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 David S. Miller (davem@caipfs.rutgers.edu)
   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_request.h>
  47 #include <scsi/scsi_tcq.h>
  48 #include <scsi/scsi_host.h>
  49
  50
  51
  52 #define MAX_TARGETS     16
  53 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
  54
  55 #define DEFAULT_LOOP_COUNT      10000
  56
  57 #include "qlogicpti_asm.c"
  58
  59 static struct qlogicpti *qptichain = NULL;
  60 static DEFINE_SPINLOCK(qptichain_lock);
  61 static int qptis_running = 0;
  62
  63 #define PACKB(a, b)                     (((a)<<4)|(b))
  64
  65 static const u_char mbox_param[] = {
  66         PACKB(1, 1),    /* MBOX_NO_OP */
  67         PACKB(5, 5),    /* MBOX_LOAD_RAM */
  68         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  69         PACKB(5, 5),    /* MBOX_DUMP_RAM */
  70         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  71         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  72         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  73         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  74         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  75         PACKB(0, 0),    /* 0x0009 */
  76         PACKB(0, 0),    /* 0x000a */
  77         PACKB(0, 0),    /* 0x000b */
  78         PACKB(0, 0),    /* 0x000c */
  79         PACKB(0, 0),    /* 0x000d */
  80         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  81         PACKB(0, 0),    /* 0x000f */
  82         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  83         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  84         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  85         PACKB(2, 2),    /* MBOX_WAKE_UP */
  86         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  87         PACKB(4, 4),    /* MBOX_ABORT */
  88         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  89         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  90         PACKB(2, 2),    /* MBOX_BUS_RESET */
  91         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  92         PACKB(2, 3),    /* MBOX_START_QUEUE */
  93         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  94         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  95         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  96         PACKB(0, 0),    /* 0x001e */
  97         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  98         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  99         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
 100         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
 101         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
 102         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
 103         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
 104         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
 105         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
 106         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
 107         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
 108         PACKB(0, 0),    /* 0x002a */
 109         PACKB(0, 0),    /* 0x002b */
 110         PACKB(0, 0),    /* 0x002c */
 111         PACKB(0, 0),    /* 0x002d */
 112         PACKB(0, 0),    /* 0x002e */
 113         PACKB(0, 0),    /* 0x002f */
 114         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 115         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 116         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 117         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 118         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 119         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 120         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 121         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 122         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 123         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 124         PACKB(0, 0),    /* 0x003a */
 125         PACKB(0, 0),    /* 0x003b */
 126         PACKB(0, 0),    /* 0x003c */
 127         PACKB(0, 0),    /* 0x003d */
 128         PACKB(0, 0),    /* 0x003e */
 129         PACKB(0, 0),    /* 0x003f */
 130         PACKB(0, 0),    /* 0x0040 */
 131         PACKB(0, 0),    /* 0x0041 */
 132         PACKB(0, 0)     /* 0x0042 */
 133 };
 134
 135 #define MAX_MBOX_COMMAND        (sizeof(mbox_param)/sizeof(u_short))
 136
 137 /* queue length's _must_ be power of two: */
 138 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 139 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 140                                                     QLOGICPTI_REQ_QUEUE_LEN)
 141 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 142
 143 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 144 {
 145         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 146                     qpti->qregs + SBUS_CTRL);
 147 }
 148
 149 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 150 {
 151         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 152 }
 153
 154 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 155 {
 156         u16 val;
 157         u8 bursts = qpti->bursts;
 158
 159 #if 0   /* It appears that at least PTI cards do not support
 160          * 64-byte bursts and that setting the B64 bit actually
 161          * is a nop and the chip ends up using the smallest burst
 162          * size. -DaveM
 163          */
 164         if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) {
 165                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 166         } else
 167 #endif
 168         if (bursts & DMA_BURST32) {
 169                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 170         } else if (bursts & DMA_BURST16) {
 171                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 172         } else if (bursts & DMA_BURST8) {
 173                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 174         } else {
 175                 val = 0; /* No sbus bursts for you... */
 176         }
 177         sbus_writew(val, qpti->qregs + SBUS_CFG1);
 178 }
 179
 180 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 181 {
 182         int loop_count;
 183         u16 tmp;
 184
 185         if (mbox_param[param[0]] == 0)
 186                 return 1;
 187
 188         /* Set SBUS semaphore. */
 189         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 190         tmp |= SBUS_SEMAPHORE_LCK;
 191         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 192
 193         /* Wait for host IRQ bit to clear. */
 194         loop_count = DEFAULT_LOOP_COUNT;
 195         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 196                 barrier();
 197                 cpu_relax();
 198         }
 199         if (!loop_count)
 200                 printk(KERN_EMERG "qlogicpti: mbox_command loop timeout #1\n");
 201
 202         /* Write mailbox command registers. */
 203         switch (mbox_param[param[0]] >> 4) {
 204         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 205         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 206         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 207         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 208         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 209         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 210         }
 211
 212         /* Clear RISC interrupt. */
 213         tmp = sbus_readw(qpti->qregs + HCCTRL);
 214         tmp |= HCCTRL_CRIRQ;
 215         sbus_writew(tmp, qpti->qregs + HCCTRL);
 216
 217         /* Clear SBUS semaphore. */
 218         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 219
 220         /* Set HOST interrupt. */
 221         tmp = sbus_readw(qpti->qregs + HCCTRL);
 222         tmp |= HCCTRL_SHIRQ;
 223         sbus_writew(tmp, qpti->qregs + HCCTRL);
 224
 225         /* Wait for HOST interrupt clears. */
 226         loop_count = DEFAULT_LOOP_COUNT;
 227         while (--loop_count &&
 228                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 229                 udelay(20);
 230         if (!loop_count)
 231                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #2\n",
 232                        param[0]);
 233
 234         /* Wait for SBUS semaphore to get set. */
 235         loop_count = DEFAULT_LOOP_COUNT;
 236         while (--loop_count &&
 237                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 238                 udelay(20);
 239
 240                 /* Workaround for some buggy chips. */
 241                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 242                         break;
 243         }
 244         if (!loop_count)
 245                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #3\n",
 246                        param[0]);
 247
 248         /* Wait for MBOX busy condition to go away. */
 249         loop_count = DEFAULT_LOOP_COUNT;
 250         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 251                 udelay(20);
 252         if (!loop_count)
 253                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #4\n",
 254                        param[0]);
 255
 256         /* Read back output parameters. */
 257         switch (mbox_param[param[0]] & 0xf) {
 258         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 259         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 260         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 261         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 262         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 263         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 264         }
 265
 266         /* Clear RISC interrupt. */
 267         tmp = sbus_readw(qpti->qregs + HCCTRL);
 268         tmp |= HCCTRL_CRIRQ;
 269         sbus_writew(tmp, qpti->qregs + HCCTRL);
 270
 271         /* Release SBUS semaphore. */
 272         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 273         tmp &= ~(SBUS_SEMAPHORE_LCK);
 274         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 275
 276         /* We're done. */
 277         return 0;
 278 }
 279
 280 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 281 {
 282         int i;
 283
 284         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 285         qpti->host_param.bus_reset_delay = 3;
 286         qpti->host_param.retry_count = 0;
 287         qpti->host_param.retry_delay = 5;
 288         qpti->host_param.async_data_setup_time = 3;
 289         qpti->host_param.req_ack_active_negation = 1;
 290         qpti->host_param.data_line_active_negation = 1;
 291         qpti->host_param.data_dma_burst_enable = 1;
 292         qpti->host_param.command_dma_burst_enable = 1;
 293         qpti->host_param.tag_aging = 8;
 294         qpti->host_param.selection_timeout = 250;
 295         qpti->host_param.max_queue_depth = 256;
 296
 297         for(i = 0; i < MAX_TARGETS; i++) {
 298                 /*
 299                  * disconnect, parity, arq, reneg on reset, and, oddly enough
 300                  * tags...the midlayer's notion of tagged support has to match
 301                  * our device settings, and since we base whether we enable a
 302                  * tag on a  per-cmnd basis upon what the midlayer sez, we
 303                  * actually enable the capability here.
