linux/drivers/scsi/hpsa.c
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   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 "2.0.2-1"
  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, 0x3354},
 100        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
 101        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 102        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1920},
 103        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
 104        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
 105        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
 106        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
 107        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1925},
 108        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
 109        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
 110        {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x334d},
 111        {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 112                PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 113        {0,}
 114};
 115
 116MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 117
 118/*  board_id = Subsystem Device ID & Vendor ID
 119 *  product = Marketing Name for the board
 120 *  access = Address of the struct of function pointers
 121 */
 122static struct board_type products[] = {
 123        {0x3241103C, "Smart Array P212", &SA5_access},
 124        {0x3243103C, "Smart Array P410", &SA5_access},
 125        {0x3245103C, "Smart Array P410i", &SA5_access},
 126        {0x3247103C, "Smart Array P411", &SA5_access},
 127        {0x3249103C, "Smart Array P812", &SA5_access},
 128        {0x324a103C, "Smart Array P712m", &SA5_access},
 129        {0x324b103C, "Smart Array P711m", &SA5_access},
 130        {0x3350103C, "Smart Array P222", &SA5_access},
 131        {0x3351103C, "Smart Array P420", &SA5_access},
 132        {0x3352103C, "Smart Array P421", &SA5_access},
 133        {0x3353103C, "Smart Array P822", &SA5_access},
 134        {0x3354103C, "Smart Array P420i", &SA5_access},
 135        {0x3355103C, "Smart Array P220i", &SA5_access},
 136        {0x3356103C, "Smart Array P721m", &SA5_access},
 137        {0x1920103C, "Smart Array", &SA5_access},
 138        {0x1921103C, "Smart Array", &SA5_access},
 139        {0x1922103C, "Smart Array", &SA5_access},
 140        {0x1923103C, "Smart Array", &SA5_access},
 141        {0x1924103C, "Smart Array", &SA5_access},
 142        {0x1925103C, "Smart Array", &SA5_access},
 143        {0x1926103C, "Smart Array", &SA5_access},
 144        {0x1928103C, "Smart Array", &SA5_access},
 145        {0x334d103C, "Smart Array P822se", &SA5_access},
 146        {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 147};
 148
 149static int number_of_controllers;
 150
 151static struct list_head hpsa_ctlr_list = LIST_HEAD_INIT(hpsa_ctlr_list);
 152static spinlock_t lockup_detector_lock;
 153static struct task_struct *hpsa_lockup_detector;
 154
 155static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 156static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 157static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 158static void start_io(struct ctlr_info *h);
 159
 160#ifdef CONFIG_COMPAT
 161static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 162#endif
 163
 164static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 165static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 166static struct CommandList *cmd_alloc(struct ctlr_info *h);
 167static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 168static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 169        void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 170        int cmd_type);
 171
 172static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 173static void hpsa_scan_start(struct Scsi_Host *);
 174static int hpsa_scan_finished(struct Scsi_Host *sh,
 175        unsigned long elapsed_time);
 176static int hpsa_change_queue_depth(struct scsi_device *sdev,
 177        int qdepth, int reason);
 178
 179static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 180static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
 181static int hpsa_slave_alloc(struct scsi_device *sdev);
 182static void hpsa_slave_destroy(struct scsi_device *sdev);
 183
 184static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 185static int check_for_unit_attention(struct ctlr_info *h,
 186        struct CommandList *c);
 187static void check_ioctl_unit_attention(struct ctlr_info *h,
 188        struct CommandList *c);
 189/* performant mode helper functions */
 190static void calc_bucket_map(int *bucket, int num_buckets,
 191        int nsgs, int *bucket_map);
 192static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 193static inline u32 next_command(struct ctlr_info *h, u8 q);
 194static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
 195                               u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 196                               u64 *cfg_offset);
 197static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 198                                    unsigned long *memory_bar);
 199static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 200static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
 201                                     int wait_for_ready);
 202static inline void finish_cmd(struct CommandList *c);
 203#define BOARD_NOT_READY 0
 204#define BOARD_READY 1
 205
 206static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 207{
 208        unsigned long *priv = shost_priv(sdev->host);
 209        return (struct ctlr_info *) *priv;
 210}
 211
 212static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 213{
 214        unsigned long *priv = shost_priv(sh);
 215        return (struct ctlr_info *) *priv;
 216}
 217
 218static int check_for_unit_attention(struct ctlr_info *h,
 219        struct CommandList *c)
 220{
 221        if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 222                return 0;
 223
 224        switch (c->err_info->SenseInfo[12]) {
 225        case STATE_CHANGED:
 226                dev_warn(&h->pdev->dev, HPSA "%d: a state change "
 227                        "detected, command retried\n", h->ctlr);
 228                break;
 229        case LUN_FAILED:
 230                dev_warn(&h->pdev->dev, HPSA "%d: LUN failure "
 231                        "detected, action required\n", h->ctlr);
 232                break;
 233        case REPORT_LUNS_CHANGED:
 234                dev_warn(&h->pdev->dev, HPSA "%d: report LUN data "
 235                        "changed, action required\n", h->ctlr);
 236        /*
 237         * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
 238         * target (array) devices.
 239         */
 240                break;
 241        case POWER_OR_RESET:
 242                dev_warn(&h->pdev->dev, HPSA "%d: a power on "
 243                        "or device reset detected\n", h->ctlr);
 244                break;
 245        case UNIT_ATTENTION_CLEARED:
 246                dev_warn(&h->pdev->dev, HPSA "%d: unit attention "
 247                    "cleared by another initiator\n", h->ctlr);
 248                break;
 249        default:
 250                dev_warn(&h->pdev->dev, HPSA "%d: unknown "
 251                        "unit attention detected\n", h->ctlr);
 252                break;
 253        }
 254        return 1;
 255}
 256
 257static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 258{
 259        if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
 260                (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
 261                 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
 262                return 0;
 263        dev_warn(&h->pdev->dev, HPSA "device busy");
 264        return 1;
 265}
 266
 267static ssize_t host_store_rescan(struct device *dev,
 268                                 struct device_attribute *attr,
 269                                 const char *buf, size_t count)
 270{
 271        struct ctlr_info *h;
 272        struct Scsi_Host *shost = class_to_shost(dev);
 273        h = shost_to_hba(shost);
 274        hpsa_scan_start(h->scsi_host);
 275        return count;
 276}
 277
 278static ssize_t host_show_firmware_revision(struct device *dev,
 279             struct device_attribute *attr, char *buf)
 280{
 281        struct ctlr_info *h;
 282        struct Scsi_Host *shost = class_to_shost(dev);
 283        unsigned char *fwrev;
 284
 285        h = shost_to_hba(shost);
 286        if (!h->hba_inquiry_data)
 287                return 0;
 288        fwrev = &h->hba_inquiry_data[32];
 289        return snprintf(buf, 20, "%c%c%c%c\n",
 290                fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 291}
 292
 293static ssize_t host_show_commands_outstanding(struct device *dev,
 294             struct device_attribute *attr, char *buf)
 295{
 296        struct Scsi_Host *shost = class_to_shost(dev);
 297        struct ctlr_info *h = shost_to_hba(shost);
 298
 299        return snprintf(buf, 20, "%d\n", h->commands_outstanding);
 300}
 301
 302static ssize_t host_show_transport_mode(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
 308        h = shost_to_hba(shost);
 309        return snprintf(buf, 20, "%s\n",
 310                h->transMethod & CFGTBL_Trans_Performant ?
 311                        "performant" : "simple");
 312}
 313
 314/* List of controllers which cannot be hard reset on kexec with reset_devices */
 315static u32 unresettable_controller[] = {
 316        0x324a103C, /* Smart Array P712m */
 317        0x324b103C, /* SmartArray P711m */
 318        0x3223103C, /* Smart Array P800 */
 319        0x3234103C, /* Smart Array P400 */
 320        0x3235103C, /* Smart Array P400i */
 321        0x3211103C, /* Smart Array E200i */
 322        0x3212103C, /* Smart Array E200 */
 323        0x3213103C, /* Smart Array E200i */
 324        0x3214103C, /* Smart Array E200i */
 325        0x3215103C, /* Smart Array E200i */
 326        0x3237103C, /* Smart Array E500 */
 327        0x323D103C, /* Smart Array P700m */
 328        0x40800E11, /* Smart Array 5i */
 329        0x409C0E11, /* Smart Array 6400 */
 330        0x409D0E11, /* Smart Array 6400 EM */
 331        0x40700E11, /* Smart Array 5300 */
 332        0x40820E11, /* Smart Array 532 */
 333        0x40830E11, /* Smart Array 5312 */
 334        0x409A0E11, /* Smart Array 641 */
 335        0x409B0E11, /* Smart Array 642 */
 336        0x40910E11, /* Smart Array 6i */
 337};
 338
 339/* List of controllers which cannot even be soft reset */
 340static u32 soft_unresettable_controller[] = {
 341        0x40800E11, /* Smart Array 5i */
 342        0x40700E11, /* Smart Array 5300 */
 343        0x40820E11, /* Smart Array 532 */
 344        0x40830E11, /* Smart Array 5312 */
 345        0x409A0E11, /* Smart Array 641 */
 346        0x409B0E11, /* Smart Array 642 */
 347        0x40910E11, /* Smart Array 6i */
 348        /* Exclude 640x boards.  These are two pci devices in one slot
 349         * which share a battery backed cache module.  One controls the
 350         * cache, the other accesses the cache through the one that controls
 351         * it.  If we reset the one controlling the cache, the other will
 352         * likely not be happy.  Just forbid resetting this conjoined mess.
 353         * The 640x isn't really supported by hpsa anyway.
 354         */
 355        0x409C0E11, /* Smart Array 6400 */
 356        0x409D0E11, /* Smart Array 6400 EM */
 357};
 358
 359static int ctlr_is_hard_resettable(u32 board_id)
 360{
 361        int i;
 362
 363        for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
 364                if (unresettable_controller[i] == board_id)
 365                        return 0;
 366        return 1;
 367}
 368
 369static int ctlr_is_soft_resettable(u32 board_id)
 370{
 371        int i;
 372
 373        for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
 374                if (soft_unresettable_controller[i] == board_id)
 375                        return 0;
 376        return 1;
 377}
 378
 379static int ctlr_is_resettable(u32 board_id)
 380{
 381        return ctlr_is_hard_resettable(board_id) ||
 382                ctlr_is_soft_resettable(board_id);
 383}
 384
 385static ssize_t host_show_resettable(struct device *dev,
 386        struct device_attribute *attr, char *buf)
 387{
 388        struct ctlr_info *h;
 389        struct Scsi_Host *shost = class_to_shost(dev);
 390
 391        h = shost_to_hba(shost);
 392        return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 393}
 394
 395static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 396{
 397        return (scsi3addr[3] & 0xC0) == 0x40;
 398}
 399
 400static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 401        "1(ADM)", "UNKNOWN"
 402};
 403#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 404
 405static ssize_t raid_level_show(struct device *dev,
 406             struct device_attribute *attr, char *buf)
 407{
 408        ssize_t l = 0;
 409        unsigned char rlevel;
 410        struct ctlr_info *h;
 411        struct scsi_device *sdev;
 412        struct hpsa_scsi_dev_t *hdev;
 413        unsigned long flags;
 414
 415        sdev = to_scsi_device(dev);
 416        h = sdev_to_hba(sdev);
 417        spin_lock_irqsave(&h->lock, flags);
 418        hdev = sdev->hostdata;
 419        if (!hdev) {
 420                spin_unlock_irqrestore(&h->lock, flags);
 421                return -ENODEV;
 422        }
 423
 424        /* Is this even a logical drive? */
 425        if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 426                spin_unlock_irqrestore(&h->lock, flags);
 427                l = snprintf(buf, PAGE_SIZE, "N/A\n");
 428                return l;
 429        }
 430
 431        rlevel = hdev->raid_level;
 432        spin_unlock_irqrestore(&h->lock, flags);
 433        if (rlevel > RAID_UNKNOWN)
 434                rlevel = RAID_UNKNOWN;
 435        l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 436        return l;
 437}
 438
 439static ssize_t lunid_show(struct device *dev,
 440             struct device_attribute *attr, char *buf)
 441{
 442        struct ctlr_info *h;
 443        struct scsi_device *sdev;
 444        struct hpsa_scsi_dev_t *hdev;
 445        unsigned long flags;
 446        unsigned char lunid[8];
 447
 448        sdev = to_scsi_device(dev);
 449        h = sdev_to_hba(sdev);
 450        spin_lock_irqsave(&h->lock, flags);
 451        hdev = sdev->hostdata;
 452        if (!hdev) {
 453                spin_unlock_irqrestore(&h->lock, flags);
 454                return -ENODEV;
 455        }
 456        memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 457        spin_unlock_irqrestore(&h->lock, flags);
 458        return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 459                lunid[0], lunid[1], lunid[2], lunid[3],
 460                lunid[4], lunid[5], lunid[6], lunid[7]);
 461}
 462
 463static ssize_t unique_id_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 sn[16];
 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(sn, hdev->device_id, sizeof(sn));
 481        spin_unlock_irqrestore(&h->lock, flags);
 482        return snprintf(buf, 16 * 2 + 2,
 483                        "%02X%02X%02X%02X%02X%02X%02X%02X"
 484                        "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 485                        sn[0], sn[1], sn[2], sn[3],
 486                        sn[4], sn[5], sn[6], sn[7],
 487                        sn[8], sn[9], sn[10], sn[11],
 488                        sn[12], sn[13], sn[14], sn[15]);
 489}
 490
 491static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 492static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 493static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 494static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 495static DEVICE_ATTR(firmware_revision, S_IRUGO,
 496        host_show_firmware_revision, NULL);
 497static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 498        host_show_commands_outstanding, NULL);
 499static DEVICE_ATTR(transport_mode, S_IRUGO,
 500        host_show_transport_mode, NULL);
 501static DEVICE_ATTR(resettable, S_IRUGO,
 502        host_show_resettable, NULL);
 503
 504static struct device_attribute *hpsa_sdev_attrs[] = {
 505        &dev_attr_raid_level,
 506        &dev_attr_lunid,
 507        &dev_attr_unique_id,
 508        NULL,
 509};
 510
 511static struct device_attribute *hpsa_shost_attrs[] = {
 512        &dev_attr_rescan,
 513        &dev_attr_firmware_revision,
 514        &dev_attr_commands_outstanding,
 515        &dev_attr_transport_mode,
 516        &dev_attr_resettable,
 517        NULL,
 518};
 519
 520static struct scsi_host_template hpsa_driver_template = {
 521        .module                 = THIS_MODULE,
 522        .name                   = HPSA,
 523        .proc_name              = HPSA,
 524        .queuecommand           = hpsa_scsi_queue_command,
 525        .scan_start             = hpsa_scan_start,
 526        .scan_finished          = hpsa_scan_finished,
 527        .change_queue_depth     = hpsa_change_queue_depth,
 528        .this_id                = -1,
 529        .use_clustering         = ENABLE_CLUSTERING,
 530        .eh_abort_handler       = hpsa_eh_abort_handler,
 531        .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 532        .ioctl                  = hpsa_ioctl,
 533        .slave_alloc            = hpsa_slave_alloc,
 534        .slave_destroy          = hpsa_slave_destroy,
 535#ifdef CONFIG_COMPAT
 536        .compat_ioctl           = hpsa_compat_ioctl,
 537#endif
 538        .sdev_attrs = hpsa_sdev_attrs,
 539        .shost_attrs = hpsa_shost_attrs,
 540        .max_sectors = 8192,
 541};
 542
 543
 544/* Enqueuing and dequeuing functions for cmdlists. */
 545static inline void addQ(struct list_head *list, struct CommandList *c)
 546{
 547        list_add_tail(&c->list, list);
 548}
 549
 550static inline u32 next_command(struct ctlr_info *h, u8 q)
 551{
 552        u32 a;
 553        struct reply_pool *rq = &h->reply_queue[q];
 554        unsigned long flags;
 555
 556        if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 557                return h->access.command_completed(h, q);
 558
 559        if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
 560                a = rq->head[rq->current_entry];
 561                rq->current_entry++;
 562                spin_lock_irqsave(&h->lock, flags);
 563                h->commands_outstanding--;
 564                spin_unlock_irqrestore(&h->lock, flags);
 565        } else {
 566                a = FIFO_EMPTY;
 567        }
 568        /* Check for wraparound */
 569        if (rq->current_entry == h->max_commands) {
 570                rq->current_entry = 0;
 571                rq->wraparound ^= 1;
 572        }
 573        return a;
 574}
 575
 576/* set_performant_mode: Modify the tag for cciss performant
 577 * set bit 0 for pull model, bits 3-1 for block fetch
 578 * register number
 579 */
 580static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 581{
 582        if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
 583                c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 584                if (likely(h->msix_vector))
 585                        c->Header.ReplyQueue =
 586                                smp_processor_id() % h->nreply_queues;
 587        }
 588}
 589
 590static int is_firmware_flash_cmd(u8 *cdb)
 591{
 592        return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
 593}
 594
 595/*
 596 * During firmware flash, the heartbeat register may not update as frequently
 597 * as it should.  So we dial down lockup detection during firmware flash. and
 598 * dial it back up when firmware flash completes.
 599 */
 600#define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
 601#define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
 602static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
 603                struct CommandList *c)
 604{
 605        if (!is_firmware_flash_cmd(c->Request.CDB))
 606                return;
 607        atomic_inc(&h->firmware_flash_in_progress);
 608        h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
 609}
 610
 611static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
 612                struct CommandList *c)
 613{
 614        if (is_firmware_flash_cmd(c->Request.CDB) &&
 615                atomic_dec_and_test(&h->firmware_flash_in_progress))
 616                h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
 617}
 618
 619static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 620        struct CommandList *c)
 621{
 622        unsigned long flags;
 623
 624        set_performant_mode(h, c);
 625        dial_down_lockup_detection_during_fw_flash(h, c);
 626        spin_lock_irqsave(&h->lock, flags);
 627        addQ(&h->reqQ, c);
 628        h->Qdepth++;
 629        spin_unlock_irqrestore(&h->lock, flags);
 630        start_io(h);
 631}
 632
 633static inline void removeQ(struct CommandList *c)
 634{
 635        if (WARN_ON(list_empty(&c->list)))
 636                return;
 637        list_del_init(&c->list);
 638}
 639
 640static inline int is_hba_lunid(unsigned char scsi3addr[])
 641{
 642        return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 643}
 644
 645static inline int is_scsi_rev_5(struct ctlr_info *h)
 646{
 647        if (!h->hba_inquiry_data)
 648                return 0;
 649        if ((h->hba_inquiry_data[2] & 0x07) == 5)
 650                return 1;
 651        return 0;
 652}
 653
 654static int hpsa_find_target_lun(struct ctlr_info *h,
 655        unsigned char scsi3addr[], int bus, int *target, int *lun)
 656{
 657        /* finds an unused bus, target, lun for a new physical device
 658         * assumes h->devlock is held
 659         */
 660        int i, found = 0;
 661        DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
 662
 663        bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
 664
 665        for (i = 0; i < h->ndevices; i++) {
 666                if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 667                        __set_bit(h->dev[i]->target, lun_taken);
 668        }
 669
 670        i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
 671        if (i < HPSA_MAX_DEVICES) {
 672                /* *bus = 1; */
 673                *target = i;
 674                *lun = 0;
 675                found = 1;
 676        }
 677        return !found;
 678}
 679
 680/* Add an entry into h->dev[] array. */
 681static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 682                struct hpsa_scsi_dev_t *device,
 683                struct hpsa_scsi_dev_t *added[], int *nadded)
 684{
 685        /* assumes h->devlock is held */
 686        int n = h->ndevices;
 687        int i;
 688        unsigned char addr1[8], addr2[8];
 689        struct hpsa_scsi_dev_t *sd;
 690
 691        if (n >= HPSA_MAX_DEVICES) {
 692                dev_err(&h->pdev->dev, "too many devices, some will be "
 693                        "inaccessible.\n");
 694                return -1;
 695        }
 696
 697        /* physical devices do not have lun or target assigned until now. */
 698        if (device->lun != -1)
 699                /* Logical device, lun is already assigned. */
 700                goto lun_assigned;
 701
 702        /* If this device a non-zero lun of a multi-lun device
 703         * byte 4 of the 8-byte LUN addr will contain the logical
 704         * unit no, zero otherise.
 705         */
 706        if (device->scsi3addr[4] == 0) {
 707                /* This is not a non-zero lun of a multi-lun device */
 708                if (hpsa_find_target_lun(h, device->scsi3addr,
 709                        device->bus, &device->target, &device->lun) != 0)
 710                        return -1;
 711                goto lun_assigned;
 712        }
 713
 714        /* This is a non-zero lun of a multi-lun device.
 715         * Search through our list and find the device which
 716         * has the same 8 byte LUN address, excepting byte 4.
 717         * Assign the same bus and target for this new LUN.
 718         * Use the logical unit number from the firmware.
