[src/trunk]: src/sys/arch/vax/uba Added support for Qbus DMA.

[ragge <ragge%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e45ca848f8d7
branches:  trunk
changeset: 473523:e45ca848f8d7
user:      ragge <ragge%NetBSD.org@localhost>
date:      Sun Jun 06 19:00:53 1999 +0000

description:
Added support for Qbus DMA.

diffstat:

 sys/arch/vax/uba/uba_dma.c     |  281 +++++++++++++++++++++++++++++++++++++++++
 sys/arch/vax/uba/uba_mainbus.c |   54 ++++---
 2 files changed, 310 insertions(+), 25 deletions(-)

diffs (truncated from 388 to 300 lines):

diff -r 9f9881c5a48f -r e45ca848f8d7 sys/arch/vax/uba/uba_dma.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/vax/uba/uba_dma.c        Sun Jun 06 19:00:53 1999 +0000
@@ -0,0 +1,281 @@
+/* $NetBSD: uba_dma.c,v 1.1 1999/06/06 19:00:53 ragge 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, SPEUBAL, 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 <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <vm/vm.h>
+
+#define _VAX_BUS_DMA_PRIVATE
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/sgmap.h>
+
+#include <dev/qbus/ubavar.h>
+
+#include <arch/vax/uba/uba_common.h>
+
+int    uba_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int,
+           bus_size_t, bus_size_t, int, bus_dmamap_t *));
+
+void   uba_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
+
+int    uba_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *,
+           bus_size_t, struct proc *, int));
+
+int    uba_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
+           struct mbuf *, int));
+
+int    uba_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
+           struct uio *, int));
+
+int    uba_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
+           bus_dma_segment_t *, int, bus_size_t, int));
+
+void   uba_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
+
+void   uba_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
+           bus_size_t, int));
+
+void
+uba_dma_init(sc)
+       struct uba_vsoftc *sc;
+{
+       bus_dma_tag_t t;
+       struct pte *pte;
+
+       /*
+        * Initialize the DMA tag used for sgmap-mapped DMA.
+        */
+       t = &sc->uv_dmat;
+       t->_cookie = sc;
+       t->_wbase = 0;
+       t->_wsize = sc->uv_size;
+       t->_boundary = 0;
+       t->_sgmap = &sc->uv_sgmap;
+       t->_dmamap_create = uba_bus_dmamap_create_sgmap;
+       t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap;
+       t->_dmamap_load = uba_bus_dmamap_load_sgmap;
+       t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap;
+       t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap;
+       t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap;
+       t->_dmamap_unload = uba_bus_dmamap_unload_sgmap;
+       t->_dmamap_sync = uba_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;
+
+       /*
+        * Map in Unibus map registers.
+        */
+       pte = (struct pte *)vax_map_physmem(sc->uv_addr, sc->uv_size/VAX_NBPG);
+       if (pte == 0)
+               panic("uba_dma_init");
+       /*
+        * Initialize the SGMAP.
+        */
+       vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0);
+
+}
+
+/*
+ * Create a UBA SGMAP-mapped DMA map.
+ */
+int
+uba_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;
+{
+       bus_dmamap_t map;
+       int error;
+
+       error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
+           boundary, flags, dmamp);
+       if (error)
+               return (error);
+
+       map = *dmamp;
+
+       if (flags & BUS_DMA_ALLOCNOW) {
+               error = vax_sgmap_alloc(map, round_page(size),
+                   t->_sgmap, flags);
+               if (error)
+                       uba_bus_dmamap_destroy_sgmap(t, map);
+       }
+
+       return (error);
+}
+
+/*
+ * Destroy a UBA SGMAP-mapped DMA map.
+ */
+void
+uba_bus_dmamap_destroy_sgmap(t, map)
+       bus_dma_tag_t t;
+       bus_dmamap_t map;
+{
+
+       if (map->_dm_flags & DMAMAP_HAS_SGMAP)
+               vax_sgmap_free(map, t->_sgmap);
+
+       _bus_dmamap_destroy(t, map);
+}
+
+/*
+ * Load a UBA SGMAP-mapped DMA map with a linear buffer.
+ */
+int
+uba_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 = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap);
+       /*
+        * XXX - Set up BDPs.
+        */
+
+       return (error);
+}
+
+/*
+ * Load a UBA SGMAP-mapped DMA map with an mbuf chain.
+ */
+int
+uba_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 = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap);
+
+       return (error);
+}
+
+/*
+ * Load a UBA SGMAP-mapped DMA map with a uio.
+ */
+int
+uba_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 = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap);
+
+       return (error);
+}
+
+/*
+ * Load a UBA SGMAP-mapped DMA map with raw memory.
+ */
+int
+uba_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 = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags,
+           t->_sgmap);
+
+       return (error);
+}
+
+/*
+ * Unload a UBA DMA map.
+ */
+void
+uba_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.
+        */
+       vax_sgmap_unload(t, map, t->_sgmap);
+
+       /*
+        * Do the generic bits of the unload.
+        */
+       _bus_dmamap_unload(t, map);
+}
+
+/*
+ * Sync the bus map. This is only needed if BDP's are used.
+ */
+void
+uba_bus_dmamap_sync(tag, dmam, offset, len, ops)
+       bus_dma_tag_t tag;
+       bus_dmamap_t dmam;
+       bus_addr_t offset;
+       bus_size_t len;
+       int ops;
+{
+       /* Only BDP handling, but not yet. */
+}
diff -r 9f9881c5a48f -r e45ca848f8d7 sys/arch/vax/uba/uba_mainbus.c
--- a/sys/arch/vax/uba/uba_mainbus.c    Sun Jun 06 18:58:50 1999 +0000
+++ b/sys/arch/vax/uba/uba_mainbus.c    Sun Jun 06 19:00:53 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uba_mainbus.c,v 1.1 1999/05/24 20:10:31 ragge Exp $       */
+/*     $NetBSD: uba_mainbus.c,v 1.2 1999/06/06 19:00:53 ragge Exp $       */
 /*
  * Copyright (c) 1996 Jonathan Stone.
  * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
@@ -41,27 +41,34 @@
 #include <sys/device.h>
 #include <sys/systm.h>
 
+#define        _VAX_BUS_DMA_PRIVATE
 #include <machine/bus.h>