// SPDX-License-Identifier: GPL-2.0
/* pci_schizo.c: SCHIZO/TOMATILLO specific PCI controller support.
 *
 * Copyright (C) 2001, 2002, 2003, 2007, 2008 David S. Miller (davem@davemloft.net)
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>

#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/pstate.h>
#include <asm/prom.h>
#include <asm/upa.h>

#include "pci_impl.h"
#include "iommu_common.h"

#define DRIVER_NAME     "schizo"
#define PFX             DRIVER_NAME ": "

/* This is a convention that at least Excalibur and Merlin
 * follow.  I suppose the SCHIZO used in Starcat and friends
 * will do similar.
 *
 * The only way I could see this changing is if the newlink
 * block requires more space in Schizo's address space than
 * they predicted, thus requiring an address space reorg when
 * the newer Schizo is taped out.
 */

/* Streaming buffer control register. */
#define SCHIZO_STRBUF_CTRL_LPTR    0x00000000000000f0UL /* LRU Lock Pointer */
#define SCHIZO_STRBUF_CTRL_LENAB   0x0000000000000008UL /* LRU Lock Enable */
#define SCHIZO_STRBUF_CTRL_RRDIS   0x0000000000000004UL /* Rerun Disable */
#define SCHIZO_STRBUF_CTRL_DENAB   0x0000000000000002UL /* Diagnostic Mode Enable */
#define SCHIZO_STRBUF_CTRL_ENAB    0x0000000000000001UL /* Streaming Buffer Enable */

/* IOMMU control register. */
#define SCHIZO_IOMMU_CTRL_RESV     0xfffffffff9000000UL /* Reserved                      */
#define SCHIZO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status      */
#define SCHIZO_IOMMU_CTRL_XLTEERR  0x0000000001000000UL /* Translation Error encountered */
#define SCHIZO_IOMMU_CTRL_LCKEN    0x0000000000800000UL /* Enable translation locking    */
#define SCHIZO_IOMMU_CTRL_LCKPTR   0x0000000000780000UL /* Translation lock pointer      */
#define SCHIZO_IOMMU_CTRL_TSBSZ    0x0000000000070000UL /* TSB Size                      */
#define SCHIZO_IOMMU_TSBSZ_1K      0x0000000000000000UL /* TSB Table 1024 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_2K      0x0000000000010000UL /* TSB Table 2048 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_4K      0x0000000000020000UL /* TSB Table 4096 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_8K      0x0000000000030000UL /* TSB Table 8192 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_16K     0x0000000000040000UL /* TSB Table 16k 8-byte entries  */
#define SCHIZO_IOMMU_TSBSZ_32K     0x0000000000050000UL /* TSB Table 32k 8-byte entries  */
#define SCHIZO_IOMMU_TSBSZ_64K     0x0000000000060000UL /* TSB Table 64k 8-byte entries  */
#define SCHIZO_IOMMU_TSBSZ_128K    0x0000000000070000UL /* TSB Table 128k 8-byte entries */
#define SCHIZO_IOMMU_CTRL_RESV2    0x000000000000fff8UL /* Reserved                      */
#define SCHIZO_IOMMU_CTRL_TBWSZ    0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
#define SCHIZO_IOMMU_CTRL_DENAB    0x0000000000000002UL /* Diagnostic mode enable        */
#define SCHIZO_IOMMU_CTRL_ENAB     0x0000000000000001UL /* IOMMU Enable                  */

/* Schizo config space address format is nearly identical to
 * that of PSYCHO:
 *
 *  32             24 23 16 15    11 10       8 7   2  1 0
 * ---------------------------------------------------------
 * |0 0 0 0 0 0 0 0 0| bus | device | function | reg | 0 0 |
 * ---------------------------------------------------------
 */
#define SCHIZO_CONFIG_BASE(PBM) ((PBM)->config_space)
#define SCHIZO_CONFIG_ENCODE(BUS, DEVFN, REG)   \
        (((unsigned long)(BUS)   << 16) |       \
         ((unsigned long)(DEVFN) << 8)  |       \
         ((unsigned long)(REG)))

static void *schizo_pci_config_mkaddr(struct pci_pbm_info *pbm,
                                      unsigned char bus,
                                      unsigned int devfn,
                                      int where)
{
        if (!pbm)
                return NULL;
        bus -= pbm->pci_first_busno;
        return (void *)
                (SCHIZO_CONFIG_BASE(pbm) |
                 SCHIZO_CONFIG_ENCODE(bus, devfn, where));
}

/* SCHIZO error handling support. */
enum schizo_error_type {
        UE_ERR, CE_ERR, PCI_ERR, SAFARI_ERR
};

static DEFINE_SPINLOCK(stc_buf_lock);
static unsigned long stc_error_buf[128];
static unsigned long stc_tag_buf[16];
static unsigned long stc_line_buf[16];

#define SCHIZO_UE_INO           0x30 /* Uncorrectable ECC error */
#define SCHIZO_CE_INO           0x31 /* Correctable ECC error */
#define SCHIZO_PCIERR_A_INO     0x32 /* PBM A PCI bus error */
#define SCHIZO_PCIERR_B_INO     0x33 /* PBM B PCI bus error */
#define SCHIZO_SERR_INO         0x34 /* Safari interface error */

#define SCHIZO_STC_ERR  0xb800UL /* --> 0xba00 */
#define SCHIZO_STC_TAG  0xba00UL /* --> 0xba80 */
#define SCHIZO_STC_LINE 0xbb00UL /* --> 0xbb80 */