 304                  */
 305                 qpti->dev_param[i].device_flags = 0xcd;
 306                 qpti->dev_param[i].execution_throttle = 16;
 307                 if (qpti->ultra) {
 308                         qpti->dev_param[i].synchronous_period = 12;
 309                         qpti->dev_param[i].synchronous_offset = 8;
 310                 } else {
 311                         qpti->dev_param[i].synchronous_period = 25;
 312                         qpti->dev_param[i].synchronous_offset = 12;
 313                 }
 314                 qpti->dev_param[i].device_enable = 1;
 315         }
 316         /* this is very important to set! */
 317         qpti->sbits = 1 << qpti->scsi_id;
 318 }
 319
 320 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 321 {
 322         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 323         u_short param[6];
 324         unsigned short risc_code_addr;
 325         int loop_count, i;
 326         unsigned long flags;
 327
 328         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 329
 330         spin_lock_irqsave(host->host_lock, flags);
 331
 332         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 333
 334         /* Only reset the scsi bus if it is not free. */
 335         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 336                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 337                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 338                 udelay(400);
 339         }
 340
 341         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 342         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 343         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 344
 345         loop_count = DEFAULT_LOOP_COUNT;
 346         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 347                 udelay(20);
 348         if (!loop_count)
 349                 printk(KERN_EMERG "qlogicpti: reset_hardware loop timeout\n");
 350
 351         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 352         set_sbus_cfg1(qpti);
 353         qlogicpti_enable_irqs(qpti);
 354
 355         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 356                 qpti->ultra = 1;
 357                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 358                             qpti->qregs + RISC_MTREG);
 359         } else {
 360                 qpti->ultra = 0;
 361                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 362                             qpti->qregs + RISC_MTREG);
 363         }
 364
 365         /* reset adapter and per-device default values. */
 366         /* do it after finding out whether we're ultra mode capable */
 367         qlogicpti_set_hostdev_defaults(qpti);
 368
 369         /* Release the RISC processor. */
 370         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 371
 372         /* Get RISC to start executing the firmware code. */
 373         param[0] = MBOX_EXEC_FIRMWARE;
 374         param[1] = risc_code_addr;
 375         if (qlogicpti_mbox_command(qpti, param, 1)) {
 376                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 377                        qpti->qpti_id);
 378                 spin_unlock_irqrestore(host->host_lock, flags);
 379                 return 1;
 380         }
 381
 382         /* Set initiator scsi ID. */
 383         param[0] = MBOX_SET_INIT_SCSI_ID;
 384         param[1] = qpti->host_param.initiator_scsi_id;
 385         if (qlogicpti_mbox_command(qpti, param, 1) ||
 386            (param[0] != MBOX_COMMAND_COMPLETE)) {
 387                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 388                        qpti->qpti_id);
 389                 spin_unlock_irqrestore(host->host_lock, flags);
 390                 return 1;
 391         }
 392
 393         /* Initialize state of the queues, both hw and sw. */
 394         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 395
 396         param[0] = MBOX_INIT_RES_QUEUE;
 397         param[1] = RES_QUEUE_LEN + 1;
 398         param[2] = (u_short) (qpti->res_dvma >> 16);
 399         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 400         param[4] = param[5] = 0;
 401         if (qlogicpti_mbox_command(qpti, param, 1)) {
 402                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 403                        qpti->qpti_id);
 404                 spin_unlock_irqrestore(host->host_lock, flags);
 405                 return 1;
 406         }
 407
 408         param[0] = MBOX_INIT_REQ_QUEUE;
 409         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 410         param[2] = (u_short) (qpti->req_dvma >> 16);
 411         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 412         param[4] = param[5] = 0;
 413         if (qlogicpti_mbox_command(qpti, param, 1)) {
 414                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 415                        qpti->qpti_id);
 416                 spin_unlock_irqrestore(host->host_lock, flags);
 417                 return 1;
 418         }
 419
 420         param[0] = MBOX_SET_RETRY_COUNT;
 421         param[1] = qpti->host_param.retry_count;
 422         param[2] = qpti->host_param.retry_delay;
 423         qlogicpti_mbox_command(qpti, param, 0);
 424
 425         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 426         param[1] = qpti->host_param.tag_aging;
 427         qlogicpti_mbox_command(qpti, param, 0);
 428
 429         for (i = 0; i < MAX_TARGETS; i++) {
 430                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 431                 param[1] = (i << 8);
 432                 qlogicpti_mbox_command(qpti, param, 0);
 433         }
 434
 435         param[0] = MBOX_GET_FIRMWARE_STATUS;
 436         qlogicpti_mbox_command(qpti, param, 0);
 437
 438         param[0] = MBOX_SET_SELECT_TIMEOUT;
 439         param[1] = qpti->host_param.selection_timeout;
 440         qlogicpti_mbox_command(qpti, param, 0);
 441
 442         for (i = 0; i < MAX_TARGETS; i++) {
 443                 param[0] = MBOX_SET_TARGET_PARAMS;
 444                 param[1] = (i << 8);
 445                 param[2] = (qpti->dev_param[i].device_flags << 8);
 446                 /*
 447                  * Since we're now loading 1.31 f/w, force narrow/async.
