// SPDX-License-Identifier: BSD-3-Clause-Clear /* * Copyright (c) 2019-2021 The Linux Foundation. All rights reserved. * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved. */ #include #include #include #include "pci.h" #include "core.h" #include "hif.h" #include "mhi.h" #include "debug.h" #define ATH12K_PCI_BAR_NUM 0 #define ATH12K_PCI_DMA_MASK 32 #define ATH12K_PCI_IRQ_CE0_OFFSET 3 #define WINDOW_ENABLE_BIT 0x40000000 #define WINDOW_REG_ADDRESS 0x310c #define WINDOW_VALUE_MASK GENMASK(24, 19) #define WINDOW_START 0x80000 #define WINDOW_RANGE_MASK GENMASK(18, 0) #define WINDOW_STATIC_MASK GENMASK(31, 6) #define TCSR_SOC_HW_VERSION 0x1B00000 #define TCSR_SOC_HW_VERSION_MAJOR_MASK GENMASK(11, 8) #define TCSR_SOC_HW_VERSION_MINOR_MASK GENMASK(7, 4) /* BAR0 + 4k is always accessible, and no * need to force wakeup. * 4K - 32 = 0xFE0 */ #define ACCESS_ALWAYS_OFF 0xFE0 #define QCN9274_DEVICE_ID 0x1109 #define WCN7850_DEVICE_ID 0x1107 static const struct pci_device_id ath12k_pci_id_table[] = { { PCI_VDEVICE(QCOM, QCN9274_DEVICE_ID) }, { PCI_VDEVICE(QCOM, WCN7850_DEVICE_ID) }, {0} }; MODULE_DEVICE_TABLE(pci, ath12k_pci_id_table); /* TODO: revisit IRQ mapping for new SRNG's */ static const struct ath12k_msi_config ath12k_msi_config[] = { { .total_vectors = 16, .total_users = 3, .users = (struct ath12k_msi_user[]) { { .name = "MHI", .num_vectors = 3, .base_vector = 0 }, { .name = "CE", .num_vectors = 5, .base_vector = 3 }, { .name = "DP", .num_vectors = 8, .base_vector = 8 }, }, }, }; static const char *irq_name[ATH12K_IRQ_NUM_MAX] = { "bhi", "mhi-er0", "mhi-er1", "ce0", "ce1", "ce2", "ce3", "ce4", "ce5", "ce6", "ce7", "ce8", "ce9", "ce10", "ce11", "ce12", "ce13", "ce14", "ce15", "host2wbm-desc-feed", "host2reo-re-injection", "host2reo-command", "host2rxdma-monitor-ring3", "host2rxdma-monitor-ring2", "host2rxdma-monitor-ring1", "reo2ost-exception", "wbm2host-rx-release", "reo2host-status", "reo2host-destination-ring4", "reo2host-destination-ring3", "reo2host-destination-ring2", "reo2host-destination-ring1", "rxdma2host-monitor-destination-mac3", "rxdma2host-monitor-destination-mac2", "rxdma2host-monitor-destination-mac1", "ppdu-end-interrupts-mac3", "ppdu-end-interrupts-mac2", "ppdu-end-interrupts-mac1", "rxdma2host-monitor-status-ring-mac3", "rxdma2host-monitor-status-ring-mac2", "rxdma2host-monitor-status-ring-mac1", "host2rxdma-host-buf-ring-mac3", "host2rxdma-host-buf-ring-mac2", "host2rxdma-host-buf-ring-mac1", "rxdma2host-destination-ring-mac3", "rxdma2host-destination-ring-mac2", "rxdma2host-destination-ring-mac1", "host2tcl-input-ring4", "host2tcl-input-ring3", "host2tcl-input-ring2", "host2tcl-input-ring1", "wbm2host-tx-completions-ring4", "wbm2host-tx-completions-ring3", "wbm2host-tx-completions-ring2", "wbm2host-tx-completions-ring1", "tcl2host-status-ring", }; static int ath12k_pci_bus_wake_up(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); return mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev); } static void ath12k_pci_bus_release(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); mhi_device_put(ab_pci->mhi_ctrl->mhi_dev); } static const struct ath12k_pci_ops ath12k_pci_ops_qcn9274 = { .wakeup = NULL, .release = NULL, }; static const struct ath12k_pci_ops ath12k_pci_ops_wcn7850 = { .wakeup = ath12k_pci_bus_wake_up, .release = ath12k_pci_bus_release, }; static void ath12k_pci_select_window(struct ath12k_pci *ab_pci, u32 offset) { struct ath12k_base *ab = ab_pci->ab; u32 window = u32_get_bits(offset, WINDOW_VALUE_MASK); u32 static_window; lockdep_assert_held(&ab_pci->window_lock); /* Preserve the static window configuration and reset only dynamic window */ static_window = ab_pci->register_window & WINDOW_STATIC_MASK; window |= static_window; if (window != ab_pci->register_window) { iowrite32(WINDOW_ENABLE_BIT | window, ab->mem + WINDOW_REG_ADDRESS); ioread32(ab->mem + WINDOW_REG_ADDRESS); ab_pci->register_window = window; } } static void ath12k_pci_select_static_window(struct ath12k_pci *ab_pci) { u32 umac_window = u32_get_bits(HAL_SEQ_WCSS_UMAC_OFFSET, WINDOW_VALUE_MASK); u32 ce_window = u32_get_bits(HAL_CE_WFSS_CE_REG_BASE, WINDOW_VALUE_MASK); u32 