// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2021, MediaTek Inc. * Copyright (c) 2021-2022, Intel Corporation. * * Authors: * Haijun Liu * Eliot Lee * Moises Veleta * Ricardo Martinez * * Contributors: * Amir Hanania * Chiranjeevi Rapolu * Sreehari Kancharla */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "t7xx_cldma.h" #include "t7xx_hif_cldma.h" #include "t7xx_mhccif.h" #include "t7xx_modem_ops.h" #include "t7xx_netdev.h" #include "t7xx_pci.h" #include "t7xx_pcie_mac.h" #include "t7xx_port.h" #include "t7xx_port_proxy.h" #include "t7xx_reg.h" #include "t7xx_state_monitor.h" #define RT_ID_MD_PORT_ENUM 0 #define RT_ID_AP_PORT_ENUM 1 /* Modem feature query identification code - "ICCC" */ #define MD_FEATURE_QUERY_ID 0x49434343 #define FEATURE_VER GENMASK(7, 4) #define FEATURE_MSK GENMASK(3, 0) #define RGU_RESET_DELAY_MS 10 #define PORT_RESET_DELAY_MS 2000 #define FASTBOOT_RESET_DELAY_MS 2000 #define EX_HS_TIMEOUT_MS 5000 #define EX_HS_POLL_DELAY_MS 10 enum mtk_feature_support_type { MTK_FEATURE_DOES_NOT_EXIST, MTK_FEATURE_NOT_SUPPORTED, MTK_FEATURE_MUST_BE_SUPPORTED, }; static unsigned int t7xx_get_interrupt_status(struct t7xx_pci_dev *t7xx_dev) { return t7xx_mhccif_read_sw_int_sts(t7xx_dev) & D2H_SW_INT_MASK; } /** * t7xx_pci_mhccif_isr() - Process MHCCIF interrupts. * @t7xx_dev: MTK device. * * Check the interrupt status and queue commands accordingly. * * Returns: ** 0 - Success. ** -EINVAL - Failure to get FSM control. */ int t7xx_pci_mhccif_isr(struct t7xx_pci_dev *t7xx_dev) { struct t7xx_modem *md = t7xx_dev->md; struct t7xx_fsm_ctl *ctl; unsigned int int_sta; int ret = 0; u32 mask; ctl = md->fsm_ctl; if (!ctl) { dev_err_ratelimited(&t7xx_dev->pdev->dev, "MHCCIF interrupt received before initializing MD monitor\n"); return -EINVAL; } spin_lock_bh(&md->exp_lock); int_sta = t7xx_get_interrupt_status(t7xx_dev); md->exp_id |= int_sta; if (md->exp_id & D2H_INT_EXCEPTION_INIT) { if (ctl->md_state == MD_STATE_INVALID || ctl->md_state == MD_STATE_WAITING_FOR_HS1 || ctl->md_state == MD_STATE_WAITING_FOR_HS2 || ctl->md_state == MD_STATE_READY) { md->exp_id &= ~D2H_INT_EXCEPTION_INIT; ret = t7xx_fsm_recv_md_intr(ctl, MD_IRQ_CCIF_EX); } } else if (md->exp_id & D2H_INT_PORT_ENUM) { md->exp_id &= ~D2H_INT_PORT_ENUM; if (ctl->curr_state == FSM_STATE_INIT || ctl->curr_state == FSM_STATE_PRE_START || ctl->curr_state == FSM_STATE_STOPPED) ret = t7xx_fsm_recv_md_intr(ctl, MD_IRQ_PORT_ENUM); } else if (ctl->md_state == MD_STATE_WAITING_FOR_HS1) { mask = t7xx_mhccif_mask_get(t7xx_dev); if ((md->exp_id & D2H_INT_ASYNC_MD_HK) && !