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scsi: avoid ->change_queue_depth indirection for queue full tracking 

All drivers use the implementation for ramping the queue up and down, so
instead of overloading the change_queue_depth method call the
implementation diretly if the driver opts into it by setting the
track_queue_depth flag in the host template.

Note that a few drivers validated the new queue depth in their
change_queue_depth method, but as we never go over the queue depth
set during slave_configure or the sysfs file this isn't nessecary
and can safely be removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Venkatesh Srinivas <venkateshs@google.com>
This commit is contained in:
Christoph Hellwig 2014-11-13 14:25:11 +01:00
parent 89dac7bb3b
commit c40ecc12cf
30 changed files with 73 additions and 244 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/infiniband/ulp/iser/iscsi_iser.c
View File

@ -922,6 +922,7 @@ static struct scsi_host_template iscsi_iser_sht = {
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "iscsi_iser",
.this_id = -1,
.track_queue_depth = 1,
};
static struct iscsi_transport iscsi_iser_transport = {

20
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -2402,7 +2402,7 @@ static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event)
* srp_change_queue_depth - setting device queue depth
* @sdev: scsi device struct
* @qdepth: requested queue depth
* @reason: SCSI_QDEPTH_DEFAULT/SCSI_QDEPTH_QFULL/SCSI_QDEPTH_RAMP_UP
* @reason: SCSI_QDEPTH_DEFAULT
* (see include/scsi/scsi_host.h for definition)
*
* Returns queue depth.
@ -2412,18 +2412,13 @@ srp_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
struct Scsi_Host *shost = sdev->host;
int max_depth;
if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP) {
max_depth = shost->can_queue;
if (!sdev->tagged_supported)
max_depth = 1;
if (qdepth > max_depth)
qdepth = max_depth;
scsi_adjust_queue_depth(sdev, qdepth);
} else if (reason == SCSI_QDEPTH_QFULL)
scsi_track_queue_full(sdev, qdepth);
else
return -EOPNOTSUPP;
max_depth = shost->can_queue;
if (!sdev->tagged_supported)
max_depth = 1;
if (qdepth > max_depth)
qdepth = max_depth;
scsi_adjust_queue_depth(sdev, qdepth);
return sdev->queue_depth;
}
@ -2766,6 +2761,7 @@ static struct scsi_host_template srp_template = {
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = srp_host_attrs,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static int srp_sdev_count(struct Scsi_Host *host)

15
drivers/s390/scsi/zfcp_scsi.c
View File

@ -35,19 +35,7 @@ MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs");
static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
int reason)
{
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
scsi_adjust_queue_depth(sdev, depth);
break;
case SCSI_QDEPTH_QFULL:
scsi_track_queue_full(sdev, depth);
break;
case SCSI_QDEPTH_RAMP_UP:
scsi_adjust_queue_depth(sdev, depth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, depth);
return sdev->queue_depth;
}
@ -320,6 +308,7 @@ static struct scsi_host_template zfcp_scsi_host_template = {
.use_clustering = 1,
.shost_attrs = zfcp_sysfs_shost_attrs,
.sdev_attrs = zfcp_sysfs_sdev_attrs,
.track_queue_depth = 1,
};
/**

1
drivers/scsi/aic94xx/aic94xx_init.c
View File

@ -84,6 +84,7 @@ static struct scsi_host_template aic94xx_sht = {
.target_destroy = sas_target_destroy,
.ioctl = sas_ioctl,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static int asd_map_memio(struct asd_ha_struct *asd_ha)

2
drivers/scsi/be2iscsi/be_main.c
View File

@ -570,7 +570,7 @@ static struct scsi_host_template beiscsi_sht = {
.cmd_per_lun = BEISCSI_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.vendor_id = SCSI_NL_VID_TYPE_PCI | BE_VENDOR_ID,
.track_queue_depth = 1,
};
static struct scsi_transport_template *beiscsi_scsi_transport;

1
drivers/scsi/bnx2fc/bnx2fc_fcoe.c
View File

@ -2792,6 +2792,7 @@ static struct scsi_host_template bnx2fc_shost_template = {
.sg_tablesize = BNX2FC_MAX_BDS_PER_CMD,
.max_sectors = 1024,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static struct libfc_function_template bnx2fc_libfc_fcn_templ = {

