318 lines
9.2 KiB
C
318 lines
9.2 KiB
C
/* fcal.c: Fibre Channel Arbitrated Loop SCSI host adapter driver.
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*
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* Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
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*
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*/
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/blkdev.h>
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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#include <linux/init.h>
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#ifdef CONFIG_KMOD
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#include <linux/kmod.h>
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#endif
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#include <asm/irq.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include "../fc4/fcp_impl.h"
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#include "fcal.h"
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#include <linux/module.h>
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/* #define FCAL_DEBUG */
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#define fcal_printk printk ("FCAL %s: ", fc->name); printk
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#ifdef FCAL_DEBUG
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#define FCALD(x) fcal_printk x;
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#define FCALND(x) printk ("FCAL: "); printk x;
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#else
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#define FCALD(x)
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#define FCALND(x)
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#endif
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static unsigned char alpa2target[] = {
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0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79,
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0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72,
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0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff,
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0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff,
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0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff,
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0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff,
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0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33,
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0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c,
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0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff,
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0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff,
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0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff,
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0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
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};
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static unsigned char target2alpa[] = {
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0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce,
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0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3,
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0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b,
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0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73,
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0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56,
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0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c,
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0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26,
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0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00
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};
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static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
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int fcal_slave_configure(struct scsi_device *device)
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{
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int depth_to_use;
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if (device->tagged_supported)
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depth_to_use = /* 254 */ 8;
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else
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depth_to_use = 2;
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scsi_adjust_queue_depth(device,
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(device->tagged_supported ?
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MSG_SIMPLE_TAG : 0),
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depth_to_use);
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return 0;
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}
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/* Detect all FC Arbitrated Loops attached to the machine.
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fc4 module has done all the work for us... */
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int __init fcal_detect(struct scsi_host_template *tpnt)
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{
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int nfcals = 0;
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fc_channel *fc;
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int fcalcount;
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int i;
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tpnt->proc_name = "fcal";
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fcalcount = 0;
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for_each_online_fc_channel(fc)
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if (fc->posmap)
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fcalcount++;
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FCALND(("%d channels online\n", fcalcount))
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if (!fcalcount) {
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#if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD)
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request_module("socal");
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for_each_online_fc_channel(fc)
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if (fc->posmap)
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fcalcount++;
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if (!fcalcount)
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#endif
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return 0;
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}
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for_each_online_fc_channel(fc) {
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struct Scsi_Host *host;
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long *ages;
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struct fcal *fcal;
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if (!fc->posmap) continue;
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/* Strange, this is already registered to some other SCSI host, then it cannot be fcal */
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if (fc->scsi_name[0]) continue;
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memcpy (fc->scsi_name, "FCAL", 4);
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fc->can_queue = FCAL_CAN_QUEUE;
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fc->rsp_size = 64;
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fc->encode_addr = fcal_encode_addr;
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ages = kmalloc (128 * sizeof(long), GFP_KERNEL);
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if (!ages) continue;
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host = scsi_register (tpnt, sizeof (struct fcal));
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if (!host)
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{
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kfree(ages);
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continue;
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}
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if (!try_module_get(fc->module)) {
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kfree(ages);
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scsi_unregister(host);
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continue;
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}
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nfcals++;
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fcal = (struct fcal *)host->hostdata;
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fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
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for (i = 0; i < fc->posmap->len; i++) {
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int status, target, alpa;
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alpa = fc->posmap->list[i];
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FCALD(("Sending PLOGI to %02x\n", alpa))
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target = alpa2target[alpa];
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status = fc_do_plogi(fc, alpa, fcal->node_wwn + target,
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fcal->nport_wwn + target);
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FCALD(("PLOGI returned with status %d\n", status))
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if (status != FC_STATUS_OK)
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continue;
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FCALD(("Sending PRLI to %02x\n", alpa))
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status = fc_do_prli(fc, alpa);
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FCALD(("PRLI returned with status %d\n", status))
