Automatic merge of rsync://www.parisc-linux.org/~jejb/git/scsi-for-linus-2.6.git

7 files changed, 524 insertions, 1310 deletions

diff --git a/drivers/scsi/aic7xxx/aic7770_osm.c b/drivers/scsi/aic7xxx/aic7770_osm.c
index c2b47f2bdff..682ca0b32b4 100644
--- a/drivers/scsi/aic7xxx/aic7770_osm.c
+++ b/drivers/scsi/aic7xxx/aic7770_osm.c
@@ -41,7 +41,6 @@
 
 #include "aic7xxx_osm.h"
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 #include <linux/device.h>
 #include <linux/eisa.h>
 
@@ -62,13 +61,6 @@ static struct eisa_driver aic7770_driver = {
 };
 
 typedef  struct device *aic7770_dev_t;
-#else
-#define MINSLOT			1
-#define NUMSLOTS		16
-#define IDOFFSET		0x80
-
-typedef void *aic7770_dev_t;
-#endif
 
 static int aic7770_linux_config(struct aic7770_identity *entry,
 				aic7770_dev_t dev, u_int eisaBase);
@@ -76,7 +68,6 @@ static int aic7770_linux_config(struct aic7770_identity *entry,
 int
 ahc_linux_eisa_init(void)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 	struct eisa_device_id *eid;
 	struct aic7770_identity *id;
 	int i;
@@ -110,44 +101,6 @@ ahc_linux_eisa_init(void)
 	eid->sig[0] = 0;
 
 	return eisa_driver_register(&aic7770_driver);
-#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) */
-	struct aic7770_identity *entry;
-	u_int  slot;
-	u_int  eisaBase;
-	u_int  i;
-	int ret = -ENODEV;
-
-	if (aic7xxx_probe_eisa_vl == 0)
-		return ret;
-
-	eisaBase = 0x1000 + AHC_EISA_SLOT_OFFSET;
-	for (slot = 1; slot < NUMSLOTS; eisaBase+=0x1000, slot++) {
-		uint32_t eisa_id;
-		size_t	 id_size;
-
-		if (request_region(eisaBase, AHC_EISA_IOSIZE, "aic7xxx") == 0)
-			continue;
-
-		eisa_id = 0;
-		id_size = sizeof(eisa_id);
-		for (i = 0; i < 4; i++) {
-			/* VLcards require priming*/
-			outb(0x80 + i, eisaBase + IDOFFSET);
-			eisa_id |= inb(eisaBase + IDOFFSET + i)
-				   << ((id_size-i-1) * 8);
-		}
-		release_region(eisaBase, AHC_EISA_IOSIZE);
-		if (eisa_id & 0x80000000)
-			continue;  /* no EISA card in slot */
-
-		entry = aic7770_find_device(eisa_id);
-		if (entry != NULL) {
-			aic7770_linux_config(entry, NULL, eisaBase);
-			ret = 0;
-		}
-	}
-	return ret;
-#endif
 }
 
 void
@@ -187,11 +140,10 @@ aic7770_linux_config(struct aic7770_identity *entry, aic7770_dev_t dev,
 		ahc_free(ahc);
 		return (error);
 	}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+
 	dev->driver_data = (void *)ahc;
 	if (aic7xxx_detect_complete)
 		error = ahc_linux_register_host(ahc, &aic7xxx_driver_template);
-#endif
 	return (error);
 }
 
@@ -225,7 +177,6 @@ aic7770_map_int(struct ahc_softc *ahc, u_int irq)
 	return (-error);
 }
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 static int
 aic7770_eisa_dev_probe(struct device *dev)
 {
@@ -261,4 +212,3 @@ aic7770_eisa_dev_remove(struct device *dev)
 
 	return (0);
 }
-#endif
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index d978e4a3e97..f90efa265ba 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -134,11 +134,6 @@ static struct scsi_transport_template *ahc_linux_transport_template = NULL;
 #include "aiclib.c"
 
