/
mm.c
2713 lines (2234 loc) · 77 KB
/
mm.c
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/**********************************************************************
*
* Copyright (C) Imagination Technologies Ltd. All rights reserved.
*
* 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, except
* as otherwise stated in writing, 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.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* Imagination Technologies Ltd. <gpl-support@imgtec.com>
* Home Park Estate, Kings Langley, Herts, WD4 8LZ, UK
*
******************************************************************************/
#include <linux/version.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38))
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#endif
#if !defined(PVR_LINUX_MEM_AREA_POOL_MAX_PAGES)
#define PVR_LINUX_MEM_AREA_POOL_MAX_PAGES 0
#endif
#include <linux/kernel.h>
#include <asm/atomic.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <asm/io.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
#include <linux/wrapper.h>
#endif
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/sched.h>
#if defined(PVR_LINUX_MEM_AREA_POOL_ALLOW_SHRINK)
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
#include <linux/shrinker.h>
#endif
#endif
#include "img_defs.h"
#include "services.h"
#include "servicesint.h"
#include "syscommon.h"
#include "mutils.h"
#include "mm.h"
#include "pvrmmap.h"
#include "mmap.h"
#include "osfunc.h"
#include "pvr_debug.h"
#include "proc.h"
#include "mutex.h"
#include "lock.h"
#if defined(DEBUG_LINUX_MEM_AREAS) || defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
#include "lists.h"
#endif
static atomic_t g_sPagePoolEntryCount = ATOMIC_INIT(0);
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
typedef enum {
DEBUG_MEM_ALLOC_TYPE_KMALLOC,
DEBUG_MEM_ALLOC_TYPE_VMALLOC,
DEBUG_MEM_ALLOC_TYPE_ALLOC_PAGES,
DEBUG_MEM_ALLOC_TYPE_IOREMAP,
DEBUG_MEM_ALLOC_TYPE_IO,
DEBUG_MEM_ALLOC_TYPE_KMEM_CACHE,
DEBUG_MEM_ALLOC_TYPE_ION,
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
DEBUG_MEM_ALLOC_TYPE_VMAP,
#endif
DEBUG_MEM_ALLOC_TYPE_COUNT
} DEBUG_MEM_ALLOC_TYPE;
typedef struct _DEBUG_MEM_ALLOC_REC
{
DEBUG_MEM_ALLOC_TYPE eAllocType;
IMG_VOID *pvKey;
IMG_VOID *pvCpuVAddr;
IMG_UINT32 ulCpuPAddr;
IMG_VOID *pvPrivateData;
IMG_UINT32 ui32Bytes;
pid_t pid;
IMG_CHAR *pszFileName;
IMG_UINT32 ui32Line;
struct _DEBUG_MEM_ALLOC_REC *psNext;
struct _DEBUG_MEM_ALLOC_REC **ppsThis;
} DEBUG_MEM_ALLOC_REC;
static IMPLEMENT_LIST_ANY_VA_2(DEBUG_MEM_ALLOC_REC, IMG_BOOL, IMG_FALSE)
static IMPLEMENT_LIST_ANY_VA(DEBUG_MEM_ALLOC_REC)
static IMPLEMENT_LIST_FOR_EACH(DEBUG_MEM_ALLOC_REC)
static IMPLEMENT_LIST_INSERT(DEBUG_MEM_ALLOC_REC)
static IMPLEMENT_LIST_REMOVE(DEBUG_MEM_ALLOC_REC)
