[PATCH 2/2] dmaengine: dma: Add Hiedma Controller v310 Device Driver

Dongjiu Geng
2020-11-13T16:12:01Z

Hisilicon EDMA Controller(EDMAC) directly transfers data
between a memory and a peripheral, between peripherals, or
between memories. This avoids the CPU intervention and reduces
the interrupt handling overhead of the CPU, this driver enables
this controller.

Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
---
drivers/dma/Kconfig | 14 +
drivers/dma/Makefile | 1 +
drivers/dma/hiedmacv310.c | 1452 +++++++++++++++++++++++++++++++++++++
drivers/dma/hiedmacv310.h | 136 ++++
4 files changed, 1603 insertions(+)
create mode 100644 drivers/dma/hiedmacv310.c
create mode 100644 drivers/dma/hiedmacv310.h

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 90284ffda58a..3e5107120ff1 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -327,6 +327,20 @@ config K3_DMA
Support the DMA engine for Hisilicon K3 platform
devices.

+config HIEDMACV310
+ tristate "Hisilicon EDMAC Controller support"
+ depends on ARCH_HISI
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ help
+ The Direction Memory Access(EDMA) is a high-speed data transfer
+ operation. It supports data read/write between peripherals and
+ memories without using the CPU.
+ Hisilicon EDMA Controller(EDMAC) directly transfers data between
+ a memory and a peripheral, between peripherals, or between memories.
+ This avoids the CPU intervention and reduces the interrupt handling
+ overhead of the CPU.
+
config LPC18XX_DMAMUX
bool "NXP LPC18xx/43xx DMA MUX for PL080"
depends on ARCH_LPC18XX || COMPILE_TEST
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 948a8da05f8b..28c7298b671e 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -82,6 +82,7 @@ obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
obj-$(CONFIG_ZX_DMA) += zx_dma.o
obj-$(CONFIG_ST_FDMA) += st_fdma.o
obj-$(CONFIG_FSL_DPAA2_QDMA) += fsl-dpaa2-qdma/
+obj-$(CONFIG_HIEDMACV310) += hiedmacv310.o

obj-y += mediatek/
obj-y += qcom/
diff --git a/drivers/dma/hiedmacv310.c b/drivers/dma/hiedmacv310.c
new file mode 100644
index 000000000000..cd1fe30538ee
--- /dev/null
+++ b/drivers/dma/hiedmacv310.c
@@ -0,0 +1,1452 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * The Hiedma Controller v310 Device Driver for HiSilicon
+ *
+ * Copyright (c) 2019-2020, Huawei Tech. Co., Ltd.
+ *
+ * Author: Dongjiu Geng <gengdongjiu@huawei.com>
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_dma.h>
+#include <linux/pm_runtime.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#include "hiedmacv310.h"
+#include "dmaengine.h"
+#include "virt-dma.h"
+
+#define DRIVER_NAME "hiedmacv310"
+
+#define MAX_TSFR_LLIS 512
+#define EDMACV300_LLI_WORDS 64
+#define EDMACV300_POOL_ALIGN 64
+#define BITS_PER_HALF_WORD 32
+
+struct hiedmac_lli {
+ u64 next_lli;
+ u32 reserved[5];
+ u32 count;
+ u64 src_addr;
+ u64 dest_addr;
+ u32 config;
+ u32 pad[3];
+};
+
+struct hiedmac_sg {
+ dma_addr_t src_addr;
+ dma_addr_t dst_addr;
+ size_t len;
+ struct list_head node;
+};
+
+struct transfer_desc {
+ struct virt_dma_desc virt_desc;
+ dma_addr_t llis_busaddr;
+ u64 *llis_vaddr;
+ u32 ccfg;
+ size_t size;
+ bool done;
+ bool cyclic;
+};
+
+enum edmac_dma_chan_state {
+ HIEDMAC_CHAN_IDLE,
+ HIEDMAC_CHAN_RUNNING,
+ HIEDMAC_CHAN_PAUSED,
+ HIEDMAC_CHAN_WAITING,
+};
+
+struct hiedmacv310_dma_chan {
+ bool slave;
+ int signal;
+ int id;
+ struct virt_dma_chan virt_chan;
+ struct hiedmacv310_phy_chan *phychan;
+ struct dma_slave_config cfg;
+ struct transfer_desc *at;
+ struct hiedmacv310_driver_data *host;
+ enum edmac_dma_chan_state state;
+};
+
+struct hiedmacv310_phy_chan {
+ unsigned int id;
+ void __iomem *base;
+ spinlock_t lock;
+ struct hiedmacv310_dma_chan *serving;
+};
+
+struct hiedmacv310_driver_data {
+ struct platform_device *dev;
+ struct dma_device slave;
+ struct dma_device memcpy;
+ void __iomem *base;
+ struct regmap *misc_regmap;
+ void __iomem *crg_ctrl;
+ struct hiedmacv310_phy_chan *phy_chans;
+ struct dma_pool *pool;
+ unsigned int misc_ctrl_base;
+ int irq;
+ unsigned int id;
+ struct clk *clk;
+ struct clk *axi_clk;
+ struct reset_control *rstc;
+ unsigned int channels;
+ unsigned int slave_requests;
+ unsigned int max_transfer_size;
+};
+
+#ifdef DEBUG_HIEDMAC
+void dump_lli(const u64 *llis_vaddr, unsigned int num)
+{
+ struct hiedmac_lli *plli = (struct hiedmac_lli *)llis_vaddr;
+ unsigned int i;
+
+ hiedmacv310_trace(HIEDMACV310_CONFIG_TRACE_LEVEL, "lli num = 0%d", num);
+ for (i = 0; i < num; i++) {
+ hiedmacv310_info("lli%d:lli_L: 0x%llx\n", i,
+ plli[i].next_lli & 0xffffffff);
+ hiedmacv310_info("lli%d:lli_H: 0x%llx\n", i,
+ (plli[i].next_lli >> BITS_PER_HALF_WORD) & 0xffffffff);
+ hiedmacv310_info("lli%d:count: 0x%llx\n", i,
+ plli[i].count);
+ hiedmacv310_info("lli%d:src_addr_L: 0x%llx\n", i,
+ plli[i].src_addr & 0xffffffff);
+ hiedmacv310_info("lli%d:src_addr_H: 0x%llx\n", i,
+ (plli[i].src_addr >> BITS_PER_HALF_WORD) & 0xffffffff);
+ hiedmacv310_info("lli%d:dst_addr_L: 0x%llx\n", i,
+ plli[i].dest_addr & 0xffffffff);
+ hiedmacv310_info("lli%d:dst_addr_H: 0x%llx\n", i,
+ (plli[i].dest_addr >> BITS_PER_HALF_WORD) & 0xffffffff);
+ hiedmacv310_info("lli%d:CONFIG: 0x%llx\n", i,
+ plli[i].config);
+ }
+}
+
+#else
+void dump_lli(u64 *llis_vaddr, unsigned int num)
+{
+}
+#endif
+
+static inline struct hiedmacv310_dma_chan *to_edamc_chan(const struct dma_chan *chan)
+{
+ return container_of(chan, struct hiedmacv310_dma_chan, virt_chan.chan);
+}
+
+static inline struct transfer_desc *to_edmac_transfer_desc(
+ const struct dma_async_tx_descriptor *tx)
+{
+ return container_of(tx, struct transfer_desc, virt_desc.tx);
+}
+
+static struct dma_chan *hiedmac_find_chan_id(
+ const struct hiedmacv310_driver_data *hiedmac,
+ int request_num)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = NULL;
+
+ list_for_each_entry(edmac_dma_chan, &hiedmac->slave.channels,
+ virt_chan.chan.device_node) {
+ if (edmac_dma_chan->id == request_num)
+ return &edmac_dma_chan->virt_chan.chan;
+ }
+ return NULL;
+}
+
+static struct dma_chan *hiedma_of_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct hiedmacv310_driver_data *hiedmac = ofdma->of_dma_data;
+ struct hiedmacv310_dma_chan *edmac_dma_chan = NULL;
