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