static DEBUG_MEM_ALLOC_REC *g_MemoryRecords;
static IMG_UINT32 g_WaterMarkData[DEBUG_MEM_ALLOC_TYPE_COUNT];
static IMG_UINT32 g_HighWaterMarkData[DEBUG_MEM_ALLOC_TYPE_COUNT];
static IMG_UINT32 g_SysRAMWaterMark;
static IMG_UINT32 g_SysRAMHighWaterMark;
static inline IMG_UINT32
SysRAMTrueWaterMark(void)
{
return g_SysRAMWaterMark + PAGES_TO_BYTES(atomic_read(&g_sPagePoolEntryCount));
}
static IMG_UINT32 g_IOMemWaterMark;
static IMG_UINT32 g_IOMemHighWaterMark;
static IMG_VOID DebugMemAllocRecordAdd(DEBUG_MEM_ALLOC_TYPE eAllocType,
IMG_VOID *pvKey,
IMG_VOID *pvCpuVAddr,
IMG_UINT32 ulCpuPAddr,
IMG_VOID *pvPrivateData,
IMG_UINT32 ui32Bytes,
IMG_CHAR *pszFileName,
IMG_UINT32 ui32Line);
static IMG_VOID DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE eAllocType, IMG_VOID *pvKey, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line);
static IMG_CHAR *DebugMemAllocRecordTypeToString(DEBUG_MEM_ALLOC_TYPE eAllocType);
static struct proc_dir_entry *g_SeqFileMemoryRecords;
static void* ProcSeqNextMemoryRecords(struct seq_file *sfile,void* el,loff_t off);
static void ProcSeqShowMemoryRecords(struct seq_file *sfile,void* el);
static void* ProcSeqOff2ElementMemoryRecords(struct seq_file * sfile, loff_t off);
#endif
#if defined(DEBUG_LINUX_MEM_AREAS)
typedef struct _DEBUG_LINUX_MEM_AREA_REC
{
LinuxMemArea *psLinuxMemArea;
IMG_UINT32 ui32Flags;
pid_t pid;
struct _DEBUG_LINUX_MEM_AREA_REC *psNext;
struct _DEBUG_LINUX_MEM_AREA_REC **ppsThis;
}DEBUG_LINUX_MEM_AREA_REC;
static IMPLEMENT_LIST_ANY_VA(DEBUG_LINUX_MEM_AREA_REC)
static IMPLEMENT_LIST_FOR_EACH(DEBUG_LINUX_MEM_AREA_REC)
static IMPLEMENT_LIST_INSERT(DEBUG_LINUX_MEM_AREA_REC)
static IMPLEMENT_LIST_REMOVE(DEBUG_LINUX_MEM_AREA_REC)
static DEBUG_LINUX_MEM_AREA_REC *g_LinuxMemAreaRecords;
static IMG_UINT32 g_LinuxMemAreaCount;
static IMG_UINT32 g_LinuxMemAreaWaterMark;
static IMG_UINT32 g_LinuxMemAreaHighWaterMark;
static struct proc_dir_entry *g_SeqFileMemArea;
static void* ProcSeqNextMemArea(struct seq_file *sfile,void* el,loff_t off);
static void ProcSeqShowMemArea(struct seq_file *sfile,void* el);
static void* ProcSeqOff2ElementMemArea(struct seq_file *sfile, loff_t off);
#endif
#if defined(DEBUG_LINUX_MEM_AREAS) || defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
static PVRSRV_LINUX_MUTEX g_sDebugMutex;
#endif
#if (defined(DEBUG_LINUX_MEM_AREAS) || defined(DEBUG_LINUX_MEMORY_ALLOCATIONS))
static void ProcSeqStartstopDebugMutex(struct seq_file *sfile,IMG_BOOL start);
#endif
typedef struct
{
struct list_head sPagePoolItem;
struct page *psPage;
} LinuxPagePoolEntry;
static LinuxKMemCache *g_PsLinuxMemAreaCache;
static LinuxKMemCache *g_PsLinuxPagePoolCache;
static LIST_HEAD(g_sPagePoolList);
static int g_iPagePoolMaxEntries;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
