mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
[SCSI] Add SATA support to libsas
Hook the scsi_host_template functions in libsas to delegate functionality to libata when appropriate. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Misc code changes and merge fixes and update for libata->drivers/ata move Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Darrick J. Wong
James Bottomley
parent
8b4a40809e
commit
fa1c1e8f1e
4 changed files with 366 additions and 2 deletions
|
|
@ -81,6 +81,9 @@ static struct scsi_host_template aic94xx_sht = {
|
|||
.use_clustering = ENABLE_CLUSTERING,
|
||||
.eh_device_reset_handler = sas_eh_device_reset_handler,
|
||||
.eh_bus_reset_handler = sas_eh_bus_reset_handler,
|
||||
.slave_alloc = sas_slave_alloc,
|
||||
.target_destroy = sas_target_destroy,
|
||||
.ioctl = sas_ioctl,
|
||||
};
|
||||
|
||||
static int __devinit asd_map_memio(struct asd_ha_struct *asd_ha)
|
||||
|
|
|
|||
|
|
@ -255,6 +255,7 @@ static int sas_get_port_device(struct asd_sas_port *port)
|
|||
|
||||
switch (dev->dev_type) {
|
||||
case SAS_END_DEV:
|
||||
case SATA_DEV:
|
||||
rphy = sas_end_device_alloc(port->port);
|
||||
break;
|
||||
case EDGE_DEV:
|
||||
|
|
@ -265,7 +266,6 @@ static int sas_get_port_device(struct asd_sas_port *port)
|
|||
rphy = sas_expander_alloc(port->port,
|
||||
SAS_FANOUT_EXPANDER_DEVICE);
|
||||
break;
|
||||
case SATA_DEV:
|
||||
default:
|
||||
printk("ERROR: Unidentified device type %d\n", dev->dev_type);
|
||||
rphy = NULL;
|
||||
|
|
@ -480,7 +480,14 @@ static int sas_discover_sata_dev(struct domain_device *dev)
|
|||
present.
|
||||
sas_satl_register_dev(dev);
|
||||
*/
|
||||
return 0;
|
||||
|
||||
sas_fill_in_rphy(dev, dev->rphy);
|
||||
|
||||
res = sas_rphy_add(dev->rphy);
|
||||
if (res)
|
||||
goto out_err;
|
||||
|
||||
return res;
|
||||
out_err:
|
||||
dev->sata_dev.identify_packet_device = NULL;
|
||||
dev->sata_dev.identify_device = NULL;
|
||||
|
|
|
|||
|
|
@ -42,6 +42,7 @@
|
|||
#include <linux/blkdev.h>
|
||||
#include <linux/freezer.h>
|
||||
#include <linux/scatterlist.h>
|
||||
#include <linux/libata.h>
|
||||
|
||||
/* ---------- SCSI Host glue ---------- */
|
||||
|
||||
|
|
@ -192,6 +193,11 @@ static int sas_queue_up(struct sas_task *task)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static inline int dev_is_sata(struct domain_device *dev)
|
||||
{
|
||||
return (dev->rphy->identify.target_port_protocols & SAS_PROTOCOL_SATA);
|
||||
}
|
||||
|
||||
/**
|
||||
* sas_queuecommand -- Enqueue a command for processing
|
||||
* @parameters: See SCSI Core documentation
|
||||
|
|
@ -213,6 +219,12 @@ int sas_queuecommand(struct scsi_cmnd *cmd,
|
|||
struct sas_ha_struct *sas_ha = dev->port->ha;
|
||||
struct sas_task *task;
|
||||
|
||||
if (dev_is_sata(dev)) {
|
||||
res = ata_sas_queuecmd(cmd, scsi_done,
|
||||
dev->sata_dev.ap);
|
||||
goto out;
|
||||
}
|
||||
|
||||
res = -ENOMEM;
|
||||
task = sas_create_task(cmd, dev, GFP_ATOMIC);
|
||||
if (!task)
|
||||
|
|
@ -684,6 +696,279 @@ enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd)
|
|||
return EH_NOT_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
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:
|
||||
case SAS_PROTO_RESPONSE:
|
||||
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;
|
||||
|
||||
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 = qc->ap->private_data;
|
||||
struct task_status_struct *stat = &task->task_status;
|
||||
struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
|
||||
enum ata_completion_errors ac;
|
||||
|
||||
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;
|
||||
goto end;
|
||||
}
|
||||
|
||||
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;
|
||||
dev->sata_dev.ap->sactive = resp->sactive;
|
||||
end:
|
||||
ata_qc_complete(qc);
|
||||
list_del_init(&task->list);
|
||||
sas_free_task(task);
|
||||
}
|
||||
|
||||
int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
|
||||
{
|
||||
struct domain_device *dev = sdev_to_domain_dev(sdev);
|
||||
|
||||
if (dev_is_sata(dev))
|
||||
return ata_scsi_ioctl(sdev, cmd, arg);
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
|
||||
{
|
||||
int res = -ENOMEM;
|
||||
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)
|
||||
goto out;
|
||||
task->dev = dev;
|
||||
task->task_proto = SAS_PROTOCOL_STP;
|
||||
task->task_done = sas_ata_task_done;
|
||||
|
||||
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, ATAPI_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;
|
||||
|
||||
if (qc->tf.protocol == ATA_PROT_DMA)
|
||||
