OpenCloudOS-Kernel/drivers/net/wireless/orinoco/main.c

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/* 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/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/suspend.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/ieee80211.h>
#include <net/iw_handler.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 "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 int 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 SYMBOL_MAX_VER_LEN (14)
#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 TX_NICBUF_SIZE_BUG 1585 /* Bug in Symbol firmware */
#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)
static const struct ethtool_ops orinoco_ethtool_ops;
/********************************************************************/
/* 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];
} __attribute__ ((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;
} __attribute__ ((packed));
struct orinoco_rx_data {
struct hermes_rx_descriptor *desc;
struct sk_buff *skb;
struct list_head list;
};
/********************************************************************/
/* Function prototypes */
/********************************************************************/
static void __orinoco_set_multicast_list(struct net_device *dev);
/********************************************************************/
/* Internal helper functions */
/********************************************************************/
void set_port_type(struct orinoco_private *priv)
{
switch (priv->iw_mode) {
case IW_MODE_INFRA:
priv->port_type = 1;
priv->createibss = 0;
break;
case IW_MODE_ADHOC:
if (priv->prefer_port3) {
priv->port_type = 3;
priv->createibss = 0;
} else {
priv->port_type = priv->ibss_port;
priv->createibss = 1;
}
break;
case IW_MODE_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 */
/********************************************************************/
static int orinoco_open(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
unsigned long flags;
int err;
if (orinoco_lock(priv, &flags) != 0)
return -EBUSY;
err = __orinoco_up(dev);
if (!err)
priv->open = 1;
orinoco_unlock(priv, &flags);
return err;
}
static int orinoco_stop(struct net_device *dev)
{
struct orinoco_private *priv = netdev_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) */
spin_lock_irq(&priv->lock);
priv->open = 0;
err = __orinoco_down(dev);
spin_unlock_irq(&priv->lock);
return err;
}
static struct net_device_stats *orinoco_get_stats(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
return &priv->stats;
}
static void orinoco_set_multicast_list(struct net_device *dev)
{
struct orinoco_private *priv = netdev_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);
}
static int orinoco_change_mtu(struct net_device *dev, int new_mtu)
{
struct orinoco_private *priv = netdev_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;
}
/********************************************************************/
/* Tx path */
/********************************************************************/
static int orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
struct net_device_stats *stats = &priv->stats;
hermes_t *hw = &priv->hw;
int err = 0;
u16 txfid = priv->txfid;
struct ethhdr *eh;
int tx_control;
unsigned long flags;
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 == IW_MODE_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;
if (priv->encode_alg == IW_ENCODE_ALG_TKIP)
tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
HERMES_TXCTRL_MIC;
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 = hermes_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 = hermes_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);
}
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 */
} __attribute__ ((packed)) hdr;
/* Strip destination and source from the data */
skb_pull(skb, 2 * ETH_ALEN);
/* And move them to a separate header */
memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
hdr.eth.h_proto = htons(sizeof(encaps_hdr) + skb->len);
memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));
/* Insert the SNAP header */
if (skb_headroom(skb) < sizeof(hdr)) {
printk(KERN_ERR
"%s: Not enough headroom for 802.2 headers %d\n",
dev->name, skb_headroom(skb));
goto drop;
}
eh = (struct ethhdr *) skb_push(skb, sizeof(hdr));
memcpy(eh, &hdr, sizeof(hdr));
}
err = hermes_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;
}
/* Calculate Michael MIC */
if (priv->encode_alg == IW_ENCODE_ALG_TKIP) {
u8 mic_buf[MICHAEL_MIC_LEN + 1];
u8 *mic;
size_t offset;
size_t len;
if (skb->len % 2) {
/* MIC start is on an odd boundary */
mic_buf[0] = skb->data[skb->len - 1];
mic = &mic_buf[1];
offset = skb->len - 1;
len = MICHAEL_MIC_LEN + 1;
} else {
mic = &mic_buf[0];
offset = skb->len;
len = MICHAEL_MIC_LEN;
}
orinoco_mic(priv->tx_tfm_mic,
priv->tkip_key[priv->tx_key].tx_mic,
eh->h_dest, eh->h_source, 0 /* priority */,
skb->data + ETH_HLEN, skb->len - ETH_HLEN, mic);
/* Write the MIC */
err = hermes_bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
txfid, HERMES_802_3_OFFSET + 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 = hermes_docmd_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;
}
dev->trans_start = jiffies;
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, hermes_t *hw)
{
struct orinoco_private *priv = netdev_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, hermes_t *hw)
{
struct orinoco_private *priv = netdev_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, hermes_t *hw)
{
struct orinoco_private *priv = netdev_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 = hermes_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);
}
static void orinoco_tx_timeout(struct net_device *dev)
{
struct orinoco_private *priv = netdev_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);
}
/********************************************************************/
/* 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 = netdev_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 = netdev_priv(dev);
struct net_device_stats *stats = &priv->stats;
hermes_t *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 = hermes_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++;
}
static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
{
struct orinoco_private *priv = netdev_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) {
printk(KERN_WARNING
"%s: Can't allocate space for RX descriptor\n",
dev->name);
goto update_stats;
}
rxfid = hermes_read_regn(hw, RXFID);
err = hermes_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 == IW_MODE_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 = hermes_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) {
printk(KERN_WARNING "%s: Can't allocate RX packet\n",
dev->name);
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);
}
static void orinoco_rx(struct net_device *dev,
struct hermes_rx_descriptor *desc,
struct sk_buff *skb)
{
struct orinoco_private *priv = netdev_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) {
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;
orinoco_mic(priv->rx_tfm_mic,
priv->tkip_key[key_id].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 net_device *dev = (struct net_device *) data;
struct orinoco_private *priv = netdev_priv(dev);
struct orinoco_rx_data *rx_data, *temp;
struct hermes_rx_descriptor *desc;
struct sk_buff *skb;
