iwlwifi: move host command sending functions to core module

1. Host command sending functions moved from iwl4965-base.c to iwl-hcmd.c
in iwlcore module
2. enqueue_hcmd function currently stays in iwl4965-base.c. It is invoked
   through the new 'utils' field in priv's ops.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 251 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-hcmd.c b/drivers/net/wireless/iwlwifi/iwl-hcmd.c
new file mode 100644
index 000000000000..559ff739961e
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-hcmd.c
@@ -0,0 +1,251 @@
+/******************************************************************************
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Tomas Winkler <tomas.winkler@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <net/mac80211.h>
+
+#include "iwl-4965.h" /* FIXME: remove */
+#include "iwl-debug.h"
+#include "iwl-eeprom.h"
+#include "iwl-core.h"
+
+
+#define IWL_CMD(x) case x : return #x
+
+const char *get_cmd_string(u8 cmd)
+{
+	switch (cmd) {
+		IWL_CMD(REPLY_ALIVE);
+		IWL_CMD(REPLY_ERROR);
+		IWL_CMD(REPLY_RXON);
+		IWL_CMD(REPLY_RXON_ASSOC);
+		IWL_CMD(REPLY_QOS_PARAM);
+		IWL_CMD(REPLY_RXON_TIMING);
+		IWL_CMD(REPLY_ADD_STA);
+		IWL_CMD(REPLY_REMOVE_STA);
+		IWL_CMD(REPLY_REMOVE_ALL_STA);
+		IWL_CMD(REPLY_TX);
+		IWL_CMD(REPLY_RATE_SCALE);
+		IWL_CMD(REPLY_LEDS_CMD);
+		IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
+		IWL_CMD(RADAR_NOTIFICATION);
+		IWL_CMD(REPLY_QUIET_CMD);
+		IWL_CMD(REPLY_CHANNEL_SWITCH);
+		IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
+		IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
+		IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
+		IWL_CMD(POWER_TABLE_CMD);
+		IWL_CMD(PM_SLEEP_NOTIFICATION);
+		IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
+		IWL_CMD(REPLY_SCAN_CMD);
+		IWL_CMD(REPLY_SCAN_ABORT_CMD);
+		IWL_CMD(SCAN_START_NOTIFICATION);
+		IWL_CMD(SCAN_RESULTS_NOTIFICATION);
+		IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
+		IWL_CMD(BEACON_NOTIFICATION);
+		IWL_CMD(REPLY_TX_BEACON);
+		IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
+		IWL_CMD(QUIET_NOTIFICATION);
+		IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
+		IWL_CMD(MEASURE_ABORT_NOTIFICATION);
+		IWL_CMD(REPLY_BT_CONFIG);
+		IWL_CMD(REPLY_STATISTICS_CMD);
+		IWL_CMD(STATISTICS_NOTIFICATION);
+		IWL_CMD(REPLY_CARD_STATE_CMD);
+		IWL_CMD(CARD_STATE_NOTIFICATION);
+		IWL_CMD(MISSED_BEACONS_NOTIFICATION);
+		IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
+		IWL_CMD(SENSITIVITY_CMD);
+		IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
+		IWL_CMD(REPLY_RX_PHY_CMD);
+		IWL_CMD(REPLY_RX_MPDU_CMD);
+		IWL_CMD(REPLY_RX);
+		IWL_CMD(REPLY_COMPRESSED_BA);
+	default:
+		return "UNKNOWN";
+
+	}
+}
+EXPORT_SYMBOL(get_cmd_string);
+
+#define HOST_COMPLETE_TIMEOUT (HZ / 2)
+
+static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	int ret;
+
+	BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
+
+	/* An asynchronous command can not expect an SKB to be set. */
+	BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
+
+	/* An asynchronous command MUST have a callback. */
+	BUG_ON(!cmd->meta.u.callback);
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return -EBUSY;
+
+	ret = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
+	if (ret < 0) {