 #include <linux/init.h>		/* __setup */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-#include "sd.h"			/* For geometry detection */
-#endif
-
 #include <linux/mm.h>		/* For fetching system memory size */
 #include <linux/blkdev.h>		/* For block_size() */
 #include <linux/delay.h>	/* For ssleep/msleep */
@@ -148,11 +143,6 @@ static struct scsi_transport_template *ahc_linux_transport_template = NULL;
  */
 spinlock_t ahc_list_spinlock;
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/* For dynamic sglist size calculation. */
-u_int ahc_linux_nseg;
-#endif
-
 /*
  * Set this to the delay in seconds after SCSI bus reset.
  * Note, we honor this only for the initial bus reset.
@@ -436,15 +426,12 @@ static void ahc_linux_handle_scsi_status(struct ahc_softc *,
 					 struct ahc_linux_device *,
 					 struct scb *);
 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
-					 Scsi_Cmnd *cmd);
+					 struct scsi_cmnd *cmd);
 static void ahc_linux_sem_timeout(u_long arg);
 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
 static void ahc_linux_release_simq(u_long arg);
-static void ahc_linux_dev_timed_unfreeze(u_long arg);
-static int  ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag);
+static int  ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
-static void ahc_linux_size_nseg(void);
-static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
 				     struct ahc_devinfo *devinfo);
 static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
@@ -458,54 +445,27 @@ static struct ahc_linux_device*	ahc_linux_alloc_device(struct ahc_softc*,
 						       u_int);
 static void			ahc_linux_free_device(struct ahc_softc*,
 						      struct ahc_linux_device*);
-static void ahc_linux_run_device_queue(struct ahc_softc*,
-				       struct ahc_linux_device*);
+static int ahc_linux_run_command(struct ahc_softc*,
+				 struct ahc_linux_device *,
+				 struct scsi_cmnd *);
 static void ahc_linux_setup_tag_info_global(char *p);
 static aic_option_callback_t ahc_linux_setup_tag_info;
 static int  aic7xxx_setup(char *s);
 static int  ahc_linux_next_unit(void);
-static void ahc_runq_tasklet(unsigned long data);
-static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
 
 /********************************* Inlines ************************************/
-static __inline void ahc_schedule_runq(struct ahc_softc *ahc);
 static __inline struct ahc_linux_device*
 		     ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
-					  u_int target, u_int lun, int alloc);
-static __inline void ahc_schedule_completeq(struct ahc_softc *ahc);
-static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc,
-						  struct ahc_linux_device *dev);
-static __inline struct ahc_linux_device *
-		     ahc_linux_next_device_to_run(struct ahc_softc *ahc);
-static __inline void ahc_linux_run_device_queues(struct ahc_softc *ahc);
+					  u_int target, u_int lun);
 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
 
 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
 		 		      struct ahc_dma_seg *sg,
 				      dma_addr_t addr, bus_size_t len);
 
