iwlwifi: mvm: BT Coex add support for Co-running block

7265 features a new calibration which is called antenna
coupling. The purpose of this calibration (which isn't
really a calibration), is to measure the isolation between
the antennas and that can give us useful information for
the Coex modules.

With this information, we can tune the LookUpTables (LUTs)
that define the BT / WiFi contention policy.

The LUTs currently contain dummy values - but they will be
updated soon.

While at it, change the current code to stop duplicate the
host command while sending. This was needed back then, when
the command was short enough to be allocated on the stack.
Since then, the command grew a lot and is now allocated on
the heap - hence we can use the NOCOPY option instead.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/constants.h

@@ -82,5 +82,6 @@
 #define IWL_MVM_LOWLAT_SINGLE_BINDING_MAXDUR	24 /* TU */
 #define IWL_MVM_LOWLAT_DUAL_BINDING_MAXDUR	24 /* TU */
 #define IWL_MVM_BT_COEX_SYNC2SCO		1
+#define IWL_MVM_BT_COEX_CORUNNING		1
 
 #endif /* __MVM_CONSTANTS_H */

drivers/net/wireless/iwlwifi/mvm/debugfs.c

@@ -350,6 +350,9 @@ static ssize_t iwl_dbgfs_bt_notif_read(struct file *file, char __user *user_buf,
 			 le32_to_cpu(notif->secondary_ch_lut));
 	pos += scnprintf(buf+pos, bufsz-pos, "bt_activity_grading = %d\n",
 			 le32_to_cpu(notif->bt_activity_grading));
+	pos += scnprintf(buf+pos, bufsz-pos,
+			 "antenna isolation = %d CORUN LUT index = %d\n",
+			 mvm->last_ant_isol, mvm->last_corun_lut);
 
 	mutex_unlock(&mvm->mutex);
 

drivers/net/wireless/iwlwifi/mvm/fw-api-bt-coex.h

@@ -77,6 +77,7 @@
  * @BT_COEX_3W:
  * @BT_COEX_NW:
  * @BT_COEX_SYNC2SCO:
+ * @BT_COEX_CORUNNING:
  *
  * The COEX_MODE must be set for each command. Even if it is not changed.
  */
@@ -88,6 +89,7 @@ enum iwl_bt_coex_flags {
 	BT_COEX_3W			= 0x2 << BT_COEX_MODE_POS,
 	BT_COEX_NW			= 0x3 << BT_COEX_MODE_POS,
 	BT_COEX_SYNC2SCO		= BIT(7),
+	BT_COEX_CORUNNING		= BIT(8),
 };
 
 /*

drivers/net/wireless/iwlwifi/mvm/fw-api.h

@@ -95,6 +95,7 @@ enum {
 	/* PHY context commands */
 	PHY_CONTEXT_CMD = 0x8,
 	DBG_CFG = 0x9,
+	ANTENNA_COUPLING_NOTIFICATION = 0xa,
 
 	/* station table */
 	ADD_STA_KEY = 0x17,

drivers/net/wireless/iwlwifi/mvm/mvm.h

@@ -597,6 +597,8 @@ struct iwl_mvm {
 	u8 bt_kill_msk;
 	struct iwl_bt_coex_profile_notif last_bt_notif;
 	struct iwl_bt_coex_ci_cmd last_bt_ci_cmd;
+	u32 last_ant_isol;
+	u8 last_corun_lut;
 
 	/* Thermal Throttling and CTkill */
 	struct iwl_mvm_tt_mgmt thermal_throttle;
@@ -750,6 +752,9 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 			struct iwl_device_cmd *cmd);
 int iwl_mvm_rx_radio_ver(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 			 struct iwl_device_cmd *cmd);
+int iwl_mvm_rx_ant_coupling_notif(struct iwl_mvm *mvm,
+				  struct iwl_rx_cmd_buffer *rxb,
+				  struct iwl_device_cmd *cmd);
 int iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 			  struct iwl_device_cmd *cmd);
 int iwl_mvm_rx_card_state_notif(struct iwl_mvm *mvm,

drivers/net/wireless/iwlwifi/mvm/ops.c

@@ -220,6 +220,8 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 	RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 	RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
 	RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
+	RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
+		   iwl_mvm_rx_ant_coupling_notif, true),
 
 	RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 
@@ -321,6 +323,7 @@ static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 	CMD(MAC_PM_POWER_TABLE),
 	CMD(BT_COEX_CI),
 	CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
+	CMD(ANTENNA_COUPLING_NOTIFICATION),
 };
 #undef CMD