www.pudn.com > madwifi-0.9.2-src.rar > ah_osdep.c
/*-
* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting, Atheros
* Communications, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the following conditions are met:
* 1. The materials contained herein are unmodified and are used
* unmodified.
* 2. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following NO
* ''WARRANTY'' disclaimer below (''Disclaimer''), without
* modification.
* 3. Redistributions in binary form must reproduce at minimum a
* disclaimer similar to the Disclaimer below and any redistribution
* must be conditioned upon including a substantially similar
* Disclaimer requirement for further binary redistribution.
* 4. Neither the names of the above-listed copyright holders nor the
* names of any contributors may be used to endorse or promote
* product derived from this software without specific prior written
* permission.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT,
* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
* FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGES.
*
* $Id: ah_osdep.c 1574 2006-05-19 10:25:45Z kelmo $
*/
#include "opt_ah.h"
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "ah.h"
#ifndef __MOD_INC_USE_COUNT
#define AH_MOD_INC_USE_COUNT(_m) \
if (!try_module_get(_m)) { \
printk(KERN_WARNING "try_module_get failed\n"); \
return NULL; \
}
#define AH_MOD_DEC_USE_COUNT(_m) module_put(_m)
#else
#define AH_MOD_INC_USE_COUNT(_m) MOD_INC_USE_COUNT
#define AH_MOD_DEC_USE_COUNT(_m) MOD_DEC_USE_COUNT
#endif
#ifdef AH_DEBUG
static int ath_hal_debug = 0;
#endif
int ath_hal_dma_beacon_response_time = 2; /* in TU's */
int ath_hal_sw_beacon_response_time = 10; /* in TU's */
int ath_hal_additional_swba_backoff = 0; /* in TU's */
struct ath_hal *
_ath_hal_attach(u_int16_t devid, HAL_SOFTC sc,
HAL_BUS_TAG t, HAL_BUS_HANDLE h, void* s)
{
HAL_STATUS status;
struct ath_hal *ah = ath_hal_attach(devid, sc, t, h, &status);
*(HAL_STATUS *)s = status;
if (ah)
AH_MOD_INC_USE_COUNT(THIS_MODULE);
return ah;
}
void
ath_hal_detach(struct ath_hal *ah)
{
(*ah->ah_detach)(ah);
AH_MOD_DEC_USE_COUNT(THIS_MODULE);
}
/*
* Print/log message support.
*/
void __ahdecl
ath_hal_vprintf(struct ath_hal *ah, const char* fmt, va_list ap)
{
char buf[1024]; /* XXX */
vsnprintf(buf, sizeof(buf), fmt, ap);
printk("%s", buf);
}
void __ahdecl
ath_hal_printf(struct ath_hal *ah, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
ath_hal_vprintf(ah, fmt, ap);
va_end(ap);
}
EXPORT_SYMBOL(ath_hal_printf);
/*
* Format an Ethernet MAC for printing.
*/
const char* __ahdecl
ath_hal_ether_sprintf(const u_int8_t *mac)
{
static char etherbuf[18];
snprintf(etherbuf, sizeof(etherbuf), "%02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
return etherbuf;
}
#ifdef AH_ASSERT
void __ahdecl
ath_hal_assert_failed(const char* filename, int lineno, const char *msg)
{
printk("Atheros HAL assertion failure: %s: line %u: %s\n",
filename, lineno, msg);
panic("ath_hal_assert");
}
#endif /* AH_ASSERT */
#ifdef AH_DEBUG_ALQ
/*
* ALQ register tracing support.
*
* Setting hw.ath.hal.alq=1 enables tracing of all register reads and
* writes to the file /tmp/ath_hal.log. The file format is a simple
* fixed-size array of records. When done logging set hw.ath.hal.alq=0
* and then decode the file with the ardecode program (that is part of the
* HAL). If you start+stop tracing the data will be appended to an
* existing file.
*
* NB: doesn't handle multiple devices properly; only one DEVICE record
* is emitted and the different devices are not identified.
