mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
dmaengine: dw-edma: Add HDMA DebugFS support
Add HDMA DebugFS support to show registers content Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev> Reviewed-by: Serge Semin <fancer.lancer@gmail.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Tested-by: Serge Semin <fancer.lancer@gmail.com> Link: https://lore.kernel.org/r/20230520050854.73160-5-cai.huoqing@linux.dev Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Cai Huoqing
Vinod Koul
parent
e74c39573d
commit
353d5c241e
@ -1,7 +1,8 @@
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
obj-$(CONFIG_DW_EDMA) += dw-edma.o
|
||||
dw-edma-$(CONFIG_DEBUG_FS) := dw-edma-v0-debugfs.o
|
||||
dw-edma-$(CONFIG_DEBUG_FS) := dw-edma-v0-debugfs.o \
|
||||
dw-hdma-v0-debugfs.o
|
||||
dw-edma-objs := dw-edma-core.o \
|
||||
dw-edma-v0-core.o \
|
||||
dw-hdma-v0-core.o $(dw-edma-y)
|
||||
|
||||
@ -11,6 +11,7 @@
|
||||
#include "dw-edma-core.h"
|
||||
#include "dw-hdma-v0-core.h"
|
||||
#include "dw-hdma-v0-regs.h"
|
||||
#include "dw-hdma-v0-debugfs.h"
|
||||
|
||||
enum dw_hdma_control {
|
||||
DW_HDMA_V0_CB = BIT(0),
|
||||
@ -276,6 +277,7 @@ static void dw_hdma_v0_core_ch_config(struct dw_edma_chan *chan)
|
||||
/* HDMA debugfs callbacks */
|
||||
static void dw_hdma_v0_core_debugfs_on(struct dw_edma *dw)
|
||||
{
|
||||
dw_hdma_v0_debugfs_on(dw);
|
||||
}
|
||||
|
||||
static const struct dw_edma_core_ops dw_hdma_v0_core = {
|
||||
|
||||
170
drivers/dma/dw-edma/dw-hdma-v0-debugfs.c
Normal file
170
drivers/dma/dw-edma/dw-hdma-v0-debugfs.c
Normal file
@ -0,0 +1,170 @@
|
||||
// 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[16];
|
||||
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[16];
|
||||
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);
|
||||
}
|
||||
22
drivers/dma/dw-edma/dw-hdma-v0-debugfs.h
Normal file
22
drivers/dma/dw-edma/dw-hdma-v0-debugfs.h
Normal file
@ -0,0 +1,22 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* Copyright (c) 2023 Cai Huoqing
|
||||
* Synopsys DesignWare HDMA v0 debugfs
|
||||
*
|
||||
* Author: Cai Huoqing <cai.huoqing@linux.dev>
|
||||
*/
|
||||
|
||||
#ifndef _DW_HDMA_V0_DEBUG_FS_H
|
||||
#define _DW_HDMA_V0_DEBUG_FS_H
|
||||
|
||||
#include <linux/dma/edma.h>
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
void dw_hdma_v0_debugfs_on(struct dw_edma *dw);
|
||||
#else
|
||||
static inline void dw_hdma_v0_debugfs_on(struct dw_edma *dw)
|
||||
{
|
||||
}
|
||||
#endif /* CONFIG_DEBUG_FS */
|
||||
|
||||
#endif /* _DW_HDMA_V0_DEBUG_FS_H */
|
||||
Loading…
Reference in New Issue
Block a user