d598eba630d0b5dd7fb0fd8bce1092688b9c3105
[linux-2.6.git] / drivers / scsi / aacraid / comminit.c
1 /*
2  *      Adaptec AAC series RAID controller driver
3  *      (c) Copyright 2001 Red Hat Inc.
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         unsigned long aac_max_hostphysmempages;
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         /*
95          * number of 4k pages of host physical memory. The aacraid fw needs
96          * this number to be less than 4gb worth of pages. New firmware doesn't
97          * have any issues with the mapping system, but older Firmware did, and
98          * had *troubles* dealing with the math overloading past 32 bits, thus
99          * we must limit this field.
100          */
101         aac_max_hostphysmempages = dma_get_required_mask(&dev->pdev->dev) >> 12;
102         if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
103                 init->HostPhysMemPages = cpu_to_le32(aac_max_hostphysmempages);
104         else
105                 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
106
107         init->InitFlags = 0;
108         if (dev->comm_interface == AAC_COMM_MESSAGE) {
109                 init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
110                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
111         }
112         init->InitFlags |= cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
113                                        INITFLAGS_DRIVER_SUPPORTS_PM);
114         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
115         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
116         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
117
118         /*
119          * Increment the base address by the amount already used
120          */
121         base = base + fibsize + sizeof(struct aac_init);
122         phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
123         /*
124          *      Align the beginning of Headers to commalign
125          */
126         align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
127         base = base + align;
128         phys = phys + align;
129         /*
130          *      Fill in addresses of the Comm Area Headers and Queues
131          */
132         *commaddr = base;
133         init->CommHeaderAddress = cpu_to_le32((u32)phys);
134         /*
135          *      Increment the base address by the size of the CommArea
136          */
137         base = base + commsize;
138         phys = phys + commsize;
139         /*
140          *       Place the Printf buffer area after the Fast I/O comm area.
141          */
142         dev->printfbuf = (void *)base;
143         init->printfbuf = cpu_to_le32(phys);
144         init->printfbufsiz = cpu_to_le32(printfbufsiz);
145         memset(base, 0, printfbufsiz);
146         return 1;
147 }
148     
149 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
150 {
151         q->numpending = 0;
152         q->dev = dev;
153         init_waitqueue_head(&q->cmdready);
154         INIT_LIST_HEAD(&q->cmdq);
155         init_waitqueue_head(&q->qfull);
156         spin_lock_init(&q->lockdata);
157         q->lock = &q->lockdata;
158         q->headers.producer = (__le32 *)mem;
159         q->headers.consumer = (__le32 *)(mem+1);
160         *(q->headers.producer) = cpu_to_le32(qsize);
161         *(q->headers.consumer) = cpu_to_le32(qsize);
162         q->entries = qsize;
163 }
164
165 /**
166  *      aac_send_shutdown               -       shutdown an adapter
167  *      @dev: Adapter to shutdown
168  *
169  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
170  */
171
172 int aac_send_shutdown(struct aac_dev * dev)
173 {
174         struct fib * fibctx;
175         struct aac_close *cmd;
176         int status;
177
178         fibctx = aac_fib_alloc(dev);
179         if (!fibctx)
180                 return -ENOMEM;
181         aac_fib_init(fibctx);
182
183         cmd = (struct aac_close *) fib_data(fibctx);
184
185         cmd->command = cpu_to_le32(VM_CloseAll);
186         cmd->cid = cpu_to_le32(0xffffffff);
187
188         status = aac_fib_send(ContainerCommand,
189                           fibctx,
190                           sizeof(struct aac_close),
191                           FsaNormal,
192                           -2 /* Timeout silently */, 1,
193                           NULL, NULL);
194
195         if (status >= 0)
196                 aac_fib_complete(fibctx);
197         aac_fib_free(fibctx);
198         return status;
199 }
200
201 /**
202  *      aac_comm_init   -       Initialise FSA data structures
203  *      @dev:   Adapter to initialise
204  *
205  *      Initializes the data structures that are required for the FSA commuication
206  *      interface to operate. 
207  *      Returns
208  *              1 - if we were able to init the commuication interface.
209  *              0 - If there were errors initing. This is a fatal error.
210  */
211  
212 static int aac_comm_init(struct aac_dev * dev)
213 {
214         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
215         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
216         u32 *headers;
217         struct aac_entry * queues;
218         unsigned long size;
219         struct aac_queue_block * comm = dev->queues;
220         /*
221          *      Now allocate and initialize the zone structures used as our 
222          *      pool of FIB context records.  The size of the zone is based
223          *      on the system memory size.  We also initialize the mutex used
224          *      to protect the zone.
225          */
226         spin_lock_init(&dev->fib_lock);
227
228         /*
229          *      Allocate the physically contigous space for the commuication
230          *      queue headers. 