static IMG_VOID ReservePages(IMG_VOID *pvAddress, IMG_UINT32 ui32Length);
static IMG_VOID UnreservePages(IMG_VOID *pvAddress, IMG_UINT32 ui32Length);
#endif
static LinuxMemArea *LinuxMemAreaStructAlloc(IMG_VOID);
static IMG_VOID LinuxMemAreaStructFree(LinuxMemArea *psLinuxMemArea);
#if defined(DEBUG_LINUX_MEM_AREAS)
static IMG_VOID DebugLinuxMemAreaRecordAdd(LinuxMemArea *psLinuxMemArea, IMG_UINT32 ui32Flags);
static DEBUG_LINUX_MEM_AREA_REC *DebugLinuxMemAreaRecordFind(LinuxMemArea *psLinuxMemArea);
static IMG_VOID DebugLinuxMemAreaRecordRemove(LinuxMemArea *psLinuxMemArea);
#endif
static inline IMG_BOOL
AreaIsUncached(IMG_UINT32 ui32AreaFlags)
{
return (ui32AreaFlags & (PVRSRV_HAP_WRITECOMBINE | PVRSRV_HAP_UNCACHED)) != 0;
}
static inline IMG_BOOL
CanFreeToPool(LinuxMemArea *psLinuxMemArea)
{
return AreaIsUncached(psLinuxMemArea->ui32AreaFlags) && !psLinuxMemArea->bNeedsCacheInvalidate;
}
IMG_VOID *
_KMallocWrapper(IMG_UINT32 ui32ByteSize, gfp_t uFlags, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
IMG_VOID *pvRet;
pvRet = kmalloc(ui32ByteSize, uFlags);
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
if (pvRet)
{
DebugMemAllocRecordAdd(DEBUG_MEM_ALLOC_TYPE_KMALLOC,
pvRet,
pvRet,
0,
NULL,
ui32ByteSize,
pszFileName,
ui32Line
);
}
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
return pvRet;
}
IMG_VOID
_KFreeWrapper(IMG_VOID *pvCpuVAddr, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE_KMALLOC, pvCpuVAddr, pszFileName, ui32Line);
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
kfree(pvCpuVAddr);
}
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
static IMG_VOID
DebugMemAllocRecordAdd(DEBUG_MEM_ALLOC_TYPE eAllocType,
IMG_VOID *pvKey,
IMG_VOID *pvCpuVAddr,
IMG_UINT32 ulCpuPAddr,
IMG_VOID *pvPrivateData,
IMG_UINT32 ui32Bytes,
IMG_CHAR *pszFileName,
IMG_UINT32 ui32Line)
{
DEBUG_MEM_ALLOC_REC *psRecord;
LinuxLockMutex(&g_sDebugMutex);
psRecord = kmalloc(sizeof(DEBUG_MEM_ALLOC_REC), GFP_KERNEL);
psRecord->eAllocType = eAllocType;
psRecord->pvKey = pvKey;
psRecord->pvCpuVAddr = pvCpuVAddr;
psRecord->ulCpuPAddr = ulCpuPAddr;
psRecord->pvPrivateData = pvPrivateData;
psRecord->pid = OSGetCurrentProcessIDKM();
psRecord->ui32Bytes = ui32Bytes;
psRecord->pszFileName = pszFileName;
psRecord->ui32Line = ui32Line;
List_DEBUG_MEM_ALLOC_REC_Insert(&g_MemoryRecords, psRecord);
g_WaterMarkData[eAllocType] += ui32Bytes;
if (g_WaterMarkData[eAllocType] > g_HighWaterMarkData[eAllocType])
{
g_HighWaterMarkData[eAllocType] = g_WaterMarkData[eAllocType];
}
if (eAllocType == DEBUG_MEM_ALLOC_TYPE_KMALLOC
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_VMALLOC
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_ALLOC_PAGES
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_KMEM_CACHE)
{