window; window = (umac_window << 12) | (ce_window << 6); spin_lock_bh(&ab_pci->window_lock); ab_pci->register_window = window; spin_unlock_bh(&ab_pci->window_lock); iowrite32(WINDOW_ENABLE_BIT | window, ab_pci->ab->mem + WINDOW_REG_ADDRESS); } static u32 ath12k_pci_get_window_start(struct ath12k_base *ab, u32 offset) { u32 window_start; /* If offset lies within DP register range, use 3rd window */ if ((offset ^ HAL_SEQ_WCSS_UMAC_OFFSET) < WINDOW_RANGE_MASK) window_start = 3 * WINDOW_START; /* If offset lies within CE register range, use 2nd window */ else if ((offset ^ HAL_CE_WFSS_CE_REG_BASE) < WINDOW_RANGE_MASK) window_start = 2 * WINDOW_START; /* If offset lies within PCI_BAR_WINDOW0_BASE and within PCI_SOC_PCI_REG_BASE * use 0th window */ else if (((offset ^ PCI_BAR_WINDOW0_BASE) < WINDOW_RANGE_MASK) && !((offset ^ PCI_SOC_PCI_REG_BASE) < PCI_SOC_RANGE_MASK)) window_start = 0; else window_start = WINDOW_START; return window_start; } static void ath12k_pci_soc_global_reset(struct ath12k_base *ab) { u32 val, delay; val = ath12k_pci_read32(ab, PCIE_SOC_GLOBAL_RESET); val |= PCIE_SOC_GLOBAL_RESET_V; ath12k_pci_write32(ab, PCIE_SOC_GLOBAL_RESET, val); /* TODO: exact time to sleep is uncertain */ delay = 10; mdelay(delay); /* Need to toggle V bit back otherwise stuck in reset status */ val &= ~PCIE_SOC_GLOBAL_RESET_V; ath12k_pci_write32(ab, PCIE_SOC_GLOBAL_RESET, val); mdelay(delay); val = ath12k_pci_read32(ab, PCIE_SOC_GLOBAL_RESET); if (val == 0xffffffff) ath12k_warn(ab, "link down error during global reset\n"); } static void ath12k_pci_clear_dbg_registers(struct ath12k_base *ab) { u32 val; /* read cookie */ val = ath12k_pci_read32(ab, PCIE_Q6_COOKIE_ADDR); ath12k_dbg(ab, ATH12K_DBG_PCI, "cookie:0x%x\n", val); val = ath12k_pci_read32(ab, WLAON_WARM_SW_ENTRY); ath12k_dbg(ab, ATH12K_DBG_PCI, "WLAON_WARM_SW_ENTRY 0x%x\n", val); /* TODO: exact time to sleep is uncertain */ mdelay(10); /* write 0 to WLAON_WARM_SW_ENTRY to prevent Q6 from * continuing warm path and entering dead loop. */ ath12k_pci_write32(ab, WLAON_WARM_SW_ENTRY, 0); mdelay(10); val = ath12k_pci_read32(ab, WLAON_WARM_SW_ENTRY); ath12k_dbg(ab, ATH12K_DBG_PCI, "WLAON_WARM_SW_ENTRY 0x%x\n", val); /* A read clear register. clear the register to prevent * Q6 from entering wrong code path. */ val = ath12k_pci_read32(ab, WLAON_SOC_RESET_CAUSE_REG); ath12k_dbg(ab, ATH12K_DBG_PCI, "soc reset cause:%d\n", val); } static void ath12k_pci_enable_ltssm(struct ath12k_base *ab) { u32 val; int i; val = ath12k_pci_read32(ab, PCIE_PCIE_PARF_LTSSM); /* PCIE link seems very unstable after the Hot Reset*/ for (i = 0; val != PARM_LTSSM_VALUE && i < 5; i++) { if (val == 0xffffffff) mdelay(5); ath12k_pci_write32(ab, PCIE_PCIE_PARF_LTSSM, PARM_LTSSM_VALUE); val = ath12k_pci_read32(ab, PCIE_PCIE_PARF_LTSSM); } ath12k_dbg(ab, ATH12K_DBG_PCI, "pci ltssm 0x%x\n", val); val = ath12k_pci_read32(ab, GCC_GCC_PCIE_HOT_RST); val |= GCC_GCC_PCIE_HOT_RST_VAL; ath12k_pci_write32(ab, GCC_GCC_PCIE_HOT_RST, val); val = ath12k_pci_read32(ab, GCC_GCC_PCIE_HOT_RST); ath12k_dbg(ab, ATH12K_DBG_PCI, "pci pcie_hot_rst 0x%x\n", val); mdelay(5); } static void ath12k_pci_clear_all_intrs(struct ath12k_base *ab) { /* This is a WAR for PCIE Hotreset. * When target receive Hotreset, but will set the interrupt. * So when download SBL again, SBL will open Interrupt and * receive it, and crash immediately. */ ath12k_pci_write32(ab, PCIE_PCIE_INT_ALL_CLEAR, PCIE_INT_CLEAR_ALL); } static void ath12k_pci_set_wlaon_pwr_ctrl(struct ath12k_base *ab) { u32 val; val = ath12k_pci_read32(ab, WLAON_QFPROM_PWR_CTRL_REG); val &= ~QFPROM_PWR_CTRL_VDD4BLOW_MASK; ath12k_pci_write32(ab, WLAON_QFPROM_PWR_CTRL_REG, val); } static void ath12k_pci_force_wake(struct ath12k_base *ab) { ath12k_pci_write32(ab, PCIE_SOC_WAKE_PCIE_LOCAL_REG, 1); mdelay(5); } static void ath12k_pci_sw_reset(struct ath12k_base *ab, bool power_on) { if (power_on) { ath12k_pci_enable_ltssm(ab); ath12k_pci_clear_all_intrs(ab); ath12k_pci_set_wlaon_pwr_ctrl(ab); } ath12k_mhi_clear_vector(ab); ath12k_pci_clear_dbg_registers(ab); ath12k_pci_soc_global_reset(ab); ath12k_mhi_set_mhictrl_reset(ab); } static