diff options
Diffstat (limited to 'drivers/scsi/qedi/qedi_iscsi.h')
| -rw-r--r-- | drivers/scsi/qedi/qedi_iscsi.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/drivers/scsi/qedi/qedi_iscsi.h b/drivers/scsi/qedi/qedi_iscsi.h new file mode 100644 index 000000000000..d3c06bbddb4e --- /dev/null +++ b/drivers/scsi/qedi/qedi_iscsi.h @@ -0,0 +1,232 @@ +/* + * QLogic iSCSI Offload Driver + * Copyright (c) 2016 Cavium Inc. + * + * This software is available 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. + */ + +#ifndef _QEDI_ISCSI_H_ +#define _QEDI_ISCSI_H_ + +#include <linux/socket.h> +#include <linux/completion.h> +#include "qedi.h" + +#define ISCSI_MAX_SESS_PER_HBA 4096 + +#define DEF_KA_TIMEOUT 7200000 +#define DEF_KA_INTERVAL 10000 +#define DEF_KA_MAX_PROBE_COUNT 10 +#define DEF_TOS 0 +#define DEF_TTL 0xfe +#define DEF_SND_SEQ_SCALE 0 +#define DEF_RCV_BUF 0xffff +#define DEF_SND_BUF 0xffff +#define DEF_SEED 0 +#define DEF_MAX_RT_TIME 8000 +#define DEF_MAX_DA_COUNT 2 +#define DEF_SWS_TIMER 1000 +#define DEF_MAX_CWND 2 +#define DEF_PATH_MTU 1500 +#define DEF_MSS 1460 +#define DEF_LL2_MTU 1560 +#define JUMBO_MTU 9000 + +#define MIN_MTU 576 /* rfc 793 */ +#define IPV4_HDR_LEN 20 +#define IPV6_HDR_LEN 40 +#define TCP_HDR_LEN 20 +#define TCP_OPTION_LEN 12 +#define VLAN_LEN 4 + +enum { + EP_STATE_IDLE = 0x0, + EP_STATE_ACQRCONN_START = 0x1, + EP_STATE_ACQRCONN_COMPL = 0x2, + EP_STATE_OFLDCONN_START = 0x4, + EP_STATE_OFLDCONN_COMPL = 0x8, + EP_STATE_DISCONN_START = 0x10, + EP_STATE_DISCONN_COMPL = 0x20, + EP_STATE_CLEANUP_START = 0x40, + EP_STATE_CLEANUP_CMPL = 0x80, + EP_STATE_TCP_FIN_RCVD = 0x100, + EP_STATE_TCP_RST_RCVD = 0x200, + EP_STATE_LOGOUT_SENT = 0x400, + EP_STATE_LOGOUT_RESP_RCVD = 0x800, + EP_STATE_CLEANUP_FAILED = 0x1000, + EP_STATE_OFLDCONN_FAILED = 0x2000, + EP_STATE_CONNECT_FAILED = 0x4000, + EP_STATE_DISCONN_TIMEDOUT = 0x8000, +}; + +struct qedi_conn; + +struct qedi_endpoint { + struct qedi_ctx *qedi; + u32 dst_addr[4]; + u32 src_addr[4]; + u16 src_port; + u16 dst_port; + u16 vlan_id; + u16 pmtu; + u8 src_mac[ETH_ALEN]; + u8 dst_mac[ETH_ALEN]; + u8 ip_type; + int state; + wait_queue_head_t ofld_wait; + wait_queue_head_t tcp_ofld_wait; + u32 iscsi_cid; + /* identifier of the connection from qed */ + u32 handle; + u32 fw_cid; + void __iomem *p_doorbell; + + /* Send queue management */ + struct iscsi_wqe *sq; + dma_addr_t sq_dma; + + u16 sq_prod_idx; + u16 fw_sq_prod_idx; + u16 sq_con_idx; + u32 sq_mem_size; + + void *sq_pbl; + dma_addr_t sq_pbl_dma; + u32 sq_pbl_size; + struct qedi_conn *conn; + struct work_struct offload_work; +}; + +#define QEDI_SQ_WQES_MIN 16 + +struct qedi_io_bdt { + struct iscsi_sge *sge_tbl; + dma_addr_t sge_tbl_dma; + u16 sge_valid; +}; + +/** + * struct generic_pdu_resc - login pdu resource structure + * + * @req_buf: driver buffer used to stage payload associated with + * the login request + * @req_dma_addr: dma address for iscsi login request payload buffer + * @req_buf_size: actual login request payload length + * @req_wr_ptr: pointer into login request buffer when next data is + * to be written + * @resp_hdr: iscsi header where iscsi login response header is to + * be recreated + * @resp_buf: buffer to stage login response payload + * @resp_dma_addr: login response payload buffer dma address + * @resp_buf_size: login response paylod length + * @resp_wr_ptr: pointer into login response buffer when next data is + * to be written + * @req_bd_tbl: iscsi login request payload BD table + * @req_bd_dma: login request BD table dma address + * @resp_bd_tbl: iscsi login response payload BD table + * @resp_bd_dma: login request BD table dma address + * + * following structure defines buffer info for generic pdus such as iSCSI Login, + * Logout and NOP + */ +struct generic_pdu_resc { + char *req_buf; + dma_addr_t req_dma_addr; + u32 req_buf_size; + char *req_wr_ptr; + struct iscsi_hdr resp_hdr; + char *resp_buf; + dma_addr_t resp_dma_addr; + u32 resp_buf_size; + char *resp_wr_ptr; + char *req_bd_tbl; + dma_addr_t req_bd_dma; + char *resp_bd_tbl; + dma_addr_t resp_bd_dma; +}; + +struct qedi_conn { + struct iscsi_cls_conn *cls_conn; + struct qedi_ctx *qedi; + struct qedi_endpoint *ep; + struct list_head active_cmd_list; + spinlock_t list_lock; /* internal conn lock */ + u32 active_cmd_count; + u32 cmd_cleanup_req; + u32 cmd_cleanup_cmpl; + + u32 iscsi_conn_id; + int itt; + int abrt_conn; +#define QEDI_CID_RESERVED 0x5AFF + u32 fw_cid; + /* + * Buffer for login negotiation process + */ + struct generic_pdu_resc gen_pdu; + + struct list_head tmf_work_list; + wait_queue_head_t wait_queue; + spinlock_t tmf_work_lock; /* tmf work lock */ + unsigned long flags; +#define QEDI_CONN_FW_CLEANUP 1 +}; + +struct qedi_cmd { + struct list_head io_cmd; + bool io_cmd_in_list; + struct iscsi_hdr hdr; + struct qedi_conn *conn; + struct scsi_cmnd *scsi_cmd; + struct scatterlist *sg; + struct qedi_io_bdt io_tbl; + struct iscsi_task_context request; + unsigned char *sense_buffer; + dma_addr_t sense_buffer_dma; + u16 task_id; + + /* field populated for tmf work queue */ + struct iscsi_task *task; + struct work_struct tmf_work; + int state; +#define CLEANUP_WAIT 1 +#define CLEANUP_RECV 2 +#define CLEANUP_WAIT_FAILED 3 +#define CLEANUP_NOT_REQUIRED 4 +#define LUN_RESET_RESPONSE_RECEIVED 5 +#define RESPONSE_RECEIVED 6 + + int type; +#define TYPEIO 1 +#define TYPERESET 2 + + struct qedi_work_map *list_tmf_work; + /* slowpath management */ + bool use_slowpath; + + struct iscsi_tm_rsp *tmf_resp_buf; + struct qedi_work cqe_work; +}; + +struct qedi_work_map { + struct list_head list; + struct qedi_cmd *qedi_cmd; + int rtid; + + int state; +#define QEDI_WORK_QUEUED 1 +#define QEDI_WORK_SCHEDULED 2 +#define QEDI_WORK_EXIT 3 + + struct work_struct *ptr_tmf_work; +}; + +#define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16))) +#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16) + +#define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \ + (q)->state == EP_STATE_OFLDCONN_COMPL) + +#endif /* _QEDI_ISCSI_H_ */ |