| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. |
| * All rights reserved. |
| * |
| * File: rxtx.c |
| * |
| * Purpose: handle WMAC/802.3/802.11 rx & tx functions |
| * |
| * Author: Lyndon Chen |
| * |
| * Date: May 20, 2003 |
| * |
| * Functions: |
| * vnt_generate_tx_parameter - Generate tx dma required parameter. |
| * vnt_get_duration_le - get tx data required duration |
| * vnt_get_rtscts_duration_le- get rtx/cts required duration |
| * vnt_get_rtscts_rsvtime_le- get rts/cts reserved time |
| * vnt_get_rsvtime- get frame reserved time |
| * vnt_fill_cts_head- fulfill CTS ctl header |
| * |
| * Revision History: |
| * |
| */ |
| |
| #include <linux/etherdevice.h> |
| #include "device.h" |
| #include "rxtx.h" |
| #include "card.h" |
| #include "mac.h" |
| #include "rf.h" |
| #include "usbpipe.h" |
| |
| static const u16 vnt_time_stampoff[2][MAX_RATE] = { |
| /* Long Preamble */ |
| {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23}, |
| |
| /* Short Preamble */ |
| {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23}, |
| }; |
| |
| static const u16 vnt_fb_opt0[2][5] = { |
| {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */ |
| {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */ |
| }; |
| |
| static const u16 vnt_fb_opt1[2][5] = { |
| {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */ |
| {RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */ |
| }; |
| |
| #define RTSDUR_BB 0 |
| #define RTSDUR_BA 1 |
| #define RTSDUR_AA 2 |
| #define CTSDUR_BA 3 |
| #define RTSDUR_BA_F0 4 |
| #define RTSDUR_AA_F0 5 |
| #define RTSDUR_BA_F1 6 |
| #define RTSDUR_AA_F1 7 |
| #define CTSDUR_BA_F0 8 |
| #define CTSDUR_BA_F1 9 |
| #define DATADUR_B 10 |
| #define DATADUR_A 11 |
| #define DATADUR_A_F0 12 |
| #define DATADUR_A_F1 13 |
| |
| static struct vnt_usb_send_context |
| *vnt_get_free_context(struct vnt_private *priv) |
| { |
| struct vnt_usb_send_context *context = NULL; |
| int ii; |
| |
| dev_dbg(&priv->usb->dev, "%s\n", __func__); |
| |
| for (ii = 0; ii < priv->num_tx_context; ii++) { |
| if (!priv->tx_context[ii]) |
| return NULL; |
| |
| context = priv->tx_context[ii]; |
| if (!context->in_use) { |
| context->in_use = true; |
| memset(context->data, 0, |
| MAX_TOTAL_SIZE_WITH_ALL_HEADERS); |
| |
| context->hdr = NULL; |
| |
| return context; |
| } |
| } |
| |
| if (ii == priv->num_tx_context) { |
| dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__); |
| |
| ieee80211_stop_queues(priv->hw); |
| } |
| |
| return NULL; |
| } |
| |
| static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate) |
| { |
| return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2] |
| [rate % MAX_RATE]); |
| } |
| |
| static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type, |
| u32 frame_length, u16 rate, int need_ack) |
| { |
| u32 data_time, ack_time; |
| |
| data_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| frame_length, rate); |
| |
| if (pkt_type == PK_TYPE_11B) |
| ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, 14, |
| (u16)priv->top_cck_basic_rate); |
| else |
| ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, 14, |
| (u16)priv->top_ofdm_basic_rate); |
| |
| if (need_ack) |
| return data_time + priv->sifs + ack_time; |
| |
| return data_time; |
| } |
| |
| static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type, |
| u32 frame_length, u16 rate, int need_ack) |
| { |
| return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type, |
| frame_length, rate, need_ack)); |
| } |
| |
| static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, u8 rsv_type, |
| u8 pkt_type, u32 frame_length, |
| u16 current_rate) |
| { |
| u32 rrv_time, rts_time, cts_time, ack_time, data_time; |
| |
| rrv_time = 0; |
| rts_time = 0; |
| cts_time = 0; |
| ack_time = 0; |
| |
| data_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| frame_length, current_rate); |
| |
| if (rsv_type == 0) { |
| rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 20, priv->top_cck_basic_rate); |
| ack_time = vnt_get_frame_time(priv->preamble_type, |
| pkt_type, 14, |
| priv->top_cck_basic_rate); |
| cts_time = ack_time; |
