patch-2.4.22 linux-2.4.22/arch/ia64/sn/io/sn1/xtalk.c

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diff -urN linux-2.4.21/arch/ia64/sn/io/sn1/xtalk.c linux-2.4.22/arch/ia64/sn/io/sn1/xtalk.c
@@ -1,1003 +0,0 @@
-/* $Id: xtalk.c,v 1.2 2002/11/21 17:51:57 jh Exp $
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 1992-1997,2000-2002 Silicon Graphics, Inc. All rights reserved.
- */
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <asm/sn/sgi.h>
-#include <asm/sn/driver.h>
-#include <asm/sn/io.h>
-#include <asm/sn/iograph.h>
-#include <asm/sn/invent.h>
-#include <asm/sn/hcl.h>
-#include <asm/sn/labelcl.h>
-#include <asm/sn/hcl_util.h>
-#include <asm/sn/xtalk/xtalk.h>
-#include <asm/sn/xtalk/xswitch.h>
-#include <asm/sn/xtalk/xwidget.h>
-#include <asm/sn/xtalk/xtalk_private.h>
-
-/*
- * Implement crosstalk provider operations.  The xtalk* layer provides a
- * platform-independent interface for crosstalk devices.  This layer
- * switches among the possible implementations of a crosstalk adapter.
- *
- * On platforms with only one possible xtalk provider, macros can be
- * set up at the top that cause the table lookups and indirections to
- * completely disappear.
- */
-
-#define	NEW(ptr)	(ptr = kmalloc(sizeof (*(ptr)), GFP_KERNEL))
-#define	DEL(ptr)	(kfree(ptr))
-
-char                    widget_info_fingerprint[] = "widget_info";
-
-cdl_p                   xtalk_registry = NULL;
-
-#define	DEV_FUNC(dev,func)	hub_##func
-#define	CAST_PIOMAP(x)		((hub_piomap_t)(x))
-#define	CAST_DMAMAP(x)		((hub_dmamap_t)(x))
-#define	CAST_INTR(x)		((hub_intr_t)(x))
-
-/* =====================================================================
- *            Function Table of Contents
- */
-xtalk_piomap_t          xtalk_piomap_alloc(devfs_handle_t, device_desc_t, iopaddr_t, size_t, size_t, unsigned);
-void                    xtalk_piomap_free(xtalk_piomap_t);
-caddr_t                 xtalk_piomap_addr(xtalk_piomap_t, iopaddr_t, size_t);
-void                    xtalk_piomap_done(xtalk_piomap_t);
-caddr_t                 xtalk_piotrans_addr(devfs_handle_t, device_desc_t, iopaddr_t, size_t, unsigned);
-caddr_t                 xtalk_pio_addr(devfs_handle_t, device_desc_t, iopaddr_t, size_t, xtalk_piomap_t *, unsigned);
-void                    xtalk_set_early_piotrans_addr(xtalk_early_piotrans_addr_f *);
-caddr_t                 xtalk_early_piotrans_addr(xwidget_part_num_t, xwidget_mfg_num_t, int, iopaddr_t, size_t, unsigned);
-static caddr_t          null_xtalk_early_piotrans_addr(xwidget_part_num_t, xwidget_mfg_num_t, int, iopaddr_t, size_t, unsigned);
-xtalk_dmamap_t          xtalk_dmamap_alloc(devfs_handle_t, device_desc_t, size_t, unsigned);
-void                    xtalk_dmamap_free(xtalk_dmamap_t);
-iopaddr_t               xtalk_dmamap_addr(xtalk_dmamap_t, paddr_t, size_t);
-alenlist_t              xtalk_dmamap_list(xtalk_dmamap_t, alenlist_t, unsigned);
-void                    xtalk_dmamap_done(xtalk_dmamap_t);
-iopaddr_t               xtalk_dmatrans_addr(devfs_handle_t, device_desc_t, paddr_t, size_t, unsigned);
-alenlist_t              xtalk_dmatrans_list(devfs_handle_t, device_desc_t, alenlist_t, unsigned);
-void			xtalk_dmamap_drain(xtalk_dmamap_t);
-void			xtalk_dmaaddr_drain(devfs_handle_t, iopaddr_t, size_t);
-void			xtalk_dmalist_drain(devfs_handle_t, alenlist_t);
-xtalk_intr_t            xtalk_intr_alloc(devfs_handle_t, device_desc_t, devfs_handle_t);
-xtalk_intr_t            xtalk_intr_alloc_nothd(devfs_handle_t, device_desc_t, devfs_handle_t);
-void                    xtalk_intr_free(xtalk_intr_t);
-int                     xtalk_intr_connect(xtalk_intr_t, xtalk_intr_setfunc_t, void *);
