1 /* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c)
3 * A driver for Hermes or Prism 2 chipset based PCMCIA wireless
4 * adaptors, with Lucent/Agere, Intersil or Symbol firmware.
6 * Current maintainers (as of 29 September 2003) are:
7 * Pavel Roskin <proski AT gnu.org>
8 * and David Gibson <hermes AT gibson.dropbear.id.au>
10 * (C) Copyright David Gibson, IBM Corporation 2001-2003.
11 * Copyright (C) 2000 David Gibson, Linuxcare Australia.
12 * With some help from :
13 * Copyright (C) 2001 Jean Tourrilhes, HP Labs
14 * Copyright (C) 2001 Benjamin Herrenschmidt
16 * Based on dummy_cs.c 1.27 2000/06/12 21:27:25
18 * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy
19 * AT fasta.fh-dortmund.de>
20 * http://www.stud.fh-dortmund.de/~andy/wvlan/
22 * The contents of this file are subject to the Mozilla Public License
23 * Version 1.1 (the "License"); you may not use this file except in
24 * compliance with the License. You may obtain a copy of the License
25 * at http://www.mozilla.org/MPL/
27 * Software distributed under the License is distributed on an "AS IS"
28 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
29 * the License for the specific language governing rights and
30 * limitations under the License.
32 * The initial developer of the original code is David A. Hinds
33 * <dahinds AT users.sourceforge.net>. Portions created by David
34 * A. Hinds are Copyright (C) 1999 David A. Hinds. All Rights
37 * Alternatively, the contents of this file may be used under the
38 * terms of the GNU General Public License version 2 (the "GPL"), in
39 * which case the provisions of the GPL are applicable instead of the
40 * above. If you wish to allow the use of your version of this file
41 * only under the terms of the GPL and not to allow others to use your
42 * version of this file under the MPL, indicate your decision by
43 * deleting the provisions above and replace them with the notice and
44 * other provisions required by the GPL. If you do not delete the
45 * provisions above, a recipient may use your version of this file
46 * under either the MPL or the GPL. */
50 * o Handle de-encapsulation within network layer, provide 802.11
51 * headers (patch from Thomas 'Dent' Mirlacher)
52 * o Fix possible races in SPY handling.
53 * o Disconnect wireless extensions from fundamental configuration.
54 * o (maybe) Software WEP support (patch from Stano Meduna).
55 * o (maybe) Use multiple Tx buffers - driver handling queue
56 * rather than firmware.
59 /* Locking and synchronization:
61 * The basic principle is that everything is serialized through a
62 * single spinlock, priv->lock. The lock is used in user, bh and irq
63 * context, so when taken outside hardirq context it should always be
64 * taken with interrupts disabled. The lock protects both the
65 * hardware and the struct orinoco_private.
67 * Another flag, priv->hw_unavailable indicates that the hardware is
68 * unavailable for an extended period of time (e.g. suspended, or in
69 * the middle of a hard reset). This flag is protected by the
70 * spinlock. All code which touches the hardware should check the
71 * flag after taking the lock, and if it is set, give up on whatever
72 * they are doing and drop the lock again. The orinoco_lock()
73 * function handles this (it unlocks and returns -EBUSY if
74 * hw_unavailable is non-zero).
77 #define DRIVER_NAME "orinoco"
79 #include <linux/module.h>
80 #include <linux/kernel.h>
81 #include <linux/slab.h>
82 #include <linux/init.h>
83 #include <linux/delay.h>
84 #include <linux/device.h>
85 #include <linux/netdevice.h>
86 #include <linux/etherdevice.h>
87 #include <linux/suspend.h>
88 #include <linux/if_arp.h>
89 #include <linux/wireless.h>
90 #include <linux/ieee80211.h>
91 #include <net/iw_handler.h>
92 #include <net/cfg80211.h>
94 #include "hermes_rid.h"
95 #include "hermes_dld.h"
106 /********************************************************************/
107 /* Module information */
108 /********************************************************************/
110 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & "
111 "David Gibson <hermes@gibson.dropbear.id.au>");
112 MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based "
113 "and similar wireless cards");
114 MODULE_LICENSE("Dual MPL/GPL");
116 /* Level of debugging. Used in the macros in orinoco.h */
118 int orinoco_debug = ORINOCO_DEBUG;
119 EXPORT_SYMBOL(orinoco_debug);
120 module_param(orinoco_debug, int, 0644);
121 MODULE_PARM_DESC(orinoco_debug, "Debug level");
124 static int suppress_linkstatus; /* = 0 */
125 module_param(suppress_linkstatus, bool, 0644);
126 MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
128 static int ignore_disconnect; /* = 0 */
129 module_param(ignore_disconnect, int, 0644);
130 MODULE_PARM_DESC(ignore_disconnect,
131 "Don't report lost link to the network layer");
133 int force_monitor; /* = 0 */
134 module_param(force_monitor, int, 0644);
135 MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");
137 /********************************************************************/
138 /* Internal constants */
139 /********************************************************************/
141 /* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
142 static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
143 #define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2)
145 #define ORINOCO_MIN_MTU 256
146 #define ORINOCO_MAX_MTU (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD)
148 #define MAX_IRQLOOPS_PER_IRQ 10
149 #define MAX_IRQLOOPS_PER_JIFFY (20000/HZ) /* Based on a guestimate of
150 * how many events the
152 * legitimately generate */
154 #define DUMMY_FID 0xFFFF
156 /*#define MAX_MULTICAST(priv) (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \
157 HERMES_MAX_MULTICAST : 0)*/
158 #define MAX_MULTICAST(priv) (HERMES_MAX_MULTICAST)
160 #define ORINOCO_INTEN (HERMES_EV_RX | HERMES_EV_ALLOC \
161 | HERMES_EV_TX | HERMES_EV_TXEXC \
162 | HERMES_EV_WTERR | HERMES_EV_INFO \
165 /********************************************************************/
167 /********************************************************************/
169 /* Beginning of the Tx descriptor, used in TxExc handling */
170 struct hermes_txexc_data {
171 struct hermes_tx_descriptor desc;
177 /* Rx frame header except compatibility 802.3 header */
178 struct hermes_rx_descriptor {
201 struct orinoco_rx_data {
202 struct hermes_rx_descriptor *desc;
204 struct list_head list;
207 struct orinoco_scan_data {
211 struct list_head list;
214 /********************************************************************/
215 /* Function prototypes */
216 /********************************************************************/
218 static int __orinoco_set_multicast_list(struct net_device *dev);
219 static int __orinoco_up(struct orinoco_private *priv);
220 static int __orinoco_down(struct orinoco_private *priv);
221 static int __orinoco_commit(struct orinoco_private *priv);
223 /********************************************************************/
224 /* Internal helper functions */
225 /********************************************************************/
227 void set_port_type(struct orinoco_private *priv)
229 switch (priv->iw_mode) {
230 case NL80211_IFTYPE_STATION:
232 priv->createibss = 0;
234 case NL80211_IFTYPE_ADHOC:
235 if (priv->prefer_port3) {
237 priv->createibss = 0;
239 priv->port_type = priv->ibss_port;
240 priv->createibss = 1;
243 case NL80211_IFTYPE_MONITOR:
245 priv->createibss = 0;
248 printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
253 /********************************************************************/
255 /********************************************************************/
257 int orinoco_open(struct net_device *dev)
259 struct orinoco_private *priv = ndev_priv(dev);
263 if (orinoco_lock(priv, &flags) != 0)
266 err = __orinoco_up(priv);
271 orinoco_unlock(priv, &flags);
275 EXPORT_SYMBOL(orinoco_open);
277 int orinoco_stop(struct net_device *dev)
279 struct orinoco_private *priv = ndev_priv(dev);
282 /* We mustn't use orinoco_lock() here, because we need to be
283 able to close the interface even if hw_unavailable is set
284 (e.g. as we're released after a PC Card removal) */
285 orinoco_lock_irq(priv);
289 err = __orinoco_down(priv);
291 orinoco_unlock_irq(priv);
295 EXPORT_SYMBOL(orinoco_stop);
297 struct net_device_stats *orinoco_get_stats(struct net_device *dev)
299 struct orinoco_private *priv = ndev_priv(dev);
303 EXPORT_SYMBOL(orinoco_get_stats);
305 void orinoco_set_multicast_list(struct net_device *dev)
307 struct orinoco_private *priv = ndev_priv(dev);
310 if (orinoco_lock(priv, &flags) != 0) {
311 printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
312 "called when hw_unavailable\n", dev->name);
316 __orinoco_set_multicast_list(dev);
317 orinoco_unlock(priv, &flags);
319 EXPORT_SYMBOL(orinoco_set_multicast_list);
321 int orinoco_change_mtu(struct net_device *dev, int new_mtu)
323 struct orinoco_private *priv = ndev_priv(dev);
325 if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU))
328 /* MTU + encapsulation + header length */
329 if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) >
330 (priv->nicbuf_size - ETH_HLEN))
337 EXPORT_SYMBOL(orinoco_change_mtu);
339 /********************************************************************/
341 /********************************************************************/
343 /* Add encapsulation and MIC to the existing SKB.
