ibmvstgt: remove

The IBM virtual SCSI protocol has been obsoleted by ibmvfc, and there
are no reported of the driver left.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Paolo Bonzini <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>

drivers/scsi/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called ibmvscsi.
 
-config SCSI_IBMVSCSIS
-	tristate "IBM Virtual SCSI Server support"
-	depends on PPC_PSERIES && SCSI_SRP && SCSI_SRP_TGT_ATTRS
-	help
-	  This is the SRP target driver for IBM pSeries virtual environments.
-
-	  The userspace component needed to initialize the driver and
-	  documentation can be found:
-
-	  http://stgt.berlios.de/
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called ibmvstgt.
-
 config SCSI_IBMVFC
 	tristate "IBM Virtual FC support"
 	depends on PPC_PSERIES && SCSI

drivers/scsi/Makefile

···
 obj-$(CONFIG_SCSI_IPR)		+= ipr.o
 obj-$(CONFIG_SCSI_SRP)		+= libsrp.o
 obj-$(CONFIG_SCSI_IBMVSCSI)	+= ibmvscsi/
-obj-$(CONFIG_SCSI_IBMVSCSIS)	+= ibmvscsi/
 obj-$(CONFIG_SCSI_IBMVFC)	+= ibmvscsi/
 obj-$(CONFIG_SCSI_HPTIOP)	+= hptiop.o
 obj-$(CONFIG_SCSI_STEX)		+= stex.o

drivers/scsi/ibmvscsi/Makefile

···
 obj-$(CONFIG_SCSI_IBMVSCSI)	+= ibmvscsi.o
-obj-$(CONFIG_SCSI_IBMVSCSIS)	+= ibmvstgt.o
 obj-$(CONFIG_SCSI_IBMVFC)	+= ibmvfc.o

drivers/scsi/ibmvscsi/ibmvstgt.c

···
-/*
- * IBM eServer i/pSeries Virtual SCSI Target Driver
- * Copyright (C) 2003-2005 Dave Boutcher ([e-mail]) IBM Corp.
- *			   Santiago Leon ([e-mail]) IBM Corp.
- *			   Linda Xie ([e-mail]) IBM Corp.
- *
- * Copyright (C) 2005-2006 FUJITA Tomonori <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_transport_srp.h>
-#include <scsi/scsi_tgt.h>
-#include <scsi/libsrp.h>
-#include <asm/hvcall.h>
-#include <asm/iommu.h>
-#include <asm/prom.h>
-#include <asm/vio.h>
-
-#include "ibmvscsi.h"
-
-#define	INITIAL_SRP_LIMIT	16
-#define	DEFAULT_MAX_SECTORS	256
-
-#define	TGT_NAME	"ibmvstgt"
-
-/*
- * Hypervisor calls.
- */
-#define h_copy_rdma(l, sa, sb, da, db) \
-			plpar_hcall_norets(H_COPY_RDMA, l, sa, sb, da, db)
-#define h_send_crq(ua, l, h) \
-			plpar_hcall_norets(H_SEND_CRQ, ua, l, h)
-#define h_reg_crq(ua, tok, sz)\
-			plpar_hcall_norets(H_REG_CRQ, ua, tok, sz);
-#define h_free_crq(ua) \
-			plpar_hcall_norets(H_FREE_CRQ, ua);
-
-/* tmp - will replace with SCSI logging stuff */
-#define eprintk(fmt, args...)					\
-do {								\
-	printk("%s(%d) " fmt, __func__, __LINE__, ##args);	\
-} while (0)
-/* #define dprintk eprintk */
-#define dprintk(fmt, args...)
-
-struct vio_port {
-	struct vio_dev *dma_dev;
-
-	struct crq_queue crq_queue;
-	struct work_struct crq_work;
-
-	unsigned long liobn;
-	unsigned long riobn;
-	struct srp_target *target;
-
-	struct srp_rport *rport;
-};
-
-static struct workqueue_struct *vtgtd;
-static struct scsi_transport_template *ibmvstgt_transport_template;
-
-/*
- * These are fixed for the system and come from the Open Firmware device tree.
- * We just store them here to save getting them every time.
