Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 2 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Filename: qos.c |
| 4 | * Version: 1.0 |
| 5 | * Description: IrLAP QoS parameter negotiation |
| 6 | * Status: Stable |
| 7 | * Author: Dag Brattli <dagb@cs.uit.no> |
| 8 | * Created at: Tue Sep 9 00:00:26 1997 |
| 9 | * Modified at: Sun Jan 30 14:29:16 2000 |
| 10 | * Modified by: Dag Brattli <dagb@cs.uit.no> |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 11 | * |
| 12 | * Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * All Rights Reserved. |
| 14 | * Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com> |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 15 | * |
| 16 | * This program is free software; you can redistribute it and/or |
| 17 | * modify it under the terms of the GNU General Public License as |
| 18 | * published by the Free Software Foundation; either version 2 of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * the License, or (at your option) any later version. |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 20 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | * GNU General Public License for more details. |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 25 | * |
| 26 | * You should have received a copy of the GNU General Public License |
| 27 | * along with this program; if not, write to the Free Software |
| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | * MA 02111-1307 USA |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 30 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | ********************************************************************/ |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/byteorder.h> |
| 34 | |
| 35 | #include <net/irda/irda.h> |
| 36 | #include <net/irda/parameters.h> |
| 37 | #include <net/irda/qos.h> |
| 38 | #include <net/irda/irlap.h> |
Adrian Bunk | 506e7be | 2005-09-05 18:08:11 -0700 | [diff] [blame] | 39 | #include <net/irda/irlap_frame.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * Maximum values of the baud rate we negociate with the other end. |
| 43 | * Most often, you don't have to change that, because Linux-IrDA will |
| 44 | * use the maximum offered by the link layer, which usually works fine. |
| 45 | * In some very rare cases, you may want to limit it to lower speeds... |
| 46 | */ |
| 47 | int sysctl_max_baud_rate = 16000000; |
| 48 | /* |
| 49 | * Maximum value of the lap disconnect timer we negociate with the other end. |
| 50 | * Most often, the value below represent the best compromise, but some user |
| 51 | * may want to keep the LAP alive longuer or shorter in case of link failure. |
| 52 | * Remember that the threshold time (early warning) is fixed to 3s... |
| 53 | */ |
| 54 | int sysctl_max_noreply_time = 12; |
| 55 | /* |
| 56 | * Minimum turn time to be applied before transmitting to the peer. |
| 57 | * Nonzero values (usec) are used as lower limit to the per-connection |
| 58 | * mtt value which was announced by the other end during negotiation. |
| 59 | * Might be helpful if the peer device provides too short mtt. |
| 60 | * Default is 10us which means using the unmodified value given by the |
| 61 | * peer except if it's 0 (0 is likely a bug in the other stack). |
| 62 | */ |
| 63 | unsigned sysctl_min_tx_turn_time = 10; |
| 64 | /* |
| 65 | * Maximum data size to be used in transmission in payload of LAP frame. |
| 66 | * There is a bit of confusion in the IrDA spec : |
| 67 | * The LAP spec defines the payload of a LAP frame (I field) to be |
| 68 | * 2048 bytes max (IrLAP 1.1, chapt 6.6.5, p40). |
| 69 | * On the other hand, the PHY mention frames of 2048 bytes max (IrPHY |
| 70 | * 1.2, chapt 5.3.2.1, p41). But, this number includes the LAP header |
| 71 | * (2 bytes), and CRC (32 bits at 4 Mb/s). So, for the I field (LAP |
| 72 | * payload), that's only 2042 bytes. Oups ! |
| 73 | * My nsc-ircc hardware has troubles receiving 2048 bytes frames at 4 Mb/s, |
| 74 | * so adjust to 2042... I don't know if this bug applies only for 2048 |
| 75 | * bytes frames or all negotiated frame sizes, but you can use the sysctl |
