1 /* 2 * QLogic Fibre Channel HBA Driver 3 * Copyright (c) 2003-2011 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(struct rsp_que *rsp) 36 { 37 unsigned long flags; 38 struct qla_hw_data *ha = rsp->hw; 39 local_irq_save(flags); 40 if (IS_QLA82XX(ha)) 41 qla82xx_poll(0, rsp); 42 else 43 ha->isp_ops->intr_handler(0, rsp); 44 local_irq_restore(flags); 45 } 46 47 static inline uint8_t * 48 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize) 49 { 50 uint32_t *ifcp = (uint32_t *) fcp; 51 uint32_t *ofcp = (uint32_t *) fcp; 52 uint32_t iter = bsize >> 2; 53 54 for (; iter ; iter--) 55 *ofcp++ = swab32(*ifcp++); 56 57 return fcp; 58 } 59 60 static inline int 61 qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id) 62 { 63 struct qla_hw_data *ha = vha->hw; 64 if (IS_FWI2_CAPABLE(ha)) 65 return (loop_id > NPH_LAST_HANDLE); 66 67 return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) || 68 loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST); 69 } 70 71 static inline void 72 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp) 73 { 74 struct dsd_dma *dsd_ptr, *tdsd_ptr; 75 struct crc_context *ctx; 76 77 ctx = (struct crc_context *)GET_CMD_CTX_SP(sp); 78 79 /* clean up allocated prev pool */ 80 list_for_each_entry_safe(dsd_ptr, tdsd_ptr, 81 &ctx->dsd_list, list) { 82 dma_pool_free(ha->dl_dma_pool, dsd_ptr->dsd_addr, 83 dsd_ptr->dsd_list_dma); 84 list_del(&dsd_ptr->list); 85 kfree(dsd_ptr); 86 } 87 INIT_LIST_HEAD(&ctx->dsd_list); 88 } 89 90 static inline void 91 qla2x00_set_fcport_state(fc_port_t *fcport, int state) 92 { 93 int old_state; 94 95 old_state = atomic_read(&fcport->state); 96 atomic_set(&fcport->state, state); 97 98 /* Don't print state transitions during initial allocation of fcport */ 99 if (old_state && old_state != state) { 100 ql_dbg(ql_dbg_disc, fcport->vha, 0x207d, 101 "FCPort state transitioned from %s to %s - " 102 "portid=%02x%02x%02x.\n", 103 port_state_str[old_state], port_state_str[state], 104 fcport->d_id.b.domain, fcport->d_id.b.area, 105 fcport->d_id.b.al_pa); 106 } 107 } 108 109 static inline int 110 qla2x00_hba_err_chk_enabled(srb_t *sp) 111 { 112 /* 113 * Uncomment when corresponding SCSI changes are done. 114 * 115 if (!sp->cmd->prot_chk) 116 return 0; 117 * 118 */ 119 switch (scsi_get_prot_op(GET_CMD_SP(sp))) { 120 case SCSI_PROT_READ_STRIP: 121 case SCSI_PROT_WRITE_INSERT: 122 if (ql2xenablehba_err_chk >= 1) 123 return 1; 124 break; 125 case SCSI_PROT_READ_PASS: 126 case SCSI_PROT_WRITE_PASS: 127 if (ql2xenablehba_err_chk >= 2) 128 return 1; 129 break; 130 case SCSI_PROT_READ_INSERT: 131 case SCSI_PROT_WRITE_STRIP: 132 return 1; 133 } 134 return 0; 135 } 136 137 static inline int 138 qla2x00_reset_active(scsi_qla_host_t *vha) 139 { 140 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); 141 142 /* Test appropriate base-vha and vha flags. */ 143 return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) || 144 test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) || 145 test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) || 146 test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || 147 test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags); 148 } 149 150 static inline srb_t * 151 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag) 152 { 153 srb_t *sp = NULL; 154 struct qla_hw_data *ha = vha->hw; 155 uint8_t bail; 156 157 QLA_VHA_MARK_BUSY(vha, bail); 158 if (unlikely(bail)) 159 return NULL; 160 161 sp = mempool_alloc(ha->srb_mempool, flag); 162 if (!sp) 163 goto done; 164 165 memset(sp, 0, sizeof(*sp)); 166 sp->fcport = fcport; 167 sp->iocbs = 1; 168 done: 169 if (!sp) 170 QLA_VHA_MARK_NOT_BUSY(vha); 171 return sp; 172 } 173 174 static inline void 175 qla2x00_init_timer(srb_t *sp, unsigned long tmo) 176 { 177 init_timer(&sp->u.iocb_cmd.timer); 178 sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ; 179 sp->u.iocb_cmd.timer.data = (unsigned long)sp; 180 sp->u.iocb_cmd.timer.function = qla2x00_sp_timeout; 181 add_timer(&sp->u.iocb_cmd.timer); 182 sp->free = qla2x00_sp_free; 183 } 184 185 static inline int 186 qla2x00_gid_list_size(struct qla_hw_data *ha) 187 { 188 return sizeof(struct gid_list_info) * ha->max_fibre_devices; 189 } 190