[PATCH] dmaengine: dw-edma: Add support for native HDMA

From: Cai Huoqing
Date: Wed Aug 24 2022 - 10:02:27 EST

Add support for HDMA NATIVE, as long the IP design has set
the compatible register map parameter-HDMA_NATIVE,
which allows compatibility for native HDMA register configuration.

The HDMA Hyper-DMA IP is an enhancement of the eDMA embedded-DMA IP.
And the native HDMA registers are different from eDMA,
so this patch add support for HDMA NATIVE mode

Signed-off-by: Cai Huoqing <cai.huoqing@xxxxxxxxx>
---
drivers/dma/dw-edma/Makefile | 4 +-
drivers/dma/dw-edma/dw-edma-core.c | 116 ++++++++---
drivers/dma/dw-edma/dw-edma-pcie.c | 5 +-
drivers/dma/dw-edma/dw-edma-v0-core.c | 3 +
drivers/dma/dw-edma/dw-hdma-v0-core.c | 236 +++++++++++++++++++++++
drivers/dma/dw-edma/dw-hdma-v0-core.h | 27 +++
drivers/dma/dw-edma/dw-hdma-v0-debugfs.c | 167 ++++++++++++++++
drivers/dma/dw-edma/dw-hdma-v0-debugfs.h | 25 +++
drivers/dma/dw-edma/dw-hdma-v0-regs.h | 94 +++++++++
include/linux/dma/edma.h | 3 +-
10 files changed, 646 insertions(+), 34 deletions(-)
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-core.c
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-core.h
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-debugfs.c
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-debugfs.h
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-regs.h

diff --git a/drivers/dma/dw-edma/Makefile b/drivers/dma/dw-edma/Makefile
index 8d45c0d5689d..95c5ae760a64 100644
--- a/drivers/dma/dw-edma/Makefile
+++ b/drivers/dma/dw-edma/Makefile
@@ -1,7 +1,9 @@
# 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-hdma-v0-core.o \
dw-edma-v0-core.o $(dw-edma-y)
obj-$(CONFIG_DW_EDMA_PCIE) += dw-edma-pcie.o
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 07f756479663..f0e44cb810d0 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -19,6 +19,7 @@

#include "dw-edma-core.h"
#include "dw-edma-v0-core.h"
+#include "dw-hdma-v0-core.h"
#include "../dmaengine.h"
#include "../virt-dma.h"

@@ -176,6 +177,7 @@ static void dw_edma_start_transfer(struct dw_edma_chan *chan)
struct dw_edma_chunk *child;
struct dw_edma_desc *desc;
struct virt_dma_desc *vd;
+ struct dw_edma *dw = chan->dw;

vd = vchan_next_desc(&chan->vc);
if (!vd)
@@ -190,7 +192,11 @@ static void dw_edma_start_transfer(struct dw_edma_chan *chan)
if (!child)
return;

- dw_edma_v0_core_start(child, !desc->xfer_sz);
+ if (dw->chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_start(child, !desc->xfer_sz);
+ else
+ dw_edma_v0_core_start(child, !desc->xfer_sz);
+
desc->xfer_sz += child->ll_region.sz;
dw_edma_free_burst(child);
list_del(&child->list);
@@ -248,8 +254,15 @@ static int dw_edma_device_resume(struct dma_chan *dchan)
static int dw_edma_device_terminate_all(struct dma_chan *dchan)
{
struct dw_edma_chan *chan = dchan2dw_edma_chan(dchan);
+ struct dw_edma *dw = chan->dw;
+ enum dma_status status;
int err = 0;

+ if (dw->chip->mf == EDMA_MF_HDMA_NATIVE)
+ status = dw_hdma_v0_core_ch_status(chan);
+ else
+ status = dw_edma_v0_core_ch_status(chan);
+
if (!chan->configured) {
/* Do nothing */
} else if (chan->status == EDMA_ST_PAUSE) {
@@ -257,7 +270,7 @@ static int dw_edma_device_terminate_all(struct dma_chan *dchan)
chan->configured = false;
} else if (chan->status == EDMA_ST_IDLE) {
chan->configured = false;
- } else if (dw_edma_v0_core_ch_status(chan) == DMA_COMPLETE) {
+ } else if (status == DMA_COMPLETE) {
/*
* The channel is in a false BUSY state, probably didn't
* receive or lost an interrupt
@@ -557,11 +570,15 @@ dw_edma_device_prep_interleaved_dma(struct dma_chan *dchan,

static void dw_edma_done_interrupt(struct dw_edma_chan *chan)
{
+ struct dw_edma *dw = chan->dw;
struct dw_edma_desc *desc;
struct virt_dma_desc *vd;
unsigned long flags;

