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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2023 Cai Huoqing4 * Synopsys DesignWare HDMA v0 debugfs5 *6 * Author: Cai Huoqing <cai.huoqing@linux.dev>7 */8 9#include <linux/debugfs.h>10#include <linux/bitfield.h>11 12#include "dw-hdma-v0-debugfs.h"13#include "dw-hdma-v0-regs.h"14#include "dw-edma-core.h"15 16#define REGS_ADDR(dw, name) \17 ({ \18 struct dw_hdma_v0_regs __iomem *__regs = (dw)->chip->reg_base; \19 \20 (void __iomem *)&__regs->name; \21 })22 23#define REGS_CH_ADDR(dw, name, _dir, _ch) \24 ({ \25 struct dw_hdma_v0_ch_regs __iomem *__ch_regs; \26 \27 if (_dir == EDMA_DIR_READ) \28 __ch_regs = REGS_ADDR(dw, ch[_ch].rd); \29 else \30 __ch_regs = REGS_ADDR(dw, ch[_ch].wr); \31 \32 (void __iomem *)&__ch_regs->name; \33 })34 35#define CTX_REGISTER(dw, name, dir, ch) \36 {#name, REGS_CH_ADDR(dw, name, dir, ch)}37 38#define WRITE_STR "write"39#define READ_STR "read"40#define CHANNEL_STR "channel"41#define REGISTERS_STR "registers"42 43struct dw_hdma_debugfs_entry {44 const char *name;45 void __iomem *reg;46};47 48static int dw_hdma_debugfs_u32_get(void *data, u64 *val)49{50 struct dw_hdma_debugfs_entry *entry = data;51 void __iomem *reg = entry->reg;52 53 *val = readl(reg);54 55 return 0;56}57DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, dw_hdma_debugfs_u32_get, NULL, "0x%08llx\n");58 59static void dw_hdma_debugfs_create_x32(struct dw_edma *dw,60 const struct dw_hdma_debugfs_entry ini[],61 int nr_entries, struct dentry *dent)62{63 struct dw_hdma_debugfs_entry *entries;64 int i;65 66 entries = devm_kcalloc(dw->chip->dev, nr_entries, sizeof(*entries),67 GFP_KERNEL);68 if (!entries)69 return;70 71 for (i = 0; i < nr_entries; i++) {72 entries[i] = ini[i];73 74 debugfs_create_file_unsafe(entries[i].name, 0444, dent,75 &entries[i], &fops_x32);76 }77}78 79static void dw_hdma_debugfs_regs_ch(struct dw_edma *dw, enum dw_edma_dir dir,80 u16 ch, struct dentry *dent)81{82 const struct dw_hdma_debugfs_entry debugfs_regs[] = {83 CTX_REGISTER(dw, ch_en, dir, ch),84 CTX_REGISTER(dw, doorbell, dir, ch),85 CTX_REGISTER(dw, prefetch, dir, ch),86 CTX_REGISTER(dw, handshake, dir, ch),87 CTX_REGISTER(dw, llp.lsb, dir, ch),88 CTX_REGISTER(dw, llp.msb, dir, ch),89 CTX_REGISTER(dw, cycle_sync, dir, ch),90 CTX_REGISTER(dw, transfer_size, dir, ch),91 CTX_REGISTER(dw, sar.lsb, dir, ch),92 CTX_REGISTER(dw, sar.msb, dir, ch),93 CTX_REGISTER(dw, dar.lsb, dir, ch),94 CTX_REGISTER(dw, dar.msb, dir, ch),95 CTX_REGISTER(dw, watermark_en, dir, ch),96 CTX_REGISTER(dw, control1, dir, ch),97 CTX_REGISTER(dw, func_num, dir, ch),98 CTX_REGISTER(dw, qos, dir, ch),99 CTX_REGISTER(dw, ch_stat, dir, ch),100 CTX_REGISTER(dw, int_stat, dir, ch),101 CTX_REGISTER(dw, int_setup, dir, ch),102 CTX_REGISTER(dw, int_clear, dir, ch),103 CTX_REGISTER(dw, msi_stop.lsb, dir, ch),104 CTX_REGISTER(dw, msi_stop.msb, dir, ch),105 CTX_REGISTER(dw, msi_watermark.lsb, dir, ch),106 CTX_REGISTER(dw, msi_watermark.msb, dir, ch),107 CTX_REGISTER(dw, msi_abort.lsb, dir, ch),108 CTX_REGISTER(dw, msi_abort.msb, dir, ch),109 CTX_REGISTER(dw, msi_msgdata, dir, ch),110 };111 int nr_entries = ARRAY_SIZE(debugfs_regs);112 113 dw_hdma_debugfs_create_x32(dw, debugfs_regs, nr_entries, dent);114}115 116static void dw_hdma_debugfs_regs_wr(struct dw_edma *dw, struct dentry *dent)117{118 struct dentry *regs_dent, *ch_dent;119 char name[32];120 int i;121 122 regs_dent = debugfs_create_dir(WRITE_STR, dent);123 124 for (i = 0; i < dw->wr_ch_cnt; i++) {125 snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i);126 127 ch_dent = debugfs_create_dir(name, regs_dent);128 129 dw_hdma_debugfs_regs_ch(dw, EDMA_DIR_WRITE, i, ch_dent);130 }131}132 133static void dw_hdma_debugfs_regs_rd(struct dw_edma *dw, struct dentry *dent)134{135 struct dentry *regs_dent, *ch_dent;136 char name[32];137 int i;138 139 regs_dent = debugfs_create_dir(READ_STR, dent);140 141 for (i = 0; i < dw->rd_ch_cnt; i++) {142 snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i);143 144 ch_dent = debugfs_create_dir(name, regs_dent);145 146 dw_hdma_debugfs_regs_ch(dw, EDMA_DIR_READ, i, ch_dent);147 }148}149 150static void dw_hdma_debugfs_regs(struct dw_edma *dw)151{152 struct dentry *regs_dent;153 154 regs_dent = debugfs_create_dir(REGISTERS_STR, dw->dma.dbg_dev_root);155 156 dw_hdma_debugfs_regs_wr(dw, regs_dent);157 dw_hdma_debugfs_regs_rd(dw, regs_dent);158}159 160void dw_hdma_v0_debugfs_on(struct dw_edma *dw)161{162 if (!debugfs_initialized())163 return;164 165 debugfs_create_u32("mf", 0444, dw->dma.dbg_dev_root, &dw->chip->mf);166 debugfs_create_u16("wr_ch_cnt", 0444, dw->dma.dbg_dev_root, &dw->wr_ch_cnt);167 debugfs_create_u16("rd_ch_cnt", 0444, dw->dma.dbg_dev_root, &dw->rd_ch_cnt);168 169 dw_hdma_debugfs_regs(dw);170}171