![Gregory Greenman](/assets/img/avatar_default.png)
This patch optimizes memory allocation. The cmd member of iwl_tx_queue was allocated previously as a continuous block of memory. This patch allocates separate memory chunks for each command and maps/unmaps these chunks in the run time. Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Zhu Yi <yi.zhu@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
284 lines
7.5 KiB
C
284 lines
7.5 KiB
C
/******************************************************************************
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Tomas Winkler <tomas.winkler@intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/version.h>
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#include <net/mac80211.h>
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#include "iwl-dev.h" /* FIXME: remove */
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#include "iwl-debug.h"
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#include "iwl-eeprom.h"
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#include "iwl-core.h"
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#define IWL_CMD(x) case x : return #x
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const char *get_cmd_string(u8 cmd)
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{
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switch (cmd) {
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IWL_CMD(REPLY_ALIVE);
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IWL_CMD(REPLY_ERROR);
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IWL_CMD(REPLY_RXON);
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IWL_CMD(REPLY_RXON_ASSOC);
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IWL_CMD(REPLY_QOS_PARAM);
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IWL_CMD(REPLY_RXON_TIMING);
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IWL_CMD(REPLY_ADD_STA);
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IWL_CMD(REPLY_REMOVE_STA);
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IWL_CMD(REPLY_REMOVE_ALL_STA);
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IWL_CMD(REPLY_WEPKEY);
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IWL_CMD(REPLY_TX);
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IWL_CMD(REPLY_RATE_SCALE);
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IWL_CMD(REPLY_LEDS_CMD);
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IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
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IWL_CMD(COEX_PRIORITY_TABLE_CMD);
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IWL_CMD(RADAR_NOTIFICATION);
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IWL_CMD(REPLY_QUIET_CMD);
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IWL_CMD(REPLY_CHANNEL_SWITCH);
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IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
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IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
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IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
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IWL_CMD(POWER_TABLE_CMD);
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IWL_CMD(PM_SLEEP_NOTIFICATION);
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IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
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IWL_CMD(REPLY_SCAN_CMD);
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IWL_CMD(REPLY_SCAN_ABORT_CMD);
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IWL_CMD(SCAN_START_NOTIFICATION);
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IWL_CMD(SCAN_RESULTS_NOTIFICATION);
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IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
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IWL_CMD(BEACON_NOTIFICATION);
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IWL_CMD(REPLY_TX_BEACON);
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IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
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IWL_CMD(QUIET_NOTIFICATION);
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IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
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IWL_CMD(MEASURE_ABORT_NOTIFICATION);
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IWL_CMD(REPLY_BT_CONFIG);
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IWL_CMD(REPLY_STATISTICS_CMD);
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IWL_CMD(STATISTICS_NOTIFICATION);
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IWL_CMD(REPLY_CARD_STATE_CMD);
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IWL_CMD(CARD_STATE_NOTIFICATION);
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IWL_CMD(MISSED_BEACONS_NOTIFICATION);
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IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
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IWL_CMD(SENSITIVITY_CMD);
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IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
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IWL_CMD(REPLY_RX_PHY_CMD);
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IWL_CMD(REPLY_RX_MPDU_CMD);
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IWL_CMD(REPLY_RX);
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IWL_CMD(REPLY_COMPRESSED_BA);
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IWL_CMD(CALIBRATION_CFG_CMD);
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IWL_CMD(CALIBRATION_RES_NOTIFICATION);
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IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
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IWL_CMD(REPLY_TX_POWER_DBM_CMD);
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default:
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return "UNKNOWN";
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}
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}
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EXPORT_SYMBOL(get_cmd_string);
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#define HOST_COMPLETE_TIMEOUT (HZ / 2)
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static int iwl_generic_cmd_callback(struct iwl_priv *priv,
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struct iwl_cmd *cmd, struct sk_buff *skb)
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{
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struct iwl_rx_packet *pkt = NULL;
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if (!skb) {
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IWL_ERROR("Error: Response NULL in %s.\n",
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get_cmd_string(cmd->hdr.cmd));
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return 1;
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}
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pkt = (struct iwl_rx_packet *)skb->data;
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if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
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IWL_ERROR("Bad return from %s (0x%08X)\n",
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get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
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return 1;
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}
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IWL_DEBUG_HC("back from %s (0x%08X)\n",
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get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
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/* Let iwl_tx_complete free the response skb */
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return 1;
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}
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static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
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{
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int ret;
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BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
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/* An asynchronous command can not expect an SKB to be set. */
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BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
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/* Assign a generic callback if one is not provided */
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if (!cmd->meta.u.callback)
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cmd->meta.u.callback = iwl_generic_cmd_callback;
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if (test_bit(STATUS_EXIT_PENDING, &priv->status))
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return -EBUSY;
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ret = iwl_enqueue_hcmd(priv, cmd);
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if (ret < 0) {
