drivers/scsi/qla2xxx/qla_inline.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * QLogic Fibre Channel HBA Driver
   4  * Copyright (c)  2003-2014 QLogic Corporation
   5  */
   6
   7 #include "qla_target.h"
   8 /**
   9  * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
  10  * Continuation Type 1 IOCBs to allocate.
  11  *
  12  * @vha: HA context
  13  * @dsds: number of data segment descriptors 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 __le16 __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         struct qla_hw_data *ha = rsp->hw;
  61
  62         if (IS_P3P_TYPE(ha))
  63                 qla82xx_poll(0, rsp);
  64         else
  65                 ha->isp_ops->intr_handler(0, rsp);
  66 }
  67
  68 static inline uint8_t *
  69 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
  70 {
  71        uint32_t *ifcp = (uint32_t *) fcp;
  72        uint32_t *ofcp = (uint32_t *) fcp;
  73        uint32_t iter = bsize >> 2;
  74
  75        for (; iter ; iter--)
  76                *ofcp++ = swab32(*ifcp++);
  77
  78        return fcp;
  79 }
  80
  81 static inline void
  82 host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
  83 {
  84         uint32_t *isrc = (uint32_t *) src;
  85         __le32 *odest = (__le32 *) dst;
  86         uint32_t iter = bsize >> 2;
  87
  88         for ( ; iter--; isrc++)
  89                 *odest++ = cpu_to_le32(*isrc);
  90 }
  91
  92 static inline void
  93 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
  94 {
  95         struct dsd_dma *dsd, *tdsd;
  96
  97         /* clean up allocated prev pool */
  98         list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
  99                 dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
 100                     dsd->dsd_list_dma);
 101                 list_del(&dsd->list);
 102                 kfree(dsd);
 103         }
 104         INIT_LIST_HEAD(&ctx->dsd_list);
 105 }
 106
 107 static inline void
 108 qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state)
 109 {
 110         int old_val;
 111         uint8_t shiftbits, mask;
 112
 113         /* This will have to change when the max no. of states > 16 */
 114         shiftbits = 4;
 115         mask = (1 << shiftbits) - 1;
 116
 117         fcport->disc_state = state;
 118         while (1) {
 119                 old_val = atomic_read(&fcport->shadow_disc_state);
 120                 if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state,
 121                     old_val, (old_val << shiftbits) | state)) {
 122                         ql_dbg(ql_dbg_disc, fcport->vha, 0x2134,
 123                             "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n",
 124                             fcport->port_name, port_dstate_str[old_val & mask],
 125                             port_dstate_str[state], fcport->d_id.b24);
 126                         return;
 127                 }
 128         }
 129 }
 130
 131 static inline int
 132 qla2x00_hba_err_chk_enabled(srb_t *sp)
 133 {
 134         /*
 135          * Uncomment when corresponding SCSI changes are done.
 136          *
 137         if (!sp->cmd->prot_chk)
 138                 return 0;
 139          *
 140          */
 141         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
 142         case SCSI_PROT_READ_STRIP:
 143         case SCSI_PROT_WRITE_INSERT:
 144                 if (ql2xenablehba_err_chk >= 1)
 145                         return 1;
 146                 break;
 147         case SCSI_PROT_READ_PASS:
 148         case SCSI_PROT_WRITE_PASS:
 149                 if (ql2xenablehba_err_chk >= 2)
 150                         return 1;
 151                 break;
 152         case SCSI_PROT_READ_INSERT:
 153         case SCSI_PROT_WRITE_STRIP:
 154                 return 1;
 155         }
 156         return 0;
 157 }
 158
 159 static inline int
 160 qla2x00_reset_active(scsi_qla_host_t *vha)
 161 {
 162         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 163
 164         /* Test appropriate base-vha and vha flags. */
 165         return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
 166             test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
 167             test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
 168             test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
 169             test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 170 }
