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1da177e4 LT |
1 | /* fcal.c: Fibre Channel Arbitrated Loop SCSI host adapter driver. |
2 | * | |
3 | * Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.cz) | |
4 | * | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/delay.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/string.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/blkdev.h> | |
13 | #include <linux/proc_fs.h> | |
14 | #include <linux/stat.h> | |
15 | #include <linux/init.h> | |
1da177e4 LT |
16 | #ifdef CONFIG_KMOD |
17 | #include <linux/kmod.h> | |
18 | #endif | |
19 | ||
20 | #include <asm/irq.h> | |
21 | ||
22 | #include "scsi.h" | |
23 | #include <scsi/scsi_host.h> | |
24 | #include "../fc4/fcp_impl.h" | |
25 | #include "fcal.h" | |
26 | ||
27 | #include <linux/module.h> | |
28 | ||
29 | /* #define FCAL_DEBUG */ | |
30 | ||
31 | #define fcal_printk printk ("FCAL %s: ", fc->name); printk | |
32 | ||
33 | #ifdef FCAL_DEBUG | |
34 | #define FCALD(x) fcal_printk x; | |
35 | #define FCALND(x) printk ("FCAL: "); printk x; | |
36 | #else | |
37 | #define FCALD(x) | |
38 | #define FCALND(x) | |
39 | #endif | |
40 | ||
41 | static unsigned char alpa2target[] = { | |
42 | 0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79, | |
43 | 0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72, | |
44 | 0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff, | |
45 | 0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff, | |
46 | 0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff, | |
47 | 0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff, | |
48 | 0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff, | |
49 | 0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff, | |
50 | 0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33, | |
51 | 0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c, | |
52 | 0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff, | |
53 | 0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff, | |
54 | 0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff, | |
55 | 0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff, | |
56 | 0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 | |
57 | }; | |
58 | ||
59 | static unsigned char target2alpa[] = { | |
60 | 0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce, | |
61 | 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3, | |
62 | 0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b, | |
63 | 0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73, | |
64 | 0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56, | |
65 | 0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c, | |
66 | 0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26, | |
67 | 0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00 | |
68 | }; | |
69 | ||
70 | static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd); | |
71 | ||
f64a181d | 72 | int fcal_slave_configure(struct scsi_device *device) |
1da177e4 LT |
73 | { |
74 | int depth_to_use; | |
75 | ||
76 | if (device->tagged_supported) | |
77 | depth_to_use = /* 254 */ 8; | |
78 | else | |
79 | depth_to_use = 2; | |
80 | ||
81 | scsi_adjust_queue_depth(device, | |
82 | (device->tagged_supported ? | |
83 | MSG_SIMPLE_TAG : 0), | |
84 | depth_to_use); | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | /* Detect all FC Arbitrated Loops attached to the machine. | |
90 | fc4 module has done all the work for us... */ | |
d0be4a7d | 91 | int __init fcal_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
92 | { |
93 | int nfcals = 0; | |
94 | fc_channel *fc; | |
95 | int fcalcount; | |
96 | int i; | |
97 | ||
