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/blk.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/init.h>
  24 #include <linux/spinlock.h>
  25
  26 #include <asm/byteorder.h>
  27
  28 #include "scsi.h"
  29 #include "hosts.h"
  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 <linux/module.h>
  42
  43 #define MAX_TARGETS     16
  44 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
  45
  46 #define DEFAULT_LOOP_COUNT      10000
  47
  48 #include "qlogicpti_asm.c"
  49
  50 static struct qlogicpti *qptichain = NULL;
  51 static spinlock_t qptichain_lock = SPIN_LOCK_UNLOCKED;
  52 static int qptis_running = 0;
  53
  54 #define PACKB(a, b)                     (((a)<<4)|(b))
  55
  56 static const u_char mbox_param[] = {
  57         PACKB(1, 1),    /* MBOX_NO_OP */
  58         PACKB(5, 5),    /* MBOX_LOAD_RAM */
  59         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  60         PACKB(5, 5),    /* MBOX_DUMP_RAM */
  61         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  62         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  63         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  64         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  65         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  66         PACKB(0, 0),    /* 0x0009 */
  67         PACKB(0, 0),    /* 0x000a */
  68         PACKB(0, 0),    /* 0x000b */
  69         PACKB(0, 0),    /* 0x000c */
  70         PACKB(0, 0),    /* 0x000d */
  71         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  72         PACKB(0, 0),    /* 0x000f */
  73         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  74         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  75         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  76         PACKB(2, 2),    /* MBOX_WAKE_UP */
  77         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  78         PACKB(4, 4),    /* MBOX_ABORT */
  79         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  80         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  81         PACKB(2, 2),    /* MBOX_BUS_RESET */
  82         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  83         PACKB(2, 3),    /* MBOX_START_QUEUE */
  84         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  85         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  86         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  87         PACKB(0, 0),    /* 0x001e */
  88         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  89         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  90         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
  91         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
  92         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
  93         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
  94         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
  95         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
  96         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
  97         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
  98         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
  99         PACKB(0, 0),    /* 0x002a */
 100         PACKB(0, 0),    /* 0x002b */
 101         PACKB(0, 0),    /* 0x002c */
 102         PACKB(0, 0),    /* 0x002d */
 103         PACKB(0, 0),    /* 0x002e */
 104         PACKB(0, 0),    /* 0x002f */
 105         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 106         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 107         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 108         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 109         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 110         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 111         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 112         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 113         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 114         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 115         PACKB(0, 0),    /* 0x003a */
 116         PACKB(0, 0),    /* 0x003b */
 117         PACKB(0, 0),    /* 0x003c */
 118         PACKB(0, 0),    /* 0x003d */
 119         PACKB(0, 0),    /* 0x003e */
 120         PACKB(0, 0),    /* 0x003f */
 121         PACKB(0, 0),    /* 0x0040 */
 122         PACKB(0, 0),    /* 0x0041 */
 123         PACKB(0, 0)     /* 0x0042 */
 124 };
 125
 126 #define MAX_MBOX_COMMAND        (sizeof(mbox_param)/sizeof(u_short))
 127
 128 /* queue length's _must_ be power of two: */
 129 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 130 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 131                                                     QLOGICPTI_REQ_QUEUE_LEN)
 132 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 133
 134 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 135 {
 136         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 137                     qpti->qregs + SBUS_CTRL);
 138 }
 139
 140 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 141 {
 142         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 143 }
 144
 145 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 146 {
 147         u16 val;
 148         u8 bursts = qpti->bursts;
 149
 150 #if 0   /* It appears that at least PTI cards do not support
 151          * 64-byte bursts and that setting the B64 bit actually
 152          * is a nop and the chip ends up using the smallest burst
 153          * size. -DaveM
 154          */
 155         if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) {
 156                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 157         } else
 158 #endif
 159         if (bursts & DMA_BURST32) {
 160                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 161         } else if (bursts & DMA_BURST16) {
 162                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 163         } else if (bursts & DMA_BURST8) {
 164                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 165         } else {
 166                 val = 0; /* No sbus bursts for you... */
 167         }
 168         sbus_writew(val, qpti->qregs + SBUS_CFG1);
 169 }
 170
 171 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 172 {
 173         int loop_count;
 174         u16 tmp;
 175
 176         if (mbox_param[param[0]] == 0)
 177                 return 1;
 178
 179         /* Set SBUS semaphore. */
 180         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 181         tmp |= SBUS_SEMAPHORE_LCK;
 182         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 183
 184         /* Wait for host IRQ bit to clear. */
 185         loop_count = DEFAULT_LOOP_COUNT;
 186         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 187                 barrier();
 188                 cpu_relax();
 189         }
 190         if (!loop_count)
 191                 printk(KERN_EMERG "qlogicpti: mbox_command loop timeout #1\n");
 192
 193         /* Write mailbox command registers. */
 194         switch (mbox_param[param[0]] >> 4) {
 195         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 196         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 197         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 198         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 199         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 200         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 201         }
 202
 203         /* Clear RISC interrupt. */
 204         tmp = sbus_readw(qpti->qregs + HCCTRL);
 205         tmp |= HCCTRL_CRIRQ;
 206         sbus_writew(tmp, qpti->qregs + HCCTRL);
 207
 208         /* Clear SBUS semaphore. */
 209         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 210
 211         /* Set HOST interrupt. */
 212         tmp = sbus_readw(qpti->qregs + HCCTRL);
 213         tmp |= HCCTRL_SHIRQ;
 214         sbus_writew(tmp, qpti->qregs + HCCTRL);
 215
 216         /* Wait for HOST interrupt clears. */
 217         loop_count = DEFAULT_LOOP_COUNT;
 218         while (--loop_count &&
 219                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 220                 udelay(20);
 221         if (!loop_count)
 222                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #2\n",
 223                        param[0]);
 224
 225         /* Wait for SBUS semaphore to get set. */
 226         loop_count = DEFAULT_LOOP_COUNT;
 227         while (--loop_count &&
 228                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 229                 udelay(20);
 230
 231                 /* Workaround for some buggy chips. */
 232                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 233                         break;
 234         }
 235         if (!loop_count)
 236                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #3\n",
 237                        param[0]);
 238
 239         /* Wait for MBOX busy condition to go away. */
 240         loop_count = DEFAULT_LOOP_COUNT;
 241         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 242                 udelay(20);
 243         if (!loop_count)
 244                 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #4\n",
 245                        param[0]);
 246
 247         /* Read back output parameters. */
 248         switch (mbox_param[param[0]] & 0xf) {
 249         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 250         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 251         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 252         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 253         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 254         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 255         }
 256
 257         /* Clear RISC interrupt. */
 258         tmp = sbus_readw(qpti->qregs + HCCTRL);
 259         tmp |= HCCTRL_CRIRQ;
 260         sbus_writew(tmp, qpti->qregs + HCCTRL);
 261
 262         /* Release SBUS semaphore. */
 263         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 264         tmp &= ~(SBUS_SEMAPHORE_LCK);
 265         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 266
 267         /* We're done. */
 268         return 0;
 269 }
 270
 271 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 272 {
 273         int i;
 274
 275         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 276         qpti->host_param.bus_reset_delay = 3;
 277         qpti->host_param.retry_count = 0;
 278         qpti->host_param.retry_delay = 5;
 279         qpti->host_param.async_data_setup_time = 3;
 280         qpti->host_param.req_ack_active_negation = 1;
 281         qpti->host_param.data_line_active_negation = 1;
 282         qpti->host_param.data_dma_burst_enable = 1;
 283         qpti->host_param.command_dma_burst_enable = 1;
 284         qpti->host_param.tag_aging = 8;
 285         qpti->host_param.selection_timeout = 250;
 286         qpti->host_param.max_queue_depth = 256;
 287
 288         for(i = 0; i < MAX_TARGETS; i++) {
 289                 /*
 290                  * disconnect, parity, arq, reneg on reset, and, oddly enough
 291                  * tags...the midlayer's notion of tagged support has to match
 292                  * our device settings, and since we base whether we enable a
 293                  * tag on a  per-cmnd basis upon what the midlayer sez, we
 294                  * actually enable the capability here.
