[SCSI] aic79xx: update to use scsi_transport_spi

This patch updates the aic79xx driver to take advantage of the
scsi_transport_spi infrastructure. Patch is quite a mess as some
procedures have been reshuffled to be closer to the aic7xxx driver.

Rejections fixed and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/aic7xxx/aic79xx_osm.c

@@ -46,6 +46,8 @@
 #include "aic79xx_inline.h"
 #include <scsi/scsicam.h>
 
+static struct scsi_transport_template *ahd_linux_transport_template = NULL;
+
 /*
  * Include aiclib.c as part of our
  * "module dependencies are hard" work around.
@@ -54,6 +56,7 @@
 
 #include <linux/init.h>		/* __setup */
 #include <linux/mm.h>		/* For fetching system memory size */
+#include <linux/blkdev.h>		/* For block_size() */
 #include <linux/delay.h>	/* For ssleep/msleep */
 
 /*
@@ -177,71 +180,6 @@ static adapter_tag_info_t aic79xx_tag_info[] =
 	{AIC79XX_CONFIGED_TAG_COMMANDS}
 };
 
-/*
- * By default, read streaming is disabled.  In theory,
- * read streaming should enhance performance, but early
- * U320 drive firmware actually performs slower with
- * read streaming enabled.
- */
-#ifdef CONFIG_AIC79XX_ENABLE_RD_STRM
-#define AIC79XX_CONFIGED_RD_STRM 0xFFFF
-#else
-#define AIC79XX_CONFIGED_RD_STRM 0
-#endif
-
-static uint16_t aic79xx_rd_strm_info[] =
-{
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM,
-	AIC79XX_CONFIGED_RD_STRM
-};
-
-/*
- * DV option:
- *
- * positive value = DV Enabled
- * zero		  = DV Disabled
- * negative value = DV Default for adapter type/seeprom
- */
-#ifdef CONFIG_AIC79XX_DV_SETTING
-#define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING
-#else
-#define AIC79XX_CONFIGED_DV -1
-#endif
-
-static int8_t aic79xx_dv_settings[] =
-{
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV,
-	AIC79XX_CONFIGED_DV
-};
-
 /*
  * The I/O cell on the chip is very configurable in respect to its analog
  * characteristics.  Set the defaults here; they can be overriden with
@@ -402,7 +340,7 @@ MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
-module_param(aic79xx, charp, 0);
+module_param(aic79xx, charp, 0444);
 MODULE_PARM_DESC(aic79xx,
 "period delimited, options string.\n"
 "	verbose			Enable verbose/diagnostic logging\n"
@@ -417,8 +355,6 @@ MODULE_PARM_DESC(aic79xx,
 "	reverse_scan		Sort PCI devices highest Bus/Slot to lowest\n"
 "	tag_info:<tag_str>	Set per-target tag depth\n"
 "	global_tag_depth:<int>	Global tag depth for all targets on all buses\n"
-"	rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n"
-"	dv:<dv_settings>	Set per-controller Domain Validation Setting.\n"
 "	slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 "	precomp:<pcomp_list>	Set the signal precompensation (0-7).\n"
 "	amplitude:<int>		Set the signal amplitude (0-7).\n"
@@ -431,178 +367,35 @@ MODULE_PARM_DESC(aic79xx,
 "		Shorten the selection timeout to 128ms\n"
 "\n"
 "	options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
-"\n"
-"	Sample /etc/modprobe.conf line:\n"
-"		Change Read Streaming for Controller's 2 and 3\n"
-"\n"
-"	options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'");
+"\n");
 
 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
-					 struct ahd_linux_device *,
+					 struct scsi_device *,
 					 struct scb *);
 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
-					 Scsi_Cmnd *cmd);
-static void ahd_linux_filter_inquiry(struct ahd_softc *ahd,
-				     struct ahd_devinfo *devinfo);
-static void ahd_linux_dev_timed_unfreeze(u_long arg);
+					 struct scsi_cmnd *cmd);
 static void ahd_linux_sem_timeout(u_long arg);
+static int  ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
-static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
-static void ahd_linux_start_dv(struct ahd_softc *ahd);
-static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
-static int  ahd_linux_dv_thread(void *data);
-static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd);
-static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target);
-static void ahd_linux_dv_transition(struct ahd_softc *ahd,
-				    struct scsi_cmnd *cmd,
-				    struct ahd_devinfo *devinfo,
-				    struct ahd_linux_target *targ);
-static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd,
-				  struct scsi_cmnd *cmd,
-				  struct ahd_devinfo *devinfo);
-static void ahd_linux_dv_inq(struct ahd_softc *ahd,
-			     struct scsi_cmnd *cmd,
-			     struct ahd_devinfo *devinfo,
-			     struct ahd_linux_target *targ,
-			     u_int request_length);
-static void ahd_linux_dv_tur(struct ahd_softc *ahd,
-			     struct scsi_cmnd *cmd,
-			     struct ahd_devinfo *devinfo);
-static void ahd_linux_dv_rebd(struct ahd_softc *ahd,
-			      struct scsi_cmnd *cmd,
-			      struct ahd_devinfo *devinfo,
-			      struct ahd_linux_target *targ);
-static void ahd_linux_dv_web(struct ahd_softc *ahd,
-			     struct scsi_cmnd *cmd,
-			     struct ahd_devinfo *devinfo,
-			     struct ahd_linux_target *targ);
-static void ahd_linux_dv_reb(struct ahd_softc *ahd,
-			     struct scsi_cmnd *cmd,
-			     struct ahd_devinfo *devinfo,
-			     struct ahd_linux_target *targ);
-static void ahd_linux_dv_su(struct ahd_softc *ahd,
-			    struct scsi_cmnd *cmd,
-			    struct ahd_devinfo *devinfo,
-			    struct ahd_linux_target *targ);
-static int ahd_linux_fallback(struct ahd_softc *ahd,
-			      struct ahd_devinfo *devinfo);
-static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd,
-					  struct ahd_devinfo *devinfo);
-static void ahd_linux_dv_complete(Scsi_Cmnd *cmd);
-static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ);
 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 				     struct ahd_devinfo *devinfo);
-static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd);
-static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd);
-static void ahd_linux_device_queue_depth(struct ahd_softc *ahd,
-					 struct ahd_linux_device *dev);
-static struct ahd_linux_target*	ahd_linux_alloc_target(struct ahd_softc*,
-						       u_int, u_int);
-static void			ahd_linux_free_target(struct ahd_softc*,
-						      struct ahd_linux_target*);
-static struct ahd_linux_device*	ahd_linux_alloc_device(struct ahd_softc*,
-						       struct ahd_linux_target*,
-						       u_int);
-static void			ahd_linux_free_device(struct ahd_softc*,
-						      struct ahd_linux_device*);
+static void ahd_linux_device_queue_depth(struct scsi_device *);
 static int ahd_linux_run_command(struct ahd_softc*,
-				 struct ahd_linux_device*,
+				 struct ahd_linux_device *,
 				 struct scsi_cmnd *);
 static void ahd_linux_setup_tag_info_global(char *p);
 static aic_option_callback_t ahd_linux_setup_tag_info;
-static aic_option_callback_t ahd_linux_setup_rd_strm_info;
-static aic_option_callback_t ahd_linux_setup_dv;
 static aic_option_callback_t ahd_linux_setup_iocell_info;
-static int ahd_linux_next_unit(void);
-static int aic79xx_setup(char *c);
+static int  aic79xx_setup(char *c);
+static int  ahd_linux_next_unit(void);
 
 /****************************** Inlines ***************************************/
-static __inline void ahd_schedule_completeq(struct ahd_softc *ahd);
-static __inline struct ahd_linux_device*
-		     ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
-					  u_int target, u_int lun, int alloc);
-static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd);
 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 
-static __inline void
-ahd_schedule_completeq(struct ahd_softc *ahd)
-{
-	if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) {
-		ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER;
-		ahd->platform_data->completeq_timer.expires = jiffies;
-		add_timer(&ahd->platform_data->completeq_timer);
-	}
-}
-
-static __inline struct ahd_linux_device*
-ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
-		     u_int lun, int alloc)
-{
-	struct ahd_linux_target *targ;
-	struct ahd_linux_device *dev;
-	u_int target_offset;
-
-	target_offset = target;
-	if (channel != 0)
-		target_offset += 8;
-	targ = ahd->platform_data->targets[target_offset];
-	if (targ == NULL) {
-		if (alloc != 0) {
-			targ = ahd_linux_alloc_target(ahd, channel, target);
-			if (targ == NULL)
-				return (NULL);
-		} else
-			return (NULL);
-	}
-	dev = targ->devices[lun];
-	if (dev == NULL && alloc != 0)
-		dev = ahd_linux_alloc_device(ahd, targ, lun);
-	return (dev);
-}
-
-#define AHD_LINUX_MAX_RETURNED_ERRORS 4
-static struct ahd_cmd *
-ahd_linux_run_complete_queue(struct ahd_softc *ahd)
-{	
-	struct	ahd_cmd *acmd;
-	u_long	done_flags;
-	int	with_errors;
-
-	with_errors = 0;
-	ahd_done_lock(ahd, &done_flags);
-	while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) {
-		Scsi_Cmnd *cmd;
-
-		if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) {
-			/*
-			 * Linux uses stack recursion to requeue
-			 * commands that need to be retried.  Avoid
-			 * blowing out the stack by "spoon feeding"
-			 * commands that completed with error back
-			 * the operating system in case they are going
-			 * to be retried. "ick"
-			 */
-			ahd_schedule_completeq(ahd);
-			break;
-		}
-		TAILQ_REMOVE(&ahd->platform_data->completeq,
-			     acmd, acmd_links.tqe);
-		cmd = &acmd_scsi_cmd(acmd);
-		cmd->host_scribble = NULL;
-		if (ahd_cmd_get_transaction_status(cmd) != DID_OK
-		 || (cmd->result & 0xFF) != SCSI_STATUS_OK)
-			with_errors++;
-
-		cmd->scsi_done(cmd);
-	}
-	ahd_done_unlock(ahd, &done_flags);
-	return (acmd);
-}
-
 static __inline void
 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 {
-	Scsi_Cmnd *cmd;
+	struct scsi_cmnd *cmd;
 	int direction;
 
 	cmd = scb->io_ctx;
@@ -624,51 +417,21 @@ ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 #define BUILD_SCSIID(ahd, cmd)						\
 	((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
 
-/************************  Host template entry points *************************/
-static int	   ahd_linux_detect(Scsi_Host_Template *);
-static const char *ahd_linux_info(struct Scsi_Host *);
-static int	   ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
-static int	   ahd_linux_slave_alloc(Scsi_Device *);
-static int	   ahd_linux_slave_configure(Scsi_Device *);
-static void	   ahd_linux_slave_destroy(Scsi_Device *);
-#if defined(__i386__)
-static int	   ahd_linux_biosparam(struct scsi_device*,
-				       struct block_device*, sector_t, int[]);
-#endif
-static int	   ahd_linux_bus_reset(Scsi_Cmnd *);
-static int	   ahd_linux_dev_reset(Scsi_Cmnd *);
-static int	   ahd_linux_abort(Scsi_Cmnd *);
-
-
 /*
  * Try to detect an Adaptec 79XX controller.
  */
 static int
-ahd_linux_detect(Scsi_Host_Template *template)
+ahd_linux_detect(struct scsi_host_template *template)
 {
 	struct	ahd_softc *ahd;
 	int     found;
 	int	error = 0;
 
-	/*
-	 * Sanity checking of Linux SCSI data structures so
-	 * that some of our hacks^H^H^H^H^Hassumptions aren't
-	 * violated.
-	 */
-	if (offsetof(struct ahd_cmd_internal, end)
-	  > offsetof(struct scsi_cmnd, host_scribble)) {
-		printf("ahd_linux_detect: SCSI data structures changed.\n");
-		printf("ahd_linux_detect: Unable to attach\n");
-		return (0);
-	}
-
-#ifdef MODULE
 	/*
 	 * If we've been passed any parameters, process them now.
 	 */
 	if (aic79xx)
 		aic79xx_setup(aic79xx);
-#endif
 
 	template->proc_name = "aic79xx";
 
@@ -695,7 +458,7 @@ ahd_linux_detect(Scsi_Host_Template *template)
 			found++;
 	}
 	aic79xx_detect_complete++;
-	return 0;
+	return found;
 }
 
 /*
@@ -730,10 +493,10 @@ ahd_linux_info(struct Scsi_Host *host)
  * Queue an SCB to the controller.
  */
 static int
-ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
+ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 {
 	struct	 ahd_softc *ahd;
-	struct	 ahd_linux_device *dev;
+	struct	 ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 
 	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 
@@ -743,8 +506,7 @@ ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
 	 * DV commands through so long as we are only frozen to
 	 * perform DV.
 	 */
-	if (ahd->platform_data->qfrozen != 0
-	 && AHD_DV_CMD(cmd) == 0) {
+	if (ahd->platform_data->qfrozen != 0) {
 		printf("%s: queue frozen\n", ahd_name(ahd));
 
 		return SCSI_MLQUEUE_HOST_BUSY;
@@ -755,86 +517,142 @@ ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
 	 */
 	cmd->scsi_done = scsi_done;
 
-	dev = ahd_linux_get_device(ahd, cmd->device->channel,
-				   cmd->device->id, cmd->device->lun,
-				   /*alloc*/TRUE);
-	BUG_ON(dev == NULL);
-
 	cmd->result = CAM_REQ_INPROG << 16;
 
 	return ahd_linux_run_command(ahd, dev, cmd);
 }
 
+static inline struct scsi_target **
+ahd_linux_target_in_softc(struct scsi_target *starget)
+{
+	struct	ahd_softc *ahd =
+		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
+	unsigned int target_offset;
+
+	target_offset = starget->id;
+	if (starget->channel != 0)
+		target_offset += 8;
+
+	return &ahd->platform_data->starget[target_offset];
+}
+
 static int
-ahd_linux_slave_alloc(Scsi_Device *device)
+ahd_linux_target_alloc(struct scsi_target *starget)
 {
-	struct	ahd_softc *ahd;
+	struct	ahd_softc *ahd =
+		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
+	unsigned long flags;
+	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
+	struct ahd_linux_target *targ = scsi_transport_target_data(starget);
+	struct ahd_devinfo devinfo;
+	struct ahd_initiator_tinfo *tinfo;
+	struct ahd_tmode_tstate *tstate;
+	char channel = starget->channel + 'A';
 
-	ahd = *((struct ahd_softc **)device->host->hostdata);
-	if (bootverbose)
-		printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id);
-	return (0);
+	ahd_lock(ahd, &flags);
+
+	BUG_ON(*ahd_targp != NULL);
+
+	*ahd_targp = starget;
+	memset(targ, 0, sizeof(*targ));
+
+	tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
+				    starget->id, &tstate);
+	ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
+			    CAM_LUN_WILDCARD, channel,
+			    ROLE_INITIATOR);
+	spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
+	if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
+		spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
+	else
+		spi_max_offset(starget) = MAX_OFFSET_PACED;
+	spi_max_width(starget) = ahd->features & AHD_WIDE;
+
+	ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
+			 AHD_TRANS_GOAL, /*paused*/FALSE);
+	ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+		      AHD_TRANS_GOAL, /*paused*/FALSE);
+	ahd_unlock(ahd, &flags);
+
+	return 0;
+}
+
+static void
+ahd_linux_target_destroy(struct scsi_target *starget)
+{
+	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
+
+	*ahd_targp = NULL;
 }
 
 static int
-ahd_linux_slave_configure(Scsi_Device *device)
+ahd_linux_slave_alloc(struct scsi_device *sdev)
 {
-	struct	ahd_softc *ahd;
-	struct	ahd_linux_device *dev;
-	u_long	flags;
+	struct	ahd_softc *ahd =
+		*((struct ahd_softc **)sdev->host->hostdata);
+	struct scsi_target *starget = sdev->sdev_target;
+	struct ahd_linux_target *targ = scsi_transport_target_data(starget);
+	struct ahd_linux_device *dev;
 
-	ahd = *((struct ahd_softc **)device->host->hostdata);
 	if (bootverbose)
-		printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id);
-	ahd_midlayer_entrypoint_lock(ahd, &flags);
+		printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
+
+	BUG_ON(targ->sdev[sdev->lun] != NULL);
+
+	dev = scsi_transport_device_data(sdev);
+	memset(dev, 0, sizeof(*dev));
+
+	/*
+	 * We start out life using untagged
+	 * transactions of which we allow one.
+	 */
+	dev->openings = 1;
+
 	/*
-	 * Since Linux has attached to the device, configure
-	 * it so we don't free and allocate the device
-	 * structure on every command.
+	 * Set maxtags to 0.  This will be changed if we
+	 * later determine that we are dealing with
+	 * a tagged queuing capable device.
 	 */
-	dev = ahd_linux_get_device(ahd, device->channel,
-				   device->id, device->lun,
-				   /*alloc*/TRUE);
-	if (dev != NULL) {
-		dev->flags &= ~AHD_DEV_UNCONFIGURED;
-		dev->flags |= AHD_DEV_SLAVE_CONFIGURED;
-		dev->scsi_device = device;
-		ahd_linux_device_queue_depth(ahd, dev);
-	}
-	ahd_midlayer_entrypoint_unlock(ahd, &flags);
+	dev->maxtags = 0;
+	
+	targ->sdev[sdev->lun] = sdev;
+
 	return (0);
 }
 
+static int
+ahd_linux_slave_configure(struct scsi_device *sdev)
+{
+	struct	ahd_softc *ahd;
+
+	ahd = *((struct ahd_softc **)sdev->host->hostdata);
+	if (bootverbose)
+		printf("%s: Slave Configure %d\n", ahd_name(ahd), sdev->id);
+
+	ahd_linux_device_queue_depth(sdev);
+
+	/* Initial Domain Validation */
+	if (!spi_initial_dv(sdev->sdev_target))
+		spi_dv_device(sdev);
+
+	return 0;
+}
+
 static void
-ahd_linux_slave_destroy(Scsi_Device *device)
+ahd_linux_slave_destroy(struct scsi_device *sdev)
 {
 	struct	ahd_softc *ahd;
-	struct	ahd_linux_device *dev;
-	u_long	flags;
+	struct	ahd_linux_device *dev = scsi_transport_device_data(sdev);
+	struct  ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
 
-	ahd = *((struct ahd_softc **)device->host->hostdata);
+	ahd = *((struct ahd_softc **)sdev->host->hostdata);
 	if (bootverbose)
-		printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id);
-	ahd_midlayer_entrypoint_lock(ahd, &flags);
-	dev = ahd_linux_get_device(ahd, device->channel,
-				   device->id, device->lun,
-					   /*alloc*/FALSE);
+		printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
+
+	BUG_ON(dev->active);
+
+	targ->sdev[sdev->lun] = NULL;
 
-	/*
-	 * Filter out "silly" deletions of real devices by only
-	 * deleting devices that have had slave_configure()
-	 * called on them.  All other devices that have not
-	 * been configured will automatically be deleted by
-	 * the refcounting process.
-	 */
-	if (dev != NULL
-	 && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
-		dev->flags |= AHD_DEV_UNCONFIGURED;
-		if (dev->active == 0
-		 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
-			ahd_linux_free_device(ahd, dev);
-	}
-	ahd_midlayer_entrypoint_unlock(ahd, &flags);
 }
 
 #if defined(__i386__)
@@ -887,3582 +705,1861 @@ ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
  * Abort the current SCSI command(s).
  */
 static int
-ahd_linux_abort(Scsi_Cmnd *cmd)
+ahd_linux_abort(struct scsi_cmnd *cmd)
+{
+	int error;
+
+	error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
+	if (error != 0)
+		printf("aic79xx_abort returns 0x%x\n", error);
+	return error;
+}
+
+/*
+ * Attempt to send a target reset message to the device that timed out.
+ */
+static int
+ahd_linux_dev_reset(struct scsi_cmnd *cmd)
+{
+	int error;
+
+	error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
+	if (error != 0)
+		printf("aic79xx_dev_reset returns 0x%x\n", error);
+	return error;
+}
+
+/*
+ * Reset the SCSI bus.
+ */
+static int
+ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 {
 	struct ahd_softc *ahd;
-	struct ahd_cmd *acmd;
-	struct ahd_linux_device *dev;
-	struct scb *pending_scb;
 	u_long s;
-	u_int  saved_scbptr;
-	u_int  active_scbptr;
-	u_int  last_phase;
-	u_int  cdb_byte;
-	int    retval;
-	int    was_paused;
-	int    paused;
-	int    wait;
-	int    disconnected;
-	ahd_mode_state saved_modes;
+	int    found;
 
-	pending_scb = NULL;
-	paused = FALSE;
-	wait = FALSE;
 	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
-	acmd = (struct ahd_cmd *)cmd;
+#ifdef AHD_DEBUG
+	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
+		printf("%s: Bus reset called for cmd %p\n",
+		       ahd_name(ahd), cmd);
+#endif
+	ahd_lock(ahd, &s);
+	found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
+				  /*initiate reset*/TRUE);
+	ahd_unlock(ahd, &s);
 
-	printf("%s:%d:%d:%d: Attempting to abort cmd %p:",
-	       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-	       cmd->device->lun, cmd);
-	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
-		printf(" 0x%x", cmd->cmnd[cdb_byte]);
-	printf("\n");
+	if (bootverbose)
+		printf("%s: SCSI bus reset delivered. "
+		       "%d SCBs aborted.\n", ahd_name(ahd), found);
 
-	/*
-	 * In all versions of Linux, we have to work around
-	 * a major flaw in how the mid-layer is locked down
-	 * if we are to sleep successfully in our error handler
-	 * while allowing our interrupt handler to run.  Since
-	 * the midlayer acquires either the io_request_lock or
-	 * our lock prior to calling us, we must use the
-	 * spin_unlock_irq() method for unlocking our lock.
-	 * This will force interrupts to be enabled on the
-	 * current CPU.  Since the EH thread should not have
-	 * been running with CPU interrupts disabled other than
-	 * by acquiring either the io_request_lock or our own
-	 * lock, this *should* be safe.
-	 */
-	ahd_midlayer_entrypoint_lock(ahd, &s);
+	return (SUCCESS);
+}
 
-	/*
-	 * First determine if we currently own this command.
-	 * Start by searching the device queue.  If not found
-	 * there, check the pending_scb list.  If not found
-	 * at all, and the system wanted us to just abort the
-	 * command, return success.
-	 */
-	dev = ahd_linux_get_device(ahd, cmd->device->channel,
-				   cmd->device->id, cmd->device->lun,
-				   /*alloc*/FALSE);
+struct scsi_host_template aic79xx_driver_template = {
+	.module			= THIS_MODULE,
+	.name			= "aic79xx",
+	.proc_info		= ahd_linux_proc_info,
+	.info			= ahd_linux_info,
+	.queuecommand		= ahd_linux_queue,
+	.eh_abort_handler	= ahd_linux_abort,
+	.eh_device_reset_handler = ahd_linux_dev_reset,
+	.eh_bus_reset_handler	= ahd_linux_bus_reset,
+#if defined(__i386__)
+	.bios_param		= ahd_linux_biosparam,
+#endif
+	.can_queue		= AHD_MAX_QUEUE,
+	.this_id		= -1,
+	.cmd_per_lun		= 2,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.slave_alloc		= ahd_linux_slave_alloc,
+	.slave_configure	= ahd_linux_slave_configure,
+	.slave_destroy		= ahd_linux_slave_destroy,
+	.target_alloc		= ahd_linux_target_alloc,
+	.target_destroy		= ahd_linux_target_destroy,
+};
 
-	if (dev == NULL) {
-		/*
-		 * No target device for this command exists,
-		 * so we must not still own the command.
-		 */
-		printf("%s:%d:%d:%d: Is not an active device\n",
-		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-		       cmd->device->lun);
-		retval = SUCCESS;
-		goto no_cmd;
-	}
+/******************************** Bus DMA *************************************/
+int
+ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
+		   bus_size_t alignment, bus_size_t boundary,
+		   dma_addr_t lowaddr, dma_addr_t highaddr,
+		   bus_dma_filter_t *filter, void *filterarg,
+		   bus_size_t maxsize, int nsegments,
+		   bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
+{
+	bus_dma_tag_t dmat;
+
+	dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
+	if (dmat == NULL)
+		return (ENOMEM);
 