-void                    xtalk_intr_disconnect(xtalk_intr_t);
-devfs_handle_t            xtalk_intr_cpu_get(xtalk_intr_t);
-int                     xtalk_error_handler(devfs_handle_t, int, ioerror_mode_t, ioerror_t *);
-int                     xtalk_error_devenable(devfs_handle_t, int, int);
-void                    xtalk_provider_startup(devfs_handle_t);
-void                    xtalk_provider_shutdown(devfs_handle_t);
-devfs_handle_t            xtalk_intr_dev_get(xtalk_intr_t);
-xwidgetnum_t            xtalk_intr_target_get(xtalk_intr_t);
-xtalk_intr_vector_t     xtalk_intr_vector_get(xtalk_intr_t);
-iopaddr_t               xtalk_intr_addr_get(struct xtalk_intr_s *);
-void                   *xtalk_intr_sfarg_get(xtalk_intr_t);
-devfs_handle_t            xtalk_pio_dev_get(xtalk_piomap_t);
-xwidgetnum_t            xtalk_pio_target_get(xtalk_piomap_t);
-iopaddr_t               xtalk_pio_xtalk_addr_get(xtalk_piomap_t);
-ulong                   xtalk_pio_mapsz_get(xtalk_piomap_t);
-caddr_t                 xtalk_pio_kvaddr_get(xtalk_piomap_t);
-devfs_handle_t            xtalk_dma_dev_get(xtalk_dmamap_t);
-xwidgetnum_t            xtalk_dma_target_get(xtalk_dmamap_t);
-xwidget_info_t          xwidget_info_chk(devfs_handle_t);
-xwidget_info_t          xwidget_info_get(devfs_handle_t);
-void                    xwidget_info_set(devfs_handle_t, xwidget_info_t);
-devfs_handle_t            xwidget_info_dev_get(xwidget_info_t);
-xwidgetnum_t            xwidget_info_id_get(xwidget_info_t);
-devfs_handle_t            xwidget_info_master_get(xwidget_info_t);
-xwidgetnum_t            xwidget_info_masterid_get(xwidget_info_t);
-xwidget_part_num_t      xwidget_info_part_num_get(xwidget_info_t);
-xwidget_mfg_num_t       xwidget_info_mfg_num_get(xwidget_info_t);
-char 			*xwidget_info_name_get(xwidget_info_t);
-void                    xtalk_init(void);
-void                    xtalk_provider_register(devfs_handle_t, xtalk_provider_t *);
-void                    xtalk_provider_unregister(devfs_handle_t);
-xtalk_provider_t       *xtalk_provider_fns_get(devfs_handle_t);
-int                     xwidget_driver_register(xwidget_part_num_t, 
-						xwidget_mfg_num_t, 
-						char *, unsigned);
-void                    xwidget_driver_unregister(char *);
-int                     xwidget_register(xwidget_hwid_t, devfs_handle_t, 
-					 xwidgetnum_t, devfs_handle_t, 
-					 xwidgetnum_t, async_attach_t);
-int			xwidget_unregister(devfs_handle_t);
-void                    xwidget_reset(devfs_handle_t);
-char			*xwidget_name_get(devfs_handle_t);
-#if !defined(DEV_FUNC)
-/*
- * There is more than one possible provider
- * for this platform. We need to examine the
- * master vertex of the current vertex for
- * a provider function structure, and indirect
- * through the appropriately named member.
- */
-#define	DEV_FUNC(dev,func)	xwidget_to_provider_fns(dev)->func
-#define	CAST_PIOMAP(x)		((xtalk_piomap_t)(x))
-#define	CAST_DMAMAP(x)		((xtalk_dmamap_t)(x))
-#define	CAST_INTR(x)		((xtalk_intr_t)(x))
-
-static xtalk_provider_t *
-xwidget_to_provider_fns(devfs_handle_t xconn)
-{
-    xwidget_info_t          widget_info;
-    xtalk_provider_t       *provider_fns;
-
-    widget_info = xwidget_info_get(xconn);
-    ASSERT(widget_info != NULL);
-
-    provider_fns = xwidget_info_pops_get(widget_info);
-    ASSERT(provider_fns != NULL);
-
-    return (provider_fns);
-}
-#endif
-
-/*
- * Many functions are not passed their vertex
- * information directly; rather, they must
- * dive through a resource map. These macros
- * are available to coordinate this detail.
