--- /dev/null
+/* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c)
+ *
+ * A driver for Hermes or Prism 2 chipset based PCMCIA wireless
+ * adaptors, with Lucent/Agere, Intersil or Symbol firmware.
+ *
+ * Current maintainers (as of 29 September 2003) are:
+ * Pavel Roskin <proski AT gnu.org>
+ * and David Gibson <hermes AT gibson.dropbear.id.au>
+ *
+ * (C) Copyright David Gibson, IBM Corporation 2001-2003.
+ * Copyright (C) 2000 David Gibson, Linuxcare Australia.
+ * With some help from :
+ * Copyright (C) 2001 Jean Tourrilhes, HP Labs
+ * Copyright (C) 2001 Benjamin Herrenschmidt
+ *
+ * Based on dummy_cs.c 1.27 2000/06/12 21:27:25
+ *
+ * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy
+ * AT fasta.fh-dortmund.de>
+ * http://www.stud.fh-dortmund.de/~andy/wvlan/
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License
+ * at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds AT users.sourceforge.net>. Portions created by David
+ * A. Hinds are Copyright (C) 1999 David A. Hinds. All Rights
+ * Reserved.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License version 2 (the "GPL"), in
+ * which case the provisions of the GPL are applicable instead of the
+ * above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the MPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice and
+ * other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file
+ * under either the MPL or the GPL. */
+
+/*
+ * TODO
+ * o Handle de-encapsulation within network layer, provide 802.11
+ * headers (patch from Thomas 'Dent' Mirlacher)
+ * o Fix possible races in SPY handling.
+ * o Disconnect wireless extensions from fundamental configuration.
+ * o (maybe) Software WEP support (patch from Stano Meduna).
+ * o (maybe) Use multiple Tx buffers - driver handling queue
+ * rather than firmware.
+ */
+
+/* Locking and synchronization:
+ *
+ * The basic principle is that everything is serialized through a
+ * single spinlock, priv->lock. The lock is used in user, bh and irq
+ * context, so when taken outside hardirq context it should always be
+ * taken with interrupts disabled. The lock protects both the
+ * hardware and the struct orinoco_private.
+ *
+ * Another flag, priv->hw_unavailable indicates that the hardware is
+ * unavailable for an extended period of time (e.g. suspended, or in
+ * the middle of a hard reset). This flag is protected by the
+ * spinlock. All code which touches the hardware should check the
+ * flag after taking the lock, and if it is set, give up on whatever
+ * they are doing and drop the lock again. The orinoco_lock()
+ * function handles this (it unlocks and returns -EBUSY if
+ * hw_unavailable is non-zero).
+ */
+
+#define DRIVER_NAME "orinoco"
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/suspend.h>
+#include <linux/if_arp.h>
+#include <linux/wireless.h>
+#include <linux/ieee80211.h>
+#include <net/iw_handler.h>
+#include <net/cfg80211.h>
+
+#include "hermes_rid.h"
+#include "hermes_dld.h"
+#include "hw.h"
+#include "scan.h"
+#include "mic.h"
+#include "fw.h"
+#include "wext.h"
+#include "cfg.h"
+#include "main.h"
+
+#include "orinoco.h"
+
+/********************************************************************/
+/* Module information */
+/********************************************************************/
+
+MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & "
+ "David Gibson <hermes@gibson.dropbear.id.au>");
+MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based "
+ "and similar wireless cards");
+MODULE_LICENSE("Dual MPL/GPL");
+
+/* Level of debugging. Used in the macros in orinoco.h */
+#ifdef ORINOCO_DEBUG
+int orinoco_debug = ORINOCO_DEBUG;
+EXPORT_SYMBOL(orinoco_debug);
+module_param(orinoco_debug, int, 0644);
+MODULE_PARM_DESC(orinoco_debug, "Debug level");
+#endif
+
+static bool suppress_linkstatus; /* = 0 */
+module_param(suppress_linkstatus, bool, 0644);
+MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
+
+static int ignore_disconnect; /* = 0 */
+module_param(ignore_disconnect, int, 0644);
+MODULE_PARM_DESC(ignore_disconnect,
+ "Don't report lost link to the network layer");
+
+int force_monitor; /* = 0 */
+module_param(force_monitor, int, 0644);
+MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");
+
+/********************************************************************/
+/* Internal constants */
+/********************************************************************/
+
+/* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
+static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
+#define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2)
+
+#define ORINOCO_MIN_MTU 256
+#define ORINOCO_MAX_MTU (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD)
+
+#define MAX_IRQLOOPS_PER_IRQ 10
+#define MAX_IRQLOOPS_PER_JIFFY (20000 / HZ) /* Based on a guestimate of
+ * how many events the
+ * device could
+ * legitimately generate */
+
+#define DUMMY_FID 0xFFFF
+
+/*#define MAX_MULTICAST(priv) (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \
+ HERMES_MAX_MULTICAST : 0)*/
+#define MAX_MULTICAST(priv) (HERMES_MAX_MULTICAST)
+
+#define ORINOCO_INTEN (HERMES_EV_RX | HERMES_EV_ALLOC \
+ | HERMES_EV_TX | HERMES_EV_TXEXC \
+ | HERMES_EV_WTERR | HERMES_EV_INFO \
+ | HERMES_EV_INFDROP)
+
+/********************************************************************/
+/* Data types */
+/********************************************************************/
+
+/* Beginning of the Tx descriptor, used in TxExc handling */
+struct hermes_txexc_data {
+ struct hermes_tx_descriptor desc;
+ __le16 frame_ctl;
+ __le16 duration_id;
+ u8 addr1[ETH_ALEN];
+} __packed;
+
+/* Rx frame header except compatibility 802.3 header */
+struct hermes_rx_descriptor {
+ /* Control */
+ __le16 status;
+ __le32 time;
+ u8 silence;
+ u8 signal;
+ u8 rate;
+ u8 rxflow;
+ __le32 reserved;
+
+ /* 802.11 header */
+ __le16 frame_ctl;
+ __le16 duration_id;
+ u8 addr1[ETH_ALEN];
+ u8 addr2[ETH_ALEN];
+ u8 addr3[ETH_ALEN];
+ __le16 seq_ctl;
+ u8 addr4[ETH_ALEN];
+
+ /* Data length */
+ __le16 data_len;
+} __packed;
+
+struct orinoco_rx_data {
+ struct hermes_rx_descriptor *desc;
+ struct sk_buff *skb;
+ struct list_head list;
+};
+
+struct orinoco_scan_data {
+ void *buf;
+ size_t len;
+ int type;
+ struct list_head list;
+};
+
+/********************************************************************/
+/* Function prototypes */
+/********************************************************************/
+
+static int __orinoco_set_multicast_list(struct net_device *dev);
+static int __orinoco_up(struct orinoco_private *priv);
+static int __orinoco_down(struct orinoco_private *priv);
+static int __orinoco_commit(struct orinoco_private *priv);
+
+/********************************************************************/
+/* Internal helper functions */
+/********************************************************************/
+
+void set_port_type(struct orinoco_private *priv)
+{
+ switch (priv->iw_mode) {
+ case NL80211_IFTYPE_STATION:
+ priv->port_type = 1;
+ priv->createibss = 0;
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ if (priv->prefer_port3) {
+ priv->port_type = 3;
+ priv->createibss = 0;
+ } else {
+ priv->port_type = priv->ibss_port;
+ priv->createibss = 1;
+ }
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ priv->port_type = 3;
+ priv->createibss = 0;
+ break;
+ default:
+ printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
+ priv->ndev->name);
+ }
+}
+
+/********************************************************************/
+/* Device methods */
+/********************************************************************/
+
+int orinoco_open(struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ unsigned long flags;
+ int err;
+
+ if (orinoco_lock(priv, &flags) != 0)
+ return -EBUSY;
+
+ err = __orinoco_up(priv);
+
+ if (!err)
+ priv->open = 1;
+
+ orinoco_unlock(priv, &flags);
+
+ return err;
+}
+EXPORT_SYMBOL(orinoco_open);
+
+int orinoco_stop(struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ int err = 0;
+
+ /* We mustn't use orinoco_lock() here, because we need to be
+ able to close the interface even if hw_unavailable is set
+ (e.g. as we're released after a PC Card removal) */
+ orinoco_lock_irq(priv);
+
+ priv->open = 0;
+
+ err = __orinoco_down(priv);
+
+ orinoco_unlock_irq(priv);
+
+ return err;
+}
+EXPORT_SYMBOL(orinoco_stop);
+
+struct net_device_stats *orinoco_get_stats(struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+
+ return &priv->stats;
+}
+EXPORT_SYMBOL(orinoco_get_stats);
+
+void orinoco_set_multicast_list(struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ unsigned long flags;
+
+ if (orinoco_lock(priv, &flags) != 0) {
+ printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
+ "called when hw_unavailable\n", dev->name);
+ return;
+ }
+
+ __orinoco_set_multicast_list(dev);
+ orinoco_unlock(priv, &flags);
+}
+EXPORT_SYMBOL(orinoco_set_multicast_list);
+
+int orinoco_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+
+ if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU))
+ return -EINVAL;
+
+ /* MTU + encapsulation + header length */
+ if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) >
+ (priv->nicbuf_size - ETH_HLEN))
+ return -EINVAL;
+
+ dev->mtu = new_mtu;
+
+ return 0;
+}
+EXPORT_SYMBOL(orinoco_change_mtu);
+
+/********************************************************************/
+/* Tx path */
+/********************************************************************/
+
+/* Add encapsulation and MIC to the existing SKB.