-static __inline void
-ahc_schedule_completeq(struct ahc_softc *ahc)
-{
-	if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
-		ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
-		ahc->platform_data->completeq_timer.expires = jiffies;
-		add_timer(&ahc->platform_data->completeq_timer);
-	}
-}
-
-/*
- * Must be called with our lock held.
- */
-static __inline void
-ahc_schedule_runq(struct ahc_softc *ahc)
-{
-	tasklet_schedule(&ahc->platform_data->runq_tasklet);
-}
-
 static __inline struct ahc_linux_device*
 ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
-		     u_int lun, int alloc)
+		     u_int lun)
 {
 	struct ahc_linux_target *targ;
 	struct ahc_linux_device *dev;
@@ -515,102 +475,15 @@ ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
 	if (channel != 0)
 		target_offset += 8;
 	targ = ahc->platform_data->targets[target_offset];
-	if (targ == NULL) {
-		if (alloc != 0) {
-			targ = ahc_linux_alloc_target(ahc, channel, target);
-			if (targ == NULL)
-				return (NULL);
-		} else
-			return (NULL);
-	}
+	BUG_ON(targ == NULL);
 	dev = targ->devices[lun];
-	if (dev == NULL && alloc != 0)
-		dev = ahc_linux_alloc_device(ahc, targ, lun);
-	return (dev);
-}
-
-#define AHC_LINUX_MAX_RETURNED_ERRORS 4
-static struct ahc_cmd *
-ahc_linux_run_complete_queue(struct ahc_softc *ahc)
-{
-	struct	ahc_cmd *acmd;
-	u_long	done_flags;
-	int	with_errors;
-
-	with_errors = 0;
-	ahc_done_lock(ahc, &done_flags);
-	while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
-		Scsi_Cmnd *cmd;
-
-		if (with_errors > AHC_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"
-			 */
-			ahc_schedule_completeq(ahc);
-			break;
-		}
-		TAILQ_REMOVE(&ahc->platform_data->completeq,
-			     acmd, acmd_links.tqe);
-		cmd = &acmd_scsi_cmd(acmd);
-		cmd->host_scribble = NULL;
-		if (ahc_cmd_get_transaction_status(cmd) != DID_OK
-		 || (cmd->result & 0xFF) != SCSI_STATUS_OK)
-			with_errors++;
-
-		cmd->scsi_done(cmd);
-	}
-	ahc_done_unlock(ahc, &done_flags);
-	return (acmd);
-}
-
-static __inline void
-ahc_linux_check_device_queue(struct ahc_softc *ahc,
-			     struct ahc_linux_device *dev)
-{
-	if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) != 0
-	 && dev->active == 0) {
-		dev->flags &= ~AHC_DEV_FREEZE_TIL_EMPTY;
-		dev->qfrozen--;
-	}
-
-	if (TAILQ_FIRST(&dev->busyq) == NULL
-	 || dev->openings == 0 || dev->qfrozen != 0)
-		return;
-
-	ahc_linux_run_device_queue(ahc, dev);
-}
-
-static __inline struct ahc_linux_device *
-ahc_linux_next_device_to_run(struct ahc_softc *ahc)
-{
-	
-	if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0
-	    || (ahc->platform_data->qfrozen != 0))
-		return (NULL);
-	return (TAILQ_FIRST(&ahc->platform_data->device_runq));
-}
-
-static __inline void
-ahc_linux_run_device_queues(struct ahc_softc *ahc)
-{
-	struct ahc_linux_device *dev;
-
-	while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
-		TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
-		dev->flags &= ~AHC_DEV_ON_RUN_LIST;
-		ahc_linux_check_device_queue(ahc, dev);
-	}
+	return dev;
 }
 
 static __inline void
 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
 {
-	Scsi_Cmnd *cmd;
+	struct scsi_cmnd *cmd;
 
 	cmd = scb->io_ctx;
 	ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
@@ -650,109 +523,15 @@ ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
 	return (consumed);
 }
 