 719         */
 720        memcpy(addr1, device->scsi3addr, 8);
 721        addr1[4] = 0;
 722        for (i = 0; i < n; i++) {
 723                sd = h->dev[i];
 724                memcpy(addr2, sd->scsi3addr, 8);
 725                addr2[4] = 0;
 726                /* differ only in byte 4? */
 727                if (memcmp(addr1, addr2, 8) == 0) {
 728                        device->bus = sd->bus;
 729                        device->target = sd->target;
 730                        device->lun = device->scsi3addr[4];
 731                        break;
 732                }
 733        }
 734        if (device->lun == -1) {
 735                dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 736                        " suspect firmware bug or unsupported hardware "
 737                        "configuration.\n");
 738                        return -1;
 739        }
 740
 741lun_assigned:
 742
 743        h->dev[n] = device;
 744        h->ndevices++;
 745        added[*nadded] = device;
 746        (*nadded)++;
 747
 748        /* initially, (before registering with scsi layer) we don't
 749         * know our hostno and we don't want to print anything first
 750         * time anyway (the scsi layer's inquiries will show that info)
 751         */
 752        /* if (hostno != -1) */
 753                dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 754                        scsi_device_type(device->devtype), hostno,
 755                        device->bus, device->target, device->lun);
 756        return 0;
 757}
 758
 759/* Update an entry in h->dev[] array. */
 760static void hpsa_scsi_update_entry(struct ctlr_info *h, int hostno,
 761        int entry, struct hpsa_scsi_dev_t *new_entry)
 762{
 763        /* assumes h->devlock is held */
 764        BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
 765
 766        /* Raid level changed. */
 767        h->dev[entry]->raid_level = new_entry->raid_level;
 768        dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d updated.\n",
 769                scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 770                new_entry->target, new_entry->lun);
 771}
 772
 773/* Replace an entry from h->dev[] array. */
 774static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 775        int entry, struct hpsa_scsi_dev_t *new_entry,
 776        struct hpsa_scsi_dev_t *added[], int *nadded,
 777        struct hpsa_scsi_dev_t *removed[], int *nremoved)
 778{
 779        /* assumes h->devlock is held */
 780        BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
 781        removed[*nremoved] = h->dev[entry];
 782        (*nremoved)++;
 783
 784        /*
 785         * New physical devices won't have target/lun assigned yet
 786         * so we need to preserve the values in the slot we are replacing.
 787         */
 788        if (new_entry->target == -1) {
 789                new_entry->target = h->dev[entry]->target;
 790                new_entry->lun = h->dev[entry]->lun;
 791        }
 792
 793        h->dev[entry] = new_entry;
 794        added[*nadded] = new_entry;
 795        (*nadded)++;
 796        dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 797                scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 798                        new_entry->target, new_entry->lun);
 799}
 800
 801/* Remove an entry from h->dev[] array. */
 802static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 803        struct hpsa_scsi_dev_t *removed[], int *nremoved)
 804{
 805        /* assumes h->devlock is held */
 806        int i;
 807        struct hpsa_scsi_dev_t *sd;
 808
 809        BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
 810
 811        sd = h->dev[entry];
 812        removed[*nremoved] = h->dev[entry];
 813        (*nremoved)++;
 814
 815        for (i = entry; i < h->ndevices-1; i++)
 816                h->dev[i] = h->dev[i+1];
 817        h->ndevices--;
 818        dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 819                scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 820                sd->lun);
 821}
 822
 823#define SCSI3ADDR_EQ(a, b) ( \
 824        (a)[7] == (b)[7] && \
 825        (a)[6] == (b)[6] && \
 826        (a)[5] == (b)[5] && \
 827        (a)[4] == (b)[4] && \
 828        (a)[3] == (b)[3] && \
 829        (a)[2] == (b)[2] && \
 830        (a)[1] == (b)[1] && \
 831        (a)[0] == (b)[0])
 832
 833static void fixup_botched_add(struct ctlr_info *h,
 834        struct hpsa_scsi_dev_t *added)
 835{
 836        /* called when scsi_add_device fails in order to re-adjust
 837         * h->dev[] to match the mid layer's view.
 838         */
 839        unsigned long flags;
 840        int i, j;
 841
 842        spin_lock_irqsave(&h->lock, flags);
 843        for (i = 0; i < h->ndevices; i++) {
 844                if (h->dev[i] == added) {
 845                        for (j = i; j < h->ndevices-1; j++)
 846                                h->dev[j] = h->dev[j+1];
 847                        h->ndevices--;
 848                        break;
 849                }
 850        }
 851        spin_unlock_irqrestore(&h->lock, flags);
 852        kfree(added);
 853}
 854
 855static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 856        struct hpsa_scsi_dev_t *dev2)
 857{
 858        /* we compare everything except lun and target as these
 859         * are not yet assigned.  Compare parts likely
 860         * to differ first
 861         */
 862        if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 863                sizeof(dev1->scsi3addr)) != 0)
 864                return 0;
 865        if (memcmp(dev1->device_id, dev2->device_id,
 866                sizeof(dev1->device_id)) != 0)
 867                return 0;
 868        if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 869                return 0;
 870        if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 871                return 0;
 872        if (dev1->devtype != dev2->devtype)
 873                return 0;
 874        if (dev1->bus != dev2->bus)
 875                return 0;
 876        return 1;
 877}
 878
 879static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
 880        struct hpsa_scsi_dev_t *dev2)
 881{
 882        /* Device attributes that can change, but don't mean
 883         * that the device is a different device, nor that the OS
 884         * needs to be told anything about the change.
 885         */
 886        if (dev1->raid_level != dev2->raid_level)
 887                return 1;
 888        return 0;
 889}
 890
 891/* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 892 * and return needle location in *index.  If scsi3addr matches, but not
 893 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 894 * location in *index.
 895 * In the case of a minor device attribute change, such as RAID level, just
 896 * return DEVICE_UPDATED, along with the updated device's location in index.
 897 * If needle not found, return DEVICE_NOT_FOUND.
 898 */
 899static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 900        struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 901        int *index)
 902{
 903        int i;
 904#define DEVICE_NOT_FOUND 0
 905#define DEVICE_CHANGED 1
 906#define DEVICE_SAME 2
 907#define DEVICE_UPDATED 3
 908        for (i = 0; i < haystack_size; i++) {
 909                if (haystack[i] == NULL) /* previously removed. */
 910                        continue;
 911                if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 912                        *index = i;
 913                        if (device_is_the_same(needle, haystack[i])) {
 914                                if (device_updated(needle, haystack[i]))
 915                                        return DEVICE_UPDATED;
 916                                return DEVICE_SAME;
 917                        } else {
 918                                return DEVICE_CHANGED;
 919                        }
 920                }
 921        }
 922        *index = -1;
 923        return DEVICE_NOT_FOUND;
 924}
 925
 926static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 927        struct hpsa_scsi_dev_t *sd[], int nsds)
 928{
 929        /* sd contains scsi3 addresses and devtypes, and inquiry
 930         * data.  This function takes what's in sd to be the current
 931         * reality and updates h->dev[] to reflect that reality.
 932         */
 933        int i, entry, device_change, changes = 0;
 934        struct hpsa_scsi_dev_t *csd;
 935        unsigned long flags;
 936        struct hpsa_scsi_dev_t **added, **removed;
 937        int nadded, nremoved;
 938        struct Scsi_Host *sh = NULL;
 939
 940        added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
 941        removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
 942
 943        if (!added || !removed) {
 944                dev_warn(&h->pdev->dev, "out of memory in "
 945                        "adjust_hpsa_scsi_table\n");
 946                goto free_and_out;
 947        }
 948
 949        spin_lock_irqsave(&h->devlock, flags);
 950
 951        /* find any devices in h->dev[] that are not in
 952         * sd[] and remove them from h->dev[], and for any
 953         * devices which have changed, remove the old device
 954         * info and add the new device info.
 955         * If minor device attributes change, just update
 956         * the existing device structure.
 957         */
 958        i = 0;
 959        nremoved = 0;
 960        nadded = 0;
 961        while (i < h->ndevices) {
 962                csd = h->dev[i];
 963                device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 964                if (device_change == DEVICE_NOT_FOUND) {
 965                        changes++;
 966                        hpsa_scsi_remove_entry(h, hostno, i,
 967                                removed, &nremoved);
 968                        continue; /* remove ^^^, hence i not incremented */
 969                } else if (device_change == DEVICE_CHANGED) {
 970                        changes++;
 971                        hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 972                                added, &nadded, removed, &nremoved);
 973                        /* Set it to NULL to prevent it from being freed
 974                         * at the bottom of hpsa_update_scsi_devices()
 975                         */
 976                        sd[entry] = NULL;
 977                } else if (device_change == DEVICE_UPDATED) {
 978                        hpsa_scsi_update_entry(h, hostno, i, sd[entry]);
 979                }
 980                i++;
 981        }
 982
 983        /* Now, make sure every device listed in sd[] is also
 984         * listed in h->dev[], adding them if they aren't found
 985         */
 986
 987        for (i = 0; i < nsds; i++) {
 988                if (!sd[i]) /* if already added above. */
 989                        continue;
 990                device_change = hpsa_scsi_find_entry(sd[i], h->dev,
 991                                        h->ndevices, &entry);
 992                if (device_change == DEVICE_NOT_FOUND) {
 993                        changes++;
 994                        if (hpsa_scsi_add_entry(h, hostno, sd[i],
 995                                added, &nadded) != 0)
 996                                break;
 997                        sd[i] = NULL; /* prevent from being freed later. */
 998                } else if (device_change == DEVICE_CHANGED) {
 999                        /* should never happen... */
1000                        changes++;
1001                        dev_warn(&h->pdev->dev,
1002                                "device unexpectedly changed.\n");
1003                        /* but if it does happen, we just ignore that device */
1004                }
1005        }
1006        spin_unlock_irqrestore(&h->devlock, flags);
1007
1008        /* Don't notify scsi mid layer of any changes the first time through
1009         * (or if there are no changes) scsi_scan_host will do it later the
1010         * first time through.
1011         */
1012        if (hostno == -1 || !changes)
1013                goto free_and_out;
1014
1015        sh = h->scsi_host;
1016        /* Notify scsi mid layer of any removed devices */
1017        for (i = 0; i < nremoved; i++) {
1018                struct scsi_device *sdev =
1019                        scsi_device_lookup(sh, removed[i]->bus,
1020                                removed[i]->target, removed[i]->lun);
1021                if (sdev != NULL) {
1022                        scsi_remove_device(sdev);
1023                        scsi_device_put(sdev);
1024                } else {
1025                        /* We don't expect to get here.
1026                         * future cmds to this device will get selection
1027                         * timeout as if the device was gone.
1028                         */
1029                        dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
1030                                " for removal.", hostno, removed[i]->bus,
1031                                removed[i]->target, removed[i]->lun);
1032                }
1033                kfree(removed[i]);
1034                removed[i] = NULL;
1035        }
1036
1037        /* Notify scsi mid layer of any added devices */
1038        for (i = 0; i < nadded; i++) {
1039                if (scsi_add_device(sh, added[i]->bus,
1040                        added[i]->target, added[i]->lun) == 0)
1041                        continue;
1042                dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
1043                        "device not added.\n", hostno, added[i]->bus,
1044                        added[i]->target, added[i]->lun);
1045                /* now we have to remove it from h->dev,
1046                 * since it didn't get added to scsi mid layer
1047                 */
1048                fixup_botched_add(h, added[i]);
1049        }
1050
1051free_and_out:
1052        kfree(added);
1053        kfree(removed);
1054}
1055
1056/*
1057 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
1058 * Assume's h->devlock is held.
1059 */
1060static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
1061        int bus, int target, int lun)
1062{
1063        int i;
1064        struct hpsa_scsi_dev_t *sd;
1065
1066        for (i = 0; i < h->ndevices; i++) {
1067                sd = h->dev[i];
1068                if (sd->bus == bus && sd->target == target && sd->lun == lun)
1069                        return sd;
1070        }
1071        return NULL;
1072}
1073
1074/* link sdev->hostdata to our per-device structure. */
1075static int hpsa_slave_alloc(struct scsi_device *sdev)
1076{
1077        struct hpsa_scsi_dev_t *sd;
1078        unsigned long flags;
1079        struct ctlr_info *h;
1080
1081        h = sdev_to_hba(sdev);
1082        spin_lock_irqsave(&h->devlock, flags);
1083        sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
1084                sdev_id(sdev), sdev->lun);
1085        if (sd != NULL)
1086                sdev->hostdata = sd;
1087        spin_unlock_irqrestore(&h->devlock, flags);
1088        return 0;
1089}
1090
1091static void hpsa_slave_destroy(struct scsi_device *sdev)
1092{
1093        /* nothing to do. */
1094}
1095
1096static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
1097{
1098        int i;
1099
1100        if (!h->cmd_sg_list)
1101                return;
1102        for (i = 0; i < h->nr_cmds; i++) {
1103                kfree(h->cmd_sg_list[i]);
1104                h->cmd_sg_list[i] = NULL;
1105        }
1106        kfree(h->cmd_sg_list);
1107        h->cmd_sg_list = NULL;
1108}
1109
1110static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
1111{
1112        int i;
1113
1114        if (h->chainsize <= 0)
1115                return 0;
1116
1117        h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
1118                                GFP_KERNEL);
1119        if (!h->cmd_sg_list)
1120                return -ENOMEM;
1121        for (i = 0; i < h->nr_cmds; i++) {
1122                h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
1123                                                h->chainsize, GFP_KERNEL);
1124                if (!h->cmd_sg_list[i])
1125                        goto clean;
1126        }
1127        return 0;
1128
1129clean:
1130        hpsa_free_sg_chain_blocks(h);
1131        return -ENOMEM;
1132}
1133
1134static int hpsa_map_sg_chain_block(struct ctlr_info *h,
1135        struct CommandList *c)
1136{
1137        struct SGDescriptor *chain_sg, *chain_block;
1138        u64 temp64;
1139
1140        chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1141        chain_block = h->cmd_sg_list[c->cmdindex];
1142        chain_sg->Ext = HPSA_SG_CHAIN;
1143        chain_sg->Len = sizeof(*chain_sg) *
1144                (c->Header.SGTotal - h->max_cmd_sg_entries);
1145        temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
1146                                PCI_DMA_TODEVICE);
1147        if (dma_mapping_error(&h->pdev->dev, temp64)) {
1148                /* prevent subsequent unmapping */
1149                chain_sg->Addr.lower = 0;
1150                chain_sg->Addr.upper = 0;
1151                return -1;
1152        }
1153        chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
1154        chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1155        return 0;
1156}
1157
1158static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
1159        struct CommandList *c)
1160{
1161        struct SGDescriptor *chain_sg;
1162        union u64bit temp64;
1163
1164        if (c->Header.SGTotal <= h->max_cmd_sg_entries)
1165                return;
1166
1167        chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1168        temp64.val32.lower = chain_sg->Addr.lower;
1169        temp64.val32.upper = chain_sg->Addr.upper;
1170        pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
1171}
1172
1173static void complete_scsi_command(struct CommandList *cp)
1174{
1175        struct scsi_cmnd *cmd;
1176        struct ctlr_info *h;
1177        struct ErrorInfo *ei;
1178
1179        unsigned char sense_key;
1180        unsigned char asc;      /* additional sense code */
1181        unsigned char ascq;     /* additional sense code qualifier */
1182        unsigned long sense_data_size;
1183
1184        ei = cp->err_info;
1185        cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1186        h = cp->h;
1187
1188        scsi_dma_unmap(cmd); /* undo the DMA mappings */
1189        if (cp->Header.SGTotal > h->max_cmd_sg_entries)
1190                hpsa_unmap_sg_chain_block(h, cp);
1191
1192        cmd->result = (DID_OK << 16);           /* host byte */
1193        cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1194        cmd->result |= ei->ScsiStatus;
1195
1196        /* copy the sense data whether we need to or not. */
1197        if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
1198                sense_data_size = SCSI_SENSE_BUFFERSIZE;
1199        else
1200                sense_data_size = sizeof(ei->SenseInfo);
1201        if (ei->SenseLen < sense_data_size)
1202                sense_data_size = ei->SenseLen;
1203
1204        memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
1205        scsi_set_resid(cmd, ei->ResidualCnt);
1206
1207        if (ei->CommandStatus == 0) {
1208                cmd->scsi_done(cmd);
1209                cmd_free(h, cp);
1210                return;
1211        }
1212
1213        /* an error has occurred */
1214        switch (ei->CommandStatus) {
1215
1216        case CMD_TARGET_STATUS:
1217                if (ei->ScsiStatus) {
1218                        /* Get sense key */
1219                        sense_key = 0xf & ei->SenseInfo[2];
1220                        /* Get additional sense code */
1221                        asc = ei->SenseInfo[12];
1222                        /* Get addition sense code qualifier */
1223                        ascq = ei->SenseInfo[13];
1224                }
1225
1226                if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1227                        if (check_for_unit_attention(h, cp)) {
1228                                cmd->result = DID_SOFT_ERROR << 16;
1229                                break;
1230                        }
1231                        if (sense_key == ILLEGAL_REQUEST) {
1232                                /*
1233                                 * SCSI REPORT_LUNS is commonly unsupported on
1234                                 * Smart Array.  Suppress noisy complaint.
1235                                 */
1236                                if (cp->Request.CDB[0] == REPORT_LUNS)
1237                                        break;
1238
1239                                /* If ASC/ASCQ indicate Logical Unit
1240                                 * Not Supported condition,
1241                                 */
1242                                if ((asc == 0x25) && (ascq == 0x0)) {
1243                                        dev_warn(&h->pdev->dev, "cp %p "
1244                                                "has check condition\n", cp);
1245                                        break;
1246                                }
1247                        }
1248
1249                        if (sense_key == NOT_READY) {
1250                                /* If Sense is Not Ready, Logical Unit
1251                                 * Not ready, Manual Intervention
1252                                 * required
1253                                 */
1254                                if ((asc == 0x04) && (ascq == 0x03)) {
1255                                        dev_warn(&h->pdev->dev, "cp %p "
1256                                                "has check condition: unit "
1257                                                "not ready, manual "
1258                                                "intervention required\n", cp);
1259                                        break;
1260                                }
1261                        }
1262                        if (sense_key == ABORTED_COMMAND) {
1263                                /* Aborted command is retryable */
1264                                dev_warn(&h->pdev->dev, "cp %p "
1265                                        "has check condition: aborted command: "
1266                                        "ASC: 0x%x, ASCQ: 0x%x\n",
1267                                        cp, asc, ascq);
1268                                cmd->result = DID_SOFT_ERROR << 16;
1269                                break;
1270                        }
1271                        /* Must be some other type of check condition */
1272                        dev_dbg(&h->pdev->dev, "cp %p has check condition: "
1273                                        "unknown type: "
1274                                        "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1275                                        "Returning result: 0x%x, "
1276                                        "cmd=[%02x %02x %02x %02x %02x "
1277                                        "%02x %02x %02x %02x %02x %02x "
1278                                        "%02x %02x %02x %02x %02x]\n",
1279                                        cp, sense_key, asc, ascq,
1280                                        cmd->result,
1281                                        cmd->cmnd[0], cmd->cmnd[1],
1282                                        cmd->cmnd[2], cmd->cmnd[3],
1283                                        cmd->cmnd[4], cmd->cmnd[5],
1284                                        cmd->cmnd[6], cmd->cmnd[7],
1285                                        cmd->cmnd[8], cmd->cmnd[9],
1286                                        cmd->cmnd[10], cmd->cmnd[11],
1287                                        cmd->cmnd[12], cmd->cmnd[13],
1288                                        cmd->cmnd[14], cmd->cmnd[15]);
1289                        break;
1290                }
1291
1292
1293                /* Problem was not a check condition
1294                 * Pass it up to the upper layers...
1295                 */
1296                if (ei->ScsiStatus) {
1297                        dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1298                                "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1299                                "Returning result: 0x%x\n",
1300                                cp, ei->ScsiStatus,
1301                                sense_key, asc, ascq,
1302                                cmd->result);
1303                } else {  /* scsi status is zero??? How??? */
1304                        dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1305                                "Returning no connection.\n", cp),
1306
1307                        /* Ordinarily, this case should never happen,
1308                         * but there is a bug in some released firmware
1309                         * revisions that allows it to happen if, for
1310                         * example, a 4100 backplane loses power and
1311                         * the tape drive is in it.  We assume that
1312                         * it's a fatal error of some kind because we
1313                         * can't show that it wasn't. We will make it
1314                         * look like selection timeout since that is
1315                         * the most common reason for this to occur,
1316                         * and it's severe enough.
1317                         */
1318
1319                        cmd->result = DID_NO_CONNECT << 16;
1320                }
1321                break;
1322
1323        case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1324                break;
1325        case CMD_DATA_OVERRUN:
1326                dev_warn(&h->pdev->dev, "cp %p has"
1327                        " completed with data overrun "
1328                        "reported\n", cp);
1329                break;
1330        case CMD_INVALID: {
1331                /* print_bytes(cp, sizeof(*cp), 1, 0);
1332                print_cmd(cp); */
1333                /* We get CMD_INVALID if you address a non-existent device
1334                 * instead of a selection timeout (no response).  You will
1335                 * see this if you yank out a drive, then try to access it.