IMG_UINT32 ui32SysRAMTrueWaterMark;
g_SysRAMWaterMark += ui32Bytes;
ui32SysRAMTrueWaterMark = SysRAMTrueWaterMark();
if (ui32SysRAMTrueWaterMark > g_SysRAMHighWaterMark)
{
g_SysRAMHighWaterMark = ui32SysRAMTrueWaterMark;
}
}
else if (eAllocType == DEBUG_MEM_ALLOC_TYPE_IOREMAP
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_IO)
{
g_IOMemWaterMark += ui32Bytes;
if (g_IOMemWaterMark > g_IOMemHighWaterMark)
{
g_IOMemHighWaterMark = g_IOMemWaterMark;
}
}
LinuxUnLockMutex(&g_sDebugMutex);
}
static IMG_BOOL DebugMemAllocRecordRemove_AnyVaCb(DEBUG_MEM_ALLOC_REC *psCurrentRecord, va_list va)
{
DEBUG_MEM_ALLOC_TYPE eAllocType;
IMG_VOID *pvKey;
eAllocType = va_arg(va, DEBUG_MEM_ALLOC_TYPE);
pvKey = va_arg(va, IMG_VOID*);
if (psCurrentRecord->eAllocType == eAllocType
&& psCurrentRecord->pvKey == pvKey)
{
eAllocType = psCurrentRecord->eAllocType;
g_WaterMarkData[eAllocType] -= psCurrentRecord->ui32Bytes;
if (eAllocType == DEBUG_MEM_ALLOC_TYPE_KMALLOC
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_VMALLOC
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_ALLOC_PAGES
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_KMEM_CACHE)
{
g_SysRAMWaterMark -= psCurrentRecord->ui32Bytes;
}
else if (eAllocType == DEBUG_MEM_ALLOC_TYPE_IOREMAP
|| eAllocType == DEBUG_MEM_ALLOC_TYPE_IO)
{
g_IOMemWaterMark -= psCurrentRecord->ui32Bytes;
}
List_DEBUG_MEM_ALLOC_REC_Remove(psCurrentRecord);
kfree(psCurrentRecord);
return IMG_TRUE;
}
else
{
return IMG_FALSE;
}
}
static IMG_VOID
DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE eAllocType, IMG_VOID *pvKey, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
LinuxLockMutex(&g_sDebugMutex);
if (!List_DEBUG_MEM_ALLOC_REC_IMG_BOOL_Any_va(g_MemoryRecords,
DebugMemAllocRecordRemove_AnyVaCb,
eAllocType,
pvKey))
{
PVR_DPF((PVR_DBG_ERROR, "%s: couldn't find an entry for type=%s with pvKey=%p (called from %s, line %d\n",
__FUNCTION__, DebugMemAllocRecordTypeToString(eAllocType), pvKey,
pszFileName, ui32Line));
}
LinuxUnLockMutex(&g_sDebugMutex);
}
static IMG_CHAR *
DebugMemAllocRecordTypeToString(DEBUG_MEM_ALLOC_TYPE eAllocType)
{
IMG_CHAR *apszDebugMemoryRecordTypes[] = {
"KMALLOC",
"VMALLOC",
"ALLOC_PAGES",
"IOREMAP",
"IO",
"KMEM_CACHE_ALLOC",
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
"VMAP"
#endif
};
return apszDebugMemoryRecordTypes[eAllocType];
}
#endif
static IMG_BOOL
AllocFlagsToPGProt(pgprot_t *pPGProtFlags, IMG_UINT32 ui32AllocFlags)
{
pgprot_t PGProtFlags;
switch (ui32AllocFlags & PVRSRV_HAP_CACHETYPE_MASK)
{
case PVRSRV_HAP_CACHED:
PGProtFlags = PAGE_KERNEL;
break;
case PVRSRV_HAP_WRITECOMBINE:
PGProtFlags = PGPROT_WC(PAGE_KERNEL);
break;
case PVRSRV_HAP_UNCACHED:
PGProtFlags = PGPROT_UC(PAGE_KERNEL);
break;
default:
PVR_DPF((PVR_DBG_ERROR,
"%s: Unknown mapping flags=0x%08x",
