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--; isrc++)
  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, struct crc_context *ctx)
 133 {
 134         struct dsd_dma *dsd, *tdsd;
 135
 136         /* clean up allocated prev pool */
 137         list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
 138                 dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
 139                     dsd->dsd_list_dma);
 140                 list_del(&dsd->list);
 141                 kfree(dsd);
 142         }
 143         INIT_LIST_HEAD(&ctx->dsd_list);
 144 }
 145
 146 static inline void
 147 qla2x00_set_fcport_state(fc_port_t *fcport, int state)
 148 {
 149         int old_state;
 150
 151         old_state = atomic_read(&fcport->state);
 152         atomic_set(&fcport->state, state);
 153
 154         /* Don't print state transitions during initial allocation of fcport */
 155         if (old_state && old_state != state) {
 156                 ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
 157                     "FCPort %8phC state transitioned from %s to %s - "
 158                         "portid=%02x%02x%02x.\n", fcport->port_name,
 159                     port_state_str[old_state], port_state_str[state],
 160                     fcport->d_id.b.domain, fcport->d_id.b.area,
 161                     fcport->d_id.b.al_pa);
 162         }
 163 }
 164
 165 static inline int
 166 qla2x00_hba_err_chk_enabled(srb_t *sp)
 167 {
 168         /*
 169          * Uncomment when corresponding SCSI changes are done.
 170          *
 171         if (!sp->cmd->prot_chk)
 172                 return 0;
 173          *
 174          */
 175         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
 176         case SCSI_PROT_READ_STRIP:
 177         case SCSI_PROT_WRITE_INSERT:
 178                 if (ql2xenablehba_err_chk >= 1)
 179                         return 1;
 180                 break;
 181         case SCSI_PROT_READ_PASS:
 182         case SCSI_PROT_WRITE_PASS:
 183                 if (ql2xenablehba_err_chk >= 2)
 184                         return 1;
 185                 break;
 186         case SCSI_PROT_READ_INSERT:
 187         case SCSI_PROT_WRITE_STRIP:
 188                 return 1;
 189         }
 190         return 0;
 191 }
 192
 193 static inline int
 194 qla2x00_reset_active(scsi_qla_host_t *vha)
 195 {
 196         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 197
 198         /* Test appropriate base-vha and vha flags. */
 199         return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
 200             test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
 201             test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
 202             test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
 203             test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 204 }
 205
 206 static inline srb_t *
 207 qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
 208 {
 209         srb_t *sp = NULL;
 210         uint8_t bail;
 211
 212         QLA_QPAIR_MARK_BUSY(qpair, bail);
 213         if (unlikely(bail))
 214                 return NULL;
 215
 216         sp = mempool_alloc(qpair->srb_mempool, flag);
 217         if (!sp)
 218                 goto done;
 219
 220         memset(sp, 0, sizeof(*sp));
 221         sp->fcport = fcport;
 222         sp->iocbs = 1;
 223         sp->vha = qpair->vha;
 224 done:
 225         if (!sp)
 226                 QLA_QPAIR_MARK_NOT_BUSY(qpair);
 227         return sp;
 228 }
 229
 230 static inline void
 231 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
 232 {
 233         mempool_free(sp, qpair->srb_mempool);
 234         QLA_QPAIR_MARK_NOT_BUSY(qpair);
 235 }
 236
 237 static inline srb_t *
 238 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 239 {
 240         srb_t *sp = NULL;
 241         uint8_t bail;
 242
 243         QLA_VHA_MARK_BUSY(vha, bail);
 244         if (unlikely(bail))
 245                 return NULL;
 246
 247         sp = mempool_alloc(vha->hw->srb_mempool, flag);
 248         if (!sp)
 249                 goto done;
 250
 251         memset(sp, 0, sizeof(*sp));
 252         sp->fcport = fcport;
 253         sp->cmd_type = TYPE_SRB;
 254         sp->iocbs = 1;
 255         sp->vha = vha;
 256 done:
 257         if (!sp)
 258                 QLA_VHA_MARK_NOT_BUSY(vha);
 259         return sp;
 260 }
 261
 262 static inline void
 263 qla2x00_rel_sp(srb_t *sp)
 264 {
 265         QLA_VHA_MARK_NOT_BUSY(sp->vha);
 266         mempool_free(sp, sp->vha->hw->srb_mempool);
 267 }
 268
 269 static inline void
 270 qla2x00_init_timer(srb_t *sp, unsigned long tmo)
 271 {
 272         timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
 273         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
 274         add_timer(&sp->u.iocb_cmd.timer);
 275         sp->free = qla2x00_sp_free;
 276         init_completion(&sp->comp);
 277         if (IS_QLAFX00(sp->vha->hw) && (sp->type == SRB_FXIOCB_DCMD))
 278                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
 279         if (sp->type == SRB_ELS_DCMD)
 280                 init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
 281 }
 282
 283 static inline int
 284 qla2x00_gid_list_size(struct qla_hw_data *ha)
 285 {
 286         if (IS_QLAFX00(ha))
 287                 return sizeof(uint32_t) * 32;
 288         else
 289                 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
 290 }
 291
 292 static inline void
 293 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
 294 {
 295         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 296             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 297                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 298                 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 299                 complete(&ha->mbx_intr_comp);
 300         }
 301 }
 302
 303 static inline void
 304 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
 305 {
 306         if (retry_delay)
 307                 fcport->retry_delay_timestamp = jiffies +
 308                     (retry_delay * HZ / 10);
 309 }
 310
 311 static inline bool
 312 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
 313 {
 314         if (qla_ini_mode_enabled(vha) &&
 315             (ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
 316                 return true;
 317         else if (qla_tgt_mode_enabled(vha) &&
 318             (ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
 319                 return true;
 320         else if (qla_dual_mode_enabled(vha) &&
 321             ((ql2xiniexchg + ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
 322                 return true;
 323         else
 324                 return false;
 325 }
 326
 327 static inline void
 328 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
 329 {
 330         qpair->cpuid = cpuid;
 331
 332         if (!list_empty(&qpair->hints_list)) {
 333                 struct qla_qpair_hint *h;
 334
 335                 list_for_each_entry(h, &qpair->hints_list, hint_elem)
 336                         h->cpuid = qpair->cpuid;
 337         }
 338 }
 339
 340 static inline struct qla_qpair_hint *
 341 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
 342 {
 343         struct qla_qpair_hint *h;
 344         u16 i;
 345
 346         for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
 347                 h = &tgt->qphints[i];
 348                 if (h->qpair == qpair)
 349                         return h;
 350         }
 351
 352         return NULL;
 353 }
 354
 355 static inline void
 356 qla_83xx_start_iocbs(struct qla_qpair *qpair)
 357 {
 358         struct req_que *req = qpair->req;
 359
 360         req->ring_index++;
 361         if (req->ring_index == req->length) {
 362                 req->ring_index = 0;
 363                 req->ring_ptr = req->ring;
 364         } else
 365                 req->ring_ptr++;
 366
 367         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 368 }