[linux-2.6-block.git] / drivers / s390 / scsi / zfcp_fc.h

/* 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;

	set_msg_byte(scsi, COMMAND_COMPLETE);
	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
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
4318e08c CS	2	/*
	3	* zfcp device driver
	4	*
	5	* Fibre Channel related definitions and inline functions for the zfcp
	6	* device driver
	7	*
a099b7b1	8	* Copyright IBM Corp. 2009, 2017
4318e08c CS	9	*/
	10
	11	#ifndef ZFCP_FC_H
	12	#define ZFCP_FC_H
	13
9d05ce2c	14	#include <scsi/fc/fc_els.h>
4318e08c	15	#include <scsi/fc/fc_fcp.h>
dbf5dfe9	16	#include <scsi/fc/fc_ns.h>
4318e08c CS	17	#include <scsi/scsi_cmnd.h>
4318e08c CS	18	#include <scsi/scsi_tcq.h>
7c7dc196	19	#include "zfcp_fsf.h"
4318e08c	20
dbf5dfe9 CS	21	#define ZFCP_FC_CT_SIZE_PAGE (PAGE_SIZE - sizeof(struct fc_ct_hdr))
	22	#define ZFCP_FC_GPN_FT_ENT_PAGE (ZFCP_FC_CT_SIZE_PAGE \
	23	/ sizeof(struct fc_gpn_ft_resp))
	24	#define ZFCP_FC_GPN_FT_NUM_BUFS 4 /* memory pages */
	25
	26	#define ZFCP_FC_GPN_FT_MAX_SIZE (ZFCP_FC_GPN_FT_NUM_BUFS * PAGE_SIZE \
	27	- sizeof(struct fc_ct_hdr))
	28	#define ZFCP_FC_GPN_FT_MAX_ENT (ZFCP_FC_GPN_FT_NUM_BUFS * \
	29	(ZFCP_FC_GPN_FT_ENT_PAGE + 1))
	30
51375ee8 SS	31	#define ZFCP_FC_CTELS_TMO (2 * FC_DEF_R_A_TOV / 1000)
51375ee8 SS	32
2d1e547f SS	33	/**
	34	* struct zfcp_fc_event - FC HBAAPI event for internal queueing from irq context
	35	* @code: Event code
	36	* @data: Event data
	37	* @list: list_head for zfcp_fc_events list
	38	*/
	39	struct zfcp_fc_event {
	40	enum fc_host_event_code code;
	41	u32 data;
	42	struct list_head list;
	43	};
	44
	45	/**
	46	* struct zfcp_fc_events - Infrastructure for posting FC events from irq context
	47	* @list: List for queueing of events from irq context to workqueue
	48	* @list_lock: Lock for event list
	49	* @work: work_struct for forwarding events in workqueue
	50	*/
	51	struct zfcp_fc_events {
	52	struct list_head list;
	53	spinlock_t list_lock;
	54	struct work_struct work;
	55	};
	56
dbf5dfe9 CS	57	/**
	58	* struct zfcp_fc_gid_pn_req - container for ct header plus gid_pn request
	59	* @ct_hdr: FC GS common transport header
	60	* @gid_pn: GID_PN request
	61	*/
	62	struct zfcp_fc_gid_pn_req {
	63	struct fc_ct_hdr ct_hdr;
	64	struct fc_ns_gid_pn gid_pn;
	65	} __packed;
	66
	67	/**
fcf7e614	68	* struct zfcp_fc_gid_pn_rsp - container for ct header plus gid_pn response
dbf5dfe9 CS	69	* @ct_hdr: FC GS common transport header
	70	* @gid_pn: GID_PN response
	71	*/
fcf7e614	72	struct zfcp_fc_gid_pn_rsp {
dbf5dfe9 CS	73	struct fc_ct_hdr ct_hdr;
	74	struct fc_gid_pn_resp gid_pn;
	75	} __packed;
	76
dbf5dfe9 CS	77	/**
	78	* struct zfcp_fc_gpn_ft - container for ct header plus gpn_ft request
	79	* @ct_hdr: FC GS common transport header
	80	* @gpn_ft: GPN_FT request
	81	*/
	82	struct zfcp_fc_gpn_ft_req {
	83	struct fc_ct_hdr ct_hdr;
	84	struct fc_ns_gid_ft gpn_ft;
