66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
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// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
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/* Copyright(c) 2021 Intel Corporation */
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#include <linux/crc8.h>
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#include <linux/pci.h>
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#include <linux/types.h>
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#include "adf_accel_devices.h"
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#include "adf_pfvf_msg.h"
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#include "adf_pfvf_utils.h"
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/* CRC Calculation */
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DECLARE_CRC8_TABLE(pfvf_crc8_table);
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#define ADF_PFVF_CRC8_POLYNOMIAL 0x97
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void adf_pfvf_crc_init(void)
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{
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crc8_populate_msb(pfvf_crc8_table, ADF_PFVF_CRC8_POLYNOMIAL);
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}
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u8 adf_pfvf_calc_blkmsg_crc(u8 const *buf, u8 buf_len)
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{
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return crc8(pfvf_crc8_table, buf, buf_len, CRC8_INIT_VALUE);
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}
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static bool set_value_on_csr_msg(struct adf_accel_dev *accel_dev, u32 *csr_msg,
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u32 value, const struct pfvf_field_format *fmt)
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{
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if (unlikely((value & fmt->mask) != value)) {
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dev_err(&GET_DEV(accel_dev),
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"PFVF message value 0x%X out of range, %u max allowed\n",
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value, fmt->mask);
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return false;
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}
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*csr_msg |= value << fmt->offset;
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return true;
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}
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u32 adf_pfvf_csr_msg_of(struct adf_accel_dev *accel_dev,
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struct pfvf_message msg,
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const struct pfvf_csr_format *fmt)
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{
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u32 csr_msg = 0;
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if (!set_value_on_csr_msg(accel_dev, &csr_msg, msg.type, &fmt->type) ||
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!set_value_on_csr_msg(accel_dev, &csr_msg, msg.data, &fmt->data))
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return 0;
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return csr_msg | ADF_PFVF_MSGORIGIN_SYSTEM;
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}
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struct pfvf_message adf_pfvf_message_of(struct adf_accel_dev *accel_dev, u32 csr_msg,
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const struct pfvf_csr_format *fmt)
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{
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struct pfvf_message msg = { 0 };
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msg.type = (csr_msg >> fmt->type.offset) & fmt->type.mask;
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msg.data = (csr_msg >> fmt->data.offset) & fmt->data.mask;
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if (unlikely(!msg.type))
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dev_err(&GET_DEV(accel_dev),
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"Invalid PFVF msg with no type received\n");
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return msg;
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}
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