231          */
232
233         size = hdrsize + queuesize;
234
235         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
236                 return -ENOMEM;
237
238         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
239
240         /* Adapter to Host normal priority Command queue */ 
241         comm->queue[HostNormCmdQueue].base = queues;
242         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
243         queues += HOST_NORM_CMD_ENTRIES;
244         headers += 2;
245
246         /* Adapter to Host high priority command queue */
247         comm->queue[HostHighCmdQueue].base = queues;
248         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
249     
250         queues += HOST_HIGH_CMD_ENTRIES;
251         headers +=2;
252
253         /* Host to adapter normal priority command queue */
254         comm->queue[AdapNormCmdQueue].base = queues;
255         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
256     
257         queues += ADAP_NORM_CMD_ENTRIES;
258         headers += 2;
259
260         /* host to adapter high priority command queue */
261         comm->queue[AdapHighCmdQueue].base = queues;
262         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
263     
264         queues += ADAP_HIGH_CMD_ENTRIES;
265         headers += 2;
266
267         /* adapter to host normal priority response queue */
268         comm->queue[HostNormRespQueue].base = queues;
269         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
270         queues += HOST_NORM_RESP_ENTRIES;
271         headers += 2;
272
273         /* adapter to host high priority response queue */
274         comm->queue[HostHighRespQueue].base = queues;
275         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
276    
277         queues += HOST_HIGH_RESP_ENTRIES;
278         headers += 2;
279
280         /* host to adapter normal priority response queue */
281         comm->queue[AdapNormRespQueue].base = queues;
282         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
283
284         queues += ADAP_NORM_RESP_ENTRIES;
285         headers += 2;
286         
287         /* host to adapter high priority response queue */ 
288         comm->queue[AdapHighRespQueue].base = queues;
289         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
290
291         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
292         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
293         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
294         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
295
296         return 0;
297 }
298
299 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
300 {
301         u32 status[5];
302         struct Scsi_Host * host = dev->scsi_host_ptr;
303
304         /*
305          *      Check the preferred comm settings, defaults from template.
306          */
307         dev->max_fib_size = sizeof(struct hw_fib);
308         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
309                 - sizeof(struct aac_fibhdr)
310                 - sizeof(struct aac_write) + sizeof(struct sgentry))
311                         / sizeof(struct sgentry);
312         dev->comm_interface = AAC_COMM_PRODUCER;
313         dev->raw_io_64 = 0;
314         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
315                 0, 0, 0, 0, 0, 0, status+0, status+1, status+2, NULL, NULL)) &&
316                         (status[0] == 0x00000001)) {
317                 if (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_64))
318                         dev->raw_io_64 = 1;
319                 if (dev->a_ops.adapter_comm &&
320                     (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM)))
321                         dev->comm_interface = AAC_COMM_MESSAGE;
322                 if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
323                     (status[2] > dev->base_size)) {
324                         aac_adapter_ioremap(dev, 0);
325                         dev->base_size = status[2];
326                         if (aac_adapter_ioremap(dev, status[2])) {
327                                 /* remap failed, go back ... */
328                                 dev->comm_interface = AAC_COMM_PRODUCER;
329                                 if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
330                                         printk(KERN_WARNING
331                                           "aacraid: unable to map adapter.\n");
332                                         return NULL;
333                                 }
334                         }
335                 }
336         }
337         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
338           0, 0, 0, 0, 0, 0,
339           status+0, status+1, status+2, status+3, status+4))
340          && (status[0] == 0x00000001)) {
341                 /*
342                  *      status[1] >> 16         maximum command size in KB
343                  *      status[1] & 0xFFFF      maximum FIB size
344                  *      status[2] >> 16         maximum SG elements to driver
345                  *      status[2] & 0xFFFF      maximum SG elements from driver
346                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
347                  */
348                 host->max_sectors = (status[1] >> 16) << 1;
349                 dev->max_fib_size = status[1] & 0xFFFF;
350                 host->sg_tablesize = status[2] >> 16;
351                 dev->sg_tablesize = status[2] & 0xFFFF;
352                 host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
353                 /*
354                  *      NOTE:
355                  *      All these overrides are based on a fixed internal
356                  *      knowledge and understanding of existing adapters,
357                  *      acbsize should be set with caution.
358                  */
359                 if (acbsize == 512) {
360                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
361                         dev->max_fib_size = 512;
362                         dev->sg_tablesize = host->sg_tablesize
363                           = (512 - sizeof(struct aac_fibhdr)
364                             - sizeof(struct aac_write) + sizeof(struct sgentry))
365                              / sizeof(struct sgentry);
366                         host->can_queue = AAC_NUM_IO_FIB;
367                 } else if (acbsize == 2048) {
368                         host->max_sectors = 512;
369                         dev->max_fib_size = 2048;
370                         host->sg_tablesize = 65;
371                         dev->sg_tablesize = 81;
372                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
373                 } else if (acbsize == 4096) {
374                         host->max_sectors = 1024;
375                         dev->max_fib_size = 4096;
376                         host->sg_tablesize = 129;
377                         dev->sg_tablesize = 166;
378                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
379                 } else if (acbsize == 8192) {
380                         host->max_sectors = 2048;
381                         dev->max_fib_size = 8192;
382                         host->sg_tablesize = 257;
383                         dev->sg_tablesize = 337;
384                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
385                 } else if (acbsize > 0) {
386                         printk("Illegal acbsize=%d ignored\n", acbsize);
387                 }
388         }
389         {
390
391                 if (numacb > 0) {
392                         if (numacb < host->can_queue)
393                                 host->can_queue = numacb;
394                         else
395                                 printk("numacb=%d ignored\n", numacb);
396                 }
397         }
398
399         /*
400          *      Ok now init the communication subsystem
401          */
402
403         dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
404         if (dev->queues == NULL) {
405                 printk(KERN_ERR "Error could not allocate comm region.\n");
406                 return NULL;
407         }
408
409         if (aac_comm_init(dev)<0){
410                 kfree(dev->queues);
411                 return NULL;
412         }
413         /*
414          *      Initialize the list of fibs
415          */
416         if (aac_fib_setup(dev) < 0) {
417                 kfree(dev->queues);
418                 return NULL;
419         }
420                 
421         INIT_LIST_HEAD(&dev->fib_list);
422
423         return dev;
424 }
425
426