Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1 | /* zd_mac.c |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 16 | */ |
| 17 | |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/wireless.h> |
| 21 | #include <linux/usb.h> |
| 22 | #include <linux/jiffies.h> |
| 23 | #include <net/ieee80211_radiotap.h> |
| 24 | |
| 25 | #include "zd_def.h" |
| 26 | #include "zd_chip.h" |
| 27 | #include "zd_mac.h" |
| 28 | #include "zd_ieee80211.h" |
| 29 | #include "zd_netdev.h" |
| 30 | #include "zd_rf.h" |
| 31 | #include "zd_util.h" |
| 32 | |
| 33 | static void ieee_init(struct ieee80211_device *ieee); |
| 34 | static void softmac_init(struct ieee80211softmac_device *sm); |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 35 | static void set_rts_cts_work(struct work_struct *work); |
| 36 | static void set_basic_rates_work(struct work_struct *work); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 37 | |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 38 | static void housekeeping_init(struct zd_mac *mac); |
| 39 | static void housekeeping_enable(struct zd_mac *mac); |
| 40 | static void housekeeping_disable(struct zd_mac *mac); |
| 41 | |
Jeff Garzik | 0ae8513 | 2006-12-07 06:30:30 -0500 | [diff] [blame] | 42 | static void set_multicast_hash_handler(struct work_struct *work); |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 43 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 44 | static void do_rx(unsigned long mac_ptr); |
| 45 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 46 | int zd_mac_init(struct zd_mac *mac, |
| 47 | struct net_device *netdev, |
| 48 | struct usb_interface *intf) |
| 49 | { |
| 50 | struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev); |
| 51 | |
| 52 | memset(mac, 0, sizeof(*mac)); |
| 53 | spin_lock_init(&mac->lock); |
| 54 | mac->netdev = netdev; |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 55 | INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work); |
| 56 | INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 57 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 58 | skb_queue_head_init(&mac->rx_queue); |
| 59 | tasklet_init(&mac->rx_tasklet, do_rx, (unsigned long)mac); |
| 60 | tasklet_disable(&mac->rx_tasklet); |
| 61 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 62 | ieee_init(ieee); |
| 63 | softmac_init(ieee80211_priv(netdev)); |
| 64 | zd_chip_init(&mac->chip, netdev, intf); |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 65 | housekeeping_init(mac); |
Jeff Garzik | 0ae8513 | 2006-12-07 06:30:30 -0500 | [diff] [blame] | 66 | INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static int reset_channel(struct zd_mac *mac) |
| 71 | { |
| 72 | int r; |
| 73 | unsigned long flags; |
| 74 | const struct channel_range *range; |
| 75 | |
| 76 | spin_lock_irqsave(&mac->lock, flags); |
| 77 | range = zd_channel_range(mac->regdomain); |
| 78 | if (!range->start) { |
| 79 | r = -EINVAL; |
| 80 | goto out; |
| 81 | } |
| 82 | mac->requested_channel = range->start; |
| 83 | r = 0; |
| 84 | out: |
| 85 | spin_unlock_irqrestore(&mac->lock, flags); |
| 86 | return r; |
| 87 | } |
| 88 | |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 89 | int zd_mac_preinit_hw(struct zd_mac *mac) |
| 90 | { |
| 91 | int r; |
| 92 | u8 addr[ETH_ALEN]; |
| 93 | |
| 94 | r = zd_chip_read_mac_addr_fw(&mac->chip, addr); |
| 95 | if (r) |
| 96 | return r; |
| 97 | |
| 98 | memcpy(mac->netdev->dev_addr, addr, ETH_ALEN); |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | int zd_mac_init_hw(struct zd_mac *mac) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 103 | { |
| 104 | int r; |
| 105 | struct zd_chip *chip = &mac->chip; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 106 | u8 default_regdomain; |
| 107 | |
| 108 | r = zd_chip_enable_int(chip); |
| 109 | if (r) |
| 110 | goto out; |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 111 | r = zd_chip_init_hw(chip); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 112 | if (r) |
| 113 | goto disable_int; |
| 114 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 115 | ZD_ASSERT(!irqs_disabled()); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 116 | |
| 117 | r = zd_read_regdomain(chip, &default_regdomain); |
| 118 | if (r) |
| 119 | goto disable_int; |
| 120 | if (!zd_regdomain_supported(default_regdomain)) { |
Daniel Drake | 86d95c21 | 2007-07-01 18:21:49 +0100 | [diff] [blame] | 121 | /* The vendor driver overrides the regulatory domain and |
| 122 | * allowed channel registers and unconditionally restricts |
| 123 | * available channels to 1-11 everywhere. Match their |
| 124 | * questionable behaviour only for regdomains which we don't |
| 125 | * recognise. */ |
| 126 | dev_warn(zd_mac_dev(mac), "Unrecognised regulatory domain: " |
| 127 | "%#04x. Defaulting to FCC.\n", default_regdomain); |
| 128 | default_regdomain = ZD_REGDOMAIN_FCC; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 129 | } |
| 130 | spin_lock_irq(&mac->lock); |
| 131 | mac->regdomain = mac->default_regdomain = default_regdomain; |
| 132 | spin_unlock_irq(&mac->lock); |
| 133 | r = reset_channel(mac); |
| 134 | if (r) |
| 135 | goto disable_int; |
| 136 | |
Daniel Drake | 40da08b | 2006-08-01 23:43:32 +0200 | [diff] [blame] | 137 | /* We must inform the device that we are doing encryption/decryption in |
| 138 | * software at the moment. */ |
| 139 | r = zd_set_encryption_type(chip, ENC_SNIFFER); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 140 | if (r) |
| 141 | goto disable_int; |
| 142 | |
| 143 | r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain); |
| 144 | if (r) |
| 145 | goto disable_int; |
| 146 | |
| 147 | r = 0; |
| 148 | disable_int: |
| 149 | zd_chip_disable_int(chip); |
| 150 | out: |
| 151 | return r; |
| 152 | } |
| 153 | |
| 154 | void zd_mac_clear(struct zd_mac *mac) |
| 155 | { |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 156 | flush_workqueue(zd_workqueue); |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 157 | skb_queue_purge(&mac->rx_queue); |
| 158 | tasklet_kill(&mac->rx_tasklet); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 159 | zd_chip_clear(&mac->chip); |
Ulrich Kunitz | c48cf12 | 2006-08-12 18:00:17 +0100 | [diff] [blame] | 160 | ZD_ASSERT(!spin_is_locked(&mac->lock)); |
| 161 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 162 | } |
| 163 | |
Ulrich Kunitz | c569123 | 2007-07-21 22:42:13 +0100 | [diff] [blame] | 164 | static int set_rx_filter(struct zd_mac *mac) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 165 | { |
| 166 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
Daniel Drake | 44713b1 | 2007-03-26 00:59:47 +0100 | [diff] [blame] | 167 | u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER; |
| 168 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 169 | } |
| 170 | |
Ulrich Kunitz | c569123 | 2007-07-21 22:42:13 +0100 | [diff] [blame] | 171 | static int set_sniffer(struct zd_mac *mac) |
| 172 | { |
| 173 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| 174 | return zd_iowrite32(&mac->chip, CR_SNIFFER_ON, |
| 175 | ieee->iw_mode == IW_MODE_MONITOR ? 1 : 0); |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int set_mc_hash(struct zd_mac *mac) |
| 180 | { |
| 181 | struct zd_mc_hash hash; |
| 182 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| 183 | |
| 184 | zd_mc_clear(&hash); |
| 185 | if (ieee->iw_mode == IW_MODE_MONITOR) |
| 186 | zd_mc_add_all(&hash); |
| 187 | |