| |
| } else if (rsv_type == 1) { |
| rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 20, priv->top_cck_basic_rate); |
| cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 14, priv->top_cck_basic_rate); |
| ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 14, priv->top_ofdm_basic_rate); |
| } else if (rsv_type == 2) { |
| rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 20, priv->top_ofdm_basic_rate); |
| ack_time = vnt_get_frame_time(priv->preamble_type, |
| pkt_type, 14, |
| priv->top_ofdm_basic_rate); |
| cts_time = ack_time; |
| |
| } else if (rsv_type == 3) { |
| cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 14, priv->top_cck_basic_rate); |
| ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 14, priv->top_ofdm_basic_rate); |
| |
| rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs; |
| |
| return cpu_to_le16((u16)rrv_time); |
| } |
| |
| rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs; |
| |
| return cpu_to_le16((u16)rrv_time); |
| } |
| |
| static __le16 vnt_get_duration_le(struct vnt_private *priv, u8 pkt_type, |
| int need_ack) |
| { |
| u32 ack_time = 0; |
| |
| if (need_ack) { |
| if (pkt_type == PK_TYPE_11B) |
| ack_time = vnt_get_frame_time(priv->preamble_type, |
| pkt_type, 14, |
| priv->top_cck_basic_rate); |
| else |
| ack_time = vnt_get_frame_time(priv->preamble_type, |
| pkt_type, 14, |
| priv->top_ofdm_basic_rate); |
| |
| return cpu_to_le16((u16)(priv->sifs + ack_time)); |
| } |
| |
| return 0; |
| } |
| |
| static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context, |
| u8 dur_type, u8 pkt_type, u16 rate) |
| { |
| struct vnt_private *priv = context->priv; |
| u32 cts_time = 0, dur_time = 0; |
| u32 frame_length = context->frame_len; |
| u8 need_ack = context->need_ack; |
| |
| switch (dur_type) { |
| case RTSDUR_BB: |
| case RTSDUR_BA: |
| case RTSDUR_BA_F0: |
| case RTSDUR_BA_F1: |
| cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 14, priv->top_cck_basic_rate); |
| dur_time = cts_time + 2 * priv->sifs + |
| vnt_get_rsvtime(priv, pkt_type, |
| frame_length, rate, need_ack); |
| break; |
| |
| case RTSDUR_AA: |
| case RTSDUR_AA_F0: |
| case RTSDUR_AA_F1: |
| cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, |
| 14, priv->top_ofdm_basic_rate); |
| dur_time = cts_time + 2 * priv->sifs + |
| vnt_get_rsvtime(priv, pkt_type, |
| frame_length, rate, need_ack); |
| break; |
| |
| case CTSDUR_BA: |
| case CTSDUR_BA_F0: |
| case CTSDUR_BA_F1: |
| dur_time = priv->sifs + vnt_get_rsvtime(priv, |
| pkt_type, frame_length, rate, need_ack); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return cpu_to_le16((u16)dur_time); |
| } |
| |
| static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context, |
| struct ieee80211_hdr *hdr) |
| { |
| u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head); |
| u8 *hdr_pos = (u8 *)hdr; |
| |
| tx_context->hdr = hdr; |
| if (!tx_context->hdr) |
| return 0; |
| |
| return (u16)(hdr_pos - head); |
| } |
| |
| static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context, |
| struct vnt_tx_datahead_g *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct ieee80211_hdr *hdr = |
| (struct ieee80211_hdr *)tx_context->skb->data; |
| u32 frame_len = tx_context->frame_len; |
| u16 rate = tx_context->tx_rate; |
| u8 need_ack = tx_context->need_ack; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a); |
| vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate, |
| PK_TYPE_11B, &buf->b); |
| |
| /* Get Duration and TimeStamp */ |
| if (ieee80211_is_nullfunc(hdr->frame_control)) { |
| buf->duration_a = hdr->duration_id; |
| buf->duration_b = hdr->duration_id; |
| } else { |
| buf->duration_a = vnt_get_duration_le(priv, |
| tx_context->pkt_type, need_ack); |
| buf->duration_b = vnt_get_duration_le(priv, |
| PK_TYPE_11B, need_ack); |
| } |
| |
| buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate); |
| buf->time_stamp_off_b = vnt_time_stamp_off(priv, |
| priv->top_cck_basic_rate); |
| |
| tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); |
| |
| return le16_to_cpu(buf->duration_a); |
| } |
| |