+ struct dma_chan *dma_chan = NULL;
+ struct regmap *misc = NULL;
+ unsigned int signal, request_num;
+ unsigned int reg = 0;
+ unsigned int offset = 0;
+
+ if (!hiedmac)
+ return NULL;
+
+ misc = hiedmac->misc_regmap;
+
+ if (dma_spec->args_count != 2) { /* check num of dts node args */
+ hiedmacv310_error("args count not true!");
+ return NULL;
+ }
+
+ request_num = dma_spec->args[0];
+ signal = dma_spec->args[1];
+
+ hiedmacv310_trace(HIEDMACV310_CONFIG_TRACE_LEVEL,
+ "host->id = %d,signal = %d, request_num = %d",
+ hiedmac->id, signal, request_num);
+
+ if (misc != NULL) {
+ offset = hiedmac->misc_ctrl_base + (request_num & (~0x3));
+ regmap_read(misc, offset, &reg);
+ /* set misc for signal line */
+ reg &= ~(0x3f << ((request_num & 0x3) << 3));
+ reg |= signal << ((request_num & 0x3) << 3);
+ regmap_write(misc, offset, reg);
+ }
+
+ hiedmacv310_trace(HIEDMACV310_CONFIG_TRACE_LEVEL,
+ "offset = 0x%x, reg = 0x%x", offset, reg);
+
+ dma_chan = hiedmac_find_chan_id(hiedmac, request_num);
+ if (!dma_chan) {
+ hiedmacv310_error("DMA slave channel is not found!");
+ return NULL;
+ }
+
+ edmac_dma_chan = to_edamc_chan(dma_chan);
+ edmac_dma_chan->signal = request_num;
+ return dma_get_slave_channel(dma_chan);
+}
+
+static int hiedmacv310_devm_get(struct hiedmacv310_driver_data *hiedmac)
+{
+ struct platform_device *platdev = hiedmac->dev;
+ struct resource *res = NULL;
+
+ hiedmac->clk = devm_clk_get(&(platdev->dev), "apb_pclk");
+ if (IS_ERR(hiedmac->clk))
+ return PTR_ERR(hiedmac->clk);
+
+ hiedmac->axi_clk = devm_clk_get(&(platdev->dev), "axi_aclk");
+ if (IS_ERR(hiedmac->axi_clk))
+ return PTR_ERR(hiedmac->axi_clk);
+
+ hiedmac->irq = platform_get_irq(platdev, 0);
+ if (unlikely(hiedmac->irq < 0))
+ return -ENODEV;
+
+ hiedmac->rstc = devm_reset_control_get(&(platdev->dev), "dma-reset");
+ if (IS_ERR(hiedmac->rstc))
+ return PTR_ERR(hiedmac->rstc);
+
+ res = platform_get_resource(platdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ hiedmacv310_error("no reg resource");
+ return -ENODEV;
+ }
+
+ hiedmac->base = devm_ioremap_resource(&(platdev->dev), res);
+ if (IS_ERR(hiedmac->base))
+ return PTR_ERR(hiedmac->base);
+
+ return 0;
+}
+
+static int hiedmacv310_of_property_read(struct hiedmacv310_driver_data *hiedmac)
+{
+ struct platform_device *platdev = hiedmac->dev;
+ struct device_node *np = platdev->dev.of_node;
+ int ret;
+
+ hiedmac->misc_regmap = syscon_regmap_lookup_by_phandle(np, "misc_regmap");
+ if (IS_ERR(hiedmac->misc_regmap))
+ return PTR_ERR(hiedmac->misc_regmap);
+
+ ret = of_property_read_u32(np, "misc_ctrl_base", &(hiedmac->misc_ctrl_base));
+ if (ret) {
+ hiedmacv310_error("get dma-misc_ctrl_base fail");
+ return -ENODEV;
+ }
+
+ ret = of_property_read_u32(np, "devid", &(hiedmac->id));
+ if (ret) {
+ hiedmacv310_error("get hiedmac id fail");
+ return -ENODEV;
+ }
+ ret = of_property_read_u32(np, "dma-channels", &(hiedmac->channels));
+ if (ret) {
+ hiedmacv310_error("get dma-channels fail");
+ return -ENODEV;
+ }
+ ret = of_property_read_u32(np, "dma-requests", &(hiedmac->slave_requests));
+ if (ret) {
+ hiedmacv310_error("get dma-requests fail");
+ return -ENODEV;
+ }
+ hiedmacv310_trace(HIEDMACV310_REG_TRACE_LEVEL, "dma-channels = %d, dma-requests = %d",
+ hiedmac->channels, hiedmac->slave_requests);
+ return 0;
+}
+
+static int get_of_probe(struct hiedmacv310_driver_data *hiedmac)
+{
+ struct platform_device *platdev = hiedmac->dev;
+ int ret;
+
+ ret = hiedmacv310_devm_get(hiedmac);
+ if (ret)
+ return ret;
+
+ ret = hiedmacv310_of_property_read(hiedmac);
+ if (ret)
+ return ret;
+
+ return of_dma_controller_register(platdev->dev.of_node,
+ hiedma_of_xlate, hiedmac);
+}
+
+static void hiedmac_free_chan_resources(struct dma_chan *chan)
+{
+ vchan_free_chan_resources(to_virt_chan(chan));
+}
+
+static size_t read_residue_from_phychan(
+ struct hiedmacv310_dma_chan *edmac_dma_chan,
+ struct transfer_desc *tsf_desc)
+{
+ size_t bytes;
+ u64 next_lli;
+ struct hiedmacv310_phy_chan *phychan = edmac_dma_chan->phychan;
+ unsigned int i, index;
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct hiedmac_lli *plli = NULL;
+
+ next_lli = (hiedmacv310_readl(hiedmac->base + hiedmac_cx_lli_l(phychan->id)) &
+ (~(HIEDMAC_LLI_ALIGN - 1)));
+ next_lli |= ((u64)(hiedmacv310_readl(hiedmac->base + hiedmac_cx_lli_h(
+ phychan->id)) & 0xffffffff) << BITS_PER_HALF_WORD);
+ bytes = hiedmacv310_readl(hiedmac->base + hiedmac_cx_curr_cnt0(
+ phychan->id));
+ if (next_lli != 0) {
+ /* It means lli mode */
+ bytes += tsf_desc->size;
+ index = (next_lli - tsf_desc->llis_busaddr) / sizeof(*plli);
+ plli = (struct hiedmac_lli *)(tsf_desc->llis_vaddr);
+ for (i = 0; i < index; i++)
+ bytes -= plli[i].count;
+ }
+ return bytes;
+}
+
+static enum dma_status hiedmac_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ enum dma_status ret;
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ struct virt_dma_desc *vd = NULL;
+ struct transfer_desc *tsf_desc = NULL;
+ unsigned long flags;
+ size_t bytes;
+
+ ret = dma_cookie_status(chan, cookie, txstate);
+ if (ret == DMA_COMPLETE)
+ return ret;
+
+ if (edmac_dma_chan->state == HIEDMAC_CHAN_PAUSED && ret == DMA_IN_PROGRESS) {
+ ret = DMA_PAUSED;
+ return ret;
+ }
+
+ spin_lock_irqsave(&edmac_dma_chan->virt_chan.lock, flags);
+ vd = vchan_find_desc(&edmac_dma_chan->virt_chan, cookie);
+ if (vd) {
+ /* no been trasfered */
+ tsf_desc = to_edmac_transfer_desc(&vd->tx);
+ bytes = tsf_desc->size;
+ } else {
+ /* trasfering */
+ tsf_desc = edmac_dma_chan->at;
+
+ if (!(edmac_dma_chan->phychan) || !tsf_desc) {
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+ return ret;
+ }
+ bytes = read_residue_from_phychan(edmac_dma_chan, tsf_desc);
+ }
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+ dma_set_residue(txstate, bytes);
+ return ret;
+}
+
+static struct hiedmacv310_phy_chan *hiedmac_get_phy_channel(
+ const struct hiedmacv310_driver_data *hiedmac,
+ struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ struct hiedmacv310_phy_chan *ch = NULL;
+ unsigned long flags;
+ int i;
+
+ for (i = 0; i < hiedmac->channels; i++) {
+ ch = &hiedmac->phy_chans[i];
+
+ spin_lock_irqsave(&ch->lock, flags);
+
+ if (!ch->serving) {