void ath12k_pci_free_ext_irq(struct ath12k_base *ab) { int i, j; for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath12k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; for (j = 0; j < irq_grp->num_irq; j++) free_irq(ab->irq_num[irq_grp->irqs[j]], irq_grp); netif_napi_del(&irq_grp->napi); } } static void ath12k_pci_free_irq(struct ath12k_base *ab) { int i, irq_idx; for (i = 0; i < ab->hw_params->ce_count; i++) { if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; irq_idx = ATH12K_PCI_IRQ_CE0_OFFSET + i; free_irq(ab->irq_num[irq_idx], &ab->ce.ce_pipe[i]); } ath12k_pci_free_ext_irq(ab); } static void ath12k_pci_ce_irq_enable(struct ath12k_base *ab, u16 ce_id) { u32 irq_idx; irq_idx = ATH12K_PCI_IRQ_CE0_OFFSET + ce_id; enable_irq(ab->irq_num[irq_idx]); } static void ath12k_pci_ce_irq_disable(struct ath12k_base *ab, u16 ce_id) { u32 irq_idx; irq_idx = ATH12K_PCI_IRQ_CE0_OFFSET + ce_id; disable_irq_nosync(ab->irq_num[irq_idx]); } static void ath12k_pci_ce_irqs_disable(struct ath12k_base *ab) { int i; for (i = 0; i < ab->hw_params->ce_count; i++) { if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; ath12k_pci_ce_irq_disable(ab, i); } } static void ath12k_pci_sync_ce_irqs(struct ath12k_base *ab) { int i; int irq_idx; for (i = 0; i < ab->hw_params->ce_count; i++) { if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; irq_idx = ATH12K_PCI_IRQ_CE0_OFFSET + i; synchronize_irq(ab->irq_num[irq_idx]); } } static void ath12k_pci_ce_tasklet(struct tasklet_struct *t) { struct ath12k_ce_pipe *ce_pipe = from_tasklet(ce_pipe, t, intr_tq); ath12k_ce_per_engine_service(ce_pipe->ab, ce_pipe->pipe_num); ath12k_pci_ce_irq_enable(ce_pipe->ab, ce_pipe->pipe_num); } static irqreturn_t ath12k_pci_ce_interrupt_handler(int irq, void *arg) { struct ath12k_ce_pipe *ce_pipe = arg; /* last interrupt received for this CE */ ce_pipe->timestamp = jiffies; ath12k_pci_ce_irq_disable(ce_pipe->ab, ce_pipe->pipe_num); tasklet_schedule(&ce_pipe->intr_tq); return IRQ_HANDLED; } static void ath12k_pci_ext_grp_disable(struct ath12k_ext_irq_grp *irq_grp) { int i; for (i = 0; i < irq_grp->num_irq; i++) disable_irq_nosync(irq_grp->ab->irq_num[irq_grp->irqs[i]]); } static void __ath12k_pci_ext_irq_disable(struct ath12k_base *sc) { int i; for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath12k_ext_irq_grp *irq_grp = &sc->ext_irq_grp[i]; ath12k_pci_ext_grp_disable(irq_grp); napi_synchronize(&irq_grp->napi); napi_disable(&irq_grp->napi); } } static void ath12k_pci_ext_grp_enable(struct ath12k_ext_irq_grp *irq_grp) { int i; for (i = 0; i < irq_grp->num_irq; i++) enable_irq(irq_grp->ab->irq_num[irq_grp->irqs[i]]); } static void ath12k_pci_sync_ext_irqs(struct ath12k_base *ab) { int i, j, irq_idx; for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath12k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; for (j = 0; j < irq_grp->num_irq; j++) { irq_idx = irq_grp->irqs[j]; synchronize_irq(ab->irq_num[irq_idx]); } } } static int ath12k_pci_ext_grp_napi_poll(struct napi_struct *napi, int budget) { struct ath12k_ext_irq_grp *irq_grp = container_of(napi, struct ath12k_ext_irq_grp, napi); struct ath12k_base *ab = irq_grp->ab; int work_done; work_done = ath12k_dp_service_srng(ab, irq_grp, budget); if (work_done < budget) { napi_complete_done(napi, work_done); ath12k_pci_ext_grp_enable(irq_grp); } if (work_done > budget) work_done = budget; return work_done; } static irqreturn_t ath12k_pci_ext_interrupt_handler(int irq, void *arg) { struct ath12k_ext_irq_grp *irq_grp = arg; ath12k_dbg(irq_grp->ab, ATH12K_DBG_PCI, "ext irq:%d\n", irq); /* last interrupt received for this group */ irq_grp->timestamp = jiffies; ath12k_pci_ext_grp_disable(irq_grp); napi_schedule(&irq_grp->napi); return IRQ_HANDLED; } static int ath12k_pci_ext_irq_config(struct ath12k_base *ab) { int i, j, ret, num_vectors = 0; u32 user_base_data = 0, base_vector = 0, base_idx; base_idx = ATH12K_PCI_IRQ_CE0_OFFSET + CE_COUNT_MAX; ret = ath12k_pci_get_user_msi_assignment(ab, "DP", &num_vectors, &user_base_data, &base_vector); if (ret < 0) return