initial support for 21264 systems.

from NetBSD.

1 files changed, 442 insertions, 0 deletions

diff --git a/sys/arch/alpha/pci/tsp_dma.c b/sys/arch/alpha/pci/tsp_dma.c
new file mode 100644
index 00000000000..21cbbaf4d7f
--- /dev/null
+++ b/sys/arch/alpha/pci/tsp_dma.c
@@ -0,0 +1,442 @@
+/* $OpenBSD: tsp_dma.c,v 1.1 2000/11/16 04:50:18 ericj 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.
+ * 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.
+ */
+
+#define _ALPHA_BUS_DMA_PRIVATE
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+
+#include <vm/vm.h>
+#include <uvm/uvm_extern.h>
+
+#include <machine/autoconf.h>
+
+#include <machine/bus.h>
+#include <machine/rpb.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <alpha/pci/tsreg.h>
+#include <alpha/pci/tsvar.h>
+
+#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 __P((bus_dma_tag_t, alpha_bus_t));
+
+int	tsp_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int,
+	    bus_size_t, bus_size_t, int, bus_dmamap_t *));
+
+void	tsp_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
+
+int	tsp_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *,
+	    bus_size_t, struct proc *, int));
+
+int	tsp_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
+	    struct mbuf *, int));
+
+int	tsp_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
+	    struct uio *, int));
+
+int	tsp_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
+	    bus_dma_segment_t *, int, bus_size_t, int));
+
+void	tsp_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
+
+void	tsp_tlb_invalidate __P((struct tsp_config *));
+
+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->_get_tag = tsp_dma_get_tag;
+	t->_dmamap_create = tsp_bus_dmamap_create_sgmap;
+	t->_dmamap_destroy = tsp_bus_dmamap_destroy_sgmap;
+	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...");
+	}
+}
+
+/*
+ * Create a TSP SGMAP-mapped DMA map.
+ */
+int
+tsp_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 = alpha_sgmap_alloc(map, round_page(size),
+		    t->_sgmap, flags);
+		if (error)
+			tsp_bus_dmamap_destroy_sgmap(t, map);
+	}
+
+	return (error);
+}
+
+/*
+ * Destroy a TSP SGMAP-mapped DMA map.
+ */
+void
+tsp_bus_dmamap_destroy_sgmap(t, map)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+{
+
+	if (map->_dm_flags & DMAMAP_HAS_SGMAP)
+		alpha_sgmap_free(map, t->_sgmap);
+
+	_bus_dmamap_destroy(t, map);
+}
+
+/*
+ * 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();
+}