 448                  */
 449                 param[2] |= 0xc0;
 450                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 451                 qlogicpti_mbox_command(qpti, param, 0);
 452         }
 453
 454         /*
 455          * Always (sigh) do an initial bus reset (kicks f/w).
 456          */
 457         param[0] = MBOX_BUS_RESET;
 458         param[1] = qpti->host_param.bus_reset_delay;
 459         qlogicpti_mbox_command(qpti, param, 0);
 460         qpti->send_marker = 1;
 461
 462         spin_unlock_irqrestore(host->host_lock, flags);
 463         return 0;
 464 }
 465
 466 #define PTI_RESET_LIMIT 400
 467
 468 static int __init qlogicpti_load_firmware(struct qlogicpti *qpti)
 469 {
 470         struct Scsi_Host *host = qpti->qhost;
 471         unsigned short csum = 0;
 472         unsigned short param[6];
 473         unsigned short *risc_code, risc_code_addr, risc_code_length;
 474         unsigned long flags;
 475         int i, timeout;
 476
 477         risc_code = &sbus_risc_code01[0];
 478         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 479         risc_code_length = sbus_risc_code_length01;
 480
 481         spin_lock_irqsave(host->host_lock, flags);
 482
 483         /* Verify the checksum twice, one before loading it, and once
 484          * afterwards via the mailbox commands.
 485          */
 486         for (i = 0; i < risc_code_length; i++)
 487                 csum += risc_code[i];
 488         if (csum) {
 489                 spin_unlock_irqrestore(host->host_lock, flags);
 490                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 491                        qpti->qpti_id);
 492                 return 1;
 493         }
 494         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 495         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 496         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 497         timeout = PTI_RESET_LIMIT;
 498         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 499                 udelay(20);
 500         if (!timeout) {
 501                 spin_unlock_irqrestore(host->host_lock, flags);
 502                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 503                 return 1;
 504         }
 505
 506         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 507         mdelay(1);
 508
 509         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 510         set_sbus_cfg1(qpti);
 511         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 512
 513         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 514                 qpti->ultra = 1;
 515                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 516                             qpti->qregs + RISC_MTREG);
 517         } else {
 518                 qpti->ultra = 0;
 519                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 520                             qpti->qregs + RISC_MTREG);
 521         }
 522
 523         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 524
 525         /* Pin lines are only stable while RISC is paused. */
 526         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 527         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 528                 qpti->differential = 1;
 529         else
 530                 qpti->differential = 0;
 531         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 532
 533         /* This shouldn't be necessary- we've reset things so we should be
 534            running from the ROM now.. */
 535
 536         param[0] = MBOX_STOP_FIRMWARE;
 537         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 538         if (qlogicpti_mbox_command(qpti, param, 1)) {
 539                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 540                        qpti->qpti_id);
 541                 spin_unlock_irqrestore(host->host_lock, flags);
 542                 return 1;
 543         }
 544
 545         /* Load it up.. */
 546         for (i = 0; i < risc_code_length; i++) {
 547                 param[0] = MBOX_WRITE_RAM_WORD;
 548                 param[1] = risc_code_addr + i;
 549                 param[2] = risc_code[i];
 550                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 551                     param[0] != MBOX_COMMAND_COMPLETE) {
 552                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 553                                qpti->qpti_id);
 554                         spin_unlock_irqrestore(host->host_lock, flags);
 555                         return 1;
 556                 }
 557         }
 558
 559         /* Reset the ISP again. */
 560         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 561         mdelay(1);
 562
 563         qlogicpti_enable_irqs(qpti);
 564         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 565         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 566
 567         /* Ask ISP to verify the checksum of the new code. */
 568         param[0] = MBOX_VERIFY_CHECKSUM;
 569         param[1] = risc_code_addr;
 570         if (qlogicpti_mbox_command(qpti, param, 1) ||
 571             (param[0] != MBOX_COMMAND_COMPLETE)) {
 572                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 573                        qpti->qpti_id);
 574                 spin_unlock_irqrestore(host->host_lock, flags);
 575                 return 1;
 576         }
 577
 578         /* Start using newly downloaded firmware. */
 579         param[0] = MBOX_EXEC_FIRMWARE;
 580         param[1] = risc_code_addr;
 581         qlogicpti_mbox_command(qpti, param, 1);
 582
 583         param[0] = MBOX_ABOUT_FIRMWARE;
 584         if (qlogicpti_mbox_command(qpti, param, 1) ||
 585             (param[0] != MBOX_COMMAND_COMPLETE)) {
 586                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 587                        qpti->qpti_id);
 588                 spin_unlock_irqrestore(host->host_lock, flags);
 589                 return 1;
 590         }
 591
 592         /* Snag the major and minor revisions from the result. */
 593         qpti->fware_majrev = param[1];
 594         qpti->fware_minrev = param[2];
 595         qpti->fware_micrev = param[3];
 596
 597         /* Set the clock rate */
 598         param[0] = MBOX_SET_CLOCK_RATE;
 599         param[1] = qpti->clock;
 600         if (qlogicpti_mbox_command(qpti, param, 1) ||
 601             (param[0] != MBOX_COMMAND_COMPLETE)) {
 602                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 603                        qpti->qpti_id);
 604                 spin_unlock_irqrestore(host->host_lock, flags);
 605                 return 1;
 606         }
 607
 608         if (qpti->is_pti != 0) {
 609                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 610                 param[0] = MBOX_WRITE_RAM_WORD;
 611                 param[1] = 0xff80;
 612                 param[2] = (unsigned short) qpti->scsi_id;
 613                 qlogicpti_mbox_command(qpti, param, 1);
 614
 615                 param[0] = MBOX_WRITE_RAM_WORD;
 616                 param[1] = 0xff00;
 617                 param[2] = (unsigned short) 3;
 618                 qlogicpti_mbox_command(qpti, param, 1);
 619         }
 620
 621         spin_unlock_irqrestore(host->host_lock, flags);
 622         return 0;
 623 }
 624
 625 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 626 {
 627         int curstat = sbus_readb(qpti->sreg);
 628
 629         curstat &= 0xf0;
 630         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 631                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 632         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 633                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 634         if (curstat != qpti->swsreg) {
 635                 int error = 0;
 636                 if (curstat & SREG_FUSE) {
 637                         error++;
 638                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 639                 }