ret; for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath12k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; u32 num_irq = 0; irq_grp->ab = ab; irq_grp->grp_id = i; init_dummy_netdev(&irq_grp->napi_ndev); netif_napi_add(&irq_grp->napi_ndev, &irq_grp->napi, ath12k_pci_ext_grp_napi_poll); if (ab->hw_params->ring_mask->tx[i] || ab->hw_params->ring_mask->rx[i] || ab->hw_params->ring_mask->rx_err[i] || ab->hw_params->ring_mask->rx_wbm_rel[i] || ab->hw_params->ring_mask->reo_status[i] || ab->hw_params->ring_mask->host2rxdma[i] || ab->hw_params->ring_mask->rx_mon_dest[i]) { num_irq = 1; } irq_grp->num_irq = num_irq; irq_grp->irqs[0] = base_idx + i; for (j = 0; j < irq_grp->num_irq; j++) { int irq_idx = irq_grp->irqs[j]; int vector = (i % num_vectors) + base_vector; int irq = ath12k_pci_get_msi_irq(ab->dev, vector); ab->irq_num[irq_idx] = irq; ath12k_dbg(ab, ATH12K_DBG_PCI, "irq:%d group:%d\n", irq, i); irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY); ret = request_irq(irq, ath12k_pci_ext_interrupt_handler, IRQF_SHARED, "DP_EXT_IRQ", irq_grp); if (ret) { ath12k_err(ab, "failed request irq %d: %d\n", vector, ret); return ret; } disable_irq_nosync(ab->irq_num[irq_idx]); } } return 0; } static int ath12k_pci_config_irq(struct ath12k_base *ab) { struct ath12k_ce_pipe *ce_pipe; u32 msi_data_start; u32 msi_data_count, msi_data_idx; u32 msi_irq_start; unsigned int msi_data; int irq, i, ret, irq_idx; ret = ath12k_pci_get_user_msi_assignment(ab, "CE", &msi_data_count, &msi_data_start, &msi_irq_start); if (ret) return ret; /* Configure CE irqs */ for (i = 0, msi_data_idx = 0; i < ab->hw_params->ce_count; i++) { if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; msi_data = (msi_data_idx % msi_data_count) + msi_irq_start; irq = ath12k_pci_get_msi_irq(ab->dev, msi_data); ce_pipe = &ab->ce.ce_pipe[i]; irq_idx = ATH12K_PCI_IRQ_CE0_OFFSET + i; tasklet_setup(&ce_pipe->intr_tq, ath12k_pci_ce_tasklet); ret = request_irq(irq, ath12k_pci_ce_interrupt_handler, IRQF_SHARED, irq_name[irq_idx], ce_pipe); if (ret) { ath12k_err(ab, "failed to request irq %d: %d\n", irq_idx, ret); return ret; } ab->irq_num[irq_idx] = irq; msi_data_idx++; ath12k_pci_ce_irq_disable(ab, i); } ret = ath12k_pci_ext_irq_config(ab); if (ret) return ret; return 0; } static void ath12k_pci_init_qmi_ce_config(struct ath12k_base *ab) { struct ath12k_qmi_ce_cfg *cfg = &ab->qmi.ce_cfg; cfg->tgt_ce = ab->hw_params->target_ce_config; cfg->tgt_ce_len = ab->hw_params->target_ce_count; cfg->svc_to_ce_map = ab->hw_params->svc_to_ce_map; cfg->svc_to_ce_map_len = ab->hw_params->svc_to_ce_map_len; ab->qmi.service_ins_id = ab->hw_params->qmi_service_ins_id; } static void ath12k_pci_ce_irqs_enable(struct ath12k_base *ab) { int i; for (i = 0; i < ab->hw_params->ce_count; i++) { if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; ath12k_pci_ce_irq_enable(ab, i); } } static void ath12k_pci_msi_config(struct ath12k_pci *ab_pci, bool enable) { struct pci_dev *dev = ab_pci->pdev; u16 control; pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control); if (enable) control |= PCI_MSI_FLAGS_ENABLE; else control &= ~PCI_MSI_FLAGS_ENABLE; pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control); } static void ath12k_pci_msi_enable(struct ath12k_pci *ab_pci) { ath12k_pci_msi_config(ab_pci, true); } static void ath12k_pci_msi_disable(struct ath12k_pci *ab_pci) { ath12k_pci_msi_config(ab_pci, false); } static int ath12k_pci_msi_alloc(struct ath12k_pci *ab_pci) { struct ath12k_base *ab = ab_pci->ab; const struct ath12k_msi_config *msi_config = ab_pci->msi_config; struct msi_desc *msi_desc; int num_vectors; int ret; num_vectors = pci_alloc_irq_vectors(ab_pci->pdev, msi_config->total_vectors, msi_config->total_vectors, PCI_IRQ_MSI); if (num_vectors != msi_config->total_vectors) { ath12k_err(ab, "failed to get %d MSI vectors, only %d available", msi_config->total_vectors, num_vectors); if (num_vectors >= 0) return -EINVAL; else return num_vectors; } ath12k_pci_msi_disable(ab_pci); msi_desc = irq_get_msi_desc(ab_pci->pdev->irq); if (!msi_desc) { ath12k_err(ab, "msi_desc is NULL!