(mask & D2H_INT_ASYNC_MD_HK)) { md->exp_id &= ~D2H_INT_ASYNC_MD_HK; queue_work(md->handshake_wq, &md->handshake_work); } } spin_unlock_bh(&md->exp_lock); return ret; } static void t7xx_clr_device_irq_via_pcie(struct t7xx_pci_dev *t7xx_dev) { struct t7xx_addr_base *pbase_addr = &t7xx_dev->base_addr; void __iomem *reset_pcie_reg; u32 val; reset_pcie_reg = pbase_addr->pcie_ext_reg_base + TOPRGU_CH_PCIE_IRQ_STA - pbase_addr->pcie_dev_reg_trsl_addr; val = ioread32(reset_pcie_reg); iowrite32(val, reset_pcie_reg); } void t7xx_clear_rgu_irq(struct t7xx_pci_dev *t7xx_dev) { /* Clear L2 */ t7xx_clr_device_irq_via_pcie(t7xx_dev); /* Clear L1 */ t7xx_pcie_mac_clear_int_status(t7xx_dev, SAP_RGU_INT); } static int t7xx_acpi_reset(struct t7xx_pci_dev *t7xx_dev, char *fn_name) { #ifdef CONFIG_ACPI struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; struct device *dev = &t7xx_dev->pdev->dev; acpi_status acpi_ret; acpi_handle handle; handle = ACPI_HANDLE(dev); if (!handle) { dev_err(dev, "ACPI handle not found\n"); return -EFAULT; } if (!acpi_has_method(handle, fn_name)) { dev_err(dev, "%s method not found\n", fn_name); return -EFAULT; } acpi_ret = acpi_evaluate_object(handle, fn_name, NULL, &buffer); if (ACPI_FAILURE(acpi_ret)) { dev_err(dev, "%s method fail: %s\n", fn_name, acpi_format_exception(acpi_ret)); return -EFAULT; } kfree(buffer.pointer); #else struct device *dev = &t7xx_dev->pdev->dev; int ret; ret = pci_reset_function(t7xx_dev->pdev); if (ret) { dev_err(dev, "Failed to reset device, error:%d\n", ret); return ret; } #endif return 0; } static void t7xx_host_event_notify(struct t7xx_pci_dev *t7xx_dev, unsigned int event_id) { u32 value; value = ioread32(IREG_BASE(t7xx_dev) + T7XX_PCIE_MISC_DEV_STATUS); value &= ~HOST_EVENT_MASK; value |= FIELD_PREP(HOST_EVENT_MASK, event_id); iowrite32(value, IREG_BASE(t7xx_dev) + T7XX_PCIE_MISC_DEV_STATUS); } int t7xx_reset_device(struct t7xx_pci_dev *t7xx_dev, enum reset_type type) { int ret = 0; pci_save_state(t7xx_dev->pdev); t7xx_pci_reprobe_early(t7xx_dev); t7xx_mode_update(t7xx_dev, T7XX_RESET); if (type == FLDR) { ret = t7xx_acpi_reset(t7xx_dev, "_RST"); } else if (type == PLDR) { ret = t7xx_acpi_reset(t7xx_dev, "MRST._RST"); } else if (type == FASTBOOT) { t7xx_host_event_notify(t7xx_dev, FASTBOOT_DL_NOTIFY); t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DEVICE_RESET); msleep(FASTBOOT_RESET_DELAY_MS); } pci_restore_state(t7xx_dev->pdev); if (ret) return ret; return t7xx_pci_reprobe(t7xx_dev, true); } static void t7xx_reset_device_via_pmic(struct t7xx_pci_dev *t7xx_dev) { u32 val; val = ioread32(IREG_BASE(t7xx_dev) + T7XX_PCIE_MISC_DEV_STATUS); if (val & MISC_RESET_TYPE_PLDR) t7xx_reset_device(t7xx_dev, PLDR); else if (val & MISC_RESET_TYPE_FLDR) t7xx_reset_device(t7xx_dev, FLDR); } static irqreturn_t t7xx_rgu_isr_thread(int irq, void *data) { struct t7xx_pci_dev *t7xx_dev = data; msleep(RGU_RESET_DELAY_MS); t7xx_reset_device_via_pmic(t7xx_dev); return IRQ_HANDLED; } static irqreturn_t t7xx_rgu_isr_handler(int irq, void *data) { struct t7xx_pci_dev *t7xx_dev = data; struct t7xx_modem *modem; t7xx_clear_rgu_irq(t7xx_dev); if (!t7xx_dev->rgu_pci_irq_en) return IRQ_HANDLED; modem = t7xx_dev->md; modem->rgu_irq_asserted = true; t7xx_pcie_mac_clear_int(t7xx_dev, SAP_RGU_INT); return IRQ_WAKE_THREAD; } static void t7xx_pcie_register_rgu_isr(struct t7xx_pci_dev *t7xx_dev) { /* Registers RGU callback ISR