__FUNCTION__, ui32AllocFlags));
dump_stack();
return IMG_FALSE;
}
*pPGProtFlags = PGProtFlags;
return IMG_TRUE;
}
IMG_VOID *
_VMallocWrapper(IMG_UINT32 ui32Bytes,
IMG_UINT32 ui32AllocFlags,
IMG_CHAR *pszFileName,
IMG_UINT32 ui32Line)
{
pgprot_t PGProtFlags;
IMG_VOID *pvRet;
if (!AllocFlagsToPGProt(&PGProtFlags, ui32AllocFlags))
{
return NULL;
}
pvRet = __vmalloc(ui32Bytes, GFP_KERNEL | __GFP_HIGHMEM, PGProtFlags);
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
if (pvRet)
{
DebugMemAllocRecordAdd(DEBUG_MEM_ALLOC_TYPE_VMALLOC,
pvRet,
pvRet,
0,
NULL,
PAGE_ALIGN(ui32Bytes),
pszFileName,
ui32Line
);
}
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
return pvRet;
}
IMG_VOID
_VFreeWrapper(IMG_VOID *pvCpuVAddr, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE_VMALLOC, pvCpuVAddr, pszFileName, ui32Line);
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
vfree(pvCpuVAddr);
}
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
static IMG_VOID *
_VMapWrapper(struct page **ppsPageList, IMG_UINT32 ui32NumPages, IMG_UINT32 ui32AllocFlags, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
pgprot_t PGProtFlags;
IMG_VOID *pvRet;
if (!AllocFlagsToPGProt(&PGProtFlags, ui32AllocFlags))
{
return NULL;
}
pvRet = vmap(ppsPageList, ui32NumPages, GFP_KERNEL | __GFP_HIGHMEM, PGProtFlags);
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
if (pvRet)
{
DebugMemAllocRecordAdd(DEBUG_MEM_ALLOC_TYPE_VMAP,
pvRet,
pvRet,
0,
NULL,
PAGES_TO_BYTES(ui32NumPages),
pszFileName,
ui32Line
);
}
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
return pvRet;
}
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
#define VMapWrapper(ppsPageList, ui32Bytes, ui32AllocFlags) _VMapWrapper(ppsPageList, ui32Bytes, ui32AllocFlags, __FILE__, __LINE__)
#else
#define VMapWrapper(ppsPageList, ui32Bytes, ui32AllocFlags) _VMapWrapper(ppsPageList, ui32Bytes, ui32AllocFlags, NULL, 0)
#endif
static IMG_VOID
_VUnmapWrapper(IMG_VOID *pvCpuVAddr, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE_VMAP, pvCpuVAddr, pszFileName, ui32Line);
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
vunmap(pvCpuVAddr);
}
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
#define VUnmapWrapper(pvCpuVAddr) _VUnmapWrapper(pvCpuVAddr, __FILE__, __LINE__)
#else
#define VUnmapWrapper(pvCpuVAddr) _VUnmapWrapper(pvCpuVAddr, NULL, 0)
#endif
#endif
IMG_VOID
_KMemCacheFreeWrapper(LinuxKMemCache *psCache, IMG_VOID *pvObject, IMG_CHAR *pszFileName, IMG_UINT32 ui32Line)
{
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE_KMEM_CACHE, pvObject, pszFileName, ui32Line);
#else
PVR_UNREFERENCED_PARAMETER(pszFileName);
PVR_UNREFERENCED_PARAMETER(ui32Line);
#endif
kmem_cache_free(psCache, pvObject);
}
const IMG_CHAR *
KMemCacheNameWrapper(LinuxKMemCache *psCache)
