diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-04-07 23:31:31 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-04-12 20:48:45 +0300 |
| commit | 2f431ba908d2ef05da478d10925207728f1ff483 (patch) | |
| tree | 32295e95fc493a45e01d8b81ea388fab8afcb421 /include/uapi/linux | |
| parent | 244da66cda359227d80ccb41dbcb99da40eae186 (diff) | |
| download | linux-2f431ba908d2ef05da478d10925207728f1ff483.tar.xz | |
dmaengine: idxd: add interrupt handling for event log
An event log interrupt is raised in the misc interrupt INTCAUSE register
when an event is written by the hardware. Add basic event log processing
support to the interrupt handler. The event log is a ring where the
hardware owns the tail and the software owns the head. The hardware will
advance the tail index when an additional event has been pushed to memory.
The software will process the log entry and then advances the head. The
log is full when (tail + 1) % log_size = head. The hardware will stop
writing when the log is full. The user is expected to create a log size
large enough to handle all the expected events.
Tested-by: Tony Zhu <tony.zhu@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20230407203143.2189681-5-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/idxd.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h index 5d05bf12f2bd..0bc8eea18586 100644 --- a/include/uapi/linux/idxd.h +++ b/include/uapi/linux/idxd.h @@ -170,6 +170,7 @@ enum iax_completion_status { #define DSA_COMP_STATUS_MASK 0x7f #define DSA_COMP_STATUS_WRITE 0x80 +#define DSA_COMP_STATUS(status) ((status) & DSA_COMP_STATUS_MASK) struct dsa_hw_desc { uint32_t pasid:20; |