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         /* this is very important to set! */
 314         qpti->sbits = 1 << qpti->scsi_id;
 315 }
 316
 317 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 318 {
 319         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 320         u_short param[6];
 321         unsigned short risc_code_addr;
 322         int loop_count, i;
 323         unsigned long flags;
 324
 325         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 326
 327         spin_lock_irqsave(host->host_lock, flags);
 328
 329         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 330
 331         /* Only reset the scsi bus if it is not free. */
 332         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 333                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 334                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 335                 udelay(400);
 336         }
 337
 338         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 339         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 340         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 341
 342         loop_count = DEFAULT_LOOP_COUNT;
 343         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 344                 udelay(20);
 345         if (!loop_count)
 346                 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
 347                        qpti->qpti_id);
 348
 349         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 350         set_sbus_cfg1(qpti);
 351         qlogicpti_enable_irqs(qpti);
 352
 353         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 354                 qpti->ultra = 1;
 355                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 356                             qpti->qregs + RISC_MTREG);
 357         } else {
 358                 qpti->ultra = 0;
 359                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 360                             qpti->qregs + RISC_MTREG);
 361         }
 362
 363         /* reset adapter and per-device default values. */
 364         /* do it after finding out whether we're ultra mode capable */
 365         qlogicpti_set_hostdev_defaults(qpti);
 366
 367         /* Release the RISC processor. */
 368         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 369
 370         /* Get RISC to start executing the firmware code. */
 371         param[0] = MBOX_EXEC_FIRMWARE;
 372         param[1] = risc_code_addr;
 373         if (qlogicpti_mbox_command(qpti, param, 1)) {
 374                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 375                        qpti->qpti_id);
 376                 spin_unlock_irqrestore(host->host_lock, flags);
 377                 return 1;
 378         }
 379
 380         /* Set initiator scsi ID. */
 381         param[0] = MBOX_SET_INIT_SCSI_ID;
 382         param[1] = qpti->host_param.initiator_scsi_id;
 383         if (qlogicpti_mbox_command(qpti, param, 1) ||
 384            (param[0] != MBOX_COMMAND_COMPLETE)) {
 385                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 386                        qpti->qpti_id);
 387                 spin_unlock_irqrestore(host->host_lock, flags);
 388                 return 1;
 389         }
 390
 391         /* Initialize state of the queues, both hw and sw. */
 392         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 393
 394         param[0] = MBOX_INIT_RES_QUEUE;
 395         param[1] = RES_QUEUE_LEN + 1;
 396         param[2] = (u_short) (qpti->res_dvma >> 16);
 397         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 398         param[4] = param[5] = 0;
 399         if (qlogicpti_mbox_command(qpti, param, 1)) {
 400                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 401                        qpti->qpti_id);
 402                 spin_unlock_irqrestore(host->host_lock, flags);
 403                 return 1;
 404         }
 405
 406         param[0] = MBOX_INIT_REQ_QUEUE;
 407         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 408         param[2] = (u_short) (qpti->req_dvma >> 16);
 409         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 410         param[4] = param[5] = 0;
 411         if (qlogicpti_mbox_command(qpti, param, 1)) {
 412                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 413                        qpti->qpti_id);
 414                 spin_unlock_irqrestore(host->host_lock, flags);
 415                 return 1;
 416         }
 417
 418         param[0] = MBOX_SET_RETRY_COUNT;
 419         param[1] = qpti->host_param.retry_count;
 420         param[2] = qpti->host_param.retry_delay;
 421         qlogicpti_mbox_command(qpti, param, 0);
 422
 423         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 424         param[1] = qpti->host_param.tag_aging;
 425         qlogicpti_mbox_command(qpti, param, 0);
 426
 427         for (i = 0; i < MAX_TARGETS; i++) {
 428                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 429                 param[1] = (i << 8);
 430                 qlogicpti_mbox_command(qpti, param, 0);
 431         }
 432
 433         param[0] = MBOX_GET_FIRMWARE_STATUS;
 434         qlogicpti_mbox_command(qpti, param, 0);
 435
 436         param[0] = MBOX_SET_SELECT_TIMEOUT;
 437         param[1] = qpti->host_param.selection_timeout;
 438         qlogicpti_mbox_command(qpti, param, 0);
 439
 440         for (i = 0; i < MAX_TARGETS; i++) {
 441                 param[0] = MBOX_SET_TARGET_PARAMS;
 442                 param[1] = (i << 8);
 443                 param[2] = (qpti->dev_param[i].device_flags << 8);
 444                 /*
 445                  * Since we're now loading 1.31 f/w, force narrow/async.
 446                  */
 447                 param[2] |= 0xc0;
 448                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 449                 qlogicpti_mbox_command(qpti, param, 0);
 450         }
 451
 452         /*
 453          * Always (sigh) do an initial bus reset (kicks f/w).
 454          */
 455         param[0] = MBOX_BUS_RESET;
 456         param[1] = qpti->host_param.bus_reset_delay;
 457         qlogicpti_mbox_command(qpti, param, 0);
 458         qpti->send_marker = 1;
 459
 460         spin_unlock_irqrestore(host->host_lock, flags);
 461         return 0;
 462 }
 463
 464 #define PTI_RESET_LIMIT 400
 465
 466 static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
 467 {
 468         struct Scsi_Host *host = qpti->qhost;
 469         unsigned short csum = 0;
 470         unsigned short param[6];
 471         unsigned short *risc_code, risc_code_addr, risc_code_length;
 472         unsigned long flags;
 473         int i, timeout;
 474
 475         risc_code = &sbus_risc_code01[0];
 476         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 477         risc_code_length = sbus_risc_code_length01;
 478
 479         spin_lock_irqsave(host->host_lock, flags);
 480
 481         /* Verify the checksum twice, one before loading it, and once
 482          * afterwards via the mailbox commands.
