| /* |
| * 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. |
| */ |
| |
| #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_STALE_CONN = 3, |
| |
| 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, |
| SRP_RSP_SQ_SIZE = 1, |
| SRP_REQ_SQ_SIZE = SRP_SQ_SIZE - SRP_RSP_SQ_SIZE, |
| SRP_TSK_MGMT_SQ_SIZE = 1, |
| SRP_CMD_SQ_SIZE = SRP_REQ_SQ_SIZE - SRP_TSK_MGMT_SQ_SIZE, |
| |
| SRP_TAG_NO_REQ = ~0U, |
| SRP_TAG_TSK_MGMT = 1U << 31, |
| |
| SRP_FMR_SIZE = 256, |
| SRP_FMR_POOL_SIZE = 1024, |
| SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 |
| }; |
| |
| enum srp_target_state { |
| SRP_TARGET_LIVE, |
| SRP_TARGET_CONNECTING, |
| SRP_TARGET_DEAD, |
| SRP_TARGET_REMOVED |
| }; |
| |
| enum srp_iu_type { |
| SRP_IU_CMD, |
| SRP_IU_TSK_MGMT, |
| SRP_IU_RSP, |
| }; |
| |
| 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 *srp_dev; |
| u8 port; |
| struct device 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 ib_pool_fmr *fmr; |
| short index; |
| }; |
| |
| struct srp_target_port { |
| /* These are RW in the hot path, and commonly used together */ |
| struct list_head free_tx; |
| struct list_head free_reqs; |
| spinlock_t lock; |
| s32 req_lim; |
| |
| /* These are read-only in the hot path */ |
| struct ib_cq *send_cq ____cacheline_aligned_in_smp; |
| struct ib_cq *recv_cq; |
| struct ib_qp *qp; |
| u32 lkey; |
| u32 rkey; |
| enum srp_target_state state; |
| unsigned int max_iu_len; |
| unsigned int cmd_sg_cnt; |
| |
| /* Everything above this point is used in the hot path of |
| * command processing. Try to keep them packed into cachelines. |
| */ |
| |
| __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; |
| __be16 orig_dgid[8]; |
| struct ib_sa_query *path_query; |
| int path_query_id; |
| |
| struct ib_cm_id *cm_id; |
| |
| int max_ti_iu_len; |
| |
| int zero_req_lim; |
| |
| struct srp_iu *tx_ring[SRP_SQ_SIZE]; |
| struct srp_iu *rx_ring[SRP_RQ_SIZE]; |
| struct srp_request req_ring[SRP_CMD_SQ_SIZE]; |
| |
| struct work_struct work; |
| |
| struct list_head list; |
| struct completion done; |
| int status; |
| int qp_in_error; |
| |
| struct completion tsk_mgmt_done; |
| u8 tsk_mgmt_status; |
| }; |
| |
| struct srp_iu { |
| struct list_head list; |
| u64 dma; |
| void *buf; |
| size_t size; |
| enum dma_data_direction direction; |
| }; |
| |
| #endif /* IB_SRP_H */ |