- */
-#define	PIOMAP_FUNC(map,func)	DEV_FUNC(map->xp_dev,func)
-#define	DMAMAP_FUNC(map,func)	DEV_FUNC(map->xd_dev,func)
-#define	INTR_FUNC(intr,func)	DEV_FUNC(intr_hdl->xi_dev,func)
-
-/* =====================================================================
- *                    PIO MANAGEMENT
- *
- *      For mapping system virtual address space to
- *      xtalk space on a specified widget
- */
-
-xtalk_piomap_t
-xtalk_piomap_alloc(devfs_handle_t dev,	/* set up mapping for this device */
-		   device_desc_t dev_desc,	/* device descriptor */
-		   iopaddr_t xtalk_addr,	/* map for this xtalk_addr range */
-		   size_t byte_count,
-		   size_t byte_count_max,	/* maximum size of a mapping */
-		   unsigned flags)
-{				/* defined in sys/pio.h */
-    return (xtalk_piomap_t) DEV_FUNC(dev, piomap_alloc)
-	(dev, dev_desc, xtalk_addr, byte_count, byte_count_max, flags);
-}
-
-
-void
-xtalk_piomap_free(xtalk_piomap_t xtalk_piomap)
-{
-    PIOMAP_FUNC(xtalk_piomap, piomap_free)
-	(CAST_PIOMAP(xtalk_piomap));
-}
-
-
-caddr_t
-xtalk_piomap_addr(xtalk_piomap_t xtalk_piomap,	/* mapping resources */
-		  iopaddr_t xtalk_addr,		/* map for this xtalk address */
-		  size_t byte_count)
-{				/* map this many bytes */
-    return PIOMAP_FUNC(xtalk_piomap, piomap_addr)
-	(CAST_PIOMAP(xtalk_piomap), xtalk_addr, byte_count);
-}
-
-
-void
-xtalk_piomap_done(xtalk_piomap_t xtalk_piomap)
-{
-    PIOMAP_FUNC(xtalk_piomap, piomap_done)
-	(CAST_PIOMAP(xtalk_piomap));
-}
-
-
-caddr_t
-xtalk_piotrans_addr(devfs_handle_t dev,	/* translate for this device */
-		    device_desc_t dev_desc,	/* device descriptor */
-		    iopaddr_t xtalk_addr,	/* Crosstalk address */
-		    size_t byte_count,	/* map this many bytes */
-		    unsigned flags)
-{				/* (currently unused) */
-    return DEV_FUNC(dev, piotrans_addr)
-	(dev, dev_desc, xtalk_addr, byte_count, flags);
-}
-
-caddr_t
-xtalk_pio_addr(devfs_handle_t dev,	/* translate for this device */
-	       device_desc_t dev_desc,	/* device descriptor */
-	       iopaddr_t addr,		/* starting address (or offset in window) */
-	       size_t byte_count,	/* map this many bytes */
-	       xtalk_piomap_t *mapp,	/* where to return the map pointer */
-	       unsigned flags)
-{					/* PIO flags */
-    xtalk_piomap_t          map = 0;
-    caddr_t                 res;
-
-    if (mapp)
-	*mapp = 0;			/* record "no map used" */
-
-    res = xtalk_piotrans_addr
-	(dev, dev_desc, addr, byte_count, flags);
-    if (res)
-	return res;			/* xtalk_piotrans worked */
-
-    map = xtalk_piomap_alloc
-	(dev, dev_desc, addr, byte_count, byte_count, flags);
-    if (!map)
-	return res;			/* xtalk_piomap_alloc failed */
-
-    res = xtalk_piomap_addr
-	(map, addr, byte_count);
-    if (!res) {
-	xtalk_piomap_free(map);
-	return res;			/* xtalk_piomap_addr failed */
-    }
-    if (mapp)
-	*mapp = map;			/* pass back map used */
-
-    return res;				/* xtalk_piomap_addr succeeded */
-}
-
-/* =====================================================================
- *            EARLY PIOTRANS SUPPORT
- *
- *      There are places where drivers (mgras, for instance)
- *      need to get PIO translations before the infrastructure
- *      is extended to them (setting up textports, for
- *      instance). These drivers should call
- *      xtalk_early_piotrans_addr with their xtalk ID
- *      information, a sequence number (so we can use the second
- *      mgras for instance), and the usual piotrans parameters.
- *
- *      Machine specific code should provide an implementation
- *      of early_piotrans_addr, and present a pointer to this
- *      function to xtalk_set_early_piotrans_addr so it can be
- *      used by clients without the clients having to know what
- *      platform or what xtalk provider is in use.
- */
-
-static xtalk_early_piotrans_addr_f null_xtalk_early_piotrans_addr;
-
-xtalk_early_piotrans_addr_f *impl_early_piotrans_addr = null_xtalk_early_piotrans_addr;
-
-/* xtalk_set_early_piotrans_addr:
- * specify the early_piotrans_addr implementation function.