{
PVR_UNREFERENCED_PARAMETER(psCache);
return "";
}
static LinuxPagePoolEntry *
LinuxPagePoolEntryAlloc(IMG_VOID)
{
return KMemCacheAllocWrapper(g_PsLinuxPagePoolCache, GFP_KERNEL);
}
static IMG_VOID
LinuxPagePoolEntryFree(LinuxPagePoolEntry *psPagePoolEntry)
{
KMemCacheFreeWrapper(g_PsLinuxPagePoolCache, psPagePoolEntry);
}
static struct page *
AllocPageFromLinux(void)
{
struct page *psPage;
psPage = alloc_pages(GFP_KERNEL | __GFP_HIGHMEM, 0);
if (!psPage)
{
return NULL;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0))
SetPageReserved(psPage);
#else
mem_map_reserve(psPage);
#endif
#endif
return psPage;
}
static IMG_VOID
FreePageToLinux(struct page *psPage)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0))
ClearPageReserved(psPage);
#else
mem_map_reserve(psPage);
#endif
#endif
__free_pages(psPage, 0);
}
#if (PVR_LINUX_MEM_AREA_POOL_MAX_PAGES != 0)
static DEFINE_MUTEX(g_sPagePoolMutex);
static inline void
PagePoolLock(void)
{
mutex_lock(&g_sPagePoolMutex);
}
static inline void
PagePoolUnlock(void)
{
mutex_unlock(&g_sPagePoolMutex);
}
static inline int
PagePoolTrylock(void)
{
return mutex_trylock(&g_sPagePoolMutex);
}
#else
static inline void
PagePoolLock(void)
{
}
static inline void
PagePoolUnlock(void)
{
}
static inline int
PagePoolTrylock(void)
{
return 1;
}
#endif
static inline void
AddEntryToPool(LinuxPagePoolEntry *psPagePoolEntry)
{
list_add_tail(&psPagePoolEntry->sPagePoolItem, &g_sPagePoolList);
atomic_inc(&g_sPagePoolEntryCount);
}
static inline void
RemoveEntryFromPool(LinuxPagePoolEntry *psPagePoolEntry)
{
list_del(&psPagePoolEntry->sPagePoolItem);
atomic_dec(&g_sPagePoolEntryCount);
}
static inline LinuxPagePoolEntry *
RemoveFirstEntryFromPool(void)
{
LinuxPagePoolEntry *psPagePoolEntry;
if (list_empty(&g_sPagePoolList))
{
PVR_ASSERT(atomic_read(&g_sPagePoolEntryCount) == 0);
return NULL;
}
PVR_ASSERT(atomic_read(&g_sPagePoolEntryCount) > 0);
psPagePoolEntry = list_first_entry(&g_sPagePoolList, LinuxPagePoolEntry, sPagePoolItem);
RemoveEntryFromPool(psPagePoolEntry);
return psPagePoolEntry;
}
static struct page *
AllocPage(IMG_UINT32 ui32AreaFlags, IMG_BOOL *pbFromPagePool)
{
struct page *psPage = NULL;
if (AreaIsUncached(ui32AreaFlags) && atomic_read(&g_sPagePoolEntryCount) != 0)
{
LinuxPagePoolEntry *psPagePoolEntry;
PagePoolLock();
psPagePoolEntry = RemoveFirstEntryFromPool();
PagePoolUnlock();
if (psPagePoolEntry)
{
psPage = psPagePoolEntry->psPage;
LinuxPagePoolEntryFree(psPagePoolEntry);
*pbFromPagePool = IMG_TRUE;
}
}
if (!psPage)
{
psPage = AllocPageFromLinux();
if (psPage)
{
*pbFromPagePool = IMG_FALSE;
}
}
return psPage;
}
static IMG_VOID
FreePage(IMG_BOOL bToPagePool, struct page *psPage)
{
if (bToPagePool && atomic_read(&g_sPagePoolEntryCount) < g_iPagePoolMaxEntries)
{
