drivers/scsi/qlogicpti.c

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This source file includes following definitions.
qlogicpti_enable_irqs
qlogicpti_disable_irqs
set_sbus_cfg1
qlogicpti_mbox_command
qlogicpti_set_hostdev_defaults
qlogicpti_reset_hardware
qlogicpti_load_firmware
qlogicpti_verify_tmon
qpti_chain_add
qpti_chain_del
qpti_map_regs
qpti_register_irq
qpti_get_scsi_id
qpti_get_bursts
qpti_get_clock
qpti_map_queues
qlogicpti_info
marker_frob
cmd_frob
load_cmd
update_can_queue
qlogicpti_slave_configure
qlogicpti_queuecommand_lck
DEF_SCSI_QCMD
qlogicpti_intr_handler
qpti_intr
qlogicpti_abort
qlogicpti_reset
qpti_sbus_probe
qpti_sbus_remove
qpti_init
qpti_exit
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
   3  *
   4  * Copyright (C) 1996, 2006, 2008 David S. Miller (davem@davemloft.net)
   5  *
   6  * A lot of this driver was directly stolen from Erik H. Moe's PCI
   7  * Qlogic ISP driver.  Mucho kudos to him for this code.
   8  *
   9  * An even bigger kudos to John Grana at Performance Technologies
  10  * for providing me with the hardware to write this driver, you rule
  11  * John you really do.
  12  *
  13  * May, 2, 1997: Added support for QLGC,isp --jj
  14  */
  15 
  16 #include <linux/kernel.h>
  17 #include <linux/delay.h>
  18 #include <linux/types.h>
  19 #include <linux/string.h>
  20 #include <linux/gfp.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/stat.h>
  24 #include <linux/init.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/module.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/dma-mapping.h>
  30 #include <linux/of.h>
  31 #include <linux/of_device.h>
  32 #include <linux/firmware.h>
  33 
  34 #include <asm/byteorder.h>
  35 
  36 #include "qlogicpti.h"
  37 
  38 #include <asm/dma.h>
  39 #include <asm/ptrace.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/oplib.h>
  42 #include <asm/io.h>
  43 #include <asm/irq.h>
  44 
  45 #include <scsi/scsi.h>
  46 #include <scsi/scsi_cmnd.h>
  47 #include <scsi/scsi_device.h>
  48 #include <scsi/scsi_eh.h>
  49 #include <scsi/scsi_tcq.h>
  50 #include <scsi/scsi_host.h>
  51 
  52 #define MAX_TARGETS     16
  53 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
  54 
  55 #define DEFAULT_LOOP_COUNT      10000
  56 
  57 static struct qlogicpti *qptichain = NULL;
  58 static DEFINE_SPINLOCK(qptichain_lock);
  59 
  60 #define PACKB(a, b)                     (((a)<<4)|(b))
  61 
  62 static const u_char mbox_param[] = {
  63         PACKB(1, 1),    /* MBOX_NO_OP */
  64         PACKB(5, 5),    /* MBOX_LOAD_RAM */
  65         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
  66         PACKB(5, 5),    /* MBOX_DUMP_RAM */
  67         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
  68         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
  69         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
  70         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
  71         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
  72         PACKB(0, 0),    /* 0x0009 */
  73         PACKB(0, 0),    /* 0x000a */
  74         PACKB(0, 0),    /* 0x000b */
  75         PACKB(0, 0),    /* 0x000c */
  76         PACKB(0, 0),    /* 0x000d */
  77         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
  78         PACKB(0, 0),    /* 0x000f */
  79         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
  80         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
  81         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
  82         PACKB(2, 2),    /* MBOX_WAKE_UP */
  83         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
  84         PACKB(4, 4),    /* MBOX_ABORT */
  85         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
  86         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
  87         PACKB(2, 2),    /* MBOX_BUS_RESET */
  88         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
  89         PACKB(2, 3),    /* MBOX_START_QUEUE */
  90         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
  91         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
  92         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
  93         PACKB(0, 0),    /* 0x001e */
  94         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
  95         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
  96         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
  97         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
  98         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
  99         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
 100         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
 101         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
 102         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
 103         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
 104         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
 105         PACKB(0, 0),    /* 0x002a */
 106         PACKB(0, 0),    /* 0x002b */
 107         PACKB(0, 0),    /* 0x002c */
 108         PACKB(0, 0),    /* 0x002d */
 109         PACKB(0, 0),    /* 0x002e */
 110         PACKB(0, 0),    /* 0x002f */
 111         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
 112         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
 113         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
 114         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
 115         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
 116         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
 117         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
 118         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
 119         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
 120         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
 121         PACKB(0, 0),    /* 0x003a */
 122         PACKB(0, 0),    /* 0x003b */
 123         PACKB(0, 0),    /* 0x003c */
 124         PACKB(0, 0),    /* 0x003d */
 125         PACKB(0, 0),    /* 0x003e */
 126         PACKB(0, 0),    /* 0x003f */
 127         PACKB(0, 0),    /* 0x0040 */
 128         PACKB(0, 0),    /* 0x0041 */
 129         PACKB(0, 0)     /* 0x0042 */
 130 };
 131 
 132 #define MAX_MBOX_COMMAND        ARRAY_SIZE(mbox_param)
 133 
 134 /* queue length's _must_ be power of two: */
 135 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
 136 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
 137                                                     QLOGICPTI_REQ_QUEUE_LEN)
 138 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
 139 
 140 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
 141 {
 142         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
 143                     qpti->qregs + SBUS_CTRL);
 144 }
 145 
 146 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
 147 {
 148         sbus_writew(0, qpti->qregs + SBUS_CTRL);
 149 }
 150 
 151 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
 152 {
 153         u16 val;
 154         u8 bursts = qpti->bursts;
 155 
 156 #if 0   /* It appears that at least PTI cards do not support
 157          * 64-byte bursts and that setting the B64 bit actually
 158          * is a nop and the chip ends up using the smallest burst
 159          * size. -DaveM
 160          */
