mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
315 lines
8.7 KiB
315 lines
8.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* |
|
* zfcp device driver |
|
* |
|
* Fibre Channel related definitions and inline functions for the zfcp |
|
* device driver |
|
* |
|
* Copyright IBM Corp. 2009, 2017 |
|
*/ |
|
|
|
#ifndef ZFCP_FC_H |
|
#define ZFCP_FC_H |
|
|
|
#include <scsi/fc/fc_els.h> |
|
#include <scsi/fc/fc_fcp.h> |
|
#include <scsi/fc/fc_ns.h> |
|
#include <scsi/scsi_cmnd.h> |
|
#include <scsi/scsi_tcq.h> |
|
#include "zfcp_fsf.h" |
|
|
|
#define ZFCP_FC_CT_SIZE_PAGE (PAGE_SIZE - sizeof(struct fc_ct_hdr)) |
|
#define ZFCP_FC_GPN_FT_ENT_PAGE (ZFCP_FC_CT_SIZE_PAGE \ |
|
/ sizeof(struct fc_gpn_ft_resp)) |
|
#define ZFCP_FC_GPN_FT_NUM_BUFS 4 /* memory pages */ |
|
|
|
#define ZFCP_FC_GPN_FT_MAX_SIZE (ZFCP_FC_GPN_FT_NUM_BUFS * PAGE_SIZE \ |
|
- sizeof(struct fc_ct_hdr)) |
|
#define ZFCP_FC_GPN_FT_MAX_ENT (ZFCP_FC_GPN_FT_NUM_BUFS * \ |
|
(ZFCP_FC_GPN_FT_ENT_PAGE + 1)) |
|
|
|
#define ZFCP_FC_CTELS_TMO (2 * FC_DEF_R_A_TOV / 1000) |
|
|
|
/** |
|
* struct zfcp_fc_event - FC HBAAPI event for internal queueing from irq context |
|
* @code: Event code |
|
* @data: Event data |
|
* @list: list_head for zfcp_fc_events list |
|
*/ |
|
struct zfcp_fc_event { |
|
enum fc_host_event_code code; |
|
u32 data; |
|
struct list_head list; |
|
}; |
|
|
|
/** |
|
* struct zfcp_fc_events - Infrastructure for posting FC events from irq context |
|
* @list: List for queueing of events from irq context to workqueue |
|
* @list_lock: Lock for event list |
|
* @work: work_struct for forwarding events in workqueue |
|
*/ |
|
struct zfcp_fc_events { |
|
struct list_head list; |
|
spinlock_t list_lock; |
|
struct work_struct work; |
|
}; |
|
|
|
/** |
|
* struct zfcp_fc_gid_pn_req - container for ct header plus gid_pn request |
|
* @ct_hdr: FC GS common transport header |
|
* @gid_pn: GID_PN request |
|
*/ |
|
struct zfcp_fc_gid_pn_req { |
|
struct fc_ct_hdr ct_hdr; |
|
struct fc_ns_gid_pn gid_pn; |
|
} __packed; |
|
|
|
/** |
|
* struct zfcp_fc_gid_pn_rsp - container for ct header plus gid_pn response |
|
* @ct_hdr: FC GS common transport header |
|
* @gid_pn: GID_PN response |
|
*/ |
|
struct zfcp_fc_gid_pn_rsp { |
|
struct fc_ct_hdr ct_hdr; |
|
struct fc_gid_pn_resp gid_pn; |
|
} __packed; |
|
|
|
/** |
|
* struct zfcp_fc_gpn_ft - container for ct header plus gpn_ft request |
|
* @ct_hdr: FC GS common transport header |
|
* @gpn_ft: GPN_FT request |
|
*/ |
|
struct zfcp_fc_gpn_ft_req { |
|
struct fc_ct_hdr ct_hdr; |
|
struct fc_ns_gid_ft gpn_ft; |
|
} __packed; |
|
|
|
/** |
|
* struct zfcp_fc_gspn_req - container for ct header plus GSPN_ID request |
|
* @ct_hdr: FC GS common transport header |
|
* @gspn: GSPN_ID request |
|
*/ |
|
struct zfcp_fc_gspn_req { |
|
struct fc_ct_hdr ct_hdr; |
|
struct fc_gid_pn_resp gspn; |
|
