SAFE public projects git trees. - safe/jmp/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
  32 #include <asm/byteorder.h>
  33
  34 #include "qlogicpti.h"
  35
  36 #include <asm/dma.h>
  37 #include <asm/system.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 #include "qlogicpti_asm.c"
  57
  58 static struct qlogicpti *qptichain = NULL;
  59 static DEFINE_SPINLOCK(qptichain_lock);
  60
  61 #define PACKB(a, b)                     (((a)<<4)|(b))
  62
  63 static const u_char mbox_param[] = {
  64         PACKB(1, 1),    /* MBOX_NO_OP */
  65         PACKB(5, 5),    /* MBOX_LOAD_RAM */
  66         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  67         PACKB(5, 5),    /* MBOX_DUMP_RAM */
  68         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  69         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  70         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  71         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  72         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  73         PACKB(0, 0),    /* 0x0009 */
  74         PACKB(0, 0),    /* 0x000a */
  75         PACKB(0, 0),    /* 0x000b */
  76         PACKB(0, 0),    /* 0x000c */
  77         PACKB(0, 0),    /* 0x000d */
  78         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  79         PACKB(0, 0),    /* 0x000f */
  80         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  81         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  82         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  83         PACKB(2, 2),    /* MBOX_WAKE_UP */
  84         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  85         PACKB(4, 4),    /* MBOX_ABORT */
  86         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  87         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  88         PACKB(2, 2),    /* MBOX_BUS_RESET */
  89         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  90         PACKB(2, 3),    /* MBOX_START_QUEUE */
  91         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  92         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  93         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  94         PACKB(0, 0),    /* 0x001e */
  95         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  96         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  97         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
  98         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
  99         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
 100         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
 101         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
 102         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
 103         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
 104         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
 105         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
 106         PACKB(0, 0),    /* 0x002a */
 107         PACKB(0, 0),    /* 0x002b */
 108         PACKB(0, 0),    /* 0x002c */
 109         PACKB(0, 0),    /* 0x002d */
 110         PACKB(0, 0),    /* 0x002e */
 111         PACKB(0, 0),    /* 0x002f */
 112         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 113         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 114         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 115         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 116         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 117         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 118         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 119         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 120         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 121         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 122         PACKB(0, 0),    /* 0x003a */
 123         PACKB(0, 0),    /* 0x003b */
 124         PACKB(0, 0),    /* 0x003c */
 125         PACKB(0, 0),    /* 0x003d */
 126         PACKB(0, 0),    /* 0x003e */
 127         PACKB(0, 0),    /* 0x003f */
 128         PACKB(0, 0),    /* 0x0040 */
 129         PACKB(0, 0),    /* 0x0041 */
 130         PACKB(0, 0)     /* 0x0042 */
 131 };
 132
 133 #define MAX_MBOX_COMMAND        ARRAY_SIZE(mbox_param)
 134
 135 /* queue length's _must_ be power of two: */
 136 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 137 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 138                                                     QLOGICPTI_REQ_QUEUE_LEN)
 139 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 140
 141 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 142 {
 143         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 144                     qpti->qregs + SBUS_CTRL);
 145 }
 146
 147 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 148 {
 149         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 150 }
 151
 152 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 153 {
 154         u16 val;
 155         u8 bursts = qpti->bursts;
 156
 157 #if 0   /* It appears that at least PTI cards do not support
 158          * 64-byte bursts and that setting the B64 bit actually
 159          * is a nop and the chip ends up using the smallest burst
 160          * size. -DaveM
 161          */
 162         if (sbus_can_burst64() && (bursts & DMA_BURST64)) {
 163                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 164         } else
 165 #endif
 166         if (bursts & DMA_BURST32) {
 167                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 168         } else if (bursts & DMA_BURST16) {
 169                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 170         } else if (bursts & DMA_BURST8) {
 171                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 172         } else {
 173                 val = 0; /* No sbus bursts for you... */
 174         }
 175         sbus_writew(val, qpti->qregs + SBUS_CFG1);
 176 }
 177
 178 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 179 {
 180         int loop_count;
 181         u16 tmp;
 182
 183         if (mbox_param[param[0]] == 0)
 184                 return 1;
 185
 186         /* Set SBUS semaphore. */
 187         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 188         tmp |= SBUS_SEMAPHORE_LCK;
 189         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 190
 191         /* Wait for host IRQ bit to clear. */
 192         loop_count = DEFAULT_LOOP_COUNT;
 193         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 194                 barrier();
 195                 cpu_relax();
 196         }
 197         if (!loop_count)
 198                 printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
 199                        qpti->qpti_id);
 200
 201         /* Write mailbox command registers. */
 202         switch (mbox_param[param[0]] >> 4) {
 203         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 204         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 205         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 206         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 207         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 208         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 209         }
 210
 211         /* Clear RISC interrupt. */
 212         tmp = sbus_readw(qpti->qregs + HCCTRL);
 213         tmp |= HCCTRL_CRIRQ;
 214         sbus_writew(tmp, qpti->qregs + HCCTRL);
 215
 216         /* Clear SBUS semaphore. */
 217         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 218
 219         /* Set HOST interrupt. */
 220         tmp = sbus_readw(qpti->qregs + HCCTRL);
 221         tmp |= HCCTRL_SHIRQ;
 222         sbus_writew(tmp, qpti->qregs + HCCTRL);
 223
 224         /* Wait for HOST interrupt clears. */
 225         loop_count = DEFAULT_LOOP_COUNT;
 226         while (--loop_count &&
 227                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 228                 udelay(20);
 229         if (!loop_count)
 230                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
 231                        qpti->qpti_id, param[0]);
 232
 233         /* Wait for SBUS semaphore to get set. */
 234         loop_count = DEFAULT_LOOP_COUNT;
 235         while (--loop_count &&
 236                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 237                 udelay(20);
 238
 239                 /* Workaround for some buggy chips. */
 240                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 241                         break;
 242         }
 243         if (!loop_count)
 244                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
