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
  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
  58         size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
  59
  60
  61         base = pci_alloc_consistent(dev->pdev, size, &phys);
  62
  63         if(base == NULL)
  64         {
  65                 printk(KERN_ERR "aacraid: unable to create mapping.\n");
  66                 return 0;
  67         }
  68         dev->comm_addr = (void *)base;
  69         dev->comm_phys = phys;
  70         dev->comm_size = size;
  71
  72         dev->init = (struct aac_init *)(base + fibsize);
  73         dev->init_pa = phys + fibsize;
  74
  75         init = dev->init;
  76
  77         init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
  78         if (dev->max_fib_size != sizeof(struct hw_fib))
  79                 init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
  80         init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
  81         init->fsrev = cpu_to_le32(dev->fsrev);
  82
  83         /*
  84          *      Adapter Fibs are the first thing allocated so that they
  85          *      start page aligned
  86          */
  87         dev->aif_base_va = (struct hw_fib *)base;
  88
  89         init->AdapterFibsVirtualAddress = 0;
  90         init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
  91         init->AdapterFibsSize = cpu_to_le32(fibsize);
  92         init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
  93         /*
  94          * number of 4k pages of host physical memory. The aacraid fw needs
  95          * this number to be less than 4gb worth of pages. num_physpages is in
  96          * system page units. New firmware doesn't have any issues with the
  97          * mapping system, but older Firmware did, and had *troubles* dealing
  98          * with the math overloading past 32 bits, thus we must limit this
  99          * field.
 100          *
 101          * This assumes the memory is mapped zero->n, which isnt
 102          * always true on real computers. It also has some slight problems
 103          * with the GART on x86-64. I've btw never tried DMA from PCI space
 104          * on this platform but don't be suprised if its problematic.
 105          */
 106 #ifndef CONFIG_GART_IOMMU
 107         if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
 108                 init->HostPhysMemPages =
 109                         cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
 110         } else
 111 #endif
 112         {
 113                 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
 114         }
 115
 116         init->InitFlags = 0;
 117         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
 118         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 119         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
 120
 121         /*
 122          * Increment the base address by the amount already used
 123          */
 124         base = base + fibsize + sizeof(struct aac_init);
 125         phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
 126         /*
 127          *      Align the beginning of Headers to commalign
 128          */
 129         align = (commalign - ((unsigned long)(base) & (commalign - 1)));
 130         base = base + align;
 131         phys = phys + align;
 132         /*
 133          *      Fill in addresses of the Comm Area Headers and Queues
 134          */
 135         *commaddr = base;
 136         init->CommHeaderAddress = cpu_to_le32((u32)phys);
 137         /*
 138          *      Increment the base address by the size of the CommArea
 139          */
 140         base = base + commsize;
 141         phys = phys + commsize;
 142         /*
 143          *       Place the Printf buffer area after the Fast I/O comm area.
 144          */
 145         dev->printfbuf = (void *)base;
 146         init->printfbuf = cpu_to_le32(phys);
 147         init->printfbufsiz = cpu_to_le32(printfbufsiz);
 148         memset(base, 0, printfbufsiz);
 149         return 1;
 150 }
 151
 152 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
 153 {
 154         q->numpending = 0;
 155         q->dev = dev;
 156         INIT_LIST_HEAD(&q->pendingq);
 157         init_waitqueue_head(&q->cmdready);
 158         INIT_LIST_HEAD(&q->cmdq);
 159         init_waitqueue_head(&q->qfull);
 160         spin_lock_init(&q->lockdata);
 161         q->lock = &q->lockdata;
 162         q->headers.producer = (__le32 *)mem;
 163         q->headers.consumer = (__le32 *)(mem+1);
 164         *(q->headers.producer) = cpu_to_le32(qsize);
 165         *(q->headers.consumer) = cpu_to_le32(qsize);
 166         q->entries = qsize;
 167 }
 168
 169 /**
 170  *      aac_send_shutdown               -       shutdown an adapter
 171  *      @dev: Adapter to shutdown
 172  *
 173  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
 174  */
 175
 176 int aac_send_shutdown(struct aac_dev * dev)
 177 {
 178         struct fib * fibctx;
 179         struct aac_close *cmd;
 180         int status;
 181
 182         fibctx = fib_alloc(dev);
 183         if (!fibctx)
 184                 return -ENOMEM;
 185         fib_init(fibctx);
 186
 187         cmd = (struct aac_close *) fib_data(fibctx);
 188
 189         cmd->command = cpu_to_le32(VM_CloseAll);
 190         cmd->cid = cpu_to_le32(0xffffffff);
 191
 192         status = fib_send(ContainerCommand,
 193                           fibctx,
 194                           sizeof(struct aac_close),
 195                           FsaNormal,
 196                           1, 1,
 197                           NULL, NULL);
 198
 199         if (status == 0)
 200                 fib_complete(fibctx);
 201         fib_free(fibctx);
 202         return status;
 203 }
 204
 205 /**
 206  *      aac_comm_init   -       Initialise FSA data structures
 207  *      @dev:   Adapter to initialise
 208  *
 209  *      Initializes the data structures that are required for the FSA commuication
 210  *      interface to operate.
