/include/linux/mlx4/cq.h

  1/*
  2 * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
  3 *
  4 * This software is available to you under a choice of one of two
  5 * licenses.  You may choose to be licensed under the terms of the GNU
  6 * General Public License (GPL) Version 2, available from the file
  7 * COPYING in the main directory of this source tree, or the
  8 * OpenIB.org BSD license below:
  9 *
 10 *     Redistribution and use in source and binary forms, with or
 11 *     without modification, are permitted provided that the following
 12 *     conditions are met:
 13 *
 14 *	- Redistributions of source code must retain the above
 15 *	  copyright notice, this list of conditions and the following
 16 *	  disclaimer.
 17 *
 18 *	- Redistributions in binary form must reproduce the above
 19 *	  copyright notice, this list of conditions and the following
 20 *	  disclaimer in the documentation and/or other materials
 21 *	  provided with the distribution.
 22 *
 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30 * SOFTWARE.
 31 */
 32
 33#ifndef MLX4_CQ_H
 34#define MLX4_CQ_H
 35
 36#include <linux/types.h>
 37
 38#include <linux/mlx4/device.h>
 39#include <linux/mlx4/doorbell.h>
 40
 41struct mlx4_cqe {
 42	__be32			vlan_my_qpn;
 43	__be32			immed_rss_invalid;
 44	__be32			g_mlpath_rqpn;
 45	__be16			sl_vid;
 46	__be16			rlid;
 47	__be16			status;
 48	u8			ipv6_ext_mask;
 49	u8			badfcs_enc;
 50	__be32			byte_cnt;
 51	__be16			wqe_index;
 52	__be16			checksum;
 53	u8			reserved[3];
 54	u8			owner_sr_opcode;
 55};
 56
 57struct mlx4_err_cqe {
 58	__be32			my_qpn;
 59	u32			reserved1[5];
 60	__be16			wqe_index;
 61	u8			vendor_err_syndrome;
 62	u8			syndrome;
 63	u8			reserved2[3];
 64	u8			owner_sr_opcode;
 65};
 66
 67enum {
 68	MLX4_CQE_VLAN_PRESENT_MASK	= 1 << 29,
 69	MLX4_CQE_QPN_MASK		= 0xffffff,
 70};
 71
 72enum {
 73	MLX4_CQE_OWNER_MASK	= 0x80,
 74	MLX4_CQE_IS_SEND_MASK	= 0x40,
 75	MLX4_CQE_OPCODE_MASK	= 0x1f
 76};
 77
 78enum {
 79	MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR		= 0x01,
 80	MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR		= 0x02,
 81	MLX4_CQE_SYNDROME_LOCAL_PROT_ERR		= 0x04,
 82	MLX4_CQE_SYNDROME_WR_FLUSH_ERR			= 0x05,
 83	MLX4_CQE_SYNDROME_MW_BIND_ERR			= 0x06,
 84	MLX4_CQE_SYNDROME_BAD_RESP_ERR			= 0x10,
 85	MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR		= 0x11,
 86	MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR		= 0x12,
 87	MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR		= 0x13,
 88	MLX4_CQE_SYNDROME_REMOTE_OP_ERR			= 0x14,
 89	MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR	= 0x15,
 90	MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR		= 0x16,
 91	MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR		= 0x22,
 92};
 93
 94enum {
 95	MLX4_CQE_STATUS_IPV4		= 1 << 6,
 96	MLX4_CQE_STATUS_IPV4F		= 1 << 7,
 97	MLX4_CQE_STATUS_IPV6		= 1 << 8,
 98	MLX4_CQE_STATUS_IPV4OPT		= 1 << 9,
 99	MLX4_CQE_STATUS_TCP		= 1 << 10,
100	MLX4_CQE_STATUS_UDP		= 1 << 11,
101	MLX4_CQE_STATUS_IPOK		= 1 << 12,
102};
103
104enum {
105	MLX4_CQE_LLC                     = 1,
106	MLX4_CQE_SNAP                    = 1 << 1,
107	MLX4_CQE_BAD_FCS                 = 1 << 4,
108};
109
110static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
111			       void __iomem *uar_page,
112			       spinlock_t *doorbell_lock)
113{
114	__be32 doorbell[2];
115	u32 sn;
116	u32 ci;
117
118	sn = cq->arm_sn & 3;
119	ci = cq->cons_index & 0xffffff;
120
121	*cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
122
123	/*
124	 * Make sure that the doorbell record in host memory is
125	 * written before ringing the doorbell via PCI MMIO.
126	 */
127	wmb();
128
129	doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
130	doorbell[1] = cpu_to_be32(ci);
131
132	mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
133}
134
135static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
136{
137	*cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
138}
139
140enum {
141	MLX4_CQ_DB_REQ_NOT_SOL		= 1 << 24,
142	MLX4_CQ_DB_REQ_NOT		= 2 << 24
143};
144
145int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq,
146		   u16 count, u16 period);
147int mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq,
148		   int entries, struct mlx4_mtt *mtt);
149
150#endif /* MLX4_CQ_H */