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1118a14710
Initialization of the IPA driver has several phases: - "init" phase can be done without any access to IPA hardware - "config" phase requires the IPA hardware to be clocked - "setup" phase requires the GSI layer to be functional Currently, initialization for the IPA interrupt handling code occurs in the setup phase. It requires access to the IPA hardware but does not need GSI, so it can be moved to the config phase instead. Call the interrupt configuration function early in ipa_config() rather than from ipa_setup(). Rename ipa_interrupt_setup() to be ipa_interrupt_config(), and ipa_interrupt_teardown() to be ipa_interupt_deconfig(), so their names properly indicate when they get called. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
102 lines
3.2 KiB
C
102 lines
3.2 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) 2018-2020 Linaro Ltd.
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*/
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#ifndef _IPA_INTERRUPT_H_
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#define _IPA_INTERRUPT_H_
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#include <linux/types.h>
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#include <linux/bits.h>
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struct ipa;
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struct ipa_interrupt;
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/**
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* typedef ipa_irq_handler_t - IPA interrupt handler function type
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* @ipa: IPA pointer
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* @irq_id: interrupt type
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*
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* Callback function registered by ipa_interrupt_add() to handle a specific
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* IPA interrupt type
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*/
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typedef void (*ipa_irq_handler_t)(struct ipa *ipa, enum ipa_irq_id irq_id);
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/**
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* ipa_interrupt_add() - Register a handler for an IPA interrupt type
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* @interrupt: IPA interrupt structure
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* @irq_id: IPA interrupt type
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* @handler: Handler function for the interrupt
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*
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* Add a handler for an IPA interrupt and enable it. IPA interrupt
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* handlers are run in threaded interrupt context, so are allowed to
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* block.
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*/
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void ipa_interrupt_add(struct ipa_interrupt *interrupt, enum ipa_irq_id irq_id,
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ipa_irq_handler_t handler);
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/**
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* ipa_interrupt_remove() - Remove the handler for an IPA interrupt type
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* @interrupt: IPA interrupt structure
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* @irq_id: IPA interrupt type
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*
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* Remove an IPA interrupt handler and disable it.
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*/
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void ipa_interrupt_remove(struct ipa_interrupt *interrupt,
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enum ipa_irq_id irq_id);
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/**
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* ipa_interrupt_suspend_enable - Enable TX_SUSPEND for an endpoint
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* @interrupt: IPA interrupt structure
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* @endpoint_id: Endpoint whose interrupt should be enabled
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*
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* Note: The "TX" in the name is from the perspective of the IPA hardware.
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* A TX_SUSPEND interrupt arrives on an AP RX enpoint when packet data can't
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* be delivered to the endpoint because it is suspended (or its underlying
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* channel is stopped).
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*/
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void ipa_interrupt_suspend_enable(struct ipa_interrupt *interrupt,
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u32 endpoint_id);
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/**
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* ipa_interrupt_suspend_disable - Disable TX_SUSPEND for an endpoint
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* @interrupt: IPA interrupt structure
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* @endpoint_id: Endpoint whose interrupt should be disabled
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*/
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void ipa_interrupt_suspend_disable(struct ipa_interrupt *interrupt,
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u32 endpoint_id);
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/**
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* ipa_interrupt_suspend_clear_all - clear all suspend interrupts
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* @interrupt: IPA interrupt structure
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*
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* Clear the TX_SUSPEND interrupt for all endpoints that signaled it.
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*/
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void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt);
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/**
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* ipa_interrupt_simulate_suspend() - Simulate TX_SUSPEND IPA interrupt
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* @interrupt: IPA interrupt structure
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*
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* This calls the TX_SUSPEND interrupt handler, as if such an interrupt
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* had been signaled. This is needed to work around a hardware quirk
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* that occurs if aggregation is active on an endpoint when its underlying
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* channel is suspended.
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*/
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void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt);
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/**
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* ipa_interrupt_config() - Configure the IPA interrupt framework
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* @ipa: IPA pointer
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*
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* Return: Pointer to IPA SMP2P info, or a pointer-coded error
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*/
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struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa);
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/**
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* ipa_interrupt_deconfig() - Inverse of ipa_interrupt_config()
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* @interrupt: IPA interrupt structure
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*/
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void ipa_interrupt_deconfig(struct ipa_interrupt *interrupt);
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#endif /* _IPA_INTERRUPT_H_ */
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