orinoco: take the driver lock in the rx tasklet Fix the warning reproduced below. We add to rx_list in interrupt context and remove elements in tasklet context. While removing elements we need to prevent the interrupt modifying the list. Note that "orinoco: Process bulk of receive interrupt in a tasklet" did not preserve locking semantics on what is now orinoco_rx. This patch reinstates the locking semantics and ensures it covers rx_list as well. This leads to additional cleanup required in free_orinocodev. [89479.105038] WARNING: at lib/list_debug.c:30 __list_add+0x8f/0xa0() [89479.105058] list_add corruption. prev->next should be next (dddb3568), but was cbc28978. (prev=dddb3568). [89479.106002] Pid: 15746, comm: X Not tainted 2.6.28-1avb #26 [89479.106020] Call Trace: [89479.106062] [<c011d3b0>] warn_slowpath+0x60/0x80 [89479.106104] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106194] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106218] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106254] [<c02f9c9d>] ? _spin_unlock+0x1d/0x20 [89479.106270] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106302] [<c01ff2a7>] ? delay_tsc+0x17/0x24 [89479.106319] [<c01ff221>] ? __const_udelay+0x21/0x30 [89479.106376] [<dfa8b1e2>] ? hermes_bap_seek+0x112/0x1e0 [hermes] [89479.106396] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106418] [<c018e307>] ? __kmalloc_track_caller+0xb7/0x110 [89479.106448] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106465] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106482] [<c020e13f>] __list_add+0x8f/0xa0 [89479.106551] [<dfd0fcae>] orinoco_interrupt+0xcae/0x16c0 [orinoco] [89479.106574] [<c013b0e3>] ? tick_dev_program_event+0x33/0xb0 [89479.106594] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106613] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106662] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106892] [<dfe7faa7>] ? usb_hcd_irq+0x97/0xa0 [usbcore] [89479.106926] [<c015ba79>] handle_IRQ_event+0x29/0x60 [89479.106947] [<c015cf89>] handle_level_irq+0x69/0xe0 [89479.106963] [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.106977] <IRQ> [<c02ca933>] ? tcp_v4_rcv+0x633/0x6e0 [89479.107025] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107057] [<c02a0000>] ? sk_run_filter+0x320/0x7a0 [89479.107078] [<c020e041>] ? list_del+0x21/0x90 [89479.107106] [<dfd0d24e>] ? orinoco_rx_isr_tasklet+0x2ce/0x480 [orinoco] [89479.107131] [<c01402e0>] ? __lock_acquire+0x160/0x1650 [89479.107151] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.107169] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.107200] [<c012249a>] ? irq_enter+0xa/0x60 [89479.107217] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107518] [<c010342c>] ? restore_nocheck_notrace+0x0/0xe [89479.107542] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107561] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107583] [<c01ff678>] ? trace_hardirqs_on_thunk+0xc/0x10 [89479.107602] [<c0122087>] ? tasklet_action+0x27/0x90 [89479.107620] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107638] [<c01220a3>] ? tasklet_action+0x43/0x90 [89479.107655] [<c012289f>] ? __do_softirq+0x6f/0x110 [89479.107674] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107685] <IRQ> [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.107715] [<c012246d>] ? irq_exit+0x5d/0x80 [89479.107732] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107747] [<c0103337>] ? sysenter_exit+0xf/0x16 [89479.107765] [<c013f83d>] ? trace_hardirqs_on_caller+0xfd/0x140 [89479.107782] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107797] ---[ end trace a1fc0a52df4a729d ]--- Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-07 08:23:55 +08:00
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: take the driver lock in the rx tasklet Fix the warning reproduced below. We add to rx_list in interrupt context and remove elements in tasklet context. While removing elements we need to prevent the interrupt modifying the list. Note that "orinoco: Process bulk of receive interrupt in a tasklet" did not preserve locking semantics on what is now orinoco_rx. This patch reinstates the locking semantics and ensures it covers rx_list as well. This leads to additional cleanup required in free_orinocodev. [89479.105038] WARNING: at lib/list_debug.c:30 __list_add+0x8f/0xa0() [89479.105058] list_add corruption. prev->next should be next (dddb3568), but was cbc28978. (prev=dddb3568). [89479.106002] Pid: 15746, comm: X Not tainted 2.6.28-1avb #26 [89479.106020] Call Trace: [89479.106062] [<c011d3b0>] warn_slowpath+0x60/0x80 [89479.106104] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106194] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106218] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106254] [<c02f9c9d>] ? _spin_unlock+0x1d/0x20 [89479.106270] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106302] [<c01ff2a7>] ? delay_tsc+0x17/0x24 [89479.106319] [<c01ff221>] ? __const_udelay+0x21/0x30 [89479.106376] [<dfa8b1e2>] ? hermes_bap_seek+0x112/0x1e0 [hermes] [89479.106396] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106418] [<c018e307>] ? __kmalloc_track_caller+0xb7/0x110 [89479.106448] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106465] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106482] [<c020e13f>] __list_add+0x8f/0xa0 [89479.106551] [<dfd0fcae>] orinoco_interrupt+0xcae/0x16c0 [orinoco] [89479.106574] [<c013b0e3>] ? tick_dev_program_event+0x33/0xb0 [89479.106594] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106613] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106662] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106892] [<dfe7faa7>] ? usb_hcd_irq+0x97/0xa0 [usbcore] [89479.106926] [<c015ba79>] handle_IRQ_event+0x29/0x60 [89479.106947] [<c015cf89>] handle_level_irq+0x69/0xe0 [89479.106963] [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.106977] <IRQ> [<c02ca933>] ? tcp_v4_rcv+0x633/0x6e0 [89479.107025] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107057] [<c02a0000>] ? sk_run_filter+0x320/0x7a0 [89479.107078] [<c020e041>] ? list_del+0x21/0x90 [89479.107106] [<dfd0d24e>] ? orinoco_rx_isr_tasklet+0x2ce/0x480 [orinoco] [89479.107131] [<c01402e0>] ? __lock_acquire+0x160/0x1650 [89479.107151] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.107169] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.107200] [<c012249a>] ? irq_enter+0xa/0x60 [89479.107217] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107518] [<c010342c>] ? restore_nocheck_notrace+0x0/0xe [89479.107542] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107561] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107583] [<c01ff678>] ? trace_hardirqs_on_thunk+0xc/0x10 [89479.107602] [<c0122087>] ? tasklet_action+0x27/0x90 [89479.107620] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107638] [<c01220a3>] ? tasklet_action+0x43/0x90 [89479.107655] [<c012289f>] ? __do_softirq+0x6f/0x110 [89479.107674] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107685] <IRQ> [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.107715] [<c012246d>] ? irq_exit+0x5d/0x80 [89479.107732] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107747] [<c0103337>] ? sysenter_exit+0xf/0x16 [89479.107765] [<c013f83d>] ? trace_hardirqs_on_caller+0xfd/0x140 [89479.107782] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107797] ---[ end trace a1fc0a52df4a729d ]--- Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-07 08:23:55 +08:00
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;
} __attribute__ ((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 = hermes_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 = hermes_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 = hermes_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 = hermes_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 __orinoco_ev_info(struct net_device *dev, hermes_t *hw)
{
struct orinoco_private *priv = netdev_priv(dev);
u16 infofid;
struct {
__le16 len;
__le16 type;
} __attribute__ ((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 = hermes_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 = hermes_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 == IW_MODE_MONITOR)
break;
if (len != sizeof(linkstatus)) {
printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
dev->name, len);
break;
}
err = hermes_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_inprogress) {
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_inprogress && 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 */
union iwreq_data wrqu;
unsigned char *buf;
/* Scan is no longer in progress */
priv->scan_inprogress = 0;
/* Sanity check */
if (len > 4096) {
printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
dev->name, len);
break;
}
/* Allocate buffer for results */
buf = kmalloc(len, GFP_ATOMIC);
if (buf == NULL)
/* No memory, so can't printk()... */
break;
/* Read scan data */
err = hermes_bap_pread(hw, IRQ_BAP, (void *) buf, len,
infofid, sizeof(info));
if (err) {
kfree(buf);
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 */
if (orinoco_process_scan_results(priv, buf, len) == 0) {
/* Send an empty event to user space.
