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kernel-fxtec-pro1x/drivers/net/wireless/hostap/hostap_hw.c
David Howells 7d12e780e0 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 15:10:12 +01:00

3458 lines
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/*
* Host AP (software wireless LAN access point) driver for
* Intersil Prism2/2.5/3.
*
* Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
* <jkmaline@cc.hut.fi>
* Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. See README and COPYING for
* more details.
*
* FIX:
* - there is currently no way of associating TX packets to correct wds device
* when TX Exc/OK event occurs, so all tx_packets and some
* tx_errors/tx_dropped are added to the main netdevice; using sw_support
* field in txdesc might be used to fix this (using Alloc event to increment
* tx_packets would need some further info in txfid table)
*
* Buffer Access Path (BAP) usage:
* Prism2 cards have two separate BAPs for accessing the card memory. These
* should allow concurrent access to two different frames and the driver
* previously used BAP0 for sending data and BAP1 for receiving data.
* However, there seems to be number of issues with concurrent access and at
* least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
* Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
* host and card memories. BAP0 accesses are protected with local->baplock
* (spin_lock_bh) to prevent concurrent use.
*/
#include <asm/delay.h>
#include <asm/uaccess.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/proc_fs.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
#include <linux/random.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/rtnetlink.h>
#include <linux/wireless.h>
#include <net/iw_handler.h>
#include <net/ieee80211.h>
#include <net/ieee80211_crypt.h>
#include <asm/irq.h>
#include "hostap_80211.h"
#include "hostap.h"
#include "hostap_ap.h"
/* #define final_version */
static int mtu = 1500;
module_param(mtu, int, 0444);
MODULE_PARM_DESC(mtu, "Maximum transfer unit");
static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
module_param_array(channel, int, NULL, 0444);
MODULE_PARM_DESC(channel, "Initial channel");
static char essid[33] = "test";
module_param_string(essid, essid, sizeof(essid), 0444);
MODULE_PARM_DESC(essid, "Host AP's ESSID");
static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
module_param_array(iw_mode, int, NULL, 0444);
MODULE_PARM_DESC(iw_mode, "Initial operation mode");
static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
module_param_array(beacon_int, int, NULL, 0444);
MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
module_param_array(dtim_period, int, NULL, 0444);
MODULE_PARM_DESC(dtim_period, "DTIM period");
static char dev_template[16] = "wlan%d";
module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
"wlan%d)");
#ifdef final_version
#define EXTRA_EVENTS_WTERR 0
#else
/* check WTERR events (Wait Time-out) in development versions */
#define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
#endif
/* Events that will be using BAP0 */
#define HFA384X_BAP0_EVENTS \
(HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
/* event mask, i.e., events that will result in an interrupt */
#define HFA384X_EVENT_MASK \
(HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
HFA384X_EV_CMD | HFA384X_EV_TICK | \
EXTRA_EVENTS_WTERR)
/* Default TX control flags: use 802.11 headers and request interrupt for
* failed transmits. Frames that request ACK callback, will add
* _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
*/
#define HFA384X_TX_CTRL_FLAGS \
(HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
/* ca. 1 usec */
#define HFA384X_CMD_BUSY_TIMEOUT 5000
#define HFA384X_BAP_BUSY_TIMEOUT 50000
/* ca. 10 usec */
#define HFA384X_CMD_COMPL_TIMEOUT 20000
#define HFA384X_DL_COMPL_TIMEOUT 1000000
/* Wait times for initialization; yield to other processes to avoid busy
* waiting for long time. */
#define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
#define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
static void prism2_hw_reset(struct net_device *dev);
static void prism2_check_sta_fw_version(local_info_t *local);
#ifdef PRISM2_DOWNLOAD_SUPPORT
/* hostap_download.c */
static int prism2_download_aux_dump(struct net_device *dev,
unsigned int addr, int len, u8 *buf);
static u8 * prism2_read_pda(struct net_device *dev);
static int prism2_download(local_info_t *local,
struct prism2_download_param *param);
static void prism2_download_free_data(struct prism2_download_data *dl);
static int prism2_download_volatile(local_info_t *local,
struct prism2_download_data *param);
static int prism2_download_genesis(local_info_t *local,
struct prism2_download_data *param);
static int prism2_get_ram_size(local_info_t *local);
#endif /* PRISM2_DOWNLOAD_SUPPORT */
#ifndef final_version
/* magic value written to SWSUPPORT0 reg. for detecting whether card is still
* present */
#define HFA384X_MAGIC 0x8A32
#endif
static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
{
return HFA384X_INW(reg);
}
static void hfa384x_read_regs(struct net_device *dev,
struct hfa384x_regs *regs)
{
regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
}
/**
* __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
* @local: pointer to private Host AP driver data
* @entry: Prism2 command queue entry to be freed
* @del_req: request the entry to be removed
*
* Internal helper function for freeing Prism2 command queue entries.
* Caller must have acquired local->cmdlock before calling this function.
*/
static inline void __hostap_cmd_queue_free(local_info_t *local,
struct hostap_cmd_queue *entry,
int del_req)
{
if (del_req) {
entry->del_req = 1;
if (!list_empty(&entry->list)) {
list_del_init(&entry->list);
local->cmd_queue_len--;
}
}
if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
kfree(entry);
}
/**
* hostap_cmd_queue_free - Free Prism2 command queue entry
* @local: pointer to private Host AP driver data
* @entry: Prism2 command queue entry to be freed
* @del_req: request the entry to be removed
*
* Free a Prism2 command queue entry.
*/
static inline void hostap_cmd_queue_free(local_info_t *local,
struct hostap_cmd_queue *entry,
int del_req)
{
unsigned long flags;
spin_lock_irqsave(&local->cmdlock, flags);
__hostap_cmd_queue_free(local, entry, del_req);
spin_unlock_irqrestore(&local->cmdlock, flags);
}
/**
* prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
* @local: pointer to private Host AP driver data
*/
static void prism2_clear_cmd_queue(local_info_t *local)
{
struct list_head *ptr, *n;
unsigned long flags;
struct hostap_cmd_queue *entry;
spin_lock_irqsave(&local->cmdlock, flags);
list_for_each_safe(ptr, n, &local->cmd_queue) {
entry = list_entry(ptr, struct hostap_cmd_queue, list);
atomic_inc(&entry->usecnt);
printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
"(type=%d, cmd=0x%04x, param0=0x%04x)\n",
local->dev->name, entry->type, entry->cmd,
entry->param0);
__hostap_cmd_queue_free(local, entry, 1);
}
if (local->cmd_queue_len) {
/* This should not happen; print debug message and clear
* queue length. */
printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
"flush\n", local->dev->name, local->cmd_queue_len);
local->cmd_queue_len = 0;
}
spin_unlock_irqrestore(&local->cmdlock, flags);
}
/**
* hfa384x_cmd_issue - Issue a Prism2 command to the hardware
* @dev: pointer to net_device
* @entry: Prism2 command queue entry to be issued
*/
static int hfa384x_cmd_issue(struct net_device *dev,
struct hostap_cmd_queue *entry)
{
struct hostap_interface *iface;
local_info_t *local;
int tries;
u16 reg;
unsigned long flags;
iface = netdev_priv(dev);
local = iface->local;
if (local->func->card_present && !local->func->card_present(local))
return -ENODEV;
if (entry->issued) {
printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
dev->name, entry);
}
/* wait until busy bit is clear; this should always be clear since the
* commands are serialized */
tries = HFA384X_CMD_BUSY_TIMEOUT;
while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
tries--;
udelay(1);
}
#ifndef final_version
if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
prism2_io_debug_error(dev, 1);
printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
"for %d usec\n", dev->name,
HFA384X_CMD_BUSY_TIMEOUT - tries);
}
#endif
if (tries == 0) {
reg = HFA384X_INW(HFA384X_CMD_OFF);
prism2_io_debug_error(dev, 2);
printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
"reg=0x%04x\n", dev->name, reg);
return -ETIMEDOUT;
}
/* write command */
spin_lock_irqsave(&local->cmdlock, flags);
HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
entry->issued = 1;
spin_unlock_irqrestore(&local->cmdlock, flags);
return 0;
}
/**
* hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
* @dev: pointer to net_device
* @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
* @param0: value for Param0 register
* @param1: value for Param1 register (pointer; %NULL if not used)
* @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
*
* Issue given command (possibly after waiting in command queue) and sleep
* until the command is completed (or timed out or interrupted). This can be
* called only from user process context.