 	/*
-	 * See if we can find a matching cmd in the pending list.
+	 * Linux is very simplistic about DMA memory.  For now don't
+	 * maintain all specification information.  Once Linux supplies
+	 * better facilities for doing these operations, or the
+	 * needs of this particular driver change, we might need to do
+	 * more here.
 	 */
-	LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
-		if (pending_scb->io_ctx == cmd)
-			break;
-	}
+	dmat->alignment = alignment;
+	dmat->boundary = boundary;
+	dmat->maxsize = maxsize;
+	*ret_tag = dmat;
+	return (0);
+}
 
-	if (pending_scb == NULL) {
-		printf("%s:%d:%d:%d: Command not found\n",
-		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-		       cmd->device->lun);
-		goto no_cmd;
-	}
+void
+ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
+{
+	free(dmat, M_DEVBUF);
+}
 
-	if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
-		/*
-		 * We can't queue two recovery actions using the same SCB
-		 */
-		retval = FAILED;
-		goto  done;
-	}
+int
+ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
+		 int flags, bus_dmamap_t *mapp)
+{
+	*vaddr = pci_alloc_consistent(ahd->dev_softc,
+				      dmat->maxsize, mapp);
+	if (*vaddr == NULL)
+		return (ENOMEM);
+	return(0);
+}
 
+void
+ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
+		void* vaddr, bus_dmamap_t map)
+{
+	pci_free_consistent(ahd->dev_softc, dmat->maxsize,
+			    vaddr, map);
+}
+
+int
+ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
+		void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
+		void *cb_arg, int flags)
+{
 	/*
-	 * Ensure that the card doesn't do anything
-	 * behind our back.  Also make sure that we
-	 * didn't "just" miss an interrupt that would
-	 * affect this cmd.
+	 * Assume for now that this will only be used during
+	 * initialization and not for per-transaction buffer mapping.
 	 */
-	was_paused = ahd_is_paused(ahd);
-	ahd_pause_and_flushwork(ahd);
-	paused = TRUE;
-
-	if ((pending_scb->flags & SCB_ACTIVE) == 0) {
-		printf("%s:%d:%d:%d: Command already completed\n",
-		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-		       cmd->device->lun);
-		goto no_cmd;
-	}
+	bus_dma_segment_t stack_sg;
 
-	printf("%s: At time of recovery, card was %spaused\n",
-	       ahd_name(ahd), was_paused ? "" : "not ");
-	ahd_dump_card_state(ahd);
+	stack_sg.ds_addr = map;
+	stack_sg.ds_len = dmat->maxsize;
+	cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
+	return (0);
+}
 
-	disconnected = TRUE;
-	if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A',
-			       cmd->device->lun, SCB_GET_TAG(pending_scb),
-			       ROLE_INITIATOR, CAM_REQ_ABORTED,
-			       SEARCH_COMPLETE) > 0) {
-		printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
-		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-				cmd->device->lun);
-		retval = SUCCESS;
-		goto done;
-	}
+void
+ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+}
 
-	saved_modes = ahd_save_modes(ahd);
-	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
-	last_phase = ahd_inb(ahd, LASTPHASE);
-	saved_scbptr = ahd_get_scbptr(ahd);
-	active_scbptr = saved_scbptr;
-	if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
-		struct scb *bus_scb;
+int
+ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+	/* Nothing to do */
+	return (0);
+}
 
-		bus_scb = ahd_lookup_scb(ahd, active_scbptr);
-		if (bus_scb == pending_scb)
-			disconnected = FALSE;
-	}
+/********************* Platform Dependent Functions ***************************/
+/*
+ * Compare "left hand" softc with "right hand" softc, returning:
+ * < 0 - lahd has a lower priority than rahd
+ *   0 - Softcs are equal
+ * > 0 - lahd has a higher priority than rahd
+ */
+int
+ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
+{
+	int	value;
 
 	/*
-	 * At this point, pending_scb is the scb associated with the
-	 * passed in command.  That command is currently active on the
-	 * bus or is in the disconnected state.
+	 * Under Linux, cards are ordered as follows:
+	 *	1) PCI devices that are marked as the boot controller.
+	 *	2) PCI devices with BIOS enabled sorted by bus/slot/func.
+	 *	3) All remaining PCI devices sorted by bus/slot/func.
 	 */
-	if (last_phase != P_BUSFREE
-	 && SCB_GET_TAG(pending_scb) == active_scbptr) {
+#if 0
+	value = (lahd->flags & AHD_BOOT_CHANNEL)
+	      - (rahd->flags & AHD_BOOT_CHANNEL);
+	if (value != 0)
+		/* Controllers set for boot have a *higher* priority */
+		return (value);
+#endif
 
-		/*
-		 * We're active on the bus, so assert ATN
-		 * and hope that the target responds.
-		 */
-		pending_scb = ahd_lookup_scb(ahd, active_scbptr);
-		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
-		ahd_outb(ahd, MSG_OUT, HOST_MSG);
-		ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
-		printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
-		       ahd_name(ahd), cmd->device->channel,
-		       cmd->device->id, cmd->device->lun);
-		wait = TRUE;
-	} else if (disconnected) {
+	value = (lahd->flags & AHD_BIOS_ENABLED)
+	      - (rahd->flags & AHD_BIOS_ENABLED);
+	if (value != 0)
+		/* Controllers with BIOS enabled have a *higher* priority */
+		return (value);
 
-		/*
-		 * Actually re-queue this SCB in an attempt
-		 * to select the device before it reconnects.
-		 */
-		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
-		ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
-		pending_scb->hscb->cdb_len = 0;
-		pending_scb->hscb->task_attribute = 0;
-		pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
+	/* Still equal.  Sort by bus/slot/func. */
+	if (aic79xx_reverse_scan != 0)
+		value = ahd_get_pci_bus(lahd->dev_softc)
+		      - ahd_get_pci_bus(rahd->dev_softc);
+	else
+		value = ahd_get_pci_bus(rahd->dev_softc)
+		      - ahd_get_pci_bus(lahd->dev_softc);
+	if (value != 0)
+		return (value);
+	if (aic79xx_reverse_scan != 0)
+		value = ahd_get_pci_slot(lahd->dev_softc)
+		      - ahd_get_pci_slot(rahd->dev_softc);
+	else
+		value = ahd_get_pci_slot(rahd->dev_softc)
+		      - ahd_get_pci_slot(lahd->dev_softc);
+	if (value != 0)
+		return (value);
 
-		if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
-			/*
-			 * Mark the SCB has having an outstanding
-			 * task management function.  Should the command
-			 * complete normally before the task management
-			 * function can be sent, the host will be notified
-			 * to abort our requeued SCB.
-			 */
-			ahd_outb(ahd, SCB_TASK_MANAGEMENT,
-				 pending_scb->hscb->task_management);
-		} else {
-			/*
-			 * If non-packetized, set the MK_MESSAGE control
-			 * bit indicating that we desire to send a message.
-			 * We also set the disconnected flag since there is
-			 * no guarantee that our SCB control byte matches
-			 * the version on the card.  We don't want the
-			 * sequencer to abort the command thinking an
-			 * unsolicited reselection occurred.
-			 */
-			pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
+	value = rahd->channel - lahd->channel;
+	return (value);
+}
 
-			/*
-			 * The sequencer will never re-reference the
-			 * in-core SCB.  To make sure we are notified
-			 * during reslection, set the MK_MESSAGE flag in
-			 * the card's copy of the SCB.
-			 */
-			ahd_outb(ahd, SCB_CONTROL,
-				 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
-		}
+static void
+ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
+{
 
-		/*
-		 * Clear out any entries in the QINFIFO first
-		 * so we are the next SCB for this target
-		 * to run.
-		 */
-		ahd_search_qinfifo(ahd, cmd->device->id,
-				   cmd->device->channel + 'A', cmd->device->lun,
-				   SCB_LIST_NULL, ROLE_INITIATOR,
-				   CAM_REQUEUE_REQ, SEARCH_COMPLETE);
-		ahd_qinfifo_requeue_tail(ahd, pending_scb);
-		ahd_set_scbptr(ahd, saved_scbptr);
-		ahd_print_path(ahd, pending_scb);
-		printf("Device is disconnected, re-queuing SCB\n");
-		wait = TRUE;
-	} else {
-		printf("%s:%d:%d:%d: Unable to deliver message\n",
-		       ahd_name(ahd), cmd->device->channel,
-		       cmd->device->id, cmd->device->lun);
-		retval = FAILED;
-		goto done;
+	if ((instance >= 0)
+	 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
+		uint8_t *iocell_info;
+
+		iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
+		iocell_info[index] = value & 0xFFFF;
+		if (bootverbose)
+			printf("iocell[%d:%ld] = %d\n", instance, index, value);
 	}
+}
 
-no_cmd:
-	/*
-	 * Our assumption is that if we don't have the command, no
-	 * recovery action was required, so we return success.  Again,
-	 * the semantics of the mid-layer recovery engine are not
-	 * well defined, so this may change in time.
-	 */
-	retval = SUCCESS;
-done:
-	if (paused)
-		ahd_unpause(ahd);
-	if (wait) {
-		struct timer_list timer;
-		int ret;
+static void
+ahd_linux_setup_tag_info_global(char *p)
+{
+	int tags, i, j;
 
-		pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
-		spin_unlock_irq(&ahd->platform_data->spin_lock);
-		init_timer(&timer);
-		timer.data = (u_long)pending_scb;
-		timer.expires = jiffies + (5 * HZ);
-		timer.function = ahd_linux_sem_timeout;
-		add_timer(&timer);
-		printf("Recovery code sleeping\n");
-		down(&ahd->platform_data->eh_sem);
-		printf("Recovery code awake\n");
-        	ret = del_timer_sync(&timer);
-		if (ret == 0) {
-			printf("Timer Expired\n");
-			retval = FAILED;
+	tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
+	printf("Setting Global Tags= %d\n", tags);
+
+	for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
+		for (j = 0; j < AHD_NUM_TARGETS; j++) {
+			aic79xx_tag_info[i].tag_commands[j] = tags;
 		}
-		spin_lock_irq(&ahd->platform_data->spin_lock);
 	}
-	ahd_linux_run_complete_queue(ahd);
-	ahd_midlayer_entrypoint_unlock(ahd, &s);
-	return (retval);
 }
 
-
 static void
-ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd)
+ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
 {
-	free(cmd, M_DEVBUF);
-}
 
-/*
- * Attempt to send a target reset message to the device that timed out.
- */
-static int
-ahd_linux_dev_reset(Scsi_Cmnd *cmd)
-{
-	struct	ahd_softc *ahd;
-	struct	scsi_cmnd *recovery_cmd;
-	struct	ahd_linux_device *dev;
-	struct	ahd_initiator_tinfo *tinfo;
-	struct	ahd_tmode_tstate *tstate;
-	struct	scb *scb;
-	struct	hardware_scb *hscb;
-	u_long	s;
-	struct	timer_list timer;
-	int	retval;
-
-	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
-	recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
-	if (!recovery_cmd)
-		return (FAILED);
-	memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
-	recovery_cmd->device = cmd->device;
-	recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
-#ifdef AHD_DEBUG
-	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
-		printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
-		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-		       cmd->device->lun, cmd);
-#endif
-	ahd_lock(ahd, &s);
-
-	dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id,
-				   cmd->device->lun, /*alloc*/FALSE);
-	if (dev == NULL) {
-		ahd_unlock(ahd, &s);
-		kfree(recovery_cmd);
-		return (FAILED);
-	}
-	if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) {
-		ahd_unlock(ahd, &s);
-		kfree(recovery_cmd);
-		return (FAILED);
-	}
-	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
-				    cmd->device->id, &tstate);
-	recovery_cmd->result = CAM_REQ_INPROG << 16;
-	recovery_cmd->host_scribble = (char *)scb;
-	scb->io_ctx = recovery_cmd;
-	scb->platform_data->dev = dev;
-	scb->sg_count = 0;
-	ahd_set_residual(scb, 0);
-	ahd_set_sense_residual(scb, 0);
-	hscb = scb->hscb;
-	hscb->control = 0;
-	hscb->scsiid = BUILD_SCSIID(ahd, cmd);
-	hscb->lun = cmd->device->lun;
-	hscb->cdb_len = 0;
-	hscb->task_management = SIU_TASKMGMT_LUN_RESET;
-	scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
-	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
-		scb->flags |= SCB_PACKETIZED;
-	} else {
-		hscb->control |= MK_MESSAGE;
-	}
-	dev->openings--;
-	dev->active++;
-	dev->commands_issued++;
-	LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
-	ahd_queue_scb(ahd, scb);
-
-	scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
-	ahd_unlock(ahd, &s);
-	init_timer(&timer);
-	timer.data = (u_long)scb;
-	timer.expires = jiffies + (5 * HZ);
-	timer.function = ahd_linux_sem_timeout;
-	add_timer(&timer);
-	printf("Recovery code sleeping\n");
-	down(&ahd->platform_data->eh_sem);
-	printf("Recovery code awake\n");
-	retval = SUCCESS;
-	if (del_timer_sync(&timer) == 0) {
-		printf("Timer Expired\n");
-		retval = FAILED;
+	if ((instance >= 0) && (targ >= 0)
+	 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
+	 && (targ < AHD_NUM_TARGETS)) {
+		aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
+		if (bootverbose)
+			printf("tag_info[%d:%d] = %d\n", instance, targ, value);
 	}
-	ahd_lock(ahd, &s);
-	ahd_linux_run_complete_queue(ahd);
-	ahd_unlock(ahd, &s);
-	printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
-	return (retval);
 }
 
 /*
- * Reset the SCSI bus.
+ * Handle Linux boot parameters. This routine allows for assigning a value
+ * to a parameter with a ':' between the parameter and the value.
+ * ie. aic79xx=stpwlev:1,extended
  */
 static int
-ahd_linux_bus_reset(Scsi_Cmnd *cmd)
+aic79xx_setup(char *s)
 {
-	struct ahd_softc *ahd;
-	u_long s;
-	int    found;
+	int	i, n;
+	char   *p;
+	char   *end;
 
-	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+	static struct {
+		const char *name;
+		uint32_t *flag;
+	} options[] = {
+		{ "extended", &aic79xx_extended },
+		{ "no_reset", &aic79xx_no_reset },
+		{ "verbose", &aic79xx_verbose },
+		{ "allow_memio", &aic79xx_allow_memio},
 #ifdef AHD_DEBUG
-	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
-		printf("%s: Bus reset called for cmd %p\n",
-		       ahd_name(ahd), cmd);
+		{ "debug", &ahd_debug },
 #endif
-	ahd_lock(ahd, &s);
-	found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
-				  /*initiate reset*/TRUE);
-	ahd_linux_run_complete_queue(ahd);
-	ahd_unlock(ahd, &s);
+		{ "reverse_scan", &aic79xx_reverse_scan },
+		{ "periodic_otag", &aic79xx_periodic_otag },
+		{ "pci_parity", &aic79xx_pci_parity },
+		{ "seltime", &aic79xx_seltime },
+		{ "tag_info", NULL },
+		{ "global_tag_depth", NULL},
+		{ "slewrate", NULL },
+		{ "precomp", NULL },
+		{ "amplitude", NULL },
+	};
 
-	if (bootverbose)
-		printf("%s: SCSI bus reset delivered. "
-		       "%d SCBs aborted.\n", ahd_name(ahd), found);
+	end = strchr(s, '\0');
 
-	return (SUCCESS);
+	/*
+	 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
+	 * will never be 0 in this case.
+	 */      
+	n = 0;  
+
+	while ((p = strsep(&s, ",.")) != NULL) {
+		if (*p == '\0')
+			continue;
+		for (i = 0; i < NUM_ELEMENTS(options); i++) {
+
+			n = strlen(options[i].name);
+			if (strncmp(options[i].name, p, n) == 0)
+				break;
+		}
+		if (i == NUM_ELEMENTS(options))
+			continue;
+
+		if (strncmp(p, "global_tag_depth", n) == 0) {
+			ahd_linux_setup_tag_info_global(p + n);
+		} else if (strncmp(p, "tag_info", n) == 0) {
+			s = aic_parse_brace_option("tag_info", p + n, end,
+			    2, ahd_linux_setup_tag_info, 0);
+		} else if (strncmp(p, "slewrate", n) == 0) {
+			s = aic_parse_brace_option("slewrate",
+			    p + n, end, 1, ahd_linux_setup_iocell_info,
+			    AIC79XX_SLEWRATE_INDEX);
+		} else if (strncmp(p, "precomp", n) == 0) {
+			s = aic_parse_brace_option("precomp",
+			    p + n, end, 1, ahd_linux_setup_iocell_info,
+			    AIC79XX_PRECOMP_INDEX);
+		} else if (strncmp(p, "amplitude", n) == 0) {
+			s = aic_parse_brace_option("amplitude",
+			    p + n, end, 1, ahd_linux_setup_iocell_info,
+			    AIC79XX_AMPLITUDE_INDEX);
+		} else if (p[n] == ':') {
+			*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
+		} else if (!strncmp(p, "verbose", n)) {
+			*(options[i].flag) = 1;
+		} else {
+			*(options[i].flag) ^= 0xFFFFFFFF;
+		}
+	}
+	return 1;
 }
 
-Scsi_Host_Template aic79xx_driver_template = {
-	.module			= THIS_MODULE,
-	.name			= "aic79xx",
-	.proc_info		= ahd_linux_proc_info,
-	.info			= ahd_linux_info,
-	.queuecommand		= ahd_linux_queue,
-	.eh_abort_handler	= ahd_linux_abort,
-	.eh_device_reset_handler = ahd_linux_dev_reset,
-	.eh_bus_reset_handler	= ahd_linux_bus_reset,
-#if defined(__i386__)
-	.bios_param		= ahd_linux_biosparam,
-#endif
-	.can_queue		= AHD_MAX_QUEUE,
-	.this_id		= -1,
-	.cmd_per_lun		= 2,
-	.use_clustering		= ENABLE_CLUSTERING,
-	.slave_alloc		= ahd_linux_slave_alloc,
-	.slave_configure	= ahd_linux_slave_configure,
-	.slave_destroy		= ahd_linux_slave_destroy,
-};
+__setup("aic79xx=", aic79xx_setup);
+
+uint32_t aic79xx_verbose;
 
-/******************************** Bus DMA *************************************/
 int
-ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
-		   bus_size_t alignment, bus_size_t boundary,
-		   dma_addr_t lowaddr, dma_addr_t highaddr,
-		   bus_dma_filter_t *filter, void *filterarg,
-		   bus_size_t maxsize, int nsegments,
-		   bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
+ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
 {
-	bus_dma_tag_t dmat;
+	char	buf[80];
+	struct	Scsi_Host *host;
+	char	*new_name;
+	u_long	s;
 
-	dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
-	if (dmat == NULL)
+	template->name = ahd->description;
+	host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
+	if (host == NULL)
 		return (ENOMEM);
 
-	/*
-	 * Linux is very simplistic about DMA memory.  For now don't
-	 * maintain all specification information.  Once Linux supplies
-	 * better facilities for doing these operations, or the
-	 * needs of this particular driver change, we might need to do
-	 * more here.
-	 */
-	dmat->alignment = alignment;
-	dmat->boundary = boundary;
-	dmat->maxsize = maxsize;
-	*ret_tag = dmat;
+	*((struct ahd_softc **)host->hostdata) = ahd;
+	ahd_lock(ahd, &s);
+	scsi_assign_lock(host, &ahd->platform_data->spin_lock);
+	ahd->platform_data->host = host;
+	host->can_queue = AHD_MAX_QUEUE;
+	host->cmd_per_lun = 2;
+	host->sg_tablesize = AHD_NSEG;
+	host->this_id = ahd->our_id;
+	host->irq = ahd->platform_data->irq;
+	host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
+	host->max_lun = AHD_NUM_LUNS;
+	host->max_channel = 0;
+	host->sg_tablesize = AHD_NSEG;
+	ahd_set_unit(ahd, ahd_linux_next_unit());
+	sprintf(buf, "scsi%d", host->host_no);
+	new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
+	if (new_name != NULL) {
+		strcpy(new_name, buf);
+		ahd_set_name(ahd, new_name);
+	}
+	host->unique_id = ahd->unit;
+	ahd_linux_initialize_scsi_bus(ahd);
+	ahd_intr_enable(ahd, TRUE);
+	ahd_unlock(ahd, &s);
+
+	host->transportt = ahd_linux_transport_template;
+
+	scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
+	scsi_scan_host(host);
 	return (0);
 }
 
-void
-ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
+uint64_t
+ahd_linux_get_memsize(void)
 {
-	free(dmat, M_DEVBUF);
+	struct sysinfo si;
+
+	si_meminfo(&si);
+	return ((uint64_t)si.totalram << PAGE_SHIFT);
 }
 
-int
-ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
-		 int flags, bus_dmamap_t *mapp)
+/*
+ * Find the smallest available unit number to use
+ * for a new device.  We don't just use a static
+ * count to handle the "repeated hot-(un)plug"
+ * scenario.
+ */
+static int
+ahd_linux_next_unit(void)
 {
-	bus_dmamap_t map;
+	struct ahd_softc *ahd;
+	int unit;
 
-	map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
-	if (map == NULL)
-		return (ENOMEM);
-	/*
-	 * Although we can dma data above 4GB, our
-	 * "consistent" memory is below 4GB for
-	 * space efficiency reasons (only need a 4byte
-	 * address).  For this reason, we have to reset
-	 * our dma mask when doing allocations.
-	 */
-	if (ahd->dev_softc != NULL)
-		if (pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) {
-			printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
-			kfree(map);
-			return (ENODEV);
-		}
-	*vaddr = pci_alloc_consistent(ahd->dev_softc,
-				      dmat->maxsize, &map->bus_addr);
-	if (ahd->dev_softc != NULL)
-		if (pci_set_dma_mask(ahd->dev_softc,
-				     ahd->platform_data->hw_dma_mask)) {
-			printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
-			kfree(map);
-			return (ENODEV);
+	unit = 0;
+retry:
+	TAILQ_FOREACH(ahd, &ahd_tailq, links) {
+		if (ahd->unit == unit) {
+			unit++;
+			goto retry;
 		}
-	if (*vaddr == NULL)
-		return (ENOMEM);
-	*mapp = map;
-	return(0);
+	}
+	return (unit);
 }
 
-void
-ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
-		void* vaddr, bus_dmamap_t map)
-{
-	pci_free_consistent(ahd->dev_softc, dmat->maxsize,
-			    vaddr, map->bus_addr);
-}
-
-int
-ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
-		void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
-		void *cb_arg, int flags)
+/*
+ * Place the SCSI bus into a known state by either resetting it,
+ * or forcing transfer negotiations on the next command to any
+ * target.
+ */
+static void
+ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
 {
-	/*
-	 * Assume for now that this will only be used during
-	 * initialization and not for per-transaction buffer mapping.
-	 */
-	bus_dma_segment_t stack_sg;
+	u_int target_id;
+	u_int numtarg;
 
-	stack_sg.ds_addr = map->bus_addr;
-	stack_sg.ds_len = dmat->maxsize;
-	cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
-	return (0);
-}
+	target_id = 0;
+	numtarg = 0;
+
+	if (aic79xx_no_reset != 0)
+		ahd->flags &= ~AHD_RESET_BUS_A;
+
+	if ((ahd->flags & AHD_RESET_BUS_A) != 0)
+		ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
+	else
+		numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
 
