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
