/* * 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 <linux/scatterlist.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> #include <rdma/ib_fmr_pool.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_DEF_SG_TABLESIZE = 12, 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), SRP_FMR_SIZE = 256, SRP_FMR_POOL_SIZE = 1024, SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 }; #define SRP_OP_RECV (1 << 31) enum srp_target_state { SRP_TARGET_LIVE, SRP_TARGET_CONNECTING, SRP_TARGET_DEAD, SRP_TARGET_REMOVED }; struct srp_device { struct list_head dev_list; struct ib_device *dev; struct ib_pd *pd; struct ib_mr *mr; struct ib_fmr_pool *fmr_pool; int fmr_page_shift; int fmr_page_size; u64 fmr_page_mask; }; struct srp_host { struct srp_device *dev; u8 port; struct class_device class_dev; struct list_head target_list; spinlock_t target_lock; 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; struct ib_pool_fmr *fmr; /* * Fake scatterlist used when scmnd->use_sg==0. Can be killed * when the SCSI midlayer no longer generates non-SG commands. */ struct scatterlist fake_sg; struct completion done; short index; u8 cmd_done; u8 tsk_status; }; struct srp_target_port { __be64 id_ext; __be64 ioc_guid; __be64 service_id; __be64 initiator_ext; u16 io_class; 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; int zero_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]; struct list_head free_reqs; 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 { u64 dma; void *buf; size_t size; enum dma_data_direction direction; }; #endif /* IB_SRP_H */