xref: /drivers/net/ethernet/cisco/enic/cq_enet_desc.h

/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#ifndef _CQ_ENET_DESC_H_
#define _CQ_ENET_DESC_H_

#include "cq_desc.h"

/* Ethernet completion queue descriptor: 16B */
struct cq_enet_wq_desc {
	__le16 completed_index;
	__le16 q_number;
	u8 reserved[11];
	u8 type_color;
};

static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
	u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
{
	cq_desc_dec((struct cq_desc *)desc, type,
		color, q_number, completed_index);
}

/* Completion queue descriptor: Ethernet receive queue, 16B */
struct cq_enet_rq_desc {
	__le16 completed_index_flags;
	__le16 q_number_rss_type_flags;
	__le32 rss_hash;
	__le16 bytes_written_flags;
	__le16 vlan;
	__le16 checksum_fcoe;
	u8 flags;
	u8 type_color;
};

#define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT          (0x1 << 12)
#define CQ_ENET_RQ_DESC_FLAGS_FCOE                  (0x1 << 13)
#define CQ_ENET_RQ_DESC_FLAGS_EOP                   (0x1 << 14)
#define CQ_ENET_RQ_DESC_FLAGS_SOP                   (0x1 << 15)

#define CQ_ENET_RQ_DESC_RSS_TYPE_BITS               4
#define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
	((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
#define CQ_ENET_RQ_DESC_RSS_TYPE_NONE               0
#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4               1
#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4           2
#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6               3
#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6           4
#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX            5
#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX        6

#define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC         (0x1 << 14)

#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS          14
#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
	((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
#define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED             (0x1 << 14)
#define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED         (0x1 << 15)

#define CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_BITS          12
#define CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK \
	((1 << CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_BITS) - 1)
#define CQ_ENET_RQ_DESC_VLAN_TCI_CFI_MASK           (0x1 << 12)
#define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_BITS     3
#define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_MASK \
	((1 << CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_BITS) - 1)
#define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_SHIFT    13

#define CQ_ENET_RQ_DESC_FCOE_SOF_BITS               8
#define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
	((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
#define CQ_ENET_RQ_DESC_FCOE_EOF_BITS               8
#define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
	((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
#define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT              8

#define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK       (0x1 << 0)
#define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK              (0x1 << 0)
#define CQ_ENET_RQ_DESC_FLAGS_UDP                   (0x1 << 1)
#define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR              (0x1 << 1)
#define CQ_ENET_RQ_DESC_FLAGS_TCP                   (0x1 << 2)
#define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK          (0x1 << 3)
#define CQ_ENET_RQ_DESC_FLAGS_IPV6                  (0x1 << 4)
#define CQ_ENET_RQ_DESC_FLAGS_IPV4                  (0x1 << 5)
#define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT         (0x1 << 6)
#define CQ_ENET_RQ_DESC_FLAGS_FCS_OK                (0x1 << 7)

static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
	u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
	u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
	u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
	u8 *vlan_stripped, u16 *vlan_tci, u16 *checksum, u8 *fcoe_sof,
	u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
	u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
	u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
{
	u16 completed_index_flags;
	u16 q_number_rss_type_flags;
	u16 bytes_written_flags;

	cq_desc_dec((struct cq_desc *)desc, type,
		color, q_number, completed_index);

	completed_index_flags = le16_to_cpu(desc->completed_index_flags);
	q_number_rss_type_flags =
		le16_to_cpu(desc->q_number_rss_type_flags);
	bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);

	*ingress_port = (completed_index_flags &
		CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
	*fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
		1 : 0;
	*eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
		1 : 0;
	*sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
		1 : 0;

	*rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
		CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
	*csum_not_calc = (q_number_rss_type_flags &
		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;

	*rss_hash = le32_to_cpu(desc->rss_hash);

	*bytes_written = bytes_written_flags &
		CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
	*packet_error = (bytes_written_flags &
		CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
	*vlan_stripped = (bytes_written_flags &
		CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;

	/*
	 * Tag Control Information(16) = user_priority(3) + cfi(1) + vlan(12)
	 */
	*vlan_tci = le16_to_cpu(desc->vlan);

	if (*fcoe) {
		*fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
			CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
		*fcoe_fc_crc_ok = (desc->flags &
			CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
		*fcoe_enc_error = (desc->flags &
			CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
		*fcoe_eof = (u8)((le16_to_cpu(desc->checksum_fcoe) >>
			CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
			CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
		*checksum = 0;
	} else {
		*fcoe_sof = 0;
		*fcoe_fc_crc_ok = 0;
		*fcoe_enc_error = 0;
		*fcoe_eof = 0;
		*checksum = le16_to_cpu(desc->checksum_fcoe);
	}

	*tcp_udp_csum_ok =
		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
	*udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
	*tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
	*ipv4_csum_ok =
		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
	*ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
	*ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
	*ipv4_fragment =
		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
	*fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
}

#endif /* _CQ_ENET_DESC_H_ */