- */
-static char system_id[64] = "";
-static char partition_name[97] = "UNKNOWN";
-static unsigned int partition_number = -1;
-
-static struct vio_port *target_to_port(struct srp_target *target)
-{
-	return (struct vio_port *) target->ldata;
-}
-
-static inline union viosrp_iu *vio_iu(struct iu_entry *iue)
-{
-	return (union viosrp_iu *) (iue->sbuf->buf);
-}
-
-static int send_iu(struct iu_entry *iue, uint64_t length, uint8_t format)
-{
-	struct srp_target *target = iue->target;
-	struct vio_port *vport = target_to_port(target);
-	long rc, rc1;
-	union {
-		struct viosrp_crq cooked;
-		uint64_t raw[2];
-	} crq;
-
-	/* First copy the SRP */
-	rc = h_copy_rdma(length, vport->liobn, iue->sbuf->dma,
-			 vport->riobn, iue->remote_token);
-
-	if (rc)
-		eprintk("Error %ld transferring data\n", rc);
-
-	crq.cooked.valid = 0x80;
-	crq.cooked.format = format;
-	crq.cooked.reserved = 0x00;
-	crq.cooked.timeout = 0x00;
-	crq.cooked.IU_length = length;
-	crq.cooked.IU_data_ptr = vio_iu(iue)->srp.rsp.tag;
-
-	if (rc == 0)
-		crq.cooked.status = 0x99;	/* Just needs to be non-zero */
-	else
-		crq.cooked.status = 0x00;
-
-	rc1 = h_send_crq(vport->dma_dev->unit_address, crq.raw[0], crq.raw[1]);
-
-	if (rc1) {
-		eprintk("%ld sending response\n", rc1);
-		return rc1;
-	}
-
-	return rc;
-}
-
-#define SRP_RSP_SENSE_DATA_LEN	18
-
-static int send_rsp(struct iu_entry *iue, struct scsi_cmnd *sc,
-		    unsigned char status, unsigned char asc)
-{
-	union viosrp_iu *iu = vio_iu(iue);
-	uint64_t tag = iu->srp.rsp.tag;
-
-	/* If the linked bit is on and status is good */
-	if (test_bit(V_LINKED, &iue->flags) && (status == NO_SENSE))
-		status = 0x10;
-
-	memset(iu, 0, sizeof(struct srp_rsp));
-	iu->srp.rsp.opcode = SRP_RSP;
-	iu->srp.rsp.req_lim_delta = 1;
-	iu->srp.rsp.tag = tag;
-
-	if (test_bit(V_DIOVER, &iue->flags))
-		iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER;
-
-	iu->srp.rsp.data_in_res_cnt = 0;
-	iu->srp.rsp.data_out_res_cnt = 0;
-
-	iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID;
-
-	iu->srp.rsp.resp_data_len = 0;
-	iu->srp.rsp.status = status;
-	if (status) {
-		uint8_t *sense = iu->srp.rsp.data;
-
-		if (sc) {
-			iu->srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID;
-			iu->srp.rsp.sense_data_len = SCSI_SENSE_BUFFERSIZE;
-			memcpy(sense, sc->sense_buffer, SCSI_SENSE_BUFFERSIZE);
-		} else {
-			iu->srp.rsp.status = SAM_STAT_CHECK_CONDITION;
-			iu->srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID;
-			iu->srp.rsp.sense_data_len = SRP_RSP_SENSE_DATA_LEN;
-
-			/* Valid bit and 'current errors' */
-			sense[0] = (0x1 << 7 | 0x70);
-			/* Sense key */
-			sense[2] = status;
-			/* Additional sense length */
-			sense[7] = 0xa;	/* 10 bytes */
-			/* Additional sense code */
-			sense[12] = asc;
-		}
-	}
-
-	send_iu(iue, sizeof(iu->srp.rsp) + SRP_RSP_SENSE_DATA_LEN,
-		VIOSRP_SRP_FORMAT);
-
-	return 0;
-}
-
-static void handle_cmd_queue(struct srp_target *target)
-{
-	struct Scsi_Host *shost = target->shost;
-	struct srp_rport *rport = target_to_port(target)->rport;
-	struct iu_entry *iue;
-	struct srp_cmd *cmd;
-	unsigned long flags;
-	int err;
-
-retry:
-	spin_lock_irqsave(&target->lock, flags);
-
-	list_for_each_entry(iue, &target->cmd_queue, ilist) {
-		if (!test_and_set_bit(V_FLYING, &iue->flags)) {
