linux-kernel - [PATCH V1] accel/amdxdna: Enable hardware context priority

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Message-ID: <20251217171719.2139025-1-lizhi.hou@amd.com>
Date: Wed, 17 Dec 2025 09:17:19 -0800
From: Lizhi Hou <lizhi.hou@....com>
To: <ogabbay@...nel.org>, <quic_jhugo@...cinc.com>,
	<dri-devel@...ts.freedesktop.org>, <maciej.falkowski@...ux.intel.com>
CC: Lizhi Hou <lizhi.hou@....com>, <linux-kernel@...r.kernel.org>,
	<max.zhen@....com>, <sonal.santan@....com>, <mario.limonciello@....com>
Subject: [PATCH V1] accel/amdxdna: Enable hardware context priority

Newer firmware supports hardware context priority. Set the priority based
on application input.

Signed-off-by: Lizhi Hou <lizhi.hou@....com>
---
 drivers/accel/amdxdna/aie2_message.c  | 23 ++++++++++++++++++++++-
 drivers/accel/amdxdna/aie2_msg_priv.h |  5 +++++
 include/uapi/drm/amdxdna_accel.h      |  8 ++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/accel/amdxdna/aie2_message.c b/drivers/accel/amdxdna/aie2_message.c
index e77a353cadc5..051f4ceaabae 100644
--- a/drivers/accel/amdxdna/aie2_message.c
+++ b/drivers/accel/amdxdna/aie2_message.c
@@ -205,6 +205,27 @@ static int aie2_destroy_context_req(struct amdxdna_dev_hdl *ndev, u32 id)
 
 	return ret;
 }
+
+static u32 aie2_get_context_priority(struct amdxdna_dev_hdl *ndev,
+				     struct amdxdna_hwctx *hwctx)
+{
+	if (!AIE2_FEATURE_ON(ndev, AIE2_PREEMPT))
+		return PRIORITY_HIGH;
+
+	switch (hwctx->qos.priority) {
+	case AMDXDNA_QOS_REALTIME_PRIORITY:
+		return PRIORITY_REALTIME;
+	case AMDXDNA_QOS_HIGH_PRIORITY:
+		return PRIORITY_HIGH;
+	case AMDXDNA_QOS_NORMAL_PRIORITY:
+		return PRIORITY_NORMAL;
+	case AMDXDNA_QOS_LOW_PRIORITY:
+		return PRIORITY_LOW;
+	default:
+		return PRIORITY_HIGH;
+	}
+}
+
 int aie2_create_context(struct amdxdna_dev_hdl *ndev, struct amdxdna_hwctx *hwctx)
 {
 	DECLARE_AIE2_MSG(create_ctx, MSG_OP_CREATE_CONTEXT);
@@ -221,7 +242,7 @@ int aie2_create_context(struct amdxdna_dev_hdl *ndev, struct amdxdna_hwctx *hwct
 	req.num_unused_col = hwctx->num_unused_col;
 	req.num_cq_pairs_requested = 1;
 	req.pasid = hwctx->client->pasid;
-	req.context_priority = 2;
+	req.context_priority = aie2_get_context_priority(ndev, hwctx);
 
 	ret = aie2_send_mgmt_msg_wait(ndev, &msg);
 	if (ret)
diff --git a/drivers/accel/amdxdna/aie2_msg_priv.h b/drivers/accel/amdxdna/aie2_msg_priv.h
index cc912b7899ce..728ef56f7f0a 100644
--- a/drivers/accel/amdxdna/aie2_msg_priv.h
+++ b/drivers/accel/amdxdna/aie2_msg_priv.h
@@ -108,6 +108,11 @@ struct cq_pair {
 	struct cq_info i2x_q;
 };
 
+#define PRIORITY_REALTIME	1
+#define PRIORITY_HIGH		2
+#define PRIORITY_NORMAL		3
+#define PRIORITY_LOW		4
+
 struct create_ctx_req {
 	__u32	aie_type;
 	__u8	start_col;
diff --git a/include/uapi/drm/amdxdna_accel.h b/include/uapi/drm/amdxdna_accel.h
index 62c917fd4f7b..9c44db2b3dcd 100644
--- a/include/uapi/drm/amdxdna_accel.h
+++ b/include/uapi/drm/amdxdna_accel.h
@@ -19,6 +19,14 @@ extern "C" {
 #define AMDXDNA_INVALID_BO_HANDLE	0
 #define AMDXDNA_INVALID_FENCE_HANDLE	0
 
+/*
+ * Define hardware context priority
+ */
+#define AMDXDNA_QOS_REALTIME_PRIORITY	0x100
+#define AMDXDNA_QOS_HIGH_PRIORITY	0x180
+#define AMDXDNA_QOS_NORMAL_PRIORITY	0x200
+#define AMDXDNA_QOS_LOW_PRIORITY	0x280
+
 enum amdxdna_device_type {
 	AMDXDNA_DEV_TYPE_UNKNOWN = -1,
 	AMDXDNA_DEV_TYPE_KMQ,
-- 
2.34.1