#define SCHIZO_STCERR_WRITE     0x2UL
#define SCHIZO_STCERR_READ      0x1UL

#define SCHIZO_STCTAG_PPN       0x3fffffff00000000UL
#define SCHIZO_STCTAG_VPN       0x00000000ffffe000UL
#define SCHIZO_STCTAG_VALID     0x8000000000000000UL
#define SCHIZO_STCTAG_READ      0x4000000000000000UL

#define SCHIZO_STCLINE_LINDX    0x0000000007800000UL
#define SCHIZO_STCLINE_SPTR     0x000000000007e000UL
#define SCHIZO_STCLINE_LADDR    0x0000000000001fc0UL
#define SCHIZO_STCLINE_EPTR     0x000000000000003fUL
#define SCHIZO_STCLINE_VALID    0x0000000000600000UL
#define SCHIZO_STCLINE_FOFN     0x0000000000180000UL

static void __schizo_check_stc_error_pbm(struct pci_pbm_info *pbm,
                                         enum schizo_error_type type)
{
        struct strbuf *strbuf = &pbm->stc;
        unsigned long regbase = pbm->pbm_regs;
        unsigned long err_base, tag_base, line_base;
        u64 control;
        int i;

        err_base = regbase + SCHIZO_STC_ERR;
        tag_base = regbase + SCHIZO_STC_TAG;
        line_base = regbase + SCHIZO_STC_LINE;

        spin_lock(&stc_buf_lock);

        /* This is __REALLY__ dangerous.  When we put the
         * streaming buffer into diagnostic mode to probe
         * it's tags and error status, we _must_ clear all
         * of the line tag valid bits before re-enabling
         * the streaming buffer.  If any dirty data lives
         * in the STC when we do this, we will end up
         * invalidating it before it has a chance to reach
         * main memory.
         */
        control = upa_readq(strbuf->strbuf_control);
        upa_writeq((control | SCHIZO_STRBUF_CTRL_DENAB),
                   strbuf->strbuf_control);
        for (i = 0; i < 128; i++) {
                unsigned long val;

                val = upa_readq(err_base + (i * 8UL));
                upa_writeq(0UL, err_base + (i * 8UL));
                stc_error_buf[i] = val;
        }
        for (i = 0; i < 16; i++) {
                stc_tag_buf[i] = upa_readq(tag_base + (i * 8UL));
                stc_line_buf[i] = upa_readq(line_base + (i * 8UL));
                upa_writeq(0UL, tag_base + (i * 8UL));
                upa_writeq(0UL, line_base + (i * 8UL));
        }

        /* OK, state is logged, exit diagnostic mode. */
        upa_writeq(control, strbuf->strbuf_control);

        for (i = 0; i < 16; i++) {
                int j, saw_error, first, last;

                saw_error = 0;
                first = i * 8;
                last = first + 8;
                for (j = first; j < last; j++) {
                        unsigned long errval = stc_error_buf[j];
                        if (errval != 0) {
                                saw_error++;
                                printk("%s: STC_ERR(%d)[wr(%d)rd(%d)]\n",
                                       pbm->name,
                                       j,
                                       (errval & SCHIZO_STCERR_WRITE) ? 1 : 0,
                                       (errval & SCHIZO_STCERR_READ) ? 1 : 0);
                        }
                }
                if (saw_error != 0) {
                        unsigned long tagval = stc_tag_buf[i];
                        unsigned long lineval = stc_line_buf[i];
                        printk("%s: STC_TAG(%d)[PA(%016lx)VA(%08lx)V(%d)R(%d)]\n",
                               pbm->name,
                               i,
                               ((tagval & SCHIZO_STCTAG_PPN) >> 19UL),
                               (tagval & SCHIZO_STCTAG_VPN),
                               ((tagval & SCHIZO_STCTAG_VALID) ? 1 : 0),
                               ((tagval & SCHIZO_STCTAG_READ) ? 1 : 0));

                        /* XXX Should spit out per-bank error information... -DaveM */
                        printk("%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)LADDR(%lx)EP(%lx)"
                               "V(%d)FOFN(%d)]\n",
                               pbm->name,
                               i,
                               ((lineval & SCHIZO_STCLINE_LINDX) >> 23UL),
                               ((lineval & SCHIZO_STCLINE_SPTR) >> 13UL),
                               ((lineval & SCHIZO_STCLINE_LADDR) >> 6UL),
                               ((lineval & SCHIZO_STCLINE_EPTR) >> 0UL),
                               ((lineval & SCHIZO_STCLINE_VALID) ? 1 : 0),
                               ((lineval & SCHIZO_STCLINE_FOFN) ? 1 : 0));
                }
        }

        spin_unlock(&stc_buf_lock);
}

/* IOMMU is per-PBM in Schizo, so interrogate both for anonymous
 * controller level errors.
 */

#define SCHIZO_IOMMU_TAG        0xa580UL
#define SCHIZO_IOMMU_DATA       0xa600UL

#define SCHIZO_IOMMU_TAG_CTXT   0x0000001ffe000000UL
#define SCHIZO_IOMMU_TAG_ERRSTS 0x0000000001800000UL
#define SCHIZO_IOMMU_TAG_ERR    0x0000000000400000UL
#define SCHIZO_IOMMU_TAG_WRITE  0x0000000000200000UL
#define SCHIZO_IOMMU_TAG_STREAM 0x0000000000100000UL
#define SCHIZO_IOMMU_TAG_SIZE   0x0000000000080000UL
#define SCHIZO_IOMMU_TAG_VPAGE  0x000000000007ffffUL