1336                 * This is kind of a shame because it means that any other
1337                 * CMD_INVALID (e.g. driver bug) will get interpreted as a
1338                 * missing target. */
1339                cmd->result = DID_NO_CONNECT << 16;
1340        }
1341                break;
1342        case CMD_PROTOCOL_ERR:
1343                cmd->result = DID_ERROR << 16;
1344                dev_warn(&h->pdev->dev, "cp %p has "
1345                        "protocol error\n", cp);
1346                break;
1347        case CMD_HARDWARE_ERR:
1348                cmd->result = DID_ERROR << 16;
1349                dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1350                break;
1351        case CMD_CONNECTION_LOST:
1352                cmd->result = DID_ERROR << 16;
1353                dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1354                break;
1355        case CMD_ABORTED:
1356                cmd->result = DID_ABORT << 16;
1357                dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1358                                cp, ei->ScsiStatus);
1359                break;
1360        case CMD_ABORT_FAILED:
1361                cmd->result = DID_ERROR << 16;
1362                dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1363                break;
1364        case CMD_UNSOLICITED_ABORT:
1365                cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
1366                dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited "
1367                        "abort\n", cp);
1368                break;
1369        case CMD_TIMEOUT:
1370                cmd->result = DID_TIME_OUT << 16;
1371                dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1372                break;
1373        case CMD_UNABORTABLE:
1374                cmd->result = DID_ERROR << 16;
1375                dev_warn(&h->pdev->dev, "Command unabortable\n");
1376                break;
1377        default:
1378                cmd->result = DID_ERROR << 16;
1379                dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1380                                cp, ei->CommandStatus);
1381        }
1382        cmd->scsi_done(cmd);
1383        cmd_free(h, cp);
1384}
1385
1386static void hpsa_pci_unmap(struct pci_dev *pdev,
1387        struct CommandList *c, int sg_used, int data_direction)
1388{
1389        int i;
1390        union u64bit addr64;
1391
1392        for (i = 0; i < sg_used; i++) {
1393                addr64.val32.lower = c->SG[i].Addr.lower;
1394                addr64.val32.upper = c->SG[i].Addr.upper;
1395                pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1396                        data_direction);
1397        }
1398}
1399
1400static int hpsa_map_one(struct pci_dev *pdev,
1401                struct CommandList *cp,
1402                unsigned char *buf,
1403                size_t buflen,
1404                int data_direction)
1405{
1406        u64 addr64;
1407
1408        if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1409                cp->Header.SGList = 0;
1410                cp->Header.SGTotal = 0;
1411                return 0;
1412        }
1413
1414        addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1415        if (dma_mapping_error(&pdev->dev, addr64)) {
1416                /* Prevent subsequent unmap of something never mapped */
1417                cp->Header.SGList = 0;
1418                cp->Header.SGTotal = 0;
1419                return -1;
1420        }
1421        cp->SG[0].Addr.lower =
1422          (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1423        cp->SG[0].Addr.upper =
1424          (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1425        cp->SG[0].Len = buflen;
1426        cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1427        cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1428        return 0;
1429}
1430
1431static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1432        struct CommandList *c)
1433{
1434        DECLARE_COMPLETION_ONSTACK(wait);
1435
1436        c->waiting = &wait;
1437        enqueue_cmd_and_start_io(h, c);
1438        wait_for_completion(&wait);
1439}
1440
1441static void hpsa_scsi_do_simple_cmd_core_if_no_lockup(struct ctlr_info *h,
1442        struct CommandList *c)
1443{
1444        unsigned long flags;
1445
1446        /* If controller lockup detected, fake a hardware error. */
1447        spin_lock_irqsave(&h->lock, flags);
1448        if (unlikely(h->lockup_detected)) {
1449                spin_unlock_irqrestore(&h->lock, flags);
1450                c->err_info->CommandStatus = CMD_HARDWARE_ERR;
1451        } else {
1452                spin_unlock_irqrestore(&h->lock, flags);
1453                hpsa_scsi_do_simple_cmd_core(h, c);
1454        }
1455}
1456
1457#define MAX_DRIVER_CMD_RETRIES 25
1458static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1459        struct CommandList *c, int data_direction)
1460{
1461        int backoff_time = 10, retry_count = 0;
1462
1463        do {
1464                memset(c->err_info, 0, sizeof(*c->err_info));
1465                hpsa_scsi_do_simple_cmd_core(h, c);
1466                retry_count++;
1467                if (retry_count > 3) {
1468                        msleep(backoff_time);
1469                        if (backoff_time < 1000)
1470                                backoff_time *= 2;
1471                }
1472        } while ((check_for_unit_attention(h, c) ||
1473                        check_for_busy(h, c)) &&
1474                        retry_count <= MAX_DRIVER_CMD_RETRIES);
1475        hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1476}
1477
1478static void hpsa_scsi_interpret_error(struct CommandList *cp)
1479{
1480        struct ErrorInfo *ei;
1481        struct device *d = &cp->h->pdev->dev;
1482
1483        ei = cp->err_info;
1484        switch (ei->CommandStatus) {
1485        case CMD_TARGET_STATUS:
1486                dev_warn(d, "cmd %p has completed with errors\n", cp);
1487                dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1488                                ei->ScsiStatus);
1489                if (ei->ScsiStatus == 0)
1490                        dev_warn(d, "SCSI status is abnormally zero.  "
1491                        "(probably indicates selection timeout "
1492                        "reported incorrectly due to a known "
1493                        "firmware bug, circa July, 2001.)\n");
1494                break;
1495        case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1496                        dev_info(d, "UNDERRUN\n");
1497                break;
1498        case CMD_DATA_OVERRUN:
1499                dev_warn(d, "cp %p has completed with data overrun\n", cp);
1500                break;
1501        case CMD_INVALID: {
1502                /* controller unfortunately reports SCSI passthru's
1503                 * to non-existent targets as invalid commands.
1504                 */
1505                dev_warn(d, "cp %p is reported invalid (probably means "
1506                        "target device no longer present)\n", cp);
1507                /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1508                print_cmd(cp);  */
1509                }
1510                break;
1511        case CMD_PROTOCOL_ERR:
1512                dev_warn(d, "cp %p has protocol error \n", cp);
1513                break;
1514        case CMD_HARDWARE_ERR:
1515                /* cmd->result = DID_ERROR << 16; */
1516                dev_warn(d, "cp %p had hardware error\n", cp);
1517                break;
1518        case CMD_CONNECTION_LOST:
1519                dev_warn(d, "cp %p had connection lost\n", cp);
1520                break;
1521        case CMD_ABORTED:
1522                dev_warn(d, "cp %p was aborted\n", cp);
1523                break;
1524        case CMD_ABORT_FAILED:
1525                dev_warn(d, "cp %p reports abort failed\n", cp);
1526                break;
1527        case CMD_UNSOLICITED_ABORT:
1528                dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1529                break;
1530        case CMD_TIMEOUT:
1531                dev_warn(d, "cp %p timed out\n", cp);
1532                break;
1533        case CMD_UNABORTABLE:
1534                dev_warn(d, "Command unabortable\n");
1535                break;
1536        default:
1537                dev_warn(d, "cp %p returned unknown status %x\n", cp,
1538                                ei->CommandStatus);
1539        }
1540}
1541
1542static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1543                        unsigned char page, unsigned char *buf,
1544                        unsigned char bufsize)
1545{
1546        int rc = IO_OK;
1547        struct CommandList *c;
1548        struct ErrorInfo *ei;
1549
1550        c = cmd_special_alloc(h);
1551
1552        if (c == NULL) {                        /* trouble... */
1553                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1554                return -ENOMEM;
1555        }
1556
1557        if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
1558                        page, scsi3addr, TYPE_CMD)) {
1559                rc = -1;
1560                goto out;
1561        }
1562        hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1563        ei = c->err_info;
1564        if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1565                hpsa_scsi_interpret_error(c);
1566                rc = -1;
1567        }
1568out:
1569        cmd_special_free(h, c);
1570        return rc;
1571}
1572
1573static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1574{
1575        int rc = IO_OK;
1576        struct CommandList *c;
1577        struct ErrorInfo *ei;
1578
1579        c = cmd_special_alloc(h);
1580
1581        if (c == NULL) {                        /* trouble... */
1582                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1583                return -ENOMEM;
1584        }
1585
1586        /* fill_cmd can't fail here, no data buffer to map. */
1587        (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h,
1588                        NULL, 0, 0, scsi3addr, TYPE_MSG);
1589        hpsa_scsi_do_simple_cmd_core(h, c);
1590        /* no unmap needed here because no data xfer. */
1591
1592        ei = c->err_info;
1593        if (ei->CommandStatus != 0) {
1594                hpsa_scsi_interpret_error(c);
1595                rc = -1;
1596        }
1597        cmd_special_free(h, c);
1598        return rc;
1599}
1600
1601static void hpsa_get_raid_level(struct ctlr_info *h,
1602        unsigned char *scsi3addr, unsigned char *raid_level)
1603{
1604        int rc;
1605        unsigned char *buf;
1606
1607        *raid_level = RAID_UNKNOWN;
1608        buf = kzalloc(64, GFP_KERNEL);
1609        if (!buf)
1610                return;
1611        rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1612        if (rc == 0)
1613                *raid_level = buf[8];
1614        if (*raid_level > RAID_UNKNOWN)
1615                *raid_level = RAID_UNKNOWN;
1616        kfree(buf);
1617        return;
1618}
1619
1620/* Get the device id from inquiry page 0x83 */
1621static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1622        unsigned char *device_id, int buflen)
1623{
1624        int rc;
1625        unsigned char *buf;
1626
1627        if (buflen > 16)
1628                buflen = 16;
1629        buf = kzalloc(64, GFP_KERNEL);
1630        if (!buf)
1631                return -1;
1632        rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1633        if (rc == 0)
1634                memcpy(device_id, &buf[8], buflen);
1635        kfree(buf);
1636        return rc != 0;
1637}
1638
1639static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1640                struct ReportLUNdata *buf, int bufsize,
1641                int extended_response)
1642{
1643        int rc = IO_OK;
1644        struct CommandList *c;
1645        unsigned char scsi3addr[8];
1646        struct ErrorInfo *ei;
1647
1648        c = cmd_special_alloc(h);
1649        if (c == NULL) {                        /* trouble... */
1650                dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1651                return -1;
1652        }
1653        /* address the controller */
1654        memset(scsi3addr, 0, sizeof(scsi3addr));
1655        if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1656                buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
1657                rc = -1;
1658                goto out;
1659        }
1660        if (extended_response)
1661                c->Request.CDB[1] = extended_response;
1662        hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1663        ei = c->err_info;
1664        if (ei->CommandStatus != 0 &&
1665            ei->CommandStatus != CMD_DATA_UNDERRUN) {
1666                hpsa_scsi_interpret_error(c);
1667                rc = -1;
1668        }
1669out:
1670        cmd_special_free(h, c);
1671        return rc;
1672}
1673
1674static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1675                struct ReportLUNdata *buf,
1676                int bufsize, int extended_response)
1677{
1678        return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1679}
1680
1681static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1682                struct ReportLUNdata *buf, int bufsize)
1683{
1684        return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1685}
1686
1687static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1688        int bus, int target, int lun)
1689{
1690        device->bus = bus;
1691        device->target = target;
1692        device->lun = lun;
1693}
1694
1695static int hpsa_update_device_info(struct ctlr_info *h,
1696        unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
1697        unsigned char *is_OBDR_device)
1698{
1699
1700#define OBDR_SIG_OFFSET 43
1701#define OBDR_TAPE_SIG "$DR-10"
1702#define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
1703#define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
1704
1705        unsigned char *inq_buff;
1706        unsigned char *obdr_sig;
1707
1708        inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1709        if (!inq_buff)
1710                goto bail_out;
1711
1712        /* Do an inquiry to the device to see what it is. */
1713        if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1714                (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1715                /* Inquiry failed (msg printed already) */
1716                dev_err(&h->pdev->dev,
1717                        "hpsa_update_device_info: inquiry failed\n");
1718                goto bail_out;
1719        }
1720
1721        this_device->devtype = (inq_buff[0] & 0x1f);
1722        memcpy(this_device->scsi3addr, scsi3addr, 8);
1723        memcpy(this_device->vendor, &inq_buff[8],
1724                sizeof(this_device->vendor));
1725        memcpy(this_device->model, &inq_buff[16],
1726                sizeof(this_device->model));
1727        memset(this_device->device_id, 0,
1728                sizeof(this_device->device_id));
1729        hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1730                sizeof(this_device->device_id));
1731
1732        if (this_device->devtype == TYPE_DISK &&
1733                is_logical_dev_addr_mode(scsi3addr))
1734                hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1735        else
1736                this_device->raid_level = RAID_UNKNOWN;
1737
1738        if (is_OBDR_device) {
1739                /* See if this is a One-Button-Disaster-Recovery device
1740                 * by looking for "$DR-10" at offset 43 in inquiry data.
1741                 */
1742                obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
1743                *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
1744                                        strncmp(obdr_sig, OBDR_TAPE_SIG,
1745                                                OBDR_SIG_LEN) == 0);
1746        }
1747
1748        kfree(inq_buff);
1749        return 0;
1750
1751bail_out:
1752        kfree(inq_buff);
1753        return 1;
1754}
1755
1756static unsigned char *ext_target_model[] = {
1757        "MSA2012",
1758        "MSA2024",
1759        "MSA2312",
1760        "MSA2324",
1761        "P2000 G3 SAS",
1762        NULL,
1763};
1764
1765static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1766{
1767        int i;
1768
1769        for (i = 0; ext_target_model[i]; i++)
1770                if (strncmp(device->model, ext_target_model[i],
1771                        strlen(ext_target_model[i])) == 0)
1772                        return 1;
1773        return 0;
1774}
1775
1776/* Helper function to assign bus, target, lun mapping of devices.
1777 * Puts non-external target logical volumes on bus 0, external target logical
1778 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1779 * Logical drive target and lun are assigned at this time, but
1780 * physical device lun and target assignment are deferred (assigned
1781 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1782 */
1783static void figure_bus_target_lun(struct ctlr_info *h,
1784        u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
1785{
1786        u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1787
1788        if (!is_logical_dev_addr_mode(lunaddrbytes)) {
1789                /* physical device, target and lun filled in later */
1790                if (is_hba_lunid(lunaddrbytes))
1791                        hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff);
1792                else
1793                        /* defer target, lun assignment for physical devices */
1794                        hpsa_set_bus_target_lun(device, 2, -1, -1);
1795                return;
1796        }
1797        /* It's a logical device */
1798        if (is_ext_target(h, device)) {
1799                /* external target way, put logicals on bus 1
1800                 * and match target/lun numbers box
1801                 * reports, other smart array, bus 0, target 0, match lunid
1802                 */
1803                hpsa_set_bus_target_lun(device,
1804                        1, (lunid >> 16) & 0x3fff, lunid & 0x00ff);
1805                return;
1806        }
1807        hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff);
1808}
1809
1810/*
1811 * If there is no lun 0 on a target, linux won't find any devices.
1812 * For the external targets (arrays), we have to manually detect the enclosure
1813 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1814 * it for some reason.  *tmpdevice is the target we're adding,
1815 * this_device is a pointer into the current element of currentsd[]
1816 * that we're building up in update_scsi_devices(), below.
1817 * lunzerobits is a bitmap that tracks which targets already have a
1818 * lun 0 assigned.
1819 * Returns 1 if an enclosure was added, 0 if not.
1820 */
1821static int add_ext_target_dev(struct ctlr_info *h,
1822        struct hpsa_scsi_dev_t *tmpdevice,
1823        struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1824        unsigned long lunzerobits[], int *n_ext_target_devs)
1825{
1826        unsigned char scsi3addr[8];
1827
1828        if (test_bit(tmpdevice->target, lunzerobits))
1829                return 0; /* There is already a lun 0 on this target. */
1830
1831        if (!is_logical_dev_addr_mode(lunaddrbytes))
1832                return 0; /* It's the logical targets that may lack lun 0. */
1833
1834        if (!is_ext_target(h, tmpdevice))
1835                return 0; /* Only external target devices have this problem. */
1836
1837        if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
1838                return 0;
1839
1840        memset(scsi3addr, 0, 8);
1841        scsi3addr[3] = tmpdevice->target;
1842        if (is_hba_lunid(scsi3addr))
1843                return 0; /* Don't add the RAID controller here. */
1844
1845        if (is_scsi_rev_5(h))
1846                return 0; /* p1210m doesn't need to do this. */
1847
1848        if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
1849                dev_warn(&h->pdev->dev, "Maximum number of external "
1850                        "target devices exceeded.  Check your hardware "
1851                        "configuration.");
1852                return 0;
1853        }
1854
1855        if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1856                return 0;
1857        (*n_ext_target_devs)++;
1858        hpsa_set_bus_target_lun(this_device,
1859                                tmpdevice->bus, tmpdevice->target, 0);
1860        set_bit(tmpdevice->target, lunzerobits);
1861        return 1;
1862}
1863
1864/*
1865 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1866 * logdev.  The number of luns in physdev and logdev are returned in
1867 * *nphysicals and *nlogicals, respectively.
1868 * Returns 0 on success, -1 otherwise.
1869 */
1870static int hpsa_gather_lun_info(struct ctlr_info *h,
1871        int reportlunsize,
1872        struct ReportLUNdata *physdev, u32 *nphysicals,
1873        struct ReportLUNdata *logdev, u32 *nlogicals)
1874{
1875        if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1876                dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1877                return -1;
1878        }
1879        *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1880        if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1881                dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1882                        "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1883                        *nphysicals - HPSA_MAX_PHYS_LUN);
1884                *nphysicals = HPSA_MAX_PHYS_LUN;
1885        }
1886        if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1887                dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1888                return -1;
1889        }
1890        *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1891        /* Reject Logicals in excess of our max capability. */
1892        if (*nlogicals > HPSA_MAX_LUN) {
1893                dev_warn(&h->pdev->dev,
1894                        "maximum logical LUNs (%d) exceeded.  "
1895                        "%d LUNs ignored.\n", HPSA_MAX_LUN,
1896                        *nlogicals - HPSA_MAX_LUN);
1897                        *nlogicals = HPSA_MAX_LUN;
1898        }
1899        if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1900                dev_warn(&h->pdev->dev,
1901                        "maximum logical + physical LUNs (%d) exceeded. "
1902                        "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1903                        *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1904                *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1905        }
1906        return 0;
1907}
1908
1909u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1910        int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1911        struct ReportLUNdata *logdev_list)
1912{
1913        /* Helper function, figure out where the LUN ID info is coming from
1914         * given index i, lists of physical and logical devices, where in
1915         * the list the raid controller is supposed to appear (first or last)
1916         */
1917
1918        int logicals_start = nphysicals + (raid_ctlr_position == 0);
1919        int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1920
1921        if (i == raid_ctlr_position)
1922                return RAID_CTLR_LUNID;
1923
1924        if (i < logicals_start)
1925                return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1926
1927        if (i < last_device)
1928                return &logdev_list->LUN[i - nphysicals -
1929                        (raid_ctlr_position == 0)][0];
1930        BUG();
1931        return NULL;
1932}
1933
1934static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1935{
1936        /* the idea here is we could get notified
1937         * that some devices have changed, so we do a report
1938         * physical luns and report logical luns cmd, and adjust
1939         * our list of devices accordingly.
1940         *
1941         * The scsi3addr's of devices won't change so long as the
1942         * adapter is not reset.  That means we can rescan and
1943         * tell which devices we already know about, vs. new
1944         * devices, vs.  disappearing devices.
1945         */
1946        struct ReportLUNdata *physdev_list = NULL;
1947        struct ReportLUNdata *logdev_list = NULL;
1948        u32 nphysicals = 0;
1949        u32 nlogicals = 0;
1950        u32 ndev_allocated = 0;
1951        struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1952        int ncurrent = 0;
1953        int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1954        int i, n_ext_target_devs, ndevs_to_allocate;
1955        int raid_ctlr_position;
1956        DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
1957
1958        currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
1959        physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1960        logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1961        tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1962
1963        if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1964                dev_err(&h->pdev->dev, "out of memory\n");
1965                goto out;
1966        }
1967        memset(lunzerobits, 0, sizeof(lunzerobits));
1968
1969        if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1970                        logdev_list, &nlogicals))
1971                goto out;
1972
1973        /* We might see up to the maximum number of logical and physical disks
1974         * plus external target devices, and a device for the local RAID
1975         * controller.
1976         */
1977        ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
1978
1979        /* Allocate the per device structures */
1980        for (i = 0; i < ndevs_to_allocate; i++) {
1981                if (i >= HPSA_MAX_DEVICES) {
1982                        dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
1983                                "  %d devices ignored.\n", HPSA_MAX_DEVICES,
1984                                ndevs_to_allocate - HPSA_MAX_DEVICES);
1985                        break;
1986                }
1987
1988                currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1989                if (!currentsd[i]) {
1990                        dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1991                                __FILE__, __LINE__);
1992                        goto out;
1993                }
1994                ndev_allocated++;
1995        }
1996
1997        if (unlikely(is_scsi_rev_5(h)))
1998                raid_ctlr_position = 0;
1999        else
2000                raid_ctlr_position = nphysicals + nlogicals;
2001
2002        /* adjust our table of devices */
2003        n_ext_target_devs = 0;
2004        for (i = 0; i < nphysicals + nlogicals + 1; i++) {
2005                u8 *lunaddrbytes, is_OBDR = 0;
2006
2007                /* Figure out where the LUN ID info is coming from */
2008                lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
2009                        i, nphysicals, nlogicals, physdev_list, logdev_list);
2010                /* skip masked physical devices. */
2011                if (lunaddrbytes[3] & 0xC0 &&
2012                        i < nphysicals + (raid_ctlr_position == 0))
2013                        continue;
2014
2015                /* Get device type, vendor, model, device id */
2016                if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
2017                                                        &is_OBDR))
2018                        continue; /* skip it if we can't talk to it. */
2019                figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
2020                this_device = currentsd[ncurrent];
2021
2022                /*
2023                 * For external target devices, we have to insert a LUN 0 which
2024                 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
2025                 * is nonetheless an enclosure device there.  We have to
2026                 * present that otherwise linux won't find anything if
2027                 * there is no lun 0.
