Commit 6b759618 authored by Wenkai Lin's avatar Wenkai Lin Committed by Zheng Zengkai
Browse files

crypto: hisilicon/qm - implement for querying hardware tasks status. 

mainline inclusion
from mainline-master
commit d18344c0
category: feature
bugzilla: 173981
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d18344c0d095df544bd7174b8fae2cba523dd4a4



----------------------------------------------------------------------

This patch adds a function hisi_qm_is_q_updated to
check if the task is ready in hardware queue when
user polls an UACCE queue.This prevents users from
repeatedly querying whether the accelerator has
completed tasks, which wastes CPU resources.

Signed-off-by: default avatarWenkai Lin <linwenkai6@hisilicon.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarMingqiang Ling <lingmingqiang@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 989a5c5d

drivers/crypto/hisilicon/qm.c

+18 −0
Original line number Diff line number Diff line
@@ -2926,6 +2926,23 @@ static void hisi_qm_uacce_stop_queue(struct uacce_queue *q) 
	hisi_qm_stop_qp(q->priv);

}



static int hisi_qm_is_q_updated(struct uacce_queue *q)

{

	struct hisi_qp *qp = q->priv;

	struct qm_cqe *cqe = qp->cqe + qp->qp_status.cq_head;

	int updated = 0;



	while (QM_CQE_PHASE(cqe) == qp->qp_status.cqc_phase) {

		/* make sure to read data from memory */

		dma_rmb();

		qm_cq_head_update(qp);

		cqe = qp->cqe + qp->qp_status.cq_head;

		updated = 1;

	}



	return updated;

}



static void qm_set_sqctype(struct uacce_queue *q, u16 type)

{

	struct hisi_qm *qm = q->uacce->priv;
@@ -2971,6 +2988,7 @@ static const struct uacce_ops uacce_qm_ops = { 
	.stop_queue = hisi_qm_uacce_stop_queue,

	.mmap = hisi_qm_uacce_mmap,

	.ioctl = hisi_qm_uacce_ioctl,

	.is_q_updated = hisi_qm_is_q_updated,

};



static int qm_alloc_uacce(struct hisi_qm *qm)