#define SCHIZO_IOMMU_DATA_VALID 0x0000000100000000UL
#define SCHIZO_IOMMU_DATA_CACHE 0x0000000040000000UL
#define SCHIZO_IOMMU_DATA_PPAGE 0x000000003fffffffUL

static void schizo_check_iommu_error_pbm(struct pci_pbm_info *pbm,
                                         enum schizo_error_type type)
{
        struct iommu *iommu = pbm->iommu;
        unsigned long iommu_tag[16];
        unsigned long iommu_data[16];
        unsigned long flags;
        u64 control;
        int i;

        spin_lock_irqsave(&iommu->lock, flags);
        control = upa_readq(iommu->iommu_control);
        if (control & SCHIZO_IOMMU_CTRL_XLTEERR) {
                unsigned long base;
                char *type_string;

                /* Clear the error encountered bit. */
                control &= ~SCHIZO_IOMMU_CTRL_XLTEERR;
                upa_writeq(control, iommu->iommu_control);

                switch((control & SCHIZO_IOMMU_CTRL_XLTESTAT) >> 25UL) {
                case 0:
                        type_string = "Protection Error";
                        break;
                case 1:
                        type_string = "Invalid Error";
                        break;
                case 2:
                        type_string = "TimeOut Error";
                        break;
                case 3:
                default:
                        type_string = "ECC Error";
                        break;
                }
                printk("%s: IOMMU Error, type[%s]\n",
                       pbm->name, type_string);

                /* Put the IOMMU into diagnostic mode and probe
                 * it's TLB for entries with error status.
                 *
                 * It is very possible for another DVMA to occur
                 * while we do this probe, and corrupt the system
                 * further.  But we are so screwed at this point
                 * that we are likely to crash hard anyways, so
                 * get as much diagnostic information to the
                 * console as we can.
                 */
                upa_writeq(control | SCHIZO_IOMMU_CTRL_DENAB,
                           iommu->iommu_control);

                base = pbm->pbm_regs;

                for (i = 0; i < 16; i++) {
                        iommu_tag[i] =
                                upa_readq(base + SCHIZO_IOMMU_TAG + (i * 8UL));
                        iommu_data[i] =
                                upa_readq(base + SCHIZO_IOMMU_DATA + (i * 8UL));

                        /* Now clear out the entry. */
                        upa_writeq(0, base + SCHIZO_IOMMU_TAG + (i * 8UL));
                        upa_writeq(0, base + SCHIZO_IOMMU_DATA + (i * 8UL));
                }

                /* Leave diagnostic mode. */
                upa_writeq(control, iommu->iommu_control);

                for (i = 0; i < 16; i++) {
                        unsigned long tag, data;

                        tag = iommu_tag[i];
                        if (!(tag & SCHIZO_IOMMU_TAG_ERR))
                                continue;

                        data = iommu_data[i];
                        switch((tag & SCHIZO_IOMMU_TAG_ERRSTS) >> 23UL) {
                        case 0:
                                type_string = "Protection Error";
                                break;
                        case 1:
                                type_string = "Invalid Error";
                                break;
                        case 2:
                                type_string = "TimeOut Error";
                                break;
                        case 3:
                        default:
                                type_string = "ECC Error";
                                break;
                        }
                        printk("%s: IOMMU TAG(%d)[error(%s) ctx(%x) wr(%d) str(%d) "
                               "sz(%dK) vpg(%08lx)]\n",
                               pbm->name, i, type_string,
                               (int)((tag & SCHIZO_IOMMU_TAG_CTXT) >> 25UL),
                               ((tag & SCHIZO_IOMMU_TAG_WRITE) ? 1 : 0),
                               ((tag & SCHIZO_IOMMU_TAG_STREAM) ? 1 : 0),
                               ((tag & SCHIZO_IOMMU_TAG_SIZE) ? 64 : 8),
                               (tag & SCHIZO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
                        printk("%s: IOMMU DATA(%d)[valid(%d) cache(%d) ppg(%016lx)]\n",
                               pbm->name, i,
                               ((data & SCHIZO_IOMMU_DATA_VALID) ? 1 : 0),
                               ((data & SCHIZO_IOMMU_DATA_CACHE) ? 1 : 0),
                               (data & SCHIZO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT);
                }
        }
        if (pbm->stc.strbuf_enabled)
                __schizo_check_stc_error_pbm(pbm, type);
        spin_unlock_irqrestore(&iommu->lock, flags);
}

static void schizo_check_iommu_error(struct pci_pbm_info *pbm,
                                     enum schizo_error_type type)
{
        schizo_check_iommu_error_pbm(pbm, type);
        if (pbm->sibling)
                schizo_check_iommu_error_pbm(pbm->sibling, type);
}

/* Uncorrectable ECC error status gathering. */
#define SCHIZO_UE_AFSR  0x10030UL
#define SCHIZO_UE_AFAR  0x10038UL

