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-rw-r--r--drivers/dma/xilinx/xilinx_dma.c155
1 files changed, 8 insertions, 147 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 41189b6d4301..6d4586550f56 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -116,7 +116,7 @@
#define XILINX_VDMA_ENABLE_VERTICAL_FLIP BIT(0)
/* HW specific definitions */
-#define XILINX_DMA_MAX_CHANS_PER_DEVICE 0x20
+#define XILINX_DMA_MAX_CHANS_PER_DEVICE 0x2
#define XILINX_DMA_DMAXR_ALL_IRQ_MASK \
(XILINX_DMA_DMASR_FRM_CNT_IRQ | \
@@ -170,18 +170,6 @@
#define XILINX_DMA_NUM_DESCS 255
#define XILINX_DMA_NUM_APP_WORDS 5
-/* Multi-Channel DMA Descriptor offsets*/
-#define XILINX_DMA_MCRX_CDESC(x) (0x40 + (x-1) * 0x20)
-#define XILINX_DMA_MCRX_TDESC(x) (0x48 + (x-1) * 0x20)
-
-/* Multi-Channel DMA Masks/Shifts */
-#define XILINX_DMA_BD_HSIZE_MASK GENMASK(15, 0)
-#define XILINX_DMA_BD_STRIDE_MASK GENMASK(15, 0)
-#define XILINX_DMA_BD_VSIZE_MASK GENMASK(31, 19)
-#define XILINX_DMA_BD_TDEST_MASK GENMASK(4, 0)
-#define XILINX_DMA_BD_STRIDE_SHIFT 0
-#define XILINX_DMA_BD_VSIZE_SHIFT 19
-
/* AXI CDMA Specific Registers/Offsets */
#define XILINX_CDMA_REG_SRCADDR 0x18
#define XILINX_CDMA_REG_DSTADDR 0x20
@@ -218,8 +206,8 @@ struct xilinx_vdma_desc_hw {
* @next_desc_msb: MSB of Next Descriptor Pointer @0x04
* @buf_addr: Buffer address @0x08
* @buf_addr_msb: MSB of Buffer address @0x0C
- * @mcdma_control: Control field for mcdma @0x10
- * @vsize_stride: Vsize and Stride field for mcdma @0x14
+ * @reserved1: Reserved @0x10
+ * @reserved2: Reserved @0x14
* @control: Control field @0x18
* @status: Status field @0x1C
* @app: APP Fields @0x20 - 0x30
@@ -229,8 +217,8 @@ struct xilinx_axidma_desc_hw {
u32 next_desc_msb;
u32 buf_addr;
u32 buf_addr_msb;
- u32 mcdma_control;
- u32 vsize_stride;
+ u32 reserved1;
+ u32 reserved2;
u32 control;
u32 status;
u32 app[XILINX_DMA_NUM_APP_WORDS];
@@ -346,7 +334,6 @@ struct xilinx_dma_tx_descriptor {
* @cyclic_seg_p: Physical allocated segments base for cyclic dma
* @start_transfer: Differentiate b/w DMA IP's transfer
* @stop_transfer: Differentiate b/w DMA IP's quiesce
- * @tdest: TDEST value for mcdma
* @has_vflip: S2MM vertical flip
*/
struct xilinx_dma_chan {
@@ -382,7 +369,6 @@ struct xilinx_dma_chan {
dma_addr_t cyclic_seg_p;
void (*start_transfer)(struct xilinx_dma_chan *chan);
int (*stop_transfer)(struct xilinx_dma_chan *chan);
- u16 tdest;
bool has_vflip;
};
@@ -413,7 +399,6 @@ struct xilinx_dma_config {
* @dev: Device Structure
* @common: DMA device structure
* @chan: Driver specific DMA channel
- * @mcdma: Specifies whether Multi-Channel is present or not
* @flush_on_fsync: Flush on frame sync
* @ext_addr: Indicates 64 bit addressing is supported by dma device
* @pdev: Platform device structure pointer
@@ -432,7 +417,6 @@ struct xilinx_dma_device {
struct device *dev;
struct dma_device common;
struct xilinx_dma_chan *chan[XILINX_DMA_MAX_CHANS_PER_DEVICE];
- bool mcdma;
u32 flush_on_fsync;
bool ext_addr;
struct platform_device *pdev;
@@ -1344,53 +1328,23 @@ static void xilinx_dma_start_transfer(struct xilinx_dma_chan *chan)