344 * The main xmit routine will then send the whole lot to the card.
345 * Need 8 bytes headroom
346 * Need 8 bytes tailroom
348 * With encapsulated ethernet II frame
350 * 803.3 header (14 bytes)
353 * 803.3 header (14 bytes) len[2]
354 * dst[6] 803.2 header (8 bytes)
356 * len[2] <- leave alone -> len[2]
357 * -------- -------- <-- 0
365 * returns 0 on success, -ENOMEM on error.
367 int orinoco_process_xmit_skb(struct sk_buff *skb,
368 struct net_device *dev,
369 struct orinoco_private *priv,
373 struct orinoco_tkip_key *key;
377 key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key;
379 do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) &&
383 *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
386 eh = (struct ethhdr *)skb->data;
388 /* Encapsulate Ethernet-II frames */
389 if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
390 struct header_struct {
391 struct ethhdr eth; /* 802.3 header */
392 u8 encap[6]; /* 802.2 header */
394 int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN);
396 if (skb_headroom(skb) < ENCAPS_OVERHEAD) {
399 "%s: Not enough headroom for 802.2 headers %d\n",
400 dev->name, skb_headroom(skb));
404 /* Fill in new header */
405 memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
406 hdr.eth.h_proto = htons(len);
407 memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));
409 /* Make room for the new header, and copy it in */
410 eh = (struct ethhdr *) skb_push(skb, ENCAPS_OVERHEAD);
411 memcpy(eh, &hdr, sizeof(hdr));
414 /* Calculate Michael MIC */
416 size_t len = skb->len - ETH_HLEN;
417 u8 *mic = &mic_buf[0];
419 /* Have to write to an even address, so copy the spare
422 *mic = skb->data[skb->len - 1];
426 orinoco_mic(priv->tx_tfm_mic, key->tx_mic,
427 eh->h_dest, eh->h_source, 0 /* priority */,
428 skb->data + ETH_HLEN,
434 EXPORT_SYMBOL(orinoco_process_xmit_skb);
436 static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
438 struct orinoco_private *priv = ndev_priv(dev);
439 struct net_device_stats *stats = &priv->stats;
440 hermes_t *hw = &priv->hw;
442 u16 txfid = priv->txfid;
445 u8 mic_buf[MICHAEL_MIC_LEN+1];
447 if (!netif_running(dev)) {
448 printk(KERN_ERR "%s: Tx on stopped device!\n",
450 return NETDEV_TX_BUSY;
453 if (netif_queue_stopped(dev)) {
454 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
456 return NETDEV_TX_BUSY;
459 if (orinoco_lock(priv, &flags) != 0) {
460 printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n",
462 return NETDEV_TX_BUSY;
465 if (!netif_carrier_ok(dev) ||
466 (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
467 /* Oops, the firmware hasn't established a connection,
468 silently drop the packet (this seems to be the
473 /* Check packet length */
474 if (skb->len < ETH_HLEN)
477 tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX;
479 err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
484 if (priv->has_alt_txcntl) {
485 /* WPA enabled firmwares have tx_cntl at the end of
486 * the 802.11 header. So write zeroed descriptor and
487 * 802.11 header at the same time
489 char desc[HERMES_802_3_OFFSET];
490 __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET];
492 memset(&desc, 0, sizeof(desc));
494 *txcntl = cpu_to_le16(tx_control);
495 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
499 printk(KERN_ERR "%s: Error %d writing Tx "
500 "descriptor to BAP\n", dev->name, err);
504 struct hermes_tx_descriptor desc;
506 memset(&desc, 0, sizeof(desc));
508 desc.tx_control = cpu_to_le16(tx_control);
509 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
513 printk(KERN_ERR "%s: Error %d writing Tx "
514 "descriptor to BAP\n", dev->name, err);
518 /* Clear the 802.11 header and data length fields - some
519 * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
520 * if this isn't done. */
521 hermes_clear_words(hw, HERMES_DATA0,
522 HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);
525 err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len,
526 txfid, HERMES_802_3_OFFSET);
528 printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
533 if (tx_control & HERMES_TXCTRL_MIC) {
534 size_t offset = HERMES_802_3_OFFSET + skb->len;
535 size_t len = MICHAEL_MIC_LEN;
541 err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
544 printk(KERN_ERR "%s: Error %d writing MIC to BAP\n",
550 /* Finally, we actually initiate the send */
551 netif_stop_queue(dev);
553 err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
556 netif_start_queue(dev);
558 printk(KERN_ERR "%s: Error %d transmitting packet\n",
563 stats->tx_bytes += HERMES_802_3_OFFSET + skb->len;
571 orinoco_unlock(priv, &flags);
577 schedule_work(&priv->reset_work);
578 orinoco_unlock(priv, &flags);
579 return NETDEV_TX_BUSY;
582 static void __orinoco_ev_alloc(struct net_device *dev, hermes_t *hw)
584 struct orinoco_private *priv = ndev_priv(dev);
585 u16 fid = hermes_read_regn(hw, ALLOCFID);
587 if (fid != priv->txfid) {
588 if (fid != DUMMY_FID)
589 printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
594 hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
597 static void __orinoco_ev_tx(struct net_device *dev, hermes_t *hw)
599 struct orinoco_private *priv = ndev_priv(dev);
600 struct net_device_stats *stats = &priv->stats;
604 netif_wake_queue(dev);
606 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
609 static void __orinoco_ev_txexc(struct net_device *dev, hermes_t *hw)
611 struct orinoco_private *priv = ndev_priv(dev);
612 struct net_device_stats *stats = &priv->stats;
613 u16 fid = hermes_read_regn(hw, TXCOMPLFID);
615 struct hermes_txexc_data hdr;
618 if (fid == DUMMY_FID)
619 return; /* Nothing's really happened */
621 /* Read part of the frame header - we need status and addr1 */
622 err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr,
623 sizeof(struct hermes_txexc_data),
626 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
630 printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
631 "(FID=%04X error %d)\n",
632 dev->name, fid, err);
636 DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
639 /* We produce a TXDROP event only for retry or lifetime
640 * exceeded, because that's the only status that really mean
641 * that this particular node went away.