| static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context, |
| struct vnt_tx_datahead_g_fb *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| u32 frame_len = tx_context->frame_len; |
| u16 rate = tx_context->tx_rate; |
| u8 need_ack = tx_context->need_ack; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a); |
| |
| vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate, |
| PK_TYPE_11B, &buf->b); |
| |
| /* Get Duration and TimeStamp */ |
| buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type, |
| need_ack); |
| buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack); |
| |
| buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type, |
| need_ack); |
| buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type, |
| need_ack); |
| |
| buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate); |
| buf->time_stamp_off_b = vnt_time_stamp_off(priv, |
| priv->top_cck_basic_rate); |
| |
| tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); |
| |
| return le16_to_cpu(buf->duration_a); |
| } |
| |
| static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context, |
| struct vnt_tx_datahead_a_fb *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| u16 rate = tx_context->tx_rate; |
| u8 pkt_type = tx_context->pkt_type; |
| u8 need_ack = tx_context->need_ack; |
| u32 frame_len = tx_context->frame_len; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a); |
| /* Get Duration and TimeStampOff */ |
| buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack); |
| |
| buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack); |
| buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack); |
| |
| buf->time_stamp_off = vnt_time_stamp_off(priv, rate); |
| |
| tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); |
| |
| return le16_to_cpu(buf->duration); |
| } |
| |
| static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context, |
| struct vnt_tx_datahead_ab *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct ieee80211_hdr *hdr = |
| (struct ieee80211_hdr *)tx_context->skb->data; |
| u32 frame_len = tx_context->frame_len; |
| u16 rate = tx_context->tx_rate; |
| u8 need_ack = tx_context->need_ack; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, frame_len, rate, |
| tx_context->pkt_type, &buf->ab); |
| |
| /* Get Duration and TimeStampOff */ |
| if (ieee80211_is_nullfunc(hdr->frame_control)) { |
| buf->duration = hdr->duration_id; |
| } else { |
| buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type, |
| need_ack); |
| } |
| |
| buf->time_stamp_off = vnt_time_stamp_off(priv, rate); |
| |
| tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); |
| |
| return le16_to_cpu(buf->duration); |
| } |
| |
| static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context, |
| struct ieee80211_rts *rts, __le16 duration) |
| { |
| struct ieee80211_hdr *hdr = |
| (struct ieee80211_hdr *)tx_context->skb->data; |
| |
| rts->duration = duration; |
| rts->frame_control = |
| cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); |
| |
| ether_addr_copy(rts->ra, hdr->addr1); |
| ether_addr_copy(rts->ta, hdr->addr2); |
| |
| return 0; |
| } |
| |
| static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context, |
| struct vnt_rts_g *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| u16 rts_frame_len = 20; |
| u16 current_rate = tx_context->tx_rate; |
| |
| vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate, |
| PK_TYPE_11B, &buf->b); |
| vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, |
| tx_context->pkt_type, &buf->a); |
| |
| buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB, |
| PK_TYPE_11B, |
| priv->top_cck_basic_rate); |
| buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, |
| tx_context->pkt_type, |
| current_rate); |
| buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA, |
| tx_context->pkt_type, |
| current_rate); |
| |
| vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa); |
| |
| return vnt_rxtx_datahead_g(tx_context, &buf->data_head); |
| } |
| |
| static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context, |
