git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qlogicpti.c

   1 /* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
   2  *
   3  * Copyright (C) 1996, 2006, 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/slab.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/init.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/module.h>
  27 #include <linux/jiffies.h>
  28 #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
  57 static struct qlogicpti *qptichain = NULL;
  58 static DEFINE_SPINLOCK(qptichain_lock);
  59
  60 #define PACKB(a, b)                     (((a)<<4)|(b))
  61
  62 static 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
 140 static 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
 146 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 147 {
 148         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 149 }
 150
 151 static 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
 177 static 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
 278 static 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
 316 static 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
 465 static 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
 634 out:
 635         spin_unlock_irqrestore(host->host_lock, flags);
 636 outfirm:
 637         release_firmware(fw);
 638         return err;
 639 }
 640
 641 static 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
 672 static irqreturn_t qpti_intr(int irq, void *dev_id);
 673
 674 static 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
 690 static 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
 705 static int __devinit qpti_map_regs(struct qlogicpti *qpti)
 706 {
 707         struct of_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
 728 static int __devinit qpti_register_irq(struct qlogicpti *qpti)
 729 {
 730         struct of_device *op = qpti->op;
 731
 732         qpti->qhost->irq = qpti->irq = op->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, "Qlogic/PTI", qpti))
 742                 goto fail;
 743
 744         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 745
 746         return 0;
 747
 748 fail:
 749         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 750         return -1;
 751 }
 752
 753 static void __devinit qpti_get_scsi_id(struct qlogicpti *qpti)
 754 {
 755         struct of_device *op = qpti->op;
 756         struct device_node *dp;
 757
 758         dp = op->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
 774 static void qpti_get_bursts(struct qlogicpti *qpti)
 775 {
 776         struct of_device *op = qpti->op;
 777         u8 bursts, bmask;
 778
 779         bursts = of_getintprop_default(op->node, "burst-sizes", 0xff);
 780         bmask = of_getintprop_default(op->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
 791 static 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  */
 807 static int __devinit qpti_map_queues(struct qlogicpti *qpti)
 808 {
 809         struct of_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
 836 const 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. */
 847 static 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
 858 static 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 = 30;
 884         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
 885 }
 886
 887 /* Do it to it baby. */
 888 static 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
 958 static 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
 967 static 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  */
1006 static int qlogicpti_queuecommand(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
1042 toss_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
1055 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1056 {
1057         int host_status = DID_ERROR;
1058
1059         switch (sts->completion_status) {
1060               case CS_COMPLETE:
1061                 host_status = DID_OK;
1062                 break;
1063               case CS_INCOMPLETE:
1064                 if (!(sts->state_flags & SF_GOT_BUS))
1065                         host_status = DID_NO_CONNECT;
1066                 else if (!(sts->state_flags & SF_GOT_TARGET))
1067                         host_status = DID_BAD_TARGET;
1068                 else if (!(sts->state_flags & SF_SENT_CDB))
1069                         host_status = DID_ERROR;
1070                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1071                         host_status = DID_ERROR;
1072                 else if (!(sts->state_flags & SF_GOT_STATUS))
1073                         host_status = DID_ERROR;
1074                 else if (!(sts->state_flags & SF_GOT_SENSE))
1075                         host_status = DID_ERROR;
1076                 break;
1077               case CS_DMA_ERROR:
1078               case CS_TRANSPORT_ERROR:
1079                 host_status = DID_ERROR;
1080                 break;
1081               case CS_RESET_OCCURRED:
1082               case CS_BUS_RESET:
1083                 host_status = DID_RESET;
1084                 break;
1085               case CS_ABORTED:
1086                 host_status = DID_ABORT;
1087                 break;
1088               case CS_TIMEOUT:
1089                 host_status = DID_TIME_OUT;
1090                 break;
1091               case CS_DATA_OVERRUN:
1092               case CS_COMMAND_OVERRUN:
1093               case CS_STATUS_OVERRUN:
1094               case CS_BAD_MESSAGE:
1095               case CS_NO_MESSAGE_OUT:
1096               case CS_EXT_ID_FAILED:
1097               case CS_IDE_MSG_FAILED:
1098               case CS_ABORT_MSG_FAILED:
1099               case CS_NOP_MSG_FAILED:
1100               case CS_PARITY_ERROR_MSG_FAILED:
1101               case CS_DEVICE_RESET_MSG_FAILED:
1102               case CS_ID_MSG_FAILED:
1103               case CS_UNEXP_BUS_FREE:
1104                 host_status = DID_ERROR;
1105                 break;
1106               case CS_DATA_UNDERRUN:
1107                 host_status = DID_OK;
1108                 break;
1109               default:
1110                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1111                        id, sts->completion_status);
1112                 host_status = DID_ERROR;
1113                 break;
1114         }
1115
1116         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1117 }
1118
1119 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1120 {
1121         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1122         struct Status_Entry *sts;
1123         u_int in_ptr, out_ptr;
1124
1125         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1126                 return NULL;
1127
1128         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1129         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1130         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1131                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1132                 case ASYNC_SCSI_BUS_RESET:
1133                 case EXECUTION_TIMEOUT_RESET:
1134                         qpti->send_marker = 1;
1135                         break;
1136                 case INVALID_COMMAND:
1137                 case HOST_INTERFACE_ERROR:
1138                 case COMMAND_ERROR:
1139                 case COMMAND_PARAM_ERROR:
1140                         break;
1141                 };
1142                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1143         }
1144
1145         /* This looks like a network driver! */
1146         out_ptr = qpti->res_out_ptr;
1147         while (out_ptr != in_ptr) {
1148                 u_int cmd_slot;
1149
1150                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1151                 out_ptr = NEXT_RES_PTR(out_ptr);
1152
1153                 /* We store an index in the handle, not the pointer in
1154                  * some form.  This avoids problems due to the fact
1155                  * that the handle provided is only 32-bits. -DaveM
1156                  */
1157                 cmd_slot = sts->handle;
1158                 Cmnd = qpti->cmd_slots[cmd_slot];
1159                 qpti->cmd_slots[cmd_slot] = NULL;
1160
1161                 if (sts->completion_status == CS_RESET_OCCURRED ||
1162                     sts->completion_status == CS_ABORTED ||
1163                     (sts->status_flags & STF_BUS_RESET))
1164                         qpti->send_marker = 1;
1165
1166                 if (sts->state_flags & SF_GOT_SENSE)
1167                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1168                                SCSI_SENSE_BUFFERSIZE);
1169
1170                 if (sts->hdr.entry_type == ENTRY_STATUS)
1171                         Cmnd->result =
1172                             qlogicpti_return_status(sts, qpti->qpti_id);
1173                 else
1174                         Cmnd->result = DID_ERROR << 16;
1175
1176                 if (scsi_bufflen(Cmnd))
1177                         dma_unmap_sg(&qpti->op->dev,
1178                                      scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
1179                                      Cmnd->sc_data_direction);
1180
1181                 qpti->cmd_count[Cmnd->device->id]--;
1182                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1183                 Cmnd->host_scribble = (unsigned char *) done_queue;
1184                 done_queue = Cmnd;
1185         }
1186         qpti->res_out_ptr = out_ptr;
1187
1188         return done_queue;
1189 }
1190
1191 static irqreturn_t qpti_intr(int irq, void *dev_id)
1192 {
1193         struct qlogicpti *qpti = dev_id;
1194         unsigned long flags;
1195         struct scsi_cmnd *dq;
1196
1197         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1198         dq = qlogicpti_intr_handler(qpti);
1199
1200         if (dq != NULL) {
1201                 do {
1202                         struct scsi_cmnd *next;
1203
1204                         next = (struct scsi_cmnd *) dq->host_scribble;
1205                         dq->scsi_done(dq);
1206                         dq = next;
1207                 } while (dq != NULL);
1208         }
1209         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1210
1211         return IRQ_HANDLED;
1212 }
1213
1214 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1215 {
1216         u_short param[6];
1217         struct Scsi_Host *host = Cmnd->device->host;
1218         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1219         int return_status = SUCCESS;
1220         u32 cmd_cookie;
1221         int i;
1222
1223         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1224                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1225
1226         qlogicpti_disable_irqs(qpti);
1227
1228         /* Find the 32-bit cookie we gave to the firmware for
1229          * this command.