 161         if (sbus_can_burst64() && (bursts & DMA_BURST64)) {
 162                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
 163         } else
 164 #endif
 165         if (bursts & DMA_BURST32) {
 166                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
 167         } else if (bursts & DMA_BURST16) {
 168                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
 169         } else if (bursts & DMA_BURST8) {
 170                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
 171         } else {
 172                 val = 0; /* No sbus bursts for you... */
 173         }
 174         sbus_writew(val, qpti->qregs + SBUS_CFG1);
 175 }
 176 
 177 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
 178 {
 179         int loop_count;
 180         u16 tmp;
 181 
 182         if (mbox_param[param[0]] == 0)
 183                 return 1;
 184 
 185         /* Set SBUS semaphore. */
 186         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 187         tmp |= SBUS_SEMAPHORE_LCK;
 188         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 189 
 190         /* Wait for host IRQ bit to clear. */
 191         loop_count = DEFAULT_LOOP_COUNT;
 192         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
 193                 barrier();
 194                 cpu_relax();
 195         }
 196         if (!loop_count)
 197                 printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
 198                        qpti->qpti_id);
 199 
 200         /* Write mailbox command registers. */
 201         switch (mbox_param[param[0]] >> 4) {
 202         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
 203                 /* Fall through */
 204         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
 205                 /* Fall through */
 206         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
 207                 /* Fall through */
 208         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
 209                 /* Fall through */
 210         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
 211                 /* Fall through */
 212         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 213         }
 214 
 215         /* Clear RISC interrupt. */
 216         tmp = sbus_readw(qpti->qregs + HCCTRL);
 217         tmp |= HCCTRL_CRIRQ;
 218         sbus_writew(tmp, qpti->qregs + HCCTRL);
 219 
 220         /* Clear SBUS semaphore. */
 221         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 222 
 223         /* Set HOST interrupt. */
 224         tmp = sbus_readw(qpti->qregs + HCCTRL);
 225         tmp |= HCCTRL_SHIRQ;
 226         sbus_writew(tmp, qpti->qregs + HCCTRL);
 227 
 228         /* Wait for HOST interrupt clears. */
 229         loop_count = DEFAULT_LOOP_COUNT;
 230         while (--loop_count &&
 231                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
 232                 udelay(20);
 233         if (!loop_count)
 234                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
 235                        qpti->qpti_id, param[0]);
 236 
 237         /* Wait for SBUS semaphore to get set. */
 238         loop_count = DEFAULT_LOOP_COUNT;
 239         while (--loop_count &&
 240                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
 241                 udelay(20);
 242 
 243                 /* Workaround for some buggy chips. */
 244                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
 245                         break;
 246         }
 247         if (!loop_count)
 248                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
 249                        qpti->qpti_id, param[0]);
 250 
 251         /* Wait for MBOX busy condition to go away. */
 252         loop_count = DEFAULT_LOOP_COUNT;
 253         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
 254                 udelay(20);
 255         if (!loop_count)
 256                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
 257                        qpti->qpti_id, param[0]);
 258 
 259         /* Read back output parameters. */
 260         switch (mbox_param[param[0]] & 0xf) {
 261         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
 262                 /* Fall through */
 263         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
 264                 /* Fall through */
 265         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
 266                 /* Fall through */
 267         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
 268                 /* Fall through */
 269         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
 270                 /* Fall through */
 271         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 272         }
 273 
 274         /* Clear RISC interrupt. */
 275         tmp = sbus_readw(qpti->qregs + HCCTRL);
 276         tmp |= HCCTRL_CRIRQ;
 277         sbus_writew(tmp, qpti->qregs + HCCTRL);
 278 
 279         /* Release SBUS semaphore. */
 280         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
 281         tmp &= ~(SBUS_SEMAPHORE_LCK);
 282         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
 283 
 284         /* We're done. */
 285         return 0;
 286 }
 287 
 288 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
 289 {
 290         int i;
 291 
 292         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
 293         qpti->host_param.bus_reset_delay = 3;
 294         qpti->host_param.retry_count = 0;
 295         qpti->host_param.retry_delay = 5;
 296         qpti->host_param.async_data_setup_time = 3;
 297         qpti->host_param.req_ack_active_negation = 1;
 298         qpti->host_param.data_line_active_negation = 1;
 299         qpti->host_param.data_dma_burst_enable = 1;
 300         qpti->host_param.command_dma_burst_enable = 1;
 301         qpti->host_param.tag_aging = 8;
 302         qpti->host_param.selection_timeout = 250;
 303         qpti->host_param.max_queue_depth = 256;
 304 
 305         for(i = 0; i < MAX_TARGETS; i++) {
 306                 /*
 307                  * disconnect, parity, arq, reneg on reset, and, oddly enough
 308                  * tags...the midlayer's notion of tagged support has to match
 309                  * our device settings, and since we base whether we enable a
 310                  * tag on a  per-cmnd basis upon what the midlayer sez, we
 311                  * actually enable the capability here.
 312                  */
 313                 qpti->dev_param[i].device_flags = 0xcd;
 314                 qpti->dev_param[i].execution_throttle = 16;
 315                 if (qpti->ultra) {
 316                         qpti->dev_param[i].synchronous_period = 12;
 317                         qpti->dev_param[i].synchronous_offset = 8;
 318                 } else {
 319                         qpti->dev_param[i].synchronous_period = 25;
 320                         qpti->dev_param[i].synchronous_offset = 12;
 321                 }
 322                 qpti->dev_param[i].device_enable = 1;
 323         }
 324 }
 325 
 326 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
 327 {
 328         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 329         u_short param[6];
 330         unsigned short risc_code_addr;
 331         int loop_count, i;
