linux/drivers/scsi/qlogicpti.c
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   1/* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
   2 *
   3 * Copyright (C) 1996, 2006, 2008 David S. Miller (davem@davemloft.net)
   4 *
   5 * A lot of this driver was directly stolen from Erik H. Moe's PCI
   6 * Qlogic ISP driver.  Mucho kudos to him for this code.
   7 *
   8 * An even bigger kudos to John Grana at Performance Technologies
   9 * for providing me with the hardware to write this driver, you rule
  10 * John you really do.
  11 *
  12 * May, 2, 1997: Added support for QLGC,isp --jj
  13 */
  14
  15#include <linux/kernel.h>
  16#include <linux/delay.h>
  17#include <linux/types.h>
  18#include <linux/string.h>
  19#include <linux/gfp.h>
  20#include <linux/blkdev.h>
  21#include <linux/proc_fs.h>
  22#include <linux/stat.h>
  23#include <linux/init.h>
  24#include <linux/spinlock.h>
  25#include <linux/interrupt.h>
  26#include <linux/module.h>
  27#include <linux/jiffies.h>
  28#include <linux/dma-mapping.h>
  29#include <linux/of.h>
  30#include <linux/of_device.h>
  31#include <linux/firmware.h>
  32
  33#include <asm/byteorder.h>
  34
  35#include "qlogicpti.h"
  36
  37#include <asm/dma.h>
  38#include <asm/system.h>
  39#include <asm/ptrace.h>
  40#include <asm/pgtable.h>
  41#include <asm/oplib.h>
  42#include <asm/io.h>
  43#include <asm/irq.h>
  44
  45#include <scsi/scsi.h>
  46#include <scsi/scsi_cmnd.h>
  47#include <scsi/scsi_device.h>
  48#include <scsi/scsi_eh.h>
  49#include <scsi/scsi_tcq.h>
  50#include <scsi/scsi_host.h>
  51
  52#define MAX_TARGETS     16
  53#define MAX_LUNS        8       /* 32 for 1.31 F/W */
  54
  55#define DEFAULT_LOOP_COUNT      10000
  56
  57static struct qlogicpti *qptichain = NULL;
  58static DEFINE_SPINLOCK(qptichain_lock);
  59
  60#define PACKB(a, b)                     (((a)<<4)|(b))
  61
  62static const u_char mbox_param[] = {
  63        PACKB(1, 1),    /* MBOX_NO_OP */
  64        PACKB(5, 5),    /* MBOX_LOAD_RAM */
  65        PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  66        PACKB(5, 5),    /* MBOX_DUMP_RAM */
  67        PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  68        PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  69        PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  70        PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  71        PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  72        PACKB(0, 0),    /* 0x0009 */
  73        PACKB(0, 0),    /* 0x000a */
  74        PACKB(0, 0),    /* 0x000b */
  75        PACKB(0, 0),    /* 0x000c */
  76        PACKB(0, 0),    /* 0x000d */
  77        PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  78        PACKB(0, 0),    /* 0x000f */
  79        PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  80        PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  81        PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  82        PACKB(2, 2),    /* MBOX_WAKE_UP */
  83        PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  84        PACKB(4, 4),    /* MBOX_ABORT */
  85        PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  86        PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  87        PACKB(2, 2),    /* MBOX_BUS_RESET */
  88        PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  89        PACKB(2, 3),    /* MBOX_START_QUEUE */
  90        PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  91        PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  92        PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  93        PACKB(0, 0),    /* 0x001e */
  94        PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  95        PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  96        PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
  97        PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
  98        PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
  99        PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
 100        PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
 101        PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
 102        PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
 103        PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
 104        PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
 105        PACKB(0, 0),    /* 0x002a */
 106        PACKB(0, 0),    /* 0x002b */
 107        PACKB(0, 0),    /* 0x002c */
 108        PACKB(0, 0),    /* 0x002d */
 109        PACKB(0, 0),    /* 0x002e */
 110        PACKB(0, 0),    /* 0x002f */
 111        PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 112        PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 113        PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 114        PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 115        PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 116        PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 117        PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 118        PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 119        PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 120        PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 121        PACKB(0, 0),    /* 0x003a */
 122        PACKB(0, 0),    /* 0x003b */
 123        PACKB(0, 0),    /* 0x003c */
 124        PACKB(0, 0),    /* 0x003d */
 125        PACKB(0, 0),    /* 0x003e */
 126        PACKB(0, 0),    /* 0x003f */
 127        PACKB(0, 0),    /* 0x0040 */
 128        PACKB(0, 0),    /* 0x0041 */
 129        PACKB(0, 0)     /* 0x0042 */
 130};
 131
 132#define MAX_MBOX_COMMAND        ARRAY_SIZE(mbox_param)
 133
 134/* queue length's _must_ be power of two: */
 135#define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 136#define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 137                                                    QLOGICPTI_REQ_QUEUE_LEN)
 138#define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 139
 140static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 141{
 142        sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 143                    qpti->qregs + SBUS_CTRL);
 144}
 145
 146static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 147{
 148        sbus_writew(0, qpti->qregs + SBUS_CTRL);
 149}
 150
 151static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 152{
 153        u16 val;
 154        u8 bursts = qpti->bursts;
 155
 156#if 0   /* It appears that at least PTI cards do not support
 157         * 64-byte bursts and that setting the B64 bit actually
 158         * is a nop and the chip ends up using the smallest burst
 159         * size. -DaveM
 160         */
 161        if (sbus_can_burst64() && (bursts & DMA_BURST64)) {
 162                val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 163        } else
 164#endif
 165        if (bursts & DMA_BURST32) {
 166                val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 167        } else if (bursts & DMA_BURST16) {
 168                val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 169        } else if (bursts & DMA_BURST8) {
 170                val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 171        } else {
 172                val = 0; /* No sbus bursts for you... */
 173        }
 174        sbus_writew(val, qpti->qregs + SBUS_CFG1);
 175}
 176
 177static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 178{
 179        int loop_count;
 180        u16 tmp;
 181
 182        if (mbox_param[param[0]] == 0)
 183                return 1;