#define SCHIZO_UEAFSR_PPIO      0x8000000000000000UL /* Safari */
#define SCHIZO_UEAFSR_PDRD      0x4000000000000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_PDWR      0x2000000000000000UL /* Safari */
#define SCHIZO_UEAFSR_SPIO      0x1000000000000000UL /* Safari */
#define SCHIZO_UEAFSR_SDMA      0x0800000000000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_ERRPNDG   0x0300000000000000UL /* Safari */
#define SCHIZO_UEAFSR_BMSK      0x000003ff00000000UL /* Safari */
#define SCHIZO_UEAFSR_QOFF      0x00000000c0000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_AID       0x000000001f000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_PARTIAL   0x0000000000800000UL /* Safari */
#define SCHIZO_UEAFSR_OWNEDIN   0x0000000000400000UL /* Safari */
#define SCHIZO_UEAFSR_MTAGSYND  0x00000000000f0000UL /* Safari */
#define SCHIZO_UEAFSR_MTAG      0x000000000000e000UL /* Safari */
#define SCHIZO_UEAFSR_ECCSYND   0x00000000000001ffUL /* Safari */

static irqreturn_t schizo_ue_intr(int irq, void *dev_id)
{
        struct pci_pbm_info *pbm = dev_id;
        unsigned long afsr_reg = pbm->controller_regs + SCHIZO_UE_AFSR;
        unsigned long afar_reg = pbm->controller_regs + SCHIZO_UE_AFAR;
        unsigned long afsr, afar, error_bits;
        int reported, limit;

        /* Latch uncorrectable error status. */
        afar = upa_readq(afar_reg);

        /* If either of the error pending bits are set in the
         * AFSR, the error status is being actively updated by
         * the hardware and we must re-read to get a clean value.
         */
        limit = 1000;
        do {
                afsr = upa_readq(afsr_reg);
        } while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit);

        /* Clear the primary/secondary error status bits. */
        error_bits = afsr &
                (SCHIZO_UEAFSR_PPIO | SCHIZO_UEAFSR_PDRD | SCHIZO_UEAFSR_PDWR |
                 SCHIZO_UEAFSR_SPIO | SCHIZO_UEAFSR_SDMA);
        if (!error_bits)
                return IRQ_NONE;
        upa_writeq(error_bits, afsr_reg);

        /* Log the error. */
        printk("%s: Uncorrectable Error, primary error type[%s]\n",
               pbm->name,
               (((error_bits & SCHIZO_UEAFSR_PPIO) ?
                 "PIO" :
                 ((error_bits & SCHIZO_UEAFSR_PDRD) ?
                  "DMA Read" :
                  ((error_bits & SCHIZO_UEAFSR_PDWR) ?
                   "DMA Write" : "???")))));
        printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n",
               pbm->name,
               (afsr & SCHIZO_UEAFSR_BMSK) >> 32UL,
               (afsr & SCHIZO_UEAFSR_QOFF) >> 30UL,
               (afsr & SCHIZO_UEAFSR_AID) >> 24UL);
        printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n",
               pbm->name,
               (afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0,
               (afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0,
               (afsr & SCHIZO_UEAFSR_MTAG) >> 13UL,
               (afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL,
               (afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL);
        printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
        printk("%s: UE Secondary errors [", pbm->name);
        reported = 0;
        if (afsr & SCHIZO_UEAFSR_SPIO) {
                reported++;
                printk("(PIO)");
        }
        if (afsr & SCHIZO_UEAFSR_SDMA) {
                reported++;
                printk("(DMA)");
        }
        if (!reported)
                printk("(none)");
        printk("]\n");

        /* Interrogate IOMMU for error status. */
        schizo_check_iommu_error(pbm, UE_ERR);

        return IRQ_HANDLED;
}

#define SCHIZO_CE_AFSR  0x10040UL
#define SCHIZO_CE_AFAR  0x10048UL

#define SCHIZO_CEAFSR_PPIO      0x8000000000000000UL
#define SCHIZO_CEAFSR_PDRD      0x4000000000000000UL
#define SCHIZO_CEAFSR_PDWR      0x2000000000000000UL
#define SCHIZO_CEAFSR_SPIO      0x1000000000000000UL
#define SCHIZO_CEAFSR_SDMA      0x0800000000000000UL
#define SCHIZO_CEAFSR_ERRPNDG   0x0300000000000000UL
#define SCHIZO_CEAFSR_BMSK      0x000003ff00000000UL
#define SCHIZO_CEAFSR_QOFF      0x00000000c0000000UL
#define SCHIZO_CEAFSR_AID       0x000000001f000000UL
#define SCHIZO_CEAFSR_PARTIAL   0x0000000000800000UL
#define SCHIZO_CEAFSR_OWNEDIN   0x0000000000400000UL
#define SCHIZO_CEAFSR_MTAGSYND  0x00000000000f0000UL
#define SCHIZO_CEAFSR_MTAG      0x000000000000e000UL
#define SCHIZO_CEAFSR_ECCSYND   0x00000000000001ffUL

static irqreturn_t schizo_ce_intr(int irq, void *dev_id)
{
        struct pci_pbm_info *pbm = dev_id;
        unsigned long afsr_reg = pbm->controller_regs + SCHIZO_CE_AFSR;
        unsigned long afar_reg = pbm->controller_regs + SCHIZO_CE_AFAR;
        unsigned long afsr, afar, error_bits;
        int reported, limit;

        /* Latch error status. */
        afar = upa_readq(afar_reg);

        /* If either of the error pending bits are set in the
         * AFSR, the error status is being actively updated by
         * the hardware and we must re-read to get a clean value.
         */
        limit = 1000;
        do {
                afsr = upa_readq(afsr_reg);
        } while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit);

