| /* |
| * This file is part of the UWB stack for linux. |
| * |
| * Copyright (c) 2020 Qorvo US, Inc. |
| * |
| * This software is provided under the GNU General Public License, version 2 |
| * (GPLv2), as well as under a Qorvo commercial license. |
| * |
| * You may choose to use this software under the terms of the GPLv2 License, |
| * version 2 ("GPLv2"), as published by the Free Software Foundation. |
| * You should have received a copy of the GPLv2 along with this program. If |
| * not, see <http://www.gnu.org/licenses/>. |
| * |
| * This program is distributed under the GPLv2 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 GPLv2 for more |
| * details. |
| * |
| * If you cannot meet the requirements of the GPLv2, you may not use this |
| * software for any purpose without first obtaining a commercial license from |
| * Qorvo. |
| * Please contact Qorvo to inquire about licensing terms. |
| * |
| * 802.15.4 mac common part sublayer, fira ranging region. |
| * |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/math64.h> |
| |
| #include <linux/netdevice.h> |
| |
| #include <net/mcps802154_schedule.h> |
| #include <net/fira_region_nl.h> |
| |
| #include "fira_region.h" |
| #include "fira_region_call.h" |
| #include "fira_access.h" |
| #include "fira_session.h" |
| |
| #include "warn_return.h" |
| |
| static struct mcps802154_region_ops fira_region_ops; |
| |
| static struct mcps802154_region *fira_open(struct mcps802154_llhw *llhw) |
| { |
| struct fira_local *local; |
| |
| local = kmalloc(sizeof(*local), GFP_KERNEL); |
| if (!local) |
| return NULL; |
| local->llhw = llhw; |
| local->region.ops = &fira_region_ops; |
| INIT_LIST_HEAD(&local->inactive_sessions); |
| INIT_LIST_HEAD(&local->active_sessions); |
| return &local->region; |
| } |
| |
| static void fira_close(struct mcps802154_region *region) |
| { |
| struct fira_local *local = region_to_local(region); |
| |
| kfree_sensitive(local); |
| } |
| |
| static int fira_call(struct mcps802154_region *region, u32 call_id, |
| const struct nlattr *attrs, const struct genl_info *info) |
| { |
| struct fira_local *local = region_to_local(region); |
| |
| switch (call_id) { |
| case FIRA_CALL_GET_CAPABILITIES: |
| return fira_get_capabilities(local, info); |
| case FIRA_CALL_SESSION_INIT: |
| case FIRA_CALL_SESSION_START: |
| case FIRA_CALL_SESSION_STOP: |
| case FIRA_CALL_SESSION_DEINIT: |
| case FIRA_CALL_SESSION_SET_PARAMS: |
| case FIRA_CALL_NEW_CONTROLEE: |
| case FIRA_CALL_DEL_CONTROLEE: |
| return fira_session_control(local, call_id, attrs, info); |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int fira_report_local_aoa(struct fira_local *local, struct sk_buff *msg, |
| const struct fira_local_aoa_info *info) |
| { |
| #define A(x) FIRA_RANGING_DATA_MEASUREMENTS_AOA_ATTR_##x |
| if (nla_put_u8(msg, A(RX_ANTENNA_PAIR), info->rx_ant_pair)) |
| goto nla_put_failure; |
| if (nla_put_s16(msg, A(AOA_2PI), info->aoa_2pi)) |
| goto nla_put_failure; |
| if (nla_put_s16(msg, A(PDOA_2PI), info->pdoa_2pi)) |
| goto nla_put_failure; |
| if (nla_put_u8(msg, A(AOA_FOM), info->aoa_fom)) |
| goto nla_put_failure; |
| #undef A |
| return 0; |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static int fira_report_measurement(struct fira_local *local, |
| struct sk_buff *msg, |
| const struct fira_ranging_info *ranging_info) |
| { |
| struct nlattr *aoa; |
| #define A(x) FIRA_RANGING_DATA_MEASUREMENTS_ATTR_##x |
| |
| if (nla_put_u16(msg, A(SHORT_ADDR), ranging_info->short_addr) || |
| nla_put_u8(msg, A(STATUS), ranging_info->failed ? 1 : 0)) |
| goto nla_put_failure; |
| |
| if (ranging_info->failed) |
| return 0; |
| |
| if (ranging_info->tof_present) { |
| static const u64 speed_of_light_mm_per_s = 299702547000ull; |
| u32 distance_mm = div64_u64( |
| ranging_info->tof_rctu * speed_of_light_mm_per_s, |
| (u64)local->llhw->dtu_freq_hz * local->llhw->dtu_rctu); |
| if (nla_put_u32(msg, A(DISTANCE_MM), distance_mm)) |
| goto nla_put_failure; |
| } |
| |
| if (ranging_info->local_aoa.present) { |
| aoa = nla_nest_start(msg, A(LOCAL_AOA)); |
