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1/* pluto.c: SparcSTORAGE Array SCSI host adapter driver.
2 *
3 * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@sunsite.mff.cuni.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>
16#include <linux/config.h>
17#ifdef CONFIG_KMOD
18#include <linux/kmod.h>
19#endif
20
21#include <asm/irq.h>
22
23#include "scsi.h"
24#include <scsi/scsi_host.h>
25#include "../fc4/fcp_impl.h"
26#include "pluto.h"
27
28#include <linux/module.h>
29
30/* #define PLUTO_DEBUG */
31
32#define pluto_printk printk ("PLUTO %s: ", fc->name); printk
33
34#ifdef PLUTO_DEBUG
35#define PLD(x) pluto_printk x;
36#define PLND(x) printk ("PLUTO: "); printk x;
37#else
38#define PLD(x)
39#define PLND(x)
40#endif
41
42static struct ctrl_inquiry {
43 struct Scsi_Host host;
44 struct pluto pluto;
45 Scsi_Cmnd cmd;
46 char inquiry[256];
47 fc_channel *fc;
48} *fcs __initdata;
49static int fcscount __initdata = 0;
50static atomic_t fcss __initdata = ATOMIC_INIT(0);
51DECLARE_MUTEX_LOCKED(fc_sem);
52
53static int pluto_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
54
55static void __init pluto_detect_timeout(unsigned long data)
56{
57 PLND(("Timeout\n"))
58 up(&fc_sem);
59}
60
61static void __init pluto_detect_done(Scsi_Cmnd *SCpnt)
62{
63 /* Do nothing */
64}
65
66static void __init pluto_detect_scsi_done(Scsi_Cmnd *SCpnt)
67{
68 SCpnt->request->rq_status = RQ_SCSI_DONE;
69 PLND(("Detect done %08lx\n", (long)SCpnt))
70 if (atomic_dec_and_test (&fcss))
71 up(&fc_sem);
72}
73
74int pluto_slave_configure(Scsi_Device *device)
75{
76 int depth_to_use;
77
78 if (device->tagged_supported)
79 depth_to_use = /* 254 */ 8;
80 else
81 depth_to_use = 2;
82
83 scsi_adjust_queue_depth(device,
84 (device->tagged_supported ?
85 MSG_SIMPLE_TAG : 0),
86 depth_to_use);
87
88 return 0;
89}
90
91/* Detect all SSAs attached to the machine.
92 To be fast, do it on all online FC channels at the same time. */
93int __init pluto_detect(Scsi_Host_Template *tpnt)
94{
95 int i, retry, nplutos;
96 fc_channel *fc;
97 Scsi_Device dev;
98 DEFINE_TIMER(fc_timer, pluto_detect_timeout, 0, 0);
99
100 tpnt->proc_name = "pluto";
101 fcscount = 0;
102 for_each_online_fc_channel(fc) {
103 if (!fc->posmap)
104 fcscount++;
105 }
106 PLND(("%d channels online\n", fcscount))
107 if (!fcscount) {
108#if defined(MODULE) && defined(CONFIG_FC4_SOC_MODULE) && defined(CONFIG_KMOD)
109 request_module("soc");
110
111 for_each_online_fc_channel(fc) {
112 if (!fc->posmap)
113 fcscount++;
114 }
115 if (!fcscount)
116#endif
117 return 0;
118 }
119 fcs = (struct ctrl_inquiry *) kmalloc (sizeof (struct ctrl_inquiry) * fcscount, GFP_DMA);
120 if (!fcs) {
121 printk ("PLUTO: Not enough memory to probe\n");
122 return 0;
123 }
124
125 memset (fcs, 0, sizeof (struct ctrl_inquiry) * fcscount);
126 memset (&dev, 0, sizeof(dev));
127 atomic_set (&fcss, fcscount);
128
129 i = 0;
130 for_each_online_fc_channel(fc) {
131 Scsi_Cmnd *SCpnt;
132 struct Scsi_Host *host;
133 struct pluto *pluto;
134
135 if (i == fcscount) break;
136 if (fc->posmap) continue;
137
138 PLD(("trying to find SSA\n"))
139
