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