1014 lines
28 KiB
C
1014 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2018-2023 Linaro Ltd.
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*/
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#include <linux/types.h>
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#include <linux/atomic.h>
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#include <linux/bitfield.h>
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#include <linux/device.h>
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#include <linux/bug.h>
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#include <linux/io.h>
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#include <linux/firmware.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/pm_runtime.h>
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#include <linux/firmware/qcom/qcom_scm.h>
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#include <linux/soc/qcom/mdt_loader.h>
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#include "ipa.h"
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#include "ipa_power.h"
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#include "ipa_data.h"
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#include "ipa_endpoint.h"
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#include "ipa_resource.h"
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#include "ipa_cmd.h"
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#include "ipa_reg.h"
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#include "ipa_mem.h"
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#include "ipa_table.h"
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#include "ipa_smp2p.h"
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#include "ipa_modem.h"
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#include "ipa_uc.h"
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#include "ipa_interrupt.h"
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#include "gsi_trans.h"
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#include "ipa_sysfs.h"
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/**
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* DOC: The IP Accelerator
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*
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* This driver supports the Qualcomm IP Accelerator (IPA), which is a
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* networking component found in many Qualcomm SoCs. The IPA is connected
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* to the application processor (AP), but is also connected (and partially
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* controlled by) other "execution environments" (EEs), such as a modem.
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*
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* The IPA is the conduit between the AP and the modem that carries network
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* traffic. This driver presents a network interface representing the
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* connection of the modem to external (e.g. LTE) networks.
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*
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* The IPA provides protocol checksum calculation, offloading this work
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* from the AP. The IPA offers additional functionality, including routing,
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* filtering, and NAT support, but that more advanced functionality is not
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* currently supported. Despite that, some resources--including routing
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* tables and filter tables--are defined in this driver because they must
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* be initialized even when the advanced hardware features are not used.
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*
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* There are two distinct layers that implement the IPA hardware, and this
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* is reflected in the organization of the driver. The generic software
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* interface (GSI) is an integral component of the IPA, providing a
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* well-defined communication layer between the AP subsystem and the IPA
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* core. The GSI implements a set of "channels" used for communication
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* between the AP and the IPA.
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*
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* The IPA layer uses GSI channels to implement its "endpoints". And while
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* a GSI channel carries data between the AP and the IPA, a pair of IPA
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* endpoints is used to carry traffic between two EEs. Specifically, the main
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* modem network interface is implemented by two pairs of endpoints: a TX
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* endpoint on the AP coupled with an RX endpoint on the modem; and another
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* RX endpoint on the AP receiving data from a TX endpoint on the modem.
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*/
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/* The name of the GSI firmware file relative to /lib/firmware */
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#define IPA_FW_PATH_DEFAULT "ipa_fws.mdt"
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#define IPA_PAS_ID 15
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/* Shift of 19.2 MHz timestamp to achieve lower resolution timestamps */
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#define DPL_TIMESTAMP_SHIFT 14 /* ~1.172 kHz, ~853 usec per tick */
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#define TAG_TIMESTAMP_SHIFT 14
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#define NAT_TIMESTAMP_SHIFT 24 /* ~1.144 Hz, ~874 msec per tick */
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/* Divider for 19.2 MHz crystal oscillator clock to get common timer clock */
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#define IPA_XO_CLOCK_DIVIDER 192 /* 1 is subtracted where used */
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/**
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* enum ipa_firmware_loader: How GSI firmware gets loaded
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*
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* @IPA_LOADER_DEFER: System not ready; try again later
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* @IPA_LOADER_SELF: AP loads GSI firmware
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* @IPA_LOADER_MODEM: Modem loads GSI firmware, signals when done
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* @IPA_LOADER_SKIP: Neither AP nor modem need to load GSI firmware
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* @IPA_LOADER_INVALID: GSI firmware loader specification is invalid
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*/
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enum ipa_firmware_loader {
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IPA_LOADER_DEFER,
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IPA_LOADER_SELF,
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IPA_LOADER_MODEM,
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IPA_LOADER_SKIP,
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IPA_LOADER_INVALID,
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};
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/**
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* ipa_setup() - Set up IPA hardware
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* @ipa: IPA pointer
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*
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* Perform initialization that requires issuing immediate commands on
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* the command TX endpoint. If the modem is doing GSI firmware load
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* and initialization, this function will be called when an SMP2P
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* interrupt has been signaled by the modem. Otherwise it will be
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* called from ipa_probe() after GSI firmware has been successfully
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* loaded, authenticated, and started by Trust Zone.