| 188 | return zd_chip_set_multicast_hash(&mac->chip, &hash); |
| 189 | } |
| 190 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 191 | int zd_mac_open(struct net_device *netdev) |
| 192 | { |
| 193 | struct zd_mac *mac = zd_netdev_mac(netdev); |
| 194 | struct zd_chip *chip = &mac->chip; |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 195 | struct zd_usb *usb = &chip->usb; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 196 | int r; |
| 197 | |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 198 | if (!usb->initialized) { |
| 199 | r = zd_usb_init_hw(usb); |
| 200 | if (r) |
| 201 | goto out; |
| 202 | } |
| 203 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 204 | tasklet_enable(&mac->rx_tasklet); |
| 205 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 206 | r = zd_chip_enable_int(chip); |
| 207 | if (r < 0) |
| 208 | goto out; |
| 209 | |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 210 | r = zd_write_mac_addr(chip, netdev->dev_addr); |
| 211 | if (r) |
| 212 | goto disable_int; |
| 213 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 214 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); |
| 215 | if (r < 0) |
| 216 | goto disable_int; |
Ulrich Kunitz | c569123 | 2007-07-21 22:42:13 +0100 | [diff] [blame] | 217 | r = set_rx_filter(mac); |
| 218 | if (r) |
| 219 | goto disable_int; |
| 220 | r = set_sniffer(mac); |
| 221 | if (r) |
| 222 | goto disable_int; |
| 223 | r = set_mc_hash(mac); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 224 | if (r) |
| 225 | goto disable_int; |
| 226 | r = zd_chip_switch_radio_on(chip); |
| 227 | if (r < 0) |
| 228 | goto disable_int; |
| 229 | r = zd_chip_set_channel(chip, mac->requested_channel); |
| 230 | if (r < 0) |
| 231 | goto disable_radio; |
| 232 | r = zd_chip_enable_rx(chip); |
| 233 | if (r < 0) |
| 234 | goto disable_radio; |
| 235 | r = zd_chip_enable_hwint(chip); |
| 236 | if (r < 0) |
| 237 | goto disable_rx; |
| 238 | |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 239 | housekeeping_enable(mac); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 240 | ieee80211softmac_start(netdev); |
| 241 | return 0; |
| 242 | disable_rx: |
| 243 | zd_chip_disable_rx(chip); |
| 244 | disable_radio: |
| 245 | zd_chip_switch_radio_off(chip); |
| 246 | disable_int: |
| 247 | zd_chip_disable_int(chip); |
| 248 | out: |
| 249 | return r; |
| 250 | } |
| 251 | |
| 252 | int zd_mac_stop(struct net_device *netdev) |
| 253 | { |
| 254 | struct zd_mac *mac = zd_netdev_mac(netdev); |
| 255 | struct zd_chip *chip = &mac->chip; |
| 256 | |
Daniel Drake | c9a4b35 | 2006-06-11 23:18:54 +0100 | [diff] [blame] | 257 | netif_stop_queue(netdev); |
| 258 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 259 | /* |
| 260 | * The order here deliberately is a little different from the open() |
| 261 | * method, since we need to make sure there is no opportunity for RX |
| 262 | * frames to be processed by softmac after we have stopped it. |
| 263 | */ |
| 264 | |
| 265 | zd_chip_disable_rx(chip); |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 266 | skb_queue_purge(&mac->rx_queue); |
| 267 | tasklet_disable(&mac->rx_tasklet); |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 268 | housekeeping_disable(mac); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 269 | ieee80211softmac_stop(netdev); |
| 270 | |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 271 | /* Ensure no work items are running or queued from this point */ |
| 272 | cancel_delayed_work(&mac->set_rts_cts_work); |
| 273 | cancel_delayed_work(&mac->set_basic_rates_work); |
| 274 | flush_workqueue(zd_workqueue); |
| 275 | mac->updating_rts_rate = 0; |
| 276 | mac->updating_basic_rates = 0; |
| 277 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 278 | zd_chip_disable_hwint(chip); |
| 279 | zd_chip_switch_radio_off(chip); |
| 280 | zd_chip_disable_int(chip); |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | int zd_mac_set_mac_address(struct net_device *netdev, void *p) |
| 286 | { |
| 287 | int r; |
| 288 | unsigned long flags; |
| 289 | struct sockaddr *addr = p; |
| 290 | struct zd_mac *mac = zd_netdev_mac(netdev); |
| 291 | struct zd_chip *chip = &mac->chip; |
| 292 | |
| 293 | if (!is_valid_ether_addr(addr->sa_data)) |
| 294 | return -EADDRNOTAVAIL; |
| 295 | |
| 296 | dev_dbg_f(zd_mac_dev(mac), |
| 297 | "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data)); |
| 298 | |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 299 | if (netdev->flags & IFF_UP) { |
| 300 | r = zd_write_mac_addr(chip, addr->sa_data); |
| 301 | if (r) |
| 302 | return r; |
| 303 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 304 | |
| 305 | spin_lock_irqsave(&mac->lock, flags); |
| 306 | memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN); |
| 307 | spin_unlock_irqrestore(&mac->lock, flags); |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
Jeff Garzik | 0ae8513 | 2006-12-07 06:30:30 -0500 | [diff] [blame] | 312 | static void set_multicast_hash_handler(struct work_struct *work) |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 313 | { |
Jeff Garzik | 0ae8513 | 2006-12-07 06:30:30 -0500 | [diff] [blame] | 314 | struct zd_mac *mac = container_of(work, struct zd_mac, |
| 315 | set_multicast_hash_work); |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 316 | struct zd_mc_hash hash; |
| 317 | |
| 318 | spin_lock_irq(&mac->lock); |
| 319 | hash = mac->multicast_hash; |
| 320 | spin_unlock_irq(&mac->lock); |
| 321 | |
| 322 | zd_chip_set_multicast_hash(&mac->chip, &hash); |
| 323 | } |
| 324 | |
| 325 | void zd_mac_set_multicast_list(struct net_device *dev) |
| 326 | { |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 327 | struct zd_mac *mac = zd_netdev_mac(dev); |
Ulrich Kunitz | c569123 | 2007-07-21 22:42:13 +0100 | [diff] [blame] | 328 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| 329 | struct zd_mc_hash hash; |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 330 | struct dev_mc_list *mc; |
| 331 | unsigned long flags; |
| 332 | |
Ulrich Kunitz | c569123 | 2007-07-21 22:42:13 +0100 | [diff] [blame] | 333 | if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI) || |
| 334 | ieee->iw_mode == IW_MODE_MONITOR) { |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 335 | zd_mc_add_all(&hash); |
| 336 | } else { |
| 337 | zd_mc_clear(&hash); |
| 338 | for (mc = dev->mc_list; mc; mc = mc->next) { |
| 339 | dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n", |
| 340 | MAC_ARG(mc->dmi_addr)); |
| 341 | zd_mc_add_addr(&hash, mc->dmi_addr); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | spin_lock_irqsave(&mac->lock, flags); |
| 346 | mac->multicast_hash = hash; |
| 347 | spin_unlock_irqrestore(&mac->lock, flags); |
| 348 | queue_work(zd_workqueue, &mac->set_multicast_hash_work); |
| 349 | } |
| 350 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 351 | int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain) |
| 352 | { |
| 353 | int r; |
| 354 | u8 channel; |
| 355 | |
| 356 | ZD_ASSERT(!irqs_disabled()); |
| 357 | spin_lock_irq(&mac->lock); |
| 358 | if (regdomain == 0) { |
| 359 | regdomain = mac->default_regdomain; |
| 360 | } |
| 361 | if (!zd_regdomain_supported(regdomain)) { |
| 362 | spin_unlock_irq(&mac->lock); |
| 363 | return -EINVAL; |
| 364 | } |
| 365 | mac->regdomain = regdomain; |
| 366 | channel = mac->requested_channel; |
| 367 | spin_unlock_irq(&mac->lock); |
| 368 | |
| 369 | r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain); |