| struct vnt_rts_g_fb *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| u16 current_rate = tx_context->tx_rate; |
| u16 rts_frame_len = 20; |
| |
| vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate, |
| PK_TYPE_11B, &buf->b); |
| vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, |
| tx_context->pkt_type, &buf->a); |
| |
| buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB, |
| PK_TYPE_11B, |
| priv->top_cck_basic_rate); |
| buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, |
| tx_context->pkt_type, |
| current_rate); |
| buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA, |
| tx_context->pkt_type, |
| current_rate); |
| |
| buf->rts_duration_ba_f0 = |
| vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0, |
| tx_context->pkt_type, |
| priv->tx_rate_fb0); |
| buf->rts_duration_aa_f0 = |
| vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0, |
| tx_context->pkt_type, |
| priv->tx_rate_fb0); |
| buf->rts_duration_ba_f1 = |
| vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1, |
| tx_context->pkt_type, |
| priv->tx_rate_fb1); |
| buf->rts_duration_aa_f1 = |
| vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1, |
| tx_context->pkt_type, |
| priv->tx_rate_fb1); |
| |
| vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa); |
| |
| return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head); |
| } |
| |
| static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context, |
| struct vnt_rts_ab *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| u16 current_rate = tx_context->tx_rate; |
| u16 rts_frame_len = 20; |
| |
| vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, |
| tx_context->pkt_type, &buf->ab); |
| |
| buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, |
| tx_context->pkt_type, |
| current_rate); |
| |
| vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration); |
| |
| return vnt_rxtx_datahead_ab(tx_context, &buf->data_head); |
| } |
| |
| static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context, |
| struct vnt_rts_a_fb *buf) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| u16 current_rate = tx_context->tx_rate; |
| u16 rts_frame_len = 20; |
| |
| vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, |
| tx_context->pkt_type, &buf->a); |
| |
| buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, |
| tx_context->pkt_type, |
| current_rate); |
| |
| buf->rts_duration_f0 = |
| vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0, |
| tx_context->pkt_type, |
| priv->tx_rate_fb0); |
| |
| buf->rts_duration_f1 = |
| vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1, |
| tx_context->pkt_type, |
| priv->tx_rate_fb1); |
| |
| vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration); |
| |
| return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head); |
| } |
| |
| static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context, |
| union vnt_tx_data_head *head) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct vnt_cts_fb *buf = &head->cts_g_fb; |
| u32 cts_frame_len = 14; |
| u16 current_rate = tx_context->tx_rate; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate, |
| PK_TYPE_11B, &buf->b); |
| |
| buf->duration_ba = |
| vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA, |
| tx_context->pkt_type, |
| current_rate); |
| /* Get CTSDuration_ba_f0 */ |
| buf->cts_duration_ba_f0 = |
| vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0, |
| tx_context->pkt_type, |
| priv->tx_rate_fb0); |
| /* Get CTSDuration_ba_f1 */ |
| buf->cts_duration_ba_f1 = |
| vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1, |
| tx_context->pkt_type, |
| priv->tx_rate_fb1); |
| /* Get CTS Frame body */ |
| buf->data.duration = buf->duration_ba; |
| buf->data.frame_control = |
| cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); |
| |
| ether_addr_copy(buf->data.ra, priv->current_net_addr); |
| |
| return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head); |
| } |
| |
| static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context, |
| union vnt_tx_data_head *head) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct vnt_cts *buf = &head->cts_g; |
| u32 cts_frame_len = 14; |