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*/
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int ipa_setup(struct ipa *ipa)
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{
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struct ipa_endpoint *exception_endpoint;
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struct ipa_endpoint *command_endpoint;
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struct device *dev = &ipa->pdev->dev;
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int ret;
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ret = gsi_setup(&ipa->gsi);
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if (ret)
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return ret;
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ret = ipa_power_setup(ipa);
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if (ret)
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goto err_gsi_teardown;
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ipa_endpoint_setup(ipa);
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/* We need to use the AP command TX endpoint to perform other
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* initialization, so we enable first.
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*/
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command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX];
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ret = ipa_endpoint_enable_one(command_endpoint);
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if (ret)
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goto err_endpoint_teardown;
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ret = ipa_mem_setup(ipa); /* No matching teardown required */
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if (ret)
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goto err_command_disable;
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ret = ipa_table_setup(ipa); /* No matching teardown required */
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if (ret)
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goto err_command_disable;
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/* Enable the exception handling endpoint, and tell the hardware
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* to use it by default.
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*/
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exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX];
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ret = ipa_endpoint_enable_one(exception_endpoint);
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if (ret)
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goto err_command_disable;
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ipa_endpoint_default_route_set(ipa, exception_endpoint->endpoint_id);
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/* We're all set. Now prepare for communication with the modem */
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ret = ipa_qmi_setup(ipa);
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if (ret)
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goto err_default_route_clear;
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ipa->setup_complete = true;
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dev_info(dev, "IPA driver setup completed successfully\n");
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return 0;
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err_default_route_clear:
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ipa_endpoint_default_route_clear(ipa);
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ipa_endpoint_disable_one(exception_endpoint);
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err_command_disable:
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ipa_endpoint_disable_one(command_endpoint);
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err_endpoint_teardown:
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ipa_endpoint_teardown(ipa);
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ipa_power_teardown(ipa);
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err_gsi_teardown:
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gsi_teardown(&ipa->gsi);
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return ret;
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}
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/**
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* ipa_teardown() - Inverse of ipa_setup()
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* @ipa: IPA pointer
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*/
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static void ipa_teardown(struct ipa *ipa)
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{
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struct ipa_endpoint *exception_endpoint;
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struct ipa_endpoint *command_endpoint;
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/* We're going to tear everything down, as if setup never completed */
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ipa->setup_complete = false;
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ipa_qmi_teardown(ipa);
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ipa_endpoint_default_route_clear(ipa);
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exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX];
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ipa_endpoint_disable_one(exception_endpoint);
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command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX];
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ipa_endpoint_disable_one(command_endpoint);
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ipa_endpoint_teardown(ipa);
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ipa_power_teardown(ipa);
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gsi_teardown(&ipa->gsi);
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}
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static void
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ipa_hardware_config_bcr(struct ipa *ipa, const struct ipa_data *data)
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{
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const struct reg *reg;
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u32 val;
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/* IPA v4.5+ has no backward compatibility register */
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if (ipa->version >= IPA_VERSION_4_5)
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return;
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reg = ipa_reg(ipa, IPA_BCR);
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val = data->backward_compat;
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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}
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static void ipa_hardware_config_tx(struct ipa *ipa)
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{
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enum ipa_version version = ipa->version;
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const struct reg *reg;
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u32 offset;
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u32 val;
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if (version <= IPA_VERSION_4_0 || version >= IPA_VERSION_4_5)
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return;
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/* Disable PA mask to allow HOLB drop */
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reg = ipa_reg(ipa, IPA_TX_CFG);
