I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. 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.
117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
/*
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* Copyright (c) 2013, 2014, 2015, 2016 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_BOOT);
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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_BOOT);
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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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PanicF("Failed to allocate ATA driver for AHCI device 0x%X", devaddr);
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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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