diff options
Diffstat (limited to 'pvr-source/services4/srvkm/env/linux/event.c')
| -rw-r--r-- | pvr-source/services4/srvkm/env/linux/event.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/pvr-source/services4/srvkm/env/linux/event.c b/pvr-source/services4/srvkm/env/linux/event.c new file mode 100644 index 0000000..b70a79d --- /dev/null +++ b/pvr-source/services4/srvkm/env/linux/event.c @@ -0,0 +1,414 @@ +/*************************************************************************/ /*! +@Title Event Object +@Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved +@License Dual MIT/GPLv2 + +The contents of this file are subject to the MIT license as set out below. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +Alternatively, the contents of this file may be used under the terms of +the GNU General Public License Version 2 ("GPL") in which case the provisions +of GPL are applicable instead of those above. + +If you wish to allow use of your version of this file only under the terms of +GPL, and not to allow others to use your version of this file under the terms +of the MIT license, indicate your decision by deleting the provisions above +and replace them with the notice and other provisions required by GPL as set +out in the file called "GPL-COPYING" included in this distribution. If you do +not delete the provisions above, a recipient may use your version of this file +under the terms of either the MIT license or GPL. + +This License is also included in this distribution in the file called +"MIT-COPYING". + +EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS +PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING +BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR +PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ /**************************************************************************/ + +#include <linux/version.h> + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)) +#ifndef AUTOCONF_INCLUDED +#include <linux/config.h> +#endif +#endif + +#include <asm/io.h> +#include <asm/page.h> +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)) +#include <asm/system.h> +#endif +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/delay.h> +#include <linux/pci.h> + +#include <linux/string.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <asm/hardirq.h> +#include <linux/spinlock.h> +#include <linux/timer.h> +#include <linux/capability.h> +#include <linux/sched.h> +#include <asm/uaccess.h> + +#include "img_types.h" +#include "services_headers.h" +#include "mm.h" +#include "pvrmmap.h" +#include "mmap.h" +#include "env_data.h" +#include "proc.h" +#include "mutex.h" +#include "lock.h" +#include "event.h" + +typedef struct PVRSRV_LINUX_EVENT_OBJECT_LIST_TAG +{ + rwlock_t sLock; + struct list_head sList; + +} PVRSRV_LINUX_EVENT_OBJECT_LIST; + + +typedef struct PVRSRV_LINUX_EVENT_OBJECT_TAG +{ + atomic_t sTimeStamp; + IMG_UINT32 ui32TimeStampPrevious; +#if defined(DEBUG) + IMG_UINT ui32Stats; +#endif + wait_queue_head_t sWait; + struct list_head sList; + IMG_HANDLE hResItem; + PVRSRV_LINUX_EVENT_OBJECT_LIST *psLinuxEventObjectList; +} PVRSRV_LINUX_EVENT_OBJECT; + +/*! +****************************************************************************** + + @Function LinuxEventObjectListCreate + + @Description + + Linux wait object list creation + + @Output hOSEventKM : Pointer to the event object list handle + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +PVRSRV_ERROR LinuxEventObjectListCreate(IMG_HANDLE *phEventObjectList) +{ + PVRSRV_LINUX_EVENT_OBJECT_LIST *psEventObjectList; + + if(OSAllocMem(PVRSRV_OS_NON_PAGEABLE_HEAP, sizeof(PVRSRV_LINUX_EVENT_OBJECT_LIST), + (IMG_VOID **)&psEventObjectList, IMG_NULL, + "Linux Event Object List") != PVRSRV_OK) + { + PVR_DPF((PVR_DBG_ERROR, "LinuxEventObjectCreate: failed to allocate memory for event list")); + return