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16 Feb 2025 01:43:55 -0800 From: Miri Korenblit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org Subject: [PATCH 16/42] wifi: iwlwifi: mld: add file mcc.h/c Date: Sun, 16 Feb 2025 11:42:55 +0200 Message-Id: <20250216111648.51d1f50c48be.I4b7abd423406053c349e9a98b4b3597e562f0074@changeid> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250216094321.537988-1-miriam.rachel.korenblit@intel.com> References: <20250216094321.537988-1-miriam.rachel.korenblit@intel.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Organization: Intel Israel (74) Limited this file is handling mobile country/regdomain functionality Signed-off-by: Miri Korenblit --- drivers/net/wireless/intel/iwlwifi/mld/mcc.c | 329 +++++++++++++++++++ drivers/net/wireless/intel/iwlwifi/mld/mcc.h | 17 + 2 files changed, 346 insertions(+) create mode 100644 drivers/net/wireless/intel/iwlwifi/mld/mcc.c create mode 100644 drivers/net/wireless/intel/iwlwifi/mld/mcc.h diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mcc.c b/drivers/net/wireless/intel/iwlwifi/mld/mcc.c new file mode 100644 index 000000000000..daca14e208bd --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mld/mcc.c @@ -0,0 +1,329 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (C) 2024 Intel Corporation + */ + +#include +#include + +#include +#include + +#include "mld.h" +#include "hcmd.h" +#include "mcc.h" + +/* It is the caller's responsibility to free the pointer returned here */ +static struct iwl_mcc_update_resp_v8 * +iwl_mld_parse_mcc_update_resp_v8(const struct iwl_rx_packet *pkt) +{ + const struct iwl_mcc_update_resp_v8 *mcc_resp_v8 = (const void *)pkt->data; + int n_channels = __le32_to_cpu(mcc_resp_v8->n_channels); + struct iwl_mcc_update_resp_v8 *resp_cp; + int notif_len = struct_size(resp_cp, channels, n_channels); + + if (iwl_rx_packet_payload_len(pkt) != notif_len) + return ERR_PTR(-EINVAL); + + resp_cp = kmemdup(mcc_resp_v8, notif_len, GFP_KERNEL); + if (!resp_cp) + return ERR_PTR(-ENOMEM); + + return resp_cp; +} + +/* It is the caller's responsibility to free the pointer returned here */ +static struct iwl_mcc_update_resp_v8 * +iwl_mld_parse_mcc_update_resp_v5_v6(const struct iwl_rx_packet *pkt) +{ + const struct iwl_mcc_update_resp_v4 *mcc_resp_v4 = (const void *)pkt->data; + struct iwl_mcc_update_resp_v8 *resp_cp; + int n_channels = __le32_to_cpu(mcc_resp_v4->n_channels); + int resp_len; + + if (iwl_rx_packet_payload_len(pkt) != + struct_size(mcc_resp_v4, channels, n_channels)) + return ERR_PTR(-EINVAL); + + resp_len = struct_size(resp_cp, channels, n_channels); + resp_cp = kzalloc(resp_len, GFP_KERNEL); + if (!resp_cp) + return ERR_PTR(-ENOMEM); + + resp_cp->status = mcc_resp_v4->status; + resp_cp->mcc = mcc_resp_v4->mcc; + resp_cp->cap = cpu_to_le32(le16_to_cpu(mcc_resp_v4->cap)); + resp_cp->source_id = mcc_resp_v4->source_id; + resp_cp->geo_info = mcc_resp_v4->geo_info; + resp_cp->n_channels = mcc_resp_v4->n_channels; + memcpy(resp_cp->channels, mcc_resp_v4->channels, + n_channels * sizeof(__le32)); + + return resp_cp; +} + +/* It is the caller's responsibility to free the pointer returned here */ +static struct iwl_mcc_update_resp_v8 * +iwl_mld_update_mcc(struct iwl_mld *mld, const char *alpha2, + enum iwl_mcc_source src_id) +{ + int resp_ver = iwl_fw_lookup_notif_ver(mld->fw, LONG_GROUP, + MCC_UPDATE_CMD, 0); + struct iwl_mcc_update_cmd mcc_update_cmd = { + .mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]), + .source_id = (u8)src_id, + }; + struct iwl_mcc_update_resp_v8 *resp_cp; + struct iwl_rx_packet *pkt; + struct iwl_host_cmd cmd = { + .id = MCC_UPDATE_CMD, + .flags = CMD_WANT_SKB, + .data = { &mcc_update_cmd }, + .len[0] = sizeof(mcc_update_cmd), + }; + int ret; + u16 mcc; + + IWL_DEBUG_LAR(mld, "send MCC update to FW with '%c%c' src = %d\n", + alpha2[0], alpha2[1], src_id); + + ret = iwl_mld_send_cmd(mld, &cmd); + if (ret) + return ERR_PTR(ret); + + pkt = cmd.resp_pkt; + + /* For Wifi-7 radios, we get version 8 + * For Wifi-6E radios, we get version 6 + * For Wifi-6 radios, we get version 5, but 5, 6, and 4 are compatible. + */ + switch (resp_ver) { + case 5: + case 6: + resp_cp = iwl_mld_parse_mcc_update_resp_v5_v6(pkt); + break; + case 8: + resp_cp = iwl_mld_parse_mcc_update_resp_v8(pkt); + break; + default: + IWL_FW_CHECK_FAILED(mld, "Unknown MCC_UPDATE_CMD version %d\n", resp_ver); + resp_cp = ERR_PTR(-EINVAL); + } + + if (IS_ERR(resp_cp)) + goto exit; + + mcc = le16_to_cpu(resp_cp->mcc); + + IWL_FW_CHECK(mld, !mcc, "mcc can't be 0: %d\n", mcc); + + IWL_DEBUG_LAR(mld, + "MCC response status: 0x%x. new MCC: 0x%x ('%c%c')\n", + le32_to_cpu(resp_cp->status), mcc, mcc >> 8, mcc & 0xff); + +exit: + iwl_free_resp(&cmd); + return resp_cp; +} + +/* It is the caller's responsibility to free the pointer returned here */ +struct ieee80211_regdomain * +iwl_mld_get_regdomain(struct iwl_mld *mld, + const char *alpha2, + enum iwl_mcc_source src_id, + bool *changed) +{ + struct ieee80211_regdomain *regd = NULL; + struct iwl_mcc_update_resp_v8 *resp; + u8 resp_ver = iwl_fw_lookup_notif_ver(mld->fw, IWL_ALWAYS_LONG_GROUP, + MCC_UPDATE_CMD, 0); + + IWL_DEBUG_LAR(mld, "Getting regdomain data for %s from FW\n", alpha2); + + lockdep_assert_wiphy(mld->wiphy); + + resp = iwl_mld_update_mcc(mld, alpha2, src_id); + if (IS_ERR(resp)) { + IWL_DEBUG_LAR(mld, "Could not get update from FW %ld\n", + PTR_ERR(resp)); + resp = NULL; + goto out; + } + + if (changed) { + u32 status = le32_to_cpu(resp->status); + + *changed = (status == MCC_RESP_NEW_CHAN_PROFILE || + status == MCC_RESP_ILLEGAL); + } + IWL_DEBUG_LAR(mld, "MCC update response version: %d\n", resp_ver); + + regd = iwl_parse_nvm_mcc_info(mld->trans->dev, mld->cfg, + __le32_to_cpu(resp->n_channels), + resp->channels, + __le16_to_cpu(resp->mcc), + __le16_to_cpu(resp->geo_info), + le32_to_cpu(resp->cap), resp_ver); + + if (IS_ERR(regd)) { + IWL_DEBUG_LAR(mld, "Could not get parse update from FW %ld\n", + PTR_ERR(regd)); + goto out; + } + + IWL_DEBUG_LAR(mld, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n", + regd->alpha2, regd->alpha2[0], + regd->alpha2[1], resp->source_id); + + mld->mcc_src = resp->source_id; + + if (!iwl_puncturing_is_allowed_in_bios(mld->bios_enable_puncturing, + le16_to_cpu(resp->mcc))) + ieee80211_hw_set(mld->hw, DISALLOW_PUNCTURING); + else + __clear_bit(IEEE80211_HW_DISALLOW_PUNCTURING, mld->hw->flags); + +out: + kfree(resp); + return regd; +} + +/* It is the caller's responsibility to free the pointer returned here */ +static struct ieee80211_regdomain * +iwl_mld_get_current_regdomain(struct iwl_mld *mld, + bool *changed) +{ + return iwl_mld_get_regdomain(mld, "ZZ", + MCC_SOURCE_GET_CURRENT, changed); +} + +void iwl_mld_update_changed_regdomain(struct iwl_mld *mld) +{ + struct ieee80211_regdomain *regd; + bool changed; + + regd = iwl_mld_get_current_regdomain(mld, &changed); + + if (IS_ERR_OR_NULL(regd)) + return; + + if (changed) + regulatory_set_wiphy_regd(mld->wiphy, regd); + kfree(regd); +} + +static int iwl_mld_apply_last_mcc(struct iwl_mld *mld, + const char *alpha2) +{ + struct ieee80211_regdomain *regd; + u32 used_src; + bool changed; + int ret; + + /* save the last source in case we overwrite it below */ + used_src = mld->mcc_src; + + /* Notify the firmware we support wifi location updates */ + regd = iwl_mld_get_current_regdomain(mld, NULL); + if (!IS_ERR_OR_NULL(regd)) + kfree(regd); + + /* Now set our last stored MCC and source */ + regd = iwl_mld_get_regdomain(mld, alpha2, used_src, + &changed); + if (IS_ERR_OR_NULL(regd)) + return -EIO; + + /* update cfg80211 if the regdomain was changed */ + if (changed) + ret = regulatory_set_wiphy_regd_sync(mld->wiphy, regd); + else + ret = 0; + + kfree(regd); + return ret; +} + +int iwl_mld_init_mcc(struct iwl_mld *mld) +{ + const struct ieee80211_regdomain *r; + struct ieee80211_regdomain *regd; + char mcc[3]; + int retval; + + /* try to replay the last set MCC to FW */ + r = wiphy_dereference(mld->wiphy, mld->wiphy->regd); + + if (r) + return iwl_mld_apply_last_mcc(mld, r->alpha2); + + regd = iwl_mld_get_current_regdomain(mld, NULL); + if (IS_ERR_OR_NULL(regd)) + return -EIO; + + if (!iwl_bios_get_mcc(&mld->fwrt, mcc)) { + kfree(regd); + regd = iwl_mld_get_regdomain(mld, mcc, MCC_SOURCE_BIOS, NULL); + if (IS_ERR_OR_NULL(regd)) + return -EIO; + } + + retval = regulatory_set_wiphy_regd_sync(mld->wiphy, regd); + + kfree(regd); + return retval; +} + +static void iwl_mld_find_assoc_vif_iterator(void *data, u8 *mac, + struct ieee80211_vif *vif) +{ + bool *assoc = data; + + if (vif->type == NL80211_IFTYPE_STATION && + vif->cfg.assoc) + *assoc = true; +} + +static bool iwl_mld_is_a_vif_assoc(struct iwl_mld *mld) +{ + bool assoc = false; + + ieee80211_iterate_active_interfaces_atomic(mld->hw, + IEEE80211_IFACE_ITER_NORMAL, + iwl_mld_find_assoc_vif_iterator, + &assoc); + return assoc; +} + +void iwl_mld_handle_update_mcc(struct iwl_mld *mld, struct iwl_rx_packet *pkt) +{ + struct iwl_mcc_chub_notif *notif = (void *)pkt->data; + enum iwl_mcc_source src; + char mcc[3]; + struct ieee80211_regdomain *regd; + bool changed; + + lockdep_assert_wiphy(mld->wiphy); + + if (iwl_mld_is_a_vif_assoc(mld) && + notif->source_id == MCC_SOURCE_WIFI) { + IWL_DEBUG_LAR(mld, "Ignore mcc update while associated\n"); + return; + } + + mcc[0] = le16_to_cpu(notif->mcc) >> 8; + mcc[1] = le16_to_cpu(notif->mcc) & 0xff; + mcc[2] = '\0'; + src = notif->source_id; + + IWL_DEBUG_LAR(mld, + "RX: received chub update mcc cmd (mcc '%s' src %d)\n", + mcc, src); + regd = iwl_mld_get_regdomain(mld, mcc, src, &changed); + if (IS_ERR_OR_NULL(regd)) + return; + + if (changed) + regulatory_set_wiphy_regd(mld->hw->wiphy, regd); + kfree(regd); +} diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mcc.h b/drivers/net/wireless/intel/iwlwifi/mld/mcc.h new file mode 100644 index 000000000000..2b31e5b5e2ed --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mld/mcc.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* + * Copyright (C) 2024 Intel Corporation + */ +#ifndef __iwl_mld_mcc_h__ +#define __iwl_mld_mcc_h__ + +int iwl_mld_init_mcc(struct iwl_mld *mld); +void iwl_mld_handle_update_mcc(struct iwl_mld *mld, struct iwl_rx_packet *pkt); +void iwl_mld_update_changed_regdomain(struct iwl_mld *mld); +struct ieee80211_regdomain * +iwl_mld_get_regdomain(struct iwl_mld *mld, + const char *alpha2, + enum iwl_mcc_source src_id, + bool *changed); + +#endif /* __iwl_mld_mcc_h__ */