drivers/scsi/qla2xxx/qla_inline.h

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7
   8 /*
   9  * qla2x00_debounce_register
  10  *      Debounce register.
  11  *
  12  * Input:
  13  *      port = register address.
  14  *
  15  * Returns:
  16  *      register value.
  17  */
  18 static __inline__ uint16_t
  19 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
  20 {
  21         volatile uint16_t first;
  22         volatile uint16_t second;
  23
  24         do {
  25                 first = RD_REG_WORD(addr);
  26                 barrier();
  27                 cpu_relax();
  28                 second = RD_REG_WORD(addr);
  29         } while (first != second);
  30
  31         return (first);
  32 }
  33
  34 static inline void
  35 qla2x00_poll(scsi_qla_host_t *ha)
  36 {
  37         ha->isp_ops->intr_handler(0, ha);
  38 }
  39
  40 static __inline__ scsi_qla_host_t *
  41 to_qla_parent(scsi_qla_host_t *ha)
  42 {
  43         return ha->parent ? ha->parent : ha;
  44 }
  45
  46 /**
  47  * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
  48  * @ha: HA context
  49  * @ha_locked: is function called with the hardware lock
  50  *
  51  * Returns non-zero if a failure occured, else zero.
  52  */
  53 static inline int
  54 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
  55 {
  56         /* Send marker if required */
  57         if (ha->marker_needed != 0) {
  58                 if (ha_locked) {
  59                         if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
  60                             QLA_SUCCESS)
  61                                 return (QLA_FUNCTION_FAILED);
  62                 } else {
  63                         if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
  64                             QLA_SUCCESS)
  65                                 return (QLA_FUNCTION_FAILED);
  66                 }
  67                 ha->marker_needed = 0;
  68         }
  69         return (QLA_SUCCESS);
  70 }
  71
  72 static inline uint8_t *
  73 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
  74 {
  75        uint32_t *ifcp = (uint32_t *) fcp;
  76        uint32_t *ofcp = (uint32_t *) fcp;
  77        uint32_t iter = bsize >> 2;
  78
  79        for (; iter ; iter--)
  80                *ofcp++ = swab32(*ifcp++);
  81
  82        return fcp;
  83 }
  84
  85 static inline int
  86 qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id)
  87 {
  88         if (IS_FWI2_CAPABLE(ha))
  89                 return (loop_id > NPH_LAST_HANDLE);
  90
  91         return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
  92             loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
  93 };