1 files changed, 0 insertions, 669 deletions

diff --git a/sys/amd64/amd64/busdma_machdep.c b/sys/amd64/amd64/busdma_machdep.c
deleted file mode 100644
index 30571e558e15..000000000000
--- a/sys/amd64/amd64/busdma_machdep.c
+++ /dev/null
@@ -1,669 +0,0 @@
-/*
- * Copyright (c) 1997, 1998 Justin T. Gibbs.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions, and the following disclaimer,
- *    without modification, immediately at the beginning of the file.
- * 2. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *      $Id: busdma_machdep.c,v 1.11 1998/10/13 08:24:33 dg Exp $
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-
-#include <vm/vm.h>
-#include <vm/vm_prot.h>
-#include <vm/vm_page.h>
-
-#include <machine/bus.h>
-#include <machine/md_var.h>
-
-#define MAX(a,b) (((a) > (b)) ? (a) : (b))
-#define MIN(a,b) (((a) < (b)) ? (a) : (b))
-#define MAX_BPAGES 128
-
-struct bus_dma_tag {
-	bus_dma_tag_t	  parent;
-	bus_size_t	  alignment;
-	bus_size_t	  boundary;
-	bus_addr_t	  lowaddr;
-	bus_addr_t	  highaddr;
-	bus_dma_filter_t *filter;
-	void		 *filterarg;
-	bus_size_t	  maxsize;
-	u_int		  nsegments;
-	bus_size_t	  maxsegsz;
-	int		  flags;
-	int		  ref_count;
-	int		  map_count;
-};
-
-struct bounce_page {
-	vm_offset_t	vaddr;		/* kva of bounce buffer */
-	bus_addr_t	busaddr;	/* Physical address */
-	vm_offset_t	datavaddr;	/* kva of client data */
-	bus_size_t	datacount;	/* client data count */
-	STAILQ_ENTRY(bounce_page) links;
-};
-
-int busdma_swi_pending;
-
-static STAILQ_HEAD(bp_list, bounce_page) bounce_page_list;
-static int free_bpages;
-static int reserved_bpages;
-static int active_bpages;
-static int total_bpages;
-static bus_addr_t bounce_lowaddr = BUS_SPACE_MAXADDR;
-
-struct bus_dmamap {
-	struct bp_list	       bpages;
-	int		       pagesneeded;
-	int		       pagesreserved;
-	bus_dma_tag_t	       dmat;
-	void		      *buf;		/* unmapped buffer pointer */
-	bus_size_t	       buflen;		/* unmapped buffer length */
-	bus_dmamap_callback_t *callback;
-	void		      *callback_arg;
-	STAILQ_ENTRY(bus_dmamap) links;
-};
-
-static STAILQ_HEAD(, bus_dmamap) bounce_map_waitinglist;
-static STAILQ_HEAD(, bus_dmamap) bounce_map_callbacklist;
-static struct bus_dmamap nobounce_dmamap;
-
-static int alloc_bounce_pages(bus_dma_tag_t dmat, u_int numpages);
-static int reserve_bounce_pages(bus_dma_tag_t dmat, bus_dmamap_t map);
-static vm_offset_t add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map,
-				   vm_offset_t vaddr, bus_size_t size);
-static void free_bounce_page(bus_dma_tag_t dmat, struct bounce_page *bpage);
-static __inline int run_filter(bus_dma_tag_t dmat, bus_addr_t paddr);
-
-static __inline int
-run_filter(bus_dma_tag_t dmat, bus_addr_t paddr)
-{
-	int retval;
-
-	retval = 0;
-	do {
-		if (paddr > dmat->lowaddr
-		 && paddr <= dmat->highaddr
-		 && (dmat->filter == NULL
-		  || (*dmat->filter)(dmat->filterarg, paddr) != 0))
-			retval = 1;
-
-		dmat = dmat->parent;		
-	} while (retval == 0 && dmat != NULL);
-	return (retval);
-}
-
-#define BUS_DMA_MIN_ALLOC_COMP BUS_DMA_BUS4
-/*
- * Allocate a device specific dma_tag.
