Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 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 | * $Id: ib_srp.h 3932 2005-11-01 17:19:29Z roland $ |
| 33 | */ |
| 34 | |
| 35 | #ifndef IB_SRP_H |
| 36 | #define IB_SRP_H |
| 37 | |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/list.h> |
Ingo Molnar | 8e9e5f4f | 2006-01-30 15:21:21 -0800 | [diff] [blame] | 40 | #include <linux/mutex.h> |
Roland Dreier | cf36871 | 2006-03-24 15:47:26 -0800 | [diff] [blame] | 41 | #include <linux/scatterlist.h> |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 42 | |
| 43 | #include <scsi/scsi_host.h> |
| 44 | #include <scsi/scsi_cmnd.h> |
| 45 | |
| 46 | #include <rdma/ib_verbs.h> |
| 47 | #include <rdma/ib_sa.h> |
| 48 | #include <rdma/ib_cm.h> |
Roland Dreier | f5358a1 | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 49 | #include <rdma/ib_fmr_pool.h> |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 50 | |
| 51 | enum { |
| 52 | SRP_PATH_REC_TIMEOUT_MS = 1000, |
| 53 | SRP_ABORT_TIMEOUT_MS = 5000, |
| 54 | |
| 55 | SRP_PORT_REDIRECT = 1, |
| 56 | SRP_DLID_REDIRECT = 2, |
| 57 | |
Roland Dreier | 5f06899 | 2005-11-11 14:06:01 -0800 | [diff] [blame] | 58 | SRP_MAX_LUN = 512, |
Vu Pham | 74b0a15 | 2006-06-17 20:37:32 -0700 | [diff] [blame] | 59 | SRP_DEF_SG_TABLESIZE = 12, |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 60 | |
| 61 | SRP_RQ_SHIFT = 6, |
| 62 | SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, |
| 63 | SRP_SQ_SIZE = SRP_RQ_SIZE - 1, |
| 64 | SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE, |
| 65 | |
Roland Dreier | f5358a1 | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 66 | SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), |
| 67 | |
| 68 | SRP_FMR_SIZE = 256, |
| 69 | SRP_FMR_POOL_SIZE = 1024, |
| 70 | SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 71 | }; |
| 72 | |
| 73 | #define SRP_OP_RECV (1 << 31) |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 74 | |
| 75 | enum srp_target_state { |
| 76 | SRP_TARGET_LIVE, |
| 77 | SRP_TARGET_CONNECTING, |
| 78 | SRP_TARGET_DEAD, |
| 79 | SRP_TARGET_REMOVED |
| 80 | }; |
| 81 | |
Roland Dreier | f5358a1 | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 82 | struct srp_device { |
| 83 | struct list_head dev_list; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 84 | struct ib_device *dev; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 85 | struct ib_pd *pd; |
| 86 | struct ib_mr *mr; |
Roland Dreier | f5358a1 | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 87 | struct ib_fmr_pool *fmr_pool; |
| 88 | int fmr_page_shift; |
| 89 | int fmr_page_size; |
| 90 | unsigned long fmr_page_mask; |
| 91 | }; |
| 92 | |
| 93 | struct srp_host { |
| 94 | u8 initiator_port_id[16]; |
| 95 | struct srp_device *dev; |
| 96 | u8 port; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 97 | struct class_device class_dev; |
| 98 | struct list_head target_list; |
Matthew Wilcox | b3589fd | 2006-06-17 20:37:30 -0700 | [diff] [blame] | 99 | spinlock_t target_lock; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 100 | struct completion released; |
| 101 | struct list_head list; |
| 102 | }; |
| 103 | |
| 104 | struct srp_request { |
| 105 | struct list_head list; |
| 106 | struct scsi_cmnd *scmnd; |
| 107 | struct srp_iu *cmd; |
| 108 | struct srp_iu *tsk_mgmt; |
Roland Dreier | f5358a1 | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 109 | struct ib_pool_fmr *fmr; |
Roland Dreier | cf36871 | 2006-03-24 15:47:26 -0800 | [diff] [blame] | 110 | /* |
| 111 | * Fake scatterlist used when scmnd->use_sg==0. Can be killed |
| 112 | * when the SCSI midlayer no longer generates non-SG commands. |
| 113 | */ |
| 114 | struct scatterlist fake_sg; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 115 | struct completion done; |
Roland Dreier | d945e1d | 2006-05-09 10:50:28 -0700 | [diff] [blame] | 116 | short index; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 117 | u8 cmd_done; |
| 118 | u8 tsk_status; |
| 119 | }; |
| 120 | |
| 121 | struct srp_target_port { |
| 122 | __be64 id_ext; |
| 123 | __be64 ioc_guid; |
| 124 | __be64 service_id; |
| 125 | struct srp_host *srp_host; |
| 126 | struct Scsi_Host *scsi_host; |
| 127 | char target_name[32]; |
| 128 | unsigned int scsi_id; |
| 129 | |
| 130 | struct ib_sa_path_rec path; |
| 131 | struct ib_sa_query *path_query; |
| 132 | int path_query_id; |
| 133 | |
| 134 | struct ib_cm_id *cm_id; |
| 135 | struct ib_cq *cq; |
| 136 | struct ib_qp *qp; |
| 137 | |
| 138 | int max_ti_iu_len; |
| 139 | s32 req_lim; |
| 140 | |
Roland Dreier | 6bfa24f | 2006-06-17 20:37:33 -0700 | [diff] [blame^] | 141 | int zero_req_lim; |
| 142 | |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 143 | unsigned rx_head; |
| 144 | struct srp_iu *rx_ring[SRP_RQ_SIZE]; |
| 145 | |
| 146 | unsigned tx_head; |
| 147 | unsigned tx_tail; |
| 148 | struct srp_iu *tx_ring[SRP_SQ_SIZE + 1]; |
| 149 | |
Roland Dreier | d945e1d | 2006-05-09 10:50:28 -0700 | [diff] [blame] | 150 | struct list_head free_reqs; |
Roland Dreier | aef9ec3 | 2005-11-02 14:07:13 -0800 | [diff] [blame] | 151 | struct list_head req_queue; |
| 152 | struct srp_request req_ring[SRP_SQ_SIZE]; |
| 153 | |
| 154 | struct work_struct work; |
| 155 | |
| 156 | struct list_head list; |
| 157 | struct completion done; |
| 158 | int status; |
| 159 | enum srp_target_state state; |
| 160 | }; |
| 161 | |
| 162 | struct srp_iu { |
| 163 | dma_addr_t dma; |
| 164 | void *buf; |
| 165 | size_t size; |
| 166 | enum dma_data_direction direction; |
| 167 | }; |
| 168 | |
| 169 | #endif /* IB_SRP_H */ |