| 76 | * to play with this value anyway. |
| 77 | * Jean II */ |
| 78 | unsigned sysctl_max_tx_data_size = 2042; |
| 79 | /* |
| 80 | * Maximum transmit window, i.e. number of LAP frames between turn-around. |
| 81 | * This allow to override what the peer told us. Some peers are buggy and |
| 82 | * don't always support what they tell us. |
| 83 | * Jean II */ |
| 84 | unsigned sysctl_max_tx_window = 7; |
| 85 | |
| 86 | static int irlap_param_baud_rate(void *instance, irda_param_t *param, int get); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 87 | static int irlap_param_link_disconnect(void *instance, irda_param_t *parm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | int get); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 89 | static int irlap_param_max_turn_time(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | int get); |
| 91 | static int irlap_param_data_size(void *instance, irda_param_t *param, int get); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 92 | static int irlap_param_window_size(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | int get); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 94 | static int irlap_param_additional_bofs(void *instance, irda_param_t *parm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | int get); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 96 | static int irlap_param_min_turn_time(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | int get); |
| 98 | |
| 99 | #ifndef CONFIG_IRDA_DYNAMIC_WINDOW |
| 100 | static __u32 irlap_requested_line_capacity(struct qos_info *qos); |
| 101 | #endif |
| 102 | |
| 103 | static __u32 min_turn_times[] = { 10000, 5000, 1000, 500, 100, 50, 10, 0 }; /* us */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 104 | static __u32 baud_rates[] = { 2400, 9600, 19200, 38400, 57600, 115200, 576000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | 1152000, 4000000, 16000000 }; /* bps */ |
| 106 | static __u32 data_sizes[] = { 64, 128, 256, 512, 1024, 2048 }; /* bytes */ |
| 107 | static __u32 add_bofs[] = { 48, 24, 12, 5, 3, 2, 1, 0 }; /* bytes */ |
| 108 | static __u32 max_turn_times[] = { 500, 250, 100, 50 }; /* ms */ |
| 109 | static __u32 link_disc_times[] = { 3, 8, 12, 16, 20, 25, 30, 40 }; /* secs */ |
| 110 | |
| 111 | static __u32 max_line_capacities[10][4] = { |
| 112 | /* 500 ms 250 ms 100 ms 50 ms (max turn time) */ |
| 113 | { 100, 0, 0, 0 }, /* 2400 bps */ |
| 114 | { 400, 0, 0, 0 }, /* 9600 bps */ |
| 115 | { 800, 0, 0, 0 }, /* 19200 bps */ |
| 116 | { 1600, 0, 0, 0 }, /* 38400 bps */ |
| 117 | { 2360, 0, 0, 0 }, /* 57600 bps */ |
| 118 | { 4800, 2400, 960, 480 }, /* 115200 bps */ |
| 119 | { 28800, 11520, 5760, 2880 }, /* 576000 bps */ |
| 120 | { 57600, 28800, 11520, 5760 }, /* 1152000 bps */ |
| 121 | { 200000, 100000, 40000, 20000 }, /* 4000000 bps */ |
| 122 | { 800000, 400000, 160000, 80000 }, /* 16000000 bps */ |
| 123 | }; |
| 124 | |
| 125 | static pi_minor_info_t pi_minor_call_table_type_0[] = { |
| 126 | { NULL, 0 }, |
| 127 | /* 01 */{ irlap_param_baud_rate, PV_INTEGER | PV_LITTLE_ENDIAN }, |
| 128 | { NULL, 0 }, |
| 129 | { NULL, 0 }, |
| 130 | { NULL, 0 }, |
| 131 | { NULL, 0 }, |
| 132 | { NULL, 0 }, |
| 133 | { NULL, 0 }, |
| 134 | /* 08 */{ irlap_param_link_disconnect, PV_INT_8_BITS } |
| 135 | }; |
| 136 | |
| 137 | static pi_minor_info_t pi_minor_call_table_type_1[] = { |
| 138 | { NULL, 0 }, |
| 139 | { NULL, 0 }, |
| 140 | /* 82 */{ irlap_param_max_turn_time, PV_INT_8_BITS }, |
| 141 | /* 83 */{ irlap_param_data_size, PV_INT_8_BITS }, |
| 142 | /* 84 */{ irlap_param_window_size, PV_INT_8_BITS }, |
| 143 | /* 85 */{ irlap_param_additional_bofs, PV_INT_8_BITS }, |
| 144 | /* 86 */{ irlap_param_min_turn_time, PV_INT_8_BITS }, |
| 145 | }; |
| 146 | |
| 147 | static pi_major_info_t pi_major_call_table[] = { |
| 148 | { pi_minor_call_table_type_0, 9 }, |
| 149 | { pi_minor_call_table_type_1, 7 }, |
| 150 | }; |
| 151 | |
| 152 | static pi_param_info_t irlap_param_info = { pi_major_call_table, 2, 0x7f, 7 }; |
| 153 | |
| 154 | /* ---------------------- LOCAL SUBROUTINES ---------------------- */ |