1230          */
1231         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1232                 if (qpti->cmd_slots[i] == Cmnd)
1233                         break;
1234         cmd_cookie = i;
1235
1236         param[0] = MBOX_ABORT;
1237         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1238         param[2] = cmd_cookie >> 16;
1239         param[3] = cmd_cookie & 0xffff;
1240         if (qlogicpti_mbox_command(qpti, param, 0) ||
1241             (param[0] != MBOX_COMMAND_COMPLETE)) {
1242                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1243                        qpti->qpti_id, param[0]);
1244                 return_status = FAILED;
1245         }
1246
1247         qlogicpti_enable_irqs(qpti);
1248
1249         return return_status;
1250 }
1251
1252 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1253 {
1254         u_short param[6];
1255         struct Scsi_Host *host = Cmnd->device->host;
1256         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1257         int return_status = SUCCESS;
1258
1259         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1260                qpti->qpti_id);
1261
1262         qlogicpti_disable_irqs(qpti);
1263
1264         param[0] = MBOX_BUS_RESET;
1265         param[1] = qpti->host_param.bus_reset_delay;
1266         if (qlogicpti_mbox_command(qpti, param, 0) ||
1267            (param[0] != MBOX_COMMAND_COMPLETE)) {
1268                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1269                        qpti->qpti_id, param[0]);
1270                 return_status = FAILED;
1271         }
1272
1273         qlogicpti_enable_irqs(qpti);
1274
1275         return return_status;
1276 }
1277
1278 static struct scsi_host_template qpti_template = {
1279         .module                 = THIS_MODULE,
1280         .name                   = "qlogicpti",
1281         .info                   = qlogicpti_info,
1282         .queuecommand           = qlogicpti_queuecommand,
1283         .slave_configure        = qlogicpti_slave_configure,
1284         .eh_abort_handler       = qlogicpti_abort,
1285         .eh_bus_reset_handler   = qlogicpti_reset,
1286         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1287         .this_id                = 7,
1288         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1289         .cmd_per_lun            = 1,
1290         .use_clustering         = ENABLE_CLUSTERING,
1291 };
1292
1293 static int __devinit qpti_sbus_probe(struct of_device *op, const struct of_device_id *match)
1294 {
1295         struct scsi_host_template *tpnt = match->data;
1296         struct device_node *dp = op->node;
1297         struct Scsi_Host *host;
1298         struct qlogicpti *qpti;
1299         static int nqptis;
1300         const char *fcode;
1301
1302         /* Sometimes Antares cards come up not completely
1303          * setup, and we get a report of a zero IRQ.
1304          */
1305         if (op->irqs[0] == 0)
1306                 return -ENODEV;
1307
1308         host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1309         if (!host)
1310                 return -ENOMEM;
1311
1312         qpti = shost_priv(host);
1313
1314         host->max_id = MAX_TARGETS;
1315         qpti->qhost = host;
1316         qpti->op = op;
1317         qpti->qpti_id = nqptis;
1318         strcpy(qpti->prom_name, op->node->name);
1319         qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1320
1321         if (qpti_map_regs(qpti) < 0)
1322                 goto fail_unlink;
1323
1324         if (qpti_register_irq(qpti) < 0)
1325                 goto fail_unmap_regs;
1326
1327         qpti_get_scsi_id(qpti);
1328         qpti_get_bursts(qpti);
1329         qpti_get_clock(qpti);
1330
1331         /* Clear out scsi_cmnd array. */
1332         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1333
1334         if (qpti_map_queues(qpti) < 0)
1335                 goto fail_free_irq;
1336
1337         /* Load the firmware. */
1338         if (qlogicpti_load_firmware(qpti))
1339                 goto fail_unmap_queues;
1340         if (qpti->is_pti) {
1341                 /* Check the PTI status reg. */
1342                 if (qlogicpti_verify_tmon(qpti))
1343                         goto fail_unmap_queues;
1344         }
1345
1346         /* Reset the ISP and init res/req queues. */
1347         if (qlogicpti_reset_hardware(host))
1348                 goto fail_unmap_queues;