-			spin_unlock_irqrestore(&target->lock, flags);
-			cmd = iue->sbuf->buf;
-			err = srp_cmd_queue(shost, cmd, iue,
-					    (unsigned long)rport, 0);
-			if (err) {
-				eprintk("cannot queue cmd %p %d\n", cmd, err);
-				srp_iu_put(iue);
-			}
-			goto retry;
-		}
-	}
-
-	spin_unlock_irqrestore(&target->lock, flags);
-}
-
-static int ibmvstgt_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
-			 struct srp_direct_buf *md, int nmd,
-			 enum dma_data_direction dir, unsigned int rest)
-{
-	struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr;
-	struct srp_target *target = iue->target;
-	struct vio_port *vport = target_to_port(target);
-	dma_addr_t token;
-	long err;
-	unsigned int done = 0;
-	int i, sidx, soff;
-
-	sidx = soff = 0;
-	token = sg_dma_address(sg + sidx);
-
-	for (i = 0; i < nmd && rest; i++) {
-		unsigned int mdone, mlen;
-
-		mlen = min(rest, md[i].len);
-		for (mdone = 0; mlen;) {
-			int slen = min(sg_dma_len(sg + sidx) - soff, mlen);
-
-			if (dir == DMA_TO_DEVICE)
-				err = h_copy_rdma(slen,
-						  vport->riobn,
-						  md[i].va + mdone,
-						  vport->liobn,
-						  token + soff);
-			else
-				err = h_copy_rdma(slen,
-						  vport->liobn,
-						  token + soff,
-						  vport->riobn,
-						  md[i].va + mdone);
-
-			if (err != H_SUCCESS) {
-				eprintk("rdma error %d %d %ld\n", dir, slen, err);
-				return -EIO;
-			}
-
-			mlen -= slen;
-			mdone += slen;
-			soff += slen;
-			done += slen;
-
-			if (soff == sg_dma_len(sg + sidx)) {
-				sidx++;
-				soff = 0;
-				token = sg_dma_address(sg + sidx);
-
-				if (sidx > nsg) {
-					eprintk("out of sg %p %d %d\n",
-						iue, sidx, nsg);
-					return -EIO;
-				}
-			}
-		};
-
-		rest -= mlen;
-	}
-	return 0;
-}
-
-static int ibmvstgt_cmd_done(struct scsi_cmnd *sc,
-			     void (*done)(struct scsi_cmnd *))
-{
-	unsigned long flags;
-	struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr;
-	struct srp_target *target = iue->target;
-	int err = 0;
-
-	dprintk("%p %p %x %u\n", iue, target, vio_iu(iue)->srp.cmd.cdb[0],
-		scsi_sg_count(sc));
-
-	if (scsi_sg_count(sc))
-		err = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd, ibmvstgt_rdma, 1, 1);
-
-	spin_lock_irqsave(&target->lock, flags);
-	list_del(&iue->ilist);
-	spin_unlock_irqrestore(&target->lock, flags);
-
-	if (err|| sc->result != SAM_STAT_GOOD) {
-		eprintk("operation failed %p %d %x\n",
-			iue, sc->result, vio_iu(iue)->srp.cmd.cdb[0]);
-		send_rsp(iue, sc, HARDWARE_ERROR, 0x00);
-	} else
-		send_rsp(iue, sc, NO_SENSE, 0x00);
-
-	done(sc);
-	srp_iu_put(iue);
-	return 0;
-}
-
-int send_adapter_info(struct iu_entry *iue,
-		      dma_addr_t remote_buffer, uint16_t length)
-{
-	struct srp_target *target = iue->target;
-	struct vio_port *vport = target_to_port(target);
-	struct Scsi_Host *shost = target->shost;
-	dma_addr_t data_token;
-	struct mad_adapter_info_data *info;
-	int err;
-
-	info = dma_alloc_coherent(target->dev, sizeof(*info), &data_token,
-				  GFP_KERNEL);
-	if (!info) {
-		eprintk("bad dma_alloc_coherent %p\n", target);
-		return 1;
-	}
-
-	/* Get remote info */
-	err = h_copy_rdma(sizeof(*info), vport->riobn, remote_buffer,
-			  vport->liobn, data_token);
-	if (err == H_SUCCESS) {
-		dprintk("Client connect: %s (%d)\n",
-			info->partition_name, info->partition_number);