| 155 | /* Note : we start with a bunch of local subroutines. |
| 156 | * As the compiler is "one pass", this is the only way to get them to |
| 157 | * inline properly... |
| 158 | * Jean II |
| 159 | */ |
| 160 | /* |
| 161 | * Function value_index (value, array, size) |
| 162 | * |
| 163 | * Returns the index to the value in the specified array |
| 164 | */ |
| 165 | static inline int value_index(__u32 value, __u32 *array, int size) |
| 166 | { |
| 167 | int i; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | for (i=0; i < size; i++) |
| 170 | if (array[i] == value) |
| 171 | break; |
| 172 | return i; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Function index_value (index, array) |
| 177 | * |
| 178 | * Returns value to index in array, easy! |
| 179 | * |
| 180 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 181 | static inline __u32 index_value(int index, __u32 *array) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | { |
| 183 | return array[index]; |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * Function msb_index (word) |
| 188 | * |
| 189 | * Returns index to most significant bit (MSB) in word |
| 190 | * |
| 191 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 192 | static int msb_index (__u16 word) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | { |
| 194 | __u16 msb = 0x8000; |
| 195 | int index = 15; /* Current MSB */ |
| 196 | |
| 197 | /* Check for buggy peers. |
| 198 | * Note : there is a small probability that it could be us, but I |
| 199 | * would expect driver authors to catch that pretty early and be |
| 200 | * able to check precisely what's going on. If a end user sees this, |
| 201 | * it's very likely the peer. - Jean II */ |
| 202 | if (word == 0) { |
| 203 | IRDA_WARNING("%s(), Detected buggy peer, adjust null PV to 0x1!\n", |
| 204 | __FUNCTION__); |
| 205 | /* The only safe choice (we don't know the array size) */ |
| 206 | word = 0x1; |
| 207 | } |
| 208 | |
| 209 | while (msb) { |
| 210 | if (word & msb) |
| 211 | break; /* Found it! */ |
| 212 | msb >>=1; |
| 213 | index--; |
| 214 | } |
| 215 | return index; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Function value_lower_bits (value, array) |
| 220 | * |
| 221 | * Returns a bit field marking all possibility lower than value. |
| 222 | */ |
| 223 | static inline int value_lower_bits(__u32 value, __u32 *array, int size, __u16 *field) |
| 224 | { |
| 225 | int i; |
| 226 | __u16 mask = 0x1; |
| 227 | __u16 result = 0x0; |
| 228 | |
| 229 | for (i=0; i < size; i++) { |
| 230 | /* Add the current value to the bit field, shift mask */ |
| 231 | result |= mask; |
| 232 | mask <<= 1; |
| 233 | /* Finished ? */ |
| 234 | if (array[i] >= value) |
| 235 | break; |
| 236 | } |
| 237 | /* Send back a valid index */ |
| 238 | if(i >= size) |
| 239 | i = size - 1; /* Last item */ |
| 240 | *field = result; |
| 241 | return i; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Function value_highest_bit (value, array) |
| 246 | * |
| 247 | * Returns a bit field marking the highest possibility lower than value. |
| 248 | */ |
| 249 | static inline int value_highest_bit(__u32 value, __u32 *array, int size, __u16 *field) |
| 250 | { |
| 251 | int i; |
| 252 | __u16 mask = 0x1; |
| 253 | __u16 result = 0x0; |
| 254 | |
| 255 | for (i=0; i < size; i++) { |
| 256 | /* Finished ? */ |
| 257 | if (array[i] <= value) |
| 258 | break; |
| 259 | /* Shift mask */ |
| 260 | mask <<= 1; |
| 261 | } |
| 262 | /* Set the current value to the bit field */ |
| 263 | result |= mask; |
| 264 | /* Send back a valid index */ |
| 265 | if(i >= size) |
| 266 | i = size - 1; /* Last item */ |
| 267 | *field = result; |
| 268 | return i; |
| 269 | } |
| 270 | |
| 271 | /* -------------------------- MAIN CALLS -------------------------- */ |
| 272 | |
| 273 | /* |
| 274 | * Function irda_qos_compute_intersection (qos, new) |
| 275 | * |
| 276 | * Compute the intersection of the old QoS capabilities with new ones |
| 277 | * |
| 278 | */ |
| 279 | void irda_qos_compute_intersection(struct qos_info *qos, struct qos_info *new) |
| 280 | { |