1349
1350         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1351                qpti->fware_minrev, qpti->fware_micrev);
1352
1353         fcode = of_get_property(dp, "isp-fcode", NULL);
1354         if (fcode && fcode[0])
1355                 printk("(FCode %s)", fcode);
1356         if (of_find_property(dp, "differential", NULL) != NULL)
1357                 qpti->differential = 1;
1358
1359         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1360                 qpti->qpti_id,
1361                 (qpti->ultra ? "Ultra" : "Fast"),
1362                 (qpti->differential ? "differential" : "single ended"));
1363
1364         if (scsi_add_host(host, &op->dev)) {
1365                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1366                 goto fail_unmap_queues;
1367         }
1368
1369         dev_set_drvdata(&op->dev, qpti);
1370
1371         qpti_chain_add(qpti);
1372
1373         scsi_scan_host(host);
1374         nqptis++;
1375
1376         return 0;
1377
1378 fail_unmap_queues:
1379 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1380         dma_free_coherent(&op->dev,
1381                           QSIZE(RES_QUEUE_LEN),
1382                           qpti->res_cpu, qpti->res_dvma);
1383         dma_free_coherent(&op->dev,
1384                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1385                           qpti->req_cpu, qpti->req_dvma);
1386 #undef QSIZE
1387
1388 fail_unmap_regs:
1389         of_iounmap(&op->resource[0], qpti->qregs,
1390                    resource_size(&op->resource[0]));
1391         if (qpti->is_pti)
1392                 of_iounmap(&op->resource[0], qpti->sreg,
1393                            sizeof(unsigned char));
1394
1395 fail_free_irq:
1396         free_irq(qpti->irq, qpti);
1397
1398 fail_unlink:
1399         scsi_host_put(host);
1400
1401         return -ENODEV;
1402 }
1403
1404 static int __devexit qpti_sbus_remove(struct of_device *op)
1405 {
1406         struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
1407
1408         qpti_chain_del(qpti);
1409
1410         scsi_remove_host(qpti->qhost);
1411
1412         /* Shut up the card. */
1413         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1414
1415         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1416         free_irq(qpti->irq, qpti);
1417
1418 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1419         dma_free_coherent(&op->dev,
1420                           QSIZE(RES_QUEUE_LEN),
1421                           qpti->res_cpu, qpti->res_dvma);
1422         dma_free_coherent(&op->dev,
1423                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1424                           qpti->req_cpu, qpti->req_dvma);
1425 #undef QSIZE
1426
1427         of_iounmap(&op->resource[0], qpti->qregs,
1428                    resource_size(&op->resource[0]));
1429         if (qpti->is_pti)
1430                 of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
1431
1432         scsi_host_put(qpti->qhost);
1433
1434         return 0;
1435 }
1436
1437 static const struct of_device_id qpti_match[] = {
1438         {
1439                 .name = "ptisp",
1440                 .data = &qpti_template,
1441         },
1442         {
1443                 .name = "PTI,ptisp",
1444                 .data = &qpti_template,
1445         },
1446         {
1447                 .name = "QLGC,isp",
1448                 .data = &qpti_template,
1449         },
1450         {
1451                 .name = "SUNW,isp",
1452                 .data = &qpti_template,
1453         },
1454         {},
1455 };
1456 MODULE_DEVICE_TABLE(of, qpti_match);
1457
1458 static struct of_platform_driver qpti_sbus_driver = {
1459         .name           = "qpti",
1460         .match_table    = qpti_match,
1461         .probe          = qpti_sbus_probe,
1462         .remove         = __devexit_p(qpti_sbus_remove),
1463 };
1464
1465 static int __init qpti_init(void)
1466 {
1467         return of_register_driver(&qpti_sbus_driver, &of_bus_type);
1468 }
1469
1470 static void __exit qpti_exit(void)
1471 {
1472         of_unregister_driver(&qpti_sbus_driver);
1473 }
1474
1475 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1476 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1477 MODULE_LICENSE("GPL");
1478 MODULE_VERSION("2.1");
1479 MODULE_FIRMWARE("qlogic/isp1000.bin");
1480
1481 module_init(qpti_init);
1482 module_exit(qpti_exit);