2028                 */
2029                if (add_ext_target_dev(h, tmpdevice, this_device,
2030                                lunaddrbytes, lunzerobits,
2031                                &n_ext_target_devs)) {
2032                        ncurrent++;
2033                        this_device = currentsd[ncurrent];
2034                }
2035
2036                *this_device = *tmpdevice;
2037
2038                switch (this_device->devtype) {
2039                case TYPE_ROM:
2040                        /* We don't *really* support actual CD-ROM devices,
2041                         * just "One Button Disaster Recovery" tape drive
2042                         * which temporarily pretends to be a CD-ROM drive.
2043                         * So we check that the device is really an OBDR tape
2044                         * device by checking for "$DR-10" in bytes 43-48 of
2045                         * the inquiry data.
2046                         */
2047                        if (is_OBDR)
2048                                ncurrent++;
2049                        break;
2050                case TYPE_DISK:
2051                        if (i < nphysicals)
2052                                break;
2053                        ncurrent++;
2054                        break;
2055                case TYPE_TAPE:
2056                case TYPE_MEDIUM_CHANGER:
2057                        ncurrent++;
2058                        break;
2059                case TYPE_RAID:
2060                        /* Only present the Smartarray HBA as a RAID controller.
2061                         * If it's a RAID controller other than the HBA itself
2062                         * (an external RAID controller, MSA500 or similar)
2063                         * don't present it.
2064                         */
2065                        if (!is_hba_lunid(lunaddrbytes))
2066                                break;
2067                        ncurrent++;
2068                        break;
2069                default:
2070                        break;
2071                }
2072                if (ncurrent >= HPSA_MAX_DEVICES)
2073                        break;
2074        }
2075        adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
2076out:
2077        kfree(tmpdevice);
2078        for (i = 0; i < ndev_allocated; i++)
2079                kfree(currentsd[i]);
2080        kfree(currentsd);
2081        kfree(physdev_list);
2082        kfree(logdev_list);
2083}
2084
2085/* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
2086 * dma mapping  and fills in the scatter gather entries of the
2087 * hpsa command, cp.
2088 */
2089static int hpsa_scatter_gather(struct ctlr_info *h,
2090                struct CommandList *cp,
2091                struct scsi_cmnd *cmd)
2092{
2093        unsigned int len;
2094        struct scatterlist *sg;
2095        u64 addr64;
2096        int use_sg, i, sg_index, chained;
2097        struct SGDescriptor *curr_sg;
2098
2099        BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
2100
2101        use_sg = scsi_dma_map(cmd);
2102        if (use_sg < 0)
2103                return use_sg;
2104
2105        if (!use_sg)
2106                goto sglist_finished;
2107
2108        curr_sg = cp->SG;
2109        chained = 0;
2110        sg_index = 0;
2111        scsi_for_each_sg(cmd, sg, use_sg, i) {
2112                if (i == h->max_cmd_sg_entries - 1 &&
2113                        use_sg > h->max_cmd_sg_entries) {
2114                        chained = 1;
2115                        curr_sg = h->cmd_sg_list[cp->cmdindex];
2116                        sg_index = 0;
2117                }
2118                addr64 = (u64) sg_dma_address(sg);
2119                len  = sg_dma_len(sg);
2120                curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
2121                curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
2122                curr_sg->Len = len;
2123                curr_sg->Ext = 0;  /* we are not chaining */
2124                curr_sg++;
2125        }
2126
2127        if (use_sg + chained > h->maxSG)
2128                h->maxSG = use_sg + chained;
2129
2130        if (chained) {
2131                cp->Header.SGList = h->max_cmd_sg_entries;
2132                cp->Header.SGTotal = (u16) (use_sg + 1);
2133                if (hpsa_map_sg_chain_block(h, cp)) {
2134                        scsi_dma_unmap(cmd);
2135                        return -1;
2136                }
2137                return 0;
2138        }
2139
2140sglist_finished:
2141
2142        cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
2143        cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2144        return 0;
2145}
2146
2147
2148static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2149        void (*done)(struct scsi_cmnd *))
2150{
2151        struct ctlr_info *h;
2152        struct hpsa_scsi_dev_t *dev;
2153        unsigned char scsi3addr[8];
2154        struct CommandList *c;
2155        unsigned long flags;
2156
2157        /* Get the ptr to our adapter structure out of cmd->host. */
2158        h = sdev_to_hba(cmd->device);
2159        dev = cmd->device->hostdata;
2160        if (!dev) {
2161                cmd->result = DID_NO_CONNECT << 16;
2162                done(cmd);
2163                return 0;
2164        }
2165        memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
2166
2167        spin_lock_irqsave(&h->lock, flags);
2168        if (unlikely(h->lockup_detected)) {
2169                spin_unlock_irqrestore(&h->lock, flags);
2170                cmd->result = DID_ERROR << 16;
2171                done(cmd);
2172                return 0;
2173        }
2174        spin_unlock_irqrestore(&h->lock, flags);
2175        c = cmd_alloc(h);
2176        if (c == NULL) {                        /* trouble... */
2177                dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2178                return SCSI_MLQUEUE_HOST_BUSY;
2179        }
2180
2181        /* Fill in the command list header */
2182
2183        cmd->scsi_done = done;    /* save this for use by completion code */
2184
2185        /* save c in case we have to abort it  */
2186        cmd->host_scribble = (unsigned char *) c;
2187
2188        c->cmd_type = CMD_SCSI;
2189        c->scsi_cmd = cmd;
2190        c->Header.ReplyQueue = 0;  /* unused in simple mode */
2191        memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
2192        c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
2193        c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2194
2195        /* Fill in the request block... */
2196
2197        c->Request.Timeout = 0;
2198        memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
2199        BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
2200        c->Request.CDBLen = cmd->cmd_len;
2201        memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
2202        c->Request.Type.Type = TYPE_CMD;
2203        c->Request.Type.Attribute = ATTR_SIMPLE;
2204        switch (cmd->sc_data_direction) {
2205        case DMA_TO_DEVICE:
2206                c->Request.Type.Direction = XFER_WRITE;
2207                break;
2208        case DMA_FROM_DEVICE:
2209                c->Request.Type.Direction = XFER_READ;
2210                break;
2211        case DMA_NONE:
2212                c->Request.Type.Direction = XFER_NONE;
2213                break;
2214        case DMA_BIDIRECTIONAL:
2215                /* This can happen if a buggy application does a scsi passthru
2216                 * and sets both inlen and outlen to non-zero. ( see
2217                 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2218                 */
2219
2220                c->Request.Type.Direction = XFER_RSVD;
2221                /* This is technically wrong, and hpsa controllers should
2222                 * reject it with CMD_INVALID, which is the most correct
2223                 * response, but non-fibre backends appear to let it
2224                 * slide by, and give the same results as if this field
2225                 * were set correctly.  Either way is acceptable for
2226                 * our purposes here.
2227                 */
2228
2229                break;
2230
2231        default:
2232                dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2233                        cmd->sc_data_direction);
2234                BUG();
2235                break;
2236        }
2237
2238        if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2239                cmd_free(h, c);
2240                return SCSI_MLQUEUE_HOST_BUSY;
2241        }
2242        enqueue_cmd_and_start_io(h, c);
2243        /* the cmd'll come back via intr handler in complete_scsi_command()  */
2244        return 0;
2245}
2246
2247static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2248
2249static void hpsa_scan_start(struct Scsi_Host *sh)
2250{
2251        struct ctlr_info *h = shost_to_hba(sh);
2252        unsigned long flags;
2253
2254        /* wait until any scan already in progress is finished. */
2255        while (1) {
2256                spin_lock_irqsave(&h->scan_lock, flags);
2257                if (h->scan_finished)
2258                        break;
2259                spin_unlock_irqrestore(&h->scan_lock, flags);
2260                wait_event(h->scan_wait_queue, h->scan_finished);
2261                /* Note: We don't need to worry about a race between this
2262                 * thread and driver unload because the midlayer will
2263                 * have incremented the reference count, so unload won't
2264                 * happen if we're in here.
2265                 */
2266        }
2267        h->scan_finished = 0; /* mark scan as in progress */
2268        spin_unlock_irqrestore(&h->scan_lock, flags);
2269
2270        hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2271
2272        spin_lock_irqsave(&h->scan_lock, flags);
2273        h->scan_finished = 1; /* mark scan as finished. */
2274        wake_up_all(&h->scan_wait_queue);
2275        spin_unlock_irqrestore(&h->scan_lock, flags);
2276}
2277
2278static int hpsa_scan_finished(struct Scsi_Host *sh,
2279        unsigned long elapsed_time)
2280{
2281        struct ctlr_info *h = shost_to_hba(sh);
2282        unsigned long flags;
2283        int finished;
2284
2285        spin_lock_irqsave(&h->scan_lock, flags);
2286        finished = h->scan_finished;
2287        spin_unlock_irqrestore(&h->scan_lock, flags);
2288        return finished;
2289}
2290
2291static int hpsa_change_queue_depth(struct scsi_device *sdev,
2292        int qdepth, int reason)
2293{
2294        struct ctlr_info *h = sdev_to_hba(sdev);
2295
2296        if (reason != SCSI_QDEPTH_DEFAULT)
2297                return -ENOTSUPP;
2298
2299        if (qdepth < 1)
2300                qdepth = 1;
2301        else
2302                if (qdepth > h->nr_cmds)
2303                        qdepth = h->nr_cmds;
2304        scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2305        return sdev->queue_depth;
2306}
2307
2308static void hpsa_unregister_scsi(struct ctlr_info *h)
2309{
2310        /* we are being forcibly unloaded, and may not refuse. */
2311        scsi_remove_host(h->scsi_host);
2312        scsi_host_put(h->scsi_host);
2313        h->scsi_host = NULL;
2314}
2315
2316static int hpsa_register_scsi(struct ctlr_info *h)
2317{
2318        struct Scsi_Host *sh;
2319        int error;
2320
2321        sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
2322        if (sh == NULL)
2323                goto fail;
2324
2325        sh->io_port = 0;
2326        sh->n_io_port = 0;
2327        sh->this_id = -1;
2328        sh->max_channel = 3;
2329        sh->max_cmd_len = MAX_COMMAND_SIZE;
2330        sh->max_lun = HPSA_MAX_LUN;
2331        sh->max_id = HPSA_MAX_LUN;
2332        sh->can_queue = h->nr_cmds;
2333        sh->cmd_per_lun = h->nr_cmds;
2334        sh->sg_tablesize = h->maxsgentries;
2335        h->scsi_host = sh;
2336        sh->hostdata[0] = (unsigned long) h;
2337        sh->irq = h->intr[h->intr_mode];
2338        sh->unique_id = sh->irq;
2339        error = scsi_add_host(sh, &h->pdev->dev);
2340        if (error)
2341                goto fail_host_put;
2342        scsi_scan_host(sh);
2343        return 0;
2344
2345 fail_host_put:
2346        dev_err(&h->pdev->dev, "%s: scsi_add_host"
2347                " failed for controller %d\n", __func__, h->ctlr);
2348        scsi_host_put(sh);
2349        return error;
2350 fail:
2351        dev_err(&h->pdev->dev, "%s: scsi_host_alloc"
2352                " failed for controller %d\n", __func__, h->ctlr);
2353        return -ENOMEM;
2354}
2355
2356static int wait_for_device_to_become_ready(struct ctlr_info *h,
2357        unsigned char lunaddr[])
2358{
2359        int rc = 0;
2360        int count = 0;
2361        int waittime = 1; /* seconds */
2362        struct CommandList *c;
2363
2364        c = cmd_special_alloc(h);
2365        if (!c) {
2366                dev_warn(&h->pdev->dev, "out of memory in "
2367                        "wait_for_device_to_become_ready.\n");
2368                return IO_ERROR;
2369        }
2370
2371        /* Send test unit ready until device ready, or give up. */
2372        while (count < HPSA_TUR_RETRY_LIMIT) {
2373
2374                /* Wait for a bit.  do this first, because if we send
2375                 * the TUR right away, the reset will just abort it.
2376                 */
2377                msleep(1000 * waittime);
2378                count++;
2379
2380                /* Increase wait time with each try, up to a point. */
2381                if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2382                        waittime = waittime * 2;
2383
2384                /* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
2385                (void) fill_cmd(c, TEST_UNIT_READY, h,
2386                                NULL, 0, 0, lunaddr, TYPE_CMD);
2387                hpsa_scsi_do_simple_cmd_core(h, c);
2388                /* no unmap needed here because no data xfer. */
2389
2390                if (c->err_info->CommandStatus == CMD_SUCCESS)
2391                        break;
2392
2393                if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2394                        c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2395                        (c->err_info->SenseInfo[2] == NO_SENSE ||
2396                        c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2397                        break;
2398
2399                dev_warn(&h->pdev->dev, "waiting %d secs "
2400                        "for device to become ready.\n", waittime);
2401                rc = 1; /* device not ready. */
2402        }
2403
2404        if (rc)
2405                dev_warn(&h->pdev->dev, "giving up on device.\n");
2406        else
2407                dev_warn(&h->pdev->dev, "device is ready.\n");
2408
2409        cmd_special_free(h, c);
2410        return rc;
2411}
2412
2413/* Need at least one of these error handlers to keep ../scsi/hosts.c from
2414 * complaining.  Doing a host- or bus-reset can't do anything good here.
2415 */
2416static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2417{
2418        int rc;
2419        struct ctlr_info *h;
2420        struct hpsa_scsi_dev_t *dev;
2421
2422        /* find the controller to which the command to be aborted was sent */
2423        h = sdev_to_hba(scsicmd->device);
2424        if (h == NULL) /* paranoia */
2425                return FAILED;
2426        dev = scsicmd->device->hostdata;
2427        if (!dev) {
2428                dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2429                        "device lookup failed.\n");
2430                return FAILED;
2431        }
2432        dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2433                h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2434        /* send a reset to the SCSI LUN which the command was sent to */
2435        rc = hpsa_send_reset(h, dev->scsi3addr);
2436        if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2437                return SUCCESS;
2438
2439        dev_warn(&h->pdev->dev, "resetting device failed.\n");
2440        return FAILED;
2441}
2442
2443static void swizzle_abort_tag(u8 *tag)
2444{
2445        u8 original_tag[8];
2446
2447        memcpy(original_tag, tag, 8);
2448        tag[0] = original_tag[3];
2449        tag[1] = original_tag[2];
2450        tag[2] = original_tag[1];
2451        tag[3] = original_tag[0];
2452        tag[4] = original_tag[7];
2453        tag[5] = original_tag[6];
2454        tag[6] = original_tag[5];
2455        tag[7] = original_tag[4];
2456}
2457
2458static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
2459        struct CommandList *abort, int swizzle)
2460{
2461        int rc = IO_OK;
2462        struct CommandList *c;
2463        struct ErrorInfo *ei;
2464
2465        c = cmd_special_alloc(h);
2466        if (c == NULL) {        /* trouble... */
2467                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
2468                return -ENOMEM;
2469        }
2470
2471        /* fill_cmd can't fail here, no buffer to map */
2472        (void) fill_cmd(c, HPSA_ABORT_MSG, h, abort,
2473                0, 0, scsi3addr, TYPE_MSG);
2474        if (swizzle)
2475                swizzle_abort_tag(&c->Request.CDB[4]);
2476        hpsa_scsi_do_simple_cmd_core(h, c);
2477        dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd_core completed.\n",
2478                __func__, abort->Header.Tag.upper, abort->Header.Tag.lower);
2479        /* no unmap needed here because no data xfer. */
2480
2481        ei = c->err_info;
2482        switch (ei->CommandStatus) {
2483        case CMD_SUCCESS:
2484                break;
2485        case CMD_UNABORTABLE: /* Very common, don't make noise. */
2486                rc = -1;
2487                break;
2488        default:
2489                dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
2490                        __func__, abort->Header.Tag.upper,
2491                        abort->Header.Tag.lower);
2492                hpsa_scsi_interpret_error(c);
2493                rc = -1;
2494                break;
2495        }
2496        cmd_special_free(h, c);
2497        dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
2498                abort->Header.Tag.upper, abort->Header.Tag.lower);
2499        return rc;
2500}
2501
2502/*
2503 * hpsa_find_cmd_in_queue
2504 *
2505 * Used to determine whether a command (find) is still present
2506 * in queue_head.   Optionally excludes the last element of queue_head.
2507 *
2508 * This is used to avoid unnecessary aborts.  Commands in h->reqQ have
2509 * not yet been submitted, and so can be aborted by the driver without
2510 * sending an abort to the hardware.
2511 *
2512 * Returns pointer to command if found in queue, NULL otherwise.
2513 */
2514static struct CommandList *hpsa_find_cmd_in_queue(struct ctlr_info *h,
2515                        struct scsi_cmnd *find, struct list_head *queue_head)
2516{
2517        unsigned long flags;
2518        struct CommandList *c = NULL;   /* ptr into cmpQ */
2519
2520        if (!find)
2521                return 0;
2522        spin_lock_irqsave(&h->lock, flags);
2523        list_for_each_entry(c, queue_head, list) {
2524                if (c->scsi_cmd == NULL) /* e.g.: passthru ioctl */
2525                        continue;
2526                if (c->scsi_cmd == find) {
2527                        spin_unlock_irqrestore(&h->lock, flags);
2528                        return c;
2529                }
2530        }
2531        spin_unlock_irqrestore(&h->lock, flags);
2532        return NULL;
2533}
2534
2535static struct CommandList *hpsa_find_cmd_in_queue_by_tag(struct ctlr_info *h,
2536                                        u8 *tag, struct list_head *queue_head)
2537{
2538        unsigned long flags;
2539        struct CommandList *c;
2540
2541        spin_lock_irqsave(&h->lock, flags);
2542        list_for_each_entry(c, queue_head, list) {
2543                if (memcmp(&c->Header.Tag, tag, 8) != 0)
2544                        continue;
2545                spin_unlock_irqrestore(&h->lock, flags);
2546                return c;
2547        }
2548        spin_unlock_irqrestore(&h->lock, flags);
2549        return NULL;
2550}
2551
2552/* Some Smart Arrays need the abort tag swizzled, and some don't.  It's hard to
2553 * tell which kind we're dealing with, so we send the abort both ways.  There
2554 * shouldn't be any collisions between swizzled and unswizzled tags due to the
2555 * way we construct our tags but we check anyway in case the assumptions which
2556 * make this true someday become false.
2557 */
2558static int hpsa_send_abort_both_ways(struct ctlr_info *h,
2559        unsigned char *scsi3addr, struct CommandList *abort)
2560{
2561        u8 swizzled_tag[8];
2562        struct CommandList *c;
2563        int rc = 0, rc2 = 0;
2564
2565        /* we do not expect to find the swizzled tag in our queue, but
2566         * check anyway just to be sure the assumptions which make this
2567         * the case haven't become wrong.
2568         */
2569        memcpy(swizzled_tag, &abort->Request.CDB[4], 8);
2570        swizzle_abort_tag(swizzled_tag);
2571        c = hpsa_find_cmd_in_queue_by_tag(h, swizzled_tag, &h->cmpQ);
2572        if (c != NULL) {
2573                dev_warn(&h->pdev->dev, "Unexpectedly found byte-swapped tag in completion queue.\n");
2574                return hpsa_send_abort(h, scsi3addr, abort, 0);
2575        }
2576        rc = hpsa_send_abort(h, scsi3addr, abort, 0);
2577
2578        /* if the command is still in our queue, we can't conclude that it was
2579         * aborted (it might have just completed normally) but in any case
2580         * we don't need to try to abort it another way.
2581         */
2582        c = hpsa_find_cmd_in_queue(h, abort->scsi_cmd, &h->cmpQ);
2583        if (c)
2584                rc2 = hpsa_send_abort(h, scsi3addr, abort, 1);
2585        return rc && rc2;
2586}
2587
2588/* Send an abort for the specified command.
2589 *      If the device and controller support it,
2590 *              send a task abort request.
2591 */
2592static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
2593{
2594
2595        int i, rc;
2596        struct ctlr_info *h;
2597        struct hpsa_scsi_dev_t *dev;
2598        struct CommandList *abort; /* pointer to command to be aborted */
2599        struct CommandList *found;
2600        struct scsi_cmnd *as;   /* ptr to scsi cmd inside aborted command. */
2601        char msg[256];          /* For debug messaging. */
2602        int ml = 0;
2603
2604        /* Find the controller of the command to be aborted */
2605        h = sdev_to_hba(sc->device);
2606        if (WARN(h == NULL,
2607                        "ABORT REQUEST FAILED, Controller lookup failed.\n"))
2608                return FAILED;
2609
2610        /* Check that controller supports some kind of task abort */
2611        if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
2612                !(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
2613                return FAILED;
2614
2615        memset(msg, 0, sizeof(msg));
2616        ml += sprintf(msg+ml, "ABORT REQUEST on C%d:B%d:T%d:L%d ",
2617                h->scsi_host->host_no, sc->device->channel,
2618                sc->device->id, sc->device->lun);
2619
2620        /* Find the device of the command to be aborted */
2621        dev = sc->device->hostdata;
2622        if (!dev) {
2623                dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
2624                                msg);
2625                return FAILED;
2626        }
2627
2628        /* Get SCSI command to be aborted */
2629        abort = (struct CommandList *) sc->host_scribble;
2630        if (abort == NULL) {
2631                dev_err(&h->pdev->dev, "%s FAILED, Command to abort is NULL.\n",
2632                                msg);
2633                return FAILED;
2634        }
2635
2636        ml += sprintf(msg+ml, "Tag:0x%08x:%08x ",
2637                abort->Header.Tag.upper, abort->Header.Tag.lower);
2638        as  = (struct scsi_cmnd *) abort->scsi_cmd;
2639        if (as != NULL)
2640                ml += sprintf(msg+ml, "Command:0x%x SN:0x%lx ",
2641                        as->cmnd[0], as->serial_number);
2642        dev_dbg(&h->pdev->dev, "%s\n", msg);
2643        dev_warn(&h->pdev->dev, "Abort request on C%d:B%d:T%d:L%d\n",
2644                h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2645
2646        /* Search reqQ to See if command is queued but not submitted,
2647         * if so, complete the command with aborted status and remove
2648         * it from the reqQ.