 184
 185        /* Set SBUS semaphore. */
 186        tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 187        tmp |= SBUS_SEMAPHORE_LCK;
 188        sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 189
 190        /* Wait for host IRQ bit to clear. */
 191        loop_count = DEFAULT_LOOP_COUNT;
 192        while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 193                barrier();
 194                cpu_relax();
 195        }
 196        if (!loop_count)
 197                printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
 198                       qpti->qpti_id);
 199
 200        /* Write mailbox command registers. */
 201        switch (mbox_param[param[0]] >> 4) {
 202        case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 203        case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 204        case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 205        case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 206        case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 207        case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 208        }
 209
 210        /* Clear RISC interrupt. */
 211        tmp = sbus_readw(qpti->qregs + HCCTRL);
 212        tmp |= HCCTRL_CRIRQ;
 213        sbus_writew(tmp, qpti->qregs + HCCTRL);
 214
 215        /* Clear SBUS semaphore. */
 216        sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 217
 218        /* Set HOST interrupt. */
 219        tmp = sbus_readw(qpti->qregs + HCCTRL);
 220        tmp |= HCCTRL_SHIRQ;
 221        sbus_writew(tmp, qpti->qregs + HCCTRL);
 222
 223        /* Wait for HOST interrupt clears. */
 224        loop_count = DEFAULT_LOOP_COUNT;
 225        while (--loop_count &&
 226               (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 227                udelay(20);
 228        if (!loop_count)
 229                printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
 230                       qpti->qpti_id, param[0]);
 231
 232        /* Wait for SBUS semaphore to get set. */
 233        loop_count = DEFAULT_LOOP_COUNT;
 234        while (--loop_count &&
 235               !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 236                udelay(20);
 237
 238                /* Workaround for some buggy chips. */
 239                if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 240                        break;
 241        }
 242        if (!loop_count)
 243                printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
 244                       qpti->qpti_id, param[0]);
 245
 246        /* Wait for MBOX busy condition to go away. */
 247        loop_count = DEFAULT_LOOP_COUNT;
 248        while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 249                udelay(20);
 250        if (!loop_count)
 251                printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
 252                       qpti->qpti_id, param[0]);
 253
 254        /* Read back output parameters. */
 255        switch (mbox_param[param[0]] & 0xf) {
 256        case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 257        case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 258        case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 259        case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 260        case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 261        case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 262        }
 263
 264        /* Clear RISC interrupt. */
 265        tmp = sbus_readw(qpti->qregs + HCCTRL);
 266        tmp |= HCCTRL_CRIRQ;
 267        sbus_writew(tmp, qpti->qregs + HCCTRL);
 268
 269        /* Release SBUS semaphore. */
 270        tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 271        tmp &= ~(SBUS_SEMAPHORE_LCK);
 272        sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 273
 274        /* We're done. */
 275        return 0;
 276}
 277
 278static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 279{
 280        int i;
 281
 282        qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 283        qpti->host_param.bus_reset_delay = 3;
 284        qpti->host_param.retry_count = 0;
 285        qpti->host_param.retry_delay = 5;
 286        qpti->host_param.async_data_setup_time = 3;
 287        qpti->host_param.req_ack_active_negation = 1;
 288        qpti->host_param.data_line_active_negation = 1;
 289        qpti->host_param.data_dma_burst_enable = 1;
 290        qpti->host_param.command_dma_burst_enable = 1;
 291        qpti->host_param.tag_aging = 8;
 292        qpti->host_param.selection_timeout = 250;
 293        qpti->host_param.max_queue_depth = 256;
 294
 295        for(i = 0; i < MAX_TARGETS; i++) {
 296                /*
 297                 * disconnect, parity, arq, reneg on reset, and, oddly enough
 298                 * tags...the midlayer's notion of tagged support has to match
 299                 * our device settings, and since we base whether we enable a
 300                 * tag on a  per-cmnd basis upon what the midlayer sez, we
 301                 * actually enable the capability here.
 302                 */
 303                qpti->dev_param[i].device_flags = 0xcd;
 304                qpti->dev_param[i].execution_throttle = 16;
 305                if (qpti->ultra) {
 306                        qpti->dev_param[i].synchronous_period = 12;
 307                        qpti->dev_param[i].synchronous_offset = 8;
 308                } else {
 309                        qpti->dev_param[i].synchronous_period = 25;
 310                        qpti->dev_param[i].synchronous_offset = 12;
 311                }
 312                qpti->dev_param[i].device_enable = 1;
 313        }
 314}
 315
 316static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 317{
 318        struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 319        u_short param[6];
 320        unsigned short risc_code_addr;
 321        int loop_count, i;
 322        unsigned long flags;
 323
 324        risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 325
 326        spin_lock_irqsave(host->host_lock, flags);
 327
 328        sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 329
 330        /* Only reset the scsi bus if it is not free. */
 331        if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 332                sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 333                sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 334                udelay(400);
 335        }
 336
 337        sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 338        sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 339        sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 340
 341        loop_count = DEFAULT_LOOP_COUNT;
 342        while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 343                udelay(20);
 344        if (!loop_count)
 345                printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
 346                       qpti->qpti_id);
 347
 348        sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 349        set_sbus_cfg1(qpti);
 350        qlogicpti_enable_irqs(qpti);
 351
 352        if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 353                qpti->ultra = 1;
 354                sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 355                            qpti->qregs + RISC_MTREG);
 356        } else {
 357                qpti->ultra = 0;
 358                sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 359                            qpti->qregs + RISC_MTREG);
