[PATCH v8 5/6] iwlwifi: mvm: add vendor commands needed for iwlmei

Emmanuel Grumbach
2021-11-12T06:28:34Z

Add the vendor commands that must be used by the network manager
to allow proper operation of iwlmei.

* Send information on the AP CSME is connected to
* Notify the userspace when roaming is forbidden
* Allow the userspace to require ownership

Co-Developed-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

v6: remove the VENDOR_CMDS Kconfig option and make the whole infra
depend on IWLMEI directly
v7: remove // comments
remove an unneeded function
---
.../net/wireless/intel/iwlwifi/mvm/Makefile | 1 +
.../net/wireless/intel/iwlwifi/mvm/mac80211.c | 2 +
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 20 ++-
.../wireless/intel/iwlwifi/mvm/vendor-cmd.c | 151 ++++++++++++++++++
4 files changed, 168 insertions(+), 6 deletions(-)
create mode 100644 drivers/net/wireless/intel/iwlwifi/mvm/vendor-cmd.c

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/Makefile b/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
index 75fc2d935e5d..11e814b7cad0 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/Makefile
@@ -10,5 +10,6 @@ iwlmvm-y += rfi.o
iwlmvm-$(CONFIG_IWLWIFI_DEBUGFS) += debugfs.o debugfs-vif.o
iwlmvm-$(CONFIG_IWLWIFI_LEDS) += led.o
iwlmvm-$(CONFIG_PM) += d3.o
+iwlmvm-$(CONFIG_IWLMEI) += vendor-cmd.o

ccflags-y += -I $(srctree)/$(src)/../
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index c96a0ece8066..9a666cc259f4 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -720,6 +720,8 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
wiphy_ext_feature_set(hw->wiphy,
NL80211_EXT_FEATURE_PROTECTED_TWT);

+ iwl_mvm_vendor_cmds_register(mvm);
+
hw->wiphy->available_antennas_tx = iwl_mvm_get_valid_tx_ant(mvm);
hw->wiphy->available_antennas_rx = iwl_mvm_get_valid_rx_ant(mvm);

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 515591b29b0c..34b4a280a293 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1959,6 +1959,17 @@ void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm);
int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm);
int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 budget);

+#if IS_ENABLED(CONFIG_IWLMEI)
+
+/* vendor commands */
+void iwl_mvm_vendor_cmds_register(struct iwl_mvm *mvm);
+
+#else
+
+static inline void iwl_mvm_vendor_cmds_register(struct iwl_mvm *mvm) {}
+
+#endif
+
/* Location Aware Regulatory */
struct iwl_mcc_update_resp *
iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2,
@@ -2213,11 +2224,8 @@ static inline void iwl_mvm_mei_set_sw_rfkill_state(struct iwl_mvm *mvm, bool sw_
iwl_mei_set_rfkill_state(iwl_mvm_is_radio_killed(mvm), sw_rfkill);
}

-static inline void iwl_mvm_send_roaming_forbidden_event(struct iwl_mvm *mvm,
- struct ieee80211_vif *vif,
- bool forbidden)
-{
- /* TODO */
-}
+void iwl_mvm_send_roaming_forbidden_event(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif,
+ bool forbidden);

