From patchwork Tue Dec 7 02:47:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Martinez X-Patchwork-Id: 12660885 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E21C4C433F5 for ; Tue, 7 Dec 2021 02:48:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231162AbhLGCvo (ORCPT ); Mon, 6 Dec 2021 21:51:44 -0500 Received: from mga07.intel.com ([134.134.136.100]:27268 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230146AbhLGCvm (ORCPT ); Mon, 6 Dec 2021 21:51:42 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10190"; a="300860559" X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="300860559" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Dec 2021 18:47:45 -0800 X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="748524131" Received: from rmarti10-desk.jf.intel.com ([134.134.150.146]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Dec 2021 18:47:44 -0800 From: Ricardo Martinez To: netdev@vger.kernel.org, linux-wireless@vger.kernel.org Cc: kuba@kernel.org, davem@davemloft.net, johannes@sipsolutions.net, ryazanov.s.a@gmail.com, loic.poulain@linaro.org, m.chetan.kumar@intel.com, chandrashekar.devegowda@intel.com, linuxwwan@intel.com, chiranjeevi.rapolu@linux.intel.com, haijun.liu@mediatek.com, amir.hanania@intel.com, andriy.shevchenko@linux.intel.com, dinesh.sharma@intel.com, eliot.lee@intel.com, mika.westerberg@linux.intel.com, moises.veleta@intel.com, pierre-louis.bossart@intel.com, muralidharan.sethuraman@intel.com, Soumya.Prakash.Mishra@intel.com, sreehari.kancharla@intel.com, suresh.nagaraj@intel.com, Ricardo Martinez Subject: [PATCH net-next v3 02/12] net: wwan: t7xx: Add core components Date: Mon, 6 Dec 2021 19:47:01 -0700 Message-Id: <20211207024711.2765-3-ricardo.martinez@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211207024711.2765-1-ricardo.martinez@linux.intel.com> References: <20211207024711.2765-1-ricardo.martinez@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Haijun Liu Registers the t7xx device driver with the kernel. Setup all the core components: PCIe layer, Modem Host Cross Core Interface (MHCCIF), modem control operations, modem state machine, and build infrastructure. * PCIe layer code implements driver probe and removal. * MHCCIF provides interrupt channels to communicate events such as handshake, PM and port enumeration. * Modem control implements the entry point for modem init, reset and exit. * The modem status monitor is a state machine used by modem control to complete initialization and stop. It is used also to propagate exception events reported by other components. Signed-off-by: Haijun Liu Signed-off-by: Chandrashekar Devegowda Co-developed-by: Ricardo Martinez Signed-off-by: Ricardo Martinez --- drivers/net/wwan/Kconfig | 14 + drivers/net/wwan/Makefile | 1 + drivers/net/wwan/t7xx/Makefile | 12 + drivers/net/wwan/t7xx/t7xx_common.h | 95 ++++ drivers/net/wwan/t7xx/t7xx_mhccif.c | 98 ++++ drivers/net/wwan/t7xx/t7xx_mhccif.h | 37 ++ drivers/net/wwan/t7xx/t7xx_modem_ops.c | 434 ++++++++++++++++ drivers/net/wwan/t7xx/t7xx_modem_ops.h | 84 +++ drivers/net/wwan/t7xx/t7xx_pci.c | 223 ++++++++ drivers/net/wwan/t7xx/t7xx_pci.h | 67 +++ drivers/net/wwan/t7xx/t7xx_pcie_mac.c | 277 ++++++++++ drivers/net/wwan/t7xx/t7xx_pcie_mac.h | 37 ++ drivers/net/wwan/t7xx/t7xx_reg.h | 379 ++++++++++++++ drivers/net/wwan/t7xx/t7xx_state_monitor.c | 569 +++++++++++++++++++++ drivers/net/wwan/t7xx/t7xx_state_monitor.h | 124 +++++ 15 files changed, 2451 insertions(+) create mode 100644 drivers/net/wwan/t7xx/Makefile create mode 100644 drivers/net/wwan/t7xx/t7xx_common.h create mode 100644 drivers/net/wwan/t7xx/t7xx_mhccif.c create mode 100644 drivers/net/wwan/t7xx/t7xx_mhccif.h create mode 100644 drivers/net/wwan/t7xx/t7xx_modem_ops.c create mode 100644 drivers/net/wwan/t7xx/t7xx_modem_ops.h create mode 100644 drivers/net/wwan/t7xx/t7xx_pci.c create mode 100644 drivers/net/wwan/t7xx/t7xx_pci.h create mode 100644 drivers/net/wwan/t7xx/t7xx_pcie_mac.c create mode 100644 drivers/net/wwan/t7xx/t7xx_pcie_mac.h create mode 100644 drivers/net/wwan/t7xx/t7xx_reg.h create mode 100644 drivers/net/wwan/t7xx/t7xx_state_monitor.c create mode 100644 drivers/net/wwan/t7xx/t7xx_state_monitor.h diff --git a/drivers/net/wwan/Kconfig b/drivers/net/wwan/Kconfig index bdb2b0e46c12..aa1a1f6bfc23 100644 --- a/drivers/net/wwan/Kconfig +++ b/drivers/net/wwan/Kconfig @@ -93,6 +93,20 @@ config IOSM If unsure, say N. +config MTK_T7XX + tristate "MediaTek PCIe 5G WWAN modem T7xx device" + depends on PCI + help + Enables MediaTek PCIe based 5G WWAN modem (T7xx series) device. + Adapts WWAN framework and provides network interface like wwan0 + and tty interfaces like wwan0at0 (AT protocol), wwan0mbim0 + (MBIM protocol), etc. + + To compile this driver as a module, choose M here: the module will be + called mtk_t7xx. + + If unsure, say N. + endif # WWAN endmenu diff --git a/drivers/net/wwan/Makefile b/drivers/net/wwan/Makefile index e722650bebea..3960c0ae2445 100644 --- a/drivers/net/wwan/Makefile +++ b/drivers/net/wwan/Makefile @@ -13,3 +13,4 @@ obj-$(CONFIG_MHI_WWAN_MBIM) += mhi_wwan_mbim.o obj-$(CONFIG_QCOM_BAM_DMUX) += qcom_bam_dmux.o obj-$(CONFIG_RPMSG_WWAN_CTRL) += rpmsg_wwan_ctrl.o obj-$(CONFIG_IOSM) += iosm/ +obj-$(CONFIG_MTK_T7XX) += t7xx/ diff --git a/drivers/net/wwan/t7xx/Makefile b/drivers/net/wwan/t7xx/Makefile new file mode 100644 index 000000000000..6a49013bc343 --- /dev/null +++ b/drivers/net/wwan/t7xx/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0-only + +ccflags-y += -Werror + +obj-${CONFIG_MTK_T7XX} := mtk_t7xx.o +mtk_t7xx-y:= t7xx_pci.o \ + t7xx_pcie_mac.o \ + t7xx_mhccif.o \ + t7xx_state_monitor.o \ + t7xx_modem_ops.o \ + t7xx_cldma.o \ + t7xx_hif_cldma.o \ diff --git a/drivers/net/wwan/t7xx/t7xx_common.h b/drivers/net/wwan/t7xx/t7xx_common.h new file mode 100644 index 000000000000..3f7042248d20 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_common.h @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Ricardo Martinez + * + * Contributors: + * Andy Shevchenko + * Chiranjeevi Rapolu + * Eliot Lee + * Moises Veleta + * Sreehari Kancharla + */ + +#ifndef __T7XX_COMMON_H__ +#define __T7XX_COMMON_H__ + +#include +#include +#include + +struct ccci_header { + __le32 packet_header; + __le32 packet_len; + __le32 status; + __le32 ex_msg; +}; + +enum mtk_txrx { + MTK_TX, + MTK_RX, +}; + +#define TXQ_TYPE_DEFAULT 0 + +#define CLDMA_NUM 2 + +#define MTK_SKB_64K 64528 /* 63kB + CCCI header */ +#define MTK_SKB_4K 3584 /* 3.5kB */ +#define NET_RX_BUF MTK_SKB_4K + +#define HDR_FLD_AST ((u32)BIT(31)) +#define HDR_FLD_SEQ GENMASK(30, 16) +#define HDR_FLD_CHN GENMASK(15, 0) + +#define CCCI_H_LEN 16 +/* For exception flow use CCCI_H_LEN + reserved space */ +#define CCCI_H_ELEN 128 + +/* Coupled with HW - indicates if there is data following the CCCI header or not */ +#define CCCI_HEADER_NO_DATA 0xffffffff + +/* Control identification numbers for AP<->MD messages */ +#define CTL_ID_HS1_MSG 0x0 +#define CTL_ID_HS2_MSG 0x1 +#define CTL_ID_HS3_MSG 0x2 +#define CTL_ID_MD_EX 0x4 +#define CTL_ID_DRV_VER_ERROR 0x5 +#define CTL_ID_MD_EX_ACK 0x6 +#define CTL_ID_MD_EX_PASS 0x8 +#define CTL_ID_PORT_ENUM 0x9 + +/* Modem exception check identification code - "EXCP" */ +#define MD_EX_CHK_ID 0x45584350 +/* Modem exception check acknowledge identification code - "EREC" */ +#define MD_EX_CHK_ACK_ID 0x45524543 + +enum md_state { + MD_STATE_INVALID, /* No traffic */ + MD_STATE_GATED, /* No traffic */ + MD_STATE_WAITING_FOR_HS1, + MD_STATE_WAITING_FOR_HS2, + MD_STATE_READY, + MD_STATE_EXCEPTION, + MD_STATE_RESET, /* No traffic */ + MD_STATE_WAITING_TO_STOP, + MD_STATE_STOPPED, +}; + +#ifdef NET_SKBUFF_DATA_USES_OFFSET +static inline unsigned int t7xx_skb_data_size(struct sk_buff *skb) +{ + return skb->head + skb->end - skb->data; +} +#else +static inline unsigned int t7xx_skb_data_size(struct sk_buff *skb) +{ + return skb->end - skb->data; +} +#endif + +#endif diff --git a/drivers/net/wwan/t7xx/t7xx_mhccif.c b/drivers/net/wwan/t7xx/t7xx_mhccif.c new file mode 100644 index 000000000000..20aae457629c --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_mhccif.