1
drivers/scsi/bnx2i/bnx2i_iscsi.c
View File

@ -2268,6 +2268,7 @@ static struct scsi_host_template bnx2i_host_template = {
.use_clustering = ENABLE_CLUSTERING,
.sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
.shost_attrs = bnx2i_dev_attributes,
.track_queue_depth = 1,
};
struct iscsi_transport bnx2i_iscsi_transport = {

1
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
View File

@ -96,6 +96,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.this_id = -1,
.track_queue_depth = 1,
};
static struct iscsi_transport cxgb3i_iscsi_transport = {

1
drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
View File

@ -99,6 +99,7 @@ static struct scsi_host_template cxgb4i_host_template = {
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.this_id = -1,
.track_queue_depth = 1,
};
static struct iscsi_transport cxgb4i_iscsi_transport = {

1
drivers/scsi/fcoe/fcoe.c
View File

@ -289,6 +289,7 @@ static struct scsi_host_template fcoe_shost_template = {
.sg_tablesize = SG_ALL,
.max_sectors = 0xffff,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
/**

1
drivers/scsi/fnic/fnic_main.c
View File

@ -120,6 +120,7 @@ static struct scsi_host_template fnic_host_template = {
.max_sectors = 0xffff,
.shost_attrs = fnic_attrs,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static void

1
drivers/scsi/ibmvscsi/ibmvfc.c
View File

@ -3103,6 +3103,7 @@ static struct scsi_host_template driver_template = {
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = ibmvfc_attrs,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
/**

1
drivers/scsi/isci/init.c
View File

@ -173,6 +173,7 @@ static struct scsi_host_template isci_sht = {
.ioctl = sas_ioctl,
.shost_attrs = isci_host_attrs,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static struct sas_domain_function_template isci_transport_ops = {

1
drivers/scsi/iscsi_tcp.c
View File

@ -966,6 +966,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
.target_alloc = iscsi_target_alloc,
.proc_name = "iscsi_tcp",
.this_id = -1,
.track_queue_depth = 1,
};
static struct iscsi_transport iscsi_sw_tcp_transport = {

14
drivers/scsi/libfc/fc_fcp.c
View File

@ -2173,19 +2173,7 @@ EXPORT_SYMBOL(fc_slave_alloc);
*/
int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
scsi_adjust_queue_depth(sdev, qdepth);
break;
case SCSI_QDEPTH_QFULL:
scsi_track_queue_full(sdev, qdepth);
break;
case SCSI_QDEPTH_RAMP_UP:
scsi_adjust_queue_depth(sdev, qdepth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, qdepth);
return sdev->queue_depth;
}
EXPORT_SYMBOL(fc_change_queue_depth);

14
drivers/scsi/libiscsi.c
View File

@ -1773,19 +1773,7 @@ EXPORT_SYMBOL_GPL(iscsi_queuecommand);
int iscsi_change_queue_depth(struct scsi_device *sdev, int depth, int reason)
{
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
scsi_adjust_queue_depth(sdev, depth);
break;
case SCSI_QDEPTH_QFULL:
scsi_track_queue_full(sdev, depth);
break;
case SCSI_QDEPTH_RAMP_UP:
scsi_adjust_queue_depth(sdev, depth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, depth);
return sdev->queue_depth;
}
EXPORT_SYMBOL_GPL(iscsi_change_queue_depth);

17
drivers/scsi/libsas/sas_scsi_host.c
View File

@ -961,20 +961,9 @@ int sas_change_queue_depth(struct scsi_device *sdev, int depth, int reason)
return __ata_change_queue_depth(dev->sata_dev.ap, sdev, depth,
reason);
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
case SCSI_QDEPTH_RAMP_UP:
if (!sdev->tagged_supported)
depth = 1;
scsi_adjust_queue_depth(sdev, depth);
break;
case SCSI_QDEPTH_QFULL:
scsi_track_queue_full(sdev, depth);
break;
default:
return -EOPNOTSUPP;
}
if (!sdev->tagged_supported)
depth = 1;
scsi_adjust_queue_depth(sdev, depth);
return depth;
}