- */
-int
-bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
-		   bus_size_t boundary, bus_addr_t lowaddr,
-		   bus_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 *dmat)
-{
-	bus_dma_tag_t newtag;
-	int error = 0;
-
-	/* Return a NULL tag on failure */
-	*dmat = NULL;
-
-	newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_DEVBUF, M_NOWAIT);
-	if (newtag == NULL)
-		return (ENOMEM);
-
-	newtag->parent = parent;
-	newtag->boundary = boundary;
-	newtag->lowaddr = trunc_page((vm_offset_t)lowaddr) + (PAGE_SIZE - 1);
-	newtag->highaddr = trunc_page((vm_offset_t)highaddr) + (PAGE_SIZE - 1);
-	newtag->filter = filter;
-	newtag->filterarg = filterarg;
-	newtag->maxsize = maxsize;
-	newtag->nsegments = nsegments;
-	newtag->maxsegsz = maxsegsz;
-	newtag->flags = flags;
-	newtag->ref_count = 1; /* Count ourself */
-	newtag->map_count = 0;
-	
-	/* Take into account any restrictions imposed by our parent tag */
-	if (parent != NULL) {
-		newtag->lowaddr = MIN(parent->lowaddr, newtag->lowaddr);
-		newtag->highaddr = MAX(parent->highaddr, newtag->highaddr);
-		/*
-		 * XXX Not really correct??? Probably need to honor boundary
-		 *     all the way up the inheritence chain.
-		 */
-		newtag->boundary = MAX(parent->boundary, newtag->boundary);
-		if (newtag->filter == NULL) {
-			/*
-			 * Short circuit looking at our parent directly
-			 * since we have encapsulated all of its information
-			 */
-			newtag->filter = parent->filter;
-			newtag->filterarg = parent->filterarg;
-			newtag->parent = parent->parent;
-		}
-		if (newtag->parent != NULL) {
-			parent->ref_count++;
-		}
-	}
-	
-	if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
-		/* Must bounce */
-
-		if (lowaddr > bounce_lowaddr) {
-			/*
-			 * Go through the pool and kill any pages
-			 * that don't reside below lowaddr.
-			 */
-			panic("bus_dma_tag_create: page reallocation "
-			      "not implemented");
-		}
-		if (ptoa(total_bpages) < maxsize) {
-			int pages;
-
-			pages = atop(maxsize) - total_bpages;
-
-			/* Add pages to our bounce pool */
-			if (alloc_bounce_pages(newtag, pages) < pages)
-				error = ENOMEM;
-		}
-		/* Performed initial allocation */
-		newtag->flags |= BUS_DMA_MIN_ALLOC_COMP;
-	}
-	
-	if (error != 0) {
-		free(newtag, M_DEVBUF);
-	} else {
-		*dmat = newtag;
-	}
-	return (error);
-}
-
-int
-bus_dma_tag_destroy(bus_dma_tag_t dmat)
-{
-	if (dmat != NULL) {
-
-		if (dmat->map_count != 0)
-			return (EBUSY);
-
-		while (dmat != NULL) {
-			bus_dma_tag_t parent;
-
-			parent = dmat->parent;
-			dmat->ref_count--;
-			if (dmat->ref_count == 0) {
-				free(dmat, M_DEVBUF);
-				/*
-				 * Last reference count, so
-				 * release our reference
-				 * count on our parent.
-				 */
-				dmat = parent;
-			} else
-				dmat = NULL;
-		}
-	}
-	return (0);
-}
-
-/*
- * Allocate a handle for mapping from kva/uva/physical
- * address space into bus device space.
- */
-int
-bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
-{
-	int error;
-
-	error = 0;
-
-	if (dmat->lowaddr < ptoa(Maxmem)) {
-		/* Must bounce */
-		int maxpages;
-
-		*mapp = (bus_dmamap_t)malloc(sizeof(**mapp), M_DEVBUF,
-					     M_NOWAIT);
-		if (*mapp == NULL) {
-			return (ENOMEM);
-		} else {
-			/* Initialize the new map */
-			bzero(*mapp, sizeof(**mapp));
-			STAILQ_INIT(&((*mapp)->bpages));
-		}
-		/*
-		 * Attempt to add pages to our pool on a per-instance
-		 * basis up to a sane limit.