+ ch->serving = edmac_dma_chan;
+ spin_unlock_irqrestore(&ch->lock, flags);
+ break;
+ }
+ spin_unlock_irqrestore(&ch->lock, flags);
+ }
+
+ if (i == hiedmac->channels)
+ return NULL;
+
+ return ch;
+}
+
+static void hiedmac_write_lli(const struct hiedmacv310_driver_data *hiedmac,
+ const struct hiedmacv310_phy_chan *phychan,
+ const struct transfer_desc *tsf_desc)
+{
+ struct hiedmac_lli *plli = (struct hiedmac_lli *)tsf_desc->llis_vaddr;
+
+ if (plli->next_lli != 0x0)
+ hiedmacv310_writel((plli->next_lli & 0xffffffff) | HIEDMAC_LLI_ENABLE,
+ hiedmac->base + hiedmac_cx_lli_l(phychan->id));
+ else
+ hiedmacv310_writel((plli->next_lli & 0xffffffff),
+ hiedmac->base + hiedmac_cx_lli_l(phychan->id));
+
+ hiedmacv310_writel(((plli->next_lli >> 32) & 0xffffffff),
+ hiedmac->base + hiedmac_cx_lli_h(phychan->id));
+ hiedmacv310_writel(plli->count, hiedmac->base + hiedmac_cx_cnt0(phychan->id));
+ hiedmacv310_writel(plli->src_addr & 0xffffffff,
+ hiedmac->base + hiedmac_cx_src_addr_l(phychan->id));
+ hiedmacv310_writel((plli->src_addr >> 32) & 0xffffffff,
+ hiedmac->base + hiedmac_cx_src_addr_h(phychan->id));
+ hiedmacv310_writel(plli->dest_addr & 0xffffffff,
+ hiedmac->base + hiedmac_cx_dest_addr_l(phychan->id));
+ hiedmacv310_writel((plli->dest_addr >> 32) & 0xffffffff,
+ hiedmac->base + hiedmac_cx_dest_addr_h(phychan->id));
+ hiedmacv310_writel(plli->config,
+ hiedmac->base + hiedmac_cx_config(phychan->id));
+}
+
+static void hiedmac_start_next_txd(struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct hiedmacv310_phy_chan *phychan = edmac_dma_chan->phychan;
+ struct virt_dma_desc *vd = vchan_next_desc(&edmac_dma_chan->virt_chan);
+ struct transfer_desc *tsf_desc = to_edmac_transfer_desc(&vd->tx);
+ unsigned int val;
+
+ list_del(&tsf_desc->virt_desc.node);
+ edmac_dma_chan->at = tsf_desc;
+ hiedmac_write_lli(hiedmac, phychan, tsf_desc);
+ val = hiedmacv310_readl(hiedmac->base + hiedmac_cx_config(phychan->id));
+ hiedmacv310_trace(HIEDMACV310_REG_TRACE_LEVEL, " HIEDMAC_Cx_CONFIG = 0x%x", val);
+ hiedmacv310_writel(val | HIEDMAC_CXCONFIG_LLI_START,
+ hiedmac->base + hiedmac_cx_config(phychan->id));
+}
+
+static void hiedmac_start(struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct hiedmacv310_phy_chan *ch;
+
+ ch = hiedmac_get_phy_channel(hiedmac, edmac_dma_chan);
+ if (!ch) {
+ hiedmacv310_error("no phy channel available !");
+ edmac_dma_chan->state = HIEDMAC_CHAN_WAITING;
+ return;
+ }
+ edmac_dma_chan->phychan = ch;
+ edmac_dma_chan->state = HIEDMAC_CHAN_RUNNING;
+ hiedmac_start_next_txd(edmac_dma_chan);
+}
+
+static void hiedmac_issue_pending(struct dma_chan *chan)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&edmac_dma_chan->virt_chan.lock, flags);
+ if (vchan_issue_pending(&edmac_dma_chan->virt_chan)) {
+ if (!edmac_dma_chan->phychan && edmac_dma_chan->state != HIEDMAC_CHAN_WAITING)
+ hiedmac_start(edmac_dma_chan);
+ }
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+}
+
+static void hiedmac_free_txd_list(struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ LIST_HEAD(head);
+
+ vchan_get_all_descriptors(&edmac_dma_chan->virt_chan, &head);
+ vchan_dma_desc_free_list(&edmac_dma_chan->virt_chan, &head);
+}
+
+static int hiedmac_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+
+ if (!edmac_dma_chan->slave) {
+ hiedmacv310_error("slave is null!");
+ return -EINVAL;
+ }
+ edmac_dma_chan->cfg = *config;
+ return 0;
+}
+
+static void hiedmac_pause_phy_chan(const struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct hiedmacv310_phy_chan *phychan = edmac_dma_chan->phychan;
+ unsigned int val;
+ int timeout;
+
+ val = hiedmacv310_readl(hiedmac->base + hiedmac_cx_config(phychan->id));
+ val &= ~CCFG_EN;
+ hiedmacv310_writel(val, hiedmac->base + hiedmac_cx_config(phychan->id));
+ /* Wait for channel inactive */
+ for (timeout = 2000; timeout > 0; timeout--) {
+ if (!((0x1 << phychan->id) & hiedmacv310_readl(hiedmac->base + HIEDMAC_CH_STAT)))
+ break;
+ hiedmacv310_writel(val, hiedmac->base + hiedmac_cx_config(phychan->id));
+ udelay(1);
+ }
+ if (timeout == 0)
+ hiedmacv310_error(":channel%u timeout waiting for pause, timeout:%d",
+ phychan->id, timeout);
+}
+
+static int hiedmac_pause(struct dma_chan *chan)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&edmac_dma_chan->virt_chan.lock, flags);
+ if (!edmac_dma_chan->phychan) {
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+ return 0;
+ }
+ hiedmac_pause_phy_chan(edmac_dma_chan);
+ edmac_dma_chan->state = HIEDMAC_CHAN_PAUSED;
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+ return 0;
+}
+
+static void hiedmac_resume_phy_chan(const struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct hiedmacv310_phy_chan *phychan = edmac_dma_chan->phychan;
+ unsigned int val;
+
+ val = hiedmacv310_readl(hiedmac->base + hiedmac_cx_config(phychan->id));
+ val |= CCFG_EN;
+ hiedmacv310_writel(val, hiedmac->base + hiedmac_cx_config(phychan->id));
+}
+
+static int hiedmac_resume(struct dma_chan *chan)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&edmac_dma_chan->virt_chan.lock, flags);
+
+ if (!edmac_dma_chan->phychan) {
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+ return 0;
+ }
+
+ hiedmac_resume_phy_chan(edmac_dma_chan);
+ edmac_dma_chan->state = HIEDMAC_CHAN_RUNNING;
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+
+ return 0;
+}
+
+void hiedmac_phy_free(struct hiedmacv310_dma_chan *chan);
+static void hiedmac_desc_free(struct virt_dma_desc *vd);
+static int hiedmac_terminate_all(struct dma_chan *chan)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&edmac_dma_chan->virt_chan.lock, flags);
+ if (!edmac_dma_chan->phychan && !edmac_dma_chan->at) {
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+ return 0;
+ }
+
+ edmac_dma_chan->state = HIEDMAC_CHAN_IDLE;
+
+ if (edmac_dma_chan->phychan)
+ hiedmac_phy_free(edmac_dma_chan);
+ if (edmac_dma_chan->at) {
+ hiedmac_desc_free(&edmac_dma_chan->at->virt_desc);
+ edmac_dma_chan->at = NULL;
+ }
+ hiedmac_free_txd_list(edmac_dma_chan);
+ spin_unlock_irqrestore(&edmac_dma_chan->virt_chan.lock, flags);
+
+ return 0;
+}
+
+static u32 get_width(enum dma_slave_buswidth width)
+{
