drivers/scsi/hpsa.h

   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 #ifndef HPSA_H
  22 #define HPSA_H
  23
  24 #include <scsi/scsicam.h>
  25
  26 #define IO_OK           0
  27 #define IO_ERROR        1
  28
  29 struct ctlr_info;
  30
  31 struct access_method {
  32         void (*submit_command)(struct ctlr_info *h,
  33                 struct CommandList *c);
  34         void (*set_intr_mask)(struct ctlr_info *h, unsigned long val);
  35         unsigned long (*fifo_full)(struct ctlr_info *h);
  36         bool (*intr_pending)(struct ctlr_info *h);
  37         unsigned long (*command_completed)(struct ctlr_info *h, u8 q);
  38 };
  39
  40 struct hpsa_scsi_dev_t {
  41         int devtype;
  42         int bus, target, lun;           /* as presented to the OS */
  43         unsigned char scsi3addr[8];     /* as presented to the HW */
  44 #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
  45         unsigned char device_id[16];    /* from inquiry pg. 0x83 */
  46         unsigned char vendor[8];        /* bytes 8-15 of inquiry data */
  47         unsigned char model[16];        /* bytes 16-31 of inquiry data */
  48         unsigned char raid_level;       /* from inquiry page 0xC1 */
  49 };
  50
  51 struct reply_pool {
  52         u64 *head;
  53         size_t size;
  54         u8 wraparound;
  55         u32 current_entry;
  56 };
  57
  58 struct ctlr_info {
  59         int     ctlr;
  60         char    devname[8];
  61         char    *product_name;
  62         struct pci_dev *pdev;
  63         u32     board_id;
  64         void __iomem *vaddr;
  65         unsigned long paddr;
  66         int     nr_cmds; /* Number of commands allowed on this controller */
  67         struct CfgTable __iomem *cfgtable;
  68         int     interrupts_enabled;
  69         int     major;
  70         int     max_commands;
  71         int     commands_outstanding;
  72         int     max_outstanding; /* Debug */
  73         int     usage_count;  /* number of opens all all minor devices */
  74 #       define PERF_MODE_INT    0
  75 #       define DOORBELL_INT     1
  76 #       define SIMPLE_MODE_INT  2
  77 #       define MEMQ_MODE_INT    3
  78         unsigned int intr[MAX_REPLY_QUEUES];
  79         unsigned int msix_vector;
  80         unsigned int msi_vector;
  81         int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */
  82         struct access_method access;
  83
  84         /* queue and queue Info */
  85         struct list_head reqQ;
  86         struct list_head cmpQ;
  87         unsigned int Qdepth;
  88         unsigned int maxSG;
  89         spinlock_t lock;
  90         int maxsgentries;
  91         u8 max_cmd_sg_entries;
  92         int chainsize;
  93         struct SGDescriptor **cmd_sg_list;
  94
  95         /* pointers to command and error info pool */
  96         struct CommandList      *cmd_pool;
  97         dma_addr_t              cmd_pool_dhandle;
  98         struct ErrorInfo        *errinfo_pool;
  99         dma_addr_t              errinfo_pool_dhandle;
 100         unsigned long           *cmd_pool_bits;
 101         int                     nr_allocs;
 102         int                     nr_frees;
 103         int                     scan_finished;
 104         spinlock_t              scan_lock;
 105         wait_queue_head_t       scan_wait_queue;
 106
 107         struct Scsi_Host *scsi_host;
 108         spinlock_t devlock; /* to protect hba[ctlr]->dev[];  */
 109         int ndevices; /* number of used elements in .dev[] array. */
 110         struct hpsa_scsi_dev_t *dev[HPSA_MAX_DEVICES];
 111         /*
 112          * Performant mode tables.