 295                  */
 296                 qpti->dev_param[i].device_flags = 0xcd;
 297                 qpti->dev_param[i].execution_throttle = 16;
 298                 if (qpti->ultra) {
 299                         qpti->dev_param[i].synchronous_period = 12;
 300                         qpti->dev_param[i].synchronous_offset = 8;
 301                 } else {
 302                         qpti->dev_param[i].synchronous_period = 25;
 303                         qpti->dev_param[i].synchronous_offset = 12;
 304                 }
 305                 qpti->dev_param[i].device_enable = 1;
 306         }
 307         /* this is very important to set! */
 308         qpti->sbits = 1 << qpti->scsi_id;
 309 }
 310
 311 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 312 {
 313         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 314         u_short param[6];
 315         unsigned short risc_code_addr;
 316         int loop_count, i;
 317         unsigned long flags;
 318
 319         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 320
 321         save_flags(flags); cli();
 322
 323         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 324
 325         /* Only reset the scsi bus if it is not free. */
 326         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 327                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 328                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 329                 udelay(400);
 330         }
 331
 332         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 333         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 334         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 335
 336         loop_count = DEFAULT_LOOP_COUNT;
 337         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 338                 udelay(20);
 339         if (!loop_count)
 340                 printk(KERN_EMERG "qlogicpti: reset_hardware loop timeout\n");
 341
 342         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 343         set_sbus_cfg1(qpti);
 344         qlogicpti_enable_irqs(qpti);
 345
 346         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 347                 qpti->ultra = 1;
 348                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 349                             qpti->qregs + RISC_MTREG);
 350         } else {
 351                 qpti->ultra = 0;
 352                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 353                             qpti->qregs + RISC_MTREG);
 354         }
 355
 356         /* reset adapter and per-device default values. */
 357         /* do it after finding out whether we're ultra mode capable */
 358         qlogicpti_set_hostdev_defaults(qpti);
 359
 360         /* Release the RISC processor. */
 361         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 362
 363         /* Get RISC to start executing the firmware code. */
 364         param[0] = MBOX_EXEC_FIRMWARE;
 365         param[1] = risc_code_addr;
 366         if (qlogicpti_mbox_command(qpti, param, 1)) {
 367                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 368                        qpti->qpti_id);
 369                 restore_flags(flags);
 370                 return 1;
 371         }
 372
 373         /* Set initiator scsi ID. */
 374         param[0] = MBOX_SET_INIT_SCSI_ID;
 375         param[1] = qpti->host_param.initiator_scsi_id;
 376         if (qlogicpti_mbox_command(qpti, param, 1) ||
 377            (param[0] != MBOX_COMMAND_COMPLETE)) {
 378                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 379                        qpti->qpti_id);
 380                 restore_flags(flags);
 381                 return 1;
 382         }
 383
 384         /* Initialize state of the queues, both hw and sw. */
 385         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 386
 387         param[0] = MBOX_INIT_RES_QUEUE;
 388         param[1] = RES_QUEUE_LEN + 1;
 389         param[2] = (u_short) (qpti->res_dvma >> 16);
 390         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 391         param[4] = param[5] = 0;
 392         if (qlogicpti_mbox_command(qpti, param, 1)) {
 393                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 394                        qpti->qpti_id);
 395                 restore_flags(flags);
 396                 return 1;
 397         }
 398
 399         param[0] = MBOX_INIT_REQ_QUEUE;
 400         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 401         param[2] = (u_short) (qpti->req_dvma >> 16);
 402         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 403         param[4] = param[5] = 0;
 404         if (qlogicpti_mbox_command(qpti, param, 1)) {
 405                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 406                        qpti->qpti_id);
 407                 restore_flags(flags);
 408                 return 1;
 409         }
 410
 411         param[0] = MBOX_SET_RETRY_COUNT;
 412         param[1] = qpti->host_param.retry_count;
 413         param[2] = qpti->host_param.retry_delay;
 414         qlogicpti_mbox_command(qpti, param, 0);
 415
 416         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 417         param[1] = qpti->host_param.tag_aging;
 418         qlogicpti_mbox_command(qpti, param, 0);
 419
 420         for (i = 0; i < MAX_TARGETS; i++) {
 421                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 422                 param[1] = (i << 8);
 423                 qlogicpti_mbox_command(qpti, param, 0);
 424         }
 425
 426         param[0] = MBOX_GET_FIRMWARE_STATUS;
 427         qlogicpti_mbox_command(qpti, param, 0);
 428
 429         param[0] = MBOX_SET_SELECT_TIMEOUT;
 430         param[1] = qpti->host_param.selection_timeout;
 431         qlogicpti_mbox_command(qpti, param, 0);
 432
 433         for (i = 0; i < MAX_TARGETS; i++) {
 434                 param[0] = MBOX_SET_TARGET_PARAMS;
 435                 param[1] = (i << 8);
 436                 param[2] = (qpti->dev_param[i].device_flags << 8);
 437                 /*
 438                  * Since we're now loading 1.31 f/w, force narrow/async.