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offset = reg_offset(reg);
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val = ioread32(ipa->reg_virt + offset);
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val &= ~reg_bit(reg, PA_MASK_EN);
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iowrite32(val, ipa->reg_virt + offset);
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}
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static void ipa_hardware_config_clkon(struct ipa *ipa)
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{
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enum ipa_version version = ipa->version;
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const struct reg *reg;
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u32 val;
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if (version >= IPA_VERSION_4_5)
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return;
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if (version < IPA_VERSION_4_0 && version != IPA_VERSION_3_1)
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return;
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/* Implement some hardware workarounds */
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reg = ipa_reg(ipa, CLKON_CFG);
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if (version == IPA_VERSION_3_1) {
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/* Disable MISC clock gating */
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val = reg_bit(reg, CLKON_MISC);
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} else { /* IPA v4.0+ */
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/* Enable open global clocks in the CLKON configuration */
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val = reg_bit(reg, CLKON_GLOBAL);
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val |= reg_bit(reg, GLOBAL_2X_CLK);
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}
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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}
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/* Configure bus access behavior for IPA components */
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static void ipa_hardware_config_comp(struct ipa *ipa)
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{
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const struct reg *reg;
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u32 offset;
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u32 val;
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/* Nothing to configure prior to IPA v4.0 */
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if (ipa->version < IPA_VERSION_4_0)
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return;
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reg = ipa_reg(ipa, COMP_CFG);
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offset = reg_offset(reg);
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val = ioread32(ipa->reg_virt + offset);
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if (ipa->version == IPA_VERSION_4_0) {
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val &= ~reg_bit(reg, IPA_QMB_SELECT_CONS_EN);
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val &= ~reg_bit(reg, IPA_QMB_SELECT_PROD_EN);
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val &= ~reg_bit(reg, IPA_QMB_SELECT_GLOBAL_EN);
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} else if (ipa->version < IPA_VERSION_4_5) {
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val |= reg_bit(reg, GSI_MULTI_AXI_MASTERS_DIS);
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} else {
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/* For IPA v4.5 FULL_FLUSH_WAIT_RS_CLOSURE_EN is 0 */
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}
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val |= reg_bit(reg, GSI_MULTI_INORDER_RD_DIS);
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val |= reg_bit(reg, GSI_MULTI_INORDER_WR_DIS);
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iowrite32(val, ipa->reg_virt + offset);
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}
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/* Configure DDR and (possibly) PCIe max read/write QSB values */
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static void
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ipa_hardware_config_qsb(struct ipa *ipa, const struct ipa_data *data)
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{
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const struct ipa_qsb_data *data0;
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const struct ipa_qsb_data *data1;
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const struct reg *reg;
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u32 val;
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/* QMB 0 represents DDR; QMB 1 (if present) represents PCIe */
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data0 = &data->qsb_data[IPA_QSB_MASTER_DDR];
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if (data->qsb_count > 1)
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data1 = &data->qsb_data[IPA_QSB_MASTER_PCIE];
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/* Max outstanding write accesses for QSB masters */
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reg = ipa_reg(ipa, QSB_MAX_WRITES);
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val = reg_encode(reg, GEN_QMB_0_MAX_WRITES, data0->max_writes);
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if (data->qsb_count > 1)
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val |= reg_encode(reg, GEN_QMB_1_MAX_WRITES, data1->max_writes);
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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/* Max outstanding read accesses for QSB masters */
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reg = ipa_reg(ipa, QSB_MAX_READS);
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val = reg_encode(reg, GEN_QMB_0_MAX_READS, data0->max_reads);
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if (ipa->version >= IPA_VERSION_4_0)
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val |= reg_encode(reg, GEN_QMB_0_MAX_READS_BEATS,
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data0->max_reads_beats);
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if (data->qsb_count > 1) {
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val = reg_encode(reg, GEN_QMB_1_MAX_READS, data1->max_reads);
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if (ipa->version >= IPA_VERSION_4_0)
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val |= reg_encode(reg, GEN_QMB_1_MAX_READS_BEATS,
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data1->max_reads_beats);
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}
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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}
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/* The internal inactivity timer clock is used for the aggregation timer */
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#define TIMER_FREQUENCY 32000 /* 32 KHz inactivity timer clock */
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/* Compute the value to use in the COUNTER_CFG register AGGR_GRANULARITY
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* field to represent the given number of microseconds. The value is one
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* less than the number of timer ticks in the requested period. 0 is not
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* a valid granularity value (so for example @usec must be at least 16 for
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* a TIMER_FREQUENCY of 32000).
