diff options
Diffstat (limited to 'drivers/scsi/isci/request.c')
| -rw-r--r-- | drivers/scsi/isci/request.c | 380 |
1 files changed, 336 insertions, 44 deletions
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c index b5d3a8c4d32..565a9f0a9bc 100644 --- a/drivers/scsi/isci/request.c +++ b/drivers/scsi/isci/request.c @@ -481,7 +481,29 @@ static void sci_stp_optimized_request_construct(struct isci_request *ireq, } } +static void sci_atapi_construct(struct isci_request *ireq) +{ + struct host_to_dev_fis *h2d_fis = &ireq->stp.cmd; + struct sas_task *task; + + /* To simplify the implementation we take advantage of the + * silicon's partial acceleration of atapi protocol (dma data + * transfers), so we promote all commands to dma protocol. This + * breaks compatibility with ATA_HORKAGE_ATAPI_MOD16_DMA drives. + */ + h2d_fis->features |= ATAPI_PKT_DMA; + scu_stp_raw_request_construct_task_context(ireq); + + task = isci_request_access_task(ireq); + if (task->data_dir == DMA_NONE) + task->total_xfer_len = 0; + + /* clear the response so we can detect arrivial of an + * unsolicited h2d fis + */ + ireq->stp.rsp.fis_type = 0; +} static enum sci_status sci_io_request_construct_sata(struct isci_request *ireq, @@ -491,6 +513,7 @@ sci_io_request_construct_sata(struct isci_request *ireq, { enum sci_status status = SCI_SUCCESS; struct sas_task *task = isci_request_access_task(ireq); + struct domain_device *dev = ireq->target_device->domain_dev; /* check for management protocols */ if (ireq->ttype == tmf_task) { @@ -519,6 +542,13 @@ sci_io_request_construct_sata(struct isci_request *ireq, } + /* ATAPI */ + if (dev->sata_dev.command_set == ATAPI_COMMAND_SET && + task->ata_task.fis.command == ATA_CMD_PACKET) { + sci_atapi_construct(ireq); + return SCI_SUCCESS; + } + /* non data */ if (task->data_dir == DMA_NONE) { scu_stp_raw_request_construct_task_context(ireq); @@ -627,7 +657,7 @@ enum sci_status sci_task_request_construct_sata(struct isci_request *ireq) /** * sci_req_tx_bytes - bytes transferred when reply underruns request - * @sci_req: request that was terminated early + * @ireq: request that was terminated early */ #define SCU_TASK_CONTEXT_SRAM 0x200000 static u32 sci_req_tx_bytes(struct isci_request *ireq) @@ -729,6 +759,10 @@ sci_io_request_terminate(struct isci_request *ireq) case SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED: case SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG: case SCI_REQ_STP_SOFT_RESET_WAIT_D2H: + case SCI_REQ_ATAPI_WAIT_H2D: + case SCI_REQ_ATAPI_WAIT_PIO_SETUP: + case SCI_REQ_ATAPI_WAIT_D2H: + case SCI_REQ_ATAPI_WAIT_TC_COMP: sci_change_state(&ireq->sm, SCI_REQ_ABORTING); return SCI_SUCCESS; case SCI_REQ_TASK_WAIT_TC_RESP: @@ -1194,8 +1228,8 @@ static enum sci_status sci_stp_request_pio_data_out_transmit_data(struct isci_re { struct isci_stp_request *stp_req = &ireq->stp.req; struct scu_sgl_element_pair *sgl_pair; + enum sci_status status = SCI_SUCCESS; struct scu_sgl_element *sgl; - enum sci_status status; u32 offset; u32 len = 0; @@ -1249,7 +1283,7 @@ static enum sci_status sci_stp_request_pio_data_out_transmit_data(struct isci_re */ static enum sci_status sci_stp_request_pio_data_in_copy_data_buffer(struct isci_stp_request *stp_req, - u8 *data_buf, u32 len) + u8 *data_buf, u32 len) { struct isci_request *ireq; u8 *src_addr; @@ -1423,6 +1457,128 @@ static enum sci_status sci_stp_request_udma_general_frame_handler(struct isci_re return status; } +static enum sci_status process_unsolicited_fis(struct isci_request *ireq, + u32 frame_index) +{ + struct isci_host *ihost = ireq->owning_controller; + enum sci_status status; + struct dev_to_host_fis *frame_header; + u32 *frame_buffer; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + + if (status != SCI_SUCCESS) + return status; + + if (frame_header->fis_type != FIS_REGD2H) { + dev_err(&ireq->isci_host->pdev->dev, + "%s ERROR: invalid fis type 0x%X\n", + __func__, frame_header->fis_type); + return SCI_FAILURE; + } + + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + sci_controller_copy_sata_response(&ireq->stp.rsp, + (u32 *)frame_header, + frame_buffer); + + /* Frame has been decoded return it to the controller */ + sci_controller_release_frame(ihost, frame_index); + + return status; +} + +static enum sci_status atapi_d2h_reg_frame_handler(struct isci_request *ireq, + u32 frame_index) +{ + struct sas_task *task = isci_request_access_task(ireq); + enum sci_status status; + + status = process_unsolicited_fis(ireq, frame_index); + + if (status == SCI_SUCCESS) { + if (ireq->stp.rsp.status & ATA_ERR) + status = SCI_IO_FAILURE_RESPONSE_VALID; + } else { + status = SCI_IO_FAILURE_RESPONSE_VALID; + } + + if (status != SCI_SUCCESS) { + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = status; + } else { + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + } + + /* the d2h ufi is the end of non-data commands */ + if (task->data_dir == DMA_NONE) + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + + return status; +} + +static void scu_atapi_reconstruct_raw_frame_task_context(struct isci_request *ireq) +{ + struct ata_device *dev = sas_to_ata_dev(ireq->target_device->domain_dev); + void *atapi_cdb = ireq->ttype_ptr.io_task_ptr->ata_task.atapi_packet; + struct scu_task_context *task_context = ireq->tc; + + /* fill in the SCU Task Context for a DATA fis containing CDB in Raw Frame + * type. The TC for previous Packet fis was already there, we only need to + * change the H2D fis content. + */ + memset(&ireq->stp.cmd, 0, sizeof(struct host_to_dev_fis)); + memcpy(((u8 *)&ireq->stp.cmd + sizeof(u32)), atapi_cdb, ATAPI_CDB_LEN); + memset(&(task_context->type.stp), 0, sizeof(struct stp_task_context)); + task_context->type.stp.fis_type = FIS_DATA; + task_context->transfer_length_bytes = dev->cdb_len; +} + +static void scu_atapi_construct_task_context(struct isci_request *ireq) +{ + struct ata_device *dev = sas_to_ata_dev(ireq->target_device->domain_dev); + struct sas_task *task = isci_request_access_task(ireq); + struct scu_task_context *task_context = ireq->tc; + int cdb_len = dev->cdb_len; + + /* reference: SSTL 1.13.4.2 + * task_type, sata_direction + */ + if (task->data_dir == DMA_TO_DEVICE) { + task_context->task_type = SCU_TASK_TYPE_PACKET_DMA_OUT; + task_context->sata_direction = 0; + } else { + /* todo: for NO_DATA command, we need to send out raw frame. */ + task_context->task_type = SCU_TASK_TYPE_PACKET_DMA_IN; + task_context->sata_direction = 1; + } + + memset(&task_context->type.stp, 0, sizeof(task_context->type.stp)); + task_context->type.stp.fis_type = FIS_DATA; + + memset(&ireq->stp.cmd, 0, sizeof(ireq->stp.cmd)); + memcpy(&ireq->stp.cmd.lbal, task->ata_task.atapi_packet, cdb_len); + task_context->ssp_command_iu_length = cdb_len / sizeof(u32); + + /* task phase is set to TX_CMD */ + task_context->task_phase = 0x1; + + /* retry counter */ + task_context->stp_retry_count = 0; + + /* data transfer size. */ + task_context->transfer_length_bytes = task->total_xfer_len; + + /* setup sgl */ + sci_request_build_sgl(ireq); +} + enum sci_status sci_io_request_frame_handler(struct isci_request *ireq, u32 frame_index) @@ -1490,29 +1646,30 @@ sci_io_request_frame_handler(struct isci_request *ireq, return SCI_SUCCESS; case SCI_REQ_SMP_WAIT_RESP: { - struct smp_resp *rsp_hdr = &ireq->smp.rsp; - void *frame_header; + struct sas_task *task = isci_request_access_task(ireq); + struct scatterlist *sg = &task->smp_task.smp_resp; + void *frame_header, *kaddr; + u8 *rsp; sci_unsolicited_frame_control_get_header(&ihost->uf_control, - frame_index, - &frame_header); - - /* byte swap the header. */ - word_cnt = SMP_RESP_HDR_SZ / sizeof(u32); - sci_swab32_cpy(rsp_hdr, frame_header, word_cnt); + frame_index, + &frame_header); + kaddr = kmap_atomic(sg_page(sg), KM_IRQ0); + rsp = kaddr + sg->offset; + sci_swab32_cpy(rsp, frame_header, 1); - if (rsp_hdr->frame_type == SMP_RESPONSE) { + if (rsp[0] == SMP_RESPONSE) { void *smp_resp; sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, - frame_index, - &smp_resp); - - word_cnt = (sizeof(struct smp_resp) - SMP_RESP_HDR_SZ) / - sizeof(u32); + frame_index, + &smp_resp); - sci_swab32_cpy(((u8 *) rsp_hdr) + SMP_RESP_HDR_SZ, - smp_resp, word_cnt); + word_cnt = (sg->length/4)-1; + if (word_cnt > 0) + word_cnt = min_t(unsigned int, word_cnt, + SCU_UNSOLICITED_FRAME_BUFFER_SIZE/4); + sci_swab32_cpy(rsp + 4, smp_resp, word_cnt); ireq->scu_status = SCU_TASK_DONE_GOOD; ireq->sci_status = SCI_SUCCESS; @@ -1528,12 +1685,13 @@ sci_io_request_frame_handler(struct isci_request *ireq, __func__, ireq, frame_index, - rsp_hdr->frame_type); + rsp[0]); ireq->scu_status = SCU_TASK_DONE_SMP_FRM_TYPE_ERR; ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); } + kunmap_atomic(kaddr, KM_IRQ0); sci_controller_release_frame(ihost, frame_index); @@ -1833,6 +1991,24 @@ sci_io_request_frame_handler(struct isci_request *ireq, return status; } + case SCI_REQ_ATAPI_WAIT_PIO_SETUP: { + struct sas_task *task = isci_request_access_task(ireq); + + sci_controller_release_frame(ihost, frame_index); + ireq->target_device->working_request = ireq; + if (task->data_dir == DMA_NONE) { + sci_change_state(&ireq->sm, SCI_REQ_ATAPI_WAIT_TC_COMP); + scu_atapi_reconstruct_raw_frame_task_context(ireq); + } else { + sci_change_state(&ireq->sm, SCI_REQ_ATAPI_WAIT_D2H); + scu_atapi_construct_task_context(ireq); + } + + sci_controller_continue_io(ireq); + return SCI_SUCCESS; + } + case SCI_REQ_ATAPI_WAIT_D2H: + return atapi_d2h_reg_frame_handler(ireq, frame_index); case SCI_REQ_ABORTING: /* * TODO: Is it even possible to get an unsolicited frame in the @@ -1898,10 +2074,9 @@ static enum sci_status stp_request_udma_await_tc_event(struct isci_request *ireq case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR): case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_R_ERR): case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CMD_LL_R_ERR): - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CRC_ERR): sci_remote_device_suspend(ireq->target_device, SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code))); - /* Fall