 483          */
 484         for (i = 0; i < risc_code_length; i++)
 485                 csum += risc_code[i];
 486         if (csum) {
 487                 spin_unlock_irqrestore(host->host_lock, flags);
 488                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 489                        qpti->qpti_id);
 490                 return 1;
 491         }
 492         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 493         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 494         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 495         timeout = PTI_RESET_LIMIT;
 496         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 497                 udelay(20);
 498         if (!timeout) {
 499                 spin_unlock_irqrestore(host->host_lock, flags);
 500                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 501                 return 1;
 502         }
 503
 504         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 505         mdelay(1);
 506
 507         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 508         set_sbus_cfg1(qpti);
 509         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 510
 511         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 512                 qpti->ultra = 1;
 513                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 514                             qpti->qregs + RISC_MTREG);
 515         } else {
 516                 qpti->ultra = 0;
 517                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 518                             qpti->qregs + RISC_MTREG);
 519         }
 520
 521         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 522
 523         /* Pin lines are only stable while RISC is paused. */
 524         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 525         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 526                 qpti->differential = 1;
 527         else
 528                 qpti->differential = 0;
 529         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 530
 531         /* This shouldn't be necessary- we've reset things so we should be
 532            running from the ROM now.. */
 533
 534         param[0] = MBOX_STOP_FIRMWARE;
 535         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 536         if (qlogicpti_mbox_command(qpti, param, 1)) {
 537                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 538                        qpti->qpti_id);
 539                 spin_unlock_irqrestore(host->host_lock, flags);
 540                 return 1;
 541         }
 542
 543         /* Load it up.. */
 544         for (i = 0; i < risc_code_length; i++) {
 545                 param[0] = MBOX_WRITE_RAM_WORD;
 546                 param[1] = risc_code_addr + i;
 547                 param[2] = risc_code[i];
 548                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 549                     param[0] != MBOX_COMMAND_COMPLETE) {
 550                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 551                                qpti->qpti_id);
 552                         spin_unlock_irqrestore(host->host_lock, flags);
 553                         return 1;
 554                 }
 555         }
 556
 557         /* Reset the ISP again. */
 558         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 559         mdelay(1);
 560
 561         qlogicpti_enable_irqs(qpti);
 562         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 563         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 564
 565         /* Ask ISP to verify the checksum of the new code. */
 566         param[0] = MBOX_VERIFY_CHECKSUM;
 567         param[1] = risc_code_addr;
 568         if (qlogicpti_mbox_command(qpti, param, 1) ||
 569             (param[0] != MBOX_COMMAND_COMPLETE)) {
 570                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 571                        qpti->qpti_id);
 572                 spin_unlock_irqrestore(host->host_lock, flags);
 573                 return 1;
 574         }
 575
 576         /* Start using newly downloaded firmware. */
 577         param[0] = MBOX_EXEC_FIRMWARE;
 578         param[1] = risc_code_addr;
 579         qlogicpti_mbox_command(qpti, param, 1);
 580
 581         param[0] = MBOX_ABOUT_FIRMWARE;
 582         if (qlogicpti_mbox_command(qpti, param, 1) ||
 583             (param[0] != MBOX_COMMAND_COMPLETE)) {
 584                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 585                        qpti->qpti_id);
 586                 spin_unlock_irqrestore(host->host_lock, flags);
 587                 return 1;
 588         }
 589
 590         /* Snag the major and minor revisions from the result. */
 591         qpti->fware_majrev = param[1];
 592         qpti->fware_minrev = param[2];
 593         qpti->fware_micrev = param[3];
 594
 595         /* Set the clock rate */
 596         param[0] = MBOX_SET_CLOCK_RATE;
 597         param[1] = qpti->clock;
 598         if (qlogicpti_mbox_command(qpti, param, 1) ||
 599             (param[0] != MBOX_COMMAND_COMPLETE)) {
 600                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 601                        qpti->qpti_id);
 602                 spin_unlock_irqrestore(host->host_lock, flags);
 603                 return 1;
 604         }
 605
 606         if (qpti->is_pti != 0) {
 607                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 608                 param[0] = MBOX_WRITE_RAM_WORD;
 609                 param[1] = 0xff80;
 610                 param[2] = (unsigned short) qpti->scsi_id;
 611                 qlogicpti_mbox_command(qpti, param, 1);
 612
 613                 param[0] = MBOX_WRITE_RAM_WORD;
 614                 param[1] = 0xff00;
 615                 param[2] = (unsigned short) 3;
 616                 qlogicpti_mbox_command(qpti, param, 1);
 617         }
 618
 619         spin_unlock_irqrestore(host->host_lock, flags);
 620         return 0;
 621 }
 622
 623 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 624 {
 625         int curstat = sbus_readb(qpti->sreg);
 626
 627         curstat &= 0xf0;
