linux-libre/drivers/net/ethernet/stmicro/stmmac/descs.h

/*******************************************************************************
  Header File to describe the DMA descriptors and related definitions.
  This is for DWMAC100 and 1000 cores.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/

#ifndef __DESCS_H__
#define __DESCS_H__

#include <linux/bitops.h>

/* Normal receive descriptor defines */

/* RDES0 */
#define	RDES0_PAYLOAD_CSUM_ERR	BIT(0)
#define	RDES0_CRC_ERROR		BIT(1)
#define	RDES0_DRIBBLING		BIT(2)
#define	RDES0_MII_ERROR		BIT(3)
#define	RDES0_RECEIVE_WATCHDOG	BIT(4)
#define	RDES0_FRAME_TYPE	BIT(5)
#define	RDES0_COLLISION		BIT(6)
#define	RDES0_IPC_CSUM_ERROR	BIT(7)
#define	RDES0_LAST_DESCRIPTOR	BIT(8)
#define	RDES0_FIRST_DESCRIPTOR	BIT(9)
#define	RDES0_VLAN_TAG		BIT(10)
#define	RDES0_OVERFLOW_ERROR	BIT(11)
#define	RDES0_LENGTH_ERROR	BIT(12)
#define	RDES0_SA_FILTER_FAIL	BIT(13)
#define	RDES0_DESCRIPTOR_ERROR	BIT(14)
#define	RDES0_ERROR_SUMMARY	BIT(15)
#define	RDES0_FRAME_LEN_MASK	GENMASK(29, 16)
#define RDES0_FRAME_LEN_SHIFT	16
#define	RDES0_DA_FILTER_FAIL	BIT(30)
#define	RDES0_OWN		BIT(31)
			/* RDES1 */
#define	RDES1_BUFFER1_SIZE_MASK		GENMASK(10, 0)
#define	RDES1_BUFFER2_SIZE_MASK		GENMASK(21, 11)
#define	RDES1_BUFFER2_SIZE_SHIFT	11
#define	RDES1_SECOND_ADDRESS_CHAINED	BIT(24)
#define	RDES1_END_RING			BIT(25)
#define	RDES1_DISABLE_IC		BIT(31)

/* Enhanced receive descriptor defines */

/* RDES0 (similar to normal RDES) */
#define	 ERDES0_RX_MAC_ADDR	BIT(0)

/* RDES1: completely differ from normal desc definitions */
#define	ERDES1_BUFFER1_SIZE_MASK	GENMASK(12, 0)
#define	ERDES1_SECOND_ADDRESS_CHAINED	BIT(14)
#define	ERDES1_END_RING			BIT(15)
#define	ERDES1_BUFFER2_SIZE_MASK	GENMASK(28, 16)
#define ERDES1_BUFFER2_SIZE_SHIFT	16
#define	ERDES1_DISABLE_IC		BIT(31)

/* Normal transmit descriptor defines */
/* TDES0 */
#define	TDES0_DEFERRED			BIT(0)
#define	TDES0_UNDERFLOW_ERROR		BIT(1)
#define	TDES0_EXCESSIVE_DEFERRAL	BIT(2)
#define	TDES0_COLLISION_COUNT_MASK	GENMASK(6, 3)
#define	TDES0_VLAN_FRAME		BIT(7)
#define	TDES0_EXCESSIVE_COLLISIONS	BIT(8)
#define	TDES0_LATE_COLLISION		BIT(9)
#define	TDES0_NO_CARRIER		BIT(10)
#define	TDES0_LOSS_CARRIER		BIT(11)
#define	TDES0_PAYLOAD_ERROR		BIT(12)
#define	TDES0_FRAME_FLUSHED		BIT(13)
#define	TDES0_JABBER_TIMEOUT		BIT(14)
#define	TDES0_ERROR_SUMMARY		BIT(15)
#define	TDES0_IP_HEADER_ERROR		BIT(16)
#define	TDES0_TIME_STAMP_STATUS		BIT(17)
#define	TDES0_OWN			BIT(31)
/* TDES1 */
#define	TDES1_BUFFER1_SIZE_MASK		GENMASK(10, 0)
#define	TDES1_BUFFER2_SIZE_MASK		GENMASK(21, 11)
#define	TDES1_BUFFER2_SIZE_SHIFT	11
#define	TDES1_TIME_STAMP_ENABLE		BIT(22)
#define	TDES1_DISABLE_PADDING		BIT(23)
#define	TDES1_SECOND_ADDRESS_CHAINED	BIT(24)
#define	TDES1_END_RING			BIT(25)
#define	TDES1_CRC_DISABLE		BIT(26)
#define	TDES1_CHECKSUM_INSERTION_MASK	GENMASK(28, 27)
#define	TDES1_CHECKSUM_INSERTION_SHIFT	27
#define	TDES1_FIRST_SEGMENT		BIT(29)
#define	TDES1_LAST_SEGMENT		BIT(30)
#define	TDES1_INTERRUPT			BIT(31)