* We don't send the received data on the event because
* it would require us to do complex transcoding, and
* we want to minimise the work done in the irq handler
* Use a request to extract the data - Jean II */
wrqu.data.length = 0;
wrqu.data.flags = 0;
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
}
kfree(buf);
}
break;
case HERMES_INQ_CHANNELINFO:
{
struct agere_ext_scan_info *bss;
if (!priv->scan_inprogress) {
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) {
union iwreq_data wrqu;
/* Scan is no longer in progress */
priv->scan_inprogress = 0;
wrqu.data.length = 0;
wrqu.data.flags = 0;
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
break;
}
/* Sanity check */
else if (len > sizeof(*bss)) {
printk(KERN_WARNING
"%s: Ext scan results too large (%d bytes). "
"Truncating results to %zd bytes.\n",
dev->name, len, sizeof(*bss));
len = sizeof(*bss);
} 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(sizeof(*bss), GFP_ATOMIC);
if (bss == NULL)
break;
/* Read scan data */
err = hermes_bap_pread(hw, IRQ_BAP, (void *) bss, len,
infofid, sizeof(info));
if (err) {
kfree(bss);
break;
}
orinoco_add_ext_scan_result(priv, bss);
kfree(bss);
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;
}
}
static void __orinoco_ev_infdrop(struct net_device *dev, hermes_t *hw)
{
if (net_ratelimit())
printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
}
/********************************************************************/
/* Internal hardware control routines */
/********************************************************************/
int __orinoco_up(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
struct hermes *hw = &priv->hw;
int err;
netif_carrier_off(dev); /* just to make sure */
err = __orinoco_program_rids(dev);
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;
}
EXPORT_SYMBOL(__orinoco_up);
int __orinoco_down(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
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);
}
/* firmware will have to reassociate */
netif_carrier_off(dev);
priv->last_linkstatus = 0xffff;
return 0;
}
EXPORT_SYMBOL(__orinoco_down);
static int orinoco_allocate_fid(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
struct hermes *hw = &priv->hw;
int err;
err = hermes_allocate(hw, priv->nicbuf_size, &priv->txfid);
if (err == -EIO && priv->nicbuf_size > TX_NICBUF_SIZE_BUG) {
/* Try workaround for old Symbol firmware bug */
priv->nicbuf_size = TX_NICBUF_SIZE_BUG;
err = hermes_allocate(hw, priv->nicbuf_size, &priv->txfid);
printk(KERN_WARNING "%s: firmware ALLOC bug detected "
"(old Symbol firmware?). Work around %s\n",
dev->name, err ? "failed!" : "ok.");
}
return err;
}
int orinoco_reinit_firmware(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
struct hermes *hw = &priv->hw;
int err;
err = hermes_init(hw);
if (priv->do_fw_download && !err) {
err = orinoco_download(priv);
if (err)
priv->do_fw_download = 0;
}
if (!err)
err = orinoco_allocate_fid(dev);
return err;
}
EXPORT_SYMBOL(orinoco_reinit_firmware);
int __orinoco_program_rids(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
hermes_t *hw = &priv->hw;
int err;
struct hermes_idstring idbuf;
/* Set the MAC address */
err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNMACADDR,
HERMES_BYTES_TO_RECLEN(ETH_ALEN), dev->dev_addr);
if (err) {
printk(KERN_ERR "%s: Error %d setting MAC address\n",
dev->name, err);
return err;
}
/* Set up the link mode */
err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFPORTTYPE,
priv->port_type);
if (err) {
printk(KERN_ERR "%s: Error %d setting port type\n",
dev->name, err);
return err;
}
/* Set the channel/frequency */
if (priv->channel != 0 && priv->iw_mode != IW_MODE_INFRA) {
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFOWNCHANNEL,
priv->channel);
if (err) {
printk(KERN_ERR "%s: Error %d setting channel %d\n",
dev->name, err, priv->channel);
return err;
}
}
if (priv->has_ibss) {
u16 createibss;
if ((strlen(priv->desired_essid) == 0) && (priv->createibss)) {
printk(KERN_WARNING "%s: This firmware requires an "
"ESSID in IBSS-Ad-Hoc mode.\n", dev->name);
/* With wvlan_cs, in this case, we would crash.
* hopefully, this driver will behave better...