#endif /* __IWL_MVM_H__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/vendor-cmd.c b/drivers/net/wireless/intel/iwlwifi/mvm/vendor-cmd.c
new file mode 100644
index 000000000000..f702ad85e609
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/vendor-cmd.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021 Intel Corporation
+ */
+#include "mvm.h"
+#include <linux/nl80211-vnd-intel.h>
+
+static const struct nla_policy
+iwl_mvm_vendor_attr_policy[NUM_IWL_MVM_VENDOR_ATTR] = {
+ [IWL_MVM_VENDOR_ATTR_ROAMING_FORBIDDEN] = { .type = NLA_U8 },
+ [IWL_MVM_VENDOR_ATTR_AUTH_MODE] = { .type = NLA_U32 },
+ [IWL_MVM_VENDOR_ATTR_CHANNEL_NUM] = { .type = NLA_U8 },
+ [IWL_MVM_VENDOR_ATTR_SSID] = { .type = NLA_BINARY,
+ .len = IEEE80211_MAX_SSID_LEN },
+ [IWL_MVM_VENDOR_ATTR_BAND] = { .type = NLA_U8 },
+ [IWL_MVM_VENDOR_ATTR_COLLOC_CHANNEL] = { .type = NLA_U8 },
+ [IWL_MVM_VENDOR_ATTR_COLLOC_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN },
+};
+
+static int iwl_mvm_vendor_get_csme_conn_info(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ const void *data, int data_len)
+{
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+ struct iwl_mvm_csme_conn_info *csme_conn_info;
+ struct sk_buff *skb;
+ int err = 0;
+
+ mutex_lock(&mvm->mutex);
+ csme_conn_info = iwl_mvm_get_csme_conn_info(mvm);
+
+ if (!csme_conn_info) {
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 200);
+ if (!skb) {
+ err = -ENOMEM;
+ goto out_unlock;
+ }
+
+ if (nla_put_u32(skb, IWL_MVM_VENDOR_ATTR_AUTH_MODE,
+ csme_conn_info->conn_info.auth_mode) ||
+ nla_put(skb, IWL_MVM_VENDOR_ATTR_SSID,
+ csme_conn_info->conn_info.ssid_len,
+ csme_conn_info->conn_info.ssid) ||
+ nla_put_u32(skb, IWL_MVM_VENDOR_ATTR_STA_CIPHER,
+ csme_conn_info->conn_info.pairwise_cipher) ||
+ nla_put_u8(skb, IWL_MVM_VENDOR_ATTR_CHANNEL_NUM,
+ csme_conn_info->conn_info.channel) ||
+ nla_put(skb, IWL_MVM_VENDOR_ATTR_ADDR, ETH_ALEN,
+ csme_conn_info->conn_info.bssid)) {
+ kfree_skb(skb);
+ err = -ENOBUFS;
+ }
+
+out_unlock:
+ mutex_unlock(&mvm->mutex);
+ if (err)
+ return err;
+
+ return cfg80211_vendor_cmd_reply(skb);
+}
+
+static int iwl_mvm_vendor_host_get_ownership(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ const void *data, int data_len)
+{
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+
+ mutex_lock(&mvm->mutex);
+ iwl_mvm_mei_get_ownership(mvm);
+ mutex_unlock(&mvm->mutex);
+
+ return 0;
+}
+
+static const struct wiphy_vendor_command iwl_mvm_vendor_commands[] = {
+ {
+ .info = {
+ .vendor_id = INTEL_OUI,
+ .subcmd = IWL_MVM_VENDOR_CMD_GET_CSME_CONN_INFO,
+ },
+ .doit = iwl_mvm_vendor_get_csme_conn_info,
+ .flags = WIPHY_VENDOR_CMD_NEED_WDEV,
+ .policy = iwl_mvm_vendor_attr_policy,
+ .maxattr = MAX_IWL_MVM_VENDOR_ATTR,
+ },
+ {
+ .info = {
+ .vendor_id = INTEL_OUI,
+ .subcmd = IWL_MVM_VENDOR_CMD_HOST_GET_OWNERSHIP,
+ },
+ .doit = iwl_mvm_vendor_host_get_ownership,
+ .flags = WIPHY_VENDOR_CMD_NEED_WDEV,
+ .policy = iwl_mvm_vendor_attr_policy,
+ .maxattr = MAX_IWL_MVM_VENDOR_ATTR,
+ },
+};
+
+enum iwl_mvm_vendor_events_idx {
+ /* 0x0 - 0x3 are deprecated */
+ IWL_MVM_VENDOR_EVENT_IDX_ROAMING_FORBIDDEN = 4,
+ NUM_IWL_MVM_VENDOR_EVENT_IDX
+};
+
+static const struct nl80211_vendor_cmd_info
+iwl_mvm_vendor_events[NUM_IWL_MVM_VENDOR_EVENT_IDX] = {
+ [IWL_MVM_VENDOR_EVENT_IDX_ROAMING_FORBIDDEN] = {
+ .vendor_id = INTEL_OUI,
+ .subcmd = IWL_MVM_VENDOR_CMD_ROAMING_FORBIDDEN_EVENT,
+ },
+};
+
+void iwl_mvm_vendor_cmds_register(struct iwl_mvm *mvm)
+{
+ mvm->hw->wiphy->vendor_commands = iwl_mvm_vendor_commands;
+ mvm->hw->wiphy->n_vendor_commands = ARRAY_SIZE(iwl_mvm_vendor_commands);
+ mvm->hw->wiphy->vendor_events = iwl_mvm_vendor_events;
+ mvm->hw->wiphy->n_vendor_events = ARRAY_SIZE(iwl_mvm_vendor_events);
+}
+
+void iwl_mvm_send_roaming_forbidden_event(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif,
+ bool forbidden)
+{
+ struct sk_buff *msg =
+ cfg80211_vendor_event_alloc(mvm->hw->wiphy,
+ ieee80211_vif_to_wdev(vif),
+ 200, IWL_MVM_VENDOR_EVENT_IDX_ROAMING_FORBIDDEN,
+ GFP_ATOMIC);
+ if (!msg)
+ return;
+
+ if (WARN_ON(!vif))
+ return;
+
+ if (nla_put(msg, IWL_MVM_VENDOR_ATTR_VIF_ADDR,
+ ETH_ALEN, vif->addr) ||
+ nla_put_u8(msg, IWL_MVM_VENDOR_ATTR_ROAMING_FORBIDDEN, forbidden))
+ goto nla_put_failure;
+
+ cfg80211_vendor_event(msg, GFP_ATOMIC);
+ return;
+
+ nla_put_failure:
+ kfree_skb(msg);
+}
--
2.25.1