LinuxPagePoolEntry *psPagePoolEntry = LinuxPagePoolEntryAlloc();
if (psPagePoolEntry)
{
psPagePoolEntry->psPage = psPage;
PagePoolLock();
AddEntryToPool(psPagePoolEntry);
PagePoolUnlock();
return;
}
}
FreePageToLinux(psPage);
}
static IMG_VOID
FreePagePool(IMG_VOID)
{
LinuxPagePoolEntry *psPagePoolEntry, *psTempPoolEntry;
PagePoolLock();
#if (PVR_LINUX_MEM_AREA_POOL_MAX_PAGES != 0)
PVR_TRACE(("%s: Freeing %d pages from pool", __FUNCTION__, atomic_read(&g_sPagePoolEntryCount)));
#else
PVR_ASSERT(atomic_read(&g_sPagePoolEntryCount) == 0);
PVR_ASSERT(list_empty(&g_sPagePoolList));
#endif
list_for_each_entry_safe(psPagePoolEntry, psTempPoolEntry, &g_sPagePoolList, sPagePoolItem)
{
RemoveEntryFromPool(psPagePoolEntry);
FreePageToLinux(psPagePoolEntry->psPage);
LinuxPagePoolEntryFree(psPagePoolEntry);
}
PVR_ASSERT(atomic_read(&g_sPagePoolEntryCount) == 0);
PagePoolUnlock();
}
#if defined(PVR_LINUX_MEM_AREA_POOL_ALLOW_SHRINK)
#if defined(PVRSRV_NEED_PVR_ASSERT)
static struct shrinker g_sShrinker;
#endif
static int
ShrinkPagePool(struct shrinker *psShrinker, struct shrink_control *psShrinkControl)
{
unsigned long uNumToScan = psShrinkControl->nr_to_scan;
PVR_ASSERT(psShrinker == &g_sShrinker);
(void)psShrinker;
if (uNumToScan != 0)
{
LinuxPagePoolEntry *psPagePoolEntry, *psTempPoolEntry;
PVR_TRACE(("%s: Number to scan: %ld", __FUNCTION__, uNumToScan));
PVR_TRACE(("%s: Pages in pool before scan: %d", __FUNCTION__, atomic_read(&g_sPagePoolEntryCount)));
if (!PagePoolTrylock())
{
PVR_TRACE(("%s: Couldn't get page pool lock", __FUNCTION__));
return -1;
}
list_for_each_entry_safe(psPagePoolEntry, psTempPoolEntry, &g_sPagePoolList, sPagePoolItem)
{
RemoveEntryFromPool(psPagePoolEntry);
FreePageToLinux(psPagePoolEntry->psPage);
LinuxPagePoolEntryFree(psPagePoolEntry);
if (--uNumToScan == 0)
{
break;
}
}
if (list_empty(&g_sPagePoolList))
{
PVR_ASSERT(atomic_read(&g_sPagePoolEntryCount) == 0);
}
PagePoolUnlock();
PVR_TRACE(("%s: Pages in pool after scan: %d", __FUNCTION__, atomic_read(&g_sPagePoolEntryCount)));
}
return atomic_read(&g_sPagePoolEntryCount);
}
#endif
static IMG_BOOL
AllocPages(IMG_UINT32 ui32AreaFlags, struct page ***pppsPageList, IMG_HANDLE *phBlockPageList, IMG_UINT32 ui32NumPages, IMG_BOOL *pbFromPagePool)
{
struct page **ppsPageList;
IMG_HANDLE hBlockPageList;
IMG_INT32 i;
PVRSRV_ERROR eError;
IMG_BOOL bFromPagePool = IMG_FALSE;
eError = OSAllocMem(0, sizeof(*ppsPageList) * ui32NumPages, (IMG_VOID **)&ppsPageList, &hBlockPageList,
"Array of pages");
if (eError != PVRSRV_OK)
{
goto failed_page_list_alloc;
}
*pbFromPagePool = IMG_TRUE;
for(i = 0; i < (IMG_INT32)ui32NumPages; i++)
{
ppsPageList[i] = AllocPage(ui32AreaFlags, &bFromPagePool);
if (!ppsPageList[i])
{
goto failed_alloc_pages;
}
*pbFromPagePool &= bFromPagePool;