+ * The main xmit routine will then send the whole lot to the card.
+ * Need 8 bytes headroom
+ * Need 8 bytes tailroom
+ *
+ * With encapsulated ethernet II frame
+ * --------
+ * 803.3 header (14 bytes)
+ * dst[6]
+ * -------- src[6]
+ * 803.3 header (14 bytes) len[2]
+ * dst[6] 803.2 header (8 bytes)
+ * src[6] encaps[6]
+ * len[2] <- leave alone -> len[2]
+ * -------- -------- <-- 0
+ * Payload Payload
+ * ... ...
+ *
+ * -------- --------
+ * MIC (8 bytes)
+ * --------
+ *
+ * returns 0 on success, -ENOMEM on error.
+ */
+int orinoco_process_xmit_skb(struct sk_buff *skb,
+ struct net_device *dev,
+ struct orinoco_private *priv,
+ int *tx_control,
+ u8 *mic_buf)
+{
+ struct orinoco_tkip_key *key;
+ struct ethhdr *eh;
+ int do_mic;
+
+ key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key;
+
+ do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) &&
+ (key != NULL));
+
+ if (do_mic)
+ *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
+ HERMES_TXCTRL_MIC;
+
+ eh = (struct ethhdr *)skb->data;
+
+ /* Encapsulate Ethernet-II frames */
+ if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
+ struct header_struct {
+ struct ethhdr eth; /* 802.3 header */
+ u8 encap[6]; /* 802.2 header */
+ } __packed hdr;
+ int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN);
+
+ if (skb_headroom(skb) < ENCAPS_OVERHEAD) {
+ if (net_ratelimit())
+ printk(KERN_ERR
+ "%s: Not enough headroom for 802.2 headers %d\n",
+ dev->name, skb_headroom(skb));
+ return -ENOMEM;
+ }
+
+ /* Fill in new header */
+ memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
+ hdr.eth.h_proto = htons(len);
+ memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));
+
+ /* Make room for the new header, and copy it in */
+ eh = (struct ethhdr *) skb_push(skb, ENCAPS_OVERHEAD);
+ memcpy(eh, &hdr, sizeof(hdr));
+ }
+
+ /* Calculate Michael MIC */
+ if (do_mic) {
+ size_t len = skb->len - ETH_HLEN;
+ u8 *mic = &mic_buf[0];
+
+ /* Have to write to an even address, so copy the spare
+ * byte across */
+ if (skb->len % 2) {
+ *mic = skb->data[skb->len - 1];
+ mic++;
+ }
+
+ orinoco_mic(priv->tx_tfm_mic, key->tx_mic,
+ eh->h_dest, eh->h_source, 0 /* priority */,
+ skb->data + ETH_HLEN,
+ len, mic);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(orinoco_process_xmit_skb);
+
+static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+ struct hermes *hw = &priv->hw;
+ int err = 0;
+ u16 txfid = priv->txfid;
+ int tx_control;
+ unsigned long flags;
+ u8 mic_buf[MICHAEL_MIC_LEN + 1];
+
+ if (!netif_running(dev)) {
+ printk(KERN_ERR "%s: Tx on stopped device!\n",
+ dev->name);
+ return NETDEV_TX_BUSY;
+ }
+
+ if (netif_queue_stopped(dev)) {
+ printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
+ dev->name);
+ return NETDEV_TX_BUSY;
+ }
+
+ if (orinoco_lock(priv, &flags) != 0) {
+ printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n",
+ dev->name);
+ return NETDEV_TX_BUSY;
+ }
+
+ if (!netif_carrier_ok(dev) ||
+ (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
+ /* Oops, the firmware hasn't established a connection,
+ silently drop the packet (this seems to be the
+ safest approach). */
+ goto drop;
+ }
+
+ /* Check packet length */
+ if (skb->len < ETH_HLEN)
+ goto drop;
+
+ tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX;
+
+ err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
+ &mic_buf[0]);
+ if (err)
+ goto drop;
+
+ if (priv->has_alt_txcntl) {
+ /* WPA enabled firmwares have tx_cntl at the end of
+ * the 802.11 header. So write zeroed descriptor and
+ * 802.11 header at the same time
+ */
+ char desc[HERMES_802_3_OFFSET];
+ __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET];
+
+ memset(&desc, 0, sizeof(desc));
+
+ *txcntl = cpu_to_le16(tx_control);
+ err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
+ txfid, 0);
+ if (err) {
+ if (net_ratelimit())
+ printk(KERN_ERR "%s: Error %d writing Tx "
+ "descriptor to BAP\n", dev->name, err);
+ goto busy;
+ }
+ } else {
+ struct hermes_tx_descriptor desc;
+
+ memset(&desc, 0, sizeof(desc));
+
+ desc.tx_control = cpu_to_le16(tx_control);
+ err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
+ txfid, 0);
+ if (err) {
+ if (net_ratelimit())
+ printk(KERN_ERR "%s: Error %d writing Tx "
+ "descriptor to BAP\n", dev->name, err);
+ goto busy;
+ }
+
+ /* Clear the 802.11 header and data length fields - some
+ * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
+ * if this isn't done. */
+ hermes_clear_words(hw, HERMES_DATA0,
+ HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);
+ }
+
+ err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len,
+ txfid, HERMES_802_3_OFFSET);
+ if (err) {
+ printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
+ dev->name, err);
+ goto busy;
+ }
+
+ if (tx_control & HERMES_TXCTRL_MIC) {
+ size_t offset = HERMES_802_3_OFFSET + skb->len;
+ size_t len = MICHAEL_MIC_LEN;
+
+ if (offset % 2) {
+ offset--;
+ len++;
+ }
+ err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
+ txfid, offset);
+ if (err) {
+ printk(KERN_ERR "%s: Error %d writing MIC to BAP\n",
+ dev->name, err);
+ goto busy;
+ }
+ }
+
+ /* Finally, we actually initiate the send */
+ netif_stop_queue(dev);
+
+ err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
+ txfid, NULL);
+ if (err) {
+ netif_start_queue(dev);
+ if (net_ratelimit())
+ printk(KERN_ERR "%s: Error %d transmitting packet\n",
+ dev->name, err);
+ goto busy;
+ }
+
+ stats->tx_bytes += HERMES_802_3_OFFSET + skb->len;
+ goto ok;
+
+ drop:
+ stats->tx_errors++;
+ stats->tx_dropped++;
+
+ ok:
+ orinoco_unlock(priv, &flags);
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+
+ busy:
+ if (err == -EIO)
+ schedule_work(&priv->reset_work);
+ orinoco_unlock(priv, &flags);
+ return NETDEV_TX_BUSY;
+}
+
+static void __orinoco_ev_alloc(struct net_device *dev, struct hermes *hw)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ u16 fid = hermes_read_regn(hw, ALLOCFID);
+
+ if (fid != priv->txfid) {
+ if (fid != DUMMY_FID)
+ printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
+ dev->name, fid);
+ return;
+ }
+
+ hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
+}
+
+static void __orinoco_ev_tx(struct net_device *dev, struct hermes *hw)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+
+ stats->tx_packets++;
+
+ netif_wake_queue(dev);
+
+ hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
+}
+
+static void __orinoco_ev_txexc(struct net_device *dev, struct hermes *hw)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+ u16 fid = hermes_read_regn(hw, TXCOMPLFID);
+ u16 status;
+ struct hermes_txexc_data hdr;
+ int err = 0;
+
+ if (fid == DUMMY_FID)
+ return; /* Nothing's really happened */
+
+ /* Read part of the frame header - we need status and addr1 */
+ err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr,
+ sizeof(struct hermes_txexc_data),
+ fid, 0);
+
+ hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
+ stats->tx_errors++;
+
+ if (err) {
+ printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
+ "(FID=%04X error %d)\n",
+ dev->name, fid, err);
+ return;
+ }
+
+ DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
+ err, fid);
+
+ /* We produce a TXDROP event only for retry or lifetime
+ * exceeded, because that's the only status that really mean
+ * that this particular node went away.
