git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qlogicpti.c

   1 /* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
   2  *
   3  * Copyright (C) 1996, 2006 David S. Miller (davem@davemloft.net)
   4  *
   5  * A lot of this driver was directly stolen from Erik H. Moe's PCI
   6  * Qlogic ISP driver.  Mucho kudos to him for this code.
   7  *
   8  * An even bigger kudos to John Grana at Performance Technologies
   9  * for providing me with the hardware to write this driver, you rule
  10  * John you really do.
  11  *
  12  * May, 2, 1997: Added support for QLGC,isp --jj
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/delay.h>
  17 #include <linux/types.h>
  18 #include <linux/string.h>
  19 #include <linux/slab.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/init.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/module.h>
  27 #include <linux/jiffies.h>
  28
  29 #include <asm/byteorder.h>
  30
  31 #include "qlogicpti.h"
  32
  33 #include <asm/sbus.h>
  34 #include <asm/dma.h>
  35 #include <asm/system.h>
  36 #include <asm/ptrace.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/oplib.h>
  39 #include <asm/io.h>
  40 #include <asm/irq.h>
  41
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_eh.h>
  46 #include <scsi/scsi_tcq.h>
  47 #include <scsi/scsi_host.h>
  48
  49 #define MAX_TARGETS     16
  50 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
  51
  52 #define DEFAULT_LOOP_COUNT      10000
  53
  54 #include "qlogicpti_asm.c"
  55
  56 static struct qlogicpti *qptichain = NULL;
  57 static DEFINE_SPINLOCK(qptichain_lock);
  58
  59 #define PACKB(a, b)                     (((a)<<4)|(b))
  60
  61 static const u_char mbox_param[] = {
  62         PACKB(1, 1),    /* MBOX_NO_OP */
  63         PACKB(5, 5),    /* MBOX_LOAD_RAM */
  64         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  65         PACKB(5, 5),    /* MBOX_DUMP_RAM */
  66         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  67         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  68         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  69         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  70         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  71         PACKB(0, 0),    /* 0x0009 */
  72         PACKB(0, 0),    /* 0x000a */
  73         PACKB(0, 0),    /* 0x000b */
  74         PACKB(0, 0),    /* 0x000c */
  75         PACKB(0, 0),    /* 0x000d */
  76         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  77         PACKB(0, 0),    /* 0x000f */
  78         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  79         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  80         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  81         PACKB(2, 2),    /* MBOX_WAKE_UP */
  82         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  83         PACKB(4, 4),    /* MBOX_ABORT */
  84         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  85         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  86         PACKB(2, 2),    /* MBOX_BUS_RESET */
  87         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  88         PACKB(2, 3),    /* MBOX_START_QUEUE */
  89         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  90         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  91         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  92         PACKB(0, 0),    /* 0x001e */
  93         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  94         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  95         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
  96         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
  97         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
  98         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
  99         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
 100         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
 101         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
 102         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
 103         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
 104         PACKB(0, 0),    /* 0x002a */
 105         PACKB(0, 0),    /* 0x002b */
 106         PACKB(0, 0),    /* 0x002c */
 107         PACKB(0, 0),    /* 0x002d */
 108         PACKB(0, 0),    /* 0x002e */
 109         PACKB(0, 0),    /* 0x002f */
 110         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 111         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 112         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 113         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 114         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 115         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 116         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 117         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 118         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 119         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 120         PACKB(0, 0),    /* 0x003a */
 121         PACKB(0, 0),    /* 0x003b */
 122         PACKB(0, 0),    /* 0x003c */
 123         PACKB(0, 0),    /* 0x003d */
 124         PACKB(0, 0),    /* 0x003e */
 125         PACKB(0, 0),    /* 0x003f */
 126         PACKB(0, 0),    /* 0x0040 */
 127         PACKB(0, 0),    /* 0x0041 */
 128         PACKB(0, 0)     /* 0x0042 */
 129 };
 130
 131 #define MAX_MBOX_COMMAND        ARRAY_SIZE(mbox_param)
 132
 133 /* queue length's _must_ be power of two: */
 134 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 135 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 136                                                     QLOGICPTI_REQ_QUEUE_LEN)
 137 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 138
 139 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 140 {
 141         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 142                     qpti->qregs + SBUS_CTRL);
 143 }
 144
 145 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 146 {
 147         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 148 }
 149
 150 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 151 {
 152         u16 val;
 153         u8 bursts = qpti->bursts;
 154
 155 #if 0   /* It appears that at least PTI cards do not support
 156          * 64-byte bursts and that setting the B64 bit actually
 157          * is a nop and the chip ends up using the smallest burst
 158          * size. -DaveM
 159          */
 160         if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) {
 161                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 162         } else
 163 #endif
 164         if (bursts & DMA_BURST32) {
 165                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 166         } else if (bursts & DMA_BURST16) {
 167                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 168         } else if (bursts & DMA_BURST8) {
 169                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 170         } else {
 171                 val = 0; /* No sbus bursts for you... */
 172         }
 173         sbus_writew(val, qpti->qregs + SBUS_CFG1);
 174 }
 175
 176 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 177 {
 178         int loop_count;
 179         u16 tmp;
 180
 181         if (mbox_param[param[0]] == 0)
 182                 return 1;
 183
 184         /* Set SBUS semaphore. */
 185         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 186         tmp |= SBUS_SEMAPHORE_LCK;
 187         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 188
 189         /* Wait for host IRQ bit to clear. */
 190         loop_count = DEFAULT_LOOP_COUNT;
 191         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 192                 barrier();
 193                 cpu_relax();
 194         }
 195         if (!loop_count)
 196                 printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
