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linux/drivers/net/ethernet/qualcomm/qca_7k_common.h

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/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
/*
* Copyright (c) 2011, 2012, Atheros Communications Inc.
* Copyright (c) 2014, I2SE GmbH
*/
/* Atheros Ethernet framing. Every Ethernet frame is surrounded by an atheros
* frame while transmitted over a serial channel.
*/
#ifndef _QCA_FRAMING_H
#define _QCA_FRAMING_H
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/types.h>
/* Frame is currently being received */
#define QCAFRM_GATHER 0
/* No header byte while expecting it */
#define QCAFRM_NOHEAD (QCAFRM_ERR_BASE - 1)
/* No tailer byte while expecting it */
#define QCAFRM_NOTAIL (QCAFRM_ERR_BASE - 2)
/* Frame length is invalid */
#define QCAFRM_INVLEN (QCAFRM_ERR_BASE - 3)
/* Frame length is invalid */
#define QCAFRM_INVFRAME (QCAFRM_ERR_BASE - 4)
ethernet: use core min/max MTU checking et131x: min_mtu 64, max_mtu 9216 altera_tse: min_mtu 64, max_mtu 1500 amd8111e: min_mtu 60, max_mtu 9000 bnad: min_mtu 46, max_mtu 9000 macb: min_mtu 68, max_mtu 1500 or 10240 depending on hardware capability xgmac: min_mtu 46, max_mtu 9000 cxgb2: min_mtu 68, max_mtu 9582 (pm3393) or 9600 (vsc7326) enic: min_mtu 68, max_mtu 9000 gianfar: min_mtu 50, max_mu 9586 hns_enet: min_mtu 68, max_mtu 9578 (v1) or 9706 (v2) ksz884x: min_mtu 60, max_mtu 1894 myri10ge: min_mtu 68, max_mtu 9000 natsemi: min_mtu 64, max_mtu 2024 nfp: min_mtu 68, max_mtu hardware-specific forcedeth: min_mtu 64, max_mtu 1500 or 9100, depending on hardware pch_gbe: min_mtu 46, max_mtu 10300 pasemi_mac: min_mtu 64, max_mtu 9000 qcaspi: min_mtu 46, max_mtu 1500 - remove qcaspi_netdev_change_mtu as it is now redundant rocker: min_mtu 68, max_mtu 9000 sxgbe: min_mtu 68, max_mtu 9000 stmmac: min_mtu 46, max_mtu depends on hardware tehuti: min_mtu 60, max_mtu 16384 - driver had no max mtu checking, but product docs say 16k jumbo packets are supported by the hardware netcp: min_mtu 68, max_mtu 9486 - remove netcp_ndo_change_mtu as it is now redundant via-velocity: min_mtu 64, max_mtu 9000 octeon: min_mtu 46, max_mtu 65370 CC: netdev@vger.kernel.org CC: Mark Einon <mark.einon@gmail.com> CC: Vince Bridgers <vbridger@opensource.altera.com> CC: Rasesh Mody <rasesh.mody@qlogic.com> CC: Nicolas Ferre <nicolas.ferre@atmel.com> CC: Santosh Raspatur <santosh@chelsio.com> CC: Hariprasad S <hariprasad@chelsio.com> CC: Christian Benvenuti <benve@cisco.com> CC: Sujith Sankar <ssujith@cisco.com> CC: Govindarajulu Varadarajan <_govind@gmx.com> CC: Neel Patel <neepatel@cisco.com> CC: Claudiu Manoil <claudiu.manoil@freescale.com> CC: Yisen Zhuang <yisen.zhuang@huawei.com> CC: