From patchwork Fri Feb 28 22:41:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 11413355 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 085251395 for ; Fri, 28 Feb 2020 22:44:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AB995246B6 for ; Fri, 28 Feb 2020 22:44:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="iqg9O/6H" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726880AbgB1WoA (ORCPT ); Fri, 28 Feb 2020 17:44:00 -0500 Received: from mail-yw1-f65.google.com ([209.85.161.65]:35914 "EHLO mail-yw1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726950AbgB1WmS (ORCPT ); Fri, 28 Feb 2020 17:42:18 -0500 Received: by mail-yw1-f65.google.com with SMTP id y72so4964184ywg.3 for ; Fri, 28 Feb 2020 14:42:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ztByHnzYUMZdmRwzBHllgxXTQ466kpKswoRroUwNrEQ=; b=iqg9O/6HmZIalsqkZUbZvforVThMs3gHKiIkDBHuHebbmox9gE8MNMOaIXG76IHcRO sj2yQUbM/noNcUJWhHncWqS4KOkRByjUE4j6KVYuf6ONtQ/DYv5xAzNoHtudAeypgYua wcZAlKdZfk6Et0auvveoYT6IGorGRro9Ou5opoUplkGrHFplRS0SAn+2p6gyeE8Z33Rq k1FsOLzyTeRQ+t9LYLhJ/mRNnZfxagJVqwaB80H30t+caiN55miRBp4N6Wvk/BmnyskI MVxazya5U21cDTXmd422VRNSPpb0dTnByBm7rc3VJcQEk5+WTs1CEzz6Boj9qGxUk7ib 2Ohg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ztByHnzYUMZdmRwzBHllgxXTQ466kpKswoRroUwNrEQ=; b=BmkNhCqhsu9vlRVfbEzy2ZnM74hTrEy3oXw6pMpSD7A8cPOgK/4v29VDkOfd7WZBVw NUPx8H5vlgoemSym6fJoOYfyJkIlia4XcyV1WmCPudBJSwoqfmyyuY/p2RC+2m/tl5SC 6vDr2VRnSbWaAB15GCnxjWFWW48jvkniHyZEXDVJGdKW4wd5k3h/y1Dsu+k4STI7ScgF Zm1Y//4VYOLFDBVXZoMPni+KyXSHAs4AXKREeDh0g4oYAVFYBOkQgX1SSQj25Gfji8xL J6I/db9rD6ddIToqUpXyFVU6ckZi2ycMywFKZAWfNbCNp/AqGms1j6YYczpPBK/QC32/ zvHA== X-Gm-Message-State: APjAAAXlKl5wEEPYxwfkiOsrkZfkEF3ctgKtz/ZDL1ENDsswPmKkGBgX LMr6Rcz8dB7aLNF+oLyGWMKIBA== X-Google-Smtp-Source: APXvYqyjkQjiZEkxPrmpS3By46PGNUa4/DLZ8t9/E/CzVNqzp7fhh2EdQvh/Bgu6UvIjsWqqjdUe8w== X-Received: by 2002:a5b:106:: with SMTP id 6mr6283072ybx.83.1582929735566; Fri, 28 Feb 2020 14:42:15 -0800 (PST) Received: from localhost.localdomain (c-73-185-129-58.hsd1.mn.comcast.net. [73.185.129.58]) by smtp.gmail.com with ESMTPSA id d188sm4637830ywe.50.2020.02.28.14.42.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Feb 2020 14:42:15 -0800 (PST) From: Alex Elder To: Arnd Bergmann , David Miller Cc: Bjorn Andersson , Andy Gross , Johannes Berg , Dan Williams , Evan Green , Eric Caruso , Susheel Yadav Yadagiri , Chaitanya Pratapa , Subash Abhinov Kasiviswanathan , Rob Herring , Mark Rutland , Ohad Ben-Cohen , Siddharth Gupta , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 03/17] soc: qcom: ipa: main code Date: Fri, 28 Feb 2020 16:41:50 -0600 Message-Id: <20200228224204.17746-4-elder@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200228224204.17746-1-elder@linaro.org> References: <20200228224204.17746-1-elder@linaro.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This patch includes three source files that represent some basic "main program" code for the IPA driver. They are: - "ipa.h" defines the top-level IPA structure which represents an IPA device throughout the code. - "ipa_main.c" contains the platform driver probe function, along with some general code used during initialization. - "ipa_reg.h" defines the offsets of the 32-bit registers used for the IPA device, along with masks that define the position and width of fields within these registers. - "version.h" defines some symbolic IPA version numbers. Each file includes some documentation that provides a little more overview of how the code is organized and used. Signed-off-by: Alex Elder --- drivers/net/ipa/ipa.h | 148 ++++++ drivers/net/ipa/ipa_main.c | 954 ++++++++++++++++++++++++++++++++++ drivers/net/ipa/ipa_reg.c | 38 ++ drivers/net/ipa/ipa_reg.h | 476 +++++++++++++++++ drivers/net/ipa/ipa_version.h | 23 + 5 files changed, 1639 insertions(+) create mode 100644 drivers/net/ipa/ipa.h create mode 100644 drivers/net/ipa/ipa_main.c create mode 100644 drivers/net/ipa/ipa_reg.c create mode 100644 drivers/net/ipa/ipa_reg.h create mode 100644 drivers/net/ipa/ipa_version.h diff --git a/drivers/net/ipa/ipa.h b/drivers/net/ipa/ipa.h new file mode 100644 index 000000000000..23fb29889e5a --- /dev/null +++ b/drivers/net/ipa/ipa.h @@ -0,0 +1,148 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2018-2020 Linaro Ltd. + */ +#ifndef _IPA_H_ +#define _IPA_H_ + +#include +#include +#include +#include + +#include "ipa_version.h" +#include "gsi.h" +#include "ipa_mem.h" +#include "ipa_qmi.h" +#include "ipa_endpoint.h" +#include "ipa_interrupt.h" + +struct clk; +struct icc_path; +struct net_device; +struct platform_device; + +struct ipa_clock; +struct ipa_smp2p; +struct ipa_interrupt; + +/** + * struct ipa - IPA information + * @gsi: Embedded GSI structure + * @version: IPA hardware version + * @pdev: Platform device + * @modem_rproc: Remoteproc handle for modem subsystem + * @smp2p: SMP2P information + * @clock: IPA clocking information + * @suspend_ref: Whether clock reference preventing suspend taken + * @table_addr: DMA address of filter/route table content + * @table_virt: Virtual address of filter/route table content + * @interrupt: IPA Interrupt information + * @uc_loaded: true after microcontroller has reported it's ready + * @reg_addr: DMA address used for IPA register access + * @reg_virt: Virtual address used for IPA register access + * @mem_addr: DMA address of IPA-local memory space + * @mem_virt: Virtual address of IPA-local memory space + * @mem_offset: Offset from @mem_virt used for access to IPA memory + * @mem_size: Total size (bytes) of memory at @mem_virt + * @mem: Array of IPA-local memory region descriptors + * @zero_addr: DMA address of preallocated zero-filled memory + * @zero_virt: Virtual address of preallocated zero-filled memory + * @zero_size: Size (bytes) of preallocated zero-filled memory + * @wakeup_source: Wakeup source information + * @available: Bit mask indicating endpoints hardware supports + * @filter_map: Bit mask indicating endpoints that support filtering + * @initialized: Bit mask indicating endpoints initialized + * @set_up: Bit mask indicating endpoints set up + * @enabled: Bit mask indicating endpoints enabled + * @endpoint: Array of endpoint information + * @channel_map: Mapping of GSI channel to IPA endpoint + * @name_map: Mapping of IPA endpoint name to IPA endpoint + * @setup_complete: Flag indicating whether setup stage has completed + * @modem_state: State of modem (stopped, running) + * @modem_netdev: Network device structure used for modem + * @qmi: QMI information + */ +struct ipa { + struct gsi gsi; + enum ipa_version version; + struct platform_device *pdev; + struct rproc *modem_rproc; + struct ipa_smp2p *smp2p; + struct ipa_clock *clock; + atomic_t suspend_ref; + + dma_addr_t table_addr; + __le64 *table_virt; + + struct ipa_interrupt *interrupt; + bool uc_loaded; + + dma_addr_t reg_addr; + void __iomem *reg_virt; + + dma_addr_t mem_addr; + void *mem_virt; + u32 mem_offset; + u32 mem_size; + const struct ipa_mem *mem; + + dma_addr_t zero_addr; + void *zero_virt; + size_t zero_size; + + struct wakeup_source *wakeup_source; + + /* Bit masks indicating endpoint state */ + u32 available; /* supported by hardware */ + u32 filter_map; + u32 initialized; + u32 set_up; + u32 enabled; + + struct ipa_endpoint endpoint[IPA_ENDPOINT_MAX]; + struct ipa_endpoint *channel_map[GSI_CHANNEL_COUNT_MAX]; + struct ipa_endpoint *name_map[IPA_ENDPOINT_COUNT]; + + bool setup_complete; + + atomic_t modem_state; /* enum ipa_modem_state */ + struct net_device *modem_netdev; + struct ipa_qmi qmi; +}; + +/** + * ipa_setup() - Perform IPA setup + * @ipa: IPA pointer + * + * IPA initialization is broken into stages: init; config; and setup. + * (These have inverses exit, deconfig, and teardown.) + * + * Activities performed at the init stage can be done without requiring + * any access to IPA hardware. Activities performed at the config stage + * require the IPA clock to be running, because they involve access + * to IPA registers. The setup stage is performed only after the GSI + * hardware is ready (more on this below). The setup stage allows + * the AP to perform more complex initialization by issuing "immediate + * commands" using a special interface to the IPA. + * + * This function, @ipa_setup(), starts the setup stage. + * + * In order for the GSI hardware to be functional it needs firmware to be + * loaded (in addition to some other low-level initialization). This early + * GSI initialization can be done either by Trust Zone on the AP or by the + * modem. + * + * If it's done by Trust Zone, the AP loads the GSI firmware and supplies + * it to Trust Zone to verify and install. When this completes, if + * verification was successful, the GSI layer is ready and ipa_setup() + * implements the setup phase of initialization. + * + * If the modem performs early GSI initialization, the AP needs to know + * when this has occurred. An SMP2P interrupt is used for this purpose, + * and receipt of that interrupt triggers the call to ipa_setup(). + */ +int ipa_setup(struct ipa *ipa); + +#endif /* _IPA_H_ */ diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c new file mode 100644 index 000000000000..d6e7f257e99d --- /dev/null +++ b/drivers/net/ipa/ipa_main.c @@ -0,0 +1,954 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2018-2020 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ipa.h" +#include "ipa_clock.h" +#include "ipa_data.h" +#include "ipa_endpoint.h" +#include "ipa_cmd.h" +#include "ipa_reg.h" +#include "ipa_mem.h" +#include "ipa_table.h" +#include "ipa_modem.h" +#include "ipa_uc.h" +#include "ipa_interrupt.h" +#include "gsi_trans.h" + +/** + * DOC: The IP Accelerator + * + * This driver supports the Qualcomm IP Accelerator (IPA), which is a + * networking component found in many Qualcomm SoCs. The IPA is connected + * to the application processor (AP), but is also connected (and partially + * controlled by) other "execution environments" (EEs), such as a modem. + * + * The IPA is the conduit between the AP and the modem that carries network + * traffic. This driver presents a network interface representing the + * connection of the modem to external (e.g. LTE) networks. + * + * The IPA provides protocol checksum calculation, offloading this work + * from the AP. The IPA offers additional functionality, including routing, + * filtering, and NAT support, but that more advanced functionality is not + * currently supported. Despite that, some resources--including routing + * tables and filter tables--are defined in this driver because they must + * be initialized even when the advanced hardware features are not used. + * + * There are two distinct layers that implement the IPA hardware, and this + * is reflected in the organization of the driver. The generic software + * interface (GSI) is an integral component of the IPA, providing a + * well-defined communication layer between the AP subsystem and the IPA + * core. The GSI implements a set of "channels" used for communication + * between the AP and the IPA. + * + * The IPA layer uses GSI channels to implement its "endpoints". And while + * a GSI channel carries data between the AP and the IPA, a pair of IPA + * endpoints is used to carry traffic between two EEs. Specifically, the main + * modem network interface is implemented by two pairs of endpoints: a TX + * endpoint on the AP coupled with an RX endpoint on the modem; and another + * RX endpoint on the AP receiving data from a TX endpoint on the modem. + */ + +/* The name of the GSI firmware file relative to /lib/firmware */ +#define IPA_FWS_PATH "ipa_fws.mdt" +#define IPA_PAS_ID 15 + +/** + * ipa_suspend_handler() - Handle the suspend IPA interrupt + * @ipa: IPA pointer + * @irq_id: IPA interrupt type (unused) + * + * When in suspended state, the IPA can trigger a resume by sending a SUSPEND + * IPA interrupt. + */ +static void ipa_suspend_handler(struct ipa *ipa, enum ipa_irq_id irq_id) +{ + /* Take a a single clock reference to prevent suspend. All + * endpoints will be resumed as a result. This reference will + * be dropped when we get a power management suspend request. + */ + if (!atomic_xchg(&ipa->suspend_ref, 1)) + ipa_clock_get(ipa); + + /* Acknowledge/clear the suspend interrupt on all endpoints */ + ipa_interrupt_suspend_clear_all(ipa->interrupt); +} + +/** + * ipa_setup() - Set up IPA hardware + * @ipa: IPA pointer + * + * Perform initialization that requires issuing immediate commands on + * the command TX endpoint. If the modem is doing GSI firmware load + * and initialization, this function will be called when an SMP2P + * interrupt has been signaled by the modem. Otherwise it will be + * called from ipa_probe() after GSI firmware has been successfully + * loaded, authenticated, and started by Trust Zone. + */ +int ipa_setup(struct ipa *ipa) +{ + struct ipa_endpoint *exception_endpoint; + struct ipa_endpoint *command_endpoint; + int ret; + + /* IPA v4.0 and above don't use the doorbell engine. */ + ret = gsi_setup(&ipa->gsi, ipa->version == IPA_VERSION_3_5_1); + if (ret) + return ret; + + ipa->interrupt = ipa_interrupt_setup(ipa); + if (IS_ERR(ipa->interrupt)) { + ret = PTR_ERR(ipa->interrupt); + goto err_gsi_teardown; + } + ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND, + ipa_suspend_handler); + + ipa_uc_setup(ipa); + + ipa_endpoint_setup(ipa); + + /* We need to use the AP command TX endpoint to perform other + * initialization, so we enable first. + */ + command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX]; + ret = ipa_endpoint_enable_one(command_endpoint); + if (ret) + goto err_endpoint_teardown; + + ret = ipa_mem_setup(ipa); + if (ret) + goto err_command_disable; + + ret = ipa_table_setup(ipa); + if (ret) + goto err_mem_teardown; + + /* Enable the exception handling endpoint, and tell the hardware + * to