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(scsi_qla_host_t *vha, struct qla_qpair *qpair,
 213     fc_port_t *fcport, gfp_t flag)
 214 {
 215         srb_t *sp = NULL;
 216         uint8_t bail;
 217
 218         QLA_QPAIR_MARK_BUSY(qpair, bail);
 219         if (unlikely(bail))
 220                 return NULL;
 221
 222         sp = mempool_alloc(qpair->srb_mempool, flag);
 223         if (!sp)
 224                 goto done;
 225
 226         memset(sp, 0, sizeof(*sp));
 227         sp->fcport = fcport;
 228         sp->iocbs = 1;
 229         sp->vha = vha;
 230         sp->qpair = qpair;
 231         sp->cmd_type = TYPE_SRB;
 232         INIT_LIST_HEAD(&sp->elem);
 233
 234 done:
 235         if (!sp)
 236                 QLA_QPAIR_MARK_NOT_BUSY(qpair);
 237         return sp;
 238 }
 239
 240 static inline void
 241 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
 242 {
 243         mempool_free(sp, qpair->srb_mempool);
 244         QLA_QPAIR_MARK_NOT_BUSY(qpair);
 245 }
 246
 247 static inline srb_t *
 248 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 249 {
 250         srb_t *sp = NULL;
 251         uint8_t bail;
 252         struct qla_qpair *qpair;
 253
 254         QLA_VHA_MARK_BUSY(vha, bail);
 255         if (unlikely(bail))
 256                 return NULL;
 257
 258         qpair = vha->hw->base_qpair;
 259         sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
 260         if (!sp)
 261                 goto done;
 262
 263         sp->vha = vha;
 264 done:
 265         if (!sp)
 266                 QLA_VHA_MARK_NOT_BUSY(vha);
 267         return sp;
 268 }
 269
 270 static inline void
 271 qla2x00_rel_sp(srb_t *sp)
 272 {
 273         QLA_VHA_MARK_NOT_BUSY(sp->vha);
 274         qla2xxx_rel_qpair_sp(sp->qpair, sp);
 275 }
 276
 277 static inline void
 278 qla2x00_init_timer(srb_t *sp, unsigned long tmo)
 279 {
 280         timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
 281         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
 282         sp->free = qla2x00_sp_free;
 283         init_completion(&sp->comp);
 284         if (IS_QLAFX00(sp->vha->hw) && (sp->type == SRB_FXIOCB_DCMD))
 285                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
 286         add_timer(&sp->u.iocb_cmd.timer);
 287 }
 288
 289 static inline int
 290 qla2x00_gid_list_size(struct qla_hw_data *ha)
 291 {
 292         if (IS_QLAFX00(ha))
 293                 return sizeof(uint32_t) * 32;
 294         else
 295                 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
 296 }
 297
 298 static inline void
 299 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
 300 {
 301         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 302             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 303                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 304                 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 305                 complete(&ha->mbx_intr_comp);
 306         }
 307 }
 308
 309 static inline void
 310 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
 311 {
 312         if (retry_delay)
 313                 fcport->retry_delay_timestamp = jiffies +
 314                     (retry_delay * HZ / 10);
 315 }
 316
 317 static inline bool
 318 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
 319 {
 320         if (qla_ini_mode_enabled(vha) &&
 321             (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
 322                 return true;
 323         else if (qla_tgt_mode_enabled(vha) &&
 324             (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
 325                 return true;
 326         else if (qla_dual_mode_enabled(vha) &&
 327             ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
 328                 return true;
 329         else
 330                 return false;
 331 }
 332
 333 static inline void
 334 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
 335 {
 336         qpair->cpuid = cpuid;
 337
 338         if (!list_empty(&qpair->hints_list)) {
 339                 struct qla_qpair_hint *h;
 340
 341                 list_for_each_entry(h, &qpair->hints_list, hint_elem)
 342                         h->cpuid = qpair->cpuid;
 343         }
 344 }
 345
 346 static inline struct qla_qpair_hint *
 347 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
 348 {
 349         struct qla_qpair_hint *h;
 350         u16 i;
 351
 352         for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
 353                 h = &tgt->qphints[i];
 354                 if (h->qpair == qpair)
 355                         return h;
 356         }
 357
 358         return NULL;
 359 }
 360
 361 static inline void
 362 qla_83xx_start_iocbs(struct qla_qpair *qpair)
 363 {
 364         struct req_que *req = qpair->req;
 365
 366         req->ring_index++;
 367         if (req->ring_index == req->length) {
 368                 req->ring_index = 0;
 369                 req->ring_ptr = req->ring;
 370         } else
 371                 req->ring_ptr++;
 372
 373         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 374 }