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drm/amdkfd: Replace bitmask with event idx in SMI event msg

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Event bitmask is a 64-bit mask with only 1 bit set. Sending this
event bitmask in KFD SMI event message is both wasteful of memory
and potentially limiting to only 64 events. Instead send event
index in SMI event message.
Please note this change does not break the ABI for the two event
types defined so far. The new index is identical to the mask used
before.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Suggested-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mukul Joshi
2020-07-30 18:04:33 -04:00
committed by Alex Deucher
parent 2456c290a7
commit 522ec6e0ee
2 changed files with 20 additions and 14 deletions
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10
include/uapi/linux/kfd_ioctl.h
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@@ -449,9 +449,13 @@ struct kfd_ioctl_import_dmabuf_args {
/*
* KFD SMI(System Management Interface) events
*/
/* Event type (defined by bitmask) */
#define KFD_SMI_EVENT_VMFAULT 0x0000000000000001
#define KFD_SMI_EVENT_THERMAL_THROTTLE 0x0000000000000002
enum kfd_smi_event {
KFD_SMI_EVENT_NONE = 0, /* not used */
KFD_SMI_EVENT_VMFAULT = 1, /* event start counting at 1 */
KFD_SMI_EVENT_THERMAL_THROTTLE = 2,
};
#define KFD_SMI_EVENT_MASK_FROM_INDEX(i) (1ULL << ((i) - 1))
struct kfd_ioctl_smi_events_args {
__u32 gpuid; /* to KFD */