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Sreehari Kancharla + * + * Contributors: + * Amir Hanania + * Ricardo Martinez + */ + +#include +#include +#include +#include +#include + +#include "t7xx_mhccif.h" +#include "t7xx_modem_ops.h" +#include "t7xx_pci.h" +#include "t7xx_pcie_mac.h" +#include "t7xx_reg.h" + +static void t7xx_mhccif_clear_interrupts(struct t7xx_pci_dev *t7xx_dev, u32 mask) +{ + void __iomem *mhccif_pbase = t7xx_dev->base_addr.mhccif_rc_base; + + /* Clear level 2 interrupt */ + iowrite32(mask, mhccif_pbase + REG_EP2RC_SW_INT_ACK); + /* Ensure write is complete */ + t7xx_mhccif_read_sw_int_sts(t7xx_dev); + /* Clear level 1 interrupt */ + t7xx_pcie_mac_clear_int_status(t7xx_dev, MHCCIF_INT); +} + +static irqreturn_t t7xx_mhccif_isr_thread(int irq, void *data) +{ + struct t7xx_pci_dev *t7xx_dev = data; + u32 int_sts, val; + + val = L1_1_DISABLE_BIT(1) | L1_2_DISABLE_BIT(1); + iowrite32(val, IREG_BASE(t7xx_dev) + DIS_ASPM_LOWPWR_SET_0); + + int_sts = t7xx_mhccif_read_sw_int_sts(t7xx_dev); + if (int_sts & t7xx_dev->mhccif_bitmask) + t7xx_pci_mhccif_isr(t7xx_dev); + + t7xx_mhccif_clear_interrupts(t7xx_dev, int_sts); + t7xx_pcie_mac_set_int(t7xx_dev, MHCCIF_INT); + return IRQ_HANDLED; +} + +u32 t7xx_mhccif_read_sw_int_sts(struct t7xx_pci_dev *t7xx_dev) +{ + return ioread32(t7xx_dev->base_addr.mhccif_rc_base + REG_EP2RC_SW_INT_STS); +} + +void t7xx_mhccif_mask_set(struct t7xx_pci_dev *t7xx_dev, u32 val) +{ + iowrite32(val, t7xx_dev->base_addr.mhccif_rc_base + REG_EP2RC_SW_INT_EAP_MASK_SET); +} + +void t7xx_mhccif_mask_clr(struct t7xx_pci_dev *t7xx_dev, u32 val) +{ + iowrite32(val, t7xx_dev->base_addr.mhccif_rc_base + REG_EP2RC_SW_INT_EAP_MASK_CLR); +} + +u32 t7xx_mhccif_mask_get(struct t7xx_pci_dev *t7xx_dev) +{ + return ioread32(t7xx_dev->base_addr.mhccif_rc_base + REG_EP2RC_SW_INT_EAP_MASK); +} + +static irqreturn_t t7xx_mhccif_isr_handler(int irq, void *data) +{ + return IRQ_WAKE_THREAD; +} + +void t7xx_mhccif_init(struct t7xx_pci_dev *t7xx_dev) +{ + t7xx_dev->base_addr.mhccif_rc_base = t7xx_dev->base_addr.pcie_ext_reg_base + + MHCCIF_RC_DEV_BASE - + t7xx_dev->base_addr.pcie_dev_reg_trsl_addr; + + t7xx_dev->intr_handler[MHCCIF_INT] = t7xx_mhccif_isr_handler; + t7xx_dev->intr_thread[MHCCIF_INT] = t7xx_mhccif_isr_thread; + t7xx_dev->callback_param[MHCCIF_INT] = t7xx_dev; +} + +void t7xx_mhccif_h2d_swint_trigger(struct t7xx_pci_dev *t7xx_dev, u32 channel) +{ + void __iomem *mhccif_pbase = t7xx_dev->base_addr.mhccif_rc_base; + + iowrite32(BIT(channel), mhccif_pbase + REG_RC2EP_SW_BSY); + iowrite32(channel, mhccif_pbase + REG_RC2EP_SW_TCHNUM); +} diff --git a/drivers/net/wwan/t7xx/t7xx_mhccif.h b/drivers/net/wwan/t7xx/t7xx_mhccif.h new file mode 100644 index 000000000000..62e9afa59296 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_mhccif.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Sreehari Kancharla + * + * Contributors: + * Amir Hanania + * Ricardo Martinez + */ + +#ifndef __T7XX_MHCCIF_H__ +#define __T7XX_MHCCIF_H__ + +#include + +#include "t7xx_pci.h" +#include "t7xx_reg.h" + +#define D2H_SW_INT_MASK (D2H_INT_EXCEPTION_INIT | \ + D2H_INT_EXCEPTION_INIT_DONE | \ + D2H_INT_EXCEPTION_CLEARQ_DONE | \ + D2H_INT_EXCEPTION_ALLQ_RESET | \ + D2H_INT_PORT_ENUM | \ + D2H_INT_ASYNC_MD_HK) + +void t7xx_mhccif_mask_set(struct t7xx_pci_dev *t7xx_dev, u32 val); +void t7xx_mhccif_mask_clr(struct t7xx_pci_dev *t7xx_dev, u32 val); +u32 t7xx_mhccif_mask_get(struct t7xx_pci_dev *t7xx_dev); +void t7xx_mhccif_init(struct t7xx_pci_dev *t7xx_dev); +u32 t7xx_mhccif_read_sw_int_sts(struct t7xx_pci_dev *t7xx_dev); +void t7xx_mhccif_h2d_swint_trigger(struct t7xx_pci_dev *t7xx_dev, u32 channel); + +#endif /*__T7XX_MHCCIF_H__ */ diff --git a/drivers/net/wwan/t7xx/t7xx_modem_ops.c b/drivers/net/wwan/t7xx/t7xx_modem_ops.c new file mode 100644 index 000000000000..53ab88d33b56 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_modem_ops.c @@ -0,0 +1,434 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, 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 "t7xx_hif_cldma.h" +#include "t7xx_mhccif.h" +#include "t7xx_modem_ops.h" +#include "t7xx_pci.h" +#include "t7xx_pcie_mac.h" +#include "t7xx_reg.h" +#include "t7xx_state_monitor.h" + +#define RGU_RESET_DELAY_MS 10 +#define PORT_RESET_DELAY_MS 2000 +#define EX_HS_TIMEOUT_MS 5000 +#define EX_HS_POLL_DELAY_MS 10 + +static inline 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; + 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_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) + t7xx_fsm_recv_md_intr(ctl, MD_IRQ_PORT_ENUM); + } + + 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; + t7xx_fsm_recv_md_intr(ctl, MD_IRQ_CCIF_EX); + } + } 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 0; +} + +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; + } + +#endif + return 0; +} + +int t7xx_acpi_fldr_func(struct t7xx_pci_dev *t7xx_dev) +{ + return t7xx_acpi_reset(t7xx_dev, "_RST"); +} + +static void t7xx_reset_device_via_pmic(struct t7xx_pci_dev *t7xx_dev) +{ + u32 val; + + val = ioread32(IREG_BASE(t7xx_dev) + PCIE_MISC_DEV_STATUS); + if (val & MISC_RESET_TYPE_PLDR) + t7xx_acpi_reset(t7xx_dev, "MRST._RST"); + else if (val & MISC_RESET_TYPE_FLDR) + t7xx_acpi_fldr_func(t7xx_dev); +} + +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); +} + +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_cldma_exception(md->md_ctrl[ID_CLDMA1], 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_dev->mhccif_bitmask = 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); +} + +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; + + t7xx_cldma_switch_cfg(md->md_ctrl[ID_CLDMA1]); + t7xx_cldma_start(md->md_ctrl[ID_CLDMA1]); + t7xx_fsm_broadcast_state(ctl, MD_STATE_WAITING_FOR_HS2); + md->core_md.ready = true; + wake_up(&ctl->async_hk_wq); +} + +void t7xx_md_event_notify(struct t7xx_modem *md, enum md_event_id evt_id) +{ + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + void __iomem *mhccif_base; + 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); + 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; + } else if (ctl->exp_flg) { + md->exp_id &= ~D2H_INT_ASYNC_MD_HK; + } else 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; + mhccif_base = md->t7xx_dev->base_addr.mhccif_rc_base; + 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); + } else { + t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_ASYNC_MD_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); + 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; + md->core_md.ready = false; + 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); + return md; +} + +void 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; + spin_lock_init(&md->exp_lock); + t7xx_fsm_reset(md); + t7xx_cldma_reset(md->md_ctrl[ID_CLDMA1]); + md->md_init_finish = true; +} + +/** + * 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(ID_CLDMA1, t7xx_dev); + if (ret) + goto err_destroy_hswq; + + ret = t7xx_fsm_init(md); + if (ret) + goto err_destroy_hswq; + + ret = t7xx_cldma_init(md, md->md_ctrl[ID_CLDMA1]); + if (ret) + goto err_uninit_fsm; + + t7xx_fsm_append_cmd(md->fsm_ctl, FSM_CMD_START, 0); + t7xx_md_sys_sw_init(t7xx_dev); + md->md_init_finish = true; + return 0; + +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) +{ + struct t7xx_modem *md = t7xx_dev->md; + + t7xx_pcie_mac_clear_int(t7xx_dev, SAP_RGU_INT); + + if (!md->md_init_finish) + return; + + t7xx_fsm_append_cmd(md->fsm_ctl, FSM_CMD_PRE_STOP, FSM_CMD_FLAG_WAIT_FOR_COMPLETION); + t7xx_cldma_exit(md->md_ctrl[ID_CLDMA1]); + t7xx_fsm_uninit(md); + destroy_workqueue(md->handshake_wq); +} diff --git a/drivers/net/wwan/t7xx/t7xx_modem_ops.h b/drivers/net/wwan/t7xx/t7xx_modem_ops.h new file mode 100644 index 000000000000..24d2ee5bfbda --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_modem_ops.