[SCSI] qla2xxx: Use bitmap to store loop_id's for fcports.
Store used fcport loop_id's in a bitmap so that as opposed to looping through
all fcports to find the next free loop_id, new loop_id lookup can be just be
done via bitops.
[jejb: plus fix for incorrect LOOPID_MAP_SIZE from Andrew Vasquez]
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index d651179..0c4fd2c 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -11,7 +11,7 @@
* ----------------------------------------------------------------------
* | Level | Last Value Used | Holes |
* ----------------------------------------------------------------------
- * | Module Init and Probe | 0x0122 | 0x4b,0xba,0xfa |
+ * | Module Init and Probe | 0x0123 | 0x4b,0xba,0xfa |
* | Mailbox commands | 0x1140 | 0x111a-0x111b |
* | | | 0x112c-0x112e |
* | | | 0x113a |
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 39007f5..28c0b35 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -129,6 +129,7 @@
#define MAX_FIBRE_DEVICES_2400 2048
#define MAX_FIBRE_DEVICES_LOOP 128
#define MAX_FIBRE_DEVICES_MAX MAX_FIBRE_DEVICES_2400
+#define LOOPID_MAP_SIZE (ha->max_fibre_devices)
#define MAX_FIBRE_LUNS 0xFFFF
#define MAX_HOST_COUNT 16
@@ -2918,6 +2919,7 @@
void *md_dump;
uint32_t md_dump_size;
+ void *loop_id_map;
struct qlt_hw_data tgt;
};
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index a44653b..2900523 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -3285,7 +3285,7 @@
*/
if ((fcport->flags & FCF_FABRIC_DEVICE) == 0) {
fcport->d_id.b24 = new_fcport->d_id.b24;
- fcport->loop_id = FC_NO_LOOP_ID;
+ qla2x00_clear_loop_id(fcport);
fcport->flags |= (FCF_FABRIC_DEVICE |
FCF_LOGIN_NEEDED);
break;
@@ -3306,7 +3306,7 @@
ha->isp_ops->fabric_logout(vha, fcport->loop_id,
fcport->d_id.b.domain, fcport->d_id.b.area,
fcport->d_id.b.al_pa);
- fcport->loop_id = FC_NO_LOOP_ID;
+ qla2x00_clear_loop_id(fcport);
}
break;
@@ -3352,71 +3352,32 @@
qla2x00_find_new_loop_id(scsi_qla_host_t *vha, fc_port_t *dev)
{
int rval;
- int found;
- fc_port_t *fcport;
- uint16_t first_loop_id;
struct qla_hw_data *ha = vha->hw;
- struct scsi_qla_host *vp;
- struct scsi_qla_host *tvp;
unsigned long flags = 0;
rval = QLA_SUCCESS;
- /* Save starting loop ID. */
- first_loop_id = dev->loop_id;
+ spin_lock_irqsave(&ha->vport_slock, flags);
- for (;;) {
- /* Skip loop ID if already used by adapter. */
- if (dev->loop_id == vha->loop_id)
- dev->loop_id++;
+ dev->loop_id = find_first_zero_bit(ha->loop_id_map,
+ LOOPID_MAP_SIZE);
+ if (dev->loop_id >= LOOPID_MAP_SIZE ||
+ qla2x00_is_reserved_id(vha, dev->loop_id)) {
+ dev->loop_id = FC_NO_LOOP_ID;
+ rval = QLA_FUNCTION_FAILED;
+ } else
+ set_bit(dev->loop_id, ha->loop_id_map);
- /* Skip reserved loop IDs. */
- while (qla2x00_is_reserved_id(vha, dev->loop_id))
- dev->loop_id++;
+ spin_unlock_irqrestore(&ha->vport_slock, flags);
- /* Reset loop ID if passed the end. */
- if (dev->loop_id > ha->max_loop_id) {
- /* first loop ID. */
- dev->loop_id = ha->min_external_loopid;
- }
-
- /* Check for loop ID being already in use. */
- found = 0;
- fcport = NULL;
-
- spin_lock_irqsave(&ha->vport_slock, flags);
- list_for_each_entry_safe(vp, tvp, &ha->vp_list, list) {
- list_for_each_entry(fcport, &vp->vp_fcports, list) {
