5986c3d305
When libsas encounters a STP device whose protocol isn't recognized (i.e. not ATA or ATAPI), we should set the ata_device's class to ATA_DEV_UNKNOWN instead of ATA_DEV_ATA. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
365 lines
9.3 KiB
C
365 lines
9.3 KiB
C
/*
|
|
* Support for SATA devices on Serial Attached SCSI (SAS) controllers
|
|
*
|
|
* Copyright (C) 2006 IBM Corporation
|
|
*
|
|
* Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
* USA
|
|
*/
|
|
|
|
#include <scsi/sas_ata.h>
|
|
#include "sas_internal.h"
|
|
#include <scsi/scsi_host.h>
|
|
#include <scsi/scsi_device.h>
|
|
#include <scsi/scsi_tcq.h>
|
|
#include <scsi/scsi.h>
|
|
#include <scsi/scsi_transport.h>
|
|
#include <scsi/scsi_transport_sas.h>
|
|
#include "../scsi_sas_internal.h"
|
|
|
|
static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
|
|
{
|
|
/* Cheesy attempt to translate SAS errors into ATA. Hah! */
|
|
|
|
/* transport error */
|
|
if (ts->resp == SAS_TASK_UNDELIVERED)
|
|
return AC_ERR_ATA_BUS;
|
|
|
|
/* ts->resp == SAS_TASK_COMPLETE */
|
|
/* task delivered, what happened afterwards? */
|
|
switch (ts->stat) {
|
|
case SAS_DEV_NO_RESPONSE:
|
|
return AC_ERR_TIMEOUT;
|
|
|
|
case SAS_INTERRUPTED:
|
|
case SAS_PHY_DOWN:
|
|
case SAS_NAK_R_ERR:
|
|
return AC_ERR_ATA_BUS;
|
|
|
|
|
|
case SAS_DATA_UNDERRUN:
|
|
/*
|
|
* Some programs that use the taskfile interface
|
|
* (smartctl in particular) can cause underrun
|
|
* problems. Ignore these errors, perhaps at our
|
|
* peril.
|
|
*/
|
|
return 0;
|
|
|
|
case SAS_DATA_OVERRUN:
|
|
case SAS_QUEUE_FULL:
|
|
case SAS_DEVICE_UNKNOWN:
|
|
case SAS_SG_ERR:
|
|
return AC_ERR_INVALID;
|
|
|
|
case SAM_CHECK_COND:
|
|
case SAS_OPEN_TO:
|
|
case SAS_OPEN_REJECT:
|
|
SAS_DPRINTK("%s: Saw error %d. What to do?\n",
|
|
__FUNCTION__, ts->stat);
|
|
return AC_ERR_OTHER;
|
|
|
|
case SAS_ABORTED_TASK:
|
|
return AC_ERR_DEV;
|
|
|
|
case SAS_PROTO_RESPONSE:
|
|
/* This means the ending_fis has the error
|
|
* value; return 0 here to collect it */
|
|
return 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void sas_ata_task_done(struct sas_task *task)
|
|
{
|
|
struct ata_queued_cmd *qc = task->uldd_task;
|
|
struct domain_device *dev;
|
|
struct task_status_struct *stat = &task->task_status;
|
|
struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
|
|
enum ata_completion_errors ac;
|
|
unsigned long flags;
|
|
|
|
if (!qc)
|
|
goto qc_already_gone;
|
|
|
|
dev = qc->ap->private_data;
|
|
|
|
spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
|
|
if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) {
|
|
ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
|
|
qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
|
|
dev->sata_dev.sstatus = resp->sstatus;
|
|
dev->sata_dev.serror = resp->serror;
|
|
dev->sata_dev.scontrol = resp->scontrol;
|
|
} else if (stat->stat != SAM_STAT_GOOD) {
|
|
ac = sas_to_ata_err(stat);
|
|
if (ac) {
|
|
SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__,
|
|
stat->stat);
|
|
/* We saw a SAS error. Send a vague error. */
|
|
qc->err_mask = ac;
|
|
dev->sata_dev.tf.feature = 0x04; /* status err */
|
|
dev->sata_dev.tf.command = ATA_ERR;
|
|
}
|
|
}
|
|
|
|
qc->lldd_task = NULL;
|
|
ata_qc_complete(qc);
|
|
spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
|
|
|
|
qc_already_gone:
|
|
list_del_init(&task->list);
|
|
sas_free_task(task);
|
|
}
|
|
|
|
static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
|
|
{
|
|
int res;
|
|
struct sas_task *task;
|
|
struct domain_device *dev = qc->ap->private_data;
|
|
struct sas_ha_struct *sas_ha = dev->port->ha;
|
|
struct Scsi_Host *host = sas_ha->core.shost;
|
|
struct sas_internal *i = to_sas_internal(host->transportt);
|
|
struct scatterlist *sg;
|
|
unsigned int num = 0;
|
|
unsigned int xfer = 0;
|
|
|
|
task = sas_alloc_task(GFP_ATOMIC);
|
|
if (!task)
|
|
return AC_ERR_SYSTEM;
|
|
task->dev = dev;
|
|
task->task_proto = SAS_PROTOCOL_STP;
|
|
task->task_done = sas_ata_task_done;
|
|
|
|
if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
|
|
qc->tf.command == ATA_CMD_FPDMA_READ) {
|
|
/* Need to zero out the tag libata assigned us */
|
|
qc->tf.nsect = 0;
|
|
}
|
|
|
|
ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
|
|
task->uldd_task = qc;
|
|
if (is_atapi_taskfile(&qc->tf)) {
|
|
memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
|
|
task->total_xfer_len = qc->nbytes + qc->pad_len;
|
|
task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
|
|
} else {
|
|