* Jean II */
createibss = 0;
} else {
createibss = priv->createibss;
}
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFCREATEIBSS,
createibss);
if (err) {
printk(KERN_ERR "%s: Error %d setting CREATEIBSS\n",
dev->name, err);
return err;
}
}
/* Set the desired BSSID */
err = __orinoco_hw_set_wap(priv);
if (err) {
printk(KERN_ERR "%s: Error %d setting AP address\n",
dev->name, err);
return err;
}
/* Set the desired ESSID */
idbuf.len = cpu_to_le16(strlen(priv->desired_essid));
memcpy(&idbuf.val, priv->desired_essid, sizeof(idbuf.val));
/* WinXP wants partner to configure OWNSSID even in IBSS mode. (jimc) */
err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNSSID,
HERMES_BYTES_TO_RECLEN(strlen(priv->desired_essid)+2),
&idbuf);
if (err) {
printk(KERN_ERR "%s: Error %d setting OWNSSID\n",
dev->name, err);
return err;
}
err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFDESIREDSSID,
HERMES_BYTES_TO_RECLEN(strlen(priv->desired_essid)+2),
&idbuf);
if (err) {
printk(KERN_ERR "%s: Error %d setting DESIREDSSID\n",
dev->name, err);
return err;
}
/* Set the station name */
idbuf.len = cpu_to_le16(strlen(priv->nick));
memcpy(&idbuf.val, priv->nick, sizeof(idbuf.val));
err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNNAME,
HERMES_BYTES_TO_RECLEN(strlen(priv->nick)+2),
&idbuf);
if (err) {
printk(KERN_ERR "%s: Error %d setting nickname\n",
dev->name, err);
return err;
}
/* Set AP density */
if (priv->has_sensitivity) {
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFSYSTEMSCALE,
priv->ap_density);
if (err) {
printk(KERN_WARNING "%s: Error %d setting SYSTEMSCALE. "
"Disabling sensitivity control\n",
dev->name, err);
priv->has_sensitivity = 0;
}
}
/* Set RTS threshold */
err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFRTSTHRESHOLD,
priv->rts_thresh);
if (err) {
printk(KERN_ERR "%s: Error %d setting RTS threshold\n",
dev->name, err);
return err;
}
/* Set fragmentation threshold or MWO robustness */
if (priv->has_mwo)
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFMWOROBUST_AGERE,
priv->mwo_robust);
else
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFFRAGMENTATIONTHRESHOLD,
priv->frag_thresh);
if (err) {
printk(KERN_ERR "%s: Error %d setting fragmentation\n",
dev->name, err);
return err;
}
/* Set bitrate */
err = __orinoco_hw_set_bitrate(priv);
if (err) {
printk(KERN_ERR "%s: Error %d setting bitrate\n",
dev->name, err);
return err;
}
/* Set power management */
if (priv->has_pm) {
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFPMENABLED,
priv->pm_on);
if (err) {
printk(KERN_ERR "%s: Error %d setting up PM\n",
dev->name, err);
return err;
}
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFMULTICASTRECEIVE,
priv->pm_mcast);
if (err) {
printk(KERN_ERR "%s: Error %d setting up PM\n",
dev->name, err);
return err;
}
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFMAXSLEEPDURATION,
priv->pm_period);
if (err) {
printk(KERN_ERR "%s: Error %d setting up PM\n",
dev->name, err);
return err;
}
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFPMHOLDOVERDURATION,
priv->pm_timeout);
if (err) {
printk(KERN_ERR "%s: Error %d setting up PM\n",
dev->name, err);
return err;
}
}
/* Set preamble - only for Symbol so far... */
if (priv->has_preamble) {
err = hermes_write_wordrec(hw, USER_BAP,
HERMES_RID_CNFPREAMBLE_SYMBOL,
priv->preamble);
if (err) {
printk(KERN_ERR "%s: Error %d setting preamble\n",
dev->name, err);
return err;
}
}
/* Set up encryption */
if (priv->has_wep || priv->has_wpa) {
err = __orinoco_hw_setup_enc(priv);
if (err) {
printk(KERN_ERR "%s: Error %d activating encryption\n",
dev->name, err);
return err;
}
}
if (priv->iw_mode == IW_MODE_MONITOR) {
/* Enable monitor mode */
dev->type = ARPHRD_IEEE80211;
err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
HERMES_TEST_MONITOR, 0, NULL);
} else {
/* Disable monitor mode */
dev->type = ARPHRD_ETHER;
err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
HERMES_TEST_STOP, 0, NULL);
}
if (err)
return err;
/* Set promiscuity / multicast*/
priv->promiscuous = 0;
priv->mc_count = 0;
[NET]: Add netif_tx_lock Various drivers use xmit_lock internally to synchronise with their transmission routines. They do so without setting xmit_lock_owner. This is fine as long as netpoll is not in use. With netpoll it is possible for deadlocks to occur if xmit_lock_owner isn't set. This is because if a printk occurs while xmit_lock is held and xmit_lock_owner is not set can cause netpoll to attempt to take xmit_lock recursively. While it is possible to resolve this by getting netpoll to use trylock, it is suboptimal because netpoll's sole objective is to maximise the chance of getting the printk out on the wire. So delaying or dropping the message is to be avoided as much as possible. So the only alternative is to always set xmit_lock_owner. The following patch does this by introducing the netif_tx_lock family of functions that take care of setting/unsetting xmit_lock_owner. I renamed xmit_lock to _xmit_lock to indicate that it should not be used directly. I didn't provide irq versions of the netif_tx_lock functions since xmit_lock is meant to be a BH-disabling lock. This is pretty much a straight text substitution except for a small bug fix in winbond. It currently uses netif_stop_queue/spin_unlock_wait to stop transmission. This is unsafe as an IRQ can potentially wake up the queue. So it is safer to use netif_tx_disable. The hamradio bits used spin_lock_irq but it is unnecessary as xmit_lock must never be taken in an IRQ handler. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-10 03:20:56 +08:00
/* FIXME: what about netif_tx_lock */
__orinoco_set_multicast_list(dev);
return 0;
}
/* FIXME: return int? */
static void
__orinoco_set_multicast_list(struct net_device *dev)
{
struct orinoco_private *priv = netdev_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) ||
(dev->mc_count > MAX_MULTICAST(priv))) {
promisc = 1;
mc_count = 0;
} else {
promisc = 0;
mc_count = dev->mc_count;
}
err = __orinoco_hw_set_multicast_list(priv, dev->mc_list, mc_count,
promisc);
}
/* 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: Cleanup of driver struct */
orinoco_clear_scan_results(priv, 0);
priv->scan_inprogress = 0;
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(dev);
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 */
spin_lock_irq(&priv->lock);