 628         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 629                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 630         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 631                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 632         if (curstat != qpti->swsreg) {
 633                 int error = 0;
 634                 if (curstat & SREG_FUSE) {
 635                         error++;
 636                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 637                 }
 638                 if (curstat & SREG_TPOWER) {
 639                         error++;
 640                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 641                 }
 642                 if (qpti->differential &&
 643                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 644                         error++;
 645                         printk("qlogicpti%d: You have a single ended device on a "
 646                                "differential bus!  Please fix!\n", qpti->qpti_id);
 647                 }
 648                 qpti->swsreg = curstat;
 649                 return error;
 650         }
 651         return 0;
 652 }
 653
 654 static irqreturn_t qpti_intr(int irq, void *dev_id);
 655
 656 static void __init qpti_chain_add(struct qlogicpti *qpti)
 657 {
 658         spin_lock_irq(&qptichain_lock);
 659         if (qptichain != NULL) {
 660                 struct qlogicpti *qlink = qptichain;
 661
 662                 while(qlink->next)
 663                         qlink = qlink->next;
 664                 qlink->next = qpti;
 665         } else {
 666                 qptichain = qpti;
 667         }
 668         qpti->next = NULL;
 669         spin_unlock_irq(&qptichain_lock);
 670 }
 671
 672 static void __init qpti_chain_del(struct qlogicpti *qpti)
 673 {
 674         spin_lock_irq(&qptichain_lock);
 675         if (qptichain == qpti) {
 676                 qptichain = qpti->next;
 677         } else {
 678                 struct qlogicpti *qlink = qptichain;
 679                 while(qlink->next != qpti)
 680                         qlink = qlink->next;
 681                 qlink->next = qpti->next;
 682         }
 683         qpti->next = NULL;
 684         spin_unlock_irq(&qptichain_lock);
 685 }
 686
 687 static int __init qpti_map_regs(struct qlogicpti *qpti)
 688 {
 689         struct sbus_dev *sdev = qpti->sdev;
 690
 691         qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
 692                                    sdev->reg_addrs[0].reg_size,
 693                                    "PTI Qlogic/ISP");
 694         if (!qpti->qregs) {
 695                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 696                 return -1;
 697         }
 698         if (qpti->is_pti) {
 699                 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
 700                                           sizeof(unsigned char),
 701                                           "PTI Qlogic/ISP statreg");
 702                 if (!qpti->sreg) {
 703                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 704                         return -1;
 705                 }
 706         }
 707         return 0;
 708 }
 709
 710 static int __init qpti_register_irq(struct qlogicpti *qpti)
 711 {
 712         struct sbus_dev *sdev = qpti->sdev;
 713
 714         qpti->qhost->irq = qpti->irq = sdev->irqs[0];
 715
 716         /* We used to try various overly-clever things to
 717          * reduce the interrupt processing overhead on
 718          * sun4c/sun4m when multiple PTI's shared the
 719          * same IRQ.  It was too complex and messy to
 720          * sanely maintain.
 721          */
 722         if (request_irq(qpti->irq, qpti_intr,
 723                         IRQF_SHARED, "Qlogic/PTI", qpti))
 724                 goto fail;
 725
 726         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 727
 728         return 0;
 729
 730 fail:
 731         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 732         return -1;
 733 }
 734
 735 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
 736 {
 737         qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 738                                            "initiator-id",
 739                                            -1);
 740         if (qpti->scsi_id == -1)
 741                 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 742                                                    "scsi-initiator-id",
 743                                                    -1);
 744         if (qpti->scsi_id == -1)
 745                 qpti->scsi_id =
 746                         prom_getintdefault(qpti->sdev->bus->prom_node,
 747                                            "scsi-initiator-id", 7);
 748         qpti->qhost->this_id = qpti->scsi_id;
 749         qpti->qhost->max_sectors = 64;
 750
 751         printk("SCSI ID %d ", qpti->scsi_id);
 752 }
 753
 754 static void qpti_get_bursts(struct qlogicpti *qpti)
 755 {
 756         struct sbus_dev *sdev = qpti->sdev;
 757         u8 bursts, bmask;
 758
 759         bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
 760         bmask = prom_getintdefault(sdev->bus->prom_node,
 761                                    "burst-sizes", 0xff);
 762         if (bmask != 0xff)
 763                 bursts &= bmask;
 764         if (bursts == 0xff ||
 765             (bursts & DMA_BURST16) == 0 ||
 766             (bursts & DMA_BURST32) == 0)
 767                 bursts = (DMA_BURST32 - 1);
 768
 769         qpti->bursts = bursts;
 770 }
 771
 772 static void qpti_get_clock(struct qlogicpti *qpti)
 773 {
 774         unsigned int cfreq;
 775
 776         /* Check for what the clock input to this card is.
 777          * Default to 40Mhz.
 778          */
 779         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 780         qpti->clock = (cfreq + 500000)/1000000;
 781         if (qpti->clock == 0) /* bullshit */
 782                 qpti->clock = 40;
 783 }
 784
 785 /* The request and response queues must each be aligned
 786  * on a page boundary.