- dw_edma_v0_core_clear_done_int(chan);
+ if (dw->chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_clear_done_int(chan);
+ else
+ dw_edma_v0_core_clear_done_int(chan);

spin_lock_irqsave(&chan->vc.lock, flags);
vd = vchan_next_desc(&chan->vc);
@@ -601,9 +618,13 @@ static void dw_edma_done_interrupt(struct dw_edma_chan *chan)
static void dw_edma_abort_interrupt(struct dw_edma_chan *chan)
{
struct virt_dma_desc *vd;
+ struct dw_edma *dw = chan->dw;
unsigned long flags;

- dw_edma_v0_core_clear_abort_int(chan);
+ if (dw->chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_clear_abort_int(chan);
+ else
+ dw_edma_v0_core_clear_abort_int(chan);

spin_lock_irqsave(&chan->vc.lock, flags);
vd = vchan_next_desc(&chan->vc);
@@ -620,9 +641,8 @@ static irqreturn_t dw_edma_interrupt(int irq, void *data, bool write)
{
struct dw_edma_irq *dw_irq = data;
struct dw_edma *dw = dw_irq->dw;
- unsigned long total, pos, val;
+ unsigned long total, pos, val, mask;
unsigned long off;
- u32 mask;

if (write) {
total = dw->wr_ch_cnt;
@@ -634,24 +654,36 @@ static irqreturn_t dw_edma_interrupt(int irq, void *data, bool write)
mask = dw_irq->rd_mask;
}

- val = dw_edma_v0_core_status_done_int(dw, write ?
- EDMA_DIR_WRITE :
- EDMA_DIR_READ);
- val &= mask;
- for_each_set_bit(pos, &val, total) {
- struct dw_edma_chan *chan = &dw->chan[pos + off];
+ if (dw->chip->mf == EDMA_MF_HDMA_NATIVE) {
+ for_each_set_bit(pos, &mask, total) {
+ struct dw_edma_chan *chan = &dw->chan[pos + off];

- dw_edma_done_interrupt(chan);
- }
+ val = dw_hdma_v0_core_status_int(chan);
+ if (dw_hdma_v0_core_check_done_int(val))
+ dw_edma_done_interrupt(chan);
+ if (dw_hdma_v0_core_check_abort_int(val))
+ dw_edma_abort_interrupt(chan);
+ }
+ } else {
+ val = dw_edma_v0_core_status_done_int(dw, write ?
+ EDMA_DIR_WRITE :
+ EDMA_DIR_READ);
+ val &= mask;
+ for_each_set_bit(pos, &val, total) {
+ struct dw_edma_chan *chan = &dw->chan[pos + off];
+
+ dw_edma_done_interrupt(chan);
+ }

- val = dw_edma_v0_core_status_abort_int(dw, write ?
- EDMA_DIR_WRITE :
- EDMA_DIR_READ);
- val &= mask;
- for_each_set_bit(pos, &val, total) {
- struct dw_edma_chan *chan = &dw->chan[pos + off];
+ val = dw_edma_v0_core_status_abort_int(dw, write ?
+ EDMA_DIR_WRITE :
+ EDMA_DIR_READ);
+ val &= mask;
+ for_each_set_bit(pos, &val, total) {
+ struct dw_edma_chan *chan = &dw->chan[pos + off];

- dw_edma_abort_interrupt(chan);
+ dw_edma_abort_interrupt(chan);
+ }
}

return IRQ_HANDLED;
@@ -794,7 +826,10 @@ static int dw_edma_channel_setup(struct dw_edma *dw, bool write,
dt_region->sz = chip->dt_region_rd[j].sz;
}

- dw_edma_v0_core_device_config(chan);
+ if (dw->chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_device_config(chan);
+ else
+ dw_edma_v0_core_device_config(chan);
}

/* Set DMA channel capabilities */
@@ -937,13 +972,23 @@ int dw_edma_probe(struct dw_edma_chip *chip)

raw_spin_lock_init(&dw->lock);