-/************************  Host template entry points *************************/
-static int	   ahc_linux_detect(Scsi_Host_Template *);
-static int	   ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
-static const char *ahc_linux_info(struct Scsi_Host *);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
-static int	   ahc_linux_slave_alloc(Scsi_Device *);
-static int	   ahc_linux_slave_configure(Scsi_Device *);
-static void	   ahc_linux_slave_destroy(Scsi_Device *);
-#if defined(__i386__)
-static int	   ahc_linux_biosparam(struct scsi_device*,
-				       struct block_device*,
-				       sector_t, int[]);
-#endif
-#else
-static int	   ahc_linux_release(struct Scsi_Host *);
-static void	   ahc_linux_select_queue_depth(struct Scsi_Host *host,
-						Scsi_Device *scsi_devs);
-#if defined(__i386__)
-static int	   ahc_linux_biosparam(Disk *, kdev_t, int[]);
-#endif
-#endif
-static int	   ahc_linux_bus_reset(Scsi_Cmnd *);
-static int	   ahc_linux_dev_reset(Scsi_Cmnd *);
-static int	   ahc_linux_abort(Scsi_Cmnd *);
-
-/*
- * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg).
- *
- * In pre-2.5.X...
- * The midlayer allocates an S/G array dynamically when a command is issued
- * using SCSI malloc.  This array, which is in an OS dependent format that
- * must later be copied to our private S/G list, is sized to house just the
- * number of segments needed for the current transfer.  Since the code that
- * sizes the SCSI malloc pool does not take into consideration fragmentation
- * of the pool, executing transactions numbering just a fraction of our
- * concurrent transaction limit with list lengths aproaching AHC_NSEG will
- * quickly depleat the SCSI malloc pool of usable space.  Unfortunately, the
- * mid-layer does not properly handle this scsi malloc failures for the S/G
- * array and the result can be a lockup of the I/O subsystem.  We try to size
- * our S/G list so that it satisfies our drivers allocation requirements in
- * addition to avoiding fragmentation of the SCSI malloc pool.
- */
-static void
-ahc_linux_size_nseg(void)
-{
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-	u_int cur_size;
-	u_int best_size;
-
-	/*
-	 * The SCSI allocator rounds to the nearest 512 bytes
-	 * an cannot allocate across a page boundary.  Our algorithm
-	 * is to start at 1K of scsi malloc space per-command and
-	 * loop through all factors of the PAGE_SIZE and pick the best.
-	 */
-	best_size = 0;
-	for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
-		u_int nseg;
-
-		nseg = cur_size / sizeof(struct scatterlist);
-		if (nseg < AHC_LINUX_MIN_NSEG)
-			continue;
-
-		if (best_size == 0) {
-			best_size = cur_size;
-			ahc_linux_nseg = nseg;
-		} else {
-			u_int best_rem;
-			u_int cur_rem;
-
-			/*
-			 * Compare the traits of the current "best_size"
-			 * with the current size to determine if the
-			 * current size is a better size.
-			 */
-			best_rem = best_size % sizeof(struct scatterlist);
-			cur_rem = cur_size % sizeof(struct scatterlist);
-			if (cur_rem < best_rem) {
-				best_size = cur_size;
-				ahc_linux_nseg = nseg;
-			}
-		}
-	}
-#endif
-}
-
 /*
  * Try to detect an Adaptec 7XXX controller.
  */
 static int
-ahc_linux_detect(Scsi_Host_Template *template)
+ahc_linux_detect(struct scsi_host_template *template)
 {
 	struct	ahc_softc *ahc;
 	int     found = 0;
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-	/*
-	 * It is a bug that the upper layer takes
-	 * this lock just prior to calling us.
-	 */
-	spin_unlock_irq(&io_request_lock);
-#endif
-
 	/*
 	 * Sanity checking of Linux SCSI data structures so
 	 * that some of our hacks^H^H^H^H^Hassumptions aren't
@@ -764,7 +543,6 @@ ahc_linux_detect(Scsi_Host_Template *template)
 		printf("ahc_linux_detect: Unable to attach\n");
 		return (0);
 	}
-	ahc_linux_size_nseg();
 	/*
 	 * If we've been passed any parameters, process them now.
 	 */
@@ -793,48 +571,11 @@ ahc_linux_detect(Scsi_Host_Template *template)
 			found++;
 	}
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-	spin_lock_irq(&io_request_lock);
-#endif
 	aic7xxx_detect_complete++;
 
 	return (found);
 }
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/*
- * Free the passed in Scsi_Host memory structures prior to unloading the
- * module.
- */
-int
-ahc_linux_release(struct Scsi_Host * host)
-{
-	struct ahc_softc *ahc;
-	u_long l;
-
-	ahc_list_lock(&l);
-	if (host != NULL) {
-
-		/*
-		 * We should be able to just perform
-		 * the free directly, but check our
-		 * list for extra sanity.
-		 */
-		ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata);
-		if (ahc != NULL) {
-			u_long s;
-
-			ahc_lock(ahc, &s);
-			ahc_intr_enable(ahc, FALSE);
-			ahc_unlock(ahc, &s);
-			ahc_free(ahc);
-		}
-	}
-	ahc_list_unlock(&l);
-	return (0);
-}
-#endif
-
 /*
  * Return a string describing the driver.
  */
@@ -867,11 +608,10 @@ ahc_linux_info(struct Scsi_Host *host)
  * Queue an SCB to the controller.
  */
 static int
-ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
+ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 {
 	struct	 ahc_softc *ahc;
 	struct	 ahc_linux_device *dev;
-	u_long	 flags;
 
 	ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
 
@@ -880,205 +620,149 @@ ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
 	 */
 	cmd->scsi_done = scsi_done;
 
-	ahc_midlayer_entrypoint_lock(ahc, &flags);
-
 	/*
 	 * Close the race of a command that was in the process of
 	 * being queued to us just as our simq was frozen.  Let
 	 * DV commands through so long as we are only frozen to
 	 * perform DV.
 	 */
-	if (ahc->platform_data->qfrozen != 0) {
+	if (ahc->platform_data->qfrozen != 0)
+		return SCSI_MLQUEUE_HOST_BUSY;
 