\n"); ret = -EINVAL; goto free_msi_vector; } ab_pci->msi_ep_base_data = msi_desc->msg.data; if (msi_desc->pci.msi_attrib.is_64) set_bit(ATH12K_PCI_FLAG_IS_MSI_64, &ab_pci->flags); ath12k_dbg(ab, ATH12K_DBG_PCI, "msi base data is %d\n", ab_pci->msi_ep_base_data); return 0; free_msi_vector: pci_free_irq_vectors(ab_pci->pdev); return ret; } static void ath12k_pci_msi_free(struct ath12k_pci *ab_pci) { pci_free_irq_vectors(ab_pci->pdev); } static int ath12k_pci_claim(struct ath12k_pci *ab_pci, struct pci_dev *pdev) { struct ath12k_base *ab = ab_pci->ab; u16 device_id; int ret = 0; pci_read_config_word(pdev, PCI_DEVICE_ID, &device_id); if (device_id != ab_pci->dev_id) { ath12k_err(ab, "pci device id mismatch: 0x%x 0x%x\n", device_id, ab_pci->dev_id); ret = -EIO; goto out; } ret = pci_assign_resource(pdev, ATH12K_PCI_BAR_NUM); if (ret) { ath12k_err(ab, "failed to assign pci resource: %d\n", ret); goto out; } ret = pci_enable_device(pdev); if (ret) { ath12k_err(ab, "failed to enable pci device: %d\n", ret); goto out; } ret = pci_request_region(pdev, ATH12K_PCI_BAR_NUM, "ath12k_pci"); if (ret) { ath12k_err(ab, "failed to request pci region: %d\n", ret); goto disable_device; } ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(ATH12K_PCI_DMA_MASK)); if (ret) { ath12k_err(ab, "failed to set pci dma mask to %d: %d\n", ATH12K_PCI_DMA_MASK, ret); goto release_region; } pci_set_master(pdev); ab->mem_len = pci_resource_len(pdev, ATH12K_PCI_BAR_NUM); ab->mem = pci_iomap(pdev, ATH12K_PCI_BAR_NUM, 0); if (!ab->mem) { ath12k_err(ab, "failed to map pci bar %d\n", ATH12K_PCI_BAR_NUM); ret = -EIO; goto release_region; } ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot pci_mem 0x%pK\n", ab->mem); return 0; release_region: pci_release_region(pdev, ATH12K_PCI_BAR_NUM); disable_device: pci_disable_device(pdev); out: return ret; } static void ath12k_pci_free_region(struct ath12k_pci *ab_pci) { struct ath12k_base *ab = ab_pci->ab; struct pci_dev *pci_dev = ab_pci->pdev; pci_iounmap(pci_dev, ab->mem); ab->mem = NULL; pci_release_region(pci_dev, ATH12K_PCI_BAR_NUM); if (pci_is_enabled(pci_dev)) pci_disable_device(pci_dev); } static void ath12k_pci_aspm_disable(struct ath12k_pci *ab_pci) { struct ath12k_base *ab = ab_pci->ab; pcie_capability_read_word(ab_pci->pdev, PCI_EXP_LNKCTL, &ab_pci->link_ctl); ath12k_dbg(ab, ATH12K_DBG_PCI, "pci link_ctl 0x%04x L0s %d L1 %d\n", ab_pci->link_ctl, u16_get_bits(ab_pci->link_ctl, PCI_EXP_LNKCTL_ASPM_L0S), u16_get_bits(ab_pci->link_ctl, PCI_EXP_LNKCTL_ASPM_L1)); /* disable L0s and L1 */ pcie_capability_write_word(ab_pci->pdev, PCI_EXP_LNKCTL, ab_pci->link_ctl & ~PCI_EXP_LNKCTL_ASPMC); set_bit(ATH12K_PCI_ASPM_RESTORE, &ab_pci->flags); } static void ath12k_pci_aspm_restore(struct ath12k_pci *ab_pci) { if (test_and_clear_bit(ATH12K_PCI_ASPM_RESTORE, &ab_pci->flags)) pcie_capability_write_word(ab_pci->pdev, PCI_EXP_LNKCTL, ab_pci->link_ctl); } static void ath12k_pci_kill_tasklets(struct ath12k_base *ab) { int i; for (i = 0; i < ab->hw_params->ce_count; i++) { struct ath12k_ce_pipe *ce_pipe = &ab->ce.ce_pipe[i]; if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; tasklet_kill(&ce_pipe->intr_tq); } } static void ath12k_pci_ce_irq_disable_sync(struct ath12k_base *ab) { ath12k_pci_ce_irqs_disable(ab); ath12k_pci_sync_ce_irqs(ab); ath12k_pci_kill_tasklets(ab); } int ath12k_pci_map_service_to_pipe(struct ath12k_base *ab, u16 service_id, u8 *ul_pipe, u8 *dl_pipe) { const struct service_to_pipe *entry; bool ul_set = false, dl_set = false; int i; for (i = 0; i < ab->hw_params->svc_to_ce_map_len; i++) { entry = &ab->hw_params->svc_to_ce_map[i]; if (__le32_to_cpu(entry->service_id) != service_id) continue; switch (__le32_to_cpu(entry->pipedir)) { case PIPEDIR_NONE: break; case PIPEDIR_IN: WARN_ON(dl_set); *dl_pipe = __le32_to_cpu(entry->pipenum); dl_set = true; break; case PIPEDIR_OUT: WARN_ON(ul_set); *ul_pipe = __le32_to_cpu(entry->pipenum); ul_set = true; break; case PIPEDIR_INOUT: WARN_ON(dl_set); WARN_ON(ul_set); *dl_pipe = __le32_to_cpu(entry->pipenum); *ul_pipe = __le32_to_cpu(entry->pipenum); dl_set = true; ul_set = true; break; } } if (WARN_ON(!ul_set || !dl_set)) return -ENOENT; return 