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-rw-r--r--drivers/misc/mic/host/mic_device.h3
-rw-r--r--drivers/misc/mic/host/mic_main.c2
-rw-r--r--drivers/misc/mic/host/mic_virtio.c2
-rw-r--r--drivers/misc/mic/host/mic_x100.c36
4 files changed, 25 insertions, 18 deletions
diff --git a/drivers/misc/mic/host/mic_device.h b/drivers/misc/mic/host/mic_device.h
index 3574cc375bb..b2da289320c 100644
--- a/drivers/misc/mic/host/mic_device.h
+++ b/drivers/misc/mic/host/mic_device.h
@@ -134,6 +134,8 @@ struct mic_device {
* @send_intr: Send an interrupt for a particular doorbell on the card.
* @ack_interrupt: Hardware specific operations to ack the h/w on
* receipt of an interrupt.
+ * @intr_workarounds: Hardware specific workarounds needed after
+ * handling an interrupt.
* @reset: Reset the remote processor.
* @reset_fw_ready: Reset firmware ready field.
* @is_fw_ready: Check if firmware is ready for OS download.
@@ -149,6 +151,7 @@ struct mic_hw_ops {
void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
void (*send_intr)(struct mic_device *mdev, int doorbell);
u32 (*ack_interrupt)(struct mic_device *mdev);
+ void (*intr_workarounds)(struct mic_device *mdev);
void (*reset)(struct mic_device *mdev);
void (*reset_fw_ready)(struct mic_device *mdev);
bool (*is_fw_ready)(struct mic_device *mdev);
diff --git a/drivers/misc/mic/host/mic_main.c b/drivers/misc/mic/host/mic_main.c
index ad838c7651c..c04a021e20c 100644
--- a/drivers/misc/mic/host/mic_main.c
+++ b/drivers/misc/mic/host/mic_main.c
@@ -115,7 +115,7 @@ static irqreturn_t mic_shutdown_db(int irq, void *data)
struct mic_device *mdev = data;
struct mic_bootparam *bootparam = mdev->dp;
- mdev->ops->ack_interrupt(mdev);
+ mdev->ops->intr_workarounds(mdev);
switch (bootparam->shutdown_status) {
case MIC_HALTED:
diff --git a/drivers/misc/mic/host/mic_virtio.c b/drivers/misc/mic/host/mic_virtio.c
index 5b8494bd1e0..8d3c21cd1d9 100644
--- a/drivers/misc/mic/host/mic_virtio.c
+++ b/drivers/misc/mic/host/mic_virtio.c
@@ -369,7 +369,7 @@ static irqreturn_t mic_virtio_intr_handler(int irq, void *data)
struct mic_vdev *mvdev = data;
struct mic_device *mdev = mvdev->mdev;
- mdev->ops->ack_interrupt(mdev);
+ mdev->ops->intr_workarounds(mdev);
schedule_work(&mvdev->virtio_bh_work);
return IRQ_HANDLED;
}
diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c
index 81e9541b784..6fccb13493a 100644
--- a/drivers/misc/mic/host/mic_x100.c
+++ b/drivers/misc/mic/host/mic_x100.c
@@ -174,35 +174,38 @@ static void mic_x100_send_intr(struct mic_device *mdev, int doorbell)
}
/**
- * mic_ack_interrupt - Device specific interrupt handling.
- * @mdev: pointer to mic_device instance
+ * mic_x100_ack_interrupt - Read the interrupt sources register and
+ * clear it. This function will be called in the MSI/INTx case.
+ * @mdev: Pointer to mic_device instance.
*
- * Returns: bitmask of doorbell events triggered.
+ * Returns: bitmask of interrupt sources triggered.
*/
static u32 mic_x100_ack_interrupt(struct mic_device *mdev)
{
- u32 reg = 0;
- struct mic_mw *mw = &mdev->mmio;
u32 sicr0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICR0;
+ u32 reg = mic_mmio_read(&mdev->mmio, sicr0);
+ mic_mmio_write(&mdev->mmio, reg, sicr0);
+ return reg;
+}
+
+/**
+ * mic_x100_intr_workarounds - These hardware specific workarounds are
+ * to be invoked everytime an interrupt is handled.
+ * @mdev: Pointer to mic_device instance.
+ *
+ * Returns: none
+ */
+static void mic_x100_intr_workarounds(struct mic_device *mdev)
+{
+ struct mic_mw *mw = &mdev->mmio;
/* Clear pending bit array. */
if (MIC_A0_STEP == mdev->stepping)
mic_mmio_write(mw, 1, MIC_X100_SBOX_BASE_ADDRESS +
MIC_X100_SBOX_MSIXPBACR);
- if (mdev->irq_info.num_vectors <= 1) {
- reg = mic_mmio_read(mw, sicr0);
-
- if (unlikely(!reg))
- goto done;
-
- mic_mmio_write(mw, reg, sicr0);
- }
-
if (mdev->stepping >= MIC_B0_STEP)
mdev->intr_ops->enable_interrupts(mdev);
-done:
- return reg;
}
/**
@@ -553,6 +556,7 @@ struct mic_hw_ops mic_x100_ops = {
.write_spad = mic_x100_write_spad,
.send_intr = mic_x100_send_intr,
.ack_interrupt = mic_x100_ack_interrupt,
+ .intr_workarounds = mic_x100_intr_workarounds,
.reset = mic_x100_hw_reset,
.reset_fw_ready = mic_x100_reset_fw_ready,
.is_fw_ready = mic_x100_is_fw_ready,