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habanalabs: Timestamps buffers registration

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Timestamp registration API allows the user to register
a timestamp record event which will make the driver set
timestamp when CQ counter reaches the target value
and write it to a specific location specified
by the user.
This is a non blocking API, unlike the wait_for_interrupt
which is a blocking one.

Signed-off-by: farah kassabri <fkassabri@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
farah kassabri
2021-12-23 13:24:34 +02:00
committed by Oded Gabbay
parent b32cd10480
commit 9158bf69e7
7 changed files with 691 additions and 59 deletions
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include/uapi/misc/habanalabs.h
+35 -2
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@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
*
* Copyright 2016-2020 HabanaLabs, Ltd.
* Copyright 2016-2021 HabanaLabs, Ltd.
* All Rights Reserved.
*
*/
@@ -30,6 +30,9 @@
*/
#define GAUDI_FIRST_AVAILABLE_W_S_MONITOR 72
/* Max number of elements in timestamps registration buffers */
#define TS_MAX_ELEMENTS_NUM (1 << 20) /* 1MB */
/*
* Goya queue Numbering
*
@@ -695,10 +698,12 @@ struct hl_cb_in {
__u64 cb_handle;
/* HL_CB_OP_* */
__u32 op;
/* Size of CB. Maximum size is HL_MAX_CB_SIZE. The minimum size that
* will be allocated, regardless of this parameter's value, is PAGE_SIZE
*/
__u32 cb_size;
/* Context ID - Currently not in use */
__u32 ctx_id;
/* HL_CB_FLAGS_* */
@@ -964,6 +969,7 @@ union hl_cs_args {
#define HL_WAIT_CS_FLAGS_INTERRUPT_MASK 0xFFF00000
#define HL_WAIT_CS_FLAGS_MULTI_CS 0x4
#define HL_WAIT_CS_FLAGS_INTERRUPT_KERNEL_CQ 0x10
#define HL_WAIT_CS_FLAGS_REGISTER_INTERRUPT 0x20
#define HL_WAIT_MULTI_CS_LIST_MAX_LEN 32
@@ -1036,6 +1042,20 @@ struct hl_wait_cs_in {
* relevant only when HL_WAIT_CS_FLAGS_INTERRUPT_KERNEL_CQ is set
*/
__u64 cq_counters_offset;
/*
* Timestamp_handle timestamps buffer handle.
* relevant only when HL_WAIT_CS_FLAGS_REGISTER_INTERRUPT is set
*/
__u64 timestamp_handle;
/*
* Timestamp_offset is offset inside the timestamp buffer pointed by timestamp_handle above.
* upon interrupt, if the cq reached the target value then driver will write
* timestamp to this offset.
* relevant only when HL_WAIT_CS_FLAGS_REGISTER_INTERRUPT is set
*/
__u64 timestamp_offset;
};
#define HL_WAIT_CS_STATUS_COMPLETED 0
@@ -1082,6 +1102,14 @@ union hl_wait_cs_args {
*/
#define HL_MEM_OP_EXPORT_DMABUF_FD 5
/* Opcode to create timestamps pool for user interrupts registration support
* The memory will be allocated by the kernel driver, A timestamp buffer which the user
* will get handle to it for mmap, and another internal buffer used by the
* driver for registration management
* The memory will be freed when the user closes the file descriptor(ctx close)
*/
#define HL_MEM_OP_TS_ALLOC 6
/* Memory flags */
#define HL_MEM_CONTIGUOUS 0x1
#define HL_MEM_SHARED 0x2
@@ -1173,9 +1201,14 @@ struct hl_mem_in {
* DMA-BUF file/FD flags.
*/
__u32 flags;
/* Context ID - Currently not in use */
__u32 ctx_id;
__u32 pad;
/* number of timestamp elements
* used only when HL_MEM_OP_TS_ALLOC opcode
*/
__u32 num_of_elements;
};
struct hl_mem_out {