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
  28 #include <asm/byteorder.h>
  29
  30 #include "qlogicpti.h"
  31
  32 #include <asm/sbus.h>
  33 #include <asm/dma.h>
  34 #include <asm/system.h>
  35 #include <asm/ptrace.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/oplib.h>
  38 #include <asm/io.h>
  39 #include <asm/irq.h>
  40
  41 #include <scsi/scsi.h>
  42 #include <scsi/scsi_cmnd.h>
  43 #include <scsi/scsi_device.h>
  44 #include <scsi/scsi_eh.h>
  45 #include <scsi/scsi_request.h>
  46 #include <scsi/scsi_tcq.h>
  47 #include <scsi/scsi_host.h>
  48
  49
  50
  51 #define MAX_TARGETS     16
  52 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
  53
  54 #define DEFAULT_LOOP_COUNT      10000
  55
  56 #include "qlogicpti_asm.c"
  57
  58 static struct qlogicpti *qptichain = NULL;
  59 static DEFINE_SPINLOCK(qptichain_lock);
  60 static int qptis_running = 0;
  61
  62 #define PACKB(a, b)                     (((a)<<4)|(b))
  63
  64 static const u_char mbox_param[] = {
  65         PACKB(1, 1),    /* MBOX_NO_OP */
  66         PACKB(5, 5),    /* MBOX_LOAD_RAM */
  67         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  68         PACKB(5, 5),    /* MBOX_DUMP_RAM */
  69         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  70         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  71         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  72         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  73         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  74         PACKB(0, 0),    /* 0x0009 */
  75         PACKB(0, 0),    /* 0x000a */
  76         PACKB(0, 0),    /* 0x000b */
  77         PACKB(0, 0),    /* 0x000c */
  78         PACKB(0, 0),    /* 0x000d */
  79         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  80         PACKB(0, 0),    /* 0x000f */
  81         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  82         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  83         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  84         PACKB(2, 2),    /* MBOX_WAKE_UP */
  85         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  86         PACKB(4, 4),    /* MBOX_ABORT */
  87         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  88         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  89         PACKB(2, 2),    /* MBOX_BUS_RESET */
  90         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  91         PACKB(2, 3),    /* MBOX_START_QUEUE */
  92         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  93         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  94         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  95         PACKB(0, 0),    /* 0x001e */
  96         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  97         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  98         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
  99         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
 100         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
 101         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
 102         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
 103         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
 104         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
 105         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
 106         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
 107         PACKB(0, 0),    /* 0x002a */
 108         PACKB(0, 0),    /* 0x002b */
 109         PACKB(0, 0),    /* 0x002c */
 110         PACKB(0, 0),    /* 0x002d */
 111         PACKB(0, 0),    /* 0x002e */
 112         PACKB(0, 0),    /* 0x002f */
 113         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 114         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 115         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 116         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 117         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 118         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 119         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 120         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 121         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 122         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 123         PACKB(0, 0),    /* 0x003a */
 124         PACKB(0, 0),    /* 0x003b */
 125         PACKB(0, 0),    /* 0x003c */
 126         PACKB(0, 0),    /* 0x003d */
 127         PACKB(0, 0),    /* 0x003e */
 128         PACKB(0, 0),    /* 0x003f */
 129         PACKB(0, 0),    /* 0x0040 */
 130         PACKB(0, 0),    /* 0x0041 */
 131         PACKB(0, 0)     /* 0x0042 */
 132 };
 133
 134 #define MAX_MBOX_COMMAND        (sizeof(mbox_param)/sizeof(u_short))
 135
 136 /* queue length's _must_ be power of two: */
 137 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 138 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 139                                                     QLOGICPTI_REQ_QUEUE_LEN)
 140 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 141
 142 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 143 {
 144         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 145                     qpti->qregs + SBUS_CTRL);
 146 }
 147
 148 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 149 {
 150         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 151 }
 152
 153 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 154 {
 155         u16 val;
 156         u8 bursts = qpti->bursts;
 157
 158 #if 0   /* It appears that at least PTI cards do not support
 159          * 64-byte bursts and that setting the B64 bit actually
 160          * is a nop and the chip ends up using the smallest burst
 161          * size. -DaveM
 162          */
 163         if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) {
 164                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 165         } else
 166 #endif
 167         if (bursts & DMA_BURST32) {
 168                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 169         } else if (bursts & DMA_BURST16) {
 170                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 171         } else if (bursts & DMA_BURST8) {
 172                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 173         } else {
 174                 val = 0; /* No sbus bursts for you... */
 175         }
 176         sbus_writew(val, qpti->qregs + SBUS_CFG1);
 177 }
 178
 179 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 180 {
 181         int loop_count;
 182         u16 tmp;
 183
 184         if (mbox_param[param[0]] == 0)
 185                 return 1;
 186
 187         /* Set SBUS semaphore. */
 188         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 189         tmp |= SBUS_SEMAPHORE_LCK;
 190         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 191
 192         /* Wait for host IRQ bit to clear. */
 193         loop_count = DEFAULT_LOOP_COUNT;
 194         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 195                 barrier();
 196                 cpu_relax();
 197         }
 198         if (!loop_count)
 199                 printk(KERN_EMERG "qlogicpti: mbox_command loop timeout #1\n");
 200
 201         /* Write mailbox command registers. */
 202         switch (mbox_param[param[0]] >> 4) {
 203         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 204         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 205         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 206         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 207         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 208         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 209         }
 210
 211         /* Clear RISC interrupt. */
 212         tmp = sbus_readw(qpti->qregs + HCCTRL);
 213         tmp |= HCCTRL_CRIRQ;
 214         sbus_writew(tmp, qpti->qregs + HCCTRL);
 215
 216         /* Clear SBUS semaphore. */
 217         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 218
 219         /* Set HOST interrupt. */
 220         tmp = sbus_readw(qpti->qregs + HCCTRL);
 221         tmp |= HCCTRL_SHIRQ;
 222         sbus_writew(tmp, qpti->qregs + HCCTRL);
 223
 224         /* Wait for HOST interrupt clears. */
 225         loop_count = DEFAULT_LOOP_COUNT;
 226         while (--loop_count &&
 227                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 228                 udelay(20);
 229         if (!loop_count)
 230                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #2\n",
 231                        param[0]);
 232
 233         /* Wait for SBUS semaphore to get set. */
 234         loop_count = DEFAULT_LOOP_COUNT;
 235         while (--loop_count &&
 236                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 237                 udelay(20);
 238
 239                 /* Workaround for some buggy chips. */
 240                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 241                         break;
 242         }
 243         if (!loop_count)
 244                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #3\n",
 245                        param[0]);
 246
 247         /* Wait for MBOX busy condition to go away. */
 248         loop_count = DEFAULT_LOOP_COUNT;
 249         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 250                 udelay(20);
 251         if (!loop_count)
 252                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #4\n",
 253                        param[0]);
 254
 255         /* Read back output parameters. */
 256         switch (mbox_param[param[0]] & 0xf) {
 257         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 258         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 259         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 260         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 261         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 262         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 263         }
 264
 265         /* Clear RISC interrupt. */
 266         tmp = sbus_readw(qpti->qregs + HCCTRL);
 267         tmp |= HCCTRL_CRIRQ;
 268         sbus_writew(tmp, qpti->qregs + HCCTRL);
 269
 270         /* Release SBUS semaphore. */
 271         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 272         tmp &= ~(SBUS_SEMAPHORE_LCK);
 273         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 274
 275         /* We're done. */
 276         return 0;
 277 }
 278
 279 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 280 {
 281         int i;
 282
 283         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 284         qpti->host_param.bus_reset_delay = 3;
 285         qpti->host_param.retry_count = 0;
 286         qpti->host_param.retry_delay = 5;
 287         qpti->host_param.async_data_setup_time = 3;
 288         qpti->host_param.req_ack_active_negation = 1;
 289         qpti->host_param.data_line_active_negation = 1;
 290         qpti->host_param.data_dma_burst_enable = 1;
 291         qpti->host_param.command_dma_burst_enable = 1;
 292         qpti->host_param.tag_aging = 8;
 293         qpti->host_param.selection_timeout = 250;
 294         qpti->host_param.max_queue_depth = 256;
 295
 296         for(i = 0; i < MAX_TARGETS; i++) {
 297                 /*
 298                  * disconnect, parity, arq, reneg on reset, and, oddly enough
 299                  * tags...the midlayer's notion of tagged support has to match
 300                  * our device settings, and since we base whether we enable a
 301                  * tag on a  per-cmnd basis upon what the midlayer sez, we
 302                  * actually enable the capability here.