*/
static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
u16 *param1, u16 *resp0)
{
struct hostap_interface *iface;
local_info_t *local;
int err, res, issue, issued = 0;
unsigned long flags;
struct hostap_cmd_queue *entry;
DECLARE_WAITQUEUE(wait, current);
iface = netdev_priv(dev);
local = iface->local;
if (in_interrupt()) {
printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
"context\n", dev->name);
return -1;
}
if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
dev->name);
return -1;
}
if (signal_pending(current))
return -EINTR;
entry = (struct hostap_cmd_queue *)
kmalloc(sizeof(*entry), GFP_ATOMIC);
if (entry == NULL) {
printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
dev->name);
return -ENOMEM;
}
memset(entry, 0, sizeof(*entry));
atomic_set(&entry->usecnt, 1);
entry->type = CMD_SLEEP;
entry->cmd = cmd;
entry->param0 = param0;
if (param1)
entry->param1 = *param1;
init_waitqueue_head(&entry->compl);
/* prepare to wait for command completion event, but do not sleep yet
*/
add_wait_queue(&entry->compl, &wait);
set_current_state(TASK_INTERRUPTIBLE);
spin_lock_irqsave(&local->cmdlock, flags);
issue = list_empty(&local->cmd_queue);
if (issue)
entry->issuing = 1;
list_add_tail(&entry->list, &local->cmd_queue);
local->cmd_queue_len++;
spin_unlock_irqrestore(&local->cmdlock, flags);
err = 0;
if (!issue)
goto wait_completion;
if (signal_pending(current))
err = -EINTR;
if (!err) {
if (hfa384x_cmd_issue(dev, entry))
err = -ETIMEDOUT;
else
issued = 1;
}
wait_completion:
if (!err && entry->type != CMD_COMPLETED) {
/* sleep until command is completed or timed out */
res = schedule_timeout(2 * HZ);
} else
res = -1;
if (!err && signal_pending(current))
err = -EINTR;
if (err && issued) {
/* the command was issued, so a CmdCompl event should occur
* soon; however, there's a pending signal and
* schedule_timeout() would be interrupted; wait a short period
* of time to avoid removing entry from the list before
* CmdCompl event */
udelay(300);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&entry->compl, &wait);
/* If entry->list is still in the list, it must be removed
* first and in this case prism2_cmd_ev() does not yet have
* local reference to it, and the data can be kfree()'d
* here. If the command completion event is still generated,
* it will be assigned to next (possibly) pending command, but
* the driver will reset the card anyway due to timeout
*
* If the entry is not in the list prism2_cmd_ev() has a local
* reference to it, but keeps cmdlock as long as the data is
* needed, so the data can be kfree()'d here. */
/* FIX: if the entry->list is in the list, it has not been completed
* yet, so removing it here is somewhat wrong.. this could cause
* references to freed memory and next list_del() causing NULL pointer
* dereference.. it would probably be better to leave the entry in the
* list and the list should be emptied during hw reset */
spin_lock_irqsave(&local->cmdlock, flags);
if (!list_empty(&entry->list)) {
printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
"(entry=%p, type=%d, res=%d)\n", dev->name, entry,
entry->type, res);
list_del_init(&entry->list);
local->cmd_queue_len--;
}
spin_unlock_irqrestore(&local->cmdlock, flags);
if (err) {
printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
dev->name, err);
res = err;
goto done;
}
if (entry->type != CMD_COMPLETED) {
u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
"completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
"param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
res, entry, entry->type, entry->cmd, entry->param0, reg,
HFA384X_INW(HFA384X_INTEN_OFF));
if (reg & HFA384X_EV_CMD) {
/* Command completion event is pending, but the
* interrupt was not delivered - probably an issue
* with pcmcia-cs configuration. */
printk(KERN_WARNING "%s: interrupt delivery does not "
"seem to work\n", dev->name);
}
prism2_io_debug_error(dev, 3);
res = -ETIMEDOUT;
goto done;
}
if (resp0 != NULL)
*resp0 = entry->resp0;
#ifndef final_version
if (entry->res) {
printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
"resp0=0x%04x\n",
dev->name, cmd, entry->res, entry->resp0);
}
#endif /* final_version */
res = entry->res;
done:
hostap_cmd_queue_free(local, entry, 1);
return res;
}
/**
* hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
* @dev: pointer to net_device
* @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
* @param0: value for Param0 register
* @callback: command completion callback function (%NULL = no callback)
* @context: context data to be given to the callback function
*
* Issue given command (possibly after waiting in command queue) and use
* callback function to indicate command completion. This can be called both
* from user and interrupt context. The callback function will be called in
* hardware IRQ context. It can be %NULL, when no function is called when
* command is completed.
*/
static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
void (*callback)(struct net_device *dev,
long context, u16 resp0,
u16 status),
long context)
{
struct hostap_interface *iface;
local_info_t *local;
int issue, ret;
unsigned long flags;
struct hostap_cmd_queue *entry;
iface = netdev_priv(dev);
local = iface->local;
if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
dev->name);
return -1;
}
entry = (struct hostap_cmd_queue *)
kmalloc(sizeof(*entry), GFP_ATOMIC);
if (entry == NULL) {
printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
"failed\n", dev->name);
return -ENOMEM;
}
memset(entry, 0, sizeof(*entry));
atomic_set(&entry->usecnt, 1);
entry->type = CMD_CALLBACK;
entry->cmd = cmd;
entry->param0 = param0;
entry->callback = callback;
entry->context = context;
spin_lock_irqsave(&local->cmdlock, flags);
issue = list_empty(&local->cmd_queue);
if (issue)
entry->issuing = 1;
list_add_tail(&entry->list, &local->cmd_queue);
local->cmd_queue_len++;
spin_unlock_irqrestore(&local->cmdlock, flags);
if (issue && hfa384x_cmd_issue(dev, entry))
ret = -ETIMEDOUT;
else
ret = 0;
hostap_cmd_queue_free(local, entry, ret);
return ret;
}
/**
* __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
* @dev: pointer to net_device
* @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
* @param0: value for Param0 register
* @io_debug_num: I/O debug error number
*
* Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
*/
static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
int io_debug_num)
{
int tries;
u16 reg;
/* wait until busy bit is clear; this should always be clear since the
* commands are serialized */
tries = HFA384X_CMD_BUSY_TIMEOUT;
while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
tries--;
udelay(1);
}
if (tries == 0) {
reg = HFA384X_INW(HFA384X_CMD_OFF);
prism2_io_debug_error(dev, io_debug_num);
printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
"reg=0x%04x\n", dev->name, io_debug_num, reg);
return -ETIMEDOUT;
}
/* write command */
HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
return 0;
}
/**
* hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
* @dev: pointer to net_device
* @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
* @param0: value for Param0 register
*/
static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
{
int res, tries;
u16 reg;
res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
if (res)
return res;
/* wait for command completion */
if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
tries = HFA384X_DL_COMPL_TIMEOUT;
else
tries = HFA384X_CMD_COMPL_TIMEOUT;
while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
tries > 0) {
tries--;
udelay(10);
}
if (tries == 0) {
reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
prism2_io_debug_error(dev, 5);
printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
"reg=0x%04x\n", dev->name, reg);
return -ETIMEDOUT;
}
res = (HFA384X_INW(HFA384X_STATUS_OFF) &
(BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
BIT(8))) >> 8;
#ifndef final_version
if (res) {
printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
dev->name, cmd, res);
}
#endif
HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
return res;
}
/**
* hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
* @dev: pointer to net_device
* @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
* @param0: value for Param0 register
*/
static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
u16 param0)
{
return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
}
/**
* prism2_cmd_ev - Prism2 command completion event handler
* @dev: pointer to net_device
*
* Interrupt handler for command completion events. Called by the main
* interrupt handler in hardware IRQ context. Read Resp0 and status registers
* from the hardware and ACK the event. Depending on the issued command type
* either wake up the sleeping process that is waiting for command completion
* or call the callback function. Issue the next command, if one is pending.
*/
static void prism2_cmd_ev(struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
struct hostap_cmd_queue *entry = NULL;
iface = netdev_priv(dev);
local = iface->local;
spin_lock(&local->cmdlock);
if (!list_empty(&local->cmd_queue)) {
entry = list_entry(local->cmd_queue.next,
struct hostap_cmd_queue, list);
atomic_inc(&entry->usecnt);
list_del_init(&entry->list);
local->cmd_queue_len--;
if (!entry->issued) {
printk(KERN_DEBUG "%s: Command completion event, but "
"cmd not issued\n", dev->name);
__hostap_cmd_queue_free(local, entry, 1);
entry = NULL;
}
}
spin_unlock(&local->cmdlock);
if (!entry) {
HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
printk(KERN_DEBUG "%s: Command completion event, but no "
"pending commands\n", dev->name);
return;
}
entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
(BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
BIT(9) | BIT(8))) >> 8;
HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
/* TODO: rest of the CmdEv handling could be moved to tasklet */
if (entry->type == CMD_SLEEP) {
entry->type = CMD_COMPLETED;
wake_up_interruptible(&entry->compl);
} else if (entry->type == CMD_CALLBACK) {
if (entry->callback)
entry->callback(dev, entry->context, entry->resp0,
entry->res);
} else {
printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
dev->name, entry->type);
}
hostap_cmd_queue_free(local, entry, 1);
/* issue next command, if pending */
entry = NULL;
spin_lock(&local->cmdlock);
if (!list_empty(&local->cmd_queue)) {
entry = list_entry(local->cmd_queue.next,
struct hostap_cmd_queue, list);
if (entry->issuing) {
/* hfa384x_cmd() has already started issuing this
* command, so do not start here */
entry = NULL;
}
if (entry)
atomic_inc(&entry->usecnt);
}
spin_unlock(&local->cmdlock);
if (entry) {
/* issue next command; if command issuing fails, remove the
* entry from cmd_queue */
int res = hfa384x_cmd_issue(dev, entry);
spin_lock(&local->cmdlock);
__hostap_cmd_queue_free(local, entry, res);
spin_unlock(&local->cmdlock);
}
}
static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
{
