drivers/char/mbcs.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
   7  */
   8
   9 /*
  10  *      MOATB Core Services driver.
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/types.h>
  18 #include <linux/ioport.h>
  19 #include <linux/notifier.h>
  20 #include <linux/reboot.h>
  21 #include <linux/init.h>
  22 #include <linux/fs.h>
  23 #include <linux/delay.h>
  24 #include <linux/device.h>
  25 #include <linux/mm.h>
  26 #include <linux/uio.h>
  27 #include <asm/io.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/system.h>
  30 #include <asm/pgtable.h>
  31 #include <asm/sn/addrs.h>
  32 #include <asm/sn/intr.h>
  33 #include <asm/sn/tiocx.h>
  34 #include "mbcs.h"
  35
  36 #define MBCS_DEBUG 0
  37 #if MBCS_DEBUG
  38 #define DBG(fmt...)    printk(KERN_ALERT fmt)
  39 #else
  40 #define DBG(fmt...)
  41 #endif
  42 int mbcs_major;
  43
  44 LIST_HEAD(soft_list);
  45
  46 /*
  47  * file operations
  48  */
  49 struct file_operations mbcs_ops = {
  50         .open = mbcs_open,
  51         .llseek = mbcs_sram_llseek,
  52         .read = mbcs_sram_read,
  53         .write = mbcs_sram_write,
  54         .mmap = mbcs_gscr_mmap,
  55 };
  56
  57 struct mbcs_callback_arg {
  58         int minor;
  59         struct cx_dev *cx_dev;
  60 };
  61
  62 static inline void mbcs_getdma_init(struct getdma *gdma)
  63 {
  64         memset(gdma, 0, sizeof(struct getdma));
  65         gdma->DoneIntEnable = 1;
  66 }
  67
  68 static inline void mbcs_putdma_init(struct putdma *pdma)
  69 {
  70         memset(pdma, 0, sizeof(struct putdma));
  71         pdma->DoneIntEnable = 1;
  72 }
  73
  74 static inline void mbcs_algo_init(struct algoblock *algo_soft)
  75 {
  76         memset(algo_soft, 0, sizeof(struct algoblock));
  77 }
  78
  79 static inline void mbcs_getdma_set(void *mmr,
  80                        uint64_t hostAddr,
  81                        uint64_t localAddr,
  82                        uint64_t localRamSel,
  83                        uint64_t numPkts,
  84                        uint64_t amoEnable,
  85                        uint64_t intrEnable,
  86                        uint64_t peerIO,
  87                        uint64_t amoHostDest,
  88                        uint64_t amoModType, uint64_t intrHostDest,
  89                        uint64_t intrVector)
  90 {
  91         union dma_control rdma_control;
  92         union dma_amo_dest amo_dest;
  93         union intr_dest intr_dest;
  94         union dma_localaddr local_addr;
  95         union dma_hostaddr host_addr;
  96
  97         rdma_control.dma_control_reg = 0;
  98         amo_dest.dma_amo_dest_reg = 0;
  99         intr_dest.intr_dest_reg = 0;
 100         local_addr.dma_localaddr_reg = 0;
 101         host_addr.dma_hostaddr_reg = 0;
 102
 103         host_addr.dma_sys_addr = hostAddr;
 104         MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
 105
 106         local_addr.dma_ram_addr = localAddr;
 107         local_addr.dma_ram_sel = localRamSel;
 108         MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
 109
 110         rdma_control.dma_op_length = numPkts;
 111         rdma_control.done_amo_en = amoEnable;
 112         rdma_control.done_int_en = intrEnable;
 113         rdma_control.pio_mem_n = peerIO;
 114         MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg);
 115
 116         amo_dest.dma_amo_sys_addr = amoHostDest;
 117         amo_dest.dma_amo_mod_type = amoModType;
 118         MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
 119
 120         intr_dest.address = intrHostDest;
 121         intr_dest.int_vector = intrVector;
 122         MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg);
 123
 124 }
 125
 126 static inline void mbcs_putdma_set(void *mmr,
 127                        uint64_t hostAddr,
 128                        uint64_t localAddr,
 129                        uint64_t localRamSel,
 130                        uint64_t numPkts,
 131                        uint64_t amoEnable,
 132                        uint64_t intrEnable,
 133                        uint64_t peerIO,
 134                        uint64_t amoHostDest,
 135                        uint64_t amoModType,