-		ahc_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
-		ahc_linux_queue_cmd_complete(ahc, cmd);
-		ahc_schedule_completeq(ahc);
-		ahc_midlayer_entrypoint_unlock(ahc, &flags);
-		return (0);
-	}
 	dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
-				   cmd->device->lun, /*alloc*/TRUE);
-	if (dev == NULL) {
-		ahc_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
-		ahc_linux_queue_cmd_complete(ahc, cmd);
-		ahc_schedule_completeq(ahc);
-		ahc_midlayer_entrypoint_unlock(ahc, &flags);
-		printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n",
-		       ahc_name(ahc));
-		return (0);
-	}
+				   cmd->device->lun);
+	BUG_ON(dev == NULL);
+
 	cmd->result = CAM_REQ_INPROG << 16;
-	TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
-	if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
-		TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
-		dev->flags |= AHC_DEV_ON_RUN_LIST;
-		ahc_linux_run_device_queues(ahc);
-	}
-	ahc_midlayer_entrypoint_unlock(ahc, &flags);
-	return (0);
+
+	return ahc_linux_run_command(ahc, dev, cmd);
 }
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 static int
-ahc_linux_slave_alloc(Scsi_Device *device)
+ahc_linux_slave_alloc(struct scsi_device *device)
 {
 	struct	ahc_softc *ahc;
+	struct ahc_linux_target *targ;
+	struct scsi_target *starget = device->sdev_target;
+	struct ahc_linux_device *dev;
+	unsigned int target_offset;
+	unsigned long flags;
+	int retval = -ENOMEM;
+
+	target_offset = starget->id;
+	if (starget->channel != 0)
+		target_offset += 8;
 
 	ahc = *((struct ahc_softc **)device->host->hostdata);
 	if (bootverbose)
 		printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
-	return (0);
+	ahc_lock(ahc, &flags);
+	targ = ahc->platform_data->targets[target_offset];
+	if (targ == NULL) {
+		targ = ahc_linux_alloc_target(ahc, starget->channel, starget->id);
+		struct seeprom_config *sc = ahc->seep_config;
+		if (targ == NULL)
+			goto out;
+
+		if (sc) {
+			unsigned short scsirate;
+			struct ahc_devinfo devinfo;
+			struct ahc_initiator_tinfo *tinfo;
+			struct ahc_tmode_tstate *tstate;
+			char channel = starget->channel + 'A';
+			unsigned int our_id = ahc->our_id;
+
+			if (starget->channel)
+				our_id = ahc->our_id_b;
+
+			if ((ahc->features & AHC_ULTRA2) != 0) {
+				scsirate = sc->device_flags[target_offset] & CFXFER;
+			} else {
+				scsirate = (sc->device_flags[target_offset] & CFXFER) << 4;
+				if (sc->device_flags[target_offset] & CFSYNCH)
+					scsirate |= SOFS;
+			}
+			if (sc->device_flags[target_offset] & CFWIDEB) {
+				scsirate |= WIDEXFER;
+				spi_max_width(starget) = 1;
+			} else
+				spi_max_width(starget) = 0;
+			spi_min_period(starget) = 
+				ahc_find_period(ahc, scsirate, AHC_SYNCRATE_DT);
+			tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
+						    targ->target, &tstate);
+			ahc_compile_devinfo(&devinfo, our_id, targ->target,
+					    CAM_LUN_WILDCARD, channel,
+					    ROLE_INITIATOR);
+			ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
+					 AHC_TRANS_GOAL, /*paused*/FALSE);
+			ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+				      AHC_TRANS_GOAL, /*paused*/FALSE);
+		}
+			
+	}
+	dev = targ->devices[device->lun];
+	if (dev == NULL) {
+		dev = ahc_linux_alloc_device(ahc, targ, device->lun);
+		if (dev == NULL)
+			goto out;
+	}
+	retval = 0;
+
+ out:
+	ahc_unlock(ahc, &flags);
+	return retval;
 }
 
 static int
-ahc_linux_slave_configure(Scsi_Device *device)
+ahc_linux_slave_configure(struct scsi_device *device)
 {
 	struct	ahc_softc *ahc;
 	struct	ahc_linux_device *dev;
-	u_long	flags;
 
