From: Eric Long <[email protected]>
This is one preparation patch, we can use default DMA configuration to
implement the device_prep_dma_memcpy() interface instead of issuing
sprd_dma_config().
We will implement one new sprd_dma_config() function with introducing
device_prep_slave_sg() interface in following patch. So we can remove
the obsolete sprd_dma_config() firstly.
Signed-off-by: Eric Long <[email protected]>
Signed-off-by: Baolin Wang <[email protected]>
---
drivers/dma/sprd-dma.c | 154 ++++++++++--------------------------------------
1 file changed, 32 insertions(+), 122 deletions(-)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index ccdeb8f..a7a89fd 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -552,147 +552,57 @@ static void sprd_dma_issue_pending(struct dma_chan *chan)
spin_unlock_irqrestore(&schan->vc.lock, flags);
}
-static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
- dma_addr_t dest, dma_addr_t src, size_t len)
+static struct dma_async_tx_descriptor *
+sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
+ size_t len, unsigned long flags)
{
- struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
- struct sprd_dma_chn_hw *hw = &sdesc->chn_hw;
- u32 datawidth, src_step, des_step, fragment_len;
- u32 block_len, req_mode, irq_mode, transcation_len;
- u32 fix_mode = 0, fix_en = 0;
+ struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
+ struct sprd_dma_desc *sdesc;
+ struct sprd_dma_chn_hw *hw;
+ enum sprd_dma_datawidth datawidth;
+ u32 step;
- if (IS_ALIGNED(len, 4)) {
- datawidth = SPRD_DMA_DATAWIDTH_4_BYTES;
- src_step = SPRD_DMA_WORD_STEP;
- des_step = SPRD_DMA_WORD_STEP;
- } else if (IS_ALIGNED(len, 2)) {
- datawidth = SPRD_DMA_DATAWIDTH_2_BYTES;
- src_step = SPRD_DMA_SHORT_STEP;
- des_step = SPRD_DMA_SHORT_STEP;
- } else {
- datawidth = SPRD_DMA_DATAWIDTH_1_BYTE;
- src_step = SPRD_DMA_BYTE_STEP;
- des_step = SPRD_DMA_BYTE_STEP;
- }
+ sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
+ if (!sdesc)
+ return NULL;
- fragment_len = SPRD_DMA_MEMCPY_MIN_SIZE;
- if (len <= SPRD_DMA_BLK_LEN_MASK) {
- block_len = len;
- transcation_len = 0;
- req_mode = SPRD_DMA_BLK_REQ;
- irq_mode = SPRD_DMA_BLK_INT;
- } else {
- block_len = SPRD_DMA_MEMCPY_MIN_SIZE;
- transcation_len = len;
- req_mode = SPRD_DMA_TRANS_REQ;
- irq_mode = SPRD_DMA_TRANS_INT;
- }
+ hw = &sdesc->chn_hw;
hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET;
+ hw->intc = SPRD_DMA_TRANS_INT | SPRD_DMA_CFG_ERR_INT_EN;
+ hw->src_addr = (u32)(src & SPRD_DMA_LOW_ADDR_MASK);
+ hw->des_addr = (u32)(dest & SPRD_DMA_LOW_ADDR_MASK);
hw->wrap_ptr = (u32)((src >> SPRD_DMA_HIGH_ADDR_OFFSET) &
SPRD_DMA_HIGH_ADDR_MASK);
hw->wrap_to = (u32)((dest >> SPRD_DMA_HIGH_ADDR_OFFSET) &
SPRD_DMA_HIGH_ADDR_MASK);
- hw->src_addr = (u32)(src & SPRD_DMA_LOW_ADDR_MASK);
- hw->des_addr = (u32)(dest & SPRD_DMA_LOW_ADDR_MASK);
-
- if ((src_step != 0 && des_step != 0) || (src_step | des_step) == 0) {
- fix_en = 0;
+ if (IS_ALIGNED(len, 8)) {
+ datawidth = SPRD_DMA_DATAWIDTH_8_BYTES;
+ step = SPRD_DMA_DWORD_STEP;
+ } else if (IS_ALIGNED(len, 4)) {
+ datawidth = SPRD_DMA_DATAWIDTH_4_BYTES;
+ step = SPRD_DMA_WORD_STEP;
+ } else if (IS_ALIGNED(len, 2)) {
+ datawidth = SPRD_DMA_DATAWIDTH_2_BYTES;
+ step = SPRD_DMA_SHORT_STEP;
} else {
- fix_en = 1;
- if (src_step)
- fix_mode = 1;
- else
- fix_mode = 0;
+ datawidth = SPRD_DMA_DATAWIDTH_1_BYTE;
+ step = SPRD_DMA_BYTE_STEP;
}
hw->frg_len = datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET |
datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET |
- req_mode << SPRD_DMA_REQ_MODE_OFFSET |
- fix_mode << SPRD_DMA_FIX_SEL_OFFSET |
- fix_en << SPRD_DMA_FIX_EN_OFFSET |