- dw->wr_ch_cnt = min_t(u16, chip->ll_wr_cnt,
- dw_edma_v0_core_ch_count(dw, EDMA_DIR_WRITE));
- dw->wr_ch_cnt = min_t(u16, dw->wr_ch_cnt, EDMA_MAX_WR_CH);
+ if (chip->mf == EDMA_MF_HDMA_NATIVE) {
+ dw->wr_ch_cnt = min_t(u16, chip->ll_wr_cnt,
+ dw_hdma_v0_core_ch_count(dw, EDMA_DIR_WRITE));
+ dw->wr_ch_cnt = min_t(u16, dw->wr_ch_cnt, EDMA_MAX_WR_CH);

- dw->rd_ch_cnt = min_t(u16, chip->ll_rd_cnt,
- dw_edma_v0_core_ch_count(dw, EDMA_DIR_READ));
- dw->rd_ch_cnt = min_t(u16, dw->rd_ch_cnt, EDMA_MAX_RD_CH);
+ dw->rd_ch_cnt = min_t(u16, chip->ll_rd_cnt,
+ dw_hdma_v0_core_ch_count(dw, EDMA_DIR_READ));
+ dw->rd_ch_cnt = min_t(u16, dw->rd_ch_cnt, EDMA_MAX_RD_CH);
+ } else {
+ dw->wr_ch_cnt = min_t(u16, chip->ll_wr_cnt,
+ dw_edma_v0_core_ch_count(dw, EDMA_DIR_WRITE));
+ dw->wr_ch_cnt = min_t(u16, dw->wr_ch_cnt, EDMA_MAX_WR_CH);
+
+ dw->rd_ch_cnt = min_t(u16, chip->ll_rd_cnt,
+ dw_edma_v0_core_ch_count(dw, EDMA_DIR_READ));
+ dw->rd_ch_cnt = min_t(u16, dw->rd_ch_cnt, EDMA_MAX_RD_CH);
+ }

if (!dw->wr_ch_cnt && !dw->rd_ch_cnt)
return -EINVAL;
@@ -960,7 +1005,10 @@ int dw_edma_probe(struct dw_edma_chip *chip)
snprintf(dw->name, sizeof(dw->name), "dw-edma-core:%d", chip->id);

/* Disable eDMA, only to establish the ideal initial conditions */
- dw_edma_v0_core_off(dw);
+ if (chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_off(dw);
+ else
+ dw_edma_v0_core_off(dw);

/* Request IRQs */
err = dw_edma_irq_request(dw, &wr_alloc, &rd_alloc);
@@ -981,7 +1029,10 @@ int dw_edma_probe(struct dw_edma_chip *chip)
pm_runtime_enable(dev);

/* Turn debugfs on */
- dw_edma_v0_core_debugfs_on(dw);
+ if (chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_debugfs_on(dw);
+ else
+ dw_edma_v0_core_debugfs_on(dw);

chip->dw = dw;

@@ -1028,7 +1079,10 @@ int dw_edma_remove(struct dw_edma_chip *chip)
}

/* Turn debugfs off */
- dw_edma_v0_core_debugfs_off(dw);
+ if (chip->mf == EDMA_MF_HDMA_NATIVE)
+ dw_hdma_v0_core_debugfs_off(dw);
+ else
+ dw_edma_v0_core_debugfs_off(dw);

return 0;
}
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index d6b5e2463884..7cd2e045325d 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -121,7 +121,8 @@ static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev,
map = FIELD_GET(DW_PCIE_VSEC_DMA_MAP, val);
if (map != EDMA_MF_EDMA_LEGACY &&
map != EDMA_MF_EDMA_UNROLL &&
- map != EDMA_MF_HDMA_COMPAT)
+ map != EDMA_MF_HDMA_COMPAT &&
+ map != EDMA_MF_HDMA_NATIVE)
return;

pdata->mf = map;
@@ -277,6 +278,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
pci_dbg(pdev, "Version:\teDMA Unroll (0x%x)\n", chip->mf);
else if (chip->mf == EDMA_MF_HDMA_COMPAT)
pci_dbg(pdev, "Version:\tHDMA Compatible (0x%x)\n", chip->mf);
+ else if (chip->mf == EDMA_MF_HDMA_NATIVE)
+ pci_dbg(pdev, "Version:\tHDMA Native (0x%x)\n", chip->mf);
else
pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", chip->mf);

diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c
index 77e6cfe52e0a..167a2c4144dd 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -12,6 +12,9 @@
#include "dw-edma-v0-core.h"
#include "dw-edma-v0-regs.h"
#include "dw-edma-v0-debugfs.h"
+#include "dw-hdma-v0-core.h"
+#include "dw-hdma-v0-regs.h"
+#include "dw-hdma-v0-debugfs.h"

