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  * @vha: HA context
  14  * @dsds: number of data segment decriptors needed
  15  *
  16  * Returns the number of IOCB entries needed to store @dsds.
  17  */
  18 static inline uint16_t
  19 qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
  20 {
  21         uint16_t iocbs;
  22
  23         iocbs = 1;
  24         if (dsds > 1) {
  25                 iocbs += (dsds - 1) / 5;
  26                 if ((dsds - 1) % 5)
  27                         iocbs++;
  28         }
  29         return iocbs;
  30 }
  31
  32 /*
  33  * qla2x00_debounce_register
  34  *      Debounce register.
  35  *
  36  * Input:
  37  *      port = register address.
  38  *
  39  * Returns:
  40  *      register value.
  41  */
  42 static __inline__ uint16_t
  43 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
  44 {
  45         volatile uint16_t first;
  46         volatile uint16_t second;
  47
  48         do {
  49                 first = RD_REG_WORD(addr);
  50                 barrier();
  51                 cpu_relax();
  52                 second = RD_REG_WORD(addr);
  53         } while (first != second);
  54
  55         return (first);
  56 }
  57
  58 static inline void
  59 qla2x00_poll(struct rsp_que *rsp)
  60 {
  61         struct qla_hw_data *ha = rsp->hw;
  62
  63         if (IS_P3P_TYPE(ha))
  64                 qla82xx_poll(0, rsp);
  65         else
  66                 ha->isp_ops->intr_handler(0, rsp);
  67 }
  68
  69 static inline uint8_t *
  70 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
  71 {
  72        uint32_t *ifcp = (uint32_t *) fcp;
  73        uint32_t *ofcp = (uint32_t *) fcp;
  74        uint32_t iter = bsize >> 2;
  75
  76        for (; iter ; iter--)
  77                *ofcp++ = swab32(*ifcp++);
  78
  79        return fcp;
  80 }
  81
  82 static inline void
  83 host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
  84 {
  85         uint32_t *isrc = (uint32_t *) src;
  86         __le32 *odest = (__le32 *) dst;
  87         uint32_t iter = bsize >> 2;
  88
  89         for ( ; iter--; isrc++)
  90                 *odest++ = cpu_to_le32(*isrc);
  91 }
  92
  93 static inline void
  94 qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha)
  95 {
  96         int i;
  97
  98         if (IS_FWI2_CAPABLE(ha))
  99                 return;
 100
 101         for (i = 0; i < SNS_FIRST_LOOP_ID; i++)
 102                 set_bit(i, ha->loop_id_map);
 103         set_bit(MANAGEMENT_SERVER, ha->loop_id_map);
 104         set_bit(BROADCAST, ha->loop_id_map);
 105 }
 106
 107 static inline int
 108 qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
 109 {
 110         struct qla_hw_data *ha = vha->hw;
 111         if (IS_FWI2_CAPABLE(ha))
 112                 return (loop_id > NPH_LAST_HANDLE);
 113
 114         return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
 115             loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
 116 }
 117
 118 static inline void
 119 qla2x00_clear_loop_id(fc_port_t *fcport) {
 120         struct qla_hw_data *ha = fcport->vha->hw;
 121
 122         if (fcport->loop_id == FC_NO_LOOP_ID ||
 123             qla2x00_is_reserved_id(fcport->vha, fcport->loop_id))
 124                 return;
 125
 126         clear_bit(fcport->loop_id, ha->loop_id_map);
 127         fcport->loop_id = FC_NO_LOOP_ID;
 128 }
 129
 130 static inline void
 131 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
 132 {
 133         struct dsd_dma *dsd, *tdsd;
 134
 135         /* clean up allocated prev pool */
 136         list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
 137                 dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
 138                     dsd->dsd_list_dma);
 139                 list_del(&dsd->list);
 140                 kfree(dsd);
 141         }
 142         INIT_LIST_HEAD(&ctx->dsd_list);
 143 }
 144
 145 static inline void
 146 qla2x00_set_fcport_state(fc_port_t *fcport, int state)
 147 {
 148         int old_state;
 149
 150         old_state = atomic_read(&fcport->state);
 151         atomic_set(&fcport->state, state);
 152
 153         /* Don't print state transitions during initial allocation of fcport */
 154         if (old_state && old_state != state) {
 155                 ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
 156                     "FCPort %8phC state transitioned from %s to %s - "
 157                         "portid=%02x%02x%02x.\n", fcport->port_name,
 158                     port_state_str[old_state], port_state_str[state],
 159                     fcport->d_id.b.domain, fcport->d_id.b.area,
 160                     fcport->d_id.b.al_pa);
 161         }
 162 }
 163
 164 static inline int
 165 qla2x00_hba_err_chk_enabled(srb_t *sp)
 166 {
 167         /*
 168          * Uncomment when corresponding SCSI changes are done.
