/* * Copyright (c) 2015 Linaro Ltd. * Copyright (c) 2015 Hisilicon Limited. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * */ #include "hisi_sas.h" #define DRV_NAME "hisi_sas" #define DEV_IS_GONE(dev) \ ((!dev) || (dev->dev_type == SAS_PHY_UNUSED)) static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, u8 *lun, struct hisi_sas_tmf_task *tmf); static int hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, struct domain_device *device, int abort_flag, int tag); static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) { return device->port->ha->lldd_ha; } static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) { void *bitmap = hisi_hba->slot_index_tags; clear_bit(slot_idx, bitmap); } static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) { hisi_sas_slot_index_clear(hisi_hba, slot_idx); } static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) { void *bitmap = hisi_hba->slot_index_tags; set_bit(slot_idx, bitmap); } static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx) { unsigned int index; void *bitmap = hisi_hba->slot_index_tags; index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count); if (index >= hisi_hba->slot_index_count) return -SAS_QUEUE_FULL; hisi_sas_slot_index_set(hisi_hba, index); *slot_idx = index; return 0; } static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba) { int i; for (i = 0; i < hisi_hba->slot_index_count; ++i) hisi_sas_slot_index_clear(hisi_hba, i); } void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, struct hisi_sas_slot *slot) { struct device *dev = &hisi_hba->pdev->dev; if (!slot->task) return; if (!sas_protocol_ata(task->task_proto)) if (slot->n_elem) dma_unmap_sg(dev, task->scatter, slot->n_elem, task->data_dir); if (slot->command_table) dma_pool_free(hisi_hba->command_table_pool, slot->command_table, slot->command_table_dma); if (slot->status_buffer) dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer, slot->status_buffer_dma); if (slot->sge_page) dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page, slot->sge_page_dma); list_del_init(&slot->entry); task->lldd_task = NULL; slot->task = NULL; slot->port = NULL; hisi_sas_slot_index_free(hisi_hba, slot->idx); /* slot memory is fully zeroed when it is reused */ } EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot) { return hisi_hba->hw->prep_smp(hisi_hba, slot); } static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot, int is_tmf, struct hisi_sas_tmf_task *tmf) { return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf); } static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot) { return hisi_hba->hw->prep_stp(hisi_hba, slot); } static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot, int device_id, int abort_flag, int tag_to_abort) { return hisi_hba->hw->prep_abort(hisi_hba, slot, device_id, abort_flag, tag_to_abort); } /* * This function will issue an abort TMF regardless of whether the * task is in the sdev or not. Then it will do the task complete * cleanup and callbacks. */ static void hisi_sas_slot_abort(struct work_struct *work) { struct hisi_sas_slot *abort_slot = container_of(work, struct hisi_sas_slot, abort_slot); struct sas_task *task = abort_slot->task; struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); struct scsi_cmnd *cmnd = task->uldd_task; struct hisi_sas_tmf_task tmf_task; struct domain_device *device = task->dev; struct hisi_sas_device *sas_dev = device->lldd_dev; struct scsi_lun lun; struct device *dev = &hisi_hba->pdev->dev; int tag = abort_slot->idx; if (!(task->task_proto & SAS_PROTOCOL_SSP)) { dev_err(dev, "cannot abort slot for non-ssp task\n"); goto out; } int_to_scsilun(cmnd->device->lun, &lun); tmf_task.tmf = TMF_ABORT_TASK; tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task); out: /* Do cleanup for this task */ hisi_sas_slot_task_free(hisi_hba, task, abort_slot); if (task->task_done) task->task_done(task); if (sas_dev && sas_dev->running_req) sas_dev->running_req--; } static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba, int is_tmf, struct hisi_sas_tmf_task *tmf, int *pass) { struct domain_device *device = task->dev; struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_sas_port *port; struct hisi_sas_slot *slot; struct hisi_sas_cmd_hdr *cmd_hdr_base; struct device *dev = &hisi_hba->pdev->dev; int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; if (!device->port) { struct task_status_struct *ts = &task->task_status; ts->resp = SAS_TASK_UNDELIVERED; ts->stat = SAS_PHY_DOWN; /* * libsas will use dev->port, should * not call task_done for sata */ if (device->dev_type != SAS_SATA_DEV) task->task_done(task); return 0; } if (DEV_IS_GONE(sas_dev)) { if (sas_dev) dev_info(dev, "task prep: device %llu not ready\n", sas_dev->device_id); else dev_info(dev, "task prep: device %016llx not ready\n", SAS_ADDR(device->sas_addr)); rc = SAS_PHY_DOWN; return rc; } port = device->port->lldd_port; if (port && !port->port_attached) { if (sas_protocol_ata(task->task_proto)) { struct task_status_struct *ts = &task->task_status; dev_info(dev, "task prep: SATA/STP port%d not attach device\n", device->port->id); ts->resp = SAS_TASK_COMPLETE; ts->stat = SAS_PHY_DOWN; task->task_done(task); } else { struct task_status_struct *ts = &task->task_status; dev_info(dev, "task prep: SAS port%d does not attach device\n", device->port->id); ts->resp = SAS_TASK_UNDELIVERED; ts->stat = SAS_PHY_DOWN; task->task_done(task); } return 0; } if (!sas_protocol_ata(task->task_proto)) { if (task->num_scatter) { n_elem = dma_map_sg(dev, task->scatter, task->num_scatter, task->data_dir); if (!n_elem) { rc = -ENOMEM; goto prep_out; } } } else n_elem = task->num_scatter; if (hisi_hba->hw->slot_index_alloc) rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx, device); else rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx); if (rc) goto err_out; rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue, &dlvry_queue_slot); if (rc) goto err_out_tag; slot = &hisi_hba->slot_info[slot_idx]; memset(slot, 0, sizeof(struct hisi_sas_slot)); slot->idx = slot_idx; slot->n_elem = n_elem; slot->dlvry_queue = dlvry_queue; slot->dlvry_queue_slot = dlvry_queue_slot; cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; slot->task = task; slot->port = port; task->lldd_task = slot; INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort); slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool, GFP_ATOMIC, &slot->status_buffer_dma); if (!slot->status_buffer) { rc = -ENOMEM; goto err_out_slot_buf; } memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ); slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool, GFP_ATOMIC, &slot->command_table_dma); if (!slot->command_table) { rc = -ENOMEM; goto err_out_status_buf; } memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ); memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); switch (task->task_proto) { case SAS_PROTOCOL_SMP: rc = hisi_sas_task_prep_smp(hisi_hba, slot); break; case SAS_PROTOCOL_SSP: rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf); break; case SAS_PROTOCOL_SATA: case SAS_PROTOCOL_STP: case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: rc = hisi_sas_task_prep_ata(hisi_hba, slot); break; default: dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n", task->task_proto); rc = -EINVAL; break; } if (rc) { dev_err(dev, "task prep: rc = 0x%x\n", rc); if (slot->sge_page) goto err_out_sge; goto err_out_command_table; } list_add_tail(&slot->entry, &port->list); spin_lock(&task->task_state_lock); task->task_state_flags |= SAS_TASK_AT_INITIATOR; spin_unlock(&task->task_state_lock); hisi_hba->slot_prep = slot; sas_dev->running_req++; ++(*pass); return 0; err_out_sge: dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page, slot->sge_page_dma); err_out_command_table: dma_pool_free(hisi_hba->command_table_pool, slot->command_table, slot->command_table_dma); err_out_status_buf: dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer, slot->status_buffer_dma); err_out_slot_buf: /* Nothing to be done */ err_out_tag: hisi_sas_slot_index_free(hisi_hba, slot_idx); err_out: dev_err(dev, "task prep: failed[%d]!\n", rc); if (!sas_protocol_ata(task->task_proto)) if (n_elem) dma_unmap_sg(dev, task->scatter, n_elem, task->data_dir); prep_out: return rc; } static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags, int is_tmf, struct hisi_sas_tmf_task *tmf) { u32 rc; u32 pass = 0; unsigned long flags; struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); struct device *dev = &hisi_hba->pdev->dev; /* protect task_prep and start_delivery sequence */ spin_lock_irqsave(&hisi_hba->lock, flags); rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass); if (rc) dev_err(dev, "task exec: failed[%d]!\n", rc); if (likely(pass)) hisi_hba->hw->start_delivery(hisi_hba); spin_unlock_irqrestore(&hisi_hba->lock, flags); return rc; } static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no) { struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; struct asd_sas_phy *sas_phy = &phy->sas_phy; struct sas_ha_struct *sas_ha; if (!phy->phy_attached) return; sas_ha = &hisi_hba->sha; sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE); if (sas_phy->phy) { struct sas_phy *sphy = sas_phy->phy; sphy->negotiated_linkrate = sas_phy->linkrate; sphy->minimum_linkrate = phy->minimum_linkrate; sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; sphy->maximum_linkrate = phy->maximum_linkrate; } if (phy->phy_type & PORT_TYPE_SAS) { struct sas_identify_frame *id; id = (struct sas_identify_frame *)phy->frame_rcvd; id->dev_type = phy->identify.device_type; id->initiator_bits = SAS_PROTOCOL_ALL; id->target_bits = phy->identify.target_port_protocols; } else if (phy->phy_type & PORT_TYPE_SATA) { /*Nothing*/ } sas_phy->frame_rcvd_size = phy->frame_rcvd_size; sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED); } static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) { struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); struct hisi_sas_device *sas_dev = NULL; int i; spin_lock(&hisi_hba->lock); for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) { hisi_hba->devices[i].device_id = i; sas_dev = &hisi_hba->devices[i]; sas_dev->dev_status = HISI_SAS_DEV_NORMAL; sas_dev->dev_type = device->dev_type; sas_dev->hisi_hba = hisi_hba; sas_dev->sas_device = device; break; } } spin_unlock(&hisi_hba->lock); return sas_dev; } static int hisi_sas_dev_found(struct domain_device *device) { struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); struct domain_device *parent_dev = device->parent; struct hisi_sas_device *sas_dev; struct device *dev = &hisi_hba->pdev->dev; if (hisi_hba->hw->alloc_dev) sas_dev = hisi_hba->hw->alloc_dev(device); else sas_dev = hisi_sas_alloc_dev(device); if (!sas_dev) { dev_err(dev, "fail alloc dev: max support %d devices\n", HISI_SAS_MAX_DEVICES); return -EINVAL; } device->lldd_dev = sas_dev; hisi_hba->hw->setup_itct(hisi_hba, sas_dev); if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) { int phy_no; u8 phy_num = parent_dev->ex_dev.num_phys; struct ex_phy *phy; for (phy_no = 0; phy_no < phy_num; phy_no++) { phy = &parent_dev->ex_dev.ex_phy[phy_no]; if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(device->sas_addr)) { sas_dev->attached_phy = phy_no; break; } } if (phy_no == phy_num) { dev_info(dev, "dev found: no attached " "dev:%016llx at ex:%016llx\n", SAS_ADDR(device->sas_addr), SAS_ADDR(parent_dev->sas_addr)); return -EINVAL; } } return 0; } static int hisi_sas_slave_configure(struct scsi_device *sdev) { struct domain_device *dev = sdev_to_domain_dev(sdev); int ret = sas_slave_configure(sdev); if (ret) return ret; if (!dev_is_sata(dev)) sas_change_queue_depth(sdev, 64); return 0; } static void hisi_sas_scan_start(struct Scsi_Host *shost) { struct hisi_hba *hisi_hba = shost_priv(shost); int i; for (i = 0; i < hisi_hba->n_phy; ++i) hisi_sas_bytes_dmaed(hisi_hba, i); hisi_hba->scan_finished = 1; } static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time) { struct hisi_hba *hisi_hba = shost_priv(shost); struct sas_ha_struct *sha = &hisi_hba->sha; if (hisi_hba->scan_finished == 0) return 0; sas_drain_work(sha); return 1; } static void hisi_sas_phyup_work(struct work_struct *work) { struct hisi_sas_phy *phy = container_of(work, struct hisi_sas_phy, phyup_ws); struct hisi_hba *hisi_hba = phy->hisi_hba; struct asd_sas_phy *sas_phy = &phy->sas_phy; int phy_no = sas_phy->id; hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */ hisi_sas_bytes_dmaed(hisi_hba, phy_no); } static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) { struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; struct asd_sas_phy *sas_phy = &phy->sas_phy; phy->hisi_hba = hisi_hba; phy->port = NULL; init_timer(&phy->timer); sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0; sas_phy->class = SAS; sas_phy->iproto = SAS_PROTOCOL_ALL; sas_phy->tproto = 0; sas_phy->type = PHY_TYPE_PHYSICAL; sas_phy->role = PHY_ROLE_INITIATOR; sas_phy->oob_mode = OOB_NOT_CONNECTED; sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; sas_phy->id = phy_no; sas_phy->sas_addr = &hisi_hba->sas_addr[0]; sas_phy->frame_rcvd = &phy->frame_rcvd[0]; sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata; sas_phy->lldd_phy = phy; INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work); } static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) { struct sas_ha_struct *sas_ha = sas_phy->ha; struct hisi_hba *hisi_hba = sas_ha->lldd_ha; struct hisi_sas_phy *phy = sas_phy->lldd_phy; struct asd_sas_port *sas_port = sas_phy->port; struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id]; unsigned long flags; if (!sas_port) return; spin_lock_irqsave(&hisi_hba->lock, flags); port->port_attached = 1; port->id = phy->port_id; phy->port = port; sas_port->lldd_port = port; spin_unlock_irqrestore(&hisi_hba->lock, flags); } static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no, struct domain_device *device) { struct hisi_sas_phy *phy; struct hisi_sas_port *port; struct hisi_sas_slot *slot, *slot2; struct device *dev = &hisi_hba->pdev->dev; phy = &hisi_hba->phy[phy_no]; port = phy->port; if (!port) return; list_for_each_entry_safe(slot, slot2, &port->list, entry) { struct sas_task *task; task = slot->task; if (device && task->dev != device) continue; dev_info(dev, "Release slot [%d:%d], task [%p]:\n", slot->dlvry_queue, slot->dlvry_queue_slot, task); hisi_hba->hw->slot_complete(hisi_hba, slot, 1); } } static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy) { struct domain_device *device; struct hisi_sas_phy *phy = sas_phy->lldd_phy; struct asd_sas_port *sas_port = sas_phy->port; list_for_each_entry(device, &sas_port->dev_list, dev_list_node) hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device); } static void hisi_sas_release_task(struct