int tries = HFA384X_BAP_BUSY_TIMEOUT;
int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
while (res && tries > 0) {
tries--;
udelay(1);
res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
}
return res;
}
/* Offset must be even */
static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
int offset)
{
u16 o_off, s_off;
int ret = 0;
if (offset % 2 || bap > 1)
return -EINVAL;
if (bap == BAP1) {
o_off = HFA384X_OFFSET1_OFF;
s_off = HFA384X_SELECT1_OFF;
} else {
o_off = HFA384X_OFFSET0_OFF;
s_off = HFA384X_SELECT0_OFF;
}
if (hfa384x_wait_offset(dev, o_off)) {
prism2_io_debug_error(dev, 7);
printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
dev->name);
ret = -ETIMEDOUT;
goto out;
}
HFA384X_OUTW(id, s_off);
HFA384X_OUTW(offset, o_off);
if (hfa384x_wait_offset(dev, o_off)) {
prism2_io_debug_error(dev, 8);
printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
dev->name);
ret = -ETIMEDOUT;
goto out;
}
#ifndef final_version
if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
prism2_io_debug_error(dev, 9);
printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
"(%d,0x04%x,%d); reg=0x%04x\n",
dev->name, bap, id, offset, HFA384X_INW(o_off));
ret = -EINVAL;
}
#endif
out:
return ret;
}
static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
int exact_len)
{
struct hostap_interface *iface;
local_info_t *local;
int res, rlen = 0;
struct hfa384x_rid_hdr rec;
iface = netdev_priv(dev);
local = iface->local;
if (local->no_pri) {
printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
"f/w\n", dev->name, rid, len);
return -ENOTTY; /* Well.. not really correct, but return
* something unique enough.. */
}
if ((local->func->card_present && !local->func->card_present(local)) ||
local->hw_downloading)
return -ENODEV;
res = down_interruptible(&local->rid_bap_sem);
if (res)
return res;
res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
if (res) {
printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
"(res=%d, rid=%04x, len=%d)\n",
dev->name, res, rid, len);
up(&local->rid_bap_sem);
return res;
}
spin_lock_bh(&local->baplock);
res = hfa384x_setup_bap(dev, BAP0, rid, 0);
if (!res)
res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
if (le16_to_cpu(rec.len) == 0) {
/* RID not available */
res = -ENODATA;
}
rlen = (le16_to_cpu(rec.len) - 1) * 2;
if (!res && exact_len && rlen != len) {
printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
"rid=0x%04x, len=%d (expected %d)\n",
dev->name, rid, rlen, len);
res = -ENODATA;
}
if (!res)
res = hfa384x_from_bap(dev, BAP0, buf, len);
spin_unlock_bh(&local->baplock);
up(&local->rid_bap_sem);
if (res) {
if (res != -ENODATA)
printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
"len=%d) - failed - res=%d\n", dev->name, rid,
len, res);
if (res == -ETIMEDOUT)
prism2_hw_reset(dev);
return res;
}
return rlen;
}
static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
{
struct hostap_interface *iface;
local_info_t *local;
struct hfa384x_rid_hdr rec;
int res;
iface = netdev_priv(dev);
local = iface->local;
if (local->no_pri) {
printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
"f/w\n", dev->name, rid, len);
return -ENOTTY; /* Well.. not really correct, but return
* something unique enough.. */
}
if ((local->func->card_present && !local->func->card_present(local)) ||
local->hw_downloading)
return -ENODEV;
rec.rid = cpu_to_le16(rid);
/* RID len in words and +1 for rec.rid */
rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
res = down_interruptible(&local->rid_bap_sem);
if (res)
return res;
spin_lock_bh(&local->baplock);
res = hfa384x_setup_bap(dev, BAP0, rid, 0);
if (!res)
res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
if (!res)
res = hfa384x_to_bap(dev, BAP0, buf, len);
spin_unlock_bh(&local->baplock);
if (res) {
printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
"failed - res=%d\n", dev->name, rid, len, res);
up(&local->rid_bap_sem);
return res;
}
res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
up(&local->rid_bap_sem);
if (res) {
printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
"failed (res=%d, rid=%04x, len=%d)\n",
dev->name, res, rid, len);
if (res == -ETIMEDOUT)
prism2_hw_reset(dev);
}
return res;
}
static void hfa384x_disable_interrupts(struct net_device *dev)
{
/* disable interrupts and clear event status */
HFA384X_OUTW(0, HFA384X_INTEN_OFF);
HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
}
static void hfa384x_enable_interrupts(struct net_device *dev)
{
/* ack pending events and enable interrupts from selected events */
HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
}
static void hfa384x_events_no_bap0(struct net_device *dev)
{
HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
HFA384X_INTEN_OFF);
}
static void hfa384x_events_all(struct net_device *dev)
{
HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
}
static void hfa384x_events_only_cmd(struct net_device *dev)
{
HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
}
static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
{
u16 fid;
unsigned long delay;
/* FIX: this could be replace with hfa384x_cmd() if the Alloc event
* below would be handled like CmdCompl event (sleep here, wake up from
* interrupt handler */
if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
dev->name, len);
return 0xffff;
}
delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
time_before(jiffies, delay))
yield();
if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
return 0xffff;
}
fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
return fid;
}
static int prism2_reset_port(struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
int res;
iface = netdev_priv(dev);
local = iface->local;
if (!local->dev_enabled)
return 0;
res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
NULL, NULL);
if (res)
printk(KERN_DEBUG "%s: reset port failed to disable port\n",
dev->name);
else {
res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
NULL, NULL);
if (res)
printk(KERN_DEBUG "%s: reset port failed to enable "
"port\n", dev->name);
}
/* It looks like at least some STA firmware versions reset
* fragmentation threshold back to 2346 after enable command. Restore
* the configured value, if it differs from this default. */
if (local->fragm_threshold != 2346 &&
hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
local->fragm_threshold)) {
printk(KERN_DEBUG "%s: failed to restore fragmentation "
"threshold (%d) after Port0 enable\n",
dev->name, local->fragm_threshold);
}
/* Some firmwares lose antenna selection settings on reset */
(void) hostap_set_antsel(local);
return res;
}
static int prism2_get_version_info(struct net_device *dev, u16 rid,
const char *txt)
{
struct hfa384x_comp_ident comp;
struct hostap_interface *iface;
local_info_t *local;
iface = netdev_priv(dev);
local = iface->local;
if (local->no_pri) {
/* PRI f/w not yet available - cannot read RIDs */
return -1;
}
if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
return -1;
}
printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
__le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
__le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
return 0;
}
static int prism2_setup_rids(struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
u16 tmp;
int ret = 0;
iface = netdev_priv(dev);
local = iface->local;
hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
if (!local->fw_ap) {
tmp = hostap_get_porttype(local);
ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp);
if (ret) {
printk("%s: Port type setting to %d failed\n",
dev->name, tmp);
goto fail;
}
}
/* Setting SSID to empty string seems to kill the card in Host AP mode
*/
if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
local->essid);
if (ret) {
printk("%s: AP own SSID setting failed\n", dev->name);
goto fail;
}
}
ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
PRISM2_DATA_MAXLEN);
if (ret) {
printk("%s: MAC data length setting to %d failed\n",
dev->name, PRISM2_DATA_MAXLEN);
goto fail;
}
if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
printk("%s: Channel list read failed\n", dev->name);
ret = -EINVAL;
goto fail;
}
local->channel_mask = __le16_to_cpu(tmp);
if (local->channel < 1 || local->channel > 14 ||
!(local->channel_mask & (1 << (local->channel - 1)))) {
printk(KERN_WARNING "%s: Channel setting out of range "
"(%d)!\n", dev->name, local->channel);
ret = -EBUSY;
goto fail;
}
ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
if (ret) {
printk("%s: Channel setting to %d failed\n",
dev->name, local->channel);
goto fail;
}
ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
local->beacon_int);
if (ret) {
printk("%s: Beacon interval setting to %d failed\n",
dev->name, local->beacon_int);
/* this may fail with Symbol/Lucent firmware */
if (ret == -ETIMEDOUT)
goto fail;
}
ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
local->dtim_period);
if (ret) {
printk("%s: DTIM period setting to %d failed\n",
dev->name, local->dtim_period);
/* this may fail with Symbol/Lucent firmware */
if (ret == -ETIMEDOUT)
goto fail;
}
ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
local->is_promisc);
if (ret)
printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
dev->name, local->is_promisc);
if (!local->fw_ap) {
ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
local->essid);
if (ret) {
printk("%s: Desired SSID setting failed\n", dev->name);
goto fail;
}
}
/* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
* 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
* rates */
if (local->tx_rate_control == 0) {
local->tx_rate_control =
HFA384X_RATES_1MBPS |
HFA384X_RATES_2MBPS |
HFA384X_RATES_5MBPS |
HFA384X_RATES_11MBPS;
}
if (local->basic_rates == 0)
local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
if (!local->fw_ap) {
ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
local->tx_rate_control);
if (ret) {
printk("%s: TXRateControl setting to %d failed\n",
dev->name, local->tx_rate_control);
goto fail;
}
ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
local->tx_rate_control);
if (ret) {
printk("%s: cnfSupportedRates setting to %d failed\n",
dev->name, local->tx_rate_control);
}
ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
local->basic_rates);
if (ret) {
printk("%s: cnfBasicRates setting to %d failed\n",
dev->name, local->basic_rates);
}
ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
if (ret) {
printk("%s: Create IBSS setting to 1 failed\n",
dev->name);
}
}
if (local->name_set)
(void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
local->name);
if (hostap_set_encryption(local)) {
printk(KERN_INFO "%s: could not configure encryption\n",
dev->name);
}
(void) hostap_set_antsel(local);
if (hostap_set_roaming(local)) {
printk(KERN_INFO "%s: could not set host roaming\n",
dev->name);
}
if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
dev->name, local->enh_sec);
/* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
* not working correctly (last seven counters report bogus values).