 332         unsigned long flags;
 333 
 334         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
 335 
 336         spin_lock_irqsave(host->host_lock, flags);
 337 
 338         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 339 
 340         /* Only reset the scsi bus if it is not free. */
 341         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
 342                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
 343                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
 344                 udelay(400);
 345         }
 346 
 347         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 348         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 349         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 350 
 351         loop_count = DEFAULT_LOOP_COUNT;
 352         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
 353                 udelay(20);
 354         if (!loop_count)
 355                 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
 356                        qpti->qpti_id);
 357 
 358         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 359         set_sbus_cfg1(qpti);
 360         qlogicpti_enable_irqs(qpti);
 361 
 362         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 363                 qpti->ultra = 1;
 364                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 365                             qpti->qregs + RISC_MTREG);
 366         } else {
 367                 qpti->ultra = 0;
 368                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 369                             qpti->qregs + RISC_MTREG);
 370         }
 371 
 372         /* reset adapter and per-device default values. */
 373         /* do it after finding out whether we're ultra mode capable */
 374         qlogicpti_set_hostdev_defaults(qpti);
 375 
 376         /* Release the RISC processor. */
 377         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 378 
 379         /* Get RISC to start executing the firmware code. */
 380         param[0] = MBOX_EXEC_FIRMWARE;
 381         param[1] = risc_code_addr;
 382         if (qlogicpti_mbox_command(qpti, param, 1)) {
 383                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
 384                        qpti->qpti_id);
 385                 spin_unlock_irqrestore(host->host_lock, flags);
 386                 return 1;
 387         }
 388 
 389         /* Set initiator scsi ID. */
 390         param[0] = MBOX_SET_INIT_SCSI_ID;
 391         param[1] = qpti->host_param.initiator_scsi_id;
 392         if (qlogicpti_mbox_command(qpti, param, 1) ||
 393            (param[0] != MBOX_COMMAND_COMPLETE)) {
 394                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
 395                        qpti->qpti_id);
 396                 spin_unlock_irqrestore(host->host_lock, flags);
 397                 return 1;
 398         }
 399 
 400         /* Initialize state of the queues, both hw and sw. */
 401         qpti->req_in_ptr = qpti->res_out_ptr = 0;
 402 
 403         param[0] = MBOX_INIT_RES_QUEUE;
 404         param[1] = RES_QUEUE_LEN + 1;
 405         param[2] = (u_short) (qpti->res_dvma >> 16);
 406         param[3] = (u_short) (qpti->res_dvma & 0xffff);
 407         param[4] = param[5] = 0;
 408         if (qlogicpti_mbox_command(qpti, param, 1)) {
 409                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
 410                        qpti->qpti_id);
 411                 spin_unlock_irqrestore(host->host_lock, flags);
 412                 return 1;
 413         }
 414 
 415         param[0] = MBOX_INIT_REQ_QUEUE;
 416         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
 417         param[2] = (u_short) (qpti->req_dvma >> 16);
 418         param[3] = (u_short) (qpti->req_dvma & 0xffff);
 419         param[4] = param[5] = 0;
 420         if (qlogicpti_mbox_command(qpti, param, 1)) {
 421                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
 422                        qpti->qpti_id);
 423                 spin_unlock_irqrestore(host->host_lock, flags);
 424                 return 1;
 425         }
 426 
 427         param[0] = MBOX_SET_RETRY_COUNT;
 428         param[1] = qpti->host_param.retry_count;
 429         param[2] = qpti->host_param.retry_delay;
 430         qlogicpti_mbox_command(qpti, param, 0);
 431 
 432         param[0] = MBOX_SET_TAG_AGE_LIMIT;
 433         param[1] = qpti->host_param.tag_aging;
 434         qlogicpti_mbox_command(qpti, param, 0);
 435 
 436         for (i = 0; i < MAX_TARGETS; i++) {
 437                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
 438                 param[1] = (i << 8);
 439                 qlogicpti_mbox_command(qpti, param, 0);
 440         }
 441 
 442         param[0] = MBOX_GET_FIRMWARE_STATUS;
 443         qlogicpti_mbox_command(qpti, param, 0);
 444 
 445         param[0] = MBOX_SET_SELECT_TIMEOUT;
 446         param[1] = qpti->host_param.selection_timeout;
 447         qlogicpti_mbox_command(qpti, param, 0);
 448 
 449         for (i = 0; i < MAX_TARGETS; i++) {
 450                 param[0] = MBOX_SET_TARGET_PARAMS;
 451                 param[1] = (i << 8);
 452                 param[2] = (qpti->dev_param[i].device_flags << 8);
 453                 /*
 454                  * Since we're now loading 1.31 f/w, force narrow/async.
 455                  */
 456                 param[2] |= 0xc0;
 457                 param[3] = 0;   /* no offset, we do not have sync mode yet */
 458                 qlogicpti_mbox_command(qpti, param, 0);
 459         }
 460 
 461         /*
 462          * Always (sigh) do an initial bus reset (kicks f/w).
 463          */
 464         param[0] = MBOX_BUS_RESET;
 465         param[1] = qpti->host_param.bus_reset_delay;
 466         qlogicpti_mbox_command(qpti, param, 0);
 467         qpti->send_marker = 1;
 468 
 469         spin_unlock_irqrestore(host->host_lock, flags);
 470         return 0;
 471 }
 472 
 473 #define PTI_RESET_LIMIT 400
 474 
 475 static int qlogicpti_load_firmware(struct qlogicpti *qpti)
 476 {
 477         const struct firmware *fw;
 478         const char fwname[] = "qlogic/isp1000.bin";
 479         const __le16 *fw_data;
 480         struct Scsi_Host *host = qpti->qhost;
 481         unsigned short csum = 0;
 482         unsigned short param[6];
 483         unsigned short risc_code_addr, risc_code_length;
 484         int err;
 485         unsigned long flags;
 486         int i, timeout;
 487 
 488         err = request_firmware(&fw, fwname, &qpti->op->dev);
 489         if (err) {
 490                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 491                        fwname, err);
 492                 return err;
 493         }
 494         if (fw->size % 2) {
 495                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
 496                        fw->size, fwname);
 497                 err = -EINVAL;
 498                 goto outfirm;
 499         }
 500         fw_data = (const __le16 *)&fw->data[0];
 501         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
 502         risc_code_length = fw->size / 2;
 503 
 504         spin_lock_irqsave(host->host_lock, flags);
 505 
 506         /* Verify the checksum twice, one before loading it, and once
 507          * afterwards via the mailbox commands.