with PCIe driver */ t7xx_pcie_mac_clear_int(t7xx_dev, SAP_RGU_INT); t7xx_pcie_mac_clear_int_status(t7xx_dev, SAP_RGU_INT); t7xx_dev->intr_handler[SAP_RGU_INT] = t7xx_rgu_isr_handler; t7xx_dev->intr_thread[SAP_RGU_INT] = t7xx_rgu_isr_thread; t7xx_dev->callback_param[SAP_RGU_INT] = t7xx_dev; t7xx_pcie_mac_set_int(t7xx_dev, SAP_RGU_INT); } /** * t7xx_cldma_exception() - CLDMA exception handler. * @md_ctrl: modem control struct. * @stage: exception stage. * * Part of the modem exception recovery. * Stages are one after the other as describe below: * HIF_EX_INIT: Disable and clear TXQ. * HIF_EX_CLEARQ_DONE: Disable RX, flush TX/RX workqueues and clear RX. * HIF_EX_ALLQ_RESET: HW is back in safe mode for re-initialization and restart. */ /* Modem Exception Handshake Flow * * Modem HW Exception interrupt received * (MD_IRQ_CCIF_EX) * | * +---------v--------+ * | HIF_EX_INIT | : Disable and clear TXQ * +------------------+ * | * +---------v--------+ * | HIF_EX_INIT_DONE | : Wait for the init to be done * +------------------+ * | * +---------v--------+ * |HIF_EX_CLEARQ_DONE| : Disable and clear RXQ * +------------------+ : Flush TX/RX workqueues * | * +---------v--------+ * |HIF_EX_ALLQ_RESET | : Restart HW and CLDMA * +------------------+ */ static void t7xx_cldma_exception(struct cldma_ctrl *md_ctrl, enum hif_ex_stage stage) { switch (stage) { case HIF_EX_INIT: t7xx_cldma_stop_all_qs(md_ctrl, MTK_TX); t7xx_cldma_clear_all_qs(md_ctrl, MTK_TX); break; case HIF_EX_CLEARQ_DONE: /* We do not want to get CLDMA IRQ when MD is * resetting CLDMA after it got clearq_ack. */ t7xx_cldma_stop_all_qs(md_ctrl, MTK_RX); t7xx_cldma_stop(md_ctrl); if (md_ctrl->hif_id == CLDMA_ID_MD) t7xx_cldma_hw_reset(md_ctrl->t7xx_dev->base_addr.infracfg_ao_base); t7xx_cldma_clear_all_qs(md_ctrl, MTK_RX); break; case HIF_EX_ALLQ_RESET: t7xx_cldma_hw_init(&md_ctrl->hw_info); t7xx_cldma_start(md_ctrl); break; default: break; } } static void t7xx_md_exception(struct t7xx_modem *md, enum hif_ex_stage stage) { struct t7xx_pci_dev *t7xx_dev = md->t7xx_dev; if (stage == HIF_EX_CLEARQ_DONE) { /* Give DHL time to flush data */ msleep(PORT_RESET_DELAY_MS); t7xx_port_proxy_reset(md->port_prox); } t7xx_cldma_exception(md->md_ctrl[CLDMA_ID_MD], stage); t7xx_cldma_exception(md->md_ctrl[CLDMA_ID_AP], stage); if (stage == HIF_EX_INIT) t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_EXCEPTION_ACK); else if (stage == HIF_EX_CLEARQ_DONE) t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_EXCEPTION_CLEARQ_ACK); } static int t7xx_wait_hif_ex_hk_event(struct t7xx_modem *md, int event_id) { unsigned int waited_time_ms = 0; do { if (md->exp_id & event_id) return 0; waited_time_ms += EX_HS_POLL_DELAY_MS; msleep(EX_HS_POLL_DELAY_MS); } while (waited_time_ms < EX_HS_TIMEOUT_MS); return -EFAULT; } static void t7xx_md_sys_sw_init(struct t7xx_pci_dev *t7xx_dev) { /* Register the MHCCIF ISR for MD exception, port enum and * async handshake notifications. */ t7xx_mhccif_mask_set(t7xx_dev, D2H_SW_INT_MASK); t7xx_mhccif_mask_clr(t7xx_dev, D2H_INT_PORT_ENUM); /* Register RGU IRQ handler for sAP exception notification */ t7xx_dev->rgu_pci_irq_en = true; t7xx_pcie_register_rgu_isr(t7xx_dev); } struct feature_query { __le32 head_pattern; u8 feature_set[FEATURE_COUNT]; __le32 tail_pattern; }; static void t7xx_prepare_host_rt_data_query(struct t7xx_sys_info *core) { struct feature_query *ft_query; struct sk_buff *skb; skb = t7xx_ctrl_alloc_skb(sizeof(*ft_query)); if (!skb) return; ft_query = skb_put(skb, sizeof(*ft_query)); ft_query->head_pattern = cpu_to_le32(MD_FEATURE_QUERY_ID); memcpy(ft_query->feature_set, core->feature_set, FEATURE_COUNT); ft_query->tail_pattern = cpu_to_le32(MD_FEATURE_QUERY_ID); /* Send HS1 message to device */ t7xx_port_send_ctl_skb(core->ctl_port, skb, CTL_ID_HS1_MSG, 0); } static int t7xx_prepare_device_rt_data(struct t7xx_sys_info *core, struct device *dev, void *data) { struct feature_query *md_feature = data; struct mtk_runtime_feature *rt_feature; unsigned int i, rt_data_len = 0; struct sk_buff *skb; /* Parse MD runtime data query */ if (le32_to_cpu(md_feature->head_pattern) != MD_FEATURE_QUERY_ID || le32_to_cpu(md_feature->tail_pattern) != MD_FEATURE_QUERY_ID) { dev_err(dev, "Invalid feature pattern: head 0x%x, tail 0x%x\n", le32_to_cpu(md_feature->head_pattern), le32_to_cpu(md_feature->tail_pattern)); return -EINVAL; } for (i = 0; i < FEATURE_COUNT; i++) { if (FIELD_GET(FEATURE_MSK, md_feature->feature_set[i]) != MTK_FEATURE_MUST_BE_SUPPORTED) rt_data_len += sizeof(*rt_feature); } skb = t7xx_ctrl_alloc_skb(rt_data_len); if (!skb) return -ENOMEM; rt_feature = skb_put(skb, rt_data_len); memset(rt_feature, 0, rt_data_len); /* Fill runtime feature */ for (i = 0; i < FEATURE_COUNT; i++) { u8 md_feature_mask = FIELD_GET(FEATURE_MSK, md_feature->feature_set[i]); if (md_feature_mask == MTK_FEATURE_MUST_BE_SUPPORTED) continue; rt_feature->feature_id = i; if (md_feature_mask == MTK_FEATURE_DOES_NOT_EXIST) rt_feature->support_info = md_feature->feature_set[i]; rt_feature++; } /* Send HS3 message to device */ t7xx_port_send_ctl_skb(core->ctl_port, skb, CTL_ID_HS3_MSG, 0); return 0; } static int t7xx_parse_host_rt_data(struct t7xx_fsm_ctl *ctl, struct t7xx_sys_info *core, struct device *dev, void *data, int data_length) { enum mtk_feature_support_type ft_spt_st, ft_spt_cfg; struct mtk_runtime_feature *rt_feature; int i, offset; offset = sizeof(struct feature_query); for (i = 0; i < FEATURE_COUNT && offset < data_length; i++) { rt_feature = data + offset; offset += sizeof(*rt_feature) + le32_to_cpu(rt_feature->data_len); ft_spt_cfg = FIELD_GET(FEATURE_MSK, core->feature_set[i]); if (ft_spt_cfg != MTK_FEATURE_MUST_BE_SUPPORTED) continue; ft_spt_st = FIELD_GET(FEATURE_MSK, rt_feature->support_info); if (ft_spt_st != MTK_FEATURE_MUST_BE_SUPPORTED) return -EINVAL; if (i == RT_ID_MD_PORT_ENUM || i == RT_ID_AP_PORT_ENUM) t7xx_port_enum_msg_handler(ctl->md, rt_feature->data); } return 0; } static int t7xx_core_reset(struct