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 <asm/semaphore.h>
  43
  44 #include "aacraid.h"
  45
  46 struct aac_common aac_config;
  47
  48 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
  49 {
  50         unsigned char *base;
  51         unsigned long size, align;
  52         unsigned long fibsize = 4096;
  53         unsigned long printfbufsiz = 256;
  54         struct aac_init *init;
  55         dma_addr_t phys;
  56
  57         size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
  58
  59
  60         base = pci_alloc_consistent(dev->pdev, size, &phys);
  61
  62         if(base == NULL)
  63         {
  64                 printk(KERN_ERR "aacraid: unable to create mapping.\n");
  65                 return 0;
  66         }
  67         dev->comm_addr = (void *)base;
  68         dev->comm_phys = phys;
  69         dev->comm_size = size;
  70
  71         dev->init = (struct aac_init *)(base + fibsize);
  72         dev->init_pa = phys + fibsize;
  73
  74         init = dev->init;
  75
  76         init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
  77         init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
  78         init->fsrev = cpu_to_le32(dev->fsrev);
  79
  80         /*
  81          *      Adapter Fibs are the first thing allocated so that they
  82          *      start page aligned
  83          */
  84         dev->aif_base_va = (struct hw_fib *)base;
  85
  86         init->AdapterFibsVirtualAddress = 0;
  87         init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
  88         init->AdapterFibsSize = cpu_to_le32(fibsize);
  89         init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
  90         /*
  91          * number of 4k pages of host physical memory. The aacraid fw needs
  92          * this number to be less than 4gb worth of pages. num_physpages is in
  93          * system page units. New firmware doesn't have any issues with the
  94          * mapping system, but older Firmware did, and had *troubles* dealing
  95          * with the math overloading past 32 bits, thus we must limit this
  96          * field.
  97          *
  98          * This assumes the memory is mapped zero->n, which isnt
  99          * always true on real computers. It also has some slight problems
 100          * with the GART on x86-64. I've btw never tried DMA from PCI space
 101          * on this platform but don't be suprised if its problematic.
 102          */
 103 #ifndef CONFIG_GART_IOMMU
 104         if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
 105                 init->HostPhysMemPages =
 106                         cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
 107         } else
 108 #endif
 109         {
 110                 init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
 111         }
 112
 113
 114         /*
 115          * Increment the base address by the amount already used
 116          */
 117         base = base + fibsize + sizeof(struct aac_init);
 118         phys = (dma_addr_t)((ulong)phys + fibsize + sizeof(struct aac_init));
 119         /*
 120          *      Align the beginning of Headers to commalign
 121          */
 122         align = (commalign - ((unsigned long)(base) & (commalign - 1)));
 123         base = base + align;
 124         phys = phys + align;
 125         /*
 126          *      Fill in addresses of the Comm Area Headers and Queues
 127          */
 128         *commaddr = base;
 129         init->CommHeaderAddress = cpu_to_le32((u32)phys);
 130         /*
 131          *      Increment the base address by the size of the CommArea
 132          */
 133         base = base + commsize;
 134         phys = phys + commsize;
 135         /*
 136          *       Place the Printf buffer area after the Fast I/O comm area.
 137          */
 138         dev->printfbuf = (void *)base;
 139         init->printfbuf = cpu_to_le32(phys);
 140         init->printfbufsiz = cpu_to_le32(printfbufsiz);
 141         memset(base, 0, printfbufsiz);
 142         return 1;
 143 }
 144
 145 static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
 146 {
 147         q->numpending = 0;
 148         q->dev = dev;
 149         INIT_LIST_HEAD(&q->pendingq);
 150         init_waitqueue_head(&q->cmdready);
 151         INIT_LIST_HEAD(&q->cmdq);
 152         init_waitqueue_head(&q->qfull);
 153         spin_lock_init(&q->lockdata);
 154         q->lock = &q->lockdata;
 155         q->headers.producer = mem;
 156         q->headers.consumer = mem+1;
 157         *(q->headers.producer) = cpu_to_le32(qsize);
 158         *(q->headers.consumer) = cpu_to_le32(qsize);
 159         q->entries = qsize;
 160 }
 161
 162 /**
 163  *      aac_send_shutdown               -       shutdown an adapter
 164  *      @dev: Adapter to shutdown
 165  *
 166  *      This routine will send a VM_CloseAll (shutdown) request to the adapter.