 360        }
 361
 362        /* reset adapter and per-device default values. */
 363        /* do it after finding out whether we're ultra mode capable */
 364        qlogicpti_set_hostdev_defaults(qpti);
 365
 366        /* Release the RISC processor. */
 367        sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 368
 369        /* Get RISC to start executing the firmware code. */
 370        param[0] = MBOX_EXEC_FIRMWARE;
 371        param[1] = risc_code_addr;
 372        if (qlogicpti_mbox_command(qpti, param, 1)) {
 373                printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 374                       qpti->qpti_id);
 375                spin_unlock_irqrestore(host->host_lock, flags);
 376                return 1;
 377        }
 378
 379        /* Set initiator scsi ID. */
 380        param[0] = MBOX_SET_INIT_SCSI_ID;
 381        param[1] = qpti->host_param.initiator_scsi_id;
 382        if (qlogicpti_mbox_command(qpti, param, 1) ||
 383           (param[0] != MBOX_COMMAND_COMPLETE)) {
 384                printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 385                       qpti->qpti_id);
 386                spin_unlock_irqrestore(host->host_lock, flags);
 387                return 1;
 388        }
 389
 390        /* Initialize state of the queues, both hw and sw. */
 391        qpti->req_in_ptr = qpti->res_out_ptr = 0;
 392
 393        param[0] = MBOX_INIT_RES_QUEUE;
 394        param[1] = RES_QUEUE_LEN + 1;
 395        param[2] = (u_short) (qpti->res_dvma >> 16);
 396        param[3] = (u_short) (qpti->res_dvma & 0xffff);
 397        param[4] = param[5] = 0;
 398        if (qlogicpti_mbox_command(qpti, param, 1)) {
 399                printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 400                       qpti->qpti_id);
 401                spin_unlock_irqrestore(host->host_lock, flags);
 402                return 1;
 403        }
 404
 405        param[0] = MBOX_INIT_REQ_QUEUE;
 406        param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 407        param[2] = (u_short) (qpti->req_dvma >> 16);
 408        param[3] = (u_short) (qpti->req_dvma & 0xffff);
 409        param[4] = param[5] = 0;
 410        if (qlogicpti_mbox_command(qpti, param, 1)) {
 411                printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 412                       qpti->qpti_id);
 413                spin_unlock_irqrestore(host->host_lock, flags);
 414                return 1;
 415        }
 416
 417        param[0] = MBOX_SET_RETRY_COUNT;
 418        param[1] = qpti->host_param.retry_count;
 419        param[2] = qpti->host_param.retry_delay;
 420        qlogicpti_mbox_command(qpti, param, 0);
 421
 422        param[0] = MBOX_SET_TAG_AGE_LIMIT;
 423        param[1] = qpti->host_param.tag_aging;
 424        qlogicpti_mbox_command(qpti, param, 0);
 425
 426        for (i = 0; i < MAX_TARGETS; i++) {
 427                param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 428                param[1] = (i << 8);
 429                qlogicpti_mbox_command(qpti, param, 0);
 430        }
 431
 432        param[0] = MBOX_GET_FIRMWARE_STATUS;
 433        qlogicpti_mbox_command(qpti, param, 0);
 434
 435        param[0] = MBOX_SET_SELECT_TIMEOUT;
 436        param[1] = qpti->host_param.selection_timeout;
 437        qlogicpti_mbox_command(qpti, param, 0);
 438
 439        for (i = 0; i < MAX_TARGETS; i++) {
 440                param[0] = MBOX_SET_TARGET_PARAMS;
 441                param[1] = (i << 8);
 442                param[2] = (qpti->dev_param[i].device_flags << 8);
 443                /*
 444                 * Since we're now loading 1.31 f/w, force narrow/async.
 445                 */
 446                param[2] |= 0xc0;
 447                param[3] = 0;   /* no offset, we do not have sync mode yet */
 448                qlogicpti_mbox_command(qpti, param, 0);
 449        }
 450
 451        /*
 452         * Always (sigh) do an initial bus reset (kicks f/w).
 453         */
 454        param[0] = MBOX_BUS_RESET;
 455        param[1] = qpti->host_param.bus_reset_delay;
 456        qlogicpti_mbox_command(qpti, param, 0);
 457        qpti->send_marker = 1;
 458
 459        spin_unlock_irqrestore(host->host_lock, flags);
 460        return 0;
 461}
 462
 463#define PTI_RESET_LIMIT 400
 464
 465static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
 466{
 467        const struct firmware *fw;
 468        const char fwname[] = "qlogic/isp1000.bin";
 469        const __le16 *fw_data;
 470        struct Scsi_Host *host = qpti->qhost;
 471        unsigned short csum = 0;
 472        unsigned short param[6];
 473        unsigned short risc_code_addr, risc_code_length;
 474        int err;
 475        unsigned long flags;
 476        int i, timeout;
 477
 478        err = request_firmware(&fw, fwname, &qpti->op->dev);
 479        if (err) {
 480                printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 481                       fwname, err);
 482                return err;
 483        }
 484        if (fw->size % 2) {
 485                printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
 486                       fw->size, fwname);
 487                err = -EINVAL;
 488                goto outfirm;
 489        }
 490        fw_data = (const __le16 *)&fw->data[0];
 491        risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 492        risc_code_length = fw->size / 2;
 493
 494        spin_lock_irqsave(host->host_lock, flags);
 495
 496        /* Verify the checksum twice, one before loading it, and once
 497         * afterwards via the mailbox commands.
 498         */
 499        for (i = 0; i < risc_code_length; i++)
 500                csum += __le16_to_cpu(fw_data[i]);
 501        if (csum) {
 502                printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 503                       qpti->qpti_id);
 504                err = 1;
 505                goto out;
 506        }               
 507        sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 508        sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 509        sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 510        timeout = PTI_RESET_LIMIT;
 511        while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 512                udelay(20);
 513        if (!timeout) {
 514                printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 515                err = 1;
 516                goto out;
 517        }
 518
 519        sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 520        mdelay(1);
 521
 522        sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 523        set_sbus_cfg1(qpti);
 524        sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 525
 526        if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 527                qpti->ultra = 1;
 528                sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 529                            qpti->qregs + RISC_MTREG);
 530        } else {
 531                qpti->ultra = 0;
 532                sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 533                            qpti->qregs + RISC_MTREG);
 534        }
 535
 536        sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 537
 538        /* Pin lines are only stable while RISC is paused. */
 539        sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 540        if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 541                qpti->differential = 1;
 542        else
 543                qpti->differential = 0;
 544        sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 545