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(dev);
if (err) {
printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
dev->name, err);
} else
dev->trans_start = jiffies;
}
spin_unlock_irq(&priv->lock);
return;
disable:
hermes_set_irqmask(hw, 0);
netif_device_detach(dev);
printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
}
/********************************************************************/
/* Interrupt handler */
/********************************************************************/
static void __orinoco_ev_tick(struct net_device *dev, hermes_t *hw)
{
printk(KERN_DEBUG "%s: TICK\n", dev->name);
}
static void __orinoco_ev_wterr(struct net_device *dev, hermes_t *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);
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
irqreturn_t orinoco_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct orinoco_private *priv = netdev_priv(dev);
hermes_t *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 */
/********************************************************************/
struct comp_id {
u16 id, variant, major, minor;
} __attribute__ ((packed));
static inline fwtype_t determine_firmware_type(struct comp_id *nic_id)
{
if (nic_id->id < 0x8000)
return FIRMWARE_TYPE_AGERE;
else if (nic_id->id == 0x8000 && nic_id->major == 0)
return FIRMWARE_TYPE_SYMBOL;
else
return FIRMWARE_TYPE_INTERSIL;
}
/* Set priv->firmware type, determine firmware properties */
static int determine_firmware(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
hermes_t *hw = &priv->hw;
int err;
struct comp_id nic_id, sta_id;
unsigned int firmver;
char tmp[SYMBOL_MAX_VER_LEN+1] __attribute__((aligned(2)));
/* Get the hardware version */
err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_NICID, &nic_id);
if (err) {
printk(KERN_ERR "%s: Cannot read hardware identity: error %d\n",
dev->name, err);
return err;
}
le16_to_cpus(&nic_id.id);
le16_to_cpus(&nic_id.variant);
le16_to_cpus(&nic_id.major);
le16_to_cpus(&nic_id.minor);
printk(KERN_DEBUG "%s: Hardware identity %04x:%04x:%04x:%04x\n",
dev->name, nic_id.id, nic_id.variant,
nic_id.major, nic_id.minor);
priv->firmware_type = determine_firmware_type(&nic_id);
/* Get the firmware version */
err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_STAID, &sta_id);
if (err) {
printk(KERN_ERR "%s: Cannot read station identity: error %d\n",
dev->name, err);
return err;
}
le16_to_cpus(&sta_id.id);
le16_to_cpus(&sta_id.variant);
le16_to_cpus(&sta_id.major);
le16_to_cpus(&sta_id.minor);
printk(KERN_DEBUG "%s: Station identity %04x:%04x:%04x:%04x\n",
dev->name, sta_id.id, sta_id.variant,
sta_id.major, sta_id.minor);
switch (sta_id.id) {
case 0x15:
printk(KERN_ERR "%s: Primary firmware is active\n",
dev->name);
return -ENODEV;
case 0x14b:
printk(KERN_ERR "%s: Tertiary firmware is active\n",
dev->name);
return -ENODEV;
case 0x1f: /* Intersil, Agere, Symbol Spectrum24 */
case 0x21: /* Symbol Spectrum24 Trilogy */
break;
default:
printk(KERN_NOTICE "%s: Unknown station ID, please report\n",
dev->name);
break;
}
/* Default capabilities */
priv->has_sensitivity = 1;
priv->has_mwo = 0;
priv->has_preamble = 0;
priv->has_port3 = 1;
priv->has_ibss = 1;
priv->has_wep = 0;
priv->has_big_wep = 0;
priv->has_alt_txcntl = 0;
priv->has_ext_scan = 0;
priv->has_wpa = 0;
priv->do_fw_download = 0;
/* Determine capabilities from the firmware version */
switch (priv->firmware_type) {
case FIRMWARE_TYPE_AGERE:
/* Lucent Wavelan IEEE, Lucent Orinoco, Cabletron RoamAbout,
ELSA, Melco, HP, IBM, Dell 1150, Compaq 110/210 */
snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
"Lucent/Agere %d.%02d", sta_id.major, sta_id.minor);
firmver = ((unsigned long)sta_id.major << 16) | sta_id.minor;
priv->has_ibss = (firmver >= 0x60006);
priv->has_wep = (firmver >= 0x40020);
priv->has_big_wep = 1; /* FIXME: this is wrong - how do we tell
Gold cards from the others? */
priv->has_mwo = (firmver >= 0x60000);
priv->has_pm = (firmver >= 0x40020); /* Don't work in 7.52 ? */
priv->ibss_port = 1;
priv->has_hostscan = (firmver >= 0x8000a);
priv->do_fw_download = 1;
priv->broken_monitor = (firmver >= 0x80000);
priv->has_alt_txcntl = (firmver >= 0x90000); /* All 9.x ? */
priv->has_ext_scan = (firmver >= 0x90000); /* All 9.x ? */
priv->has_wpa = (firmver >= 0x9002a);
/* Tested with Agere firmware :
* 1.16 ; 4.08 ; 4.52 ; 6.04 ; 6.16 ; 7.28 => Jean II
* Tested CableTron firmware : 4.32 => Anton */
break;
case FIRMWARE_TYPE_SYMBOL:
/* Symbol , 3Com AirConnect, Intel, Ericsson WLAN */
/* Intel MAC : 00:02:B3:* */
/* 3Com MAC : 00:50:DA:* */
memset(tmp, 0, sizeof(tmp));
/* Get the Symbol firmware version */
err = hermes_read_ltv(hw, USER_BAP,
HERMES_RID_SECONDARYVERSION_SYMBOL,
SYMBOL_MAX_VER_LEN, NULL, &tmp);
if (err) {
printk(KERN_WARNING
"%s: Error %d reading Symbol firmware info. "
"Wildly guessing capabilities...\n",
dev->name, err);
firmver = 0;
tmp[0] = '\0';
} else {
/* The firmware revision is a string, the format is
* something like : "V2.20-01".
* Quick and dirty parsing... - Jean II
*/
firmver = ((tmp[1] - '0') << 16)
| ((tmp[3] - '0') << 12)
| ((tmp[4] - '0') << 8)
| ((tmp[6] - '0') << 4)
| (tmp[7] - '0');
tmp[SYMBOL_MAX_VER_LEN] = '\0';
}
snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
"Symbol %s", tmp);
priv->has_ibss = (firmver >= 0x20000);
priv->has_wep = (firmver >= 0x15012);
priv->has_big_wep = (firmver >= 0x20000);
priv->has_pm = (firmver >= 0x20000 && firmver < 0x22000) ||
(firmver >= 0x29000 && firmver < 0x30000) ||
firmver >= 0x31000;
priv->has_preamble = (firmver >= 0x20000);
priv->ibss_port = 4;
/* Symbol firmware is found on various cards, but
* there has been no attempt to check firmware
* download on non-spectrum_cs based cards.
*
* Given that the Agere firmware download works
* differently, we should avoid doing a firmware
* download with the Symbol algorithm on non-spectrum
* cards.
*
* For now we can identify a spectrum_cs based card
* because it has a firmware reset function.
*/
priv->do_fw_download = (priv->stop_fw != NULL);
priv->broken_disableport = (firmver == 0x25013) ||
(firmver >= 0x30000 && firmver <= 0x31000);
priv->has_hostscan = (firmver >= 0x31001) ||
(firmver >= 0x29057 && firmver < 0x30000);
/* Tested with Intel firmware : 0x20015 => Jean II */
/* Tested with 3Com firmware : 0x15012 & 0x22001 => Jean II */
break;
case FIRMWARE_TYPE_INTERSIL:
/* D-Link, Linksys, Adtron, ZoomAir, and many others...
