_HDR_SIZE + sizeof(*msg); |
| ipc_rtr_pkt = alloc_skb(pkt_size, GFP_KERNEL); |
| if (!ipc_rtr_pkt) { |
| pr_err("%s: ipc_rtr_pkt alloc failed\n", __func__); |
| kfree(pkt_fragment_q); |
| kfree(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)); |
| hdr = (struct rr_header *)skb_push(ipc_rtr_pkt, IPC_ROUTER_HDR_SIZE); |
| if (!hdr) { |
| pr_err("%s: skb_push failed\n", __func__); |
| kfree_skb(ipc_rtr_pkt); |
| kfree(pkt_fragment_q); |
| kfree(pkt); |
| return -ENOMEM; |
| } |
| |
| hdr->version = IPC_ROUTER_VERSION; |
| hdr->type = msg->cmd; |
| hdr->src_node_id = IPC_ROUTER_NID_LOCAL; |
| hdr->src_port_id = IPC_ROUTER_ADDRESS; |
| hdr->confirm_rx = 0; |
| hdr->size = sizeof(*msg); |
| hdr->dst_node_id = xprt_info->remote_node_id; |
| hdr->dst_port_id = IPC_ROUTER_ADDRESS; |
| skb_queue_tail(pkt_fragment_q, ipc_rtr_pkt); |
| pkt->pkt_fragment_q = pkt_fragment_q; |
| pkt->length = pkt_size; |
| |
| mutex_lock(&xprt_info->tx_lock_lhb2); |
| ret = xprt_info->xprt->write(pkt, pkt_size, xprt_info->xprt); |
| mutex_unlock(&xprt_info->tx_lock_lhb2); |
| |
| release_pkt(pkt); |
| return ret; |
| } |
| |
| static int msm_ipc_router_send_server_list(uint32_t 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) { |
| pr_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; |
| msm_ipc_router_send_control_msg(xprt_info, |
| &ctl); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| #if defined(DEBUG) |
| static char *type_to_str(int i) |
| { |
| switch (i) { |
| case IPC_ROUTER_CTRL_CMD_DATA: |
| return "data "; |
| case IPC_ROUTER_CTRL_CMD_HELLO: |
| return "hello "; |
| case IPC_ROUTER_CTRL_CMD_BYE: |
| return "bye "; |
| case IPC_ROUTER_CTRL_CMD_NEW_SERVER: |
| return "new_srvr"; |
| case IPC_ROUTER_CTRL_CMD_REMOVE_SERVER: |
| return "rmv_srvr"; |
| case IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT: |
| return "rmv_clnt"; |
| case IPC_ROUTER_CTRL_CMD_RESUME_TX: |
| return "resum_tx"; |
| case IPC_ROUTER_CTRL_CMD_EXIT: |
| return "cmd_exit"; |
| default: |
| return "invalid"; |
| } |
| } |
| #endif |
| |
| static int broadcast_ctl_msg_locally(union rr_control_msg *msg) |
| { |
| struct rr_packet *pkt; |
| struct sk_buff *ipc_rtr_pkt; |
| struct rr_header *hdr; |
| int pkt_size; |
| void *data; |
| struct sk_buff_head *pkt_fragment_q; |
| int ret; |
| |
| pkt = kzalloc(sizeof(struct rr_packet), GFP_KERNEL); |
| if (!pkt) { |
| pr_err("%s: pkt alloc failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| pkt_fragment_q = kmalloc(sizeof(struct sk_buff_head), GFP_KERNEL); |
| if (!pkt_fragment_q) { |
| pr_err("%s: pkt_fragment_q alloc failed\n", __func__); |
| kfree(pkt); |
| return -ENOMEM; |
| } |
| skb_queue_head_init(pkt_fragment_q); |
| |
| pkt_size = IPC_ROUTER_HDR_SIZE + sizeof(*msg); |
| ipc_rtr_pkt = alloc_skb(pkt_size, GFP_KERNEL); |
| if (!ipc_rtr_pkt) { |
| pr_err("%s: ipc_rtr_pkt alloc failed\n", __func__); |
| kfree(pkt_fragment_q); |
| kfree(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)); |
| hdr = (struct rr_header *)skb_push(ipc_rtr_pkt, IPC_ROUTER_HDR_SIZE); |
| if (!hdr) { |
| pr_err("%s: skb_push failed\n", __func__); |
| kfree_skb(ipc_rtr_pkt); |
| kfree(pkt_fragment_q); |
| kfree(pkt); |
| return -ENOMEM; |
| } |
| hdr->version = IPC_ROUTER_VERSION; |
| hdr->type = msg->cmd; |
| hdr->src_node_id = IPC_ROUTER_NID_LOCAL; |
| hdr->src_port_id = IPC_ROUTER_ADDRESS; |
| hdr->confirm_rx = 0; |
| hdr->size = sizeof(*msg); |
| hdr->dst_node_id = IPC_ROUTER_NID_LOCAL; |
| hdr->dst_port_id = IPC_ROUTER_ADDRESS; |
| skb_queue_tail(pkt_fragment_q, ipc_rtr_pkt); |
| pkt->pkt_fragment_q = pkt_fragment_q; |
| pkt->length = pkt_size; |
| |
| ret = post_control_ports(pkt); |
| release_pkt(pkt); |
| return ret; |
| } |
| |
| 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) { |
| msm_ipc_router_send_control_msg(xprt_info, ctl); |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| |
| 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) |
| msm_ipc_router_send_control_msg(fwd_xprt_info, ctl); |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| |
| return 0; |
| } |
| |
| static int relay_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| struct rr_packet *pkt) |
| { |
| struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| |
| if (!xprt_info || !pkt) |
| return -EINVAL; |
| |
| down_read(&xprt_info_list_lock_lha5); |
| list_for_each_entry(fwd_xprt_info, &xprt_info_list, list) { |
| mutex_lock(&fwd_xprt_info->tx_lock_lhb2); |
| if (xprt_info->xprt->link_id != fwd_xprt_info->xprt->link_id) |
| fwd_xprt_info->xprt->write(pkt, pkt->length, |
| fwd_xprt_info->xprt); |
| mutex_unlock(&fwd_xprt_info->tx_lock_lhb2); |
| } |
| 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) |
| { |
| uint32_t dst_node_id; |
| struct sk_buff *head_pkt; |
| struct rr_header *hdr; |
| struct msm_ipc_router_xprt_info *fwd_xprt_info; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| int ret = 0; |
| |
| if (!xprt_info || !pkt) |
| return -EINVAL; |
| |
| head_pkt = skb_peek(pkt->pkt_fragment_q); |
| if (!head_pkt) |
| return -EINVAL; |
| |
| hdr = (struct rr_header *)head_pkt->data; |
| dst_node_id = hdr->dst_node_id; |
| down_read(&routing_table_lock_lha3); |
| rt_entry = lookup_routing_table(dst_node_id); |
| if (!(rt_entry) || !(rt_entry->xprt_info)) { |
| up_read(&routing_table_lock_lha3); |
| pr_err("%s: Routing table not initialized\n", __func__); |
| return -ENODEV; |
| } |
| |
| down_read(&rt_entry->lock_lha4); |
