drivers/block/cpqarray.c

   1 /*
   2  *    Disk Array driver for Compaq SMART2 Controllers
   3  *    Copyright 1998 Compaq Computer Corporation
   4  *
   5  *    This program is free software; you can redistribute it and/or modify
   6  *    it under the terms of the GNU General Public License as published by
   7  *    the Free Software Foundation; either version 2 of the License, or
   8  *    (at your option) any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  20  *
  21  */
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/pci.h>
  25 #include <linux/bio.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/kernel.h>
  28 #include <linux/slab.h>
  29 #include <linux/delay.h>
  30 #include <linux/major.h>
  31 #include <linux/fs.h>
  32 #include <linux/blkpg.h>
  33 #include <linux/timer.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/seq_file.h>
  36 #include <linux/init.h>
  37 #include <linux/hdreg.h>
  38 #include <linux/mutex.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/genhd.h>
  42 #include <linux/scatterlist.h>
  43 #include <asm/uaccess.h>
  44 #include <asm/io.h>
  45
  46
  47 #define SMART2_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
  48
  49 #define DRIVER_NAME "Compaq SMART2 Driver (v 2.6.0)"
  50 #define DRIVER_VERSION SMART2_DRIVER_VERSION(2,6,0)
  51
  52 /* Embedded module documentation macros - see modules.h */
  53 /* Original author Chris Frantz - Compaq Computer Corporation */
  54 MODULE_AUTHOR("Compaq Computer Corporation");
  55 MODULE_DESCRIPTION("Driver for Compaq Smart2 Array Controllers version 2.6.0");
  56 MODULE_LICENSE("GPL");
  57
  58 #include "cpqarray.h"
  59 #include "ida_cmd.h"
  60 #include "smart1,2.h"
  61 #include "ida_ioctl.h"
  62
  63 #define READ_AHEAD      128
  64 #define NR_CMDS         128 /* This could probably go as high as ~400 */
  65
  66 #define MAX_CTLR        8
  67 #define CTLR_SHIFT      8
  68
  69 #define CPQARRAY_DMA_MASK       0xFFFFFFFF      /* 32 bit DMA */
  70
  71 static DEFINE_MUTEX(cpqarray_mutex);
  72 static int nr_ctlr;
  73 static ctlr_info_t *hba[MAX_CTLR];
  74
  75 static int eisa[8];
  76
  77 #define NR_PRODUCTS ARRAY_SIZE(products)
  78
  79 /*  board_id = Subsystem Device ID & Vendor ID
  80  *  product = Marketing Name for the board
  81  *  access = Address of the struct of function pointers
  82  */
  83 static struct board_type products[] = {
  84         { 0x0040110E, "IDA",                    &smart1_access },
  85         { 0x0140110E, "IDA-2",                  &smart1_access },
  86         { 0x1040110E, "IAES",                   &smart1_access },
  87         { 0x2040110E, "SMART",                  &smart1_access },
  88         { 0x3040110E, "SMART-2/E",              &smart2e_access },
  89         { 0x40300E11, "SMART-2/P",              &smart2_access },
  90         { 0x40310E11, "SMART-2SL",              &smart2_access },
  91         { 0x40320E11, "Smart Array 3200",       &smart2_access },
  92         { 0x40330E11, "Smart Array 3100ES",     &smart2_access },
  93         { 0x40340E11, "Smart Array 221",        &smart2_access },
  94         { 0x40400E11, "Integrated Array",       &smart4_access },
  95         { 0x40480E11, "Compaq Raid LC2",        &smart4_access },
  96         { 0x40500E11, "Smart Array 4200",       &smart4_access },
  97         { 0x40510E11, "Smart Array 4250ES",     &smart4_access },
  98         { 0x40580E11, "Smart Array 431",        &smart4_access },
  99 };
 100
 101 /* define the PCI info for the PCI cards this driver can control */
 102 static const struct pci_device_id cpqarray_pci_device_id[] =
 103 {
 104         { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
 105                 0x0E11, 0x4058, 0, 0, 0},       /* SA431 */
 106         { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
 107                 0x0E11, 0x4051, 0, 0, 0},      /* SA4250ES */
 108         { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
 109                 0x0E11, 0x4050, 0, 0, 0},      /* SA4200 */
 110         { PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
 111                 0x0E11, 0x4048, 0, 0, 0},       /* LC2 */
 112         { PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
 113                 0x0E11, 0x4040, 0, 0, 0},      /* Integrated Array */
 114         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
 115                 0x0E11, 0x4034, 0, 0, 0},       /* SA 221 */
 116         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
 117                 0x0E11, 0x4033, 0, 0, 0},       /* SA 3100ES*/
 118         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
 119                 0x0E11, 0x4032, 0, 0, 0},       /* SA 3200*/
 120         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
 121                 0x0E11, 0x4031, 0, 0, 0},       /* SA 2SL*/
 122         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
 123                 0x0E11, 0x4030, 0, 0, 0},       /* SA 2P */
 124         { 0 }
 125 };
 126
 127 MODULE_DEVICE_TABLE(pci, cpqarray_pci_device_id);
 128
 129 static struct gendisk *ida_gendisk[MAX_CTLR][NWD];
 130
 131 /* Debug... */
 132 #define DBG(s)  do { s } while(0)
 133 /* Debug (general info)... */
 134 #define DBGINFO(s) do { } while(0)
 135 /* Debug Paranoid... */
 136 #define DBGP(s)  do { } while(0)
 137 /* Debug Extra Paranoid... */
 138 #define DBGPX(s) do { } while(0)
 139
 140 static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev);
 141 static void __iomem *remap_pci_mem(ulong base, ulong size);
 142 static int cpqarray_eisa_detect(void);
 143 static int pollcomplete(int ctlr);
 144 static void getgeometry(int ctlr);
 145 static void start_fwbk(int ctlr);
 146
 147 static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool);
 148 static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool);
 149
 150 static void free_hba(int i);
 151 static int alloc_cpqarray_hba(void);
 152
 153 static int sendcmd(
 154         __u8    cmd,
 155         int     ctlr,
 156         void    *buff,
 157         size_t  size,
 158         unsigned int blk,
 159         unsigned int blkcnt,
 160         unsigned int log_unit );
 161
 162 static int ida_unlocked_open(struct block_device *bdev, fmode_t mode);
 163 static int ida_release(struct gendisk *disk, fmode_t mode);
 164 static int ida_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg);
 165 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 166 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
 167
 168 static void do_ida_request(struct request_queue *q);
 169 static void start_io(ctlr_info_t *h);
 170
 171 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
 172 static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
 173 static inline void complete_command(cmdlist_t *cmd, int timeout);
 174
 175 static irqreturn_t do_ida_intr(int irq, void *dev_id);
 176 static void ida_timer(unsigned long tdata);
 177 static int ida_revalidate(struct gendisk *disk);
 178 static int revalidate_allvol(ctlr_info_t *host);
 179 static int cpqarray_register_ctlr(int ctlr, struct pci_dev *pdev);
 180
 181 #ifdef CONFIG_PROC_FS
 182 static void ida_procinit(int i);
 183 #else
 184 static void ida_procinit(int i) {}
 185 #endif
 186
 187 static inline drv_info_t *get_drv(struct gendisk *disk)
 188 {
 189         return disk->private_data;
 190 }
 191
 192 static inline ctlr_info_t *get_host(struct gendisk *disk)
 193 {
 194         return disk->queue->queuedata;
 195 }
 196
 197
 198 static const struct block_device_operations ida_fops  = {
 199         .owner          = THIS_MODULE,
 200         .open           = ida_unlocked_open,
 201         .release        = ida_release,
 202         .ioctl          = ida_ioctl,
 203         .getgeo         = ida_getgeo,
 204         .revalidate_disk= ida_revalidate,
 205 };
 206
 207
 208 #ifdef CONFIG_PROC_FS
 209
 210 static struct proc_dir_entry *proc_array;
 211 static const struct file_operations ida_proc_fops;
 212
 213 /*
 214  * Get us a file in /proc/array that says something about each controller.
 215  * Create /proc/array if it doesn't exist yet.
 216  */
 217 static void __init ida_procinit(int i)
 218 {
 219         if (proc_array == NULL) {
 220                 proc_array = proc_mkdir("driver/cpqarray", NULL);
 221                 if (!proc_array) return;
 222         }
 223
 224         proc_create_data(hba[i]->devname, 0, proc_array, &ida_proc_fops, hba[i]);
 225 }
 226
 227 /*
 228  * Report information about this controller.