 197                        qpti->qpti_id);
 198
 199         /* Write mailbox command registers. */
 200         switch (mbox_param[param[0]] >> 4) {
 201         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 202         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 203         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 204         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 205         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 206         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 207         }
 208
 209         /* Clear RISC interrupt. */
 210         tmp = sbus_readw(qpti->qregs + HCCTRL);
 211         tmp |= HCCTRL_CRIRQ;
 212         sbus_writew(tmp, qpti->qregs + HCCTRL);
 213
 214         /* Clear SBUS semaphore. */
 215         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 216
 217         /* Set HOST interrupt. */
 218         tmp = sbus_readw(qpti->qregs + HCCTRL);
 219         tmp |= HCCTRL_SHIRQ;
 220         sbus_writew(tmp, qpti->qregs + HCCTRL);
 221
 222         /* Wait for HOST interrupt clears. */
 223         loop_count = DEFAULT_LOOP_COUNT;
 224         while (--loop_count &&
 225                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 226                 udelay(20);
 227         if (!loop_count)
 228                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
 229                        qpti->qpti_id, param[0]);
 230
 231         /* Wait for SBUS semaphore to get set. */
 232         loop_count = DEFAULT_LOOP_COUNT;
 233         while (--loop_count &&
 234                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 235                 udelay(20);
 236
 237                 /* Workaround for some buggy chips. */
 238                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 239                         break;
 240         }
 241         if (!loop_count)
 242                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
 243                        qpti->qpti_id, param[0]);
 244
 245         /* Wait for MBOX busy condition to go away. */
 246         loop_count = DEFAULT_LOOP_COUNT;
 247         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 248                 udelay(20);
 249         if (!loop_count)
 250                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
 251                        qpti->qpti_id, param[0]);
 252
 253         /* Read back output parameters. */
 254         switch (mbox_param[param[0]] & 0xf) {
 255         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 256         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 257         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 258         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 259         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 260         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 261         }
 262
 263         /* Clear RISC interrupt. */
 264         tmp = sbus_readw(qpti->qregs + HCCTRL);
 265         tmp |= HCCTRL_CRIRQ;
 266         sbus_writew(tmp, qpti->qregs + HCCTRL);
 267
 268         /* Release SBUS semaphore. */
 269         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 270         tmp &= ~(SBUS_SEMAPHORE_LCK);
 271         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 272
 273         /* We're done. */
 274         return 0;
 275 }
 276
 277 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 278 {
 279         int i;
 280
 281         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 282         qpti->host_param.bus_reset_delay = 3;
 283         qpti->host_param.retry_count = 0;
 284         qpti->host_param.retry_delay = 5;
 285         qpti->host_param.async_data_setup_time = 3;
 286         qpti->host_param.req_ack_active_negation = 1;
 287         qpti->host_param.data_line_active_negation = 1;
 288         qpti->host_param.data_dma_burst_enable = 1;
 289         qpti->host_param.command_dma_burst_enable = 1;
 290         qpti->host_param.tag_aging = 8;
 291         qpti->host_param.selection_timeout = 250;
 292         qpti->host_param.max_queue_depth = 256;
 293
 294         for(i = 0; i < MAX_TARGETS; i++) {
 295                 /*
 296                  * disconnect, parity, arq, reneg on reset, and, oddly enough
 297                  * tags...the midlayer's notion of tagged support has to match
 298                  * our device settings, and since we base whether we enable a
 299                  * tag on a  per-cmnd basis upon what the midlayer sez, we
 300                  * actually enable the capability here.
 301                  */
 302                 qpti->dev_param[i].device_flags = 0xcd;
 303                 qpti->dev_param[i].execution_throttle = 16;
 304                 if (qpti->ultra) {
 305                         qpti->dev_param[i].synchronous_period = 12;
 306                         qpti->dev_param[i].synchronous_offset = 8;
 307                 } else {
 308                         qpti->dev_param[i].synchronous_period = 25;
 309                         qpti->dev_param[i].synchronous_offset = 12;
 310                 }
 311                 qpti->dev_param[i].device_enable = 1;
 312         }
 313 }
 314
 315 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 316 {
 317         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 318         u_short param[6];
 319         unsigned short risc_code_addr;
 320         int loop_count, i;
 321         unsigned long flags;
 322
 323         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 324
 325         spin_lock_irqsave(host->host_lock, flags);
 326
 327         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 328
 329         /* Only reset the scsi bus if it is not free. */
 330         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 331                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 332                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 333                 udelay(400);
 334         }
 335
 336         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 337         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 338         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 339
 340         loop_count = DEFAULT_LOOP_COUNT;
 341         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 342                 udelay(20);
 343         if (!loop_count)
 344                 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
 345                        qpti->qpti_id);
 346
 347         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 348         set_sbus_cfg1(qpti);
 349         qlogicpti_enable_irqs(qpti);
 350
 351         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 352                 qpti->ultra = 1;
 353                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 354                             qpti->qregs + RISC_MTREG);
 355         } else {
 356                 qpti->ultra = 0;
 357                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 358                             qpti->qregs + RISC_MTREG);
 359         }
 360
 361         /* reset adapter and per-device default values. */
 362         /* do it after finding out whether we're ultra mode capable */
 363         qlogicpti_set_hostdev_defaults(qpti);
 364
 365         /* Release the RISC processor. */
 366         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 367
 368         /* Get RISC to start executing the firmware code. */
 369         param[0] = MBOX_EXEC_FIRMWARE;
 370         param[1] = risc_code_addr;
 371         if (qlogicpti_mbox_command(qpti, param, 1)) {
 372                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 373                        qpti->qpti_id);
 374                 spin_unlock_irqrestore(host->host_lock, flags);
 375                 return 1;
 376         }
 377
 378         /* Set initiator scsi ID. */
 379         param[0] = MBOX_SET_INIT_SCSI_ID;
 380         param[1] = qpti->host_param.initiator_scsi_id;