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Eliot Lee + * Moises Veleta + * Ricardo Martinez + * + * Contributors: + * Amir Hanania + * Chiranjeevi Rapolu + * Sreehari Kancharla + */ + +#ifndef __T7XX_MODEM_OPS_H__ +#define __T7XX_MODEM_OPS_H__ + +#include +#include +#include + +#include "t7xx_common.h" +#include "t7xx_pci.h" + +#define FEATURE_COUNT 64 + +/** + * enum hif_ex_stage - HIF exception handshake stages with the HW. + * @HIF_EX_INIT: Disable and clear TXQ. + * @HIF_EX_INIT_DONE: Polling for initialization to be done. + * @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. + */ +enum hif_ex_stage { + HIF_EX_INIT, + HIF_EX_INIT_DONE, + HIF_EX_CLEARQ_DONE, + HIF_EX_ALLQ_RESET, +}; + +struct mtk_runtime_feature { + u8 feature_id; + u8 support_info; + u8 reserved[2]; + __le32 data_len; +}; + +enum md_event_id { + FSM_PRE_START, + FSM_START, + FSM_READY, +}; + +struct t7xx_sys_info { + bool ready; +}; + +struct t7xx_modem { + struct cldma_ctrl *md_ctrl[CLDMA_NUM]; + struct t7xx_pci_dev *t7xx_dev; + struct t7xx_sys_info core_md; + bool md_init_finish; + bool rgu_irq_asserted; + struct workqueue_struct *handshake_wq; + struct work_struct handshake_work; + struct t7xx_fsm_ctl *fsm_ctl; + struct port_proxy *port_prox; + unsigned int exp_id; + spinlock_t exp_lock; /* Protects exception events */ +}; + +void t7xx_md_exception_handshake(struct t7xx_modem *md); +void t7xx_md_event_notify(struct t7xx_modem *md, enum md_event_id evt_id); +void t7xx_md_reset(struct t7xx_pci_dev *t7xx_dev); +int t7xx_md_init(struct t7xx_pci_dev *t7xx_dev); +void t7xx_md_exit(struct t7xx_pci_dev *t7xx_dev); +void t7xx_clear_rgu_irq(struct t7xx_pci_dev *t7xx_dev); +int t7xx_acpi_fldr_func(struct t7xx_pci_dev *t7xx_dev); +int t7xx_pci_mhccif_isr(struct t7xx_pci_dev *t7xx_dev); + +#endif /* __T7XX_MODEM_OPS_H__ */ diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c new file mode 100644 index 000000000000..f525468ed472 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_pci.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Ricardo Martinez + * Sreehari Kancharla + * + * Contributors: + * Amir Hanania + * Andy Shevchenko + * Chiranjeevi Rapolu + * Eliot Lee + * Moises Veleta + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "t7xx_mhccif.h" +#include "t7xx_modem_ops.h" +#include "t7xx_pci.h" +#include "t7xx_pcie_mac.h" +#include "t7xx_reg.h" + +#define PCI_IREG_BASE 0 +#define PCI_EREG_BASE 2 + +static int t7xx_request_irq(struct pci_dev *pdev) +{ + struct t7xx_pci_dev *t7xx_dev; + int ret, i; + + t7xx_dev = pci_get_drvdata(pdev); + + for (i = 0; i < EXT_INT_NUM; i++) { + const char *irq_descr; + int irq_vec; + + if (!t7xx_dev->intr_handler[i]) + continue; + + irq_descr = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_%d", + dev_driver_string(&pdev->dev), i); + if (!irq_descr) { + ret = -ENOMEM; + break; + } + + irq_vec = pci_irq_vector(pdev, i); + ret = request_threaded_irq(irq_vec, t7xx_dev->intr_handler[i], + t7xx_dev->intr_thread[i], 0, irq_descr, + t7xx_dev->callback_param[i]); + if (ret) { + dev_err(&pdev->dev, "Failed to request IRQ: %d\n", ret); + break; + } + } + + if (ret) { + while (i--) { + if (!t7xx_dev->intr_handler[i]) + continue; + + free_irq(pci_irq_vector(pdev, i), t7xx_dev->callback_param[i]); + } + } + + return ret; +} + +static int t7xx_setup_msix(struct t7xx_pci_dev *t7xx_dev) +{ + struct pci_dev *pdev = t7xx_dev->pdev; + int ret; + + /* Only using 6 interrupts, but HW-design requires power-of-2 IRQs allocation */ + ret = pci_alloc_irq_vectors(pdev, EXT_INT_NUM, EXT_INT_NUM, PCI_IRQ_MSIX); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to allocate MSI-X entry: %d\n", ret); + return ret; + } + + ret = t7xx_request_irq(pdev); + if (ret) { + pci_free_irq_vectors(pdev); + return ret; + } + + t7xx_pcie_set_mac_msix_cfg(t7xx_dev, EXT_INT_NUM); + return 0; +} + +static int t7xx_interrupt_init(struct t7xx_pci_dev *t7xx_dev) +{ + int ret, i; + + if (!t7xx_dev->pdev->msix_cap) + return -EINVAL; + + ret = t7xx_setup_msix(t7xx_dev); + if (ret) + return ret; + + /* IPs enable interrupts when ready */ + for (i = EXT_INT_START; i < EXT_INT_START + EXT_INT_NUM; i++) + PCIE_MAC_MSIX_MSK_SET(t7xx_dev, i); + + return 0; +} + +static inline void t7xx_pci_infracfg_ao_calc(struct t7xx_pci_dev *t7xx_dev) +{ + t7xx_dev->base_addr.infracfg_ao_base = t7xx_dev->base_addr.pcie_ext_reg_base + + INFRACFG_AO_DEV_CHIP - + t7xx_dev->base_addr.pcie_dev_reg_trsl_addr; +} + +static int t7xx_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct t7xx_pci_dev *t7xx_dev; + int ret; + + t7xx_dev = devm_kzalloc(&pdev->dev, sizeof(*t7xx_dev), GFP_KERNEL); + if (!t7xx_dev) + return -ENOMEM; + + pci_set_drvdata(pdev, t7xx_dev); + t7xx_dev->pdev = pdev; + + ret = pcim_enable_device(pdev); + if (ret) + return ret; + + pci_set_master(pdev); + + ret = pcim_iomap_regions(pdev, BIT(PCI_IREG_BASE) | BIT(PCI_EREG_BASE), pci_name(pdev)); + if (ret) { + dev_err(&pdev->dev, "Could not request BARs: %d\n", ret); + return -ENOMEM; + } + + ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) { + dev_err(&pdev->dev, "Could not set PCI DMA mask: %d\n", ret); + return ret; + } + + ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) { + dev_err(&pdev->dev, "Could not set consistent PCI DMA mask: %d\n", ret); + return ret; + } + + IREG_BASE(t7xx_dev) = pcim_iomap_table(pdev)[PCI_IREG_BASE]; + t7xx_dev->base_addr.pcie_ext_reg_base = pcim_iomap_table(pdev)[PCI_EREG_BASE]; + + t7xx_pcie_mac_atr_init(t7xx_dev); + t7xx_pci_infracfg_ao_calc(t7xx_dev); + t7xx_mhccif_init(t7xx_dev); + + ret = t7xx_md_init(t7xx_dev); + if (ret) + return ret; + + t7xx_pcie_mac_interrupts_dis(t7xx_dev); + + ret = t7xx_interrupt_init(t7xx_dev); + if (ret) + return ret; + + t7xx_pcie_mac_set_int(t7xx_dev, MHCCIF_INT); + t7xx_pcie_mac_interrupts_en(t7xx_dev); + + return 0; +} + +static void t7xx_pci_remove(struct pci_dev *pdev) +{ + struct t7xx_pci_dev *t7xx_dev; + int i; + + t7xx_dev = pci_get_drvdata(pdev); + t7xx_md_exit(t7xx_dev); + + for (i = 0; i < EXT_INT_NUM; i++) { + if (!t7xx_dev->intr_handler[i]) + continue; + + free_irq(pci_irq_vector(pdev, i), t7xx_dev->callback_param[i]); + } + + pci_free_irq_vectors(t7xx_dev->pdev); +} + +static const struct pci_device_id t7xx_pci_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x4d75) }, + { } +}; +MODULE_DEVICE_TABLE(pci, t7xx_pci_table); + +static struct pci_driver t7xx_pci_driver = { + .name = "mtk_t7xx", + .id_table = t7xx_pci_table, + .probe = t7xx_pci_probe, + .remove = t7xx_pci_remove, +}; + +module_pci_driver(t7xx_pci_driver); + +MODULE_AUTHOR("MediaTek Inc"); +MODULE_DESCRIPTION("MediaTek PCIe 5G WWAN modem T7xx driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/net/wwan/t7xx/t7xx_pci.h b/drivers/net/wwan/t7xx/t7xx_pci.h new file mode 100644 index 000000000000..b52aaa182a10 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_pci.