| 370 | if (r) |
| 371 | return r; |
| 372 | if (!zd_regdomain_supports_channel(regdomain, channel)) { |
| 373 | r = reset_channel(mac); |
| 374 | if (r) |
| 375 | return r; |
| 376 | } |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | u8 zd_mac_get_regdomain(struct zd_mac *mac) |
| 382 | { |
| 383 | unsigned long flags; |
| 384 | u8 regdomain; |
| 385 | |
| 386 | spin_lock_irqsave(&mac->lock, flags); |
| 387 | regdomain = mac->regdomain; |
| 388 | spin_unlock_irqrestore(&mac->lock, flags); |
| 389 | return regdomain; |
| 390 | } |
| 391 | |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 392 | /* Fallback to lowest rate, if rate is unknown. */ |
| 393 | static u8 rate_to_zd_rate(u8 rate) |
| 394 | { |
| 395 | switch (rate) { |
| 396 | case IEEE80211_CCK_RATE_2MB: |
| 397 | return ZD_CCK_RATE_2M; |
| 398 | case IEEE80211_CCK_RATE_5MB: |
| 399 | return ZD_CCK_RATE_5_5M; |
| 400 | case IEEE80211_CCK_RATE_11MB: |
| 401 | return ZD_CCK_RATE_11M; |
| 402 | case IEEE80211_OFDM_RATE_6MB: |
| 403 | return ZD_OFDM_RATE_6M; |
| 404 | case IEEE80211_OFDM_RATE_9MB: |
| 405 | return ZD_OFDM_RATE_9M; |
| 406 | case IEEE80211_OFDM_RATE_12MB: |
| 407 | return ZD_OFDM_RATE_12M; |
| 408 | case IEEE80211_OFDM_RATE_18MB: |
| 409 | return ZD_OFDM_RATE_18M; |
| 410 | case IEEE80211_OFDM_RATE_24MB: |
| 411 | return ZD_OFDM_RATE_24M; |
| 412 | case IEEE80211_OFDM_RATE_36MB: |
| 413 | return ZD_OFDM_RATE_36M; |
| 414 | case IEEE80211_OFDM_RATE_48MB: |
| 415 | return ZD_OFDM_RATE_48M; |
| 416 | case IEEE80211_OFDM_RATE_54MB: |
| 417 | return ZD_OFDM_RATE_54M; |
| 418 | } |
| 419 | return ZD_CCK_RATE_1M; |
| 420 | } |
| 421 | |
| 422 | static u16 rate_to_cr_rate(u8 rate) |
| 423 | { |
| 424 | switch (rate) { |
| 425 | case IEEE80211_CCK_RATE_2MB: |
| 426 | return CR_RATE_1M; |
| 427 | case IEEE80211_CCK_RATE_5MB: |
| 428 | return CR_RATE_5_5M; |
| 429 | case IEEE80211_CCK_RATE_11MB: |
| 430 | return CR_RATE_11M; |
| 431 | case IEEE80211_OFDM_RATE_6MB: |
| 432 | return CR_RATE_6M; |
| 433 | case IEEE80211_OFDM_RATE_9MB: |
| 434 | return CR_RATE_9M; |
| 435 | case IEEE80211_OFDM_RATE_12MB: |
| 436 | return CR_RATE_12M; |
| 437 | case IEEE80211_OFDM_RATE_18MB: |
| 438 | return CR_RATE_18M; |
| 439 | case IEEE80211_OFDM_RATE_24MB: |
| 440 | return CR_RATE_24M; |
| 441 | case IEEE80211_OFDM_RATE_36MB: |
| 442 | return CR_RATE_36M; |
| 443 | case IEEE80211_OFDM_RATE_48MB: |
| 444 | return CR_RATE_48M; |
| 445 | case IEEE80211_OFDM_RATE_54MB: |
| 446 | return CR_RATE_54M; |
| 447 | } |
| 448 | return CR_RATE_1M; |
| 449 | } |
| 450 | |
| 451 | static void try_enable_tx(struct zd_mac *mac) |
| 452 | { |
| 453 | unsigned long flags; |
| 454 | |
| 455 | spin_lock_irqsave(&mac->lock, flags); |
| 456 | if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0) |
| 457 | netif_wake_queue(mac->netdev); |
| 458 | spin_unlock_irqrestore(&mac->lock, flags); |
| 459 | } |
| 460 | |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 461 | static void set_rts_cts_work(struct work_struct *work) |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 462 | { |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 463 | struct zd_mac *mac = |
| 464 | container_of(work, struct zd_mac, set_rts_cts_work.work); |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 465 | unsigned long flags; |
| 466 | u8 rts_rate; |
| 467 | unsigned int short_preamble; |
| 468 | |
| 469 | mutex_lock(&mac->chip.mutex); |
| 470 | |
| 471 | spin_lock_irqsave(&mac->lock, flags); |
| 472 | mac->updating_rts_rate = 0; |
| 473 | rts_rate = mac->rts_rate; |
| 474 | short_preamble = mac->short_preamble; |
| 475 | spin_unlock_irqrestore(&mac->lock, flags); |
| 476 | |
| 477 | zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble); |
| 478 | mutex_unlock(&mac->chip.mutex); |
| 479 | |
| 480 | try_enable_tx(mac); |
| 481 | } |
| 482 | |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 483 | static void set_basic_rates_work(struct work_struct *work) |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 484 | { |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 485 | struct zd_mac *mac = |
| 486 | container_of(work, struct zd_mac, set_basic_rates_work.work); |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 487 | unsigned long flags; |
| 488 | u16 basic_rates; |
| 489 | |
| 490 | mutex_lock(&mac->chip.mutex); |
| 491 | |
| 492 | spin_lock_irqsave(&mac->lock, flags); |
| 493 | mac->updating_basic_rates = 0; |
| 494 | basic_rates = mac->basic_rates; |
| 495 | spin_unlock_irqrestore(&mac->lock, flags); |
| 496 | |
| 497 | zd_chip_set_basic_rates_locked(&mac->chip, basic_rates); |
| 498 | mutex_unlock(&mac->chip.mutex); |
| 499 | |
| 500 | try_enable_tx(mac); |
| 501 | } |
| 502 | |
| 503 | static void bssinfo_change(struct net_device *netdev, u32 changes) |
| 504 | { |
| 505 | struct zd_mac *mac = zd_netdev_mac(netdev); |
| 506 | struct ieee80211softmac_device *softmac = ieee80211_priv(netdev); |
| 507 | struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo; |
| 508 | int need_set_rts_cts = 0; |
| 509 | int need_set_rates = 0; |
| 510 | u16 basic_rates; |
| 511 | unsigned long flags; |
| 512 | |
| 513 | dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); |
| 514 | |
| 515 | if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) { |
| 516 | spin_lock_irqsave(&mac->lock, flags); |
| 517 | mac->short_preamble = bssinfo->short_preamble; |
| 518 | spin_unlock_irqrestore(&mac->lock, flags); |
| 519 | need_set_rts_cts = 1; |
| 520 | } |
| 521 | |
| 522 | if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) { |
| 523 | /* Set RTS rate to highest available basic rate */ |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 524 | u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac, |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 525 | &bssinfo->supported_rates, 1); |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 526 | hi_rate = rate_to_zd_rate(hi_rate); |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 527 | |
| 528 | spin_lock_irqsave(&mac->lock, flags); |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 529 | if (hi_rate != mac->rts_rate) { |
| 530 | mac->rts_rate = hi_rate; |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 531 | need_set_rts_cts = 1; |
| 532 | } |
| 533 | spin_unlock_irqrestore(&mac->lock, flags); |
| 534 | |
| 535 | /* Set basic rates */ |
| 536 | need_set_rates = 1; |
| 537 | if (bssinfo->supported_rates.count == 0) { |
| 538 | /* Allow the device to be flexible */ |
| 539 | basic_rates = CR_RATES_80211B | CR_RATES_80211G; |
| 540 | } else { |
| 541 | int i = 0; |
| 542 | basic_rates = 0; |
| 543 | |
| 544 | for (i = 0; i < bssinfo->supported_rates.count; i++) { |
| 545 | u16 rate = bssinfo->supported_rates.rates[i]; |
| 546 | if ((rate & IEEE80211_BASIC_RATE_MASK) == 0) |
| 547 | continue; |
| 548 | |
| 549 | rate &= ~IEEE80211_BASIC_RATE_MASK; |
| 550 | basic_rates |= rate_to_cr_rate(rate); |
| 551 | } |
| 552 | } |
| 553 | spin_lock_irqsave(&mac->lock, flags); |
| 554 | mac->basic_rates = basic_rates; |
| 555 | spin_unlock_irqrestore(&mac->lock, flags); |
| 556 | } |
| 557 | |
| 558 | /* Schedule any changes we made above */ |
| 559 | |
| 560 | spin_lock_irqsave(&mac->lock, flags); |
| 561 | if (need_set_rts_cts && !mac->updating_rts_rate) { |
| 562 | mac->updating_rts_rate = 1; |
| 563 | netif_stop_queue(mac->netdev); |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 564 | queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0); |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 565 | } |