- (fragment_len & SPRD_DMA_FRG_LEN_MASK);
- hw->blk_len = block_len & SPRD_DMA_BLK_LEN_MASK;
-
- hw->intc = SPRD_DMA_CFG_ERR_INT_EN;
-
- switch (irq_mode) {
- case SPRD_DMA_NO_INT:
- break;
-
- case SPRD_DMA_FRAG_INT:
- hw->intc |= SPRD_DMA_FRAG_INT_EN;
- break;
-
- case SPRD_DMA_BLK_INT:
- hw->intc |= SPRD_DMA_BLK_INT_EN;
- break;
+ SPRD_DMA_TRANS_REQ << SPRD_DMA_REQ_MODE_OFFSET |
+ (len & SPRD_DMA_FRG_LEN_MASK);
+ hw->blk_len = len & SPRD_DMA_BLK_LEN_MASK;
+ hw->trsc_len = len & SPRD_DMA_TRSC_LEN_MASK;
- case SPRD_DMA_BLK_FRAG_INT:
- hw->intc |= SPRD_DMA_BLK_INT_EN | SPRD_DMA_FRAG_INT_EN;
- break;
-
- case SPRD_DMA_TRANS_INT:
- hw->intc |= SPRD_DMA_TRANS_INT_EN;
- break;
-
- case SPRD_DMA_TRANS_FRAG_INT:
- hw->intc |= SPRD_DMA_TRANS_INT_EN | SPRD_DMA_FRAG_INT_EN;
- break;
-
- case SPRD_DMA_TRANS_BLK_INT:
- hw->intc |= SPRD_DMA_TRANS_INT_EN | SPRD_DMA_BLK_INT_EN;
- break;
-
- case SPRD_DMA_LIST_INT:
- hw->intc |= SPRD_DMA_LIST_INT_EN;
- break;
-
- case SPRD_DMA_CFGERR_INT:
- hw->intc |= SPRD_DMA_CFG_ERR_INT_EN;
- break;
-
- default:
- dev_err(sdev->dma_dev.dev, "invalid irq mode\n");
- return -EINVAL;
- }
-
- if (transcation_len == 0)
- hw->trsc_len = block_len & SPRD_DMA_TRSC_LEN_MASK;
- else
- hw->trsc_len = transcation_len & SPRD_DMA_TRSC_LEN_MASK;
-
- hw->trsf_step = (des_step & SPRD_DMA_TRSF_STEP_MASK) <<
+ hw->trsf_step = (step & SPRD_DMA_TRSF_STEP_MASK) <<
SPRD_DMA_DEST_TRSF_STEP_OFFSET |
- (src_step & SPRD_DMA_TRSF_STEP_MASK) <<
+ (step & SPRD_DMA_TRSF_STEP_MASK) <<
SPRD_DMA_SRC_TRSF_STEP_OFFSET;
- hw->frg_step = 0;
- hw->src_blk_step = 0;
- hw->des_blk_step = 0;
- hw->src_blk_step = 0;
- return 0;
-}
-
-static struct dma_async_tx_descriptor *
-sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
- size_t len, unsigned long flags)
-{
- struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
- struct sprd_dma_desc *sdesc;
- int ret;
-
- sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
- if (!sdesc)
- return NULL;
-
- ret = sprd_dma_config(chan, sdesc, dest, src, len);
- if (ret) {
- kfree(sdesc);
- return NULL;
- }
-
return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
}
--
1.7.9.5
From: Eric Long <[email protected]>
This patch adds the 'device_config' and 'device_prep_slave_sg' interfaces
for users to configure DMA, as well as adding one 'struct sprd_dma_config'
structure to save Spreadtrum DMA configuration for each DMA channel.
Signed-off-by: Eric Long <[email protected]>
Signed-off-by: Baolin Wang <[email protected]>
---
drivers/dma/sprd-dma.c | 215 ++++++++++++++++++++++++++++++++++++++++++
include/linux/dma/sprd-dma.h | 4 +
2 files changed, 219 insertions(+)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index a7a89fd..d7c7ffa 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -100,6 +100,8 @@
#define SPRD_DMA_DES_DATAWIDTH_OFFSET 28
#define SPRD_DMA_SWT_MODE_OFFSET 26
#define SPRD_DMA_REQ_MODE_OFFSET 24
+#define SPRD_DMA_WRAP_SEL_OFFSET 23
+#define SPRD_DMA_WRAP_EN_OFFSET 22
#define SPRD_DMA_REQ_MODE_MASK GENMASK(1, 0)
#define SPRD_DMA_FIX_SEL_OFFSET 21
#define SPRD_DMA_FIX_EN_OFFSET 20
@@ -154,6 +156,35 @@ struct sprd_dma_chn_hw {
u32 des_blk_step;
};
+/*
+ * struct sprd_dma_config - DMA configuration structure
+ * @cfg: dma slave channel runtime config
+ * @src_addr: the source physical address
+ * @dst_addr: the destination physical address
+ * @block_len: specify one block transfer length
+ * @transcation_len: specify one transcation transfer length
+ * @src_step: source transfer step
+ * @dst_step: destination transfer step
+ * @wrap_ptr: wrap pointer address, once the transfer address reaches the
+ * 'wrap_ptr', the next transfer address will jump to the 'wrap_to' address.
