diff options
Diffstat (limited to 'drivers/infiniband/ulp/srp/ib_srp.h')
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h new file mode 100644 index 00000000000..b564f18caf7 --- /dev/null +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -0,0 +1,151 @@ +/* + * 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 <asm/semaphore.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 semaphore 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 */ |