hisi_hba *hisi_hba, struct domain_device *device) { struct asd_sas_port *port = device->port; struct asd_sas_phy *sas_phy; list_for_each_entry(sas_phy, &port->phy_list, port_phy_el) hisi_sas_do_release_task(hisi_hba, sas_phy->id, device); } static void hisi_sas_dev_gone(struct domain_device *device) { struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); struct device *dev = &hisi_hba->pdev->dev; u64 dev_id = sas_dev->device_id; dev_info(dev, "found dev[%lld:%x] is gone\n", sas_dev->device_id, sas_dev->dev_type); hisi_sas_internal_task_abort(hisi_hba, device, HISI_SAS_INT_ABT_DEV, 0); hisi_hba->hw->free_device(hisi_hba, sas_dev); device->lldd_dev = NULL; memset(sas_dev, 0, sizeof(*sas_dev)); sas_dev->device_id = dev_id; sas_dev->dev_type = SAS_PHY_UNUSED; sas_dev->dev_status = HISI_SAS_DEV_NORMAL; } static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) { return hisi_sas_task_exec(task, gfp_flags, 0, NULL); } static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, void *funcdata) { struct sas_ha_struct *sas_ha = sas_phy->ha; struct hisi_hba *hisi_hba = sas_ha->lldd_ha; int phy_no = sas_phy->id; switch (func) { case PHY_FUNC_HARD_RESET: hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); break; case PHY_FUNC_LINK_RESET: hisi_hba->hw->phy_enable(hisi_hba, phy_no); hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); break; case PHY_FUNC_DISABLE: hisi_hba->hw->phy_disable(hisi_hba, phy_no); break; case PHY_FUNC_SET_LINK_RATE: case PHY_FUNC_RELEASE_SPINUP_HOLD: default: return -EOPNOTSUPP; } return 0; } static void hisi_sas_task_done(struct sas_task *task) { if (!del_timer(&task->slow_task->timer)) return; complete(&task->slow_task->completion); } static void hisi_sas_tmf_timedout(unsigned long data) { struct sas_task *task = (struct sas_task *)data; task->task_state_flags |= SAS_TASK_STATE_ABORTED; complete(&task->slow_task->completion); } #define TASK_TIMEOUT 20 #define TASK_RETRY 3 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device, void *parameter, u32 para_len, struct hisi_sas_tmf_task *tmf) { struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_hba *hisi_hba = sas_dev->hisi_hba; struct device *dev = &hisi_hba->pdev->dev; struct sas_task *task; int res, retry; for (retry = 0; retry < TASK_RETRY; retry++) { task = sas_alloc_slow_task(GFP_KERNEL); if (!task) return -ENOMEM; task->dev = device; task->task_proto = device->tproto; memcpy(&task->ssp_task, parameter, para_len); task->task_done = hisi_sas_task_done; task->slow_task->timer.data = (unsigned long) task; task->slow_task->timer.function = hisi_sas_tmf_timedout; task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ; add_timer(&task->slow_task->timer); res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf); if (res) { del_timer(&task->slow_task->timer); dev_err(dev, "abort tmf: executing internal task failed: %d\n", res); goto ex_err; } wait_for_completion(&task->slow_task->completion); res = TMF_RESP_FUNC_FAILED; /* Even TMF timed out, return direct. */ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { dev_err(dev, "abort tmf: TMF task[%d] timeout\n", tmf->tag_of_task_to_be_managed); if (task->lldd_task) { struct hisi_sas_slot *slot = task->lldd_task; hisi_sas_slot_task_free(hisi_hba, task, slot); } goto ex_err; } } if (task->task_status.resp == SAS_TASK_COMPLETE && task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { res = TMF_RESP_FUNC_COMPLETE; break; } if (task->task_status.resp == SAS_TASK_COMPLETE && task->task_status.stat == TMF_RESP_FUNC_SUCC) { res = TMF_RESP_FUNC_SUCC; break; } if (task->task_status.resp == SAS_TASK_COMPLETE && task->task_status.stat == SAS_DATA_UNDERRUN) { /* no error, but return the number of bytes of * underrun */ dev_warn(dev, "abort tmf: task to dev %016llx " "resp: 0x%x sts 0x%x underrun\n", SAS_ADDR(device->sas_addr), task->task_status.resp, task->task_status.stat); res = task->task_status.residual; break; } if (task->task_status.resp == SAS_TASK_COMPLETE && task->task_status.stat == SAS_DATA_OVERRUN) { dev_warn(dev, "abort tmf: blocked task error\n"); res = -EMSGSIZE; break; } dev_warn(dev, "abort tmf: task to dev " "%016llx resp: 0x%x status 0x%x\n", SAS_ADDR(device->sas_addr), task->task_status.resp, task->task_status.stat); sas_free_task(task); task = NULL; } ex_err: WARN_ON(retry == TASK_RETRY); sas_free_task(task); return res; } static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, u8 *lun, struct hisi_sas_tmf_task *tmf) { struct sas_ssp_task ssp_task; if (!