 508          */
 509         for (i = 0; i < risc_code_length; i++)
 510                 csum += __le16_to_cpu(fw_data[i]);
 511         if (csum) {
 512                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
 513                        qpti->qpti_id);
 514                 err = 1;
 515                 goto out;
 516         }               
 517         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
 518         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
 519         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
 520         timeout = PTI_RESET_LIMIT;
 521         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
 522                 udelay(20);
 523         if (!timeout) {
 524                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
 525                 err = 1;
 526                 goto out;
 527         }
 528 
 529         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 530         mdelay(1);
 531 
 532         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
 533         set_sbus_cfg1(qpti);
 534         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 535 
 536         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
 537                 qpti->ultra = 1;
 538                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
 539                             qpti->qregs + RISC_MTREG);
 540         } else {
 541                 qpti->ultra = 0;
 542                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
 543                             qpti->qregs + RISC_MTREG);
 544         }
 545 
 546         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 547 
 548         /* Pin lines are only stable while RISC is paused. */
 549         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
 550         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
 551                 qpti->differential = 1;
 552         else
 553                 qpti->differential = 0;
 554         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 555 
 556         /* This shouldn't be necessary- we've reset things so we should be
 557            running from the ROM now.. */
 558 
 559         param[0] = MBOX_STOP_FIRMWARE;
 560         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
 561         if (qlogicpti_mbox_command(qpti, param, 1)) {
 562                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
 563                        qpti->qpti_id);
 564                 err = 1;
 565                 goto out;
 566         }               
 567 
 568         /* Load it up.. */
 569         for (i = 0; i < risc_code_length; i++) {
 570                 param[0] = MBOX_WRITE_RAM_WORD;
 571                 param[1] = risc_code_addr + i;
 572                 param[2] = __le16_to_cpu(fw_data[i]);
 573                 if (qlogicpti_mbox_command(qpti, param, 1) ||
 574                     param[0] != MBOX_COMMAND_COMPLETE) {
 575                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
 576                                qpti->qpti_id);
 577                         err = 1;
 578                         goto out;
 579                 }
 580         }
 581 
 582         /* Reset the ISP again. */
 583         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
 584         mdelay(1);
 585 
 586         qlogicpti_enable_irqs(qpti);
 587         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
 588         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
 589 
 590         /* Ask ISP to verify the checksum of the new code. */
 591         param[0] = MBOX_VERIFY_CHECKSUM;
 592         param[1] = risc_code_addr;
 593         if (qlogicpti_mbox_command(qpti, param, 1) ||
 594             (param[0] != MBOX_COMMAND_COMPLETE)) {
 595                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
 596                        qpti->qpti_id);
 597                 err = 1;
 598                 goto out;
 599         }
 600 
 601         /* Start using newly downloaded firmware. */
 602         param[0] = MBOX_EXEC_FIRMWARE;
 603         param[1] = risc_code_addr;
 604         qlogicpti_mbox_command(qpti, param, 1);
 605 
 606         param[0] = MBOX_ABOUT_FIRMWARE;
 607         if (qlogicpti_mbox_command(qpti, param, 1) ||
 608             (param[0] != MBOX_COMMAND_COMPLETE)) {
 609                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
 610                        qpti->qpti_id);
 611                 err = 1;
 612                 goto out;
 613         }
 614 
 615         /* Snag the major and minor revisions from the result. */
 616         qpti->fware_majrev = param[1];
 617         qpti->fware_minrev = param[2];
 618         qpti->fware_micrev = param[3];
 619 
 620         /* Set the clock rate */
 621         param[0] = MBOX_SET_CLOCK_RATE;
 622         param[1] = qpti->clock;
 623         if (qlogicpti_mbox_command(qpti, param, 1) ||
 624             (param[0] != MBOX_COMMAND_COMPLETE)) {
 625                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
 626                        qpti->qpti_id);
 627                 err = 1;
 628                 goto out;
 629         }
 630 
 631         if (qpti->is_pti != 0) {
 632                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
 633                 param[0] = MBOX_WRITE_RAM_WORD;
 634                 param[1] = 0xff80;
 635                 param[2] = (unsigned short) qpti->scsi_id;
 636                 qlogicpti_mbox_command(qpti, param, 1);
 637 
 638                 param[0] = MBOX_WRITE_RAM_WORD;
 639                 param[1] = 0xff00;
 640                 param[2] = (unsigned short) 3;
 641                 qlogicpti_mbox_command(qpti, param, 1);
 642         }
 643 
 644 out:
 645         spin_unlock_irqrestore(host->host_lock, flags);
 646 outfirm:
 647         release_firmware(fw);
 648         return err;
 649 }
 650 
 651 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
 652 {
 653         int curstat = sbus_readb(qpti->sreg);
 654 
 655         curstat &= 0xf0;
 656         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
 657                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
 658         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
 659                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
 660         if (curstat != qpti->swsreg) {
 661                 int error = 0;
 662                 if (curstat & SREG_FUSE) {
 663                         error++;
 664                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
 665                 }
 666                 if (curstat & SREG_TPOWER) {
 667                         error++;
 668                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
 669                 }
 670                 if (qpti->differential &&
 671                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
 672                         error++;
 673                         printk("qlogicpti%d: You have a single ended device on a "
 674                                "differential bus!  Please fix!\n", qpti->qpti_id);
 675                 }
 676                 qpti->swsreg = curstat;
 677                 return error;
 678         }
 679         return 0;
 680 }
 681 
 682 static irqreturn_t qpti_intr(int irq, void *dev_id);
 683 
 684 static void qpti_chain_add(struct qlogicpti *qpti)
 685 {
 686         spin_lock_irq(&qptichain_lock);
 687         if (qptichain != NULL) {
 688                 struct qlogicpti *qlink = qptichain;
 689 
 690                 while(qlink->next)
 691                         qlink = qlink->next;
 692                 qlink->next = qpti;
 693         } else {
 694                 qptichain = qpti;
 695         }
 696         qpti->next = NULL;
 697         spin_unlock_irq(&qptichain_lock);
 698 }
 699 
 700 static void qpti_chain_del(struct qlogicpti *qpti)
 701 {
 702         spin_lock_irq(&qptichain_lock);
 703         if (qptichain == qpti) {
 704                 qptichain = qpti->next;
 705         } else {
 706                 struct qlogicpti *qlink = qptichain;
 707                 while(qlink->next != qpti)
 708                         qlink = qlink->next;
 709                 qlink->next = qpti->next;
 710         }
 711         qpti->next = NULL;
 712         spin_unlock_irq(&qptichain_lock);
 713 }
 714 
 715 static int qpti_map_regs(struct qlogicpti *qpti)
 716 {
 717         struct platform_device *op = qpti->op;
 718 
 719         qpti->qregs = of_ioremap(&op->resource[0], 0,
 720                                  resource_size(&op->resource[0]),
 721                                  "PTI Qlogic/ISP");
 722         if (!qpti->qregs) {
 723                 printk("PTI: Qlogic/ISP registers are unmappable\n");
 724                 return -ENODEV;
 725         }
 726         if (qpti->is_pti) {
 727                 qpti->sreg = of_ioremap(&op->resource[0], (16 * 4096),
 728                                         sizeof(unsigned char),
 729                                         "PTI Qlogic/ISP statreg");
 730                 if (!qpti->sreg) {
 731                         printk("PTI: Qlogic/ISP status register is unmappable\n");
 732                         return -ENODEV;
 733                 }
 734         }
 735         return 0;
 736 }
 737 
 738 static int qpti_register_irq(struct qlogicpti *qpti)
 739 {
 740         struct platform_device *op = qpti->op;
 741 
 742         qpti->qhost->irq = qpti->irq = op->archdata.irqs[0];
 743 
 744         /* We used to try various overly-clever things to
 745          * reduce the interrupt processing overhead on
 746          * sun4c/sun4m when multiple PTI's shared the
 747          * same IRQ.  It was too complex and messy to
 748          * sanely maintain.