ata_for_each_sg(sg, qc) {
|
|
num++;
|
|
xfer += sg->length;
|
|
}
|
|
|
|
task->total_xfer_len = xfer;
|
|
task->num_scatter = num;
|
|
}
|
|
|
|
task->data_dir = qc->dma_dir;
|
|
task->scatter = qc->__sg;
|
|
task->ata_task.retry_count = 1;
|
|
task->task_state_flags = SAS_TASK_STATE_PENDING;
|
|
qc->lldd_task = task;
|
|
|
|
switch (qc->tf.protocol) {
|
|
case ATA_PROT_NCQ:
|
|
task->ata_task.use_ncq = 1;
|
|
/* fall through */
|
|
case ATA_PROT_ATAPI_DMA:
|
|
case ATA_PROT_DMA:
|
|
task->ata_task.dma_xfer = 1;
|
|
break;
|
|
}
|
|
|
|
if (sas_ha->lldd_max_execute_num < 2)
|
|
res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
|
|
else
|
|
res = sas_queue_up(task);
|
|
|
|
/* Examine */
|
|
if (res) {
|
|
SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
|
|
|
|
sas_free_task(task);
|
|
return AC_ERR_SYSTEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u8 sas_ata_check_status(struct ata_port *ap)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
return dev->sata_dev.tf.command;
|
|
}
|
|
|
|
static void sas_ata_phy_reset(struct ata_port *ap)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
struct sas_internal *i =
|
|
to_sas_internal(dev->port->ha->core.shost->transportt);
|
|
int res = 0;
|
|
|
|
if (i->dft->lldd_I_T_nexus_reset)
|
|
res = i->dft->lldd_I_T_nexus_reset(dev);
|
|
|
|
if (res)
|
|
SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);
|
|
|
|
switch (dev->sata_dev.command_set) {
|
|
case ATA_COMMAND_SET:
|
|
SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
|
|
ap->device[0].class = ATA_DEV_ATA;
|
|
break;
|
|
case ATAPI_COMMAND_SET:
|
|
SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
|
|
ap->device[0].class = ATA_DEV_ATAPI;
|
|
break;
|
|
default:
|
|
SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
|
|
__FUNCTION__,
|
|
dev->sata_dev.command_set);
|
|
ap->device[0].class = ATA_DEV_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
ap->cbl = ATA_CBL_SATA;
|
|
}
|
|
|
|
static void sas_ata_post_internal(struct ata_queued_cmd *qc)
|
|
{
|
|
if (qc->flags & ATA_QCFLAG_FAILED)
|
|
qc->err_mask |= AC_ERR_OTHER;
|
|
|
|
if (qc->err_mask) {
|
|
/*
|
|
* Find the sas_task and kill it. By this point,
|
|
* libata has decided to kill the qc, so we needn't
|
|
* bother with sas_ata_task_done. But we still
|
|
* ought to abort the task.
|
|
*/
|
|
struct sas_task *task = qc->lldd_task;
|
|
struct domain_device *dev = qc->ap->private_data;
|
|
|
|
qc->lldd_task = NULL;
|
|
if (task) {
|
|
task->uldd_task = NULL;
|
|
__sas_task_abort(task);
|
|
}
|
|
|
|
sas_phy_reset(dev->port->phy, 1);
|
|
}
|
|
}
|
|
|
|
static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
|
|
}
|
|
|
|
static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
|
|
u32 val)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
|
|
SAS_DPRINTK("STUB %s\n", __FUNCTION__);
|
|
switch (sc_reg_in) {
|
|
case SCR_STATUS:
|
|
dev->sata_dev.sstatus = val;
|
|
break;
|
|
case SCR_CONTROL:
|
|
dev->sata_dev.scontrol = val;
|
|
break;
|
|
case SCR_ERROR:
|
|
dev->sata_dev.serror = val;
|
|
break;
|
|
case SCR_ACTIVE:
|
|
dev->sata_dev.ap->sactive = val;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
|
|
SAS_DPRINTK("STUB %s\n", __FUNCTION__);
|
|
switch (sc_reg_in) {
|
|
case SCR_STATUS:
|
|
return dev->sata_dev.sstatus;
|
|
case SCR_CONTROL:
|
|
return dev->sata_dev.scontrol;
|
|
case SCR_ERROR:
|
|
return dev->sata_dev.serror;
|
|
case SCR_ACTIVE:
|
|
return dev->sata_dev.ap->sactive;
|
|
default:
|
|
return 0xffffffffU;
|
|
}
|
|
}
|
|
|
|
static struct ata_port_operations sas_sata_ops = {
|
|
.port_disable = ata_port_disable,
|
|
.check_status = sas_ata_check_status,
|
|
.check_altstatus = sas_ata_check_status,
|
|
.dev_select = ata_noop_dev_select,
|
|
.phy_reset = sas_ata_phy_reset,
|
|
.post_internal_cmd = sas_ata_post_internal,
|
|
.tf_read = sas_ata_tf_read,
|
|
.qc_prep = ata_noop_qc_prep,
|
|
.qc_issue = sas_ata_qc_issue,
|
|
.port_start = ata_sas_port_start,
|
|
.port_stop = ata_sas_port_stop,
|
|
.scr_read = sas_ata_scr_read,
|
|
.scr_write = sas_ata_scr_write
|
|
};
|
|
|
|
static struct ata_port_info sata_port_info = {
|
|
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET |
|
|
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
|
|
.pio_mask = 0x1f, /* PIO0-4 */
|
|
.mwdma_mask = 0x07, /* MWDMA0-2 */
|
|
.udma_mask = ATA_UDMA6,
|
|
.port_ops = &sas_sata_ops
|
|
};
|
|
|
|
int sas_ata_init_host_and_port(struct domain_device *found_dev,
|
|
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;
|
|
}
|