Salil Mehta <salil.mehta@huawei.com> CC: Hyong-Youb Kim <hykim@myri.com> CC: Jakub Kicinski <jakub.kicinski@netronome.com> CC: Olof Johansson <olof@lixom.net> CC: Jiri Pirko <jiri@resnulli.us> CC: Byungho An <bh74.an@samsung.com> CC: Girish K S <ks.giri@samsung.com> CC: Vipul Pandya <vipul.pandya@samsung.com> CC: Giuseppe Cavallaro <peppe.cavallaro@st.com> CC: Alexandre Torgue <alexandre.torgue@st.com> CC: Andy Gospodarek <andy@greyhouse.net> CC: Wingman Kwok <w-kwok2@ti.com> CC: Murali Karicheri <m-karicheri2@ti.com> CC: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-17 12:54:17 -07:00
/* Min/Max Ethernet MTU: 46/1500 */
#define QCAFRM_MIN_MTU (ETH_ZLEN - ETH_HLEN)
#define QCAFRM_MAX_MTU ETH_DATA_LEN
/* Min/Max frame lengths */
#define QCAFRM_MIN_LEN (QCAFRM_MIN_MTU + ETH_HLEN)
#define QCAFRM_MAX_LEN (QCAFRM_MAX_MTU + VLAN_ETH_HLEN)
/* QCA7K header len */
#define QCAFRM_HEADER_LEN 8
/* QCA7K footer len */
#define QCAFRM_FOOTER_LEN 2
/* QCA7K Framing. */
#define QCAFRM_ERR_BASE -1000
enum qcafrm_state {
/* HW length is only available on SPI */
QCAFRM_HW_LEN0 = 0x8000,
QCAFRM_HW_LEN1 = QCAFRM_HW_LEN0 - 1,
QCAFRM_HW_LEN2 = QCAFRM_HW_LEN1 - 1,
QCAFRM_HW_LEN3 = QCAFRM_HW_LEN2 - 1,
/* Waiting first 0xAA of header */
QCAFRM_WAIT_AA1 = QCAFRM_HW_LEN3 - 1,
/* Waiting second 0xAA of header */
QCAFRM_WAIT_AA2 = QCAFRM_WAIT_AA1 - 1,
/* Waiting third 0xAA of header */
QCAFRM_WAIT_AA3 = QCAFRM_WAIT_AA2 - 1,
/* Waiting fourth 0xAA of header */
QCAFRM_WAIT_AA4 = QCAFRM_WAIT_AA3 - 1,
/* Waiting Byte 0-1 of length (litte endian) */
QCAFRM_WAIT_LEN_BYTE0 = QCAFRM_WAIT_AA4 - 1,
QCAFRM_WAIT_LEN_BYTE1 = QCAFRM_WAIT_AA4 - 2,
/* Reserved bytes */
QCAFRM_WAIT_RSVD_BYTE1 = QCAFRM_WAIT_AA4 - 3,
QCAFRM_WAIT_RSVD_BYTE2 = QCAFRM_WAIT_AA4 - 4,
/* The frame length is used as the state until
* the end of the Ethernet frame
* Waiting for first 0x55 of footer
*/
QCAFRM_WAIT_551 = 1,
/* Waiting for second 0x55 of footer */
QCAFRM_WAIT_552 = QCAFRM_WAIT_551 - 1
};
/* Structure to maintain the frame decoding during reception. */
struct qcafrm_handle {
/* Current decoding state */
enum qcafrm_state state;
/* Initial state depends on connection type */
enum qcafrm_state init;
/* Offset in buffer (borrowed for length too) */
u16 offset;
};
u16 qcafrm_create_header(u8 *buf, u16 len);
u16 qcafrm_create_footer(u8 *buf);
static inline void qcafrm_fsm_init_spi(struct qcafrm_handle *handle)
{
handle->init = QCAFRM_HW_LEN0;
handle->state = handle->init;
}
static inline void qcafrm_fsm_init_uart(struct qcafrm_handle *handle)
{
handle->init = QCAFRM_WAIT_AA1;
handle->state = handle->init;
}
s32 qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_byte);
#endif /* _QCA_FRAMING_H */