Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / drivers / scsi / aacraid / comminit.c
1 /*
2  *      Adaptec AAC series RAID controller driver
3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
4  *
5  * based on the old aacraid driver that is..
6  * Adaptec aacraid device driver for Linux.
7  *
8  * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com)
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2, or (at your option)
13  * any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; see the file COPYING.  If not, write to
22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23  *
24  * Module Name:
25  *  comminit.c
26  *
27  * Abstract: This supports the initialization of the host adapter commuication interface.
28  *    This is a platform dependent module for the pci cyclone board.
29  *
30  */
31
32 #include <linux/kernel.h>
33 #include <linux/init.h>
34 #include <linux/types.h>
35 #include <linux/pci.h>
36 #include <linux/spinlock.h>
37 #include <linux/slab.h>
38 #include <linux/blkdev.h>
39 #include <linux/completion.h>
40 #include <linux/mm.h>
41 #include <scsi/scsi_host.h>
42
43 #include "aacraid.h"
44
45 struct aac_common aac_config = {
46         .irq_mod = 1
47 };
48
49 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
50 {
51         unsigned char *base;
52         unsigned long size, align;
53         const unsigned long fibsize = 4096;
54         const unsigned long printfbufsiz = 256;
55         struct aac_init *init;
56         dma_addr_t phys;
57
58         size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
59
60  
61         base = pci_alloc_consistent(dev->pdev, size, &phys);
62
63         if(base == NULL)
64         {
65                 printk(KERN_ERR "aacraid: unable to create mapping.\n");
66                 return 0;
67         }
68         dev->comm_addr = (void *)base;
69         dev->comm_phys = phys;
70         dev->comm_size = size;
71         
72         dev->init = (struct aac_init *)(base + fibsize);
73         dev->init_pa = phys + fibsize;
74
75         init = dev->init;
76
77         init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
78         if (dev->max_fib_size != sizeof(struct hw_fib))
79                 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
80         init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
81         init->fsrev = cpu_to_le32(dev->fsrev);
82
83         /*
84          *      Adapter Fibs are the first thing allocated so that they
85          *      start page aligned
86          */
87         dev->aif_base_va = (struct hw_fib *)base;
88         
89         init->AdapterFibsVirtualAddress = 0;
90         init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
91         init->AdapterFibsSize = cpu_to_le32(fibsize);
92         init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
93         init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
94
95         init->InitFlags = 0;
96         if (dev->comm_interface == AAC_COMM_MESSAGE) {
97                 init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
98                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
99         }
100         init->InitFlags |= cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
101                                        INITFLAGS_DRIVER_SUPPORTS_PM);
102         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
103         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
104         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
105
106         /*
107          * Increment the base address by the amount already used
108          */
109         base = base + fibsize + sizeof(struct aac_init);
110         phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
111         /*
112          *      Align the beginning of Headers to commalign
113          */
114         align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
115         base = base + align;
116         phys = phys + align;
117         /*
118          *      Fill in addresses of the Comm Area Headers and Queues
119          */
120         *commaddr = base;
121         init->CommHeaderAddress = cpu_to_le32((u32)phys);
122         /*
123          *      Increment the base address by the size of the CommArea
124          */
125         base = base + commsize;
126         phys = phys + commsize;
127         /*
128          *       Place the Printf buffer area after the Fast I/O comm area.
