linux-kernel - [PATCH 03/10] crypto: hisilicon/qm - add UACCE_CMD_QM_SET_QP

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Date:   Fri, 9 Sep 2022 17:46:57 +0800
From:   Weili Qian <qianweili@...wei.com>
To:     <herbert@...dor.apana.org.au>
CC:     <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <liulongfang@...wei.com>,
        Weili Qian <qianweili@...wei.com>
Subject: [PATCH 03/10] crypto: hisilicon/qm - add UACCE_CMD_QM_SET_QP_INFO support

To be compatible with accelerator devices of different
versions, 'UACCE_CMD_QM_SET_QP_INFO' ioctl is added to obtain
queue information in userspace, including queue depth and buffer
description size.

Signed-off-by: Weili Qian <qianweili@...wei.com>
---
 drivers/crypto/hisilicon/qm.c     | 21 ++++++++++++++++++---
 include/uapi/misc/uacce/hisi_qm.h | 17 ++++++++++++++++-
 2 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index b3216ee627e5..e227a3e50600 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3430,6 +3430,7 @@ static long hisi_qm_uacce_ioctl(struct uacce_queue *q, unsigned int cmd,
 				unsigned long arg)
 {
 	struct hisi_qp *qp = q->priv;
+	struct hisi_qp_info qp_info;
 	struct hisi_qp_ctx qp_ctx;
 
 	if (cmd == UACCE_CMD_QM_SET_QP_CTX) {
@@ -3446,11 +3447,25 @@ static long hisi_qm_uacce_ioctl(struct uacce_queue *q, unsigned int cmd,
 		if (copy_to_user((void __user *)arg, &qp_ctx,
 				 sizeof(struct hisi_qp_ctx)))
 			return -EFAULT;
-	} else {
-		return -EINVAL;
+
+		return 0;
+	} else if (cmd == UACCE_CMD_QM_SET_QP_INFO) {
+		if (copy_from_user(&qp_info, (void __user *)arg,
+				   sizeof(struct hisi_qp_info)))
+			return -EFAULT;
+
+		qp_info.sqe_size = qp->qm->sqe_size;
+		qp_info.sq_depth = qp->sq_depth;
+		qp_info.cq_depth = qp->cq_depth;
+
+		if (copy_to_user((void __user *)arg, &qp_info,
+				  sizeof(struct hisi_qp_info)))
+			return -EFAULT;
+
+		return 0;
 	}
 
-	return 0;
+	return -EINVAL;
 }
 
 static const struct uacce_ops uacce_qm_ops = {
diff --git a/include/uapi/misc/uacce/hisi_qm.h b/include/uapi/misc/uacce/hisi_qm.h
index 1faef5ff87ef..3e66dbc2f323 100644
--- a/include/uapi/misc/uacce/hisi_qm.h
+++ b/include/uapi/misc/uacce/hisi_qm.h
@@ -14,11 +14,26 @@ struct hisi_qp_ctx {
 	__u16 qc_type;
 };
 
+/**
+ * struct hisi_qp_info - User data for hisi qp.
+ * @sqe_size: Submission queue element size
+ * @sq_depth: The number of sqe
+ * @cq_depth: The number of cqe
+ * @reserved: Reserved data
+ */
+struct hisi_qp_info {
+	__u32 sqe_size;
+	__u16 sq_depth;
+	__u16 cq_depth;
+	__u64 reserved;
+};
+
 #define HISI_QM_API_VER_BASE "hisi_qm_v1"
 #define HISI_QM_API_VER2_BASE "hisi_qm_v2"
 #define HISI_QM_API_VER3_BASE "hisi_qm_v3"
 
 /* UACCE_CMD_QM_SET_QP_CTX: Set qp algorithm type */
 #define UACCE_CMD_QM_SET_QP_CTX	_IOWR('H', 10, struct hisi_qp_ctx)
-
+/* UACCE_CMD_QM_SET_QP_INFO: Set qp depth and BD size */
+#define UACCE_CMD_QM_SET_QP_INFO _IOWR('H', 11, struct hisi_qp_info)
 #endif
-- 
2.33.0