-		 */
-		maxpages = MIN(MAX_BPAGES, Maxmem - atop(dmat->lowaddr));
-		if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0
-		 || (dmat->map_count > 0
-		  && total_bpages < maxpages)) {
-			int pages;
-
-			if (dmat->lowaddr > bounce_lowaddr) {
-				/*
-				 * Go through the pool and kill any pages
-				 * that don't reside below lowaddr.
-				 */
-				panic("bus_dmamap_create: page reallocation "
-				      "not implemented");
-			}
-			pages = atop(dmat->maxsize);
-			pages = MIN(maxpages - total_bpages, pages);
-			error = alloc_bounce_pages(dmat, pages);
-
-			if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) {
-				if (error == 0)
-					dmat->flags |= BUS_DMA_MIN_ALLOC_COMP;
-			} else {
-				error = 0;
-			}
-		}
-	} else {
-		*mapp = NULL;
-	}
-	if (error == 0)
-		dmat->map_count++;
-	return (error);
-}
-
-/*
- * Destroy a handle for mapping from kva/uva/physical
- * address space into bus device space.
- */
-int
-bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
-{
-	if (map != NULL) {
-		if (STAILQ_FIRST(&map->bpages) != NULL)
-			return (EBUSY);
-		free(map, M_DEVBUF);
-	}
-	dmat->map_count--;
-	return (0);
-}
-
-
-/*
- * Allocate a piece of memory that can be efficiently mapped into
- * bus device space based on the constraints lited in the dma tag.
- * A dmamap to for use with dmamap_load is also allocated.
- */
-int
-bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
-		 bus_dmamap_t *mapp)
-{
-	/* If we succeed, no mapping/bouncing will be required */
-	*mapp = NULL;
-
-	if ((dmat->maxsize <= PAGE_SIZE) && dmat->lowaddr >= ptoa(Maxmem)) {
-		*vaddr = malloc(dmat->maxsize, M_DEVBUF,
-				(flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK);
-	} else {
-		/*
-		 * XXX Use Contigmalloc until it is merged into this facility
-		 *     and handles multi-seg allocations.  Nobody is doing
-		 *     multi-seg allocations yet though.
-		 */
-		*vaddr = contigmalloc(dmat->maxsize, M_DEVBUF,
-				      (flags & BUS_DMA_NOWAIT)
-				      ? M_NOWAIT : M_WAITOK,
-				      0ul, dmat->lowaddr, 1ul, dmat->boundary);
-	}
-	if (*vaddr == NULL)
-		return (ENOMEM);
-	return (0);
-}
-
-/*
- * Free a piece of memory and it's allociated dmamap, that was allocated
- * via bus_dmamem_alloc.
- */
-void
-bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
-{
-	/*
-	 * dmamem does not need to be bounced, so the map should be
-	 * NULL
-	 */
-	if (map != &nobounce_dmamap)
-		panic("bus_dmamem_free: Invalid map freed\n");
-	/* XXX There is no "contigfree" and "free" doesn't work */
-	if ((dmat->maxsize <= PAGE_SIZE) && dmat->lowaddr >= ptoa(Maxmem))
-		free(vaddr, M_DEVBUF);
-}
-
-#define BUS_DMAMAP_NSEGS ((BUS_SPACE_MAXSIZE / PAGE_SIZE) + 1)
-
-/*
- * Map the buffer buf into bus space using the dmamap map.
- */
-int
-bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
-		bus_size_t buflen, bus_dmamap_callback_t *callback,
-		void *callback_arg, int flags)
-{
-	vm_offset_t		vaddr;
-	vm_offset_t		paddr;
-#ifdef __GNUC__
-	bus_dma_segment_t	dm_segments[dmat->nsegments];
-#else
-	bus_dma_segment_t	dm_segments[BUS_DMAMAP_NSEGS];
-#endif
-	bus_dma_segment_t      *sg;
-	int			seg;
-	int			error;
-
-	if (map == NULL)
-		map = &nobounce_dmamap;
-
-	error = 0;
-	/*
-	 * If we are being called during a callback, pagesneeded will
-	 * be non-zero, so we can avoid doing the work twice.
