linux/drivers/scsi/hpsa.c
<<
>>
Prefs
   1/*
   2 *    Disk Array driver for HP Smart Array SAS controllers
   3 *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
   4 *
   5 *    This program is free software; you can redistribute it and/or modify
   6 *    it under the terms of the GNU General Public License as published by
   7 *    the Free Software Foundation; version 2 of the License.
   8 *
   9 *    This program is distributed in the hope that it will be useful,
  10 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  12 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  13 *
  14 *    You should have received a copy of the GNU General Public License
  15 *    along with this program; if not, write to the Free Software
  16 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 *
  18 *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  19 *
  20 */
  21
  22#include <linux/module.h>
  23#include <linux/interrupt.h>
  24#include <linux/types.h>
  25#include <linux/pci.h>
  26#include <linux/pci-aspm.h>
  27#include <linux/kernel.h>
  28#include <linux/slab.h>
  29#include <linux/delay.h>
  30#include <linux/fs.h>
  31#include <linux/timer.h>
  32#include <linux/seq_file.h>
  33#include <linux/init.h>
  34#include <linux/spinlock.h>
  35#include <linux/compat.h>
  36#include <linux/blktrace_api.h>
  37#include <linux/uaccess.h>
  38#include <linux/io.h>
  39#include <linux/dma-mapping.h>
  40#include <linux/completion.h>
  41#include <linux/moduleparam.h>
  42#include <scsi/scsi.h>
  43#include <scsi/scsi_cmnd.h>
  44#include <scsi/scsi_device.h>
  45#include <scsi/scsi_host.h>
  46#include <scsi/scsi_tcq.h>
  47#include <linux/cciss_ioctl.h>
  48#include <linux/string.h>
  49#include <linux/bitmap.h>
  50#include <linux/atomic.h>
  51#include <linux/kthread.h>
  52#include <linux/jiffies.h>
  53#include "hpsa_cmd.h"
  54#include "hpsa.h"
  55
  56/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
  57#define HPSA_DRIVER_VERSION "3.4.0-1"
  58#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  59#define HPSA "hpsa"
  60
  61/* How long to wait (in milliseconds) for board to go into simple mode */
  62#define MAX_CONFIG_WAIT 30000
  63#define MAX_IOCTL_CONFIG_WAIT 1000
  64
  65/*define how many times we will try a command because of bus resets */
  66#define MAX_CMD_RETRIES 3
  67
  68/* Embedded module documentation macros - see modules.h */
  69MODULE_AUTHOR("Hewlett-Packard Company");
  70MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  71        HPSA_DRIVER_VERSION);
  72MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  73MODULE_VERSION(HPSA_DRIVER_VERSION);
  74MODULE_LICENSE("GPL");
  75
  76static int hpsa_allow_any;
  77module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  78MODULE_PARM_DESC(hpsa_allow_any,
  79                "Allow hpsa driver to access unknown HP Smart Array hardware");
  80static int hpsa_simple_mode;
  81module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  82MODULE_PARM_DESC(hpsa_simple_mode,
  83        "Use 'simple mode' rather than 'performant mode'");
  84
  85/* define the PCI info for the cards we can control */
  86static const struct pci_device_id hpsa_pci_device_id[] = {
  87        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  88        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  89        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  90        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  91        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  92        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
  93        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
  94        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
  95        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
  96        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
  97        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
  98        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
  99        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x334D},
 100        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
 101        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
 102        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 103        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1920},
 104        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
 105        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
 106        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
 107        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
 108        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1925},
 109        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
 110        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
 111        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
 112        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
 113        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
 114        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
 115        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
 116        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
 117        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
 118        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
 119        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
 120        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
 121        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
 122        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
 123        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
 124        {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 125                PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 126        {0,}
 127};
 128
 129MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 130
 131/*  board_id = Subsystem Device ID & Vendor ID
 132 *  product = Marketing Name for the board
 133 *  access = Address of the struct of function pointers
 134 */
 135static struct board_type products[] = {
 136        {0x3241103C, "Smart Array P212", &SA5_access},
 137        {0x3243103C, "Smart Array P410", &SA5_access},
 138        {0x3245103C, "Smart Array P410i", &SA5_access},
 139        {0x3247103C, "Smart Array P411", &SA5_access},
 140        {0x3249103C, "Smart Array P812", &SA5_access},
 141        {0x324A103C, "Smart Array P712m", &SA5_access},
 142        {0x324B103C, "Smart Array P711m", &SA5_access},
 143        {0x3350103C, "Smart Array P222", &SA5_access},
 144        {0x3351103C, "Smart Array P420", &SA5_access},
 145        {0x3352103C, "Smart Array P421", &SA5_access},
 146        {0x3353103C, "Smart Array P822", &SA5_access},
 147        {0x334D103C, "Smart Array P822se", &SA5_access},
 148        {0x3354103C, "Smart Array P420i", &SA5_access},
 149        {0x3355103C, "Smart Array P220i", &SA5_access},
 150        {0x3356103C, "Smart Array P721m", &SA5_access},
 151        {0x1921103C, "Smart Array P830i", &SA5_access},
 152        {0x1922103C, "Smart Array P430", &SA5_access},
 153        {0x1923103C, "Smart Array P431", &SA5_access},
 154        {0x1924103C, "Smart Array P830", &SA5_access},
 155        {0x1926103C, "Smart Array P731m", &SA5_access},
 156        {0x1928103C, "Smart Array P230i", &SA5_access},
 157        {0x1929103C, "Smart Array P530", &SA5_access},
 158        {0x21BD103C, "Smart Array", &SA5_access},
 159        {0x21BE103C, "Smart Array", &SA5_access},
 160        {0x21BF103C, "Smart Array", &SA5_access},
 161        {0x21C0103C, "Smart Array", &SA5_access},
 162        {0x21C1103C, "Smart Array", &SA5_access},
 163        {0x21C2103C, "Smart Array", &SA5_access},
 164        {0x21C3103C, "Smart Array", &SA5_access},
 165        {0x21C4103C, "Smart Array", &SA5_access},
 166        {0x21C5103C, "Smart Array", &SA5_access},
 167        {0x21C7103C, "Smart Array", &SA5_access},
 168        {0x21C8103C, "Smart Array", &SA5_access},
 169        {0x21C9103C, "Smart Array", &SA5_access},
 170        {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 171};
 172
 173static int number_of_controllers;
 174
 175static struct list_head hpsa_ctlr_list = LIST_HEAD_INIT(hpsa_ctlr_list);
 176static spinlock_t lockup_detector_lock;
 177static struct task_struct *hpsa_lockup_detector;
 178
 179static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 180static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 181static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 182static void start_io(struct ctlr_info *h);
 183
 184#ifdef CONFIG_COMPAT
 185static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 186#endif
 187
 188static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 189static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 190static struct CommandList *cmd_alloc(struct ctlr_info *h);
 191static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 192static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 193        void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 194        int cmd_type);
 195
 196static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 197static void hpsa_scan_start(struct Scsi_Host *);
 198static int hpsa_scan_finished(struct Scsi_Host *sh,
 199        unsigned long elapsed_time);
 200static int hpsa_change_queue_depth(struct scsi_device *sdev,
 201        int qdepth, int reason);
 202
 203static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 204static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
 205static int hpsa_slave_alloc(struct scsi_device *sdev);
 206static void hpsa_slave_destroy(struct scsi_device *sdev);
 207
 208static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 209static int check_for_unit_attention(struct ctlr_info *h,
 210        struct CommandList *c);
 211static void check_ioctl_unit_attention(struct ctlr_info *h,
 212        struct CommandList *c);
 213/* performant mode helper functions */
 214static void calc_bucket_map(int *bucket, int num_buckets,
 215        int nsgs, int *bucket_map);
 216static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 217static inline u32 next_command(struct ctlr_info *h, u8 q);
 218static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
 219                               u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 220                               u64 *cfg_offset);
 221static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 222                                    unsigned long *memory_bar);
 223static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 224static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
 225                                     int wait_for_ready);
 226static inline void finish_cmd(struct CommandList *c);
 227#define BOARD_NOT_READY 0
 228#define BOARD_READY 1
 229
 230static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 231{
 232        unsigned long *priv = shost_priv(sdev->host);
 233        return (struct ctlr_info *) *priv;
 234}
 235
 236static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 237{
 238        unsigned long *priv = shost_priv(sh);
 239        return (struct ctlr_info *) *priv;
 240}
 241
 242static int check_for_unit_attention(struct ctlr_info *h,
 243        struct CommandList *c)
 244{
 245        if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 246                return 0;
 247
 248        switch (c->err_info->SenseInfo[12]) {
 249        case STATE_CHANGED:
 250                dev_warn(&h->pdev->dev, HPSA "%d: a state change "
 251                        "detected, command retried\n", h->ctlr);
 252                break;
 253        case LUN_FAILED:
 254                dev_warn(&h->pdev->dev, HPSA "%d: LUN failure "
 255                        "detected, action required\n", h->ctlr);
 256                break;
 257        case REPORT_LUNS_CHANGED:
 258                dev_warn(&h->pdev->dev, HPSA "%d: report LUN data "
 259                        "changed, action required\n", h->ctlr);
 260        /*
 261         * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
 262         * target (array) devices.
 263         */
 264                break;
 265        case POWER_OR_RESET:
 266                dev_warn(&h->pdev->dev, HPSA "%d: a power on "
 267                        "or device reset detected\n", h->ctlr);
 268                break;
 269        case UNIT_ATTENTION_CLEARED:
 270                dev_warn(&h->pdev->dev, HPSA "%d: unit attention "
 271                    "cleared by another initiator\n", h->ctlr);
 272                break;
 273        default:
 274                dev_warn(&h->pdev->dev, HPSA "%d: unknown "
 275                        "unit attention detected\n", h->ctlr);
 276                break;
 277        }
 278        return 1;
 279}
 280
 281static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 282{
 283        if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
 284                (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
 285                 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
 286                return 0;
 287        dev_warn(&h->pdev->dev, HPSA "device busy");
 288        return 1;
 289}
 290
 291static ssize_t host_store_rescan(struct device *dev,
 292                                 struct device_attribute *attr,
 293                                 const char *buf, size_t count)
 294{
 295        struct ctlr_info *h;
 296        struct Scsi_Host *shost = class_to_shost(dev);
 297        h = shost_to_hba(shost);
 298        hpsa_scan_start(h->scsi_host);
 299        return count;
 300}
 301
 302static ssize_t host_show_firmware_revision(struct device *dev,
 303             struct device_attribute *attr, char *buf)
 304{
 305        struct ctlr_info *h;
 306        struct Scsi_Host *shost = class_to_shost(dev);
 307        unsigned char *fwrev;
 308
 309        h = shost_to_hba(shost);
 310        if (!h->hba_inquiry_data)
 311                return 0;
 312        fwrev = &h->hba_inquiry_data[32];
 313        return snprintf(buf, 20, "%c%c%c%c\n",
 314                fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 315}
 316
 317static ssize_t host_show_commands_outstanding(struct device *dev,
 318             struct device_attribute *attr, char *buf)
 319{
 320        struct Scsi_Host *shost = class_to_shost(dev);
 321        struct ctlr_info *h = shost_to_hba(shost);
 322
 323        return snprintf(buf, 20, "%d\n", h->commands_outstanding);
 324}
 325
 326static ssize_t host_show_transport_mode(struct device *dev,
 327        struct device_attribute *attr, char *buf)
 328{
 329        struct ctlr_info *h;
 330        struct Scsi_Host *shost = class_to_shost(dev);
 331
 332        h = shost_to_hba(shost);
 333        return snprintf(buf, 20, "%s\n",
 334                h->transMethod & CFGTBL_Trans_Performant ?
 335                        "performant" : "simple");
 336}
 337
 338/* List of controllers which cannot be hard reset on kexec with reset_devices */
 339static u32 unresettable_controller[] = {
 340        0x324a103C, /* Smart Array P712m */
 341        0x324b103C, /* SmartArray P711m */
 342        0x3223103C, /* Smart Array P800 */
 343        0x3234103C, /* Smart Array P400 */
 344        0x3235103C, /* Smart Array P400i */
 345        0x3211103C, /* Smart Array E200i */
 346        0x3212103C, /* Smart Array E200 */
 347        0x3213103C, /* Smart Array E200i */
 348        0x3214103C, /* Smart Array E200i */
 349        0x3215103C, /* Smart Array E200i */
 350        0x3237103C, /* Smart Array E500 */
 351        0x323D103C, /* Smart Array P700m */
 352        0x40800E11, /* Smart Array 5i */
 353        0x409C0E11, /* Smart Array 6400 */
 354        0x409D0E11, /* Smart Array 6400 EM */
 355        0x40700E11, /* Smart Array 5300 */
 356        0x40820E11, /* Smart Array 532 */
 357        0x40830E11, /* Smart Array 5312 */
 358        0x409A0E11, /* Smart Array 641 */
 359        0x409B0E11, /* Smart Array 642 */
 360        0x40910E11, /* Smart Array 6i */
 361};
 362
 363/* List of controllers which cannot even be soft reset */
 364static u32 soft_unresettable_controller[] = {
 365        0x40800E11, /* Smart Array 5i */
 366        0x40700E11, /* Smart Array 5300 */
 367        0x40820E11, /* Smart Array 532 */
 368        0x40830E11, /* Smart Array 5312 */
 369        0x409A0E11, /* Smart Array 641 */
 370        0x409B0E11, /* Smart Array 642 */
 371        0x40910E11, /* Smart Array 6i */
 372        /* Exclude 640x boards.  These are two pci devices in one slot
 373         * which share a battery backed cache module.  One controls the
 374         * cache, the other accesses the cache through the one that controls
 375         * it.  If we reset the one controlling the cache, the other will
 376         * likely not be happy.  Just forbid resetting this conjoined mess.
 377         * The 640x isn't really supported by hpsa anyway.
 378         */
 379        0x409C0E11, /* Smart Array 6400 */
 380        0x409D0E11, /* Smart Array 6400 EM */
 381};
 382
 383static int ctlr_is_hard_resettable(u32 board_id)
 384{
 385        int i;
 386
 387        for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
 388                if (unresettable_controller[i] == board_id)
 389                        return 0;
 390        return 1;
 391}
 392
 393static int ctlr_is_soft_resettable(u32 board_id)
 394{
 395        int i;
 396
 397        for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
 398                if (soft_unresettable_controller[i] == board_id)
 399                        return 0;
 400        return 1;
 401}
 402
 403static int ctlr_is_resettable(u32 board_id)
 404{
 405        return ctlr_is_hard_resettable(board_id) ||
 406                ctlr_is_soft_resettable(board_id);
 407}
 408
 409static ssize_t host_show_resettable(struct device *dev,
 410        struct device_attribute *attr, char *buf)
 411{
 412        struct ctlr_info *h;
 413        struct Scsi_Host *shost = class_to_shost(dev);
 414
 415        h = shost_to_hba(shost);
 416        return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 417}
 418
 419static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 420{
 421        return (scsi3addr[3] & 0xC0) == 0x40;
 422}
 423
 424static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 425        "1(ADM)", "UNKNOWN"
 426};
 427#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 428
 429static ssize_t raid_level_show(struct device *dev,
 430             struct device_attribute *attr, char *buf)
 431{
 432        ssize_t l = 0;
 433        unsigned char rlevel;
 434        struct ctlr_info *h;
 435        struct scsi_device *sdev;
 436        struct hpsa_scsi_dev_t *hdev;
 437        unsigned long flags;
 438
 439        sdev = to_scsi_device(dev);
 440        h = sdev_to_hba(sdev);
 441        spin_lock_irqsave(&h->lock, flags);
 442        hdev = sdev->hostdata;
 443        if (!hdev) {
 444                spin_unlock_irqrestore(&h->lock, flags);
 445                return -ENODEV;
 446        }
 447
 448        /* Is this even a logical drive? */
 449        if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 450                spin_unlock_irqrestore(&h->lock, flags);
 451                l = snprintf(buf, PAGE_SIZE, "N/A\n");
 452                return l;
 453        }
 454
 455        rlevel = hdev->raid_level;
 456        spin_unlock_irqrestore(&h->lock, flags);
 457        if (rlevel > RAID_UNKNOWN)
 458                rlevel = RAID_UNKNOWN;
 459        l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 460        return l;
 461}
 462
 463static ssize_t lunid_show(struct device *dev,
 464             struct device_attribute *attr, char *buf)
 465{
 466        struct ctlr_info *h;
 467        struct scsi_device *sdev;
 468        struct hpsa_scsi_dev_t *hdev;
 469        unsigned long flags;
 470        unsigned char lunid[8];
 471
 472        sdev = to_scsi_device(dev);
 473        h = sdev_to_hba(sdev);
 474        spin_lock_irqsave(&h->lock, flags);
 475        hdev = sdev->hostdata;
 476        if (!hdev) {
 477                spin_unlock_irqrestore(&h->lock, flags);
 478                return -ENODEV;
 479        }
 480        memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 481        spin_unlock_irqrestore(&h->lock, flags);
 482        return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 483                lunid[0], lunid[1], lunid[2], lunid[3],
 484                lunid[4], lunid[5], lunid[6], lunid[7]);
 485}
 486
 487static ssize_t unique_id_show(struct device *dev,
 488             struct device_attribute *attr, char *buf)
 489{
 490        struct ctlr_info *h;
 491        struct scsi_device *sdev;
 492        struct hpsa_scsi_dev_t *hdev;
 493        unsigned long flags;
 494        unsigned char sn[16];
 495
 496        sdev = to_scsi_device(dev);
 497        h = sdev_to_hba(sdev);
 498        spin_lock_irqsave(&h->lock, flags);
 499        hdev = sdev->hostdata;
 500        if (!hdev) {
 501                spin_unlock_irqrestore(&h->lock, flags);
 502                return -ENODEV;
 503        }
 504        memcpy(sn, hdev->device_id, sizeof(sn));
 505        spin_unlock_irqrestore(&h->lock, flags);
 506        return snprintf(buf, 16 * 2 + 2,
 507                        "%02X%02X%02X%02X%02X%02X%02X%02X"
 508                        "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 509                        sn[0], sn[1], sn[2], sn[3],
 510                        sn[4], sn[5], sn[6], sn[7],
 511                        sn[8], sn[9], sn[10], sn[11],
 512                        sn[12], sn[13], sn[14], sn[15]);
 513}
 514
 515static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 516static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 517static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 518static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 519static DEVICE_ATTR(firmware_revision, S_IRUGO,
 520        host_show_firmware_revision, NULL);
 521static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 522        host_show_commands_outstanding, NULL);
 523static DEVICE_ATTR(transport_mode, S_IRUGO,
 524        host_show_transport_mode, NULL);
 525static DEVICE_ATTR(resettable, S_IRUGO,
 526        host_show_resettable, NULL);
 527
 528static struct device_attribute *hpsa_sdev_attrs[] = {
 529        &dev_attr_raid_level,
 530        &dev_attr_lunid,
 531        &dev_attr_unique_id,
 532        NULL,
 533};
 534
 535static struct device_attribute *hpsa_shost_attrs[] = {
 536        &dev_attr_rescan,
 537        &dev_attr_firmware_revision,
 538        &dev_attr_commands_outstanding,
 539        &dev_attr_transport_mode,
 540        &dev_attr_resettable,
 541        NULL,
 542};
 543
 544static struct scsi_host_template hpsa_driver_template = {
 545        .module                 = THIS_MODULE,
 546        .name                   = HPSA,
 547        .proc_name              = HPSA,
 548        .queuecommand           = hpsa_scsi_queue_command,
 549        .scan_start             = hpsa_scan_start,
 550        .scan_finished          = hpsa_scan_finished,
 551        .change_queue_depth     = hpsa_change_queue_depth,
 552        .this_id                = -1,
 553        .use_clustering         = ENABLE_CLUSTERING,
 554        .eh_abort_handler       = hpsa_eh_abort_handler,
 555        .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 556        .ioctl                  = hpsa_ioctl,
 557        .slave_alloc            = hpsa_slave_alloc,
 558        .slave_destroy          = hpsa_slave_destroy,
 559#ifdef CONFIG_COMPAT
 560        .compat_ioctl           = hpsa_compat_ioctl,
 561#endif
 562        .sdev_attrs = hpsa_sdev_attrs,
 563        .shost_attrs = hpsa_shost_attrs,
 564        .max_sectors = 8192,
 565};
 566
 567
 568/* Enqueuing and dequeuing functions for cmdlists. */
 569static inline void addQ(struct list_head *list, struct CommandList *c)
 570{
 571        list_add_tail(&c->list, list);
 572}
 573
 574static inline u32 next_command(struct ctlr_info *h, u8 q)
 575{
 576        u32 a;
 577        struct reply_pool *rq = &h->reply_queue[q];
 578        unsigned long flags;
 579
 580        if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 581                return h->access.command_completed(h, q);
 582
 583        if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
 584                a = rq->head[rq->current_entry];
 585                rq->current_entry++;
 586                spin_lock_irqsave(&h->lock, flags);
 587                h->commands_outstanding--;
 588                spin_unlock_irqrestore(&h->lock, flags);
 589        } else {
 590                a = FIFO_EMPTY;
 591        }
 592        /* Check for wraparound */
 593        if (rq->current_entry == h->max_commands) {
 594                rq->current_entry = 0;
 595                rq->wraparound ^= 1;
 596        }
 597        return a;
 598}
 599
 600/* set_performant_mode: Modify the tag for cciss performant
 601 * set bit 0 for pull model, bits 3-1 for block fetch
 602 * register number
 603 */
 604static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 605{
 606        if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
 607                c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 608                if (likely(h->msix_vector))
 609                        c->Header.ReplyQueue =
 610                                raw_smp_processor_id() % h->nreply_queues;
 611        }
 612}
 613
 614static int is_firmware_flash_cmd(u8 *cdb)
 615{
 616        return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
 617}
 618
 619/*
 620 * During firmware flash, the heartbeat register may not update as frequently
 621 * as it should.  So we dial down lockup detection during firmware flash. and
 622 * dial it back up when firmware flash completes.