(device->tproto & SAS_PROTOCOL_SSP)) return TMF_RESP_FUNC_ESUPP; memcpy(ssp_task.LUN, lun, 8); return hisi_sas_exec_internal_tmf_task(device, &ssp_task, sizeof(ssp_task), tmf); } static int hisi_sas_abort_task(struct sas_task *task) { struct scsi_lun lun; struct hisi_sas_tmf_task tmf_task; struct domain_device *device = task->dev; struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); struct device *dev = &hisi_hba->pdev->dev; int rc = TMF_RESP_FUNC_FAILED; unsigned long flags; if (!sas_dev) { dev_warn(dev, "Device has been removed\n"); return TMF_RESP_FUNC_FAILED; } spin_lock_irqsave(&task->task_state_lock, flags); if (task->task_state_flags & SAS_TASK_STATE_DONE) { spin_unlock_irqrestore(&task->task_state_lock, flags); rc = TMF_RESP_FUNC_COMPLETE; goto out; } spin_unlock_irqrestore(&task->task_state_lock, flags); sas_dev->dev_status = HISI_SAS_DEV_EH; if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { struct scsi_cmnd *cmnd = task->uldd_task; struct hisi_sas_slot *slot = task->lldd_task; u32 tag = slot->idx; int_to_scsilun(cmnd->device->lun, &lun); tmf_task.tmf = TMF_ABORT_TASK; tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task); /* if successful, clear the task and callback forwards.*/ if (rc == TMF_RESP_FUNC_COMPLETE) { if (task->lldd_task) { struct hisi_sas_slot *slot; slot = &hisi_hba->slot_info [tmf_task.tag_of_task_to_be_managed]; spin_lock_irqsave(&hisi_hba->lock, flags); hisi_hba->hw->slot_complete(hisi_hba, slot, 1); spin_unlock_irqrestore(&hisi_hba->lock, flags); } } hisi_sas_internal_task_abort(hisi_hba, device, HISI_SAS_INT_ABT_CMD, tag); } else if (task->task_proto & SAS_PROTOCOL_SATA || task->task_proto & SAS_PROTOCOL_STP) { if (task->dev->dev_type == SAS_SATA_DEV) { hisi_sas_internal_task_abort(hisi_hba, device, HISI_SAS_INT_ABT_DEV, 0); rc = TMF_RESP_FUNC_COMPLETE; } } else if (task->task_proto & SAS_PROTOCOL_SMP) { /* SMP */ struct hisi_sas_slot *slot = task->lldd_task; u32 tag = slot->idx; hisi_sas_internal_task_abort(hisi_hba, device, HISI_SAS_INT_ABT_CMD, tag); } out: if (rc != TMF_RESP_FUNC_COMPLETE) dev_notice(dev, "abort task: rc=%d\n", rc); return rc; } static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) { struct hisi_sas_tmf_task tmf_task; int rc = TMF_RESP_FUNC_FAILED; tmf_task.tmf = TMF_ABORT_TASK_SET; rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); return rc; } static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun) { int rc = TMF_RESP_FUNC_FAILED; struct hisi_sas_tmf_task tmf_task; tmf_task.tmf = TMF_CLEAR_ACA; rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); return rc; } static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) { struct sas_phy *phy = sas_get_local_phy(device); int rc, reset_type = (device->dev_type == SAS_SATA_DEV || (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; rc = sas_phy_reset(phy, reset_type); sas_put_local_phy(phy); msleep(2000); return rc; } static int hisi_sas_I_T_nexus_reset(struct domain_device *device) { struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); unsigned long flags; int rc = TMF_RESP_FUNC_FAILED; if (sas_dev->dev_status != HISI_SAS_DEV_EH) return TMF_RESP_FUNC_FAILED; sas_dev->dev_status = HISI_SAS_DEV_NORMAL; rc = hisi_sas_debug_I_T_nexus_reset(device); spin_lock_irqsave(&hisi_hba->lock, flags); hisi_sas_release_task(hisi_hba, device); spin_unlock_irqrestore(&hisi_hba->lock, flags); return 0; } static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) { struct hisi_sas_tmf_task tmf_task; struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); struct device *dev = &hisi_hba->pdev->dev; unsigned long flags; int rc = TMF_RESP_FUNC_FAILED; tmf_task.tmf = TMF_LU_RESET; sas_dev->dev_status = HISI_SAS_DEV_EH; rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); if (rc == TMF_RESP_FUNC_COMPLETE) { spin_lock_irqsave(&hisi_hba->lock, flags); hisi_sas_release_task(hisi_hba, device); spin_unlock_irqrestore(&hisi_hba->lock, flags); } /* If failed, fall-through I_T_Nexus reset */ dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n", sas_dev->device_id, rc); return rc; } static int hisi_sas_query_task(struct sas_task *task) { struct scsi_lun lun; struct hisi_sas_tmf_task tmf_task; int rc = TMF_RESP_FUNC_FAILED; if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { struct scsi_cmnd *cmnd = task->uldd_task; struct domain_device *device = task->dev; struct hisi_sas_slot *slot = task->lldd_task; u32 tag = slot->idx; int_to_scsilun(cmnd->device->lun, &lun); tmf_task.tmf = TMF_QUERY_TASK; tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun, &tmf_task); switch (rc) { /* The task is still in Lun, release it then */ case TMF_RESP_FUNC_SUCC: /* The task is not in Lun or failed, reset the phy */ case TMF_RESP_FUNC_FAILED: case TMF_RESP_FUNC_COMPLETE: break; } } return rc; } static int hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id, struct sas_task *task, int abort_flag, int task_tag) { struct domain_device *device = task->dev; struct hisi_sas_device *sas_dev = device->lldd_dev; struct device *dev = &hisi_hba->pdev->dev; struct hisi_sas_port *port; struct hisi_sas_slot *slot; struct hisi_sas_cmd_hdr *cmd_hdr_base; int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; if (!device->port) return -1; port = device->port->lldd_port; /* simply get a slot and send abort command */ rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx); if (rc) goto err_out; rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue, &dlvry_queue_slot); if (rc) goto err_out_tag; slot = &hisi_hba->slot_info[slot_idx]; memset(slot, 0, sizeof(struct hisi_sas_slot)); slot->idx = slot_idx; slot->n_elem = n_elem; slot->dlvry_queue = dlvry_queue; slot->dlvry_queue_slot = dlvry_queue_slot; cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; slot->task = task; slot->port = port; task->lldd_task = slot; memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id, abort_flag, task_tag); if (rc) goto err_out_tag; /* Port structure is static for the HBA, so * even if the port is deformed it is ok * to reference. */ list_add_tail(&slot->entry, &port->list); spin_lock(&task->task_state_lock); task->task_state_flags |= SAS_TASK_AT_INITIATOR; spin_unlock(&task->task_state_lock); hisi_hba->slot_prep = slot; sas_dev->running_req++; /* send abort command to our chip */ hisi_hba->hw->start_delivery(hisi_hba); return 0; err_out_tag: hisi_sas_slot_index_free(hisi_hba, slot_idx); err_out: dev_err(dev, "internal abort task prep: failed[%d]!\n", rc); return rc; } /** * hisi_sas_internal_task_abort -- execute an internal * abort command for single IO command or a device * @hisi_hba: host controller struct * @device: domain device * @abort_flag: mode of operation, device or single IO * @tag: tag of IO to be aborted (only relevant to single * IO mode) */ static int hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, struct domain_device *device, int abort_flag, int tag) { struct sas_task *task; struct hisi_sas_device *sas_dev = device->lldd_dev; struct device *dev = &hisi_hba->pdev->dev; int res; unsigned long flags; if (!hisi_hba->hw->prep_abort) return -EOPNOTSUPP; task = sas_alloc_slow_task(GFP_KERNEL); if (!task) return -ENOMEM; task->dev = device; task->task_proto = device->tproto; task->task_done = hisi_sas_task_done; task->slow_task->timer.data = (unsigned long)task; task->slow_task->timer.function = hisi_sas_tmf_timedout; task->slow_task->timer.expires = jiffies + 20*HZ; add_timer(&task->slow_task->timer); /* Lock as we are alloc'ing a slot, which cannot be interrupted */ spin_lock_irqsave(&hisi_hba->lock, flags); res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id, task, abort_flag, tag); spin_unlock_irqrestore(&hisi_hba->lock, flags); if (res) { del_timer(&task->slow_task->timer); dev_err(dev, "internal task abort: executing internal task failed: %d\n", res); goto exit; } wait_for_completion(&task->slow_task->completion); res = TMF_RESP_FUNC_FAILED; if (task->task_status.resp == SAS_TASK_COMPLETE && task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { res = TMF_RESP_FUNC_COMPLETE; goto exit; } /* TMF timed out, return direct. */ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { dev_err(dev, "internal task abort: timeout.\n"); if (task->lldd_task) { struct hisi_sas_slot *slot = task->lldd_task; hisi_sas_slot_task_free(hisi_hba, task, slot); } } } exit: dev_info(dev, "internal task abort: task to dev %016llx task=%p " "resp: 0x%x sts 0x%x\n", SAS_ADDR(device->sas_addr), task, task->task_status.resp, /* 0 is complete, -1 is undelivered */ task->task_status.stat); sas_free_task(task); return res; } static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) { hisi_sas_port_notify_formed(sas_phy); } static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy) { hisi_sas_port_notify_deformed(sas_phy); } static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) { phy->phy_attached = 0; phy->phy_type = 0; phy->port = NULL; } void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy) { struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; struct asd_sas_phy *sas_phy = &phy->sas_phy; struct sas_ha_struct *sas_ha = &hisi_hba->sha; if (rdy) { /* Phy down but ready */ hisi_sas_bytes_dmaed(hisi_hba, phy_no); hisi_sas_port_notify_formed(sas_phy); } else { struct hisi_sas_port *port = phy->port; /* Phy down and not ready */ sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL); sas_phy_disconnected(sas_phy); if (port) { if (phy->phy_type & PORT_TYPE_SAS) { int port_id = port->id; if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, port_id)) port->port_attached = 0; } else if (phy->phy_type & PORT_TYPE_SATA) port->port_attached = 0; } hisi_sas_phy_disconnected(phy); } } EXPORT_SYMBOL_GPL(hisi_sas_phy_down); static struct scsi_transport_template *hisi_sas_stt; static struct scsi_host_template hisi_sas_sht = { .module = THIS_MODULE, .name = DRV_NAME, .queuecommand = sas_queuecommand, .target_alloc = sas_target_alloc, .slave_configure = hisi_sas_slave_configure, .scan_finished = hisi_sas_scan_finished, .scan_start = hisi_sas_scan_start, .change_queue_depth = sas_change_queue_depth, .bios_param = sas_bios_param, .can_queue = 1, .this_id = -1, .sg_tablesize = SG_ALL, .max_sectors = SCSI_DEFAULT_MAX_SECTORS, .