NetBSD/sys/dev/pci/btvmeii.c

/* $NetBSD: btvmeii.c,v 1.1 2000/02/25 18:22:39 drochner Exp $ */

/*
 * Copyright (c) 1999
 * 	Matthias Drochner.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

/*
 * Driver for the Bit3/SBS PCI-VME adapter Model 2706.
 * Uses the common Tundra Universe code.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

#include <machine/bus.h>
#include <sys/malloc.h>
#include <sys/extent.h>

#include <dev/pci/ppbreg.h>

#include <dev/vme/vmereg.h>
#include <dev/vme/vmevar.h>

#include <dev/pci/universe_pci_var.h>

static int b3_2706_match __P((struct device *, struct cfdata *, void *));
static void b3_2706_attach __P((struct device *, struct device *, void *));

/* exported via tag structs */
int b3_2706_map_vme __P((void *, vme_addr_t, vme_size_t,
		      vme_am_t, vme_datasize_t, vme_swap_t,
		      bus_space_tag_t *, bus_space_handle_t *, vme_mapresc_t*));
void b3_2706_unmap_vme __P((void *, vme_mapresc_t));

int b3_2706_vme_probe __P((void *, vme_addr_t, vme_size_t, vme_am_t,
			vme_datasize_t,
			int (*)(void *, bus_space_tag_t, bus_space_handle_t),
			void *));

int b3_2706_map_vmeint __P((void *, int, int, vme_intr_handle_t *));
void *b3_2706_establish_vmeint __P((void *, vme_intr_handle_t, int,
				 int (*)(void *), void *));
void b3_2706_disestablish_vmeint __P((void *, void *));

int b3_2706_dmamap_create __P((void *, vme_size_t,
			    vme_am_t, vme_datasize_t, vme_swap_t,
			    int, vme_size_t, vme_addr_t,
			    int, bus_dmamap_t *));
void b3_2706_dmamap_destroy __P((void *, bus_dmamap_t));

int b3_2706_dmamem_alloc __P((void *, vme_size_t,
			      vme_am_t, vme_datasize_t, vme_swap_t,
			      bus_dma_segment_t *, int, int *, int));
void b3_2706_dmamem_free __P((void *, bus_dma_segment_t *, int));

struct b3_2706_vmemaprescs {
	int wnd;
	unsigned long pcibase, maplen;
	bus_space_handle_t handle;
	u_int32_t len;
};

struct b3_2706_softc {
	struct device sc_dev;
	struct univ_pci_data univdata;
	bus_space_tag_t swapt, vmet;
	bus_space_handle_t swaph;
	bus_addr_t vmepbase;

	int windowused[8];
	struct b3_2706_vmemaprescs vmemaprescs[8];
	struct extent *vmeext;
	char vmemap[EXTENT_FIXED_STORAGE_SIZE(8)];

	struct vme_chipset_tag sc_vct;
};

struct cfattach btvmeii_ca = {
	sizeof(struct b3_2706_softc), b3_2706_match, b3_2706_attach,
#if 0
	b3_2706_detach
#endif
};

/*
 * The adapter consists of a DEC PCI-PCI-bridge with two
 * PCI devices behind it: A Tundra Universe as device 4 and
 * some FPGA with glue logics as device 8.
 * As long as the autoconf code doesn't provide more support
 * for dependant devices, we have to duplicate a part of the
 * "ppb" functions here.
 */

static int
b3_2706_match(parent, match, aux)
	struct device *parent;
	struct cfdata *match;
	void *aux;
{
	struct pci_attach_args *pa = aux;
	pci_chipset_tag_t pc = pa->pa_pc;
	int secbus;
	pcitag_t tag;
	pcireg_t id;

	if ((PCI_VENDOR(pa->pa_id) != PCI_VENDOR_DEC)
	    || (PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_DEC_21152))
		return (0);

	secbus = PPB_BUSINFO_SECONDARY(pci_conf_read(pc, pa->pa_tag,
						     PPB_REG_BUSINFO));
	if (secbus == 0) {
		printf("b3_2706_match: ppb not configured\n");
		return (0);
	}

	tag = pci_make_tag(pc, secbus, 4, 0);
	id = pci_conf_read(pc, tag, PCI_ID_REG);

	if ((PCI_VENDOR(id) != PCI_VENDOR_NEWBRIDGE)
	    || (PCI_PRODUCT(id) != PCI_PRODUCT_NEWBRIDGE_CA91CX42)) {
#ifdef DEBUG
		printf("b3_2706_match: no tundra\n");
#endif
		return (0);
	}

	tag = pci_make_tag(pc, secbus, 8, 0);
	id = pci_conf_read(pc, tag, PCI_ID_REG);

