[PATCH v4 02/22] wifi: nxpwifi: add 802.11ac files

[Jeff Chen <jeff.chen_1@nxp.com>]

For client mode, NXP firmware will help association process via
host command HOST_CMD_802_11_ASSOCIATE. IEs for 802.11ac should be
converted from parameters passed from cfg80211 to TLVs appended
to host command HOST_CMD_802_11_ASSOCIATE.

For AP mode, IEs for 802.11ac should be converted from parameters
passed from cfg80211 to host command HOST_CMD_11AC_CFG.

Files in this commit will support 802.11ac features based on above
descriptions.

Signed-off-by: Jeff Chen <jeff.chen_1@nxp.com>
---
 drivers/net/wireless/nxp/nxpwifi/11ac.c | 289 ++++++++++++++++++++++++
 drivers/net/wireless/nxp/nxpwifi/11ac.h |  32 +++
 2 files changed, 321 insertions(+)
 create mode 100644 drivers/net/wireless/nxp/nxpwifi/11ac.c
 create mode 100644 drivers/net/wireless/nxp/nxpwifi/11ac.h

diff --git a/drivers/net/wireless/nxp/nxpwifi/11ac.c b/drivers/net/wireless/nxp/nxpwifi/11ac.c
new file mode 100644
index 000000000000..dde983d88945
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/11ac.c
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: 802.11ac
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "cfg.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
+nxpwifi_convert_mcsmap_to_maxrate(struct nxpwifi_private *priv,
+				  u16 bands, u16 mcs_map)
+{
+	u8 i, nss, mcs;
+	u16 max_rate = 0;
+	u32 usr_vht_cap_info = 0;
+	struct nxpwifi_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 (u32_get_bits(usr_vht_cap_info, IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK)) {
+		/* 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;
+}
+
+static void
+nxpwifi_fill_vht_cap_info(struct nxpwifi_private *priv,
+			  struct ieee80211_vht_cap *vht_cap, u16 bands)
+{
+	struct nxpwifi_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);
+}
+
+static void
+nxpwifi_fill_vht_cap_tlv(struct nxpwifi_private *priv,
+			 struct ieee80211_vht_cap *vht_cap, u16 bands)
+{
+	struct nxpwifi_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 */
+	nxpwifi_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 = nxpwifi_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 = nxpwifi_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
+	vht_cap->supp_mcs.tx_highest = cpu_to_le16(tmp);
+}
+
+int nxpwifi_cmd_append_11ac_tlv(struct nxpwifi_private *priv,
+				struct nxpwifi_bssdescriptor *bss_desc,
+				u8 **buffer)
+{
+	struct nxpwifi_ie_types_vhtcap *vht_cap;
+	struct nxpwifi_ie_types_oper_mode_ntf *oper_ntf;
+	struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
+	struct nxpwifi_ie_types_vht_oper *vht_op;
+	struct nxpwifi_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 nxpwifi_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 nxpwifi_ie_types_header),
+		       (u8 *)bss_desc->bcn_vht_cap,
+		       le16_to_cpu(vht_cap->header.len));
+
+		nxpwifi_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 nxpwifi_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 nxpwifi_ie_types_header));
+			memcpy((u8 *)vht_op +
+				sizeof(struct nxpwifi_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 = u32_get_bits(usr_vht_cap_info,
+						     IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
+
+			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;
+}
+
+int nxpwifi_cmd_11ac_cfg(struct nxpwifi_private *priv,
+			 struct host_cmd_ds_command *cmd, u16 cmd_action,
+			 struct nxpwifi_11ac_vht_cfg *cfg)
+{
+	struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;
+
+	cmd->command = cpu_to_le16(HOST_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;
+}
+
+/* This function initializes the BlockACK setup information for given
+ * nxpwifi_private structure for 11ac enabled networks.
+ */
+void nxpwifi_set_11ac_ba_params(struct nxpwifi_private *priv)
+{
+	priv->add_ba_param.timeout = NXPWIFI_DEFAULT_BLOCK_ACK_TIMEOUT;
+
+	if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_UAP) {
+		priv->add_ba_param.tx_win_size =
+			NXPWIFI_11AC_UAP_AMPDU_DEF_TXWINSIZE;
+		priv->add_ba_param.rx_win_size =
+			NXPWIFI_11AC_UAP_AMPDU_DEF_RXWINSIZE;
+	} else {
+		priv->add_ba_param.tx_win_size =
+			NXPWIFI_11AC_STA_AMPDU_DEF_TXWINSIZE;
+		priv->add_ba_param.rx_win_size =
+			NXPWIFI_11AC_STA_AMPDU_DEF_RXWINSIZE;
+	}
+}
diff --git a/drivers/net/wireless/nxp/nxpwifi/11ac.h b/drivers/net/wireless/nxp/nxpwifi/11ac.h
new file mode 100644
index 000000000000..c89956f247f4
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/11ac.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * NXP Wireless LAN device driver: 802.11ac
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#ifndef _NXPWIFI_11AC_H_
+#define _NXPWIFI_11AC_H_
+
+#define VHT_CFG_2GHZ BIT(0)
+#define VHT_CFG_5GHZ BIT(1)
+
+enum vht_cfg_misc_config {
+	VHT_CAP_TX_OPERATION = 1,
+	VHT_CAP_ASSOCIATION,
+	VHT_CAP_UAP_ONLY
+};
+
+#define DEFAULT_VHT_MCS_SET 0xfffe
+#define DISABLE_VHT_MCS_SET 0xffff
+
+#define VHT_BW_80_160_80P80 BIT(2)
+
+int nxpwifi_cmd_append_11ac_tlv(struct nxpwifi_private *priv,
+				struct nxpwifi_bssdescriptor *bss_desc,
+				u8 **buffer);
+int nxpwifi_cmd_11ac_cfg(struct nxpwifi_private *priv,
+			 struct host_cmd_ds_command *cmd, u16 cmd_action,
+			 struct nxpwifi_11ac_vht_cfg *cfg);
+
+#endif /* _NXPWIFI_11AC_H_ */
-- 
2.34.1