 381         if (qlogicpti_mbox_command(qpti, param, 1) ||
 382            (param[0] != MBOX_COMMAND_COMPLETE)) {
 383                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 384                        qpti->qpti_id);
 385                 spin_unlock_irqrestore(host->host_lock, flags);
 386                 return 1;
 387         }
 388
 389         /* Initialize state of the queues, both hw and sw. */
 390         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 391
 392         param[0] = MBOX_INIT_RES_QUEUE;
 393         param[1] = RES_QUEUE_LEN + 1;
 394         param[2] = (u_short) (qpti->res_dvma >> 16);
 395         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 396         param[4] = param[5] = 0;
 397         if (qlogicpti_mbox_command(qpti, param, 1)) {
 398                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 399                        qpti->qpti_id);
 400                 spin_unlock_irqrestore(host->host_lock, flags);
 401                 return 1;
 402         }
 403
 404         param[0] = MBOX_INIT_REQ_QUEUE;
 405         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 406         param[2] = (u_short) (qpti->req_dvma >> 16);
 407         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 408         param[4] = param[5] = 0;
 409         if (qlogicpti_mbox_command(qpti, param, 1)) {
 410                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 411                        qpti->qpti_id);
 412                 spin_unlock_irqrestore(host->host_lock, flags);
 413                 return 1;
 414         }
 415
 416         param[0] = MBOX_SET_RETRY_COUNT;
 417         param[1] = qpti->host_param.retry_count;
 418         param[2] = qpti->host_param.retry_delay;
 419         qlogicpti_mbox_command(qpti, param, 0);
 420
 421         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 422         param[1] = qpti->host_param.tag_aging;
 423         qlogicpti_mbox_command(qpti, param, 0);
 424
 425         for (i = 0; i < MAX_TARGETS; i++) {
 426                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 427                 param[1] = (i << 8);
 428                 qlogicpti_mbox_command(qpti, param, 0);
 429         }
 430
 431         param[0] = MBOX_GET_FIRMWARE_STATUS;
 432         qlogicpti_mbox_command(qpti, param, 0);
 433
 434         param[0] = MBOX_SET_SELECT_TIMEOUT;
 435         param[1] = qpti->host_param.selection_timeout;
 436         qlogicpti_mbox_command(qpti, param, 0);
 437
 438         for (i = 0; i < MAX_TARGETS; i++) {
 439                 param[0] = MBOX_SET_TARGET_PARAMS;
 440                 param[1] = (i << 8);
 441                 param[2] = (qpti->dev_param[i].device_flags << 8);
 442                 /*
 443                  * Since we're now loading 1.31 f/w, force narrow/async.
 444                  */
 445                 param[2] |= 0xc0;
 446                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 447                 qlogicpti_mbox_command(qpti, param, 0);
 448         }
 449
 450         /*
 451          * Always (sigh) do an initial bus reset (kicks f/w).
 452          */
 453         param[0] = MBOX_BUS_RESET;
 454         param[1] = qpti->host_param.bus_reset_delay;
 455         qlogicpti_mbox_command(qpti, param, 0);
 456         qpti->send_marker = 1;
 457
 458         spin_unlock_irqrestore(host->host_lock, flags);
 459         return 0;
 460 }
 461
 462 #define PTI_RESET_LIMIT 400
 463
 464 static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
 465 {
 466         struct Scsi_Host *host = qpti->qhost;
 467         unsigned short csum = 0;
 468         unsigned short param[6];
 469         unsigned short *risc_code, risc_code_addr, risc_code_length;
 470         unsigned long flags;
 471         int i, timeout;
 472
 473         risc_code = &sbus_risc_code01[0];
 474         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 475         risc_code_length = sbus_risc_code_length01;
 476
 477         spin_lock_irqsave(host->host_lock, flags);
 478
 479         /* Verify the checksum twice, one before loading it, and once
 480          * afterwards via the mailbox commands.
 481          */
 482         for (i = 0; i < risc_code_length; i++)
 483                 csum += risc_code[i];
 484         if (csum) {
 485                 spin_unlock_irqrestore(host->host_lock, flags);
 486                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 487                        qpti->qpti_id);
 488                 return 1;
 489         }
 490         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 491         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 492         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 493         timeout = PTI_RESET_LIMIT;
 494         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 495                 udelay(20);
 496         if (!timeout) {
 497                 spin_unlock_irqrestore(host->host_lock, flags);
 498                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 499                 return 1;
 500         }
 501
 502         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 503         mdelay(1);
 504
 505         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 506         set_sbus_cfg1(qpti);
 507         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 508
 509         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 510                 qpti->ultra = 1;
 511                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 512                             qpti->qregs + RISC_MTREG);
 513         } else {
 514                 qpti->ultra = 0;
 515                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 516                             qpti->qregs + RISC_MTREG);
 517         }
 518
 519         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 520
 521         /* Pin lines are only stable while RISC is paused. */
 522         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 523         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 524                 qpti->differential = 1;
 525         else
 526                 qpti->differential = 0;
 527         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 528
 529         /* This shouldn't be necessary- we've reset things so we should be
 530            running from the ROM now.. */
 531
 532         param[0] = MBOX_STOP_FIRMWARE;
 533         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 534         if (qlogicpti_mbox_command(qpti, param, 1)) {
 535                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 536                        qpti->qpti_id);
 537                 spin_unlock_irqrestore(host->host_lock, flags);
 538                 return 1;
 539         }
 540
 541         /* Load it up.. */
 542         for (i = 0; i < risc_code_length; i++) {
 543                 param[0] = MBOX_WRITE_RAM_WORD;
 544                 param[1] = risc_code_addr + i;
 545                 param[2] = risc_code[i];
 546                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 547                     param[0] != MBOX_COMMAND_COMPLETE) {
 548                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 549                                qpti->qpti_id);
 550                         spin_unlock_irqrestore(host->host_lock, flags);
 551                         return 1;
 552                 }
 553         }
 554
 555         /* Reset the ISP again. */
 556         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 557         mdelay(1);
 558
 559         qlogicpti_enable_irqs(qpti);
 560         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 561         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 562
 563         /* Ask ISP to verify the checksum of the new code. */
 564         param[0] = MBOX_VERIFY_CHECKSUM;
 565         param[1] = risc_code_addr;
 566         if (qlogicpti_mbox_command(qpti, param, 1) ||
 567             (param[0] != MBOX_COMMAND_COMPLETE)) {