 640                 if (curstat & SREG_TPOWER) {
 641                         error++;
 642                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 643                 }
 644                 if (qpti->differential &&
 645                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 646                         error++;
 647                         printk("qlogicpti%d: You have a single ended device on a "
 648                                "differential bus!  Please fix!\n", qpti->qpti_id);
 649                 }
 650                 qpti->swsreg = curstat;
 651                 return error;
 652         }
 653         return 0;
 654 }
 655
 656 static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs);
 657
 658 static void __init qpti_chain_add(struct qlogicpti *qpti)
 659 {
 660         spin_lock_irq(&qptichain_lock);
 661         if (qptichain != NULL) {
 662                 struct qlogicpti *qlink = qptichain;
 663
 664                 while(qlink->next)
 665                         qlink = qlink->next;
 666                 qlink->next = qpti;
 667         } else {
 668                 qptichain = qpti;
 669         }
 670         qpti->next = NULL;
 671         spin_unlock_irq(&qptichain_lock);
 672 }
 673
 674 static void __init qpti_chain_del(struct qlogicpti *qpti)
 675 {
 676         spin_lock_irq(&qptichain_lock);
 677         if (qptichain == qpti) {
 678                 qptichain = qpti->next;
 679         } else {
 680                 struct qlogicpti *qlink = qptichain;
 681                 while(qlink->next != qpti)
 682                         qlink = qlink->next;
 683                 qlink->next = qpti->next;
 684         }
 685         qpti->next = NULL;
 686         spin_unlock_irq(&qptichain_lock);
 687 }
 688
 689 static int __init qpti_map_regs(struct qlogicpti *qpti)
 690 {
 691         struct sbus_dev *sdev = qpti->sdev;
 692
 693         qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
 694                                    sdev->reg_addrs[0].reg_size,
 695                                    "PTI Qlogic/ISP");
 696         if (!qpti->qregs) {
 697                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 698                 return -1;
 699         }
 700         if (qpti->is_pti) {
 701                 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
 702                                           sizeof(unsigned char),
 703                                           "PTI Qlogic/ISP statreg");
 704                 if (!qpti->sreg) {
 705                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 706                         return -1;
 707                 }
 708         }
 709         return 0;
 710 }
 711
 712 static int __init qpti_register_irq(struct qlogicpti *qpti)
 713 {
 714         struct sbus_dev *sdev = qpti->sdev;
 715
 716         qpti->qhost->irq = qpti->irq = sdev->irqs[0];
 717
 718         /* We used to try various overly-clever things to
 719          * reduce the interrupt processing overhead on
 720          * sun4c/sun4m when multiple PTI's shared the
 721          * same IRQ.  It was too complex and messy to
 722          * sanely maintain.
 723          */
 724         if (request_irq(qpti->irq, qpti_intr,
 725                         SA_SHIRQ, "Qlogic/PTI", qpti))
 726                 goto fail;
 727
 728         printk("qpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 729
 730         return 0;
 731
 732 fail:
 733         printk("qpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 734         return -1;
 735 }
 736
 737 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
 738 {
 739         qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 740                                            "initiator-id",
 741                                            -1);
 742         if (qpti->scsi_id == -1)
 743                 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 744                                                    "scsi-initiator-id",
 745                                                    -1);
 746         if (qpti->scsi_id == -1)
 747                 qpti->scsi_id =
 748                         prom_getintdefault(qpti->sdev->bus->prom_node,
 749                                            "scsi-initiator-id", 7);
 750         qpti->qhost->this_id = qpti->scsi_id;
 751         qpti->qhost->max_sectors = 64;
 752
 753         printk("SCSI ID %d ", qpti->scsi_id);
 754 }
 755
 756 static void qpti_get_bursts(struct qlogicpti *qpti)
 757 {
 758         struct sbus_dev *sdev = qpti->sdev;
 759         u8 bursts, bmask;
 760
 761         bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
 762         bmask = prom_getintdefault(sdev->bus->prom_node,
 763                                    "burst-sizes", 0xff);
 764         if (bmask != 0xff)
 765                 bursts &= bmask;
 766         if (bursts == 0xff ||
 767             (bursts & DMA_BURST16) == 0 ||
 768             (bursts & DMA_BURST32) == 0)
 769                 bursts = (DMA_BURST32 - 1);
 770
 771         qpti->bursts = bursts;
 772 }
 773
 774 static void qpti_get_clock(struct qlogicpti *qpti)
 775 {
 776         unsigned int cfreq;
 777
 778         /* Check for what the clock input to this card is.
 779          * Default to 40Mhz.
 780          */
 781         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 782         qpti->clock = (cfreq + 500000)/1000000;
 783         if (qpti->clock == 0) /* bullshit */
 784                 qpti->clock = 40;
 785 }
 786
 787 /* The request and response queues must each be aligned
 788  * on a page boundary.
 789  */
 790 static int __init qpti_map_queues(struct qlogicpti *qpti)
 791 {
 792         struct sbus_dev *sdev = qpti->sdev;
 793
 794 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 795         qpti->res_cpu = sbus_alloc_consistent(sdev,
 796                                               QSIZE(RES_QUEUE_LEN),
 797                                               &qpti->res_dvma);
 798         if (qpti->res_cpu == NULL ||
 799             qpti->res_dvma == 0) {
 800                 printk("QPTI: Cannot map response queue.\n");
 801                 return -1;
 802         }
 803
 804         qpti->req_cpu = sbus_alloc_consistent(sdev,
 805                                               QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 806                                               &qpti->req_dvma);
 807         if (qpti->req_cpu == NULL ||
 808             qpti->req_dvma == 0) {
 809                 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
 810                                      qpti->res_cpu, qpti->res_dvma);
 811                 printk("QPTI: Cannot map request queue.\n");
 812                 return -1;
 813         }
 814         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 815         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 816         return 0;
 817 }
 818
 819 /* Detect all PTI Qlogic ISP's in the machine. */
 820 static int __init qlogicpti_detect(struct scsi_host_template *tpnt)
 821 {
 822         struct qlogicpti *qpti;
 823         struct Scsi_Host *qpti_host;
 824         struct sbus_bus *sbus;
 825         struct sbus_dev *sdev;
 826         int nqptis = 0, nqptis_in_use = 0;
 827
 828         tpnt->proc_name = "qlogicpti";
 829         for_each_sbus(sbus) {
 830                 for_each_sbusdev(sdev, sbus) {
 831                         /* Is this a red snapper? */
 832                         if (strcmp(sdev->prom_name, "ptisp") &&
 833                             strcmp(sdev->prom_name, "PTI,ptisp") &&
 834                             strcmp(sdev->prom_name, "QLGC,isp") &&
 835                             strcmp(sdev->prom_name, "SUNW,isp"))
 836                                 continue;
 837
 838                         /* Sometimes Antares cards come up not completely
 839                          * setup, and we get a report of a zero IRQ.
