by Jie Hai

[permalink] [raw]

Subject: [PATCH v5 5/7] dmaengine: hisilicon: Adapt DMA driver to HiSilicon IP09

The HiSilicon IP08 and HiSilicon IP09 are DMA iEPs, they
have the same pci device id but different pci revision.
Unfortunately, they have different register layouts, so
the origin driver cannot run on HiSilicon IP09 correctly.

This patch enables the driver to adapt to HiSilicon IP09.
HiSilicon IP09 offers 4 channels, each channel has a send
queue, a complete queue and an interrupt to help to do tasks.
This DMA engine can do memory copy between memory blocks.

Signed-off-by: Jie Hai <[email protected]>
Acked-by: Zhou Wang <[email protected]>
---
drivers/dma/hisi_dma.c | 381 ++++++++++++++++++++++++++++++++---------
1 file changed, 299 insertions(+), 82 deletions(-)

diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
index 5d62fe62ba00..da5e49ee95fa 100644
--- a/drivers/dma/hisi_dma.c
+++ b/drivers/dma/hisi_dma.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright(c) 2019 HiSilicon Limited. */
+/* Copyright(c) 2019-2022 HiSilicon Limited. */
+
#include <linux/bitfield.h>
#include <linux/dmaengine.h>
#include <linux/init.h>
@@ -9,35 +10,85 @@
#include <linux/spinlock.h>
#include "virt-dma.h"

-#define HISI_DMA_SQ_BASE_L 0x0
-#define HISI_DMA_SQ_BASE_H 0x4
-#define HISI_DMA_SQ_DEPTH 0x8
-#define HISI_DMA_SQ_TAIL_PTR 0xc
-#define HISI_DMA_CQ_BASE_L 0x10
-#define HISI_DMA_CQ_BASE_H 0x14
-#define HISI_DMA_CQ_DEPTH 0x18
-#define HISI_DMA_CQ_HEAD_PTR 0x1c
-#define HISI_DMA_CTRL0 0x20
-#define HISI_DMA_CTRL0_QUEUE_EN_S 0
-#define HISI_DMA_CTRL0_QUEUE_PAUSE_S 4
-#define HISI_DMA_CTRL1 0x24
-#define HISI_DMA_CTRL1_QUEUE_RESET_S 0
-#define HISI_DMA_Q_FSM_STS 0x30
-#define HISI_DMA_FSM_STS_MASK GENMASK(3, 0)
-#define HISI_DMA_INT_STS 0x40
-#define HISI_DMA_INT_STS_MASK GENMASK(12, 0)
-#define HISI_DMA_INT_MSK 0x44
-#define HISI_DMA_MODE 0x217c
-#define HISI_DMA_OFFSET 0x100
-
-#define HISI_DMA_MSI_NUM 32
-#define HISI_DMA_CHAN_NUM 30
-#define HISI_DMA_Q_DEPTH_VAL 1024
-
-#define PCI_BAR_2 2
-
-#define HISI_DMA_POLL_Q_STS_DELAY_US 10
-#define HISI_DMA_POLL_Q_STS_TIME_OUT_US 1000
+/* HiSilicon DMA register common field define */
+#define HISI_DMA_Q_SQ_BASE_L 0x0
+#define HISI_DMA_Q_SQ_BASE_H 0x4
+#define HISI_DMA_Q_SQ_DEPTH 0x8
+#define HISI_DMA_Q_SQ_TAIL_PTR 0xc
+#define HISI_DMA_Q_CQ_BASE_L 0x10
+#define HISI_DMA_Q_CQ_BASE_H 0x14
+#define HISI_DMA_Q_CQ_DEPTH 0x18
+#define HISI_DMA_Q_CQ_HEAD_PTR 0x1c
+#define HISI_DMA_Q_CTRL0 0x20
+#define HISI_DMA_Q_CTRL0_QUEUE_EN BIT(0)
+#define HISI_DMA_Q_CTRL0_QUEUE_PAUSE BIT(4)
+#define HISI_DMA_Q_CTRL1 0x24
+#define HISI_DMA_Q_CTRL1_QUEUE_RESET BIT(0)
+#define HISI_DMA_Q_FSM_STS 0x30
+#define HISI_DMA_Q_FSM_STS_MASK GENMASK(3, 0)
+#define HISI_DMA_Q_ERR_INT_NUM0 0x84
+#define HISI_DMA_Q_ERR_INT_NUM1 0x88
+#define HISI_DMA_Q_ERR_INT_NUM2 0x8c
+
+/* HiSilicon IP08 DMA register and field define */
+#define HISI_DMA_HIP08_MODE 0x217C
+#define HISI_DMA_HIP08_Q_BASE 0x0
+#define HISI_DMA_HIP08_Q_CTRL0_ERR_ABORT_EN BIT(2)
+#define HISI_DMA_HIP08_Q_INT_STS 0x40
+#define HISI_DMA_HIP08_Q_INT_MSK 0x44
+#define HISI_DMA_HIP08_Q_INT_STS_MASK GENMASK(14, 0)
+#define HISI_DMA_HIP08_Q_ERR_INT_NUM3 0x90
+#define HISI_DMA_HIP08_Q_ERR_INT_NUM4 0x94
+#define HISI_DMA_HIP08_Q_ERR_INT_NUM5 0x98
+#define HISI_DMA_HIP08_Q_ERR_INT_NUM6 0x48
+#define HISI_DMA_HIP08_Q_CTRL0_SQCQ_DRCT BIT(24)
+
+/* HiSilicon IP09 DMA register and field define */
+#define HISI_DMA_HIP09_DMA_FLR_DISABLE 0xA00
+#define HISI_DMA_HIP09_DMA_FLR_DISABLE_B BIT(0)
+#define HISI_DMA_HIP09_Q_BASE 0x2000
+#define HISI_DMA_HIP09_Q_CTRL0_ERR_ABORT_EN GENMASK(31, 28)
+#define HISI_DMA_HIP09_Q_CTRL0_SQ_DRCT BIT(26)
+#define HISI_DMA_HIP09_Q_CTRL0_CQ_DRCT BIT(27)
+#define HISI_DMA_HIP09_Q_CTRL1_VA_ENABLE BIT(2)
+#define HISI_DMA_HIP09_Q_INT_STS 0x40
+#define HISI_DMA_HIP09_Q_INT_MSK 0x44
+#define HISI_DMA_HIP09_Q_INT_STS_MASK 0x1
+#define HISI_DMA_HIP09_Q_ERR_INT_STS 0x48
+#define HISI_DMA_HIP09_Q_ERR_INT_MSK 0x4C
+#define HISI_DMA_HIP09_Q_ERR_INT_STS_MASK GENMASK(18, 1)
+#define HISI_DMA_HIP09_PORT_CFG_REG(port_id) (0x800 + \
+ (port_id) * 0x20)
+#define HISI_DMA_HIP09_PORT_CFG_LINK_DOWN_MASK_B BIT(16)
+
+#define HISI_DMA_HIP09_MAX_PORT_NUM 16
+
+#define HISI_DMA_HIP08_MSI_NUM 32
+#define HISI_DMA_HIP08_CHAN_NUM 30
+#define HISI_DMA_HIP09_MSI_NUM 4
+#define HISI_DMA_HIP09_CHAN_NUM 4
+#define HISI_DMA_REVISION_HIP08B 0x21
+#define HISI_DMA_REVISION_HIP09A 0x30
+
+#define HISI_DMA_Q_OFFSET 0x100
+#define HISI_DMA_Q_DEPTH_VAL 1024
+
+#define PCI_BAR_2 2
+
+#define HISI_DMA_POLL_Q_STS_DELAY_US 10
+#define HISI_DMA_POLL_Q_STS_TIME_OUT_US 1000
+
+/*
+ * The HIP08B(HiSilicon IP08) and HIP09A(HiSilicon IP09) are DMA iEPs, they
+ * have the same pci device id but different pci revision.
+ * Unfortunately, they have different register layouts, so two layout
+ * enumerations are defined.
+ */
+enum hisi_dma_reg_layout {
+ HISI_DMA_REG_LAYOUT_INVALID = 0,
+ HISI_DMA_REG_LAYOUT_HIP08,
+ HISI_DMA_REG_LAYOUT_HIP09
+};

