[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / scsi / zfcp_fc.h

/*
 * 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
 * @sg_rsp: scatterlist entry for response data
 * @u: request specific data
 */
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
 * @tm: task management flags to setup task management command
 */
static inline
void zfcp_fc_scsi_to_fcp(struct fcp_cmnd *fcp, struct scsi_cmnd *scsi,
			 u8 tm_flags)
{
	char tag[2];

	int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun);

	if (unlikely(tm_flags)) {
		fcp->fc_tm_flags = tm_flags;
		return;
	}

	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;

	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);

	fcp->fc_dl = scsi_bufflen(scsi);

	if (scsi_get_prot_type(scsi) == SCSI_PROT_DIF_TYPE1)
		fcp->fc_dl += fcp->fc_dl / scsi->device->sector_size * 8;
}

/**
 * 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 += fcp_rsp->ext.fr_rsp_len;
		sense_len = min(fcp_rsp->ext.fr_sns_len,
				(u32) SCSI_SENSE_BUFFERSIZE);
		memcpy(scsi->sense_buffer, sense, sense_len);
	}

	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);
	} 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
4318e08c CS	1	/*
	2	* zfcp device driver
	3	*
	4	* Fibre Channel related definitions and inline functions for the zfcp
	5	* device driver
	6	*
e7ab3bd9	7	* Copyright IBM Corp. 2009, 2017
4318e08c CS	8	*/
	9
	10	#ifndef ZFCP_FC_H
	11	#define ZFCP_FC_H
	12
9d05ce2c	13	#include <scsi/fc/fc_els.h>
4318e08c	14	#include <scsi/fc/fc_fcp.h>
dbf5dfe9	15	#include <scsi/fc/fc_ns.h>
4318e08c CS	16	#include <scsi/scsi_cmnd.h>
4318e08c CS	17	#include <scsi/scsi_tcq.h>
7c7dc196	18	#include "zfcp_fsf.h"
4318e08c	19
dbf5dfe9 CS	20	#define ZFCP_FC_CT_SIZE_PAGE (PAGE_SIZE - sizeof(struct fc_ct_hdr))
	21	#define ZFCP_FC_GPN_FT_ENT_PAGE (ZFCP_FC_CT_SIZE_PAGE \
	22	/ sizeof(struct fc_gpn_ft_resp))
	23	#define ZFCP_FC_GPN_FT_NUM_BUFS 4 /* memory pages */
	24
	25	#define ZFCP_FC_GPN_FT_MAX_SIZE (ZFCP_FC_GPN_FT_NUM_BUFS * PAGE_SIZE \
	26	- sizeof(struct fc_ct_hdr))
	27	#define ZFCP_FC_GPN_FT_MAX_ENT (ZFCP_FC_GPN_FT_NUM_BUFS * \
	28	(ZFCP_FC_GPN_FT_ENT_PAGE + 1))
	29
51375ee8 SS	30	#define ZFCP_FC_CTELS_TMO (2 * FC_DEF_R_A_TOV / 1000)
51375ee8 SS	31
2d1e547f SS	32	/**
	33	* struct zfcp_fc_event - FC HBAAPI event for internal queueing from irq context
	34	* @code: Event code
	35	* @data: Event data
	36	* @list: list_head for zfcp_fc_events list
	37	*/
	38	struct zfcp_fc_event {
	39	enum fc_host_event_code code;
	40	u32 data;
	41	struct list_head list;
	42	};
	43
	44	/**
	45	* struct zfcp_fc_events - Infrastructure for posting FC events from irq context
	46	* @list: List for queueing of events from irq context to workqueue
	47	* @list_lock: Lock for event list
	48	* @work: work_struct for forwarding events in workqueue
	49	*/
	50	struct zfcp_fc_events {
	51	struct list_head list;
	52	spinlock_t list_lock;
	53	struct work_struct work;
	54	};
	55
dbf5dfe9 CS	56	/**
	57	* struct zfcp_fc_gid_pn_req - container for ct header plus gid_pn request
	58	* @ct_hdr: FC GS common transport header
	59	* @gid_pn: GID_PN request
	60	*/
	61	struct zfcp_fc_gid_pn_req {
	62	struct fc_ct_hdr ct_hdr;
	63	struct fc_ns_gid_pn gid_pn;
	64	} __packed;
	65
	66	/**
fcf7e614	67	* struct zfcp_fc_gid_pn_rsp - container for ct header plus gid_pn response
dbf5dfe9 CS	68	* @ct_hdr: FC GS common transport header
	69	* @gid_pn: GID_PN response
	70	*/
fcf7e614	71	struct zfcp_fc_gid_pn_rsp {
dbf5dfe9 CS	72	struct fc_ct_hdr ct_hdr;
	73	struct fc_gid_pn_resp gid_pn;
	74	} __packed;
	75
dbf5dfe9 CS	76	/**
	77	* struct zfcp_fc_gpn_ft - container for ct header plus gpn_ft request