-	}
-
-	memset(info, 0, sizeof(*info));
-
-	strcpy(info->srp_version, "16.a");
-	strncpy(info->partition_name, partition_name,
-		sizeof(info->partition_name));
-	info->partition_number = partition_number;
-	info->mad_version = 1;
-	info->os_type = 2;
-	info->port_max_txu[0] = shost->hostt->max_sectors << 9;
-
-	/* Send our info to remote */
-	err = h_copy_rdma(sizeof(*info), vport->liobn, data_token,
-			  vport->riobn, remote_buffer);
-
-	dma_free_coherent(target->dev, sizeof(*info), info, data_token);
-
-	if (err != H_SUCCESS) {
-		eprintk("Error sending adapter info %d\n", err);
-		return 1;
-	}
-
-	return 0;
-}
-
-static void process_login(struct iu_entry *iue)
-{
-	union viosrp_iu *iu = vio_iu(iue);
-	struct srp_login_rsp *rsp = &iu->srp.login_rsp;
-	uint64_t tag = iu->srp.rsp.tag;
-	struct Scsi_Host *shost = iue->target->shost;
-	struct srp_target *target = host_to_srp_target(shost);
-	struct vio_port *vport = target_to_port(target);
-	struct srp_rport_identifiers ids;
-
-	memset(&ids, 0, sizeof(ids));
-	sprintf(ids.port_id, "%x", vport->dma_dev->unit_address);
-	ids.roles = SRP_RPORT_ROLE_INITIATOR;
-	if (!vport->rport)
-		vport->rport = srp_rport_add(shost, &ids);
-
-	/* TODO handle case that requested size is wrong and
-	 * buffer format is wrong
-	 */
-	memset(iu, 0, sizeof(struct srp_login_rsp));
-	rsp->opcode = SRP_LOGIN_RSP;
-	rsp->req_lim_delta = INITIAL_SRP_LIMIT;
-	rsp->tag = tag;
-	rsp->max_it_iu_len = sizeof(union srp_iu);
-	rsp->max_ti_iu_len = sizeof(union srp_iu);
-	/* direct and indirect */
-	rsp->buf_fmt = SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT;
-
-	send_iu(iue, sizeof(*rsp), VIOSRP_SRP_FORMAT);
-}
-
-static inline void queue_cmd(struct iu_entry *iue)
-{
-	struct srp_target *target = iue->target;
-	unsigned long flags;
-
-	spin_lock_irqsave(&target->lock, flags);
-	list_add_tail(&iue->ilist, &target->cmd_queue);
-	spin_unlock_irqrestore(&target->lock, flags);
-}
-
-static int process_tsk_mgmt(struct iu_entry *iue)
-{
-	union viosrp_iu *iu = vio_iu(iue);
-	int fn;
-
-	dprintk("%p %u\n", iue, iu->srp.tsk_mgmt.tsk_mgmt_func);
-
-	switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
-	case SRP_TSK_ABORT_TASK:
-		fn = ABORT_TASK;
-		break;
-	case SRP_TSK_ABORT_TASK_SET:
-		fn = ABORT_TASK_SET;
-		break;
-	case SRP_TSK_CLEAR_TASK_SET:
-		fn = CLEAR_TASK_SET;
-		break;
-	case SRP_TSK_LUN_RESET:
-		fn = LOGICAL_UNIT_RESET;
-		break;
-	case SRP_TSK_CLEAR_ACA:
-		fn = CLEAR_ACA;
-		break;
-	default:
-		fn = 0;
-	}
-	if (fn)
-		scsi_tgt_tsk_mgmt_request(iue->target->shost,
-					  (unsigned long)iue->target->shost,
-					  fn,
-					  iu->srp.tsk_mgmt.task_tag,
-					  (struct scsi_lun *) &iu->srp.tsk_mgmt.lun,
-					  iue);
-	else
-		send_rsp(iue, NULL, ILLEGAL_REQUEST, 0x20);
-
-	return !fn;
-}
-
-static int process_mad_iu(struct iu_entry *iue)
-{
-	union viosrp_iu *iu = vio_iu(iue);
-	struct viosrp_adapter_info *info;
-	struct viosrp_host_config *conf;
-
-	switch (iu->mad.empty_iu.common.type) {
-	case VIOSRP_EMPTY_IU_TYPE:
-		eprintk("%s\n", "Unsupported EMPTY MAD IU");
-		break;
-	case VIOSRP_ERROR_LOG_TYPE:
-		eprintk("%s\n", "Unsupported ERROR LOG MAD IU");
-		iu->mad.error_log.common.status = 1;
-		send_iu(iue, sizeof(iu->mad.error_log),	VIOSRP_MAD_FORMAT);
-		break;
