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habanalabs: simplify wait for interrupt with timestamp flow 

Remove the flag that determines whether to take a timestamp once the
interrupt arrives.
Instead, always take the timestamp once per interrupt.
This is a must for the user-space to measure its graph operations
to evaluate the graph computation time.

Signed-off-by: Yuri Nudelman <ynudelman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Yuri Nudelman 2021-10-06 11:58:02 +03:00 committed by Oded Gabbay
parent 4a18dde5e4
commit d2f5684b8f
3 changed files with 7 additions and 10 deletions
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11
drivers/misc/habanalabs/common/command_submission.c
View File

@ -2768,7 +2768,7 @@ static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
u32 timeout_us, u64 user_address,
u64 target_value, u16 interrupt_offset,
enum hl_cs_wait_status *status,
bool take_timestamp, u64 *timestamp)
u64 *timestamp)
{
struct hl_user_pending_interrupt *pend;
struct hl_user_interrupt *interrupt;
@ -2792,8 +2792,6 @@ static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
hl_fence_init(&pend->fence, ULONG_MAX);
pend->fence.take_timestamp = take_timestamp;
if (interrupt_offset == HL_COMMON_USER_INTERRUPT_ID)
interrupt = &hdev->common_user_interrupt;
else
@ -2815,9 +2813,11 @@ static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
goto remove_pending_user_interrupt;
}
if (completion_value >= target_value)
if (completion_value >= target_value) {
*status = CS_WAIT_STATUS_COMPLETED;
else
/* There was no interrupt, we assume the completion is now. */
pend->fence.timestamp = ktime_get();
} else
*status = CS_WAIT_STATUS_BUSY;
if (!timeout_us || (*status == CS_WAIT_STATUS_COMPLETED))
@ -2914,7 +2914,6 @@ static int hl_interrupt_wait_ioctl(struct hl_fpriv *hpriv, void *data)
rc = _hl_interrupt_wait_ioctl(hdev, hpriv->ctx,
args->in.interrupt_timeout_us, args->in.addr,
args->in.target, interrupt_offset, &status,
args->in.flags & HL_CS_FLAGS_TIMESTAMP,
&timestamp);
if (rc) {

2
drivers/misc/habanalabs/common/habanalabs.h
View File

@ -615,7 +615,6 @@ struct asic_fixed_properties {
* masters QIDs that multi cs is waiting on
* @error: mark this fence with error
* @timestamp: timestamp upon completion
* @take_timestamp: timestamp shall be taken upon completion
* @mcs_handling_done: indicates that corresponding command submission has
* finished msc handling, this does not mean it was part
* of the mcs
@ -627,7 +626,6 @@ struct hl_fence {
u32 stream_master_qid_map;
int error;
ktime_t timestamp;
u8 take_timestamp;
u8 mcs_handling_done;
};

4
drivers/misc/habanalabs/common/irq.c
View File

@ -141,11 +141,11 @@ static void handle_user_cq(struct hl_device *hdev,
struct hl_user_interrupt *user_cq)
{
struct hl_user_pending_interrupt *pend;
ktime_t now = ktime_get();
spin_lock(&user_cq->wait_list_lock);
list_for_each_entry(pend, &user_cq->wait_list_head, wait_list_node) {
if (pend->fence.take_timestamp)
pend->fence.timestamp = ktime_get();
pend->fence.timestamp = now;
complete_all(&pend->fence.completion);
}
spin_unlock(&user_cq->wait_list_lock);