*/
#include "alq/alq.h"
#include "ah_decode.h"
static struct alq *ath_hal_alq;
static int ath_hal_alq_emitdev; /* need to emit DEVICE record */
static u_int ath_hal_alq_lost; /* count of lost records */
static const char *ath_hal_logfile = "/tmp/ath_hal.log";
static u_int ath_hal_alq_qsize = 8*1024;
static int
ath_hal_setlogging(int enable)
{
int error;
if (enable) {
if (!capable(CAP_NET_ADMIN))
return -EPERM;
error = alq_open(&ath_hal_alq, ath_hal_logfile,
sizeof (struct athregrec), ath_hal_alq_qsize);
ath_hal_alq_lost = 0;
ath_hal_alq_emitdev = 1;
printk("ath_hal: logging to %s %s\n", ath_hal_logfile,
error == 0 ? "enabled" : "could not be setup");
} else {
if (ath_hal_alq)
alq_close(ath_hal_alq);
ath_hal_alq = NULL;
printk("ath_hal: logging disabled\n");
error = 0;
}
return error;
}
/*
* Deal with the sysctl handler api changing.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8)
#define AH_SYSCTL_ARGS_DECL \
ctl_table *ctl, int write, struct file *filp, void *buffer, \
size_t *lenp
#define AH_SYSCTL_ARGS ctl, write, filp, buffer, lenp
#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,8) */
#define AH_SYSCTL_ARGS_DECL \
ctl_table *ctl, int write, struct file *filp, void *buffer,\
size_t *lenp, loff_t *ppos
#define AH_SYSCTL_ARGS ctl, write, filp, buffer, lenp, ppos
#endif
static int
sysctl_hw_ath_hal_log(AH_SYSCTL_ARGS_DECL)
{
int error, enable;
ctl->data = &enable;
ctl->maxlen = sizeof(enable);
enable = (ath_hal_alq != NULL);
error = proc_dointvec(AH_SYSCTL_ARGS);
if (error || !write)
return error;
else
return ath_hal_setlogging(enable);
}
static struct ale *
ath_hal_alq_get(struct ath_hal *ah)
{
struct ale *ale;
if (ath_hal_alq_emitdev) {
ale = alq_get(ath_hal_alq, ALQ_NOWAIT);
if (ale) {
struct athregrec *r =
(struct athregrec *) ale->ae_data;
r->op = OP_DEVICE;
r->reg = 0;
r->val = ah->ah_devid;
alq_post(ath_hal_alq, ale);
ath_hal_alq_emitdev = 0;
} else
ath_hal_alq_lost++;
}
ale = alq_get(ath_hal_alq, ALQ_NOWAIT);
if (!ale)
ath_hal_alq_lost++;
return ale;
}
void __ahdecl
ath_hal_reg_write(struct ath_hal *ah, u_int32_t reg, u_int32_t val)
{
if (ath_hal_alq) {
unsigned long flags;
struct ale *ale;
local_irq_save(flags);
ale = ath_hal_alq_get(ah);
if (ale) {
struct athregrec *r = (struct athregrec *) ale->ae_data;
r->op = OP_WRITE;
r->reg = reg;
r->val = val;
alq_post(ath_hal_alq, ale);
}
local_irq_restore(flags);
}
_OS_REG_WRITE(ah, reg, val);
}
EXPORT_SYMBOL(ath_hal_reg_write);
u_int32_t __ahdecl
ath_hal_reg_read(struct ath_hal *ah, u_int32_t reg)
{
u_int32_t val;
val = _OS_REG_READ(ah, reg);
if (ath_hal_alq) {
unsigned long flags;
struct ale *ale;
local_irq_save(flags);
ale = ath_hal_alq_get(ah);
if (ale) {
struct athregrec *r = (struct athregrec *) ale->ae_data;
r->op = OP_READ;
r->reg = reg;
r->val = val;
alq_post(ath_hal_alq, ale);
}
local_irq_restore(flags);
}
return val;
}
EXPORT_SYMBOL(ath_hal_reg_read);
void __ahdecl
OS_MARK(struct ath_hal *ah, u_int id, u_int32_t v)
{
if (ath_hal_alq) {
unsigned long flags;
struct ale *ale;
local_irq_save(flags);
ale = ath_hal_alq_get(ah);
if (ale) {
struct athregrec *r = (struct athregrec *) ale->ae_data;
r->op = OP_MARK;
r->reg = id;
r->val = v;
alq_post(ath_hal_alq, ale);
}
local_irq_restore(flags);
}
}
EXPORT_SYMBOL(OS_MARK);
#elif defined(AH_DEBUG) || defined(AH_REGOPS_FUNC)
/*
* Memory-mapped device register read/write. These are here
* as routines when debugging support is enabled and/or when
* explicitly configured to use function calls. The latter is
* for architectures that might need to do something before
* referencing memory (e.g. remap an i/o window).