 623 */
 624#define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
 625#define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
 626static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
 627                struct CommandList *c)
 628{
 629        if (!is_firmware_flash_cmd(c->Request.CDB))
 630                return;
 631        atomic_inc(&h->firmware_flash_in_progress);
 632        h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
 633}
 634
 635static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
 636                struct CommandList *c)
 637{
 638        if (is_firmware_flash_cmd(c->Request.CDB) &&
 639                atomic_dec_and_test(&h->firmware_flash_in_progress))
 640                h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
 641}
 642
 643static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 644        struct CommandList *c)
 645{
 646        unsigned long flags;
 647
 648        set_performant_mode(h, c);
 649        dial_down_lockup_detection_during_fw_flash(h, c);
 650        spin_lock_irqsave(&h->lock, flags);
 651        addQ(&h->reqQ, c);
 652        h->Qdepth++;
 653        spin_unlock_irqrestore(&h->lock, flags);
 654        start_io(h);
 655}
 656
 657static inline void removeQ(struct CommandList *c)
 658{
 659        if (WARN_ON(list_empty(&c->list)))
 660                return;
 661        list_del_init(&c->list);
 662}
 663
 664static inline int is_hba_lunid(unsigned char scsi3addr[])
 665{
 666        return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 667}
 668
 669static inline int is_scsi_rev_5(struct ctlr_info *h)
 670{
 671        if (!h->hba_inquiry_data)
 672                return 0;
 673        if ((h->hba_inquiry_data[2] & 0x07) == 5)
 674                return 1;
 675        return 0;
 676}
 677
 678static int hpsa_find_target_lun(struct ctlr_info *h,
 679        unsigned char scsi3addr[], int bus, int *target, int *lun)
 680{
 681        /* finds an unused bus, target, lun for a new physical device
 682         * assumes h->devlock is held
 683         */
 684        int i, found = 0;
 685        DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
 686
 687        bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
 688
 689        for (i = 0; i < h->ndevices; i++) {
 690                if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 691                        __set_bit(h->dev[i]->target, lun_taken);
 692        }
 693
 694        i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
 695        if (i < HPSA_MAX_DEVICES) {
 696                /* *bus = 1; */
 697                *target = i;
 698                *lun = 0;
 699                found = 1;
 700        }
 701        return !found;
 702}
 703
 704/* Add an entry into h->dev[] array. */
 705static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 706                struct hpsa_scsi_dev_t *device,
 707                struct hpsa_scsi_dev_t *added[], int *nadded)
 708{
 709        /* assumes h->devlock is held */
 710        int n = h->ndevices;
 711        int i;
 712        unsigned char addr1[8], addr2[8];
 713        struct hpsa_scsi_dev_t *sd;
 714
 715        if (n >= HPSA_MAX_DEVICES) {
 716                dev_err(&h->pdev->dev, "too many devices, some will be "
 717                        "inaccessible.\n");
 718                return -1;
 719        }
 720
 721        /* physical devices do not have lun or target assigned until now. */
 722        if (device->lun != -1)
 723                /* Logical device, lun is already assigned. */
 724                goto lun_assigned;
 725
 726        /* If this device a non-zero lun of a multi-lun device
 727         * byte 4 of the 8-byte LUN addr will contain the logical
 728         * unit no, zero otherise.
 729         */
 730        if (device->scsi3addr[4] == 0) {
 731                /* This is not a non-zero lun of a multi-lun device */
 732                if (hpsa_find_target_lun(h, device->scsi3addr,
 733                        device->bus, &device->target, &device->lun) != 0)
 734                        return -1;
 735                goto lun_assigned;
 736        }
 737
 738        /* This is a non-zero lun of a multi-lun device.
 739         * Search through our list and find the device which
 740         * has the same 8 byte LUN address, excepting byte 4.
 741         * Assign the same bus and target for this new LUN.
 742         * Use the logical unit number from the firmware.
 743         */
 744        memcpy(addr1, device->scsi3addr, 8);
 745        addr1[4] = 0;
 746        for (i = 0; i < n; i++) {
 747                sd = h->dev[i];
 748                memcpy(addr2, sd->scsi3addr, 8);
 749                addr2[4] = 0;
 750                /* differ only in byte 4? */
 751                if (memcmp(addr1, addr2, 8) == 0) {
 752                        device->bus = sd->bus;
 753                        device->target = sd->target;
 754                        device->lun = device->scsi3addr[4];
 755                        break;
 756                }
 757        }
 758        if (device->lun == -1) {
 759                dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 760                        " suspect firmware bug or unsupported hardware "
 761                        "configuration.\n");
 762                        return -1;
 763        }
 764
 765lun_assigned:
 766
 767        h->dev[n] = device;
 768        h->ndevices++;
 769        added[*nadded] = device;
 770        (*nadded)++;
 771
 772        /* initially, (before registering with scsi layer) we don't
 773         * know our hostno and we don't want to print anything first
 774         * time anyway (the scsi layer's inquiries will show that info)
 775         */
 776        /* if (hostno != -1) */
 777                dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 778                        scsi_device_type(device->devtype), hostno,
 779                        device->bus, device->target, device->lun);
 780        return 0;
 781}
 782
 783/* Update an entry in h->dev[] array. */
 784static void hpsa_scsi_update_entry(struct ctlr_info *h, int hostno,
 785        int entry, struct hpsa_scsi_dev_t *new_entry)
 786{
 787        /* assumes h->devlock is held */
 788        BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
 789
 790        /* Raid level changed. */
 791        h->dev[entry]->raid_level = new_entry->raid_level;
 792        dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d updated.\n",
 793                scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 794                new_entry->target, new_entry->lun);
 795}
 796
 797/* Replace an entry from h->dev[] array. */
 798static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 799        int entry, struct hpsa_scsi_dev_t *new_entry,
 800        struct hpsa_scsi_dev_t *added[], int *nadded,
 801        struct hpsa_scsi_dev_t *removed[], int *nremoved)
 802{
 803        /* assumes h->devlock is held */
 804        BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
 805        removed[*nremoved] = h->dev[entry];
 806        (*nremoved)++;
 807
 808        /*
 809         * New physical devices won't have target/lun assigned yet
 810         * so we need to preserve the values in the slot we are replacing.
 811         */
 812        if (new_entry->target == -1) {
 813                new_entry->target = h->dev[entry]->target;
 814                new_entry->lun = h->dev[entry]->lun;
 815        }
 816
 817        h->dev[entry] = new_entry;
 818        added[*nadded] = new_entry;
 819        (*nadded)++;
 820        dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 821                scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 822                        new_entry->target, new_entry->lun);
 823}
 824
 825/* Remove an entry from h->dev[] array. */
 826static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 827        struct hpsa_scsi_dev_t *removed[], int *nremoved)
 828{
 829        /* assumes h->devlock is held */
 830        int i;
 831        struct hpsa_scsi_dev_t *sd;
 832
 833        BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
 834
 835        sd = h->dev[entry];
 836        removed[*nremoved] = h->dev[entry];
 837        (*nremoved)++;
 838
 839        for (i = entry; i < h->ndevices-1; i++)
 840                h->dev[i] = h->dev[i+1];
 841        h->ndevices--;
 842        dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 843                scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 844                sd->lun);
 845}
 846
 847#define SCSI3ADDR_EQ(a, b) ( \
 848        (a)[7] == (b)[7] && \
 849        (a)[6] == (b)[6] && \
 850        (a)[5] == (b)[5] && \
 851        (a)[4] == (b)[4] && \
 852        (a)[3] == (b)[3] && \
 853        (a)[2] == (b)[2] && \
 854        (a)[1] == (b)[1] && \
 855        (a)[0] == (b)[0])
 856
 857static void fixup_botched_add(struct ctlr_info *h,
 858        struct hpsa_scsi_dev_t *added)
 859{
 860        /* called when scsi_add_device fails in order to re-adjust
 861         * h->dev[] to match the mid layer's view.
 862         */
 863        unsigned long flags;
 864        int i, j;
 865
 866        spin_lock_irqsave(&h->lock, flags);
 867        for (i = 0; i < h->ndevices; i++) {
 868                if (h->dev[i] == added) {
 869                        for (j = i; j < h->ndevices-1; j++)
 870                                h->dev[j] = h->dev[j+1];
 871                        h->ndevices--;
 872                        break;
 873                }
 874        }
 875        spin_unlock_irqrestore(&h->lock, flags);
 876        kfree(added);
 877}
 878
 879static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 880        struct hpsa_scsi_dev_t *dev2)
 881{
 882        /* we compare everything except lun and target as these
 883         * are not yet assigned.  Compare parts likely
 884         * to differ first
 885         */
 886        if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 887                sizeof(dev1->scsi3addr)) != 0)
 888                return 0;
 889        if (memcmp(dev1->device_id, dev2->device_id,
 890                sizeof(dev1->device_id)) != 0)
 891                return 0;
 892        if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 893                return 0;
 894        if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 895                return 0;
 896        if (dev1->devtype != dev2->devtype)
 897                return 0;
 898        if (dev1->bus != dev2->bus)
 899                return 0;
 900        return 1;
 901}
 902
 903static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
 904        struct hpsa_scsi_dev_t *dev2)
 905{
 906        /* Device attributes that can change, but don't mean
 907         * that the device is a different device, nor that the OS
 908         * needs to be told anything about the change.
 909         */
 910        if (dev1->raid_level != dev2->raid_level)
 911                return 1;
 912        return 0;
 913}
 914
 915/* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 916 * and return needle location in *index.  If scsi3addr matches, but not
 917 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 918 * location in *index.
 919 * In the case of a minor device attribute change, such as RAID level, just
 920 * return DEVICE_UPDATED, along with the updated device's location in index.
 921 * If needle not found, return DEVICE_NOT_FOUND.
 922 */
 923static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 924        struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 925        int *index)
 926{
 927        int i;
 928#define DEVICE_NOT_FOUND 0
 929#define DEVICE_CHANGED 1
 930#define DEVICE_SAME 2
 931#define DEVICE_UPDATED 3
 932        for (i = 0; i < haystack_size; i++) {
 933                if (haystack[i] == NULL) /* previously removed. */
 934                        continue;
 935                if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 936                        *index = i;
 937                        if (device_is_the_same(needle, haystack[i])) {
 938                                if (device_updated(needle, haystack[i]))
 939                                        return DEVICE_UPDATED;
 940                                return DEVICE_SAME;
 941                        } else {
 942                                return DEVICE_CHANGED;
 943                        }
 944                }
 945        }
 946        *index = -1;
 947        return DEVICE_NOT_FOUND;
 948}
 949
 950static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 951        struct hpsa_scsi_dev_t *sd[], int nsds)
 952{
 953        /* sd contains scsi3 addresses and devtypes, and inquiry
 954         * data.  This function takes what's in sd to be the current
 955         * reality and updates h->dev[] to reflect that reality.
 956         */
 957        int i, entry, device_change, changes = 0;
 958        struct hpsa_scsi_dev_t *csd;
 959        unsigned long flags;
 960        struct hpsa_scsi_dev_t **added, **removed;
 961        int nadded, nremoved;
 962        struct Scsi_Host *sh = NULL;
 963
 964        added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
 965        removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
 966
 967        if (!added || !removed) {
 968                dev_warn(&h->pdev->dev, "out of memory in "
 969                        "adjust_hpsa_scsi_table\n");
 970                goto free_and_out;
 971        }
 972
 973        spin_lock_irqsave(&h->devlock, flags);
 974
 975        /* find any devices in h->dev[] that are not in
 976         * sd[] and remove them from h->dev[], and for any
 977         * devices which have changed, remove the old device
 978         * info and add the new device info.
 979         * If minor device attributes change, just update
 980         * the existing device structure.
 981         */
 982        i = 0;
 983        nremoved = 0;
 984        nadded = 0;
 985        while (i < h->ndevices) {
 986                csd = h->dev[i];
 987                device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 988                if (device_change == DEVICE_NOT_FOUND) {
 989                        changes++;
 990                        hpsa_scsi_remove_entry(h, hostno, i,
 991                                removed, &nremoved);
 992                        continue; /* remove ^^^, hence i not incremented */
 993                } else if (device_change == DEVICE_CHANGED) {
 994                        changes++;
 995                        hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 996                                added, &nadded, removed, &nremoved);
 997                        /* Set it to NULL to prevent it from being freed
 998                         * at the bottom of hpsa_update_scsi_devices()
 999                         */
1000                        sd[entry] = NULL;
1001                } else if (device_change == DEVICE_UPDATED) {
1002                        hpsa_scsi_update_entry(h, hostno, i, sd[entry]);
1003                }
1004                i++;
1005        }
1006
1007        /* Now, make sure every device listed in sd[] is also
1008         * listed in h->dev[], adding them if they aren't found
1009         */
1010
1011        for (i = 0; i < nsds; i++) {
1012                if (!sd[i]) /* if already added above. */
1013                        continue;
1014                device_change = hpsa_scsi_find_entry(sd[i], h->dev,
1015                                        h->ndevices, &entry);
1016                if (device_change == DEVICE_NOT_FOUND) {
1017                        changes++;
1018                        if (hpsa_scsi_add_entry(h, hostno, sd[i],
1019                                added, &nadded) != 0)
1020                                break;
1021                        sd[i] = NULL; /* prevent from being freed later. */
1022                } else if (device_change == DEVICE_CHANGED) {
1023                        /* should never happen... */
1024                        changes++;
1025                        dev_warn(&h->pdev->dev,
1026                                "device unexpectedly changed.\n");
1027                        /* but if it does happen, we just ignore that device */
1028                }
1029        }
1030        spin_unlock_irqrestore(&h->devlock, flags);
1031
1032        /* Don't notify scsi mid layer of any changes the first time through
1033         * (or if there are no changes) scsi_scan_host will do it later the
1034         * first time through.
1035         */
1036        if (hostno == -1 || !changes)
1037                goto free_and_out;
1038
1039        sh = h->scsi_host;
1040        /* Notify scsi mid layer of any removed devices */
1041        for (i = 0; i < nremoved; i++) {
1042                struct scsi_device *sdev =
1043                        scsi_device_lookup(sh, removed[i]->bus,
1044                                removed[i]->target, removed[i]->lun);
1045                if (sdev != NULL) {
1046                        scsi_remove_device(sdev);
1047                        scsi_device_put(sdev);
1048                } else {
1049                        /* We don't expect to get here.
1050                         * future cmds to this device will get selection
1051                         * timeout as if the device was gone.
1052                         */
1053                        dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
1054                                " for removal.", hostno, removed[i]->bus,
1055                                removed[i]->target, removed[i]->lun);
1056                }
1057                kfree(removed[i]);
1058                removed[i] = NULL;
1059        }
1060
1061        /* Notify scsi mid layer of any added devices */
1062        for (i = 0; i < nadded; i++) {
1063                if (scsi_add_device(sh, added[i]->bus,
1064                        added[i]->target, added[i]->lun) == 0)
1065                        continue;
1066                dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
1067                        "device not added.\n", hostno, added[i]->bus,
1068                        added[i]->target, added[i]->lun);
1069                /* now we have to remove it from h->dev,
1070                 * since it didn't get added to scsi mid layer
1071                 */
1072                fixup_botched_add(h, added[i]);
1073        }
1074
1075free_and_out:
1076        kfree(added);
1077        kfree(removed);
1078}
1079
1080/*
1081 * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
1082 * Assume's h->devlock is held.
1083 */
1084static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
1085        int bus, int target, int lun)
1086{
1087        int i;
1088        struct hpsa_scsi_dev_t *sd;
1089
1090        for (i = 0; i < h->ndevices; i++) {
1091                sd = h->dev[i];
1092                if (sd->bus == bus && sd->target == target && sd->lun == lun)
1093                        return sd;
1094        }
1095        return NULL;
1096}
1097
1098/* link sdev->hostdata to our per-device structure. */
1099static int hpsa_slave_alloc(struct scsi_device *sdev)
1100{
1101        struct hpsa_scsi_dev_t *sd;
1102        unsigned long flags;
1103        struct ctlr_info *h;
1104
1105        h = sdev_to_hba(sdev);
1106        spin_lock_irqsave(&h->devlock, flags);
1107        sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
1108                sdev_id(sdev), sdev->lun);
1109        if (sd != NULL)
1110                sdev->hostdata = sd;
1111        spin_unlock_irqrestore(&h->devlock, flags);
1112        return 0;
1113}
1114
1115static void hpsa_slave_destroy(struct scsi_device *sdev)
1116{
1117        /* nothing to do. */
1118}
1119
1120static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
1121{
1122        int i;
1123
1124        if (!h->cmd_sg_list)
1125                return;
1126        for (i = 0; i < h->nr_cmds; i++) {
1127                kfree(h->cmd_sg_list[i]);
1128                h->cmd_sg_list[i] = NULL;
1129        }
1130        kfree(h->cmd_sg_list);
1131        h->cmd_sg_list = NULL;
1132}
1133
1134static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
1135{
1136        int i;
1137
1138        if (h->chainsize <= 0)
1139                return 0;
1140
1141        h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
1142                                GFP_KERNEL);
1143        if (!h->cmd_sg_list)
1144                return -ENOMEM;
1145        for (i = 0; i < h->nr_cmds; i++) {
1146                h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
1147                                                h->chainsize, GFP_KERNEL);
1148                if (!h->cmd_sg_list[i])
1149                        goto clean;
1150        }
1151        return 0;
1152
1153clean:
1154        hpsa_free_sg_chain_blocks(h);
1155        return -ENOMEM;
1156}
1157
1158static int hpsa_map_sg_chain_block(struct ctlr_info *h,
1159        struct CommandList *c)
1160{
1161        struct SGDescriptor *chain_sg, *chain_block;
1162        u64 temp64;
1163
1164        chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1165        chain_block = h->cmd_sg_list[c->cmdindex];
1166        chain_sg->Ext = HPSA_SG_CHAIN;
1167        chain_sg->Len = sizeof(*chain_sg) *
1168                (c->Header.SGTotal - h->max_cmd_sg_entries);
1169        temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
1170                                PCI_DMA_TODEVICE);
1171        if (dma_mapping_error(&h->pdev->dev, temp64)) {
1172                /* prevent subsequent unmapping */
1173                chain_sg->Addr.lower = 0;
1174                chain_sg->Addr.upper = 0;
1175                return -1;
1176        }
1177        chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
1178        chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1179        return 0;
1180}
1181
1182static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
1183        struct CommandList *c)
1184{
1185        struct SGDescriptor *chain_sg;
1186        union u64bit temp64;
1187
1188        if (c->Header.SGTotal <= h->max_cmd_sg_entries)
1189                return;
1190
1191        chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1192        temp64.val32.lower = chain_sg->Addr.lower;
1193        temp64.val32.upper = chain_sg->Addr.upper;
1194        pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
1195}
1196
1197static void complete_scsi_command(struct CommandList *cp)
1198{
1199        struct scsi_cmnd *cmd;
1200        struct ctlr_info *h;
1201        struct ErrorInfo *ei;
1202
1203        unsigned char sense_key;
1204        unsigned char asc;      /* additional sense code */
1205        unsigned char ascq;     /* additional sense code qualifier */
1206        unsigned long sense_data_size;
1207
1208        ei = cp->err_info;
1209        cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1210        h = cp->h;
1211
1212        scsi_dma_unmap(cmd); /* undo the DMA mappings */
1213        if (cp->Header.SGTotal > h->max_cmd_sg_entries)
1214                hpsa_unmap_sg_chain_block(h, cp);
1215
1216        cmd->result = (DID_OK << 16);           /* host byte */
1217        cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1218        cmd->result |= ei->ScsiStatus;
1219
1220        /* copy the sense data whether we need to or not. */
1221        if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
1222                sense_data_size = SCSI_SENSE_BUFFERSIZE;
1223        else
1224                sense_data_size = sizeof(ei->SenseInfo);
1225        if (ei->SenseLen < sense_data_size)
1226                sense_data_size = ei->SenseLen;
1227
1228        memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
1229        scsi_set_resid(cmd, ei->ResidualCnt);
1230
1231        if (ei->CommandStatus == 0) {
1232                cmd_free(h, cp);
1233                cmd->scsi_done(cmd);
1234                return;
1235        }
1236
1237        /* an error has occurred */
1238        switch (ei->CommandStatus) {
1239
1240        case CMD_TARGET_STATUS:
1241                if (ei->ScsiStatus) {
1242                        /* Get sense key */
1243                        sense_key = 0xf & ei->SenseInfo[2];
1244                        /* Get additional sense code */
1245                        asc = ei->SenseInfo[12];
1246                        /* Get addition sense code qualifier */
1247                        ascq = ei->SenseInfo[13];
1248                }
1249
1250                if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1251                        if (check_for_unit_attention(h, cp)) {
1252                                cmd->result = DID_SOFT_ERROR << 16;
1253                                break;
1254                        }
1255                        if (sense_key == ILLEGAL_REQUEST) {
1256                                /*
1257                                 * SCSI REPORT_LUNS is commonly unsupported on
1258                                 * Smart Array.  Suppress noisy complaint.
