ref: 6d5847e0467863addbbb1d8e85905dd5e682d145
src/libs/mynewt-nimble/nimble/transport/socket/src/ble_hci_socket.c
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/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ /* * Provides HCI transport over sockets. Either over * TCP sockets, or Linux bluetooth socket. * * E.g. to connect to TCP target, start in another window * socat -x PIPE:/dev/ttyACM1 TCP4-LISTEN:14433,fork,reuseaddr * When building this package, set BLE_SOCK_USE_TCP=1 and * BLE_SOCK_TCP_PORT controls the target port this transport * connects to. * * To use Linux Bluetooth sockets, create an interface: * sudo hciattach -r -n /dev/ttyUSB0 any 57600 * And build this package with BLE_SOCK_USE_LINUX_BLUE=1, * BLE_SOCK_LINUX_DEV=<interface index of the target interface> * */ #include "syscfg/syscfg.h" #include <assert.h> #include <string.h> #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <sys/types.h> #include <sys/uio.h> #include <unistd.h> #include <sys/socket.h> #if MYNEWT_VAL(BLE_SOCK_USE_TCP) #include <sys/errno.h> #include <netinet/in.h> #include <arpa/inet.h> #endif #if MYNEWT_VAL(BLE_SOCK_USE_LINUX_BLUE) #include <sys/errno.h> #define BTPROTO_HCI 1 #define HCI_CHANNEL_RAW 0 #define HCI_CHANNEL_USER 1 #define HCIDEVUP _IOW('H', 201, int) #define HCIDEVDOWN _IOW('H', 202, int) #define HCIDEVRESET _IOW('H', 203, int) #define HCIGETDEVLIST _IOR('H', 210, int) struct sockaddr_hci { sa_family_t hci_family; unsigned short hci_dev; unsigned short hci_channel; }; #elif MYNEWT_VAL(BLE_SOCK_USE_NUTTX) #include <errno.h> #include <netpacket/bluetooth.h> #endif #include <fcntl.h> #include <sys/ioctl.h> #include "sysinit/sysinit.h" #include "os/os.h" #include "mem/mem.h" #include "stats/stats.h" /* BLE */ #include "nimble/ble.h" #include "nimble/nimble_opt.h" #include "nimble/hci_common.h" #include "nimble/nimble_npl.h" #include "nimble/ble_hci_trans.h" #include "socket/ble_hci_socket.h" /*** * NOTES: * The UART HCI transport doesn't use event buffer priorities. All incoming * and outgoing events use buffers from the same pool. * * The "skip" definitions are here so that when buffers cannot be allocated, * the command or acl packets are simply skipped so that the HCI interface * does not lose synchronization and resets dont (necessarily) occur. */ STATS_SECT_START(hci_sock_stats) STATS_SECT_ENTRY(imsg) STATS_SECT_ENTRY(icmd) STATS_SECT_ENTRY(ievt) STATS_SECT_ENTRY(iacl) STATS_SECT_ENTRY(ibytes) STATS_SECT_ENTRY(ierr) STATS_SECT_ENTRY(imem) STATS_SECT_ENTRY(omsg) STATS_SECT_ENTRY(oacl) STATS_SECT_ENTRY(ocmd) STATS_SECT_ENTRY(oevt) STATS_SECT_ENTRY(obytes) STATS_SECT_ENTRY(oerr) STATS_SECT_END