| fwd_xprt_info = rt_entry->xprt_info; |
| if (xprt_info->remote_node_id == fwd_xprt_info->remote_node_id) { |
| pr_err("%s: Discarding Command to route back\n", __func__); |
| ret = -EINVAL; |
| goto fwd_msg_out; |
| } |
| |
| if (xprt_info->xprt->link_id == fwd_xprt_info->xprt->link_id) { |
| pr_err("%s: DST in the same cluster\n", __func__); |
| goto fwd_msg_out; |
| } |
| mutex_lock(&fwd_xprt_info->tx_lock_lhb2); |
| fwd_xprt_info->xprt->write(pkt, pkt->length, fwd_xprt_info->xprt); |
| mutex_unlock(&fwd_xprt_info->tx_lock_lhb2); |
| fwd_msg_out: |
| up_read(&rt_entry->lock_lha4); |
| up_read(&routing_table_lock_lha3); |
| |
| return ret; |
| } |
| |
| static int msm_ipc_router_send_remove_client(struct comm_mode_info *mode_info, |
| uint32_t node_id, uint32_t 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) { |
| pr_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; |
| msm_ipc_router_send_control_msg(tmp_xprt_info, &msg); |
| 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); |
| broadcast_ctl_msg_locally(&msg); |
| } else if (mode != NULL_MODE) { |
| pr_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) { |
| pr_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; |
| } |
| |
| return; |
| } |
| |
| static void cleanup_rmt_server(struct msm_ipc_router_xprt_info *xprt_info, |
| struct msm_ipc_router_remote_port *rport_ptr) |
| { |
| union rr_control_msg ctl; |
| struct msm_ipc_server *server = rport_ptr->server; |
| |
| D("Remove server %08x:%08x - %08x:%08x", |
| server->name.service, server->name.instance, |
| rport_ptr->node_id, rport_ptr->port_id); |
| 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; |
| relay_ctl_msg(xprt_info, &ctl); |
| broadcast_ctl_msg_locally(&ctl); |
| msm_ipc_router_destroy_server(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; |
| 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->quota_lock_lhb2); |
| msm_ipc_router_free_resume_tx_port(rport_ptr); |
| mutex_unlock(&rport_ptr->quota_lock_lhb2); |
| |
| if (rport_ptr->server) |
| cleanup_rmt_server(xprt_info, rport_ptr); |
| |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_REMOVE_CLIENT; |
| ctl.cli.node_id = rport_ptr->node_id; |
| ctl.cli.port_id = rport_ptr->port_id; |
| relay_ctl_msg(xprt_info, &ctl); |
| broadcast_ctl_msg_locally(&ctl); |
| kfree(rport_ptr); |
| } |
| } |
| } |
| |
| 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; |
| |
| if (!xprt_info) { |
| pr_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(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); |
| } |
| } |
| 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; |
| |
| down_read(&routing_table_lock_lha3); |
| list_for_each_entry(server_port, &server->server_port_list, list) { |
| rport_ptr = msm_ipc_router_lookup_remote_port( |
| server_port->server_addr.node_id, |
| server_port->server_addr.port_id); |
| if (!rport_ptr) |
| continue; |
| rport_ptr->sec_rule = rule; |
| } |
| up_read(&routing_table_lock_lha3); |
| 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(uint32_t service, uint32_t 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); |
| } |
| |
| static int process_hello_msg(struct msm_ipc_router_xprt_info *xprt_info, |
| struct rr_header *hdr) |
| { |
| int i, rc = 0; |
| union rr_control_msg ctl; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| if (!hdr) |
| return -EINVAL; |
| |
| RR("o HELLO NID %d\n", hdr->src_node_id); |
| |
| xprt_info->remote_node_id = hdr->src_node_id; |
| /* |
| * Find the entry from Routing Table corresponding to Node ID. |
| * Under SSR, an entry will be found. When the system boots up |
| * for the 1st time, an entry will not be found and hence allocate |
| * an entry. Update the entry with the Node ID that it corresponds |
| * to and the XPRT through which it can be reached. |
| */ |
| down_write(&routing_table_lock_lha3); |
| rt_entry = lookup_routing_table(hdr->src_node_id); |
| if (!rt_entry) { |
| rt_entry = alloc_routing_table_entry(hdr->src_node_id); |
| if (!rt_entry) { |
| up_write(&routing_table_lock_lha3); |
| pr_err("%s: rt_entry allocation failed\n", __func__); |
| return -ENOMEM; |
| } |
| add_routing_table_entry(rt_entry); |
| } |
| down_write(&rt_entry->lock_lha4); |
| rt_entry->neighbor_node_id = xprt_info->remote_node_id; |
| rt_entry->xprt_info = xprt_info; |
| up_write(&rt_entry->lock_lha4); |
| up_write(&routing_table_lock_lha3); |
| |
| /* Send a reply HELLO message */ |
| memset(&ctl, 0, sizeof(ctl)); |
| ctl.cmd = IPC_ROUTER_CTRL_CMD_HELLO; |
| rc = msm_ipc_router_send_control_msg(xprt_info, &ctl); |
| if (rc < 0) { |
| pr_err("%s: Error sending reply HELLO message\n", __func__); |
| 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); |
| RR("HELLO message processed\n"); |
| 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; |
| int ret = 0; |
| |
| RR("o RESUME_TX id=%d:%08x\n", msg->cli.node_id, msg->cli.port_id); |
| |
| down_read(&local_ports_lock_lha2); |
| down_read(&routing_table_lock_lha3); |
| rport_ptr = msm_ipc_router_lookup_remote_port(msg->cli.node_id, |
| msg->cli.port_id); |
| if (!rport_ptr) { |
| pr_err("%s: Unable to resume client\n", __func__); |
| ret = -ENODEV; |
| goto prtm_out; |
| } |
| mutex_lock(&rport_ptr->quota_lock_lhb2); |
| rport_ptr->tx_quota_cnt = 0; |
| post_resume_tx(rport_ptr, pkt); |
| mutex_unlock(&rport_ptr->quota_lock_lhb2); |
| prtm_out: |
| up_read(&routing_table_lock_lha3); |
| up_read(&local_ports_lock_lha2); |