| 281 | IRDA_ASSERT(qos != NULL, return;); |
| 282 | IRDA_ASSERT(new != NULL, return;); |
| 283 | |
| 284 | /* Apply */ |
| 285 | qos->baud_rate.bits &= new->baud_rate.bits; |
| 286 | qos->window_size.bits &= new->window_size.bits; |
| 287 | qos->min_turn_time.bits &= new->min_turn_time.bits; |
| 288 | qos->max_turn_time.bits &= new->max_turn_time.bits; |
| 289 | qos->data_size.bits &= new->data_size.bits; |
| 290 | qos->link_disc_time.bits &= new->link_disc_time.bits; |
| 291 | qos->additional_bofs.bits &= new->additional_bofs.bits; |
| 292 | |
| 293 | irda_qos_bits_to_value(qos); |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * Function irda_init_max_qos_capabilies (qos) |
| 298 | * |
| 299 | * The purpose of this function is for layers and drivers to be able to |
| 300 | * set the maximum QoS possible and then "and in" their own limitations |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 301 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | */ |
| 303 | void irda_init_max_qos_capabilies(struct qos_info *qos) |
| 304 | { |
| 305 | int i; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 306 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | * These are the maximum supported values as specified on pages |
| 308 | * 39-43 in IrLAP |
| 309 | */ |
| 310 | |
| 311 | /* Use sysctl to set some configurable values... */ |
| 312 | /* Set configured max speed */ |
| 313 | i = value_lower_bits(sysctl_max_baud_rate, baud_rates, 10, |
| 314 | &qos->baud_rate.bits); |
| 315 | sysctl_max_baud_rate = index_value(i, baud_rates); |
| 316 | |
| 317 | /* Set configured max disc time */ |
| 318 | i = value_lower_bits(sysctl_max_noreply_time, link_disc_times, 8, |
| 319 | &qos->link_disc_time.bits); |
| 320 | sysctl_max_noreply_time = index_value(i, link_disc_times); |
| 321 | |
| 322 | /* LSB is first byte, MSB is second byte */ |
| 323 | qos->baud_rate.bits &= 0x03ff; |
| 324 | |
| 325 | qos->window_size.bits = 0x7f; |
| 326 | qos->min_turn_time.bits = 0xff; |
| 327 | qos->max_turn_time.bits = 0x0f; |
| 328 | qos->data_size.bits = 0x3f; |
| 329 | qos->link_disc_time.bits &= 0xff; |
| 330 | qos->additional_bofs.bits = 0xff; |
| 331 | } |
| 332 | EXPORT_SYMBOL(irda_init_max_qos_capabilies); |
| 333 | |
| 334 | /* |
| 335 | * Function irlap_adjust_qos_settings (qos) |
| 336 | * |
| 337 | * Adjust QoS settings in case some values are not possible to use because |
| 338 | * of other settings |
| 339 | */ |
| 340 | static void irlap_adjust_qos_settings(struct qos_info *qos) |
| 341 | { |
| 342 | __u32 line_capacity; |
| 343 | int index; |
| 344 | |
| 345 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 346 | |
| 347 | /* |
| 348 | * Make sure the mintt is sensible. |
| 349 | * Main culprit : Ericsson T39. - Jean II |
| 350 | */ |
| 351 | if (sysctl_min_tx_turn_time > qos->min_turn_time.value) { |
| 352 | int i; |
| 353 | |
| 354 | IRDA_WARNING("%s(), Detected buggy peer, adjust mtt to %dus!\n", |
| 355 | __FUNCTION__, sysctl_min_tx_turn_time); |
| 356 | |
| 357 | /* We don't really need bits, but easier this way */ |
| 358 | i = value_highest_bit(sysctl_min_tx_turn_time, min_turn_times, |
| 359 | 8, &qos->min_turn_time.bits); |
| 360 | sysctl_min_tx_turn_time = index_value(i, min_turn_times); |
| 361 | qos->min_turn_time.value = sysctl_min_tx_turn_time; |
| 362 | } |
| 363 | |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 364 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | * Not allowed to use a max turn time less than 500 ms if the baudrate |
| 366 | * is less than 115200 |
| 367 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 368 | if ((qos->baud_rate.value < 115200) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | (qos->max_turn_time.value < 500)) |
| 370 | { |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 371 | IRDA_DEBUG(0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | "%s(), adjusting max turn time from %d to 500 ms\n", |
| 373 | __FUNCTION__, qos->max_turn_time.value); |
| 374 | qos->max_turn_time.value = 500; |