1259                                 */
1260                                if (cp->Request.CDB[0] == REPORT_LUNS)
1261                                        break;
1262
1263                                /* If ASC/ASCQ indicate Logical Unit
1264                                 * Not Supported condition,
1265                                 */
1266                                if ((asc == 0x25) && (ascq == 0x0)) {
1267                                        dev_warn(&h->pdev->dev, "cp %p "
1268                                                "has check condition\n", cp);
1269                                        break;
1270                                }
1271                        }
1272
1273                        if (sense_key == NOT_READY) {
1274                                /* If Sense is Not Ready, Logical Unit
1275                                 * Not ready, Manual Intervention
1276                                 * required
1277                                 */
1278                                if ((asc == 0x04) && (ascq == 0x03)) {
1279                                        dev_warn(&h->pdev->dev, "cp %p "
1280                                                "has check condition: unit "
1281                                                "not ready, manual "
1282                                                "intervention required\n", cp);
1283                                        break;
1284                                }
1285                        }
1286                        if (sense_key == ABORTED_COMMAND) {
1287                                /* Aborted command is retryable */
1288                                dev_warn(&h->pdev->dev, "cp %p "
1289                                        "has check condition: aborted command: "
1290                                        "ASC: 0x%x, ASCQ: 0x%x\n",
1291                                        cp, asc, ascq);
1292                                cmd->result = DID_SOFT_ERROR << 16;
1293                                break;
1294                        }
1295                        /* Must be some other type of check condition */
1296                        dev_dbg(&h->pdev->dev, "cp %p has check condition: "
1297                                        "unknown type: "
1298                                        "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1299                                        "Returning result: 0x%x, "
1300                                        "cmd=[%02x %02x %02x %02x %02x "
1301                                        "%02x %02x %02x %02x %02x %02x "
1302                                        "%02x %02x %02x %02x %02x]\n",
1303                                        cp, sense_key, asc, ascq,
1304                                        cmd->result,
1305                                        cmd->cmnd[0], cmd->cmnd[1],
1306                                        cmd->cmnd[2], cmd->cmnd[3],
1307                                        cmd->cmnd[4], cmd->cmnd[5],
1308                                        cmd->cmnd[6], cmd->cmnd[7],
1309                                        cmd->cmnd[8], cmd->cmnd[9],
1310                                        cmd->cmnd[10], cmd->cmnd[11],
1311                                        cmd->cmnd[12], cmd->cmnd[13],
1312                                        cmd->cmnd[14], cmd->cmnd[15]);
1313                        break;
1314                }
1315
1316
1317                /* Problem was not a check condition
1318                 * Pass it up to the upper layers...
1319                 */
1320                if (ei->ScsiStatus) {
1321                        dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1322                                "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1323                                "Returning result: 0x%x\n",
1324                                cp, ei->ScsiStatus,
1325                                sense_key, asc, ascq,
1326                                cmd->result);
1327                } else {  /* scsi status is zero??? How??? */
1328                        dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1329                                "Returning no connection.\n", cp),
1330
1331                        /* Ordinarily, this case should never happen,
1332                         * but there is a bug in some released firmware
1333                         * revisions that allows it to happen if, for
1334                         * example, a 4100 backplane loses power and
1335                         * the tape drive is in it.  We assume that
1336                         * it's a fatal error of some kind because we
1337                         * can't show that it wasn't. We will make it
1338                         * look like selection timeout since that is
1339                         * the most common reason for this to occur,
1340                         * and it's severe enough.
1341                         */
1342
1343                        cmd->result = DID_NO_CONNECT << 16;
1344                }
1345                break;
1346
1347        case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1348                break;
1349        case CMD_DATA_OVERRUN:
1350                dev_warn(&h->pdev->dev, "cp %p has"
1351                        " completed with data overrun "
1352                        "reported\n", cp);
1353                break;
1354        case CMD_INVALID: {
1355                /* print_bytes(cp, sizeof(*cp), 1, 0);
1356                print_cmd(cp); */
1357                /* We get CMD_INVALID if you address a non-existent device
1358                 * instead of a selection timeout (no response).  You will
1359                 * see this if you yank out a drive, then try to access it.
1360                 * This is kind of a shame because it means that any other
1361                 * CMD_INVALID (e.g. driver bug) will get interpreted as a
1362                 * missing target. */
1363                cmd->result = DID_NO_CONNECT << 16;
1364        }
1365                break;
1366        case CMD_PROTOCOL_ERR:
1367                cmd->result = DID_ERROR << 16;
1368                dev_warn(&h->pdev->dev, "cp %p has "
1369                        "protocol error\n", cp);
1370                break;
1371        case CMD_HARDWARE_ERR:
1372                cmd->result = DID_ERROR << 16;
1373                dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1374                break;
1375        case CMD_CONNECTION_LOST:
1376                cmd->result = DID_ERROR << 16;
1377                dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1378                break;
1379        case CMD_ABORTED:
1380                cmd->result = DID_ABORT << 16;
1381                dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1382                                cp, ei->ScsiStatus);
1383                break;
1384        case CMD_ABORT_FAILED:
1385                cmd->result = DID_ERROR << 16;
1386                dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1387                break;
1388        case CMD_UNSOLICITED_ABORT:
1389                cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
1390                dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited "
1391                        "abort\n", cp);
1392                break;
1393        case CMD_TIMEOUT:
1394                cmd->result = DID_TIME_OUT << 16;
1395                dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1396                break;
1397        case CMD_UNABORTABLE:
1398                cmd->result = DID_ERROR << 16;
1399                dev_warn(&h->pdev->dev, "Command unabortable\n");
1400                break;
1401        default:
1402                cmd->result = DID_ERROR << 16;
1403                dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1404                                cp, ei->CommandStatus);
1405        }
1406        cmd_free(h, cp);
1407        cmd->scsi_done(cmd);
1408}
1409
1410static void hpsa_pci_unmap(struct pci_dev *pdev,
1411        struct CommandList *c, int sg_used, int data_direction)
1412{
1413        int i;
1414        union u64bit addr64;
1415
1416        for (i = 0; i < sg_used; i++) {
1417                addr64.val32.lower = c->SG[i].Addr.lower;
1418                addr64.val32.upper = c->SG[i].Addr.upper;
1419                pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1420                        data_direction);
1421        }
1422}
1423
1424static int hpsa_map_one(struct pci_dev *pdev,
1425                struct CommandList *cp,
1426                unsigned char *buf,
1427                size_t buflen,
1428                int data_direction)
1429{
1430        u64 addr64;
1431
1432        if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1433                cp->Header.SGList = 0;
1434                cp->Header.SGTotal = 0;
1435                return 0;
1436        }
1437
1438        addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1439        if (dma_mapping_error(&pdev->dev, addr64)) {
1440                /* Prevent subsequent unmap of something never mapped */
1441                cp->Header.SGList = 0;
1442                cp->Header.SGTotal = 0;
1443                return -1;
1444        }
1445        cp->SG[0].Addr.lower =
1446          (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1447        cp->SG[0].Addr.upper =
1448          (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1449        cp->SG[0].Len = buflen;
1450        cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1451        cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1452        return 0;
1453}
1454
1455static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1456        struct CommandList *c)
1457{
1458        DECLARE_COMPLETION_ONSTACK(wait);
1459
1460        c->waiting = &wait;
1461        enqueue_cmd_and_start_io(h, c);
1462        wait_for_completion(&wait);
1463}
1464
1465static void hpsa_scsi_do_simple_cmd_core_if_no_lockup(struct ctlr_info *h,
1466        struct CommandList *c)
1467{
1468        unsigned long flags;
1469
1470        /* If controller lockup detected, fake a hardware error. */
1471        spin_lock_irqsave(&h->lock, flags);
1472        if (unlikely(h->lockup_detected)) {
1473                spin_unlock_irqrestore(&h->lock, flags);
1474                c->err_info->CommandStatus = CMD_HARDWARE_ERR;
1475        } else {
1476                spin_unlock_irqrestore(&h->lock, flags);
1477                hpsa_scsi_do_simple_cmd_core(h, c);
1478        }
1479}
1480
1481#define MAX_DRIVER_CMD_RETRIES 25
1482static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1483        struct CommandList *c, int data_direction)
1484{
1485        int backoff_time = 10, retry_count = 0;
1486
1487        do {
1488                memset(c->err_info, 0, sizeof(*c->err_info));
1489                hpsa_scsi_do_simple_cmd_core(h, c);
1490                retry_count++;
1491                if (retry_count > 3) {
1492                        msleep(backoff_time);
1493                        if (backoff_time < 1000)
1494                                backoff_time *= 2;
1495                }
1496        } while ((check_for_unit_attention(h, c) ||
1497                        check_for_busy(h, c)) &&
1498                        retry_count <= MAX_DRIVER_CMD_RETRIES);
1499        hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1500}
1501
1502static void hpsa_scsi_interpret_error(struct CommandList *cp)
1503{
1504        struct ErrorInfo *ei;
1505        struct device *d = &cp->h->pdev->dev;
1506
1507        ei = cp->err_info;
1508        switch (ei->CommandStatus) {
1509        case CMD_TARGET_STATUS:
1510                dev_warn(d, "cmd %p has completed with errors\n", cp);
1511                dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1512                                ei->ScsiStatus);
1513                if (ei->ScsiStatus == 0)
1514                        dev_warn(d, "SCSI status is abnormally zero.  "
1515                        "(probably indicates selection timeout "
1516                        "reported incorrectly due to a known "
1517                        "firmware bug, circa July, 2001.)\n");
1518                break;
1519        case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1520                        dev_info(d, "UNDERRUN\n");
1521                break;
1522        case CMD_DATA_OVERRUN:
1523                dev_warn(d, "cp %p has completed with data overrun\n", cp);
1524                break;
1525        case CMD_INVALID: {
1526                /* controller unfortunately reports SCSI passthru's
1527                 * to non-existent targets as invalid commands.
1528                 */
1529                dev_warn(d, "cp %p is reported invalid (probably means "
1530                        "target device no longer present)\n", cp);
1531                /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1532                print_cmd(cp);  */
1533                }
1534                break;
1535        case CMD_PROTOCOL_ERR:
1536                dev_warn(d, "cp %p has protocol error \n", cp);
1537                break;
1538        case CMD_HARDWARE_ERR:
1539                /* cmd->result = DID_ERROR << 16; */
1540                dev_warn(d, "cp %p had hardware error\n", cp);
1541                break;
1542        case CMD_CONNECTION_LOST:
1543                dev_warn(d, "cp %p had connection lost\n", cp);
1544                break;
1545        case CMD_ABORTED:
1546                dev_warn(d, "cp %p was aborted\n", cp);
1547                break;
1548        case CMD_ABORT_FAILED:
1549                dev_warn(d, "cp %p reports abort failed\n", cp);
1550                break;
1551        case CMD_UNSOLICITED_ABORT:
1552                dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1553                break;
1554        case CMD_TIMEOUT:
1555                dev_warn(d, "cp %p timed out\n", cp);
1556                break;
1557        case CMD_UNABORTABLE:
1558                dev_warn(d, "Command unabortable\n");
1559                break;
1560        default:
1561                dev_warn(d, "cp %p returned unknown status %x\n", cp,
1562                                ei->CommandStatus);
1563        }
1564}
1565
1566static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1567                        unsigned char page, unsigned char *buf,
1568                        unsigned char bufsize)
1569{
1570        int rc = IO_OK;
1571        struct CommandList *c;
1572        struct ErrorInfo *ei;
1573
1574        c = cmd_special_alloc(h);
1575
1576        if (c == NULL) {                        /* trouble... */
1577                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1578                return -ENOMEM;
1579        }
1580
1581        if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
1582                        page, scsi3addr, TYPE_CMD)) {
1583                rc = -1;
1584                goto out;
1585        }
1586        hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1587        ei = c->err_info;
1588        if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1589                hpsa_scsi_interpret_error(c);
1590                rc = -1;
1591        }
1592out:
1593        cmd_special_free(h, c);
1594        return rc;
1595}
1596
1597static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1598{
1599        int rc = IO_OK;
1600        struct CommandList *c;
1601        struct ErrorInfo *ei;
1602
1603        c = cmd_special_alloc(h);
1604
1605        if (c == NULL) {                        /* trouble... */
1606                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1607                return -ENOMEM;
1608        }
1609
1610        /* fill_cmd can't fail here, no data buffer to map. */
1611        (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h,
1612                        NULL, 0, 0, scsi3addr, TYPE_MSG);
1613        hpsa_scsi_do_simple_cmd_core(h, c);
1614        /* no unmap needed here because no data xfer. */
1615
1616        ei = c->err_info;
1617        if (ei->CommandStatus != 0) {
1618                hpsa_scsi_interpret_error(c);
1619                rc = -1;
1620        }
1621        cmd_special_free(h, c);
1622        return rc;
1623}
1624
1625static void hpsa_get_raid_level(struct ctlr_info *h,
1626        unsigned char *scsi3addr, unsigned char *raid_level)
1627{
1628        int rc;
1629        unsigned char *buf;
1630
1631        *raid_level = RAID_UNKNOWN;
1632        buf = kzalloc(64, GFP_KERNEL);
1633        if (!buf)
1634                return;
1635        rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1636        if (rc == 0)
1637                *raid_level = buf[8];
1638        if (*raid_level > RAID_UNKNOWN)
1639                *raid_level = RAID_UNKNOWN;
1640        kfree(buf);
1641        return;
1642}
1643
1644/* Get the device id from inquiry page 0x83 */
1645static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1646        unsigned char *device_id, int buflen)
1647{
1648        int rc;
1649        unsigned char *buf;
1650
1651        if (buflen > 16)
1652                buflen = 16;
1653        buf = kzalloc(64, GFP_KERNEL);
1654        if (!buf)
1655                return -1;
1656        rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1657        if (rc == 0)
1658                memcpy(device_id, &buf[8], buflen);
1659        kfree(buf);
1660        return rc != 0;
1661}
1662
1663static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1664                struct ReportLUNdata *buf, int bufsize,
1665                int extended_response)
1666{
1667        int rc = IO_OK;
1668        struct CommandList *c;
1669        unsigned char scsi3addr[8];
1670        struct ErrorInfo *ei;
1671
1672        c = cmd_special_alloc(h);
1673        if (c == NULL) {                        /* trouble... */
1674                dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1675                return -1;
1676        }
1677        /* address the controller */
1678        memset(scsi3addr, 0, sizeof(scsi3addr));
1679        if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1680                buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
1681                rc = -1;
1682                goto out;
1683        }
1684        if (extended_response)
1685                c->Request.CDB[1] = extended_response;
1686        hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1687        ei = c->err_info;
1688        if (ei->CommandStatus != 0 &&
1689            ei->CommandStatus != CMD_DATA_UNDERRUN) {
1690                hpsa_scsi_interpret_error(c);
1691                rc = -1;
1692        }
1693out:
1694        cmd_special_free(h, c);
1695        return rc;
1696}
1697
1698static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1699                struct ReportLUNdata *buf,
1700                int bufsize, int extended_response)
1701{
1702        return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1703}
1704
1705static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1706                struct ReportLUNdata *buf, int bufsize)
1707{
1708        return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1709}
1710
1711static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1712        int bus, int target, int lun)
1713{
1714        device->bus = bus;
1715        device->target = target;
1716        device->lun = lun;
1717}
1718
1719static int hpsa_update_device_info(struct ctlr_info *h,
1720        unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
1721        unsigned char *is_OBDR_device)
1722{
1723
1724#define OBDR_SIG_OFFSET 43
1725#define OBDR_TAPE_SIG "$DR-10"
1726#define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
1727#define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
1728
1729        unsigned char *inq_buff;
1730        unsigned char *obdr_sig;
1731
1732        inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1733        if (!inq_buff)
1734                goto bail_out;
1735
1736        /* Do an inquiry to the device to see what it is. */
1737        if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1738                (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1739                /* Inquiry failed (msg printed already) */
1740                dev_err(&h->pdev->dev,
1741                        "hpsa_update_device_info: inquiry failed\n");
1742                goto bail_out;
1743        }
1744
1745        this_device->devtype = (inq_buff[0] & 0x1f);
1746        memcpy(this_device->scsi3addr, scsi3addr, 8);
1747        memcpy(this_device->vendor, &inq_buff[8],
1748                sizeof(this_device->vendor));
1749        memcpy(this_device->model, &inq_buff[16],
1750                sizeof(this_device->model));
1751        memset(this_device->device_id, 0,
1752                sizeof(this_device->device_id));
1753        hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1754                sizeof(this_device->device_id));
1755
1756        if (this_device->devtype == TYPE_DISK &&
1757                is_logical_dev_addr_mode(scsi3addr))
1758                hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1759        else
1760                this_device->raid_level = RAID_UNKNOWN;
1761
1762        if (is_OBDR_device) {
1763                /* See if this is a One-Button-Disaster-Recovery device
1764                 * by looking for "$DR-10" at offset 43 in inquiry data.
1765                 */
1766                obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
1767                *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
1768                                        strncmp(obdr_sig, OBDR_TAPE_SIG,
1769                                                OBDR_SIG_LEN) == 0);
1770        }
1771
1772        kfree(inq_buff);
1773        return 0;
1774
1775bail_out:
1776        kfree(inq_buff);
1777        return 1;
1778}
1779
1780static unsigned char *ext_target_model[] = {
1781        "MSA2012",
1782        "MSA2024",
1783        "MSA2312",
1784        "MSA2324",
1785        "P2000 G3 SAS",
1786        NULL,
1787};
1788
1789static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1790{
1791        int i;
1792
1793        for (i = 0; ext_target_model[i]; i++)
1794                if (strncmp(device->model, ext_target_model[i],
1795                        strlen(ext_target_model[i])) == 0)
1796                        return 1;
1797        return 0;
1798}
1799
1800/* Helper function to assign bus, target, lun mapping of devices.
1801 * Puts non-external target logical volumes on bus 0, external target logical
1802 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1803 * Logical drive target and lun are assigned at this time, but
1804 * physical device lun and target assignment are deferred (assigned
1805 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1806 */
1807static void figure_bus_target_lun(struct ctlr_info *h,
1808        u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
1809{
1810        u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1811
1812        if (!is_logical_dev_addr_mode(lunaddrbytes)) {
1813                /* physical device, target and lun filled in later */
1814                if (is_hba_lunid(lunaddrbytes))
1815                        hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff);
1816                else
1817                        /* defer target, lun assignment for physical devices */
1818                        hpsa_set_bus_target_lun(device, 2, -1, -1);
1819                return;
1820        }
1821        /* It's a logical device */
1822        if (is_ext_target(h, device)) {
1823                /* external target way, put logicals on bus 1
1824                 * and match target/lun numbers box
1825                 * reports, other smart array, bus 0, target 0, match lunid
1826                 */
1827                hpsa_set_bus_target_lun(device,
1828                        1, (lunid >> 16) & 0x3fff, lunid & 0x00ff);
1829                return;
1830        }
1831        hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff);
1832}
1833
1834/*
1835 * If there is no lun 0 on a target, linux won't find any devices.
1836 * For the external targets (arrays), we have to manually detect the enclosure
1837 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1838 * it for some reason.  *tmpdevice is the target we're adding,
1839 * this_device is a pointer into the current element of currentsd[]
1840 * that we're building up in update_scsi_devices(), below.
1841 * lunzerobits is a bitmap that tracks which targets already have a
1842 * lun 0 assigned.
1843 * Returns 1 if an enclosure was added, 0 if not.
1844 */
1845static int add_ext_target_dev(struct ctlr_info *h,
1846        struct hpsa_scsi_dev_t *tmpdevice,
1847        struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1848        unsigned long lunzerobits[], int *n_ext_target_devs)
1849{
1850        unsigned char scsi3addr[8];
1851
1852        if (test_bit(tmpdevice->target, lunzerobits))
1853                return 0; /* There is already a lun 0 on this target. */
1854
1855        if (!is_logical_dev_addr_mode(lunaddrbytes))
1856                return 0; /* It's the logical targets that may lack lun 0. */
1857
1858        if (!is_ext_target(h, tmpdevice))
1859                return 0; /* Only external target devices have this problem. */
1860
1861        if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
1862                return 0;
1863
1864        memset(scsi3addr, 0, 8);
1865        scsi3addr[3] = tmpdevice->target;
1866        if (is_hba_lunid(scsi3addr))
1867                return 0; /* Don't add the RAID controller here. */
1868
1869        if (is_scsi_rev_5(h))
1870                return 0; /* p1210m doesn't need to do this. */
1871
1872        if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
1873                dev_warn(&h->pdev->dev, "Maximum number of external "
1874                        "target devices exceeded.  Check your hardware "
1875                        "configuration.");
1876                return 0;
1877        }
1878
1879        if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1880                return 0;
1881        (*n_ext_target_devs)++;
1882        hpsa_set_bus_target_lun(this_device,
1883                                tmpdevice->bus, tmpdevice->target, 0);
1884        set_bit(tmpdevice->target, lunzerobits);
1885        return 1;
1886}
1887
1888/*
1889 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1890 * logdev.  The number of luns in physdev and logdev are returned in
1891 * *nphysicals and *nlogicals, respectively.
1892 * Returns 0 on success, -1 otherwise.
1893 */
1894static int hpsa_gather_lun_info(struct ctlr_info *h,
1895        int reportlunsize,
1896        struct ReportLUNdata *physdev, u32 *nphysicals,
1897        struct ReportLUNdata *logdev, u32 *nlogicals)
1898{
1899        if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1900                dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1901                return -1;
1902        }
1903        *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1904        if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1905                dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1906                        "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1907                        *nphysicals - HPSA_MAX_PHYS_LUN);
1908                *nphysicals = HPSA_MAX_PHYS_LUN;
1909        }
1910        if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1911                dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1912                return -1;
1913        }
1914        *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1915        /* Reject Logicals in excess of our max capability. */
1916        if (*nlogicals > HPSA_MAX_LUN) {
1917                dev_warn(&h->pdev->dev,
1918                        "maximum logical LUNs (%d) exceeded.  "
1919                        "%d LUNs ignored.\n", HPSA_MAX_LUN,
1920                        *nlogicals - HPSA_MAX_LUN);
1921                        *nlogicals = HPSA_MAX_LUN;
1922        }
1923        if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1924                dev_warn(&h->pdev->dev,
1925                        "maximum logical + physical LUNs (%d) exceeded. "
1926                        "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1927                        *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1928                *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1929        }
1930        return 0;
1931}
1932
1933u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1934        int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1935        struct ReportLUNdata *logdev_list)
1936{
1937        /* Helper function, figure out where the LUN ID info is coming from
1938         * given index i, lists of physical and logical devices, where in
1939         * the list the raid controller is supposed to appear (first or last)
1940         */
1941
1942        int logicals_start = nphysicals + (raid_ctlr_position == 0);
1943        int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1944
1945        if (i == raid_ctlr_position)
1946                return RAID_CTLR_LUNID;
1947
1948        if (i < logicals_start)
1949                return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1950
1951        if (i < last_device)
1952                return &logdev_list->LUN[i - nphysicals -
1953                        (raid_ctlr_position == 0)][0];
1954        BUG();
1955        return NULL;
1956}
1957
1958static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1959{
1960        /* the idea here is we could get notified
1961         * that some devices have changed, so we do a report
1962         * physical luns and report logical luns cmd, and adjust
1963         * our list of devices accordingly.