 245                        qpti->qpti_id, param[0]);
 246
 247         /* Wait for MBOX busy condition to go away. */
 248         loop_count = DEFAULT_LOOP_COUNT;
 249         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 250                 udelay(20);
 251         if (!loop_count)
 252                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
 253                        qpti->qpti_id, param[0]);
 254
 255         /* Read back output parameters. */
 256         switch (mbox_param[param[0]] & 0xf) {
 257         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 258         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 259         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 260         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 261         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 262         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 263         }
 264
 265         /* Clear RISC interrupt. */
 266         tmp = sbus_readw(qpti->qregs + HCCTRL);
 267         tmp |= HCCTRL_CRIRQ;
 268         sbus_writew(tmp, qpti->qregs + HCCTRL);
 269
 270         /* Release SBUS semaphore. */
 271         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 272         tmp &= ~(SBUS_SEMAPHORE_LCK);
 273         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 274
 275         /* We're done. */
 276         return 0;
 277 }
 278
 279 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 280 {
 281         int i;
 282
 283         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 284         qpti->host_param.bus_reset_delay = 3;
 285         qpti->host_param.retry_count = 0;
 286         qpti->host_param.retry_delay = 5;
 287         qpti->host_param.async_data_setup_time = 3;
 288         qpti->host_param.req_ack_active_negation = 1;
 289         qpti->host_param.data_line_active_negation = 1;
 290         qpti->host_param.data_dma_burst_enable = 1;
 291         qpti->host_param.command_dma_burst_enable = 1;
 292         qpti->host_param.tag_aging = 8;
 293         qpti->host_param.selection_timeout = 250;
 294         qpti->host_param.max_queue_depth = 256;
 295
 296         for(i = 0; i < MAX_TARGETS; i++) {
 297                 /*
 298                  * disconnect, parity, arq, reneg on reset, and, oddly enough
 299                  * tags...the midlayer's notion of tagged support has to match
 300                  * our device settings, and since we base whether we enable a
 301                  * tag on a  per-cmnd basis upon what the midlayer sez, we
 302                  * actually enable the capability here.
 303                  */
 304                 qpti->dev_param[i].device_flags = 0xcd;
 305                 qpti->dev_param[i].execution_throttle = 16;
 306                 if (qpti->ultra) {
 307                         qpti->dev_param[i].synchronous_period = 12;
 308                         qpti->dev_param[i].synchronous_offset = 8;
 309                 } else {
 310                         qpti->dev_param[i].synchronous_period = 25;
 311                         qpti->dev_param[i].synchronous_offset = 12;
 312                 }
 313                 qpti->dev_param[i].device_enable = 1;
 314         }
 315 }
 316
 317 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 318 {
 319         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 320         u_short param[6];
 321         unsigned short risc_code_addr;
 322         int loop_count, i;
 323         unsigned long flags;
 324
 325         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 326
 327         spin_lock_irqsave(host->host_lock, flags);
 328
 329         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 330
 331         /* Only reset the scsi bus if it is not free. */
 332         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 333                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 334                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 335                 udelay(400);
 336         }
 337
 338         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 339         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 340         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 341
 342         loop_count = DEFAULT_LOOP_COUNT;
 343         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 344                 udelay(20);
 345         if (!loop_count)
 346                 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
 347                        qpti->qpti_id);
 348
 349         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 350         set_sbus_cfg1(qpti);
 351         qlogicpti_enable_irqs(qpti);
 352
 353         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 354                 qpti->ultra = 1;
 355                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 356                             qpti->qregs + RISC_MTREG);
 357         } else {
 358                 qpti->ultra = 0;
 359                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 360                             qpti->qregs + RISC_MTREG);
 361         }
 362
 363         /* reset adapter and per-device default values. */
 364         /* do it after finding out whether we're ultra mode capable */
 365         qlogicpti_set_hostdev_defaults(qpti);
 366
 367         /* Release the RISC processor. */
 368         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 369
 370         /* Get RISC to start executing the firmware code. */
 371         param[0] = MBOX_EXEC_FIRMWARE;
 372         param[1] = risc_code_addr;
 373         if (qlogicpti_mbox_command(qpti, param, 1)) {
 374                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 375                        qpti->qpti_id);
 376                 spin_unlock_irqrestore(host->host_lock, flags);
 377                 return 1;
 378         }
 379
 380         /* Set initiator scsi ID. */
 381         param[0] = MBOX_SET_INIT_SCSI_ID;
 382         param[1] = qpti->host_param.initiator_scsi_id;
 383         if (qlogicpti_mbox_command(qpti, param, 1) ||
 384            (param[0] != MBOX_COMMAND_COMPLETE)) {
 385                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 386                        qpti->qpti_id);
 387                 spin_unlock_irqrestore(host->host_lock, flags);
 388                 return 1;
 389         }
 390
 391         /* Initialize state of the queues, both hw and sw. */
 392         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 393
 394         param[0] = MBOX_INIT_RES_QUEUE;
 395         param[1] = RES_QUEUE_LEN + 1;
 396         param[2] = (u_short) (qpti->res_dvma >> 16);
 397         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 398         param[4] = param[5] = 0;
 399         if (qlogicpti_mbox_command(qpti, param, 1)) {
 400                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 401                        qpti->qpti_id);
 402                 spin_unlock_irqrestore(host->host_lock, flags);
 403                 return 1;
 404         }
 405
 406         param[0] = MBOX_INIT_REQ_QUEUE;
 407         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 408         param[2] = (u_short) (qpti->req_dvma >> 16);
 409         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 410         param[4] = param[5] = 0;
 411         if (qlogicpti_mbox_command(qpti, param, 1)) {
 412                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 413                        qpti->qpti_id);
 414                 spin_unlock_irqrestore(host->host_lock, flags);
 415                 return 1;
 416         }
 417
 418         param[0] = MBOX_SET_RETRY_COUNT;
 419         param[1] = qpti->host_param.retry_count;
 420         param[2] = qpti->host_param.retry_delay;
 421         qlogicpti_mbox_command(qpti, param, 0);
 422
 423         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 424         param[1] = qpti->host_param.tag_aging;
 425         qlogicpti_mbox_command(qpti, param, 0);
 426
 427         for (i = 0; i < MAX_TARGETS; i++) {
 428                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 429                 param[1] = (i << 8);
 430                 qlogicpti_mbox_command(qpti, param, 0);
 431         }
 432
 433         param[0] = MBOX_GET_FIRMWARE_STATUS;
 434         qlogicpti_mbox_command(qpti, param, 0);
 435
 436         param[0] = MBOX_SET_SELECT_TIMEOUT;
 437         param[1] = qpti->host_param.selection_timeout;
 438         qlogicpti_mbox_command(qpti, param, 0);
 439
 440         for (i = 0; i < MAX_TARGETS; i++) {
 441                 param[0] = MBOX_SET_TARGET_PARAMS;
 442                 param[1] = (i << 8);
 443                 param[2] = (qpti->dev_param[i].device_flags << 8);
 444                 /*
 445                  * Since we're now loading 1.31 f/w, force narrow/async.
