Merge branch 'master'
[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 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/sched.h>
36 #include <linux/pci.h>
37 #include <linux/spinlock.h>
38 #include <linux/slab.h>
39 #include <linux/blkdev.h>
40 #include <linux/completion.h>
41 #include <linux/mm.h>
42 #include <scsi/scsi_host.h>
43 #include <asm/semaphore.h>
44
45 #include "aacraid.h"
46
47 struct aac_common aac_config = {
48         .irq_mod = 1
49 };
50
51 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
52 {
53         unsigned char *base;
54         unsigned long size, align;
55         const unsigned long fibsize = 4096;
56         const unsigned long printfbufsiz = 256;
57         struct aac_init *init;
58         dma_addr_t phys;
59
60         size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
61
62  
63         base = pci_alloc_consistent(dev->pdev, size, &phys);
64
65         if(base == NULL)
66         {
67                 printk(KERN_ERR "aacraid: unable to create mapping.\n");
68                 return 0;
69         }
70         dev->comm_addr = (void *)base;
71         dev->comm_phys = phys;
72         dev->comm_size = size;
73         
74         dev->init = (struct aac_init *)(base + fibsize);
75         dev->init_pa = phys + fibsize;
76
77         init = dev->init;
78
79         init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
80         if (dev->max_fib_size != sizeof(struct hw_fib))
81                 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
82         init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
83         init->fsrev = cpu_to_le32(dev->fsrev);
84
85         /*
86          *      Adapter Fibs are the first thing allocated so that they
87          *      start page aligned
88          */
89         dev->aif_base_va = (struct hw_fib *)base;
90         
91         init->AdapterFibsVirtualAddress = 0;
92         init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
93         init->AdapterFibsSize = cpu_to_le32(fibsize);
94         init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
95         /* 
96          * number of 4k pages of host physical memory. The aacraid fw needs
97          * this number to be less than 4gb worth of pages. num_physpages is in
98          * system page units. New firmware doesn't have any issues with the
99          * mapping system, but older Firmware did, and had *troubles* dealing
100          * with the math overloading past 32 bits, thus we must limit this
101          * field.
102          *
103          * This assumes the memory is mapped zero->n, which isnt
104          * always true on real computers. It also has some slight problems
105          * with the GART on x86-64. I've btw never tried DMA from PCI space
106          * on this platform but don't be suprised if its problematic.
107          */
108 #ifndef CONFIG_GART_IOMMU
109         if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
110                 init->HostPhysMemPages = 
111                         cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
112         } else 
113 #endif  
114         {
115                 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
116         }
117
118         init->InitFlags = 0;
119         if (dev->new_comm_interface) {
120                 init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
121                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
122         }
123         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
124         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
125         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
126
127         /*
128          * Increment the base address by the amount already used
129          */
130         base = base + fibsize + sizeof(struct aac_init);
131         phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
132         /*
133          *      Align the beginning of Headers to commalign
134          */
135         align = (commalign - ((unsigned long)(base) & (commalign - 1)));
136         base = base + align;
137         phys = phys + align;
138         /*
139          *      Fill in addresses of the Comm Area Headers and Queues
140          */
141         *commaddr = base;
142         init->CommHeaderAddress = cpu_to_le32((u32)phys);
143         /*
144          *      Increment the base address by the size of the CommArea
145          */
146         base = base + commsize;
147         phys = phys + commsize;
148         /*
149          *       Place the Printf buffer area after the Fast I/O comm area.
