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// 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;
}
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