 229  */
 230 static int ida_proc_show(struct seq_file *m, void *v)
 231 {
 232         int i, ctlr;
 233         ctlr_info_t *h = (ctlr_info_t*)m->private;
 234         drv_info_t *drv;
 235 #ifdef CPQ_PROC_PRINT_QUEUES
 236         cmdlist_t *c;
 237         unsigned long flags;
 238 #endif
 239
 240         ctlr = h->ctlr;
 241         seq_printf(m, "%s:  Compaq %s Controller\n"
 242                 "       Board ID: 0x%08lx\n"
 243                 "       Firmware Revision: %c%c%c%c\n"
 244                 "       Controller Sig: 0x%08lx\n"
 245                 "       Memory Address: 0x%08lx\n"
 246                 "       I/O Port: 0x%04x\n"
 247                 "       IRQ: %d\n"
 248                 "       Logical drives: %d\n"
 249                 "       Physical drives: %d\n\n"
 250                 "       Current Q depth: %d\n"
 251                 "       Max Q depth since init: %d\n\n",
 252                 h->devname,
 253                 h->product_name,
 254                 (unsigned long)h->board_id,
 255                 h->firm_rev[0], h->firm_rev[1], h->firm_rev[2], h->firm_rev[3],
 256                 (unsigned long)h->ctlr_sig, (unsigned long)h->vaddr,
 257                 (unsigned int) h->io_mem_addr, (unsigned int)h->intr,
 258                 h->log_drives, h->phys_drives,
 259                 h->Qdepth, h->maxQsinceinit);
 260
 261         seq_puts(m, "Logical Drive Info:\n");
 262
 263         for(i=0; i<h->log_drives; i++) {
 264                 drv = &h->drv[i];
 265                 seq_printf(m, "ida/c%dd%d: blksz=%d nr_blks=%d\n",
 266                                 ctlr, i, drv->blk_size, drv->nr_blks);
 267         }
 268
 269 #ifdef CPQ_PROC_PRINT_QUEUES
 270         spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
 271         seq_puts(m, "\nCurrent Queues:\n");
 272
 273         c = h->reqQ;
 274         seq_printf(m, "reqQ = %p", c);
 275         if (c) c=c->next;
 276         while(c && c != h->reqQ) {
 277                 seq_printf(m, "->%p", c);
 278                 c=c->next;
 279         }
 280
 281         c = h->cmpQ;
 282         seq_printf(m, "\ncmpQ = %p", c);
 283         if (c) c=c->next;
 284         while(c && c != h->cmpQ) {
 285                 seq_printf(m, "->%p", c);
 286                 c=c->next;
 287         }
 288
 289         seq_putc(m, '\n');
 290         spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
 291 #endif
 292         seq_printf(m, "nr_allocs = %d\nnr_frees = %d\n",
 293                         h->nr_allocs, h->nr_frees);
 294         return 0;
 295 }
 296
 297 static int ida_proc_open(struct inode *inode, struct file *file)
 298 {
 299         return single_open(file, ida_proc_show, PDE(inode)->data);
 300 }
 301
 302 static const struct file_operations ida_proc_fops = {
 303         .owner          = THIS_MODULE,
 304         .open           = ida_proc_open,
 305         .read           = seq_read,
 306         .llseek         = seq_lseek,
 307         .release        = single_release,
 308 };
 309 #endif /* CONFIG_PROC_FS */
 310
 311 module_param_array(eisa, int, NULL, 0);
 312
 313 static void release_io_mem(ctlr_info_t *c)
 314 {
 315         /* if IO mem was not protected do nothing */
 316         if( c->io_mem_addr == 0)
 317                 return;
 318         release_region(c->io_mem_addr, c->io_mem_length);
 319         c->io_mem_addr = 0;
 320         c->io_mem_length = 0;
 321 }
 322
 323 static void __devexit cpqarray_remove_one(int i)
 324 {
 325         int j;
 326         char buff[4];
 327
 328         /* sendcmd will turn off interrupt, and send the flush...
 329          * To write all data in the battery backed cache to disks
 330          * no data returned, but don't want to send NULL to sendcmd */
 331         if( sendcmd(FLUSH_CACHE, i, buff, 4, 0, 0, 0))
 332         {
 333                 printk(KERN_WARNING "Unable to flush cache on controller %d\n",
 334                                 i);
 335         }
 336         free_irq(hba[i]->intr, hba[i]);
 337         iounmap(hba[i]->vaddr);
 338         unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
 339         del_timer(&hba[i]->timer);
 340         remove_proc_entry(hba[i]->devname, proc_array);
 341         pci_free_consistent(hba[i]->pci_dev,
 342                         NR_CMDS * sizeof(cmdlist_t), (hba[i]->cmd_pool),
 343                         hba[i]->cmd_pool_dhandle);
 344         kfree(hba[i]->cmd_pool_bits);
 345         for(j = 0; j < NWD; j++) {
 346                 if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
 347                         del_gendisk(ida_gendisk[i][j]);
 348                 put_disk(ida_gendisk[i][j]);
 349         }
 350         blk_cleanup_queue(hba[i]->queue);
 351         release_io_mem(hba[i]);
 352         free_hba(i);
 353 }
 354
 355 static void __devexit cpqarray_remove_one_pci (struct pci_dev *pdev)
 356 {
 357         int i;
 358         ctlr_info_t *tmp_ptr;
 359
 360         if (pci_get_drvdata(pdev) == NULL) {
 361                 printk( KERN_ERR "cpqarray: Unable to remove device \n");
 362                 return;
 363         }
 364
 365         tmp_ptr = pci_get_drvdata(pdev);
 366         i = tmp_ptr->ctlr;
 367         if (hba[i] == NULL) {
 368                 printk(KERN_ERR "cpqarray: controller %d appears to have"
 369                         "already been removed \n", i);
 370                 return;
 371         }
 372         pci_set_drvdata(pdev, NULL);
 373
 374         cpqarray_remove_one(i);
 375 }
 376
 377 /* removing an instance that was not removed automatically..
 378  * must be an eisa card.
 379  */
 380 static void __devexit cpqarray_remove_one_eisa (int i)
 381 {
 382         if (hba[i] == NULL) {
 383                 printk(KERN_ERR "cpqarray: controller %d appears to have"
 384                         "already been removed \n", i);
 385                 return;
 386         }
 387         cpqarray_remove_one(i);
 388 }
 389
 390 /* pdev is NULL for eisa */
 391 static int __devinit cpqarray_register_ctlr( int i, struct pci_dev *pdev)
 392 {
 393         struct request_queue *q;
 394         int j;
 395
 396         /*
 397          * register block devices
 398          * Find disks and fill in structs
 399          * Get an interrupt, set the Q depth and get into /proc
 400          */
 401
 402         /* If this successful it should insure that we are the only */
 403         /* instance of the driver */
 404         if (register_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname)) {
 405                 goto Enomem4;
 406         }
 407         hba[i]->access.set_intr_mask(hba[i], 0);
 408         if (request_irq(hba[i]->intr, do_ida_intr,
 409                 IRQF_DISABLED|IRQF_SHARED, hba[i]->devname, hba[i]))
 410         {
 411                 printk(KERN_ERR "cpqarray: Unable to get irq %d for %s\n",
 412                                 hba[i]->intr, hba[i]->devname);
 413                 goto Enomem3;
 414         }
 415
 416         for (j=0; j<NWD; j++) {
 417                 ida_gendisk[i][j] = alloc_disk(1 << NWD_SHIFT);
 418                 if (!ida_gendisk[i][j])
 419                         goto Enomem2;
 420         }
 421
 422         hba[i]->cmd_pool = pci_alloc_consistent(
 423                 hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
 424                 &(hba[i]->cmd_pool_dhandle));
 425         hba[i]->cmd_pool_bits = kcalloc(
 426                 DIV_ROUND_UP(NR_CMDS, BITS_PER_LONG), sizeof(unsigned long),
 427                 GFP_KERNEL);
 428
 429         if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
 430                         goto Enomem1;
 431
 432         memset(hba[i]->cmd_pool, 0, NR_CMDS * sizeof(cmdlist_t));
 433         printk(KERN_INFO "cpqarray: Finding drives on %s",
 434                 hba[i]->devname);
 435
 436         spin_lock_init(&hba[i]->lock);
 437         q = blk_init_queue(do_ida_request, &hba[i]->lock);
 438         if (!q)
 439                 goto Enomem1;
 440
 441         hba[i]->queue = q;
 442         q->queuedata = hba[i];
 443
 444         getgeometry(i);
 445         start_fwbk(i);
 446
 447         ida_procinit(i);
 448
 449         if (pdev)
 450                 blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
 451
 452         /* This is a hardware imposed limit. */
 453         blk_queue_max_segments(q, SG_MAX);
 454
 455         init_timer(&hba[i]->timer);
 456         hba[i]->timer.expires = jiffies + IDA_TIMER;
 457         hba[i]->timer.data = (unsigned long)hba[i];
 458         hba[i]->timer.function = ida_timer;
 459         add_timer(&hba[i]->timer);
 460
 461         /* Enable IRQ now that spinlock and rate limit timer are set up */
 462         hba[i]->access.set_intr_mask(hba[i], FIFO_NOT_EMPTY);
 463
 464         for(j=0; j<NWD; j++) {
 465                 struct gendisk *disk = ida_gendisk[i][j];
 466                 drv_info_t *drv = &hba[i]->drv[j];
 467                 sprintf(disk->disk_name, "ida/c%dd%d", i, j);
 468                 disk->major = COMPAQ_SMART2_MAJOR + i;
 469                 disk->first_minor = j<<NWD_SHIFT;
 470                 disk->fops = &ida_fops;
 471                 if (j && !drv->nr_blks)