- if (fcport->loop_id == dev->loop_id &&
- fcport != dev) {
- /* ID possibly in use */
- found++;
- break;
- }
- }
- if (found)
- break;
- }
- spin_unlock_irqrestore(&ha->vport_slock, flags);
-
- /* If not in use then it is free to use. */
- if (!found) {
- ql_dbg(ql_dbg_disc, dev->vha, 0x2086,
- "Assigning new loopid=%x, portid=%x.\n",
- dev->loop_id, dev->d_id.b24);
- break;
- }
-
- /* ID in use. Try next value. */
- dev->loop_id++;
-
- /* If wrap around. No free ID to use. */
- if (dev->loop_id == first_loop_id) {
- dev->loop_id = FC_NO_LOOP_ID;
- rval = QLA_FUNCTION_FAILED;
- break;
- }
- }
+ if (rval == QLA_SUCCESS)
+ ql_dbg(ql_dbg_disc, dev->vha, 0x2086,
+ "Assigning new loopid=%x, portid=%x.\n",
+ dev->loop_id, dev->d_id.b24);
+ else
+ ql_log(ql_log_warn, dev->vha, 0x2087,
+ "No loop_id's available, portid=%x.\n",
+ dev->d_id.b24);
return (rval);
}
@@ -3616,7 +3577,7 @@
ha->isp_ops->fabric_logout(vha, fcport->loop_id,
fcport->d_id.b.domain, fcport->d_id.b.area,
fcport->d_id.b.al_pa);
- fcport->loop_id = FC_NO_LOOP_ID;
+ qla2x00_clear_loop_id(fcport);
fcport->login_retry = 0;
rval = 3;
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h
index 6e45764..c12add2 100644
--- a/drivers/scsi/qla2xxx/qla_inline.h
+++ b/drivers/scsi/qla2xxx/qla_inline.h
@@ -57,6 +57,20 @@
return fcp;
}
+static inline void
+qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha)
+{
+ int i;
+
+ if (IS_FWI2_CAPABLE(ha))
+ return;
+
+ for (i = 0; i < SNS_FIRST_LOOP_ID; i++)
+ set_bit(i, ha->loop_id_map);
+ set_bit(MANAGEMENT_SERVER, ha->loop_id_map);
+ set_bit(BROADCAST, ha->loop_id_map);
+}
+
static inline int
qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
{
@@ -69,6 +83,18 @@
}
static inline void
+qla2x00_clear_loop_id(fc_port_t *fcport) {
+ struct qla_hw_data *ha = fcport->vha->hw;
+
+ if (fcport->loop_id == FC_NO_LOOP_ID ||
+ qla2x00_is_reserved_id(fcport->vha, fcport->loop_id))
+ return;
+
+ clear_bit(fcport->loop_id, ha->loop_id_map);
+ fcport->loop_id = FC_NO_LOOP_ID;
+}
+
+static inline void
qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp)
{
struct dsd_dma *dsd_ptr, *tdsd_ptr;
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index caa4ce4..5f99029 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2872,6 +2872,7 @@
list_for_each_entry_safe(fcport, tfcport, &vha->vp_fcports, list) {
list_del(&fcport->list);
+ qla2x00_clear_loop_id(fcport);
kfree(fcport);
fcport = NULL;
}
@@ -3169,6 +3170,18 @@
}
INIT_LIST_HEAD(&ha->vp_list);
+
+ /* Allocate memory for our loop_id bitmap */
+ ha->loop_id_map = kzalloc(BITS_TO_LONGS(LOOPID_MAP_SIZE) * sizeof(long),
+ GFP_KERNEL);
+ if (!ha->loop_id_map)
+ goto fail_async_pd;
+ else {
+ qla2x00_set_reserved_loop_ids(ha);
+ ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0123,
+ "loop_id_map=%p. \n", ha->loop_id_map);
+ }
+
return 1;
fail_async_pd:
@@ -3352,6 +3365,7 @@
kfree(ha->nvram);
kfree(ha->npiv_info);
kfree(ha->swl);
+ kfree(ha->loop_id_map);
ha->srb_mempool = NULL;
ha->ctx_mempool = NULL;
@@ -3687,7 +3701,7 @@
}
if (fcport->login_retry == 0 && status != QLA_SUCCESS)
- fcport->loop_id = FC_NO_LOOP_ID;
+ qla2x00_clear_loop_id(fcport);
}
if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
break;