git: 029abd3b2987 - main - Remove discarded mips source.
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Date: Fri, 31 Dec 2021 04:13:58 UTC
The branch main has been updated by dougm:
URL: https://cgit.FreeBSD.org/src/commit/?id=029abd3b2987ac60e608753cc106e1e78f08c9d7
commit 029abd3b2987ac60e608753cc106e1e78f08c9d7
Author: Doug Moore <dougm@FreeBSD.org>
AuthorDate: 2021-12-31 04:12:46 +0000
Commit: Doug Moore <dougm@FreeBSD.org>
CommitDate: 2021-12-31 04:12:46 +0000
Remove discarded mips source.
---
sys/mips/mips/busdma_machdep.c | 1545 ----------------------------------------
1 file changed, 1545 deletions(-)
diff --git a/sys/mips/mips/busdma_machdep.c b/sys/mips/mips/busdma_machdep.c
deleted file mode 100644
index 348c1d98c328..000000000000
--- a/sys/mips/mips/busdma_machdep.c
+++ /dev/null
@@ -1,1545 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2006 Oleksandr Tymoshenko
- * 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.
- *
- * From i386/busdma_machdep.c,v 1.26 2002/04/19 22:58:09 alfred
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * MIPS bus dma support routines
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/bus.h>
-#include <sys/busdma_bufalloc.h>
-#include <sys/interrupt.h>
-#include <sys/lock.h>
-#include <sys/proc.h>
-#include <sys/memdesc.h>
-#include <sys/mutex.h>
-#include <sys/ktr.h>
-#include <sys/kernel.h>
-#include <sys/sysctl.h>
-#include <sys/uio.h>
-
-#include <vm/uma.h>
-#include <vm/vm.h>
-#include <vm/vm_extern.h>
-#include <vm/vm_kern.h>
-#include <vm/vm_page.h>
-#include <vm/vm_phys.h>
-#include <vm/vm_map.h>
-
-#include <machine/atomic.h>
-#include <machine/bus.h>
-#include <machine/cache.h>
-#include <machine/cpufunc.h>
-#include <machine/cpuinfo.h>
-#include <machine/md_var.h>
-
-#define MAX_BPAGES 64
-#define BUS_DMA_COULD_BOUNCE BUS_DMA_BUS3
-#define BUS_DMA_MIN_ALLOC_COMP BUS_DMA_BUS4
-
-/*
- * On XBurst cores from Ingenic, cache-line writeback is local
- * only, unless accompanied by invalidation. Invalidations force
- * dirty line writeout and invalidation requests forwarded to
- * other cores if other cores have the cache line dirty.
- */
-#if defined(SMP) && defined(CPU_XBURST)
-#define BUS_DMA_FORCE_WBINV
-#endif
-
-struct bounce_zone;
-
-struct bus_dma_tag {
- bus_dma_tag_t parent;
- bus_size_t alignment;
- bus_addr_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;
- bus_dma_lock_t *lockfunc;
- void *lockfuncarg;
- bus_dma_segment_t *segments;
- struct bounce_zone *bounce_zone;
-};
-
-struct bounce_page {
- vm_offset_t vaddr; /* kva of bounce buffer */
- vm_offset_t vaddr_nocache; /* kva of bounce buffer uncached */
- bus_addr_t busaddr; /* Physical address */
- vm_offset_t datavaddr; /* kva of client data */
- bus_addr_t dataaddr; /* client physical address */
- bus_size_t datacount; /* client data count */
- STAILQ_ENTRY(bounce_page) links;
-};
-
-struct sync_list {
- vm_offset_t vaddr; /* kva of bounce buffer */
- bus_addr_t busaddr; /* Physical address */
- bus_size_t datacount; /* client data count */
-};
-
-struct bounce_zone {
- STAILQ_ENTRY(bounce_zone) links;
- STAILQ_HEAD(bp_list, bounce_page) bounce_page_list;
- int total_bpages;
- int free_bpages;
- int reserved_bpages;
- int active_bpages;
- int total_bounced;
- int total_deferred;
- int map_count;
- bus_size_t alignment;
- bus_addr_t lowaddr;
- char zoneid[8];
- char lowaddrid[20];
- struct sysctl_ctx_list sysctl_tree;
- struct sysctl_oid *sysctl_tree_top;
-};
-
-static struct mtx bounce_lock;
-static int total_bpages;
