patch-2.2.4 linux/drivers/scsi/fcal.c

• Lines: 308
• Date: Mon Mar 15 16:11:31 1999
• Orig file: v2.2.3/linux/drivers/scsi/fcal.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.3/linux/drivers/scsi/fcal.c linux/drivers/scsi/fcal.c
@@ -0,0 +1,307 @@
+/* fcal.c: Fibre Channel Arbitrated Loop SCSI host adapter driver.
+ *
+ * Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/blk.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/config.h>
+#ifdef CONFIG_KMOD
+#include <linux/kmod.h>
+#endif
+
+#include <asm/irq.h>
+
+#include "scsi.h"
+#include "hosts.h"
+#include "../fc4/fcp_impl.h"
+#include "fcal.h"
+
+#include <linux/module.h>
+
+/* #define FCAL_DEBUG */
+
+#define fcal_printk printk ("FCAL %s: ", fc->name); printk
+
+#ifdef FCAL_DEBUG
+#define FCALD(x)  fcal_printk x;
+#define FCALND(x) printk ("FCAL: "); printk x;
+#else
+#define FCALD(x)
+#define FCALND(x)
+#endif
+
+static unsigned char alpa2target[] = {
+0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79,
+0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72,
+0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff,
+0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff,
+0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff,
+0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff,
+0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33,
+0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c,
+0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff,
+0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff,
+0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff,
+0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
+};
+
+static unsigned char target2alpa[] = {
+0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce,
+0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3,
+0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b,
+0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73,
+0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56,
+0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c,
+0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26,
+0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00
+};
+
+struct proc_dir_entry proc_scsi_fcal = {
+	PROC_SCSI_FCAL, 4, "fcal",
+	S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
+
+static void fcal_select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist)
+{
+	Scsi_Device *device;
+	
+	for (device = devlist; device; device = device->next) {
+		if (device->host != host) continue;
+		if (device->tagged_supported)
+			device->queue_depth = /* 254 */ 8;
+		else
+			device->queue_depth = 2;
+	}
+}
+
+/* Detect all FC Arbitrated Loops attached to the machine.
+   fc4 module has done all the work for us... */
+__initfunc(int fcal_detect(Scsi_Host_Template *tpnt))
+{
+	int nfcals = 0;
+	fc_channel *fc;
+	int fcalcount;
+	int i;
+
+	tpnt->proc_dir = &proc_scsi_fcal;
+	fcalcount = 0;
+	for_each_online_fc_channel(fc)
+		if (fc->posmap)
+			fcalcount++;
+	FCALND(("%d channels online\n", fcalcount))
+	if (!fcalcount) {
+#if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD)
+		request_module("socal");
+		
+		for_each_online_fc_channel(fc)
+			if (fc->posmap)
+				fcalcount++;
+		if (!fcalcount)
+#endif
+			return 0;
+	}
+	for_each_online_fc_channel(fc) {
+		struct Scsi_Host *host;
+		long *ages;
+		struct fcal *fcal;
+		
+		if (!fc->posmap) continue;
+		
+		/* Strange, this is already registered to some other SCSI host, then it cannot be fcal */
+		if (fc->scsi_name[0]) continue;
+		memcpy (fc->scsi_name, "FCAL", 4);
+		
+		fc->can_queue = FCAL_CAN_QUEUE;
+		fc->rsp_size = 64;
+		fc->encode_addr = fcal_encode_addr;
+		
+		ages = kmalloc (128 * sizeof(long), GFP_KERNEL);
+		if (!ages) continue;
+				
+		host = scsi_register (tpnt, sizeof (struct fcal));
+		if (!host) panic ("Cannot register FCAL host\n");
+				
+		nfcals++;
+				
+		if (fc->module) __MOD_INC_USE_COUNT(fc->module);
+				
+		fcal = (struct fcal *)host->hostdata;
+		
+		fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
+
+		for (i = 0; i < fc->posmap->len; i++) {
+			int status, target, alpa;
+
+			alpa = fc->posmap->list[i];			
+			FCALD(("Sending PLOGI to %02x\n", alpa))
+			target = alpa2target[alpa];
+			status = fc_do_plogi(fc, alpa, fcal->node_wwn + target, 