	85	} __packed;
	86
038d9446 CS	87	/**
	88	* struct zfcp_fc_gspn_req - container for ct header plus GSPN_ID request
	89	* @ct_hdr: FC GS common transport header
	90	* @gspn: GSPN_ID request
	91	*/
	92	struct zfcp_fc_gspn_req {
	93	struct fc_ct_hdr ct_hdr;
	94	struct fc_gid_pn_resp gspn;
	95	} __packed;
	96
	97	/**
	98	* struct zfcp_fc_gspn_rsp - container for ct header plus GSPN_ID response
	99	* @ct_hdr: FC GS common transport header
	100	* @gspn: GSPN_ID response
	101	* @name: The name string of the GSPN_ID response
	102	*/
	103	struct zfcp_fc_gspn_rsp {
	104	struct fc_ct_hdr ct_hdr;
	105	struct fc_gspn_resp gspn;
	106	char name[FC_SYMBOLIC_NAME_SIZE];
	107	} __packed;
	108
	109	/**
	110	* struct zfcp_fc_rspn_req - container for ct header plus RSPN_ID request
	111	* @ct_hdr: FC GS common transport header
	112	* @rspn: RSPN_ID request
	113	* @name: The name string of the RSPN_ID request
	114	*/
	115	struct zfcp_fc_rspn_req {
	116	struct fc_ct_hdr ct_hdr;
	117	struct fc_ns_rspn rspn;
	118	char name[FC_SYMBOLIC_NAME_SIZE];
	119	} __packed;
	120
9d05ce2c	121	/**
087897e3 CS	122	* struct zfcp_fc_req - Container for FC ELS and CT requests sent from zfcp
087897e3 CS	123	* @ct_els: data required for issuing fsf command
623cd180 SM	124	* @sg_req: scatterlist entry for request data, refers to embedded @u submember
	125	* @sg_rsp: scatterlist entry for response data, refers to embedded @u submember
	126	* @u: request and response specific data
	127	* @u.adisc: ADISC specific data
	128	* @u.adisc.req: ADISC request
	129	* @u.adisc.rsp: ADISC response
	130	* @u.gid_pn: GID_PN specific data
	131	* @u.gid_pn.req: GID_PN request
	132	* @u.gid_pn.rsp: GID_PN response
	133	* @u.gpn_ft: GPN_FT specific data
	134	* @u.gpn_ft.sg_rsp2: GPN_FT response, not embedded here, allocated elsewhere
	135	* @u.gpn_ft.req: GPN_FT request
	136	* @u.gspn: GSPN specific data
	137	* @u.gspn.req: GSPN request
	138	* @u.gspn.rsp: GSPN response
	139	* @u.rspn: RSPN specific data
	140	* @u.rspn.req: RSPN request
	141	* @u.rspn.rsp: RSPN response
9d05ce2c	142	*/
087897e3 CS	143	struct zfcp_fc_req {
	144	struct zfcp_fsf_ct_els ct_els;
	145	struct scatterlist sg_req;
	146	struct scatterlist sg_rsp;
	147	union {
	148	struct {
	149	struct fc_els_adisc req;
	150	struct fc_els_adisc rsp;
	151	} adisc;
fcf7e614 CS	152	struct {
	153	struct zfcp_fc_gid_pn_req req;
	154	struct zfcp_fc_gid_pn_rsp rsp;
	155	} gid_pn;
f9773229 CS	156	struct {
	157	struct scatterlist sg_rsp2[ZFCP_FC_GPN_FT_NUM_BUFS - 1];
	158	struct zfcp_fc_gpn_ft_req req;
	159	} gpn_ft;
038d9446 CS	160	struct {
	161	struct zfcp_fc_gspn_req req;
	162	struct zfcp_fc_gspn_rsp rsp;
	163	} gspn;
	164	struct {
	165	struct zfcp_fc_rspn_req req;
	166	struct fc_ct_hdr rsp;
	167	} rspn;
087897e3	168	} u;
9d05ce2c CS	169	};
9d05ce2c CS	170
bd0072ec CS	171	/**
	172	* enum zfcp_fc_wka_status - FC WKA port status in zfcp
