[Intel-xe] [PATCH v3 2/2] drm/xe/uapi: Return correct error code for xe_wait_user_fence_ioctl
Zeng, Oak
oak.zeng at intel.com
Wed Dec 6 03:55:39 UTC 2023
Reviewed-by: Oak Zeng <oak.zeng at intel.com>
> -----Original Message-----
> From: Bommu, Krishnaiah <krishnaiah.bommu at intel.com>
> Sent: Tuesday, December 5, 2023 10:42 PM
> To: intel-xe at lists.freedesktop.org
> Cc: Bommu, Krishnaiah <krishnaiah.bommu at intel.com>; Zeng, Oak
> <oak.zeng at intel.com>; Kempczynski, Zbigniew
> <zbigniew.kempczynski at intel.com>; Brost, Matthew
> <matthew.brost at intel.com>
> Subject: [PATCH v3 2/2] drm/xe/uapi: Return correct error code for
> xe_wait_user_fence_ioctl
>
> Currently xe_wait_user_fence_ioctl is not checking exec_queue state
> and blocking until timeout, with this patch wakeup the blocking wait
> if exec_queue reset happen and returning proper error code
>
> Signed-off-by: Bommu Krishnaiah <krishnaiah.bommu at intel.com>
> Cc: Oak Zeng <oak.zeng at intel.com>
> Cc: Kempczynski Zbigniew <Zbigniew.Kempczynski at intel.com>
> Cc: Matthew Brost <matthew.brost at intel.com>
> ---
> drivers/gpu/drm/xe/xe_exec_queue_types.h | 2 ++
> drivers/gpu/drm/xe/xe_execlist.c | 7 +++++++
> drivers/gpu/drm/xe/xe_guc_submit.c | 10 ++++++++++
> drivers/gpu/drm/xe/xe_wait_user_fence.c | 24 ++++++++++++++++++------
> 4 files changed, 37 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/xe/xe_exec_queue_types.h
> b/drivers/gpu/drm/xe/xe_exec_queue_types.h
> index 5ba47a5cfdbd..84ccf7242247 100644
> --- a/drivers/gpu/drm/xe/xe_exec_queue_types.h
> +++ b/drivers/gpu/drm/xe/xe_exec_queue_types.h
> @@ -206,6 +206,8 @@ struct xe_exec_queue_ops {
> * signalled when this function is called.
> */
> void (*resume)(struct xe_exec_queue *q);
> + /** @reset_status: check exec queue reset status */
> + bool (*reset_status)(struct xe_exec_queue *q);
> };
>
> #endif
> diff --git a/drivers/gpu/drm/xe/xe_execlist.c
> b/drivers/gpu/drm/xe/xe_execlist.c
> index e8754adfc52a..dab41e99f3d3 100644
> --- a/drivers/gpu/drm/xe/xe_execlist.c
> +++ b/drivers/gpu/drm/xe/xe_execlist.c
> @@ -446,6 +446,12 @@ static void execlist_exec_queue_resume(struct
> xe_exec_queue *q)
> /* NIY */
> }
>
> +static bool execlist_exec_queue_reset_status(struct xe_exec_queue *q)
> +{
> + /* NIY */
> + return false;
> +}
> +
> static const struct xe_exec_queue_ops execlist_exec_queue_ops = {
> .init = execlist_exec_queue_init,
> .kill = execlist_exec_queue_kill,
> @@ -457,6 +463,7 @@ static const struct xe_exec_queue_ops
> execlist_exec_queue_ops = {
> .suspend = execlist_exec_queue_suspend,
> .suspend_wait = execlist_exec_queue_suspend_wait,
> .resume = execlist_exec_queue_resume,
> + .reset_status = execlist_exec_queue_reset_status,
> };
>
> int xe_execlist_init(struct xe_gt *gt)
> diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c
> b/drivers/gpu/drm/xe/xe_guc_submit.c
> index 46b132ee1d3a..a42c3574cbec 100644
> --- a/drivers/gpu/drm/xe/xe_guc_submit.c
> +++ b/drivers/gpu/drm/xe/xe_guc_submit.c
