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