 546        /* This shouldn't be necessary- we've reset things so we should be
 547           running from the ROM now.. */
 548
 549        param[0] = MBOX_STOP_FIRMWARE;
 550        param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 551        if (qlogicpti_mbox_command(qpti, param, 1)) {
 552                printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 553                       qpti->qpti_id);
 554                err = 1;
 555                goto out;
 556        }               
 557
 558        /* Load it up.. */
 559        for (i = 0; i < risc_code_length; i++) {
 560                param[0] = MBOX_WRITE_RAM_WORD;
 561                param[1] = risc_code_addr + i;
 562                param[2] = __le16_to_cpu(fw_data[i]);
 563                if (qlogicpti_mbox_command(qpti, param, 1) ||
 564                    param[0] != MBOX_COMMAND_COMPLETE) {
 565                        printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 566                               qpti->qpti_id);
 567                        err = 1;
 568                        goto out;
 569                }
 570        }
 571
 572        /* Reset the ISP again. */
 573        sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 574        mdelay(1);
 575
 576        qlogicpti_enable_irqs(qpti);
 577        sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 578        sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 579
 580        /* Ask ISP to verify the checksum of the new code. */
 581        param[0] = MBOX_VERIFY_CHECKSUM;
 582        param[1] = risc_code_addr;
 583        if (qlogicpti_mbox_command(qpti, param, 1) ||
 584            (param[0] != MBOX_COMMAND_COMPLETE)) {
 585                printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 586                       qpti->qpti_id);
 587                err = 1;
 588                goto out;
 589        }
 590
 591        /* Start using newly downloaded firmware. */
 592        param[0] = MBOX_EXEC_FIRMWARE;
 593        param[1] = risc_code_addr;
 594        qlogicpti_mbox_command(qpti, param, 1);
 595
 596        param[0] = MBOX_ABOUT_FIRMWARE;
 597        if (qlogicpti_mbox_command(qpti, param, 1) ||
 598            (param[0] != MBOX_COMMAND_COMPLETE)) {
 599                printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 600                       qpti->qpti_id);
 601                err = 1;
 602                goto out;
 603        }
 604
 605        /* Snag the major and minor revisions from the result. */
 606        qpti->fware_majrev = param[1];
 607        qpti->fware_minrev = param[2];
 608        qpti->fware_micrev = param[3];
 609
 610        /* Set the clock rate */
 611        param[0] = MBOX_SET_CLOCK_RATE;
 612        param[1] = qpti->clock;
 613        if (qlogicpti_mbox_command(qpti, param, 1) ||
 614            (param[0] != MBOX_COMMAND_COMPLETE)) {
 615                printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 616                       qpti->qpti_id);
 617                err = 1;
 618                goto out;
 619        }
 620
 621        if (qpti->is_pti != 0) {
 622                /* Load scsi initiator ID and interrupt level into sbus static ram. */
 623                param[0] = MBOX_WRITE_RAM_WORD;
 624                param[1] = 0xff80;
 625                param[2] = (unsigned short) qpti->scsi_id;
 626                qlogicpti_mbox_command(qpti, param, 1);
 627
 628                param[0] = MBOX_WRITE_RAM_WORD;
 629                param[1] = 0xff00;
 630                param[2] = (unsigned short) 3;
 631                qlogicpti_mbox_command(qpti, param, 1);
 632        }
 633
 634out:
 635        spin_unlock_irqrestore(host->host_lock, flags);
 636outfirm:
 637        release_firmware(fw);
 638        return err;
 639}
 640
 641static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 642{
 643        int curstat = sbus_readb(qpti->sreg);
 644
 645        curstat &= 0xf0;
 646        if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 647                printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 648        if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 649                printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 650        if (curstat != qpti->swsreg) {
 651                int error = 0;
 652                if (curstat & SREG_FUSE) {
 653                        error++;
 654                        printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 655                }
 656                if (curstat & SREG_TPOWER) {
 657                        error++;
 658                        printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 659                }
 660                if (qpti->differential &&
 661                    (curstat & SREG_DSENSE) != SREG_DSENSE) {
 662                        error++;
 663                        printk("qlogicpti%d: You have a single ended device on a "
 664                               "differential bus!  Please fix!\n", qpti->qpti_id);
 665                }
 666                qpti->swsreg = curstat;
 667                return error;
 668        }
 669        return 0;
 670}
 671
 672static irqreturn_t qpti_intr(int irq, void *dev_id);
 673
 674static void __devinit qpti_chain_add(struct qlogicpti *qpti)
 675{
 676        spin_lock_irq(&qptichain_lock);
 677        if (qptichain != NULL) {
 678                struct qlogicpti *qlink = qptichain;
 679
 680                while(qlink->next)
 681                        qlink = qlink->next;
 682                qlink->next = qpti;
 683        } else {
 684                qptichain = qpti;
 685        }
 686        qpti->next = NULL;
 687        spin_unlock_irq(&qptichain_lock);
 688}
 689
 690static void __devexit qpti_chain_del(struct qlogicpti *qpti)
 691{
 692        spin_lock_irq(&qptichain_lock);
 693        if (qptichain == qpti) {
 694                qptichain = qpti->next;
 695        } else {
 696                struct qlogicpti *qlink = qptichain;
 697                while(qlink->next != qpti)
 698                        qlink = qlink->next;
 699                qlink->next = qpti->next;
 700        }
 701        qpti->next = NULL;
 702        spin_unlock_irq(&qptichain_lock);
 703}
 704
 705static int __devinit qpti_map_regs(struct qlogicpti *qpti)
 706{
 707        struct platform_device *op = qpti->op;
 708
 709        qpti->qregs = of_ioremap(&op->resource[0], 0,
 710                                 resource_size(&op->resource[0]),
 711                                 "PTI Qlogic/ISP");
 712        if (!qpti->qregs) {
 713                printk("PTI: Qlogic/ISP registers are unmappable\n");
 714                return -1;
 715        }
 716        if (qpti->is_pti) {
 717                qpti->sreg = of_ioremap(&op->resource[0], (16 * 4096),
 718                                        sizeof(unsigned char),
 719                                        "PTI Qlogic/ISP statreg");
 720                if (!qpti->sreg) {
 721                        printk("PTI: Qlogic/ISP status register is unmappable\n");
 722                        return -1;
 723                }
 724        }
 725        return 0;
 726}
 727
 728static int __devinit qpti_register_irq(struct qlogicpti *qpti)
 729{
 730        struct platform_device *op = qpti->op;
 731
 732        qpti->qhost->irq = qpti->irq = op->archdata.irqs[0];
 733
 734        /* We used to try various overly-clever things to
 735         * reduce the interrupt processing overhead on
 736         * sun4c/sun4m when multiple PTI's shared the
 737         * same IRQ.  It was too complex and messy to
 738         * sanely maintain.