 446                  */
 447                 param[2] |= 0xc0;
 448                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 449                 qlogicpti_mbox_command(qpti, param, 0);
 450         }
 451
 452         /*
 453          * Always (sigh) do an initial bus reset (kicks f/w).
 454          */
 455         param[0] = MBOX_BUS_RESET;
 456         param[1] = qpti->host_param.bus_reset_delay;
 457         qlogicpti_mbox_command(qpti, param, 0);
 458         qpti->send_marker = 1;
 459
 460         spin_unlock_irqrestore(host->host_lock, flags);
 461         return 0;
 462 }
 463
 464 #define PTI_RESET_LIMIT 400
 465
 466 static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
 467 {
 468         struct Scsi_Host *host = qpti->qhost;
 469         unsigned short csum = 0;
 470         unsigned short param[6];
 471         unsigned short *risc_code, risc_code_addr, risc_code_length;
 472         unsigned long flags;
 473         int i, timeout;
 474
 475         risc_code = &sbus_risc_code01[0];
 476         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 477         risc_code_length = sbus_risc_code_length01;
 478
 479         spin_lock_irqsave(host->host_lock, flags);
 480
 481         /* Verify the checksum twice, one before loading it, and once
 482          * afterwards via the mailbox commands.
 483          */
 484         for (i = 0; i < risc_code_length; i++)
 485                 csum += risc_code[i];
 486         if (csum) {
 487                 spin_unlock_irqrestore(host->host_lock, flags);
 488                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 489                        qpti->qpti_id);
 490                 return 1;
 491         }
 492         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 493         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 494         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 495         timeout = PTI_RESET_LIMIT;
 496         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 497                 udelay(20);
 498         if (!timeout) {
 499                 spin_unlock_irqrestore(host->host_lock, flags);
 500                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 501                 return 1;
 502         }
 503
 504         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 505         mdelay(1);
 506
 507         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 508         set_sbus_cfg1(qpti);
 509         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 510
 511         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 512                 qpti->ultra = 1;
 513                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 514                             qpti->qregs + RISC_MTREG);
 515         } else {
 516                 qpti->ultra = 0;
 517                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 518                             qpti->qregs + RISC_MTREG);
 519         }
 520
 521         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 522
 523         /* Pin lines are only stable while RISC is paused. */
 524         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 525         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 526                 qpti->differential = 1;
 527         else
 528                 qpti->differential = 0;
 529         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 530
 531         /* This shouldn't be necessary- we've reset things so we should be
 532            running from the ROM now.. */
 533
 534         param[0] = MBOX_STOP_FIRMWARE;
 535         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 536         if (qlogicpti_mbox_command(qpti, param, 1)) {
 537                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 538                        qpti->qpti_id);
 539                 spin_unlock_irqrestore(host->host_lock, flags);
 540                 return 1;
 541         }
 542
 543         /* Load it up.. */
 544         for (i = 0; i < risc_code_length; i++) {
 545                 param[0] = MBOX_WRITE_RAM_WORD;
 546                 param[1] = risc_code_addr + i;
 547                 param[2] = risc_code[i];
 548                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 549                     param[0] != MBOX_COMMAND_COMPLETE) {
 550                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 551                                qpti->qpti_id);
 552                         spin_unlock_irqrestore(host->host_lock, flags);
 553                         return 1;
 554                 }
 555         }
 556
 557         /* Reset the ISP again. */
 558         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 559         mdelay(1);
 560
 561         qlogicpti_enable_irqs(qpti);
 562         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 563         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 564
 565         /* Ask ISP to verify the checksum of the new code. */
 566         param[0] = MBOX_VERIFY_CHECKSUM;
 567         param[1] = risc_code_addr;
 568         if (qlogicpti_mbox_command(qpti, param, 1) ||
 569             (param[0] != MBOX_COMMAND_COMPLETE)) {
 570                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 571                        qpti->qpti_id);
 572                 spin_unlock_irqrestore(host->host_lock, flags);
 573                 return 1;
 574         }
 575
 576         /* Start using newly downloaded firmware. */
 577         param[0] = MBOX_EXEC_FIRMWARE;
 578         param[1] = risc_code_addr;
 579         qlogicpti_mbox_command(qpti, param, 1);
 580
 581         param[0] = MBOX_ABOUT_FIRMWARE;
 582         if (qlogicpti_mbox_command(qpti, param, 1) ||
 583             (param[0] != MBOX_COMMAND_COMPLETE)) {
 584                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 585                        qpti->qpti_id);
 586                 spin_unlock_irqrestore(host->host_lock, flags);
 587                 return 1;
 588         }
 589
 590         /* Snag the major and minor revisions from the result. */
 591         qpti->fware_majrev = param[1];
 592         qpti->fware_minrev = param[2];
 593         qpti->fware_micrev = param[3];
 594
 595         /* Set the clock rate */
 596         param[0] = MBOX_SET_CLOCK_RATE;
 597         param[1] = qpti->clock;
 598         if (qlogicpti_mbox_command(qpti, param, 1) ||
 599             (param[0] != MBOX_COMMAND_COMPLETE)) {
 600                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 601                        qpti->qpti_id);