2649         */
2650        found = hpsa_find_cmd_in_queue(h, sc, &h->reqQ);
2651        if (found) {
2652                found->err_info->CommandStatus = CMD_ABORTED;
2653                finish_cmd(found);
2654                dev_info(&h->pdev->dev, "%s Request SUCCEEDED (driver queue).\n",
2655                                msg);
2656                return SUCCESS;
2657        }
2658
2659        /* not in reqQ, if also not in cmpQ, must have already completed */
2660        found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
2661        if (!found)  {
2662                dev_dbg(&h->pdev->dev, "%s Request SUCCEEDED (not known to driver).\n",
2663                                msg);
2664                return SUCCESS;
2665        }
2666
2667        /*
2668         * Command is in flight, or possibly already completed
2669         * by the firmware (but not to the scsi mid layer) but we can't
2670         * distinguish which.  Send the abort down.
2671         */
2672        rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort);
2673        if (rc != 0) {
2674                dev_dbg(&h->pdev->dev, "%s Request FAILED.\n", msg);
2675                dev_warn(&h->pdev->dev, "FAILED abort on device C%d:B%d:T%d:L%d\n",
2676                        h->scsi_host->host_no,
2677                        dev->bus, dev->target, dev->lun);
2678                return FAILED;
2679        }
2680        dev_info(&h->pdev->dev, "%s REQUEST SUCCEEDED.\n", msg);
2681
2682        /* If the abort(s) above completed and actually aborted the
2683         * command, then the command to be aborted should already be
2684         * completed.  If not, wait around a bit more to see if they
2685         * manage to complete normally.
2686         */
2687#define ABORT_COMPLETE_WAIT_SECS 30
2688        for (i = 0; i < ABORT_COMPLETE_WAIT_SECS * 10; i++) {
2689                found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
2690                if (!found)
2691                        return SUCCESS;
2692                msleep(100);
2693        }
2694        dev_warn(&h->pdev->dev, "%s FAILED. Aborted command has not completed after %d seconds.\n",
2695                msg, ABORT_COMPLETE_WAIT_SECS);
2696        return FAILED;
2697}
2698
2699
2700/*
2701 * For operations that cannot sleep, a command block is allocated at init,
2702 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2703 * which ones are free or in use.  Lock must be held when calling this.
2704 * cmd_free() is the complement.
2705 */
2706static struct CommandList *cmd_alloc(struct ctlr_info *h)
2707{
2708        struct CommandList *c;
2709        int i;
2710        union u64bit temp64;
2711        dma_addr_t cmd_dma_handle, err_dma_handle;
2712        unsigned long flags;
2713
2714        spin_lock_irqsave(&h->lock, flags);
2715        do {
2716                i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2717                if (i == h->nr_cmds) {
2718                        spin_unlock_irqrestore(&h->lock, flags);
2719                        return NULL;
2720                }
2721        } while (test_and_set_bit
2722                 (i & (BITS_PER_LONG - 1),
2723                  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2724        h->nr_allocs++;
2725        spin_unlock_irqrestore(&h->lock, flags);
2726
2727        c = h->cmd_pool + i;
2728        memset(c, 0, sizeof(*c));
2729        cmd_dma_handle = h->cmd_pool_dhandle
2730            + i * sizeof(*c);
2731        c->err_info = h->errinfo_pool + i;
2732        memset(c->err_info, 0, sizeof(*c->err_info));
2733        err_dma_handle = h->errinfo_pool_dhandle
2734            + i * sizeof(*c->err_info);
2735
2736        c->cmdindex = i;
2737
2738        INIT_LIST_HEAD(&c->list);
2739        c->busaddr = (u32) cmd_dma_handle;
2740        temp64.val = (u64) err_dma_handle;
2741        c->ErrDesc.Addr.lower = temp64.val32.lower;
2742        c->ErrDesc.Addr.upper = temp64.val32.upper;
2743        c->ErrDesc.Len = sizeof(*c->err_info);
2744
2745        c->h = h;
2746        return c;
2747}
2748
2749/* For operations that can wait for kmalloc to possibly sleep,
2750 * this routine can be called. Lock need not be held to call
2751 * cmd_special_alloc. cmd_special_free() is the complement.
2752 */
2753static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2754{
2755        struct CommandList *c;
2756        union u64bit temp64;
2757        dma_addr_t cmd_dma_handle, err_dma_handle;
2758
2759        c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2760        if (c == NULL)
2761                return NULL;
2762        memset(c, 0, sizeof(*c));
2763
2764        c->cmdindex = -1;
2765
2766        c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2767                    &err_dma_handle);
2768
2769        if (c->err_info == NULL) {
2770                pci_free_consistent(h->pdev,
2771                        sizeof(*c), c, cmd_dma_handle);
2772                return NULL;
2773        }
2774        memset(c->err_info, 0, sizeof(*c->err_info));
2775
2776        INIT_LIST_HEAD(&c->list);
2777        c->busaddr = (u32) cmd_dma_handle;
2778        temp64.val = (u64) err_dma_handle;
2779        c->ErrDesc.Addr.lower = temp64.val32.lower;
2780        c->ErrDesc.Addr.upper = temp64.val32.upper;
2781        c->ErrDesc.Len = sizeof(*c->err_info);
2782
2783        c->h = h;
2784        return c;
2785}
2786
2787static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2788{
2789        int i;
2790        unsigned long flags;
2791
2792        i = c - h->cmd_pool;
2793        spin_lock_irqsave(&h->lock, flags);
2794        clear_bit(i & (BITS_PER_LONG - 1),
2795                  h->cmd_pool_bits + (i / BITS_PER_LONG));
2796        h->nr_frees++;
2797        spin_unlock_irqrestore(&h->lock, flags);
2798}
2799
2800static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2801{
2802        union u64bit temp64;
2803
2804        temp64.val32.lower = c->ErrDesc.Addr.lower;
2805        temp64.val32.upper = c->ErrDesc.Addr.upper;
2806        pci_free_consistent(h->pdev, sizeof(*c->err_info),
2807                            c->err_info, (dma_addr_t) temp64.val);
2808        pci_free_consistent(h->pdev, sizeof(*c),
2809                            c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2810}
2811
2812#ifdef CONFIG_COMPAT
2813
2814static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2815{
2816        IOCTL32_Command_struct __user *arg32 =
2817            (IOCTL32_Command_struct __user *) arg;
2818        IOCTL_Command_struct arg64;
2819        IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2820        int err;
2821        u32 cp;
2822
2823        memset(&arg64, 0, sizeof(arg64));
2824        err = 0;
2825        err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2826                           sizeof(arg64.LUN_info));
2827        err |= copy_from_user(&arg64.Request, &arg32->Request,
2828                           sizeof(arg64.Request));
2829        err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2830                           sizeof(arg64.error_info));
2831        err |= get_user(arg64.buf_size, &arg32->buf_size);
2832        err |= get_user(cp, &arg32->buf);
2833        arg64.buf = compat_ptr(cp);
2834        err |= copy_to_user(p, &arg64, sizeof(arg64));
2835
2836        if (err)
2837                return -EFAULT;
2838
2839        err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2840        if (err)
2841                return err;
2842        err |= copy_in_user(&arg32->error_info, &p->error_info,
2843                         sizeof(arg32->error_info));
2844        if (err)
2845                return -EFAULT;
2846        return err;
2847}
2848
2849static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2850        int cmd, void *arg)
2851{
2852        BIG_IOCTL32_Command_struct __user *arg32 =
2853            (BIG_IOCTL32_Command_struct __user *) arg;
2854        BIG_IOCTL_Command_struct arg64;
2855        BIG_IOCTL_Command_struct __user *p =
2856            compat_alloc_user_space(sizeof(arg64));
2857        int err;
2858        u32 cp;
2859
2860        memset(&arg64, 0, sizeof(arg64));
2861        err = 0;
2862        err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2863                           sizeof(arg64.LUN_info));
2864        err |= copy_from_user(&arg64.Request, &arg32->Request,
2865                           sizeof(arg64.Request));
2866        err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2867                           sizeof(arg64.error_info));
2868        err |= get_user(arg64.buf_size, &arg32->buf_size);
2869        err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2870        err |= get_user(cp, &arg32->buf);
2871        arg64.buf = compat_ptr(cp);
2872        err |= copy_to_user(p, &arg64, sizeof(arg64));
2873
2874        if (err)
2875                return -EFAULT;
2876
2877        err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2878        if (err)
2879                return err;
2880        err |= copy_in_user(&arg32->error_info, &p->error_info,
2881                         sizeof(arg32->error_info));
2882        if (err)
2883                return -EFAULT;
2884        return err;
2885}
2886
2887static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2888{
2889        switch (cmd) {
2890        case CCISS_GETPCIINFO:
2891        case CCISS_GETINTINFO:
2892        case CCISS_SETINTINFO:
2893        case CCISS_GETNODENAME:
2894        case CCISS_SETNODENAME:
2895        case CCISS_GETHEARTBEAT:
2896        case CCISS_GETBUSTYPES:
2897        case CCISS_GETFIRMVER:
2898        case CCISS_GETDRIVVER:
2899        case CCISS_REVALIDVOLS:
2900        case CCISS_DEREGDISK:
2901        case CCISS_REGNEWDISK:
2902        case CCISS_REGNEWD:
2903        case CCISS_RESCANDISK:
2904        case CCISS_GETLUNINFO:
2905                return hpsa_ioctl(dev, cmd, arg);
2906
2907        case CCISS_PASSTHRU32:
2908                return hpsa_ioctl32_passthru(dev, cmd, arg);
2909        case CCISS_BIG_PASSTHRU32:
2910                return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2911
2912        default:
2913                return -ENOIOCTLCMD;
2914        }
2915}
2916#endif
2917
2918static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2919{
2920        struct hpsa_pci_info pciinfo;
2921
2922        if (!argp)
2923                return -EINVAL;
2924        pciinfo.domain = pci_domain_nr(h->pdev->bus);
2925        pciinfo.bus = h->pdev->bus->number;
2926        pciinfo.dev_fn = h->pdev->devfn;
2927        pciinfo.board_id = h->board_id;
2928        if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2929                return -EFAULT;
2930        return 0;
2931}
2932
2933static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2934{
2935        DriverVer_type DriverVer;
2936        unsigned char vmaj, vmin, vsubmin;
2937        int rc;
2938
2939        rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2940                &vmaj, &vmin, &vsubmin);
2941        if (rc != 3) {
2942                dev_info(&h->pdev->dev, "driver version string '%s' "
2943                        "unrecognized.", HPSA_DRIVER_VERSION);
2944                vmaj = 0;
2945                vmin = 0;
2946                vsubmin = 0;
2947        }
2948        DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2949        if (!argp)
2950                return -EINVAL;
2951        if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2952                return -EFAULT;
2953        return 0;
2954}
2955
2956static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2957{
2958        IOCTL_Command_struct iocommand;
2959        struct CommandList *c;
2960        char *buff = NULL;
2961        union u64bit temp64;
2962        int rc = 0;
2963
2964        if (!argp)
2965                return -EINVAL;
2966        if (!capable(CAP_SYS_RAWIO))
2967                return -EPERM;
2968        if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2969                return -EFAULT;
2970        if ((iocommand.buf_size < 1) &&
2971            (iocommand.Request.Type.Direction != XFER_NONE)) {
2972                return -EINVAL;
2973        }
2974        if (iocommand.buf_size > 0) {
2975                buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2976                if (buff == NULL)
2977                        return -EFAULT;
2978                if (iocommand.Request.Type.Direction == XFER_WRITE) {
2979                        /* Copy the data into the buffer we created */
2980                        if (copy_from_user(buff, iocommand.buf,
2981                                iocommand.buf_size)) {
2982                                rc = -EFAULT;
2983                                goto out_kfree;
2984                        }
2985                } else {
2986                        memset(buff, 0, iocommand.buf_size);
2987                }
2988        }
2989        c = cmd_special_alloc(h);
2990        if (c == NULL) {
2991                rc = -ENOMEM;
2992                goto out_kfree;
2993        }
2994        /* Fill in the command type */
2995        c->cmd_type = CMD_IOCTL_PEND;
2996        /* Fill in Command Header */
2997        c->Header.ReplyQueue = 0; /* unused in simple mode */
2998        if (iocommand.buf_size > 0) {   /* buffer to fill */
2999                c->Header.SGList = 1;
3000                c->Header.SGTotal = 1;
3001        } else  { /* no buffers to fill */
3002                c->Header.SGList = 0;
3003                c->Header.SGTotal = 0;
3004        }
3005        memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
3006        /* use the kernel address the cmd block for tag */
3007        c->Header.Tag.lower = c->busaddr;
3008
3009        /* Fill in Request block */
3010        memcpy(&c->Request, &iocommand.Request,
3011                sizeof(c->Request));
3012
3013        /* Fill in the scatter gather information */
3014        if (iocommand.buf_size > 0) {
3015                temp64.val = pci_map_single(h->pdev, buff,
3016                        iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
3017                if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
3018                        c->SG[0].Addr.lower = 0;
3019                        c->SG[0].Addr.upper = 0;
3020                        c->SG[0].Len = 0;
3021                        rc = -ENOMEM;
3022                        goto out;
3023                }
3024                c->SG[0].Addr.lower = temp64.val32.lower;
3025                c->SG[0].Addr.upper = temp64.val32.upper;
3026                c->SG[0].Len = iocommand.buf_size;
3027                c->SG[0].Ext = 0; /* we are not chaining*/
3028        }
3029        hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3030        if (iocommand.buf_size > 0)
3031                hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
3032        check_ioctl_unit_attention(h, c);
3033
3034        /* Copy the error information out */
3035        memcpy(&iocommand.error_info, c->err_info,
3036                sizeof(iocommand.error_info));
3037        if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
3038                rc = -EFAULT;
3039                goto out;
3040        }
3041        if (iocommand.Request.Type.Direction == XFER_READ &&
3042                iocommand.buf_size > 0) {
3043                /* Copy the data out of the buffer we created */
3044                if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
3045                        rc = -EFAULT;
3046                        goto out;
3047                }
3048        }
3049out:
3050        cmd_special_free(h, c);
3051out_kfree:
3052        kfree(buff);
3053        return rc;
3054}
3055
3056static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
3057{
3058        BIG_IOCTL_Command_struct *ioc;
3059        struct CommandList *c;
3060        unsigned char **buff = NULL;
3061        int *buff_size = NULL;
3062        union u64bit temp64;
3063        BYTE sg_used = 0;
3064        int status = 0;
3065        int i;
3066        u32 left;
3067        u32 sz;
3068        BYTE __user *data_ptr;
3069
3070        if (!argp)
3071                return -EINVAL;
3072        if (!capable(CAP_SYS_RAWIO))
3073                return -EPERM;
3074        ioc = (BIG_IOCTL_Command_struct *)
3075            kmalloc(sizeof(*ioc), GFP_KERNEL);
3076        if (!ioc) {
3077                status = -ENOMEM;
3078                goto cleanup1;
3079        }
3080        if (copy_from_user(ioc, argp, sizeof(*ioc))) {
3081                status = -EFAULT;
3082                goto cleanup1;
3083        }
3084        if ((ioc->buf_size < 1) &&
3085            (ioc->Request.Type.Direction != XFER_NONE)) {
3086                status = -EINVAL;
3087                goto cleanup1;
3088        }
3089        /* Check kmalloc limits  using all SGs */
3090        if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
3091                status = -EINVAL;
3092                goto cleanup1;
3093        }
3094        if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
3095                status = -EINVAL;
3096                goto cleanup1;
3097        }
3098        buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
3099        if (!buff) {
3100                status = -ENOMEM;
3101                goto cleanup1;
3102        }
3103        buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
3104        if (!buff_size) {
3105                status = -ENOMEM;
3106                goto cleanup1;
3107        }
3108        left = ioc->buf_size;
3109        data_ptr = ioc->buf;
3110        while (left) {
3111                sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
3112                buff_size[sg_used] = sz;
3113                buff[sg_used] = kmalloc(sz, GFP_KERNEL);
3114                if (buff[sg_used] == NULL) {
3115                        status = -ENOMEM;
3116                        goto cleanup1;
3117                }
3118                if (ioc->Request.Type.Direction == XFER_WRITE) {
3119                        if (copy_from_user(buff[sg_used], data_ptr, sz)) {
3120                                status = -ENOMEM;
3121                                goto cleanup1;
3122                        }
3123                } else
3124                        memset(buff[sg_used], 0, sz);
3125                left -= sz;
3126                data_ptr += sz;
3127                sg_used++;
3128        }
3129        c = cmd_special_alloc(h);
3130        if (c == NULL) {
3131                status = -ENOMEM;
3132                goto cleanup1;
3133        }
3134        c->cmd_type = CMD_IOCTL_PEND;
3135        c->Header.ReplyQueue = 0;
3136        c->Header.SGList = c->Header.SGTotal = sg_used;
3137        memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
3138        c->Header.Tag.lower = c->busaddr;
3139        memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
3140        if (ioc->buf_size > 0) {
3141                int i;
3142                for (i = 0; i < sg_used; i++) {
3143                        temp64.val = pci_map_single(h->pdev, buff[i],
3144                                    buff_size[i], PCI_DMA_BIDIRECTIONAL);
3145                        if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
3146                                c->SG[i].Addr.lower = 0;
3147                                c->SG[i].Addr.upper = 0;
3148                                c->SG[i].Len = 0;
3149                                hpsa_pci_unmap(h->pdev, c, i,
3150                                        PCI_DMA_BIDIRECTIONAL);
3151                                status = -ENOMEM;
3152                                goto cleanup1;
3153                        }
3154                        c->SG[i].Addr.lower = temp64.val32.lower;
3155                        c->SG[i].Addr.upper = temp64.val32.upper;
3156                        c->SG[i].Len = buff_size[i];
3157                        /* we are not chaining */
3158                        c->SG[i].Ext = 0;
3159                }
3160        }
3161        hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3162        if (sg_used)
3163                hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
3164        check_ioctl_unit_attention(h, c);
3165        /* Copy the error information out */
3166        memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
3167        if (copy_to_user(argp, ioc, sizeof(*ioc))) {
3168                cmd_special_free(h, c);
3169                status = -EFAULT;
3170                goto cleanup1;
3171        }
3172        if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
3173                /* Copy the data out of the buffer we created */
3174                BYTE __user *ptr = ioc->buf;
3175                for (i = 0; i < sg_used; i++) {
3176                        if (copy_to_user(ptr, buff[i], buff_size[i])) {
3177                                cmd_special_free(h, c);
3178                                status = -EFAULT;
3179                                goto cleanup1;
3180                        }
3181                        ptr += buff_size[i];
3182                }
3183        }
3184        cmd_special_free(h, c);
3185        status = 0;
3186cleanup1:
3187        if (buff) {
3188                for (i = 0; i < sg_used; i++)
3189                        kfree(buff[i]);
3190                kfree(buff);
3191        }
3192        kfree(buff_size);
3193        kfree(ioc);
3194        return status;
3195}
3196
3197static void check_ioctl_unit_attention(struct ctlr_info *h,
3198        struct CommandList *c)
3199{
3200        if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
3201                        c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
3202                (void) check_for_unit_attention(h, c);
3203}
3204/*
3205 * ioctl
3206 */
3207static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
3208{
3209        struct ctlr_info *h;
3210        void __user *argp = (void __user *)arg;
3211
3212        h = sdev_to_hba(dev);
3213
3214        switch (cmd) {
3215        case CCISS_DEREGDISK:
3216        case CCISS_REGNEWDISK:
3217        case CCISS_REGNEWD:
3218                hpsa_scan_start(h->scsi_host);
3219                return 0;
3220        case CCISS_GETPCIINFO:
3221                return hpsa_getpciinfo_ioctl(h, argp);
3222        case CCISS_GETDRIVVER:
3223                return hpsa_getdrivver_ioctl(h, argp);
3224        case CCISS_PASSTHRU:
3225                return hpsa_passthru_ioctl(h, argp);
3226        case CCISS_BIG_PASSTHRU:
3227                return hpsa_big_passthru_ioctl(h, argp);
3228        default:
3229                return -ENOTTY;
3230        }
3231}
3232
3233static int hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
3234                                u8 reset_type)
3235{
3236        struct CommandList *c;
3237
3238        c = cmd_alloc(h);
3239        if (!c)
3240                return -ENOMEM;
3241        /* fill_cmd can't fail here, no data buffer to map */
3242        (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
3243                RAID_CTLR_LUNID, TYPE_MSG);
3244        c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
3245        c->waiting = NULL;
3246        enqueue_cmd_and_start_io(h, c);
3247        /* Don't wait for completion, the reset won't complete.  Don't free
3248         * the command either.  This is the last command we will send before
3249         * re-initializing everything, so it doesn't matter and won't leak.