enum hisi_dma_mode {
EP = 0,
@@ -108,9 +159,45 @@ struct hisi_dma_dev {
struct dma_device dma_dev;
u32 chan_num;
u32 chan_depth;
+ enum hisi_dma_reg_layout reg_layout;
+ void __iomem *queue_base; /* queue region start of register */
struct hisi_dma_chan chan[];
};

+static enum hisi_dma_reg_layout hisi_dma_get_reg_layout(struct pci_dev *pdev)
+{
+ if (pdev->revision == HISI_DMA_REVISION_HIP08B)
+ return HISI_DMA_REG_LAYOUT_HIP08;
+ else if (pdev->revision >= HISI_DMA_REVISION_HIP09A)
+ return HISI_DMA_REG_LAYOUT_HIP09;
+
+ return HISI_DMA_REG_LAYOUT_INVALID;
+}
+
+static u32 hisi_dma_get_chan_num(struct pci_dev *pdev)
+{
+ if (pdev->revision == HISI_DMA_REVISION_HIP08B)
+ return HISI_DMA_HIP08_CHAN_NUM;
+
+ return HISI_DMA_HIP09_CHAN_NUM;
+}
+
+static u32 hisi_dma_get_msi_num(struct pci_dev *pdev)
+{
+ if (pdev->revision == HISI_DMA_REVISION_HIP08B)
+ return HISI_DMA_HIP08_MSI_NUM;
+
+ return HISI_DMA_HIP09_MSI_NUM;
+}
+
+static u32 hisi_dma_get_queue_base(struct pci_dev *pdev)
+{
+ if (pdev->revision == HISI_DMA_REVISION_HIP08B)
+ return HISI_DMA_HIP08_Q_BASE;
+
+ return HISI_DMA_HIP09_Q_BASE;
+}
+
static inline struct hisi_dma_chan *to_hisi_dma_chan(struct dma_chan *c)
{
return container_of(c, struct hisi_dma_chan, vc.chan);
@@ -124,7 +211,7 @@ static inline struct hisi_dma_desc *to_hisi_dma_desc(struct virt_dma_desc *vd)
static inline void hisi_dma_chan_write(void __iomem *base, u32 reg, u32 index,
u32 val)
{
- writel_relaxed(val, base + reg + index * HISI_DMA_OFFSET);
+ writel_relaxed(val, base + reg + index * HISI_DMA_Q_OFFSET);
}

static inline void hisi_dma_update_bit(void __iomem *addr, u32 pos, bool val)
@@ -132,55 +219,83 @@ static inline void hisi_dma_update_bit(void __iomem *addr, u32 pos, bool val)
u32 tmp;

tmp = readl_relaxed(addr);
- tmp = val ? tmp | BIT(pos) : tmp & ~BIT(pos);
+ tmp = val ? tmp | pos : tmp & ~pos;
writel_relaxed(tmp, addr);
}

static void hisi_dma_pause_dma(struct hisi_dma_dev *hdma_dev, u32 index,
bool pause)
{
- void __iomem *addr = hdma_dev->base + HISI_DMA_CTRL0 + index *
- HISI_DMA_OFFSET;
+ void __iomem *addr;

