drivers/scsi/qla2xxx/qla_inline.h

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2014 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7
   8 #include "qla_target.h"
   9 /**
  10  * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
  11  * Continuation Type 1 IOCBs to allocate.
  12  *
  13  * @dsds: number of data segment decriptors needed
  14  *
  15  * Returns the number of IOCB entries needed to store @dsds.
  16  */
  17 static inline uint16_t
  18 qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
  19 {
  20         uint16_t iocbs;
  21
  22         iocbs = 1;
  23         if (dsds > 1) {
  24                 iocbs += (dsds - 1) / 5;
  25                 if ((dsds - 1) % 5)
  26                         iocbs++;
  27         }
  28         return iocbs;
  29 }
  30
  31 /*
  32  * qla2x00_debounce_register
  33  *      Debounce register.
  34  *
  35  * Input:
  36  *      port = register address.
  37  *
  38  * Returns:
  39  *      register value.
  40  */
  41 static __inline__ uint16_t
  42 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
  43 {
  44         volatile uint16_t first;
  45         volatile uint16_t second;
  46
  47         do {
  48                 first = RD_REG_WORD(addr);
  49                 barrier();
  50                 cpu_relax();
  51                 second = RD_REG_WORD(addr);
  52         } while (first != second);
  53
  54         return (first);
  55 }
  56
  57 static inline void
  58 qla2x00_poll(struct rsp_que *rsp)
  59 {
  60         unsigned long flags;
  61         struct qla_hw_data *ha = rsp->hw;
  62         local_irq_save(flags);
  63         if (IS_P3P_TYPE(ha))
  64                 qla82xx_poll(0, rsp);
  65         else
  66                 ha->isp_ops->intr_handler(0, rsp);
  67         local_irq_restore(flags);
  68 }
  69
  70 static inline uint8_t *
  71 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
  72 {
  73        uint32_t *ifcp = (uint32_t *) fcp;
  74        uint32_t *ofcp = (uint32_t *) fcp;
  75        uint32_t iter = bsize >> 2;
  76
  77        for (; iter ; iter--)
  78                *ofcp++ = swab32(*ifcp++);
  79
  80        return fcp;
  81 }
  82
  83 static inline void
  84 host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
  85 {
  86         uint32_t *isrc = (uint32_t *) src;
  87         __le32 *odest = (__le32 *) dst;
  88         uint32_t iter = bsize >> 2;
  89
  90         for (; iter ; iter--)
  91                 *odest++ = cpu_to_le32(*isrc++);
  92 }
  93
  94 static inline void
  95 qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha)
  96 {
  97         int i;
  98
  99         if (IS_FWI2_CAPABLE(ha))
 100                 return;
 101
 102         for (i = 0; i < SNS_FIRST_LOOP_ID; i++)
 103                 set_bit(i, ha->loop_id_map);
 104         set_bit(MANAGEMENT_SERVER, ha->loop_id_map);
 105         set_bit(BROADCAST, ha->loop_id_map);
 106 }
 107
 108 static inline int
 109 qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
 110 {
 111         struct qla_hw_data *ha = vha->hw;
 112         if (IS_FWI2_CAPABLE(ha))
 113                 return (loop_id > NPH_LAST_HANDLE);
 114
 115         return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
 116             loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
 117 }
 118
 119 static inline void
 120 qla2x00_clear_loop_id(fc_port_t *fcport) {
 121         struct qla_hw_data *ha = fcport->vha->hw;
 122
 123         if (fcport->loop_id == FC_NO_LOOP_ID ||
 124             qla2x00_is_reserved_id(fcport->vha, fcport->loop_id))
 125                 return;
 126
 127         clear_bit(fcport->loop_id, ha->loop_id_map);
 128         fcport->loop_id = FC_NO_LOOP_ID;
 129 }
 130
 131 static inline void
 132 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp,
 133         struct qla_tgt_cmd *tc)
 134 {
 135         struct dsd_dma *dsd_ptr, *tdsd_ptr;
 136         struct crc_context *ctx;
 137
 138         if (sp)
 139                 ctx = (struct crc_context *)GET_CMD_CTX_SP(sp);
 140         else if (tc)
 141                 ctx = (struct crc_context *)tc->ctx;
 142         else {
 143                 BUG();
 144                 return;
 145         }
 146
 147         /* clean up allocated prev pool */
 148         list_for_each_entry_safe(dsd_ptr, tdsd_ptr,
 149             &ctx->dsd_list, list) {
 150                 dma_pool_free(ha->dl_dma_pool, dsd_ptr->dsd_addr,
 151                     dsd_ptr->dsd_list_dma);
 152                 list_del(&dsd_ptr->list);
 153                 kfree(dsd_ptr);
 154         }
 155         INIT_LIST_HEAD(&ctx->dsd_list);
 156 }
 157
 158 static inline void
 159 qla2x00_set_fcport_state(fc_port_t *fcport, int state)
 160 {
 161         int old_state;
 162
 163         old_state = atomic_read(&fcport->state);
 164         atomic_set(&fcport->state, state);
 165
 166         /* Don't print state transitions during initial allocation of fcport */
 167         if (old_state && old_state != state) {
 168                 ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
 169                     "FCPort state transitioned from %s to %s - "
 170                     "portid=%02x%02x%02x.\n",
 171                     port_state_str[old_state], port_state_str[state],
 172                     fcport->d_id.b.domain, fcport->d_id.b.area,
 173                     fcport->d_id.b.al_pa);
 174         }
 175 }
 176
 177 static inline int
 178 qla2x00_hba_err_chk_enabled(srb_t *sp)
 179 {
 180         /*
 181          * Uncomment when corresponding SCSI changes are done.