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if (status == FC_STATUS_OK)
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fcal->map[target] = 1;
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}
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host->max_id = 127;
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host->irq = fc->irq;
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#ifdef __sparc_v9__
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host->unchecked_isa_dma = 1;
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#endif
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fc->channels = 1;
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fc->targets = 127;
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fc->ages = ages;
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memset (ages, 0, 128 * sizeof(long));
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fcal->fc = fc;
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FCALD(("Found FCAL\n"))
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}
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if (nfcals)
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#ifdef __sparc__
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printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals);
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#else
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printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals);
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#endif
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return nfcals;
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}
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int fcal_release(struct Scsi_Host *host)
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{
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struct fcal *fcal = (struct fcal *)host->hostdata;
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fc_channel *fc = fcal->fc;
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module_put(fc->module);
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fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
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FCALND((" releasing fcal.\n"));
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kfree (fc->ages);
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FCALND(("released fcal!\n"));
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return 0;
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}
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#undef SPRINTF
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#define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
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int fcal_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
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{
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struct fcal *fcal;
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fc_channel *fc;
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char *pos = buffer;
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int i, j;
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if (inout) return length;
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fcal = (struct fcal *)host->hostdata;
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fc = fcal->fc;
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#ifdef __sparc__
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SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s PROM node %x\n", fc->name, fc->dev->prom_node);
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#else
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SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name);
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#endif
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SPRINTF ("Initiator AL-PA: %02x\n", fc->sid);
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SPRINTF ("\nAttached devices:\n");
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for (i = 0; i < fc->posmap->len; i++) {
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unsigned char alpa = fc->posmap->list[i];
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unsigned char target;
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u32 *u1, *u2;
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target = alpa2target[alpa];
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u1 = (u32 *)&fcal->nport_wwn[target];
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u2 = (u32 *)&fcal->node_wwn[target];
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if (!u1[0] && !u1[1]) {
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SPRINTF (" [AL-PA: %02x] Not responded to PLOGI\n", alpa);
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} else if (!fcal->map[target]) {
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SPRINTF (" [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n",
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alpa, u1[0], u1[1], u2[0], u2[1]);
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} else {
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struct scsi_device *scd;
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shost_for_each_device(scd, host)
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if (scd->id == target) {
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SPRINTF (" [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x] ",
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alpa, target, u1[0], u1[1], u2[0], u2[1]);
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SPRINTF ("%s ", scsi_device_type(scd->type));
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for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++)
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SPRINTF ("%c", scd->vendor[j]);
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SPRINTF (" ");
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for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++)
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SPRINTF ("%c", scd->model[j]);
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SPRINTF ("\n");
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}
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}
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}
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SPRINTF ("\n");
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*start = buffer + offset;
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if ((pos - buffer) < offset)
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return 0;
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else if (pos - buffer - offset < length)
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return pos - buffer - offset;
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else
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return length;
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}
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/*
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For FC-AL, we use a simple addressing: we have just one channel 0,
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and all AL-PAs are mapped to targets 0..0x7e
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*/
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static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
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{
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struct fcal *f;
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/* We don't support LUNs yet - I'm not sure if LUN should be in SCSI fcp_cdb, or in second byte of addr[0] */
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if (SCpnt->cmnd[1] & 0xe0) return -EINVAL;
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/* FC-PLDA tells us... */
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memset(addr, 0, 8);
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f = (struct fcal *)SCpnt->device->host->hostdata;
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if (!f->map[SCpnt->device->id])
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return -EINVAL;
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/* Now, determine DID: It will be Native Identifier, so we zero upper
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2 bytes of the 3 byte DID, lowest byte will be AL-PA */
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fcmd->did = target2alpa[SCpnt->device->id];
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FCALD(("trying DID %06x\n", fcmd->did))
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return 0;
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}
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static struct scsi_host_template driver_template = {
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.name = "Fibre Channel Arbitrated Loop",
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.detect = fcal_detect,
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.release = fcal_release,
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.proc_info = fcal_proc_info,
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.queuecommand = fcp_scsi_queuecommand,
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.slave_configure = fcal_slave_configure,
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.can_queue = FCAL_CAN_QUEUE,
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.this_id = -1,
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.sg_tablesize = 1,
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.cmd_per_lun = 1,
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.use_clustering = ENABLE_CLUSTERING,
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.eh_abort_handler = fcp_scsi_abort,
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.eh_device_reset_handler = fcp_scsi_dev_reset,
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.eh_host_reset_handler = fcp_scsi_host_reset,
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};
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#include "scsi_module.c"
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MODULE_LICENSE("GPL");
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