-void
-ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
-{
 	/*
-	 * The map may is NULL in our < 2.3.X implementation.
+	 * Force negotiation to async for all targets that
+	 * will not see an initial bus reset.
 	 */
-	if (map != NULL)
-		free(map, M_DEVBUF);
+	for (; target_id < numtarg; target_id++) {
+		struct ahd_devinfo devinfo;
+		struct ahd_initiator_tinfo *tinfo;
+		struct ahd_tmode_tstate *tstate;
+
+		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+					    target_id, &tstate);
+		ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
+				    CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
+		ahd_update_neg_request(ahd, &devinfo, tstate,
+				       tinfo, AHD_NEG_ALWAYS);
+	}
+	/* Give the bus some time to recover */
+	if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
+		ahd_freeze_simq(ahd);
+		init_timer(&ahd->platform_data->reset_timer);
+		ahd->platform_data->reset_timer.data = (u_long)ahd;
+		ahd->platform_data->reset_timer.expires =
+		    jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
+		ahd->platform_data->reset_timer.function =
+		    (ahd_linux_callback_t *)ahd_release_simq;
+		add_timer(&ahd->platform_data->reset_timer);
+	}
 }
 
 int
-ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
+ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
 {
-	/* Nothing to do */
+	ahd->platform_data =
+	    malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
+	if (ahd->platform_data == NULL)
+		return (ENOMEM);
+	memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
+	ahd->platform_data->irq = AHD_LINUX_NOIRQ;
+	ahd_lockinit(ahd);
+	init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
+	ahd->seltime = (aic79xx_seltime & 0x3) << 4;
 	return (0);
 }
 
-/********************* Platform Dependent Functions ***************************/
-/*
- * Compare "left hand" softc with "right hand" softc, returning:
- * < 0 - lahd has a lower priority than rahd
- *   0 - Softcs are equal
- * > 0 - lahd has a higher priority than rahd
- */
-int
-ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
+void
+ahd_platform_free(struct ahd_softc *ahd)
 {
-	int	value;
-
-	/*
-	 * Under Linux, cards are ordered as follows:
-	 *	1) PCI devices that are marked as the boot controller.
-	 *	2) PCI devices with BIOS enabled sorted by bus/slot/func.
-	 *	3) All remaining PCI devices sorted by bus/slot/func.
-	 */
-#if 0
-	value = (lahd->flags & AHD_BOOT_CHANNEL)
-	      - (rahd->flags & AHD_BOOT_CHANNEL);
-	if (value != 0)
-		/* Controllers set for boot have a *higher* priority */
-		return (value);
-#endif
+	struct scsi_target *starget;
+	int i, j;
 
-	value = (lahd->flags & AHD_BIOS_ENABLED)
-	      - (rahd->flags & AHD_BIOS_ENABLED);
-	if (value != 0)
-		/* Controllers with BIOS enabled have a *higher* priority */
-		return (value);
+	if (ahd->platform_data != NULL) {
+		if (ahd->platform_data->host != NULL) {
+			scsi_remove_host(ahd->platform_data->host);
+			scsi_host_put(ahd->platform_data->host);
+		}
 
-	/* Still equal.  Sort by bus/slot/func. */
-	if (aic79xx_reverse_scan != 0)
-		value = ahd_get_pci_bus(lahd->dev_softc)
-		      - ahd_get_pci_bus(rahd->dev_softc);
-	else
-		value = ahd_get_pci_bus(rahd->dev_softc)
-		      - ahd_get_pci_bus(lahd->dev_softc);
-	if (value != 0)
-		return (value);
-	if (aic79xx_reverse_scan != 0)
-		value = ahd_get_pci_slot(lahd->dev_softc)
-		      - ahd_get_pci_slot(rahd->dev_softc);
-	else
-		value = ahd_get_pci_slot(rahd->dev_softc)
-		      - ahd_get_pci_slot(lahd->dev_softc);
-	if (value != 0)
-		return (value);
+		/* destroy all of the device and target objects */
+		for (i = 0; i < AHD_NUM_TARGETS; i++) {
+			starget = ahd->platform_data->starget[i];
+			if (starget != NULL) {
+				for (j = 0; j < AHD_NUM_LUNS; j++) {
+					struct ahd_linux_target *targ =
+						scsi_transport_target_data(starget);
+					if (targ->sdev[j] == NULL)
+						continue;
+					targ->sdev[j] = NULL;
+				}
+				ahd->platform_data->starget[i] = NULL;
+			}
+		}
 
-	value = rahd->channel - lahd->channel;
-	return (value);
+		if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
+			free_irq(ahd->platform_data->irq, ahd);
+		if (ahd->tags[0] == BUS_SPACE_PIO
+		 && ahd->bshs[0].ioport != 0)
+			release_region(ahd->bshs[0].ioport, 256);
+		if (ahd->tags[1] == BUS_SPACE_PIO
+		 && ahd->bshs[1].ioport != 0)
+			release_region(ahd->bshs[1].ioport, 256);
+		if (ahd->tags[0] == BUS_SPACE_MEMIO
+		 && ahd->bshs[0].maddr != NULL) {
+			iounmap(ahd->bshs[0].maddr);
+			release_mem_region(ahd->platform_data->mem_busaddr,
+					   0x1000);
+		}
+		free(ahd->platform_data, M_DEVBUF);
+	}
 }
 
-static void
-ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
+void
+ahd_platform_init(struct ahd_softc *ahd)
 {
+	/*
+	 * Lookup and commit any modified IO Cell options.
+	 */
+	if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
+		struct ahd_linux_iocell_opts *iocell_opts;
 
-	if ((instance >= 0) && (targ >= 0)
-	 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
-	 && (targ < AHD_NUM_TARGETS)) {
-		aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
-		if (bootverbose)
-			printf("tag_info[%d:%d] = %d\n", instance, targ, value);
+		iocell_opts = &aic79xx_iocell_info[ahd->unit];
+		if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
+			AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
+		if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
+			AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
+		if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
+			AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
 	}
-}
 
-static void
-ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value)
-{
-	if ((instance >= 0)
-	 && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) {
-		aic79xx_rd_strm_info[instance] = value & 0xFFFF;
-		if (bootverbose)
-			printf("rd_strm[%d] = 0x%x\n", instance, value);
-	}
 }
 
-static void
-ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value)
+void
+ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
 {
-	if ((instance >= 0)
-	 && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) {
-		aic79xx_dv_settings[instance] = value;
-		if (bootverbose)
-			printf("dv[%d] = %d\n", instance, value);
-	}
+	ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
+				SCB_GET_CHANNEL(ahd, scb),
+				SCB_GET_LUN(scb), SCB_LIST_NULL,
+				ROLE_UNKNOWN, CAM_REQUEUE_REQ);
 }
 
-static void
-ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
+void
+ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
+		      ahd_queue_alg alg)
 {
+	struct scsi_target *starget;
+	struct ahd_linux_target *targ;
+	struct ahd_linux_device *dev;
+	struct scsi_device *sdev;
+	int was_queuing;
+	int now_queuing;
 
-	if ((instance >= 0)
-	 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
-		uint8_t *iocell_info;
-
-		iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
-		iocell_info[index] = value & 0xFFFF;
-		if (bootverbose)
-			printf("iocell[%d:%ld] = %d\n", instance, index, value);
-	}
-}
-
-static void
-ahd_linux_setup_tag_info_global(char *p)
-{
-	int tags, i, j;
+	starget = ahd->platform_data->starget[devinfo->target];
+	targ = scsi_transport_target_data(starget);
+	BUG_ON(targ == NULL);
+	sdev = targ->sdev[devinfo->lun];
+	if (sdev == NULL)
+		return;
 
-	tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
-	printf("Setting Global Tags= %d\n", tags);
+	dev = scsi_transport_device_data(sdev);
 
-	for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
-		for (j = 0; j < AHD_NUM_TARGETS; j++) {
-			aic79xx_tag_info[i].tag_commands[j] = tags;
-		}
+	if (dev == NULL)
+		return;
+	was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
+	switch (alg) {
+	default:
+	case AHD_QUEUE_NONE:
+		now_queuing = 0;
+		break; 
+	case AHD_QUEUE_BASIC:
+		now_queuing = AHD_DEV_Q_BASIC;
+		break;
+	case AHD_QUEUE_TAGGED:
+		now_queuing = AHD_DEV_Q_TAGGED;
+		break;
+	}
+	if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
+	 && (was_queuing != now_queuing)
+	 && (dev->active != 0)) {
+		dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
+		dev->qfrozen++;
 	}
-}
 
-/*
- * Handle Linux boot parameters. This routine allows for assigning a value
- * to a parameter with a ':' between the parameter and the value.
- * ie. aic79xx=stpwlev:1,extended
- */
-static int
-aic79xx_setup(char *s)
-{
-	int	i, n;
-	char   *p;
-	char   *end;
+	dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
+	if (now_queuing) {
+		u_int usertags;
 
-	static struct {
-		const char *name;
-		uint32_t *flag;
-	} options[] = {
-		{ "extended", &aic79xx_extended },
-		{ "no_reset", &aic79xx_no_reset },
-		{ "verbose", &aic79xx_verbose },
-		{ "allow_memio", &aic79xx_allow_memio},
-#ifdef AHD_DEBUG
-		{ "debug", &ahd_debug },
-#endif
-		{ "reverse_scan", &aic79xx_reverse_scan },
-		{ "periodic_otag", &aic79xx_periodic_otag },
-		{ "pci_parity", &aic79xx_pci_parity },
-		{ "seltime", &aic79xx_seltime },
-		{ "tag_info", NULL },
-		{ "global_tag_depth", NULL},
-		{ "rd_strm", NULL },
-		{ "dv", NULL },
-		{ "slewrate", NULL },
-		{ "precomp", NULL },
-		{ "amplitude", NULL },
-	};
-
-	end = strchr(s, '\0');
-
-	/*
-	 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
-	 * will never be 0 in this case.
-	 */      
-	n = 0;  
-
-	while ((p = strsep(&s, ",.")) != NULL) {
-		if (*p == '\0')
-			continue;
-		for (i = 0; i < NUM_ELEMENTS(options); i++) {
-
-			n = strlen(options[i].name);
-			if (strncmp(options[i].name, p, n) == 0)
-				break;
-		}
-		if (i == NUM_ELEMENTS(options))
-			continue;
-
-		if (strncmp(p, "global_tag_depth", n) == 0) {
-			ahd_linux_setup_tag_info_global(p + n);
-		} else if (strncmp(p, "tag_info", n) == 0) {
-			s = aic_parse_brace_option("tag_info", p + n, end,
-			    2, ahd_linux_setup_tag_info, 0);
-		} else if (strncmp(p, "rd_strm", n) == 0) {
-			s = aic_parse_brace_option("rd_strm", p + n, end,
-			    1, ahd_linux_setup_rd_strm_info, 0);
-		} else if (strncmp(p, "dv", n) == 0) {
-			s = aic_parse_brace_option("dv", p + n, end, 1,
-			    ahd_linux_setup_dv, 0);
-		} else if (strncmp(p, "slewrate", n) == 0) {
-			s = aic_parse_brace_option("slewrate",
-			    p + n, end, 1, ahd_linux_setup_iocell_info,
-			    AIC79XX_SLEWRATE_INDEX);
-		} else if (strncmp(p, "precomp", n) == 0) {
-			s = aic_parse_brace_option("precomp",
-			    p + n, end, 1, ahd_linux_setup_iocell_info,
-			    AIC79XX_PRECOMP_INDEX);
-		} else if (strncmp(p, "amplitude", n) == 0) {
-			s = aic_parse_brace_option("amplitude",
-			    p + n, end, 1, ahd_linux_setup_iocell_info,
-			    AIC79XX_AMPLITUDE_INDEX);
-		} else if (p[n] == ':') {
-			*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
-		} else if (!strncmp(p, "verbose", n)) {
-			*(options[i].flag) = 1;
-		} else {
-			*(options[i].flag) ^= 0xFFFFFFFF;
+		usertags = ahd_linux_user_tagdepth(ahd, devinfo);
+		if (!was_queuing) {
+			/*
+			 * Start out agressively and allow our
+			 * dynamic queue depth algorithm to take
+			 * care of the rest.
+			 */
+			dev->maxtags = usertags;
+			dev->openings = dev->maxtags - dev->active;
 		}
+		if (dev->maxtags == 0) {
+			/*
+			 * Queueing is disabled by the user.
+			 */
+			dev->openings = 1;
+		} else if (alg == AHD_QUEUE_TAGGED) {
+			dev->flags |= AHD_DEV_Q_TAGGED;
+			if (aic79xx_periodic_otag != 0)
+				dev->flags |= AHD_DEV_PERIODIC_OTAG;
+		} else
+			dev->flags |= AHD_DEV_Q_BASIC;
+	} else {
+		/* We can only have one opening. */
+		dev->maxtags = 0;
+		dev->openings =  1 - dev->active;
 	}
-	return 1;
-}
-
-__setup("aic79xx=", aic79xx_setup);
-
-uint32_t aic79xx_verbose;
-
-int
-ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
-{
-	char	buf[80];
-	struct	Scsi_Host *host;
-	char	*new_name;
-	u_long	s;
-	u_long	target;
-
-	template->name = ahd->description;
-	host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
-	if (host == NULL)
-		return (ENOMEM);
-
-	*((struct ahd_softc **)host->hostdata) = ahd;
-	ahd_lock(ahd, &s);
-	scsi_assign_lock(host, &ahd->platform_data->spin_lock);
-	ahd->platform_data->host = host;
-	host->can_queue = AHD_MAX_QUEUE;
-	host->cmd_per_lun = 2;
-	host->sg_tablesize = AHD_NSEG;
-	host->this_id = ahd->our_id;
-	host->irq = ahd->platform_data->irq;
-	host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
-	host->max_lun = AHD_NUM_LUNS;
-	host->max_channel = 0;
-	host->sg_tablesize = AHD_NSEG;
-	ahd_set_unit(ahd, ahd_linux_next_unit());
-	sprintf(buf, "scsi%d", host->host_no);
-	new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
-	if (new_name != NULL) {
-		strcpy(new_name, buf);
-		ahd_set_name(ahd, new_name);
-	}
-	host->unique_id = ahd->unit;
-	ahd_linux_setup_user_rd_strm_settings(ahd);
-	ahd_linux_initialize_scsi_bus(ahd);
-	ahd_unlock(ahd, &s);
-	ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0);
-	ahd_lock(ahd, &s);
-	if (ahd->platform_data->dv_pid < 0) {
-		printf("%s: Failed to create DV thread, error= %d\n",
-		       ahd_name(ahd), ahd->platform_data->dv_pid);
-		return (-ahd->platform_data->dv_pid);
-	}
-	/*
-	 * Initially allocate *all* of our linux target objects
-	 * so that the DV thread will scan them all in parallel
-	 * just after driver initialization.  Any device that
-	 * does not exist will have its target object destroyed
-	 * by the selection timeout handler.  In the case of a
-	 * device that appears after the initial DV scan, async
-	 * negotiation will occur for the first command, and DV
-	 * will comence should that first command be successful.
-	 */
-	for (target = 0; target < host->max_id; target++) {
 
+	switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
+	case AHD_DEV_Q_BASIC:
+		scsi_adjust_queue_depth(sdev,
+					MSG_SIMPLE_TASK,
+					dev->openings + dev->active);
+		break;
+	case AHD_DEV_Q_TAGGED:
+		scsi_adjust_queue_depth(sdev,
+					MSG_ORDERED_TASK,
+					dev->openings + dev->active);
+		break;
+	default:
 		/*
-		 * Skip our own ID.  Some Compaq/HP storage devices
-		 * have enclosure management devices that respond to
-		 * single bit selection (i.e. selecting ourselves).
-		 * It is expected that either an external application
-		 * or a modified kernel will be used to probe this
-		 * ID if it is appropriate.  To accommodate these
-		 * installations, ahc_linux_alloc_target() will allocate
-		 * for our ID if asked to do so.
+		 * We allow the OS to queue 2 untagged transactions to
+		 * us at any time even though we can only execute them
+		 * serially on the controller/device.  This should
+		 * remove some latency.
 		 */
-		if (target == ahd->our_id) 
-			continue;
-
-		ahd_linux_alloc_target(ahd, 0, target);
+		scsi_adjust_queue_depth(sdev,
+					/*NON-TAGGED*/0,
+					/*queue depth*/2);
+		break;
 	}
-	ahd_intr_enable(ahd, TRUE);
-	ahd_linux_start_dv(ahd);
-	ahd_unlock(ahd, &s);
-
-	scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
-	scsi_scan_host(host);
-	return (0);
 }
 
-uint64_t
-ahd_linux_get_memsize(void)
+int
+ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
+			int lun, u_int tag, role_t role, uint32_t status)
 {
-	struct sysinfo si;
-
-	si_meminfo(&si);
-	return ((uint64_t)si.totalram << PAGE_SHIFT);
+	return 0;
 }
 
-/*
- * Find the smallest available unit number to use
- * for a new device.  We don't just use a static
- * count to handle the "repeated hot-(un)plug"
- * scenario.
- */
-static int
-ahd_linux_next_unit(void)
+static u_int
+ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
 {
-	struct ahd_softc *ahd;
-	int unit;
+	static int warned_user;
+	u_int tags;
 
-	unit = 0;
-retry:
-	TAILQ_FOREACH(ahd, &ahd_tailq, links) {
-		if (ahd->unit == unit) {
-			unit++;
-			goto retry;
+	tags = 0;
+	if ((ahd->user_discenable & devinfo->target_mask) != 0) {
+		if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
+
+			if (warned_user == 0) {
+				printf(KERN_WARNING
+"aic79xx: WARNING: Insufficient tag_info instances\n"
+"aic79xx: for installed controllers.  Using defaults\n"
+"aic79xx: Please update the aic79xx_tag_info array in\n"
+"aic79xx: the aic79xx_osm.c source file.\n");
+				warned_user++;
+			}
+			tags = AHD_MAX_QUEUE;
+		} else {
+			adapter_tag_info_t *tag_info;
+
+			tag_info = &aic79xx_tag_info[ahd->unit];
+			tags = tag_info->tag_commands[devinfo->target_offset];
+			if (tags > AHD_MAX_QUEUE)
+				tags = AHD_MAX_QUEUE;
 		}
 	}
-	return (unit);
+	return (tags);
 }
 
 /*
- * Place the SCSI bus into a known state by either resetting it,
- * or forcing transfer negotiations on the next command to any
- * target.
+ * Determines the queue depth for a given device.
  */
 static void
-ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
+ahd_linux_device_queue_depth(struct scsi_device *sdev)
 {
-	u_int target_id;
-	u_int numtarg;
+	struct	ahd_devinfo devinfo;
+	u_int	tags;
+	struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
 
-	target_id = 0;
-	numtarg = 0;
+	ahd_compile_devinfo(&devinfo,
+			    ahd->our_id,
+			    sdev->sdev_target->id, sdev->lun,
+			    sdev->sdev_target->channel == 0 ? 'A' : 'B',
+			    ROLE_INITIATOR);
+	tags = ahd_linux_user_tagdepth(ahd, &devinfo);
+	if (tags != 0 && sdev->tagged_supported != 0) {
 
-	if (aic79xx_no_reset != 0)
-		ahd->flags &= ~AHD_RESET_BUS_A;
+		ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
+		ahd_print_devinfo(ahd, &devinfo);
+		printf("Tagged Queuing enabled.  Depth %d\n", tags);
+	} else {
+		ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
+	}
+}
 
-	if ((ahd->flags & AHD_RESET_BUS_A) != 0)
-		ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
-	else
-		numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
+static int
+ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
+		      struct scsi_cmnd *cmd)
+{
+	struct	 scb *scb;
+	struct	 hardware_scb *hscb;
+	struct	 ahd_initiator_tinfo *tinfo;
+	struct	 ahd_tmode_tstate *tstate;
+	u_int	 col_idx;
+	uint16_t mask;
 
 	/*
-	 * Force negotiation to async for all targets that
-	 * will not see an initial bus reset.
+	 * Get an scb to use.
 	 */
-	for (; target_id < numtarg; target_id++) {
-		struct ahd_devinfo devinfo;
-		struct ahd_initiator_tinfo *tinfo;
-		struct ahd_tmode_tstate *tstate;
-
-		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
-					    target_id, &tstate);
-		ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
-				    CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
-		ahd_update_neg_request(ahd, &devinfo, tstate,
-				       tinfo, AHD_NEG_ALWAYS);
-	}
-	/* Give the bus some time to recover */
-	if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
-		ahd_freeze_simq(ahd);
-		init_timer(&ahd->platform_data->reset_timer);
-		ahd->platform_data->reset_timer.data = (u_long)ahd;
-		ahd->platform_data->reset_timer.expires =
-		    jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
-		ahd->platform_data->reset_timer.function =
-		    (ahd_linux_callback_t *)ahd_release_simq;
-		add_timer(&ahd->platform_data->reset_timer);
+	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+				    cmd->device->id, &tstate);
+	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
+	 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+		col_idx = AHD_NEVER_COL_IDX;
+	} else {
+		col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
+					    cmd->device->lun);
+	}
+	if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
+		ahd->flags |= AHD_RESOURCE_SHORTAGE;
+		return SCSI_MLQUEUE_HOST_BUSY;
 	}
-}
 
-int
-ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
-{
-	ahd->platform_data =
-	    malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
-	if (ahd->platform_data == NULL)
-		return (ENOMEM);
-	memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
-	TAILQ_INIT(&ahd->platform_data->completeq);
-	ahd->platform_data->irq = AHD_LINUX_NOIRQ;
-	ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
-	ahd_lockinit(ahd);
-	ahd_done_lockinit(ahd);
-	init_timer(&ahd->platform_data->completeq_timer);
-	ahd->platform_data->completeq_timer.data = (u_long)ahd;
-	ahd->platform_data->completeq_timer.function =
-	    (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue;
-	init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
-	init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
-	init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
-	ahd->seltime = (aic79xx_seltime & 0x3) << 4;
-	return (0);
-}
+	scb->io_ctx = cmd;
+	scb->platform_data->dev = dev;
+	hscb = scb->hscb;
+	cmd->host_scribble = (char *)scb;
 
-void
-ahd_platform_free(struct ahd_softc *ahd)
-{
-	struct ahd_linux_target *targ;
-	struct ahd_linux_device *dev;
-	int i, j;
+	/*
+	 * Fill out basics of the HSCB.
+	 */
+	hscb->control = 0;
+	hscb->scsiid = BUILD_SCSIID(ahd, cmd);
+	hscb->lun = cmd->device->lun;
+	scb->hscb->task_management = 0;
+	mask = SCB_GET_TARGET_MASK(ahd, scb);
 
-	if (ahd->platform_data != NULL) {
-		del_timer_sync(&ahd->platform_data->completeq_timer);
-		ahd_linux_kill_dv_thread(ahd);
-		if (ahd->platform_data->host != NULL) {
-			scsi_remove_host(ahd->platform_data->host);
-			scsi_host_put(ahd->platform_data->host);
-		}
+	if ((ahd->user_discenable & mask) != 0)
+		hscb->control |= DISCENB;
 
-		/* destroy all of the device and target objects */
-		for (i = 0; i < AHD_NUM_TARGETS; i++) {
-			targ = ahd->platform_data->targets[i];
-			if (targ != NULL) {
-				/* Keep target around through the loop. */
-				targ->refcount++;
-				for (j = 0; j < AHD_NUM_LUNS; j++) {
+	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
+		scb->flags |= SCB_PACKETIZED;
 
-					if (targ->devices[j] == NULL)
-						continue;
-					dev = targ->devices[j];
-					ahd_linux_free_device(ahd, dev);
-				}
-				/*
-				 * Forcibly free the target now that
-				 * all devices are gone.
-				 */
-				ahd_linux_free_target(ahd, targ);
-			}
+	if ((tstate->auto_negotiate & mask) != 0) {
+		scb->flags |= SCB_AUTO_NEGOTIATE;
+		scb->hscb->control |= MK_MESSAGE;
+	}
+
+	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
+		int	msg_bytes;
+		uint8_t tag_msgs[2];
+
+		msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
+		if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
+			hscb->control |= tag_msgs[0];
+			if (tag_msgs[0] == MSG_ORDERED_TASK)
+				dev->commands_since_idle_or_otag = 0;
+		} else
+		if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
+		 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
+			hscb->control |= MSG_ORDERED_TASK;
+			dev->commands_since_idle_or_otag = 0;
+		} else {
+			hscb->control |= MSG_SIMPLE_TASK;
 		}
+	}
 
