/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* 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.
*
* $FreeBSD$
*/
#include "opt_ah.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/pcpu.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/conf.h>
#include <machine/stdarg.h>
#include <net/ethernet.h> /* XXX for ether_sprintf */
#include <dev/ath/ath_hal/ah.h>
#include <dev/ath/ath_hal/ah_debug.h>
/*
* WiSoC boards overload the bus tag with information about the
* board layout. We must extract the bus space tag from that
* indirect structure. For everyone else the tag is passed in
* directly.
* XXX cache indirect ref privately
*/
#ifdef AH_SUPPORT_AR5312
#define BUSTAG(ah) \
((bus_space_tag_t) ((struct ar531x_config *)((ah)->ah_st))->tag)
#else
#define BUSTAG(ah) ((ah)->ah_st)
#endif
/*
* This lock is used to seralise register access for chips which have
* problems w/ SMP CPUs issuing concurrent PCI transactions.
*
* XXX This is a global lock for now; it should be pushed to
* a per-device lock in some platform-independent fashion.
*/
struct mtx ah_regser_mtx;
MTX_SYSINIT(ah_regser, &ah_regser_mtx, "Atheros register access mutex",
MTX_SPIN);
extern void ath_hal_printf(struct ath_hal *, const char*, ...)
__printflike(2,3);
extern void ath_hal_vprintf(struct ath_hal *, const char*, __va_list)
__printflike(2, 0);
extern const char* ath_hal_ether_sprintf(const u_int8_t *mac);
extern void *ath_hal_malloc(size_t);
extern void ath_hal_free(void *);
#ifdef AH_ASSERT
extern void ath_hal_assert_failed(const char* filename,
int lineno, const char* msg);
#endif
#ifdef AH_DEBUG
extern void DO_HALDEBUG(struct ath_hal *ah, u_int mask, const char* fmt, ...);
#endif /* AH_DEBUG */
/* NB: put this here instead of the driver to avoid circular references */
SYSCTL_NODE(_hw, OID_AUTO, ath, CTLFLAG_RD, 0, "Atheros driver parameters");
static SYSCTL_NODE(_hw_ath, OID_AUTO, hal, CTLFLAG_RD, 0,
"Atheros HAL parameters");
#ifdef AH_DEBUG
int ath_hal_debug = 0;
SYSCTL_INT(_hw_ath_hal, OID_AUTO, debug, CTLFLAG_RWTUN, &ath_hal_debug,
0, "Atheros HAL debugging printfs");
#endif /* AH_DEBUG */
static MALLOC_DEFINE(M_ATH_HAL, "ath_hal", "ath hal data");
void*
ath_hal_malloc(size_t size)
{
return malloc(size, M_ATH_HAL, M_NOWAIT | M_ZERO);
}
void
ath_hal_free(void* p)
{
free(p, M_ATH_HAL);
}
void
ath_hal_vprintf(struct ath_hal *ah, const char* fmt, va_list ap)
{
vprintf(fmt, ap);
}
void
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);
}
const char*
ath_hal_ether_sprintf(const u_int8_t *mac)
{
return ether_sprintf(mac);
}
#ifdef AH_DEBUG
/*
* XXX This is highly relevant only for the AR5416 and later
* PCI/PCIe NICs. It'll need adjustment for other hardware
* variations.
*/
static int
ath_hal_reg_whilst_asleep(struct ath_hal *ah, uint32_t reg)
{
if (reg >= 0x4000 && reg < 0x5000)
return (1);
if (reg >= 0x6000 && reg < 0x7000)
return (1);
if (reg >= 0x7000 && reg < 0x8000)
return (1);
return (0);
}
void
DO_HALDEBUG(struct ath_hal *ah, u_int mask, const char* fmt, ...)
