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 = aac_fib_alloc(dev);
 189         if (!fibctx)
 190                 return -ENOMEM;
 191         aac_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 = aac_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                 aac_fib_complete(fibctx);
 207         aac_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 (aac_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