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[SCSI] qla2xxx: Ramp down queue depth for attached SCSI devices when driver resources are low.

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Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Chad Dupuis 2013-01-30 03:34:38 -05:00 committed by James Bottomley
parent 8d93f55022
commit 3c290d0b5f
6 changed files with 135 additions and 7 deletions
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2
drivers/scsi/qla2xxx/qla_dbg.c
View File

@ -17,7 +17,7 @@
* | | | 0x113a |
* | Device Discovery | 0x2087 | 0x2020-0x2022, |
* | | | 0x2016 |
* | Queue Command and IO tracing | 0x3030 | 0x3006-0x300b |
* | Queue Command and IO tracing | 0x3031 | 0x3006-0x300b |
* | | | 0x3027-0x3028 |
* | | | 0x302d-0x302e |
* | DPC Thread | 0x401d | 0x4002,0x4013 |

9
drivers/scsi/qla2xxx/qla_def.h
View File

@ -2536,6 +2536,7 @@ struct req_que {
srb_t **outstanding_cmds;
uint32_t current_outstanding_cmd;
uint16_t num_outstanding_cmds;
#define MAX_Q_DEPTH 32
int max_q_depth;
};
@ -3058,6 +3059,12 @@ struct qla_hw_data {
struct work_struct idc_state_handler;
struct work_struct nic_core_unrecoverable;
#define HOST_QUEUE_RAMPDOWN_INTERVAL (60 * HZ)
#define HOST_QUEUE_RAMPUP_INTERVAL (30 * HZ)
unsigned long host_last_rampdown_time;
unsigned long host_last_rampup_time;
int cfg_lun_q_depth;
struct qlt_hw_data tgt;
};
@ -3117,6 +3124,8 @@ typedef struct scsi_qla_host {
#define MPI_RESET_NEEDED 19 /* Initiate MPI FW reset */
#define ISP_QUIESCE_NEEDED 20 /* Driver need some quiescence */
#define SCR_PENDING 21 /* SCR in target mode */
#define HOST_RAMP_DOWN_QUEUE_DEPTH 22
#define HOST_RAMP_UP_QUEUE_DEPTH 23
uint32_t device_flags;
#define SWITCH_FOUND BIT_0

1
drivers/scsi/qla2xxx/qla_gbl.h
View File

@ -97,6 +97,7 @@ extern int qlport_down_retry;
extern int ql2xplogiabsentdevice;
extern int ql2xloginretrycount;
extern int ql2xfdmienable;
extern int ql2xmaxqdepth;
extern int ql2xallocfwdump;
extern int ql2xextended_error_logging;
extern int ql2xiidmaenable;

19
drivers/scsi/qla2xxx/qla_inline.h
View File

@ -213,3 +213,22 @@ qla2x00_gid_list_size(struct qla_hw_data *ha)
{
return sizeof(struct gid_list_info) * ha->max_fibre_devices;
}
static inline void
qla2x00_do_host_ramp_up(scsi_qla_host_t *vha)
{
if (vha->hw->cfg_lun_q_depth >= ql2xmaxqdepth)
return;
/* Wait at least HOST_QUEUE_RAMPDOWN_INTERVAL before ramping up */
if (time_before(jiffies, (vha->hw->host_last_rampdown_time +
HOST_QUEUE_RAMPDOWN_INTERVAL)))
return;
/* Wait at least HOST_QUEUE_RAMPUP_INTERVAL between each ramp up */
if (time_before(jiffies, (vha->hw->host_last_rampup_time +
HOST_QUEUE_RAMPUP_INTERVAL)))
return;
set_bit(HOST_RAMP_UP_QUEUE_DEPTH, &vha->dpc_flags);
}

4
drivers/scsi/qla2xxx/qla_isr.c
View File

@ -1934,6 +1934,7 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
/* Fast path completion. */
if (comp_status == CS_COMPLETE && scsi_status == 0) {
qla2x00_do_host_ramp_up(vha);
qla2x00_process_completed_request(vha, req, handle);
return;
@ -2193,6 +2194,9 @@ out:
cp->cmnd[8], cp->cmnd[9], scsi_bufflen(cp), rsp_info_len,
resid_len, fw_resid_len);
if (!res)
qla2x00_do_host_ramp_up(vha);
if (rsp->status_srb == NULL)
sp->done(ha, sp, res);
}