| 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) { |
| pr_err("%s: Server %08x create rejected, version = 0\n", |
| __func__, msg->srv.service); |
| return -EINVAL; |
| } |
| |
| RR("o NEW_SERVER id=%d:%08x service=%08x:%08x\n", msg->srv.node_id, |
| msg->srv.port_id, msg->srv.service, msg->srv.instance); |
| /* |
| * Find the entry from Routing Table corresponding to Node ID. |
| * Under SSR, an entry will be found. When the subsystem hosting |
| * service is not adjacent, an entry will not be found and hence |
| * allocate an entry. Update the entry with the Node ID that it |
| * corresponds to and the XPRT through which it can be reached. |
| */ |
| down_write(&routing_table_lock_lha3); |
| rt_entry = lookup_routing_table(msg->srv.node_id); |
| if (!rt_entry) { |
| rt_entry = alloc_routing_table_entry(msg->srv.node_id); |
| if (!rt_entry) { |
| up_write(&routing_table_lock_lha3); |
| pr_err("%s: rt_entry allocation failed\n", __func__); |
| return -ENOMEM; |
| } |
| down_write(&rt_entry->lock_lha4); |
| rt_entry->neighbor_node_id = xprt_info->remote_node_id; |
| rt_entry->xprt_info = xprt_info; |
| up_write(&rt_entry->lock_lha4); |
| add_routing_table_entry(rt_entry); |
| } |
| up_write(&routing_table_lock_lha3); |
| |
| /* |
| * If the service does not exist already in the database, create and |
| * store the service info. Create a remote port structure in which |
| * the service is hosted and cache the security rule for the service |
| * in that remote port structure. |
| */ |
| down_write(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server(msg->srv.service, |
| msg->srv.instance, msg->srv.node_id, msg->srv.port_id); |
| if (!server) { |
| server = msm_ipc_router_create_server( |
| msg->srv.service, msg->srv.instance, |
| msg->srv.node_id, msg->srv.port_id, xprt_info); |
| if (!server) { |
| up_write(&server_list_lock_lha2); |
| pr_err("%s: Server Create failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| down_read(&routing_table_lock_lha3); |
| if (!msm_ipc_router_lookup_remote_port( |
| msg->srv.node_id, msg->srv.port_id)) { |
| rport_ptr = msm_ipc_router_create_remote_port( |
| msg->srv.node_id, msg->srv.port_id); |
| if (!rport_ptr) { |
| up_read(&routing_table_lock_lha3); |
| up_write(&server_list_lock_lha2); |
| return -ENOMEM; |
| } |
| rport_ptr->server = server; |
| rport_ptr->sec_rule = msm_ipc_get_security_rule( |
| msg->srv.service, |
| msg->srv.instance); |
| } |
| up_read(&routing_table_lock_lha3); |
| } |
| up_write(&server_list_lock_lha2); |
| |
| /* |
| * 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_msg(xprt_info, pkt); |
| 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; |
| |
| RR("o REMOVE_SERVER service=%08x:%d\n", |
| msg->srv.service, msg->srv.instance); |
| down_write(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server(msg->srv.service, |
| msg->srv.instance, msg->srv.node_id, msg->srv.port_id); |
| if (server) { |
| msm_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_msg(xprt_info, pkt); |
| post_control_ports(pkt); |
| } |
| up_write(&server_list_lock_lha2); |
| 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; |
| |
| RR("o REMOVE_CLIENT id=%d:%08x\n", msg->cli.node_id, msg->cli.port_id); |
| down_write(&routing_table_lock_lha3); |
| rport_ptr = msm_ipc_router_lookup_remote_port(msg->cli.node_id, |
| msg->cli.port_id); |
| if (rport_ptr) |
| msm_ipc_router_destroy_remote_port(rport_ptr); |
| up_write(&routing_table_lock_lha3); |
| |
| relay_msg(xprt_info, pkt); |
| 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 sk_buff *temp_ptr; |
| struct rr_header *hdr; |
| |
| if (pkt->length != (IPC_ROUTER_HDR_SIZE + sizeof(*msg))) { |
| pr_err("%s: r2r msg size %d != %d\n", __func__, pkt->length, |
| (IPC_ROUTER_HDR_SIZE + sizeof(*msg))); |
| return -EINVAL; |
| } |
| |
| temp_ptr = skb_peek(pkt->pkt_fragment_q); |
| if (!temp_ptr) { |
| pr_err("%s: pkt_fragment_q is empty\n", __func__); |
| return -EINVAL; |
| } |
| hdr = (struct rr_header *)temp_ptr->data; |
| if (!hdr) { |
| pr_err("%s: No data inside the skb\n", __func__); |
| return -EINVAL; |
| } |
| msg = (union rr_control_msg *)((char *)hdr + IPC_ROUTER_HDR_SIZE); |
| |
| switch (msg->cmd) { |
| case IPC_ROUTER_CTRL_CMD_HELLO: |
| rc = process_hello_msg(xprt_info, 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; |
| case IPC_ROUTER_CTRL_CMD_PING: |
| /* No action needed for ping messages received */ |
| RR("o PING\n"); |
| break; |
| default: |
| RR("o UNKNOWN(%08x)\n", msg->cmd); |
| rc = -ENOSYS; |
| } |
| |
| return rc; |
| } |
| |
| static void do_read_data(struct work_struct *work) |
| { |
| struct rr_header *hdr; |
| struct rr_packet *pkt = NULL; |
| struct msm_ipc_port *port_ptr; |
| struct sk_buff *head_skb; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| uint32_t resume_tx, resume_tx_node_id, resume_tx_port_id; |
| |
| 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) { |
| if (pkt->length < IPC_ROUTER_HDR_SIZE || |
| pkt->length > MAX_IPC_PKT_SIZE) { |
| pr_err("%s: Invalid pkt length %d\n", |
| __func__, pkt->length); |
| goto fail_data; |
| } |
| |
| head_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!head_skb) { |
| pr_err("%s: head_skb is invalid\n", __func__); |
| goto fail_data; |
| } |
| |
| hdr = (struct rr_header *)(head_skb->data); |
| RAW("ver=%d type=%d src=%d:%08x crx=%d siz=%d dst=%d:%08x\n", |
| hdr->version, hdr->type, hdr->src_node_id, |
