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-rw-r--r--drivers/dma/mv_xor.c82
-rw-r--r--drivers/dma/mv_xor.h7
2 files changed, 75 insertions, 14 deletions
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 51433c4020fe..669d0b5029d1 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -19,6 +19,7 @@
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/memory.h>
#include <linux/clk.h>
@@ -30,6 +31,11 @@
#include "dmaengine.h"
#include "mv_xor.h"
+enum mv_xor_mode {
+ XOR_MODE_IN_REG,
+ XOR_MODE_IN_DESC,
+};
+
static void mv_xor_issue_pending(struct dma_chan *chan);
#define to_mv_xor_chan(chan) \
@@ -56,6 +62,24 @@ static void mv_desc_init(struct mv_xor_desc_slot *desc,
hw_desc->byte_count = byte_count;
}
+static void mv_desc_set_mode(struct mv_xor_desc_slot *desc)
+{
+ struct mv_xor_desc *hw_desc = desc->hw_desc;
+
+ switch (desc->type) {
+ case DMA_XOR:
+ case DMA_INTERRUPT:
+ hw_desc->desc_command |= XOR_DESC_OPERATION_XOR;
+ break;
+ case DMA_MEMCPY:
+ hw_desc->desc_command |= XOR_DESC_OPERATION_MEMCPY;
+ break;
+ default:
+ BUG();
+ return;
+ }
+}
+
static void mv_desc_set_next_desc(struct mv_xor_desc_slot *desc,
u32 next_desc_addr)
{
@@ -144,6 +168,25 @@ static void mv_chan_set_mode(struct mv_xor_chan *chan,
config &= ~0x7;
config |= op_mode;
+ if (IS_ENABLED(__BIG_ENDIAN))
+ config |= XOR_DESCRIPTOR_SWAP;
+ else
+ config &= ~XOR_DESCRIPTOR_SWAP;
+
+ writel_relaxed(config, XOR_CONFIG(chan));
+ chan->current_type = type;
+}
+
+static void mv_chan_set_mode_to_desc(struct mv_xor_chan *chan)
+{
+ u32 op_mode;
+ u32 config = readl_relaxed(XOR_CONFIG(chan));
+
+ op_mode = XOR_OPERATION_MODE_IN_DESC;
+
+ config &= ~0x7;
+ config |= op_mode;
+
#if defined(__BIG_ENDIAN)
config |= XOR_DESCRIPTOR_SWAP;
#else
@@ -151,7 +194,6 @@ static void mv_chan_set_mode(struct mv_xor_chan *chan,
#endif
writel_relaxed(config, XOR_CONFIG(chan));
- chan->current_type = type;
}
static void mv_chan_activate(struct mv_xor_chan *chan)
@@ -530,6 +572,8 @@ mv_xor_prep_dma_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
sw_desc->type = DMA_XOR;
sw_desc->async_tx.flags = flags;
mv_desc_init(sw_desc, dest, len, flags);
+ if (mv_chan->op_in_desc == XOR_MODE_IN_DESC)
+ mv_desc_set_mode(sw_desc);
while (src_cnt--)
mv_desc_set_src_addr(sw_desc, src_cnt, src[src_cnt]);
}
@@ -972,7 +1016,7 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
static struct mv_xor_chan *
mv_xor_channel_add(struct mv_xor_device *xordev,
struct platform_device *pdev,
- int idx, dma_cap_mask_t cap_mask, int irq)
+ int idx, dma_cap_mask_t cap_mask, int irq, int op_in_desc)
{
int ret = 0;
struct mv_xor_chan *mv_chan;
@@ -984,6 +1028,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
mv_chan->idx = idx;
mv_chan->irq = irq;
+ mv_chan->op_in_desc = op_in_desc;
dma_dev = &mv_chan->dmadev;
@@ -1044,7 +1089,10 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
mv_chan_unmask_interrupts(mv_chan);
- mv_chan_set_mode(mv_chan, DMA_XOR);
+ if (mv_chan->op_in_desc == XOR_MODE_IN_DESC)
+ mv_chan_set_mode_to_desc(mv_chan);
+ else
+ mv_chan_set_mode(mv_chan, DMA_XOR);
spin_lock_init(&mv_chan->lock);
INIT_LIST_HEAD(&mv_chan->chain);
@@ -1069,7 +1117,8 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
goto err_free_irq;
}
- dev_info(&pdev->dev, "Marvell XOR: ( %s%s%s)\n",
+ dev_info(&pdev->dev, "Marvell XOR (%s): ( %s%s%s)\n",
+ mv_chan->op_in_desc ? "Descriptor Mode" : "Registers Mode",
dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "xor " : "",
dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "",
dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : "");
@@ -1118,6 +1167,13 @@ mv_xor_conf_mbus_windows(struct mv_xor_device *xordev,
writel(0, base + WINDOW_OVERRIDE_CTRL(1));
}
+static const struct of_device_id mv_xor_dt_ids[] = {
+ { .compatible = "marvell,orion-xor", .data = (void *)XOR_MODE_IN_REG },
+ { .compatible = "marvell,armada-380-xor", .data = (void *)XOR_MODE_IN_DESC },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mv_xor_dt_ids);
+
static int mv_xor_probe(struct platform_device *pdev)
{
const struct mbus_dram_target_info *dram;
@@ -1125,6 +1181,7 @@ static int mv_xor_probe(struct platform_device *pdev)
struct mv_xor_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct resource *res;
int i, ret;
+ int op_in_desc;
dev_notice(&pdev->dev, "Marvell shared XOR driver\n");
@@ -1169,11 +1226,15 @@ static int mv_xor_probe(struct platform_device *pdev)
if (pdev->dev.of_node) {
struct device_node *np;
int i = 0;
+ const struct of_device_id *of_id =
+ of_match_device(mv_xor_dt_ids,
+ &pdev->dev);
for_each_child_of_node(pdev->dev.of_node, np) {
struct mv_xor_chan *chan;
dma_cap_mask_t cap_mask;
int irq;
+ op_in_desc = (int)of_id->data;
dma_cap_zero(cap_mask);
if (of_property_read_bool(np, "dmacap,memcpy"))
@@ -1190,7 +1251,7 @@ static int mv_xor_probe(struct platform_device *pdev)
}
chan = mv_xor_channel_add(xordev, pdev, i,
- cap_mask, irq);
+ cap_mask, irq, op_in_desc);
if (IS_ERR(chan)) {
ret = PTR_ERR(chan);
irq_dispose_mapping(irq);
@@ -1219,7 +1280,8 @@ static int mv_xor_probe(struct platform_device *pdev)
}
chan = mv_xor_channel_add(xordev, pdev, i,
- cd->cap_mask, irq);
+ cd->cap_mask, irq,
+ XOR_MODE_IN_REG);
if (IS_ERR(chan)) {
ret = PTR_ERR(chan);
goto err_channel_add;
@@ -1265,14 +1327,6 @@ static int mv_xor_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_OF
-static const struct of_device_id mv_xor_dt_ids[] = {
- { .compatible = "marvell,orion-xor", },
- {},
-};
-MODULE_DEVICE_TABLE(of, mv_xor_dt_ids);
-#endif
-
static struct platform_driver mv_xor_driver = {
.probe = mv_xor_probe,
.remove = mv_xor_remove,
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index 0e302b3a33ad..ac1ce87935de 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -30,9 +30,14 @@
/* Values for the XOR_CONFIG register */
#define XOR_OPERATION_MODE_XOR 0
#define XOR_OPERATION_MODE_MEMCPY 2
+#define XOR_OPERATION_MODE_IN_DESC 7
#define XOR_DESCRIPTOR_SWAP BIT(14)
#define XOR_DESC_SUCCESS 0x40000000
+#define XOR_DESC_OPERATION_XOR (0 << 24)
+#define XOR_DESC_OPERATION_CRC32C (1 << 24)
+#define XOR_DESC_OPERATION_MEMCPY (2 << 24)
+
#define XOR_DESC_DMA_OWNED BIT(31)
#define XOR_DESC_EOD_INT_EN BIT(31)
@@ -96,6 +101,7 @@ struct mv_xor_device {
* @all_slots: complete domain of slots usable by the channel
* @slots_allocated: records the actual size of the descriptor slot pool
* @irq_tasklet: bottom half where mv_xor_slot_cleanup runs
+ * @op_in_desc: new mode of driver, each op is writen to descriptor.
*/
struct mv_xor_chan {
int pending;
@@ -116,6 +122,7 @@ struct mv_xor_chan {
struct list_head all_slots;
int slots_allocated;
struct tasklet_struct irq_tasklet;
+ int op_in_desc;
char dummy_src[MV_XOR_MIN_BYTE_COUNT];
char dummy_dst[MV_XOR_MIN_BYTE_COUNT];
dma_addr_t dummy_src_addr, dummy_dst_addr;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-21 03:47:06 +0000