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*/
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static __always_inline u32 ipa_aggr_granularity_val(u32 usec)
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{
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return DIV_ROUND_CLOSEST(usec * TIMER_FREQUENCY, USEC_PER_SEC) - 1;
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}
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/* IPA uses unified Qtime starting at IPA v4.5, implementing various
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* timestamps and timers independent of the IPA core clock rate. The
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* Qtimer is based on a 56-bit timestamp incremented at each tick of
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* a 19.2 MHz SoC crystal oscillator (XO clock).
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*
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* For IPA timestamps (tag, NAT, data path logging) a lower resolution
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* timestamp is achieved by shifting the Qtimer timestamp value right
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* some number of bits to produce the low-order bits of the coarser
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* granularity timestamp.
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*
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* For timers, a common timer clock is derived from the XO clock using
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* a divider (we use 192, to produce a 100kHz timer clock). From
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* this common clock, three "pulse generators" are used to produce
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* timer ticks at a configurable frequency. IPA timers (such as
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* those used for aggregation or head-of-line block handling) now
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* define their period based on one of these pulse generators.
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*/
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static void ipa_qtime_config(struct ipa *ipa)
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{
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const struct reg *reg;
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u32 offset;
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u32 val;
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/* Timer clock divider must be disabled when we change the rate */
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reg = ipa_reg(ipa, TIMERS_XO_CLK_DIV_CFG);
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iowrite32(0, ipa->reg_virt + reg_offset(reg));
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reg = ipa_reg(ipa, QTIME_TIMESTAMP_CFG);
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/* Set DPL time stamp resolution to use Qtime (instead of 1 msec) */
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val = reg_encode(reg, DPL_TIMESTAMP_LSB, DPL_TIMESTAMP_SHIFT);
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val |= reg_bit(reg, DPL_TIMESTAMP_SEL);
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/* Configure tag and NAT Qtime timestamp resolution as well */
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val = reg_encode(reg, TAG_TIMESTAMP_LSB, TAG_TIMESTAMP_SHIFT);
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val = reg_encode(reg, NAT_TIMESTAMP_LSB, NAT_TIMESTAMP_SHIFT);
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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/* Set granularity of pulse generators used for other timers */
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reg = ipa_reg(ipa, TIMERS_PULSE_GRAN_CFG);
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val = reg_encode(reg, PULSE_GRAN_0, IPA_GRAN_100_US);
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val |= reg_encode(reg, PULSE_GRAN_1, IPA_GRAN_1_MS);
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if (ipa->version >= IPA_VERSION_5_0) {
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val |= reg_encode(reg, PULSE_GRAN_2, IPA_GRAN_10_MS);
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val |= reg_encode(reg, PULSE_GRAN_3, IPA_GRAN_10_MS);
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} else {
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val |= reg_encode(reg, PULSE_GRAN_2, IPA_GRAN_1_MS);
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}
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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/* Actual divider is 1 more than value supplied here */
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reg = ipa_reg(ipa, TIMERS_XO_CLK_DIV_CFG);
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offset = reg_offset(reg);
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val = reg_encode(reg, DIV_VALUE, IPA_XO_CLOCK_DIVIDER - 1);
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iowrite32(val, ipa->reg_virt + offset);
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/* Divider value is set; re-enable the common timer clock divider */
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val |= reg_bit(reg, DIV_ENABLE);
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iowrite32(val, ipa->reg_virt + offset);
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}
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/* Before IPA v4.5 timing is controlled by a counter register */
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static void ipa_hardware_config_counter(struct ipa *ipa)
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{
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u32 granularity = ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY);
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const struct reg *reg;
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u32 val;
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reg = ipa_reg(ipa, COUNTER_CFG);
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/* If defined, EOT_COAL_GRANULARITY is 0 */
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val = reg_encode(reg, AGGR_GRANULARITY, granularity);
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iowrite32(val, ipa->reg_virt + reg_offset(reg));
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}
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static void ipa_hardware_config_timing(struct ipa *ipa)
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{
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if (ipa->version < IPA_VERSION_4_5)
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ipa_hardware_config_counter(ipa);
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else
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ipa_qtime_config(ipa);
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}
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static void ipa_hardware_config_hashing(struct ipa *ipa)
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{
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const struct reg *reg;
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/* Other than IPA v4.2, all versions enable "hashing". Starting
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* with IPA v5.0, the filter and router tables are implemented
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* differently, but the default configuration enables this feature
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* (now referred to as "cacheing"), so there's nothing to do here.
