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