        /* Clear primary/secondary error status bits. */
        error_bits = afsr &
                (SCHIZO_CEAFSR_PPIO | SCHIZO_CEAFSR_PDRD | SCHIZO_CEAFSR_PDWR |
                 SCHIZO_CEAFSR_SPIO | SCHIZO_CEAFSR_SDMA);
        if (!error_bits)
                return IRQ_NONE;
        upa_writeq(error_bits, afsr_reg);

        /* Log the error. */
        printk("%s: Correctable Error, primary error type[%s]\n",
               pbm->name,
               (((error_bits & SCHIZO_CEAFSR_PPIO) ?
                 "PIO" :
                 ((error_bits & SCHIZO_CEAFSR_PDRD) ?
                  "DMA Read" :
                  ((error_bits & SCHIZO_CEAFSR_PDWR) ?
                   "DMA Write" : "???")))));

        /* XXX Use syndrome and afar to print out module string just like
         * XXX UDB CE trap handler does... -DaveM
         */
        printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n",
               pbm->name,
               (afsr & SCHIZO_UEAFSR_BMSK) >> 32UL,
               (afsr & SCHIZO_UEAFSR_QOFF) >> 30UL,
               (afsr & SCHIZO_UEAFSR_AID) >> 24UL);
        printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n",
               pbm->name,
               (afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0,
               (afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0,
               (afsr & SCHIZO_UEAFSR_MTAG) >> 13UL,
               (afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL,
               (afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL);
        printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
        printk("%s: CE Secondary errors [", pbm->name);
        reported = 0;
        if (afsr & SCHIZO_CEAFSR_SPIO) {
                reported++;
                printk("(PIO)");
        }
        if (afsr & SCHIZO_CEAFSR_SDMA) {
                reported++;
                printk("(DMA)");
        }
        if (!reported)
                printk("(none)");
        printk("]\n");

        return IRQ_HANDLED;
}

#define SCHIZO_PCI_AFSR 0x2010UL
#define SCHIZO_PCI_AFAR 0x2018UL

#define SCHIZO_PCIAFSR_PMA      0x8000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PTA      0x4000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PRTRY    0x2000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PPERR    0x1000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PTTO     0x0800000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PUNUS    0x0400000000000000UL /* Schizo */
#define SCHIZO_PCIAFSR_SMA      0x0200000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_STA      0x0100000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_SRTRY    0x0080000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_SPERR    0x0040000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_STTO     0x0020000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_SUNUS    0x0010000000000000UL /* Schizo */
#define SCHIZO_PCIAFSR_BMSK     0x000003ff00000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_BLK      0x0000000080000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_CFG      0x0000000040000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_MEM      0x0000000020000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_IO       0x0000000010000000UL /* Schizo/Tomatillo */

#define SCHIZO_PCI_CTRL         (0x2000UL)
#define SCHIZO_PCICTRL_BUS_UNUS (1UL << 63UL) /* Safari */
#define SCHIZO_PCICTRL_DTO_INT  (1UL << 61UL) /* Tomatillo */
#define SCHIZO_PCICTRL_ARB_PRIO (0x1ff << 52UL) /* Tomatillo */
#define SCHIZO_PCICTRL_ESLCK    (1UL << 51UL) /* Safari */
#define SCHIZO_PCICTRL_ERRSLOT  (7UL << 48UL) /* Safari */
#define SCHIZO_PCICTRL_TTO_ERR  (1UL << 38UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_RTRY_ERR (1UL << 37UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_DTO_ERR  (1UL << 36UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_SBH_ERR  (1UL << 35UL) /* Safari */
#define SCHIZO_PCICTRL_SERR     (1UL << 34UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PCISPD   (1UL << 33UL) /* Safari */
#define SCHIZO_PCICTRL_MRM_PREF (1UL << 30UL) /* Tomatillo */
#define SCHIZO_PCICTRL_RDO_PREF (1UL << 29UL) /* Tomatillo */
#define SCHIZO_PCICTRL_RDL_PREF (1UL << 28UL) /* Tomatillo */
#define SCHIZO_PCICTRL_PTO      (3UL << 24UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PTO_SHIFT 24UL
#define SCHIZO_PCICTRL_TRWSW    (7UL << 21UL) /* Tomatillo */
#define SCHIZO_PCICTRL_F_TGT_A  (1UL << 20UL) /* Tomatillo */
#define SCHIZO_PCICTRL_S_DTO_INT (1UL << 19UL) /* Safari */
#define SCHIZO_PCICTRL_F_TGT_RT (1UL << 19UL) /* Tomatillo */
#define SCHIZO_PCICTRL_SBH_INT  (1UL << 18UL) /* Safari */
#define SCHIZO_PCICTRL_T_DTO_INT (1UL << 18UL) /* Tomatillo */
#define SCHIZO_PCICTRL_EEN      (1UL << 17UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PARK     (1UL << 16UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PCIRST   (1UL <<  8UL) /* Safari */
#define SCHIZO_PCICTRL_ARB_S    (0x3fUL << 0UL) /* Safari */
#define SCHIZO_PCICTRL_ARB_T    (0xffUL << 0UL) /* Tomatillo */

static irqreturn_t schizo_pcierr_intr_other(struct pci_pbm_info *pbm)
{
        unsigned long csr_reg, csr, csr_error_bits;
        irqreturn_t ret = IRQ_NONE;
        u32 stat;

        csr_reg = pbm->pbm_regs + SCHIZO_PCI_CTRL;
        csr = upa_readq(csr_reg);
        csr_error_bits =
                csr & (SCHIZO_PCICTRL_BUS_UNUS |
                       SCHIZO_PCICTRL_TTO_ERR |
                       SCHIZO_PCICTRL_RTRY_ERR |
                       SCHIZO_PCICTRL_DTO_ERR |
                       SCHIZO_PCICTRL_SBH_ERR |
                       SCHIZO_PCICTRL_SERR);
        if (csr_error_bits) {
                /* Clear the errors.  */
                upa_writeq(csr, csr_reg);

