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yaml --- r: 173751 b: refs/heads/master c: 4318e08 h: refs/heads/master i: 173749: 31a0d96 173747: f438b44 173743: 990200a v: v3
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Christof Schmitt
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James Bottomley
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Dec 4, 2009
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 8830271c4819d86d8e87202a1fe8da0bb58912a2 | ||
| refs/heads/master: 4318e08c84e4916ac463002ffb7f9901ddb3c385 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| /* | ||
| * zfcp device driver | ||
| * | ||
| * Fibre Channel related definitions and inline functions for the zfcp | ||
| * device driver | ||
| * | ||
| * Copyright IBM Corporation 2009 | ||
| */ | ||
|
|
||
| #ifndef ZFCP_FC_H | ||
| #define ZFCP_FC_H | ||
|
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||
| #include <scsi/fc/fc_fcp.h> | ||
| #include <scsi/scsi_cmnd.h> | ||
| #include <scsi/scsi_tcq.h> | ||
|
|
||
| /** | ||
| * zfcp_fc_scsi_to_fcp - setup FCP command with data from scsi_cmnd | ||
| * @fcp: fcp_cmnd to setup | ||
| * @scsi: scsi_cmnd where to get LUN, task attributes/flags and CDB | ||
| */ | ||
| static inline | ||
| void zfcp_fc_scsi_to_fcp(struct fcp_cmnd *fcp, struct scsi_cmnd *scsi) | ||
| { | ||
| char tag[2]; | ||
|
|
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| int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun); | ||
|
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| if (scsi_populate_tag_msg(scsi, tag)) { | ||
| switch (tag[0]) { | ||
| case MSG_ORDERED_TAG: | ||
| fcp->fc_pri_ta |= FCP_PTA_ORDERED; | ||
| break; | ||
| case MSG_SIMPLE_TAG: | ||
| fcp->fc_pri_ta |= FCP_PTA_SIMPLE; | ||
| break; | ||
| }; | ||
| } else | ||
| fcp->fc_pri_ta = FCP_PTA_SIMPLE; | ||
|
|
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| if (scsi->sc_data_direction == DMA_FROM_DEVICE) | ||
| fcp->fc_flags |= FCP_CFL_RDDATA; | ||
| if (scsi->sc_data_direction == DMA_TO_DEVICE) | ||
| fcp->fc_flags |= FCP_CFL_WRDATA; | ||
|
|
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| memcpy(fcp->fc_cdb, scsi->cmnd, scsi->cmd_len); | ||
|
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| fcp->fc_dl = scsi_bufflen(scsi); | ||
| } | ||
|
|
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| /** | ||
| * zfcp_fc_fcp_tm - setup FCP command as task management command | ||
| * @fcp: fcp_cmnd to setup | ||
| * @dev: scsi_device where to send the task management command | ||
| * @tm: task management flags to setup tm command | ||
| */ | ||
| static inline | ||
| void zfcp_fc_fcp_tm(struct fcp_cmnd *fcp, struct scsi_device *dev, u8 tm_flags) | ||
| { | ||
| int_to_scsilun(dev->lun, (struct scsi_lun *) &fcp->fc_lun); | ||
| fcp->fc_tm_flags |= tm_flags; | ||
| } | ||
|
|
||
| /** | ||
| * zfcp_fc_evap_fcp_rsp - evaluate FCP RSP IU and update scsi_cmnd accordingly | ||
| * @fcp_rsp: FCP RSP IU to evaluate | ||
| * @scsi: SCSI command where to update status and sense buffer | ||
| */ | ||
| static inline | ||
| void zfcp_fc_eval_fcp_rsp(struct fcp_resp_with_ext *fcp_rsp, | ||
| struct scsi_cmnd *scsi) | ||
| { | ||
| struct fcp_resp_rsp_info *rsp_info; | ||
| char *sense; | ||
| u32 sense_len, resid; | ||
| u8 rsp_flags; | ||
|
|
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| set_msg_byte(scsi, COMMAND_COMPLETE); | ||
| scsi->result |= fcp_rsp->resp.fr_status; | ||
|
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| rsp_flags = fcp_rsp->resp.fr_flags; | ||
|
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| if (unlikely(rsp_flags & FCP_RSP_LEN_VAL)) { | ||
| rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; | ||
| if (rsp_info->rsp_code == FCP_TMF_CMPL) | ||
| set_host_byte(scsi, DID_OK); | ||
| else { | ||
| set_host_byte(scsi, DID_ERROR); | ||
| return; | ||
| } | ||
| } | ||
|
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| if (unlikely(rsp_flags & FCP_SNS_LEN_VAL)) { | ||
| sense = (char *) &fcp_rsp[1]; | ||
| if (rsp_flags & FCP_RSP_LEN_VAL) | ||
| sense += fcp_rsp->ext.fr_sns_len; | ||
| sense_len = min(fcp_rsp->ext.fr_sns_len, | ||
| (u32) SCSI_SENSE_BUFFERSIZE); | ||
| memcpy(scsi->sense_buffer, sense, sense_len); | ||
| } | ||
|
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| if (unlikely(rsp_flags & FCP_RESID_UNDER)) { | ||
| resid = fcp_rsp->ext.fr_resid; | ||
| scsi_set_resid(scsi, resid); | ||
| if (scsi_bufflen(scsi) - resid < scsi->underflow && | ||
| !(rsp_flags & FCP_SNS_LEN_VAL) && | ||
| fcp_rsp->resp.fr_status == SAM_STAT_GOOD) | ||
| set_host_byte(scsi, DID_ERROR); | ||
| } | ||
| } | ||
|
|
||
| #endif |
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