-static int busdma_zonecount;
-static STAILQ_HEAD(, bounce_zone) bounce_zone_list;
-static void *busdma_ih;
-
-static SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0,
- "Busdma parameters");
-SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0,
- "Total bounce pages");
-
-#define DMAMAP_UNCACHEABLE 0x08
-#define DMAMAP_CACHE_ALIGNED 0x10
-
-struct bus_dmamap {
- struct bp_list bpages;
- int pagesneeded;
- int pagesreserved;
- bus_dma_tag_t dmat;
- struct memdesc mem;
- int flags;
- TAILQ_ENTRY(bus_dmamap) freelist;
- STAILQ_ENTRY(bus_dmamap) links;
- bus_dmamap_callback_t *callback;
- void *callback_arg;
- int sync_count;
- struct sync_list *slist;
-};
-
-static STAILQ_HEAD(, bus_dmamap) bounce_map_waitinglist;
-static STAILQ_HEAD(, bus_dmamap) bounce_map_callbacklist;
-
-static void init_bounce_pages(void *dummy);
-static int alloc_bounce_zone(bus_dma_tag_t dmat);
-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,
- int commit);
-static bus_addr_t add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map,
- vm_offset_t vaddr, bus_addr_t addr,
- bus_size_t size);
-static void free_bounce_page(bus_dma_tag_t dmat, struct bounce_page *bpage);
-
-/* Default tag, as most drivers provide no parent tag. */
-bus_dma_tag_t mips_root_dma_tag;
-
-static uma_zone_t dmamap_zone; /* Cache of struct bus_dmamap items */
-
-static busdma_bufalloc_t coherent_allocator; /* Cache of coherent buffers */
-static busdma_bufalloc_t standard_allocator; /* Cache of standard buffers */
-
-MALLOC_DEFINE(M_BUSDMA, "busdma", "busdma metadata");
-MALLOC_DEFINE(M_BOUNCE, "bounce", "busdma bounce pages");
-
-/*
- * This is the ctor function passed to uma_zcreate() for the pool of dma maps.
- * It'll need platform-specific changes if this code is copied.
- */
-static int
-dmamap_ctor(void *mem, int size, void *arg, int flags)
-{
- bus_dmamap_t map;
- bus_dma_tag_t dmat;
-
- map = (bus_dmamap_t)mem;
- dmat = (bus_dma_tag_t)arg;
-
- dmat->map_count++;
-
- bzero(map, sizeof(*map));
- map->dmat = dmat;
- STAILQ_INIT(&map->bpages);
-
- return (0);
-}
-
-/*
- * This is the dtor function passed to uma_zcreate() for the pool of dma maps.
- * It may need platform-specific changes if this code is copied .
- */
-static void
-dmamap_dtor(void *mem, int size, void *arg)
-{
- bus_dmamap_t map;
-
- map = (bus_dmamap_t)mem;
-
- map->dmat->map_count--;
-}
-
-static void
-busdma_init(void *dummy)
-{
-
- /* Create a cache of maps for bus_dmamap_create(). */
- dmamap_zone = uma_zcreate("dma maps", sizeof(struct bus_dmamap),
- dmamap_ctor, dmamap_dtor, NULL, NULL, UMA_ALIGN_PTR, 0);
-
- /* Create a cache of buffers in standard (cacheable) memory. */
- standard_allocator = busdma_bufalloc_create("buffer",
- mips_dcache_max_linesize, /* minimum_alignment */
- NULL, /* uma_alloc func */
- NULL, /* uma_free func */
- 0); /* uma_zcreate_flags */
-
- /*
- * Create a cache of buffers in uncacheable memory, to implement the
- * BUS_DMA_COHERENT flag.
- */
- coherent_allocator = busdma_bufalloc_create("coherent",
- mips_dcache_max_linesize, /* minimum_alignment */
- busdma_bufalloc_alloc_uncacheable,
- busdma_bufalloc_free_uncacheable,
- 0); /* uma_zcreate_flags */
-}
-SYSINIT(busdma, SI_SUB_KMEM, SI_ORDER_FOURTH, busdma_init, NULL);
-
-/*
- * Return true if a match is made.
- *
- * To find a match walk the chain of bus_dma_tag_t's looking for 'paddr'.
- *
- * If paddr is within the bounds of the dma tag then call the filter callback
- * to check for a match, if there is no filter callback then assume a match.