 787  */
 788 static int __init qpti_map_queues(struct qlogicpti *qpti)
 789 {
 790         struct sbus_dev *sdev = qpti->sdev;
 791
 792 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 793         qpti->res_cpu = sbus_alloc_consistent(sdev,
 794                                               QSIZE(RES_QUEUE_LEN),
 795                                               &qpti->res_dvma);
 796         if (qpti->res_cpu == NULL ||
 797             qpti->res_dvma == 0) {
 798                 printk("QPTI: Cannot map response queue.\n");
 799                 return -1;
 800         }
 801
 802         qpti->req_cpu = sbus_alloc_consistent(sdev,
 803                                               QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 804                                               &qpti->req_dvma);
 805         if (qpti->req_cpu == NULL ||
 806             qpti->req_dvma == 0) {
 807                 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
 808                                      qpti->res_cpu, qpti->res_dvma);
 809                 printk("QPTI: Cannot map request queue.\n");
 810                 return -1;
 811         }
 812         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 813         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 814         return 0;
 815 }
 816
 817 const char *qlogicpti_info(struct Scsi_Host *host)
 818 {
 819         static char buf[80];
 820         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 821
 822         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
 823                 qpti->qhost->irq, qpti->qregs);
 824         return buf;
 825 }
 826
 827 /* I am a certified frobtronicist. */
 828 static inline void marker_frob(struct Command_Entry *cmd)
 829 {
 830         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 831
 832         memset(marker, 0, sizeof(struct Marker_Entry));
 833         marker->hdr.entry_cnt = 1;
 834         marker->hdr.entry_type = ENTRY_MARKER;
 835         marker->modifier = SYNC_ALL;
 836         marker->rsvd = 0;
 837 }
 838
 839 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
 840                             struct qlogicpti *qpti)
 841 {
 842         memset(cmd, 0, sizeof(struct Command_Entry));
 843         cmd->hdr.entry_cnt = 1;
 844         cmd->hdr.entry_type = ENTRY_COMMAND;
 845         cmd->target_id = Cmnd->device->id;
 846         cmd->target_lun = Cmnd->device->lun;
 847         cmd->cdb_length = Cmnd->cmd_len;
 848         cmd->control_flags = 0;
 849         if (Cmnd->device->tagged_supported) {
 850                 if (qpti->cmd_count[Cmnd->device->id] == 0)
 851                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 852                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
 853                         cmd->control_flags = CFLAG_ORDERED_TAG;
 854                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 855                 } else
 856                         cmd->control_flags = CFLAG_SIMPLE_TAG;
 857         }
 858         if ((Cmnd->cmnd[0] == WRITE_6) ||
 859             (Cmnd->cmnd[0] == WRITE_10) ||
 860             (Cmnd->cmnd[0] == WRITE_12))
 861                 cmd->control_flags |= CFLAG_WRITE;
 862         else
 863                 cmd->control_flags |= CFLAG_READ;
 864         cmd->time_out = 30;
 865         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
 866 }
 867
 868 /* Do it to it baby. */
 869 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
 870                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
 871 {
 872         struct dataseg *ds;
 873         struct scatterlist *sg;
 874         int i, n;
 875
 876         if (Cmnd->use_sg) {
 877                 int sg_count;
 878
 879                 sg = (struct scatterlist *) Cmnd->request_buffer;
 880                 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
 881
 882                 ds = cmd->dataseg;
 883                 cmd->segment_cnt = sg_count;
 884
 885                 /* Fill in first four sg entries: */
 886                 n = sg_count;
 887                 if (n > 4)
 888                         n = 4;
 889                 for (i = 0; i < n; i++, sg++) {
 890                         ds[i].d_base = sg_dma_address(sg);
 891                         ds[i].d_count = sg_dma_len(sg);
 892                 }
 893                 sg_count -= 4;
 894                 while (sg_count > 0) {
 895                         struct Continuation_Entry *cont;
 896
 897                         ++cmd->hdr.entry_cnt;
 898                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
 899                         in_ptr = NEXT_REQ_PTR(in_ptr);
 900                         if (in_ptr == out_ptr)
 901                                 return -1;
 902
 903                         cont->hdr.entry_type = ENTRY_CONTINUATION;
 904                         cont->hdr.entry_cnt = 0;
 905                         cont->hdr.sys_def_1 = 0;
 906                         cont->hdr.flags = 0;
 907                         cont->reserved = 0;
 908                         ds = cont->dataseg;
 909                         n = sg_count;
 910                         if (n > 7)
 911                                 n = 7;
 912                         for (i = 0; i < n; i++, sg++) {
 913                                 ds[i].d_base = sg_dma_address(sg);
 914                                 ds[i].d_count = sg_dma_len(sg);
 915                         }
 916                         sg_count -= n;
 917                 }
 918         } else if (Cmnd->request_bufflen) {
 919                 Cmnd->SCp.ptr = (char *)(unsigned long)
 920                         sbus_map_single(qpti->sdev,
 921                                         Cmnd->request_buffer,
 922                                         Cmnd->request_bufflen,
 923                                         Cmnd->sc_data_direction);
 924
 925                 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
 926                 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
 927                 cmd->segment_cnt = 1;
 928         } else {
 929                 cmd->dataseg[0].d_base = 0;
 930                 cmd->dataseg[0].d_count = 0;
 931                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
 932         }
 933
 934         /* Committed, record Scsi_Cmd so we can find it later. */
 935         cmd->handle = in_ptr;
 936         qpti->cmd_slots[in_ptr] = Cmnd;
 937
 938         qpti->cmd_count[Cmnd->device->id]++;
 939         sbus_writew(in_ptr, qpti->qregs + MBOX4);
 940         qpti->req_in_ptr = in_ptr;
 941
 942         return in_ptr;
 943 }
 944
 945 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
 946 {
 947         /* Temporary workaround until bug is found and fixed (one bug has been found
 948            already, but fixing it makes things even worse) -jj */
 949         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
 950         host->can_queue = host->host_busy + num_free;
 951         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
 952 }
 953
 954 static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
 955 {
 956         unsigned char *buf;
 957         unsigned int buflen;
 958
 959         if (cmd->use_sg) {
 960                 struct scatterlist *sg;
 961
 962                 sg = (struct scatterlist *) cmd->request_buffer;
 963                 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
 964                 buflen = sg->length;
 965         } else {
 966                 buf = cmd->request_buffer;
 967                 buflen = cmd->request_bufflen;
 968         }
 969
 970         *buf_out = buf;
 971         return buflen;
 972 }
 973
 974 static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
 975 {
 976         if (cmd->use_sg) {
 977                 struct scatterlist *sg;
 978
 979                 sg = (struct scatterlist *) cmd->request_buffer;
 980                 kunmap_atomic(buf - sg->offset, KM_IRQ0);
 981         }
 982 }
 983
 984 /*
 985  * Until we scan the entire bus with inquiries, go throught this fella...