 749          */
 750         if (request_irq(qpti->irq, qpti_intr,
 751                         IRQF_SHARED, "QlogicPTI", qpti))
 752                 goto fail;
 753 
 754         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
 755 
 756         return 0;
 757 
 758 fail:
 759         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
 760         return -1;
 761 }
 762 
 763 static void qpti_get_scsi_id(struct qlogicpti *qpti)
 764 {
 765         struct platform_device *op = qpti->op;
 766         struct device_node *dp;
 767 
 768         dp = op->dev.of_node;
 769 
 770         qpti->scsi_id = of_getintprop_default(dp, "initiator-id", -1);
 771         if (qpti->scsi_id == -1)
 772                 qpti->scsi_id = of_getintprop_default(dp, "scsi-initiator-id",
 773                                                       -1);
 774         if (qpti->scsi_id == -1)
 775                 qpti->scsi_id =
 776                         of_getintprop_default(dp->parent,
 777                                               "scsi-initiator-id", 7);
 778         qpti->qhost->this_id = qpti->scsi_id;
 779         qpti->qhost->max_sectors = 64;
 780 
 781         printk("SCSI ID %d ", qpti->scsi_id);
 782 }
 783 
 784 static void qpti_get_bursts(struct qlogicpti *qpti)
 785 {
 786         struct platform_device *op = qpti->op;
 787         u8 bursts, bmask;
 788 
 789         bursts = of_getintprop_default(op->dev.of_node, "burst-sizes", 0xff);
 790         bmask = of_getintprop_default(op->dev.of_node->parent, "burst-sizes", 0xff);
 791         if (bmask != 0xff)
 792                 bursts &= bmask;
 793         if (bursts == 0xff ||
 794             (bursts & DMA_BURST16) == 0 ||
 795             (bursts & DMA_BURST32) == 0)
 796                 bursts = (DMA_BURST32 - 1);
 797 
 798         qpti->bursts = bursts;
 799 }
 800 
 801 static void qpti_get_clock(struct qlogicpti *qpti)
 802 {
 803         unsigned int cfreq;
 804 
 805         /* Check for what the clock input to this card is.
 806          * Default to 40Mhz.
 807          */
 808         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
 809         qpti->clock = (cfreq + 500000)/1000000;
 810         if (qpti->clock == 0) /* bullshit */
 811                 qpti->clock = 40;
 812 }
 813 
 814 /* The request and response queues must each be aligned
 815  * on a page boundary.
 816  */
 817 static int qpti_map_queues(struct qlogicpti *qpti)
 818 {
 819         struct platform_device *op = qpti->op;
 820 
 821 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
 822         qpti->res_cpu = dma_alloc_coherent(&op->dev,
 823                                            QSIZE(RES_QUEUE_LEN),
 824                                            &qpti->res_dvma, GFP_ATOMIC);
 825         if (qpti->res_cpu == NULL ||
 826             qpti->res_dvma == 0) {
 827                 printk("QPTI: Cannot map response queue.\n");
 828                 return -1;
 829         }
 830 
 831         qpti->req_cpu = dma_alloc_coherent(&op->dev,
 832                                            QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
 833                                            &qpti->req_dvma, GFP_ATOMIC);
 834         if (qpti->req_cpu == NULL ||
 835             qpti->req_dvma == 0) {
 836                 dma_free_coherent(&op->dev, QSIZE(RES_QUEUE_LEN),
 837                                   qpti->res_cpu, qpti->res_dvma);
 838                 printk("QPTI: Cannot map request queue.\n");
 839                 return -1;
 840         }
 841         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
 842         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
 843         return 0;
 844 }
 845 
 846 const char *qlogicpti_info(struct Scsi_Host *host)
 847 {
 848         static char buf[80];
 849         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
 850 
 851         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
 852                 qpti->qhost->irq, qpti->qregs);
 853         return buf;
 854 }
 855 
 856 /* I am a certified frobtronicist. */
 857 static inline void marker_frob(struct Command_Entry *cmd)
 858 {
 859         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
 860 
 861         memset(marker, 0, sizeof(struct Marker_Entry));
 862         marker->hdr.entry_cnt = 1;
 863         marker->hdr.entry_type = ENTRY_MARKER;
 864         marker->modifier = SYNC_ALL;
 865         marker->rsvd = 0;
 866 }
 867 
 868 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
 869                             struct qlogicpti *qpti)
 870 {
 871         memset(cmd, 0, sizeof(struct Command_Entry));
 872         cmd->hdr.entry_cnt = 1;
 873         cmd->hdr.entry_type = ENTRY_COMMAND;
 874         cmd->target_id = Cmnd->device->id;
 875         cmd->target_lun = Cmnd->device->lun;
 876         cmd->cdb_length = Cmnd->cmd_len;
 877         cmd->control_flags = 0;
 878         if (Cmnd->device->tagged_supported) {
 879                 if (qpti->cmd_count[Cmnd->device->id] == 0)
 880                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 881                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
 882                         cmd->control_flags = CFLAG_ORDERED_TAG;
 883                         qpti->tag_ages[Cmnd->device->id] = jiffies;
 884                 } else
 885                         cmd->control_flags = CFLAG_SIMPLE_TAG;
 886         }
 887         if ((Cmnd->cmnd[0] == WRITE_6) ||
 888             (Cmnd->cmnd[0] == WRITE_10) ||
 889             (Cmnd->cmnd[0] == WRITE_12))
 890                 cmd->control_flags |= CFLAG_WRITE;
 891         else
 892                 cmd->control_flags |= CFLAG_READ;
 893         cmd->time_out = Cmnd->request->timeout/HZ;
 894         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
 895 }
 896 
 897 /* Do it to it baby. */
 898 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
 899                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
 900 {
 901         struct dataseg *ds;
 902         struct scatterlist *sg, *s;
 903         int i, n;
 904 
 905         if (scsi_bufflen(Cmnd)) {
 906                 int sg_count;
 907 