 568                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 569                        qpti->qpti_id);
 570                 spin_unlock_irqrestore(host->host_lock, flags);
 571                 return 1;
 572         }
 573
 574         /* Start using newly downloaded firmware. */
 575         param[0] = MBOX_EXEC_FIRMWARE;
 576         param[1] = risc_code_addr;
 577         qlogicpti_mbox_command(qpti, param, 1);
 578
 579         param[0] = MBOX_ABOUT_FIRMWARE;
 580         if (qlogicpti_mbox_command(qpti, param, 1) ||
 581             (param[0] != MBOX_COMMAND_COMPLETE)) {
 582                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 583                        qpti->qpti_id);
 584                 spin_unlock_irqrestore(host->host_lock, flags);
 585                 return 1;
 586         }
 587
 588         /* Snag the major and minor revisions from the result. */
 589         qpti->fware_majrev = param[1];
 590         qpti->fware_minrev = param[2];
 591         qpti->fware_micrev = param[3];
 592
 593         /* Set the clock rate */
 594         param[0] = MBOX_SET_CLOCK_RATE;
 595         param[1] = qpti->clock;
 596         if (qlogicpti_mbox_command(qpti, param, 1) ||
 597             (param[0] != MBOX_COMMAND_COMPLETE)) {
 598                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 599                        qpti->qpti_id);
 600                 spin_unlock_irqrestore(host->host_lock, flags);
 601                 return 1;
 602         }
 603
 604         if (qpti->is_pti != 0) {
 605                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 606                 param[0] = MBOX_WRITE_RAM_WORD;
 607                 param[1] = 0xff80;
 608                 param[2] = (unsigned short) qpti->scsi_id;
 609                 qlogicpti_mbox_command(qpti, param, 1);
 610
 611                 param[0] = MBOX_WRITE_RAM_WORD;
 612                 param[1] = 0xff00;
 613                 param[2] = (unsigned short) 3;
 614                 qlogicpti_mbox_command(qpti, param, 1);
 615         }
 616
 617         spin_unlock_irqrestore(host->host_lock, flags);
 618         return 0;
 619 }
 620
 621 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 622 {
 623         int curstat = sbus_readb(qpti->sreg);
 624
 625         curstat &= 0xf0;
 626         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 627                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 628         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 629                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 630         if (curstat != qpti->swsreg) {
 631                 int error = 0;
 632                 if (curstat & SREG_FUSE) {
 633                         error++;
 634                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 635                 }
 636                 if (curstat & SREG_TPOWER) {
 637                         error++;
 638                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 639                 }
 640                 if (qpti->differential &&
 641                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 642                         error++;
 643                         printk("qlogicpti%d: You have a single ended device on a "
 644                                "differential bus!  Please fix!\n", qpti->qpti_id);
 645                 }
 646                 qpti->swsreg = curstat;
 647                 return error;
 648         }
 649         return 0;
 650 }
 651
 652 static irqreturn_t qpti_intr(int irq, void *dev_id);
 653
 654 static void __init qpti_chain_add(struct qlogicpti *qpti)
 655 {
 656         spin_lock_irq(&qptichain_lock);
 657         if (qptichain != NULL) {
 658                 struct qlogicpti *qlink = qptichain;
 659
 660                 while(qlink->next)
 661                         qlink = qlink->next;
 662                 qlink->next = qpti;
 663         } else {
 664                 qptichain = qpti;
 665         }
 666         qpti->next = NULL;
 667         spin_unlock_irq(&qptichain_lock);
 668 }
 669
 670 static void __init qpti_chain_del(struct qlogicpti *qpti)
 671 {
 672         spin_lock_irq(&qptichain_lock);
 673         if (qptichain == qpti) {
 674                 qptichain = qpti->next;
 675         } else {
 676                 struct qlogicpti *qlink = qptichain;
 677                 while(qlink->next != qpti)
 678                         qlink = qlink->next;
 679                 qlink->next = qpti->next;
 680         }
 681         qpti->next = NULL;
 682         spin_unlock_irq(&qptichain_lock);
 683 }
 684
 685 static int __init qpti_map_regs(struct qlogicpti *qpti)
 686 {
 687         struct sbus_dev *sdev = qpti->sdev;
 688
 689         qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
 690                                    sdev->reg_addrs[0].reg_size,
 691                                    "PTI Qlogic/ISP");
 692         if (!qpti->qregs) {
 693                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 694                 return -1;
 695         }
 696         if (qpti->is_pti) {
 697                 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
 698                                           sizeof(unsigned char),
 699                                           "PTI Qlogic/ISP statreg");
 700                 if (!qpti->sreg) {
 701                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 702                         return -1;
 703                 }
 704         }
 705         return 0;
 706 }
 707
 708 static int __init qpti_register_irq(struct qlogicpti *qpti)
 709 {
 710         struct sbus_dev *sdev = qpti->sdev;
 711
 712         qpti->qhost->irq = qpti->irq = sdev->irqs[0];
 713
 714         /* We used to try various overly-clever things to
 715          * reduce the interrupt processing overhead on
 716          * sun4c/sun4m when multiple PTI's shared the
 717          * same IRQ.  It was too complex and messy to
 718          * sanely maintain.
 719          */
 720         if (request_irq(qpti->irq, qpti_intr,
 721                         IRQF_SHARED, "Qlogic/PTI", qpti))
 722                 goto fail;
 723
 724         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 725
 726         return 0;
 727
 728 fail:
 729         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 730         return -1;
 731 }
 732
 733 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
 734 {
 735         qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 736                                            "initiator-id",
 737                                            -1);
 738         if (qpti->scsi_id == -1)
 739                 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 740                                                    "scsi-initiator-id",
 741                                                    -1);
 742         if (qpti->scsi_id == -1)
 743                 qpti->scsi_id =
 744                         prom_getintdefault(qpti->sdev->bus->prom_node,
 745                                            "scsi-initiator-id", 7);
 746         qpti->qhost->this_id = qpti->scsi_id;
 747         qpti->qhost->max_sectors = 64;
 748
 749         printk("SCSI ID %d ", qpti->scsi_id);
 750 }
 751
 752 static void qpti_get_bursts(struct qlogicpti *qpti)
 753 {
 754         struct sbus_dev *sdev = qpti->sdev;
 755         u8 bursts, bmask;
 756
 757         bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
 758         bmask = prom_getintdefault(sdev->bus->prom_node,
 759                                    "burst-sizes", 0xff);
 760         if (bmask != 0xff)
 761                 bursts &= bmask;
 762         if (bursts == 0xff ||
 763             (bursts & DMA_BURST16) == 0 ||
 764             (bursts & DMA_BURST32) == 0)
 765                 bursts = (DMA_BURST32 - 1);
 766
 767         qpti->bursts = bursts;
 768 }
 769
 770 static void qpti_get_clock(struct qlogicpti *qpti)
 771 {
 772         unsigned int cfreq;
 773
 774         /* Check for what the clock input to this card is.