enum dw_edma_control {
DW_EDMA_V0_CB = BIT(0),
diff --git a/drivers/dma/dw-edma/dw-hdma-v0-core.c b/drivers/dma/dw-edma/dw-hdma-v0-core.c
new file mode 100644
index 000000000000..cd4746d98839
--- /dev/null
+++ b/drivers/dma/dw-edma/dw-hdma-v0-core.c
@@ -0,0 +1,236 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 Cai Huoqing
+ * Synopsys DesignWare HDMA v0 core
+ */
+
+#include <linux/bitfield.h>
+
+#include "dw-edma-core.h"
+#include "dw-edma-v0-core.h"
+#include "dw-edma-v0-regs.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),
+ DW_HDMA_V0_TCB = BIT(1),
+ DW_HDMA_V0_LLP = BIT(2),
+ DW_HDMA_V0_LIE = BIT(3),
+ DW_HDMA_V0_RIE = BIT(4),
+ DW_HDMA_V0_CCS = BIT(8),
+ DW_HDMA_V0_LLE = BIT(9),
+};
+static inline struct dw_hdma_v0_regs __iomem *__dw_regs(struct dw_edma *dw)
+{
+ return dw->chip->reg_base;
+}
+
+static inline struct dw_hdma_v0_ch_regs __iomem *
+__dw_ch_regs(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch)
+{
+
+ if (dir == EDMA_DIR_WRITE)
+ return &(__dw_regs(dw)->ch[ch].wr);
+ else
+ return &(__dw_regs(dw)->ch[ch].rd);
+}
+
+#define SET_CH_32(dw, dir, ch, name, value) \
+ writel(value, &(__dw_ch_regs(dw, dir, ch)->name))
+
+#define GET_CH_32(dw, dir, ch, name) \
+ readl(&(__dw_ch_regs(dw, dir, ch)->name))
+
+#define SET_BOTH_CH_32(dw, ch, name, value) \
+ do { \
+ writel(value, &(__dw_ch_regs(dw, EDMA_DIR_WRITE, ch)->name)); \
+ writel(value, &(__dw_ch_regs(dw, EDMA_DIR_READ, ch)->name)); \
+ } while (0)
+
+#define SET_LL_32(ll, value) \
+ writel(value, ll)
+
+/* HDMA management callbacks */
+void dw_hdma_v0_core_off(struct dw_edma *dw)
+{
+ int id;
+
+ for (id = 0; id < HDMA_V0_MAX_NR_CH; id++) {
+ SET_BOTH_CH_32(dw, id, int_setup,
+ HDMA_V0_STOP_INT_MASK | HDMA_V0_ABORT_INT_MASK);
+ SET_BOTH_CH_32(dw, id, int_clear,
+ HDMA_V0_STOP_INT_MASK & HDMA_V0_ABORT_INT_MASK);
+ SET_BOTH_CH_32(dw, id, ch_en, 0);
+ }
+}
+
+u16 dw_hdma_v0_core_ch_count(struct dw_edma *dw, enum dw_edma_dir dir)
+{
+ u32 num_ch = 0;
+ int id;
+
+ for (id = 0; id < HDMA_V0_MAX_NR_CH; id++) {
+ if (GET_CH_32(dw, id, dir, ch_en) & BIT(0))
+ num_ch++;
+ }
+
+ if (num_ch > HDMA_V0_MAX_NR_CH)
+ num_ch = HDMA_V0_MAX_NR_CH;
+
+ return (u16)num_ch;
+}
+
+enum dma_status dw_hdma_v0_core_ch_status(struct dw_edma_chan *chan)
+{
+ struct dw_edma *dw = chan->dw;
+ u32 tmp;
+
+ tmp = FIELD_GET(HDMA_V0_CH_STATUS_MASK,
+ GET_CH_32(dw, chan->id, chan->dir, ch_stat));
+
+ if (tmp == 1)
+ return DMA_IN_PROGRESS;
+ else if (tmp == 3)
+ return DMA_COMPLETE;
+ else
+ return DMA_ERROR;
+}
+
+void dw_hdma_v0_core_clear_done_int(struct dw_edma_chan *chan)
+{
+ struct dw_edma *dw = chan->dw;
+
+ SET_CH_32(dw, chan->dir, chan->id, int_clear, HDMA_V0_STOP_INT_MASK);
+}
+
+void dw_hdma_v0_core_clear_abort_int(struct dw_edma_chan *chan)
+{
+ struct dw_edma *dw = chan->dw;
+
+ SET_CH_32(dw, chan->dir, chan->id, int_clear, HDMA_V0_ABORT_INT_MASK);
+}
+
+u32 dw_hdma_v0_core_status_int(struct dw_edma_chan *chan)