}
*pppsPageList = ppsPageList;
*phBlockPageList = hBlockPageList;
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
DebugMemAllocRecordAdd(DEBUG_MEM_ALLOC_TYPE_ALLOC_PAGES,
ppsPageList,
0,
0,
NULL,
PAGES_TO_BYTES(ui32NumPages),
"unknown",
0
);
#endif
return IMG_TRUE;
failed_alloc_pages:
for(i--; i >= 0; i--)
{
FreePage(*pbFromPagePool, ppsPageList[i]);
}
(IMG_VOID) OSFreeMem(0, sizeof(*ppsPageList) * ui32NumPages, ppsPageList, hBlockPageList);
failed_page_list_alloc:
return IMG_FALSE;
}
static IMG_VOID
FreePages(IMG_BOOL bToPagePool, struct page **ppsPageList, IMG_HANDLE hBlockPageList, IMG_UINT32 ui32NumPages)
{
IMG_INT32 i;
for(i = 0; i < (IMG_INT32)ui32NumPages; i++)
{
FreePage(bToPagePool, ppsPageList[i]);
}
#if defined(DEBUG_LINUX_MEMORY_ALLOCATIONS)
DebugMemAllocRecordRemove(DEBUG_MEM_ALLOC_TYPE_ALLOC_PAGES, ppsPageList, __FILE__, __LINE__);
#endif
(IMG_VOID) OSFreeMem(0, sizeof(*ppsPageList) * ui32NumPages, ppsPageList, hBlockPageList);
}
LinuxMemArea *
NewVMallocLinuxMemArea(IMG_UINT32 ui32Bytes, IMG_UINT32 ui32AreaFlags)
{
LinuxMemArea *psLinuxMemArea = NULL;
IMG_VOID *pvCpuVAddr;
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
IMG_UINT32 ui32NumPages = 0;
struct page **ppsPageList = NULL;
IMG_HANDLE hBlockPageList;
#endif
IMG_BOOL bFromPagePool = IMG_FALSE;
psLinuxMemArea = LinuxMemAreaStructAlloc();
if (!psLinuxMemArea)
{
goto failed;
}
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
ui32NumPages = RANGE_TO_PAGES(ui32Bytes);
if (!AllocPages(ui32AreaFlags, &ppsPageList, &hBlockPageList, ui32NumPages, &bFromPagePool))
{
goto failed;
}
pvCpuVAddr = VMapWrapper(ppsPageList, ui32NumPages, ui32AreaFlags);
#else
pvCpuVAddr = VMallocWrapper(ui32Bytes, ui32AreaFlags);
if (!pvCpuVAddr)
{
goto failed;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
ReservePages(pvCpuVAddr, ui32Bytes);
#endif
#endif
psLinuxMemArea->eAreaType = LINUX_MEM_AREA_VMALLOC;
psLinuxMemArea->uData.sVmalloc.pvVmallocAddress = pvCpuVAddr;
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
psLinuxMemArea->uData.sVmalloc.ppsPageList = ppsPageList;
psLinuxMemArea->uData.sVmalloc.hBlockPageList = hBlockPageList;
#endif
psLinuxMemArea->ui32ByteSize = ui32Bytes;
psLinuxMemArea->ui32AreaFlags = ui32AreaFlags;
INIT_LIST_HEAD(&psLinuxMemArea->sMMapOffsetStructList);
#if defined(DEBUG_LINUX_MEM_AREAS)
DebugLinuxMemAreaRecordAdd(psLinuxMemArea, ui32AreaFlags);
#endif
if (AreaIsUncached(ui32AreaFlags) && !bFromPagePool)
{
OSInvalidateCPUCacheRangeKM(psLinuxMemArea, pvCpuVAddr, ui32Bytes);
}
return psLinuxMemArea;
failed:
PVR_DPF((PVR_DBG_ERROR, "%s: failed!", __FUNCTION__));
#if defined(PVR_LINUX_MEM_AREA_USE_VMAP)
if (ppsPageList)
{
FreePages(bFromPagePool, ppsPageList, hBlockPageList, ui32NumPages);
}
#endif
if (psLinuxMemArea)
{