STATS_SECT_DECL(hci_sock_stats) hci_sock_stats; STATS_NAME_START(hci_sock_stats) STATS_NAME(hci_sock_stats, imsg) STATS_NAME(hci_sock_stats, icmd) STATS_NAME(hci_sock_stats, ievt) STATS_NAME(hci_sock_stats, iacl) STATS_NAME(hci_sock_stats, ibytes) STATS_NAME(hci_sock_stats, ierr) STATS_NAME(hci_sock_stats, imem) STATS_NAME(hci_sock_stats, omsg) STATS_NAME(hci_sock_stats, oacl) STATS_NAME(hci_sock_stats, ocmd) STATS_NAME(hci_sock_stats, oevt) STATS_NAME(hci_sock_stats, obytes) STATS_NAME(hci_sock_stats, oerr) STATS_NAME_END(hci_sock_stats) /*** * NOTES: * The "skip" definitions are here so that when buffers cannot be allocated, * the command or acl packets are simply skipped so that the HCI interface * does not lose synchronization and resets dont (necessarily) occur. */ #define BLE_HCI_UART_H4_NONE 0x00 #define BLE_HCI_UART_H4_CMD 0x01 #define BLE_HCI_UART_H4_ACL 0x02 #define BLE_HCI_UART_H4_SCO 0x03 #define BLE_HCI_UART_H4_EVT 0x04 #define BLE_HCI_UART_H4_SYNC_LOSS 0x80 #define BLE_HCI_UART_H4_SKIP_CMD 0x81 #define BLE_HCI_UART_H4_SKIP_ACL 0x82 #if MYNEWT #define BLE_SOCK_STACK_SIZE \ OS_STACK_ALIGN(MYNEWT_VAL(BLE_SOCK_STACK_SIZE)) struct os_task ble_sock_task; #endif static struct os_mempool ble_hci_sock_evt_hi_pool; static os_membuf_t ble_hci_sock_evt_hi_buf[ OS_MEMPOOL_SIZE(MYNEWT_VAL(BLE_HCI_EVT_HI_BUF_COUNT), MYNEWT_VAL(BLE_HCI_EVT_BUF_SIZE)) ]; static struct os_mempool ble_hci_sock_evt_lo_pool; static os_membuf_t ble_hci_sock_evt_lo_buf[ OS_MEMPOOL_SIZE(MYNEWT_VAL(BLE_HCI_EVT_LO_BUF_COUNT), MYNEWT_VAL(BLE_HCI_EVT_BUF_SIZE)) ]; static struct os_mempool ble_hci_sock_cmd_pool; static os_membuf_t ble_hci_sock_cmd_buf[ OS_MEMPOOL_SIZE(1, BLE_HCI_TRANS_CMD_SZ) ]; static struct os_mempool ble_hci_sock_acl_pool; static struct os_mbuf_pool ble_hci_sock_acl_mbuf_pool; #define ACL_BLOCK_SIZE OS_ALIGN(MYNEWT_VAL(BLE_ACL_BUF_SIZE) \ + BLE_MBUF_MEMBLOCK_OVERHEAD \ + BLE_HCI_DATA_HDR_SZ, OS_ALIGNMENT) /* * The MBUF payload size must accommodate the HCI data header size plus the * maximum ACL data packet length. The ACL block size is the size of the * mbufs we will allocate. */ static os_membuf_t ble_hci_sock_acl_buf[ OS_MEMPOOL_SIZE(MYNEWT_VAL(BLE_ACL_BUF_COUNT), ACL_BLOCK_SIZE) ]; static ble_hci_trans_rx_cmd_fn *ble_hci_sock_rx_cmd_cb; static void *ble_hci_sock_rx_cmd_arg; static ble_hci_trans_rx_acl_fn *ble_hci_sock_rx_acl_cb; static void *ble_hci_sock_rx_acl_arg; static struct ble_hci_sock_state { int sock; struct ble_npl_eventq evq; struct ble_npl_event ev; struct ble_npl_callout timer; uint16_t rx_off; uint8_t rx_data[512]; } ble_hci_sock_state; #if MYNEWT_VAL(BLE_SOCK_USE_TCP) static int s_ble_hci_device = MYNEWT_VAL(BLE_SOCK_TCP_PORT); #elif MYNEWT_VAL(BLE_SOCK_USE_LINUX_BLUE) static int s_ble_hci_device = MYNEWT_VAL(BLE_SOCK_LINUX_DEV); #elif MYNEWT_VAL(BLE_SOCK_USE_NUTTX) static int s_ble_hci_device = 0; #endif /** * Allocates a buffer (mbuf) for ACL operation. * * @return The allocated buffer on success; * NULL on buffer exhaustion. */ static struct os_mbuf * ble_hci_trans_acl_buf_alloc(void) { struct os_mbuf *m; /* * XXX: note that for host only there would be no