23
drivers/scsi/lpfc/lpfc_scsi.c
View File

@ -255,26 +255,7 @@ lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
static int
lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
/* change request from sysfs, fall through */
case SCSI_QDEPTH_RAMP_UP:
scsi_adjust_queue_depth(sdev, qdepth);
break;
case SCSI_QDEPTH_QFULL:
if (scsi_track_queue_full(sdev, qdepth) == 0)
return sdev->queue_depth;
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0711 detected queue full - lun queue "
"depth adjusted to %d.\n", sdev->queue_depth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, qdepth);
return sdev->queue_depth;
}
@ -5918,6 +5899,7 @@ struct scsi_host_template lpfc_template = {
.change_queue_depth = lpfc_change_queue_depth,
.change_queue_type = scsi_change_queue_type,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
struct scsi_host_template lpfc_vport_template = {
@ -5942,4 +5924,5 @@ struct scsi_host_template lpfc_vport_template = {
.change_queue_depth = lpfc_change_queue_depth,
.change_queue_type = scsi_change_queue_type,
.use_blk_tags = 1,
.track_queue_depth = 1,
};

10
drivers/scsi/mpt2sas/mpt2sas_scsih.c
View File

@ -1229,7 +1229,7 @@ _scsih_adjust_queue_depth(struct scsi_device *sdev, int qdepth)
* _scsih_change_queue_depth - setting device queue depth
* @sdev: scsi device struct
* @qdepth: requested queue depth
* @reason: SCSI_QDEPTH_DEFAULT/SCSI_QDEPTH_QFULL/SCSI_QDEPTH_RAMP_UP
* @reason: SCSI_QDEPTH_DEFAULT
* (see include/scsi/scsi_host.h for definition)
*
* Returns queue depth.
@ -1237,12 +1237,7 @@ _scsih_adjust_queue_depth(struct scsi_device *sdev, int qdepth)
static int
_scsih_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP)
_scsih_adjust_queue_depth(sdev, qdepth);
else if (reason == SCSI_QDEPTH_QFULL)
scsi_track_queue_full(sdev, qdepth);
else
return -EOPNOTSUPP;
_scsih_adjust_queue_depth(sdev, qdepth);
if (sdev->inquiry_len > 7)
sdev_printk(KERN_INFO, sdev, "qdepth(%d), tagged(%d), "
@ -7637,6 +7632,7 @@ static struct scsi_host_template scsih_driver_template = {
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = mpt2sas_host_attrs,
.sdev_attrs = mpt2sas_dev_attrs,
.track_queue_depth = 1,
};
/**

10
drivers/scsi/mpt3sas/mpt3sas_scsih.c
View File

@ -1097,7 +1097,7 @@ _scsih_adjust_queue_depth(struct scsi_device *sdev, int qdepth)
* _scsih_change_queue_depth - setting device queue depth
* @sdev: scsi device struct
* @qdepth: requested queue depth
* @reason: SCSI_QDEPTH_DEFAULT/SCSI_QDEPTH_QFULL/SCSI_QDEPTH_RAMP_UP
* @reason: SCSI_QDEPTH_DEFAULT
* (see include/scsi/scsi_host.h for definition)
*
* Returns queue depth.
@ -1105,12 +1105,7 @@ _scsih_adjust_queue_depth(struct scsi_device *sdev, int qdepth)
static int
_scsih_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP)
_scsih_adjust_queue_depth(sdev, qdepth);
else if (reason == SCSI_QDEPTH_QFULL)
scsi_track_queue_full(sdev, qdepth);
else
return -EOPNOTSUPP;
_scsih_adjust_queue_depth(sdev, qdepth);
if (sdev->inquiry_len > 7)
sdev_printk(KERN_INFO, sdev, "qdepth(%d), tagged(%d), " \
@ -7266,6 +7261,7 @@ static struct scsi_host_template scsih_driver_template = {
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = mpt3sas_host_attrs,
.sdev_attrs = mpt3sas_dev_attrs,
.track_queue_depth = 1,
};
/**

