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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2023 Cai Huoqing
* Synopsys DesignWare HDMA v0 debugfs
*
* Author: Cai Huoqing <cai.huoqing@linux.dev>
*/
#include <linux/debugfs.h>
#include <linux/bitfield.h>
#include "dw-hdma-v0-debugfs.h"
#include "dw-hdma-v0-regs.h"
#include "dw-edma-core.h"
#define REGS_ADDR(dw, name) \
({ \
struct dw_hdma_v0_regs __iomem *__regs = (dw)->chip->reg_base; \
\
(void __iomem *)&__regs->name; \
})
#define REGS_CH_ADDR(dw, name, _dir, _ch) \
({ \
struct dw_hdma_v0_ch_regs __iomem *__ch_regs; \
\
if (_dir == EDMA_DIR_READ) \
__ch_regs = REGS_ADDR(dw, ch[_ch].rd); \
else \
__ch_regs = REGS_ADDR(dw, ch[_ch].wr); \
\
(void __iomem *)&__ch_regs->name; \
})
#define CTX_REGISTER(dw, name, dir, ch) \
{#name, REGS_CH_ADDR(dw, name, dir, ch)}
#define WRITE_STR "write"
#define READ_STR "read"
#define CHANNEL_STR "channel"
#define REGISTERS_STR "registers"
struct dw_hdma_debugfs_entry {
const char *name;
void __iomem *reg;
};
static int dw_hdma_debugfs_u32_get(void *data, u64 *val)
{
struct dw_hdma_debugfs_entry *entry = data;
void __iomem *reg = entry->reg;
*val = readl(reg);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, dw_hdma_debugfs_u32_get, NULL, "0x%08llx\n");
static void dw_hdma_debugfs_create_x32(struct dw_edma *dw,
const struct dw_hdma_debugfs_entry ini[],
int nr_entries, struct dentry *dent)
{
struct dw_hdma_debugfs_entry *entries;
int i;
entries = devm_kcalloc(dw->chip->dev, nr_entries, sizeof(*entries),
GFP_KERNEL);
if (!entries)
return;
for (i = 0; i < nr_entries; i++) {
entries[i] = ini[i];
debugfs_create_file_unsafe(entries[i].name, 0444, dent,
&entries[i], &fops_x32);
}
}
static void dw_hdma_debugfs_regs_ch(struct dw_edma *dw, enum dw_edma_dir dir,
u16 ch, struct dentry *dent)
{
const struct dw_hdma_debugfs_entry debugfs_regs[] = {
CTX_REGISTER(dw, ch_en, dir, ch),
CTX_REGISTER(dw, doorbell, dir, ch),
CTX_REGISTER(dw, prefetch, dir, ch),
CTX_REGISTER(dw, handshake, dir, ch),
CTX_REGISTER(dw, llp.lsb, dir, ch),
CTX_REGISTER(dw, llp.msb, dir, ch),
CTX_REGISTER(dw, cycle_sync, dir, ch),
CTX_REGISTER(dw, transfer_size, dir, ch),
CTX_REGISTER(dw, sar.lsb, dir, ch),
CTX_REGISTER(dw, sar.msb, dir, ch),
CTX_REGISTER(dw, dar.lsb, dir, ch),
CTX_REGISTER(dw, dar.msb, dir, ch),
CTX_REGISTER(dw, watermark_en, dir, ch),
CTX_REGISTER(dw, control1, dir, ch),
CTX_REGISTER(dw, func_num, dir, ch),
CTX_REGISTER(dw, qos, dir, ch),
CTX_REGISTER(dw, ch_stat, dir, ch),
CTX_REGISTER(dw, int_stat, dir, ch),
CTX_REGISTER(dw, int_setup, dir, ch),
CTX_REGISTER(dw, int_clear, dir, ch),
CTX_REGISTER(dw, msi_stop.lsb, dir, ch),
CTX_REGISTER(dw, msi_stop.msb, dir, ch),
CTX_REGISTER(dw, msi_watermark.lsb, dir, ch),
CTX_REGISTER(dw, msi_watermark.msb, dir, ch),
CTX_REGISTER(dw, msi_abort.lsb, dir, ch),
CTX_REGISTER(dw, msi_abort.msb, dir, ch),
CTX_REGISTER(dw, msi_msgdata, dir, ch),
};
int nr_entries = ARRAY_SIZE(debugfs_regs);
dw_hdma_debugfs_create_x32(dw, debugfs_regs, nr_entries, dent);
}
static void dw_hdma_debugfs_regs_wr(struct dw_edma *dw, struct dentry *dent)
{
struct dentry *regs_dent, *ch_dent;
char name[32];
int i;
regs_dent = debugfs_create_dir(WRITE_STR, dent);
for (i = 0; i < dw->wr_ch_cnt; i++) {
snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i);
ch_dent = debugfs_create_dir(name, regs_dent);
dw_hdma_debugfs_regs_ch(dw, EDMA_DIR_WRITE, i, ch_dent);
}
}
static void dw_hdma_debugfs_regs_rd(struct dw_edma *dw, struct dentry *dent)
{
struct dentry *regs_dent, *ch_dent;
char name[32];
int i;
regs_dent = debugfs_create_dir(READ_STR, dent);
for (i = 0; i < dw->rd_ch_cnt; i++) {
snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i);
ch_dent = debugfs_create_dir(name, regs_dent);
dw_hdma_debugfs_regs_ch(dw, EDMA_DIR_READ, i, ch_dent);
}
}
static void dw_hdma_debugfs_regs(struct dw_edma *dw)
{
struct dentry *regs_dent;
regs_dent = debugfs_create_dir(REGISTERS_STR, dw->dma.dbg_dev_root);
dw_hdma_debugfs_regs_wr(dw, regs_dent);
dw_hdma_debugfs_regs_rd(dw, regs_dent);
}
void dw_hdma_v0_debugfs_on(struct dw_edma *dw)
{
if (!debugfs_initialized())
return;
debugfs_create_u32("mf", 0444, dw->dma.dbg_dev_root, &dw->chip->mf);
debugfs_create_u16("wr_ch_cnt", 0444, dw->dma.dbg_dev_root, &dw->wr_ch_cnt);
debugfs_create_u16("rd_ch_cnt", 0444, dw->dma.dbg_dev_root, &dw->rd_ch_cnt);
dw_hdma_debugfs_regs(dw);
}
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