-	case VIOSRP_ADAPTER_INFO_TYPE:
-		info = &iu->mad.adapter_info;
-		info->common.status = send_adapter_info(iue, info->buffer,
-							info->common.length);
-		send_iu(iue, sizeof(*info), VIOSRP_MAD_FORMAT);
-		break;
-	case VIOSRP_HOST_CONFIG_TYPE:
-		conf = &iu->mad.host_config;
-		conf->common.status = 1;
-		send_iu(iue, sizeof(*conf), VIOSRP_MAD_FORMAT);
-		break;
-	default:
-		eprintk("Unknown type %u\n", iu->srp.rsp.opcode);
-	}
-
-	return 1;
-}
-
-static int process_srp_iu(struct iu_entry *iue)
-{
-	union viosrp_iu *iu = vio_iu(iue);
-	int done = 1;
-	u8 opcode = iu->srp.rsp.opcode;
-
-	switch (opcode) {
-	case SRP_LOGIN_REQ:
-		process_login(iue);
-		break;
-	case SRP_TSK_MGMT:
-		done = process_tsk_mgmt(iue);
-		break;
-	case SRP_CMD:
-		queue_cmd(iue);
-		done = 0;
-		break;
-	case SRP_LOGIN_RSP:
-	case SRP_I_LOGOUT:
-	case SRP_T_LOGOUT:
-	case SRP_RSP:
-	case SRP_CRED_REQ:
-	case SRP_CRED_RSP:
-	case SRP_AER_REQ:
-	case SRP_AER_RSP:
-		eprintk("Unsupported type %u\n", opcode);
-		break;
-	default:
-		eprintk("Unknown type %u\n", opcode);
-	}
-
-	return done;
-}
-
-static void process_iu(struct viosrp_crq *crq, struct srp_target *target)
-{
-	struct vio_port *vport = target_to_port(target);
-	struct iu_entry *iue;
-	long err;
-	int done = 1;
-
-	iue = srp_iu_get(target);
-	if (!iue) {
-		eprintk("Error getting IU from pool, %p\n", target);
-		return;
-	}
-
-	iue->remote_token = crq->IU_data_ptr;
-
-	err = h_copy_rdma(crq->IU_length, vport->riobn,
-			  iue->remote_token, vport->liobn, iue->sbuf->dma);
-
-	if (err != H_SUCCESS) {
-		eprintk("%ld transferring data error %p\n", err, iue);
-		goto out;
-	}
-
-	if (crq->format == VIOSRP_MAD_FORMAT)
-		done = process_mad_iu(iue);
-	else
-		done = process_srp_iu(iue);
-out:
-	if (done)
-		srp_iu_put(iue);
-}
-
-static irqreturn_t ibmvstgt_interrupt(int dummy, void *data)
-{
-	struct srp_target *target = data;
-	struct vio_port *vport = target_to_port(target);
-
-	vio_disable_interrupts(vport->dma_dev);
-	queue_work(vtgtd, &vport->crq_work);
-
-	return IRQ_HANDLED;
-}
-
-static int crq_queue_create(struct crq_queue *queue, struct srp_target *target)
-{
-	int err;
-	struct vio_port *vport = target_to_port(target);
-
-	queue->msgs = (struct viosrp_crq *) get_zeroed_page(GFP_KERNEL);
-	if (!queue->msgs)
-		goto malloc_failed;
-	queue->size = PAGE_SIZE / sizeof(*queue->msgs);
-
-	queue->msg_token = dma_map_single(target->dev, queue->msgs,
-					  queue->size * sizeof(*queue->msgs),
-					  DMA_BIDIRECTIONAL);
-
-	if (dma_mapping_error(target->dev, queue->msg_token))
-		goto map_failed;
-
-	err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token,
-			PAGE_SIZE);
-
-	/* If the adapter was left active for some reason (like kexec)
-	 * try freeing and re-registering
-	 */
-	if (err == H_RESOURCE) {
-	    do {
-		err = h_free_crq(vport->dma_dev->unit_address);
-	    } while (err == H_BUSY || H_IS_LONG_BUSY(err));
-
-	    err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token,
-			    PAGE_SIZE);
-	}
-
-	if (err != H_SUCCESS && err != 2) {
-		eprintk("Error 0x%x opening virtual adapter\n", err);
-		goto reg_crq_failed;
-	}
-
-	err = request_irq(vport->dma_dev->irq, &ibmvstgt_interrupt,
-			  0, "ibmvstgt", target);
-	if (err)
-		goto req_irq_failed;
-
-	vio_enable_interrupts(vport->dma_dev);