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*/
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if (ipa->version != IPA_VERSION_4_2)
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return;
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/* IPA v4.2 does not support hashed tables, so disable them */
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reg = ipa_reg(ipa, FILT_ROUT_HASH_EN);
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/* IPV6_ROUTER_HASH, IPV6_FILTER_HASH, IPV4_ROUTER_HASH,
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* IPV4_FILTER_HASH are all zero.
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*/
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iowrite32(0, ipa->reg_virt + reg_offset(reg));
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}
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static void ipa_idle_indication_cfg(struct ipa *ipa,
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u32 enter_idle_debounce_thresh,
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bool const_non_idle_enable)
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{
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|
const struct reg *reg;
|
|
u32 val;
|
|
|
|
if (ipa->version < IPA_VERSION_3_5_1)
|
|
return;
|
|
|
|
reg = ipa_reg(ipa, IDLE_INDICATION_CFG);
|
|
val = reg_encode(reg, ENTER_IDLE_DEBOUNCE_THRESH,
|
|
enter_idle_debounce_thresh);
|
|
if (const_non_idle_enable)
|
|
val |= reg_bit(reg, CONST_NON_IDLE_ENABLE);
|
|
|
|
iowrite32(val, ipa->reg_virt + reg_offset(reg));
|
|
}
|
|
|
|
/**
|
|
* ipa_hardware_dcd_config() - Enable dynamic clock division on IPA
|
|
* @ipa: IPA pointer
|
|
*
|
|
* Configures when the IPA signals it is idle to the global clock
|
|
* controller, which can respond by scaling down the clock to save
|
|
* power.
|
|
*/
|
|
static void ipa_hardware_dcd_config(struct ipa *ipa)
|
|
{
|
|
/* Recommended values for IPA 3.5 and later 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
|
|
* @data: IPA configuration data
|
|
*/
|
|
static void ipa_hardware_config(struct ipa *ipa, const struct ipa_data *data)
|
|
{
|
|
ipa_hardware_config_bcr(ipa, data);
|
|
ipa_hardware_config_tx(ipa);
|
|
ipa_hardware_config_clkon(ipa);
|
|
ipa_hardware_config_comp(ipa);
|
|
ipa_hardware_config_qsb(ipa, data);
|
|
ipa_hardware_config_timing(ipa);
|
|
ipa_hardware_config_hashing(ipa);
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* ipa_config() - Configure IPA hardware
|
|
* @ipa: IPA pointer
|
|
* @data: IPA configuration data
|
|
*
|
|
* Perform initialization requiring IPA power to be enabled.
|
|
*/
|
|
static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
|
|
{
|
|
int ret;
|
|
|
|
ipa_hardware_config(ipa, data);
|
|
|
|
ret = ipa_mem_config(ipa);
|
|
if (ret)
|
|
goto err_hardware_deconfig;
|
|
|
|
ipa->interrupt = ipa_interrupt_config(ipa);
|
|
if (IS_ERR(ipa->interrupt)) {
|
|
ret = PTR_ERR(ipa->interrupt);
|
|
ipa->interrupt = NULL;
|
|
goto err_mem_deconfig;
|
|
}
|
|
|
|
ipa_uc_config(ipa);
|
|
|
|
ret = ipa_endpoint_config(ipa);
|
|
if (ret)
|
|
goto err_uc_deconfig;
|
|
|
|
ipa_table_config(ipa); /* No deconfig required */
|
|
|
|
/* Assign resource limitation to each group; no deconfig required */
