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88 lines
2.8 KiB
88 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2007 Krzysztof Halasa <[email protected]> |
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*/ |
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#ifndef IXP4XX_QMGR_H |
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#define IXP4XX_QMGR_H |
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#include <linux/io.h> |
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#include <linux/kernel.h> |
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#define DEBUG_QMGR 0 |
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#define HALF_QUEUES 32 |
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#define QUEUES 64 |
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#define MAX_QUEUE_LENGTH 4 /* in dwords */ |
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#define QUEUE_STAT1_EMPTY 1 /* queue status bits */ |
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#define QUEUE_STAT1_NEARLY_EMPTY 2 |
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#define QUEUE_STAT1_NEARLY_FULL 4 |
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#define QUEUE_STAT1_FULL 8 |
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#define QUEUE_STAT2_UNDERFLOW 1 |
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#define QUEUE_STAT2_OVERFLOW 2 |
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#define QUEUE_WATERMARK_0_ENTRIES 0 |
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#define QUEUE_WATERMARK_1_ENTRY 1 |
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#define QUEUE_WATERMARK_2_ENTRIES 2 |
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#define QUEUE_WATERMARK_4_ENTRIES 3 |
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#define QUEUE_WATERMARK_8_ENTRIES 4 |
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#define QUEUE_WATERMARK_16_ENTRIES 5 |
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#define QUEUE_WATERMARK_32_ENTRIES 6 |
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#define QUEUE_WATERMARK_64_ENTRIES 7 |
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/* queue interrupt request conditions */ |
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#define QUEUE_IRQ_SRC_EMPTY 0 |
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#define QUEUE_IRQ_SRC_NEARLY_EMPTY 1 |
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#define QUEUE_IRQ_SRC_NEARLY_FULL 2 |
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#define QUEUE_IRQ_SRC_FULL 3 |
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#define QUEUE_IRQ_SRC_NOT_EMPTY 4 |
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#define QUEUE_IRQ_SRC_NOT_NEARLY_EMPTY 5 |
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#define QUEUE_IRQ_SRC_NOT_NEARLY_FULL 6 |
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#define QUEUE_IRQ_SRC_NOT_FULL 7 |
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struct qmgr_regs { |
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u32 acc[QUEUES][MAX_QUEUE_LENGTH]; /* 0x000 - 0x3FF */ |
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u32 stat1[4]; /* 0x400 - 0x40F */ |
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u32 stat2[2]; /* 0x410 - 0x417 */ |
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u32 statne_h; /* 0x418 - queue nearly empty */ |
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u32 statf_h; /* 0x41C - queue full */ |
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u32 irqsrc[4]; /* 0x420 - 0x42F IRC source */ |
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u32 irqen[2]; /* 0x430 - 0x437 IRQ enabled */ |
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u32 irqstat[2]; /* 0x438 - 0x43F - IRQ access only */ |
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u32 reserved[1776]; |
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u32 sram[2048]; /* 0x2000 - 0x3FFF - config and buffer */ |
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}; |
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void qmgr_put_entry(unsigned int queue, u32 val); |
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u32 qmgr_get_entry(unsigned int queue); |
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int qmgr_stat_empty(unsigned int queue); |
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int qmgr_stat_below_low_watermark(unsigned int queue); |
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int qmgr_stat_full(unsigned int queue); |
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int qmgr_stat_overflow(unsigned int queue); |
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void qmgr_release_queue(unsigned int queue); |
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void qmgr_set_irq(unsigned int queue, int src, |
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void (*handler)(void *pdev), void *pdev); |
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void qmgr_enable_irq(unsigned int queue); |
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void qmgr_disable_irq(unsigned int queue); |
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/* request_ and release_queue() must be called from non-IRQ context */ |
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#if DEBUG_QMGR |
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extern char qmgr_queue_descs[QUEUES][32]; |
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int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */, |
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unsigned int nearly_empty_watermark, |
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unsigned int nearly_full_watermark, |
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const char *desc_format, const char* name); |
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#else |
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int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */, |
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unsigned int nearly_empty_watermark, |
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unsigned int nearly_full_watermark); |
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#define qmgr_request_queue(queue, len, nearly_empty_watermark, \ |
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nearly_full_watermark, desc_format, name) \ |
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__qmgr_request_queue(queue, len, nearly_empty_watermark, \ |
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nearly_full_watermark) |
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#endif |
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#endif
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