0; } int ath12k_pci_get_msi_irq(struct device *dev, unsigned int vector) { struct pci_dev *pci_dev = to_pci_dev(dev); return pci_irq_vector(pci_dev, vector); } int ath12k_pci_get_user_msi_assignment(struct ath12k_base *ab, char *user_name, int *num_vectors, u32 *user_base_data, u32 *base_vector) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); const struct ath12k_msi_config *msi_config = ab_pci->msi_config; int idx; for (idx = 0; idx < msi_config->total_users; idx++) { if (strcmp(user_name, msi_config->users[idx].name) == 0) { *num_vectors = msi_config->users[idx].num_vectors; *user_base_data = msi_config->users[idx].base_vector + ab_pci->msi_ep_base_data; *base_vector = msi_config->users[idx].base_vector; ath12k_dbg(ab, ATH12K_DBG_PCI, "Assign MSI to user: %s, num_vectors: %d, user_base_data: %u, base_vector: %u\n", user_name, *num_vectors, *user_base_data, *base_vector); return 0; } } ath12k_err(ab, "Failed to find MSI assignment for %s!\n", user_name); return -EINVAL; } void ath12k_pci_get_msi_address(struct ath12k_base *ab, u32 *msi_addr_lo, u32 *msi_addr_hi) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); struct pci_dev *pci_dev = to_pci_dev(ab->dev); pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_LO, msi_addr_lo); if (test_bit(ATH12K_PCI_FLAG_IS_MSI_64, &ab_pci->flags)) { pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_HI, msi_addr_hi); } else { *msi_addr_hi = 0; } } void ath12k_pci_get_ce_msi_idx(struct ath12k_base *ab, u32 ce_id, u32 *msi_idx) { u32 i, msi_data_idx; for (i = 0, msi_data_idx = 0; i < ab->hw_params->ce_count; i++) { if (ath12k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR) continue; if (ce_id == i) break; msi_data_idx++; } *msi_idx = msi_data_idx; } void ath12k_pci_hif_ce_irq_enable(struct ath12k_base *ab) { ath12k_pci_ce_irqs_enable(ab); } void ath12k_pci_hif_ce_irq_disable(struct ath12k_base *ab) { ath12k_pci_ce_irq_disable_sync(ab); } void ath12k_pci_ext_irq_enable(struct ath12k_base *ab) { int i; for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath12k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; napi_enable(&irq_grp->napi); ath12k_pci_ext_grp_enable(irq_grp); } } void ath12k_pci_ext_irq_disable(struct ath12k_base *ab) { __ath12k_pci_ext_irq_disable(ab); ath12k_pci_sync_ext_irqs(ab); } int ath12k_pci_hif_suspend(struct ath12k_base *ab) { struct ath12k_pci *ar_pci = ath12k_pci_priv(ab); ath12k_mhi_suspend(ar_pci); return 0; } int ath12k_pci_hif_resume(struct ath12k_base *ab) { struct ath12k_pci *ar_pci = ath12k_pci_priv(ab); ath12k_mhi_resume(ar_pci); return 0; } void ath12k_pci_stop(struct ath12k_base *ab) { ath12k_pci_ce_irq_disable_sync(ab); ath12k_ce_cleanup_pipes(ab); } int ath12k_pci_start(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); set_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags); ath12k_pci_aspm_restore(ab_pci); ath12k_pci_ce_irqs_enable(ab); ath12k_ce_rx_post_buf(ab); return 0; } u32 ath12k_pci_read32(struct ath12k_base *ab, u32 offset) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); u32 val, window_start; int ret = 0; /* for offset beyond BAR + 4K - 32, may * need to wakeup MHI to access. */ if (test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags) && offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->wakeup) ret = ab_pci->pci_ops->wakeup(ab); if (offset < WINDOW_START) { val = ioread32(ab->mem + offset); } else { if (ab->static_window_map) window_start = ath12k_pci_get_window_start(ab, offset); else window_start = WINDOW_START; if (window_start == WINDOW_START) { spin_lock_bh(&ab_pci->window_lock); ath12k_pci_select_window(ab_pci, offset); val = ioread32(ab->mem + window_start + (offset & WINDOW_RANGE_MASK)); spin_unlock_bh(&ab_pci->window_lock); } else { if ((!window_start) && (offset >= PCI_MHIREGLEN_REG && offset <= PCI_MHI_REGION_END)) offset = offset - PCI_MHIREGLEN_REG; val = ioread32(ab->mem + window_start + (offset & WINDOW_RANGE_MASK)); } } if (test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags) && offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->release && !ret) ab_pci->pci_ops->release(ab); return