use it by default. + */ + exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX]; + ret = ipa_endpoint_enable_one(exception_endpoint); + if (ret) + goto err_table_teardown; + + ipa_endpoint_default_route_set(ipa, exception_endpoint->endpoint_id); + + /* We're all set. Now prepare for communication with the modem */ + ret = ipa_modem_setup(ipa); + if (ret) + goto err_default_route_clear; + + ipa->setup_complete = true; + + dev_info(&ipa->pdev->dev, "IPA driver setup completed successfully\n"); + + return 0; + +err_default_route_clear: + ipa_endpoint_default_route_clear(ipa); + ipa_endpoint_disable_one(exception_endpoint); +err_table_teardown: + ipa_table_teardown(ipa); +err_mem_teardown: + ipa_mem_teardown(ipa); +err_command_disable: + ipa_endpoint_disable_one(command_endpoint); +err_endpoint_teardown: + ipa_endpoint_teardown(ipa); + ipa_uc_teardown(ipa); + ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND); + ipa_interrupt_teardown(ipa->interrupt); +err_gsi_teardown: + gsi_teardown(&ipa->gsi); + + return ret; +} + +/** + * ipa_teardown() - Inverse of ipa_setup() + * @ipa: IPA pointer + */ +static void ipa_teardown(struct ipa *ipa) +{ + struct ipa_endpoint *exception_endpoint; + struct ipa_endpoint *command_endpoint; + + ipa_modem_teardown(ipa); + ipa_endpoint_default_route_clear(ipa); + exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX]; + ipa_endpoint_disable_one(exception_endpoint); + ipa_table_teardown(ipa); + ipa_mem_teardown(ipa); + command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX]; + ipa_endpoint_disable_one(command_endpoint); + ipa_endpoint_teardown(ipa); + ipa_uc_teardown(ipa); + ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND); + ipa_interrupt_teardown(ipa->interrupt); + gsi_teardown(&ipa->gsi); +} + +/* Configure QMB Core Master Port selection */ +static void ipa_hardware_config_comp(struct ipa *ipa) +{ + u32 val; + + /* Nothing to configure for IPA v3.5.1 */ + if (ipa->version == IPA_VERSION_3_5_1) + return; + + val = ioread32(ipa->reg_virt + IPA_REG_COMP_CFG_OFFSET); + + if (ipa->version == IPA_VERSION_4_0) { + val &= ~IPA_QMB_SELECT_CONS_EN_FMASK; + val &= ~IPA_QMB_SELECT_PROD_EN_FMASK; + val &= ~IPA_QMB_SELECT_GLOBAL_EN_FMASK; + } else { + val |= GSI_MULTI_AXI_MASTERS_DIS_FMASK; + } + + val |= GSI_MULTI_INORDER_RD_DIS_FMASK; + val |= GSI_MULTI_INORDER_WR_DIS_FMASK; + + iowrite32(val, ipa->reg_virt + IPA_REG_COMP_CFG_OFFSET); +} + +/* Configure DDR and PCIe max read/write QSB values */ +static void ipa_hardware_config_qsb(struct ipa *ipa) +{ + u32 val; + + /* QMB_0 represents DDR; QMB_1 represents PCIe (not present in 4.2) */ + val = u32_encode_bits(8, GEN_QMB_0_MAX_WRITES_FMASK); + if (ipa->version == IPA_VERSION_4_2) + val |= u32_encode_bits(0, GEN_QMB_1_MAX_WRITES_FMASK); + else + val |= u32_encode_bits(4, GEN_QMB_1_MAX_WRITES_FMASK); + iowrite32(val, ipa->reg_virt + IPA_REG_QSB_MAX_WRITES_OFFSET); + + if (ipa->version == IPA_VERSION_3_5_1) { + val = u32_encode_bits(8, GEN_QMB_0_MAX_READS_FMASK); + val |= u32_encode_bits(12, GEN_QMB_1_MAX_READS_FMASK); + } else { + val = u32_encode_bits(12, GEN_QMB_0_MAX_READS_FMASK); + if (ipa->version == IPA_VERSION_4_2) + val |= u32_encode_bits(0, GEN_QMB_1_MAX_READS_FMASK); + else + val |= u32_encode_bits(12, GEN_QMB_1_MAX_READS_FMASK); + /* GEN_QMB_0_MAX_READS_BEATS is 0 */ + /* GEN_QMB_1_MAX_READS_BEATS is 0 */ + } + iowrite32(val, ipa->reg_virt + IPA_REG_QSB_MAX_READS_OFFSET); +} + +static void ipa_idle_indication_cfg(struct ipa *ipa, + u32 enter_idle_debounce_thresh, + bool const_non_idle_enable) +{ + u32 offset; + u32 val; + + val = u32_encode_bits(enter_idle_debounce_thresh, + ENTER_IDLE_DEBOUNCE_THRESH_FMASK); + if (const_non_idle_enable) + val |= CONST_NON_IDLE_ENABLE_FMASK; + + offset = ipa_reg_idle_indication_cfg_offset(ipa->version); + iowrite32(val, ipa->reg_virt + offset); +} + +/** + * ipa_hardware_dcd_config() - Enable dynamic clock division on IPA + * + * Configures when the IPA signals it is idle to the global clock + * controller, which can respond by scalling down the clock to + * save power. + */ +static void ipa_hardware_dcd_config(struct ipa *ipa) +{ + /* Recommended values for IPA 3.5 according to IPA HPG */ + ipa_idle_indication_cfg(ipa, 256, false); +} + +static void ipa_hardware_dcd_deconfig(struct ipa *ipa) +{ + /* Power-on reset values */ + ipa_idle_indication_cfg(ipa, 0, true); +} + +/** + * ipa_hardware_config() - Primitive hardware initialization + * @ipa: IPA pointer + */ +static void ipa_hardware_config(struct ipa *ipa) +{ + u32 granularity; + u32 val; + + /* Fill in backward-compatibility register, based on version */ + val = ipa_reg_bcr_val(ipa->version); + iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET); + + if (ipa->version != IPA_VERSION_3_5_1) { + /* Enable open global clocks (hardware workaround) */ + val = GLOBAL_FMASK; + val |= GLOBAL_2X_CLK_FMASK; + iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET); + + /* Disable PA mask to allow HOLB drop (hardware workaround) */ + val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET); + val &= ~PA_MASK_EN; + iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET); + } + + ipa_hardware_config_comp(ipa); + + /* Configure system bus limits */ + ipa_hardware_config_qsb(ipa); + + /* Configure aggregation granularity */ + val = ioread32(ipa->reg_virt + IPA_REG_COUNTER_CFG_OFFSET); + granularity = ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY); + val = u32_encode_bits(granularity, AGGR_GRANULARITY); + iowrite32(val, ipa->reg_virt + IPA_REG_COUNTER_CFG_OFFSET); + + /* Disable hashed IPv4 and IPv6 routing and filtering for IPA v4.2 */ + if (ipa->version == IPA_VERSION_4_2) + iowrite32(0, ipa->reg_virt + IPA_REG_FILT_ROUT_HASH_EN_OFFSET); + + /* Enable dynamic clock division */ + ipa_hardware_dcd_config(ipa); +} + +/** + * ipa_hardware_deconfig() - Inverse of ipa_hardware_config() + * @ipa: IPA pointer + * + * This restores the power-on reset values (even if they aren't different) + */ +static void ipa_hardware_deconfig(struct ipa *ipa) +{ + /* Mostly we just leave things as we set them. */ + ipa_hardware_dcd_deconfig(ipa); +} + +#ifdef IPA_VALIDATION + +/* # IPA resources used based on version (see IPA_RESOURCE_GROUP_COUNT) */ +static int ipa_resource_group_count(struct ipa *ipa) +{ + switch (ipa->version) { + case IPA_VERSION_3_5_1: + return 3; + + case IPA_VERSION_4_0: + case IPA_VERSION_4_1: + return 4; + + case IPA_VERSION_4_2: + return 1; + + default: + return 0; + } +} + +static bool ipa_resource_limits_valid(struct ipa *ipa, + const struct ipa_resource_data *data) +{ + u32 group_count = ipa_resource_group_count(ipa); + u32 i; + u32 j; + + if (!group_count) + return false; + + /* Return an error if a non-zero resource group limit is specified + * for a resource not supported by hardware. + */ + for (i = 0; i < data->resource_src_count; i++) { + const struct ipa_resource_src *resource; + + resource = &data->resource_src[i]; + for (j = group_count; j < IPA_RESOURCE_GROUP_COUNT; j++) + if (resource->limits[j].min || resource->limits[j].max) + return false; + } + + for (i = 0; i < data->resource_dst_count; i++) { + const struct ipa_resource_dst *resource; + + resource = &data->resource_dst[i]; + for (j = group_count; j < IPA_RESOURCE_GROUP_COUNT; j++) + if (resource->limits[j].min || resource->limits[j].max) + return false; + } + + return true; +} + +#else /* !IPA_VALIDATION */ + +static bool ipa_resource_limits_valid(struct ipa *ipa, + const struct ipa_resource_data *data) +{ + return true; +} + +#endif /* !IPA_VALIDATION */ + +static void +ipa_resource_config_common(struct ipa *ipa, u32 offset, + const struct ipa_resource_limits *xlimits, + const struct ipa_resource_limits *ylimits) +{ + u32 val; + + val = u32_encode_bits(xlimits->min, X_MIN_LIM_FMASK); + val |= u32_encode_bits(xlimits->max, X_MAX_LIM_FMASK); + val |= u32_encode_bits(ylimits->min, Y_MIN_LIM_FMASK); + val |= u32_encode_bits(ylimits->max, Y_MAX_LIM_FMASK); + + iowrite32(val, ipa->reg_virt + offset); +} + +static void ipa_resource_config_src_01(struct ipa *ipa, + const struct ipa_resource_src *resource) +{ + u32 offset = IPA_REG_SRC_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(resource->type); + + ipa_resource_config_common(ipa, offset, + &resource->limits[0], &resource->limits[1]); +} + +static void ipa_resource_config_src_23(struct ipa *ipa, + const struct ipa_resource_src *resource) +{ + u32 offset = IPA_REG_SRC_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(resource->type); + + ipa_resource_config_common(ipa, offset, + &resource->limits[2], &resource->limits[3]); +} + +static void ipa_resource_config_dst_01(struct ipa *ipa, + const struct ipa_resource_dst *resource) +{ + u32 offset = IPA_REG_DST_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(resource->type); + + ipa_resource_config_common(ipa, offset, + &resource->limits[0], &resource->limits[1]); +} + +static void ipa_resource_config_dst_23(struct ipa *ipa, + const struct ipa_resource_dst *resource) +{ + u32 offset = IPA_REG_DST_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(resource->type); + + ipa_resource_config_common(ipa, offset, + &resource->limits[2], &resource->limits[3]); +} + +static int +ipa_resource_config(struct ipa *ipa, const struct ipa_resource_data *data) +{ + u32 i; + + if (!ipa_resource_limits_valid(ipa, data)) + return -EINVAL; + + for (i = 0; i < data->resource_src_count; i++) { + ipa_resource_config_src_01(ipa, &data->resource_src[i]); + ipa_resource_config_src_23(ipa, &data->resource_src[i]); + } + + for (i = 0; i < data->resource_dst_count; i++) { + ipa_resource_config_dst_01(ipa, &data->resource_dst[i]); + ipa_resource_config_dst_23(ipa, &data->resource_dst[i]); + } + + return 0; +} + +static void ipa_resource_deconfig(struct ipa *ipa) +{ + /* Nothing to do */ +} + +/** + * ipa_config() - Configure IPA hardware + * @ipa: IPA pointer + * + * Perform initialization requiring IPA clock to be enabled. + */ +static int ipa_config(struct ipa *ipa, const struct ipa_data *data) +{ + int ret; + + /* Get a clock reference to allow initialization. This reference + * is held after initialization completes, and won't get dropped + * unless/until a system suspend request arrives. + */ + atomic_set(&ipa->suspend_ref, 1); + ipa_clock_get(ipa); + + ipa_hardware_config(ipa); + + ret = ipa_endpoint_config(ipa); + if (ret) + goto err_hardware_deconfig; + + ret = ipa_mem_config(ipa); + if (ret) + goto err_endpoint_deconfig; + + ipa_table_config(ipa); + + /* Assign resource limitation to each group */ + ret = ipa_resource_config(ipa, data->resource_data); + if (ret) + goto err_table_deconfig; + + ret = ipa_modem_config(ipa); + if (ret) + goto err_resource_deconfig; + + return 0; + +err_resource_deconfig: + ipa_resource_deconfig(ipa); +err_table_deconfig: + ipa_table_deconfig(ipa); + ipa_mem_deconfig(ipa); +err_endpoint_deconfig: + ipa_endpoint_deconfig(ipa); +err_hardware_deconfig: + ipa_hardware_deconfig(ipa); + ipa_clock_put(ipa); + atomic_set(&ipa->suspend_ref, 0); + + return ret; +} + +/** + * ipa_deconfig() - Inverse of ipa_config() + * @ipa: IPA pointer + */ +static void ipa_deconfig(struct ipa *ipa) +{ + ipa_modem_deconfig(ipa); + ipa_resource_deconfig(ipa); + ipa_table_deconfig(ipa); + ipa_mem_deconfig(ipa); + ipa_endpoint_deconfig(ipa); + ipa_hardware_deconfig(ipa); + ipa_clock_put(ipa); + atomic_set(&ipa->suspend_ref, 0); +} + +static int ipa_firmware_load(struct device *dev) +{ + const struct firmware *fw; + struct device_node *node; + struct resource res; + phys_addr_t phys; + ssize_t size; + void *virt; + int ret; + + node = of_parse_phandle(dev->of_node, "memory-region", 0); + if (!node) { + dev_err(dev, "DT error getting \"memory-region\" property\n"); + return -EINVAL; + } + + ret = of_address_to_resource(node, 0, &res); + if (ret) { + dev_err(dev, "error %d getting \"memory-region\" resource\n", + ret); + return ret; + } + + ret = request_firmware(&fw, IPA_FWS_PATH, dev); + if (ret) { + dev_err(dev, "error %d requesting \"%s\"\n", ret, IPA_FWS_PATH); + return ret; + } + + phys = res.start; + size = (size_t)resource_size(&res); + virt = memremap(phys, size, MEMREMAP_WC); + if (!virt) { + dev_err(dev, "unable to remap firmware memory\n"); + ret = -ENOMEM; + goto out_release_firmware; + } + + ret = qcom_mdt_load(dev, fw, IPA_FWS_PATH, IPA_PAS_ID, + virt, phys, size, NULL); + if (ret) + dev_err(dev, "error %d loading \"%s\"\n", ret, IPA_FWS_PATH); + else if ((ret = qcom_scm_pas_auth_and_reset(IPA_PAS_ID))) + dev_err(dev, "error %d authenticating \"%s\"\n", ret, + IPA_FWS_PATH); + + memunmap(virt); +out_release_firmware: + release_firmware(fw); + + return ret; +} + +static const struct of_device_id ipa_match[] = { + { + .compatible = "qcom,sdm845-ipa", + .data = &ipa_data_sdm845, + }, + { + .compatible = "qcom,sc7180-ipa", + .data = &ipa_data_sc7180, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, ipa_match); + +static phandle of_property_read_phandle(const struct device_node *np, + const char *name) +{ + struct property *prop; + int len = 0; + + prop = of_find_property(np, name, &len); + if (!prop || len != sizeof(__be32)) + return 0; + + return be32_to_cpup(prop->value); +} + +/* Check things that can be validated at build time. This just + * groups these things BUILD_BUG_ON() calls don't clutter the rest + * of the code. + * */ +static void ipa_validate_build(void) +{ +#ifdef IPA_VALIDATE + /* We assume we're working on 64-bit hardware */ + BUILD_BUG_ON(!IS_ENABLED(CONFIG_64BIT)); + + /* Code assumes the EE ID for the AP is 0 (zeroed structure field) */ + BUILD_BUG_ON(GSI_EE_AP != 0); + + /* There's no point if we have no channels or event rings */ + BUILD_BUG_ON(!GSI_CHANNEL_COUNT_MAX); + BUILD_BUG_ON(!GSI_EVT_RING_COUNT_MAX); + + /* GSI hardware design limits */ + BUILD_BUG_ON(GSI_CHANNEL_COUNT_MAX > 32); + BUILD_BUG_ON(GSI_EVT_RING_COUNT_MAX > 31); + + /* The number of TREs in a transaction is limited by the channel's + * TLV FIFO size. A transaction structure uses 8-bit fields + * to represents the number of TREs it has allocated and used. + */ + BUILD_BUG_ON(GSI_TLV_MAX > U8_MAX); + + /* Exceeding 128 bytes makes the transaction pool *much* larger */ + BUILD_BUG_ON(sizeof(struct gsi_trans) > 128); + + /* This is used as a divisor */ + BUILD_BUG_ON(!IPA_AGGR_GRANULARITY); +#endif /* IPA_VALIDATE */ +} + +/** + * ipa_probe() - IPA platform driver probe function + * @pdev: Platform device pointer + * + * @Return: 0 if successful, or a negative error code (possibly + * EPROBE_DEFER) + * + * This is the main entry point for the IPA driver. Initialization proceeds + * in several stages: + * - The "init" stage involves activities that can be initialized without + * access to the IPA hardware. + * - The "config" stage requires the IPA clock to be active so IPA registers + * can be accessed, but does not require the use of IPA immediate commands. + * - The "setup" stage uses IPA immediate commands, and so requires the GSI + * layer to be initialized. + * + * A Boolean Device Tree "modem-init" property determines whether GSI + * initialization will be performed by the AP (Trust Zone) or the modem. + * If the AP does GSI initialization, the setup phase is entered after + * this has completed successfully. Otherwise the modem initializes + * the GSI layer and signals it has finished by sending an SMP2P interrupt + * to the AP; this triggers the start if IPA setup. + */ +static int ipa_probe(struct platform_device *pdev) +{ + struct wakeup_source *wakeup_source; + struct device *dev = &pdev->dev; + const struct ipa_data *data; + struct ipa_clock *clock; + struct rproc *rproc; + bool modem_alloc; + bool modem_init; + struct ipa *ipa; + phandle phandle; + bool prefetch; + int ret; + + ipa_validate_build(); + + /* If we need Trust Zone, make sure it's available */ + modem_init = of_property_read_bool(dev->of_node, "modem-init"); + if (!modem_init) + if (!qcom_scm_is_available()) + return -EPROBE_DEFER; + + /* We rely on remoteproc to tell us about modem state changes */ + phandle = of_property_read_phandle(dev->of_node, "modem-remoteproc"); + if (!phandle) { + dev_err(dev, "DT missing \"modem-remoteproc\" property\n"); + return -EINVAL; + } + + rproc = rproc_get_by_phandle(phandle); + if (!rproc) + return -EPROBE_DEFER; + + /* The clock and interconnects might not be ready when we're + * probed, so might return -EPROBE_DEFER. + */ + clock = ipa_clock_init(dev); + if (IS_ERR(clock)) { + ret = PTR_ERR(clock); + goto err_rproc_put; + } + + /* No more EPROBE_DEFER. Get our configuration data */ + data = of_device_get_match_data(dev); + if (!data) { + /* This is really IPA_VALIDATE (should never happen) */ + dev_err(dev, "matched hardware not supported\n"); + ret = -ENOTSUPP; + goto err_clock_exit; + } + + /* Create a wakeup source. */ + wakeup_source = wakeup_source_register(dev, "ipa"); + if (!wakeup_source) { + /* The most likely reason for failure is memory exhaustion */ + ret = -ENOMEM; + goto err_clock_exit; + } + + /* Allocate and initialize the IPA structure */ + ipa = kzalloc(sizeof(*ipa), GFP_KERNEL); + if (!ipa) { + ret = -ENOMEM; + goto err_wakeup_source_unregister; + } + + ipa->pdev = pdev; + dev_set_drvdata(dev, ipa); + ipa->modem_rproc = rproc; + ipa->clock = clock; + atomic_set(&ipa->suspend_ref, 0); + ipa->wakeup_source = wakeup_source; + ipa->version = data->version; + + ret = ipa_reg_init(ipa); + if (ret) + goto err_kfree_ipa; + + ret = ipa_mem_init(ipa, data->mem_count, data->mem_data); + if (ret) + goto err_reg_exit; + + /* GSI v2.0+ (IPA v4.0+) uses prefetch for the command channel */ + prefetch = ipa->version != IPA_VERSION_3_5_1; + /* IPA v4.2 requires the AP to allocate channels for the modem */ + modem_alloc = ipa->version == IPA_VERSION_4_2; + + ret = gsi_init(&ipa->gsi, pdev, prefetch, data->endpoint_count, + data->endpoint_data, modem_alloc); + if (ret) + goto err_mem_exit; + + /* Result is a non-zero mask endpoints that support filtering */ + ipa->filter_map = ipa_endpoint_init(ipa, data->endpoint_count, + data->endpoint_data); + if (!ipa->filter_map) { + ret = -EINVAL; + goto err_gsi_exit; + } + + ret = ipa_table_init(ipa); + if (ret) + goto err_endpoint_exit; + + ret = ipa_modem_init(ipa, modem_init); + if (ret) + goto err_table_exit; + + ret = ipa_config(ipa, data); + if (ret) + goto err_modem_exit; + + dev_info(dev, "IPA driver initialized"); + + /* If the modem is doing early initialization, it will trigger a + * call to ipa_setup() call when it has finished. In that case + * we're done here. + */ + if (modem_init) + return 0; + + /* Otherwise we need to load the firmware and have Trust Zone validate + * and install it. If that succeeds we can proceed with setup. + */ + ret = ipa_firmware_load(dev); + if (ret) + goto err_deconfig; + + ret = ipa_setup(ipa); + if (ret) + goto err_deconfig; + + return 0; + +err_deconfig: + ipa_deconfig(ipa); +err_modem_exit: + ipa_modem_exit(ipa); +err_table_exit: + ipa_table_exit(ipa); +err_endpoint_exit: + ipa_endpoint_exit(ipa); +err_gsi_exit: + gsi_exit(&ipa->gsi); +err_mem_exit: + ipa_mem_exit(ipa); +err_reg_exit: + ipa_reg_exit(ipa); +err_kfree_ipa: + kfree(ipa); +err_wakeup_source_unregister: + wakeup_source_unregister(wakeup_source); +err_clock_exit: + ipa_clock_exit(clock); +err_rproc_put: + rproc_put(rproc); + + return ret; +} + +static int ipa_remove(struct platform_device *pdev) +{ + struct ipa *ipa = dev_get_drvdata(&pdev->dev); + struct rproc *rproc = ipa->modem_rproc; + struct ipa_clock *clock = ipa->clock; + struct wakeup_source *wakeup_source; + int ret; + + wakeup_source = ipa->wakeup_source; + + if (ipa->setup_complete) { + ret = ipa_modem_stop(ipa); + if (ret) + return ret; + + ipa_teardown(ipa); + } + + ipa_deconfig(ipa); + ipa_modem_exit(ipa); + ipa_table_exit(ipa); + ipa_endpoint_exit(ipa); + gsi_exit(&ipa->gsi); + ipa_mem_exit(ipa); + ipa_reg_exit(ipa); + kfree(ipa); + wakeup_source_unregister(wakeup_source); + ipa_clock_exit(clock); + rproc_put(rproc); + + return 0; +} + +/** + * ipa_suspend() - Power management system suspend callback + * @dev: IPA device structure + * + * @Return: Zero + * + * Called by the PM framework when a system suspend operation is invoked. + */ +static int ipa_suspend(struct device *dev) +{ + struct ipa *ipa = dev_get_drvdata(dev); + + ipa_clock_put(ipa); + atomic_set(&ipa->suspend_ref, 0); + + return 0; +} + +/** + * ipa_resume() - Power management system resume callback + * @dev: IPA device structure + * + * @Return: Always returns 0 + * + * Called by the PM framework when a system resume operation is invoked. + */ +static int ipa_resume(struct device *dev) +{ + struct ipa *ipa = dev_get_drvdata(dev); + + /* This clock reference will keep the IPA out of suspend + * until we get a power management suspend request. + */ + atomic_set(&ipa->suspend_ref, 1); + ipa_clock_get(ipa); + + return 0; +} + +static const struct dev_pm_ops ipa_pm_ops = { + .suspend_noirq = ipa_suspend, + .resume_noirq = ipa_resume, +}; + +static struct platform_driver ipa_driver = { + .probe = ipa_probe, + .remove = ipa_remove, + .driver = { + .name = "ipa", + .owner = THIS_MODULE, + .pm = &ipa_pm_ops, + .of_match_table = ipa_match, + }, +}; + +module_platform_driver(ipa_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Qualcomm IP Accelerator device driver"); diff --git a/drivers/net/ipa/ipa_reg.c b/drivers/net/ipa/ipa_reg.c new file mode 100644 index 000000000000..e6147a1cd787 --- /dev/null +++ b/drivers/net/ipa/ipa_reg.