1
drivers/scsi/mvsas/mv_init.c
View File

@ -77,6 +77,7 @@ static struct scsi_host_template mvs_sht = {
.ioctl = sas_ioctl,
.shost_attrs = mvst_host_attrs,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static struct sas_domain_function_template mvs_transport_ops = {

1
drivers/scsi/pm8001/pm8001_init.c
View File

@ -90,6 +90,7 @@ static struct scsi_host_template pm8001_sht = {
.ioctl = sas_ioctl,
.shost_attrs = pm8001_host_attrs,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
/**

48
drivers/scsi/qla2xxx/qla_os.c
View File

@ -270,6 +270,7 @@ struct scsi_host_template qla2xxx_driver_template = {
.supported_mode = MODE_INITIATOR,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static struct scsi_transport_template *qla2xxx_transport_template = NULL;
@ -1415,55 +1416,10 @@ qla2xxx_slave_destroy(struct scsi_device *sdev)
sdev->hostdata = NULL;
}
static void qla2x00_handle_queue_full(struct scsi_device *sdev, int qdepth)
{
fc_port_t *fcport = (struct fc_port *) sdev->hostdata;
if (!scsi_track_queue_full(sdev, qdepth))
return;
ql_dbg(ql_dbg_io, fcport->vha, 0x3029,
"Queue depth adjusted-down to %d for nexus=%ld:%d:%llu.\n",
sdev->queue_depth, fcport->vha->host_no, sdev->id, sdev->lun);
}
static void qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, int qdepth)
{
fc_port_t *fcport = sdev->hostdata;
struct scsi_qla_host *vha = fcport->vha;
struct req_que *req = NULL;
req = vha->req;
if (!req)
return;
if (req->max_q_depth <= sdev->queue_depth || req->max_q_depth < qdepth)
return;
scsi_adjust_queue_depth(sdev, qdepth);
ql_dbg(ql_dbg_io, vha, 0x302a,
"Queue depth adjusted-up to %d for nexus=%ld:%d:%llu.\n",
sdev->queue_depth, fcport->vha->host_no, sdev->id, sdev->lun);
}
static int
qla2x00_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
scsi_adjust_queue_depth(sdev, qdepth);
break;
case SCSI_QDEPTH_QFULL:
qla2x00_handle_queue_full(sdev, qdepth);
break;
case SCSI_QDEPTH_RAMP_UP:
qla2x00_adjust_sdev_qdepth_up(sdev, qdepth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, qdepth);
return sdev->queue_depth;
}

16
drivers/scsi/qla4xxx/ql4_os.c
View File

@ -164,8 +164,6 @@ static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
static int qla4xxx_slave_alloc(struct scsi_device *device);
static umode_t qla4_attr_is_visible(int param_type, int param);
static int qla4xxx_host_reset(struct Scsi_Host *shost, int reset_type);
static int qla4xxx_change_queue_depth(struct scsi_device *sdev, int qdepth,
int reason);
/*
* iSCSI Flash DDB sysfs entry points
@ -203,7 +201,7 @@ static struct scsi_host_template qla4xxx_driver_template = {
.eh_timed_out = qla4xxx_eh_cmd_timed_out,
.slave_alloc = qla4xxx_slave_alloc,
.change_queue_depth = qla4xxx_change_queue_depth,
.change_queue_depth = iscsi_change_queue_depth,
.this_id = -1,
.cmd_per_lun = 3,
@ -9065,15 +9063,6 @@ static int qla4xxx_slave_alloc(struct scsi_device *sdev)
return 0;
}
static int qla4xxx_change_queue_depth(struct scsi_device *sdev, int qdepth,
int reason)
{
if (!ql4xqfulltracking)
return -EOPNOTSUPP;
return iscsi_change_queue_depth(sdev, qdepth, reason);
}
/**
* qla4xxx_del_from_active_array - returns an active srb
* @ha: Pointer to host adapter structure.
@ -9873,6 +9862,9 @@ static int __init qla4xxx_module_init(void)
{
int ret;
if (ql4xqfulltracking)
qla4xxx_driver_template.track_queue_depth = 1;
/* Allocate cache for SRBs. */
srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
SLAB_HWCACHE_ALIGN, NULL);