PVRSRV_ERROR_OUT_OF_MEMORY; + } + + INIT_LIST_HEAD(&psEventObjectList->sList); + + rwlock_init(&psEventObjectList->sLock); + + *phEventObjectList = (IMG_HANDLE *) psEventObjectList; + + return PVRSRV_OK; +} + +/*! +****************************************************************************** + + @Function LinuxEventObjectListDestroy + + @Description + + Linux wait object list destruction + + @Input hOSEventKM : Event object list handle + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +PVRSRV_ERROR LinuxEventObjectListDestroy(IMG_HANDLE hEventObjectList) +{ + + PVRSRV_LINUX_EVENT_OBJECT_LIST *psEventObjectList = (PVRSRV_LINUX_EVENT_OBJECT_LIST *) hEventObjectList ; + + if(psEventObjectList) + { + IMG_BOOL bListEmpty; + + read_lock(&psEventObjectList->sLock); + bListEmpty = list_empty(&psEventObjectList->sList); + read_unlock(&psEventObjectList->sLock); + + if (!bListEmpty) + { + PVR_DPF((PVR_DBG_ERROR, "LinuxEventObjectListDestroy: Event List is not empty")); + return PVRSRV_ERROR_UNABLE_TO_DESTROY_EVENT; + } + + OSFreeMem(PVRSRV_OS_NON_PAGEABLE_HEAP, sizeof(PVRSRV_LINUX_EVENT_OBJECT_LIST), psEventObjectList, IMG_NULL); + /*not nulling pointer, copy on stack*/ + } + + return PVRSRV_OK; +} + + +/*! +****************************************************************************** + + @Function LinuxEventObjectDelete + + @Description + + Linux wait object removal + + @Input hOSEventObjectList : Event object list handle + @Input hOSEventObject : Event object handle + @Input bResManCallback : Called from the resman + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +PVRSRV_ERROR LinuxEventObjectDelete(IMG_HANDLE hOSEventObjectList, IMG_HANDLE hOSEventObject) +{ + if(hOSEventObjectList) + { + if(hOSEventObject) + { + PVRSRV_LINUX_EVENT_OBJECT *psLinuxEventObject = (PVRSRV_LINUX_EVENT_OBJECT *)hOSEventObject; +#if defined(DEBUG) + PVR_DPF((PVR_DBG_MESSAGE, "LinuxEventObjectListDelete: Event object waits: %u", psLinuxEventObject->ui32Stats)); +#endif + if(ResManFreeResByPtr(psLinuxEventObject->hResItem, CLEANUP_WITH_POLL) != PVRSRV_OK) + { + return PVRSRV_ERROR_UNABLE_TO_DESTROY_EVENT; + } + + return PVRSRV_OK; + } + } + return PVRSRV_ERROR_UNABLE_TO_DESTROY_EVENT; + +} + +/*! +****************************************************************************** + + @Function LinuxEventObjectDeleteCallback + + @Description + + Linux wait object removal + + @Input hOSEventObject : Event object handle + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +static PVRSRV_ERROR LinuxEventObjectDeleteCallback(IMG_PVOID pvParam, IMG_UINT32 ui32Param, IMG_BOOL bForceCleanup) +{ + PVRSRV_LINUX_EVENT_OBJECT *psLinuxEventObject = pvParam; + PVRSRV_LINUX_EVENT_OBJECT_LIST *psLinuxEventObjectList = psLinuxEventObject->psLinuxEventObjectList; + unsigned long ulLockFlags; + + PVR_UNREFERENCED_PARAMETER(ui32Param); + PVR_UNREFERENCED_PARAMETER(bForceCleanup); + + write_lock_irqsave(&psLinuxEventObjectList->sLock, ulLockFlags); + list_del(&psLinuxEventObject->sList); + write_unlock_irqrestore(&psLinuxEventObjectList->sLock, ulLockFlags); + +#if defined(DEBUG) + PVR_DPF((PVR_DBG_MESSAGE, "LinuxEventObjectDeleteCallback: Event object waits: %u", psLinuxEventObject->ui32Stats)); +#endif + + OSFreeMem(PVRSRV_OS_NON_PAGEABLE_HEAP, sizeof(PVRSRV_LINUX_EVENT_OBJECT), psLinuxEventObject, IMG_NULL); + /*not nulling pointer, copy on stack*/ + + return PVRSRV_OK; +} +/*! +****************************************************************************** + + @Function LinuxEventObjectAdd + + @Description + + Linux wait object addition + + @Input hOSEventObjectList : Event object list handle + @Output phOSEventObject : Pointer to the event object handle + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +PVRSRV_ERROR LinuxEventObjectAdd(IMG_HANDLE hOSEventObjectList, IMG_HANDLE *phOSEventObject) + { + PVRSRV_LINUX_EVENT_OBJECT *psLinuxEventObject; + PVRSRV_LINUX_EVENT_OBJECT_LIST *psLinuxEventObjectList = (PVRSRV_LINUX_EVENT_OBJECT_LIST*)hOSEventObjectList; + IMG_UINT32 