 211  *      Returns
 212  *              1 - if we were able to init the commuication interface.
 213  *              0 - If there were errors initing. This is a fatal error.
 214  */
 215
 216 static int aac_comm_init(struct aac_dev * dev)
 217 {
 218         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
 219         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
 220         u32 *headers;
 221         struct aac_entry * queues;
 222         unsigned long size;
 223         struct aac_queue_block * comm = dev->queues;
 224         /*
 225          *      Now allocate and initialize the zone structures used as our
 226          *      pool of FIB context records.  The size of the zone is based
 227          *      on the system memory size.  We also initialize the mutex used
 228          *      to protect the zone.
 229          */
 230         spin_lock_init(&dev->fib_lock);
 231
 232         /*
 233          *      Allocate the physically contigous space for the commuication
 234          *      queue headers.
 235          */
 236
 237         size = hdrsize + queuesize;
 238
 239         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
 240                 return -ENOMEM;
 241
 242         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
 243
 244         /* Adapter to Host normal priority Command queue */
 245         comm->queue[HostNormCmdQueue].base = queues;
 246         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
 247         queues += HOST_NORM_CMD_ENTRIES;
 248         headers += 2;
 249
 250         /* Adapter to Host high priority command queue */
 251         comm->queue[HostHighCmdQueue].base = queues;
 252         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
 253
 254         queues += HOST_HIGH_CMD_ENTRIES;
 255         headers +=2;
 256
 257         /* Host to adapter normal priority command queue */
 258         comm->queue[AdapNormCmdQueue].base = queues;
 259         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
 260
 261         queues += ADAP_NORM_CMD_ENTRIES;
 262         headers += 2;
 263
 264         /* host to adapter high priority command queue */
 265         comm->queue[AdapHighCmdQueue].base = queues;
 266         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
 267
 268         queues += ADAP_HIGH_CMD_ENTRIES;
 269         headers += 2;
 270
 271         /* adapter to host normal priority response queue */
 272         comm->queue[HostNormRespQueue].base = queues;
 273         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
 274         queues += HOST_NORM_RESP_ENTRIES;
 275         headers += 2;
 276
 277         /* adapter to host high priority response queue */
 278         comm->queue[HostHighRespQueue].base = queues;
 279         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
 280
 281         queues += HOST_HIGH_RESP_ENTRIES;
 282         headers += 2;
 283
 284         /* host to adapter normal priority response queue */
 285         comm->queue[AdapNormRespQueue].base = queues;
 286         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
 287
 288         queues += ADAP_NORM_RESP_ENTRIES;
 289         headers += 2;
 290
 291         /* host to adapter high priority response queue */
 292         comm->queue[AdapHighRespQueue].base = queues;
 293         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
 294
 295         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
 296         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
 297         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
 298         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
 299
 300         return 0;
 301 }
 302
 303 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 304 {
 305         u32 status[5];
 306         struct Scsi_Host * host = dev->scsi_host_ptr;
 307
 308         /*
 309          *      Check the preferred comm settings, defaults from template.