need to allocate * a user header. Address this later. */ m = os_mbuf_get_pkthdr(&ble_hci_sock_acl_mbuf_pool, sizeof(struct ble_mbuf_hdr)); return m; } #if MYNEWT_VAL(BLE_SOCK_USE_LINUX_BLUE) static int ble_hci_sock_acl_tx(struct os_mbuf *om) { struct msghdr msg; struct iovec iov[8]; int i; struct os_mbuf *m; uint8_t ch; memset(&msg, 0, sizeof(msg)); memset(iov, 0, sizeof(iov)); msg.msg_iov = iov; ch = BLE_HCI_UART_H4_ACL; iov[0].iov_len = 1; iov[0].iov_base = &ch; i = 1; for (m = om; m; m = SLIST_NEXT(m, om_next)) { iov[i].iov_base = m->om_data; iov[i].iov_len = m->om_len; i++; } msg.msg_iovlen = i; STATS_INC(hci_sock_stats, omsg); STATS_INC(hci_sock_stats, oacl); STATS_INCN(hci_sock_stats, obytes, OS_MBUF_PKTLEN(om) + 1); i = sendmsg(ble_hci_sock_state.sock, &msg, 0); os_mbuf_free_chain(om); if (i != OS_MBUF_PKTLEN(om) + 1) { if (i < 0) { dprintf(1, "sendmsg() failed : %d\n", errno); } else { dprintf(1, "sendmsg() partial write: %d\n", i); } STATS_INC(hci_sock_stats, oerr); return BLE_ERR_MEM_CAPACITY; } return 0; } #elif MYNEWT_VAL(BLE_SOCK_USE_NUTTX) static int ble_hci_sock_acl_tx(struct os_mbuf *om) { size_t len; uint8_t *buf; int i; struct os_mbuf *m; struct sockaddr_hci addr; addr.hci_family = AF_BLUETOOTH; addr.hci_channel = HCI_CHANNEL_RAW; addr.hci_dev = 0; memcpy(&addr, &addr, sizeof(struct sockaddr_hci)); len = 1; for (m = om; m; m = SLIST_NEXT(m, om_next)) { len += m->om_len; } buf = (uint8_t *)malloc(len); buf[0] = BLE_HCI_UART_H4_ACL; i = 1; for (m = om; m; m = SLIST_NEXT(m, om_next)) { memcpy(&buf[i], m->om_data, m->om_len); i += m->om_len; } STATS_INC(hci_sock_stats, omsg); STATS_INC(hci_sock_stats, oacl); STATS_INCN(hci_sock_stats, obytes, OS_MBUF_PKTLEN(om) + 1); i = sendto(ble_hci_sock_state.sock, buf, len, 0, (struct sockaddr *)&addr, sizeof(struct sockaddr_hci)); free(buf); os_mbuf_free_chain(om); if (i != OS_MBUF_PKTLEN(om) + 1) { if (i < 0) { dprintf(1, "sendto() failed : %d\n", errno); } else { dprintf(1, "sendto() partial write: %d\n", i); } STATS_INC(hci_sock_stats, oerr); return BLE_ERR_MEM_CAPACITY; } return 0; } #endif #if MYNEWT_VAL(BLE_SOCK_USE_LINUX_BLUE) static int ble_hci_sock_cmdevt_tx(uint8_t *hci_ev, uint8_t h4_type) { uint8_t btaddr[6]; struct msghdr msg; struct iovec iov[8]; int len; int i; uint8_t ch; memset(&msg, 0, sizeof(msg)); memset(iov, 0, sizeof(iov)); msg.msg_iov = iov; msg.msg_iovlen = 2; ch = h4_type; iov[0].iov_len = 1; iov[0].iov_base = &ch; iov[1].iov_base = hci_ev; if (h4_type == BLE_HCI_UART_H4_CMD) { len = sizeof(struct ble_hci_cmd) + hci_ev[2]; STATS_INC(hci_sock_stats, ocmd); } else if (h4_type == BLE_HCI_UART_H4_EVT) { len = sizeof(struct ble_hci_ev) + hci_ev[1]; STATS_INC(hci_sock_stats, oevt); } else { assert(0); } iov[1].iov_len = len; STATS_INC(hci_sock_stats, omsg); STATS_INCN(hci_sock_stats, obytes, len + 1); i = sendmsg(ble_hci_sock_state.sock, &msg, 0); ble_hci_trans_buf_free(hci_ev); if (i != len + 1) { if (i < 0) { dprintf(1, "sendmsg() failed : %d\n", errno); } else { dprintf(1, "sendmsg() partial write: %d\n", i); } STATS_INC(hci_sock_stats, oerr); return BLE_ERR_MEM_CAPACITY; } return 0; } #elif MYNEWT_VAL(BLE_SOCK_USE_NUTTX) static int ble_hci_sock_cmdevt_tx(uint8_t *hci_ev, uint8_t h4_type) { uint8_t *buf; size_t len; struct sockaddr_hci addr; int i; addr.hci_family = AF_BLUETOOTH; addr.hci_channel = HCI_CHANNEL_RAW; addr.hci_dev = 0; memcpy(&addr, &addr, sizeof(struct sockaddr_hci)); if (h4_type == BLE_HCI_UART_H4_CMD) { len = sizeof(struct ble_hci_cmd) + hci_ev[2]; STATS_INC(hci_sock_stats, ocmd); } else if (h4_type == BLE_HCI_UART_H4_EVT) { len = sizeof(struct ble_hci_ev) + hci_ev[1]; STATS_INC(hci_sock_stats, oevt); } else { assert(0); } STATS_INC(hci_sock_stats, omsg); STATS_INCN(hci_sock_stats, obytes, len + 1); buf = (uint8_t *)malloc(len + 1); buf[0] = h4_type; memcpy(&buf[1], hci_ev, len); i = sendto(ble_hci_sock_state.sock, buf, len + 1, 0, (struct sockaddr *)&addr, sizeof(struct sockaddr_hci)); free(buf); ble_hci_trans_buf_free(hci_ev); if (i != len + 1) { if (i < 0) { dprintf(1, "sendto() failed : %d\n", errno); } else { dprintf(1, "sendto() partial write: %d\n", i); } STATS_INC(hci_sock_stats, oerr); return BLE_ERR_MEM_CAPACITY; } return 0; } #endif static int ble_hci_sock_rx_msg(void) { struct ble_hci_sock_state *bhss; int len; struct os_mbuf *m; uint8_t *data; int sr; int rc; bhss = &ble_hci_sock_state; if (bhss->sock < 0) { return -1; } len = read(bhss->sock, bhss->rx_data + bhss->rx_off, sizeof(bhss->rx_data) - bhss->rx_off); if (len < 0) { return -2; } if (len == 0) { return -1; } bhss->rx_off += len; STATS_INCN(hci_sock_stats, ibytes, len); while (bhss->rx_off > 0) { switch (bhss->rx_data[0]) { #if MYNEWT_VAL(BLE_CONTROLLER) case BLE_HCI_UART_H4_CMD: if (bhss->rx_off < sizeof(struct ble_hci_cmd)) { return -1; } len = 1 + sizeof(struct ble_hci_cmd) + bhss->rx_data[3]; if (bhss->rx_off < len) { return -1; } STATS_INC(hci_sock_stats, imsg); STATS_INC(hci_sock_stats, icmd); data = ble_hci_trans_buf_alloc(BLE_HCI_TRANS_BUF_CMD); if (!data) { STATS_INC(hci_sock_stats, ierr); break; } memcpy(data, &bhss->rx_data[1], len - 1); OS_ENTER_CRITICAL(sr); rc = ble_hci_sock_rx_cmd_cb(data, ble_hci_sock_rx_cmd_arg); OS_EXIT_CRITICAL(sr); if (rc) { ble_hci_trans_buf_free(data); STATS_INC(hci_sock_stats, ierr); break; } break; #endif #if MYNEWT_VAL(BLE_HOST) case BLE_HCI_UART_H4_EVT: if (bhss->rx_off < sizeof(struct ble_hci_ev)) { return -1; } len = 1 + sizeof(struct ble_hci_ev) + bhss->rx_data[2]; if (bhss->rx_off < len) { return -1; } STATS_INC(hci_sock_stats, imsg); STATS_INC(hci_sock_stats, ievt); data = ble_hci_trans_buf_alloc(BLE_HCI_TRANS_BUF_EVT_HI); if (!data) { STATS_INC(hci_sock_stats, ierr); break; } memcpy(data, &bhss->rx_data[1], len - 1); OS_ENTER_CRITICAL(sr); rc = ble_hci_sock_rx_cmd_cb(data, ble_hci_sock_rx_cmd_arg); OS_EXIT_CRITICAL(sr); if (rc) { ble_hci_trans_buf_free(data); STATS_INC(hci_sock_stats, ierr); return 0; } break; #endif case BLE_HCI_UART_H4_ACL: if (bhss->rx_off < BLE_HCI_DATA_HDR_SZ) { return -1; } len = 1 + BLE_HCI_DATA_HDR_SZ + (bhss->rx_data[4] << 8) + bhss->rx_data[3]; if (bhss->rx_off < len) { return -1; } STATS_INC(hci_sock_stats, imsg); STATS_INC(hci_sock_stats, iacl); m = ble_hci_trans_acl_buf_alloc(); if (!m) { STATS_INC(hci_sock_stats, imem); break; } if (os_mbuf_append(m, &bhss->rx_data[1], len - 1)) { STATS_INC(hci_sock_stats, imem); os_mbuf_free_chain(m); break; } OS_ENTER_CRITICAL(sr); ble_hci_sock_rx_acl_cb(m, ble_hci_sock_rx_acl_arg); OS_EXIT_CRITICAL(sr); break; default: STATS_INC(hci_sock_stats, ierr); break; } memmove(bhss->rx_data, &bhss->rx_data[len], bhss->rx_off - len); bhss->rx_off -= len; } return 0; } static void ble_hci_sock_rx_ev(struct ble_npl_event *ev) { int rc; ble_npl_time_t timeout; rc = ble_hci_sock_rx_msg(); if (rc == 0) { ble_npl_eventq_put(&ble_hci_sock_state.evq, &ble_hci_sock_state.ev); } else { rc = ble_npl_time_ms_to_ticks(10, &timeout); ble_npl_callout_reset(&ble_hci_sock_state.timer, timeout); } } #if MYNEWT_VAL(BLE_SOCK_USE_TCP) static int ble_hci_sock_config(void) { struct ble_hci_sock_state *bhss = &ble_hci_sock_state; struct sockaddr_in sin; ble_npl_time_t timeout; int s; int rc; memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = htons(s_ble_hci_device); sin.sin_addr.s_addr = inet_addr("127.0.0.1"); #ifdef MN_OSX sin.sin_len = sizeof(sin); #endif #if 0 if (bhss->sock >= 0) { close(bhss->sock); bhss->sock = -1; } #endif if (bhss->sock < 0) { s = socket(PF_INET, SOCK_STREAM, 0); if (s < 0) { goto err; } rc = connect(s, (struct sockaddr *)&sin, sizeof(sin)); if (rc) { dprintf(1, "connect() failed: %d\n", errno); goto err; } rc = 1; rc = ioctl(s, FIONBIO, (char *)&rc); if (rc) { goto err; } bhss->sock = s; } rc = ble_npl_time_ms_to_ticks(10, &timeout); if (rc) { goto err; } ble_npl_callout_reset(&ble_hci_sock_state.timer, timeout); return 0; err: if (s >= 0) { close(s); } return BLE_ERR_HW_FAIL; } #endif #if MYNEWT_VAL(BLE_SOCK_USE_LINUX_BLUE) static int ble_hci_sock_config(void) { struct sockaddr_hci shci; int s; int rc; ble_npl_time_t timeout; memset(&shci, 0, sizeof(shci)); shci.hci_family = AF_BLUETOOTH; shci.hci_dev = s_ble_hci_device; shci.hci_channel = HCI_CHANNEL_USER; if (ble_hci_sock_state.sock >= 0) { close(ble_hci_sock_state.sock); ble_hci_sock_state.sock = -1; } s = socket(PF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI); if (s < 0) { dprintf(1, "socket() failed %d\n", errno); goto err; } /* * HCI User Channel requires exclusive access to the device. * The device has to be down at the time of binding. */ ioctl(s, HCIDEVDOWN, shci.hci_dev); rc = bind(s, (struct sockaddr *)&shci, sizeof(shci)); if (rc) { dprintf(1, "bind() failed %d hci%d\n", errno, shci.hci_dev); goto err; } rc = 1; rc = ioctl(s, FIONBIO, (char *)&rc); if (rc) { goto err; } ble_hci_sock_state.sock = s; rc = ble_npl_time_ms_to_ticks(10, &timeout); if (rc) { goto err; } ble_npl_callout_reset(&ble_hci_sock_state.timer, timeout); return 0; err: if (s >= 0) { close(s); } return BLE_ERR_HW_FAIL; } #elif MYNEWT_VAL(BLE_SOCK_USE_NUTTX) static int ble_hci_sock_config(void) { struct sockaddr_hci shci; int s; int rc; ble_npl_time_t timeout; memset(&shci, 0, sizeof(shci)); shci.hci_family = AF_BLUETOOTH; shci.hci_dev = 0; shci.hci_channel = HCI_CHANNEL_RAW; if (ble_hci_sock_state.sock >= 0) { close(ble_hci_sock_state.sock); ble_hci_sock_state.sock = -1; } s = socket(PF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI); if (s < 0) { dprintf(1, "socket() failed %d\n", errno); goto err; } rc = bind(s, (struct sockaddr *)&shci, sizeof(shci)); if (rc) { dprintf(1, "bind() failed %d hci%d\n", errno, shci.hci_dev); goto err; } ble_hci_sock_state.sock = s; rc = ble_npl_time_ms_to_ticks(10, &timeout); if (rc) { goto err; } ble_npl_callout_reset(&ble_hci_sock_state.timer, timeout); return 0; err: if (s >= 0) { close(s); } return BLE_ERR_HW_FAIL; } #endif /** * Sends an HCI event from the controller to the host. * * @param cmd The HCI event to send. This buffer must be * allocated via ble_hci_trans_buf_alloc(). * * @return 0 on success; * A BLE_ERR_[...] error code on failure. */ int ble_hci_trans_ll_evt_tx(uint8_t *cmd) { return ble_hci_sock_cmdevt_tx(cmd, BLE_HCI_UART_H4_EVT); } /** * Sends ACL data from controller to host. * * @param om The ACL data packet to send. * * @return 0 on success; * A BLE_ERR_[...] error code on failure. */ int ble_hci_trans_ll_acl_tx(struct os_mbuf *om) { return ble_hci_sock_acl_tx(om); } /** * Sends an HCI command from the host to the controller. * * @param cmd The HCI command to send. This buffer must be * allocated via ble_hci_trans_buf_alloc(). * * @return 0 on success; * A BLE_ERR_[...] error code on failure. */ int ble_hci_trans_hs_cmd_tx(uint8_t *cmd) { return ble_hci_sock_cmdevt_tx(cmd, BLE_HCI_UART_H4_CMD); } /** * Sends ACL data from host to controller. * * @param om The ACL data packet to send. * * @return 0 on success; * A BLE_ERR_[...] error code on failure. */ int ble_hci_trans_hs_acl_tx(struct os_mbuf *om) { return ble_hci_sock_acl_tx(om); } /** * Configures the HCI transport to call the specified callback upon receiving * HCI packets from the controller. This function should only be called by by * host. * * @param cmd_cb The callback to execute upon receiving an HCI * event. * @param cmd_arg Optional argument to pass to the command * callback. * @param acl_cb The callback to execute upon receiving ACL * data. * @param acl_arg Optional argument to pass to the ACL * callback. */ void ble_hci_trans_cfg_hs(ble_hci_trans_rx_cmd_fn *cmd_cb, void *cmd_arg, ble_hci_trans_rx_acl_fn *acl_cb, void *acl_arg) { ble_hci_sock_rx_cmd_cb = cmd_cb; ble_hci_sock_rx_cmd_arg = cmd_arg; ble_hci_sock_rx_acl_cb = acl_cb; ble_hci_sock_rx_acl_arg = acl_arg; } /** * Configures the HCI transport to operate with a host. The transport will * execute specified callbacks upon receiving HCI packets from the controller. * * @param cmd_cb The callback to execute upon receiving an HCI * event. * @param cmd_arg Optional argument to pass to the command * callback. * @param acl_cb The callback to execute upon receiving ACL * data. * @param acl_arg Optional argument to pass to the ACL * callback. */ void ble_hci_trans_cfg_ll(ble_hci_trans_rx_cmd_fn *cmd_cb, void *cmd_arg, ble_hci_trans_rx_acl_fn *acl_cb, void *acl_arg) { ble_hci_sock_rx_cmd_cb = cmd_cb; ble_hci_sock_rx_cmd_arg = cmd_arg; ble_hci_sock_rx_acl_cb = acl_cb; ble_hci_sock_rx_acl_arg = acl_arg; } /** * Allocates a flat buffer of the specified type. * * @param type The type of buffer to allocate; one of the * BLE_HCI_TRANS_BUF_[...] constants. * * @return The allocated buffer on success; * NULL on buffer exhaustion. */ uint8_t * ble_hci_trans_buf_alloc(int type) { uint8_t *buf; switch (type) { case BLE_HCI_TRANS_BUF_CMD: buf = os_memblock_get(&ble_hci_sock_cmd_pool); break; case BLE_HCI_TRANS_BUF_EVT_HI: buf = os_memblock_get(&ble_hci_sock_evt_hi_pool); if (buf == NULL) { /* If no high-priority event buffers remain, try to grab a * low-priority one. */ buf = os_memblock_get(&ble_hci_sock_evt_lo_pool); } break; case BLE_HCI_TRANS_BUF_EVT_LO: buf = os_memblock_get(&ble_hci_sock_evt_lo_pool); break; default: assert(0); buf = NULL; } return buf; } /** * Frees the specified flat buffer. The buffer must have been allocated via * ble_hci_trans_buf_alloc(). * * @param buf The buffer to free. */ void ble_hci_trans_buf_free(uint8_t *buf) { int rc; /* * XXX: this may look a bit odd, but the controller uses the command * buffer to send back the command complete/status as an immediate * response to the command. This was done to insure that the controller * could always send back one of these events when a command was received. * Thus, we check to see which pool the buffer came from so we can free * it to the appropriate pool */ if (os_memblock_from(&ble_hci_sock_evt_hi_pool, buf)) { rc = os_memblock_put(&ble_hci_sock_evt_hi_pool, buf); assert(rc == 0); } else if (os_memblock_from(&ble_hci_sock_evt_lo_pool, buf)) { rc = os_memblock_put(&ble_hci_sock_evt_lo_pool, buf); assert(rc == 0); } else { assert(os_memblock_from(&ble_hci_sock_cmd_pool, buf)); rc = os_memblock_put(&ble_hci_sock_cmd_pool, buf); assert(rc == 0); } } /** * Resets the HCI UART transport to a clean state. Frees all buffers and * reconfigures the UART. * * @return 0 on success; * A BLE_ERR_[...] error code on failure. */ int ble_hci_trans_reset(void) { int rc; ble_npl_callout_stop(&ble_hci_sock_state.timer); /* Reopen