{
if ((mask == HAL_DEBUG_UNMASKABLE) ||
(ah != NULL && ah->ah_config.ah_debug & mask) ||
(ath_hal_debug & mask)) {
__va_list ap;
va_start(ap, fmt);
ath_hal_vprintf(ah, fmt, ap);
va_end(ap);
}
}
#undef HAL_DEBUG_UNMASKABLE
#endif /* AH_DEBUG */
#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 arcode 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 <sys/alq.h>
#include <sys/pcpu.h>
#include <dev/ath/ath_hal/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 char ath_hal_logfile[MAXPATHLEN] = "/tmp/ath_hal.log";
SYSCTL_STRING(_hw_ath_hal, OID_AUTO, alq_logfile, CTLFLAG_RW,
&ath_hal_logfile, sizeof(kernelname), "Name of ALQ logfile");
static u_int ath_hal_alq_qsize = 64*1024;
static int
ath_hal_setlogging(int enable)
{
int error;
if (enable) {
error = alq_open(&ath_hal_alq, ath_hal_logfile,
curthread->td_ucred, ALQ_DEFAULT_CMODE,
sizeof (struct athregrec), ath_hal_alq_qsize);
ath_hal_alq_lost = 0;
ath_hal_alq_emitdev = 1;
printf("ath_hal: logging to %s enabled\n",
ath_hal_logfile);
} else {
if (ath_hal_alq)
alq_close(ath_hal_alq);
ath_hal_alq = NULL;
printf("ath_hal: logging disabled\n");
error = 0;
}
return (error);
}
static int
sysctl_hw_ath_hal_log(SYSCTL_HANDLER_ARGS)
{
int error, enable;
enable = (ath_hal_alq != NULL);
error = sysctl_handle_int(oidp, &enable, 0, req);
if (error || !req->newptr)
return (error);
else
return (ath_hal_setlogging(enable));
}
SYSCTL_PROC(_hw_ath_hal, OID_AUTO, alq, CTLTYPE_INT|CTLFLAG_RW,
0, 0, sysctl_hw_ath_hal_log, "I", "Enable HAL register logging");
SYSCTL_INT(_hw_ath_hal, OID_AUTO, alq_size, CTLFLAG_RW,
&ath_hal_alq_qsize, 0, "In-memory log size (#records)");
SYSCTL_INT(_hw_ath_hal, OID_AUTO, alq_lost, CTLFLAG_RW,
&ath_hal_alq_lost, 0, "Register operations not logged");
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
ath_hal_reg_write(struct ath_hal *ah, u_int32_t reg, u_int32_t val)
{
bus_space_tag_t tag = BUSTAG(ah);
bus_space_handle_t h = ah->ah_sh;
#ifdef AH_DEBUG
/* Debug - complain if we haven't fully waken things up */
if (! ath_hal_reg_whilst_asleep(ah, reg) &&
ah->ah_powerMode != HAL_PM_AWAKE) {
ath_hal_printf(ah, "%s: reg=0x%08x, val=0x%08x, pm=%d\n",
__func__, reg, val, ah->ah_powerMode);
}
#endif
if (ath_hal_alq) {
struct ale *ale = ath_hal_alq_get(ah);
if (ale) {
struct athregrec *r = (struct athregrec *) ale->ae_data;
r->threadid = curthread->td_tid;
r->op = OP_WRITE;
r->reg = reg;
r->val = val;
alq_post(ath_hal_alq, ale);
}
}
if (ah->ah_config.ah_serialise_reg_war)
mtx_lock_spin(&ah_regser_mtx);
bus_space_write_4(tag, h, reg, val);
OS_BUS_BARRIER_REG(ah, reg, OS_BUS_BARRIER_WRITE);
if (ah->ah_config.ah_serialise_reg_war)
mtx_unlock_spin(&ah_regser_mtx);
}
u_int32_t
ath_hal_reg_read(struct ath_hal *ah, u_int32_t reg)
{
bus_space_tag_t tag = BUSTAG(ah);
bus_space_handle_t h = ah->ah_sh;
u_int32_t val;
#ifdef AH_DEBUG
/* Debug - complain if we haven't fully waken things up */
if (! ath_hal_reg_whilst_asleep(ah, reg) &&
