From 422fd73258c5d6fdba9e40fd1dcd43148768589f Mon Sep 17 00:00:00 2001 From: nathanw Date: Wed, 8 Mar 2006 15:18:39 +0000 Subject: [PATCH] This copy of bus_dma.c is unused; evbppc ports have referenced powerpc/powerpc/bus_dma.c for over two years. --- sys/arch/evbppc/evbppc/bus_dma.c | 663 ------------------------------- 1 file changed, 663 deletions(-) delete mode 100644 sys/arch/evbppc/evbppc/bus_dma.c diff --git a/sys/arch/evbppc/evbppc/bus_dma.c b/sys/arch/evbppc/evbppc/bus_dma.c deleted file mode 100644 index 1a128d2d49c6..000000000000 --- a/sys/arch/evbppc/evbppc/bus_dma.c +++ /dev/null @@ -1,663 +0,0 @@ -/* $NetBSD: bus_dma.c,v 1.12 2006/03/01 12:38:11 yamt Exp $ */ - -/*- - * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, - * NASA Ames Research Center. - * - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the NetBSD - * Foundation, Inc. and its contributors. - * 4. Neither the name of The NetBSD Foundation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 -__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.12 2006/03/01 12:38:11 yamt Exp $"); - -#include -#include -#include -#include -#include -#include -#include - -#include - -#define _IBM4XX_BUS_DMA_PRIVATE -#include -#include - -int _bus_dmamap_load_buffer(bus_dma_tag_t, bus_dmamap_t, void *, - bus_size_t, struct vmspace *, int, paddr_t *, int *, int); - -/* - * Common function for DMA map creation. May be called by bus-specific - * DMA map creation functions. - */ -int -_bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments, - bus_size_t maxsegsz, bus_size_t boundary, int flags, - bus_dmamap_t *dmamp) -{ - struct ibm4xx_bus_dmamap *map; - void *mapstore; - size_t mapsize; - - /* - * Allocate and initialize the DMA map. The end of the map - * is a variable-sized array of segments, so we allocate enough - * room for them in one shot. - * - * Note we don't preserve the WAITOK or NOWAIT flags. Preservation - * of ALLOCNOW notifies others that we've reserved these resources, - * and they are not to be freed. - * - * The bus_dmamap_t includes one bus_dma_segment_t, hence - * the (nsegments - 1). - */ - mapsize = sizeof(struct ibm4xx_bus_dmamap) + - (sizeof(bus_dma_segment_t) * (nsegments - 1)); - if ((mapstore = malloc(mapsize, M_DMAMAP, - (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) - return (ENOMEM); - - memset(mapstore, 0, mapsize); - map = (struct ibm4xx_bus_dmamap *)mapstore; - map->_dm_size = size; - map->_dm_segcnt = nsegments; - map->_dm_maxmaxsegsz = maxsegsz; - map->_dm_boundary = boundary; - map->_dm_bounce_thresh = t->_bounce_thresh; - map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT); - map->dm_maxsegsz = maxsegsz; - map->dm_mapsize = 0; /* no valid mappings */ - map->dm_nsegs = 0; - - *dmamp = map; - return (0); -} - -/* - * Common function for DMA map destruction. May be called by bus-specific - * DMA map destruction functions. - */ -void -_bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map) -{ - - free(map, M_DMAMAP); -} - -/* - * Utility function to load a linear buffer. lastaddrp holds state - * between invocations (for multiple-buffer loads). segp contains - * the starting segment on entrance, and the ending segment on exit. - * first indicates if this is the first invocation of this function. - */ -int -_bus_dmamap_load_buffer(bus_dma_tag_t t, bus_dmamap_t map, void *buf, - bus_size_t buflen, struct vmspace *vm, int flags, - paddr_t *lastaddrp, int *segp, int first) -{ - bus_size_t sgsize; - bus_addr_t curaddr, lastaddr, baddr, bmask; - vaddr_t vaddr = (vaddr_t)buf; - int seg; - - lastaddr = *lastaddrp; - bmask = ~(map->_dm_boundary - 1); - - for (seg = *segp; buflen > 0 ; ) { - /* - * Get the physical address for this segment. - */ - if (!VMSPACE_IS_KERNEL(vm)) - (void) pmap_extract(vm_map_pmap(&vm->vm_map), - vaddr, (void *)&curaddr); - else - curaddr = vtophys(vaddr); - - /* - * If we're beyond the bounce threshold, notify - * the caller. - */ - if (map->_dm_bounce_thresh != 0 && - curaddr >= map->_dm_bounce_thresh) - return (EINVAL); - - /* - * Compute the segment size, and adjust counts. - */ - sgsize = PAGE_SIZE - ((u_long)vaddr & PGOFSET); - if (buflen < sgsize) - sgsize = buflen; - - /* - * Make sure we don't cross any boundaries. - */ - if (map->_dm_boundary > 0) { - baddr = (curaddr + map->_dm_boundary) & bmask; - if (sgsize > (baddr - curaddr)) - sgsize = (baddr - curaddr); - } - - /* - * Insert chunk into a segment, coalescing with - * the previous segment if possible. - */ - if (first) { - map->dm_segs[seg].ds_addr = curaddr; - map->dm_segs[seg].ds_len = sgsize; - first = 0; - } else { - if (curaddr == lastaddr && - (map->dm_segs[seg].ds_len + sgsize) <= - map->dm_maxsegsz && - (map->_dm_boundary == 0 || - (map->dm_segs[seg].ds_addr & bmask) == - (curaddr & bmask))) - map->dm_segs[seg].ds_len += sgsize; - else { - if (++seg >= map->_dm_segcnt) - break; - map->dm_segs[seg].ds_addr = curaddr; - map->dm_segs[seg].ds_len = sgsize; - } - } - - lastaddr = curaddr + sgsize; - vaddr += sgsize; - buflen -= sgsize; - } - - *segp = seg; - *lastaddrp = lastaddr; - - /* - * Did we fit? - */ - if (buflen != 0) - return (EFBIG); /* XXX better return value here? */ - - return (0); -} - -/* - * Common function for loading a DMA map with a linear buffer. May - * be called by bus-specific DMA map load functions. - */ -int -_bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, - bus_size_t buflen, struct proc *p, int flags) -{ - paddr_t lastaddr; - int seg, error; - struct vmspace *vm; - - /* - * Make sure that on error condition we return "no valid mappings". - */ - map->dm_mapsize = 0; - map->dm_nsegs = 0; - KASSERT(map->dm_maxsegsz <= map->_dm_maxmaxsegsz); - - if (buflen > map->_dm_size) - return (EINVAL); - - if (p != NULL) { - vm = p->p_vmspace; - } else { - vm = vmspace_kernel(); - } - - seg = 0; - error = _bus_dmamap_load_buffer(t, map, buf, buflen, vm, flags, - &lastaddr, &seg, 1); - if (error == 0) { - map->dm_mapsize = buflen; - map->dm_nsegs = seg + 1; - } - return (error); -} - -/* - * Like _bus_dmamap_load(), but for mbufs. - */ -int -_bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0, - int flags) -{ - paddr_t lastaddr; - int seg, error, first; - struct mbuf *m; - - /* - * Make sure that on error condition we return "no valid mappings." - */ - map->dm_mapsize = 0; - map->dm_nsegs = 0; - KASSERT(map->dm_maxsegsz <= map->_dm_maxmaxsegsz); - -#ifdef DIAGNOSTIC - if ((m0->m_flags & M_PKTHDR) == 0) - panic("_bus_dmamap_load_mbuf: no packet header"); -#endif - - if (m0->m_pkthdr.len > map->_dm_size) - return (EINVAL); - - first = 1; - seg = 0; - error = 0; - for (m = m0; m != NULL && error == 0; m = m->m_next) { - if (m->m_len == 0) - continue; - error = _bus_dmamap_load_buffer(t, map, m->m_data, m->m_len, - vmspace_kernel(), flags, &lastaddr, &seg, first); - first = 0; - } - if (error == 0) { - map->dm_mapsize = m0->m_pkthdr.len; - map->dm_nsegs = seg + 1; - } - return (error); -} - -/* - * Like _bus_dmamap_load(), but for uios. - */ -int -_bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, - int flags) -{ - paddr_t lastaddr; - int seg, i, error, first; - bus_size_t minlen, resid; - struct iovec *iov; - caddr_t addr; - - /* - * Make sure that on error condition we return "no valid mappings." - */ - map->dm_mapsize = 0; - map->dm_nsegs = 0; - KASSERT(map->dm_maxsegsz <= map->_dm_maxmaxsegsz); - - resid = uio->uio_resid; - iov = uio->uio_iov; - - first = 1; - seg = 0; - error = 0; - for (i = 0; i < uio->uio_iovcnt && resid != 0 && error == 0; i++) { - /* - * Now at the first iovec to load. Load each iovec - * until we have exhausted the residual count. - */ - minlen = resid < iov[i].iov_len ? resid : iov[i].iov_len; - addr = (caddr_t)iov[i].iov_base; - - error = _bus_dmamap_load_buffer(t, map, addr, minlen, - uio->uio_vmspace, flags, &lastaddr, &seg, first); - first = 0; - - resid -= minlen; - } - if (error == 0) { - map->dm_mapsize = uio->uio_resid; - map->dm_nsegs = seg + 1; - } - return (error); -} - -/* - * Like _bus_dmamap_load(), but for raw memory. - */ -int -_bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, - int nsegs, bus_size_t size, int flags) -{ - - panic("_bus_dmamap_load_raw: not implemented"); -} - -/* - * Common function for unloading a DMA map. May be called by - * chipset-specific DMA map unload functions. - */ -void -_bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) -{ - - /* - * No resources to free; just mark the mappings as - * invalid. - */ - map->dm_maxsegsz = map->_dm_maxmaxsegsz; - map->dm_mapsize = 0; - map->dm_nsegs = 0; -} - -/* - * Common function for DMA map synchronization. May be called - * by chipset-specific DMA map synchronization functions. - */ -void -_bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset, - bus_size_t len, int ops) -{ - bus_addr_t addr, startline, endline, cachemask; - bus_size_t cachestride; - int i, minlen; - - /* - * Mixing PRE and POST operations is not allowed. - */ - if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 && - (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0) - panic("_bus_dmamap_sync: mix PRE and POST"); - -#if 0 - /* We only care about PREREAD and PREWRITE */ - if ((ops & (BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE)) == 0) - return; -#endif - cachestride = curcpu()->ci_ci.dcache_line_size; -#ifdef DIAGNOSTIC - if (cachestride<4) - printf("_bus_dmamap_sync: WARNING line size %x\n", cachestride); -#endif - if (cachestride < 4) cachestride = 4; - cachemask = ~(cachestride - 1); - - for (i = 0; i < map->dm_nsegs && len != 0; i++) { - /* Find the beginning segment. */ - if (offset >= map->dm_segs[i].ds_len) { - offset -= map->dm_segs[i].ds_len; - continue; - } - - /* - * Now at the first segment to sync; nail - * each segment until we have exhausted the - * length. - */ - minlen = len < map->dm_segs[i].ds_len - offset ? len : - map->dm_segs[i].ds_len - offset; - - addr = map->dm_segs[i].ds_addr; - -#if 0 - printf("bus_dmamap_sync: %s segment %d (%p + %x) \n", - (ops & BUS_DMASYNC_PREREAD) ? "invalidate": "flush", - i, addr + offset, minlen); -#endif - /* XXX does not deal with address wrap */ - - /* Cache line first byte belongs to */ - startline = (addr + offset) & cachemask; - /* Cache line last byte belongs to */ - endline = ( addr + offset + minlen - 1) & cachemask; - - if (ops & BUS_DMASYNC_PREREAD) { - /* - * Flush & Invalidate cache, so we'll re-read whatever's - * in memory now. - */ - for (addr = startline; addr <= endline; - addr += cachestride) - __asm volatile("dcbf 0,%0"::"r"(addr)); - } else if (ops & BUS_DMASYNC_PREWRITE) { - /* - * Flush cache so memory contains correct data. - */ - for (addr = startline; addr <= endline; - addr += cachestride) - __asm volatile("dcbst 0,%0"::"r"(addr)); - } else if (ops & BUS_DMASYNC_POSTREAD){ - /* - * Invalidate cache w/o flush, so we'll read whatever's - * in memory. - */ - for (addr = startline; addr <= endline; - addr += cachestride) - __asm volatile("dcbi 0,%0"::"r"(addr)); - } - - offset = 0; - len -= minlen; - } - __asm volatile("eieio; sync; isync"); -} - -/* - * Common function for DMA-safe memory allocation. May be called - * by bus-specific DMA memory allocation functions. - */ -int -_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, - bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, - int *rsegs, int flags) -{ - paddr_t avail_start, avail_end; - paddr_t curaddr, lastaddr, high; - struct vm_page *m; - struct pglist mlist; - int curseg, error; - - avail_start = vm_physmem[0].avail_start << PGSHIFT; - avail_end = vm_physmem[vm_nphysseg - 1].avail_end << PGSHIFT; - - /* Always round the size. */ - size = round_page(size); - - high = avail_end - PAGE_SIZE; - - /* - * Allocate pages from the VM system. - */ - error = uvm_pglistalloc(size, avail_start, high, alignment, boundary, - &mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0); - if (error) - return (error); - - /* - * Compute the