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2019-2020 Linaro Ltd. + */ + +#include + +#include "ipa.h" +#include "ipa_reg.h" + +int ipa_reg_init(struct ipa *ipa) +{ + struct device *dev = &ipa->pdev->dev; + struct resource *res; + + /* Setup IPA register memory */ + res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM, + "ipa-reg"); + if (!res) { + dev_err(dev, "DT error getting \"ipa-reg\" memory property\n"); + return -ENODEV; + } + + ipa->reg_virt = ioremap(res->start, resource_size(res)); + if (!ipa->reg_virt) { + dev_err(dev, "unable to remap \"ipa-reg\" memory\n"); + return -ENOMEM; + } + ipa->reg_addr = res->start; + + return 0; +} + +void ipa_reg_exit(struct ipa *ipa) +{ + iounmap(ipa->reg_virt); +} diff --git a/drivers/net/ipa/ipa_reg.h b/drivers/net/ipa/ipa_reg.h new file mode 100644 index 000000000000..3b8106aa277a --- /dev/null +++ b/drivers/net/ipa/ipa_reg.h @@ -0,0 +1,476 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2018-2020 Linaro Ltd. + */ +#ifndef _IPA_REG_H_ +#define _IPA_REG_H_ + +#include + +#include "ipa_version.h" + +struct ipa; + +/** + * DOC: IPA Registers + * + * IPA registers are located within the "ipa-reg" address space defined by + * Device Tree. The offset of each register within that space is specified + * by symbols defined below. The address space is mapped to virtual memory + * space in ipa_mem_init(). All IPA registers are 32 bits wide. + * + * Certain register types are duplicated for a number of instances of + * something. For example, each IPA endpoint has an set of registers + * defining its configuration. The offset to an endpoint's set of registers + * is computed based on an "base" offset, plus an endpoint's ID multiplied + * and a "stride" value for the register. For such registers, the offset is + * computed by a function-like macro that takes a parameter used in the + * computation. + * + * Some register offsets depend on execution environment. For these an "ee" + * parameter is supplied to the offset macro. The "ee" value is a member of + * the gsi_ee enumerated type. + * + * The offset of a register dependent on endpoint id is computed by a macro + * that is supplied a parameter "ep". The "ep" value is assumed to be less + * than the maximum endpoint value for the current hardware, and that will + * not exceed IPA_ENDPOINT_MAX. + * + * The offset of registers related to filter and route tables is computed + * by a macro that is supplied a parameter "er". The "er" represents an + * endpoint ID for filters, or a route ID for routes. For filters, the + * endpoint ID must be less than IPA_ENDPOINT_MAX, but is further restricted + * because not all endpoints support filtering. For routes, the route ID + * must be less than IPA_ROUTE_MAX. + * + * The offset of registers related to resource types is computed by a macro + * that is supplied a parameter "rt". The "rt" represents a resource type, + * which is is a member of the ipa_resource_type_src enumerated type for + * source endpoint resources or the ipa_resource_type_dst enumerated type + * for destination endpoint resources. + * + * Some registers encode multiple fields within them. For these, each field + * has a symbol below defining a field mask that encodes both the position + * and width of the field within its register. + * + * In some cases, different versions of IPA hardware use different offset or + * field mask values. In such cases an inline_function(ipa) is used rather + * than a MACRO to define the offset or field mask to use. + * + * Finally, some registers hold bitmasks representing endpoints. In such + * cases the @available field in the @ipa structure defines the "full" set + * of valid bits for the register. + */ + +#define IPA_REG_ENABLED_PIPES_OFFSET 0x00000038 + +#define IPA_REG_COMP_CFG_OFFSET 0x0000003c +#define ENABLE_FMASK GENMASK(0, 0) +#define GSI_SNOC_BYPASS_DIS_FMASK GENMASK(1, 1) +#define GEN_QMB_0_SNOC_BYPASS_DIS_FMASK GENMASK(2, 2) +#define GEN_QMB_1_SNOC_BYPASS_DIS_FMASK GENMASK(3, 3) +#define IPA_DCMP_FAST_CLK_EN_FMASK GENMASK(4, 4) +#define IPA_QMB_SELECT_CONS_EN_FMASK GENMASK(5, 5) +#define IPA_QMB_SELECT_PROD_EN_FMASK GENMASK(6, 6) +#define GSI_MULTI_INORDER_RD_DIS_FMASK GENMASK(7, 7) +#define GSI_MULTI_INORDER_WR_DIS_FMASK GENMASK(8, 8) +#define GEN_QMB_0_MULTI_INORDER_RD_DIS_FMASK GENMASK(9, 9) +#define GEN_QMB_1_MULTI_INORDER_RD_DIS_FMASK GENMASK(10, 10) +#define GEN_QMB_0_MULTI_INORDER_WR_DIS_FMASK GENMASK(11, 11) +#define GEN_QMB_1_MULTI_INORDER_WR_DIS_FMASK GENMASK(12, 12) +#define GEN_QMB_0_SNOC_CNOC_LOOP_PROT_DIS_FMASK GENMASK(13, 13) +#define GSI_SNOC_CNOC_LOOP_PROT_DISABLE_FMASK GENMASK(14, 14) +#define GSI_MULTI_AXI_MASTERS_DIS_FMASK GENMASK(15, 15) +#define IPA_QMB_SELECT_GLOBAL_EN_FMASK GENMASK(16, 16) +#define IPA_ATOMIC_FETCHER_ARB_LOCK_DIS_FMASK GENMASK(20, 17) + +#define IPA_REG_CLKON_CFG_OFFSET 0x00000044 +#define RX_FMASK GENMASK(0, 0) +#define PROC_FMASK GENMASK(1, 1) +#define TX_WRAPPER_FMASK GENMASK(2, 2) +#define MISC_FMASK GENMASK(3, 3) +#define RAM_ARB_FMASK GENMASK(4, 4) +#define FTCH_HPS_FMASK GENMASK(5, 5) +#define FTCH_DPS_FMASK GENMASK(6, 6) +#define HPS_FMASK GENMASK(7, 7) +#define DPS_FMASK GENMASK(8, 8) +#define RX_HPS_CMDQS_FMASK GENMASK(9, 9) +#define HPS_DPS_CMDQS_FMASK GENMASK(10, 10) +#define DPS_TX_CMDQS_FMASK GENMASK(11, 11) +#define RSRC_MNGR_FMASK GENMASK(12, 12) +#define CTX_HANDLER_FMASK GENMASK(13, 13) +#define ACK_MNGR_FMASK GENMASK(14, 14) +#define D_DCPH_FMASK GENMASK(15, 15) +#define H_DCPH_FMASK GENMASK(16, 16) +#define DCMP_FMASK GENMASK(17, 17) +#define NTF_TX_CMDQS_FMASK GENMASK(18, 18) +#define TX_0_FMASK GENMASK(19, 19) +#define TX_1_FMASK GENMASK(20, 20) +#define FNR_FMASK GENMASK(21, 21) +#define QSB2AXI_CMDQ_L_FMASK GENMASK(22, 22) +#define AGGR_WRAPPER_FMASK GENMASK(23, 23) +#define RAM_SLAVEWAY_FMASK GENMASK(24, 24) +#define QMB_FMASK GENMASK(25, 25) +#define WEIGHT_ARB_FMASK GENMASK(26, 26) +#define GSI_IF_FMASK GENMASK(27, 27) +#define GLOBAL_FMASK GENMASK(28, 28) +#define GLOBAL_2X_CLK_FMASK GENMASK(29, 29) + +#define IPA_REG_ROUTE_OFFSET 0x00000048 +#define ROUTE_DIS_FMASK GENMASK(0, 0) +#define ROUTE_DEF_PIPE_FMASK GENMASK(5, 1) +#define