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-rw-r--r--Documentation/devicetree/bindings/dma/mv-xor.txt5
-rw-r--r--drivers/dma/Kconfig2
-rw-r--r--drivers/dma/mv_xor.c98
-rw-r--r--drivers/dma/mv_xor.h1
4 files changed, 84 insertions, 22 deletions
diff --git a/Documentation/devicetree/bindings/dma/mv-xor.txt b/Documentation/devicetree/bindings/dma/mv-xor.txt
index 276ef815ef32..c075f5988135 100644
--- a/Documentation/devicetree/bindings/dma/mv-xor.txt
+++ b/Documentation/devicetree/bindings/dma/mv-xor.txt
@@ -1,7 +1,10 @@
* Marvell XOR engines
Required properties:
-- compatible: Should be "marvell,orion-xor" or "marvell,armada-380-xor"
+- compatible: Should be one of the following:
+ - "marvell,orion-xor"
+ - "marvell,armada-380-xor"
+ - "marvell,armada-3700-xor".
- reg: Should contain registers location and length (two sets)
the first set is the low registers, the second set the high
registers for the XOR engine.
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index d96d87c56f2e..67b37ce94143 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -332,7 +332,7 @@ config MPC512X_DMA
config MV_XOR
bool "Marvell XOR engine support"
- depends on PLAT_ORION
+ depends on PLAT_ORION || ARCH_MVEBU || COMPILE_TEST
select DMA_ENGINE
select DMA_ENGINE_RAID
select ASYNC_TX_ENABLE_CHANNEL_SWITCH
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 3922a5d56806..25d1dadcddd1 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -31,6 +31,12 @@
#include "dmaengine.h"
#include "mv_xor.h"
+enum mv_xor_type {
+ XOR_ORION,
+ XOR_ARMADA_38X,
+ XOR_ARMADA_37XX,
+};
+
enum mv_xor_mode {
XOR_MODE_IN_REG,
XOR_MODE_IN_DESC,
@@ -477,7 +483,7 @@ mv_xor_prep_dma_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
BUG_ON(len > MV_XOR_MAX_BYTE_COUNT);
dev_dbg(mv_chan_to_devp(mv_chan),
- "%s src_cnt: %d len: %u dest %pad flags: %ld\n",
+ "%s src_cnt: %d len: %zu dest %pad flags: %ld\n",
__func__, src_cnt, len, &dest, flags);
sw_desc = mv_chan_alloc_slot(mv_chan);
@@ -933,7 +939,7 @@ 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 op_in_desc)
+ int idx, dma_cap_mask_t cap_mask, int irq)
{
int ret = 0;
struct mv_xor_chan *mv_chan;
@@ -945,7 +951,10 @@ 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;
+ if (xordev->xor_type == XOR_ORION)
+ mv_chan->op_in_desc = XOR_MODE_IN_REG;
+ else
+ mv_chan->op_in_desc = XOR_MODE_IN_DESC;
dma_dev = &mv_chan->dmadev;
@@ -1085,6 +1094,33 @@ mv_xor_conf_mbus_windows(struct mv_xor_device *xordev,
writel(0, base + WINDOW_OVERRIDE_CTRL(1));
}
+static void
+mv_xor_conf_mbus_windows_a3700(struct mv_xor_device *xordev)
+{
+ void __iomem *base = xordev->xor_high_base;
+ u32 win_enable = 0;
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ writel(0, base + WINDOW_BASE(i));
+ writel(0, base + WINDOW_SIZE(i));
+ if (i < 4)
+ writel(0, base + WINDOW_REMAP_HIGH(i));
+ }
+ /*
+ * For Armada3700 open default 4GB Mbus window. The dram
+ * related configuration are done at AXIS level.