* This has been fixed in 0.8.2, so enable 32-bit tallies only
* beginning with that firmware version. Another bug fix for 32-bit
* tallies in 1.4.0; should 16-bit tallies be used for some other
* versions, too? */
if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
printk(KERN_INFO "%s: cnfThirty2Tally setting "
"failed\n", dev->name);
local->tallies32 = 0;
} else
local->tallies32 = 1;
} else
local->tallies32 = 0;
hostap_set_auth_algs(local);
if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
local->fragm_threshold)) {
printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
"failed\n", dev->name, local->fragm_threshold);
}
if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
local->rts_threshold)) {
printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
dev->name, local->rts_threshold);
}
if (local->manual_retry_count >= 0 &&
hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
local->manual_retry_count)) {
printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
dev->name, local->manual_retry_count);
}
if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
local->rssi_to_dBm = le16_to_cpu(tmp);
}
if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
dev->name);
}
if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
local->generic_elem, local->generic_elem_len)) {
printk(KERN_INFO "%s: setting genericElement failed\n",
dev->name);
}
fail:
return ret;
}
static int prism2_hw_init(struct net_device *dev, int initial)
{
struct hostap_interface *iface;
local_info_t *local;
int ret, first = 1;
unsigned long start, delay;
PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
iface = netdev_priv(dev);
local = iface->local;
clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
init:
/* initialize HFA 384x */
ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
if (ret) {
printk(KERN_INFO "%s: first command failed - assuming card "
"does not have primary firmware\n", dev_info);
}
if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
/* EvStat has Cmd bit set in some cases, so retry once if no
* wait was needed */
HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
printk(KERN_DEBUG "%s: init command completed too quickly - "
"retrying\n", dev->name);
first = 0;
goto init;
}
start = jiffies;
delay = jiffies + HFA384X_INIT_TIMEOUT;
while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
time_before(jiffies, delay))
yield();
if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
printk(KERN_DEBUG "%s: assuming no Primary image in "
"flash - card initialization not completed\n",
dev_info);
local->no_pri = 1;
#ifdef PRISM2_DOWNLOAD_SUPPORT
if (local->sram_type == -1)
local->sram_type = prism2_get_ram_size(local);
#endif /* PRISM2_DOWNLOAD_SUPPORT */
return 1;
}
local->no_pri = 0;
printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
(jiffies - start) * 1000 / HZ);
HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
return 0;
}
static int prism2_hw_init2(struct net_device *dev, int initial)
{
struct hostap_interface *iface;
local_info_t *local;
int i;
iface = netdev_priv(dev);
local = iface->local;
#ifdef PRISM2_DOWNLOAD_SUPPORT
kfree(local->pda);
if (local->no_pri)
local->pda = NULL;
else
local->pda = prism2_read_pda(dev);
#endif /* PRISM2_DOWNLOAD_SUPPORT */
hfa384x_disable_interrupts(dev);
#ifndef final_version
HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
goto failed;
}
#endif
if (initial || local->pri_only) {
hfa384x_events_only_cmd(dev);
/* get card version information */
if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
hfa384x_disable_interrupts(dev);
goto failed;
}
if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
printk(KERN_DEBUG "%s: Failed to read STA f/w version "
"- only Primary f/w present\n", dev->name);
local->pri_only = 1;
return 0;
}
local->pri_only = 0;
hfa384x_disable_interrupts(dev);
}
/* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
* enable interrupts before this. This would also require some sort of
* sleeping AllocEv waiting */
/* allocate TX FIDs */
local->txfid_len = PRISM2_TXFID_LEN;
for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
if (local->txfid[i] != 0xffff) {
printk(KERN_DEBUG "%s: Using shorter TX FID "
"(1600 bytes)\n", dev->name);
local->txfid_len = 1600;
}
}
if (local->txfid[i] == 0xffff)
goto failed;
local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
}
hfa384x_events_only_cmd(dev);
if (initial) {
struct list_head *ptr;
prism2_check_sta_fw_version(local);
if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
&dev->dev_addr, 6, 1) < 0) {
printk("%s: could not get own MAC address\n",
dev->name);
}
list_for_each(ptr, &local->hostap_interfaces) {
iface = list_entry(ptr, struct hostap_interface, list);
memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
}
} else if (local->fw_ap)
prism2_check_sta_fw_version(local);
prism2_setup_rids(dev);
/* MAC is now configured, but port 0 is not yet enabled */
return 0;
failed:
if (!local->no_pri)
printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
return 1;
}
static int prism2_hw_enable(struct net_device *dev, int initial)
{
struct hostap_interface *iface;
local_info_t *local;
int was_resetting;
iface = netdev_priv(dev);
local = iface->local;
was_resetting = local->hw_resetting;
if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
printk("%s: MAC port 0 enabling failed\n", dev->name);
return 1;
}
local->hw_ready = 1;
local->hw_reset_tries = 0;
local->hw_resetting = 0;
hfa384x_enable_interrupts(dev);
/* at least D-Link DWL-650 seems to require additional port reset
* before it starts acting as an AP, so reset port automatically
* here just in case */
if (initial && prism2_reset_port(dev)) {
printk("%s: MAC port 0 reseting failed\n", dev->name);
return 1;
}
if (was_resetting && netif_queue_stopped(dev)) {
/* If hw_reset() was called during pending transmit, netif
* queue was stopped. Wake it up now since the wlan card has
* been resetted. */
netif_wake_queue(dev);
}
return 0;
}
static int prism2_hw_config(struct net_device *dev, int initial)
{
struct hostap_interface *iface;
local_info_t *local;
iface = netdev_priv(dev);
local = iface->local;
if (local->hw_downloading)
return 1;
if (prism2_hw_init(dev, initial)) {
return local->no_pri ? 0 : 1;
}
if (prism2_hw_init2(dev, initial))
return 1;
/* Enable firmware if secondary image is loaded and at least one of the
* netdevices is up. */
if (!local->pri_only &&
(initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
if (!local->dev_enabled)
prism2_callback(local, PRISM2_CALLBACK_ENABLE);
local->dev_enabled = 1;
return prism2_hw_enable(dev, initial);
}
return 0;
}
static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
{
struct hostap_interface *iface;
local_info_t *local;
iface = netdev_priv(dev);
local = iface->local;
/* Allow only command completion events during disable */
hfa384x_events_only_cmd(dev);
local->hw_ready = 0;
if (local->dev_enabled)
prism2_callback(local, PRISM2_CALLBACK_DISABLE);
local->dev_enabled = 0;
if (local->func->card_present && !local->func->card_present(local)) {
printk(KERN_DEBUG "%s: card already removed or not configured "
"during shutdown\n", dev->name);
return;
}
if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
hfa384x_disable_interrupts(dev);
if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
hfa384x_events_only_cmd(dev);
else
prism2_clear_cmd_queue(local);
}
static void prism2_hw_reset(struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
#if 0
static long last_reset = 0;
/* do not reset card more than once per second to avoid ending up in a
* busy loop reseting the card */
if (time_before_eq(jiffies, last_reset + HZ))
return;
last_reset = jiffies;
#endif
iface = netdev_priv(dev);
local = iface->local;
if (in_interrupt()) {
printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
"in interrupt context\n", dev->name);
return;
}
if (local->hw_downloading)
return;
if (local->hw_resetting) {
printk(KERN_WARNING "%s: %s: already resetting card - "
"ignoring reset request\n", dev_info, dev->name);
return;
}
local->hw_reset_tries++;
if (local->hw_reset_tries > 10) {
printk(KERN_WARNING "%s: too many reset tries, skipping\n",
dev->name);
return;
}
printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
hfa384x_disable_interrupts(dev);
local->hw_resetting = 1;
if (local->func->cor_sreset) {
/* Host system seems to hang in some cases with high traffic
* load or shared interrupts during COR sreset. Disable shared
* interrupts during reset to avoid these crashes. COS sreset
* takes quite a long time, so it is unfortunate that this
* seems to be needed. Anyway, I do not know of any better way
* of avoiding the crash. */
disable_irq(dev->irq);
local->func->cor_sreset(local);
enable_irq(dev->irq);
}
prism2_hw_shutdown(dev, 1);
prism2_hw_config(dev, 0);
local->hw_resetting = 0;
#ifdef PRISM2_DOWNLOAD_SUPPORT
if (local->dl_pri) {
printk(KERN_DEBUG "%s: persistent download of primary "
"firmware\n", dev->name);
if (prism2_download_genesis(local, local->dl_pri) < 0)
printk(KERN_WARNING "%s: download (PRI) failed\n",
dev->name);
}
if (local->dl_sec) {
printk(KERN_DEBUG "%s: persistent download of secondary "
"firmware\n", dev->name);
if (prism2_download_volatile(local, local->dl_sec) < 0)
printk(KERN_WARNING "%s: download (SEC) failed\n",
dev->name);
}
#endif /* PRISM2_DOWNLOAD_SUPPORT */
/* TODO: restore beacon TIM bits for STAs that have buffered frames */
}
static void prism2_schedule_reset(local_info_t *local)
{
schedule_work(&local->reset_queue);
}
/* Called only as scheduled task after noticing card timeout in interrupt
* context */
static void handle_reset_queue(void *data)
{
local_info_t *local = (local_info_t *) data;
printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
prism2_hw_reset(local->dev);
if (netif_queue_stopped(local->dev)) {
int i;
for (i = 0; i < PRISM2_TXFID_COUNT; i++)
if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
"wake up queue\n");
netif_wake_queue(local->dev);
break;
}
}
}
static int prism2_get_txfid_idx(local_info_t *local)
{
int idx, end;
unsigned long flags;
spin_lock_irqsave(&local->txfidlock, flags);
end = idx = local->next_txfid;
do {
if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
spin_unlock_irqrestore(&local->txfidlock, flags);
return idx;
}
idx++;
if (idx >= PRISM2_TXFID_COUNT)
idx = 0;
} while (idx != end);
spin_unlock_irqrestore(&local->txfidlock, flags);
PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
"packet dropped\n");
local->stats.tx_dropped++;
return -1;
}
/* Called only from hardware IRQ */
static void prism2_transmit_cb(struct net_device *dev, long context,
u16 resp0, u16 res)
{
struct hostap_interface *iface;
local_info_t *local;
int idx = (int) context;
iface = netdev_priv(dev);
local = iface->local;
if (res) {
printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
dev->name, res);
return;
}
if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
"idx=%d\n", dev->name, idx);
return;
}
if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
"with no pending transmit\n", dev->name);
}
if (netif_queue_stopped(dev)) {
/* ready for next TX, so wake up queue that was stopped in
* prism2_transmit() */
netif_wake_queue(dev);
}
spin_lock(&local->txfidlock);
/* With reclaim, Resp0 contains new txfid for transmit; the old txfid
* will be automatically allocated for the next TX frame */
local->intransmitfid[idx] = resp0;
PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
"resp0=0x%04x, transmit_txfid=0x%04x\n",
dev->name, idx, local->txfid[idx],
resp0, local->intransmitfid[local->next_txfid]);
idx++;
if (idx >= PRISM2_TXFID_COUNT)
idx = 0;
local->next_txfid = idx;
/* check if all TX buffers are occupied */
do {
if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
spin_unlock(&local->txfidlock);
return;
}
idx++;
if (idx >= PRISM2_TXFID_COUNT)
idx = 0;
} while (idx != local->next_txfid);
spin_unlock(&local->txfidlock);
/* no empty TX buffers, stop queue */
netif_stop_queue(dev);
}
/* Called only from software IRQ if PCI bus master is not used (with bus master
* this can be called both from software and hardware IRQ) */
static int prism2_transmit(struct net_device *dev, int idx)
{
struct hostap_interface *iface;
local_info_t *local;
int res;
iface = netdev_priv(dev);
local = iface->local;
/* The driver tries to stop netif queue so that there would not be
* more than one attempt to transmit frames going on; check that this
* is really the case */
if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
"when previous TX was pending\n", dev->name);
return -1;
}
/* stop the queue for the time that transmit is pending */
netif_stop_queue(dev);
/* transmit packet */
res = hfa384x_cmd_callback(
dev,
HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
local->txfid[idx],
prism2_transmit_cb, (long) idx);
if (res) {
struct net_device_stats *stats;
printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
"failed (res=%d)\n", dev->name, res);
stats = hostap_get_stats(dev);
stats->tx_dropped++;
netif_wake_queue(dev);
return -1;
}
dev->trans_start = jiffies;
/* Since we did not wait for command completion, the card continues
* to process on the background and we will finish handling when
* command completion event is handled (prism2_cmd_ev() function) */
return 0;
}
/* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
* send the payload with this descriptor) */
/* Called only from software IRQ */
static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
struct hfa384x_tx_frame txdesc;
struct hostap_skb_tx_data *meta;
int hdr_len, data_len, idx, res, ret = -1;
u16 tx_control, fc;
iface = netdev_priv(dev);
local = iface->local;
meta = (struct hostap_skb_tx_data *) skb->cb;
prism2_callback(local, PRISM2_CALLBACK_TX_START);
if ((local->func->card_present && !local->func->card_present(local)) ||
!local->hw_ready || local->hw_downloading || local->pri_only) {
if (net_ratelimit()) {
printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
" skipping\n", dev->name);
}
goto fail;
}
memset(&txdesc, 0, sizeof(txdesc));
/* skb->data starts with txdesc->frame_control */
hdr_len = 24;
memcpy(&txdesc.frame_control, skb->data, hdr_len);
fc = le16_to_cpu(txdesc.frame_control);
if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
(fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS) &&
skb->len >= 30) {
/* Addr4 */
memcpy(txdesc.addr4, skb->data + hdr_len, ETH_ALEN);
hdr_len += ETH_ALEN;
}
tx_control = local->tx_control;
if (meta->tx_cb_idx) {
tx_control |= HFA384X_TX_CTRL_TX_OK;
txdesc.sw_support = cpu_to_le16(meta->tx_cb_idx);
}
txdesc.tx_control = cpu_to_le16(tx_control);
txdesc.tx_rate = meta->rate;
data_len = skb->len - hdr_len;
txdesc.data_len = cpu_to_le16(data_len);
txdesc.len = cpu_to_be16(data_len);
idx = prism2_get_txfid_idx(local);
if (idx < 0)
goto fail;
if (local->frame_dump & PRISM2_DUMP_TX_HDR)
hostap_dump_tx_header(dev->name, &txdesc);
spin_lock(&local->baplock);
res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
if (!res)
res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
if (!res)
res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
skb->len - hdr_len);
spin_unlock(&local->baplock);
if (!res)
res = prism2_transmit(dev, idx);
if (res) {
printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
dev->name);
local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
schedule_work(&local->reset_queue);
goto fail;
}
ret = 0;
fail:
prism2_callback(local, PRISM2_CALLBACK_TX_END);
return ret;
}
/* Some SMP systems have reported number of odd errors with hostap_pci. fid
* register has changed values between consecutive reads for an unknown reason.
