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