| 566 | if (need_set_rates && !mac->updating_basic_rates) { |
| 567 | mac->updating_basic_rates = 1; |
| 568 | netif_stop_queue(mac->netdev); |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 569 | queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work, |
| 570 | 0); |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 571 | } |
| 572 | spin_unlock_irqrestore(&mac->lock, flags); |
| 573 | } |
| 574 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 575 | static void set_channel(struct net_device *netdev, u8 channel) |
| 576 | { |
| 577 | struct zd_mac *mac = zd_netdev_mac(netdev); |
| 578 | |
| 579 | dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel); |
| 580 | |
| 581 | zd_chip_set_channel(&mac->chip, channel); |
| 582 | } |
| 583 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 584 | int zd_mac_request_channel(struct zd_mac *mac, u8 channel) |
| 585 | { |
| 586 | unsigned long lock_flags; |
| 587 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| 588 | |
| 589 | if (ieee->iw_mode == IW_MODE_INFRA) |
| 590 | return -EPERM; |
| 591 | |
| 592 | spin_lock_irqsave(&mac->lock, lock_flags); |
| 593 | if (!zd_regdomain_supports_channel(mac->regdomain, channel)) { |
| 594 | spin_unlock_irqrestore(&mac->lock, lock_flags); |
| 595 | return -EINVAL; |
| 596 | } |
| 597 | mac->requested_channel = channel; |
| 598 | spin_unlock_irqrestore(&mac->lock, lock_flags); |
| 599 | if (netif_running(mac->netdev)) |
| 600 | return zd_chip_set_channel(&mac->chip, channel); |
| 601 | else |
| 602 | return 0; |
| 603 | } |
| 604 | |
Daniel Drake | 84bc715 | 2006-11-22 00:05:30 +0000 | [diff] [blame] | 605 | u8 zd_mac_get_channel(struct zd_mac *mac) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 606 | { |
Daniel Drake | 84bc715 | 2006-11-22 00:05:30 +0000 | [diff] [blame] | 607 | u8 channel = zd_chip_get_channel(&mac->chip); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 608 | |
Daniel Drake | 84bc715 | 2006-11-22 00:05:30 +0000 | [diff] [blame] | 609 | dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel); |
| 610 | return channel; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */ |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 614 | static u8 zd_rate_typed(u8 zd_rate) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 615 | { |
| 616 | static const u8 typed_rates[16] = { |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 617 | [ZD_CCK_RATE_1M] = ZD_CS_CCK|ZD_CCK_RATE_1M, |
| 618 | [ZD_CCK_RATE_2M] = ZD_CS_CCK|ZD_CCK_RATE_2M, |
| 619 | [ZD_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CCK_RATE_5_5M, |
| 620 | [ZD_CCK_RATE_11M] = ZD_CS_CCK|ZD_CCK_RATE_11M, |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 621 | [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M, |
| 622 | [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M, |
| 623 | [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M, |
| 624 | [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M, |
| 625 | [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M, |
| 626 | [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M, |
| 627 | [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M, |
| 628 | [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M, |
| 629 | }; |
| 630 | |
| 631 | ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f); |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 632 | return typed_rates[zd_rate & ZD_CS_RATE_MASK]; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 633 | } |
| 634 | |
| 635 | int zd_mac_set_mode(struct zd_mac *mac, u32 mode) |
| 636 | { |
| 637 | struct ieee80211_device *ieee; |
| 638 | |
| 639 | switch (mode) { |
| 640 | case IW_MODE_AUTO: |
| 641 | case IW_MODE_ADHOC: |
| 642 | case IW_MODE_INFRA: |
| 643 | mac->netdev->type = ARPHRD_ETHER; |
| 644 | break; |
| 645 | case IW_MODE_MONITOR: |
| 646 | mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP; |
| 647 | break; |
| 648 | default: |
| 649 | dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode); |
| 650 | return -EINVAL; |
| 651 | } |
| 652 | |
| 653 | ieee = zd_mac_to_ieee80211(mac); |
| 654 | ZD_ASSERT(!irqs_disabled()); |
| 655 | spin_lock_irq(&ieee->lock); |
| 656 | ieee->iw_mode = mode; |
| 657 | spin_unlock_irq(&ieee->lock); |
| 658 | |
Ulrich Kunitz | c569123 | 2007-07-21 22:42:13 +0100 | [diff] [blame] | 659 | if (netif_running(mac->netdev)) { |
| 660 | int r = set_rx_filter(mac); |
| 661 | if (r) |
| 662 | return r; |
| 663 | return set_sniffer(mac); |
| 664 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 665 | |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | int zd_mac_get_mode(struct zd_mac *mac, u32 *mode) |
| 670 | { |
| 671 | unsigned long flags; |
| 672 | struct ieee80211_device *ieee; |
| 673 | |
| 674 | ieee = zd_mac_to_ieee80211(mac); |
| 675 | spin_lock_irqsave(&ieee->lock, flags); |
| 676 | *mode = ieee->iw_mode; |
| 677 | spin_unlock_irqrestore(&ieee->lock, flags); |
| 678 | return 0; |
| 679 | } |
| 680 | |
| 681 | int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range) |
| 682 | { |
| 683 | int i; |
| 684 | const struct channel_range *channel_range; |
| 685 | u8 regdomain; |
| 686 | |
| 687 | memset(range, 0, sizeof(*range)); |
| 688 | |
| 689 | /* FIXME: Not so important and depends on the mode. For 802.11g |
| 690 | * usually this value is used. It seems to be that Bit/s number is |
| 691 | * given here. |
| 692 | */ |
| 693 | range->throughput = 27 * 1000 * 1000; |
| 694 | |
| 695 | range->max_qual.qual = 100; |
| 696 | range->max_qual.level = 100; |
| 697 | |
| 698 | /* FIXME: Needs still to be tuned. */ |
| 699 | range->avg_qual.qual = 71; |
| 700 | range->avg_qual.level = 80; |
| 701 | |
| 702 | /* FIXME: depends on standard? */ |
| 703 | range->min_rts = 256; |
| 704 | range->max_rts = 2346; |
| 705 | |
| 706 | range->min_frag = MIN_FRAG_THRESHOLD; |
| 707 | range->max_frag = MAX_FRAG_THRESHOLD; |
| 708 | |
| 709 | range->max_encoding_tokens = WEP_KEYS; |
| 710 | range->num_encoding_sizes = 2; |
| 711 | range->encoding_size[0] = 5; |
| 712 | range->encoding_size[1] = WEP_KEY_LEN; |
| 713 | |
| 714 | range->we_version_compiled = WIRELESS_EXT; |
| 715 | range->we_version_source = 20; |
| 716 | |
Daniel Drake | ff9b99b | 2006-12-01 00:57:11 +0000 | [diff] [blame] | 717 | range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 | |
| 718 | IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP; |
| 719 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 720 | ZD_ASSERT(!irqs_disabled()); |
| 721 | spin_lock_irq(&mac->lock); |
| 722 | regdomain = mac->regdomain; |
| 723 | spin_unlock_irq(&mac->lock); |
| 724 | channel_range = zd_channel_range(regdomain); |
| 725 | |
| 726 | range->num_channels = channel_range->end - channel_range->start; |
| 727 | range->old_num_channels = range->num_channels; |
| 728 | range->num_frequency = range->num_channels; |
| 729 | range->old_num_frequency = range->num_frequency; |
| 730 | |
| 731 | for (i = 0; i < range->num_frequency; i++) { |
| 732 | struct iw_freq *freq = &range->freq[i]; |
| 733 | freq->i = channel_range->start + i; |
| 734 | zd_channel_to_freq(freq, freq->i); |
| 735 | } |
| 736 | |
| 737 | return 0; |
| 738 | } |
| 739 | |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 740 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 741 | { |
| 742 | static const u8 rate_divisor[] = { |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 743 | [ZD_CCK_RATE_1M] = 1, |