} __packed; |
|
|
|
/** |
|
* struct zfcp_fc_gspn_rsp - container for ct header plus GSPN_ID response |
|
* @ct_hdr: FC GS common transport header |
|
* @gspn: GSPN_ID response |
|
* @name: The name string of the GSPN_ID response |
|
*/ |
|
struct zfcp_fc_gspn_rsp { |
|
struct fc_ct_hdr ct_hdr; |
|
struct fc_gspn_resp gspn; |
|
char name[FC_SYMBOLIC_NAME_SIZE]; |
|
} __packed; |
|
|
|
/** |
|
* struct zfcp_fc_rspn_req - container for ct header plus RSPN_ID request |
|
* @ct_hdr: FC GS common transport header |
|
* @rspn: RSPN_ID request |
|
* @name: The name string of the RSPN_ID request |
|
*/ |
|
struct zfcp_fc_rspn_req { |
|
struct fc_ct_hdr ct_hdr; |
|
struct fc_ns_rspn rspn; |
|
char name[FC_SYMBOLIC_NAME_SIZE]; |
|
} __packed; |
|
|
|
/** |
|
* struct zfcp_fc_req - Container for FC ELS and CT requests sent from zfcp |
|
* @ct_els: data required for issuing fsf command |
|
* @sg_req: scatterlist entry for request data, refers to embedded @u submember |
|
* @sg_rsp: scatterlist entry for response data, refers to embedded @u submember |
|
* @u: request and response specific data |
|
* @u.adisc: ADISC specific data |
|
* @u.adisc.req: ADISC request |
|
* @u.adisc.rsp: ADISC response |
|
* @u.gid_pn: GID_PN specific data |
|
* @u.gid_pn.req: GID_PN request |
|
* @u.gid_pn.rsp: GID_PN response |
|
* @u.gpn_ft: GPN_FT specific data |
|
* @u.gpn_ft.sg_rsp2: GPN_FT response, not embedded here, allocated elsewhere |
|
* @u.gpn_ft.req: GPN_FT request |
|
* @u.gspn: GSPN specific data |
|
* @u.gspn.req: GSPN request |
|
* @u.gspn.rsp: GSPN response |
|
* @u.rspn: RSPN specific data |
|
* @u.rspn.req: RSPN request |
|
* @u.rspn.rsp: RSPN response |
|
*/ |
|
struct zfcp_fc_req { |
|
struct zfcp_fsf_ct_els ct_els; |
|
struct scatterlist sg_req; |
|
struct scatterlist sg_rsp; |
|
union { |
|
struct { |
|
struct fc_els_adisc req; |
|
struct fc_els_adisc rsp; |
|
} adisc; |
|
struct { |
|
struct zfcp_fc_gid_pn_req req; |
|
struct zfcp_fc_gid_pn_rsp rsp; |
|
} gid_pn; |
|
struct { |
|
struct scatterlist sg_rsp2[ZFCP_FC_GPN_FT_NUM_BUFS - 1]; |
|
struct zfcp_fc_gpn_ft_req req; |
|
} gpn_ft; |
|
struct { |
|
struct zfcp_fc_gspn_req req; |
|
struct zfcp_fc_gspn_rsp rsp; |
|
} gspn; |
|
struct { |
|
struct zfcp_fc_rspn_req req; |
|
struct fc_ct_hdr rsp; |
|
} rspn; |
|
} u; |
|
}; |
|
|
|
/** |
|
* enum zfcp_fc_wka_status - FC WKA port status in zfcp |
|
* @ZFCP_FC_WKA_PORT_OFFLINE: Port is closed and not in use |
|
* @ZFCP_FC_WKA_PORT_CLOSING: The FSF "close port" request is pending |
|
* @ZFCP_FC_WKA_PORT_OPENING: The FSF "open port" request is pending |
|
* @ZFCP_FC_WKA_PORT_ONLINE: The port is open and the port handle is valid |
|
*/ |
|
enum zfcp_fc_wka_status { |
|
ZFCP_FC_WKA_PORT_OFFLINE, |
|
ZFCP_FC_WKA_PORT_CLOSING, |
|
ZFCP_FC_WKA_PORT_OPENING, |
|
ZFCP_FC_WKA_PORT_ONLINE, |
|
}; |
|
|
|
/** |
|