 113          */
 114         u32 trans_support;
 115         u32 trans_offset;
 116         struct TransTable_struct *transtable;
 117         unsigned long transMethod;
 118
 119         /*
 120          * Performant mode completion buffers
 121          */
 122         u64 *reply_pool;
 123         size_t reply_pool_size;
 124         struct reply_pool reply_queue[MAX_REPLY_QUEUES];
 125         u8 nreply_queues;
 126         dma_addr_t reply_pool_dhandle;
 127         u32 *blockFetchTable;
 128         unsigned char *hba_inquiry_data;
 129         u64 last_intr_timestamp;
 130         u32 last_heartbeat;
 131         u64 last_heartbeat_timestamp;
 132         u32 heartbeat_sample_interval;
 133         atomic_t firmware_flash_in_progress;
 134         u32 lockup_detected;
 135         struct list_head lockup_list;
 136         /* Address of h->q[x] is passed to intr handler to know which queue */
 137         u8 q[MAX_REPLY_QUEUES];
 138         u32 TMFSupportFlags; /* cache what task mgmt funcs are supported. */
 139 #define HPSATMF_BITS_SUPPORTED  (1 << 0)
 140 #define HPSATMF_PHYS_LUN_RESET  (1 << 1)
 141 #define HPSATMF_PHYS_NEX_RESET  (1 << 2)
 142 #define HPSATMF_PHYS_TASK_ABORT (1 << 3)
 143 #define HPSATMF_PHYS_TSET_ABORT (1 << 4)
 144 #define HPSATMF_PHYS_CLEAR_ACA  (1 << 5)
 145 #define HPSATMF_PHYS_CLEAR_TSET (1 << 6)
 146 #define HPSATMF_PHYS_QRY_TASK   (1 << 7)
 147 #define HPSATMF_PHYS_QRY_TSET   (1 << 8)
 148 #define HPSATMF_PHYS_QRY_ASYNC  (1 << 9)
 149 #define HPSATMF_MASK_SUPPORTED  (1 << 16)
 150 #define HPSATMF_LOG_LUN_RESET   (1 << 17)
 151 #define HPSATMF_LOG_NEX_RESET   (1 << 18)
 152 #define HPSATMF_LOG_TASK_ABORT  (1 << 19)
 153 #define HPSATMF_LOG_TSET_ABORT  (1 << 20)
 154 #define HPSATMF_LOG_CLEAR_ACA   (1 << 21)
 155 #define HPSATMF_LOG_CLEAR_TSET  (1 << 22)
 156 #define HPSATMF_LOG_QRY_TASK    (1 << 23)
 157 #define HPSATMF_LOG_QRY_TSET    (1 << 24)
 158 #define HPSATMF_LOG_QRY_ASYNC   (1 << 25)
 159 };
 160 #define HPSA_ABORT_MSG 0
 161 #define HPSA_DEVICE_RESET_MSG 1
 162 #define HPSA_RESET_TYPE_CONTROLLER 0x00
 163 #define HPSA_RESET_TYPE_BUS 0x01
 164 #define HPSA_RESET_TYPE_TARGET 0x03
 165 #define HPSA_RESET_TYPE_LUN 0x04
 166 #define HPSA_MSG_SEND_RETRY_LIMIT 10
 167 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000)
 168
 169 /* Maximum time in seconds driver will wait for command completions
 170  * when polling before giving up.
 171  */
 172 #define HPSA_MAX_POLL_TIME_SECS (20)
 173
 174 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
 175  * how many times to retry TEST UNIT READY on a device
 176  * while waiting for it to become ready before giving up.
 177  * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
 178  * between sending TURs while waiting for a device
 179  * to become ready.
 180  */
 181 #define HPSA_TUR_RETRY_LIMIT (20)
 182 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
 183
 184 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
 185  * to become ready, in seconds, before giving up on it.
 186  * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
 187  * between polling the board to see if it is ready, in
 188  * milliseconds.  HPSA_BOARD_READY_POLL_INTERVAL and
 189  * HPSA_BOARD_READY_ITERATIONS are derived from those.
 190  */
 191 #define HPSA_BOARD_READY_WAIT_SECS (120)
 192 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100)
 193 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
 194 #define HPSA_BOARD_READY_POLL_INTERVAL \
 195         ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
 196 #define HPSA_BOARD_READY_ITERATIONS \
 197         ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
 198                 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
 199 #define HPSA_BOARD_NOT_READY_ITERATIONS \
 200         ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \
 201                 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
 202 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
 203 #define HPSA_POST_RESET_NOOP_RETRIES (12)
 204
 205 /*  Defining the diffent access_menthods */
 206 /*
 207  * Memory mapped FIFO interface (SMART 53xx cards)
 208  */
 209 #define SA5_DOORBELL    0x20
 210 #define SA5_REQUEST_PORT_OFFSET 0x40
 211 #define SA5_REPLY_INTR_MASK_OFFSET      0x34
 212 #define SA5_REPLY_PORT_OFFSET           0x44
 213 #define SA5_INTR_STATUS         0x30
 214 #define SA5_SCRATCHPAD_OFFSET   0xB0
 215
 216 #define SA5_CTCFG_OFFSET        0xB4
 217 #define SA5_CTMEM_OFFSET        0xB8
 218
 219 #define SA5_INTR_OFF            0x08
 220 #define SA5B_INTR_OFF           0x04
 221 #define SA5_INTR_PENDING        0x08
 222 #define SA5B_INTR_PENDING       0x04
 223 #define FIFO_EMPTY              0xffffffff
 224 #define HPSA_FIRMWARE_READY     0xffff0000 /* value in scratchpad register */
 225
 226 #define HPSA_ERROR_BIT          0x02
 227
 228 /* Performant mode flags */
 229 #define SA5_PERF_INTR_PENDING   0x04
 230 #define SA5_PERF_INTR_OFF       0x05
 231 #define SA5_OUTDB_STATUS_PERF_BIT       0x01
 232 #define SA5_OUTDB_CLEAR_PERF_BIT        0x01
 233 #define SA5_OUTDB_CLEAR         0xA0
 234 #define SA5_OUTDB_CLEAR_PERF_BIT        0x01
 235 #define SA5_OUTDB_STATUS        0x9C
 236
 237
 238 #define HPSA_INTR_ON    1
 239 #define HPSA_INTR_OFF   0
 240 /*
 241         Send the command to the hardware
 242 */
 243 static void SA5_submit_command(struct ctlr_info *h,
 244         struct CommandList *c)
 245 {
 246         dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
 247                 c->Header.Tag.lower);
 248         writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 249         (void) readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
 250 }
 251
 252 /*
 253  *  This card is the opposite of the other cards.