 840                          * Skip over them in such cases so we survive.
 841                          */
 842                         if (sdev->irqs[0] == 0) {
 843                                 printk("qpti%d: Adapter reports no interrupt, "
 844                                        "skipping over this card.", nqptis);
 845                                 continue;
 846                         }
 847
 848                         /* Yep, register and allocate software state. */
 849                         qpti_host = scsi_register(tpnt, sizeof(struct qlogicpti));
 850                         if (!qpti_host) {
 851                                 printk("QPTI: Cannot register PTI Qlogic ISP SCSI host");
 852                                 continue;
 853                         }
 854                         qpti = (struct qlogicpti *) qpti_host->hostdata;
 855
 856                         /* We are wide capable, 16 targets. */
 857                         qpti_host->max_id = MAX_TARGETS;
 858
 859                         /* Setup back pointers and misc. state. */
 860                         qpti->qhost = qpti_host;
 861                         qpti->sdev = sdev;
 862                         qpti->qpti_id = nqptis++;
 863                         qpti->prom_node = sdev->prom_node;
 864                         prom_getstring(qpti->prom_node, "name",
 865                                        qpti->prom_name,
 866                                        sizeof(qpti->prom_name));
 867
 868                         /* This is not correct, actually. There's a switch
 869                          * on the PTI cards that put them into "emulation"
 870                          * mode- i.e., report themselves as QLGC,isp
 871                          * instead of PTI,ptisp. The only real substantive
 872                          * difference between non-pti and pti cards is
 873                          * the tmon register. Which is possibly even
 874                          * there for Qlogic cards, but non-functional.
 875                          */
 876                         qpti->is_pti = (strcmp (qpti->prom_name, "QLGC,isp") != 0);
 877
 878                         qpti_chain_add(qpti);
 879                         if (qpti_map_regs(qpti) < 0)
 880                                 goto fail_unlink;
 881
 882                         if (qpti_register_irq(qpti) < 0)
 883                                 goto fail_unmap_regs;
 884
 885                         qpti_get_scsi_id(qpti);
 886                         qpti_get_bursts(qpti);
 887                         qpti_get_clock(qpti);
 888
 889                         /* Clear out scsi_cmnd array. */
 890                         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
 891
 892                         if (qpti_map_queues(qpti) < 0)
 893                                 goto fail_free_irq;
 894
 895                         /* Load the firmware. */
 896                         if (qlogicpti_load_firmware(qpti))
 897                                 goto fail_unmap_queues;
 898                         if (qpti->is_pti) {
 899                                 /* Check the PTI status reg. */
 900                                 if (qlogicpti_verify_tmon(qpti))
 901                                         goto fail_unmap_queues;
 902                         }
 903
 904                         /* Reset the ISP and init res/req queues. */
 905                         if (qlogicpti_reset_hardware(qpti_host))
 906                                 goto fail_unmap_queues;
 907
 908                         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
 909                             qpti->fware_minrev, qpti->fware_micrev);
 910                         {
 911                                 char buffer[60];
 912
 913                                 prom_getstring (qpti->prom_node,
 914                                                 "isp-fcode", buffer, 60);
 915                                 if (buffer[0])
 916                                         printk("(Firmware %s)", buffer);
 917                                 if (prom_getbool(qpti->prom_node, "differential"))
 918                                         qpti->differential = 1;
 919                         }
 920
 921                         printk (" [%s Wide, using %s interface]\n",
 922                                (qpti->ultra ? "Ultra" : "Fast"),
 923                                (qpti->differential ? "differential" : "single ended"));
 924
 925                         nqptis_in_use++;
 926                         continue;
 927
 928                 fail_unmap_queues:
 929 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 930                         sbus_free_consistent(qpti->sdev,
 931                                              QSIZE(RES_QUEUE_LEN),
 932                                              qpti->res_cpu, qpti->res_dvma);
 933                         sbus_free_consistent(qpti->sdev,
 934                                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 935                                              qpti->req_cpu, qpti->req_dvma);
 936 #undef QSIZE
 937                 fail_free_irq:
 938                         free_irq(qpti->irq, qpti);
 939
 940                 fail_unmap_regs:
 941                         sbus_iounmap(qpti->qregs,
 942                                      qpti->sdev->reg_addrs[0].reg_size);
 943                         if (qpti->is_pti)
 944                                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
 945                 fail_unlink:
 946                         qpti_chain_del(qpti);
 947                         scsi_unregister(qpti->qhost);
 948                 }
 949         }
 950         if (nqptis)
 951                 printk("QPTI: Total of %d PTI Qlogic/ISP hosts found, %d actually in use.\n",
 952                        nqptis, nqptis_in_use);
 953         qptis_running = nqptis_in_use;
 954         return nqptis;
 955 }
 956
 957 static int qlogicpti_release(struct Scsi_Host *host)
 958 {
 959         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 960
 961         /* Remove visibility from IRQ handlers. */
 962         qpti_chain_del(qpti);
 963
 964         /* Shut up the card. */
 965         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 966
 967         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
 968         free_irq(qpti->irq, qpti);
 969
 970 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 971         sbus_free_consistent(qpti->sdev,
 972                              QSIZE(RES_QUEUE_LEN),
 973                              qpti->res_cpu, qpti->res_dvma);
 974         sbus_free_consistent(qpti->sdev,
 975                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 976                              qpti->req_cpu, qpti->req_dvma);
 977 #undef QSIZE
 978
 979         sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
 980         if (qpti->is_pti)
 981                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
 982
 983         return 0;
 984 }
 985
 986 const char *qlogicpti_info(struct Scsi_Host *host)
 987 {
 988         static char buf[80];
 989         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 990
 991         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
 992                 qpti->qhost->irq, qpti->qregs);
 993         return buf;
 994 }
 995
 996 /* I am a certified frobtronicist. */
 997 static inline void marker_frob(struct Command_Entry *cmd)
 998 {
 999         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
1000
1001         memset(marker, 0, sizeof(struct Marker_Entry));
1002         marker->hdr.entry_cnt = 1;
1003         marker->hdr.entry_type = ENTRY_MARKER;
1004         marker->modifier = SYNC_ALL;
1005         marker->rsvd = 0;
1006 }
1007
1008 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
1009                             struct qlogicpti *qpti)
1010 {
1011         memset(cmd, 0, sizeof(struct Command_Entry));
1012         cmd->hdr.entry_cnt = 1;
1013         cmd->hdr.entry_type = ENTRY_COMMAND;
1014         cmd->target_id = Cmnd->device->id;
1015         cmd->target_lun = Cmnd->device->lun;