* This should really not happen, so more debugging is needed. This test
* version is a big slower, but it will detect most of such register changes
* and will try to get the correct fid eventually. */
#define EXTRA_FID_READ_TESTS
static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
{
#ifdef EXTRA_FID_READ_TESTS
u16 val, val2, val3;
int i;
for (i = 0; i < 10; i++) {
val = HFA384X_INW(reg);
val2 = HFA384X_INW(reg);
val3 = HFA384X_INW(reg);
if (val == val2 && val == val3)
return val;
printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
" %04x %04x %04x\n",
dev->name, i, reg, val, val2, val3);
if ((val == val2 || val == val3) && val != 0)
return val;
if (val2 == val3 && val2 != 0)
return val2;
}
printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
"%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
return val;
#else /* EXTRA_FID_READ_TESTS */
return HFA384X_INW(reg);
#endif /* EXTRA_FID_READ_TESTS */
}
/* Called only as a tasklet (software IRQ) */
static void prism2_rx(local_info_t *local)
{
struct net_device *dev = local->dev;
int res, rx_pending = 0;
u16 len, hdr_len, rxfid, status, macport;
struct net_device_stats *stats;
struct hfa384x_rx_frame rxdesc;
struct sk_buff *skb = NULL;
prism2_callback(local, PRISM2_CALLBACK_RX_START);
stats = hostap_get_stats(dev);
rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
#ifndef final_version
if (rxfid == 0) {
rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
rxfid);
if (rxfid == 0) {
schedule_work(&local->reset_queue);
goto rx_dropped;
}
/* try to continue with the new rxfid value */
}
#endif
spin_lock(&local->baplock);
res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
if (!res)
res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
if (res) {
spin_unlock(&local->baplock);
printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
res);
if (res == -ETIMEDOUT) {
schedule_work(&local->reset_queue);
}
goto rx_dropped;
}
len = le16_to_cpu(rxdesc.data_len);
hdr_len = sizeof(rxdesc);
status = le16_to_cpu(rxdesc.status);
macport = (status >> 8) & 0x07;
/* Drop frames with too large reported payload length. Monitor mode
* seems to sometimes pass frames (e.g., ctrl::ack) with signed and
* negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
* macport 7 */
if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
if (len >= (u16) -14) {
hdr_len -= 65535 - len;
hdr_len--;
}
len = 0;
} else {
spin_unlock(&local->baplock);
printk(KERN_DEBUG "%s: Received frame with invalid "
"length 0x%04x\n", dev->name, len);
hostap_dump_rx_header(dev->name, &rxdesc);
goto rx_dropped;
}
}
skb = dev_alloc_skb(len + hdr_len);
if (!skb) {
spin_unlock(&local->baplock);
printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
dev->name);
goto rx_dropped;
}
skb->dev = dev;
memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
if (len > 0)
res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
spin_unlock(&local->baplock);
if (res) {
printk(KERN_DEBUG "%s: RX failed to read "
"frame data\n", dev->name);
goto rx_dropped;
}
skb_queue_tail(&local->rx_list, skb);
tasklet_schedule(&local->rx_tasklet);
rx_exit:
prism2_callback(local, PRISM2_CALLBACK_RX_END);
if (!rx_pending) {
HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
}
return;
rx_dropped:
stats->rx_dropped++;
if (skb)
dev_kfree_skb(skb);
goto rx_exit;
}
/* Called only as a tasklet (software IRQ) */
static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
{
struct hfa384x_rx_frame *rxdesc;
struct net_device *dev = skb->dev;
struct hostap_80211_rx_status stats;
int hdrlen, rx_hdrlen;
rx_hdrlen = sizeof(*rxdesc);
if (skb->len < sizeof(*rxdesc)) {
/* Allow monitor mode to receive shorter frames */
if (local->iw_mode == IW_MODE_MONITOR &&
skb->len >= sizeof(*rxdesc) - 30) {
rx_hdrlen = skb->len;
} else {
dev_kfree_skb(skb);
return;
}
}
rxdesc = (struct hfa384x_rx_frame *) skb->data;
if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
skb->len >= sizeof(*rxdesc))
hostap_dump_rx_header(dev->name, rxdesc);
if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
(!local->monitor_allow_fcserr ||
local->iw_mode != IW_MODE_MONITOR))
goto drop;
if (skb->len > PRISM2_DATA_MAXLEN) {
printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
dev->name, skb->len, PRISM2_DATA_MAXLEN);
goto drop;
}
stats.mac_time = le32_to_cpu(rxdesc->time);
stats.signal = rxdesc->signal - local->rssi_to_dBm;
stats.noise = rxdesc->silence - local->rssi_to_dBm;
stats.rate = rxdesc->rate;
/* Convert Prism2 RX structure into IEEE 802.11 header */
hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(rxdesc->frame_control));
if (hdrlen > rx_hdrlen)
hdrlen = rx_hdrlen;
memmove(skb_pull(skb, rx_hdrlen - hdrlen),
&rxdesc->frame_control, hdrlen);
hostap_80211_rx(dev, skb, &stats);
return;
drop:
dev_kfree_skb(skb);
}
/* Called only as a tasklet (software IRQ) */
static void hostap_rx_tasklet(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
struct sk_buff *skb;
while ((skb = skb_dequeue(&local->rx_list)) != NULL)
hostap_rx_skb(local, skb);
}
/* Called only from hardware IRQ */
static void prism2_alloc_ev(struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
int idx;
u16 fid;
iface = netdev_priv(dev);
local = iface->local;
fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
spin_lock(&local->txfidlock);
idx = local->next_alloc;
do {
if (local->txfid[idx] == fid) {
PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
idx);
#ifndef final_version
if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
printk("Already released txfid found at idx "
"%d\n", idx);
if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
printk("Already reserved txfid found at idx "
"%d\n", idx);
#endif
local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
idx++;
local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
idx;
if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
netif_queue_stopped(dev))
netif_wake_queue(dev);
spin_unlock(&local->txfidlock);
return;
}
idx++;
if (idx >= PRISM2_TXFID_COUNT)
idx = 0;
} while (idx != local->next_alloc);
printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
"read 0x%04x) for alloc event\n", dev->name, fid,
HFA384X_INW(HFA384X_ALLOCFID_OFF));
printk(KERN_DEBUG "TXFIDs:");
for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
printk(" %04x[%04x]", local->txfid[idx],
local->intransmitfid[idx]);
printk("\n");
spin_unlock(&local->txfidlock);
/* FIX: should probably schedule reset; reference to one txfid was lost
* completely.. Bad things will happen if we run out of txfids
* Actually, this will cause netdev watchdog to notice TX timeout and
* then card reset after all txfids have been leaked. */
}
/* Called only as a tasklet (software IRQ) */
static void hostap_tx_callback(local_info_t *local,
struct hfa384x_tx_frame *txdesc, int ok,
char *payload)
{
u16 sw_support, hdrlen, len;
struct sk_buff *skb;
struct hostap_tx_callback_info *cb;
/* Make sure that frame was from us. */
if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
local->dev->name);
return;
}
sw_support = le16_to_cpu(txdesc->sw_support);
spin_lock(&local->lock);
cb = local->tx_callback;
while (cb != NULL && cb->idx != sw_support)
cb = cb->next;
spin_unlock(&local->lock);
if (cb == NULL) {
printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
local->dev->name, sw_support);
return;
}
hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(txdesc->frame_control));
len = le16_to_cpu(txdesc->data_len);
skb = dev_alloc_skb(hdrlen + len);
if (skb == NULL) {
printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
"skb\n", local->dev->name);
return;
}
memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
if (payload)
memcpy(skb_put(skb, len), payload, len);
skb->dev = local->dev;
skb->mac.raw = skb->data;
cb->func(skb, ok, cb->data);
}
/* Called only as a tasklet (software IRQ) */
static int hostap_tx_compl_read(local_info_t *local, int error,
struct hfa384x_tx_frame *txdesc,
char **payload)
{
u16 fid, len;
int res, ret = 0;
struct net_device *dev = local->dev;
fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
spin_lock(&local->baplock);
res = hfa384x_setup_bap(dev, BAP0, fid, 0);
if (!res)
res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
if (res) {
PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
"read txdesc\n", dev->name, error, fid);
if (res == -ETIMEDOUT) {
schedule_work(&local->reset_queue);
}
ret = -1;
goto fail;
}
if (txdesc->sw_support) {
len = le16_to_cpu(txdesc->data_len);
if (len < PRISM2_DATA_MAXLEN) {
*payload = (char *) kmalloc(len, GFP_ATOMIC);
if (*payload == NULL ||
hfa384x_from_bap(dev, BAP0, *payload, len)) {
PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
"frame payload\n", dev->name);
kfree(*payload);
*payload = NULL;
ret = -1;
goto fail;
}
}
}
fail:
spin_unlock(&local->baplock);
return ret;
}
/* Called only as a tasklet (software IRQ) */
static void prism2_tx_ev(local_info_t *local)
{
struct net_device *dev = local->dev;
char *payload = NULL;
struct hfa384x_tx_frame txdesc;
if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
goto fail;
if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
"retry_count=%d tx_rate=%d seq_ctrl=%d "
"duration_id=%d\n",
dev->name, le16_to_cpu(txdesc.status),
txdesc.retry_count, txdesc.tx_rate,
le16_to_cpu(txdesc.seq_ctrl),
le16_to_cpu(txdesc.duration_id));
}
if (txdesc.sw_support)
hostap_tx_callback(local, &txdesc, 1, payload);
kfree(payload);
fail:
HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
}
/* Called only as a tasklet (software IRQ) */
static void hostap_sta_tx_exc_tasklet(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