107
drivers/scsi/qla2xxx/qla_os.c
View File

@ -111,8 +111,7 @@ MODULE_PARM_DESC(ql2xfdmienable,
"Enables FDMI registrations. "
"0 - no FDMI. Default is 1 - perform FDMI.");
#define MAX_Q_DEPTH 32
static int ql2xmaxqdepth = MAX_Q_DEPTH;
int ql2xmaxqdepth = MAX_Q_DEPTH;
module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xmaxqdepth,
"Maximum queue depth to set for each LUN. "
@ -720,8 +719,10 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
}
sp = qla2x00_get_sp(base_vha, fcport, GFP_ATOMIC);
if (!sp)
if (!sp) {
set_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags);
goto qc24_host_busy;
}
sp->u.scmd.cmd = cmd;
sp->type = SRB_SCSI_CMD;
@ -734,6 +735,7 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
if (rval != QLA_SUCCESS) {
ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3013,
"Start scsi failed rval=%d for cmd=%p.\n", rval, cmd);
set_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags);
goto qc24_host_busy_free_sp;
}
@ -1458,6 +1460,81 @@ qla2x00_change_queue_type(struct scsi_device *sdev, int tag_type)
return tag_type;
}
static void
qla2x00_host_ramp_down_queuedepth(scsi_qla_host_t *vha)
{
scsi_qla_host_t *vp;
struct Scsi_Host *shost;
struct scsi_device *sdev;
struct qla_hw_data *ha = vha->hw;
unsigned long flags;
ha->host_last_rampdown_time = jiffies;
if (ha->cfg_lun_q_depth <= vha->host->cmd_per_lun)
return;
if ((ha->cfg_lun_q_depth / 2) < vha->host->cmd_per_lun)
ha->cfg_lun_q_depth = vha->host->cmd_per_lun;
else
ha->cfg_lun_q_depth = ha->cfg_lun_q_depth / 2;
/*
* Geometrically ramp down the queue depth for all devices on this
* adapter
*/
spin_lock_irqsave(&ha->vport_slock, flags);
list_for_each_entry(vp, &ha->vp_list, list) {
shost = vp->host;
shost_for_each_device(sdev, shost) {
if (sdev->queue_depth > shost->cmd_per_lun) {
if (sdev->queue_depth < ha->cfg_lun_q_depth)
continue;
ql_log(ql_log_warn, vp, 0x3031,
"%ld:%d:%d: Ramping down queue depth to %d",
vp->host_no, sdev->id, sdev->lun,
ha->cfg_lun_q_depth);
qla2x00_change_queue_depth(sdev,
ha->cfg_lun_q_depth, SCSI_QDEPTH_DEFAULT);
}
}
}
spin_unlock_irqrestore(&ha->vport_slock, flags);
return;
}
static void
qla2x00_host_ramp_up_queuedepth(scsi_qla_host_t *vha)
{
scsi_qla_host_t *vp;
struct Scsi_Host *shost;
struct scsi_device *sdev;
struct qla_hw_data *ha = vha->hw;
unsigned long flags;
ha->host_last_rampup_time = jiffies;
ha->cfg_lun_q_depth++;
/*
* Linearly ramp up the queue depth for all devices on this
* adapter
*/
spin_lock_irqsave(&ha->vport_slock, flags);
list_for_each_entry(vp, &ha->vp_list, list) {
shost = vp->host;
shost_for_each_device(sdev, shost) {
if (sdev->queue_depth > ha->cfg_lun_q_depth)
continue;
qla2x00_change_queue_depth(sdev, ha->cfg_lun_q_depth,
SCSI_QDEPTH_RAMP_UP);
}
}
spin_unlock_irqrestore(&ha->vport_slock, flags);
return;
}
/**
* qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
* @ha: HA context
@ -2235,6 +2312,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
ha->init_cb_size = sizeof(init_cb_t);
ha->link_data_rate = PORT_SPEED_UNKNOWN;
ha->optrom_size = OPTROM_SIZE_2300;
ha->cfg_lun_q_depth = ql2xmaxqdepth;
/* Assign ISP specific operations. */
if (IS_QLA2100(ha)) {
@ -4610,6 +4688,18 @@ qla2x00_do_dpc(void *data)
qla2xxx_flash_npiv_conf(base_vha);
}
if (test_and_clear_bit(HOST_RAMP_DOWN_QUEUE_DEPTH,
&base_vha->dpc_flags)) {
/* Prevents simultaneous ramp up and down */
clear_bit(HOST_RAMP_UP_QUEUE_DEPTH,
&base_vha->dpc_flags);
qla2x00_host_ramp_down_queuedepth(base_vha);
}
if (test_and_clear_bit(HOST_RAMP_UP_QUEUE_DEPTH,
&base_vha->dpc_flags))
qla2x00_host_ramp_up_queuedepth(base_vha);
if (!ha->interrupts_on)
ha->isp_ops->enable_intrs(ha);
@ -4807,7 +4897,9 @@ qla2x00_timer(scsi_qla_host_t *vha)
test_bit(ISP_UNRECOVERABLE, &vha->dpc_flags) ||
test_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags) ||
test_bit(VP_DPC_NEEDED, &vha->dpc_flags) ||
test_bit(RELOGIN_NEEDED, &vha->dpc_flags))) {
test_bit(RELOGIN_NEEDED, &vha->dpc_flags) ||
test_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags) ||
test_bit(HOST_RAMP_UP_QUEUE_DEPTH, &vha->dpc_flags))) {
ql_dbg(ql_dbg_timer, vha, 0x600b,
"isp_abort_needed=%d loop_resync_needed=%d "
"fcport_update_needed=%d start_dpc=%d "
@ -4820,12 +4912,15 @@ qla2x00_timer(scsi_qla_host_t *vha)
ql_dbg(ql_dbg_timer, vha, 0x600c,
"beacon_blink_needed=%d isp_unrecoverable=%d "
"fcoe_ctx_reset_needed=%d vp_dpc_needed=%d "
"relogin_needed=%d.\n",
"relogin_needed=%d, host_ramp_down_needed=%d "
"host_ramp_up_needed=%d.\n",
test_bit(BEACON_BLINK_NEEDED, &vha->dpc_flags),
test_bit(ISP_UNRECOVERABLE, &vha->dpc_flags),
test_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags),
test_bit(VP_DPC_NEEDED, &vha->dpc_flags),
test_bit(RELOGIN_NEEDED, &vha->dpc_flags));
test_bit(RELOGIN_NEEDED, &vha->dpc_flags),
test_bit(HOST_RAMP_UP_QUEUE_DEPTH, &vha->dpc_flags),
test_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags));
qla2xxx_wake_dpc(vha);
}