- */
-void
-xtalk_set_early_piotrans_addr(xtalk_early_piotrans_addr_f *impl)
-{
-    impl_early_piotrans_addr = impl;
-}
-
-/* xtalk_early_piotrans_addr:
- * figure out a PIO address for the "nth" crosstalk widget that
- * matches the specified part and mfgr number. Returns NULL if
- * there is no such widget, or if the requested mapping can not
- * be constructed.
- * Limitations on which crosstalk slots (and busses) are
- * checked, and definitions of the ordering of the search across
- * the crosstalk slots, are defined by the platform.
- */
-caddr_t
-xtalk_early_piotrans_addr(xwidget_part_num_t part_num,
-			  xwidget_mfg_num_t mfg_num,
-			  int which,
-			  iopaddr_t xtalk_addr,
-			  size_t byte_count,
-			  unsigned flags)
-{
-    return impl_early_piotrans_addr
-	(part_num, mfg_num, which, xtalk_addr, byte_count, flags);
-}
-
-/* null_xtalk_early_piotrans_addr:
- * used as the early_piotrans_addr implementation until and
- * unless a real implementation is provided. In DEBUG kernels,
- * we want to know who is calling before the implementation is
- * registered; in non-DEBUG kernels, return NULL representing
- * lack of mapping support.
- */
-/*ARGSUSED */
-static caddr_t
-null_xtalk_early_piotrans_addr(xwidget_part_num_t part_num,
-			       xwidget_mfg_num_t mfg_num,
-			       int which,
-			       iopaddr_t xtalk_addr,
-			       size_t byte_count,
-			       unsigned flags)
-{
-#if DEBUG
-    PRINT_PANIC("null_xtalk_early_piotrans_addr");
-#endif
-    return NULL;
-}
-
-/* =====================================================================
- *                    DMA MANAGEMENT
- *
- *      For mapping from crosstalk space to system
- *      physical space.
- */
-
-xtalk_dmamap_t
-xtalk_dmamap_alloc(devfs_handle_t dev,	/* set up mappings for this device */
-		   device_desc_t dev_desc,	/* device descriptor */
-		   size_t byte_count_max,	/* max size of a mapping */
-		   unsigned flags)
-{				/* defined in dma.h */
-    return (xtalk_dmamap_t) DEV_FUNC(dev, dmamap_alloc)
-	(dev, dev_desc, byte_count_max, flags);
-}
-
-
-void
-xtalk_dmamap_free(xtalk_dmamap_t xtalk_dmamap)
-{
-    DMAMAP_FUNC(xtalk_dmamap, dmamap_free)
-	(CAST_DMAMAP(xtalk_dmamap));
-}
-
-
-iopaddr_t
-xtalk_dmamap_addr(xtalk_dmamap_t xtalk_dmamap,	/* use these mapping resources */
-		  paddr_t paddr,	/* map for this address */
-		  size_t byte_count)
-{				/* map this many bytes */
-    return DMAMAP_FUNC(xtalk_dmamap, dmamap_addr)
-	(CAST_DMAMAP(xtalk_dmamap), paddr, byte_count);
-}
-
-
-alenlist_t
-xtalk_dmamap_list(xtalk_dmamap_t xtalk_dmamap,	/* use these mapping resources */
-		  alenlist_t alenlist,	/* map this Address/Length List */
-		  unsigned flags)
-{
-    return DMAMAP_FUNC(xtalk_dmamap, dmamap_list)
-	(CAST_DMAMAP(xtalk_dmamap), alenlist, flags);
-}
-
-
-void
-xtalk_dmamap_done(xtalk_dmamap_t xtalk_dmamap)
-{
-    DMAMAP_FUNC(xtalk_dmamap, dmamap_done)
-	(CAST_DMAMAP(xtalk_dmamap));
-}
-
-
-iopaddr_t
-xtalk_dmatrans_addr(devfs_handle_t dev,	/* translate for this device */
-		    device_desc_t dev_desc,	/* device descriptor */
-		    paddr_t paddr,	/* system physical address */
-		    size_t byte_count,	/* length */
-		    unsigned flags)
-{				/* defined in dma.h */
-    return DEV_FUNC(dev, dmatrans_addr)
-	(dev, dev_desc, paddr, byte_count, flags);
-}
-
-
-alenlist_t
-xtalk_dmatrans_list(devfs_handle_t dev,	/* translate for this device */
-		    device_desc_t dev_desc,	/* device descriptor */
-		    alenlist_t palenlist,	/* system address/length list */
-		    unsigned flags)
-{				/* defined in dma.h */
-    return DEV_FUNC(dev, dmatrans_list)
-	(dev, dev_desc, palenlist, flags);
-}
-
-void
-xtalk_dmamap_drain(xtalk_dmamap_t map)
-{
-    DMAMAP_FUNC(map, dmamap_drain)
-	(CAST_DMAMAP(map));
-}
-
-void
-xtalk_dmaaddr_drain(devfs_handle_t dev, paddr_t addr, size_t size)
-{
-    DEV_FUNC(dev, dmaaddr_drain)
-	(dev, addr, size);
-}
-
-void
-xtalk_dmalist_drain(devfs_handle_t dev, alenlist_t list)
-{
-    DEV_FUNC(dev, dmalist_drain)
-	(dev, list);
-}
-
-/* =====================================================================
- *                    INTERRUPT MANAGEMENT
- *
- *      Allow crosstalk devices to establish interrupts
- */
-
-/*
- * Allocate resources required for an interrupt as specified in intr_desc.