- */
-static int
-run_filter(bus_dma_tag_t dmat, bus_addr_t paddr)
-{
- int retval;
-
- retval = 0;
-
- do {
- if (((paddr > dmat->lowaddr && paddr <= dmat->highaddr)
- || !vm_addr_align_ok(paddr, dmat->alignment))
- && (dmat->filter == NULL
- || (*dmat->filter)(dmat->filterarg, paddr) != 0))
- retval = 1;
-
- dmat = dmat->parent;
- } while (retval == 0 && dmat != NULL);
- return (retval);
-}
-
-/*
- * Check to see if the specified page is in an allowed DMA range.
- */
-
-static __inline int
-_bus_dma_can_bounce(vm_offset_t lowaddr, vm_offset_t highaddr)
-{
- int i;
- for (i = 0; phys_avail[i] && phys_avail[i + 1]; i += 2) {
- if ((lowaddr >= phys_avail[i] && lowaddr <= phys_avail[i + 1])
- || (lowaddr < phys_avail[i] &&
- highaddr > phys_avail[i]))
- return (1);
- }
- return (0);
-}
-
-/*
- * Convenience function for manipulating driver locks from busdma (during
- * busdma_swi, for example).
- */
-void
-busdma_lock_mutex(void *arg, bus_dma_lock_op_t op)
-{
- struct mtx *dmtx;
-
- dmtx = (struct mtx *)arg;
- switch (op) {
- case BUS_DMA_LOCK:
- mtx_lock(dmtx);
- break;
- case BUS_DMA_UNLOCK:
- mtx_unlock(dmtx);
- break;
- default:
- panic("Unknown operation 0x%x for busdma_lock_mutex!", op);
- }
-}
-
-/*
- * dflt_lock should never get called. It gets put into the dma tag when
- * lockfunc == NULL, which is only valid if the maps that are associated
- * with the tag are meant to never be defered.
- * XXX Should have a way to identify which driver is responsible here.
- */
-static void
-dflt_lock(void *arg, bus_dma_lock_op_t op)
-{
-#ifdef INVARIANTS
- panic("driver error: busdma dflt_lock called");
-#else
- printf("DRIVER_ERROR: busdma dflt_lock called\n");
-#endif
-}
-
-static __inline bus_dmamap_t
-_busdma_alloc_dmamap(bus_dma_tag_t dmat)
-{
- struct sync_list *slist;
- bus_dmamap_t map;
-
- slist = malloc(sizeof(*slist) * dmat->nsegments, M_BUSDMA, M_NOWAIT);
- if (slist == NULL)
- return (NULL);
- map = uma_zalloc_arg(dmamap_zone, dmat, M_NOWAIT);
- if (map != NULL)
- map->slist = slist;
- else
- free(slist, M_BUSDMA);
- return (map);
-}
-
-static __inline void
-_busdma_free_dmamap(bus_dmamap_t map)
-{
-
- free(map->slist, M_BUSDMA);
- uma_zfree(dmamap_zone, map);
-}
-
-/*
- * Allocate a device specific dma_tag.
