Date: Wed, 7 Jul 2010 02:16:47 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r209754 - in projects/altix/sys: ia64/ia64 ia64/include kern Message-ID: <201007070216.o672GlV6051965@svn.freebsd.org>
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Author: marcel Date: Wed Jul 7 02:16:47 2010 New Revision: 209754 URL: http://svn.freebsd.org/changeset/base/209754 Log: Switch ia64 to the unified busdma implementation. Modified: projects/altix/sys/ia64/ia64/busdma_machdep.c projects/altix/sys/ia64/include/bus_dma.h projects/altix/sys/ia64/include/md_var.h projects/altix/sys/kern/subr_busdma.c Modified: projects/altix/sys/ia64/ia64/busdma_machdep.c ============================================================================== --- projects/altix/sys/ia64/ia64/busdma_machdep.c Wed Jul 7 00:03:06 2010 (r209753) +++ projects/altix/sys/ia64/ia64/busdma_machdep.c Wed Jul 7 02:16:47 2010 (r209754) @@ -26,980 +26,3 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/lock.h> -#include <sys/mutex.h> -#include <sys/bus.h> -#include <sys/interrupt.h> -#include <sys/proc.h> -#include <sys/uio.h> -#include <sys/sysctl.h> - -#include <vm/vm.h> -#include <vm/vm_page.h> -#include <vm/vm_map.h> - -#include <machine/atomic.h> -#include <machine/bus.h> -#include <machine/md_var.h> - -#define MAX_BPAGES 1024 - -struct bus_dma_tag { - bus_dma_tag_t parent; - bus_size_t alignment; - bus_size_t boundary; - bus_addr_t lowaddr; - bus_addr_t highaddr; - bus_dma_filter_t *filter; - void *filterarg; - bus_size_t maxsize; - u_int nsegments; - bus_size_t maxsegsz; - int flags; - int ref_count; - int map_count; - bus_dma_lock_t *lockfunc; - void *lockfuncarg; - bus_dma_segment_t *segments; -}; - -struct bounce_page { - vm_offset_t vaddr; /* kva of bounce buffer */ - bus_addr_t busaddr; /* Physical address */ - vm_offset_t datavaddr; /* kva of client data */ - bus_size_t datacount; /* client data count */ - STAILQ_ENTRY(bounce_page) links; -}; - -u_int busdma_swi_pending; - -static struct mtx bounce_lock; -static STAILQ_HEAD(bp_list, bounce_page) bounce_page_list; -static int free_bpages; -static int reserved_bpages; -static int active_bpages; -static int total_bpages; -static int total_bounced; -static int total_deferred; - -SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters"); -SYSCTL_INT(_hw_busdma, OID_AUTO, free_bpages, CTLFLAG_RD, &free_bpages, 0, - "Free bounce pages"); -SYSCTL_INT(_hw_busdma, OID_AUTO, reserved_bpages, CTLFLAG_RD, &reserved_bpages, - 0, "Reserved bounce pages"); -SYSCTL_INT(_hw_busdma, OID_AUTO, active_bpages, CTLFLAG_RD, &active_bpages, 0, - "Active bounce pages"); -SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0, - "Total bounce pages"); -SYSCTL_INT(_hw_busdma, OID_AUTO, total_bounced, CTLFLAG_RD, &total_bounced, 0, - "Total bounce requests"); -SYSCTL_INT(_hw_busdma, OID_AUTO, total_deferred, CTLFLAG_RD, &total_deferred, 0, - "Total bounce requests that were deferred"); - -struct bus_dmamap { - struct bp_list bpages; - int pagesneeded; - int pagesreserved; - bus_dma_tag_t dmat; - void *buf; /* unmapped buffer pointer */ - bus_size_t buflen; /* unmapped buffer length */ - bus_dmamap_callback_t *callback; - void *callback_arg; - STAILQ_ENTRY(bus_dmamap) links; -}; - -static STAILQ_HEAD(, bus_dmamap) bounce_map_waitinglist; -static STAILQ_HEAD(, bus_dmamap) bounce_map_callbacklist; -static struct bus_dmamap nobounce_dmamap; - -static void init_bounce_pages(void *dummy); -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_size_t