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Ricardo Martinez + * Sreehari Kancharla + * + * Contributors: + * Amir Hanania + * Chiranjeevi Rapolu + * Moises Veleta + */ + +#ifndef __T7XX_PCI_H__ +#define __T7XX_PCI_H__ + +#include +#include +#include + +#include "t7xx_reg.h" + +/* struct t7xx_addr_base - holds base addresses + * @pcie_mac_ireg_base: PCIe MAC register base + * @pcie_ext_reg_base: used to calculate base addresses for CLDMA, DPMA and MHCCIF registers + * @pcie_dev_reg_trsl_addr: used to calculate the register base address + * @infracfg_ao_base: base address used in CLDMA reset operations + * @mhccif_rc_base: host view of MHCCIF rc base addr + */ +struct t7xx_addr_base { + void __iomem *pcie_mac_ireg_base; + void __iomem *pcie_ext_reg_base; + u32 pcie_dev_reg_trsl_addr; + void __iomem *infracfg_ao_base; + void __iomem *mhccif_rc_base; +}; + +typedef irqreturn_t (*t7xx_intr_callback)(int irq, void *param); + +/* struct t7xx_pci_dev - MTK device context structure + * @intr_handler: array of handler function for request_threaded_irq + * @intr_thread: array of thread_fn for request_threaded_irq + * @callback_param: array of cookie passed back to interrupt functions + * @mhccif_bitmask: device to host interrupt mask + * @pdev: PCI device + * @base_addr: memory base addresses of HW components + * @md: modem interface + * @ccmni_ctlb: context structure used to control the network data path + * @rgu_pci_irq_en: RGU callback isr registered and active + * @pools: pre allocated skb pools + */ +struct t7xx_pci_dev { + t7xx_intr_callback intr_handler[EXT_INT_NUM]; + t7xx_intr_callback intr_thread[EXT_INT_NUM]; + void *callback_param[EXT_INT_NUM]; + u32 mhccif_bitmask; + struct pci_dev *pdev; + struct t7xx_addr_base base_addr; + struct t7xx_modem *md; + struct t7xx_ccmni_ctrl *ccmni_ctlb; + bool rgu_pci_irq_en; +}; + +#endif /* __T7XX_PCI_H__ */ diff --git a/drivers/net/wwan/t7xx/t7xx_pcie_mac.c b/drivers/net/wwan/t7xx/t7xx_pcie_mac.c new file mode 100644 index 000000000000..fa5effa4e07a --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_pcie_mac.c @@ -0,0 +1,277 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Moises Veleta + * Sreehari Kancharla + * + * Contributors: + * Amir Hanania + * Chiranjeevi Rapolu + * Ricardo Martinez + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "t7xx_pci.h" +#include "t7xx_pcie_mac.h" +#include "t7xx_reg.h" + +#define PCIE_REG_BAR 2 +#define PCIE_REG_PORT ATR_SRC_PCI_WIN0 +#define PCIE_REG_TABLE_NUM 0 +#define PCIE_REG_TRSL_PORT ATR_DST_AXIM_0 + +#define PCIE_DEV_DMA_PORT_START ATR_SRC_AXIS_0 +#define PCIE_DEV_DMA_PORT_END ATR_SRC_AXIS_2 +#define PCIE_DEV_DMA_TABLE_NUM 0 +#define PCIE_DEV_DMA_TRSL_ADDR 0 +#define PCIE_DEV_DMA_SRC_ADDR 0 +#define PCIE_DEV_DMA_TRANSPARENT 1 +#define PCIE_DEV_DMA_SIZE 0 + +enum t7xx_atr_src_port { + ATR_SRC_PCI_WIN0, + ATR_SRC_PCI_WIN1, + ATR_SRC_AXIS_0, + ATR_SRC_AXIS_1, + ATR_SRC_AXIS_2, + ATR_SRC_AXIS_3, +}; + +enum t7xx_atr_dst_port { + ATR_DST_PCI_TRX, + ATR_DST_PCI_CONFIG, + ATR_DST_AXIM_0 = 4, + ATR_DST_AXIM_1, + ATR_DST_AXIM_2, + ATR_DST_AXIM_3, +}; + +struct t7xx_atr_config { + u64 src_addr; + u64 trsl_addr; + u64 size; + u32 port; + u32 table; + enum t7xx_atr_dst_port trsl_id; + u32 transparent; +}; + +static void t7xx_pcie_mac_atr_tables_dis(void __iomem *pbase, enum t7xx_atr_src_port port) +{ + void __iomem *reg; + int i, offset; + + for (i = 0; i < ATR_TABLE_NUM_PER_ATR; i++) { + offset = ATR_PORT_OFFSET * port + ATR_TABLE_OFFSET * i; + reg = pbase + ATR_PCIE_WIN0_T0_ATR_PARAM_SRC_ADDR + offset; + iowrite64(0, reg); + } +} + +static int t7xx_pcie_mac_atr_cfg(struct t7xx_pci_dev *t7xx_dev, struct t7xx_atr_config *cfg) +{ + struct device *dev = &t7xx_dev->pdev->dev; + void __iomem *pbase = IREG_BASE(t7xx_dev); + int atr_size, pos, offset; + void __iomem *reg; + u64 value; + + if (cfg->transparent) { + /* No address conversion is performed */ + atr_size = ATR_TRANSPARENT_SIZE; + } else { + if (cfg->src_addr & (cfg->size - 1)) { + dev_err(dev, "Source address is not aligned to size\n"); + return -EINVAL; + } + + if (cfg->trsl_addr & (cfg->size - 1)) { + dev_err(dev, "Translation address %llx is not aligned to size %llx\n", + cfg->trsl_addr, cfg->size - 1); + return -EINVAL; + } + + pos = __ffs64(cfg->size); + + /* HW calculates the address translation space as 2^(atr_size + 1) */ + atr_size = pos - 1; + } + + offset = ATR_PORT_OFFSET * cfg->port + ATR_TABLE_OFFSET * cfg->table; + + reg = pbase + ATR_PCIE_WIN0_T0_TRSL_ADDR + offset; + value = cfg->trsl_addr & ATR_PCIE_WIN0_ADDR_ALGMT; + iowrite64(value, reg); + + reg = pbase + ATR_PCIE_WIN0_T0_TRSL_PARAM + offset; + iowrite32(cfg->trsl_id, reg); + + reg = pbase + ATR_PCIE_WIN0_T0_ATR_PARAM_SRC_ADDR + offset; + value = (cfg->src_addr & ATR_PCIE_WIN0_ADDR_ALGMT) | (atr_size << 1) | BIT(0); + iowrite64(value, reg); + + /* Ensure ATR is set */ + ioread64(reg); + return 0; +} + +/** + * t7xx_pcie_mac_atr_init() - Initialize address translation. + * @t7xx_dev: MTK device. + * + * Setup ATR for ports & device. + */ +void t7xx_pcie_mac_atr_init(struct t7xx_pci_dev *t7xx_dev) +{ + struct t7xx_atr_config cfg; + u32 i; + + /* Disable for all ports */ + for (i = ATR_SRC_PCI_WIN0; i <= ATR_SRC_AXIS_3; i++) + t7xx_pcie_mac_atr_tables_dis(IREG_BASE(t7xx_dev), i); + + memset(&cfg, 0, sizeof(cfg)); + /* Config ATR for RC to access device's register */ + cfg.src_addr = pci_resource_start(t7xx_dev->pdev, PCIE_REG_BAR); + cfg.size = PCIE_REG_SIZE_CHIP; + cfg.trsl_addr = PCIE_REG_TRSL_ADDR_CHIP; + cfg.port = PCIE_REG_PORT; + cfg.table = PCIE_REG_TABLE_NUM; + cfg.trsl_id = PCIE_REG_TRSL_PORT; + t7xx_pcie_mac_atr_tables_dis(IREG_BASE(t7xx_dev), cfg.port); + t7xx_pcie_mac_atr_cfg(t7xx_dev, &cfg); + + t7xx_dev->base_addr.pcie_dev_reg_trsl_addr = PCIE_REG_TRSL_ADDR_CHIP; + + /* Config ATR for EP to access RC's memory */ + for (i = PCIE_DEV_DMA_PORT_START; i <= PCIE_DEV_DMA_PORT_END; i++) { + cfg.src_addr = PCIE_DEV_DMA_SRC_ADDR; + cfg.size = PCIE_DEV_DMA_SIZE; + cfg.trsl_addr = PCIE_DEV_DMA_TRSL_ADDR; + cfg.port = i; + cfg.table = PCIE_DEV_DMA_TABLE_NUM; + cfg.trsl_id = ATR_DST_PCI_TRX; + cfg.transparent = PCIE_DEV_DMA_TRANSPARENT; + t7xx_pcie_mac_atr_tables_dis(IREG_BASE(t7xx_dev), cfg.port); + t7xx_pcie_mac_atr_cfg(t7xx_dev, &cfg); + } +} + +/** + * t7xx_pcie_mac_enable_disable_int() - Enable/disable interrupts. + * @t7xx_dev: MTK device. + * @enable: Enable/disable. + * + * Enable or disable device interrupts. + */ +static void t7xx_pcie_mac_enable_disable_int(struct t7xx_pci_dev *t7xx_dev, bool enable) +{ + u32 value; + + value = ioread32(IREG_BASE(t7xx_dev) + ISTAT_HST_CTRL); + + if (enable) + value &= ~ISTAT_HST_CTRL_DIS; + else + value |= ISTAT_HST_CTRL_DIS; + + iowrite32(value, IREG_BASE(t7xx_dev) + ISTAT_HST_CTRL); +} + +void t7xx_pcie_mac_interrupts_en(struct t7xx_pci_dev *t7xx_dev) +{ + t7xx_pcie_mac_enable_disable_int(t7xx_dev, true); +} + +void t7xx_pcie_mac_interrupts_dis(struct t7xx_pci_dev *t7xx_dev) +{ + t7xx_pcie_mac_enable_disable_int(t7xx_dev, false); +} + +/** + * t7xx_pcie_mac_clear_set_int() - Clear/set interrupt by type. + * @t7xx_dev: MTK device. + * @int_type: Interrupt type. + * @clear: Clear/set. + * + * Clear or set device interrupt by type. + */ +static void t7xx_pcie_mac_clear_set_int(struct t7xx_pci_dev *t7xx_dev, + enum pcie_int int_type, bool clear) +{ + void __iomem *reg; + u32 val; + + if (t7xx_dev->pdev->msix_enabled) { + if (clear) + reg = IREG_BASE(t7xx_dev) + IMASK_HOST_MSIX_CLR_GRP0_0; + else + reg = IREG_BASE(t7xx_dev) + IMASK_HOST_MSIX_SET_GRP0_0; + } else { + if (clear) + reg = IREG_BASE(t7xx_dev) + INT_EN_HST_CLR; + else + reg = IREG_BASE(t7xx_dev) + INT_EN_HST_SET; + } + + val = BIT(EXT_INT_START + int_type); + iowrite32(val, reg); +} + +void t7xx_pcie_mac_clear_int(struct t7xx_pci_dev *t7xx_dev, enum pcie_int int_type) +{ + t7xx_pcie_mac_clear_set_int(t7xx_dev, int_type, true); +} + +void t7xx_pcie_mac_set_int(struct t7xx_pci_dev *t7xx_dev, enum pcie_int int_type) +{ + t7xx_pcie_mac_clear_set_int(t7xx_dev, int_type, false); +} + +/** + * t7xx_pcie_mac_clear_int_status() - Clear interrupt status by type. + * @t7xx_dev: MTK device. + * @int_type: Interrupt type. + * + * Enable or disable device interrupts' status by type. + */ +void t7xx_pcie_mac_clear_int_status(struct t7xx_pci_dev *t7xx_dev, enum pcie_int int_type) +{ + void __iomem *reg; + u32 val; + + if (t7xx_dev->pdev->msix_enabled) + reg = IREG_BASE(t7xx_dev) + MSIX_ISTAT_HST_GRP0_0; + else + reg = IREG_BASE(t7xx_dev) + ISTAT_HST; + + val = BIT(EXT_INT_START + int_type); + iowrite32(val, reg); +} + +/** + * t7xx_pcie_set_mac_msix_cfg() - Write MSIX control configuration. + * @t7xx_dev: MTK device. + * @irq_count: Number of MSIX IRQ vectors. + * + * Write IRQ count to device. + */ +void t7xx_pcie_set_mac_msix_cfg(struct t7xx_pci_dev *t7xx_dev, unsigned int irq_count) +{ + u32 val; + + val = ffs(irq_count) * 2 - 1; + iowrite32(val, IREG_BASE(t7xx_dev) + PCIE_CFG_MSIX); +} diff --git a/drivers/net/wwan/t7xx/t7xx_pcie_mac.h b/drivers/net/wwan/t7xx/t7xx_pcie_mac.h new file mode 100644 index 000000000000..7cb6942fd44f --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_pcie_mac.