1/* 2 * Copyright (c) 2005 Cisco Systems. 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 IB_SRP_H 34#define IB_SRP_H 35 36#include <linux/types.h> 37#include <linux/list.h> 38#include <linux/mutex.h> 39#include <linux/scatterlist.h> 40 41#include <scsi/scsi_host.h> 42#include <scsi/scsi_cmnd.h> 43 44#include <rdma/ib_verbs.h> 45#include <rdma/ib_sa.h> 46#include <rdma/ib_cm.h> 47#include <rdma/ib_fmr_pool.h> 48 49enum { 50 SRP_PATH_REC_TIMEOUT_MS = 1000, 51 SRP_ABORT_TIMEOUT_MS = 5000, 52 53 SRP_PORT_REDIRECT = 1, 54 SRP_DLID_REDIRECT = 2, 55 SRP_STALE_CONN = 3, 56 57 SRP_MAX_LUN = 512, 58 SRP_DEF_SG_TABLESIZE = 12, 59 60 SRP_RQ_SHIFT = 6, 61 SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, 62 SRP_SQ_SIZE = SRP_RQ_SIZE - 1, 63 64 SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), 65 66 SRP_FMR_SIZE = 256, 67 SRP_FMR_POOL_SIZE = 1024, 68 SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 69}; 70 71enum srp_target_state { 72 SRP_TARGET_LIVE, 73 SRP_TARGET_CONNECTING, 74 SRP_TARGET_DEAD, 75 SRP_TARGET_REMOVED 76}; 77 78enum srp_request_type { 79 SRP_REQ_NORMAL, 80 SRP_REQ_TASK_MGMT, 81}; 82 83struct srp_device { 84 struct list_head dev_list; 85 struct ib_device *dev; 86 struct ib_pd *pd; 87 struct ib_mr *mr; 88 struct ib_fmr_pool *fmr_pool; 89 int fmr_page_shift; 90 int fmr_page_size; 91 u64 fmr_page_mask; 92}; 93 94struct srp_host { 95 struct srp_device *srp_dev; 96 u8 port; 97 struct device dev; 98 struct list_head target_list; 99 spinlock_t target_lock; 100 struct completion released; 101 struct list_head list; 102}; 103 104struct srp_request { 105 struct list_head list; 106 struct scsi_cmnd *scmnd; 107 struct srp_iu *cmd; 108 struct srp_iu *tsk_mgmt; 109 struct ib_pool_fmr *fmr; 110 struct completion done; 111 short index; 112 u8 cmd_done; 113 u8 tsk_status; 114}; 115 116struct srp_target_port { 117 __be64 id_ext; 118 __be64 ioc_guid; 119 __be64 service_id; 120 __be64 initiator_ext; 121 u16 io_class; 122 struct srp_host *srp_host; 123 struct Scsi_Host *scsi_host; 124 char target_name[32]; 125 unsigned int scsi_id; 126 127 struct ib_sa_path_rec path; 128 __be16 orig_dgid[8]; 129 struct ib_sa_query *path_query; 130 int path_query_id; 131 132 struct ib_cm_id *cm_id; 133 struct ib_cq *recv_cq; 134 struct ib_cq *send_cq; 135 struct ib_qp *qp; 136 137 int max_ti_iu_len; 138 s32 req_lim; 139 140 int zero_req_lim; 141 142 unsigned rx_head; 143 struct srp_iu *rx_ring[SRP_RQ_SIZE]; 144 145 unsigned tx_head; 146 unsigned tx_tail; 147 struct srp_iu *tx_ring[SRP_SQ_SIZE + 1]; 148 149 struct list_head free_reqs; 150 struct list_head req_queue; 151 struct srp_request req_ring[SRP_SQ_SIZE]; 152 153 struct work_struct work; 154 155 struct list_head list; 156 struct completion done; 157 int status; 158 enum srp_target_state state; 159 int qp_in_error; 160}; 161 162struct srp_iu { 163 u64 dma; 164 void *buf; 165 size_t size; 166 enum dma_data_direction direction; 167}; 168 169#endif /* IB_SRP_H */ 170