1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * QLogic Fibre Channel HBA Driver
4 * Copyright (c) 2003-2014 QLogic Corporation
7 #include "qla_target.h"
9 * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
10 * Continuation Type 1 IOCBs to allocate.
13 * @dsds: number of data segment descriptors needed
15 * Returns the number of IOCB entries needed to store @dsds.
17 static inline uint16_t
18 qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
24 iocbs += (dsds - 1) / 5;
32 * qla2x00_debounce_register
36 * port = register address.
41 static __inline__ uint16_t
42 qla2x00_debounce_register(volatile __le16 __iomem *addr)
44 volatile uint16_t first;
45 volatile uint16_t second;
48 first = rd_reg_word(addr);
51 second = rd_reg_word(addr);
52 } while (first != second);
58 qla2x00_poll(struct rsp_que *rsp)
60 struct qla_hw_data *ha = rsp->hw;
65 ha->isp_ops->intr_handler(0, rsp);
68 static inline uint8_t *
69 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
71 uint32_t *ifcp = (uint32_t *) fcp;
72 uint32_t *ofcp = (uint32_t *) fcp;
73 uint32_t iter = bsize >> 2;
76 *ofcp++ = swab32(*ifcp++);
82 host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
84 uint32_t *isrc = (uint32_t *) src;
85 __le32 *odest = (__le32 *) dst;
86 uint32_t iter = bsize >> 2;
88 for ( ; iter--; isrc++)
89 *odest++ = cpu_to_le32(*isrc);
93 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
95 struct dsd_dma *dsd, *tdsd;
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,
101 list_del(&dsd->list);
104 INIT_LIST_HEAD(&ctx->dsd_list);
108 qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state)
111 uint8_t shiftbits, mask;
112 uint8_t port_dstate_str_sz;
114 /* This will have to change when the max no. of states > 16 */
116 mask = (1 << shiftbits) - 1;
118 port_dstate_str_sz = sizeof(port_dstate_str) / sizeof(char *);
119 fcport->disc_state = state;
121 old_val = atomic_read(&fcport->shadow_disc_state);
122 if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state,
123 old_val, (old_val << shiftbits) | state)) {
124 ql_dbg(ql_dbg_disc, fcport->vha, 0x2134,
125 "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n",
126 fcport->port_name, (old_val & mask) < port_dstate_str_sz ?
127 port_dstate_str[old_val & mask] : "Unknown",
128 port_dstate_str[state], fcport->d_id.b24);
135 qla2x00_hba_err_chk_enabled(srb_t *sp)
138 * Uncomment when corresponding SCSI changes are done.
140 if (!sp->cmd->prot_chk)
144 switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
145 case SCSI_PROT_READ_STRIP:
146 case SCSI_PROT_WRITE_INSERT:
147 if (ql2xenablehba_err_chk >= 1)
150 case SCSI_PROT_READ_PASS:
151 case SCSI_PROT_WRITE_PASS:
152 if (ql2xenablehba_err_chk >= 2)
155 case SCSI_PROT_READ_INSERT:
156 case SCSI_PROT_WRITE_STRIP:
163 qla2x00_reset_active(scsi_qla_host_t *vha)
165 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
167 /* Test appropriate base-vha and vha flags. */
168 return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
169 test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
170 test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
171 test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
172 test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
176 qla2x00_chip_is_down(scsi_qla_host_t *vha)
178 return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
181 static void qla2xxx_init_sp(srb_t *sp, scsi_qla_host_t *vha,
182 struct qla_qpair *qpair, fc_port_t *fcport)
184 memset(sp, 0, sizeof(*sp));
189 sp->cmd_type = TYPE_SRB;
190 /* ref : INIT - normal flow */
191 kref_init(&sp->cmd_kref);
192 INIT_LIST_HEAD(&sp->elem);
195 static inline srb_t *
196 qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
197 fc_port_t *fcport, gfp_t flag)
202 QLA_QPAIR_MARK_BUSY(qpair, bail);
206 sp = mempool_alloc(qpair->srb_mempool, flag);
208 qla2xxx_init_sp(sp, vha, qpair, fcport);
210 QLA_QPAIR_MARK_NOT_BUSY(qpair);
214 void qla2xxx_rel_done_warning(srb_t *sp, int res);
215 void qla2xxx_rel_free_warning(srb_t *sp);
218 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
221 sp->done = qla2xxx_rel_done_warning;
222 sp->free = qla2xxx_rel_free_warning;
223 mempool_free(sp, qpair->srb_mempool);
