FreeBSD/Linux Kernel Cross Reference
sys/dev/iwm/if_iwm_phy_ctxt.c

     /*      $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */
     
     /*
      * Copyright (c) 2014 genua mbh <info@genua.de>
      * Copyright (c) 2014 Fixup Software Ltd.
      *
      * Permission to use, copy, modify, and distribute this software for any
      * purpose with or without fee is hereby granted, provided that the above
      * copyright notice and this permission notice appear in all copies.
     *
     * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     */
    
    /*-
     * Based on BSD-licensed source modules in the Linux iwlwifi driver,
     * which were used as the reference documentation for this implementation.
     *
     * Driver version we are currently based off of is
     * Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd)
     *
     ***********************************************************************
     *
     * This file is provided under a dual BSD/GPLv2 license.  When using or
     * redistributing this file, you may do so under either license.
     *
     * GPL LICENSE SUMMARY
     *
     * Copyright(c) 2007 - 2013 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 COPYING.
     *
     * Contact Information:
     *  Intel Linux Wireless <ilw@linux.intel.com>
     * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
     *
     *
     * BSD LICENSE
     *
     * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     *
     *  * Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     *  * Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in
     *    the documentation and/or other materials provided with the
     *    distribution.
     *  * Neither the name Intel Corporation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*-
     * Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr>
     *
     * Permission to use, copy, modify, and distribute this software for any
     * purpose with or without fee is hereby granted, provided that the above
     * copyright notice and this permission notice appear in all copies.
     *
     * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    */
   #include <sys/cdefs.h>
   __FBSDID("$FreeBSD$");
   
   #include "opt_wlan.h"
   #include "opt_iwm.h"
   
   #include <sys/param.h>
   #include <sys/bus.h>
   #include <sys/conf.h>
   #include <sys/endian.h>
   #include <sys/firmware.h>
   #include <sys/kernel.h>
   #include <sys/malloc.h>
   #include <sys/mbuf.h>
   #include <sys/mutex.h>
   #include <sys/module.h>
   #include <sys/proc.h>
   #include <sys/rman.h>
   #include <sys/socket.h>
   #include <sys/sockio.h>
   #include <sys/sysctl.h>
   #include <sys/linker.h>
   
   #include <machine/bus.h>
   #include <machine/endian.h>
   #include <machine/resource.h>
   
   #include <dev/pci/pcivar.h>
   #include <dev/pci/pcireg.h>
   
   #include <net/bpf.h>
   
   #include <net/if.h>
   #include <net/if_var.h>
   #include <net/if_arp.h>
   #include <net/if_dl.h>
   #include <net/if_media.h>
   #include <net/if_types.h>
   
   #include <netinet/in.h>
   #include <netinet/in_systm.h>
   #include <netinet/if_ether.h>
   #include <netinet/ip.h>
   
   #include <net80211/ieee80211_var.h>
   #include <net80211/ieee80211_regdomain.h>
   #include <net80211/ieee80211_ratectl.h>
   #include <net80211/ieee80211_radiotap.h>
   
   #include <dev/iwm/if_iwmreg.h>
   #include <dev/iwm/if_iwmvar.h>
   #include <dev/iwm/if_iwm_debug.h>
   #include <dev/iwm/if_iwm_util.h>
   #include <dev/iwm/if_iwm_phy_ctxt.h>
   
   /*
    * BEGIN iwlwifi/mvm/phy-ctxt.c
    */
   
   /*
    * Construct the generic fields of the PHY context command
    */
   static void
   iwm_phy_ctxt_cmd_hdr(struct iwm_softc *sc, struct iwm_phy_ctxt *ctxt,
           struct iwm_phy_context_cmd *cmd, uint32_t action, uint32_t apply_time)
   {
           memset(cmd, 0, sizeof(struct iwm_phy_context_cmd));
   
           IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
               "%s: id=%d, colour=%d, action=%d, apply_time=%d\n",
               __func__,
               ctxt->id,
               ctxt->color,
               action,
               apply_time);
   
           cmd->id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(ctxt->id,
               ctxt->color));
           cmd->action = htole32(action);
           cmd->apply_time = htole32(apply_time);
   }
   
   /*
    * Add the phy configuration to the PHY context command
    */
   static void
   iwm_phy_ctxt_cmd_data(struct iwm_softc *sc,
           struct iwm_phy_context_cmd *cmd, struct ieee80211_channel *chan,
           uint8_t chains_static, uint8_t chains_dynamic)
   {
           struct ieee80211com *ic = &sc->sc_ic;
           uint8_t active_cnt, idle_cnt;
   
           IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
               "%s: 2ghz=%d, channel=%d, chains static=0x%x, dynamic=0x%x, "
               "rx_ant=0x%x, tx_ant=0x%x\n",
               __func__,
               !! IEEE80211_IS_CHAN_2GHZ(chan),
               ieee80211_chan2ieee(ic, chan),
               chains_static,
               chains_dynamic,
               iwm_get_valid_rx_ant(sc),
               iwm_get_valid_tx_ant(sc));
   
   
           cmd->ci.band = IEEE80211_IS_CHAN_2GHZ(chan) ?
               IWM_PHY_BAND_24 : IWM_PHY_BAND_5;
   
           cmd->ci.channel = ieee80211_chan2ieee(ic, chan);
           cmd->ci.width = IWM_PHY_VHT_CHANNEL_MODE20;
           cmd->ci.ctrl_pos = IWM_PHY_VHT_CTRL_POS_1_BELOW;
   
           /* Set rx the chains */
           idle_cnt = chains_static;
           active_cnt = chains_dynamic;
   
           /* In scenarios where we only ever use a single-stream rates,
            * i.e. legacy 11b/g/a associations, single-stream APs or even
            * static SMPS, enable both chains to get diversity, improving
            * the case where we're far enough from the AP that attenuation
            * between the two antennas is sufficiently different to impact
            * performance.
            */
           if (active_cnt == 1 && iwm_rx_diversity_allowed(sc)) {
                   idle_cnt = 2;
                   active_cnt = 2;
           }
   
           cmd->rxchain_info = htole32(iwm_get_valid_rx_ant(sc) <<
                                           IWM_PHY_RX_CHAIN_VALID_POS);
           cmd->rxchain_info |= htole32(idle_cnt << IWM_PHY_RX_CHAIN_CNT_POS);
           cmd->rxchain_info |= htole32(active_cnt <<
               IWM_PHY_RX_CHAIN_MIMO_CNT_POS);
   
           cmd->txchain_info = htole32(iwm_get_valid_tx_ant(sc));
   }
   
   /*
    * Send a command
    * only if something in the configuration changed: in case that this is the
    * first time that the phy configuration is applied or in case that the phy
    * configuration changed from the previous apply.
    */
   static int
   iwm_phy_ctxt_apply(struct iwm_softc *sc,
           struct iwm_phy_ctxt *ctxt,
           uint8_t chains_static, uint8_t chains_dynamic,
           uint32_t action, uint32_t apply_time)
   {
           struct iwm_phy_context_cmd cmd;
           int ret;
   
           IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
               "%s: called; channel=%p\n",
               __func__,
               ctxt->channel);
   
           /* Set the command header fields */
           iwm_phy_ctxt_cmd_hdr(sc, ctxt, &cmd, action, apply_time);
   
           /* Set the command data */
           iwm_phy_ctxt_cmd_data(sc, &cmd, ctxt->channel,
               chains_static, chains_dynamic);
   
           ret = iwm_send_cmd_pdu(sc, IWM_PHY_CONTEXT_CMD, IWM_CMD_SYNC,
               sizeof(struct iwm_phy_context_cmd), &cmd);
           if (ret) {
                   device_printf(sc->sc_dev,
                       "PHY ctxt cmd error. ret=%d\n", ret);
           }
           return ret;
   }
   
   /*
    * Send a command to add a PHY context based on the current HW configuration.
    */
   int
   iwm_phy_ctxt_add(struct iwm_softc *sc, struct iwm_phy_ctxt *ctxt,
           struct ieee80211_channel *chan,
           uint8_t chains_static, uint8_t chains_dynamic)
   {
           ctxt->channel = chan;
   
           IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
               "%s: called; channel=%d\n",
               __func__,
               ieee80211_chan2ieee(&sc->sc_ic, chan));
   
           return iwm_phy_ctxt_apply(sc, ctxt,
               chains_static, chains_dynamic, IWM_FW_CTXT_ACTION_ADD, 0);
   }
   
   /*
    * Send a command to modify the PHY context based on the current HW
    * configuration. Note that the function does not check that the configuration
    * changed.
    */
   int
   iwm_phy_ctxt_changed(struct iwm_softc *sc,
           struct iwm_phy_ctxt *ctxt, struct ieee80211_channel *chan,
           uint8_t chains_static, uint8_t chains_dynamic)
   {
           ctxt->channel = chan;
   
           IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
               "%s: called; channel=%d\n",
               __func__,
               ieee80211_chan2ieee(&sc->sc_ic, chan));
   
           return iwm_phy_ctxt_apply(sc, ctxt,
               chains_static, chains_dynamic, IWM_FW_CTXT_ACTION_MODIFY, 0);
   }
   
   /*
    * END iwlwifi/mvm/phy-ctxt.c
    */

Cache object: 85858bc9cd42c79186a43acf7a8f3412