642 * Other errors means that *we* screwed up. - Jean II */
643 status = le16_to_cpu(hdr.desc.status);
644 if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
645 union iwreq_data wrqu;
647 /* Copy 802.11 dest address.
648 * We use the 802.11 header because the frame may
649 * not be 802.3 or may be mangled...
650 * In Ad-Hoc mode, it will be the node address.
651 * In managed mode, it will be most likely the AP addr
652 * User space will figure out how to convert it to
653 * whatever it needs (IP address or else).
655 memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
656 wrqu.addr.sa_family = ARPHRD_ETHER;
658 /* Send event to user space */
659 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
662 netif_wake_queue(dev);
665 void orinoco_tx_timeout(struct net_device *dev)
667 struct orinoco_private *priv = ndev_priv(dev);
668 struct net_device_stats *stats = &priv->stats;
669 struct hermes *hw = &priv->hw;
671 printk(KERN_WARNING "%s: Tx timeout! "
672 "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
673 dev->name, hermes_read_regn(hw, ALLOCFID),
674 hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));
678 schedule_work(&priv->reset_work);
680 EXPORT_SYMBOL(orinoco_tx_timeout);
682 /********************************************************************/
683 /* Rx path (data frames) */
684 /********************************************************************/
686 /* Does the frame have a SNAP header indicating it should be
687 * de-encapsulated to Ethernet-II? */
688 static inline int is_ethersnap(void *_hdr)
692 /* We de-encapsulate all packets which, a) have SNAP headers
693 * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
694 * and where b) the OUI of the SNAP header is 00:00:00 or
695 * 00:00:f8 - we need both because different APs appear to use
696 * different OUIs for some reason */
697 return (memcmp(hdr, &encaps_hdr, 5) == 0)
698 && ((hdr[5] == 0x00) || (hdr[5] == 0xf8));
701 static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
702 int level, int noise)
704 struct iw_quality wstats;
705 wstats.level = level - 0x95;
706 wstats.noise = noise - 0x95;
707 wstats.qual = (level > noise) ? (level - noise) : 0;
708 wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
709 /* Update spy records */
710 wireless_spy_update(dev, mac, &wstats);
713 static void orinoco_stat_gather(struct net_device *dev,
715 struct hermes_rx_descriptor *desc)
717 struct orinoco_private *priv = ndev_priv(dev);
719 /* Using spy support with lots of Rx packets, like in an
720 * infrastructure (AP), will really slow down everything, because
721 * the MAC address must be compared to each entry of the spy list.
722 * If the user really asks for it (set some address in the
723 * spy list), we do it, but he will pay the price.
724 * Note that to get here, you need both WIRELESS_SPY
725 * compiled in AND some addresses in the list !!!
727 /* Note : gcc will optimise the whole section away if
728 * WIRELESS_SPY is not defined... - Jean II */
729 if (SPY_NUMBER(priv)) {
730 orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN,
731 desc->signal, desc->silence);
736 * orinoco_rx_monitor - handle received monitor frames.
741 * desc rx descriptor of the frame
743 * Call context: interrupt
745 static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
746 struct hermes_rx_descriptor *desc)
748 u32 hdrlen = 30; /* return full header by default */
754 struct orinoco_private *priv = ndev_priv(dev);
755 struct net_device_stats *stats = &priv->stats;
756 hermes_t *hw = &priv->hw;
758 len = le16_to_cpu(desc->data_len);
760 /* Determine the size of the header and the data */
761 fc = le16_to_cpu(desc->frame_ctl);
762 switch (fc & IEEE80211_FCTL_FTYPE) {
763 case IEEE80211_FTYPE_DATA:
764 if ((fc & IEEE80211_FCTL_TODS)
765 && (fc & IEEE80211_FCTL_FROMDS))
771 case IEEE80211_FTYPE_MGMT:
775 case IEEE80211_FTYPE_CTL:
776 switch (fc & IEEE80211_FCTL_STYPE) {
777 case IEEE80211_STYPE_PSPOLL:
778 case IEEE80211_STYPE_RTS:
779 case IEEE80211_STYPE_CFEND:
780 case IEEE80211_STYPE_CFENDACK:
783 case IEEE80211_STYPE_CTS:
784 case IEEE80211_STYPE_ACK:
790 /* Unknown frame type */
794 /* sanity check the length */
795 if (datalen > IEEE80211_MAX_DATA_LEN + 12) {
796 printk(KERN_DEBUG "%s: oversized monitor frame, "
797 "data length = %d\n", dev->name, datalen);
798 stats->rx_length_errors++;
802 skb = dev_alloc_skb(hdrlen + datalen);
804 printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
809 /* Copy the 802.11 header to the skb */
810 memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
811 skb_reset_mac_header(skb);
813 /* If any, copy the data from the card to the skb */
815 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
816 ALIGN(datalen, 2), rxfid,
817 HERMES_802_2_OFFSET);
819 printk(KERN_ERR "%s: error %d reading monitor frame\n",
826 skb->ip_summed = CHECKSUM_NONE;
827 skb->pkt_type = PACKET_OTHERHOST;
828 skb->protocol = cpu_to_be16(ETH_P_802_2);
831 stats->rx_bytes += skb->len;
837 dev_kfree_skb_irq(skb);
843 void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
845 struct orinoco_private *priv = ndev_priv(dev);
846 struct net_device_stats *stats = &priv->stats;
847 struct iw_statistics *wstats = &priv->wstats;
848 struct sk_buff *skb = NULL;
851 struct hermes_rx_descriptor *desc;
852 struct orinoco_rx_data *rx_data;
855 desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
858 "%s: Can't allocate space for RX descriptor\n",
863 rxfid = hermes_read_regn(hw, RXFID);
865 err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc),
868 printk(KERN_ERR "%s: error %d reading Rx descriptor. "
869 "Frame dropped.\n", dev->name, err);
873 status = le16_to_cpu(desc->status);
875 if (status & HERMES_RXSTAT_BADCRC) {
876 DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
878 stats->rx_crc_errors++;
882 /* Handle frames in monitor mode */
883 if (priv->iw_mode == NL80211_IFTYPE_MONITOR) {
884 orinoco_rx_monitor(dev, rxfid, desc);
888 if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
889 DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
891 wstats->discard.code++;
895 length = le16_to_cpu(desc->data_len);
898 if (length < 3) { /* No for even an 802.2 LLC header */
899 /* At least on Symbol firmware with PCF we get quite a
900 lot of these legitimately - Poll frames with no
904 if (length > IEEE80211_MAX_DATA_LEN) {
905 printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
907 stats->rx_length_errors++;
911 /* Payload size does not include Michael MIC. Increase payload
912 * size to read it together with the data. */
913 if (status & HERMES_RXSTAT_MIC)
914 length += MICHAEL_MIC_LEN;
916 /* We need space for the packet data itself, plus an ethernet
917 header, plus 2 bytes so we can align the IP header on a
918 32bit boundary, plus 1 byte so we can read in odd length
919 packets from the card, which has an IO granularity of 16
921 skb = dev_alloc_skb(length+ETH_HLEN+2+1);
923 printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
928 /* We'll prepend the header, so reserve space for it. The worst
929 case is no decapsulation, when 802.3 header is prepended and
930 nothing is removed. 2 is for aligning the IP header. */
931 skb_reserve(skb, ETH_HLEN + 2);
933 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length),
934 ALIGN(length, 2), rxfid,
935 HERMES_802_2_OFFSET);
937 printk(KERN_ERR "%s: error %d reading frame. "
938 "Frame dropped.\n", dev->name, err);
942 /* Add desc and skb to rx queue */
943 rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC);
945 printk(KERN_WARNING "%s: Can't allocate RX packet\n",
949 rx_data->desc = desc;
951 list_add_tail(&rx_data->list, &priv->rx_list);
952 tasklet_schedule(&priv->rx_tasklet);
957 dev_kfree_skb_irq(skb);
964 EXPORT_SYMBOL(__orinoco_ev_rx);
966 static void orinoco_rx(struct net_device *dev,
967 struct hermes_rx_descriptor *desc,
970 struct orinoco_private *priv = ndev_priv(dev);
971 struct net_device_stats *stats = &priv->stats;
976 status = le16_to_cpu(desc->status);
977 length = le16_to_cpu(desc->data_len);
978 fc = le16_to_cpu(desc->frame_ctl);
980 /* Calculate and check MIC */
981 if (status & HERMES_RXSTAT_MIC) {
982 struct orinoco_tkip_key *key;
983 int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >>
984 HERMES_MIC_KEY_ID_SHIFT);
985 u8 mic[MICHAEL_MIC_LEN];
987 u8 *src = (fc & IEEE80211_FCTL_FROMDS) ?
