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