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 surprised if its problematic.
 107          * [AK: something is very very wrong when a driver tests this symbol.
 108          *  Someone should figure out what the comment writer really meant here and fix
 109          *  the code. Or just remove that bad code. ]
 110          */
 111 #ifndef CONFIG_IOMMU
 112         if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
 113                 init->HostPhysMemPages =
 114                         cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
 115         } else
 116 #endif
 117         {
 118                 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
 119         }
 120
 121         init->InitFlags = 0;
 122         if (dev->new_comm_interface) {
 123                 init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
 124                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
 125         }
 126         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 127         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 128         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
 129
 130         /*
 131          * Increment the base address by the amount already used
 132          */
 133         base = base + fibsize + sizeof(struct aac_init);
 134         phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
 135         /*
 136          *      Align the beginning of Headers to commalign
 137          */
 138         align = (commalign - ((unsigned long)(base) & (commalign - 1)));
 139         base = base + align;
 140         phys = phys + align;
 141         /*
 142          *      Fill in addresses of the Comm Area Headers and Queues
 143          */
 144         *commaddr = base;
 145         init->CommHeaderAddress = cpu_to_le32((u32)phys);
 146         /*
 147          *      Increment the base address by the size of the CommArea
 148          */
 149         base = base + commsize;
 150         phys = phys + commsize;
 151         /*
 152          *       Place the Printf buffer area after the Fast I/O comm area.
 153          */
 154         dev->printfbuf = (void *)base;
 155         init->printfbuf = cpu_to_le32(phys);
 156         init->printfbufsiz = cpu_to_le32(printfbufsiz);
 157         memset(base, 0, printfbufsiz);
 158         return 1;
 159 }
 160
 161 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
 162 {
 163         q->numpending = 0;
 164         q->dev = dev;
 165         init_waitqueue_head(&q->cmdready);
 166         INIT_LIST_HEAD(&q->cmdq);
 167         init_waitqueue_head(&q->qfull);
 168         spin_lock_init(&q->lockdata);
 169         q->lock = &q->lockdata;
 170         q->headers.producer = (__le32 *)mem;
 171         q->headers.consumer = (__le32 *)(mem+1);
 172         *(q->headers.producer) = cpu_to_le32(qsize);
 173         *(q->headers.consumer) = cpu_to_le32(qsize);
 174         q->entries = qsize;
 175 }
 176
 177 /**
 178  *      aac_send_shutdown               -       shutdown an adapter
 179  *      @dev: Adapter to shutdown
 180  *
 181  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
 182  */
 183
 184 int aac_send_shutdown(struct aac_dev * dev)
 185 {
 186         struct fib * fibctx;
 187         struct aac_close *cmd;
 188         int status;
 189
 190         fibctx = aac_fib_alloc(dev);
 191         if (!fibctx)
 192                 return -ENOMEM;
 193         aac_fib_init(fibctx);
 194
 195         cmd = (struct aac_close *) fib_data(fibctx);
 196
 197         cmd->command = cpu_to_le32(VM_CloseAll);
 198         cmd->cid = cpu_to_le32(0xffffffff);
 199
 200         status = aac_fib_send(ContainerCommand,
 201                           fibctx,
 202                           sizeof(struct aac_close),
 203                           FsaNormal,
 204                           -2 /* Timeout silently */, 1,
 205                           NULL, NULL);
 206
 207         if (status == 0)
 208                 aac_fib_complete(fibctx);
 209         aac_fib_free(fibctx);
 210         return status;
 211 }
 212
 213 /**
 214  *      aac_comm_init   -       Initialise FSA data structures
 215  *      @dev:   Adapter to initialise
 216  *
 217  *      Initializes the data structures that are required for the FSA commuication
 218  *      interface to operate.
 219  *      Returns
 220  *              1 - if we were able to init the commuication interface.
 221  *              0 - If there were errors initing. This is a fatal error.