                /* Log 'em.  */
                if (csr_error_bits & SCHIZO_PCICTRL_BUS_UNUS)
                        printk("%s: Bus unusable error asserted.\n",
                               pbm->name);
                if (csr_error_bits & SCHIZO_PCICTRL_TTO_ERR)
                        printk("%s: PCI TRDY# timeout error asserted.\n",
                               pbm->name);
                if (csr_error_bits & SCHIZO_PCICTRL_RTRY_ERR)
                        printk("%s: PCI excessive retry error asserted.\n",
                               pbm->name);
                if (csr_error_bits & SCHIZO_PCICTRL_DTO_ERR)
                        printk("%s: PCI discard timeout error asserted.\n",
                               pbm->name);
                if (csr_error_bits & SCHIZO_PCICTRL_SBH_ERR)
                        printk("%s: PCI streaming byte hole error asserted.\n",
                               pbm->name);
                if (csr_error_bits & SCHIZO_PCICTRL_SERR)
                        printk("%s: PCI SERR signal asserted.\n",
                               pbm->name);
                ret = IRQ_HANDLED;
        }
        pbm->pci_ops->read(pbm->pci_bus, 0, PCI_STATUS, 2, &stat);
        if (stat & (PCI_STATUS_PARITY |
                    PCI_STATUS_SIG_TARGET_ABORT |
                    PCI_STATUS_REC_TARGET_ABORT |
                    PCI_STATUS_REC_MASTER_ABORT |
                    PCI_STATUS_SIG_SYSTEM_ERROR)) {
                printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
                       pbm->name, stat);
                pbm->pci_ops->write(pbm->pci_bus, 0, PCI_STATUS, 2, 0xffff);
                ret = IRQ_HANDLED;
        }
        return ret;
}

static irqreturn_t schizo_pcierr_intr(int irq, void *dev_id)
{
        struct pci_pbm_info *pbm = dev_id;
        unsigned long afsr_reg, afar_reg, base;
        unsigned long afsr, afar, error_bits;
        int reported;

        base = pbm->pbm_regs;

        afsr_reg = base + SCHIZO_PCI_AFSR;
        afar_reg = base + SCHIZO_PCI_AFAR;

        /* Latch error status. */
        afar = upa_readq(afar_reg);
        afsr = upa_readq(afsr_reg);

        /* Clear primary/secondary error status bits. */
        error_bits = afsr &
                (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
                 SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
                 SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
                 SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
                 SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
                 SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS);
        if (!error_bits)
                return schizo_pcierr_intr_other(pbm);
        upa_writeq(error_bits, afsr_reg);

        /* Log the error. */
        printk("%s: PCI Error, primary error type[%s]\n",
               pbm->name,
               (((error_bits & SCHIZO_PCIAFSR_PMA) ?
                 "Master Abort" :
                 ((error_bits & SCHIZO_PCIAFSR_PTA) ?
                  "Target Abort" :
                  ((error_bits & SCHIZO_PCIAFSR_PRTRY) ?
                   "Excessive Retries" :
                   ((error_bits & SCHIZO_PCIAFSR_PPERR) ?
                    "Parity Error" :
                    ((error_bits & SCHIZO_PCIAFSR_PTTO) ?
                     "Timeout" :
                     ((error_bits & SCHIZO_PCIAFSR_PUNUS) ?
                      "Bus Unusable" : "???"))))))));
        printk("%s: bytemask[%04lx] was_block(%d) space(%s)\n",
               pbm->name,
               (afsr & SCHIZO_PCIAFSR_BMSK) >> 32UL,
               (afsr & SCHIZO_PCIAFSR_BLK) ? 1 : 0,
               ((afsr & SCHIZO_PCIAFSR_CFG) ?
                "Config" :
                ((afsr & SCHIZO_PCIAFSR_MEM) ?
                 "Memory" :
                 ((afsr & SCHIZO_PCIAFSR_IO) ?
                  "I/O" : "???"))));
        printk("%s: PCI AFAR [%016lx]\n",
               pbm->name, afar);
        printk("%s: PCI Secondary errors [",
               pbm->name);
        reported = 0;
        if (afsr & SCHIZO_PCIAFSR_SMA) {
                reported++;
                printk("(Master Abort)");
        }
        if (afsr & SCHIZO_PCIAFSR_STA) {
                reported++;
                printk("(Target Abort)");
        }
        if (afsr & SCHIZO_PCIAFSR_SRTRY) {
                reported++;
                printk("(Excessive Retries)");
        }
        if (afsr & SCHIZO_PCIAFSR_SPERR) {
                reported++;
                printk("(Parity Error)");
        }
        if (afsr & SCHIZO_PCIAFSR_STTO) {
                reported++;
                printk("(Timeout)");
        }
        if (afsr & SCHIZO_PCIAFSR_SUNUS) {
                reported++;
                printk("(Bus Unusable)");
        }
        if (!reported)
                printk("(none)");
        printk("]\n");