3250         */
3251        return 0;
3252}
3253
3254static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
3255        void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
3256        int cmd_type)
3257{
3258        int pci_dir = XFER_NONE;
3259        struct CommandList *a; /* for commands to be aborted */
3260
3261        c->cmd_type = CMD_IOCTL_PEND;
3262        c->Header.ReplyQueue = 0;
3263        if (buff != NULL && size > 0) {
3264                c->Header.SGList = 1;
3265                c->Header.SGTotal = 1;
3266        } else {
3267                c->Header.SGList = 0;
3268                c->Header.SGTotal = 0;
3269        }
3270        c->Header.Tag.lower = c->busaddr;
3271        memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
3272
3273        c->Request.Type.Type = cmd_type;
3274        if (cmd_type == TYPE_CMD) {
3275                switch (cmd) {
3276                case HPSA_INQUIRY:
3277                        /* are we trying to read a vital product page */
3278                        if (page_code != 0) {
3279                                c->Request.CDB[1] = 0x01;
3280                                c->Request.CDB[2] = page_code;
3281                        }
3282                        c->Request.CDBLen = 6;
3283                        c->Request.Type.Attribute = ATTR_SIMPLE;
3284                        c->Request.Type.Direction = XFER_READ;
3285                        c->Request.Timeout = 0;
3286                        c->Request.CDB[0] = HPSA_INQUIRY;
3287                        c->Request.CDB[4] = size & 0xFF;
3288                        break;
3289                case HPSA_REPORT_LOG:
3290                case HPSA_REPORT_PHYS:
3291                        /* Talking to controller so It's a physical command
3292                           mode = 00 target = 0.  Nothing to write.
3293                         */
3294                        c->Request.CDBLen = 12;
3295                        c->Request.Type.Attribute = ATTR_SIMPLE;
3296                        c->Request.Type.Direction = XFER_READ;
3297                        c->Request.Timeout = 0;
3298                        c->Request.CDB[0] = cmd;
3299                        c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
3300                        c->Request.CDB[7] = (size >> 16) & 0xFF;
3301                        c->Request.CDB[8] = (size >> 8) & 0xFF;
3302                        c->Request.CDB[9] = size & 0xFF;
3303                        break;
3304                case HPSA_CACHE_FLUSH:
3305                        c->Request.CDBLen = 12;
3306                        c->Request.Type.Attribute = ATTR_SIMPLE;
3307                        c->Request.Type.Direction = XFER_WRITE;
3308                        c->Request.Timeout = 0;
3309                        c->Request.CDB[0] = BMIC_WRITE;
3310                        c->Request.CDB[6] = BMIC_CACHE_FLUSH;
3311                        c->Request.CDB[7] = (size >> 8) & 0xFF;
3312                        c->Request.CDB[8] = size & 0xFF;
3313                        break;
3314                case TEST_UNIT_READY:
3315                        c->Request.CDBLen = 6;
3316                        c->Request.Type.Attribute = ATTR_SIMPLE;
3317                        c->Request.Type.Direction = XFER_NONE;
3318                        c->Request.Timeout = 0;
3319                        break;
3320                default:
3321                        dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
3322                        BUG();
3323                        return -1;
3324                }
3325        } else if (cmd_type == TYPE_MSG) {
3326                switch (cmd) {
3327
3328                case  HPSA_DEVICE_RESET_MSG:
3329                        c->Request.CDBLen = 16;
3330                        c->Request.Type.Type =  1; /* It is a MSG not a CMD */
3331                        c->Request.Type.Attribute = ATTR_SIMPLE;
3332                        c->Request.Type.Direction = XFER_NONE;
3333                        c->Request.Timeout = 0; /* Don't time out */
3334                        memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
3335                        c->Request.CDB[0] =  cmd;
3336                        c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
3337                        /* If bytes 4-7 are zero, it means reset the */
3338                        /* LunID device */
3339                        c->Request.CDB[4] = 0x00;
3340                        c->Request.CDB[5] = 0x00;
3341                        c->Request.CDB[6] = 0x00;
3342                        c->Request.CDB[7] = 0x00;
3343                        break;
3344                case  HPSA_ABORT_MSG:
3345                        a = buff;       /* point to command to be aborted */
3346                        dev_dbg(&h->pdev->dev, "Abort Tag:0x%08x:%08x using request Tag:0x%08x:%08x\n",
3347                                a->Header.Tag.upper, a->Header.Tag.lower,
3348                                c->Header.Tag.upper, c->Header.Tag.lower);
3349                        c->Request.CDBLen = 16;
3350                        c->Request.Type.Type = TYPE_MSG;
3351                        c->Request.Type.Attribute = ATTR_SIMPLE;
3352                        c->Request.Type.Direction = XFER_WRITE;
3353                        c->Request.Timeout = 0; /* Don't time out */
3354                        c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
3355                        c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
3356                        c->Request.CDB[2] = 0x00; /* reserved */
3357                        c->Request.CDB[3] = 0x00; /* reserved */
3358                        /* Tag to abort goes in CDB[4]-CDB[11] */
3359                        c->Request.CDB[4] = a->Header.Tag.lower & 0xFF;
3360                        c->Request.CDB[5] = (a->Header.Tag.lower >> 8) & 0xFF;
3361                        c->Request.CDB[6] = (a->Header.Tag.lower >> 16) & 0xFF;
3362                        c->Request.CDB[7] = (a->Header.Tag.lower >> 24) & 0xFF;
3363                        c->Request.CDB[8] = a->Header.Tag.upper & 0xFF;
3364                        c->Request.CDB[9] = (a->Header.Tag.upper >> 8) & 0xFF;
3365                        c->Request.CDB[10] = (a->Header.Tag.upper >> 16) & 0xFF;
3366                        c->Request.CDB[11] = (a->Header.Tag.upper >> 24) & 0xFF;
3367                        c->Request.CDB[12] = 0x00; /* reserved */
3368                        c->Request.CDB[13] = 0x00; /* reserved */
3369                        c->Request.CDB[14] = 0x00; /* reserved */
3370                        c->Request.CDB[15] = 0x00; /* reserved */
3371                break;
3372                default:
3373                        dev_warn(&h->pdev->dev, "unknown message type %d\n",
3374                                cmd);
3375                        BUG();
3376                }
3377        } else {
3378                dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
3379                BUG();
3380        }
3381
3382        switch (c->Request.Type.Direction) {
3383        case XFER_READ:
3384                pci_dir = PCI_DMA_FROMDEVICE;
3385                break;
3386        case XFER_WRITE:
3387                pci_dir = PCI_DMA_TODEVICE;
3388                break;
3389        case XFER_NONE:
3390                pci_dir = PCI_DMA_NONE;
3391                break;
3392        default:
3393                pci_dir = PCI_DMA_BIDIRECTIONAL;
3394        }
3395        if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
3396                return -1;
3397        return 0;
3398}
3399
3400/*
3401 * Map (physical) PCI mem into (virtual) kernel space
3402 */
3403static void __iomem *remap_pci_mem(ulong base, ulong size)
3404{
3405        ulong page_base = ((ulong) base) & PAGE_MASK;
3406        ulong page_offs = ((ulong) base) - page_base;
3407        void __iomem *page_remapped = ioremap_nocache(page_base,
3408                page_offs + size);
3409
3410        return page_remapped ? (page_remapped + page_offs) : NULL;
3411}
3412
3413/* Takes cmds off the submission queue and sends them to the hardware,
3414 * then puts them on the queue of cmds waiting for completion.
3415 */
3416static void start_io(struct ctlr_info *h)
3417{
3418        struct CommandList *c;
3419        unsigned long flags;
3420
3421        spin_lock_irqsave(&h->lock, flags);
3422        while (!list_empty(&h->reqQ)) {
3423                c = list_entry(h->reqQ.next, struct CommandList, list);
3424                /* can't do anything if fifo is full */
3425                if ((h->access.fifo_full(h))) {
3426                        dev_warn(&h->pdev->dev, "fifo full\n");
3427                        break;
3428                }
3429
3430                /* Get the first entry from the Request Q */
3431                removeQ(c);
3432                h->Qdepth--;
3433
3434                /* Put job onto the completed Q */
3435                addQ(&h->cmpQ, c);
3436
3437                /* Must increment commands_outstanding before unlocking
3438                 * and submitting to avoid race checking for fifo full
3439                 * condition.
3440                 */
3441                h->commands_outstanding++;
3442                if (h->commands_outstanding > h->max_outstanding)
3443                        h->max_outstanding = h->commands_outstanding;
3444
3445                /* Tell the controller execute command */
3446                spin_unlock_irqrestore(&h->lock, flags);
3447                h->access.submit_command(h, c);
3448                spin_lock_irqsave(&h->lock, flags);
3449        }
3450        spin_unlock_irqrestore(&h->lock, flags);
3451}
3452
3453static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
3454{
3455        return h->access.command_completed(h, q);
3456}
3457
3458static inline bool interrupt_pending(struct ctlr_info *h)
3459{
3460        return h->access.intr_pending(h);
3461}
3462
3463static inline long interrupt_not_for_us(struct ctlr_info *h)
3464{
3465        return (h->access.intr_pending(h) == 0) ||
3466                (h->interrupts_enabled == 0);
3467}
3468
3469static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
3470        u32 raw_tag)
3471{
3472        if (unlikely(tag_index >= h->nr_cmds)) {
3473                dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3474                return 1;
3475        }
3476        return 0;
3477}
3478
3479static inline void finish_cmd(struct CommandList *c)
3480{
3481        unsigned long flags;
3482
3483        spin_lock_irqsave(&c->h->lock, flags);
3484        removeQ(c);
3485        spin_unlock_irqrestore(&c->h->lock, flags);
3486        dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
3487        if (likely(c->cmd_type == CMD_SCSI))
3488                complete_scsi_command(c);
3489        else if (c->cmd_type == CMD_IOCTL_PEND)
3490                complete(c->waiting);
3491}
3492
3493static inline u32 hpsa_tag_contains_index(u32 tag)
3494{
3495        return tag & DIRECT_LOOKUP_BIT;
3496}
3497
3498static inline u32 hpsa_tag_to_index(u32 tag)
3499{
3500        return tag >> DIRECT_LOOKUP_SHIFT;
3501}
3502
3503
3504static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3505{
3506#define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3507#define HPSA_SIMPLE_ERROR_BITS 0x03
3508        if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3509                return tag & ~HPSA_SIMPLE_ERROR_BITS;
3510        return tag & ~HPSA_PERF_ERROR_BITS;
3511}
3512
3513/* process completion of an indexed ("direct lookup") command */
3514static inline void process_indexed_cmd(struct ctlr_info *h,
3515        u32 raw_tag)
3516{
3517        u32 tag_index;
3518        struct CommandList *c;
3519
3520        tag_index = hpsa_tag_to_index(raw_tag);
3521        if (!bad_tag(h, tag_index, raw_tag)) {
3522                c = h->cmd_pool + tag_index;
3523                finish_cmd(c);
3524        }
3525}
3526
3527/* process completion of a non-indexed command */
3528static inline void process_nonindexed_cmd(struct ctlr_info *h,
3529        u32 raw_tag)
3530{
3531        u32 tag;
3532        struct CommandList *c = NULL;
3533        unsigned long flags;
3534
3535        tag = hpsa_tag_discard_error_bits(h, raw_tag);
3536        spin_lock_irqsave(&h->lock, flags);
3537        list_for_each_entry(c, &h->cmpQ, list) {
3538                if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3539                        spin_unlock_irqrestore(&h->lock, flags);
3540                        finish_cmd(c);
3541                        return;
3542                }
3543        }
3544        spin_unlock_irqrestore(&h->lock, flags);
3545        bad_tag(h, h->nr_cmds + 1, raw_tag);
3546}
3547
3548/* Some controllers, like p400, will give us one interrupt
3549 * after a soft reset, even if we turned interrupts off.
3550 * Only need to check for this in the hpsa_xxx_discard_completions
3551 * functions.
3552 */
3553static int ignore_bogus_interrupt(struct ctlr_info *h)
3554{
3555        if (likely(!reset_devices))
3556                return 0;
3557
3558        if (likely(h->interrupts_enabled))
3559                return 0;
3560
3561        dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3562                "(known firmware bug.)  Ignoring.\n");
3563
3564        return 1;
3565}
3566
3567/*
3568 * Convert &h->q[x] (passed to interrupt handlers) back to h.
3569 * Relies on (h-q[x] == x) being true for x such that
3570 * 0 <= x < MAX_REPLY_QUEUES.
3571 */
3572static struct ctlr_info *queue_to_hba(u8 *queue)
3573{
3574        return container_of((queue - *queue), struct ctlr_info, q[0]);
3575}
3576
3577static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
3578{
3579        struct ctlr_info *h = queue_to_hba(queue);
3580        u8 q = *(u8 *) queue;
3581        u32 raw_tag;
3582
3583        if (ignore_bogus_interrupt(h))
3584                return IRQ_NONE;
3585
3586        if (interrupt_not_for_us(h))
3587                return IRQ_NONE;
3588        h->last_intr_timestamp = get_jiffies_64();
3589        while (interrupt_pending(h)) {
3590                raw_tag = get_next_completion(h, q);
3591                while (raw_tag != FIFO_EMPTY)
3592                        raw_tag = next_command(h, q);
3593        }
3594        return IRQ_HANDLED;
3595}
3596
3597static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
3598{
3599        struct ctlr_info *h = queue_to_hba(queue);
3600        u32 raw_tag;
3601        u8 q = *(u8 *) queue;
3602
3603        if (ignore_bogus_interrupt(h))
3604                return IRQ_NONE;
3605
3606        h->last_intr_timestamp = get_jiffies_64();
3607        raw_tag = get_next_completion(h, q);
3608        while (raw_tag != FIFO_EMPTY)
3609                raw_tag = next_command(h, q);
3610        return IRQ_HANDLED;
3611}
3612
3613static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
3614{
3615        struct ctlr_info *h = queue_to_hba((u8 *) queue);
3616        u32 raw_tag;
3617        u8 q = *(u8 *) queue;
3618
3619        if (interrupt_not_for_us(h))
3620                return IRQ_NONE;
3621        h->last_intr_timestamp = get_jiffies_64();
3622        while (interrupt_pending(h)) {
3623                raw_tag = get_next_completion(h, q);
3624                while (raw_tag != FIFO_EMPTY) {
3625                        if (likely(hpsa_tag_contains_index(raw_tag)))
3626                                process_indexed_cmd(h, raw_tag);
3627                        else
3628                                process_nonindexed_cmd(h, raw_tag);
3629                        raw_tag = next_command(h, q);
3630                }
3631        }
3632        return IRQ_HANDLED;
3633}
3634
3635static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
3636{
3637        struct ctlr_info *h = queue_to_hba(queue);
3638        u32 raw_tag;
3639        u8 q = *(u8 *) queue;
3640
3641        h->last_intr_timestamp = get_jiffies_64();
3642        raw_tag = get_next_completion(h, q);
3643        while (raw_tag != FIFO_EMPTY) {
3644                if (likely(hpsa_tag_contains_index(raw_tag)))
3645                        process_indexed_cmd(h, raw_tag);
3646                else
3647                        process_nonindexed_cmd(h, raw_tag);
3648                raw_tag = next_command(h, q);
3649        }
3650        return IRQ_HANDLED;
3651}
3652
3653/* Send a message CDB to the firmware. Careful, this only works
3654 * in simple mode, not performant mode due to the tag lookup.
3655 * We only ever use this immediately after a controller reset.
3656 */
3657static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
3658                        unsigned char type)
3659{
3660        struct Command {
3661                struct CommandListHeader CommandHeader;
3662                struct RequestBlock Request;
3663                struct ErrDescriptor ErrorDescriptor;
3664        };
3665        struct Command *cmd;
3666        static const size_t cmd_sz = sizeof(*cmd) +
3667                                        sizeof(cmd->ErrorDescriptor);
3668        dma_addr_t paddr64;
3669        uint32_t paddr32, tag;
3670        void __iomem *vaddr;
3671        int i, err;
3672
3673        vaddr = pci_ioremap_bar(pdev, 0);
3674        if (vaddr == NULL)
3675                return -ENOMEM;
3676
3677        /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3678         * CCISS commands, so they must be allocated from the lower 4GiB of
3679         * memory.
3680         */
3681        err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3682        if (err) {
3683                iounmap(vaddr);
3684                return -ENOMEM;
3685        }
3686
3687        cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3688        if (cmd == NULL) {
3689                iounmap(vaddr);
3690                return -ENOMEM;
3691        }
3692
3693        /* This must fit, because of the 32-bit consistent DMA mask.  Also,
3694         * although there's no guarantee, we assume that the address is at
3695         * least 4-byte aligned (most likely, it's page-aligned).
3696         */
3697        paddr32 = paddr64;
3698
3699        cmd->CommandHeader.ReplyQueue = 0;
3700        cmd->CommandHeader.SGList = 0;
3701        cmd->CommandHeader.SGTotal = 0;
3702        cmd->CommandHeader.Tag.lower = paddr32;
3703        cmd->CommandHeader.Tag.upper = 0;
3704        memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3705
3706        cmd->Request.CDBLen = 16;
3707        cmd->Request.Type.Type = TYPE_MSG;
3708        cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3709        cmd->Request.Type.Direction = XFER_NONE;
3710        cmd->Request.Timeout = 0; /* Don't time out */
3711        cmd->Request.CDB[0] = opcode;
3712        cmd->Request.CDB[1] = type;
3713        memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3714        cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3715        cmd->ErrorDescriptor.Addr.upper = 0;
3716        cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3717
3718        writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3719
3720        for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3721                tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3722                if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3723                        break;
3724                msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3725        }
3726
3727        iounmap(vaddr);
3728
3729        /* we leak the DMA buffer here ... no choice since the controller could
3730         *  still complete the command.
3731         */
3732        if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3733                dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3734                        opcode, type);
3735                return -ETIMEDOUT;
3736        }
3737
3738        pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3739
3740        if (tag & HPSA_ERROR_BIT) {
3741                dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3742                        opcode, type);
3743                return -EIO;
3744        }
3745
3746        dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3747                opcode, type);
3748        return 0;
3749}
3750
3751#define hpsa_noop(p) hpsa_message(p, 3, 0)
3752
3753static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3754        void * __iomem vaddr, u32 use_doorbell)
3755{
3756        u16 pmcsr;
3757        int pos;
3758
3759        if (use_doorbell) {
3760                /* For everything after the P600, the PCI power state method
3761                 * of resetting the controller doesn't work, so we have this
3762                 * other way using the doorbell register.
3763                 */
3764                dev_info(&pdev->dev, "using doorbell to reset controller\n");
3765                writel(use_doorbell, vaddr + SA5_DOORBELL);
3766        } else { /* Try to do it the PCI power state way */
3767
3768                /* Quoting from the Open CISS Specification: "The Power
3769                 * Management Control/Status Register (CSR) controls the power
3770                 * state of the device.  The normal operating state is D0,
3771                 * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3772                 * the controller, place the interface device in D3 then to D0,
3773                 * this causes a secondary PCI reset which will reset the
3774                 * controller." */
3775
3776                pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3777                if (pos == 0) {
3778                        dev_err(&pdev->dev,
3779                                "hpsa_reset_controller: "
3780                                "PCI PM not supported\n");
3781                        return -ENODEV;
3782                }
3783                dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3784                /* enter the D3hot power management state */
3785                pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3786                pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3787                pmcsr |= PCI_D3hot;
3788                pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3789
3790                msleep(500);
3791
3792                /* enter the D0 power management state */
3793                pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3794                pmcsr |= PCI_D0;
3795                pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3796
3797                /*
3798                 * The P600 requires a small delay when changing states.
3799                 * Otherwise we may think the board did not reset and we bail.
3800                 * This for kdump only and is particular to the P600.
3801                 */
3802                msleep(500);
3803        }
3804        return 0;
3805}
3806
3807static void init_driver_version(char *driver_version, int len)
3808{
3809        memset(driver_version, 0, len);
3810        strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
3811}
3812
3813static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
3814{
3815        char *driver_version;
3816        int i, size = sizeof(cfgtable->driver_version);
3817
3818        driver_version = kmalloc(size, GFP_KERNEL);
3819        if (!driver_version)
3820                return -ENOMEM;
3821
3822        init_driver_version(driver_version, size);
3823        for (i = 0; i < size; i++)
3824                writeb(driver_version[i], &cfgtable->driver_version[i]);
3825        kfree(driver_version);
3826        return 0;
3827}
3828
3829static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
3830                                          unsigned char *driver_ver)
3831{
3832        int i;
3833
3834        for (i = 0; i < sizeof(cfgtable->driver_version); i++)
3835                driver_ver[i] = readb(&cfgtable->driver_version[i]);
3836}
3837
3838static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
3839{
3840
3841        char *driver_ver, *old_driver_ver;
3842        int rc, size = sizeof(cfgtable->driver_version);
3843
3844        old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
3845        if (!old_driver_ver)
3846                return -ENOMEM;
3847        driver_ver = old_driver_ver + size;
3848
3849        /* After a reset, the 32 bytes of "driver version" in the cfgtable
3850         * should have been changed, otherwise we know the reset failed.