- hisi_dma_update_bit(addr, HISI_DMA_CTRL0_QUEUE_PAUSE_S, pause);
+ addr = hdma_dev->queue_base + HISI_DMA_Q_CTRL0 +
+ index * HISI_DMA_Q_OFFSET;
+ hisi_dma_update_bit(addr, HISI_DMA_Q_CTRL0_QUEUE_PAUSE, pause);
}

static void hisi_dma_enable_dma(struct hisi_dma_dev *hdma_dev, u32 index,
bool enable)
{
- void __iomem *addr = hdma_dev->base + HISI_DMA_CTRL0 + index *
- HISI_DMA_OFFSET;
+ void __iomem *addr;

- hisi_dma_update_bit(addr, HISI_DMA_CTRL0_QUEUE_EN_S, enable);
+ addr = hdma_dev->queue_base + HISI_DMA_Q_CTRL0 +
+ index * HISI_DMA_Q_OFFSET;
+ hisi_dma_update_bit(addr, HISI_DMA_Q_CTRL0_QUEUE_EN, enable);
}

static void hisi_dma_mask_irq(struct hisi_dma_dev *hdma_dev, u32 qp_index)
{
- hisi_dma_chan_write(hdma_dev->base, HISI_DMA_INT_MSK, qp_index,
- HISI_DMA_INT_STS_MASK);
+ void __iomem *q_base = hdma_dev->queue_base;
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08)
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_INT_MSK,
+ qp_index, HISI_DMA_HIP08_Q_INT_STS_MASK);
+ else {
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP09_Q_INT_MSK,
+ qp_index, HISI_DMA_HIP09_Q_INT_STS_MASK);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP09_Q_ERR_INT_MSK,
+ qp_index,
+ HISI_DMA_HIP09_Q_ERR_INT_STS_MASK);
+ }
}

static void hisi_dma_unmask_irq(struct hisi_dma_dev *hdma_dev, u32 qp_index)
{
- void __iomem *base = hdma_dev->base;
-
- hisi_dma_chan_write(base, HISI_DMA_INT_STS, qp_index,
- HISI_DMA_INT_STS_MASK);
- hisi_dma_chan_write(base, HISI_DMA_INT_MSK, qp_index, 0);
+ void __iomem *q_base = hdma_dev->queue_base;
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08) {
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_INT_STS,
+ qp_index, HISI_DMA_HIP08_Q_INT_STS_MASK);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_INT_MSK,
+ qp_index, 0);
+ } else {
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP09_Q_INT_STS,
+ qp_index, HISI_DMA_HIP09_Q_INT_STS_MASK);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP09_Q_ERR_INT_STS,
+ qp_index,
+ HISI_DMA_HIP09_Q_ERR_INT_STS_MASK);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP09_Q_INT_MSK,
+ qp_index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP09_Q_ERR_INT_MSK,
+ qp_index, 0);
+ }
}

static void hisi_dma_do_reset(struct hisi_dma_dev *hdma_dev, u32 index)
{
- void __iomem *addr = hdma_dev->base + HISI_DMA_CTRL1 + index *
- HISI_DMA_OFFSET;
+ void __iomem *addr;

- hisi_dma_update_bit(addr, HISI_DMA_CTRL1_QUEUE_RESET_S, 1);
+ addr = hdma_dev->queue_base +
+ HISI_DMA_Q_CTRL1 + index * HISI_DMA_Q_OFFSET;
+ hisi_dma_update_bit(addr, HISI_DMA_Q_CTRL1_QUEUE_RESET, 1);
}

static void hisi_dma_reset_qp_point(struct hisi_dma_dev *hdma_dev, u32 index)
{
- hisi_dma_chan_write(hdma_dev->base, HISI_DMA_SQ_TAIL_PTR, index, 0);
- hisi_dma_chan_write(hdma_dev->base, HISI_DMA_CQ_HEAD_PTR, index, 0);
+ void __iomem *q_base = hdma_dev->queue_base;
+
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_TAIL_PTR, index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_HEAD_PTR, index, 0);
}

static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan,
@@ -195,11 +310,11 @@ static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan,
hisi_dma_enable_dma(hdma_dev, index, false);
hisi_dma_mask_irq(hdma_dev, index);

- addr = hdma_dev->base +
- HISI_DMA_Q_FSM_STS + index * HISI_DMA_OFFSET;
+ addr = hdma_dev->queue_base +
+ HISI_DMA_Q_FSM_STS + index * HISI_DMA_Q_OFFSET;

ret = readl_relaxed_poll_timeout(addr, tmp,
- FIELD_GET(HISI_DMA_FSM_STS_MASK, tmp) != RUN,
+ FIELD_GET(HISI_DMA_Q_FSM_STS_MASK, tmp) != RUN,
HISI_DMA_POLL_Q_STS_DELAY_US, HISI_DMA_POLL_Q_STS_TIME_OUT_US);
if (ret) {
dev_err(&hdma_dev->pdev->dev, "disable channel timeout!\n");
@@ -216,7 +331,7 @@ static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan,
}

ret = readl_relaxed_poll_timeout(addr, tmp,
- FIELD_GET(HISI_DMA_FSM_STS_MASK, tmp) == IDLE,
+ FIELD_GET(HISI_DMA_Q_FSM_STS_MASK, tmp) == IDLE,
HISI_DMA_POLL_Q_STS_DELAY_US, HISI_DMA_POLL_Q_STS_TIME_OUT_US);
if (ret) {
dev_err(&hdma_dev->pdev->dev, "reset channel timeout!\n");
@@ -298,8 +413,8 @@ static void hisi_dma_start_transfer(struct hisi_dma_chan *chan)
chan->sq_tail = (chan->sq_tail + 1) % hdma_dev->chan_depth;