 136                        uint64_t intrHostDest, uint64_t intrVector)
 137 {
 138         union dma_control wdma_control;
 139         union dma_amo_dest amo_dest;
 140         union intr_dest intr_dest;
 141         union dma_localaddr local_addr;
 142         union dma_hostaddr host_addr;
 143
 144         wdma_control.dma_control_reg = 0;
 145         amo_dest.dma_amo_dest_reg = 0;
 146         intr_dest.intr_dest_reg = 0;
 147         local_addr.dma_localaddr_reg = 0;
 148         host_addr.dma_hostaddr_reg = 0;
 149
 150         host_addr.dma_sys_addr = hostAddr;
 151         MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
 152
 153         local_addr.dma_ram_addr = localAddr;
 154         local_addr.dma_ram_sel = localRamSel;
 155         MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
 156
 157         wdma_control.dma_op_length = numPkts;
 158         wdma_control.done_amo_en = amoEnable;
 159         wdma_control.done_int_en = intrEnable;
 160         wdma_control.pio_mem_n = peerIO;
 161         MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg);
 162
 163         amo_dest.dma_amo_sys_addr = amoHostDest;
 164         amo_dest.dma_amo_mod_type = amoModType;
 165         MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
 166
 167         intr_dest.address = intrHostDest;
 168         intr_dest.int_vector = intrVector;
 169         MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg);
 170
 171 }
 172
 173 static inline void mbcs_algo_set(void *mmr,
 174                      uint64_t amoHostDest,
 175                      uint64_t amoModType,
 176                      uint64_t intrHostDest,
 177                      uint64_t intrVector, uint64_t algoStepCount)
 178 {
 179         union dma_amo_dest amo_dest;
 180         union intr_dest intr_dest;
 181         union algo_step step;
 182
 183         step.algo_step_reg = 0;
 184         intr_dest.intr_dest_reg = 0;
 185         amo_dest.dma_amo_dest_reg = 0;
 186
 187         amo_dest.dma_amo_sys_addr = amoHostDest;
 188         amo_dest.dma_amo_mod_type = amoModType;
 189         MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg);
 190
 191         intr_dest.address = intrHostDest;
 192         intr_dest.int_vector = intrVector;
 193         MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg);
 194
 195         step.alg_step_cnt = algoStepCount;
 196         MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg);
 197 }
 198
 199 static inline int mbcs_getdma_start(struct mbcs_soft *soft)
 200 {
 201         void *mmr_base;
 202         struct getdma *gdma;
 203         uint64_t numPkts;
 204         union cm_control cm_control;
 205
 206         mmr_base = soft->mmr_base;
 207         gdma = &soft->getdma;
 208
 209         /* check that host address got setup */
 210         if (!gdma->hostAddr)
 211                 return -1;
 212
 213         numPkts =
 214             (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
 215
 216         /* program engine */
 217         mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr),
 218                    gdma->localAddr,
 219                    (gdma->localAddr < MB2) ? 0 :
 220                    (gdma->localAddr < MB4) ? 1 :
 221                    (gdma->localAddr < MB6) ? 2 : 3,
 222                    numPkts,
 223                    gdma->DoneAmoEnable,
 224                    gdma->DoneIntEnable,
 225                    gdma->peerIO,
 226                    gdma->amoHostDest,
 227                    gdma->amoModType,
 228                    gdma->intrHostDest, gdma->intrVector);
 229
 230         /* start engine */
 231         cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 232         cm_control.rd_dma_go = 1;
 233         MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
 234
 235         return 0;
 236
 237 }
 238
 239 static inline int mbcs_putdma_start(struct mbcs_soft *soft)
 240 {
 241         void *mmr_base;
 242         struct putdma *pdma;
 243         uint64_t numPkts;
 244         union cm_control cm_control;
 245
 246         mmr_base = soft->mmr_base;
 247         pdma = &soft->putdma;
 248
