/* $OpenBSD: tsp_dma.c,v 1.6 2008/10/17 18:30:20 okan Exp $ */ /* $NetBSD: tsp_dma.c,v 1.1 1999/06/29 06:46:47 ross Exp $ */ /*- * Copyright (c) 1999 by Ross Harvey. All rights reserved. * * 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 Ross Harvey. * 4. The name of Ross Harvey may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE * ARE DISCLAIMED. IN NO EVENT SHALL ROSS HARVEY 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. * */ /*- * 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. * * 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 #define tsp_dma() { Generate ctags(1) key. } #define EDIFF(a, b) (((a) | WSBA_ENA | WSBA_SG) != ((b) | WSBA_ENA | WSBA_SG)) bus_dma_tag_t tsp_dma_get_tag(bus_dma_tag_t, alpha_bus_t); int tsp_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int tsp_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); void tsp_tlb_invalidate(struct tsp_config *); /* * XXX Need to figure out what this is, if any. Initialize it to * XXX something that should be safe. */ #define TSP_SGMAP_PFTHRESH 256 void tsp_dma_init(pcp) struct tsp_config *pcp; { int i; bus_dma_tag_t t; struct ts_pchip *pccsr = pcp->pc_csr; bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase; static struct map_expected { u_int32_t base, mask, enables; } premap[4] = { { 0x800000, 0x700000, WSBA_ENA | WSBA_SG }, { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA }, { 0, 0 }, { 0, 0 } }; alpha_mb(); for(i = 0; i < 4; ++i) { if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) || EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask)) printf("tsp%d: window %d: %lx/base %lx/mask %lx" " reinitialized\n", pcp->pc_pslot, i, pccsr->tsp_wsba[i].tsg_r, pccsr->tsp_wsm[i].tsg_r, pccsr->tsp_tba[i].tsg_r); pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables; pccsr->tsp_wsm[i].tsg_r = premap[i].mask; } alpha_mb(); /* * Initialize the DMA tag used for direct-mapped DMA. */ t = &pcp->pc_dmat_direct; t->_cookie = pcp; t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r); t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r); t->_next_window = &pcp->pc_dmat_sgmap; t->_boundary = 0; t->_sgmap = NULL; t->_get_tag = tsp_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 DMA. */ t = &pcp->pc_dmat_sgmap; t->_cookie = pcp; t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r); t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r); t->_next_window = NULL; t->_boundary = 0; t->_sgmap = &pcp->pc_sgmap; t->_pfthresh = TSP_SGMAP_PFTHRESH; t->_get_tag = tsp_dma_get_tag; t->_dmamap_create = alpha_sgmap_dmamap_create; t->_dmamap_destroy = alpha_sgmap_dmamap_destroy; t->_dmamap_load = tsp_bus_dmamap_load_sgmap; t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap; t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap; t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap; t->_dmamap_unload = tsp_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 SGMAP. Align page table to 32k in case * window is somewhat larger than expected. */ alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap", sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024)); /* * Enable window 0 and enable SG PTE mapping. */ alpha_mb(); pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA; alpha_mb(); /* * Check windows for sanity, especially if we later decide to * use the firmware's initialization in some cases. */ if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) || (dwbase <= sgwbase && sgwbase < dwbase + dwlen)) panic("tsp_dma_init: overlap"); tbase = pcp->pc_sgmap.aps_ptpa; if (tbase & ~0x7fffffc00UL) panic("tsp_dma_init: bad page table address"); alpha_mb(); pccsr->tsp_tba[0].tsg_r = tbase; alpha_mb(); tsp_tlb_invalidate(pcp); alpha_mb(); /* XXX XXX BEGIN XXX XXX */ { /* XXX */ extern paddr_t alpha_XXX_dmamap_or; /* XXX */ alpha_XXX_dmamap_or = dwbase; /* 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 tsp_dma_get_tag(t, bustype) bus_dma_tag_t t; alpha_bus_t bustype; { struct tsp_config *pcp = t->_cookie; switch (bustype) { case ALPHA_BUS_PCI: case ALPHA_BUS_EISA: /* * The direct mapped window will work for most systems, * most of the time. When it doesn't, we chain to the sgmap * window automatically. */ return (&pcp->pc_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 (&pcp->pc_dmat_sgmap); default: panic("tsp_dma_get_tag: shouldn't be here, really..."); } } /* * Load a TSP SGMAP-mapped DMA map with a linear buffer. */ int tsp_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; error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags, t->_sgmap); if (error == 0) tsp_tlb_invalidate(t->_cookie); return (error); } /* * Load a TSP SGMAP-mapped DMA map with an mbuf chain. */ int tsp_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; error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap); if (error == 0) tsp_tlb_invalidate(t->_cookie); return (error); } /* * Load a TSP SGMAP-mapped DMA map with a uio. */ int tsp_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; error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap); if (error == 0) tsp_tlb_invalidate(t->_cookie); return (error); } /* * Load a TSP SGMAP-mapped DMA map with raw memory. */ int tsp_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; error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); if (error == 0) tsp_tlb_invalidate(t->_cookie); return (error); } /* * Unload a TSP DMA map. */ void tsp_bus_dmamap_unload_sgmap(t, map) bus_dma_tag_t t; bus_dmamap_t map; { /* * Invalidate any SGMAP page table entries used by this * mapping. */ pci_sgmap_pte64_unload(t, map, t->_sgmap); tsp_tlb_invalidate(t->_cookie); /* * Do the generic bits of the unload. */ _bus_dmamap_unload(t, map); } /* * Flush the TSP scatter/gather TLB. */ void tsp_tlb_invalidate(pcp) struct tsp_config *pcp; { alpha_mb(); pcp->pc_csr->tsp_tlbia.tsg_r = 0; alpha_mb(); }