 602                 spin_unlock_irqrestore(host->host_lock, flags);
 603                 return 1;
 604         }
 605
 606         if (qpti->is_pti != 0) {
 607                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 608                 param[0] = MBOX_WRITE_RAM_WORD;
 609                 param[1] = 0xff80;
 610                 param[2] = (unsigned short) qpti->scsi_id;
 611                 qlogicpti_mbox_command(qpti, param, 1);
 612
 613                 param[0] = MBOX_WRITE_RAM_WORD;
 614                 param[1] = 0xff00;
 615                 param[2] = (unsigned short) 3;
 616                 qlogicpti_mbox_command(qpti, param, 1);
 617         }
 618
 619         spin_unlock_irqrestore(host->host_lock, flags);
 620         return 0;
 621 }
 622
 623 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 624 {
 625         int curstat = sbus_readb(qpti->sreg);
 626
 627         curstat &= 0xf0;
 628         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 629                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 630         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 631                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 632         if (curstat != qpti->swsreg) {
 633                 int error = 0;
 634                 if (curstat & SREG_FUSE) {
 635                         error++;
 636                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 637                 }
 638                 if (curstat & SREG_TPOWER) {
 639                         error++;
 640                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 641                 }
 642                 if (qpti->differential &&
 643                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 644                         error++;
 645                         printk("qlogicpti%d: You have a single ended device on a "
 646                                "differential bus!  Please fix!\n", qpti->qpti_id);
 647                 }
 648                 qpti->swsreg = curstat;
 649                 return error;
 650         }
 651         return 0;
 652 }
 653
 654 static irqreturn_t qpti_intr(int irq, void *dev_id);
 655
 656 static void __devinit qpti_chain_add(struct qlogicpti *qpti)
 657 {
 658         spin_lock_irq(&qptichain_lock);
 659         if (qptichain != NULL) {
 660                 struct qlogicpti *qlink = qptichain;
 661
 662                 while(qlink->next)
 663                         qlink = qlink->next;
 664                 qlink->next = qpti;
 665         } else {
 666                 qptichain = qpti;
 667         }
 668         qpti->next = NULL;
 669         spin_unlock_irq(&qptichain_lock);
 670 }
 671
 672 static void __devexit qpti_chain_del(struct qlogicpti *qpti)
 673 {
 674         spin_lock_irq(&qptichain_lock);
 675         if (qptichain == qpti) {
 676                 qptichain = qpti->next;
 677         } else {
 678                 struct qlogicpti *qlink = qptichain;
 679                 while(qlink->next != qpti)
 680                         qlink = qlink->next;
 681                 qlink->next = qpti->next;
 682         }
 683         qpti->next = NULL;
 684         spin_unlock_irq(&qptichain_lock);
 685 }
 686
 687 static int __devinit qpti_map_regs(struct qlogicpti *qpti)
 688 {
 689         struct of_device *op = qpti->op;
 690
 691         qpti->qregs = of_ioremap(&op->resource[0], 0,
 692                                  resource_size(&op->resource[0]),
 693                                  "PTI Qlogic/ISP");
 694         if (!qpti->qregs) {
 695                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 696                 return -1;
 697         }
 698         if (qpti->is_pti) {
 699                 qpti->sreg = of_ioremap(&op->resource[0], (16 * 4096),
 700                                         sizeof(unsigned char),
 701                                         "PTI Qlogic/ISP statreg");
 702                 if (!qpti->sreg) {
 703                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 704                         return -1;
 705                 }
 706         }
 707         return 0;
 708 }
 709
 710 static int __devinit qpti_register_irq(struct qlogicpti *qpti)
 711 {
 712         struct of_device *op = qpti->op;
 713
 714         qpti->qhost->irq = qpti->irq = op->irqs[0];
 715
 716         /* We used to try various overly-clever things to
 717          * reduce the interrupt processing overhead on
 718          * sun4c/sun4m when multiple PTI's shared the
 719          * same IRQ.  It was too complex and messy to
 720          * sanely maintain.
 721          */
 722         if (request_irq(qpti->irq, qpti_intr,
 723                         IRQF_SHARED, "Qlogic/PTI", qpti))
 724                 goto fail;
 725
 726         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 727
 728         return 0;
 729
 730 fail:
 731         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 732         return -1;
 733 }
 734
 735 static void __devinit qpti_get_scsi_id(struct qlogicpti *qpti)
 736 {
 737         struct of_device *op = qpti->op;
 738         struct device_node *dp;
 739
 740         dp = op->node;
 741
 742         qpti->scsi_id = of_getintprop_default(dp, "initiator-id", -1);
 743         if (qpti->scsi_id == -1)
 744                 qpti->scsi_id = of_getintprop_default(dp, "scsi-initiator-id",
 745                                                       -1);
 746         if (qpti->scsi_id == -1)
 747                 qpti->scsi_id =
 748                         of_getintprop_default(dp->parent,
 749                                               "scsi-initiator-id", 7);
 750         qpti->qhost->this_id = qpti->scsi_id;
 751         qpti->qhost->max_sectors = 64;
 752
 753         printk("SCSI ID %d ", qpti->scsi_id);
 754 }
 755
 756 static void qpti_get_bursts(struct qlogicpti *qpti)
 757 {
 758         struct of_device *op = qpti->op;
 759         u8 bursts, bmask;
 760
 761         bursts = of_getintprop_default(op->node, "burst-sizes", 0xff);
 762         bmask = of_getintprop_default(op->node->parent, "burst-sizes", 0xff);
 763         if (bmask != 0xff)
 764                 bursts &= bmask;
 765         if (bursts == 0xff ||
 766             (bursts & DMA_BURST16) == 0 ||
 767             (bursts & DMA_BURST32) == 0)
 768                 bursts = (DMA_BURST32 - 1);
 769
 770         qpti->bursts = bursts;
 771 }
 772
 773 static void qpti_get_clock(struct qlogicpti *qpti)
 774 {
 775         unsigned int cfreq;
 776
 777         /* Check for what the clock input to this card is.