 249         /* check that host address got setup */
 250         if (!pdma->hostAddr)
 251                 return -1;
 252
 253         numPkts =
 254             (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
 255
 256         /* program engine */
 257         mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr),
 258                    pdma->localAddr,
 259                    (pdma->localAddr < MB2) ? 0 :
 260                    (pdma->localAddr < MB4) ? 1 :
 261                    (pdma->localAddr < MB6) ? 2 : 3,
 262                    numPkts,
 263                    pdma->DoneAmoEnable,
 264                    pdma->DoneIntEnable,
 265                    pdma->peerIO,
 266                    pdma->amoHostDest,
 267                    pdma->amoModType,
 268                    pdma->intrHostDest, pdma->intrVector);
 269
 270         /* start engine */
 271         cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 272         cm_control.wr_dma_go = 1;
 273         MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
 274
 275         return 0;
 276
 277 }
 278
 279 static inline int mbcs_algo_start(struct mbcs_soft *soft)
 280 {
 281         struct algoblock *algo_soft = &soft->algo;
 282         void *mmr_base = soft->mmr_base;
 283         union cm_control cm_control;
 284
 285         if (down_interruptible(&soft->algolock))
 286                 return -ERESTARTSYS;
 287
 288         atomic_set(&soft->algo_done, 0);
 289
 290         mbcs_algo_set(mmr_base,
 291                  algo_soft->amoHostDest,
 292                  algo_soft->amoModType,
 293                  algo_soft->intrHostDest,
 294                  algo_soft->intrVector, algo_soft->algoStepCount);
 295
 296         /* start algorithm */
 297         cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 298         cm_control.alg_done_int_en = 1;
 299         cm_control.alg_go = 1;
 300         MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
 301
 302         up(&soft->algolock);
 303
 304         return 0;
 305 }
 306
 307 static inline ssize_t
 308 do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr,
 309                       size_t len, loff_t * off)
 310 {
 311         int rv = 0;
 312
 313         if (down_interruptible(&soft->dmawritelock))
 314                 return -ERESTARTSYS;
 315
 316         atomic_set(&soft->dmawrite_done, 0);
 317
 318         soft->putdma.hostAddr = hostAddr;
 319         soft->putdma.localAddr = *off;
 320         soft->putdma.bytes = len;
 321
 322         if (mbcs_putdma_start(soft) < 0) {
 323                 DBG(KERN_ALERT "do_mbcs_sram_dmawrite: "
 324                                         "mbcs_putdma_start failed\n");
 325                 rv = -EAGAIN;
 326                 goto dmawrite_exit;
 327         }
 328
 329         if (wait_event_interruptible(soft->dmawrite_queue,
 330                                         atomic_read(&soft->dmawrite_done))) {
 331                 rv = -ERESTARTSYS;
 332                 goto dmawrite_exit;
 333         }
 334
 335         rv = len;
 336         *off += len;
 337
 338 dmawrite_exit:
 339         up(&soft->dmawritelock);
 340
 341         return rv;
 342 }
 343
 344 static inline ssize_t
 345 do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr,
 346                      size_t len, loff_t * off)
 347 {
 348         int rv = 0;
 349
 350         if (down_interruptible(&soft->dmareadlock))
 351                 return -ERESTARTSYS;
 352
 353         atomic_set(&soft->dmawrite_done, 0);
 354
 355         soft->getdma.hostAddr = hostAddr;
 356         soft->getdma.localAddr = *off;
 357         soft->getdma.bytes = len;
 358
 359         if (mbcs_getdma_start(soft) < 0) {
 360                 DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n");
 361                 rv = -EAGAIN;
 362                 goto dmaread_exit;
 363         }
 364
 365         if (wait_event_interruptible(soft->dmaread_queue,
 366                                         atomic_read(&soft->dmaread_done))) {
 367                 rv = -ERESTARTSYS;
 368                 goto dmaread_exit;
 369         }
 370
 371         rv = len;
 372         *off += len;