/* update sq_tail to trigger a new task */
- hisi_dma_chan_write(hdma_dev->base, HISI_DMA_SQ_TAIL_PTR, chan->qp_num,
- chan->sq_tail);
+ hisi_dma_chan_write(hdma_dev->queue_base, HISI_DMA_Q_SQ_TAIL_PTR,
+ chan->qp_num, chan->sq_tail);
}

static void hisi_dma_issue_pending(struct dma_chan *c)
@@ -373,26 +488,86 @@ static int hisi_dma_alloc_qps_mem(struct hisi_dma_dev *hdma_dev)
static void hisi_dma_init_hw_qp(struct hisi_dma_dev *hdma_dev, u32 index)
{
struct hisi_dma_chan *chan = &hdma_dev->chan[index];
+ void __iomem *q_base = hdma_dev->queue_base;
u32 hw_depth = hdma_dev->chan_depth - 1;
- void __iomem *base = hdma_dev->base;
+ void __iomem *addr;
+ u32 tmp;

/* set sq, cq base */
- hisi_dma_chan_write(base, HISI_DMA_SQ_BASE_L, index,
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_BASE_L, index,
lower_32_bits(chan->sq_dma));
- hisi_dma_chan_write(base, HISI_DMA_SQ_BASE_H, index,
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_BASE_H, index,
upper_32_bits(chan->sq_dma));
- hisi_dma_chan_write(base, HISI_DMA_CQ_BASE_L, index,
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_BASE_L, index,
lower_32_bits(chan->cq_dma));
- hisi_dma_chan_write(base, HISI_DMA_CQ_BASE_H, index,
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_BASE_H, index,
upper_32_bits(chan->cq_dma));

/* set sq, cq depth */
- hisi_dma_chan_write(base, HISI_DMA_SQ_DEPTH, index, hw_depth);
- hisi_dma_chan_write(base, HISI_DMA_CQ_DEPTH, index, hw_depth);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_DEPTH, index, hw_depth);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_DEPTH, index, hw_depth);

/* init sq tail and cq head */
- hisi_dma_chan_write(base, HISI_DMA_SQ_TAIL_PTR, index, 0);
- hisi_dma_chan_write(base, HISI_DMA_CQ_HEAD_PTR, index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_TAIL_PTR, index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_HEAD_PTR, index, 0);
+
+ /* init error interrupt stats */
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_ERR_INT_NUM0, index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_ERR_INT_NUM1, index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_ERR_INT_NUM2, index, 0);
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08) {
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_ERR_INT_NUM3,
+ index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_ERR_INT_NUM4,
+ index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_ERR_INT_NUM5,
+ index, 0);
+ hisi_dma_chan_write(q_base, HISI_DMA_HIP08_Q_ERR_INT_NUM6,
+ index, 0);
+ /*
+ * init SQ/CQ direction selecting register.
+ * "0" is to local side and "1" is to remote side.
+ */
+ addr = q_base + HISI_DMA_Q_CTRL0 + index * HISI_DMA_Q_OFFSET;
+ hisi_dma_update_bit(addr, HISI_DMA_HIP08_Q_CTRL0_SQCQ_DRCT, 0);
+
+ /*
+ * 0 - Continue to next descriptor if error occurs.
+ * 1 - Abort the DMA queue if error occurs.
+ */
+ hisi_dma_update_bit(addr,
+ HISI_DMA_HIP08_Q_CTRL0_ERR_ABORT_EN, 0);
+ } else {
+ addr = q_base + HISI_DMA_Q_CTRL0 + index * HISI_DMA_Q_OFFSET;
+
+ /*
+ * init SQ/CQ direction selecting register.
+ * "0" is to local side and "1" is to remote side.
+ */
+ hisi_dma_update_bit(addr, HISI_DMA_HIP09_Q_CTRL0_SQ_DRCT, 0);
+ hisi_dma_update_bit(addr, HISI_DMA_HIP09_Q_CTRL0_CQ_DRCT, 0);
+
+ /*
+ * 0 - Continue to next descriptor if error occurs.
+ * 1 - Abort the DMA queue if error occurs.
+ */
+
+ tmp = readl_relaxed(addr);
+ tmp &= ~HISI_DMA_HIP09_Q_CTRL0_ERR_ABORT_EN;
+ writel_relaxed(tmp, addr);
+
+ /*
+ * 0 - dma should process FLR whith CPU.
+ * 1 - dma not process FLR, only cpu process FLR.
+ */
+ addr = q_base + HISI_DMA_HIP09_DMA_FLR_DISABLE +
+ index * HISI_DMA_Q_OFFSET;
+ hisi_dma_update_bit(addr, HISI_DMA_HIP09_DMA_FLR_DISABLE_B, 0);
+
+ addr = q_base + HISI_DMA_Q_CTRL1 + index * HISI_DMA_Q_OFFSET;
+ hisi_dma_update_bit(addr, HISI_DMA_HIP09_Q_CTRL1_VA_ENABLE, 1);
+ }
}

