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         init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
  96
  97         init->InitFlags = 0;
  98         if (dev->new_comm_interface) {
  99                 init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
 100                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
 101         }
 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 - ((unsigned long)(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->new_comm_interface = 0;
 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] & AAC_OPT_NEW_COMM_64)
 306                         dev->raw_io_64 = 1;
 307                 if (status[1] & AAC_OPT_NEW_COMM)
 308                         dev->new_comm_interface = dev->a_ops.adapter_send != 0;
 309                 if (dev->new_comm_interface && (status[2] > dev->base_size)) {
 310                         aac_adapter_ioremap(dev, 0);
 311                         dev->base_size = status[2];
 312                         if (aac_adapter_ioremap(dev, status[2])) {
 313                                 /* remap failed, go back ... */
 314                                 dev->new_comm_interface = 0;
 315                                 if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
 316                                         printk(KERN_WARNING
 317                                           "aacraid: unable to map adapter.\n");
 318                                         return NULL;
 319                                 }
 320                         }
 321                 }
 322         }
 323         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 324           0, 0, 0, 0, 0, 0,
 325           status+0, status+1, status+2, status+3, status+4))
 326          && (status[0] == 0x00000001)) {
 327                 /*
 328                  *      status[1] >> 16         maximum command size in KB
 329                  *      status[1] & 0xFFFF      maximum FIB size
 330                  *      status[2] >> 16         maximum SG elements to driver
 331                  *      status[2] & 0xFFFF      maximum SG elements from driver
 332                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
 333                  */
 334                 host->max_sectors = (status[1] >> 16) << 1;
 335                 dev->max_fib_size = status[1] & 0xFFFF;
 336                 host->sg_tablesize = status[2] >> 16;
 337                 dev->sg_tablesize = status[2] & 0xFFFF;
 338                 host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
 339                 /*
 340                  *      NOTE:
 341                  *      All these overrides are based on a fixed internal
 342                  *      knowledge and understanding of existing adapters,
 343                  *      acbsize should be set with caution.
 344                  */
 345                 if (acbsize == 512) {
 346                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
 347                         dev->max_fib_size = 512;
 348                         dev->sg_tablesize = host->sg_tablesize
 349                           = (512 - sizeof(struct aac_fibhdr)
 350                             - sizeof(struct aac_write) + sizeof(struct sgentry))
 351                              / sizeof(struct sgentry);
 352                         host->can_queue = AAC_NUM_IO_FIB;
 353                 } else if (acbsize == 2048) {
 354                         host->max_sectors = 512;
 355                         dev->max_fib_size = 2048;
 356                         host->sg_tablesize = 65;
 357                         dev->sg_tablesize = 81;
 358                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
 359                 } else if (acbsize == 4096) {
 360                         host->max_sectors = 1024;
 361                         dev->max_fib_size = 4096;
 362                         host->sg_tablesize = 129;
 363                         dev->sg_tablesize = 166;
 364                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
 365                 } else if (acbsize == 8192) {
 366                         host->max_sectors = 2048;
 367                         dev->max_fib_size = 8192;
 368                         host->sg_tablesize = 257;
 369                         dev->sg_tablesize = 337;
 370                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
 371                 } else if (acbsize > 0) {
 372                         printk("Illegal acbsize=%d ignored\n", acbsize);
 373                 }
 374         }
 375         {
 376
 377                 if (numacb > 0) {
 378                         if (numacb < host->can_queue)
 379                                 host->can_queue = numacb;
 380                         else
 381                                 printk("numacb=%d ignored\n", numacb);
 382                 }
 383         }
 384
 385         /*
 386          *      Ok now init the communication subsystem
 387          */
 388
 389         dev->queues = kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 390         if (dev->queues == NULL) {
 391                 printk(KERN_ERR "Error could not allocate comm region.\n");
 392                 return NULL;
 393         }
 394         memset(dev->queues, 0, sizeof(struct aac_queue_block));
 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