2006-10-18 21:43:37 +00:00
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/*
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* Support for SATA devices on Serial Attached SCSI (SAS) controllers
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*
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* Copyright (C) 2006 IBM Corporation
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*
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* Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include <scsi/sas_ata.h>
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#include "sas_internal.h"
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_sas.h>
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#include "../scsi_sas_internal.h"
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static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
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{
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/* Cheesy attempt to translate SAS errors into ATA. Hah! */
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/* transport error */
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if (ts->resp == SAS_TASK_UNDELIVERED)
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return AC_ERR_ATA_BUS;
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/* ts->resp == SAS_TASK_COMPLETE */
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/* task delivered, what happened afterwards? */
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switch (ts->stat) {
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case SAS_DEV_NO_RESPONSE:
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return AC_ERR_TIMEOUT;
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case SAS_INTERRUPTED:
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case SAS_PHY_DOWN:
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case SAS_NAK_R_ERR:
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return AC_ERR_ATA_BUS;
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case SAS_DATA_UNDERRUN:
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/*
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* Some programs that use the taskfile interface
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* (smartctl in particular) can cause underrun
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* problems. Ignore these errors, perhaps at our
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* peril.
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*/
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return 0;
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case SAS_DATA_OVERRUN:
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case SAS_QUEUE_FULL:
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case SAS_DEVICE_UNKNOWN:
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case SAS_SG_ERR:
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return AC_ERR_INVALID;
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case SAM_CHECK_COND:
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case SAS_OPEN_TO:
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case SAS_OPEN_REJECT:
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SAS_DPRINTK("%s: Saw error %d. What to do?\n",
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__FUNCTION__, ts->stat);
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return AC_ERR_OTHER;
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case SAS_ABORTED_TASK:
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return AC_ERR_DEV;
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case SAS_PROTO_RESPONSE:
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/* This means the ending_fis has the error
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* value; return 0 here to collect it */
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return 0;
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default:
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return 0;
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}
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}
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static void sas_ata_task_done(struct sas_task *task)
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{
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struct ata_queued_cmd *qc = task->uldd_task;
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2007-01-30 09:18:41 +00:00
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struct domain_device *dev;
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2006-10-18 21:43:37 +00:00
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struct task_status_struct *stat = &task->task_status;
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struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
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enum ata_completion_errors ac;
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2007-01-30 09:18:35 +00:00
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unsigned long flags;
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2006-10-18 21:43:37 +00:00
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2007-01-30 09:18:41 +00:00
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if (!qc)
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goto qc_already_gone;
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dev = qc->ap->private_data;
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2007-01-30 09:18:35 +00:00
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spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
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2007-01-30 09:18:49 +00:00
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if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) {
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2006-10-18 21:43:37 +00:00
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ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
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qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
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dev->sata_dev.sstatus = resp->sstatus;
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dev->sata_dev.serror = resp->serror;
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dev->sata_dev.scontrol = resp->scontrol;
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} else if (stat->stat != SAM_STAT_GOOD) {
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ac = sas_to_ata_err(stat);
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if (ac) {
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SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__,
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stat->stat);
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/* We saw a SAS error. Send a vague error. */
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qc->err_mask = ac;
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dev->sata_dev.tf.feature = 0x04; /* status err */
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dev->sata_dev.tf.command = ATA_ERR;
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}
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}
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2007-01-30 09:18:41 +00:00
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qc->lldd_task = NULL;
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2006-10-18 21:43:37 +00:00
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ata_qc_complete(qc);
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2007-01-30 09:18:35 +00:00
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spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
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2007-01-30 09:18:41 +00:00
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qc_already_gone:
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2006-10-18 21:43:37 +00:00
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list_del_init(&task->list);
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sas_free_task(task);
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}
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static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
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{
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2007-01-30 09:18:38 +00:00
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int res;
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2006-10-18 21:43:37 +00:00
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struct sas_task *task;
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struct domain_device *dev = qc->ap->private_data;
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struct sas_ha_struct *sas_ha = dev->port->ha;
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struct Scsi_Host *host = sas_ha->core.shost;
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struct sas_internal *i = to_sas_internal(host->transportt);
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struct scatterlist *sg;
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unsigned int num = 0;
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unsigned int xfer = 0;
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task = sas_alloc_task(GFP_ATOMIC);
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if (!task)
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2007-01-30 09:18:38 +00:00
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return AC_ERR_SYSTEM;
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2006-10-18 21:43:37 +00:00
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task->dev = dev;
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task->task_proto = SAS_PROTOCOL_STP;
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task->task_done = sas_ata_task_done;
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if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
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qc->tf.command == ATA_CMD_FPDMA_READ) {
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/* Need to zero out the tag libata assigned us */
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qc->tf.nsect = 0;
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}
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ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
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task->uldd_task = qc;
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if (is_atapi_taskfile(&qc->tf)) {
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memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
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task->total_xfer_len = qc->nbytes + qc->pad_len;
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task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
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} else {
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ata_for_each_sg(sg, qc) {
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num++;
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xfer += sg->length;
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}
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task->total_xfer_len = xfer;
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task->num_scatter = num;
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}
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task->data_dir = qc->dma_dir;
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task->scatter = qc->__sg;
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task->ata_task.retry_count = 1;
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task->task_state_flags = SAS_TASK_STATE_PENDING;
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2007-01-30 09:18:41 +00:00
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qc->lldd_task = task;
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2006-10-18 21:43:37 +00:00
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switch (qc->tf.protocol) {
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case ATA_PROT_NCQ:
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task->ata_task.use_ncq = 1;
