wl12xx: add device role commands

The device role is a special role used for rx and tx frames
prior to association (as the STA role can get packets only
from its associated bssid)

Since this role is required for the sta association process,
we enable it when a new sta interface is created.
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/cmd.c

@@ -458,6 +458,97 @@ static void wl12xx_free_link(struct wl1271 *wl, u8 *hlid)
 	*hlid = WL12XX_INVALID_LINK_ID;
 }
 
+int wl12xx_cmd_role_start_dev(struct wl1271 *wl)
+{
+	struct wl12xx_cmd_role_start *cmd;
+	int ret;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	wl1271_debug(DEBUG_CMD, "cmd role start dev %d", wl->dev_role_id);
+
+	cmd->role_id = wl->dev_role_id;
+	if (wl->band == IEEE80211_BAND_5GHZ)
+		cmd->band = WL12XX_BAND_5GHZ;
+	cmd->channel = wl->channel;
+
+	if (wl->dev_hlid == WL12XX_INVALID_LINK_ID) {
+		ret = wl12xx_allocate_link(wl, &wl->dev_hlid);
+		if (ret)
+			goto out_free;
+	}
+	cmd->device.hlid = wl->dev_hlid;
+	cmd->device.session = wl->session_counter;
+
+	wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d",
+		     cmd->role_id, cmd->device.hlid, cmd->device.session);
+
+	ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
+	if (ret < 0) {
+		wl1271_error("failed to initiate cmd role enable");
+		goto err_hlid;
+	}
+
+	goto out_free;
+
+err_hlid:
+	/* clear links on error */
+	__clear_bit(wl->dev_hlid, wl->links_map);
+	wl->dev_hlid = WL12XX_INVALID_LINK_ID;
+
+
+out_free:
+	kfree(cmd);
+
+out:
+	return ret;
+}
+
+int wl12xx_cmd_role_stop_dev(struct wl1271 *wl)
+{
+	struct wl12xx_cmd_role_stop *cmd;
+	int ret;
+
+	if (WARN_ON(wl->dev_hlid == WL12XX_INVALID_LINK_ID))
+		return -EINVAL;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	wl1271_debug(DEBUG_CMD, "cmd role stop dev");
+
+	cmd->role_id = wl->dev_role_id;
+	cmd->disc_type = DISCONNECT_IMMEDIATE;
+	cmd->reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);
+
+	ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
+	if (ret < 0) {
+		wl1271_error("failed to initiate cmd role stop");
+		goto out_free;
+	}
+
+	ret = wl1271_cmd_wait_for_event(wl, DISCONNECT_EVENT_COMPLETE_ID);
+	if (ret < 0) {
+		wl1271_error("cmd role stop dev event completion error");
+		goto out_free;
+	}
+
+	wl12xx_free_link(wl, &wl->dev_hlid);
+
+out_free:
+	kfree(cmd);
+
+out:
+	return ret;
+}
+
 int wl12xx_cmd_role_start_sta(struct wl1271 *wl)
 {
 	struct wl12xx_cmd_role_start *cmd;

drivers/net/wireless/wl12xx/main.c

@@ -1866,6 +1866,20 @@ static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 		if (ret < 0)
 			goto power_off;
 
+		if (wl->bss_type == BSS_TYPE_STA_BSS) {
+			/*
+			 * The device role is a special role used for
+			 * rx and tx frames prior to association (as
+			 * the STA role can get packets only from
+			 * its associated bssid)
+			 */
+			ret = wl12xx_cmd_role_enable(wl,
+							 WL1271_ROLE_DEVICE,
+							 &wl->dev_role_id);
+			if (ret < 0)
+				goto irq_disable;
+		}
+
 		ret = wl12xx_cmd_role_enable(wl, role_type, &wl->role_id);
 		if (ret < 0)
 			goto irq_disable;
@@ -1965,6 +1979,12 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl,
 		if (ret < 0)
 			goto deinit;
 
+		if (wl->bss_type == BSS_TYPE_STA_BSS) {
+			ret = wl12xx_cmd_role_disable(wl, &wl->dev_role_id);
+			if (ret < 0)
+				goto deinit;
+		}
+
 		ret = wl12xx_cmd_role_disable(wl, &wl->role_id);
 		if (ret < 0)
 			goto deinit;
@@ -1973,6 +1993,7 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl,
 	}
 deinit:
 	wl->sta_hlid = WL12XX_INVALID_LINK_ID;
+	wl->dev_hlid = WL12XX_INVALID_LINK_ID;
 
 	/*
 	 * this must be before the cancel_work calls below, so that the work
@@ -2023,6 +2044,7 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl,
 	wl->ap_ps_map = 0;
 	wl->sched_scanning = false;
 	wl->role_id = WL12XX_INVALID_ROLE_ID;
+	wl->dev_role_id = WL12XX_INVALID_ROLE_ID;
 	memset(wl->roles_map, 0, sizeof(wl->roles_map));
 	memset(wl->links_map, 0, sizeof(wl->links_map));
 
@@ -4365,7 +4387,8 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 	wl->tx_security_last_seq_lsb = 0;
 	wl->role_id = WL12XX_INVALID_ROLE_ID;
 	wl->sta_hlid = WL12XX_INVALID_LINK_ID;
-
+	wl->dev_role_id = WL12XX_INVALID_ROLE_ID;
+	wl->dev_hlid = WL12XX_INVALID_LINK_ID;
 	setup_timer(&wl->rx_streaming_timer, wl1271_rx_streaming_timer,
 		    (unsigned long) wl);
 	wl->fwlog_size = 0;

drivers/net/wireless/wl12xx/wl12xx.h

@@ -394,6 +394,7 @@ struct wl1271 {
 	u8 ssid_len;
 	int channel;
 	u8 role_id;
+	u8 dev_role_id;
 	u8 sta_hlid;
 	u8 dev_hlid;