98 | tpnt->proc_name = "fcal"; | |
99 | fcalcount = 0; | |
100 | for_each_online_fc_channel(fc) | |
101 | if (fc->posmap) | |
102 | fcalcount++; | |
103 | FCALND(("%d channels online\n", fcalcount)) | |
104 | if (!fcalcount) { | |
105 | #if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD) | |
106 | request_module("socal"); | |
107 | ||
108 | for_each_online_fc_channel(fc) | |
109 | if (fc->posmap) | |
110 | fcalcount++; | |
111 | if (!fcalcount) | |
112 | #endif | |
113 | return 0; | |
114 | } | |
115 | for_each_online_fc_channel(fc) { | |
116 | struct Scsi_Host *host; | |
117 | long *ages; | |
118 | struct fcal *fcal; | |
119 | ||
120 | if (!fc->posmap) continue; | |
121 | ||
122 | /* Strange, this is already registered to some other SCSI host, then it cannot be fcal */ | |
123 | if (fc->scsi_name[0]) continue; | |
124 | memcpy (fc->scsi_name, "FCAL", 4); | |
125 | ||
126 | fc->can_queue = FCAL_CAN_QUEUE; | |
127 | fc->rsp_size = 64; | |
128 | fc->encode_addr = fcal_encode_addr; | |
129 | ||
130 | ages = kmalloc (128 * sizeof(long), GFP_KERNEL); | |
131 | if (!ages) continue; | |
132 | ||
133 | host = scsi_register (tpnt, sizeof (struct fcal)); | |
134 | if (!host) | |
135 | { | |
136 | kfree(ages); | |
137 | continue; | |
138 | } | |
139 | ||
140 | if (!try_module_get(fc->module)) { | |
141 | kfree(ages); | |
142 | scsi_unregister(host); | |
143 | continue; | |
144 | } | |
145 | ||
146 | nfcals++; | |
147 | ||
148 | fcal = (struct fcal *)host->hostdata; | |
149 | ||
150 | fc->fcp_register(fc, TYPE_SCSI_FCP, 0); | |
151 | ||
152 | for (i = 0; i < fc->posmap->len; i++) { | |
153 | int status, target, alpa; | |
154 | ||
155 | alpa = fc->posmap->list[i]; | |
156 | FCALD(("Sending PLOGI to %02x\n", alpa)) | |
157 | target = alpa2target[alpa]; | |
158 | status = fc_do_plogi(fc, alpa, fcal->node_wwn + target, | |
159 | fcal->nport_wwn + target); | |
160 | FCALD(("PLOGI returned with status %d\n", status)) | |
161 | if (status != FC_STATUS_OK) | |
162 | continue; | |
163 | FCALD(("Sending PRLI to %02x\n", alpa)) | |
164 | status = fc_do_prli(fc, alpa); | |
165 | FCALD(("PRLI returned with status %d\n", status)) | |
166 | if (status == FC_STATUS_OK) | |
167 | fcal->map[target] = 1; | |
168 | } | |
169 | ||
170 | host->max_id = 127; | |
171 | host->irq = fc->irq; | |
172 | #ifdef __sparc_v9__ | |
173 | host->unchecked_isa_dma = 1; | |
174 | #endif | |
175 | ||
176 | fc->channels = 1; | |
177 | fc->targets = 127; | |
178 | fc->ages = ages; | |
179 | memset (ages, 0, 128 * sizeof(long)); | |
180 | ||
181 | fcal->fc = fc; | |
182 | ||
183 | FCALD(("Found FCAL\n")) | |
184 | } | |
185 | if (nfcals) | |
186 | #ifdef __sparc__ | |
187 | printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals); | |
188 | #else | |
189 | printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals); | |
190 | #endif | |
191 | return nfcals; | |
192 | } | |
193 | ||
194 | int fcal_release(struct Scsi_Host *host) | |
195 | { | |
196 | struct fcal *fcal = (struct fcal *)host->hostdata; | |
197 | fc_channel *fc = fcal->fc; | |
198 | ||
199 | module_put(fc->module); | |
200 | ||
201 | fc->fcp_register(fc, TYPE_SCSI_FCP, 1); | |
202 | FCALND((" releasing fcal.\n")); | |
203 | kfree (fc->ages); | |
204 | FCALND(("released fcal!\n")); | |
205 | return 0; | |
206 | } | |
207 | ||
208 | #undef SPRINTF | |
209 | #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); } | |
210 | ||
211 | int fcal_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout) | |
212 | { | |
213 | struct fcal *fcal; | |
214 | fc_channel *fc; | |
215 | char *pos = buffer; | |
216 | int i, j; | |
217 | ||
218 | if (inout) return length; | |
219 | ||
220 | fcal = (struct fcal *)host->hostdata; | |