	173	* @ZFCP_FC_WKA_PORT_OFFLINE: Port is closed and not in use
	174	* @ZFCP_FC_WKA_PORT_CLOSING: The FSF "close port" request is pending
	175	* @ZFCP_FC_WKA_PORT_OPENING: The FSF "open port" request is pending
	176	* @ZFCP_FC_WKA_PORT_ONLINE: The port is open and the port handle is valid
	177	*/
	178	enum zfcp_fc_wka_status {
	179	ZFCP_FC_WKA_PORT_OFFLINE,
	180	ZFCP_FC_WKA_PORT_CLOSING,
	181	ZFCP_FC_WKA_PORT_OPENING,
	182	ZFCP_FC_WKA_PORT_ONLINE,
	183	};
	184
	185	/**
	186	* struct zfcp_fc_wka_port - representation of well-known-address (WKA) FC port
	187	* @adapter: Pointer to adapter structure this WKA port belongs to
	188	* @completion_wq: Wait for completion of open/close command
	189	* @status: Current status of WKA port
	190	* @refcount: Reference count to keep port open as long as it is in use
	191	* @d_id: FC destination id or well-known-address
	192	* @handle: FSF handle for the open WKA port
	193	* @mutex: Mutex used during opening/closing state changes
	194	* @work: For delaying the closing of the WKA port
	195	*/
	196	struct zfcp_fc_wka_port {
	197	struct zfcp_adapter *adapter;
	198	wait_queue_head_t completion_wq;
	199	enum zfcp_fc_wka_status status;
	200	atomic_t refcount;
	201	u32 d_id;
	202	u32 handle;
	203	struct mutex mutex;
	204	struct delayed_work work;
	205	};
	206
	207	/**
	208	* struct zfcp_fc_wka_ports - Data structures for FC generic services
	209	* @ms: FC Management service
	210	* @ts: FC time service
	211	* @ds: FC directory service
	212	* @as: FC alias service
	213	*/
	214	struct zfcp_fc_wka_ports {
	215	struct zfcp_fc_wka_port ms;
	216	struct zfcp_fc_wka_port ts;
	217	struct zfcp_fc_wka_port ds;
	218	struct zfcp_fc_wka_port as;
	219	};
	220
4318e08c CS	221	/**
	222	* zfcp_fc_scsi_to_fcp - setup FCP command with data from scsi_cmnd
	223	* @fcp: fcp_cmnd to setup
	224	* @scsi: scsi_cmnd where to get LUN, task attributes/flags and CDB
	225	*/
	226	static inline
e0116c91	227	void zfcp_fc_scsi_to_fcp(struct fcp_cmnd fcp, struct scsi_cmnd scsi)
4318e08c	228	{
9d464fc1 SM	229	u32 datalen;
9d464fc1 SM	230
4318e08c CS	231	int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun);
4318e08c CS	232
50668633	233	fcp->fc_pri_ta = FCP_PTA_SIMPLE;
4318e08c CS	234
	235	if (scsi->sc_data_direction == DMA_FROM_DEVICE)
	236	fcp->fc_flags \|= FCP_CFL_RDDATA;
	237	if (scsi->sc_data_direction == DMA_TO_DEVICE)
	238	fcp->fc_flags \|= FCP_CFL_WRDATA;
	239
	240	memcpy(fcp->fc_cdb, scsi->cmnd, scsi->cmd_len);
	241
9d464fc1 SM	242	datalen = scsi_bufflen(scsi);
9d464fc1 SM	243	fcp->fc_dl = cpu_to_be32(datalen);
ef3eb71d	244
9d464fc1 SM	245	if (scsi_get_prot_type(scsi) == SCSI_PROT_DIF_TYPE1) {
	246	datalen += datalen / scsi->device->sector_size * 8;
	247	fcp->fc_dl = cpu_to_be32(datalen);
	248	}
4318e08c CS	249	}
4318e08c CS	250
e0116c91 SM	251	/**
	252	* zfcp_fc_fcp_tm() - Setup FCP command as task management command.