 222  */
 223
 224 static int aac_comm_init(struct aac_dev * dev)
 225 {
 226         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
 227         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
 228         u32 *headers;
 229         struct aac_entry * queues;
 230         unsigned long size;
 231         struct aac_queue_block * comm = dev->queues;
 232         /*
 233          *      Now allocate and initialize the zone structures used as our
 234          *      pool of FIB context records.  The size of the zone is based
 235          *      on the system memory size.  We also initialize the mutex used
 236          *      to protect the zone.
 237          */
 238         spin_lock_init(&dev->fib_lock);
 239
 240         /*
 241          *      Allocate the physically contigous space for the commuication
 242          *      queue headers.
 243          */
 244
 245         size = hdrsize + queuesize;
 246
 247         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
 248                 return -ENOMEM;
 249
 250         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
 251
 252         /* Adapter to Host normal priority Command queue */
 253         comm->queue[HostNormCmdQueue].base = queues;
 254         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
 255         queues += HOST_NORM_CMD_ENTRIES;
 256         headers += 2;
 257
 258         /* Adapter to Host high priority command queue */
 259         comm->queue[HostHighCmdQueue].base = queues;
 260         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
 261
 262         queues += HOST_HIGH_CMD_ENTRIES;
 263         headers +=2;
 264
 265         /* Host to adapter normal priority command queue */
 266         comm->queue[AdapNormCmdQueue].base = queues;
 267         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
 268
 269         queues += ADAP_NORM_CMD_ENTRIES;
 270         headers += 2;
 271
 272         /* host to adapter high priority command queue */
 273         comm->queue[AdapHighCmdQueue].base = queues;
 274         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
 275
 276         queues += ADAP_HIGH_CMD_ENTRIES;
 277         headers += 2;
 278
 279         /* adapter to host normal priority response queue */
 280         comm->queue[HostNormRespQueue].base = queues;
 281         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
 282         queues += HOST_NORM_RESP_ENTRIES;
 283         headers += 2;
 284
 285         /* adapter to host high priority response queue */
 286         comm->queue[HostHighRespQueue].base = queues;
 287         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
 288
 289         queues += HOST_HIGH_RESP_ENTRIES;
 290         headers += 2;
 291
 292         /* host to adapter normal priority response queue */
 293         comm->queue[AdapNormRespQueue].base = queues;
 294         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
 295
 296         queues += ADAP_NORM_RESP_ENTRIES;
 297         headers += 2;
 298
 299         /* host to adapter high priority response queue */
 300         comm->queue[AdapHighRespQueue].base = queues;
 301         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
 302
 303         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
 304         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
 305         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
 306         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
 307
 308         return 0;
 309 }
 310
 311 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 312 {
 313         u32 status[5];
 314         struct Scsi_Host * host = dev->scsi_host_ptr;
 315
 316         /*
 317          *      Check the preferred comm settings, defaults from template.