49
drivers/scsi/scsi_debug.c
View File

@ -4472,7 +4472,6 @@ static int
sdebug_change_qdepth(struct scsi_device *sdev, int qdepth, int reason)
{
int num_in_q = 0;
int bad = 0;
unsigned long iflags;
struct sdebug_dev_info *devip;
@ -4484,43 +4483,18 @@ sdebug_change_qdepth(struct scsi_device *sdev, int qdepth, int reason)
}
num_in_q = atomic_read(&devip->num_in_q);
spin_unlock_irqrestore(&queued_arr_lock, iflags);
if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP) {
if (qdepth < 1)
qdepth = 1;
/* allow to exceed max host queued_arr elements for testing */
if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
qdepth = SCSI_DEBUG_CANQUEUE + 10;
scsi_adjust_queue_depth(sdev, qdepth);
} else if (reason == SCSI_QDEPTH_QFULL)
scsi_track_queue_full(sdev, qdepth);
else
bad = 1;
if (bad)
sdev_printk(KERN_WARNING, sdev,
"%s: unknown reason=0x%x\n", __func__, reason);
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
if (SCSI_QDEPTH_QFULL == reason)
sdev_printk(KERN_INFO, sdev,
"%s: -> %d, num_in_q=%d, reason: queue full\n",
__func__, qdepth, num_in_q);
else {
const char *cp;
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
cp = "default (sysfs ?)";
break;
case SCSI_QDEPTH_RAMP_UP:
cp = "ramp up";
break;
default:
cp = "unknown";
break;
}
sdev_printk(KERN_INFO, sdev,
"%s: qdepth=%d, num_in_q=%d, reason: %s\n",
__func__, qdepth, num_in_q, cp);
}
if (qdepth < 1)
qdepth = 1;
/* allow to exceed max host queued_arr elements for testing */
if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
qdepth = SCSI_DEBUG_CANQUEUE + 10;
scsi_adjust_queue_depth(sdev, qdepth);
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
sdev_printk(KERN_INFO, sdev,
"%s: qdepth=%d, num_in_q=%d\n",
__func__, qdepth, num_in_q);
}
return sdev->queue_depth;
}
@ -4576,6 +4550,7 @@ static struct scsi_host_template sdebug_driver_template = {
.max_sectors = -1U,
.use_clustering = DISABLE_CLUSTERING,
.module = THIS_MODULE,
.track_queue_depth = 1,
};
static int sdebug_driver_probe(struct device * dev)

15
drivers/scsi/scsi_error.c
View File

@ -610,7 +610,7 @@ static void scsi_handle_queue_ramp_up(struct scsi_device *sdev)
struct scsi_host_template *sht = sdev->host->hostt;
struct scsi_device *tmp_sdev;
if (!sht->change_queue_depth ||
if (!sht->track_queue_depth ||
sdev->queue_depth >= sdev->max_queue_depth)
return;
@ -631,12 +631,8 @@ static void scsi_handle_queue_ramp_up(struct scsi_device *sdev)
tmp_sdev->id != sdev->id ||
tmp_sdev->queue_depth == sdev->max_queue_depth)
continue;
/*
* call back into LLD to increase queue_depth by one
* with ramp up reason code.
*/
sht->change_queue_depth(tmp_sdev, tmp_sdev->queue_depth + 1,
SCSI_QDEPTH_RAMP_UP);
scsi_adjust_queue_depth(tmp_sdev, tmp_sdev->queue_depth + 1);
sdev->last_queue_ramp_up = jiffies;
}
}
@ -646,7 +642,7 @@ static void scsi_handle_queue_full(struct scsi_device *sdev)
struct scsi_host_template *sht = sdev->host->hostt;
struct scsi_device *tmp_sdev;
if (!sht->change_queue_depth)
if (!sht->track_queue_depth)
return;
shost_for_each_device(tmp_sdev, sdev->host) {
@ -658,8 +654,7 @@ static void scsi_handle_queue_full(struct scsi_device *sdev)
* the device when we got the queue full so we start
* from the highest possible value and work our way down.
*/
sht->change_queue_depth(tmp_sdev, tmp_sdev->queue_depth - 1,
SCSI_QDEPTH_QFULL);
scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
}
}