* struct zfcp_fc_wka_port - representation of well-known-address (WKA) FC port |
|
* @adapter: Pointer to adapter structure this WKA port belongs to |
|
* @completion_wq: Wait for completion of open/close command |
|
* @status: Current status of WKA port |
|
* @refcount: Reference count to keep port open as long as it is in use |
|
* @d_id: FC destination id or well-known-address |
|
* @handle: FSF handle for the open WKA port |
|
* @mutex: Mutex used during opening/closing state changes |
|
* @work: For delaying the closing of the WKA port |
|
*/ |
|
struct zfcp_fc_wka_port { |
|
struct zfcp_adapter *adapter; |
|
wait_queue_head_t completion_wq; |
|
enum zfcp_fc_wka_status status; |
|
atomic_t refcount; |
|
u32 d_id; |
|
u32 handle; |
|
struct mutex mutex; |
|
struct delayed_work work; |
|
}; |
|
|
|
/** |
|
* struct zfcp_fc_wka_ports - Data structures for FC generic services |
|
* @ms: FC Management service |
|
* @ts: FC time service |
|
* @ds: FC directory service |
|
* @as: FC alias service |
|
*/ |
|
struct zfcp_fc_wka_ports { |
|
struct zfcp_fc_wka_port ms; |
|
struct zfcp_fc_wka_port ts; |
|
struct zfcp_fc_wka_port ds; |
|
struct zfcp_fc_wka_port as; |
|
}; |
|
|
|
/** |
|
* 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) |
|
{ |
|
u32 datalen; |
|
|
|
int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun); |
|
|
|
fcp->fc_pri_ta = FCP_PTA_SIMPLE; |
|
|
|
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; |
|
|
|
memcpy(fcp->fc_cdb, scsi->cmnd, scsi->cmd_len); |
|
|
|
datalen = scsi_bufflen(scsi); |
|
fcp->fc_dl = cpu_to_be32(datalen); |
|
|
|
if (scsi_get_prot_type(scsi) == SCSI_PROT_DIF_TYPE1) { |
|
datalen += datalen / scsi->device->sector_size * 8; |
|
fcp->fc_dl = cpu_to_be32(datalen); |
|
} |
|
} |
|
|
|
/** |
|
* zfcp_fc_fcp_tm() - Setup FCP command as task management command. |
|
* @fcp: Pointer to FCP_CMND IU to set up. |
|
* @dev: Pointer to SCSI_device where to send the task management command. |
|
* @tm_flags: 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; |
|
|
|
scsi->result |= fcp_rsp->resp.fr_status; |
|
|
|
rsp_flags = fcp_rsp->resp.fr_flags; |
|
|
|
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; |
|
} |
|
} |
|
|
|
if (unlikely(rsp_flags & FCP_SNS_LEN_VAL)) { |
|
sense = (char *) &fcp_rsp[1]; |
|
if (rsp_flags & FCP_RSP_LEN_VAL) |
|
sense += be32_to_cpu(fcp_rsp->ext.fr_rsp_len); |
|
sense_len = min_t(u32, be32_to_cpu(fcp_rsp->ext.fr_sns_len), |
|
SCSI_SENSE_BUFFERSIZE); |
|
memcpy(scsi->sense_buffer, sense, sense_len); |
|
} |
|
|
|
if (unlikely(rsp_flags & FCP_RESID_UNDER)) { |
|
resid = be32_to_cpu(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); |
|
} else if (unlikely(rsp_flags & FCP_RESID_OVER)) { |
|
/* FCP_DL was not sufficient for SCSI data length */ |
|
if (fcp_rsp->resp.fr_status == SAM_STAT_GOOD) |
|
set_host_byte(scsi, DID_ERROR); |
|
} |
|
} |
|
|
|
#endif
|
|
|