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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/dma/hisi_dma.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/dma/hisi_dma.c')
-rw-r--r--drivers/dma/hisi_dma.c1053
1 files changed, 1053 insertions, 0 deletions
diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
new file mode 100644
index 000000000..c1350a36f
--- /dev/null
+++ b/drivers/dma/hisi_dma.c
@@ -0,0 +1,1053 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2019-2022 HiSilicon Limited. */
+
+#include <linux/bitfield.h>
+#include <linux/dmaengine.h>
+#include <linux/init.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include "virt-dma.h"
+
+/* 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
+
+#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.
+ * 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,
+ RC,
+};
+
+enum hisi_dma_chan_status {
+ DISABLE = -1,
+ IDLE = 0,
+ RUN,
+ CPL,
+ PAUSE,
+ HALT,
+ ABORT,
+ WAIT,
+ BUFFCLR,
+};
+
+struct hisi_dma_sqe {
+ __le32 dw0;
+#define OPCODE_MASK GENMASK(3, 0)
+#define OPCODE_SMALL_PACKAGE 0x1
+#define OPCODE_M2M 0x4
+#define LOCAL_IRQ_EN BIT(8)
+#define ATTR_SRC_MASK GENMASK(14, 12)
+ __le32 dw1;
+ __le32 dw2;
+#define ATTR_DST_MASK GENMASK(26, 24)
+ __le32 length;
+ __le64 src_addr;
+ __le64 dst_addr;
+};
+
+struct hisi_dma_cqe {
+ __le32 rsv0;
+ __le32 rsv1;
+ __le16 sq_head;
+ __le16 rsv2;
+ __le16 rsv3;
+ __le16 w0;
+#define STATUS_MASK GENMASK(15, 1)
+#define STATUS_SUCC 0x0
+#define VALID_BIT BIT(0)
+};
+
+struct hisi_dma_desc {
+ struct virt_dma_desc vd;
+ struct hisi_dma_sqe sqe;
+};
+
+struct hisi_dma_chan {
+ struct virt_dma_chan vc;
+ struct hisi_dma_dev *hdma_dev;
+ struct hisi_dma_sqe *sq;
+ struct hisi_dma_cqe *cq;
+ dma_addr_t sq_dma;
+ dma_addr_t cq_dma;
+ u32 sq_tail;
+ u32 cq_head;
+ u32 qp_num;
+ enum hisi_dma_chan_status status;
+ struct hisi_dma_desc *desc;
+};
+
+struct hisi_dma_dev {
+ struct pci_dev *pdev;
+ void __iomem *base;
+ 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[];
+};
+
+#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)
+ 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);
+}
+
+static inline struct hisi_dma_desc *to_hisi_dma_desc(struct virt_dma_desc *vd)
+{
+ return container_of(vd, struct hisi_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_Q_OFFSET);
+}
+
+static inline void hisi_dma_update_bit(void __iomem *addr, u32 pos, bool val)
+{
+ u32 tmp;
+
+ tmp = readl_relaxed(addr);
+ 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;
+
+ 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;
+
+ 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)
+{
+ 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 *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;
+
+ 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)
+{
+ 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,
+ bool disable)
+{
+ struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
+ u32 index = chan->qp_num, tmp;
+ void __iomem *addr;
+ int ret;
+
+ hisi_dma_pause_dma(hdma_dev, index, true);
+ hisi_dma_enable_dma(hdma_dev, index, false);
+ hisi_dma_mask_irq(hdma_dev, index);
+
+ 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_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");
+ WARN_ON(1);
+ }
+
+ hisi_dma_do_reset(hdma_dev, index);
+ hisi_dma_reset_qp_point(hdma_dev, index);
+ hisi_dma_pause_dma(hdma_dev, index, false);
+
+ if (!disable) {
+ hisi_dma_enable_dma(hdma_dev, index, true);
+ hisi_dma_unmask_irq(hdma_dev, index);
+ }
+
+ ret = readl_relaxed_poll_timeout(addr, tmp,
+ 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");
+ WARN_ON(1);
+ }
+}
+
+static void hisi_dma_free_chan_resources(struct dma_chan *c)
+{
+ struct hisi_dma_chan *chan = to_hisi_dma_chan(c);
+ struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
+
+ hisi_dma_reset_or_disable_hw_chan(chan, false);