	78	* @ct_hdr: FC GS common transport header
	79	* @gpn_ft: GPN_FT request
	80	*/
	81	struct zfcp_fc_gpn_ft_req {
	82	struct fc_ct_hdr ct_hdr;
	83	struct fc_ns_gid_ft gpn_ft;
	84	} __packed;
	85
038d9446 CS	86	/**
	87	* struct zfcp_fc_gspn_req - container for ct header plus GSPN_ID request
	88	* @ct_hdr: FC GS common transport header
	89	* @gspn: GSPN_ID request
	90	*/
	91	struct zfcp_fc_gspn_req {
	92	struct fc_ct_hdr ct_hdr;
	93	struct fc_gid_pn_resp gspn;
	94	} __packed;
	95
	96	/**
	97	* struct zfcp_fc_gspn_rsp - container for ct header plus GSPN_ID response
	98	* @ct_hdr: FC GS common transport header
	99	* @gspn: GSPN_ID response
	100	* @name: The name string of the GSPN_ID response
	101	*/
	102	struct zfcp_fc_gspn_rsp {
	103	struct fc_ct_hdr ct_hdr;
	104	struct fc_gspn_resp gspn;
	105	char name[FC_SYMBOLIC_NAME_SIZE];
	106	} __packed;
	107
	108	/**
	109	* struct zfcp_fc_rspn_req - container for ct header plus RSPN_ID request
	110	* @ct_hdr: FC GS common transport header
	111	* @rspn: RSPN_ID request
	112	* @name: The name string of the RSPN_ID request
	113	*/
	114	struct zfcp_fc_rspn_req {
	115	struct fc_ct_hdr ct_hdr;
	116	struct fc_ns_rspn rspn;
	117	char name[FC_SYMBOLIC_NAME_SIZE];
	118	} __packed;
	119
9d05ce2c	120	/**
087897e3 CS	121	* struct zfcp_fc_req - Container for FC ELS and CT requests sent from zfcp
	122	* @ct_els: data required for issuing fsf command
	123	* @sg_req: scatterlist entry for request data
	124	* @sg_rsp: scatterlist entry for response data
	125	* @u: request specific data
9d05ce2c	126	*/
087897e3 CS	127	struct zfcp_fc_req {
	128	struct zfcp_fsf_ct_els ct_els;
	129	struct scatterlist sg_req;
	130	struct scatterlist sg_rsp;
	131	union {
	132	struct {
	133	struct fc_els_adisc req;
	134	struct fc_els_adisc rsp;
	135	} adisc;
fcf7e614 CS	136	struct {
	137	struct zfcp_fc_gid_pn_req req;
	138	struct zfcp_fc_gid_pn_rsp rsp;
	139	} gid_pn;
f9773229 CS	140	struct {
	141	struct scatterlist sg_rsp2[ZFCP_FC_GPN_FT_NUM_BUFS - 1];
	142	struct zfcp_fc_gpn_ft_req req;
	143	} gpn_ft;
038d9446 CS	144	struct {
	145	struct zfcp_fc_gspn_req req;
	146	struct zfcp_fc_gspn_rsp rsp;
	147	} gspn;
	148	struct {
	149	struct zfcp_fc_rspn_req req;
	150	struct fc_ct_hdr rsp;
	151	} rspn;
087897e3	152	} u;
9d05ce2c CS	153	};
9d05ce2c CS	154
bd0072ec CS	155	/**
	156	* enum zfcp_fc_wka_status - FC WKA port status in zfcp
	157	* @ZFCP_FC_WKA_PORT_OFFLINE: Port is closed and not in use
	158	* @ZFCP_FC_WKA_PORT_CLOSING: The FSF "close port" request is pending
	159	* @ZFCP_FC_WKA_PORT_OPENING: The FSF "open port" request is pending
	160	* @ZFCP_FC_WKA_PORT_ONLINE: The port is open and the port handle is valid
	161	*/
	162	enum zfcp_fc_wka_status {
	163	ZFCP_FC_WKA_PORT_OFFLINE,
	164	ZFCP_FC_WKA_PORT_CLOSING,
	165	ZFCP_FC_WKA_PORT_OPENING,
	166	ZFCP_FC_WKA_PORT_ONLINE,
	167	};
	168
	169	/**
	170	* struct zfcp_fc_wka_port - representation of well-known-address (WKA) FC port
	171	* @adapter: Pointer to adapter structure this WKA port belongs to
	172	* @completion_wq: Wait for completion of open/close command
	173	* @status: Current status of WKA port
	174	* @refcount: Reference count to keep port open as long as it is in use
	175	* @d_id: FC destination id or well-known-address
	176	* @handle: FSF handle for the open WKA port
	177	* @mutex: Mutex used during opening/closing state changes
	178	* @work: For delaying the closing of the WKA port
	179	*/
	180	struct zfcp_fc_wka_port {
	181	struct zfcp_adapter *adapter;
	182	wait_queue_head_t completion_wq;
	183	enum zfcp_fc_wka_status status;
	184	atomic_t refcount;
	185	u32 d_id;
	186	u32 handle;