+ switch (width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ return HIEDMAC_WIDTH_8BIT;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ return HIEDMAC_WIDTH_16BIT;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ return HIEDMAC_WIDTH_32BIT;
+ case DMA_SLAVE_BUSWIDTH_8_BYTES:
+ return HIEDMAC_WIDTH_64BIT;
+ default:
+ hiedmacv310_error("check here, width warning!");
+ return ~0;
+ }
+}
+
+static unsigned int hiedmac_set_config_value(enum dma_transfer_direction direction,
+ unsigned int addr_width,
+ unsigned int burst,
+ unsigned int signal)
+{
+ unsigned int config, width;
+
+ if (direction == DMA_MEM_TO_DEV)
+ config = HIEDMAC_CONFIG_SRC_INC;
+ else
+ config = HIEDMAC_CONFIG_DST_INC;
+
+ hiedmacv310_trace(HIEDMACV310_CONFIG_TRACE_LEVEL, "addr_width = 0x%x", addr_width);
+ width = get_width(addr_width);
+ hiedmacv310_trace(HIEDMACV310_CONFIG_TRACE_LEVEL, "width = 0x%x", width);
+ config |= width << HIEDMAC_CONFIG_SRC_WIDTH_SHIFT;
+ config |= width << HIEDMAC_CONFIG_DST_WIDTH_SHIFT;
+ hiedmacv310_trace(HIEDMACV310_REG_TRACE_LEVEL, "tsf_desc->ccfg = 0x%x", config);
+ hiedmacv310_trace(HIEDMACV310_CONFIG_TRACE_LEVEL, "burst = 0x%x", burst);
+ config |= burst << HIEDMAC_CONFIG_SRC_BURST_SHIFT;
+ config |= burst << HIEDMAC_CONFIG_DST_BURST_SHIFT;
+ if (signal >= 0) {
+ hiedmacv310_trace(HIEDMACV310_REG_TRACE_LEVEL,
+ "edmac_dma_chan->signal = %d", signal);
+ config |= (unsigned int)signal << HIEDMAC_CXCONFIG_SIGNAL_SHIFT;
+ }
+ config |= HIEDMAC_CXCONFIG_DEV_MEM_TYPE << HIEDMAC_CXCONFIG_TSF_TYPE_SHIFT;
+ return config;
+}
+
+struct transfer_desc *hiedmac_init_tsf_desc(struct dma_chan *chan,
+ enum dma_transfer_direction direction,
+ dma_addr_t *slave_addr)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ struct transfer_desc *tsf_desc;
+ unsigned int burst = 0;
+ unsigned int addr_width = 0;
+ unsigned int maxburst = 0;
+
+ tsf_desc = kzalloc(sizeof(*tsf_desc), GFP_NOWAIT);
+ if (!tsf_desc)
+ return NULL;
+ if (direction == DMA_MEM_TO_DEV) {
+ *slave_addr = edmac_dma_chan->cfg.dst_addr;
+ addr_width = edmac_dma_chan->cfg.dst_addr_width;
+ maxburst = edmac_dma_chan->cfg.dst_maxburst;
+ } else if (direction == DMA_DEV_TO_MEM) {
+ *slave_addr = edmac_dma_chan->cfg.src_addr;
+ addr_width = edmac_dma_chan->cfg.src_addr_width;
+ maxburst = edmac_dma_chan->cfg.src_maxburst;
+ } else {
+ kfree(tsf_desc);
+ hiedmacv310_error("direction unsupported!");
+ return NULL;
+ }
+
+ if (maxburst > (HIEDMAC_MAX_BURST_WIDTH))
+ burst |= (HIEDMAC_MAX_BURST_WIDTH - 1);
+ else if (maxburst == 0)
+ burst |= HIEDMAC_MIN_BURST_WIDTH;
+ else
+ burst |= (maxburst - 1);
+
+ tsf_desc->ccfg = hiedmac_set_config_value(direction, addr_width,
+ burst, edmac_dma_chan->signal);
+ hiedmacv310_trace(HIEDMACV310_REG_TRACE_LEVEL, "tsf_desc->ccfg = 0x%x", tsf_desc->ccfg);
+ return tsf_desc;
+}
+
+static int hiedmac_fill_desc(const struct hiedmac_sg *dsg,
+ struct transfer_desc *tsf_desc,
+ unsigned int length, unsigned int num)
+{
+ struct hiedmac_lli *plli = NULL;
+
+ if (num >= MAX_TSFR_LLIS) {
+ hiedmacv310_error("lli out of range.");
+ return -ENOMEM;
+ }
+
+ plli = (struct hiedmac_lli *)(tsf_desc->llis_vaddr);
+ memset(&plli[num], 0x0, sizeof(*plli));
+
+ plli[num].src_addr = dsg->src_addr;
+ plli[num].dest_addr = dsg->dst_addr;
+ plli[num].config = tsf_desc->ccfg;
+ plli[num].count = length;
+ tsf_desc->size += length;
+
+ if (num > 0) {
+ plli[num - 1].next_lli = (tsf_desc->llis_busaddr + (num) * sizeof(
+ *plli)) & (~(HIEDMAC_LLI_ALIGN - 1));
+ plli[num - 1].next_lli |= HIEDMAC_LLI_ENABLE;
+ }
+ return 0;
+}
+
+static void free_dsg(struct list_head *dsg_head)
+{
+ struct hiedmac_sg *dsg = NULL;
+ struct hiedmac_sg *_dsg = NULL;
+
+ list_for_each_entry_safe(dsg, _dsg, dsg_head, node) {
+ list_del(&dsg->node);
+ kfree(dsg);
+ }
+}
+
+static int hiedmac_add_sg(struct list_head *sg_head,
+ dma_addr_t dst, dma_addr_t src,
+ size_t len)
+{
+ struct hiedmac_sg *dsg = NULL;
+
+ if (len == 0) {
+ hiedmacv310_error("Transfer length is 0.");
+ return -ENOMEM;
+ }
+
+ dsg = kzalloc(sizeof(*dsg), GFP_NOWAIT);
+ if (!dsg) {
+ free_dsg(sg_head);
+ hiedmacv310_error("alloc memory for dsg fail.");
+ return -ENOMEM;
+ }
+
+ list_add_tail(&dsg->node, sg_head);
+ dsg->src_addr = src;
+ dsg->dst_addr = dst;
+ dsg->len = len;
+ return 0;
+}
+
+static int hiedmac_add_sg_slave(struct list_head *sg_head,
+ dma_addr_t slave_addr, dma_addr_t addr,
+ size_t length,
+ enum dma_transfer_direction direction)
+{
+ dma_addr_t src = 0;
+ dma_addr_t dst = 0;
+
+ if (direction == DMA_MEM_TO_DEV) {
+ src = addr;
+ dst = slave_addr;
+ } else if (direction == DMA_DEV_TO_MEM) {
+ src = slave_addr;
+ dst = addr;
+ } else {
+ hiedmacv310_error("invali dma_transfer_direction.");
+ return -ENOMEM;
+ }
+ return hiedmac_add_sg(sg_head, dst, src, length);
+}
+
+static int hiedmac_fill_sg_for_slave(struct list_head *sg_head,
+ dma_addr_t slave_addr,
+ struct scatterlist *sgl,
+ unsigned int sg_len,
+ enum dma_transfer_direction direction)
+{
+ struct scatterlist *sg = NULL;
+ int tmp, ret;
+ size_t length;
+ dma_addr_t addr;
+
+ if (sgl == NULL) {
+ hiedmacv310_error("sgl is null!");
+ return -ENOMEM;
+ }
+
+ for_each_sg(sgl, sg, sg_len, tmp) {
+ addr = sg_dma_address(sg);
+ length = sg_dma_len(sg);
+ ret = hiedmac_add_sg_slave(sg_head, slave_addr, addr, length, direction);
+ if (ret)
+ break;
+ }
+ return ret;
+}
+
+static inline int hiedmac_fill_sg_for_memcpy(struct list_head *sg_head,
+ dma_addr_t dst, dma_addr_t src,
+ size_t len)
+{
+ return hiedmac_add_sg(sg_head, dst, src, len);
+}
+
+static int hiedmac_fill_sg_for_cyclic(struct list_head *sg_head,
+ dma_addr_t slave_addr,
+ dma_addr_t buf_addr, size_t buf_len,
+ size_t period_len,
+ enum dma_transfer_direction direction)
+{
+ size_t count_in_sg = 0;
+ size_t trans_bytes;
+ int ret;
+
+ while (count_in_sg < buf_len) {
+ trans_bytes = min(period_len, buf_len - count_in_sg);
+ count_in_sg += trans_bytes;
+ ret = hiedmac_add_sg_slave(sg_head, slave_addr,
+ buf_addr + count_in_sg,
+ count_in_sg, direction);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static inline unsigned short get_max_width(dma_addr_t ccfg)
+{
+ unsigned short src_width = (ccfg & HIEDMAC_CONTROL_SRC_WIDTH_MASK) >>
+ HIEDMAC_CONFIG_SRC_WIDTH_SHIFT;