static void hisi_dma_enable_qp(struct hisi_dma_dev *hdma_dev, u32 qp_index)
@@ -436,14 +611,16 @@ static irqreturn_t hisi_dma_irq(int irq, void *data)
struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
struct hisi_dma_desc *desc;
struct hisi_dma_cqe *cqe;
+ void __iomem *q_base;

spin_lock(&chan->vc.lock);

desc = chan->desc;
cqe = chan->cq + chan->cq_head;
+ q_base = hdma_dev->queue_base;
if (desc) {
chan->cq_head = (chan->cq_head + 1) % hdma_dev->chan_depth;
- hisi_dma_chan_write(hdma_dev->base, HISI_DMA_CQ_HEAD_PTR,
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_HEAD_PTR,
chan->qp_num, chan->cq_head);
if (FIELD_GET(STATUS_MASK, cqe->w0) == STATUS_SUCC) {
vchan_cookie_complete(&desc->vd);
@@ -504,16 +681,58 @@ static void hisi_dma_disable_hw_channels(void *data)
static void hisi_dma_set_mode(struct hisi_dma_dev *hdma_dev,
enum hisi_dma_mode mode)
{
- writel_relaxed(mode == RC ? 1 : 0, hdma_dev->base + HISI_DMA_MODE);
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08)
+ writel_relaxed(mode == RC ? 1 : 0,
+ hdma_dev->base + HISI_DMA_HIP08_MODE);
+}
+
+static void hisi_dma_init_hw(struct hisi_dma_dev *hdma_dev)
+{
+ void __iomem *addr;
+ int i;
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP09) {
+ for (i = 0; i < HISI_DMA_HIP09_MAX_PORT_NUM; i++) {
+ addr = hdma_dev->base + HISI_DMA_HIP09_PORT_CFG_REG(i);
+ hisi_dma_update_bit(addr,
+ HISI_DMA_HIP09_PORT_CFG_LINK_DOWN_MASK_B, 1);
+ }
+ }
+}
+
+static void hisi_dma_init_dma_dev(struct hisi_dma_dev *hdma_dev)
+{
+ struct dma_device *dma_dev;
+
+ dma_dev = &hdma_dev->dma_dev;
+ dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
+ dma_dev->device_free_chan_resources = hisi_dma_free_chan_resources;
+ dma_dev->device_prep_dma_memcpy = hisi_dma_prep_dma_memcpy;
+ dma_dev->device_tx_status = hisi_dma_tx_status;
+ dma_dev->device_issue_pending = hisi_dma_issue_pending;
+ dma_dev->device_terminate_all = hisi_dma_terminate_all;
+ dma_dev->device_synchronize = hisi_dma_synchronize;
+ dma_dev->directions = BIT(DMA_MEM_TO_MEM);
+ dma_dev->dev = &hdma_dev->pdev->dev;
+ INIT_LIST_HEAD(&dma_dev->channels);
}

static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
+ enum hisi_dma_reg_layout reg_layout;
struct device *dev = &pdev->dev;
struct hisi_dma_dev *hdma_dev;
struct dma_device *dma_dev;
+ u32 chan_num;
+ u32 msi_num;
int ret;

+ reg_layout = hisi_dma_get_reg_layout(pdev);
+ if (reg_layout == HISI_DMA_REG_LAYOUT_INVALID) {
+ dev_err(dev, "unsupported device!\n");
+ return -EINVAL;
+ }
+
ret = pcim_enable_device(pdev);
if (ret) {
dev_err(dev, "failed to enable device mem!\n");
@@ -530,40 +749,37 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (ret)
return ret;

- hdma_dev = devm_kzalloc(dev, struct_size(hdma_dev, chan, HISI_DMA_CHAN_NUM), GFP_KERNEL);
+ chan_num = hisi_dma_get_chan_num(pdev);
+ hdma_dev = devm_kzalloc(dev, struct_size(hdma_dev, chan, chan_num),
+ GFP_KERNEL);
if (!hdma_dev)
return -EINVAL;

hdma_dev->base = pcim_iomap_table(pdev)[PCI_BAR_2];
hdma_dev->pdev = pdev;
- hdma_dev->chan_num = HISI_DMA_CHAN_NUM;
hdma_dev->chan_depth = HISI_DMA_Q_DEPTH_VAL;
+ hdma_dev->chan_num = chan_num;
+ hdma_dev->reg_layout = reg_layout;
+ hdma_dev->queue_base = hdma_dev->base + hisi_dma_get_queue_base(pdev);

pci_set_drvdata(pdev, hdma_dev);
pci_set_master(pdev);

+ msi_num = hisi_dma_get_msi_num(pdev);
+
/* This will be freed by 'pcim_release()'. See 'pcim_enable_device()' */
- ret = pci_alloc_irq_vectors(pdev, HISI_DMA_MSI_NUM, HISI_DMA_MSI_NUM,
- PCI_IRQ_MSI);
+ ret = pci_alloc_irq_vectors(pdev, msi_num, msi_num, PCI_IRQ_MSI);
if (ret < 0) {
dev_err(dev, "Failed to allocate MSI vectors!\n");
return ret;
}

