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Release 4.11 drivers/net/wireless/marvell/mwifiex/11ac.c

/*
 * Marvell Wireless LAN device driver: 802.11ac
 *
 * Copyright (C) 2013-2014, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "decl.h"
#include "ioctl.h"
#include "fw.h"
#include "main.h"
#include "11ac.h"

/* Tables of the MCS map to the highest data rate (in Mbps) supported
 * for long GI.
 */

static const u16 max_rate_lgi_80MHZ[8][3] = {
	{0x124, 0x15F, 0x186},	/* NSS = 1 */
	{0x249, 0x2BE, 0x30C},  /* NSS = 2 */
	{0x36D, 0x41D, 0x492},  /* NSS = 3 */
	{0x492, 0x57C, 0x618},  /* NSS = 4 */
	{0x5B6, 0x6DB, 0x79E},  /* NSS = 5 */
	{0x6DB, 0x83A, 0x0},    /* NSS = 6 */
	{0x7FF, 0x999, 0xAAA},  /* NSS = 7 */
	{0x924, 0xAF8, 0xC30}   /* NSS = 8 */
};


static const u16 max_rate_lgi_160MHZ[8][3] = {
	{0x249, 0x2BE, 0x30C},   /* NSS = 1 */
	{0x492, 0x57C, 0x618},   /* NSS = 2 */
	{0x6DB, 0x83A, 0x0},     /* NSS = 3 */
	{0x924, 0xAF8, 0xC30},   /* NSS = 4 */
	{0xB6D, 0xDB6, 0xF3C},   /* NSS = 5 */
	{0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
	{0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
	{0x1248, 0x15F0, 0x1860} /* NSS = 8 */
};

/* This function converts the 2-bit MCS map to the highest long GI
 * VHT data rate.
 */

static u16 mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private *priv, u8 bands, u16 mcs_map) { u8 i, nss, mcs; u16 max_rate = 0; u32 usr_vht_cap_info = 0; struct mwifiex_adapter *adapter = priv->adapter; if (bands & BAND_AAC) usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a; else usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg; /* find the max NSS supported */ nss = 1; for (i = 1; i <= 8; i++) { mcs = GET_VHTNSSMCS(mcs_map, i); if (mcs < IEEE80211_VHT_MCS_NOT_SUPPORTED) nss = i; } mcs = GET_VHTNSSMCS(mcs_map, nss); /* if mcs is 3, nss must be 1 (NSS = 1). Default mcs to MCS 0~9 */ if (mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED) mcs = IEEE80211_VHT_MCS_SUPPORT_0_9; if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) { /* support 160 MHz */ max_rate = max_rate_lgi_160MHZ[nss - 1][mcs]; if (!max_rate) /* MCS9 is not supported in NSS6 */ max_rate = max_rate_lgi_160MHZ[nss - 1][mcs - 1]; } else { max_rate = max_rate_lgi_80MHZ[nss - 1][mcs]; if (!max_rate) /* MCS9 is not supported in NSS3 */ max_rate = max_rate_lgi_80MHZ[nss - 1][mcs - 1]; } return max_rate; }

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static void mwifiex_fill_vht_cap_info(struct mwifiex_private *priv, struct ieee80211_vht_cap *vht_cap, u8 bands) { struct mwifiex_adapter *adapter = priv->adapter; if (bands & BAND_A) vht_cap->vht_cap_info = cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a); else vht_cap->vht_cap_info = cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg); }

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void mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv, struct ieee80211_vht_cap *vht_cap, u8 bands) { struct mwifiex_adapter *adapter = priv->adapter; u16 mcs_map_user, mcs_map_resp, mcs_map_result; u16 mcs_user, mcs_resp, nss, tmp; /* Fill VHT cap info */ mwifiex_fill_vht_cap_info(priv, vht_cap, bands); /* rx MCS Set: find the minimum of the user rx mcs and ap rx mcs */ mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support); mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map); mcs_map_result = 0; for (nss = 1; nss <= 8; nss++) { mcs_user = GET_VHTNSSMCS(mcs_map_user, nss); mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss); if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) || (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED)) SET_VHTNSSMCS(mcs_map_result, nss, IEEE80211_VHT_MCS_NOT_SUPPORTED); else SET_VHTNSSMCS(mcs_map_result, nss, min(mcs_user, mcs_resp)); } vht_cap->supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result); tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result); vht_cap->supp_mcs.rx_highest = cpu_to_le16(tmp); /* tx MCS Set: find the minimum of the user tx mcs and ap tx mcs */ mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support); mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); mcs_map_result = 0; for (nss = 1; nss <= 8; nss++) { mcs_user = GET_VHTNSSMCS(mcs_map_user, nss); mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss); if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) || (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED)) SET_VHTNSSMCS(mcs_map_result, nss, IEEE80211_VHT_MCS_NOT_SUPPORTED); else SET_VHTNSSMCS(mcs_map_result, nss, min(mcs_user, mcs_resp)); } vht_cap->supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result); tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result); vht_cap->supp_mcs.tx_highest = cpu_to_le16(tmp); return; }