+ unsigned short dst_width = (ccfg & HIEDMAC_CONTROL_DST_WIDTH_MASK) >>
+ HIEDMAC_CONFIG_DST_WIDTH_SHIFT;
+
+ return 1 << max(src_width, dst_width); /* to byte */
+}
+
+static int hiedmac_fill_asg_lli_for_desc(struct hiedmac_sg *dsg,
+ struct transfer_desc *tsf_desc,
+ unsigned int *lli_count)
+{
+ int ret;
+ unsigned short width = get_max_width(tsf_desc->ccfg);
+
+ while (dsg->len != 0) {
+ size_t lli_len = MAX_TRANSFER_BYTES;
+
+ lli_len = (lli_len / width) * width; /* bus width align */
+ lli_len = min(lli_len, dsg->len);
+ ret = hiedmac_fill_desc(dsg, tsf_desc, lli_len, *lli_count);
+ if (ret)
+ return ret;
+
+ if (tsf_desc->ccfg & HIEDMAC_CONFIG_SRC_INC)
+ dsg->src_addr += lli_len;
+ if (tsf_desc->ccfg & HIEDMAC_CONFIG_DST_INC)
+ dsg->dst_addr += lli_len;
+ dsg->len -= lli_len;
+ (*lli_count)++;
+ }
+ return 0;
+}
+
+static int hiedmac_fill_lli_for_desc(struct list_head *sg_head,
+ struct transfer_desc *tsf_desc)
+{
+ struct hiedmac_sg *dsg = NULL;
+ struct hiedmac_lli *last_plli = NULL;
+ unsigned int lli_count = 0;
+ int ret;
+
+ list_for_each_entry(dsg, sg_head, node) {
+ ret = hiedmac_fill_asg_lli_for_desc(dsg, tsf_desc, &lli_count);
+ if (ret)
+ return ret;
+ }
+
+ if (tsf_desc->cyclic) {
+ last_plli = (struct hiedmac_lli *)((uintptr_t)tsf_desc->llis_vaddr +
+ (lli_count - 1) * sizeof(*last_plli));
+ last_plli->next_lli = tsf_desc->llis_busaddr | HIEDMAC_LLI_ENABLE;
+ } else {
+ last_plli = (struct hiedmac_lli *)((uintptr_t)tsf_desc->llis_vaddr +
+ (lli_count - 1) * sizeof(*last_plli));
+ last_plli->next_lli = 0;
+ }
+ dump_lli(tsf_desc->llis_vaddr, lli_count);
+ return 0;
+}
+
+static struct dma_async_tx_descriptor *hiedmac_prep_slave_sg(
+ struct dma_chan *chan, struct scatterlist *sgl,
+ unsigned int sg_len, enum dma_transfer_direction direction,
+ unsigned long flags, void *context)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct transfer_desc *tsf_desc = NULL;
+ dma_addr_t slave_addr = 0;
+ int ret;
+ LIST_HEAD(sg_head);
+
+ if (sgl == NULL) {
+ hiedmacv310_error("sgl is null!");
+ return NULL;
+ }
+
+ tsf_desc = hiedmac_init_tsf_desc(chan, direction, &slave_addr);
+ if (!tsf_desc)
+ return NULL;
+
+ tsf_desc->llis_vaddr = dma_pool_alloc(hiedmac->pool, GFP_NOWAIT,
+ &tsf_desc->llis_busaddr);
+ if (!tsf_desc->llis_vaddr) {
+ hiedmacv310_error("malloc memory from pool fail !");
+ goto err_alloc_lli;
+ }
+
+ ret = hiedmac_fill_sg_for_slave(&sg_head, slave_addr, sgl, sg_len, direction);
+ if (ret)
+ goto err_fill_sg;
+ ret = hiedmac_fill_lli_for_desc(&sg_head, tsf_desc);
+ free_dsg(&sg_head);
+ if (ret)
+ goto err_fill_sg;
+ return vchan_tx_prep(&edmac_dma_chan->virt_chan, &tsf_desc->virt_desc, flags);
+
+err_fill_sg:
+ dma_pool_free(hiedmac->pool, tsf_desc->llis_vaddr, tsf_desc->llis_busaddr);
+err_alloc_lli:
+ kfree(tsf_desc);
+ return NULL;
+}
+
+static struct dma_async_tx_descriptor *hiedmac_prep_dma_memcpy(
+ struct dma_chan *chan, dma_addr_t dst, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct transfer_desc *tsf_desc = NULL;
+ LIST_HEAD(sg_head);
+ u32 config = 0;
+ int ret;
+
+ if (!len)
+ return NULL;
+
+ tsf_desc = kzalloc(sizeof(*tsf_desc), GFP_NOWAIT);
+ if (tsf_desc == NULL) {
+ hiedmacv310_error("get tsf desc fail!");
+ return NULL;
+ }
+
+ tsf_desc->llis_vaddr = dma_pool_alloc(hiedmac->pool, GFP_NOWAIT,
+ &tsf_desc->llis_busaddr);
+ if (!tsf_desc->llis_vaddr) {
+ hiedmacv310_error("malloc memory from pool fail !");
+ goto err_alloc_lli;
+ }
+
+ config |= HIEDMAC_CONFIG_SRC_INC | HIEDMAC_CONFIG_DST_INC;
+ config |= HIEDMAC_CXCONFIG_MEM_TYPE << HIEDMAC_CXCONFIG_TSF_TYPE_SHIFT;
+ /* max burst width is 16 ,but reg value set 0xf */
+ config |= (HIEDMAC_MAX_BURST_WIDTH - 1) << HIEDMAC_CONFIG_SRC_BURST_SHIFT;
+ config |= (HIEDMAC_MAX_BURST_WIDTH - 1) << HIEDMAC_CONFIG_DST_BURST_SHIFT;
+ config |= HIEDMAC_MEM_BIT_WIDTH << HIEDMAC_CONFIG_SRC_WIDTH_SHIFT;
+ config |= HIEDMAC_MEM_BIT_WIDTH << HIEDMAC_CONFIG_DST_WIDTH_SHIFT;
+ tsf_desc->ccfg = config;
+ ret = hiedmac_fill_sg_for_memcpy(&sg_head, dst, src, len);
+ if (ret)
+ goto err_fill_sg;
+ ret = hiedmac_fill_lli_for_desc(&sg_head, tsf_desc);
+ free_dsg(&sg_head);
+ if (ret)
+ goto err_fill_sg;
+ return vchan_tx_prep(&edmac_dma_chan->virt_chan, &tsf_desc->virt_desc, flags);
+
+err_fill_sg:
+ dma_pool_free(hiedmac->pool, tsf_desc->llis_vaddr, tsf_desc->llis_busaddr);
+err_alloc_lli:
+ kfree(tsf_desc);
+ return NULL;
+}
+
+
+static struct dma_async_tx_descriptor *hiedmac_prep_dma_cyclic(
+ struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
+ size_t period_len, enum dma_transfer_direction direction,
+ unsigned long flags)
+{
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(chan);
+ struct hiedmacv310_driver_data *hiedmac = edmac_dma_chan->host;
+ struct transfer_desc *tsf_desc = NULL;
+ dma_addr_t slave_addr = 0;
+ LIST_HEAD(sg_head);
+ int ret;
+
+ tsf_desc = hiedmac_init_tsf_desc(chan, direction, &slave_addr);
+ if (!tsf_desc)
+ return NULL;
+
+ tsf_desc->llis_vaddr = dma_pool_alloc(hiedmac->pool, GFP_NOWAIT,
+ &tsf_desc->llis_busaddr);
+ if (!tsf_desc->llis_vaddr) {
+ hiedmacv310_error("malloc memory from pool fail !");
+ goto err_alloc_lli;
+ }
+
+ tsf_desc->cyclic = true;
+ ret = hiedmac_fill_sg_for_cyclic(&sg_head, slave_addr, buf_addr,
+ buf_len, period_len, direction);
+ if (ret)
+ goto err_fill_sg;
+ ret = hiedmac_fill_lli_for_desc(&sg_head, tsf_desc);
+ free_dsg(&sg_head);
+ if (ret)
+ goto err_fill_sg;
+ return vchan_tx_prep(&edmac_dma_chan->virt_chan, &tsf_desc->virt_desc, flags);
+
+err_fill_sg:
+ dma_pool_free(hiedmac->pool, tsf_desc->llis_vaddr, tsf_desc->llis_busaddr);
+err_alloc_lli:
+ kfree(tsf_desc);
+ return NULL;
+}
+
+static void hiedmac_phy_reassign(struct hiedmacv310_phy_chan *phy_chan,
+ struct hiedmacv310_dma_chan *chan)
+{
+ phy_chan->serving = chan;
+ chan->phychan = phy_chan;
+ chan->state = HIEDMAC_CHAN_RUNNING;
+
+ hiedmac_start_next_txd(chan);
+}
+
+static void hiedmac_terminate_phy_chan(struct hiedmacv310_driver_data *hiedmac,
+ const struct hiedmacv310_dma_chan *edmac_dma_chan)
+{
+ unsigned int val;
+ struct hiedmacv310_phy_chan *phychan = edmac_dma_chan->phychan;
+
+ hiedmac_pause_phy_chan(edmac_dma_chan);
+ val = 0x1 << phychan->id;
+ hiedmacv310_writel(val, hiedmac->base + HIEDMAC_INT_TC1_RAW);