+ * @wrap_to: wrap jump to address
+ * @req_mode: specify the DMA request mode
+ * @int_mode: specify the DMA interrupt type
+ */
+struct sprd_dma_config {
+ struct dma_slave_config cfg;
+ phys_addr_t src_addr;
+ phys_addr_t dst_addr;
+ u32 block_len;
+ u32 transcation_len;
+ u32 src_step;
+ u32 dst_step;
+ phys_addr_t wrap_ptr;
+ phys_addr_t wrap_to;
+ enum sprd_dma_req_mode req_mode;
+ enum sprd_dma_int_type int_mode;
+};
+
/* dma request description */
struct sprd_dma_desc {
struct virt_dma_desc vd;
@@ -164,6 +195,7 @@ struct sprd_dma_desc {
struct sprd_dma_chn {
struct virt_dma_chan vc;
void __iomem *chn_base;
+ struct sprd_dma_config slave_cfg;
u32 chn_num;
u32 dev_id;
struct sprd_dma_desc *cur_desc;
@@ -552,6 +584,121 @@ static void sprd_dma_issue_pending(struct dma_chan *chan)
spin_unlock_irqrestore(&schan->vc.lock, flags);
}
+static enum sprd_dma_datawidth
+sprd_dma_get_datawidth(enum dma_slave_buswidth buswidth)
+{
+ switch (buswidth) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ return SPRD_DMA_DATAWIDTH_1_BYTE;
+
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ return SPRD_DMA_DATAWIDTH_2_BYTES;
+
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ return SPRD_DMA_DATAWIDTH_4_BYTES;
+
+ case DMA_SLAVE_BUSWIDTH_8_BYTES:
+ return SPRD_DMA_DATAWIDTH_8_BYTES;
+
+ default:
+ return SPRD_DMA_DATAWIDTH_4_BYTES;
+ }
+}
+
+static u32 sprd_dma_get_step(enum sprd_dma_datawidth datawidth)
+{
+ switch (datawidth) {
+ case SPRD_DMA_DATAWIDTH_1_BYTE:
+ return SPRD_DMA_BYTE_STEP;
+
+ case SPRD_DMA_DATAWIDTH_2_BYTES:
+ return SPRD_DMA_SHORT_STEP;
+
+ case SPRD_DMA_DATAWIDTH_4_BYTES:
+ return SPRD_DMA_WORD_STEP;
+
+ case SPRD_DMA_DATAWIDTH_8_BYTES:
+ return SPRD_DMA_DWORD_STEP;
+
+ default:
+ return SPRD_DMA_DWORD_STEP;
+ }
+}
+
+static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
+ struct sprd_dma_config *slave_cfg)
+{
+ struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
+ struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
+ struct sprd_dma_chn_hw *hw = &sdesc->chn_hw;
+ u32 fix_mode = 0, fix_en = 0, wrap_en = 0, wrap_mode = 0;
+ u32 src_datawidth, dst_datawidth;
+
+ if (slave_cfg->cfg.slave_id)
+ schan->dev_id = slave_cfg->cfg.slave_id;
+
+ hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET;
+ hw->wrap_ptr = (u32)((slave_cfg->wrap_ptr & SPRD_DMA_LOW_ADDR_MASK) |
+ ((slave_cfg->src_addr >> SPRD_DMA_HIGH_ADDR_OFFSET) &
+ SPRD_DMA_HIGH_ADDR_MASK));
+ hw->wrap_to = (u32)((slave_cfg->wrap_to & SPRD_DMA_LOW_ADDR_MASK) |
+ ((slave_cfg->dst_addr >> SPRD_DMA_HIGH_ADDR_OFFSET) &
+ SPRD_DMA_HIGH_ADDR_MASK));
+
+ hw->src_addr = (u32)(slave_cfg->src_addr & SPRD_DMA_LOW_ADDR_MASK);
+ hw->des_addr = (u32)(slave_cfg->dst_addr & SPRD_DMA_LOW_ADDR_MASK);
+
+ if ((slave_cfg->src_step != 0 && slave_cfg->dst_step != 0)
+ || (slave_cfg->src_step | slave_cfg->dst_step) == 0) {
+ fix_en = 0;
+ } else {
+ fix_en = 1;
+ if (slave_cfg->src_step)
+ fix_mode = 1;
+ else
+ fix_mode = 0;
+ }
+
+ if (slave_cfg->wrap_ptr && slave_cfg->wrap_to) {
+ wrap_en = 1;
+ if (slave_cfg->wrap_to == slave_cfg->src_addr) {
+ wrap_mode = 0;
+ } else if (slave_cfg->wrap_to == slave_cfg->dst_addr) {
+ wrap_mode = 1;
+ } else {
+ dev_err(sdev->dma_dev.dev, "invalid wrap mode\n");
+ return -EINVAL;
+ }
+ }
+
+ hw->intc = slave_cfg->int_mode | SPRD_DMA_CFG_ERR_INT_EN;
+
+ src_datawidth = sprd_dma_get_datawidth(slave_cfg->cfg.src_addr_width);
+ dst_datawidth = sprd_dma_get_datawidth(slave_cfg->cfg.dst_addr_width);
+ hw->frg_len = src_datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET |
+ dst_datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET |
+ slave_cfg->req_mode << SPRD_DMA_REQ_MODE_OFFSET |
+ wrap_mode << SPRD_DMA_WRAP_SEL_OFFSET |
+ wrap_en << SPRD_DMA_WRAP_EN_OFFSET |
+ fix_mode << SPRD_DMA_FIX_SEL_OFFSET |
+ fix_en << SPRD_DMA_FIX_EN_OFFSET |
+ (slave_cfg->cfg.src_maxburst & SPRD_DMA_FRG_LEN_MASK);
+
+ hw->blk_len = slave_cfg->block_len & SPRD_DMA_BLK_LEN_MASK;
+
+ hw->trsc_len = slave_cfg->transcation_len & SPRD_DMA_TRSC_LEN_MASK;
+
+ hw->trsf_step = (slave_cfg->dst_step & SPRD_DMA_TRSF_STEP_MASK) <<
+ SPRD_DMA_DEST_TRSF_STEP_OFFSET |
+ (slave_cfg->src_step & SPRD_DMA_TRSF_STEP_MASK) <<
+ SPRD_DMA_SRC_TRSF_STEP_OFFSET;
+
+ hw->frg_step = 0;
+ hw->src_blk_step = 0;
+ hw->des_blk_step = 0;
+ return 0;
+}
+
static struct dma_async_tx_descriptor *
sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
size_t len, unsigned long flags)
@@ -606,6 +753,72 @@ static void sprd_dma_issue_pending(struct dma_chan *chan)
return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
}
+static struct dma_async_tx_descriptor *
+sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
+ unsigned int sglen, enum dma_transfer_direction dir,
+ unsigned long flags, void *context)
+{
+ struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
+ struct sprd_dma_config *slave_cfg = &schan->slave_cfg;
+ struct sprd_dma_desc *sdesc;
+ struct scatterlist *sg;
+ int ret, i;
+
+ /* TODO: now we only support one sg for each DMA configuration. */
+ if (!is_slave_direction(dir) || sglen > 1)
+ return NULL;
+
+ sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
+ if (!sdesc)
+ return NULL;
+
+ for_each_sg(sgl, sg, sglen, i) {
+ if (dir == DMA_MEM_TO_DEV) {
+ slave_cfg->src_addr = sg_dma_address(sg);
+ slave_cfg->dst_addr = slave_cfg->cfg.dst_addr;
+ slave_cfg->src_step =
+ sprd_dma_get_step(slave_cfg->cfg.src_addr_width);
+ slave_cfg->dst_step = SPRD_DMA_NONE_STEP;
+ } else {
+ slave_cfg->src_addr = slave_cfg->cfg.src_addr;
+ slave_cfg->dst_addr = sg_dma_address(sg);
+ slave_cfg->src_step = SPRD_DMA_NONE_STEP;
+ slave_cfg->dst_step =
+ sprd_dma_get_step(slave_cfg->cfg.dst_addr_width);
+ }
+
+ slave_cfg->block_len = sg_dma_len(sg);
+ slave_cfg->transcation_len = sg_dma_len(sg);
+ }
+
+ slave_cfg->req_mode =
+ (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK;
+ slave_cfg->int_mode = flags & SPRD_DMA_INT_MASK;
+
+ ret = sprd_dma_config(chan, sdesc, slave_cfg);
+ if (ret) {
+ kfree(sdesc);
+ return NULL;
+ }
+
+ return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
+}
+
+static int sprd_dma_slave_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
+ struct sprd_dma_config *slave_cfg = &schan->slave_cfg;
+
+ if (!is_slave_direction(config->direction))
+ return -EINVAL;
+
+ memset(slave_cfg, 0, sizeof(*slave_cfg));
+ memcpy(&slave_cfg->cfg, config, sizeof(*config));
+
+ return 0;
+}
+
static int sprd_dma_pause(struct dma_chan *chan)
{
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
@@ -733,6 +946,8 @@ static int sprd_dma_probe(struct platform_device *pdev)
sdev->dma_dev.device_tx_status = sprd_dma_tx_status;
sdev->dma_dev.device_issue_pending = sprd_dma_issue_pending;
sdev->dma_dev.device_prep_dma_memcpy = sprd_dma_prep_dma_memcpy;
+ sdev->dma_dev.device_prep_slave_sg = sprd_dma_prep_slave_sg;
+ sdev->dma_dev.device_config = sprd_dma_slave_config;
sdev->dma_dev.device_pause = sprd_dma_pause;
sdev->dma_dev.device_resume = sprd_dma_resume;
sdev->dma_dev.device_terminate_all = sprd_dma_terminate_all;
diff --git a/include/linux/dma/sprd-dma.h b/include/linux/dma/sprd-dma.h
index c545162..b0115e3 100644
--- a/include/linux/dma/sprd-dma.h
+++ b/include/linux/dma/sprd-dma.h
@@ -3,6 +3,10 @@
#ifndef _SPRD_DMA_H_
#define _SPRD_DMA_H_
+#define SPRD_DMA_REQ_SHIFT 16
+#define SPRD_DMA_FLAGS(req_mode, int_type) \
+ ((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
+
/*
* enum sprd_dma_req_mode: define the DMA request mode
* @SPRD_DMA_FRAG_REQ: fragment request mode
--
1.7.9.5
Sorry, add Vinod new email.
On 4 May 2018 at 16:01, Baolin Wang <[email protected]> wrote:
> From: Eric Long <[email protected]>
>
> This is one preparation patch, we can use default DMA configuration to
> implement the device_prep_dma_memcpy() interface instead of issuing
> sprd_dma_config().
>
> We will implement one new sprd_dma_config() function with introducing
> device_prep_slave_sg() interface in following patch. So we can remove
> the obsolete sprd_dma_config() firstly.
>
> Signed-off-by: Eric Long <[email protected]>
> Signed-off-by: Baolin Wang <[email protected]>
> ---
> drivers/dma/sprd-dma.c | 154 ++++++++++--------------------------------------
> 1 file changed, 32 insertions(+), 122 deletions(-)
>
> diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
> index ccdeb8f..a7a89fd 100644
> --- a/drivers/dma/sprd-dma.c
> +++ b/drivers/dma/sprd-dma.c
> @@ -552,147 +552,57 @@ static void sprd_dma_issue_pending(struct dma_chan *chan)
> spin_unlock_irqrestore(&schan->vc.lock, flags);
> }
>
> -static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
> - dma_addr_t dest, dma_addr_t src, size_t len)
> +static struct dma_async_tx_descriptor *
> +sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
> + size_t len, unsigned long flags)
> {
> - struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
> - struct sprd_dma_chn_hw *hw = &sdesc->chn_hw;
> - u32 datawidth, src_step, des_step, fragment_len;
> - u32 block_len, req_mode, irq_mode, transcation_len;
> - u32 fix_mode = 0, fix_en = 0;
> + struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
> + struct sprd_dma_desc *sdesc;
> + struct sprd_dma_chn_hw *hw;
> + enum sprd_dma_datawidth datawidth;
> + u32 step;
>
> - if (IS_ALIGNED(len, 4)) {
