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/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/kmap_types.h>
#include <asm/atomic.h>
#include "include/osd.h"
/* Data types */
struct osd_callback_struct {
struct work_struct work;
void (*callback)(void *);
void *data;
};
void BitSet(unsigned int* addr, int bit)
{
set_bit(bit, (unsigned long*)addr);
}
int BitTest(unsigned int* addr, int bit)
{
return test_bit(bit, (unsigned long*)addr);
}
void BitClear(unsigned int* addr, int bit)
{
clear_bit(bit, (unsigned long*)addr);
}
int BitTestAndClear(unsigned int* addr, int bit)
{
return test_and_clear_bit(bit, (unsigned long*)addr);
}
int BitTestAndSet(unsigned int* addr, int bit)
{
return test_and_set_bit(bit, (unsigned long*)addr);
}
int InterlockedIncrement(int *val)
{
return atomic_inc_return((atomic_t*)val);
}
int InterlockedDecrement(int *val)
{
return atomic_dec_return((atomic_t*)val);
}
#ifndef atomic_cmpxchg
#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
#endif
int InterlockedCompareExchange(int *val, int new, int curr)
{
/* return ((int)cmpxchg(((atomic_t*)val), curr, new)); */
return atomic_cmpxchg((atomic_t*)val, curr, new);
}
void* VirtualAllocExec(unsigned int size)
{
#ifdef __x86_64__
return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL_EXEC);
#else
return __vmalloc(size, GFP_KERNEL, __pgprot(__PAGE_KERNEL & (~_PAGE_NX)));
#endif
}
void VirtualFree(void* VirtAddr)
{
return vfree(VirtAddr);
}
void* PageAlloc(unsigned int count)
{
void *p;
p = (void *)__get_free_pages(GFP_KERNEL, get_order(count * PAGE_SIZE));
if (p) memset(p, 0, count * PAGE_SIZE);
return p;
/* struct page* page = alloc_page(GFP_KERNEL|__GFP_ZERO); */
/* void *p; */
/* BUGBUG: We need to use kmap in case we are in HIMEM region */
/* p = page_address(page); */
/* if (p) memset(p, 0, PAGE_SIZE); */
/* return p; */
}
void PageFree(void* page, unsigned int count)
{
free_pages((unsigned long)page, get_order(count * PAGE_SIZE));
/*struct page* p = virt_to_page(page);
__free_page(p);*/
}
void* PageMapVirtualAddress(unsigned long Pfn)
{
return kmap_atomic(pfn_to_page(Pfn), KM_IRQ0);
}
void PageUnmapVirtualAddress(void* VirtAddr)
{
kunmap_atomic(VirtAddr, KM_IRQ0);
}
void *MemMapIO(unsigned long phys, unsigned long size)
{
return (void*)GetVirtualAddress(phys); /* return ioremap_nocache(phys, size); */
}
void MemUnmapIO(void *virt)
{
/* iounmap(virt); */
}
static void TimerCallback(unsigned long data)
{
struct osd_timer *t = (struct osd_timer *) data;
t->callback(t->context);
}
struct osd_timer *TimerCreate(PFN_TIMER_CALLBACK pfnTimerCB, void* context)
{
struct osd_timer *t = kmalloc(sizeof(struct osd_timer), GFP_KERNEL);
if (!t)
{
return NULL;
}
t->callback = pfnTimerCB;
t->context = context;
init_timer(&t->timer);
t->timer.data = (unsigned long)t;
t->timer.function = TimerCallback;
return t;
}
void TimerStart(struct osd_timer *t, u32 expirationInUs)
{
t->timer.expires = jiffies + usecs_to_jiffies(expirationInUs);
add_timer(&t->timer);
}
int TimerStop(struct osd_timer *t)
{
return del_timer(&t->timer);
}
void TimerClose(struct osd_timer *t)
{
del_timer(&t->timer);
kfree(t);
}
struct osd_waitevent *WaitEventCreate(void)
{
struct osd_waitevent *wait = kmalloc(sizeof(struct osd_waitevent), GFP_KERNEL);
if (!wait)
{
return NULL;
}
wait->condition = 0;
init_waitqueue_head(&wait->event);
return wait;
}
void WaitEventClose(struct osd_waitevent *waitEvent)
{
kfree(waitEvent);
}
void WaitEventSet(struct osd_waitevent *waitEvent)
{
waitEvent->condition = 1;
wake_up_interruptible(&waitEvent->event);
}
int WaitEventWait(struct osd_waitevent *waitEvent)
{
int ret=0;
ret = wait_event_interruptible(waitEvent->event,
waitEvent->condition);
waitEvent->condition = 0;
return ret;
}
int WaitEventWaitEx(struct osd_waitevent *waitEvent, u32 TimeoutInMs)
{
int ret=0;
ret = wait_event_interruptible_timeout(waitEvent->event,
waitEvent->condition,
msecs_to_jiffies(TimeoutInMs));
waitEvent->condition = 0;
return ret;
}
void* Physical2LogicalAddr(unsigned long PhysAddr)
{
void* logicalAddr = phys_to_virt(PhysAddr);
BUG_ON(!virt_addr_valid(logicalAddr));
return logicalAddr;
}
unsigned long Logical2PhysicalAddr(void * LogicalAddr)
{
BUG_ON(!virt_addr_valid(LogicalAddr));
return virt_to_phys(LogicalAddr);
}
unsigned long Virtual2Physical(void * VirtAddr)
{
unsigned long pfn = vmalloc_to_pfn(VirtAddr);
return pfn << PAGE_SHIFT;
}
static void osd_callback_work(struct work_struct *work)
{
struct osd_callback_struct *cb = container_of(work,
struct osd_callback_struct,
work);
(cb->callback)(cb->data);
kfree(cb);
}
int osd_schedule_callback(struct workqueue_struct *wq,
void (*func)(void *),
void *data)
{
struct osd_callback_struct *cb;
cb = kmalloc(sizeof(*cb), GFP_KERNEL);
if (!cb)
{
printk(KERN_ERR "unable to allocate memory in osd_schedule_callback");
return -1;
}
cb->callback = func;
cb->data = data;
INIT_WORK(&cb->work, osd_callback_work);
return queue_work(wq, &cb->work);
}
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