drivers/scsi/qla2xxx/qla_inline.h

   1 /*
   2  *                  QLOGIC LINUX SOFTWARE
   3  *
   4  * QLogic ISP2x00 device driver for Linux 2.6.x
   5  * Copyright (C) 2003-2005 QLogic Corporation
   6  * (www.qlogic.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  */
  19
  20
  21 static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *);
  22 /*
  23  * qla2x00_debounce_register
  24  *      Debounce register.
  25  *
  26  * Input:
  27  *      port = register address.
  28  *
  29  * Returns:
  30  *      register value.
  31  */
  32 static __inline__ uint16_t
  33 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
  34 {
  35         volatile uint16_t first;
  36         volatile uint16_t second;
  37
  38         do {
  39                 first = RD_REG_WORD(addr);
  40                 barrier();
  41                 cpu_relax();
  42                 second = RD_REG_WORD(addr);
  43         } while (first != second);
  44
  45         return (first);
  46 }
  47
  48 static __inline__ int qla2x00_normalize_dma_addr(
  49     dma_addr_t *e_addr,  uint32_t *e_len,
  50     dma_addr_t *ne_addr, uint32_t *ne_len);
  51
  52 /**
  53  * qla2x00_normalize_dma_addr() - Normalize an DMA address.
  54  * @e_addr: Raw DMA address
  55  * @e_len: Raw DMA length
  56  * @ne_addr: Normalized second DMA address
  57  * @ne_len: Normalized second DMA length
  58  *
  59  * If the address does not span a 4GB page boundary, the contents of @ne_addr
  60  * and @ne_len are undefined.  @e_len is updated to reflect a normalization.
  61  *
  62  * Example:
  63  *
  64  *      ffffabc0ffffeeee        (e_addr) start of DMA address
  65  *      0000000020000000        (e_len)  length of DMA transfer
  66  *      ffffabc11fffeeed        end of DMA transfer
  67  *
  68  * Is the 4GB boundary crossed?
  69  *
  70  *      ffffabc0ffffeeee        (e_addr)
  71  *      ffffabc11fffeeed        (e_addr + e_len - 1)
  72  *      00000001e0000003        ((e_addr ^ (e_addr + e_len - 1))
  73  *      0000000100000000        ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff)
  74  *
  75  * Compute start of second DMA segment:
  76  *
  77  *      ffffabc0ffffeeee        (e_addr)
  78  *      ffffabc1ffffeeee        (0x100000000 + e_addr)
  79  *      ffffabc100000000        (0x100000000 + e_addr) & ~(0xffffffff)
  80  *      ffffabc100000000        (ne_addr)
  81  *
  82  * Compute length of second DMA segment:
  83  *
  84  *      00000000ffffeeee        (e_addr & 0xffffffff)
  85  *      0000000000001112        (0x100000000 - (e_addr & 0xffffffff))
  86  *      000000001fffeeee        (e_len - (0x100000000 - (e_addr & 0xffffffff))
  87  *      000000001fffeeee        (ne_len)
  88  *
  89  * Adjust length of first DMA segment
  90  *
  91  *      0000000020000000        (e_len)
  92  *      0000000000001112        (e_len - ne_len)
  93  *      0000000000001112        (e_len)
  94  *
  95  * Returns non-zero if the specified address was normalized, else zero.
  96  */
  97 static __inline__ int
  98 qla2x00_normalize_dma_addr(
  99     dma_addr_t *e_addr,  uint32_t *e_len,
 100     dma_addr_t *ne_addr, uint32_t *ne_len)
 101 {
 102         int normalized;
 103
 104         normalized = 0;
 105         if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) {
 106                 /* Compute normalized crossed address and len */
 107                 *ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL);
 108                 *ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL));
 109                 *e_len -= *ne_len;
 110
 111                 normalized++;
 112         }
 113         return (normalized);
 114 }
 115
 116 static __inline__ void qla2x00_poll(scsi_qla_host_t *);
 117 static inline void
 118 qla2x00_poll(scsi_qla_host_t *ha)
 119 {
 120         ha->isp_ops.intr_handler(0, ha, NULL);
 121 }
 122
 123 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
 124 /*
 125  * This routine will wait for fabric devices for
 126  * the reset delay.
 127  */
 128 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
 129 {
 130         uint16_t        fw_state;
 131
 132         qla2x00_get_firmware_state(ha, &fw_state);
 133 }
 134
 135 /**
 136  * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
 137  * @ha: HA context
 138  * @ha_locked: is function called with the hardware lock
 139  *
 140  * Returns non-zero if a failure occured, else zero.
 141  */
 142 static inline int
 143 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
 144 {
 145         /* Send marker if required */
 146         if (ha->marker_needed != 0) {
 147                 if (ha_locked) {
 148                         if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
 149                             QLA_SUCCESS)
 150                                 return (QLA_FUNCTION_FAILED);
 151                 } else {
 152                         if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
 153                             QLA_SUCCESS)
 154                                 return (QLA_FUNCTION_FAILED);
 155                 }
 156                 ha->marker_needed = 0;
 157         }
 158         return (QLA_SUCCESS);
 159 }
 160
 161 static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);
 162 static inline uint8_t *
 163 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
 164 {
 165        uint32_t *ifcp = (uint32_t *) fcp;
 166        uint32_t *ofcp = (uint32_t *) fcp;
 167        uint32_t iter = bsize >> 2;
 168
 169        for (; iter ; iter--)
 170                *ofcp++ = swab32(*ifcp++);
 171
 172        return fcp;
 173 }
 174
 175 static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);
 176 static inline int
 177 qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id)
 178 {
 179         if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
 180                 return (loop_id > NPH_LAST_HANDLE);
 181
 182         return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
 183             loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
 184 };