| 375 | } |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | /* |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 378 | * The data size must be adjusted according to the baud rate and max |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | * turn time |
| 380 | */ |
| 381 | index = value_index(qos->data_size.value, data_sizes, 6); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 382 | line_capacity = irlap_max_line_capacity(qos->baud_rate.value, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | qos->max_turn_time.value); |
| 384 | |
| 385 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW |
| 386 | while ((qos->data_size.value > line_capacity) && (index > 0)) { |
| 387 | qos->data_size.value = data_sizes[index--]; |
| 388 | IRDA_DEBUG(2, "%s(), reducing data size to %d\n", |
| 389 | __FUNCTION__, qos->data_size.value); |
| 390 | } |
| 391 | #else /* Use method described in section 6.6.11 of IrLAP */ |
| 392 | while (irlap_requested_line_capacity(qos) > line_capacity) { |
| 393 | IRDA_ASSERT(index != 0, return;); |
| 394 | |
| 395 | /* Must be able to send at least one frame */ |
| 396 | if (qos->window_size.value > 1) { |
| 397 | qos->window_size.value--; |
| 398 | IRDA_DEBUG(2, "%s(), reducing window size to %d\n", |
| 399 | __FUNCTION__, qos->window_size.value); |
| 400 | } else if (index > 1) { |
| 401 | qos->data_size.value = data_sizes[index--]; |
| 402 | IRDA_DEBUG(2, "%s(), reducing data size to %d\n", |
| 403 | __FUNCTION__, qos->data_size.value); |
| 404 | } else { |
| 405 | IRDA_WARNING("%s(), nothing more we can do!\n", |
| 406 | __FUNCTION__); |
| 407 | } |
| 408 | } |
| 409 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ |
| 410 | /* |
| 411 | * Fix tx data size according to user limits - Jean II |
| 412 | */ |
| 413 | if (qos->data_size.value > sysctl_max_tx_data_size) |
| 414 | /* Allow non discrete adjustement to avoid loosing capacity */ |
| 415 | qos->data_size.value = sysctl_max_tx_data_size; |
| 416 | /* |
| 417 | * Override Tx window if user request it. - Jean II |
| 418 | */ |
| 419 | if (qos->window_size.value > sysctl_max_tx_window) |
| 420 | qos->window_size.value = sysctl_max_tx_window; |
| 421 | } |
| 422 | |
| 423 | /* |
| 424 | * Function irlap_negotiate (qos_device, qos_session, skb) |
| 425 | * |
| 426 | * Negotiate QoS values, not really that much negotiation :-) |
| 427 | * We just set the QoS capabilities for the peer station |
| 428 | * |
| 429 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 430 | int irlap_qos_negotiate(struct irlap_cb *self, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | { |
| 432 | int ret; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 433 | |
| 434 | ret = irda_param_extract_all(self, skb->data, skb->len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | &irlap_param_info); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | /* Convert the negotiated bits to values */ |
| 438 | irda_qos_bits_to_value(&self->qos_tx); |
| 439 | irda_qos_bits_to_value(&self->qos_rx); |
| 440 | |
| 441 | irlap_adjust_qos_settings(&self->qos_tx); |
| 442 | |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 443 | IRDA_DEBUG(2, "Setting BAUD_RATE to %d bps.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | self->qos_tx.baud_rate.value); |
| 445 | IRDA_DEBUG(2, "Setting DATA_SIZE to %d bytes\n", |
| 446 | self->qos_tx.data_size.value); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 447 | IRDA_DEBUG(2, "Setting WINDOW_SIZE to %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | self->qos_tx.window_size.value); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 449 | IRDA_DEBUG(2, "Setting XBOFS to %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | self->qos_tx.additional_bofs.value); |
| 451 | IRDA_DEBUG(2, "Setting MAX_TURN_TIME to %d ms.\n", |
| 452 | self->qos_tx.max_turn_time.value); |
| 453 | IRDA_DEBUG(2, "Setting MIN_TURN_TIME to %d usecs.\n", |
| 454 | self->qos_tx.min_turn_time.value); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 455 | IRDA_DEBUG(2, "Setting LINK_DISC to %d secs.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | self->qos_tx.link_disc_time.value); |
| 457 | return ret; |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Function irlap_insert_negotiation_params (qos, fp) |