988 desc->addr3 : desc->addr2;
990 /* Extract Michael MIC from payload */
991 rxmic = skb->data + skb->len - MICHAEL_MIC_LEN;
993 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
994 length -= MICHAEL_MIC_LEN;
996 key = (struct orinoco_tkip_key *) priv->keys[key_id].key;
999 printk(KERN_WARNING "%s: Received encrypted frame from "
1000 "%pM using key %i, but key is not installed\n",
1001 dev->name, src, key_id);
1005 orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src,
1006 0, /* priority or QoS? */
1007 skb->data, skb->len, &mic[0]);
1009 if (memcmp(mic, rxmic,
1011 union iwreq_data wrqu;
1012 struct iw_michaelmicfailure wxmic;
1014 printk(KERN_WARNING "%s: "
1015 "Invalid Michael MIC in data frame from %pM, "
1017 dev->name, src, key_id);
1019 /* TODO: update stats */
1021 /* Notify userspace */
1022 memset(&wxmic, 0, sizeof(wxmic));
1023 wxmic.flags = key_id & IW_MICFAILURE_KEY_ID;
1024 wxmic.flags |= (desc->addr1[0] & 1) ?
1025 IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE;
1026 wxmic.src_addr.sa_family = ARPHRD_ETHER;
1027 memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN);
1029 (void) orinoco_hw_get_tkip_iv(priv, key_id,
1032 memset(&wrqu, 0, sizeof(wrqu));
1033 wrqu.data.length = sizeof(wxmic);
1034 wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu,
1041 /* Handle decapsulation
1042 * In most cases, the firmware tell us about SNAP frames.
1043 * For some reason, the SNAP frames sent by LinkSys APs
1044 * are not properly recognised by most firmwares.
1045 * So, check ourselves */
1046 if (length >= ENCAPS_OVERHEAD &&
1047 (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
1048 ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
1049 is_ethersnap(skb->data))) {
1050 /* These indicate a SNAP within 802.2 LLC within
1051 802.11 frame which we'll need to de-encapsulate to
1052 the original EthernetII frame. */
1053 hdr = (struct ethhdr *)skb_push(skb,
1054 ETH_HLEN - ENCAPS_OVERHEAD);
1056 /* 802.3 frame - prepend 802.3 header as is */
1057 hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN);
1058 hdr->h_proto = htons(length);
1060 memcpy(hdr->h_dest, desc->addr1, ETH_ALEN);
1061 if (fc & IEEE80211_FCTL_FROMDS)
1062 memcpy(hdr->h_source, desc->addr3, ETH_ALEN);
1064 memcpy(hdr->h_source, desc->addr2, ETH_ALEN);
1066 skb->protocol = eth_type_trans(skb, dev);
1067 skb->ip_summed = CHECKSUM_NONE;
1068 if (fc & IEEE80211_FCTL_TODS)
1069 skb->pkt_type = PACKET_OTHERHOST;
1071 /* Process the wireless stats if needed */
1072 orinoco_stat_gather(dev, skb, desc);
1074 /* Pass the packet to the networking stack */
1076 stats->rx_packets++;
1077 stats->rx_bytes += length;
1084 stats->rx_dropped++;
1087 static void orinoco_rx_isr_tasklet(unsigned long data)
1089 struct orinoco_private *priv = (struct orinoco_private *) data;
1090 struct net_device *dev = priv->ndev;
1091 struct orinoco_rx_data *rx_data, *temp;
1092 struct hermes_rx_descriptor *desc;
1093 struct sk_buff *skb;
1094 unsigned long flags;
1096 /* orinoco_rx requires the driver lock, and we also need to
1097 * protect priv->rx_list, so just hold the lock over the
1100 * If orinoco_lock fails, we've unplugged the card. In this
1101 * case just abort. */
1102 if (orinoco_lock(priv, &flags) != 0)
1105 /* extract desc and skb from queue */
1106 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
1107 desc = rx_data->desc;
1109 list_del(&rx_data->list);
1112 orinoco_rx(dev, desc, skb);
1117 orinoco_unlock(priv, &flags);
1120 /********************************************************************/
1121 /* Rx path (info frames) */
1122 /********************************************************************/
1124 static void print_linkstatus(struct net_device *dev, u16 status)
1128 if (suppress_linkstatus)
1132 case HERMES_LINKSTATUS_NOT_CONNECTED:
1133 s = "Not Connected";
1135 case HERMES_LINKSTATUS_CONNECTED:
1138 case HERMES_LINKSTATUS_DISCONNECTED:
1141 case HERMES_LINKSTATUS_AP_CHANGE:
1144 case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
1145 s = "AP Out of Range";
1147 case HERMES_LINKSTATUS_AP_IN_RANGE:
1150 case HERMES_LINKSTATUS_ASSOC_FAILED:
1151 s = "Association Failed";
1157 printk(KERN_DEBUG "%s: New link status: %s (%04x)\n",
1158 dev->name, s, status);
1161 /* Search scan results for requested BSSID, join it if found */
1162 static void orinoco_join_ap(struct work_struct *work)
1164 struct orinoco_private *priv =
1165 container_of(work, struct orinoco_private, join_work);
1166 struct net_device *dev = priv->ndev;
1167 struct hermes *hw = &priv->hw;
1169 unsigned long flags;
1174 const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
1175 struct prism2_scan_apinfo *atom = NULL;
1181 /* Allocate buffer for scan results */
1182 buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
1186 if (orinoco_lock(priv, &flags) != 0)
1189 /* Sanity checks in case user changed something in the meantime */
1190 if (!priv->bssid_fixed)
1193 if (strlen(priv->desired_essid) == 0)
1196 /* Read scan results from the firmware */
1197 err = hw->ops->read_ltv(hw, USER_BAP,
1198 HERMES_RID_SCANRESULTSTABLE,
1199 MAX_SCAN_LEN, &len, buf);
1201 printk(KERN_ERR "%s: Cannot read scan results\n",
1206 len = HERMES_RECLEN_TO_BYTES(len);
1208 /* Go through the scan results looking for the channel of the AP
1209 * we were requested to join */
1210 for (; offset + atom_len <= len; offset += atom_len) {
1211 atom = (struct prism2_scan_apinfo *) (buf + offset);
1212 if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
1219 DEBUG(1, "%s: Requested AP not found in scan results\n",
1224 memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
1225 req.channel = atom->channel; /* both are little-endian */
1226 err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
1229 printk(KERN_ERR "%s: Error issuing join request\n", dev->name);
1232 orinoco_unlock(priv, &flags);
1238 /* Send new BSSID to userspace */
1239 static void orinoco_send_bssid_wevent(struct orinoco_private *priv)
1241 struct net_device *dev = priv->ndev;
1242 struct hermes *hw = &priv->hw;
1243 union iwreq_data wrqu;
1246 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID,
1247 ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
1251 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1253 /* Send event to user space */