+ */
+ writel(0xffff0000, base + WINDOW_SIZE(0));
+ win_enable |= 1;
+ win_enable |= 3 << 16;
+
+ writel(win_enable, base + WINDOW_BAR_ENABLE(0));
+ writel(win_enable, base + WINDOW_BAR_ENABLE(1));
+ writel(0, base + WINDOW_OVERRIDE_CTRL(0));
+ writel(0, base + WINDOW_OVERRIDE_CTRL(1));
+}
+
/*
* Since this XOR driver is basically used only for RAID5, we don't
* need to care about synchronizing ->suspend with DMA activity,
@@ -1129,6 +1165,11 @@ static int mv_xor_resume(struct platform_device *dev)
XOR_INTR_MASK(mv_chan));
}
+ if (xordev->xor_type == XOR_ARMADA_37XX) {
+ mv_xor_conf_mbus_windows_a3700(xordev);
+ return 0;
+ }
+
dram = mv_mbus_dram_info();
if (dram)
mv_xor_conf_mbus_windows(xordev, dram);
@@ -1137,8 +1178,9 @@ static int mv_xor_resume(struct platform_device *dev)
}
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 },
+ { .compatible = "marvell,orion-xor", .data = (void *)XOR_ORION },
+ { .compatible = "marvell,armada-380-xor", .data = (void *)XOR_ARMADA_38X },
+ { .compatible = "marvell,armada-3700-xor", .data = (void *)XOR_ARMADA_37XX },
{},
};
@@ -1152,7 +1194,6 @@ static int mv_xor_probe(struct platform_device *pdev)
struct resource *res;
unsigned int max_engines, max_channels;
int i, ret;
- int op_in_desc;
dev_notice(&pdev->dev, "Marvell shared XOR driver\n");
@@ -1180,12 +1221,30 @@ static int mv_xor_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, xordev);
+
+ /*
+ * We need to know which type of XOR device we use before
+ * setting up. In non-dt case it can only be the legacy one.
+ */
+ xordev->xor_type = XOR_ORION;
+ if (pdev->dev.of_node) {
+ const struct of_device_id *of_id =
+ of_match_device(mv_xor_dt_ids,
+ &pdev->dev);
+
+ xordev->xor_type = (uintptr_t)of_id->data;
+ }
+
/*
* (Re-)program MBUS remapping windows if we are asked to.
*/
- dram = mv_mbus_dram_info();
- if (dram)
- mv_xor_conf_mbus_windows(xordev, dram);
+ if (xordev->xor_type == XOR_ARMADA_37XX) {
+ mv_xor_conf_mbus_windows_a3700(xordev);
+ } else {
+ dram = mv_mbus_dram_info();
+ if (dram)
+ mv_xor_conf_mbus_windows(xordev, dram);
+ }
/* Not all platforms can gate the clock, so it is not
* an error if the clock does not exists.
@@ -1199,12 +1258,16 @@ static int mv_xor_probe(struct platform_device *pdev)
* order for async_tx to perform well. So we limit the number
* of engines and channels so that we take into account this
* constraint. Note that we also want to use channels from
- * separate engines when possible.
+ * separate engines when possible. For dual-CPU Armada 3700
+ * SoC with single XOR engine allow using its both channels.
*/
max_engines = num_present_cpus();
- max_channels = min_t(unsigned int,
- MV_XOR_MAX_CHANNELS,
- DIV_ROUND_UP(num_present_cpus(), 2));
+ if (xordev->xor_type == XOR_ARMADA_37XX)
+ max_channels = num_present_cpus();
+ else
+ max_channels = min_t(unsigned int,
+ MV_XOR_MAX_CHANNELS,
+ DIV_ROUND_UP(num_present_cpus(), 2));
if (mv_xor_engine_count >= max_engines)
return 0;
@@ -1212,15 +1275,11 @@ 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;
if (i >= max_channels)
continue;
@@ -1237,7 +1296,7 @@ static int mv_xor_probe(struct platform_device *pdev)
}
chan = mv_xor_channel_add(xordev, pdev, i,
- cap_mask, irq, op_in_desc);
+ cap_mask, irq);
if (IS_ERR(chan)) {
ret = PTR_ERR(chan);
irq_dispose_mapping(irq);
@@ -1266,8 +1325,7 @@ static int mv_xor_probe(struct platform_device *pdev)
}
chan = mv_xor_channel_add(xordev, pdev, i,
- cd->cap_mask, irq,
- XOR_MODE_IN_REG);
+ cd->cap_mask, irq);
if (IS_ERR(chan)) {
ret = PTR_ERR(chan);
goto err_channel_add;
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index c19fe30e5ae9..bf56e082e7cd 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -85,6 +85,7 @@ struct mv_xor_device {
void __iomem *xor_high_base;
struct clk *clk;
struct mv_xor_chan *channels[MV_XOR_MAX_CHANNELS];
+ int xor_type;
};
/**
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-07 02:33:48 +0300