struct sk_buff *skb;
while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
struct hfa384x_tx_frame *txdesc =
(struct hfa384x_tx_frame *) skb->data;
if (skb->len >= sizeof(*txdesc)) {
/* Convert Prism2 RX structure into IEEE 802.11 header
*/
u16 fc = le16_to_cpu(txdesc->frame_control);
int hdrlen = hostap_80211_get_hdrlen(fc);
memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
&txdesc->frame_control, hdrlen);
hostap_handle_sta_tx_exc(local, skb);
}
dev_kfree_skb(skb);
}
}
/* Called only as a tasklet (software IRQ) */
static void prism2_txexc(local_info_t *local)
{
struct net_device *dev = local->dev;
u16 status, fc;
int show_dump, res;
char *payload = NULL;
struct hfa384x_tx_frame txdesc;
show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
local->stats.tx_errors++;
res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
if (res)
return;
status = le16_to_cpu(txdesc.status);
/* 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 */
if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
{
union iwreq_data wrqu;
/* Copy 802.11 dest address. */
memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
wrqu.addr.sa_family = ARPHRD_ETHER;
wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
} else
show_dump = 1;
if (local->iw_mode == IW_MODE_MASTER ||
local->iw_mode == IW_MODE_REPEAT ||
local->wds_type & HOSTAP_WDS_AP_CLIENT) {
struct sk_buff *skb;
skb = dev_alloc_skb(sizeof(txdesc));
if (skb) {
memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
sizeof(txdesc));
skb_queue_tail(&local->sta_tx_exc_list, skb);
tasklet_schedule(&local->sta_tx_exc_tasklet);
}
}
if (txdesc.sw_support)
hostap_tx_callback(local, &txdesc, 0, payload);
kfree(payload);
if (!show_dump)
return;
PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
" tx_control=%04x\n",
dev->name, status,
status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
le16_to_cpu(txdesc.tx_control));
fc = le16_to_cpu(txdesc.frame_control);
PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x "
"(%s%s%s::%d%s%s)\n",
txdesc.retry_count, txdesc.tx_rate, fc,
WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT ? "Mgmt" : "",
WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL ? "Ctrl" : "",
WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA ? "Data" : "",
WLAN_FC_GET_STYPE(fc) >> 4,
fc & IEEE80211_FCTL_TODS ? " ToDS" : "",
fc & IEEE80211_FCTL_FROMDS ? " FromDS" : "");
PDEBUG(DEBUG_EXTRA, " A1=" MACSTR " A2=" MACSTR " A3="
MACSTR " A4=" MACSTR "\n",
MAC2STR(txdesc.addr1), MAC2STR(txdesc.addr2),
MAC2STR(txdesc.addr3), MAC2STR(txdesc.addr4));
}
/* Called only as a tasklet (software IRQ) */
static void hostap_info_tasklet(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
struct sk_buff *skb;
while ((skb = skb_dequeue(&local->info_list)) != NULL) {
hostap_info_process(local, skb);
dev_kfree_skb(skb);
}
}
/* Called only as a tasklet (software IRQ) */
static void prism2_info(local_info_t *local)
{
struct net_device *dev = local->dev;
u16 fid;
int res, left;
struct hfa384x_info_frame info;
struct sk_buff *skb;
fid = HFA384X_INW(HFA384X_INFOFID_OFF);
spin_lock(&local->baplock);
res = hfa384x_setup_bap(dev, BAP0, fid, 0);
if (!res)
res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
if (res) {
spin_unlock(&local->baplock);
printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
fid);
if (res == -ETIMEDOUT) {
schedule_work(&local->reset_queue);
}
goto out;
}
le16_to_cpus(&info.len);
le16_to_cpus(&info.type);
left = (info.len - 1) * 2;
if (info.len & 0x8000 || info.len == 0 || left > 2060) {
/* data register seems to give 0x8000 in some error cases even
* though busy bit is not set in offset register;
* in addition, length must be at least 1 due to type field */
spin_unlock(&local->baplock);
printk(KERN_DEBUG "%s: Received info frame with invalid "
"length 0x%04x (type 0x%04x)\n", dev->name, info.len,
info.type);
goto out;
}
skb = dev_alloc_skb(sizeof(info) + left);
if (skb == NULL) {
spin_unlock(&local->baplock);
printk(KERN_DEBUG "%s: Could not allocate skb for info "
"frame\n", dev->name);
goto out;
}
memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
{
spin_unlock(&local->baplock);
printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
"len=0x%04x, type=0x%04x\n",
dev->name, fid, info.len, info.type);
dev_kfree_skb(skb);
goto out;
}
spin_unlock(&local->baplock);
skb_queue_tail(&local->info_list, skb);
tasklet_schedule(&local->info_tasklet);
out:
HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
}
/* Called only as a tasklet (software IRQ) */
static void hostap_bap_tasklet(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
struct net_device *dev = local->dev;
u16 ev;
int frames = 30;
if (local->func->card_present && !local->func->card_present(local))
return;
set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
/* Process all pending BAP events without generating new interrupts
* for them */
while (frames-- > 0) {
ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
break;
if (ev & HFA384X_EV_RX)
prism2_rx(local);
if (ev & HFA384X_EV_INFO)
prism2_info(local);
if (ev & HFA384X_EV_TX)
prism2_tx_ev(local);
if (ev & HFA384X_EV_TXEXC)
prism2_txexc(local);
}
set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
/* Enable interrupts for new BAP events */
hfa384x_events_all(dev);
clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
}
/* Called only from hardware IRQ */
static void prism2_infdrop(struct net_device *dev)
{
static unsigned long last_inquire = 0;
PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
/* some firmware versions seem to get stuck with
* full CommTallies in high traffic load cases; every
* packet will then cause INFDROP event and CommTallies
* info frame will not be sent automatically. Try to
* get out of this state by inquiring CommTallies. */
if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
HFA384X_INFO_COMMTALLIES, NULL, 0);
last_inquire = jiffies;
}
}
/* Called only from hardware IRQ */
static void prism2_ev_tick(struct net_device *dev)
{
struct hostap_interface *iface;
local_info_t *local;
u16 evstat, inten;
static int prev_stuck = 0;
iface = netdev_priv(dev);
local = iface->local;
if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
local->last_tick_timer) {
evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
inten = HFA384X_INW(HFA384X_INTEN_OFF);
if (!prev_stuck) {
printk(KERN_INFO "%s: SW TICK stuck? "
"bits=0x%lx EvStat=%04x IntEn=%04x\n",
dev->name, local->bits, evstat, inten);
}
local->sw_tick_stuck++;
if ((evstat & HFA384X_BAP0_EVENTS) &&
(inten & HFA384X_BAP0_EVENTS)) {
printk(KERN_INFO "%s: trying to recover from IRQ "
"hang\n", dev->name);
hfa384x_events_no_bap0(dev);
}
prev_stuck = 1;
} else
prev_stuck = 0;
}
/* Called only from hardware IRQ */
static void prism2_check_magic(local_info_t *local)
{
/* at least PCI Prism2.5 with bus mastering seems to sometimes
* return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
* register once or twice seems to get the correct value.. PCI cards
* cannot anyway be removed during normal operation, so there is not
* really any need for this verification with them. */
#ifndef PRISM2_PCI
#ifndef final_version
static unsigned long last_magic_err = 0;
struct net_device *dev = local->dev;
if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
if (!local->hw_ready)
return;
HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
if (time_after(jiffies, last_magic_err + 10 * HZ)) {
printk("%s: Interrupt, but SWSUPPORT0 does not match: "
"%04X != %04X - card removed?\n", dev->name,
HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
HFA384X_MAGIC);
last_magic_err = jiffies;
} else if (net_ratelimit()) {
printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
"MAGIC=%04x\n", dev->name,
HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
HFA384X_MAGIC);
}
if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
schedule_work(&local->reset_queue);
return;
}
#endif /* final_version */
#endif /* !PRISM2_PCI */
}
/* Called only from hardware IRQ */
static irqreturn_t prism2_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *) dev_id;
struct hostap_interface *iface;
local_info_t *local;
int events = 0;
u16 ev;
iface = netdev_priv(dev);
local = iface->local;
prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
if (local->func->card_present && !local->func->card_present(local)) {
if (net_ratelimit()) {
printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
dev->name);
}
return IRQ_HANDLED;
}
prism2_check_magic(local);
for (;;) {
ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
if (ev == 0xffff) {
if (local->shutdown)
return IRQ_HANDLED;
HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
dev->name);
return IRQ_HANDLED;
}
ev &= HFA384X_INW(HFA384X_INTEN_OFF);
if (ev == 0)
break;
if (ev & HFA384X_EV_CMD) {
prism2_cmd_ev(dev);
}
/* Above events are needed even before hw is ready, but other
* events should be skipped during initialization. This may
* change for AllocEv if allocate_fid is implemented without
* busy waiting. */
if (!local->hw_ready || local->hw_resetting ||
!local->dev_enabled) {
ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
if (ev & HFA384X_EV_CMD)
goto next_event;
if ((ev & HFA384X_EVENT_MASK) == 0)
return IRQ_HANDLED;
if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
net_ratelimit()) {
printk(KERN_DEBUG "%s: prism2_interrupt: hw "
"not ready; skipping events 0x%04x "
"(IntEn=0x%04x)%s%s%s\n",
dev->name, ev,
HFA384X_INW(HFA384X_INTEN_OFF),
!local->hw_ready ? " (!hw_ready)" : "",
local->hw_resetting ?
" (hw_resetting)" : "",
!local->dev_enabled ?