 182          *
 183         if (!sp->cmd->prot_chk)
 184                 return 0;
 185          *
 186          */
 187         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
 188         case SCSI_PROT_READ_STRIP:
 189         case SCSI_PROT_WRITE_INSERT:
 190                 if (ql2xenablehba_err_chk >= 1)
 191                         return 1;
 192                 break;
 193         case SCSI_PROT_READ_PASS:
 194         case SCSI_PROT_WRITE_PASS:
 195                 if (ql2xenablehba_err_chk >= 2)
 196                         return 1;
 197                 break;
 198         case SCSI_PROT_READ_INSERT:
 199         case SCSI_PROT_WRITE_STRIP:
 200                 return 1;
 201         }
 202         return 0;
 203 }
 204
 205 static inline int
 206 qla2x00_reset_active(scsi_qla_host_t *vha)
 207 {
 208         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 209
 210         /* Test appropriate base-vha and vha flags. */
 211         return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
 212             test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
 213             test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
 214             test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
 215             test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 216 }
 217
 218 static inline srb_t *
 219 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 220 {
 221         srb_t *sp = NULL;
 222         struct qla_hw_data *ha = vha->hw;
 223         uint8_t bail;
 224
 225         QLA_VHA_MARK_BUSY(vha, bail);
 226         if (unlikely(bail))
 227                 return NULL;
 228
 229         sp = mempool_alloc(ha->srb_mempool, flag);
 230         if (!sp)
 231                 goto done;
 232
 233         memset(sp, 0, sizeof(*sp));
 234         sp->fcport = fcport;
 235         sp->iocbs = 1;
 236 done:
 237         if (!sp)
 238                 QLA_VHA_MARK_NOT_BUSY(vha);
 239         return sp;
 240 }
 241
 242 static inline void
 243 qla2x00_rel_sp(scsi_qla_host_t *vha, srb_t *sp)
 244 {
 245         mempool_free(sp, vha->hw->srb_mempool);
 246         QLA_VHA_MARK_NOT_BUSY(vha);
 247 }
 248
 249 static inline void
 250 qla2x00_init_timer(srb_t *sp, unsigned long tmo)
 251 {
 252         init_timer(&sp->u.iocb_cmd.timer);
 253         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
 254         sp->u.iocb_cmd.timer.data = (unsigned long)sp;
 255         sp->u.iocb_cmd.timer.function = qla2x00_sp_timeout;
 256         add_timer(&sp->u.iocb_cmd.timer);
 257         sp->free = qla2x00_sp_free;
 258         if ((IS_QLAFX00(sp->fcport->vha->hw)) &&
 259             (sp->type == SRB_FXIOCB_DCMD))
 260                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
 261 }
 262
 263 static inline int
 264 qla2x00_gid_list_size(struct qla_hw_data *ha)
 265 {
 266         if (IS_QLAFX00(ha))
 267                 return sizeof(uint32_t) * 32;
 268         else
 269                 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
 270 }
 271
 272 static inline void
 273 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
 274 {
 275         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 276             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 277                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 278                 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 279                 complete(&ha->mbx_intr_comp);
 280         }
 281 }
 282
 283 static inline void
 284 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
 285 {
 286         if (retry_delay)
 287                 fcport->retry_delay_timestamp = jiffies +
 288                     (retry_delay * HZ / 10);
 289 }