Yves Godin | 660709d | 2016-05-19 11:08:03 +0200 | [diff] [blame] | 1 | /* Interface handler for Nuran Wireless Litecell 1.5 L1 (real hardware) */ |
| 2 | |
| 3 | /* Copyright (C) 2015 by Yves Godin <support@nuranwireless.com> |
| 4 | * based on: |
| 5 | * femto_l1_hw.c |
| 6 | * (C) 2011 by Harald Welte <laforge@gnumonks.org> |
| 7 | * |
| 8 | * All Rights Reserved |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU Affero General Public License as published by |
| 12 | * the Free Software Foundation; either version 3 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Affero General Public License |
| 21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <assert.h> |
| 26 | #include <stdint.h> |
| 27 | #include <unistd.h> |
| 28 | #include <errno.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <string.h> |
| 31 | #include <limits.h> |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/stat.h> |
| 35 | |
| 36 | #include <osmocom/core/talloc.h> |
| 37 | #include <osmocom/core/utils.h> |
| 38 | #include <osmocom/core/select.h> |
| 39 | #include <osmocom/core/write_queue.h> |
| 40 | #include <osmocom/core/timer.h> |
| 41 | #include <osmocom/gsm/gsm_utils.h> |
| 42 | |
| 43 | #include <nrw/litecell15/litecell15.h> |
| 44 | #include <nrw/litecell15/gsml1prim.h> |
| 45 | #include <nrw/litecell15/gsml1const.h> |
| 46 | #include <nrw/litecell15/gsml1types.h> |
| 47 | |
| 48 | #include "gprs_debug.h" |
| 49 | #include "lc15bts.h" |
| 50 | #include "lc15_l1_if.h" |
| 51 | |
| 52 | #define DEV_SYS_DSP2ARM_NAME "/dev/msgq/litecell15_dsp2arm_trx" |
| 53 | #define DEV_SYS_ARM2DSP_NAME "/dev/msgq/litecell15_arm2dsp_trx" |
| 54 | #define DEV_L1_DSP2ARM_NAME "/dev/msgq/gsml1_sig_dsp2arm_trx" |
| 55 | #define DEV_L1_ARM2DSP_NAME "/dev/msgq/gsml1_sig_arm2dsp_trx" |
| 56 | |
| 57 | #define DEV_TCH_DSP2ARM_NAME "/dev/msgq/gsml1_tch_dsp2arm_trx" |
| 58 | #define DEV_TCH_ARM2DSP_NAME "/dev/msgq/gsml1_tch_arm2dsp_trx" |
| 59 | #define DEV_PDTCH_DSP2ARM_NAME "/dev/msgq/gsml1_pdtch_dsp2arm_trx" |
| 60 | #define DEV_PDTCH_ARM2DSP_NAME "/dev/msgq/gsml1_pdtch_arm2dsp_trx" |
| 61 | |
| 62 | static const char *rd_devnames[] = { |
| 63 | [MQ_SYS_READ] = DEV_SYS_DSP2ARM_NAME, |
| 64 | [MQ_L1_READ] = DEV_L1_DSP2ARM_NAME, |
| 65 | [MQ_TCH_READ] = DEV_TCH_DSP2ARM_NAME, |
| 66 | [MQ_PDTCH_READ] = DEV_PDTCH_DSP2ARM_NAME, |
| 67 | }; |
| 68 | |
| 69 | static const char *wr_devnames[] = { |
| 70 | [MQ_SYS_WRITE] = DEV_SYS_ARM2DSP_NAME, |
| 71 | [MQ_L1_WRITE] = DEV_L1_ARM2DSP_NAME, |
| 72 | [MQ_TCH_WRITE] = DEV_TCH_ARM2DSP_NAME, |
| 73 | [MQ_PDTCH_WRITE]= DEV_PDTCH_ARM2DSP_NAME, |
| 74 | }; |
| 75 | |
| 76 | /* callback when there's something to read from the l1 msg_queue */ |
| 77 | static int l1if_fd_cb(struct osmo_fd *ofd, unsigned int what) |
| 78 | { |
| 79 | //struct msgb *msg = l1p_msgb_alloc(); |
| 80 | struct msgb *msg = msgb_alloc_headroom(sizeof(Litecell15_Prim_t) + 128, |
| 81 | 128, "1l_fd"); |
| 82 | struct lc15l1_hdl *fl1h = ofd->data; |
| 83 | int rc; |
| 84 | |
| 85 | msg->l1h = msg->data; |
| 86 | rc = read(ofd->fd, msg->l1h, msgb_tailroom(msg)); |
| 87 | if (rc < 0) { |
| 88 | if (rc != -1) |
| 89 | LOGP(DL1IF, LOGL_ERROR, "error reading from L1 msg_queue: %s\n", |
| 90 | strerror(errno)); |
| 91 | msgb_free(msg); |
| 92 | return rc; |
| 93 | } |
| 94 | msgb_put(msg, rc); |
| 95 | |
| 96 | switch (ofd->priv_nr) { |
| 97 | case MQ_SYS_WRITE: |
| 98 | if (rc != sizeof(Litecell15_Prim_t)) |
| 99 | LOGP(DL1IF, LOGL_NOTICE, "%u != " |
| 100 | "sizeof(Litecell15_Prim_t)\n", rc); |
| 101 | return l1if_handle_sysprim(fl1h, msg); |
| 102 | case MQ_L1_WRITE: |
| 103 | case MQ_TCH_WRITE: |
