/* $NetBSD: apecs_dma.c,v 1.2 1997/06/06 23:59:23 thorpej Exp $ */ /*- * Copyright (c) 1997 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 /* Config options headers */ #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: apecs_dma.c,v 1.2 1997/06/06 23:59:23 thorpej Exp $"); #include #include #include #include #include #include #define _ALPHA_BUS_DMA_PRIVATE #include #include #include #include #include bus_dma_tag_t apecs_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t)); int apecs_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *)); void apecs_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); int apecs_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int)); int apecs_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int)); int apecs_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int)); int apecs_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int)); int apecs_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t, struct uio *, int)); int apecs_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, struct uio *, int)); int apecs_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int)); int apecs_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int)); void apecs_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); /* * The 1G direct-mapped DMA window begins at this PCI address. */ #define APECS_DIRECT_MAPPED_BASE 0x40000000 /* * The 8M SGMAP-mapped DMA window begins at this PCI address. */ #define APECS_SGMAP_MAPPED_BASE (8*1024*1024) /* * Macro to flush APECS scatter/gather TLB. */ #define APECS_TLB_INVALIDATE() \ do { \ alpha_mb(); \ REGVAL(EPIC_TBIA) = 0; \ alpha_mb(); \ } while (0) void apecs_dma_init(acp) struct apecs_config *acp; { bus_addr_t tbase; bus_dma_tag_t t; /* * Initialize the DMA tag used for direct-mapped DMA. */ t = &acp->ac_dmat_direct; t->_cookie = acp; t->_get_tag = apecs_dma_get_tag; t->_dmamap_create = _bus_dmamap_create; t->_dmamap_destroy = _bus_dmamap_destroy; t->_dmamap_load = apecs_bus_dmamap_load_direct; t->_dmamap_load_mbuf = apecs_bus_dmamap_load_mbuf_direct; t->_dmamap_load_uio = apecs_bus_dmamap_load_uio_direct; t->_dmamap_load_raw = apecs_bus_dmamap_load_raw_direct; t->_dmamap_unload = _bus_dmamap_unload; t->_dmamap_sync = NULL; /* Nothing to do. */ t->_dmamem_alloc = _bus_dmamem_alloc; t->_dmamem_free = _bus_dmamem_free; t->_dmamem_map = _bus_dmamem_map; t->_dmamem_unmap = _bus_dmamem_unmap; t->_dmamem_mmap = _bus_dmamem_mmap; /* * Initialize the DMA tag used for sgmap-mapped DMA. */ t = &acp->ac_dmat_sgmap; t->_cookie = acp; t->_get_tag = apecs_dma_get_tag; t->_dmamap_create = apecs_bus_dmamap_create_sgmap; t->_dmamap_destroy = apecs_bus_dmamap_destroy_sgmap; t->_dmamap_load = apecs_bus_dmamap_load_sgmap; t->_dmamap_load_mbuf = apecs_bus_dmamap_load_mbuf_sgmap; t->_dmamap_load_uio = apecs_bus_dmamap_load_uio_sgmap; t->_dmamap_load_raw = apecs_bus_dmamap_load_raw_sgmap; t->_dmamap_unload = apecs_bus_dmamap_unload_sgmap; t->_dmamap_sync = NULL; /* Nothing to do. */ t->_dmamem_alloc = _bus_dmamem_alloc; t->_dmamem_free = _bus_dmamem_free; t->_dmamem_map = _bus_dmamem_map; t->_dmamem_unmap = _bus_dmamem_unmap; t->_dmamem_mmap = _bus_dmamem_mmap; /* * The firmware has set up window 2 as a 1G direct-mapped DMA * window beginning at 1G. We leave it alone. Disable * window 1. */ REGVAL(EPIC_PCI_BASE_1) = 0; alpha_mb(); /* * Initialize the SGMAP if safe to do so. */ if (acp->ac_mallocsafe) { alpha_sgmap_init(t, &acp->ac_sgmap, "apecs_sgmap", APECS_SGMAP_MAPPED_BASE, 0, (8*1024*1024), sizeof(u_int64_t), NULL); /* * Set up window 1 as an 8MB SGMAP-mapped window * starting at 8MB. */ tbase = acp->ac_sgmap.aps_ptpa >> EPIC_TBASE_SHIFT; if ((tbase & EPIC_TBASE_T_BASE) != tbase) panic("apecs_dma_init: bad page table address"); REGVAL(EPIC_TBASE_1) = tbase; REGVAL(EPIC_PCI_MASK_1) = EPIC_PCI_MASK_8M; alpha_mb(); REGVAL(EPIC_PCI_BASE_1) = APECS_SGMAP_MAPPED_BASE | EPIC_PCI_BASE_SGEN | EPIC_PCI_BASE_WENB; alpha_mb(); APECS_TLB_INVALIDATE(); } /* XXX XXX BEGIN XXX XXX */ { /* XXX */ extern vm_offset_t alpha_XXX_dmamap_or; /* XXX */ alpha_XXX_dmamap_or = APECS_DIRECT_MAPPED_BASE; /* XXX */ } /* XXX */ /* XXX XXX END XXX XXX */ } /* * Return the bus dma tag to be used for the specified bus type. * INTERNAL USE ONLY! */ bus_dma_tag_t apecs_dma_get_tag(t, bustype) bus_dma_tag_t t; alpha_bus_t bustype; { struct apecs_config *acp = t->_cookie; switch (bustype) { case ALPHA_BUS_PCI: case ALPHA_BUS_EISA: /* * Systems with an APECS can only support 1G * of memory, so we use the direct-mapped window * on busses