 303                  */
 304                 qpti->dev_param[i].device_flags = 0xcd;
 305                 qpti->dev_param[i].execution_throttle = 16;
 306                 if (qpti->ultra) {
 307                         qpti->dev_param[i].synchronous_period = 12;
 308                         qpti->dev_param[i].synchronous_offset = 8;
 309                 } else {
 310                         qpti->dev_param[i].synchronous_period = 25;
 311                         qpti->dev_param[i].synchronous_offset = 12;
 312                 }
 313                 qpti->dev_param[i].device_enable = 1;
 314         }
 315         /* this is very important to set! */
 316         qpti->sbits = 1 << qpti->scsi_id;
 317 }
 318
 319 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 320 {
 321         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 322         u_short param[6];
 323         unsigned short risc_code_addr;
 324         int loop_count, i;
 325         unsigned long flags;
 326
 327         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 328
 329         spin_lock_irqsave(host->host_lock, flags);
 330
 331         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 332
 333         /* Only reset the scsi bus if it is not free. */
 334         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 335                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 336                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 337                 udelay(400);
 338         }
 339
 340         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 341         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 342         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 343
 344         loop_count = DEFAULT_LOOP_COUNT;
 345         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 346                 udelay(20);
 347         if (!loop_count)
 348                 printk(KERN_EMERG "qlogicpti: reset_hardware loop timeout\n");
 349
 350         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 351         set_sbus_cfg1(qpti);
 352         qlogicpti_enable_irqs(qpti);
 353
 354         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 355                 qpti->ultra = 1;
 356                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 357                             qpti->qregs + RISC_MTREG);
 358         } else {
 359                 qpti->ultra = 0;
 360                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 361                             qpti->qregs + RISC_MTREG);
 362         }
 363
 364         /* reset adapter and per-device default values. */
 365         /* do it after finding out whether we're ultra mode capable */
 366         qlogicpti_set_hostdev_defaults(qpti);
 367
 368         /* Release the RISC processor. */
 369         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 370
 371         /* Get RISC to start executing the firmware code. */
 372         param[0] = MBOX_EXEC_FIRMWARE;
 373         param[1] = risc_code_addr;
 374         if (qlogicpti_mbox_command(qpti, param, 1)) {
 375                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 376                        qpti->qpti_id);
 377                 spin_unlock_irqrestore(host->host_lock, flags);
 378                 return 1;
 379         }
 380
 381         /* Set initiator scsi ID. */
 382         param[0] = MBOX_SET_INIT_SCSI_ID;
 383         param[1] = qpti->host_param.initiator_scsi_id;
 384         if (qlogicpti_mbox_command(qpti, param, 1) ||
 385            (param[0] != MBOX_COMMAND_COMPLETE)) {
 386                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 387                        qpti->qpti_id);
 388                 spin_unlock_irqrestore(host->host_lock, flags);
 389                 return 1;
 390         }
 391
 392         /* Initialize state of the queues, both hw and sw. */
 393         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 394
 395         param[0] = MBOX_INIT_RES_QUEUE;
 396         param[1] = RES_QUEUE_LEN + 1;
 397         param[2] = (u_short) (qpti->res_dvma >> 16);
 398         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 399         param[4] = param[5] = 0;
 400         if (qlogicpti_mbox_command(qpti, param, 1)) {
 401                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 402                        qpti->qpti_id);
 403                 spin_unlock_irqrestore(host->host_lock, flags);
 404                 return 1;
 405         }
 406
 407         param[0] = MBOX_INIT_REQ_QUEUE;
 408         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 409         param[2] = (u_short) (qpti->req_dvma >> 16);
 410         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 411         param[4] = param[5] = 0;
 412         if (qlogicpti_mbox_command(qpti, param, 1)) {
 413                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 414                        qpti->qpti_id);
 415                 spin_unlock_irqrestore(host->host_lock, flags);
 416                 return 1;
 417         }
 418
 419         param[0] = MBOX_SET_RETRY_COUNT;
 420         param[1] = qpti->host_param.retry_count;
 421         param[2] = qpti->host_param.retry_delay;
 422         qlogicpti_mbox_command(qpti, param, 0);
 423
 424         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 425         param[1] = qpti->host_param.tag_aging;
 426         qlogicpti_mbox_command(qpti, param, 0);
 427
 428         for (i = 0; i < MAX_TARGETS; i++) {
 429                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 430                 param[1] = (i << 8);
 431                 qlogicpti_mbox_command(qpti, param, 0);
 432         }
 433
 434         param[0] = MBOX_GET_FIRMWARE_STATUS;
 435         qlogicpti_mbox_command(qpti, param, 0);
 436
 437         param[0] = MBOX_SET_SELECT_TIMEOUT;
 438         param[1] = qpti->host_param.selection_timeout;
 439         qlogicpti_mbox_command(qpti, param, 0);
 440
 441         for (i = 0; i < MAX_TARGETS; i++) {
 442                 param[0] = MBOX_SET_TARGET_PARAMS;
 443                 param[1] = (i << 8);
 444                 param[2] = (qpti->dev_param[i].device_flags << 8);
 445                 /*
 446                  * Since we're now loading 1.31 f/w, force narrow/async.