 472                         continue;
 473                 blk_queue_logical_block_size(hba[i]->queue, drv->blk_size);
 474                 set_capacity(disk, drv->nr_blks);
 475                 disk->queue = hba[i]->queue;
 476                 disk->private_data = drv;
 477                 add_disk(disk);
 478         }
 479
 480         /* done ! */
 481         return(i);
 482
 483 Enomem1:
 484         nr_ctlr = i;
 485         kfree(hba[i]->cmd_pool_bits);
 486         if (hba[i]->cmd_pool)
 487                 pci_free_consistent(hba[i]->pci_dev, NR_CMDS*sizeof(cmdlist_t),
 488                                     hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
 489 Enomem2:
 490         while (j--) {
 491                 put_disk(ida_gendisk[i][j]);
 492                 ida_gendisk[i][j] = NULL;
 493         }
 494         free_irq(hba[i]->intr, hba[i]);
 495 Enomem3:
 496         unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
 497 Enomem4:
 498         if (pdev)
 499                 pci_set_drvdata(pdev, NULL);
 500         release_io_mem(hba[i]);
 501         free_hba(i);
 502
 503         printk( KERN_ERR "cpqarray: out of memory");
 504
 505         return -1;
 506 }
 507
 508 static int __devinit cpqarray_init_one( struct pci_dev *pdev,
 509         const struct pci_device_id *ent)
 510 {
 511         int i;
 512
 513         printk(KERN_DEBUG "cpqarray: Device 0x%x has been found at"
 514                         " bus %d dev %d func %d\n",
 515                         pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
 516                         PCI_FUNC(pdev->devfn));
 517         i = alloc_cpqarray_hba();
 518         if( i < 0 )
 519                 return (-1);
 520         memset(hba[i], 0, sizeof(ctlr_info_t));
 521         sprintf(hba[i]->devname, "ida%d", i);
 522         hba[i]->ctlr = i;
 523         /* Initialize the pdev driver private data */
 524         pci_set_drvdata(pdev, hba[i]);
 525
 526         if (cpqarray_pci_init(hba[i], pdev) != 0) {
 527                 pci_set_drvdata(pdev, NULL);
 528                 release_io_mem(hba[i]);
 529                 free_hba(i);
 530                 return -1;
 531         }
 532
 533         return (cpqarray_register_ctlr(i, pdev));
 534 }
 535
 536 static struct pci_driver cpqarray_pci_driver = {
 537         .name = "cpqarray",
 538         .probe = cpqarray_init_one,
 539         .remove = __devexit_p(cpqarray_remove_one_pci),
 540         .id_table = cpqarray_pci_device_id,
 541 };
 542
 543 /*
 544  *  This is it.  Find all the controllers and register them.
 545  *  returns the number of block devices registered.
 546  */
 547 static int __init cpqarray_init(void)
 548 {
 549         int num_cntlrs_reg = 0;
 550         int i;
 551         int rc = 0;
 552
 553         /* detect controllers */
 554         printk(DRIVER_NAME "\n");
 555
 556         rc = pci_register_driver(&cpqarray_pci_driver);
 557         if (rc)
 558                 return rc;
 559         cpqarray_eisa_detect();
 560
 561         for (i=0; i < MAX_CTLR; i++) {
 562                 if (hba[i] != NULL)
 563                         num_cntlrs_reg++;
 564         }
 565
 566         if (num_cntlrs_reg)
 567                 return 0;
 568         else {
 569                 pci_unregister_driver(&cpqarray_pci_driver);
 570                 return -ENODEV;
 571         }
 572 }
 573
 574 /* Function to find the first free pointer into our hba[] array */
 575 /* Returns -1 if no free entries are left.  */
 576 static int alloc_cpqarray_hba(void)
 577 {
 578         int i;
 579
 580         for(i=0; i< MAX_CTLR; i++) {
 581                 if (hba[i] == NULL) {
 582                         hba[i] = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
 583                         if(hba[i]==NULL) {
 584                                 printk(KERN_ERR "cpqarray: out of memory.\n");
 585                                 return (-1);
 586                         }
 587                         return (i);
 588                 }
 589         }
 590         printk(KERN_WARNING "cpqarray: This driver supports a maximum"
 591                 " of 8 controllers.\n");
 592         return(-1);
 593 }
 594
 595 static void free_hba(int i)
 596 {
 597         kfree(hba[i]);
 598         hba[i]=NULL;
 599 }
 600
 601 /*
 602  * Find the IO address of the controller, its IRQ and so forth.  Fill
 603  * in some basic stuff into the ctlr_info_t structure.
 604  */
 605 static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 606 {
 607         ushort vendor_id, device_id, command;
 608         unchar cache_line_size, latency_timer;
 609         unchar irq, revision;
 610         unsigned long addr[6];
 611         __u32 board_id;
 612
 613         int i;
 614
 615         c->pci_dev = pdev;
 616         pci_set_master(pdev);
 617         if (pci_enable_device(pdev)) {
 618                 printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
 619                 return -1;
 620         }
 621         vendor_id = pdev->vendor;
 622         device_id = pdev->device;
 623         revision  = pdev->revision;
 624         irq = pdev->irq;
 625
 626         for(i=0; i<6; i++)
 627                 addr[i] = pci_resource_start(pdev, i);
 628
 629         if (pci_set_dma_mask(pdev, CPQARRAY_DMA_MASK) != 0)
 630         {
 631                 printk(KERN_ERR "cpqarray: Unable to set DMA mask\n");
 632                 return -1;
 633         }
 634
 635         pci_read_config_word(pdev, PCI_COMMAND, &command);
 636         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
 637         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
 638
 639         pci_read_config_dword(pdev, 0x2c, &board_id);
 640
 641         /* check to see if controller has been disabled */
 642         if(!(command & 0x02)) {
 643                 printk(KERN_WARNING
 644                         "cpqarray: controller appears to be disabled\n");
 645                 return(-1);
 646         }
 647
 648 DBGINFO(
 649         printk("vendor_id = %x\n", vendor_id);
 650         printk("device_id = %x\n", device_id);
 651         printk("command = %x\n", command);
 652         for(i=0; i<6; i++)
 653                 printk("addr[%d] = %lx\n", i, addr[i]);
 654         printk("revision = %x\n", revision);
 655         printk("irq = %x\n", irq);
 656         printk("cache_line_size = %x\n", cache_line_size);
 657         printk("latency_timer = %x\n", latency_timer);
 658         printk("board_id = %x\n", board_id);
 659 );
 660
 661         c->intr = irq;
 662
 663         for(i=0; i<6; i++) {
 664                 if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)
 665                 { /* IO space */
 666                         c->io_mem_addr = addr[i];
 667                         c->io_mem_length = pci_resource_end(pdev, i)
 668                                 - pci_resource_start(pdev, i) + 1;
 669                         if(!request_region( c->io_mem_addr, c->io_mem_length,
 670                                 "cpqarray"))
 671                         {
 672                                 printk( KERN_WARNING "cpqarray I/O memory range already in use addr %lx length = %ld\n", c->io_mem_addr, c->io_mem_length);
 673                                 c->io_mem_addr = 0;
 674                                 c->io_mem_length = 0;
 675                         }
 676                         break;
 677                 }
 678         }
 679
 680         c->paddr = 0;
 681         for(i=0; i<6; i++)
 682                 if (!(pci_resource_flags(pdev, i) &
 683                                 PCI_BASE_ADDRESS_SPACE_IO)) {
 684                         c->paddr = pci_resource_start (pdev, i);
 685                         break;
 686                 }
 687         if (!c->paddr)
 688                 return -1;
 689         c->vaddr = remap_pci_mem(c->paddr, 128);
 690         if (!c->vaddr)
 691                 return -1;
 692         c->board_id = board_id;
 693
 694         for(i=0; i<NR_PRODUCTS; i++) {
 695                 if (board_id == products[i].board_id) {
 696                         c->product_name = products[i].product_name;
 697                         c->access = *(products[i].access);
 698                         break;
 699                 }
 700         }
 701         if (i == NR_PRODUCTS) {
 702                 printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
 703                         " to access the SMART Array controller %08lx\n",
 704                                 (unsigned long)board_id);
 705                 return -1;
 706         }
 707
 708         return 0;
 709 }
 710
 711 /*
 712  * Map (physical) PCI mem into (virtual) kernel space
 713  */
 714 static void __iomem *remap_pci_mem(ulong base, ulong size)
 715 {
 716         ulong page_base        = ((ulong) base) & PAGE_MASK;
 717         ulong page_offs        = ((ulong) base) - page_base;
 718         void __iomem *page_remapped    = ioremap(page_base, page_offs+size);
 719
 720         return (page_remapped ? (page_remapped + page_offs) : NULL);
 721 }
 722
 723 #ifndef MODULE
 724 /*
 725  * Config string is a comma separated set of i/o addresses of EISA cards.