 439                  */
 440                 param[2] |= 0xc0;
 441                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 442                 qlogicpti_mbox_command(qpti, param, 0);
 443         }
 444
 445         /*
 446          * Always (sigh) do an initial bus reset (kicks f/w).
 447          */
 448         param[0] = MBOX_BUS_RESET;
 449         param[1] = qpti->host_param.bus_reset_delay;
 450         qlogicpti_mbox_command(qpti, param, 0);
 451         qpti->send_marker = 1;
 452
 453         restore_flags(flags);
 454         return 0;
 455 }
 456
 457 #define PTI_RESET_LIMIT 400
 458
 459 static int __init qlogicpti_load_firmware(struct qlogicpti *qpti)
 460 {
 461         unsigned short csum = 0;
 462         unsigned short param[6];
 463         unsigned short *risc_code, risc_code_addr, risc_code_length;
 464         unsigned long flags;
 465         int i, timeout;
 466
 467         risc_code = &sbus_risc_code01[0];
 468         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 469         risc_code_length = sbus_risc_code_length01;
 470
 471         save_flags(flags); cli();
 472
 473         /* Verify the checksum twice, one before loading it, and once
 474          * afterwards via the mailbox commands.
 475          */
 476         for (i = 0; i < risc_code_length; i++)
 477                 csum += risc_code[i];
 478         if (csum) {
 479                 restore_flags(flags);
 480                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 481                        qpti->qpti_id);
 482                 return 1;
 483         }
 484         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 485         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 486         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 487         timeout = PTI_RESET_LIMIT;
 488         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 489                 udelay(20);
 490         if (!timeout) {
 491                 restore_flags(flags);
 492                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 493                 return 1;
 494         }
 495
 496         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 497         mdelay(1);
 498
 499         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 500         set_sbus_cfg1(qpti);
 501         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 502
 503         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 504                 qpti->ultra = 1;
 505                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 506                             qpti->qregs + RISC_MTREG);
 507         } else {
 508                 qpti->ultra = 0;
 509                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 510                             qpti->qregs + RISC_MTREG);
 511         }
 512
 513         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 514
 515         /* Pin lines are only stable while RISC is paused. */
 516         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 517         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 518                 qpti->differential = 1;
 519         else
 520                 qpti->differential = 0;
 521         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 522
 523         /* This shouldn't be necessary- we've reset things so we should be
 524            running from the ROM now.. */
 525
 526         param[0] = MBOX_STOP_FIRMWARE;
 527         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 528         if (qlogicpti_mbox_command(qpti, param, 1)) {
 529                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 530                        qpti->qpti_id);
 531                 restore_flags(flags);
 532                 return 1;
 533         }
 534
 535         /* Load it up.. */
 536         for (i = 0; i < risc_code_length; i++) {
 537                 param[0] = MBOX_WRITE_RAM_WORD;
 538                 param[1] = risc_code_addr + i;
 539                 param[2] = risc_code[i];
 540                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 541                     param[0] != MBOX_COMMAND_COMPLETE) {
 542                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 543                                qpti->qpti_id);
 544                         restore_flags(flags);
 545                         return 1;
 546                 }
 547         }
 548
 549         /* Reset the ISP again. */
 550         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 551         mdelay(1);
 552
 553         qlogicpti_enable_irqs(qpti);
 554         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 555         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 556
 557         /* Ask ISP to verify the checksum of the new code. */
 558         param[0] = MBOX_VERIFY_CHECKSUM;
 559         param[1] = risc_code_addr;
 560         if (qlogicpti_mbox_command(qpti, param, 1) ||
 561             (param[0] != MBOX_COMMAND_COMPLETE)) {
 562                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 563                        qpti->qpti_id);
 564                 restore_flags(flags);
 565                 return 1;
 566         }
 567
 568         /* Start using newly downloaded firmware. */
 569         param[0] = MBOX_EXEC_FIRMWARE;
 570         param[1] = risc_code_addr;
 571         qlogicpti_mbox_command(qpti, param, 1);
 572
 573         param[0] = MBOX_ABOUT_FIRMWARE;
 574         if (qlogicpti_mbox_command(qpti, param, 1) ||
 575             (param[0] != MBOX_COMMAND_COMPLETE)) {
 576                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 577                        qpti->qpti_id);
 578                 restore_flags(flags);
 579                 return 1;
 580         }
 581
 582         /* Snag the major and minor revisions from the result. */
 583         qpti->fware_majrev = param[1];
 584         qpti->fware_minrev = param[2];
 585         qpti->fware_micrev = param[3];
 586
 587         /* Set the clock rate */
 588         param[0] = MBOX_SET_CLOCK_RATE;
 589         param[1] = qpti->clock;
 590         if (qlogicpti_mbox_command(qpti, param, 1) ||
 591             (param[0] != MBOX_COMMAND_COMPLETE)) {
 592                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 593                        qpti->qpti_id);
 594                 restore_flags(flags);
 595                 return 1;
 596         }
 597
 598         if (qpti->is_pti != 0) {
 599                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 600                 param[0] = MBOX_WRITE_RAM_WORD;
 601                 param[1] = 0xff80;
 602                 param[2] = (unsigned short) qpti->scsi_id;
 603                 qlogicpti_mbox_command(qpti, param, 1);
 604
 605                 param[0] = MBOX_WRITE_RAM_WORD;
 606                 param[1] = 0xff00;
 607                 param[2] = (unsigned short) 3;
 608                 qlogicpti_mbox_command(qpti, param, 1);
 609         }
 610
 611         restore_flags(flags);
 612         return 0;
 613 }
 614
 615 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 616 {
 617         int curstat = sbus_readb(qpti->sreg);
 618
 619         curstat &= 0xf0;
 620         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 621                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 622         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 623                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 624         if (curstat != qpti->swsreg) {
 625                 int error = 0;
 626                 if (curstat & SREG_FUSE) {
 627                         error++;
 628                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 629                 }
 630                 if (curstat & SREG_TPOWER) {
 631                         error++;
 632                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 633                 }
 634                 if (qpti->differential &&
 635                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 636                         error++;
 637                         printk("qlogicpti%d: You have a single ended device on a "
 638                                "differential bus!  Please fix!\n", qpti->qpti_id);
 639                 }
 640                 qpti->swsreg = curstat;
 641                 return error;
 642         }
 643         return 0;
 644 }
 645
 646 static void qpti_intr(int irq, void *dev_id, struct pt_regs *regs);
 647
 648 static void __init qpti_chain_add(struct qlogicpti *qpti)
 649 {
 650         spin_lock_irq(&qptichain_lock);
 651         if (qptichain != NULL) {
 652                 struct qlogicpti *qlink = qptichain;
 653
 654                 while(qlink->next)
 655                         qlink = qlink->next;
 656                 qlink->next = qpti;
 657         } else {
 658                 qptichain = qpti;
 659         }
 660         qpti->next = NULL;
 661         spin_unlock_irq(&qptichain_lock);
 662 }
 663
 664 static void __init qpti_chain_del(struct qlogicpti *qpti)
 665 {
 666         spin_lock_irq(&qptichain_lock);
 667         if (qptichain == qpti) {
 668                 qptichain = qpti->next;
 669         } else {
 670                 struct qlogicpti *qlink = qptichain;
 671                 while(qlink->next != qpti)
 672                         qlink = qlink->next;
 673                 qlink->next = qpti->next;
 674         }
 675         qpti->next = NULL;
 676         spin_unlock_irq(&qptichain_lock);
 677 }
 678
 679 static int __init qpti_map_regs(struct qlogicpti *qpti)
 680 {
 681         struct sbus_dev *sdev = qpti->sdev;
 682
 683         qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
 684                                    sdev->reg_addrs[0].reg_size,
 685                                    "PTI Qlogic/ISP");
 686         if (!qpti->qregs) {
 687                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 688                 return -1;
 689         }
 690         if (qpti->is_pti) {
 691                 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
 692                                           sizeof(unsigned char),
 693                                           "PTI Qlogic/ISP statreg");
 694                 if (!qpti->sreg) {
 695                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 696                         return -1;
 697                 }
 698         }
 699         return 0;
 700 }
 701
 702 static int __init qpti_register_irq(struct qlogicpti *qpti)
 703 {
 704         struct sbus_dev *sdev = qpti->sdev;
 705
 706         qpti->qhost->irq = qpti->irq = sdev->irqs[0];
 707
 708         /* We used to try various overly-clever things to
 709          * reduce the interrupt processing overhead on
 710          * sun4c/sun4m when multiple PTI's shared the
 711          * same IRQ.  It was too complex and messy to
 712          * sanely maintain.
