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Subject[PATCH 6/7] habanalabs: add hard reset timeout for PLDM
Date
From: Omer Shpigelman <oshpigelman@habana.ai>

Hard reset flow on PLDM might take more than 2 minutes.
Hence add a dedicated hard reset timeout of 6 minutes for PLDM.

Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
drivers/misc/habanalabs/common/device.c | 9 +++++++--
drivers/misc/habanalabs/common/habanalabs.h | 1 +
2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 46fcab1bf873..cbdf75b24cb4 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1501,6 +1501,7 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
void hl_device_fini(struct hl_device *hdev)
{
ktime_t timeout;
+ u64 reset_sec;
int i, rc;

dev_info(hdev->dev, "Removing device\n");
@@ -1508,6 +1509,11 @@ void hl_device_fini(struct hl_device *hdev)
hdev->device_fini_pending = 1;
flush_delayed_work(&hdev->device_reset_work.reset_work);

+ if (hdev->pldm)
+ reset_sec = HL_PLDM_HARD_RESET_MAX_TIMEOUT;
+ else
+ reset_sec = HL_HARD_RESET_MAX_TIMEOUT;
+
/*
* This function is competing with the reset function, so try to
* take the reset atomic and if we are already in middle of reset,
@@ -1516,8 +1522,7 @@ void hl_device_fini(struct hl_device *hdev)
* ports, the hard reset could take between 10-30 seconds
*/

- timeout = ktime_add_us(ktime_get(),
- HL_HARD_RESET_MAX_TIMEOUT * 1000 * 1000);
+ timeout = ktime_add_us(ktime_get(), reset_sec * 1000 * 1000);
rc = atomic_cmpxchg(&hdev->in_reset, 0, 1);
while (rc) {
usleep_range(50, 200);
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index bc5a1b45270f..244fbf209d34 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -48,6 +48,7 @@
#define HL_PENDING_RESET_LONG_SEC 60

#define HL_HARD_RESET_MAX_TIMEOUT 120
+#define HL_PLDM_HARD_RESET_MAX_TIMEOUT (HL_HARD_RESET_MAX_TIMEOUT * 3)

#define HL_DEVICE_TIMEOUT_USEC 1000000 /* 1 s */

--
2.25.1
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