        /* For the error types shown, scan PBM's PCI bus for devices
         * which have logged that error type.
         */

        /* If we see a Target Abort, this could be the result of an
         * IOMMU translation error of some sort.  It is extremely
         * useful to log this information as usually it indicates
         * a bug in the IOMMU support code or a PCI device driver.
         */
        if (error_bits & (SCHIZO_PCIAFSR_PTA | SCHIZO_PCIAFSR_STA)) {
                schizo_check_iommu_error(pbm, PCI_ERR);
                pci_scan_for_target_abort(pbm, pbm->pci_bus);
        }
        if (error_bits & (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_SMA))
                pci_scan_for_master_abort(pbm, pbm->pci_bus);

        /* For excessive retries, PSYCHO/PBM will abort the device
         * and there is no way to specifically check for excessive
         * retries in the config space status registers.  So what
         * we hope is that we'll catch it via the master/target
         * abort events.
         */

        if (error_bits & (SCHIZO_PCIAFSR_PPERR | SCHIZO_PCIAFSR_SPERR))
                pci_scan_for_parity_error(pbm, pbm->pci_bus);

        return IRQ_HANDLED;
}

#define SCHIZO_SAFARI_ERRLOG    0x10018UL

#define SAFARI_ERRLOG_ERROUT    0x8000000000000000UL

#define BUS_ERROR_BADCMD        0x4000000000000000UL /* Schizo/Tomatillo */
#define BUS_ERROR_SSMDIS        0x2000000000000000UL /* Safari */
#define BUS_ERROR_BADMA         0x1000000000000000UL /* Safari */
#define BUS_ERROR_BADMB         0x0800000000000000UL /* Safari */
#define BUS_ERROR_BADMC         0x0400000000000000UL /* Safari */
#define BUS_ERROR_SNOOP_GR      0x0000000000200000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_PCI     0x0000000000100000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RD      0x0000000000080000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RDS     0x0000000000020000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RDSA    0x0000000000010000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_OWN     0x0000000000008000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RDO     0x0000000000004000UL /* Tomatillo */
#define BUS_ERROR_CPU1PS        0x0000000000002000UL /* Safari */
#define BUS_ERROR_WDATA_PERR    0x0000000000002000UL /* Tomatillo */
#define BUS_ERROR_CPU1PB        0x0000000000001000UL /* Safari */
#define BUS_ERROR_CTRL_PERR     0x0000000000001000UL /* Tomatillo */
#define BUS_ERROR_CPU0PS        0x0000000000000800UL /* Safari */
#define BUS_ERROR_SNOOP_ERR     0x0000000000000800UL /* Tomatillo */
#define BUS_ERROR_CPU0PB        0x0000000000000400UL /* Safari */
#define BUS_ERROR_JBUS_ILL_B    0x0000000000000400UL /* Tomatillo */
#define BUS_ERROR_CIQTO         0x0000000000000200UL /* Safari */
#define BUS_ERROR_LPQTO         0x0000000000000100UL /* Safari */
#define BUS_ERROR_JBUS_ILL_C    0x0000000000000100UL /* Tomatillo */
#define BUS_ERROR_SFPQTO        0x0000000000000080UL /* Safari */
#define BUS_ERROR_UFPQTO        0x0000000000000040UL /* Safari */
#define BUS_ERROR_RD_PERR       0x0000000000000040UL /* Tomatillo */
#define BUS_ERROR_APERR         0x0000000000000020UL /* Safari/Tomatillo */
#define BUS_ERROR_UNMAP         0x0000000000000010UL /* Safari/Tomatillo */
#define BUS_ERROR_BUSERR        0x0000000000000004UL /* Safari/Tomatillo */
#define BUS_ERROR_TIMEOUT       0x0000000000000002UL /* Safari/Tomatillo */
#define BUS_ERROR_ILL           0x0000000000000001UL /* Safari */

/* We only expect UNMAP errors here.  The rest of the Safari errors
 * are marked fatal and thus cause a system reset.
 */
static irqreturn_t schizo_safarierr_intr(int irq, void *dev_id)
{
        struct pci_pbm_info *pbm = dev_id;
        u64 errlog;

        errlog = upa_readq(pbm->controller_regs + SCHIZO_SAFARI_ERRLOG);
        upa_writeq(errlog & ~(SAFARI_ERRLOG_ERROUT),
                   pbm->controller_regs + SCHIZO_SAFARI_ERRLOG);

        if (!(errlog & BUS_ERROR_UNMAP)) {
                printk("%s: Unexpected Safari/JBUS error interrupt, errlog[%016llx]\n",
                       pbm->name, errlog);

                return IRQ_HANDLED;
        }

        printk("%s: Safari/JBUS interrupt, UNMAPPED error, interrogating IOMMUs.\n",
               pbm->name);
        schizo_check_iommu_error(pbm, SAFARI_ERR);

        return IRQ_HANDLED;
}

/* Nearly identical to PSYCHO equivalents... */
#define SCHIZO_ECC_CTRL         0x10020UL
#define  SCHIZO_ECCCTRL_EE       0x8000000000000000UL /* Enable ECC Checking */
#define  SCHIZO_ECCCTRL_UE       0x4000000000000000UL /* Enable UE Interrupts */
#define  SCHIZO_ECCCTRL_CE       0x2000000000000000UL /* Enable CE INterrupts */