| hdr->src_port_id, hdr->confirm_rx, hdr->size, |
| hdr->dst_node_id, hdr->dst_port_id); |
| |
| if (hdr->version != IPC_ROUTER_VERSION) { |
| pr_err("version %d != %d\n", |
| hdr->version, IPC_ROUTER_VERSION); |
| goto fail_data; |
| } |
| |
| if ((hdr->dst_node_id != IPC_ROUTER_NID_LOCAL) && |
| ((hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX) || |
| (hdr->type == IPC_ROUTER_CTRL_CMD_DATA))) { |
| forward_msg(xprt_info, pkt); |
| release_pkt(pkt); |
| continue; |
| } |
| |
| if ((hdr->dst_port_id == IPC_ROUTER_ADDRESS) || |
| (hdr->type == IPC_ROUTER_CTRL_CMD_HELLO)) { |
| process_control_msg(xprt_info, pkt); |
| release_pkt(pkt); |
| continue; |
| } |
| #if defined(CONFIG_MSM_SMD_LOGGING) |
| #if defined(DEBUG) |
| if (msm_ipc_router_debug_mask & SMEM_LOG) { |
| smem_log_event((SMEM_LOG_PROC_ID_APPS | |
| SMEM_LOG_IPC_ROUTER_EVENT_BASE | |
| IPC_ROUTER_LOG_EVENT_RX), |
| (hdr->src_node_id << 24) | |
| (hdr->src_port_id & 0xffffff), |
| (hdr->dst_node_id << 24) | |
| (hdr->dst_port_id & 0xffffff), |
| (hdr->type << 24) | (hdr->confirm_rx << 16) | |
| (hdr->size & 0xffff)); |
| } |
| #endif |
| #endif |
| |
| resume_tx = hdr->confirm_rx; |
| resume_tx_node_id = hdr->dst_node_id; |
| resume_tx_port_id = hdr->dst_port_id; |
| |
| down_read(&local_ports_lock_lha2); |
| port_ptr = msm_ipc_router_lookup_local_port(hdr->dst_port_id); |
| if (!port_ptr) { |
| pr_err("%s: No local port id %08x\n", __func__, |
| hdr->dst_port_id); |
| up_read(&local_ports_lock_lha2); |
| release_pkt(pkt); |
| goto process_done; |
| } |
| |
| down_read(&routing_table_lock_lha3); |
| rport_ptr = msm_ipc_router_lookup_remote_port(hdr->src_node_id, |
| hdr->src_port_id); |
| if (!rport_ptr) { |
| rport_ptr = msm_ipc_router_create_remote_port( |
| hdr->src_node_id, |
| hdr->src_port_id); |
| if (!rport_ptr) { |
| pr_err("%s: Rmt Prt %08x:%08x create failed\n", |
| __func__, hdr->src_node_id, |
| hdr->src_port_id); |
| up_read(&routing_table_lock_lha3); |
| up_read(&local_ports_lock_lha2); |
| goto process_done; |
| } |
| } |
| up_read(&routing_table_lock_lha3); |
| post_pkt_to_port(port_ptr, pkt, 0); |
| up_read(&local_ports_lock_lha2); |
| |
| process_done: |
| if (resume_tx) { |
| union rr_control_msg msg; |
| memset(&msg, 0, sizeof(msg)); |
| msg.cmd = IPC_ROUTER_CTRL_CMD_RESUME_TX; |
| msg.cli.node_id = resume_tx_node_id; |
| msg.cli.port_id = resume_tx_port_id; |
| |
| RR("x RESUME_TX id=%d:%08x\n", |
| msg.cli.node_id, msg.cli.port_id); |
| msm_ipc_router_send_control_msg(xprt_info, &msg); |
| } |
| |
| } |
| return; |
| |
| fail_data: |
| release_pkt(pkt); |
| pr_err("ipc_router has died\n"); |
| } |
| |
| int msm_ipc_router_register_server(struct msm_ipc_port *port_ptr, |
| struct msm_ipc_addr *name) |
| { |
| struct msm_ipc_server *server; |
| unsigned long flags; |
| union rr_control_msg ctl; |
| |
| if (!port_ptr || !name) |
| return -EINVAL; |
| |
| if (name->addrtype != MSM_IPC_ADDR_NAME) |
| return -EINVAL; |
| |
| down_write(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server(name->addr.port_name.service, |
| name->addr.port_name.instance, |
| IPC_ROUTER_NID_LOCAL, |
| port_ptr->this_port.port_id); |
| if (server) { |
| up_write(&server_list_lock_lha2); |
| pr_err("%s: Server already present\n", __func__); |
| return -EINVAL; |
| } |
| |
| 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) { |
| up_write(&server_list_lock_lha2); |
| pr_err("%s: Server Creation failed\n", __func__); |
| return -EINVAL; |
| } |
| |
| 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; |
| up_write(&server_list_lock_lha2); |
| broadcast_ctl_msg(&ctl); |
| spin_lock_irqsave(&port_ptr->port_lock, flags); |
| 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; |
| spin_unlock_irqrestore(&port_ptr->port_lock, flags); |
| return 0; |
| } |
| |
| int msm_ipc_router_unregister_server(struct msm_ipc_port *port_ptr) |
| { |
| struct msm_ipc_server *server; |
| unsigned long flags; |
| union rr_control_msg ctl; |
| |
| if (!port_ptr) |
| return -EINVAL; |
| |
| if (port_ptr->type != SERVER_PORT) { |
| pr_err("%s: Trying to unregister a non-server port\n", |
| __func__); |
| return -EINVAL; |
| } |
| |
| if (port_ptr->this_port.node_id != IPC_ROUTER_NID_LOCAL) { |
| pr_err("%s: Trying to unregister a remote server locally\n", |
| __func__); |
| return -EINVAL; |
| } |
| |
| down_write(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server(port_ptr->port_name.service, |
| port_ptr->port_name.instance, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| if (!server) { |
| up_write(&server_list_lock_lha2); |
| pr_err("%s: Server lookup failed\n", __func__); |
| return -ENODEV; |
| } |
| |
| 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; |
| msm_ipc_router_destroy_server(server, port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| up_write(&server_list_lock_lha2); |
| broadcast_ctl_msg(&ctl); |
| spin_lock_irqsave(&port_ptr->port_lock, flags); |
| port_ptr->type = CLIENT_PORT; |
| spin_unlock_irqrestore(&port_ptr->port_lock, flags); |
| return 0; |
| } |
| |
| static int loopback_data(struct msm_ipc_port *src, |
| uint32_t port_id, |
| struct sk_buff_head *data) |
| { |
| struct sk_buff *head_skb; |
| struct rr_header *hdr; |
| struct msm_ipc_port *port_ptr; |
| struct rr_packet *pkt; |
| int ret_len; |
| |
| if (!data) { |
| pr_err("%s: Invalid pkt pointer\n", __func__); |
| return -EINVAL; |
| } |
| |
| pkt = create_pkt(data); |
| if (!pkt) { |
