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path: root/drivers/dma/ioat/dma.h
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Diffstat (limited to 'drivers/dma/ioat/dma.h')
-rw-r--r--drivers/dma/ioat/dma.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index 45edde996480..bbc3e78ef333 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -60,6 +60,7 @@
* @dca: direct cache access context
* @intr_quirk: interrupt setup quirk (for ioat_v1 devices)
* @enumerate_channels: hw version specific channel enumeration
+ * @reset_hw: hw version specific channel (re)initialization
* @cleanup_tasklet: select between the v2 and v3 cleanup routines
* @timer_fn: select between the v2 and v3 timer watchdog routines
* @self_test: hardware version specific self test for each supported op type
@@ -78,6 +79,7 @@ struct ioatdma_device {
struct dca_provider *dca;
void (*intr_quirk)(struct ioatdma_device *device);
int (*enumerate_channels)(struct ioatdma_device *device);
+ int (*reset_hw)(struct ioat_chan_common *chan);
void (*cleanup_tasklet)(unsigned long data);
void (*timer_fn)(unsigned long data);
int (*self_test)(struct ioatdma_device *device);
@@ -264,6 +266,22 @@ static inline void ioat_suspend(struct ioat_chan_common *chan)
writeb(IOAT_CHANCMD_SUSPEND, chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
}
+static inline void ioat_reset(struct ioat_chan_common *chan)
+{
+ u8 ver = chan->device->version;
+
+ writeb(IOAT_CHANCMD_RESET, chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
+}
+
+static inline bool ioat_reset_pending(struct ioat_chan_common *chan)
+{
+ u8 ver = chan->device->version;
+ u8 cmd;
+
+ cmd = readb(chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
+ return (cmd & IOAT_CHANCMD_RESET) == IOAT_CHANCMD_RESET;
+}
+
static inline void ioat_set_chainaddr(struct ioat_dma_chan *ioat, u64 addr)
{
struct ioat_chan_common *chan = &ioat->base;