117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2013, 2014, 2015, 2016 Jonas 'Sortie' Termansen.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* disk/ahci/ahci.cpp
|
|
* Driver for the Advanced Host Controller Interface.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <timespec.h>
|
|
|
|
#include <sortix/kernel/clock.h>
|
|
#include <sortix/kernel/descriptor.h>
|
|
#include <sortix/kernel/kernel.h>
|
|
#include <sortix/kernel/pci.h>
|
|
#include <sortix/kernel/refcount.h>
|
|
#include <sortix/kernel/time.h>
|
|
|
|
#include "ahci.h"
|
|
#include "hba.h"
|
|
|
|
namespace Sortix {
|
|
namespace AHCI {
|
|
|
|
bool WaitClear(volatile little_uint32_t* reg,
|
|
uint32_t bits,
|
|
bool any,
|
|
unsigned int msecs)
|
|
{
|
|
struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
|
|
Clock* clock = Time::GetClock(CLOCK_BOOT);
|
|
struct timespec begun;
|
|
clock->Get(&begun, NULL);
|
|
while ( true )
|
|
{
|
|
struct timespec now;
|
|
clock->Get(&now, NULL);
|
|
uint32_t reg_snapshop = *reg;
|
|
if ( !any && (reg_snapshop & bits) == 0 )
|
|
return true;
|
|
if ( any && (reg_snapshop & bits) != bits )
|
|
return true;
|
|
struct timespec elapsed = timespec_sub(now, begun);
|
|
if ( timespec_le(timeout, elapsed) )
|
|
return errno = ETIMEDOUT, false;
|
|
kthread_yield();
|
|
}
|
|
}
|
|
|
|
bool WaitSet(volatile little_uint32_t* reg,
|
|
uint32_t bits,
|
|
bool any,
|
|
unsigned int msecs)
|
|
{
|
|
struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
|
|
Clock* clock = Time::GetClock(CLOCK_BOOT);
|
|
struct timespec begun;
|
|
clock->Get(&begun, NULL);
|
|
while ( true )
|
|
{
|
|
struct timespec now;
|
|
clock->Get(&now, NULL);
|
|
uint32_t reg_snapshop = *reg;
|
|
if ( !any && (reg_snapshop & bits) == bits )
|
|
return true;
|
|
if ( any && (reg_snapshop & bits) != 0 )
|
|
return true;
|
|
struct timespec elapsed = timespec_sub(now, begun);
|
|
if ( timespec_le(timeout, elapsed) )
|
|
return errno = ETIMEDOUT, false;
|
|
kthread_yield();
|
|
}
|
|
}
|
|
|
|
static void InitializeDevice(Ref<Descriptor> dev, const char* devpath,
|
|
uint32_t devaddr)
|
|
{
|
|
HBA* hba = new HBA(devaddr);
|
|
if ( !hba )
|
|
PanicF("Failed to allocate ATA driver for AHCI device 0x%X", devaddr);
|
|
|
|
if ( !hba->Initialize(dev, devpath) )
|
|
return delete hba;
|
|
}
|
|
|
|
void Init(const char* devpath, Ref<Descriptor> dev)
|
|
{
|
|
uint32_t devaddr;
|
|
pcifind_t filter;
|
|
|
|
memset(&filter, 255, sizeof(filter));
|
|
filter.classid = 0x01;
|
|
filter.subclassid = 0x06;
|
|
|
|
devaddr = 0;
|
|
while ( (devaddr = PCI::SearchForDevices(filter, devaddr)) )
|
|
InitializeDevice(dev, devpath, devaddr);
|
|
}
|
|
|
|
} // namespace AHCI
|
|
} // namespace Sortix
|