*
* NB: see the comments in ah_osdep.h about byte-swapping register
* reads and writes to understand what's going on below.
*/
void __ahdecl
ath_hal_reg_write(struct ath_hal *ah, u_int reg, u_int32_t val)
{
#ifdef AH_DEBUG
if (ath_hal_debug > 1)
ath_hal_printf(ah, "WRITE 0x%x <= 0x%x\n", reg, val);
#endif
_OS_REG_WRITE(ah, reg, val);
}
EXPORT_SYMBOL(ath_hal_reg_write);
u_int32_t __ahdecl
ath_hal_reg_read(struct ath_hal *ah, u_int reg)
{
u_int32_t val;
val = _OS_REG_READ(ah, reg);
#ifdef AH_DEBUG
if (ath_hal_debug > 1)
ath_hal_printf(ah, "READ 0x%x => 0x%x\n", reg, val);
#endif
return val;
}
EXPORT_SYMBOL(ath_hal_reg_read);
#endif /* AH_DEBUG || AH_REGOPS_FUNC */
#ifdef AH_DEBUG
void __ahdecl
HALDEBUG(struct ath_hal *ah, const char* fmt, ...)
{
if (ath_hal_debug) {
__va_list ap;
va_start(ap, fmt);
ath_hal_vprintf(ah, fmt, ap);
va_end(ap);
}
}
void __ahdecl
HALDEBUGn(struct ath_hal *ah, u_int level, const char* fmt, ...)
{
if (ath_hal_debug >= level) {
__va_list ap;
va_start(ap, fmt);
ath_hal_vprintf(ah, fmt, ap);
va_end(ap);
}
}
#endif /* AH_DEBUG */
/*
* Delay n microseconds.
*/
void __ahdecl
ath_hal_delay(int n)
{
udelay(n);
}
u_int32_t __ahdecl
ath_hal_getuptime(struct ath_hal *ah)
{
return ((jiffies / HZ) * 1000) + (jiffies % HZ) * (1000 / HZ);
}
EXPORT_SYMBOL(ath_hal_getuptime);
/*
* Allocate/free memory.
*/
void * __ahdecl
ath_hal_malloc(size_t size)
{
void *p;
p = kmalloc(size, GFP_KERNEL);
if (p)
OS_MEMZERO(p, size);
return p;
}
void __ahdecl
ath_hal_free(void* p)
{
kfree(p);
}
void __ahdecl
ath_hal_memzero(void *dst, size_t n)
{
memset(dst, 0, n);
}
EXPORT_SYMBOL(ath_hal_memzero);
void * __ahdecl
ath_hal_memcpy(void *dst, const void *src, size_t n)
{
return memcpy(dst, src, n);
}
EXPORT_SYMBOL(ath_hal_memcpy);
int __ahdecl
ath_hal_memcmp(const void *a, const void *b, size_t n)
{
return memcmp(a, b, n);
}
EXPORT_SYMBOL(ath_hal_memcmp);
#ifdef CONFIG_SYSCTL
enum {
DEV_ATH = 9, /* XXX must match driver */
};
#define CTL_AUTO -2 /* cannot be CTL_ANY or CTL_NONE */
static ctl_table ath_hal_sysctls[] = {
#ifdef AH_DEBUG
{ .ctl_name = CTL_AUTO,
.procname = "debug",
.mode = 0644,
.data = &ath_hal_debug,
.maxlen = sizeof(ath_hal_debug),
.proc_handler = proc_dointvec
},
#endif
{ .ctl_name = CTL_AUTO,
.procname = "dma_beacon_response_time",
.data = &ath_hal_dma_beacon_response_time,
.maxlen = sizeof(ath_hal_dma_beacon_response_time),
.mode = 0644,
.proc_handler = proc_dointvec
},
{ .ctl_name = CTL_AUTO,
.procname = "sw_beacon_response_time",
.mode = 0644,
.data = &ath_hal_sw_beacon_response_time,
.maxlen = sizeof(ath_hal_sw_beacon_response_time),