location, size, and number of segments actually - * returned by the VM code. - */ - m = mlist.tqh_first; - curseg = 0; - lastaddr = segs[curseg].ds_addr = VM_PAGE_TO_PHYS(m); - segs[curseg].ds_len = PAGE_SIZE; - m = m->pageq.tqe_next; - - for (; m != NULL; m = m->pageq.tqe_next) { - curaddr = VM_PAGE_TO_PHYS(m); -#ifdef DIAGNOSTIC - if (curaddr < avail_start || curaddr >= high) { - printf("vm_page_alloc_memory returned non-sensical" - " address 0x%lx\n", curaddr); - panic("_bus_dmamem_alloc"); - } -#endif - if (curaddr == (lastaddr + PAGE_SIZE)) - segs[curseg].ds_len += PAGE_SIZE; - else { - curseg++; - segs[curseg].ds_addr = curaddr; - segs[curseg].ds_len = PAGE_SIZE; - } - lastaddr = curaddr; - } - - *rsegs = curseg + 1; - - return (0); -} - -/* - * Common function for freeing DMA-safe memory. May be called by - * bus-specific DMA memory free functions. - */ -void -_bus_dmamem_free(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs) -{ - struct vm_page *m; - bus_addr_t addr; - struct pglist mlist; - int curseg; - - /* - * Build a list of pages to free back to the VM system. - */ - TAILQ_INIT(&mlist); - for (curseg = 0; curseg < nsegs; curseg++) { - for (addr = segs[curseg].ds_addr; - addr < (segs[curseg].ds_addr + segs[curseg].ds_len); - addr += PAGE_SIZE) { - m = PHYS_TO_VM_PAGE(addr); - TAILQ_INSERT_TAIL(&mlist, m, pageq); - } - } - - uvm_pglistfree(&mlist); -} - -/* - * Common function for mapping DMA-safe memory. May be called by - * bus-specific DMA memory map functions. - */ -int -_bus_dmamem_map(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs, - size_t size, caddr_t *kvap, int flags) -{ - vaddr_t va; - bus_addr_t addr; - int curseg; - const uvm_flag_t kmflags = - (flags & BUS_DMA_NOWAIT) != 0 ? UVM_KMF_NOWAIT : 0; - - size = round_page(size); - - va = uvm_km_alloc(kernel_map, size, 0, UVM_KMF_VAONLY | kmflags); - - if (va == 0) - return (ENOMEM); - - *kvap = (caddr_t)va; - - for (curseg = 0; curseg < nsegs; curseg++) { - for (addr = segs[curseg].ds_addr; - addr < (segs[curseg].ds_addr + segs[curseg].ds_len); - addr += PAGE_SIZE, va += PAGE_SIZE, size -= PAGE_SIZE) { - if (size == 0) - panic("_bus_dmamem_map: size botch"); - pmap_enter(pmap_kernel(), va, addr, - VM_PROT_READ | VM_PROT_WRITE, - VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED | - PME_NOCACHE); - } - } - - return (0); -} - -/* - * Common function for unmapping DMA-safe memory. May be called by - * bus-specific DMA memory unmapping functions. - */ -void -_bus_dmamem_unmap(bus_dma_tag_t t, caddr_t kva, size_t size) -{ - -#ifdef DIAGNOSTIC - if ((u_long)kva & PGOFSET) - panic("_bus_dmamem_unmap"); -#endif - - size = round_page(size); - - pmap_remove(pmap_kernel(), (vaddr_t)kva, (vaddr_t)kva + size); - pmap_update(pmap_kernel()); - uvm_km_free(kernel_map, (vaddr_t)kva, size, UVM_KMF_VAONLY); -} - -/* - * Common functin for mmap(2)'ing DMA-safe memory. May be called by - * bus-specific DMA mmap(2)'ing functions. - */ -paddr_t -_bus_dmamem_mmap(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs, off_t off, - int prot, int flags) -{ - int i; - - for (i = 0; i < nsegs; i++) { -#ifdef DIAGNOSTIC - if (off & PGOFSET) - panic("_bus_dmamem_mmap: offset unaligned"); - if (segs[i].ds_addr & PGOFSET) - panic("_bus_dmamem_mmap: segment unaligned"); - if (segs[i].ds_len & PGOFSET) - panic("_bus_dmamem_mmap: segment size not multiple" - " of page size"); -#endif - if (off >= segs[i].ds_len) { - off -= segs[i].ds_len; - continue; - } - - return (segs[i].ds_addr + off); - } - - /* Page not found. */ - return (-1); -} - - -/* - * "generic" DMA struct, nothing special. - */ -struct ibm4xx_bus_dma_tag ibm4xx_default_bus_dma_tag = { - 0, /* _bounce_thresh */ - _bus_dmamap_create, - _bus_dmamap_destroy, - _bus_dmamap_load, - _bus_dmamap_load_mbuf, - _bus_dmamap_load_uio, - _bus_dmamap_load_raw, - _bus_dmamap_unload, - _bus_dmamap_sync, - _bus_dmamem_alloc, - _bus_dmamem_free, - _bus_dmamem_map, - _bus_dmamem_unmap, - _bus_dmamem_mmap, -};