Merge branch 'topic/idma' into for-linus
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 6a388a7..e6cd1a3 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -229,7 +229,7 @@
Support the i.MX SDMA engine. This engine is integrated into
Freescale i.MX25/31/35/51/53/6 chips.
-config IDMA64
+config INTEL_IDMA64
tristate "Intel integrated DMA 64-bit support"
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 7711a71..ef9c099 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -34,7 +34,7 @@
obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o
obj-$(CONFIG_IMX_DMA) += imx-dma.o
obj-$(CONFIG_IMX_SDMA) += imx-sdma.o
-obj-$(CONFIG_IDMA64) += idma64.o
+obj-$(CONFIG_INTEL_IDMA64) += idma64.o
obj-$(CONFIG_INTEL_IOATDMA) += ioat/
obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
obj-$(CONFIG_INTEL_MIC_X100_DMA) += mic_x100_dma.o
diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
index 18c14e1..39e6ab1 100644
--- a/drivers/dma/idma64.c
+++ b/drivers/dma/idma64.c
@@ -65,9 +65,6 @@
u32 cfghi = IDMA64C_CFGH_SRC_PER(1) | IDMA64C_CFGH_DST_PER(0);
u32 cfglo = 0;
- /* Enforce FIFO drain when channel is suspended */
- cfglo |= IDMA64C_CFGL_CH_DRAIN;
-
/* Set default burst alignment */
cfglo |= IDMA64C_CFGL_DST_BURST_ALIGN | IDMA64C_CFGL_SRC_BURST_ALIGN;
@@ -257,15 +254,15 @@
dar = config->dst_addr;
ctllo |= IDMA64C_CTLL_DST_FIX | IDMA64C_CTLL_SRC_INC |
IDMA64C_CTLL_FC_M2P;
- src_width = min_t(u32, 2, __fls(sar | hw->len));
- dst_width = __fls(config->dst_addr_width);
+ src_width = __ffs(sar | hw->len | 4);
+ dst_width = __ffs(config->dst_addr_width);
} else { /* DMA_DEV_TO_MEM */
sar = config->src_addr;
dar = hw->phys;
ctllo |= IDMA64C_CTLL_DST_INC | IDMA64C_CTLL_SRC_FIX |
IDMA64C_CTLL_FC_P2M;
- src_width = __fls(config->src_addr_width);
- dst_width = min_t(u32, 2, __fls(dar | hw->len));
+ src_width = __ffs(config->src_addr_width);
+ dst_width = __ffs(dar | hw->len | 4);
}
lli->sar = sar;
@@ -428,12 +425,17 @@
return 0;
}
-static void idma64_chan_deactivate(struct idma64_chan *idma64c)
+static void idma64_chan_deactivate(struct idma64_chan *idma64c, bool drain)
{
unsigned short count = 100;
u32 cfglo;
cfglo = channel_readl(idma64c, CFG_LO);
+ if (drain)
+ cfglo |= IDMA64C_CFGL_CH_DRAIN;
+ else
+ cfglo &= ~IDMA64C_CFGL_CH_DRAIN;
+
channel_writel(idma64c, CFG_LO, cfglo | IDMA64C_CFGL_CH_SUSP);
do {
udelay(1);
@@ -456,7 +458,7 @@
spin_lock_irqsave(&idma64c->vchan.lock, flags);
if (idma64c->desc && idma64c->desc->status == DMA_IN_PROGRESS) {
- idma64_chan_deactivate(idma64c);
+ idma64_chan_deactivate(idma64c, false);
idma64c->desc->status = DMA_PAUSED;
}
spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
@@ -486,7 +488,7 @@
LIST_HEAD(head);
spin_lock_irqsave(&idma64c->vchan.lock, flags);
- idma64_chan_deactivate(idma64c);
+ idma64_chan_deactivate(idma64c, true);
idma64_stop_transfer(idma64c);
if (idma64c->desc) {
idma64_vdesc_free(&idma64c->desc->vdesc);
diff --git a/drivers/dma/idma64.h b/drivers/dma/idma64.h
index a4d9968..f6aeff0 100644
--- a/drivers/dma/idma64.h
+++ b/drivers/dma/idma64.h
@@ -16,6 +16,8 @@
#include <linux/spinlock.h>
#include <linux/types.h>
+#include <asm-generic/io-64-nonatomic-lo-hi.h>
+
#include "virt-dma.h"
/* Channel registers */
@@ -166,19 +168,13 @@
static inline u64 idma64c_readq(struct idma64_chan *idma64c, int offset)
{
- u64 l, h;
-
- l = idma64c_readl(idma64c, offset);
- h = idma64c_readl(idma64c, offset + 4);
-
- return l | (h << 32);
+ return lo_hi_readq(idma64c->regs + offset);
}
static inline void idma64c_writeq(struct idma64_chan *idma64c, int offset,
u64 value)
{
- idma64c_writel(idma64c, offset, value);
- idma64c_writel(idma64c, offset + 4, value >> 32);
+ lo_hi_writeq(value, idma64c->regs + offset);
}
#define channel_readq(idma64c, reg) \
@@ -217,7 +213,7 @@
idma64_writel(idma64, IDMA64_##reg, (value))
/**
- * struct idma64_chip - representation of DesignWare DMA controller hardware
+ * struct idma64_chip - representation of iDMA 64-bit controller hardware
* @dev: struct device of the DMA controller
* @irq: irq line
* @regs: memory mapped I/O space