- dma_dev = &hdma_dev->dma_dev;
- dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
- dma_dev->device_free_chan_resources = hisi_dma_free_chan_resources;
- dma_dev->device_prep_dma_memcpy = hisi_dma_prep_dma_memcpy;
- dma_dev->device_tx_status = hisi_dma_tx_status;
- dma_dev->device_issue_pending = hisi_dma_issue_pending;
- dma_dev->device_terminate_all = hisi_dma_terminate_all;
- dma_dev->device_synchronize = hisi_dma_synchronize;
- dma_dev->directions = BIT(DMA_MEM_TO_MEM);
- dma_dev->dev = dev;
- INIT_LIST_HEAD(&dma_dev->channels);
+ hisi_dma_init_dma_dev(hdma_dev);

hisi_dma_set_mode(hdma_dev, RC);

+ hisi_dma_init_hw(hdma_dev);
+
ret = hisi_dma_enable_hw_channels(hdma_dev);
if (ret < 0) {
dev_err(dev, "failed to enable hw channel!\n");
@@ -575,6 +791,7 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (ret)
return ret;

+ dma_dev = &hdma_dev->dma_dev;
ret = dmaenginem_async_device_register(dma_dev);
if (ret < 0)
dev_err(dev, "failed to register device!\n");
--
2.33.0

2022-08-05 08:59:37

by Jie Hai

[permalink] [raw]

Subject: [PATCH v5 6/7] dmaengine: hisilicon: Dump regs to debugfs

This patch adds dump of registers with debugfs for HIP08
and HIP09 DMA driver.

Signed-off-by: Jie Hai <[email protected]>
Acked-by: Zhou Wang <[email protected]>
---
drivers/dma/hisi_dma.c | 238 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 236 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
index da5e49ee95fa..c1350a36fddd 100644
--- a/drivers/dma/hisi_dma.c
+++ b/drivers/dma/hisi_dma.c
@@ -78,6 +78,8 @@
#define HISI_DMA_POLL_Q_STS_DELAY_US 10
#define HISI_DMA_POLL_Q_STS_TIME_OUT_US 1000

+#define HISI_DMA_MAX_DIR_NAME_LEN 128
+
/*
* The HIP08B(HiSilicon IP08) and HIP09A(HiSilicon IP09) are DMA iEPs, they
* have the same pci device id but different pci revision.
@@ -164,6 +166,123 @@ struct hisi_dma_dev {
struct hisi_dma_chan chan[];
};