-
-	h_send_crq(vport->dma_dev->unit_address, 0xC001000000000000, 0);
-
-	queue->cur = 0;
-	spin_lock_init(&queue->lock);
-
-	return 0;
-
-req_irq_failed:
-	do {
-		err = h_free_crq(vport->dma_dev->unit_address);
-	} while (err == H_BUSY || H_IS_LONG_BUSY(err));
-
-reg_crq_failed:
-	dma_unmap_single(target->dev, queue->msg_token,
-			 queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
-map_failed:
-	free_page((unsigned long) queue->msgs);
-
-malloc_failed:
-	return -ENOMEM;
-}
-
-static void crq_queue_destroy(struct srp_target *target)
-{
-	struct vio_port *vport = target_to_port(target);
-	struct crq_queue *queue = &vport->crq_queue;
-	int err;
-
-	free_irq(vport->dma_dev->irq, target);
-	do {
-		err = h_free_crq(vport->dma_dev->unit_address);
-	} while (err == H_BUSY || H_IS_LONG_BUSY(err));
-
-	dma_unmap_single(target->dev, queue->msg_token,
-			 queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
-
-	free_page((unsigned long) queue->msgs);
-}
-
-static void process_crq(struct viosrp_crq *crq,	struct srp_target *target)
-{
-	struct vio_port *vport = target_to_port(target);
-	dprintk("%x %x\n", crq->valid, crq->format);
-
-	switch (crq->valid) {
-	case 0xC0:
-		/* initialization */
-		switch (crq->format) {
-		case 0x01:
-			h_send_crq(vport->dma_dev->unit_address,
-				   0xC002000000000000, 0);
-			break;
-		case 0x02:
-			break;
-		default:
-			eprintk("Unknown format %u\n", crq->format);
-		}
-		break;
-	case 0xFF:
-		/* transport event */
-		break;
-	case 0x80:
-		/* real payload */
-		switch (crq->format) {
-		case VIOSRP_SRP_FORMAT:
-		case VIOSRP_MAD_FORMAT:
-			process_iu(crq, target);
-			break;
-		case VIOSRP_OS400_FORMAT:
-		case VIOSRP_AIX_FORMAT:
-		case VIOSRP_LINUX_FORMAT:
-		case VIOSRP_INLINE_FORMAT:
-			eprintk("Unsupported format %u\n", crq->format);
-			break;
-		default:
-			eprintk("Unknown format %u\n", crq->format);
-		}
-		break;
-	default:
-		eprintk("unknown message type 0x%02x!?\n", crq->valid);
-	}
-}
-
-static inline struct viosrp_crq *next_crq(struct crq_queue *queue)
-{
-	struct viosrp_crq *crq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&queue->lock, flags);
-	crq = &queue->msgs[queue->cur];
-	if (crq->valid & 0x80) {
-		if (++queue->cur == queue->size)
-			queue->cur = 0;
-	} else
-		crq = NULL;
-	spin_unlock_irqrestore(&queue->lock, flags);
-
-	return crq;
-}
-
-static void handle_crq(struct work_struct *work)
-{
-	struct vio_port *vport = container_of(work, struct vio_port, crq_work);
-	struct srp_target *target = vport->target;
-	struct viosrp_crq *crq;
-	int done = 0;
-
-	while (!done) {
-		while ((crq = next_crq(&vport->crq_queue)) != NULL) {
-			process_crq(crq, target);
-			crq->valid = 0x00;
-		}
-
-		vio_enable_interrupts(vport->dma_dev);
-
-		crq = next_crq(&vport->crq_queue);
-		if (crq) {
-			vio_disable_interrupts(vport->dma_dev);
-			process_crq(crq, target);
-			crq->valid = 0x00;
-		} else
-			done = 1;
-	}
-
-	handle_cmd_queue(target);
-}
-
-
-static int ibmvstgt_eh_abort_handler(struct scsi_cmnd *sc)
-{
-	unsigned long flags;
-	struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr;
-	struct srp_target *target = iue->target;
-
-	dprintk("%p %p %x\n", iue, target, vio_iu(iue)->srp.cmd.cdb[0]);
-
-	spin_lock_irqsave(&target->lock, flags);