 739         */
 740        if (request_irq(qpti->irq, qpti_intr,
 741                        IRQF_SHARED, "QlogicPTI", qpti))
 742                goto fail;
 743
 744        printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 745
 746        return 0;
 747
 748fail:
 749        printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 750        return -1;
 751}
 752
 753static void __devinit qpti_get_scsi_id(struct qlogicpti *qpti)
 754{
 755        struct platform_device *op = qpti->op;
 756        struct device_node *dp;
 757
 758        dp = op->dev.of_node;
 759
 760        qpti->scsi_id = of_getintprop_default(dp, "initiator-id", -1);
 761        if (qpti->scsi_id == -1)
 762                qpti->scsi_id = of_getintprop_default(dp, "scsi-initiator-id",
 763                                                      -1);
 764        if (qpti->scsi_id == -1)
 765                qpti->scsi_id =
 766                        of_getintprop_default(dp->parent,
 767                                              "scsi-initiator-id", 7);
 768        qpti->qhost->this_id = qpti->scsi_id;
 769        qpti->qhost->max_sectors = 64;
 770
 771        printk("SCSI ID %d ", qpti->scsi_id);
 772}
 773
 774static void qpti_get_bursts(struct qlogicpti *qpti)
 775{
 776        struct platform_device *op = qpti->op;
 777        u8 bursts, bmask;
 778
 779        bursts = of_getintprop_default(op->dev.of_node, "burst-sizes", 0xff);
 780        bmask = of_getintprop_default(op->dev.of_node->parent, "burst-sizes", 0xff);
 781        if (bmask != 0xff)
 782                bursts &= bmask;
 783        if (bursts == 0xff ||
 784            (bursts & DMA_BURST16) == 0 ||
 785            (bursts & DMA_BURST32) == 0)
 786                bursts = (DMA_BURST32 - 1);
 787
 788        qpti->bursts = bursts;
 789}
 790
 791static void qpti_get_clock(struct qlogicpti *qpti)
 792{
 793        unsigned int cfreq;
 794
 795        /* Check for what the clock input to this card is.
 796         * Default to 40Mhz.
 797         */
 798        cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 799        qpti->clock = (cfreq + 500000)/1000000;
 800        if (qpti->clock == 0) /* bullshit */
 801                qpti->clock = 40;
 802}
 803
 804/* The request and response queues must each be aligned
 805 * on a page boundary.
 806 */
 807static int __devinit qpti_map_queues(struct qlogicpti *qpti)
 808{
 809        struct platform_device *op = qpti->op;
 810
 811#define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 812        qpti->res_cpu = dma_alloc_coherent(&op->dev,
 813                                           QSIZE(RES_QUEUE_LEN),
 814                                           &qpti->res_dvma, GFP_ATOMIC);
 815        if (qpti->res_cpu == NULL ||
 816            qpti->res_dvma == 0) {
 817                printk("QPTI: Cannot map response queue.\n");
 818                return -1;
 819        }
 820
 821        qpti->req_cpu = dma_alloc_coherent(&op->dev,
 822                                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 823                                           &qpti->req_dvma, GFP_ATOMIC);
 824        if (qpti->req_cpu == NULL ||
 825            qpti->req_dvma == 0) {
 826                dma_free_coherent(&op->dev, QSIZE(RES_QUEUE_LEN),
 827                                  qpti->res_cpu, qpti->res_dvma);
 828                printk("QPTI: Cannot map request queue.\n");
 829                return -1;
 830        }
 831        memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 832        memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 833        return 0;
 834}
 835
 836const char *qlogicpti_info(struct Scsi_Host *host)
 837{
 838        static char buf[80];
 839        struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 840
 841        sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
 842                qpti->qhost->irq, qpti->qregs);
 843        return buf;
 844}
 845
 846/* I am a certified frobtronicist. */
 847static inline void marker_frob(struct Command_Entry *cmd)
 848{
 849        struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 850
 851        memset(marker, 0, sizeof(struct Marker_Entry));
 852        marker->hdr.entry_cnt = 1;
 853        marker->hdr.entry_type = ENTRY_MARKER;
 854        marker->modifier = SYNC_ALL;
 855        marker->rsvd = 0;
 856}
 857
 858static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
 859                            struct qlogicpti *qpti)
 860{
 861        memset(cmd, 0, sizeof(struct Command_Entry));
 862        cmd->hdr.entry_cnt = 1;
 863        cmd->hdr.entry_type = ENTRY_COMMAND;
 864        cmd->target_id = Cmnd->device->id;
 865        cmd->target_lun = Cmnd->device->lun;
 866        cmd->cdb_length = Cmnd->cmd_len;
 867        cmd->control_flags = 0;
 868        if (Cmnd->device->tagged_supported) {
 869                if (qpti->cmd_count[Cmnd->device->id] == 0)
 870                        qpti->tag_ages[Cmnd->device->id] = jiffies;
 871                if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
 872                        cmd->control_flags = CFLAG_ORDERED_TAG;
 873                        qpti->tag_ages[Cmnd->device->id] = jiffies;
 874                } else
 875                        cmd->control_flags = CFLAG_SIMPLE_TAG;
 876        }
 877        if ((Cmnd->cmnd[0] == WRITE_6) ||
 878            (Cmnd->cmnd[0] == WRITE_10) ||
 879            (Cmnd->cmnd[0] == WRITE_12))
 880                cmd->control_flags |= CFLAG_WRITE;
 881        else
 882                cmd->control_flags |= CFLAG_READ;
 883        cmd->time_out = Cmnd->request->timeout/HZ;
 884        memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
 885}
 886
 887/* Do it to it baby. */
 888static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
 889                           struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
 890{
 891        struct dataseg *ds;
 892        struct scatterlist *sg, *s;
 893        int i, n;
 894
 895        if (scsi_bufflen(Cmnd)) {
 896                int sg_count;
 897
 898                sg = scsi_sglist(Cmnd);
 899                sg_count = dma_map_sg(&qpti->op->dev, sg,
 900                                      scsi_sg_count(Cmnd),
 901                                      Cmnd->sc_data_direction);
 902
 903                ds = cmd->dataseg;
 904                cmd->segment_cnt = sg_count;
 905
 906                /* Fill in first four sg entries: */
 907                n = sg_count;
 908                if (n > 4)
 909                        n = 4;
 910                for_each_sg(sg, s, n, i) {
 911                        ds[i].d_base = sg_dma_address(s);
 912                        ds[i].d_count = sg_dma_len(s);
 913                }
 914                sg_count -= 4;
 915                sg = s;
 916                while (sg_count > 0) {
 917                        struct Continuation_Entry *cont;
 918
 919                        ++cmd->hdr.entry_cnt;
 920                        cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
 921                        in_ptr = NEXT_REQ_PTR(in_ptr);
 922                        if (in_ptr == out_ptr)
 923                                return -1;
 924
 925                        cont->hdr.entry_type = ENTRY_CONTINUATION;
 926                        cont->hdr.entry_cnt = 0;
 927                        cont->hdr.sys_def_1 = 0;
 928                        cont->hdr.flags = 0;
 929                        cont->reserved = 0;