1254 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1257 static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv)
1259 struct net_device *dev = priv->ndev;
1260 struct hermes *hw = &priv->hw;
1261 union iwreq_data wrqu;
1269 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO,
1270 sizeof(buf), NULL, &buf);
1274 ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1276 int rem = sizeof(buf) - (ie - &buf[0]);
1277 wrqu.data.length = ie[1] + 2;
1278 if (wrqu.data.length > rem)
1279 wrqu.data.length = rem;
1281 if (wrqu.data.length)
1282 /* Send event to user space */
1283 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie);
1287 static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv)
1289 struct net_device *dev = priv->ndev;
1290 struct hermes *hw = &priv->hw;
1291 union iwreq_data wrqu;
1293 u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */
1299 err = hw->ops->read_ltv(hw, USER_BAP,
1300 HERMES_RID_CURRENT_ASSOC_RESP_INFO,
1301 sizeof(buf), NULL, &buf);
1305 ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1307 int rem = sizeof(buf) - (ie - &buf[0]);
1308 wrqu.data.length = ie[1] + 2;
1309 if (wrqu.data.length > rem)
1310 wrqu.data.length = rem;
1312 if (wrqu.data.length)
1313 /* Send event to user space */
1314 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie);
1318 static void orinoco_send_wevents(struct work_struct *work)
1320 struct orinoco_private *priv =
1321 container_of(work, struct orinoco_private, wevent_work);
1322 unsigned long flags;
1324 if (orinoco_lock(priv, &flags) != 0)
1327 orinoco_send_assocreqie_wevent(priv);
1328 orinoco_send_assocrespie_wevent(priv);
1329 orinoco_send_bssid_wevent(priv);
1331 orinoco_unlock(priv, &flags);
1334 static void qbuf_scan(struct orinoco_private *priv, void *buf,
1337 struct orinoco_scan_data *sd;
1338 unsigned long flags;
1340 sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1345 spin_lock_irqsave(&priv->scan_lock, flags);
1346 list_add_tail(&sd->list, &priv->scan_list);
1347 spin_unlock_irqrestore(&priv->scan_lock, flags);
1349 schedule_work(&priv->process_scan);
1352 static void qabort_scan(struct orinoco_private *priv)
1354 struct orinoco_scan_data *sd;
1355 unsigned long flags;
1357 sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1358 sd->len = -1; /* Abort */
1360 spin_lock_irqsave(&priv->scan_lock, flags);
1361 list_add_tail(&sd->list, &priv->scan_list);
1362 spin_unlock_irqrestore(&priv->scan_lock, flags);
1364 schedule_work(&priv->process_scan);
1367 static void orinoco_process_scan_results(struct work_struct *work)
1369 struct orinoco_private *priv =
1370 container_of(work, struct orinoco_private, process_scan);
1371 struct orinoco_scan_data *sd, *temp;
1372 unsigned long flags;
1377 spin_lock_irqsave(&priv->scan_lock, flags);
1378 list_for_each_entry_safe(sd, temp, &priv->scan_list, list) {
1379 spin_unlock_irqrestore(&priv->scan_lock, flags);
1385 list_del(&sd->list);
1389 if (type == HERMES_INQ_CHANNELINFO)
1390 orinoco_add_extscan_result(priv, buf, len);
1392 orinoco_add_hostscan_results(priv, buf, len);
1395 } else if (priv->scan_request) {
1396 /* Either abort or complete the scan */
1397 cfg80211_scan_done(priv->scan_request, (len < 0));
1398 priv->scan_request = NULL;
1401 spin_lock_irqsave(&priv->scan_lock, flags);
1403 spin_unlock_irqrestore(&priv->scan_lock, flags);
1406 void __orinoco_ev_info(struct net_device *dev, hermes_t *hw)
1408 struct orinoco_private *priv = ndev_priv(dev);
1417 /* This is an answer to an INQUIRE command that we did earlier,
1418 * or an information "event" generated by the card
1419 * The controller return to us a pseudo frame containing
1420 * the information in question - Jean II */
1421 infofid = hermes_read_regn(hw, INFOFID);
1423 /* Read the info frame header - don't try too hard */
1424 err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info),
1427 printk(KERN_ERR "%s: error %d reading info frame. "
1428 "Frame dropped.\n", dev->name, err);
1432 len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
1433 type = le16_to_cpu(info.type);
1436 case HERMES_INQ_TALLIES: {
1437 struct hermes_tallies_frame tallies;
1438 struct iw_statistics *wstats = &priv->wstats;
1440 if (len > sizeof(tallies)) {
1441 printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
1443 len = sizeof(tallies);
1446 err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len,
1447 infofid, sizeof(info));
1451 /* Increment our various counters */
1452 /* wstats->discard.nwid - no wrong BSSID stuff */
1453 wstats->discard.code +=
1454 le16_to_cpu(tallies.RxWEPUndecryptable);
1455 if (len == sizeof(tallies))
1456 wstats->discard.code +=
1457 le16_to_cpu(tallies.RxDiscards_WEPICVError) +
1458 le16_to_cpu(tallies.RxDiscards_WEPExcluded);
1459 wstats->discard.misc +=
1460 le16_to_cpu(tallies.TxDiscardsWrongSA);
1461 wstats->discard.fragment +=
1462 le16_to_cpu(tallies.RxMsgInBadMsgFragments);
1463 wstats->discard.retries +=
1464 le16_to_cpu(tallies.TxRetryLimitExceeded);
1465 /* wstats->miss.beacon - no match */
1468 case HERMES_INQ_LINKSTATUS: {
1469 struct hermes_linkstatus linkstatus;
1473 if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
1476 if (len != sizeof(linkstatus)) {
1477 printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
1482 err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len,
1483 infofid, sizeof(info));
1486 newstatus = le16_to_cpu(linkstatus.linkstatus);
1488 /* Symbol firmware uses "out of range" to signal that
1489 * the hostscan frame can be requested. */
1490 if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
1491 priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
1492 priv->has_hostscan && priv->scan_request) {
1493 hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
1497 connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
1498 || (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
1499 || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);
1502 netif_carrier_on(dev);
1503 else if (!ignore_disconnect)
1504 netif_carrier_off(dev);
1506 if (newstatus != priv->last_linkstatus) {
1507 priv->last_linkstatus = newstatus;
1508 print_linkstatus(dev, newstatus);
1509 /* The info frame contains only one word which is the
1510 * status (see hermes.h). The status is pretty boring
1511 * in itself, that's why we export the new BSSID...