 726  */
 727 static int cpqarray_setup(char *str)
 728 {
 729         int i, ints[9];
 730
 731         (void)get_options(str, ARRAY_SIZE(ints), ints);
 732
 733         for(i=0; i<ints[0] && i<8; i++)
 734                 eisa[i] = ints[i+1];
 735         return 1;
 736 }
 737
 738 __setup("smart2=", cpqarray_setup);
 739
 740 #endif
 741
 742 /*
 743  * Find an EISA controller's signature.  Set up an hba if we find it.
 744  */
 745 static int __devinit cpqarray_eisa_detect(void)
 746 {
 747         int i=0, j;
 748         __u32 board_id;
 749         int intr;
 750         int ctlr;
 751         int num_ctlr = 0;
 752
 753         while(i<8 && eisa[i]) {
 754                 ctlr = alloc_cpqarray_hba();
 755                 if(ctlr == -1)
 756                         break;
 757                 board_id = inl(eisa[i]+0xC80);
 758                 for(j=0; j < NR_PRODUCTS; j++)
 759                         if (board_id == products[j].board_id)
 760                                 break;
 761
 762                 if (j == NR_PRODUCTS) {
 763                         printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
 764                                 " to access the SMART Array controller %08lx\n",                                 (unsigned long)board_id);
 765                         continue;
 766                 }
 767
 768                 memset(hba[ctlr], 0, sizeof(ctlr_info_t));
 769                 hba[ctlr]->io_mem_addr = eisa[i];
 770                 hba[ctlr]->io_mem_length = 0x7FF;
 771                 if(!request_region(hba[ctlr]->io_mem_addr,
 772                                 hba[ctlr]->io_mem_length,
 773                                 "cpqarray"))
 774                 {
 775                         printk(KERN_WARNING "cpqarray: I/O range already in "
 776                                         "use addr = %lx length = %ld\n",
 777                                         hba[ctlr]->io_mem_addr,
 778                                         hba[ctlr]->io_mem_length);
 779                         free_hba(ctlr);
 780                         continue;
 781                 }
 782
 783                 /*
 784                  * Read the config register to find our interrupt
 785                  */
 786                 intr = inb(eisa[i]+0xCC0) >> 4;
 787                 if (intr & 1) intr = 11;
 788                 else if (intr & 2) intr = 10;
 789                 else if (intr & 4) intr = 14;
 790                 else if (intr & 8) intr = 15;
 791
 792                 hba[ctlr]->intr = intr;
 793                 sprintf(hba[ctlr]->devname, "ida%d", nr_ctlr);
 794                 hba[ctlr]->product_name = products[j].product_name;
 795                 hba[ctlr]->access = *(products[j].access);
 796                 hba[ctlr]->ctlr = ctlr;
 797                 hba[ctlr]->board_id = board_id;
 798                 hba[ctlr]->pci_dev = NULL; /* not PCI */
 799
 800 DBGINFO(
 801         printk("i = %d, j = %d\n", i, j);
 802         printk("irq = %x\n", intr);
 803         printk("product name = %s\n", products[j].product_name);
 804         printk("board_id = %x\n", board_id);
 805 );
 806
 807                 num_ctlr++;
 808                 i++;
 809
 810                 if (cpqarray_register_ctlr(ctlr, NULL) == -1)
 811                         printk(KERN_WARNING
 812                                 "cpqarray: Can't register EISA controller %d\n",
 813                                 ctlr);
 814
 815         }
 816
 817         return num_ctlr;
 818 }
 819
 820 /*
 821  * Open.  Make sure the device is really there.
 822  */
 823 static int ida_open(struct block_device *bdev, fmode_t mode)
 824 {
 825         drv_info_t *drv = get_drv(bdev->bd_disk);
 826         ctlr_info_t *host = get_host(bdev->bd_disk);
 827
 828         DBGINFO(printk("ida_open %s\n", bdev->bd_disk->disk_name));
 829         /*
 830          * Root is allowed to open raw volume zero even if it's not configured
 831          * so array config can still work.  I don't think I really like this,
 832          * but I'm already using way to many device nodes to claim another one
 833          * for "raw controller".
 834          */
 835         if (!drv->nr_blks) {
 836                 if (!capable(CAP_SYS_RAWIO))
 837                         return -ENXIO;
 838                 if (!capable(CAP_SYS_ADMIN) && drv != host->drv)
 839                         return -ENXIO;
 840         }
 841         host->usage_count++;
 842         return 0;
 843 }
 844
 845 static int ida_unlocked_open(struct block_device *bdev, fmode_t mode)
 846 {
 847         int ret;
 848
 849         mutex_lock(&cpqarray_mutex);
 850         ret = ida_open(bdev, mode);
 851         mutex_unlock(&cpqarray_mutex);
 852
 853         return ret;
 854 }
 855
 856 /*
 857  * Close.  Sync first.
 858  */
 859 static int ida_release(struct gendisk *disk, fmode_t mode)
 860 {
 861         ctlr_info_t *host;
 862
 863         mutex_lock(&cpqarray_mutex);
 864         host = get_host(disk);
 865         host->usage_count--;
 866         mutex_unlock(&cpqarray_mutex);
 867
 868         return 0;
 869 }
 870
 871 /*
 872  * Enqueuing and dequeuing functions for cmdlists.
 873  */
 874 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c)
 875 {
 876         if (*Qptr == NULL) {
 877                 *Qptr = c;
 878                 c->next = c->prev = c;
 879         } else {
 880                 c->prev = (*Qptr)->prev;
 881                 c->next = (*Qptr);
 882                 (*Qptr)->prev->next = c;
 883                 (*Qptr)->prev = c;
 884         }
 885 }
 886
 887 static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
 888 {
 889         if (c && c->next != c) {
 890                 if (*Qptr == c) *Qptr = c->next;
 891                 c->prev->next = c->next;
 892                 c->next->prev = c->prev;
 893         } else {
 894                 *Qptr = NULL;
 895         }
 896         return c;
 897 }
 898
 899 /*
 900  * Get a request and submit it to the controller.
