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Message-ID: <YtlUx0lf8ZSfgkff@matsya>
Date: Thu, 21 Jul 2022 18:59:43 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Jie Hai <haijie1@...wei.com>
Cc: wangzhou1@...ilicon.com, dmaengine@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/7] dmaengine: hisilicon: Adapt DMA driver to
HiSilicon IP09
On 29-06-22, 11:55, Jie Hai wrote:
> 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 <haijie1@...wei.com>
> ---
> drivers/dma/hisi_dma.c | 382 ++++++++++++++++++++++++++++++++---------
> 1 file changed, 299 insertions(+), 83 deletions(-)
>
> diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
> index d5f87ef4a5ee..dc7c59b21114 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 0
> +#define HISI_DMA_Q_CTRL0_QUEUE_PAUSE 4
Pls use BIT/GENMASK only for register bits
> +#define HISI_DMA_Q_CTRL1 0x24
> +#define HISI_DMA_Q_CTRL1_QUEUE_RESET 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 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 24
> +
> +/* HiSilicon IP09 DMA register and field define */
> +#define HISI_DMA_HIP09_DMA_FLR_DISABLE 0xA00
> +#define HISI_DMA_HIP09_DMA_FLR_DISABLE_B 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 26
> +#define HISI_DMA_HIP09_Q_CTRL0_CQ_DRCT 27
> +#define HISI_DMA_HIP09_Q_CTRL1_VA_ENABLE 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 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)
> @@ -139,48 +226,76 @@ static inline void hisi_dma_update_bit(void __iomem *addr, u32 pos, bool val)
> 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) {
> @@ -217,7 +332,7 @@ 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) {
> @@ -300,8 +415,8 @@ 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)
> @@ -375,26 +490,86 @@ 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)
> @@ -438,17 +613,18 @@ 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, chan->qp_num,
> - chan->cq_head);
> + 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);
> hisi_dma_start_transfer(chan);
> @@ -508,16 +684,58 @@ 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");
> @@ -534,40 +752,37 @@ 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");
> @@ -579,6 +794,7 @@ 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
--
~Vinod
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