- * Return resource handle in intr_hdl.
- */
-xtalk_intr_t
-xtalk_intr_alloc(devfs_handle_t dev,	/* which Crosstalk device */
-		 device_desc_t dev_desc,	/* device descriptor */
-		 devfs_handle_t owner_dev)
-{				/* owner of this interrupt */
-    return (xtalk_intr_t) DEV_FUNC(dev, intr_alloc)
-	(dev, dev_desc, owner_dev);
-}
-
-/*
- * Allocate resources required for an interrupt as specified in dev_desc.
- * Unconditionally setup resources to be non-threaded.
- * Return resource handle in intr_hdl.
- */
-xtalk_intr_t
-xtalk_intr_alloc_nothd(devfs_handle_t dev,	/* which Crosstalk device */
-		 	device_desc_t dev_desc,	/* device descriptor */
-		 	devfs_handle_t owner_dev)	/* owner of this interrupt */
-{
-    return (xtalk_intr_t) DEV_FUNC(dev, intr_alloc_nothd)
-	(dev, dev_desc, owner_dev);
-}
-
-/*
- * Free resources consumed by intr_alloc.
- */
-void
-xtalk_intr_free(xtalk_intr_t intr_hdl)
-{
-    INTR_FUNC(intr_hdl, intr_free)
-	(CAST_INTR(intr_hdl));
-}
-
-
-/*
- * Associate resources allocated with a previous xtalk_intr_alloc call with the
- * described handler, arg, name, etc.
- *
- * Returns 0 on success, returns <0 on failure.
- */
-int
-xtalk_intr_connect(xtalk_intr_t intr_hdl,	/* xtalk intr resource handle */
-		   xtalk_intr_setfunc_t setfunc,	/* func to set intr hw */
-		   void *setfunc_arg)	/* arg to setfunc */
-{
-    return INTR_FUNC(intr_hdl, intr_connect)
-	(CAST_INTR(intr_hdl), setfunc, setfunc_arg);
-}
-
-
-/*
- * Disassociate handler with the specified interrupt.
- */
-void
-xtalk_intr_disconnect(xtalk_intr_t intr_hdl)
-{
-    INTR_FUNC(intr_hdl, intr_disconnect)
-	(CAST_INTR(intr_hdl));
-}
-
-
-/*
- * Return a hwgraph vertex that represents the CPU currently
- * targeted by an interrupt.
- */
-devfs_handle_t
-xtalk_intr_cpu_get(xtalk_intr_t intr_hdl)
-{
-    return INTR_FUNC(intr_hdl, intr_cpu_get)
-	(CAST_INTR(intr_hdl));
-}
-
-
-/* =====================================================================
- *                    CONFIGURATION MANAGEMENT
- */
-
-/*
- * Startup a crosstalk provider
- */
-void
-xtalk_provider_startup(devfs_handle_t xtalk_provider)
-{
-    DEV_FUNC(xtalk_provider, provider_startup)
-	(xtalk_provider);
-}
-
-
-/*
- * Shutdown a crosstalk provider
- */
-void
-xtalk_provider_shutdown(devfs_handle_t xtalk_provider)
-{
-    DEV_FUNC(xtalk_provider, provider_shutdown)
-	(xtalk_provider);
-}
-
-/* 
- * Enable a device on a xtalk widget 
- */
-void
-xtalk_widgetdev_enable(devfs_handle_t xconn_vhdl, int devnum)
-{
-    DEV_FUNC(xconn_vhdl, widgetdev_enable) (xconn_vhdl, devnum);
-}
-
-/* 
- * Shutdown a device on a xtalk widget 
- */
-void
-xtalk_widgetdev_shutdown(devfs_handle_t xconn_vhdl, int devnum)
-{
-    DEV_FUNC(xconn_vhdl, widgetdev_shutdown) (xconn_vhdl, devnum);
-}
-
-int
-xtalk_dma_enabled(devfs_handle_t xconn_vhdl)
-{
-    return DEV_FUNC(xconn_vhdl, dma_enabled) (xconn_vhdl);
-}
-/*
- * Generic crosstalk functions, for use with all crosstalk providers
- * and all crosstalk devices.