	187	struct mutex mutex;
	188	struct delayed_work work;
	189	};
	190
	191	/**
	192	* struct zfcp_fc_wka_ports - Data structures for FC generic services
	193	* @ms: FC Management service
	194	* @ts: FC time service
	195	* @ds: FC directory service
	196	* @as: FC alias service
	197	*/
	198	struct zfcp_fc_wka_ports {
	199	struct zfcp_fc_wka_port ms;
	200	struct zfcp_fc_wka_port ts;
	201	struct zfcp_fc_wka_port ds;
	202	struct zfcp_fc_wka_port as;
	203	};
	204
4318e08c CS	205	/**
	206	* zfcp_fc_scsi_to_fcp - setup FCP command with data from scsi_cmnd
	207	* @fcp: fcp_cmnd to setup
	208	* @scsi: scsi_cmnd where to get LUN, task attributes/flags and CDB
2443c8b2	209	* @tm: task management flags to setup task management command
4318e08c CS	210	*/
4318e08c CS	211	static inline
2443c8b2 CS	212	void zfcp_fc_scsi_to_fcp(struct fcp_cmnd fcp, struct scsi_cmnd scsi,
2443c8b2 CS	213	u8 tm_flags)
4318e08c CS	214	{
	215	char tag[2];
	216
	217	int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun);
	218
2443c8b2 CS	219	if (unlikely(tm_flags)) {
	220	fcp->fc_tm_flags = tm_flags;
	221	return;
	222	}
	223
4318e08c CS	224	if (scsi_populate_tag_msg(scsi, tag)) {
	225	switch (tag[0]) {
	226	case MSG_ORDERED_TAG:
	227	fcp->fc_pri_ta \|= FCP_PTA_ORDERED;
	228	break;
	229	case MSG_SIMPLE_TAG:
	230	fcp->fc_pri_ta \|= FCP_PTA_SIMPLE;
	231	break;
	232	};
	233	} else
	234	fcp->fc_pri_ta = FCP_PTA_SIMPLE;
	235
	236	if (scsi->sc_data_direction == DMA_FROM_DEVICE)
	237	fcp->fc_flags \|= FCP_CFL_RDDATA;
	238	if (scsi->sc_data_direction == DMA_TO_DEVICE)
	239	fcp->fc_flags \|= FCP_CFL_WRDATA;
	240
	241	memcpy(fcp->fc_cdb, scsi->cmnd, scsi->cmd_len);
	242
	243	fcp->fc_dl = scsi_bufflen(scsi);
ef3eb71d FB	244
	245	if (scsi_get_prot_type(scsi) == SCSI_PROT_DIF_TYPE1)
	246	fcp->fc_dl += fcp->fc_dl / scsi->device->sector_size * 8;
4318e08c CS	247	}
4318e08c CS	248
4318e08c CS	249	/**
	250	* zfcp_fc_evap_fcp_rsp - evaluate FCP RSP IU and update scsi_cmnd accordingly
	251	* @fcp_rsp: FCP RSP IU to evaluate
	252	* @scsi: SCSI command where to update status and sense buffer
	253	*/
	254	static inline
	255	void zfcp_fc_eval_fcp_rsp(struct fcp_resp_with_ext *fcp_rsp,
	256	struct scsi_cmnd *scsi)
	257	{
	258	struct fcp_resp_rsp_info *rsp_info;
	259	char *sense;
	260	u32 sense_len, resid;
	261	u8 rsp_flags;
	262
	263	set_msg_byte(scsi, COMMAND_COMPLETE);
	264	scsi->result \|= fcp_rsp->resp.fr_status;
	265
	266	rsp_flags = fcp_rsp->resp.fr_flags;
	267
	268	if (unlikely(rsp_flags & FCP_RSP_LEN_VAL)) {
	269	rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
	270	if (rsp_info->rsp_code == FCP_TMF_CMPL)
	271	set_host_byte(scsi, DID_OK);
	272	else {
	273	set_host_byte(scsi, DID_ERROR);
	274	return;
	275	}
	276	}
	277
	278	if (unlikely(rsp_flags & FCP_SNS_LEN_VAL)) {
	279	sense = (char *) &fcp_rsp[1];
	280	if (rsp_flags & FCP_RSP_LEN_VAL)
fb5a6389	281	sense += fcp_rsp->ext.fr_rsp_len;
4318e08c CS	282	sense_len = min(fcp_rsp->ext.fr_sns_len,
	283	(u32) SCSI_SENSE_BUFFERSIZE);
	284	memcpy(scsi->sense_buffer, sense, sense_len);
	285	}
	286
	287	if (unlikely(rsp_flags & FCP_RESID_UNDER)) {
	288	resid = fcp_rsp->ext.fr_resid;
	289	scsi_set_resid(scsi, resid);
	290	if (scsi_bufflen(scsi) - resid < scsi->underflow &&
	291	!(rsp_flags & FCP_SNS_LEN_VAL) &&
	292	fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
	293	set_host_byte(scsi, DID_ERROR);
e7ab3bd9 BB	294	} else if (unlikely(rsp_flags & FCP_RESID_OVER)) {
	295	/* FCP_DL was not sufficient for SCSI data length */
	296	if (fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
	297	set_host_byte(scsi, DID_ERROR);
4318e08c CS	298	}
	299	}
	300
	301	#endif