1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl> |
4 | */ |
5 | |
6 | #ifndef IXP4XX_QMGR_H |
7 | #define IXP4XX_QMGR_H |
8 | |
9 | #include <linux/io.h> |
10 | #include <linux/kernel.h> |
11 | |
12 | #define DEBUG_QMGR 0 |
13 | |
14 | #define HALF_QUEUES 32 |
15 | #define QUEUES 64 |
16 | #define MAX_QUEUE_LENGTH 4 /* in dwords */ |
17 | |
18 | #define QUEUE_STAT1_EMPTY 1 /* queue status bits */ |
19 | #define QUEUE_STAT1_NEARLY_EMPTY 2 |
20 | #define QUEUE_STAT1_NEARLY_FULL 4 |
21 | #define QUEUE_STAT1_FULL 8 |
22 | #define QUEUE_STAT2_UNDERFLOW 1 |
23 | #define QUEUE_STAT2_OVERFLOW 2 |
24 | |
25 | #define QUEUE_WATERMARK_0_ENTRIES 0 |
26 | #define QUEUE_WATERMARK_1_ENTRY 1 |
27 | #define QUEUE_WATERMARK_2_ENTRIES 2 |
28 | #define QUEUE_WATERMARK_4_ENTRIES 3 |
29 | #define QUEUE_WATERMARK_8_ENTRIES 4 |
30 | #define QUEUE_WATERMARK_16_ENTRIES 5 |
31 | #define QUEUE_WATERMARK_32_ENTRIES 6 |
32 | #define QUEUE_WATERMARK_64_ENTRIES 7 |
33 | |
34 | /* queue interrupt request conditions */ |
35 | #define QUEUE_IRQ_SRC_EMPTY 0 |
36 | #define QUEUE_IRQ_SRC_NEARLY_EMPTY 1 |
37 | #define QUEUE_IRQ_SRC_NEARLY_FULL 2 |
38 | #define QUEUE_IRQ_SRC_FULL 3 |
39 | #define QUEUE_IRQ_SRC_NOT_EMPTY 4 |
40 | #define QUEUE_IRQ_SRC_NOT_NEARLY_EMPTY 5 |
41 | #define QUEUE_IRQ_SRC_NOT_NEARLY_FULL 6 |
42 | #define QUEUE_IRQ_SRC_NOT_FULL 7 |
43 | |
44 | struct qmgr_regs { |
45 | u32 acc[QUEUES][MAX_QUEUE_LENGTH]; /* 0x000 - 0x3FF */ |
46 | u32 stat1[4]; /* 0x400 - 0x40F */ |
47 | u32 stat2[2]; /* 0x410 - 0x417 */ |
48 | u32 statne_h; /* 0x418 - queue nearly empty */ |
49 | u32 statf_h; /* 0x41C - queue full */ |
50 | u32 irqsrc[4]; /* 0x420 - 0x42F IRC source */ |
51 | u32 irqen[2]; /* 0x430 - 0x437 IRQ enabled */ |
52 | u32 irqstat[2]; /* 0x438 - 0x43F - IRQ access only */ |
53 | u32 reserved[1776]; |
54 | u32 sram[2048]; /* 0x2000 - 0x3FFF - config and buffer */ |
55 | }; |
56 | |
57 | void qmgr_put_entry(unsigned int queue, u32 val); |
58 | u32 qmgr_get_entry(unsigned int queue); |
59 | int qmgr_stat_empty(unsigned int queue); |
60 | int qmgr_stat_below_low_watermark(unsigned int queue); |
61 | int qmgr_stat_full(unsigned int queue); |
62 | int qmgr_stat_overflow(unsigned int queue); |
63 | void qmgr_release_queue(unsigned int queue); |
64 | void qmgr_set_irq(unsigned int queue, int src, |
65 | void (*handler)(void *pdev), void *pdev); |
66 | void qmgr_enable_irq(unsigned int queue); |
67 | void qmgr_disable_irq(unsigned int queue); |
68 | |
69 | /* request_ and release_queue() must be called from non-IRQ context */ |
70 | |
71 | #if DEBUG_QMGR |
72 | extern char qmgr_queue_descs[QUEUES][32]; |
73 | |
74 | int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */, |
75 | unsigned int nearly_empty_watermark, |
76 | unsigned int nearly_full_watermark, |
77 | const char *desc_format, const char* name); |
78 | #else |
79 | int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */, |
80 | unsigned int nearly_empty_watermark, |
81 | unsigned int nearly_full_watermark); |
82 | #define qmgr_request_queue(queue, len, nearly_empty_watermark, \ |
83 | nearly_full_watermark, desc_format, name) \ |
84 | __qmgr_request_queue(queue, len, nearly_empty_watermark, \ |
85 | nearly_full_watermark) |
86 | #endif |
87 | |
88 | #endif |
89 | |