| u16 current_rate = tx_context->tx_rate; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate, |
| PK_TYPE_11B, &buf->b); |
| /* Get CTSDuration_ba */ |
| buf->duration_ba = |
| vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA, |
| tx_context->pkt_type, |
| current_rate); |
| /*Get CTS Frame body*/ |
| buf->data.duration = buf->duration_ba; |
| buf->data.frame_control = |
| cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); |
| |
| ether_addr_copy(buf->data.ra, priv->current_net_addr); |
| |
| return vnt_rxtx_datahead_g(tx_context, &buf->data_head); |
| } |
| |
| static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context, |
| union vnt_tx_head *tx_head, bool need_mic) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts; |
| union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head; |
| u32 frame_len = tx_context->frame_len; |
| u16 current_rate = tx_context->tx_rate; |
| u8 need_ack = tx_context->need_ack; |
| |
| buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2, |
| tx_context->pkt_type, frame_len, current_rate); |
| buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1, |
| tx_context->pkt_type, frame_len, current_rate); |
| buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0, |
| tx_context->pkt_type, frame_len, current_rate); |
| |
| buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type, |
| frame_len, current_rate, |
| need_ack); |
| buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len, |
| priv->top_cck_basic_rate, need_ack); |
| |
| if (need_mic) |
| head = &tx_head->tx_rts.tx.mic.head; |
| |
| if (tx_context->fb_option) |
| return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb); |
| |
| return vnt_rxtx_rts_g_head(tx_context, &head->rts_g); |
| } |
| |
| static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context, |
| union vnt_tx_head *tx_head, bool need_mic) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts; |
| union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head; |
| u32 frame_len = tx_context->frame_len; |
| u16 current_rate = tx_context->tx_rate; |
| u8 need_ack = tx_context->need_ack; |
| |
| buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type, |
| frame_len, current_rate, need_ack); |
| buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, |
| frame_len, priv->top_cck_basic_rate, need_ack); |
| |
| buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3, |
| tx_context->pkt_type, frame_len, current_rate); |
| |
| if (need_mic) |
| head = &tx_head->tx_cts.tx.mic.head; |
| |
| /* Fill CTS */ |
| if (tx_context->fb_option) |
| return vnt_fill_cts_fb_head(tx_context, head); |
| |
| return vnt_fill_cts_head(tx_context, head); |
| } |
| |
| static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context, |
| union vnt_tx_head *tx_head, bool need_rts, bool need_mic) |
| { |
| struct vnt_private *priv = tx_context->priv; |
| struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab; |
| union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head; |
| u32 frame_len = tx_context->frame_len; |
| u16 current_rate = tx_context->tx_rate; |
| u8 need_ack = tx_context->need_ack; |
| |
| buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type, |
| frame_len, current_rate, need_ack); |
| |
| if (need_mic) |
| head = &tx_head->tx_ab.tx.mic.head; |
| |
| if (need_rts) { |
| if (tx_context->pkt_type == PK_TYPE_11B) |
| buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0, |
| tx_context->pkt_type, frame_len, current_rate); |
| else /* PK_TYPE_11A */ |
| buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2, |
| tx_context->pkt_type, frame_len, current_rate); |
| |
| if (tx_context->fb_option && |
| tx_context->pkt_type == PK_TYPE_11A) |
| return vnt_rxtx_rts_a_fb_head(tx_context, |
| &head->rts_a_fb); |
| |
| return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab); |
| } |
| |
| if (tx_context->pkt_type == PK_TYPE_11A) |
| return vnt_rxtx_datahead_a_fb(tx_context, |
| &head->data_head_a_fb); |
| |
| return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab); |
| } |
| |
| static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context, |