-	list_del(&iue->ilist);
-	spin_unlock_irqrestore(&target->lock, flags);
-
-	srp_iu_put(iue);
-
-	return 0;
-}
-
-static int ibmvstgt_tsk_mgmt_response(struct Scsi_Host *shost,
-				      u64 itn_id, u64 mid, int result)
-{
-	struct iu_entry *iue = (struct iu_entry *) ((void *) mid);
-	union viosrp_iu *iu = vio_iu(iue);
-	unsigned char status, asc;
-
-	eprintk("%p %d\n", iue, result);
-	status = NO_SENSE;
-	asc = 0;
-
-	switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
-	case SRP_TSK_ABORT_TASK:
-		asc = 0x14;
-		if (result)
-			status = ABORTED_COMMAND;
-		break;
-	default:
-		break;
-	}
-
-	send_rsp(iue, NULL, status, asc);
-	srp_iu_put(iue);
-
-	return 0;
-}
-
-static int ibmvstgt_it_nexus_response(struct Scsi_Host *shost, u64 itn_id,
-				      int result)
-{
-	struct srp_target *target = host_to_srp_target(shost);
-	struct vio_port *vport = target_to_port(target);
-
-	if (result) {
-		eprintk("%p %d\n", shost, result);
-		srp_rport_del(vport->rport);
-		vport->rport = NULL;
-	}
-	return 0;
-}
-
-static ssize_t system_id_show(struct device *dev,
-			      struct device_attribute *attr, char *buf)
-{
-	return snprintf(buf, PAGE_SIZE, "%s\n", system_id);
-}
-
-static ssize_t partition_number_show(struct device *dev,
-				     struct device_attribute *attr, char *buf)
-{
-	return snprintf(buf, PAGE_SIZE, "%x\n", partition_number);
-}
-
-static ssize_t unit_address_show(struct device *dev,
-				  struct device_attribute *attr, char *buf)
-{
-	struct Scsi_Host *shost = class_to_shost(dev);
-	struct srp_target *target = host_to_srp_target(shost);
-	struct vio_port *vport = target_to_port(target);
-	return snprintf(buf, PAGE_SIZE, "%x\n", vport->dma_dev->unit_address);
-}
-
-static DEVICE_ATTR(system_id, S_IRUGO, system_id_show, NULL);
-static DEVICE_ATTR(partition_number, S_IRUGO, partition_number_show, NULL);
-static DEVICE_ATTR(unit_address, S_IRUGO, unit_address_show, NULL);
-
-static struct device_attribute *ibmvstgt_attrs[] = {
-	&dev_attr_system_id,
-	&dev_attr_partition_number,
-	&dev_attr_unit_address,
-	NULL,
-};
-
-static struct scsi_host_template ibmvstgt_sht = {
-	.name			= TGT_NAME,
-	.module			= THIS_MODULE,
-	.can_queue		= INITIAL_SRP_LIMIT,
-	.sg_tablesize		= SG_ALL,
-	.use_clustering		= DISABLE_CLUSTERING,
-	.max_sectors		= DEFAULT_MAX_SECTORS,
-	.transfer_response	= ibmvstgt_cmd_done,
-	.eh_abort_handler	= ibmvstgt_eh_abort_handler,
-	.shost_attrs		= ibmvstgt_attrs,
-	.proc_name		= TGT_NAME,
-	.supported_mode		= MODE_TARGET,
-};
-
-static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)
-{
-	struct Scsi_Host *shost;
-	struct srp_target *target;
-	struct vio_port *vport;
-	unsigned int *dma, dma_size;
-	int err = -ENOMEM;
-
-	vport = kzalloc(sizeof(struct vio_port), GFP_KERNEL);
-	if (!vport)
-		return err;
-	shost = scsi_host_alloc(&ibmvstgt_sht, sizeof(struct srp_target));
-	if (!shost)
-		goto free_vport;
-	shost->transportt = ibmvstgt_transport_template;
-
-	target = host_to_srp_target(shost);
-	target->shost = shost;
-	vport->dma_dev = dev;
-	target->ldata = vport;
-	vport->target = target;
-	err = srp_target_alloc(target, &dev->dev, INITIAL_SRP_LIMIT,
-			       SRP_MAX_IU_LEN);
-	if (err)
-		goto put_host;
-
-	dma = (unsigned int *) vio_get_attribute(dev, "ibm,my-dma-window",
-						 &dma_size);