ROUTE_DEF_HDR_TABLE_FMASK GENMASK(6, 6) +#define ROUTE_DEF_HDR_OFST_FMASK GENMASK(16, 7) +#define ROUTE_FRAG_DEF_PIPE_FMASK GENMASK(21, 17) +#define ROUTE_DEF_RETAIN_HDR_FMASK GENMASK(24, 24) + +#define IPA_REG_SHARED_MEM_SIZE_OFFSET 0x00000054 +#define SHARED_MEM_SIZE_FMASK GENMASK(15, 0) +#define SHARED_MEM_BADDR_FMASK GENMASK(31, 16) + +#define IPA_REG_QSB_MAX_WRITES_OFFSET 0x00000074 +#define GEN_QMB_0_MAX_WRITES_FMASK GENMASK(3, 0) +#define GEN_QMB_1_MAX_WRITES_FMASK GENMASK(7, 4) + +#define IPA_REG_QSB_MAX_READS_OFFSET 0x00000078 +#define GEN_QMB_0_MAX_READS_FMASK GENMASK(3, 0) +#define GEN_QMB_1_MAX_READS_FMASK GENMASK(7, 4) +/* The next two fields are present for IPA v4.0 and above */ +#define GEN_QMB_0_MAX_READS_BEATS_FMASK GENMASK(23, 16) +#define GEN_QMB_1_MAX_READS_BEATS_FMASK GENMASK(31, 24) + +static inline u32 ipa_reg_state_aggr_active_offset(enum ipa_version version) +{ + if (version == IPA_VERSION_3_5_1) + return 0x0000010c; + + return 0x000000b4; +} +/* ipa->available defines the valid bits in the STATE_AGGR_ACTIVE register */ + +/* The next register is present for IPA v4.2 and above */ +#define IPA_REG_FILT_ROUT_HASH_EN_OFFSET 0x00000148 +#define IPV6_ROUTER_HASH_EN GENMASK(0, 0) +#define IPV6_FILTER_HASH_EN GENMASK(4, 4) +#define IPV4_ROUTER_HASH_EN GENMASK(8, 8) +#define IPV4_FILTER_HASH_EN GENMASK(12, 12) + +static inline u32 ipa_reg_filt_rout_hash_flush_offset(enum ipa_version version) +{ + if (version == IPA_VERSION_3_5_1) + return 0x0000090; + + return 0x000014c; +} + +#define IPV6_ROUTER_HASH_FLUSH GENMASK(0, 0) +#define IPV6_FILTER_HASH_FLUSH GENMASK(4, 4) +#define IPV4_ROUTER_HASH_FLUSH GENMASK(8, 8) +#define IPV4_FILTER_HASH_FLUSH GENMASK(12, 12) + +#define IPA_REG_BCR_OFFSET 0x000001d0 +#define BCR_CMDQ_L_LACK_ONE_ENTRY BIT(0) +#define BCR_TX_NOT_USING_BRESP BIT(1) +#define BCR_SUSPEND_L2_IRQ BIT(3) +#define BCR_HOLB_DROP_L2_IRQ BIT(4) +#define BCR_DUAL_TX BIT(5) + +/* Backward compatibility register value to use for each version */ +static inline u32 ipa_reg_bcr_val(enum ipa_version version) +{ + if (version == IPA_VERSION_3_5_1) + return BCR_CMDQ_L_LACK_ONE_ENTRY | BCR_TX_NOT_USING_BRESP | + BCR_SUSPEND_L2_IRQ | BCR_HOLB_DROP_L2_IRQ | BCR_DUAL_TX; + + if (version == IPA_VERSION_4_0 || version == IPA_VERSION_4_1) + return BCR_CMDQ_L_LACK_ONE_ENTRY | BCR_SUSPEND_L2_IRQ | + BCR_HOLB_DROP_L2_IRQ | BCR_DUAL_TX; + + return 0x00000000; +} + + +#define IPA_REG_LOCAL_PKT_PROC_CNTXT_BASE_OFFSET 0x000001e8 + +#define IPA_REG_AGGR_FORCE_CLOSE_OFFSET 0x000001ec +/* ipa->available defines the valid bits in the AGGR_FORCE_CLOSE register */ + +#define IPA_REG_COUNTER_CFG_OFFSET 0x000001f0 +#define AGGR_GRANULARITY GENMASK(8, 4) +/* Compute the value to use in the AGGR_GRANULARITY field representing + * the given number of microseconds (up to 1 millisecond). + * x = (32 * usec) / 1000 - 1 + */ +static inline u32 ipa_aggr_granularity_val(u32 microseconds) +{ + /* assert(microseconds >= 16); (?) */ + /* assert(microseconds <= 1015); */ + + return DIV_ROUND_CLOSEST(32 * microseconds, 1000) - 1; +} + +#define IPA_REG_TX_CFG_OFFSET 0x000001fc +/* The first three fields are present for IPA v3.5.1 only */ +#define TX0_PREFETCH_DISABLE GENMASK(0, 0) +#define TX1_PREFETCH_DISABLE GENMASK(1, 1) +#define PREFETCH_ALMOST_EMPTY_SIZE GENMASK(4, 2) +/* The next fields are present for IPA v4.0 and above */ +#define PREFETCH_ALMOST_EMPTY_SIZE_TX0 GENMASK(5, 2) +#define DMAW_SCND_OUTSD_PRED_THRESHOLD GENMASK(9, 6) +#define DMAW_SCND_OUTSD_PRED_EN GENMASK(10, 10) +#define DMAW_MAX_BEATS_256_DIS GENMASK(11, 11) +#define PA_MASK_EN GENMASK(12, 12) +#define PREFETCH_ALMOST_EMPTY_SIZE_TX1 GENMASK(16, 13) +/* The last two fields are present for IPA v4.2 and above */ +#define SSPND_PA_NO_START_STATE GENMASK(18, 18) +#define SSPND_PA_NO_BQ_STATE GENMASK(19, 19) + +#define IPA_REG_FLAVOR_0_OFFSET 0x00000210 +#define BAM_MAX_PIPES_FMASK GENMASK(4, 0) +#define BAM_MAX_CONS_PIPES_FMASK GENMASK(12, 8) +#define BAM_MAX_PROD_PIPES_FMASK GENMASK(20, 16) +#define BAM_PROD_LOWEST_FMASK GENMASK(27, 24) + +static inline u32 ipa_reg_idle_indication_cfg_offset(enum ipa_version version) +{ + if (version == IPA_VERSION_4_2) + return 0x00000240; + + return 0x00000220; +} + +#define ENTER_IDLE_DEBOUNCE_THRESH_FMASK GENMASK(15, 0) +#define CONST_NON_IDLE_ENABLE_FMASK GENMASK(16, 16) + +#define IPA_REG_SRC_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(rt) \ + (0x00000400 + 0x0020 * (rt)) +#define IPA_REG_SRC_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(rt) \ + (0x00000404 + 0x0020 * (rt)) +#define IPA_REG_SRC_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(rt) \ + (0x00000408 + 0x0020 * (rt)) +#define IPA_REG_DST_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(rt) \ + (0x00000500 + 0x0020 * (rt)) +#define IPA_REG_DST_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(rt) \ + (0x00000504 + 0x0020 * (rt)) +#define IPA_REG_DST_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(rt) \ + (0x00000508 + 0x0020 * (rt)) +#define X_MIN_LIM_FMASK GENMASK(5, 0) +#define X_MAX_LIM_FMASK GENMASK(13, 8) +#define Y_MIN_LIM_FMASK GENMASK(21, 16) +#define Y_MAX_LIM_FMASK GENMASK(29, 24) + +#define IPA_REG_ENDP_INIT_CTRL_N_OFFSET(ep) \ + (0x00000800 + 0x0070 * (ep)) +#define ENDP_SUSPEND_FMASK GENMASK(0, 0) +#define ENDP_DELAY_FMASK GENMASK(1, 1) + +#define IPA_REG_ENDP_INIT_CFG_N_OFFSET(ep) \ + (0x00000808 + 0x0070 * (ep)) +#define FRAG_OFFLOAD_EN_FMASK GENMASK(0, 0) +#define CS_OFFLOAD_EN_FMASK GENMASK(2, 1) +#define CS_METADATA_HDR_OFFSET_FMASK GENMASK(6, 3) +#define CS_GEN_QMB_MASTER_SEL_FMASK GENMASK(8, 8) + +#define IPA_REG_ENDP_INIT_HDR_N_OFFSET(ep) \ + (0x00000810 + 0x0070 * (ep)) +#define HDR_LEN_FMASK GENMASK(5, 0) +#define HDR_OFST_METADATA_VALID_FMASK GENMASK(6, 6) +#define HDR_OFST_METADATA_FMASK GENMASK(12, 7) +#define HDR_ADDITIONAL_CONST_LEN_FMASK GENMASK(18, 13) +#define HDR_OFST_PKT_SIZE_VALID_FMASK GENMASK(19, 19) +#define HDR_OFST_PKT_SIZE_FMASK GENMASK(25, 20) +#define HDR_A5_MUX_FMASK GENMASK(26, 26) +#define HDR_LEN_INC_DEAGG_HDR_FMASK GENMASK(27, 27) +#define HDR_METADATA_REG_VALID_FMASK GENMASK(28, 28) + +#define IPA_REG_ENDP_INIT_HDR_EXT_N_OFFSET(ep) \ + (0x00000814 + 0x0070 * (ep)) +#define HDR_ENDIANNESS_FMASK GENMASK(0, 0) +#define HDR_TOTAL_LEN_OR_PAD_VALID_FMASK GENMASK(1, 1) +#define HDR_TOTAL_LEN_OR_PAD_FMASK GENMASK(2, 2) +#define HDR_PAYLOAD_LEN_INC_PADDING_FMASK GENMASK(3, 3) +#define HDR_TOTAL_LEN_OR_PAD_OFFSET_FMASK GENMASK(9, 4) +#define HDR_PAD_TO_ALIGNMENT_FMASK GENMASK(13, 10) + +#define IPA_REG_ENDP_INIT_HDR_METADATA_MASK_N_OFFSET(ep) \ + (0x00000818 + 0x0070 * (ep)) + +#define IPA_REG_ENDP_INIT_MODE_N_OFFSET(ep) \ + (0x00000820 + 0x0070 * (ep)) +#define MODE_FMASK GENMASK(2, 0) +#define DEST_PIPE_INDEX_FMASK GENMASK(8, 4) +#define BYTE_THRESHOLD_FMASK GENMASK(27, 12) +#define PIPE_REPLICATION_EN_FMASK GENMASK(28, 28) +#define PAD_EN_FMASK GENMASK(29, 