224 QLA_QPAIR_MARK_NOT_BUSY(qpair);
227 static inline srb_t *
228 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
231 struct qla_qpair *qpair;
233 if (unlikely(qla_vha_mark_busy(vha)))
236 qpair = vha->hw->base_qpair;
237 sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
244 QLA_VHA_MARK_NOT_BUSY(vha);
249 qla2x00_rel_sp(srb_t *sp)
251 QLA_VHA_MARK_NOT_BUSY(sp->vha);
252 qla2xxx_rel_qpair_sp(sp->qpair, sp);
256 qla2x00_gid_list_size(struct qla_hw_data *ha)
259 return sizeof(uint32_t) * 32;
261 return sizeof(struct gid_list_info) * ha->max_fibre_devices;
265 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
267 if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
268 (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
269 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
270 clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
271 complete(&ha->mbx_intr_comp);
276 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t sts_qual)
280 #define SQ_SCOPE_MASK 0xc000 /* SAM-6 rev5 5.3.2 */
281 #define SQ_SCOPE_SHIFT 14
282 #define SQ_QUAL_MASK 0x3fff
284 #define SQ_MAX_WAIT_SEC 60 /* Max I/O hold off time in seconds. */
285 #define SQ_MAX_WAIT_TIME (SQ_MAX_WAIT_SEC * 10) /* in 100ms. */
287 if (!sts_qual) /* Common case. */
290 scope = (sts_qual & SQ_SCOPE_MASK) >> SQ_SCOPE_SHIFT;
291 /* Handle only scope 1 or 2, which is for I-T nexus. */
292 if (scope != 1 && scope != 2)
295 /* Skip processing, if retry delay timer is already in effect. */
296 if (fcport->retry_delay_timestamp &&
297 time_before(jiffies, fcport->retry_delay_timestamp))
300 qual = sts_qual & SQ_QUAL_MASK;
301 if (qual < 1 || qual > 0x3fef)
303 qual = min(qual, (u16)SQ_MAX_WAIT_TIME);
305 /* qual is expressed in 100ms increments. */
306 fcport->retry_delay_timestamp = jiffies + (qual * HZ / 10);
308 ql_log(ql_log_warn, fcport->vha, 0x5101,
309 "%8phC: I/O throttling requested (status qualifier = %04xh), holding off I/Os for %ums.\n",
310 fcport->port_name, sts_qual, qual * 100);
314 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
316 if (qla_ini_mode_enabled(vha) &&
317 (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
319 else if (qla_tgt_mode_enabled(vha) &&
320 (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
322 else if (qla_dual_mode_enabled(vha) &&
323 ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
330 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
332 qpair->cpuid = cpuid;
334 if (!list_empty(&qpair->hints_list)) {
335 struct qla_qpair_hint *h;
337 list_for_each_entry(h, &qpair->hints_list, hint_elem)
338 h->cpuid = qpair->cpuid;
342 static inline struct qla_qpair_hint *
343 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
345 struct qla_qpair_hint *h;
348 for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
349 h = &tgt->qphints[i];
350 if (h->qpair == qpair)
358 qla_83xx_start_iocbs(struct qla_qpair *qpair)
360 struct req_que *req = qpair->req;
363 if (req->ring_index == req->length) {
365 req->ring_ptr = req->ring;
369 wrt_reg_dword(req->req_q_in, req->ring_index);
373 qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
378 ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
381 return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
386 RESOURCE_IOCB = BIT_0,
387 RESOURCE_EXCH = BIT_1, /* exchange */
388 RESOURCE_FORCE = BIT_2,
393 qla_get_fw_resources(struct qla_qpair *qp, struct iocb_resource *iores)
397 struct qla_hw_data *ha = qp->hw;
399 if (!ql2xenforce_iocb_limit) {
400 iores->res_type = RESOURCE_NONE;
403 if (iores->res_type & RESOURCE_FORCE)
406 if ((iores->iocb_cnt + qp->fwres.iocbs_used) >= qp->fwres.iocbs_qp_limit) {
407 /* no need to acquire qpair lock. It's just rough calculation */
408 iocbs_used = ha->base_qpair->fwres.iocbs_used;
409 for (i = 0; i < ha->max_qpairs; i++) {
410 if (ha->queue_pair_map[i])
411 iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
414 if ((iores->iocb_cnt + iocbs_used) >= qp->fwres.iocbs_limit) {
415 iores->res_type = RESOURCE_NONE;
420 if (iores->res_type & RESOURCE_EXCH) {
421 exch_used = ha->base_qpair->fwres.exch_used;
422 for (i = 0; i < ha->max_qpairs; i++) {
423 if (ha->queue_pair_map[i])