 171
 172 static inline int
 173 qla2x00_chip_is_down(scsi_qla_host_t *vha)
 174 {
 175         return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
 176 }
 177
 178 static void qla2xxx_init_sp(srb_t *sp, scsi_qla_host_t *vha,
 179                             struct qla_qpair *qpair, fc_port_t *fcport)
 180 {
 181         memset(sp, 0, sizeof(*sp));
 182         sp->fcport = fcport;
 183         sp->iocbs = 1;
 184         sp->vha = vha;
 185         sp->qpair = qpair;
 186         sp->cmd_type = TYPE_SRB;
 187         INIT_LIST_HEAD(&sp->elem);
 188 }
 189
 190 static inline srb_t *
 191 qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
 192     fc_port_t *fcport, gfp_t flag)
 193 {
 194         srb_t *sp = NULL;
 195         uint8_t bail;
 196
 197         QLA_QPAIR_MARK_BUSY(qpair, bail);
 198         if (unlikely(bail))
 199                 return NULL;
 200
 201         sp = mempool_alloc(qpair->srb_mempool, flag);
 202         if (sp)
 203                 qla2xxx_init_sp(sp, vha, qpair, fcport);
 204         else
 205                 QLA_QPAIR_MARK_NOT_BUSY(qpair);
 206         return sp;
 207 }
 208
 209 void qla2xxx_rel_done_warning(srb_t *sp, int res);
 210 void qla2xxx_rel_free_warning(srb_t *sp);
 211
 212 static inline void
 213 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
 214 {
 215         sp->qpair = NULL;
 216         sp->done = qla2xxx_rel_done_warning;
 217         sp->free = qla2xxx_rel_free_warning;
 218         mempool_free(sp, qpair->srb_mempool);
 219         QLA_QPAIR_MARK_NOT_BUSY(qpair);
 220 }
 221
 222 static inline srb_t *
 223 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 224 {
 225         srb_t *sp = NULL;
 226         uint8_t bail;
 227         struct qla_qpair *qpair;
 228
 229         QLA_VHA_MARK_BUSY(vha, bail);
 230         if (unlikely(bail))
 231                 return NULL;
 232
 233         qpair = vha->hw->base_qpair;
 234         sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
 235         if (!sp)
 236                 goto done;
 237
 238         sp->vha = vha;
 239 done:
 240         if (!sp)
 241                 QLA_VHA_MARK_NOT_BUSY(vha);
 242         return sp;
 243 }
 244
 245 static inline void
 246 qla2x00_rel_sp(srb_t *sp)
 247 {
 248         QLA_VHA_MARK_NOT_BUSY(sp->vha);
 249         qla2xxx_rel_qpair_sp(sp->qpair, sp);
 250 }
 251
 252 static inline int
 253 qla2x00_gid_list_size(struct qla_hw_data *ha)
 254 {
 255         if (IS_QLAFX00(ha))
 256                 return sizeof(uint32_t) * 32;
 257         else
 258                 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
 259 }
 260
 261 static inline void
 262 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
 263 {
 264         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 265             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 266                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 267                 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 268                 complete(&ha->mbx_intr_comp);
 269         }
 270 }
 271
 272 static inline void
 273 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t sts_qual)
 274 {
 275         u8 scope;
 276         u16 qual;
 277 #define SQ_SCOPE_MASK           0xc000 /* SAM-6 rev5 5.3.2 */
 278 #define SQ_SCOPE_SHIFT          14
 279 #define SQ_QUAL_MASK            0x3fff
 280
 281 #define SQ_MAX_WAIT_SEC         60 /* Max I/O hold off time in seconds. */
 282 #define SQ_MAX_WAIT_TIME        (SQ_MAX_WAIT_SEC * 10) /* in 100ms. */
 283
 284         if (!sts_qual) /* Common case. */
 285                 return;
 286
 287         scope = (sts_qual & SQ_SCOPE_MASK) >> SQ_SCOPE_SHIFT;
 288         /* Handle only scope 1 or 2, which is for I-T nexus. */
 289         if (scope != 1 && scope != 2)
 290                 return;
 291
 292         /* Skip processing, if retry delay timer is already in effect. */
 293         if (fcport->retry_delay_timestamp &&
 294             time_before(jiffies, fcport->retry_delay_timestamp))
 295                 return;
 296
 297         qual = sts_qual & SQ_QUAL_MASK;
 298         if (qual < 1 || qual > 0x3fef)
 299                 return;
 300         qual = min(qual, (u16)SQ_MAX_WAIT_TIME);
 301
 302         /* qual is expressed in 100ms increments. */
 303         fcport->retry_delay_timestamp = jiffies + (qual * HZ / 10);
 304
