- MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
- unsigned long flags;
- int sz, ii;
- int numSGE = 0;
- int scale;
- int ioc_cap;
- u8 *mem;
- int error=0;
-
-
- /* 20010202 -sralston
- * Added sanity check on readiness of the MPT adapter.
- */
- if (ioc->last_state != MPI_IOC_STATE_OPERATIONAL) {
- printk(MYIOC_s_WARN_FMT
- "Skipping because it's not operational!\n",
- ioc->name);
- return -ENODEV;
- }
-
- if (!ioc->active) {
- printk(MYIOC_s_WARN_FMT "Skipping because it's disabled!\n",
- ioc->name);
- return -ENODEV;
- }
-
- /* Sanity check - ensure at least 1 port is INITIATOR capable
- */
- ioc_cap = 0;
- for (ii=0; ii < ioc->facts.NumberOfPorts; ii++) {
- if (ioc->pfacts[ii].ProtocolFlags &
- MPI_PORTFACTS_PROTOCOL_INITIATOR)
- ioc_cap ++;
- }
-
- if (!ioc_cap) {
- printk(MYIOC_s_WARN_FMT
- "Skipping ioc=%p because SCSI Initiator mode is NOT enabled!\n",
- ioc->name, ioc);
- return -ENODEV;
- }
-
- sh = scsi_host_alloc(&driver_template, sizeof(MPT_SCSI_HOST));
-
- if (!sh) {
- printk(MYIOC_s_WARN_FMT
- "Unable to register controller with SCSI subsystem\n",
- ioc->name);
- return -1;
- }
-
- spin_lock_irqsave(&ioc->FreeQlock, flags);
-
- /* Attach the SCSI Host to the IOC structure
- */
- ioc->sh = sh;
-
- sh->io_port = 0;
- sh->n_io_port = 0;
- sh->irq = 0;
-
- /* set 16 byte cdb's */
- sh->max_cmd_len = 16;
-
- /* Yikes! This is important!
- * Otherwise, by default, linux
- * only scans target IDs 0-7!
- * pfactsN->MaxDevices unreliable
- * (not supported in early
- * versions of the FW).
- * max_id = 1 + actual max id,
- * max_lun = 1 + actual last lun,
- * see hosts.h :o(
- */
- if (ioc->bus_type == SCSI) {
- sh->max_id = MPT_MAX_SCSI_DEVICES;
- } else {
- /* For FC, increase the queue depth
- * from MPT_SCSI_CAN_QUEUE (31)
- * to MPT_FC_CAN_QUEUE (63).
- */
- sh->can_queue = MPT_FC_CAN_QUEUE;
- sh->max_id =
- MPT_MAX_FC_DEVICES<256 ? MPT_MAX_FC_DEVICES : 255;
- }
-
- sh->max_lun = MPT_LAST_LUN + 1;
- sh->max_channel = 0;
- sh->this_id = ioc->pfacts[0].PortSCSIID;
-
- /* Required entry.
- */
- sh->unique_id = ioc->id;
-
- /* Verify that we won't exceed the maximum
- * number of chain buffers
- * We can optimize: ZZ = req_sz/sizeof(SGE)
- * For 32bit SGE's:
- * numSGE = 1 + (ZZ-1)*(maxChain -1) + ZZ
- * + (req_sz - 64)/sizeof(SGE)
- * A slightly different algorithm is required for
- * 64bit SGEs.
- */
- scale = ioc->req_sz/(sizeof(dma_addr_t) + sizeof(u32));
- if (sizeof(dma_addr_t) == sizeof(u64)) {
- numSGE = (scale - 1) *
- (ioc->facts.MaxChainDepth-1) + scale +
- (ioc->req_sz - 60) / (sizeof(dma_addr_t) +
- sizeof(u32));
- } else {
- numSGE = 1 + (scale - 1) *
- (ioc->facts.MaxChainDepth-1) + scale +
- (ioc->req_sz - 64) / (sizeof(dma_addr_t) +
- sizeof(u32));
- }
-
- if (numSGE < sh->sg_tablesize) {
- /* Reset this value */
- dprintk((MYIOC_s_INFO_FMT
- "Resetting sg_tablesize to %d from %d\n",
- ioc->name, numSGE, sh->sg_tablesize));
- sh->sg_tablesize = numSGE;
- }
-
- /* Set the pci device pointer in Scsi_Host structure.
- */
- scsi_set_device(sh, &ioc->pcidev->dev);
-
- spin_unlock_irqrestore(&ioc->FreeQlock, flags);
-
- hd = (MPT_SCSI_HOST *) sh->hostdata;
- hd->ioc = ioc;