14
drivers/scsi/ufs/ufshcd.c
View File

@ -2800,18 +2800,7 @@ static int ufshcd_change_queue_depth(struct scsi_device *sdev,
if (depth > hba->nutrs)
depth = hba->nutrs;
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
case SCSI_QDEPTH_RAMP_UP:
scsi_adjust_queue_depth(sdev, depth);
break;
case SCSI_QDEPTH_QFULL:
scsi_track_queue_full(sdev, depth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, depth);
return depth;
}
@ -4231,6 +4220,7 @@ static struct scsi_host_template ufshcd_driver_template = {
.can_queue = UFSHCD_CAN_QUEUE,
.max_host_blocked = 1,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,

15
drivers/scsi/virtio_scsi.c
View File

@ -691,18 +691,7 @@ static int virtscsi_change_queue_depth(struct scsi_device *sdev,
struct Scsi_Host *shost = sdev->host;
int max_depth = shost->cmd_per_lun;
switch (reason) {
case SCSI_QDEPTH_QFULL: /* Drop qdepth in response to BUSY state */
scsi_track_queue_full(sdev, qdepth);
break;
case SCSI_QDEPTH_RAMP_UP: /* Raise qdepth after BUSY state resolved */
case SCSI_QDEPTH_DEFAULT: /* Manual change via sysfs */
scsi_adjust_queue_depth(sdev, min(max_depth, qdepth));
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, min(max_depth, qdepth));
return sdev->queue_depth;
}
@ -770,6 +759,7 @@ static struct scsi_host_template virtscsi_host_template_single = {
.use_clustering = ENABLE_CLUSTERING,
.target_alloc = virtscsi_target_alloc,
.target_destroy = virtscsi_target_destroy,
.track_queue_depth = 1,
};
static struct scsi_host_template virtscsi_host_template_multi = {
@ -788,6 +778,7 @@ static struct scsi_host_template virtscsi_host_template_multi = {
.use_clustering = ENABLE_CLUSTERING,
.target_alloc = virtscsi_target_alloc,
.target_destroy = virtscsi_target_destroy,
.track_queue_depth = 1,
};
#define virtscsi_config_get(vdev, fld) \

15
drivers/target/loopback/tcm_loop.c
View File

@ -119,19 +119,7 @@ static int tcm_loop_change_queue_depth(
int depth,
int reason)
{
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
scsi_adjust_queue_depth(sdev, depth);
break;
case SCSI_QDEPTH_QFULL:
scsi_track_queue_full(sdev, depth);
break;
case SCSI_QDEPTH_RAMP_UP:
scsi_adjust_queue_depth(sdev, depth);
break;
default:
return -EOPNOTSUPP;
}
scsi_adjust_queue_depth(sdev, depth);
return sdev->queue_depth;
}
@ -423,6 +411,7 @@ static struct scsi_host_template tcm_loop_driver_template = {
.slave_alloc = tcm_loop_slave_alloc,
.module = THIS_MODULE,
.use_blk_tags = 1,
.track_queue_depth = 1,
};
static int tcm_loop_driver_probe(struct device *dev)

7
include/scsi/scsi_host.h
View File

@ -48,8 +48,6 @@ struct blk_queue_tags;
enum {
SCSI_QDEPTH_DEFAULT, /* default requested change, e.g. from sysfs */
SCSI_QDEPTH_QFULL, /* scsi-ml requested due to queue full */
SCSI_QDEPTH_RAMP_UP, /* scsi-ml requested due to threshold event */
};
struct scsi_host_template {
@ -426,6 +424,11 @@ struct scsi_host_template {
*/
unsigned use_blk_tags:1;
/*
* Track QUEUE_FULL events and reduce queue depth on demand.
*/
unsigned track_queue_depth:1;
/*
* This specifies the mode that a LLD supports.
*/