3851         */
3852        init_driver_version(old_driver_ver, size);
3853        read_driver_ver_from_cfgtable(cfgtable, driver_ver);
3854        rc = !memcmp(driver_ver, old_driver_ver, size);
3855        kfree(old_driver_ver);
3856        return rc;
3857}
3858/* This does a hard reset of the controller using PCI power management
3859 * states or the using the doorbell register.
3860 */
3861static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3862{
3863        u64 cfg_offset;
3864        u32 cfg_base_addr;
3865        u64 cfg_base_addr_index;
3866        void __iomem *vaddr;
3867        unsigned long paddr;
3868        u32 misc_fw_support;
3869        int rc;
3870        struct CfgTable __iomem *cfgtable;
3871        u32 use_doorbell;
3872        u32 board_id;
3873        u16 command_register;
3874
3875        /* For controllers as old as the P600, this is very nearly
3876         * the same thing as
3877         *
3878         * pci_save_state(pci_dev);
3879         * pci_set_power_state(pci_dev, PCI_D3hot);
3880         * pci_set_power_state(pci_dev, PCI_D0);
3881         * pci_restore_state(pci_dev);
3882         *
3883         * For controllers newer than the P600, the pci power state
3884         * method of resetting doesn't work so we have another way
3885         * using the doorbell register.
3886         */
3887
3888        rc = hpsa_lookup_board_id(pdev, &board_id);
3889        if (rc < 0 || !ctlr_is_resettable(board_id)) {
3890                dev_warn(&pdev->dev, "Not resetting device.\n");
3891                return -ENODEV;
3892        }
3893
3894        /* if controller is soft- but not hard resettable... */
3895        if (!ctlr_is_hard_resettable(board_id))
3896                return -ENOTSUPP; /* try soft reset later. */
3897
3898        /* Save the PCI command register */
3899        pci_read_config_word(pdev, 4, &command_register);
3900        /* Turn the board off.  This is so that later pci_restore_state()
3901         * won't turn the board on before the rest of config space is ready.
3902         */
3903        pci_disable_device(pdev);
3904        pci_save_state(pdev);
3905
3906        /* find the first memory BAR, so we can find the cfg table */
3907        rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3908        if (rc)
3909                return rc;
3910        vaddr = remap_pci_mem(paddr, 0x250);
3911        if (!vaddr)
3912                return -ENOMEM;
3913
3914        /* find cfgtable in order to check if reset via doorbell is supported */
3915        rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3916                                        &cfg_base_addr_index, &cfg_offset);
3917        if (rc)
3918                goto unmap_vaddr;
3919        cfgtable = remap_pci_mem(pci_resource_start(pdev,
3920                       cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3921        if (!cfgtable) {
3922                rc = -ENOMEM;
3923                goto unmap_vaddr;
3924        }
3925        rc = write_driver_ver_to_cfgtable(cfgtable);
3926        if (rc)
3927                goto unmap_vaddr;
3928
3929        /* If reset via doorbell register is supported, use that.
3930         * There are two such methods.  Favor the newest method.
3931         */
3932        misc_fw_support = readl(&cfgtable->misc_fw_support);
3933        use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
3934        if (use_doorbell) {
3935                use_doorbell = DOORBELL_CTLR_RESET2;
3936        } else {
3937                use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3938                if (use_doorbell) {
3939                        dev_warn(&pdev->dev, "Soft reset not supported. "
3940                                "Firmware update is required.\n");
3941                        rc = -ENOTSUPP; /* try soft reset */
3942                        goto unmap_cfgtable;
3943                }
3944        }
3945
3946        rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3947        if (rc)
3948                goto unmap_cfgtable;
3949
3950        pci_restore_state(pdev);
3951        rc = pci_enable_device(pdev);
3952        if (rc) {
3953                dev_warn(&pdev->dev, "failed to enable device.\n");
3954                goto unmap_cfgtable;
3955        }
3956        pci_write_config_word(pdev, 4, command_register);
3957
3958        /* Some devices (notably the HP Smart Array 5i Controller)
3959           need a little pause here */
3960        msleep(HPSA_POST_RESET_PAUSE_MSECS);
3961
3962        /* Wait for board to become not ready, then ready. */
3963        dev_info(&pdev->dev, "Waiting for board to reset.\n");
3964        rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3965        if (rc) {
3966                dev_warn(&pdev->dev,
3967                        "failed waiting for board to reset."
3968                        " Will try soft reset.\n");
3969                rc = -ENOTSUPP; /* Not expected, but try soft reset later */
3970                goto unmap_cfgtable;
3971        }
3972        rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
3973        if (rc) {
3974                dev_warn(&pdev->dev,
3975                        "failed waiting for board to become ready "
3976                        "after hard reset\n");
3977                goto unmap_cfgtable;
3978        }
3979
3980        rc = controller_reset_failed(vaddr);
3981        if (rc < 0)
3982                goto unmap_cfgtable;
3983        if (rc) {
3984                dev_warn(&pdev->dev, "Unable to successfully reset "
3985                        "controller. Will try soft reset.\n");
3986                rc = -ENOTSUPP;
3987        } else {
3988                dev_info(&pdev->dev, "board ready after hard reset.\n");
3989        }
3990
3991unmap_cfgtable:
3992        iounmap(cfgtable);
3993
3994unmap_vaddr:
3995        iounmap(vaddr);
3996        return rc;
3997}
3998
3999/*
4000 *  We cannot read the structure directly, for portability we must use
4001 *   the io functions.
4002 *   This is for debug only.
4003 */
4004static void print_cfg_table(struct device *dev, struct CfgTable *tb)
4005{
4006#ifdef HPSA_DEBUG
4007        int i;
4008        char temp_name[17];
4009
4010        dev_info(dev, "Controller Configuration information\n");
4011        dev_info(dev, "------------------------------------\n");
4012        for (i = 0; i < 4; i++)
4013                temp_name[i] = readb(&(tb->Signature[i]));
4014        temp_name[4] = '\0';
4015        dev_info(dev, "   Signature = %s\n", temp_name);
4016        dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
4017        dev_info(dev, "   Transport methods supported = 0x%x\n",
4018               readl(&(tb->TransportSupport)));
4019        dev_info(dev, "   Transport methods active = 0x%x\n",
4020               readl(&(tb->TransportActive)));
4021        dev_info(dev, "   Requested transport Method = 0x%x\n",
4022               readl(&(tb->HostWrite.TransportRequest)));
4023        dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
4024               readl(&(tb->HostWrite.CoalIntDelay)));
4025        dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
4026               readl(&(tb->HostWrite.CoalIntCount)));
4027        dev_info(dev, "   Max outstanding commands = 0x%d\n",
4028               readl(&(tb->CmdsOutMax)));
4029        dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
4030        for (i = 0; i < 16; i++)
4031                temp_name[i] = readb(&(tb->ServerName[i]));
4032        temp_name[16] = '\0';
4033        dev_info(dev, "   Server Name = %s\n", temp_name);
4034        dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
4035                readl(&(tb->HeartBeat)));
4036#endif                          /* HPSA_DEBUG */
4037}
4038
4039static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
4040{
4041        int i, offset, mem_type, bar_type;
4042
4043        if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
4044                return 0;
4045        offset = 0;
4046        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4047                bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
4048                if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
4049                        offset += 4;
4050                else {
4051                        mem_type = pci_resource_flags(pdev, i) &
4052                            PCI_BASE_ADDRESS_MEM_TYPE_MASK;
4053                        switch (mem_type) {
4054                        case PCI_BASE_ADDRESS_MEM_TYPE_32:
4055                        case PCI_BASE_ADDRESS_MEM_TYPE_1M:
4056                                offset += 4;    /* 32 bit */
4057                                break;
4058                        case PCI_BASE_ADDRESS_MEM_TYPE_64:
4059                                offset += 8;
4060                                break;
4061                        default:        /* reserved in PCI 2.2 */
4062                                dev_warn(&pdev->dev,
4063                                       "base address is invalid\n");
4064                                return -1;
4065                                break;
4066                        }
4067                }
4068                if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
4069                        return i + 1;
4070        }
4071        return -1;
4072}
4073
4074/* If MSI/MSI-X is supported by the kernel we will try to enable it on
4075 * controllers that are capable. If not, we use IO-APIC mode.
4076 */
4077
4078static void hpsa_interrupt_mode(struct ctlr_info *h)
4079{
4080#ifdef CONFIG_PCI_MSI
4081        int err, i;
4082        struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];
4083
4084        for (i = 0; i < MAX_REPLY_QUEUES; i++) {
4085                hpsa_msix_entries[i].vector = 0;
4086                hpsa_msix_entries[i].entry = i;
4087        }
4088
4089        /* Some boards advertise MSI but don't really support it */
4090        if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
4091            (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
4092                goto default_int_mode;
4093        if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
4094                dev_info(&h->pdev->dev, "MSIX\n");
4095                err = pci_enable_msix(h->pdev, hpsa_msix_entries,
4096                                                MAX_REPLY_QUEUES);
4097                if (!err) {
4098                        for (i = 0; i < MAX_REPLY_QUEUES; i++)
4099                                h->intr[i] = hpsa_msix_entries[i].vector;
4100                        h->msix_vector = 1;
4101                        return;
4102                }
4103                if (err > 0) {
4104                        dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
4105                               "available\n", err);
4106                        goto default_int_mode;
4107                } else {
4108                        dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
4109                               err);
4110                        goto default_int_mode;
4111                }
4112        }
4113        if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
4114                dev_info(&h->pdev->dev, "MSI\n");
4115                if (!pci_enable_msi(h->pdev))
4116                        h->msi_vector = 1;
4117                else
4118                        dev_warn(&h->pdev->dev, "MSI init failed\n");
4119        }
4120default_int_mode:
4121#endif                          /* CONFIG_PCI_MSI */
4122        /* if we get here we're going to use the default interrupt mode */
4123        h->intr[h->intr_mode] = h->pdev->irq;
4124}
4125
4126static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
4127{
4128        int i;
4129        u32 subsystem_vendor_id, subsystem_device_id;
4130
4131        subsystem_vendor_id = pdev->subsystem_vendor;
4132        subsystem_device_id = pdev->subsystem_device;
4133        *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4134                    subsystem_vendor_id;
4135
4136        for (i = 0; i < ARRAY_SIZE(products); i++)
4137                if (*board_id == products[i].board_id)
4138                        return i;
4139
4140        if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
4141                subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
4142                !hpsa_allow_any) {
4143                dev_warn(&pdev->dev, "unrecognized board ID: "
4144                        "0x%08x, ignoring.\n", *board_id);
4145                        return -ENODEV;
4146        }
4147        return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
4148}
4149
4150static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
4151                                    unsigned long *memory_bar)
4152{
4153        int i;
4154
4155        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4156                if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4157                        /* addressing mode bits already removed */
4158                        *memory_bar = pci_resource_start(pdev, i);
4159                        dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4160                                *memory_bar);
4161                        return 0;
4162                }
4163        dev_warn(&pdev->dev, "no memory BAR found\n");
4164        return -ENODEV;
4165}
4166
4167static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
4168                                     int wait_for_ready)
4169{
4170        int i, iterations;
4171        u32 scratchpad;
4172        if (wait_for_ready)
4173                iterations = HPSA_BOARD_READY_ITERATIONS;
4174        else
4175                iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
4176
4177        for (i = 0; i < iterations; i++) {
4178                scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
4179                if (wait_for_ready) {
4180                        if (scratchpad == HPSA_FIRMWARE_READY)
4181                                return 0;
4182                } else {
4183                        if (scratchpad != HPSA_FIRMWARE_READY)
4184                                return 0;
4185                }
4186                msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
4187        }
4188        dev_warn(&pdev->dev, "board not ready, timed out.\n");
4189        return -ENODEV;
4190}
4191
4192static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
4193                               u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4194                               u64 *cfg_offset)
4195{
4196        *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4197        *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4198        *cfg_base_addr &= (u32) 0x0000ffff;
4199        *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4200        if (*cfg_base_addr_index == -1) {
4201                dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
4202                return -ENODEV;
4203        }
4204        return 0;
4205}
4206
4207static int hpsa_find_cfgtables(struct ctlr_info *h)
4208{
4209        u64 cfg_offset;
4210        u32 cfg_base_addr;
4211        u64 cfg_base_addr_index;
4212        u32 trans_offset;
4213        int rc;
4214
4215        rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4216                &cfg_base_addr_index, &cfg_offset);
4217        if (rc)
4218                return rc;
4219        h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
4220                       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
4221        if (!h->cfgtable)
4222                return -ENOMEM;
4223        rc = write_driver_ver_to_cfgtable(h->cfgtable);
4224        if (rc)
4225                return rc;
4226        /* Find performant mode table. */
4227        trans_offset = readl(&h->cfgtable->TransMethodOffset);
4228        h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4229                                cfg_base_addr_index)+cfg_offset+trans_offset,
4230                                sizeof(*h->transtable));
4231        if (!h->transtable)
4232                return -ENOMEM;
4233        return 0;
4234}
4235
4236static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
4237{
4238        h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
4239
4240        /* Limit commands in memory limited kdump scenario. */
4241        if (reset_devices && h->max_commands > 32)
4242                h->max_commands = 32;
4243
4244        if (h->max_commands < 16) {
4245                dev_warn(&h->pdev->dev, "Controller reports "
4246                        "max supported commands of %d, an obvious lie. "
4247                        "Using 16.  Ensure that firmware is up to date.\n",
4248                        h->max_commands);
4249                h->max_commands = 16;
4250        }
4251}
4252
4253/* Interrogate the hardware for some limits:
4254 * max commands, max SG elements without chaining, and with chaining,
4255 * SG chain block size, etc.
4256 */
4257static void hpsa_find_board_params(struct ctlr_info *h)
4258{
4259        hpsa_get_max_perf_mode_cmds(h);
4260        h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
4261        h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
4262        /*
4263         * Limit in-command s/g elements to 32 save dma'able memory.
4264         * Howvever spec says if 0, use 31
4265         */
4266        h->max_cmd_sg_entries = 31;
4267        if (h->maxsgentries > 512) {
4268                h->max_cmd_sg_entries = 32;
4269                h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
4270                h->maxsgentries--; /* save one for chain pointer */
4271        } else {
4272                h->maxsgentries = 31; /* default to traditional values */
4273                h->chainsize = 0;
4274        }
4275
4276        /* Find out what task management functions are supported and cache */
4277        h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
4278}
4279
4280static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
4281{
4282        if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
4283                dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4284                return false;
4285        }
4286        return true;
4287}
4288
4289/* Need to enable prefetch in the SCSI core for 6400 in x86 */
4290static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
4291{
4292#ifdef CONFIG_X86
4293        u32 prefetch;
4294
4295        prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4296        prefetch |= 0x100;
4297        writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
4298#endif
4299}
4300
4301/* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
4302 * in a prefetch beyond physical memory.
4303 */
4304static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
4305{
4306        u32 dma_prefetch;
4307
4308        if (h->board_id != 0x3225103C)
4309                return;
4310        dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4311        dma_prefetch |= 0x8000;
4312        writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4313}
4314
4315static void hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
4316{
4317        int i;
4318        u32 doorbell_value;
4319        unsigned long flags;
4320
4321        /* under certain very rare conditions, this can take awhile.
4322         * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
4323         * as we enter this code.)
4324         */
4325        for (i = 0; i < MAX_CONFIG_WAIT; i++) {
4326                spin_lock_irqsave(&h->lock, flags);
4327                doorbell_value = readl(h->vaddr + SA5_DOORBELL);
4328                spin_unlock_irqrestore(&h->lock, flags);
4329                if (!(doorbell_value & CFGTBL_ChangeReq))
4330                        break;
4331                /* delay and try again */
4332                usleep_range(10000, 20000);
4333        }
4334}
4335
4336static int hpsa_enter_simple_mode(struct ctlr_info *h)
4337{
4338        u32 trans_support;
4339
4340        trans_support = readl(&(h->cfgtable->TransportSupport));
4341        if (!(trans_support & SIMPLE_MODE))
4342                return -ENOTSUPP;
4343
4344        h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
4345        /* Update the field, and then ring the doorbell */
4346        writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
4347        writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4348        hpsa_wait_for_mode_change_ack(h);
4349        print_cfg_table(&h->pdev->dev, h->cfgtable);
4350        if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
4351                dev_warn(&h->pdev->dev,
4352                        "unable to get board into simple mode\n");
4353                return -ENODEV;
4354        }
4355        h->transMethod = CFGTBL_Trans_Simple;
4356        return 0;
4357}
4358
4359static int hpsa_pci_init(struct ctlr_info *h)
4360{
4361        int prod_index, err;
4362
4363        prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
4364        if (prod_index < 0)
4365                return -ENODEV;
4366        h->product_name = products[prod_index].product_name;
4367        h->access = *(products[prod_index].access);
4368
4369        pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
4370                               PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
4371
4372        err = pci_enable_device(h->pdev);
4373        if (err) {
4374                dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
4375                return err;
4376        }
4377
4378        /* Enable bus mastering (pci_disable_device may disable this) */
4379        pci_set_master(h->pdev);
4380
4381        err = pci_request_regions(h->pdev, HPSA);
4382        if (err) {
4383                dev_err(&h->pdev->dev,
4384                        "cannot obtain PCI resources, aborting\n");
4385                return err;
4386        }
4387        hpsa_interrupt_mode(h);
4388        err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
4389        if (err)
4390                goto err_out_free_res;
4391        h->vaddr = remap_pci_mem(h->paddr, 0x250);
4392        if (!h->vaddr) {
4393                err = -ENOMEM;
4394                goto err_out_free_res;
4395        }
4396        err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
4397        if (err)
4398                goto err_out_free_res;
4399        err = hpsa_find_cfgtables(h);
4400        if (err)
4401                goto err_out_free_res;
4402        hpsa_find_board_params(h);
4403
4404        if (!hpsa_CISS_signature_present(h)) {
4405                err = -ENODEV;
4406                goto err_out_free_res;
4407        }
4408        hpsa_enable_scsi_prefetch(h);
4409        hpsa_p600_dma_prefetch_quirk(h);
4410        err = hpsa_enter_simple_mode(h);
4411        if (err)
4412                goto err_out_free_res;
4413        return 0;
4414
4415err_out_free_res:
4416        if (h->transtable)
4417                iounmap(h->transtable);
4418        if (h->cfgtable)
4419                iounmap(h->cfgtable);
4420        if (h->vaddr)
4421                iounmap(h->vaddr);
4422        pci_disable_device(h->pdev);
4423        pci_release_regions(h->pdev);
4424        return err;
4425}
4426
4427static void hpsa_hba_inquiry(struct ctlr_info *h)
4428{
4429        int rc;
4430
4431#define HBA_INQUIRY_BYTE_COUNT 64
4432        h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
4433        if (!h->hba_inquiry_data)
4434                return;
4435        rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
4436                h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
4437        if (rc != 0) {
4438                kfree(h->hba_inquiry_data);
4439                h->hba_inquiry_data = NULL;
4440        }
4441}
4442
4443static int hpsa_init_reset_devices(struct pci_dev *pdev)
4444{
4445        int rc, i;
4446
4447        if (!reset_devices)
4448                return 0;
4449
4450        /* Reset the controller with a PCI power-cycle or via doorbell */
4451        rc = hpsa_kdump_hard_reset_controller(pdev);
4452
4453        /* -ENOTSUPP here means we cannot reset the controller
4454         * but it's already (and still) up and running in
4455         * "performant mode".  Or, it might be 640x, which can't reset
4456         * due to concerns about shared bbwc between 6402/6404 pair.
4457         */
4458        if (rc == -ENOTSUPP)
4459                return rc; /* just try to do the kdump anyhow. */
4460        if (rc)
4461                return -ENODEV;
4462
4463        /* Now try to get the controller to respond to a no-op */
4464        dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
4465        for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
4466                if (hpsa_noop(pdev) == 0)
4467                        break;
4468                else
4469                        dev_warn(&pdev->dev, "no-op failed%s\n",
4470                                        (i < 11 ? "; re-trying" : ""));
4471        }
4472        return 0;
4473}
4474
4475static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
4476{
4477        h->cmd_pool_bits = kzalloc(
4478                DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
4479                sizeof(unsigned long), GFP_KERNEL);
4480        h->cmd_pool = pci_alloc_consistent(h->pdev,
4481                    h->nr_cmds * sizeof(*h->cmd_pool),
4482                    &(h->cmd_pool_dhandle));
4483        h->errinfo_pool = pci_alloc_consistent(h->pdev,
4484                    h->nr_cmds * sizeof(*h->errinfo_pool),
4485                    &(h->errinfo_pool_dhandle));
4486        if ((h->cmd_pool_bits == NULL)
4487            || (h->cmd_pool == NULL)
4488            || (h->errinfo_pool == NULL)) {
4489                dev_err(&h->pdev->dev, "out of memory in %s", __func__);
4490                return -ENOMEM;
4491        }
4492        return 0;
4493}
4494
4495static void hpsa_free_cmd_pool(struct ctlr_info *h)
4496{
4497        kfree(h->cmd_pool_bits);
4498        if (h->cmd_pool)
4499                pci_free_consistent(h->pdev,
4500                            h->nr_cmds * sizeof(struct CommandList),
4501                            h->cmd_pool, h->cmd_pool_dhandle);
4502        if (h->errinfo_pool)
4503                pci_free_consistent(h->pdev,
4504                            h->nr_cmds * sizeof(struct ErrorInfo),
4505                            h->errinfo_pool,
4506                            h->errinfo_pool_dhandle);
4507}
4508
4509static int hpsa_request_irq(struct ctlr_info *h,
4510        irqreturn_t (*msixhandler)(int, void *),
4511        irqreturn_t (*intxhandler)(int, void *))
4512{
4513        int rc, i;
4514
4515        /*
4516         * initialize h->q[x] = x so that interrupt handlers know which
4517         * queue to process.