 908                 sg = scsi_sglist(Cmnd);
 909                 sg_count = dma_map_sg(&qpti->op->dev, sg,
 910                                       scsi_sg_count(Cmnd),
 911                                       Cmnd->sc_data_direction);
 912 
 913                 ds = cmd->dataseg;
 914                 cmd->segment_cnt = sg_count;
 915 
 916                 /* Fill in first four sg entries: */
 917                 n = sg_count;
 918                 if (n > 4)
 919                         n = 4;
 920                 for_each_sg(sg, s, n, i) {
 921                         ds[i].d_base = sg_dma_address(s);
 922                         ds[i].d_count = sg_dma_len(s);
 923                 }
 924                 sg_count -= 4;
 925                 sg = s;
 926                 while (sg_count > 0) {
 927                         struct Continuation_Entry *cont;
 928 
 929                         ++cmd->hdr.entry_cnt;
 930                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
 931                         in_ptr = NEXT_REQ_PTR(in_ptr);
 932                         if (in_ptr == out_ptr)
 933                                 return -1;
 934 
 935                         cont->hdr.entry_type = ENTRY_CONTINUATION;
 936                         cont->hdr.entry_cnt = 0;
 937                         cont->hdr.sys_def_1 = 0;
 938                         cont->hdr.flags = 0;
 939                         cont->reserved = 0;
 940                         ds = cont->dataseg;
 941                         n = sg_count;
 942                         if (n > 7)
 943                                 n = 7;
 944                         for_each_sg(sg, s, n, i) {
 945                                 ds[i].d_base = sg_dma_address(s);
 946                                 ds[i].d_count = sg_dma_len(s);
 947                         }
 948                         sg_count -= n;
 949                         sg = s;
 950                 }
 951         } else {
 952                 cmd->dataseg[0].d_base = 0;
 953                 cmd->dataseg[0].d_count = 0;
 954                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
 955         }
 956 
 957         /* Committed, record Scsi_Cmd so we can find it later. */
 958         cmd->handle = in_ptr;
 959         qpti->cmd_slots[in_ptr] = Cmnd;
 960 
 961         qpti->cmd_count[Cmnd->device->id]++;
 962         sbus_writew(in_ptr, qpti->qregs + MBOX4);
 963         qpti->req_in_ptr = in_ptr;
 964 
 965         return in_ptr;
 966 }
 967 
 968 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
 969 {
 970         /* Temporary workaround until bug is found and fixed (one bug has been found
 971            already, but fixing it makes things even worse) -jj */
 972         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
 973         host->can_queue = scsi_host_busy(host) + num_free;
 974         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
 975 }
 976 
 977 static int qlogicpti_slave_configure(struct scsi_device *sdev)
 978 {
 979         struct qlogicpti *qpti = shost_priv(sdev->host);
 980         int tgt = sdev->id;
 981         u_short param[6];
 982 
 983         /* tags handled in midlayer */
 984         /* enable sync mode? */
 985         if (sdev->sdtr) {
 986                 qpti->dev_param[tgt].device_flags |= 0x10;
 987         } else {
 988                 qpti->dev_param[tgt].synchronous_offset = 0;
 989                 qpti->dev_param[tgt].synchronous_period = 0;
 990         }
 991         /* are we wide capable? */
 992         if (sdev->wdtr)
 993                 qpti->dev_param[tgt].device_flags |= 0x20;
 994 
 995         param[0] = MBOX_SET_TARGET_PARAMS;
 996         param[1] = (tgt << 8);
 997         param[2] = (qpti->dev_param[tgt].device_flags << 8);
 998         if (qpti->dev_param[tgt].device_flags & 0x10) {
 999                 param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
1000                         qpti->dev_param[tgt].synchronous_period;
1001         } else {
1002                 param[3] = 0;
1003         }
1004         qlogicpti_mbox_command(qpti, param, 0);
1005         return 0;
1006 }
1007 
1008 /*
1009  * The middle SCSI layer ensures that queuecommand never gets invoked
1010  * concurrently with itself or the interrupt handler (though the
1011  * interrupt handler may call this routine as part of
1012  * request-completion handling).
1013  *
1014  * "This code must fly." -davem
1015  */
1016 static int qlogicpti_queuecommand_lck(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1017 {
1018         struct Scsi_Host *host = Cmnd->device->host;
1019         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1020         struct Command_Entry *cmd;
1021         u_int out_ptr;
1022         int in_ptr;
1023 
1024         Cmnd->scsi_done = done;
1025 
1026         in_ptr = qpti->req_in_ptr;
1027         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1028         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1029         in_ptr = NEXT_REQ_PTR(in_ptr);
1030         if (in_ptr == out_ptr)
1031                 goto toss_command;
1032 
1033         if (qpti->send_marker) {
1034                 marker_frob(cmd);
1035                 qpti->send_marker = 0;
1036                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1037                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1038                         qpti->req_in_ptr = in_ptr;
1039                         goto toss_command;
1040                 }
1041                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1042                 in_ptr = NEXT_REQ_PTR(in_ptr);
1043         }
1044         cmd_frob(cmd, Cmnd, qpti);
1045         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1046                 goto toss_command;
1047 
1048         update_can_queue(host, in_ptr, out_ptr);
1049 
1050         return 0;
1051 
1052 toss_command:
1053         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1054                qpti->qpti_id);
1055 
1056         /* Unfortunately, unless you use the new EH code, which
1057          * we don't, the midlayer will ignore the return value,
1058          * which is insane.  We pick up the pieces like this.