150          */
151         dev->printfbuf = (void *)base;
152         init->printfbuf = cpu_to_le32(phys);
153         init->printfbufsiz = cpu_to_le32(printfbufsiz);
154         memset(base, 0, printfbufsiz);
155         return 1;
156 }
157     
158 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
159 {
160         q->numpending = 0;
161         q->dev = dev;
162         INIT_LIST_HEAD(&q->pendingq);
163         init_waitqueue_head(&q->cmdready);
164         INIT_LIST_HEAD(&q->cmdq);
165         init_waitqueue_head(&q->qfull);
166         spin_lock_init(&q->lockdata);
167         q->lock = &q->lockdata;
168         q->headers.producer = (__le32 *)mem;
169         q->headers.consumer = (__le32 *)(mem+1);
170         *(q->headers.producer) = cpu_to_le32(qsize);
171         *(q->headers.consumer) = cpu_to_le32(qsize);
172         q->entries = qsize;
173 }
174
175 /**
176  *      aac_send_shutdown               -       shutdown an adapter
177  *      @dev: Adapter to shutdown
178  *
179  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
180  */
181
182 int aac_send_shutdown(struct aac_dev * dev)
183 {
184         struct fib * fibctx;
185         struct aac_close *cmd;
186         int status;
187
188         fibctx = fib_alloc(dev);
189         if (!fibctx)
190                 return -ENOMEM;
191         fib_init(fibctx);
192
193         cmd = (struct aac_close *) fib_data(fibctx);
194
195         cmd->command = cpu_to_le32(VM_CloseAll);
196         cmd->cid = cpu_to_le32(0xffffffff);
197
198         status = fib_send(ContainerCommand,
199                           fibctx,
200                           sizeof(struct aac_close),
201                           FsaNormal,
202                           -2 /* Timeout silently */, 1,
203                           NULL, NULL);
204
205         if (status == 0)
206                 fib_complete(fibctx);
207         fib_free(fibctx);
208         return status;
209 }
210
211 /**
212  *      aac_comm_init   -       Initialise FSA data structures
213  *      @dev:   Adapter to initialise
214  *
215  *      Initializes the data structures that are required for the FSA commuication
216  *      interface to operate. 
217  *      Returns
218  *              1 - if we were able to init the commuication interface.
219  *              0 - If there were errors initing. This is a fatal error.
220  */
221  
222 static int aac_comm_init(struct aac_dev * dev)
223 {
224         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
225         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
226         u32 *headers;
227         struct aac_entry * queues;
228         unsigned long size;
229         struct aac_queue_block * comm = dev->queues;
230         /*
231          *      Now allocate and initialize the zone structures used as our 
232          *      pool of FIB context records.  The size of the zone is based
233          *      on the system memory size.  We also initialize the mutex used
234          *      to protect the zone.
235          */
236         spin_lock_init(&dev->fib_lock);
237
238         /*
239          *      Allocate the physically contigous space for the commuication
240          *      queue headers. 
241          */
242
243         size = hdrsize + queuesize;
244
245         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
246                 return -ENOMEM;
247
248         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
249
250         /* Adapter to Host normal priority Command queue */ 
251         comm->queue[HostNormCmdQueue].base = queues;
252         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
253         queues += HOST_NORM_CMD_ENTRIES;
254         headers += 2;
255
256         /* Adapter to Host high priority command queue */
257         comm->queue[HostHighCmdQueue].base = queues;
258         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
259     
260         queues += HOST_HIGH_CMD_ENTRIES;
261         headers +=2;
262
263         /* Host to adapter normal priority command queue */
264         comm->queue[AdapNormCmdQueue].base = queues;
265         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
266     
267         queues += ADAP_NORM_CMD_ENTRIES;
268         headers += 2;
269
270         /* host to adapter high priority command queue */
271         comm->queue[AdapHighCmdQueue].base = queues;
272         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
273     
274         queues += ADAP_HIGH_CMD_ENTRIES;
275         headers += 2;
276
277         /* adapter to host normal priority response queue */
278         comm->queue[HostNormRespQueue].base = queues;
279         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
280         queues += HOST_NORM_RESP_ENTRIES;
281         headers += 2;
282
283         /* adapter to host high priority response queue */
284         comm->queue[HostHighRespQueue].base = queues;
285         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
286    
287         queues += HOST_HIGH_RESP_ENTRIES;
288         headers += 2;
289
290         /* host to adapter normal priority response queue */
291         comm->queue[AdapNormRespQueue].base = queues;
292         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
293
294         queues += ADAP_NORM_RESP_ENTRIES;
295         headers += 2;
296         
297         /* host to adapter high priority response queue */ 
298         comm->queue[AdapHighRespQueue].base = queues;
299         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
300
301         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
302         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
303         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
304         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
305
306         return 0;
307 }
308
309 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
310 {
311         u32 status[5];
312         struct Scsi_Host * host = dev->scsi_host_ptr;
313
314         /*
315          *      Check the preferred comm settings, defaults from template.