 775          * Default to 40Mhz.
 776          */
 777         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 778         qpti->clock = (cfreq + 500000)/1000000;
 779         if (qpti->clock == 0) /* bullshit */
 780                 qpti->clock = 40;
 781 }
 782
 783 /* The request and response queues must each be aligned
 784  * on a page boundary.
 785  */
 786 static int __init qpti_map_queues(struct qlogicpti *qpti)
 787 {
 788         struct sbus_dev *sdev = qpti->sdev;
 789
 790 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 791         qpti->res_cpu = sbus_alloc_consistent(sdev,
 792                                               QSIZE(RES_QUEUE_LEN),
 793                                               &qpti->res_dvma);
 794         if (qpti->res_cpu == NULL ||
 795             qpti->res_dvma == 0) {
 796                 printk("QPTI: Cannot map response queue.\n");
 797                 return -1;
 798         }
 799
 800         qpti->req_cpu = sbus_alloc_consistent(sdev,
 801                                               QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 802                                               &qpti->req_dvma);
 803         if (qpti->req_cpu == NULL ||
 804             qpti->req_dvma == 0) {
 805                 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
 806                                      qpti->res_cpu, qpti->res_dvma);
 807                 printk("QPTI: Cannot map request queue.\n");
 808                 return -1;
 809         }
 810         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 811         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 812         return 0;
 813 }
 814
 815 const char *qlogicpti_info(struct Scsi_Host *host)
 816 {
 817         static char buf[80];
 818         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 819
 820         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
 821                 qpti->qhost->irq, qpti->qregs);
 822         return buf;
 823 }
 824
 825 /* I am a certified frobtronicist. */
 826 static inline void marker_frob(struct Command_Entry *cmd)
 827 {
 828         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 829
 830         memset(marker, 0, sizeof(struct Marker_Entry));
 831         marker->hdr.entry_cnt = 1;
 832         marker->hdr.entry_type = ENTRY_MARKER;
 833         marker->modifier = SYNC_ALL;
 834         marker->rsvd = 0;
 835 }
 836
 837 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
 838                             struct qlogicpti *qpti)
 839 {
 840         memset(cmd, 0, sizeof(struct Command_Entry));
 841         cmd->hdr.entry_cnt = 1;
 842         cmd->hdr.entry_type = ENTRY_COMMAND;
 843         cmd->target_id = Cmnd->device->id;
 844         cmd->target_lun = Cmnd->device->lun;
 845         cmd->cdb_length = Cmnd->cmd_len;
 846         cmd->control_flags = 0;
 847         if (Cmnd->device->tagged_supported) {
 848                 if (qpti->cmd_count[Cmnd->device->id] == 0)
 849                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 850                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
 851                         cmd->control_flags = CFLAG_ORDERED_TAG;
 852                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 853                 } else
 854                         cmd->control_flags = CFLAG_SIMPLE_TAG;
 855         }
 856         if ((Cmnd->cmnd[0] == WRITE_6) ||
 857             (Cmnd->cmnd[0] == WRITE_10) ||
 858             (Cmnd->cmnd[0] == WRITE_12))
 859                 cmd->control_flags |= CFLAG_WRITE;
 860         else
 861                 cmd->control_flags |= CFLAG_READ;
 862         cmd->time_out = 30;
 863         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
 864 }
 865
 866 /* Do it to it baby. */
 867 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
 868                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
 869 {
 870         struct dataseg *ds;
 871         struct scatterlist *sg, *s;
 872         int i, n;
 873
 874         if (Cmnd->use_sg) {
 875                 int sg_count;
 876
 877                 sg = (struct scatterlist *) Cmnd->request_buffer;
 878                 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
 879
 880                 ds = cmd->dataseg;
 881                 cmd->segment_cnt = sg_count;
 882
 883                 /* Fill in first four sg entries: */
 884                 n = sg_count;
 885                 if (n > 4)
 886                         n = 4;
 887                 for_each_sg(sg, s, n, i) {
 888                         ds[i].d_base = sg_dma_address(s);
 889                         ds[i].d_count = sg_dma_len(s);
 890                 }
 891                 sg_count -= 4;
 892                 sg = s;
 893                 while (sg_count > 0) {
 894                         struct Continuation_Entry *cont;
 895
 896                         ++cmd->hdr.entry_cnt;
 897                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
 898                         in_ptr = NEXT_REQ_PTR(in_ptr);
 899                         if (in_ptr == out_ptr)
 900                                 return -1;
 901
 902                         cont->hdr.entry_type = ENTRY_CONTINUATION;
 903                         cont->hdr.entry_cnt = 0;
 904                         cont->hdr.sys_def_1 = 0;
 905                         cont->hdr.flags = 0;
 906                         cont->reserved = 0;
 907                         ds = cont->dataseg;
 908                         n = sg_count;
 909                         if (n > 7)
 910                                 n = 7;
 911                         for_each_sg(sg, s, n, i) {
 912                                 ds[i].d_base = sg_dma_address(s);
 913                                 ds[i].d_count = sg_dma_len(s);
 914                         }
 915                         sg_count -= n;
 916                 }
 917         } else if (Cmnd->request_bufflen) {
 918                 Cmnd->SCp.ptr = (char *)(unsigned long)
 919                         sbus_map_single(qpti->sdev,
 920                                         Cmnd->request_buffer,
 921                                         Cmnd->request_bufflen,
 922                                         Cmnd->sc_data_direction);
 923
 924                 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
 925                 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
 926                 cmd->segment_cnt = 1;
 927         } else {
 928                 cmd->dataseg[0].d_base = 0;
 929                 cmd->dataseg[0].d_count = 0;
 930                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
 931         }
 932
 933         /* Committed, record Scsi_Cmd so we can find it later. */
 934         cmd->handle = in_ptr;
 935         qpti->cmd_slots[in_ptr] = Cmnd;
 936
 937         qpti->cmd_count[Cmnd->device->id]++;
 938         sbus_writew(in_ptr, qpti->qregs + MBOX4);
 939         qpti->req_in_ptr = in_ptr;
 940
 941         return in_ptr;
 942 }
 943
 944 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
 945 {