 305         ql_log(ql_log_warn, fcport->vha, 0x5101,
 306                "%8phC: I/O throttling requested (status qualifier = %04xh), holding off I/Os for %ums.\n",
 307                fcport->port_name, sts_qual, qual * 100);
 308 }
 309
 310 static inline bool
 311 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
 312 {
 313         if (qla_ini_mode_enabled(vha) &&
 314             (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
 315                 return true;
 316         else if (qla_tgt_mode_enabled(vha) &&
 317             (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
 318                 return true;
 319         else if (qla_dual_mode_enabled(vha) &&
 320             ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
 321                 return true;
 322         else
 323                 return false;
 324 }
 325
 326 static inline void
 327 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
 328 {
 329         qpair->cpuid = cpuid;
 330
 331         if (!list_empty(&qpair->hints_list)) {
 332                 struct qla_qpair_hint *h;
 333
 334                 list_for_each_entry(h, &qpair->hints_list, hint_elem)
 335                         h->cpuid = qpair->cpuid;
 336         }
 337 }
 338
 339 static inline struct qla_qpair_hint *
 340 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
 341 {
 342         struct qla_qpair_hint *h;
 343         u16 i;
 344
 345         for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
 346                 h = &tgt->qphints[i];
 347                 if (h->qpair == qpair)
 348                         return h;
 349         }
 350
 351         return NULL;
 352 }
 353
 354 static inline void
 355 qla_83xx_start_iocbs(struct qla_qpair *qpair)
 356 {
 357         struct req_que *req = qpair->req;
 358
 359         req->ring_index++;
 360         if (req->ring_index == req->length) {
 361                 req->ring_index = 0;
 362                 req->ring_ptr = req->ring;
 363         } else
 364                 req->ring_ptr++;
 365
 366         wrt_reg_dword(req->req_q_in, req->ring_index);
 367 }
 368
 369 static inline int
 370 qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
 371 {
 372         uint32_t data;
 373
 374         data =
 375             ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
 376
 377
 378         return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
 379 }
 380
 381 enum {
 382         RESOURCE_NONE,
 383         RESOURCE_INI,
 384 };
 385
 386 static inline int
 387 qla_get_iocbs(struct qla_qpair *qp, struct iocb_resource *iores)
 388 {
 389         u16 iocbs_used, i;
 390         struct qla_hw_data *ha = qp->vha->hw;
 391
 392         if (!ql2xenforce_iocb_limit) {
 393                 iores->res_type = RESOURCE_NONE;
 394                 return 0;
 395         }
 396
 397         if ((iores->iocb_cnt + qp->fwres.iocbs_used) < qp->fwres.iocbs_qp_limit) {
 398                 qp->fwres.iocbs_used += iores->iocb_cnt;
 399                 return 0;
 400         } else {
 401                 /* no need to acquire qpair lock. It's just rough calculation */
 402                 iocbs_used = ha->base_qpair->fwres.iocbs_used;
 403                 for (i = 0; i < ha->max_qpairs; i++) {
 404                         if (ha->queue_pair_map[i])
 405                                 iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
 406                 }
 407
 408                 if ((iores->iocb_cnt + iocbs_used) < qp->fwres.iocbs_limit) {
 409                         qp->fwres.iocbs_used += iores->iocb_cnt;
 410                         return 0;
 411                 } else {
 412                         iores->res_type = RESOURCE_NONE;
 413                         return -ENOSPC;
 414                 }
 415         }
 416 }
 417
 418 static inline void
 419 qla_put_iocbs(struct qla_qpair *qp, struct iocb_resource *iores)
 420 {
 421         switch (iores->res_type) {
 422         case RESOURCE_NONE:
 423                 break;
 424         default:
 425                 if (qp->fwres.iocbs_used >= iores->iocb_cnt) {
 426                         qp->fwres.iocbs_used -= iores->iocb_cnt;
 427                 } else {
 428                         // should not happen
 429                         qp->fwres.iocbs_used = 0;
 430                 }
 431                 break;
 432         }
 433         iores->res_type = RESOURCE_NONE;
 434 }