-	if (!dma || dma_size != 40) {
-		eprintk("Couldn't get window property %d\n", dma_size);
-		err = -EIO;
-		goto free_srp_target;
-	}
-	vport->liobn = dma[0];
-	vport->riobn = dma[5];
-
-	INIT_WORK(&vport->crq_work, handle_crq);
-
-	err = scsi_add_host(shost, target->dev);
-	if (err)
-		goto free_srp_target;
-
-	err = scsi_tgt_alloc_queue(shost);
-	if (err)
-		goto remove_host;
-
-	err = crq_queue_create(&vport->crq_queue, target);
-	if (err)
-		goto free_queue;
-
-	return 0;
-free_queue:
-	scsi_tgt_free_queue(shost);
-remove_host:
-	scsi_remove_host(shost);
-free_srp_target:
-	srp_target_free(target);
-put_host:
-	scsi_host_put(shost);
-free_vport:
-	kfree(vport);
-	return err;
-}
-
-static int ibmvstgt_remove(struct vio_dev *dev)
-{
-	struct srp_target *target = dev_get_drvdata(&dev->dev);
-	struct Scsi_Host *shost = target->shost;
-	struct vio_port *vport = target->ldata;
-
-	crq_queue_destroy(target);
-	srp_remove_host(shost);
-	scsi_remove_host(shost);
-	scsi_tgt_free_queue(shost);
-	srp_target_free(target);
-	kfree(vport);
-	scsi_host_put(shost);
-	return 0;
-}
-
-static struct vio_device_id ibmvstgt_device_table[] = {
-	{"v-scsi-host", "IBM,v-scsi-host"},
-	{"",""}
-};
-
-MODULE_DEVICE_TABLE(vio, ibmvstgt_device_table);
-
-static struct vio_driver ibmvstgt_driver = {
-	.id_table = ibmvstgt_device_table,
-	.probe = ibmvstgt_probe,
-	.remove = ibmvstgt_remove,
-	.name = "ibmvscsis",
-};
-
-static int get_system_info(void)
-{
-	struct device_node *rootdn;
-	const char *id, *model, *name;
-	const unsigned int *num;
-
-	rootdn = of_find_node_by_path("/");
-	if (!rootdn)
-		return -ENOENT;
-
-	model = of_get_property(rootdn, "model", NULL);
-	id = of_get_property(rootdn, "system-id", NULL);
-	if (model && id)
-		snprintf(system_id, sizeof(system_id), "%s-%s", model, id);
-
-	name = of_get_property(rootdn, "ibm,partition-name", NULL);
-	if (name)
-		strncpy(partition_name, name, sizeof(partition_name));
-
-	num = of_get_property(rootdn, "ibm,partition-no", NULL);
-	if (num)
-		partition_number = *num;
-
-	of_node_put(rootdn);
-	return 0;
-}
-
-static struct srp_function_template ibmvstgt_transport_functions = {
-	.tsk_mgmt_response = ibmvstgt_tsk_mgmt_response,
-	.it_nexus_response = ibmvstgt_it_nexus_response,
-};
-
-static int __init ibmvstgt_init(void)
-{
-	int err = -ENOMEM;
-
-	printk("IBM eServer i/pSeries Virtual SCSI Target Driver\n");
-
-	ibmvstgt_transport_template =
-		srp_attach_transport(&ibmvstgt_transport_functions);
-	if (!ibmvstgt_transport_template)
-		return err;
-
-	vtgtd = create_workqueue("ibmvtgtd");
-	if (!vtgtd)
-		goto release_transport;
-
-	err = get_system_info();
-	if (err)
-		goto destroy_wq;
-
-	err = vio_register_driver(&ibmvstgt_driver);
-	if (err)
-		goto destroy_wq;
-
-	return 0;
-destroy_wq:
-	destroy_workqueue(vtgtd);
-release_transport:
-	srp_release_transport(ibmvstgt_transport_template);
-	return err;
-}
-
-static void __exit ibmvstgt_exit(void)
-{
-	printk("Unregister IBM virtual SCSI driver\n");
-
-	destroy_workqueue(vtgtd);
-	vio_unregister_driver(&ibmvstgt_driver);
-	srp_release_transport(ibmvstgt_transport_template);
-}
-
-MODULE_DESCRIPTION("IBM Virtual SCSI Target");
-MODULE_AUTHOR("Santiago Leon");
-MODULE_LICENSE("GPL");
-
-module_init(ibmvstgt_init);
-module_exit(ibmvstgt_exit);