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Sreehari Kancharla + * + * Contributors: + * Moises Veleta + * Ricardo Martinez + */ + +#ifndef __T7XX_PCIE_MAC_H__ +#define __T7XX_PCIE_MAC_H__ + +#include +#include + +#include "t7xx_pci.h" +#include "t7xx_reg.h" + +#define IREG_BASE(t7xx_dev) ((t7xx_dev)->base_addr.pcie_mac_ireg_base) + +#define PCIE_MAC_MSIX_MSK_SET(t7xx_dev, ext_id) \ + iowrite32(BIT(ext_id), IREG_BASE(t7xx_dev) + IMASK_HOST_MSIX_SET_GRP0_0) + +void t7xx_pcie_mac_interrupts_en(struct t7xx_pci_dev *t7xx_dev); +void t7xx_pcie_mac_interrupts_dis(struct t7xx_pci_dev *t7xx_dev); +void t7xx_pcie_mac_atr_init(struct t7xx_pci_dev *t7xx_dev); +void t7xx_pcie_mac_clear_int(struct t7xx_pci_dev *t7xx_dev, enum pcie_int int_type); +void t7xx_pcie_mac_set_int(struct t7xx_pci_dev *t7xx_dev, enum pcie_int int_type); +void t7xx_pcie_mac_clear_int_status(struct t7xx_pci_dev *t7xx_dev, enum pcie_int int_type); +void t7xx_pcie_set_mac_msix_cfg(struct t7xx_pci_dev *t7xx_dev, unsigned int irq_count); + +#endif /* __T7XX_PCIE_MAC_H__ */ diff --git a/drivers/net/wwan/t7xx/t7xx_reg.h b/drivers/net/wwan/t7xx/t7xx_reg.h new file mode 100644 index 000000000000..ba2127ca8501 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_reg.h @@ -0,0 +1,379 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Chiranjeevi Rapolu + * + * Contributors: + * Amir Hanania + * Andy Shevchenko + * Eliot Lee + * Moises Veleta + * Ricardo Martinez + * Sreehari Kancharla + */ + +#ifndef __T7XX_REG_H__ +#define __T7XX_REG_H__ + +#include + +/* RC part */ + +/* Device base address offset - update if reg BAR base is changed */ +#define MHCCIF_RC_DEV_BASE 0x10024000 + +#define REG_RC2EP_SW_BSY 0x04 +#define REG_RC2EP_SW_INT_START 0x08 + +#define REG_RC2EP_SW_TCHNUM 0x0c +#define H2D_CH_EXCEPTION_ACK 1 +#define H2D_CH_EXCEPTION_CLEARQ_ACK 2 +#define H2D_CH_DS_LOCK 3 +/* Channels 4-8 are reserved */ +#define H2D_CH_SUSPEND_REQ 9 +#define H2D_CH_RESUME_REQ 10 +#define H2D_CH_SUSPEND_REQ_AP 11 +#define H2D_CH_RESUME_REQ_AP 12 +#define H2D_CH_DEVICE_RESET 13 +#define H2D_CH_DRM_DISABLE_AP 14 + +#define REG_EP2RC_SW_INT_STS 0x10 +#define REG_EP2RC_SW_INT_ACK 0x14 +#define REG_EP2RC_SW_INT_EAP_MASK 0x20 +#define REG_EP2RC_SW_INT_EAP_MASK_SET 0x30 +#define REG_EP2RC_SW_INT_EAP_MASK_CLR 0x40 + +#define D2H_INT_DS_LOCK_ACK BIT(0) +#define D2H_INT_EXCEPTION_INIT BIT(1) +#define D2H_INT_EXCEPTION_INIT_DONE BIT(2) +#define D2H_INT_EXCEPTION_CLEARQ_DONE BIT(3) +#define D2H_INT_EXCEPTION_ALLQ_RESET BIT(4) +#define D2H_INT_PORT_ENUM BIT(5) +/* Bits 6-10 are reserved */ +#define D2H_INT_SUSPEND_ACK BIT(11) +#define D2H_INT_RESUME_ACK BIT(12) +#define D2H_INT_SUSPEND_ACK_AP BIT(13) +#define D2H_INT_RESUME_ACK_AP BIT(14) +#define D2H_INT_ASYNC_SAP_HK BIT(15) +#define D2H_INT_ASYNC_MD_HK BIT(16) + +/* EP part */ + +/* Register base */ +#define INFRACFG_AO_DEV_CHIP 0x10001000 + +/* ATR setting */ +#define PCIE_REG_TRSL_ADDR_CHIP 0x10000000 +#define PCIE_REG_SIZE_CHIP 0x00400000 + +/* Reset Generic Unit (RGU) */ +#define TOPRGU_CH_PCIE_IRQ_STA 0x1000790c + +#define ATR_PORT_OFFSET 0x100 +#define ATR_TABLE_OFFSET 0x20 +#define ATR_TABLE_NUM_PER_ATR 8 +#define ATR_TRANSPARENT_SIZE 0x3f + +/* PCIE_MAC_IREG Register Definition */ + +#define INT_EN_HST 0x0188 +#define ISTAT_HST 0x018c + +#define ISTAT_HST_CTRL 0x01ac +#define ISTAT_HST_CTRL_DIS BIT(0) + +#define INT_EN_HST_SET 0x01f0 +#define INT_EN_HST_CLR 0x01f4 + +#define PCIE_MISC_CTRL 0x0348 +#define PCIE_MISC_MAC_SLEEP_DIS BIT(7) + +#define PCIE_CFG_MSIX 0x03ec +#define ATR_PCIE_WIN0_T0_ATR_PARAM_SRC_ADDR 0x0600 +#define ATR_PCIE_WIN0_T0_TRSL_ADDR 0x0608 +#define ATR_PCIE_WIN0_T0_TRSL_PARAM 0x0610 +#define ATR_PCIE_WIN0_ADDR_ALGMT GENMASK_ULL(63, 12) + +#define ATR_SRC_ADDR_INVALID 0x007f + +#define PCIE_PM_RESUME_STATE 0x0d0c + +enum t7xx_pm_resume_state { + PM_RESUME_REG_STATE_L3, + PM_RESUME_REG_STATE_L1, + PM_RESUME_REG_STATE_INIT, + PM_RESUME_REG_STATE_EXP, + PM_RESUME_REG_STATE_L2, + PM_RESUME_REG_STATE_L2_EXP, +}; + +#define PCIE_MISC_DEV_STATUS 0x0d1c +#define MISC_STAGE_MASK GENMASK(2, 0) +#define MISC_RESET_TYPE_PLDR BIT(26) +#define MISC_RESET_TYPE_FLDR BIT(27) +#define LINUX_STAGE 4 + +#define PCIE_RESOURCE_STATUS 0x0d28 +#define PCIE_RESOURCE_STATUS_MSK GENMASK(4, 0) + +#define DIS_ASPM_LOWPWR_SET_0 0x0e50 +#define DIS_ASPM_LOWPWR_CLR_0 0x0e54 +#define DIS_ASPM_LOWPWR_SET_1 0x0e58 +#define DIS_ASPM_LOWPWR_CLR_1 0x0e5c +#define L1_DISABLE_BIT(i) BIT((i) * 4 + 1) +#define L1_1_DISABLE_BIT(i) BIT((i) * 4 + 2) +#define L1_2_DISABLE_BIT(i) BIT((i) * 4 + 3) + +#define MSIX_SW_TRIG_SET_GRP0_0 0x0e80 +#define MSIX_ISTAT_HST_GRP0_0 0x0f00 +#define IMASK_HOST_MSIX_SET_GRP0_0 0x3000 +#define IMASK_HOST_MSIX_CLR_GRP0_0 0x3080 +#define IMASK_HOST_MSIX_GRP0_0 0x3100 +#define EXT_INT_START 24 +#define EXT_INT_NUM 8 +#define MSIX_MSK_SET_ALL GENMASK(31, 24) + +enum pcie_int { + DPMAIF_INT = 0, + CLDMA0_INT, + CLDMA1_INT, + CLDMA2_INT, + MHCCIF_INT, + DPMAIF2_INT, + SAP_RGU_INT, + CLDMA3_INT, +}; + +/* DPMA definitions */ + +#define DPMAIF_PD_BASE 0x1022d000 +#define BASE_DPMAIF_UL DPMAIF_PD_BASE +#define BASE_DPMAIF_DL (DPMAIF_PD_BASE + 0x100) +#define BASE_DPMAIF_AP_MISC (DPMAIF_PD_BASE + 0x400) +#define BASE_DPMAIF_MMW_HPC (DPMAIF_PD_BASE + 0x600) +#define BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX (DPMAIF_PD_BASE + 0x900) +#define BASE_DPMAIF_PD_SRAM_DL (DPMAIF_PD_BASE + 0xc00) +#define BASE_DPMAIF_PD_SRAM_UL (DPMAIF_PD_BASE + 0xd00) + +#define DPMAIF_AO_BASE 0x10014000 +#define BASE_DPMAIF_AO_UL DPMAIF_AO_BASE +#define BASE_DPMAIF_AO_DL (DPMAIF_AO_BASE + 0x400) + +/* DPMAIF UL */ +#define DPMAIF_UL_ADD_DESC (BASE_DPMAIF_UL + 0x00) +#define DPMAIF_UL_CHK_BUSY (BASE_DPMAIF_UL + 0x88) +#define DPMAIF_UL_RESERVE_AO_RW (BASE_DPMAIF_UL + 0xac) +#define DPMAIF_UL_ADD_DESC_CH0 (BASE_DPMAIF_UL + 0xb0) + +/* DPMAIF DL */ +#define DPMAIF_DL_BAT_INIT (BASE_DPMAIF_DL + 0x00) +#define DPMAIF_DL_BAT_ADD (BASE_DPMAIF_DL + 0x04) +#define DPMAIF_DL_BAT_INIT_CON0 (BASE_DPMAIF_DL + 0x08) +#define DPMAIF_DL_BAT_INIT_CON1 (BASE_DPMAIF_DL + 0x0c) +#define DPMAIF_DL_BAT_INIT_CON2 (BASE_DPMAIF_DL + 0x10) +#define DPMAIF_DL_BAT_INIT_CON3 (BASE_DPMAIF_DL + 0x50) +#define DPMAIF_DL_CHK_BUSY (BASE_DPMAIF_DL + 0xb4) + +/* DPMAIF AP misc */ +#define DPMAIF_AP_L2TISAR0 (BASE_DPMAIF_AP_MISC + 0x00) +#define DPMAIF_AP_APDL_L2TISAR0 (BASE_DPMAIF_AP_MISC + 0x50) +#define DPMAIF_AP_IP_BUSY (BASE_DPMAIF_AP_MISC + 0x60) +#define DPMAIF_AP_CG_EN (BASE_DPMAIF_AP_MISC + 0x68) +#define DPMAIF_AP_OVERWRITE_CFG (BASE_DPMAIF_AP_MISC + 0x90) +#define DPMAIF_AP_MEM_CLR (BASE_DPMAIF_AP_MISC + 0x94) +#define DPMAIF_AP_ALL_L2TISAR0_MASK GENMASK(31, 0) +#define DPMAIF_AP_APDL_ALL_L2TISAR0_MASK GENMASK(31, 0) +#define DPMAIF_AP_IP_BUSY_MASK GENMASK(31, 0) + +/* DPMAIF AO UL */ +#define DPMAIF_AO_UL_INIT_SET (BASE_DPMAIF_AO_UL + 0x0) +#define DPMAIF_AO_UL_CHNL_ARB0 (BASE_DPMAIF_AO_UL + 0x1c) +#define DPMAIF_AO_UL_AP_L2TIMR0 (BASE_DPMAIF_AO_UL + 0x80) +#define DPMAIF_AO_UL_AP_L2TIMCR0 (BASE_DPMAIF_AO_UL + 0x84) +#define DPMAIF_AO_UL_AP_L2TIMSR0 (BASE_DPMAIF_AO_UL + 0x88) +#define DPMAIF_AO_UL_AP_L1TIMR0 (BASE_DPMAIF_AO_UL + 0x8c) +#define DPMAIF_AO_UL_APDL_L2TIMR0 (BASE_DPMAIF_AO_UL + 0x90) +#define DPMAIF_AO_UL_APDL_L2TIMCR0 (BASE_DPMAIF_AO_UL + 0x94) +#define DPMAIF_AO_UL_APDL_L2TIMSR0 (BASE_DPMAIF_AO_UL + 0x98) +#define DPMAIF_AO_AP_DLUL_IP_BUSY_MASK (BASE_DPMAIF_AO_UL + 0x9c) + +/* DPMAIF PD SRAM UL */ +#define DPMAIF_AO_UL_CHNL0_CON0 (BASE_DPMAIF_PD_SRAM_UL + 0x10) +#define DPMAIF_AO_UL_CHNL0_CON1 (BASE_DPMAIF_PD_SRAM_UL + 0x14) +#define DPMAIF_AO_UL_CHNL0_CON2 (BASE_DPMAIF_PD_SRAM_UL + 0x18) +#define DPMAIF_AO_UL_CH0_STA (BASE_DPMAIF_PD_SRAM_UL + 0x70) + +/* DPMAIF AO DL */ +#define DPMAIF_AO_DL_INIT_SET (BASE_DPMAIF_AO_DL + 0x00) +#define DPMAIF_AO_DL_IRQ_MASK (BASE_DPMAIF_AO_DL + 0x0c) +#define DPMAIF_AO_DL_DLQPIT_INIT_CON5 (BASE_DPMAIF_AO_DL + 0x28) +#define DPMAIF_AO_DL_DLQPIT_TRIG_THRES (BASE_DPMAIF_AO_DL + 0x34) + +/* DPMAIF PD SRAM DL */ +#define