	if ((PCI_VENDOR(id) != PCI_VENDOR_BIT3)
	    || (PCI_PRODUCT(id) != PCI_PRODUCT_BIT3_PCIVME2706)) {
#ifdef DEBUG
		printf("b3_2706_match: no bit3 chip\n");
#endif
		return (0);
	}

	return (5); /* beat "ppb" */
}

static void
b3_2706_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct b3_2706_softc *sc = (struct b3_2706_softc *)self;
	struct pci_attach_args *pa = aux;
	pci_chipset_tag_t pc = pa->pa_pc;
	struct pci_attach_args aa;
	int secbus;
	pcireg_t intr;
	pcitag_t tag;
	bus_addr_t swappbase;
	int i;

	struct vmebus_attach_args vaa;

	printf("\n");

	secbus = PPB_BUSINFO_SECONDARY(pci_conf_read(pc, pa->pa_tag,
						     PPB_REG_BUSINFO));

	bcopy(pa, &aa, sizeof(struct pci_attach_args));
	aa.pa_device = 4;
	aa.pa_function = 0;
	aa.pa_tag = pci_make_tag(pc, secbus, 4, 0);
	aa.pa_intrswiz += 4;
	intr = pci_conf_read(pc, aa.pa_tag, PCI_INTERRUPT_REG);
	/*
	 * swizzle it based on the number of
	 * busses we're behind and our device
	 * number.
	 */
	aa.pa_intrpin =	((1 + aa.pa_intrswiz - 1) % 4) + 1;
	aa.pa_intrline = PCI_INTERRUPT_LINE(intr);

	if (univ_pci_attach(&sc->univdata, &aa)) {
		printf("%s: error initializing universe chip\n",
		       self->dv_xname);
		return;
	}

	tag = pci_make_tag(pc, secbus, 8, 0);
	sc->swapt = pa->pa_memt;
	if (pci_mapreg_info(pc, tag, 0x10,
			    PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
			    &swappbase, 0, 0) ||
	    bus_space_map(sc->swapt, swappbase, 4, 0, &sc->swaph)) {
		printf("%s: can't map byteswap register\n", self->dv_xname);
		return;
	}
	sc->vmet = pa->pa_memt;
	if (pci_mapreg_info(pc, tag, 0x14,
			    PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
			    &sc->vmepbase, 0, 0)) {
		printf("%s: VME range not assigned\n", self->dv_xname);
		return;
	}
	printf("%s: VME window @%lx\n", self->dv_xname, (long)sc->vmepbase);

	for (i = 0; i < 8; i++) {
		univ_pci_unmapvme(&sc->univdata, i);
		sc->windowused[i] = 0;
	}

	sc->vmeext = extent_create("pcivme", sc->vmepbase,
				   sc->vmepbase + 32*1024*1024 - 1, M_DEVBUF,
				   sc->vmemap, sizeof(sc->vmemap),
				   EX_NOCOALESCE);

	sc->sc_vct.cookie = self;
	sc->sc_vct.vct_probe = b3_2706_vme_probe;
	sc->sc_vct.vct_map = b3_2706_map_vme;
	sc->sc_vct.vct_unmap = b3_2706_unmap_vme;
	sc->sc_vct.vct_int_map = b3_2706_map_vmeint;
	sc->sc_vct.vct_int_establish = b3_2706_establish_vmeint;
	sc->sc_vct.vct_int_disestablish = b3_2706_disestablish_vmeint;
	sc->sc_vct.vct_dmamap_create = b3_2706_dmamap_create;
	sc->sc_vct.vct_dmamap_destroy = b3_2706_dmamap_destroy;
	sc->sc_vct.vct_dmamem_alloc = b3_2706_dmamem_alloc;
	sc->sc_vct.vct_dmamem_free = b3_2706_dmamem_free;

	vaa.va_vct = &(sc->sc_vct);
	vaa.va_bdt = pa->pa_dmat; /* XXX */
	vaa.va_slaveconfig = 0; /* XXX */

	config_found(self, &vaa, 0);
}

#define sc ((struct b3_2706_softc*)vsc)

int
b3_2706_map_vme(vsc, vmeaddr, len, am, datasizes, swap, tag, handle, resc)
	void *vsc;
	vme_addr_t vmeaddr;
	vme_size_t len;
	vme_am_t am;
	vme_datasize_t datasizes;
	vme_swap_t swap;
	bus_space_tag_t *tag;
	bus_space_handle_t *handle;
	vme_mapresc_t *resc;
{
	int idx, i, wnd, res;
	unsigned long boundary, maplen, pcibase;
	vme_addr_t vmebase, vmeend;
	static int windoworder[8] = {1, 2, 3, 5, 6, 7, 0, 4};