 713          */
 714         if (request_irq(qpti->irq, qpti_intr,
 715                         SA_SHIRQ, "Qlogic/PTI", qpti))
 716                 goto fail;
 717
 718         printk("qpti%d: IRQ %s ", qpti->qpti_id, __irq_itoa(qpti->irq));
 719
 720         return 0;
 721
 722 fail:
 723         printk("qpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 724         return -1;
 725 }
 726
 727 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
 728 {
 729         qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 730                                            "initiator-id",
 731                                            -1);
 732         if (qpti->scsi_id == -1)
 733                 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
 734                                                    "scsi-initiator-id",
 735                                                    -1);
 736         if (qpti->scsi_id == -1)
 737                 qpti->scsi_id =
 738                         prom_getintdefault(qpti->sdev->bus->prom_node,
 739                                            "scsi-initiator-id", 7);
 740         qpti->qhost->this_id = qpti->scsi_id;
 741         qpti->qhost->max_sectors = 64;
 742
 743         printk("SCSI ID %d ", qpti->scsi_id);
 744 }
 745
 746 static void qpti_get_bursts(struct qlogicpti *qpti)
 747 {
 748         struct sbus_dev *sdev = qpti->sdev;
 749         u8 bursts, bmask;
 750
 751         bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
 752         bmask = prom_getintdefault(sdev->bus->prom_node,
 753                                    "burst-sizes", 0xff);
 754         if (bmask != 0xff)
 755                 bursts &= bmask;
 756         if (bursts == 0xff ||
 757             (bursts & DMA_BURST16) == 0 ||
 758             (bursts & DMA_BURST32) == 0)
 759                 bursts = (DMA_BURST32 - 1);
 760
 761         qpti->bursts = bursts;
 762 }
 763
 764 static void qpti_get_clock(struct qlogicpti *qpti)
 765 {
 766         unsigned int cfreq;
 767
 768         /* Check for what the clock input to this card is.
 769          * Default to 40Mhz.
 770          */
 771         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 772         qpti->clock = (cfreq + 500000)/1000000;
 773         if (qpti->clock == 0) /* bullshit */
 774                 qpti->clock = 40;
 775 }
 776
 777 /* The request and response queues must each be aligned
 778  * on a page boundry.
 779  */
 780 static int __init qpti_map_queues(struct qlogicpti *qpti)
 781 {
 782         struct sbus_dev *sdev = qpti->sdev;
 783
 784 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 785         qpti->res_cpu = sbus_alloc_consistent(sdev,
 786                                               QSIZE(RES_QUEUE_LEN),
 787                                               &qpti->res_dvma);
 788         if (qpti->res_cpu == NULL ||
 789             qpti->res_dvma == 0) {
 790                 printk("QPTI: Cannot map response queue.\n");
 791                 return -1;
 792         }
 793
 794         qpti->req_cpu = sbus_alloc_consistent(sdev,
 795                                               QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 796                                               &qpti->req_dvma);
 797         if (qpti->req_cpu == NULL ||
 798             qpti->req_dvma == 0) {
 799                 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
 800                                      qpti->res_cpu, qpti->res_dvma);
 801                 printk("QPTI: Cannot map request queue.\n");
 802                 return -1;
 803         }
 804         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 805         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 806         return 0;
 807 }
 808
 809 /* Detect all PTI Qlogic ISP's in the machine. */
 810 int __init qlogicpti_detect(Scsi_Host_Template *tpnt)
 811 {
 812         struct qlogicpti *qpti;
 813         struct Scsi_Host *qpti_host;
 814         struct sbus_bus *sbus;
 815         struct sbus_dev *sdev;
 816         int nqptis = 0, nqptis_in_use = 0;
 817
 818         tpnt->proc_name = "qlogicpti";
 819         for_each_sbus(sbus) {
 820                 for_each_sbusdev(sdev, sbus) {
 821                         /* Is this a red snapper? */
 822                         if (strcmp(sdev->prom_name, "ptisp") &&
 823                             strcmp(sdev->prom_name, "PTI,ptisp") &&
 824                             strcmp(sdev->prom_name, "QLGC,isp") &&
 825                             strcmp(sdev->prom_name, "SUNW,isp"))
 826                                 continue;
 827
 828                         /* Sometimes Antares cards come up not completely
 829                          * setup, and we get a report of a zero IRQ.
 830                          * Skip over them in such cases so we survive.