|
|
ret = ipa_resource_config(ipa, data->resource_data);
|
|
if (ret)
|
|
goto err_endpoint_deconfig;
|
|
|
|
ret = ipa_modem_config(ipa);
|
|
if (ret)
|
|
goto err_endpoint_deconfig;
|
|
|
|
return 0;
|
|
|
|
err_endpoint_deconfig:
|
|
ipa_endpoint_deconfig(ipa);
|
|
err_uc_deconfig:
|
|
ipa_uc_deconfig(ipa);
|
|
ipa_interrupt_deconfig(ipa->interrupt);
|
|
ipa->interrupt = NULL;
|
|
err_mem_deconfig:
|
|
ipa_mem_deconfig(ipa);
|
|
err_hardware_deconfig:
|
|
ipa_hardware_deconfig(ipa);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ipa_deconfig() - Inverse of ipa_config()
|
|
* @ipa: IPA pointer
|
|
*/
|
|
static void ipa_deconfig(struct ipa *ipa)
|
|
{
|
|
ipa_modem_deconfig(ipa);
|
|
ipa_endpoint_deconfig(ipa);
|
|
ipa_uc_deconfig(ipa);
|
|
ipa_interrupt_deconfig(ipa->interrupt);
|
|
ipa->interrupt = NULL;
|
|
ipa_mem_deconfig(ipa);
|
|
ipa_hardware_deconfig(ipa);
|
|
}
|
|
|
|
static int ipa_firmware_load(struct device *dev)
|
|
{
|
|
const struct firmware *fw;
|
|
struct device_node *node;
|
|
struct resource res;
|
|
phys_addr_t phys;
|
|
const char *path;
|
|
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);
|
|
of_node_put(node);
|
|
if (ret) {
|
|
dev_err(dev, "error %d getting \"memory-region\" resource\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Use name from DTB if specified; use default for *any* error */
|
|
ret = of_property_read_string(dev->of_node, "firmware-name", &path);
|
|
if (ret) {
|
|
dev_dbg(dev, "error %d getting \"firmware-name\" resource\n",
|
|
ret);
|
|
path = IPA_FW_PATH_DEFAULT;
|
|
}
|
|
|
|
ret = request_firmware(&fw, path, dev);
|
|
if (ret) {
|
|
dev_err(dev, "error %d requesting \"%s\"\n", ret, 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, path, IPA_PAS_ID, virt, phys, size, NULL);
|
|
if (ret)
|
|
dev_err(dev, "error %d loading \"%s\"\n", ret, path);
|
|
else if ((ret = qcom_scm_pas_auth_and_reset(IPA_PAS_ID)))
|
|
dev_err(dev, "error %d authenticating \"%s\"\n", ret, path);
|
|
|
|
memunmap(virt);
|
|
out_release_firmware:
|
|
release_firmware(fw);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id ipa_match[] = {
|
|
{
|
|
.compatible = "qcom,msm8998-ipa",
|
|
.data = &ipa_data_v3_1,
|
|
},
|
|
{
|
|
.compatible = "qcom,sdm845-ipa",
|
|
.data = &ipa_data_v3_5_1,
|
|
},
|
|
{
|
|
.compatible = "qcom,sc7180-ipa",
|
|
.data = &ipa_data_v4_2,
|
|
},
|
|
{
|
|
.compatible = "qcom,sdx55-ipa",
|
|
.data = &ipa_data_v4_5,
|
|
},
|
|
{
|
|
.compatible = "qcom,sm6350-ipa",
|
|
.data = &ipa_data_v4_7,
|
|
},
|
|
{
|
|
.compatible = "qcom,sm8350-ipa",
|
|
.data = &ipa_data_v4_9,
|
|
},
|
|
{
|
|
.compatible = "qcom,sc7280-ipa",
|
|
.data = &ipa_data_v4_11,
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ipa_match);
|
|
|
|
/* 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)
|
|
{
|
|
/* At one time we assumed a 64-bit build, allowing some do_div()
|
|
* calls to be replaced by simple division or modulo operations.
|
|
* We currently only perform divide and modulo operations on u32,
|
|
* u16, or size_t objects, and of those only size_t has any chance
|
|
* of being a 64-bit value. (It should be guaranteed 32 bits wide
|
|
* on a 32-bit build, but there is no harm in verifying that.)
