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/*
* Marvell Wireless LAN device driver: 802.11ac
*
* Copyright (C) 2013, 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"
/* 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, max_mcs;
u16 max_rate = 0;
u32 usr_vht_cap_info = 0;
struct mwifiex_adapter *adapter = priv->adapter;
/* tables of the MCS map to the highest data rate (in Mbps)
* supported for long GI
*/
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 */
};
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 */
};
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 = 0;
for (i = 0; i < 8; i++) {
max_mcs = (mcs_map >> (2 * i)) & 0x3;
if (max_mcs < 3)
nss = i;
}
max_mcs = (mcs_map >> (2 * nss)) & 0x3;
/* if max_mcs is 3, nss must be 0 (SS = 1). Thus, max mcs is MCS 9 */
if (max_mcs >= 3)
max_mcs = 2;
if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) {
/* support 160 MHz */
max_rate = max_rate_lgi_160MHZ[nss][max_mcs];
if (!max_rate)
/* MCS9 is not supported in NSS6 */
max_rate = max_rate_lgi_160MHZ[nss][max_mcs - 1];
} else {
max_rate = max_rate_lgi_80MHZ[nss][max_mcs];
if (!max_rate)
/* MCS9 is not supported in NSS3 */
max_rate = max_rate_lgi_80MHZ[nss][max_mcs - 1];
}
return max_rate;
}
static void
mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
{
struct mwifiex_adapter *adapter = priv->adapter;
if (bands & BAND_A)
vht_cap->vht_cap.vht_cap_info =
cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
else
vht_cap->vht_cap.vht_cap_info =
cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
}
static void
mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
struct mwifiex_ie_types_vhtcap *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->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 == NO_NSS_SUPPORT) ||
(mcs_resp == NO_NSS_SUPPORT))
SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
else
SET_VHTNSSMCS(mcs_map_result, nss,
min(mcs_user, mcs_resp));
}
vht_cap->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->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->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 == NO_NSS_SUPPORT) ||
(mcs_resp == NO_NSS_SUPPORT))
SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
else
SET_VHTNSSMCS(mcs_map_result, nss,
min(mcs_user, mcs_resp));
}
vht_cap->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->vht_cap.supp_mcs.tx_highest = cpu_to_le16(tmp);
return;
}
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 +
sizeof(struct ieee_types_header),
le16_to_cpu(vht_cap->header.len));
mwifiex_fill_vht_cap_tlv(priv, 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 == HostCmd_BSS_MODE_IBSS) {
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 +
sizeof(struct ieee_types_header),
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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