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