1059          */
1060         Cmnd->result = DID_BUS_BUSY;
1061         done(Cmnd);
1062         return 1;
1063 }
1064 
1065 static DEF_SCSI_QCMD(qlogicpti_queuecommand)
1066 
1067 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1068 {
1069         int host_status = DID_ERROR;
1070 
1071         switch (sts->completion_status) {
1072               case CS_COMPLETE:
1073                 host_status = DID_OK;
1074                 break;
1075               case CS_INCOMPLETE:
1076                 if (!(sts->state_flags & SF_GOT_BUS))
1077                         host_status = DID_NO_CONNECT;
1078                 else if (!(sts->state_flags & SF_GOT_TARGET))
1079                         host_status = DID_BAD_TARGET;
1080                 else if (!(sts->state_flags & SF_SENT_CDB))
1081                         host_status = DID_ERROR;
1082                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1083                         host_status = DID_ERROR;
1084                 else if (!(sts->state_flags & SF_GOT_STATUS))
1085                         host_status = DID_ERROR;
1086                 else if (!(sts->state_flags & SF_GOT_SENSE))
1087                         host_status = DID_ERROR;
1088                 break;
1089               case CS_DMA_ERROR:
1090               case CS_TRANSPORT_ERROR:
1091                 host_status = DID_ERROR;
1092                 break;
1093               case CS_RESET_OCCURRED:
1094               case CS_BUS_RESET:
1095                 host_status = DID_RESET;
1096                 break;
1097               case CS_ABORTED:
1098                 host_status = DID_ABORT;
1099                 break;
1100               case CS_TIMEOUT:
1101                 host_status = DID_TIME_OUT;
1102                 break;
1103               case CS_DATA_OVERRUN:
1104               case CS_COMMAND_OVERRUN:
1105               case CS_STATUS_OVERRUN:
1106               case CS_BAD_MESSAGE:
1107               case CS_NO_MESSAGE_OUT:
1108               case CS_EXT_ID_FAILED:
1109               case CS_IDE_MSG_FAILED:
1110               case CS_ABORT_MSG_FAILED:
1111               case CS_NOP_MSG_FAILED:
1112               case CS_PARITY_ERROR_MSG_FAILED:
1113               case CS_DEVICE_RESET_MSG_FAILED:
1114               case CS_ID_MSG_FAILED:
1115               case CS_UNEXP_BUS_FREE:
1116                 host_status = DID_ERROR;
1117                 break;
1118               case CS_DATA_UNDERRUN:
1119                 host_status = DID_OK;
1120                 break;
1121               default:
1122                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1123                        id, sts->completion_status);
1124                 host_status = DID_ERROR;
1125                 break;
1126         }
1127 
1128         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1129 }
1130 
1131 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1132 {
1133         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1134         struct Status_Entry *sts;
1135         u_int in_ptr, out_ptr;
1136 
1137         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1138                 return NULL;
1139                 
1140         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1141         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1142         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1143                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1144                 case ASYNC_SCSI_BUS_RESET:
1145                 case EXECUTION_TIMEOUT_RESET:
1146                         qpti->send_marker = 1;
1147                         break;
1148                 case INVALID_COMMAND:
1149                 case HOST_INTERFACE_ERROR:
1150                 case COMMAND_ERROR:
1151                 case COMMAND_PARAM_ERROR:
1152                         break;
1153                 };
1154                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1155         }
1156 
1157         /* This looks like a network driver! */
1158         out_ptr = qpti->res_out_ptr;
1159         while (out_ptr != in_ptr) {
1160                 u_int cmd_slot;
1161 
1162                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1163                 out_ptr = NEXT_RES_PTR(out_ptr);
1164 
1165                 /* We store an index in the handle, not the pointer in
1166                  * some form.  This avoids problems due to the fact
1167                  * that the handle provided is only 32-bits. -DaveM
1168                  */
1169                 cmd_slot = sts->handle;
1170                 Cmnd = qpti->cmd_slots[cmd_slot];
1171                 qpti->cmd_slots[cmd_slot] = NULL;
1172 
1173                 if (sts->completion_status == CS_RESET_OCCURRED ||
1174                     sts->completion_status == CS_ABORTED ||
1175                     (sts->status_flags & STF_BUS_RESET))
1176                         qpti->send_marker = 1;
1177 
1178                 if (sts->state_flags & SF_GOT_SENSE)
1179                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1180                                SCSI_SENSE_BUFFERSIZE);
1181 
1182                 if (sts->hdr.entry_type == ENTRY_STATUS)
1183                         Cmnd->result =
1184                             qlogicpti_return_status(sts, qpti->qpti_id);
1185                 else
1186                         Cmnd->result = DID_ERROR << 16;
1187 
1188                 if (scsi_bufflen(Cmnd))
1189                         dma_unmap_sg(&qpti->op->dev,
1190                                      scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
1191                                      Cmnd->sc_data_direction);
1192 
1193                 qpti->cmd_count[Cmnd->device->id]--;
1194                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1195                 Cmnd->host_scribble = (unsigned char *) done_queue;
1196                 done_queue = Cmnd;
1197         }
1198         qpti->res_out_ptr = out_ptr;
1199 
1200         return done_queue;
1201 }
1202 
1203 static irqreturn_t qpti_intr(int irq, void *dev_id)
1204 {
1205         struct qlogicpti *qpti = dev_id;
1206         unsigned long flags;
1207         struct scsi_cmnd *dq;
1208 
1209         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1210         dq = qlogicpti_intr_handler(qpti);
1211 
1212         if (dq != NULL) {
1213                 do {
1214                         struct scsi_cmnd *next;
1215 
1216                         next = (struct scsi_cmnd *) dq->host_scribble;
1217                         dq->scsi_done(dq);
1218                         dq = next;
1219                 } while (dq != NULL);
1220         }
1221         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1222 
1223         return IRQ_HANDLED;
1224 }
1225 
1226 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1227 {
1228         u_short param[6];
1229         struct Scsi_Host *host = Cmnd->device->host;
1230         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1231         int return_status = SUCCESS;
1232         u32 cmd_cookie;
1233         int i;
1234 
1235         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1236                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1237 
1238         qlogicpti_disable_irqs(qpti);
1239 
1240         /* Find the 32-bit cookie we gave to the firmware for
1241          * this command.
1242          */
1243         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1244                 if (qpti->cmd_slots[i] == Cmnd)
1245                         break;
1246         cmd_cookie = i;
1247 
1248         param[0] = MBOX_ABORT;
1249         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1250         param[2] = cmd_cookie >> 16;
1251         param[3] = cmd_cookie & 0xffff;
1252         if (qlogicpti_mbox_command(qpti, param, 0) ||
1253             (param[0] != MBOX_COMMAND_COMPLETE)) {
1254                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1255                        qpti->qpti_id, param[0]);
1256                 return_status = FAILED;
1257         }
1258 
1259         qlogicpti_enable_irqs(qpti);
1260 
1261         return return_status;
1262 }
1263 
1264 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1265 {
1266         u_short param[6];
1267         struct Scsi_Host *host = Cmnd->device->host;
1268         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1269         int return_status = SUCCESS;
1270 
1271         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1272                qpti->qpti_id);
1273 
1274         qlogicpti_disable_irqs(qpti);
1275 
1276         param[0] = MBOX_BUS_RESET;
1277         param[1] = qpti->host_param.bus_reset_delay;
1278         if (qlogicpti_mbox_command(qpti, param, 0) ||
1279            (param[0] != MBOX_COMMAND_COMPLETE)) {
1280                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1281                        qpti->qpti_id, param[0]);
1282                 return_status = FAILED;
1283         }
1284 
1285         qlogicpti_enable_irqs(qpti);
1286 
1287         return return_status;
1288 }
1289 
1290 static struct scsi_host_template qpti_template = {
1291         .module                 = THIS_MODULE,
1292         .name                   = "qlogicpti",
1293         .info                   = qlogicpti_info,
1294         .queuecommand           = qlogicpti_queuecommand,
1295         .slave_configure        = qlogicpti_slave_configure,
1296         .eh_abort_handler       = qlogicpti_abort,
1297         .eh_host_reset_handler  = qlogicpti_reset,
1298         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1299         .this_id                = 7,
1300         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1301 };
1302 
1303 static const struct of_device_id qpti_match[];
1304 static int qpti_sbus_probe(struct platform_device *op)
1305 {
1306         struct device_node *dp = op->dev.of_node;
1307         struct Scsi_Host *host;
1308         struct qlogicpti *qpti;
1309         static int nqptis;
1310         const char *fcode;
1311 
1312         /* Sometimes Antares cards come up not completely
1313          * setup, and we get a report of a zero IRQ.