| 744 | [ZD_CCK_RATE_2M] = 2, |
| 745 | [ZD_CCK_RATE_5_5M] = 11, /* bits must be doubled */ |
| 746 | [ZD_CCK_RATE_11M] = 11, |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 747 | [ZD_OFDM_RATE_6M] = 6, |
| 748 | [ZD_OFDM_RATE_9M] = 9, |
| 749 | [ZD_OFDM_RATE_12M] = 12, |
| 750 | [ZD_OFDM_RATE_18M] = 18, |
| 751 | [ZD_OFDM_RATE_24M] = 24, |
| 752 | [ZD_OFDM_RATE_36M] = 36, |
| 753 | [ZD_OFDM_RATE_48M] = 48, |
| 754 | [ZD_OFDM_RATE_54M] = 54, |
| 755 | }; |
| 756 | |
| 757 | u32 bits = (u32)tx_length * 8; |
| 758 | u32 divisor; |
| 759 | |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 760 | divisor = rate_divisor[zd_rate]; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 761 | if (divisor == 0) |
| 762 | return -EINVAL; |
| 763 | |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 764 | switch (zd_rate) { |
| 765 | case ZD_CCK_RATE_5_5M: |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 766 | bits = (2*bits) + 10; /* round up to the next integer */ |
| 767 | break; |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 768 | case ZD_CCK_RATE_11M: |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 769 | if (service) { |
| 770 | u32 t = bits % 11; |
| 771 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; |
| 772 | if (0 < t && t <= 3) { |
| 773 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; |
| 774 | } |
| 775 | } |
| 776 | bits += 10; /* round up to the next integer */ |
| 777 | break; |
| 778 | } |
| 779 | |
| 780 | return bits/divisor; |
| 781 | } |
| 782 | |
| 783 | enum { |
| 784 | R2M_SHORT_PREAMBLE = 0x01, |
| 785 | R2M_11A = 0x02, |
| 786 | }; |
| 787 | |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 788 | static u8 zd_rate_to_modulation(u8 zd_rate, int flags) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 789 | { |
| 790 | u8 modulation; |
| 791 | |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 792 | modulation = zd_rate_typed(zd_rate); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 793 | if (flags & R2M_SHORT_PREAMBLE) { |
| 794 | switch (ZD_CS_RATE(modulation)) { |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 795 | case ZD_CCK_RATE_2M: |
| 796 | case ZD_CCK_RATE_5_5M: |
| 797 | case ZD_CCK_RATE_11M: |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 798 | modulation |= ZD_CS_CCK_PREA_SHORT; |
| 799 | return modulation; |
| 800 | } |
| 801 | } |
| 802 | if (flags & R2M_11A) { |
| 803 | if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM) |
| 804 | modulation |= ZD_CS_OFDM_MODE_11A; |
| 805 | } |
| 806 | return modulation; |
| 807 | } |
| 808 | |
| 809 | static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs, |
| 810 | struct ieee80211_hdr_4addr *hdr) |
| 811 | { |
| 812 | struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev); |
| 813 | u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl)); |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 814 | u8 rate, zd_rate; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 815 | int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0; |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 816 | int is_multicast = is_multicast_ether_addr(hdr->addr1); |
| 817 | int short_preamble = ieee80211softmac_short_preamble_ok(softmac, |
| 818 | is_multicast, is_mgt); |
| 819 | int flags = 0; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 820 | |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 821 | /* FIXME: 802.11a? */ |
| 822 | rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 823 | |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 824 | if (short_preamble) |
| 825 | flags |= R2M_SHORT_PREAMBLE; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 826 | |
Daniel Drake | b1cd8416 | 2006-11-22 00:06:38 +0000 | [diff] [blame] | 827 | zd_rate = rate_to_zd_rate(rate); |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 828 | cs->modulation = zd_rate_to_modulation(zd_rate, flags); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, |
| 832 | struct ieee80211_hdr_4addr *header) |
| 833 | { |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 834 | struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 835 | unsigned int tx_length = le16_to_cpu(cs->tx_length); |
| 836 | u16 fctl = le16_to_cpu(header->frame_ctl); |
| 837 | u16 ftype = WLAN_FC_GET_TYPE(fctl); |
| 838 | u16 stype = WLAN_FC_GET_STYPE(fctl); |
| 839 | |
| 840 | /* |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 841 | * CONTROL TODO: |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 842 | * - if backoff needed, enable bit 0 |
| 843 | * - if burst (backoff not needed) disable bit 0 |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 844 | */ |
| 845 | |
| 846 | cs->control = 0; |
| 847 | |
| 848 | /* First fragment */ |
| 849 | if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0) |
| 850 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; |
| 851 | |
| 852 | /* Multicast */ |
| 853 | if (is_multicast_ether_addr(header->addr1)) |
| 854 | cs->control |= ZD_CS_MULTICAST; |
| 855 | |
| 856 | /* PS-POLL */ |
Ulrich Kunitz | 69dad6e | 2007-07-21 22:42:02 +0100 | [diff] [blame] | 857 | if (ftype == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 858 | cs->control |= ZD_CS_PS_POLL_FRAME; |
| 859 | |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 860 | /* Unicast data frames over the threshold should have RTS */ |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 861 | if (!is_multicast_ether_addr(header->addr1) && |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 862 | ftype != IEEE80211_FTYPE_MGMT && |
| 863 | tx_length > zd_netdev_ieee80211(mac->netdev)->rts) |
| 864 | cs->control |= ZD_CS_RTS; |
| 865 | |
| 866 | /* Use CTS-to-self protection if required */ |
| 867 | if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM && |
| 868 | ieee80211softmac_protection_needed(softmac)) { |
| 869 | /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */ |
| 870 | cs->control &= ~ZD_CS_RTS; |
| 871 | cs->control |= ZD_CS_SELF_CTS; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | /* FIXME: Management frame? */ |
| 875 | } |
| 876 | |
| 877 | static int fill_ctrlset(struct zd_mac *mac, |
| 878 | struct ieee80211_txb *txb, |
| 879 | int frag_num) |
| 880 | { |
| 881 | int r; |
| 882 | struct sk_buff *skb = txb->fragments[frag_num]; |
| 883 | struct ieee80211_hdr_4addr *hdr = |
| 884 | (struct ieee80211_hdr_4addr *) skb->data; |
| 885 | unsigned int frag_len = skb->len + IEEE80211_FCS_LEN; |
| 886 | unsigned int next_frag_len; |
| 887 | unsigned int packet_length; |
| 888 | struct zd_ctrlset *cs = (struct zd_ctrlset *) |
| 889 | skb_push(skb, sizeof(struct zd_ctrlset)); |
| 890 | |
| 891 | if (frag_num+1 < txb->nr_frags) { |
| 892 | next_frag_len = txb->fragments[frag_num+1]->len + |
| 893 | IEEE80211_FCS_LEN; |
| 894 | } else { |
| 895 | next_frag_len = 0; |
| 896 | } |
| 897 | ZD_ASSERT(frag_len <= 0xffff); |
| 898 | ZD_ASSERT(next_frag_len <= 0xffff); |
| 899 | |
| 900 | cs_set_modulation(mac, cs, hdr); |
| 901 | |
| 902 | cs->tx_length = cpu_to_le16(frag_len); |
| 903 | |
| 904 | cs_set_control(mac, cs, hdr); |
| 905 | |
| 906 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; |
| 907 | ZD_ASSERT(packet_length <= 0xffff); |
| 908 | /* ZD1211B: Computing the length difference this way, gives us |
| 909 | * flexibility to compute the packet length. |
| 910 | */ |