 373
 374 dmaread_exit:
 375         up(&soft->dmareadlock);
 376
 377         return rv;
 378 }
 379
 380 int mbcs_open(struct inode *ip, struct file *fp)
 381 {
 382         struct mbcs_soft *soft;
 383         int minor;
 384
 385         minor = iminor(ip);
 386
 387         list_for_each_entry(soft, &soft_list, list) {
 388                 if (soft->nasid == minor) {
 389                         fp->private_data = soft->cxdev;
 390                         return 0;
 391                 }
 392         }
 393
 394         return -ENODEV;
 395 }
 396
 397 ssize_t mbcs_sram_read(struct file * fp, char __user *buf, size_t len, loff_t * off)
 398 {
 399         struct cx_dev *cx_dev = fp->private_data;
 400         struct mbcs_soft *soft = cx_dev->soft;
 401         uint64_t hostAddr;
 402         int rv = 0;
 403
 404         hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
 405         if (hostAddr == 0)
 406                 return -ENOMEM;
 407
 408         rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off);
 409         if (rv < 0)
 410                 goto exit;
 411
 412         if (copy_to_user(buf, (void *)hostAddr, len))
 413                 rv = -EFAULT;
 414
 415       exit:
 416         free_pages(hostAddr, get_order(len));
 417
 418         return rv;
 419 }
 420
 421 ssize_t
 422 mbcs_sram_write(struct file * fp, const char __user *buf, size_t len, loff_t * off)
 423 {
 424         struct cx_dev *cx_dev = fp->private_data;
 425         struct mbcs_soft *soft = cx_dev->soft;
 426         uint64_t hostAddr;
 427         int rv = 0;
 428
 429         hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
 430         if (hostAddr == 0)
 431                 return -ENOMEM;
 432
 433         if (copy_from_user((void *)hostAddr, buf, len)) {
 434                 rv = -EFAULT;
 435                 goto exit;
 436         }
 437
 438         rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off);
 439
 440       exit:
 441         free_pages(hostAddr, get_order(len));
 442
 443         return rv;
 444 }
 445
 446 loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence)
 447 {
 448         loff_t newpos;
 449
 450         switch (whence) {
 451         case 0:         /* SEEK_SET */
 452                 newpos = off;
 453                 break;
 454
 455         case 1:         /* SEEK_CUR */
 456                 newpos = filp->f_pos + off;
 457                 break;
 458
 459         case 2:         /* SEEK_END */
 460                 newpos = MBCS_SRAM_SIZE + off;
 461                 break;
 462
 463         default:                /* can't happen */
 464                 return -EINVAL;
 465         }
 466
 467         if (newpos < 0)
 468                 return -EINVAL;
 469
 470         filp->f_pos = newpos;
 471
 472         return newpos;
 473 }
 474
 475 static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset)
 476 {
 477         uint64_t mmr_base;
 478
 479         mmr_base = (uint64_t) (soft->mmr_base + offset);
 480
 481         return mmr_base;
 482 }
 483
 484 static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft)
 485 {
 486         soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START);
 487 }
 488
 489 static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft)
 490 {
 491         soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START);
 492 }
 493
 494 int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma)
 495 {
 496         struct cx_dev *cx_dev = fp->private_data;
 497         struct mbcs_soft *soft = cx_dev->soft;
 498
 499         if (vma->vm_pgoff != 0)
 500                 return -EINVAL;
 501
 502         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 503
 504         /* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
 505         if (remap_pfn_range(vma,
 506                             vma->vm_start,
 507                             __pa(soft->gscr_addr) >> PAGE_SHIFT,
 508                             PAGE_SIZE,
 509                             vma->vm_page_prot))
 510                 return -EAGAIN;
 511
 512         return 0;
 513 }
 514
 515 /**
 516  * mbcs_completion_intr_handler - Primary completion handler.