 169          *
 170         if (!sp->cmd->prot_chk)
 171                 return 0;
 172          *
 173          */
 174         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
 175         case SCSI_PROT_READ_STRIP:
 176         case SCSI_PROT_WRITE_INSERT:
 177                 if (ql2xenablehba_err_chk >= 1)
 178                         return 1;
 179                 break;
 180         case SCSI_PROT_READ_PASS:
 181         case SCSI_PROT_WRITE_PASS:
 182                 if (ql2xenablehba_err_chk >= 2)
 183                         return 1;
 184                 break;
 185         case SCSI_PROT_READ_INSERT:
 186         case SCSI_PROT_WRITE_STRIP:
 187                 return 1;
 188         }
 189         return 0;
 190 }
 191
 192 static inline int
 193 qla2x00_reset_active(scsi_qla_host_t *vha)
 194 {
 195         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 196
 197         /* Test appropriate base-vha and vha flags. */
 198         return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
 199             test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
 200             test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
 201             test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
 202             test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 203 }
 204
 205 static inline int
 206 qla2x00_chip_is_down(scsi_qla_host_t *vha)
 207 {
 208         return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
 209 }
 210
 211 static inline srb_t *
 212 qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
 213 {
 214         srb_t *sp = NULL;
 215         uint8_t bail;
 216
 217         QLA_QPAIR_MARK_BUSY(qpair, bail);
 218         if (unlikely(bail))
 219                 return NULL;
 220
 221         sp = mempool_alloc(qpair->srb_mempool, flag);
 222         if (!sp)
 223                 goto done;
 224
 225         memset(sp, 0, sizeof(*sp));
 226         sp->fcport = fcport;
 227         sp->iocbs = 1;
 228         sp->vha = qpair->vha;
 229         INIT_LIST_HEAD(&sp->elem);
 230
 231 done:
 232         if (!sp)
 233                 QLA_QPAIR_MARK_NOT_BUSY(qpair);
 234         return sp;
 235 }
 236
 237 static inline void
 238 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
 239 {
 240         mempool_free(sp, qpair->srb_mempool);
 241         QLA_QPAIR_MARK_NOT_BUSY(qpair);
 242 }
 243
 244 static inline srb_t *
 245 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 246 {
 247         srb_t *sp = NULL;
 248         uint8_t bail;
 249
 250         QLA_VHA_MARK_BUSY(vha, bail);
 251         if (unlikely(bail))
 252                 return NULL;
 253
 254         sp = mempool_alloc(vha->hw->srb_mempool, flag);
 255         if (!sp)
 256                 goto done;
 257
 258         memset(sp, 0, sizeof(*sp));
 259         sp->fcport = fcport;
 260         sp->cmd_type = TYPE_SRB;
 261         sp->iocbs = 1;
 262         sp->vha = vha;
 263 done:
 264         if (!sp)
 265                 QLA_VHA_MARK_NOT_BUSY(vha);
 266         return sp;
 267 }
 268
 269 static inline void
 270 qla2x00_rel_sp(srb_t *sp)
 271 {
 272         QLA_VHA_MARK_NOT_BUSY(sp->vha);
 273         mempool_free(sp, sp->vha->hw->srb_mempool);
 274 }
 275
 276 static inline void
 277 qla2x00_init_timer(srb_t *sp, unsigned long tmo)
 278 {
 279         timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
 280         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
 281         sp->free = qla2x00_sp_free;
 282         init_completion(&sp->comp);
 283         if (IS_QLAFX00(sp->vha->hw) && (sp->type == SRB_FXIOCB_DCMD))
 284                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
 285         add_timer(&sp->u.iocb_cmd.timer);
 286 }
 287
 288 static inline int
 289 qla2x00_gid_list_size(struct qla_hw_data *ha)
 290 {
 291         if (IS_QLAFX00(ha))
 292                 return sizeof(uint32_t) * 32;
 293         else
 294                 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
 295 }
 296
 297 static inline void
 298 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
 299 {
 300         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 301             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 302                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 303                 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 304                 complete(&ha->mbx_intr_comp);
 305         }
 306 }
 307
 308 static inline void
 309 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
 310 {
 311         if (retry_delay)
 312                 fcport->retry_delay_timestamp = jiffies +
 313                     (retry_delay * HZ / 10);
 314 }
 315
 316 static inline bool
 317 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
 318 {
 319         if (qla_ini_mode_enabled(vha) &&
 320             (ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
 321                 return true;
 322         else if (qla_tgt_mode_enabled(vha) &&
 323             (ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
 324                 return true;
 325         else if (qla_dual_mode_enabled(vha) &&
 326             ((ql2xiniexchg + ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
 327                 return true;
 328         else
 329                 return false;
 330 }
 331
 332 static inline void
 333 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
 334 {
 335         qpair->cpuid = cpuid;
 336
 337         if (!list_empty(&qpair->hints_list)) {
 338                 struct qla_qpair_hint *h;
 339
 340                 list_for_each_entry(h, &qpair->hints_list, hint_elem)
 341                         h->cpuid = qpair->cpuid;
 342         }
 343 }
 344
 345 static inline struct qla_qpair_hint *
 346 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
 347 {
 348         struct qla_qpair_hint *h;
 349         u16 i;
 350
 351         for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
 352                 h = &tgt->qphints[i];
 353                 if (h->qpair == qpair)
 354                         return h;
 355         }
 356
 357         return NULL;
 358 }
 359
 360 static inline void
 361 qla_83xx_start_iocbs(struct qla_qpair *qpair)
 362 {
 363         struct req_que *req = qpair->req;
 364
 365         req->ring_index++;
 366         if (req->ring_index == req->length) {
 367                 req->ring_index = 0;
 368                 req->ring_ptr = req->ring;
 369         } else
 370                 req->ring_ptr++;
 371
 372         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 373 }