 901  * This routine needs to grab all the requests it possibly can from the
 902  * req Q and submit them.  Interrupts are off (and need to be off) when you
 903  * are in here (either via the dummy do_ida_request functions or by being
 904  * called from the interrupt handler
 905  */
 906 static void do_ida_request(struct request_queue *q)
 907 {
 908         ctlr_info_t *h = q->queuedata;
 909         cmdlist_t *c;
 910         struct request *creq;
 911         struct scatterlist tmp_sg[SG_MAX];
 912         int i, dir, seg;
 913
 914 queue_next:
 915         creq = blk_peek_request(q);
 916         if (!creq)
 917                 goto startio;
 918
 919         BUG_ON(creq->nr_phys_segments > SG_MAX);
 920
 921         if ((c = cmd_alloc(h,1)) == NULL)
 922                 goto startio;
 923
 924         blk_start_request(creq);
 925
 926         c->ctlr = h->ctlr;
 927         c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
 928         c->hdr.size = sizeof(rblk_t) >> 2;
 929         c->size += sizeof(rblk_t);
 930
 931         c->req.hdr.blk = blk_rq_pos(creq);
 932         c->rq = creq;
 933 DBGPX(
 934         printk("sector=%d, nr_sectors=%u\n",
 935                blk_rq_pos(creq), blk_rq_sectors(creq));
 936 );
 937         sg_init_table(tmp_sg, SG_MAX);
 938         seg = blk_rq_map_sg(q, creq, tmp_sg);
 939
 940         /* Now do all the DMA Mappings */
 941         if (rq_data_dir(creq) == READ)
 942                 dir = PCI_DMA_FROMDEVICE;
 943         else
 944                 dir = PCI_DMA_TODEVICE;
 945         for( i=0; i < seg; i++)
 946         {
 947                 c->req.sg[i].size = tmp_sg[i].length;
 948                 c->req.sg[i].addr = (__u32) pci_map_page(h->pci_dev,
 949                                                  sg_page(&tmp_sg[i]),
 950                                                  tmp_sg[i].offset,
 951                                                  tmp_sg[i].length, dir);
 952         }
 953 DBGPX(  printk("Submitting %u sectors in %d segments\n", blk_rq_sectors(creq), seg); );
 954         c->req.hdr.sg_cnt = seg;
 955         c->req.hdr.blk_cnt = blk_rq_sectors(creq);
 956         c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
 957         c->type = CMD_RWREQ;
 958
 959         /* Put the request on the tail of the request queue */
 960         addQ(&h->reqQ, c);
 961         h->Qdepth++;
 962         if (h->Qdepth > h->maxQsinceinit)
 963                 h->maxQsinceinit = h->Qdepth;
 964
 965         goto queue_next;
 966
 967 startio:
 968         start_io(h);
 969 }
 970
 971 /*
 972  * start_io submits everything on a controller's request queue
 973  * and moves it to the completion queue.
 974  *
 975  * Interrupts had better be off if you're in here
 976  */
 977 static void start_io(ctlr_info_t *h)
 978 {
 979         cmdlist_t *c;
 980
 981         while((c = h->reqQ) != NULL) {
 982                 /* Can't do anything if we're busy */
 983                 if (h->access.fifo_full(h) == 0)
 984                         return;
 985
 986                 /* Get the first entry from the request Q */
 987                 removeQ(&h->reqQ, c);
 988                 h->Qdepth--;
 989
 990                 /* Tell the controller to do our bidding */
 991                 h->access.submit_command(h, c);
 992
 993                 /* Get onto the completion Q */
 994                 addQ(&h->cmpQ, c);
 995         }
 996 }
 997
 998 /*
 999  * Mark all buffers that cmd was responsible for
1000  */
1001 static inline void complete_command(cmdlist_t *cmd, int timeout)
1002 {
1003         struct request *rq = cmd->rq;
1004         int error = 0;
1005         int i, ddir;
1006
1007         if (cmd->req.hdr.rcode & RCODE_NONFATAL &&
1008            (hba[cmd->ctlr]->misc_tflags & MISC_NONFATAL_WARN) == 0) {
1009                 printk(KERN_NOTICE "Non Fatal error on ida/c%dd%d\n",
1010                                 cmd->ctlr, cmd->hdr.unit);
1011                 hba[cmd->ctlr]->misc_tflags |= MISC_NONFATAL_WARN;
1012         }
1013         if (cmd->req.hdr.rcode & RCODE_FATAL) {
1014                 printk(KERN_WARNING "Fatal error on ida/c%dd%d\n",
1015                                 cmd->ctlr, cmd->hdr.unit);
1016                 error = -EIO;
1017         }
1018         if (cmd->req.hdr.rcode & RCODE_INVREQ) {
1019                                 printk(KERN_WARNING "Invalid request on ida/c%dd%d = (cmd=%x sect=%d cnt=%d sg=%d ret=%x)\n",
1020                                 cmd->ctlr, cmd->hdr.unit, cmd->req.hdr.cmd,
1021                                 cmd->req.hdr.blk, cmd->req.hdr.blk_cnt,
1022                                 cmd->req.hdr.sg_cnt, cmd->req.hdr.rcode);
1023                 error = -EIO;
1024         }
1025         if (timeout)
1026                 error = -EIO;
1027         /* unmap the DMA mapping for all the scatter gather elements */
1028         if (cmd->req.hdr.cmd == IDA_READ)
1029                 ddir = PCI_DMA_FROMDEVICE;
1030         else
1031                 ddir = PCI_DMA_TODEVICE;
1032         for(i=0; i<cmd->req.hdr.sg_cnt; i++)
1033                 pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
1034                                 cmd->req.sg[i].size, ddir);
1035
1036         DBGPX(printk("Done with %p\n", rq););
1037         __blk_end_request_all(rq, error);
1038 }
1039
1040 /*
1041  *  The controller will interrupt us upon completion of commands.
1042  *  Find the command on the completion queue, remove it, tell the OS and
1043  *  try to queue up more IO
1044  */
1045 static irqreturn_t do_ida_intr(int irq, void *dev_id)
1046 {
1047         ctlr_info_t *h = dev_id;
1048         cmdlist_t *c;
1049         unsigned long istat;
1050         unsigned long flags;
1051         __u32 a,a1;
1052
1053         istat = h->access.intr_pending(h);
1054         /* Is this interrupt for us? */
1055         if (istat == 0)
1056                 return IRQ_NONE;
1057
1058         /*
1059          * If there are completed commands in the completion queue,
1060          * we had better do something about it.
1061          */
1062         spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
1063         if (istat & FIFO_NOT_EMPTY) {
1064                 while((a = h->access.command_completed(h))) {
1065                         a1 = a; a &= ~3;
1066                         if ((c = h->cmpQ) == NULL)
1067                         {
1068                                 printk(KERN_WARNING "cpqarray: Completion of %08lx ignored\n", (unsigned long)a1);
1069                                 continue;
1070                         }
1071                         while(c->busaddr != a) {
1072                                 c = c->next;
1073                                 if (c == h->cmpQ)
1074                                         break;
1075                         }
1076                         /*
1077                          * If we've found the command, take it off the
1078                          * completion Q and free it
1079                          */
1080                         if (c->busaddr == a) {
1081                                 removeQ(&h->cmpQ, c);
1082                                 /*  Check for invalid command.
1083                                  *  Controller returns command error,
1084                                  *  But rcode = 0.
1085                                  */
1086
1087                                 if((a1 & 0x03) && (c->req.hdr.rcode == 0))
1088                                 {
1089                                         c->req.hdr.rcode = RCODE_INVREQ;
1090                                 }
1091                                 if (c->type == CMD_RWREQ) {
1092                                         complete_command(c, 0);
1093                                         cmd_free(h, c, 1);
1094                                 } else if (c->type == CMD_IOCTL_PEND) {
1095                                         c->type = CMD_IOCTL_DONE;
1096                                 }
1097                                 continue;
1098                         }
1099                 }
1100         }
1101
1102         /*
1103          * See if we can queue up some more IO
1104          */
1105         do_ida_request(h->queue);
1106         spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
1107         return IRQ_HANDLED;
1108 }
1109
1110 /*
1111  * This timer was for timing out requests that haven't happened after
1112  * IDA_TIMEOUT.  That wasn't such a good idea.  This timer is used to
1113  * reset a flags structure so we don't flood the user with
1114  * "Non-Fatal error" messages.
1115  */
1116 static void ida_timer(unsigned long tdata)
1117 {
1118         ctlr_info_t *h = (ctlr_info_t*)tdata;
1119
1120         h->timer.expires = jiffies + IDA_TIMER;
1121         add_timer(&h->timer);
1122         h->misc_tflags = 0;
1123 }
1124
1125 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1126 {
1127         drv_info_t *drv = get_drv(bdev->bd_disk);
1128
1129         if (drv->cylinders) {
1130                 geo->heads = drv->heads;
1131                 geo->sectors = drv->sectors;
1132                 geo->cylinders = drv->cylinders;
1133         } else {
1134                 geo->heads = 0xff;
1135                 geo->sectors = 0x3f;
1136                 geo->cylinders = drv->nr_blks / (0xff*0x3f);
1137         }
1138
1139         return 0;
1140 }
1141
1142 /*
1143  *  ida_ioctl does some miscellaneous stuff like reporting drive geometry,
1144  *  setting readahead and submitting commands from userspace to the controller.