val; } void ath12k_pci_write32(struct ath12k_base *ab, u32 offset, u32 value) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); u32 window_start; int ret = 0; /* for offset beyond BAR + 4K - 32, may * need to wakeup MHI to access. */ if (test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags) && offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->wakeup) ret = ab_pci->pci_ops->wakeup(ab); if (offset < WINDOW_START) { iowrite32(value, ab->mem + offset); } else { if (ab->static_window_map) window_start = ath12k_pci_get_window_start(ab, offset); else window_start = WINDOW_START; if (window_start == WINDOW_START) { spin_lock_bh(&ab_pci->window_lock); ath12k_pci_select_window(ab_pci, offset); iowrite32(value, ab->mem + window_start + (offset & WINDOW_RANGE_MASK)); spin_unlock_bh(&ab_pci->window_lock); } else { if ((!window_start) && (offset >= PCI_MHIREGLEN_REG && offset <= PCI_MHI_REGION_END)) offset = offset - PCI_MHIREGLEN_REG; iowrite32(value, ab->mem + window_start + (offset & WINDOW_RANGE_MASK)); } } if (test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags) && offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->release && !ret) ab_pci->pci_ops->release(ab); } int ath12k_pci_power_up(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); int ret; ab_pci->register_window = 0; clear_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags); ath12k_pci_sw_reset(ab_pci->ab, true); /* Disable ASPM during firmware download due to problems switching * to AMSS state. */ ath12k_pci_aspm_disable(ab_pci); ath12k_pci_msi_enable(ab_pci); ret = ath12k_mhi_start(ab_pci); if (ret) { ath12k_err(ab, "failed to start mhi: %d\n", ret); return ret; } if (ab->static_window_map) ath12k_pci_select_static_window(ab_pci); return 0; } void ath12k_pci_power_down(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); /* restore aspm in case firmware bootup fails */ ath12k_pci_aspm_restore(ab_pci); ath12k_pci_force_wake(ab_pci->ab); ath12k_pci_msi_disable(ab_pci); ath12k_mhi_stop(ab_pci); clear_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags); ath12k_pci_sw_reset(ab_pci->ab, false); } static const struct ath12k_hif_ops ath12k_pci_hif_ops = { .start = ath12k_pci_start, .stop = ath12k_pci_stop, .read32 = ath12k_pci_read32, .write32 = ath12k_pci_write32, .power_down = ath12k_pci_power_down, .power_up = ath12k_pci_power_up, .suspend = ath12k_pci_hif_suspend, .resume = ath12k_pci_hif_resume, .irq_enable = ath12k_pci_ext_irq_enable, .irq_disable = ath12k_pci_ext_irq_disable, .get_msi_address = ath12k_pci_get_msi_address, .get_user_msi_vector = ath12k_pci_get_user_msi_assignment, .map_service_to_pipe = ath12k_pci_map_service_to_pipe, .ce_irq_enable = ath12k_pci_hif_ce_irq_enable, .ce_irq_disable = ath12k_pci_hif_ce_irq_disable, .get_ce_msi_idx = ath12k_pci_get_ce_msi_idx, }; static void ath12k_pci_read_hw_version(struct ath12k_base *ab, u32 *major, u32 *minor) { u32 soc_hw_version; soc_hw_version = ath12k_pci_read32(ab, TCSR_SOC_HW_VERSION); *major = FIELD_GET(TCSR_SOC_HW_VERSION_MAJOR_MASK, soc_hw_version); *minor = FIELD_GET(TCSR_SOC_HW_VERSION_MINOR_MASK, soc_hw_version); ath12k_dbg(ab, ATH12K_DBG_PCI, "pci tcsr_soc_hw_version major %d minor %d\n", *major, *minor); } static int ath12k_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pci_dev) { struct ath12k_base *ab; struct ath12k_pci *ab_pci; u32 soc_hw_version_major, soc_hw_version_minor; int ret; ab = ath12k_core_alloc(&pdev->dev, sizeof(*ab_pci), ATH12K_BUS_PCI); if (!ab) { dev_err(&pdev->dev, "failed to allocate ath12k base\n"); return -ENOMEM; } ab->dev = &pdev->dev; pci_set_drvdata(pdev, ab); ab_pci = ath12k_pci_priv(ab); ab_pci->dev_id = pci_dev->device; ab_pci->ab = ab; ab_pci->pdev = pdev; ab->hif.ops = &ath12k_pci_hif_ops; pci_set_drvdata(pdev, ab); spin_lock_init(&ab_pci->window_lock); ret = ath12k_pci_claim(ab_pci, pdev); if (ret) { ath12k_err(ab, "failed to claim device: %d\n", ret); goto err_free_core; } switch (pci_dev->device) { case QCN9274_DEVICE_ID: ab_pci->msi_config = &ath12k_msi_config[0]; ab->static_window_map = true; ab_pci->pci_ops = &ath12k_pci_ops_qcn9274; ath12k_pci_read_hw_version(ab, &soc_hw_version_major, &soc_hw_version_minor); switch (soc_hw_version_major) { case ATH12K_PCI_SOC_HW_VERSION_2: ab->hw_rev = ATH12K_HW_QCN9274_HW20; break; case ATH12K_PCI_SOC_HW_VERSION_1: ab->hw_rev = ATH12K_HW_QCN9274_HW10; break; default: dev_err(&pdev->dev, "Unknown hardware version found for QCN9274: 0x%x\n", soc_hw_version_major); ret = -EOPNOTSUPP; goto err_pci_free_region; } break; case WCN7850_DEVICE_ID: ab_pci->msi_config = &ath12k_msi_config[0]; ab->static_window_map = false; ab_pci->pci_ops = &ath12k_pci_ops_wcn7850; ath12k_pci_read_hw_version(ab, &soc_hw_version_major, &soc_hw_version_minor); switch (soc_hw_version_major) { case ATH12K_PCI_SOC_HW_VERSION_2: ab->hw_rev = ATH12K_HW_WCN7850_HW20; break; default: dev_err(&pdev->dev, "Unknown hardware version found for WCN7850: 0x%x\n", soc_hw_version_major); ret = -EOPNOTSUPP; goto err_pci_free_region; } break; default: dev_err(&pdev->dev, "Unknown PCI device found: 0x%x\n", pci_dev->device); ret = -EOPNOTSUPP; goto err_pci_free_region; } ret = ath12k_pci_msi_alloc(ab_pci); if (ret) { ath12k_err(ab, "failed to alloc msi: %d\n", ret); goto err_pci_free_region; } ret = ath12k_core_pre_init(ab); if (ret) goto err_pci_msi_free; ret = ath12k_mhi_register(ab_pci); if (ret) { ath12k_err(ab, "failed to register mhi: %d\n", ret); goto err_pci_msi_free; } ret = ath12k_hal_srng_init(ab); if (ret) goto err_mhi_unregister; ret = ath12k_ce_alloc_pipes(ab); if (ret) { ath12k_err(ab, "failed to allocate ce pipes: %d\n", ret); goto err_hal_srng_deinit; } ath12k_pci_init_qmi_ce_config(ab); ret = ath12k_pci_config_irq(ab); if (ret) { ath12k_err(ab, "failed to config irq: %d\n", ret); goto err_ce_free; } ret = ath12k_core_init(ab); if (ret) { ath12k_err(ab, "failed to init core: %d\n", ret); goto err_free_irq; } return 0; err_free_irq: ath12k_pci_free_irq(ab); err_ce_free: ath12k_ce_free_pipes(ab); err_hal_srng_deinit: ath12k_hal_srng_deinit(ab); err_mhi_unregister: ath12k_mhi_unregister(ab_pci); err_pci_msi_free: ath12k_pci_msi_free(ab_pci); err_pci_free_region: ath12k_pci_free_region(ab_pci); err_free_core: ath12k_core_free(ab); return ret; } static void ath12k_pci_remove(struct pci_dev *pdev) { struct ath12k_base *ab = pci_get_drvdata(pdev); struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); if (test_bit(ATH12K_FLAG_QMI_FAIL, &ab->dev_flags)) { ath12k_pci_power_down(ab); ath12k_qmi_deinit_service(ab); goto qmi_fail; } set_bit(ATH12K_FLAG_UNREGISTERING, &ab->dev_flags); cancel_work_sync(&ab->reset_work); ath12k_core_deinit(ab); qmi_fail: ath12k_mhi_unregister(ab_pci); ath12k_pci_free_irq(ab); ath12k_pci_msi_free(ab_pci); ath12k_pci_free_region(ab_pci); ath12k_hal_srng_deinit(ab); ath12k_ce_free_pipes(ab); ath12k_core_free(ab); } static void ath12k_pci_shutdown(struct pci_dev *pdev) { struct ath12k_base *ab = pci_get_drvdata(pdev); ath12k_pci_power_down(ab); } static __maybe_unused int ath12k_pci_pm_suspend(struct device *dev) { struct ath12k_base *ab = dev_get_drvdata(dev); int ret; ret = ath12k_core_suspend(ab); if (ret) ath12k_warn(ab, "failed to suspend core: %d\n", ret); return ret; } static __maybe_unused int ath12k_pci_pm_resume(struct device *dev) { struct ath12k_base *ab = dev_get_drvdata(dev); int ret; ret = ath12k_core_resume(ab); if (ret) ath12k_warn(ab, "failed to resume core: %d\n", ret); return ret; } static SIMPLE_DEV_PM_OPS(ath12k_pci_pm_ops, ath12k_pci_pm_suspend, ath12k_pci_pm_resume); static struct pci_driver ath12k_pci_driver = { .name = "ath12k_pci", .id_table = ath12k_pci_id_table, .probe = ath12k_pci_probe, .remove = ath12k_pci_remove, .shutdown = ath12k_pci_shutdown, .driver.pm = &ath12k_pci_pm_ops, }; static int ath12k_pci_init(void) { int ret; ret = pci_register_driver(&ath12k_pci_driver); if (ret) { pr_err("failed to register ath12k pci driver: %d\n", ret); return ret; } return 0; } module_init(ath12k_pci_init); static void ath12k_pci_exit(void) { pci_unregister_driver(&ath12k_pci_driver); } module_exit(ath12k_pci_exit); MODULE_DESCRIPTION("Driver support for Qualcomm Technologies PCIe 802.11be WLAN devices"); MODULE_LICENSE("Dual BSD/GPL");