 517  * @irq: irq
 518  * @arg: soft struct for device
 519  * @ep: regs
 520  *
 521  */
 522 static irqreturn_t
 523 mbcs_completion_intr_handler(int irq, void *arg, struct pt_regs *ep)
 524 {
 525         struct mbcs_soft *soft = (struct mbcs_soft *)arg;
 526         void *mmr_base;
 527         union cm_status cm_status;
 528         union cm_control cm_control;
 529
 530         mmr_base = soft->mmr_base;
 531         cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS);
 532
 533         if (cm_status.rd_dma_done) {
 534                 /* stop dma-read engine, clear status */
 535                 cm_control.cm_control_reg =
 536                     MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 537                 cm_control.rd_dma_clr = 1;
 538                 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
 539                              cm_control.cm_control_reg);
 540                 atomic_set(&soft->dmaread_done, 1);
 541                 wake_up(&soft->dmaread_queue);
 542         }
 543         if (cm_status.wr_dma_done) {
 544                 /* stop dma-write engine, clear status */
 545                 cm_control.cm_control_reg =
 546                     MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 547                 cm_control.wr_dma_clr = 1;
 548                 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
 549                              cm_control.cm_control_reg);
 550                 atomic_set(&soft->dmawrite_done, 1);
 551                 wake_up(&soft->dmawrite_queue);
 552         }
 553         if (cm_status.alg_done) {
 554                 /* clear status */
 555                 cm_control.cm_control_reg =
 556                     MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 557                 cm_control.alg_done_clr = 1;
 558                 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
 559                              cm_control.cm_control_reg);
 560                 atomic_set(&soft->algo_done, 1);
 561                 wake_up(&soft->algo_queue);
 562         }
 563
 564         return IRQ_HANDLED;
 565 }
 566
 567 /**
 568  * mbcs_intr_alloc - Allocate interrupts.
 569  * @dev: device pointer
 570  *
 571  */
 572 static int mbcs_intr_alloc(struct cx_dev *dev)
 573 {
 574         struct sn_irq_info *sn_irq;
 575         struct mbcs_soft *soft;
 576         struct getdma *getdma;
 577         struct putdma *putdma;
 578         struct algoblock *algo;
 579
 580         soft = dev->soft;
 581         getdma = &soft->getdma;
 582         putdma = &soft->putdma;
 583         algo = &soft->algo;
 584
 585         soft->get_sn_irq = NULL;
 586         soft->put_sn_irq = NULL;
 587         soft->algo_sn_irq = NULL;
 588
 589         sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
 590         if (sn_irq == NULL)
 591                 return -EAGAIN;
 592         soft->get_sn_irq = sn_irq;
 593         getdma->intrHostDest = sn_irq->irq_xtalkaddr;
 594         getdma->intrVector = sn_irq->irq_irq;
 595         if (request_irq(sn_irq->irq_irq,
 596                         (void *)mbcs_completion_intr_handler, SA_SHIRQ,
 597                         "MBCS get intr", (void *)soft)) {
 598                 tiocx_irq_free(soft->get_sn_irq);
 599                 return -EAGAIN;
 600         }
 601
 602         sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
 603         if (sn_irq == NULL) {
 604                 free_irq(soft->get_sn_irq->irq_irq, soft);
 605                 tiocx_irq_free(soft->get_sn_irq);
 606                 return -EAGAIN;
 607         }
 608         soft->put_sn_irq = sn_irq;
 609         putdma->intrHostDest = sn_irq->irq_xtalkaddr;
 610         putdma->intrVector = sn_irq->irq_irq;
 611         if (request_irq(sn_irq->irq_irq,
 612                         (void *)mbcs_completion_intr_handler, SA_SHIRQ,