| 104 | case MQ_PDTCH_WRITE: |
| 105 | if (rc != sizeof(GsmL1_Prim_t)) |
| 106 | LOGP(DL1IF, LOGL_NOTICE, "%u != " |
| 107 | "sizeof(GsmL1_Prim_t)\n", rc); |
| 108 | return l1if_handle_l1prim(ofd->priv_nr, fl1h, msg); |
| 109 | default: |
| 110 | /* The compiler can't know that priv_nr is an enum. Assist. */ |
| 111 | LOGP(DL1IF, LOGL_FATAL, "writing on a wrong queue: %d\n", |
| 112 | ofd->priv_nr); |
| 113 | exit(0); |
| 114 | break; |
| 115 | } |
| 116 | }; |
| 117 | |
| 118 | /* callback when we can write to one of the l1 msg_queue devices */ |
| 119 | static int l1fd_write_cb(struct osmo_fd *ofd, struct msgb *msg) |
| 120 | { |
| 121 | int rc; |
| 122 | |
| 123 | rc = write(ofd->fd, msg->l1h, msgb_l1len(msg)); |
| 124 | if (rc < 0) { |
| 125 | LOGP(DL1IF, LOGL_ERROR, "error writing to L1 msg_queue: %s\n", |
| 126 | strerror(errno)); |
| 127 | return rc; |
| 128 | } else if (rc < msg->len) { |
| 129 | LOGP(DL1IF, LOGL_ERROR, "short write to L1 msg_queue: " |
| 130 | "%u < %u\n", rc, msg->len); |
| 131 | return -EIO; |
| 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | int l1if_transport_open(int q, struct lc15l1_hdl *hdl) |
| 138 | { |
| 139 | int rc; |
| 140 | char buf[PATH_MAX]; |
| 141 | |
| 142 | /* Step 1: Open all msg_queue file descriptors */ |
| 143 | struct osmo_fd *read_ofd = &hdl->read_ofd[q]; |
| 144 | struct osmo_wqueue *wq = &hdl->write_q[q]; |
| 145 | struct osmo_fd *write_ofd = &hdl->write_q[q].bfd; |
| 146 | |
| 147 | snprintf(buf, sizeof(buf)-1, "%s%d", rd_devnames[q], hdl->hw_info.trx_nr); |
| 148 | buf[sizeof(buf)-1] = '\0'; |
| 149 | |
| 150 | rc = open(buf, O_RDONLY); |
| 151 | if (rc < 0) { |
| 152 | LOGP(DL1IF, LOGL_FATAL, "unable to open msg_queue %s: %s\n", |
| 153 | buf, strerror(errno)); |
| 154 | return rc; |
| 155 | } |
Harald Welte | 8347359 | 2020-10-19 12:56:30 +0200 | [diff] [blame] | 156 | osmo_fd_setup(read_ofd, rc, OSMO_FD_READ, l1if_fd_cb, hdl, q); |
Yves Godin | 660709d | 2016-05-19 11:08:03 +0200 | [diff] [blame] | 157 | rc = osmo_fd_register(read_ofd); |
| 158 | if (rc < 0) { |
| 159 | close(read_ofd->fd); |
| 160 | read_ofd->fd = -1; |
| 161 | return rc; |
| 162 | } |
| 163 | |
| 164 | snprintf(buf, sizeof(buf)-1, "%s%d", wr_devnames[q], hdl->hw_info.trx_nr); |
| 165 | buf[sizeof(buf)-1] = '\0'; |
| 166 | |
| 167 | rc = open(buf, O_WRONLY); |
| 168 | if (rc < 0) { |
| 169 | LOGP(DL1IF, LOGL_FATAL, "unable to open msg_queue %s: %s\n", |
| 170 | buf, strerror(errno)); |
| 171 | goto out_read; |
| 172 | } |
| 173 | osmo_wqueue_init(wq, 10); |
| 174 | wq->write_cb = l1fd_write_cb; |
Harald Welte | 8347359 | 2020-10-19 12:56:30 +0200 | [diff] [blame] | 175 | osmo_fd_setup(write_ofd, rc, OSMO_FD_WRITE, osmo_wqueue_bfd_cb, hdl, q); |
Yves Godin | 660709d | 2016-05-19 11:08:03 +0200 | [diff] [blame] | 176 | rc = osmo_fd_register(write_ofd); |
| 177 | if (rc < 0) { |
| 178 | close(write_ofd->fd); |
| 179 | write_ofd->fd = -1; |
| 180 | goto out_read; |
| 181 | } |
| 182 | |
| 183 | return 0; |
| 184 | |
| 185 | out_read: |
| 186 | close(hdl->read_ofd[q].fd); |
| 187 | osmo_fd_unregister(&hdl->read_ofd[q]); |
| 188 | |
| 189 | return rc; |
| 190 | } |
| 191 | |
| 192 | int l1if_transport_close(int q, struct lc15l1_hdl *hdl) |
| 193 | { |
| 194 | struct osmo_fd *read_ofd = &hdl->read_ofd[q]; |
| 195 | struct osmo_fd *write_ofd = &hdl->write_q[q].bfd; |
| 196 | |
| 197 | osmo_fd_unregister(read_ofd); |
| 198 | close(read_ofd->fd); |
| 199 | read_ofd->fd = -1; |
| 200 | |
| 201 | osmo_fd_unregister(write_ofd); |
| 202 | close(write_ofd->fd); |
| 203 | write_ofd->fd = -1; |
| 204 | |
| 205 | return 0; |
| 206 | } |