DPMAIF_AO_DL_PKTINFO_CON0 (BASE_DPMAIF_PD_SRAM_DL + 0x00) +#define DPMAIF_AO_DL_PKTINFO_CON1 (BASE_DPMAIF_PD_SRAM_DL + 0x04) +#define DPMAIF_AO_DL_PKTINFO_CON2 (BASE_DPMAIF_PD_SRAM_DL + 0x08) +#define DPMAIF_AO_DL_RDY_CHK_THRES (BASE_DPMAIF_PD_SRAM_DL + 0x0c) +#define DPMAIF_AO_DL_RDY_CHK_FRG_THRES (BASE_DPMAIF_PD_SRAM_DL + 0x10) + +#define DPMAIF_AO_DL_DLQ_AGG_CFG (BASE_DPMAIF_PD_SRAM_DL + 0x20) +#define DPMAIF_AO_DL_DLQPIT_TIMEOUT0 (BASE_DPMAIF_PD_SRAM_DL + 0x24) +#define DPMAIF_AO_DL_DLQPIT_TIMEOUT1 (BASE_DPMAIF_PD_SRAM_DL + 0x28) +#define DPMAIF_AO_DL_HPC_CNTL (BASE_DPMAIF_PD_SRAM_DL + 0x38) +#define DPMAIF_AO_DL_PIT_SEQ_END (BASE_DPMAIF_PD_SRAM_DL + 0x40) + +#define DPMAIF_AO_DL_BAT_RIDX (BASE_DPMAIF_PD_SRAM_DL + 0xd8) +#define DPMAIF_AO_DL_BAT_WRIDX (BASE_DPMAIF_PD_SRAM_DL + 0xdc) +#define DPMAIF_AO_DL_PIT_RIDX (BASE_DPMAIF_PD_SRAM_DL + 0xec) +#define DPMAIF_AO_DL_PIT_WRIDX (BASE_DPMAIF_PD_SRAM_DL + 0x60) +#define DPMAIF_AO_DL_FRGBAT_WRIDX (BASE_DPMAIF_PD_SRAM_DL + 0x78) +#define DPMAIF_AO_DL_DLQ_WRIDX (BASE_DPMAIF_PD_SRAM_DL + 0xa4) + +/* DPMAIF HPC */ +#define DPMAIF_HPC_INTR_MASK (BASE_DPMAIF_MMW_HPC + 0x0f4) +#define DPMA_HPC_ALL_INT_MASK GENMASK(15, 0) + +#define DPMAIF_HPC_DLQ_PATH_MODE 3 +#define DPMAIF_HPC_ADD_MODE_DF 0 +#define DPMAIF_HPC_TOTAL_NUM 8 +#define DPMAIF_HPC_MAX_TOTAL_NUM 8 + +/* DPMAIF DL queue */ +#define DPMAIF_DL_DLQPIT_INIT (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x00) +#define DPMAIF_DL_DLQPIT_ADD (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x10) +#define DPMAIF_DL_DLQPIT_INIT_CON0 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x14) +#define DPMAIF_DL_DLQPIT_INIT_CON1 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x18) +#define DPMAIF_DL_DLQPIT_INIT_CON2 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x1c) +#define DPMAIF_DL_DLQPIT_INIT_CON3 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x20) +#define DPMAIF_DL_DLQPIT_INIT_CON4 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x24) +#define DPMAIF_DL_DLQPIT_INIT_CON5 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x28) +#define DPMAIF_DL_DLQPIT_INIT_CON6 (BASE_DPMAIF_DL_DLQ_REMOVEAO_IDX + 0x2c) + +#define DPMAIF_ULQSAR_n(q) (DPMAIF_AO_UL_CHNL0_CON0 + 0x10 * (q)) +#define DPMAIF_UL_DRBSIZE_ADDRH_n(q) (DPMAIF_AO_UL_CHNL0_CON1 + 0x10 * (q)) +#define DPMAIF_UL_DRB_ADDRH_n(q) (DPMAIF_AO_UL_CHNL0_CON2 + 0x10 * (q)) +#define DPMAIF_ULQ_STA0_n(q) (DPMAIF_AO_UL_CH0_STA + 0x04 * (q)) +#define DPMAIF_ULQ_ADD_DESC_CH_n(q) (DPMAIF_UL_ADD_DESC_CH0 + 0x04 * (q)) + +#define DPMAIF_UL_DRB_RIDX_OFFSET 16 + +#define DPMAIF_AP_RGU_ASSERT 0x10001150 +#define DPMAIF_AP_RGU_DEASSERT 0x10001154 +#define DPMAIF_AP_RST_BIT BIT(2) + +#define DPMAIF_AP_AO_RGU_ASSERT 0x10001140 +#define DPMAIF_AP_AO_RGU_DEASSERT 0x10001144 +#define DPMAIF_AP_AO_RST_BIT BIT(6) + +/* DPMAIF init/restore */ +#define DPMAIF_UL_ADD_NOT_READY BIT(31) +#define DPMAIF_UL_ADD_UPDATE BIT(31) +#define DPMAIF_UL_ADD_COUNT_MASK GENMASK(15, 0) +#define DPMAIF_UL_ALL_QUE_ARB_EN GENMASK(11, 8) + +#define DPMAIF_DL_ADD_UPDATE BIT(31) +#define DPMAIF_DL_ADD_NOT_READY BIT(31) +#define DPMAIF_DL_FRG_ADD_UPDATE BIT(16) +#define DPMAIF_DL_ADD_COUNT_MASK GENMASK(15, 0) + +#define DPMAIF_DL_BAT_INIT_ALLSET BIT(0) +#define DPMAIF_DL_BAT_FRG_INIT BIT(16) +#define DPMAIF_DL_BAT_INIT_EN BIT(31) +#define DPMAIF_DL_BAT_INIT_NOT_READY BIT(31) +#define DPMAIF_DL_BAT_INIT_ONLY_ENABLE_BIT 0 + +#define DPMAIF_DL_PIT_INIT_ALLSET BIT(0) +#define DPMAIF_DL_PIT_INIT_EN BIT(31) +#define DPMAIF_DL_PIT_INIT_NOT_READY BIT(31) + +#define DPMAIF_PKT_ALIGN64_MODE 0 +#define DPMAIF_PKT_ALIGN128_MODE 1 + +#define DPMAIF_BAT_REMAIN_SZ_BASE 16 +#define DPMAIF_BAT_BUFFER_SZ_BASE 128 +#define DPMAIF_FRG_BUFFER_SZ_BASE 128 + +#define DLQ_PIT_IDX_SIZE 0x20 + +#define DPMAIF_PIT_SIZE_MSK GENMASK(17, 0) + +#define DPMAIF_PIT_REM_CNT_MSK GENMASK(17, 0) + +#define DPMAIF_BAT_EN_MSK BIT(16) +#define DPMAIF_FRG_EN_MSK BIT(28) +#define DPMAIF_BAT_SIZE_MSK GENMASK(15, 0) + +#define DPMAIF_BAT_BID_MAXCNT_MSK GENMASK(31, 16) +#define DPMAIF_BAT_REMAIN_MINSZ_MSK GENMASK(15, 8) +#define DPMAIF_PIT_CHK_NUM_MSK GENMASK(31, 24) +#define DPMAIF_BAT_BUF_SZ_MSK GENMASK(16, 8) +#define DPMAIF_FRG_BUF_SZ_MSK GENMASK(16, 8) +#define DPMAIF_BAT_RSV_LEN_MSK GENMASK(7, 0) +#define DPMAIF_PKT_ALIGN_MSK GENMASK(23, 22) + +#define DPMAIF_BAT_CHECK_THRES_MSK GENMASK(21, 16) +#define DPMAIF_FRG_CHECK_THRES_MSK GENMASK(7, 0) + +#define DPMAIF_PKT_ALIGN_EN BIT(23) + +#define DPMAIF_DRB_SIZE_MSK GENMASK(15, 0) + +#define DPMAIF_DL_PIT_WRIDX_MSK GENMASK(17, 0) +#define DPMAIF_DL_BAT_WRIDX_MSK GENMASK(17, 0) +#define DPMAIF_DL_FRG_WRIDX_MSK GENMASK(17, 0) + +/* Bit fields of registers */ +/* DPMAIF_UL_CHK_BUSY */ +#define DPMAIF_UL_IDLE_STS BIT(11) +/* DPMAIF_DL_CHK_BUSY */ +#define DPMAIF_DL_IDLE_STS BIT(23) +/* DPMAIF_AO_DL_RDY_CHK_THRES */ +#define DPMAIF_DL_PKT_CHECKSUM_EN BIT(31) +#define DPMAIF_PORT_MODE_PCIE BIT(30) +#define DPMAIF_DL_BURST_PIT_EN BIT(13) +/* DPMAIF_DL_BAT_INIT_CON1 */ +#define DPMAIF_DL_BAT_CACHE_PRI BIT(22) +/* DPMAIF_AP_MEM_CLR */ +#define DPMAIF_MEM_CLR BIT(0) +/* DPMAIF_AP_OVERWRITE_CFG */ +#define DPMAIF_SRAM_SYNC BIT(0) +/* DPMAIF_AO_UL_INIT_SET */ +#define DPMAIF_UL_INIT_DONE BIT(0) +/* DPMAIF_AO_DL_INIT_SET */ +#define DPMAIF_DL_INIT_DONE BIT(0) +/* DPMAIF_AO_DL_PIT_SEQ_END */ +#define DPMAIF_DL_PIT_SEQ_MSK GENMASK(7, 0) +/* DPMAIF_UL_RESERVE_AO_RW */ +#define DPMAIF_PCIE_MODE_SET_VALUE 0x55 +/* DPMAIF_AP_CG_EN */ +#define DPMAIF_CG_EN 0x7f + +#define DPMAIF_UDL_IP_BUSY BIT(0) +#define DPMAIF_DL_INT_DLQ0_QDONE BIT(8) +#define DPMAIF_DL_INT_DLQ1_QDONE BIT(9) +#define DPMAIF_DL_INT_DLQ0_PITCNT_LEN BIT(10) +#define DPMAIF_DL_INT_DLQ1_PITCNT_LEN BIT(11) +#define DPMAIF_DL_INT_Q2TOQ1 BIT(24) +#define DPMAIF_DL_INT_Q2APTOP BIT(25) + +#define DPMAIF_DLQ_LOW_TIMEOUT_THRES_MKS GENMASK(15, 0) +#define DPMAIF_DLQ_HIGH_TIMEOUT_THRES_MSK GENMASK(31, 16) + +/* DPMAIF DLQ HW configure */ +#define DPMAIF_AGG_MAX_LEN_DF 65535 +#define DPMAIF_AGG_TBL_ENT_NUM_DF 50 +#define DPMAIF_HASH_PRIME_DF 13 +#define DPMAIF_MID_TIMEOUT_THRES_DF 100 +#define DPMAIF_DLQ_TIMEOUT_THRES_DF 100 +#define DPMAIF_DLQ_PRS_THRES_DF 10 +#define DPMAIF_DLQ_HASH_BIT_CHOOSE_DF 0 + +#define DPMAIF_DLQPIT_EN_MSK BIT(20) +#define DPMAIF_DLQPIT_CHAN_OFS 16 +#define DPMAIF_ADD_DLQ_PIT_CHAN_OFS 20 + +#endif /* __T7XX_REG_H__ */ diff --git a/drivers/net/wwan/t7xx/t7xx_state_monitor.c b/drivers/net/wwan/t7xx/t7xx_state_monitor.c new file mode 100644 index 000000000000..cfd4e4b1a8df --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_state_monitor.c @@ -0,0 +1,569 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Haijun Liu + * Eliot Lee + * Moises Veleta + * Ricardo Martinez + * + * Contributors: + * Amir Hanania + * Sreehari Kancharla + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "t7xx_hif_cldma.h" +#include "t7xx_mhccif.h" +#include "t7xx_modem_ops.h" +#include "t7xx_pci.h" +#include "t7xx_pcie_mac.h" +#include "t7xx_reg.h" +#include "t7xx_state_monitor.h" + +#define FSM_DRM_DISABLE_DELAY_MS 200 +#define FSM_EVENT_POLL_INTERVAL_MS 20 +#define FSM_MD_EX_REC_OK_TIMEOUT_MS 10000 +#define FSM_MD_EX_PASS_TIMEOUT_MS (45 * 1000) +#define FSM_CMD_TIMEOUT_MS 2000 + +void t7xx_fsm_notifier_register(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier) +{ + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + unsigned long flags; + + spin_lock_irqsave(&ctl->notifier_lock, flags); + list_add_tail(¬ifier->entry, &ctl->notifier_list); + spin_unlock_irqrestore(&ctl->notifier_lock, flags); +} + +void t7xx_fsm_notifier_unregister(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier) +{ + struct t7xx_fsm_notifier *notifier_cur, *notifier_next; + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + unsigned long flags; + + spin_lock_irqsave(&ctl->notifier_lock, flags); + list_for_each_entry_safe(notifier_cur, notifier_next, &ctl->notifier_list, entry) { + if (notifier_cur == notifier) + list_del(¬ifier->entry); + } + + spin_unlock_irqrestore(&ctl->notifier_lock, flags); +} + +static