 447                  */
 448                 param[2] |= 0xc0;
 449                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 450                 qlogicpti_mbox_command(qpti, param, 0);
 451         }
 452
 453         /*
 454          * Always (sigh) do an initial bus reset (kicks f/w).
 455          */
 456         param[0] = MBOX_BUS_RESET;
 457         param[1] = qpti->host_param.bus_reset_delay;
 458         qlogicpti_mbox_command(qpti, param, 0);
 459         qpti->send_marker = 1;
 460
 461         spin_unlock_irqrestore(host->host_lock, flags);
 462         return 0;
 463 }
 464
 465 #define PTI_RESET_LIMIT 400
 466
 467 static int __init qlogicpti_load_firmware(struct qlogicpti *qpti)
 468 {
 469         struct Scsi_Host *host = qpti->qhost;
 470         unsigned short csum = 0;
 471         unsigned short param[6];
 472         unsigned short *risc_code, risc_code_addr, risc_code_length;
 473         unsigned long flags;
 474         int i, timeout;
 475
 476         risc_code = &sbus_risc_code01[0];
 477         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 478         risc_code_length = sbus_risc_code_length01;
 479
 480         spin_lock_irqsave(host->host_lock, flags);
 481
 482         /* Verify the checksum twice, one before loading it, and once
 483          * afterwards via the mailbox commands.
 484          */
 485         for (i = 0; i < risc_code_length; i++)
 486                 csum += risc_code[i];
 487         if (csum) {
 488                 spin_unlock_irqrestore(host->host_lock, flags);
 489                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 490                        qpti->qpti_id);
 491                 return 1;
 492         }
 493         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 494         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 495         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 496         timeout = PTI_RESET_LIMIT;
 497         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 498                 udelay(20);
 499         if (!timeout) {
 500                 spin_unlock_irqrestore(host->host_lock, flags);
 501                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 502                 return 1;
 503         }
 504
 505         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 506         mdelay(1);
 507
 508         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 509         set_sbus_cfg1(qpti);
 510         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 511
 512         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 513                 qpti->ultra = 1;
 514                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 515                             qpti->qregs + RISC_MTREG);
 516         } else {
 517                 qpti->ultra = 0;
 518                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 519                             qpti->qregs + RISC_MTREG);
 520         }
 521
 522         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 523
 524         /* Pin lines are only stable while RISC is paused. */
 525         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 526         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 527                 qpti->differential = 1;
 528         else
 529                 qpti->differential = 0;
 530         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 531
 532         /* This shouldn't be necessary- we've reset things so we should be
 533            running from the ROM now.. */
 534
 535         param[0] = MBOX_STOP_FIRMWARE;
 536         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 537         if (qlogicpti_mbox_command(qpti, param, 1)) {
 538                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 539                        qpti->qpti_id);
 540                 spin_unlock_irqrestore(host->host_lock, flags);
 541                 return 1;
 542         }
 543
 544         /* Load it up.. */
 545         for (i = 0; i < risc_code_length; i++) {
 546                 param[0] = MBOX_WRITE_RAM_WORD;
 547                 param[1] = risc_code_addr + i;
 548                 param[2] = risc_code[i];
 549                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 550                     param[0] != MBOX_COMMAND_COMPLETE) {
 551                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 552                                qpti->qpti_id);
 553                         spin_unlock_irqrestore(host->host_lock, flags);
 554                         return 1;
 555                 }
 556         }
 557
 558         /* Reset the ISP again. */
 559         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 560         mdelay(1);
 561
 562         qlogicpti_enable_irqs(qpti);
 563         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 564         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 565
 566         /* Ask ISP to verify the checksum of the new code. */
 567         param[0] = MBOX_VERIFY_CHECKSUM;
 568         param[1] = risc_code_addr;
 569         if (qlogicpti_mbox_command(qpti, param, 1) ||
 570             (param[0] != MBOX_COMMAND_COMPLETE)) {
 571                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 572                        qpti->qpti_id);
 573                 spin_unlock_irqrestore(host->host_lock, flags);
 574                 return 1;
 575         }
 576
 577         /* Start using newly downloaded firmware. */
 578         param[0] = MBOX_EXEC_FIRMWARE;
 579         param[1] = risc_code_addr;
 580         qlogicpti_mbox_command(qpti, param, 1);
 581
 582         param[0] = MBOX_ABOUT_FIRMWARE;
 583         if (qlogicpti_mbox_command(qpti, param, 1) ||
 584             (param[0] != MBOX_COMMAND_COMPLETE)) {
 585                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 586                        qpti->qpti_id);
 587                 spin_unlock_irqrestore(host->host_lock, flags);
 588                 return 1;
 589         }
 590
 591         /* Snag the major and minor revisions from the result. */
 592         qpti->fware_majrev = param[1];
 593         qpti->fware_minrev = param[2];
 594         qpti->fware_micrev = param[3];
 595
 596         /* Set the clock rate */
 597         param[0] = MBOX_SET_CLOCK_RATE;
 598         param[1] = qpti->clock;
 599         if (qlogicpti_mbox_command(qpti, param, 1) ||
 600             (param[0] != MBOX_COMMAND_COMPLETE)) {
 601                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 602                        qpti->qpti_id);
 603                 spin_unlock_irqrestore(host->host_lock, flags);
 604                 return 1;
 605         }
 606
 607         if (qpti->is_pti != 0) {
 608                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 609                 param[0] = MBOX_WRITE_RAM_WORD;
 610                 param[1] = 0xff80;
 611                 param[2] = (unsigned short) qpti->scsi_id;
 612                 qlogicpti_mbox_command(qpti, param, 1);
 613
 614                 param[0] = MBOX_WRITE_RAM_WORD;
 615                 param[1] = 0xff00;
 616                 param[2] = (unsigned short) 3;
 617                 qlogicpti_mbox_command(qpti, param, 1);
 618         }
 619
 620         spin_unlock_irqrestore(host->host_lock, flags);
 621         return 0;
 622 }
 623
 624 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 625 {
 626         int curstat = sbus_readb(qpti->sreg);
 627
 628         curstat &= 0xf0;
 629         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 630                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 631         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 632                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 633         if (curstat != qpti->swsreg) {
 634                 int error = 0;
 635                 if (curstat & SREG_FUSE) {
 636                         error++;
 637                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 638                 }
