diff options
| author | Tal Cohen <talcohen@habana.ai> | 2022-04-28 13:45:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-22 22:01:20 +0300 |
| commit | 422ef171038d4855ffe938137039a8f3b3e84293 (patch) | |
| tree | a061758a6048e6ed4eda70d954dd8a8a34293b6f /include/uapi | |
| parent | f2daa2d97ec16766bc36fc2b6218d0acb47885ed (diff) | |
| download | linux-422ef171038d4855ffe938137039a8f3b3e84293.tar.xz | |
habanalabs: add support for notification via eventfd
The driver will be able to send notification events towards
a user process, using user's registered event file descriptor.
The driver uses the notification mechanism to inform the
user about an occurred event.
A user thread can wait until a notification is received from
the driver.
The driver stores the occurred event until the user reads it,
using HL_INFO_GET_EVENTS - new ioctl opcode in the INFO ioctl.
Gaudi specific implementation includes sending a notification
on a TPC assertion event that is received from f/w.
Signed-off-by: Tal Cohen <talcohen@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/misc/habanalabs.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h index 3576bf2b4841..52540d5b4fc9 100644 --- a/include/uapi/misc/habanalabs.h +++ b/include/uapi/misc/habanalabs.h @@ -349,6 +349,9 @@ enum hl_server_type { * Razwi initiator. * Razwi cause, was it a page fault or MMU access error. * HL_INFO_DEV_MEM_ALLOC_PAGE_SIZES - Retrieve valid page sizes for device memory allocation + * HL_INFO_REGISTER_EVENTFD - Register eventfd for event notifications. + * HL_INFO_UNREGISTER_EVENTFD - Unregister eventfd + * HL_INFO_GET_EVENTS - Retrieve the last occurred events */ #define HL_INFO_HW_IP_INFO 0 #define HL_INFO_HW_EVENTS 1 @@ -374,6 +377,9 @@ enum hl_server_type { #define HL_INFO_CS_TIMEOUT_EVENT 24 #define HL_INFO_RAZWI_EVENT 25 #define HL_INFO_DEV_MEM_ALLOC_PAGE_SIZES 26 +#define HL_INFO_REGISTER_EVENTFD 28 +#define HL_INFO_UNREGISTER_EVENTFD 29 +#define HL_INFO_GET_EVENTS 30 #define HL_INFO_VERSION_MAX_LEN 128 #define HL_INFO_CARD_NAME_MAX_LEN 16 @@ -679,6 +685,7 @@ enum gaudi_dcores { * @period_ms: Period value, in milliseconds, for utilization rate in range 100ms - 1000ms in 100 ms * resolution. Currently not in use. * @pll_index: Index as defined in hl_<asic type>_pll_index enumeration. + * @eventfd: event file descriptor for event notifications. * @pad: Padding to 64 bit. */ struct hl_info_args { @@ -691,6 +698,7 @@ struct hl_info_args { __u32 ctx_id; __u32 period_ms; __u32 pll_index; + __u32 eventfd; }; __u32 pad; @@ -1391,6 +1399,13 @@ struct hl_debug_args { }; /* + * Notifier event values - for the notification mechanism and the HL_INFO_GET_EVENTS command + * + * HL_NOTIFIER_EVENT_TPC_ASSERT - Indicates TPC assert event + */ +#define HL_NOTIFIER_EVENT_TPC_ASSERT (1 << 0) + +/* * Various information operations such as: * - H/W IP information * - Current dram usage |