+ * Other errors means that *we* screwed up. - Jean II */
+ status = le16_to_cpu(hdr.desc.status);
+ if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
+ union iwreq_data wrqu;
+
+ /* Copy 802.11 dest address.
+ * We use the 802.11 header because the frame may
+ * not be 802.3 or may be mangled...
+ * In Ad-Hoc mode, it will be the node address.
+ * In managed mode, it will be most likely the AP addr
+ * User space will figure out how to convert it to
+ * whatever it needs (IP address or else).
+ * - Jean II */
+ memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
+ wrqu.addr.sa_family = ARPHRD_ETHER;
+
+ /* Send event to user space */
+ wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
+ }
+
+ netif_wake_queue(dev);
+}
+
+void orinoco_tx_timeout(struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+ struct hermes *hw = &priv->hw;
+
+ printk(KERN_WARNING "%s: Tx timeout! "
+ "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
+ dev->name, hermes_read_regn(hw, ALLOCFID),
+ hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));
+
+ stats->tx_errors++;
+
+ schedule_work(&priv->reset_work);
+}
+EXPORT_SYMBOL(orinoco_tx_timeout);
+
+/********************************************************************/
+/* Rx path (data frames) */
+/********************************************************************/
+
+/* Does the frame have a SNAP header indicating it should be
+ * de-encapsulated to Ethernet-II? */
+static inline int is_ethersnap(void *_hdr)
+{
+ u8 *hdr = _hdr;
+
+ /* We de-encapsulate all packets which, a) have SNAP headers
+ * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
+ * and where b) the OUI of the SNAP header is 00:00:00 or
+ * 00:00:f8 - we need both because different APs appear to use
+ * different OUIs for some reason */
+ return (memcmp(hdr, &encaps_hdr, 5) == 0)
+ && ((hdr[5] == 0x00) || (hdr[5] == 0xf8));
+}
+
+static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
+ int level, int noise)
+{
+ struct iw_quality wstats;
+ wstats.level = level - 0x95;
+ wstats.noise = noise - 0x95;
+ wstats.qual = (level > noise) ? (level - noise) : 0;
+ wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
+ /* Update spy records */
+ wireless_spy_update(dev, mac, &wstats);
+}
+
+static void orinoco_stat_gather(struct net_device *dev,
+ struct sk_buff *skb,
+ struct hermes_rx_descriptor *desc)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+
+ /* Using spy support with lots of Rx packets, like in an
+ * infrastructure (AP), will really slow down everything, because
+ * the MAC address must be compared to each entry of the spy list.
+ * If the user really asks for it (set some address in the
+ * spy list), we do it, but he will pay the price.
+ * Note that to get here, you need both WIRELESS_SPY
+ * compiled in AND some addresses in the list !!!
+ */
+ /* Note : gcc will optimise the whole section away if
+ * WIRELESS_SPY is not defined... - Jean II */
+ if (SPY_NUMBER(priv)) {
+ orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN,
+ desc->signal, desc->silence);
+ }
+}
+
+/*
+ * orinoco_rx_monitor - handle received monitor frames.
+ *
+ * Arguments:
+ * dev network device
+ * rxfid received FID
+ * desc rx descriptor of the frame
+ *
+ * Call context: interrupt
+ */
+static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
+ struct hermes_rx_descriptor *desc)
+{
+ u32 hdrlen = 30; /* return full header by default */
+ u32 datalen = 0;
+ u16 fc;
+ int err;
+ int len;
+ struct sk_buff *skb;
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+ struct hermes *hw = &priv->hw;
+
+ len = le16_to_cpu(desc->data_len);
+
+ /* Determine the size of the header and the data */
+ fc = le16_to_cpu(desc->frame_ctl);
+ switch (fc & IEEE80211_FCTL_FTYPE) {
+ case IEEE80211_FTYPE_DATA:
+ if ((fc & IEEE80211_FCTL_TODS)
+ && (fc & IEEE80211_FCTL_FROMDS))
+ hdrlen = 30;
+ else
+ hdrlen = 24;
+ datalen = len;
+ break;
+ case IEEE80211_FTYPE_MGMT:
+ hdrlen = 24;
+ datalen = len;
+ break;
+ case IEEE80211_FTYPE_CTL:
+ switch (fc & IEEE80211_FCTL_STYPE) {
+ case IEEE80211_STYPE_PSPOLL:
+ case IEEE80211_STYPE_RTS:
+ case IEEE80211_STYPE_CFEND:
+ case IEEE80211_STYPE_CFENDACK:
+ hdrlen = 16;
+ break;
+ case IEEE80211_STYPE_CTS:
+ case IEEE80211_STYPE_ACK:
+ hdrlen = 10;
+ break;
+ }
+ break;
+ default:
+ /* Unknown frame type */
+ break;
+ }
+
+ /* sanity check the length */
+ if (datalen > IEEE80211_MAX_DATA_LEN + 12) {
+ printk(KERN_DEBUG "%s: oversized monitor frame, "
+ "data length = %d\n", dev->name, datalen);
+ stats->rx_length_errors++;
+ goto update_stats;
+ }
+
+ skb = dev_alloc_skb(hdrlen + datalen);
+ if (!skb) {
+ printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
+ dev->name);
+ goto update_stats;
+ }
+
+ /* Copy the 802.11 header to the skb */
+ memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
+ skb_reset_mac_header(skb);
+
+ /* If any, copy the data from the card to the skb */
+ if (datalen > 0) {
+ err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
+ ALIGN(datalen, 2), rxfid,
+ HERMES_802_2_OFFSET);
+ if (err) {
+ printk(KERN_ERR "%s: error %d reading monitor frame\n",
+ dev->name, err);
+ goto drop;
+ }
+ }
+
+ skb->dev = dev;
+ skb->ip_summed = CHECKSUM_NONE;
+ skb->pkt_type = PACKET_OTHERHOST;
+ skb->protocol = cpu_to_be16(ETH_P_802_2);
+
+ stats->rx_packets++;
+ stats->rx_bytes += skb->len;
+
+ netif_rx(skb);
+ return;
+
+ drop:
+ dev_kfree_skb_irq(skb);
+ update_stats:
+ stats->rx_errors++;
+ stats->rx_dropped++;
+}
+
+void __orinoco_ev_rx(struct net_device *dev, struct hermes *hw)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+ struct iw_statistics *wstats = &priv->wstats;
+ struct sk_buff *skb = NULL;
+ u16 rxfid, status;
+ int length;
+ struct hermes_rx_descriptor *desc;
+ struct orinoco_rx_data *rx_data;
+ int err;
+
+ desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
+ if (!desc)
+ goto update_stats;
+
+ rxfid = hermes_read_regn(hw, RXFID);
+
+ err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc),
+ rxfid, 0);
+ if (err) {
+ printk(KERN_ERR "%s: error %d reading Rx descriptor. "
+ "Frame dropped.\n", dev->name, err);
+ goto update_stats;
+ }
+
+ status = le16_to_cpu(desc->status);
+
+ if (status & HERMES_RXSTAT_BADCRC) {
+ DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
+ dev->name);
+ stats->rx_crc_errors++;
+ goto update_stats;
+ }
+
+ /* Handle frames in monitor mode */
+ if (priv->iw_mode == NL80211_IFTYPE_MONITOR) {
+ orinoco_rx_monitor(dev, rxfid, desc);
+ goto out;
+ }
+
+ if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
+ DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
+ dev->name);
+ wstats->discard.code++;
+ goto update_stats;
+ }
+
+ length = le16_to_cpu(desc->data_len);
+
+ /* Sanity checks */
+ if (length < 3) { /* No for even an 802.2 LLC header */
+ /* At least on Symbol firmware with PCF we get quite a
+ lot of these legitimately - Poll frames with no
+ data. */
+ goto out;
+ }
+ if (length > IEEE80211_MAX_DATA_LEN) {
+ printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
+ dev->name, length);
+ stats->rx_length_errors++;
+ goto update_stats;
+ }
+
+ /* Payload size does not include Michael MIC. Increase payload
+ * size to read it together with the data. */
+ if (status & HERMES_RXSTAT_MIC)
+ length += MICHAEL_MIC_LEN;
+
+ /* We need space for the packet data itself, plus an ethernet
+ header, plus 2 bytes so we can align the IP header on a
+ 32bit boundary, plus 1 byte so we can read in odd length
+ packets from the card, which has an IO granularity of 16
+ bits */
+ skb = dev_alloc_skb(length + ETH_HLEN + 2 + 1);
+ if (!skb) {
+ printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
+ dev->name);
+ goto update_stats;
+ }
+
+ /* We'll prepend the header, so reserve space for it. The worst
+ case is no decapsulation, when 802.3 header is prepended and
+ nothing is removed. 2 is for aligning the IP header. */
+ skb_reserve(skb, ETH_HLEN + 2);
+
+ err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length),
+ ALIGN(length, 2), rxfid,
+ HERMES_802_2_OFFSET);
+ if (err) {
+ printk(KERN_ERR "%s: error %d reading frame. "
+ "Frame dropped.\n", dev->name, err);
+ goto drop;
+ }
+
+ /* Add desc and skb to rx queue */
+ rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC);
+ if (!rx_data)
+ goto drop;
+
+ rx_data->desc = desc;
+ rx_data->skb = skb;
+ list_add_tail(&rx_data->list, &priv->rx_list);
+ tasklet_schedule(&priv->rx_tasklet);
+
+ return;
+
+drop:
+ dev_kfree_skb_irq(skb);
+update_stats:
+ stats->rx_errors++;
+ stats->rx_dropped++;
+out:
+ kfree(desc);
+}
+EXPORT_SYMBOL(__orinoco_ev_rx);
+
+static void orinoco_rx(struct net_device *dev,
+ struct hermes_rx_descriptor *desc,
+ struct sk_buff *skb)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ struct net_device_stats *stats = &priv->stats;
+ u16 status, fc;
+ int length;
+ struct ethhdr *hdr;
+
+ status = le16_to_cpu(desc->status);
+ length = le16_to_cpu(desc->data_len);
+ fc = le16_to_cpu(desc->frame_ctl);
+
+ /* Calculate and check MIC */
+ if (status & HERMES_RXSTAT_MIC) {
+ struct orinoco_tkip_key *key;
+ int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >>
+ HERMES_MIC_KEY_ID_SHIFT);
+ u8 mic[MICHAEL_MIC_LEN];
+ u8 *rxmic;
+ u8 *src = (fc & IEEE80211_FCTL_FROMDS) ?
