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dmaengine: idxd: add halt interrupt support

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[ Upstream commit 88d97ea82c ]

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: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163114224352.846654.14334468363464318828.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dave Jiang
2021-09-08 16:04:03 -07:00
committed by Greg Kroah-Hartman
parent f2aebdaa3d
commit 05d2cc973c
2 changed files with 6 additions and 0 deletions
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5
drivers/dma/idxd/irq.c
View File

@@ -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);

1
drivers/dma/idxd/registers.h
View File

@@ -158,6 +158,7 @@ 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 {