the UART. */ rc = ble_hci_sock_config(); if (rc != 0) { dprintf(1, "Failure restarting socket HCI\n"); return rc; } return 0; } void ble_hci_sock_ack_handler(void *arg) { struct ble_npl_event *ev; while (1) { ev = ble_npl_eventq_get(&ble_hci_sock_state.evq, BLE_NPL_TIME_FOREVER); ble_npl_event_run(ev); } } static void ble_hci_sock_init_task(void) { ble_npl_eventq_init(&ble_hci_sock_state.evq); ble_npl_callout_stop(&ble_hci_sock_state.timer); ble_npl_callout_init(&ble_hci_sock_state.timer, &ble_hci_sock_state.evq, ble_hci_sock_rx_ev, NULL); #if MYNEWT { os_stack_t *pstack; pstack = malloc(sizeof(os_stack_t)*BLE_SOCK_STACK_SIZE); assert(pstack); os_task_init(&ble_sock_task, "hci_sock", ble_hci_sock_ack_handler, NULL, MYNEWT_VAL(BLE_SOCK_TASK_PRIO), BLE_NPL_TIME_FOREVER, pstack, BLE_SOCK_STACK_SIZE); } #else /* * For non-Mynewt OS it is required that OS creates task for HCI SOCKET * to run ble_hci_sock_ack_handler. */ #endif } void ble_hci_sock_set_device(int dev) { s_ble_hci_device = dev; } /** * Initializes the UART HCI transport module. * * @return 0 on success; * A BLE_ERR_[...] error code on failure. */ void ble_hci_sock_init(void) { int rc; /* Ensure this function only gets called by sysinit. */ SYSINIT_ASSERT_ACTIVE(); memset(&ble_hci_sock_state, 0, sizeof(ble_hci_sock_state)); ble_hci_sock_state.sock = -1; ble_hci_sock_init_task(); ble_npl_event_init(&ble_hci_sock_state.ev, ble_hci_sock_rx_ev, NULL); rc = os_mempool_init(&ble_hci_sock_acl_pool, MYNEWT_VAL(BLE_ACL_BUF_COUNT), ACL_BLOCK_SIZE, ble_hci_sock_acl_buf, "ble_hci_sock_acl_pool"); SYSINIT_PANIC_ASSERT(rc == 0); rc = os_mbuf_pool_init(&ble_hci_sock_acl_mbuf_pool, &ble_hci_sock_acl_pool, ACL_BLOCK_SIZE, MYNEWT_VAL(BLE_ACL_BUF_COUNT)); SYSINIT_PANIC_ASSERT(rc == 0); /* * Create memory pool of HCI command buffers. NOTE: we currently dont * allow this to be configured. The controller will only allow one * outstanding command. We decided to keep this a pool in case we allow * allow the controller to handle more than one outstanding command. */ rc = os_mempool_init(&ble_hci_sock_cmd_pool, 1, BLE_HCI_TRANS_CMD_SZ, &ble_hci_sock_cmd_buf, "ble_hci_sock_cmd_pool"); SYSINIT_PANIC_ASSERT(rc == 0); rc = os_mempool_init(&ble_hci_sock_evt_hi_pool, MYNEWT_VAL(BLE_HCI_EVT_HI_BUF_COUNT), MYNEWT_VAL(BLE_HCI_EVT_BUF_SIZE), &ble_hci_sock_evt_hi_buf, "ble_hci_sock_evt_hi_pool"); SYSINIT_PANIC_ASSERT(rc == 0); rc = os_mempool_init(&ble_hci_sock_evt_lo_pool, MYNEWT_VAL(BLE_HCI_EVT_LO_BUF_COUNT), MYNEWT_VAL(BLE_HCI_EVT_BUF_SIZE), ble_hci_sock_evt_lo_buf, "ble_hci_sock_evt_lo_pool"); SYSINIT_PANIC_ASSERT(rc == 0); rc = ble_hci_sock_config(); SYSINIT_PANIC_ASSERT_MSG(rc == 0, "Failure configuring socket HCI"); rc = stats_init_and_reg(STATS_HDR(hci_sock_stats), STATS_SIZE_INIT_PARMS(hci_sock_stats, STATS_SIZE_32), STATS_NAME_INIT_PARMS(hci_sock_stats), "hci_socket"); SYSINIT_PANIC_ASSERT(rc == 0); } |