 639                 if (curstat & SREG_TPOWER) {
 640                         error++;
 641                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 642                 }
 643                 if (qpti->differential &&
 644                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 645                         error++;
 646                         printk("qlogicpti%d: You have a single ended device on a "
 647                                "differential bus!  Please fix!\n", qpti->qpti_id);
 648                 }
 649                 qpti->swsreg = curstat;
 650                 return error;
 651         }
 652         return 0;
 653 }
 654
 655 static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs);
 656
 657 static void __init qpti_chain_add(struct qlogicpti *qpti)
 658 {
 659         spin_lock_irq(&qptichain_lock);
 660         if (qptichain != NULL) {
 661                 struct qlogicpti *qlink = qptichain;
 662
 663                 while(qlink->next)
 664                         qlink = qlink->next;
 665                 qlink->next = qpti;
 666         } else {
 667                 qptichain = qpti;
 668         }
 669         qpti->next = NULL;
 670         spin_unlock_irq(&qptichain_lock);
 671 }
 672
 673 static void __init qpti_chain_del(struct qlogicpti *qpti)
 674 {
 675         spin_lock_irq(&qptichain_lock);
 676         if (qptichain == qpti) {
 677                 qptichain = qpti->next;
 678         } else {
 679                 struct qlogicpti *qlink = qptichain;
 680                 while(qlink->next != qpti)
 681                         qlink = qlink->next;
 682                 qlink->next = qpti->next;
 683         }
 684         qpti->next = NULL;
 685         spin_unlock_irq(&qptichain_lock);
 686 }
 687
 688 static int __init qpti_map_regs(struct qlogicpti *qpti)
 689 {
 690         struct sbus_dev *sdev = qpti->sdev;
 691
 692         qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
 693                                    sdev->reg_addrs[0].reg_size,
 694                                    "PTI Qlogic/ISP");
 695         if (!qpti->qregs) {
 696                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 697                 return -1;
 698         }
 699         if (qpti->is_pti) {
 700                 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
 701                                           sizeof(unsigned char),
 702                                           "PTI Qlogic/ISP statreg");
 703                 if (!qpti->sreg) {
 704                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 705                         return -1;
 706                 }
 707         }
 708         return 0;
 709 }
 710
 711 static int __init qpti_register_irq(struct qlogicpti *qpti)
 712 {
 713         struct sbus_dev *sdev = qpti->sdev;
 714
 715         qpti->qhost->irq = qpti->irq = sdev->irqs[0];
 716
 717         /* We used to try various overly-clever things to
 718          * reduce the interrupt processing overhead on
 719          * sun4c/sun4m when multiple PTI's shared the
 720          * same IRQ.  It was too complex and messy to
 721          * sanely maintain.
 722          */
 723         if (request_irq(qpti->irq, qpti_intr,
 724                         SA_SHIRQ, "Qlogic/PTI", qpti))
 725                 goto fail;
 726
 727         printk("qpti%d: IRQ %s ", qpti->qpti_id, __irq_itoa(qpti->irq));
 728
 729         return 0;
 730
 731 fail:
 732         printk("qpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 733         return -1;
 734 }
 735
 736 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
 737 {
 738         qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 739                                            "initiator-id",
 740                                            -1);
 741         if (qpti->scsi_id == -1)
 742                 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 743                                                    "scsi-initiator-id",
 744                                                    -1);
 745         if (qpti->scsi_id == -1)
 746                 qpti->scsi_id =
 747                         prom_getintdefault(qpti->sdev->bus->prom_node,
 748                                            "scsi-initiator-id", 7);
 749         qpti->qhost->this_id = qpti->scsi_id;
 750         qpti->qhost->max_sectors = 64;
 751
 752         printk("SCSI ID %d ", qpti->scsi_id);
 753 }
 754
 755 static void qpti_get_bursts(struct qlogicpti *qpti)
 756 {
 757         struct sbus_dev *sdev = qpti->sdev;
 758         u8 bursts, bmask;
 759
 760         bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
 761         bmask = prom_getintdefault(sdev->bus->prom_node,
 762                                    "burst-sizes", 0xff);
 763         if (bmask != 0xff)
 764                 bursts &= bmask;
 765         if (bursts == 0xff ||
 766             (bursts & DMA_BURST16) == 0 ||
 767             (bursts & DMA_BURST32) == 0)
 768                 bursts = (DMA_BURST32 - 1);
 769
 770         qpti->bursts = bursts;
 771 }
 772
 773 static void qpti_get_clock(struct qlogicpti *qpti)
 774 {
 775         unsigned int cfreq;
 776
 777         /* Check for what the clock input to this card is.
 778          * Default to 40Mhz.
 779          */
 780         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 781         qpti->clock = (cfreq + 500000)/1000000;
 782         if (qpti->clock == 0) /* bullshit */
 783                 qpti->clock = 40;
 784 }
 785
 786 /* The request and response queues must each be aligned
 787  * on a page boundary.
 788  */
 789 static int __init qpti_map_queues(struct qlogicpti *qpti)
 790 {
 791         struct sbus_dev *sdev = qpti->sdev;
 792
 793 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 794         qpti->res_cpu = sbus_alloc_consistent(sdev,
 795                                               QSIZE(RES_QUEUE_LEN),
 796                                               &qpti->res_dvma);
 797         if (qpti->res_cpu == NULL ||
 798             qpti->res_dvma == 0) {
 799                 printk("QPTI: Cannot map response queue.\n");
 800                 return -1;
 801         }
 802
 803         qpti->req_cpu = sbus_alloc_consistent(sdev,
 804                                               QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 805                                               &qpti->req_dvma);
 806         if (qpti->req_cpu == NULL ||
 807             qpti->req_dvma == 0) {
 808                 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
 809                                      qpti->res_cpu, qpti->res_dvma);
 810                 printk("QPTI: Cannot map request queue.\n");
 811                 return -1;
 812         }
 813         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 814         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 815         return 0;
 816 }
 817
 818 /* Detect all PTI Qlogic ISP's in the machine. */
 819 static int __init qlogicpti_detect(struct scsi_host_template *tpnt)
 820 {
 821         struct qlogicpti *qpti;
 822         struct Scsi_Host *qpti_host;
 823         struct sbus_bus *sbus;
 824         struct sbus_dev *sdev;
 825         int nqptis = 0, nqptis_in_use = 0;
 826
 827         tpnt->proc_name = "qlogicpti";
 828         for_each_sbus(sbus) {
 829                 for_each_sbusdev(sdev, sbus) {
 830                         /* Is this a red snapper? */
 831                         if (strcmp(sdev->prom_name, "ptisp") &&
 832                             strcmp(sdev->prom_name, "PTI,ptisp") &&
 833                             strcmp(sdev->prom_name, "QLGC,isp") &&
 834                             strcmp(sdev->prom_name, "SUNW,isp"))
 835                                 continue;
 836
 837                         /* Sometimes Antares cards come up not completely
 838                          * setup, and we get a report of a zero IRQ.