 986  */
 987 static void ourdone(struct scsi_cmnd *Cmnd)
 988 {
 989         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
 990         int tgt = Cmnd->device->id;
 991         void (*done) (struct scsi_cmnd *);
 992
 993         /* This grot added by DaveM, blame him for ugliness.
 994          * The issue is that in the 2.3.x driver we use the
 995          * host_scribble portion of the scsi command as a
 996          * completion linked list at interrupt service time,
 997          * so we have to store the done function pointer elsewhere.
 998          */
 999         done = (void (*)(struct scsi_cmnd *))
1000                 (((unsigned long) Cmnd->SCp.Message)
1001 #ifdef __sparc_v9__
1002                  | ((unsigned long) Cmnd->SCp.Status << 32UL)
1003 #endif
1004                  );
1005
1006         if ((qpti->sbits & (1 << tgt)) == 0) {
1007                 int ok = host_byte(Cmnd->result) == DID_OK;
1008                 if (Cmnd->cmnd[0] == 0x12 && ok) {
1009                         unsigned char *iqd;
1010                         unsigned int iqd_len;
1011
1012                         iqd_len = scsi_rbuf_get(Cmnd, &iqd);
1013
1014                         /* tags handled in midlayer */
1015                         /* enable sync mode? */
1016                         if (iqd[7] & 0x10) {
1017                                 qpti->dev_param[tgt].device_flags |= 0x10;
1018                         } else {
1019                                 qpti->dev_param[tgt].synchronous_offset = 0;
1020                                 qpti->dev_param[tgt].synchronous_period = 0;
1021                         }
1022                         /* are we wide capable? */
1023                         if (iqd[7] & 0x20) {
1024                                 qpti->dev_param[tgt].device_flags |= 0x20;
1025                         }
1026
1027                         scsi_rbuf_put(Cmnd, iqd);
1028
1029                         qpti->sbits |= (1 << tgt);
1030                 } else if (!ok) {
1031                         qpti->sbits |= (1 << tgt);
1032                 }
1033         }
1034         done(Cmnd);
1035 }
1036
1037 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
1038
1039 static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
1040                                        void (*done)(struct scsi_cmnd *))
1041 {
1042         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1043
1044         /*
1045          * done checking this host adapter?
1046          * If not, then rewrite the command
1047          * to finish through ourdone so we
1048          * can peek at Inquiry data results.
1049          */
1050         if (qpti->sbits && qpti->sbits != 0xffff) {
1051                 /* See above about in ourdone this ugliness... */
1052                 Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
1053 #ifdef CONFIG_SPARC64
1054                 Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
1055 #endif
1056                 return qlogicpti_queuecommand(Cmnd, ourdone);
1057         }
1058
1059         /*
1060          * We've peeked at all targets for this bus- time
1061          * to set parameters for devices for real now.
1062          */
1063         if (qpti->sbits == 0xffff) {
1064                 int i;
1065                 for(i = 0; i < MAX_TARGETS; i++) {
1066                         u_short param[6];
1067                         param[0] = MBOX_SET_TARGET_PARAMS;
1068                         param[1] = (i << 8);
1069                         param[2] = (qpti->dev_param[i].device_flags << 8);
1070                         if (qpti->dev_param[i].device_flags & 0x10) {
1071                                 param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
1072                                         qpti->dev_param[i].synchronous_period;
1073                         } else {
1074                                 param[3] = 0;
1075                         }
1076                         (void) qlogicpti_mbox_command(qpti, param, 0);
1077                 }
1078                 /*
1079                  * set to zero so any traverse through ourdone
1080                  * doesn't start the whole process again,
1081                  */
1082                 qpti->sbits = 0;
1083         }
1084
1085         /* check to see if we're done with all adapters... */
1086         for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
1087                 if (qpti->sbits) {
1088                         break;
1089                 }
1090         }
1091
1092         /*
1093          * if we hit the end of the chain w/o finding adapters still
1094          * capability-configuring, then we're done with all adapters
1095          * and can rock on..
1096          */
1097         if (qpti == NULL)
1098                 Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
1099
1100         return qlogicpti_queuecommand(Cmnd, done);
1101 }
1102
1103 /*
1104  * The middle SCSI layer ensures that queuecommand never gets invoked
1105  * concurrently with itself or the interrupt handler (though the
1106  * interrupt handler may call this routine as part of
1107  * request-completion handling).
