diff --git a/sys/arm/arm/busdma_machdep-v4.c b/sys/arm/arm/busdma_machdep-v4.c deleted file mode 100644 index 68088799de70..000000000000 --- a/sys/arm/arm/busdma_machdep-v4.c +++ /dev/null @@ -1,1671 +0,0 @@ -/*- - * Copyright (c) 2012 Ian Lepore - * Copyright (c) 2004 Olivier Houchard - * Copyright (c) 2002 Peter Grehan - * 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. - * - * From i386/busdma_machdep.c,v 1.26 2002/04/19 22:58:09 alfred - */ - -#include -__FBSDID("$FreeBSD$"); - -/* - * ARM bus dma support routines. - * - * XXX Things to investigate / fix some day... - * - What is the earliest that this API can be called? Could there be any - * fallout from changing the SYSINIT() order from SI_SUB_VM to SI_SUB_KMEM? - * - The manpage mentions the BUS_DMA_NOWAIT flag only in the context of the - * bus_dmamap_load() function. This code has historically (and still does) - * honor it in bus_dmamem_alloc(). If we got rid of that we could lose some - * error checking because some resource management calls would become WAITOK - * and thus "cannot fail." - * - The decisions made by _bus_dma_can_bounce() should be made once, at tag - * creation time, and the result stored in the tag. - * - It should be possible to take some shortcuts when mapping a buffer we know - * came from the uma(9) allocators based on what we know about such buffers - * (aligned, contiguous, etc). - * - The allocation of bounce pages could probably be cleaned up, then we could - * retire arm_remap_nocache(). - */ - -#define _ARM32_BUS_DMA_PRIVATE -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#define MAX_BPAGES 64 -#define MAX_DMA_SEGMENTS 4096 -#define BUS_DMA_COULD_BOUNCE BUS_DMA_BUS3 -#define BUS_DMA_MIN_ALLOC_COMP BUS_DMA_BUS4 - -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; - struct bounce_zone *bounce_zone; - /* - * DMA range for this tag. If the page doesn't fall within - * one of these ranges, an error is returned. The caller - * may then decide what to do with the transfer. If the - * range pointer is NULL, it is ignored. - */ - struct arm32_dma_range *ranges; - int _nranges; -}; - -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 */ - vm_page_t datapage; /* physical page of client data */ - vm_offset_t dataoffs; /* page offset of client data */ - bus_size_t datacount; /* client data count */ - STAILQ_ENTRY(bounce_page) links; -}; - -struct sync_list { - vm_offset_t vaddr; /* kva of client data */ - vm_page_t pages; /* starting page of client data */ - vm_offset_t dataoffs; /* page offset of client data */ - bus_size_t datacount; /* client data count */ -}; - -int busdma_swi_pending; - -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 uint32_t tags_total; -static uint32_t maps_total; -static uint32_t maps_dmamem; -static uint32_t maps_coherent; -static counter_u64_t maploads_total; -static counter_u64_t maploads_bounced; -static counter_u64_t maploads_coherent; -static counter_u64_t maploads_dmamem; -static counter_u64_t maploads_mbuf; -static counter_u64_t maploads_physmem; - -static STAILQ_HEAD(, bounce_zone) bounce_zone_list; - -SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters"); -SYSCTL_UINT(_hw_busdma, OID_AUTO, tags_total, CTLFLAG_RD, &tags_total, 0, - "Number of active tags"); -SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_total, CTLFLAG_RD, &maps_total, 0, - "Number of active maps"); -SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_dmamem, CTLFLAG_RD, &maps_dmamem, 0, - "Number of active maps for bus_dmamem_alloc buffers"); -SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_coherent, CTLFLAG_RD, &maps_coherent, 0, - "Number of active maps with BUS_DMA_COHERENT flag set"); -SYSCTL_COUNTER_U64(_hw_busdma, OID_AUTO, maploads_total, CTLFLAG_RD, - &maploads_total, "Number of load operations performed"); -SYSCTL_COUNTER_U64(_hw_busdma, OID_AUTO, maploads_bounced, CTLFLAG_RD, - &maploads_bounced, "Number of load operations that used bounce buffers"); -SYSCTL_COUNTER_U64(_hw_busdma, OID_AUTO, maploads_coherent, CTLFLAG_RD, - &maploads_dmamem, "Number of load operations on BUS_DMA_COHERENT memory"); -SYSCTL_COUNTER_U64(_hw_busdma, OID_AUTO, maploads_dmamem, CTLFLAG_RD, - &maploads_dmamem, "Number of load operations on bus_dmamem_alloc buffers"); -SYSCTL_COUNTER_U64(_hw_busdma, OID_AUTO, maploads_mbuf, CTLFLAG_RD, - &maploads_mbuf, "Number