1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_pfvf_utils.c b/drivers/crypto/qat/qat_common/adf_pfvf_utils.c
new file mode 100644
index 000000000000..c5f6d77d4bb8
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_pfvf_utils.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2021 Intel Corporation */
+#include <linux/crc8.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include "adf_accel_devices.h"
+#include "adf_pfvf_msg.h"
+#include "adf_pfvf_utils.h"
+
+/* CRC Calculation */
+DECLARE_CRC8_TABLE(pfvf_crc8_table);
+#define ADF_PFVF_CRC8_POLYNOMIAL 0x97
+
+void adf_pfvf_crc_init(void)
+{
+	crc8_populate_msb(pfvf_crc8_table, ADF_PFVF_CRC8_POLYNOMIAL);
+}
+
+u8 adf_pfvf_calc_blkmsg_crc(u8 const *buf, u8 buf_len)
+{
+	return crc8(pfvf_crc8_table, buf, buf_len, CRC8_INIT_VALUE);
+}
+
+static bool set_value_on_csr_msg(struct adf_accel_dev *accel_dev, u32 *csr_msg,
+				 u32 value, const struct pfvf_field_format *fmt)
+{
+	if (unlikely((value & fmt->mask) != value)) {
+		dev_err(&GET_DEV(accel_dev),
+			"PFVF message value 0x%X out of range, %u max allowed\n",
+			value, fmt->mask);
+		return false;
+	}
+
+	*csr_msg |= value << fmt->offset;
+
+	return true;
+}
+
+u32 adf_pfvf_csr_msg_of(struct adf_accel_dev *accel_dev,
+			struct pfvf_message msg,
+			const struct pfvf_csr_format *fmt)
+{
+	u32 csr_msg = 0;
+
+	if (!set_value_on_csr_msg(accel_dev, &csr_msg, msg.type, &fmt->type) ||
+	    !set_value_on_csr_msg(accel_dev, &csr_msg, msg.data, &fmt->data))
+		return 0;
+
+	return csr_msg | ADF_PFVF_MSGORIGIN_SYSTEM;
+}
+
+struct pfvf_message adf_pfvf_message_of(struct adf_accel_dev *accel_dev, u32 csr_msg,
+					const struct pfvf_csr_format *fmt)
+{
+	struct pfvf_message msg = { 0 };
+
+	msg.type = (csr_msg >> fmt->type.offset) & fmt->type.mask;
+	msg.data = (csr_msg >> fmt->data.offset) & fmt->data.mask;
+
+	if (unlikely(!msg.type))
+		dev_err(&GET_DEV(accel_dev),
+			"Invalid PFVF msg with no type received\n");
+
+	return msg;
+}