140 /* If this is already registered to some other SCSI host, then it cannot be pluto */
141 if (fc->scsi_name[0]) continue;
142 memcpy (fc->scsi_name, "SSA", 4);
143
144 fcs[i].fc = fc;
145
146 fc->can_queue = PLUTO_CAN_QUEUE;
147 fc->rsp_size = 64;
148 fc->encode_addr = pluto_encode_addr;
149
150 fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
151
152 SCpnt = &(fcs[i].cmd);
153 host = &(fcs[i].host);
154 pluto = (struct pluto *)host->hostdata;
155
156 pluto->fc = fc;
157
158 SCpnt->cmnd[0] = INQUIRY;
159 SCpnt->cmnd[4] = 255;
160
161 /* FC layer requires this, so that SCpnt->device->tagged_supported is initially 0 */
162 SCpnt->device = &dev;
163 dev.host = host;
164
165 SCpnt->cmd_len = COMMAND_SIZE(INQUIRY);
166
167 SCpnt->request->rq_status = RQ_SCSI_BUSY;
168
169 SCpnt->done = pluto_detect_done;
170 SCpnt->bufflen = 256;
171 SCpnt->buffer = fcs[i].inquiry;
172 SCpnt->request_bufflen = 256;
173 SCpnt->request_buffer = fcs[i].inquiry;
174 PLD(("set up %d %08lx\n", i, (long)SCpnt))
175 i++;
176 }
177
178 for (retry = 0; retry < 5; retry++) {
179 for (i = 0; i < fcscount; i++) {
180 if (!fcs[i].fc) break;
181 if (fcs[i].cmd.request->rq_status != RQ_SCSI_DONE) {
182 disable_irq(fcs[i].fc->irq);
183 PLND(("queuecommand %d %d\n", retry, i))
184 fcp_scsi_queuecommand (&(fcs[i].cmd),
185 pluto_detect_scsi_done);
186 enable_irq(fcs[i].fc->irq);
187 }
188 }
189
190 fc_timer.expires = jiffies + 10 * HZ;
191 add_timer(&fc_timer);
192
193 down(&fc_sem);
194 PLND(("Woken up\n"))
195 if (!atomic_read(&fcss))
196 break; /* All fc channels have answered us */
197 }
198 del_timer_sync(&fc_timer);
199
200 PLND(("Finished search\n"))
201 for (i = 0, nplutos = 0; i < fcscount; i++) {
202 Scsi_Cmnd *SCpnt;
203
204 if (!(fc = fcs[i].fc)) break;
205
206 SCpnt = &(fcs[i].cmd);
207
208 /* Let FC mid-level free allocated resources */
209 SCpnt->done (SCpnt);
210
211 if (!SCpnt->result) {
212 struct pluto_inquiry *inq;
213 struct pluto *pluto;
214 struct Scsi_Host *host;
215
216 inq = (struct pluto_inquiry *)fcs[i].inquiry;
217
218 if ((inq->dtype & 0x1f) == TYPE_PROCESSOR &&
219 !strncmp (inq->vendor_id, "SUN", 3) &&
220 !strncmp (inq->product_id, "SSA", 3)) {
221 char *p;
222 long *ages;
223
224 ages = kmalloc (((inq->channels + 1) * inq->targets) * sizeof(long), GFP_KERNEL);
225 if (!ages) continue;
226
227 host = scsi_register (tpnt, sizeof (struct pluto));
228 if(!host)
229 {
230 kfree(ages);
231 continue;
232 }
233
234 if (!try_module_get(fc->module)) {
235 kfree(ages);
236 scsi_unregister(host);
237 continue;
238 }
239
240 nplutos++;
241
242 pluto = (struct pluto *)host->hostdata;
243
244 host->max_id = inq->targets;
245 host->max_channel = inq->channels;
246 host->irq = fc->irq;
247
248 fc->channels = inq->channels + 1;
249 fc->targets = inq->targets;
250 fc->ages = ages;
251 memset (ages, 0, ((inq->channels + 1) * inq->targets) * sizeof(long));
252
253 pluto->fc = fc;
254 memcpy (pluto->rev_str, inq->revision, 4);
255 pluto->rev_str[4] = 0;
256 p = strchr (pluto->rev_str, ' ');
257 if (p) *p = 0;
258 memcpy (pluto->fw_rev_str, inq->fw_revision, 4);
259 pluto->fw_rev_str[4] = 0;
260 p = strchr (pluto->fw_rev_str, ' ');