- */
-#define SEG_NB 1024
-
-int
-bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
- bus_addr_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_lock_t *lockfunc,
- void *lockfuncarg, bus_dma_tag_t *dmat)
-{
- bus_dma_tag_t newtag;
- int error = 0;
- /* Return a NULL tag on failure */
- *dmat = NULL;
- if (!parent)
- parent = mips_root_dma_tag;
-
- newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_BUSDMA, M_NOWAIT);
- if (newtag == NULL) {
- CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d",
- __func__, newtag, 0, error);
- return (ENOMEM);
- }
-
- newtag->parent = parent;
- newtag->alignment = alignment;
- 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;
- if (cpuinfo.cache_coherent_dma)
- newtag->flags |= BUS_DMA_COHERENT;
- newtag->ref_count = 1; /* Count ourself */
- newtag->map_count = 0;
- if (lockfunc != NULL) {
- newtag->lockfunc = lockfunc;
- newtag->lockfuncarg = lockfuncarg;
- } else {
- newtag->lockfunc = dflt_lock;
- newtag->lockfuncarg = NULL;
- }
- newtag->segments = NULL;
-
- /*
- * 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);
- if (newtag->boundary == 0)
- newtag->boundary = parent->boundary;
- else if (parent->boundary != 0)
- newtag->boundary =
- MIN(parent->boundary, newtag->boundary);
- if ((newtag->filter != NULL) ||
- ((parent->flags & BUS_DMA_COULD_BOUNCE) != 0))
- newtag->flags |= BUS_DMA_COULD_BOUNCE;
- 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)
- atomic_add_int(&parent->ref_count, 1);
- }
- if (_bus_dma_can_bounce(newtag->lowaddr, newtag->highaddr)
- || newtag->alignment > 1)
- newtag->flags |= BUS_DMA_COULD_BOUNCE;
-
- if (((newtag->flags & BUS_DMA_COULD_BOUNCE) != 0) &&
- (flags & BUS_DMA_ALLOCNOW) != 0) {
- struct bounce_zone *bz;
-
- /* Must bounce */
-
- if ((error = alloc_bounce_zone(newtag)) != 0) {
- free(newtag, M_BUSDMA);
- return (error);
- }
- bz = newtag->bounce_zone;
-
- if (ptoa(bz->total_bpages) < maxsize) {
- int pages;
-
- pages = atop(maxsize) - bz->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;
- } else
- newtag->bounce_zone = NULL;
- if (error != 0)
- free(newtag, M_BUSDMA);
- else
- *dmat = newtag;
- CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d",
- __func__, newtag, (newtag != NULL ? newtag->flags : 0), error);
-
- return (error);
-}
-
-void
-bus_dma_template_clone(bus_dma_template_t *t, bus_dma_tag_t dmat)
-{
-
- if (t == NULL || dmat == NULL)
- return;
-
- t->parent = dmat->parent;
- t->alignment = dmat->alignment;
- t->boundary = dmat->boundary;
- t->lowaddr = dmat->lowaddr;
- t->highaddr = dmat->highaddr;
- t->maxsize = dmat->maxsize;
- t->nsegments = dmat->nsegments;
- t->maxsegsize = dmat->maxsegsz;
- t->flags = dmat->flags;
- t->lockfunc = dmat->lockfunc;
- t->lockfuncarg = dmat->lockfuncarg;
-}
-
-int
-bus_dma_tag_set_domain(bus_dma_tag_t dmat, int domain)
-{
-
- return (0);
-}
-
-int
-bus_dma_tag_destroy(bus_dma_tag_t dmat)
-{
-#ifdef KTR
- bus_dma_tag_t dmat_copy = dmat;
-#endif
-
- if (dmat != NULL) {
- if (dmat->map_count != 0)
- return (EBUSY);
-
- while (dmat != NULL) {
- bus_dma_tag_t parent;
-
- parent = dmat->parent;
- atomic_subtract_int(&dmat->ref_count, 1);
- if (dmat->ref_count == 0) {
- if (dmat->segments != NULL)
- free(dmat->segments, M_BUSDMA);
- free(dmat, M_BUSDMA);
- /*
- * Last reference count, so
- * release our reference
- * count on our parent.
- */
- dmat = parent;
- } else
- dmat = NULL;
- }
- }
- CTR2(KTR_BUSDMA, "%s tag %p", __func__, dmat_copy);
-
- return (0);
-}
-
-#include <sys/kdb.h>
-/*
- * 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)
-{
- bus_dmamap_t newmap;
- int error = 0;
-
- if (dmat->segments == NULL) {
- dmat->segments = (bus_dma_segment_t *)malloc(
- sizeof(bus_dma_segment_t) * dmat->nsegments, M_BUSDMA,
- M_NOWAIT);
- if (dmat->segments == NULL) {
- CTR3(KTR_BUSDMA, "%s: tag %p error %d",
- __func__, dmat, ENOMEM);
- return (ENOMEM);
- }
- }
-
- newmap = _busdma_alloc_dmamap(dmat);
- if (newmap == NULL) {
- CTR3(KTR_BUSDMA, "%s: tag %p error %d", __func__, dmat, ENOMEM);
- return (ENOMEM);
- }
- *mapp = newmap;
-
- /*
- * Bouncing might be required if the driver asks for an active
- * exclusion region, a data alignment that is stricter than 1, and/or
- * an active address boundary.
