[SCSI] fusion - Greater than 255 target and lun support

Add support for greater than 255 target and luns.
Kill the hd->Target[] field, and change all references
of bus_id/target_id, to channel/id.

Signed-off-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 21 insertions, 30 deletions

diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
index c819c23b55b1..cd8fa39ec270 100644
--- a/drivers/message/fusion/mptfc.c
+++ b/drivers/message/fusion/mptfc.c
@@ -86,6 +86,12 @@ MODULE_PARM_DESC(mptfc_dev_loss_tmo, " Initial time the driver programs the "
                                      " return following a device loss event."
                                      "  Default=60.");
 
+/* scsi-mid layer global parmeter is max_report_luns, which is 511 */
+#define MPTFC_MAX_LUN (16895)
+static int max_lun = MPTFC_MAX_LUN;
+module_param(max_lun, int, 0);
+MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");
+
 static int      mptfcDoneCtx = -1;
 static int      mptfcTaskCtx = -1;
 static int      mptfcInternalCtx = -1; /* Used only for internal commands */
@@ -292,10 +298,9 @@ mptfc_GetFcDevPage0(MPT_ADAPTER *ioc, int ioc_port,
         U32                      port_id = 0xffffff;
         int                      num_targ = 0;
         int                      max_bus = ioc->facts.MaxBuses;
-        int                      max_targ = ioc->facts.MaxDevices;
+        int                      max_targ;
 
-        if (max_bus == 0 || max_targ == 0)
-                goto out;
+        max_targ = (ioc->facts.MaxDevices == 0) ? 256 : ioc->facts.MaxDevices;
 
         data_sz = sizeof(FCDevicePage0_t) * max_bus * max_targ;
         p_p0 = p0_array =  kzalloc(data_sz, GFP_KERNEL);
@@ -467,8 +472,8 @@ mptfc_register_dev(MPT_ADAPTER *ioc, int channel, FCDevicePage0_t *pg0)
                         if (ri->starget) {
                                 vtarget = ri->starget->hostdata;
                                 if (vtarget) {
-                                        vtarget->target_id = pg0->CurrentTargetID;
-                                        vtarget->bus_id = pg0->CurrentBus;
+                                        vtarget->id = pg0->CurrentTargetID;
+                                        vtarget->channel = pg0->CurrentBus;
                                 }
                         }
                         *((struct mptfc_rport_info **)rport->dd_data) = ri;
@@ -540,8 +545,8 @@ mptfc_target_alloc(struct scsi_target *starget)
         if (rport) {
                 ri = *((struct mptfc_rport_info **)rport->dd_data);
                 if (ri) {       /* better be! */
-                        vtarget->target_id = ri->pg0.CurrentTargetID;
-                        vtarget->bus_id = ri->pg0.CurrentBus;
+                        vtarget->id = ri->pg0.CurrentTargetID;
+                        vtarget->channel = ri->pg0.CurrentBus;
                         ri->starget = starget;
                         rc = 0;
                 }
@@ -592,7 +597,6 @@ mptfc_slave_alloc(struct scsi_device *sdev)
         if (vtarget->num_luns == 0) {
                 vtarget->ioc_id = hd->ioc->id;
                 vtarget->tflags = MPT_TARGET_FLAGS_Q_YES;
-                hd->Targets[sdev->id] = vtarget;
         }
 
         vdev->vtarget = vtarget;
@@ -630,16 +634,17 @@ mptfc_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
         struct mptfc_rport_info *ri;
         struct fc_rport *rport = starget_to_rport(scsi_target(SCpnt->device));
         int             err;
+        VirtDevice      *vdev = SCpnt->device->hostdata;
 
-        err = fc_remote_port_chkready(rport);
-        if (unlikely(err)) {
-                SCpnt->result = err;
+        if (!vdev || !vdev->vtarget) {
+                SCpnt->result = DID_NO_CONNECT << 16;
                 done(SCpnt);
                 return 0;
         }
 
-        if (!SCpnt->device->hostdata) { /* vdev */
-                SCpnt->result = DID_NO_CONNECT << 16;
+        err = fc_remote_port_chkready(rport);
+        if (unlikely(err)) {
+                SCpnt->result = err;
                 done(SCpnt);
                 return 0;
         }
@@ -1143,7 +1148,7 @@ mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
                 printk(MYIOC_s_WARN_FMT
                         "Skipping ioc=%p because SCSI Initiator mode is NOT enabled!\n",
                         ioc->name, ioc);
-                return -ENODEV;
+                return 0;
         }
 
         sh = scsi_host_alloc(&mptfc_driver_template, sizeof(MPT_SCSI_HOST));
@@ -1173,10 +1178,9 @@ mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         /* set 16 byte cdb's */
         sh->max_cmd_len = 16;
 
-        sh->max_id = MPT_MAX_FC_DEVICES<256 ? MPT_MAX_FC_DEVICES : 255;
+        sh->max_id = ioc->pfacts->MaxDevices;
+        sh->max_lun = max_lun;
 
-        sh->max_lun = MPT_LAST_LUN + 1;
-        sh->max_channel = 0;
         sh->this_id = ioc->pfacts[0].PortSCSIID;
 
         /* Required entry.
@@ -1230,19 +1234,6 @@ mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         dprintk((MYIOC_s_INFO_FMT "ScsiLookup @ %p\n",
                  ioc->name, hd->ScsiLookup));
 
-        /* Allocate memory for the device structures.
-         * A non-Null pointer at an offset
-         * indicates a device exists.
-         * max_id = 1 + maximum id (hosts.h)
-         */
-        hd->Targets = kcalloc(sh->max_id, sizeof(void *), GFP_ATOMIC);
-        if (!hd->Targets) {
-                error = -ENOMEM;
-                goto out_mptfc_probe;
-        }
-
-        dprintk((KERN_INFO "  vdev @ %p\n", hd->Targets));
-
         /* Clear the TM flags
          */
         hd->tmPending = 0;