	/* prefer windows with fine granularity for small mappings */
	wnd = -1;
	if (len <= 32*1024)
		idx = 6;
	else
		idx = 0;
	for (i = 0; i < 8; i++) {
		if (!sc->windowused[windoworder[idx]]) {
			wnd = windoworder[idx];
			sc->windowused[wnd] = 1;
			break;
		}
		idx = (idx + 1) % 8;
	}
	if (wnd == -1)
		return (ENOSPC);

	boundary = (wnd & 3) ? 64*1024 : 4*1024;

	/* first mapped address */
	vmebase = vmeaddr & ~(boundary - 1);
	/* base of last mapped page */
	vmeend = (vmeaddr + len - 1) & ~(boundary - 1);
	/* bytes in outgoing window required */
	maplen = vmeend - vmebase + boundary;

	if (extent_alloc(sc->vmeext, maplen, boundary, 0, EX_FAST, &pcibase))
		return (ENOMEM);

	res = univ_pci_mapvme(&sc->univdata, wnd, vmebase, maplen,
			      am, datasizes, pcibase);
	if (res) {
		extent_free(sc->vmeext, pcibase, maplen, 0);
		return (res);
	}

	res = bus_space_map(sc->vmet, pcibase + (vmeaddr - vmebase), len,
			    0, handle);
	if (res) {
		univ_pci_unmapvme(&sc->univdata, wnd);
		extent_free(sc->vmeext, pcibase, maplen, 0);
		return (res);
	}

	*tag = sc->vmet;

	/*
	 * save all data needed for later unmapping
	 */
	sc->vmemaprescs[wnd].wnd = wnd;
	sc->vmemaprescs[wnd].pcibase = pcibase;
	sc->vmemaprescs[wnd].maplen = maplen;
	sc->vmemaprescs[wnd].handle = *handle;
	sc->vmemaprescs[wnd].len = len;
	*resc = &sc->vmemaprescs[wnd];
	return (0);
}

void
b3_2706_unmap_vme(vsc, resc)
	void *vsc;
	vme_mapresc_t resc;
{
	struct b3_2706_vmemaprescs *r = resc;

	bus_space_unmap(sc->vmet, r->handle, r->len);
	extent_free(sc->vmeext, r->pcibase, r->maplen, 0);

	if (!sc->windowused[r->wnd])
		panic("b3_2706_unmap_vme: bad window");
	univ_pci_unmapvme(&sc->univdata, r->wnd);
	sc->windowused[r->wnd] = 0;
}

int
b3_2706_vme_probe(vsc, addr, len, am, datasize, callback, cbarg)
	void *vsc;
	vme_addr_t addr;
	vme_size_t len;
	vme_am_t am;
	vme_datasize_t datasize;
	int (*callback) __P((void *, bus_space_tag_t, bus_space_handle_t));
	void *cbarg;
{
	return (EINVAL);
}

int
b3_2706_map_vmeint(vsc, level, vector, handlep)
	void *vsc;
	int level, vector;
	vme_intr_handle_t *handlep;
{
	return (EINVAL);
}

void *
b3_2706_establish_vmeint(vsc, handle, prior, func, arg)
	void *vsc;
	vme_intr_handle_t handle;
	int prior;
	int (*func) __P((void *));
	void *arg;
{
	return (NULL);
}

void
b3_2706_disestablish_vmeint(vsc, cookie)
	void *vsc;
	void *cookie;
{
}

int
b3_2706_dmamap_create(vsc, len, am, datasize, swap,
		      nsegs, segsz, bound,
		      flags, mapp)
	void *vsc;
	vme_size_t len;
	vme_am_t am;
	vme_datasize_t datasize;
	vme_swap_t swap;
	int nsegs;
	vme_size_t segsz;
	vme_addr_t bound;
	int flags;
	bus_dmamap_t *mapp;
{
	return (EINVAL);
}

void
b3_2706_dmamap_destroy(vsc, map)
	void *vsc;
	bus_dmamap_t map;
{
}

int
b3_2706_dmamem_alloc(vsc, len, am, datasizes, swap, segs, nsegs, rsegs, flags)
	void *vsc;
	vme_size_t len;
	vme_am_t am;
	vme_datasize_t datasizes;
	vme_swap_t swap;
	bus_dma_segment_t *segs;
	int nsegs;
	int *rsegs;
	int flags;
{
	return (EINVAL);
}

void
b3_2706_dmamem_free(vsc, segs, nsegs)
	void *vsc;
	bus_dma_segment_t *segs;
	int nsegs;
{
}

#undef sc