+ vchan_free_chan_resources(&chan->vc);
+
+ memset(chan->sq, 0, sizeof(struct hisi_dma_sqe) * hdma_dev->chan_depth);
+ memset(chan->cq, 0, sizeof(struct hisi_dma_cqe) * hdma_dev->chan_depth);
+ chan->sq_tail = 0;
+ chan->cq_head = 0;
+ chan->status = DISABLE;
+}
+
+static void hisi_dma_desc_free(struct virt_dma_desc *vd)
+{
+ kfree(to_hisi_dma_desc(vd));
+}
+
+static struct dma_async_tx_descriptor *
+hisi_dma_prep_dma_memcpy(struct dma_chan *c, dma_addr_t dst, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct hisi_dma_chan *chan = to_hisi_dma_chan(c);
+ struct hisi_dma_desc *desc;
+
+ desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
+ if (!desc)
+ return NULL;
+
+ desc->sqe.length = cpu_to_le32(len);
+ desc->sqe.src_addr = cpu_to_le64(src);
+ desc->sqe.dst_addr = cpu_to_le64(dst);
+
+ return vchan_tx_prep(&chan->vc, &desc->vd, flags);
+}
+
+static enum dma_status
+hisi_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ return dma_cookie_status(c, cookie, txstate);
+}
+
+static void hisi_dma_start_transfer(struct hisi_dma_chan *chan)
+{
+ struct hisi_dma_sqe *sqe = chan->sq + chan->sq_tail;
+ struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
+ struct hisi_dma_desc *desc;
+ struct virt_dma_desc *vd;
+
+ vd = vchan_next_desc(&chan->vc);
+ if (!vd) {
+ chan->desc = NULL;
+ return;
+ }
+ list_del(&vd->node);
+ desc = to_hisi_dma_desc(vd);
+ chan->desc = desc;
+
+ memcpy(sqe, &desc->sqe, sizeof(struct hisi_dma_sqe));
+
+ /* update other field in sqe */
+ sqe->dw0 = cpu_to_le32(FIELD_PREP(OPCODE_MASK, OPCODE_M2M));
+ sqe->dw0 |= cpu_to_le32(LOCAL_IRQ_EN);
+
+ /* make sure data has been updated in sqe */
+ wmb();
+
+ /* update sq tail, point to new sqe position */
+ 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->queue_base, HISI_DMA_Q_SQ_TAIL_PTR,
+ chan->qp_num, chan->sq_tail);
+}
+
+static void hisi_dma_issue_pending(struct dma_chan *c)
+{
+ struct hisi_dma_chan *chan = to_hisi_dma_chan(c);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chan->vc.lock, flags);
+
+ if (vchan_issue_pending(&chan->vc) && !chan->desc)
+ hisi_dma_start_transfer(chan);
+
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+}
+
+static int hisi_dma_terminate_all(struct dma_chan *c)
+{
+ struct hisi_dma_chan *chan = to_hisi_dma_chan(c);
+ unsigned long flags;
+ LIST_HEAD(head);
+
+ spin_lock_irqsave(&chan->vc.lock, flags);
+
+ hisi_dma_pause_dma(chan->hdma_dev, chan->qp_num, true);
+ if (chan->desc) {
+ vchan_terminate_vdesc(&chan->desc->vd);
+ chan->desc = NULL;
+ }
+
+ vchan_get_all_descriptors(&chan->vc, &head);
+
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+
+ vchan_dma_desc_free_list(&chan->vc, &head);
+ hisi_dma_pause_dma(chan->hdma_dev, chan->qp_num, false);
+
+ return 0;
+}
+
+static void hisi_dma_synchronize(struct dma_chan *c)
+{
+ struct hisi_dma_chan *chan = to_hisi_dma_chan(c);
+
+ vchan_synchronize(&chan->vc);
+}
+
+static int hisi_dma_alloc_qps_mem(struct hisi_dma_dev *hdma_dev)
+{
+ size_t sq_size = sizeof(struct hisi_dma_sqe) * hdma_dev->chan_depth;
+ size_t cq_size = sizeof(struct hisi_dma_cqe) * hdma_dev->chan_depth;
+ struct device *dev = &hdma_dev->pdev->dev;
+ struct hisi_dma_chan *chan;
+ int i;
+
+ for (i = 0; i < hdma_dev->chan_num; i++) {
+ chan = &hdma_dev->chan[i];
+ chan->sq = dmam_alloc_coherent(dev, sq_size, &chan->sq_dma,
+ GFP_KERNEL);
+ if (!chan->sq)
+ return -ENOMEM;
+
+ chan->cq = dmam_alloc_coherent(dev, cq_size, &chan->cq_dma,
+ GFP_KERNEL);
+ if (!chan->cq)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+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 *addr;
+ u32 tmp;
+
+ /* set sq, cq base */
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_BASE_L, index,
+ lower_32_bits(chan->sq_dma));
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_SQ_BASE_H, index,
+ upper_32_bits(chan->sq_dma));
+ hisi_dma_chan_write(q_base, HISI_DMA_Q_CQ_BASE_L, index,
