blob: c65f7c5cdc8d0eb3d0fd8d45eeea35c1aaa6a5c3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
* Copyright (C) 2018-2022 Linaro Ltd.
*/
#ifndef _GSI_PRIVATE_H_
#define _GSI_PRIVATE_H_
/* === Only "gsi.c" and "gsi_trans.c" should include this file === */
#include <linux/types.h>
struct gsi_trans;
struct gsi_ring;
struct gsi_channel;
#define GSI_RING_ELEMENT_SIZE 16 /* bytes; must be a power of 2 */
/**
* gsi_trans_move_complete() - Mark a GSI transaction completed
* @trans: Transaction whose state is to be updated
*/
void gsi_trans_move_complete(struct gsi_trans *trans);
/**
* gsi_trans_move_polled() - Mark a transaction polled
* @trans: Transaction whose state is to be updated
*/
void gsi_trans_move_polled(struct gsi_trans *trans);
/**
* gsi_trans_complete() - Complete a GSI transaction
* @trans: Transaction to complete
*
* Marks a transaction complete (including freeing it).
*/
void gsi_trans_complete(struct gsi_trans *trans);
/**
* gsi_channel_trans_mapped() - Return a transaction mapped to a TRE index
* @channel: Channel associated with the transaction
* @index: Index of the TRE having a transaction
*
* Return: The GSI transaction pointer associated with the TRE index
*/
struct gsi_trans *gsi_channel_trans_mapped(struct gsi_channel *channel,
u32 index);
/**
* gsi_channel_trans_complete() - Return a channel's next completed transaction
* @channel: Channel whose next transaction is to be returned
*
* Return: The next completed transaction, or NULL if nothing new
*/
struct gsi_trans *gsi_channel_trans_complete(struct gsi_channel *channel);
/**
* gsi_channel_trans_cancel_pending() - Cancel pending transactions
* @channel: Channel whose pending transactions should be cancelled
*
* Cancel all pending transactions on a channel. These are transactions
* that have been committed but not yet completed. This is required when
* the channel gets reset. At that time all pending transactions will be
* marked as cancelled.
*
* NOTE: Transactions already complete at the time of this call are
* unaffected.
*/
void gsi_channel_trans_cancel_pending(struct gsi_channel *channel);
/**
* gsi_channel_trans_init() - Initialize a channel's GSI transaction info
* @gsi: GSI pointer
* @channel_id: Channel number
*
* Return: 0 if successful, or -ENOMEM on allocation failure
*
* Creates and sets up information for managing transactions on a channel
*/
int gsi_channel_trans_init(struct gsi *gsi, u32 channel_id);
/**
* gsi_channel_trans_exit() - Inverse of gsi_channel_trans_init()
* @channel: Channel whose transaction information is to be cleaned up
*/
void gsi_channel_trans_exit(struct gsi_channel *channel);
/**
* gsi_channel_doorbell() - Ring a channel's doorbell
* @channel: Channel whose doorbell should be rung
*
* Rings a channel's doorbell to inform the GSI hardware that new
* transactions (TREs, really) are available for it to process.
*/
void gsi_channel_doorbell(struct gsi_channel *channel);
/* gsi_channel_update() - Update knowledge of channel hardware state
* @channel: Channel to be updated
*
* Consult hardware, change the state of any newly-completed transactions
* on a channel.
*/
void gsi_channel_update(struct gsi_channel *channel);
/**
* gsi_ring_virt() - Return virtual address for a ring entry
* @ring: Ring whose address is to be translated
* @index: Index (slot number) of entry
*/
void *gsi_ring_virt(struct gsi_ring *ring, u32 index);
/**
* gsi_trans_tx_committed() - Record bytes committed for transmit
* @trans: TX endpoint transaction being committed
*
* Report that a TX transaction has been committed. It updates some
* statistics used to manage transmit rates.
*/
void gsi_trans_tx_committed(struct gsi_trans *trans);
/**
* gsi_trans_tx_queued() - Report a queued TX channel transaction
* @trans: Transaction being passed to hardware
*
* Report to the network stack that a TX transaction is being supplied
* to the hardware.
*/
void gsi_trans_tx_queued(struct gsi_trans *trans);
#endif /* _GSI_PRIVATE_H_ */
|