> - datawidth = SPRD_DMA_DATAWIDTH_4_BYTES;
> - src_step = SPRD_DMA_WORD_STEP;
> - des_step = SPRD_DMA_WORD_STEP;
> - } else if (IS_ALIGNED(len, 2)) {
> - datawidth = SPRD_DMA_DATAWIDTH_2_BYTES;
> - src_step = SPRD_DMA_SHORT_STEP;
> - des_step = SPRD_DMA_SHORT_STEP;
> - } else {
> - datawidth = SPRD_DMA_DATAWIDTH_1_BYTE;
> - src_step = SPRD_DMA_BYTE_STEP;
> - des_step = SPRD_DMA_BYTE_STEP;
> - }
> + sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
> + if (!sdesc)
> + return NULL;
>
> - fragment_len = SPRD_DMA_MEMCPY_MIN_SIZE;
> - if (len <= SPRD_DMA_BLK_LEN_MASK) {
> - block_len = len;
> - transcation_len = 0;
> - req_mode = SPRD_DMA_BLK_REQ;
> - irq_mode = SPRD_DMA_BLK_INT;
> - } else {
> - block_len = SPRD_DMA_MEMCPY_MIN_SIZE;
> - transcation_len = len;
> - req_mode = SPRD_DMA_TRANS_REQ;
> - irq_mode = SPRD_DMA_TRANS_INT;
> - }
> + hw = &sdesc->chn_hw;
>
> hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET;
> + hw->intc = SPRD_DMA_TRANS_INT | SPRD_DMA_CFG_ERR_INT_EN;
> + hw->src_addr = (u32)(src & SPRD_DMA_LOW_ADDR_MASK);
> + hw->des_addr = (u32)(dest & SPRD_DMA_LOW_ADDR_MASK);
> hw->wrap_ptr = (u32)((src >> SPRD_DMA_HIGH_ADDR_OFFSET) &
> SPRD_DMA_HIGH_ADDR_MASK);
> hw->wrap_to = (u32)((dest >> SPRD_DMA_HIGH_ADDR_OFFSET) &
> SPRD_DMA_HIGH_ADDR_MASK);
>
> - hw->src_addr = (u32)(src & SPRD_DMA_LOW_ADDR_MASK);
> - hw->des_addr = (u32)(dest & SPRD_DMA_LOW_ADDR_MASK);
> -
> - if ((src_step != 0 && des_step != 0) || (src_step | des_step) == 0) {
> - fix_en = 0;
> + if (IS_ALIGNED(len, 8)) {
> + datawidth = SPRD_DMA_DATAWIDTH_8_BYTES;
> + step = SPRD_DMA_DWORD_STEP;
> + } else if (IS_ALIGNED(len, 4)) {
> + datawidth = SPRD_DMA_DATAWIDTH_4_BYTES;
> + step = SPRD_DMA_WORD_STEP;
> + } else if (IS_ALIGNED(len, 2)) {
> + datawidth = SPRD_DMA_DATAWIDTH_2_BYTES;
> + step = SPRD_DMA_SHORT_STEP;
> } else {
> - fix_en = 1;
> - if (src_step)
> - fix_mode = 1;
> - else
> - fix_mode = 0;
> + datawidth = SPRD_DMA_DATAWIDTH_1_BYTE;
> + step = SPRD_DMA_BYTE_STEP;
> }
>
> hw->frg_len = datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET |
> datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET |
> - req_mode << SPRD_DMA_REQ_MODE_OFFSET |
> - fix_mode << SPRD_DMA_FIX_SEL_OFFSET |
> - fix_en << SPRD_DMA_FIX_EN_OFFSET |
> - (fragment_len & SPRD_DMA_FRG_LEN_MASK);
> - hw->blk_len = block_len & SPRD_DMA_BLK_LEN_MASK;
> -
> - hw->intc = SPRD_DMA_CFG_ERR_INT_EN;
> -
> - switch (irq_mode) {
> - case SPRD_DMA_NO_INT:
> - break;
> -
> - case SPRD_DMA_FRAG_INT:
> - hw->intc |= SPRD_DMA_FRAG_INT_EN;
> - break;
> -
> - case SPRD_DMA_BLK_INT:
> - hw->intc |= SPRD_DMA_BLK_INT_EN;
> - break;
> + SPRD_DMA_TRANS_REQ << SPRD_DMA_REQ_MODE_OFFSET |
> + (len & SPRD_DMA_FRG_LEN_MASK);
> + hw->blk_len = len & SPRD_DMA_BLK_LEN_MASK;
> + hw->trsc_len = len & SPRD_DMA_TRSC_LEN_MASK;
>
> - case SPRD_DMA_BLK_FRAG_INT:
> - hw->intc |= SPRD_DMA_BLK_INT_EN | SPRD_DMA_FRAG_INT_EN;
> - break;
> -
> - case SPRD_DMA_TRANS_INT:
> - hw->intc |= SPRD_DMA_TRANS_INT_EN;
> - break;
> -
> - case SPRD_DMA_TRANS_FRAG_INT:
> - hw->intc |= SPRD_DMA_TRANS_INT_EN | SPRD_DMA_FRAG_INT_EN;
> - break;
> -
> - case SPRD_DMA_TRANS_BLK_INT:
> - hw->intc |= SPRD_DMA_TRANS_INT_EN | SPRD_DMA_BLK_INT_EN;
> - break;
> -
> - case SPRD_DMA_LIST_INT:
> - hw->intc |= SPRD_DMA_LIST_INT_EN;
> - break;
> -
> - case SPRD_DMA_CFGERR_INT:
> - hw->intc |= SPRD_DMA_CFG_ERR_INT_EN;
> - break;
> -
> - default:
> - dev_err(sdev->dma_dev.dev, "invalid irq mode\n");
> - return -EINVAL;
> - }
> -
> - if (transcation_len == 0)
> - hw->trsc_len = block_len & SPRD_DMA_TRSC_LEN_MASK;
> - else
> - hw->trsc_len = transcation_len & SPRD_DMA_TRSC_LEN_MASK;
> -
> - hw->trsf_step = (des_step & SPRD_DMA_TRSF_STEP_MASK) <<
> + hw->trsf_step = (step & SPRD_DMA_TRSF_STEP_MASK) <<
> SPRD_DMA_DEST_TRSF_STEP_OFFSET |
> - (src_step & SPRD_DMA_TRSF_STEP_MASK) <<
> + (step & SPRD_DMA_TRSF_STEP_MASK) <<
> SPRD_DMA_SRC_TRSF_STEP_OFFSET;
>
> - hw->frg_step = 0;
> - hw->src_blk_step = 0;
> - hw->des_blk_step = 0;
> - hw->src_blk_step = 0;
> - return 0;
> -}
> -
> -static struct dma_async_tx_descriptor *
> -sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
> - size_t len, unsigned long flags)
> -{
> - struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
> - struct sprd_dma_desc *sdesc;
> - int ret;
> -
> - sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
> - if (!sdesc)
> - return NULL;
> -
> - ret = sprd_dma_config(chan, sdesc, dest, src, len);
> - if (ret) {
> - kfree(sdesc);
> - return NULL;
> - }
> -
> return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
> }
>
> --
> 1.7.9.5
>
--
Baolin.wang
Best Regards
Add Vinod new email.