221 | fc = fcal->fc; | |
222 | ||
223 | #ifdef __sparc__ | |
224 | SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s PROM node %x\n", fc->name, fc->dev->prom_node); | |
225 | #else | |
226 | SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name); | |
227 | #endif | |
228 | SPRINTF ("Initiator AL-PA: %02x\n", fc->sid); | |
229 | ||
230 | SPRINTF ("\nAttached devices:\n"); | |
231 | ||
232 | for (i = 0; i < fc->posmap->len; i++) { | |
233 | unsigned char alpa = fc->posmap->list[i]; | |
234 | unsigned char target; | |
235 | u32 *u1, *u2; | |
236 | ||
237 | target = alpa2target[alpa]; | |
238 | u1 = (u32 *)&fcal->nport_wwn[target]; | |
239 | u2 = (u32 *)&fcal->node_wwn[target]; | |
240 | if (!u1[0] && !u1[1]) { | |
241 | SPRINTF (" [AL-PA: %02x] Not responded to PLOGI\n", alpa); | |
242 | } else if (!fcal->map[target]) { | |
243 | SPRINTF (" [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n", | |
244 | alpa, u1[0], u1[1], u2[0], u2[1]); | |
245 | } else { | |
f64a181d | 246 | struct scsi_device *scd; |
1da177e4 LT |
247 | shost_for_each_device(scd, host) |
248 | if (scd->id == target) { | |
249 | SPRINTF (" [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x] ", | |
250 | alpa, target, u1[0], u1[1], u2[0], u2[1]); | |
251 | SPRINTF ("%s ", (scd->type < MAX_SCSI_DEVICE_CODE) ? | |
252 | scsi_device_types[(short) scd->type] : "Unknown device"); | |
253 | ||
254 | for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++) | |
255 | SPRINTF ("%c", scd->vendor[j]); | |
256 | SPRINTF (" "); | |
257 | ||
258 | for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++) | |
259 | SPRINTF ("%c", scd->model[j]); | |
260 | ||
261 | SPRINTF ("\n"); | |
262 | } | |
263 | } | |
264 | } | |
265 | SPRINTF ("\n"); | |
266 | ||
267 | *start = buffer + offset; | |
268 | ||
269 | if ((pos - buffer) < offset) | |
270 | return 0; | |
271 | else if (pos - buffer - offset < length) | |
272 | return pos - buffer - offset; | |
273 | else | |
274 | return length; | |
275 | } | |
276 | ||
277 | /* | |
278 | For FC-AL, we use a simple addressing: we have just one channel 0, | |
279 | and all AL-PAs are mapped to targets 0..0x7e | |
280 | */ | |
281 | static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd) | |
282 | { | |
283 | struct fcal *f; | |
284 | ||
285 | /* 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] */ | |
286 | if (SCpnt->cmnd[1] & 0xe0) return -EINVAL; | |
287 | /* FC-PLDA tells us... */ | |
288 | memset(addr, 0, 8); | |
289 | f = (struct fcal *)SCpnt->device->host->hostdata; | |
290 | if (!f->map[SCpnt->device->id]) | |
291 | return -EINVAL; | |
292 | /* Now, determine DID: It will be Native Identifier, so we zero upper | |
293 | 2 bytes of the 3 byte DID, lowest byte will be AL-PA */ | |
294 | fcmd->did = target2alpa[SCpnt->device->id]; | |
295 | FCALD(("trying DID %06x\n", fcmd->did)) | |
296 | return 0; | |
297 | } | |
298 | ||
d0be4a7d | 299 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
300 | .name = "Fibre Channel Arbitrated Loop", |
301 | .detect = fcal_detect, | |
302 | .release = fcal_release, | |
303 | .proc_info = fcal_proc_info, | |
304 | .queuecommand = fcp_scsi_queuecommand, | |
305 | .slave_configure = fcal_slave_configure, | |
306 | .can_queue = FCAL_CAN_QUEUE, | |
307 | .this_id = -1, | |
308 | .sg_tablesize = 1, | |
309 | .cmd_per_lun = 1, | |
310 | .use_clustering = ENABLE_CLUSTERING, | |
311 | .eh_abort_handler = fcp_scsi_abort, | |
312 | .eh_device_reset_handler = fcp_scsi_dev_reset, | |
1da177e4 LT |
313 | .eh_host_reset_handler = fcp_scsi_host_reset, |
314 | }; | |
315 | #include "scsi_module.c" | |
316 | ||
317 | MODULE_LICENSE("GPL"); | |
318 |