 930                        ds = cont->dataseg;
 931                        n = sg_count;
 932                        if (n > 7)
 933                                n = 7;
 934                        for_each_sg(sg, s, n, i) {
 935                                ds[i].d_base = sg_dma_address(s);
 936                                ds[i].d_count = sg_dma_len(s);
 937                        }
 938                        sg_count -= n;
 939                        sg = s;
 940                }
 941        } else {
 942                cmd->dataseg[0].d_base = 0;
 943                cmd->dataseg[0].d_count = 0;
 944                cmd->segment_cnt = 1; /* Shouldn't this be 0? */
 945        }
 946
 947        /* Committed, record Scsi_Cmd so we can find it later. */
 948        cmd->handle = in_ptr;
 949        qpti->cmd_slots[in_ptr] = Cmnd;
 950
 951        qpti->cmd_count[Cmnd->device->id]++;
 952        sbus_writew(in_ptr, qpti->qregs + MBOX4);
 953        qpti->req_in_ptr = in_ptr;
 954
 955        return in_ptr;
 956}
 957
 958static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
 959{
 960        /* Temporary workaround until bug is found and fixed (one bug has been found
 961           already, but fixing it makes things even worse) -jj */
 962        int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
 963        host->can_queue = host->host_busy + num_free;
 964        host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
 965}
 966
 967static int qlogicpti_slave_configure(struct scsi_device *sdev)
 968{
 969        struct qlogicpti *qpti = shost_priv(sdev->host);
 970        int tgt = sdev->id;
 971        u_short param[6];
 972
 973        /* tags handled in midlayer */
 974        /* enable sync mode? */
 975        if (sdev->sdtr) {
 976                qpti->dev_param[tgt].device_flags |= 0x10;
 977        } else {
 978                qpti->dev_param[tgt].synchronous_offset = 0;
 979                qpti->dev_param[tgt].synchronous_period = 0;
 980        }
 981        /* are we wide capable? */
 982        if (sdev->wdtr)
 983                qpti->dev_param[tgt].device_flags |= 0x20;
 984
 985        param[0] = MBOX_SET_TARGET_PARAMS;
 986        param[1] = (tgt << 8);
 987        param[2] = (qpti->dev_param[tgt].device_flags << 8);
 988        if (qpti->dev_param[tgt].device_flags & 0x10) {
 989                param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
 990                        qpti->dev_param[tgt].synchronous_period;
 991        } else {
 992                param[3] = 0;
 993        }
 994        qlogicpti_mbox_command(qpti, param, 0);
 995        return 0;
 996}
 997
 998/*
 999 * The middle SCSI layer ensures that queuecommand never gets invoked
1000 * concurrently with itself or the interrupt handler (though the
1001 * interrupt handler may call this routine as part of
1002 * request-completion handling).
1003 *
1004 * "This code must fly." -davem
1005 */
1006static int qlogicpti_queuecommand_lck(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1007{
1008        struct Scsi_Host *host = Cmnd->device->host;
1009        struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1010        struct Command_Entry *cmd;
1011        u_int out_ptr;
1012        int in_ptr;
1013
1014        Cmnd->scsi_done = done;
1015
1016        in_ptr = qpti->req_in_ptr;
1017        cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1018        out_ptr = sbus_readw(qpti->qregs + MBOX4);
1019        in_ptr = NEXT_REQ_PTR(in_ptr);
1020        if (in_ptr == out_ptr)
1021                goto toss_command;
1022
1023        if (qpti->send_marker) {
1024                marker_frob(cmd);
1025                qpti->send_marker = 0;
1026                if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1027                        sbus_writew(in_ptr, qpti->qregs + MBOX4);
1028                        qpti->req_in_ptr = in_ptr;
1029                        goto toss_command;
1030                }
1031                cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1032                in_ptr = NEXT_REQ_PTR(in_ptr);
1033        }
1034        cmd_frob(cmd, Cmnd, qpti);
1035        if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1036                goto toss_command;
1037
1038        update_can_queue(host, in_ptr, out_ptr);
1039
1040        return 0;
1041
1042toss_command:
1043        printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1044               qpti->qpti_id);
1045
1046        /* Unfortunately, unless you use the new EH code, which
1047         * we don't, the midlayer will ignore the return value,
1048         * which is insane.  We pick up the pieces like this.
1049         */
1050        Cmnd->result = DID_BUS_BUSY;
1051        done(Cmnd);
1052        return 1;
1053}
1054
1055static DEF_SCSI_QCMD(qlogicpti_queuecommand)
1056
1057static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1058{
1059        int host_status = DID_ERROR;
1060
1061        switch (sts->completion_status) {
1062              case CS_COMPLETE:
1063                host_status = DID_OK;
1064                break;
1065              case CS_INCOMPLETE:
1066                if (!(sts->state_flags & SF_GOT_BUS))
1067                        host_status = DID_NO_CONNECT;
1068                else if (!(sts->state_flags & SF_GOT_TARGET))
1069                        host_status = DID_BAD_TARGET;
1070                else if (!(sts->state_flags & SF_SENT_CDB))
1071                        host_status = DID_ERROR;
1072                else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1073                        host_status = DID_ERROR;
1074                else if (!(sts->state_flags & SF_GOT_STATUS))
1075                        host_status = DID_ERROR;
1076                else if (!(sts->state_flags & SF_GOT_SENSE))
1077                        host_status = DID_ERROR;
1078                break;
1079              case CS_DMA_ERROR:
1080              case CS_TRANSPORT_ERROR:
1081                host_status = DID_ERROR;
1082                break;
1083              case CS_RESET_OCCURRED:
1084              case CS_BUS_RESET:
1085                host_status = DID_RESET;
1086                break;
1087              case CS_ABORTED:
1088                host_status = DID_ABORT;
1089                break;
1090              case CS_TIMEOUT:
1091                host_status = DID_TIME_OUT;
1092                break;
1093              case CS_DATA_OVERRUN:
1094              case CS_COMMAND_OVERRUN:
1095              case CS_STATUS_OVERRUN:
1096              case CS_BAD_MESSAGE:
1097              case CS_NO_MESSAGE_OUT:
1098              case CS_EXT_ID_FAILED:
1099              case CS_IDE_MSG_FAILED:
1100              case CS_ABORT_MSG_FAILED:
1101              case CS_NOP_MSG_FAILED:
1102              case CS_PARITY_ERROR_MSG_FAILED:
1103              case CS_DEVICE_RESET_MSG_FAILED:
1104              case CS_ID_MSG_FAILED:
1105              case CS_UNEXP_BUS_FREE:
1106                host_status = DID_ERROR;
1107                break;
1108              case CS_DATA_UNDERRUN:
1109                host_status = DID_OK;
1110                break;
1111              default:
1112                printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1113                       id, sts->completion_status);
1114                host_status = DID_ERROR;
1115                break;
1116        }
1117
1118        return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1119}
1120
1121static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1122{