 778          * Default to 40Mhz.
 779          */
 780         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 781         qpti->clock = (cfreq + 500000)/1000000;
 782         if (qpti->clock == 0) /* bullshit */
 783                 qpti->clock = 40;
 784 }
 785
 786 /* The request and response queues must each be aligned
 787  * on a page boundary.
 788  */
 789 static int __devinit qpti_map_queues(struct qlogicpti *qpti)
 790 {
 791         struct of_device *op = qpti->op;
 792
 793 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 794         qpti->res_cpu = dma_alloc_coherent(&op->dev,
 795                                            QSIZE(RES_QUEUE_LEN),
 796                                            &qpti->res_dvma, GFP_ATOMIC);
 797         if (qpti->res_cpu == NULL ||
 798             qpti->res_dvma == 0) {
 799                 printk("QPTI: Cannot map response queue.\n");
 800                 return -1;
 801         }
 802
 803         qpti->req_cpu = dma_alloc_coherent(&op->dev,
 804                                            QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 805                                            &qpti->req_dvma, GFP_ATOMIC);
 806         if (qpti->req_cpu == NULL ||
 807             qpti->req_dvma == 0) {
 808                 dma_free_coherent(&op->dev, QSIZE(RES_QUEUE_LEN),
 809                                   qpti->res_cpu, qpti->res_dvma);
 810                 printk("QPTI: Cannot map request queue.\n");
 811                 return -1;
 812         }
 813         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 814         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 815         return 0;
 816 }
 817
 818 const char *qlogicpti_info(struct Scsi_Host *host)
 819 {
 820         static char buf[80];
 821         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 822
 823         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
 824                 qpti->qhost->irq, qpti->qregs);
 825         return buf;
 826 }
 827
 828 /* I am a certified frobtronicist. */
 829 static inline void marker_frob(struct Command_Entry *cmd)
 830 {
 831         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 832
 833         memset(marker, 0, sizeof(struct Marker_Entry));
 834         marker->hdr.entry_cnt = 1;
 835         marker->hdr.entry_type = ENTRY_MARKER;
 836         marker->modifier = SYNC_ALL;
 837         marker->rsvd = 0;
 838 }
 839
 840 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
 841                             struct qlogicpti *qpti)
 842 {
 843         memset(cmd, 0, sizeof(struct Command_Entry));
 844         cmd->hdr.entry_cnt = 1;
 845         cmd->hdr.entry_type = ENTRY_COMMAND;
 846         cmd->target_id = Cmnd->device->id;
 847         cmd->target_lun = Cmnd->device->lun;
 848         cmd->cdb_length = Cmnd->cmd_len;
 849         cmd->control_flags = 0;
 850         if (Cmnd->device->tagged_supported) {
 851                 if (qpti->cmd_count[Cmnd->device->id] == 0)
 852                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 853                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
 854                         cmd->control_flags = CFLAG_ORDERED_TAG;
 855                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 856                 } else
 857                         cmd->control_flags = CFLAG_SIMPLE_TAG;
 858         }
 859         if ((Cmnd->cmnd[0] == WRITE_6) ||
 860             (Cmnd->cmnd[0] == WRITE_10) ||
 861             (Cmnd->cmnd[0] == WRITE_12))
 862                 cmd->control_flags |= CFLAG_WRITE;
 863         else
 864                 cmd->control_flags |= CFLAG_READ;
 865         cmd->time_out = 30;
 866         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
 867 }
 868
 869 /* Do it to it baby. */
 870 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
 871                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
 872 {
 873         struct dataseg *ds;
 874         struct scatterlist *sg, *s;
 875         int i, n;
 876
 877         if (scsi_bufflen(Cmnd)) {
 878                 int sg_count;
 879
 880                 sg = scsi_sglist(Cmnd);
 881                 sg_count = dma_map_sg(&qpti->op->dev, sg,
 882                                       scsi_sg_count(Cmnd),
 883                                       Cmnd->sc_data_direction);
 884
 885                 ds = cmd->dataseg;
 886                 cmd->segment_cnt = sg_count;
 887
 888                 /* Fill in first four sg entries: */
 889                 n = sg_count;
 890                 if (n > 4)
 891                         n = 4;
 892                 for_each_sg(sg, s, n, i) {
 893                         ds[i].d_base = sg_dma_address(s);
 894                         ds[i].d_count = sg_dma_len(s);
 895                 }
 896                 sg_count -= 4;
 897                 sg = s;
 898                 while (sg_count > 0) {
 899                         struct Continuation_Entry *cont;
 900
 901                         ++cmd->hdr.entry_cnt;
 902                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
 903                         in_ptr = NEXT_REQ_PTR(in_ptr);
 904                         if (in_ptr == out_ptr)
 905                                 return -1;
 906
 907                         cont->hdr.entry_type = ENTRY_CONTINUATION;
 908                         cont->hdr.entry_cnt = 0;
 909                         cont->hdr.sys_def_1 = 0;
 910                         cont->hdr.flags = 0;
 911                         cont->reserved = 0;
 912                         ds = cont->dataseg;
 913                         n = sg_count;
 914                         if (n > 7)
 915                                 n = 7;
 916                         for_each_sg(sg, s, n, i) {
 917                                 ds[i].d_base = sg_dma_address(s);
 918                                 ds[i].d_count = sg_dma_len(s);
 919                         }
 920                         sg_count -= n;
 921                         sg = s;
 922                 }
 923         } else {
 924                 cmd->dataseg[0].d_base = 0;
 925                 cmd->dataseg[0].d_count = 0;
 926                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
 927         }
 928
 929         /* Committed, record Scsi_Cmd so we can find it later. */
 930         cmd->handle = in_ptr;
 931         qpti->cmd_slots[in_ptr] = Cmnd;
 932
 933         qpti->cmd_count[Cmnd->device->id]++;
 934         sbus_writew(in_ptr, qpti->qregs + MBOX4);
 935         qpti->req_in_ptr = in_ptr;
 936
 937         return in_ptr;
 938 }
 939
 940 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
 941 {
 942         /* Temporary workaround until bug is found and fixed (one bug has been found
 943            already, but fixing it makes things even worse) -jj */