 310          */
 311         dev->max_fib_size = sizeof(struct hw_fib);
 312         dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
 313                 - sizeof(struct aac_fibhdr)
 314                 - sizeof(struct aac_write) + sizeof(struct sgmap))
 315                         / sizeof(struct sgmap);
 316         if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 317           0, 0, 0, 0, 0, 0,
 318           status+0, status+1, status+2, status+3, status+4))
 319          && (status[0] == 0x00000001)) {
 320                 /*
 321                  *      status[1] >> 16         maximum command size in KB
 322                  *      status[1] & 0xFFFF      maximum FIB size
 323                  *      status[2] >> 16         maximum SG elements to driver
 324                  *      status[2] & 0xFFFF      maximum SG elements from driver
 325                  *      status[3] & 0xFFFF      maximum number FIBs outstanding
 326                  */
 327                 host->max_sectors = (status[1] >> 16) << 1;
 328                 dev->max_fib_size = status[1] & 0xFFFF;
 329                 host->sg_tablesize = status[2] >> 16;
 330                 dev->sg_tablesize = status[2] & 0xFFFF;
 331                 host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
 332                 /*
 333                  *      NOTE:
 334                  *      All these overrides are based on a fixed internal
 335                  *      knowledge and understanding of existing adapters,
 336                  *      acbsize should be set with caution.
 337                  */
 338                 if (acbsize == 512) {
 339                         host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
 340                         dev->max_fib_size = 512;
 341                         dev->sg_tablesize = host->sg_tablesize
 342                           = (512 - sizeof(struct aac_fibhdr)
 343                             - sizeof(struct aac_write) + sizeof(struct sgmap))
 344                              / sizeof(struct sgmap);
 345                         host->can_queue = AAC_NUM_IO_FIB;
 346                 } else if (acbsize == 2048) {
 347                         host->max_sectors = 512;
 348                         dev->max_fib_size = 2048;
 349                         host->sg_tablesize = 65;
 350                         dev->sg_tablesize = 81;
 351                         host->can_queue = 512 - AAC_NUM_MGT_FIB;
 352                 } else if (acbsize == 4096) {
 353                         host->max_sectors = 1024;
 354                         dev->max_fib_size = 4096;
 355                         host->sg_tablesize = 129;
 356                         dev->sg_tablesize = 166;
 357                         host->can_queue = 256 - AAC_NUM_MGT_FIB;
 358                 } else if (acbsize == 8192) {
 359                         host->max_sectors = 2048;
 360                         dev->max_fib_size = 8192;
 361                         host->sg_tablesize = 257;
 362                         dev->sg_tablesize = 337;
 363                         host->can_queue = 128 - AAC_NUM_MGT_FIB;
 364                 } else if (acbsize > 0) {
 365                         printk("Illegal acbsize=%d ignored\n", acbsize);
 366                 }
 367         }
 368         {
 369
 370                 if (numacb > 0) {
 371                         if (numacb < host->can_queue)
 372                                 host->can_queue = numacb;
 373                         else
 374                                 printk("numacb=%d ignored\n", numacb);
 375                 }
 376         }
 377
 378         /*
 379          *      Ok now init the communication subsystem
 380          */
 381
 382         dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 383         if (dev->queues == NULL) {
 384                 printk(KERN_ERR "Error could not allocate comm region.\n");
 385                 return NULL;
 386         }
 387         memset(dev->queues, 0, sizeof(struct aac_queue_block));
 388
 389         if (aac_comm_init(dev)<0){
 390                 kfree(dev->queues);
 391                 return NULL;
 392         }
 393         /*
 394          *      Initialize the list of fibs
 395          */
 396         if(fib_setup(dev)<0){
 397                 kfree(dev->queues);
 398                 return NULL;
 399         }
 400
 401         INIT_LIST_HEAD(&dev->fib_list);
 402         init_completion(&dev->aif_completion);
 403
 404         return dev;
 405 }
 406
 407