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habanalabs: add reset support when user closes FD 

In order to support command submissions that are done directly from
user space, the driver must perform soft reset once user closes its FD.
In case the soft reset fails or device is not idle, a hard reset should
be performed.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Ofir Bitton 2021-02-10 14:29:33 +02:00 committed by Oded Gabbay
parent b6821b3c65
commit 8e9445a678
2 changed files with 20 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/misc/habanalabs/common/device.c
View File

@ -103,8 +103,24 @@ static int hl_device_release(struct inode *inode, struct file *filp)
return 0;
}
hl_cb_mgr_fini(hpriv->hdev, &hpriv->cb_mgr);
hl_ctx_mgr_fini(hpriv->hdev, &hpriv->ctx_mgr);
hl_cb_mgr_fini(hdev, &hpriv->cb_mgr);
hl_ctx_mgr_fini(hdev, &hpriv->ctx_mgr);
if (hdev->reset_upon_device_release) {
u64 idle_mask[HL_BUSY_ENGINES_MASK_EXT_SIZE] = {0};
/* We try soft reset first */
hl_device_reset(hdev, false, false);
/* If device is not idle perform hard reset */
if (!hdev->asic_funcs->is_device_idle(hdev, idle_mask,
HL_BUSY_ENGINES_MASK_EXT_SIZE, NULL)) {
dev_info(hdev->dev,
"device is not idle (mask %#llx %#llx) after soft reset, performing hard reset",
idle_mask[0], idle_mask[1]);
hl_device_reset(hdev, true, false);
}
}
hl_hpriv_put(hpriv);

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

@ -1920,6 +1920,7 @@ struct hl_mmu_funcs {
* @device_fini_pending: true if device_fini was called and might be
* waiting for the reset thread to finish
* @supports_staged_submission: true if staged submissions are supported
* @reset_upon_device_release: true if reset is required upon device release
*/
struct hl_device {
struct pci_dev *pdev;
@ -2026,6 +2027,7 @@ struct hl_device {
u8 process_kill_trial_cnt;
u8 device_fini_pending;
u8 supports_staged_submission;
u8 reset_upon_device_release;
/* Parameters for bring-up */
u64 nic_ports_mask;