/* command processing for pipe put operation */ /* * Copyright (c) 1997-2014 Wind River Systems, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1) Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2) Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3) Neither the name of Wind River Systems nor the names of its contributors * may be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include /** * * @brief Process request command for a pipe put operation * * @return N/A */ void _k_pipe_put_request(struct k_args *RequestOrig) { struct k_args *Request; struct k_args *RequestProc; kpipe_t pipeId = RequestOrig->Args.pipe_req.ReqInfo.ChRef.Id; bool bAsync; if (_ASYNCREQ == _k_pipe_request_type_get(&RequestOrig->Args)) { bAsync = true; } else { bAsync = false; } if (!bAsync) { /* First save the pointer to the task's TCB for rescheduling later */ RequestOrig->Ctxt.proc = _k_current_task; _k_state_bit_set(_k_current_task, TF_SEND); } else { /* No need to put in data about sender, since it's a poster */ RequestOrig->Ctxt.proc = NULL; } mycopypacket(&Request, RequestOrig); /* if we end up here, we arrived at destination node and the packet Request is not local */ /* Now, we need a new packet for processing of the request; the Request package is too small b/c of space lost due to possible embedded local data */ mycopypacket(&RequestProc, Request); RequestProc->Args.pipe_xfer_req.ReqInfo.ChRef.pPipe = &(_k_pipe_list[OBJ_INDEX(pipeId)]); switch (_k_pipe_request_type_get(&RequestProc->Args)) { case _SYNCREQ: RequestProc->Args.pipe_xfer_req.pData = Request->Args.pipe_req.ReqType.Sync.pData; RequestProc->Args.pipe_xfer_req.iSizeTotal = Request->Args.pipe_req.ReqType.Sync.iSizeTotal; break; case _ASYNCREQ: RequestProc->Args.pipe_xfer_req.pData = Request->Args.pipe_req.ReqType.Async.block.pointer_to_data; RequestProc->Args.pipe_xfer_req.iSizeTotal = Request->Args.pipe_req.ReqType.Async.iSizeTotal; break; default: break; } RequestProc->Args.pipe_xfer_req.status = XFER_IDLE; RequestProc->Args.pipe_xfer_req.iNbrPendXfers = 0; RequestProc->Args.pipe_xfer_req.iSizeXferred = 0; RequestProc->Forw = NULL; RequestProc->Head = NULL; switch (RequestProc->Time.ticks) { case TICKS_NONE: _k_pipe_time_type_set(&RequestProc->Args, _TIME_NB); break; case TICKS_UNLIMITED: _k_pipe_time_type_set(&RequestProc->Args, _TIME_B); break; default: _k_pipe_time_type_set(&RequestProc->Args, _TIME_BT); break; } /* start processing */ struct pipe_struct *pPipe; pPipe = RequestProc->Args.pipe_xfer_req.ReqInfo.ChRef.pPipe; do { int iSpace2WriteinReaders; int iFreeBufferSpace; int iTotalSpace2Write; int32_t ticks; iSpace2WriteinReaders = CalcFreeReaderSpace(pPipe->Readers); iFreeBufferSpace = pPipe->desc.iFreeSpaceCont + pPipe->desc.iFreeSpaceAWA; iTotalSpace2Write = iFreeBufferSpace + iSpace2WriteinReaders; if (0 == iTotalSpace2Write) break; /* special case b/c even not good enough for 1_TO_N */ /* (possibly) do some processing */ ticks = RequestProc->Time.ticks; RequestProc->Time.timer = NULL; _k_pipe_process(pPipe, RequestProc /* writer */, NULL /* reader */); RequestProc->Time.ticks = ticks; /* check if request was processed */ if (TERM_XXX & RequestProc->Args.pipe_xfer_req.status) { RequestProc->Time.timer = NULL; /* not really required */ return; /* not listed anymore --> completely processed */ } } while (0); /* if we got up to here, we did none or SOME (partial) * processing on the request */ if (_TIME_NB != _k_pipe_time_type_get(&RequestProc->Args)) { /* call is blocking */ INSERT_ELM(pPipe->Writers, RequestProc); /* * NOTE: It is both faster and simpler to blindly assign the * PIPE_PUT_TIMEOUT microkernel command to the packet even though it * is only useful to the finite timeout case. */ RequestProc->Comm = PIPE_PUT_TIMEOUT; if (_TIME_B == _k_pipe_time_type_get(&RequestProc->Args)) { /* * The writer specified TICKS_UNLIMITED; NULL the timer. */ RequestProc->Time.timer = NULL; return; } else { /* { TIME_BT } */ #ifdef CANCEL_TIMERS if (RequestProc->Args.pipe_xfer_req.iSizeXferred != 0) { RequestProc->Time.timer = NULL; } else #endif /* enlist a new timer into the timeout chain */ _k_timeout_alloc(RequestProc); return; } } else { /* call is non-blocking; Check if we don't have to queue it b/c it could not be processed at once */ RequestProc->Time.timer = NULL; if (XFER_BUSY == RequestProc->Args.pipe_xfer_req.status) { INSERT_ELM(pPipe->Writers, RequestProc); } else { __ASSERT_NO_MSG(XFER_IDLE == RequestProc->Args.pipe_xfer_req.status); __ASSERT_NO_MSG(0 == RequestProc->Args.pipe_xfer_req.iSizeXferred); RequestProc->Comm = PIPE_PUT_REPLY; _k_pipe_put_reply(RequestProc); } return; } } /** * * @brief Perform timeout command for a pipe put operation * * @return N/A */ void _k_pipe_put_timeout(struct k_args *ReqProc) { __ASSERT_NO_MSG(NULL != ReqProc->Time.timer); myfreetimer(&(ReqProc->Time.timer)); _k_pipe_request_status_set(&ReqProc->Args.pipe_xfer_req, TERM_TMO); DeListWaiter(ReqProc); if (0 == ReqProc->Args.pipe_xfer_req.iNbrPendXfers) { _k_pipe_put_reply(ReqProc); } } /** * * @brief Process reply command for a pipe put operation * * @return N/A */ void _k_pipe_put_reply(struct k_args *ReqProc) { __ASSERT_NO_MSG( 0 == ReqProc->Args.pipe_xfer_req.iNbrPendXfers /* no pending Xfers */ && NULL == ReqProc->Time.timer /* no pending timer */ && NULL == ReqProc->Head); /* not in list */ /* orig packet must be sent back, not ReqProc */ struct k_args *ReqOrig = ReqProc->Ctxt.args; PIPE_REQUEST_STATUS status; ReqOrig->Comm = PIPE_PUT_ACK; /* determine return value: */ status = ReqProc->Args.pipe_xfer_req.status; if (unlikely(TERM_TMO == status)) { ReqOrig->Time.rcode = RC_TIME; } else if ((TERM_XXX | XFER_IDLE) & status) { K_PIPE_OPTION Option = _k_pipe_option_get(&ReqProc->Args); if (likely(ReqProc->Args.pipe_xfer_req.iSizeXferred == ReqProc->Args.pipe_xfer_req.iSizeTotal)) { /* All data has been transferred */ ReqOrig->Time.rcode = RC_OK; } else if (ReqProc->Args.pipe_xfer_req.iSizeXferred != 0) { /* Some but not all data has been transferred */ ReqOrig->Time.rcode = (Option == _ALL_N) ? RC_INCOMPLETE : RC_OK; } else { /* No data has been transferred */ ReqOrig->Time.rcode = (Option == _0_TO_N) ? RC_OK : RC_FAIL; } } else { /* unknown (invalid) status */ __ASSERT_NO_MSG(1 == 0); /* should not come here */ } if (_ASYNCREQ != _k_pipe_request_type_get(&ReqOrig->Args)) { ReqOrig->Args.pipe_ack.iSizeXferred = ReqProc->Args.pipe_xfer_req.iSizeXferred; } SENDARGS(ReqOrig); FREEARGS(ReqProc); } /** * * @brief Process acknowledgment command for a pipe put operation * * @return N/A */ void _k_pipe_put_ack(struct k_args *Request) { if (_ASYNCREQ == _k_pipe_request_type_get(&Request->Args)) { struct _pipe_ack_arg *pipe_ack = &Request->Args.pipe_ack; struct k_args A; struct k_block *blockptr; /* invoke command to release block */ blockptr = &pipe_ack->ReqType.Async.block; A.Comm = REL_BLOCK; A.Args.p1.poolid = blockptr->poolid; A.Args.p1.req_size = blockptr->req_size; A.Args.p1.rep_poolptr = blockptr->address_in_pool; A.Args.p1.rep_dataptr = blockptr->pointer_to_data; _k_mem_pool_block_release(&A); /* will return immediately */ if ((ksem_t)NULL != pipe_ack->ReqType.Async.sema) { /* invoke command to signal sema */ struct k_args A; A.Comm = SIGNALS; A.Args.s1.sema = pipe_ack->ReqType.Async.sema; _k_sem_signal(&A); /* will return immediately */ } } else { /* Reschedule the sender task */ struct k_args *LocalReq; LocalReq = Request->Ctxt.args; LocalReq->Time.rcode = Request->Time.rcode; LocalReq->Args.pipe_ack = Request->Args.pipe_ack; _k_state_bit_reset(LocalReq->Ctxt.proc, TF_SEND | TF_SENDDATA); } FREEARGS(Request); }