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scsi: qla2xxx: Add mode control for each physical port

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Add ability to allow each physical port to control operating mode.  Current
code forces all ports to behave in one mode (i.e. initiator, target or
dual). This patch allows user to select the operating mode for each port.

- Driver must be loaded in dual mode to allow resource allocation

modprobe qla2xxx qlini_mode=dual

- In addition user can make adjustment to exchange resources using following
  command

echo 1024 > /sys/class/scsi_host/host<x>/ql2xiniexchg
echo 1024 > /sys/class/scsi_host/host<x>/ql2xexchoffld

- trigger mode change and new setting of ql2xexchoffld|ql2xiniexchg

echo [<value>] > /sys/class/scsi_host/host<x>/qlini_mode

where, value can be one of following
  - enabled
  - disabled
  - dual
  - exclusive

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran
2018-09-11 10:18:18 -07:00
committed by Martin K. Petersen
parent 0e324e949e
commit 0645cb8350
7 changed files with 542 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

59
drivers/scsi/qla2xxx/qla_os.c
View File

@@ -4290,29 +4290,34 @@ static void
qla2x00_number_of_exch(scsi_qla_host_t *vha, u32 *ret_cnt, u16 max_cnt)
{
u32 temp;
struct init_cb_81xx *icb = (struct init_cb_81xx *)&vha->hw->init_cb;
*ret_cnt = FW_DEF_EXCHANGES_CNT;
if (max_cnt > vha->hw->max_exchg)
max_cnt = vha->hw->max_exchg;
if (qla_ini_mode_enabled(vha)) {
if (ql2xiniexchg > max_cnt)
ql2xiniexchg = max_cnt;
if (vha->ql2xiniexchg > max_cnt)
vha->ql2xiniexchg = max_cnt;
if (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT)
*ret_cnt = vha->ql2xiniexchg;
if (ql2xiniexchg > FW_DEF_EXCHANGES_CNT)
*ret_cnt = ql2xiniexchg;
} else if (qla_tgt_mode_enabled(vha)) {
if (ql2xexchoffld > max_cnt)
ql2xexchoffld = max_cnt;
if (vha->ql2xexchoffld > max_cnt) {
vha->ql2xexchoffld = max_cnt;
icb->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
}
if (ql2xexchoffld > FW_DEF_EXCHANGES_CNT)
*ret_cnt = ql2xexchoffld;
if (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT)
*ret_cnt = vha->ql2xexchoffld;
} else if (qla_dual_mode_enabled(vha)) {
temp = ql2xiniexchg + ql2xexchoffld;
temp = vha->ql2xiniexchg + vha->ql2xexchoffld;
if (temp > max_cnt) {
ql2xiniexchg -= (temp - max_cnt)/2;
ql2xexchoffld -= (((temp - max_cnt)/2) + 1);
vha->ql2xiniexchg -= (temp - max_cnt)/2;
vha->ql2xexchoffld -= (((temp - max_cnt)/2) + 1);
temp = max_cnt;
icb->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
}
if (temp > FW_DEF_EXCHANGES_CNT)
@@ -4350,6 +4355,12 @@ qla2x00_set_exchoffld_buffer(scsi_qla_host_t *vha)
if (totsz != ha->exchoffld_size) {
qla2x00_free_exchoffld_buffer(ha);
if (actual_cnt <= FW_DEF_EXCHANGES_CNT) {
ha->exchoffld_size = 0;
ha->flags.exchoffld_enabled = 0;
return QLA_SUCCESS;
}
ha->exchoffld_size = totsz;
ql_log(ql_log_info, vha, 0xd016,
@@ -4382,6 +4393,15 @@ qla2x00_set_exchoffld_buffer(scsi_qla_host_t *vha)
return -ENOMEM;
}
} else if (!ha->exchoffld_buf || (actual_cnt <= FW_DEF_EXCHANGES_CNT)) {
/* pathological case */
qla2x00_free_exchoffld_buffer(ha);
ha->exchoffld_size = 0;
ha->flags.exchoffld_enabled = 0;
ql_log(ql_log_info, vha, 0xd016,
"Exchange offload not enable: offld size=%d, actual count=%d entry sz=0x%x, total sz=0x%x.\n",
ha->exchoffld_size, actual_cnt, size, totsz);
return 0;
}
/* Now configure the dma buffer */
@@ -4397,7 +4417,7 @@ qla2x00_set_exchoffld_buffer(scsi_qla_host_t *vha)
if (qla_ini_mode_enabled(vha))
icb->exchange_count = 0;
else
icb->exchange_count = cpu_to_le16(ql2xexchoffld);
icb->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
}
return rval;
@@ -4605,6 +4625,10 @@ struct scsi_qla_host *qla2x00_create_host(struct scsi_host_template *sht,
vha->host_no = host->host_no;
vha->hw = ha;
vha->qlini_mode = ql2x_ini_mode;
vha->ql2xexchoffld = ql2xexchoffld;
vha->ql2xiniexchg = ql2xiniexchg;
INIT_LIST_HEAD(&vha->vp_fcports);
INIT_LIST_HEAD(&vha->work_list);
INIT_LIST_HEAD(&vha->list);
@@ -6081,15 +6105,17 @@ qla2x00_do_dpc(void *data)
!test_bit(UNLOADING, &base_vha->dpc_flags)) {
bool do_reset = true;
switch (ql2x_ini_mode) {
switch (base_vha->qlini_mode) {
case QLA2XXX_INI_MODE_ENABLED:
break;
case QLA2XXX_INI_MODE_DISABLED:
if (!qla_tgt_mode_enabled(base_vha))
if (!qla_tgt_mode_enabled(base_vha) &&
!ha->flags.fw_started)
do_reset = false;
break;
case QLA2XXX_INI_MODE_DUAL:
if (!qla_dual_mode_enabled(base_vha))
if (!qla_dual_mode_enabled(base_vha) &&
!ha->flags.fw_started)
do_reset = false;
break;
default:
@@ -7020,6 +7046,9 @@ qla2x00_module_init(void)
if (ql2xextended_error_logging == 1)
ql2xextended_error_logging = QL_DBG_DEFAULT1_MASK;
if (ql2x_ini_mode == QLA2XXX_INI_MODE_DUAL)
qla_insert_tgt_attrs();
qla2xxx_transport_template =
fc_attach_transport(&qla2xxx_transport_functions);
if (!qla2xxx_transport_template) {