|
|
*/
|
|
BUILD_BUG_ON(!IS_ENABLED(CONFIG_64BIT) && sizeof(size_t) != 4);
|
|
|
|
/* 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);
|
|
|
|
/* This is used as a divisor */
|
|
BUILD_BUG_ON(!IPA_AGGR_GRANULARITY);
|
|
|
|
/* Aggregation granularity value can't be 0, and must fit */
|
|
BUILD_BUG_ON(!ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY));
|
|
}
|
|
|
|
static enum ipa_firmware_loader ipa_firmware_loader(struct device *dev)
|
|
{
|
|
bool modem_init;
|
|
const char *str;
|
|
int ret;
|
|
|
|
/* Look up the old and new properties by name */
|
|
modem_init = of_property_read_bool(dev->of_node, "modem-init");
|
|
ret = of_property_read_string(dev->of_node, "qcom,gsi-loader", &str);
|
|
|
|
/* If the new property doesn't exist, it's legacy behavior */
|
|
if (ret == -EINVAL) {
|
|
if (modem_init)
|
|
return IPA_LOADER_MODEM;
|
|
goto out_self;
|
|
}
|
|
|
|
/* Any other error on the new property means it's poorly defined */
|
|
if (ret)
|
|
return IPA_LOADER_INVALID;
|
|
|
|
/* New property value exists; if old one does too, that's invalid */
|
|
if (modem_init)
|
|
return IPA_LOADER_INVALID;
|
|
|
|
/* Modem loads GSI firmware for "modem" */
|
|
if (!strcmp(str, "modem"))
|
|
return IPA_LOADER_MODEM;
|
|
|
|
/* No GSI firmware load is needed for "skip" */
|
|
if (!strcmp(str, "skip"))
|
|
return IPA_LOADER_SKIP;
|
|
|
|
/* Any value other than "self" is an error */
|
|
if (strcmp(str, "self"))
|
|
return IPA_LOADER_INVALID;
|
|
out_self:
|
|
/* We need Trust Zone to load firmware; make sure it's available */
|
|
if (qcom_scm_is_available())
|
|
return IPA_LOADER_SELF;
|
|
|
|
return IPA_LOADER_DEFER;
|
|
}
|
|
|
|
/**
|
|
* 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 IPA power 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 device *dev = &pdev->dev;
|
|
enum ipa_firmware_loader loader;
|
|
const struct ipa_data *data;
|
|
struct ipa_power *power;
|
|
struct ipa *ipa;
|
|
int ret;
|
|
|
|
ipa_validate_build();
|
|
|
|
/* Get configuration data early; needed for power initialization */
|
|
data = of_device_get_match_data(dev);
|
|
if (!data) {
|
|
dev_err(dev, "matched hardware not supported\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!ipa_version_supported(data->version)) {
|
|
dev_err(dev, "unsupported IPA version %u\n", data->version);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!data->modem_route_count) {
|
|
dev_err(dev, "modem_route_count cannot be zero\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
loader = ipa_firmware_loader(dev);
|
|
if (loader == IPA_LOADER_INVALID)
|
|
return -EINVAL;
|
|
if (loader == IPA_LOADER_DEFER)
|
|
return -EPROBE_DEFER;
|
|
|
|
/* The clock and interconnects might not be ready when we're
|
|
* probed, so might return -EPROBE_DEFER.
|
|
*/
|
|
power = ipa_power_init(dev, data->power_data);
|
|
if (IS_ERR(power))
|
|
return PTR_ERR(power);
|
|
|
|
/* No more EPROBE_DEFER. Allocate and initialize the IPA structure */
|
|
ipa = kzalloc(sizeof(*ipa), GFP_KERNEL);
|
|
if (!ipa) {
|
|
ret = -ENOMEM;
|
|
goto err_power_exit;
|
|
}
|
|
|
|
ipa->pdev = pdev;
|
|
dev_set_drvdata(dev, ipa);
|
|
ipa->power = power;
|
|
ipa->version = data->version;
|
|
ipa->modem_route_count = data->modem_route_count;
|
|
init_completion(&ipa->completion);
|
|
|
|
ret = ipa_reg_init(ipa);
|
|
if (ret)
|
|
goto err_kfree_ipa;
|
|
|
|
ret = ipa_mem_init(ipa, data->mem_data);
|
|
if (ret)
|
|
goto err_reg_exit;
|
|
|
|
ret = gsi_init(&ipa->gsi, pdev, ipa->version, data->endpoint_count,
|
|
data->endpoint_data);
|
|
if (ret)
|
|
goto err_mem_exit;
|
|
|
|
/* Result is a non-zero mask of endpoints that support filtering */
|
|
ret = ipa_endpoint_init(ipa, data->endpoint_count, data->endpoint_data);
|
|
if (ret)
|
|
goto err_gsi_exit;
|
|
|
|
ret = ipa_table_init(ipa);
|
|
if (ret)
|
|
goto err_endpoint_exit;
|
|
|
|
ret = ipa_smp2p_init(ipa, loader == IPA_LOADER_MODEM);
|
|
if (ret)
|
|
goto err_table_exit;
|
|
|
|
/* Power needs to be active for config and setup */
|
|
ret = pm_runtime_get_sync(dev);
|
|
if (WARN_ON(ret < 0))
|
|
goto err_power_put;
|
|
|
|
ret = ipa_config(ipa, data);
|
|
if (ret)
|
|
goto err_power_put;
|
|
|
|
dev_info(dev, "IPA driver initialized");
|
|
|
|
/* If the modem is loading GSI firmware, it will trigger a call to
|
|
* ipa_setup() when it has finished. In that case we're done here.