- */
-
-/****** Generic crosstalk interrupt interfaces ******/
-devfs_handle_t
-xtalk_intr_dev_get(xtalk_intr_t xtalk_intr)
-{
-    return (xtalk_intr->xi_dev);
-}
-
-xwidgetnum_t
-xtalk_intr_target_get(xtalk_intr_t xtalk_intr)
-{
-    return (xtalk_intr->xi_target);
-}
-
-xtalk_intr_vector_t
-xtalk_intr_vector_get(xtalk_intr_t xtalk_intr)
-{
-    return (xtalk_intr->xi_vector);
-}
-
-iopaddr_t
-xtalk_intr_addr_get(struct xtalk_intr_s *xtalk_intr)
-{
-    return (xtalk_intr->xi_addr);
-}
-
-void                   *
-xtalk_intr_sfarg_get(xtalk_intr_t xtalk_intr)
-{
-    return (xtalk_intr->xi_sfarg);
-}
-
-/****** Generic crosstalk pio interfaces ******/
-devfs_handle_t
-xtalk_pio_dev_get(xtalk_piomap_t xtalk_piomap)
-{
-    return (xtalk_piomap->xp_dev);
-}
-
-xwidgetnum_t
-xtalk_pio_target_get(xtalk_piomap_t xtalk_piomap)
-{
-    return (xtalk_piomap->xp_target);
-}
-
-iopaddr_t
-xtalk_pio_xtalk_addr_get(xtalk_piomap_t xtalk_piomap)
-{
-    return (xtalk_piomap->xp_xtalk_addr);
-}
-
-ulong
-xtalk_pio_mapsz_get(xtalk_piomap_t xtalk_piomap)
-{
-    return (xtalk_piomap->xp_mapsz);
-}
-
-caddr_t
-xtalk_pio_kvaddr_get(xtalk_piomap_t xtalk_piomap)
-{
-    return (xtalk_piomap->xp_kvaddr);
-}
-
-
-/****** Generic crosstalk dma interfaces ******/
-devfs_handle_t
-xtalk_dma_dev_get(xtalk_dmamap_t xtalk_dmamap)
-{
-    return (xtalk_dmamap->xd_dev);
-}
-
-xwidgetnum_t
-xtalk_dma_target_get(xtalk_dmamap_t xtalk_dmamap)
-{
-    return (xtalk_dmamap->xd_target);
-}
-
-
-/****** Generic crosstalk widget information interfaces ******/
-
-/* xwidget_info_chk:
- * check to see if this vertex is a widget;
- * if so, return its widget_info (if any).
- * if not, return NULL.
- */
-xwidget_info_t
-xwidget_info_chk(devfs_handle_t xwidget)
-{
-    arbitrary_info_t        ainfo = 0;
-
-    hwgraph_info_get_LBL(xwidget, INFO_LBL_XWIDGET, &ainfo);
-    return (xwidget_info_t) ainfo;
-}
-
-
-xwidget_info_t
-xwidget_info_get(devfs_handle_t xwidget)
-{
-    xwidget_info_t          widget_info;
-
-    widget_info = (xwidget_info_t)
-	hwgraph_fastinfo_get(xwidget);
-
-#ifdef	LATER
-    if ((widget_info != NULL) &&
-	(widget_info->w_fingerprint != widget_info_fingerprint))
-#ifdef SUPPORT_PRINTING_V_FORMAT
-	PRINT_PANIC("%v bad xwidget_info", xwidget);
-#else
-	PRINT_PANIC("%x bad xwidget_info", xwidget);
-#endif
-#endif	/* LATER */
-
-    return (widget_info);
-}
-
-void
-xwidget_info_set(devfs_handle_t xwidget, xwidget_info_t widget_info)
-{
-    if (widget_info != NULL)
-	widget_info->w_fingerprint = widget_info_fingerprint;
-
-    hwgraph_fastinfo_set(xwidget, (arbitrary_info_t) widget_info);
-
-    /* Also, mark this vertex as an xwidget,
-     * and use the widget_info, so xwidget_info_chk
-     * can work (and be fairly efficient).
