[PATCH v4 4/5] qla2xxx_nvmet: Add SysFS node for FC-NVMe Target

[Himanshu Madhani]

From: Anil Gurumurthy <anil.gurumur...@cavium.com>

This patch adds SysFS node for NVMe Target configuration

Signed-off-by: Anil Gurumurthy <anil.gurumur...@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madh...@cavium.com>
---
 drivers/scsi/qla2xxx/qla_attr.c | 33 +++++++++++++++++++++++++++++++++
 drivers/scsi/qla2xxx/qla_gs.c   |  2 +-
 drivers/scsi/qla2xxx/qla_init.c |  3 ++-
 3 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 0bb9ac6ece92..678aff5ca947 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -13,6 +13,7 @@
 #include <linux/delay.h>
 
 static int qla24xx_vport_disable(struct fc_vport *, bool);
+extern void qlt_set_mode(struct scsi_qla_host *vha);
 
 /* SYSFS attributes --------------------------------------------------------- 
*/
 
@@ -631,6 +632,37 @@ static struct bin_attribute sysfs_sfp_attr = {
 };
 
 static ssize_t
+qla2x00_sysfs_write_nvmet(struct file *filp, struct kobject *kobj,
+                       struct bin_attribute *bin_attr,
+                       char *buf, loff_t off, size_t count)
+{
+       struct scsi_qla_host *vha = shost_priv(dev_to_shost(container_of(kobj,
+           struct device, kobj)));
+       struct qla_hw_data *ha = vha->hw;
+       scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
+
+       ql_log(ql_log_info, vha, 0x706e,
+           "Bringing up target mode!! vha:%p\n", vha);
+       qlt_op_target_mode = 1;
+       qlt_set_mode(base_vha);
+       set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+       qla2xxx_wake_dpc(vha);
+       qla2x00_wait_for_hba_online(vha);
+
+       return count;
+}
+
+static struct bin_attribute sysfs_nvmet_attr = {
+       .attr = {
+               .name = "nvmet",
+               .mode = 0200,
+       },
+       .size = 0,
+       .write = qla2x00_sysfs_write_nvmet,
+};
+
+
+static ssize_t
 qla2x00_sysfs_write_reset(struct file *filp, struct kobject *kobj,
                        struct bin_attribute *bin_attr,
                        char *buf, loff_t off, size_t count)
@@ -943,6 +975,7 @@ static struct sysfs_entry {
        { "issue_logo", &sysfs_issue_logo_attr, },
        { "xgmac_stats", &sysfs_xgmac_stats_attr, 3 },
        { "dcbx_tlv", &sysfs_dcbx_tlv_attr, 3 },
+       { "nvmet", &sysfs_nvmet_attr, },
        { NULL },
 };
 
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index ea55ed972eed..cfc6818952a0 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -698,7 +698,7 @@ qla2x00_rff_id(scsi_qla_host_t *vha, u8 type)
                return (QLA_SUCCESS);
 
        return qla_async_rffid(vha, &vha->d_id, qlt_rff_id(vha),
-           FC4_TYPE_FCP_SCSI);
+           type);
 }
 
 static int qla_async_rffid(scsi_qla_host_t *vha, port_id_t *d_id,
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 665964d4f0c4..36d67230c3b1 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -5526,7 +5526,8 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
                 * will be newer than discovery_gen. */
                qlt_do_generation_tick(vha, &discovery_gen);
 
-               if (USE_ASYNC_SCAN(ha)) {
+               if (USE_ASYNC_SCAN(ha) && !(vha->flags.nvmet_enabled)) {
+               /* If NVME target mode is enabled, go through regular scan */
                        rval = qla24xx_async_gpnft(vha, FC4_TYPE_FCP_SCSI,
                            NULL);
                        if (rval)
-- 
2.12.0