task->ata_task.dma_xfer = 1;
|
||||
|
||||
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);
|
||||
if (res == -SAS_QUEUE_FULL)
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
out:
|
||||
return res;
|
||||
}
|
||||
|
||||
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_ATA;
|
||||
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)
|
||||
SAS_DPRINTK("%s: Failure; reset phy!\n", __FUNCTION__);
|
||||
}
|
||||
|
||||
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,
|
||||
.pio_mask = 0x1f, /* PIO0-4 */
|
||||
.mwdma_mask = 0x07, /* MWDMA0-2 */
|
||||
.udma_mask = ATA_UDMA6,
|
||||
.port_ops = &sas_sata_ops
|
||||
};
|
||||
|
||||
struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
|
||||
{
|
||||
struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
|
||||
|
|
@ -722,11 +1007,33 @@ static inline struct domain_device *sas_find_target(struct scsi_target *starget)
|
|||
|
||||
int sas_target_alloc(struct scsi_target *starget)
|
||||
{
|
||||
struct Scsi_Host *shost = dev_to_shost(&starget->dev);
|
||||
struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
|
||||
struct domain_device *found_dev = sas_find_target(starget);
|
||||
|
||||
if (!found_dev)
|
||||
return -ENODEV;
|
||||
|
||||
if (dev_is_sata(found_dev)) {
|
||||
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;
|
||||
found_dev->sata_dev.ap = ap;
|
||||
}
|
||||
|
||||
starget->hostdata = found_dev;
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -741,6 +1048,11 @@ int sas_slave_configure(struct scsi_device *scsi_dev)
|
|||
|
||||
BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
|
||||
|
||||
if (dev_is_sata(dev)) {
|
||||
ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap);
|
||||
return 0;
|
||||
}
|
||||
|
||||
sas_ha = dev->port->ha;
|
||||
|
||||
sas_read_port_mode_page(scsi_dev);
|
||||
|
|
@ -764,6 +1076,10 @@ int sas_slave_configure(struct scsi_device *scsi_dev)
|
|||
|
||||
void sas_slave_destroy(struct scsi_device *scsi_dev)
|
||||
{
|
||||
struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
|
||||
|
||||
if (dev_is_sata(dev))
|
||||
ata_port_disable(dev->sata_dev.ap);
|
||||
}
|
||||
|
||||
int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth)
|
||||
|
|
@ -984,6 +1300,29 @@ void sas_task_abort(struct sas_task *task)
|
|||
scsi_schedule_eh(sc->device->host);
|
||||
}
|
||||
|
||||
int sas_slave_alloc(struct scsi_device *scsi_dev)
|
||||
{
|
||||
struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
|
||||
|
||||
if (dev_is_sata(dev))
|
||||
return ata_sas_port_init(dev->sata_dev.ap);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void sas_target_destroy(struct scsi_target *starget)
|
||||
{
|
||||
struct domain_device *found_dev = sas_find_target(starget);
|
||||
|
||||
if (!found_dev)
|
||||
return;
|
||||
|
||||
if (dev_is_sata(found_dev))
|
||||
ata_sas_port_destroy(found_dev->sata_dev.ap);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(sas_queuecommand);
|
||||
EXPORT_SYMBOL_GPL(sas_target_alloc);
|
||||
EXPORT_SYMBOL_GPL(sas_slave_configure);
|
||||
|
|
@ -997,3 +1336,6 @@ EXPORT_SYMBOL_GPL(sas_phy_reset);
|
|||
EXPORT_SYMBOL_GPL(sas_phy_enable);
|
||||
EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
|
||||
EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler);
|
||||
EXPORT_SYMBOL_GPL(sas_slave_alloc);
|
||||
EXPORT_SYMBOL_GPL(sas_target_destroy);
|
||||
EXPORT_SYMBOL_GPL(sas_ioctl);
|
||||
|
|
|
|||
|
|
@ -30,6 +30,7 @@
|
|||
#include <linux/timer.h>
|
||||
#include <linux/pci.h>
|
||||
#include <scsi/sas.h>
|
||||
#include <linux/libata.h>
|
||||
#include <linux/list.h>
|
||||
#include <asm/semaphore.h>
|
||||
#include <scsi/scsi_device.h>
|
||||
|
|
@ -165,6 +166,13 @@ struct sata_device {
|
|||
|
||||
u8 port_no; /* port number, if this is a PM (Port) */
|
||||
struct list_head children; /* PM Ports if this is a PM */
|
||||
|
||||
struct ata_port *ap;
|
||||
struct ata_host ata_host;
|
||||
struct ata_taskfile tf;
|
||||
u32 sstatus;
|
||||
u32 serror;
|
||||
u32 scontrol;
|
||||
};
|
||||
|
||||
/* ---------- Domain device ---------- */
|
||||
|
|
@ -661,4 +669,8 @@ int __sas_task_abort(struct sas_task *);
|
|||
int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
|
||||
int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
|
||||
|
||||
extern void sas_target_destroy(struct scsi_target *);
|
||||
extern int sas_slave_alloc(struct scsi_device *);
|
||||
extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
|
||||
|
||||
#endif /* _SASLIB_H_ */
|
||||
|
|
|
|||
Loading…
Reference in a new issue