dma_ctrl_write(chan, XILINX_DMA_REG_DMACR, reg);
}
- if (chan->has_sg && !chan->xdev->mcdma)
+ if (chan->has_sg)
xilinx_write(chan, XILINX_DMA_REG_CURDESC,
head_desc->async_tx.phys);
- if (chan->has_sg && chan->xdev->mcdma) {
- if (chan->direction == DMA_MEM_TO_DEV) {
- dma_ctrl_write(chan, XILINX_DMA_REG_CURDESC,
- head_desc->async_tx.phys);
- } else {
- if (!chan->tdest) {
- dma_ctrl_write(chan, XILINX_DMA_REG_CURDESC,
- head_desc->async_tx.phys);
- } else {
- dma_ctrl_write(chan,
- XILINX_DMA_MCRX_CDESC(chan->tdest),
- head_desc->async_tx.phys);
- }
- }
- }
-
xilinx_dma_start(chan);
if (chan->err)
return;
/* Start the transfer */
- if (chan->has_sg && !chan->xdev->mcdma) {
+ if (chan->has_sg) {
if (chan->cyclic)
xilinx_write(chan, XILINX_DMA_REG_TAILDESC,
chan->cyclic_seg_v->phys);
else
xilinx_write(chan, XILINX_DMA_REG_TAILDESC,
tail_segment->phys);
- } else if (chan->has_sg && chan->xdev->mcdma) {
- if (chan->direction == DMA_MEM_TO_DEV) {
- dma_ctrl_write(chan, XILINX_DMA_REG_TAILDESC,
- tail_segment->phys);
- } else {
- if (!chan->tdest) {
- dma_ctrl_write(chan, XILINX_DMA_REG_TAILDESC,
- tail_segment->phys);
- } else {
- dma_ctrl_write(chan,
- XILINX_DMA_MCRX_TDESC(chan->tdest),
- tail_segment->phys);
- }
- }
} else {
struct xilinx_axidma_tx_segment *segment;
struct xilinx_axidma_desc_hw *hw;
@@ -2017,90 +1971,6 @@ error:
}
/**
- * xilinx_dma_prep_interleaved - prepare a descriptor for a
- * DMA_SLAVE transaction
- * @dchan: DMA channel
- * @xt: Interleaved template pointer
- * @flags: transfer ack flags
- *
- * Return: Async transaction descriptor on success and NULL on failure
- */
-static struct dma_async_tx_descriptor *
-xilinx_dma_prep_interleaved(struct dma_chan *dchan,
- struct dma_interleaved_template *xt,
- unsigned long flags)
-{
- struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
- struct xilinx_dma_tx_descriptor *desc;
- struct xilinx_axidma_tx_segment *segment;
- struct xilinx_axidma_desc_hw *hw;
-
- if (!is_slave_direction(xt->dir))
- return NULL;
-
- if (!xt->numf || !xt->sgl[0].size)
- return NULL;
-
- if (xt->frame_size != 1)
- return NULL;
-
- /* Allocate a transaction descriptor. */
- desc = xilinx_dma_alloc_tx_descriptor(chan);
- if (!desc)
- return NULL;
-
- chan->direction = xt->dir;
- dma_async_tx_descriptor_init(&desc->async_tx, &chan->common);
- desc->async_tx.tx_submit = xilinx_dma_tx_submit;
-
- /* Get a free segment */
- segment = xilinx_axidma_alloc_tx_segment(chan);
- if (!segment)
- goto error;
-
- hw = &segment->hw;
-
- /* Fill in the descriptor */
- if (xt->dir != DMA_MEM_TO_DEV)
- hw->buf_addr = xt->dst_start;
- else
- hw->buf_addr = xt->src_start;
-
- hw->mcdma_control = chan->tdest & XILINX_DMA_BD_TDEST_MASK;
- hw->vsize_stride = (xt->numf << XILINX_DMA_BD_VSIZE_SHIFT) &
- XILINX_DMA_BD_VSIZE_MASK;
- hw->vsize_stride |= (xt->sgl[0].icg + xt->sgl[0].size) &
- XILINX_DMA_BD_STRIDE_MASK;
- hw->control = xt->sgl[0].size & XILINX_DMA_BD_HSIZE_MASK;
-
- /*
- * Insert the segment into the descriptor segments
- * list.
