| /*************************************************************************/ /*! |
| @File |
| @Title Transport Layer kernel side API implementation. |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @Description Transport Layer functions available to driver components in |
| the driver. |
| @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. |
| */ /**************************************************************************/ |
| //#define PVR_DPF_FUNCTION_TRACE_ON 1 |
| #undef PVR_DPF_FUNCTION_TRACE_ON |
| #include "pvr_debug.h" |
| |
| #include "allocmem.h" |
| #include "pvrsrv_error.h" |
| #include "osfunc.h" |
| #include "devicemem.h" |
| |
| #include "pvrsrv_tlcommon.h" |
| #include "tlintern.h" |
| |
| /* |
| * Make functions |
| */ |
| PTL_STREAM_DESC |
| TLMakeStreamDesc(PTL_SNODE f1, IMG_UINT32 f2, IMG_HANDLE f3) |
| { |
| PTL_STREAM_DESC ps = OSAllocZMem(sizeof(TL_STREAM_DESC)); |
| if (ps == NULL) |
| { |
| return NULL; |
| } |
| ps->psNode = f1; |
| ps->ui32Flags = f2; |
| ps->hReadEvent = f3; |
| ps->uiRefCount = 1; |
| |
| if (f2 & PVRSRV_STREAM_FLAG_READ_LIMIT) |
| { |
| ps->ui32ReadLimit = f1->psStream->ui32Write; |
| } |
| return ps; |
| } |
| |
| PTL_SNODE |
| TLMakeSNode(IMG_HANDLE f2, TL_STREAM *f3, TL_STREAM_DESC *f4) |
| { |
| PTL_SNODE ps = OSAllocZMem(sizeof(TL_SNODE)); |
| if (ps == NULL) |
| { |
| return NULL; |
| } |
| ps->hReadEventObj = f2; |
| ps->psStream = f3; |
| ps->psRDesc = f4; |
| f3->psNode = ps; |
| return ps; |
| } |
| |
| /* |
| * Transport Layer Global top variables and functions |
| */ |
| static TL_GLOBAL_DATA sTLGlobalData; |
| |
| TL_GLOBAL_DATA *TLGGD(void) // TLGetGlobalData() |
| { |
| return &sTLGlobalData; |
| } |
| |
| /* TLInit must only be called once at driver initialisation. |
| * An assert is provided to check this condition on debug builds. |
| */ |
| PVRSRV_ERROR |
| TLInit(void) |
| { |
| PVRSRV_ERROR eError; |
| |
| PVR_DPF_ENTERED; |
| |
| PVR_ASSERT (sTLGlobalData.hTLGDLock == NULL && sTLGlobalData.hTLEventObj == NULL); |
| |
| /* Allocate a lock for TL global data, to be used while updating the TL data. |
| * This is for making TL global data muti-thread safe */ |
| eError = OSLockCreate (&sTLGlobalData.hTLGDLock); |
| if (eError != PVRSRV_OK) |
| { |
| goto e0; |
| } |
| |
| /* Allocate the event object used to signal global TL events such as |
| * new stream created */ |
| eError = OSEventObjectCreate("TLGlobalEventObj", &sTLGlobalData.hTLEventObj); |
| if (eError != PVRSRV_OK) |
| { |
| goto e1; |
| } |
| |
| PVR_DPF_RETURN_OK; |
| |
| /* Don't allow the driver to start up on error */ |
| e1: |
| OSLockDestroy (sTLGlobalData.hTLGDLock); |
| sTLGlobalData.hTLGDLock = NULL; |
| e0: |
| PVR_DPF_RETURN_RC (eError); |
| } |
| |
| static void RemoveAndFreeStreamNode(PTL_SNODE psRemove) |
| { |
| TL_GLOBAL_DATA* psGD = TLGGD(); |
| PTL_SNODE* last; |
| PTL_SNODE psn; |
| PVRSRV_ERROR eError; |
| |
| PVR_DPF_ENTERED; |
| |
| /* Unlink the stream node from the master list */ |
| PVR_ASSERT(psGD->psHead); |
| last = &psGD->psHead; |
| for (psn = psGD->psHead; psn; psn=psn->psNext) |
| { |
| if (psn == psRemove) |
| { |
| /* Other calling code may have freed and zeroed the pointers */ |
| if (psn->psRDesc) |
| { |
| OSFreeMem(psn->psRDesc); |
| psn->psRDesc = NULL; |
| } |
| if (psn->psStream) |
| { |