1145  */
1146 static int ida_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
1147 {
1148         drv_info_t *drv = get_drv(bdev->bd_disk);
1149         ctlr_info_t *host = get_host(bdev->bd_disk);
1150         int error;
1151         ida_ioctl_t __user *io = (ida_ioctl_t __user *)arg;
1152         ida_ioctl_t *my_io;
1153
1154         switch(cmd) {
1155         case IDAGETDRVINFO:
1156                 if (copy_to_user(&io->c.drv, drv, sizeof(drv_info_t)))
1157                         return -EFAULT;
1158                 return 0;
1159         case IDAPASSTHRU:
1160                 if (!capable(CAP_SYS_RAWIO))
1161                         return -EPERM;
1162                 my_io = kmalloc(sizeof(ida_ioctl_t), GFP_KERNEL);
1163                 if (!my_io)
1164                         return -ENOMEM;
1165                 error = -EFAULT;
1166                 if (copy_from_user(my_io, io, sizeof(*my_io)))
1167                         goto out_passthru;
1168                 error = ida_ctlr_ioctl(host, drv - host->drv, my_io);
1169                 if (error)
1170                         goto out_passthru;
1171                 error = -EFAULT;
1172                 if (copy_to_user(io, my_io, sizeof(*my_io)))
1173                         goto out_passthru;
1174                 error = 0;
1175 out_passthru:
1176                 kfree(my_io);
1177                 return error;
1178         case IDAGETCTLRSIG:
1179                 if (!arg) return -EINVAL;
1180                 if (put_user(host->ctlr_sig, (int __user *)arg))
1181                         return -EFAULT;
1182                 return 0;
1183         case IDAREVALIDATEVOLS:
1184                 if (MINOR(bdev->bd_dev) != 0)
1185                         return -ENXIO;
1186                 return revalidate_allvol(host);
1187         case IDADRIVERVERSION:
1188                 if (!arg) return -EINVAL;
1189                 if (put_user(DRIVER_VERSION, (unsigned long __user *)arg))
1190                         return -EFAULT;
1191                 return 0;
1192         case IDAGETPCIINFO:
1193         {
1194
1195                 ida_pci_info_struct pciinfo;
1196
1197                 if (!arg) return -EINVAL;
1198                 memset(&pciinfo, 0, sizeof(pciinfo));
1199                 pciinfo.bus = host->pci_dev->bus->number;
1200                 pciinfo.dev_fn = host->pci_dev->devfn;
1201                 pciinfo.board_id = host->board_id;
1202                 if(copy_to_user((void __user *) arg, &pciinfo,
1203                         sizeof( ida_pci_info_struct)))
1204                                 return -EFAULT;
1205                 return(0);
1206         }
1207
1208         default:
1209                 return -EINVAL;
1210         }
1211
1212 }
1213
1214 static int ida_ioctl(struct block_device *bdev, fmode_t mode,
1215                              unsigned int cmd, unsigned long param)
1216 {
1217         int ret;
1218
1219         mutex_lock(&cpqarray_mutex);
1220         ret = ida_locked_ioctl(bdev, mode, cmd, param);
1221         mutex_unlock(&cpqarray_mutex);
1222
1223         return ret;
1224 }
1225
1226 /*
1227  * ida_ctlr_ioctl is for passing commands to the controller from userspace.
1228  * The command block (io) has already been copied to kernel space for us,
1229  * however, any elements in the sglist need to be copied to kernel space
1230  * or copied back to userspace.
1231  *
1232  * Only root may perform a controller passthru command, however I'm not doing
1233  * any serious sanity checking on the arguments.  Doing an IDA_WRITE_MEDIA and
1234  * putting a 64M buffer in the sglist is probably a *bad* idea.
1235  */
1236 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
1237 {
1238         int ctlr = h->ctlr;
1239         cmdlist_t *c;
1240         void *p = NULL;
1241         unsigned long flags;
1242         int error;
1243
1244         if ((c = cmd_alloc(h, 0)) == NULL)
1245                 return -ENOMEM;
1246         c->ctlr = ctlr;
1247         c->hdr.unit = (io->unit & UNITVALID) ? (io->unit & ~UNITVALID) : dsk;
1248         c->hdr.size = sizeof(rblk_t) >> 2;
1249         c->size += sizeof(rblk_t);
1250
1251         c->req.hdr.cmd = io->cmd;
1252         c->req.hdr.blk = io->blk;
1253         c->req.hdr.blk_cnt = io->blk_cnt;
1254         c->type = CMD_IOCTL_PEND;
1255
1256         /* Pre submit processing */
1257         switch(io->cmd) {
1258         case PASSTHRU_A:
1259                 p = memdup_user(io->sg[0].addr, io->sg[0].size);
1260                 if (IS_ERR(p)) {
1261                         error = PTR_ERR(p);
1262                         cmd_free(h, c, 0);
1263                         return error;
1264                 }
1265                 c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c),
1266                                 sizeof(ida_ioctl_t),
1267                                 PCI_DMA_BIDIRECTIONAL);
1268                 c->req.sg[0].size = io->sg[0].size;
1269                 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1270                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1271                 c->req.hdr.sg_cnt = 1;
1272                 break;
1273         case IDA_READ:
1274         case READ_FLASH_ROM:
1275         case SENSE_CONTROLLER_PERFORMANCE:
1276                 p = kmalloc(io->sg[0].size, GFP_KERNEL);
1277                 if (!p)
1278                 {
1279                         error = -ENOMEM;
1280                         cmd_free(h, c, 0);
1281                         return(error);
1282                 }
1283
1284                 c->req.sg[0].size = io->sg[0].size;
1285                 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1286                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1287                 c->req.hdr.sg_cnt = 1;
1288                 break;
1289         case IDA_WRITE:
1290         case IDA_WRITE_MEDIA:
1291         case DIAG_PASS_THRU:
1292         case COLLECT_BUFFER:
1293         case WRITE_FLASH_ROM:
1294                 p = memdup_user(io->sg[0].addr, io->sg[0].size);
1295                 if (IS_ERR(p)) {
1296                         error = PTR_ERR(p);
1297                         cmd_free(h, c, 0);
1298                         return error;
1299                 }
1300                 c->req.sg[0].size = io->sg[0].size;
1301                 c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
1302                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1303                 c->req.hdr.sg_cnt = 1;
1304                 break;
1305         default:
1306                 c->req.sg[0].size = sizeof(io->c);
1307                 c->req.sg[0].addr = pci_map_single(h->pci_dev,&io->c,
1308                         c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1309                 c->req.hdr.sg_cnt = 1;
1310         }
1311
1312         /* Put the request on the tail of the request queue */
1313         spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1314         addQ(&h->reqQ, c);
1315         h->Qdepth++;
1316         start_io(h);
1317         spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1318
1319         /* Wait for completion */
1320         while(c->type != CMD_IOCTL_DONE)
1321                 schedule();
1322
1323         /* Unmap the DMA  */
1324         pci_unmap_single(h->pci_dev, c->req.sg[0].addr, c->req.sg[0].size,
1325                 PCI_DMA_BIDIRECTIONAL);
1326         /* Post submit processing */
1327         switch(io->cmd) {
1328         case PASSTHRU_A:
1329                 pci_unmap_single(h->pci_dev, c->req.hdr.blk,
1330                                 sizeof(ida_ioctl_t),
1331                                 PCI_DMA_BIDIRECTIONAL);
1332         case IDA_READ:
1333         case DIAG_PASS_THRU:
1334         case SENSE_CONTROLLER_PERFORMANCE:
1335         case READ_FLASH_ROM:
1336                 if (copy_to_user(io->sg[0].addr, p, io->sg[0].size)) {
1337                         kfree(p);
1338                         return -EFAULT;
1339                 }
1340                 /* fall through and free p */
1341         case IDA_WRITE:
1342         case IDA_WRITE_MEDIA:
1343         case COLLECT_BUFFER:
1344         case WRITE_FLASH_ROM:
1345                 kfree(p);
1346                 break;
1347         default:;
1348                 /* Nothing to do */
1349         }
1350
1351         io->rcode = c->req.hdr.rcode;
1352         cmd_free(h, c, 0);
1353         return(0);
1354 }
1355
1356 /*
1357  * Commands are pre-allocated in a large block.  Here we use a simple bitmap
1358  * scheme to suballocte them to the driver.  Operations that are not time
1359  * critical (and can wait for kmalloc and possibly sleep) can pass in NULL
1360  * as the first argument to get a new command.