424 exch_used += ha->queue_pair_map[i]->fwres.exch_used;
427 if ((exch_used + iores->exch_cnt) >= qp->fwres.exch_limit) {
428 iores->res_type = RESOURCE_NONE;
433 if (ql2xenforce_iocb_limit == 2) {
434 if ((iores->iocb_cnt + atomic_read(&ha->fwres.iocb_used)) >=
435 ha->fwres.iocb_limit) {
436 iores->res_type = RESOURCE_NONE;
440 if (iores->res_type & RESOURCE_EXCH) {
441 if ((iores->exch_cnt + atomic_read(&ha->fwres.exch_used)) >=
442 ha->fwres.exch_limit) {
443 iores->res_type = RESOURCE_NONE;
450 qp->fwres.iocbs_used += iores->iocb_cnt;
451 qp->fwres.exch_used += iores->exch_cnt;
452 if (ql2xenforce_iocb_limit == 2) {
453 atomic_add(iores->iocb_cnt, &ha->fwres.iocb_used);
454 atomic_add(iores->exch_cnt, &ha->fwres.exch_used);
455 iores->res_type |= RESOURCE_HA;
461 * decrement to zero. This routine will not decrement below zero
462 * @v: pointer of type atomic_t
463 * @amount: amount to decrement from v
465 static void qla_atomic_dtz(atomic_t *v, int amount)
472 if (unlikely(dec < 0))
475 old = atomic_cmpxchg((v), c, dec);
476 if (likely(old == c))
483 qla_put_fw_resources(struct qla_qpair *qp, struct iocb_resource *iores)
485 struct qla_hw_data *ha = qp->hw;
487 if (iores->res_type & RESOURCE_HA) {
488 if (iores->res_type & RESOURCE_IOCB)
489 qla_atomic_dtz(&ha->fwres.iocb_used, iores->iocb_cnt);
491 if (iores->res_type & RESOURCE_EXCH)
492 qla_atomic_dtz(&ha->fwres.exch_used, iores->exch_cnt);
495 if (iores->res_type & RESOURCE_IOCB) {
496 if (qp->fwres.iocbs_used >= iores->iocb_cnt) {
497 qp->fwres.iocbs_used -= iores->iocb_cnt;
499 /* should not happen */
500 qp->fwres.iocbs_used = 0;
504 if (iores->res_type & RESOURCE_EXCH) {
505 if (qp->fwres.exch_used >= iores->exch_cnt) {
506 qp->fwres.exch_used -= iores->exch_cnt;
508 /* should not happen */
509 qp->fwres.exch_used = 0;
512 iores->res_type = RESOURCE_NONE;
515 #define ISP_REG_DISCONNECT 0xffffffffU
516 /**************************************************************************
517 * qla2x00_isp_reg_stat
520 * Read the host status register of ISP before aborting the command.
523 * ha = pointer to host adapter structure.
527 * Either true or false.
529 * Note: Return true if there is register disconnect.
530 **************************************************************************/
532 uint32_t qla2x00_isp_reg_stat(struct qla_hw_data *ha)
534 struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
535 struct device_reg_82xx __iomem *reg82 = &ha->iobase->isp82;
538 return ((rd_reg_dword(®82->host_int)) == ISP_REG_DISCONNECT);
540 return ((rd_reg_dword(®->host_status)) ==
545 bool qla_pci_disconnected(struct scsi_qla_host *vha,
546 struct device_reg_24xx __iomem *reg)
551 stat = rd_reg_dword(®->host_status);
552 if (stat == 0xffffffff) {
553 ql_log(ql_log_info, vha, 0x8041,
554 "detected PCI disconnect.\n");
555 qla_schedule_eeh_work(vha);
562 fcport_is_smaller(fc_port_t *fcport)
564 if (wwn_to_u64(fcport->port_name) <
565 wwn_to_u64(fcport->vha->port_name))
572 fcport_is_bigger(fc_port_t *fcport)
574 return !fcport_is_smaller(fcport);
577 static inline struct qla_qpair *
578 qla_mapq_nvme_select_qpair(struct qla_hw_data *ha, struct qla_qpair *qpair)
580 int cpuid = smp_processor_id();
582 if (qpair->cpuid != cpuid &&
583 ha->qp_cpu_map[cpuid]) {
584 qpair = ha->qp_cpu_map[cpuid];
590 qla_mapq_init_qp_cpu_map(struct qla_hw_data *ha,
591 struct qla_msix_entry *msix,
592 struct qla_qpair *qpair)
594 const struct cpumask *mask;
599 mask = pci_irq_get_affinity(ha->pdev, msix->vector_base0);
602 qpair->cpuid = cpumask_first(mask);
603 for_each_cpu(cpu, mask) {
604 ha->qp_cpu_map[cpu] = qpair;
606 msix->cpuid = qpair->cpuid;
607 qpair->cpu_mapped = true;
611 qla_mapq_free_qp_cpu_map(struct qla_hw_data *ha)
613 if (ha->qp_cpu_map) {
614 kfree(ha->qp_cpu_map);
615 ha->qp_cpu_map = NULL;
619 static inline int qla_mapq_alloc_qp_cpu_map(struct qla_hw_data *ha)
621 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
623 if (!ha->qp_cpu_map) {
624 ha->qp_cpu_map = kcalloc(NR_CPUS, sizeof(struct qla_qpair *),
626 if (!ha->qp_cpu_map) {
627 ql_log(ql_log_fatal, vha, 0x0180,
628 "Unable to allocate memory for qp_cpu_map ptrs.\n");