On 4 May 2018 at 16:01, Baolin Wang <[email protected]> wrote:
> From: Eric Long <[email protected]>
>
> This patch adds the 'device_config' and 'device_prep_slave_sg' interfaces
> for users to configure DMA, as well as adding one 'struct sprd_dma_config'
> structure to save Spreadtrum DMA configuration for each DMA channel.
>
> Signed-off-by: Eric Long <[email protected]>
> Signed-off-by: Baolin Wang <[email protected]>
> ---
> drivers/dma/sprd-dma.c | 215 ++++++++++++++++++++++++++++++++++++++++++
> include/linux/dma/sprd-dma.h | 4 +
> 2 files changed, 219 insertions(+)
>
> diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
> index a7a89fd..d7c7ffa 100644
> --- a/drivers/dma/sprd-dma.c
> +++ b/drivers/dma/sprd-dma.c
> @@ -100,6 +100,8 @@
> #define SPRD_DMA_DES_DATAWIDTH_OFFSET 28
> #define SPRD_DMA_SWT_MODE_OFFSET 26
> #define SPRD_DMA_REQ_MODE_OFFSET 24
> +#define SPRD_DMA_WRAP_SEL_OFFSET 23
> +#define SPRD_DMA_WRAP_EN_OFFSET 22
> #define SPRD_DMA_REQ_MODE_MASK GENMASK(1, 0)
> #define SPRD_DMA_FIX_SEL_OFFSET 21
> #define SPRD_DMA_FIX_EN_OFFSET 20
> @@ -154,6 +156,35 @@ struct sprd_dma_chn_hw {
> u32 des_blk_step;
> };
>
> +/*
> + * struct sprd_dma_config - DMA configuration structure
> + * @cfg: dma slave channel runtime config
> + * @src_addr: the source physical address
> + * @dst_addr: the destination physical address
> + * @block_len: specify one block transfer length
> + * @transcation_len: specify one transcation transfer length
> + * @src_step: source transfer step
> + * @dst_step: destination transfer step
> + * @wrap_ptr: wrap pointer address, once the transfer address reaches the
> + * 'wrap_ptr', the next transfer address will jump to the 'wrap_to' address.
> + * @wrap_to: wrap jump to address
> + * @req_mode: specify the DMA request mode
> + * @int_mode: specify the DMA interrupt type
> + */
> +struct sprd_dma_config {
> + struct dma_slave_config cfg;
> + phys_addr_t src_addr;
> + phys_addr_t dst_addr;
> + u32 block_len;
> + u32 transcation_len;
> + u32 src_step;
> + u32 dst_step;
> + phys_addr_t wrap_ptr;
> + phys_addr_t wrap_to;
> + enum sprd_dma_req_mode req_mode;
> + enum sprd_dma_int_type int_mode;
> +};
> +
> /* dma request description */
> struct sprd_dma_desc {
> struct virt_dma_desc vd;
> @@ -164,6 +195,7 @@ struct sprd_dma_desc {
> struct sprd_dma_chn {
> struct virt_dma_chan vc;
> void __iomem *chn_base;
> + struct sprd_dma_config slave_cfg;
> u32 chn_num;
> u32 dev_id;
> struct sprd_dma_desc *cur_desc;
> @@ -552,6 +584,121 @@ static void sprd_dma_issue_pending(struct dma_chan *chan)
> spin_unlock_irqrestore(&schan->vc.lock, flags);
> }
>
> +static enum sprd_dma_datawidth
> +sprd_dma_get_datawidth(enum dma_slave_buswidth buswidth)
> +{
> + switch (buswidth) {
> + case DMA_SLAVE_BUSWIDTH_1_BYTE:
> + return SPRD_DMA_DATAWIDTH_1_BYTE;
> +
> + case DMA_SLAVE_BUSWIDTH_2_BYTES:
> + return SPRD_DMA_DATAWIDTH_2_BYTES;
> +
> + case DMA_SLAVE_BUSWIDTH_4_BYTES:
> + return SPRD_DMA_DATAWIDTH_4_BYTES;
> +
> + case DMA_SLAVE_BUSWIDTH_8_BYTES:
> + return SPRD_DMA_DATAWIDTH_8_BYTES;
> +
> + default:
> + return SPRD_DMA_DATAWIDTH_4_BYTES;
> + }
> +}
> +
> +static u32 sprd_dma_get_step(enum sprd_dma_datawidth datawidth)
> +{
> + switch (datawidth) {
> + case SPRD_DMA_DATAWIDTH_1_BYTE:
> + return SPRD_DMA_BYTE_STEP;
> +
> + case SPRD_DMA_DATAWIDTH_2_BYTES:
> + return SPRD_DMA_SHORT_STEP;
> +
> + case SPRD_DMA_DATAWIDTH_4_BYTES:
> + return SPRD_DMA_WORD_STEP;
> +
> + case SPRD_DMA_DATAWIDTH_8_BYTES:
> + return SPRD_DMA_DWORD_STEP;
> +
> + default:
> + return SPRD_DMA_DWORD_STEP;
> + }
> +}
> +
> +static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
> + struct sprd_dma_config *slave_cfg)
> +{
> + struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
> + struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
> + struct sprd_dma_chn_hw *hw = &sdesc->chn_hw;
> + u32 fix_mode = 0, fix_en = 0, wrap_en = 0, wrap_mode = 0;
> + u32 src_datawidth, dst_datawidth;
> +
> + if (slave_cfg->cfg.slave_id)
> + schan->dev_id = slave_cfg->cfg.slave_id;
> +
> + hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET;
> + hw->wrap_ptr = (u32)((slave_cfg->wrap_ptr & SPRD_DMA_LOW_ADDR_MASK) |
> + ((slave_cfg->src_addr >> SPRD_DMA_HIGH_ADDR_OFFSET) &
> + SPRD_DMA_HIGH_ADDR_MASK));
> + hw->wrap_to = (u32)((slave_cfg->wrap_to & SPRD_DMA_LOW_ADDR_MASK) |
> + ((slave_cfg->dst_addr >> SPRD_DMA_HIGH_ADDR_OFFSET) &
> + SPRD_DMA_HIGH_ADDR_MASK));
> +
> + hw->src_addr = (u32)(slave_cfg->src_addr & SPRD_DMA_LOW_ADDR_MASK);