+ desc->addr3 : desc->addr2;
+
+ /* Extract Michael MIC from payload */
+ rxmic = skb->data + skb->len - MICHAEL_MIC_LEN;
+
+ skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
+ length -= MICHAEL_MIC_LEN;
+
+ key = (struct orinoco_tkip_key *) priv->keys[key_id].key;
+
+ if (!key) {
+ printk(KERN_WARNING "%s: Received encrypted frame from "
+ "%pM using key %i, but key is not installed\n",
+ dev->name, src, key_id);
+ goto drop;
+ }
+
+ orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src,
+ 0, /* priority or QoS? */
+ skb->data, skb->len, &mic[0]);
+
+ if (memcmp(mic, rxmic,
+ MICHAEL_MIC_LEN)) {
+ union iwreq_data wrqu;
+ struct iw_michaelmicfailure wxmic;
+
+ printk(KERN_WARNING "%s: "
+ "Invalid Michael MIC in data frame from %pM, "
+ "using key %i\n",
+ dev->name, src, key_id);
+
+ /* TODO: update stats */
+
+ /* Notify userspace */
+ memset(&wxmic, 0, sizeof(wxmic));
+ wxmic.flags = key_id & IW_MICFAILURE_KEY_ID;
+ wxmic.flags |= (desc->addr1[0] & 1) ?
+ IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE;
+ wxmic.src_addr.sa_family = ARPHRD_ETHER;
+ memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN);
+
+ (void) orinoco_hw_get_tkip_iv(priv, key_id,
+ &wxmic.tsc[0]);
+
+ memset(&wrqu, 0, sizeof(wrqu));
+ wrqu.data.length = sizeof(wxmic);
+ wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu,
+ (char *) &wxmic);
+
+ goto drop;
+ }
+ }
+
+ /* Handle decapsulation
+ * In most cases, the firmware tell us about SNAP frames.
+ * For some reason, the SNAP frames sent by LinkSys APs
+ * are not properly recognised by most firmwares.
+ * So, check ourselves */
+ if (length >= ENCAPS_OVERHEAD &&
+ (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
+ ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
+ is_ethersnap(skb->data))) {
+ /* These indicate a SNAP within 802.2 LLC within
+ 802.11 frame which we'll need to de-encapsulate to
+ the original EthernetII frame. */
+ hdr = (struct ethhdr *)skb_push(skb,
+ ETH_HLEN - ENCAPS_OVERHEAD);
+ } else {
+ /* 802.3 frame - prepend 802.3 header as is */
+ hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN);
+ hdr->h_proto = htons(length);
+ }
+ memcpy(hdr->h_dest, desc->addr1, ETH_ALEN);
+ if (fc & IEEE80211_FCTL_FROMDS)
+ memcpy(hdr->h_source, desc->addr3, ETH_ALEN);
+ else
+ memcpy(hdr->h_source, desc->addr2, ETH_ALEN);
+
+ skb->protocol = eth_type_trans(skb, dev);
+ skb->ip_summed = CHECKSUM_NONE;
+ if (fc & IEEE80211_FCTL_TODS)
+ skb->pkt_type = PACKET_OTHERHOST;
+
+ /* Process the wireless stats if needed */
+ orinoco_stat_gather(dev, skb, desc);
+
+ /* Pass the packet to the networking stack */
+ netif_rx(skb);
+ stats->rx_packets++;
+ stats->rx_bytes += length;
+
+ return;
+
+ drop:
+ dev_kfree_skb(skb);
+ stats->rx_errors++;
+ stats->rx_dropped++;
+}
+
+static void orinoco_rx_isr_tasklet(unsigned long data)
+{
+ struct orinoco_private *priv = (struct orinoco_private *) data;
+ struct net_device *dev = priv->ndev;
+ struct orinoco_rx_data *rx_data, *temp;
+ struct hermes_rx_descriptor *desc;
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ /* orinoco_rx requires the driver lock, and we also need to
+ * protect priv->rx_list, so just hold the lock over the
+ * lot.
+ *
+ * If orinoco_lock fails, we've unplugged the card. In this
+ * case just abort. */
+ if (orinoco_lock(priv, &flags) != 0)
+ return;
+
+ /* extract desc and skb from queue */
+ list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
+ desc = rx_data->desc;
+ skb = rx_data->skb;
+ list_del(&rx_data->list);
+ kfree(rx_data);
+
+ orinoco_rx(dev, desc, skb);
+
+ kfree(desc);
+ }
+
+ orinoco_unlock(priv, &flags);
+}
+
+/********************************************************************/
+/* Rx path (info frames) */
+/********************************************************************/
+
+static void print_linkstatus(struct net_device *dev, u16 status)
+{
+ char *s;
+
+ if (suppress_linkstatus)
+ return;
+
+ switch (status) {
+ case HERMES_LINKSTATUS_NOT_CONNECTED:
+ s = "Not Connected";
+ break;
+ case HERMES_LINKSTATUS_CONNECTED:
+ s = "Connected";
+ break;
+ case HERMES_LINKSTATUS_DISCONNECTED:
+ s = "Disconnected";
+ break;
+ case HERMES_LINKSTATUS_AP_CHANGE:
+ s = "AP Changed";
+ break;
+ case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
+ s = "AP Out of Range";
+ break;
+ case HERMES_LINKSTATUS_AP_IN_RANGE:
+ s = "AP In Range";
+ break;
+ case HERMES_LINKSTATUS_ASSOC_FAILED:
+ s = "Association Failed";
+ break;
+ default:
+ s = "UNKNOWN";
+ }
+
+ printk(KERN_DEBUG "%s: New link status: %s (%04x)\n",
+ dev->name, s, status);
+}
+
+/* Search scan results for requested BSSID, join it if found */
+static void orinoco_join_ap(struct work_struct *work)
+{
+ struct orinoco_private *priv =
+ container_of(work, struct orinoco_private, join_work);
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ int err;
+ unsigned long flags;
+ struct join_req {
+ u8 bssid[ETH_ALEN];
+ __le16 channel;
+ } __packed req;
+ const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
+ struct prism2_scan_apinfo *atom = NULL;
+ int offset = 4;
+ int found = 0;
+ u8 *buf;
+ u16 len;
+
+ /* Allocate buffer for scan results */
+ buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ if (orinoco_lock(priv, &flags) != 0)
+ goto fail_lock;
+
+ /* Sanity checks in case user changed something in the meantime */
+ if (!priv->bssid_fixed)
+ goto out;
+
+ if (strlen(priv->desired_essid) == 0)
+ goto out;
+
+ /* Read scan results from the firmware */
+ err = hw->ops->read_ltv(hw, USER_BAP,
+ HERMES_RID_SCANRESULTSTABLE,
+ MAX_SCAN_LEN, &len, buf);
+ if (err) {
+ printk(KERN_ERR "%s: Cannot read scan results\n",
+ dev->name);
+ goto out;
+ }
+
+ len = HERMES_RECLEN_TO_BYTES(len);
+
+ /* Go through the scan results looking for the channel of the AP
+ * we were requested to join */
+ for (; offset + atom_len <= len; offset += atom_len) {
+ atom = (struct prism2_scan_apinfo *) (buf + offset);
+ if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ DEBUG(1, "%s: Requested AP not found in scan results\n",
+ dev->name);
+ goto out;
+ }
+
+ memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
+ req.channel = atom->channel; /* both are little-endian */
+ err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
+ &req);
+ if (err)
+ printk(KERN_ERR "%s: Error issuing join request\n", dev->name);
+
+ out:
+ orinoco_unlock(priv, &flags);
+
+ fail_lock:
+ kfree(buf);
+}
+
+/* Send new BSSID to userspace */
+static void orinoco_send_bssid_wevent(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ union iwreq_data wrqu;
+ int err;
+
+ err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID,
+ ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
+ if (err != 0)
+ return;
