summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/fcal.c
blob: d7ebcce4f255cc7d52e3c0e71f8bf8fe19d3b264 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/* 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/slab.h>
#include <linux/blkdev.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 <scsi/scsi_host.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
};

static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);

int fcal_slave_configure(Scsi_Device *device)
{
	int depth_to_use;
	
	if (device->tagged_supported)
		depth_to_use = /* 254 */ 8;
	else
		depth_to_use = 2;

	scsi_adjust_queue_depth(device,
				(device->tagged_supported ?
				 MSG_SIMPLE_TAG : 0),
				depth_to_use);

	return 0;
}

/* Detect all FC Arbitrated Loops attached to the machine.
   fc4 module has done all the work for us... */
int __init fcal_detect(struct scsi_host_template *tpnt)
{
	int nfcals = 0;
	fc_channel *fc;
	int fcalcount;
	int i;

	tpnt->proc_name = "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) 
		{
			kfree(ages);
			continue;
		}
				
		if (!try_module_get(fc->module)) {
			kfree(ages);
			scsi_unregister(host);
			continue;
		}
	
		nfcals++;
				
		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

		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;

	module_put(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 (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
{
	struct fcal *fcal;
	fc_channel *fc;
	char *pos = buffer;
	int i, j;

	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 PROM node %x\n", fc->name, fc->dev->prom_node);
#else
	SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name);
#endif
	SPRINTF ("Initiator AL-PA: %02x\n", fc->sid);

	SPRINTF ("\nAttached devices:\n");
	
	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;
			shost_for_each_device(scd, host)
				if (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->device->host->hostdata;
	if (!f->map[SCpnt->device->id])
		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->device->id];
	FCALD(("trying DID %06x\n", fcmd->did))
	return 0;
}

static struct scsi_host_template driver_template = {
	.name			= "Fibre Channel Arbitrated Loop",
	.detect			= fcal_detect,
	.release		= fcal_release,	
	.proc_info		= fcal_proc_info,
	.queuecommand		= fcp_scsi_queuecommand,
	.slave_configure	= fcal_slave_configure,
	.can_queue		= FCAL_CAN_QUEUE,
	.this_id		= -1,
	.sg_tablesize		= 1,
	.cmd_per_lun		= 1,
	.use_clustering		= ENABLE_CLUSTERING,
	.eh_abort_handler	= fcp_scsi_abort,
	.eh_device_reset_handler = fcp_scsi_dev_reset,
	.eh_host_reset_handler	= fcp_scsi_host_reset,
};
#include "scsi_module.c"

MODULE_LICENSE("GPL");

OpenPOWER on IntegriCloud