 831                          */
 832                         if (sdev->irqs[0] == 0) {
 833                                 printk("qpti%d: Adapter reports no interrupt, "
 834                                        "skipping over this card.", nqptis);
 835                                 continue;
 836                         }
 837
 838                         /* Yep, register and allocate software state. */
 839                         qpti_host = scsi_register(tpnt, sizeof(struct qlogicpti));
 840                         if (!qpti_host) {
 841                                 printk("QPTI: Cannot register PTI Qlogic ISP SCSI host");
 842                                 continue;
 843                         }
 844                         qpti = (struct qlogicpti *) qpti_host->hostdata;
 845
 846                         spin_lock_init(&qpti->lock);
 847
 848                         /* We are wide capable, 16 targets. */
 849                         qpti_host->max_id = MAX_TARGETS;
 850
 851                         /* Setup back pointers and misc. state. */
 852                         qpti->qhost = qpti_host;
 853                         qpti->sdev = sdev;
 854                         qpti->qpti_id = nqptis++;
 855                         qpti->prom_node = sdev->prom_node;
 856                         prom_getstring(qpti->prom_node, "name",
 857                                        qpti->prom_name,
 858                                        sizeof(qpti->prom_name));
 859
 860                         /* This is not correct, actually. There's a switch
 861                          * on the PTI cards that put them into "emulation"
 862                          * mode- i.e., report themselves as QLGC,isp
 863                          * instead of PTI,ptisp. The only real substantive
 864                          * difference between non-pti and pti cards is
 865                          * the tmon register. Which is possibly even
 866                          * there for Qlogic cards, but non-functional.
 867                          */
 868                         qpti->is_pti = (strcmp (qpti->prom_name, "QLGC,isp") != 0);
 869
 870                         qpti_chain_add(qpti);
 871                         if (qpti_map_regs(qpti) < 0)
 872                                 goto fail_unlink;
 873
 874                         if (qpti_register_irq(qpti) < 0)
 875                                 goto fail_unmap_regs;
 876
 877                         qpti_get_scsi_id(qpti);
 878                         qpti_get_bursts(qpti);
 879                         qpti_get_clock(qpti);
 880
 881                         /* Clear out Scsi_Cmnd array. */
 882                         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
 883
 884                         if (qpti_map_queues(qpti) < 0)
 885                                 goto fail_free_irq;
 886
 887                         /* Load the firmware. */
 888                         if (qlogicpti_load_firmware(qpti))
 889                                 goto fail_unmap_queues;
 890                         if (qpti->is_pti) {
 891                                 /* Check the PTI status reg. */
 892                                 if (qlogicpti_verify_tmon(qpti))
 893                                         goto fail_unmap_queues;
 894                         }
 895
 896                         /* Reset the ISP and init res/req queues. */
 897                         if (qlogicpti_reset_hardware(qpti_host))
 898                                 goto fail_unmap_queues;
 899
 900                         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
 901                             qpti->fware_minrev, qpti->fware_micrev);
 902                         {
 903                                 char buffer[60];
 904
 905                                 prom_getstring (qpti->prom_node,
 906                                                 "isp-fcode", buffer, 60);
 907                                 if (buffer[0])
 908                                         printk("(Firmware %s)", buffer);
 909                                 if (prom_getbool(qpti->prom_node, "differential"))
 910                                         qpti->differential = 1;
 911                         }
 912
 913                         printk (" [%s Wide, using %s interface]\n",
 914                                (qpti->ultra ? "Ultra" : "Fast"),
 915                                (qpti->differential ? "differential" : "single ended"));
 916
 917                         nqptis_in_use++;
 918                         continue;
 919
 920                 fail_unmap_queues:
 921 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 922                         sbus_free_consistent(qpti->sdev,
 923                                              QSIZE(RES_QUEUE_LEN),
 924                                              qpti->res_cpu, qpti->res_dvma);
 925                         sbus_free_consistent(qpti->sdev,
 926                                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 927                                              qpti->req_cpu, qpti->req_dvma);
 928 #undef QSIZE
 929                 fail_free_irq:
 930                         free_irq(qpti->irq, qpti);
 931
 932                 fail_unmap_regs:
 933                         sbus_iounmap(qpti->qregs,
 934                                      qpti->sdev->reg_addrs[0].reg_size);
 935                         if (qpti->is_pti)
 936                                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
 937                 fail_unlink:
 938                         qpti_chain_del(qpti);
 939                         scsi_unregister(qpti->qhost);
 940                 }
 941         }
 942         if (nqptis)
 943                 printk("QPTI: Total of %d PTI Qlogic/ISP hosts found, %d actually in use.\n",
 944                        nqptis, nqptis_in_use);
 945         qptis_running = nqptis_in_use;
 946         return nqptis;
 947 }
 948
 949 int qlogicpti_release(struct Scsi_Host *host)
 950 {
 951         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 952
 953         /* Remove visibility from IRQ handlers. */
 954         qpti_chain_del(qpti);
 955
 956         /* Shut up the card. */
 957         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 958
 959         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
 960         free_irq(qpti->irq, qpti);
 961
 962 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 963         sbus_free_consistent(qpti->sdev,
 964                              QSIZE(RES_QUEUE_LEN),
 965                              qpti->res_cpu, qpti->res_dvma);
 966         sbus_free_consistent(qpti->sdev,
 967                              QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 968                              qpti->req_cpu, qpti->req_dvma);
 969 #undef QSIZE
 970
 971         sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
 972         if (qpti->is_pti)
 973                 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
 974
 975         return 0;
 976 }
 977
 978 const char *qlogicpti_info(struct Scsi_Host *host)
 979 {
 980         static char buf[80];
 981         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 982
 983         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %s regs at %lx",
 984                 __irq_itoa(qpti->qhost->irq), qpti->qregs);
 985         return buf;
 986 }
 987
 988 /* I am a certified frobtronicist. */
 989 static inline void marker_frob(struct Command_Entry *cmd)
 990 {
 991         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 992
 993         memset(marker, 0, sizeof(struct Marker_Entry));
 994         marker->hdr.entry_cnt = 1;
 995         marker->hdr.entry_type = ENTRY_MARKER;
 996         marker->modifier = SYNC_ALL;
 997         marker->rsvd = 0;
