LXR linux/drivers/scsi/csiostor/csio

   1/*
   2 * This file is part of the Chelsio FCoE driver for Linux.
   3 *
   4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
   5 *
   6 * This software is available to you under a choice of one of two
   7 * licenses.  You may choose to be licensed under the terms of the GNU
   8 * General Public License (GPL) Version 2, available from the file
   9 * COPYING in the main directory of this source tree, or the
  10 * OpenIB.org BSD license below:
  11 *
  12 *     Redistribution and use in source and binary forms, with or
  13 *     without modification, are permitted provided that the following
  14 *     conditions are met:
  15 *
  16 *      - Redistributions of source code must retain the above
  17 *        copyright notice, this list of conditions and the following
  18 *        disclaimer.
  19 *
  20 *      - Redistributions in binary form must reproduce the above
  21 *        copyright notice, this list of conditions and the following
  22 *        disclaimer in the documentation and/or other materials
  23 *        provided with the distribution.
  24 *
  25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32 * SOFTWARE.
  33 */
  34
  35#ifndef __CSIO_DEFS_H__
  36#define __CSIO_DEFS_H__
  37
  38#include <linux/kernel.h>
  39#include <linux/stddef.h>
  40#include <linux/timer.h>
  41#include <linux/list.h>
  42#include <linux/bug.h>
  43#include <linux/pci.h>
  44#include <linux/jiffies.h>
  45
  46#define CSIO_INVALID_IDX                0xFFFFFFFF
  47#define CSIO_INC_STATS(elem, val)       ((elem)->stats.val++)
  48#define CSIO_DEC_STATS(elem, val)       ((elem)->stats.val--)
  49#define CSIO_VALID_WWN(__n)             ((*__n >> 4) == 0x5 ? true : false)
  50#define CSIO_DID_MASK                   0xFFFFFF
  51#define CSIO_WORD_TO_BYTE               4
  52
  53#ifndef readq
  54static inline u64 readq(void __iomem *addr)
  55{
  56        return readl(addr) + ((u64)readl(addr + 4) << 32);
  57}
  58
  59static inline void writeq(u64 val, void __iomem *addr)
  60{
  61        writel(val, addr);
  62        writel(val >> 32, addr + 4);
  63}
  64#endif
  65
  66static inline int
  67csio_list_deleted(struct list_head *list)
  68{
  69        return ((list->next == list) && (list->prev == list));
  70}
  71
  72#define csio_list_next(elem)    (((struct list_head *)(elem))->next)
  73#define csio_list_prev(elem)    (((struct list_head *)(elem))->prev)
  74
  75/* State machine */
  76typedef void (*csio_sm_state_t)(void *, uint32_t);
  77
  78struct csio_sm {
  79        struct list_head        sm_list;
  80        csio_sm_state_t         sm_state;
  81};
  82
  83static inline void
  84csio_set_state(void *smp, void *state)
  85{
  86        ((struct csio_sm *)smp)->sm_state = (csio_sm_state_t)state;
  87}
  88
  89static inline void
  90csio_init_state(struct csio_sm *smp, void *state)
  91{
  92        csio_set_state(smp, state);
  93}
  94
  95static inline void
  96csio_post_event(void *smp, uint32_t evt)
  97{
  98        ((struct csio_sm *)smp)->sm_state(smp, evt);
  99}
 100
 101static inline csio_sm_state_t
 102csio_get_state(void *smp)
 103{
 104        return ((struct csio_sm *)smp)->sm_state;
 105}
 106
 107static inline bool
 108csio_match_state(void *smp, void *state)
 109{
 110        return (csio_get_state(smp) == (csio_sm_state_t)state);
 111}
 112
 113#define CSIO_ASSERT(cond)               BUG_ON(!(cond))
 114
 115#ifdef __CSIO_DEBUG__
 116#define CSIO_DB_ASSERT(__c)             CSIO_ASSERT((__c))
 117#else
 118#define CSIO_DB_ASSERT(__c)
 119#endif
 120
 121#endif /* ifndef __CSIO_DEFS_H__ */
 122