- */
- if (dmat->flags & BUS_DMA_COULD_BOUNCE) {
- /* Must bounce */
- struct bounce_zone *bz;
- int maxpages;
-
- if (dmat->bounce_zone == NULL) {
- if ((error = alloc_bounce_zone(dmat)) != 0) {
- _busdma_free_dmamap(newmap);
- *mapp = NULL;
- return (error);
- }
- }
- bz = dmat->bounce_zone;
-
- /* Initialize the new map */
- STAILQ_INIT(&((*mapp)->bpages));
-
- /*
- * Attempt to add pages to our pool on a per-instance
- * basis up to a sane limit.
- */
- maxpages = MAX_BPAGES;
- if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0
- || (bz->map_count > 0 && bz->total_bpages < maxpages)) {
- int pages;
-
- pages = MAX(atop(dmat->maxsize), 1);
- pages = MIN(maxpages - bz->total_bpages, pages);
- pages = MAX(pages, 1);
- if (alloc_bounce_pages(dmat, pages) < pages)
- error = ENOMEM;
-
- if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) {
- if (error == 0)
- dmat->flags |= BUS_DMA_MIN_ALLOC_COMP;
- } else {
- error = 0;
- }
- }
- bz->map_count++;
- }
-
- CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d",
- __func__, dmat, dmat->flags, error);
-
- return (0);
-}
-
-/*
- * 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 (STAILQ_FIRST(&map->bpages) != NULL || map->sync_count != 0) {
- CTR3(KTR_BUSDMA, "%s: tag %p error %d",
- __func__, dmat, EBUSY);
- return (EBUSY);
- }
- if (dmat->bounce_zone)
- dmat->bounce_zone->map_count--;
- _busdma_free_dmamap(map);
- CTR2(KTR_BUSDMA, "%s: tag %p error 0", __func__, dmat);
- 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** vaddrp, int flags,
- bus_dmamap_t *mapp)
-{
- bus_dmamap_t newmap = NULL;
- busdma_bufalloc_t ba;
- struct busdma_bufzone *bufzone;
- vm_memattr_t memattr;
- void *vaddr;
-
- int mflags;
-
- if (flags & BUS_DMA_NOWAIT)
- mflags = M_NOWAIT;
- else
- mflags = M_WAITOK;
- if (dmat->segments == NULL) {
- dmat->segments = (bus_dma_segment_t *)malloc(
- sizeof(bus_dma_segment_t) * dmat->nsegments, M_BUSDMA,
- mflags);
- if (dmat->segments == NULL) {
- CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d",
- __func__, dmat, dmat->flags, ENOMEM);
- return (ENOMEM);
- }
- }
-
- newmap = _busdma_alloc_dmamap(dmat);
- if (newmap == NULL) {
- CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d",
- __func__, dmat, dmat->flags, ENOMEM);
- return (ENOMEM);
- }
-
- /*
- * If all the memory is coherent with DMA then we don't need to
- * do anything special for a coherent mapping request.
- */
- if (dmat->flags & BUS_DMA_COHERENT)
- flags &= ~BUS_DMA_COHERENT;
-
- if (flags & BUS_DMA_COHERENT) {
- memattr = VM_MEMATTR_UNCACHEABLE;
- ba = coherent_allocator;
- newmap->flags |= DMAMAP_UNCACHEABLE;
- } else {
- memattr = VM_MEMATTR_DEFAULT;
- ba = standard_allocator;
- }
- /* All buffers we allocate are cache-aligned. */
- newmap->flags |= DMAMAP_CACHE_ALIGNED;
-
- if (flags & BUS_DMA_ZERO)
- mflags |= M_ZERO;
-
- /*
- * Try to find a bufzone in the allocator that holds a cache of buffers
- * of the right size for this request. If the buffer is too big to be
- * held in the allocator cache, this returns NULL.
- */
- bufzone = busdma_bufalloc_findzone(ba, dmat->maxsize);
-
- /*
- * Allocate the buffer from the uma(9) allocator if...
- * - It's small enough to be in the allocator (bufzone not NULL).
- * - The alignment constraint isn't larger than the allocation size
- * (the allocator aligns buffers to their size boundaries).
- * - There's no need to handle lowaddr/highaddr exclusion zones.
- * else allocate non-contiguous pages if...
- * - The page count that could get allocated doesn't exceed
- * nsegments also when the maximum segment size is less
- * than PAGE_SIZE.
- * - The alignment constraint isn't larger than a page boundary.
- * - There are no boundary-crossing constraints.