+#ifdef CONFIG_DEBUG_FS
+
+static const struct debugfs_reg32 hisi_dma_comm_chan_regs[] = {
+ {"DMA_QUEUE_SQ_DEPTH ", 0x0008ull},
+ {"DMA_QUEUE_SQ_TAIL_PTR ", 0x000Cull},
+ {"DMA_QUEUE_CQ_DEPTH ", 0x0018ull},
+ {"DMA_QUEUE_CQ_HEAD_PTR ", 0x001Cull},
+ {"DMA_QUEUE_CTRL0 ", 0x0020ull},
+ {"DMA_QUEUE_CTRL1 ", 0x0024ull},
+ {"DMA_QUEUE_FSM_STS ", 0x0030ull},
+ {"DMA_QUEUE_SQ_STS ", 0x0034ull},
+ {"DMA_QUEUE_CQ_TAIL_PTR ", 0x003Cull},
+ {"DMA_QUEUE_INT_STS ", 0x0040ull},
+ {"DMA_QUEUE_INT_MSK ", 0x0044ull},
+ {"DMA_QUEUE_INT_RO ", 0x006Cull},
+};
+
+static const struct debugfs_reg32 hisi_dma_hip08_chan_regs[] = {
+ {"DMA_QUEUE_BYTE_CNT ", 0x0038ull},
+ {"DMA_ERR_INT_NUM6 ", 0x0048ull},
+ {"DMA_QUEUE_DESP0 ", 0x0050ull},
+ {"DMA_QUEUE_DESP1 ", 0x0054ull},
+ {"DMA_QUEUE_DESP2 ", 0x0058ull},
+ {"DMA_QUEUE_DESP3 ", 0x005Cull},
+ {"DMA_QUEUE_DESP4 ", 0x0074ull},
+ {"DMA_QUEUE_DESP5 ", 0x0078ull},
+ {"DMA_QUEUE_DESP6 ", 0x007Cull},
+ {"DMA_QUEUE_DESP7 ", 0x0080ull},
+ {"DMA_ERR_INT_NUM0 ", 0x0084ull},
+ {"DMA_ERR_INT_NUM1 ", 0x0088ull},
+ {"DMA_ERR_INT_NUM2 ", 0x008Cull},
+ {"DMA_ERR_INT_NUM3 ", 0x0090ull},
+ {"DMA_ERR_INT_NUM4 ", 0x0094ull},
+ {"DMA_ERR_INT_NUM5 ", 0x0098ull},
+ {"DMA_QUEUE_SQ_STS2 ", 0x00A4ull},
+};
+
+static const struct debugfs_reg32 hisi_dma_hip09_chan_regs[] = {
+ {"DMA_QUEUE_ERR_INT_STS ", 0x0048ull},
+ {"DMA_QUEUE_ERR_INT_MSK ", 0x004Cull},
+ {"DFX_SQ_READ_ERR_PTR ", 0x0068ull},
+ {"DFX_DMA_ERR_INT_NUM0 ", 0x0084ull},
+ {"DFX_DMA_ERR_INT_NUM1 ", 0x0088ull},
+ {"DFX_DMA_ERR_INT_NUM2 ", 0x008Cull},
+ {"DFX_DMA_QUEUE_SQ_STS2 ", 0x00A4ull},
+};
+
+static const struct debugfs_reg32 hisi_dma_hip08_comm_regs[] = {
+ {"DMA_ECC_ERR_ADDR ", 0x2004ull},
+ {"DMA_ECC_ECC_CNT ", 0x2014ull},
+ {"COMMON_AND_CH_ERR_STS ", 0x2030ull},
+ {"LOCAL_CPL_ID_STS_0 ", 0x20E0ull},
+ {"LOCAL_CPL_ID_STS_1 ", 0x20E4ull},
+ {"LOCAL_CPL_ID_STS_2 ", 0x20E8ull},
+ {"LOCAL_CPL_ID_STS_3 ", 0x20ECull},
+ {"LOCAL_TLP_NUM ", 0x2158ull},
+ {"SQCQ_TLP_NUM ", 0x2164ull},
+ {"CPL_NUM ", 0x2168ull},
+ {"INF_BACK_PRESS_STS ", 0x2170ull},
+ {"DMA_CH_RAS_LEVEL ", 0x2184ull},
+ {"DMA_CM_RAS_LEVEL ", 0x2188ull},
+ {"DMA_CH_ERR_STS ", 0x2190ull},
+ {"DMA_CH_DONE_STS ", 0x2194ull},
+ {"DMA_SQ_TAG_STS_0 ", 0x21A0ull},
+ {"DMA_SQ_TAG_STS_1 ", 0x21A4ull},
+ {"DMA_SQ_TAG_STS_2 ", 0x21A8ull},
+ {"DMA_SQ_TAG_STS_3 ", 0x21ACull},
+ {"LOCAL_P_ID_STS_0 ", 0x21B0ull},
+ {"LOCAL_P_ID_STS_1 ", 0x21B4ull},
+ {"LOCAL_P_ID_STS_2 ", 0x21B8ull},
+ {"LOCAL_P_ID_STS_3 ", 0x21BCull},
+ {"DMA_PREBUFF_INFO_0 ", 0x2200ull},
+ {"DMA_CM_TABLE_INFO_0 ", 0x2220ull},
+ {"DMA_CM_CE_RO ", 0x2244ull},
+ {"DMA_CM_NFE_RO ", 0x2248ull},
+ {"DMA_CM_FE_RO ", 0x224Cull},
+};
+
+static const struct debugfs_reg32 hisi_dma_hip09_comm_regs[] = {
+ {"COMMON_AND_CH_ERR_STS ", 0x0030ull},
+ {"DMA_PORT_IDLE_STS ", 0x0150ull},
+ {"DMA_CH_RAS_LEVEL ", 0x0184ull},
+ {"DMA_CM_RAS_LEVEL ", 0x0188ull},
+ {"DMA_CM_CE_RO ", 0x0244ull},
+ {"DMA_CM_NFE_RO ", 0x0248ull},
+ {"DMA_CM_FE_RO ", 0x024Cull},
+ {"DFX_INF_BACK_PRESS_STS0 ", 0x1A40ull},
+ {"DFX_INF_BACK_PRESS_STS1 ", 0x1A44ull},
+ {"DFX_INF_BACK_PRESS_STS2 ", 0x1A48ull},
+ {"DFX_DMA_WRR_DISABLE ", 0x1A4Cull},
+ {"DFX_PA_REQ_TLP_NUM ", 0x1C00ull},
+ {"DFX_PA_BACK_TLP_NUM ", 0x1C04ull},
+ {"DFX_PA_RETRY_TLP_NUM ", 0x1C08ull},
+ {"DFX_LOCAL_NP_TLP_NUM ", 0x1C0Cull},
+ {"DFX_LOCAL_CPL_HEAD_TLP_NUM ", 0x1C10ull},
+ {"DFX_LOCAL_CPL_DATA_TLP_NUM ", 0x1C14ull},
+ {"DFX_LOCAL_CPL_EXT_DATA_TLP_NUM ", 0x1C18ull},
+ {"DFX_LOCAL_P_HEAD_TLP_NUM ", 0x1C1Cull},
+ {"DFX_LOCAL_P_ACK_TLP_NUM ", 0x1C20ull},
+ {"DFX_BUF_ALOC_PORT_REQ_NUM ", 0x1C24ull},
+ {"DFX_BUF_ALOC_PORT_RESULT_NUM ", 0x1C28ull},
+ {"DFX_BUF_FAIL_SIZE_NUM ", 0x1C2Cull},
+ {"DFX_BUF_ALOC_SIZE_NUM ", 0x1C30ull},
+ {"DFX_BUF_NP_RELEASE_SIZE_NUM ", 0x1C34ull},
+ {"DFX_BUF_P_RELEASE_SIZE_NUM ", 0x1C38ull},
+ {"DFX_BUF_PORT_RELEASE_SIZE_NUM ", 0x1C3Cull},
+ {"DFX_DMA_PREBUF_MEM0_ECC_ERR_ADDR ", 0x1CA8ull},
+ {"DFX_DMA_PREBUF_MEM0_ECC_CNT ", 0x1CACull},
+ {"DFX_DMA_LOC_NP_OSTB_ECC_ERR_ADDR ", 0x1CB0ull},
+ {"DFX_DMA_LOC_NP_OSTB_ECC_CNT ", 0x1CB4ull},
+ {"DFX_DMA_PREBUF_MEM1_ECC_ERR_ADDR ", 0x1CC0ull},
+ {"DFX_DMA_PREBUF_MEM1_ECC_CNT ", 0x1CC4ull},
+ {"DMA_CH_DONE_STS ", 0x02E0ull},
+ {"DMA_CH_ERR_STS ", 0x0320ull},
+};
+#endif /* CONFIG_DEBUG_FS*/
+
static enum hisi_dma_reg_layout hisi_dma_get_reg_layout(struct pci_dev *pdev)
{
if (pdev->revision == HISI_DMA_REVISION_HIP08B)
@@ -717,6 +836,117 @@ static void hisi_dma_init_dma_dev(struct hisi_dma_dev *hdma_dev)
INIT_LIST_HEAD(&dma_dev->channels);
}