| if (!aoa) |
| goto nla_put_failure; |
| if (fira_report_local_aoa(local, msg, &ranging_info->local_aoa)) |
| goto nla_put_failure; |
| nla_nest_end(msg, aoa); |
| } |
| if (ranging_info->local_aoa_azimuth.present) { |
| aoa = nla_nest_start(msg, A(LOCAL_AOA_AZIMUTH)); |
| if (!aoa) |
| goto nla_put_failure; |
| if (fira_report_local_aoa(local, msg, |
| &ranging_info->local_aoa_azimuth)) |
| goto nla_put_failure; |
| nla_nest_end(msg, aoa); |
| } |
| if (ranging_info->local_aoa_elevation.present) { |
| aoa = nla_nest_start(msg, A(LOCAL_AOA_ELEVATION)); |
| if (!aoa) |
| goto nla_put_failure; |
| if (fira_report_local_aoa(local, msg, |
| &ranging_info->local_aoa_elevation)) |
| goto nla_put_failure; |
| nla_nest_end(msg, aoa); |
| } |
| if (ranging_info->remote_aoa_azimuth_present) { |
| if (nla_put_s16(msg, A(REMOTE_AOA_AZIMUTH_2PI), |
| ranging_info->remote_aoa_azimuth_2pi)) |
| goto nla_put_failure; |
| if (ranging_info->remote_aoa_fom_present) { |
| if (nla_put_u8(msg, A(REMOTE_AOA_AZIMUTH_FOM), |
| ranging_info->remote_aoa_azimuth_fom)) |
| goto nla_put_failure; |
| } |
| } |
| if (ranging_info->remote_aoa_elevation_present) { |
| if (nla_put_s16(msg, A(REMOTE_AOA_ELEVATION_PI), |
| ranging_info->remote_aoa_elevation_pi)) |
| goto nla_put_failure; |
| if (ranging_info->remote_aoa_fom_present) { |
| if (nla_put_u8(msg, A(REMOTE_AOA_ELEVATION_FOM), |
| ranging_info->remote_aoa_elevation_fom)) |
| goto nla_put_failure; |
| } |
| } |
| |
| #undef A |
| return 0; |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| void fira_report(struct fira_local *local, struct fira_session *session, |
| bool add_measurements) |
| { |
| struct sk_buff *msg; |
| struct nlattr *data, *measurements, *measurement; |
| int block_duration_ms, i, r; |
| |
| msg = mcps802154_region_event_alloc_skb(local->llhw, &local->region, |
| FIRA_CALL_SESSION_NOTIFICATION, |
| session->event_portid, |
| NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| if (!msg) |
| return; |
| |
| if (nla_put_u32(msg, FIRA_CALL_ATTR_SESSION_ID, session->id)) |
| goto nla_put_failure; |
| |
| data = nla_nest_start(msg, FIRA_CALL_ATTR_RANGING_DATA); |
| if (!data) |
| goto nla_put_failure; |
| |
| block_duration_ms = session->params.block_duration_dtu / |
| (local->llhw->dtu_freq_hz / 1000); |
| if (nla_put_u32(msg, FIRA_RANGING_DATA_ATTR_BLOCK_INDEX, |
| session->block_index) || |
| nla_put_u32(msg, FIRA_RANGING_DATA_ATTR_RANGING_INTERVAL_MS, |
| block_duration_ms)) |
| goto nla_put_failure; |
| |
| if (session->stop_request) { |
| if (nla_put_u8(msg, FIRA_RANGING_DATA_ATTR_STOPPED, |
| FIRA_RANGING_DATA_ATTR_STOPPED_REQUEST)) |
| goto nla_put_failure; |
| } |
| |
| if (add_measurements) { |
| measurements = nla_nest_start( |
| msg, FIRA_RANGING_DATA_ATTR_MEASUREMENTS); |
| if (!measurements) |
| goto nla_put_failure; |
| |
| for (i = 0; i < local->n_ranging_info; i++) { |
| measurement = nla_nest_start(msg, 1); |
| if (fira_report_measurement(local, msg, |
| &local->ranging_info[i])) |
| goto nla_put_failure; |
| nla_nest_end(msg, measurement); |
| } |
| |
| nla_nest_end(msg, measurements); |
| } |
| |
| nla_nest_end(msg, data); |
| |
| r = mcps802154_region_event(local->llhw, msg); |
| if (r == -ECONNREFUSED) |
| /* TODO stop. */ |
| ; |
| return; |
| nla_put_failure: |
| kfree_skb(msg); |
| } |
| |
| static struct mcps802154_region_ops fira_region_ops = { |
| .owner = THIS_MODULE, |
| .name = "fira", |
| .open = fira_open, |
| .close = fira_close, |
| .call = fira_call, |
| .get_access = fira_get_access, |
| }; |
| |
| int __init fira_region_init(void) |
| { |
| int r; |
| |
| r = fira_crypto_test(); |
| WARN_RETURN(r); |
| |
| return mcps802154_region_register(&fira_region_ops); |
| } |
| |
| void __exit fira_region_exit(void) |
| { |
| mcps802154_region_unregister(&fira_region_ops); |
| } |
| |
| module_init(fira_region_init); |
| module_exit(fira_region_exit); |
| |
| MODULE_DESCRIPTION("FiRa Region for IEEE 802.15.4 MCPS"); |
| MODULE_AUTHOR("Nicolas Schodet <nicolas.schodet@qorvo.com>"); |
| MODULE_VERSION("1.0"); |
| MODULE_LICENSE("GPL v2"); |