 254  *   0 turns interrupts on...
 255  *   0x08 turns them off...
 256  */
 257 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
 258 {
 259         if (val) { /* Turn interrupts on */
 260                 h->interrupts_enabled = 1;
 261                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 262                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 263         } else { /* Turn them off */
 264                 h->interrupts_enabled = 0;
 265                 writel(SA5_INTR_OFF,
 266                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 267                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 268         }
 269 }
 270
 271 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
 272 {
 273         if (val) { /* turn on interrupts */
 274                 h->interrupts_enabled = 1;
 275                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 276                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 277         } else {
 278                 h->interrupts_enabled = 0;
 279                 writel(SA5_PERF_INTR_OFF,
 280                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 281                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 282         }
 283 }
 284
 285 static unsigned long SA5_performant_completed(struct ctlr_info *h, u8 q)
 286 {
 287         struct reply_pool *rq = &h->reply_queue[q];
 288         unsigned long flags, register_value = FIFO_EMPTY;
 289
 290         /* msi auto clears the interrupt pending bit. */
 291         if (!(h->msi_vector || h->msix_vector)) {
 292                 /* flush the controller write of the reply queue by reading
 293                  * outbound doorbell status register.
 294                  */
 295                 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
 296                 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
 297                 /* Do a read in order to flush the write to the controller
 298                  * (as per spec.)
 299                  */
 300                 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
 301         }
 302
 303         if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
 304                 register_value = rq->head[rq->current_entry];
 305                 rq->current_entry++;
 306                 spin_lock_irqsave(&h->lock, flags);
 307                 h->commands_outstanding--;
 308                 spin_unlock_irqrestore(&h->lock, flags);
 309         } else {
 310                 register_value = FIFO_EMPTY;
 311         }
 312         /* Check for wraparound */
 313         if (rq->current_entry == h->max_commands) {
 314                 rq->current_entry = 0;
 315                 rq->wraparound ^= 1;
 316         }
 317         return register_value;
 318 }
 319
 320 /*
 321  *  Returns true if fifo is full.
 322  *
 323  */
 324 static unsigned long SA5_fifo_full(struct ctlr_info *h)
 325 {
 326         if (h->commands_outstanding >= h->max_commands)
 327                 return 1;
 328         else
 329                 return 0;
 330
 331 }
 332 /*
 333  *   returns value read from hardware.
 334  *     returns FIFO_EMPTY if there is nothing to read
 335  */
 336 static unsigned long SA5_completed(struct ctlr_info *h,
 337         __attribute__((unused)) u8 q)
 338 {
 339         unsigned long register_value
 340                 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
 341         unsigned long flags;
 342
 343         if (register_value != FIFO_EMPTY) {
 344                 spin_lock_irqsave(&h->lock, flags);
 345                 h->commands_outstanding--;
 346                 spin_unlock_irqrestore(&h->lock, flags);
 347         }
 348
 349 #ifdef HPSA_DEBUG
 350         if (register_value != FIFO_EMPTY)
 351                 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
 352                         register_value);
 353         else
 354                 dev_dbg(&h->pdev->dev, "FIFO Empty read\n");
 355 #endif
 356
 357         return register_value;
 358 }
 359 /*
 360  *      Returns true if an interrupt is pending..
 361  */
 362 static bool SA5_intr_pending(struct ctlr_info *h)
 363 {
 364         unsigned long register_value  =
 365                 readl(h->vaddr + SA5_INTR_STATUS);
 366         dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
 367         return register_value & SA5_INTR_PENDING;
 368 }
 369
 370 static bool SA5_performant_intr_pending(struct ctlr_info *h)
 371 {
 372         unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
 373
 374         if (!register_value)
 375                 return false;
 376
 377         if (h->msi_vector || h->msix_vector)
 378                 return true;
 379
 380         /* Read outbound doorbell to flush */
 381         register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
 382         return register_value & SA5_OUTDB_STATUS_PERF_BIT;
 383 }
 384
 385 static struct access_method SA5_access = {
 386         SA5_submit_command,
 387         SA5_intr_mask,
 388         SA5_fifo_full,
 389         SA5_intr_pending,
 390         SA5_completed,
 391 };
 392
 393 static struct access_method SA5_performant_access = {
 394         SA5_submit_command,
 395         SA5_performant_intr_mask,
 396         SA5_fifo_full,
 397         SA5_performant_intr_pending,
 398         SA5_performant_completed,
 399 };
 400
 401 struct board_type {
 402         u32     board_id;
 403         char    *product_name;
 404         struct access_method *access;
 405 };
 406
 407 #endif /* HPSA_H */
 408