[linux-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
 * @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)
{
	u32 datalen;

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

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

	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_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
	123	* @ct_els: data required for issuing fsf command
	124	* @sg_req: scatterlist entry for request data
	125	* @sg_rsp: scatterlist entry for response data
	126	* @u: request specific data
9d05ce2c	127	*/
087897e3 CS	128	struct zfcp_fc_req {
	129	struct zfcp_fsf_ct_els ct_els;
	130	struct scatterlist sg_req;
	131	struct scatterlist sg_rsp;
	132	union {
	133	struct {
	134	struct fc_els_adisc req;
	135	struct fc_els_adisc rsp;
	136	} adisc;
fcf7e614 CS	137	struct {
	138	struct zfcp_fc_gid_pn_req req;
	139	struct zfcp_fc_gid_pn_rsp rsp;
	140	} gid_pn;
f9773229 CS	141	struct {
	142	struct scatterlist sg_rsp2[ZFCP_FC_GPN_FT_NUM_BUFS - 1];
	143	struct zfcp_fc_gpn_ft_req req;
	144	} gpn_ft;
038d9446 CS	145	struct {
	146	struct zfcp_fc_gspn_req req;
	147	struct zfcp_fc_gspn_rsp rsp;
	148	} gspn;
	149	struct {
	150	struct zfcp_fc_rspn_req req;
	151	struct fc_ct_hdr rsp;
	152	} rspn;
087897e3	153	} u;
9d05ce2c CS	154	};
9d05ce2c CS	155
bd0072ec CS	156	/**
	157	* enum zfcp_fc_wka_status - FC WKA port status in zfcp
	158	* @ZFCP_FC_WKA_PORT_OFFLINE: Port is closed and not in use
	159	* @ZFCP_FC_WKA_PORT_CLOSING: The FSF "close port" request is pending
	160	* @ZFCP_FC_WKA_PORT_OPENING: The FSF "open port" request is pending
	161	* @ZFCP_FC_WKA_PORT_ONLINE: The port is open and the port handle is valid
	162	*/
	163	enum zfcp_fc_wka_status {
	164	ZFCP_FC_WKA_PORT_OFFLINE,
	165	ZFCP_FC_WKA_PORT_CLOSING,
	166	ZFCP_FC_WKA_PORT_OPENING,
	167	ZFCP_FC_WKA_PORT_ONLINE,
	168	};
	169
	170	/**
	171	* struct zfcp_fc_wka_port - representation of well-known-address (WKA) FC port
	172	* @adapter: Pointer to adapter structure this WKA port belongs to
	173	* @completion_wq: Wait for completion of open/close command
	174	* @status: Current status of WKA port
	175	* @refcount: Reference count to keep port open as long as it is in use
	176	* @d_id: FC destination id or well-known-address
	177	* @handle: FSF handle for the open WKA port
	178	* @mutex: Mutex used during opening/closing state changes
	179	* @work: For delaying the closing of the WKA port
	180	*/
	181	struct zfcp_fc_wka_port {
	182	struct zfcp_adapter *adapter;
	183	wait_queue_head_t completion_wq;
	184	enum zfcp_fc_wka_status status;
	185	atomic_t refcount;
	186	u32 d_id;
	187	u32 handle;
	188	struct mutex mutex;
	189	struct delayed_work work;
	190	};
	191
	192	/**
	193	* struct zfcp_fc_wka_ports - Data structures for FC generic services
	194	* @ms: FC Management service
	195	* @ts: FC time service
	196	* @ds: FC directory service
	197	* @as: FC alias service
	198	*/
	199	struct zfcp_fc_wka_ports {
	200	struct zfcp_fc_wka_port ms;
	201	struct zfcp_fc_wka_port ts;
	202	struct zfcp_fc_wka_port ds;
	203	struct zfcp_fc_wka_port as;
	204	};
	205
4318e08c CS	206	/**