	253	* @fcp: Pointer to FCP_CMND IU to set up.
	254	* @dev: Pointer to SCSI_device where to send the task management command.
	255	* @tm_flags: Task management flags to setup tm command.
	256	*/
	257	static inline
	258	void zfcp_fc_fcp_tm(struct fcp_cmnd fcp, struct scsi_device dev, u8 tm_flags)
	259	{
	260	int_to_scsilun(dev->lun, (struct scsi_lun *) &fcp->fc_lun);
	261	fcp->fc_tm_flags = tm_flags;
	262	}
	263
4318e08c CS	264	/**
	265	* zfcp_fc_evap_fcp_rsp - evaluate FCP RSP IU and update scsi_cmnd accordingly
	266	* @fcp_rsp: FCP RSP IU to evaluate
	267	* @scsi: SCSI command where to update status and sense buffer
	268	*/
	269	static inline
	270	void zfcp_fc_eval_fcp_rsp(struct fcp_resp_with_ext *fcp_rsp,
	271	struct scsi_cmnd *scsi)
	272	{
	273	struct fcp_resp_rsp_info *rsp_info;
	274	char *sense;
	275	u32 sense_len, resid;
	276	u8 rsp_flags;
	277
	278	set_msg_byte(scsi, COMMAND_COMPLETE);
	279	scsi->result \|= fcp_rsp->resp.fr_status;
	280
	281	rsp_flags = fcp_rsp->resp.fr_flags;
	282
	283	if (unlikely(rsp_flags & FCP_RSP_LEN_VAL)) {
	284	rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
	285	if (rsp_info->rsp_code == FCP_TMF_CMPL)
	286	set_host_byte(scsi, DID_OK);
	287	else {
	288	set_host_byte(scsi, DID_ERROR);
	289	return;
	290	}
	291	}
	292
	293	if (unlikely(rsp_flags & FCP_SNS_LEN_VAL)) {
	294	sense = (char *) &fcp_rsp[1];
	295	if (rsp_flags & FCP_RSP_LEN_VAL)
9d464fc1 SM	296	sense += be32_to_cpu(fcp_rsp->ext.fr_rsp_len);
	297	sense_len = min_t(u32, be32_to_cpu(fcp_rsp->ext.fr_sns_len),
	298	SCSI_SENSE_BUFFERSIZE);
4318e08c CS	299	memcpy(scsi->sense_buffer, sense, sense_len);
	300	}
	301
	302	if (unlikely(rsp_flags & FCP_RESID_UNDER)) {
9d464fc1	303	resid = be32_to_cpu(fcp_rsp->ext.fr_resid);
4318e08c CS	304	scsi_set_resid(scsi, resid);
	305	if (scsi_bufflen(scsi) - resid < scsi->underflow &&
	306	!(rsp_flags & FCP_SNS_LEN_VAL) &&
	307	fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
	308	set_host_byte(scsi, DID_ERROR);
a099b7b1 BB	309	} else if (unlikely(rsp_flags & FCP_RESID_OVER)) {
	310	/* FCP_DL was not sufficient for SCSI data length */
	311	if (fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
	312	set_host_byte(scsi, DID_ERROR);
4318e08c CS	313	}
	314	}
	315
	316	#endif