Commit 2f30decd authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

dmaengine: idxd: add per DSA wq workqueue for processing cr faults 



Add a workqueue for user submitted completion record fault processing.
The workqueue creation and destruction lifetime will be tied to the user
sub-driver since it will only be used when the wq is a user type.

Tested-by: default avatarTony Zhu <tony.zhu@intel.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Co-developed-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20230407203143.2189681-7-fenghua.yu@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 5fbe6503

drivers/dma/idxd/cdev.c

+11 −0
Original line number Diff line number Diff line
@@ -330,6 +330,13 @@ static int idxd_user_drv_probe(struct idxd_dev *idxd_dev) 
	}



	mutex_lock(&wq->wq_lock);



	wq->wq = create_workqueue(dev_name(wq_confdev(wq)));

	if (!wq->wq) {

		rc = -ENOMEM;

		goto wq_err;

	}



	wq->type = IDXD_WQT_USER;

	rc = drv_enable_wq(wq);

	if (rc < 0)
@@ -348,7 +355,9 @@ static int idxd_user_drv_probe(struct idxd_dev *idxd_dev) 
err_cdev:

	drv_disable_wq(wq);

err:

	destroy_workqueue(wq->wq);

	wq->type = IDXD_WQT_NONE;

wq_err:

	mutex_unlock(&wq->wq_lock);

	return rc;

}
@@ -361,6 +370,8 @@ static void idxd_user_drv_remove(struct idxd_dev *idxd_dev) 
	idxd_wq_del_cdev(wq);

	drv_disable_wq(wq);

	wq->type = IDXD_WQT_NONE;

	destroy_workqueue(wq->wq);

	wq->wq = NULL;

	mutex_unlock(&wq->wq_lock);

}

drivers/dma/idxd/idxd.h

+1 −0
Original line number Diff line number Diff line
@@ -185,6 +185,7 @@ struct idxd_wq { 
	struct idxd_dev idxd_dev;

	struct idxd_cdev *idxd_cdev;

	struct wait_queue_head err_queue;

	struct workqueue_struct *wq;

	struct idxd_device *idxd;

	int id;

	struct idxd_irq_entry ie;