of load operations for mbufs"); -SYSCTL_COUNTER_U64(_hw_busdma, OID_AUTO, maploads_physmem, CTLFLAG_RD, - &maploads_physmem, "Number of load operations on physical buffers"); -SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0, - "Total bounce pages"); - -struct bus_dmamap { - struct bp_list bpages; - int pagesneeded; - int pagesreserved; - bus_dma_tag_t dmat; - struct memdesc mem; - bus_dmamap_callback_t *callback; - void *callback_arg; - int flags; -#define DMAMAP_COHERENT (1 << 0) -#define DMAMAP_DMAMEM_ALLOC (1 << 1) -#define DMAMAP_MBUF (1 << 2) -#define DMAMAP_CACHE_ALIGNED (1 << 3) - STAILQ_ENTRY(bus_dmamap) links; - bus_dma_segment_t *segments; - 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); -static void bus_dmamap_sync_sl(struct sync_list *sl, bus_dmasync_op_t op, - int bufaligned); - -/* - * ---------------------------------------------------------------------------- - * Begin block of code useful to transplant to other implementations. - */ - -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"); - -static void -busdma_init(void *dummy) -{ - - maploads_total = counter_u64_alloc(M_WAITOK); - maploads_bounced = counter_u64_alloc(M_WAITOK); - maploads_coherent = counter_u64_alloc(M_WAITOK); - maploads_dmamem = counter_u64_alloc(M_WAITOK); - maploads_mbuf = counter_u64_alloc(M_WAITOK); - maploads_physmem = counter_u64_alloc(M_WAITOK); - - /* Create a cache of buffers in standard (cacheable) memory. */ - standard_allocator = busdma_bufalloc_create("buffer", - arm_dcache_align, /* 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 (and potentially BUS_DMA_NOCACHE) flag. - */ - coherent_allocator = busdma_bufalloc_create("coherent", - arm_dcache_align, /* minimum_alignment */ - busdma_bufalloc_alloc_uncacheable, - busdma_bufalloc_free_uncacheable, - 0); /* uma_zcreate_flags */ -} - -/* - * This init historically used SI_SUB_VM, but now the init code requires - * malloc(9) using M_BUSDMA memory and the pcpu zones for counter(9), which get - * set up by SI_SUB_KMEM and SI_ORDER_LAST, so we'll go right after that by - * using SI_SUB_KMEM+1. - */ -SYSINIT(busdma, SI_SUB_KMEM+1, SI_ORDER_FIRST, busdma_init, NULL); - -/* - * End block of code useful to transplant to other implementations. - * ---------------------------------------------------------------------------- - */ - -/* - * 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) - || ((paddr & (dmat->alignment - 1)) != 0)) - && (dmat->filter == NULL - || (*dmat->filter)(dmat->filterarg, paddr) != 0)) - retval = 1; - - dmat = dmat->parent; - } while (retval == 0 && dmat != NULL); - return (retval); -} - -/* - * This routine checks the exclusion zone constraints from a tag against the - * physical RAM available on the machine. If a tag specifies an exclusion zone - * but there's no RAM in that zone, then we avoid allocating resources to bounce - * a request, and we can use any memory allocator (as opposed to needing - * kmem_alloc_contig() just because it can allocate pages in an address range). - * - * Most tags have BUS_SPACE_MAXADDR or BUS_SPACE_MAXADDR_32BIT (they are the - * same value on 32-bit architectures) as their lowaddr constraint, and we can't - * possibly have RAM at an address higher than the highest address we can - * express, so we take a fast out. - */ -static __inline int -_bus_dma_can_bounce(vm_offset_t lowaddr, vm_offset_t highaddr) -{ - int i; - - if (lowaddr >= BUS_SPACE_MAXADDR) - return (0); - - 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); -} - -static __inline struct arm32_dma_range * -_bus_dma_inrange(struct arm32_dma_range *ranges, int nranges, - bus_addr_t curaddr) -{ - struct arm32_dma_range *dr; - int i; - - for (i = 0, dr = ranges; i < nranges; i++, dr++) { - if (curaddr >= dr->dr_sysbase && - round_page(curaddr) <= (dr->dr_sysbase + dr->dr_len)) - return (dr); - } - - return (NULL); -} - -/* - * Convenience function for manipulating driver locks from busdma (during - * busdma_swi, for example). Drivers that don't provide their own locks - * should specify &Giant to dmat->lockfuncarg. Drivers that use their own - * non-mutex locking scheme don't have to use this at all. - */ -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 -} - -/* - * Allocate a device specific dma_tag. - */ -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; - - 