diff options
| -rw-r--r-- | sys/arm64/arm64/busdma_bounce.c | 1080 | ||||
| -rw-r--r-- | sys/arm64/arm64/busdma_machdep.c | 305 | ||||
| -rw-r--r-- | sys/arm64/include/bus_dma_impl.h | 96 | ||||
| -rw-r--r-- | sys/conf/files.arm64 | 1 |
4 files changed, 1473 insertions, 9 deletions
diff --git a/sys/arm64/arm64/busdma_bounce.c b/sys/arm64/arm64/busdma_bounce.c new file mode 100644 index 0000000..477c819 --- /dev/null +++ b/sys/arm64/arm64/busdma_bounce.c @@ -0,0 +1,1080 @@ +/*- + * Copyright (c) 1997, 1998 Justin T. Gibbs. + * Copyright (c) 2015 The FreeBSD Foundation + * All rights reserved. + * + * Portions of this software were developed by Semihalf + * under sponsorship of the FreeBSD Foundation. + * + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/bus.h> +#include <sys/interrupt.h> +#include <sys/kernel.h> +#include <sys/ktr.h> +#include <sys/lock.h> +#include <sys/proc.h> +#include <sys/memdesc.h> +#include <sys/mutex.h> +#include <sys/sysctl.h> +#include <sys/uio.h> + +#include <vm/vm.h> +#include <vm/vm_extern.h> +#include <vm/vm_kern.h> +#include <vm/vm_page.h> +#include <vm/vm_map.h> + +#include <machine/atomic.h> +#include <machine/bus.h> +#include <machine/md_var.h> +#include <arm64/include/bus_dma_impl.h> + +#define MAX_BPAGES 4096 + +enum { + BUS_DMA_COULD_BOUNCE = 0x01, + BUS_DMA_MIN_ALLOC_COMP = 0x02, + BUS_DMA_KMEM_ALLOC = 0x04, +}; + +struct bounce_zone; + +struct bus_dma_tag { + struct bus_dma_tag_common common; + int map_count; + int bounce_flags; + bus_dma_segment_t *segments; + struct bounce_zone *bounce_zone; +}; + +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_addr_t dataaddr; /* client physical address */ + bus_size_t datacount; /* client data count */ + STAILQ_ENTRY(bounce_page) links; +}; + +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 STAILQ_HEAD(, bounce_zone) bounce_zone_list; + +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"); + +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; + 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 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); +int run_filter(bus_dma_tag_t dmat, bus_addr_t paddr); +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); +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); +static int _bus_dmamap_reserve_pages(bus_dma_tag_t dmat, bus_dmamap_t map, + int flags); + +/* + * Allocate a device specific dma_tag. + */ +static int +bounce_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; + + *dmat = NULL; + error = common_bus_dma_tag_create(parent != NULL ? &parent->common : + NULL, alignment, boundary, lowaddr, highaddr, filter, filterarg, + maxsize, nsegments, maxsegsz, flags, lockfunc, lockfuncarg, + sizeof (struct bus_dma_tag), (void **)&newtag); + if (error != 0) + return (error); + + newtag->common.impl = &bus_dma_bounce_impl; + newtag->map_count = 0; + newtag->segments = NULL; + + if (parent != NULL && ((newtag->common.filter != NULL) || + ((parent->bounce_flags & BUS_DMA_COULD_BOUNCE) != 0))) + newtag->bounce_flags |= BUS_DMA_COULD_BOUNCE; + + if (newtag->common.lowaddr < ptoa((vm_paddr_t)Maxmem) || + newtag->common.alignment > 1) + newtag->bounce_flags |= BUS_DMA_COULD_BOUNCE; + + if (((newtag->bounce_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_DEVBUF); + 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->bounce_flags |= BUS_DMA_MIN_ALLOC_COMP; + } else + error = 0; + + if (error != 0) + free(newtag, M_DEVBUF); + else + *dmat = newtag; + CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d", + __func__, newtag, (newtag != NULL ? newtag->common.flags : 0), + error); + return (error); +} + +static int +bounce_bus_dma_tag_destroy(bus_dma_tag_t dmat) +{ + bus_dma_tag_t dmat_copy, parent; + int error; + + error = 0; + dmat_copy = dmat; + + if (dmat != NULL) { + if (dmat->map_count != 0) { + error = EBUSY; + goto out; + } + while (dmat != NULL) { + parent = (bus_dma_tag_t)dmat->common.parent; + atomic_subtract_int(&dmat->common.ref_count, 1); + if (dmat->common.ref_count == 0) { + if (dmat->segments != NULL) + free(dmat->segments, M_DEVBUF); + free(dmat, M_DEVBUF); + /* + * 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); +} + +/* + * Allocate a handle for mapping from kva/uva/physical + * address space into bus device space. + */ +static int +bounce_bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp) +{ + struct bounce_zone *bz; + int error, maxpages, pages; + + error = 0; + + if (dmat->segments == NULL) { + dmat->segments = (bus_dma_segment_t *)malloc( + sizeof(bus_dma_segment_t) * dmat->common.nsegments, + M_DEVBUF, M_NOWAIT); + if (dmat->segments == NULL) { + CTR3(KTR_BUSDMA, "%s: tag %p error %d", + __func__, dmat, ENOMEM); + return (ENOMEM); + } + } + + /* + * 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->bounce_flags & BUS_DMA_COULD_BOUNCE) { + /* Must bounce */ + if (dmat->bounce_zone == NULL) { + if ((error = alloc_bounce_zone(dmat)) != 0) + return (error); + } + bz = dmat->bounce_zone; + + *mapp = (bus_dmamap_t)malloc(sizeof(**mapp), M_DEVBUF, + M_NOWAIT | M_ZERO); + if (*mapp == NULL) { + CTR3(KTR_BUSDMA, "%s: tag %p error %d", + __func__, dmat, ENOMEM); + return (ENOMEM); + } + + /* 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. + */ + if (dmat->common.alignment > 1) + maxpages = MAX_BPAGES; + else + maxpages = MIN(MAX_BPAGES, Maxmem - + atop(dmat->common.lowaddr)); + if ((dmat->bounce_flags & BUS_DMA_MIN_ALLOC_COMP) == 0 || + (bz->map_count > 0 && bz->total_bpages < maxpages)) { + pages = MAX(atop(dmat->common.maxsize), 1); + pages = MIN(maxpages - bz->total_bpages, pages); + pages = MAX(pages, 1); + if (alloc_bounce_pages(dmat, pages) < pages) + error = ENOMEM; + if ((dmat->bounce_flags & BUS_DMA_MIN_ALLOC_COMP) + == 0) { + if (error == 0) { + dmat->bounce_flags |= + BUS_DMA_MIN_ALLOC_COMP; + } + } else + error = 0; + } + bz->map_count++; + } else { + *mapp = NULL; + } + if (error == 0) + dmat->map_count++; + CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", + __func__, dmat, dmat->common.flags, error); + return (error); +} + +/* + * Destroy a handle for mapping from kva/uva/physical + * address space into bus device space. + */ +static int +bounce_bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map) +{ + + if (map != NULL && map != &nobounce_dmamap) { + if (STAILQ_FIRST(&map->bpages) != NULL) { + CTR3(KTR_BUSDMA, "%s: tag %p error %d", + __func__, dmat, EBUSY); + return (EBUSY); + } + if (dmat->bounce_zone) + dmat->bounce_zone->map_count--; + free(map, M_DEVBUF); + } + 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 lited in the dma tag. + * A dmamap to for use with dmamap_load is also allocated. + */ +static int +bounce_bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, + bus_dmamap_t *mapp) +{ + /* + * XXX ARM64TODO: + * This bus_dma implementation requires IO-Coherent architecutre. + * If IO-Coherency is not guaranteed, the BUS_DMA_COHERENT flag has + * to be implented using non-cacheable memory. + */ + + vm_memattr_t attr; + int mflags; + + if (flags & BUS_DMA_NOWAIT) + mflags = M_NOWAIT; + else + mflags = M_WAITOK; + + /* If we succeed, no mapping/bouncing will be required */ + *mapp = NULL; + + if (dmat->segments == NULL) { + dmat->segments = (bus_dma_segment_t *)malloc( + sizeof(bus_dma_segment_t) * dmat->common.nsegments, + M_DEVBUF, mflags); + if (dmat->segments == NULL) { + CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", + __func__, dmat, dmat->common.flags, ENOMEM); + return (ENOMEM); + } + } + if (flags & BUS_DMA_ZERO) + mflags |= M_ZERO; + if (flags & BUS_DMA_NOCACHE) + attr = VM_MEMATTR_UNCACHEABLE; + else + attr = VM_MEMATTR_DEFAULT; + + /* + * XXX: + * (dmat->alignment < dmat->maxsize) is just a quick hack; the exact + * alignment guarantees of malloc need to be nailed down, and the + * code below should be rewritten to take that into account. + * + * In the meantime, we'll warn the user if malloc gets it wrong. + */ + if ((dmat->common.maxsize <= PAGE_SIZE) && + (dmat->common.alignment < dmat->common.maxsize) && + dmat->common.lowaddr >= ptoa((vm_paddr_t)Maxmem) && + attr == VM_MEMATTR_DEFAULT) { + *vaddr = malloc(dmat->common.maxsize, M_DEVBUF, mflags); + } else if (dmat->common.nsegments >= btoc(dmat->common.maxsize) && + dmat->common.alignment <= PAGE_SIZE && + (dmat->common.boundary == 0 || + dmat->common.boundary >= dmat->common.lowaddr)) { + /* Page-based multi-segment allocations allowed */ + *vaddr = (void *)kmem_alloc_attr(kernel_arena, + dmat->common.maxsize, mflags, 0ul, dmat->common.lowaddr, + attr); + dmat->bounce_flags |= BUS_DMA_KMEM_ALLOC; + } else { + *vaddr = (void *)kmem_alloc_contig(kernel_arena, + dmat->common.maxsize, mflags, 0ul, dmat->common.lowaddr, + dmat->common.alignment != 0 ? dmat->common.alignment : 1ul, + dmat->common.boundary, attr); + dmat->bounce_flags |= BUS_DMA_KMEM_ALLOC; + } + if (*vaddr == NULL) { + CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", + __func__, dmat, dmat->common.flags, ENOMEM); + return (ENOMEM); + } else if (vtophys(*vaddr) & (dmat->common.alignment - 1)) { + printf("bus_dmamem_alloc failed to align memory properly.\n"); + } + CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", + __func__, dmat, dmat->common.flags, 0); + return (0); +} + +/* + * Free a piece of memory and it's allociated dmamap, that was allocated + * via bus_dmamem_alloc. Make the same choice for free/contigfree. + */ +static void +bounce_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 and the BUS_DMA_KMEM_ALLOC flag cleared if malloc() + * was used and set if kmem_alloc_contig() was used. + */ + if (map != NULL) + panic("bus_dmamem_free: Invalid map freed\n"); + if ((dmat->bounce_flags & BUS_DMA_KMEM_ALLOC) == 0) + free(vaddr, M_DEVBUF); + else + kmem_free(kernel_arena, (vm_offset_t)vaddr, + dmat->common.maxsize); + CTR3(KTR_BUSDMA, "%s: tag %p flags 0x%x", __func__, dmat, + dmat->bounce_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 != &nobounce_dmamap && map->pagesneeded == 0)) { + /* + * Count the number of bounce pages + * needed in order to complete this transfer + */ + curaddr = buf; + while (buflen != 0) { + sgsize = MIN(buflen, dmat->common.maxsegsz); + if (bus_dma_run_filter(&dmat->common, curaddr)) { + 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; + bus_size_t sg_len; + + if ((map != &nobounce_dmamap && map->pagesneeded == 0)) { + CTR4(KTR_BUSDMA, "lowaddr= %d Maxmem= %d, boundary= %d, " + "alignment= %d", dmat->common.lowaddr, + ptoa((vm_paddr_t)Maxmem), + dmat->common.boundary, dmat->common.alignment); + CTR3(KTR_BUSDMA, "map= %p, nobouncemap= %p, pagesneeded= %d", + map, &nobounce_dmamap, 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) { + sg_len = PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK); + if (pmap == kernel_pmap) + paddr = pmap_kextract(vaddr); + else + paddr = pmap_extract(pmap, vaddr); + if (bus_dma_run_filter(&dmat->common, paddr) != 0) { + sg_len = roundup2(sg_len, + dmat->common.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) +{ + bus_addr_t baddr, bmask; + int seg; + + /* + * Make sure we don't cross any boundaries. + */ + bmask = ~(dmat->common.boundary - 1); + if (dmat->common.boundary > 0) { + baddr = (curaddr + dmat->common.boundary) & bmask; + if (sgsize > (baddr - curaddr)) + sgsize = (baddr - curaddr); + } + + /* + * Insert chunk into a segment, coalescing with + * previous segment if possible. + */ + seg = *segp; + if (seg == -1) { + seg = 0; + segs[seg].ds_addr = curaddr; + segs[seg].ds_len = sgsize; + } else { + if (curaddr == segs[seg].ds_addr + segs[seg].ds_len && + (segs[seg].ds_len + sgsize) <= dmat->common.maxsegsz && + (dmat->common.boundary == 0 || + (segs[seg].ds_addr & bmask) == (curaddr & bmask))) + segs[seg].ds_len += sgsize; + else { + if (++seg >= dmat->common.