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