4518         */
4519        for (i = 0; i < MAX_REPLY_QUEUES; i++)
4520                h->q[i] = (u8) i;
4521
4522        if (h->intr_mode == PERF_MODE_INT && h->msix_vector) {
4523                /* If performant mode and MSI-X, use multiple reply queues */
4524                for (i = 0; i < MAX_REPLY_QUEUES; i++)
4525                        rc = request_irq(h->intr[i], msixhandler,
4526                                        0, h->devname,
4527                                        &h->q[i]);
4528        } else {
4529                /* Use single reply pool */
4530                if (h->msix_vector || h->msi_vector) {
4531                        rc = request_irq(h->intr[h->intr_mode],
4532                                msixhandler, 0, h->devname,
4533                                &h->q[h->intr_mode]);
4534                } else {
4535                        rc = request_irq(h->intr[h->intr_mode],
4536                                intxhandler, IRQF_SHARED, h->devname,
4537                                &h->q[h->intr_mode]);
4538                }
4539        }
4540        if (rc) {
4541                dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
4542                       h->intr[h->intr_mode], h->devname);
4543                return -ENODEV;
4544        }
4545        return 0;
4546}
4547
4548static int hpsa_kdump_soft_reset(struct ctlr_info *h)
4549{
4550        if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
4551                HPSA_RESET_TYPE_CONTROLLER)) {
4552                dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4553                return -EIO;
4554        }
4555
4556        dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4557        if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4558                dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4559                return -1;
4560        }
4561
4562        dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4563        if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4564                dev_warn(&h->pdev->dev, "Board failed to become ready "
4565                        "after soft reset.\n");
4566                return -1;
4567        }
4568
4569        return 0;
4570}
4571
4572static void free_irqs(struct ctlr_info *h)
4573{
4574        int i;
4575
4576        if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
4577                /* Single reply queue, only one irq to free */
4578                i = h->intr_mode;
4579                free_irq(h->intr[i], &h->q[i]);
4580                return;
4581        }
4582
4583        for (i = 0; i < MAX_REPLY_QUEUES; i++)
4584                free_irq(h->intr[i], &h->q[i]);
4585}
4586
4587static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h)
4588{
4589        free_irqs(h);
4590#ifdef CONFIG_PCI_MSI
4591        if (h->msix_vector) {
4592                if (h->pdev->msix_enabled)
4593                        pci_disable_msix(h->pdev);
4594        } else if (h->msi_vector) {
4595                if (h->pdev->msi_enabled)
4596                        pci_disable_msi(h->pdev);
4597        }
4598#endif /* CONFIG_PCI_MSI */
4599}
4600
4601static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
4602{
4603        hpsa_free_irqs_and_disable_msix(h);
4604        hpsa_free_sg_chain_blocks(h);
4605        hpsa_free_cmd_pool(h);
4606        kfree(h->blockFetchTable);
4607        pci_free_consistent(h->pdev, h->reply_pool_size,
4608                h->reply_pool, h->reply_pool_dhandle);
4609        if (h->vaddr)
4610                iounmap(h->vaddr);
4611        if (h->transtable)
4612                iounmap(h->transtable);
4613        if (h->cfgtable)
4614                iounmap(h->cfgtable);
4615        pci_release_regions(h->pdev);
4616        kfree(h);
4617}
4618
4619static void remove_ctlr_from_lockup_detector_list(struct ctlr_info *h)
4620{
4621        assert_spin_locked(&lockup_detector_lock);
4622        if (!hpsa_lockup_detector)
4623                return;
4624        if (h->lockup_detected)
4625                return; /* already stopped the lockup detector */
4626        list_del(&h->lockup_list);
4627}
4628
4629/* Called when controller lockup detected. */
4630static void fail_all_cmds_on_list(struct ctlr_info *h, struct list_head *list)
4631{
4632        struct CommandList *c = NULL;
4633
4634        assert_spin_locked(&h->lock);
4635        /* Mark all outstanding commands as failed and complete them. */
4636        while (!list_empty(list)) {
4637                c = list_entry(list->next, struct CommandList, list);
4638                c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4639                finish_cmd(c);
4640        }
4641}
4642
4643static void controller_lockup_detected(struct ctlr_info *h)
4644{
4645        unsigned long flags;
4646
4647        assert_spin_locked(&lockup_detector_lock);
4648        remove_ctlr_from_lockup_detector_list(h);
4649        h->access.set_intr_mask(h, HPSA_INTR_OFF);
4650        spin_lock_irqsave(&h->lock, flags);
4651        h->lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
4652        spin_unlock_irqrestore(&h->lock, flags);
4653        dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x\n",
4654                        h->lockup_detected);
4655        pci_disable_device(h->pdev);
4656        spin_lock_irqsave(&h->lock, flags);
4657        fail_all_cmds_on_list(h, &h->cmpQ);
4658        fail_all_cmds_on_list(h, &h->reqQ);
4659        spin_unlock_irqrestore(&h->lock, flags);
4660}
4661
4662static void detect_controller_lockup(struct ctlr_info *h)
4663{
4664        u64 now;
4665        u32 heartbeat;
4666        unsigned long flags;
4667
4668        assert_spin_locked(&lockup_detector_lock);
4669        now = get_jiffies_64();
4670        /* If we've received an interrupt recently, we're ok. */
4671        if (time_after64(h->last_intr_timestamp +
4672                                (h->heartbeat_sample_interval), now))
4673                return;
4674
4675        /*
4676         * If we've already checked the heartbeat recently, we're ok.
4677         * This could happen if someone sends us a signal. We
4678         * otherwise don't care about signals in this thread.
4679         */
4680        if (time_after64(h->last_heartbeat_timestamp +
4681                                (h->heartbeat_sample_interval), now))
4682                return;
4683
4684        /* If heartbeat has not changed since we last looked, we're not ok. */
4685        spin_lock_irqsave(&h->lock, flags);
4686        heartbeat = readl(&h->cfgtable->HeartBeat);
4687        spin_unlock_irqrestore(&h->lock, flags);
4688        if (h->last_heartbeat == heartbeat) {
4689                controller_lockup_detected(h);
4690                return;
4691        }
4692
4693        /* We're ok. */
4694        h->last_heartbeat = heartbeat;
4695        h->last_heartbeat_timestamp = now;
4696}
4697
4698static int detect_controller_lockup_thread(void *notused)
4699{
4700        struct ctlr_info *h;
4701        unsigned long flags;
4702
4703        while (1) {
4704                struct list_head *this, *tmp;
4705
4706                schedule_timeout_interruptible(HEARTBEAT_SAMPLE_INTERVAL);
4707                if (kthread_should_stop())
4708                        break;
4709                spin_lock_irqsave(&lockup_detector_lock, flags);
4710                list_for_each_safe(this, tmp, &hpsa_ctlr_list) {
4711                        h = list_entry(this, struct ctlr_info, lockup_list);
4712                        detect_controller_lockup(h);
4713                }
4714                spin_unlock_irqrestore(&lockup_detector_lock, flags);
4715        }
4716        return 0;
4717}
4718
4719static void add_ctlr_to_lockup_detector_list(struct ctlr_info *h)
4720{
4721        unsigned long flags;
4722
4723        h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
4724        spin_lock_irqsave(&lockup_detector_lock, flags);
4725        list_add_tail(&h->lockup_list, &hpsa_ctlr_list);
4726        spin_unlock_irqrestore(&lockup_detector_lock, flags);
4727}
4728
4729static void start_controller_lockup_detector(struct ctlr_info *h)
4730{
4731        /* Start the lockup detector thread if not already started */
4732        if (!hpsa_lockup_detector) {
4733                spin_lock_init(&lockup_detector_lock);
4734                hpsa_lockup_detector =
4735                        kthread_run(detect_controller_lockup_thread,
4736                                                NULL, HPSA);
4737        }
4738        if (!hpsa_lockup_detector) {
4739                dev_warn(&h->pdev->dev,
4740                        "Could not start lockup detector thread\n");
4741                return;
4742        }
4743        add_ctlr_to_lockup_detector_list(h);
4744}
4745
4746static void stop_controller_lockup_detector(struct ctlr_info *h)
4747{
4748        unsigned long flags;
4749
4750        spin_lock_irqsave(&lockup_detector_lock, flags);
4751        remove_ctlr_from_lockup_detector_list(h);
4752        /* If the list of ctlr's to monitor is empty, stop the thread */
4753        if (list_empty(&hpsa_ctlr_list)) {
4754                spin_unlock_irqrestore(&lockup_detector_lock, flags);
4755                kthread_stop(hpsa_lockup_detector);
4756                spin_lock_irqsave(&lockup_detector_lock, flags);
4757                hpsa_lockup_detector = NULL;
4758        }
4759        spin_unlock_irqrestore(&lockup_detector_lock, flags);
4760}
4761
4762static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
4763{
4764        int dac, rc;
4765        struct ctlr_info *h;
4766        int try_soft_reset = 0;
4767        unsigned long flags;
4768
4769        if (number_of_controllers == 0)
4770                printk(KERN_INFO DRIVER_NAME "\n");
4771
4772        rc = hpsa_init_reset_devices(pdev);
4773        if (rc) {
4774                if (rc != -ENOTSUPP)
4775                        return rc;
4776                /* If the reset fails in a particular way (it has no way to do
4777                 * a proper hard reset, so returns -ENOTSUPP) we can try to do
4778                 * a soft reset once we get the controller configured up to the
4779                 * point that it can accept a command.
4780                 */
4781                try_soft_reset = 1;
4782                rc = 0;
4783        }
4784
4785reinit_after_soft_reset:
4786
4787        /* Command structures must be aligned on a 32-byte boundary because
4788         * the 5 lower bits of the address are used by the hardware. and by
4789         * the driver.  See comments in hpsa.h for more info.
4790         */
4791#define COMMANDLIST_ALIGNMENT 32
4792        BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4793        h = kzalloc(sizeof(*h), GFP_KERNEL);
4794        if (!h)
4795                return -ENOMEM;
4796
4797        h->pdev = pdev;
4798        h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4799        INIT_LIST_HEAD(&h->cmpQ);
4800        INIT_LIST_HEAD(&h->reqQ);
4801        spin_lock_init(&h->lock);
4802        spin_lock_init(&h->scan_lock);
4803        rc = hpsa_pci_init(h);
4804        if (rc != 0)
4805                goto clean1;
4806
4807        sprintf(h->devname, HPSA "%d", number_of_controllers);
4808        h->ctlr = number_of_controllers;
4809        number_of_controllers++;
4810
4811        /* configure PCI DMA stuff */
4812        rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4813        if (rc == 0) {
4814                dac = 1;
4815        } else {
4816                rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4817                if (rc == 0) {
4818                        dac = 0;
4819                } else {
4820                        dev_err(&pdev->dev, "no suitable DMA available\n");
4821                        goto clean1;
4822                }
4823        }
4824
4825        /* make sure the board interrupts are off */
4826        h->access.set_intr_mask(h, HPSA_INTR_OFF);
4827
4828        if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4829                goto clean2;
4830        dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
4831               h->devname, pdev->device,
4832               h->intr[h->intr_mode], dac ? "" : " not");
4833        if (hpsa_allocate_cmd_pool(h))
4834                goto clean4;
4835        if (hpsa_allocate_sg_chain_blocks(h))
4836                goto clean4;
4837        init_waitqueue_head(&h->scan_wait_queue);
4838        h->scan_finished = 1; /* no scan currently in progress */
4839
4840        pci_set_drvdata(pdev, h);
4841        h->ndevices = 0;
4842        h->scsi_host = NULL;
4843        spin_lock_init(&h->devlock);
4844        hpsa_put_ctlr_into_performant_mode(h);
4845
4846        /* At this point, the controller is ready to take commands.
4847         * Now, if reset_devices and the hard reset didn't work, try
4848         * the soft reset and see if that works.
4849         */
4850        if (try_soft_reset) {
4851
4852                /* This is kind of gross.  We may or may not get a completion
4853                 * from the soft reset command, and if we do, then the value
4854                 * from the fifo may or may not be valid.  So, we wait 10 secs
4855                 * after the reset throwing away any completions we get during
4856                 * that time.  Unregister the interrupt handler and register
4857                 * fake ones to scoop up any residual completions.
4858                 */
4859                spin_lock_irqsave(&h->lock, flags);
4860                h->access.set_intr_mask(h, HPSA_INTR_OFF);
4861                spin_unlock_irqrestore(&h->lock, flags);
4862                free_irqs(h);
4863                rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
4864                                        hpsa_intx_discard_completions);
4865                if (rc) {
4866                        dev_warn(&h->pdev->dev, "Failed to request_irq after "
4867                                "soft reset.\n");
4868                        goto clean4;
4869                }
4870
4871                rc = hpsa_kdump_soft_reset(h);
4872                if (rc)
4873                        /* Neither hard nor soft reset worked, we're hosed. */
4874                        goto clean4;
4875
4876                dev_info(&h->pdev->dev, "Board READY.\n");
4877                dev_info(&h->pdev->dev,
4878                        "Waiting for stale completions to drain.\n");
4879                h->access.set_intr_mask(h, HPSA_INTR_ON);
4880                msleep(10000);
4881                h->access.set_intr_mask(h, HPSA_INTR_OFF);
4882
4883                rc = controller_reset_failed(h->cfgtable);
4884                if (rc)
4885                        dev_info(&h->pdev->dev,
4886                                "Soft reset appears to have failed.\n");
4887
4888                /* since the controller's reset, we have to go back and re-init
4889                 * everything.  Easiest to just forget what we've done and do it
4890                 * all over again.
4891                 */
4892                hpsa_undo_allocations_after_kdump_soft_reset(h);
4893                try_soft_reset = 0;
4894                if (rc)
4895                        /* don't go to clean4, we already unallocated */
4896                        return -ENODEV;
4897
4898                goto reinit_after_soft_reset;
4899        }
4900
4901        /* Turn the interrupts on so we can service requests */
4902        h->access.set_intr_mask(h, HPSA_INTR_ON);
4903
4904        hpsa_hba_inquiry(h);
4905        hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
4906        start_controller_lockup_detector(h);
4907        return 1;
4908
4909clean4:
4910        hpsa_free_sg_chain_blocks(h);
4911        hpsa_free_cmd_pool(h);
4912        free_irqs(h);
4913clean2:
4914clean1:
4915        kfree(h);
4916        return rc;
4917}
4918
4919static void hpsa_flush_cache(struct ctlr_info *h)
4920{
4921        char *flush_buf;
4922        struct CommandList *c;
4923
4924        flush_buf = kzalloc(4, GFP_KERNEL);
4925        if (!flush_buf)
4926                return;
4927
4928        c = cmd_special_alloc(h);
4929        if (!c) {
4930                dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
4931                goto out_of_memory;
4932        }
4933        if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
4934                RAID_CTLR_LUNID, TYPE_CMD)) {
4935                goto out;
4936        }
4937        hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
4938        if (c->err_info->CommandStatus != 0)
4939out:
4940                dev_warn(&h->pdev->dev,
4941                        "error flushing cache on controller\n");
4942        cmd_special_free(h, c);
4943out_of_memory:
4944        kfree(flush_buf);
4945}
4946
4947static void hpsa_shutdown(struct pci_dev *pdev)
4948{
4949        struct ctlr_info *h;
4950
4951        h = pci_get_drvdata(pdev);
4952        /* Turn board interrupts off  and send the flush cache command
4953         * sendcmd will turn off interrupt, and send the flush...
4954         * To write all data in the battery backed cache to disks
4955         */
4956        hpsa_flush_cache(h);
4957        h->access.set_intr_mask(h, HPSA_INTR_OFF);
4958        hpsa_free_irqs_and_disable_msix(h);
4959}
4960
4961static void hpsa_free_device_info(struct ctlr_info *h)
4962{
4963        int i;
4964
4965        for (i = 0; i < h->ndevices; i++)
4966                kfree(h->dev[i]);
4967}
4968
4969static void hpsa_remove_one(struct pci_dev *pdev)
4970{
4971        struct ctlr_info *h;
4972
4973        if (pci_get_drvdata(pdev) == NULL) {
4974                dev_err(&pdev->dev, "unable to remove device\n");
4975                return;
4976        }
4977        h = pci_get_drvdata(pdev);
4978        stop_controller_lockup_detector(h);
4979        hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
4980        hpsa_shutdown(pdev);
4981        iounmap(h->vaddr);
4982        iounmap(h->transtable);
4983        iounmap(h->cfgtable);
4984        hpsa_free_device_info(h);
4985        hpsa_free_sg_chain_blocks(h);
4986        pci_free_consistent(h->pdev,
4987                h->nr_cmds * sizeof(struct CommandList),
4988                h->cmd_pool, h->cmd_pool_dhandle);
4989        pci_free_consistent(h->pdev,
4990                h->nr_cmds * sizeof(struct ErrorInfo),
4991                h->errinfo_pool, h->errinfo_pool_dhandle);
4992        pci_free_consistent(h->pdev, h->reply_pool_size,
4993                h->reply_pool, h->reply_pool_dhandle);
4994        kfree(h->cmd_pool_bits);
4995        kfree(h->blockFetchTable);
4996        kfree(h->hba_inquiry_data);
4997        pci_disable_device(pdev);
4998        pci_release_regions(pdev);
4999        pci_set_drvdata(pdev, NULL);
5000        kfree(h);
5001}
5002
5003static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
5004        __attribute__((unused)) pm_message_t state)
5005{
5006        return -ENOSYS;
5007}
5008
5009static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
5010{
5011        return -ENOSYS;
5012}
5013
5014static struct pci_driver hpsa_pci_driver = {
5015        .name = HPSA,
5016        .probe = hpsa_init_one,
5017        .remove = hpsa_remove_one,
5018        .id_table = hpsa_pci_device_id, /* id_table */
5019        .shutdown = hpsa_shutdown,
5020        .suspend = hpsa_suspend,
5021        .resume = hpsa_resume,
5022};
5023
5024/* Fill in bucket_map[], given nsgs (the max number of
5025 * scatter gather elements supported) and bucket[],
5026 * which is an array of 8 integers.  The bucket[] array
5027 * contains 8 different DMA transfer sizes (in 16
5028 * byte increments) which the controller uses to fetch
5029 * commands.  This function fills in bucket_map[], which
5030 * maps a given number of scatter gather elements to one of
5031 * the 8 DMA transfer sizes.  The point of it is to allow the
5032 * controller to only do as much DMA as needed to fetch the
5033 * command, with the DMA transfer size encoded in the lower
5034 * bits of the command address.
5035 */
5036static void  calc_bucket_map(int bucket[], int num_buckets,
5037        int nsgs, int *bucket_map)
5038{
5039        int i, j, b, size;
5040
5041        /* even a command with 0 SGs requires 4 blocks */
5042#define MINIMUM_TRANSFER_BLOCKS 4
5043#define NUM_BUCKETS 8
5044        /* Note, bucket_map must have nsgs+1 entries. */
5045        for (i = 0; i <= nsgs; i++) {
5046                /* Compute size of a command with i SG entries */
5047                size = i + MINIMUM_TRANSFER_BLOCKS;
5048                b = num_buckets; /* Assume the biggest bucket */
5049                /* Find the bucket that is just big enough */
5050                for (j = 0; j < 8; j++) {
5051                        if (bucket[j] >= size) {
5052                                b = j;
5053                                break;
5054                        }
5055                }
5056                /* for a command with i SG entries, use bucket b. */
5057                bucket_map[i] = b;
5058        }
5059}
5060
5061static void hpsa_enter_performant_mode(struct ctlr_info *h, u32 use_short_tags)
5062{
5063        int i;
5064        unsigned long register_value;
5065
5066        /* This is a bit complicated.  There are 8 registers on
5067         * the controller which we write to to tell it 8 different
5068         * sizes of commands which there may be.  It's a way of
5069         * reducing the DMA done to fetch each command.  Encoded into
5070         * each command's tag are 3 bits which communicate to the controller
5071         * which of the eight sizes that command fits within.  The size of
5072         * each command depends on how many scatter gather entries there are.
5073         * Each SG entry requires 16 bytes.  The eight registers are programmed
5074         * with the number of 16-byte blocks a command of that size requires.
5075         * The smallest command possible requires 5 such 16 byte blocks.
5076         * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
5077         * blocks.  Note, this only extends to the SG entries contained
5078         * within the command block, and does not extend to chained blocks
5079         * of SG elements.   bft[] contains the eight values we write to
5080         * the registers.  They are not evenly distributed, but have more
5081         * sizes for small commands, and fewer sizes for larger commands.
5082         */
5083        int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
5084        BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
5085        /*  5 = 1 s/g entry or 4k
5086         *  6 = 2 s/g entry or 8k
5087         *  8 = 4 s/g entry or 1