 944         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
 945         host->can_queue = host->host_busy + num_free;
 946         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
 947 }
 948
 949 static int qlogicpti_slave_configure(struct scsi_device *sdev)
 950 {
 951         struct qlogicpti *qpti = shost_priv(sdev->host);
 952         int tgt = sdev->id;
 953         u_short param[6];
 954
 955         /* tags handled in midlayer */
 956         /* enable sync mode? */
 957         if (sdev->sdtr) {
 958                 qpti->dev_param[tgt].device_flags |= 0x10;
 959         } else {
 960                 qpti->dev_param[tgt].synchronous_offset = 0;
 961                 qpti->dev_param[tgt].synchronous_period = 0;
 962         }
 963         /* are we wide capable? */
 964         if (sdev->wdtr)
 965                 qpti->dev_param[tgt].device_flags |= 0x20;
 966
 967         param[0] = MBOX_SET_TARGET_PARAMS;
 968         param[1] = (tgt << 8);
 969         param[2] = (qpti->dev_param[tgt].device_flags << 8);
 970         if (qpti->dev_param[tgt].device_flags & 0x10) {
 971                 param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
 972                         qpti->dev_param[tgt].synchronous_period;
 973         } else {
 974                 param[3] = 0;
 975         }
 976         qlogicpti_mbox_command(qpti, param, 0);
 977         return 0;
 978 }
 979
 980 /*
 981  * The middle SCSI layer ensures that queuecommand never gets invoked
 982  * concurrently with itself or the interrupt handler (though the
 983  * interrupt handler may call this routine as part of
 984  * request-completion handling).
 985  *
 986  * "This code must fly." -davem
 987  */
 988 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
 989 {
 990         struct Scsi_Host *host = Cmnd->device->host;
 991         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 992         struct Command_Entry *cmd;
 993         u_int out_ptr;
 994         int in_ptr;
 995
 996         Cmnd->scsi_done = done;
 997
 998         in_ptr = qpti->req_in_ptr;
 999         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1000         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1001         in_ptr = NEXT_REQ_PTR(in_ptr);
1002         if (in_ptr == out_ptr)
1003                 goto toss_command;
1004
1005         if (qpti->send_marker) {
1006                 marker_frob(cmd);
1007                 qpti->send_marker = 0;
1008                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1009                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1010                         qpti->req_in_ptr = in_ptr;
1011                         goto toss_command;
1012                 }
1013                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1014                 in_ptr = NEXT_REQ_PTR(in_ptr);
1015         }
1016         cmd_frob(cmd, Cmnd, qpti);
1017         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1018                 goto toss_command;
1019
1020         update_can_queue(host, in_ptr, out_ptr);
1021
1022         return 0;
1023
1024 toss_command:
1025         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1026                qpti->qpti_id);
1027
1028         /* Unfortunately, unless you use the new EH code, which
1029          * we don't, the midlayer will ignore the return value,
1030          * which is insane.  We pick up the pieces like this.
1031          */
1032         Cmnd->result = DID_BUS_BUSY;
1033         done(Cmnd);
1034         return 1;
1035 }
1036
1037 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1038 {
1039         int host_status = DID_ERROR;
1040
1041         switch (sts->completion_status) {
1042               case CS_COMPLETE:
1043                 host_status = DID_OK;
1044                 break;
1045               case CS_INCOMPLETE:
1046                 if (!(sts->state_flags & SF_GOT_BUS))
1047                         host_status = DID_NO_CONNECT;
1048                 else if (!(sts->state_flags & SF_GOT_TARGET))
1049                         host_status = DID_BAD_TARGET;
1050                 else if (!(sts->state_flags & SF_SENT_CDB))
1051                         host_status = DID_ERROR;
1052                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1053                         host_status = DID_ERROR;
1054                 else if (!(sts->state_flags & SF_GOT_STATUS))
1055                         host_status = DID_ERROR;
1056                 else if (!(sts->state_flags & SF_GOT_SENSE))
1057                         host_status = DID_ERROR;
1058                 break;
1059               case CS_DMA_ERROR:
1060               case CS_TRANSPORT_ERROR:
1061                 host_status = DID_ERROR;
1062                 break;
1063               case CS_RESET_OCCURRED:
1064               case CS_BUS_RESET:
1065                 host_status = DID_RESET;
1066                 break;
1067               case CS_ABORTED:
1068                 host_status = DID_ABORT;
1069                 break;
1070               case CS_TIMEOUT:
1071                 host_status = DID_TIME_OUT;
1072                 break;
1073               case CS_DATA_OVERRUN:
1074               case CS_COMMAND_OVERRUN:
1075               case CS_STATUS_OVERRUN:
1076               case CS_BAD_MESSAGE:
1077               case CS_NO_MESSAGE_OUT:
1078               case CS_EXT_ID_FAILED:
1079               case CS_IDE_MSG_FAILED:
1080               case CS_ABORT_MSG_FAILED:
1081               case CS_NOP_MSG_FAILED:
1082               case CS_PARITY_ERROR_MSG_FAILED:
1083               case CS_DEVICE_RESET_MSG_FAILED:
1084               case CS_ID_MSG_FAILED:
1085               case CS_UNEXP_BUS_FREE:
1086                 host_status = DID_ERROR;
1087                 break;
1088               case CS_DATA_UNDERRUN:
1089                 host_status = DID_OK;
1090                 break;
1091               default:
1092                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1093                        id, sts->completion_status);
1094                 host_status = DID_ERROR;
1095                 break;
1096         }
1097
1098         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1099 }
1100
1101 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1102 {
1103         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1104         struct Status_Entry *sts;
1105         u_int in_ptr, out_ptr;
1106
1107         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1108                 return NULL;
1109
1110         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1111         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1112         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1113                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1114                 case ASYNC_SCSI_BUS_RESET:
1115                 case EXECUTION_TIMEOUT_RESET:
1116                         qpti->send_marker = 1;
1117                         break;
1118                 case INVALID_COMMAND:
1119                 case HOST_INTERFACE_ERROR:
1120                 case COMMAND_ERROR:
1121                 case COMMAND_PARAM_ERROR:
1122                         break;
1123                 };
1124                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1125         }
1126
1127         /* This looks like a network driver! */
1128         out_ptr = qpti->res_out_ptr;
1129         while (out_ptr != in_ptr) {
1130                 u_int cmd_slot;
1131
1132                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1133                 out_ptr = NEXT_RES_PTR(out_ptr);
1134
1135                 /* We store an index in the handle, not the pointer in
1136                  * some form.  This avoids problems due to the fact
1137                  * that the handle provided is only 32-bits. -DaveM
1138                  */
1139                 cmd_slot = sts->handle;
1140                 Cmnd = qpti->cmd_slots[cmd_slot];
1141                 qpti->cmd_slots[cmd_slot] = NULL;
1142
1143                 if (sts->completion_status == CS_RESET_OCCURRED ||
1144                     sts->completion_status == CS_ABORTED ||
1145                     (sts->status_flags & STF_BUS_RESET))
1146                         qpti->send_marker = 1;
1147
1148                 if (sts->state_flags & SF_GOT_SENSE)
1149                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1150                                SCSI_SENSE_BUFFERSIZE);
1151
1152                 if (sts->hdr.entry_type == ENTRY_STATUS)
1153                         Cmnd->result =
1154                             qlogicpti_return_status(sts, qpti->qpti_id);
1155                 else
1156                         Cmnd->result = DID_ERROR << 16;
1157
1158                 if (scsi_bufflen(Cmnd))
1159                         dma_unmap_sg(&qpti->op->dev,
1160                                      scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
1161                                      Cmnd->sc_data_direction);
1162
1163                 qpti->cmd_count[Cmnd->device->id]--;
1164                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1165                 Cmnd->host_scribble = (unsigned char *) done_queue;
1166                 done_queue = Cmnd;
1167         }
1168         qpti->res_out_ptr = out_ptr;
1169
1170         return done_queue;
1171 }
1172
1173 static irqreturn_t qpti_intr(int irq, void *dev_id)
1174 {
1175         struct qlogicpti *qpti = dev_id;
1176         unsigned long flags;
1177         struct scsi_cmnd *dq;
1178
1179         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1180         dq = qlogicpti_intr_handler(qpti);
1181
1182         if (dq != NULL) {
1183                 do {
1184                         struct scsi_cmnd *next;
1185
1186                         next = (struct scsi_cmnd *) dq->host_scribble;
1187                         dq->scsi_done(dq);
1188                         dq = next;
1189                 } while (dq != NULL);
1190         }
1191         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1192
1193         return IRQ_HANDLED;
1194 }
1195
1196 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1197 {
1198         u_short param[6];
1199         struct Scsi_Host *host = Cmnd->device->host;
1200         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1201         int return_status = SUCCESS;
1202         u32 cmd_cookie;
1203         int i;
1204
1205         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1206                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1207
1208         qlogicpti_disable_irqs(qpti);
1209
1210         /* Find the 32-bit cookie we gave to the firmware for
1211          * this command.
1212          */
1213         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1214                 if (qpti->cmd_slots[i] == Cmnd)
1215                         break;
1216         cmd_cookie = i;
1217
1218         param[0] = MBOX_ABORT;
1219         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1220         param[2] = cmd_cookie >> 16;
1221         param[3] = cmd_cookie & 0xffff;
1222         if (qlogicpti_mbox_command(qpti, param, 0) ||
1223             (param[0] != MBOX_COMMAND_COMPLETE)) {
1224                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1225                        qpti->qpti_id, param[0]);
1226                 return_status = FAILED;
1227         }
1228
1229         qlogicpti_enable_irqs(qpti);
1230
1231         return return_status;
1232 }
1233
1234 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1235 {
1236         u_short param[6];
1237         struct Scsi_Host *host = Cmnd->device->host;
1238         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1239         int return_status = SUCCESS;
1240
1241         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1242                qpti->qpti_id);
1243
1244         qlogicpti_disable_irqs(qpti);
1245
1246         param[0] = MBOX_BUS_RESET;
1247         param[1] = qpti->host_param.bus_reset_delay;
1248         if (qlogicpti_mbox_command(qpti, param, 0) ||
1249            (param[0] != MBOX_COMMAND_COMPLETE)) {
1250                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1251                        qpti->qpti_id, param[0]);
1252                 return_status = FAILED;
1253         }
1254
1255         qlogicpti_enable_irqs(qpti);
1256
1257         return return_status;
1258 }
1259
1260 static struct scsi_host_template qpti_template = {
1261         .module                 = THIS_MODULE,
1262         .name                   = "qlogicpti",
1263         .info                   = qlogicpti_info,
1264         .queuecommand           = qlogicpti_queuecommand,
1265         .slave_configure        = qlogicpti_slave_configure,
1266         .eh_abort_handler       = qlogicpti_abort,
1267         .eh_bus_reset_handler   = qlogicpti_reset,
1268         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1269         .this_id                = 7,
1270         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1271         .cmd_per_lun            = 1,
1272         .use_clustering         = ENABLE_CLUSTERING,
1273 };
1274
1275 static int __devinit qpti_sbus_probe(struct of_device *op, const struct of_device_id *match)
1276 {
1277         struct scsi_host_template *tpnt = match->data;
1278         struct device_node *dp = op->node;
1279         struct Scsi_Host *host;
1280         struct qlogicpti *qpti;
1281         static int nqptis;
1282         const char *fcode;
1283
1284         /* Sometimes Antares cards come up not completely
1285          * setup, and we get a report of a zero IRQ.