t7xx_modem *md) { struct device *dev = &md->t7xx_dev->pdev->dev; struct t7xx_fsm_ctl *ctl = md->fsm_ctl; md->core_md.ready = false; if (!ctl) { dev_err(dev, "FSM is not initialized\n"); return -EINVAL; } if (md->core_md.handshake_ongoing) { int ret = t7xx_fsm_append_event(ctl, FSM_EVENT_MD_HS2_EXIT, NULL, 0); if (ret) return ret; } md->core_md.handshake_ongoing = false; return 0; } static void t7xx_core_hk_handler(struct t7xx_modem *md, struct t7xx_sys_info *core_info, struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id, enum t7xx_fsm_event_state err_detect) { struct t7xx_fsm_event *event = NULL, *event_next; struct device *dev = &md->t7xx_dev->pdev->dev; unsigned long flags; int ret; t7xx_prepare_host_rt_data_query(core_info); while (!kthread_should_stop()) { bool event_received = false; spin_lock_irqsave(&ctl->event_lock, flags); list_for_each_entry_safe(event, event_next, &ctl->event_queue, entry) { if (event->event_id == err_detect) { list_del(&event->entry); spin_unlock_irqrestore(&ctl->event_lock, flags); dev_err(dev, "Core handshake error event received\n"); goto err_free_event; } else if (event->event_id == event_id) { list_del(&event->entry); event_received = true; break; } } spin_unlock_irqrestore(&ctl->event_lock, flags); if (event_received) break; wait_event_interruptible(ctl->event_wq, !list_empty(&ctl->event_queue) || kthread_should_stop()); if (kthread_should_stop()) goto err_free_event; } if (!event || ctl->exp_flg) goto err_free_event; ret = t7xx_parse_host_rt_data(ctl, core_info, dev, event->data, event->length); if (ret) { dev_err(dev, "Host failure parsing runtime data: %d\n", ret); goto err_free_event; } if (ctl->exp_flg) goto err_free_event; ret = t7xx_prepare_device_rt_data(core_info, dev, event->data); if (ret) { dev_err(dev, "Device failure parsing runtime data: %d", ret); goto err_free_event; } core_info->ready = true; core_info->handshake_ongoing = false; wake_up(&ctl->async_hk_wq); err_free_event: kfree(event); } static void t7xx_md_hk_wq(struct work_struct *work) { struct t7xx_modem *md = container_of(work, struct t7xx_modem, handshake_work); struct t7xx_fsm_ctl *ctl = md->fsm_ctl; /* Clear the HS2 EXIT event appended in core_reset() */ t7xx_fsm_clr_event(ctl, FSM_EVENT_MD_HS2_EXIT); t7xx_cldma_switch_cfg(md->md_ctrl[CLDMA_ID_MD], CLDMA_SHARED_Q_CFG); t7xx_cldma_start(md->md_ctrl[CLDMA_ID_MD]); t7xx_fsm_broadcast_state(ctl, MD_STATE_WAITING_FOR_HS2); md->core_md.handshake_ongoing = true; t7xx_core_hk_handler(md, &md->core_md, ctl, FSM_EVENT_MD_HS2, FSM_EVENT_MD_HS2_EXIT); } static void t7xx_ap_hk_wq(struct work_struct *work) { struct t7xx_modem *md = container_of(work, struct t7xx_modem, ap_handshake_work); struct t7xx_fsm_ctl *ctl = md->fsm_ctl; /* Clear the HS2 EXIT event appended in t7xx_core_reset(). */ t7xx_fsm_clr_event(ctl, FSM_EVENT_AP_HS2_EXIT); t7xx_cldma_stop(md->md_ctrl[CLDMA_ID_AP]); t7xx_cldma_switch_cfg(md->md_ctrl[CLDMA_ID_AP], CLDMA_SHARED_Q_CFG); t7xx_cldma_start(md->md_ctrl[CLDMA_ID_AP]); md->core_ap.handshake_ongoing = true; t7xx_core_hk_handler(md, &md->core_ap, ctl, FSM_EVENT_AP_HS2, FSM_EVENT_AP_HS2_EXIT); } void t7xx_md_event_notify(struct t7xx_modem *md, enum md_event_id evt_id) { struct t7xx_fsm_ctl *ctl = md->fsm_ctl; unsigned int int_sta; unsigned long flags; switch (evt_id) { case FSM_PRE_START: t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_PORT_ENUM | D2H_INT_ASYNC_MD_HK | D2H_INT_ASYNC_AP_HK); break; case FSM_START: t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_PORT_ENUM); spin_lock_irqsave(&md->exp_lock, flags); int_sta = t7xx_get_interrupt_status(md->t7xx_dev); md->exp_id |= int_sta; if (md->exp_id & D2H_INT_EXCEPTION_INIT) { ctl->exp_flg = true; md->exp_id &= ~D2H_INT_EXCEPTION_INIT; md->exp_id &= ~D2H_INT_ASYNC_MD_HK; md->exp_id &= ~D2H_INT_ASYNC_AP_HK; } else if (ctl->exp_flg) { md->exp_id &= ~D2H_INT_ASYNC_MD_HK; md->exp_id &= ~D2H_INT_ASYNC_AP_HK; } else { void __iomem *mhccif_base = md->t7xx_dev->base_addr.mhccif_rc_base; if (md->exp_id & D2H_INT_ASYNC_MD_HK) { queue_work(md->handshake_wq, &md->handshake_work); md->exp_id &= ~D2H_INT_ASYNC_MD_HK; iowrite32(D2H_INT_ASYNC_MD_HK, mhccif_base + REG_EP2RC_SW_INT_ACK); t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_MD_HK); } if (md->exp_id & D2H_INT_ASYNC_AP_HK) { queue_work(md->handshake_wq, &md->ap_handshake_work); md->exp_id &= ~D2H_INT_ASYNC_AP_HK; iowrite32(D2H_INT_ASYNC_AP_HK, mhccif_base + REG_EP2RC_SW_INT_ACK); t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_AP_HK); } } spin_unlock_irqrestore(&md->exp_lock, flags); t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_EXCEPTION_INIT | D2H_INT_EXCEPTION_INIT_DONE | D2H_INT_EXCEPTION_CLEARQ_DONE | D2H_INT_EXCEPTION_ALLQ_RESET); break; case FSM_READY: t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_MD_HK); t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_AP_HK); break; default: break; } } void t7xx_md_exception_handshake(struct t7xx_modem *md) { struct device *dev = &md->t7xx_dev->pdev->dev; int ret; t7xx_md_exception(md, HIF_EX_INIT); ret = t7xx_wait_hif_ex_hk_event(md, D2H_INT_EXCEPTION_INIT_DONE); if (ret) dev_err(dev, "EX CCIF HS timeout, RCH 0x%lx\n", D2H_INT_EXCEPTION_INIT_DONE); t7xx_md_exception(md, HIF_EX_INIT_DONE); ret = t7xx_wait_hif_ex_hk_event(md, D2H_INT_EXCEPTION_CLEARQ_DONE); if (ret) dev_err(dev, "EX CCIF HS timeout, RCH 0x%lx\n", D2H_INT_EXCEPTION_CLEARQ_DONE); t7xx_md_exception(md, HIF_EX_CLEARQ_DONE); ret = t7xx_wait_hif_ex_hk_event(md, D2H_INT_EXCEPTION_ALLQ_RESET); if (ret) dev_err(dev, "EX CCIF HS timeout, RCH 0x%lx\n", D2H_INT_EXCEPTION_ALLQ_RESET); t7xx_md_exception(md, HIF_EX_ALLQ_RESET); } static struct t7xx_modem *t7xx_md_alloc(struct t7xx_pci_dev *t7xx_dev) { struct device *dev = &t7xx_dev->pdev->dev; struct t7xx_modem *md; md = devm_kzalloc(dev, sizeof(*md), GFP_KERNEL); if (!md) return NULL; md->t7xx_dev = t7xx_dev; t7xx_dev->md = md; spin_lock_init(&md->exp_lock); md->handshake_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_HIGHPRI, 