1361  */
1362 static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool)
1363 {
1364         cmdlist_t * c;
1365         int i;
1366         dma_addr_t cmd_dhandle;
1367
1368         if (!get_from_pool) {
1369                 c = (cmdlist_t*)pci_alloc_consistent(h->pci_dev,
1370                         sizeof(cmdlist_t), &cmd_dhandle);
1371                 if(c==NULL)
1372                         return NULL;
1373         } else {
1374                 do {
1375                         i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
1376                         if (i == NR_CMDS)
1377                                 return NULL;
1378                 } while(test_and_set_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG)) != 0);
1379                 c = h->cmd_pool + i;
1380                 cmd_dhandle = h->cmd_pool_dhandle + i*sizeof(cmdlist_t);
1381                 h->nr_allocs++;
1382         }
1383
1384         memset(c, 0, sizeof(cmdlist_t));
1385         c->busaddr = cmd_dhandle;
1386         return c;
1387 }
1388
1389 static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool)
1390 {
1391         int i;
1392
1393         if (!got_from_pool) {
1394                 pci_free_consistent(h->pci_dev, sizeof(cmdlist_t), c,
1395                         c->busaddr);
1396         } else {
1397                 i = c - h->cmd_pool;
1398                 clear_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG));
1399                 h->nr_frees++;
1400         }
1401 }
1402
1403 /***********************************************************************
1404     name:        sendcmd
1405     Send a command to an IDA using the memory mapped FIFO interface
1406     and wait for it to complete.
1407     This routine should only be called at init time.
1408 ***********************************************************************/
1409 static int sendcmd(
1410         __u8    cmd,
1411         int     ctlr,
1412         void    *buff,
1413         size_t  size,
1414         unsigned int blk,
1415         unsigned int blkcnt,
1416         unsigned int log_unit )
1417 {
1418         cmdlist_t *c;
1419         int complete;
1420         unsigned long temp;
1421         unsigned long i;
1422         ctlr_info_t *info_p = hba[ctlr];
1423
1424         c = cmd_alloc(info_p, 1);
1425         if(!c)
1426                 return IO_ERROR;
1427         c->ctlr = ctlr;
1428         c->hdr.unit = log_unit;
1429         c->hdr.prio = 0;
1430         c->hdr.size = sizeof(rblk_t) >> 2;
1431         c->size += sizeof(rblk_t);
1432
1433         /* The request information. */
1434         c->req.hdr.next = 0;
1435         c->req.hdr.rcode = 0;
1436         c->req.bp = 0;
1437         c->req.hdr.sg_cnt = 1;
1438         c->req.hdr.reserved = 0;
1439
1440         if (size == 0)
1441                 c->req.sg[0].size = 512;
1442         else
1443                 c->req.sg[0].size = size;
1444
1445         c->req.hdr.blk = blk;
1446         c->req.hdr.blk_cnt = blkcnt;
1447         c->req.hdr.cmd = (unsigned char) cmd;
1448         c->req.sg[0].addr = (__u32) pci_map_single(info_p->pci_dev,
1449                 buff, c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1450         /*
1451          * Disable interrupt
1452          */
1453         info_p->access.set_intr_mask(info_p, 0);
1454         /* Make sure there is room in the command FIFO */
1455         /* Actually it should be completely empty at this time. */
1456         for (i = 200000; i > 0; i--) {
1457                 temp = info_p->access.fifo_full(info_p);
1458                 if (temp != 0) {
1459                         break;
1460                 }
1461                 udelay(10);
1462 DBG(
1463                 printk(KERN_WARNING "cpqarray ida%d: idaSendPciCmd FIFO full,"
1464                         " waiting!\n", ctlr);
1465 );
1466         }
1467         /*
1468          * Send the cmd
1469          */
1470         info_p->access.submit_command(info_p, c);
1471         complete = pollcomplete(ctlr);
1472
1473         pci_unmap_single(info_p->pci_dev, (dma_addr_t) c->req.sg[0].addr,
1474                 c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
1475         if (complete != 1) {
1476                 if (complete != c->busaddr) {
1477                         printk( KERN_WARNING
1478                         "cpqarray ida%d: idaSendPciCmd "
1479                       "Invalid command list address returned! (%08lx)\n",
1480                                 ctlr, (unsigned long)complete);
1481                         cmd_free(info_p, c, 1);
1482                         return (IO_ERROR);
1483                 }
1484         } else {
1485                 printk( KERN_WARNING
1486                         "cpqarray ida%d: idaSendPciCmd Timeout out, "
1487                         "No command list address returned!\n",
1488                         ctlr);
1489                 cmd_free(info_p, c, 1);
1490                 return (IO_ERROR);
1491         }
1492
1493         if (c->req.hdr.rcode & 0x00FE) {
1494                 if (!(c->req.hdr.rcode & BIG_PROBLEM)) {
1495                         printk( KERN_WARNING
1496                         "cpqarray ida%d: idaSendPciCmd, error: "
1497                                 "Controller failed at init time "
1498                                 "cmd: 0x%x, return code = 0x%x\n",
1499                                 ctlr, c->req.hdr.cmd, c->req.hdr.rcode);
1500
1501                         cmd_free(info_p, c, 1);
1502                         return (IO_ERROR);
1503                 }
1504         }
1505         cmd_free(info_p, c, 1);
1506         return (IO_OK);
1507 }
1508
1509 /*
1510  * revalidate_allvol is for online array config utilities.  After a
1511  * utility reconfigures the drives in the array, it can use this function
1512  * (through an ioctl) to make the driver zap any previous disk structs for
1513  * that controller and get new ones.
1514  *
1515  * Right now I'm using the getgeometry() function to do this, but this
1516  * function should probably be finer grained and allow you to revalidate one
1517  * particualar logical volume (instead of all of them on a particular
1518  * controller).
1519  */
1520 static int revalidate_allvol(ctlr_info_t *host)
1521 {
1522         int ctlr = host->ctlr;
1523         int i;
1524         unsigned long flags;
1525
1526         spin_lock_irqsave(IDA_LOCK(ctlr), flags);
1527         if (host->usage_count > 1) {
1528                 spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1529                 printk(KERN_WARNING "cpqarray: Device busy for volume"
1530                         " revalidation (usage=%d)\n", host->usage_count);
1531                 return -EBUSY;
1532         }
1533         host->usage_count++;
1534         spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
1535
1536         /*
1537          * Set the partition and block size structures for all volumes
1538          * on this controller to zero.  We will reread all of this data
1539          */
1540         set_capacity(ida_gendisk[ctlr][0], 0);
1541         for (i = 1; i < NWD; i++) {
1542                 struct gendisk *disk = ida_gendisk[ctlr][i];
1543                 if (disk->flags & GENHD_FL_UP)
1544                         del_gendisk(disk);
1545         }
1546         memset(host->drv, 0, sizeof(drv_info_t)*NWD);
1547
1548         /*
1549          * Tell the array controller not to give us any interrupts while
1550          * we check the new geometry.  Then turn interrupts back on when
1551          * we're done.
1552          */
1553         host->access.set_intr_mask(host, 0);
1554         getgeometry(ctlr);
1555         host->access.set_intr_mask(host, FIFO_NOT_EMPTY);
1556
1557         for(i=0; i<NWD; i++) {
1558                 struct gendisk *disk = ida_gendisk[ctlr][i];
1559                 drv_info_t *drv = &host->drv[i];
1560                 if (i && !drv->nr_blks)
1561                         continue;
1562                 blk_queue_logical_block_size(host->queue, drv->blk_size);
1563                 set_capacity(disk, drv->nr_blks);
1564                 disk->queue = host->queue;
1565                 disk->private_data = drv;
1566                 if (i)
1567                         add_disk(disk);
1568         }
1569
1570         host->usage_count--;
1571         return 0;
1572 }
1573
1574 static int ida_revalidate(struct gendisk *disk)
1575 {
1576         drv_info_t *drv = disk->private_data;
1577         set_capacity(disk, drv->nr_blks);
1578         return 0;
1579 }
1580
1581 /********************************************************************
1582     name: pollcomplete
1583     Wait polling for a command to complete.
1584     The memory mapped FIFO is polled for the completion.
1585     Used only at init time, interrupts disabled.
1586  ********************************************************************/
1587 static int pollcomplete(int ctlr)
1588 {
1589         int done;
1590         int i;
1591
1592         /* Wait (up to 2 seconds) for a command to complete */
1593
1594         for (i = 200000; i > 0; i--) {
1595                 done = hba[ctlr]->access.command_completed(hba[ctlr]);
1596                 if (done == 0) {
1597                         udelay(10);     /* a short fixed delay */
1598                 } else
1599                         return (done);
1600         }
1601         /* Invalid address to tell caller we ran out of time */
1602         return 1;