-		if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
-			free_irq(ahd->platform_data->irq, ahd);
-		if (ahd->tags[0] == BUS_SPACE_PIO
-		 && ahd->bshs[0].ioport != 0)
-			release_region(ahd->bshs[0].ioport, 256);
-		if (ahd->tags[1] == BUS_SPACE_PIO
-		 && ahd->bshs[1].ioport != 0)
-			release_region(ahd->bshs[1].ioport, 256);
-		if (ahd->tags[0] == BUS_SPACE_MEMIO
-		 && ahd->bshs[0].maddr != NULL) {
-			iounmap(ahd->bshs[0].maddr);
-			release_mem_region(ahd->platform_data->mem_busaddr,
-					   0x1000);
+	hscb->cdb_len = cmd->cmd_len;
+	memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
+
+	scb->platform_data->xfer_len = 0;
+	ahd_set_residual(scb, 0);
+	ahd_set_sense_residual(scb, 0);
+	scb->sg_count = 0;
+	if (cmd->use_sg != 0) {
+		void	*sg;
+		struct	 scatterlist *cur_seg;
+		u_int	 nseg;
+		int	 dir;
+
+		cur_seg = (struct scatterlist *)cmd->request_buffer;
+		dir = cmd->sc_data_direction;
+		nseg = pci_map_sg(ahd->dev_softc, cur_seg,
+				  cmd->use_sg, dir);
+		scb->platform_data->xfer_len = 0;
+		for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
+			dma_addr_t addr;
+			bus_size_t len;
+
+			addr = sg_dma_address(cur_seg);
+			len = sg_dma_len(cur_seg);
+			scb->platform_data->xfer_len += len;
+			sg = ahd_sg_setup(ahd, scb, sg, addr, len,
+					  /*last*/nseg == 1);
 		}
-		free(ahd->platform_data, M_DEVBUF);
+	} else if (cmd->request_bufflen != 0) {
+		void *sg;
+		dma_addr_t addr;
+		int dir;
+
+		sg = scb->sg_list;
+		dir = cmd->sc_data_direction;
+		addr = pci_map_single(ahd->dev_softc,
+				      cmd->request_buffer,
+				      cmd->request_bufflen, dir);
+		scb->platform_data->xfer_len = cmd->request_bufflen;
+		scb->platform_data->buf_busaddr = addr;
+		sg = ahd_sg_setup(ahd, scb, sg, addr,
+				  cmd->request_bufflen, /*last*/TRUE);
 	}
+
+	LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
+	dev->openings--;
+	dev->active++;
+	dev->commands_issued++;
+
+	if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
+		dev->commands_since_idle_or_otag++;
+	scb->flags |= SCB_ACTIVE;
+	ahd_queue_scb(ahd, scb);
+
+	return 0;
 }
 
-void
-ahd_platform_init(struct ahd_softc *ahd)
+/*
+ * SCSI controller interrupt handler.
+ */
+irqreturn_t
+ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
 {
-	/*
-	 * Lookup and commit any modified IO Cell options.
-	 */
-	if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
-		struct ahd_linux_iocell_opts *iocell_opts;
-
-		iocell_opts = &aic79xx_iocell_info[ahd->unit];
-		if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
-			AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
-		if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
-			AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
-		if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
-			AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
-	}
+	struct	ahd_softc *ahd;
+	u_long	flags;
+	int	ours;
 
+	ahd = (struct ahd_softc *) dev_id;
+	ahd_lock(ahd, &flags); 
+	ours = ahd_intr(ahd);
+	ahd_unlock(ahd, &flags);
+	return IRQ_RETVAL(ours);
 }
 
 void
-ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
+ahd_platform_flushwork(struct ahd_softc *ahd)
 {
-	ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
-				SCB_GET_CHANNEL(ahd, scb),
-				SCB_GET_LUN(scb), SCB_LIST_NULL,
-				ROLE_UNKNOWN, CAM_REQUEUE_REQ);
+
 }
 
 void
-ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
-		      ahd_queue_alg alg)
+ahd_send_async(struct ahd_softc *ahd, char channel,
+	       u_int target, u_int lun, ac_code code, void *arg)
 {
-	struct ahd_linux_device *dev;
-	int was_queuing;
-	int now_queuing;
+	switch (code) {
+	case AC_TRANSFER_NEG:
+	{
+		char	buf[80];
+		struct  scsi_target *starget;
+		struct	ahd_linux_target *targ;
+		struct	info_str info;
+		struct	ahd_initiator_tinfo *tinfo;
+		struct	ahd_tmode_tstate *tstate;
+		unsigned int target_ppr_options;
 
-	dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
-				   devinfo->target,
-				   devinfo->lun, /*alloc*/FALSE);
-	if (dev == NULL)
-		return;
-	was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
-	switch (alg) {
-	default:
-	case AHD_QUEUE_NONE:
-		now_queuing = 0;
-		break; 
-	case AHD_QUEUE_BASIC:
-		now_queuing = AHD_DEV_Q_BASIC;
+		BUG_ON(target == CAM_TARGET_WILDCARD);
+
+		info.buffer = buf;
+		info.length = sizeof(buf);
+		info.offset = 0;
+		info.pos = 0;
+		tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
+					    target, &tstate);
+
+		/*
+		 * Don't bother reporting results while
+		 * negotiations are still pending.
+		 */
+		if (tinfo->curr.period != tinfo->goal.period
+		 || tinfo->curr.width != tinfo->goal.width
+		 || tinfo->curr.offset != tinfo->goal.offset
+		 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
+			if (bootverbose == 0)
+				break;
+
+		/*
+		 * Don't bother reporting results that
+		 * are identical to those last reported.
+		 */
+		starget = ahd->platform_data->starget[target];
+		targ = scsi_transport_target_data(starget);
+		if (targ == NULL)
+			break;
+
+		target_ppr_options =
+			(spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
+			+ (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
+			+ (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0);
+
+		if (tinfo->curr.period == spi_period(starget)
+		    && tinfo->curr.width == spi_width(starget)
+		    && tinfo->curr.offset == spi_offset(starget)
+		 && tinfo->curr.ppr_options == target_ppr_options)
+			if (bootverbose == 0)
+				break;
+
+		spi_period(starget) = tinfo->curr.period;
+		spi_width(starget) = tinfo->curr.width;
+		spi_offset(starget) = tinfo->curr.offset;
+		spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
+		spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
+		spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
+		spi_display_xfer_agreement(starget);
 		break;
-	case AHD_QUEUE_TAGGED:
-		now_queuing = AHD_DEV_Q_TAGGED;
+	}
+        case AC_SENT_BDR:
+	{
+		WARN_ON(lun != CAM_LUN_WILDCARD);
+		scsi_report_device_reset(ahd->platform_data->host,
+					 channel - 'A', target);
 		break;
 	}
-	if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
-	 && (was_queuing != now_queuing)
-	 && (dev->active != 0)) {
-		dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
-		dev->qfrozen++;
-	}
-
-	dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
-	if (now_queuing) {
-		u_int usertags;
-
-		usertags = ahd_linux_user_tagdepth(ahd, devinfo);
-		if (!was_queuing) {
-			/*
-			 * Start out agressively and allow our
-			 * dynamic queue depth algorithm to take
-			 * care of the rest.
-			 */
-			dev->maxtags = usertags;
-			dev->openings = dev->maxtags - dev->active;
-		}
-		if (dev->maxtags == 0) {
-			/*
-			 * Queueing is disabled by the user.
-			 */
-			dev->openings = 1;
-		} else if (alg == AHD_QUEUE_TAGGED) {
-			dev->flags |= AHD_DEV_Q_TAGGED;
-			if (aic79xx_periodic_otag != 0)
-				dev->flags |= AHD_DEV_PERIODIC_OTAG;
-		} else
-			dev->flags |= AHD_DEV_Q_BASIC;
-	} else {
-		/* We can only have one opening. */
-		dev->maxtags = 0;
-		dev->openings =  1 - dev->active;
-	}
-
-	if (dev->scsi_device != NULL) {
-		switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
-		case AHD_DEV_Q_BASIC:
-			scsi_adjust_queue_depth(dev->scsi_device,
-						MSG_SIMPLE_TASK,
-						dev->openings + dev->active);
-			break;
-		case AHD_DEV_Q_TAGGED:
-			scsi_adjust_queue_depth(dev->scsi_device,
-						MSG_ORDERED_TASK,
-						dev->openings + dev->active);
-			break;
-		default:
-			/*
-			 * We allow the OS to queue 2 untagged transactions to
-			 * us at any time even though we can only execute them
-			 * serially on the controller/device.  This should
-			 * remove some latency.
-			 */
-			scsi_adjust_queue_depth(dev->scsi_device,
-						/*NON-TAGGED*/0,
-						/*queue depth*/2);
-			break;
+        case AC_BUS_RESET:
+		if (ahd->platform_data->host != NULL) {
+			scsi_report_bus_reset(ahd->platform_data->host,
+					      channel - 'A');
 		}
-	}
-}
-
-int
-ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
-			int lun, u_int tag, role_t role, uint32_t status)
-{
-	return 0;
-}
-
-static void
-ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd)
-{
-	u_long flags;
-
-	ahd_lock(ahd, &flags);
-	del_timer(&ahd->platform_data->completeq_timer);
-	ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER;
-	ahd_linux_run_complete_queue(ahd);
-	ahd_unlock(ahd, &flags);
+                break;
+        default:
+                panic("ahd_send_async: Unexpected async event");
+        }
 }
 
-static void
-ahd_linux_start_dv(struct ahd_softc *ahd)
+/*
+ * Calls the higher level scsi done function and frees the scb.
+ */
+void
+ahd_done(struct ahd_softc *ahd, struct scb *scb)
 {
+	struct scsi_cmnd *cmd;
+	struct	  ahd_linux_device *dev;
 
-	/*
-	 * Freeze the simq and signal ahd_linux_queue to not let any
-	 * more commands through
-	 */
-	if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) {
-#ifdef AHD_DEBUG
-		if (ahd_debug & AHD_SHOW_DV)
-			printf("%s: Starting DV\n", ahd_name(ahd));
-#endif
-
-		ahd->platform_data->flags |= AHD_DV_ACTIVE;
-		ahd_freeze_simq(ahd);
-
-		/* Wake up the DV kthread */
-		up(&ahd->platform_data->dv_sem);
+	if ((scb->flags & SCB_ACTIVE) == 0) {
+		printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
+		ahd_dump_card_state(ahd);
+		panic("Stopping for safety");
 	}
-}
-
-static int
-ahd_linux_dv_thread(void *data)
-{
-	struct	ahd_softc *ahd;
-	int	target;
-	u_long	s;
-
-	ahd = (struct ahd_softc *)data;
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV)
-		printf("In DV Thread\n");
-#endif
+	LIST_REMOVE(scb, pending_links);
+	cmd = scb->io_ctx;
+	dev = scb->platform_data->dev;
+	dev->active--;
+	dev->openings++;
+	if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
+		cmd->result &= ~(CAM_DEV_QFRZN << 16);
+		dev->qfrozen--;
+	}
+	ahd_linux_unmap_scb(ahd, scb);
 
 	/*
-	 * Complete thread creation.
+	 * Guard against stale sense data.
+	 * The Linux mid-layer assumes that sense
+	 * was retrieved anytime the first byte of
+	 * the sense buffer looks "sane".
 	 */
-	lock_kernel();
-
-	daemonize("ahd_dv_%d", ahd->unit);
-	current->flags |= PF_FREEZE;
-
-	unlock_kernel();
-
-	while (1) {
-		/*
-		 * Use down_interruptible() rather than down() to
-		 * avoid inclusion in the load average.
-		 */
-		down_interruptible(&ahd->platform_data->dv_sem);
-
-		/* Check to see if we've been signaled to exit */
-		ahd_lock(ahd, &s);
-		if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) {
-			ahd_unlock(ahd, &s);
-			break;
-		}
-		ahd_unlock(ahd, &s);
+	cmd->sense_buffer[0] = 0;
+	if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
+		uint32_t amount_xferred;
 
+		amount_xferred =
+		    ahd_get_transfer_length(scb) - ahd_get_residual(scb);
+		if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
 #ifdef AHD_DEBUG
-		if (ahd_debug & AHD_SHOW_DV)
-			printf("%s: Beginning Domain Validation\n",
-			       ahd_name(ahd));
+			if ((ahd_debug & AHD_SHOW_MISC) != 0) {
+				ahd_print_path(ahd, scb);
+				printf("Set CAM_UNCOR_PARITY\n");
+			}
 #endif
-
+			ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
+#ifdef AHD_REPORT_UNDERFLOWS
 		/*
-		 * Wait for any pending commands to drain before proceeding.
+		 * This code is disabled by default as some
+		 * clients of the SCSI system do not properly
+		 * initialize the underflow parameter.  This
+		 * results in spurious termination of commands
+		 * that complete as expected (e.g. underflow is
+		 * allowed as command can return variable amounts
+		 * of data.
 		 */
-		ahd_lock(ahd, &s);
-		while (LIST_FIRST(&ahd->pending_scbs) != NULL) {
-			ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY;
-			ahd_unlock(ahd, &s);
-			down_interruptible(&ahd->platform_data->dv_sem);
-			ahd_lock(ahd, &s);
-		}
+		} else if (amount_xferred < scb->io_ctx->underflow) {
+			u_int i;
 
-		/*
-		 * Wait for the SIMQ to be released so that DV is the
-		 * only reason the queue is frozen.
-		 */
-		while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
-			ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
-			ahd_unlock(ahd, &s);
-			down_interruptible(&ahd->platform_data->dv_sem);
-			ahd_lock(ahd, &s);
+			ahd_print_path(ahd, scb);
+			printf("CDB:");
+			for (i = 0; i < scb->io_ctx->cmd_len; i++)
+				printf(" 0x%x", scb->io_ctx->cmnd[i]);
+			printf("\n");
+			ahd_print_path(ahd, scb);
+			printf("Saw underflow (%ld of %ld bytes). "
+			       "Treated as error\n",
+				ahd_get_residual(scb),
+				ahd_get_transfer_length(scb));
+			ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
+#endif
+		} else {
+			ahd_set_transaction_status(scb, CAM_REQ_CMP);
 		}
-		ahd_unlock(ahd, &s);
+	} else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
+		ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
+	}
 
-		for (target = 0; target < AHD_NUM_TARGETS; target++)
-			ahd_linux_dv_target(ahd, target);
+	if (dev->openings == 1
+	 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
+	 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
+		dev->tag_success_count++;
+	/*
+	 * Some devices deal with temporary internal resource
+	 * shortages by returning queue full.  When the queue
+	 * full occurrs, we throttle back.  Slowly try to get
+	 * back to our previous queue depth.
+	 */
+	if ((dev->openings + dev->active) < dev->maxtags
+	 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
+		dev->tag_success_count = 0;
+		dev->openings++;
+	}
 
-		ahd_lock(ahd, &s);
-		ahd->platform_data->flags &= ~AHD_DV_ACTIVE;
-		ahd_unlock(ahd, &s);
+	if (dev->active == 0)
+		dev->commands_since_idle_or_otag = 0;
 
-		/*
-		 * Release the SIMQ so that normal commands are
-		 * allowed to continue on the bus.
-		 */
-		ahd_release_simq(ahd);
+	if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
+		printf("Recovery SCB completes\n");
+		if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
+		 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
+			ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
+		if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
+			ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
+			up(&ahd->platform_data->eh_sem);
+		}
 	}
-	up(&ahd->platform_data->eh_sem);
-	return (0);
+
+	ahd_free_scb(ahd, scb);
+	ahd_linux_queue_cmd_complete(ahd, cmd);
 }
 
 static void
-ahd_linux_kill_dv_thread(struct ahd_softc *ahd)
+ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
+			     struct scsi_device *sdev, struct scb *scb)
 {
-	u_long s;
-
-	ahd_lock(ahd, &s);
-	if (ahd->platform_data->dv_pid != 0) {
-		ahd->platform_data->flags |= AHD_DV_SHUTDOWN;
-		ahd_unlock(ahd, &s);
-		up(&ahd->platform_data->dv_sem);
+	struct	ahd_devinfo devinfo;
+	struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
 
-		/*
-		 * Use the eh_sem as an indicator that the
-		 * dv thread is exiting.  Note that the dv
-		 * thread must still return after performing
-		 * the up on our semaphore before it has
-		 * completely exited this module.  Unfortunately,
-		 * there seems to be no easy way to wait for the
-		 * exit of a thread for which you are not the
-		 * parent (dv threads are parented by init).
-		 * Cross your fingers...
-		 */
-		down(&ahd->platform_data->eh_sem);
+	ahd_compile_devinfo(&devinfo,
+			    ahd->our_id,
+			    sdev->sdev_target->id, sdev->lun,
+			    sdev->sdev_target->channel == 0 ? 'A' : 'B',
+			    ROLE_INITIATOR);
+	
+	/*
+	 * We don't currently trust the mid-layer to
+	 * properly deal with queue full or busy.  So,
+	 * when one occurs, we tell the mid-layer to
+	 * unconditionally requeue the command to us
+	 * so that we can retry it ourselves.  We also
+	 * implement our own throttling mechanism so
+	 * we don't clobber the device with too many
+	 * commands.
+	 */
+	switch (ahd_get_scsi_status(scb)) {
+	default:
+		break;
+	case SCSI_STATUS_CHECK_COND:
+	case SCSI_STATUS_CMD_TERMINATED:
+	{
+		struct scsi_cmnd *cmd;
 
 		/*
-		 * Mark the dv thread as already dead.  This
-		 * avoids attempting to kill it a second time.
-		 * This is necessary because we must kill the
-		 * DV thread before calling ahd_free() in the
-		 * module shutdown case to avoid bogus locking
-		 * in the SCSI mid-layer, but we ahd_free() is
-		 * called without killing the DV thread in the
-		 * instance detach case, so ahd_platform_free()
-		 * calls us again to verify that the DV thread
-		 * is dead.
+		 * Copy sense information to the OS's cmd
+		 * structure if it is available.
 		 */
-		ahd->platform_data->dv_pid = 0;
-	} else {
-		ahd_unlock(ahd, &s);
-	}
-}
-
-#define AHD_LINUX_DV_INQ_SHORT_LEN	36
-#define AHD_LINUX_DV_INQ_LEN		256
-#define AHD_LINUX_DV_TIMEOUT		(HZ / 4)
+		cmd = scb->io_ctx;
+		if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
+			struct scsi_status_iu_header *siu;
+			u_int sense_size;
+			u_int sense_offset;
 
-#define AHD_SET_DV_STATE(ahd, targ, newstate) \
-	ahd_set_dv_state(ahd, targ, newstate, __LINE__)
+			if (scb->flags & SCB_SENSE) {
+				sense_size = MIN(sizeof(struct scsi_sense_data)
+					       - ahd_get_sense_residual(scb),
+						 sizeof(cmd->sense_buffer));
+				sense_offset = 0;
+			} else {
+				/*
+				 * Copy only the sense data into the provided
+				 * buffer.
+				 */
+				siu = (struct scsi_status_iu_header *)
+				    scb->sense_data;
+				sense_size = MIN(scsi_4btoul(siu->sense_length),
+						sizeof(cmd->sense_buffer));
+				sense_offset = SIU_SENSE_OFFSET(siu);
+			}
 
-static __inline void
-ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ,
-		 ahd_dv_state newstate, u_int line)
-{
-	ahd_dv_state oldstate;
+			memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
+			memcpy(cmd->sense_buffer,
+			       ahd_get_sense_buf(ahd, scb)
+			       + sense_offset, sense_size);
+			cmd->result |= (DRIVER_SENSE << 24);
 
-	oldstate = targ->dv_state;
 #ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV)
-		printf("%s:%d: Going from state %d to state %d\n",
-		       ahd_name(ahd), line, oldstate, newstate);
-#endif
-
-	if (oldstate == newstate)
-		targ->dv_state_retry++;
-	else
-		targ->dv_state_retry = 0;
-	targ->dv_state = newstate;
-}
+			if (ahd_debug & AHD_SHOW_SENSE) {
+				int i;
 