* Samsung, Compaq 100/200 and Proxim are slightly
* different and less well tested */
/* D-Link MAC : 00:40:05:* */
/* Addtron MAC : 00:90:D1:* */
snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
"Intersil %d.%d.%d", sta_id.major, sta_id.minor,
sta_id.variant);
firmver = ((unsigned long)sta_id.major << 16) |
((unsigned long)sta_id.minor << 8) | sta_id.variant;
priv->has_ibss = (firmver >= 0x000700); /* FIXME */
priv->has_big_wep = priv->has_wep = (firmver >= 0x000800);
priv->has_pm = (firmver >= 0x000700);
priv->has_hostscan = (firmver >= 0x010301);
if (firmver >= 0x000800)
priv->ibss_port = 0;
else {
printk(KERN_NOTICE "%s: Intersil firmware earlier "
"than v0.8.x - several features not supported\n",
dev->name);
priv->ibss_port = 1;
}
break;
}
printk(KERN_DEBUG "%s: Firmware determined as %s\n", dev->name,
priv->fw_name);
return 0;
}
static int orinoco_init(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
hermes_t *hw = &priv->hw;
int err = 0;
struct hermes_idstring nickbuf;
u16 reclen;
int len;
/* 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 = hermes_init(hw);
if (err != 0) {
printk(KERN_ERR "%s: failed to initialize firmware (err = %d)\n",
dev->name, err);
goto out;
}
err = determine_firmware(dev);
if (err != 0) {
printk(KERN_ERR "%s: Incompatible firmware, aborting\n",
dev->name);
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_firmware(dev);
if (err != 0) {
printk(KERN_ERR "%s: Incompatible firmware, aborting\n",
dev->name);
goto out;
}
}
if (priv->has_port3)
printk(KERN_DEBUG "%s: Ad-hoc demo mode supported\n",
dev->name);
if (priv->has_ibss)
printk(KERN_DEBUG "%s: IEEE standard IBSS ad-hoc mode supported\n",
dev->name);
if (priv->has_wep) {
printk(KERN_DEBUG "%s: WEP supported, %s-bit key\n", dev->name,
priv->has_big_wep ? "104" : "40");
}
if (priv->has_wpa) {
printk(KERN_DEBUG "%s: WPA-PSK supported\n", dev->name);
if (orinoco_mic_init(priv)) {
printk(KERN_ERR "%s: Failed to setup MIC crypto "
"algorithm. Disabling WPA support\n", dev->name);
priv->has_wpa = 0;
}
}
/* Now we have the firmware capabilities, allocate appropiate
* sized scan buffers */
if (orinoco_bss_data_allocate(priv))
goto out;
orinoco_bss_data_init(priv);
/* Get the MAC address */
err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CNFOWNMACADDR,
ETH_ALEN, NULL, dev->dev_addr);
if (err) {
printk(KERN_WARNING "%s: failed to read MAC address!\n",
dev->name);
goto out;
}
printk(KERN_DEBUG "%s: MAC address %pM\n",
dev->name, dev->dev_addr);
/* Get the station name */
err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CNFOWNNAME,
sizeof(nickbuf), &reclen, &nickbuf);
if (err) {
printk(KERN_ERR "%s: failed to read station name\n",
dev->name);
goto out;
}
if (nickbuf.len)
len = min(IW_ESSID_MAX_SIZE, (int)le16_to_cpu(nickbuf.len));
else
len = min(IW_ESSID_MAX_SIZE, 2 * reclen);
memcpy(priv->nick, &nickbuf.val, len);
priv->nick[len] = '\0';
printk(KERN_DEBUG "%s: Station name \"%s\"\n", dev->name, priv->nick);
err = orinoco_allocate_fid(dev);
if (err) {
printk(KERN_ERR "%s: failed to allocate NIC buffer!\n",
dev->name);
goto out;
}
/* Get allowed channels */
err = hermes_read_wordrec(hw, USER_BAP, HERMES_RID_CHANNELLIST,
&priv->channel_mask);
if (err) {
printk(KERN_ERR "%s: failed to read channel list!\n",
dev->name);
goto out;
}
/* Get initial AP density */
err = hermes_read_wordrec(hw, USER_BAP, HERMES_RID_CNFSYSTEMSCALE,
&priv->ap_density);
if (err || priv->ap_density < 1 || priv->ap_density > 3)
priv->has_sensitivity = 0;
/* Get initial RTS threshold */
err = hermes_read_wordrec(hw, USER_BAP, HERMES_RID_CNFRTSTHRESHOLD,
&priv->rts_thresh);
if (err) {
printk(KERN_ERR "%s: failed to read RTS threshold!\n",
dev->name);
goto out;
}
/* Get initial fragmentation settings */
if (priv->has_mwo)
err = hermes_read_wordrec(hw, USER_BAP,
HERMES_RID_CNFMWOROBUST_AGERE,
&priv->mwo_robust);
else
err = hermes_read_wordrec(hw, USER_BAP,
HERMES_RID_CNFFRAGMENTATIONTHRESHOLD,
&priv->frag_thresh);
if (err) {
printk(KERN_ERR "%s: failed to read fragmentation settings!\n",
dev->name);
goto out;
}
/* Power management setup */
if (priv->has_pm) {
priv->pm_on = 0;
priv->pm_mcast = 1;
err = hermes_read_wordrec(hw, USER_BAP,
HERMES_RID_CNFMAXSLEEPDURATION,
&priv->pm_period);
if (err) {
printk(KERN_ERR "%s: failed to read power management period!\n",
dev->name);
goto out;
}
err = hermes_read_wordrec(hw, USER_BAP,
HERMES_RID_CNFPMHOLDOVERDURATION,
&priv->pm_timeout);
if (err) {
printk(KERN_ERR "%s: failed to read power management timeout!\n",
dev->name);
goto out;
}
}
/* Preamble setup */
if (priv->has_preamble) {
err = hermes_read_wordrec(hw, USER_BAP,
HERMES_RID_CNFPREAMBLE_SYMBOL,
&priv->preamble);
if (err)
goto out;
}
/* Set up the default configuration */
priv->iw_mode = IW_MODE_INFRA;
/* 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 = IW_ENCODE_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;
/* Make the hardware available, as long as it hasn't been
* removed elsewhere (e.g. by PCMCIA hot unplug) */
spin_lock_irq(&priv->lock);
priv->hw_unavailable--;
spin_unlock_irq(&priv->lock);
printk(KERN_DEBUG "%s: ready\n", dev->name);
out:
return err;
}
static const struct net_device_ops orinoco_netdev_ops = {
.ndo_init = orinoco_init,
.ndo_open = orinoco_open,
.ndo_stop = orinoco_stop,
.ndo_start_xmit = orinoco_xmit,
.ndo_set_multicast_list = orinoco_set_multicast_list,
.ndo_change_mtu = orinoco_change_mtu,
.ndo_tx_timeout = orinoco_tx_timeout,
.ndo_get_stats = orinoco_get_stats,
};
struct net_device
*alloc_orinocodev(int sizeof_card,
struct device *device,
int (*hard_reset)(struct orinoco_private *),
int (*stop_fw)(struct orinoco_private *, int))
{
struct net_device *dev;
struct orinoco_private *priv;
dev = alloc_etherdev(sizeof(struct orinoco_private) + sizeof_card);
if (!dev)
return NULL;
priv = netdev_priv(dev);
priv->ndev = dev;
if (sizeof_card)
priv->card = (void *)((unsigned long)priv
+ sizeof(struct orinoco_private));
else
priv->card = NULL;
priv->dev = device;
/* Setup / override net_device fields */
dev->netdev_ops = &orinoco_netdev_ops;
dev->watchdog_timeo = HZ; /* 1 second timeout */
dev->ethtool_ops = &orinoco_ethtool_ops;
dev->wireless_handlers = &orinoco_handler_def;
#ifdef WIRELESS_SPY
priv->wireless_data.spy_data = &priv->spy_data;
dev->wireless_data = &priv->wireless_data;
#endif
/* we use the default eth_mac_addr for setting the MAC addr */