 946         /* Temporary workaround until bug is found and fixed (one bug has been found
 947            already, but fixing it makes things even worse) -jj */
 948         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
 949         host->can_queue = host->host_busy + num_free;
 950         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
 951 }
 952
 953 static int qlogicpti_slave_configure(struct scsi_device *sdev)
 954 {
 955         struct qlogicpti *qpti = shost_priv(sdev->host);
 956         int tgt = sdev->id;
 957         u_short param[6];
 958
 959         /* tags handled in midlayer */
 960         /* enable sync mode? */
 961         if (sdev->sdtr) {
 962                 qpti->dev_param[tgt].device_flags |= 0x10;
 963         } else {
 964                 qpti->dev_param[tgt].synchronous_offset = 0;
 965                 qpti->dev_param[tgt].synchronous_period = 0;
 966         }
 967         /* are we wide capable? */
 968         if (sdev->wdtr)
 969                 qpti->dev_param[tgt].device_flags |= 0x20;
 970
 971         param[0] = MBOX_SET_TARGET_PARAMS;
 972         param[1] = (tgt << 8);
 973         param[2] = (qpti->dev_param[tgt].device_flags << 8);
 974         if (qpti->dev_param[tgt].device_flags & 0x10) {
 975                 param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
 976                         qpti->dev_param[tgt].synchronous_period;
 977         } else {
 978                 param[3] = 0;
 979         }
 980         qlogicpti_mbox_command(qpti, param, 0);
 981         return 0;
 982 }
 983
 984 /*
 985  * The middle SCSI layer ensures that queuecommand never gets invoked
 986  * concurrently with itself or the interrupt handler (though the
 987  * interrupt handler may call this routine as part of
 988  * request-completion handling).
 989  *
 990  * "This code must fly." -davem
 991  */
 992 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
 993 {
 994         struct Scsi_Host *host = Cmnd->device->host;
 995         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 996         struct Command_Entry *cmd;
 997         u_int out_ptr;
 998         int in_ptr;
 999
1000         Cmnd->scsi_done = done;
1001
1002         in_ptr = qpti->req_in_ptr;
1003         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1004         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1005         in_ptr = NEXT_REQ_PTR(in_ptr);
1006         if (in_ptr == out_ptr)
1007                 goto toss_command;
1008
1009         if (qpti->send_marker) {
1010                 marker_frob(cmd);
1011                 qpti->send_marker = 0;
1012                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1013                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1014                         qpti->req_in_ptr = in_ptr;
1015                         goto toss_command;
1016                 }
1017                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1018                 in_ptr = NEXT_REQ_PTR(in_ptr);
1019         }
1020         cmd_frob(cmd, Cmnd, qpti);
1021         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1022                 goto toss_command;
1023
1024         update_can_queue(host, in_ptr, out_ptr);
1025
1026         return 0;
1027
1028 toss_command:
1029         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1030                qpti->qpti_id);
1031
1032         /* Unfortunately, unless you use the new EH code, which
1033          * we don't, the midlayer will ignore the return value,
1034          * which is insane.  We pick up the pieces like this.
1035          */
1036         Cmnd->result = DID_BUS_BUSY;
1037         done(Cmnd);
1038         return 1;
1039 }
1040
1041 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1042 {
1043         int host_status = DID_ERROR;
1044
1045         switch (sts->completion_status) {
1046               case CS_COMPLETE:
1047                 host_status = DID_OK;
1048                 break;
1049               case CS_INCOMPLETE:
1050                 if (!(sts->state_flags & SF_GOT_BUS))
1051                         host_status = DID_NO_CONNECT;
1052                 else if (!(sts->state_flags & SF_GOT_TARGET))
1053                         host_status = DID_BAD_TARGET;
1054                 else if (!(sts->state_flags & SF_SENT_CDB))
1055                         host_status = DID_ERROR;
1056                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1057                         host_status = DID_ERROR;
1058                 else if (!(sts->state_flags & SF_GOT_STATUS))
1059                         host_status = DID_ERROR;
1060                 else if (!(sts->state_flags & SF_GOT_SENSE))
1061                         host_status = DID_ERROR;
1062                 break;
1063               case CS_DMA_ERROR:
1064               case CS_TRANSPORT_ERROR:
1065                 host_status = DID_ERROR;
1066                 break;
1067               case CS_RESET_OCCURRED:
1068               case CS_BUS_RESET:
1069                 host_status = DID_RESET;
1070                 break;
1071               case CS_ABORTED:
1072                 host_status = DID_ABORT;
1073                 break;
1074               case CS_TIMEOUT:
1075                 host_status = DID_TIME_OUT;
1076                 break;
1077               case CS_DATA_OVERRUN:
1078               case CS_COMMAND_OVERRUN:
1079               case CS_STATUS_OVERRUN:
1080               case CS_BAD_MESSAGE:
1081               case CS_NO_MESSAGE_OUT:
1082               case CS_EXT_ID_FAILED:
1083               case CS_IDE_MSG_FAILED:
1084               case CS_ABORT_MSG_FAILED:
1085               case CS_NOP_MSG_FAILED:
1086               case CS_PARITY_ERROR_MSG_FAILED:
1087               case CS_DEVICE_RESET_MSG_FAILED:
1088               case CS_ID_MSG_FAILED:
1089               case CS_UNEXP_BUS_FREE:
1090                 host_status = DID_ERROR;
1091                 break;
1092               case CS_DATA_UNDERRUN:
1093                 host_status = DID_OK;
1094                 break;
1095               default:
1096                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1097                        id, sts->completion_status);
1098                 host_status = DID_ERROR;
1099                 break;
1100         }
1101
1102         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1103 }
1104
1105 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1106 {
1107         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1108         struct Status_Entry *sts;
1109         u_int in_ptr, out_ptr;
1110
1111         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1112                 return NULL;
1113
1114         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1115         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1116         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1117                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1118                 case ASYNC_SCSI_BUS_RESET:
1119                 case EXECUTION_TIMEOUT_RESET:
1120                         qpti->send_marker = 1;
1121                         break;