+{
+ struct dw_edma *dw = chan->dw;
+
+ return GET_CH_32(dw, chan->dir, chan->id, int_stat);
+}
+
+u32 dw_hdma_v0_core_check_done_int(u32 val)
+{
+ return (FIELD_GET(HDMA_V0_STOP_INT_MASK, val) == BIT(0));
+}
+
+u32 dw_hdma_v0_core_check_abort_int(u32 val)
+{
+ return (FIELD_GET(HDMA_V0_ABORT_INT_MASK, val) == BIT(0));
+}
+
+static void dw_hdma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
+{
+ struct dw_edma_burst *child;
+ struct dw_edma_chan *chan = chunk->chan;
+ struct dw_edma_v0_lli __iomem *lli;
+ struct dw_edma_v0_llp __iomem *llp;
+ u32 control = 0, i = 0;
+ int j;
+
+ lli = chunk->ll_region.vaddr;
+
+ if (chunk->cb)
+ control = DW_HDMA_V0_CB;
+
+ j = chunk->bursts_alloc;
+ list_for_each_entry(child, &chunk->burst->list, list) {
+ j--;
+ if (!j) {
+ control |= DW_HDMA_V0_LIE;
+ if (!(chan->dw->chip->flags & DW_EDMA_CHIP_LOCAL))
+ control |= DW_HDMA_V0_RIE;
+ }
+ /* Channel control */
+ SET_LL_32(&lli[i].control, control);
+ /* Transfer size */
+ SET_LL_32(&lli[i].transfer_size, child->sz);
+ /* SAR */
+ SET_LL_32(&lli[i].sar.lsb, lower_32_bits(child->sar));
+ SET_LL_32(&lli[i].sar.msb, upper_32_bits(child->sar));
+ /* DAR */
+ SET_LL_32(&lli[i].dar.lsb, lower_32_bits(child->dar));
+ SET_LL_32(&lli[i].dar.msb, upper_32_bits(child->dar));
+ i++;
+ }
+
+ llp = (void __iomem *)&lli[i];
+ control = DW_HDMA_V0_LLP | DW_HDMA_V0_TCB;
+ if (!chunk->cb)
+ control |= DW_HDMA_V0_CB;
+
+ /* Channel control */
+ SET_LL_32(&llp->control, control);
+ /* Linked list */
+ SET_LL_32(&llp->llp.lsb, lower_32_bits(chunk->ll_region.paddr));
+ SET_LL_32(&llp->llp.msb, upper_32_bits(chunk->ll_region.paddr));
+}
+
+void dw_hdma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
+{
+ struct dw_edma_chan *chan = chunk->chan;
+ struct dw_edma *dw = chan->dw;
+ u32 tmp;
+
+ dw_hdma_v0_core_write_chunk(chunk);
+
+ if (first) {
+ /* Enable engine */
+ SET_CH_32(dw, chan->dir, chan->id, ch_en, BIT(0));
+ /* Interrupt enable&unmask - done, abort */
+ tmp = GET_CH_32(dw, chan->dir, chan->id, int_setup);
+ tmp |= HDMA_V0_STOP_INT_MASK;
+ tmp |= HDMA_V0_ABORT_INT_MASK;
+ tmp |= HDMA_V0_LOCAL_ABORT_INT_EN;
+ tmp |= HDMA_V0_LOCAL_STOP_INT_EN;
+ SET_CH_32(dw, chan->dir, chan->id, int_setup, tmp);
+ /* Channel control */
+ SET_CH_32(dw, chan->dir, chan->id, control1, HDMA_V0_LINKLIST_EN);
+ /* Linked list */
+ /* llp is not aligned on 64bit -> keep 32bit accesses */
+ SET_CH_32(dw, chan->dir, chan->id, llp.lsb,
+ lower_32_bits(chunk->ll_region.paddr));
+ SET_CH_32(dw, chan->dir, chan->id, llp.msb,
+ upper_32_bits(chunk->ll_region.paddr));
+ }
+ /* Doorbell */
+ SET_CH_32(dw, chan->dir, chan->id, doorbell, HDMA_V0_DOORBELL_START);
+}
+
+int dw_hdma_v0_core_device_config(struct dw_edma_chan *chan)
+{
+ struct dw_edma *dw = chan->dw;
+
+ /* MSI done addr - low, high */
+ SET_CH_32(dw, chan->dir, chan->id, msi_stop.lsb, chan->msi.address_lo);
+ SET_CH_32(dw, chan->dir, chan->id, msi_stop.msb, chan->msi.address_hi);
