1 /* SPDX-License-Identifier: GPL-2.0 */
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2018-2020 Linaro Ltd.
6 #ifndef _IPA_INTERRUPT_H_
7 #define _IPA_INTERRUPT_H_
9 #include <linux/types.h>
10 #include <linux/bits.h>
16 * typedef ipa_irq_handler_t - IPA interrupt handler function type
18 * @irq_id: interrupt type
20 * Callback function registered by ipa_interrupt_add() to handle a specific
23 typedef void (*ipa_irq_handler_t)(struct ipa *ipa, enum ipa_irq_id irq_id);
26 * ipa_interrupt_add() - Register a handler for an IPA interrupt type
27 * @irq_id: IPA interrupt type
28 * @handler: Handler function for the interrupt
30 * Add a handler for an IPA interrupt and enable it. IPA interrupt
31 * handlers are run in threaded interrupt context, so are allowed to
34 void ipa_interrupt_add(struct ipa_interrupt *interrupt, enum ipa_irq_id irq_id,
35 ipa_irq_handler_t handler);
38 * ipa_interrupt_remove() - Remove the handler for an IPA interrupt type
39 * @interrupt: IPA interrupt structure
40 * @irq_id: IPA interrupt type
42 * Remove an IPA interrupt handler and disable it.
44 void ipa_interrupt_remove(struct ipa_interrupt *interrupt,
45 enum ipa_irq_id irq_id);
48 * ipa_interrupt_suspend_enable - Enable TX_SUSPEND for an endpoint
49 * @interrupt: IPA interrupt structure
50 * @endpoint_id: Endpoint whose interrupt should be enabled
52 * Note: The "TX" in the name is from the perspective of the IPA hardware.
53 * A TX_SUSPEND interrupt arrives on an AP RX enpoint when packet data can't
54 * be delivered to the endpoint because it is suspended (or its underlying
55 * channel is stopped).
57 void ipa_interrupt_suspend_enable(struct ipa_interrupt *interrupt,
61 * ipa_interrupt_suspend_disable - Disable TX_SUSPEND for an endpoint
62 * @interrupt: IPA interrupt structure
63 * @endpoint_id: Endpoint whose interrupt should be disabled
65 void ipa_interrupt_suspend_disable(struct ipa_interrupt *interrupt,
69 * ipa_interrupt_suspend_clear_all - clear all suspend interrupts
70 * @interrupt: IPA interrupt structure
72 * Clear the TX_SUSPEND interrupt for all endpoints that signaled it.
74 void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt);
77 * ipa_interrupt_simulate_suspend() - Simulate TX_SUSPEND IPA interrupt
78 * @interrupt: IPA interrupt structure
80 * This calls the TX_SUSPEND interrupt handler, as if such an interrupt
81 * had been signaled. This is needed to work around a hardware quirk
82 * that occurs if aggregation is active on an endpoint when its underlying
83 * channel is suspended.
85 void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt);
88 * ipa_interrupt_setup() - Set up the IPA interrupt framework
91 * Return: Pointer to IPA SMP2P info, or a pointer-coded error
93 struct ipa_interrupt *ipa_interrupt_setup(struct ipa *ipa);
96 * ipa_interrupt_teardown() - Tear down the IPA interrupt framework
97 * @interrupt: IPA interrupt structure
99 void ipa_interrupt_teardown(struct ipa_interrupt *interrupt);
101 #endif /* _IPA_INTERRUPT_H_ */