|
|
*/
|
|
if (loader == IPA_LOADER_MODEM)
|
|
goto done;
|
|
|
|
if (loader == IPA_LOADER_SELF) {
|
|
/* The AP is loading GSI firmware; do so now */
|
|
ret = ipa_firmware_load(dev);
|
|
if (ret)
|
|
goto err_deconfig;
|
|
} /* Otherwise loader == IPA_LOADER_SKIP */
|
|
|
|
/* GSI firmware is loaded; proceed to setup */
|
|
ret = ipa_setup(ipa);
|
|
if (ret)
|
|
goto err_deconfig;
|
|
done:
|
|
pm_runtime_mark_last_busy(dev);
|
|
(void)pm_runtime_put_autosuspend(dev);
|
|
|
|
return 0;
|
|
|
|
err_deconfig:
|
|
ipa_deconfig(ipa);
|
|
err_power_put:
|
|
pm_runtime_put_noidle(dev);
|
|
ipa_smp2p_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_power_exit:
|
|
ipa_power_exit(power);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ipa_remove(struct platform_device *pdev)
|
|
{
|
|
struct ipa *ipa = dev_get_drvdata(&pdev->dev);
|
|
struct ipa_power *power = ipa->power;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
/* Prevent the modem from triggering a call to ipa_setup(). This
|
|
* also ensures a modem-initiated setup that's underway completes.
|
|
*/
|
|
ipa_smp2p_irq_disable_setup(ipa);
|
|
|
|
ret = pm_runtime_get_sync(dev);
|
|
if (WARN_ON(ret < 0))
|
|
goto out_power_put;
|
|
|
|
if (ipa->setup_complete) {
|
|
ret = ipa_modem_stop(ipa);
|
|
/* If starting or stopping is in progress, try once more */
|
|
if (ret == -EBUSY) {
|
|
usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
|
|
ret = ipa_modem_stop(ipa);
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
|
|
ipa_teardown(ipa);
|
|
}
|
|
|
|
ipa_deconfig(ipa);
|
|
out_power_put:
|
|
pm_runtime_put_noidle(dev);
|
|
ipa_smp2p_exit(ipa);
|
|
ipa_table_exit(ipa);
|
|
ipa_endpoint_exit(ipa);
|
|
gsi_exit(&ipa->gsi);
|
|
ipa_mem_exit(ipa);
|
|
ipa_reg_exit(ipa);
|
|
kfree(ipa);
|
|
ipa_power_exit(power);
|
|
|
|
dev_info(dev, "IPA driver removed");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipa_shutdown(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
|
|
ret = ipa_remove(pdev);
|
|
if (ret)
|
|
dev_err(&pdev->dev, "shutdown: remove returned %d\n", ret);
|
|
}
|
|
|
|
static const struct attribute_group *ipa_attribute_groups[] = {
|
|
&ipa_attribute_group,
|
|
&ipa_feature_attribute_group,
|
|
&ipa_endpoint_id_attribute_group,
|
|
&ipa_modem_attribute_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct platform_driver ipa_driver = {
|
|
.probe = ipa_probe,
|
|
.remove = ipa_remove,
|
|
.shutdown = ipa_shutdown,
|
|
.driver = {
|
|
.name = "ipa",
|
|
.pm = &ipa_pm_ops,
|
|
.of_match_table = ipa_match,
|
|
.dev_groups = ipa_attribute_groups,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(ipa_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("Qualcomm IP Accelerator device driver");
|