+ /* MSI abort addr - low, high */
+ SET_CH_32(dw, chan->dir, chan->id, msi_abort.lsb, chan->msi.address_lo);
+ SET_CH_32(dw, chan->dir, chan->id, msi_abort.msb, chan->msi.address_hi);
+ SET_CH_32(dw, chan->dir, chan->id, msi_abort.msb, chan->msi.address_hi);
+ /* config MSI data */
+ SET_CH_32(dw, chan->dir, chan->id, msi_msgdata, chan->msi.data);
+
+ return 0;
+}
+
+/* eDMA debugfs callbacks */
+void dw_hdma_v0_core_debugfs_on(struct dw_edma *dw)
+{
+ dw_hdma_v0_debugfs_on(dw);
+}
+
+void dw_hdma_v0_core_debugfs_off(struct dw_edma *dw)
+{
+ dw_hdma_v0_debugfs_off(dw);
+}
diff --git a/drivers/dma/dw-edma/dw-hdma-v0-core.h b/drivers/dma/dw-edma/dw-hdma-v0-core.h
new file mode 100644
index 000000000000..61d3a6d9d024
--- /dev/null
+++ b/drivers/dma/dw-edma/dw-hdma-v0-core.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Cai Huoqing
+ * Synopsys DesignWare eDMA v0 core
+ */
+
+#ifndef _DW_HDMA_V0_CORE_H
+#define _DW_HDMA_V0_CORE_H
+
+#include <linux/dma/edma.h>
+
+/* HDMA management callbacks */
+void dw_hdma_v0_core_off(struct dw_edma *chan);
+u16 dw_hdma_v0_core_ch_count(struct dw_edma *chan, enum dw_edma_dir dir);
+enum dma_status dw_hdma_v0_core_ch_status(struct dw_edma_chan *chan);
+void dw_hdma_v0_core_clear_done_int(struct dw_edma_chan *chan);
+void dw_hdma_v0_core_clear_abort_int(struct dw_edma_chan *chan);
+u32 dw_hdma_v0_core_status_int(struct dw_edma_chan *chan);
+u32 dw_hdma_v0_core_check_done_int(u32 val);
+u32 dw_hdma_v0_core_check_abort_int(u32 val);
+void dw_hdma_v0_core_start(struct dw_edma_chunk *chunk, bool first);
+int dw_hdma_v0_core_device_config(struct dw_edma_chan *chan);
+/* HDMA debug fs callbacks */
+void dw_hdma_v0_core_debugfs_on(struct dw_edma *dw);
+void dw_hdma_v0_core_debugfs_off(struct dw_edma *dw);
+
+#endif /* _DW_HDMA_V0_CORE_H */
diff --git a/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c b/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c
new file mode 100644
index 000000000000..2f1ddac9513b
--- /dev/null
+++ b/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 Cai Huoqing
+ * Synopsys DesignWare HDMA v0 debugfs
+ */
+
+#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(name) \
+ ((void __force *)&regs->name)
+
+#define REGISTER(name) \
+ { #name, REGS_ADDR(name) }
+
+#define WRITE_STR "write"
+#define READ_STR "read"
+#define CHANNEL_STR "channel"
+#define REGISTERS_STR "registers"
+
+static struct dw_edma *dw;
+static struct dw_hdma_v0_regs __iomem *regs;
+struct debugfs_entries {
+ const char *name;
+ dma_addr_t *reg;
+};
+
+static int dw_hdma_debugfs_u32_get(void *data, u64 *val)
+{
+ void __iomem *reg = (void __force __iomem *)data;
+ *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(const struct debugfs_entries entries[],
+ int nr_entries, struct dentry *dir)
+{
+ int i;
+
+ for (i = 0; i < nr_entries; i++) {
+ if (!debugfs_create_file_unsafe(entries[i].name, 0444, dir,
+ entries[i].reg, &fops_x32))