1964         *
1965         * The scsi3addr's of devices won't change so long as the
1966         * adapter is not reset.  That means we can rescan and
1967         * tell which devices we already know about, vs. new
1968         * devices, vs.  disappearing devices.
1969         */
1970        struct ReportLUNdata *physdev_list = NULL;
1971        struct ReportLUNdata *logdev_list = NULL;
1972        u32 nphysicals = 0;
1973        u32 nlogicals = 0;
1974        u32 ndev_allocated = 0;
1975        struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1976        int ncurrent = 0;
1977        int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1978        int i, n_ext_target_devs, ndevs_to_allocate;
1979        int raid_ctlr_position;
1980        DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
1981
1982        currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
1983        physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1984        logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1985        tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1986
1987        if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1988                dev_err(&h->pdev->dev, "out of memory\n");
1989                goto out;
1990        }
1991        memset(lunzerobits, 0, sizeof(lunzerobits));
1992
1993        if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1994                        logdev_list, &nlogicals))
1995                goto out;
1996
1997        /* We might see up to the maximum number of logical and physical disks
1998         * plus external target devices, and a device for the local RAID
1999         * controller.
2000         */
2001        ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
2002
2003        /* Allocate the per device structures */
2004        for (i = 0; i < ndevs_to_allocate; i++) {
2005                if (i >= HPSA_MAX_DEVICES) {
2006                        dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
2007                                "  %d devices ignored.\n", HPSA_MAX_DEVICES,
2008                                ndevs_to_allocate - HPSA_MAX_DEVICES);
2009                        break;
2010                }
2011
2012                currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
2013                if (!currentsd[i]) {
2014                        dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
2015                                __FILE__, __LINE__);
2016                        goto out;
2017                }
2018                ndev_allocated++;
2019        }
2020
2021        if (unlikely(is_scsi_rev_5(h)))
2022                raid_ctlr_position = 0;
2023        else
2024                raid_ctlr_position = nphysicals + nlogicals;
2025
2026        /* adjust our table of devices */
2027        n_ext_target_devs = 0;
2028        for (i = 0; i < nphysicals + nlogicals + 1; i++) {
2029                u8 *lunaddrbytes, is_OBDR = 0;
2030
2031                /* Figure out where the LUN ID info is coming from */
2032                lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
2033                        i, nphysicals, nlogicals, physdev_list, logdev_list);
2034                /* skip masked physical devices. */
2035                if (lunaddrbytes[3] & 0xC0 &&
2036                        i < nphysicals + (raid_ctlr_position == 0))
2037                        continue;
2038
2039                /* Get device type, vendor, model, device id */
2040                if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
2041                                                        &is_OBDR))
2042                        continue; /* skip it if we can't talk to it. */
2043                figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
2044                this_device = currentsd[ncurrent];
2045
2046                /*
2047                 * For external target devices, we have to insert a LUN 0 which
2048                 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
2049                 * is nonetheless an enclosure device there.  We have to
2050                 * present that otherwise linux won't find anything if
2051                 * there is no lun 0.
2052                 */
2053                if (add_ext_target_dev(h, tmpdevice, this_device,
2054                                lunaddrbytes, lunzerobits,
2055                                &n_ext_target_devs)) {
2056                        ncurrent++;
2057                        this_device = currentsd[ncurrent];
2058                }
2059
2060                *this_device = *tmpdevice;
2061
2062                switch (this_device->devtype) {
2063                case TYPE_ROM:
2064                        /* We don't *really* support actual CD-ROM devices,
2065                         * just "One Button Disaster Recovery" tape drive
2066                         * which temporarily pretends to be a CD-ROM drive.
2067                         * So we check that the device is really an OBDR tape
2068                         * device by checking for "$DR-10" in bytes 43-48 of
2069                         * the inquiry data.
2070                         */
2071                        if (is_OBDR)
2072                                ncurrent++;
2073                        break;
2074                case TYPE_DISK:
2075                        if (i < nphysicals)
2076                                break;
2077                        ncurrent++;
2078                        break;
2079                case TYPE_TAPE:
2080                case TYPE_MEDIUM_CHANGER:
2081                        ncurrent++;
2082                        break;
2083                case TYPE_RAID:
2084                        /* Only present the Smartarray HBA as a RAID controller.
2085                         * If it's a RAID controller other than the HBA itself
2086                         * (an external RAID controller, MSA500 or similar)
2087                         * don't present it.
2088                         */
2089                        if (!is_hba_lunid(lunaddrbytes))
2090                                break;
2091                        ncurrent++;
2092                        break;
2093                default:
2094                        break;
2095                }
2096                if (ncurrent >= HPSA_MAX_DEVICES)
2097                        break;
2098        }
2099        adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
2100out:
2101        kfree(tmpdevice);
2102        for (i = 0; i < ndev_allocated; i++)
2103                kfree(currentsd[i]);
2104        kfree(currentsd);
2105        kfree(physdev_list);
2106        kfree(logdev_list);
2107}
2108
2109/* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
2110 * dma mapping  and fills in the scatter gather entries of the
2111 * hpsa command, cp.
2112 */
2113static int hpsa_scatter_gather(struct ctlr_info *h,
2114                struct CommandList *cp,
2115                struct scsi_cmnd *cmd)
2116{
2117        unsigned int len;
2118        struct scatterlist *sg;
2119        u64 addr64;
2120        int use_sg, i, sg_index, chained;
2121        struct SGDescriptor *curr_sg;
2122
2123        BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
2124
2125        use_sg = scsi_dma_map(cmd);
2126        if (use_sg < 0)
2127                return use_sg;
2128
2129        if (!use_sg)
2130                goto sglist_finished;
2131
2132        curr_sg = cp->SG;
2133        chained = 0;
2134        sg_index = 0;
2135        scsi_for_each_sg(cmd, sg, use_sg, i) {
2136                if (i == h->max_cmd_sg_entries - 1 &&
2137                        use_sg > h->max_cmd_sg_entries) {
2138                        chained = 1;
2139                        curr_sg = h->cmd_sg_list[cp->cmdindex];
2140                        sg_index = 0;
2141                }
2142                addr64 = (u64) sg_dma_address(sg);
2143                len  = sg_dma_len(sg);
2144                curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
2145                curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
2146                curr_sg->Len = len;
2147                curr_sg->Ext = 0;  /* we are not chaining */
2148                curr_sg++;
2149        }
2150
2151        if (use_sg + chained > h->maxSG)
2152                h->maxSG = use_sg + chained;
2153
2154        if (chained) {
2155                cp->Header.SGList = h->max_cmd_sg_entries;
2156                cp->Header.SGTotal = (u16) (use_sg + 1);
2157                if (hpsa_map_sg_chain_block(h, cp)) {
2158                        scsi_dma_unmap(cmd);
2159                        return -1;
2160                }
2161                return 0;
2162        }
2163
2164sglist_finished:
2165
2166        cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
2167        cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2168        return 0;
2169}
2170
2171
2172static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2173        void (*done)(struct scsi_cmnd *))
2174{
2175        struct ctlr_info *h;
2176        struct hpsa_scsi_dev_t *dev;
2177        unsigned char scsi3addr[8];
2178        struct CommandList *c;
2179        unsigned long flags;
2180
2181        /* Get the ptr to our adapter structure out of cmd->host. */
2182        h = sdev_to_hba(cmd->device);
2183        dev = cmd->device->hostdata;
2184        if (!dev) {
2185                cmd->result = DID_NO_CONNECT << 16;
2186                done(cmd);
2187                return 0;
2188        }
2189        memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
2190
2191        spin_lock_irqsave(&h->lock, flags);
2192        if (unlikely(h->lockup_detected)) {
2193                spin_unlock_irqrestore(&h->lock, flags);
2194                cmd->result = DID_ERROR << 16;
2195                done(cmd);
2196                return 0;
2197        }
2198        spin_unlock_irqrestore(&h->lock, flags);
2199        c = cmd_alloc(h);
2200        if (c == NULL) {                        /* trouble... */
2201                dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2202                return SCSI_MLQUEUE_HOST_BUSY;
2203        }
2204
2205        /* Fill in the command list header */
2206
2207        cmd->scsi_done = done;    /* save this for use by completion code */
2208
2209        /* save c in case we have to abort it  */
2210        cmd->host_scribble = (unsigned char *) c;
2211
2212        c->cmd_type = CMD_SCSI;
2213        c->scsi_cmd = cmd;
2214        c->Header.ReplyQueue = 0;  /* unused in simple mode */
2215        memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
2216        c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
2217        c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2218
2219        /* Fill in the request block... */
2220
2221        c->Request.Timeout = 0;
2222        memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
2223        BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
2224        c->Request.CDBLen = cmd->cmd_len;
2225        memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
2226        c->Request.Type.Type = TYPE_CMD;
2227        c->Request.Type.Attribute = ATTR_SIMPLE;
2228        switch (cmd->sc_data_direction) {
2229        case DMA_TO_DEVICE:
2230                c->Request.Type.Direction = XFER_WRITE;
2231                break;
2232        case DMA_FROM_DEVICE:
2233                c->Request.Type.Direction = XFER_READ;
2234                break;
2235        case DMA_NONE:
2236                c->Request.Type.Direction = XFER_NONE;
2237                break;
2238        case DMA_BIDIRECTIONAL:
2239                /* This can happen if a buggy application does a scsi passthru
2240                 * and sets both inlen and outlen to non-zero. ( see
2241                 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2242                 */
2243
2244                c->Request.Type.Direction = XFER_RSVD;
2245                /* This is technically wrong, and hpsa controllers should
2246                 * reject it with CMD_INVALID, which is the most correct
2247                 * response, but non-fibre backends appear to let it
2248                 * slide by, and give the same results as if this field
2249                 * were set correctly.  Either way is acceptable for
2250                 * our purposes here.
2251                 */
2252
2253                break;
2254
2255        default:
2256                dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2257                        cmd->sc_data_direction);
2258                BUG();
2259                break;
2260        }
2261
2262        if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2263                cmd_free(h, c);
2264                return SCSI_MLQUEUE_HOST_BUSY;
2265        }
2266        enqueue_cmd_and_start_io(h, c);
2267        /* the cmd'll come back via intr handler in complete_scsi_command()  */
2268        return 0;
2269}
2270
2271static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2272
2273static void hpsa_scan_start(struct Scsi_Host *sh)
2274{
2275        struct ctlr_info *h = shost_to_hba(sh);
2276        unsigned long flags;
2277
2278        /* wait until any scan already in progress is finished. */
2279        while (1) {
2280                spin_lock_irqsave(&h->scan_lock, flags);
2281                if (h->scan_finished)
2282                        break;
2283                spin_unlock_irqrestore(&h->scan_lock, flags);
2284                wait_event(h->scan_wait_queue, h->scan_finished);
2285                /* Note: We don't need to worry about a race between this
2286                 * thread and driver unload because the midlayer will
2287                 * have incremented the reference count, so unload won't
2288                 * happen if we're in here.
2289                 */
2290        }
2291        h->scan_finished = 0; /* mark scan as in progress */
2292        spin_unlock_irqrestore(&h->scan_lock, flags);
2293
2294        hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2295
2296        spin_lock_irqsave(&h->scan_lock, flags);
2297        h->scan_finished = 1; /* mark scan as finished. */
2298        wake_up_all(&h->scan_wait_queue);
2299        spin_unlock_irqrestore(&h->scan_lock, flags);
2300}
2301
2302static int hpsa_scan_finished(struct Scsi_Host *sh,
2303        unsigned long elapsed_time)
2304{
2305        struct ctlr_info *h = shost_to_hba(sh);
2306        unsigned long flags;
2307        int finished;
2308
2309        spin_lock_irqsave(&h->scan_lock, flags);
2310        finished = h->scan_finished;
2311        spin_unlock_irqrestore(&h->scan_lock, flags);
2312        return finished;
2313}
2314
2315static int hpsa_change_queue_depth(struct scsi_device *sdev,
2316        int qdepth, int reason)
2317{
2318        struct ctlr_info *h = sdev_to_hba(sdev);
2319
2320        if (reason != SCSI_QDEPTH_DEFAULT)
2321                return -ENOTSUPP;
2322
2323        if (qdepth < 1)
2324                qdepth = 1;
2325        else
2326                if (qdepth > h->nr_cmds)
2327                        qdepth = h->nr_cmds;
2328        scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2329        return sdev->queue_depth;
2330}
2331
2332static void hpsa_unregister_scsi(struct ctlr_info *h)
2333{
2334        /* we are being forcibly unloaded, and may not refuse. */
2335        scsi_remove_host(h->scsi_host);
2336        scsi_host_put(h->scsi_host);
2337        h->scsi_host = NULL;
2338}
2339
2340static int hpsa_register_scsi(struct ctlr_info *h)
2341{
2342        struct Scsi_Host *sh;
2343        int error;
2344
2345        sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
2346        if (sh == NULL)
2347                goto fail;
2348
2349        sh->io_port = 0;
2350        sh->n_io_port = 0;
2351        sh->this_id = -1;
2352        sh->max_channel = 3;
2353        sh->max_cmd_len = MAX_COMMAND_SIZE;
2354        sh->max_lun = HPSA_MAX_LUN;
2355        sh->max_id = HPSA_MAX_LUN;
2356        sh->can_queue = h->nr_cmds;
2357        sh->cmd_per_lun = h->nr_cmds;
2358        sh->sg_tablesize = h->maxsgentries;
2359        h->scsi_host = sh;
2360        sh->hostdata[0] = (unsigned long) h;
2361        sh->irq = h->intr[h->intr_mode];
2362        sh->unique_id = sh->irq;
2363        error = scsi_add_host(sh, &h->pdev->dev);
2364        if (error)
2365                goto fail_host_put;
2366        scsi_scan_host(sh);
2367        return 0;
2368
2369 fail_host_put:
2370        dev_err(&h->pdev->dev, "%s: scsi_add_host"
2371                " failed for controller %d\n", __func__, h->ctlr);
2372        scsi_host_put(sh);
2373        return error;
2374 fail:
2375        dev_err(&h->pdev->dev, "%s: scsi_host_alloc"
2376                " failed for controller %d\n", __func__, h->ctlr);
2377        return -ENOMEM;
2378}
2379
2380static int wait_for_device_to_become_ready(struct ctlr_info *h,
2381        unsigned char lunaddr[])
2382{
2383        int rc = 0;
2384        int count = 0;
2385        int waittime = 1; /* seconds */
2386        struct CommandList *c;
2387
2388        c = cmd_special_alloc(h);
2389        if (!c) {
2390                dev_warn(&h->pdev->dev, "out of memory in "
2391                        "wait_for_device_to_become_ready.\n");
2392                return IO_ERROR;
2393        }
2394
2395        /* Send test unit ready until device ready, or give up. */
2396        while (count < HPSA_TUR_RETRY_LIMIT) {
2397
2398                /* Wait for a bit.  do this first, because if we send
2399                 * the TUR right away, the reset will just abort it.
2400                 */
2401                msleep(1000 * waittime);
2402                count++;
2403
2404                /* Increase wait time with each try, up to a point. */
2405                if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2406                        waittime = waittime * 2;
2407
2408                /* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
2409                (void) fill_cmd(c, TEST_UNIT_READY, h,
2410                                NULL, 0, 0, lunaddr, TYPE_CMD);
2411                hpsa_scsi_do_simple_cmd_core(h, c);
2412                /* no unmap needed here because no data xfer. */
2413
2414                if (c->err_info->CommandStatus == CMD_SUCCESS)
2415                        break;
2416
2417                if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2418                        c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2419                        (c->err_info->SenseInfo[2] == NO_SENSE ||
2420                        c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2421                        break;
2422
2423                dev_warn(&h->pdev->dev, "waiting %d secs "
2424                        "for device to become ready.\n", waittime);
2425                rc = 1; /* device not ready. */
2426        }
2427
2428        if (rc)
2429                dev_warn(&h->pdev->dev, "giving up on device.\n");
2430        else
2431                dev_warn(&h->pdev->dev, "device is ready.\n");
2432
2433        cmd_special_free(h, c);
2434        return rc;
2435}
2436
2437/* Need at least one of these error handlers to keep ../scsi/hosts.c from
2438 * complaining.  Doing a host- or bus-reset can't do anything good here.
2439 */
2440static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2441{
2442        int rc;
2443        struct ctlr_info *h;
2444        struct hpsa_scsi_dev_t *dev;
2445
2446        /* find the controller to which the command to be aborted was sent */
2447        h = sdev_to_hba(scsicmd->device);
2448        if (h == NULL) /* paranoia */
2449                return FAILED;
2450        dev = scsicmd->device->hostdata;
2451        if (!dev) {
2452                dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2453                        "device lookup failed.\n");
2454                return FAILED;
2455        }
2456        dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2457                h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2458        /* send a reset to the SCSI LUN which the command was sent to */
2459        rc = hpsa_send_reset(h, dev->scsi3addr);
2460        if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2461                return SUCCESS;
2462
2463        dev_warn(&h->pdev->dev, "resetting device failed.\n");
2464        return FAILED;
2465}
2466
2467static void swizzle_abort_tag(u8 *tag)
2468{
2469        u8 original_tag[8];
2470
2471        memcpy(original_tag, tag, 8);
2472        tag[0] = original_tag[3];
2473        tag[1] = original_tag[2];
2474        tag[2] = original_tag[1];
2475        tag[3] = original_tag[0];
2476        tag[4] = original_tag[7];
2477        tag[5] = original_tag[6];
2478        tag[6] = original_tag[5];
2479        tag[7] = original_tag[4];
2480}
2481
2482static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
2483        struct CommandList *abort, int swizzle)
2484{
2485        int rc = IO_OK;
2486        struct CommandList *c;
2487        struct ErrorInfo *ei;
2488
2489        c = cmd_special_alloc(h);
2490        if (c == NULL) {        /* trouble... */
2491                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
2492                return -ENOMEM;
2493        }
2494
2495        /* fill_cmd can't fail here, no buffer to map */
2496        (void) fill_cmd(c, HPSA_ABORT_MSG, h, abort,
2497                0, 0, scsi3addr, TYPE_MSG);
2498        if (swizzle)
2499                swizzle_abort_tag(&c->Request.CDB[4]);
2500        hpsa_scsi_do_simple_cmd_core(h, c);
2501        dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd_core completed.\n",
2502                __func__, abort->Header.Tag.upper, abort->Header.Tag.lower);
2503        /* no unmap needed here because no data xfer. */
2504
2505        ei = c->err_info;
2506        switch (ei->CommandStatus) {
2507        case CMD_SUCCESS:
2508                break;
2509        case CMD_UNABORTABLE: /* Very common, don't make noise. */
2510                rc = -1;
2511                break;
2512        default:
2513                dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
2514                        __func__, abort->Header.Tag.upper,
2515                        abort->Header.Tag.lower);
2516                hpsa_scsi_interpret_error(c);
2517                rc = -1;
2518                break;
2519        }
2520        cmd_special_free(h, c);
2521        dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
2522                abort->Header.Tag.upper, abort->Header.Tag.lower);
2523        return rc;
2524}
2525
2526/*
2527 * hpsa_find_cmd_in_queue
2528 *
2529 * Used to determine whether a command (find) is still present
2530 * in queue_head.   Optionally excludes the last element of queue_head.
2531 *
2532 * This is used to avoid unnecessary aborts.  Commands in h->reqQ have
2533 * not yet been submitted, and so can be aborted by the driver without
2534 * sending an abort to the hardware.
2535 *
2536 * Returns pointer to command if found in queue, NULL otherwise.
2537 */
2538static struct CommandList *hpsa_find_cmd_in_queue(struct ctlr_info *h,
2539                        struct scsi_cmnd *find, struct list_head *queue_head)
2540{
2541        unsigned long flags;
2542        struct CommandList *c = NULL;   /* ptr into cmpQ */
2543
2544        if (!find)
2545                return 0;
2546        spin_lock_irqsave(&h->lock, flags);
2547        list_for_each_entry(c, queue_head, list) {
2548                if (c->scsi_cmd == NULL) /* e.g.: passthru ioctl */
2549                        continue;
2550                if (c->scsi_cmd == find) {
2551                        spin_unlock_irqrestore(&h->lock, flags);
2552                        return c;
2553                }
2554        }
2555        spin_unlock_irqrestore(&h->lock, flags);
2556        return NULL;
2557}
2558
2559static struct CommandList *hpsa_find_cmd_in_queue_by_tag(struct ctlr_info *h,
2560                                        u8 *tag, struct list_head *queue_head)
2561{
2562        unsigned long flags;
2563        struct CommandList *c;
2564
2565        spin_lock_irqsave(&h->lock, flags);
2566        list_for_each_entry(c, queue_head, list) {
2567                if (memcmp(&c->Header.Tag, tag, 8) != 0)
2568                        continue;
2569                spin_unlock_irqrestore(&h->lock, flags);
2570                return c;
2571        }
2572        spin_unlock_irqrestore(&h->lock, flags);
2573        return NULL;
2574}
2575
2576/* Some Smart Arrays need the abort tag swizzled, and some don't.  It's hard to
2577 * tell which kind we're dealing with, so we send the abort both ways.  There
2578 * shouldn't be any collisions between swizzled and unswizzled tags due to the
2579 * way we construct our tags but we check anyway in case the assumptions which
2580 * make this true someday become false.