Daniel Drake | 74553ae | 2007-07-01 18:22:32 +0100 | [diff] [blame] | 911 | cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 912 | packet_length - frag_len : packet_length); |
| 913 | |
| 914 | /* |
| 915 | * CURRENT LENGTH: |
| 916 | * - transmit frame length in microseconds |
| 917 | * - seems to be derived from frame length |
| 918 | * - see Cal_Us_Service() in zdinlinef.h |
| 919 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 |
| 920 | * - bTxBurstEnable is never set in the vendor driver |
| 921 | * |
| 922 | * SERVICE: |
| 923 | * - "for PLCP configuration" |
| 924 | * - always 0 except in some situations at 802.11b 11M |
| 925 | * - see line 53 of zdinlinef.h |
| 926 | */ |
| 927 | cs->service = 0; |
| 928 | r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation), |
| 929 | le16_to_cpu(cs->tx_length)); |
| 930 | if (r < 0) |
| 931 | return r; |
| 932 | cs->current_length = cpu_to_le16(r); |
| 933 | |
| 934 | if (next_frag_len == 0) { |
| 935 | cs->next_frame_length = 0; |
| 936 | } else { |
| 937 | r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation), |
| 938 | next_frag_len); |
| 939 | if (r < 0) |
| 940 | return r; |
| 941 | cs->next_frame_length = cpu_to_le16(r); |
| 942 | } |
| 943 | |
| 944 | return 0; |
| 945 | } |
| 946 | |
| 947 | static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri) |
| 948 | { |
| 949 | int i, r; |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 950 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 951 | |
| 952 | for (i = 0; i < txb->nr_frags; i++) { |
| 953 | struct sk_buff *skb = txb->fragments[i]; |
| 954 | |
| 955 | r = fill_ctrlset(mac, txb, i); |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 956 | if (r) { |
| 957 | ieee->stats.tx_dropped++; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 958 | return r; |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 959 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 960 | r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len); |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 961 | if (r) { |
| 962 | ieee->stats.tx_dropped++; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 963 | return r; |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 964 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | /* FIXME: shouldn't this be handled by the upper layers? */ |
| 968 | mac->netdev->trans_start = jiffies; |
| 969 | |
| 970 | ieee80211_txb_free(txb); |
| 971 | return 0; |
| 972 | } |
| 973 | |
| 974 | struct zd_rt_hdr { |
| 975 | struct ieee80211_radiotap_header rt_hdr; |
| 976 | u8 rt_flags; |
Ulrich Kunitz | 99f65f2 | 2006-08-01 23:43:30 +0200 | [diff] [blame] | 977 | u8 rt_rate; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 978 | u16 rt_channel; |
| 979 | u16 rt_chbitmask; |
John W. Linville | a88556a | 2006-11-28 14:16:37 -0500 | [diff] [blame] | 980 | } __attribute__((packed)); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 981 | |
| 982 | static void fill_rt_header(void *buffer, struct zd_mac *mac, |
| 983 | const struct ieee80211_rx_stats *stats, |
| 984 | const struct rx_status *status) |
| 985 | { |
| 986 | struct zd_rt_hdr *hdr = buffer; |
| 987 | |
| 988 | hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION; |
| 989 | hdr->rt_hdr.it_pad = 0; |
| 990 | hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr)); |
| 991 | hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | |
| 992 | (1 << IEEE80211_RADIOTAP_CHANNEL) | |
| 993 | (1 << IEEE80211_RADIOTAP_RATE)); |
| 994 | |
| 995 | hdr->rt_flags = 0; |
| 996 | if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256)) |
| 997 | hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP; |
| 998 | |
Ulrich Kunitz | 99f65f2 | 2006-08-01 23:43:30 +0200 | [diff] [blame] | 999 | hdr->rt_rate = stats->rate / 5; |
| 1000 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1001 | /* FIXME: 802.11a */ |
| 1002 | hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz( |
| 1003 | _zd_chip_get_channel(&mac->chip))); |
| 1004 | hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ | |
| 1005 | ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) == |
| 1006 | ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK)); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | /* Returns 1 if the data packet is for us and 0 otherwise. */ |
| 1010 | static int is_data_packet_for_us(struct ieee80211_device *ieee, |
| 1011 | struct ieee80211_hdr_4addr *hdr) |
| 1012 | { |
| 1013 | struct net_device *netdev = ieee->dev; |
| 1014 | u16 fc = le16_to_cpu(hdr->frame_ctl); |
| 1015 | |
| 1016 | ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA); |
| 1017 | |
| 1018 | switch (ieee->iw_mode) { |
| 1019 | case IW_MODE_ADHOC: |
| 1020 | if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 || |
Daniel Drake | 832855d | 2007-03-11 19:53:40 +0000 | [diff] [blame] | 1021 | compare_ether_addr(hdr->addr3, ieee->bssid) != 0) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1022 | return 0; |
| 1023 | break; |
| 1024 | case IW_MODE_AUTO: |
| 1025 | case IW_MODE_INFRA: |
| 1026 | if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != |
| 1027 | IEEE80211_FCTL_FROMDS || |
Daniel Drake | 832855d | 2007-03-11 19:53:40 +0000 | [diff] [blame] | 1028 | compare_ether_addr(hdr->addr2, ieee->bssid) != 0) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1029 | return 0; |
| 1030 | break; |
| 1031 | default: |
| 1032 | ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR); |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
Daniel Drake | 832855d | 2007-03-11 19:53:40 +0000 | [diff] [blame] | 1036 | return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 || |
Ulrich Kunitz | 9cdac96 | 2006-12-01 00:58:07 +0000 | [diff] [blame] | 1037 | (is_multicast_ether_addr(hdr->addr1) && |
Daniel Drake | 832855d | 2007-03-11 19:53:40 +0000 | [diff] [blame] | 1038 | compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) || |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1039 | (netdev->flags & IFF_PROMISC); |
| 1040 | } |
| 1041 | |
Ulrich Kunitz | 741fec5 | 2006-11-22 00:05:53 +0000 | [diff] [blame] | 1042 | /* Filters received packets. The function returns 1 if the packet should be |
| 1043 | * forwarded to ieee80211_rx(). If the packet should be ignored the function |
| 1044 | * returns 0. If an invalid packet is found the function returns -EINVAL. |
| 1045 | * |
| 1046 | * The function calls ieee80211_rx_mgt() directly. |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1047 | * |
| 1048 | * It has been based on ieee80211_rx_any. |
| 1049 | */ |
| 1050 | static int filter_rx(struct ieee80211_device *ieee, |
| 1051 | const u8 *buffer, unsigned int length, |
| 1052 | struct ieee80211_rx_stats *stats) |
| 1053 | { |
| 1054 | struct ieee80211_hdr_4addr *hdr; |
| 1055 | u16 fc; |
| 1056 | |
| 1057 | if (ieee->iw_mode == IW_MODE_MONITOR) |
| 1058 | return 1; |
| 1059 | |
| 1060 | hdr = (struct ieee80211_hdr_4addr *)buffer; |
| 1061 | fc = le16_to_cpu(hdr->frame_ctl); |
| 1062 | if ((fc & IEEE80211_FCTL_VERS) != 0) |
| 1063 | return -EINVAL; |
| 1064 | |
| 1065 | switch (WLAN_FC_GET_TYPE(fc)) { |
| 1066 | case IEEE80211_FTYPE_MGMT: |
| 1067 | if (length < sizeof(struct ieee80211_hdr_3addr)) |
| 1068 | return -EINVAL; |
| 1069 | ieee80211_rx_mgt(ieee, hdr, stats); |
| 1070 | return 0; |
| 1071 | case IEEE80211_FTYPE_CTL: |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1072 | return 0; |
| 1073 | case IEEE80211_FTYPE_DATA: |