+/* --- debugfs implementation --- */
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+static struct debugfs_reg32 *hisi_dma_get_ch_regs(struct hisi_dma_dev *hdma_dev,
+ u32 *regs_sz)
+{
+ struct device *dev = &hdma_dev->pdev->dev;
+ struct debugfs_reg32 *regs;
+ u32 regs_sz_comm;
+
+ regs_sz_comm = ARRAY_SIZE(hisi_dma_comm_chan_regs);
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08)
+ *regs_sz = regs_sz_comm + ARRAY_SIZE(hisi_dma_hip08_chan_regs);
+ else
+ *regs_sz = regs_sz_comm + ARRAY_SIZE(hisi_dma_hip09_chan_regs);
+
+ regs = devm_kcalloc(dev, *regs_sz, sizeof(struct debugfs_reg32),
+ GFP_KERNEL);
+ if (!regs)
+ return NULL;
+ memcpy(regs, hisi_dma_comm_chan_regs, sizeof(hisi_dma_comm_chan_regs));
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08)
+ memcpy(regs + regs_sz_comm, hisi_dma_hip08_chan_regs,
+ sizeof(hisi_dma_hip08_chan_regs));
+ else
+ memcpy(regs + regs_sz_comm, hisi_dma_hip09_chan_regs,
+ sizeof(hisi_dma_hip09_chan_regs));
+
+ return regs;
+}
+
+static int hisi_dma_create_chan_dir(struct hisi_dma_dev *hdma_dev)
+{
+ char dir_name[HISI_DMA_MAX_DIR_NAME_LEN];
+ struct debugfs_regset32 *regsets;
+ struct debugfs_reg32 *regs;
+ struct dentry *chan_dir;
+ struct device *dev;
+ u32 regs_sz;
+ int ret;
+ int i;
+
+ dev = &hdma_dev->pdev->dev;
+
+ regsets = devm_kcalloc(dev, hdma_dev->chan_num,
+ sizeof(*regsets), GFP_KERNEL);
+ if (!regsets)
+ return -ENOMEM;
+
+ regs = hisi_dma_get_ch_regs(hdma_dev, &regs_sz);
+ if (!regs)
+ return -ENOMEM;
+
+ for (i = 0; i < hdma_dev->chan_num; i++) {
+ regsets[i].regs = regs;
+ regsets[i].nregs = regs_sz;
+ regsets[i].base = hdma_dev->queue_base + i * HISI_DMA_Q_OFFSET;
+ regsets[i].dev = dev;
+
+ memset(dir_name, 0, HISI_DMA_MAX_DIR_NAME_LEN);
+ ret = sprintf(dir_name, "channel%d", i);
+ if (ret < 0)
+ return ret;
+
+ chan_dir = debugfs_create_dir(dir_name,
+ hdma_dev->dma_dev.dbg_dev_root);
+ debugfs_create_regset32("regs", 0444, chan_dir, &regsets[i]);
+ }
+
+ return 0;
+}
+
+static void hisi_dma_create_debugfs(struct hisi_dma_dev *hdma_dev)
+{
+ struct debugfs_regset32 *regset;
+ struct device *dev;
+ int ret;
+
+ dev = &hdma_dev->pdev->dev;
+
+ if (hdma_dev->dma_dev.dbg_dev_root == NULL)
+ return;
+
+ regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
+ if (!regset)
+ return;
+
+ if (hdma_dev->reg_layout == HISI_DMA_REG_LAYOUT_HIP08) {
+ regset->regs = hisi_dma_hip08_comm_regs;
+ regset->nregs = ARRAY_SIZE(hisi_dma_hip08_comm_regs);
+ } else {
+ regset->regs = hisi_dma_hip09_comm_regs;
+ regset->nregs = ARRAY_SIZE(hisi_dma_hip09_comm_regs);
+ }
+ regset->base = hdma_dev->base;
+ regset->dev = dev;
+
+ debugfs_create_regset32("regs", 0444,
+ hdma_dev->dma_dev.dbg_dev_root, regset);
+
+ ret = hisi_dma_create_chan_dir(hdma_dev);
+ if (ret < 0)
+ dev_info(&hdma_dev->pdev->dev, "fail to create debugfs for channels!\n");
+}
+#else
+static void hisi_dma_create_debugfs(struct hisi_dma_dev *hdma_dev) { }
+#endif /* CONFIG_DEBUG_FS*/
+/* --- debugfs implementation --- */
+
static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
enum hisi_dma_reg_layout reg_layout;
@@ -793,10 +1023,14 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)

dma_dev = &hdma_dev->dma_dev;
ret = dmaenginem_async_device_register(dma_dev);
- if (ret < 0)
+ if (ret < 0) {
dev_err(dev, "failed to register device!\n");
+ return ret;
+ }
+
+ hisi_dma_create_debugfs(hdma_dev);

- return ret;
+ return 0;
}

static const struct pci_device_id hisi_dma_pci_tbl[] = {
--
2.33.0