> + hw->des_addr = (u32)(slave_cfg->dst_addr & SPRD_DMA_LOW_ADDR_MASK);
> +
> + if ((slave_cfg->src_step != 0 && slave_cfg->dst_step != 0)
> + || (slave_cfg->src_step | slave_cfg->dst_step) == 0) {
> + fix_en = 0;
> + } else {
> + fix_en = 1;
> + if (slave_cfg->src_step)
> + fix_mode = 1;
> + else
> + fix_mode = 0;
> + }
> +
> + if (slave_cfg->wrap_ptr && slave_cfg->wrap_to) {
> + wrap_en = 1;
> + if (slave_cfg->wrap_to == slave_cfg->src_addr) {
> + wrap_mode = 0;
> + } else if (slave_cfg->wrap_to == slave_cfg->dst_addr) {
> + wrap_mode = 1;
> + } else {
> + dev_err(sdev->dma_dev.dev, "invalid wrap mode\n");
> + return -EINVAL;
> + }
> + }
> +
> + hw->intc = slave_cfg->int_mode | SPRD_DMA_CFG_ERR_INT_EN;
> +
> + src_datawidth = sprd_dma_get_datawidth(slave_cfg->cfg.src_addr_width);
> + dst_datawidth = sprd_dma_get_datawidth(slave_cfg->cfg.dst_addr_width);
> + hw->frg_len = src_datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET |
> + dst_datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET |
> + slave_cfg->req_mode << SPRD_DMA_REQ_MODE_OFFSET |
> + wrap_mode << SPRD_DMA_WRAP_SEL_OFFSET |
> + wrap_en << SPRD_DMA_WRAP_EN_OFFSET |
> + fix_mode << SPRD_DMA_FIX_SEL_OFFSET |
> + fix_en << SPRD_DMA_FIX_EN_OFFSET |
> + (slave_cfg->cfg.src_maxburst & SPRD_DMA_FRG_LEN_MASK);
> +
> + hw->blk_len = slave_cfg->block_len & SPRD_DMA_BLK_LEN_MASK;
> +
> + hw->trsc_len = slave_cfg->transcation_len & SPRD_DMA_TRSC_LEN_MASK;
> +
> + hw->trsf_step = (slave_cfg->dst_step & SPRD_DMA_TRSF_STEP_MASK) <<
> + SPRD_DMA_DEST_TRSF_STEP_OFFSET |
> + (slave_cfg->src_step & SPRD_DMA_TRSF_STEP_MASK) <<
> + SPRD_DMA_SRC_TRSF_STEP_OFFSET;
> +
> + hw->frg_step = 0;
> + hw->src_blk_step = 0;
> + hw->des_blk_step = 0;
> + return 0;
> +}
> +
> static struct dma_async_tx_descriptor *
> sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
> size_t len, unsigned long flags)
> @@ -606,6 +753,72 @@ static void sprd_dma_issue_pending(struct dma_chan *chan)
> return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
> }
>
> +static struct dma_async_tx_descriptor *
> +sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
> + unsigned int sglen, enum dma_transfer_direction dir,
> + unsigned long flags, void *context)
> +{
> + struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
> + struct sprd_dma_config *slave_cfg = &schan->slave_cfg;
> + struct sprd_dma_desc *sdesc;
> + struct scatterlist *sg;
> + int ret, i;
> +
> + /* TODO: now we only support one sg for each DMA configuration. */
> + if (!is_slave_direction(dir) || sglen > 1)
> + return NULL;
> +
> + sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
> + if (!sdesc)
> + return NULL;
> +
> + for_each_sg(sgl, sg, sglen, i) {
> + if (dir == DMA_MEM_TO_DEV) {
> + slave_cfg->src_addr = sg_dma_address(sg);
> + slave_cfg->dst_addr = slave_cfg->cfg.dst_addr;
> + slave_cfg->src_step =
> + sprd_dma_get_step(slave_cfg->cfg.src_addr_width);
> + slave_cfg->dst_step = SPRD_DMA_NONE_STEP;
> + } else {
> + slave_cfg->src_addr = slave_cfg->cfg.src_addr;
> + slave_cfg->dst_addr = sg_dma_address(sg);
> + slave_cfg->src_step = SPRD_DMA_NONE_STEP;
> + slave_cfg->dst_step =
> + sprd_dma_get_step(slave_cfg->cfg.dst_addr_width);
> + }
> +
> + slave_cfg->block_len = sg_dma_len(sg);
> + slave_cfg->transcation_len = sg_dma_len(sg);
> + }
> +
> + slave_cfg->req_mode =
> + (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK;
> + slave_cfg->int_mode = flags & SPRD_DMA_INT_MASK;
> +
> + ret = sprd_dma_config(chan, sdesc, slave_cfg);
> + if (ret) {
> + kfree(sdesc);
> + return NULL;
> + }
> +
> + return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
> +}
> +
> +static int sprd_dma_slave_config(struct dma_chan *chan,
> + struct dma_slave_config *config)
> +{
> + struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
> + struct sprd_dma_config *slave_cfg = &schan->slave_cfg;
> +
> + if (!is_slave_direction(config->direction))
> + return -EINVAL;
> +
> + memset(slave_cfg, 0, sizeof(*slave_cfg));
> + memcpy(&slave_cfg->cfg, config, sizeof(*config));
> +
> + return 0;
> +}
> +
> static int sprd_dma_pause(struct dma_chan *chan)
> {
> struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
> @@ -733,6 +946,8 @@ static int sprd_dma_probe(struct platform_device *pdev)
> sdev->dma_dev.device_tx_status = sprd_dma_tx_status;
> sdev->dma_dev.device_issue_pending = sprd_dma_issue_pending;
> sdev->dma_dev.device_prep_dma_memcpy = sprd_dma_prep_dma_memcpy;
