drivers/scsi/qla2xxx/qla_inline.h

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7
   8 static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *);
   9 /*
  10  * qla2x00_debounce_register
  11  *      Debounce register.
  12  *
  13  * Input:
  14  *      port = register address.
  15  *
  16  * Returns:
  17  *      register value.
  18  */
  19 static __inline__ uint16_t
  20 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
  21 {
  22         volatile uint16_t first;
  23         volatile uint16_t second;
  24
  25         do {
  26                 first = RD_REG_WORD(addr);
  27                 barrier();
  28                 cpu_relax();
  29                 second = RD_REG_WORD(addr);
  30         } while (first != second);
  31
  32         return (first);
  33 }
  34
  35 static __inline__ int qla2x00_normalize_dma_addr(
  36     dma_addr_t *e_addr,  uint32_t *e_len,
  37     dma_addr_t *ne_addr, uint32_t *ne_len);
  38
  39 /**
  40  * qla2x00_normalize_dma_addr() - Normalize an DMA address.
  41  * @e_addr: Raw DMA address
  42  * @e_len: Raw DMA length
  43  * @ne_addr: Normalized second DMA address
  44  * @ne_len: Normalized second DMA length
  45  *
  46  * If the address does not span a 4GB page boundary, the contents of @ne_addr
  47  * and @ne_len are undefined.  @e_len is updated to reflect a normalization.
  48  *
  49  * Example:
  50  *
  51  *      ffffabc0ffffeeee        (e_addr) start of DMA address
  52  *      0000000020000000        (e_len)  length of DMA transfer
  53  *      ffffabc11fffeeed        end of DMA transfer
  54  *
  55  * Is the 4GB boundary crossed?
  56  *
  57  *      ffffabc0ffffeeee        (e_addr)
  58  *      ffffabc11fffeeed        (e_addr + e_len - 1)
  59  *      00000001e0000003        ((e_addr ^ (e_addr + e_len - 1))
  60  *      0000000100000000        ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff)
  61  *
  62  * Compute start of second DMA segment:
  63  *
  64  *      ffffabc0ffffeeee        (e_addr)
  65  *      ffffabc1ffffeeee        (0x100000000 + e_addr)
  66  *      ffffabc100000000        (0x100000000 + e_addr) & ~(0xffffffff)
  67  *      ffffabc100000000        (ne_addr)
  68  *
  69  * Compute length of second DMA segment:
  70  *
  71  *      00000000ffffeeee        (e_addr & 0xffffffff)
  72  *      0000000000001112        (0x100000000 - (e_addr & 0xffffffff))
  73  *      000000001fffeeee        (e_len - (0x100000000 - (e_addr & 0xffffffff))
  74  *      000000001fffeeee        (ne_len)
  75  *
  76  * Adjust length of first DMA segment
  77  *
  78  *      0000000020000000        (e_len)
  79  *      0000000000001112        (e_len - ne_len)
  80  *      0000000000001112        (e_len)
  81  *
  82  * Returns non-zero if the specified address was normalized, else zero.
  83  */
  84 static __inline__ int
  85 qla2x00_normalize_dma_addr(
  86     dma_addr_t *e_addr,  uint32_t *e_len,
  87     dma_addr_t *ne_addr, uint32_t *ne_len)
  88 {
  89         int normalized;
  90
  91         normalized = 0;
  92         if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) {
  93                 /* Compute normalized crossed address and len */
  94                 *ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL);
  95                 *ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL));
  96                 *e_len -= *ne_len;
  97
  98                 normalized++;
  99         }
 100         return (normalized);
 101 }
 102
 103 static __inline__ void qla2x00_poll(scsi_qla_host_t *);
 104 static inline void
 105 qla2x00_poll(scsi_qla_host_t *ha)
 106 {
 107         ha->isp_ops->intr_handler(0, ha);
 108 }
 109
 110 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
 111 /*
 112  * This routine will wait for fabric devices for
 113  * the reset delay.
 114  */
 115 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
 116 {
 117         uint16_t        fw_state;
 118
 119         qla2x00_get_firmware_state(ha, &fw_state);
 120 }
 121
 122 static __inline__ scsi_qla_host_t * to_qla_parent(scsi_qla_host_t *);
 123 static __inline__ scsi_qla_host_t *
 124 to_qla_parent(scsi_qla_host_t *ha)
 125 {
 126         return ha->parent ? ha->parent : ha;
 127 }
 128
 129 /**
 130  * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
 131  * @ha: HA context
 132  * @ha_locked: is function called with the hardware lock
 133  *
 134  * Returns non-zero if a failure occured, else zero.
 135  */
 136 static inline int
 137 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
 138 {
 139         /* Send marker if required */
 140         if (ha->marker_needed != 0) {
 141                 if (ha_locked) {
 142                         if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
 143                             QLA_SUCCESS)
 144                                 return (QLA_FUNCTION_FAILED);
 145                 } else {
 146                         if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
 147                             QLA_SUCCESS)
 148                                 return (QLA_FUNCTION_FAILED);
 149                 }
 150                 ha->marker_needed = 0;
 151         }
 152         return (QLA_SUCCESS);
 153 }
 154
 155 static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);
 156 static inline uint8_t *
 157 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
 158 {
 159        uint32_t *ifcp = (uint32_t *) fcp;
 160        uint32_t *ofcp = (uint32_t *) fcp;
 161        uint32_t iter = bsize >> 2;
 162
 163        for (; iter ; iter--)
 164                *ofcp++ = swab32(*ifcp++);
 165
 166        return fcp;
 167 }
 168
 169 static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);
 170 static inline int
 171 qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id)
 172 {
 173         if (IS_FWI2_CAPABLE(ha))
 174                 return (loop_id > NPH_LAST_HANDLE);
 175
 176         return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
 177             loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
 178 };