2581 */
2582static int hpsa_send_abort_both_ways(struct ctlr_info *h,
2583        unsigned char *scsi3addr, struct CommandList *abort)
2584{
2585        u8 swizzled_tag[8];
2586        struct CommandList *c;
2587        int rc = 0, rc2 = 0;
2588
2589        /* we do not expect to find the swizzled tag in our queue, but
2590         * check anyway just to be sure the assumptions which make this
2591         * the case haven't become wrong.
2592         */
2593        memcpy(swizzled_tag, &abort->Request.CDB[4], 8);
2594        swizzle_abort_tag(swizzled_tag);
2595        c = hpsa_find_cmd_in_queue_by_tag(h, swizzled_tag, &h->cmpQ);
2596        if (c != NULL) {
2597                dev_warn(&h->pdev->dev, "Unexpectedly found byte-swapped tag in completion queue.\n");
2598                return hpsa_send_abort(h, scsi3addr, abort, 0);
2599        }
2600        rc = hpsa_send_abort(h, scsi3addr, abort, 0);
2601
2602        /* if the command is still in our queue, we can't conclude that it was
2603         * aborted (it might have just completed normally) but in any case
2604         * we don't need to try to abort it another way.
2605         */
2606        c = hpsa_find_cmd_in_queue(h, abort->scsi_cmd, &h->cmpQ);
2607        if (c)
2608                rc2 = hpsa_send_abort(h, scsi3addr, abort, 1);
2609        return rc && rc2;
2610}
2611
2612/* Send an abort for the specified command.
2613 *      If the device and controller support it,
2614 *              send a task abort request.
2615 */
2616static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
2617{
2618
2619        int i, rc;
2620        struct ctlr_info *h;
2621        struct hpsa_scsi_dev_t *dev;
2622        struct CommandList *abort; /* pointer to command to be aborted */
2623        struct CommandList *found;
2624        struct scsi_cmnd *as;   /* ptr to scsi cmd inside aborted command. */
2625        char msg[256];          /* For debug messaging. */
2626        int ml = 0;
2627
2628        /* Find the controller of the command to be aborted */
2629        h = sdev_to_hba(sc->device);
2630        if (WARN(h == NULL,
2631                        "ABORT REQUEST FAILED, Controller lookup failed.\n"))
2632                return FAILED;
2633
2634        /* Check that controller supports some kind of task abort */
2635        if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
2636                !(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
2637                return FAILED;
2638
2639        memset(msg, 0, sizeof(msg));
2640        ml += sprintf(msg+ml, "ABORT REQUEST on C%d:B%d:T%d:L%d ",
2641                h->scsi_host->host_no, sc->device->channel,
2642                sc->device->id, sc->device->lun);
2643
2644        /* Find the device of the command to be aborted */
2645        dev = sc->device->hostdata;
2646        if (!dev) {
2647                dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
2648                                msg);
2649                return FAILED;
2650        }
2651
2652        /* Get SCSI command to be aborted */
2653        abort = (struct CommandList *) sc->host_scribble;
2654        if (abort == NULL) {
2655                dev_err(&h->pdev->dev, "%s FAILED, Command to abort is NULL.\n",
2656                                msg);
2657                return FAILED;
2658        }
2659
2660        ml += sprintf(msg+ml, "Tag:0x%08x:%08x ",
2661                abort->Header.Tag.upper, abort->Header.Tag.lower);
2662        as  = (struct scsi_cmnd *) abort->scsi_cmd;
2663        if (as != NULL)
2664                ml += sprintf(msg+ml, "Command:0x%x SN:0x%lx ",
2665                        as->cmnd[0], as->serial_number);
2666        dev_dbg(&h->pdev->dev, "%s\n", msg);
2667        dev_warn(&h->pdev->dev, "Abort request on C%d:B%d:T%d:L%d\n",
2668                h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2669
2670        /* Search reqQ to See if command is queued but not submitted,
2671         * if so, complete the command with aborted status and remove
2672         * it from the reqQ.
2673         */
2674        found = hpsa_find_cmd_in_queue(h, sc, &h->reqQ);
2675        if (found) {
2676                found->err_info->CommandStatus = CMD_ABORTED;
2677                finish_cmd(found);
2678                dev_info(&h->pdev->dev, "%s Request SUCCEEDED (driver queue).\n",
2679                                msg);
2680                return SUCCESS;
2681        }
2682
2683        /* not in reqQ, if also not in cmpQ, must have already completed */
2684        found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
2685        if (!found)  {
2686                dev_dbg(&h->pdev->dev, "%s Request SUCCEEDED (not known to driver).\n",
2687                                msg);
2688                return SUCCESS;
2689        }
2690
2691        /*
2692         * Command is in flight, or possibly already completed
2693         * by the firmware (but not to the scsi mid layer) but we can't
2694         * distinguish which.  Send the abort down.
2695         */
2696        rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort);
2697        if (rc != 0) {
2698                dev_dbg(&h->pdev->dev, "%s Request FAILED.\n", msg);
2699                dev_warn(&h->pdev->dev, "FAILED abort on device C%d:B%d:T%d:L%d\n",
2700                        h->scsi_host->host_no,
2701                        dev->bus, dev->target, dev->lun);
2702                return FAILED;
2703        }
2704        dev_info(&h->pdev->dev, "%s REQUEST SUCCEEDED.\n", msg);
2705
2706        /* If the abort(s) above completed and actually aborted the
2707         * command, then the command to be aborted should already be
2708         * completed.  If not, wait around a bit more to see if they
2709         * manage to complete normally.
2710         */
2711#define ABORT_COMPLETE_WAIT_SECS 30
2712        for (i = 0; i < ABORT_COMPLETE_WAIT_SECS * 10; i++) {
2713                found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
2714                if (!found)
2715                        return SUCCESS;
2716                msleep(100);
2717        }
2718        dev_warn(&h->pdev->dev, "%s FAILED. Aborted command has not completed after %d seconds.\n",
2719                msg, ABORT_COMPLETE_WAIT_SECS);
2720        return FAILED;
2721}
2722
2723
2724/*
2725 * For operations that cannot sleep, a command block is allocated at init,
2726 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2727 * which ones are free or in use.  Lock must be held when calling this.
2728 * cmd_free() is the complement.
2729 */
2730static struct CommandList *cmd_alloc(struct ctlr_info *h)
2731{
2732        struct CommandList *c;
2733        int i;
2734        union u64bit temp64;
2735        dma_addr_t cmd_dma_handle, err_dma_handle;
2736        unsigned long flags;
2737
2738        spin_lock_irqsave(&h->lock, flags);
2739        do {
2740                i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2741                if (i == h->nr_cmds) {
2742                        spin_unlock_irqrestore(&h->lock, flags);
2743                        return NULL;
2744                }
2745        } while (test_and_set_bit
2746                 (i & (BITS_PER_LONG - 1),
2747                  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2748        spin_unlock_irqrestore(&h->lock, flags);
2749
2750        c = h->cmd_pool + i;
2751        memset(c, 0, sizeof(*c));
2752        cmd_dma_handle = h->cmd_pool_dhandle
2753            + i * sizeof(*c);
2754        c->err_info = h->errinfo_pool + i;
2755        memset(c->err_info, 0, sizeof(*c->err_info));
2756        err_dma_handle = h->errinfo_pool_dhandle
2757            + i * sizeof(*c->err_info);
2758
2759        c->cmdindex = i;
2760
2761        INIT_LIST_HEAD(&c->list);
2762        c->busaddr = (u32) cmd_dma_handle;
2763        temp64.val = (u64) err_dma_handle;
2764        c->ErrDesc.Addr.lower = temp64.val32.lower;
2765        c->ErrDesc.Addr.upper = temp64.val32.upper;
2766        c->ErrDesc.Len = sizeof(*c->err_info);
2767
2768        c->h = h;
2769        return c;
2770}
2771
2772/* For operations that can wait for kmalloc to possibly sleep,
2773 * this routine can be called. Lock need not be held to call
2774 * cmd_special_alloc. cmd_special_free() is the complement.
2775 */
2776static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2777{
2778        struct CommandList *c;
2779        union u64bit temp64;
2780        dma_addr_t cmd_dma_handle, err_dma_handle;
2781
2782        c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2783        if (c == NULL)
2784                return NULL;
2785        memset(c, 0, sizeof(*c));
2786
2787        c->cmdindex = -1;
2788
2789        c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2790                    &err_dma_handle);
2791
2792        if (c->err_info == NULL) {
2793                pci_free_consistent(h->pdev,
2794                        sizeof(*c), c, cmd_dma_handle);
2795                return NULL;
2796        }
2797        memset(c->err_info, 0, sizeof(*c->err_info));
2798
2799        INIT_LIST_HEAD(&c->list);
2800        c->busaddr = (u32) cmd_dma_handle;
2801        temp64.val = (u64) err_dma_handle;
2802        c->ErrDesc.Addr.lower = temp64.val32.lower;
2803        c->ErrDesc.Addr.upper = temp64.val32.upper;
2804        c->ErrDesc.Len = sizeof(*c->err_info);
2805
2806        c->h = h;
2807        return c;
2808}
2809
2810static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2811{
2812        int i;
2813        unsigned long flags;
2814
2815        i = c - h->cmd_pool;
2816        spin_lock_irqsave(&h->lock, flags);
2817        clear_bit(i & (BITS_PER_LONG - 1),
2818                  h->cmd_pool_bits + (i / BITS_PER_LONG));
2819        spin_unlock_irqrestore(&h->lock, flags);
2820}
2821
2822static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2823{
2824        union u64bit temp64;
2825
2826        temp64.val32.lower = c->ErrDesc.Addr.lower;
2827        temp64.val32.upper = c->ErrDesc.Addr.upper;
2828        pci_free_consistent(h->pdev, sizeof(*c->err_info),
2829                            c->err_info, (dma_addr_t) temp64.val);
2830        pci_free_consistent(h->pdev, sizeof(*c),
2831                            c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2832}
2833
2834#ifdef CONFIG_COMPAT
2835
2836static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2837{
2838        IOCTL32_Command_struct __user *arg32 =
2839            (IOCTL32_Command_struct __user *) arg;
2840        IOCTL_Command_struct arg64;
2841        IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2842        int err;
2843        u32 cp;
2844
2845        memset(&arg64, 0, sizeof(arg64));
2846        err = 0;
2847        err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2848                           sizeof(arg64.LUN_info));
2849        err |= copy_from_user(&arg64.Request, &arg32->Request,
2850                           sizeof(arg64.Request));
2851        err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2852                           sizeof(arg64.error_info));
2853        err |= get_user(arg64.buf_size, &arg32->buf_size);
2854        err |= get_user(cp, &arg32->buf);
2855        arg64.buf = compat_ptr(cp);
2856        err |= copy_to_user(p, &arg64, sizeof(arg64));
2857
2858        if (err)
2859                return -EFAULT;
2860
2861        err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2862        if (err)
2863                return err;
2864        err |= copy_in_user(&arg32->error_info, &p->error_info,
2865                         sizeof(arg32->error_info));
2866        if (err)
2867                return -EFAULT;
2868        return err;
2869}
2870
2871static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2872        int cmd, void *arg)
2873{
2874        BIG_IOCTL32_Command_struct __user *arg32 =
2875            (BIG_IOCTL32_Command_struct __user *) arg;
2876        BIG_IOCTL_Command_struct arg64;
2877        BIG_IOCTL_Command_struct __user *p =
2878            compat_alloc_user_space(sizeof(arg64));
2879        int err;
2880        u32 cp;
2881
2882        memset(&arg64, 0, sizeof(arg64));
2883        err = 0;
2884        err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2885                           sizeof(arg64.LUN_info));
2886        err |= copy_from_user(&arg64.Request, &arg32->Request,
2887                           sizeof(arg64.Request));
2888        err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2889                           sizeof(arg64.error_info));
2890        err |= get_user(arg64.buf_size, &arg32->buf_size);
2891        err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2892        err |= get_user(cp, &arg32->buf);
2893        arg64.buf = compat_ptr(cp);
2894        err |= copy_to_user(p, &arg64, sizeof(arg64));
2895
2896        if (err)
2897                return -EFAULT;
2898
2899        err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2900        if (err)
2901                return err;
2902        err |= copy_in_user(&arg32->error_info, &p->error_info,
2903                         sizeof(arg32->error_info));
2904        if (err)
2905                return -EFAULT;
2906        return err;
2907}
2908
2909static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2910{
2911        switch (cmd) {
2912        case CCISS_GETPCIINFO:
2913        case CCISS_GETINTINFO:
2914        case CCISS_SETINTINFO:
2915        case CCISS_GETNODENAME:
2916        case CCISS_SETNODENAME:
2917        case CCISS_GETHEARTBEAT:
2918        case CCISS_GETBUSTYPES:
2919        case CCISS_GETFIRMVER:
2920        case CCISS_GETDRIVVER:
2921        case CCISS_REVALIDVOLS:
2922        case CCISS_DEREGDISK:
2923        case CCISS_REGNEWDISK:
2924        case CCISS_REGNEWD:
2925        case CCISS_RESCANDISK:
2926        case CCISS_GETLUNINFO:
2927                return hpsa_ioctl(dev, cmd, arg);
2928
2929        case CCISS_PASSTHRU32:
2930                return hpsa_ioctl32_passthru(dev, cmd, arg);
2931        case CCISS_BIG_PASSTHRU32:
2932                return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2933
2934        default:
2935                return -ENOIOCTLCMD;
2936        }
2937}
2938#endif
2939
2940static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2941{
2942        struct hpsa_pci_info pciinfo;
2943
2944        if (!argp)
2945                return -EINVAL;
2946        pciinfo.domain = pci_domain_nr(h->pdev->bus);
2947        pciinfo.bus = h->pdev->bus->number;
2948        pciinfo.dev_fn = h->pdev->devfn;
2949        pciinfo.board_id = h->board_id;
2950        if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2951                return -EFAULT;
2952        return 0;
2953}
2954
2955static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2956{
2957        DriverVer_type DriverVer;
2958        unsigned char vmaj, vmin, vsubmin;
2959        int rc;
2960
2961        rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2962                &vmaj, &vmin, &vsubmin);
2963        if (rc != 3) {
2964                dev_info(&h->pdev->dev, "driver version string '%s' "
2965                        "unrecognized.", HPSA_DRIVER_VERSION);
2966                vmaj = 0;
2967                vmin = 0;
2968                vsubmin = 0;
2969        }
2970        DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2971        if (!argp)
2972                return -EINVAL;
2973        if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2974                return -EFAULT;
2975        return 0;
2976}
2977
2978static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2979{
2980        IOCTL_Command_struct iocommand;
2981        struct CommandList *c;
2982        char *buff = NULL;
2983        union u64bit temp64;
2984        int rc = 0;
2985
2986        if (!argp)
2987                return -EINVAL;
2988        if (!capable(CAP_SYS_RAWIO))
2989                return -EPERM;
2990        if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2991                return -EFAULT;
2992        if ((iocommand.buf_size < 1) &&
2993            (iocommand.Request.Type.Direction != XFER_NONE)) {
2994                return -EINVAL;
2995        }
2996        if (iocommand.buf_size > 0) {
2997                buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2998                if (buff == NULL)
2999                        return -EFAULT;
3000                if (iocommand.Request.Type.Direction == XFER_WRITE) {
3001                        /* Copy the data into the buffer we created */
3002                        if (copy_from_user(buff, iocommand.buf,
3003                                iocommand.buf_size)) {
3004                                rc = -EFAULT;
3005                                goto out_kfree;
3006                        }
3007                } else {
3008                        memset(buff, 0, iocommand.buf_size);
3009                }
3010        }
3011        c = cmd_special_alloc(h);
3012        if (c == NULL) {
3013                rc = -ENOMEM;
3014                goto out_kfree;
3015        }
3016        /* Fill in the command type */
3017        c->cmd_type = CMD_IOCTL_PEND;
3018        /* Fill in Command Header */
3019        c->Header.ReplyQueue = 0; /* unused in simple mode */
3020        if (iocommand.buf_size > 0) {   /* buffer to fill */
3021                c->Header.SGList = 1;
3022                c->Header.SGTotal = 1;
3023        } else  { /* no buffers to fill */
3024                c->Header.SGList = 0;
3025                c->Header.SGTotal = 0;
3026        }
3027        memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
3028        /* use the kernel address the cmd block for tag */
3029        c->Header.Tag.lower = c->busaddr;
3030
3031        /* Fill in Request block */
3032        memcpy(&c->Request, &iocommand.Request,
3033                sizeof(c->Request));
3034
3035        /* Fill in the scatter gather information */
3036        if (iocommand.buf_size > 0) {
3037                temp64.val = pci_map_single(h->pdev, buff,
3038                        iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
3039                if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
3040                        c->SG[0].Addr.lower = 0;
3041                        c->SG[0].Addr.upper = 0;
3042                        c->SG[0].Len = 0;
3043                        rc = -ENOMEM;
3044                        goto out;
3045                }
3046                c->SG[0].Addr.lower = temp64.val32.lower;
3047                c->SG[0].Addr.upper = temp64.val32.upper;
3048                c->SG[0].Len = iocommand.buf_size;
3049                c->SG[0].Ext = 0; /* we are not chaining*/
3050        }
3051        hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3052        if (iocommand.buf_size > 0)
3053                hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
3054        check_ioctl_unit_attention(h, c);
3055
3056        /* Copy the error information out */
3057        memcpy(&iocommand.error_info, c->err_info,
3058                sizeof(iocommand.error_info));
3059        if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
3060                rc = -EFAULT;
3061                goto out;
3062        }
3063        if (iocommand.Request.Type.Direction == XFER_READ &&
3064                iocommand.buf_size > 0) {
3065                /* Copy the data out of the buffer we created */
3066                if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
3067                        rc = -EFAULT;
3068                        goto out;
3069                }
3070        }
3071out:
3072        cmd_special_free(h, c);
3073out_kfree:
3074        kfree(buff);
3075        return rc;
3076}
3077
3078static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
3079{
3080        BIG_IOCTL_Command_struct *ioc;
3081        struct CommandList *c;
3082        unsigned char **buff = NULL;
3083        int *buff_size = NULL;
3084        union u64bit temp64;
3085        BYTE sg_used = 0;
3086        int status = 0;
3087        int i;
3088        u32 left;
3089        u32 sz;
3090        BYTE __user *data_ptr;
3091
3092        if (!argp)
3093                return -EINVAL;
3094        if (!capable(CAP_SYS_RAWIO))
3095                return -EPERM;
3096        ioc = (BIG_IOCTL_Command_struct *)
3097            kmalloc(sizeof(*ioc), GFP_KERNEL);
3098        if (!ioc) {
3099                status = -ENOMEM;
3100                goto cleanup1;
3101        }
3102        if (copy_from_user(ioc, argp, sizeof(*ioc))) {
3103                status = -EFAULT;
3104                goto cleanup1;
3105        }
3106        if ((ioc->buf_size < 1) &&
3107            (ioc->Request.Type.Direction != XFER_NONE)) {
3108                status = -EINVAL;
3109                goto cleanup1;
3110        }
3111        /* Check kmalloc limits  using all SGs */
3112        if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
3113                status = -EINVAL;
3114                goto cleanup1;
3115        }
3116        if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
3117                status = -EINVAL;
3118                goto cleanup1;
3119        }
3120        buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
3121        if (!buff) {
3122                status = -ENOMEM;
3123                goto cleanup1;
3124        }
3125        buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
3126        if (!buff_size) {
3127                status = -ENOMEM;
3128                goto cleanup1;
3129        }
3130        left = ioc->buf_size;
3131        data_ptr = ioc->buf;
3132        while (left) {
3133                sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
3134                buff_size[sg_used] = sz;
3135                buff[sg_used] = kmalloc(sz, GFP_KERNEL);
3136                if (buff[sg_used] == NULL) {
3137                        status = -ENOMEM;
3138                        goto cleanup1;
3139                }
3140                if (ioc->Request.Type.Direction == XFER_WRITE) {
3141                        if (copy_from_user(buff[sg_used], data_ptr, sz)) {
3142                                status = -ENOMEM;
3143                                goto cleanup1;
3144                        }
3145                } else
3146                        memset(buff[sg_used], 0, sz);
3147                left -= sz;
3148                data_ptr += sz;
3149                sg_used++;
3150        }
3151        c = cmd_special_alloc(h);
3152        if (c == NULL) {
3153                status = -ENOMEM;
3154                goto cleanup1;
3155        }
3156        c->cmd_type = CMD_IOCTL_PEND;
3157        c->Header.ReplyQueue = 0;
3158        c->Header.SGList = c->Header.SGTotal = sg_used;
3159        memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
3160        c->Header.Tag.lower = c->busaddr;
3161        memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
3162        if (ioc->buf_size > 0) {
3163                int i;
3164                for (i = 0; i < sg_used; i++) {
3165                        temp64.val = pci_map_single(h->pdev, buff[i],
3166                                    buff_size[i], PCI_DMA_BIDIRECTIONAL);
3167                        if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
3168                                c->SG[i].Addr.lower = 0;
3169                                c->SG[i].Addr.upper = 0;
3170                                c->SG[i].Len = 0;
3171                                hpsa_pci_unmap(h->pdev, c, i,
3172                                        PCI_DMA_BIDIRECTIONAL);
3173                                status = -ENOMEM;
3174                                goto cleanup1;
3175                        }
3176                        c->SG[i].Addr.lower = temp64.val32.lower;
3177                        c->SG[i].Addr.upper = temp64.val32.upper;
3178                        c->SG[i].Len = buff_size[i];
3179                        /* we are not chaining */
3180                        c->SG[i].Ext = 0;
3181                }
3182        }
3183        hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3184        if (sg_used)
3185                hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
3186        check_ioctl_unit_attention(h, c);
3187        /* Copy the error information out */
3188        memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
3189        if (copy_to_user(argp, ioc, sizeof(*ioc))) {
3190                cmd_special_free(h, c);
3191                status = -EFAULT;
3192                goto cleanup1;
3193        }
3194        if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
3195                /* Copy the data out of the buffer we created */
3196                BYTE __user *ptr = ioc->buf;
3197                for (i = 0; i < sg_used; i++) {
3198                        if (copy_to_user(ptr, buff[i], buff_size[i])) {
3199                                cmd_special_free(h, c);
3200                                status = -EFAULT;
3201                                goto cleanup1;
3202                        }
3203                        ptr += buff_size[i];
3204                }
3205        }
3206        cmd_special_free(h, c);
3207        status = 0;
3208cleanup1:
3209        if (buff) {
3210                for (i = 0; i < sg_used; i++)
3211                        kfree(buff[i]);
3212                kfree(buff);
3213        }
3214        kfree(buff_size);
3215        kfree(ioc);
3216        return status;
3217}
3218
3219static void check_ioctl_unit_attention(struct ctlr_info *h,
3220        struct CommandList *c)
3221{
3222        if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
3223                        c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
3224                (void) check_for_unit_attention(h, c);
3225}
3226/*
3227 * ioctl
3228 */
3229static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
3230{
3231        struct ctlr_info *h;
3232        void __user *argp = (void __user *)arg;
3233
3234        h = sdev_to_hba(dev);
3235
3236        switch (cmd) {
3237        case CCISS_DEREGDISK:
3238        case CCISS_REGNEWDISK:
3239        case CCISS_REGNEWD:
3240                hpsa_scan_start(h->scsi_host);
3241                return 0;
3242        case CCISS_GETPCIINFO:
3243                return hpsa_getpciinfo_ioctl(h, argp);
3244        case CCISS_GETDRIVVER:
3245                return hpsa_getdrivver_ioctl(h, argp);
3246        case CCISS_PASSTHRU:
3247                return hpsa_passthru_ioctl(h, argp);
3248        case CCISS_BIG_PASSTHRU:
3249                return hpsa_big_passthru_ioctl(h, argp);
3250        default:
3251                return -ENOTTY;
3252        }
3253}
3254
3255static int hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
3256                                u8 reset_type)
3257{
3258        struct CommandList *c;
3259
3260        c = cmd_alloc(h);
3261        if (!c)
3262                return -ENOMEM;
3263        /* fill_cmd can't fail here, no data buffer to map */
3264        (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
3265                RAID_CTLR_LUNID, TYPE_MSG);
3266        c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
3267        c->waiting = NULL;
3268        enqueue_cmd_and_start_io(h, c);
3269        /* Don't wait for completion, the reset won't complete.  Don't free
3270         * the command either.  This is the last command we will send before
3271         * re-initializing everything, so it doesn't matter and won't leak.
