diff options
| author | Dave Jiang | 2021-09-08 16:04:03 -0700 |
|---|---|---|
| committer | Vinod Koul | 2021-10-25 12:09:15 +0530 |
| commit | 88d97ea82cbe352851a8654ee952d3a694c8c2c6 (patch) | |
| tree | 1eb81feaa646a58b6df8eae44952bde735afa56a /drivers/dma/idxd | |
| parent | 5b5b5aa50d1b90392f13afd15089e191d57316f5 (diff) | |
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: 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>
Diffstat (limited to 'drivers/dma/idxd')
| -rw-r--r-- | drivers/dma/idxd/irq.c | 5 | ||||
| -rw-r--r-- | drivers/dma/idxd/registers.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c index 79fcfc4883e4..17f2f8a31b63 100644 --- a/drivers/dma/idxd/irq.c +++ b/drivers/dma/idxd/irq.c @@ -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); diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h index eeb11e6eb25b..262c8220adbd 100644 --- a/drivers/dma/idxd/registers.h +++ b/drivers/dma/idxd/registers.h @@ -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 { |