| pr_err("%s: New pkt create failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| head_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!head_skb) { |
| pr_err("%s: pkt_fragment_q is empty\n", __func__); |
| release_pkt(pkt); |
| return -EINVAL; |
| } |
| hdr = (struct rr_header *)skb_push(head_skb, IPC_ROUTER_HDR_SIZE); |
| if (!hdr) { |
| pr_err("%s: Prepend Header failed\n", __func__); |
| release_pkt(pkt); |
| return -ENOMEM; |
| } |
| hdr->version = IPC_ROUTER_VERSION; |
| 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->confirm_rx = 0; |
| hdr->dst_node_id = IPC_ROUTER_NID_LOCAL; |
| hdr->dst_port_id = port_id; |
| pkt->length += IPC_ROUTER_HDR_SIZE; |
| |
| down_read(&local_ports_lock_lha2); |
| port_ptr = msm_ipc_router_lookup_local_port(port_id); |
| if (!port_ptr) { |
| pr_err("%s: Local port %d not present\n", __func__, port_id); |
| up_read(&local_ports_lock_lha2); |
| release_pkt(pkt); |
| return -ENODEV; |
| } |
| |
| ret_len = pkt->length; |
| post_pkt_to_port(port_ptr, pkt, 0); |
| update_comm_mode_info(&src->mode_info, NULL); |
| up_read(&local_ports_lock_lha2); |
| |
| return ret_len; |
| } |
| |
| static int msm_ipc_router_write_pkt(struct msm_ipc_port *src, |
| struct msm_ipc_router_remote_port *rport_ptr, |
| struct rr_packet *pkt) |
| { |
| struct sk_buff *head_skb; |
| struct rr_header *hdr; |
| struct msm_ipc_router_xprt_info *xprt_info; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| struct msm_ipc_resume_tx_port *resume_tx_port; |
| int ret; |
| |
| if (!rport_ptr || !src || !pkt) |
| return -EINVAL; |
| |
| head_skb = skb_peek(pkt->pkt_fragment_q); |
| if (!head_skb) { |
| pr_err("%s: pkt_fragment_q is empty\n", __func__); |
| return -EINVAL; |
| } |
| hdr = (struct rr_header *)skb_push(head_skb, IPC_ROUTER_HDR_SIZE); |
| if (!hdr) { |
| pr_err("%s: Prepend Header failed\n", __func__); |
| return -ENOMEM; |
| } |
| hdr->version = IPC_ROUTER_VERSION; |
| 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->confirm_rx = 0; |
| hdr->dst_node_id = rport_ptr->node_id; |
| hdr->dst_port_id = rport_ptr->port_id; |
| pkt->length += IPC_ROUTER_HDR_SIZE; |
| |
| mutex_lock(&rport_ptr->quota_lock_lhb2); |
| if (rport_ptr->tx_quota_cnt == IPC_ROUTER_DEFAULT_RX_QUOTA) { |
| if (msm_ipc_router_lookup_resume_tx_port( |
| rport_ptr, src->this_port.port_id)) { |
| mutex_unlock(&rport_ptr->quota_lock_lhb2); |
| return -EAGAIN; |
| } |
| resume_tx_port = |
| kzalloc(sizeof(struct msm_ipc_resume_tx_port), |
| GFP_KERNEL); |
| if (!resume_tx_port) { |
| pr_err("%s: Resume_Tx port allocation failed\n", |
| __func__); |
| mutex_unlock(&rport_ptr->quota_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); |
| mutex_unlock(&rport_ptr->quota_lock_lhb2); |
| return -EAGAIN; |
| } |
| rport_ptr->tx_quota_cnt++; |
| if (rport_ptr->tx_quota_cnt == IPC_ROUTER_DEFAULT_RX_QUOTA) |
| hdr->confirm_rx = 1; |
| mutex_unlock(&rport_ptr->quota_lock_lhb2); |
| |
| rt_entry = lookup_routing_table(hdr->dst_node_id); |
| if (!rt_entry || !rt_entry->xprt_info) { |
| pr_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; |
| 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); |
| up_read(&rt_entry->lock_lha4); |
| |
| if (ret < 0) { |
| pr_err("%s: Write on XPRT failed\n", __func__); |
| return ret; |
| } |
| update_comm_mode_info(&src->mode_info, xprt_info); |
| |
| RAW_HDR("[w rr_h] " |
| "ver=%i,type=%s,src_nid=%08x,src_port_id=%08x," |
| "confirm_rx=%i,size=%3i,dst_pid=%08x,dst_cid=%08x\n", |
| hdr->version, type_to_str(hdr->type), |
| hdr->src_node_id, hdr->src_port_id, |
| hdr->confirm_rx, hdr->size, |
| hdr->dst_node_id, hdr->dst_port_id); |
| |
| #if defined(CONFIG_MSM_SMD_LOGGING) |
| #if defined(DEBUG) |
| if (msm_ipc_router_debug_mask & SMEM_LOG) { |
| smem_log_event((SMEM_LOG_PROC_ID_APPS | |
| SMEM_LOG_IPC_ROUTER_EVENT_BASE | |
| IPC_ROUTER_LOG_EVENT_TX), |
| (hdr->src_node_id << 24) | |
| (hdr->src_port_id & 0xffffff), |
| (hdr->dst_node_id << 24) | |
| (hdr->dst_port_id & 0xffffff), |
| (hdr->type << 24) | (hdr->confirm_rx << 16) | |
| (hdr->size & 0xffff)); |
| } |
| #endif |
| #endif |
| |
| return pkt->length; |
| } |
| |
| int msm_ipc_router_send_to(struct msm_ipc_port *src, |
| struct sk_buff_head *data, |
| struct msm_ipc_addr *dest) |
| { |
| uint32_t 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 rr_packet *pkt; |
| int ret; |
| |
| if (!src || !data || !dest) { |
| pr_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) { |
| down_read(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server( |
| dest->addr.port_name.service, |
| dest->addr.port_name.instance, |
| 0, 0); |
| if (!server) { |
| up_read(&server_list_lock_lha2); |
| pr_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; |
| up_read(&server_list_lock_lha2); |
| } |
| if (dst_node_id == IPC_ROUTER_NID_LOCAL) { |
| ret = loopback_data(src, dst_port_id, data); |
| return ret; |
| } |
| |
| down_read(&routing_table_lock_lha3); |
| rport_ptr = msm_ipc_router_lookup_remote_port(dst_node_id, |
| dst_port_id); |
| if (!rport_ptr) { |
| up_read(&routing_table_lock_lha3); |
| pr_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) { |
| up_read(&routing_table_lock_lha3); |
| pr_err("%s: permission failure for %s\n", |
| __func__, current->comm); |
| return -EPERM; |
| } |
| } |
| |
| pkt = create_pkt(data); |
| if (!pkt) { |
| up_read(&routing_table_lock_lha3); |
| pr_err("%s: Pkt creation failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| ret = msm_ipc_router_write_pkt(src, rport_ptr, pkt); |