+ lower_32_bits(chan->cq_dma));
+ 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(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(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)
+{
+ hisi_dma_init_hw_qp(hdma_dev, qp_index);
+ hisi_dma_unmask_irq(hdma_dev, qp_index);
+ hisi_dma_enable_dma(hdma_dev, qp_index, true);
+}
+
+static void hisi_dma_disable_qp(struct hisi_dma_dev *hdma_dev, u32 qp_index)
+{
+ hisi_dma_reset_or_disable_hw_chan(&hdma_dev->chan[qp_index], true);
+}
+
+static void hisi_dma_enable_qps(struct hisi_dma_dev *hdma_dev)
+{
+ int i;
+
+ for (i = 0; i < hdma_dev->chan_num; i++) {
+ hdma_dev->chan[i].qp_num = i;
+ hdma_dev->chan[i].hdma_dev = hdma_dev;
+ hdma_dev->chan[i].vc.desc_free = hisi_dma_desc_free;
+ vchan_init(&hdma_dev->chan[i].vc, &hdma_dev->dma_dev);
+ hisi_dma_enable_qp(hdma_dev, i);
+ }
+}
+
+static void hisi_dma_disable_qps(struct hisi_dma_dev *hdma_dev)
+{
+ int i;
+
+ for (i = 0; i < hdma_dev->chan_num; i++) {
+ hisi_dma_disable_qp(hdma_dev, i);
+ tasklet_kill(&hdma_dev->chan[i].vc.task);
+ }
+}
+
+static irqreturn_t hisi_dma_irq(int irq, void *data)
+{
+ struct hisi_dma_chan *chan = 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(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);
+ } else {
+ dev_err(&hdma_dev->pdev->dev, "task error!\n");
+ }
+ }
+
+ spin_unlock(&chan->vc.lock);
+
+ return IRQ_HANDLED;
+}
+
+static int hisi_dma_request_qps_irq(struct hisi_dma_dev *hdma_dev)
+{
+ struct pci_dev *pdev = hdma_dev->pdev;
+ int i, ret;
+
+ for (i = 0; i < hdma_dev->chan_num; i++) {
+ ret = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i),
+ hisi_dma_irq, IRQF_SHARED, "hisi_dma",
+ &hdma_dev->chan[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* This function enables all hw channels in a device */
+static int hisi_dma_enable_hw_channels(struct hisi_dma_dev *hdma_dev)
+{
+ int ret;
+
+ ret = hisi_dma_alloc_qps_mem(hdma_dev);
+ if (ret) {
+ dev_err(&hdma_dev->pdev->dev, "fail to allocate qp memory!\n");
+ return ret;
+ }
+
+ ret = hisi_dma_request_qps_irq(hdma_dev);
+ if (ret) {
+ dev_err(&hdma_dev->pdev->dev, "fail to request qp irq!\n");
+ return ret;
+ }
+
+ hisi_dma_enable_qps(hdma_dev);
+
+ return 0;
+}
+
+static void hisi_dma_disable_hw_channels(void *data)
+{
+ hisi_dma_disable_qps(data);
+}
+
+static void hisi_dma_set_mode(struct hisi_dma_dev *hdma_dev,
+ enum hisi_dma_mode 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);
+}
+
+/* --- 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;
+ 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");
+ return ret;
+ }
+
+ ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_2, pci_name(pdev));
+ if (ret) {
+ dev_err(dev, "failed to remap I/O region!\n");
+ return ret;
+ }
+
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (ret)
+ return ret;
+
+ 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_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, msi_num, msi_num, PCI_IRQ_MSI);
+ if (ret < 0) {
+ dev_err(dev, "Failed to allocate MSI vectors!\n");
+ return ret;
+ }
+
+ 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");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, hisi_dma_disable_hw_channels,
+ hdma_dev);
+ 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");
+ return ret;
+ }
+
+ hisi_dma_create_debugfs(hdma_dev);
+
+ return 0;
+}
+
+static const struct pci_device_id hisi_dma_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, 0xa122) },
+ { 0, }
+};
+
+static struct pci_driver hisi_dma_pci_driver = {
+ .name = "hisi_dma",
+ .id_table = hisi_dma_pci_tbl,
+ .probe = hisi_dma_probe,
+};
+
+module_pci_driver(hisi_dma_pci_driver);
+
+MODULE_AUTHOR("Zhou Wang <wangzhou1@hisilicon.com>");
+MODULE_AUTHOR("Zhenfa Qiu <qiuzhenfa@hisilicon.com>");
+MODULE_DESCRIPTION("HiSilicon Kunpeng DMA controller driver");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, hisi_dma_pci_tbl);