1286          */
1287         if (op->irqs[0] == 0)
1288                 return -ENODEV;
1289
1290         host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1291         if (!host)
1292                 return -ENOMEM;
1293
1294         qpti = shost_priv(host);
1295
1296         host->max_id = MAX_TARGETS;
1297         qpti->qhost = host;
1298         qpti->op = op;
1299         qpti->qpti_id = nqptis;
1300         strcpy(qpti->prom_name, op->node->name);
1301         qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1302
1303         if (qpti_map_regs(qpti) < 0)
1304                 goto fail_unlink;
1305
1306         if (qpti_register_irq(qpti) < 0)
1307                 goto fail_unmap_regs;
1308
1309         qpti_get_scsi_id(qpti);
1310         qpti_get_bursts(qpti);
1311         qpti_get_clock(qpti);
1312
1313         /* Clear out scsi_cmnd array. */
1314         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1315
1316         if (qpti_map_queues(qpti) < 0)
1317                 goto fail_free_irq;
1318
1319         /* Load the firmware. */
1320         if (qlogicpti_load_firmware(qpti))
1321                 goto fail_unmap_queues;
1322         if (qpti->is_pti) {
1323                 /* Check the PTI status reg. */
1324                 if (qlogicpti_verify_tmon(qpti))
1325                         goto fail_unmap_queues;
1326         }
1327
1328         /* Reset the ISP and init res/req queues. */
1329         if (qlogicpti_reset_hardware(host))
1330                 goto fail_unmap_queues;
1331
1332         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1333                qpti->fware_minrev, qpti->fware_micrev);
1334
1335         fcode = of_get_property(dp, "isp-fcode", NULL);
1336         if (fcode && fcode[0])
1337                 printk("(FCode %s)", fcode);
1338         if (of_find_property(dp, "differential", NULL) != NULL)
1339                 qpti->differential = 1;
1340
1341         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1342                 qpti->qpti_id,
1343                 (qpti->ultra ? "Ultra" : "Fast"),
1344                 (qpti->differential ? "differential" : "single ended"));
1345
1346         if (scsi_add_host(host, &op->dev)) {
1347                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1348                 goto fail_unmap_queues;
1349         }
1350
1351         dev_set_drvdata(&op->dev, qpti);
1352
1353         qpti_chain_add(qpti);
1354
1355         scsi_scan_host(host);
1356         nqptis++;
1357
1358         return 0;
1359
1360 fail_unmap_queues:
1361 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1362         dma_free_coherent(&op->dev,
1363                           QSIZE(RES_QUEUE_LEN),
1364                           qpti->res_cpu, qpti->res_dvma);
1365         dma_free_coherent(&op->dev,
1366                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1367                           qpti->req_cpu, qpti->req_dvma);
1368 #undef QSIZE
1369
1370 fail_unmap_regs:
1371         of_iounmap(&op->resource[0], qpti->qregs,
1372                    resource_size(&op->resource[0]));
1373         if (qpti->is_pti)
1374                 of_iounmap(&op->resource[0], qpti->sreg,
1375                            sizeof(unsigned char));
1376
1377 fail_free_irq:
1378         free_irq(qpti->irq, qpti);
1379
1380 fail_unlink:
1381         scsi_host_put(host);
1382
1383         return -ENODEV;
1384 }
1385
1386 static int __devexit qpti_sbus_remove(struct of_device *op)
1387 {
1388         struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
1389
1390         qpti_chain_del(qpti);
1391
1392         scsi_remove_host(qpti->qhost);
1393
1394         /* Shut up the card. */
1395         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1396
1397         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1398         free_irq(qpti->irq, qpti);
1399
1400 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1401         dma_free_coherent(&op->dev,
1402                           QSIZE(RES_QUEUE_LEN),
1403                           qpti->res_cpu, qpti->res_dvma);
1404         dma_free_coherent(&op->dev,
1405                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1406                           qpti->req_cpu, qpti->req_dvma);
1407 #undef QSIZE
1408
1409         of_iounmap(&op->resource[0], qpti->qregs,
1410                    resource_size(&op->resource[0]));
1411         if (qpti->is_pti)
1412                 of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
1413
1414         scsi_host_put(qpti->qhost);
1415
1416         return 0;
1417 }
1418
1419 static const struct of_device_id qpti_match[] = {
1420         {
1421                 .name = "ptisp",
1422                 .data = &qpti_template,
1423         },
1424         {
1425                 .name = "PTI,ptisp",
1426                 .data = &qpti_template,
1427         },
1428         {
1429                 .name = "QLGC,isp",
1430                 .data = &qpti_template,
1431         },
1432         {
1433                 .name = "SUNW,isp",
1434                 .data = &qpti_template,
1435         },
1436         {},
1437 };
1438 MODULE_DEVICE_TABLE(of, qpti_match);
1439
1440 static struct of_platform_driver qpti_sbus_driver = {
1441         .name           = "qpti",
1442         .match_table    = qpti_match,
1443         .probe          = qpti_sbus_probe,
1444         .remove         = __devexit_p(qpti_sbus_remove),
1445 };
1446
1447 static int __init qpti_init(void)
1448 {
1449         return of_register_driver(&qpti_sbus_driver, &of_bus_type);
1450 }
1451
1452 static void __exit qpti_exit(void)
1453 {
1454         of_unregister_driver(&qpti_sbus_driver);
1455 }
1456
1457 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1458 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1459 MODULE_LICENSE("GPL");
1460 MODULE_VERSION("2.1");
1461
1462 module_init(qpti_init);
1463 module_exit(qpti_exit);