3272         */
3273        return 0;
3274}
3275
3276static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
3277        void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
3278        int cmd_type)
3279{
3280        int pci_dir = XFER_NONE;
3281        struct CommandList *a; /* for commands to be aborted */
3282
3283        c->cmd_type = CMD_IOCTL_PEND;
3284        c->Header.ReplyQueue = 0;
3285        if (buff != NULL && size > 0) {
3286                c->Header.SGList = 1;
3287                c->Header.SGTotal = 1;
3288        } else {
3289                c->Header.SGList = 0;
3290                c->Header.SGTotal = 0;
3291        }
3292        c->Header.Tag.lower = c->busaddr;
3293        memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
3294
3295        c->Request.Type.Type = cmd_type;
3296        if (cmd_type == TYPE_CMD) {
3297                switch (cmd) {
3298                case HPSA_INQUIRY:
3299                        /* are we trying to read a vital product page */
3300                        if (page_code != 0) {
3301                                c->Request.CDB[1] = 0x01;
3302                                c->Request.CDB[2] = page_code;
3303                        }
3304                        c->Request.CDBLen = 6;
3305                        c->Request.Type.Attribute = ATTR_SIMPLE;
3306                        c->Request.Type.Direction = XFER_READ;
3307                        c->Request.Timeout = 0;
3308                        c->Request.CDB[0] = HPSA_INQUIRY;
3309                        c->Request.CDB[4] = size & 0xFF;
3310                        break;
3311                case HPSA_REPORT_LOG:
3312                case HPSA_REPORT_PHYS:
3313                        /* Talking to controller so It's a physical command
3314                           mode = 00 target = 0.  Nothing to write.
3315                         */
3316                        c->Request.CDBLen = 12;
3317                        c->Request.Type.Attribute = ATTR_SIMPLE;
3318                        c->Request.Type.Direction = XFER_READ;
3319                        c->Request.Timeout = 0;
3320                        c->Request.CDB[0] = cmd;
3321                        c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
3322                        c->Request.CDB[7] = (size >> 16) & 0xFF;
3323                        c->Request.CDB[8] = (size >> 8) & 0xFF;
3324                        c->Request.CDB[9] = size & 0xFF;
3325                        break;
3326                case HPSA_CACHE_FLUSH:
3327                        c->Request.CDBLen = 12;
3328                        c->Request.Type.Attribute = ATTR_SIMPLE;
3329                        c->Request.Type.Direction = XFER_WRITE;
3330                        c->Request.Timeout = 0;
3331                        c->Request.CDB[0] = BMIC_WRITE;
3332                        c->Request.CDB[6] = BMIC_CACHE_FLUSH;
3333                        c->Request.CDB[7] = (size >> 8) & 0xFF;
3334                        c->Request.CDB[8] = size & 0xFF;
3335                        break;
3336                case TEST_UNIT_READY:
3337                        c->Request.CDBLen = 6;
3338                        c->Request.Type.Attribute = ATTR_SIMPLE;
3339                        c->Request.Type.Direction = XFER_NONE;
3340                        c->Request.Timeout = 0;
3341                        break;
3342                default:
3343                        dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
3344                        BUG();
3345                        return -1;
3346                }
3347        } else if (cmd_type == TYPE_MSG) {
3348                switch (cmd) {
3349
3350                case  HPSA_DEVICE_RESET_MSG:
3351                        c->Request.CDBLen = 16;
3352                        c->Request.Type.Type =  1; /* It is a MSG not a CMD */
3353                        c->Request.Type.Attribute = ATTR_SIMPLE;
3354                        c->Request.Type.Direction = XFER_NONE;
3355                        c->Request.Timeout = 0; /* Don't time out */
3356                        memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
3357                        c->Request.CDB[0] =  cmd;
3358                        c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
3359                        /* If bytes 4-7 are zero, it means reset the */
3360                        /* LunID device */
3361                        c->Request.CDB[4] = 0x00;
3362                        c->Request.CDB[5] = 0x00;
3363                        c->Request.CDB[6] = 0x00;
3364                        c->Request.CDB[7] = 0x00;
3365                        break;
3366                case  HPSA_ABORT_MSG:
3367                        a = buff;       /* point to command to be aborted */
3368                        dev_dbg(&h->pdev->dev, "Abort Tag:0x%08x:%08x using request Tag:0x%08x:%08x\n",
3369                                a->Header.Tag.upper, a->Header.Tag.lower,
3370                                c->Header.Tag.upper, c->Header.Tag.lower);
3371                        c->Request.CDBLen = 16;
3372                        c->Request.Type.Type = TYPE_MSG;
3373                        c->Request.Type.Attribute = ATTR_SIMPLE;
3374                        c->Request.Type.Direction = XFER_WRITE;
3375                        c->Request.Timeout = 0; /* Don't time out */
3376                        c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
3377                        c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
3378                        c->Request.CDB[2] = 0x00; /* reserved */
3379                        c->Request.CDB[3] = 0x00; /* reserved */
3380                        /* Tag to abort goes in CDB[4]-CDB[11] */
3381                        c->Request.CDB[4] = a->Header.Tag.lower & 0xFF;
3382                        c->Request.CDB[5] = (a->Header.Tag.lower >> 8) & 0xFF;
3383                        c->Request.CDB[6] = (a->Header.Tag.lower >> 16) & 0xFF;
3384                        c->Request.CDB[7] = (a->Header.Tag.lower >> 24) & 0xFF;
3385                        c->Request.CDB[8] = a->Header.Tag.upper & 0xFF;
3386                        c->Request.CDB[9] = (a->Header.Tag.upper >> 8) & 0xFF;
3387                        c->Request.CDB[10] = (a->Header.Tag.upper >> 16) & 0xFF;
3388                        c->Request.CDB[11] = (a->Header.Tag.upper >> 24) & 0xFF;
3389                        c->Request.CDB[12] = 0x00; /* reserved */
3390                        c->Request.CDB[13] = 0x00; /* reserved */
3391                        c->Request.CDB[14] = 0x00; /* reserved */
3392                        c->Request.CDB[15] = 0x00; /* reserved */
3393                break;
3394                default:
3395                        dev_warn(&h->pdev->dev, "unknown message type %d\n",
3396                                cmd);
3397                        BUG();
3398                }
3399        } else {
3400                dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
3401                BUG();
3402        }
3403
3404        switch (c->Request.Type.Direction) {
3405        case XFER_READ:
3406                pci_dir = PCI_DMA_FROMDEVICE;
3407                break;
3408        case XFER_WRITE:
3409                pci_dir = PCI_DMA_TODEVICE;
3410                break;
3411        case XFER_NONE:
3412                pci_dir = PCI_DMA_NONE;
3413                break;
3414        default:
3415                pci_dir = PCI_DMA_BIDIRECTIONAL;
3416        }
3417        if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
3418                return -1;
3419        return 0;
3420}
3421
3422/*
3423 * Map (physical) PCI mem into (virtual) kernel space
3424 */
3425static void __iomem *remap_pci_mem(ulong base, ulong size)
3426{
3427        ulong page_base = ((ulong) base) & PAGE_MASK;
3428        ulong page_offs = ((ulong) base) - page_base;
3429        void __iomem *page_remapped = ioremap_nocache(page_base,
3430                page_offs + size);
3431
3432        return page_remapped ? (page_remapped + page_offs) : NULL;
3433}
3434
3435/* Takes cmds off the submission queue and sends them to the hardware,
3436 * then puts them on the queue of cmds waiting for completion.
3437 */
3438static void start_io(struct ctlr_info *h)
3439{
3440        struct CommandList *c;
3441        unsigned long flags;
3442
3443        spin_lock_irqsave(&h->lock, flags);
3444        while (!list_empty(&h->reqQ)) {
3445                c = list_entry(h->reqQ.next, struct CommandList, list);
3446                /* can't do anything if fifo is full */
3447                if ((h->access.fifo_full(h))) {
3448                        dev_warn(&h->pdev->dev, "fifo full\n");
3449                        break;
3450                }
3451
3452                /* Get the first entry from the Request Q */
3453                removeQ(c);
3454                h->Qdepth--;
3455
3456                /* Put job onto the completed Q */
3457                addQ(&h->cmpQ, c);
3458
3459                /* Must increment commands_outstanding before unlocking
3460                 * and submitting to avoid race checking for fifo full
3461                 * condition.
3462                 */
3463                h->commands_outstanding++;
3464                if (h->commands_outstanding > h->max_outstanding)
3465                        h->max_outstanding = h->commands_outstanding;
3466
3467                /* Tell the controller execute command */
3468                spin_unlock_irqrestore(&h->lock, flags);
3469                h->access.submit_command(h, c);
3470                spin_lock_irqsave(&h->lock, flags);
3471        }
3472        spin_unlock_irqrestore(&h->lock, flags);
3473}
3474
3475static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
3476{
3477        return h->access.command_completed(h, q);
3478}
3479
3480static inline bool interrupt_pending(struct ctlr_info *h)
3481{
3482        return h->access.intr_pending(h);
3483}
3484
3485static inline long interrupt_not_for_us(struct ctlr_info *h)
3486{
3487        return (h->access.intr_pending(h) == 0) ||
3488                (h->interrupts_enabled == 0);
3489}
3490
3491static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
3492        u32 raw_tag)
3493{
3494        if (unlikely(tag_index >= h->nr_cmds)) {
3495                dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3496                return 1;
3497        }
3498        return 0;
3499}
3500
3501static inline void finish_cmd(struct CommandList *c)
3502{
3503        unsigned long flags;
3504
3505        spin_lock_irqsave(&c->h->lock, flags);
3506        removeQ(c);
3507        spin_unlock_irqrestore(&c->h->lock, flags);
3508        dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
3509        if (likely(c->cmd_type == CMD_SCSI))
3510                complete_scsi_command(c);
3511        else if (c->cmd_type == CMD_IOCTL_PEND)
3512                complete(c->waiting);
3513}
3514
3515static inline u32 hpsa_tag_contains_index(u32 tag)
3516{
3517        return tag & DIRECT_LOOKUP_BIT;
3518}
3519
3520static inline u32 hpsa_tag_to_index(u32 tag)
3521{
3522        return tag >> DIRECT_LOOKUP_SHIFT;
3523}
3524
3525
3526static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3527{
3528#define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3529#define HPSA_SIMPLE_ERROR_BITS 0x03
3530        if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3531                return tag & ~HPSA_SIMPLE_ERROR_BITS;
3532        return tag & ~HPSA_PERF_ERROR_BITS;
3533}
3534
3535/* process completion of an indexed ("direct lookup") command */
3536static inline void process_indexed_cmd(struct ctlr_info *h,
3537        u32 raw_tag)
3538{
3539        u32 tag_index;
3540        struct CommandList *c;
3541
3542        tag_index = hpsa_tag_to_index(raw_tag);
3543        if (!bad_tag(h, tag_index, raw_tag)) {
3544                c = h->cmd_pool + tag_index;
3545                finish_cmd(c);
3546        }
3547}
3548
3549/* process completion of a non-indexed command */
3550static inline void process_nonindexed_cmd(struct ctlr_info *h,
3551        u32 raw_tag)
3552{
3553        u32 tag;
3554        struct CommandList *c = NULL;
3555        unsigned long flags;
3556
3557        tag = hpsa_tag_discard_error_bits(h, raw_tag);
3558        spin_lock_irqsave(&h->lock, flags);
3559        list_for_each_entry(c, &h->cmpQ, list) {
3560                if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3561                        spin_unlock_irqrestore(&h->lock, flags);
3562                        finish_cmd(c);
3563                        return;
3564                }
3565        }
3566        spin_unlock_irqrestore(&h->lock, flags);
3567        bad_tag(h, h->nr_cmds + 1, raw_tag);
3568}
3569
3570/* Some controllers, like p400, will give us one interrupt
3571 * after a soft reset, even if we turned interrupts off.
3572 * Only need to check for this in the hpsa_xxx_discard_completions
3573 * functions.
3574 */
3575static int ignore_bogus_interrupt(struct ctlr_info *h)
3576{
3577        if (likely(!reset_devices))
3578                return 0;
3579
3580        if (likely(h->interrupts_enabled))
3581                return 0;
3582
3583        dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3584                "(known firmware bug.)  Ignoring.\n");
3585
3586        return 1;
3587}
3588
3589/*
3590 * Convert &h->q[x] (passed to interrupt handlers) back to h.
3591 * Relies on (h-q[x] == x) being true for x such that
3592 * 0 <= x < MAX_REPLY_QUEUES.
3593 */
3594static struct ctlr_info *queue_to_hba(u8 *queue)
3595{
3596        return container_of((queue - *queue), struct ctlr_info, q[0]);
3597}
3598
3599static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
3600{
3601        struct ctlr_info *h = queue_to_hba(queue);
3602        u8 q = *(u8 *) queue;
3603        u32 raw_tag;
3604
3605        if (ignore_bogus_interrupt(h))
3606                return IRQ_NONE;
3607
3608        if (interrupt_not_for_us(h))
3609                return IRQ_NONE;
3610        h->last_intr_timestamp = get_jiffies_64();
3611        while (interrupt_pending(h)) {
3612                raw_tag = get_next_completion(h, q);
3613                while (raw_tag != FIFO_EMPTY)
3614                        raw_tag = next_command(h, q);
3615        }
3616        return IRQ_HANDLED;
3617}
3618
3619static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
3620{
3621        struct ctlr_info *h = queue_to_hba(queue);
3622        u32 raw_tag;
3623        u8 q = *(u8 *) queue;
3624
3625        if (ignore_bogus_interrupt(h))
3626                return IRQ_NONE;
3627
3628        h->last_intr_timestamp = get_jiffies_64();
3629        raw_tag = get_next_completion(h, q);
3630        while (raw_tag != FIFO_EMPTY)
3631                raw_tag = next_command(h, q);
3632        return IRQ_HANDLED;
3633}
3634
3635static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
3636{
3637        struct ctlr_info *h = queue_to_hba((u8 *) queue);
3638        u32 raw_tag;
3639        u8 q = *(u8 *) queue;
3640
3641        if (interrupt_not_for_us(h))
3642                return IRQ_NONE;
3643        h->last_intr_timestamp = get_jiffies_64();
3644        while (interrupt_pending(h)) {
3645                raw_tag = get_next_completion(h, q);
3646                while (raw_tag != FIFO_EMPTY) {
3647                        if (likely(hpsa_tag_contains_index(raw_tag)))
3648                                process_indexed_cmd(h, raw_tag);
3649                        else
3650                                process_nonindexed_cmd(h, raw_tag);
3651                        raw_tag = next_command(h, q);
3652                }
3653        }
3654        return IRQ_HANDLED;
3655}
3656
3657static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
3658{
3659        struct ctlr_info *h = queue_to_hba(queue);
3660        u32 raw_tag;
3661        u8 q = *(u8 *) queue;
3662
3663        h->last_intr_timestamp = get_jiffies_64();
3664        raw_tag = get_next_completion(h, q);
3665        while (raw_tag != FIFO_EMPTY) {
3666                if (likely(hpsa_tag_contains_index(raw_tag)))
3667                        process_indexed_cmd(h, raw_tag);
3668                else
3669                        process_nonindexed_cmd(h, raw_tag);
3670                raw_tag = next_command(h, q);
3671        }
3672        return IRQ_HANDLED;
3673}
3674
3675/* Send a message CDB to the firmware. Careful, this only works
3676 * in simple mode, not performant mode due to the tag lookup.
3677 * We only ever use this immediately after a controller reset.
3678 */
3679static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
3680                        unsigned char type)
3681{
3682        struct Command {
3683                struct CommandListHeader CommandHeader;
3684                struct RequestBlock Request;
3685                struct ErrDescriptor ErrorDescriptor;
3686        };
3687        struct Command *cmd;
3688        static const size_t cmd_sz = sizeof(*cmd) +
3689                                        sizeof(cmd->ErrorDescriptor);
3690        dma_addr_t paddr64;
3691        uint32_t paddr32, tag;
3692        void __iomem *vaddr;
3693        int i, err;
3694
3695        vaddr = pci_ioremap_bar(pdev, 0);
3696        if (vaddr == NULL)
3697                return -ENOMEM;
3698
3699        /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3700         * CCISS commands, so they must be allocated from the lower 4GiB of
3701         * memory.
3702         */
3703        err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3704        if (err) {
3705                iounmap(vaddr);
3706                return -ENOMEM;
3707        }
3708
3709        cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3710        if (cmd == NULL) {
3711                iounmap(vaddr);
3712                return -ENOMEM;
3713        }
3714
3715        /* This must fit, because of the 32-bit consistent DMA mask.  Also,
3716         * although there's no guarantee, we assume that the address is at
3717         * least 4-byte aligned (most likely, it's page-aligned).
3718         */
3719        paddr32 = paddr64;
3720
3721        cmd->CommandHeader.ReplyQueue = 0;
3722        cmd->CommandHeader.SGList = 0;
3723        cmd->CommandHeader.SGTotal = 0;
3724        cmd->CommandHeader.Tag.lower = paddr32;
3725        cmd->CommandHeader.Tag.upper = 0;
3726        memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3727
3728        cmd->Request.CDBLen = 16;
3729        cmd->Request.Type.Type = TYPE_MSG;
3730        cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3731        cmd->Request.Type.Direction = XFER_NONE;
3732        cmd->Request.Timeout = 0; /* Don't time out */
3733        cmd->Request.CDB[0] = opcode;
3734        cmd->Request.CDB[1] = type;
3735        memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3736        cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3737        cmd->ErrorDescriptor.Addr.upper = 0;
3738        cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3739
3740        writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3741
3742        for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3743                tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3744                if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3745                        break;
3746                msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3747        }
3748
3749        iounmap(vaddr);
3750
3751        /* we leak the DMA buffer here ... no choice since the controller could
3752         *  still complete the command.
3753         */
3754        if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3755                dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3756                        opcode, type);
3757                return -ETIMEDOUT;
3758        }
3759
3760        pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3761
3762        if (tag & HPSA_ERROR_BIT) {
3763                dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3764                        opcode, type);
3765                return -EIO;
3766        }
3767
3768        dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3769                opcode, type);
3770        return 0;
3771}
3772
3773#define hpsa_noop(p) hpsa_message(p, 3, 0)
3774
3775static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3776        void * __iomem vaddr, u32 use_doorbell)
3777{
3778        u16 pmcsr;
3779        int pos;
3780
3781        if (use_doorbell) {
3782                /* For everything after the P600, the PCI power state method
3783                 * of resetting the controller doesn't work, so we have this
3784                 * other way using the doorbell register.