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. + */ +static int +bounce_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_size_t sgsize; + bus_addr_t curaddr; + int error; + + if (map == NULL) + map = &nobounce_dmamap; + + if (segs == NULL) + segs = dmat->segments; + + if ((dmat->bounce_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->common.maxsegsz); + if (((dmat->bounce_flags & BUS_DMA_COULD_BOUNCE) != 0) && + map->pagesneeded != 0 && + bus_dma_run_filter(&dmat->common, 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? + */ + return (buflen != 0 ? EFBIG : 0); /* XXX better return value here? */ +} + +/* + * Utility function to load a linear buffer. segp contains + * the starting segment on entrace, and the ending segment on exit. + */ +static int +bounce_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, + bus_size_t buflen, pmap_t pmap, int flags, bus_dma_segment_t *segs, + int *segp) +{ + bus_size_t sgsize, max_sgsize; + bus_addr_t curaddr; + vm_offset_t vaddr; + int error; + + if (map == NULL) + map = &nobounce_dmamap; + + if (segs == NULL) + segs = dmat->segments; + + if ((dmat->bounce_flags & BUS_DMA_COULD_BOUNCE) != 0) { + _bus_dmamap_count_pages(dmat, map, pmap, buf, buflen, flags); + if (map->pagesneeded != 0) { + error = _bus_dmamap_reserve_pages(dmat, map, flags); + if (error) + return (error); + } + } + + vaddr = (vm_offset_t)buf; + while (buflen > 0) { + /* + * Get the physical address for this segment. + */ + if (pmap == kernel_pmap) + curaddr = pmap_kextract(vaddr); + else + curaddr = pmap_extract(pmap, vaddr); + + /* + * Compute the segment size, and adjust counts. + */ + max_sgsize = MIN(buflen, dmat->common.maxsegsz); + sgsize = PAGE_SIZE - ((vm_offset_t)curaddr & PAGE_MASK); + if (((dmat->bounce_flags & BUS_DMA_COULD_BOUNCE) != 0) && + map->pagesneeded != 0 && + bus_dma_run_filter(&dmat->common, curaddr)) { + sgsize = roundup2(sgsize, dmat->common.alignment); + sgsize = MIN(sgsize, max_sgsize); + curaddr = add_bounce_page(dmat, map, vaddr, curaddr, + sgsize); + } else { + sgsize = MIN(sgsize, max_sgsize); + } + sgsize = _bus_dmamap_addseg(dmat, map, curaddr, sgsize, segs, + segp); + if (sgsize == 0) + break; + vaddr += sgsize; + buflen -= sgsize; + } + + /* + * Did we fit? + */ + return (buflen != 0 ? EFBIG : 0); /* XXX better return value here? */ +} + +static void +bounce_bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map, + struct memdesc *mem, bus_dmamap_callback_t *callback, void *callback_arg) +{ + + if (map == NULL) + return; + map->mem = *mem; + map->dmat = dmat; + map->callback = callback; + map->callback_arg = callback_arg; +} + +static bus_dma_segment_t * +bounce_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 = dmat->segments; + return (segs); +} + +/* + * Release the mapping held by map. + */ +static void +bounce_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); + } +} + +static void +bounce_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, + bus_dmasync_op_t op) +{ + struct bounce_page *bpage; + + /* + * XXX ARM64TODO: + * This bus_dma implementation requires IO-Coherent architecutre. + * If IO-Coherency is not guaranteed, cache operations have to be + * added to this function. + */ + + if ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) { + /* + * Handle data bouncing. We might also + * want to add support for invalidating + * the caches on broken hardware + */ + CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x op 0x%x " + "performing bounce", __func__, dmat, + dmat->common.flags, op); + + if ((op & BUS_DMASYNC_PREWRITE) != 0) { + while (bpage != NULL) { + if (bpage->datavaddr != 0) { + bcopy((void *)bpage->datavaddr, + (void *)bpage->vaddr, + bpage->datacount); + } else { + physcopyout(bpage->dataaddr, + (void *)bpage->vaddr, + bpage->datacount); + } + bpage = STAILQ_NEXT(bpage, links); + } + dmat->bounce_zone->total_bounced++; + } + + if ((op & BUS_DMASYNC_POSTREAD) != 0) { + while (bpage != NULL) { + if (bpage->datavaddr != 0) { + bcopy((void *)bpage->vaddr, + (void *)bpage->datavaddr, + bpage->datacount); + } else { + physcopyin((void *)bpage->vaddr, + bpage->dataaddr, + bpage->datacount); + } + bpage = STAILQ_NEXT(bpage, links); + } + dmat->bounce_zone->total_bounced++; + } + } +} + +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->common.alignment <= bz->alignment) && + (dmat->common.lowaddr >= bz->lowaddr)) { + dmat->bounce_zone = bz; + return (0); + } + } + + if ((bz = (struct bounce_zone *)malloc(sizeof(*bz), M_DEVBUF, + 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->common.lowaddr; + bz->alignment = MAX(dmat->common.