+
+ wrqu.ap_addr.sa_family = ARPHRD_ETHER;
+
+ /* Send event to user space */
+ wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
+}
+
+static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ union iwreq_data wrqu;
+ int err;
+ u8 buf[88];
+ u8 *ie;
+
+ if (!priv->has_wpa)
+ return;
+
+ err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO,
+ sizeof(buf), NULL, &buf);
+ if (err != 0)
+ return;
+
+ ie = orinoco_get_wpa_ie(buf, sizeof(buf));
+ if (ie) {
+ int rem = sizeof(buf) - (ie - &buf[0]);
+ wrqu.data.length = ie[1] + 2;
+ if (wrqu.data.length > rem)
+ wrqu.data.length = rem;
+
+ if (wrqu.data.length)
+ /* Send event to user space */
+ wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie);
+ }
+}
+
+static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ union iwreq_data wrqu;
+ int err;
+ u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */
+ u8 *ie;
+
+ if (!priv->has_wpa)
+ return;
+
+ err = hw->ops->read_ltv(hw, USER_BAP,
+ HERMES_RID_CURRENT_ASSOC_RESP_INFO,
+ sizeof(buf), NULL, &buf);
+ if (err != 0)
+ return;
+
+ ie = orinoco_get_wpa_ie(buf, sizeof(buf));
+ if (ie) {
+ int rem = sizeof(buf) - (ie - &buf[0]);
+ wrqu.data.length = ie[1] + 2;
+ if (wrqu.data.length > rem)
+ wrqu.data.length = rem;
+
+ if (wrqu.data.length)
+ /* Send event to user space */
+ wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie);
+ }
+}
+
+static void orinoco_send_wevents(struct work_struct *work)
+{
+ struct orinoco_private *priv =
+ container_of(work, struct orinoco_private, wevent_work);
+ unsigned long flags;
+
+ if (orinoco_lock(priv, &flags) != 0)
+ return;
+
+ orinoco_send_assocreqie_wevent(priv);
+ orinoco_send_assocrespie_wevent(priv);
+ orinoco_send_bssid_wevent(priv);
+
+ orinoco_unlock(priv, &flags);
+}
+
+static void qbuf_scan(struct orinoco_private *priv, void *buf,
+ int len, int type)
+{
+ struct orinoco_scan_data *sd;
+ unsigned long flags;
+
+ sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
+ if (!sd)
+ return;
+
+ sd->buf = buf;
+ sd->len = len;
+ sd->type = type;
+
+ spin_lock_irqsave(&priv->scan_lock, flags);
+ list_add_tail(&sd->list, &priv->scan_list);
+ spin_unlock_irqrestore(&priv->scan_lock, flags);
+
+ schedule_work(&priv->process_scan);
+}
+
+static void qabort_scan(struct orinoco_private *priv)
+{
+ struct orinoco_scan_data *sd;
+ unsigned long flags;
+
+ sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
+ if (!sd)
+ return;
+
+ sd->len = -1; /* Abort */
+
+ spin_lock_irqsave(&priv->scan_lock, flags);
+ list_add_tail(&sd->list, &priv->scan_list);
+ spin_unlock_irqrestore(&priv->scan_lock, flags);
+
+ schedule_work(&priv->process_scan);
+}
+
+static void orinoco_process_scan_results(struct work_struct *work)
+{
+ struct orinoco_private *priv =
+ container_of(work, struct orinoco_private, process_scan);
+ struct orinoco_scan_data *sd, *temp;
+ unsigned long flags;
+ void *buf;
+ int len;
+ int type;
+
+ spin_lock_irqsave(&priv->scan_lock, flags);
+ list_for_each_entry_safe(sd, temp, &priv->scan_list, list) {
+
+ buf = sd->buf;
+ len = sd->len;
+ type = sd->type;
+
+ list_del(&sd->list);
+ spin_unlock_irqrestore(&priv->scan_lock, flags);
+ kfree(sd);
+
+ if (len > 0) {
+ if (type == HERMES_INQ_CHANNELINFO)
+ orinoco_add_extscan_result(priv, buf, len);
+ else
+ orinoco_add_hostscan_results(priv, buf, len);
+
+ kfree(buf);
+ } else {
+ /* Either abort or complete the scan */
+ orinoco_scan_done(priv, (len < 0));
+ }
+
+ spin_lock_irqsave(&priv->scan_lock, flags);
+ }
+ spin_unlock_irqrestore(&priv->scan_lock, flags);
+}
+
+void __orinoco_ev_info(struct net_device *dev, struct hermes *hw)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ u16 infofid;
+ struct {
+ __le16 len;
+ __le16 type;
+ } __packed info;
+ int len, type;
+ int err;
+
+ /* This is an answer to an INQUIRE command that we did earlier,
+ * or an information "event" generated by the card
+ * The controller return to us a pseudo frame containing
+ * the information in question - Jean II */
+ infofid = hermes_read_regn(hw, INFOFID);
+
+ /* Read the info frame header - don't try too hard */
+ err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info),
+ infofid, 0);
+ if (err) {
+ printk(KERN_ERR "%s: error %d reading info frame. "
+ "Frame dropped.\n", dev->name, err);
+ return;
+ }
+
+ len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
+ type = le16_to_cpu(info.type);
+
+ switch (type) {
+ case HERMES_INQ_TALLIES: {
+ struct hermes_tallies_frame tallies;
+ struct iw_statistics *wstats = &priv->wstats;
+
+ if (len > sizeof(tallies)) {
+ printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
+ dev->name, len);
+ len = sizeof(tallies);
+ }
+
+ err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len,
+ infofid, sizeof(info));
+ if (err)
+ break;
+
+ /* Increment our various counters */
+ /* wstats->discard.nwid - no wrong BSSID stuff */
+ wstats->discard.code +=
+ le16_to_cpu(tallies.RxWEPUndecryptable);
+ if (len == sizeof(tallies))
+ wstats->discard.code +=
+ le16_to_cpu(tallies.RxDiscards_WEPICVError) +
+ le16_to_cpu(tallies.RxDiscards_WEPExcluded);
+ wstats->discard.misc +=
+ le16_to_cpu(tallies.TxDiscardsWrongSA);
+ wstats->discard.fragment +=
+ le16_to_cpu(tallies.RxMsgInBadMsgFragments);
+ wstats->discard.retries +=
+ le16_to_cpu(tallies.TxRetryLimitExceeded);
+ /* wstats->miss.beacon - no match */
+ }
+ break;
+ case HERMES_INQ_LINKSTATUS: {
+ struct hermes_linkstatus linkstatus;
+ u16 newstatus;
+ int connected;
+
+ if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
+ break;
+
+ if (len != sizeof(linkstatus)) {
+ printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
+ dev->name, len);
+ break;
+ }
+
+ err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len,
+ infofid, sizeof(info));
+ if (err)
+ break;
+ newstatus = le16_to_cpu(linkstatus.linkstatus);
+
+ /* Symbol firmware uses "out of range" to signal that
+ * the hostscan frame can be requested. */
+ if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
+ priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
+ priv->has_hostscan && priv->scan_request) {
+ hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
+ break;
+ }
+
+ connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
+ || (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
+ || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);
+
+ if (connected)
+ netif_carrier_on(dev);
+ else if (!ignore_disconnect)
+ netif_carrier_off(dev);
+
+ if (newstatus != priv->last_linkstatus) {
+ priv->last_linkstatus = newstatus;
+ print_linkstatus(dev, newstatus);
+ /* The info frame contains only one word which is the
+ * status (see hermes.h). The status is pretty boring
+ * in itself, that's why we export the new BSSID...
