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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /* * Copyright (c) 2005 Cisco Systems. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * 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. * * $Id: ib_srp.h 3932 2005-11-01 17:19:29Z roland $ */ #ifndef IB_SRP_H #define IB_SRP_H #include <linux/types.h> #include <linux/list.h> #include <linux/mutex.h> #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> #include <rdma/ib_verbs.h> #include <rdma/ib_sa.h> #include <rdma/ib_cm.h> enum { SRP_PATH_REC_TIMEOUT_MS = 1000, SRP_ABORT_TIMEOUT_MS = 5000, SRP_PORT_REDIRECT = 1, SRP_DLID_REDIRECT = 2, SRP_MAX_LUN = 512, SRP_MAX_IU_LEN = 256, SRP_RQ_SHIFT = 6, SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, SRP_SQ_SIZE = SRP_RQ_SIZE - 1, SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE, SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1) }; #define SRP_OP_RECV (1 << 31) #define SRP_MAX_INDIRECT ((SRP_MAX_IU_LEN - \ sizeof (struct srp_cmd) - \ sizeof (struct srp_indirect_buf)) / 16) enum srp_target_state { SRP_TARGET_LIVE, SRP_TARGET_CONNECTING, SRP_TARGET_DEAD, SRP_TARGET_REMOVED }; struct srp_host { u8 initiator_port_id[16]; struct ib_device *dev; u8 port; struct ib_pd *pd; struct ib_mr *mr; struct class_device class_dev; struct list_head target_list; struct mutex target_mutex; struct completion released; struct list_head list; }; struct srp_request { struct list_head list; struct scsi_cmnd *scmnd; struct srp_iu *cmd; struct srp_iu *tsk_mgmt; DECLARE_PCI_UNMAP_ADDR(direct_mapping) struct completion done; short next; u8 cmd_done; u8 tsk_status; }; struct srp_target_port { __be64 id_ext; __be64 ioc_guid; __be64 service_id; struct srp_host *srp_host; struct Scsi_Host *scsi_host; char target_name[32]; unsigned int scsi_id; struct ib_sa_path_rec path; struct ib_sa_query *path_query; int path_query_id; struct ib_cm_id *cm_id; struct ib_cq *cq; struct ib_qp *qp; int max_ti_iu_len; s32 req_lim; unsigned rx_head; struct srp_iu *rx_ring[SRP_RQ_SIZE]; unsigned tx_head; unsigned tx_tail; struct srp_iu *tx_ring[SRP_SQ_SIZE + 1]; int req_head; struct list_head req_queue; struct srp_request req_ring[SRP_SQ_SIZE]; struct work_struct work; struct list_head list; struct completion done; int status; enum srp_target_state state; }; struct srp_iu { dma_addr_t dma; void *buf; size_t size; enum dma_data_direction direction; }; #endif /* IB_SRP_H */ |