| struct vnt_tx_buffer *tx_buffer, |
| struct vnt_mic_hdr **mic_hdr, u32 need_mic, |
| bool need_rts) |
| { |
| if (tx_context->pkt_type == PK_TYPE_11GB || |
| tx_context->pkt_type == PK_TYPE_11GA) { |
| if (need_rts) { |
| if (need_mic) |
| *mic_hdr = |
| &tx_buffer->tx_head.tx_rts.tx.mic.hdr; |
| |
| return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head, |
| need_mic); |
| } |
| |
| if (need_mic) |
| *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr; |
| |
| return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic); |
| } |
| |
| if (need_mic) |
| *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr; |
| |
| return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic); |
| } |
| |
| static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context, |
| u8 *key_buffer, struct ieee80211_key_conf *tx_key, |
| struct sk_buff *skb, u16 payload_len, |
| struct vnt_mic_hdr *mic_hdr) |
| { |
| struct ieee80211_hdr *hdr = tx_context->hdr; |
| u64 pn64; |
| u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb)); |
| |
| /* strip header and icv len from payload */ |
| payload_len -= ieee80211_get_hdrlen_from_skb(skb); |
| payload_len -= tx_key->icv_len; |
| |
| switch (tx_key->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| case WLAN_CIPHER_SUITE_WEP104: |
| memcpy(key_buffer, iv, 3); |
| memcpy(key_buffer + 3, tx_key->key, tx_key->keylen); |
| |
| if (tx_key->keylen == WLAN_KEY_LEN_WEP40) { |
| memcpy(key_buffer + 8, iv, 3); |
| memcpy(key_buffer + 11, |
| tx_key->key, WLAN_KEY_LEN_WEP40); |
| } |
| |
| break; |
| case WLAN_CIPHER_SUITE_TKIP: |
| ieee80211_get_tkip_p2k(tx_key, skb, key_buffer); |
| |
| break; |
| case WLAN_CIPHER_SUITE_CCMP: |
| |
| if (!mic_hdr) |
| return; |
| |
| mic_hdr->id = 0x59; |
| mic_hdr->payload_len = cpu_to_be16(payload_len); |
| ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2); |
| |
| pn64 = atomic64_read(&tx_key->tx_pn); |
| mic_hdr->ccmp_pn[5] = pn64; |
| mic_hdr->ccmp_pn[4] = pn64 >> 8; |
| mic_hdr->ccmp_pn[3] = pn64 >> 16; |
| mic_hdr->ccmp_pn[2] = pn64 >> 24; |
| mic_hdr->ccmp_pn[1] = pn64 >> 32; |
| mic_hdr->ccmp_pn[0] = pn64 >> 40; |
| |
| if (ieee80211_has_a4(hdr->frame_control)) |
| mic_hdr->hlen = cpu_to_be16(28); |
| else |
| mic_hdr->hlen = cpu_to_be16(22); |
| |
| ether_addr_copy(mic_hdr->addr1, hdr->addr1); |
| ether_addr_copy(mic_hdr->addr2, hdr->addr2); |
| ether_addr_copy(mic_hdr->addr3, hdr->addr3); |
| |
| mic_hdr->frame_control = cpu_to_le16( |
| le16_to_cpu(hdr->frame_control) & 0xc78f); |
| mic_hdr->seq_ctrl = cpu_to_le16( |
| le16_to_cpu(hdr->seq_ctrl) & 0xf); |
| |
| if (ieee80211_has_a4(hdr->frame_control)) |
| ether_addr_copy(mic_hdr->addr4, hdr->addr4); |
| |
| memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP); |
| |
| break; |
| default: |
| break; |
| } |
| } |
| |
| int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb) |
| { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_tx_rate *tx_rate = &info->control.rates[0]; |
| struct ieee80211_rate *rate; |
| struct ieee80211_key_conf *tx_key; |
| struct ieee80211_hdr *hdr; |
| struct vnt_mic_hdr *mic_hdr = NULL; |
| struct vnt_tx_buffer *tx_buffer; |
| struct vnt_tx_fifo_head *tx_buffer_head; |
| struct vnt_usb_send_context *tx_context; |
| unsigned long flags; |
| u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id; |
| u8 pkt_type, fb_option = AUTO_FB_NONE; |
| bool need_rts = false; |
| bool need_mic = false; |
| |
| hdr = (struct ieee80211_hdr *)(skb->data); |
| |
| rate = ieee80211_get_tx_rate(priv->hw, info); |
| |
| current_rate = rate->hw_value; |
| if (priv->current_rate != current_rate && |
| !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) { |
| priv->current_rate = current_rate; |
| vnt_schedule_command(priv, WLAN_CMD_SETPOWER); |
| } |
| |
| if (current_rate > RATE_11M) { |
| if (info->band == NL80211_BAND_5GHZ) { |
| pkt_type = PK_TYPE_11A; |
| } else { |
| if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
| if (priv->basic_rates & VNT_B_RATES) |
| pkt_type = PK_TYPE_11GB; |
| else |
| pkt_type = PK_TYPE_11GA; |
| } else { |
| pkt_type = PK_TYPE_11A; |
| } |