+ break;
+ }
+}
+
+static void dw_hdma_debugfs_regs_ch(struct dw_hdma_v0_ch_regs __iomem *regs,
+ struct dentry *dir)
+{
+ int nr_entries;
+ const struct debugfs_entries debugfs_regs[] = {
+ REGISTER(ch_en),
+ REGISTER(doorbell),
+ REGISTER(llp.lsb),
+ REGISTER(llp.msb),
+ REGISTER(cycle_sync),
+ REGISTER(transfer_size),
+ REGISTER(sar.lsb),
+ REGISTER(sar.msb),
+ REGISTER(dar.lsb),
+ REGISTER(dar.msb),
+ REGISTER(control1),
+ REGISTER(ch_stat),
+ REGISTER(int_stat),
+ REGISTER(int_setup),
+ REGISTER(int_clear),
+ REGISTER(msi_stop.lsb),
+ REGISTER(msi_stop.msb),
+ REGISTER(msi_abort.lsb),
+ REGISTER(msi_abort.msb),
+ REGISTER(msi_msgdata),
+ };
+
+ nr_entries = ARRAY_SIZE(debugfs_regs);
+ dw_hdma_debugfs_create_x32(debugfs_regs, nr_entries, dir);
+}
+
+static void dw_hdma_debugfs_regs_wr(struct dentry *dir)
+{
+ struct dentry *regs_dir, *ch_dir;
+ int i;
+ char name[16];
+
+ regs_dir = debugfs_create_dir(WRITE_STR, dir);
+ if (!regs_dir)
+ return;
+
+ for (i = 0; i < dw->wr_ch_cnt; i++) {
+ snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i);
+
+ ch_dir = debugfs_create_dir(name, regs_dir);
+ if (!ch_dir)
+ return;
+
+ dw_hdma_debugfs_regs_ch(&regs->ch[i].wr, ch_dir);
+ }
+}
+
+static void dw_hdma_debugfs_regs_rd(struct dentry *dir)
+{
+ struct dentry *regs_dir, *ch_dir;
+ int i;
+ char name[16];
+
+ regs_dir = debugfs_create_dir(READ_STR, dir);
+ if (!regs_dir)
+ return;
+
+ for (i = 0; i < dw->rd_ch_cnt; i++) {
+ snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i);
+
+ ch_dir = debugfs_create_dir(name, regs_dir);
+ if (!ch_dir)
+ return;
+
+ dw_hdma_debugfs_regs_ch(&regs->ch[i].rd, ch_dir);
+ }
+}
+
+static void dw_hdma_debugfs_regs(void)
+{
+ struct dentry *regs_dir;
+
+ regs_dir = debugfs_create_dir(REGISTERS_STR, dw->debugfs);
+ if (!regs_dir)
+ return;
+
+ dw_hdma_debugfs_regs_wr(regs_dir);
+ dw_hdma_debugfs_regs_rd(regs_dir);
+}
+
+void dw_hdma_v0_debugfs_on(struct dw_edma *_dw)
+{
+ dw = _dw;
+ if (!dw)
+ return;
+
+ regs = dw->chip->reg_base;
+ if (!regs)
+ return;
+
+ dw->debugfs = debugfs_create_dir(dw->name, NULL);
+ if (!dw->debugfs)
+ return;
+
+ debugfs_create_u32("mf", 0444, dw->debugfs, &dw->chip->mf);
+ debugfs_create_u16("wr_ch_cnt", 0444, dw->debugfs, &dw->wr_ch_cnt);
+ debugfs_create_u16("rd_ch_cnt", 0444, dw->debugfs, &dw->rd_ch_cnt);
+
+ dw_hdma_debugfs_regs();
+}
+
+void dw_hdma_v0_debugfs_off(struct dw_edma *_dw)
+{
+ dw = _dw;
+ if (!dw)
+ return;
+
+ debugfs_remove_recursive(dw->debugfs);
+ dw->debugfs = NULL;
+}
diff --git a/drivers/dma/dw-edma/dw-hdma-v0-debugfs.h b/drivers/dma/dw-edma/dw-hdma-v0-debugfs.h
new file mode 100644
index 000000000000..53bc7e93f4a0
--- /dev/null
+++ b/drivers/dma/dw-edma/dw-hdma-v0-debugfs.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Cai Huoqing
+ * Synopsys DesignWare HDMA v0 debugfs
+ */
+
+#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);
+void dw_hdma_v0_debugfs_off(struct dw_edma *dw);