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"); + 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_UAUTO(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_DEVBUF, + M_NOWAIT | M_ZERO); + + if (bpage == NULL) + break; + bpage->vaddr = (vm_offset_t)contigmalloc(PAGE_SIZE, M_DEVBUF, + M_NOWAIT, 0ul, bz->lowaddr, PAGE_SIZE, 0); + if (bpage->vaddr == 0) { + free(bpage, M_DEVBUF); + 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 && map != &nobounce_dmamap, + ("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->common.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->dataaddr = addr; + 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->common.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->common.lockfunc)(dmat->common.lockfuncarg, BUS_DMA_LOCK); + bus_dmamap_load_mem(map->dmat, map, &map->mem, + map->callback, map->callback_arg, BUS_DMA_WAITOK); + (dmat->common.lockfunc)(dmat->common.lockfuncarg, + BUS_DMA_UNLOCK); + mtx_lock(&bounce_lock); + } + mtx_unlock(&bounce_lock); +} + +struct bus_dma_impl bus_dma_bounce_impl = { + .tag_create = bounce_bus_dma_tag_create, + .tag_destroy = bounce_bus_dma_tag_destroy, + .map_create = bounce_bus_dmamap_create, + .map_destroy = bounce_bus_dmamap_destroy, + .mem_alloc = bounce_bus_dmamem_alloc, + .mem_free = bounce_bus_dmamem_free, + .load_phys = bounce_bus_dmamap_load_phys, + .load_buffer = bounce_bus_dmamap_load_buffer, + .load_ma = bus_dmamap_load_ma_triv, + .map_waitok = bounce_bus_dmamap_waitok, + .map_complete = bounce_bus_dmamap_complete, + .map_unload = bounce_bus_dmamap_unload, + .map_sync = bounce_bus_dmamap_sync +}; diff --git a/sys/arm64/arm64/busdma_machdep.c b/sys/arm64/arm64/busdma_machdep.c index 4a89b1f..df7a8be 100644 --- a/sys/arm64/arm64/busdma_machdep.c +++ b/sys/arm64/arm64/busdma_machdep.c @@ -1,22 +1,292 @@ -/* $FreeBSD$ */ +/*- + * Copyright (c) 1997, 1998 Justin T. Gibbs. + * Copyright (c) 2013, 2015 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by Konstantin Belousov <kib@FreeBSD.org> + * under sponsorship from the FreeBSD Foundation. + * + * Portions of this software were developed by Semihalf + * under sponsorship of the FreeBSD Foundation. + * + * 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. + */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> - +#include <sys/malloc.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/ktr.h> +#include <sys/lock.h> +#include <sys/memdesc.h> +#include <sys/mutex.h> +#include <sys/uio.h> #include <vm/vm.h> +#include <vm/vm_extern.h> #include <vm/pmap.h> #include <machine/bus.h> +#include <arm64/include/bus_dma_impl.h> + +/* + * 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. + */ +void +bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op) +{ + + panic("driver error: busdma dflt_lock called"); +} + +/* + * 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. + */ +int +bus_dma_run_filter(struct bus_dma_tag_common *tc, bus_addr_t paddr) +{ + int retval; + + retval = 0; + do { + if (((paddr > tc->lowaddr && paddr <= tc->highaddr) || + ((paddr & (tc->alignment - 1)) != 0)) && + (tc->filter == NULL || + (*tc->filter)(tc->filterarg, paddr) != 0)) + retval = 1; + + tc = tc->parent; + } while (retval == 0 && tc != NULL); + return (retval); +} + +int +common_bus_dma_tag_create(struct bus_dma_tag_common *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, size_t sz, void **dmat) +{ + void *newtag; + struct bus_dma_tag_common *common; + + KASSERT(sz >= sizeof(struct