/* $OpenBSD: mcpcia_dma.c,v 1.4 2012/12/05 23:20:10 deraadt Exp $ */ /* $NetBSD: mcpcia_dma.c,v 1.15 2001/07/19 18:55:40 thorpej Exp $ */ /*- * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe and Matthew Jacob 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. * * 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. */ #define _ALPHA_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #include #include #include #include bus_dma_tag_t mcpcia_dma_get_tag (bus_dma_tag_t, alpha_bus_t); int mcpcia_bus_dmamap_load_sgmap (bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int mcpcia_bus_dmamap_load_mbuf_sgmap (bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int mcpcia_bus_dmamap_load_uio_sgmap (bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int mcpcia_bus_dmamap_load_raw_sgmap (bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void mcpcia_bus_dmamap_unload_sgmap (bus_dma_tag_t, bus_dmamap_t); /* * Direct-mapped window: 2G at 2G */ #define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL) #define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL) /* * SGMAP window for PCI: 1G at 1G */ #define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL) #define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL) /* * SGMAP window for ISA: 8M at 8M */ #define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024) #define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024) #define MCPCIA_SGTLB_INVALIDATE(ccp) \ do { \ alpha_mb(); \ REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \ alpha_mb(); \ } while (0) void mcpcia_dma_init(ccp) struct mcpcia_config *ccp; { bus_dma_tag_t t; /* * Initialize the DMA tag used for direct-mapped DMA. */ t = &ccp->cc_dmat_direct; t->_cookie = ccp; t->_wbase = MCPCIA_DIRECT_MAPPED_BASE; t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE; t->_next_window = &ccp->cc_dmat_pci_sgmap; t->_boundary = 0; t->_sgmap = NULL; t->_get_tag = mcpcia_dma_get_tag; t->_dmamap_create = _bus_dmamap_create; t->_dmamap_destroy = _bus_dmamap_destroy; t->_dmamap_load = _bus_dmamap_load_direct; t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct; t->_dmamap_load_uio = _bus_dmamap_load_uio_direct; t->_dmamap_load_raw = _bus_dmamap_load_raw_direct; t->_dmamap_unload = _bus_dmamap_unload; t->_dmamap_sync = _bus_dmamap_sync; 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 PCI DMA. */ t = &ccp->cc_dmat_pci_sgmap; t->_cookie = ccp; t->_wbase = MCPCIA_PCI_SG_MAPPED_BASE; t->_wsize = MCPCIA_PCI_SG_MAPPED_SIZE; t->_next_window = NULL; t->_boundary = 0; t->_sgmap = &ccp->cc_pci_sgmap; t->_get_tag = mcpcia_dma_get_tag; t->_dmamap_create = alpha_sgmap_dmamap_create; t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; t->_dmamap_sync = _bus_dmamap_sync; 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 ISA DMA. */ t = &ccp->cc_dmat_isa_sgmap; t->_cookie = ccp; t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE; t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE; t->_next_window = NULL; t->_boundary = 0; t->_sgmap = &ccp->cc_isa_sgmap; t->_get_tag = mcpcia_dma_get_tag; t->_dmamap_create = alpha_sgmap_dmamap_create; t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap; t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap; t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap; t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap; t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap; t->_dmamap_sync = _bus_dmamap_sync; 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 SGMAPs. */ alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap, "mcpcia pci sgmap", MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE, sizeof(u_int64_t), NULL, 0); alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap, "mcpcia isa sgmap", MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE, sizeof(u_int64_t), NULL, 0); /* * Disable windows first. */ REGVAL(MCPCIA_W0_BASE(ccp)) = 0; REGVAL(MCPCIA_W1_BASE(ccp)) = 0; REGVAL(MCPCIA_W2_BASE(ccp)) = 0; REGVAL(MCPCIA_W3_BASE(ccp)) = 0; REGVAL(MCPCIA_T0_BASE(ccp)) = 0; REGVAL(MCPCIA_T1_BASE(ccp)) = 0; REGVAL(MCPCIA_T2_BASE(ccp)) = 0; REGVAL(MCPCIA_T3_BASE(ccp)) = 0; alpha_mb(); /* * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB. */ REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M; REGVAL(MCPCIA_T0_BASE(ccp)) = ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; alpha_mb(); REGVAL(MCPCIA_W0_BASE(ccp)) = MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE; alpha_mb(); MCPCIA_SGTLB_INVALIDATE(ccp); /* * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB. */ REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G; REGVAL(MCPCIA_T1_BASE(ccp)) = 0; alpha_mb(); REGVAL(MCPCIA_W1_BASE(ccp)) = MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN; alpha_mb(); /* * Set up window 2 as a 1G SGMAP-mapped window starting at 1G. */ REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G; REGVAL(MCPCIA_T2_BASE(ccp)) = ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT; alpha_mb(); REGVAL(MCPCIA_W2_BASE(ccp)) = MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE; alpha_mb(); /* XXX XXX BEGIN XXX XXX */ { /* XXX */ extern paddr_t alpha_XXX_dmamap_or; /* XXX */ alpha_XXX_dmamap_or = MCPCIA_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 mcpcia_dma_get_tag(t, bustype) bus_dma_tag_t t; alpha_bus_t bustype; { struct mcpcia_config *ccp = t->_cookie; switch (bustype) { case ALPHA_BUS_PCI: case ALPHA_BUS_EISA: /* * Start off using the direct-mapped window. We will * automatically fall backed onto the chained PCI SGMAP * window if necessary. */ return (&ccp->cc_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 (&ccp->cc_dmat_isa_sgmap); default: panic("mcpcia_dma_get_tag: shouldn't be here, really..."); } } /* * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer. */ int mcpcia_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; { int error; struct mcpcia_config *ccp = t->_cookie; error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, t->_sgmap); if (error == 0) MCPCIA_SGTLB_INVALIDATE(ccp); return (error); } /* * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain. */ int mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) bus_dma_tag_t t; bus_dmamap_t map; struct mbuf *m; int flags; { int error; struct mcpcia_config *ccp = t->_cookie; error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); if (error == 0) MCPCIA_SGTLB_INVALIDATE(ccp); return (error); } /* * Load a MCPCIA SGMAP-mapped DMA map with a uio. */ int mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags) bus_dma_tag_t t; bus_dmamap_t map; struct uio *uio; int flags; { int error; struct mcpcia_config *ccp = t->_cookie; error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); if (error == 0) MCPCIA_SGTLB_INVALIDATE(ccp); return (error); } /* * Load a MCPCIA SGMAP-mapped DMA map with raw memory. */ int mcpcia_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; { int error; struct mcpcia_config *ccp = t->_cookie; error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); if (error == 0) MCPCIA_SGTLB_INVALIDATE(ccp); return (error); } /* * Unload a MCPCIA DMA map. */ void mcpcia_bus_dmamap_unload_sgmap(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct mcpcia_config *ccp = t->_cookie; /* * Invalidate any SGMAP page table entries used by this mapping. */ pci_sgmap_pte64_unload(t, map, t->_sgmap); MCPCIA_SGTLB_INVALIDATE(ccp); /* * Do the generic bits of the unload. */ _bus_dmamap_unload(t, map); }