1123        struct scsi_cmnd *Cmnd, *done_queue = NULL;
1124        struct Status_Entry *sts;
1125        u_int in_ptr, out_ptr;
1126
1127        if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1128                return NULL;
1129                
1130        in_ptr = sbus_readw(qpti->qregs + MBOX5);
1131        sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1132        if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1133                switch (sbus_readw(qpti->qregs + MBOX0)) {
1134                case ASYNC_SCSI_BUS_RESET:
1135                case EXECUTION_TIMEOUT_RESET:
1136                        qpti->send_marker = 1;
1137                        break;
1138                case INVALID_COMMAND:
1139                case HOST_INTERFACE_ERROR:
1140                case COMMAND_ERROR:
1141                case COMMAND_PARAM_ERROR:
1142                        break;
1143                };
1144                sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1145        }
1146
1147        /* This looks like a network driver! */
1148        out_ptr = qpti->res_out_ptr;
1149        while (out_ptr != in_ptr) {
1150                u_int cmd_slot;
1151
1152                sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1153                out_ptr = NEXT_RES_PTR(out_ptr);
1154
1155                /* We store an index in the handle, not the pointer in
1156                 * some form.  This avoids problems due to the fact
1157                 * that the handle provided is only 32-bits. -DaveM
1158                 */
1159                cmd_slot = sts->handle;
1160                Cmnd = qpti->cmd_slots[cmd_slot];
1161                qpti->cmd_slots[cmd_slot] = NULL;
1162
1163                if (sts->completion_status == CS_RESET_OCCURRED ||
1164                    sts->completion_status == CS_ABORTED ||
1165                    (sts->status_flags & STF_BUS_RESET))
1166                        qpti->send_marker = 1;
1167
1168                if (sts->state_flags & SF_GOT_SENSE)
1169                        memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1170                               SCSI_SENSE_BUFFERSIZE);
1171
1172                if (sts->hdr.entry_type == ENTRY_STATUS)
1173                        Cmnd->result =
1174                            qlogicpti_return_status(sts, qpti->qpti_id);
1175                else
1176                        Cmnd->result = DID_ERROR << 16;
1177
1178                if (scsi_bufflen(Cmnd))
1179                        dma_unmap_sg(&qpti->op->dev,
1180                                     scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
1181                                     Cmnd->sc_data_direction);
1182
1183                qpti->cmd_count[Cmnd->device->id]--;
1184                sbus_writew(out_ptr, qpti->qregs + MBOX5);
1185                Cmnd->host_scribble = (unsigned char *) done_queue;
1186                done_queue = Cmnd;
1187        }
1188        qpti->res_out_ptr = out_ptr;
1189
1190        return done_queue;
1191}
1192
1193static irqreturn_t qpti_intr(int irq, void *dev_id)
1194{
1195        struct qlogicpti *qpti = dev_id;
1196        unsigned long flags;
1197        struct scsi_cmnd *dq;
1198
1199        spin_lock_irqsave(qpti->qhost->host_lock, flags);
1200        dq = qlogicpti_intr_handler(qpti);
1201
1202        if (dq != NULL) {
1203                do {
1204                        struct scsi_cmnd *next;
1205
1206                        next = (struct scsi_cmnd *) dq->host_scribble;
1207                        dq->scsi_done(dq);
1208                        dq = next;
1209                } while (dq != NULL);
1210        }
1211        spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1212
1213        return IRQ_HANDLED;
1214}
1215
1216static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1217{
1218        u_short param[6];
1219        struct Scsi_Host *host = Cmnd->device->host;
1220        struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1221        int return_status = SUCCESS;
1222        u32 cmd_cookie;
1223        int i;
1224
1225        printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1226               qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1227
1228        qlogicpti_disable_irqs(qpti);
1229
1230        /* Find the 32-bit cookie we gave to the firmware for
1231         * this command.
1232         */
1233        for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1234                if (qpti->cmd_slots[i] == Cmnd)
1235                        break;
1236        cmd_cookie = i;
1237
1238        param[0] = MBOX_ABORT;
1239        param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1240        param[2] = cmd_cookie >> 16;
1241        param[3] = cmd_cookie & 0xffff;
1242        if (qlogicpti_mbox_command(qpti, param, 0) ||
1243            (param[0] != MBOX_COMMAND_COMPLETE)) {
1244                printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1245                       qpti->qpti_id, param[0]);
1246                return_status = FAILED;
1247        }
1248
1249        qlogicpti_enable_irqs(qpti);
1250
1251        return return_status;
1252}
1253
1254static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1255{
1256        u_short param[6];
1257        struct Scsi_Host *host = Cmnd->device->host;
1258        struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1259        int return_status = SUCCESS;
1260
1261        printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1262               qpti->qpti_id);
1263
1264        qlogicpti_disable_irqs(qpti);
1265
1266        param[0] = MBOX_BUS_RESET;
1267        param[1] = qpti->host_param.bus_reset_delay;
1268        if (qlogicpti_mbox_command(qpti, param, 0) ||
1269           (param[0] != MBOX_COMMAND_COMPLETE)) {
1270                printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1271                       qpti->qpti_id, param[0]);
1272                return_status = FAILED;
1273        }
1274
1275        qlogicpti_enable_irqs(qpti);
1276
1277        return return_status;
1278}
1279
1280static struct scsi_host_template qpti_template = {
1281        .module                 = THIS_MODULE,
1282        .name                   = "qlogicpti",
1283        .info                   = qlogicpti_info,
1284        .queuecommand           = qlogicpti_queuecommand,
1285        .slave_configure        = qlogicpti_slave_configure,
1286        .eh_abort_handler       = qlogicpti_abort,
1287        .eh_bus_reset_handler   = qlogicpti_reset,
1288        .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1289        .this_id                = 7,
1290        .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1291        .cmd_per_lun            = 1,
1292        .use_clustering         = ENABLE_CLUSTERING,
1293};
1294
1295static const struct of_device_id qpti_match[];
1296static int __devinit qpti_sbus_probe(struct platform_device *op)
1297{
1298        const struct of_device_id *match;
1299        struct scsi_host_template *tpnt;
1300        struct device_node *dp = op->dev.of_node;
1301        struct Scsi_Host *host;
1302        struct qlogicpti *qpti;
1303        static int nqptis;
1304        const char *fcode;
1305
1306        match = of_match_device(qpti_match, &op->dev);
1307        if (!match)
1308                return -EINVAL;
1309        tpnt = match->data;
1310
1311        /* Sometimes Antares cards come up not completely
1312         * setup, and we get a report of a zero IRQ.