| } |
| } else { |
| pkt_type = PK_TYPE_11B; |
| } |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| tx_context = vnt_get_free_context(priv); |
| if (!tx_context) { |
| dev_dbg(&priv->usb->dev, "%s No free context\n", __func__); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| return -ENOMEM; |
| } |
| |
| tx_context->skb = skb; |
| tx_context->pkt_type = pkt_type; |
| tx_context->need_ack = false; |
| tx_context->frame_len = skb->len + 4; |
| tx_context->tx_rate = current_rate; |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| tx_buffer = (struct vnt_tx_buffer *)tx_context->data; |
| tx_buffer_head = &tx_buffer->fifo_head; |
| tx_body_size = skb->len; |
| |
| /*Set fifo controls */ |
| if (pkt_type == PK_TYPE_11A) |
| tx_buffer_head->fifo_ctl = 0; |
| else if (pkt_type == PK_TYPE_11B) |
| tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B); |
| else if (pkt_type == PK_TYPE_11GB) |
| tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB); |
| else if (pkt_type == PK_TYPE_11GA) |
| tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA); |
| |
| if (!ieee80211_is_data(hdr->frame_control)) { |
| tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT | |
| FIFOCTL_ISDMA0); |
| tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN); |
| |
| tx_buffer_head->time_stamp = |
| cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us); |
| } else { |
| tx_buffer_head->time_stamp = |
| cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us); |
| } |
| |
| if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { |
| tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK); |
| tx_context->need_ack = true; |
| } |
| |
| if (ieee80211_has_retry(hdr->frame_control)) |
| tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY); |
| |
| if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
| priv->preamble_type = PREAMBLE_SHORT; |
| else |
| priv->preamble_type = PREAMBLE_LONG; |
| |
| if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
| need_rts = true; |
| tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS); |
| } |
| |
| if (ieee80211_has_a4(hdr->frame_control)) |
| tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD); |
| |
| tx_buffer_head->frag_ctl = |
| cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10); |
| |
| if (info->control.hw_key) { |
| tx_key = info->control.hw_key; |
| switch (info->control.hw_key->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| case WLAN_CIPHER_SUITE_WEP104: |
| tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY); |
| break; |
| case WLAN_CIPHER_SUITE_TKIP: |
| tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP); |
| break; |
| case WLAN_CIPHER_SUITE_CCMP: |
| tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES); |
| need_mic = true; |
| default: |
| break; |
| } |
| tx_context->frame_len += tx_key->icv_len; |
| } |
| |
| tx_buffer_head->current_rate = cpu_to_le16(current_rate); |
| |
| /* legacy rates TODO use ieee80211_tx_rate */ |
| if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) { |
| if (priv->auto_fb_ctrl == AUTO_FB_0) { |
| tx_buffer_head->fifo_ctl |= |
| cpu_to_le16(FIFOCTL_AUTO_FB_0); |
| |
| priv->tx_rate_fb0 = |
| vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M]; |
| priv->tx_rate_fb1 = |
| vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M]; |
| |
| fb_option = AUTO_FB_0; |
| } else if (priv->auto_fb_ctrl == AUTO_FB_1) { |
| tx_buffer_head->fifo_ctl |= |
| cpu_to_le16(FIFOCTL_AUTO_FB_1); |
| |
| priv->tx_rate_fb0 = |
| vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M]; |
| priv->tx_rate_fb1 = |
| vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M]; |
| |
| fb_option = AUTO_FB_1; |
| } |
| } |
| |
| tx_context->fb_option = fb_option; |
| |
| duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr, |
| need_mic, need_rts); |
| |
| tx_header_size = tx_context->tx_hdr_size; |
| if (!tx_header_size) { |
| tx_context->in_use = false; |
| return -ENOMEM; |
| } |
| |
| tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG); |
| |
| tx_bytes = tx_header_size + tx_body_size; |
| |
| memcpy(tx_context->hdr, skb->data, tx_body_size); |
