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debugfs: add skip_reset_on_timeout option
To be able to debug long-running CS better, without changing the userspace code, we are adding a new option through debugfs interface to skip the reset of the device in case of CS timeout. Signed-off-by: Yuri Nudelman <ynudelman@habana.ai> Reviewed-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
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@ -207,6 +207,14 @@ Contact: ogabbay@kernel.org
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Description: Sets the PCI power state. Valid values are "1" for D0 and "2"
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for D3Hot
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What: /sys/kernel/debug/habanalabs/hl<n>/skip_reset_on_timeout
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Date: Jun 2021
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KernelVersion: 5.13
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Contact: ynudelman@habana.ai
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Description: Sets the skip reset on timeout option for the device. Value of
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"0" means device will be reset in case some CS has timed out,
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otherwise it will not be reset.
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What: /sys/kernel/debug/habanalabs/hl<n>/stop_on_err
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Date: Mar 2020
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KernelVersion: 5.6
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@ -663,6 +663,7 @@ static int allocate_cs(struct hl_device *hdev, struct hl_ctx *ctx,
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cs->timestamp = !!(flags & HL_CS_FLAGS_TIMESTAMP);
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cs->timeout_jiffies = timeout;
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cs->skip_reset_on_timeout =
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hdev->skip_reset_on_timeout ||
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!!(flags & HL_CS_FLAGS_SKIP_RESET_ON_TIMEOUT);
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cs->submission_time_jiffies = jiffies;
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INIT_LIST_HEAD(&cs->job_list);
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@ -1278,6 +1278,11 @@ void hl_debugfs_add_device(struct hl_device *hdev)
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dev_entry->root,
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&dev_entry->blob_desc);
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debugfs_create_x8("skip_reset_on_timeout",
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0644,
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dev_entry->root,
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&hdev->skip_reset_on_timeout);
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for (i = 0, entry = dev_entry->entry_arr ; i < count ; i++, entry++) {
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debugfs_create_file(hl_debugfs_list[i].name,
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0444,
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@ -2191,6 +2191,8 @@ struct hl_mmu_funcs {
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* @supports_staged_submission: true if staged submissions are supported
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* @curr_reset_cause: saves an enumerated reset cause when a hard reset is
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* triggered, and cleared after it is shared with preboot.
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* @skip_reset_on_timeout: Skip device reset if CS has timed out, wait for it to
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* complete instead.
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*/
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struct hl_device {
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struct pci_dev *pdev;
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@ -2305,6 +2307,7 @@ struct hl_device {
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u8 device_fini_pending;
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u8 supports_staged_submission;
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u8 curr_reset_cause;
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u8 skip_reset_on_timeout;
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/* Parameters for bring-up */
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u64 nic_ports_mask;
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