1122                 case INVALID_COMMAND:
1123                 case HOST_INTERFACE_ERROR:
1124                 case COMMAND_ERROR:
1125                 case COMMAND_PARAM_ERROR:
1126                         break;
1127                 };
1128                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1129         }
1130
1131         /* This looks like a network driver! */
1132         out_ptr = qpti->res_out_ptr;
1133         while (out_ptr != in_ptr) {
1134                 u_int cmd_slot;
1135
1136                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1137                 out_ptr = NEXT_RES_PTR(out_ptr);
1138
1139                 /* We store an index in the handle, not the pointer in
1140                  * some form.  This avoids problems due to the fact
1141                  * that the handle provided is only 32-bits. -DaveM
1142                  */
1143                 cmd_slot = sts->handle;
1144                 Cmnd = qpti->cmd_slots[cmd_slot];
1145                 qpti->cmd_slots[cmd_slot] = NULL;
1146
1147                 if (sts->completion_status == CS_RESET_OCCURRED ||
1148                     sts->completion_status == CS_ABORTED ||
1149                     (sts->status_flags & STF_BUS_RESET))
1150                         qpti->send_marker = 1;
1151
1152                 if (sts->state_flags & SF_GOT_SENSE)
1153                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1154                                sizeof(Cmnd->sense_buffer));
1155
1156                 if (sts->hdr.entry_type == ENTRY_STATUS)
1157                         Cmnd->result =
1158                             qlogicpti_return_status(sts, qpti->qpti_id);
1159                 else
1160                         Cmnd->result = DID_ERROR << 16;
1161
1162                 if (Cmnd->use_sg) {
1163                         sbus_unmap_sg(qpti->sdev,
1164                                       (struct scatterlist *)Cmnd->request_buffer,
1165                                       Cmnd->use_sg,
1166                                       Cmnd->sc_data_direction);
1167                 } else if (Cmnd->request_bufflen) {
1168                         sbus_unmap_single(qpti->sdev,
1169                                           (__u32)((unsigned long)Cmnd->SCp.ptr),
1170                                           Cmnd->request_bufflen,
1171                                           Cmnd->sc_data_direction);
1172                 }
1173                 qpti->cmd_count[Cmnd->device->id]--;
1174                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1175                 Cmnd->host_scribble = (unsigned char *) done_queue;
1176                 done_queue = Cmnd;
1177         }
1178         qpti->res_out_ptr = out_ptr;
1179
1180         return done_queue;
1181 }
1182
1183 static irqreturn_t qpti_intr(int irq, void *dev_id)
1184 {
1185         struct qlogicpti *qpti = dev_id;
1186         unsigned long flags;
1187         struct scsi_cmnd *dq;
1188
1189         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1190         dq = qlogicpti_intr_handler(qpti);
1191
1192         if (dq != NULL) {
1193                 do {
1194                         struct scsi_cmnd *next;
1195
1196                         next = (struct scsi_cmnd *) dq->host_scribble;
1197                         dq->scsi_done(dq);
1198                         dq = next;
1199                 } while (dq != NULL);
1200         }
1201         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1202
1203         return IRQ_HANDLED;
1204 }
1205
1206 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1207 {
1208         u_short param[6];
1209         struct Scsi_Host *host = Cmnd->device->host;
1210         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1211         int return_status = SUCCESS;
1212         u32 cmd_cookie;
1213         int i;
1214
1215         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1216                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1217
1218         qlogicpti_disable_irqs(qpti);
1219
1220         /* Find the 32-bit cookie we gave to the firmware for
1221          * this command.
1222          */
1223         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1224                 if (qpti->cmd_slots[i] == Cmnd)
1225                         break;
1226         cmd_cookie = i;
1227
1228         param[0] = MBOX_ABORT;
1229         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1230         param[2] = cmd_cookie >> 16;
1231         param[3] = cmd_cookie & 0xffff;
1232         if (qlogicpti_mbox_command(qpti, param, 0) ||
1233             (param[0] != MBOX_COMMAND_COMPLETE)) {
1234                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1235                        qpti->qpti_id, param[0]);
1236                 return_status = FAILED;
1237         }
1238
1239         qlogicpti_enable_irqs(qpti);
1240
1241         return return_status;
1242 }
1243
1244 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1245 {
1246         u_short param[6];
1247         struct Scsi_Host *host = Cmnd->device->host;
1248         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1249         int return_status = SUCCESS;
1250
1251         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1252                qpti->qpti_id);
1253
1254         qlogicpti_disable_irqs(qpti);
1255
1256         param[0] = MBOX_BUS_RESET;
1257         param[1] = qpti->host_param.bus_reset_delay;
1258         if (qlogicpti_mbox_command(qpti, param, 0) ||
1259            (param[0] != MBOX_COMMAND_COMPLETE)) {
1260                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1261                        qpti->qpti_id, param[0]);
1262                 return_status = FAILED;
1263         }
1264
1265         qlogicpti_enable_irqs(qpti);
1266
1267         return return_status;
1268 }
1269
1270 static struct scsi_host_template qpti_template = {
1271         .module                 = THIS_MODULE,
1272         .name                   = "qlogicpti",
1273         .info                   = qlogicpti_info,
1274         .queuecommand           = qlogicpti_queuecommand,
1275         .slave_configure        = qlogicpti_slave_configure,
1276         .eh_abort_handler       = qlogicpti_abort,
1277         .eh_bus_reset_handler   = qlogicpti_reset,
1278         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1279         .this_id                = 7,
1280         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1281         .cmd_per_lun            = 1,
1282         .use_clustering         = ENABLE_CLUSTERING,
1283 };
1284
1285 static int __devinit qpti_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1286 {
1287         static int nqptis;
1288         struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1289         struct device_node *dp = dev->node;
1290         struct scsi_host_template *tpnt = match->data;
1291         struct Scsi_Host *host;
1292         struct qlogicpti *qpti;
1293         const char *fcode;
1294
1295         /* Sometimes Antares cards come up not completely
1296          * setup, and we get a report of a zero IRQ.
