diff options
Diffstat (limited to 'net/wireless/reg.c')
| -rw-r--r-- | net/wireless/reg.c | 297 |
1 files changed, 207 insertions, 90 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c index f0541370e68e..f59aaac586f8 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -91,10 +91,6 @@ static struct regulatory_request __rcu *last_request = /* To trigger userspace events */ static struct platform_device *reg_pdev; -static struct device_type reg_device_type = { - .uevent = reg_device_uevent, -}; - /* * Central wireless core regulatory domains, we only need two, * the current one and a world regulatory domain in case we have no @@ -244,19 +240,21 @@ static char user_alpha2[2]; module_param(ieee80211_regdom, charp, 0444); MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); -static void reg_kfree_last_request(void) +static void reg_free_request(struct regulatory_request *lr) { - struct regulatory_request *lr; - - lr = get_last_request(); - if (lr != &core_request_world && lr) kfree_rcu(lr, rcu_head); } static void reg_update_last_request(struct regulatory_request *request) { - reg_kfree_last_request(); + struct regulatory_request *lr; + + lr = get_last_request(); + if (lr == request) + return; + + reg_free_request(lr); rcu_assign_pointer(last_request, request); } @@ -487,11 +485,16 @@ static inline void reg_regdb_query(const char *alpha2) {} /* * This lets us keep regulatory code which is updated on a regulatory - * basis in userspace. Country information is filled in by - * reg_device_uevent + * basis in userspace. */ static int call_crda(const char *alpha2) { + char country[12]; + char *env[] = { country, NULL }; + + snprintf(country, sizeof(country), "COUNTRY=%c%c", + alpha2[0], alpha2[1]); + if (!is_world_regdom((char *) alpha2)) pr_info("Calling CRDA for country: %c%c\n", alpha2[0], alpha2[1]); @@ -501,7 +504,7 @@ static int call_crda(const char *alpha2) /* query internal regulatory database (if it exists) */ reg_regdb_query(alpha2); - return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); + return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); } static enum reg_request_treatment @@ -522,6 +525,71 @@ bool reg_is_valid_request(const char *alpha2) return alpha2_equal(lr->alpha2, alpha2); } +static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) +{ + struct regulatory_request *lr = get_last_request(); + + /* + * Follow the driver's regulatory domain, if present, unless a country + * IE has been processed or a user wants to help complaince further + */ + if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && + lr->initiator != NL80211_REGDOM_SET_BY_USER && + wiphy->regd) + return get_wiphy_regdom(wiphy); + + return get_cfg80211_regdom(); +} + +unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, + const struct ieee80211_reg_rule *rule) +{ + const struct ieee80211_freq_range *freq_range = &rule->freq_range; + const struct ieee80211_freq_range *freq_range_tmp; + const struct ieee80211_reg_rule *tmp; + u32 start_freq, end_freq, idx, no; + + for (idx = 0; idx < rd->n_reg_rules; idx++) + if (rule == &rd->reg_rules[idx]) + break; + + if (idx == rd->n_reg_rules) + return 0; + + /* get start_freq */ + no = idx; + + while (no) { + tmp = &rd->reg_rules[--no]; + freq_range_tmp = &tmp->freq_range; + + if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) + break; + + freq_range = freq_range_tmp; + } + + start_freq = freq_range->start_freq_khz; + + /* get end_freq */ + freq_range = &rule->freq_range; + no = idx; + + while (no < rd->n_reg_rules - 1) { + tmp = &rd->reg_rules[++no]; + freq_range_tmp = &tmp->freq_range; + + if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) + break; + + freq_range = freq_range_tmp; + } + + end_freq = freq_range->end_freq_khz; + + return end_freq - start_freq; +} + /* Sanity check on a regulatory rule */ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) { @@ -630,7 +698,9 @@ reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, * Helper for regdom_intersect(), this does the real * mathematical intersection fun */ -static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, +static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, + const struct ieee80211_regdomain *rd2, + const struct ieee80211_reg_rule *rule1, const struct ieee80211_reg_rule *rule2, struct ieee80211_reg_rule *intersected_rule) { @@ -638,7 +708,7 @@ static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, struct ieee80211_freq_range *freq_range; const struct ieee80211_power_rule *power_rule1, *power_rule2; struct ieee80211_power_rule *power_rule; - u32 freq_diff; + u32 freq_diff, max_bandwidth1, max_bandwidth2; freq_range1 = &rule1->freq_range; freq_range2 = &rule2->freq_range; @@ -652,8 +722,32 @@ static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, freq_range2->start_freq_khz); freq_range->end_freq_khz = min(freq_range1->end_freq_khz, freq_range2->end_freq_khz); - freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, - freq_range2->max_bandwidth_khz); + + max_bandwidth1 = freq_range1->max_bandwidth_khz; + max_bandwidth2 = freq_range2->max_bandwidth_khz; + + if (rule1->flags & NL80211_RRF_AUTO_BW) + max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); + if (rule2->flags & NL80211_RRF_AUTO_BW) + max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); + + freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); + + intersected_rule->flags = rule1->flags | rule2->flags; + + /* + * In case NL80211_RRF_AUTO_BW requested for both rules + * set AUTO_BW in intersected rule also. Next we will + * calculate BW correctly in handle_channel function. + * In other case remove AUTO_BW flag while we calculate + * maximum bandwidth correctly and auto calculation is + * not required. + */ + if ((rule1->flags & NL80211_RRF_AUTO_BW) && + (rule2->flags & NL80211_RRF_AUTO_BW)) + intersected_rule->flags |= NL80211_RRF_AUTO_BW; + else + intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; if (freq_range->max_bandwidth_khz > freq_diff) @@ -664,7 +758,8 @@ static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, power_rule2->max_antenna_gain); - intersected_rule->flags = rule1->flags | rule2->flags; + intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, + rule2->dfs_cac_ms); if (!is_valid_reg_rule(intersected_rule)) return -EINVAL; @@ -713,7 +808,8 @@ regdom_intersect(const struct ieee80211_regdomain *rd1, rule1 = &rd1->reg_rules[x]; for (y = 0; y < rd2->n_reg_rules; y++) { rule2 = &rd2->reg_rules[y]; - if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) + if (!reg_rules_intersect(rd1, rd2, rule1, rule2, + &dummy_rule)) num_rules++; } } @@ -738,7 +834,8 @@ regdom_intersect(const struct ieee80211_regdomain *rd1, * a memcpy() */ intersected_rule = &rd->reg_rules[rule_idx]; - r = reg_rules_intersect(rule1, rule2, intersected_rule); + r = reg_rules_intersect(rd1, rd2, rule1, rule2, + intersected_rule); /* * No need to memset here the intersected rule here as * we're not using the stack anymore @@ -821,18 +918,8 @@ const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, u32 center_freq) { const struct ieee80211_regdomain *regd; - struct regulatory_request *lr = get_last_request(); - /* - * Follow the driver's regulatory domain, if present, unless a country - * IE has been processed or a user wants to help complaince further - */ - if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && - lr->initiator != NL80211_REGDOM_SET_BY_USER && - wiphy->regd) - regd = get_wiphy_regdom(wiphy); - else - regd = get_cfg80211_regdom(); + regd = reg_get_regdomain(wiphy); return freq_reg_info_regd(wiphy, center_freq, regd); } @@ -857,31 +944,42 @@ const char *reg_initiator_name(enum nl80211_reg_initiator initiator) EXPORT_SYMBOL(reg_initiator_name); #ifdef CONFIG_CFG80211_REG_DEBUG -static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, +static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, + struct ieee80211_channel *chan, const struct ieee80211_reg_rule *reg_rule) { const struct ieee80211_power_rule *power_rule; const struct ieee80211_freq_range *freq_range; - char max_antenna_gain[32]; + char max_antenna_gain[32], bw[32]; power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; if (!power_rule->max_antenna_gain) - snprintf(max_antenna_gain, 32, "N/A"); + snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); else - snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); + snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", + power_rule->max_antenna_gain); + + if (reg_rule->flags & NL80211_RRF_AUTO_BW) + snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", + freq_range->max_bandwidth_khz, + reg_get_max_bandwidth(regd, reg_rule)); + else + snprintf(bw, sizeof(bw), "%d KHz", + freq_range->max_bandwidth_khz); REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", chan->center_freq); - REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", + REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", freq_range->start_freq_khz, freq_range->end_freq_khz, - freq_range->max_bandwidth_khz, max_antenna_gain, + bw, max_antenna_gain, power_rule->max_eirp); } #else -static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, +static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, + struct ieee80211_channel *chan, const struct ieee80211_reg_rule *reg_rule) { return; @@ -903,6 +1001,8 @@ static void handle_channel(struct wiphy *wiphy, const struct ieee80211_freq_range *freq_range = NULL; struct wiphy *request_wiphy = NULL; struct regulatory_request *lr = get_last_request(); + const struct ieee80211_regdomain *regd; + u32 max_bandwidth_khz; request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); @@ -939,16 +1039,22 @@ static void handle_channel(struct wiphy *wiphy, return; } - chan_reg_rule_print_dbg(chan, reg_rule); + regd = reg_get_regdomain(wiphy); + chan_reg_rule_print_dbg(regd, chan, reg_rule); power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; - if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) + max_bandwidth_khz = freq_range->max_bandwidth_khz; + /* Check if auto calculation requested */ + if (reg_rule->flags & NL80211_RRF_AUTO_BW) + max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); + + if (max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; - if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) + if (max_bandwidth_khz < MHZ_TO_KHZ(80)) bw_flags |= IEEE80211_CHAN_NO_80MHZ; - if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) + if (max_bandwidth_khz < MHZ_TO_KHZ(160)) bw_flags |= IEEE80211_CHAN_NO_160MHZ; if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && @@ -977,6 +1083,14 @@ static void handle_channel(struct wiphy *wiphy, min_t(int, chan->orig_mag, MBI_TO_DBI(power_rule->max_antenna_gain)); chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); + + if (chan->flags & IEEE80211_CHAN_RADAR) { + if (reg_rule->dfs_cac_ms) + chan->dfs_cac_ms = reg_rule->dfs_cac_ms; + else + chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; + } + if (chan->orig_mpwr) { /* * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER @@ -1334,6 +1448,7 @@ static void handle_channel_custom(struct wiphy *wiphy, const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_power_rule *power_rule = NULL; const struct ieee80211_freq_range *freq_range = NULL; + u32 max_bandwidth_khz; reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), regd); @@ -1346,16 +1461,21 @@ static void handle_channel_custom(struct wiphy *wiphy, return; } - chan_reg_rule_print_dbg(chan, reg_rule); + chan_reg_rule_print_dbg(regd, chan, reg_rule); power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; - if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) + max_bandwidth_khz = freq_range->max_bandwidth_khz; + /* Check if auto calculation requested */ + if (reg_rule->flags & NL80211_RRF_AUTO_BW) + max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); + + if (max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; - if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) + if (max_bandwidth_khz < MHZ_TO_KHZ(80)) bw_flags |= IEEE80211_CHAN_NO_80MHZ; - if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) + if (max_bandwidth_khz < MHZ_TO_KHZ(160)) bw_flags |= IEEE80211_CHAN_NO_160MHZ; chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; @@ -1683,17 +1803,9 @@ static void reg_process_hint(struct regulatory_request *reg_request) struct wiphy *wiphy = NULL; enum reg_request_treatment treatment; - if (WARN_ON(!reg_request->alpha2)) - return; - if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); - if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { - kfree(reg_request); - return; - } - switch (reg_request->initiator) { case NL80211_REGDOM_SET_BY_CORE: reg_process_hint_core(reg_request); @@ -1703,23 +1815,33 @@ static void reg_process_hint(struct regulatory_request *reg_request) if (treatment == REG_REQ_IGNORE || treatment == REG_REQ_ALREADY_SET) return; - schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); + queue_delayed_work(system_power_efficient_wq, + ®_timeout, msecs_to_jiffies(3142)); return; case NL80211_REGDOM_SET_BY_DRIVER: + if (!wiphy) + goto out_free; treatment = reg_process_hint_driver(wiphy, reg_request); break; case NL80211_REGDOM_SET_BY_COUNTRY_IE: + if (!wiphy) + goto out_free; treatment = reg_process_hint_country_ie(wiphy, reg_request); break; default: WARN(1, "invalid initiator %d\n", reg_request->initiator); - return; + goto out_free; } /* This is required so that the orig_* parameters are saved */ if (treatment == REG_REQ_ALREADY_SET && wiphy && wiphy->regulatory_flags & REGULATORY_STRICT_REG) wiphy_update_regulatory(wiphy, reg_request->initiator); + + return; + +out_free: + kfree(reg_request); } /* @@ -2147,31 +2269,49 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd) const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_freq_range *freq_range = NULL; const struct ieee80211_power_rule *power_rule = NULL; + char bw[32], cac_time[32]; - pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); + pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); for (i = 0; i < rd->n_reg_rules; i++) { reg_rule = &rd->reg_rules[i]; freq_range = ®_rule->freq_range; power_rule = ®_rule->power_rule; + if (reg_rule->flags & NL80211_RRF_AUTO_BW) + snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", + freq_range->max_bandwidth_khz, + reg_get_max_bandwidth(rd, reg_rule)); + else + snprintf(bw, sizeof(bw), "%d KHz", + freq_range->max_bandwidth_khz); + + if (reg_rule->flags & NL80211_RRF_DFS) + scnprintf(cac_time, sizeof(cac_time), "%u s", + reg_rule->dfs_cac_ms/1000); + else + scnprintf(cac_time, sizeof(cac_time), "N/A"); + + /* * There may not be documentation for max antenna gain * in certain regions */ if (power_rule->max_antenna_gain) - pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", + pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", freq_range->start_freq_khz, freq_range->end_freq_khz, - freq_range->max_bandwidth_khz, + bw, power_rule->max_antenna_gain, - power_rule->max_eirp); + power_rule->max_eirp, + cac_time); else - pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", + pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", freq_range->start_freq_khz, freq_range->end_freq_khz, - freq_range->max_bandwidth_khz, - power_rule->max_eirp); + bw, + power_rule->max_eirp, + cac_time); } } @@ -2244,9 +2384,6 @@ static int reg_set_rd_user(const struct ieee80211_regdomain *rd, { const struct ieee80211_regdomain *intersected_rd = NULL; - if (is_world_regdom(rd->alpha2)) - return -EINVAL; - if (!regdom_changes(rd->alpha2)) return -EALREADY; @@ -2294,7 +2431,8 @@ static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); if (!request_wiphy) { - schedule_delayed_work(®_timeout, 0); + queue_delayed_work(system_power_efficient_wq, + ®_timeout, 0); return -ENODEV; } @@ -2354,7 +2492,8 @@ static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); if (!request_wiphy) { - schedule_delayed_work(®_timeout, 0); + queue_delayed_work(system_power_efficient_wq, + ®_timeout, 0); return -ENODEV; } @@ -2433,26 +2572,6 @@ int set_regdom(const struct ieee80211_regdomain *rd) return 0; } -int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) -{ - struct regulatory_request *lr; - u8 alpha2[2]; - bool add = false; - - rcu_read_lock(); - lr = get_last_request(); - if (lr && !lr->processed) { - memcpy(alpha2, lr->alpha2, 2); - add = true; - } - rcu_read_unlock(); - - if (add) - return add_uevent_var(env, "COUNTRY=%c%c", - alpha2[0], alpha2[1]); - return 0; -} - void wiphy_regulatory_register(struct wiphy *wiphy) { struct regulatory_request *lr; @@ -2503,8 +2622,6 @@ int __init regulatory_init(void) if (IS_ERR(reg_pdev)) return PTR_ERR(reg_pdev); - reg_pdev->dev.type = ®_device_type; - spin_lock_init(®_requests_lock); spin_lock_init(®_pending_beacons_lock); |