| 462 | * |
| 463 | * Insert QoS negotiaion pararameters into frame |
| 464 | * |
| 465 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 466 | int irlap_insert_qos_negotiation_params(struct irlap_cb *self, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | struct sk_buff *skb) |
| 468 | { |
| 469 | int ret; |
| 470 | |
| 471 | /* Insert data rate */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 472 | ret = irda_param_insert(self, PI_BAUD_RATE, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | skb_tailroom(skb), &irlap_param_info); |
| 474 | if (ret < 0) |
| 475 | return ret; |
| 476 | skb_put(skb, ret); |
| 477 | |
| 478 | /* Insert max turnaround time */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 479 | ret = irda_param_insert(self, PI_MAX_TURN_TIME, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | skb_tailroom(skb), &irlap_param_info); |
| 481 | if (ret < 0) |
| 482 | return ret; |
| 483 | skb_put(skb, ret); |
| 484 | |
| 485 | /* Insert data size */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 486 | ret = irda_param_insert(self, PI_DATA_SIZE, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | skb_tailroom(skb), &irlap_param_info); |
| 488 | if (ret < 0) |
| 489 | return ret; |
| 490 | skb_put(skb, ret); |
| 491 | |
| 492 | /* Insert window size */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 493 | ret = irda_param_insert(self, PI_WINDOW_SIZE, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | skb_tailroom(skb), &irlap_param_info); |
| 495 | if (ret < 0) |
| 496 | return ret; |
| 497 | skb_put(skb, ret); |
| 498 | |
| 499 | /* Insert additional BOFs */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 500 | ret = irda_param_insert(self, PI_ADD_BOFS, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | skb_tailroom(skb), &irlap_param_info); |
| 502 | if (ret < 0) |
| 503 | return ret; |
| 504 | skb_put(skb, ret); |
| 505 | |
| 506 | /* Insert minimum turnaround time */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 507 | ret = irda_param_insert(self, PI_MIN_TURN_TIME, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | skb_tailroom(skb), &irlap_param_info); |
| 509 | if (ret < 0) |
| 510 | return ret; |
| 511 | skb_put(skb, ret); |
| 512 | |
| 513 | /* Insert link disconnect/threshold time */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 514 | ret = irda_param_insert(self, PI_LINK_DISC, skb->tail, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | skb_tailroom(skb), &irlap_param_info); |
| 516 | if (ret < 0) |
| 517 | return ret; |
| 518 | skb_put(skb, ret); |
| 519 | |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * Function irlap_param_baud_rate (instance, param, get) |
| 525 | * |
| 526 | * Negotiate data-rate |
| 527 | * |
| 528 | */ |
| 529 | static int irlap_param_baud_rate(void *instance, irda_param_t *param, int get) |
| 530 | { |
| 531 | __u16 final; |
| 532 | |
| 533 | struct irlap_cb *self = (struct irlap_cb *) instance; |
| 534 | |
| 535 | IRDA_ASSERT(self != NULL, return -1;); |
| 536 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
| 537 | |
| 538 | if (get) { |
| 539 | param->pv.i = self->qos_rx.baud_rate.bits; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 540 | IRDA_DEBUG(2, "%s(), baud rate = 0x%02x\n", |
| 541 | __FUNCTION__, param->pv.i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } else { |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 543 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | * Stations must agree on baud rate, so calculate |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 545 | * intersection |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | */ |
| 547 | IRDA_DEBUG(2, "Requested BAUD_RATE: 0x%04x\n", (__u16) param->pv.i); |
| 548 | final = (__u16) param->pv.i & self->qos_rx.baud_rate.bits; |
| 549 | |
| 550 | IRDA_DEBUG(2, "Final BAUD_RATE: 0x%04x\n", final); |
| 551 | self->qos_tx.baud_rate.bits = final; |
| 552 | self->qos_rx.baud_rate.bits = final; |
| 553 | } |
| 554 | |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * Function irlap_param_link_disconnect (instance, param, get) |
