/* $NetBSD: tsp_pci.c,v 1.12 2021/06/25 03:45:59 thorpej 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.
 */

#include <sys/cdefs.h>

__KERNEL_RCSID(0, "$NetBSD: tsp_pci.c,v 1.12 2021/06/25 03:45:59 thorpej Exp $");

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

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

#include <machine/autoconf.h>
#include <machine/rpb.h>

#include <alpha/pci/tsreg.h>
#include <alpha/pci/tsvar.h>

#define tsp_pci() { Generate ctags(1) key. }

static pcireg_t tsp_conf_read(void *, pcitag_t, int);
static void     tsp_conf_write(void *, pcitag_t, int, pcireg_t);

void
tsp_pci_init(pci_chipset_tag_t pc, void *v)
{
        pc->pc_conf_v = v;
        pc->pc_conf_read = tsp_conf_read;
        pc->pc_conf_write = tsp_conf_write;
}

/*
 * Tsunami makes this a lot easier than it used to be, automatically
 * generating type 0 or type 1 cycles, and quietly returning -1 with
 * no errors on unanswered probes.
 */
static pcireg_t
tsp_conf_read(void *cpv, pcitag_t tag, int offset)
{
        pcireg_t *datap, data;
        struct tsp_config *pcp = cpv;

        if ((unsigned int)offset >= PCI_CONF_SIZE)
                return (pcireg_t) -1;

        datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
        alpha_mb();
        data = *datap;
        alpha_mb();
        return data;
}

static void
tsp_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
{
        pcireg_t *datap;
        struct tsp_config *pcp = cpv;

        if ((unsigned int)offset >= PCI_CONF_SIZE)
                return;

        datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
        alpha_mb();
        *datap = data;
        alpha_mb();
}

#define NTH_STR(n, ...) ((const char *[]){ __VA_ARGS__ }[n])

void
tsp_print_error(unsigned int indent, unsigned long p_error)
{
        char buf[40];

        if (PER_INV(p_error)) {
                IPRINTF(indent, "data invalid\n");
                return;
        }

        if (!PER_ERR(p_error))
                return;

        snprintb(buf, 40,
                 "\177\20"
                 "b\0Error lost\0"
                 "b\1PCI SERR#\0"
                 "b\2PCI PERR#\0"
                 "b\3Delayed completion retry timeout\0"
                 "b\4Invalid S/G page table entry\0"
                 "b\5Address parity error\0"
                 "b\6Target abort\0"
                 "b\7PCI read data parity error\0"
                 "b\10no PCI DEVSEL#\0"
                 "b\11unknown\0"
                 "b\12Uncorrectable ECC\0"
                 "b\13Correctable ECC\0",
                 PER_ERR(p_error));
        IPRINTF(indent, "error    = %s\n", buf);
        
        if (PER_ECC(p_error)) {
                IPRINTF(indent, "address  = 0x%09lx\n", PER_SADR(p_error));
                IPRINTF(indent, "command  = 0x%lx<%s>\n", PER_CMD(p_error),
                        NTH_STR(PER_CMD(p_error) & 0x3,
                                "DMA read", "DMA RMW", "?", "S/G read"));
                IPRINTF(indent, "syndrome = 0x%02lx\n", PER_SYN(p_error));
        } else {
                IPRINTF(indent, "address  = 0x%08lx, 0x%lx<%s>\n",
                        PER_PADR(p_error), PER_TRNS(p_error),
                        NTH_STR(PER_TRNS(p_error), "No DAC", "DAC SG Win3",
                                "Monster Window", "Monster Window"));
                IPRINTF(indent, "command  = 0x%lx<%s>\n", PER_CMD(p_error),
                        NTH_STR(PER_CMD(p_error),
                                "PCI IACK", "PCI special cycle",
                                "PCI I/O read", "PCI I/O write", "?",
                                "PCI PTP write", "PCI memory read",
                                "PCI memory write", "PCI CSR write",
                                "?", "?", "?", "?", "?", "?", "?"));
        }
}