through to the default case */ + /* Fall through to the default case */ default: /* All other completion status cause the IO to be complete. */ ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); @@ -1964,6 +2139,112 @@ stp_request_soft_reset_await_h2d_diagnostic_tc_event(struct isci_request *ireq, return SCI_SUCCESS; } +static enum sci_status atapi_raw_completion(struct isci_request *ireq, u32 completion_code, + enum sci_base_request_states next) +{ + enum sci_status status = SCI_SUCCESS; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, next); + break; + default: + /* All other completion status cause the IO to be complete. + * If a NAK was received, then it is up to the user to retry + * the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return status; +} + +static enum sci_status atapi_data_tc_completion_handler(struct isci_request *ireq, + u32 completion_code) +{ + struct isci_remote_device *idev = ireq->target_device; + struct dev_to_host_fis *d2h = &ireq->stp.rsp; + enum sci_status status = SCI_SUCCESS; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT): + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + + case (SCU_TASK_DONE_UNEXP_FIS << SCU_COMPLETION_TL_STATUS_SHIFT): { + u16 len = sci_req_tx_bytes(ireq); + + /* likely non-error data underrrun, workaround missing + * d2h frame from the controller + */ + if (d2h->fis_type != FIS_REGD2H) { + d2h->fis_type = FIS_REGD2H; + d2h->flags = (1 << 6); + d2h->status = 0x50; + d2h->error = 0; + d2h->lbal = 0; + d2h->byte_count_low = len & 0xff; + d2h->byte_count_high = len >> 8; + d2h->device = 0xa0; + d2h->lbal_exp = 0; + d2h->lbam_exp = 0; + d2h->lbah_exp = 0; + d2h->_r_a = 0; + d2h->sector_count = 0x3; + d2h->sector_count_exp = 0; + d2h->_r_b = 0; + d2h->_r_c = 0; + d2h->_r_d = 0; + } + + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS_IO_DONE_EARLY; + status = ireq->sci_status; + + /* the hw will have suspended the rnc, so complete the + * request upon pending resume + */ + sci_change_state(&idev->sm, SCI_STP_DEV_ATAPI_ERROR); + break; + } + case (SCU_TASK_DONE_EXCESS_DATA << SCU_COMPLETION_TL_STATUS_SHIFT): + /* In this case, there is no UF coming after. + * compelte the IO now. + */ + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + + default: + if (d2h->fis_type == FIS_REGD2H) { + /* UF received change the device state to ATAPI_ERROR */ + status = ireq->sci_status; + sci_change_state(&idev->sm, SCI_STP_DEV_ATAPI_ERROR); + } else { + /* If receiving any non-sucess TC status, no UF + * received yet, then an UF for the status fis + * is coming after (XXX: suspect this is + * actually a protocol error or a bug like the + * DONE_UNEXP_FIS case) + */ + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + + sci_change_state(&ireq->sm, SCI_REQ_ATAPI_WAIT_D2H); + } + break; + } + + return status; +} + enum sci_status sci_io_request_tc_completion(struct isci_request *ireq, u32 completion_code) @@ -2015,6 +2296,17 @@ sci_io_request_tc_completion(struct isci_request *ireq, return request_aborting_state_tc_event(ireq, completion_code); + case SCI_REQ_ATAPI_WAIT_H2D: + return atapi_raw_completion(ireq, completion_code, + SCI_REQ_ATAPI_WAIT_PIO_SETUP); + + case SCI_REQ_ATAPI_WAIT_TC_COMP: + return atapi_raw_completion(ireq, completion_code, + SCI_REQ_ATAPI_WAIT_D2H); + + case