" (!dev_enabled)" : "");
}
HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
return IRQ_HANDLED;
}
if (ev & HFA384X_EV_TICK) {
prism2_ev_tick(dev);
HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
}
if (ev & HFA384X_EV_ALLOC) {
prism2_alloc_ev(dev);
HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
}
/* Reading data from the card is quite time consuming, so do it
* in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
* and unmasked after needed data has been read completely. */
if (ev & HFA384X_BAP0_EVENTS) {
hfa384x_events_no_bap0(dev);
tasklet_schedule(&local->bap_tasklet);
}
#ifndef final_version
if (ev & HFA384X_EV_WTERR) {
PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
}
#endif /* final_version */
if (ev & HFA384X_EV_INFDROP) {
prism2_infdrop(dev);
HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
}
next_event:
events++;
if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
"(EvStat=0x%04x)\n",
PRISM2_MAX_INTERRUPT_EVENTS,
HFA384X_INW(HFA384X_EVSTAT_OFF));
break;
}
}
prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
return IRQ_RETVAL(events);
}
static void prism2_check_sta_fw_version(local_info_t *local)
{
struct hfa384x_comp_ident comp;
int id, variant, major, minor;
if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
&comp, sizeof(comp), 1) < 0)
return;
local->fw_ap = 0;
id = le16_to_cpu(comp.id);
if (id != HFA384X_COMP_ID_STA) {
if (id == HFA384X_COMP_ID_FW_AP)
local->fw_ap = 1;
return;
}
major = __le16_to_cpu(comp.major);
minor = __le16_to_cpu(comp.minor);
variant = __le16_to_cpu(comp.variant);
local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
/* Station firmware versions before 1.4.x seem to have a bug in
* firmware-based WEP encryption when using Host AP mode, so use
* host_encrypt as a default for them. Firmware version 1.4.9 is the
* first one that has been seen to produce correct encryption, but the
* bug might be fixed before that (although, at least 1.4.2 is broken).
*/
local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
!local->fw_encrypt_ok) {
printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
"a workaround for firmware bug in Host AP mode WEP\n",
local->dev->name);
local->host_encrypt = 1;
}
/* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
* in station firmware versions before 1.5.x. With these versions, the
* driver uses a workaround with bogus frame format (4th address after
* the payload). This is not compatible with other AP devices. Since
* the firmware bug is fixed in the latest station firmware versions,
* automatically enable standard compliant mode for cards using station
* firmware version 1.5.0 or newer. */
if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
else {
printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
"workaround for firmware bug in Host AP mode WDS\n",
local->dev->name);
}
hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
}
static void prism2_crypt_deinit_entries(local_info_t *local, int force)
{
struct list_head *ptr, *n;
struct ieee80211_crypt_data *entry;
for (ptr = local->crypt_deinit_list.next, n = ptr->next;
ptr != &local->crypt_deinit_list; ptr = n, n = ptr->next) {
entry = list_entry(ptr, struct ieee80211_crypt_data, list);
if (atomic_read(&entry->refcnt) != 0 && !force)
continue;
list_del(ptr);
if (entry->ops)
entry->ops->deinit(entry->priv);
kfree(entry);
}
}
static void prism2_crypt_deinit_handler(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
unsigned long flags;
spin_lock_irqsave(&local->lock, flags);
prism2_crypt_deinit_entries(local, 0);
if (!list_empty(&local->crypt_deinit_list)) {
printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
"deletion list\n", local->dev->name);
local->crypt_deinit_timer.expires = jiffies + HZ;
add_timer(&local->crypt_deinit_timer);
}
spin_unlock_irqrestore(&local->lock, flags);
}
static void hostap_passive_scan(unsigned long data)
{
local_info_t *local = (local_info_t *) data;
struct net_device *dev = local->dev;
u16 channel;
if (local->passive_scan_interval <= 0)
return;
if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
int max_tries = 16;
/* Even though host system does not really know when the WLAN
* MAC is sending frames, try to avoid changing channels for
* passive scanning when a host-generated frame is being
* transmitted */
if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
printk(KERN_DEBUG "%s: passive scan detected pending "
"TX - delaying\n", dev->name);
local->passive_scan_timer.expires = jiffies + HZ / 10;
add_timer(&local->passive_scan_timer);
return;
}
do {
local->passive_scan_channel++;
if (local->passive_scan_channel > 14)
local->passive_scan_channel = 1;
max_tries--;
} while (!(local->channel_mask &
(1 << (local->passive_scan_channel - 1))) &&
max_tries > 0);
if (max_tries == 0) {
printk(KERN_INFO "%s: no allowed passive scan channels"
" found\n", dev->name);
return;
}
printk(KERN_DEBUG "%s: passive scan channel %d\n",
dev->name, local->passive_scan_channel);
channel = local->passive_scan_channel;
local->passive_scan_state = PASSIVE_SCAN_WAIT;
local->passive_scan_timer.expires = jiffies + HZ / 10;
} else {
channel = local->channel;
local->passive_scan_state = PASSIVE_SCAN_LISTEN;
local->passive_scan_timer.expires = jiffies +
local->passive_scan_interval * HZ;
}
if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
(HFA384X_TEST_CHANGE_CHANNEL << 8),
channel, NULL, 0))
printk(KERN_ERR "%s: passive scan channel set %d "
"failed\n", dev->name, channel);
add_timer(&local->passive_scan_timer);
}
/* Called only as a scheduled task when communications quality values should
* be updated. */
static void handle_comms_qual_update(void *data)
{
local_info_t *local = data;
prism2_update_comms_qual(local->dev);
}
/* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
* used to monitor that local->last_tick_timer is being updated. If not,
* interrupt busy-loop is assumed and driver tries to recover by masking out
* some events. */
static void hostap_tick_timer(unsigned long data)
{
static unsigned long last_inquire = 0;
local_info_t *local = (local_info_t *) data;
local->last_tick_timer = jiffies;
/* Inquire CommTallies every 10 seconds to keep the statistics updated
* more often during low load and when using 32-bit tallies. */
if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
!local->hw_downloading && local->hw_ready &&
!local->hw_resetting && local->dev_enabled) {
hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
HFA384X_INFO_COMMTALLIES, NULL, 0);
last_inquire = jiffies;
}
if ((local->last_comms_qual_update == 0 ||
time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
(local->iw_mode == IW_MODE_INFRA ||
local->iw_mode == IW_MODE_ADHOC)) {
schedule_work(&local->comms_qual_update);
}
local->tick_timer.expires = jiffies + 2 * HZ;
add_timer(&local->tick_timer);
}
#ifndef PRISM2_NO_PROCFS_DEBUG
static int prism2_registers_proc_read(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
char *p = page;
local_info_t *local = (local_info_t *) data;
if (off != 0) {
*eof = 1;
return 0;
}
#define SHOW_REG(n) \
p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
SHOW_REG(CMD);
SHOW_REG(PARAM0);
SHOW_REG(PARAM1);
SHOW_REG(PARAM2);
SHOW_REG(STATUS);
SHOW_REG(RESP0);
SHOW_REG(RESP1);
SHOW_REG(RESP2);
SHOW_REG(INFOFID);
SHOW_REG(CONTROL);
SHOW_REG(SELECT0);
SHOW_REG(SELECT1);
SHOW_REG(OFFSET0);
SHOW_REG(OFFSET1);
SHOW_REG(RXFID);
SHOW_REG(ALLOCFID);
SHOW_REG(TXCOMPLFID);
SHOW_REG(SWSUPPORT0);
SHOW_REG(SWSUPPORT1);
SHOW_REG(SWSUPPORT2);
SHOW_REG(EVSTAT);
SHOW_REG(INTEN);
SHOW_REG(EVACK);
/* Do not read data registers, because they change the state of the
* MAC (offset += 2) */
/* SHOW_REG(DATA0); */
/* SHOW_REG(DATA1); */
SHOW_REG(AUXPAGE);
SHOW_REG(AUXOFFSET);
/* SHOW_REG(AUXDATA); */
#ifdef PRISM2_PCI
SHOW_REG(PCICOR);
SHOW_REG(PCIHCR);
SHOW_REG(PCI_M0_ADDRH);
SHOW_REG(PCI_M0_ADDRL);
SHOW_REG(PCI_M0_LEN);
SHOW_REG(PCI_M0_CTL);
SHOW_REG(PCI_STATUS);
SHOW_REG(PCI_M1_ADDRH);
SHOW_REG(PCI_M1_ADDRL);
SHOW_REG(PCI_M1_LEN);
SHOW_REG(PCI_M1_CTL);
#endif /* PRISM2_PCI */
return (p - page);
}
#endif /* PRISM2_NO_PROCFS_DEBUG */
struct set_tim_data {
struct list_head list;
int aid;
int set;
};
static int prism2_set_tim(struct net_device *dev, int aid, int set)
{
struct list_head *ptr;
struct set_tim_data *new_entry;
struct hostap_interface *iface;
local_info_t *local;
iface = netdev_priv(dev);
local = iface->local;
new_entry = (struct set_tim_data *)
kmalloc(sizeof(*new_entry), GFP_ATOMIC);
if (new_entry == NULL) {
printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
local->dev->name);
return -ENOMEM;
}
memset(new_entry, 0, sizeof(*new_entry));
new_entry->aid = aid;
new_entry->set = set;
spin_lock_bh(&local->set_tim_lock);
list_for_each(ptr, &local->set_tim_list) {
struct set_tim_data *entry =
list_entry(ptr, struct set_tim_data, list);
if (entry->aid == aid) {
PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
"set=%d ==> %d\n",
local->dev->name, aid, entry->set, set);
entry->set = set;
kfree(new_entry);
new_entry = NULL;
break;
}
}
if (new_entry)
list_add_tail(&new_entry->list, &local->set_tim_list);
spin_unlock_bh(&local->set_tim_lock);
schedule_work(&local->set_tim_queue);
return 0;
}
static void handle_set_tim_queue(void *data)
{
local_info_t *local = (local_info_t *) data;
struct set_tim_data *entry;
u16 val;
for (;;) {
entry = NULL;
spin_lock_bh(&local->set_tim_lock);
if (!list_empty(&local->set_tim_list)) {
entry = list_entry(local->set_tim_list.next,
struct set_tim_data, list);
list_del(&entry->list);
}
spin_unlock_bh(&local->set_tim_lock);
if (!entry)
break;
PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
local->dev->name, entry->aid, entry->set);
val = entry->aid;
if (entry->set)
val |= 0x8000;
if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
"set=%d)\n",
local->dev->name, entry->aid, entry->set);
}
kfree(entry);
}
}
static void prism2_clear_set_tim_queue(local_info_t *local)
{
struct list_head *ptr, *n;
list_for_each_safe(ptr, n, &local->set_tim_list) {
struct set_tim_data *entry;
entry = list_entry(ptr, struct set_tim_data, list);
list_del(&entry->list);
kfree(entry);
}
}
/*
* HostAP uses two layers of net devices, where the inner
* layer gets called all the time from the outer layer.