| OSFreeMem(psn->psStream); |
| psn->psStream = NULL; |
| } |
| *last = psn->psNext; |
| break; |
| } |
| last = &psn->psNext; |
| } |
| |
| /* Release the event list object owned by the stream node */ |
| if (psRemove->hReadEventObj) |
| { |
| eError = OSEventObjectDestroy(psRemove->hReadEventObj); |
| PVR_LOG_IF_ERROR(eError, "OSEventObjectDestroy"); |
| |
| psRemove->hReadEventObj = NULL; |
| } |
| |
| /* Release the memory of the stream node */ |
| OSFreeMem(psRemove); |
| |
| PVR_DPF_RETURN; |
| } |
| |
| void |
| TLDeInit(void) |
| { |
| PVR_DPF_ENTERED; |
| |
| if (sTLGlobalData.uiClientCnt) |
| { |
| PVR_DPF((PVR_DBG_ERROR, "TLDeInit transport layer but %d client streams are still connected", sTLGlobalData.uiClientCnt)); |
| sTLGlobalData.uiClientCnt = 0; |
| } |
| |
| /* Clean up the SNODE list */ |
| if (sTLGlobalData.psHead) |
| { |
| while (sTLGlobalData.psHead) |
| { |
| RemoveAndFreeStreamNode(sTLGlobalData.psHead); |
| } |
| /* Leave psHead NULL on loop exit */ |
| } |
| |
| /* Clean up the TL global event object */ |
| if (sTLGlobalData.hTLEventObj) |
| { |
| OSEventObjectDestroy(sTLGlobalData.hTLEventObj); |
| sTLGlobalData.hTLEventObj = NULL; |
| } |
| |
| /* Destroy the TL global data lock */ |
| if (sTLGlobalData.hTLGDLock) |
| { |
| OSLockDestroy (sTLGlobalData.hTLGDLock); |
| sTLGlobalData.hTLGDLock = NULL; |
| } |
| |
| PVR_DPF_RETURN; |
| } |
| |
| void TLAddStreamNode(PTL_SNODE psAdd) |
| { |
| PVR_DPF_ENTERED; |
| |
| PVR_ASSERT(psAdd); |
| psAdd->psNext = TLGGD()->psHead; |
| TLGGD()->psHead = psAdd; |
| |
| PVR_DPF_RETURN; |
| } |
| |
| PTL_SNODE TLFindStreamNodeByName(const IMG_CHAR *pszName) |
| { |
| TL_GLOBAL_DATA* psGD = TLGGD(); |
| PTL_SNODE psn; |
| |
| PVR_DPF_ENTERED; |
| |
| PVR_ASSERT(pszName); |
| |
| for (psn = psGD->psHead; psn; psn=psn->psNext) |
| { |
| if (psn->psStream && OSStringCompare(psn->psStream->szName, pszName)==0) |
| { |
| PVR_DPF_RETURN_VAL(psn); |
| } |
| } |
| |
| PVR_DPF_RETURN_VAL(NULL); |
| } |
| |
| PTL_SNODE TLFindStreamNodeByDesc(PTL_STREAM_DESC psDesc) |
| { |
| TL_GLOBAL_DATA* psGD = TLGGD(); |
| PTL_SNODE psn; |
| |
| PVR_DPF_ENTERED; |
| |
| PVR_ASSERT(psDesc); |
| |
| for (psn = psGD->psHead; psn; psn=psn->psNext) |
| { |
| if (psn->psRDesc == psDesc || psn->psWDesc == psDesc) |
| { |
| PVR_DPF_RETURN_VAL(psn); |
| } |
| } |
| PVR_DPF_RETURN_VAL(NULL); |
| } |
| |
| static inline IMG_BOOL IsDigit(IMG_CHAR c) |
| { |
| return c >= '0' && c <= '9'; |
| } |
| |
| static inline IMG_BOOL ReadNumber(const IMG_CHAR *pszBuffer, |
| IMG_UINT32 *pui32Number) |
| { |
| IMG_CHAR acTmp[11] = {0}; // max 10 digits |
| IMG_UINT32 ui32Result; |
| IMG_UINT i; |
| |
| for (i = 0; i < sizeof(acTmp) - 1; i++) |
| { |
| if (!IsDigit(*pszBuffer)) |
| break; |
| acTmp[i] = *pszBuffer++; |
| } |
| |
| /* if there are no digits or there is something after the number */ |
| if (i == 0 || *pszBuffer != '\0') |
| return IMG_FALSE; |
| |
| if (OSStringToUINT32(acTmp, 10, &ui32Result) != PVRSRV_OK) |
| return IMG_FALSE; |
| |
| *pui32Number = ui32Result; |
| |
| return IMG_TRUE; |
| } |
| |
| IMG_UINT32 TLDiscoverStreamNodes(const IMG_CHAR *pszNamePattern, |
| IMG_CHAR aaszStreams[][PRVSRVTL_MAX_STREAM_NAME_SIZE], |
| IMG_UINT32 ui32Max) |
| { |
| TL_GLOBAL_DATA *psGD = TLGGD(); |
| PTL_SNODE psn; |
| IMG_UINT32 ui32Count = 0; |