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 ? alignment : 1; - 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; - newtag->ranges = bus_dma_get_range(); - newtag->_nranges = bus_dma_get_range_nb(); - if (lockfunc != NULL) { - newtag->lockfunc = lockfunc; - newtag->lockfuncarg = lockfuncarg; - } else { - newtag->lockfunc = dflt_lock; - newtag->lockfuncarg = 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 { - atomic_add_32(&tags_total, 1); - *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_init(bus_dma_tag_template_t *t, bus_dma_tag_t parent) -{ - - if (t == NULL) - return; - - t->parent = parent; - t->alignment = 1; - t->boundary = 0; - t->lowaddr = t->highaddr = BUS_SPACE_MAXADDR; - t->maxsize = t->maxsegsize = BUS_SPACE_MAXSIZE; - t->nsegments = BUS_SPACE_UNRESTRICTED; - t->lockfunc = NULL; - t->lockfuncarg = NULL; - t->flags = 0; -} - -int -bus_dma_template_tag(bus_dma_tag_template_t *t, bus_dma_tag_t *dmat) -{ - - if (t == NULL || dmat == NULL) - return (EINVAL); - - return (bus_dma_tag_create(t->parent, t->alignment, t->boundary, - t->lowaddr, t->highaddr, NULL, NULL, t->maxsize, - t->nsegments, t->maxsegsize, t->flags, t->lockfunc, t->lockfuncarg, - dmat)); -} - -void -bus_dma_template_clone(bus_dma_tag_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) -{ - bus_dma_tag_t dmat_copy; - int error; - - error = 0; - dmat_copy = dmat; - - if (dmat != NULL) { - - if (dmat->map_count != 0) { - error = EBUSY; - goto out; - } - - while (dmat != NULL) { - bus_dma_tag_t parent; - - parent = dmat->parent; - atomic_subtract_int(&dmat->ref_count, 1); - if (dmat->ref_count == 0) { - atomic_subtract_32(&tags_total, 1); - free(dmat, M_BUSDMA); - /* - * Last reference count, so - * release our reference - * count on our parent. - */ - dmat = parent; - } else - dmat = NULL; - } - } -out: - CTR3(KTR_BUSDMA, "%s tag %p error %d", __func__, dmat_copy, error); - return (error); -} - -static int -allocate_bz_and_pages(bus_dma_tag_t dmat, bus_dmamap_t map) -{ - int error; - - /* - * 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) { - return (error); - } - } - bz = dmat->bounce_zone; - - /* Initialize the new map */ - STAILQ_INIT(&(map->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) - return (ENOMEM); - - if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) - dmat->flags |= BUS_DMA_MIN_ALLOC_COMP; - } - bz->map_count++; - } - return (0); -} - -static bus_dmamap_t -allocate_map(bus_dma_tag_t dmat, int mflags) -{ - int mapsize, segsize; - bus_dmamap_t map; - - /* - * Allocate the map. The map structure ends with an embedded - * variable-sized array of sync_list structures. Following that - * we allocate enough extra space to hold the array of bus_dma_segments. - */ - KASSERT(dmat->nsegments <= MAX_DMA_SEGMENTS, - ("cannot allocate %u dma segments (max is %u)", - dmat->nsegments, MAX_DMA_SEGMENTS)); - segsize = sizeof(struct bus_dma_segment) * dmat->nsegments; - mapsize = sizeof(*map) + sizeof(struct sync_list) * dmat->nsegments; - map = malloc(mapsize + segsize, M_BUSDMA, mflags | M_ZERO); - if (map == NULL) { - CTR3(KTR_BUSDMA, "%s: tag %p error %d", __func__, dmat, ENOMEM); - return (NULL); - } - map->segments = (bus_dma_segment_t *)((uintptr_t)map + mapsize); - STAILQ_INIT(&map->bpages); - return (map); -} - -/* - * 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 map; - int error = 0; - - *mapp = map = allocate_map(dmat, M_NOWAIT); - if (map == NULL) { - CTR3(KTR_BUSDMA, "%s: tag %p error %d", __func__, dmat, ENOMEM); - return (ENOMEM); - } - - /* - * Bouncing might be required if the driver asks for an exclusion - * region, a data alignment that is stricter than 1, or DMA that begins - * or ends with a partial cacheline. Whether bouncing will actually - * happen can't be known until mapping time, but we need to pre-allocate - * resources now because we might not be allowed to at mapping time. - */ - error = allocate_bz_and_pages(dmat, map); - if (error != 0) { - free(map, M_BUSDMA); - *mapp = NULL; - return (error); - } - if (map->flags & DMAMAP_COHERENT) - atomic_add_32(&maps_coherent, 1); - atomic_add_32(&maps_total, 1); - dmat->map_count++; - - 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--; - if (map->flags & DMAMAP_COHERENT) - atomic_subtract_32(&maps_coherent, 1); - atomic_subtract_32(&maps_total, 