1016         cmd->cdb_length = Cmnd->cmd_len;
1017         cmd->control_flags = 0;
1018         if (Cmnd->device->tagged_supported) {
1019                 if (qpti->cmd_count[Cmnd->device->id] == 0)
1020                         qpti->tag_ages[Cmnd->device->id] = jiffies;
1021                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
1022                         cmd->control_flags = CFLAG_ORDERED_TAG;
1023                         qpti->tag_ages[Cmnd->device->id] = jiffies;
1024                 } else
1025                         cmd->control_flags = CFLAG_SIMPLE_TAG;
1026         }
1027         if ((Cmnd->cmnd[0] == WRITE_6) ||
1028             (Cmnd->cmnd[0] == WRITE_10) ||
1029             (Cmnd->cmnd[0] == WRITE_12))
1030                 cmd->control_flags |= CFLAG_WRITE;
1031         else
1032                 cmd->control_flags |= CFLAG_READ;
1033         cmd->time_out = 30;
1034         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
1035 }
1036
1037 /* Do it to it baby. */
1038 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
1039                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
1040 {
1041         struct dataseg *ds;
1042         struct scatterlist *sg;
1043         int i, n;
1044
1045         if (Cmnd->use_sg) {
1046                 int sg_count;
1047
1048                 sg = (struct scatterlist *) Cmnd->buffer;
1049                 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
1050
1051                 ds = cmd->dataseg;
1052                 cmd->segment_cnt = sg_count;
1053
1054                 /* Fill in first four sg entries: */
1055                 n = sg_count;
1056                 if (n > 4)
1057                         n = 4;
1058                 for (i = 0; i < n; i++, sg++) {
1059                         ds[i].d_base = sg_dma_address(sg);
1060                         ds[i].d_count = sg_dma_len(sg);
1061                 }
1062                 sg_count -= 4;
1063                 while (sg_count > 0) {
1064                         struct Continuation_Entry *cont;
1065
1066                         ++cmd->hdr.entry_cnt;
1067                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
1068                         in_ptr = NEXT_REQ_PTR(in_ptr);
1069                         if (in_ptr == out_ptr)
1070                                 return -1;
1071
1072                         cont->hdr.entry_type = ENTRY_CONTINUATION;
1073                         cont->hdr.entry_cnt = 0;
1074                         cont->hdr.sys_def_1 = 0;
1075                         cont->hdr.flags = 0;
1076                         cont->reserved = 0;
1077                         ds = cont->dataseg;
1078                         n = sg_count;
1079                         if (n > 7)
1080                                 n = 7;
1081                         for (i = 0; i < n; i++, sg++) {
1082                                 ds[i].d_base = sg_dma_address(sg);
1083                                 ds[i].d_count = sg_dma_len(sg);
1084                         }
1085                         sg_count -= n;
1086                 }
1087         } else if (Cmnd->request_bufflen) {
1088                 Cmnd->SCp.ptr = (char *)(unsigned long)
1089                         sbus_map_single(qpti->sdev,
1090                                         Cmnd->request_buffer,
1091                                         Cmnd->request_bufflen,
1092                                         Cmnd->sc_data_direction);
1093
1094                 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
1095                 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
1096                 cmd->segment_cnt = 1;
1097         } else {
1098                 cmd->dataseg[0].d_base = 0;
1099                 cmd->dataseg[0].d_count = 0;
1100                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
1101         }
1102
1103         /* Committed, record Scsi_Cmd so we can find it later. */
1104         cmd->handle = in_ptr;
1105         qpti->cmd_slots[in_ptr] = Cmnd;
1106
1107         qpti->cmd_count[Cmnd->device->id]++;
1108         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1109         qpti->req_in_ptr = in_ptr;
1110
1111         return in_ptr;
1112 }
1113
1114 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
1115 {
1116         /* Temporary workaround until bug is found and fixed (one bug has been found
1117            already, but fixing it makes things even worse) -jj */
1118         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
1119         host->can_queue = host->host_busy + num_free;
1120         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
1121 }
1122
1123 static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
1124 {
1125         unsigned char *buf;
1126         unsigned int buflen;
1127
1128         if (cmd->use_sg) {
1129                 struct scatterlist *sg;
1130
1131                 sg = (struct scatterlist *) cmd->request_buffer;
1132                 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1133                 buflen = sg->length;
1134         } else {
1135                 buf = cmd->request_buffer;
1136                 buflen = cmd->request_bufflen;
1137         }
1138
1139         *buf_out = buf;
1140         return buflen;
1141 }
1142
1143 static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
1144 {
1145         if (cmd->use_sg) {
1146                 struct scatterlist *sg;
1147
1148                 sg = (struct scatterlist *) cmd->request_buffer;
1149                 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1150         }
1151 }
1152
1153 /*
1154  * Until we scan the entire bus with inquiries, go throught this fella...
1155  */
1156 static void ourdone(struct scsi_cmnd *Cmnd)
1157 {
1158         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1159         int tgt = Cmnd->device->id;
1160         void (*done) (struct scsi_cmnd *);
1161
1162         /* This grot added by DaveM, blame him for ugliness.
1163          * The issue is that in the 2.3.x driver we use the
1164          * host_scribble portion of the scsi command as a
1165          * completion linked list at interrupt service time,
1166          * so we have to store the done function pointer elsewhere.
1167          */
1168         done = (void (*)(struct scsi_cmnd *))
1169                 (((unsigned long) Cmnd->SCp.Message)
1170 #ifdef __sparc_v9__
1171                  | ((unsigned long) Cmnd->SCp.Status << 32UL)
1172 #endif
1173                  );
1174
1175         if ((qpti->sbits & (1 << tgt)) == 0) {
1176                 int ok = host_byte(Cmnd->result) == DID_OK;
1177                 if (Cmnd->cmnd[0] == 0x12 && ok) {
1178                         unsigned char *iqd;
1179                         unsigned int iqd_len;
1180
1181                         iqd_len = scsi_rbuf_get(Cmnd, &iqd);
1182
1183                         /* tags handled in midlayer */
1184                         /* enable sync mode? */
1185                         if (iqd[7] & 0x10) {
1186                                 qpti->dev_param[tgt].device_flags |= 0x10;
1187                         } else {
1188                                 qpti->dev_param[tgt].synchronous_offset = 0;
1189                                 qpti->dev_param[tgt].synchronous_period = 0;
1190                         }
1191                         /* are we wide capable? */
1192                         if (iqd[7] & 0x20) {
1193                                 qpti->dev_param[tgt].device_flags |= 0x20;
1194                         }
1195
1196                         scsi_rbuf_put(Cmnd, iqd);
1197
1198                         qpti->sbits |= (1 << tgt);
1199                 } else if (!ok) {
1200                         qpti->sbits |= (1 << tgt);
1201                 }
1202         }
1203         done(Cmnd);
1204 }
1205
1206 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
1207
1208 static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
1209                                        void (*done)(struct scsi_cmnd *))
1210 {
1211         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1212
1213         /*
1214          * done checking this host adapter?