+ * Jean II */
+ schedule_work(&priv->wevent_work);
+ }
+ }
+ break;
+ case HERMES_INQ_SCAN:
+ if (!priv->scan_request && priv->bssid_fixed &&
+ priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
+ schedule_work(&priv->join_work);
+ break;
+ }
+ /* fall through */
+ case HERMES_INQ_HOSTSCAN:
+ case HERMES_INQ_HOSTSCAN_SYMBOL: {
+ /* Result of a scanning. Contains information about
+ * cells in the vicinity - Jean II */
+ unsigned char *buf;
+
+ /* Sanity check */
+ if (len > 4096) {
+ printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
+ dev->name, len);
+ qabort_scan(priv);
+ break;
+ }
+
+ /* Allocate buffer for results */
+ buf = kmalloc(len, GFP_ATOMIC);
+ if (buf == NULL) {
+ /* No memory, so can't printk()... */
+ qabort_scan(priv);
+ break;
+ }
+
+ /* Read scan data */
+ err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len,
+ infofid, sizeof(info));
+ if (err) {
+ kfree(buf);
+ qabort_scan(priv);
+ break;
+ }
+
+#ifdef ORINOCO_DEBUG
+ {
+ int i;
+ printk(KERN_DEBUG "Scan result [%02X", buf[0]);
+ for (i = 1; i < (len * 2); i++)
+ printk(":%02X", buf[i]);
+ printk("]\n");
+ }
+#endif /* ORINOCO_DEBUG */
+
+ qbuf_scan(priv, buf, len, type);
+ }
+ break;
+ case HERMES_INQ_CHANNELINFO:
+ {
+ struct agere_ext_scan_info *bss;
+
+ if (!priv->scan_request) {
+ printk(KERN_DEBUG "%s: Got chaninfo without scan, "
+ "len=%d\n", dev->name, len);
+ break;
+ }
+
+ /* An empty result indicates that the scan is complete */
+ if (len == 0) {
+ qbuf_scan(priv, NULL, len, type);
+ break;
+ }
+
+ /* Sanity check */
+ else if (len < (offsetof(struct agere_ext_scan_info,
+ data) + 2)) {
+ /* Drop this result now so we don't have to
+ * keep checking later */
+ printk(KERN_WARNING
+ "%s: Ext scan results too short (%d bytes)\n",
+ dev->name, len);
+ break;
+ }
+
+ bss = kmalloc(len, GFP_ATOMIC);
+ if (bss == NULL)
+ break;
+
+ /* Read scan data */
+ err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len,
+ infofid, sizeof(info));
+ if (err)
+ kfree(bss);
+ else
+ qbuf_scan(priv, bss, len, type);
+
+ break;
+ }
+ case HERMES_INQ_SEC_STAT_AGERE:
+ /* Security status (Agere specific) */
+ /* Ignore this frame for now */
+ if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
+ break;
+ /* fall through */
+ default:
+ printk(KERN_DEBUG "%s: Unknown information frame received: "
+ "type 0x%04x, length %d\n", dev->name, type, len);
+ /* We don't actually do anything about it */
+ break;
+ }
+}
+EXPORT_SYMBOL(__orinoco_ev_info);
+
+static void __orinoco_ev_infdrop(struct net_device *dev, struct hermes *hw)
+{
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
+}
+
+/********************************************************************/
+/* Internal hardware control routines */
+/********************************************************************/
+
+static int __orinoco_up(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ int err;
+
+ netif_carrier_off(dev); /* just to make sure */
+
+ err = __orinoco_commit(priv);
+ if (err) {
+ printk(KERN_ERR "%s: Error %d configuring card\n",
+ dev->name, err);
+ return err;
+ }
+
+ /* Fire things up again */
+ hermes_set_irqmask(hw, ORINOCO_INTEN);
+ err = hermes_enable_port(hw, 0);
+ if (err) {
+ printk(KERN_ERR "%s: Error %d enabling MAC port\n",
+ dev->name, err);
+ return err;
+ }
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static int __orinoco_down(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ int err;
+
+ netif_stop_queue(dev);
+
+ if (!priv->hw_unavailable) {
+ if (!priv->broken_disableport) {
+ err = hermes_disable_port(hw, 0);
+ if (err) {
+ /* Some firmwares (e.g. Intersil 1.3.x) seem
+ * to have problems disabling the port, oh
+ * well, too bad. */
+ printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
+ dev->name, err);
+ priv->broken_disableport = 1;
+ }
+ }
+ hermes_set_irqmask(hw, 0);
+ hermes_write_regn(hw, EVACK, 0xffff);
+ }
+
+ orinoco_scan_done(priv, true);
+
+ /* firmware will have to reassociate */
+ netif_carrier_off(dev);
+ priv->last_linkstatus = 0xffff;
+
+ return 0;
+}
+
+static int orinoco_reinit_firmware(struct orinoco_private *priv)
+{
+ struct hermes *hw = &priv->hw;
+ int err;
+
+ err = hw->ops->init(hw);
+ if (priv->do_fw_download && !err) {
+ err = orinoco_download(priv);
+ if (err)
+ priv->do_fw_download = 0;
+ }
+ if (!err)
+ err = orinoco_hw_allocate_fid(priv);
+
+ return err;
+}
+
+static int
+__orinoco_set_multicast_list(struct net_device *dev)
+{
+ struct orinoco_private *priv = ndev_priv(dev);
+ int err = 0;
+ int promisc, mc_count;
+
+ /* The Hermes doesn't seem to have an allmulti mode, so we go
+ * into promiscuous mode and let the upper levels deal. */
+ if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
+ (netdev_mc_count(dev) > MAX_MULTICAST(priv))) {
+ promisc = 1;
+ mc_count = 0;
+ } else {
+ promisc = 0;
+ mc_count = netdev_mc_count(dev);
+ }
+
+ err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc);
+
+ return err;
+}
+
+/* This must be called from user context, without locks held - use
+ * schedule_work() */
+void orinoco_reset(struct work_struct *work)
+{
+ struct orinoco_private *priv =
+ container_of(work, struct orinoco_private, reset_work);
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ int err;
+ unsigned long flags;
+
+ if (orinoco_lock(priv, &flags) != 0)
+ /* When the hardware becomes available again, whatever
+ * detects that is responsible for re-initializing
+ * it. So no need for anything further */
+ return;
+
+ netif_stop_queue(dev);
+
+ /* Shut off interrupts. Depending on what state the hardware
+ * is in, this might not work, but we'll try anyway */
+ hermes_set_irqmask(hw, 0);
+ hermes_write_regn(hw, EVACK, 0xffff);
+
+ priv->hw_unavailable++;
+ priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
+ netif_carrier_off(dev);
+
+ orinoco_unlock(priv, &flags);
+
+ /* Scanning support: Notify scan cancellation */
+ orinoco_scan_done(priv, true);
+
+ if (priv->hard_reset) {
+ err = (*priv->hard_reset)(priv);
+ if (err) {
+ printk(KERN_ERR "%s: orinoco_reset: Error %d "
+ "performing hard reset\n", dev->name, err);
+ goto disable;
+ }
+ }
+
+ err = orinoco_reinit_firmware(priv);
+ if (err) {
+ printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
+ dev->name, err);
+ goto disable;
+ }
+
+ /* This has to be called from user context */
+ orinoco_lock_irq(priv);
+
+ priv->hw_unavailable--;
+
+ /* priv->open or priv->hw_unavailable might have changed while
+ * we dropped the lock */
+ if (priv->open && (!priv->hw_unavailable)) {
+ err = __orinoco_up(priv);
+ if (err) {
+ printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
+ dev->name, err);
+ } else
+ dev->trans_start = jiffies;
+ }
+
+ orinoco_unlock_irq(priv);
+
+ return;
+ disable:
+ hermes_set_irqmask(hw, 0);
+ netif_device_detach(dev);
+ printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
+}
+
+static int __orinoco_commit(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ int err = 0;
+
+ /* If we've called commit, we are reconfiguring or bringing the
+ * interface up. Maintaining countermeasures across this would
+ * be confusing, so note that we've disabled them. The port will
+ * be enabled later in orinoco_commit or __orinoco_up. */
+ priv->tkip_cm_active = 0;
+
+ err = orinoco_hw_program_rids(priv);
+
+ /* FIXME: what about netif_tx_lock */
+ (void) __orinoco_set_multicast_list(dev);
+
+ return err;
+}
+
+/* Ensures configuration changes are applied. May result in a reset.