void fsm_state_notify(struct t7xx_modem *md, enum md_state state) +{ + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + struct t7xx_fsm_notifier *notifier; + unsigned long flags; + + spin_lock_irqsave(&ctl->notifier_lock, flags); + list_for_each_entry(notifier, &ctl->notifier_list, entry) { + spin_unlock_irqrestore(&ctl->notifier_lock, flags); + if (notifier->notifier_fn) + notifier->notifier_fn(state, notifier->data); + + spin_lock_irqsave(&ctl->notifier_lock, flags); + } + + spin_unlock_irqrestore(&ctl->notifier_lock, flags); +} + +void t7xx_fsm_broadcast_state(struct t7xx_fsm_ctl *ctl, enum md_state state) +{ + if (ctl->md_state != MD_STATE_WAITING_FOR_HS2 && state == MD_STATE_READY) + return; + + ctl->md_state = state; + + fsm_state_notify(ctl->md, state); +} + +static void fsm_finish_command(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd, int result) +{ + if (cmd->flag & FSM_CMD_FLAG_WAIT_FOR_COMPLETION) { + *cmd->ret = result; + complete_all(cmd->done); + } + + kfree(cmd); +} + +static void fsm_del_kf_event(struct t7xx_fsm_event *event) +{ + list_del(&event->entry); + kfree(event); +} + +static void fsm_flush_event_cmd_qs(struct t7xx_fsm_ctl *ctl) +{ + struct device *dev = &ctl->md->t7xx_dev->pdev->dev; + struct t7xx_fsm_event *event, *evt_next; + struct t7xx_fsm_command *cmd, *cmd_next; + unsigned long flags; + + spin_lock_irqsave(&ctl->command_lock, flags); + list_for_each_entry_safe(cmd, cmd_next, &ctl->command_queue, entry) { + dev_warn(dev, "Unhandled command %d\n", cmd->cmd_id); + list_del(&cmd->entry); + fsm_finish_command(ctl, cmd, -EINVAL); + } + + spin_unlock_irqrestore(&ctl->command_lock, flags); + spin_lock_irqsave(&ctl->event_lock, flags); + list_for_each_entry_safe(event, evt_next, &ctl->event_queue, entry) { + dev_warn(dev, "Unhandled event %d\n", event->event_id); + fsm_del_kf_event(event); + } + + spin_unlock_irqrestore(&ctl->event_lock, flags); +} + +static void fsm_routine_exception(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd, + enum t7xx_ex_reason reason) +{ + struct device *dev = &ctl->md->t7xx_dev->pdev->dev; + bool rec_ok = false, pass = false; + struct t7xx_fsm_event *event; + unsigned long flags; + int cnt; + + dev_err(dev, "Exception %d, from %ps\n", reason, __builtin_return_address(0)); + + if (ctl->curr_state != FSM_STATE_READY && ctl->curr_state != FSM_STATE_STARTING) { + if (cmd) + fsm_finish_command(ctl, cmd, -EINVAL); + + return; + } + + ctl->last_state = ctl->curr_state; + ctl->curr_state = FSM_STATE_EXCEPTION; + + switch (reason) { + case EXCEPTION_HS_TIMEOUT: + dev_err(dev, "BOOT_HS_FAIL\n"); + break; + + case EXCEPTION_EVENT: + t7xx_fsm_broadcast_state(ctl, MD_STATE_EXCEPTION); + t7xx_md_exception_handshake(ctl->md); + + cnt = 0; + while (cnt < FSM_MD_EX_REC_OK_TIMEOUT_MS / FSM_EVENT_POLL_INTERVAL_MS) { + if (kthread_should_stop()) + return; + + spin_lock_irqsave(&ctl->event_lock, flags); + event = list_first_entry_or_null(&ctl->event_queue, + struct t7xx_fsm_event, entry); + if (event) { + if (event->event_id == FSM_EVENT_MD_EX) { + fsm_del_kf_event(event); + } else if (event->event_id == FSM_EVENT_MD_EX_REC_OK) { + rec_ok = true; + fsm_del_kf_event(event); + } + } + + spin_unlock_irqrestore(&ctl->event_lock, flags); + if (rec_ok) + break; + + cnt++; + /* Try again after 20ms */ + msleep(FSM_EVENT_POLL_INTERVAL_MS); + } + + cnt = 0; + while (cnt < FSM_MD_EX_PASS_TIMEOUT_MS / FSM_EVENT_POLL_INTERVAL_MS) { + if (kthread_should_stop()) + return; + + spin_lock_irqsave(&ctl->event_lock, flags); + event = list_first_entry_or_null(&ctl->event_queue, + struct t7xx_fsm_event, entry); + if (event && event->event_id == FSM_EVENT_MD_EX_PASS) { + pass = true; + fsm_del_kf_event(event); + } + + spin_unlock_irqrestore(&ctl->event_lock, flags); + + if (pass) + break; + cnt++; + /* Try again after 20ms */ + msleep(FSM_EVENT_POLL_INTERVAL_MS); + } + + break; + + default: + break; + } + + if (cmd) + fsm_finish_command(ctl, cmd, 0); +} + +static void fsm_stopped_handler(struct t7xx_fsm_ctl *ctl) +{ + ctl->last_state = ctl->curr_state; + ctl->curr_state = FSM_STATE_STOPPED; + + t7xx_fsm_broadcast_state(ctl, MD_STATE_STOPPED); + t7xx_md_reset(ctl->md->t7xx_dev); +} + +static void fsm_routine_stopped(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd) +{ + if (ctl->curr_state == FSM_STATE_STOPPED) { + fsm_finish_command(ctl, cmd, -EINVAL); + return; + } + + fsm_stopped_handler(ctl); + fsm_finish_command(ctl, cmd, 0); +} + +static void fsm_routine_stopping(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd) +{ + struct t7xx_pci_dev *t7xx_dev; + struct cldma_ctrl *md_ctrl; + int err; + + if (ctl->curr_state == FSM_STATE_STOPPED || ctl->curr_state == FSM_STATE_STOPPING) { + fsm_finish_command(ctl, cmd, -EINVAL); + return; + } + + md_ctrl = ctl->md->md_ctrl[ID_CLDMA1]; + t7xx_dev = ctl->md->t7xx_dev; + + ctl->last_state = ctl->curr_state; + ctl->curr_state = FSM_STATE_STOPPING; + t7xx_fsm_broadcast_state(ctl, MD_STATE_WAITING_TO_STOP); + t7xx_cldma_stop(md_ctrl); + + if (!ctl->md->rgu_irq_asserted) { + t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DRM_DISABLE_AP); + /* Wait for the DRM disable to take effect */ + msleep(FSM_DRM_DISABLE_DELAY_MS); + + err = t7xx_acpi_fldr_func(t7xx_dev); + if (err) + t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DEVICE_RESET); + } + + fsm_stopped_handler(ctl); + fsm_finish_command(ctl, cmd, 0); +} + +static void fsm_routine_ready(struct t7xx_fsm_ctl *ctl) +{ + struct t7xx_modem *md = ctl->md; + + ctl->last_state = ctl->curr_state; + ctl->curr_state = FSM_STATE_READY; + t7xx_fsm_broadcast_state(ctl, MD_STATE_READY); + t7xx_md_event_notify(md, FSM_READY); +} + +static void fsm_routine_starting(struct t7xx_fsm_ctl *ctl) +{ + struct t7xx_modem *md = ctl->md; + struct device *dev; + + ctl->last_state = ctl->curr_state; + ctl->curr_state = FSM_STATE_STARTING; + + t7xx_fsm_broadcast_state(ctl, MD_STATE_WAITING_FOR_HS1); + t7xx_md_event_notify(md, FSM_START); + + wait_event_interruptible_timeout(ctl->async_hk_wq, md->core_md.ready || ctl->exp_flg, + HZ * 60); + dev = &md->t7xx_dev->pdev->dev; + + if (ctl->exp_flg) + dev_err(dev, "MD exception is captured during handshake\n"); + + if (!md->core_md.ready) { + dev_err(dev, "MD handshake timeout\n"); + fsm_routine_exception(ctl, NULL, EXCEPTION_HS_TIMEOUT); + } else { + fsm_routine_ready(ctl); + } +} + +static void fsm_routine_start(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd) +{ + struct t7xx_modem *md = ctl->md; + u32 dev_status; + int ret; + + if (!md) + return; + + if (ctl->curr_state != FSM_STATE_INIT && ctl->curr_state != FSM_STATE_PRE_START && + ctl->curr_state != FSM_STATE_STOPPED) { + fsm_finish_command(ctl, cmd, -EINVAL); + return; + } + + ctl->last_state = ctl->curr_state; + ctl->curr_state = FSM_STATE_PRE_START; + t7xx_md_event_notify(md, FSM_PRE_START); + + ret = read_poll_timeout(ioread32, dev_status, + (dev_status & MISC_STAGE_MASK) == LINUX_STAGE, 20000, 2000000, + false, IREG_BASE(md->t7xx_dev) + PCIE_MISC_DEV_STATUS); + if (ret) { + struct device *dev = &md->t7xx_dev->pdev->dev; + + dev_err(dev, "Invalid device status 0x%lx\n", dev_status & MISC_STAGE_MASK); + fsm_finish_command(ctl, cmd, -ETIMEDOUT); + return; + } + + t7xx_cldma_hif_hw_init(md->md_ctrl[ID_CLDMA1]); + fsm_routine_starting(ctl); + fsm_finish_command(ctl, cmd, 0); +} + +static int fsm_main_thread(void *data) +{ + struct t7xx_fsm_ctl *ctl = data; + struct t7xx_fsm_command *cmd; + unsigned long flags; + + while (!kthread_should_stop()) { + if (wait_event_interruptible(ctl->command_wq, !list_empty(&ctl->command_queue) || + kthread_should_stop())) + continue; + + if (kthread_should_stop()) + break; + + spin_lock_irqsave(&ctl->command_lock, flags); + cmd = list_first_entry(&ctl->command_queue, struct t7xx_fsm_command, entry); + list_del(&cmd->entry); + spin_unlock_irqrestore(&ctl->command_lock, flags); + + switch (cmd->cmd_id) { + case FSM_CMD_START: + fsm_routine_start(ctl, cmd); + break; + + case