| /****************************************************************************** |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2008 - 2009 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: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| *****************************************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/sched.h> |
| #include <net/mac80211.h> |
| |
| #include "iwl-dev.h" /* FIXME: remove */ |
| #include "iwl-debug.h" |
| #include "iwl-eeprom.h" |
| #include "iwl-core.h" |
| |
| |
| 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_WEPKEY); |
| IWL_CMD(REPLY_3945_RX); |
| IWL_CMD(REPLY_TX); |
| IWL_CMD(REPLY_RATE_SCALE); |
| IWL_CMD(REPLY_LEDS_CMD); |
| IWL_CMD(REPLY_TX_LINK_QUALITY_CMD); |
| IWL_CMD(COEX_PRIORITY_TABLE_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); |
| IWL_CMD(CALIBRATION_CFG_CMD); |
| IWL_CMD(CALIBRATION_RES_NOTIFICATION); |
| IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION); |
| IWL_CMD(REPLY_TX_POWER_DBM_CMD); |
| default: |
| return "UNKNOWN"; |
| |
| } |
| } |
| EXPORT_SYMBOL(get_cmd_string); |
| |
| #define HOST_COMPLETE_TIMEOUT (HZ / 2) |
| |
| static void iwl_generic_cmd_callback(struct iwl_priv *priv, |
| struct iwl_device_cmd *cmd, |
| struct sk_buff *skb) |
| { |
| struct iwl_rx_packet *pkt = NULL; |
| |
| if (!skb) { |
| IWL_ERR(priv, "Error: Response NULL in %s.\n", |
| get_cmd_string(cmd->hdr.cmd)); |
| return; |
| } |
| |
| pkt = (struct iwl_rx_packet *)skb->data; |
| if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { |
| IWL_ERR(priv, "Bad return from %s (0x%08X)\n", |
| get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
| return; |
| } |
| |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| switch (cmd->hdr.cmd) { |
| case REPLY_TX_LINK_QUALITY_CMD: |
| case SENSITIVITY_CMD: |
| IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n", |
| get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
| break; |
| default: |
| IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n", |
| get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
| } |
| #endif |
| } |
| |
| static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd) |
| { |
| int ret; |
| |
| BUG_ON(!(cmd->flags & CMD_ASYNC)); |
| |
| /* An asynchronous command can not expect an SKB to be set. */ |
| BUG_ON(cmd->flags & CMD_WANT_SKB); |
| |
| /* Assign a generic callback if one is not provided */ |
| if (!cmd->callback) |
| cmd->callback = iwl_generic_cmd_callback; |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
| return -EBUSY; |
| |
| ret = iwl_enqueue_hcmd(priv, cmd); |
| if (ret < 0) { |
| IWL_ERR(priv, "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; |
| |
| BUG_ON(cmd->flags & CMD_ASYNC); |
| |
| /* A synchronous command can not have a callback set. */ |
| BUG_ON(cmd->callback); |
| |
| if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) { |
| IWL_ERR(priv, |
| "Error sending %s: Already sending a host command\n", |
| get_cmd_string(cmd->id)); |
| ret = -EBUSY; |
| goto out; |
| } |
| |
| set_bit(STATUS_HCMD_ACTIVE, &priv->status); |
| |
| cmd_idx = iwl_enqueue_hcmd(priv, cmd); |
| if (cmd_idx < 0) { |
| ret = cmd_idx; |
| IWL_ERR(priv, "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_ERR(priv, |
| "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(priv, "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(priv, "Command %s failed: FW Error\n", |
| get_cmd_string(cmd->id)); |
| ret = -EIO; |
| goto fail; |
| } |
| if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_skb) { |
| IWL_ERR(priv, "Error: Response NULL in '%s'\n", |
| get_cmd_string(cmd->id)); |
| ret = -EIO; |
| goto cancel; |
| } |
| |
| ret = 0; |
| goto out; |
| |
| cancel: |
| if (cmd->flags & CMD_WANT_SKB) { |
| /* |
| * 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). |
| */ |
| priv->txq[IWL_CMD_QUEUE_NUM].meta[cmd_idx].flags &= |
| ~CMD_WANT_SKB; |
| } |
| fail: |
| if (cmd->reply_skb) { |
| dev_kfree_skb_any(cmd->reply_skb); |
| cmd->reply_skb = NULL; |
| } |
| out: |
| clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status); |
| return ret; |
| } |
| EXPORT_SYMBOL(iwl_send_cmd_sync); |
| |
| int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd) |
| { |
| if (cmd->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, |
| void (*callback)(struct iwl_priv *priv, |
| struct iwl_device_cmd *cmd, |
| struct sk_buff *skb)) |
| { |
| struct iwl_host_cmd cmd = { |
| .id = id, |
| .len = len, |
| .data = data, |
| }; |
| |
| cmd.flags |= CMD_ASYNC; |
| cmd.callback = callback; |
| |
| return iwl_send_cmd_async(priv, &cmd); |
| } |
| EXPORT_SYMBOL(iwl_send_cmd_pdu_async); |