316          */
317         dev->max_fib_size = sizeof(struct hw_fib);
318         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
319                 - sizeof(struct aac_fibhdr)
320                 - sizeof(struct aac_write) + sizeof(struct sgentry))
321                         / sizeof(struct sgentry);
322         dev->new_comm_interface = 0;
323         dev->raw_io_64 = 0;
324         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
325                 0, 0, 0, 0, 0, 0, status+0, status+1, status+2, NULL, NULL)) &&
326                         (status[0] == 0x00000001)) {
327                 if (status[1] & AAC_OPT_NEW_COMM_64)
328                         dev->raw_io_64 = 1;
329                 if (status[1] & AAC_OPT_NEW_COMM)
330                         dev->new_comm_interface = dev->a_ops.adapter_send != 0;
331                 if (dev->new_comm_interface && (status[2] > dev->base_size)) {
332                         iounmap(dev->regs.sa);
333                         dev->base_size = status[2];
334                         dprintk((KERN_DEBUG "ioremap(%lx,%d)\n",
335                           host->base, status[2]));
336                         dev->regs.sa = ioremap(host->base, status[2]);
337                         if (dev->regs.sa == NULL) {
338                                 /* remap failed, go back ... */
339                                 dev->new_comm_interface = 0;
340                                 dev->regs.sa = ioremap(host->base, 
341                                                 AAC_MIN_FOOTPRINT_SIZE);
342                                 if (dev->regs.sa == NULL) {     
343                                         printk(KERN_WARNING
344                                           "aacraid: unable to map adapter.\n");
345                                         return NULL;
346                                 }
347                         }
348                 }
349         }
350         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
351           0, 0, 0, 0, 0, 0,
352           status+0, status+1, status+2, status+3, status+4))
353          && (status[0] == 0x00000001)) {
354                 /*
355                  *      status[1] >> 16         maximum command size in KB
356                  *      status[1] & 0xFFFF      maximum FIB size
357                  *      status[2] >> 16         maximum SG elements to driver
358                  *      status[2] & 0xFFFF      maximum SG elements from driver
359                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
360                  */
361                 host->max_sectors = (status[1] >> 16) << 1;
362                 dev->max_fib_size = status[1] & 0xFFFF;
363                 host->sg_tablesize = status[2] >> 16;
364                 dev->sg_tablesize = status[2] & 0xFFFF;
365                 host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
366                 /*
367                  *      NOTE:
368                  *      All these overrides are based on a fixed internal
369                  *      knowledge and understanding of existing adapters,
370                  *      acbsize should be set with caution.
371                  */
372                 if (acbsize == 512) {
373                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
374                         dev->max_fib_size = 512;
375                         dev->sg_tablesize = host->sg_tablesize
376                           = (512 - sizeof(struct aac_fibhdr)
377                             - sizeof(struct aac_write) + sizeof(struct sgentry))
378                              / sizeof(struct sgentry);
379                         host->can_queue = AAC_NUM_IO_FIB;
380                 } else if (acbsize == 2048) {
381                         host->max_sectors = 512;
382                         dev->max_fib_size = 2048;
383                         host->sg_tablesize = 65;
384                         dev->sg_tablesize = 81;
385                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
386                 } else if (acbsize == 4096) {
387                         host->max_sectors = 1024;
388                         dev->max_fib_size = 4096;
389                         host->sg_tablesize = 129;
390                         dev->sg_tablesize = 166;
391                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
392                 } else if (acbsize == 8192) {
393                         host->max_sectors = 2048;
394                         dev->max_fib_size = 8192;
395                         host->sg_tablesize = 257;
396                         dev->sg_tablesize = 337;
397                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
398                 } else if (acbsize > 0) {
399                         printk("Illegal acbsize=%d ignored\n", acbsize);
400                 }
401         }
402         {
403
404                 if (numacb > 0) {
405                         if (numacb < host->can_queue)
406                                 host->can_queue = numacb;
407                         else
408                                 printk("numacb=%d ignored\n", numacb);
409                 }
410         }
411
412         /*
413          *      Ok now init the communication subsystem
414          */
415
416         dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
417         if (dev->queues == NULL) {
418                 printk(KERN_ERR "Error could not allocate comm region.\n");
419                 return NULL;
420         }
421         memset(dev->queues, 0, sizeof(struct aac_queue_block));
422
423         if (aac_comm_init(dev)<0){
424                 kfree(dev->queues);
425                 return NULL;
426         }
427         /*
428          *      Initialize the list of fibs
429          */
430         if(fib_setup(dev)<0){
431                 kfree(dev->queues);
432                 return NULL;
433         }
434                 
435         INIT_LIST_HEAD(&dev->fib_list);
436         init_completion(&dev->aif_completion);
437
438         return dev;
439 }
440
441