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_bus_reset_handler = sas_eh_bus_reset_handler, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, }; static struct sas_domain_function_template hisi_sas_transport_ops = { .lldd_dev_found = hisi_sas_dev_found, .lldd_dev_gone = hisi_sas_dev_gone, .lldd_execute_task = hisi_sas_queue_command, .lldd_control_phy = hisi_sas_control_phy, .lldd_abort_task = hisi_sas_abort_task, .lldd_abort_task_set = hisi_sas_abort_task_set, .lldd_clear_aca = hisi_sas_clear_aca, .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, .lldd_lu_reset = hisi_sas_lu_reset, .lldd_query_task = hisi_sas_query_task, .lldd_port_formed = hisi_sas_port_formed, .lldd_port_deformed = hisi_sas_port_deformed, }; static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost) { struct platform_device *pdev = hisi_hba->pdev; struct device *dev = &pdev->dev; int i, s, max_command_entries = hisi_hba->hw->max_command_entries; spin_lock_init(&hisi_hba->lock); for (i = 0; i < hisi_hba->n_phy; i++) { hisi_sas_phy_init(hisi_hba, i); hisi_hba->port[i].port_attached = 0; hisi_hba->port[i].id = -1; INIT_LIST_HEAD(&hisi_hba->port[i].list); } for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; hisi_hba->devices[i].device_id = i; hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL; } for (i = 0; i < hisi_hba->queue_count; i++) { struct hisi_sas_cq *cq = &hisi_hba->cq[i]; struct hisi_sas_dq *dq = &hisi_hba->dq[i]; /* Completion queue structure */ cq->id = i; cq->hisi_hba = hisi_hba; /* Delivery queue structure */ dq->id = i; dq->hisi_hba = hisi_hba; /* Delivery queue */ s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s, &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL); if (!hisi_hba->cmd_hdr[i]) goto err_out; memset(hisi_hba->cmd_hdr[i], 0, s); /* Completion queue */ s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s, &hisi_hba->complete_hdr_dma[i], GFP_KERNEL); if (!hisi_hba->complete_hdr[i]) goto err_out; memset(hisi_hba->complete_hdr[i], 0, s); } s = HISI_SAS_STATUS_BUF_SZ; hisi_hba->status_buffer_pool = dma_pool_create("status_buffer", dev, s, 16, 0); if (!hisi_hba->status_buffer_pool) goto err_out; s = HISI_SAS_COMMAND_TABLE_SZ; hisi_hba->command_table_pool = dma_pool_create("command_table", dev, s, 16, 0); if (!hisi_hba->command_table_pool) goto err_out; s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma, GFP_KERNEL); if (!hisi_hba->itct) goto err_out; memset(hisi_hba->itct, 0, s); hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, sizeof(struct hisi_sas_slot), GFP_KERNEL); if (!hisi_hba->slot_info) goto err_out; s = max_command_entries * sizeof(struct hisi_sas_iost); hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma, GFP_KERNEL); if (!hisi_hba->iost) goto err_out; memset(hisi_hba->iost, 0, s); s = max_command_entries * sizeof(struct hisi_sas_breakpoint); hisi_hba->breakpoint = dma_alloc_coherent(dev, s, &hisi_hba->breakpoint_dma, GFP_KERNEL); if (!hisi_hba->breakpoint) goto err_out; memset(hisi_hba->breakpoint, 0, s); hisi_hba->slot_index_count = max_command_entries; s = hisi_hba->slot_index_count / BITS_PER_BYTE; hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL); if (!hisi_hba->slot_index_tags) goto err_out; hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev, sizeof(struct hisi_sas_sge_page), 16, 0); if (!hisi_hba->sge_page_pool) goto err_out; s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; hisi_hba->initial_fis = dma_alloc_coherent(dev, s, &hisi_hba->initial_fis_dma, GFP_KERNEL); if (!hisi_hba->initial_fis) goto err_out; memset(hisi_hba->initial_fis, 0, s); s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s, &hisi_hba->sata_breakpoint_dma, GFP_KERNEL); if (!hisi_hba->sata_breakpoint) goto err_out; memset(hisi_hba->sata_breakpoint, 0, s); hisi_sas_slot_index_init(hisi_hba); hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); if (!hisi_hba->wq) { dev_err(dev, "sas_alloc: failed to create workqueue\n"); goto err_out; } return 0; err_out: return -ENOMEM; } static void hisi_sas_free(struct hisi_hba *hisi_hba) { struct device *dev = &hisi_hba->pdev->dev; int i, s, max_command_entries = hisi_hba->hw->max_command_entries; for (i = 0; i < hisi_hba->queue_count; i++) { s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; if (hisi_hba->cmd_hdr[i]) dma_free_coherent(dev, s, hisi_hba->cmd_hdr[i], hisi_hba->cmd_hdr_dma[i]); s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; if (hisi_hba->complete_hdr[i]) dma_free_coherent(dev, s, hisi_hba->complete_hdr[i], hisi_hba->complete_hdr_dma[i]); } dma_pool_destroy(hisi_hba->status_buffer_pool); dma_pool_destroy(hisi_hba->command_table_pool); dma_pool_destroy(hisi_hba->sge_page_pool); s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); if (hisi_hba->itct) dma_free_coherent(dev, s, hisi_hba->itct, hisi_hba->itct_dma); s = max_command_entries * sizeof(struct hisi_sas_iost); if (hisi_hba->iost) dma_free_coherent(dev, s, hisi_hba->iost, hisi_hba->iost_dma); s = max_command_entries * sizeof(struct