1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* carlu - userspace testing utility for ar9170 devices
*
* xmit - related functions
*
* Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "libusb.h"
#include "carlu.h"
#include "debug.h"
#include "frame.h"
#include "usb.h"
#include "ieee80211.h"
#include "wlan.h"
struct frame *carlu_alloc_frame(struct carlu *ar, unsigned int size)
{
struct frame *tmp;
unsigned int total_len;
total_len = ar->extra_headroom + sizeof(struct _carl9170_tx_superframe) + size;
tmp = frame_alloc(total_len);
if (!tmp)
return NULL;
frame_reserve(tmp, sizeof(struct _carl9170_tx_superframe) + ar->extra_headroom);
tmp->queue = 2;
return tmp;
}
static int carlu_alloc_dev_mem(struct carlu *ar,
struct frame *frame)
{
struct _carl9170_tx_superframe *txp = (void *)frame->data;
unsigned int len, chunks;
len = roundup(frame->len, ar->dma_chunk_size);
chunks = len / ar->dma_chunk_size;
SDL_mutexP(ar->mem_lock);
if (ar->tx_pending >= ar->dma_chunks ||
ar->used_dma_chunks + chunks >= ar->dma_chunks) {
SDL_mutexV(ar->mem_lock);
return -ENOSPC;
}
ar->used_dma_chunks += chunks;
ar->tx_pending++;
txp->s.cookie = ar->cookie++;
SDL_mutexV(ar->mem_lock);
return 0;
}
static void carlu_free_dev_mem(struct carlu *ar,
struct frame *frame)
{
struct _carl9170_tx_superframe *txp = (void *)frame->data;
unsigned int len, chunks;
len = roundup(frame->len, ar->dma_chunk_size);
chunks = len / ar->dma_chunk_size;
SDL_mutexP(ar->mem_lock);
ar->used_dma_chunks -= chunks;
ar->tx_pending--;
SDL_mutexV(ar->mem_lock);
}
void carlu_free_frame(struct carlu *ar __unused,
struct frame *frame)
{
frame_free(frame);
}
static struct frame *carlu_find_frame(struct carlu *ar,
unsigned int queue, uint8_t cookie)
{
struct frame *frame = NULL;
BUG_ON(queue >= __AR9170_NUM_TXQ);
BUG_ON(SDL_mutexP(ar->tx_sent_queue[queue].lock) != 0);
FRAME_WALK(frame, &ar->tx_sent_queue[queue]) {
struct _carl9170_tx_superframe *super;
super = (void *) frame->data;
if (super->s.cookie == cookie) {
__frame_unlink(&ar->tx_sent_queue[queue], frame);
SDL_mutexV(ar->tx_sent_queue[queue].lock);
return frame;
}
}
SDL_mutexV(ar->tx_sent_queue[queue].lock);
return NULL;
}
static void carlu_tx_fb_cb(struct carlu *ar,
struct frame *frame)
{
if (ar->tx_fb_cb)
ar->tx_fb_cb(ar, frame);
else
carlu_free_frame(ar, frame);
}
void carlu_tx_feedback(struct carlu *ar,
struct carl9170_rsp *cmd)
{
unsigned int i, n, k, q;
struct frame *frame;
struct carlu_tx_info *tx_info;
n = cmd->hdr.ext;
for (i = 0; i < n; i++) {
q = (cmd->_tx_status[i].info >> CARL9170_TX_STATUS_QUEUE_S) &
CARL9170_TX_STATUS_QUEUE;
frame = carlu_find_frame(ar, q, cmd->_tx_status[i].cookie);
if (frame) {
carlu_free_dev_mem(ar, frame);
tx_info = get_tx_info(frame);
k = (cmd->_tx_status[i].info >> CARL9170_TX_STATUS_RIX)
& CARL9170_TX_STATUS_RIX_S;
tx_info->rates[k].cnt = (cmd->_tx_status[i].info >>
CARL9170_TX_STATUS_TRIES_S) &
CARL9170_TX_STATUS_TRIES;
for (k++; k < CARL9170_TX_MAX_RATES; k++) {
tx_info->rates[k].rix = -1;
tx_info->rates[k].cnt = -1;
}
carlu_tx_fb_cb(ar, frame);
} else {
err("Found no frame for cookie %d.\n",
cmd->_tx_status[i].cookie);
}
}
}
int carlu_tx(struct carlu *ar, struct frame *frame)
{
struct _carl9170_tx_superframe *txp;
unsigned int len, queue;
int cookie, err;
len = frame->len;
txp = (void *) frame_push(frame, sizeof(struct _carl9170_tx_superframe));
if (txp->s.rix)
goto err_out;
err = carlu_alloc_dev_mem(ar, frame);
if (err)
goto err_out;
txp->s.len = cpu_to_le16(frame->len);
queue = (frame->queue % __AR9170_NUM_TXQ);
SET_VAL(CARL9170_TX_SUPER_MISC_QUEUE, txp->s.misc, queue);
txp->f.length = len + FCS_LEN; /* + I(C)V_LEN */
txp->f.mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
AR9170_TX_MAC_BACKOFF);
txp->f.mac_control |= cpu_to_le16(queue << AR9170_TX_MAC_QOS_S);
txp->f.phy_control = cpu_to_le32(AR9170_TX_PHY_MOD_CCK | AR9170_TX_PHY_BW_20MHZ |
((17 * 2) << AR9170_TX_PHY_TX_PWR_S) |
(AR9170_TX_PHY_TXCHAIN_1 << AR9170_TX_PHY_TXCHAIN_S) |
(11 << AR9170_TX_PHY_MCS_S));
frame_queue_tail(&ar->tx_sent_queue[queue], frame);
carlusb_tx(ar, frame);
return 0;
err_out:
frame_pull(frame, sizeof(struct _carl9170_tx_superframe));
return err;
}
|