-     */
-    hwgraph_info_add_LBL(xwidget, INFO_LBL_XWIDGET,
-			 (arbitrary_info_t) widget_info);
-}
-
-devfs_handle_t
-xwidget_info_dev_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget_info");
-    return (xwidget_info->w_vertex);
-}
-
-xwidgetnum_t
-xwidget_info_id_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget_info");
-    return (xwidget_info->w_id);
-}
-
-
-devfs_handle_t
-xwidget_info_master_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget_info");
-    return (xwidget_info->w_master);
-}
-
-xwidgetnum_t
-xwidget_info_masterid_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget_info");
-    return (xwidget_info->w_masterid);
-}
-
-xwidget_part_num_t
-xwidget_info_part_num_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget_info");
-    return (xwidget_info->w_hwid.part_num);
-}
-
-xwidget_mfg_num_t
-xwidget_info_mfg_num_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget_info");
-    return (xwidget_info->w_hwid.mfg_num);
-}
-/* Extract the widget name from the widget information
- * for the xtalk widget.
- */
-char *
-xwidget_info_name_get(xwidget_info_t xwidget_info)
-{
-    if (xwidget_info == NULL)
-	panic("null xwidget info");
-    return(xwidget_info->w_name);
-}
-/****** Generic crosstalk initialization interfaces ******/
-
-/*
- * One-time initialization needed for systems that support crosstalk.
- */
-void
-xtalk_init(void)
-{
-    cdl_p                   cp;
-
-#if DEBUG && ATTACH_DEBUG
-    printf("xtalk_init\n");
-#endif
-    /* Allocate the registry.
-     * We might already have one.
-     * If we don't, go get one.
-     * MPness: someone might have
-     * set one up for us while we
-     * were not looking; use an atomic
-     * compare-and-swap to commit to
-     * using the new registry if and
-     * only if nobody else did first.
-     * If someone did get there first,
-     * toss the one we allocated back
-     * into the pool.
-     */
-    if (xtalk_registry == NULL) {
-	cp = cdl_new(EDGE_LBL_XIO, "part", "mfgr");
-	if (!compare_and_swap_ptr((void **) &xtalk_registry, NULL, (void *) cp)) {
-	    cdl_del(cp);
-	}
-    }
-    ASSERT(xtalk_registry != NULL);
-}
-
-/*
- * Associate a set of xtalk_provider functions with a vertex.
- */
-void
-xtalk_provider_register(devfs_handle_t provider, xtalk_provider_t *xtalk_fns)
-{
-    hwgraph_fastinfo_set(provider, (arbitrary_info_t) xtalk_fns);
-}
-
-/*
- * Disassociate a set of xtalk_provider functions with a vertex.
- */
-void
-xtalk_provider_unregister(devfs_handle_t provider)
-{
-    hwgraph_fastinfo_set(provider, (arbitrary_info_t)NULL);
-}
-
-/*
- * Obtain a pointer to the xtalk_provider functions for a specified Crosstalk
- * provider.
- */
-xtalk_provider_t       *
-xtalk_provider_fns_get(devfs_handle_t provider)
-{
-    return ((xtalk_provider_t *) hwgraph_fastinfo_get(provider));
-}
-
-/*
- * Announce a driver for a particular crosstalk part.
- * Returns 0 on success or -1 on failure.  Failure occurs if the
- * specified hardware already has a driver.
- */
-/*ARGSUSED4 */
-int
-xwidget_driver_register(xwidget_part_num_t part_num,
-			xwidget_mfg_num_t mfg_num,
-			char *driver_prefix,
-			unsigned flags)
-{
-    /* a driver's init routine could call
-     * xwidget_driver_register before the
-     * system calls xtalk_init; so, we
-     * make the call here.
-     */
-    if (xtalk_registry == NULL)
-	xtalk_init();
-
-    return cdl_add_driver(xtalk_registry,
-			  part_num, mfg_num,
-			  driver_prefix, flags, NULL);
-}
-
-/*
- * Inform xtalk infrastructure that a driver is no longer available for
- * handling any widgets.
- */
-void
-xwidget_driver_unregister(char *driver_prefix)
-{
-    /* before a driver calls unregister,
-     * it must have called registger; so we
-     * can assume we have a registry here.
-     */
-    ASSERT(xtalk_registry != NULL);
-
-    cdl_del_driver(xtalk_registry, driver_prefix, NULL);
-}
-
-/*
- * Call some function with each vertex that
- * might be one of this driver's attach points.
- */
-void
-xtalk_iterate(char *driver_prefix,
-	      xtalk_iter_f *func)
-{
-    ASSERT(xtalk_registry != NULL);
-
-    cdl_iterate(xtalk_registry, driver_prefix, (cdl_iter_f *)func);
-}
-
-/*
- * xwidget_register:
- *	Register a xtalk device (xwidget) by doing the following.