- * else allocate a block of contiguous pages because one or more of the
- * constraints is something that only the contig allocator can fulfill.
- */
- if (bufzone != NULL && dmat->alignment <= bufzone->size &&
- !_bus_dma_can_bounce(dmat->lowaddr, dmat->highaddr)) {
- vaddr = uma_zalloc(bufzone->umazone, mflags);
- } else if (dmat->nsegments >=
- howmany(dmat->maxsize, MIN(dmat->maxsegsz, PAGE_SIZE)) &&
- dmat->alignment <= PAGE_SIZE &&
- (dmat->boundary % PAGE_SIZE) == 0) {
- vaddr = (void *)kmem_alloc_attr(dmat->maxsize, mflags, 0,
- dmat->lowaddr, memattr);
- } else {
- vaddr = (void *)kmem_alloc_contig(dmat->maxsize, mflags, 0,
- dmat->lowaddr, dmat->alignment, dmat->boundary, memattr);
- }
- if (vaddr == NULL) {
- _busdma_free_dmamap(newmap);
- newmap = NULL;
- } else {
- newmap->sync_count = 0;
- }
- *vaddrp = vaddr;
- *mapp = newmap;
-
- return (vaddr == NULL ? ENOMEM : 0);
-}
-
-/*
- * Free a piece of memory and it's allocated dmamap, that was allocated
- * via bus_dmamem_alloc. Make the same choice for free/contigfree.
- */
-void
-bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
-{
- struct busdma_bufzone *bufzone;
- busdma_bufalloc_t ba;
-
- if (map->flags & DMAMAP_UNCACHEABLE)
- ba = coherent_allocator;
- else
- ba = standard_allocator;
-
- free(map->slist, M_BUSDMA);
- uma_zfree(dmamap_zone, map);
-
- bufzone = busdma_bufalloc_findzone(ba, dmat->maxsize);
-
- if (bufzone != NULL && dmat->alignment <= bufzone->size &&
- !_bus_dma_can_bounce(dmat->lowaddr, dmat->highaddr))
- uma_zfree(bufzone->umazone, vaddr);
- else
- kmem_free((vm_offset_t)vaddr, dmat->maxsize);
- CTR3(KTR_BUSDMA, "%s: tag %p flags 0x%x", __func__, dmat, dmat->flags);
-}
-
-static void
-_bus_dmamap_count_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf,
- bus_size_t buflen, int flags)
-{
- bus_addr_t curaddr;
- bus_size_t sgsize;
-
- if (map->pagesneeded == 0) {
- CTR3(KTR_BUSDMA, "lowaddr= %d, boundary= %d, alignment= %d",
- dmat->lowaddr, dmat->boundary, dmat->alignment);
- CTR2(KTR_BUSDMA, "map= %p, pagesneeded= %d",
- map, map->pagesneeded);
- /*
- * Count the number of bounce pages
- * needed in order to complete this transfer
- */
- curaddr = buf;
- while (buflen != 0) {
- sgsize = MIN(buflen, dmat->maxsegsz);
- if (run_filter(dmat, curaddr) != 0) {
- sgsize = MIN(sgsize, PAGE_SIZE);
- map->pagesneeded++;
- }
- curaddr += sgsize;
- buflen -= sgsize;
- }
- CTR1(KTR_BUSDMA, "pagesneeded= %d\n", map->pagesneeded);
- }
-}
-
-static void
-_bus_dmamap_count_pages(bus_dma_tag_t dmat, bus_dmamap_t map, pmap_t pmap,
- void *buf, bus_size_t buflen, int flags)
-{
- vm_offset_t vaddr;
- vm_offset_t vendaddr;
- bus_addr_t paddr;
-
- if (map->pagesneeded == 0) {
- CTR3(KTR_BUSDMA, "lowaddr= %d, boundary= %d, alignment= %d",
- dmat->lowaddr, dmat->boundary, dmat->alignment);
- CTR2(KTR_BUSDMA, "map= %p, pagesneeded= %d",
- map, map->pagesneeded);
- /*
- * Count the number of bounce pages
- * needed in order to complete this transfer
- */
- vaddr = (vm_offset_t)buf;
- vendaddr = (vm_offset_t)buf + buflen;
-
- while (vaddr < vendaddr) {
- bus_size_t sg_len;
-
- KASSERT(kernel_pmap == pmap, ("pmap is not kernel pmap"));
- sg_len = PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK);