* This is a natural nesting, which needs a split lock type.
*/
static struct lock_class_key hostap_netdev_xmit_lock_key;
static struct net_device *
prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
struct device *sdev)
{
struct net_device *dev;
struct hostap_interface *iface;
struct local_info *local;
int len, i, ret;
if (funcs == NULL)
return NULL;
len = strlen(dev_template);
if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
dev_template);
return NULL;
}
len = sizeof(struct hostap_interface) +
3 + sizeof(struct local_info) +
3 + sizeof(struct ap_data);
dev = alloc_etherdev(len);
if (dev == NULL)
return NULL;
iface = netdev_priv(dev);
local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
local->dev = iface->dev = dev;
iface->local = local;
iface->type = HOSTAP_INTERFACE_MASTER;
INIT_LIST_HEAD(&local->hostap_interfaces);
local->hw_module = THIS_MODULE;
#ifdef PRISM2_IO_DEBUG
local->io_debug_enabled = 1;
#endif /* PRISM2_IO_DEBUG */
local->func = funcs;
local->func->cmd = hfa384x_cmd;
local->func->read_regs = hfa384x_read_regs;
local->func->get_rid = hfa384x_get_rid;
local->func->set_rid = hfa384x_set_rid;
local->func->hw_enable = prism2_hw_enable;
local->func->hw_config = prism2_hw_config;
local->func->hw_reset = prism2_hw_reset;
local->func->hw_shutdown = prism2_hw_shutdown;
local->func->reset_port = prism2_reset_port;
local->func->schedule_reset = prism2_schedule_reset;
#ifdef PRISM2_DOWNLOAD_SUPPORT
local->func->read_aux = prism2_download_aux_dump;
local->func->download = prism2_download;
#endif /* PRISM2_DOWNLOAD_SUPPORT */
local->func->tx = prism2_tx_80211;
local->func->set_tim = prism2_set_tim;
local->func->need_tx_headroom = 0; /* no need to add txdesc in
* skb->data (FIX: maybe for DMA bus
* mastering? */
local->mtu = mtu;
rwlock_init(&local->iface_lock);
spin_lock_init(&local->txfidlock);
spin_lock_init(&local->cmdlock);
spin_lock_init(&local->baplock);
spin_lock_init(&local->lock);
init_MUTEX(&local->rid_bap_sem);
if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
card_idx = 0;
local->card_idx = card_idx;
len = strlen(essid);
memcpy(local->essid, essid,
len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
local->essid[MAX_SSID_LEN] = '\0';
i = GET_INT_PARM(iw_mode, card_idx);
if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
i == IW_MODE_MONITOR) {
local->iw_mode = i;
} else {
printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
"IW_MODE_MASTER\n", i);
local->iw_mode = IW_MODE_MASTER;
}
local->channel = GET_INT_PARM(channel, card_idx);
local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
local->wds_max_connections = 16;
local->tx_control = HFA384X_TX_CTRL_FLAGS;
local->manual_retry_count = -1;
local->rts_threshold = 2347;
local->fragm_threshold = 2346;
local->rssi_to_dBm = 100; /* default; to be overriden by
* cnfDbmAdjust, if available */
local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
local->sram_type = -1;
local->scan_channel_mask = 0xffff;
/* Initialize task queue structures */
INIT_WORK(&local->reset_queue, handle_reset_queue, local);
INIT_WORK(&local->set_multicast_list_queue,
hostap_set_multicast_list_queue, local->dev);
INIT_WORK(&local->set_tim_queue, handle_set_tim_queue, local);
INIT_LIST_HEAD(&local->set_tim_list);
spin_lock_init(&local->set_tim_lock);
INIT_WORK(&local->comms_qual_update, handle_comms_qual_update, local);
/* Initialize tasklets for handling hardware IRQ related operations
* outside hw IRQ handler */
#define HOSTAP_TASKLET_INIT(q, f, d) \
do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
while (0)
HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
(unsigned long) local);
HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
(unsigned long) local);
hostap_info_init(local);
HOSTAP_TASKLET_INIT(&local->rx_tasklet,
hostap_rx_tasklet, (unsigned long) local);
skb_queue_head_init(&local->rx_list);
HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
hostap_sta_tx_exc_tasklet, (unsigned long) local);
skb_queue_head_init(&local->sta_tx_exc_list);
INIT_LIST_HEAD(&local->cmd_queue);
init_waitqueue_head(&local->hostscan_wq);
INIT_LIST_HEAD(&local->crypt_deinit_list);
init_timer(&local->crypt_deinit_timer);
local->crypt_deinit_timer.data = (unsigned long) local;
local->crypt_deinit_timer.function = prism2_crypt_deinit_handler;
init_timer(&local->passive_scan_timer);
local->passive_scan_timer.data = (unsigned long) local;
local->passive_scan_timer.function = hostap_passive_scan;
init_timer(&local->tick_timer);
local->tick_timer.data = (unsigned long) local;
local->tick_timer.function = hostap_tick_timer;
local->tick_timer.expires = jiffies + 2 * HZ;
add_timer(&local->tick_timer);
INIT_LIST_HEAD(&local->bss_list);
hostap_setup_dev(dev, local, 1);
local->saved_eth_header_parse = dev->hard_header_parse;
dev->hard_start_xmit = hostap_master_start_xmit;
dev->type = ARPHRD_IEEE80211;
dev->hard_header_parse = hostap_80211_header_parse;
rtnl_lock();
ret = dev_alloc_name(dev, "wifi%d");
SET_NETDEV_DEV(dev, sdev);
if (ret >= 0)
ret = register_netdevice(dev);
lockdep_set_class(&dev->_xmit_lock, &hostap_netdev_xmit_lock_key);
rtnl_unlock();
if (ret < 0) {
printk(KERN_WARNING "%s: register netdevice failed!\n",
dev_info);
goto fail;
}
printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
#ifndef PRISM2_NO_PROCFS_DEBUG
create_proc_read_entry("registers", 0, local->proc,
prism2_registers_proc_read, local);
#endif /* PRISM2_NO_PROCFS_DEBUG */
hostap_init_data(local);
return dev;
fail:
free_netdev(dev);
return NULL;
}
static int hostap_hw_ready(struct net_device *dev)
{
struct hostap_interface *iface;
struct local_info *local;
iface = netdev_priv(dev);
local = iface->local;
local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
"", dev_template);
if (local->ddev) {
if (local->iw_mode == IW_MODE_INFRA ||
local->iw_mode == IW_MODE_ADHOC) {
netif_carrier_off(local->dev);
netif_carrier_off(local->ddev);
}
hostap_init_proc(local);
hostap_init_ap_proc(local);
return 0;
}
return -1;
}
static void prism2_free_local_data(struct net_device *dev)
{
struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
int i;
struct hostap_interface *iface;
struct local_info *local;
struct list_head *ptr, *n;
if (dev == NULL)
return;
iface = netdev_priv(dev);
local = iface->local;
/* Unregister all netdevs before freeing local data. */
list_for_each_safe(ptr, n, &local->hostap_interfaces) {
iface = list_entry(ptr, struct hostap_interface, list);
if (iface->type == HOSTAP_INTERFACE_MASTER) {
/* special handling for this interface below */
continue;
}
hostap_remove_interface(iface->dev, 0, 1);
}
unregister_netdev(local->dev);
flush_scheduled_work();
if (timer_pending(&local->crypt_deinit_timer))
del_timer(&local->crypt_deinit_timer);
prism2_crypt_deinit_entries(local, 1);
if (timer_pending(&local->passive_scan_timer))
del_timer(&local->passive_scan_timer);
if (timer_pending(&local->tick_timer))
del_timer(&local->tick_timer);
prism2_clear_cmd_queue(local);
skb_queue_purge(&local->info_list);
skb_queue_purge(&local->rx_list);
skb_queue_purge(&local->sta_tx_exc_list);
if (local->dev_enabled)
prism2_callback(local, PRISM2_CALLBACK_DISABLE);
for (i = 0; i < WEP_KEYS; i++) {
struct ieee80211_crypt_data *crypt = local->crypt[i];
if (crypt) {
if (crypt->ops)
crypt->ops->deinit(crypt->priv);
kfree(crypt);
local->crypt[i] = NULL;
}
}
if (local->ap != NULL)
hostap_free_data(local->ap);
#ifndef PRISM2_NO_PROCFS_DEBUG
if (local->proc != NULL)
remove_proc_entry("registers", local->proc);
#endif /* PRISM2_NO_PROCFS_DEBUG */
hostap_remove_proc(local);
tx_cb = local->tx_callback;
while (tx_cb != NULL) {
tx_cb_prev = tx_cb;
tx_cb = tx_cb->next;
kfree(tx_cb_prev);
}
hostap_set_hostapd(local, 0, 0);
hostap_set_hostapd_sta(local, 0, 0);
for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
if (local->frag_cache[i].skb != NULL)
dev_kfree_skb(local->frag_cache[i].skb);
}
#ifdef PRISM2_DOWNLOAD_SUPPORT
prism2_download_free_data(local->dl_pri);
prism2_download_free_data(local->dl_sec);
#endif /* PRISM2_DOWNLOAD_SUPPORT */
prism2_clear_set_tim_queue(local);
list_for_each_safe(ptr, n, &local->bss_list) {
struct hostap_bss_info *bss =
list_entry(ptr, struct hostap_bss_info, list);
kfree(bss);
}
kfree(local->pda);
kfree(local->last_scan_results);
kfree(local->generic_elem);
free_netdev(local->dev);
}
#ifndef PRISM2_PLX
static void prism2_suspend(struct net_device *dev)
{
struct hostap_interface *iface;
struct local_info *local;
union iwreq_data wrqu;
iface = dev->priv;
local = iface->local;
/* Send disconnect event, e.g., to trigger reassociation after resume
* if wpa_supplicant is used. */
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
/* Disable hardware and firmware */
prism2_hw_shutdown(dev, 0);
}
#endif /* PRISM2_PLX */
/* These might at some point be compiled separately and used as separate
* kernel modules or linked into one */
#ifdef PRISM2_DOWNLOAD_SUPPORT
#include "hostap_download.c"
#endif /* PRISM2_DOWNLOAD_SUPPORT */
#ifdef PRISM2_CALLBACK
/* External hostap_callback.c file can be used to, e.g., blink activity led.
* This can use platform specific code and must define prism2_callback()
* function (if PRISM2_CALLBACK is not defined, these function calls are not
* used. */
#include "hostap_callback.c"
#endif /* PRISM2_CALLBACK */
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