SCI_REQ_ATAPI_WAIT_D2H: + return atapi_data_tc_completion_handler(ireq, completion_code); + default: dev_warn(&ihost->pdev->dev, "%s: SCIC IO Request given task completion " @@ -2421,6 +2713,8 @@ static void isci_process_stp_response(struct sas_task *task, struct dev_to_host_ */ if (fis->status & ATA_DF) ts->stat = SAS_PROTO_RESPONSE; + else if (fis->status & ATA_ERR) + ts->stat = SAM_STAT_CHECK_CONDITION; else ts->stat = SAM_STAT_GOOD; @@ -2603,18 +2897,7 @@ static void isci_request_io_request_complete(struct isci_host *ihost, status = SAM_STAT_GOOD; set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); - if (task->task_proto == SAS_PROTOCOL_SMP) { - void *rsp = &request->smp.rsp; - - dev_dbg(&ihost->pdev->dev, - "%s: SMP protocol completion\n", - __func__); - - sg_copy_from_buffer( - &task->smp_task.smp_resp, 1, - rsp, sizeof(struct smp_resp)); - } else if (completion_status - == SCI_IO_SUCCESS_IO_DONE_EARLY) { + if (completion_status == SCI_IO_SUCCESS_IO_DONE_EARLY) { /* This was an SSP / STP / SATA transfer. * There is a possibility that less data than @@ -2791,6 +3074,7 @@ static void sci_request_started_state_enter(struct sci_base_state_machine *sm) { struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); struct domain_device *dev = ireq->target_device->domain_dev; + enum sci_base_request_states state; struct sas_task *task; /* XXX as hch said always creating an internal sas_task for tmf @@ -2802,26 +3086,30 @@ static void sci_request_started_state_enter(struct sci_base_state_machine *sm) * substates */ if (!task && dev->dev_type == SAS_END_DEV) { - sci_change_state(sm, SCI_REQ_TASK_WAIT_TC_COMP); + state = SCI_REQ_TASK_WAIT_TC_COMP; } else if (!task && (isci_request_access_tmf(ireq)->tmf_code == isci_tmf_sata_srst_high || isci_request_access_tmf(ireq)->tmf_code == isci_tmf_sata_srst_low)) { - sci_change_state(sm, SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED); + state = SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED; } else if (task && task->task_proto == SAS_PROTOCOL_SMP) { - sci_change_state(sm, SCI_REQ_SMP_WAIT_RESP); + state = SCI_REQ_SMP_WAIT_RESP; } else if (task && sas_protocol_ata(task->task_proto) && !task->ata_task.use_ncq) { - u32 state; - - if (task->data_dir == DMA_NONE) + if (dev->sata_dev.command_set == ATAPI_COMMAND_SET && + task->ata_task.fis.command == ATA_CMD_PACKET) { + state = SCI_REQ_ATAPI_WAIT_H2D; + } else if (task->data_dir == DMA_NONE) { state = SCI_REQ_STP_NON_DATA_WAIT_H2D; - else if (task->ata_task.dma_xfer) + } else if (task->ata_task.dma_xfer) { state = SCI_REQ_STP_UDMA_WAIT_TC_COMP; - else /* PIO */ + } else /* PIO */ { state = SCI_REQ_STP_PIO_WAIT_H2D; - - sci_change_state(sm, state); + } + } else { + /* SSP or NCQ are fully accelerated, no substates */ + return; } + sci_change_state(sm, state); } static void sci_request_completed_state_enter(struct sci_base_state_machine *sm) @@ -2913,6 +3201,10 @@ static const struct sci_base_state sci_request_state_table[] = { [SCI_REQ_TASK_WAIT_TC_RESP] = { }, [SCI_REQ_SMP_WAIT_RESP] = { }, [SCI_REQ_SMP_WAIT_TC_COMP] = { }, + [SCI_REQ_ATAPI_WAIT_H2D] = { }, + [SCI_REQ_ATAPI_WAIT_PIO_SETUP] = { }, + [SCI_REQ_ATAPI_WAIT_D2H] = { }, + [SCI_REQ_ATAPI_WAIT_TC_COMP] = { }, [SCI_REQ_COMPLETED] = { .enter_state = sci_request_completed_state_enter, }, |