/****************************************************************************** * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2011 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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 *****************************************************************************/ #include #include #include #include #include "iwl-dev.h" #include "iwl-debug.h" #include "iwl-eeprom.h" #include "iwl-core.h" const char *il_get_cmd_string(u8 cmd) { switch (cmd) { IL_CMD(N_ALIVE); IL_CMD(N_ERROR); IL_CMD(C_RXON); IL_CMD(C_RXON_ASSOC); IL_CMD(C_QOS_PARAM); IL_CMD(C_RXON_TIMING); IL_CMD(C_ADD_STA); IL_CMD(C_REM_STA); IL_CMD(C_WEPKEY); IL_CMD(N_3945_RX); IL_CMD(C_TX); IL_CMD(C_RATE_SCALE); IL_CMD(C_LEDS); IL_CMD(C_TX_LINK_QUALITY_CMD); IL_CMD(C_CHANNEL_SWITCH); IL_CMD(N_CHANNEL_SWITCH); IL_CMD(C_SPECTRUM_MEASUREMENT); IL_CMD(N_SPECTRUM_MEASUREMENT); IL_CMD(C_POWER_TBL); IL_CMD(N_PM_SLEEP); IL_CMD(N_PM_DEBUG_STATS); IL_CMD(C_SCAN); IL_CMD(C_SCAN_ABORT); IL_CMD(N_SCAN_START); IL_CMD(N_SCAN_RESULTS); IL_CMD(N_SCAN_COMPLETE); IL_CMD(N_BEACON); IL_CMD(C_TX_BEACON); IL_CMD(C_TX_PWR_TBL); IL_CMD(C_BT_CONFIG); IL_CMD(C_STATS); IL_CMD(N_STATS); IL_CMD(N_CARD_STATE); IL_CMD(N_MISSED_BEACONS); IL_CMD(C_CT_KILL_CONFIG); IL_CMD(C_SENSITIVITY); IL_CMD(C_PHY_CALIBRATION); IL_CMD(N_RX_PHY); IL_CMD(N_RX_MPDU); IL_CMD(N_RX); IL_CMD(N_COMPRESSED_BA); default: return "UNKNOWN"; } } EXPORT_SYMBOL(il_get_cmd_string); #define HOST_COMPLETE_TIMEOUT (HZ / 2) static void il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd, struct il_rx_pkt *pkt) { if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { IL_ERR("Bad return from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); return; } #ifdef CONFIG_IWLEGACY_DEBUG switch (cmd->hdr.cmd) { case C_TX_LINK_QUALITY_CMD: case C_SENSITIVITY: D_HC_DUMP("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); break; default: D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); } #endif } static int il_send_cmd_async(struct il_priv *il, struct il_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 = il_generic_cmd_callback; if (test_bit(S_EXIT_PENDING, &il->status)) return -EBUSY; ret = il_enqueue_hcmd(il, cmd); if (ret < 0) { IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", il_get_cmd_string(cmd->id), ret); return ret; } return 0; } int il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd) { int cmd_idx; int ret; lockdep_assert_held(&il->mutex); BUG_ON(cmd->flags & CMD_ASYNC); /* A synchronous command can not have a callback set. */ BUG_ON(cmd->callback); D_INFO("Attempting to send sync command %s\n", il_get_cmd_string(cmd->id)); set_bit(S_HCMD_ACTIVE, &il->status); D_INFO("Setting HCMD_ACTIVE for command %s\n", il_get_cmd_string(cmd->id)); cmd_idx = il_enqueue_hcmd(il, cmd); if (cmd_idx < 0) { ret = cmd_idx; IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", il_get_cmd_string(cmd->id), ret); goto out; } ret = wait_event_timeout(il->wait_command_queue, !test_bit(S_HCMD_ACTIVE, &il->status), HOST_COMPLETE_TIMEOUT); if (!ret) { if (test_bit(S_HCMD_ACTIVE, &il->status)) { IL_ERR( "Error sending %s: time out after %dms.\n", il_get_cmd_string(cmd->id), jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); clear_bit(S_HCMD_ACTIVE, &il->status); D_INFO( "Clearing HCMD_ACTIVE for command %s\n", il_get_cmd_string(cmd->id)); ret = -ETIMEDOUT; goto cancel; } } if (test_bit(S_RF_KILL_HW, &il->status)) { IL_ERR("Command %s aborted: RF KILL Switch\n", il_get_cmd_string(cmd->id)); ret = -ECANCELED; goto fail; } if (test_bit(S_FW_ERROR, &il->status)) { IL_ERR("Command %s failed: FW Error\n", il_get_cmd_string(cmd->id)); ret = -EIO; goto fail; } if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) { IL_ERR("Error: Response NULL in '%s'\n", il_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). */ il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB; } fail: if (cmd->reply_page) { il_free_pages(il, cmd->reply_page); cmd->reply_page = 0; } out: return ret; } EXPORT_SYMBOL(il_send_cmd_sync); int il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd) { if (cmd->flags & CMD_ASYNC) return il_send_cmd_async(il, cmd); return il_send_cmd_sync(il, cmd); } EXPORT_SYMBOL(il_send_cmd); int il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data) { struct il_host_cmd cmd = { .id = id, .len = len, .data = data, }; return il_send_cmd_sync(il, &cmd); } EXPORT_SYMBOL(il_send_cmd_pdu); int il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data, void (*callback)(struct il_priv *il, struct il_device_cmd *cmd, struct il_rx_pkt *pkt)) { struct il_host_cmd cmd = { .id = id, .len = len, .data = data, }; cmd.flags |= CMD_ASYNC; cmd.callback = callback; return il_send_cmd_async(il, &cmd); } EXPORT_SYMBOL(il_send_cmd_pdu_async);