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IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
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get_cmd_string(cmd->id), ret);
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return ret;
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}
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return 0;
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}
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int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
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{
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int cmd_idx;
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int ret;
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BUG_ON(cmd->meta.flags & CMD_ASYNC);
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/* A synchronous command can not have a callback set. */
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BUG_ON(cmd->meta.u.callback != NULL);
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if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
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IWL_ERROR("Error sending %s: Already sending a host command\n",
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get_cmd_string(cmd->id));
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ret = -EBUSY;
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goto out;
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}
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set_bit(STATUS_HCMD_ACTIVE, &priv->status);
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if (cmd->meta.flags & CMD_WANT_SKB)
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cmd->meta.source = &cmd->meta;
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cmd_idx = iwl_enqueue_hcmd(priv, cmd);
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if (cmd_idx < 0) {
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ret = cmd_idx;
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IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
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get_cmd_string(cmd->id), ret);
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goto out;
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}
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ret = wait_event_interruptible_timeout(priv->wait_command_queue,
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!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
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HOST_COMPLETE_TIMEOUT);
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if (!ret) {
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if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
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IWL_ERROR("Error sending %s: time out after %dms.\n",
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get_cmd_string(cmd->id),
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jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
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clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
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ret = -ETIMEDOUT;
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goto cancel;
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}
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}
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if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
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IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
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get_cmd_string(cmd->id));
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ret = -ECANCELED;
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goto fail;
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}
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if (test_bit(STATUS_FW_ERROR, &priv->status)) {
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IWL_DEBUG_INFO("Command %s failed: FW Error\n",
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get_cmd_string(cmd->id));
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ret = -EIO;
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goto fail;
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}
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if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
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IWL_ERROR("Error: Response NULL in '%s'\n",
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get_cmd_string(cmd->id));
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ret = -EIO;
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goto out;
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}
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ret = 0;
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goto out;
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cancel:
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if (cmd->meta.flags & CMD_WANT_SKB) {
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struct iwl_cmd *qcmd;
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/* Cancel the CMD_WANT_SKB flag for the cmd in the
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* TX cmd queue. Otherwise in case the cmd comes
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* in later, it will possibly set an invalid
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* address (cmd->meta.source). */
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qcmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
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qcmd->meta.flags &= ~CMD_WANT_SKB;
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}
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fail:
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if (cmd->meta.u.skb) {
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dev_kfree_skb_any(cmd->meta.u.skb);
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cmd->meta.u.skb = NULL;
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}
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out:
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clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
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return ret;
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}
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EXPORT_SYMBOL(iwl_send_cmd_sync);
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int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
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{
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if (cmd->meta.flags & CMD_ASYNC)
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return iwl_send_cmd_async(priv, cmd);
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return iwl_send_cmd_sync(priv, cmd);
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}
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EXPORT_SYMBOL(iwl_send_cmd);
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int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
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{
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struct iwl_host_cmd cmd = {
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.id = id,
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.len = len,
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.data = data,
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};
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return iwl_send_cmd_sync(priv, &cmd);
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}
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EXPORT_SYMBOL(iwl_send_cmd_pdu);
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int iwl_send_cmd_pdu_async(struct iwl_priv *priv,
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u8 id, u16 len, const void *data,
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int (*callback)(struct iwl_priv *priv,
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struct iwl_cmd *cmd,
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struct sk_buff *skb))
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{
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struct iwl_host_cmd cmd = {
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.id = id,
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.len = len,
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.data = data,
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};
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cmd.meta.flags |= CMD_ASYNC;
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cmd.meta.u.callback = callback;
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return iwl_send_cmd_async(priv, &cmd);
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}
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EXPORT_SYMBOL(iwl_send_cmd_pdu_async);
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