1215          * If not, then rewrite the command
1216          * to finish through ourdone so we
1217          * can peek at Inquiry data results.
1218          */
1219         if (qpti->sbits && qpti->sbits != 0xffff) {
1220                 /* See above about in ourdone this ugliness... */
1221                 Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
1222 #ifdef CONFIG_SPARC64
1223                 Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
1224 #endif
1225                 return qlogicpti_queuecommand(Cmnd, ourdone);
1226         }
1227
1228         /*
1229          * We've peeked at all targets for this bus- time
1230          * to set parameters for devices for real now.
1231          */
1232         if (qpti->sbits == 0xffff) {
1233                 int i;
1234                 for(i = 0; i < MAX_TARGETS; i++) {
1235                         u_short param[6];
1236                         param[0] = MBOX_SET_TARGET_PARAMS;
1237                         param[1] = (i << 8);
1238                         param[2] = (qpti->dev_param[i].device_flags << 8);
1239                         if (qpti->dev_param[i].device_flags & 0x10) {
1240                                 param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
1241                                         qpti->dev_param[i].synchronous_period;
1242                         } else {
1243                                 param[3] = 0;
1244                         }
1245                         (void) qlogicpti_mbox_command(qpti, param, 0);
1246                 }
1247                 /*
1248                  * set to zero so any traverse through ourdone
1249                  * doesn't start the whole process again,
1250                  */
1251                 qpti->sbits = 0;
1252         }
1253
1254         /* check to see if we're done with all adapters... */
1255         for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
1256                 if (qpti->sbits) {
1257                         break;
1258                 }
1259         }
1260
1261         /*
1262          * if we hit the end of the chain w/o finding adapters still
1263          * capability-configuring, then we're done with all adapters
1264          * and can rock on..
1265          */
1266         if (qpti == NULL)
1267                 Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
1268
1269         return qlogicpti_queuecommand(Cmnd, done);
1270 }
1271
1272 /*
1273  * The middle SCSI layer ensures that queuecommand never gets invoked
1274  * concurrently with itself or the interrupt handler (though the
1275  * interrupt handler may call this routine as part of
1276  * request-completion handling).
1277  *
1278  * "This code must fly." -davem
1279  */
1280 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1281 {
1282         struct Scsi_Host *host = Cmnd->device->host;
1283         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1284         struct Command_Entry *cmd;
1285         u_int out_ptr;
1286         int in_ptr;
1287
1288         Cmnd->scsi_done = done;
1289
1290         in_ptr = qpti->req_in_ptr;
1291         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1292         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1293         in_ptr = NEXT_REQ_PTR(in_ptr);
1294         if (in_ptr == out_ptr)
1295                 goto toss_command;
1296
1297         if (qpti->send_marker) {
1298                 marker_frob(cmd);
1299                 qpti->send_marker = 0;
1300                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1301                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1302                         qpti->req_in_ptr = in_ptr;
1303                         goto toss_command;
1304                 }
1305                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1306                 in_ptr = NEXT_REQ_PTR(in_ptr);
1307         }
1308         cmd_frob(cmd, Cmnd, qpti);
1309         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1310                 goto toss_command;
1311
1312         update_can_queue(host, in_ptr, out_ptr);
1313
1314         return 0;
1315
1316 toss_command:
1317         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1318                qpti->qpti_id);
1319
1320         /* Unfortunately, unless you use the new EH code, which
1321          * we don't, the midlayer will ignore the return value,
1322          * which is insane.  We pick up the pieces like this.
1323          */
1324         Cmnd->result = DID_BUS_BUSY;
1325         done(Cmnd);
1326         return 1;
1327 }
1328
1329 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1330 {
1331         int host_status = DID_ERROR;
1332
1333         switch (sts->completion_status) {
1334               case CS_COMPLETE:
1335                 host_status = DID_OK;
1336                 break;
1337               case CS_INCOMPLETE:
1338                 if (!(sts->state_flags & SF_GOT_BUS))
1339                         host_status = DID_NO_CONNECT;
1340                 else if (!(sts->state_flags & SF_GOT_TARGET))
1341                         host_status = DID_BAD_TARGET;
1342                 else if (!(sts->state_flags & SF_SENT_CDB))
1343                         host_status = DID_ERROR;
1344                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1345                         host_status = DID_ERROR;
1346                 else if (!(sts->state_flags & SF_GOT_STATUS))
1347                         host_status = DID_ERROR;
1348                 else if (!(sts->state_flags & SF_GOT_SENSE))
1349                         host_status = DID_ERROR;
1350                 break;
1351               case CS_DMA_ERROR:
1352               case CS_TRANSPORT_ERROR:
1353                 host_status = DID_ERROR;
1354                 break;
1355               case CS_RESET_OCCURRED:
1356               case CS_BUS_RESET:
1357                 host_status = DID_RESET;
1358                 break;
1359               case CS_ABORTED:
1360                 host_status = DID_ABORT;
1361                 break;
1362               case CS_TIMEOUT:
1363                 host_status = DID_TIME_OUT;
1364                 break;
1365               case CS_DATA_OVERRUN:
1366               case CS_COMMAND_OVERRUN:
1367               case CS_STATUS_OVERRUN:
1368               case CS_BAD_MESSAGE:
1369               case CS_NO_MESSAGE_OUT:
1370               case CS_EXT_ID_FAILED:
1371               case CS_IDE_MSG_FAILED:
1372               case CS_ABORT_MSG_FAILED:
1373               case CS_NOP_MSG_FAILED:
1374               case CS_PARITY_ERROR_MSG_FAILED:
1375               case CS_DEVICE_RESET_MSG_FAILED:
1376               case CS_ID_MSG_FAILED:
1377               case CS_UNEXP_BUS_FREE:
1378                 host_status = DID_ERROR;
1379                 break;
1380               case CS_DATA_UNDERRUN:
1381                 host_status = DID_OK;
1382                 break;
1383               default:
1384                 printk(KERN_EMERG "qpti%d: unknown completion status 0x%04x\n",
1385                        id, sts->completion_status);
1386                 host_status = DID_ERROR;
1387                 break;
1388         }
1389
1390         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1391 }
1392