+ hiedmacv310_writel(val, hiedmac->base + HIEDMAC_INT_ERR1_RAW);
+ hiedmacv310_writel(val, hiedmac->base + HIEDMAC_INT_ERR2_RAW);
+}
+
+void hiedmac_phy_free(struct hiedmacv310_dma_chan *chan)
+{
+ struct hiedmacv310_driver_data *hiedmac = chan->host;
+ struct hiedmacv310_dma_chan *p = NULL;
+ struct hiedmacv310_dma_chan *next = NULL;
+
+ list_for_each_entry(p, &hiedmac->memcpy.channels, virt_chan.chan.device_node) {
+ if (p->state == HIEDMAC_CHAN_WAITING) {
+ next = p;
+ break;
+ }
+ }
+
+ if (!next) {
+ list_for_each_entry(p, &hiedmac->slave.channels, virt_chan.chan.device_node) {
+ if (p->state == HIEDMAC_CHAN_WAITING) {
+ next = p;
+ break;
+ }
+ }
+ }
+ hiedmac_terminate_phy_chan(hiedmac, chan);
+
+ if (next) {
+ spin_lock(&next->virt_chan.lock);
+ hiedmac_phy_reassign(chan->phychan, next);
+ spin_unlock(&next->virt_chan.lock);
+ } else {
+ chan->phychan->serving = NULL;
+ }
+
+ chan->phychan = NULL;
+ chan->state = HIEDMAC_CHAN_IDLE;
+}
+
+bool handle_irq(struct hiedmacv310_driver_data *hiedmac, int chan_id)
+{
+ struct hiedmacv310_dma_chan *chan = NULL;
+ struct hiedmacv310_phy_chan *phy_chan = NULL;
+ struct transfer_desc *tsf_desc = NULL;
+ unsigned int channel_tc_status;
+
+ phy_chan = &hiedmac->phy_chans[chan_id];
+ chan = phy_chan->serving;
+ if (!chan) {
+ hiedmacv310_error("error interrupt on chan: %d!", chan_id);
+ return 0;
+ }
+ tsf_desc = chan->at;
+
+ channel_tc_status = hiedmacv310_readl(hiedmac->base + HIEDMAC_INT_TC1_RAW);
+ channel_tc_status = (channel_tc_status >> chan_id) & 0x01;
+ if (channel_tc_status)
+ hiedmacv310_writel(channel_tc_status << chan_id,
+ hiedmac->base + HIEDMAC_INT_TC1_RAW);
+
+ channel_tc_status = hiedmacv310_readl(hiedmac->base + HIEDMAC_INT_TC2);
+ channel_tc_status = (channel_tc_status >> chan_id) & 0x01;
+ if (channel_tc_status)
+ hiedmacv310_writel(channel_tc_status << chan_id,
+ hiedmac->base + HIEDMAC_INT_TC2_RAW);
+
+ if ((hiedmacv310_readl(hiedmac->base + HIEDMAC_INT_ERR1) |
+ hiedmacv310_readl(hiedmac->base + HIEDMAC_INT_ERR2) |
+ hiedmacv310_readl(hiedmac->base + HIEDMAC_INT_ERR3)) &
+ (1 << chan_id)) {
+ hiedmacv310_error("Error in hiedmac %d finish!,ERR1 = 0x%x,ERR2 = 0x%x,ERR3 = 0x%x",
+ i, channel_err_status[0],
+ channel_err_status[1], channel_err_status[2]);
+ hiedmacv310_writel(1 << chan_id, hiedmac->base + HIEDMAC_INT_ERR1_RAW);
+ hiedmacv310_writel(1 << chan_id, hiedmac->base + HIEDMAC_INT_ERR2_RAW);
+ hiedmacv310_writel(1 << chan_id, hiedmac->base + HIEDMAC_INT_ERR3_RAW);
+ }
+
+ spin_lock(&chan->virt_chan.lock);
+
+ if (tsf_desc->cyclic) {
+ vchan_cyclic_callback(&tsf_desc->virt_desc);
+ spin_unlock(&chan->virt_chan.lock);
+ return 1;
+ }
+ chan->at = NULL;
+ tsf_desc->done = true;
+ vchan_cookie_complete(&tsf_desc->virt_desc);
+
+ if (vchan_next_desc(&chan->virt_chan))
+ hiedmac_start_next_txd(chan);
+ else
+ hiedmac_phy_free(chan);
+ spin_unlock(&chan->virt_chan.lock);
+ return 1;
+}
+
+static irqreturn_t hiemdacv310_irq(int irq, void *dev)
+{
+ struct hiedmacv310_driver_data *hiedmac = (struct hiedmacv310_driver_data *)dev;
+ u32 mask = 0;
+ unsigned int channel_status, temp, i;
+
+ channel_status = hiedmacv310_readl(hiedmac->base + HIEDMAC_INT_STAT);
+ if (!channel_status) {
+ hiedmacv310_error("channel_status = 0x", channel_status);
+ return IRQ_NONE;
+ }
+
+ for (i = 0; i < hiedmac->channels; i++) {
+ temp = (channel_status >> i) & 0x1;
+ if (temp)
+ mask |= handle_irq(hiedmac, i) << i;
+ }
+ return mask ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static inline void hiedmac_dma_slave_init(struct hiedmacv310_dma_chan *chan)
+{
+ chan->slave = true;
+}
+
+static void hiedmac_desc_free(struct virt_dma_desc *vd)
+{
+ struct transfer_desc *tsf_desc = to_edmac_transfer_desc(&vd->tx);
+ struct hiedmacv310_dma_chan *edmac_dma_chan = to_edamc_chan(vd->tx.chan);
+
+ dma_descriptor_unmap(&vd->tx);
+ dma_pool_free(edmac_dma_chan->host->pool, tsf_desc->llis_vaddr, tsf_desc->llis_busaddr);
+ kfree(tsf_desc);
+}
+
+static int hiedmac_init_virt_channels(struct hiedmacv310_driver_data *hiedmac,
+ struct dma_device *dmadev,
+ unsigned int channels, bool slave)
+{
+ struct hiedmacv310_dma_chan *chan = NULL;
+ int i;
+
+ INIT_LIST_HEAD(&dmadev->channels);
+ for (i = 0; i < channels; i++) {
+ chan = kzalloc(sizeof(struct hiedmacv310_dma_chan), GFP_KERNEL);
+ if (!chan) {
+ hiedmacv310_error("fail to allocate memory for virt channels!");
+ return -1;
+ }
+
+ chan->host = hiedmac;
+ chan->state = HIEDMAC_CHAN_IDLE;
+ chan->signal = -1;
+
+ if (slave) {
+ chan->id = i;
+ hiedmac_dma_slave_init(chan);
+ }
+ chan->virt_chan.desc_free = hiedmac_desc_free;
+ vchan_init(&chan->virt_chan, dmadev);
+ }
+ return 0;
+}
+
+void hiedmac_free_virt_channels(struct dma_device *dmadev)
+{
+ struct hiedmacv310_dma_chan *chan = NULL;
+ struct hiedmacv310_dma_chan *next = NULL;
+
+ list_for_each_entry_safe(chan, next, &dmadev->channels, virt_chan.chan.device_node) {
+ list_del(&chan->virt_chan.chan.device_node);
+ kfree(chan);
+ }
+}
+
+static void hiedmacv310_prep_dma_device(struct platform_device *pdev,
+ struct hiedmacv310_driver_data *hiedmac)
+{
+ dma_cap_set(DMA_MEMCPY, hiedmac->memcpy.cap_mask);
+ hiedmac->memcpy.dev = &pdev->dev;
+ hiedmac->memcpy.device_free_chan_resources = hiedmac_free_chan_resources;
+ hiedmac->memcpy.device_prep_dma_memcpy = hiedmac_prep_dma_memcpy;
+ hiedmac->memcpy.device_tx_status = hiedmac_tx_status;
+ hiedmac->memcpy.device_issue_pending = hiedmac_issue_pending;
+ hiedmac->memcpy.device_config = hiedmac_config;
+ hiedmac->memcpy.device_pause = hiedmac_pause;
+ hiedmac->memcpy.device_resume = hiedmac_resume;
+ hiedmac->memcpy.device_terminate_all = hiedmac_terminate_all;
+ hiedmac->memcpy.directions = BIT(DMA_MEM_TO_MEM);
+ hiedmac->memcpy.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
+
+ dma_cap_set(DMA_SLAVE, hiedmac->slave.cap_mask);
+ dma_cap_set(DMA_CYCLIC, hiedmac->slave.cap_mask);
+ hiedmac->slave.dev = &pdev->dev;
+ hiedmac->slave.device_free_chan_resources = hiedmac_free_chan_resources;
+ hiedmac->slave.device_tx_status = hiedmac_tx_status;
+ hiedmac->slave.device_issue_pending = hiedmac_issue_pending;
+ hiedmac->slave.device_prep_slave_sg = hiedmac_prep_slave_sg;