/* Reserve space in skb for the SNAP header */
dev->hard_header_len += ENCAPS_OVERHEAD;
/* 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) dev);
netif_carrier_off(dev);
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 dev;
}
EXPORT_SYMBOL(alloc_orinocodev);
void free_orinocodev(struct net_device *dev)
{
struct orinoco_private *priv = netdev_priv(dev);
orinoco: take the driver lock in the rx tasklet Fix the warning reproduced below. We add to rx_list in interrupt context and remove elements in tasklet context. While removing elements we need to prevent the interrupt modifying the list. Note that "orinoco: Process bulk of receive interrupt in a tasklet" did not preserve locking semantics on what is now orinoco_rx. This patch reinstates the locking semantics and ensures it covers rx_list as well. This leads to additional cleanup required in free_orinocodev. [89479.105038] WARNING: at lib/list_debug.c:30 __list_add+0x8f/0xa0() [89479.105058] list_add corruption. prev->next should be next (dddb3568), but was cbc28978. (prev=dddb3568). [89479.106002] Pid: 15746, comm: X Not tainted 2.6.28-1avb #26 [89479.106020] Call Trace: [89479.106062] [<c011d3b0>] warn_slowpath+0x60/0x80 [89479.106104] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106194] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106218] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106254] [<c02f9c9d>] ? _spin_unlock+0x1d/0x20 [89479.106270] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106302] [<c01ff2a7>] ? delay_tsc+0x17/0x24 [89479.106319] [<c01ff221>] ? __const_udelay+0x21/0x30 [89479.106376] [<dfa8b1e2>] ? hermes_bap_seek+0x112/0x1e0 [hermes] [89479.106396] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106418] [<c018e307>] ? __kmalloc_track_caller+0xb7/0x110 [89479.106448] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106465] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106482] [<c020e13f>] __list_add+0x8f/0xa0 [89479.106551] [<dfd0fcae>] orinoco_interrupt+0xcae/0x16c0 [orinoco] [89479.106574] [<c013b0e3>] ? tick_dev_program_event+0x33/0xb0 [89479.106594] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106613] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106662] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106892] [<dfe7faa7>] ? usb_hcd_irq+0x97/0xa0 [usbcore] [89479.106926] [<c015ba79>] handle_IRQ_event+0x29/0x60 [89479.106947] [<c015cf89>] handle_level_irq+0x69/0xe0 [89479.106963] [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.106977] <IRQ> [<c02ca933>] ? tcp_v4_rcv+0x633/0x6e0 [89479.107025] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107057] [<c02a0000>] ? sk_run_filter+0x320/0x7a0 [89479.107078] [<c020e041>] ? list_del+0x21/0x90 [89479.107106] [<dfd0d24e>] ? orinoco_rx_isr_tasklet+0x2ce/0x480 [orinoco] [89479.107131] [<c01402e0>] ? __lock_acquire+0x160/0x1650 [89479.107151] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.107169] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.107200] [<c012249a>] ? irq_enter+0xa/0x60 [89479.107217] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107518] [<c010342c>] ? restore_nocheck_notrace+0x0/0xe [89479.107542] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107561] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107583] [<c01ff678>] ? trace_hardirqs_on_thunk+0xc/0x10 [89479.107602] [<c0122087>] ? tasklet_action+0x27/0x90 [89479.107620] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107638] [<c01220a3>] ? tasklet_action+0x43/0x90 [89479.107655] [<c012289f>] ? __do_softirq+0x6f/0x110 [89479.107674] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107685] <IRQ> [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.107715] [<c012246d>] ? irq_exit+0x5d/0x80 [89479.107732] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107747] [<c0103337>] ? sysenter_exit+0xf/0x16 [89479.107765] [<c013f83d>] ? trace_hardirqs_on_caller+0xfd/0x140 [89479.107782] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107797] ---[ end trace a1fc0a52df4a729d ]--- Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-07 08:23:55 +08:00
struct orinoco_rx_data *rx_data, *temp;
orinoco: take the driver lock in the rx tasklet Fix the warning reproduced below. We add to rx_list in interrupt context and remove elements in tasklet context. While removing elements we need to prevent the interrupt modifying the list. Note that "orinoco: Process bulk of receive interrupt in a tasklet" did not preserve locking semantics on what is now orinoco_rx. This patch reinstates the locking semantics and ensures it covers rx_list as well. This leads to additional cleanup required in free_orinocodev. [89479.105038] WARNING: at lib/list_debug.c:30 __list_add+0x8f/0xa0() [89479.105058] list_add corruption. prev->next should be next (dddb3568), but was cbc28978. (prev=dddb3568). [89479.106002] Pid: 15746, comm: X Not tainted 2.6.28-1avb #26 [89479.106020] Call Trace: [89479.106062] [<c011d3b0>] warn_slowpath+0x60/0x80 [89479.106104] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106194] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106218] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106254] [<c02f9c9d>] ? _spin_unlock+0x1d/0x20 [89479.106270] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106302] [<c01ff2a7>] ? delay_tsc+0x17/0x24 [89479.106319] [<c01ff221>] ? __const_udelay+0x21/0x30 [89479.106376] [<dfa8b1e2>] ? hermes_bap_seek+0x112/0x1e0 [hermes] [89479.106396] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106418] [<c018e307>] ? __kmalloc_track_caller+0xb7/0x110 [89479.106448] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106465] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106482] [<c020e13f>] __list_add+0x8f/0xa0 [89479.106551] [<dfd0fcae>] orinoco_interrupt+0xcae/0x16c0 [orinoco] [89479.106574] [<c013b0e3>] ? tick_dev_program_event+0x33/0xb0 [89479.106594] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106613] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106662] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106892] [<dfe7faa7>] ? usb_hcd_irq+0x97/0xa0 [usbcore] [89479.106926] [<c015ba79>] handle_IRQ_event+0x29/0x60 [89479.106947] [<c015cf89>] handle_level_irq+0x69/0xe0 [89479.106963] [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.106977] <IRQ> [<c02ca933>] ? tcp_v4_rcv+0x633/0x6e0 [89479.107025] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107057] [<c02a0000>] ? sk_run_filter+0x320/0x7a0 [89479.107078] [<c020e041>] ? list_del+0x21/0x90 [89479.107106] [<dfd0d24e>] ? orinoco_rx_isr_tasklet+0x2ce/0x480 [orinoco] [89479.107131] [<c01402e0>] ? __lock_acquire+0x160/0x1650 [89479.107151] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.107169] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.107200] [<c012249a>] ? irq_enter+0xa/0x60 [89479.107217] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107518] [<c010342c>] ? restore_nocheck_notrace+0x0/0xe [89479.107542] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107561] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107583] [<c01ff678>] ? trace_hardirqs_on_thunk+0xc/0x10 [89479.107602] [<c0122087>] ? tasklet_action+0x27/0x90 [89479.107620] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107638] [<c01220a3>] ? tasklet_action+0x43/0x90 [89479.107655] [<c012289f>] ? __do_softirq+0x6f/0x110 [89479.107674] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107685] <IRQ> [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.107715] [<c012246d>] ? irq_exit+0x5d/0x80 [89479.107732] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107747] [<c0103337>] ? sysenter_exit+0xf/0x16 [89479.107765] [<c013f83d>] ? trace_hardirqs_on_caller+0xfd/0x140 [89479.107782] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107797] ---[ end trace a1fc0a52df4a729d ]--- Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-07 08:23:55 +08:00
/* 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);
orinoco: take the driver lock in the rx tasklet Fix the warning reproduced below. We add to rx_list in interrupt context and remove elements in tasklet context. While removing elements we need to prevent the interrupt modifying the list. Note that "orinoco: Process bulk of receive interrupt in a tasklet" did not preserve locking semantics on what is now orinoco_rx. This patch reinstates the locking semantics and ensures it covers rx_list as well. This leads to additional cleanup required in free_orinocodev. [89479.105038] WARNING: at lib/list_debug.c:30 __list_add+0x8f/0xa0() [89479.105058] list_add corruption. prev->next should be next (dddb3568), but was cbc28978. (prev=dddb3568). [89479.106002] Pid: 15746, comm: X Not tainted 2.6.28-1avb #26 [89479.106020] Call Trace: [89479.106062] [<c011d3b0>] warn_slowpath+0x60/0x80 [89479.106104] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106194] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106218] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106254] [<c02f9c9d>] ? _spin_unlock+0x1d/0x20 [89479.106270] [<c018d9f0>] ? __slab_alloc+0x550/0x560 [89479.106302] [<c01ff2a7>] ? delay_tsc+0x17/0x24 [89479.106319] [<c01ff221>] ? __const_udelay+0x21/0x30 [89479.106376] [<dfa8b1e2>] ? hermes_bap_seek+0x112/0x1e0 [hermes] [89479.106396] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106418] [<c018e307>] ? __kmalloc_track_caller+0xb7/0x110 [89479.106448] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106465] [<c028eefc>] ? dev_alloc_skb+0x1c/0x30 [89479.106482] [<c020e13f>] __list_add+0x8f/0xa0 [89479.106551] [<dfd0fcae>] orinoco_interrupt+0xcae/0x16c0 [orinoco] [89479.106574] [<c013b0e3>] ? tick_dev_program_event+0x33/0xb0 [89479.106594] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.106613] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.106662] [<c013d7eb>] ? trace_hardirqs_off+0xb/0x10 [89479.106892] [<dfe7faa7>] ? usb_hcd_irq+0x97/0xa0 [usbcore] [89479.106926] [<c015ba79>] handle_IRQ_event+0x29/0x60 [89479.106947] [<c015cf89>] handle_level_irq+0x69/0xe0 [89479.106963] [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.106977] <IRQ> [<c02ca933>] ? tcp_v4_rcv+0x633/0x6e0 [89479.107025] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107057] [<c02a0000>] ? sk_run_filter+0x320/0x7a0 [89479.107078] [<c020e041>] ? list_del+0x21/0x90 [89479.107106] [<dfd0d24e>] ? orinoco_rx_isr_tasklet+0x2ce/0x480 [orinoco] [89479.107131] [<c01402e0>] ? __lock_acquire+0x160/0x1650 [89479.107151] [<c01073d0>] ? native_sched_clock+0x20/0x70 [89479.107169] [<c013d825>] ? lock_release_holdtime+0x35/0x200 [89479.107200] [<c012249a>] ? irq_enter+0xa/0x60 [89479.107217] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107518] [<c010342c>] ? restore_nocheck_notrace+0x0/0xe [89479.107542] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107561] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107583] [<c01ff678>] ? trace_hardirqs_on_thunk+0xc/0x10 [89479.107602] [<c0122087>] ? tasklet_action+0x27/0x90 [89479.107620] [<c013f7b4>] ? trace_hardirqs_on_caller+0x74/0x140 [89479.107638] [<c01220a3>] ? tasklet_action+0x43/0x90 [89479.107655] [<c012289f>] ? __do_softirq+0x6f/0x110 [89479.107674] [<c0122830>] ? __do_softirq+0x0/0x110 [89479.107685] <IRQ> [<c015cf20>] ? handle_level_irq+0x0/0xe0 [89479.107715] [<c012246d>] ? irq_exit+0x5d/0x80 [89479.107732] [<c0104e52>] ? do_IRQ+0xd2/0x130 [89479.107747] [<c0103337>] ? sysenter_exit+0xf/0x16 [89479.107765] [<c013f83d>] ? trace_hardirqs_on_caller+0xfd/0x140 [89479.107782] [<c0103f0c>] ? common_interrupt+0x28/0x30 [89479.107797] ---[ end trace a1fc0a52df4a729d ]--- Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-07 08:23:55 +08:00
/* 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);
}
orinoco_unregister_pm_notifier(priv);
orinoco_uncache_fw(priv);
priv->wpa_ie_len = 0;
kfree(priv->wpa_ie);
orinoco_mic_free(priv);
orinoco_bss_data_free(priv);
free_netdev(dev);
}
EXPORT_SYMBOL(free_orinocodev);
static void orinoco_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
struct orinoco_private *priv = netdev_priv(dev);
strncpy(info->driver, DRIVER_NAME, sizeof(info->driver) - 1);
strncpy(info->version, DRIVER_VERSION, sizeof(info->version) - 1);
strncpy(info->fw_version, priv->fw_name, sizeof(info->fw_version) - 1);
if (dev->dev.parent)
strncpy(info->bus_info, dev_name(dev->dev.parent),
sizeof(info->bus_info) - 1);
else
snprintf(info->bus_info, sizeof(info->bus_info) - 1,
"PCMCIA %p", priv->hw.iobase);
}
static const struct ethtool_ops orinoco_ethtool_ops = {
.get_drvinfo = orinoco_get_drvinfo,
.get_link = ethtool_op_get_link,
};
/********************************************************************/
/* 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);