1108  *
1109  * "This code must fly." -davem
1110  */
1111 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1112 {
1113         struct Scsi_Host *host = Cmnd->device->host;
1114         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1115         struct Command_Entry *cmd;
1116         u_int out_ptr;
1117         int in_ptr;
1118
1119         Cmnd->scsi_done = done;
1120
1121         in_ptr = qpti->req_in_ptr;
1122         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1123         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1124         in_ptr = NEXT_REQ_PTR(in_ptr);
1125         if (in_ptr == out_ptr)
1126                 goto toss_command;
1127
1128         if (qpti->send_marker) {
1129                 marker_frob(cmd);
1130                 qpti->send_marker = 0;
1131                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1132                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1133                         qpti->req_in_ptr = in_ptr;
1134                         goto toss_command;
1135                 }
1136                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1137                 in_ptr = NEXT_REQ_PTR(in_ptr);
1138         }
1139         cmd_frob(cmd, Cmnd, qpti);
1140         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1141                 goto toss_command;
1142
1143         update_can_queue(host, in_ptr, out_ptr);
1144
1145         return 0;
1146
1147 toss_command:
1148         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1149                qpti->qpti_id);
1150
1151         /* Unfortunately, unless you use the new EH code, which
1152          * we don't, the midlayer will ignore the return value,
1153          * which is insane.  We pick up the pieces like this.
1154          */
1155         Cmnd->result = DID_BUS_BUSY;
1156         done(Cmnd);
1157         return 1;
1158 }
1159
1160 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1161 {
1162         int host_status = DID_ERROR;
1163
1164         switch (sts->completion_status) {
1165               case CS_COMPLETE:
1166                 host_status = DID_OK;
1167                 break;
1168               case CS_INCOMPLETE:
1169                 if (!(sts->state_flags & SF_GOT_BUS))
1170                         host_status = DID_NO_CONNECT;
1171                 else if (!(sts->state_flags & SF_GOT_TARGET))
1172                         host_status = DID_BAD_TARGET;
1173                 else if (!(sts->state_flags & SF_SENT_CDB))
1174                         host_status = DID_ERROR;
1175                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1176                         host_status = DID_ERROR;
1177                 else if (!(sts->state_flags & SF_GOT_STATUS))
1178                         host_status = DID_ERROR;
1179                 else if (!(sts->state_flags & SF_GOT_SENSE))
1180                         host_status = DID_ERROR;
1181                 break;
1182               case CS_DMA_ERROR:
1183               case CS_TRANSPORT_ERROR:
1184                 host_status = DID_ERROR;
1185                 break;
1186               case CS_RESET_OCCURRED:
1187               case CS_BUS_RESET:
1188                 host_status = DID_RESET;
1189                 break;
1190               case CS_ABORTED:
1191                 host_status = DID_ABORT;
1192                 break;
1193               case CS_TIMEOUT:
1194                 host_status = DID_TIME_OUT;
1195                 break;
1196               case CS_DATA_OVERRUN:
1197               case CS_COMMAND_OVERRUN:
1198               case CS_STATUS_OVERRUN:
1199               case CS_BAD_MESSAGE:
1200               case CS_NO_MESSAGE_OUT:
1201               case CS_EXT_ID_FAILED:
1202               case CS_IDE_MSG_FAILED:
1203               case CS_ABORT_MSG_FAILED:
1204               case CS_NOP_MSG_FAILED:
1205               case CS_PARITY_ERROR_MSG_FAILED:
1206               case CS_DEVICE_RESET_MSG_FAILED:
1207               case CS_ID_MSG_FAILED:
1208               case CS_UNEXP_BUS_FREE:
1209                 host_status = DID_ERROR;
1210                 break;
1211               case CS_DATA_UNDERRUN:
1212                 host_status = DID_OK;
1213                 break;
1214               default:
1215                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1216                        id, sts->completion_status);
1217                 host_status = DID_ERROR;
1218                 break;
1219         }
1220
1221         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1222 }
1223
1224 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1225 {
1226         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1227         struct Status_Entry *sts;
1228         u_int in_ptr, out_ptr;
1229
1230         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1231                 return NULL;
1232
1233         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1234         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1235         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1236                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1237                 case ASYNC_SCSI_BUS_RESET:
1238                 case EXECUTION_TIMEOUT_RESET:
1239                         qpti->send_marker = 1;
1240                         break;
1241                 case INVALID_COMMAND:
1242                 case HOST_INTERFACE_ERROR:
1243                 case COMMAND_ERROR:
1244                 case COMMAND_PARAM_ERROR:
1245                         break;
1246                 };
1247                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1248         }
1249
1250         /* This looks like a network driver! */
1251         out_ptr = qpti->res_out_ptr;
1252         while (out_ptr != in_ptr) {
1253                 u_int cmd_slot;
1254
1255                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1256                 out_ptr = NEXT_RES_PTR(out_ptr);
1257
1258                 /* We store an index in the handle, not the pointer in
1259                  * some form.  This avoids problems due to the fact
1260                  * that the handle provided is only 32-bits. -DaveM