 998 }
 999
1000 static inline void cmd_frob(struct Command_Entry *cmd, Scsi_Cmnd *Cmnd,
1001                             struct qlogicpti *qpti)
1002 {
1003         memset(cmd, 0, sizeof(struct Command_Entry));
1004         cmd->hdr.entry_cnt = 1;
1005         cmd->hdr.entry_type = ENTRY_COMMAND;
1006         cmd->target_id = Cmnd->target;
1007         cmd->target_lun = Cmnd->lun;
1008         cmd->cdb_length = Cmnd->cmd_len;
1009         cmd->control_flags = 0;
1010         if (Cmnd->device->tagged_supported) {
1011                 if (qpti->cmd_count[Cmnd->target] == 0)
1012                         qpti->tag_ages[Cmnd->target] = jiffies;
1013                 if ((jiffies - qpti->tag_ages[Cmnd->target]) > (5*HZ)) {
1014                         cmd->control_flags = CFLAG_ORDERED_TAG;
1015                         qpti->tag_ages[Cmnd->target] = jiffies;
1016                 } else
1017                         cmd->control_flags = CFLAG_SIMPLE_TAG;
1018         }
1019         if ((Cmnd->cmnd[0] == WRITE_6) ||
1020             (Cmnd->cmnd[0] == WRITE_10) ||
1021             (Cmnd->cmnd[0] == WRITE_12))
1022                 cmd->control_flags |= CFLAG_WRITE;
1023         else
1024                 cmd->control_flags |= CFLAG_READ;
1025         cmd->time_out = 30;
1026         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
1027 }
1028
1029 /* Do it to it baby. */
1030 static inline int load_cmd(Scsi_Cmnd *Cmnd, struct Command_Entry *cmd,
1031                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
1032 {
1033         struct dataseg *ds;
1034         struct scatterlist *sg;
1035         int i, n;
1036
1037         if (Cmnd->use_sg) {
1038                 int sg_count;
1039
1040                 sg = (struct scatterlist *) Cmnd->buffer;
1041                 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, scsi_to_sbus_dma_dir(Cmnd->sc_data_direction));
1042
1043                 ds = cmd->dataseg;
1044                 cmd->segment_cnt = sg_count;
1045
1046                 /* Fill in first four sg entries: */
1047                 n = sg_count;
1048                 if (n > 4)
1049                         n = 4;
1050                 for (i = 0; i < n; i++, sg++) {
1051                         ds[i].d_base = sg_dma_address(sg);
1052                         ds[i].d_count = sg_dma_len(sg);
1053                 }
1054                 sg_count -= 4;
1055                 while (sg_count > 0) {
1056                         struct Continuation_Entry *cont;
1057
1058                         ++cmd->hdr.entry_cnt;
1059                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
1060                         in_ptr = NEXT_REQ_PTR(in_ptr);
1061                         if (in_ptr == out_ptr)
1062                                 return -1;
1063
1064                         cont->hdr.entry_type = ENTRY_CONTINUATION;
1065                         cont->hdr.entry_cnt = 0;
1066                         cont->hdr.sys_def_1 = 0;
1067                         cont->hdr.flags = 0;
1068                         cont->reserved = 0;
1069                         ds = cont->dataseg;
1070                         n = sg_count;
1071                         if (n > 7)
1072                                 n = 7;
1073                         for (i = 0; i < n; i++, sg++) {
1074                                 ds[i].d_base = sg_dma_address(sg);
1075                                 ds[i].d_count = sg_dma_len(sg);
1076                         }
1077                         sg_count -= n;
1078                 }
1079         } else if (Cmnd->request_bufflen) {
1080                 Cmnd->SCp.ptr = (char *)(unsigned long)
1081                         sbus_map_single(qpti->sdev,
1082                                         Cmnd->request_buffer,
1083                                         Cmnd->request_bufflen,
1084                                         scsi_to_sbus_dma_dir(Cmnd->sc_data_direction));
1085
1086                 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
1087                 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
1088                 cmd->segment_cnt = 1;
1089         } else {
1090                 cmd->dataseg[0].d_base = 0;
1091                 cmd->dataseg[0].d_count = 0;
1092                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
1093         }
1094
1095         /* Committed, record Scsi_Cmd so we can find it later. */
1096         cmd->handle = in_ptr;
1097         qpti->cmd_slots[in_ptr] = Cmnd;
1098
1099         qpti->cmd_count[Cmnd->target]++;
1100         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1101         qpti->req_in_ptr = in_ptr;
1102
1103         return in_ptr;
1104 }
1105
1106 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
1107 {
1108         /* Temporary workaround until bug is found and fixed (one bug has been found
1109            already, but fixing it makes things even worse) -jj */
1110         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
1111         host->can_queue = host->host_busy + num_free;
1112         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
1113 }
1114
1115 /*
1116  * Until we scan the entire bus with inquiries, go throught this fella...
1117  */
1118 static void ourdone(Scsi_Cmnd *Cmnd)
1119 {
1120         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->host->hostdata;
1121         int tgt = Cmnd->target;
1122         void (*done) (Scsi_Cmnd *);
1123
1124         /* This grot added by DaveM, blame him for ugliness.
1125          * The issue is that in the 2.3.x driver we use the
1126          * host_scribble portion of the scsi command as a
1127          * completion linked list at interrupt service time,
1128          * so we have to store the done function pointer elsewhere.
1129          */
1130         done = (void (*)(Scsi_Cmnd *))
1131                 (((unsigned long) Cmnd->SCp.Message)
1132 #ifdef __sparc_v9__
1133                  | ((unsigned long) Cmnd->SCp.Status << 32UL)
1134 #endif
1135                  );
1136
1137         if ((qpti->sbits & (1 << tgt)) == 0) {
1138                 int ok = host_byte(Cmnd->result) == DID_OK;
1139                 if (Cmnd->cmnd[0] == 0x12 && ok) {
1140                         unsigned char *iqd;
1141                         if (Cmnd->use_sg == 0) {
1142                                 iqd = ((unsigned char *)Cmnd->buffer);
1143                         } else {
1144                                 iqd = ((struct scatterlist *) Cmnd->request_buffer)->address;
1145                         }
1146                         /* tags handled in midlayer */
1147                         /* enable sync mode? */
1148                         if (iqd[7] & 0x10) {
1149                                 qpti->dev_param[tgt].device_flags |= 0x10;
1150                         } else {
1151                                 qpti->dev_param[tgt].synchronous_offset = 0;
1152                                 qpti->dev_param[tgt].synchronous_period = 0;
1153                         }
1154                         /* are we wide capable? */
1155                         if (iqd[7] & 0x20) {
1156                                 qpti->dev_param[tgt].device_flags |= 0x20;
1157                         }
1158                         qpti->sbits |= (1 << tgt);
1159                 } else if (!ok) {
1160                         qpti->sbits |= (1 << tgt);
1161                 }
1162         }
1163         done(Cmnd);
1164 }
1165
1166 int qlogicpti_queuecommand_slow(Scsi_Cmnd *Cmnd, void (*done)(Scsi_Cmnd *))
1167 {
1168         unsigned long flags;
1169         struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->host->hostdata;
1170
1171         /*
1172          * done checking this host adapter?
1173          * If not, then rewrite the command
1174          * to finish through ourdone so we
1175          * can peek at Inquiry data results.
