lkml.org 
[lkml]   [2022]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5/7] habanalabs: allow control device open during reset
Date
From: Ofir Bitton <obitton@habana.ai>

Monitoring apps would like to query device state at any time so we
should allow it also during reset because it doesn't involve
accessing the h/w.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
drivers/misc/habanalabs/common/device.c | 22 +++++++++++++++++++
drivers/misc/habanalabs/common/habanalabs.h | 2 ++
.../misc/habanalabs/common/habanalabs_drv.c | 4 ++--
3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 230b7eeef962..ea6238e614f1 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -352,6 +352,28 @@ bool hl_device_operational(struct hl_device *hdev,
}
}

+bool hl_ctrl_device_operational(struct hl_device *hdev,
+ enum hl_device_status *status)
+{
+ enum hl_device_status current_status;
+
+ current_status = hl_device_status(hdev);
+ if (status)
+ *status = current_status;
+
+ switch (current_status) {
+ case HL_DEVICE_STATUS_MALFUNCTION:
+ return false;
+ case HL_DEVICE_STATUS_IN_RESET:
+ case HL_DEVICE_STATUS_IN_RESET_AFTER_DEVICE_RELEASE:
+ case HL_DEVICE_STATUS_NEEDS_RESET:
+ case HL_DEVICE_STATUS_OPERATIONAL:
+ case HL_DEVICE_STATUS_IN_DEVICE_CREATION:
+ default:
+ return true;
+ }
+}
+
static void hpriv_release(struct kref *ref)
{
u64 idle_mask[HL_BUSY_ENGINES_MASK_EXT_SIZE] = {0};
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 33c6476b60a9..cf9cbbd09063 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -3486,6 +3486,8 @@ int hl_device_open(struct inode *inode, struct file *filp);
int hl_device_open_ctrl(struct inode *inode, struct file *filp);
bool hl_device_operational(struct hl_device *hdev,
enum hl_device_status *status);
+bool hl_ctrl_device_operational(struct hl_device *hdev,
+ enum hl_device_status *status);
enum hl_device_status hl_device_status(struct hl_device *hdev);
int hl_device_set_debug_mode(struct hl_device *hdev, struct hl_ctx *ctx, bool enable);
int hl_hw_queues_create(struct hl_device *hdev);
diff --git a/drivers/misc/habanalabs/common/habanalabs_drv.c b/drivers/misc/habanalabs/common/habanalabs_drv.c
index e12148428731..7bf0dc245d39 100644
--- a/drivers/misc/habanalabs/common/habanalabs_drv.c
+++ b/drivers/misc/habanalabs/common/habanalabs_drv.c
@@ -268,9 +268,9 @@ int hl_device_open_ctrl(struct inode *inode, struct file *filp)

mutex_lock(&hdev->fpriv_ctrl_list_lock);

- if (!hl_device_operational(hdev, NULL)) {
+ if (!hl_ctrl_device_operational(hdev, NULL)) {
dev_err_ratelimited(hdev->dev_ctrl,
- "Can't open %s because it is disabled or in reset\n",
+ "Can't open %s because it is disabled\n",
dev_name(hdev->dev_ctrl));
rc = -EPERM;
goto out_err;
--
2.25.1
\
 
 \ /
  Last update: 2022-08-29 11:23    [W:0.528 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site