-static void
-ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset)
-{
-	struct	 ahd_devinfo devinfo;
-	struct	 ahd_linux_target *targ;
-	struct	 scsi_cmnd *cmd;
-	struct	 scsi_device *scsi_dev;
-	struct	 scsi_sense_data *sense;
-	uint8_t *buffer;
-	u_long	 s;
-	u_int	 timeout;
-	int	 echo_size;
-
-	sense = NULL;
-	buffer = NULL;
-	echo_size = 0;
-	ahd_lock(ahd, &s);
-	targ = ahd->platform_data->targets[target_offset];
-	if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) {
-		ahd_unlock(ahd, &s);
-		return;
-	}
-	ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0,
-			    targ->channel + 'A', ROLE_INITIATOR);
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, &devinfo);
-		printf("Performing DV\n");
-	}
-#endif
-
-	ahd_unlock(ahd, &s);
-
-	cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
-	scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
-	scsi_dev->host = ahd->platform_data->host;
-	scsi_dev->id = devinfo.target;
-	scsi_dev->lun = devinfo.lun;
-	scsi_dev->channel = devinfo.channel - 'A';
-	ahd->platform_data->dv_scsi_dev = scsi_dev;
-
-	AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC);
-
-	while (targ->dv_state != AHD_DV_STATE_EXIT) {
-		timeout = AHD_LINUX_DV_TIMEOUT;
-		switch (targ->dv_state) {
-		case AHD_DV_STATE_INQ_SHORT_ASYNC:
-		case AHD_DV_STATE_INQ_ASYNC:
-		case AHD_DV_STATE_INQ_ASYNC_VERIFY:
-			/*
-			 * Set things to async narrow to reduce the
-			 * chance that the INQ will fail.
-			 */
-			ahd_lock(ahd, &s);
-			ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
-					 AHD_TRANS_GOAL, /*paused*/FALSE);
-			ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
-				      AHD_TRANS_GOAL, /*paused*/FALSE);
-			ahd_unlock(ahd, &s);
-			timeout = 10 * HZ;
-			targ->flags &= ~AHD_INQ_VALID;
-			/* FALLTHROUGH */
-		case AHD_DV_STATE_INQ_VERIFY:
-		{
-			u_int inq_len;
-
-			if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC)
-				inq_len = AHD_LINUX_DV_INQ_SHORT_LEN;
-			else
-				inq_len = targ->inq_data->additional_length + 5;
-			ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len);
-			break;
-		}
-		case AHD_DV_STATE_TUR:
-		case AHD_DV_STATE_BUSY:
-			timeout = 5 * HZ;
-			ahd_linux_dv_tur(ahd, cmd, &devinfo);
-			break;
-		case AHD_DV_STATE_REBD:
-			ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ);
-			break;
-		case AHD_DV_STATE_WEB:
-			ahd_linux_dv_web(ahd, cmd, &devinfo, targ);
-			break;
-
-		case AHD_DV_STATE_REB:
-			ahd_linux_dv_reb(ahd, cmd, &devinfo, targ);
-			break;
-
-		case AHD_DV_STATE_SU:
-			ahd_linux_dv_su(ahd, cmd, &devinfo, targ);
-			timeout = 50 * HZ;
-			break;
-
-		default:
-			ahd_print_devinfo(ahd, &devinfo);
-			printf("Unknown DV state %d\n", targ->dv_state);
-			goto out;
-		}
-
-		/* Queue the command and wait for it to complete */
-		/* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
-		init_timer(&cmd->eh_timeout);
-#ifdef AHD_DEBUG
-		if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
-			/*
-			 * All of the printfs during negotiation
-			 * really slow down the negotiation.
-			 * Add a bit of time just to be safe.
-			 */
-			timeout += HZ;
-#endif
-		scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout);
-		/*
-		 * In 2.5.X, it is assumed that all calls from the
-		 * "midlayer" (which we are emulating) will have the
-		 * ahd host lock held.  For other kernels, the
-		 * io_request_lock must be held.
-		 */
-#if AHD_SCSI_HAS_HOST_LOCK != 0
-		ahd_lock(ahd, &s);
-#else
-		spin_lock_irqsave(&io_request_lock, s);
-#endif
-		ahd_linux_queue(cmd, ahd_linux_dv_complete);
-#if AHD_SCSI_HAS_HOST_LOCK != 0
-		ahd_unlock(ahd, &s);
-#else
-		spin_unlock_irqrestore(&io_request_lock, s);
-#endif
-		down_interruptible(&ahd->platform_data->dv_cmd_sem);
-		/*
-		 * Wait for the SIMQ to be released so that DV is the
-		 * only reason the queue is frozen.
-		 */
-		ahd_lock(ahd, &s);
-		while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
-			ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
-			ahd_unlock(ahd, &s);
-			down_interruptible(&ahd->platform_data->dv_sem);
-			ahd_lock(ahd, &s);
-		}
-		ahd_unlock(ahd, &s);
-
-		ahd_linux_dv_transition(ahd, cmd, &devinfo, targ);
-	}
-
-out:
-	if ((targ->flags & AHD_INQ_VALID) != 0
-	 && ahd_linux_get_device(ahd, devinfo.channel - 'A',
-				 devinfo.target, devinfo.lun,
-				 /*alloc*/FALSE) == NULL) {
-		/*
-		 * The DV state machine failed to configure this device.  
-		 * This is normal if DV is disabled.  Since we have inquiry
-		 * data, filter it and use the "optimistic" negotiation
-		 * parameters found in the inquiry string.
-		 */
-		ahd_linux_filter_inquiry(ahd, &devinfo);
-		if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) {
-			ahd_print_devinfo(ahd, &devinfo);
-			printf("DV failed to configure device.  "
-			       "Please file a bug report against "
-			       "this driver.\n");
-		}
-	}
-
-	if (cmd != NULL)
-		free(cmd, M_DEVBUF);
-
-	if (ahd->platform_data->dv_scsi_dev != NULL) {
-		free(ahd->platform_data->dv_scsi_dev, M_DEVBUF);
-		ahd->platform_data->dv_scsi_dev = NULL;
-	}
-
-	ahd_lock(ahd, &s);
-	if (targ->dv_buffer != NULL) {
-		free(targ->dv_buffer, M_DEVBUF);
-		targ->dv_buffer = NULL;
-	}
-	if (targ->dv_buffer1 != NULL) {
-		free(targ->dv_buffer1, M_DEVBUF);
-		targ->dv_buffer1 = NULL;
-	}
-	targ->flags &= ~AHD_DV_REQUIRED;
-	if (targ->refcount == 0)
-		ahd_linux_free_target(ahd, targ);
-	ahd_unlock(ahd, &s);
-}
-
-static __inline int
-ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
-	u_long s;
-	int retval;
-
-	ahd_lock(ahd, &s);
-	retval = ahd_linux_fallback(ahd, devinfo);
-	ahd_unlock(ahd, &s);
-
-	return (retval);
-}
-
-static void
-ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-			struct ahd_devinfo *devinfo,
-			struct ahd_linux_target *targ)
-{
-	u_int32_t status;
-
-	status = aic_error_action(cmd, targ->inq_data,
-				  ahd_cmd_get_transaction_status(cmd),
-				  ahd_cmd_get_scsi_status(cmd));
-
-	
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Entering ahd_linux_dv_transition, state= %d, "
-		       "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
-		       status, cmd->result);
-	}
-#endif
-
-	switch (targ->dv_state) {
-	case AHD_DV_STATE_INQ_SHORT_ASYNC:
-	case AHD_DV_STATE_INQ_ASYNC:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-		{
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
-			break;
-		}
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_TUR:
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ)
-				targ->dv_state_retry--;
-			if ((status & SS_ERRMASK) == EBUSY)
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
-			if (targ->dv_state_retry < 10)
-				break;
-			/* FALLTHROUGH */
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("Failed DV inquiry, skipping\n");
-			}
-#endif
-			break;
-		}
-		break;
-	case AHD_DV_STATE_INQ_ASYNC_VERIFY:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-		{
-			u_int xportflags;
-			u_int spi3data;
-
-			if (memcmp(targ->inq_data, targ->dv_buffer,
-				   AHD_LINUX_DV_INQ_LEN) != 0) {
-				/*
-				 * Inquiry data must have changed.
-				 * Try from the top again.
-				 */
-				AHD_SET_DV_STATE(ahd, targ,
-						 AHD_DV_STATE_INQ_SHORT_ASYNC);
-				break;
-			}
-
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
-			targ->flags |= AHD_INQ_VALID;
-			if (ahd_linux_user_dv_setting(ahd) == 0)
-				break;
-
-			xportflags = targ->inq_data->flags;
-			if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
-				break;
-
-			spi3data = targ->inq_data->spi3data;
-			switch (spi3data & SID_SPI_CLOCK_DT_ST) {
-			default:
-			case SID_SPI_CLOCK_ST:
-				/* Assume only basic DV is supported. */
-				targ->flags |= AHD_BASIC_DV;
-				break;
-			case SID_SPI_CLOCK_DT:
-			case SID_SPI_CLOCK_DT_ST:
-				targ->flags |= AHD_ENHANCED_DV;
-				break;
-			}
-			break;
-		}
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_TUR:
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ)
-				targ->dv_state_retry--;
-
-			if ((status & SS_ERRMASK) == EBUSY)
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
-			if (targ->dv_state_retry < 10)
-				break;
-			/* FALLTHROUGH */
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("Failed DV inquiry, skipping\n");
-			}
-#endif
-			break;
-		}
-		break;
-	case AHD_DV_STATE_INQ_VERIFY:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-		{
-
-			if (memcmp(targ->inq_data, targ->dv_buffer,
-				   AHD_LINUX_DV_INQ_LEN) == 0) {
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-				break;
-			}
-
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				int i;
-
-				ahd_print_devinfo(ahd, devinfo);
-				printf("Inquiry buffer mismatch:");
-				for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) {
+				printf("Copied %d bytes of sense data at %d:",
+				       sense_size, sense_offset);
+				for (i = 0; i < sense_size; i++) {
 					if ((i & 0xF) == 0)
-						printf("\n        ");
-					printf("0x%x:0x0%x ",
-					       ((uint8_t *)targ->inq_data)[i], 
-					       targ->dv_buffer[i]);
+						printf("\n");
+					printf("0x%x ", cmd->sense_buffer[i]);
 				}
 				printf("\n");
 			}
 #endif
-
-			if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-				break;
-			}
-			/*
-			 * Do not count "falling back"
-			 * against our retries.
-			 */
-			targ->dv_state_retry = 0;
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			break;
-		}
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_TUR:
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ) {
-				targ->dv_state_retry--;
-			} else if ((status & SSQ_FALLBACK) != 0) {
-				if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
-					AHD_SET_DV_STATE(ahd, targ,
-							 AHD_DV_STATE_EXIT);
-					break;
-				}
-				/*
-				 * Do not count "falling back"
-				 * against our retries.
-				 */
-				targ->dv_state_retry = 0;
-			} else if ((status & SS_ERRMASK) == EBUSY)
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
-			if (targ->dv_state_retry < 10)
-				break;
-			/* FALLTHROUGH */
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("Failed DV inquiry, skipping\n");
-			}
-#endif
-			break;
-		}
-		break;
-
-	case AHD_DV_STATE_TUR:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-			if ((targ->flags & AHD_BASIC_DV) != 0) {
-				ahd_linux_filter_inquiry(ahd, devinfo);
-				AHD_SET_DV_STATE(ahd, targ,
-						 AHD_DV_STATE_INQ_VERIFY);
-			} else if ((targ->flags & AHD_ENHANCED_DV) != 0) {
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD);
-			} else {
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			}
-			break;
-		case SS_RETRY:
-		case SS_TUR:
-			if ((status & SS_ERRMASK) == EBUSY) {
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
-				break;
-			}
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ) {
-				targ->dv_state_retry--;
-			} else if ((status & SSQ_FALLBACK) != 0) {
-				if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
-					AHD_SET_DV_STATE(ahd, targ,
-							 AHD_DV_STATE_EXIT);
-					break;
-				}
-				/*
-				 * Do not count "falling back"
-				 * against our retries.
-				 */
-				targ->dv_state_retry = 0;
-			}
-			if (targ->dv_state_retry >= 10) {
-#ifdef AHD_DEBUG
-				if (ahd_debug & AHD_SHOW_DV) {
-					ahd_print_devinfo(ahd, devinfo);
-					printf("DV TUR reties exhausted\n");
-				}
-#endif
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-				break;
-			}
-			if (status & SSQ_DELAY)
-				ssleep(1);
-
-			break;
-		case SS_START:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU);
-			break;
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			break;
 		}
 		break;
-
-	case AHD_DV_STATE_REBD:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-		{
-			uint32_t echo_size;
-
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
-			echo_size = scsi_3btoul(&targ->dv_buffer[1]);
-			echo_size &= 0x1FFF;
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("Echo buffer size= %d\n", echo_size);
-			}
-#endif
-			if (echo_size == 0) {
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-				break;
-			}
-
-			/* Generate the buffer pattern */
-			targ->dv_echo_size = echo_size;
-			ahd_linux_generate_dv_pattern(targ);
+	}
+	case SCSI_STATUS_QUEUE_FULL:
+		/*
+		 * By the time the core driver has returned this
+		 * command, all other commands that were queued
+		 * to us but not the device have been returned.
+		 * This ensures that dev->active is equal to
+		 * the number of commands actually queued to
+		 * the device.
+		 */
+		dev->tag_success_count = 0;
+		if (dev->active != 0) {
 			/*
-			 * Setup initial negotiation values.
+			 * Drop our opening count to the number
+			 * of commands currently outstanding.
 			 */
-			ahd_linux_filter_inquiry(ahd, devinfo);
-			break;
-		}
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ)
-				targ->dv_state_retry--;
-			if (targ->dv_state_retry <= 10)
-				break;
+			dev->openings = 0;
 #ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("DV REBD reties exhausted\n");
+			if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
+				ahd_print_path(ahd, scb);
+				printf("Dropping tag count to %d\n",
+				       dev->active);
 			}
 #endif
-			/* FALLTHROUGH */
-		case SS_FATAL:
-		default:
-			/*
-			 * Setup initial negotiation values
-			 * and try level 1 DV.
-			 */
-			ahd_linux_filter_inquiry(ahd, devinfo);
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY);
-			targ->dv_echo_size = 0;
-			break;
-		}
-		break;
+			if (dev->active == dev->tags_on_last_queuefull) {
 
-	case AHD_DV_STATE_WEB:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB);
-			break;
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ) {
-				targ->dv_state_retry--;
-			} else if ((status & SSQ_FALLBACK) != 0) {
-				if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
-					AHD_SET_DV_STATE(ahd, targ,
-							 AHD_DV_STATE_EXIT);
-					break;
-				}
+				dev->last_queuefull_same_count++;
 				/*
-				 * Do not count "falling back"
-				 * against our retries.
+				 * If we repeatedly see a queue full
+				 * at the same queue depth, this
+				 * device has a fixed number of tag
+				 * slots.  Lock in this tag depth
+				 * so we stop seeing queue fulls from
+				 * this device.
 				 */
-				targ->dv_state_retry = 0;
-			}
-			if (targ->dv_state_retry <= 10)
-				break;
-			/* FALLTHROUGH */
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("DV WEB reties exhausted\n");
-			}
-#endif
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			break;
-		}
-		break;
-
-	case AHD_DV_STATE_REB:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-			if (memcmp(targ->dv_buffer, targ->dv_buffer1,
-				   targ->dv_echo_size) != 0) {
-				if (ahd_linux_dv_fallback(ahd, devinfo) != 0)
-					AHD_SET_DV_STATE(ahd, targ,
-							 AHD_DV_STATE_EXIT);
-				else
-					AHD_SET_DV_STATE(ahd, targ,
-							 AHD_DV_STATE_WEB);
-				break;
-			}
-			
-			if (targ->dv_buffer != NULL) {
-				free(targ->dv_buffer, M_DEVBUF);
-				targ->dv_buffer = NULL;
-			}
-			if (targ->dv_buffer1 != NULL) {
-				free(targ->dv_buffer1, M_DEVBUF);
-				targ->dv_buffer1 = NULL;
-			}
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			break;
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ) {
-				targ->dv_state_retry--;
-			} else if ((status & SSQ_FALLBACK) != 0) {
-				if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
-					AHD_SET_DV_STATE(ahd, targ,
-							 AHD_DV_STATE_EXIT);
-					break;
+				if (dev->last_queuefull_same_count
+				 == AHD_LOCK_TAGS_COUNT) {
+					dev->maxtags = dev->active;
+					ahd_print_path(ahd, scb);
+					printf("Locking max tag count at %d\n",
+					       dev->active);
 				}
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
-			}
-			if (targ->dv_state_retry <= 10) {
-				if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
-					msleep(ahd->our_id*1000/10);
-				break;
-			}
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_DV) {
-				ahd_print_devinfo(ahd, devinfo);
-				printf("DV REB reties exhausted\n");
+			} else {
+				dev->tags_on_last_queuefull = dev->active;
+				dev->last_queuefull_same_count = 0;
 			}
-#endif
-			/* FALLTHROUGH */
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			break;
-		}
-		break;
-
-	case AHD_DV_STATE_SU:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+			ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
+			ahd_set_scsi_status(scb, SCSI_STATUS_OK);
+			ahd_platform_set_tags(ahd, &devinfo,
+				     (dev->flags & AHD_DEV_Q_BASIC)
+				   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
 			break;
 		}
-		break;
-
-	case AHD_DV_STATE_BUSY:
-		switch (status & SS_MASK) {
-		case SS_NOP:
-		case SS_INQ_REFRESH:
-			AHD_SET_DV_STATE(ahd, targ,
-					 AHD_DV_STATE_INQ_SHORT_ASYNC);
-			break;
-		case SS_TUR:
-		case SS_RETRY:
-			AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
-			if (ahd_cmd_get_transaction_status(cmd)
-			 == CAM_REQUEUE_REQ) {
-				targ->dv_state_retry--;
-			} else if (targ->dv_state_retry < 60) {
-				if ((status & SSQ_DELAY) != 0)
-					ssleep(1);
-			} else {
-#ifdef AHD_DEBUG
-				if (ahd_debug & AHD_SHOW_DV) {
-					ahd_print_devinfo(ahd, devinfo);
-					printf("DV BUSY reties exhausted\n");
-				}
-#endif
-				AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			}
-			break;
-		default:
-			AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-			break;
-		}
-		break;
-
-	default:
-		printf("%s: Invalid DV completion state %d\n", ahd_name(ahd),
-		       targ->dv_state);
-		AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-		break;
-	}
-}
-
-static void
-ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		      struct ahd_devinfo *devinfo)
-{
-	memset(cmd, 0, sizeof(struct scsi_cmnd));
-	cmd->device = ahd->platform_data->dv_scsi_dev;
-	cmd->scsi_done = ahd_linux_dv_complete;
-}
-
-/*
- * Synthesize an inquiry command.  On the return trip, it'll be
- * sniffed and the device transfer settings set for us.
- */
-static void
-ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ,
-		 u_int request_length)
-{
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Sending INQ\n");
-	}
-#endif
-	if (targ->inq_data == NULL)
-		targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN,
-					M_DEVBUF, M_WAITOK);
-	if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) {
-		if (targ->dv_buffer != NULL)
-			free(targ->dv_buffer, M_DEVBUF);
-		targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN,
-					 M_DEVBUF, M_WAITOK);
-	}
-
-	ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
-	cmd->sc_data_direction = DMA_FROM_DEVICE;
-	cmd->cmd_len = 6;
-	cmd->cmnd[0] = INQUIRY;
-	cmd->cmnd[4] = request_length;
-	cmd->request_bufflen = request_length;
-	if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC)
-		cmd->request_buffer = targ->dv_buffer;
-	else
-		cmd->request_buffer = targ->inq_data;
-	memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN);
-}
-
-static void
-ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		 struct ahd_devinfo *devinfo)
-{
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Sending TUR\n");
-	}
-#endif
-	/* Do a TUR to clear out any non-fatal transitional state */
-	ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
-	cmd->sc_data_direction = DMA_NONE;
-	cmd->cmd_len = 6;
-	cmd->cmnd[0] = TEST_UNIT_READY;
-}
-
-#define AHD_REBD_LEN 4
-
-static void
-ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Sending REBD\n");
-	}
-#endif
-	if (targ->dv_buffer != NULL)
-		free(targ->dv_buffer, M_DEVBUF);
-	targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK);
-	ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
-	cmd->sc_data_direction = DMA_FROM_DEVICE;
-	cmd->cmd_len = 10;
-	cmd->cmnd[0] = READ_BUFFER;
-	cmd->cmnd[1] = 0x0b;
-	scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]);
-	cmd->request_bufflen = AHD_REBD_LEN;
-	cmd->underflow = cmd->request_bufflen;
-	cmd->request_buffer = targ->dv_buffer;
-}
-
-static void
-ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Sending WEB\n");
-	}
-#endif
-	ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
-	cmd->sc_data_direction = DMA_TO_DEVICE;
-	cmd->cmd_len = 10;
-	cmd->cmnd[0] = WRITE_BUFFER;
-	cmd->cmnd[1] = 0x0a;
-	scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
-	cmd->request_bufflen = targ->dv_echo_size;
-	cmd->underflow = cmd->request_bufflen;
-	cmd->request_buffer = targ->dv_buffer;
-}
-
-static void
-ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Sending REB\n");
-	}
-#endif
-	ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
-	cmd->sc_data_direction = DMA_FROM_DEVICE;
-	cmd->cmd_len = 10;
-	cmd->cmnd[0] = READ_BUFFER;
-	cmd->cmnd[1] = 0x0a;
-	scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
-	cmd->request_bufflen = targ->dv_echo_size;
-	cmd->underflow = cmd->request_bufflen;
-	cmd->request_buffer = targ->dv_buffer1;
-}
-
-static void
-ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
-		struct ahd_devinfo *devinfo,
-		struct ahd_linux_target *targ)
-{
-	u_int le;
-
-	le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Sending SU\n");
-	}
-#endif
-	ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
-	cmd->sc_data_direction = DMA_NONE;
-	cmd->cmd_len = 6;
-	cmd->cmnd[0] = START_STOP_UNIT;
-	cmd->cmnd[4] = le | SSS_START;
-}
-
-static int
-ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
-	struct	ahd_linux_target *targ;
-	struct	ahd_initiator_tinfo *tinfo;
-	struct	ahd_transinfo *goal;
-	struct	ahd_tmode_tstate *tstate;
-	u_int	width;
-	u_int	period;
-	u_int	offset;
-	u_int	ppr_options;
-	u_int	cur_speed;
-	u_int	wide_speed;
-	u_int	narrow_speed;
-	u_int	fallback_speed;
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		ahd_print_devinfo(ahd, devinfo);
-		printf("Trying to fallback\n");
-	}
-#endif
-	targ = ahd->platform_data->targets[devinfo->target_offset];
-	tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
-				    devinfo->our_scsiid,
-				    devinfo->target, &tstate);
-	goal = &tinfo->goal;
-	width = goal->width;
-	period = goal->period;
-	offset = goal->offset;
-	ppr_options = goal->ppr_options;
-	if (offset == 0)
-		period = AHD_ASYNC_XFER_PERIOD;
-	if (targ->dv_next_narrow_period == 0)
-		targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2);
-	if (targ->dv_next_wide_period == 0)
-		targ->dv_next_wide_period = period;
-	if (targ->dv_max_width == 0)
-		targ->dv_max_width = width;
-	if (targ->dv_max_ppr_options == 0)
-		targ->dv_max_ppr_options = ppr_options;
-	if (targ->dv_last_ppr_options == 0)
-		targ->dv_last_ppr_options = ppr_options;
-
-	cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN);
-	wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
-					  targ->dv_next_wide_period,
-					  MAX_OFFSET, AHD_SYNCRATE_MIN);
-	narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
-					    targ->dv_next_narrow_period,
-					    MAX_OFFSET, AHD_SYNCRATE_MIN);
-	fallback_speed = aic_calc_speed(width, period+1, offset,
-					      AHD_SYNCRATE_MIN);
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
-		       "fallback_speed= %d\n", cur_speed, wide_speed,
-		       narrow_speed, fallback_speed);
-	}
-#endif
-
-	if (cur_speed > 160000) {
-		/*
-		 * Paced/DT/IU_REQ only transfer speeds.  All we
-		 * can do is fallback in terms of syncrate.
-		 */
-		period++;
-	} else if (cur_speed > 80000) {
-		if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
-			/*
-			 * Try without IU_REQ as it may be confusing
-			 * an expander.
-			 */
-			ppr_options &= ~MSG_EXT_PPR_IU_REQ;
-		} else {
-			/*
-			 * Paced/DT only transfer speeds.  All we
-			 * can do is fallback in terms of syncrate.
-			 */
-			period++;
-			ppr_options = targ->dv_max_ppr_options;
-		}
-	} else if (cur_speed > 3300) {
-
-		/*
-		 * In this range we the following
-		 * options ordered from highest to
-		 * lowest desireability:
-		 *
-		 * o Wide/DT
-		 * o Wide/non-DT
-		 * o Narrow at a potentally higher sync rate.
-		 *
-		 * All modes are tested with and without IU_REQ
-		 * set since using IUs may confuse an expander.
-		 */
-		if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
-
-			ppr_options &= ~MSG_EXT_PPR_IU_REQ;
-		} else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
-			/*
-			 * Try going non-DT.
-			 */
-			ppr_options = targ->dv_max_ppr_options;
-			ppr_options &= ~MSG_EXT_PPR_DT_REQ;
-		} else if (targ->dv_last_ppr_options != 0) {
-			/*
-			 * Try without QAS or any other PPR options.
-			 * We may need a non-PPR message to work with
-			 * an expander.  We look at the "last PPR options"
-			 * so we will perform this fallback even if the
-			 * target responded to our PPR negotiation with
-			 * no option bits set.
-			 */
-			ppr_options = 0;
-		} else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
-			/*
-			 * If the next narrow speed is greater than
-			 * the next wide speed, fallback to narrow.
-			 * Otherwise fallback to the next DT/Wide setting.
-			 * The narrow async speed will always be smaller
-			 * than the wide async speed, so handle this case
-			 * specifically.
-			 */
-			ppr_options = targ->dv_max_ppr_options;
-			if (narrow_speed > fallback_speed
-			 || period >= AHD_ASYNC_XFER_PERIOD) {
-				targ->dv_next_wide_period = period+1;
-				width = MSG_EXT_WDTR_BUS_8_BIT;
-				period = targ->dv_next_narrow_period;
-			} else {
-				period++;
-			}
-		} else if ((ahd->features & AHD_WIDE) != 0
-			&& targ->dv_max_width != 0
-			&& wide_speed >= fallback_speed
-			&& (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD
-			 || period >= AHD_ASYNC_XFER_PERIOD)) {
-
-			/*
-			 * We are narrow.  Try falling back
-			 * to the next wide speed with 
-			 * all supported ppr options set.
-			 */
-			targ->dv_next_narrow_period = period+1;
-			width = MSG_EXT_WDTR_BUS_16_BIT;
-			period = targ->dv_next_wide_period;
-			ppr_options = targ->dv_max_ppr_options;
-		} else {
-			/* Only narrow fallback is allowed. */
-			period++;
-			ppr_options = targ->dv_max_ppr_options;
-		}
-	} else {
-		return (-1);
-	}
-	offset = MAX_OFFSET;
-	ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED);
-	ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE);
-	if (period == 0) {
-		period = 0;
-		offset = 0;
-		ppr_options = 0;
-		if (width == MSG_EXT_WDTR_BUS_8_BIT)
-			targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD;
-		else
-			targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD;
-	}
-	ahd_set_syncrate(ahd, devinfo, period, offset,
-			 ppr_options, AHD_TRANS_GOAL, FALSE);
-	targ->dv_last_ppr_options = ppr_options;
-	return (0);
-}
-
-static void
-ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
-{
-	struct	ahd_softc *ahd;
-	struct	scb *scb;
-	u_long	flags;
-
-	ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
-	ahd_lock(ahd, &flags);
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV) {
-		printf("%s: Timeout while doing DV command %x.\n",
-		       ahd_name(ahd), cmd->cmnd[0]);
-		ahd_dump_card_state(ahd);
-	}
-#endif
-	
-	/*
-	 * Guard against "done race".  No action is
-	 * required if we just completed.
-	 */
-	if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
-		ahd_unlock(ahd, &flags);
-		return;
-	}
-
-	/*
-	 * Command has not completed.  Mark this
-	 * SCB as having failing status prior to
-	 * resetting the bus, so we get the correct
-	 * error code.
-	 */
-	if ((scb->flags & SCB_SENSE) != 0)
-		ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
-	else
-		ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
-	ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE);
-
-	/*
-	 * Add a minimal bus settle delay for devices that are slow to
-	 * respond after bus resets.
-	 */
-	ahd_freeze_simq(ahd);
-	init_timer(&ahd->platform_data->reset_timer);
-	ahd->platform_data->reset_timer.data = (u_long)ahd;
-	ahd->platform_data->reset_timer.expires = jiffies + HZ / 2;
-	ahd->platform_data->reset_timer.function =
-	    (ahd_linux_callback_t *)ahd_release_simq;
-	add_timer(&ahd->platform_data->reset_timer);
-	ahd_linux_run_complete_queue(ahd);
-	ahd_unlock(ahd, &flags);
-}
-
-static void
-ahd_linux_dv_complete(struct scsi_cmnd *cmd)
-{
-	struct ahd_softc *ahd;
-
-	ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
-
-	/* Delete the DV timer before it goes off! */
-	scsi_delete_timer(cmd);
-
-#ifdef AHD_DEBUG
-	if (ahd_debug & AHD_SHOW_DV)
-		printf("%s:%c:%d: Command completed, status= 0x%x\n",
-		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
-		       cmd->result);
-#endif
-
-	/* Wake up the state machine */
-	up(&ahd->platform_data->dv_cmd_sem);
-}
-
-static void
-ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ)
-{
-	uint16_t b;
-	u_int	 i;
-	u_int	 j;
-
-	if (targ->dv_buffer != NULL)
-		free(targ->dv_buffer, M_DEVBUF);
-	targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
-	if (targ->dv_buffer1 != NULL)
-		free(targ->dv_buffer1, M_DEVBUF);
-	targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
-
-	i = 0;
-
-	b = 0x0001;
-	for (j = 0 ; i < targ->dv_echo_size; j++) {
-		if (j < 32) {
-			/*
-			 * 32bytes of sequential numbers.
-			 */
-			targ->dv_buffer[i++] = j & 0xff;
-		} else if (j < 48) {
-			/*
-			 * 32bytes of repeating 0x0000, 0xffff.
-			 */
-			targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
-		} else if (j < 64) {
-			/*
-			 * 32bytes of repeating 0x5555, 0xaaaa.
-			 */
-			targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
-		} else {
-			/*
-			 * Remaining buffer is filled with a repeating
-			 * patter of:
-			 *
-			 *	 0xffff
-			 *	~0x0001 << shifted once in each loop.
-			 */
-			if (j & 0x02) {
-				if (j & 0x01) {
-					targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
-					b <<= 1;
-					if (b == 0x0000)
-						b = 0x0001;
-				} else {
-					targ->dv_buffer[i++] = (~b & 0xff);
-				}
-			} else {
-				targ->dv_buffer[i++] = 0xff;
-			}
-		}
-	}
-}
-
-static u_int
-ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
-	static int warned_user;
-	u_int tags;
-
-	tags = 0;
-	if ((ahd->user_discenable & devinfo->target_mask) != 0) {
-		if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
-
-			if (warned_user == 0) {
-				printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient tag_info instances\n"
-"aic79xx: for installed controllers.  Using defaults\n"
-"aic79xx: Please update the aic79xx_tag_info array in\n"
-"aic79xx: the aic79xx_osm.c source file.\n");
-				warned_user++;
-			}
-			tags = AHD_MAX_QUEUE;
-		} else {
-			adapter_tag_info_t *tag_info;
-
-			tag_info = &aic79xx_tag_info[ahd->unit];
-			tags = tag_info->tag_commands[devinfo->target_offset];
-			if (tags > AHD_MAX_QUEUE)
-				tags = AHD_MAX_QUEUE;
-		}
-	}
-	return (tags);
-}
-
-static u_int
-ahd_linux_user_dv_setting(struct ahd_softc *ahd)
-{
-	static int warned_user;
-	int dv;
-
-	if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) {
-
-		if (warned_user == 0) {
-			printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient dv settings instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_dv_settings array in"
-"aic79xx: the aic79xx_osm.c source file.\n");
-			warned_user++;
-		}
-		dv = -1;
-	} else {
-
-		dv = aic79xx_dv_settings[ahd->unit];
-	}
-
-	if (dv < 0) {
 		/*
-		 * Apply the default.
+		 * Drop down to a single opening, and treat this
+		 * as if the target returned BUSY SCSI status.
 		 */
-		dv = 1;
-		if (ahd->seep_config != 0)
-			dv = (ahd->seep_config->bios_control & CFENABLEDV);
-	}
-	return (dv);
-}
-
-static void
-ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd)
-{
-	static	int warned_user;
-	u_int	rd_strm_mask;
-	u_int	target_id;
-
-	/*
-	 * If we have specific read streaming info for this controller,
-	 * apply it.  Otherwise use the defaults.
-	 */
-	 if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) {
-
-		if (warned_user == 0) {
-
-			printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient rd_strm instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_rd_strm_info array\n"
-"aic79xx: in the aic79xx_osm.c source file.\n");
-			warned_user++;
-		}
-		rd_strm_mask = AIC79XX_CONFIGED_RD_STRM;
-	} else {
-
-		rd_strm_mask = aic79xx_rd_strm_info[ahd->unit];
-	}
-	for (target_id = 0; target_id < 16; target_id++) {
-		struct ahd_devinfo devinfo;
-		struct ahd_initiator_tinfo *tinfo;
-		struct ahd_tmode_tstate *tstate;
-
-		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
-					    target_id, &tstate);
-		ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
-				    CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
-		tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM;
-		if ((rd_strm_mask & devinfo.target_mask) != 0)
-			tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM;
-	}
-}
-
-/*
- * Determines the queue depth for a given device.
- */
-static void
-ahd_linux_device_queue_depth(struct ahd_softc *ahd,
-			     struct ahd_linux_device *dev)
-{
-	struct	ahd_devinfo devinfo;
-	u_int	tags;
-
-	ahd_compile_devinfo(&devinfo,
-			    ahd->our_id,
-			    dev->target->target, dev->lun,
-			    dev->target->channel == 0 ? 'A' : 'B',
-			    ROLE_INITIATOR);
-	tags = ahd_linux_user_tagdepth(ahd, &devinfo);
-	if (tags != 0
-	 && dev->scsi_device != NULL
-	 && dev->scsi_device->tagged_supported != 0) {
-
-		ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
-		ahd_print_devinfo(ahd, &devinfo);
-		printf("Tagged Queuing enabled.  Depth %d\n", tags);
-	} else {
-		ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
-	}
-}
-
-static int
-ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
-		      struct scsi_cmnd *cmd)
-{
-	struct	 scb *scb;
-	struct	 hardware_scb *hscb;
-	struct	 ahd_initiator_tinfo *tinfo;
-	struct	 ahd_tmode_tstate *tstate;
-	u_int	 col_idx;
-	uint16_t mask;
-
-	/*
-	 * Get an scb to use.
-	 */
-	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
-				    cmd->device->id, &tstate);
-	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
-	 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
-		col_idx = AHD_NEVER_COL_IDX;
-	} else {
-		col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
-					    cmd->device->lun);
-	}
-	if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
-		ahd->flags |= AHD_RESOURCE_SHORTAGE;
-		return SCSI_MLQUEUE_HOST_BUSY;
-	}
-
-	scb->io_ctx = cmd;
-	scb->platform_data->dev = dev;
-	hscb = scb->hscb;
-	cmd->host_scribble = (char *)scb;
-
-	/*
-	 * Fill out basics of the HSCB.
-	 */
-	hscb->control = 0;
-	hscb->scsiid = BUILD_SCSIID(ahd, cmd);
-	hscb->lun = cmd->device->lun;
-	scb->hscb->task_management = 0;
-	mask = SCB_GET_TARGET_MASK(ahd, scb);
-
-	if ((ahd->user_discenable & mask) != 0)
-		hscb->control |= DISCENB;
-
- 	if (AHD_DV_CMD(cmd) != 0)
-		scb->flags |= SCB_SILENT;
-
-	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
-		scb->flags |= SCB_PACKETIZED;
-
-	if ((tstate->auto_negotiate & mask) != 0) {
-		scb->flags |= SCB_AUTO_NEGOTIATE;
-		scb->hscb->control |= MK_MESSAGE;
-	}
-
-	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
-		int	msg_bytes;
-		uint8_t tag_msgs[2];
-
-		msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
-		if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
-			hscb->control |= tag_msgs[0];
-			if (tag_msgs[0] == MSG_ORDERED_TASK)
-				dev->commands_since_idle_or_otag = 0;
-		} else
-		if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
-		 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
-			hscb->control |= MSG_ORDERED_TASK;
-			dev->commands_since_idle_or_otag = 0;
-		} else {
-			hscb->control |= MSG_SIMPLE_TASK;
-		}
-	}
-
-	hscb->cdb_len = cmd->cmd_len;
-	memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
-
-	scb->sg_count = 0;
-	ahd_set_residual(scb, 0);
-	ahd_set_sense_residual(scb, 0);
-	if (cmd->use_sg != 0) {
-		void	*sg;
-		struct	 scatterlist *cur_seg;
-		u_int	 nseg;
-		int	 dir;
-
-		cur_seg = (struct scatterlist *)cmd->request_buffer;
-		dir = cmd->sc_data_direction;
-		nseg = pci_map_sg(ahd->dev_softc, cur_seg,
-				  cmd->use_sg, dir);
-		scb->platform_data->xfer_len = 0;
-		for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
-			dma_addr_t addr;
-			bus_size_t len;
-
-			addr = sg_dma_address(cur_seg);
-			len = sg_dma_len(cur_seg);
-			scb->platform_data->xfer_len += len;
-			sg = ahd_sg_setup(ahd, scb, sg, addr, len,
-					  /*last*/nseg == 1);
-		}
-	} else if (cmd->request_bufflen != 0) {
-		void *sg;
-		dma_addr_t addr;
-		int dir;
-
-		sg = scb->sg_list;
-		dir = cmd->sc_data_direction;
-		addr = pci_map_single(ahd->dev_softc,
-				      cmd->request_buffer,
-				      cmd->request_bufflen, dir);
-		scb->platform_data->xfer_len = cmd->request_bufflen;
-		scb->platform_data->buf_busaddr = addr;
-		sg = ahd_sg_setup(ahd, scb, sg, addr,
-				  cmd->request_bufflen, /*last*/TRUE);
-	}
-
-	LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
-	dev->openings--;
-	dev->active++;
-	dev->commands_issued++;
-
-	/* Update the error counting bucket and dump if needed */
-	if (dev->target->cmds_since_error) {
-		dev->target->cmds_since_error++;
-		if (dev->target->cmds_since_error >
-		    AHD_LINUX_ERR_THRESH)
-			dev->target->cmds_since_error = 0;
-	}
-
-	if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
-		dev->commands_since_idle_or_otag++;
-	scb->flags |= SCB_ACTIVE;
-	ahd_queue_scb(ahd, scb);
-
-	return 0;
-}
-
-/*
- * SCSI controller interrupt handler.
- */
-irqreturn_t
-ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
-{
-	struct	ahd_softc *ahd;
-	u_long	flags;
-	int	ours;
-
-	ahd = (struct ahd_softc *) dev_id;
-	ahd_lock(ahd, &flags); 
-	ours = ahd_intr(ahd);
-	ahd_linux_run_complete_queue(ahd);
-	ahd_unlock(ahd, &flags);
-	return IRQ_RETVAL(ours);
-}
-
-void
-ahd_platform_flushwork(struct ahd_softc *ahd)
-{
-
-	while (ahd_linux_run_complete_queue(ahd) != NULL)
-		;
-}
-
-static struct ahd_linux_target*
-ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target)
-{
-	struct ahd_linux_target *targ;
-
-	targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT);
-	if (targ == NULL)
-		return (NULL);
-	memset(targ, 0, sizeof(*targ));
-	targ->channel = channel;
-	targ->target = target;
-	targ->ahd = ahd;
-	targ->flags = AHD_DV_REQUIRED;
-	ahd->platform_data->targets[target] = targ;
-	return (targ);
-}
-
-static void
-ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ)
-{
-	struct ahd_devinfo devinfo;
-	struct ahd_initiator_tinfo *tinfo;
-	struct ahd_tmode_tstate *tstate;
-	u_int our_id;
-	u_int target_offset;
-	char channel;
-
-	/*
-	 * Force a negotiation to async/narrow on any
-	 * future command to this device unless a bus
-	 * reset occurs between now and that command.
-	 */
-	channel = 'A' + targ->channel;
-	our_id = ahd->our_id;
-	target_offset = targ->target;
-	tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
-				    targ->target, &tstate);
-	ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
-			    channel, ROLE_INITIATOR);
-	ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
-			 AHD_TRANS_GOAL, /*paused*/FALSE);
-	ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
-		      AHD_TRANS_GOAL, /*paused*/FALSE);
-	ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS);
- 	ahd->platform_data->targets[target_offset] = NULL;
-	if (targ->inq_data != NULL)
-		free(targ->inq_data, M_DEVBUF);
-	if (targ->dv_buffer != NULL)
-		free(targ->dv_buffer, M_DEVBUF);
-	if (targ->dv_buffer1 != NULL)
-		free(targ->dv_buffer1, M_DEVBUF);
-	free(targ, M_DEVBUF);
+		dev->openings = 1;
+		ahd_platform_set_tags(ahd, &devinfo,
+			     (dev->flags & AHD_DEV_Q_BASIC)
+			   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
+		ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
+	}
 }
 
