add DEC_KN300 support from NetBSD;

This code makes it possible to run on some of the AlphaServers,
namely AlphaServer 4100 and 1200.

add mcbus(4) and mcpcia(4) to provide support for the system bus and
the MCPCIA-to-PCI bus adapter that can be found in these systems

allow the pci_swiz_bus code to handle variable extent names
to be able to handle more than one mcpcia(4)

"just commit it" deraadt@

1 files changed, 395 insertions, 0 deletions

diff --git a/sys/arch/alpha/pci/mcpcia_dma.c b/sys/arch/alpha/pci/mcpcia_dma.c
new file mode 100644
index 00000000000..50f0fbfe203
--- /dev/null
+++ b/sys/arch/alpha/pci/mcpcia_dma.c
@@ -0,0 +1,395 @@
+/* $OpenBSD: mcpcia_dma.c,v 1.1 2007/03/16 21:22:27 robert 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.
+ * 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/cdefs.h>			/* RCS ID & Copyright macro defns */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+
+#include <uvm/uvm_extern.h>
+
+#include <machine/bus.h>
+#include <machine/rpb.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <alpha/pci/mcpciareg.h>
+#include <alpha/pci/mcpciavar.h>
+#include <alpha/pci/pci_kn300.h>
+
+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)
+
+/* MCPCIA has a 256-byte out-bound DMA prefetch threshold. */
+#define	MCPCIA_SG_MAPPED_PFTHRESH	256
+
+#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->_pfthresh = MCPCIA_SG_MAPPED_PFTHRESH;
+	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->_pfthresh = MCPCIA_SG_MAPPED_PFTHRESH;
+	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);
+}