+ hiedmac->slave.device_prep_dma_cyclic = hiedmac_prep_dma_cyclic;
+ hiedmac->slave.device_config = hiedmac_config;
+ hiedmac->slave.device_resume = hiedmac_resume;
+ hiedmac->slave.device_pause = hiedmac_pause;
+ hiedmac->slave.device_terminate_all = hiedmac_terminate_all;
+ hiedmac->slave.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ hiedmac->slave.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
+}
+
+static int hiedmacv310_init_chan(struct hiedmacv310_driver_data *hiedmac)
+{
+ int i, ret;
+
+ hiedmac->phy_chans = kzalloc((hiedmac->channels * sizeof(
+ struct hiedmacv310_phy_chan)),
+ GFP_KERNEL);
+ if (!hiedmac->phy_chans) {
+ hiedmacv310_error("malloc for phy chans fail!");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < hiedmac->channels; i++) {
+ struct hiedmacv310_phy_chan *phy_ch = &hiedmac->phy_chans[i];
+
+ phy_ch->id = i;
+ phy_ch->base = hiedmac->base + hiedmac_cx_base(i);
+ spin_lock_init(&phy_ch->lock);
+ phy_ch->serving = NULL;
+ }
+
+ ret = hiedmac_init_virt_channels(hiedmac, &hiedmac->memcpy, hiedmac->channels,
+ false);
+ if (ret) {
+ hiedmacv310_error("fail to init memory virt channels!");
+ goto free_phychans;
+ }
+
+ ret = hiedmac_init_virt_channels(hiedmac, &hiedmac->slave, hiedmac->slave_requests,
+ true);
+ if (ret) {
+ hiedmacv310_error("fail to init slave virt channels!");
+ goto free_memory_virt_channels;
+ }
+ return 0;
+
+free_memory_virt_channels:
+ hiedmac_free_virt_channels(&hiedmac->memcpy);
+free_phychans:
+ kfree(hiedmac->phy_chans);
+ return -ENOMEM;
+}
+
+static void hiedmacv310_free_chan(struct hiedmacv310_driver_data *hiedmac)
+{
+ hiedmac_free_virt_channels(&hiedmac->slave);
+ hiedmac_free_virt_channels(&hiedmac->memcpy);
+ kfree(hiedmac->phy_chans);
+}
+
+static void hiedmacv310_prep_phy_device(const struct hiedmacv310_driver_data *hiedmac)
+{
+ clk_prepare_enable(hiedmac->clk);
+ clk_prepare_enable(hiedmac->axi_clk);
+ reset_control_deassert(hiedmac->rstc);
+
+ hiedmacv310_writel(HIEDMAC_ALL_CHAN_CLR, hiedmac->base + HIEDMAC_INT_TC1_RAW);
+ hiedmacv310_writel(HIEDMAC_ALL_CHAN_CLR, hiedmac->base + HIEDMAC_INT_TC2_RAW);
+ hiedmacv310_writel(HIEDMAC_ALL_CHAN_CLR, hiedmac->base + HIEDMAC_INT_ERR1_RAW);
+ hiedmacv310_writel(HIEDMAC_ALL_CHAN_CLR, hiedmac->base + HIEDMAC_INT_ERR2_RAW);
+ hiedmacv310_writel(HIEDMAC_ALL_CHAN_CLR, hiedmac->base + HIEDMAC_INT_ERR3_RAW);
+ hiedmacv310_writel(HIEDMAC_INT_ENABLE_ALL_CHAN,
+ hiedmac->base + HIEDMAC_INT_TC1_MASK);
+ hiedmacv310_writel(HIEDMAC_INT_ENABLE_ALL_CHAN,
+ hiedmac->base + HIEDMAC_INT_TC2_MASK);
+ hiedmacv310_writel(HIEDMAC_INT_ENABLE_ALL_CHAN,
+ hiedmac->base + HIEDMAC_INT_ERR1_MASK);
+ hiedmacv310_writel(HIEDMAC_INT_ENABLE_ALL_CHAN,
+ hiedmac->base + HIEDMAC_INT_ERR2_MASK);
+ hiedmacv310_writel(HIEDMAC_INT_ENABLE_ALL_CHAN,
+ hiedmac->base + HIEDMAC_INT_ERR3_MASK);
+}
+
+static struct hiedmacv310_driver_data *hiedmacv310_prep_hiedmac_device(struct platform_device *pdev)
+{
+ int ret;
+ struct hiedmacv310_driver_data *hiedmac = NULL;
+ ssize_t transfer_size;
+
+ ret = dma_set_mask_and_coherent(&(pdev->dev), DMA_BIT_MASK(64));
+ if (ret)
+ return NULL;
+
+ hiedmac = kzalloc(sizeof(*hiedmac), GFP_KERNEL);
+ if (!hiedmac) {
+ hiedmacv310_error("malloc for hiedmac fail!");
+ return NULL;
+ }
+
+ hiedmac->dev = pdev;
+
+ ret = get_of_probe(hiedmac);
+ if (ret) {
+ hiedmacv310_error("get dts info fail!");
+ goto free_hiedmac;
+ }
+
+ hiedmacv310_prep_dma_device(pdev, hiedmac);
+ hiedmac->max_transfer_size = MAX_TRANSFER_BYTES;
+ transfer_size = MAX_TSFR_LLIS * EDMACV300_LLI_WORDS * sizeof(u32);
+
+ hiedmac->pool = dma_pool_create(DRIVER_NAME, &(pdev->dev),
+ transfer_size, EDMACV300_POOL_ALIGN, 0);
+ if (!hiedmac->pool) {
+ hiedmacv310_error("create pool fail!");
+ goto free_hiedmac;
+ }
+
+ ret = hiedmacv310_init_chan(hiedmac);
+ if (ret)
+ goto free_pool;
+
+ return hiedmac;
+
+free_pool:
+ dma_pool_destroy(hiedmac->pool);
+free_hiedmac:
+ kfree(hiedmac);
+ return NULL;
+}
+
+static void free_hiedmac_device(struct hiedmacv310_driver_data *hiedmac)
+{
+ hiedmacv310_free_chan(hiedmac);
+ dma_pool_destroy(hiedmac->pool);
+ kfree(hiedmac);
+}
+
+static int __init hiedmacv310_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct hiedmacv310_driver_data *hiedmac = NULL;
+
+ hiedmac = hiedmacv310_prep_hiedmac_device(pdev);
+ if (hiedmac == NULL)
+ return -ENOMEM;
+
+ ret = request_irq(hiedmac->irq, hiemdacv310_irq, 0, DRIVER_NAME, hiedmac);
+ if (ret) {
+ hiedmacv310_error("fail to request irq");
+ goto free_hiedmac;
+ }
+ hiedmacv310_prep_phy_device(hiedmac);
+ ret = dma_async_device_register(&hiedmac->memcpy);
+ if (ret) {
+ hiedmacv310_error("%s failed to register memcpy as an async device - %d",
+ __func__, ret);
+ goto free_irq_res;
+ }
+
+ ret = dma_async_device_register(&hiedmac->slave);
+ if (ret) {
+ hiedmacv310_error("%s failed to register slave as an async device - %d",
+ __func__, ret);
+ goto free_memcpy_device;
+ }
+ return 0;
+
+free_memcpy_device:
+ dma_async_device_unregister(&hiedmac->memcpy);
+free_irq_res:
+ free_irq(hiedmac->irq, hiedmac);
+free_hiedmac:
+ free_hiedmac_device(hiedmac);
+ return -ENOMEM;
+}
+
+static int hiemda_remove(struct platform_device *pdev)
+{
+ int err = 0;
+ return err;
+}
+
+static const struct of_device_id hiedmacv310_match[] = {
+ { .compatible = "hisilicon,hiedmacv310" },
+ {},
+};
+
+static struct platform_driver hiedmacv310_driver = {
+ .remove = hiemda_remove,
+ .driver = {
+ .name = "hiedmacv310",
+ .of_match_table = hiedmacv310_match,
+ },
+};
+
+static int __init hiedmacv310_init(void)
+{
+ return platform_driver_probe(&hiedmacv310_driver, hiedmacv310_probe);
+}
+subsys_initcall(hiedmacv310_init);
+
+static void __exit hiedmacv310_exit(void)
+{
+ platform_driver_unregister(&hiedmacv310_driver);
+}
+module_exit(hiedmacv310_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hisilicon");
diff --git a/drivers/dma/hiedmacv310.h b/drivers/dma/hiedmacv310.h
new file mode 100644
index 000000000000..99e1720263e3
--- /dev/null
+++ b/drivers/dma/hiedmacv310.h
@@ -0,0 +1,136 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * The Hiedma Controller v310 Device Driver for HiSilicon
+ *
+ * Copyright (c) 2019-2020, Huawei Tech. Co., Ltd.