size); -static void free_bounce_page(bus_dma_tag_t dmat, struct bounce_page *bpage); -static __inline int run_filter(bus_dma_tag_t dmat, bus_addr_t paddr, - bus_size_t len); - -/* - * 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 __inline int -run_filter(bus_dma_tag_t dmat, bus_addr_t paddr, bus_size_t len) -{ - bus_size_t bndy; - int retval; - - retval = 0; - bndy = dmat->boundary; - - do { - if (((paddr > dmat->lowaddr && paddr <= dmat->highaddr) - || ((paddr & (dmat->alignment - 1)) != 0) - || ((paddr & bndy) != ((paddr + len) & bndy))) - && (dmat->filter == NULL - || (*dmat->filter)(dmat->filterarg, paddr) != 0)) - retval = 1; - - dmat = dmat->parent; - } while (retval == 0 && dmat != NULL); - return (retval); -} - -/* - * 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) -{ - panic("driver error: busdma dflt_lock called"); -} - -#define BUS_DMA_MIN_ALLOC_COMP BUS_DMA_BUS4 -/* - * Allocate a device specific dma_tag. - */ -int -bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment, - bus_size_t boundary, bus_addr_t lowaddr, - bus_addr_t highaddr, bus_dma_filter_t *filter, - void *filterarg, bus_size_t maxsize, int nsegments, - bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, - void *lockfuncarg, bus_dma_tag_t *dmat) -{ - bus_dma_tag_t newtag; - int error = 0; - - /* Basic sanity checking */ - if (boundary != 0 && boundary < maxsegsz) - maxsegsz = boundary; - - /* Return a NULL tag on failure */ - *dmat = NULL; - - newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_DEVBUF, M_NOWAIT); - if (newtag == NULL) - return (ENOMEM); - - newtag->parent = parent; - newtag->alignment = alignment; - newtag->boundary = boundary; - newtag->lowaddr = trunc_page(lowaddr) + (PAGE_SIZE - 1); - newtag->highaddr = trunc_page(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; - if (lockfunc != NULL) { - newtag->lockfunc = lockfunc; - newtag->lockfuncarg = lockfuncarg; - } else { - newtag->lockfunc = dflt_lock; - newtag->lockfuncarg = NULL; - } - newtag->segments = NULL; - - /* Take into account any restrictions imposed by our parent tag */ - if (parent != NULL) { - newtag->lowaddr = MIN(parent->lowaddr, newtag->lowaddr); - newtag->highaddr = MAX(parent->highaddr, newtag->highaddr); - if (newtag->boundary == 0) - newtag->boundary = parent->boundary; - else if (parent->boundary != 0) - newtag->boundary = MIN(parent->boundary, - newtag->boundary); - if (newtag->filter == NULL) { - /* - * 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 (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) { - /* Must bounce */ - - if (ptoa(total_bpages) < maxsize) { - int pages; - - pages = atop(maxsize) - total_bpages; - - /* Add pages to our bounce pool */ - if (alloc_bounce_pages(newtag, pages) < pages) - error = ENOMEM; - } - /* Performed initial allocation */ - newtag->flags |= BUS_DMA_MIN_ALLOC_COMP; - } - - if (error != 0) { - free(newtag, M_DEVBUF); - } else { - *dmat = newtag; - } - return (error); -} - -int -bus_dma_tag_destroy(bus_dma_tag_t dmat) -{ - if (dmat != NULL) { - - if (dmat->map_count != 0) - return (EBUSY); - - while (dmat != NULL) { - bus_dma_tag_t parent; - - parent = dmat->parent; - atomic_subtract_int(&dmat->ref_count, 1); - if (dmat->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; - } - } - return (0); -} - -/* - * Allocate a handle for mapping from kva/uva/physical - * address space into bus device space. - */ -int -bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp) -{ - int error; - - error = 0; - - if (dmat->segments == NULL) { - dmat->segments = (bus_dma_segment_t *)malloc( - sizeof(bus_dma_segment_t) * dmat->nsegments, M_DEVBUF, - M_NOWAIT); - if (dmat->segments == NULL) - 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->lowaddr < ptoa(Maxmem)) { - /* Must bounce */ - int maxpages; - - *mapp = (bus_dmamap_t)malloc(sizeof(**mapp), M_DEVBUF, - M_NOWAIT | M_ZERO); - if (*mapp == NULL) - 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. - */ - maxpages = MIN(MAX_BPAGES, Maxmem - atop(dmat->lowaddr)); - if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0 - || (dmat->map_count > 0 && total_bpages < maxpages)) { - int pages; - - pages = MAX(atop(dmat->maxsize), 1); - pages = MIN(maxpages - total_bpages, pages); - if (alloc_bounce_pages(dmat, pages) < pages) - error = ENOMEM; - - if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) { - if (error == 0) - dmat->flags |= BUS_DMA_MIN_ALLOC_COMP; - } else { - error = 0; - } - } - } else { - *mapp = NULL; - } - if (error == 0) - dmat->map_count++; - return (error); -} - -/* - * Destroy a handle for mapping from kva/uva/physical - * address space into bus device space. - */ -int -bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map) -{ - - if (map != NULL && map != &nobounce_dmamap) { - if (STAILQ_FIRST(&map->bpages) != NULL) - return (EBUSY); - free(map, M_DEVBUF); - } - dmat->map_count--; - return (0); -} - - -/* - * Allocate a piece of memory that can be efficiently mapped into - * bus device space based on the constraints lited in the dma tag. - * A dmamap to for use with dmamap_load is also allocated. - */ -int -bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, - bus_dmamap_t *mapp) -{ - 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->nsegments, M_DEVBUF, - mflags); - if (dmat->segments == NULL) - return (ENOMEM); - } - if (flags & BUS_DMA_ZERO) - mflags |= M_ZERO; - - /* - * 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->maxsize <= PAGE_SIZE) && - (dmat->alignment < dmat->maxsize) && - dmat->lowaddr >= ptoa(Maxmem)) { - *vaddr = malloc(dmat->maxsize, M_DEVBUF, mflags); - } else { - /* - * XXX Use Contigmalloc until it is merged into this facility - * and handles multi-seg allocations. Nobody is doing - * multi-seg allocations yet though. - * XXX Certain AGP hardware does. - */ - *vaddr = contigmalloc(dmat->maxsize, M_DEVBUF, mflags, - 0ul, dmat->lowaddr, dmat->alignment? dmat->alignment : 1ul, - dmat->boundary); - } - if (*vaddr == NULL) - return (ENOMEM); - else if ((uintptr_t)*vaddr & (dmat->alignment - 1)) - printf("bus_dmamem_alloc failed to align memory properly.\n"); - 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. - */ -void -bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map) -{ - /* - * dmamem does not need to be bounced, so the map should be - * NULL - */ - if (map != NULL) - panic("bus_dmamem_free: Invalid map freed\n"); - if ((dmat->maxsize <= PAGE_SIZE) && - (dmat->alignment < dmat->maxsize) && - dmat->lowaddr >= ptoa(Maxmem)) - free(vaddr, M_DEVBUF); - else { - contigfree(vaddr, dmat->maxsize, M_DEVBUF); - } -} - -/* - * Utility function to load a linear buffer. lastaddrp holds state - * between invocations (for multiple-buffer loads). segp contains - * the starting segment on entrace, and the ending segment on exit. - * first indicates if this is the first invocation of this function. - */ -static int -_bus_dmamap_load_buffer(bus_dma_tag_t dmat, - bus_dmamap_t