ui32PID = OSGetCurrentProcessIDKM(); + PVRSRV_PER_PROCESS_DATA *psPerProc; + unsigned long ulLockFlags; + + psPerProc = PVRSRVPerProcessData(ui32PID); + if (psPerProc == IMG_NULL) + { + PVR_DPF((PVR_DBG_ERROR, "LinuxEventObjectAdd: Couldn't find per-process data")); + return PVRSRV_ERROR_OUT_OF_MEMORY; + } + + /* allocate completion variable */ + if(OSAllocMem(PVRSRV_OS_NON_PAGEABLE_HEAP, sizeof(PVRSRV_LINUX_EVENT_OBJECT), + (IMG_VOID **)&psLinuxEventObject, IMG_NULL, + "Linux Event Object") != PVRSRV_OK) + { + PVR_DPF((PVR_DBG_ERROR, "LinuxEventObjectAdd: failed to allocate memory ")); + return PVRSRV_ERROR_OUT_OF_MEMORY; + } + + INIT_LIST_HEAD(&psLinuxEventObject->sList); + + atomic_set(&psLinuxEventObject->sTimeStamp, 0); + psLinuxEventObject->ui32TimeStampPrevious = 0; + +#if defined(DEBUG) + psLinuxEventObject->ui32Stats = 0; +#endif + init_waitqueue_head(&psLinuxEventObject->sWait); + + psLinuxEventObject->psLinuxEventObjectList = psLinuxEventObjectList; + + psLinuxEventObject->hResItem = ResManRegisterRes(psPerProc->hResManContext, + RESMAN_TYPE_EVENT_OBJECT, + psLinuxEventObject, + 0, + &LinuxEventObjectDeleteCallback); + + write_lock_irqsave(&psLinuxEventObjectList->sLock, ulLockFlags); + list_add(&psLinuxEventObject->sList, &psLinuxEventObjectList->sList); + write_unlock_irqrestore(&psLinuxEventObjectList->sLock, ulLockFlags); + + *phOSEventObject = psLinuxEventObject; + + return PVRSRV_OK; +} + +/*! +****************************************************************************** + + @Function LinuxEventObjectSignal + + @Description + + Linux wait object signaling function + + @Input hOSEventObjectList : Event object list handle + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +PVRSRV_ERROR LinuxEventObjectSignal(IMG_HANDLE hOSEventObjectList) +{ + PVRSRV_LINUX_EVENT_OBJECT *psLinuxEventObject; + PVRSRV_LINUX_EVENT_OBJECT_LIST *psLinuxEventObjectList = (PVRSRV_LINUX_EVENT_OBJECT_LIST*)hOSEventObjectList; + struct list_head *psListEntry, *psList; + + psList = &psLinuxEventObjectList->sList; + + /* + * We don't take the write lock in interrupt context, so we don't + * need to use read_lock_irqsave. + */ + read_lock(&psLinuxEventObjectList->sLock); + list_for_each(psListEntry, psList) + { + + psLinuxEventObject = (PVRSRV_LINUX_EVENT_OBJECT *)list_entry(psListEntry, PVRSRV_LINUX_EVENT_OBJECT, sList); + + atomic_inc(&psLinuxEventObject->sTimeStamp); + wake_up_interruptible(&psLinuxEventObject->sWait); + } + read_unlock(&psLinuxEventObjectList->sLock); + + return PVRSRV_OK; + +} + +/*! +****************************************************************************** + + @Function LinuxEventObjectWait + + @Description + + Linux wait object routine + + @Input hOSEventObject : Event object handle + + @Input ui32MSTimeout : Time out value in msec + + @Return PVRSRV_ERROR : Error code + +******************************************************************************/ +PVRSRV_ERROR LinuxEventObjectWait(IMG_HANDLE hOSEventObject, IMG_UINT32 ui32MSTimeout) +{ + IMG_UINT32 ui32TimeStamp; + DEFINE_WAIT(sWait); + + PVRSRV_LINUX_EVENT_OBJECT *psLinuxEventObject = (PVRSRV_LINUX_EVENT_OBJECT *) hOSEventObject; + + IMG_UINT32 ui32TimeOutJiffies = msecs_to_jiffies(ui32MSTimeout); + + do + { + prepare_to_wait(&psLinuxEventObject->sWait, &sWait, TASK_INTERRUPTIBLE); + ui32TimeStamp = (IMG_UINT32)atomic_read(&psLinuxEventObject->sTimeStamp); + + if(psLinuxEventObject->ui32TimeStampPrevious != ui32TimeStamp) + { + break; + } + + LinuxUnLockMutex(&gPVRSRVLock); + + ui32TimeOutJiffies = (IMG_UINT32)schedule_timeout((IMG_INT32)ui32TimeOutJiffies); + + LinuxLockMutex(&gPVRSRVLock); +#if defined(DEBUG) + psLinuxEventObject->ui32Stats++; +#endif + + + } while (ui32TimeOutJiffies); + + finish_wait(&psLinuxEventObject->sWait, &sWait); + + psLinuxEventObject->ui32TimeStampPrevious = ui32TimeStamp; + + return ui32TimeOutJiffies ? PVRSRV_OK : PVRSRV_ERROR_TIMEOUT; + +} + |