1); - free(map, M_BUSDMA); - dmat->map_count--; - 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 listed in the dma tag. Returns a pointer to - * the allocated memory, and a pointer to an associated bus_dmamap. - */ -int -bus_dmamem_alloc(bus_dma_tag_t dmat, void **vaddr, int flags, - bus_dmamap_t *mapp) -{ - busdma_bufalloc_t ba; - struct busdma_bufzone *bufzone; - bus_dmamap_t map; - vm_memattr_t memattr; - int mflags; - - if (flags & BUS_DMA_NOWAIT) - mflags = M_NOWAIT; - else - mflags = M_WAITOK; - if (flags & BUS_DMA_ZERO) - mflags |= M_ZERO; - - *mapp = map = allocate_map(dmat, mflags); - if (map == NULL) { - CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", - __func__, dmat, dmat->flags, ENOMEM); - return (ENOMEM); - } - map->flags = DMAMAP_DMAMEM_ALLOC; - - /* Choose a busdma buffer allocator based on memory type flags. */ - if (flags & BUS_DMA_COHERENT) { - memattr = VM_MEMATTR_UNCACHEABLE; - ba = coherent_allocator; - map->flags |= DMAMAP_COHERENT; - } else { - memattr = VM_MEMATTR_DEFAULT; - ba = standard_allocator; - } - - /* - * 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. - * - 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) { - CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", - __func__, dmat, dmat->flags, ENOMEM); - free(map, M_BUSDMA); - *mapp = NULL; - return (ENOMEM); - } - if (map->flags & DMAMAP_COHERENT) - atomic_add_32(&maps_coherent, 1); - atomic_add_32(&maps_dmamem, 1); - atomic_add_32(&maps_total, 1); - dmat->map_count++; - - CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", - __func__, dmat, dmat->flags, 0); - return (0); -} - -/* - * Free a piece of memory that was allocated via bus_dmamem_alloc, along with - * its associated map. - */ -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_COHERENT) - ba = coherent_allocator; - else - ba = standard_allocator; - - 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); - - dmat->map_count--; - if (map->flags & DMAMAP_COHERENT) - atomic_subtract_32(&maps_coherent, 1); - atomic_subtract_32(&maps_total, 1); - atomic_subtract_32(&maps_dmamem, 1); - free(map, M_BUSDMA); - 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 - (curaddr & PAGE_MASK)); - 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 = trunc_page((vm_offset_t)buf); - vendaddr = (vm_offset_t)buf + buflen; - - while (vaddr < vendaddr) { - if (__predict_true(pmap == kernel_pmap)) - paddr = pmap_kextract(vaddr); - else - paddr = pmap_extract(pmap, vaddr); - if (run_filter(dmat, paddr) != 0) - map->pagesneeded++; - vaddr += PAGE_SIZE; - } - 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) -{ - bus_addr_t baddr, bmask; - int seg; - - /* - * Make sure we don't cross any boundaries. - */ - bmask = ~(dmat->boundary - 1); - if (dmat->boundary > 0) { - baddr = (curaddr + dmat->boundary) & bmask; - if (sgsize > (baddr - curaddr)) - sgsize = (baddr - curaddr); - } - if (dmat->ranges) { - struct arm32_dma_range *dr; - - dr = _bus_dma_inrange(dmat->ranges, dmat->_nranges, - curaddr); - if (dr == NULL) - return (0); - /* - * In a valid DMA range. Translate the physical - * memory address to an address in the DMA window. - */ - curaddr = (curaddr - dr->dr_sysbase) + dr->dr_busbase; - - } - - seg = *segp; - /* - * Insert chunk into a segment, coalescing with - * the previous segment if possible. - */ - if (seg >= 0 && - curaddr == segs[seg].ds_addr + segs[seg].ds_len && - (segs[seg].ds_len + sgsize) <= dmat->maxsegsz && - (dmat->boundary == 0 || - (segs[seg].ds_addr & bmask) == (curaddr & bmask))) { - 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_addr_t sl_end = 0; - bus_size_t sgsize; - struct sync_list *sl; - int error; - - if (segs == NULL) - segs = map->segments; - - counter_u64_add(maploads_total, 1); - counter_u64_add(maploads_physmem, 1); - - if ((dmat->flags & BUS_DMA_COULD_BOUNCE) != 0) { - _bus_dmamap_count_phys(dmat, map, buf, buflen, flags); - if (map->pagesneeded != 0) { - counter_u64_add(maploads_bounced, 1); - error = _bus_dmamap_reserve_pages(dmat, map, flags); - if (error) - return (error); - } - } - - sl = map->slist + map->sync_count - 1; - - 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 & PAGE_MASK)); - curaddr = add_bounce_page(dmat, map, 0, curaddr, - sgsize); - } else { - if (map->sync_count > 0) - sl_end = VM_PAGE_TO_PHYS(sl->pages) + - sl->dataoffs + sl->datacount; - - if (map->sync_count == 0 || curaddr != sl_end) { - if (++map->sync_count > dmat->nsegments) - break; - sl++; - sl->vaddr = 0; - sl->datacount = sgsize; - sl->pages = PHYS_TO_VM_PAGE(curaddr); - sl->dataoffs = curaddr & PAGE_MASK; - } else - sl->datacount += 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)); -} - -/* - * Utility function to load a linear buffer. segp contains - * the starting segment on entrance, and the ending segment on exit. - */ -int -_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, - bus_size_t buflen, struct pmap *pmap, int flags, bus_dma_segment_t *segs, - int *segp) -{ - bus_size_t sgsize; - bus_addr_t curaddr; - bus_addr_t sl_pend = 0; - struct sync_list *sl; - vm_offset_t kvaddr; - vm_offset_t vaddr = (vm_offset_t)buf; - vm_offset_t sl_vend = 0; - int error = 0; - - counter_u64_add(maploads_total, 1); - if (map->flags & DMAMAP_COHERENT) - counter_u64_add(maploads_coherent, 1); - if (map->flags & DMAMAP_DMAMEM_ALLOC) - counter_u64_add(maploads_dmamem, 1); - - if (segs == NULL) - segs = map->segments; - if (flags & BUS_DMA_LOAD_MBUF) { - counter_u64_add(maploads_mbuf, 1); - map->flags |= DMAMAP_CACHE_ALIGNED; - } - - if ((dmat->flags & BUS_DMA_COULD_BOUNCE) != 0) { - _bus_dmamap_count_pages(dmat, map, pmap, buf, buflen, flags); - if (map->pagesneeded != 0) { - counter_u64_add(maploads_bounced, 1); - error = _bus_dmamap_reserve_pages(dmat, map, flags); - if (error) - return (error); - } - } - CTR3(KTR_BUSDMA, "lowaddr= %d boundary= %d, " - "alignment= %d", dmat->lowaddr, dmat->boundary, dmat->alignment); - - sl = map->slist + map->sync_count - 1; - - while (buflen > 0) { - /* - * Get the physical address for this segment. - */ - if (__predict_true(pmap == kernel_pmap)) { - curaddr = pmap_kextract(vaddr); - kvaddr = vaddr; - } else { - curaddr = pmap_extract(pmap, vaddr); - map->flags &= ~DMAMAP_COHERENT; - kvaddr = 0; - } - - /* - * Compute the segment size, and adjust counts. - */ - sgsize = PAGE_SIZE - (curaddr & PAGE_MASK); - if (sgsize > dmat->maxsegsz) - sgsize = dmat->maxsegsz; - if (buflen < sgsize) - sgsize = buflen; - - if (((dmat->flags & BUS_DMA_COULD_BOUNCE) != 0) && - map->pagesneeded != 0 && run_filter(dmat, curaddr)) { - curaddr = add_bounce_page(dmat, map, kvaddr, curaddr, - sgsize); - } else { - if (map->sync_count > 0) { - sl_pend = VM_PAGE_TO_PHYS(sl->pages) + - sl->dataoffs + sl->datacount; - sl_vend = sl->vaddr + sl->datacount; - } - - if (map->sync_count == 0 || - (kvaddr != 0 && kvaddr != sl_vend) || - (kvaddr == 0 && curaddr != sl_pend)) { - - if (++map->sync_count > dmat->nsegments) - goto cleanup; - sl++; - sl->vaddr = kvaddr; - sl->datacount = sgsize; - sl->pages = PHYS_TO_VM_PAGE(curaddr); - sl->dataoffs = curaddr & PAGE_MASK; - } else - sl->datacount += sgsize; - } - sgsize = _bus_dmamap_addseg(dmat, map, curaddr, sgsize, segs, - segp); - if (sgsize == 0) - break; - vaddr += sgsize; - buflen -= sgsize; - } - -cleanup: - /* - * Did we fit? - */ - if (buflen != 0) { - bus_dmamap_unload(dmat, map); - return (EFBIG); /* XXX better return value here? */ - } - return (0); -} - -void -_bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map, struct memdesc *mem, - bus_dmamap_callback_t *callback, void *callback_arg) -{ - - KASSERT(dmat != NULL, ("dmatag is NULL")); - KASSERT(map != NULL, ("dmamap is NULL")); - map->mem = *mem; - map->callback = callback; - map->callback_arg = callback_arg; -} - -bus_dma_segment_t * -_bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map, - bus_dma_segment_t *segs, int nsegs, int error) -{ - - if (segs == NULL) - segs = map->segments; - return (segs); -} - -/* - * Release the mapping held by map. - */ -void -bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map) -{ - struct bounce_page *bpage; - struct bounce_zone *bz; - - if ((bz = dmat->bounce_zone) != NULL) { - while ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) { - STAILQ_REMOVE_HEAD(&map->bpages, links); - free_bounce_page(dmat, bpage); - } - - bz = dmat->bounce_zone; - bz->free_bpages += map->pagesreserved; - bz->reserved_bpages -= map->pagesreserved; - map->pagesreserved = 0; - map->pagesneeded = 0; - } - map->sync_count = 0; - map->flags &= ~DMAMAP_MBUF; -} - -static void -bus_dmamap_sync_buf(vm_offset_t buf, int len, bus_dmasync_op_t op, - int bufaligned) -{ - char _tmp_cl[arm_dcache_align], _tmp_clend[arm_dcache_align]; - register_t s; - int partial; - - if ((op & BUS_DMASYNC_PREWRITE) && !