29) +#define HDR_FTCH_DISABLE_FMASK GENMASK(30, 30) + +#define IPA_REG_ENDP_INIT_AGGR_N_OFFSET(ep) \ + (0x00000824 + 0x0070 * (ep)) +#define AGGR_EN_FMASK GENMASK(1, 0) +#define AGGR_TYPE_FMASK GENMASK(4, 2) +#define AGGR_BYTE_LIMIT_FMASK GENMASK(9, 5) +#define AGGR_TIME_LIMIT_FMASK GENMASK(14, 10) +#define AGGR_PKT_LIMIT_FMASK GENMASK(20, 15) +#define AGGR_SW_EOF_ACTIVE_FMASK GENMASK(21, 21) +#define AGGR_FORCE_CLOSE_FMASK GENMASK(22, 22) +#define AGGR_HARD_BYTE_LIMIT_ENABLE_FMASK GENMASK(24, 24) + +#define IPA_REG_ENDP_INIT_HOL_BLOCK_EN_N_OFFSET(ep) \ + (0x0000082c + 0x0070 * (ep)) +#define HOL_BLOCK_EN_FMASK GENMASK(0, 0) + +/* The next register is valid only for RX (IPA producer) endpoints */ +#define IPA_REG_ENDP_INIT_HOL_BLOCK_TIMER_N_OFFSET(ep) \ + (0x00000830 + 0x0070 * (ep)) +/* The next fields are present for IPA v4.2 only */ +#define BASE_VALUE_FMASK GENMASK(4, 0) +#define SCALE_FMASK GENMASK(12, 8) + +#define IPA_REG_ENDP_INIT_DEAGGR_N_OFFSET(ep) \ + (0x00000834 + 0x0070 * (ep)) +#define DEAGGR_HDR_LEN_FMASK GENMASK(5, 0) +#define PACKET_OFFSET_VALID_FMASK GENMASK(7, 7) +#define PACKET_OFFSET_LOCATION_FMASK GENMASK(13, 8) +#define MAX_PACKET_LEN_FMASK GENMASK(31, 16) + +#define IPA_REG_ENDP_INIT_RSRC_GRP_N_OFFSET(ep) \ + (0x00000838 + 0x0070 * (ep)) +#define RSRC_GRP_FMASK GENMASK(1, 0) + +#define IPA_REG_ENDP_INIT_SEQ_N_OFFSET(ep) \ + (0x0000083c + 0x0070 * (ep)) +#define HPS_SEQ_TYPE_FMASK GENMASK(3, 0) +#define DPS_SEQ_TYPE_FMASK GENMASK(7, 4) +#define HPS_REP_SEQ_TYPE_FMASK GENMASK(11, 8) +#define DPS_REP_SEQ_TYPE_FMASK GENMASK(15, 12) + +#define IPA_REG_ENDP_STATUS_N_OFFSET(ep) \ + (0x00000840 + 0x0070 * (ep)) +#define STATUS_EN_FMASK GENMASK(0, 0) +#define STATUS_ENDP_FMASK GENMASK(5, 1) +#define STATUS_LOCATION_FMASK GENMASK(8, 8) +/* The next field is present for IPA v4.0 and above */ +#define STATUS_PKT_SUPPRESS_FMASK GENMASK(9, 9) + +/* "er" is either an endpoint id (for filters) or a route id (for routes) */ +#define IPA_REG_ENDP_FILTER_ROUTER_HSH_CFG_N_OFFSET(er) \ + (0x0000085c + 0x0070 * (er)) +#define FILTER_HASH_MSK_SRC_ID_FMASK GENMASK(0, 0) +#define FILTER_HASH_MSK_SRC_IP_FMASK GENMASK(1, 1) +#define FILTER_HASH_MSK_DST_IP_FMASK GENMASK(2, 2) +#define FILTER_HASH_MSK_SRC_PORT_FMASK GENMASK(3, 3) +#define FILTER_HASH_MSK_DST_PORT_FMASK GENMASK(4, 4) +#define FILTER_HASH_MSK_PROTOCOL_FMASK GENMASK(5, 5) +#define FILTER_HASH_MSK_METADATA_FMASK GENMASK(6, 6) +#define IPA_REG_ENDP_FILTER_HASH_MSK_ALL GENMASK(6, 0) + +#define ROUTER_HASH_MSK_SRC_ID_FMASK GENMASK(16, 16) +#define ROUTER_HASH_MSK_SRC_IP_FMASK GENMASK(17, 17) +#define ROUTER_HASH_MSK_DST_IP_FMASK GENMASK(18, 18) +#define ROUTER_HASH_MSK_SRC_PORT_FMASK GENMASK(19, 19) +#define ROUTER_HASH_MSK_DST_PORT_FMASK GENMASK(20, 20) +#define ROUTER_HASH_MSK_PROTOCOL_FMASK GENMASK(21, 21) +#define ROUTER_HASH_MSK_METADATA_FMASK GENMASK(22, 22) +#define IPA_REG_ENDP_ROUTER_HASH_MSK_ALL GENMASK(22, 16) + +#define IPA_REG_IRQ_STTS_OFFSET \ + IPA_REG_IRQ_STTS_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_IRQ_STTS_EE_N_OFFSET(ee) \ + (0x00003008 + 0x1000 * (ee)) + +#define IPA_REG_IRQ_EN_OFFSET \ + IPA_REG_IRQ_EN_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_IRQ_EN_EE_N_OFFSET(ee) \ + (0x0000300c + 0x1000 * (ee)) + +#define IPA_REG_IRQ_CLR_OFFSET \ + IPA_REG_IRQ_CLR_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_IRQ_CLR_EE_N_OFFSET(ee) \ + (0x00003010 + 0x1000 * (ee)) + +#define IPA_REG_IRQ_UC_OFFSET \ + IPA_REG_IRQ_UC_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_IRQ_UC_EE_N_OFFSET(ee) \ + (0x0000301c + 0x1000 * (ee)) + +#define IPA_REG_IRQ_SUSPEND_INFO_OFFSET \ + IPA_REG_IRQ_SUSPEND_INFO_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_IRQ_SUSPEND_INFO_EE_N_OFFSET(ee) \ + (0x00003030 + 0x1000 * (ee)) +/* ipa->available defines the valid bits in the SUSPEND_INFO register */ + +#define IPA_REG_SUSPEND_IRQ_EN_OFFSET \ + IPA_REG_SUSPEND_IRQ_EN_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_SUSPEND_IRQ_EN_EE_N_OFFSET(ee) \ + (0x00003034 + 0x1000 * (ee)) +/* ipa->available defines the valid bits in the SUSPEND_IRQ_EN register */ + +#define IPA_REG_SUSPEND_IRQ_CLR_OFFSET \ + IPA_REG_SUSPEND_IRQ_CLR_EE_N_OFFSET(GSI_EE_AP) +#define IPA_REG_SUSPEND_IRQ_CLR_EE_N_OFFSET(ee) \ + (0x00003038 + 0x1000 * (ee)) +/* ipa->available defines the valid bits in the SUSPEND_IRQ_CLR register */ + +/** enum ipa_cs_offload_en - checksum offload field in ENDP_INIT_CFG_N */ +enum ipa_cs_offload_en { + IPA_CS_OFFLOAD_NONE = 0, + IPA_CS_OFFLOAD_UL = 1, + IPA_CS_OFFLOAD_DL = 2, + IPA_CS_RSVD +}; + +/** enum ipa_aggr_en - aggregation type field in ENDP_INIT_AGGR_N */ +enum ipa_aggr_en { + IPA_BYPASS_AGGR = 0, + IPA_ENABLE_AGGR = 1, + IPA_ENABLE_DEAGGR = 2, +}; + +/** enum ipa_aggr_type - aggregation type field in in_ENDP_INIT_AGGR_N */ +enum ipa_aggr_type { + IPA_MBIM_16 = 0, + IPA_HDLC = 1, + IPA_TLP = 2, + IPA_RNDIS = 3, + IPA_GENERIC = 4, + IPA_COALESCE = 5, + IPA_QCMAP = 6, +}; + +/** enum ipa_mode - mode field in ENDP_INIT_MODE_N */ +enum ipa_mode { + IPA_BASIC = 0, + IPA_ENABLE_FRAMING_HDLC = 1, + IPA_ENABLE_DEFRAMING_HDLC = 2, + IPA_DMA = 3, +}; + +/** + * enum ipa_seq_type - HPS and DPS sequencer type fields in in ENDP_INIT_SEQ_N + * @IPA_SEQ_DMA_ONLY: only DMA is performed + * @IPA_SEQ_PKT_PROCESS_NO_DEC_UCP: + * packet processing + no decipher + microcontroller (Ethernet Bridging) + * @IPA_SEQ_2ND_PKT_PROCESS_PASS_NO_DEC_UCP: + * second packet processing pass + no decipher + microcontroller + * @IPA_SEQ_DMA_DEC: DMA + cipher/decipher + * @IPA_SEQ_DMA_COMP_DECOMP: DMA + compression/decompression + * @IPA_SEQ_INVALID: invalid sequencer type + * + * The values defined here are broken into 4-bit nibbles that are written + * into fields of the INIT_SEQ_N endpoint registers. + */ +enum ipa_seq_type { + IPA_SEQ_DMA_ONLY = 0x0000, + IPA_SEQ_PKT_PROCESS_NO_DEC_UCP = 0x0002, + IPA_SEQ_2ND_PKT_PROCESS_PASS_NO_DEC_UCP = 0x0004, + IPA_SEQ_DMA_DEC = 0x0011, + IPA_SEQ_DMA_COMP_DECOMP = 0x0020, + IPA_SEQ_PKT_PROCESS_NO_DEC_NO_UCP_DMAP = 0x0806, + IPA_SEQ_INVALID = 0xffff, +}; + +int ipa_reg_init(struct ipa *ipa); +void ipa_reg_exit(struct ipa *ipa); + +#endif /* _IPA_REG_H_ */ diff --git a/drivers/net/ipa/ipa_version.h b/drivers/net/ipa/ipa_version.h new file mode 100644 index 000000000000..85449df0f512 --- /dev/null +++ b/drivers/net/ipa/ipa_version.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2019-2020 Linaro Ltd. + */ +#ifndef _IPA_VERSION_H_ +#define _IPA_VERSION_H_ + +/** + * enum ipa_version + * + * Defines the version of IPA (and GSI) hardware present on the platform. + * It seems this might be better defined elsewhere, but having it here gets + * it where it's needed. + */ +enum ipa_version { + IPA_VERSION_3_5_1, /* GSI version 1.3.0 */ + IPA_VERSION_4_0, /* GSI version 2.0 */ + IPA_VERSION_4_1, /* GSI version 2.1 */ + IPA_VERSION_4_2, /* GSI version 2.2 */ +}; + +#endif /* _IPA_VERSION_H_ */