that have 32-bit DMA. */ return (&acp->ac_dmat_direct); case ALPHA_BUS_ISA: /* * ISA doesn't have enough address bits to use * the direct-mapped DMA window, so we must use * SGMAPs. */ return (&acp->ac_dmat_sgmap); default: panic("apecs_dma_get_tag: shouldn't be here, really..."); } } /* * Create an APECS SGMAP-mapped DMA map. */ int apecs_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, flags, dmamp) 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 apecs_config *acp = t->_cookie; struct alpha_sgmap_cookie *a; bus_dmamap_t map; int error; error = _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp); if (error) return (error); map = *dmamp; a = malloc(sizeof(struct alpha_sgmap_cookie), M_DEVBUF, (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); if (a == NULL) { _bus_dmamap_destroy(t, map); return (ENOMEM); } bzero(a, sizeof(struct alpha_sgmap_cookie)); map->_dm_sgcookie = a; if (flags & BUS_DMA_ALLOCNOW) { error = alpha_sgmap_alloc(map, round_page(size), &acp->ac_sgmap, flags); if (error) apecs_bus_dmamap_destroy_sgmap(t, map); } return (error); } /* * Destroy an APECS SGMAP-mapped DMA map. */ void apecs_bus_dmamap_destroy_sgmap(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct apecs_config *acp = t->_cookie; struct alpha_sgmap_cookie *a = map->_dm_sgcookie; if (a->apdc_flags & APDC_HAS_SGMAP) alpha_sgmap_free(&acp->ac_sgmap, a); free(a, M_DEVBUF); _bus_dmamap_destroy(t, map); } /* * Load an APECS direct-mapped DMA map with a linear buffer. */ int apecs_bus_dmamap_load_direct(t, map, buf, buflen, p, flags) bus_dma_tag_t t; bus_dmamap_t map; void *buf; bus_size_t buflen; struct proc *p; int flags; { return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p, flags, APECS_DIRECT_MAPPED_BASE)); } /* * Load an APECS SGMAP-mapped DMA map with a linear buffer. */ int apecs_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) bus_dma_tag_t t; bus_dmamap_t map; void *buf; bus_size_t buflen; struct proc *p; int flags; { struct apecs_config *acp = t->_cookie; int error; error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, &acp->ac_sgmap); if (error == 0) APECS_TLB_INVALIDATE(); return (error); } /* * Load an APECS direct-mapped DMA map with an mbuf chain. */ int apecs_bus_dmamap_load_mbuf_direct(t, map, m, flags) bus_dma_tag_t t; bus_dmamap_t map; struct mbuf *m; int flags; { return (_bus_dmamap_load_mbuf_direct_common(t, map, m, flags, APECS_DIRECT_MAPPED_BASE)); } /* * Load an APECS SGMAP-mapped DMA map with an mbuf chain. */ int apecs_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) bus_dma_tag_t t; bus_dmamap_t map; struct mbuf *m; int flags; { struct apecs_config *acp = t->_cookie; int error; error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, &acp->ac_sgmap); if (error == 0) APECS_TLB_INVALIDATE(); return (error); } /* * Load an APECS direct-mapped DMA map with a uio. */ int apecs_bus_dmamap_load_uio_direct(t, map, uio, flags) bus_dma_tag_t t; bus_dmamap_t map; struct uio *uio; int flags; { return (_bus_dmamap_load_uio_direct_common(t, map, uio, flags, APECS_DIRECT_MAPPED_BASE)); } /* * Load an APECS SGMAP-mapped DMA map with a uio. */ int apecs_bus_dmamap_load_uio_sgmap(t, map, uio, flags) bus_dma_tag_t t; bus_dmamap_t map; struct uio *uio; int flags; { struct apecs_config *acp = t->_cookie; int error; error = pci_sgmap_pte64_load_uio(t, map, uio, flags, &acp->ac_sgmap); if (error == 0) APECS_TLB_INVALIDATE(); return (error); } /* * Load an APECS direct-mapped DMA map with raw memory. */ int apecs_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags) bus_dma_tag_t t; bus_dmamap_t map; bus_dma_segment_t *segs; int nsegs; bus_size_t size; int flags; { return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs, size, flags, APECS_DIRECT_MAPPED_BASE)); } /* * Load an APECS SGMAP-mapped DMA map with raw memory. */ int apecs_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) bus_dma_tag_t t; bus_dmamap_t map; bus_dma_segment_t *segs; int nsegs; bus_size_t size; int flags; { struct apecs_config *acp = t->_cookie; int error; error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, &acp->ac_sgmap); if (error == 0) APECS_TLB_INVALIDATE(); return (error); } /* * Unload an APECS DMA map. */ void apecs_bus_dmamap_unload_sgmap(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct apecs_config *acp = t->_cookie; /* * Invalidate any SGMAP page table entries used by this * mapping. */ pci_sgmap_pte64_unload(t, map, &acp->ac_sgmap); APECS_TLB_INVALIDATE(); /* * Do the generic bits of the unload. */ _bus_dmamap_unload(t, map); }