1176          */
1177         if (qpti->sbits && qpti->sbits != 0xffff) {
1178                 /* See above about in ourdone this ugliness... */
1179                 Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
1180 #ifdef __sparc_v9__
1181                 Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
1182 #endif
1183                 return qlogicpti_queuecommand(Cmnd, ourdone);
1184         }
1185         save_flags(flags); cli();
1186
1187         /*
1188          * We've peeked at all targets for this bus- time
1189          * to set parameters for devices for real now.
1190          */
1191         if (qpti->sbits == 0xffff) {
1192                 int i;
1193                 for(i = 0; i < MAX_TARGETS; i++) {
1194                         u_short param[6];
1195                         param[0] = MBOX_SET_TARGET_PARAMS;
1196                         param[1] = (i << 8);
1197                         param[2] = (qpti->dev_param[i].device_flags << 8);
1198                         if (qpti->dev_param[i].device_flags & 0x10) {
1199                                 param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
1200                                         qpti->dev_param[i].synchronous_period;
1201                         } else {
1202                                 param[3] = 0;
1203                         }
1204                         (void) qlogicpti_mbox_command(qpti, param, 0);
1205                 }
1206                 /*
1207                  * set to zero so any traverse through ourdone
1208                  * doesn't start the whole process again,
1209                  */
1210                 qpti->sbits = 0;
1211         }
1212
1213         /* check to see if we're done with all adapters... */
1214         for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
1215                 if (qpti->sbits) {
1216                         break;
1217                 }
1218         }
1219
1220         /*
1221          * if we hit the end of the chain w/o finding adapters still
1222          * capability-configuring, then we're done with all adapters
1223          * and can rock on..
1224          */
1225         if (qpti == NULL)
1226                 Cmnd->host->hostt->queuecommand = qlogicpti_queuecommand;
1227
1228         restore_flags(flags);
1229         return qlogicpti_queuecommand(Cmnd, done);
1230 }
1231
1232 /*
1233  * The middle SCSI layer ensures that queuecommand never gets invoked
1234  * concurrently with itself or the interrupt handler (though the
1235  * interrupt handler may call this routine as part of
1236  * request-completion handling).
1237  *
1238  * "This code must fly." -davem
1239  */
1240 int qlogicpti_queuecommand(Scsi_Cmnd *Cmnd, void (*done)(Scsi_Cmnd *))
1241 {
1242         struct Scsi_Host *host = Cmnd->host;
1243         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1244         struct Command_Entry *cmd;
1245         unsigned long flags;
1246         u_int out_ptr;
1247         int in_ptr;
1248
1249         Cmnd->scsi_done = done;
1250
1251         spin_lock_irqsave(&qpti->lock, flags);
1252
1253         in_ptr = qpti->req_in_ptr;
1254         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1255         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1256         in_ptr = NEXT_REQ_PTR(in_ptr);
1257         if (in_ptr == out_ptr)
1258                 goto toss_command;
1259
1260         if (qpti->send_marker) {
1261                 marker_frob(cmd);
1262                 qpti->send_marker = 0;
1263                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1264                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1265                         qpti->req_in_ptr = in_ptr;
1266                         goto toss_command;
1267                 }
1268                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1269                 in_ptr = NEXT_REQ_PTR(in_ptr);
1270         }
1271         cmd_frob(cmd, Cmnd, qpti);
1272         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1273                 goto toss_command;
1274
1275         update_can_queue(host, in_ptr, out_ptr);
1276
1277         spin_unlock_irqrestore(&qpti->lock, flags);
1278         return 0;
1279
1280 toss_command:
1281         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1282                qpti->qpti_id);
1283
1284         spin_unlock_irqrestore(&qpti->lock, flags);
1285
1286         /* Unfortunately, unless you use the new EH code, which
1287          * we don't, the midlayer will ignore the return value,
1288          * which is insane.  We pick up the pieces like this.
1289          */
1290         Cmnd->result = DID_BUS_BUSY;
1291         done(Cmnd);
1292         return 1;
1293 }
1294
1295 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1296 {
1297         int host_status = DID_ERROR;
1298
1299         switch (sts->completion_status) {
1300               case CS_COMPLETE:
1301                 host_status = DID_OK;
1302                 break;
1303               case CS_INCOMPLETE:
1304                 if (!(sts->state_flags & SF_GOT_BUS))
1305                         host_status = DID_NO_CONNECT;
1306                 else if (!(sts->state_flags & SF_GOT_TARGET))
1307                         host_status = DID_BAD_TARGET;
1308                 else if (!(sts->state_flags & SF_SENT_CDB))
1309                         host_status = DID_ERROR;
1310                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1311                         host_status = DID_ERROR;
1312                 else if (!(sts->state_flags & SF_GOT_STATUS))
1313                         host_status = DID_ERROR;
1314                 else if (!(sts->state_flags & SF_GOT_SENSE))
1315                         host_status = DID_ERROR;
1316                 break;
1317               case CS_DMA_ERROR:
1318               case CS_TRANSPORT_ERROR:
1319                 host_status = DID_ERROR;
1320                 break;
1321               case CS_RESET_OCCURRED:
1322               case CS_BUS_RESET:
1323                 host_status = DID_RESET;
1324                 break;
1325               case CS_ABORTED:
1326                 host_status = DID_ABORT;
1327                 break;
1328               case CS_TIMEOUT:
1329                 host_status = DID_TIME_OUT;
1330                 break;
1331               case CS_DATA_OVERRUN:
1332               case CS_COMMAND_OVERRUN:
1333               case CS_STATUS_OVERRUN:
1334               case CS_BAD_MESSAGE:
1335               case CS_NO_MESSAGE_OUT:
1336               case CS_EXT_ID_FAILED:
1337               case CS_IDE_MSG_FAILED:
1338               case CS_ABORT_MSG_FAILED:
1339               case CS_NOP_MSG_FAILED:
1340               case CS_PARITY_ERROR_MSG_FAILED:
1341               case CS_DEVICE_RESET_MSG_FAILED:
1342               case CS_ID_MSG_FAILED:
1343               case CS_UNEXP_BUS_FREE:
1344                 host_status = DID_ERROR;
1345                 break;
1346               case CS_DATA_UNDERRUN:
1347                 host_status = DID_OK;
1348                 break;
1349               default:
1350                 printk(KERN_EMERG "qpti%d: unknown completion status 0x%04x\n",
1351                        id, sts->completion_status);