- */
- list_add_tail(&segment->node, &desc->segments);
-
-
- segment = list_first_entry(&desc->segments,
- struct xilinx_axidma_tx_segment, node);
- desc->async_tx.phys = segment->phys;
-
- /* For the last DMA_MEM_TO_DEV transfer, set EOP */
- if (xt->dir == DMA_MEM_TO_DEV) {
- segment->hw.control |= XILINX_DMA_BD_SOP;
- segment = list_last_entry(&desc->segments,
- struct xilinx_axidma_tx_segment,
- node);
- segment->hw.control |= XILINX_DMA_BD_EOP;
- }
-
- return &desc->async_tx;
-
-error:
- xilinx_dma_free_tx_descriptor(chan, desc);
- return NULL;
-}
-
-/**
* xilinx_dma_terminate_all - Halt the channel and free descriptors
* @dchan: Driver specific DMA Channel pointer
*
@@ -2492,7 +2362,6 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
of_device_is_compatible(node, "xlnx,axi-cdma-channel")) {
chan->direction = DMA_MEM_TO_DEV;
chan->id = chan_id;
- chan->tdest = chan_id;
chan->ctrl_offset = XILINX_DMA_MM2S_CTRL_OFFSET;
if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
@@ -2509,7 +2378,6 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
"xlnx,axi-dma-s2mm-channel")) {
chan->direction = DMA_DEV_TO_MEM;
chan->id = chan_id;
- chan->tdest = chan_id - xdev->nr_channels;
chan->has_vflip = of_property_read_bool(node,
"xlnx,enable-vert-flip");
if (chan->has_vflip) {
@@ -2597,11 +2465,7 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
static int xilinx_dma_child_probe(struct xilinx_dma_device *xdev,
struct device_node *node)
{
- int ret, i, nr_channels = 1;
-
- ret = of_property_read_u32(node, "dma-channels", &nr_channels);
- if ((ret < 0) && xdev->mcdma)
- dev_warn(xdev->dev, "missing dma-channels property\n");
+ int i, nr_channels = 1;
for (i = 0; i < nr_channels; i++)
xilinx_dma_chan_probe(xdev, node, xdev->chan_id++);
@@ -2700,7 +2564,6 @@ static int xilinx_dma_probe(struct platform_device *pdev)
xdev->max_buffer_len = GENMASK(XILINX_DMA_MAX_TRANS_LEN_MAX - 1, 0);
if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
- xdev->mcdma = of_property_read_bool(node, "xlnx,mcdma");
if (!of_property_read_u32(node, "xlnx,sg-length-width",
&len_width)) {
if (len_width < XILINX_DMA_MAX_TRANS_LEN_MIN ||
@@ -2765,8 +2628,6 @@ static int xilinx_dma_probe(struct platform_device *pdev)
xdev->common.device_prep_slave_sg = xilinx_dma_prep_slave_sg;
xdev->common.device_prep_dma_cyclic =
xilinx_dma_prep_dma_cyclic;
- xdev->common.device_prep_interleaved_dma =
- xilinx_dma_prep_interleaved;
/* Residue calculation is supported by only AXI DMA and CDMA */
xdev->common.residue_granularity =
DMA_RESIDUE_GRANULARITY_SEGMENT;
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-17 07:34:03 +0000