.proc_handler = proc_dointvec
},
{ .ctl_name = CTL_AUTO,
.procname = "swba_backoff",
.mode = 0644,
.data = &ath_hal_additional_swba_backoff,
.maxlen = sizeof(ath_hal_additional_swba_backoff),
.proc_handler = proc_dointvec
},
#ifdef AH_DEBUG_ALQ
{ .ctl_name = CTL_AUTO,
.procname = "alq",
.mode = 0644,
.proc_handler = sysctl_hw_ath_hal_log
},
{ .ctl_name = CTL_AUTO,
.procname = "alq_size",
.mode = 0644,
.data = &ath_hal_alq_qsize,
.maxlen = sizeof(ath_hal_alq_qsize),
.proc_handler = proc_dointvec
},
{ .ctl_name = CTL_AUTO,
.procname = "alq_lost",
.mode = 0644,
.data = &ath_hal_alq_lost,
.maxlen = sizeof(ath_hal_alq_lost),
.proc_handler = proc_dointvec
},
#endif
{ 0 }
};
static ctl_table ath_hal_table[] = {
{ .ctl_name = CTL_AUTO,
.procname = "hal",
.mode = 0555,
.child = ath_hal_sysctls
}, { 0 }
};
static ctl_table ath_ath_table[] = {
{ .ctl_name = DEV_ATH,
.procname = "ath",
.mode = 0555,
.child = ath_hal_table
}, { 0 }
};
static ctl_table ath_root_table[] = {
{ .ctl_name = CTL_DEV,
.procname = "dev",
.mode = 0555,
.child = ath_ath_table
}, { 0 }
};
static struct ctl_table_header *ath_hal_sysctl_header;
void
ath_hal_sysctl_register(void)
{
static int initialized = 0;
if (!initialized) {
ath_hal_sysctl_header =
register_sysctl_table(ath_root_table, 1);
initialized = 1;
}
}
void
ath_hal_sysctl_unregister(void)
{
if (ath_hal_sysctl_header)
unregister_sysctl_table(ath_hal_sysctl_header);
}
#endif /* CONFIG_SYSCTL */
/*
* Module glue.
*/
#include "version.h"
static char *dev_info = "ath_hal";
MODULE_AUTHOR("Errno Consulting, Sam Leffler");
MODULE_DESCRIPTION("Atheros Hardware Access Layer (HAL)");
MODULE_SUPPORTED_DEVICE("Atheros WLAN devices");
#ifdef MODULE_VERSION
MODULE_VERSION(ATH_HAL_VERSION);
#endif
#ifdef MODULE_LICENSE
MODULE_LICENSE("Proprietary");
#endif
EXPORT_SYMBOL(ath_hal_probe);
EXPORT_SYMBOL(_ath_hal_attach);
EXPORT_SYMBOL(ath_hal_detach);
EXPORT_SYMBOL(ath_hal_init_channels);
EXPORT_SYMBOL(ath_hal_getwirelessmodes);
EXPORT_SYMBOL(ath_hal_computetxtime);
EXPORT_SYMBOL(ath_hal_mhz2ieee);
EXPORT_SYMBOL(ath_hal_process_noisefloor);
static int __init
init_ath_hal(void)
{
const char *sep;
int i;
printk(KERN_INFO "%s: %s (", dev_info, ath_hal_version);
sep = "";
for (i = 0; ath_hal_buildopts[i] != NULL; i++) {
printk("%s%s", sep, ath_hal_buildopts[i]);
sep = ", ";
}
printk(")\n");
#ifdef CONFIG_SYSCTL
ath_hal_sysctl_register();
#endif
return (0);
}
module_init(init_ath_hal);
static void __exit
exit_ath_hal(void)
{
#ifdef CONFIG_SYSCTL
ath_hal_sysctl_unregister();
#endif
printk(KERN_INFO "%s: driver unloaded\n", dev_info);
}
module_exit(exit_ath_hal);