| up_read(&routing_table_lock_lha3); |
| 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) { |
| pr_err("%s: SKB conversion failed\n", __func__); |
| return -EFAULT; |
| } |
| |
| ret = msm_ipc_router_send_to(src, out_skb_head, dest); |
| if (ret == -EAGAIN) |
| return ret; |
| if (ret < 0) { |
| pr_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; |
| } |
| |
| int msm_ipc_router_read(struct msm_ipc_port *port_ptr, |
| struct sk_buff_head **data, |
| size_t buf_len) |
| { |
| struct rr_packet *pkt; |
| int ret; |
| |
| if (!port_ptr || !data) |
| return -EINVAL; |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhb3); |
| if (list_empty(&port_ptr->port_rx_q)) { |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| return -EAGAIN; |
| } |
| |
| pkt = list_first_entry(&port_ptr->port_rx_q, struct rr_packet, list); |
| if ((buf_len) && ((pkt->length - IPC_ROUTER_HDR_SIZE) > buf_len)) { |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| return -ETOOSMALL; |
| } |
| list_del(&pkt->list); |
| if (list_empty(&port_ptr->port_rx_q)) |
| wake_unlock(&port_ptr->port_rx_wake_lock); |
| *data = pkt->pkt_fragment_q; |
| ret = pkt->length; |
| kfree(pkt); |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| |
| return ret; |
| } |
| |
| /** |
| * 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_lhb3); |
| while (list_empty(&port_ptr->port_rx_q)) { |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| 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_lhb3); |
| } |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| |
| return ret; |
| } |
| |
| /** |
| * msm_ipc_router_recv_from() - Recieve messages destined to a local port. |
| * @port_ptr: Pointer to the local port |
| * @data : Pointer to the socket buffer head |
| * @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 sk_buff_head **data, |
| struct msm_ipc_addr *src, |
| long timeout) |
| { |
| int ret, data_len, align_size; |
| struct sk_buff *temp_skb; |
| struct rr_header *hdr = NULL; |
| |
| if (!port_ptr || !data) { |
| pr_err("%s: Invalid pointers being passed\n", __func__); |
| return -EINVAL; |
| } |
| |
| *data = NULL; |
| |
| ret = msm_ipc_router_rx_data_wait(port_ptr, timeout); |
| if (ret) |
| return ret; |
| |
| ret = msm_ipc_router_read(port_ptr, data, 0); |
| if (ret <= 0 || !(*data)) |
| return ret; |
| |
| temp_skb = skb_peek(*data); |
| hdr = (struct rr_header *)(temp_skb->data); |
| 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; |
| skb_pull(temp_skb, IPC_ROUTER_HDR_SIZE); |
| align_size = ALIGN_SIZE(data_len); |
| if (align_size) { |
| temp_skb = skb_peek_tail(*data); |
| 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 sk_buff_head *in_skb_head; |
| int ret; |
| |
| ret = msm_ipc_router_recv_from(port_ptr, &in_skb_head, src, 0); |
| |
| if (ret < 0) { |
| if (ret != -ENOMSG) |
| pr_err("%s: msm_ipc_router_recv_from failed - ret: %d\n", |
| __func__, ret); |
| return ret; |
| } |
| |
| *data = msm_ipc_router_skb_to_buf(in_skb_head, ret); |
| if (!(*data)) |
| pr_err("%s: Buf conversion failed\n", __func__); |
| |
| *len = ret; |
| msm_ipc_router_free_skb(in_skb_head); |
| return 0; |
| } |
| |
| struct msm_ipc_port *msm_ipc_router_create_port( |
| void (*notify)(unsigned event, void *priv), |
| void *priv) |
| { |
| struct msm_ipc_port *port_ptr; |
| int ret; |
| |
| ret = wait_for_completion_interruptible(&msm_ipc_local_router_up); |
| if (ret < 0) { |
| pr_err("%s: Error waiting for local router\n", __func__); |
| return NULL; |
| } |
| |
| port_ptr = msm_ipc_router_create_raw_port(NULL, notify, priv); |
| if (!port_ptr) |
| pr_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 rr_packet *pkt, *temp_pkt; |
| struct msm_ipc_server *server; |
| |
| if (!port_ptr) |
| return -EINVAL; |
| |
| if (port_ptr->type == SERVER_PORT || port_ptr->type == CLIENT_PORT) { |
| down_write(&local_ports_lock_lha2); |
| list_del(&port_ptr->list); |
| up_write(&local_ports_lock_lha2); |
| |
| if (port_ptr->type == SERVER_PORT) { |
| 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; |
| RR("x REMOVE_SERVER Name=%d:%08x Id=%d:%08x\n", |
| msg.srv.service, msg.srv.instance, |
| msg.srv.node_id, msg.srv.port_id); |
| broadcast_ctl_msg(&msg); |
| broadcast_ctl_msg_locally(&msg); |
| } |
| |
| /* |
| * Server port could have been a client port earlier. |
| * Send REMOVE_CLIENT message in either case. |
| */ |
| RR("x REMOVE_CLIENT id=%d:%08x\n", |
| port_ptr->this_port.node_id, port_ptr->this_port.port_id); |
| 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_lha2); |
| list_del(&port_ptr->list); |
| up_write(&local_ports_lock_lha2); |
| signal_irsc_completion(); |
| } |
| |
| mutex_lock(&port_ptr->port_rx_q_lock_lhb3); |
| 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_lhb3); |
| |
| if (port_ptr->type == SERVER_PORT) { |
| down_write(&server_list_lock_lha2); |
| server = msm_ipc_router_lookup_server( |
| port_ptr->port_name.service, |
| port_ptr->port_name.instance, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| if (server) |
| msm_ipc_router_destroy_server(server, |
| port_ptr->this_port.node_id, |
| port_ptr->this_port.port_id); |
| up_write(&server_list_lock_lha2); |
| } |
| |
| wake_lock_destroy(&port_ptr->port_rx_wake_lock); |
| kfree(port_ptr); |
| 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_lhb3); |
| if (!list_empty(&port_ptr->port_rx_q)) { |