+					     fcal->nport_wwn + target);
+			FCALD(("PLOGI returned with status %d\n", status))
+			if (status != FC_STATUS_OK)
+				continue;
+			FCALD(("Sending PRLI to %02x\n", alpa))
+			status = fc_do_prli(fc, alpa);
+			FCALD(("PRLI returned with status %d\n", status))
+			if (status == FC_STATUS_OK)
+				fcal->map[target] = 1;
+		}
+		
+		host->max_id = 127;
+		host->irq = fc->irq;
+#ifdef __sparc_v9__
+		host->unchecked_isa_dma = 1;
+#endif
+		host->select_queue_depths = fcal_select_queue_depths;
+
+		fc->channels = 1;
+		fc->targets = 127;
+		fc->ages = ages;
+		memset (ages, 0, 128 * sizeof(long));
+				
+		fcal->fc = fc;
+		
+		FCALD(("Found FCAL\n"))
+	}
+	if (nfcals)
+#ifdef __sparc__
+		printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals);
+#else
+		printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals);
+#endif
+	return nfcals;
+}
+
+int fcal_release(struct Scsi_Host *host)
+{
+	struct fcal *fcal = (struct fcal *)host->hostdata;
+	fc_channel *fc = fcal->fc;
+
+	if (fc->module) __MOD_DEC_USE_COUNT(fc->module);
+	
+	fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
+	FCALND((" releasing fcal.\n"));
+	kfree (fc->ages);
+	FCALND(("released fcal!\n"));
+	return 0;
+}
+
+#undef SPRINTF
+#define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
+
+int fcal_proc_info (char *buffer, char **start, off_t offset, int length, int hostno, int inout)
+{
+	struct Scsi_Host *host = NULL;
+	struct fcal *fcal;
+	fc_channel *fc;
+	char *pos = buffer;
+	int i, j;
+
+	for (host=scsi_hostlist; host; host=host->next)
+		if (host->host_no == hostno)
+                      break;
+
+	if (!host) return -ESRCH;
+
+	if (inout) return length;
+    
+	fcal = (struct fcal *)host->hostdata;
+	fc = fcal->fc;
+
+#ifdef __sparc__
+	SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s\n", fc->name);
+#else
+	SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name);
+#endif
+	SPRINTF ("Initiator AL-PA: %02x\n", fc->sid);
+
+	SPRINTF ("\nAttached devices: %s\n", host->host_queue ? "" : "none");
+	
+	for (i = 0; i < fc->posmap->len; i++) {
+		unsigned char alpa = fc->posmap->list[i];
+		unsigned char target;
+		u32 *u1, *u2;
+		
+		target = alpa2target[alpa];
+		u1 = (u32 *)&fcal->nport_wwn[target];
+		u2 = (u32 *)&fcal->node_wwn[target];
+		if (!u1[0] && !u1[1]) {
+			SPRINTF ("  [AL-PA: %02x] Not responded to PLOGI\n", alpa);
+		} else if (!fcal->map[target]) {
+			SPRINTF ("  [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n",
+				 alpa, u1[0], u1[1], u2[0], u2[1]);
+		} else {
+			Scsi_Device *scd;
+			for (scd = host->host_queue ; scd; scd = scd->next)
+				if (scd->host->host_no == hostno && scd->id == target) {
+					SPRINTF ("  [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x]  ",
+						alpa, target, u1[0], u1[1], u2[0], u2[1]);
+					SPRINTF ("%s ", (scd->type < MAX_SCSI_DEVICE_CODE) ?
+						scsi_device_types[(short) scd->type] : "Unknown device");
+
+					for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++)
+						SPRINTF ("%c", scd->vendor[j]);
+					SPRINTF (" ");
+
+					for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++)
+						SPRINTF ("%c", scd->model[j]);
+		
+					SPRINTF ("\n");
+				}
+		}
+	}
+	SPRINTF ("\n");
+
+	*start = buffer + offset;
+
+	if ((pos - buffer) < offset)
+		return 0;
+	else if (pos - buffer - offset < length)
+		return pos - buffer - offset;
+	else
+		return length;
+}
+
+/* 
+   For FC-AL, we use a simple addressing: we have just one channel 0,
+   and all AL-PAs are mapped to targets 0..0x7e
+ */
+static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
+{
+	struct fcal *f;
+	
+	/* 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] */
+	if (SCpnt->cmnd[1] & 0xe0) return -EINVAL;
+	/* FC-PLDA tells us... */
+	memset(addr, 0, 8);
+	f = (struct fcal *)SCpnt->host->hostdata;
+	if (!f->map[SCpnt->target]) return -EINVAL;
+	/* Now, determine DID: It will be Native Identifier, so we zero upper
+	   2 bytes of the 3 byte DID, lowest byte will be AL-PA */
+	fcmd->did = target2alpa[SCpnt->target];
+	FCALD(("trying DID %06x\n", fcmd->did))
+	return 0;
+}
+
+#ifdef MODULE
+
+Scsi_Host_Template driver_template = FCAL;
+
+#include "scsi_module.c"
+
+EXPORT_NO_SYMBOLS;
+#endif /* MODULE */