- *      -allocate and initialize xwidget_info data
- *      -allocate a hwgraph vertex with name based on widget number (id)
- *      -look up the widget's initialization function and call it,
- *      or remember the vertex for later initialization.
- *
- */
-int
-xwidget_register(xwidget_hwid_t hwid,		/* widget's hardware ID */
-		 devfs_handle_t 	widget,		/* widget to initialize */
-		 xwidgetnum_t 	id,		/* widget's target id (0..f) */
-		 devfs_handle_t 	master,		/* widget's master vertex */
-		 xwidgetnum_t 	targetid,	/* master's target id (9/a) */
-		 async_attach_t aa)
-{			
-    xwidget_info_t          widget_info;
-    char		    *s,devnm[MAXDEVNAME];
-
-    /* Allocate widget_info and associate it with widget vertex */
-    NEW(widget_info);
-
-    /* Initialize widget_info */
-    widget_info->w_vertex = widget;
-    widget_info->w_id = id;
-    widget_info->w_master = master;
-    widget_info->w_masterid = targetid;
-    widget_info->w_hwid = *hwid;	/* structure copy */
-    widget_info->w_efunc = 0;
-    widget_info->w_einfo = 0;
-    /*
-     * get the name of this xwidget vertex and keep the info.
-     * This is needed during errors and interupts, but as
-     * long as we have it, we can use it elsewhere.
-     */
-    s = dev_to_name(widget,devnm,MAXDEVNAME);
-    widget_info->w_name = kmalloc(strlen(s) + 1, GFP_KERNEL);
-    strcpy(widget_info->w_name,s);
-    
-    xwidget_info_set(widget, widget_info);
-
-    device_master_set(widget, master);
-
-    /* All the driver init routines (including
-     * xtalk_init) are called before we get into
-     * attaching devices, so we can assume we
-     * have a registry here.
-     */
-    ASSERT(xtalk_registry != NULL);
-
-    /* 
-     * Add pointer to async attach info -- tear down will be done when
-     * the particular descendant is done with the info.
-     */
-    if (aa)
-	    async_attach_add_info(widget, aa);
-
-    return cdl_add_connpt(xtalk_registry, hwid->part_num, hwid->mfg_num,
-                          widget, 0);
-}
-
-/*
- * xwidget_unregister :
- *	Unregister the xtalk device and detach all its hwgraph namespace.
- */
-int
-xwidget_unregister(devfs_handle_t widget)
-{
-    xwidget_info_t	widget_info;
-    xwidget_hwid_t	hwid;
-
-    /* Make sure that we have valid widget information initialized */
-    if (!(widget_info = xwidget_info_get(widget)))
-	return(1);
-
-    /* Remove the inventory information associated
-     * with the widget.
-     */
-    hwgraph_inventory_remove(widget, -1, -1, -1, -1, -1);
-    
-    hwid = &(widget_info->w_hwid);
-
-    cdl_del_connpt(xtalk_registry, hwid->part_num, hwid->mfg_num,
-                   widget, 0);
-
-    /* Clean out the xwidget information */
-    (void)kfree(widget_info->w_name);
-    BZERO((void *)widget_info, sizeof(widget_info));
-    DEL(widget_info);
-    
-    return(0);
-}
-
-/*
- * Issue a link reset to a widget.
- */
-void
-xwidget_reset(devfs_handle_t xwidget)
-{
-    xswitch_reset_link(xwidget);
-
-}
-
-
-void
-xwidget_gfx_reset(devfs_handle_t xwidget)
-{
-    xwidget_info_t info;
-
-    xswitch_reset_link(xwidget);
-    info = xwidget_info_get(xwidget);
-#ifdef LATER
-    ASSERT_ALWAYS(info != NULL);
-#endif
-
-    /*
-     * Enable this for other architectures once we add widget_reset to the
-     * xtalk provider interface.
-     */
-    DEV_FUNC(xtalk_provider, widget_reset)
-	(xwidget_info_master_get(info), xwidget_info_id_get(info));
-}
-
-#define ANON_XWIDGET_NAME	"No Name"	/* Default Widget Name */
-
-/* Get the canonical hwgraph  name of xtalk widget */
-char *
-xwidget_name_get(devfs_handle_t xwidget_vhdl)
-{
-	xwidget_info_t  info;
-
-	/* If we have a bogus widget handle then return
-	 * a default anonymous widget name.
-	 */
-	if (xwidget_vhdl == GRAPH_VERTEX_NONE)
-	    return(ANON_XWIDGET_NAME);
-	/* Read the widget name stored in the widget info
-	 * for the widget setup during widget initialization.
-	 */
-	info = xwidget_info_get(xwidget_vhdl);
-	ASSERT(info != NULL);
-	return(xwidget_info_name_get(info));
-}

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)