 	ahc = *((struct ahc_softc **)device->host->hostdata);
+
 	if (bootverbose)
 		printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
-	ahc_midlayer_entrypoint_lock(ahc, &flags);
-	/*
-	 * Since Linux has attached to the device, configure
-	 * it so we don't free and allocate the device
-	 * structure on every command.
-	 */
-	dev = ahc_linux_get_device(ahc, device->channel,
-				   device->id, device->lun,
-				   /*alloc*/TRUE);
-	if (dev != NULL) {
-		dev->flags &= ~AHC_DEV_UNCONFIGURED;
-		dev->scsi_device = device;
-		ahc_linux_device_queue_depth(ahc, dev);
-	}
-	ahc_midlayer_entrypoint_unlock(ahc, &flags);
+
+	dev = ahc_linux_get_device(ahc, device->channel, device->id,
+				   device->lun);
+	dev->scsi_device = device;
+	ahc_linux_device_queue_depth(ahc, dev);
 
 	/* Initial Domain Validation */
 	if (!spi_initial_dv(device->sdev_target))
 		spi_dv_device(device);
 
-	return (0);
+	return 0;
 }
 
 static void
-ahc_linux_slave_destroy(Scsi_Device *device)
+ahc_linux_slave_destroy(struct scsi_device *device)
 {
 	struct	ahc_softc *ahc;
 	struct	ahc_linux_device *dev;
-	u_long	flags;
 
 	ahc = *((struct ahc_softc **)device->host->hostdata);
 	if (bootverbose)
 		printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
-	ahc_midlayer_entrypoint_lock(ahc, &flags);
 	dev = ahc_linux_get_device(ahc, device->channel,
-				   device->id, device->lun,
-					   /*alloc*/FALSE);
-	/*
-	 * 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 & AHC_DEV_SLAVE_CONFIGURED) != 0) {
-		dev->flags |= AHC_DEV_UNCONFIGURED;
-		if (TAILQ_EMPTY(&dev->busyq)
-		 && dev->active == 0
-	 	 && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
-			ahc_linux_free_device(ahc, dev);
-	}
-	ahc_midlayer_entrypoint_unlock(ahc, &flags);
-}
-#else
-/*
- * Sets the queue depth for each SCSI device hanging
- * off the input host adapter.
- */
-static void
-ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs)
-{
-	Scsi_Device *device;
-	Scsi_Device *ldev;
-	struct	ahc_softc *ahc;
-	u_long	flags;
+				   device->id, device->lun);
 
-	ahc = *((struct ahc_softc **)host->hostdata);
-	ahc_lock(ahc, &flags);
-	for (device = scsi_devs; device != NULL; device = device->next) {
+	BUG_ON(dev->active);
 
-		/*
-		 * Watch out for duplicate devices.  This works around
-		 * some quirks in how the SCSI scanning code does its
-		 * device management.
-		 */
-		for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
-			if (ldev->host == device->host
-			 && ldev->channel == device->channel
-			 && ldev->id == device->id
-			 && ldev->lun == device->lun)
-				break;
-		}
-		/* Skip duplicate. */
-		if (ldev != device)
-			continue;
-
-		if (device->host == host) {
-			struct	 ahc_linux_device *dev;
-
-			/*
-			 * Since Linux has attached to the device, configure
-			 * it so we don't free and allocate the device
-			 * structure on every command.
-			 */
-			dev = ahc_linux_get_device(ahc, device->channel,
-						   device->id, device->lun,
-						   /*alloc*/TRUE);
-			if (dev != NULL) {
-				dev->flags &= ~AHC_DEV_UNCONFIGURED;
-				dev->scsi_device = device;
-				ahc_linux_device_queue_depth(ahc, dev);
-				device->queue_depth = dev->openings
-						    + dev->active;
-				if ((dev->flags & (AHC_DEV_Q_BASIC
-						| AHC_DEV_Q_TAGGED)) == 0) {
-					/*
-					 * 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.
-					 */
-					device->queue_depth = 2;
-				}
-			}
-		}
-	}
-	ahc_unlock(ahc, &flags);
+	ahc_linux_free_device(ahc, dev);
 }
-#endif
 