129          */
130         dev->printfbuf = (void *)base;
131         init->printfbuf = cpu_to_le32(phys);
132         init->printfbufsiz = cpu_to_le32(printfbufsiz);
133         memset(base, 0, printfbufsiz);
134         return 1;
135 }
136     
137 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
138 {
139         q->numpending = 0;
140         q->dev = dev;
141         init_waitqueue_head(&q->cmdready);
142         INIT_LIST_HEAD(&q->cmdq);
143         init_waitqueue_head(&q->qfull);
144         spin_lock_init(&q->lockdata);
145         q->lock = &q->lockdata;
146         q->headers.producer = (__le32 *)mem;
147         q->headers.consumer = (__le32 *)(mem+1);
148         *(q->headers.producer) = cpu_to_le32(qsize);
149         *(q->headers.consumer) = cpu_to_le32(qsize);
150         q->entries = qsize;
151 }
152
153 /**
154  *      aac_send_shutdown               -       shutdown an adapter
155  *      @dev: Adapter to shutdown
156  *
157  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
158  */
159
160 int aac_send_shutdown(struct aac_dev * dev)
161 {
162         struct fib * fibctx;
163         struct aac_close *cmd;
164         int status;
165
166         fibctx = aac_fib_alloc(dev);
167         if (!fibctx)
168                 return -ENOMEM;
169         aac_fib_init(fibctx);
170
171         cmd = (struct aac_close *) fib_data(fibctx);
172
173         cmd->command = cpu_to_le32(VM_CloseAll);
174         cmd->cid = cpu_to_le32(0xffffffff);
175
176         status = aac_fib_send(ContainerCommand,
177                           fibctx,
178                           sizeof(struct aac_close),
179                           FsaNormal,
180                           -2 /* Timeout silently */, 1,
181                           NULL, NULL);
182
183         if (status >= 0)
184                 aac_fib_complete(fibctx);
185         aac_fib_free(fibctx);
186         return status;
187 }
188
189 /**
190  *      aac_comm_init   -       Initialise FSA data structures
191  *      @dev:   Adapter to initialise
192  *
193  *      Initializes the data structures that are required for the FSA commuication
194  *      interface to operate. 
195  *      Returns
196  *              1 - if we were able to init the commuication interface.
197  *              0 - If there were errors initing. This is a fatal error.
198  */
199  
200 static int aac_comm_init(struct aac_dev * dev)
201 {
202         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
203         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
204         u32 *headers;
205         struct aac_entry * queues;
206         unsigned long size;
207         struct aac_queue_block * comm = dev->queues;
208         /*
209          *      Now allocate and initialize the zone structures used as our 
210          *      pool of FIB context records.  The size of the zone is based
211          *      on the system memory size.  We also initialize the mutex used
212          *      to protect the zone.
213          */
214         spin_lock_init(&dev->fib_lock);
215
216         /*
217          *      Allocate the physically contigous space for the commuication
218          *      queue headers. 
219          */
220
221         size = hdrsize + queuesize;
222
223         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
224                 return -ENOMEM;
225
226         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
227
228         /* Adapter to Host normal priority Command queue */ 
229         comm->queue[HostNormCmdQueue].base = queues;
230         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
231         queues += HOST_NORM_CMD_ENTRIES;
232         headers += 2;
233
234         /* Adapter to Host high priority command queue */
235         comm->queue[HostHighCmdQueue].base = queues;
236         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
237     
238         queues += HOST_HIGH_CMD_ENTRIES;
239         headers +=2;
240
241         /* Host to adapter normal priority command queue */
242         comm->queue[AdapNormCmdQueue].base = queues;
243         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
244     
245         queues += ADAP_NORM_CMD_ENTRIES;
246         headers += 2;
247
248         /* host to adapter high priority command queue */
249         comm->queue[AdapHighCmdQueue].base = queues;
250         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
251     
252         queues += ADAP_HIGH_CMD_ENTRIES;
253         headers += 2;
254
255         /* adapter to host normal priority response queue */
256         comm->queue[HostNormRespQueue].base = queues;
257         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
258         queues += HOST_NORM_RESP_ENTRIES;
259         headers += 2;
260
261         /* adapter to host high priority response queue */
262         comm->queue[HostHighRespQueue].base = queues;
263         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
264    
265         queues += HOST_HIGH_RESP_ENTRIES;
266         headers += 2;
267
268         /* host to adapter normal priority response queue */
269         comm->queue[AdapNormRespQueue].base = queues;
270         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
271
272         queues += ADAP_NORM_RESP_ENTRIES;
273         headers += 2;
274         
275         /* host to adapter high priority response queue */ 
276         comm->queue[AdapHighRespQueue].base = queues;
277         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
278
279         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
280         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
281         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
282         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
283
284         return 0;
285 }
286
287 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
288 {
289         u32 status[5];
290         struct Scsi_Host * host = dev->scsi_host_ptr;
291
292         /*
293          *      Check the preferred comm settings, defaults from template.