bus_dma_tag_common), ("sz")); + /* Return a NULL tag on failure */ + *dmat = NULL; + /* Basic sanity checking */ + if (boundary != 0 && boundary < maxsegsz) + maxsegsz = boundary; + if (maxsegsz == 0) + return (EINVAL); + + newtag = malloc(sz, M_DEVBUF, M_ZERO | M_NOWAIT); + if (newtag == NULL) { + CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d", + __func__, newtag, 0, ENOMEM); + return (ENOMEM); + } + + common = newtag; + common->impl = &bus_dma_bounce_impl; + common->parent = parent; + common->alignment = alignment; + common->boundary = boundary; + common->lowaddr = trunc_page((vm_paddr_t)lowaddr) + (PAGE_SIZE - 1); + common->highaddr = trunc_page((vm_paddr_t)highaddr) + (PAGE_SIZE - 1); + common->filter = filter; + common->filterarg = filterarg; + common->maxsize = maxsize; + common->nsegments = nsegments; + common->maxsegsz = maxsegsz; + common->flags = flags; + common->ref_count = 1; /* Count ourself */ + if (lockfunc != NULL) { + common->lockfunc = lockfunc; + common->lockfuncarg = lockfuncarg; + } else { + common->lockfunc = bus_dma_dflt_lock; + common->lockfuncarg = NULL; + } + + /* Take into account any restrictions imposed by our parent tag */ + if (parent != NULL) { + common->impl = parent->impl; + common->lowaddr = MIN(parent->lowaddr, common->lowaddr); + common->highaddr = MAX(parent->highaddr, common->highaddr); + if (common->boundary == 0) + common->boundary = parent->boundary; + else if (parent->boundary != 0) { + common->boundary = MIN(parent->boundary, + common->boundary); + } + if (common->filter == NULL) { + /* + * Short circuit looking at our parent directly + * since we have encapsulated all of its information + */ + common->filter = parent->filter; + common->filterarg = parent->filterarg; + common->parent = parent->parent; + } + atomic_add_int(&parent->ref_count, 1); + } + *dmat = common; + return (0); +} + +/* + * 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) +{ + struct bus_dma_tag_common *tc; + int error; + + if (parent == NULL) { + error = bus_dma_bounce_impl.tag_create(parent, alignment, + boundary, lowaddr, highaddr, filter, filterarg, maxsize, + nsegments, maxsegsz, flags, lockfunc, lockfuncarg, dmat); + } else { + tc = (struct bus_dma_tag_common *)parent; + error = tc->impl->tag_create(parent, alignment, + boundary, lowaddr, highaddr, filter, filterarg, maxsize, + nsegments, maxsegsz, flags, lockfunc, lockfuncarg, dmat); + } + return (error); +} + +int +bus_dma_tag_destroy(bus_dma_tag_t dmat) +{ + struct bus_dma_tag_common *tc; + + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->tag_destroy(dmat)); +} + +/* + * 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) +{ + struct bus_dma_tag_common *tc; + + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->map_create(dmat, flags, mapp)); +} + +/* + * 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) +{ + struct bus_dma_tag_common *tc; + + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->map_destroy(dmat, map)); +} + + +/* + * Allocate a piece of memory that can be efficiently mapped into + * bus device space based on the constraints listed 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) +{ + struct bus_dma_tag_common *tc; + + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->mem_alloc(dmat, vaddr, flags, mapp)); +} + +/* + * Free a piece of memory and it's allociated 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 bus_dma_tag_common *tc; + + tc = (struct bus_dma_tag_common *)dmat; + tc->impl->mem_free(dmat, vaddr, map); +} 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) { + struct bus_dma_tag_common *tc; - panic("_bus_dmamap_load_phys"); + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->load_phys(dmat, map, buf, buflen, flags, segs, + segp)); } int @@ -24,8 +294,11 @@ _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) { + struct bus_dma_tag_common *tc; - panic("_bus_dmamap_load_ma"); + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->load_ma(dmat, map, ma, tlen, ma_offs, flags, + segs, segp)); } int @@ -33,36 +306,50 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, bus_size_t buflen, pmap_t pmap, int flags, bus_dma_segment_t *segs, int *segp) { + struct bus_dma_tag_common *tc; - panic("_bus_dmamap_load_buffer"); + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->load_buffer(dmat, map, buf, buflen, pmap, flags, segs, + segp)); } void __bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map, struct memdesc *mem, bus_dmamap_callback_t *callback, void *callback_arg) { + struct bus_dma_tag_common *tc; - panic("__bus_dmamap_waitok"); + tc = (struct bus_dma_tag_common *)dmat; + tc->impl->map_waitok(dmat, map, mem, callback, 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) { + struct bus_dma_tag_common *tc; - panic("_bus_dmamap_complete"); + tc = (struct bus_dma_tag_common *)dmat; + return (tc->impl->map_complete(dmat, map, segs, nsegs, error)); } +/* + * Release the mapping held by map. + */ void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map) { + struct bus_dma_tag_common *tc; - panic("_bus_dmamap_unload"); + tc = (struct bus_dma_tag_common *)dmat; + tc->impl->map_unload(dmat, map); } void _bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op) { + struct bus_dma_tag_common *tc; - panic("_bus_dmamap_sync"); + tc = (struct bus_dma_tag_common *)dmat; + tc->impl->map_sync(dmat, map, op); } diff --git a/sys/arm64/include/bus_dma_impl.h b/sys/arm64/include/bus_dma_impl.h new file mode 100644 index 0000000..354290e --- /dev/null +++ b/sys/arm64/include/bus_dma_impl.h @@ -0,0 +1,96 @@ +/*- + * Copyright (c) 2013 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by Konstantin Belousov <kib@FreeBSD.org> + * under sponsorship from the FreeBSD Foundation. + * + * 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. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_BUS_DMA_IMPL_H_ +#define _MACHINE_BUS_DMA_IMPL_H_ + +struct bus_dma_tag_common { + struct bus_dma_impl *impl; + struct bus_dma_tag_common *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; + bus_dma_lock_t *lockfunc; + void *lockfuncarg; + int ref_count; +}; + +struct bus_dma_impl { + int (*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); + int (*tag_destroy)(bus_dma_tag_t dmat); + int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp); + int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map); + int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags, + bus_dmamap_t *mapp); + void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map); + int (*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); + int (*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); + int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map, + void *buf, bus_size_t buflen, pmap_t pmap, int flags, + bus_dma_segment_t *segs, int *segp); + void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map, + struct memdesc *mem, bus_dmamap_callback_t *callback, + void *callback_arg); + bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map, + bus_dma_segment_t *segs, int nsegs, int error); + void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map); + void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map, + bus_dmasync_op_t op); +}; + +void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op); +int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr); +int common_bus_dma_tag_create(struct bus_dma_tag_common *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, size_t sz, void **dmat); + +extern struct bus_dma_impl bus_dma_bounce_impl; + +#endif diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64 index f80fecd..9b1ff0d 100644 --- a/sys/conf/files.arm64 +++ b/sys/conf/files.arm64 @@ -5,6 +5,7 @@ arm64/arm64/autoconf.c standard arm64/arm64/bcopy.c standard arm64/arm64/bus_machdep.c standard arm64/arm64/bus_space_asm.S standard +arm64/arm64/busdma_bounce.c standard arm64/arm64/busdma_machdep.c standard arm64/arm64/clock.c standard arm64/arm64/copyinout.S standard |