-static struct ahd_linux_device*
-ahd_linux_alloc_device(struct ahd_softc *ahd,
-		 struct ahd_linux_target *targ, u_int lun)
+static void
+ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
 {
-	struct ahd_linux_device *dev;
-
-	dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
-	if (dev == NULL)
-		return (NULL);
-	memset(dev, 0, sizeof(*dev));
-	init_timer(&dev->timer);
-	dev->flags = AHD_DEV_UNCONFIGURED;
-	dev->lun = lun;
-	dev->target = targ;
-
 	/*
-	 * We start out life using untagged
-	 * transactions of which we allow one.
+	 * Map CAM error codes into Linux Error codes.  We
+	 * avoid the conversion so that the DV code has the
+	 * full error information available when making
+	 * state change decisions.
 	 */
-	dev->openings = 1;
+	{
+		uint32_t status;
+		u_int new_status;
 
-	/*
-	 * Set maxtags to 0.  This will be changed if we
-	 * later determine that we are dealing with
-	 * a tagged queuing capable device.
-	 */
-	dev->maxtags = 0;
-	
-	targ->refcount++;
-	targ->devices[lun] = dev;
-	return (dev);
+		status = ahd_cmd_get_transaction_status(cmd);
+		switch (status) {
+		case CAM_REQ_INPROG:
+		case CAM_REQ_CMP:
+		case CAM_SCSI_STATUS_ERROR:
+			new_status = DID_OK;
+			break;
+		case CAM_REQ_ABORTED:
+			new_status = DID_ABORT;
+			break;
+		case CAM_BUSY:
+			new_status = DID_BUS_BUSY;
+			break;
+		case CAM_REQ_INVALID:
+		case CAM_PATH_INVALID:
+			new_status = DID_BAD_TARGET;
+			break;
+		case CAM_SEL_TIMEOUT:
+			new_status = DID_NO_CONNECT;
+			break;
+		case CAM_SCSI_BUS_RESET:
+		case CAM_BDR_SENT:
+			new_status = DID_RESET;
+			break;
+		case CAM_UNCOR_PARITY:
+			new_status = DID_PARITY;
+			break;
+		case CAM_CMD_TIMEOUT:
+			new_status = DID_TIME_OUT;
+			break;
+		case CAM_UA_ABORT:
+		case CAM_REQ_CMP_ERR:
+		case CAM_AUTOSENSE_FAIL:
+		case CAM_NO_HBA:
+		case CAM_DATA_RUN_ERR:
+		case CAM_UNEXP_BUSFREE:
+		case CAM_SEQUENCE_FAIL:
+		case CAM_CCB_LEN_ERR:
+		case CAM_PROVIDE_FAIL:
+		case CAM_REQ_TERMIO:
+		case CAM_UNREC_HBA_ERROR:
+		case CAM_REQ_TOO_BIG:
+			new_status = DID_ERROR;
+			break;
+		case CAM_REQUEUE_REQ:
+			new_status = DID_REQUEUE;
+			break;
+		default:
+			/* We should never get here */
+			new_status = DID_ERROR;
+			break;
+		}
+
+		ahd_cmd_set_transaction_status(cmd, new_status);
+	}
+
+	cmd->scsi_done(cmd);
 }
 
 static void
-ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev)
+ahd_linux_sem_timeout(u_long arg)
 {
-	struct ahd_linux_target *targ;
+	struct	ahd_softc *ahd;
+	u_long	s;
 
-	del_timer(&dev->timer);
-	targ = dev->target;
-	targ->devices[dev->lun] = NULL;
-	free(dev, M_DEVBUF);
-	targ->refcount--;
-	if (targ->refcount == 0
-	 && (targ->flags & AHD_DV_REQUIRED) == 0)
-		ahd_linux_free_target(ahd, targ);
+	ahd = (struct ahd_softc *)arg;
+
+	ahd_lock(ahd, &s);
+	if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
+		ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
+		up(&ahd->platform_data->eh_sem);
+	}
+	ahd_unlock(ahd, &s);
 }
 
 void
-ahd_send_async(struct ahd_softc *ahd, char channel,
-	       u_int target, u_int lun, ac_code code, void *arg)
+ahd_freeze_simq(struct ahd_softc *ahd)
 {
-	switch (code) {
-	case AC_TRANSFER_NEG:
-	{
-		char	buf[80];
-		struct	ahd_linux_target *targ;
-		struct	info_str info;
-		struct	ahd_initiator_tinfo *tinfo;
-		struct	ahd_tmode_tstate *tstate;
-
-		info.buffer = buf;
-		info.length = sizeof(buf);
-		info.offset = 0;
-		info.pos = 0;
-		tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
-					    target, &tstate);
-
-		/*
-		 * Don't bother reporting results while
-		 * negotiations are still pending.
-		 */
-		if (tinfo->curr.period != tinfo->goal.period
-		 || tinfo->curr.width != tinfo->goal.width
-		 || tinfo->curr.offset != tinfo->goal.offset
-		 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
-			if (bootverbose == 0)
-				break;
-
-		/*
-		 * Don't bother reporting results that
-		 * are identical to those last reported.
-		 */
-		targ = ahd->platform_data->targets[target];
-		if (targ == NULL)
-			break;
-		if (tinfo->curr.period == targ->last_tinfo.period
-		 && tinfo->curr.width == targ->last_tinfo.width
-		 && tinfo->curr.offset == targ->last_tinfo.offset
-		 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
-			if (bootverbose == 0)
-				break;
-
-		targ->last_tinfo.period = tinfo->curr.period;
-		targ->last_tinfo.width = tinfo->curr.width;
-		targ->last_tinfo.offset = tinfo->curr.offset;
-		targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
-
-		printf("(%s:%c:", ahd_name(ahd), channel);
-		if (target == CAM_TARGET_WILDCARD)
-			printf("*): ");
-		else
-			printf("%d): ", target);
-		ahd_format_transinfo(&info, &tinfo->curr);
-		if (info.pos < info.length)
-			*info.buffer = '\0';
-		else
-			buf[info.length - 1] = '\0';
-		printf("%s", buf);
-		break;
-	}
-        case AC_SENT_BDR:
-	{
-		WARN_ON(lun != CAM_LUN_WILDCARD);
-		scsi_report_device_reset(ahd->platform_data->host,
-					 channel - 'A', target);
-		break;
+	ahd->platform_data->qfrozen++;
+	if (ahd->platform_data->qfrozen == 1) {
+		scsi_block_requests(ahd->platform_data->host);
+		ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
+					CAM_LUN_WILDCARD, SCB_LIST_NULL,
+					ROLE_INITIATOR, CAM_REQUEUE_REQ);
 	}
-        case AC_BUS_RESET:
-		if (ahd->platform_data->host != NULL) {
-			scsi_report_bus_reset(ahd->platform_data->host,
-					      channel - 'A');
-		}
-                break;
-        default:
-                panic("ahd_send_async: Unexpected async event");
-        }
 }
 
-/*
- * Calls the higher level scsi done function and frees the scb.
- */
 void
-ahd_done(struct ahd_softc *ahd, struct scb *scb)
+ahd_release_simq(struct ahd_softc *ahd)
 {
-	Scsi_Cmnd *cmd;
-	struct	  ahd_linux_device *dev;
+	u_long s;
+	int    unblock_reqs;
 
-	if ((scb->flags & SCB_ACTIVE) == 0) {
-		printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
-		ahd_dump_card_state(ahd);
-		panic("Stopping for safety");
-	}
-	LIST_REMOVE(scb, pending_links);
-	cmd = scb->io_ctx;
-	dev = scb->platform_data->dev;
-	dev->active--;
-	dev->openings++;
-	if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
-		cmd->result &= ~(CAM_DEV_QFRZN << 16);
-		dev->qfrozen--;
+	unblock_reqs = 0;
+	ahd_lock(ahd, &s);
+	if (ahd->platform_data->qfrozen > 0)
+		ahd->platform_data->qfrozen--;
+	if (ahd->platform_data->qfrozen == 0) {
+		unblock_reqs = 1;
 	}
-	ahd_linux_unmap_scb(ahd, scb);
-
+	ahd_unlock(ahd, &s);
 	/*
-	 * Guard against stale sense data.
-	 * The Linux mid-layer assumes that sense
-	 * was retrieved anytime the first byte of
-	 * the sense buffer looks "sane".
+	 * There is still a race here.  The mid-layer
+	 * should keep its own freeze count and use
+	 * a bottom half handler to run the queues
+	 * so we can unblock with our own lock held.
 	 */
-	cmd->sense_buffer[0] = 0;
-	if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
-		uint32_t amount_xferred;
+	if (unblock_reqs)
+		scsi_unblock_requests(ahd->platform_data->host);
+}
 
-		amount_xferred =
-		    ahd_get_transfer_length(scb) - ahd_get_residual(scb);
-		if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
-#ifdef AHD_DEBUG
-			if ((ahd_debug & AHD_SHOW_MISC) != 0) {
-				ahd_print_path(ahd, scb);
-				printf("Set CAM_UNCOR_PARITY\n");
-			}
-#endif
-			ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
-#ifdef AHD_REPORT_UNDERFLOWS
-		/*
-		 * This code is disabled by default as some
-		 * clients of the SCSI system do not properly
-		 * initialize the underflow parameter.  This
-		 * results in spurious termination of commands
-		 * that complete as expected (e.g. underflow is
-		 * allowed as command can return variable amounts
-		 * of data.
-		 */
-		} else if (amount_xferred < scb->io_ctx->underflow) {
-			u_int i;
+static int
+ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
+{
+	struct ahd_softc *ahd;
+	struct ahd_linux_device *dev;
+	struct scb *pending_scb;
+	u_int  saved_scbptr;
+	u_int  active_scbptr;
+	u_int  last_phase;
+	u_int  saved_scsiid;
+	u_int  cdb_byte;
+	int    retval;
+	int    was_paused;
+	int    paused;
+	int    wait;
+	int    disconnected;
+	ahd_mode_state saved_modes;
+
+	pending_scb = NULL;
+	paused = FALSE;
+	wait = FALSE;
+	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+
+	printf("%s:%d:%d:%d: Attempting to queue a%s message:",
+	       ahd_name(ahd), cmd->device->channel,
+	       cmd->device->id, cmd->device->lun,
+	       flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
+
+	printf("CDB:");
+	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
+		printf(" 0x%x", cmd->cmnd[cdb_byte]);
+	printf("\n");
+
+	spin_lock_irq(&ahd->platform_data->spin_lock);
 
