EVOLUTION-MANAGER

Edit File: fc_fcp.h

/* * Copyright(c) 2007 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * * Maintained at www.Open-FCoE.org */ #ifndef _FC_FCP_H_ #define _FC_FCP_H_ #include <scsi/scsi.h> /* * Fibre Channel Protocol for SCSI. * From T10 FCP-3, T10 project 1560-D Rev 4, Sept. 13, 2005. */ /* * fc/fs.h defines FC_TYPE_FCP. */ /* * Service parameter page parameters (word 3 bits) for Process Login. */ #define FCP_SPPF_TASK_RETRY_ID 0x0200 /* task retry ID requested */ #define FCP_SPPF_RETRY 0x0100 /* retry supported */ #define FCP_SPPF_CONF_COMPL 0x0080 /* confirmed completion allowed */ #define FCP_SPPF_OVLY_ALLOW 0x0040 /* data overlay allowed */ #define FCP_SPPF_INIT_FCN 0x0020 /* initiator function */ #define FCP_SPPF_TARG_FCN 0x0010 /* target function */ #define FCP_SPPF_RD_XRDY_DIS 0x0002 /* disable XFER_RDY for reads */ #define FCP_SPPF_WR_XRDY_DIS 0x0001 /* disable XFER_RDY for writes */ /* * FCP_CMND IU Payload. */ struct fcp_cmnd { struct scsi_lun fc_lun; /* logical unit number */ __u8 fc_cmdref; /* command reference number */ __u8 fc_pri_ta; /* priority and task attribute */ __u8 fc_tm_flags; /* task management flags */ __u8 fc_flags; /* additional len & flags */ __u8 fc_cdb[16]; /* base CDB */ __be32 fc_dl; /* data length (must follow fc_cdb) */ }; #define FCP_CMND_LEN 32 /* expected length of structure */ struct fcp_cmnd32 { struct scsi_lun fc_lun; /* logical unit number */ __u8 fc_cmdref; /* command reference number */ __u8 fc_pri_ta; /* priority and task attribute */ __u8 fc_tm_flags; /* task management flags */ __u8 fc_flags; /* additional len & flags */ __u8 fc_cdb[32]; /* base CDB */ __be32 fc_dl; /* data length (must follow fc_cdb) */ }; #define FCP_CMND32_LEN 48 /* expected length of structure */ #define FCP_CMND32_ADD_LEN (16 / 4) /* Additional cdb length */ /* * fc_pri_ta. */ #define FCP_PTA_SIMPLE 0 /* simple task attribute */ #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ #define FCP_PTA_ORDERED 2 /* ordered task attribute */ #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ #define FCP_PTA_MASK 7 /* mask for task attribute field */ #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ /* * fc_tm_flags - task management flags field. */ #define FCP_TMF_CLR_ACA 0x40 /* clear ACA condition */ #define FCP_TMF_TGT_RESET 0x20 /* target reset task management, deprecated as of FCP-3 */ #define FCP_TMF_LUN_RESET 0x10 /* logical unit reset task management */ #define FCP_TMF_CLR_TASK_SET 0x04 /* clear task set */ #define FCP_TMF_ABT_TASK_SET 0x02 /* abort task set */ /* * fc_flags. * Bits 7:2 are the additional FCP_CDB length / 4. */ #define FCP_CFL_LEN_MASK 0xfc /* mask for additional length */ #define FCP_CFL_LEN_SHIFT 2 /* shift bits for additional length */ #define FCP_CFL_RDDATA 0x02 /* read data */ #define FCP_CFL_WRDATA 0x01 /* write data */ /* * FCP_TXRDY IU - transfer ready payload. */ struct fcp_txrdy { __be32 ft_data_ro; /* data relative offset */ __be32 ft_burst_len; /* burst length */ __u8 _ft_resvd[4]; /* reserved */ }; #define FCP_TXRDY_LEN 