1297          */
1298         if (sdev->irqs[0] == 0)
1299                 return -ENODEV;
1300
1301         host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1302         if (!host)
1303                 return -ENOMEM;
1304
1305         qpti = (struct qlogicpti *) host->hostdata;
1306
1307         host->max_id = MAX_TARGETS;
1308         qpti->qhost = host;
1309         qpti->sdev = sdev;
1310         qpti->qpti_id = nqptis;
1311         qpti->prom_node = sdev->prom_node;
1312         strcpy(qpti->prom_name, sdev->ofdev.node->name);
1313         qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1314
1315         if (qpti_map_regs(qpti) < 0)
1316                 goto fail_unlink;
1317
1318         if (qpti_register_irq(qpti) < 0)
1319                 goto fail_unmap_regs;
1320
1321         qpti_get_scsi_id(qpti);
1322         qpti_get_bursts(qpti);
1323         qpti_get_clock(qpti);
1324
1325         /* Clear out scsi_cmnd array. */
1326         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1327
1328         if (qpti_map_queues(qpti) < 0)
1329                 goto fail_free_irq;
1330
1331         /* Load the firmware. */
1332         if (qlogicpti_load_firmware(qpti))
1333                 goto fail_unmap_queues;
1334         if (qpti->is_pti) {
1335                 /* Check the PTI status reg. */
1336                 if (qlogicpti_verify_tmon(qpti))
1337                         goto fail_unmap_queues;
1338         }
1339
1340         /* Reset the ISP and init res/req queues. */
1341         if (qlogicpti_reset_hardware(host))
1342                 goto fail_unmap_queues;
1343
1344         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1345                qpti->fware_minrev, qpti->fware_micrev);
1346
1347         fcode = of_get_property(dp, "isp-fcode", NULL);
1348         if (fcode && fcode[0])
1349                 printk("(FCode %s)", fcode);
1350         if (of_find_property(dp, "differential", NULL) != NULL)
1351                 qpti->differential = 1;
1352
1353         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1354                 qpti->qpti_id,
1355                 (qpti->ultra ? "Ultra" : "Fast"),
1356                 (qpti->differential ? "differential" : "single ended"));
1357
1358         if (scsi_add_host(host, &dev->dev)) {
1359                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1360                 goto fail_unmap_queues;
1361         }
1362
1363         dev_set_drvdata(&sdev->ofdev.dev, qpti);
1364
1365         qpti_chain_add(qpti);
1366
1367         scsi_scan_host(host);
1368         nqptis++;
1369
1370         return 0;
1371
1372 fail_unmap_queues:
1373 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1374         sbus_free_consistent(qpti->sdev,
1375                              QSIZE(RES_QUEUE_LEN),
1376                              qpti->res_cpu, qpti->res_dvma);
1377         sbus_free_consistent(qpti->sdev,
1378                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1379                              qpti->req_cpu, qpti->req_dvma);
1380 #undef QSIZE
1381
1382 fail_unmap_regs:
1383         sbus_iounmap(qpti->qregs,
1384                      qpti->sdev->reg_addrs[0].reg_size);
1385         if (qpti->is_pti)
1386                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1387
1388 fail_free_irq:
1389         free_irq(qpti->irq, qpti);
1390
1391 fail_unlink:
1392         scsi_host_put(host);
1393
1394         return -ENODEV;
1395 }
1396
1397 static int __devexit qpti_sbus_remove(struct of_device *dev)
1398 {
1399         struct qlogicpti *qpti = dev_get_drvdata(&dev->dev);
1400
1401         qpti_chain_del(qpti);
1402
1403         scsi_remove_host(qpti->qhost);
1404
1405         /* Shut up the card. */
1406         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1407
1408         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1409         free_irq(qpti->irq, qpti);
1410
1411 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1412         sbus_free_consistent(qpti->sdev,
1413                              QSIZE(RES_QUEUE_LEN),
1414                              qpti->res_cpu, qpti->res_dvma);
1415         sbus_free_consistent(qpti->sdev,
1416                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1417                              qpti->req_cpu, qpti->req_dvma);
1418 #undef QSIZE
1419
1420         sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
1421         if (qpti->is_pti)
1422                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1423
1424         scsi_host_put(qpti->qhost);
1425
1426         return 0;
1427 }
1428
1429 static struct of_device_id qpti_match[] = {
1430         {
1431                 .name = "ptisp",
1432                 .data = &qpti_template,
1433         },
1434         {
1435                 .name = "PTI,ptisp",
1436                 .data = &qpti_template,
1437         },
1438         {
1439                 .name = "QLGC,isp",
1440                 .data = &qpti_template,
1441         },
1442         {
1443                 .name = "SUNW,isp",
1444                 .data = &qpti_template,
1445         },
1446         {},
1447 };
1448 MODULE_DEVICE_TABLE(of, qpti_match);
1449
1450 static struct of_platform_driver qpti_sbus_driver = {
1451         .name           = "qpti",
1452         .match_table    = qpti_match,
1453         .probe          = qpti_sbus_probe,
1454         .remove         = __devexit_p(qpti_sbus_remove),
1455 };
1456
1457 static int __init qpti_init(void)
1458 {
1459         return of_register_driver(&qpti_sbus_driver, &sbus_bus_type);
1460 }
1461
1462 static void __exit qpti_exit(void)
1463 {
1464         of_unregister_driver(&qpti_sbus_driver);
1465 }
1466
1467 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1468 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1469 MODULE_LICENSE("GPL");
1470 MODULE_VERSION("2.0");
1471
1472 module_init(qpti_init);
1473 module_exit(qpti_exit);