[SCSI] remove Scsi_Host_Template typedef
[linux-2.6.git] / drivers / scsi / pluto.c
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
42 static 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;
49 static int fcscount __initdata = 0;
50 static atomic_t fcss __initdata = ATOMIC_INIT(0);
51 DECLARE_MUTEX_LOCKED(fc_sem);
52
53 static int pluto_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
54
55 static void __init pluto_detect_timeout(unsigned long data)
56 {
57         PLND(("Timeout\n"))
58         up(&fc_sem);
59 }
60
61 static void __init pluto_detect_done(Scsi_Cmnd *SCpnt)
62 {
63         /* Do nothing */
64 }
65
66 static 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
74 int 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. */
93 int __init pluto_detect(struct 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
279 int 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
293 const 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  */
320 static 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
342 static struct 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
361 MODULE_LICENSE("GPL");
362