 613                         "MBCS put intr", (void *)soft)) {
 614                 tiocx_irq_free(soft->put_sn_irq);
 615                 free_irq(soft->get_sn_irq->irq_irq, soft);
 616                 tiocx_irq_free(soft->get_sn_irq);
 617                 return -EAGAIN;
 618         }
 619
 620         sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
 621         if (sn_irq == NULL) {
 622                 free_irq(soft->put_sn_irq->irq_irq, soft);
 623                 tiocx_irq_free(soft->put_sn_irq);
 624                 free_irq(soft->get_sn_irq->irq_irq, soft);
 625                 tiocx_irq_free(soft->get_sn_irq);
 626                 return -EAGAIN;
 627         }
 628         soft->algo_sn_irq = sn_irq;
 629         algo->intrHostDest = sn_irq->irq_xtalkaddr;
 630         algo->intrVector = sn_irq->irq_irq;
 631         if (request_irq(sn_irq->irq_irq,
 632                         (void *)mbcs_completion_intr_handler, SA_SHIRQ,
 633                         "MBCS algo intr", (void *)soft)) {
 634                 tiocx_irq_free(soft->algo_sn_irq);
 635                 free_irq(soft->put_sn_irq->irq_irq, soft);
 636                 tiocx_irq_free(soft->put_sn_irq);
 637                 free_irq(soft->get_sn_irq->irq_irq, soft);
 638                 tiocx_irq_free(soft->get_sn_irq);
 639                 return -EAGAIN;
 640         }
 641
 642         return 0;
 643 }
 644
 645 /**
 646  * mbcs_intr_dealloc - Remove interrupts.
 647  * @dev: device pointer
 648  *
 649  */
 650 static void mbcs_intr_dealloc(struct cx_dev *dev)
 651 {
 652         struct mbcs_soft *soft;
 653
 654         soft = dev->soft;
 655
 656         free_irq(soft->get_sn_irq->irq_irq, soft);
 657         tiocx_irq_free(soft->get_sn_irq);
 658         free_irq(soft->put_sn_irq->irq_irq, soft);
 659         tiocx_irq_free(soft->put_sn_irq);
 660         free_irq(soft->algo_sn_irq->irq_irq, soft);
 661         tiocx_irq_free(soft->algo_sn_irq);
 662 }
 663
 664 static inline int mbcs_hw_init(struct mbcs_soft *soft)
 665 {
 666         void *mmr_base = soft->mmr_base;
 667         union cm_control cm_control;
 668         union cm_req_timeout cm_req_timeout;
 669         uint64_t err_stat;
 670
 671         cm_req_timeout.cm_req_timeout_reg =
 672             MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT);
 673
 674         cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK;
 675         MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT,
 676                      cm_req_timeout.cm_req_timeout_reg);
 677
 678         mbcs_gscr_pioaddr_set(soft);
 679         mbcs_debug_pioaddr_set(soft);
 680
 681         /* clear errors */
 682         err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT);
 683         MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat);
 684         MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1);
 685
 686         /* enable interrupts */
 687         /* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */
 688         MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL);
 689
 690         /* arm status regs and clear engines */
 691         cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
 692         cm_control.rearm_stat_regs = 1;
 693         cm_control.alg_clr = 1;
 694         cm_control.wr_dma_clr = 1;
 695         cm_control.rd_dma_clr = 1;
 696
 697         MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
 698
 699         return 0;
 700 }
 701
 702 static ssize_t show_algo(struct device *dev, char *buf)
 703 {
 704         struct cx_dev *cx_dev = to_cx_dev(dev);
 705         struct mbcs_soft *soft = cx_dev->soft;
 706         uint64_t debug0;
 707
 708         /*
 709          * By convention, the first debug register contains the
 710          * algorithm number and revision.