> @@ -854,6 +854,10 @@ static void simple_error_capture(struct xe_exec_queue
> *q)
> static void xe_guc_exec_queue_trigger_cleanup(struct xe_exec_queue *q)
> {
> struct xe_guc *guc = exec_queue_to_guc(q);
> + struct xe_device *xe = guc_to_xe(guc);
> +
> + /** to wakeup xe_wait_user_fence ioctl if exec queue is reset */
> + wake_up_all(&xe->ufence_wq);
>
> if (xe_exec_queue_is_lr(q))
> queue_work(guc_to_gt(guc)->ordered_wq, &q->guc->lr_tdr);
> @@ -1394,6 +1398,11 @@ static void guc_exec_queue_resume(struct
> xe_exec_queue *q)
> guc_exec_queue_add_msg(q, msg, RESUME);
> }
>
> +static bool guc_exec_queue_reset_status(struct xe_exec_queue *q)
> +{
> + return exec_queue_reset(q);
> +}
> +
> /*
> * All of these functions are an abstraction layer which other parts of XE can
> * use to trap into the GuC backend. All of these functions, aside from init,
> @@ -1411,6 +1420,7 @@ static const struct xe_exec_queue_ops
> guc_exec_queue_ops = {
> .suspend = guc_exec_queue_suspend,
> .suspend_wait = guc_exec_queue_suspend_wait,
> .resume = guc_exec_queue_resume,
> + .reset_status = guc_exec_queue_reset_status,
> };
>
> static void guc_exec_queue_stop(struct xe_guc *guc, struct xe_exec_queue *q)
> diff --git a/drivers/gpu/drm/xe/xe_wait_user_fence.c
> b/drivers/gpu/drm/xe/xe_wait_user_fence.c
> index 9f272bbaad95..74f72dad2d0b 100644
> --- a/drivers/gpu/drm/xe/xe_wait_user_fence.c
> +++ b/drivers/gpu/drm/xe/xe_wait_user_fence.c
> @@ -13,6 +13,7 @@
> #include "xe_device.h"
> #include "xe_gt.h"
> #include "xe_macros.h"
> +#include "xe_exec_queue.h"
>
> static int do_compare(u64 addr, u64 value, u64 mask, u16 op)
> {
> @@ -100,10 +101,12 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev,
> void *data,
> struct drm_file *file)
> {
> struct xe_device *xe = to_xe_device(dev);
> + struct xe_file *xef = to_xe_file(file);
> DEFINE_WAIT_FUNC(w_wait, woken_wake_function);
> struct drm_xe_wait_user_fence *args = data;
> + struct xe_exec_queue *q = NULL;
> u64 addr = args->addr;
> - int err;
> + int err = 0;
> long timeout;
> ktime_t start;
>
> @@ -120,6 +123,10 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev,
> void *data,
> if (XE_IOCTL_DBG(xe, addr & 0x7))
> return -EINVAL;
>
> + q = xe_exec_queue_lookup(xef, args->exec_queue_id);
> + if (XE_IOCTL_DBG(xe, !q))
> + return -ENOENT;
> +
> timeout = to_jiffies_timeout(xe, args);
>
> start = ktime_get();
> @@ -135,6 +142,12 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev,
> void *data,
> break;
> }
>
> + if (q->ops->reset_status(q)) {
> + drm_info(&xe->drm, "exec gueue reset detected\n");
> + err = -EIO;
> + break;
> + }
> +
> if (!timeout) {
> err = -ETIME;
> break;
> @@ -150,10 +163,9 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev,
> void *data,
> args->timeout = 0;
> }
>
> - if (XE_IOCTL_DBG(xe, err < 0))
> - return err;
> - else if (XE_IOCTL_DBG(xe, !timeout))
> - return -ETIME;
> + if (!timeout && !(err < 0))
> + err = -ETIME;
>
> - return 0;
> + xe_exec_queue_put(q);
> + return err;
> }
> --
> 2.25.1
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