 #if defined(__i386__)
 /*
  * Return the disk geometry for the given SCSI device.
  */
 static int
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 		    sector_t capacity, int geom[])
 {
 	uint8_t *bh;
-#else
-ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
-{
-	struct	scsi_device *sdev = disk->device;
-	u_long	capacity = disk->capacity;
-	struct	buffer_head *bh;
-#endif
 	int	 heads;
 	int	 sectors;
 	int	 cylinders;
@@ -1090,22 +774,11 @@ ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
 	ahc = *((struct ahc_softc **)sdev->host->hostdata);
 	channel = sdev->channel;
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 	bh = scsi_bios_ptable(bdev);
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
-	bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
-#else
-	bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
-#endif
-
 	if (bh) {
 		ret = scsi_partsize(bh, capacity,
 				    &geom[2], &geom[0], &geom[1]);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 		kfree(bh);
-#else
-		brelse(bh);
-#endif
 		if (ret != -1)
 			return (ret);
 	}
@@ -1135,7 +808,7 @@ ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
  * Abort the current SCSI command(s).
  */
 static int
-ahc_linux_abort(Scsi_Cmnd *cmd)
+ahc_linux_abort(struct scsi_cmnd *cmd)
 {
 	int error;
 
@@ -1149,7 +822,7 @@ ahc_linux_abort(Scsi_Cmnd *cmd)
  * Attempt to send a target reset message to the device that timed out.
  */
 static int
-ahc_linux_dev_reset(Scsi_Cmnd *cmd)
+ahc_linux_dev_reset(struct scsi_cmnd *cmd)
 {
 	int error;
 
@@ -1163,18 +836,14 @@ ahc_linux_dev_reset(Scsi_Cmnd *cmd)
  * Reset the SCSI bus.
  */
 static int
-ahc_linux_bus_reset(Scsi_Cmnd *cmd)
+ahc_linux_bus_reset(struct scsi_cmnd *cmd)
 {
 	struct ahc_softc *ahc;
-	u_long s;
 	int    found;
 
 	ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
-	ahc_midlayer_entrypoint_lock(ahc, &s);
 	found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
 				  /*initiate reset*/TRUE);
-	ahc_linux_run_complete_queue(ahc);
-	ahc_midlayer_entrypoint_unlock(ahc, &s);
 
 	if (bootverbose)
 		printf("%s: SCSI bus reset delivered. "
@@ -1183,7 +852,7 @@ ahc_linux_bus_reset(Scsi_Cmnd *cmd)
 	return SUCCESS;
 }
 
-Scsi_Host_Template aic7xxx_driver_template = {
+struct scsi_host_template aic7xxx_driver_template = {
 	.module			= THIS_MODULE,
 	.name			= "aic7xxx",
 	.proc_info		= ahc_linux_proc_info,
@@ -1206,33 +875,6 @@ Scsi_Host_Template aic7xxx_driver_template = {
 
 /**************************** Tasklet Handler *********************************/
 
-/*
- * In 2.4.X and above, this routine is called from a tasklet,
- * so we must re-acquire our lock prior to executing this code.
- * In all prior kernels, ahc_schedule_runq() calls this routine
- * directly and ahc_schedule_runq() is called with our lock held.
- */
-static void
-ahc_runq_tasklet(unsigned long data)
-{
-	struct ahc_softc* ahc;
-	struct ahc_linux_device *dev;
-	u_long flags;
-
-	ahc = (struct ahc_softc *)data;
-	ahc_lock(ahc, &flags);
-	while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
-	
-		TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
-		dev->flags &= ~AHC_DEV_ON_RUN_LIST;
-		ahc_linux_check_device_queue(ahc, dev);
-		/* Yeild to our interrupt handler */
-		ahc_unlock(ahc, &flags);
-		ahc_lock(ahc, &flags);
-	}
-	ahc_unlock(ahc, &flags);
-}
-
 /******************************** Macros **************************************/
 #define BUILD_SCSIID(ahc, cmd)						    \
 	((((cmd)->device->id << TID_SHIFT) & TID)			    \
@@ -1278,37 +920,11 @@ int
 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
 		 int flags, bus_dmamap_t *mapp)
 {
-	bus_dmamap_t map;
-
-	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 (ahc->dev_softc != NULL)
-		if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) {
-			printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
-			kfree(map);
-			return (ENODEV);
-		}
 	*vaddr = pci_alloc_consistent(ahc->dev_softc,
-				      dmat->maxsize, &map->bus_addr);
-	if (ahc->dev_softc != NULL)
-		if (pci_set_dma_mask(ahc->dev_softc,
-				     ahc->platform_data->hw_dma_mask)) {
-			printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
-			kfree(map);
-			return (ENODEV);
-		}
+				      dmat->maxsize, mapp);
 	if (*vaddr == NULL)
-		return (ENOMEM);
-	*mapp = map;
-	return(0);
+		return ENOMEM;
+	return 0;
 }
 