| |
| hdr->duration_id = cpu_to_le16(duration_id); |
| |
| if (info->control.hw_key) { |
| tx_key = info->control.hw_key; |
| if (tx_key->keylen > 0) |
| vnt_fill_txkey(tx_context, tx_buffer_head->tx_key, |
| tx_key, skb, tx_body_size, mic_hdr); |
| } |
| |
| priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) & |
| IEEE80211_SCTL_SEQ) >> 4; |
| |
| tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes); |
| tx_buffer->pkt_no = tx_context->pkt_no; |
| tx_buffer->type = 0x00; |
| |
| tx_bytes += 4; |
| |
| tx_context->type = CONTEXT_DATA_PACKET; |
| tx_context->buf_len = tx_bytes; |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) { |
| spin_unlock_irqrestore(&priv->lock, flags); |
| return -EIO; |
| } |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| return 0; |
| } |
| |
| static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb) |
| { |
| struct vnt_beacon_buffer *beacon_buffer; |
| struct vnt_tx_short_buf_head *short_head; |
| struct ieee80211_tx_info *info; |
| struct vnt_usb_send_context *context; |
| struct ieee80211_mgmt *mgmt_hdr; |
| unsigned long flags; |
| u32 frame_size = skb->len + 4; |
| u16 current_rate, count; |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| context = vnt_get_free_context(priv); |
| if (!context) { |
| dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| return -ENOMEM; |
| } |
| |
| context->skb = skb; |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0]; |
| short_head = &beacon_buffer->short_head; |
| |
| if (priv->bb_type == BB_TYPE_11A) { |
| current_rate = RATE_6M; |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, frame_size, current_rate, |
| PK_TYPE_11A, &short_head->ab); |
| |
| /* Get Duration and TimeStampOff */ |
| short_head->duration = vnt_get_duration_le(priv, |
| PK_TYPE_11A, false); |
| short_head->time_stamp_off = |
| vnt_time_stamp_off(priv, current_rate); |
| } else { |
| current_rate = RATE_1M; |
| short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B); |
| |
| /* Get SignalField,ServiceField,Length */ |
| vnt_get_phy_field(priv, frame_size, current_rate, |
| PK_TYPE_11B, &short_head->ab); |
| |
| /* Get Duration and TimeStampOff */ |
| short_head->duration = vnt_get_duration_le(priv, |
| PK_TYPE_11B, false); |
| short_head->time_stamp_off = |
| vnt_time_stamp_off(priv, current_rate); |
| } |
| |
| /* Generate Beacon Header */ |
| mgmt_hdr = &beacon_buffer->mgmt_hdr; |
| memcpy(mgmt_hdr, skb->data, skb->len); |
| |
| /* time stamp always 0 */ |
| mgmt_hdr->u.beacon.timestamp = 0; |
| |
| info = IEEE80211_SKB_CB(skb); |
| if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr; |
| |
| hdr->duration_id = 0; |
| hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4); |
| } |
| |
| priv->seq_counter++; |
| if (priv->seq_counter > 0x0fff) |
| priv->seq_counter = 0; |
| |
| count = sizeof(struct vnt_tx_short_buf_head) + skb->len; |
| |
| beacon_buffer->tx_byte_count = cpu_to_le16(count); |
| beacon_buffer->pkt_no = context->pkt_no; |
| beacon_buffer->type = 0x01; |
| |
| context->type = CONTEXT_BEACON_PACKET; |
| context->buf_len = count + 4; /* USB header */ |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| if (vnt_tx_context(priv, context) != STATUS_PENDING) |
| ieee80211_free_txskb(priv->hw, context->skb); |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| return 0; |
| } |
| |
| int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif) |
| { |
| struct sk_buff *beacon; |
| |
| beacon = ieee80211_beacon_get(priv->hw, vif); |
| if (!beacon) |
| return -ENOMEM; |
| |
| if (vnt_beacon_xmit(priv, beacon)) { |
| ieee80211_free_txskb(priv->hw, beacon); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif, |
| struct ieee80211_bss_conf *conf) |
| { |
| vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX); |
| |
| vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN); |
| |
| vnt_mac_set_beacon_interval(priv, conf->beacon_int); |
| |
| vnt_clear_current_tsf(priv); |
| |
| vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN); |
| |
| vnt_reset_next_tbtt(priv, conf->beacon_int); |
| |
| return vnt_beacon_make(priv, vif); |
| } |