	207	* zfcp_fc_scsi_to_fcp - setup FCP command with data from scsi_cmnd
	208	* @fcp: fcp_cmnd to setup
	209	* @scsi: scsi_cmnd where to get LUN, task attributes/flags and CDB
2443c8b2	210	* @tm: task management flags to setup task management command
4318e08c CS	211	*/
4318e08c CS	212	static inline
2443c8b2 CS	213	void zfcp_fc_scsi_to_fcp(struct fcp_cmnd fcp, struct scsi_cmnd scsi,
2443c8b2 CS	214	u8 tm_flags)
4318e08c	215	{
9d464fc1 SM	216	u32 datalen;
9d464fc1 SM	217
4318e08c CS	218	int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun);
4318e08c CS	219
2443c8b2 CS	220	if (unlikely(tm_flags)) {
	221	fcp->fc_tm_flags = tm_flags;
	222	return;
	223	}
	224
50668633	225	fcp->fc_pri_ta = FCP_PTA_SIMPLE;
4318e08c CS	226
	227	if (scsi->sc_data_direction == DMA_FROM_DEVICE)
	228	fcp->fc_flags \|= FCP_CFL_RDDATA;
	229	if (scsi->sc_data_direction == DMA_TO_DEVICE)
	230	fcp->fc_flags \|= FCP_CFL_WRDATA;
	231
	232	memcpy(fcp->fc_cdb, scsi->cmnd, scsi->cmd_len);
	233
9d464fc1 SM	234	datalen = scsi_bufflen(scsi);
9d464fc1 SM	235	fcp->fc_dl = cpu_to_be32(datalen);
ef3eb71d	236
9d464fc1 SM	237	if (scsi_get_prot_type(scsi) == SCSI_PROT_DIF_TYPE1) {
	238	datalen += datalen / scsi->device->sector_size * 8;
	239	fcp->fc_dl = cpu_to_be32(datalen);
	240	}
4318e08c CS	241	}
4318e08c CS	242
4318e08c CS	243	/**
	244	* zfcp_fc_evap_fcp_rsp - evaluate FCP RSP IU and update scsi_cmnd accordingly
	245	* @fcp_rsp: FCP RSP IU to evaluate
	246	* @scsi: SCSI command where to update status and sense buffer
	247	*/
	248	static inline
	249	void zfcp_fc_eval_fcp_rsp(struct fcp_resp_with_ext *fcp_rsp,
	250	struct scsi_cmnd *scsi)
	251	{
	252	struct fcp_resp_rsp_info *rsp_info;
	253	char *sense;
	254	u32 sense_len, resid;
	255	u8 rsp_flags;
	256
	257	set_msg_byte(scsi, COMMAND_COMPLETE);
	258	scsi->result \|= fcp_rsp->resp.fr_status;
	259
	260	rsp_flags = fcp_rsp->resp.fr_flags;
	261
	262	if (unlikely(rsp_flags & FCP_RSP_LEN_VAL)) {
	263	rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
	264	if (rsp_info->rsp_code == FCP_TMF_CMPL)
	265	set_host_byte(scsi, DID_OK);
	266	else {
	267	set_host_byte(scsi, DID_ERROR);
	268	return;
	269	}
	270	}
	271
	272	if (unlikely(rsp_flags & FCP_SNS_LEN_VAL)) {
	273	sense = (char *) &fcp_rsp[1];
	274	if (rsp_flags & FCP_RSP_LEN_VAL)
9d464fc1 SM	275	sense += be32_to_cpu(fcp_rsp->ext.fr_rsp_len);
	276	sense_len = min_t(u32, be32_to_cpu(fcp_rsp->ext.fr_sns_len),
	277	SCSI_SENSE_BUFFERSIZE);
4318e08c CS	278	memcpy(scsi->sense_buffer, sense, sense_len);
	279	}
	280
	281	if (unlikely(rsp_flags & FCP_RESID_UNDER)) {
9d464fc1	282	resid = be32_to_cpu(fcp_rsp->ext.fr_resid);
4318e08c CS	283	scsi_set_resid(scsi, resid);
	284	if (scsi_bufflen(scsi) - resid < scsi->underflow &&
	285	!(rsp_flags & FCP_SNS_LEN_VAL) &&
	286	fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
	287	set_host_byte(scsi, DID_ERROR);
a099b7b1 BB	288	} else if (unlikely(rsp_flags & FCP_RESID_OVER)) {
	289	/* FCP_DL was not sufficient for SCSI data length */
	290	if (fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
	291	set_host_byte(scsi, DID_ERROR);
4318e08c CS	292	}
	293	}
	294
	295	#endif