+		IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
+			  get_cmd_string(cmd->id), ret);
+		return ret;
+	}
+	return 0;
+}
+
+int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	int cmd_idx;
+	int ret;
+	static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
+
+	BUG_ON(cmd->meta.flags & CMD_ASYNC);
+
+	 /* A synchronous command can not have a callback set. */
+	BUG_ON(cmd->meta.u.callback != NULL);
+
+	if (atomic_xchg(&entry, 1)) {
+		IWL_ERROR("Error sending %s: Already sending a host command\n",
+			  get_cmd_string(cmd->id));
+		return -EBUSY;
+	}
+
+	set_bit(STATUS_HCMD_ACTIVE, &priv->status);
+
+	if (cmd->meta.flags & CMD_WANT_SKB)
+		cmd->meta.source = &cmd->meta;
+
+	cmd_idx = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
+	if (cmd_idx < 0) {
+		ret = cmd_idx;
+		IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
+			  get_cmd_string(cmd->id), ret);
+		goto out;
+	}
+
+	ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+			!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
+			HOST_COMPLETE_TIMEOUT);
+	if (!ret) {
+		if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
+			IWL_ERROR("Error sending %s: time out after %dms.\n",
+				  get_cmd_string(cmd->id),
+				  jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
+
+			clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
+			ret = -ETIMEDOUT;
+			goto cancel;
+		}
+	}
+
+	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
+		IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
+			       get_cmd_string(cmd->id));
+		ret = -ECANCELED;
+		goto fail;
+	}
+	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
+		IWL_DEBUG_INFO("Command %s failed: FW Error\n",
+			       get_cmd_string(cmd->id));
+		ret = -EIO;
+		goto fail;
+	}
+	if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
+		IWL_ERROR("Error: Response NULL in '%s'\n",
+			  get_cmd_string(cmd->id));
+		ret = -EIO;
+		goto out;
+	}
+
+	ret = 0;
+	goto out;
+
+cancel:
+	if (cmd->meta.flags & CMD_WANT_SKB) {
+		struct iwl_cmd *qcmd;
+
+		/* Cancel the CMD_WANT_SKB flag for the cmd in the
+		 * TX cmd queue. Otherwise in case the cmd comes
+		 * in later, it will possibly set an invalid
+		 * address (cmd->meta.source). */
+		qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
+		qcmd->meta.flags &= ~CMD_WANT_SKB;
+	}
+fail:
+	if (cmd->meta.u.skb) {
+		dev_kfree_skb_any(cmd->meta.u.skb);
+		cmd->meta.u.skb = NULL;
+	}
+out:
+	atomic_set(&entry, 0);
+	return ret;
+}
+EXPORT_SYMBOL(iwl_send_cmd_sync);
+
+int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	if (cmd->meta.flags & CMD_ASYNC)
+		return iwl_send_cmd_async(priv, cmd);
+
+	return iwl_send_cmd_sync(priv, cmd);
+}
+EXPORT_SYMBOL(iwl_send_cmd);
+
+int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
+{
+	struct iwl_host_cmd cmd = {
+		.id = id,
+		.len = len,
+		.data = data,
+	};
+
+	return iwl_send_cmd_sync(priv, &cmd);
+}
+EXPORT_SYMBOL(iwl_send_cmd_pdu);
+
+int iwl_send_cmd_pdu_async(struct iwl_priv *priv,
+			   u8 id, u16 len, const void *data,
+			   int (*callback)(struct iwl_priv *priv,
+					   struct iwl_cmd *cmd,
+					   struct sk_buff *skb))
+{
+	struct iwl_host_cmd cmd = {
+		.id = id,
+		.len = len,
+		.data = data,
+	};
+
+	cmd.meta.flags |= CMD_ASYNC;
+	cmd.meta.u.callback = callback;
+
+	return iwl_send_cmd_async(priv, &cmd);
+}
+EXPORT_SYMBOL(iwl_send_cmd_pdu_async);