map, - void *buf, bus_size_t buflen, - struct thread *td, - int flags, - bus_addr_t *lastaddrp, - bus_dma_segment_t *segs, - int *segp, - int first) -{ - bus_size_t sgsize; - bus_addr_t curaddr, lastaddr, baddr, bmask; - vm_offset_t vaddr; - bus_addr_t paddr; - int seg; - pmap_t pmap; - - if (map == NULL) - map = &nobounce_dmamap; - - if (td != NULL) - pmap = vmspace_pmap(td->td_proc->p_vmspace); - else - pmap = NULL; - - if ((dmat->lowaddr < ptoa(Maxmem) || dmat->boundary > 0 || - dmat->alignment > 1) && map != &nobounce_dmamap && - map->pagesneeded == 0) { - vm_offset_t vendaddr; - - /* - * Count the number of bounce pages - * needed in order to complete this transfer - */ - vaddr = trunc_page((vm_offset_t)buf); - vendaddr = (vm_offset_t)buf + buflen; - - while (vaddr < vendaddr) { - if (pmap != NULL) - paddr = pmap_extract(pmap, vaddr); - else - paddr = pmap_kextract(vaddr); - if (run_filter(dmat, paddr, 0) != 0) - map->pagesneeded++; - vaddr += PAGE_SIZE; - } - } - - vaddr = (vm_offset_t)buf; - - /* Reserve Necessary Bounce Pages */ - if (map->pagesneeded != 0) { - 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 */ - map->dmat = dmat; - map->buf = buf; - map->buflen = buflen; - STAILQ_INSERT_TAIL(&bounce_map_waitinglist, - map, links); - mtx_unlock(&bounce_lock); - return (EINPROGRESS); - } - } - mtx_unlock(&bounce_lock); - } - - lastaddr = *lastaddrp; - bmask = ~(dmat->boundary - 1); - - for (seg = *segp; buflen > 0 ; ) { - /* - * Get the physical address for this segment. - */ - if (pmap) - curaddr = pmap_extract(pmap, vaddr); - else - curaddr = pmap_kextract(vaddr); - - /* - * Compute the segment size, and adjust counts. - */ - sgsize = PAGE_SIZE - ((u_long)curaddr & PAGE_MASK); - if (sgsize > dmat->maxsegsz) - sgsize = dmat->maxsegsz; - if (buflen < sgsize) - sgsize = buflen; - - /* - * Make sure we don't cross any boundaries. - */ - if (dmat->boundary > 0) { - baddr = (curaddr + dmat->boundary) & bmask; - if (sgsize > (baddr - curaddr)) - sgsize = (baddr - curaddr); - } - - if (map->pagesneeded != 0 && run_filter(dmat, curaddr, sgsize)) - curaddr = add_bounce_page(dmat, map, vaddr, sgsize); - - /* - * Insert chunk into a segment, coalescing with - * previous segment if possible. - */ - if (first) { - segs[seg].ds_addr = curaddr; - segs[seg].ds_len = sgsize; - first = 0; - } else { - if (curaddr == lastaddr && - (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) - break; - segs[seg].ds_addr = curaddr; - segs[seg].ds_len = sgsize; - } - } - - lastaddr = curaddr + sgsize; - vaddr += sgsize; - buflen -= sgsize; - } - - *segp = seg; - *lastaddrp = lastaddr; - - /* - * Did we fit? - */ - return (buflen != 0 ? EFBIG : 0); /* XXX better return value here? */ -} - -/* - * Map the buffer buf into bus space using the dmamap map. - */ -int -bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, - bus_size_t buflen, bus_dmamap_callback_t *callback, - void *callback_arg, int flags) -{ - bus_addr_t lastaddr = 0; - int error, nsegs = 0; - - if (map != NULL) { - flags |= BUS_DMA_WAITOK; - map->callback = callback; - map->callback_arg = callback_arg; - } - - error = _bus_dmamap_load_buffer(dmat, map, buf, buflen, NULL, flags, - &lastaddr, dmat->segments, &nsegs, 1); - - if (error == EINPROGRESS) - return (error); - - if (error) - (*callback)(callback_arg, dmat->segments, 0, error); - else - (*callback)(callback_arg, dmat->segments, nsegs + 1, 0); - - return (0); -} - -/* - * Like _bus_dmamap_load(), but for mbufs. - */ -int -bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, - struct mbuf *m0, - bus_dmamap_callback2_t *callback, void *callback_arg, - int flags) -{ - int nsegs, error; - - M_ASSERTPKTHDR(m0); - - flags |= BUS_DMA_NOWAIT; - nsegs = 0; - error = 0; - if (m0->m_pkthdr.len <= dmat->maxsize) { - int first = 1; - bus_addr_t lastaddr = 0; - struct mbuf *m; - - for (m = m0; m != NULL && error == 0; m = m->m_next) { - if (m->m_len > 0) { - error = _bus_dmamap_load_buffer(dmat, map, - m->m_data, m->m_len, - NULL, flags, &lastaddr, - dmat->segments, &nsegs, first); - first = 0; - } - } - } else { - error = EINVAL; - } - - if (error) { - /* force "no valid mappings" in callback */ - (*callback)(callback_arg, dmat->segments, 0, 0, error); - } else { - (*callback)(callback_arg, dmat->segments, nsegs + 1, - m0->m_pkthdr.len, error); - } - return (error); -} - -int -bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, - struct mbuf *m0, bus_dma_segment_t *segs, - int *nsegs, int flags) -{ - int error; - - M_ASSERTPKTHDR(m0); - - flags |= BUS_DMA_NOWAIT; - *nsegs = 0; - error = 0; - if (m0->m_pkthdr.len <= dmat->maxsize) { - int first = 1; - bus_addr_t lastaddr = 0; - struct mbuf *m; - - for (m = m0; m != NULL && error == 0; m = m->m_next) { - if (m->m_len > 0) { - error = _bus_dmamap_load_buffer(dmat, map, - m->m_data, m->m_len, - NULL, flags, &lastaddr, - segs, nsegs, first); - first = 0; - } - } - ++*nsegs; - } else { - error = EINVAL; - } - - return (error); -} - -/* - * Like _bus_dmamap_load(), but for uios. - */ -int -bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, - struct uio *uio, - bus_dmamap_callback2_t *callback, void *callback_arg, - int flags) -{ - bus_addr_t lastaddr; - int nsegs, error, first, i; - bus_size_t resid; - struct iovec *iov; - struct thread *td = NULL; - - flags |= BUS_DMA_NOWAIT; - resid = uio->uio_resid; - iov = uio->uio_iov; - - if (uio->uio_segflg == UIO_USERSPACE) { - td = uio->uio_td; - KASSERT(td != NULL, - ("bus_dmamap_load_uio: USERSPACE but no proc")); - } - - nsegs = 0; - error = 0; - first = 1; - for (i = 0; i < uio->uio_iovcnt && resid != 0 && !error; i++) { - /* - * Now at the first iovec to load. Load each iovec - * until we have exhausted the residual count. - */ - bus_size_t minlen = - resid < iov[i].iov_len ? resid : iov[i].iov_len; - caddr_t addr = (caddr_t) iov[i].iov_base; - - if (minlen > 0) { - error = _bus_dmamap_load_buffer(dmat, map, addr, - minlen, td, flags, &lastaddr, dmat->segments, - &nsegs, first); - first = 0; - - resid -= minlen; - } - } - - if (error) { - /* force "no valid mappings" in callback */ - (*callback)(callback_arg, dmat->segments, 0, 0, error); - } else { - (*callback)(callback_arg, dmat->segments, nsegs + 1, - uio->uio_resid, error); - } - return (error); -} - -/* - * Release the mapping held by map. - */ -void -_bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map) -{ - struct bounce_page *bpage; - - while ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) { - STAILQ_REMOVE_HEAD(&map->bpages, links); - free_bounce_page(dmat, bpage); - } -} - -void -_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op) -{ - struct bounce_page *bpage; - - if ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) { - /* - * Handle data bouncing. We might also - * want to add support for invalidating - * the caches on broken hardware - */ - - if (op & BUS_DMASYNC_PREWRITE) { - while (bpage != NULL) { - bcopy((void *)bpage->datavaddr, - (void *)bpage->vaddr, - bpage->datacount); - bpage = STAILQ_NEXT(bpage, links); - } - total_bounced++; - } - - if (op & BUS_DMASYNC_POSTREAD) { - while (bpage != NULL) { - bcopy((void *)bpage->vaddr, - (void *)bpage->datavaddr, - bpage->datacount); - bpage = STAILQ_NEXT(bpage, links); - } - total_bounced++; - } - } -} - -static void -init_bounce_pages(void *dummy __unused) -{ - - free_bpages = 0; - reserved_bpages = 0; - active_bpages = 0; - total_bpages = 0; - STAILQ_INIT(&bounce_page_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 int -alloc_bounce_pages(bus_dma_tag_t dmat, u_int numpages) -{ - int count; - - 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, - dmat->lowaddr, - PAGE_SIZE, - dmat->boundary); - if (bpage->vaddr == 0) { - free(bpage, M_DEVBUF); - break; - } - bpage->busaddr = pmap_kextract(bpage->vaddr); - mtx_lock(&bounce_lock); - STAILQ_INSERT_TAIL(&bounce_page_list, bpage, links); - total_bpages++; - 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) -{ - int pages; - - mtx_assert(&bounce_lock, MA_OWNED); - pages = MIN(free_bpages, map->pagesneeded - map->pagesreserved); - if (commit == 0 && map->pagesneeded > (map->pagesreserved + pages)) - return (map->pagesneeded - (map->pagesreserved + pages)); - free_bpages -= pages; - 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_size_t size) -{ - struct bounce_page *bpage; - - KASSERT(map != NULL && map != &nobounce_dmamap, - ("add_bounce_page: bad map %p", map)); - - 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(&bounce_page_list); - if (bpage == NULL) - panic("add_bounce_page: free page list is empty"); - - STAILQ_REMOVE_HEAD(&bounce_page_list, links); - reserved_bpages--; - active_bpages++; - mtx_unlock(&bounce_lock); - - if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) { - /* Page offset needs to be preserved. */ - bpage->vaddr |= vaddr & PAGE_MASK; - bpage->busaddr |= vaddr & PAGE_MASK; - } - bpage->datavaddr = vaddr; - bpage->datacount = size; - STAILQ_INSERT_TAIL(&(map->bpages), bpage, links); - return (bpage->busaddr); -} - -static void -free_bounce_page(bus_dma_tag_t dmat, struct bounce_page *bpage) -{ - struct bus_dmamap *map; - - 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(&bounce_page_list, bpage, links); - free_bpages++; - 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; - 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(map->dmat, map, map->buf, map->buflen, - map->callback, map->callback_arg, /*flags*/0); - (dmat->lockfunc)(dmat->lockfuncarg, BUS_DMA_UNLOCK); - mtx_lock(&bounce_lock); - } - mtx_unlock(&bounce_lock); -} Modified: projects/altix/sys/ia64/include/bus_dma.h ============================================================================== --- projects/altix/sys/ia64/include/bus_dma.h Wed Jul 7 00:03:06 2010 (r209753) +++ projects/altix/sys/ia64/include/bus_dma.h Wed Jul 7 02:16:47 2010 (r209754) @@ -30,4 +30,8 @@ #include <sys/bus_dma.h> +#define BUSDMA_MAX_BPAGES 1024 + +#define bus_dma_tag_parent(x) x + #endif /* _IA64_BUS_DMA_H_ */ Modified: projects/altix/sys/ia64/include/md_var.h ============================================================================== --- projects/altix/sys/ia64/include/md_var.h Wed Jul 7 00:03:06 2010 (r209753) +++ projects/altix/sys/ia64/include/md_var.h Wed Jul 7 02:16:47 2010 (r209754) @@ -76,7 +76,7 @@ struct ia64_init_return { extern uint64_t ia64_lapic_addr; extern long Maxmem; *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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