294          */
295         dev->max_fib_size = sizeof(struct hw_fib);
296         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
297                 - sizeof(struct aac_fibhdr)
298                 - sizeof(struct aac_write) + sizeof(struct sgentry))
299                         / sizeof(struct sgentry);
300         dev->comm_interface = AAC_COMM_PRODUCER;
301         dev->raw_io_64 = 0;
302         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
303                 0, 0, 0, 0, 0, 0, status+0, status+1, status+2, NULL, NULL)) &&
304                         (status[0] == 0x00000001)) {
305                 if (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_64))
306                         dev->raw_io_64 = 1;
307                 if (dev->a_ops.adapter_comm &&
308                     (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM)))
309                         dev->comm_interface = AAC_COMM_MESSAGE;
310                 if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
311                     (status[2] > dev->base_size)) {
312                         aac_adapter_ioremap(dev, 0);
313                         dev->base_size = status[2];
314                         if (aac_adapter_ioremap(dev, status[2])) {
315                                 /* remap failed, go back ... */
316                                 dev->comm_interface = AAC_COMM_PRODUCER;
317                                 if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
318                                         printk(KERN_WARNING
319                                           "aacraid: unable to map adapter.\n");
320                                         return NULL;
321                                 }
322                         }
323                 }
324         }
325         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
326           0, 0, 0, 0, 0, 0,
327           status+0, status+1, status+2, status+3, status+4))
328          && (status[0] == 0x00000001)) {
329                 /*
330                  *      status[1] >> 16         maximum command size in KB
331                  *      status[1] & 0xFFFF      maximum FIB size
332                  *      status[2] >> 16         maximum SG elements to driver
333                  *      status[2] & 0xFFFF      maximum SG elements from driver
334                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
335                  */
336                 host->max_sectors = (status[1] >> 16) << 1;
337                 dev->max_fib_size = status[1] & 0xFFFF;
338                 host->sg_tablesize = status[2] >> 16;
339                 dev->sg_tablesize = status[2] & 0xFFFF;
340                 host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
341                 /*
342                  *      NOTE:
343                  *      All these overrides are based on a fixed internal
344                  *      knowledge and understanding of existing adapters,
345                  *      acbsize should be set with caution.
346                  */
347                 if (acbsize == 512) {
348                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
349                         dev->max_fib_size = 512;
350                         dev->sg_tablesize = host->sg_tablesize
351                           = (512 - sizeof(struct aac_fibhdr)
352                             - sizeof(struct aac_write) + sizeof(struct sgentry))
353                              / sizeof(struct sgentry);
354                         host->can_queue = AAC_NUM_IO_FIB;
355                 } else if (acbsize == 2048) {
356                         host->max_sectors = 512;
357                         dev->max_fib_size = 2048;
358                         host->sg_tablesize = 65;
359                         dev->sg_tablesize = 81;
360                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
361                 } else if (acbsize == 4096) {
362                         host->max_sectors = 1024;
363                         dev->max_fib_size = 4096;
364                         host->sg_tablesize = 129;
365                         dev->sg_tablesize = 166;
366                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
367                 } else if (acbsize == 8192) {
368                         host->max_sectors = 2048;
369                         dev->max_fib_size = 8192;
370                         host->sg_tablesize = 257;
371                         dev->sg_tablesize = 337;
372                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
373                 } else if (acbsize > 0) {
374                         printk("Illegal acbsize=%d ignored\n", acbsize);
375                 }
376         }
377         {
378
379                 if (numacb > 0) {
380                         if (numacb < host->can_queue)
381                                 host->can_queue = numacb;
382                         else
383                                 printk("numacb=%d ignored\n", numacb);
384                 }
385         }
386
387         /*
388          *      Ok now init the communication subsystem
389          */
390
391         dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
392         if (dev->queues == NULL) {
393                 printk(KERN_ERR "Error could not allocate comm region.\n");
394                 return NULL;
395         }
396
397         if (aac_comm_init(dev)<0){
398                 kfree(dev->queues);
399                 return NULL;
400         }
401         /*
402          *      Initialize the list of fibs
403          */
404         if (aac_fib_setup(dev) < 0) {
405                 kfree(dev->queues);
406                 return NULL;
407         }
408                 
409         INIT_LIST_HEAD(&dev->fib_list);
410
411         return dev;
412 }
413
414