| pkt = list_first_entry(&port_ptr->port_rx_q, |
| struct rr_packet, list); |
| rc = pkt->length; |
| } |
| mutex_unlock(&port_ptr->port_rx_q_lock_lhb3); |
| |
| return rc; |
| } |
| |
| int msm_ipc_router_bind_control_port(struct msm_ipc_port *port_ptr) |
| { |
| if (!port_ptr) |
| return -EINVAL; |
| |
| down_write(&local_ports_lock_lha2); |
| list_del(&port_ptr->list); |
| up_write(&local_ports_lock_lha2); |
| 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, |
| uint32_t lookup_mask) |
| { |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| int key, i = 0; /*num_entries_found*/ |
| |
| if (!srv_name) { |
| pr_err("%s: Invalid srv_name\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (num_entries_in_array && !srv_info) { |
| pr_err("%s: srv_info NULL\n", __func__); |
| return -EINVAL; |
| } |
| |
| down_read(&server_list_lock_lha2); |
| if (!lookup_mask) |
| lookup_mask = 0xFFFFFFFF; |
| 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; |
| } |
| |
| #if defined(CONFIG_DEBUG_FS) |
| static int dump_routing_table(char *buf, int max) |
| { |
| int i = 0, j; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| 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); |
| i += scnprintf(buf + i, max - i, |
| "Node Id: 0x%08x\n", rt_entry->node_id); |
| if (rt_entry->node_id == IPC_ROUTER_NID_LOCAL) { |
| i += scnprintf(buf + i, max - i, |
| "XPRT Name: Loopback\n"); |
| i += scnprintf(buf + i, max - i, |
| "Next Hop: %d\n", rt_entry->node_id); |
| } else { |
| i += scnprintf(buf + i, max - i, |
| "XPRT Name: %s\n", |
| rt_entry->xprt_info->xprt->name); |
| i += scnprintf(buf + i, max - i, |
| "Next Hop: 0x%08x\n", |
| rt_entry->xprt_info->remote_node_id); |
| } |
| i += scnprintf(buf + i, max - i, "\n"); |
| up_read(&rt_entry->lock_lha4); |
| } |
| up_read(&routing_table_lock_lha3); |
| } |
| |
| return i; |
| } |
| |
| static int dump_xprt_info(char *buf, int max) |
| { |
| int i = 0; |
| 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) { |
| i += scnprintf(buf + i, max - i, "XPRT Name: %s\n", |
| xprt_info->xprt->name); |
| i += scnprintf(buf + i, max - i, "Link Id: %d\n", |
| xprt_info->xprt->link_id); |
| i += scnprintf(buf + i, max - i, "Initialized: %s\n", |
| (xprt_info->initialized ? "Y" : "N")); |
| i += scnprintf(buf + i, max - i, "Remote Node Id: 0x%08x\n", |
| xprt_info->remote_node_id); |
| i += scnprintf(buf + i, max - i, "\n"); |
| } |
| up_read(&xprt_info_list_lock_lha5); |
| |
| return i; |
| } |
| |
| static int dump_servers(char *buf, int max) |
| { |
| int i = 0, j; |
| struct msm_ipc_server *server; |
| struct msm_ipc_server_port *server_port; |
| |
| 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) { |
| i += scnprintf(buf + i, max - i, "Service: " |
| "0x%08x\n", server->name.service); |
| i += scnprintf(buf + i, max - i, "Instance: " |
| "0x%08x\n", server->name.instance); |
| i += scnprintf(buf + i, max - i, |
| "Node_id: 0x%08x\n", |
| server_port->server_addr.node_id); |
| i += scnprintf(buf + i, max - i, |
| "Port_id: 0x%08x\n", |
| server_port->server_addr.port_id); |
| i += scnprintf(buf + i, max - i, "\n"); |
| } |
| } |
| } |
| up_read(&server_list_lock_lha2); |
| |
| return i; |
| } |
| |
| static int dump_remote_ports(char *buf, int max) |
| { |
| int i = 0, j, k; |
| struct msm_ipc_router_remote_port *rport_ptr; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| 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) { |
| i += scnprintf(buf + i, max - i, |
| "Node_id: 0x%08x\n", |
| rport_ptr->node_id); |
| i += scnprintf(buf + i, max - i, |
| "Port_id: 0x%08x\n", |
| rport_ptr->port_id); |
| i += scnprintf(buf + i, max - i, |
| "Quota_cnt: %d\n", |
| rport_ptr->tx_quota_cnt); |
| i += scnprintf(buf + i, max - i, "\n"); |
| } |
| } |
| up_read(&rt_entry->lock_lha4); |
| } |
| up_read(&routing_table_lock_lha3); |
| } |
| |
| return i; |
| } |
| |
| static int dump_control_ports(char *buf, int max) |
| { |
| int i = 0; |
| struct msm_ipc_port *port_ptr; |
| |
| down_read(&control_ports_lock_lha5); |
| list_for_each_entry(port_ptr, &control_ports, list) { |
| i += scnprintf(buf + i, max - i, "Node_id: 0x%08x\n", |
| port_ptr->this_port.node_id); |
| i += scnprintf(buf + i, max - i, "Port_id: 0x%08x\n", |
| port_ptr->this_port.port_id); |
| i += scnprintf(buf + i, max - i, "\n"); |
| } |
| up_read(&control_ports_lock_lha5); |
| |
| return i; |
| } |
| |
| static int dump_local_ports(char *buf, int max) |
| { |
| int i = 0, j; |
| unsigned long flags; |
| struct msm_ipc_port *port_ptr; |
| |
| down_read(&local_ports_lock_lha2); |
| for (j = 0; j < LP_HASH_SIZE; j++) { |
| list_for_each_entry(port_ptr, &local_ports[j], list) { |
| spin_lock_irqsave(&port_ptr->port_lock, flags); |
| i += scnprintf(buf + i, max - i, "Node_id: 0x%08x\n", |
| port_ptr->this_port.node_id); |
| i += scnprintf(buf + i, max - i, "Port_id: 0x%08x\n", |
| port_ptr->this_port.port_id); |
| i += scnprintf(buf + i, max - i, "# pkts tx'd %d\n", |
| port_ptr->num_tx); |
| i += scnprintf(buf + i, max - i, "# pkts rx'd %d\n", |
| port_ptr->num_rx); |
| i += scnprintf(buf + i, max - i, "# bytes tx'd %ld\n", |
| port_ptr->num_tx_bytes); |
| i += scnprintf(buf + i, max - i, "# bytes rx'd %ld\n", |
| port_ptr->num_rx_bytes); |
| spin_unlock_irqrestore(&port_ptr->port_lock, flags); |
| i += scnprintf(buf + i, max - i, "\n"); |
| } |
| } |
| up_read(&local_ports_lock_lha2); |
| |
| return i; |
| } |
| |
| #define DEBUG_BUFMAX 4096 |