-	 */
-	if (dmat->lowaddr < ptoa(Maxmem) && map->pagesneeded == 0) {
-		vm_offset_t	vendaddr;
-
-		/*
-		 * Count the number of bounce pages
-		 * needed in order to complete this transfer
-		 */
-		vaddr = trunc_page((vm_offset_t)buf);
-		vendaddr = (vm_offset_t)buf + buflen;
-
-		while (vaddr < vendaddr) {
-			paddr = pmap_kextract(vaddr);
-			if (run_filter(dmat, paddr) != 0) {
-
-				map->pagesneeded++;
-			}
-			vaddr += PAGE_SIZE;
-		}
-	}
-
-	/* Reserve Necessary Bounce Pages */
-	if (map->pagesneeded != 0) {
-		int s;
-
-		s = splhigh();
-	 	if (reserve_bounce_pages(dmat, map) != 0) {
-
-			/* Queue us for resources */
-			map->dmat = dmat;
-			map->buf = buf;
-			map->buflen = buflen;
-			map->callback = callback;
-			map->callback_arg = callback_arg;
-
-			STAILQ_INSERT_TAIL(&bounce_map_waitinglist, map, links);
-			splx(s);
-
-			return (EINPROGRESS);
-		}
-		splx(s);
-	}
-
-	vaddr = (vm_offset_t)buf;
-	sg = &dm_segments[0];
-	seg = 1;
-	sg->ds_len = 0;
-
-	{
-		/*
-		 * note: nextpaddr not used on first loop
-		 */
-		vm_offset_t	nextpaddr = 0;
-
-		do {
-			bus_size_t	size;
-
-			paddr = pmap_kextract(vaddr);
-			size = PAGE_SIZE - (paddr & PAGE_MASK);
-			if (size > buflen)
-				size = buflen;
-
-			if (map->pagesneeded != 0
-			 && run_filter(dmat, paddr)) {
-				paddr = add_bounce_page(dmat, map, 
-				    vaddr, size);
-			}
-
-			if (sg->ds_len == 0) {
-				sg->ds_addr = paddr;
-				sg->ds_len = size;
-			} else if (paddr == nextpaddr) {
-				sg->ds_len += size;
-			} else {
-				/* Go to the next segment */
-				sg++;
-				seg++;
-				if (seg > dmat->nsegments)
-					break;
-				sg->ds_addr = paddr;
-				sg->ds_len = size;
-			}
-			vaddr += size;
-			nextpaddr = paddr + size;
-			buflen -= size;
-		} while (buflen > 0);
-	}
-
-	if (buflen != 0) {
-		printf("bus_dmamap_load: Too many segs! buf_len = 0x%lx\n",
-		       (u_long)buflen);
-		error = EFBIG;
-	}
-
-	(*callback)(callback_arg, dm_segments, seg, error);
-
-	return (0);
-}
-
-/*
- * Release the mapping held by map.
- */
-void
-_bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
-{
-	struct bounce_page *bpage;
-
-	while ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) {
-		STAILQ_REMOVE_HEAD(&map->bpages, links);
-		free_bounce_page(dmat, bpage);
-	}
-}
-
-void
-_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
-{
-	struct bounce_page *bpage;
-
-	if ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) {
-		
-		/*
-		 * Handle data bouncing.  We might also
-		 * want to add support for invalidating
-		 * the caches on broken hardware
-		 */
-		switch (op) {
-		case BUS_DMASYNC_PREWRITE:
-			while (bpage != NULL) {
-				bcopy((void *)bpage->datavaddr,
-				      (void *)bpage->vaddr,
-				      bpage->datacount);
-				bpage = STAILQ_NEXT(bpage, links);
-			}
-			break;
-
-		case BUS_DMASYNC_POSTREAD:
-			while (bpage != NULL) {
-				bcopy((void *)bpage->vaddr,
-				      (void *)bpage->datavaddr,
-				      bpage->datacount);
-				bpage = STAILQ_NEXT(bpage, links);
-			}
-			break;