| 560 | * |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 561 | * Negotiate link disconnect/threshold time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | * |
| 563 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 564 | static int irlap_param_link_disconnect(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | int get) |
| 566 | { |
| 567 | __u16 final; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | struct irlap_cb *self = (struct irlap_cb *) instance; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | IRDA_ASSERT(self != NULL, return -1;); |
| 572 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | if (get) |
| 575 | param->pv.i = self->qos_rx.link_disc_time.bits; |
| 576 | else { |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 577 | /* |
| 578 | * Stations must agree on link disconnect/threshold |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | * time. |
| 580 | */ |
| 581 | IRDA_DEBUG(2, "LINK_DISC: %02x\n", (__u8) param->pv.i); |
| 582 | final = (__u8) param->pv.i & self->qos_rx.link_disc_time.bits; |
| 583 | |
| 584 | IRDA_DEBUG(2, "Final LINK_DISC: %02x\n", final); |
| 585 | self->qos_tx.link_disc_time.bits = final; |
| 586 | self->qos_rx.link_disc_time.bits = final; |
| 587 | } |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | /* |
| 592 | * Function irlap_param_max_turn_time (instance, param, get) |
| 593 | * |
| 594 | * Negotiate the maximum turnaround time. This is a type 1 parameter and |
| 595 | * will be negotiated independently for each station |
| 596 | * |
| 597 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 598 | static int irlap_param_max_turn_time(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | int get) |
| 600 | { |
| 601 | struct irlap_cb *self = (struct irlap_cb *) instance; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | IRDA_ASSERT(self != NULL, return -1;); |
| 604 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 605 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | if (get) |
| 607 | param->pv.i = self->qos_rx.max_turn_time.bits; |
| 608 | else |
| 609 | self->qos_tx.max_turn_time.bits = (__u8) param->pv.i; |
| 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * Function irlap_param_data_size (instance, param, get) |
| 616 | * |
| 617 | * Negotiate the data size. This is a type 1 parameter and |
| 618 | * will be negotiated independently for each station |
| 619 | * |
| 620 | */ |
| 621 | static int irlap_param_data_size(void *instance, irda_param_t *param, int get) |
| 622 | { |
| 623 | struct irlap_cb *self = (struct irlap_cb *) instance; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | IRDA_ASSERT(self != NULL, return -1;); |
| 626 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | if (get) |
| 629 | param->pv.i = self->qos_rx.data_size.bits; |
| 630 | else |
| 631 | self->qos_tx.data_size.bits = (__u8) param->pv.i; |
| 632 | |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * Function irlap_param_window_size (instance, param, get) |
| 638 | * |
| 639 | * Negotiate the window size. This is a type 1 parameter and |
| 640 | * will be negotiated independently for each station |
| 641 | * |
| 642 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 643 | static int irlap_param_window_size(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | int get) |
| 645 | { |
| 646 | struct irlap_cb *self = (struct irlap_cb *) instance; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | IRDA_ASSERT(self != NULL, return -1;); |
| 649 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | if (get) |
| 652 | param->pv.i = self->qos_rx.window_size.bits; |
| 653 | else |
| 654 | self->qos_tx.window_size.bits = (__u8) param->pv.i; |
| 655 | |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | /* |
| 660 | * Function irlap_param_additional_bofs (instance, param, get) |
| 661 | * |
| 662 | * Negotiate additional BOF characters. This is a type 1 parameter and |
| 663 | * will be negotiated independently for each station. |
| 664 | */ |
| 665 | static int irlap_param_additional_bofs(void *instance, irda_param_t *param, int get) |