ah->ah_powerMode != HAL_PM_AWAKE) {
ath_hal_printf(ah, "%s: reg=0x%08x, pm=%d\n",
__func__, reg, ah->ah_powerMode);
}
#endif
if (ah->ah_config.ah_serialise_reg_war)
mtx_lock_spin(&ah_regser_mtx);
OS_BUS_BARRIER_REG(ah, reg, OS_BUS_BARRIER_READ);
val = bus_space_read_4(tag, h, reg);
if (ah->ah_config.ah_serialise_reg_war)
mtx_unlock_spin(&ah_regser_mtx);
if (ath_hal_alq) {
struct ale *ale = ath_hal_alq_get(ah);
if (ale) {
struct athregrec *r = (struct athregrec *) ale->ae_data;
r->threadid = curthread->td_tid;
r->op = OP_READ;
r->reg = reg;
r->val = val;
alq_post(ath_hal_alq, ale);
}
}
return val;
}
void
OS_MARK(struct ath_hal *ah, u_int id, u_int32_t v)
{
if (ath_hal_alq) {
struct ale *ale = ath_hal_alq_get(ah);
if (ale) {
struct athregrec *r = (struct athregrec *) ale->ae_data;
r->threadid = curthread->td_tid;
r->op = OP_MARK;
r->reg = id;
r->val = v;
alq_post(ath_hal_alq, ale);
}
}
}
#else /* AH_DEBUG_ALQ */
/*
* 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
ath_hal_reg_write(struct ath_hal *ah, u_int32_t reg, u_int32_t val)
{
bus_space_tag_t tag = BUSTAG(ah);
bus_space_handle_t h = ah->ah_sh;
#ifdef AH_DEBUG
/* Debug - complain if we haven't fully waken things up */
if (! ath_hal_reg_whilst_asleep(ah, reg) &&
ah->ah_powerMode != HAL_PM_AWAKE) {
ath_hal_printf(ah, "%s: reg=0x%08x, val=0x%08x, pm=%d\n",
__func__, reg, val, ah->ah_powerMode);
}
#endif
if (ah->ah_config.ah_serialise_reg_war)
mtx_lock_spin(&ah_regser_mtx);
bus_space_write_4(tag, h, reg, val);
OS_BUS_BARRIER_REG(ah, reg, OS_BUS_BARRIER_WRITE);
if (ah->ah_config.ah_serialise_reg_war)
mtx_unlock_spin(&ah_regser_mtx);
}
u_int32_t
ath_hal_reg_read(struct ath_hal *ah, u_int32_t reg)
{
bus_space_tag_t tag = BUSTAG(ah);
bus_space_handle_t h = ah->ah_sh;
u_int32_t val;
#ifdef AH_DEBUG
/* Debug - complain if we haven't fully waken things up */
if (! ath_hal_reg_whilst_asleep(ah, reg) &&
ah->ah_powerMode != HAL_PM_AWAKE) {
ath_hal_printf(ah, "%s: reg=0x%08x, pm=%d\n",
__func__, reg, ah->ah_powerMode);
}
#endif
if (ah->ah_config.ah_serialise_reg_war)
mtx_lock_spin(&ah_regser_mtx);
OS_BUS_BARRIER_REG(ah, reg, OS_BUS_BARRIER_READ);
val = bus_space_read_4(tag, h, reg);
if (ah->ah_config.ah_serialise_reg_war)
mtx_unlock_spin(&ah_regser_mtx);
return val;
}
#endif /* AH_DEBUG_ALQ */
#ifdef AH_ASSERT
void
ath_hal_assert_failed(const char* filename, int lineno, const char *msg)
{
printf("Atheros HAL assertion failure: %s: line %u: %s\n",
filename, lineno, msg);
panic("ath_hal_assert");
}
#endif /* AH_ASSERT */
static int
ath_hal_modevent(module_t mod __unused, int type, void *data __unused)
{
int error = 0;
switch (type) {
case MOD_LOAD:
printf("[ath_hal] loaded\n");
break;
case MOD_UNLOAD:
printf("[ath_hal] unloaded\n");
break;
case MOD_SHUTDOWN:
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}
DEV_MODULE(ath_hal, ath_hal_modevent, NULL);
MODULE_VERSION(ath_hal, 1);
#if defined(AH_DEBUG_ALQ)
MODULE_DEPEND(ath_hal, alq, 1, 1, 1);
#endif