261 if (p) *p = 0;
262 memcpy (pluto->serial_str, inq->serial, 12);
263 pluto->serial_str[12] = 0;
264 p = strchr (pluto->serial_str, ' ');
265 if (p) *p = 0;
266
267 PLD(("Found SSA rev %s fw rev %s serial %s %dx%d\n", pluto->rev_str, pluto->fw_rev_str, pluto->serial_str, host->max_channel, host->max_id))
268 } else
269 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
270 } else
271 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
272 }
273 kfree((char *)fcs);
274 if (nplutos)
275 printk ("PLUTO: Total of %d SparcSTORAGE Arrays found\n", nplutos);
276 return nplutos;
277}
278
279int pluto_release(struct Scsi_Host *host)
280{
281 struct pluto *pluto = (struct pluto *)host->hostdata;
282 fc_channel *fc = pluto->fc;
283
284 module_put(fc->module);
285
286 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
287 PLND((" releasing pluto.\n"));
288 kfree (fc->ages);
289 PLND(("released pluto!\n"));
290 return 0;
291}
292
293const char *pluto_info(struct Scsi_Host *host)
294{
295 static char buf[128], *p;
296 struct pluto *pluto = (struct pluto *) host->hostdata;
297
298 sprintf(buf, "SUN SparcSTORAGE Array %s fw %s serial %s %dx%d on %s",
299 pluto->rev_str, pluto->fw_rev_str, pluto->serial_str,
300 host->max_channel, host->max_id, pluto->fc->name);
301#ifdef __sparc__
302 p = strchr(buf, 0);
303 sprintf(p, " PROM node %x", pluto->fc->dev->prom_node);
304#endif
305 return buf;
306}
307
308/* SSA uses this FC4S addressing:
309 switch (addr[0])
310 {
311 case 0: CONTROLLER - All of addr[1]..addr[3] has to be 0
312 case 1: SINGLE DISK - addr[1] channel, addr[2] id, addr[3] 0
313 case 2: DISK GROUP - ???
314 }
315
316 So that SCSI mid-layer can access to these, we reserve
317 channel 0 id 0 lun 0 for CONTROLLER
318 and channels 1 .. max_channel are normal single disks.
319 */
320static int pluto_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
321{
322 PLND(("encode addr %d %d %d\n", SCpnt->device->channel, SCpnt->device->id, SCpnt->cmnd[1] & 0xe0))
323 /* We don't support LUNs - neither does SSA :) */
324 if (SCpnt->cmnd[1] & 0xe0)
325 return -EINVAL;
326 if (!SCpnt->device->channel) {
327 if (SCpnt->device->id)
328 return -EINVAL;
329 memset (addr, 0, 4 * sizeof(u16));
330 } else {
331 addr[0] = 1;
332 addr[1] = SCpnt->device->channel - 1;
333 addr[2] = SCpnt->device->id;
334 addr[3] = 0;
335 }
336 /* We're Point-to-Point, so target it to the default DID */
337 fcmd->did = fc->did;
338 PLND(("trying %04x%04x%04x%04x\n", addr[0], addr[1], addr[2], addr[3]))
339 return 0;
340}
341
342static Scsi_Host_Template driver_template = {
343 .name = "Sparc Storage Array 100/200",
344 .detect = pluto_detect,
345 .release = pluto_release,
346 .info = pluto_info,
347 .queuecommand = fcp_scsi_queuecommand,
348 .slave_configure = pluto_slave_configure,
349 .can_queue = PLUTO_CAN_QUEUE,
350 .this_id = -1,
351 .sg_tablesize = 1,
352 .cmd_per_lun = 1,
353 .use_clustering = ENABLE_CLUSTERING,
354 .eh_abort_handler = fcp_scsi_abort,
355 .eh_device_reset_handler = fcp_scsi_dev_reset,
356 .eh_host_reset_handler = fcp_scsi_host_reset,
357};
358
359#include "scsi_module.c"
360
361MODULE_LICENSE("GPL");
362