Ulrich Kunitz | 741fec5 | 2006-11-22 00:05:53 +0000 | [diff] [blame] | 1074 | /* Ignore invalid short buffers */ |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1075 | if (length < sizeof(struct ieee80211_hdr_3addr)) |
| 1076 | return -EINVAL; |
| 1077 | return is_data_packet_for_us(ieee, hdr); |
| 1078 | } |
| 1079 | |
| 1080 | return -EINVAL; |
| 1081 | } |
| 1082 | |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1083 | static void update_qual_rssi(struct zd_mac *mac, |
| 1084 | const u8 *buffer, unsigned int length, |
| 1085 | u8 qual_percent, u8 rssi_percent) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1086 | { |
| 1087 | unsigned long flags; |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1088 | struct ieee80211_hdr_3addr *hdr; |
| 1089 | int i; |
| 1090 | |
| 1091 | hdr = (struct ieee80211_hdr_3addr *)buffer; |
| 1092 | if (length < offsetof(struct ieee80211_hdr_3addr, addr3)) |
| 1093 | return; |
Daniel Drake | 832855d | 2007-03-11 19:53:40 +0000 | [diff] [blame] | 1094 | if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0) |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1095 | return; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1096 | |
| 1097 | spin_lock_irqsave(&mac->lock, flags); |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1098 | i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE; |
| 1099 | mac->qual_buffer[i] = qual_percent; |
| 1100 | mac->rssi_buffer[i] = rssi_percent; |
| 1101 | mac->stats_count++; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1102 | spin_unlock_irqrestore(&mac->lock, flags); |
| 1103 | } |
| 1104 | |
| 1105 | static int fill_rx_stats(struct ieee80211_rx_stats *stats, |
| 1106 | const struct rx_status **pstatus, |
| 1107 | struct zd_mac *mac, |
| 1108 | const u8 *buffer, unsigned int length) |
| 1109 | { |
| 1110 | const struct rx_status *status; |
| 1111 | |
| 1112 | *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status)); |
| 1113 | if (status->frame_status & ZD_RX_ERROR) { |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1114 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| 1115 | ieee->stats.rx_errors++; |
| 1116 | if (status->frame_status & ZD_RX_TIMEOUT_ERROR) |
| 1117 | ieee->stats.rx_missed_errors++; |
| 1118 | else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR) |
| 1119 | ieee->stats.rx_fifo_errors++; |
| 1120 | else if (status->frame_status & ZD_RX_DECRYPTION_ERROR) |
| 1121 | ieee->ieee_stats.rx_discards_undecryptable++; |
| 1122 | else if (status->frame_status & ZD_RX_CRC32_ERROR) { |
| 1123 | ieee->stats.rx_crc_errors++; |
| 1124 | ieee->ieee_stats.rx_fcs_errors++; |
| 1125 | } |
| 1126 | else if (status->frame_status & ZD_RX_CRC16_ERROR) |
| 1127 | ieee->stats.rx_crc_errors++; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1128 | return -EINVAL; |
| 1129 | } |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1130 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1131 | memset(stats, 0, sizeof(struct ieee80211_rx_stats)); |
| 1132 | stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN + |
| 1133 | + sizeof(struct rx_status)); |
| 1134 | /* FIXME: 802.11a */ |
| 1135 | stats->freq = IEEE80211_24GHZ_BAND; |
| 1136 | stats->received_channel = _zd_chip_get_channel(&mac->chip); |
| 1137 | stats->rssi = zd_rx_strength_percent(status->signal_strength); |
| 1138 | stats->signal = zd_rx_qual_percent(buffer, |
| 1139 | length - sizeof(struct rx_status), |
| 1140 | status); |
| 1141 | stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL; |
| 1142 | stats->rate = zd_rx_rate(buffer, status); |
| 1143 | if (stats->rate) |
| 1144 | stats->mask |= IEEE80211_STATMASK_RATE; |
| 1145 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1146 | return 0; |
| 1147 | } |
| 1148 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1149 | static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb) |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1150 | { |
| 1151 | int r; |
| 1152 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| 1153 | struct ieee80211_rx_stats stats; |
| 1154 | const struct rx_status *status; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1155 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1156 | if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN + |
| 1157 | IEEE80211_FCS_LEN + sizeof(struct rx_status)) |
| 1158 | { |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1159 | ieee->stats.rx_errors++; |
| 1160 | ieee->stats.rx_length_errors++; |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1161 | goto free_skb; |
| 1162 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1163 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1164 | r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len); |
| 1165 | if (r) { |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1166 | /* Only packets with rx errors are included here. |
| 1167 | * The error stats have already been set in fill_rx_stats. |
| 1168 | */ |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1169 | goto free_skb; |
| 1170 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1171 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1172 | __skb_pull(skb, ZD_PLCP_HEADER_SIZE); |
| 1173 | __skb_trim(skb, skb->len - |
| 1174 | (IEEE80211_FCS_LEN + sizeof(struct rx_status))); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1175 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1176 | update_qual_rssi(mac, skb->data, skb->len, stats.signal, |
| 1177 | status->signal_strength); |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1178 | |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1179 | r = filter_rx(ieee, skb->data, skb->len, &stats); |
| 1180 | if (r <= 0) { |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1181 | if (r < 0) { |
| 1182 | ieee->stats.rx_errors++; |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1183 | dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n"); |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1184 | } |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1185 | goto free_skb; |
| 1186 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1187 | |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1188 | if (ieee->iw_mode == IW_MODE_MONITOR) |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1189 | fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac, |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1190 | &stats, status); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1191 | |
| 1192 | r = ieee80211_rx(ieee, skb, &stats); |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1193 | if (r) |
| 1194 | return; |
| 1195 | free_skb: |
| 1196 | /* We are always in a soft irq. */ |
| 1197 | dev_kfree_skb(skb); |
| 1198 | } |
| 1199 | |
| 1200 | static void do_rx(unsigned long mac_ptr) |
| 1201 | { |
| 1202 | struct zd_mac *mac = (struct zd_mac *)mac_ptr; |
| 1203 | struct sk_buff *skb; |
| 1204 | |
| 1205 | while ((skb = skb_dequeue(&mac->rx_queue)) != NULL) |
| 1206 | zd_mac_rx(mac, skb); |
| 1207 | } |
| 1208 | |
| 1209 | int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length) |
| 1210 | { |
| 1211 | struct sk_buff *skb; |
| 1212 | |
| 1213 | skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length); |
| 1214 | if (!skb) { |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1215 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1216 | dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n"); |
Ulrich Kunitz | 22d3405 | 2007-01-29 01:00:03 +0000 | [diff] [blame] | 1217 | ieee->stats.rx_dropped++; |
