Commit 88d97ea8 authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

dmaengine: idxd: add halt interrupt support 



Add halt interrupt support. Given that the misc interrupt handler already
check halt state, the driver just need to run the halt handling code when
receiving the halt interrupt.

Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163114224352.846654.14334468363464318828.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 5b5b5aa5

drivers/dma/idxd/irq.c

+5 −0
Original line number Diff line number Diff line
@@ -63,6 +63,9 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause) 
	int i;

	bool err = false;



	if (cause & IDXD_INTC_HALT_STATE)

		goto halt;



	if (cause & IDXD_INTC_ERR) {

		spin_lock(&idxd->dev_lock);

		for (i = 0; i < 4; i++)
@@ -121,6 +124,7 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause) 
	if (!err)

		return 0;



halt:

	gensts.bits = ioread32(idxd->reg_base + IDXD_GENSTATS_OFFSET);

	if (gensts.state == IDXD_DEVICE_STATE_HALT) {

		idxd->state = IDXD_DEV_HALTED;
@@ -134,6 +138,7 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause) 
			queue_work(idxd->wq, &idxd->work);

		} else {

			spin_lock(&idxd->dev_lock);

			idxd->state = IDXD_DEV_HALTED;

			idxd_wqs_quiesce(idxd);

			idxd_wqs_unmap_portal(idxd);

			idxd_device_clear_state(idxd);

drivers/dma/idxd/registers.h

+1 −0
Original line number Diff line number Diff line
@@ -157,6 +157,7 @@ enum idxd_device_reset_type { 
#define IDXD_INTC_CMD			0x02

#define IDXD_INTC_OCCUPY			0x04

#define IDXD_INTC_PERFMON_OVFL		0x08

#define IDXD_INTC_HALT_STATE		0x10



#define IDXD_CMD_OFFSET			0xa0

union idxd_command_reg {