121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
/*
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* Copyright (c) 2013, 2014, 2015, 2016, 2018 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* disk/ahci/ahci.cpp
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* Driver for the Advanced Host Controller Interface.
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*/
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#include <errno.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <string.h>
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#include <time.h>
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#include <timespec.h>
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#include <sortix/kernel/clock.h>
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#include <sortix/kernel/descriptor.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/pci.h>
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#include <sortix/kernel/refcount.h>
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#include <sortix/kernel/time.h>
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#include "ahci.h"
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#include "hba.h"
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namespace Sortix {
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namespace AHCI {
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bool WaitClear(volatile little_uint32_t* reg,
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uint32_t bits,
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bool any,
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unsigned int msecs)
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{
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struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
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Clock* clock = Time::GetClock(CLOCK_BOOTTIME);
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struct timespec begun;
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clock->Get(&begun, NULL);
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while ( true )
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{
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struct timespec now;
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clock->Get(&now, NULL);
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uint32_t reg_snapshop = *reg;
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if ( !any && (reg_snapshop & bits) == 0 )
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return true;
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if ( any && (reg_snapshop & bits) != bits )
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return true;
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struct timespec elapsed = timespec_sub(now, begun);
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if ( timespec_le(timeout, elapsed) )
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return errno = ETIMEDOUT, false;
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kthread_yield();
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}
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}
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bool WaitSet(volatile little_uint32_t* reg,
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uint32_t bits,
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bool any,
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unsigned int msecs)
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{
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struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
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Clock* clock = Time::GetClock(CLOCK_BOOTTIME);
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struct timespec begun;
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clock->Get(&begun, NULL);
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while ( true )
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{
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struct timespec now;
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clock->Get(&now, NULL);
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uint32_t reg_snapshop = *reg;
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if ( !any && (reg_snapshop & bits) == bits )
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return true;
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if ( any && (reg_snapshop & bits) != 0 )
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return true;
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struct timespec elapsed = timespec_sub(now, begun);
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if ( timespec_le(timeout, elapsed) )
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return errno = ETIMEDOUT, false;
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kthread_yield();
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}
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}
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static void InitializeDevice(Ref<Descriptor> dev, const char* devpath,
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uint32_t devaddr)
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{
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HBA* hba = new HBA(devaddr);
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if ( !hba )
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{
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Log::PrintF("ahci: pci 0x%X: "
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"failed to allocate driver object", devaddr);
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return;
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}
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if ( !hba->Initialize(dev, devpath) )
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return delete hba;
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}
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void Init(const char* devpath, Ref<Descriptor> dev)
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{
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uint32_t devaddr;
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pcifind_t filter;
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memset(&filter, 255, sizeof(filter));
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filter.classid = 0x01;
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filter.subclassid = 0x06;
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devaddr = 0;
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while ( (devaddr = PCI::SearchForDevices(filter, devaddr)) )
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InitializeDevice(dev, devpath, devaddr);
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}
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} // namespace AHCI
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} // namespace Sortix
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