/****************************************************************************** * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2010 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(COEX_MEDIUM_NOTIFICATION); IWL_CMD(COEX_EVENT_CMD); 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); IWL_CMD(TEMPERATURE_NOTIFICATION); IWL_CMD(TX_ANT_CONFIGURATION_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 iwl_rx_packet *pkt) { 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); IWL_DEBUG_INFO(priv, "Attempting to send sync command %s\n", get_cmd_string(cmd->id)); mutex_lock(&priv->sync_cmd_mutex); set_bit(STATUS_HCMD_ACTIVE, &priv->status); IWL_DEBUG_INFO(priv, "Setting HCMD_ACTIVE for command %s\n", get_cmd_string(cmd->id)); 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); IWL_DEBUG_INFO(priv, "Clearing HCMD_ACTIVE for command %s\n", get_cmd_string(cmd->id)); ret = -ETIMEDOUT; goto cancel; } } if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { IWL_ERR(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_ERR(priv, "Command %s failed: FW Error\n", get_cmd_string(cmd->id)); ret = -EIO; goto fail; } if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) { 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_page) { iwl_free_pages(priv, cmd->reply_page); cmd->reply_page = 0; } out: mutex_unlock(&priv->sync_cmd_mutex); 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 iwl_rx_packet *pkt)) { 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);