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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 struct timer_list fc_timer =
99 TIMER_INITIALIZER(pluto_detect_timeout, 0, 0);
100
101 tpnt->proc_name = "pluto";
102 fcscount = 0;
103 for_each_online_fc_channel(fc) {
104 if (!fc->posmap)
105 fcscount++;
106 }
107 PLND(("%d channels online\n", fcscount))
108 if (!fcscount) {
109#if defined(MODULE) && defined(CONFIG_FC4_SOC_MODULE) && defined(CONFIG_KMOD)
110 request_module("soc");
111
112 for_each_online_fc_channel(fc) {
113 if (!fc->posmap)
114 fcscount++;
115 }
116 if (!fcscount)
117#endif
118 return 0;
119 }
120 fcs = (struct ctrl_inquiry *) kmalloc (sizeof (struct ctrl_inquiry) * fcscount, GFP_DMA);
121 if (!fcs) {
122 printk ("PLUTO: Not enough memory to probe\n");
123 return 0;
124 }
125
126 memset (fcs, 0, sizeof (struct ctrl_inquiry) * fcscount);
127 memset (&dev, 0, sizeof(dev));
128 atomic_set (&fcss, fcscount);
129
130 i = 0;
131 for_each_online_fc_channel(fc) {
132 Scsi_Cmnd *SCpnt;
133 struct Scsi_Host *host;
134 struct pluto *pluto;
135
136 if (i == fcscount) break;
137 if (fc->posmap) continue;
138
139 PLD(("trying to find SSA\n"))
140
141 /* If this is already registered to some other SCSI host, then it cannot be pluto */
142 if (fc->scsi_name[0]) continue;
143 memcpy (fc->scsi_name, "SSA", 4);
144
145 fcs[i].fc = fc;
146
147 fc->can_queue = PLUTO_CAN_QUEUE;
148 fc->rsp_size = 64;
149 fc->encode_addr = pluto_encode_addr;
150
151 fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
152
153 SCpnt = &(fcs[i].cmd);
154 host = &(fcs[i].host);
155 pluto = (struct pluto *)host->hostdata;
156
157 pluto->fc = fc;
158
159 SCpnt->cmnd[0] = INQUIRY;
160 SCpnt->cmnd[4] = 255;
161
162 /* FC layer requires this, so that SCpnt->device->tagged_supported is initially 0 */
163 SCpnt->device = &dev;
164 dev.host = host;
165
166 SCpnt->cmd_len = COMMAND_SIZE(INQUIRY);
167
168 SCpnt->request->rq_status = RQ_SCSI_BUSY;
169
170 SCpnt->done = pluto_detect_done;
171 SCpnt->bufflen = 256;
172 SCpnt->buffer = fcs[i].inquiry;
173 SCpnt->request_bufflen = 256;
174 SCpnt->request_buffer = fcs[i].inquiry;
175 PLD(("set up %d %08lx\n", i, (long)SCpnt))
176 i++;
177 }
178
179 for (retry = 0; retry < 5; retry++) {
180 for (i = 0; i < fcscount; i++) {
181 if (!fcs[i].fc) break;
182 if (fcs[i].cmd.request->rq_status != RQ_SCSI_DONE) {
183 disable_irq(fcs[i].fc->irq);
184 PLND(("queuecommand %d %d\n", retry, i))
185 fcp_scsi_queuecommand (&(fcs[i].cmd),
186 pluto_detect_scsi_done);
187 enable_irq(fcs[i].fc->irq);
188 }
189 }
190
191 fc_timer.expires = jiffies + 10 * HZ;
192 add_timer(&fc_timer);
193
194 down(&fc_sem);
195 PLND(("Woken up\n"))
196 if (!atomic_read(&fcss))
197 break; /* All fc channels have answered us */
198 }
199 del_timer_sync(&fc_timer);
200
201 PLND(("Finished search\n"))
202 for (i = 0, nplutos = 0; i < fcscount; i++) {
203 Scsi_Cmnd *SCpnt;
204
205 if (!(fc = fcs[i].fc)) break;
206
207 SCpnt = &(fcs[i].cmd);
208
209 /* Let FC mid-level free allocated resources */
210 SCpnt->done (SCpnt);
211
212 if (!SCpnt->result) {
213 struct pluto_inquiry *inq;
214 struct pluto *pluto;
215 struct Scsi_Host *host;
216
217 inq = (struct pluto_inquiry *)fcs[i].inquiry;
218
219 if ((inq->dtype & 0x1f) == TYPE_PROCESSOR &&
220 !strncmp (inq->vendor_id, "SUN", 3) &&
221 !strncmp (inq->product_id, "SSA", 3)) {
222 char *p;
223 long *ages;
224
225 ages = kmalloc (((inq->channels + 1) * inq->targets) * sizeof(long), GFP_KERNEL);
226 if (!ages) continue;
227
228 host = scsi_register (tpnt, sizeof (struct pluto));
229 if(!host)
230 {
231 kfree(ages);
232 continue;
233 }
234
235 if (!try_module_get(fc->module)) {
236 kfree(ages);
237 scsi_unregister(host);
238 continue;
239 }