+ * The caller should hold priv->lock
+ */
+int orinoco_commit(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ int err;
+
+ if (priv->broken_disableport) {
+ schedule_work(&priv->reset_work);
+ return 0;
+ }
+
+ err = hermes_disable_port(hw, 0);
+ if (err) {
+ printk(KERN_WARNING "%s: Unable to disable port "
+ "while reconfiguring card\n", dev->name);
+ priv->broken_disableport = 1;
+ goto out;
+ }
+
+ err = __orinoco_commit(priv);
+ if (err) {
+ printk(KERN_WARNING "%s: Unable to reconfigure card\n",
+ dev->name);
+ goto out;
+ }
+
+ err = hermes_enable_port(hw, 0);
+ if (err) {
+ printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n",
+ dev->name);
+ goto out;
+ }
+
+ out:
+ if (err) {
+ printk(KERN_WARNING "%s: Resetting instead...\n", dev->name);
+ schedule_work(&priv->reset_work);
+ err = 0;
+ }
+ return err;
+}
+
+/********************************************************************/
+/* Interrupt handler */
+/********************************************************************/
+
+static void __orinoco_ev_tick(struct net_device *dev, struct hermes *hw)
+{
+ printk(KERN_DEBUG "%s: TICK\n", dev->name);
+}
+
+static void __orinoco_ev_wterr(struct net_device *dev, struct hermes *hw)
+{
+ /* This seems to happen a fair bit under load, but ignoring it
+ seems to work fine...*/
+ printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
+ dev->name);
+}
+
+irqreturn_t orinoco_interrupt(int irq, void *dev_id)
+{
+ struct orinoco_private *priv = dev_id;
+ struct net_device *dev = priv->ndev;
+ struct hermes *hw = &priv->hw;
+ int count = MAX_IRQLOOPS_PER_IRQ;
+ u16 evstat, events;
+ /* These are used to detect a runaway interrupt situation.
+ *
+ * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
+ * we panic and shut down the hardware
+ */
+ /* jiffies value the last time we were called */
+ static int last_irq_jiffy; /* = 0 */
+ static int loops_this_jiffy; /* = 0 */
+ unsigned long flags;
+
+ if (orinoco_lock(priv, &flags) != 0) {
+ /* If hw is unavailable - we don't know if the irq was
+ * for us or not */
+ return IRQ_HANDLED;
+ }
+
+ evstat = hermes_read_regn(hw, EVSTAT);
+ events = evstat & hw->inten;
+ if (!events) {
+ orinoco_unlock(priv, &flags);
+ return IRQ_NONE;
+ }
+
+ if (jiffies != last_irq_jiffy)
+ loops_this_jiffy = 0;
+ last_irq_jiffy = jiffies;
+
+ while (events && count--) {
+ if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
+ printk(KERN_WARNING "%s: IRQ handler is looping too "
+ "much! Resetting.\n", dev->name);
+ /* Disable interrupts for now */
+ hermes_set_irqmask(hw, 0);
+ schedule_work(&priv->reset_work);
+ break;
+ }
+
+ /* Check the card hasn't been removed */
+ if (!hermes_present(hw)) {
+ DEBUG(0, "orinoco_interrupt(): card removed\n");
+ break;
+ }
+
+ if (events & HERMES_EV_TICK)
+ __orinoco_ev_tick(dev, hw);
+ if (events & HERMES_EV_WTERR)
+ __orinoco_ev_wterr(dev, hw);
+ if (events & HERMES_EV_INFDROP)
+ __orinoco_ev_infdrop(dev, hw);
+ if (events & HERMES_EV_INFO)
+ __orinoco_ev_info(dev, hw);
+ if (events & HERMES_EV_RX)
+ __orinoco_ev_rx(dev, hw);
+ if (events & HERMES_EV_TXEXC)
+ __orinoco_ev_txexc(dev, hw);
+ if (events & HERMES_EV_TX)
+ __orinoco_ev_tx(dev, hw);
+ if (events & HERMES_EV_ALLOC)
+ __orinoco_ev_alloc(dev, hw);
+
+ hermes_write_regn(hw, EVACK, evstat);
+
+ evstat = hermes_read_regn(hw, EVSTAT);
+ events = evstat & hw->inten;
+ }
+
+ orinoco_unlock(priv, &flags);
+ return IRQ_HANDLED;
+}
+EXPORT_SYMBOL(orinoco_interrupt);
+
+/********************************************************************/
+/* Power management */
+/********************************************************************/
+#if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
+static int orinoco_pm_notifier(struct notifier_block *notifier,
+ unsigned long pm_event,
+ void *unused)
+{
+ struct orinoco_private *priv = container_of(notifier,
+ struct orinoco_private,
+ pm_notifier);
+
+ /* All we need to do is cache the firmware before suspend, and
+ * release it when we come out.
+ *
+ * Only need to do this if we're downloading firmware. */
+ if (!priv->do_fw_download)
+ return NOTIFY_DONE;
+
+ switch (pm_event) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ orinoco_cache_fw(priv, 0);
+ break;
+
+ case PM_POST_RESTORE:
+ /* Restore from hibernation failed. We need to clean
+ * up in exactly the same way, so fall through. */
+ case PM_POST_HIBERNATION:
+ case PM_POST_SUSPEND:
+ orinoco_uncache_fw(priv);
+ break;
+
+ case PM_RESTORE_PREPARE:
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static void orinoco_register_pm_notifier(struct orinoco_private *priv)
+{
+ priv->pm_notifier.notifier_call = orinoco_pm_notifier;
+ register_pm_notifier(&priv->pm_notifier);
+}
+
+static void orinoco_unregister_pm_notifier(struct orinoco_private *priv)
+{
+ unregister_pm_notifier(&priv->pm_notifier);
+}
+#else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
+#define orinoco_register_pm_notifier(priv) do { } while (0)
+#define orinoco_unregister_pm_notifier(priv) do { } while (0)
+#endif
+
+/********************************************************************/
+/* Initialization */
+/********************************************************************/
+
+int orinoco_init(struct orinoco_private *priv)
+{
+ struct device *dev = priv->dev;
+ struct wiphy *wiphy = priv_to_wiphy(priv);
+ struct hermes *hw = &priv->hw;
+ int err = 0;
+
+ /* No need to lock, the hw_unavailable flag is already set in
+ * alloc_orinocodev() */
+ priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN;
+
+ /* Initialize the firmware */
+ err = hw->ops->init(hw);
+ if (err != 0) {
+ dev_err(dev, "Failed to initialize firmware (err = %d)\n",
+ err);
+ goto out;
+ }
+
+ err = determine_fw_capabilities(priv, wiphy->fw_version,
+ sizeof(wiphy->fw_version),
+ &wiphy->hw_version);
+ if (err != 0) {
+ dev_err(dev, "Incompatible firmware, aborting\n");
+ goto out;
+ }
+
+ if (priv->do_fw_download) {
+#ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
+ orinoco_cache_fw(priv, 0);
+#endif
+
+ err = orinoco_download(priv);
+ if (err)
+ priv->do_fw_download = 0;
+
+ /* Check firmware version again */
+ err = determine_fw_capabilities(priv, wiphy->fw_version,
+ sizeof(wiphy->fw_version),
+ &wiphy->hw_version);
+ if (err != 0) {
+ dev_err(dev, "Incompatible firmware, aborting\n");
+ goto out;
+ }
+ }
+
+ if (priv->has_port3)
+ dev_info(dev, "Ad-hoc demo mode supported\n");
+ if (priv->has_ibss)
+ dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n");
+ if (priv->has_wep)
+ dev_info(dev, "WEP supported, %s-bit key\n",
+ priv->has_big_wep ? "104" : "40");
+ if (priv->has_wpa) {
+ dev_info(dev, "WPA-PSK supported\n");
+ if (orinoco_mic_init(priv)) {
+ dev_err(dev, "Failed to setup MIC crypto algorithm. "
+ "Disabling WPA support\n");
+ priv->has_wpa = 0;
+ }
+ }
+
+ err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr);
+ if (err)
+ goto out;
+
+ err = orinoco_hw_allocate_fid(priv);
+ if (err) {
+ dev_err(dev, "Failed to allocate NIC buffer!\n");
+ goto out;
+ }
+
+ /* Set up the default configuration */
+ priv->iw_mode = NL80211_IFTYPE_STATION;
+ /* By default use IEEE/IBSS ad-hoc mode if we have it */
+ priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss);
+ set_port_type(priv);
+ priv->channel = 0; /* use firmware default */
+
+ priv->promiscuous = 0;
+ priv->encode_alg = ORINOCO_ALG_NONE;
+ priv->tx_key = 0;
+ priv->wpa_enabled = 0;
+ priv->tkip_cm_active = 0;
+ priv->key_mgmt = 0;
+ priv->wpa_ie_len = 0;
+ priv->wpa_ie = NULL;
+
+ if (orinoco_wiphy_register(wiphy)) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ /* Make the hardware available, as long as it hasn't been
+ * removed elsewhere (e.g. by PCMCIA hot unplug) */
+ orinoco_lock_irq(priv);
+ priv->hw_unavailable--;
+ orinoco_unlock_irq(priv);
+
+ dev_dbg(dev, "Ready\n");
+
+ out:
+ return err;
+}
+EXPORT_SYMBOL(orinoco_init);
+
+static const struct net_device_ops orinoco_netdev_ops = {
+ .ndo_open = orinoco_open,
+ .ndo_stop = orinoco_stop,
+ .ndo_start_xmit = orinoco_xmit,
+ .ndo_set_rx_mode = orinoco_set_multicast_list,
+ .ndo_change_mtu = orinoco_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_tx_timeout = orinoco_tx_timeout,
+ .ndo_get_stats = orinoco_get_stats,
+};
+
+/* Allocate private data.