(op & BUS_DMASYNC_PREREAD)) { - cpu_dcache_wb_range(buf, len); - cpu_l2cache_wb_range(buf, len); - } - - /* - * If the caller promises the buffer is properly aligned to a cache line - * (even if the call parms make it look like it isn't) we can avoid - * attempting to preserve the non-DMA part of the cache line in the - * POSTREAD case, but we MUST still do a writeback in the PREREAD case. - * - * This covers the case of mbufs, where we know how they're aligned and - * know the CPU doesn't touch the header in front of the DMA data area - * during the IO, but it may have touched it right before invoking the - * sync, so a PREREAD writeback is required. - * - * It also handles buffers we created in bus_dmamem_alloc(), which are - * always aligned and padded to cache line size even if the IO length - * isn't a multiple of cache line size. In this case the PREREAD - * writeback probably isn't required, but it's harmless. - */ - partial = (((vm_offset_t)buf) | len) & arm_dcache_align_mask; - - if (op & BUS_DMASYNC_PREREAD) { - if (!(op & BUS_DMASYNC_PREWRITE) && !partial) { - cpu_dcache_inv_range(buf, len); - cpu_l2cache_inv_range(buf, len); - } else { - cpu_dcache_wbinv_range(buf, len); - cpu_l2cache_wbinv_range(buf, len); - } - } - if (op & BUS_DMASYNC_POSTREAD) { - if (partial && !bufaligned) { - s = intr_disable(); - if (buf & arm_dcache_align_mask) - memcpy(_tmp_cl, (void *)(buf & - ~arm_dcache_align_mask), - buf & arm_dcache_align_mask); - if ((buf + len) & arm_dcache_align_mask) - memcpy(_tmp_clend, - (void *)(buf + len), - arm_dcache_align - - ((buf + len) & arm_dcache_align_mask)); - } - cpu_dcache_inv_range(buf, len); - cpu_l2cache_inv_range(buf, len); - if (partial && !bufaligned) { - if (buf & arm_dcache_align_mask) - memcpy((void *)(buf & - ~arm_dcache_align_mask), _tmp_cl, - buf & arm_dcache_align_mask); - if ((buf + len) & arm_dcache_align_mask) - memcpy((void *)(buf + len), - _tmp_clend, arm_dcache_align - - ((buf + len) & arm_dcache_align_mask)); - intr_restore(s); - } - } -} - -static void -bus_dmamap_sync_sl(struct sync_list *sl, bus_dmasync_op_t op, - int bufaligned) -{ - vm_offset_t tempvaddr; - vm_page_t curpage; - size_t npages; - - if (sl->vaddr != 0) { - bus_dmamap_sync_buf(sl->vaddr, sl->datacount, op, bufaligned); - return; - } - - tempvaddr = 0; - npages = atop(round_page(sl->dataoffs + sl->datacount)); - - for (curpage = sl->pages; curpage != sl->pages + npages; ++curpage) { - /* - * If the page is mapped to some other VA that hasn't - * been supplied to busdma, then pmap_quick_enter_page() - * will find all duplicate mappings and mark them - * uncacheable. - * That will also do any necessary wb/inv. Otherwise, - * if the page is truly unmapped, then we don't actually - * need to do cache maintenance. - * XXX: May overwrite DMA'ed data in the POSTREAD - * case where the CPU has written to a cacheline not - * completely covered by the DMA region. - */ - KASSERT(VM_PAGE_TO_PHYS(curpage) == VM_PAGE_TO_PHYS(sl->pages) + - ptoa(curpage - sl->pages), - ("unexpected vm_page_t phys: 0x%08x != 0x%08x", - VM_PAGE_TO_PHYS(curpage), VM_PAGE_TO_PHYS(sl->pages) + - ptoa(curpage - sl->pages))); - tempvaddr = pmap_quick_enter_page(curpage); - pmap_quick_remove_page(tempvaddr); - } -} - -static void -_bus_dmamap_sync_bp(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op) -{ - struct bounce_page *bpage; - vm_offset_t datavaddr, tempvaddr; - - if ((op & (BUS_DMASYNC_PREWRITE | BUS_DMASYNC_POSTREAD)) == 0) - return; - - STAILQ_FOREACH(bpage, &map->bpages, links) { - tempvaddr = 0; - datavaddr = bpage->datavaddr; - if (op & BUS_DMASYNC_PREWRITE) { - if (datavaddr == 0) { - tempvaddr = - pmap_quick_enter_page(bpage->datapage); - datavaddr = tempvaddr | bpage->dataoffs; - } - bcopy((void *)datavaddr, - (void *)bpage->vaddr, bpage->datacount); - if (tempvaddr != 0) - pmap_quick_remove_page(tempvaddr); - cpu_dcache_wb_range(bpage->vaddr, bpage->datacount); - cpu_l2cache_wb_range(bpage->vaddr, bpage->datacount); - dmat->bounce_zone->total_bounced++; - } - if (op & BUS_DMASYNC_POSTREAD) { - cpu_dcache_inv_range(bpage->vaddr, bpage->datacount); - cpu_l2cache_inv_range(bpage->vaddr, bpage->datacount); - if (datavaddr == 0) { - tempvaddr = - pmap_quick_enter_page(bpage->datapage); - datavaddr = tempvaddr | bpage->dataoffs; - } - bcopy((void *)bpage->vaddr, - (void *)datavaddr, bpage->datacount); - if (tempvaddr != 0) - pmap_quick_remove_page(tempvaddr); - dmat->bounce_zone->total_bounced++; - } - } -} - -void -bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op) -{ - struct sync_list *sl, *end; - int bufaligned; - - if (op == BUS_DMASYNC_POSTWRITE) - return; - if (map->flags & DMAMAP_COHERENT) - goto drain; - if (STAILQ_FIRST(&map->bpages)) - _bus_dmamap_sync_bp(dmat, map, op); - CTR3(KTR_BUSDMA, "%s: op %x flags %x", __func__, op, map->flags); - bufaligned = (map->flags & DMAMAP_CACHE_ALIGNED); - if (map->sync_count) { - end = &map->slist[map->sync_count]; - for (sl = &map->slist[0]; sl != end; sl++) - bus_dmamap_sync_sl(sl, op, bufaligned); - } - -drain: - - cpu_drain_writebuf(); -} - -static void -init_bounce_pages(void *dummy __unused) -{ - - total_bpages = 0; - STAILQ_INIT(&bounce_zone_list); - STAILQ_INIT(&bounce_map_waitinglist); - STAILQ_INIT(&bounce_map_callbacklist); - mtx_init(&bounce_lock, "bounce pages lock", NULL, MTX_DEF); -} -SYSINIT(bpages, SI_SUB_LOCK, SI_ORDER_ANY, init_bounce_pages, NULL); - -static struct sysctl_ctx_list * -busdma_sysctl_tree(struct bounce_zone *bz) -{ - - return (&bz->sysctl_tree); -} - -static struct sysctl_oid * -busdma_sysctl_tree_top(struct bounce_zone *bz) -{ - - return (bz->sysctl_tree_top); -} - -static int -alloc_bounce_zone(bus_dma_tag_t dmat) -{ - struct bounce_zone *bz; - - /* Check to see if we already have a suitable zone */ - STAILQ_FOREACH(bz, &bounce_zone_list, links) { - if ((dmat->alignment <= bz->alignment) && - (dmat->lowaddr >= bz->lowaddr)) { - dmat->bounce_zone = bz; - return (0); - } - } - - if ((bz = (struct bounce_zone *)malloc(sizeof(*bz), M_BUSDMA, - M_NOWAIT | M_ZERO)) == NULL) - return (ENOMEM); - - STAILQ_INIT(&bz->bounce_page_list); - bz->free_bpages = 0; - bz->reserved_bpages = 0; - bz->active_bpages = 0; - bz->lowaddr = dmat->lowaddr; - bz->alignment = MAX(dmat->alignment, PAGE_SIZE); - bz->map_count = 0; - snprintf(bz->zoneid, 8, "zone%d", busdma_zonecount); - busdma_zonecount++; - snprintf(bz->lowaddrid, 18, "%#jx", (uintmax_t)bz->lowaddr); - STAILQ_INSERT_TAIL(&bounce_zone_list, bz, links); - dmat->bounce_zone = bz; - - sysctl_ctx_init(&bz->sysctl_tree); - bz->sysctl_tree_top = SYSCTL_ADD_NODE(&bz->sysctl_tree, - SYSCTL_STATIC_CHILDREN(_hw_busdma), OID_AUTO, bz->zoneid, - CTLFLAG_RD, 0, ""); - if (bz->sysctl_tree_top == NULL) { - sysctl_ctx_free(&bz->sysctl_tree); - return (0); /* XXX error code? */ - } - - SYSCTL_ADD_INT(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "total_bpages", CTLFLAG_RD, &bz->total_bpages, 0, - "Total bounce pages"); - SYSCTL_ADD_INT(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "free_bpages", CTLFLAG_RD, &bz->free_bpages, 0, - "Free bounce pages"); - SYSCTL_ADD_INT(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "reserved_bpages", CTLFLAG_RD, &bz->reserved_bpages, 0, - "Reserved bounce pages"); - SYSCTL_ADD_INT(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "active_bpages", CTLFLAG_RD, &bz->active_bpages, 0, - "Active bounce pages"); - SYSCTL_ADD_INT(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "total_bounced", CTLFLAG_RD, &bz->total_bounced, 0, - "Total bounce requests (pages bounced)"); - SYSCTL_ADD_INT(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "total_deferred", CTLFLAG_RD, &bz->total_deferred, 0, - "Total bounce requests that were deferred"); - SYSCTL_ADD_STRING(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "lowaddr", CTLFLAG_RD, bz->lowaddrid, 0, ""); - SYSCTL_ADD_ULONG(busdma_sysctl_tree(bz), - SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, - "alignment", CTLFLAG_RD, &bz->alignment, ""); - - return (0); -} - -static int -alloc_bounce_pages(bus_dma_tag_t dmat, u_int numpages) -{ - struct bounce_zone *bz; - int count; - - bz = dmat->bounce_zone; - count = 0; - while (numpages > 0) { - struct bounce_page *bpage; - - bpage = (struct bounce_page *)malloc(sizeof(*bpage), M_BUSDMA, - M_NOWAIT | M_ZERO); - - if (bpage == NULL) - break; - bpage->vaddr = (vm_offset_t)contigmalloc(PAGE_SIZE, M_BOUNCE, - M_NOWAIT, 0ul, bz->lowaddr, PAGE_SIZE, 0); - if (bpage->vaddr == 0) { - free(bpage, M_BUSDMA); - break; - } - bpage->busaddr = pmap_kextract(bpage->vaddr); - mtx_lock(&bounce_lock); - STAILQ_INSERT_TAIL(&bz->bounce_page_list, bpage, links); - total_bpages++; - bz->total_bpages++; - bz->free_bpages++; - mtx_unlock(&bounce_lock); - count++; - numpages--; - } - return (count); -} - -static int -reserve_bounce_pages(bus_dma_tag_t dmat, bus_dmamap_t map, int commit) -{ - struct bounce_zone *bz; - int pages; - - mtx_assert(&bounce_lock, MA_OWNED); - bz = dmat->bounce_zone; - pages = MIN(bz->free_bpages, map->pagesneeded - map->pagesreserved); - if (commit == 0 && map->pagesneeded > (map->pagesreserved + pages)) - return (map->pagesneeded - (map->pagesreserved + pages)); - bz->free_bpages -= pages; - bz->reserved_bpages += pages; - map->pagesreserved += pages; - pages = map->pagesneeded - map->pagesreserved; - - return (pages); -} - -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) -{ - struct bounce_zone *bz; - struct bounce_page *bpage; - - KASSERT(dmat->bounce_zone != NULL, ("no bounce zone in dma tag")); - KASSERT(map != NULL, ("add_bounce_page: bad map %p", map)); - - bz = dmat->bounce_zone; - 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--; - - mtx_lock(&bounce_lock); - bpage = STAILQ_FIRST(&bz->bounce_page_list); - if (bpage == NULL) - panic("add_bounce_page: free page list is empty"); - - STAILQ_REMOVE_HEAD(&bz->bounce_page_list, links); - bz->reserved_bpages--; - bz->active_bpages++; - mtx_unlock(&bounce_lock); - - if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) { - /* Page offset needs to be preserved. */ - bpage->vaddr |= addr & PAGE_MASK; - bpage->busaddr |= addr & PAGE_MASK; - } - bpage->datavaddr = vaddr; - bpage->datapage = PHYS_TO_VM_PAGE(addr); - bpage->dataoffs = addr & PAGE_MASK; - 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) -{ - struct bus_dmamap *map; - struct bounce_zone *bz; - - bz = dmat->bounce_zone; - bpage->datavaddr = 0; - bpage->datacount = 0; - if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) { - /* - * Reset the bounce page to start at offset 0. Other uses - * of this bounce page may need to store a full page of - * data and/or assume it starts on a page boundary. - */ - bpage->vaddr &= ~PAGE_MASK; - bpage->busaddr &= ~PAGE_MASK; - } - - mtx_lock(&bounce_lock); - STAILQ_INSERT_HEAD(&bz->bounce_page_list, bpage, links); - bz->free_bpages++; - bz->active_bpages--; - if ((map = STAILQ_FIRST(&bounce_map_waitinglist)) != NULL) { - if (reserve_bounce_pages(map->dmat, map, 1) == 0) { - STAILQ_REMOVE_HEAD(&bounce_map_waitinglist, links); - STAILQ_INSERT_TAIL(&bounce_map_callbacklist, - map, links); - busdma_swi_pending = 1; - bz->total_deferred++; - swi_sched(vm_ih, 0); - } - } - mtx_unlock(&bounce_lock); -} - -void -busdma_swi(void) -{ - bus_dma_tag_t dmat; - struct bus_dmamap *map; - - mtx_lock(&bounce_lock); - while ((map = STAILQ_FIRST(&bounce_map_callbacklist)) != NULL) { - STAILQ_REMOVE_HEAD(&bounce_map_callbacklist, links); - mtx_unlock(&bounce_lock); - dmat = map->dmat; - dmat->lockfunc(dmat->lockfuncarg, BUS_DMA_LOCK); - bus_dmamap_load_mem(map->dmat, map, &map->mem, map->callback, - map->callback_arg, BUS_DMA_WAITOK); - dmat->lockfunc(dmat->lockfuncarg, BUS_DMA_UNLOCK); - mtx_lock(&bounce_lock); - } - mtx_unlock(&bounce_lock); -} diff --git a/sys/arm/arm/busdma_machdep-v6.c b/sys/arm/arm/busdma_machdep.c similarity index 100% rename from sys/arm/arm/busdma_machdep-v6.c rename to sys/arm/arm/busdma_machdep.c diff --git a/sys/conf/files.arm b/sys/conf/files.arm index 5495e4771296..a81e69c31a50 100644 --- a/sys/conf/files.arm +++ b/sys/conf/files.arm @@ -9,8 +9,7 @@ arm/arm/blockio.S standard arm/arm/bus_space_asm_generic.S standard arm/arm/bus_space_base.c optional fdt arm/arm/bus_space_generic.c standard -arm/arm/busdma_machdep-v4.c optional !armv7 !armv6 !ARM_USE_V6_BUSDMA -arm/arm/busdma_machdep-v6.c optional armv7 | armv6 | ARM_USE_V6_BUSDMA +arm/arm/busdma_machdep.c standard arm/arm/copystr.S standard arm/arm/cpufunc.c standard arm/arm/cpufunc_asm.S standard diff --git a/sys/conf/options.arm b/sys/conf/options.arm index 34229044fbfe..0bf0a61ac435 100644 --- a/sys/conf/options.arm +++ b/sys/conf/options.arm @@ -5,7 +5,6 @@ ARM_CACHE_LOCK_ENABLE opt_global.h ARM_KERN_DIRECTMAP opt_vm.h ARM_L2_PIPT opt_global.h ARM_MANY_BOARD opt_global.h -ARM_USE_V6_BUSDMA opt_global.h ARM_WANT_TP_ADDRESS opt_global.h COUNTS_PER_SEC opt_timer.h CPSW_ETHERSWITCH opt_cpsw.h