240
241 nplutos++;
242
243 pluto = (struct pluto *)host->hostdata;
244
245 host->max_id = inq->targets;
246 host->max_channel = inq->channels;
247 host->irq = fc->irq;
248
249 fc->channels = inq->channels + 1;
250 fc->targets = inq->targets;
251 fc->ages = ages;
252 memset (ages, 0, ((inq->channels + 1) * inq->targets) * sizeof(long));
253
254 pluto->fc = fc;
255 memcpy (pluto->rev_str, inq->revision, 4);
256 pluto->rev_str[4] = 0;
257 p = strchr (pluto->rev_str, ' ');
258 if (p) *p = 0;
259 memcpy (pluto->fw_rev_str, inq->fw_revision, 4);
260 pluto->fw_rev_str[4] = 0;
261 p = strchr (pluto->fw_rev_str, ' ');
262 if (p) *p = 0;
263 memcpy (pluto->serial_str, inq->serial, 12);
264 pluto->serial_str[12] = 0;
265 p = strchr (pluto->serial_str, ' ');
266 if (p) *p = 0;
267
268 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))
269 } else
270 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
271 } else
272 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
273 }
274 kfree((char *)fcs);
275 if (nplutos)
276 printk ("PLUTO: Total of %d SparcSTORAGE Arrays found\n", nplutos);
277 return nplutos;
278}
279
280int pluto_release(struct Scsi_Host *host)
281{
282 struct pluto *pluto = (struct pluto *)host->hostdata;
283 fc_channel *fc = pluto->fc;
284
285 module_put(fc->module);
286
287 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
288 PLND((" releasing pluto.\n"));
289 kfree (fc->ages);
290 PLND(("released pluto!\n"));
291 return 0;
292}
293
294const char *pluto_info(struct Scsi_Host *host)
295{
296 static char buf[128], *p;
297 struct pluto *pluto = (struct pluto *) host->hostdata;
298
299 sprintf(buf, "SUN SparcSTORAGE Array %s fw %s serial %s %dx%d on %s",
300 pluto->rev_str, pluto->fw_rev_str, pluto->serial_str,
301 host->max_channel, host->max_id, pluto->fc->name);
302#ifdef __sparc__
303 p = strchr(buf, 0);
304 sprintf(p, " PROM node %x", pluto->fc->dev->prom_node);
305#endif
306 return buf;
307}
308
309/* SSA uses this FC4S addressing:
310 switch (addr[0])
311 {
312 case 0: CONTROLLER - All of addr[1]..addr[3] has to be 0
313 case 1: SINGLE DISK - addr[1] channel, addr[2] id, addr[3] 0
314 case 2: DISK GROUP - ???
315 }
316
317 So that SCSI mid-layer can access to these, we reserve
318 channel 0 id 0 lun 0 for CONTROLLER
319 and channels 1 .. max_channel are normal single disks.
320 */
321static int pluto_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
322{
323 PLND(("encode addr %d %d %d\n", SCpnt->device->channel, SCpnt->device->id, SCpnt->cmnd[1] & 0xe0))
324 /* We don't support LUNs - neither does SSA :) */
325 if (SCpnt->cmnd[1] & 0xe0)
326 return -EINVAL;
327 if (!SCpnt->device->channel) {
328 if (SCpnt->device->id)
329 return -EINVAL;
330 memset (addr, 0, 4 * sizeof(u16));
331 } else {
332 addr[0] = 1;
333 addr[1] = SCpnt->device->channel - 1;
334 addr[2] = SCpnt->device->id;
335 addr[3] = 0;
336 }
337 /* We're Point-to-Point, so target it to the default DID */
338 fcmd->did = fc->did;
339 PLND(("trying %04x%04x%04x%04x\n", addr[0], addr[1], addr[2], addr[3]))
340 return 0;
341}
342
343static Scsi_Host_Template driver_template = {
344 .name = "Sparc Storage Array 100/200",
345 .detect = pluto_detect,
346 .release = pluto_release,
347 .info = pluto_info,
348 .queuecommand = fcp_scsi_queuecommand,
349 .slave_configure = pluto_slave_configure,
350 .can_queue = PLUTO_CAN_QUEUE,
351 .this_id = -1,
352 .sg_tablesize = 1,
353 .cmd_per_lun = 1,
354 .use_clustering = ENABLE_CLUSTERING,
355 .eh_abort_handler = fcp_scsi_abort,
356 .eh_device_reset_handler = fcp_scsi_dev_reset,
357 .eh_bus_reset_handler = fcp_scsi_bus_reset,
358 .eh_host_reset_handler = fcp_scsi_host_reset,
359};
360
361#include "scsi_module.c"
362
363MODULE_LICENSE("GPL");
364