 839                          * Skip over them in such cases so we survive.
 840                          */
 841                         if (sdev->irqs[0] == 0) {
 842                                 printk("qpti%d: Adapter reports no interrupt, "
 843                                        "skipping over this card.", nqptis);
 844                                 continue;
 845                         }
 846
 847                         /* Yep, register and allocate software state. */
 848                         qpti_host = scsi_register(tpnt, sizeof(struct qlogicpti));
 849                         if (!qpti_host) {
 850                                 printk("QPTI: Cannot register PTI Qlogic ISP SCSI host");
 851                                 continue;
 852                         }
 853                         qpti = (struct qlogicpti *) qpti_host->hostdata;
 854
 855                         /* We are wide capable, 16 targets. */
 856                         qpti_host->max_id = MAX_TARGETS;
 857
 858                         /* Setup back pointers and misc. state. */
 859                         qpti->qhost = qpti_host;
 860                         qpti->sdev = sdev;
 861                         qpti->qpti_id = nqptis++;
 862                         qpti->prom_node = sdev->prom_node;
 863                         prom_getstring(qpti->prom_node, "name",
 864                                        qpti->prom_name,
 865                                        sizeof(qpti->prom_name));
 866
 867                         /* This is not correct, actually. There's a switch
 868                          * on the PTI cards that put them into "emulation"
 869                          * mode- i.e., report themselves as QLGC,isp
 870                          * instead of PTI,ptisp. The only real substantive
 871                          * difference between non-pti and pti cards is
 872                          * the tmon register. Which is possibly even
 873                          * there for Qlogic cards, but non-functional.
 874                          */
 875                         qpti->is_pti = (strcmp (qpti->prom_name, "QLGC,isp") != 0);
 876
 877                         qpti_chain_add(qpti);
 878                         if (qpti_map_regs(qpti) < 0)
 879                                 goto fail_unlink;
 880
 881                         if (qpti_register_irq(qpti) < 0)
 882                                 goto fail_unmap_regs;
 883
 884                         qpti_get_scsi_id(qpti);
 885                         qpti_get_bursts(qpti);
 886                         qpti_get_clock(qpti);
 887
 888                         /* Clear out scsi_cmnd array. */
 889                         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
 890
 891                         if (qpti_map_queues(qpti) < 0)
 892                                 goto fail_free_irq;
 893
 894                         /* Load the firmware. */
 895                         if (qlogicpti_load_firmware(qpti))
 896                                 goto fail_unmap_queues;
 897                         if (qpti->is_pti) {
 898                                 /* Check the PTI status reg. */
 899                                 if (qlogicpti_verify_tmon(qpti))
 900                                         goto fail_unmap_queues;
 901                         }
 902
 903                         /* Reset the ISP and init res/req queues. */
 904                         if (qlogicpti_reset_hardware(qpti_host))
 905                                 goto fail_unmap_queues;
 906
 907                         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
 908                             qpti->fware_minrev, qpti->fware_micrev);
 909                         {
 910                                 char buffer[60];
 911
 912                                 prom_getstring (qpti->prom_node,
 913                                                 "isp-fcode", buffer, 60);
 914                                 if (buffer[0])
 915                                         printk("(Firmware %s)", buffer);
 916                                 if (prom_getbool(qpti->prom_node, "differential"))
 917                                         qpti->differential = 1;
 918                         }
 919
 920                         printk (" [%s Wide, using %s interface]\n",
 921                                (qpti->ultra ? "Ultra" : "Fast"),
 922                                (qpti->differential ? "differential" : "single ended"));
 923
 924                         nqptis_in_use++;
 925                         continue;
 926
 927                 fail_unmap_queues:
 928 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 929                         sbus_free_consistent(qpti->sdev,
 930                                              QSIZE(RES_QUEUE_LEN),
 931                                              qpti->res_cpu, qpti->res_dvma);
 932                         sbus_free_consistent(qpti->sdev,
 933                                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 934                                              qpti->req_cpu, qpti->req_dvma);
 935 #undef QSIZE
 936                 fail_free_irq:
 937                         free_irq(qpti->irq, qpti);
 938
 939                 fail_unmap_regs:
 940                         sbus_iounmap(qpti->qregs,
 941                                      qpti->sdev->reg_addrs[0].reg_size);
 942                         if (qpti->is_pti)
 943                                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
 944                 fail_unlink:
 945                         qpti_chain_del(qpti);
 946                         scsi_unregister(qpti->qhost);
 947                 }
 948         }
 949         if (nqptis)
 950                 printk("QPTI: Total of %d PTI Qlogic/ISP hosts found, %d actually in use.\n",
 951                        nqptis, nqptis_in_use);
 952         qptis_running = nqptis_in_use;
 953         return nqptis;
 954 }
 955
 956 static int qlogicpti_release(struct Scsi_Host *host)
 957 {
 958         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 959
 960         /* Remove visibility from IRQ handlers. */
 961         qpti_chain_del(qpti);
 962
 963         /* Shut up the card. */
 964         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 965
 966         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
 967         free_irq(qpti->irq, qpti);
 968
 969 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 970         sbus_free_consistent(qpti->sdev,
 971                              QSIZE(RES_QUEUE_LEN),
 972                              qpti->res_cpu, qpti->res_dvma);
 973         sbus_free_consistent(qpti->sdev,
 974                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 975                              qpti->req_cpu, qpti->req_dvma);
 976 #undef QSIZE
 977
 978         sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
 979         if (qpti->is_pti)
 980                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
 981
 982         return 0;
 983 }
 984
 985 const char *qlogicpti_info(struct Scsi_Host *host)
 986 {
 987         static char buf[80];
 988         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 989