-		case BUS_DMASYNC_PREREAD:
-		case BUS_DMASYNC_POSTWRITE:
-			/* No-ops */
-			break;
-		}
-	}
-}
-
-static int
-alloc_bounce_pages(bus_dma_tag_t dmat, u_int numpages)
-{
-	int count;
-
-	count = 0;
-	if (total_bpages == 0) {
-		STAILQ_INIT(&bounce_page_list);
-		STAILQ_INIT(&bounce_map_waitinglist);
-		STAILQ_INIT(&bounce_map_callbacklist);
-	}
-	
-	while (numpages > 0) {
-		struct bounce_page *bpage;
-		int s;
-
-		bpage = (struct bounce_page *)malloc(sizeof(*bpage), M_DEVBUF,
-						     M_NOWAIT);
-
-		if (bpage == NULL)
-			break;
-		bzero(bpage, sizeof(*bpage));
-		bpage->vaddr = (vm_offset_t)contigmalloc(PAGE_SIZE, M_DEVBUF,
-							 M_NOWAIT, 0ul,
-							 dmat->lowaddr,
-							 PAGE_SIZE,
-							 0);
-		if (bpage->vaddr == NULL) {
-			free(bpage, M_DEVBUF);
-			break;
-		}
-		bpage->busaddr = pmap_kextract(bpage->vaddr);
-		s = splhigh();
-		STAILQ_INSERT_TAIL(&bounce_page_list, bpage, links);
-		total_bpages++;
-		free_bpages++;
-		splx(s);
-		count++;
-		numpages--;
-	}
-	return (count);
-}
-
-static int
-reserve_bounce_pages(bus_dma_tag_t dmat, bus_dmamap_t map)
-{
-	int pages;
-
-	pages = MIN(free_bpages, map->pagesneeded - map->pagesreserved);
-	free_bpages -= pages;
-	reserved_bpages += pages;
-	map->pagesreserved += pages;
-	pages = map->pagesneeded - map->pagesreserved;
-
-	return (pages);
-}
-
-static vm_offset_t
-add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr,
-		bus_size_t size)
-{
-	int s;
-	struct bounce_page *bpage;
-
-	if (map->pagesneeded == 0)
-		panic("add_bounce_page: map doesn't need any pages");
-	map->pagesneeded--;
-
-	if (map->pagesreserved == 0)
-		panic("add_bounce_page: map doesn't need any pages");
-	map->pagesreserved--;
-
-	s = splhigh();
-	bpage = STAILQ_FIRST(&bounce_page_list);
-	if (bpage == NULL)
-		panic("add_bounce_page: free page list is empty");
-
-	STAILQ_REMOVE_HEAD(&bounce_page_list, links);
-	reserved_bpages--;
-	active_bpages++;
-	splx(s);
-
-	bpage->datavaddr = vaddr;
-	bpage->datacount = size;
-	STAILQ_INSERT_TAIL(&(map->bpages), bpage, links);
-	return (bpage->busaddr);
-}
-
-static void
-free_bounce_page(bus_dma_tag_t dmat, struct bounce_page *bpage)
-{
-	int s;
-	struct bus_dmamap *map;
-
-	bpage->datavaddr = 0;
-	bpage->datacount = 0;
-
-	s = splhigh();
-	STAILQ_INSERT_HEAD(&bounce_page_list, bpage, links);
-	free_bpages++;
-	active_bpages--;
-	if ((map = STAILQ_FIRST(&bounce_map_waitinglist)) != NULL) {
-		if (reserve_bounce_pages(map->dmat, map) == 0) {
-			STAILQ_REMOVE_HEAD(&bounce_map_waitinglist, links);
-			STAILQ_INSERT_TAIL(&bounce_map_callbacklist,
-					   map, links);
-			busdma_swi_pending = 1;
-			setsoftvm();
-		}
-	}
-	splx(s);
-}
-
-void
-busdma_swi()
-{
-	int s;
-	struct bus_dmamap *map;
-
-	s = splhigh();
-	while ((map = STAILQ_FIRST(&bounce_map_callbacklist)) != NULL) {
-		STAILQ_REMOVE_HEAD(&bounce_map_callbacklist, links);
-		splx(s);
-		bus_dmamap_load(map->dmat, map, map->buf, map->buflen,
-				map->callback, map->callback_arg, /*flags*/0);
-		s = splhigh();
-	}
-	splx(s);
-}