hisi_sas_breakpoint); if (hisi_hba->breakpoint) dma_free_coherent(dev, s, hisi_hba->breakpoint, hisi_hba->breakpoint_dma); s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; if (hisi_hba->initial_fis) dma_free_coherent(dev, s, hisi_hba->initial_fis, hisi_hba->initial_fis_dma); s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; if (hisi_hba->sata_breakpoint) dma_free_coherent(dev, s, hisi_hba->sata_breakpoint, hisi_hba->sata_breakpoint_dma); if (hisi_hba->wq) destroy_workqueue(hisi_hba->wq); } static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, const struct hisi_sas_hw *hw) { struct resource *res; struct Scsi_Host *shost; struct hisi_hba *hisi_hba; struct device *dev = &pdev->dev; struct device_node *np = pdev->dev.of_node; shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba)); if (!shost) goto err_out; hisi_hba = shost_priv(shost); hisi_hba->hw = hw; hisi_hba->pdev = pdev; hisi_hba->shost = shost; SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; init_timer(&hisi_hba->timer); if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, SAS_ADDR_SIZE)) goto err_out; if (np) { hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, "hisilicon,sas-syscon"); if (IS_ERR(hisi_hba->ctrl)) goto err_out; if (device_property_read_u32(dev, "ctrl-reset-reg", &hisi_hba->ctrl_reset_reg)) goto err_out; if (device_property_read_u32(dev, "ctrl-reset-sts-reg", &hisi_hba->ctrl_reset_sts_reg)) goto err_out; if (device_property_read_u32(dev, "ctrl-clock-ena-reg", &hisi_hba->ctrl_clock_ena_reg)) goto err_out; } if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) goto err_out; if (device_property_read_u32(dev, "queue-count", &hisi_hba->queue_count)) goto err_out; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hisi_hba->regs = devm_ioremap_resource(dev, res); if (IS_ERR(hisi_hba->regs)) goto err_out; if (hisi_sas_alloc(hisi_hba, shost)) { hisi_sas_free(hisi_hba); goto err_out; } return shost; err_out: dev_err(dev, "shost alloc failed\n"); return NULL; } static void hisi_sas_init_add(struct hisi_hba *hisi_hba) { int i; for (i = 0; i < hisi_hba->n_phy; i++) memcpy(&hisi_hba->phy[i].dev_sas_addr, hisi_hba->sas_addr, SAS_ADDR_SIZE); } int hisi_sas_probe(struct platform_device *pdev, const struct hisi_sas_hw *hw) { struct Scsi_Host *shost; struct hisi_hba *hisi_hba; struct device *dev = &pdev->dev; struct asd_sas_phy **arr_phy; struct asd_sas_port **arr_port; struct sas_ha_struct *sha; int rc, phy_nr, port_nr, i; shost = hisi_sas_shost_alloc(pdev, hw); if (!shost) { rc = -ENOMEM; goto err_out_ha; } sha = SHOST_TO_SAS_HA(shost); hisi_hba = shost_priv(shost); platform_set_drvdata(pdev, sha); if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) && dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) { dev_err(dev, "No usable DMA addressing method\n"); rc = -EIO; goto err_out_ha; } phy_nr = port_nr = hisi_hba->n_phy; arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); if (!arr_phy || !arr_port) return -ENOMEM; sha->sas_phy = arr_phy; sha->sas_port = arr_port; sha->core.shost = shost; sha->lldd_ha = hisi_hba; shost->transportt = hisi_sas_stt; shost->max_id = HISI_SAS_MAX_DEVICES; shost->max_lun = ~0; shost->max_channel = 1; shost->max_cmd_len = 16; shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT); shost->can_queue = hisi_hba->hw->max_command_entries; shost->cmd_per_lun = hisi_hba->hw->max_command_entries; sha->sas_ha_name = DRV_NAME; sha->dev = &hisi_hba->pdev->dev; sha->lldd_module = THIS_MODULE; sha->sas_addr = &hisi_hba->sas_addr[0]; sha->num_phys = hisi_hba->n_phy; sha->core.shost = hisi_hba->shost; for (i = 0; i < hisi_hba->n_phy; i++) { sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; sha->sas_port[i] = &hisi_hba->port[i].sas_port; } hisi_sas_init_add(hisi_hba); rc = hisi_hba->hw->hw_init(hisi_hba); if (rc) goto err_out_ha; rc = scsi_add_host(shost, &pdev->dev); if (rc) goto err_out_ha; rc = sas_register_ha(sha); if (rc) goto err_out_register_ha; scsi_scan_host(shost); return 0; err_out_register_ha: scsi_remove_host(shost); err_out_ha: kfree(shost); return rc; } EXPORT_SYMBOL_GPL(hisi_sas_probe); int hisi_sas_remove(struct platform_device *pdev) { struct sas_ha_struct *sha = platform_get_drvdata(pdev); struct hisi_hba *hisi_hba = sha->lldd_ha; scsi_remove_host(sha->core.shost); sas_unregister_ha(sha); sas_remove_host(sha->core.shost); hisi_sas_free(hisi_hba); return 0; } EXPORT_SYMBOL_GPL(hisi_sas_remove); static __init int hisi_sas_init(void) { pr_info("hisi_sas: driver version %s\n", DRV_VERSION); hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); if (!hisi_sas_stt) return -ENOMEM; return 0; } static __exit void hisi_sas_exit(void) { sas_release_transport(hisi_sas_stt); } module_init(hisi_sas_init); module_exit(hisi_sas_exit); MODULE_VERSION(DRV_VERSION); MODULE_LICENSE("GPL"); MODULE_AUTHOR("John Garry "); MODULE_DESCRIPTION("HISILICON SAS controller driver"); MODULE_ALIAS("platform:" DRV_NAME);