1513 schedule_work(&priv->wevent_work);
1517 case HERMES_INQ_SCAN:
1518 if (!priv->scan_request && priv->bssid_fixed &&
1519 priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
1520 schedule_work(&priv->join_work);
1524 case HERMES_INQ_HOSTSCAN:
1525 case HERMES_INQ_HOSTSCAN_SYMBOL: {
1526 /* Result of a scanning. Contains information about
1527 * cells in the vicinity - Jean II */
1532 printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
1538 /* Allocate buffer for results */
1539 buf = kmalloc(len, GFP_ATOMIC);
1541 /* No memory, so can't printk()... */
1546 /* Read scan data */
1547 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len,
1548 infofid, sizeof(info));
1555 #ifdef ORINOCO_DEBUG
1558 printk(KERN_DEBUG "Scan result [%02X", buf[0]);
1559 for (i = 1; i < (len * 2); i++)
1560 printk(":%02X", buf[i]);
1563 #endif /* ORINOCO_DEBUG */
1565 qbuf_scan(priv, buf, len, type);
1568 case HERMES_INQ_CHANNELINFO:
1570 struct agere_ext_scan_info *bss;
1572 if (!priv->scan_request) {
1573 printk(KERN_DEBUG "%s: Got chaninfo without scan, "
1574 "len=%d\n", dev->name, len);
1578 /* An empty result indicates that the scan is complete */
1580 qbuf_scan(priv, NULL, len, type);
1585 else if (len < (offsetof(struct agere_ext_scan_info,
1587 /* Drop this result now so we don't have to
1588 * keep checking later */
1590 "%s: Ext scan results too short (%d bytes)\n",
1595 bss = kmalloc(len, GFP_ATOMIC);
1599 /* Read scan data */
1600 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len,
1601 infofid, sizeof(info));
1605 qbuf_scan(priv, bss, len, type);
1609 case HERMES_INQ_SEC_STAT_AGERE:
1610 /* Security status (Agere specific) */
1611 /* Ignore this frame for now */
1612 if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
1616 printk(KERN_DEBUG "%s: Unknown information frame received: "
1617 "type 0x%04x, length %d\n", dev->name, type, len);
1618 /* We don't actually do anything about it */
1622 EXPORT_SYMBOL(__orinoco_ev_info);
1624 static void __orinoco_ev_infdrop(struct net_device *dev, hermes_t *hw)
1626 if (net_ratelimit())
1627 printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
1630 /********************************************************************/
1631 /* Internal hardware control routines */
1632 /********************************************************************/
1634 static int __orinoco_up(struct orinoco_private *priv)
1636 struct net_device *dev = priv->ndev;
1637 struct hermes *hw = &priv->hw;
1640 netif_carrier_off(dev); /* just to make sure */
1642 err = __orinoco_commit(priv);
1644 printk(KERN_ERR "%s: Error %d configuring card\n",
1649 /* Fire things up again */
1650 hermes_set_irqmask(hw, ORINOCO_INTEN);
1651 err = hermes_enable_port(hw, 0);
1653 printk(KERN_ERR "%s: Error %d enabling MAC port\n",
1658 netif_start_queue(dev);
1663 static int __orinoco_down(struct orinoco_private *priv)
1665 struct net_device *dev = priv->ndev;
1666 struct hermes *hw = &priv->hw;
1669 netif_stop_queue(dev);
1671 if (!priv->hw_unavailable) {
1672 if (!priv->broken_disableport) {
1673 err = hermes_disable_port(hw, 0);
1675 /* Some firmwares (e.g. Intersil 1.3.x) seem
1676 * to have problems disabling the port, oh
1678 printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
1680 priv->broken_disableport = 1;
1683 hermes_set_irqmask(hw, 0);
1684 hermes_write_regn(hw, EVACK, 0xffff);
1687 /* firmware will have to reassociate */
1688 netif_carrier_off(dev);
1689 priv->last_linkstatus = 0xffff;
1694 static int orinoco_reinit_firmware(struct orinoco_private *priv)
1696 struct hermes *hw = &priv->hw;
1699 err = hw->ops->init(hw);
1700 if (priv->do_fw_download && !err) {
1701 err = orinoco_download(priv);
1703 priv->do_fw_download = 0;
1706 err = orinoco_hw_allocate_fid(priv);
1712 __orinoco_set_multicast_list(struct net_device *dev)
1714 struct orinoco_private *priv = ndev_priv(dev);
1716 int promisc, mc_count;
1718 /* The Hermes doesn't seem to have an allmulti mode, so we go
1719 * into promiscuous mode and let the upper levels deal. */
1720 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
1721 (netdev_mc_count(dev) > MAX_MULTICAST(priv))) {
1726 mc_count = netdev_mc_count(dev);
1729 err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc);
1734 /* This must be called from user context, without locks held - use
1735 * schedule_work() */
1736 void orinoco_reset(struct work_struct *work)
1738 struct orinoco_private *priv =
1739 container_of(work, struct orinoco_private, reset_work);
1740 struct net_device *dev = priv->ndev;
1741 struct hermes *hw = &priv->hw;
1743 unsigned long flags;
1745 if (orinoco_lock(priv, &flags) != 0)
1746 /* When the hardware becomes available again, whatever
1747 * detects that is responsible for re-initializing
1748 * it. So no need for anything further */
1751 netif_stop_queue(dev);
1753 /* Shut off interrupts. Depending on what state the hardware
1754 * is in, this might not work, but we'll try anyway */
1755 hermes_set_irqmask(hw, 0);
1756 hermes_write_regn(hw, EVACK, 0xffff);
1758 priv->hw_unavailable++;
1759 priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
1760 netif_carrier_off(dev);
1762 orinoco_unlock(priv, &flags);
1764 /* Scanning support: Notify scan cancellation */
1765 if (priv->scan_request) {
1766 cfg80211_scan_done(priv->scan_request, 1);
1767 priv->scan_request = NULL;
1770 if (priv->hard_reset) {
1771 err = (*priv->hard_reset)(priv);
1773 printk(KERN_ERR "%s: orinoco_reset: Error %d "
1774 "performing hard reset\n", dev->name, err);
1779 err = orinoco_reinit_firmware(priv);
1781 printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
1786 /* This has to be called from user context */
1787 orinoco_lock_irq(priv);
1789 priv->hw_unavailable--;
1791 /* priv->open or priv->hw_unavailable might have changed while
1792 * we dropped the lock */
1793 if (priv->open && (!priv->hw_unavailable)) {
1794 err = __orinoco_up(priv);
1796 printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
1799 dev->trans_start = jiffies;
1802 orinoco_unlock_irq(priv);
1806 hermes_set_irqmask(hw, 0);
1807 netif_device_detach(dev);
1808 printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
1811 static int __orinoco_commit(struct orinoco_private *priv)
1813 struct net_device *dev = priv->ndev;
1816 err = orinoco_hw_program_rids(priv);
1818 /* FIXME: what about netif_tx_lock */
1819 (void) __orinoco_set_multicast_list(dev);
1824 /* Ensures configuration changes are applied. May result in a reset.
1825 * The caller should hold priv->lock
1827 int orinoco_commit(struct orinoco_private *priv)
1829 struct net_device *dev = priv->ndev;
1830 hermes_t *hw = &priv->hw;
1833 if (priv->broken_disableport) {
1834 schedule_work(&priv->reset_work);
1838 err = hermes_disable_port(hw, 0);
1840 printk(KERN_WARNING "%s: Unable to disable port "
1841 "while reconfiguring card\n", dev->name);
1842 priv->broken_disableport = 1;
1846 err = __orinoco_commit(priv);
1848 printk(KERN_WARNING "%s: Unable to reconfigure card\n",
1853 err = hermes_enable_port(hw, 0);
1855 printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n",
1862 printk(KERN_WARNING "%s: Resetting instead...\n", dev->name);
1863 schedule_work(&priv->reset_work);
1869 /********************************************************************/
1870 /* Interrupt handler */
1871 /********************************************************************/
1873 static void __orinoco_ev_tick(struct net_device *dev, hermes_t *hw)
1875 printk(KERN_DEBUG "%s: TICK\n", dev->name);
1878 static void __orinoco_ev_wterr(struct net_device *dev, hermes_t *hw)
1880 /* This seems to happen a fair bit under load, but ignoring it
1881 seems to work fine...*/
1882 printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
1886 irqreturn_t orinoco_interrupt(int irq, void *dev_id)
1888 struct orinoco_private *priv = dev_id;
1889 struct net_device *dev = priv->ndev;
1890 hermes_t *hw = &priv->hw;
1891 int count = MAX_IRQLOOPS_PER_IRQ;
1893 /* These are used to detect a runaway interrupt situation.