 void
@@ -1316,7 +932,7 @@ ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
 		void* vaddr, bus_dmamap_t map)
 {
 	pci_free_consistent(ahc->dev_softc, dmat->maxsize,
-			    vaddr, map->bus_addr);
+			    vaddr, map);
 }
 
 int
@@ -1330,7 +946,7 @@ ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
 	 */
 	bus_dma_segment_t stack_sg;
 
-	stack_sg.ds_addr = map->bus_addr;
+	stack_sg.ds_addr = map;
 	stack_sg.ds_len = dmat->maxsize;
 	cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 	return (0);
@@ -1339,12 +955,6 @@ ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
 void
 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
 {
-	/*
-	 * The map may is NULL in our < 2.3.X implementation.
-	 * Now it's 2.6.5, but just in case...
-	 */
-	BUG_ON(map == NULL);
-	free(map, M_DEVBUF);
 }
 
 int
@@ -1550,7 +1160,7 @@ __setup("aic7xxx=", aic7xxx_setup);
 uint32_t aic7xxx_verbose;
 
 int
-ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
+ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
 {
 	char	 buf[80];
 	struct	 Scsi_Host *host;
@@ -1564,11 +1174,7 @@ ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
 
 	*((struct ahc_softc **)host->hostdata) = ahc;
 	ahc_lock(ahc, &s);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 	scsi_assign_lock(host, &ahc->platform_data->spin_lock);
-#elif AHC_SCSI_HAS_HOST_LOCK != 0
-	host->lock = &ahc->platform_data->spin_lock;
-#endif
 	ahc->platform_data->host = host;
 	host->can_queue = AHC_MAX_QUEUE;
 	host->cmd_per_lun = 2;
@@ -1587,19 +1193,14 @@ ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
 		ahc_set_name(ahc, new_name);
 	}
 	host->unique_id = ahc->unit;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-	scsi_set_pci_device(host, ahc->dev_softc);
-#endif
 	ahc_linux_initialize_scsi_bus(ahc);
 	ahc_intr_enable(ahc, TRUE);
 	ahc_unlock(ahc, &s);
 
 	host->transportt = ahc_linux_transport_template;
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 	scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
 	scsi_scan_host(host);
-#endif
 	return (0);
 }
 
@@ -1717,19 +1318,9 @@ ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
 	if (ahc->platform_data == NULL)
 		return (ENOMEM);
 	memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
-	TAILQ_INIT(&ahc->platform_data->completeq);
-	TAILQ_INIT(&ahc->platform_data->device_runq);
 	ahc->platform_data->irq = AHC_LINUX_NOIRQ;
-	ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
 	ahc_lockinit(ahc);
-	ahc_done_lockinit(ahc);
-	init_timer(&ahc->platform_data->completeq_timer);
-	ahc->platform_data->completeq_timer.data = (u_long)ahc;
-	ahc->platform_data->completeq_timer.function =
-	    (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
 	init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
-	tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
-		     (unsigned long)ahc);
 	ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
 	ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
 	if (aic7xxx_pci_parity == 0)
@@ -1746,12 +1337,8 @@ ahc_platform_free(struct ahc_softc *ahc)
 	int i, j;
 
 	if (ahc->platform_data != NULL) {
-		del_timer_sync(&ahc->platform_data->completeq_timer);
-		tasklet_kill(&ahc->platform_data->runq_tasklet);
 		if (ahc->platform_data->host != NULL) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 			scsi_remove_host(ahc->platform_data->host);
-#endif
 			scsi_host_put(ahc->platform_data->host);
 		}
 
@@ -1787,16 +1374,7 @@ ahc_platform_free(struct ahc_so