> + sdev->dma_dev.device_prep_slave_sg = sprd_dma_prep_slave_sg;
> + sdev->dma_dev.device_config = sprd_dma_slave_config;
> sdev->dma_dev.device_pause = sprd_dma_pause;
> sdev->dma_dev.device_resume = sprd_dma_resume;
> sdev->dma_dev.device_terminate_all = sprd_dma_terminate_all;
> diff --git a/include/linux/dma/sprd-dma.h b/include/linux/dma/sprd-dma.h
> index c545162..b0115e3 100644
> --- a/include/linux/dma/sprd-dma.h
> +++ b/include/linux/dma/sprd-dma.h
> @@ -3,6 +3,10 @@
> #ifndef _SPRD_DMA_H_
> #define _SPRD_DMA_H_
>
> +#define SPRD_DMA_REQ_SHIFT 16
> +#define SPRD_DMA_FLAGS(req_mode, int_type) \
> + ((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
> +
> /*
> * enum sprd_dma_req_mode: define the DMA request mode
> * @SPRD_DMA_FRAG_REQ: fragment request mode
> --
> 1.7.9.5
>
--
Baolin.wang
Best Regards
Hi Eric,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on slave-dma/next]
[also build test WARNING on next-20180504]
[cannot apply to linus/master v4.17-rc3]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Baolin-Wang/dmaengine-sprd-Optimize-the-sprd_dma_prep_dma_memcpy/20180505-071137
base: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/slave-dma.git next
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> drivers/dma/sprd-dma.c:780:57: sparse: mixing different enum types
drivers/dma/sprd-dma.c:780:57: int enum dma_slave_buswidth versus
drivers/dma/sprd-dma.c:780:57: int enum sprd_dma_datawidth
drivers/dma/sprd-dma.c:787:57: sparse: mixing different enum types
drivers/dma/sprd-dma.c:787:57: int enum dma_slave_buswidth versus
drivers/dma/sprd-dma.c:787:57: int enum sprd_dma_datawidth
vim +780 drivers/dma/sprd-dma.c
755
756 static struct dma_async_tx_descriptor *
757 sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
758 unsigned int sglen, enum dma_transfer_direction dir,
759 unsigned long flags, void *context)
760 {
761 struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
762 struct sprd_dma_config *slave_cfg = &schan->slave_cfg;
763 struct sprd_dma_desc *sdesc;
764 struct scatterlist *sg;
765 int ret, i;
766
767 /* TODO: now we only support one sg for each DMA configuration. */
768 if (!is_slave_direction(dir) || sglen > 1)
769 return NULL;
770
771 sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
772 if (!sdesc)
773 return NULL;
774
775 for_each_sg(sgl, sg, sglen, i) {
776 if (dir == DMA_MEM_TO_DEV) {
777 slave_cfg->src_addr = sg_dma_address(sg);
778 slave_cfg->dst_addr = slave_cfg->cfg.dst_addr;
779 slave_cfg->src_step =
> 780 sprd_dma_get_step(slave_cfg->cfg.src_addr_width);
781 slave_cfg->dst_step = SPRD_DMA_NONE_STEP;
782 } else {
783 slave_cfg->src_addr = slave_cfg->cfg.src_addr;
784 slave_cfg->dst_addr = sg_dma_address(sg);
785 slave_cfg->src_step = SPRD_DMA_NONE_STEP;
786 slave_cfg->dst_step =
787 sprd_dma_get_step(slave_cfg->cfg.dst_addr_width);
788 }
789
790 slave_cfg->block_len = sg_dma_len(sg);
791 slave_cfg->transcation_len = sg_dma_len(sg);
792 }
793
794 slave_cfg->req_mode =
795 (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK;
796 slave_cfg->int_mode = flags & SPRD_DMA_INT_MASK;
797
798 ret = sprd_dma_config(chan, sdesc, slave_cfg);
799 if (ret) {
800 kfree(sdesc);
801 return NULL;
802 }
803
804 return vchan_tx_prep(&schan->vc, &sdesc->vd, flags);
805 }
806
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
On 5 May 2018 at 13:54, kbuild test robot <[email protected]> wrote:
> Hi Eric,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on slave-dma/next]
> [also build test WARNING on next-20180504]
> [cannot apply to linus/master v4.17-rc3]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Baolin-Wang/dmaengine-sprd-Optimize-the-sprd_dma_prep_dma_memcpy/20180505-071137
> base: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/slave-dma.git next
> reproduce:
> # apt-get install sparse
> make ARCH=x86_64 allmodconfig
> make C=1 CF=-D__CHECK_ENDIAN__
>
>
> sparse warnings: (new ones prefixed by >>)
>
>>> drivers/dma/sprd-dma.c:780:57: sparse: mixing different enum types
> drivers/dma/sprd-dma.c:780:57: int enum dma_slave_buswidth versus
> drivers/dma/sprd-dma.c:780:57: int enum sprd_dma_datawidth
> drivers/dma/sprd-dma.c:787:57: sparse: mixing different enum types
> drivers/dma/sprd-dma.c:787:57: int enum dma_slave_buswidth versus
> drivers/dma/sprd-dma.c:787:57: int enum sprd_dma_datawidth
>
> vim +780 drivers/dma/sprd-dma.c
Sorry, It's one mistake. Eric will fix it in next version.
--
Baolin.wang
Best Regards