/* Enhanced transmit descriptor defines */
/* TDES0 */
#define	ETDES0_DEFERRED			BIT(0)
#define	ETDES0_UNDERFLOW_ERROR		BIT(1)
#define	ETDES0_EXCESSIVE_DEFERRAL	BIT(2)
#define	ETDES0_COLLISION_COUNT_MASK	GENMASK(6, 3)
#define	ETDES0_VLAN_FRAME		BIT(7)
#define	ETDES0_EXCESSIVE_COLLISIONS	BIT(8)
#define	ETDES0_LATE_COLLISION		BIT(9)
#define	ETDES0_NO_CARRIER		BIT(10)
#define	ETDES0_LOSS_CARRIER		BIT(11)
#define	ETDES0_PAYLOAD_ERROR		BIT(12)
#define	ETDES0_FRAME_FLUSHED		BIT(13)
#define	ETDES0_JABBER_TIMEOUT		BIT(14)
#define	ETDES0_ERROR_SUMMARY		BIT(15)
#define	ETDES0_IP_HEADER_ERROR		BIT(16)
#define	ETDES0_TIME_STAMP_STATUS	BIT(17)
#define	ETDES0_SECOND_ADDRESS_CHAINED	BIT(20)
#define	ETDES0_END_RING			BIT(21)
#define	ETDES0_CHECKSUM_INSERTION_MASK	GENMASK(23, 22)
#define	ETDES0_CHECKSUM_INSERTION_SHIFT	22
#define	ETDES0_TIME_STAMP_ENABLE	BIT(25)
#define	ETDES0_DISABLE_PADDING		BIT(26)
#define	ETDES0_CRC_DISABLE		BIT(27)
#define	ETDES0_FIRST_SEGMENT		BIT(28)
#define	ETDES0_LAST_SEGMENT		BIT(29)
#define	ETDES0_INTERRUPT		BIT(30)
#define	ETDES0_OWN			BIT(31)
/* TDES1 */
#define	ETDES1_BUFFER1_SIZE_MASK	GENMASK(12, 0)
#define	ETDES1_BUFFER2_SIZE_MASK	GENMASK(28, 16)
#define	ETDES1_BUFFER2_SIZE_SHIFT	16

/* Extended Receive descriptor definitions */
#define	ERDES4_IP_PAYLOAD_TYPE_MASK	GENMASK(2, 6)
#define	ERDES4_IP_HDR_ERR		BIT(3)
#define	ERDES4_IP_PAYLOAD_ERR		BIT(4)
#define	ERDES4_IP_CSUM_BYPASSED		BIT(5)
#define	ERDES4_IPV4_PKT_RCVD		BIT(6)
#define	ERDES4_IPV6_PKT_RCVD		BIT(7)
#define	ERDES4_MSG_TYPE_MASK		GENMASK(11, 8)
#define	ERDES4_PTP_FRAME_TYPE		BIT(12)
#define	ERDES4_PTP_VER			BIT(13)
#define	ERDES4_TIMESTAMP_DROPPED	BIT(14)
#define	ERDES4_AV_PKT_RCVD		BIT(16)
#define	ERDES4_AV_TAGGED_PKT_RCVD	BIT(17)
#define	ERDES4_VLAN_TAG_PRI_VAL_MASK	GENMASK(20, 18)
#define	ERDES4_L3_FILTER_MATCH		BIT(24)
#define	ERDES4_L4_FILTER_MATCH		BIT(25)
#define	ERDES4_L3_L4_FILT_NO_MATCH_MASK	GENMASK(27, 26)

/* Extended RDES4 message type definitions */
#define RDES_EXT_NO_PTP			0x0
#define RDES_EXT_SYNC			0x1
#define RDES_EXT_FOLLOW_UP		0x2
#define RDES_EXT_DELAY_REQ		0x3
#define RDES_EXT_DELAY_RESP		0x4
#define RDES_EXT_PDELAY_REQ		0x5
#define RDES_EXT_PDELAY_RESP		0x6
#define RDES_EXT_PDELAY_FOLLOW_UP	0x7
#define RDES_PTP_ANNOUNCE		0x8
#define RDES_PTP_MANAGEMENT		0x9
#define RDES_PTP_SIGNALING		0xa
#define RDES_PTP_PKT_RESERVED_TYPE	0xf

/* Basic descriptor structure for normal and alternate descriptors */
struct dma_desc {
	unsigned int des0;
	unsigned int des1;
	unsigned int des2;
	unsigned int des3;
};

/* Extended descriptor structure (e.g. >= databook 3.50a) */
struct dma_extended_desc {
	struct dma_desc basic;	/* Basic descriptors */
	unsigned int des4;	/* Extended Status */
	unsigned int des5;	/* Reserved */
	unsigned int des6;	/* Tx/Rx Timestamp Low */
	unsigned int des7;	/* Tx/Rx Timestamp High */
};

/* Transmit checksum insertion control */
#define	TX_CIC_FULL	3	/* Include IP header and pseudoheader */

#endif /* __DESCS_H__ */