3785                 */
3786                dev_info(&pdev->dev, "using doorbell to reset controller\n");
3787                writel(use_doorbell, vaddr + SA5_DOORBELL);
3788        } else { /* Try to do it the PCI power state way */
3789
3790                /* Quoting from the Open CISS Specification: "The Power
3791                 * Management Control/Status Register (CSR) controls the power
3792                 * state of the device.  The normal operating state is D0,
3793                 * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3794                 * the controller, place the interface device in D3 then to D0,
3795                 * this causes a secondary PCI reset which will reset the
3796                 * controller." */
3797
3798                pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3799                if (pos == 0) {
3800                        dev_err(&pdev->dev,
3801                                "hpsa_reset_controller: "
3802                                "PCI PM not supported\n");
3803                        return -ENODEV;
3804                }
3805                dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3806                /* enter the D3hot power management state */
3807                pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3808                pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3809                pmcsr |= PCI_D3hot;
3810                pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3811
3812                msleep(500);
3813
3814                /* enter the D0 power management state */
3815                pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3816                pmcsr |= PCI_D0;
3817                pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3818
3819                /*
3820                 * The P600 requires a small delay when changing states.
3821                 * Otherwise we may think the board did not reset and we bail.
3822                 * This for kdump only and is particular to the P600.
3823                 */
3824                msleep(500);
3825        }
3826        return 0;
3827}
3828
3829static void init_driver_version(char *driver_version, int len)
3830{
3831        memset(driver_version, 0, len);
3832        strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
3833}
3834
3835static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
3836{
3837        char *driver_version;
3838        int i, size = sizeof(cfgtable->driver_version);
3839
3840        driver_version = kmalloc(size, GFP_KERNEL);
3841        if (!driver_version)
3842                return -ENOMEM;
3843
3844        init_driver_version(driver_version, size);
3845        for (i = 0; i < size; i++)
3846                writeb(driver_version[i], &cfgtable->driver_version[i]);
3847        kfree(driver_version);
3848        return 0;
3849}
3850
3851static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
3852                                          unsigned char *driver_ver)
3853{
3854        int i;
3855
3856        for (i = 0; i < sizeof(cfgtable->driver_version); i++)
3857                driver_ver[i] = readb(&cfgtable->driver_version[i]);
3858}
3859
3860static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
3861{
3862
3863        char *driver_ver, *old_driver_ver;
3864        int rc, size = sizeof(cfgtable->driver_version);
3865
3866        old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
3867        if (!old_driver_ver)
3868                return -ENOMEM;
3869        driver_ver = old_driver_ver + size;
3870
3871        /* After a reset, the 32 bytes of "driver version" in the cfgtable
3872         * should have been changed, otherwise we know the reset failed.
3873         */
3874        init_driver_version(old_driver_ver, size);
3875        read_driver_ver_from_cfgtable(cfgtable, driver_ver);
3876        rc = !memcmp(driver_ver, old_driver_ver, size);
3877        kfree(old_driver_ver);
3878        return rc;
3879}
3880/* This does a hard reset of the controller using PCI power management
3881 * states or the using the doorbell register.
3882 */
3883static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3884{
3885        u64 cfg_offset;
3886        u32 cfg_base_addr;
3887        u64 cfg_base_addr_index;
3888        void __iomem *vaddr;
3889        unsigned long paddr;
3890        u32 misc_fw_support;
3891        int rc;
3892        struct CfgTable __iomem *cfgtable;
3893        u32 use_doorbell;
3894        u32 board_id;
3895        u16 command_register;
3896
3897        /* For controllers as old as the P600, this is very nearly
3898         * the same thing as
3899         *
3900         * pci_save_state(pci_dev);
3901         * pci_set_power_state(pci_dev, PCI_D3hot);
3902         * pci_set_power_state(pci_dev, PCI_D0);
3903         * pci_restore_state(pci_dev);
3904         *
3905         * For controllers newer than the P600, the pci power state
3906         * method of resetting doesn't work so we have another way
3907         * using the doorbell register.
3908         */
3909
3910        rc = hpsa_lookup_board_id(pdev, &board_id);
3911        if (rc < 0 || !ctlr_is_resettable(board_id)) {
3912                dev_warn(&pdev->dev, "Not resetting device.\n");
3913                return -ENODEV;
3914        }
3915
3916        /* if controller is soft- but not hard resettable... */
3917        if (!ctlr_is_hard_resettable(board_id))
3918                return -ENOTSUPP; /* try soft reset later. */
3919
3920        /* Save the PCI command register */
3921        pci_read_config_word(pdev, 4, &command_register);
3922        /* Turn the board off.  This is so that later pci_restore_state()
3923         * won't turn the board on before the rest of config space is ready.
3924         */
3925        pci_disable_device(pdev);
3926        pci_save_state(pdev);
3927
3928        /* find the first memory BAR, so we can find the cfg table */
3929        rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3930        if (rc)
3931                return rc;
3932        vaddr = remap_pci_mem(paddr, 0x250);
3933        if (!vaddr)
3934                return -ENOMEM;
3935
3936        /* find cfgtable in order to check if reset via doorbell is supported */
3937        rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3938                                        &cfg_base_addr_index, &cfg_offset);
3939        if (rc)
3940                goto unmap_vaddr;
3941        cfgtable = remap_pci_mem(pci_resource_start(pdev,
3942                       cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3943        if (!cfgtable) {
3944                rc = -ENOMEM;
3945                goto unmap_vaddr;
3946        }
3947        rc = write_driver_ver_to_cfgtable(cfgtable);
3948        if (rc)
3949                goto unmap_vaddr;
3950
3951        /* If reset via doorbell register is supported, use that.
3952         * There are two such methods.  Favor the newest method.
3953         */
3954        misc_fw_support = readl(&cfgtable->misc_fw_support);
3955        use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
3956        if (use_doorbell) {
3957                use_doorbell = DOORBELL_CTLR_RESET2;
3958        } else {
3959                use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3960                if (use_doorbell) {
3961                        dev_warn(&pdev->dev, "Soft reset not supported. "
3962                                "Firmware update is required.\n");
3963                        rc = -ENOTSUPP; /* try soft reset */
3964                        goto unmap_cfgtable;
3965                }
3966        }
3967
3968        rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3969        if (rc)
3970                goto unmap_cfgtable;
3971
3972        pci_restore_state(pdev);
3973        rc = pci_enable_device(pdev);
3974        if (rc) {
3975                dev_warn(&pdev->dev, "failed to enable device.\n");
3976                goto unmap_cfgtable;
3977        }
3978        pci_write_config_word(pdev, 4, command_register);
3979
3980        /* Some devices (notably the HP Smart Array 5i Controller)
3981           need a little pause here */
3982        msleep(HPSA_POST_RESET_PAUSE_MSECS);
3983
3984        /* Wait for board to become not ready, then ready. */
3985        dev_info(&pdev->dev, "Waiting for board to reset.\n");
3986        rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3987        if (rc) {
3988                dev_warn(&pdev->dev,
3989                        "failed waiting for board to reset."
3990                        " Will try soft reset.\n");
3991                rc = -ENOTSUPP; /* Not expected, but try soft reset later */
3992                goto unmap_cfgtable;
3993        }
3994        rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
3995        if (rc) {
3996                dev_warn(&pdev->dev,
3997                        "failed waiting for board to become ready "
3998                        "after hard reset\n");
3999                goto unmap_cfgtable;
4000        }
4001
4002        rc = controller_reset_failed(vaddr);
4003        if (rc < 0)
4004                goto unmap_cfgtable;
4005        if (rc) {
4006                dev_warn(&pdev->dev, "Unable to successfully reset "
4007                        "controller. Will try soft reset.\n");
4008                rc = -ENOTSUPP;
4009        } else {
4010                dev_info(&pdev->dev, "board ready after hard reset.\n");
4011        }
4012
4013unmap_cfgtable:
4014        iounmap(cfgtable);
4015
4016unmap_vaddr:
4017        iounmap(vaddr);
4018        return rc;
4019}
4020
4021/*
4022 *  We cannot read the structure directly, for portability we must use
4023 *   the io functions.
4024 *   This is for debug only.
4025 */
4026static void print_cfg_table(struct device *dev, struct CfgTable *tb)
4027{
4028#ifdef HPSA_DEBUG
4029        int i;
4030        char temp_name[17];
4031
4032        dev_info(dev, "Controller Configuration information\n");
4033        dev_info(dev, "------------------------------------\n");
4034        for (i = 0; i < 4; i++)
4035                temp_name[i] = readb(&(tb->Signature[i]));
4036        temp_name[4] = '\0';
4037        dev_info(dev, "   Signature = %s\n", temp_name);
4038        dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
4039        dev_info(dev, "   Transport methods supported = 0x%x\n",
4040               readl(&(tb->TransportSupport)));
4041        dev_info(dev, "   Transport methods active = 0x%x\n",
4042               readl(&(tb->TransportActive)));
4043        dev_info(dev, "   Requested transport Method = 0x%x\n",
4044               readl(&(tb->HostWrite.TransportRequest)));
4045        dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
4046               readl(&(tb->HostWrite.CoalIntDelay)));
4047        dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
4048               readl(&(tb->HostWrite.CoalIntCount)));
4049        dev_info(dev, "   Max outstanding commands = 0x%d\n",
4050               readl(&(tb->CmdsOutMax)));
4051        dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
4052        for (i = 0; i < 16; i++)
4053                temp_name[i] = readb(&(tb->ServerName[i]));
4054        temp_name[16] = '\0';
4055        dev_info(dev, "   Server Name = %s\n", temp_name);
4056        dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
4057                readl(&(tb->HeartBeat)));
4058#endif                          /* HPSA_DEBUG */
4059}
4060
4061static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
4062{
4063        int i, offset, mem_type, bar_type;
4064
4065        if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
4066                return 0;
4067        offset = 0;
4068        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4069                bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
4070                if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
4071                        offset += 4;
4072                else {
4073                        mem_type = pci_resource_flags(pdev, i) &
4074                            PCI_BASE_ADDRESS_MEM_TYPE_MASK;
4075                        switch (mem_type) {
4076                        case PCI_BASE_ADDRESS_MEM_TYPE_32:
4077                        case PCI_BASE_ADDRESS_MEM_TYPE_1M:
4078                                offset += 4;    /* 32 bit */
4079                                break;
4080                        case PCI_BASE_ADDRESS_MEM_TYPE_64:
4081                                offset += 8;
4082                                break;
4083                        default:        /* reserved in PCI 2.2 */
4084                                dev_warn(&pdev->dev,
4085                                       "base address is invalid\n");
4086                                return -1;
4087                                break;
4088                        }
4089                }
4090                if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
4091                        return i + 1;
4092        }
4093        return -1;
4094}
4095
4096/* If MSI/MSI-X is supported by the kernel we will try to enable it on
4097 * controllers that are capable. If not, we use IO-APIC mode.
4098 */
4099
4100static void hpsa_interrupt_mode(struct ctlr_info *h)
4101{
4102#ifdef CONFIG_PCI_MSI
4103        int err, i;
4104        struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];
4105
4106        for (i = 0; i < MAX_REPLY_QUEUES; i++) {
4107                hpsa_msix_entries[i].vector = 0;
4108                hpsa_msix_entries[i].entry = i;
4109        }
4110
4111        /* Some boards advertise MSI but don't really support it */
4112        if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
4113            (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
4114                goto default_int_mode;
4115        if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
4116                dev_info(&h->pdev->dev, "MSIX\n");
4117                err = pci_enable_msix(h->pdev, hpsa_msix_entries,
4118                                                MAX_REPLY_QUEUES);
4119                if (!err) {
4120                        for (i = 0; i < MAX_REPLY_QUEUES; i++)
4121                                h->intr[i] = hpsa_msix_entries[i].vector;
4122                        h->msix_vector = 1;
4123                        return;
4124                }
4125                if (err > 0) {
4126                        dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
4127                               "available\n", err);
4128                        goto default_int_mode;
4129                } else {
4130                        dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
4131                               err);
4132                        goto default_int_mode;
4133                }
4134        }
4135        if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
4136                dev_info(&h->pdev->dev, "MSI\n");
4137                if (!pci_enable_msi(h->pdev))
4138                        h->msi_vector = 1;
4139                else
4140                        dev_warn(&h->pdev->dev, "MSI init failed\n");
4141        }
4142default_int_mode:
4143#endif                          /* CONFIG_PCI_MSI */
4144        /* if we get here we're going to use the default interrupt mode */
4145        h->intr[h->intr_mode] = h->pdev->irq;
4146}
4147
4148static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
4149{
4150        int i;
4151        u32 subsystem_vendor_id, subsystem_device_id;
4152
4153        subsystem_vendor_id = pdev->subsystem_vendor;
4154        subsystem_device_id = pdev->subsystem_device;
4155        *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4156                    subsystem_vendor_id;
4157
4158        for (i = 0; i < ARRAY_SIZE(products); i++)
4159                if (*board_id == products[i].board_id)
4160                        return i;
4161
4162        if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
4163                subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
4164                !hpsa_allow_any) {
4165                dev_warn(&pdev->dev, "unrecognized board ID: "
4166                        "0x%08x, ignoring.\n", *board_id);
4167                        return -ENODEV;
4168        }
4169        return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
4170}
4171
4172static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
4173                                    unsigned long *memory_bar)
4174{
4175        int i;
4176
4177        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4178                if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4179                        /* addressing mode bits already removed */
4180                        *memory_bar = pci_resource_start(pdev, i);
4181                        dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4182                                *memory_bar);
4183                        return 0;
4184                }
4185        dev_warn(&pdev->dev, "no memory BAR found\n");
4186        return -ENODEV;
4187}
4188
4189static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
4190                                     int wait_for_ready)
4191{
4192        int i, iterations;
4193        u32 scratchpad;
4194        if (wait_for_ready)
4195                iterations = HPSA_BOARD_READY_ITERATIONS;
4196        else
4197                iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
4198
4199        for (i = 0; i < iterations; i++) {
4200                scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
4201                if (wait_for_ready) {
4202                        if (scratchpad == HPSA_FIRMWARE_READY)
4203                                return 0;
4204                } else {
4205                        if (scratchpad != HPSA_FIRMWARE_READY)
4206                                return 0;
4207                }
4208                msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
4209        }
4210        dev_warn(&pdev->dev, "board not ready, timed out.\n");
4211        return -ENODEV;
4212}
4213
4214static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
4215                               u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4216                               u64 *cfg_offset)
4217{
4218        *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4219        *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4220        *cfg_base_addr &= (u32) 0x0000ffff;
4221        *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4222        if (*cfg_base_addr_index == -1) {
4223                dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
4224                return -ENODEV;
4225        }
4226        return 0;
4227}
4228
4229static int hpsa_find_cfgtables(struct ctlr_info *h)
4230{
4231        u64 cfg_offset;
4232        u32 cfg_base_addr;
4233        u64 cfg_base_addr_index;
4234        u32 trans_offset;
4235        int rc;
4236
4237        rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4238                &cfg_base_addr_index, &cfg_offset);
4239        if (rc)
4240                return rc;
4241        h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
4242                       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
4243        if (!h->cfgtable)
4244                return -ENOMEM;
4245        rc = write_driver_ver_to_cfgtable(h->cfgtable);
4246        if (rc)
4247                return rc;
4248        /* Find performant mode table. */
4249        trans_offset = readl(&h->cfgtable->TransMethodOffset);
4250        h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4251                                cfg_base_addr_index)+cfg_offset+trans_offset,
4252                                sizeof(*h->transtable));
4253        if (!h->transtable)
4254                return -ENOMEM;
4255        return 0;
4256}
4257
4258static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
4259{
4260        h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
4261
4262        /* Limit commands in memory limited kdump scenario. */
4263        if (reset_devices && h->max_commands > 32)
4264                h->max_commands = 32;
4265
4266        if (h->max_commands < 16) {
4267                dev_warn(&h->pdev->dev, "Controller reports "
4268                        "max supported commands of %d, an obvious lie. "
4269                        "Using 16.  Ensure that firmware is up to date.\n",
4270                        h->max_commands);
4271                h->max_commands = 16;
4272        }
4273}
4274
4275/* Interrogate the hardware for some limits:
4276 * max commands, max SG elements without chaining, and with chaining,
4277 * SG chain block size, etc.
4278 */
4279static void hpsa_find_board_params(struct ctlr_info *h)
4280{
4281        hpsa_get_max_perf_mode_cmds(h);
4282        h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
4283        h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
4284        /*
4285         * Limit in-command s/g elements to 32 save dma'able memory.
4286         * Howvever spec says if 0, use 31
4287         */
4288        h->max_cmd_sg_entries = 31;
4289        if (h->maxsgentries > 512) {
4290                h->max_cmd_sg_entries = 32;
4291                h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
4292                h->maxsgentries--; /* save one for chain pointer */
4293        } else {
4294                h->maxsgentries = 31; /* default to traditional values */
4295                h->chainsize = 0;
4296        }
4297
4298        /* Find out what task management functions are supported and cache */
4299        h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
4300}
4301
4302static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
4303{
4304        if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
4305                dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4306                return false;
4307        }
4308        return true;
4309}
4310
4311/* Need to enable prefetch in the SCSI core for 6400 in x86 */
4312static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
4313{
4314#ifdef CONFIG_X86
4315        u32 prefetch;
4316
4317        prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4318        prefetch |= 0x100;
4319        writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
4320#endif
4321}
4322
4323/* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
4324 * in a prefetch beyond physical memory.
4325 */
4326static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
4327{
4328        u32 dma_prefetch;
4329
4330        if (h->board_id != 0x3225103C)
4331                return;
4332        dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4333        dma_prefetch |= 0x8000;
4334        writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4335}
4336
4337static void hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
4338{
4339        int i;
4340        u32 doorbell_value;
4341        unsigned long flags;
4342
4343        /* under certain very rare conditions, this can take awhile.
4344         * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
4345         * as we enter this code.)
4346         */
4347        for (i = 0; i < MAX_CONFIG_WAIT; i++) {
4348                spin_lock_irqsave(&h->lock, flags);
4349                doorbell_value = readl(h->vaddr + SA5_DOORBELL);
4350                spin_unlock_irqrestore(&h->lock, flags);
4351                if (!(doorbell_value & CFGTBL_ChangeReq))
4352                        break;
4353                /* delay and try again */
4354                usleep_range(10000, 20000);
4355        }
4356}
4357
4358static int hpsa_enter_simple_mode(struct ctlr_info *h)
4359{
4360        u32 trans_support;
4361
4362        trans_support = readl(&(h->cfgtable->TransportSupport));
4363        if (!(trans_support & SIMPLE_MODE))
4364                return -ENOTSUPP;
4365
4366        h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
4367        /* Update the field, and then ring the doorbell */
4368        writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
4369        writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4370        hpsa_wait_for_mode_change_ack(h);
4371        print_cfg_table(&h->pdev->dev, h->cfgtable);
4372        if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
4373                dev_warn(&h->pdev->dev,
4374                        "unable to get board into simple mode\n");
4375                return -ENODEV;
4376        }
4377        h->transMethod = CFGTBL_Trans_Simple;
4378        return 0;
4379}
4380
4381static int hpsa_pci_init(struct ctlr_info *h)
4382{
4383        int prod_index, err;
4384
4385        prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
4386        if (prod_index < 0)
4387                return -ENODEV;
4388        h->product_name = products[prod_index].product_name;
4389        h->access = *(products[prod_index].access);
4390
4391        pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
4392                               PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
4393
4394        err = pci_enable_device(h->pdev);
4395        if (err) {
4396                dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
4397                return err;
4398        }
4399
4400        /* Enable bus mastering (pci_disable_device may disable this) */
4401        pci_set_master(h->pdev);
4402
4403        err = pci_request_regions(h->pdev, HPSA);
4404        if (err) {
4405                dev_err(&h->pdev->dev,
4406                        "cannot obtain PCI resources, aborting\n");
4407                return err;
4408        }
4409        hpsa_interrupt_mode(h);
4410        err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
4411        if (err)
4412                goto err_out_free_res;
4413        h->vaddr = remap_pci_mem(h->paddr, 0x250);
4414        if (!h->vaddr) {
4415                err = -ENOMEM;
4416                goto err_out_free_res;
4417        }
4418        err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
4419        if (err)
4420                goto err_out_free_res;
4421        err = hpsa_find_cfgtables(h);
4422        if (err)
4423                goto err_out_free_res;
4424        hpsa_find_board_params(h);
4425
4426        if (!hpsa_CISS_signature_present(h)) {
4427                err = -ENODEV;
4428                goto err_out_free_res;
4429        }
4430        hpsa_enable_scsi_prefetch(h);
4431        hpsa_p600_dma_prefetch_quirk(h);
4432        err = hpsa_enter_simple_mode(h);
4433        if (err)
4434                goto err_out_free_res;
4435        return 0;
4436
4437err_out_free_res:
4438        if (h->transtable)
4439                iounmap(h->transtable);
4440        if (h->cfgtable)
4441                iounmap(h->cfgtable);
4442        if (h->vaddr)
4443                iounmap(h->vaddr);
4444        pci_disable_device(h->pdev);
4445        pci_release_regions(h->pdev);
4446        return err;
4447}
4448
4449static void hpsa_hba_inquiry(struct ctlr_info *h)
4450{
4451        int rc;
4452
4453#define HBA_INQUIRY_BYTE_COUNT 64
4454        h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
4455        if (!h->hba_inquiry_data)
4456                return;
4457        rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
4458                h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
4459        if (rc != 0) {
4460                kfree(h->hba_inquiry_data);
4461                h->hba_inquiry_data = NULL;
4462        }
4463}
4464
4465static int hpsa_init_reset_devices(struct pci_dev *pdev)
4466{
4467        int rc, i;
4468
4469        if (!reset_devices)
4470                return 0;
4471
4472        /* Reset the controller with a PCI power-cycle or via doorbell */
4473        rc = hpsa_kdump_hard_reset_controller(pdev);
4474
4475        /* -ENOTSUPP here means we cannot reset the controller
4476         * but it's already (and still) up and running in
4477         * "performant mode".  Or, it might be 640x, which can't reset
4478         * due to concerns about shared bbwc between 6402/6404 pair.