1895 * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
1896 * we panic and shut down the hardware
1898 /* jiffies value the last time we were called */
1899 static int last_irq_jiffy; /* = 0 */
1900 static int loops_this_jiffy; /* = 0 */
1901 unsigned long flags;
1903 if (orinoco_lock(priv, &flags) != 0) {
1904 /* If hw is unavailable - we don't know if the irq was
1909 evstat = hermes_read_regn(hw, EVSTAT);
1910 events = evstat & hw->inten;
1912 orinoco_unlock(priv, &flags);
1916 if (jiffies != last_irq_jiffy)
1917 loops_this_jiffy = 0;
1918 last_irq_jiffy = jiffies;
1920 while (events && count--) {
1921 if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
1922 printk(KERN_WARNING "%s: IRQ handler is looping too "
1923 "much! Resetting.\n", dev->name);
1924 /* Disable interrupts for now */
1925 hermes_set_irqmask(hw, 0);
1926 schedule_work(&priv->reset_work);
1930 /* Check the card hasn't been removed */
1931 if (!hermes_present(hw)) {
1932 DEBUG(0, "orinoco_interrupt(): card removed\n");
1936 if (events & HERMES_EV_TICK)
1937 __orinoco_ev_tick(dev, hw);
1938 if (events & HERMES_EV_WTERR)
1939 __orinoco_ev_wterr(dev, hw);
1940 if (events & HERMES_EV_INFDROP)
1941 __orinoco_ev_infdrop(dev, hw);
1942 if (events & HERMES_EV_INFO)
1943 __orinoco_ev_info(dev, hw);
1944 if (events & HERMES_EV_RX)
1945 __orinoco_ev_rx(dev, hw);
1946 if (events & HERMES_EV_TXEXC)
1947 __orinoco_ev_txexc(dev, hw);
1948 if (events & HERMES_EV_TX)
1949 __orinoco_ev_tx(dev, hw);
1950 if (events & HERMES_EV_ALLOC)
1951 __orinoco_ev_alloc(dev, hw);
1953 hermes_write_regn(hw, EVACK, evstat);
1955 evstat = hermes_read_regn(hw, EVSTAT);
1956 events = evstat & hw->inten;
1959 orinoco_unlock(priv, &flags);
1962 EXPORT_SYMBOL(orinoco_interrupt);
1964 /********************************************************************/
1965 /* Power management */
1966 /********************************************************************/
1967 #if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
1968 static int orinoco_pm_notifier(struct notifier_block *notifier,
1969 unsigned long pm_event,
1972 struct orinoco_private *priv = container_of(notifier,
1973 struct orinoco_private,
1976 /* All we need to do is cache the firmware before suspend, and
1977 * release it when we come out.
1979 * Only need to do this if we're downloading firmware. */
1980 if (!priv->do_fw_download)
1984 case PM_HIBERNATION_PREPARE:
1985 case PM_SUSPEND_PREPARE:
1986 orinoco_cache_fw(priv, 0);
1989 case PM_POST_RESTORE:
1990 /* Restore from hibernation failed. We need to clean
1991 * up in exactly the same way, so fall through. */
1992 case PM_POST_HIBERNATION:
1993 case PM_POST_SUSPEND:
1994 orinoco_uncache_fw(priv);
1997 case PM_RESTORE_PREPARE:
2005 static void orinoco_register_pm_notifier(struct orinoco_private *priv)
2007 priv->pm_notifier.notifier_call = orinoco_pm_notifier;
2008 register_pm_notifier(&priv->pm_notifier);
2011 static void orinoco_unregister_pm_notifier(struct orinoco_private *priv)
2013 unregister_pm_notifier(&priv->pm_notifier);
2015 #else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
2016 #define orinoco_register_pm_notifier(priv) do { } while(0)
2017 #define orinoco_unregister_pm_notifier(priv) do { } while(0)
2020 /********************************************************************/
2021 /* Initialization */
2022 /********************************************************************/
2024 int orinoco_init(struct orinoco_private *priv)
2026 struct device *dev = priv->dev;
2027 struct wiphy *wiphy = priv_to_wiphy(priv);
2028 hermes_t *hw = &priv->hw;
2031 /* No need to lock, the hw_unavailable flag is already set in
2032 * alloc_orinocodev() */
2033 priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN;
2035 /* Initialize the firmware */
2036 err = hw->ops->init(hw);
2038 dev_err(dev, "Failed to initialize firmware (err = %d)\n",
2043 err = determine_fw_capabilities(priv, wiphy->fw_version,
2044 sizeof(wiphy->fw_version),
2045 &wiphy->hw_version);
2047 dev_err(dev, "Incompatible firmware, aborting\n");
2051 if (priv->do_fw_download) {
2052 #ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
2053 orinoco_cache_fw(priv, 0);
2056 err = orinoco_download(priv);
2058 priv->do_fw_download = 0;
2060 /* Check firmware version again */
2061 err = determine_fw_capabilities(priv, wiphy->fw_version,
2062 sizeof(wiphy->fw_version),
2063 &wiphy->hw_version);
2065 dev_err(dev, "Incompatible firmware, aborting\n");
2070 if (priv->has_port3)
2071 dev_info(dev, "Ad-hoc demo mode supported\n");
2073 dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n");
2075 dev_info(dev, "WEP supported, %s-bit key\n",
2076 priv->has_big_wep ? "104" : "40");
2077 if (priv->has_wpa) {
2078 dev_info(dev, "WPA-PSK supported\n");
2079 if (orinoco_mic_init(priv)) {
2080 dev_err(dev, "Failed to setup MIC crypto algorithm. "
2081 "Disabling WPA support\n");
2086 err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr);
2090 err = orinoco_hw_allocate_fid(priv);
2092 dev_err(dev, "Failed to allocate NIC buffer!\n");
2096 /* Set up the default configuration */
2097 priv->iw_mode = NL80211_IFTYPE_STATION;
2098 /* By default use IEEE/IBSS ad-hoc mode if we have it */
2099 priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss);
2100 set_port_type(priv);
2101 priv->channel = 0; /* use firmware default */
2103 priv->promiscuous = 0;
2104 priv->encode_alg = ORINOCO_ALG_NONE;
2106 priv->wpa_enabled = 0;
2107 priv->tkip_cm_active = 0;
2109 priv->wpa_ie_len = 0;
2110 priv->wpa_ie = NULL;
2112 if (orinoco_wiphy_register(wiphy)) {
2117 /* Make the hardware available, as long as it hasn't been
2118 * removed elsewhere (e.g. by PCMCIA hot unplug) */
2119 orinoco_lock_irq(priv);
2120 priv->hw_unavailable--;
2121 orinoco_unlock_irq(priv);
2123 dev_dbg(dev, "Ready\n");
2128 EXPORT_SYMBOL(orinoco_init);
2130 static const struct net_device_ops orinoco_netdev_ops = {
2131 .ndo_open = orinoco_open,
2132 .ndo_stop = orinoco_stop,
2133 .ndo_start_xmit = orinoco_xmit,
2134 .ndo_set_multicast_list = orinoco_set_multicast_list,
2135 .ndo_change_mtu = orinoco_change_mtu,
2136 .ndo_set_mac_address = eth_mac_addr,
2137 .ndo_validate_addr = eth_validate_addr,
2138 .ndo_tx_timeout = orinoco_tx_timeout,
2139 .ndo_get_stats = orinoco_get_stats,
2142 /* Allocate private data.