 167  */
 168
 169 int aac_send_shutdown(struct aac_dev * dev)
 170 {
 171         struct fib * fibctx;
 172         struct aac_close *cmd;
 173         int status;
 174
 175         fibctx = fib_alloc(dev);
 176         fib_init(fibctx);
 177
 178         cmd = (struct aac_close *) fib_data(fibctx);
 179
 180         cmd->command = cpu_to_le32(VM_CloseAll);
 181         cmd->cid = cpu_to_le32(0xffffffff);
 182
 183         status = fib_send(ContainerCommand,
 184                           fibctx,
 185                           sizeof(struct aac_close),
 186                           FsaNormal,
 187                           1, 1,
 188                           NULL, NULL);
 189
 190         if (status == 0)
 191                 fib_complete(fibctx);
 192         fib_free(fibctx);
 193         return status;
 194 }
 195
 196 /**
 197  *      aac_comm_init   -       Initialise FSA data structures
 198  *      @dev:   Adapter to initialise
 199  *
 200  *      Initializes the data structures that are required for the FSA commuication
 201  *      interface to operate.
 202  *      Returns
 203  *              1 - if we were able to init the commuication interface.
 204  *              0 - If there were errors initing. This is a fatal error.
 205  */
 206
 207 int aac_comm_init(struct aac_dev * dev)
 208 {
 209         unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
 210         unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
 211         u32 *headers;
 212         struct aac_entry * queues;
 213         unsigned long size;
 214         struct aac_queue_block * comm = dev->queues;
 215         /*
 216          *      Now allocate and initialize the zone structures used as our
 217          *      pool of FIB context records.  The size of the zone is based
 218          *      on the system memory size.  We also initialize the mutex used
 219          *      to protect the zone.
 220          */
 221         spin_lock_init(&dev->fib_lock);
 222
 223         /*
 224          *      Allocate the physically contigous space for the commuication
 225          *      queue headers.
 226          */
 227
 228         size = hdrsize + queuesize;
 229
 230         if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
 231                 return -ENOMEM;
 232
 233         queues = (struct aac_entry *)(((ulong)headers) + hdrsize);
 234
 235         /* Adapter to Host normal priority Command queue */
 236         comm->queue[HostNormCmdQueue].base = queues;
 237         aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
 238         queues += HOST_NORM_CMD_ENTRIES;
 239         headers += 2;
 240
 241         /* Adapter to Host high priority command queue */
 242         comm->queue[HostHighCmdQueue].base = queues;
 243         aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
 244
 245         queues += HOST_HIGH_CMD_ENTRIES;
 246         headers +=2;
 247
 248         /* Host to adapter normal priority command queue */
 249         comm->queue[AdapNormCmdQueue].base = queues;
 250         aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
 251
 252         queues += ADAP_NORM_CMD_ENTRIES;
 253         headers += 2;
 254
 255         /* host to adapter high priority command queue */
 256         comm->queue[AdapHighCmdQueue].base = queues;
 257         aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
 258
 259         queues += ADAP_HIGH_CMD_ENTRIES;
 260         headers += 2;
 261
 262         /* adapter to host normal priority response queue */
 263         comm->queue[HostNormRespQueue].base = queues;
 264         aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
 265         queues += HOST_NORM_RESP_ENTRIES;
 266         headers += 2;
 267
 268         /* adapter to host high priority response queue */
 269         comm->queue[HostHighRespQueue].base = queues;
 270         aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
 271
 272         queues += HOST_HIGH_RESP_ENTRIES;
 273         headers += 2;
 274
 275         /* host to adapter normal priority response queue */
 276         comm->queue[AdapNormRespQueue].base = queues;
 277         aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
 278
 279         queues += ADAP_NORM_RESP_ENTRIES;
 280         headers += 2;
 281
 282         /* host to adapter high priority response queue */
 283         comm->queue[AdapHighRespQueue].base = queues;
 284         aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
 285
 286         comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
 287         comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
 288         comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
 289         comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
 290
 291         return 0;
 292 }
 293
 294 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 295 {
 296         /*
 297          *      Ok now init the communication subsystem
 298          */
 299
 300         dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 301         if (dev->queues == NULL) {
 302                 printk(KERN_ERR "Error could not allocate comm region.\n");
 303                 return NULL;
 304         }
 305         memset(dev->queues, 0, sizeof(struct aac_queue_block));
 306
 307         if (aac_comm_init(dev)<0){
 308                 kfree(dev->queues);
 309                 return NULL;
 310         }
 311         /*
 312          *      Initialize the list of fibs
 313          */
 314         if(fib_setup(dev)<0){
 315                 kfree(dev->queues);
 316                 return NULL;
 317         }
 318
 319         INIT_LIST_HEAD(&dev->fib_list);
 320         init_completion(&dev->aif_completion);
 321
 322         return dev;
 323 }
 324
 325