4479         */
4480        if (rc == -ENOTSUPP)
4481                return rc; /* just try to do the kdump anyhow. */
4482        if (rc)
4483                return -ENODEV;
4484
4485        /* Now try to get the controller to respond to a no-op */
4486        dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
4487        for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
4488                if (hpsa_noop(pdev) == 0)
4489                        break;
4490                else
4491                        dev_warn(&pdev->dev, "no-op failed%s\n",
4492                                        (i < 11 ? "; re-trying" : ""));
4493        }
4494        return 0;
4495}
4496
4497static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
4498{
4499        h->cmd_pool_bits = kzalloc(
4500                DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
4501                sizeof(unsigned long), GFP_KERNEL);
4502        h->cmd_pool = pci_alloc_consistent(h->pdev,
4503                    h->nr_cmds * sizeof(*h->cmd_pool),
4504                    &(h->cmd_pool_dhandle));
4505        h->errinfo_pool = pci_alloc_consistent(h->pdev,
4506                    h->nr_cmds * sizeof(*h->errinfo_pool),
4507                    &(h->errinfo_pool_dhandle));
4508        if ((h->cmd_pool_bits == NULL)
4509            || (h->cmd_pool == NULL)
4510            || (h->errinfo_pool == NULL)) {
4511                dev_err(&h->pdev->dev, "out of memory in %s", __func__);
4512                return -ENOMEM;
4513        }
4514        return 0;
4515}
4516
4517static void hpsa_free_cmd_pool(struct ctlr_info *h)
4518{
4519        kfree(h->cmd_pool_bits);
4520        if (h->cmd_pool)
4521                pci_free_consistent(h->pdev,
4522                            h->nr_cmds * sizeof(struct CommandList),
4523                            h->cmd_pool, h->cmd_pool_dhandle);
4524        if (h->errinfo_pool)
4525                pci_free_consistent(h->pdev,
4526                            h->nr_cmds * sizeof(struct ErrorInfo),
4527                            h->errinfo_pool,
4528                            h->errinfo_pool_dhandle);
4529}
4530
4531static int hpsa_request_irq(struct ctlr_info *h,
4532        irqreturn_t (*msixhandler)(int, void *),
4533        irqreturn_t (*intxhandler)(int, void *))
4534{
4535        int rc, i;
4536
4537        /*
4538         * initialize h->q[x] = x so that interrupt handlers know which
4539         * queue to process.
4540         */
4541        for (i = 0; i < MAX_REPLY_QUEUES; i++)
4542                h->q[i] = (u8) i;
4543
4544        if (h->intr_mode == PERF_MODE_INT && h->msix_vector) {
4545                /* If performant mode and MSI-X, use multiple reply queues */
4546                for (i = 0; i < MAX_REPLY_QUEUES; i++)
4547                        rc = request_irq(h->intr[i], msixhandler,
4548                                        0, h->devname,
4549                                        &h->q[i]);
4550        } else {
4551                /* Use single reply pool */
4552                if (h->msix_vector || h->msi_vector) {
4553                        rc = request_irq(h->intr[h->intr_mode],
4554                                msixhandler, 0, h->devname,
4555                                &h->q[h->intr_mode]);
4556                } else {
4557                        rc = request_irq(h->intr[h->intr_mode],
4558                                intxhandler, IRQF_SHARED, h->devname,
4559                                &h->q[h->intr_mode]);
4560                }
4561        }
4562        if (rc) {
4563                dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
4564                       h->intr[h->intr_mode], h->devname);
4565                return -ENODEV;
4566        }
4567        return 0;
4568}
4569
4570static int hpsa_kdump_soft_reset(struct ctlr_info *h)
4571{
4572        if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
4573                HPSA_RESET_TYPE_CONTROLLER)) {
4574                dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4575                return -EIO;
4576        }
4577
4578        dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4579        if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4580                dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4581                return -1;
4582        }
4583
4584        dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4585        if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4586                dev_warn(&h->pdev->dev, "Board failed to become ready "
4587                        "after soft reset.\n");
4588                return -1;
4589        }
4590
4591        return 0;
4592}
4593
4594static void free_irqs(struct ctlr_info *h)
4595{
4596        int i;
4597
4598        if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
4599                /* Single reply queue, only one irq to free */
4600                i = h->intr_mode;
4601                free_irq(h->intr[i], &h->q[i]);
4602                return;
4603        }
4604
4605        for (i = 0; i < MAX_REPLY_QUEUES; i++)
4606                free_irq(h->intr[i], &h->q[i]);
4607}
4608
4609static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h)
4610{
4611        free_irqs(h);
4612#ifdef CONFIG_PCI_MSI
4613        if (h->msix_vector) {
4614                if (h->pdev->msix_enabled)
4615                        pci_disable_msix(h->pdev);
4616        } else if (h->msi_vector) {
4617                if (h->pdev->msi_enabled)
4618                        pci_disable_msi(h->pdev);
4619        }
4620#endif /* CONFIG_PCI_MSI */
4621}
4622
4623static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
4624{
4625        hpsa_free_irqs_and_disable_msix(h);
4626        hpsa_free_sg_chain_blocks(h);
4627        hpsa_free_cmd_pool(h);
4628        kfree(h->blockFetchTable);
4629        pci_free_consistent(h->pdev, h->reply_pool_size,
4630                h->reply_pool, h->reply_pool_dhandle);
4631        if (h->vaddr)
4632                iounmap(h->vaddr);
4633        if (h->transtable)
4634                iounmap(h->transtable);
4635        if (h->cfgtable)
4636                iounmap(h->cfgtable);
4637        pci_release_regions(h->pdev);
4638        kfree(h);
4639}
4640
4641static void remove_ctlr_from_lockup_detector_list(struct ctlr_info *h)
4642{
4643        assert_spin_locked(&lockup_detector_lock);
4644        if (!hpsa_lockup_detector)
4645                return;
4646        if (h->lockup_detected)
4647                return; /* already stopped the lockup detector */
4648        list_del(&h->lockup_list);
4649}
4650
4651/* Called when controller lockup detected. */
4652static void fail_all_cmds_on_list(struct ctlr_info *h, struct list_head *list)
4653{
4654        struct CommandList *c = NULL;
4655
4656        assert_spin_locked(&h->lock);
4657        /* Mark all outstanding commands as failed and complete them. */
4658        while (!list_empty(list)) {
4659                c = list_entry(list->next, struct CommandList, list);
4660                c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4661                finish_cmd(c);
4662        }
4663}
4664
4665static void controller_lockup_detected(struct ctlr_info *h)
4666{
4667        unsigned long flags;
4668
4669        assert_spin_locked(&lockup_detector_lock);
4670        remove_ctlr_from_lockup_detector_list(h);
4671        h->access.set_intr_mask(h, HPSA_INTR_OFF);
4672        spin_lock_irqsave(&h->lock, flags);
4673        h->lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
4674        spin_unlock_irqrestore(&h->lock, flags);
4675        dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x\n",
4676                        h->lockup_detected);
4677        pci_disable_device(h->pdev);
4678        spin_lock_irqsave(&h->lock, flags);
4679        fail_all_cmds_on_list(h, &h->cmpQ);
4680        fail_all_cmds_on_list(h, &h->reqQ);
4681        spin_unlock_irqrestore(&h->lock, flags);
4682}
4683
4684static void detect_controller_lockup(struct ctlr_info *h)
4685{
4686        u64 now;
4687        u32 heartbeat;
4688        unsigned long flags;
4689
4690        assert_spin_locked(&lockup_detector_lock);
4691        now = get_jiffies_64();
4692        /* If we've received an interrupt recently, we're ok. */
4693        if (time_after64(h->last_intr_timestamp +
4694                                (h->heartbeat_sample_interval), now))
4695                return;
4696
4697        /*
4698         * If we've already checked the heartbeat recently, we're ok.
4699         * This could happen if someone sends us a signal. We
4700         * otherwise don't care about signals in this thread.
4701         */
4702        if (time_after64(h->last_heartbeat_timestamp +
4703                                (h->heartbeat_sample_interval), now))
4704                return;
4705
4706        /* If heartbeat has not changed since we last looked, we're not ok. */
4707        spin_lock_irqsave(&h->lock, flags);
4708        heartbeat = readl(&h->cfgtable->HeartBeat);
4709        spin_unlock_irqrestore(&h->lock, flags);
4710        if (h->last_heartbeat == heartbeat) {
4711                controller_lockup_detected(h);
4712                return;
4713        }
4714
4715        /* We're ok. */
4716        h->last_heartbeat = heartbeat;
4717        h->last_heartbeat_timestamp = now;
4718}
4719
4720static int detect_controller_lockup_thread(void *notused)
4721{
4722        struct ctlr_info *h;
4723        unsigned long flags;
4724
4725        while (1) {
4726                struct list_head *this, *tmp;
4727
4728                schedule_timeout_interruptible(HEARTBEAT_SAMPLE_INTERVAL);
4729                if (kthread_should_stop())
4730                        break;
4731                spin_lock_irqsave(&lockup_detector_lock, flags);
4732                list_for_each_safe(this, tmp, &hpsa_ctlr_list) {
4733                        h = list_entry(this, struct ctlr_info, lockup_list);
4734                        detect_controller_lockup(h);
4735                }
4736                spin_unlock_irqrestore(&lockup_detector_lock, flags);
4737        }
4738        return 0;
4739}
4740
4741static void add_ctlr_to_lockup_detector_list(struct ctlr_info *h)
4742{
4743        unsigned long flags;
4744
4745        h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
4746        spin_lock_irqsave(&lockup_detector_lock, flags);
4747        list_add_tail(&h->lockup_list, &hpsa_ctlr_list);
4748        spin_unlock_irqrestore(&lockup_detector_lock, flags);
4749}
4750
4751static void start_controller_lockup_detector(struct ctlr_info *h)
4752{
4753        /* Start the lockup detector thread if not already started */
4754        if (!hpsa_lockup_detector) {
4755                spin_lock_init(&lockup_detector_lock);
4756                hpsa_lockup_detector =
4757                        kthread_run(detect_controller_lockup_thread,
4758                                                NULL, HPSA);
4759        }
4760        if (!hpsa_lockup_detector) {
4761                dev_warn(&h->pdev->dev,
4762                        "Could not start lockup detector thread\n");
4763                return;
4764        }
4765        add_ctlr_to_lockup_detector_list(h);
4766}
4767
4768static void stop_controller_lockup_detector(struct ctlr_info *h)
4769{
4770        unsigned long flags;
4771
4772        spin_lock_irqsave(&lockup_detector_lock, flags);
4773        remove_ctlr_from_lockup_detector_list(h);
4774        /* If the list of ctlr's to monitor is empty, stop the thread */
4775        if (list_empty(&hpsa_ctlr_list)) {
4776                spin_unlock_irqrestore(&lockup_detector_lock, flags);
4777                kthread_stop(hpsa_lockup_detector);
4778                spin_lock_irqsave(&lockup_detector_lock, flags);
4779                hpsa_lockup_detector = NULL;
4780        }
4781        spin_unlock_irqrestore(&lockup_detector_lock, flags);
4782}
4783
4784static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
4785{
4786        int dac, rc;
4787        struct ctlr_info *h;
4788        int try_soft_reset = 0;
4789        unsigned long flags;
4790
4791        if (number_of_controllers == 0)
4792                printk(KERN_INFO DRIVER_NAME "\n");
4793
4794        rc = hpsa_init_reset_devices(pdev);
4795        if (rc) {
4796                if (rc != -ENOTSUPP)
4797                        return rc;
4798                /* If the reset fails in a particular way (it has no way to do
4799                 * a proper hard reset, so returns -ENOTSUPP) we can try to do
4800                 * a soft reset once we get the controller configured up to the
4801                 * point that it can accept a command.
4802                 */
4803                try_soft_reset = 1;
4804                rc = 0;
4805        }
4806
4807reinit_after_soft_reset:
4808
4809        /* Command structures must be aligned on a 32-byte boundary because
4810         * the 5 lower bits of the address are used by the hardware. and by
4811         * the driver.  See comments in hpsa.h for more info.
4812         */
4813#define COMMANDLIST_ALIGNMENT 32
4814        BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4815        h = kzalloc(sizeof(*h), GFP_KERNEL);
4816        if (!h)
4817                return -ENOMEM;
4818
4819        h->pdev = pdev;
4820        h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4821        INIT_LIST_HEAD(&h->cmpQ);
4822        INIT_LIST_HEAD(&h->reqQ);
4823        spin_lock_init(&h->lock);
4824        spin_lock_init(&h->scan_lock);
4825        rc = hpsa_pci_init(h);
4826        if (rc != 0)
4827                goto clean1;
4828
4829        sprintf(h->devname, HPSA "%d", number_of_controllers);
4830        h->ctlr = number_of_controllers;
4831        number_of_controllers++;
4832
4833        /* configure PCI DMA stuff */
4834        rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4835        if (rc == 0) {
4836                dac = 1;
4837        } else {
4838                rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4839                if (rc == 0) {
4840                        dac = 0;
4841                } else {
4842                        dev_err(&pdev->dev, "no suitable DMA available\n");
4843                        goto clean1;
4844                }
4845        }
4846
4847        /* make sure the board interrupts are off */
4848        h->access.set_intr_mask(h, HPSA_INTR_OFF);
4849
4850        if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4851                goto clean2;
4852        dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
4853               h->devname, pdev->device,
4854               h->intr[h->intr_mode], dac ? "" : " not");
4855        if (hpsa_allocate_cmd_pool(h))
4856                goto clean4;
4857        if (hpsa_allocate_sg_chain_blocks(h))
4858                goto clean4;
4859        init_waitqueue_head(&h->scan_wait_queue);
4860        h->scan_finished = 1; /* no scan currently in progress */
4861
4862        pci_set_drvdata(pdev, h);
4863        h->ndevices = 0;
4864        h->scsi_host = NULL;
4865        spin_lock_init(&h->devlock);
4866        hpsa_put_ctlr_into_performant_mode(h);
4867
4868        /* At this point, the controller is ready to take commands.
4869         * Now, if reset_devices and the hard reset didn't work, try
4870         * the soft reset and see if that works.
4871         */
4872        if (try_soft_reset) {
4873
4874                /* This is kind of gross.  We may or may not get a completion
4875                 * from the soft reset command, and if we do, then the value
4876                 * from the fifo may or may not be valid.  So, we wait 10 secs
4877                 * after the reset throwing away any completions we get during
4878                 * that time.  Unregister the interrupt handler and register
4879                 * fake ones to scoop up any residual completions.
4880                 */
4881                spin_lock_irqsave(&h->lock, flags);
4882                h->access.set_intr_mask(h, HPSA_INTR_OFF);
4883                spin_unlock_irqrestore(&h->lock, flags);
4884                free_irqs(h);
4885                rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
4886                                        hpsa_intx_discard_completions);
4887                if (rc) {
4888                        dev_warn(&h->pdev->dev, "Failed to request_irq after "
4889                                "soft reset.\n");
4890                        goto clean4;
4891                }
4892
4893                rc = hpsa_kdump_soft_reset(h);
4894                if (rc)
4895                        /* Neither hard nor soft reset worked, we're hosed. */
4896                        goto clean4;
4897
4898                dev_info(&h->pdev->dev, "Board READY.\n");
4899                dev_info(&h->pdev->dev,
4900                        "Waiting for stale completions to drain.\n");
4901                h->access.set_intr_mask(h, HPSA_INTR_ON);
4902                msleep(10000);
4903                h->access.set_intr_mask(h, HPSA_INTR_OFF);
4904
4905                rc = controller_reset_failed(h->cfgtable);
4906                if (rc)
4907                        dev_info(&h->pdev->dev,
4908                                "Soft reset appears to have failed.\n");
4909
4910                /* since the controller's reset, we have to go back and re-init
4911                 * everything.  Easiest to just forget what we've done and do it
4912                 * all over again.
4913                 */
4914                hpsa_undo_allocations_after_kdump_soft_reset(h);
4915                try_soft_reset = 0;
4916                if (rc)
4917                        /* don't go to clean4, we already unallocated */
4918                        return -ENODEV;
4919
4920                goto reinit_after_soft_reset;
4921        }
4922
4923        /* Turn the interrupts on so we can service requests */
4924        h->access.set_intr_mask(h, HPSA_INTR_ON);
4925
4926        hpsa_hba_inquiry(h);
4927        hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
4928        start_controller_lockup_detector(h);
4929        return 1;
4930
4931clean4:
4932        hpsa_free_sg_chain_blocks(h);
4933        hpsa_free_cmd_pool(h);
4934        free_irqs(h);
4935clean2:
4936clean1:
4937        kfree(h);
4938        return rc;
4939}
4940
4941static void hpsa_flush_cache(struct ctlr_info *h)
4942{
4943        char *flush_buf;
4944        struct CommandList *c;
4945
4946        flush_buf = kzalloc(4, GFP_KERNEL);
4947        if (!flush_buf)
4948                return;
4949
4950        c = cmd_special_alloc(h);
4951        if (!c) {
4952                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
4953                goto out_of_memory;
4954        }
4955        if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
4956                RAID_CTLR_LUNID, TYPE_CMD)) {
4957                goto out;
4958        }
4959        hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
4960        if (c->err_info->CommandStatus != 0)
4961out:
4962                dev_warn(&h->pdev->dev,
4963                        "error flushing cache on controller\n");
4964        cmd_special_free(h, c);
4965out_of_memory:
4966        kfree(flush_buf);
4967}
4968
4969static void hpsa_shutdown(struct pci_dev *pdev)
4970{
4971        struct ctlr_info *h;
4972
4973        h = pci_get_drvdata(pdev);
4974        /* Turn board interrupts off  and send the flush cache command
4975         * sendcmd will turn off interrupt, and send the flush...
4976         * To write all data in the battery backed cache to disks
4977         */
4978        hpsa_flush_cache(h);
4979        h->access.set_intr_mask(h, HPSA_INTR_OFF);
4980        hpsa_free_irqs_and_disable_msix(h);
4981}
4982
4983static void hpsa_free_device_info(struct ctlr_info *h)
4984{
4985        int i;
4986
4987        for (i = 0; i < h->ndevices; i++)
4988                kfree(h->dev[i]);
4989}
4990
4991static void hpsa_remove_one(struct pci_dev *pdev)
4992{
4993        struct ctlr_info *h;
4994
4995        if (pci_get_drvdata(pdev) == NULL) {
4996                dev_err(&pdev->dev, "unable to remove device\n");
4997                return;
4998        }
4999        h = pci_get_drvdata(pdev);
5000        stop_controller_lockup_detector(h);
5001        hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
5002        hpsa_shutdown(pdev);
5003        iounmap(h->vaddr);
5004        iounmap(h->transtable);
5005        iounmap(h->cfgtable);
5006        hpsa_free_device_info(h);
5007        hpsa_free_sg_chain_blocks(h);
5008        pci_free_consistent(h->pdev,
5009                h->nr_cmds * sizeof(struct CommandList),
5010                h->cmd_pool, h->cmd_pool_dhandle);
5011        pci_free_consistent(h->pdev,
5012                h->nr_cmds * sizeof(struct ErrorInfo),
5013                h->errinfo_pool, h->errinfo_pool_dhandle);
5014        pci_free_consistent(h->pdev, h->reply_pool_size,
5015                h->reply_pool, h->reply_pool_dhandle);
5016        kfree(h->cmd_pool_bits);
5017        kfree(h->blockFetchTable);
5018        kfree(h->hba_inquiry_data);
5019        pci_disable_device(pdev);
5020        pci_release_regions(pdev);
5021        pci_set_drvdata(pdev, NULL);
5022        kfree(h);
5023}
5024
5025static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
5026        __attribute__((unused)) pm_message_t state)
5027{
5028        return -ENOSYS;
5029}
5030
5031static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
5032{
5033        return -ENOSYS;
5034}
5035
5036static struct pci_driver hpsa_pci_driver = {
5037        .name = HPSA,
5038        .probe = hpsa_init_one,
5039        .remove = hpsa_remove_one,
5040        .id_table = hpsa_pci_device_id, /* id_table */
5041        .shutdown = hpsa_shutdown,
5042        .suspend = hpsa_suspend,
5043        .resume = hpsa_resume,
5044};
5045
5046/* Fill in bucket_map[], given nsgs (the max number of
5047 * scatter gather elements supported) and bucket[],
5048 * which is an array of 8 integers.  The bucket[] array
5049 * contains 8 different DMA transfer sizes (in 16
5050 * byte increments) which the controller uses to fetch
5051 * commands.  This function fills in bucket_map[], which
5052 * maps a given number of scatter gather elements to one of
5053 * the 8 DMA transfer sizes.  The point of it is to allow the
5054 * controller to only do as much DMA as needed to fetch the
5055 * command, with the DMA transfer size encoded in the lower
5056 * bits of the command address.
5057 */
5058static void  calc_bucket_map(int bucket[], int num_buckets,
5059        int nsgs, int *bucket_map)
5060{
5061        int i, j, b, size;
5062
5063        /* even a command with 0 SGs requires 4 blocks */
5064#define MINIMUM_TRANSFER_BLOCKS 4
5065#define NUM_BUCKETS 8
5066        /* Note, bucket_map must have nsgs+1 entries. */
5067        for (i = 0; i <= nsgs; i++) {
5068                /* Compute size of a command with i SG entries */
5069                size = i + MINIMUM_TRANSFER_BLOCKS;
5070                b = num_buckets; /* Assume the biggest bucket */
5071                /* Find the bucket that is just big enough */
5072                for (j = 0; j < 8; j++) {
5073                        if (bucket[j] >= size) {
5074                                b = j;
5075                                break;
5076                        }