FSM_CMD_EXCEPTION: + fsm_routine_exception(ctl, cmd, FIELD_GET(FSM_CMD_EX_REASON, cmd->flag)); + break; + + case FSM_CMD_PRE_STOP: + fsm_routine_stopping(ctl, cmd); + break; + + case FSM_CMD_STOP: + fsm_routine_stopped(ctl, cmd); + break; + + case FSM_CMD_RECOVER: + fsm_routine_stopped(ctl, cmd); + t7xx_fsm_append_cmd(ctl, FSM_CMD_START, 0); + break; + + default: + fsm_finish_command(ctl, cmd, -EINVAL); + fsm_flush_event_cmd_qs(ctl); + break; + } + } + + return 0; +} + +int t7xx_fsm_append_cmd(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_cmd_state cmd_id, unsigned int flag) +{ + DECLARE_COMPLETION_ONSTACK(done); + struct t7xx_fsm_command *cmd; + unsigned long flags; + int ret; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + INIT_LIST_HEAD(&cmd->entry); + cmd->cmd_id = cmd_id; + cmd->flag = flag; + if (flag & FSM_CMD_FLAG_WAIT_FOR_COMPLETION) { + cmd->done = &done; + cmd->ret = &ret; + } + + spin_lock_irqsave(&ctl->command_lock, flags); + list_add_tail(&cmd->entry, &ctl->command_queue); + spin_unlock_irqrestore(&ctl->command_lock, flags); + + wake_up(&ctl->command_wq); + + if (flag & FSM_CMD_FLAG_WAIT_FOR_COMPLETION) { + unsigned long wait_ret; + + wait_ret = wait_for_completion_timeout(&done, + msecs_to_jiffies(FSM_CMD_TIMEOUT_MS)); + if (!wait_ret) + return -ETIMEDOUT; + + return ret; + } + + return 0; +} + +int t7xx_fsm_append_event(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id, + unsigned char *data, unsigned int length) +{ + struct device *dev = &ctl->md->t7xx_dev->pdev->dev; + struct t7xx_fsm_event *event; + unsigned long flags; + + if (event_id <= FSM_EVENT_INVALID || event_id >= FSM_EVENT_MAX) { + dev_err(dev, "Invalid event %d\n", event_id); + return -EINVAL; + } + + event = kmalloc(sizeof(*event) + length, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); + if (!event) + return -ENOMEM; + + INIT_LIST_HEAD(&event->entry); + event->event_id = event_id; + event->length = length; + + if (data && length) + memcpy((void *)event + sizeof(*event), data, length); + + spin_lock_irqsave(&ctl->event_lock, flags); + list_add_tail(&event->entry, &ctl->event_queue); + spin_unlock_irqrestore(&ctl->event_lock, flags); + wake_up_all(&ctl->event_wq); + return 0; +} + +void t7xx_fsm_clr_event(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id) +{ + struct device *dev = &ctl->md->t7xx_dev->pdev->dev; + struct t7xx_fsm_event *event, *evt_next; + unsigned long flags; + + spin_lock_irqsave(&ctl->event_lock, flags); + list_for_each_entry_safe(event, evt_next, &ctl->event_queue, entry) { + dev_err(dev, "Unhandled event %d\n", event->event_id); + + if (event->event_id == event_id) + fsm_del_kf_event(event); + } + + spin_unlock_irqrestore(&ctl->event_lock, flags); +} + +enum md_state t7xx_fsm_get_md_state(struct t7xx_fsm_ctl *ctl) +{ + if (ctl) + return ctl->md_state; + + return MD_STATE_INVALID; +} + +unsigned int t7xx_fsm_get_ctl_state(struct t7xx_fsm_ctl *ctl) +{ + if (ctl) + return ctl->curr_state; + + return FSM_STATE_STOPPED; +} + +void t7xx_fsm_recv_md_intr(struct t7xx_fsm_ctl *ctl, enum t7xx_md_irq_type type) +{ + if (type == MD_IRQ_PORT_ENUM) { + t7xx_fsm_append_cmd(ctl, FSM_CMD_START, 0); + } else if (type == MD_IRQ_CCIF_EX) { + ctl->exp_flg = true; + wake_up(&ctl->async_hk_wq); + t7xx_fsm_append_cmd(ctl, FSM_CMD_EXCEPTION, + FIELD_PREP(FSM_CMD_EX_REASON, EXCEPTION_EVENT)); + } +} + +void t7xx_fsm_reset(struct t7xx_modem *md) +{ + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + + fsm_flush_event_cmd_qs(ctl); + ctl->last_state = FSM_STATE_INIT; + ctl->curr_state = FSM_STATE_STOPPED; + ctl->exp_flg = false; +} + +int t7xx_fsm_init(struct t7xx_modem *md) +{ + struct device *dev = &md->t7xx_dev->pdev->dev; + struct t7xx_fsm_ctl *ctl; + + ctl = devm_kzalloc(dev, sizeof(*ctl), GFP_KERNEL); + if (!ctl) + return -ENOMEM; + + md->fsm_ctl = ctl; + ctl->md = md; + ctl->last_state = FSM_STATE_INIT; + ctl->curr_state = FSM_STATE_INIT; + INIT_LIST_HEAD(&ctl->command_queue); + INIT_LIST_HEAD(&ctl->event_queue); + init_waitqueue_head(&ctl->async_hk_wq); + init_waitqueue_head(&ctl->event_wq); + INIT_LIST_HEAD(&ctl->notifier_list); + init_waitqueue_head(&ctl->command_wq); + spin_lock_init(&ctl->event_lock); + spin_lock_init(&ctl->command_lock); + ctl->exp_flg = false; + spin_lock_init(&ctl->notifier_lock); + + ctl->fsm_thread = kthread_run(fsm_main_thread, ctl, "t7xx_fsm"); + return PTR_ERR_OR_ZERO(ctl->fsm_thread); +} + +void t7xx_fsm_uninit(struct t7xx_modem *md) +{ + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + + if (!ctl) + return; + + if (ctl->fsm_thread) + kthread_stop(ctl->fsm_thread); + + fsm_flush_event_cmd_qs(ctl); +} diff --git a/drivers/net/wwan/t7xx/t7xx_state_monitor.h b/drivers/net/wwan/t7xx/t7xx_state_monitor.h new file mode 100644 index 000000000000..f1e0b1a3f8de --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_state_monitor.h @@ -0,0 +1,124 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2021, MediaTek Inc. + * Copyright (c) 2021, Intel Corporation. + * + * Authors: + * Amir Hanania + * Haijun Liu + * Moises Veleta + * + * Contributors: + * Eliot Lee + * Ricardo Martinez + * Sreehari Kancharla + */ + +#ifndef __T7XX_MONITOR_H__ +#define __T7XX_MONITOR_H__ + +#include +#include +#include +#include +#include + +#include "t7xx_common.h" +#include "t7xx_modem_ops.h" + +enum t7xx_fsm_state { + FSM_STATE_INIT, + FSM_STATE_PRE_START, + FSM_STATE_STARTING, + FSM_STATE_READY, + FSM_STATE_EXCEPTION, + FSM_STATE_STOPPING, + FSM_STATE_STOPPED, +}; + +enum t7xx_fsm_event_state { + FSM_EVENT_INVALID, + FSM_EVENT_MD_EX, + FSM_EVENT_MD_EX_REC_OK, + FSM_EVENT_MD_EX_PASS, + FSM_EVENT_MAX +}; + +enum t7xx_fsm_cmd_state { + FSM_CMD_INVALID, + FSM_CMD_START, + FSM_CMD_EXCEPTION, + FSM_CMD_PRE_STOP, + FSM_CMD_STOP, + FSM_CMD_RECOVER, +}; + +enum t7xx_ex_reason { + EXCEPTION_HS_TIMEOUT, + EXCEPTION_EVENT, +}; + +enum t7xx_md_irq_type { + MD_IRQ_WDT, + MD_IRQ_CCIF_EX, + MD_IRQ_PORT_ENUM, +}; + +#define FSM_CMD_FLAG_WAIT_FOR_COMPLETION BIT(0) +#define FSM_CMD_FLAG_FLIGHT_MODE BIT(1) +#define FSM_CMD_EX_REASON GENMASK(23, 16) + +struct t7xx_fsm_ctl { + struct t7xx_modem *md; + enum md_state md_state; + unsigned int curr_state; + unsigned int last_state; + struct list_head command_queue; + struct list_head event_queue; + wait_queue_head_t command_wq; + wait_queue_head_t event_wq; + wait_queue_head_t async_hk_wq; + spinlock_t event_lock; /* Protects event queue */ + spinlock_t command_lock; /* Protects command queue */ + struct task_struct *fsm_thread; + bool exp_flg; + spinlock_t notifier_lock; /* Protects notifier list */ + struct list_head notifier_list; +}; + +struct t7xx_fsm_event { + struct list_head entry; + enum t7xx_fsm_event_state event_id; + unsigned int length; +}; + +struct t7xx_fsm_command { + struct list_head entry; + enum t7xx_fsm_cmd_state cmd_id; + unsigned int flag; + struct completion *done; + int *ret; +}; + +struct t7xx_fsm_notifier { + struct list_head entry; + int (*notifier_fn)(enum md_state state, void *data); + void *data; +}; + +int t7xx_fsm_append_cmd(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_cmd_state cmd_id, + unsigned int flag); +int t7xx_fsm_append_event(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id, + unsigned char *data, unsigned int length); +void t7xx_fsm_clr_event(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id); +void t7xx_fsm_broadcast_state(struct t7xx_fsm_ctl *ctl, enum md_state state); +void t7xx_fsm_reset(struct t7xx_modem *md); +int t7xx_fsm_init(struct t7xx_modem *md); +void t7xx_fsm_uninit(struct t7xx_modem *md); +void t7xx_fsm_recv_md_intr(struct t7xx_fsm_ctl *ctl, enum t7xx_md_irq_type type); +enum md_state t7xx_fsm_get_md_state(struct t7xx_fsm_ctl *ctl); +unsigned int t7xx_fsm_get_ctl_state(struct t7xx_fsm_ctl *ctl); +void t7xx_fsm_notifier_register(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier); +void t7xx_fsm_notifier_unregister(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier); + +#endif /* __T7XX_MONITOR_H__ */