Ulrich Kunitz | 4d1feab | 2006-12-10 11:13:12 -0800 | [diff] [blame] | 1218 | return -ENOMEM; |
| 1219 | } |
| 1220 | skb_reserve(skb, sizeof(struct zd_rt_hdr)); |
| 1221 | memcpy(__skb_put(skb, length), buffer, length); |
| 1222 | skb_queue_tail(&mac->rx_queue, skb); |
| 1223 | tasklet_schedule(&mac->rx_tasklet); |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev, |
| 1228 | int pri) |
| 1229 | { |
| 1230 | return zd_mac_tx(zd_netdev_mac(netdev), txb, pri); |
| 1231 | } |
| 1232 | |
| 1233 | static void set_security(struct net_device *netdev, |
| 1234 | struct ieee80211_security *sec) |
| 1235 | { |
| 1236 | struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev); |
| 1237 | struct ieee80211_security *secinfo = &ieee->sec; |
| 1238 | int keyidx; |
| 1239 | |
| 1240 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n"); |
| 1241 | |
| 1242 | for (keyidx = 0; keyidx<WEP_KEYS; keyidx++) |
| 1243 | if (sec->flags & (1<<keyidx)) { |
| 1244 | secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx]; |
| 1245 | secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx]; |
| 1246 | memcpy(secinfo->keys[keyidx], sec->keys[keyidx], |
| 1247 | SCM_KEY_LEN); |
| 1248 | } |
| 1249 | |
| 1250 | if (sec->flags & SEC_ACTIVE_KEY) { |
| 1251 | secinfo->active_key = sec->active_key; |
| 1252 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), |
| 1253 | " .active_key = %d\n", sec->active_key); |
| 1254 | } |
| 1255 | if (sec->flags & SEC_UNICAST_GROUP) { |
| 1256 | secinfo->unicast_uses_group = sec->unicast_uses_group; |
| 1257 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), |
| 1258 | " .unicast_uses_group = %d\n", |
| 1259 | sec->unicast_uses_group); |
| 1260 | } |
| 1261 | if (sec->flags & SEC_LEVEL) { |
| 1262 | secinfo->level = sec->level; |
| 1263 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), |
| 1264 | " .level = %d\n", sec->level); |
| 1265 | } |
| 1266 | if (sec->flags & SEC_ENABLED) { |
| 1267 | secinfo->enabled = sec->enabled; |
| 1268 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), |
| 1269 | " .enabled = %d\n", sec->enabled); |
| 1270 | } |
| 1271 | if (sec->flags & SEC_ENCRYPT) { |
| 1272 | secinfo->encrypt = sec->encrypt; |
| 1273 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), |
| 1274 | " .encrypt = %d\n", sec->encrypt); |
| 1275 | } |
| 1276 | if (sec->flags & SEC_AUTH_MODE) { |
| 1277 | secinfo->auth_mode = sec->auth_mode; |
| 1278 | dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), |
| 1279 | " .auth_mode = %d\n", sec->auth_mode); |
| 1280 | } |
| 1281 | } |
| 1282 | |
| 1283 | static void ieee_init(struct ieee80211_device *ieee) |
| 1284 | { |
| 1285 | ieee->mode = IEEE_B | IEEE_G; |
| 1286 | ieee->freq_band = IEEE80211_24GHZ_BAND; |
| 1287 | ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION; |
| 1288 | ieee->tx_headroom = sizeof(struct zd_ctrlset); |
| 1289 | ieee->set_security = set_security; |
| 1290 | ieee->hard_start_xmit = netdev_tx; |
| 1291 | |
| 1292 | /* Software encryption/decryption for now */ |
| 1293 | ieee->host_build_iv = 0; |
| 1294 | ieee->host_encrypt = 1; |
| 1295 | ieee->host_decrypt = 1; |
| 1296 | |
| 1297 | /* FIXME: default to managed mode, until ieee80211 and zd1211rw can |
| 1298 | * correctly support AUTO */ |
| 1299 | ieee->iw_mode = IW_MODE_INFRA; |
| 1300 | } |
| 1301 | |
| 1302 | static void softmac_init(struct ieee80211softmac_device *sm) |
| 1303 | { |
| 1304 | sm->set_channel = set_channel; |
Daniel Drake | b1382ed | 2006-11-22 00:06:48 +0000 | [diff] [blame] | 1305 | sm->bssinfo_change = bssinfo_change; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1306 | } |
| 1307 | |
| 1308 | struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev) |
| 1309 | { |
| 1310 | struct zd_mac *mac = zd_netdev_mac(ndev); |
| 1311 | struct iw_statistics *iw_stats = &mac->iw_stats; |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1312 | unsigned int i, count, qual_total, rssi_total; |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1313 | |
| 1314 | memset(iw_stats, 0, sizeof(struct iw_statistics)); |
| 1315 | /* We are not setting the status, because ieee->state is not updated |
| 1316 | * at all and this driver doesn't track authentication state. |
| 1317 | */ |
| 1318 | spin_lock_irq(&mac->lock); |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1319 | count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ? |
| 1320 | mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE; |
| 1321 | qual_total = rssi_total = 0; |
| 1322 | for (i = 0; i < count; i++) { |
| 1323 | qual_total += mac->qual_buffer[i]; |
| 1324 | rssi_total += mac->rssi_buffer[i]; |
| 1325 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1326 | spin_unlock_irq(&mac->lock); |
Ulrich Kunitz | db888ae | 2006-08-29 23:50:29 +0100 | [diff] [blame] | 1327 | iw_stats->qual.updated = IW_QUAL_NOISE_INVALID; |
| 1328 | if (count > 0) { |
| 1329 | iw_stats->qual.qual = qual_total / count; |
| 1330 | iw_stats->qual.level = rssi_total / count; |
| 1331 | iw_stats->qual.updated |= |
| 1332 | IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED; |
| 1333 | } else { |
| 1334 | iw_stats->qual.updated |= |
| 1335 | IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID; |
| 1336 | } |
Daniel Drake | e85d091 | 2006-06-02 17:11:32 +0100 | [diff] [blame] | 1337 | /* TODO: update counter */ |
| 1338 | return iw_stats; |
| 1339 | } |
| 1340 | |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 1341 | #define LINK_LED_WORK_DELAY HZ |
| 1342 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1343 | static void link_led_handler(struct work_struct *work) |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 1344 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1345 | struct zd_mac *mac = |
| 1346 | container_of(work, struct zd_mac, housekeeping.link_led_work.work); |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 1347 | struct zd_chip *chip = &mac->chip; |
| 1348 | struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev); |
| 1349 | int is_associated; |
| 1350 | int r; |
| 1351 | |
| 1352 | spin_lock_irq(&mac->lock); |
John W. Linville | 41072a1 | 2006-10-17 13:47:40 -0400 | [diff] [blame] | 1353 | is_associated = sm->associnfo.associated != 0; |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 1354 | spin_unlock_irq(&mac->lock); |
| 1355 | |
| 1356 | r = zd_chip_control_leds(chip, |
| 1357 | is_associated ? LED_ASSOCIATED : LED_SCANNING); |
| 1358 | if (r) |
| 1359 | dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); |
| 1360 | |
| 1361 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, |
| 1362 | LINK_LED_WORK_DELAY); |
| 1363 | } |
| 1364 | |
| 1365 | static void housekeeping_init(struct zd_mac *mac) |
| 1366 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1367 | INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); |
Ulrich Kunitz | 583afd1e | 2006-09-13 02:42:38 +0100 | [diff] [blame] | 1368 | } |
| 1369 | |
| 1370 | static void housekeeping_enable(struct zd_mac *mac) |
| 1371 | { |
| 1372 | dev_dbg_f(zd_mac_dev(mac), "\n"); |
| 1373 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, |
| 1374 | 0); |
| 1375 | } |
| 1376 | |
| 1377 | static void housekeeping_disable(struct zd_mac *mac) |
| 1378 | { |
| 1379 | dev_dbg_f(zd_mac_dev(mac), "\n"); |
| 1380 | cancel_rearming_delayed_workqueue(zd_workqueue, |
| 1381 | &mac->housekeeping.link_led_work); |
| 1382 | zd_chip_control_leds(&mac->chip, LED_OFF); |
| 1383 | } |