1261                  */
1262                 cmd_slot = sts->handle;
1263                 Cmnd = qpti->cmd_slots[cmd_slot];
1264                 qpti->cmd_slots[cmd_slot] = NULL;
1265
1266                 if (sts->completion_status == CS_RESET_OCCURRED ||
1267                     sts->completion_status == CS_ABORTED ||
1268                     (sts->status_flags & STF_BUS_RESET))
1269                         qpti->send_marker = 1;
1270
1271                 if (sts->state_flags & SF_GOT_SENSE)
1272                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1273                                sizeof(Cmnd->sense_buffer));
1274
1275                 if (sts->hdr.entry_type == ENTRY_STATUS)
1276                         Cmnd->result =
1277                             qlogicpti_return_status(sts, qpti->qpti_id);
1278                 else
1279                         Cmnd->result = DID_ERROR << 16;
1280
1281                 if (Cmnd->use_sg) {
1282                         sbus_unmap_sg(qpti->sdev,
1283                                       (struct scatterlist *)Cmnd->request_buffer,
1284                                       Cmnd->use_sg,
1285                                       Cmnd->sc_data_direction);
1286                 } else if (Cmnd->request_bufflen) {
1287                         sbus_unmap_single(qpti->sdev,
1288                                           (__u32)((unsigned long)Cmnd->SCp.ptr),
1289                                           Cmnd->request_bufflen,
1290                                           Cmnd->sc_data_direction);
1291                 }
1292                 qpti->cmd_count[Cmnd->device->id]--;
1293                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1294                 Cmnd->host_scribble = (unsigned char *) done_queue;
1295                 done_queue = Cmnd;
1296         }
1297         qpti->res_out_ptr = out_ptr;
1298
1299         return done_queue;
1300 }
1301
1302 static irqreturn_t qpti_intr(int irq, void *dev_id)
1303 {
1304         struct qlogicpti *qpti = dev_id;
1305         unsigned long flags;
1306         struct scsi_cmnd *dq;
1307
1308         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1309         dq = qlogicpti_intr_handler(qpti);
1310
1311         if (dq != NULL) {
1312                 do {
1313                         struct scsi_cmnd *next;
1314
1315                         next = (struct scsi_cmnd *) dq->host_scribble;
1316                         dq->scsi_done(dq);
1317                         dq = next;
1318                 } while (dq != NULL);
1319         }
1320         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1321
1322         return IRQ_HANDLED;
1323 }
1324
1325 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1326 {
1327         u_short param[6];
1328         struct Scsi_Host *host = Cmnd->device->host;
1329         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1330         int return_status = SUCCESS;
1331         u32 cmd_cookie;
1332         int i;
1333
1334         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1335                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1336
1337         qlogicpti_disable_irqs(qpti);
1338
1339         /* Find the 32-bit cookie we gave to the firmware for
1340          * this command.
1341          */
1342         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1343                 if (qpti->cmd_slots[i] == Cmnd)
1344                         break;
1345         cmd_cookie = i;
1346
1347         param[0] = MBOX_ABORT;
1348         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1349         param[2] = cmd_cookie >> 16;
1350         param[3] = cmd_cookie & 0xffff;
1351         if (qlogicpti_mbox_command(qpti, param, 0) ||
1352             (param[0] != MBOX_COMMAND_COMPLETE)) {
1353                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1354                        qpti->qpti_id, param[0]);
1355                 return_status = FAILED;
1356         }
1357
1358         qlogicpti_enable_irqs(qpti);
1359
1360         return return_status;
1361 }
1362
1363 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1364 {
1365         u_short param[6];
1366         struct Scsi_Host *host = Cmnd->device->host;
1367         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1368         int return_status = SUCCESS;
1369
1370         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1371                qpti->qpti_id);
1372
1373         qlogicpti_disable_irqs(qpti);
1374
1375         param[0] = MBOX_BUS_RESET;
1376         param[1] = qpti->host_param.bus_reset_delay;
1377         if (qlogicpti_mbox_command(qpti, param, 0) ||
1378            (param[0] != MBOX_COMMAND_COMPLETE)) {
1379                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1380                        qpti->qpti_id, param[0]);
1381                 return_status = FAILED;
1382         }
1383
1384         qlogicpti_enable_irqs(qpti);
1385
1386         return return_status;
1387 }
1388
1389 static struct scsi_host_template qpti_template = {
1390         .module                 = THIS_MODULE,
1391         .name                   = "qlogicpti",
1392         .info                   = qlogicpti_info,
1393         .queuecommand           = qlogicpti_queuecommand_slow,
1394         .eh_abort_handler       = qlogicpti_abort,
1395         .eh_bus_reset_handler   = qlogicpti_reset,
1396         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1397         .this_id                = 7,
1398         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1399         .cmd_per_lun            = 1,
1400         .use_clustering         = ENABLE_CLUSTERING,
1401 };
1402
1403 static int __devinit qpti_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1404 {
1405         static int nqptis;
1406         struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1407         struct device_node *dp = dev->node;
1408         struct scsi_host_template *tpnt = match->data;
1409         struct Scsi_Host *host;
1410         struct qlogicpti *qpti;
1411         const char *fcode;
1412
1413         /* Sometimes Antares cards come up not completely
1414          * setup, and we get a report of a zero IRQ.