-			ahd_print_path(ahd, scb);
-			printf("CDB:");
-			for (i = 0; i < scb->io_ctx->cmd_len; i++)
-				printf(" 0x%x", scb->io_ctx->cmnd[i]);
-			printf("\n");
-			ahd_print_path(ahd, scb);
-			printf("Saw underflow (%ld of %ld bytes). "
-			       "Treated as error\n",
-				ahd_get_residual(scb),
-				ahd_get_transfer_length(scb));
-			ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
-#endif
-		} else {
-			ahd_set_transaction_status(scb, CAM_REQ_CMP);
-		}
-	} else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
-		ahd_linux_handle_scsi_status(ahd, dev, scb);
-	} else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
-		dev->flags |= AHD_DEV_UNCONFIGURED;
-		if (AHD_DV_CMD(cmd) == FALSE)
-			dev->target->flags &= ~AHD_DV_REQUIRED;
-	}
 	/*
-	 * Start DV for devices that require it assuming the first command
-	 * sent does not result in a selection timeout.
+	 * First determine if we currently own this command.
+	 * Start by searching the device queue.  If not found
+	 * there, check the pending_scb list.  If not found
+	 * at all, and the system wanted us to just abort the
+	 * command, return success.
 	 */
-	if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT
-	 && (dev->target->flags & AHD_DV_REQUIRED) != 0)
-		ahd_linux_start_dv(ahd);
+	dev = scsi_transport_device_data(cmd->device);
+
+	if (dev == NULL) {
+		/*
+		 * No target device for this command exists,
+		 * so we must not still own the command.
+		 */
+		printf("%s:%d:%d:%d: Is not an active device\n",
+		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
+		       cmd->device->lun);
+		retval = SUCCESS;
+		goto no_cmd;
+	}
 
-	if (dev->openings == 1
-	 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
-	 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
-		dev->tag_success_count++;
 	/*
-	 * Some devices deal with temporary internal resource
-	 * shortages by returning queue full.  When the queue
-	 * full occurrs, we throttle back.  Slowly try to get
-	 * back to our previous queue depth.
+	 * See if we can find a matching cmd in the pending list.
 	 */
-	if ((dev->openings + dev->active) < dev->maxtags
-	 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
-		dev->tag_success_count = 0;
-		dev->openings++;
+	LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
+		if (pending_scb->io_ctx == cmd)
+			break;
 	}
 
-	if (dev->active == 0)
-		dev->commands_since_idle_or_otag = 0;
-
-	if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
-	    && dev->active == 0
-	    && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
-		ahd_linux_free_device(ahd, dev);
+	if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
 
-	if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
-		printf("Recovery SCB completes\n");
-		if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
-		 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
-			ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
-		if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
-			scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
-			up(&ahd->platform_data->eh_sem);
+		/* Any SCB for this device will do for a target reset */
+		LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
+		  	if (ahd_match_scb(ahd, pending_scb, cmd->device->id,
+					  cmd->device->channel + 'A',
+					  CAM_LUN_WILDCARD,
+					  SCB_LIST_NULL, ROLE_INITIATOR) == 0)
+				break;
 		}
 	}
 
-	ahd_free_scb(ahd, scb);
-	ahd_linux_queue_cmd_complete(ahd, cmd);
-
-	if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0
-	 && LIST_FIRST(&ahd->pending_scbs) == NULL) {
-		ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY;
-		up(&ahd->platform_data->dv_sem);
+	if (pending_scb == NULL) {
+		printf("%s:%d:%d:%d: Command not found\n",
+		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
+		       cmd->device->lun);
+		goto no_cmd;
 	}
-}
 
-static void
-ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
-			     struct ahd_linux_device *dev, struct scb *scb)
-{
-	struct	ahd_devinfo devinfo;
+	if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
+		/*
+		 * We can't queue two recovery actions using the same SCB
+		 */
+		retval = FAILED;
+		goto  done;
+	}
 
-	ahd_compile_devinfo(&devinfo,
-			    ahd->our_id,
-			    dev->target->target, dev->lun,
-			    dev->target->channel == 0 ? 'A' : 'B',
-			    ROLE_INITIATOR);
-	
 	/*
-	 * We don't currently trust the mid-layer to
-	 * properly deal with queue full or busy.  So,
-	 * when one occurs, we tell the mid-layer to
-	 * unconditionally requeue the command to us
-	 * so that we can retry it ourselves.  We also
-	 * implement our own throttling mechanism so
-	 * we don't clobber the device with too many
-	 * commands.
+	 * Ensure that the card doesn't do anything
+	 * behind our back.  Also make sure that we
+	 * didn't "just" miss an interrupt that would
+	 * affect this cmd.
 	 */
-	switch (ahd_get_scsi_status(scb)) {
-	default:
-		break;
-	case SCSI_STATUS_CHECK_COND:
-	case SCSI_STATUS_CMD_TERMINATED:
-	{
-		Scsi_Cmnd *cmd;
+	was_paused = ahd_is_paused(ahd);
+	ahd_pause_and_flushwork(ahd);
+	paused = TRUE;
 
-		/*
-		 * Copy sense information to the OS's cmd
-		 * structure if it is available.
-		 */
-		cmd = scb->io_ctx;
-		if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
-			struct scsi_status_iu_header *siu;
-			u_int sense_size;
-			u_int sense_offset;
+	if ((pending_scb->flags & SCB_ACTIVE) == 0) {
+		printf("%s:%d:%d:%d: Command already completed\n",
+		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
+		       cmd->device->lun);
+		goto no_cmd;
+	}
 
-			if (scb->flags & SCB_SENSE) {
-				sense_size = MIN(sizeof(struct scsi_sense_data)
-					       - ahd_get_sense_residual(scb),
-						 sizeof(cmd->sense_buffer));
-				sense_offset = 0;
-			} else {
-				/*
-				 * Copy only the sense data into the provided
-				 * buffer.
-				 */
-				siu = (struct scsi_status_iu_header *)
-				    scb->sense_data;
-				sense_size = MIN(scsi_4btoul(siu->sense_length),
-						sizeof(cmd->sense_buffer));
-				sense_offset = SIU_SENSE_OFFSET(siu);
-			}
+	printf("%s: At time of recovery, card was %spaused\n",
+	       ahd_name(ahd), was_paused ? "" : "not ");
+	ahd_dump_card_state(ahd);
 
-			memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
-			memcpy(cmd->sense_buffer,
-			       ahd_get_sense_buf(ahd, scb)
-			       + sense_offset, sense_size);
-			cmd->result |= (DRIVER_SENSE << 24);
+	disconnected = TRUE;
+	if (flag == SCB_ABORT) {
+		if (ahd_search_qinfifo(ahd, cmd->device->id, 
+				       cmd->device->channel + 'A',
+				       cmd->device->lun, 
+				       pending_scb->hscb->tag,
+				       ROLE_INITIATOR, CAM_REQ_ABORTED,
+				       SEARCH_COMPLETE) > 0) {
+			printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
+			       ahd_name(ahd), cmd->device->channel, 
+			       cmd->device->id, cmd->device->lun);
+			retval = SUCCESS;
+			goto done;
+		}
+	} else if (ahd_search_qinfifo(ahd, cmd->device->id,
+				      cmd->device->channel + 'A',
+				      cmd->device->lun, pending_scb->hscb->tag,
+				      ROLE_INITIATOR, /*status*/0,
+				      SEARCH_COUNT) > 0) {
+		disconnected = FALSE;
+	}
 
-#ifdef AHD_DEBUG
-			if (ahd_debug & AHD_SHOW_SENSE) {
-				int i;
+	saved_modes = ahd_save_modes(ahd);
+	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
+	last_phase = ahd_inb(ahd, LASTPHASE);
+	saved_scbptr = ahd_get_scbptr(ahd);
+	active_scbptr = saved_scbptr;
+	if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
+		struct scb *bus_scb;
 
-				printf("Copied %d bytes of sense data at %d:",
-				       sense_size, sense_offset);
-				for (i = 0; i < sense_size; i++) {
-					if ((i & 0xF) == 0)
-						printf("\n");
-					printf("0x%x ", cmd->sense_buffer[i]);
-				}
-				printf("\n");
-			}
-#endif
-		}
-		break;
+		bus_scb = ahd_lookup_scb(ahd, active_scbptr);
+		if (bus_scb == pending_scb)
+			disconnected = FALSE;
+		else if (flag != SCB_ABORT
+			 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
+			 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
+			disconnected = FALSE;
 	}
-	case SCSI_STATUS_QUEUE_FULL:
-	{
+
+	/*
+	 * At this point, pending_scb is the scb associated with the
+	 * passed in command.  That command is currently active on the
+	 * bus or is in the disconnected state.
+	 */
+	saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
+	if (last_phase != P_BUSFREE
+	 && (SCB_GET_TAG(pending_scb) == active_scbptr
+	     || (flag == SCB_DEVICE_RESET
+		 && SCSIID_TARGET(ahd, saved_scsiid) == cmd->device->id))) {
+
 		/*
-		 * By the time the core driver has returned this
-		 * command, all other commands that were queued
-		 * to us but not the device have been returned.
-		 * This ensures that dev->active is equal to
-		 * the number of commands actually queued to
-		 * the device.
+		 * We're active on the bus, so assert ATN
+		 * and hope that the target responds.
 		 */
-		dev->tag_success_count = 0;
-		if (dev->active != 0) {
+		pending_scb = ahd_lookup_scb(ahd, active_scbptr);
+		pending_scb->flags |= SCB_RECOVERY_SCB|flag;
+		ahd_outb(ahd, MSG_OUT, HOST_MSG);
+		ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
+		printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
+		       ahd_name(ahd), cmd->device->channel,
+		       cmd->device->id, cmd->device->lun);
+		wait = TRUE;
+	} else if (disconnected) {
+
+		/*
+		 * Actually re-queue this SCB in an attempt
+		 * to select the device before it reconnects.
+		 */
+		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
+		ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
+		pending_scb->hscb->cdb_len = 0;
+		pending_scb->hscb->task_attribute = 0;
+		pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
+
+		if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
 			/*
-			 * Drop our opening count to the number
-			 * of commands currently outstanding.
+			 * Mark the SCB has having an outstanding
+			 * task management function.  Should the command
+			 * complete normally before the task management
+			 * function can be sent, the host will be notified
+			 * to abort our requeued SCB.
 			 */
-			dev->openings = 0;
-#ifdef AHD_DEBUG
-			if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
-				ahd_print_path(ahd, scb);
-				printf("Dropping tag count to %d\n",
-				       dev->active);
-			}
-#endif
-			if (dev->active == dev->tags_on_last_queuefull) {
-
-				dev->last_queuefull_same_count++;
-				/*
-				 * If we repeatedly see a queue full
-				 * at the same queue depth, this
-				 * device has a fixed number of tag
-				 * slots.  Lock in this tag depth
-				 * so we stop seeing queue fulls from
-				 * this device.
-				 */
-				if (dev->last_queuefull_same_count
-				 == AHD_LOCK_TAGS_COUNT) {
-					dev->maxtags = dev->active;
-					ahd_print_path(ahd, scb);
-					printf("Locking max tag count at %d\n",
-					       dev->active);
-				}
-			} else {
-				dev->tags_on_last_queuefull = dev->active;
-				dev->last_queuefull_same_count = 0;
-			}
-			ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
-			ahd_set_scsi_status(scb, SCSI_STATUS_OK);
-			ahd_platform_set_tags(ahd, &devinfo,
-				     (dev->flags & AHD_DEV_Q_BASIC)
-				   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
-			break;
+			ahd_outb(ahd, SCB_TASK_MANAGEMENT,
+				 pending_scb->hscb->task_management);
+		} else {
+			/*
+			 * If non-packetized, set the MK_MESSAGE control
+			 * bit indicating that we desire to send a message.
+			 * We also set the disconnected flag since there is
+			 * no guarantee that our SCB control byte matches
+			 * the version on the card.  We don't want the
+			 * sequencer to abort the command thinking an
+			 * unsolicited reselection occurred.
+			 */
+			pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
+
+			/*
+			 * The sequencer will never re-reference the
+			 * in-core SCB.  To make sure we are notified
+			 * during reslection, set the MK_MESSAGE flag in
+			 * the card's copy of the SCB.
+			 */
+			ahd_outb(ahd, SCB_CONTROL,
+				 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
 		}
+
 		/*
-		 * Drop down to a single opening, and treat this
-		 * as if the target returned BUSY SCSI status.
-		 */
-		dev->openings = 1;
-		ahd_platform_set_tags(ahd, &devinfo,
-			     (dev->flags & AHD_DEV_Q_BASIC)
-			   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
-		ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
-		/* FALLTHROUGH */
-	}
-	case SCSI_STATUS_BUSY:
-		/*
-		 * Set a short timer to defer sending commands for
-		 * a bit since Linux will not delay in this case.
+		 * Clear out any entries in the QINFIFO first
+		 * so we are the next SCB for this target
+		 * to run.
 		 */
-		if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) {
-			printf("%s:%c:%d: Device Timer still active during "
-			       "busy processing\n", ahd_name(ahd),
-				dev->target->channel, dev->target->target);
-			break;
-		}
-		dev->flags |= AHD_DEV_TIMER_ACTIVE;
-		dev->qfrozen++;
-		init_timer(&dev->timer);
-		dev->timer.data = (u_long)dev;
-		dev->timer.expires = jiffies + (HZ/2);
-		dev->timer.function = ahd_linux_dev_timed_unfreeze;
-		add_timer(&dev->timer);
-		break;
+		ahd_search_qinfifo(ahd, cmd->device->id,
+				   cmd->device->channel + 'A', cmd->device->lun,
+				   SCB_LIST_NULL, ROLE_INITIATOR,
+				   CAM_REQUEUE_REQ, SEARCH_COMPLETE);
+		ahd_qinfifo_requeue_tail(ahd, pending_scb);
+		ahd_set_scbptr(ahd, saved_scbptr);
+		ahd_print_path(ahd, pending_scb);
+		printf("Device is disconnected, re-queuing SCB\n");
+		wait = TRUE;
+	} else {
+		printf("%s:%d:%d:%d: Unable to deliver message\n",
+		       ahd_name(ahd), cmd->device->channel,
+		       cmd->device->id, cmd->device->lun);
+		retval = FAILED;
+		goto done;
 	}
-}
-
-static void
-ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd)
-{
-	/*
-	 * Typically, the complete queue has very few entries
-	 * queued to it before the queue is emptied by
-	 * ahd_linux_run_complete_queue, so sorting the entries
-	 * by generation number should be inexpensive.
-	 * We perform the sort so that commands that complete
-	 * with an error are retuned in the order origionally
-	 * queued to the controller so that any subsequent retries
-	 * are performed in order.  The underlying ahd routines do
-	 * not guarantee the order that aborted commands will be
-	 * returned to us.
-	 */
-	struct ahd_completeq *completeq;
-	struct ahd_cmd *list_cmd;
-	struct ahd_cmd *acmd;
 
+no_cmd:
 	/*
-	 * Map CAM error codes into Linux Error codes.  We
-	 * avoid the conversion so that the DV code has the
-	 * full error information available when making
-	 * state change decisions.
+	 * Our assumption is that if we don't have the command, no
+	 * recovery action was required, so we return success.  Again,
+	 * the semantics of the mid-layer recovery engine are not
+	 * well defined, so this may change in time.
 	 */
-	if (AHD_DV_CMD(cmd) == FALSE) {
-		uint32_t status;
-		u_int new_status;
+	retval = SUCCESS;
+done:
+	if (paused)
+		ahd_unpause(ahd);
+	if (wait) {
+		struct timer_list timer;
+		int ret;
 
-		status = ahd_cmd_get_transaction_status(cmd);
-		if (status != CAM_REQ_CMP) {
-			struct ahd_linux_device *dev;
-			struct ahd_devinfo devinfo;
-			cam_status cam_status;
-			uint32_t action;
-			u_int scsi_status;
-
-			dev = ahd_linux_get_device(ahd, cmd->device->channel,
-						   cmd->device->id,
-						   cmd->device->lun,
-						   /*alloc*/FALSE);
-
-			if (dev == NULL)
-				goto no_fallback;
-
-			ahd_compile_devinfo(&devinfo,
-					    ahd->our_id,
-					    dev->target->target, dev->lun,
-					    dev->target->channel == 0 ? 'A':'B',
-					    ROLE_INITIATOR);
-
-			scsi_status = ahd_cmd_get_scsi_status(cmd);
-			cam_status = ahd_cmd_get_transaction_status(cmd);
-			action = aic_error_action(cmd, dev->target->inq_data,
-						  cam_status, scsi_status);
-			if ((action & SSQ_FALLBACK) != 0) {
-
-				/* Update stats */
-				dev->target->errors_detected++;
-				if (dev->target->cmds_since_error == 0)
-					dev->target->cmds_since_error++;
-				else {
-					dev->target->cmds_since_error = 0;
-					ahd_linux_fallback(ahd, &devinfo);
-				}
-			}
-		}
-no_fallback:
-		switch (status) {
-		case CAM_REQ_INPROG:
-		case CAM_REQ_CMP:
-		case CAM_SCSI_STATUS_ERROR:
-			new_status = DID_OK;
-			break;
-		case CAM_REQ_ABORTED:
-			new_status = DID_ABORT;
-			break;
-		case CAM_BUSY:
-			new_status = DID_BUS_BUSY;
-			break;
-		case CAM_REQ_INVALID:
-		case CAM_PATH_INVALID:
-			new_status = DID_BAD_TARGET;
-			break;
-		case CAM_SEL_TIMEOUT:
-			new_status = DID_NO_CONNECT;
-			break;
-		case CAM_SCSI_BUS_RESET:
-		case CAM_BDR_SENT:
-			new_status = DID_RESET;
-			break;
-		case CAM_UNCOR_PARITY:
-			new_status = DID_PARITY;
-			break;
-		case CAM_CMD_TIMEOUT:
-			new_status = DID_TIME_OUT;
-			break;
-		case CAM_UA_ABORT:
-		case CAM_REQ_CMP_ERR:
-		case CAM_AUTOSENSE_FAIL:
-		case CAM_NO_HBA:
-		case CAM_DATA_RUN_ERR:
-		case CAM_UNEXP_BUSFREE:
-		case CAM_SEQUENCE_FAIL:
-		case CAM_CCB_LEN_ERR:
-		case CAM_PROVIDE_FAIL:
-		case CAM_REQ_TERMIO:
-		case CAM_UNREC_HBA_ERROR:
-		case CAM_REQ_TOO_BIG:
-			new_status = DID_ERROR;
-			break;
-		case CAM_REQUEUE_REQ:
-			/*
-			 * If we want the request requeued, make sure there
-			 * are sufficent retries.  In the old scsi error code,
-			 * we used to be able to specify a result code that
-			 * bypassed the retry count.  Now we must use this
-			 * hack.  We also "fake" a check condition with
-			 * a sense code of ABORTED COMMAND.  This seems to
-			 * evoke a retry even if this command is being sent
-			 * via the eh thread.  Ick!  Ick!  Ick!
-			 */
-			if (cmd->retries > 0)
-				cmd->retries--;
-			new_status = DID_OK;
-			ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
-			cmd->result |= (DRIVER_SENSE << 24);
-			memset(cmd->sense_buffer, 0,
-			       sizeof(cmd->sense_buffer));
-			cmd->sense_buffer[0] = SSD_ERRCODE_VALID
-					     | SSD_CURRENT_ERROR;
-			cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
-			break;
-		default:
-			/* We should never get here */
-			new_status = DID_ERROR;
-			break;
+		ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
+		spin_unlock_irq(&ahd->platform_data->spin_lock);
+		init_timer(&timer);
+		timer.data = (u_long)ahd;
+		timer.expires = jiffies + (5 * HZ);
+		timer.function = ahd_linux_sem_timeout;
+		add_timer(&timer);
+		printf("Recovery code sleeping\n");
+		down(&ahd->platform_data->eh_sem);
+		printf("Recovery code awake\n");
+        	ret = del_timer_sync(&timer);
+		if (ret == 0) {
+			printf("Timer Expired\n");
+			retval = FAILED;
 		}
-
-		ahd_cmd_set_transaction_status(cmd, new_status);
+		spin_lock_irq(&ahd->platform_data->spin_lock);
 	}
-
-	completeq = &ahd->platform_data->completeq;
-	list_cmd = TAILQ_FIRST(completeq);
-	acmd = (struct ahd_cmd *)cmd;
-	while (list_cmd != NULL
-	    && acmd_scsi_cmd(list_cmd).serial_number
-	     < acmd_scsi_cmd(acmd).serial_number)
-		list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
-	if (list_cmd != NULL)
-		TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
-	else
-		TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
+	spin_unlock_irq(&ahd->platform_data->spin_lock);
+	return (retval);
 }
 
-static void
-ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
+static void ahd_linux_exit(void);
+
+static void ahd_linux_set_width(struct scsi_target *starget, int width)
 {
-	struct	scsi_inquiry_data *sid;
-	struct	ahd_initiator_tinfo *tinfo;
-	struct	ahd_transinfo *user;
-	struct	ahd_transinfo *goal;
-	struct	ahd_transinfo *curr;
-	struct	ahd_tmode_tstate *tstate;
-	struct	ahd_linux_device *dev;
-	u_int	width;
-	u_int	period;
-	u_int	offset;
-	u_int	ppr_options;
-	u_int	trans_version;
-	u_int	prot_version;
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_devinfo devinfo;
+	unsigned long flags;
 
-	/*
-	 * Determine if this lun actually exists.  If so,
-	 * hold on to its corresponding device structure.
-	 * If not, make sure we release the device and
-	 * don't bother processing the rest of this inquiry
-	 * command.
-	 */
-	dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
-				   devinfo->target, devinfo->lun,
-				   /*alloc*/TRUE);
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	ahd_lock(ahd, &flags);
+	ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
+}
+
+static void ahd_linux_set_period(struct scsi_target *starget, int period)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_tmode_tstate *tstate;
+	struct ahd_initiator_tinfo *tinfo 
+		= ahd_fetch_transinfo(ahd,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahd_devinfo devinfo;
+	unsigned int ppr_options = tinfo->goal.ppr_options;
+	unsigned long flags;
+	unsigned long offset = tinfo->goal.offset;
 
-	sid = (struct scsi_inquiry_data *)dev->target->inq_data;
-	if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
+	if (offset == 0)
+		offset = MAX_OFFSET;
 
-		dev->flags &= ~AHD_DEV_UNCONFIGURED;
-	} else {
-		dev->flags |= AHD_DEV_UNCONFIGURED;
-		return;
+	if (period < 8)
+		period = 8;
+	if (period < 10) {
+		ppr_options |= MSG_EXT_PPR_DT_REQ;
+		if (period == 8)
+			ppr_options |= MSG_EXT_PPR_IU_REQ;
 	}
 
-	/*
-	 * Update our notion of this device's transfer
-	 * negotiation capabilities.
-	 */
-	tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
-				    devinfo->our_scsiid,
-				    devinfo->target, &tstate);
-	user = &tinfo->user;
-	goal = &tinfo->goal;
-	curr = &tinfo->curr;
-	width = user->width;
-	period = user->period;
-	offset = user->offset;
-	ppr_options = user->ppr_options;
-	trans_version = user->transport_version;
-	prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
 
-	/*
-	 * Only attempt SPI3/4 once we've verified that
-	 * the device claims to support SPI3/4 features.
-	 */
-	if (prot_version < SCSI_REV_2)
-		trans_version = SID_ANSI_REV(sid);
-	else
-		trans_version = SCSI_REV_2;
-
-	if ((sid->flags & SID_WBus16) == 0)
-		width = MSG_EXT_WDTR_BUS_8_BIT;
-	if ((sid->flags & SID_Sync) == 0) {
-		period = 0;
-		offset = 0;
-		ppr_options = 0;
+	/* all PPR requests apart from QAS require wide transfers */
+	if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
+		if (spi_width(starget) == 0)
+			ppr_options &= MSG_EXT_PPR_QAS_REQ;
 	}
-	if ((sid->spi3data & SID_SPI_QAS) == 0)
-		ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
-	if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
-		ppr_options &= MSG_EXT_PPR_QAS_REQ;
-	if ((sid->spi3data & SID_SPI_IUS) == 0)
-		ppr_options &= (MSG_EXT_PPR_DT_REQ
-			      | MSG_EXT_PPR_QAS_REQ);
-
-	if (prot_version > SCSI_REV_2
-	 && ppr_options != 0)
-		trans_version = user->transport_version;
-
-	ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN);
+
 	ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
-	ahd_validate_offset(ahd, /*tinfo limit*/NULL, period,
-			    &offset, width, ROLE_UNKNOWN);
-	if (offset == 0 || period == 0) {
-		period = 0;
-		offset = 0;
-		ppr_options = 0;
-	}
-	/* Apply our filtered user settings. */
-	curr->transport_version = trans_version;
-	curr->protocol_version = prot_version;
-	ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE);
-	ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options,
-			 AHD_TRANS_GOAL, /*paused*/FALSE);
+	ahd_lock(ahd, &flags);
+	ahd_set_syncrate(ahd, &devinfo, period, offset,
+			 ppr_options, AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
 }
 