1314          */
1315         if (op->archdata.irqs[0] == 0)
1316                 return -ENODEV;
1317 
1318         host = scsi_host_alloc(&qpti_template, sizeof(struct qlogicpti));
1319         if (!host)
1320                 return -ENOMEM;
1321 
1322         qpti = shost_priv(host);
1323 
1324         host->max_id = MAX_TARGETS;
1325         qpti->qhost = host;
1326         qpti->op = op;
1327         qpti->qpti_id = nqptis;
1328         qpti->is_pti = !of_node_name_eq(op->dev.of_node, "QLGC,isp");
1329 
1330         if (qpti_map_regs(qpti) < 0)
1331                 goto fail_unlink;
1332 
1333         if (qpti_register_irq(qpti) < 0)
1334                 goto fail_unmap_regs;
1335 
1336         qpti_get_scsi_id(qpti);
1337         qpti_get_bursts(qpti);
1338         qpti_get_clock(qpti);
1339 
1340         /* Clear out scsi_cmnd array. */
1341         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1342 
1343         if (qpti_map_queues(qpti) < 0)
1344                 goto fail_free_irq;
1345 
1346         /* Load the firmware. */
1347         if (qlogicpti_load_firmware(qpti))
1348                 goto fail_unmap_queues;
1349         if (qpti->is_pti) {
1350                 /* Check the PTI status reg. */
1351                 if (qlogicpti_verify_tmon(qpti))
1352                         goto fail_unmap_queues;
1353         }
1354 
1355         /* Reset the ISP and init res/req queues. */
1356         if (qlogicpti_reset_hardware(host))
1357                 goto fail_unmap_queues;
1358 
1359         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1360                qpti->fware_minrev, qpti->fware_micrev);
1361 
1362         fcode = of_get_property(dp, "isp-fcode", NULL);
1363         if (fcode && fcode[0])
1364                 printk("(FCode %s)", fcode);
1365         if (of_find_property(dp, "differential", NULL) != NULL)
1366                 qpti->differential = 1;
1367                         
1368         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1369                 qpti->qpti_id,
1370                 (qpti->ultra ? "Ultra" : "Fast"),
1371                 (qpti->differential ? "differential" : "single ended"));
1372 
1373         if (scsi_add_host(host, &op->dev)) {
1374                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1375                 goto fail_unmap_queues;
1376         }
1377 
1378         dev_set_drvdata(&op->dev, qpti);
1379 
1380         qpti_chain_add(qpti);
1381 
1382         scsi_scan_host(host);
1383         nqptis++;
1384 
1385         return 0;
1386 
1387 fail_unmap_queues:
1388 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1389         dma_free_coherent(&op->dev,
1390                           QSIZE(RES_QUEUE_LEN),
1391                           qpti->res_cpu, qpti->res_dvma);
1392         dma_free_coherent(&op->dev,
1393                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1394                           qpti->req_cpu, qpti->req_dvma);
1395 #undef QSIZE
1396 
1397 fail_free_irq:
1398         free_irq(qpti->irq, qpti);
1399 
1400 fail_unmap_regs:
1401         of_iounmap(&op->resource[0], qpti->qregs,
1402                    resource_size(&op->resource[0]));
1403         if (qpti->is_pti)
1404                 of_iounmap(&op->resource[0], qpti->sreg,
1405                            sizeof(unsigned char));
1406 
1407 fail_unlink:
1408         scsi_host_put(host);
1409 
1410         return -ENODEV;
1411 }
1412 
1413 static int qpti_sbus_remove(struct platform_device *op)
1414 {
1415         struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
1416 
1417         qpti_chain_del(qpti);
1418 
1419         scsi_remove_host(qpti->qhost);
1420 
1421         /* Shut up the card. */
1422         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1423 
1424         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1425         free_irq(qpti->irq, qpti);
1426 
1427 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1428         dma_free_coherent(&op->dev,
1429                           QSIZE(RES_QUEUE_LEN),
1430                           qpti->res_cpu, qpti->res_dvma);
1431         dma_free_coherent(&op->dev,
1432                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1433                           qpti->req_cpu, qpti->req_dvma);
1434 #undef QSIZE
1435 
1436         of_iounmap(&op->resource[0], qpti->qregs,
1437                    resource_size(&op->resource[0]));
1438         if (qpti->is_pti)
1439                 of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
1440 
1441         scsi_host_put(qpti->qhost);
1442 
1443         return 0;
1444 }
1445 
1446 static const struct of_device_id qpti_match[] = {
1447         {
1448                 .name = "ptisp",
1449         },
1450         {
1451                 .name = "PTI,ptisp",
1452         },
1453         {
1454                 .name = "QLGC,isp",
1455         },
1456         {
1457                 .name = "SUNW,isp",
1458         },
1459         {},
1460 };
1461 MODULE_DEVICE_TABLE(of, qpti_match);
1462 
1463 static struct platform_driver qpti_sbus_driver = {
1464         .driver = {
1465                 .name = "qpti",
1466                 .of_match_table = qpti_match,
1467         },
1468         .probe          = qpti_sbus_probe,
1469         .remove         = qpti_sbus_remove,
1470 };
1471 
1472 static int __init qpti_init(void)
1473 {
1474         return platform_driver_register(&qpti_sbus_driver);
1475 }
1476 
1477 static void __exit qpti_exit(void)
1478 {
1479         platform_driver_unregister(&qpti_sbus_driver);
1480 }
1481 
1482 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1483 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1484 MODULE_LICENSE("GPL");
1485 MODULE_VERSION("2.1");
1486 MODULE_FIRMWARE("qlogic/isp1000.bin");
1487 
1488 module_init(qpti_init);
1489 module_exit(qpti_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/qlogicpti.c

DEFINITIONS