2144 * This driver has a number of structures associated with it
2145 * netdev - Net device structure for each network interface
2146 * wiphy - structure associated with wireless phy
2147 * wireless_dev (wdev) - structure for each wireless interface
2148 * hw - structure for hermes chip info
2149 * card - card specific structure for use by the card driver
2150 * (airport, orinoco_cs)
2151 * priv - orinoco private data
2152 * device - generic linux device structure
2154 * +---------+ +---------+
2155 * | wiphy | | netdev |
2156 * | +-------+ | +-------+
2157 * | | priv | | | wdev |
2158 * | | +-----+ +-+-------+
2164 * priv has a link to netdev and device
2165 * wdev has a link to wiphy
2167 struct orinoco_private
2168 *alloc_orinocodev(int sizeof_card,
2169 struct device *device,
2170 int (*hard_reset)(struct orinoco_private *),
2171 int (*stop_fw)(struct orinoco_private *, int))
2173 struct orinoco_private *priv;
2174 struct wiphy *wiphy;
2177 * NOTE: We only support a single virtual interface
2178 * but this may change when monitor mode is added
2180 wiphy = wiphy_new(&orinoco_cfg_ops,
2181 sizeof(struct orinoco_private) + sizeof_card);
2185 priv = wiphy_priv(wiphy);
2189 priv->card = (void *)((unsigned long)priv
2190 + sizeof(struct orinoco_private));
2194 orinoco_wiphy_init(wiphy);
2197 priv->wireless_data.spy_data = &priv->spy_data;
2200 /* Set up default callbacks */
2201 priv->hard_reset = hard_reset;
2202 priv->stop_fw = stop_fw;
2204 spin_lock_init(&priv->lock);
2206 priv->hw_unavailable = 1; /* orinoco_init() must clear this
2207 * before anything else touches the
2209 INIT_WORK(&priv->reset_work, orinoco_reset);
2210 INIT_WORK(&priv->join_work, orinoco_join_ap);
2211 INIT_WORK(&priv->wevent_work, orinoco_send_wevents);
2213 INIT_LIST_HEAD(&priv->rx_list);
2214 tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet,
2215 (unsigned long) priv);
2217 spin_lock_init(&priv->scan_lock);
2218 INIT_LIST_HEAD(&priv->scan_list);
2219 INIT_WORK(&priv->process_scan, orinoco_process_scan_results);
2221 priv->last_linkstatus = 0xffff;
2223 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
2224 priv->cached_pri_fw = NULL;
2225 priv->cached_fw = NULL;
2228 /* Register PM notifiers */
2229 orinoco_register_pm_notifier(priv);
2233 EXPORT_SYMBOL(alloc_orinocodev);
2235 /* We can only support a single interface. We provide a separate
2236 * function to set it up to distinguish between hardware
2237 * initialisation and interface setup.
2239 * The base_addr and irq parameters are passed on to netdev for use
2242 int orinoco_if_add(struct orinoco_private *priv,
2243 unsigned long base_addr,
2245 const struct net_device_ops *ops)
2247 struct wiphy *wiphy = priv_to_wiphy(priv);
2248 struct wireless_dev *wdev;
2249 struct net_device *dev;
2252 dev = alloc_etherdev(sizeof(struct wireless_dev));
2257 /* Initialise wireless_dev */
2258 wdev = netdev_priv(dev);
2259 wdev->wiphy = wiphy;
2260 wdev->iftype = NL80211_IFTYPE_STATION;
2262 /* Setup / override net_device fields */
2263 dev->ieee80211_ptr = wdev;
2264 dev->watchdog_timeo = HZ; /* 1 second timeout */
2265 dev->wireless_handlers = &orinoco_handler_def;
2267 dev->wireless_data = &priv->wireless_data;
2269 /* Default to standard ops if not set */
2271 dev->netdev_ops = ops;
2273 dev->netdev_ops = &orinoco_netdev_ops;
2275 /* we use the default eth_mac_addr for setting the MAC addr */
2277 /* Reserve space in skb for the SNAP header */
2278 dev->needed_headroom = ENCAPS_OVERHEAD;
2280 netif_carrier_off(dev);
2282 memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
2283 memcpy(dev->perm_addr, wiphy->perm_addr, ETH_ALEN);
2285 dev->base_addr = base_addr;
2288 SET_NETDEV_DEV(dev, priv->dev);
2289 ret = register_netdev(dev);
2295 /* Report what we've done */
2296 dev_dbg(priv->dev, "Registerred interface %s.\n", dev->name);
2304 EXPORT_SYMBOL(orinoco_if_add);
2306 void orinoco_if_del(struct orinoco_private *priv)
2308 struct net_device *dev = priv->ndev;
2310 unregister_netdev(dev);
2313 EXPORT_SYMBOL(orinoco_if_del);
2315 void free_orinocodev(struct orinoco_private *priv)
2317 struct wiphy *wiphy = priv_to_wiphy(priv);
2318 struct orinoco_rx_data *rx_data, *temp;
2319 struct orinoco_scan_data *sd, *sdtemp;
2321 wiphy_unregister(wiphy);
2323 /* If the tasklet is scheduled when we call tasklet_kill it
2324 * will run one final time. However the tasklet will only
2325 * drain priv->rx_list if the hw is still available. */
2326 tasklet_kill(&priv->rx_tasklet);
2328 /* Explicitly drain priv->rx_list */
2329 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
2330 list_del(&rx_data->list);
2332 dev_kfree_skb(rx_data->skb);
2333 kfree(rx_data->desc);
2337 cancel_work_sync(&priv->process_scan);
2338 /* Explicitly drain priv->scan_list */
2339 list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) {
2340 list_del(&sd->list);
2342 if ((sd->len > 0) && sd->buf)
2347 orinoco_unregister_pm_notifier(priv);
2348 orinoco_uncache_fw(priv);
2350 priv->wpa_ie_len = 0;
2351 kfree(priv->wpa_ie);
2352 orinoco_mic_free(priv);
2355 EXPORT_SYMBOL(free_orinocodev);
2357 int orinoco_up(struct orinoco_private *priv)
2359 struct net_device *dev = priv->ndev;
2360 unsigned long flags;
2363 priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2365 err = orinoco_reinit_firmware(priv);
2367 printk(KERN_ERR "%s: Error %d re-initializing firmware\n",
2372 netif_device_attach(dev);
2373 priv->hw_unavailable--;
2375 if (priv->open && !priv->hw_unavailable) {
2376 err = __orinoco_up(priv);
2378 printk(KERN_ERR "%s: Error %d restarting card\n",
2383 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2387 EXPORT_SYMBOL(orinoco_up);
2389 void orinoco_down(struct orinoco_private *priv)
2391 struct net_device *dev = priv->ndev;
2392 unsigned long flags;
2395 priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2396 err = __orinoco_down(priv);
2398 printk(KERN_WARNING "%s: Error %d downing interface\n",
2401 netif_device_detach(dev);
2402 priv->hw_unavailable++;
2403 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2405 EXPORT_SYMBOL(orinoco_down);
2407 /********************************************************************/
2408 /* Module initialization */
2409 /********************************************************************/
2411 /* Can't be declared "const" or the whole __initdata section will
2413 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
2414 " (David Gibson <hermes@gibson.dropbear.id.au>, "
2415 "Pavel Roskin <proski@gnu.org>, et al)";
2417 static int __init init_orinoco(void)
2419 printk(KERN_DEBUG "%s\n", version);
2423 static void __exit exit_orinoco(void)
2427 module_init(init_orinoco);
2428 module_exit(exit_orinoco);