 990         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %s regs at %p",
 991                 __irq_itoa(qpti->qhost->irq), qpti->qregs);
 992         return buf;
 993 }
 994
 995 /* I am a certified frobtronicist. */
 996 static inline void marker_frob(struct Command_Entry *cmd)
 997 {
 998         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 999
1000         memset(marker, 0, sizeof(struct Marker_Entry));
1001         marker->hdr.entry_cnt = 1;
1002         marker->hdr.entry_type = ENTRY_MARKER;
1003         marker->modifier = SYNC_ALL;
1004         marker->rsvd = 0;
1005 }
1006
1007 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
1008                             struct qlogicpti *qpti)
1009 {
1010         memset(cmd, 0, sizeof(struct Command_Entry));
1011         cmd->hdr.entry_cnt = 1;
1012         cmd->hdr.entry_type = ENTRY_COMMAND;
1013         cmd->target_id = Cmnd->device->id;
1014         cmd->target_lun = Cmnd->device->lun;
1015         cmd->cdb_length = Cmnd->cmd_len;
1016         cmd->control_flags = 0;
1017         if (Cmnd->device->tagged_supported) {
1018                 if (qpti->cmd_count[Cmnd->device->id] == 0)
1019                         qpti->tag_ages[Cmnd->device->id] = jiffies;
1020                 if ((jiffies - qpti->tag_ages[Cmnd->device->id]) > (5*HZ)) {
1021                         cmd->control_flags = CFLAG_ORDERED_TAG;
1022                         qpti->tag_ages[Cmnd->device->id] = jiffies;
1023                 } else
1024                         cmd->control_flags = CFLAG_SIMPLE_TAG;
1025         }
1026         if ((Cmnd->cmnd[0] == WRITE_6) ||
1027             (Cmnd->cmnd[0] == WRITE_10) ||
1028             (Cmnd->cmnd[0] == WRITE_12))
1029                 cmd->control_flags |= CFLAG_WRITE;
1030         else
1031                 cmd->control_flags |= CFLAG_READ;
1032         cmd->time_out = 30;
1033         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
1034 }
1035
1036 /* Do it to it baby. */
1037 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
1038                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
1039 {
1040         struct dataseg *ds;
1041         struct scatterlist *sg;
1042         int i, n;
1043
1044         if (Cmnd->use_sg) {
1045                 int sg_count;
1046
1047                 sg = (struct scatterlist *) Cmnd->buffer;
1048                 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
1049
1050                 ds = cmd->dataseg;
1051                 cmd->segment_cnt = sg_count;
1052
1053                 /* Fill in first four sg entries: */
1054                 n = sg_count;
1055                 if (n > 4)
1056                         n = 4;
1057                 for (i = 0; i < n; i++, sg++) {
1058                         ds[i].d_base = sg_dma_address(sg);
1059                         ds[i].d_count = sg_dma_len(sg);
1060                 }
1061                 sg_count -= 4;
1062                 while (sg_count > 0) {
1063                         struct Continuation_Entry *cont;
1064
1065                         ++cmd->hdr.entry_cnt;
1066                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
1067                         in_ptr = NEXT_REQ_PTR(in_ptr);
1068                         if (in_ptr == out_ptr)
1069                                 return -1;
1070
1071                         cont->hdr.entry_type = ENTRY_CONTINUATION;
1072                         cont->hdr.entry_cnt = 0;
1073                         cont->hdr.sys_def_1 = 0;
1074                         cont->hdr.flags = 0;
1075                         cont->reserved = 0;
1076                         ds = cont->dataseg;
1077                         n = sg_count;
1078                         if (n > 7)
1079                                 n = 7;
1080                         for (i = 0; i < n; i++, sg++) {
1081                                 ds[i].d_base = sg_dma_address(sg);
1082                                 ds[i].d_count = sg_dma_len(sg);
1083                         }
1084                         sg_count -= n;
1085                 }
1086         } else if (Cmnd->request_bufflen) {
1087                 Cmnd->SCp.ptr = (char *)(unsigned long)
1088                         sbus_map_single(qpti->sdev,
1089                                         Cmnd->request_buffer,
1090                                         Cmnd->request_bufflen,
1091                                         Cmnd->sc_data_direction);
1092
1093                 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
1094                 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
1095                 cmd->segment_cnt = 1;
1096         } else {
1097                 cmd->dataseg[0].d_base = 0;
1098                 cmd->dataseg[0].d_count = 0;
1099                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
1100         }
1101
1102         /* Committed, record Scsi_Cmd so we can find it later. */
1103         cmd->handle = in_ptr;
1104         qpti->cmd_slots[in_ptr] = Cmnd;
1105
1106         qpti->cmd_count[Cmnd->device->id]++;
1107         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1108         qpti->req_in_ptr = in_ptr;
1109
1110         return in_ptr;
1111 }
1112
1113 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
1114 {
1115         /* Temporary workaround until bug is found and fixed (one bug has been found
1116            already, but fixing it makes things even worse) -jj */
1117         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
1118         host->can_queue = host->host_busy + num_free;
1119         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
1120 }
1121
1122 static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
1123 {
1124         unsigned char *buf;
1125         unsigned int buflen;
1126
1127         if (cmd->use_sg) {
1128                 struct scatterlist *sg;
1129
1130                 sg = (struct scatterlist *) cmd->request_buffer;
1131                 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1132                 buflen = sg->length;
1133         } else {
1134                 buf = cmd->request_buffer;
1135                 buflen = cmd->request_bufflen;
1136         }
1137
1138         *buf_out = buf;
1139         return buflen;
1140 }
1141
1142 static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
1143 {
1144         if (cmd->use_sg) {
1145                 struct scatterlist *sg;
1146
1147                 sg = (struct scatterlist *) cmd->request_buffer;
1148                 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1149         }
1150 }
1151
1152 /*
1153  * Until we scan the entire bus with inquiries, go throught this fella...
1154  */
1155 static void ourdone(struct scsi_cmnd *Cmnd)
1156 {
1157         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1158         int tgt = Cmnd->device->id;
1159         void (*done) (struct scsi_cmnd *);
1160
1161         /* This grot added by DaveM, blame him for ugliness.
1162          * The issue is that in the 2.3.x driver we use the
1163          * host_scribble portion of the scsi command as a
1164          * completion linked list at interrupt service time,
1165          * so we have to store the done function pointer elsewhere.