| size_t uiLen; |
| |
| PVR_ASSERT(pszNamePattern); |
| |
| if ((uiLen = OSStringLength(pszNamePattern)) == 0) |
| return 0; |
| |
| for (psn = psGD->psHead; psn; psn = psn->psNext) |
| { |
| if (OSStringNCompare(pszNamePattern, psn->psStream->szName, uiLen) != 0) |
| continue; |
| |
| /* If aaszStreams is NULL we only count how many string match |
| * the given pattern. If it's a valid pointer we also return |
| * the names. */ |
| if (aaszStreams != NULL) |
| { |
| if (ui32Count >= ui32Max) |
| break; |
| |
| /* all of names are shorter than MAX and null terminated */ |
| OSStringNCopy(aaszStreams[ui32Count], psn->psStream->szName, |
| PRVSRVTL_MAX_STREAM_NAME_SIZE); |
| } |
| |
| ui32Count++; |
| } |
| |
| return ui32Count; |
| } |
| |
| PTL_SNODE TLFindAndGetStreamNodeByDesc(PTL_STREAM_DESC psDesc) |
| { |
| PTL_SNODE psn; |
| |
| PVR_DPF_ENTERED; |
| |
| psn = TLFindStreamNodeByDesc(psDesc); |
| if (psn == NULL) |
| PVR_DPF_RETURN_VAL(NULL); |
| |
| PVR_ASSERT(psDesc == psn->psWDesc); |
| |
| psn->uiWRefCount++; |
| psDesc->uiRefCount++; |
| |
| PVR_DPF_RETURN_VAL(psn); |
| } |
| |
| void TLReturnStreamNode(PTL_SNODE psNode) |
| { |
| psNode->uiWRefCount--; |
| psNode->psWDesc->uiRefCount--; |
| |
| PVR_ASSERT(psNode->uiWRefCount > 0); |
| PVR_ASSERT(psNode->psWDesc->uiRefCount > 0); |
| } |
| |
| IMG_BOOL TLTryRemoveStreamAndFreeStreamNode(PTL_SNODE psRemove) |
| { |
| PVR_DPF_ENTERED; |
| |
| PVR_ASSERT(psRemove); |
| |
| /* If there is a client connected to this stream, defer stream's deletion */ |
| if (psRemove->psRDesc != NULL || psRemove->psWDesc != NULL) |
| { |
| PVR_DPF_RETURN_VAL (IMG_FALSE); |
| } |
| |
| /* Remove stream from TL_GLOBAL_DATA's list and free stream node */ |
| psRemove->psStream = NULL; |
| RemoveAndFreeStreamNode(psRemove); |
| |
| PVR_DPF_RETURN_VAL (IMG_TRUE); |
| } |
| |
| IMG_BOOL TLUnrefDescAndTryFreeStreamNode(PTL_SNODE psNodeToRemove, |
| PTL_STREAM_DESC psSD) |
| { |
| PVR_DPF_ENTERED; |
| |
| PVR_ASSERT(psNodeToRemove); |
| PVR_ASSERT(psSD); |
| |
| /* Decrement reference count. For descriptor obtained by reader it must |
| * reach 0 (only single reader allowed) and for descriptors obtained by |
| * writers it must reach value greater or equal to 0 (multiple writers |
| * model). */ |
| psSD->uiRefCount--; |
| |
| if (psSD == psNodeToRemove->psRDesc) |
| { |
| PVR_ASSERT(0 == psSD->uiRefCount); |
| /* Remove stream descriptor (i.e. stream reader context) */ |
| psNodeToRemove->psRDesc = NULL; |
| } |
| else if (psSD == psNodeToRemove->psWDesc) |
| { |
| PVR_ASSERT(0 <= psSD->uiRefCount); |
| |
| psNodeToRemove->uiWRefCount--; |
| |
| /* Remove stream descriptor if reference == 0 */ |
| if (0 == psSD->uiRefCount) |
| { |
| psNodeToRemove->psWDesc = NULL; |
| } |
| } |
| |
| /* Do not Free Stream Node if there is a write reference (a producer |
| * context) to the stream */ |
| if (NULL != psNodeToRemove->psRDesc || NULL != psNodeToRemove->psWDesc || |
| 0 != psNodeToRemove->uiWRefCount) |
| { |
| PVR_DPF_RETURN_VAL (IMG_FALSE); |
| } |
| |
| /* Make stream pointer NULL to prevent it from being destroyed in |
| * RemoveAndFreeStreamNode Cleanup of stream should be done by the calling |
| * context */ |
| psNodeToRemove->psStream = NULL; |
| RemoveAndFreeStreamNode(psNodeToRemove); |
| |
| PVR_DPF_RETURN_VAL (IMG_TRUE); |
| } |