1415          */
1416         if (sdev->irqs[0] == 0)
1417                 return -ENODEV;
1418
1419         host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1420         if (!host)
1421                 return -ENOMEM;
1422
1423         qpti = (struct qlogicpti *) host->hostdata;
1424
1425         host->max_id = MAX_TARGETS;
1426         qpti->qhost = host;
1427         qpti->sdev = sdev;
1428         qpti->qpti_id = nqptis;
1429         qpti->prom_node = sdev->prom_node;
1430         strcpy(qpti->prom_name, sdev->ofdev.node->name);
1431         qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1432
1433         if (qpti_map_regs(qpti) < 0)
1434                 goto fail_unlink;
1435
1436         if (qpti_register_irq(qpti) < 0)
1437                 goto fail_unmap_regs;
1438
1439         qpti_get_scsi_id(qpti);
1440         qpti_get_bursts(qpti);
1441         qpti_get_clock(qpti);
1442
1443         /* Clear out scsi_cmnd array. */
1444         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1445
1446         if (qpti_map_queues(qpti) < 0)
1447                 goto fail_free_irq;
1448
1449         /* Load the firmware. */
1450         if (qlogicpti_load_firmware(qpti))
1451                 goto fail_unmap_queues;
1452         if (qpti->is_pti) {
1453                 /* Check the PTI status reg. */
1454                 if (qlogicpti_verify_tmon(qpti))
1455                         goto fail_unmap_queues;
1456         }
1457
1458         /* Reset the ISP and init res/req queues. */
1459         if (qlogicpti_reset_hardware(host))
1460                 goto fail_unmap_queues;
1461
1462         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1463                qpti->fware_minrev, qpti->fware_micrev);
1464
1465         fcode = of_get_property(dp, "isp-fcode", NULL);
1466         if (fcode && fcode[0])
1467                 printk("(FCode %s)", fcode);
1468         if (of_find_property(dp, "differential", NULL) != NULL)
1469                 qpti->differential = 1;
1470
1471         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1472                 qpti->qpti_id,
1473                 (qpti->ultra ? "Ultra" : "Fast"),
1474                 (qpti->differential ? "differential" : "single ended"));
1475
1476         if (scsi_add_host(host, &dev->dev)) {
1477                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1478                 goto fail_unmap_queues;
1479         }
1480
1481         dev_set_drvdata(&sdev->ofdev.dev, qpti);
1482
1483         qpti_chain_add(qpti);
1484
1485         scsi_scan_host(host);
1486         nqptis++;
1487
1488         return 0;
1489
1490 fail_unmap_queues:
1491 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1492         sbus_free_consistent(qpti->sdev,
1493                              QSIZE(RES_QUEUE_LEN),
1494                              qpti->res_cpu, qpti->res_dvma);
1495         sbus_free_consistent(qpti->sdev,
1496                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1497                              qpti->req_cpu, qpti->req_dvma);
1498 #undef QSIZE
1499
1500 fail_unmap_regs:
1501         sbus_iounmap(qpti->qregs,
1502                      qpti->sdev->reg_addrs[0].reg_size);
1503         if (qpti->is_pti)
1504                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1505
1506 fail_free_irq:
1507         free_irq(qpti->irq, qpti);
1508
1509 fail_unlink:
1510         scsi_host_put(host);
1511
1512         return -ENODEV;
1513 }
1514
1515 static int __devexit qpti_sbus_remove(struct of_device *dev)
1516 {
1517         struct qlogicpti *qpti = dev_get_drvdata(&dev->dev);
1518
1519         qpti_chain_del(qpti);
1520
1521         scsi_remove_host(qpti->qhost);
1522
1523         /* Shut up the card. */
1524         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1525
1526         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1527         free_irq(qpti->irq, qpti);
1528
1529 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1530         sbus_free_consistent(qpti->sdev,
1531                              QSIZE(RES_QUEUE_LEN),
1532                              qpti->res_cpu, qpti->res_dvma);
1533         sbus_free_consistent(qpti->sdev,
1534                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1535                              qpti->req_cpu, qpti->req_dvma);
1536 #undef QSIZE
1537
1538         sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
1539         if (qpti->is_pti)
1540                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1541
1542         scsi_host_put(qpti->qhost);
1543
1544         return 0;
1545 }
1546
1547 static struct of_device_id qpti_match[] = {
1548         {
1549                 .name = "ptisp",
1550                 .data = &qpti_template,
1551         },
1552         {
1553                 .name = "PTI,ptisp",
1554                 .data = &qpti_template,
1555         },
1556         {
1557                 .name = "QLGC,isp",
1558                 .data = &qpti_template,
1559         },
1560         {
1561                 .name = "SUNW,isp",
1562                 .data = &qpti_template,
1563         },
1564         {},
1565 };
1566 MODULE_DEVICE_TABLE(of, qpti_match);
1567
1568 static struct of_platform_driver qpti_sbus_driver = {
1569         .name           = "qpti",
1570         .match_table    = qpti_match,
1571         .probe          = qpti_sbus_probe,
1572         .remove         = __devexit_p(qpti_sbus_remove),
1573 };
1574
1575 static int __init qpti_init(void)
1576 {
1577         return of_register_driver(&qpti_sbus_driver, &sbus_bus_type);
1578 }
1579
1580 static void __exit qpti_exit(void)
1581 {
1582         of_unregister_driver(&qpti_sbus_driver);
1583 }
1584
1585 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1586 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1587 MODULE_LICENSE("GPL");
1588 MODULE_VERSION("2.0");
1589
1590 module_init(qpti_init);
1591 module_exit(qpti_exit);