1313         */
1314        if (op->archdata.irqs[0] == 0)
1315                return -ENODEV;
1316
1317        host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1318        if (!host)
1319                return -ENOMEM;
1320
1321        qpti = shost_priv(host);
1322
1323        host->max_id = MAX_TARGETS;
1324        qpti->qhost = host;
1325        qpti->op = op;
1326        qpti->qpti_id = nqptis;
1327        strcpy(qpti->prom_name, op->dev.of_node->name);
1328        qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1329
1330        if (qpti_map_regs(qpti) < 0)
1331                goto fail_unlink;
1332
1333        if (qpti_register_irq(qpti) < 0)
1334                goto fail_unmap_regs;
1335
1336        qpti_get_scsi_id(qpti);
1337        qpti_get_bursts(qpti);
1338        qpti_get_clock(qpti);
1339
1340        /* Clear out scsi_cmnd array. */
1341        memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1342
1343        if (qpti_map_queues(qpti) < 0)
1344                goto fail_free_irq;
1345
1346        /* Load the firmware. */
1347        if (qlogicpti_load_firmware(qpti))
1348                goto fail_unmap_queues;
1349        if (qpti->is_pti) {
1350                /* Check the PTI status reg. */
1351                if (qlogicpti_verify_tmon(qpti))
1352                        goto fail_unmap_queues;
1353        }
1354
1355        /* Reset the ISP and init res/req queues. */
1356        if (qlogicpti_reset_hardware(host))
1357                goto fail_unmap_queues;
1358
1359        printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1360               qpti->fware_minrev, qpti->fware_micrev);
1361
1362        fcode = of_get_property(dp, "isp-fcode", NULL);
1363        if (fcode && fcode[0])
1364                printk("(FCode %s)", fcode);
1365        if (of_find_property(dp, "differential", NULL) != NULL)
1366                qpti->differential = 1;
1367                        
1368        printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1369                qpti->qpti_id,
1370                (qpti->ultra ? "Ultra" : "Fast"),
1371                (qpti->differential ? "differential" : "single ended"));
1372
1373        if (scsi_add_host(host, &op->dev)) {
1374                printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1375                goto fail_unmap_queues;
1376        }
1377
1378        dev_set_drvdata(&op->dev, qpti);
1379
1380        qpti_chain_add(qpti);
1381
1382        scsi_scan_host(host);
1383        nqptis++;
1384
1385        return 0;
1386
1387fail_unmap_queues:
1388#define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1389        dma_free_coherent(&op->dev,
1390                          QSIZE(RES_QUEUE_LEN),
1391                          qpti->res_cpu, qpti->res_dvma);
1392        dma_free_coherent(&op->dev,
1393                          QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1394                          qpti->req_cpu, qpti->req_dvma);
1395#undef QSIZE
1396
1397fail_unmap_regs:
1398        of_iounmap(&op->resource[0], qpti->qregs,
1399                   resource_size(&op->resource[0]));
1400        if (qpti->is_pti)
1401                of_iounmap(&op->resource[0], qpti->sreg,
1402                           sizeof(unsigned char));
1403
1404fail_free_irq:
1405        free_irq(qpti->irq, qpti);
1406
1407fail_unlink:
1408        scsi_host_put(host);
1409
1410        return -ENODEV;
1411}
1412
1413static int __devexit qpti_sbus_remove(struct platform_device *op)
1414{
1415        struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
1416
1417        qpti_chain_del(qpti);
1418
1419        scsi_remove_host(qpti->qhost);
1420
1421        /* Shut up the card. */
1422        sbus_writew(0, qpti->qregs + SBUS_CTRL);
1423
1424        /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1425        free_irq(qpti->irq, qpti);
1426
1427#define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1428        dma_free_coherent(&op->dev,
1429                          QSIZE(RES_QUEUE_LEN),
1430                          qpti->res_cpu, qpti->res_dvma);
1431        dma_free_coherent(&op->dev,
1432                          QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1433                          qpti->req_cpu, qpti->req_dvma);
1434#undef QSIZE
1435
1436        of_iounmap(&op->resource[0], qpti->qregs,
1437                   resource_size(&op->resource[0]));
1438        if (qpti->is_pti)
1439                of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
1440
1441        scsi_host_put(qpti->qhost);
1442
1443        return 0;
1444}
1445
1446static const struct of_device_id qpti_match[] = {
1447        {
1448                .name = "ptisp",
1449                .data = &qpti_template,
1450        },
1451        {
1452                .name = "PTI,ptisp",
1453                .data = &qpti_template,
1454        },
1455        {
1456                .name = "QLGC,isp",
1457                .data = &qpti_template,
1458        },
1459        {
1460                .name = "SUNW,isp",
1461                .data = &qpti_template,
1462        },
1463        {},
1464};
1465MODULE_DEVICE_TABLE(of, qpti_match);
1466
1467static struct platform_driver qpti_sbus_driver = {
1468        .driver = {
1469                .name = "qpti",
1470                .owner = THIS_MODULE,
1471                .of_match_table = qpti_match,
1472        },
1473        .probe          = qpti_sbus_probe,
1474        .remove         = __devexit_p(qpti_sbus_remove),
1475};
1476
1477static int __init qpti_init(void)
1478{
1479        return platform_driver_register(&qpti_sbus_driver);
1480}
1481
1482static void __exit qpti_exit(void)
1483{
1484        platform_driver_unregister(&qpti_sbus_driver);
1485}
1486
1487MODULE_DESCRIPTION("QlogicISP SBUS driver");
1488MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1489MODULE_LICENSE("GPL");
1490MODULE_VERSION("2.1");
1491MODULE_FIRMWARE("qlogic/isp1000.bin");
1492
1493module_init(qpti_init);
1494module_exit(qpti_exit);
1495
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