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_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
  95 {
  96         struct dsd_dma *dsd, *tdsd;
  97
  98         /* clean up allocated prev pool */
  99         list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
 100                 dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
 101                     dsd->dsd_list_dma);
 102                 list_del(&dsd->list);
 103                 kfree(dsd);
 104         }
 105         INIT_LIST_HEAD(&ctx->dsd_list);
 106 }
 107
 108 static inline void
 109 qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state)
 110 {
 111         int old_val;
 112         uint8_t shiftbits, mask;
 113
 114         /* This will have to change when the max no. of states > 16 */
 115         shiftbits = 4;
 116         mask = (1 << shiftbits) - 1;
 117
 118         fcport->disc_state = state;
 119         while (1) {
 120                 old_val = atomic_read(&fcport->shadow_disc_state);
 121                 if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state,
 122                     old_val, (old_val << shiftbits) | state)) {
 123                         ql_dbg(ql_dbg_disc, fcport->vha, 0x2134,
 124                             "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n",
 125                             fcport->port_name, port_dstate_str[old_val & mask],
 126                             port_dstate_str[state], fcport->d_id.b24);
 127                         return;
 128                 }
 129         }
 130 }
 131
 132 static inline int
 133 qla2x00_hba_err_chk_enabled(srb_t *sp)
 134 {
 135         /*
 136          * Uncomment when corresponding SCSI changes are done.
 137          *
 138         if (!sp->cmd->prot_chk)
 139                 return 0;
 140          *
 141          */
 142         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
 143         case SCSI_PROT_READ_STRIP:
 144         case SCSI_PROT_WRITE_INSERT:
 145                 if (ql2xenablehba_err_chk >= 1)
 146                         return 1;
 147                 break;
 148         case SCSI_PROT_READ_PASS:
 149         case SCSI_PROT_WRITE_PASS:
 150                 if (ql2xenablehba_err_chk >= 2)
 151                         return 1;
 152                 break;
 153         case SCSI_PROT_READ_INSERT:
 154         case SCSI_PROT_WRITE_STRIP:
 155                 return 1;
 156         }
 157         return 0;
 158 }
 159
 160 static inline int
 161 qla2x00_reset_active(scsi_qla_host_t *vha)
 162 {
 163         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 164
 165         /* Test appropriate base-vha and vha flags. */
 166         return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
 167             test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
 168             test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
 169             test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
 170             test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 171 }
 172
 173 static inline int
 174 qla2x00_chip_is_down(scsi_qla_host_t *vha)
 175 {
 176         return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
 177 }
 178
 179 static void qla2xxx_init_sp(srb_t *sp, scsi_qla_host_t *vha,
 180                             struct qla_qpair *qpair, fc_port_t *fcport)
 181 {
 182         memset(sp, 0, sizeof(*sp));
 183         sp->fcport = fcport;
 184         sp->iocbs = 1;
 185         sp->vha = vha;
 186         sp->qpair = qpair;
 187         sp->cmd_type = TYPE_SRB;
 188         INIT_LIST_HEAD(&sp->elem);
 189 }
 190
 191 static inline srb_t *
 192 qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
 193     fc_port_t *fcport, gfp_t flag)
 194 {
 195         srb_t *sp = NULL;
 196         uint8_t bail;
 197
 198         QLA_QPAIR_MARK_BUSY(qpair, bail);
 199         if (unlikely(bail))
 200                 return NULL;
 201
 202         sp = mempool_alloc(qpair->srb_mempool, flag);
 203         if (sp)
 204                 qla2xxx_init_sp(sp, vha, qpair, fcport);
 205         else
 206                 QLA_QPAIR_MARK_NOT_BUSY(qpair);
 207         return sp;
 208 }
 209
 210 static inline void
 211 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
 212 {
 213         sp->qpair = NULL;
 214         mempool_free(sp, qpair->srb_mempool);
 215         QLA_QPAIR_MARK_NOT_BUSY(qpair);
 216 }
 217
 218 static inline srb_t *
 219 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 220 {
 221         srb_t *sp = NULL;
 222         uint8_t bail;
 223         struct qla_qpair *qpair;
 224
 225         QLA_VHA_MARK_BUSY(vha, bail);
 226         if (unlikely(bail))
 227                 return NULL;
 228
 229         qpair = vha->hw->base_qpair;
 230         sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
 231         if (!sp)
 232                 goto done;
 233
 234         sp->vha = vha;
 235 done:
 236         if (!sp)
 237                 QLA_VHA_MARK_NOT_BUSY(vha);
 238         return sp;
 239 }
 240
 241 static inline void
 242 qla2x00_rel_sp(srb_t *sp)
 243 {
 244         QLA_VHA_MARK_NOT_BUSY(sp->vha);
 245         qla2xxx_rel_qpair_sp(sp->qpair, sp);
 246 }
 247
 248 static inline int
 249 qla2x00_gid_list_size(struct qla_hw_data *ha)
 250 {
 251         if (IS_QLAFX00(ha))
 252                 return sizeof(uint32_t) * 32;
 253         else
 254                 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
 255 }
 256
 257 static inline void
 258 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
 259 {
 260         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 261             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 262                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 263                 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 264                 complete(&ha->mbx_intr_comp);
 265         }
 266 }
 267
 268 static inline void
 269 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
 270 {
 271         if (retry_delay)
 272                 fcport->retry_delay_timestamp = jiffies +
 273                     (retry_delay * HZ / 10);
 274 }
 275
 276 static inline bool
 277 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
 278 {
 279         if (qla_ini_mode_enabled(vha) &&
 280             (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
 281                 return true;
 282         else if (qla_tgt_mode_enabled(vha) &&
 283             (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
 284                 return true;
 285         else if (qla_dual_mode_enabled(vha) &&
 286             ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
 287                 return true;
 288         else
 289                 return false;
 290 }
 291
 292 static inline void
 293 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
 294 {
 295         qpair->cpuid = cpuid;
 296
 297         if (!list_empty(&qpair->hints_list)) {
 298                 struct qla_qpair_hint *h;
 299
 300                 list_for_each_entry(h, &qpair->hints_list, hint_elem)
 301                         h->cpuid = qpair->cpuid;
 302         }
 303 }
 304
 305 static inline struct qla_qpair_hint *
 306 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
 307 {
 308         struct qla_qpair_hint *h;
 309         u16 i;
 310
 311         for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
 312                 h = &tgt->qphints[i];
 313                 if (h->qpair == qpair)
 314                         return h;
 315         }
 316
 317         return NULL;
 318 }
 319
 320 static inline void
 321 qla_83xx_start_iocbs(struct qla_qpair *qpair)
 322 {
 323         struct req_que *req = qpair->req;
 324
 325         req->ring_index++;
 326         if (req->ring_index == req->length) {
 327                 req->ring_index = 0;
 328                 req->ring_ptr = req->ring;
 329         } else
 330                 req->ring_ptr++;
 331
 332         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 333 }
 334
 335 static inline int
 336 qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
 337 {
 338         uint32_t data;
 339
 340         data =
 341             ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
 342
 343
 344         return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
 345 }