+#else
+static inline void dw_hdma_v0_debugfs_on(struct dw_edma *dw)
+{
+}
+
+static inline void dw_hdma_v0_debugfs_off(struct dw_edma *dw)
+{
+}
+#endif /* CONFIG_DEBUG_FS */
+
+#endif /* _DW_HDMA_V0_DEBUG_FS_H */
diff --git a/drivers/dma/dw-edma/dw-hdma-v0-regs.h b/drivers/dma/dw-edma/dw-hdma-v0-regs.h
new file mode 100644
index 000000000000..2a2a3620d809
--- /dev/null
+++ b/drivers/dma/dw-edma/dw-hdma-v0-regs.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Cai Huoqing
+ * Synopsys DesignWare HDMA v0 reg
+ */
+
+#ifndef _DW_HDMA_V0_REGS_H
+#define _DW_HDMA_V0_REGS_H
+
+#include <linux/dmaengine.h>
+
+#define HDMA_V0_MAX_NR_CH 8
+#define HDMA_V0_LOCAL_ABORT_INT_EN BIT(6)
+#define HDMA_V0_REMOTE_ABORT_INT_EN BIT(5)
+#define HDMA_V0_LOCAL_STOP_INT_EN BIT(4)
+#define HDMA_V0_REMOTEL_STOP_INT_EN BIT(3)
+#define HDMA_V0_ABORT_INT_MASK BIT(2)
+#define HDMA_V0_STOP_INT_MASK BIT(0)
+#define HDMA_V0_LINKLIST_EN BIT(0)
+#define HDMA_V0_DOORBELL_START BIT(0)
+#define HDMA_V0_CH_STATUS_MASK GENMASK(1, 0)
+
+struct dw_hdma_v0_ch_regs {
+ u32 ch_en; /* 0x0000 */
+ u32 doorbell; /* 0x0004 */
+ u32 prefetch; /* 0x0008 */
+ u32 handshake; /* 0x000c */
+ union {
+ u64 reg; /* 0x0010..0x0014 */
+ struct {
+ u32 lsb; /* 0x0010 */
+ u32 msb; /* 0x0014 */
+ };
+ } llp;
+ u32 cycle_sync; /* 0x0018 */
+ u32 transfer_size; /* 0x001c */
+ union {
+ u64 reg; /* 0x0020..0x0024 */
+ struct {
+ u32 lsb; /* 0x0020 */
+ u32 msb; /* 0x0024 */
+ };
+ } sar;
+ union {
+ u64 reg; /* 0x0028..0x002c */
+ struct {
+ u32 lsb; /* 0x0028 */
+ u32 msb; /* 0x002c */
+ };
+ } dar;
+
+ u32 watermark_en; /* 0x0030 */
+ u32 control1; /* 0x0034 */
+ u32 func_num; /* 0x0038 */
+ u32 qos; /* 0x003c */
+ u32 reserved; /* 0x0040..0x007c */
+ u32 ch_stat; /* 0x0080 */
+ u32 int_stat; /* 0x0084 */
+ u32 int_setup; /* 0x0088 */
+ u32 int_clear; /* 0x008c */
+ union {
+ u64 reg; /* 0x0090..0x0094 */
+ struct {
+ u32 lsb; /* 0x0090 */
+ u32 msb; /* 0x0094 */
+ };
+ } msi_stop;
+ union {
+ u64 reg; /* 0x0098..0x009c */
+ struct {
+ u32 lsb; /* 0x0098 */
+ u32 msb; /* 0x009c */
+ };
+ } msi_watermark;
+ union {
+ u64 reg; /* 0x00a0..0x00a4 */
+ struct {
+ u32 lsb; /* 0x00a0 */
+ u32 msb; /* 0x00a4 */
+ };
+ } msi_abort;
+ u32 msi_msgdata; /* 0x00a8 */
+} __packed;
+
+struct dw_hdma_v0_ch {
+ struct dw_hdma_v0_ch_regs wr; /* 0x0000 */
+ struct dw_hdma_v0_ch_regs rd; /* 0x0100 */
+} __packed;
+
+struct dw_hdma_v0_regs {
+ struct dw_hdma_v0_ch ch[HDMA_V0_MAX_NR_CH]; /* 0x0000..0x0fa8 */
+} __packed;
+
+#endif /* _DW_HDMA_V0_REGS_H */
diff --git a/include/linux/dma/edma.h b/include/linux/dma/edma.h
index 7d8062e9c544..a379b599c7fa 100644
--- a/include/linux/dma/edma.h
+++ b/include/linux/dma/edma.h
@@ -30,7 +30,8 @@ struct dw_edma_core_ops {
enum dw_edma_map_format {
EDMA_MF_EDMA_LEGACY = 0x0,
EDMA_MF_EDMA_UNROLL = 0x1,
- EDMA_MF_HDMA_COMPAT = 0x5
+ EDMA_MF_HDMA_COMPAT = 0x5,
+ EDMA_MF_HDMA_NATIVE = 0x7
};

/**
--
2.25.1