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/* fall through */
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case ATA_PROT_ATAPI_DMA:
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case ATA_PROT_DMA:
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task->ata_task.dma_xfer = 1;
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break;
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}
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if (sas_ha->lldd_max_execute_num < 2)
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res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
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else
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res = sas_queue_up(task);
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/* Examine */
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if (res) {
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SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
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sas_free_task(task);
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2007-01-30 09:18:38 +00:00
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return AC_ERR_SYSTEM;
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2006-10-18 21:43:37 +00:00
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}
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2007-01-30 09:18:38 +00:00
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return 0;
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2006-10-18 21:43:37 +00:00
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}
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static u8 sas_ata_check_status(struct ata_port *ap)
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{
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struct domain_device *dev = ap->private_data;
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return dev->sata_dev.tf.command;
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}
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static void sas_ata_phy_reset(struct ata_port *ap)
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{
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struct domain_device *dev = ap->private_data;
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struct sas_internal *i =
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to_sas_internal(dev->port->ha->core.shost->transportt);
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int res = 0;
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if (i->dft->lldd_I_T_nexus_reset)
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res = i->dft->lldd_I_T_nexus_reset(dev);
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if (res)
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SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);
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switch (dev->sata_dev.command_set) {
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case ATA_COMMAND_SET:
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SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
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ap->device[0].class = ATA_DEV_ATA;
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break;
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case ATAPI_COMMAND_SET:
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SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
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ap->device[0].class = ATA_DEV_ATAPI;
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break;
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default:
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SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
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__FUNCTION__,
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dev->sata_dev.command_set);
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2007-01-30 09:18:52 +00:00
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ap->device[0].class = ATA_DEV_UNKNOWN;
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2006-10-18 21:43:37 +00:00
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break;
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}
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ap->cbl = ATA_CBL_SATA;
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}
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static void sas_ata_post_internal(struct ata_queued_cmd *qc)
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{
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if (qc->flags & ATA_QCFLAG_FAILED)
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qc->err_mask |= AC_ERR_OTHER;
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2007-01-30 09:18:41 +00:00
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if (qc->err_mask) {
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/*
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* Find the sas_task and kill it. By this point,
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* libata has decided to kill the qc, so we needn't
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* bother with sas_ata_task_done. But we still
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* ought to abort the task.
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*/
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struct sas_task *task = qc->lldd_task;
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struct domain_device *dev = qc->ap->private_data;
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qc->lldd_task = NULL;
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if (task) {
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task->uldd_task = NULL;
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__sas_task_abort(task);
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}
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sas_phy_reset(dev->port->phy, 1);
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}
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2006-10-18 21:43:37 +00:00
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}
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static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
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{
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struct domain_device *dev = ap->private_data;
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memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
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}
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static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
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u32 val)
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{
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struct domain_device *dev = ap->private_data;
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SAS_DPRINTK("STUB %s\n", __FUNCTION__);
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switch (sc_reg_in) {
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case SCR_STATUS:
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dev->sata_dev.sstatus = val;
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break;
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case SCR_CONTROL:
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dev->sata_dev.scontrol = val;
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break;
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case SCR_ERROR:
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dev->sata_dev.serror = val;
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break;
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case SCR_ACTIVE:
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dev->sata_dev.ap->sactive = val;
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break;
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}
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}
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static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
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{
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struct domain_device *dev = ap->private_data;
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SAS_DPRINTK("STUB %s\n", __FUNCTION__);
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switch (sc_reg_in) {
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case SCR_STATUS:
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return dev->sata_dev.sstatus;
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case SCR_CONTROL:
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return dev->sata_dev.scontrol;
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case SCR_ERROR:
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return dev->sata_dev.serror;
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case SCR_ACTIVE:
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return dev->sata_dev.ap->sactive;
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default:
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return 0xffffffffU;
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}
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}
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static struct ata_port_operations sas_sata_ops = {
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.port_disable = ata_port_disable,
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.check_status = sas_ata_check_status,
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.check_altstatus = sas_ata_check_status,
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.dev_select = ata_noop_dev_select,
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.phy_reset = sas_ata_phy_reset,
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.post_internal_cmd = sas_ata_post_internal,
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.tf_read = sas_ata_tf_read,
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.qc_prep = ata_noop_qc_prep,
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.qc_issue = sas_ata_qc_issue,
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.port_start = ata_sas_port_start,
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.port_stop = ata_sas_port_stop,
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.scr_read = sas_ata_scr_read,
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.scr_write = sas_ata_scr_write
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};
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static struct ata_port_info sata_port_info = {
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.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET |
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ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
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.pio_mask = 0x1f, /* PIO0-4 */
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.mwdma_mask = 0x07, /* MWDMA0-2 */
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.udma_mask = ATA_UDMA6,
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.port_ops = &sas_sata_ops
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};
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int sas_ata_init_host_and_port(struct domain_device *found_dev,
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|
|
struct scsi_target *starget)
|
|
|
|
{
|
|
|
|
struct Scsi_Host *shost = dev_to_shost(&starget->dev);
|
|
|
|
struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
|
|
|
|
struct ata_port *ap;
|
|
|
|
|
|
|
|
ata_host_init(&found_dev->sata_dev.ata_host,
|
|
|
|
&ha->pcidev->dev,
|
|
|
|
sata_port_info.flags,
|
|
|
|
&sas_sata_ops);
|
|
|
|
ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
|
|
|
|
&sata_port_info,
|
|
|
|
shost);
|
|
|
|
if (!ap) {
|
|
|
|
SAS_DPRINTK("ata_sas_port_alloc failed.\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
ap->private_data = found_dev;
|
|
|
|
ap->cbl = ATA_CBL_SATA;
|
|
|
|
ap->scsi_host = shost;
|
|
|
|
found_dev->sata_dev.ap = ap;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|