 318          */
 319         dev->max_fib_size = sizeof(struct hw_fib);
 320         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
 321                 - sizeof(struct aac_fibhdr)
 322                 - sizeof(struct aac_write) + sizeof(struct sgentry))
 323                         / sizeof(struct sgentry);
 324         dev->new_comm_interface = 0;
 325         dev->raw_io_64 = 0;
 326         if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
 327                 0, 0, 0, 0, 0, 0, status+0, status+1, status+2, NULL, NULL)) &&
 328                         (status[0] == 0x00000001)) {
 329                 if (status[1] & AAC_OPT_NEW_COMM_64)
 330                         dev->raw_io_64 = 1;
 331                 if (status[1] & AAC_OPT_NEW_COMM)
 332                         dev->new_comm_interface = dev->a_ops.adapter_send != 0;
 333                 if (dev->new_comm_interface && (status[2] > dev->base_size)) {
 334                         iounmap(dev->regs.sa);
 335                         dev->base_size = status[2];
 336                         dprintk((KERN_DEBUG "ioremap(%lx,%d)\n",
 337                           host->base, status[2]));
 338                         dev->regs.sa = ioremap(host->base, status[2]);
 339                         if (dev->regs.sa == NULL) {
 340                                 /* remap failed, go back ... */
 341                                 dev->new_comm_interface = 0;
 342                                 dev->regs.sa = ioremap(host->base,
 343                                                 AAC_MIN_FOOTPRINT_SIZE);
 344                                 if (dev->regs.sa == NULL) {
 345                                         printk(KERN_WARNING
 346                                           "aacraid: unable to map adapter.\n");
 347                                         return NULL;
 348                                 }
 349                         }
 350                 }
 351         }
 352         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 353           0, 0, 0, 0, 0, 0,
 354           status+0, status+1, status+2, status+3, status+4))
 355          && (status[0] == 0x00000001)) {
 356                 /*
 357                  *      status[1] >> 16         maximum command size in KB
 358                  *      status[1] & 0xFFFF      maximum FIB size
 359                  *      status[2] >> 16         maximum SG elements to driver
 360                  *      status[2] & 0xFFFF      maximum SG elements from driver
 361                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
 362                  */
 363                 host->max_sectors = (status[1] >> 16) << 1;
 364                 dev->max_fib_size = status[1] & 0xFFFF;
 365                 host->sg_tablesize = status[2] >> 16;
 366                 dev->sg_tablesize = status[2] & 0xFFFF;
 367                 host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
 368                 /*
 369                  *      NOTE:
 370                  *      All these overrides are based on a fixed internal
 371                  *      knowledge and understanding of existing adapters,
 372                  *      acbsize should be set with caution.
 373                  */
 374                 if (acbsize == 512) {
 375                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
 376                         dev->max_fib_size = 512;
 377                         dev->sg_tablesize = host->sg_tablesize
 378                           = (512 - sizeof(struct aac_fibhdr)
 379                             - sizeof(struct aac_write) + sizeof(struct sgentry))
 380                              / sizeof(struct sgentry);
 381                         host->can_queue = AAC_NUM_IO_FIB;
 382                 } else if (acbsize == 2048) {
 383                         host->max_sectors = 512;
 384                         dev->max_fib_size = 2048;
 385                         host->sg_tablesize = 65;
 386                         dev->sg_tablesize = 81;
 387                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
 388                 } else if (acbsize == 4096) {
 389                         host->max_sectors = 1024;
 390                         dev->max_fib_size = 4096;
 391                         host->sg_tablesize = 129;
 392                         dev->sg_tablesize = 166;
 393                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
 394                 } else if (acbsize == 8192) {
 395                         host->max_sectors = 2048;
 396                         dev->max_fib_size = 8192;
 397                         host->sg_tablesize = 257;
 398                         dev->sg_tablesize = 337;
 399                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
 400                 } else if (acbsize > 0) {
 401                         printk("Illegal acbsize=%d ignored\n", acbsize);
 402                 }
 403         }
 404         {
 405
 406                 if (numacb > 0) {
 407                         if (numacb < host->can_queue)
 408                                 host->can_queue = numacb;
 409                         else
 410                                 printk("numacb=%d ignored\n", numacb);
 411                 }
 412         }
 413
 414         /*
 415          *      Ok now init the communication subsystem
 416          */
 417
 418         dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 419         if (dev->queues == NULL) {
 420                 printk(KERN_ERR "Error could not allocate comm region.\n");
 421                 return NULL;
 422         }
 423         memset(dev->queues, 0, sizeof(struct aac_queue_block));
 424
 425         if (aac_comm_init(dev)<0){
 426                 kfree(dev->queues);
 427                 return NULL;
 428         }
 429         /*
 430          *      Initialize the list of fibs
 431          */
 432         if (aac_fib_setup(dev) < 0) {
 433                 kfree(dev->queues);
 434                 return NULL;
 435         }
 436
 437         INIT_LIST_HEAD(&dev->fib_list);
 438
 439         return dev;
 440 }
 441
 442