1603 }
1604 /*****************************************************************
1605     start_fwbk
1606     Starts controller firmwares background processing.
1607     Currently only the Integrated Raid controller needs this done.
1608     If the PCI mem address registers are written to after this,
1609          data corruption may occur
1610 *****************************************************************/
1611 static void start_fwbk(int ctlr)
1612 {
1613                 id_ctlr_t *id_ctlr_buf;
1614         int ret_code;
1615
1616         if(     (hba[ctlr]->board_id != 0x40400E11)
1617                 && (hba[ctlr]->board_id != 0x40480E11) )
1618
1619         /* Not a Integrated Raid, so there is nothing for us to do */
1620                 return;
1621         printk(KERN_DEBUG "cpqarray: Starting firmware's background"
1622                 " processing\n");
1623         /* Command does not return anything, but idasend command needs a
1624                 buffer */
1625         id_ctlr_buf = kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1626         if(id_ctlr_buf==NULL)
1627         {
1628                 printk(KERN_WARNING "cpqarray: Out of memory. "
1629                         "Unable to start background processing.\n");
1630                 return;
1631         }
1632         ret_code = sendcmd(RESUME_BACKGROUND_ACTIVITY, ctlr,
1633                 id_ctlr_buf, 0, 0, 0, 0);
1634         if(ret_code != IO_OK)
1635                 printk(KERN_WARNING "cpqarray: Unable to start"
1636                         " background processing\n");
1637
1638         kfree(id_ctlr_buf);
1639 }
1640 /*****************************************************************
1641     getgeometry
1642     Get ida logical volume geometry from the controller
1643     This is a large bit of code which once existed in two flavors,
1644     It is used only at init time.
1645 *****************************************************************/
1646 static void getgeometry(int ctlr)
1647 {
1648         id_log_drv_t *id_ldrive;
1649         id_ctlr_t *id_ctlr_buf;
1650         sense_log_drv_stat_t *id_lstatus_buf;
1651         config_t *sense_config_buf;
1652         unsigned int log_unit, log_index;
1653         int ret_code, size;
1654         drv_info_t *drv;
1655         ctlr_info_t *info_p = hba[ctlr];
1656         int i;
1657
1658         info_p->log_drv_map = 0;
1659
1660         id_ldrive = kzalloc(sizeof(id_log_drv_t), GFP_KERNEL);
1661         if (!id_ldrive) {
1662                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1663                 goto err_0;
1664         }
1665
1666         id_ctlr_buf = kzalloc(sizeof(id_ctlr_t), GFP_KERNEL);
1667         if (!id_ctlr_buf) {
1668                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1669                 goto err_1;
1670         }
1671
1672         id_lstatus_buf = kzalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
1673         if (!id_lstatus_buf) {
1674                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1675                 goto err_2;
1676         }
1677
1678         sense_config_buf = kzalloc(sizeof(config_t), GFP_KERNEL);
1679         if (!sense_config_buf) {
1680                 printk( KERN_ERR "cpqarray:  out of memory.\n");
1681                 goto err_3;
1682         }
1683
1684         info_p->phys_drives = 0;
1685         info_p->log_drv_map = 0;
1686         info_p->drv_assign_map = 0;
1687         info_p->drv_spare_map = 0;
1688         info_p->mp_failed_drv_map = 0;  /* only initialized here */
1689         /* Get controllers info for this logical drive */
1690         ret_code = sendcmd(ID_CTLR, ctlr, id_ctlr_buf, 0, 0, 0, 0);
1691         if (ret_code == IO_ERROR) {
1692                 /*
1693                  * If can't get controller info, set the logical drive map to 0,
1694                  * so the idastubopen will fail on all logical drives
1695                  * on the controller.
1696                  */
1697                 printk(KERN_ERR "cpqarray: error sending ID controller\n");
1698                 goto err_4;
1699         }
1700
1701         info_p->log_drives = id_ctlr_buf->nr_drvs;
1702         for(i=0;i<4;i++)
1703                 info_p->firm_rev[i] = id_ctlr_buf->firm_rev[i];
1704         info_p->ctlr_sig = id_ctlr_buf->cfg_sig;
1705
1706         printk(" (%s)\n", info_p->product_name);
1707         /*
1708          * Initialize logical drive map to zero
1709          */
1710         log_index = 0;
1711         /*
1712          * Get drive geometry for all logical drives
1713          */
1714         if (id_ctlr_buf->nr_drvs > 16)
1715                 printk(KERN_WARNING "cpqarray ida%d:  This driver supports "
1716                         "16 logical drives per controller.\n.  "
1717                         " Additional drives will not be "
1718                         "detected\n", ctlr);
1719
1720         for (log_unit = 0;
1721              (log_index < id_ctlr_buf->nr_drvs)
1722              && (log_unit < NWD);
1723              log_unit++) {
1724                 size = sizeof(sense_log_drv_stat_t);
1725
1726                 /*
1727                    Send "Identify logical drive status" cmd
1728                  */
1729                 ret_code = sendcmd(SENSE_LOG_DRV_STAT,
1730                              ctlr, id_lstatus_buf, size, 0, 0, log_unit);
1731                 if (ret_code == IO_ERROR) {
1732                         /*
1733                            If can't get logical drive status, set
1734                            the logical drive map to 0, so the
1735                            idastubopen will fail for all logical drives
1736                            on the controller.
1737                          */
1738                         info_p->log_drv_map = 0;
1739                         printk( KERN_WARNING
1740                              "cpqarray ida%d: idaGetGeometry - Controller"
1741                                 " failed to report status of logical drive %d\n"
1742                          "Access to this controller has been disabled\n",
1743                                 ctlr, log_unit);
1744                         goto err_4;
1745                 }
1746                 /*
1747                    Make sure the logical drive is configured
1748                  */
1749                 if (id_lstatus_buf->status != LOG_NOT_CONF) {
1750                         ret_code = sendcmd(ID_LOG_DRV, ctlr, id_ldrive,
1751                                sizeof(id_log_drv_t), 0, 0, log_unit);
1752                         /*
1753                            If error, the bit for this
1754                            logical drive won't be set and
1755                            idastubopen will return error.
1756                          */
1757                         if (ret_code != IO_ERROR) {
1758                                 drv = &info_p->drv[log_unit];
1759                                 drv->blk_size = id_ldrive->blk_size;
1760                                 drv->nr_blks = id_ldrive->nr_blks;
1761                                 drv->cylinders = id_ldrive->drv.cyl;
1762                                 drv->heads = id_ldrive->drv.heads;
1763                                 drv->sectors = id_ldrive->drv.sect_per_track;
1764                                 info_p->log_drv_map |=  (1 << log_unit);
1765
1766         printk(KERN_INFO "cpqarray ida/c%dd%d: blksz=%d nr_blks=%d\n",
1767                 ctlr, log_unit, drv->blk_size, drv->nr_blks);
1768                                 ret_code = sendcmd(SENSE_CONFIG,
1769                                                   ctlr, sense_config_buf,
1770                                  sizeof(config_t), 0, 0, log_unit);
1771                                 if (ret_code == IO_ERROR) {
1772                                         info_p->log_drv_map = 0;
1773                                         printk(KERN_ERR "cpqarray: error sending sense config\n");
1774                                         goto err_4;
1775                                 }
1776
1777                                 info_p->phys_drives =
1778                                     sense_config_buf->ctlr_phys_drv;
1779                                 info_p->drv_assign_map
1780                                     |= sense_config_buf->drv_asgn_map;
1781                                 info_p->drv_assign_map
1782                                     |= sense_config_buf->spare_asgn_map;
1783                                 info_p->drv_spare_map
1784                                     |= sense_config_buf->spare_asgn_map;
1785                         }       /* end of if no error on id_ldrive */
1786                         log_index = log_index + 1;
1787                 }               /* end of if logical drive configured */
1788         }                       /* end of for log_unit */
1789
1790         /* Free all the buffers and return */
1791 err_4:
1792         kfree(sense_config_buf);
1793 err_3:
1794         kfree(id_lstatus_buf);
1795 err_2:
1796         kfree(id_ctlr_buf);
1797 err_1:
1798         kfree(id_ldrive);
1799 err_0:
1800         return;
1801 }
1802
1803 static void __exit cpqarray_exit(void)
1804 {
1805         int i;
1806
1807         pci_unregister_driver(&cpqarray_pci_driver);
1808
1809         /* Double check that all controller entries have been removed */
1810         for(i=0; i<MAX_CTLR; i++) {
1811                 if (hba[i] != NULL) {
1812                         printk(KERN_WARNING "cpqarray: Removing EISA "
1813                                         "controller %d\n", i);
1814                         cpqarray_remove_one_eisa(i);
1815                 }
1816         }
1817
1818         remove_proc_entry("driver/cpqarray", NULL);
1819 }
1820
1821 module_init(cpqarray_init)
1822 module_exit(cpqarray_exit)