+ *
+ * Author: Dongjiu Geng <gengdongjiu@huawei.com>
+ */
+#ifndef __HIEDMACV310_H__
+#define __HIEDMACV310_H__
+
+/* debug control */
+#define HIEDMACV310_CONFIG_TRACE_LEVEL 3
+#define HIEDMACV310_TRACE_LEVEL 0
+#define HIEDMACV310_REG_TRACE_LEVEL 3
+
+#ifdef DEBUG_HIEDMAC
+#define hiedmacv310_trace(level, msg, a...) do { \
+ if ((level) >= HIEDMACV310_TRACE_LEVEL) { \
+ pr_info("%s: %d: " msg, __func__, __LINE__, ## a); \
+ } \
+} while (0)
+
+#define hiedmacv310_assert(cond) do { \
+ if (!(cond)) { \
+ pr_info("Assert:hiedmacv310:%s:%d\n", \
+ __func__, \
+ __LINE__); \
+ __WARN(); \
+ } \
+} while (0)
+
+#define hiedmacv310_error(s, a...) \
+ pr_err("hiedmacv310:%s:%d: " s, __func__, __LINE__, ## a)
+
+#define hiedmacv310_info(s, a...) \
+ pr_info("hiedmacv310:%s:%d: " s, __func__, __LINE__, ## a)
+
+#else
+
+#define hiedmacv310_trace(level, msg, a...)
+#define hiedmacv310_assert(cond)
+#define hiedmacv310_error(s, a...)
+
+#endif
+
+
+#define hiedmacv310_readl(addr) ((unsigned int)readl((void *)(addr)))
+
+#define hiedmacv310_writel(v, addr) writel(v, (void *)(addr))
+
+
+#define MAX_TRANSFER_BYTES 0xffff
+
+/* reg offset */
+#define HIEDMAC_INT_STAT 0x0
+#define HIEDMAC_INT_TC1 0x4
+#define HIEDMAC_INT_TC2 0x8
+#define HIEDMAC_INT_ERR1 0xc
+#define HIEDMAC_INT_ERR2 0x10
+#define HIEDMAC_INT_ERR3 0x14
+
+#define HIEDMAC_INT_TC1_MASK 0x18
+#define HIEDMAC_INT_TC2_MASK 0x1c
+#define HIEDMAC_INT_ERR1_MASK 0x20
+#define HIEDMAC_INT_ERR2_MASK 0x24
+#define HIEDMAC_INT_ERR3_MASK 0x28
+
+#define HIEDMAC_INT_TC1_RAW 0x600
+#define HIEDMAC_INT_TC2_RAW 0x608
+#define HIEDMAC_INT_ERR1_RAW 0x610
+#define HIEDMAC_INT_ERR2_RAW 0x618
+#define HIEDMAC_INT_ERR3_RAW 0x620
+
+#define hiedmac_cx_curr_cnt0(cn) (0x404 + (cn) * 0x20)
+#define hiedmac_cx_curr_src_addr_l(cn) (0x408 + (cn) * 0x20)
+#define hiedmac_cx_curr_src_addr_h(cn) (0x40c + (cn) * 0x20)
+#define hiedmac_cx_curr_dest_addr_l(cn) (0x410 + (cn) * 0x20)
+#define hiedmac_cx_curr_dest_addr_h(cn) (0x414 + (cn) * 0x20)
+
+#define HIEDMAC_CH_PRI 0x688
+#define HIEDMAC_CH_STAT 0x690
+#define HIEDMAC_DMA_CTRL 0x698
+
+#define hiedmac_cx_base(cn) (0x800 + (cn) * 0x40)
+#define hiedmac_cx_lli_l(cn) (0x800 + (cn) * 0x40)
+#define hiedmac_cx_lli_h(cn) (0x804 + (cn) * 0x40)
+#define hiedmac_cx_cnt0(cn) (0x81c + (cn) * 0x40)
+#define hiedmac_cx_src_addr_l(cn) (0x820 + (cn) * 0x40)
+#define hiedmac_cx_src_addr_h(cn) (0x824 + (cn) * 0x40)
+#define hiedmac_cx_dest_addr_l(cn) (0x828 + (cn) * 0x40)
+#define hiedmac_cx_dest_addr_h(cn) (0x82c + (cn) * 0x40)
+#define hiedmac_cx_config(cn) (0x830 + (cn) * 0x40)
+
+#define HIEDMAC_ALL_CHAN_CLR 0xff
+#define HIEDMAC_INT_ENABLE_ALL_CHAN 0xff
+
+
+#define HIEDMAC_CONFIG_SRC_INC (1 << 31)
+#define HIEDMAC_CONFIG_DST_INC (1 << 30)
+
+#define HIEDMAC_CONFIG_SRC_WIDTH_SHIFT 16
+#define HIEDMAC_CONFIG_DST_WIDTH_SHIFT 12
+#define HIEDMAC_WIDTH_8BIT 0b0
+#define HIEDMAC_WIDTH_16BIT 0b1
+#define HIEDMAC_WIDTH_32BIT 0b10
+#define HIEDMAC_WIDTH_64BIT 0b11
+#ifdef CONFIG_64BIT
+#define HIEDMAC_MEM_BIT_WIDTH HIEDMAC_WIDTH_64BIT
+#else
+#define HIEDMAC_MEM_BIT_WIDTH HIEDMAC_WIDTH_32BIT
+#endif
+
+#define HIEDMAC_MAX_BURST_WIDTH 16
+#define HIEDMAC_MIN_BURST_WIDTH 1
+#define HIEDMAC_CONFIG_SRC_BURST_SHIFT 24
+#define HIEDMAC_CONFIG_DST_BURST_SHIFT 20
+
+#define HIEDMAC_LLI_ALIGN 0x40
+#define HIEDMAC_LLI_DISABLE 0x0
+#define HIEDMAC_LLI_ENABLE 0x2
+
+#define HIEDMAC_CXCONFIG_SIGNAL_SHIFT 0x4
+#define HIEDMAC_CXCONFIG_MEM_TYPE 0x0
+#define HIEDMAC_CXCONFIG_DEV_MEM_TYPE 0x1
+#define HIEDMAC_CXCONFIG_TSF_TYPE_SHIFT 0x2
+#define HIEDMAC_CXCONFIG_LLI_START 0x1
+
+#define HIEDMAC_CXCONFIG_ITC_EN 0x1
+#define HIEDMAC_CXCONFIG_ITC_EN_SHIFT 0x1
+
+#define CCFG_EN 0x1
+
+#define HIEDMAC_CONTROL_SRC_WIDTH_MASK GENMASK(18, 16)
+#define HIEDMAC_CONTROL_DST_WIDTH_MASK GENMASK(14, 12)
+#endif
--
2.17.1