1352                 host_status = DID_ERROR;
1353                 break;
1354         }
1355
1356         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1357 }
1358
1359 static Scsi_Cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1360 {
1361         Scsi_Cmnd *Cmnd, *done_queue = NULL;
1362         struct Status_Entry *sts;
1363         u_int in_ptr, out_ptr;
1364
1365         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1366                 return NULL;
1367
1368         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1369         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1370         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1371                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1372                 case ASYNC_SCSI_BUS_RESET:
1373                 case EXECUTION_TIMEOUT_RESET:
1374                         qpti->send_marker = 1;
1375                         break;
1376                 case INVALID_COMMAND:
1377                 case HOST_INTERFACE_ERROR:
1378                 case COMMAND_ERROR:
1379                 case COMMAND_PARAM_ERROR:
1380                         break;
1381                 };
1382                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1383         }
1384
1385         /* This looks like a network driver! */
1386         out_ptr = qpti->res_out_ptr;
1387         while (out_ptr != in_ptr) {
1388                 u_int cmd_slot;
1389
1390                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1391                 out_ptr = NEXT_RES_PTR(out_ptr);
1392
1393                 /* We store an index in the handle, not the pointer in
1394                  * some form.  This avoids problems due to the fact
1395                  * that the handle provided is only 32-bits. -DaveM
1396                  */
1397                 cmd_slot = sts->handle;
1398                 Cmnd = qpti->cmd_slots[cmd_slot];
1399                 qpti->cmd_slots[cmd_slot] = NULL;
1400
1401                 if (sts->completion_status == CS_RESET_OCCURRED ||
1402                     sts->completion_status == CS_ABORTED ||
1403                     (sts->status_flags & STF_BUS_RESET))
1404                         qpti->send_marker = 1;
1405
1406                 if (sts->state_flags & SF_GOT_SENSE)
1407                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1408                                sizeof(Cmnd->sense_buffer));
1409
1410                 if (sts->hdr.entry_type == ENTRY_STATUS)
1411                         Cmnd->result =
1412                             qlogicpti_return_status(sts, qpti->qpti_id);
1413                 else
1414                         Cmnd->result = DID_ERROR << 16;
1415
1416                 if (Cmnd->use_sg) {
1417                         sbus_unmap_sg(qpti->sdev,
1418                                       (struct scatterlist *)Cmnd->buffer,
1419                                       Cmnd->use_sg,
1420                                       scsi_to_sbus_dma_dir(Cmnd->sc_data_direction));
1421                 } else {
1422                         sbus_unmap_single(qpti->sdev,
1423                                           (__u32)((unsigned long)Cmnd->SCp.ptr),
1424                                           Cmnd->request_bufflen,
1425                                           scsi_to_sbus_dma_dir(Cmnd->sc_data_direction));
1426                 }
1427                 qpti->cmd_count[Cmnd->target]--;
1428                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1429                 Cmnd->host_scribble = (unsigned char *) done_queue;
1430                 done_queue = Cmnd;
1431         }
1432         qpti->res_out_ptr = out_ptr;
1433
1434         return done_queue;
1435 }
1436
1437 static void qpti_intr(int irq, void *dev_id, struct pt_regs *regs)
1438 {
1439         struct qlogicpti *qpti = dev_id;
1440         unsigned long flags;
1441         Scsi_Cmnd *dq;
1442
1443         spin_lock_irqsave(&qpti->lock, flags);
1444         dq = qlogicpti_intr_handler(qpti);
1445         spin_unlock(&qpti->lock);
1446
1447         if (dq != NULL) {
1448                 spin_lock(&io_request_lock);
1449                 do {
1450                         Scsi_Cmnd *next;
1451
1452                         next = (Scsi_Cmnd *) dq->host_scribble;
1453                         dq->scsi_done(dq);
1454                         dq = next;
1455                 } while (dq != NULL);
1456                 spin_unlock(&io_request_lock);
1457         }
1458         __restore_flags(flags);
1459 }
1460
1461 int qlogicpti_abort(Scsi_Cmnd *Cmnd)
1462 {
1463         u_short param[6];
1464         struct Scsi_Host *host = Cmnd->host;
1465         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1466         int return_status = SCSI_ABORT_SUCCESS;
1467         unsigned long flags;
1468         u32 cmd_cookie;
1469         int i;
1470
1471         printk(KERN_WARNING "qlogicpti : Aborting cmd for tgt[%d] lun[%d]\n",
1472                (int)Cmnd->target, (int)Cmnd->lun);
1473
1474         spin_lock_irqsave(&qpti->lock, flags);
1475
1476         qlogicpti_disable_irqs(qpti);
1477
1478         /* Find the 32-bit cookie we gave to the firmware for
1479          * this command.
1480          */
1481         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1482                 if (qpti->cmd_slots[i] == Cmnd)
1483                         break;
1484         cmd_cookie = i;
1485
1486         param[0] = MBOX_ABORT;
1487         param[1] = (((u_short) Cmnd->target) << 8) | Cmnd->lun;
1488         param[2] = cmd_cookie >> 16;
1489         param[3] = cmd_cookie & 0xffff;
1490         if (qlogicpti_mbox_command(qpti, param, 0) ||
1491             (param[0] != MBOX_COMMAND_COMPLETE)) {
1492                 printk(KERN_EMERG "qlogicpti : scsi abort failure: %x\n", param[0]);
1493                 return_status = SCSI_ABORT_ERROR;
1494         }
1495
1496         qlogicpti_enable_irqs(qpti);
1497
1498         spin_unlock_irqrestore(&qpti->lock, flags);
1499
1500         return return_status;
1501 }
1502
1503 int qlogicpti_reset(Scsi_Cmnd *Cmnd, unsigned int reset_flags)
1504 {
1505         u_short param[6];
1506         struct Scsi_Host *host = Cmnd->host;
1507         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1508         int return_status = SCSI_RESET_SUCCESS;
1509         unsigned long flags;
1510
1511         printk(KERN_WARNING "qlogicpti : Resetting SCSI bus!\n");
1512
1513         spin_lock_irqsave(&qpti->lock, flags);
1514
1515         qlogicpti_disable_irqs(qpti);
1516
1517         param[0] = MBOX_BUS_RESET;
1518         param[1] = qpti->host_param.bus_reset_delay;
1519         if (qlogicpti_mbox_command(qpti, param, 0) ||
1520            (param[0] != MBOX_COMMAND_COMPLETE)) {
1521                 printk(KERN_EMERG "qlogicisp : scsi bus reset failure: %x\n", param[0]);
1522                 return_status = SCSI_RESET_ERROR;
1523         }
1524
1525         qlogicpti_enable_irqs(qpti);
1526
1527         spin_unlock_irqrestore(&qpti->lock, flags);
1528
1529         return return_status;
1530 }
1531
1532 static Scsi_Host_Template driver_template = QLOGICPTI;
1533
1534 #include "scsi_module.c"
1535
1536 MODULE_LICENSE("GPL");