0, "md_hk_wq"); if (!md->handshake_wq) return NULL; INIT_WORK(&md->handshake_work, t7xx_md_hk_wq); md->core_md.feature_set[RT_ID_MD_PORT_ENUM] &= ~FEATURE_MSK; md->core_md.feature_set[RT_ID_MD_PORT_ENUM] |= FIELD_PREP(FEATURE_MSK, MTK_FEATURE_MUST_BE_SUPPORTED); INIT_WORK(&md->ap_handshake_work, t7xx_ap_hk_wq); md->core_ap.feature_set[RT_ID_AP_PORT_ENUM] &= ~FEATURE_MSK; md->core_ap.feature_set[RT_ID_AP_PORT_ENUM] |= FIELD_PREP(FEATURE_MSK, MTK_FEATURE_MUST_BE_SUPPORTED); return md; } int t7xx_md_reset(struct t7xx_pci_dev *t7xx_dev) { struct t7xx_modem *md = t7xx_dev->md; md->md_init_finish = false; md->exp_id = 0; t7xx_fsm_reset(md); t7xx_cldma_reset(md->md_ctrl[CLDMA_ID_MD]); t7xx_cldma_reset(md->md_ctrl[CLDMA_ID_AP]); t7xx_port_proxy_reset(md->port_prox); md->md_init_finish = true; return t7xx_core_reset(md); } /** * t7xx_md_init() - Initialize modem. * @t7xx_dev: MTK device. * * Allocate and initialize MD control block, and initialize data path. * Register MHCCIF ISR and RGU ISR, and start the state machine. * * Return: ** 0 - Success. ** -ENOMEM - Allocation failure. */ int t7xx_md_init(struct t7xx_pci_dev *t7xx_dev) { struct t7xx_modem *md; int ret; md = t7xx_md_alloc(t7xx_dev); if (!md) return -ENOMEM; ret = t7xx_cldma_alloc(CLDMA_ID_MD, t7xx_dev); if (ret) goto err_destroy_hswq; ret = t7xx_cldma_alloc(CLDMA_ID_AP, t7xx_dev); if (ret) goto err_destroy_hswq; ret = t7xx_fsm_init(md); if (ret) goto err_destroy_hswq; ret = t7xx_ccmni_init(t7xx_dev); if (ret) goto err_uninit_fsm; ret = t7xx_cldma_init(md->md_ctrl[CLDMA_ID_MD]); if (ret) goto err_uninit_ccmni; ret = t7xx_cldma_init(md->md_ctrl[CLDMA_ID_AP]); if (ret) goto err_uninit_md_cldma; ret = t7xx_port_proxy_init(md); if (ret) goto err_uninit_ap_cldma; ret = t7xx_fsm_append_cmd(md->fsm_ctl, FSM_CMD_START, 0); if (ret) /* t7xx_fsm_uninit() flushes cmd queue */ goto err_uninit_proxy; t7xx_md_sys_sw_init(t7xx_dev); md->md_init_finish = true; return 0; err_uninit_proxy: t7xx_port_proxy_uninit(md->port_prox); err_uninit_ap_cldma: t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_AP]); err_uninit_md_cldma: t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_MD]); err_uninit_ccmni: t7xx_ccmni_exit(t7xx_dev); err_uninit_fsm: t7xx_fsm_uninit(md); err_destroy_hswq: destroy_workqueue(md->handshake_wq); dev_err(&t7xx_dev->pdev->dev, "Modem init failed\n"); return ret; } void t7xx_md_exit(struct t7xx_pci_dev *t7xx_dev) { enum t7xx_mode mode = READ_ONCE(t7xx_dev->mode); struct t7xx_modem *md = t7xx_dev->md; t7xx_pcie_mac_clear_int(t7xx_dev, SAP_RGU_INT); if (!md->md_init_finish) return; if (mode != T7XX_RESET && mode != T7XX_UNKNOWN) t7xx_fsm_append_cmd(md->fsm_ctl, FSM_CMD_PRE_STOP, FSM_CMD_FLAG_WAIT_FOR_COMPLETION); t7xx_port_proxy_uninit(md->port_prox); t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_AP]); t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_MD]); t7xx_ccmni_exit(t7xx_dev); t7xx_fsm_uninit(md); destroy_workqueue(md->handshake_wq); }