1166          */
1167         done = (void (*)(struct scsi_cmnd *))
1168                 (((unsigned long) Cmnd->SCp.Message)
1169 #ifdef __sparc_v9__
1170                  | ((unsigned long) Cmnd->SCp.Status << 32UL)
1171 #endif
1172                  );
1173
1174         if ((qpti->sbits & (1 << tgt)) == 0) {
1175                 int ok = host_byte(Cmnd->result) == DID_OK;
1176                 if (Cmnd->cmnd[0] == 0x12 && ok) {
1177                         unsigned char *iqd;
1178                         unsigned int iqd_len;
1179
1180                         iqd_len = scsi_rbuf_get(Cmnd, &iqd);
1181
1182                         /* tags handled in midlayer */
1183                         /* enable sync mode? */
1184                         if (iqd[7] & 0x10) {
1185                                 qpti->dev_param[tgt].device_flags |= 0x10;
1186                         } else {
1187                                 qpti->dev_param[tgt].synchronous_offset = 0;
1188                                 qpti->dev_param[tgt].synchronous_period = 0;
1189                         }
1190                         /* are we wide capable? */
1191                         if (iqd[7] & 0x20) {
1192                                 qpti->dev_param[tgt].device_flags |= 0x20;
1193                         }
1194
1195                         scsi_rbuf_put(Cmnd, iqd);
1196
1197                         qpti->sbits |= (1 << tgt);
1198                 } else if (!ok) {
1199                         qpti->sbits |= (1 << tgt);
1200                 }
1201         }
1202         done(Cmnd);
1203 }
1204
1205 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
1206
1207 static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
1208                                        void (*done)(struct scsi_cmnd *))
1209 {
1210         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1211
1212         /*
1213          * done checking this host adapter?
1214          * If not, then rewrite the command
1215          * to finish through ourdone so we
1216          * can peek at Inquiry data results.
1217          */
1218         if (qpti->sbits && qpti->sbits != 0xffff) {
1219                 /* See above about in ourdone this ugliness... */
1220                 Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
1221 #ifdef CONFIG_SPARC64
1222                 Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
1223 #endif
1224                 return qlogicpti_queuecommand(Cmnd, ourdone);
1225         }
1226
1227         /*
1228          * We've peeked at all targets for this bus- time
1229          * to set parameters for devices for real now.
1230          */
1231         if (qpti->sbits == 0xffff) {
1232                 int i;
1233                 for(i = 0; i < MAX_TARGETS; i++) {
1234                         u_short param[6];
1235                         param[0] = MBOX_SET_TARGET_PARAMS;
1236                         param[1] = (i << 8);
1237                         param[2] = (qpti->dev_param[i].device_flags << 8);
1238                         if (qpti->dev_param[i].device_flags & 0x10) {
1239                                 param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
1240                                         qpti->dev_param[i].synchronous_period;
1241                         } else {
1242                                 param[3] = 0;
1243                         }
1244                         (void) qlogicpti_mbox_command(qpti, param, 0);
1245                 }
1246                 /*
1247                  * set to zero so any traverse through ourdone
1248                  * doesn't start the whole process again,
1249                  */
1250                 qpti->sbits = 0;
1251         }
1252
1253         /* check to see if we're done with all adapters... */
1254         for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
1255                 if (qpti->sbits) {
1256                         break;
1257                 }
1258         }
1259
1260         /*
1261          * if we hit the end of the chain w/o finding adapters still
1262          * capability-configuring, then we're done with all adapters
1263          * and can rock on..
1264          */
1265         if (qpti == NULL)
1266                 Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
1267
1268         return qlogicpti_queuecommand(Cmnd, done);
1269 }
1270
1271 /*
1272  * The middle SCSI layer ensures that queuecommand never gets invoked
1273  * concurrently with itself or the interrupt handler (though the
1274  * interrupt handler may call this routine as part of
1275  * request-completion handling).
1276  *
1277  * "This code must fly." -davem
1278  */
1279 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1280 {
1281         struct Scsi_Host *host = Cmnd->device->host;
1282         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1283         struct Command_Entry *cmd;
1284         u_int out_ptr;
1285         int in_ptr;
1286
1287         Cmnd->scsi_done = done;
1288
1289         in_ptr = qpti->req_in_ptr;
1290         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1291         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1292         in_ptr = NEXT_REQ_PTR(in_ptr);
1293         if (in_ptr == out_ptr)
1294                 goto toss_command;
1295
1296         if (qpti->send_marker) {
1297                 marker_frob(cmd);
1298                 qpti->send_marker = 0;
1299                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1300                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1301                         qpti->req_in_ptr = in_ptr;
1302                         goto toss_command;
1303                 }
1304                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1305                 in_ptr = NEXT_REQ_PTR(in_ptr);
1306         }
1307         cmd_frob(cmd, Cmnd, qpti);
1308         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1309                 goto toss_command;
1310
1311         update_can_queue(host, in_ptr, out_ptr);
1312
1313         return 0;
1314
1315 toss_command:
1316         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1317                qpti->qpti_id);
1318
1319         /* Unfortunately, unless you use the new EH code, which
1320          * we don't, the midlayer will ignore the return value,
1321          * which is insane.  We pick up the pieces like this.
1322          */
1323         Cmnd->result = DID_BUS_BUSY;
1324         done(Cmnd);
1325         return 1;
1326 }
1327
1328 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1329 {
1330         int host_status = DID_ERROR;
1331
1332         switch (sts->completion_status) {
1333               case CS_COMPLETE:
1334                 host_status = DID_OK;
1335                 break;
1336               case CS_INCOMPLETE:
1337                 if (!(sts->state_flags & SF_GOT_BUS))
1338                         host_status = DID_NO_CONNECT;
1339                 else if (!(sts->state_flags & SF_GOT_TARGET))
1340                         host_status = DID_BAD_TARGET;
1341                 else if (!(sts->state_flags & SF_SENT_CDB))
1342                         host_status = DID_ERROR;
1343                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1344                         host_status = DID_ERROR;
1345                 else if (!(sts->state_flags & SF_GOT_STATUS))
1346                         host_status = DID_ERROR;
1347                 else if (!(sts->state_flags & SF_GOT_SENSE))
1348                         host_status = DID_ERROR;
1349                 break;
1350               case CS_DMA_ERROR:
1351               case CS_TRANSPORT_ERROR:
1352                 host_status = DID_ERROR;
1353                 break;
1354               case CS_RESET_OCCURRED:
1355               case CS_BUS_RESET:
1356                 host_status = DID_RESET;
1357                 break;
1358               case CS_ABORTED:
1359                 host_status = DID_ABORT;
1360                 break;
1361               case CS_TIMEOUT:
1362                 host_status = DID_TIME_OUT;
1363                 break;
1364               case CS_DATA_OVERRUN:
1365               case CS_COMMAND_OVERRUN:
1366               case CS_STATUS_OVERRUN:
1367               case CS_BAD_MESSAGE:
1368               case CS_NO_MESSAGE_OUT:
1369               case CS_EXT_ID_FAILED:
1370               case CS_IDE_MSG_FAILED:
1371               case CS_ABORT_MSG_FAILED:
1372               case CS_NOP_MSG_FAILED:
1373               case CS_PARITY_ERROR_MSG_FAILED:
1374               case CS_DEVICE_RESET_MSG_FAILED:
1375               case CS_ID_MSG_FAILED:
1376               case CS_UNEXP_BUS_FREE:
1377                 host_status = DID_ERROR;
1378                 break;
1379               case CS_DATA_UNDERRUN:
1380                 host_status = DID_OK;
1381                 break;
1382               default:
1383                 printk(KERN_EMERG "qpti%d: unknown completion status 0x%04x\n",
1384                        id, sts->completion_status);
1385                 host_status = DID_ERROR;
1386                 break;
1387         }
1388
1389         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1390 }
1391
1392 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1393 {
1394         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1395         struct Status_Entry *sts;
1396         u_int in_ptr, out_ptr;
1397
1398         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1399                 return NULL;
1400
1401         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1402         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1403         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1404                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1405                 case ASYNC_SCSI_BUS_RESET:
1406                 case EXECUTION_TIMEOUT_RESET:
1407                         qpti->send_marker = 1;
1408                         break;
1409                 case INVALID_COMMAND:
1410                 case HOST_INTERFACE_ERROR:
1411                 case COMMAND_ERROR:
1412                 case COMMAND_PARAM_ERROR:
1413                         break;
1414                 };
1415                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1416         }
1417
1418         /* This looks like a network driver! */
1419         out_ptr = qpti->res_out_ptr;
1420         while (out_ptr != in_ptr) {
1421                 u_int cmd_slot;
1422
1423                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1424                 out_ptr = NEXT_RES_PTR(out_ptr);
1425
1426                 /* We store an index in the handle, not the pointer in
1427                  * some form.  This avoids problems due to the fact
1428                  * that the handle provided is only 32-bits. -DaveM
1429                  */
1430                 cmd_slot = sts->handle;
1431                 Cmnd = qpti->cmd_slots[cmd_slot];
1432                 qpti->cmd_slots[cmd_slot] = NULL;
1433
1434                 if (sts->completion_status == CS_RESET_OCCURRED ||
1435                     sts->completion_status == CS_ABORTED ||
1436                     (sts->status_flags & STF_BUS_RESET))
1437                         qpti->send_marker = 1;
1438
1439                 if (sts->state_flags & SF_GOT_SENSE)
1440                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1441                                sizeof(Cmnd->sense_buffer));
1442
1443                 if (sts->hdr.entry_type == ENTRY_STATUS)
1444                         Cmnd->result =
1445                             qlogicpti_return_status(sts, qpti->qpti_id);
1446                 else
1447                         Cmnd->result = DID_ERROR << 16;
1448
1449                 if (Cmnd->use_sg) {
1450                         sbus_unmap_sg(qpti->sdev,
1451                                       (struct scatterlist *)Cmnd->buffer,
1452                                       Cmnd->use_sg,
1453                                       Cmnd->sc_data_direction);
1454                 } else {
1455                         sbus_unmap_single(qpti->sdev,
1456                                           (__u32)((unsigned long)Cmnd->SCp.ptr),
1457                                           Cmnd->request_bufflen,
1458                                           Cmnd->sc_data_direction);
1459                 }
1460                 qpti->cmd_count[Cmnd->device->id]--;
1461                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1462                 Cmnd->host_scribble = (unsigned char *) done_queue;
1463                 done_queue = Cmnd;
1464         }
1465         qpti->res_out_ptr = out_ptr;
1466
1467         return done_queue;
1468 }
1469
1470 static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs)
1471 {
1472         struct qlogicpti *qpti = dev_id;
1473         unsigned long flags;
1474         struct scsi_cmnd *dq;
1475
1476         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1477         dq = qlogicpti_intr_handler(qpti);
1478
1479         if (dq != NULL) {
1480                 do {
1481                         struct scsi_cmnd *next;
1482
1483                         next = (struct scsi_cmnd *) dq->host_scribble;
1484                         dq->scsi_done(dq);
1485                         dq = next;
1486                 } while (dq != NULL);
1487         }
1488         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1489
1490         return IRQ_HANDLED;
1491 }
1492
1493 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1494 {
1495         u_short param[6];
1496         struct Scsi_Host *host = Cmnd->device->host;
1497         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1498         int return_status = SUCCESS;
1499         u32 cmd_cookie;
1500         int i;
1501
1502         printk(KERN_WARNING "qlogicpti : Aborting cmd for tgt[%d] lun[%d]\n",
1503                (int)Cmnd->device->id, (int)Cmnd->device->lun);
1504
1505         qlogicpti_disable_irqs(qpti);
1506
1507         /* Find the 32-bit cookie we gave to the firmware for
1508          * this command.
1509          */
1510         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1511                 if (qpti->cmd_slots[i] == Cmnd)
1512                         break;
1513         cmd_cookie = i;
1514
1515         param[0] = MBOX_ABORT;
1516         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1517         param[2] = cmd_cookie >> 16;
1518         param[3] = cmd_cookie & 0xffff;
1519         if (qlogicpti_mbox_command(qpti, param, 0) ||
1520             (param[0] != MBOX_COMMAND_COMPLETE)) {
1521                 printk(KERN_EMERG "qlogicpti : scsi abort failure: %x\n", param[0]);
1522                 return_status = FAILED;
1523         }
1524
1525         qlogicpti_enable_irqs(qpti);
1526
1527         return return_status;
1528 }
1529
1530 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1531 {
1532         u_short param[6];
1533         struct Scsi_Host *host = Cmnd->device->host;
1534         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1535         int return_status = SUCCESS;
1536
1537         printk(KERN_WARNING "qlogicpti : Resetting SCSI bus!\n");
1538
1539         qlogicpti_disable_irqs(qpti);
1540
1541         param[0] = MBOX_BUS_RESET;
1542         param[1] = qpti->host_param.bus_reset_delay;
1543         if (qlogicpti_mbox_command(qpti, param, 0) ||
1544            (param[0] != MBOX_COMMAND_COMPLETE)) {
1545                 printk(KERN_EMERG "qlogicisp : scsi bus reset failure: %x\n", param[0]);
1546                 return_status = FAILED;
1547         }
1548
1549         qlogicpti_enable_irqs(qpti);
1550
1551         return return_status;
1552 }
1553
1554 static struct scsi_host_template driver_template = {
1555         .detect                 = qlogicpti_detect,
1556         .release                = qlogicpti_release,
1557         .info                   = qlogicpti_info,
1558         .queuecommand           = qlogicpti_queuecommand_slow,
1559         .eh_abort_handler       = qlogicpti_abort,
1560         .eh_bus_reset_handler   = qlogicpti_reset,
1561         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1562         .this_id                = 7,
1563         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1564         .cmd_per_lun            = 1,
1565         .use_clustering         = ENABLE_CLUSTERING,
1566 };
1567
1568
1569 #include "scsi_module.c"
1570
1571 MODULE_LICENSE("GPL");
1572