| 666 | { |
| 667 | struct irlap_cb *self = (struct irlap_cb *) instance; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | IRDA_ASSERT(self != NULL, return -1;); |
| 670 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | if (get) |
| 673 | param->pv.i = self->qos_rx.additional_bofs.bits; |
| 674 | else |
| 675 | self->qos_tx.additional_bofs.bits = (__u8) param->pv.i; |
| 676 | |
| 677 | return 0; |
| 678 | } |
| 679 | |
| 680 | /* |
| 681 | * Function irlap_param_min_turn_time (instance, param, get) |
| 682 | * |
| 683 | * Negotiate the minimum turn around time. This is a type 1 parameter and |
| 684 | * will be negotiated independently for each station |
| 685 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 686 | static int irlap_param_min_turn_time(void *instance, irda_param_t *param, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | int get) |
| 688 | { |
| 689 | struct irlap_cb *self = (struct irlap_cb *) instance; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | IRDA_ASSERT(self != NULL, return -1;); |
| 692 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | if (get) |
| 695 | param->pv.i = self->qos_rx.min_turn_time.bits; |
| 696 | else |
| 697 | self->qos_tx.min_turn_time.bits = (__u8) param->pv.i; |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * Function irlap_max_line_capacity (speed, max_turn_time, min_turn_time) |
| 704 | * |
| 705 | * Calculate the maximum line capacity |
| 706 | * |
| 707 | */ |
| 708 | __u32 irlap_max_line_capacity(__u32 speed, __u32 max_turn_time) |
| 709 | { |
| 710 | __u32 line_capacity; |
| 711 | int i,j; |
| 712 | |
| 713 | IRDA_DEBUG(2, "%s(), speed=%d, max_turn_time=%d\n", |
| 714 | __FUNCTION__, speed, max_turn_time); |
| 715 | |
| 716 | i = value_index(speed, baud_rates, 10); |
| 717 | j = value_index(max_turn_time, max_turn_times, 4); |
| 718 | |
| 719 | IRDA_ASSERT(((i >=0) && (i <10)), return 0;); |
| 720 | IRDA_ASSERT(((j >=0) && (j <4)), return 0;); |
| 721 | |
| 722 | line_capacity = max_line_capacities[i][j]; |
| 723 | |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 724 | IRDA_DEBUG(2, "%s(), line capacity=%d bytes\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | __FUNCTION__, line_capacity); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 726 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | return line_capacity; |
| 728 | } |
| 729 | |
| 730 | #ifndef CONFIG_IRDA_DYNAMIC_WINDOW |
| 731 | static __u32 irlap_requested_line_capacity(struct qos_info *qos) |
| 732 | { |
| 733 | __u32 line_capacity; |
| 734 | |
| 735 | line_capacity = qos->window_size.value * |
| 736 | (qos->data_size.value + 6 + qos->additional_bofs.value) + |
| 737 | irlap_min_turn_time_in_bytes(qos->baud_rate.value, |
| 738 | qos->min_turn_time.value); |
| 739 | |
| 740 | IRDA_DEBUG(2, "%s(), requested line capacity=%d\n", |
| 741 | __FUNCTION__, line_capacity); |
| 742 | |
| 743 | return line_capacity; |
| 744 | } |
| 745 | #endif |
| 746 | |
| 747 | void irda_qos_bits_to_value(struct qos_info *qos) |
| 748 | { |
| 749 | int index; |
| 750 | |
| 751 | IRDA_ASSERT(qos != NULL, return;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | index = msb_index(qos->baud_rate.bits); |
| 754 | qos->baud_rate.value = baud_rates[index]; |
| 755 | |
| 756 | index = msb_index(qos->data_size.bits); |
| 757 | qos->data_size.value = data_sizes[index]; |
| 758 | |
| 759 | index = msb_index(qos->window_size.bits); |
| 760 | qos->window_size.value = index+1; |
| 761 | |
| 762 | index = msb_index(qos->min_turn_time.bits); |
| 763 | qos->min_turn_time.value = min_turn_times[index]; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | index = msb_index(qos->max_turn_time.bits); |
| 766 | qos->max_turn_time.value = max_turn_times[index]; |
| 767 | |
| 768 | index = msb_index(qos->link_disc_time.bits); |
| 769 | qos->link_disc_time.value = link_disc_times[index]; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | index = msb_index(qos->additional_bofs.bits); |
| 772 | qos->additional_bofs.value = add_bofs[index]; |
| 773 | } |
| 774 | EXPORT_SYMBOL(irda_qos_bits_to_value); |