 711          */
 712         debug0 = *(uint64_t *) soft->debug_addr;
 713
 714         return sprintf(buf, "0x%lx 0x%lx\n",
 715                        (debug0 >> 32), (debug0 & 0xffffffff));
 716 }
 717
 718 static ssize_t store_algo(struct device *dev, const char *buf, size_t count)
 719 {
 720         int n;
 721         struct cx_dev *cx_dev = to_cx_dev(dev);
 722         struct mbcs_soft *soft = cx_dev->soft;
 723
 724         if (count <= 0)
 725                 return 0;
 726
 727         n = simple_strtoul(buf, NULL, 0);
 728
 729         if (n == 1) {
 730                 mbcs_algo_start(soft);
 731                 if (wait_event_interruptible(soft->algo_queue,
 732                                         atomic_read(&soft->algo_done)))
 733                         return -ERESTARTSYS;
 734         }
 735
 736         return count;
 737 }
 738
 739 DEVICE_ATTR(algo, 0644, show_algo, store_algo);
 740
 741 /**
 742  * mbcs_probe - Initialize for device
 743  * @dev: device pointer
 744  * @device_id: id table pointer
 745  *
 746  */
 747 static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id)
 748 {
 749         struct mbcs_soft *soft;
 750
 751         dev->soft = NULL;
 752
 753         soft = kcalloc(1, sizeof(struct mbcs_soft), GFP_KERNEL);
 754         if (soft == NULL)
 755                 return -ENOMEM;
 756
 757         soft->nasid = dev->cx_id.nasid;
 758         list_add(&soft->list, &soft_list);
 759         soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid);
 760         dev->soft = soft;
 761         soft->cxdev = dev;
 762
 763         init_waitqueue_head(&soft->dmawrite_queue);
 764         init_waitqueue_head(&soft->dmaread_queue);
 765         init_waitqueue_head(&soft->algo_queue);
 766
 767         init_MUTEX(&soft->dmawritelock);
 768         init_MUTEX(&soft->dmareadlock);
 769         init_MUTEX(&soft->algolock);
 770
 771         mbcs_getdma_init(&soft->getdma);
 772         mbcs_putdma_init(&soft->putdma);
 773         mbcs_algo_init(&soft->algo);
 774
 775         mbcs_hw_init(soft);
 776
 777         /* Allocate interrupts */
 778         mbcs_intr_alloc(dev);
 779
 780         device_create_file(&dev->dev, &dev_attr_algo);
 781
 782         return 0;
 783 }
 784
 785 static int mbcs_remove(struct cx_dev *dev)
 786 {
 787         if (dev->soft) {
 788                 mbcs_intr_dealloc(dev);
 789                 kfree(dev->soft);
 790         }
 791
 792         device_remove_file(&dev->dev, &dev_attr_algo);
 793
 794         return 0;
 795 }
 796
 797 const struct cx_device_id __devinitdata mbcs_id_table[] = {
 798         {
 799          .part_num = MBCS_PART_NUM,
 800          .mfg_num = MBCS_MFG_NUM,
 801          },
 802         {
 803          .part_num = MBCS_PART_NUM_ALG0,
 804          .mfg_num = MBCS_MFG_NUM,
 805          },
 806         {0, 0}
 807 };
 808
 809 MODULE_DEVICE_TABLE(cx, mbcs_id_table);
 810
 811 struct cx_drv mbcs_driver = {
 812         .name = DEVICE_NAME,
 813         .id_table = mbcs_id_table,
 814         .probe = mbcs_probe,
 815         .remove = mbcs_remove,
 816 };
 817
 818 static void __exit mbcs_exit(void)
 819 {
 820         int rv;
 821
 822         rv = unregister_chrdev(mbcs_major, DEVICE_NAME);
 823         if (rv < 0)
 824                 DBG(KERN_ALERT "Error in unregister_chrdev: %d\n", rv);
 825
 826         cx_driver_unregister(&mbcs_driver);
 827 }
 828
 829 static int __init mbcs_init(void)
 830 {
 831         int rv;
 832
 833         // Put driver into chrdevs[].  Get major number.
 834         rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops);
 835         if (rv < 0) {
 836                 DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv);
 837                 return rv;
 838         }
 839         mbcs_major = rv;
 840
 841         return cx_driver_register(&mbcs_driver);
 842 }
 843
 844 module_init(mbcs_init);
 845 module_exit(mbcs_exit);
 846
 847 MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
 848 MODULE_DESCRIPTION("Driver for MOATB Core Services");
 849 MODULE_LICENSE("GPL");