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| 2 |
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| 3 | |
| 4 | * Copyright (C) 2018-2024 Linaro Ltd.
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| 5 |
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| 6 | #ifndef _IPA_INTERRUPT_H_
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| 7 | #define _IPA_INTERRUPT_H_
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| 8 |
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| 9 | #include <linux/types.h>
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| 10 |
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| 11 | struct platform_device;
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| 12 |
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| 13 | struct ipa;
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| 14 | struct ipa_interrupt;
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| 15 |
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| 16 | enum ipa_irq_id;
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| 17 |
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| 18 | |
| 19 | * ipa_interrupt_suspend_enable - Enable TX_SUSPEND for an endpoint
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| 20 | * @interrupt: IPA interrupt structure
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| 21 | * @endpoint_id: Endpoint whose interrupt should be enabled
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| 22 | *
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| 23 | * Note: The "TX" in the name is from the perspective of the IPA hardware.
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| 24 | * A TX_SUSPEND interrupt arrives on an AP RX enpoint when packet data can't
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| 25 | * be delivered to the endpoint because it is suspended (or its underlying
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| 26 | * channel is stopped).
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| 27 |
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| 28 | void ipa_interrupt_suspend_enable(struct ipa_interrupt *interrupt,
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| 29 | u32 endpoint_id);
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| 30 |
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| 31 | |
| 32 | * ipa_interrupt_suspend_disable - Disable TX_SUSPEND for an endpoint
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| 33 | * @interrupt: IPA interrupt structure
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| 34 | * @endpoint_id: Endpoint whose interrupt should be disabled
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| 35 |
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| 36 | void ipa_interrupt_suspend_disable(struct ipa_interrupt *interrupt,
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| 37 | u32 endpoint_id);
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| 38 |
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| 39 | |
| 40 | * ipa_interrupt_simulate_suspend() - Simulate TX_SUSPEND IPA interrupt
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| 41 | * @interrupt: IPA interrupt structure
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| 42 | *
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| 43 | * This calls the TX_SUSPEND interrupt handler, as if such an interrupt
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| 44 | * had been signaled. This is needed to work around a hardware quirk
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| 45 | * that occurs if aggregation is active on an endpoint when its underlying
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| 46 | * channel is suspended.
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| 47 |
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| 48 | void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt);
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| 49 |
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| 50 | |
| 51 | * ipa_interrupt_enable() - Enable an IPA interrupt type
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| 52 | * @ipa: IPA pointer
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| 53 | * @ipa_irq: IPA interrupt ID
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| 54 |
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| 55 | void ipa_interrupt_enable(struct ipa *ipa, enum ipa_irq_id ipa_irq);
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| 56 |
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| 57 | |
| 58 | * ipa_interrupt_disable() - Disable an IPA interrupt type
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| 59 | * @ipa: IPA pointer
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| 60 | * @ipa_irq: IPA interrupt ID
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| 61 |
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| 62 | void ipa_interrupt_disable(struct ipa *ipa, enum ipa_irq_id ipa_irq);
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| 63 |
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| 64 | |
| 65 | * ipa_interrupt_irq_enable() - Enable IPA interrupts
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| 66 | * @ipa: IPA pointer
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| 67 | *
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| 68 | * This enables the IPA interrupt line
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| 69 |
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| 70 | void ipa_interrupt_irq_enable(struct ipa *ipa);
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| 71 |
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| 72 | |
| 73 | * ipa_interrupt_irq_disable() - Disable IPA interrupts
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| 74 | * @ipa: IPA pointer
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| 75 | *
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| 76 | * This disables the IPA interrupt line
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| 77 |
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| 78 | void ipa_interrupt_irq_disable(struct ipa *ipa);
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| 79 |
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| 80 | |
| 81 | * ipa_interrupt_config() - Configure IPA interrupts
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| 82 | * @ipa: IPA pointer
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| 83 | *
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| 84 | * Return: 0 if successful, or a negative error code
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| 85 |
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| 86 | int ipa_interrupt_config(struct ipa *ipa);
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| 87 |
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| 88 | |
| 89 | * ipa_interrupt_deconfig() - Inverse of ipa_interrupt_config()
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| 90 | * @ipa: IPA pointer
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| 91 |
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| 92 | void ipa_interrupt_deconfig(struct ipa *ipa);
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| 93 |
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| 94 | |
| 95 | * ipa_interrupt_init() - Initialize the IPA interrupt structure
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| 96 | * @pdev: IPA platform device pointer
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| 97 | *
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| 98 | * Return: Pointer to an IPA interrupt structure, or a pointer-coded error
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| 99 |
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| 100 | struct ipa_interrupt *ipa_interrupt_init(struct platform_device *pdev);
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| 101 |
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| 102 | |
| 103 | * ipa_interrupt_exit() - Inverse of ipa_interrupt_init()
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| 104 | * @interrupt: IPA interrupt structure
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| 105 |
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| 106 | void ipa_interrupt_exit(struct ipa_interrupt *interrupt);
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| 107 |
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| 108 | #endif
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