- paddr = pmap_kextract(vaddr);
- if (((dmat->flags & BUS_DMA_COULD_BOUNCE) != 0) &&
- run_filter(dmat, paddr) != 0) {
- sg_len = roundup2(sg_len, dmat->alignment);
- map->pagesneeded++;
- }
- vaddr += sg_len;
- }
- CTR1(KTR_BUSDMA, "pagesneeded= %d\n", map->pagesneeded);
- }
-}
-
-static int
-_bus_dmamap_reserve_pages(bus_dma_tag_t dmat, bus_dmamap_t map,int flags)
-{
-
- /* Reserve Necessary Bounce Pages */
- mtx_lock(&bounce_lock);
- if (flags & BUS_DMA_NOWAIT) {
- if (reserve_bounce_pages(dmat, map, 0) != 0) {
- mtx_unlock(&bounce_lock);
- return (ENOMEM);
- }
- } else {
- if (reserve_bounce_pages(dmat, map, 1) != 0) {
- /* Queue us for resources */
- STAILQ_INSERT_TAIL(&bounce_map_waitinglist,
- map, links);
- mtx_unlock(&bounce_lock);
- return (EINPROGRESS);
- }
- }
- mtx_unlock(&bounce_lock);
-
- return (0);
-}
-
-/*
- * Add a single contiguous physical range to the segment list.
- */
-static int
-_bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
- bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
-{
- int seg;
-
- /*
- * Make sure we don't cross any boundaries.
- */
- if (!vm_addr_bound_ok(curaddr, sgsize, dmat->boundary))
- sgsize = roundup2(curaddr, dmat->boundary) - curaddr;
-
- /*
- * Insert chunk into a segment, coalescing with
- * the previous segment if possible.
- */
- seg = *segp;
- if (seg >= 0 &&
- curaddr == segs[seg].ds_addr + segs[seg].ds_len &&
- (segs[seg].ds_len + sgsize) <= dmat->maxsegsz &&
- vm_addr_bound_ok(segs[seg].ds_addr, segs[seg].ds_len,
- dmat->boundary))
- segs[seg].ds_len += sgsize;
- } else {
- if (++seg >= dmat->nsegments)
- return (0);
- segs[seg].ds_addr = curaddr;
- segs[seg].ds_len = sgsize;
- }
- *segp = seg;
- return (sgsize);
-}
-
-/*
- * Utility function to load a physical buffer. segp contains
- * the starting segment on entrace, and the ending segment on exit.
- */
-int
-_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map,
- vm_paddr_t buf, bus_size_t buflen, int flags, bus_dma_segment_t *segs,
- int *segp)
-{
- bus_addr_t curaddr;
- bus_size_t sgsize;
- int error;
-
- if (segs == NULL)
- segs = dmat->segments;
-
- if ((dmat->flags & BUS_DMA_COULD_BOUNCE) != 0) {
- _bus_dmamap_count_phys(dmat, map, buf, buflen, flags);
- if (map->pagesneeded != 0) {
- error = _bus_dmamap_reserve_pages(dmat, map, flags);
- if (error)
- return (error);
- }
- }
-
- while (buflen > 0) {
- curaddr = buf;
- sgsize = MIN(buflen, dmat->maxsegsz);
- if (((dmat->flags & BUS_DMA_COULD_BOUNCE) != 0) &&
- map->pagesneeded != 0 && run_filter(dmat, curaddr)) {
- sgsize = MIN(sgsize, PAGE_SIZE);
- curaddr = add_bounce_page(dmat, map, 0, curaddr,
- sgsize);
- }
- sgsize = _bus_dmamap_addseg(dmat, map, curaddr, sgsize, segs,
- segp);
- if (sgsize == 0)
- break;
- buf += sgsize;
- buflen -= sgsize;
- }
-
- /*
- * Did we fit?
- */
- if (buflen != 0) {
- bus_dmamap_unload(dmat, map);
- return (EFBIG); /* XXX better return value here? */
- }
- return (0);
-}
-
-int
-_bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map,
- struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
- bus_dma_segment_t *segs, int *segp)
-{
-
- return (bus_dmamap_load_ma_triv(dmat, map, ma, tlen, ma_offs, flags,
- segs, segp));
-}
-
-/*
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