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int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv, struct mwifiex_bssdescriptor *bss_desc, u8 **buffer) { struct mwifiex_ie_types_vhtcap *vht_cap; struct mwifiex_ie_types_oper_mode_ntf *oper_ntf; struct ieee_types_oper_mode_ntf *ieee_oper_ntf; struct mwifiex_ie_types_vht_oper *vht_op; struct mwifiex_adapter *adapter = priv->adapter; u8 supp_chwd_set; u32 usr_vht_cap_info; int ret_len = 0; if (bss_desc->bss_band & BAND_A) usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a; else usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg; /* VHT Capabilities IE */ if (bss_desc->bcn_vht_cap) { vht_cap = (struct mwifiex_ie_types_vhtcap *)*buffer; memset(vht_cap, 0, sizeof(*vht_cap)); vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY); vht_cap->header.len = cpu_to_le16(sizeof(struct ieee80211_vht_cap)); memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header), (u8 *)bss_desc->bcn_vht_cap, le16_to_cpu(vht_cap->header.len)); mwifiex_fill_vht_cap_tlv(priv, &vht_cap->vht_cap, bss_desc->bss_band); *buffer += sizeof(*vht_cap); ret_len += sizeof(*vht_cap); } /* VHT Operation IE */ if (bss_desc->bcn_vht_oper) { if (priv->bss_mode == NL80211_IFTYPE_STATION) { vht_op = (struct mwifiex_ie_types_vht_oper *)*buffer; memset(vht_op, 0, sizeof(*vht_op)); vht_op->header.type = cpu_to_le16(WLAN_EID_VHT_OPERATION); vht_op->header.len = cpu_to_le16(sizeof(*vht_op) - sizeof(struct mwifiex_ie_types_header)); memcpy((u8 *)vht_op + sizeof(struct mwifiex_ie_types_header), (u8 *)bss_desc->bcn_vht_oper, le16_to_cpu(vht_op->header.len)); /* negotiate the channel width and central freq * and keep the central freq as the peer suggests */ supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info); switch (supp_chwd_set) { case 0: vht_op->chan_width = min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ, bss_desc->bcn_vht_oper->chan_width); break; case 1: vht_op->chan_width = min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ, bss_desc->bcn_vht_oper->chan_width); break; case 2: vht_op->chan_width = min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ, bss_desc->bcn_vht_oper->chan_width); break; default: vht_op->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; break; } *buffer += sizeof(*vht_op); ret_len += sizeof(*vht_op); } } /* Operating Mode Notification IE */ if (bss_desc->oper_mode) { ieee_oper_ntf = bss_desc->oper_mode; oper_ntf = (void *)*buffer; memset(oper_ntf, 0, sizeof(*oper_ntf)); oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF); oper_ntf->header.len = cpu_to_le16(sizeof(u8)); oper_ntf->oper_mode = ieee_oper_ntf->oper_mode; *buffer += sizeof(*oper_ntf); ret_len += sizeof(*oper_ntf); } return ret_len; }

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int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv, struct host_cmd_ds_command *cmd, u16 cmd_action, struct mwifiex_11ac_vht_cfg *cfg) { struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg; cmd->command = cpu_to_le16(HostCmd_CMD_11AC_CFG); cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) + S_DS_GEN); vhtcfg->action = cpu_to_le16(cmd_action); vhtcfg->band_config = cfg->band_config; vhtcfg->misc_config = cfg->misc_config; vhtcfg->cap_info = cpu_to_le32(cfg->cap_info); vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set); vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set); return 0; }

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/* This function initializes the BlockACK setup information for given * mwifiex_private structure for 11ac enabled networks. */
void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv) { priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT; if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { priv->add_ba_param.tx_win_size = MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE; priv->add_ba_param.rx_win_size = MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE; } else { priv->add_ba_param.tx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE; priv->add_ba_param.rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE; } return; }

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bool mwifiex_is_bss_in_11ac_mode(struct mwifiex_private *priv) { struct mwifiex_bssdescriptor *bss_desc; struct ieee80211_vht_operation *vht_oper; bss_desc = &priv->curr_bss_params.bss_descriptor; vht_oper = bss_desc->bcn_vht_oper; if (!bss_desc->bcn_vht_cap || !vht_oper) return false; if (vht_oper->chan_width == IEEE80211_VHT_CHANWIDTH_USE_HT) return false; return true; }

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u8 mwifiex_get_center_freq_index(struct mwifiex_private *priv, u8 band, u32 pri_chan, u8 chan_bw) { u8 center_freq_idx = 0; if (band & BAND_AAC) { switch (pri_chan) { case 36: case 40: case 44: case 48: if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ) center_freq_idx = 42; break; case 52: case 56: case 60: case 64: if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ) center_freq_idx = 58; else if (chan_bw == IEEE80211_VHT_CHANWIDTH_160MHZ) center_freq_idx = 50; break; case 100: case 104: case 108: case 112: if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ) center_freq_idx = 106; break; case 116: case 120: case 124: case 128: if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ) center_freq_idx = 122; else if (chan_bw == IEEE80211_VHT_CHANWIDTH_160MHZ) center_freq_idx = 114; break; case 132: case 136: case 140: case 144: if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ) center_freq_idx = 138; break; case 149: case 153: case 157: case 161: if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ) center_freq_idx = 155; break; default: center_freq_idx = 42; } } return center_freq_idx; }

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Yogesh Ashok Powar128475.00%220.00%
Avinash Patil34019.86%330.00%
Bing Zhao875.08%440.00%
Xinming Hu10.06%110.00%
Total1712100.00%10100.00%
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