+ *
+ * This driver has a number of structures associated with it
+ * netdev - Net device structure for each network interface
+ * wiphy - structure associated with wireless phy
+ * wireless_dev (wdev) - structure for each wireless interface
+ * hw - structure for hermes chip info
+ * card - card specific structure for use by the card driver
+ * (airport, orinoco_cs)
+ * priv - orinoco private data
+ * device - generic linux device structure
+ *
+ * +---------+ +---------+
+ * | wiphy | | netdev |
+ * | +-------+ | +-------+
+ * | | priv | | | wdev |
+ * | | +-----+ +-+-------+
+ * | | | hw |
+ * | +-+-----+
+ * | | card |
+ * +-+-------+
+ *
+ * priv has a link to netdev and device
+ * wdev has a link to wiphy
+ */
+struct orinoco_private
+*alloc_orinocodev(int sizeof_card,
+ struct device *device,
+ int (*hard_reset)(struct orinoco_private *),
+ int (*stop_fw)(struct orinoco_private *, int))
+{
+ struct orinoco_private *priv;
+ struct wiphy *wiphy;
+
+ /* allocate wiphy
+ * NOTE: We only support a single virtual interface
+ * but this may change when monitor mode is added
+ */
+ wiphy = wiphy_new(&orinoco_cfg_ops,
+ sizeof(struct orinoco_private) + sizeof_card);
+ if (!wiphy)
+ return NULL;
+
+ priv = wiphy_priv(wiphy);
+ priv->dev = device;
+
+ if (sizeof_card)
+ priv->card = (void *)((unsigned long)priv
+ + sizeof(struct orinoco_private));
+ else
+ priv->card = NULL;
+
+ orinoco_wiphy_init(wiphy);
+
+#ifdef WIRELESS_SPY
+ priv->wireless_data.spy_data = &priv->spy_data;
+#endif
+
+ /* Set up default callbacks */
+ priv->hard_reset = hard_reset;
+ priv->stop_fw = stop_fw;
+
+ spin_lock_init(&priv->lock);
+ priv->open = 0;
+ priv->hw_unavailable = 1; /* orinoco_init() must clear this
+ * before anything else touches the
+ * hardware */
+ INIT_WORK(&priv->reset_work, orinoco_reset);
+ INIT_WORK(&priv->join_work, orinoco_join_ap);
+ INIT_WORK(&priv->wevent_work, orinoco_send_wevents);
+
+ INIT_LIST_HEAD(&priv->rx_list);
+ tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet,
+ (unsigned long) priv);
+
+ spin_lock_init(&priv->scan_lock);
+ INIT_LIST_HEAD(&priv->scan_list);
+ INIT_WORK(&priv->process_scan, orinoco_process_scan_results);
+
+ priv->last_linkstatus = 0xffff;
+
+#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
+ priv->cached_pri_fw = NULL;
+ priv->cached_fw = NULL;
+#endif
+
+ /* Register PM notifiers */
+ orinoco_register_pm_notifier(priv);
+
+ return priv;
+}
+EXPORT_SYMBOL(alloc_orinocodev);
+
+/* We can only support a single interface. We provide a separate
+ * function to set it up to distinguish between hardware
+ * initialisation and interface setup.
+ *
+ * The base_addr and irq parameters are passed on to netdev for use
+ * with SIOCGIFMAP.
+ */
+int orinoco_if_add(struct orinoco_private *priv,
+ unsigned long base_addr,
+ unsigned int irq,
+ const struct net_device_ops *ops)
+{
+ struct wiphy *wiphy = priv_to_wiphy(priv);
+ struct wireless_dev *wdev;
+ struct net_device *dev;
+ int ret;
+
+ dev = alloc_etherdev(sizeof(struct wireless_dev));
+
+ if (!dev)
+ return -ENOMEM;
+
+ /* Initialise wireless_dev */
+ wdev = netdev_priv(dev);
+ wdev->wiphy = wiphy;
+ wdev->iftype = NL80211_IFTYPE_STATION;
+
+ /* Setup / override net_device fields */
+ dev->ieee80211_ptr = wdev;
+ dev->watchdog_timeo = HZ; /* 1 second timeout */
+ dev->wireless_handlers = &orinoco_handler_def;
+#ifdef WIRELESS_SPY
+ dev->wireless_data = &priv->wireless_data;
+#endif
+ /* Default to standard ops if not set */
+ if (ops)
+ dev->netdev_ops = ops;
+ else
+ dev->netdev_ops = &orinoco_netdev_ops;
+
+ /* we use the default eth_mac_addr for setting the MAC addr */
+
+ /* Reserve space in skb for the SNAP header */
+ dev->needed_headroom = ENCAPS_OVERHEAD;
+
+ netif_carrier_off(dev);
+
+ memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
+
+ dev->base_addr = base_addr;
+ dev->irq = irq;
+
+ SET_NETDEV_DEV(dev, priv->dev);
+ ret = register_netdev(dev);
+ if (ret)
+ goto fail;
+
+ priv->ndev = dev;
+
+ /* Report what we've done */
+ dev_dbg(priv->dev, "Registerred interface %s.\n", dev->name);
+
+ return 0;
+
+ fail:
+ free_netdev(dev);
+ return ret;
+}
+EXPORT_SYMBOL(orinoco_if_add);
+
+void orinoco_if_del(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+
+ unregister_netdev(dev);
+ free_netdev(dev);
+}
+EXPORT_SYMBOL(orinoco_if_del);
+
+void free_orinocodev(struct orinoco_private *priv)
+{
+ struct wiphy *wiphy = priv_to_wiphy(priv);
+ struct orinoco_rx_data *rx_data, *temp;
+ struct orinoco_scan_data *sd, *sdtemp;
+
+ wiphy_unregister(wiphy);
+
+ /* If the tasklet is scheduled when we call tasklet_kill it
+ * will run one final time. However the tasklet will only
+ * drain priv->rx_list if the hw is still available. */
+ tasklet_kill(&priv->rx_tasklet);
+
+ /* Explicitly drain priv->rx_list */
+ list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
+ list_del(&rx_data->list);
+
+ dev_kfree_skb(rx_data->skb);
+ kfree(rx_data->desc);
+ kfree(rx_data);
+ }
+
+ cancel_work_sync(&priv->process_scan);
+ /* Explicitly drain priv->scan_list */
+ list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) {
+ list_del(&sd->list);
+
+ if (sd->len > 0)
+ kfree(sd->buf);
+ kfree(sd);
+ }
+
+ orinoco_unregister_pm_notifier(priv);
+ orinoco_uncache_fw(priv);
+
+ priv->wpa_ie_len = 0;
+ kfree(priv->wpa_ie);
+ orinoco_mic_free(priv);
+ wiphy_free(wiphy);
+}
+EXPORT_SYMBOL(free_orinocodev);
+
+int orinoco_up(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ unsigned long flags;
+ int err;
+
+ priv->hw.ops->lock_irqsave(&priv->lock, &flags);
+
+ err = orinoco_reinit_firmware(priv);
+ if (err) {
+ printk(KERN_ERR "%s: Error %d re-initializing firmware\n",
+ dev->name, err);
+ goto exit;
+ }
+
+ netif_device_attach(dev);
+ priv->hw_unavailable--;
+
+ if (priv->open && !priv->hw_unavailable) {
+ err = __orinoco_up(priv);
+ if (err)
+ printk(KERN_ERR "%s: Error %d restarting card\n",
+ dev->name, err);
+ }
+
+exit:
+ priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(orinoco_up);
+
+void orinoco_down(struct orinoco_private *priv)
+{
+ struct net_device *dev = priv->ndev;
+ unsigned long flags;
+ int err;
+
+ priv->hw.ops->lock_irqsave(&priv->lock, &flags);
+ err = __orinoco_down(priv);
+ if (err)
+ printk(KERN_WARNING "%s: Error %d downing interface\n",
+ dev->name, err);
+
+ netif_device_detach(dev);
+ priv->hw_unavailable++;
+ priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
+}
+EXPORT_SYMBOL(orinoco_down);
+
+/********************************************************************/
+/* Module initialization */
+/********************************************************************/
+
+/* Can't be declared "const" or the whole __initdata section will
+ * become const */
+static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
+ " (David Gibson <hermes@gibson.dropbear.id.au>, "
+ "Pavel Roskin <proski@gnu.org>, et al)";
+
+static int __init init_orinoco(void)
+{
+ printk(KERN_DEBUG "%s\n", version);
+ return 0;
+}
+
+static void __exit exit_orinoco(void)
+{
+}
+
+module_init(init_orinoco);
+module_exit(exit_orinoco);
Code Review / kvmfornfv.git / blobdiff