12 /* expected length of structure */ /* * FCP_RESP IU - response payload. * * The response payload comes in three parts: the flags/status, the * sense/response lengths and the sense data/response info section. * * From FCP3r04, note 6 of section 9.5.13: * * Some early implementations presented the FCP_RSP IU without the FCP_RESID, * FCP_SNS_LEN, and FCP_RSP_LEN fields if the FCP_RESID_UNDER, FCP_RESID_OVER, * FCP_SNS_LEN_VALID, and FCP_RSP_LEN_VALID bits were all set to zero. This * non-standard behavior should be tolerated. * * All response frames will always contain the fcp_resp template. Some * will also include the fcp_resp_len template. * * From Table 23, the FCP_RSP_INFO can either be 4 bytes or 8 bytes, both * are valid length. */ struct fcp_resp { __u8 _fr_resvd[8]; /* reserved */ __be16 fr_retry_delay; /* retry delay timer */ __u8 fr_flags; /* flags */ __u8 fr_status; /* SCSI status code */ }; #define FCP_RESP_LEN 12 /* expected length of structure */ struct fcp_resp_ext { __be32 fr_resid; /* Residual value */ __be32 fr_sns_len; /* SCSI Sense length */ __be32 fr_rsp_len; /* Response Info length */ /* * Optionally followed by RSP info and/or SNS info and/or * bidirectional read residual length, if any. */ }; #define FCP_RESP_EXT_LEN 12 /* expected length of the structure */ struct fcp_resp_rsp_info { __u8 _fr_resvd[3]; /* reserved */ __u8 rsp_code; /* Response Info Code */ __u8 _fr_resvd2[4]; /* reserved */ }; #define FCP_RESP_RSP_INFO_LEN4 4 /* without reserved field */ #define FCP_RESP_RSP_INFO_LEN8 8 /* with reserved field */ struct fcp_resp_with_ext { struct fcp_resp resp; struct fcp_resp_ext ext; }; #define FCP_RESP_WITH_EXT (FCP_RESP_LEN + FCP_RESP_EXT_LEN) /* * fr_flags. */ #define FCP_BIDI_RSP 0x80 /* bidirectional read response */ #define FCP_BIDI_READ_UNDER 0x40 /* bidir. read less than requested */ #define FCP_BIDI_READ_OVER 0x20 /* DL insufficient for full transfer */ #define FCP_CONF_REQ 0x10 /* confirmation requested */ #define FCP_RESID_UNDER 0x08 /* transfer shorter than expected */ #define FCP_RESID_OVER 0x04 /* DL insufficient for full transfer */ #define FCP_SNS_LEN_VAL 0x02 /* SNS_LEN field is valid */ #define FCP_RSP_LEN_VAL 0x01 /* RSP_LEN field is valid */ /* * rsp_codes */ enum fcp_resp_rsp_codes { FCP_TMF_CMPL = 0, FCP_DATA_LEN_INVALID = 1, FCP_CMND_FIELDS_INVALID = 2, FCP_DATA_PARAM_MISMATCH = 3, FCP_TMF_REJECTED = 4, FCP_TMF_FAILED = 5, FCP_TMF_INVALID_LUN = 9, }; /* * FCP SRR Link Service request - Sequence Retransmission Request. */ struct fcp_srr { __u8 srr_op; /* opcode ELS_SRR */ __u8 srr_resvd[3]; /* opcode / reserved - must be zero */ __be16 srr_ox_id; /* OX_ID of failed command */ __be16 srr_rx_id; /* RX_ID of failed command */ __be32 srr_rel_off; /* relative offset */ __u8 srr_r_ctl; /* r_ctl for the information unit */ __u8 srr_resvd2[3]; /* reserved */ }; /* * Feature bits in name server FC-4 Features object. */ #define FCP_FEAT_TARG (1 << 0) /* target function supported */ #define FCP_FEAT_INIT (1 << 1) /* initiator function supported */ #endif /* _FC_FCP_H_ */