1393 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1394 {
1395         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1396         struct Status_Entry *sts;
1397         u_int in_ptr, out_ptr;
1398
1399         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1400                 return NULL;
1401
1402         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1403         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1404         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1405                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1406                 case ASYNC_SCSI_BUS_RESET:
1407                 case EXECUTION_TIMEOUT_RESET:
1408                         qpti->send_marker = 1;
1409                         break;
1410                 case INVALID_COMMAND:
1411                 case HOST_INTERFACE_ERROR:
1412                 case COMMAND_ERROR:
1413                 case COMMAND_PARAM_ERROR:
1414                         break;
1415                 };
1416                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1417         }
1418
1419         /* This looks like a network driver! */
1420         out_ptr = qpti->res_out_ptr;
1421         while (out_ptr != in_ptr) {
1422                 u_int cmd_slot;
1423
1424                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1425                 out_ptr = NEXT_RES_PTR(out_ptr);
1426
1427                 /* We store an index in the handle, not the pointer in
1428                  * some form.  This avoids problems due to the fact
1429                  * that the handle provided is only 32-bits. -DaveM
1430                  */
1431                 cmd_slot = sts->handle;
1432                 Cmnd = qpti->cmd_slots[cmd_slot];
1433                 qpti->cmd_slots[cmd_slot] = NULL;
1434
1435                 if (sts->completion_status == CS_RESET_OCCURRED ||
1436                     sts->completion_status == CS_ABORTED ||
1437                     (sts->status_flags & STF_BUS_RESET))
1438                         qpti->send_marker = 1;
1439
1440                 if (sts->state_flags & SF_GOT_SENSE)
1441                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1442                                sizeof(Cmnd->sense_buffer));
1443
1444                 if (sts->hdr.entry_type == ENTRY_STATUS)
1445                         Cmnd->result =
1446                             qlogicpti_return_status(sts, qpti->qpti_id);
1447                 else
1448                         Cmnd->result = DID_ERROR << 16;
1449
1450                 if (Cmnd->use_sg) {
1451                         sbus_unmap_sg(qpti->sdev,
1452                                       (struct scatterlist *)Cmnd->buffer,
1453                                       Cmnd->use_sg,
1454                                       Cmnd->sc_data_direction);
1455                 } else {
1456                         sbus_unmap_single(qpti->sdev,
1457                                           (__u32)((unsigned long)Cmnd->SCp.ptr),
1458                                           Cmnd->request_bufflen,
1459                                           Cmnd->sc_data_direction);
1460                 }
1461                 qpti->cmd_count[Cmnd->device->id]--;
1462                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1463                 Cmnd->host_scribble = (unsigned char *) done_queue;
1464                 done_queue = Cmnd;
1465         }
1466         qpti->res_out_ptr = out_ptr;
1467
1468         return done_queue;
1469 }
1470
1471 static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs)
1472 {
1473         struct qlogicpti *qpti = dev_id;
1474         unsigned long flags;
1475         struct scsi_cmnd *dq;
1476
1477         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1478         dq = qlogicpti_intr_handler(qpti);
1479
1480         if (dq != NULL) {
1481                 do {
1482                         struct scsi_cmnd *next;
1483
1484                         next = (struct scsi_cmnd *) dq->host_scribble;
1485                         dq->scsi_done(dq);
1486                         dq = next;
1487                 } while (dq != NULL);
1488         }
1489         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1490
1491         return IRQ_HANDLED;
1492 }
1493
1494 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1495 {
1496         u_short param[6];
1497         struct Scsi_Host *host = Cmnd->device->host;
1498         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1499         int return_status = SUCCESS;
1500         u32 cmd_cookie;
1501         int i;
1502
1503         printk(KERN_WARNING "qlogicpti : Aborting cmd for tgt[%d] lun[%d]\n",
1504                (int)Cmnd->device->id, (int)Cmnd->device->lun);
1505
1506         qlogicpti_disable_irqs(qpti);
1507
1508         /* Find the 32-bit cookie we gave to the firmware for
1509          * this command.
1510          */
1511         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1512                 if (qpti->cmd_slots[i] == Cmnd)
1513                         break;
1514         cmd_cookie = i;
1515
1516         param[0] = MBOX_ABORT;
1517         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1518         param[2] = cmd_cookie >> 16;
1519         param[3] = cmd_cookie & 0xffff;
1520         if (qlogicpti_mbox_command(qpti, param, 0) ||
1521             (param[0] != MBOX_COMMAND_COMPLETE)) {
1522                 printk(KERN_EMERG "qlogicpti : scsi abort failure: %x\n", param[0]);
1523                 return_status = FAILED;
1524         }
1525
1526         qlogicpti_enable_irqs(qpti);
1527
1528         return return_status;
1529 }
1530
1531 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1532 {
1533         u_short param[6];
1534         struct Scsi_Host *host = Cmnd->device->host;
1535         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1536         int return_status = SUCCESS;
1537
1538         printk(KERN_WARNING "qlogicpti : Resetting SCSI bus!\n");
1539
1540         qlogicpti_disable_irqs(qpti);
1541
1542         param[0] = MBOX_BUS_RESET;
1543         param[1] = qpti->host_param.bus_reset_delay;
1544         if (qlogicpti_mbox_command(qpti, param, 0) ||
1545            (param[0] != MBOX_COMMAND_COMPLETE)) {
1546                 printk(KERN_EMERG "qlogicisp : scsi bus reset failure: %x\n", param[0]);
1547                 return_status = FAILED;
1548         }
1549
1550         qlogicpti_enable_irqs(qpti);
1551
1552         return return_status;
1553 }
1554
1555 static struct scsi_host_template driver_template = {
1556         .detect                 = qlogicpti_detect,
1557         .release                = qlogicpti_release,
1558         .info                   = qlogicpti_info,
1559         .queuecommand           = qlogicpti_queuecommand_slow,
1560         .eh_abort_handler       = qlogicpti_abort,
1561         .eh_bus_reset_handler   = qlogicpti_reset,
1562         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1563         .this_id                = 7,
1564         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1565         .cmd_per_lun            = 1,
1566         .use_clustering         = ENABLE_CLUSTERING,
1567 };
1568
1569
1570 #include "scsi_module.c"
1571
1572 MODULE_LICENSE("GPL");
1573