| static char debug_buffer[DEBUG_BUFMAX]; |
| |
| static ssize_t debug_read(struct file *file, char __user *buf, |
| size_t count, loff_t *ppos) |
| { |
| int (*fill)(char *buf, int max) = file->private_data; |
| int bsize = fill(debug_buffer, DEBUG_BUFMAX); |
| return simple_read_from_buffer(buf, count, ppos, debug_buffer, bsize); |
| } |
| |
| static int debug_open(struct inode *inode, struct file *file) |
| { |
| file->private_data = inode->i_private; |
| return 0; |
| } |
| |
| static const struct file_operations debug_ops = { |
| .read = debug_read, |
| .open = debug_open, |
| }; |
| |
| static void debug_create(const char *name, mode_t mode, |
| struct dentry *dent, |
| int (*fill)(char *buf, int max)) |
| { |
| debugfs_create_file(name, mode, dent, fill, &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", 0444, dent, |
| dump_local_ports); |
| debug_create("dump_remote_ports", 0444, dent, |
| dump_remote_ports); |
| debug_create("dump_control_ports", 0444, dent, |
| dump_control_ports); |
| debug_create("dump_servers", 0444, dent, |
| dump_servers); |
| debug_create("dump_xprt_info", 0444, dent, |
| dump_xprt_info); |
| debug_create("dump_routing_table", 0444, dent, |
| dump_routing_table); |
| } |
| |
| #else |
| static void debugfs_init(void) {} |
| #endif |
| |
| static int msm_ipc_router_add_xprt(struct msm_ipc_router_xprt *xprt) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| xprt_info = kmalloc(sizeof(struct msm_ipc_router_xprt_info), |
| GFP_KERNEL); |
| if (!xprt_info) |
| return -ENOMEM; |
| |
| xprt_info->xprt = xprt; |
| xprt_info->initialized = 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); |
| wake_lock_init(&xprt_info->wakelock, |
| WAKE_LOCK_SUSPEND, xprt->name); |
| xprt_info->need_len = 0; |
| xprt_info->abort_data_read = 0; |
| INIT_WORK(&xprt_info->read_data, do_read_data); |
| INIT_LIST_HEAD(&xprt_info->list); |
| |
| xprt_info->workqueue = create_singlethread_workqueue(xprt->name); |
| if (!xprt_info->workqueue) { |
| kfree(xprt_info); |
| return -ENOMEM; |
| } |
| |
| if (!strcmp(xprt->name, "msm_ipc_router_loopback_xprt")) { |
| xprt_info->remote_node_id = IPC_ROUTER_NID_LOCAL; |
| xprt_info->initialized = 1; |
| } |
| |
| 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(); |
| rt_entry = alloc_routing_table_entry(IPC_ROUTER_NID_LOCAL); |
| add_routing_table_entry(rt_entry); |
| routing_table_inited = 1; |
| } |
| up_write(&routing_table_lock_lha3); |
| |
| xprt->priv = 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; |
| |
| if (xprt && xprt->priv) { |
| xprt_info = xprt->priv; |
| |
| mutex_lock(&xprt_info->rx_lock_lhb2); |
| xprt_info->abort_data_read = 1; |
| 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); |
| |
| flush_workqueue(xprt_info->workqueue); |
| destroy_workqueue(xprt_info->workqueue); |
| wake_lock_destroy(&xprt_info->wakelock); |
| |
| 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_cleanup_routing_table(xprt_work->xprt->priv); |
| 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 event, |
| void *data) |
| { |
| struct msm_ipc_router_xprt_info *xprt_info = xprt->priv; |
| struct msm_ipc_router_xprt_work *xprt_work; |
| struct rr_packet *pkt; |
| unsigned long ret; |
| |
| if (!msm_ipc_router_workqueue) { |
| ret = wait_for_completion_timeout(&msm_ipc_local_router_up, |
| IPC_ROUTER_INIT_TIMEOUT); |
| if (!ret || !msm_ipc_router_workqueue) { |
| pr_err("%s: IPC Router not initialized\n", __func__); |
| return; |
| } |
| } |
| |
| switch (event) { |
| case IPC_ROUTER_XPRT_EVENT_OPEN: |
| D("open event for '%s'\n", xprt->name); |
| xprt_work = kmalloc(sizeof(struct msm_ipc_router_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 { |
| pr_err("%s: malloc failure - Couldn't notify OPEN event", |
| __func__); |
| } |
| break; |
| |
| case IPC_ROUTER_XPRT_EVENT_CLOSE: |
| D("close event for '%s'\n", xprt->name); |
| xprt_work = kmalloc(sizeof(struct msm_ipc_router_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 { |
| pr_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; |
| |
| mutex_lock(&xprt_info->rx_lock_lhb2); |
| list_add_tail(&pkt->list, &xprt_info->pkt_list); |
| wake_lock(&xprt_info->wakelock); |
| mutex_unlock(&xprt_info->rx_lock_lhb2); |
| queue_work(xprt_info->workqueue, &xprt_info->read_data); |
| } |
| |
| static int __init msm_ipc_router_init(void) |
| { |
| int i, ret; |
| struct msm_ipc_routing_table_entry *rt_entry; |
| |
| msm_ipc_router_debug_mask |= SMEM_LOG; |
| ipc_rtr_log_ctxt = ipc_log_context_create(IPC_RTR_LOG_PAGES, |
| "ipc_router"); |
| if (!ipc_rtr_log_ctxt) |
| pr_err("%s: Unable to create IPC logging for IPC RTR", |
| __func__); |
| |
| msm_ipc_router_workqueue = |
| create_singlethread_workqueue("msm_ipc_router"); |
| if (!msm_ipc_router_workqueue) |
| return -ENOMEM; |
| |
| 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(); |
| rt_entry = alloc_routing_table_entry(IPC_ROUTER_NID_LOCAL); |
| add_routing_table_entry(rt_entry); |
| routing_table_inited = 1; |
| } |
| up_write(&routing_table_lock_lha3); |
| |
| ret = msm_ipc_router_init_sockets(); |
| if (ret < 0) |
| pr_err("%s: Init sockets failed\n", __func__); |
| |
| ret = msm_ipc_router_security_init(); |
| if (ret < 0) |
| pr_err("%s: Security Init failed\n", __func__); |
| |
| complete_all(&msm_ipc_local_router_up); |
| return ret; |
| } |
| |
| module_init(msm_ipc_router_init); |
| MODULE_DESCRIPTION("MSM IPC Router"); |
| MODULE_LICENSE("GPL v2"); |