-void
-ahd_freeze_simq(struct ahd_softc *ahd)
+static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
 {
-	ahd->platform_data->qfrozen++;
-	if (ahd->platform_data->qfrozen == 1) {
-		scsi_block_requests(ahd->platform_data->host);
-		ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
-					CAM_LUN_WILDCARD, SCB_LIST_NULL,
-					ROLE_INITIATOR, CAM_REQUEUE_REQ);
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_tmode_tstate *tstate;
+	struct ahd_initiator_tinfo *tinfo 
+		= ahd_fetch_transinfo(ahd,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahd_devinfo devinfo;
+	unsigned int ppr_options = 0;
+	unsigned int period = 0;
+	unsigned long flags;
+
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	if (offset != 0) {
+		period = tinfo->goal.period;
+		ppr_options = tinfo->goal.ppr_options;
+		ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
 	}
+	ahd_lock(ahd, &flags);
+	ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
+			 AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
 }
 
-void
-ahd_release_simq(struct ahd_softc *ahd)
+static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
 {
-	u_long s;
-	int    unblock_reqs;
-
-	unblock_reqs = 0;
-	ahd_lock(ahd, &s);
-	if (ahd->platform_data->qfrozen > 0)
-		ahd->platform_data->qfrozen--;
-	if (ahd->platform_data->qfrozen == 0) {
-		unblock_reqs = 1;
-	}
-	if (AHD_DV_SIMQ_FROZEN(ahd)
-	 && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) {
-		ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
-		up(&ahd->platform_data->dv_sem);
-	}
-	ahd_unlock(ahd, &s);
-	/*
-	 * There is still a race here.  The mid-layer
-	 * should keep its own freeze count and use
-	 * a bottom half handler to run the queues
-	 * so we can unblock with our own lock held.
-	 */
-	if (unblock_reqs)
-		scsi_unblock_requests(ahd->platform_data->host);
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_tmode_tstate *tstate;
+	struct ahd_initiator_tinfo *tinfo 
+		= ahd_fetch_transinfo(ahd,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahd_devinfo devinfo;
+	unsigned int ppr_options = tinfo->goal.ppr_options
+		& ~MSG_EXT_PPR_DT_REQ;
+	unsigned int period = tinfo->goal.period;
+	unsigned long flags;
+
+	if (dt) {
+		ppr_options |= MSG_EXT_PPR_DT_REQ;
+		if (period > 9)
+			period = 9; /* at least 12.5ns for DT */
+	} else if (period <= 9)
+		period = 10; /* If resetting DT, period must be >= 25ns */
+
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	ahd_find_syncrate(ahd, &period, &ppr_options,
+			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+	ahd_lock(ahd, &flags);
+	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+			 ppr_options, AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
 }
 
-static void
-ahd_linux_sem_timeout(u_long arg)
+static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
 {
-	struct	scb *scb;
-	struct	ahd_softc *ahd;
-	u_long	s;
-
-	scb = (struct scb *)arg;
-	ahd = scb->ahd_softc;
-	ahd_lock(ahd, &s);
-	if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
-		scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
-		up(&ahd->platform_data->eh_sem);
-	}
-	ahd_unlock(ahd, &s);
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_tmode_tstate *tstate;
+	struct ahd_initiator_tinfo *tinfo 
+		= ahd_fetch_transinfo(ahd,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahd_devinfo devinfo;
+	unsigned int ppr_options = tinfo->goal.ppr_options
+		& ~MSG_EXT_PPR_QAS_REQ;
+	unsigned int period = tinfo->goal.period;
+	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+	unsigned long flags;
+
+	if (qas)
+		ppr_options |= MSG_EXT_PPR_QAS_REQ;
+
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	ahd_find_syncrate(ahd, &period, &ppr_options,
+			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+	ahd_lock(ahd, &flags);
+	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+			 ppr_options, AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
 }
 
-static void
-ahd_linux_dev_timed_unfreeze(u_long arg)
+static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
 {
-	struct ahd_linux_device *dev;
-	struct ahd_softc *ahd;
-	u_long s;
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_tmode_tstate *tstate;
+	struct ahd_initiator_tinfo *tinfo 
+		= ahd_fetch_transinfo(ahd,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahd_devinfo devinfo;
+	unsigned int ppr_options = tinfo->goal.ppr_options
+		& ~MSG_EXT_PPR_IU_REQ;
+	unsigned int period = tinfo->goal.period;
+	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+	unsigned long flags;
+
+	if (iu)
+		ppr_options |= MSG_EXT_PPR_IU_REQ;
+
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	ahd_find_syncrate(ahd, &period, &ppr_options,
+			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+	ahd_lock(ahd, &flags);
+	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+			 ppr_options, AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
+}
 
-	dev = (struct ahd_linux_device *)arg;
-	ahd = dev->target->ahd;
-	ahd_lock(ahd, &s);
-	dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
-	if (dev->qfrozen > 0)
-		dev->qfrozen--;
-	if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
-	 && dev->active == 0)
-		ahd_linux_free_device(ahd, dev);
-	ahd_unlock(ahd, &s);
+static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+	struct ahd_tmode_tstate *tstate;
+	struct ahd_initiator_tinfo *tinfo 
+		= ahd_fetch_transinfo(ahd,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahd_devinfo devinfo;
+	unsigned int ppr_options = tinfo->goal.ppr_options
+		& ~MSG_EXT_PPR_RD_STRM;
+	unsigned int period = tinfo->goal.period;
+	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+	unsigned long flags;
+
+	if (rdstrm)
+		ppr_options |= MSG_EXT_PPR_RD_STRM;
+
+	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	ahd_find_syncrate(ahd, &period, &ppr_options,
+			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+	ahd_lock(ahd, &flags);
+	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+			 ppr_options, AHD_TRANS_GOAL, FALSE);
+	ahd_unlock(ahd, &flags);
 }
 
+static struct spi_function_template ahd_linux_transport_functions = {
+	.set_offset	= ahd_linux_set_offset,
+	.show_offset	= 1,
+	.set_period	= ahd_linux_set_period,
+	.show_period	= 1,
+	.set_width	= ahd_linux_set_width,
+	.show_width	= 1,
+	.set_dt		= ahd_linux_set_dt,
+	.show_dt	= 1,
+	.set_iu		= ahd_linux_set_iu,
+	.show_iu	= 1,
+	.set_qas	= ahd_linux_set_qas,
+	.show_qas	= 1,
+	.set_rd_strm	= ahd_linux_set_rd_strm,
+	.show_rd_strm	= 1,
+};
+
+
+
 static int __init
 ahd_linux_init(void)
 {
-	return ahd_linux_detect(&aic79xx_driver_template);
+	ahd_linux_transport_template = spi_attach_transport(&ahd_linux_transport_functions);
+	if (!ahd_linux_transport_template)
+		return -ENODEV;
+	scsi_transport_reserve_target(ahd_linux_transport_template,
+				      sizeof(struct ahd_linux_target));
+	scsi_transport_reserve_device(ahd_linux_transport_template,
+				      sizeof(struct ahd_linux_device));
+	if (ahd_linux_detect(&aic79xx_driver_template) > 0)
+		return 0;
+	spi_release_transport(ahd_linux_transport_template);
+	ahd_linux_exit();
+	return -ENODEV;
 }
 
 static void __exit
 ahd_linux_exit(void)
 {
-	struct ahd_softc *ahd;
-
-	/*
-	 * Shutdown DV threads before going into the SCSI mid-layer.
-	 * This avoids situations where the mid-layer locks the entire
-	 * kernel so that waiting for our DV threads to exit leads
-	 * to deadlock.
-	 */
-	TAILQ_FOREACH(ahd, &ahd_tailq, links) {
-
-		ahd_linux_kill_dv_thread(ahd);
-	}
-
 	ahd_linux_pci_exit();
+	spi_release_transport(ahd_linux_transport_template);
 }
 
 module_init(ahd_linux_init);

drivers/scsi/aic7xxx/aic79xx_osm.h

@@ -42,6 +42,7 @@
 #ifndef _AIC79XX_LINUX_H_
 #define _AIC79XX_LINUX_H_
 
+#include <linux/config.h>
 #include <linux/types.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
@@ -49,18 +50,23 @@
 #include <linux/pci.h>
 #include <linux/smp_lock.h>
 #include <linux/version.h>
+#include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <asm/byteorder.h>
 #include <asm/io.h>
 
-#include <linux/interrupt.h> /* For tasklet support. */
-#include <linux/config.h>
-#include <linux/slab.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_spi.h>
 
 /* Core SCSI definitions */
 #define AIC_LIB_PREFIX ahd
-#include "scsi.h"
-#include <scsi/scsi_host.h>
 
 /* Name space conflict with BSD queue macros */
 #ifdef LIST_HEAD
@@ -95,7 +101,7 @@
 /************************* Forward Declarations *******************************/
 struct ahd_softc;
 typedef struct pci_dev *ahd_dev_softc_t;
-typedef Scsi_Cmnd      *ahd_io_ctx_t;
+typedef struct scsi_cmnd      *ahd_io_ctx_t;
 
 /******************************* Byte Order ***********************************/
 #define ahd_htobe16(x)	cpu_to_be16(x)
@@ -115,7 +121,7 @@ typedef Scsi_Cmnd      *ahd_io_ctx_t;
 /************************* Configuration Data *********************************/
 extern uint32_t aic79xx_allow_memio;
 extern int aic79xx_detect_complete;
-extern Scsi_Host_Template aic79xx_driver_template;
+extern struct scsi_host_template aic79xx_driver_template;
 
 /***************************** Bus Space/DMA **********************************/
 
@@ -145,11 +151,7 @@ struct ahd_linux_dma_tag
 };
 typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
 
-struct ahd_linux_dmamap
-{
-	dma_addr_t	bus_addr;
-};
-typedef struct ahd_linux_dmamap* bus_dmamap_t;
+typedef dma_addr_t bus_dmamap_t;
 
 typedef int bus_dma_filter_t(void*, dma_addr_t);
 typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
@@ -226,12 +228,12 @@ typedef struct timer_list ahd_timer_t;
 #define ahd_timer_init init_timer
 #define ahd_timer_stop del_timer_sync
 typedef void ahd_linux_callback_t (u_long);  
-static __inline void ahd_timer_reset(ahd_timer_t *timer, u_int usec,
+static __inline void ahd_timer_reset(ahd_timer_t *timer, int usec,
 				     ahd_callback_t *func, void *arg);
 static __inline void ahd_scb_timer_reset(struct scb *scb, u_int usec);
 
 static __inline void
-ahd_timer_reset(ahd_timer_t *timer, u_int usec, ahd_callback_t *func, void *arg)
+ahd_timer_reset(ahd_timer_t *timer, int usec, ahd_callback_t *func, void *arg)
 {
 	struct ahd_softc *ahd;
 
@@ -382,62 +384,12 @@ struct ahd_linux_device {
 	 */
 	u_int			commands_since_idle_or_otag;
 #define AHD_OTAG_THRESH	500
-
-	int			lun;
-	Scsi_Device	       *scsi_device;
-	struct			ahd_linux_target *target;
 };
 
-typedef enum {
-	AHD_DV_REQUIRED		 = 0x01,
-	AHD_INQ_VALID		 = 0x02,
-	AHD_BASIC_DV		 = 0x04,
-	AHD_ENHANCED_DV		 = 0x08
-} ahd_linux_targ_flags;
-
-/* DV States */
-typedef enum {
-	AHD_DV_STATE_EXIT = 0,
-	AHD_DV_STATE_INQ_SHORT_ASYNC,
-	AHD_DV_STATE_INQ_ASYNC,
-	AHD_DV_STATE_INQ_ASYNC_VERIFY,
-	AHD_DV_STATE_TUR,
-	AHD_DV_STATE_REBD,
-	AHD_DV_STATE_INQ_VERIFY,
-	AHD_DV_STATE_WEB,
-	AHD_DV_STATE_REB,
-	AHD_DV_STATE_SU,
-	AHD_DV_STATE_BUSY
-} ahd_dv_state;
-
 struct ahd_linux_target {
-	struct ahd_linux_device	 *devices[AHD_NUM_LUNS];
-	int			  channel;
-	int			  target;
-	int			  refcount;
+	struct scsi_device	 *sdev[AHD_NUM_LUNS];
 	struct ahd_transinfo	  last_tinfo;
 	struct ahd_softc	 *ahd;
-	ahd_linux_targ_flags	  flags;
-	struct scsi_inquiry_data *inq_data;
-	/*
-	 * The next "fallback" period to use for narrow/wide transfers.
-	 */
-	uint8_t			  dv_next_narrow_period;
-	uint8_t			  dv_next_wide_period;
-	uint8_t			  dv_max_width;
-	uint8_t			  dv_max_ppr_options;
-	uint8_t			  dv_last_ppr_options;
-	u_int			  dv_echo_size;
-	ahd_dv_state		  dv_state;
-	u_int			  dv_state_retry;
-	uint8_t			 *dv_buffer;
-	uint8_t			 *dv_buffer1;
-
-	/*
-	 * Cumulative counter of errors.
-	 */
-	u_long			errors_detected;
-	u_long			cmds_since_error;
 };
 
 /********************* Definitions Required by the Core ***********************/
@@ -452,16 +404,11 @@ struct ahd_linux_target {
 /*
  * Per-SCB OSM storage.
  */
-typedef enum {
-	AHD_SCB_UP_EH_SEM = 0x1
-} ahd_linux_scb_flags;
-
 struct scb_platform_data {
 	struct ahd_linux_device	*dev;
 	dma_addr_t		 buf_busaddr;
 	uint32_t		 xfer_len;
 	uint32_t		 sense_resid;	/* Auto-Sense residual */
-	ahd_linux_scb_flags	 flags;
 };
 
 /*
@@ -470,42 +417,24 @@ struct scb_platform_data {
  * alignment restrictions of the various platforms supported by
  * this driver.
  */
-typedef enum {
-	AHD_DV_WAIT_SIMQ_EMPTY	 = 0x01,
-	AHD_DV_WAIT_SIMQ_RELEASE = 0x02,
-	AHD_DV_ACTIVE		 = 0x04,
-	AHD_DV_SHUTDOWN		 = 0x08,
-	AHD_RUN_CMPLT_Q_TIMER	 = 0x10
-} ahd_linux_softc_flags;
-
-TAILQ_HEAD(ahd_completeq, ahd_cmd);
-
 struct ahd_platform_data {
 	/*
 	 * Fields accessed from interrupt context.
 	 */
-	struct ahd_linux_target *targets[AHD_NUM_TARGETS]; 
-	struct ahd_completeq	 completeq;
+	struct scsi_target *starget[AHD_NUM_TARGETS]; 
 
 	spinlock_t		 spin_lock;
 	u_int			 qfrozen;
-	pid_t			 dv_pid;
-	struct timer_list	 completeq_timer;
 	struct timer_list	 reset_timer;
-	struct timer_list	 stats_timer;
 	struct semaphore	 eh_sem;
-	struct semaphore	 dv_sem;
-	struct semaphore	 dv_cmd_sem;	/* XXX This needs to be in
-						 * the target struct
-						 */
-	struct scsi_device	*dv_scsi_dev;
 	struct Scsi_Host        *host;		/* pointer to scsi host */
 #define AHD_LINUX_NOIRQ	((uint32_t)~0)
 	uint32_t		 irq;		/* IRQ for this adapter */
 	uint32_t		 bios_address;
 	uint32_t		 mem_busaddr;	/* Mem Base Addr */
 	uint64_t		 hw_dma_mask;
-	ahd_linux_softc_flags	 flags;
+#define	AHD_SCB_UP_EH_SEM 0x1
+	uint32_t		 flags;
 };
 
 /************************** OS Utility Wrappers *******************************/
@@ -622,7 +551,7 @@ ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 
 /**************************** Initialization **********************************/
 int		ahd_linux_register_host(struct ahd_softc *,
-					Scsi_Host_Template *);
+					struct scsi_host_template *);
 
 uint64_t	ahd_linux_get_memsize(void);
 
@@ -643,17 +572,6 @@ static __inline void ahd_lockinit(struct ahd_softc *);
 static __inline void ahd_lock(struct ahd_softc *, unsigned long *flags);
 static __inline void ahd_unlock(struct ahd_softc *, unsigned long *flags);
 
-/* Lock acquisition and release of the above lock in midlayer entry points. */
-static __inline void ahd_midlayer_entrypoint_lock(struct ahd_softc *,
-						  unsigned long *flags);
-static __inline void ahd_midlayer_entrypoint_unlock(struct ahd_softc *,
-						    unsigned long *flags);
-
-/* Lock held during command compeletion to the upper layer */
-static __inline void ahd_done_lockinit(struct ahd_softc *);
-static __inline void ahd_done_lock(struct ahd_softc *, unsigned long *flags);
-static __inline void ahd_done_unlock(struct ahd_softc *, unsigned long *flags);
-
 /* Lock held during ahd_list manipulation and ahd softc frees */
 extern spinlock_t ahd_list_spinlock;
 static __inline void ahd_list_lockinit(void);
@@ -678,57 +596,6 @@ ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
 	spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
 }
 
-static __inline void
-ahd_midlayer_entrypoint_lock(struct ahd_softc *ahd, unsigned long *flags)
-{
-	/*
-	 * In 2.5.X and some 2.4.X versions, the midlayer takes our
-	 * lock just before calling us, so we avoid locking again.
-	 * For other kernel versions, the io_request_lock is taken
-	 * just before our entry point is called.  In this case, we
-	 * trade the io_request_lock for our per-softc lock.
-	 */
-#if AHD_SCSI_HAS_HOST_LOCK == 0
-	spin_unlock(&io_request_lock);
-	spin_lock(&ahd->platform_data->spin_lock);
-#endif
-}
-
-static __inline void
-ahd_midlayer_entrypoint_unlock(struct ahd_softc *ahd, unsigned long *flags)
-{
-#if AHD_SCSI_HAS_HOST_LOCK == 0
-	spin_unlock(&ahd->platform_data->spin_lock);
-	spin_lock(&io_request_lock);
-#endif
-}
-
-static __inline void
-ahd_done_lockinit(struct ahd_softc *ahd)
-{
-	/*
-	 * In 2.5.X, our own lock is held during completions.
-	 * In previous versions, the io_request_lock is used.
-	 * In either case, we can't initialize this lock again.
-	 */
-}
-
-static __inline void
-ahd_done_lock(struct ahd_softc *ahd, unsigned long *flags)
-{
-#if AHD_SCSI_HAS_HOST_LOCK == 0
-	spin_lock(&io_request_lock);
-#endif
-}
-
-static __inline void
-ahd_done_unlock(struct ahd_softc *ahd, unsigned long *flags)
-{
-#if AHD_SCSI_HAS_HOST_LOCK == 0
-	spin_unlock(&io_request_lock);
-#endif
-}
-
 static __inline void
 ahd_list_lockinit(void)
 {
@@ -909,20 +776,14 @@ ahd_flush_device_writes(struct ahd_softc *ahd)
 int	ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
 			    off_t, int, int);
 
-/*************************** Domain Validation ********************************/
-#define AHD_DV_CMD(cmd) ((cmd)->scsi_done == ahd_linux_dv_complete)
-#define AHD_DV_SIMQ_FROZEN(ahd)					\
-	((((ahd)->platform_data->flags & AHD_DV_ACTIVE) != 0)	\
-	 && (ahd)->platform_data->qfrozen == 1)
-
 /*********************** Transaction Access Wrappers **************************/
-static __inline void ahd_cmd_set_transaction_status(Scsi_Cmnd *, uint32_t);
+static __inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
-static __inline void ahd_cmd_set_scsi_status(Scsi_Cmnd *, uint32_t);
+static __inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
-static __inline uint32_t ahd_cmd_get_transaction_status(Scsi_Cmnd *cmd);
+static __inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 static __inline uint32_t ahd_get_transaction_status(struct scb *);
-static __inline uint32_t ahd_cmd_get_scsi_status(Scsi_Cmnd *cmd);
+static __inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 static __inline uint32_t ahd_get_scsi_status(struct scb *);
 static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
 static __inline u_long ahd_get_transfer_length(struct scb *);
@@ -941,7 +802,7 @@ static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
 static __inline void ahd_freeze_scb(struct scb *scb);
 
 static __inline
-void ahd_cmd_set_transaction_status(Scsi_Cmnd *cmd, uint32_t status)
+void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 {
 	cmd->result &= ~(CAM_STATUS_MASK << 16);
 	cmd->result |= status << 16;
@@ -954,7 +815,7 @@ void ahd_set_transaction_status(struct scb *scb, uint32_t status)
 }
 
 static __inline
-void ahd_cmd_set_scsi_status(Scsi_Cmnd *cmd, uint32_t status)
+void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 {
 	cmd->result &= ~0xFFFF;
 	cmd->result |= status;
@@ -967,7 +828,7 @@ void ahd_set_scsi_status(struct scb *scb, uint32_t status)
 }
 
 static __inline
-uint32_t ahd_cmd_get_transaction_status(Scsi_Cmnd *cmd)
+uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 {
 	return ((cmd->result >> 16) & CAM_STATUS_MASK);
 }
@@ -979,7 +840,7 @@ uint32_t ahd_get_transaction_status(struct scb *scb)
 }
 
 static __inline
-uint32_t ahd_cmd_get_scsi_status(Scsi_Cmnd *cmd)
+uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 {
 	return (cmd->result & 0xFFFF);
 }

drivers/scsi/aic7xxx/aic79xx_proc.c

@@ -49,7 +49,7 @@ static void	ahd_dump_target_state(struct ahd_softc *ahd,
 				      u_int our_id, char channel,
 				      u_int target_id, u_int target_offset);
 static void	ahd_dump_device_state(struct info_str *info,
-				      struct ahd_linux_device *dev);
+				      struct scsi_device *sdev);
 static int	ahd_proc_write_seeprom(struct ahd_softc *ahd,
 				       char *buffer, int length);
 
@@ -167,6 +167,7 @@ ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
 		      u_int target_offset)
 {
 	struct	ahd_linux_target *targ;
+	struct  scsi_target *starget;
 	struct	ahd_initiator_tinfo *tinfo;
 	struct	ahd_tmode_tstate *tstate;
 	int	lun;
@@ -176,7 +177,8 @@ ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
 	copy_info(info, "Target %d Negotiation Settings\n", target_id);
 	copy_info(info, "\tUser: ");
 	ahd_format_transinfo(info, &tinfo->user);
-	targ = ahd->platform_data->targets[target_offset];
+	starget = ahd->platform_data->starget[target_offset];
+	targ = scsi_transport_target_data(starget);
 	if (targ == NULL)
 		return;
 
@@ -184,12 +186,11 @@ ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
 	ahd_format_transinfo(info, &tinfo->goal);
 	copy_info(info, "\tCurr: ");
 	ahd_format_transinfo(info, &tinfo->curr);
-	copy_info(info, "\tTransmission Errors %ld\n", targ->errors_detected);
 
 	for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
-		struct ahd_linux_device *dev;
+		struct scsi_device *dev;
 
-		dev = targ->devices[lun];
+		dev = targ->sdev[lun];
 
 		if (dev == NULL)
 			continue;
@@ -199,10 +200,13 @@ ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
 }
 
 static void
-ahd_dump_device_state(struct info_str *info, struct ahd_linux_device *dev)
+ahd_dump_device_state(struct info_str *info, struct scsi_device *sdev)
 {
+	struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
+
 	copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
-		  dev->target->channel + 'A', dev->target->target, dev->lun);
+		  sdev->sdev_target->channel + 'A',
+		  sdev->sdev_target->id, sdev->lun);
 
 	copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
 	copy_info(info, "\t\tCommands Active %d\n", dev->active);