#define SCHIZO_SAFARI_ERRCTRL   0x10008UL
#define  SCHIZO_SAFERRCTRL_EN    0x8000000000000000UL
#define SCHIZO_SAFARI_IRQCTRL   0x10010UL
#define  SCHIZO_SAFIRQCTRL_EN    0x8000000000000000UL

static int pbm_routes_this_ino(struct pci_pbm_info *pbm, u32 ino)
{
        ino &= IMAP_INO;

        if (pbm->ino_bitmap & (1UL << ino))
                return 1;

        return 0;
}

/* How the Tomatillo IRQs are routed around is pure guesswork here.
 *
 * All the Tomatillo devices I see in prtconf dumps seem to have only
 * a single PCI bus unit attached to it.  It would seem they are separate
 * devices because their PortID (ie. JBUS ID) values are all different
 * and thus the registers are mapped to totally different locations.
 *
 * However, two Tomatillo's look "similar" in that the only difference
 * in their PortID is the lowest bit.
 *
 * So if we were to ignore this lower bit, it certainly looks like two
 * PCI bus units of the same Tomatillo.  I still have not really
 * figured this out...
 */
static void tomatillo_register_error_handlers(struct pci_pbm_info *pbm)
{
        struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
        u64 tmp, err_mask, err_no_mask;
        int err;

        /* Tomatillo IRQ property layout is:
         * 0: PCIERR
         * 1: UE ERR
         * 2: CE ERR
         * 3: SERR
         * 4: POWER FAIL?
         */

        if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) {
                err = request_irq(op->archdata.irqs[1], schizo_ue_intr, 0,
                                  "TOMATILLO_UE", pbm);
                if (err)
                        printk(KERN_WARNING "%s: Could not register UE, "
                               "err=%d\n", pbm->name, err);
        }
        if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) {
                err = request_irq(op->archdata.irqs[2], schizo_ce_intr, 0,
                                  "TOMATILLO_CE", pbm);
                if (err)
                        printk(KERN_WARNING "%s: Could not register CE, "
                               "err=%d\n", pbm->name, err);
        }
        err = 0;
        if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) {
                err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
                                  "TOMATILLO_PCIERR", pbm);
        } else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) {
                err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
                                  "TOMATILLO_PCIERR", pbm);
        }
        if (err)
                printk(KERN_WARNING "%s: Could not register PCIERR, "
                       "err=%d\n", pbm->name, err);

        if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) {
                err = request_irq(op->archdata.irqs[3], schizo_safarierr_intr, 0,
                                  "TOMATILLO_SERR", pbm);
                if (err)
                        printk(KERN_WARNING "%s: Could not register SERR, "
                               "err=%d\n", pbm->name, err);
        }

        /* Enable UE and CE interrupts for controller. */
        upa_writeq((SCHIZO_ECCCTRL_EE |
                    SCHIZO_ECCCTRL_UE |
                    SCHIZO_ECCCTRL_CE), pbm->controller_regs + SCHIZO_ECC_CTRL);

        /* Enable PCI Error interrupts and clear error
         * bits.
         */
        err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
                    SCHIZO_PCICTRL_TTO_ERR |
                    SCHIZO_PCICTRL_RTRY_ERR |
                    SCHIZO_PCICTRL_SERR |
                    SCHIZO_PCICTRL_EEN);

        err_no_mask = SCHIZO_PCICTRL_DTO_ERR;

        tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL);
        tmp |= err_mask;
        tmp &= ~err_no_mask;
        upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL);

        err_mask = (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
                    SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
                    SCHIZO_PCIAFSR_PTTO |
                    SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
                    SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
                    SCHIZO_PCIAFSR_STTO);

        upa_writeq(err_mask, pbm->pbm_regs + SCHIZO_PCI_AFSR);

        err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SNOOP_GR |
                    BUS_ERROR_SNOOP_PCI | BUS_ERROR_SNOOP_RD |
                    BUS_ERROR_SNOOP_RDS | BUS_ERROR_SNOOP_RDSA |
                    BUS_ERROR_SNOOP_OWN | BUS_ERROR_SNOOP_RDO |
                    BUS_ERROR_WDATA_PERR | BUS_ERROR_CTRL_PERR |
                    BUS_ERROR_SNOOP_ERR | BUS_ERROR_JBUS_ILL_B |
                    BUS_ERROR_JBUS_ILL_C | BUS_ERROR_RD_PERR |
                    BUS_ERROR_APERR | BUS_ERROR_UNMAP |
                    BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT);

        upa_writeq((SCHIZO_SAFERRCTRL_EN | err_mask),
                   pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL);

        upa_writeq((SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)),
                   pbm->controller_regs + SCHIZO_SAFARI_IRQCTRL);
}

static void schizo_register_error_handlers(struct pci_pbm_info *pbm)
{
        struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
        u64 tmp, err_mask, err_no_mask;
        int err;

        /* Schizo IRQ property layout is:
         * 0: PCIERR
         * 1: UE ERR
         * 2: CE ERR
         * 3: SERR
         * 4: POWER FAIL?
         */

        if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) {
                err = request_irq(op->archdata.irqs[1], schizo_ue_intr, 0,
                                  "SCHIZO_UE", pbm);
                if (err)
                        printk(KERN_WARNING "%s: Could not register UE, "
                               "err=%d\n", pbm->name, err);
        }
        if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) {
                err = request_irq(op->archdata.irqs[2], schizo_ce_intr, 0,
                                  "SCHIZO_CE", pbm);
                if (err)
                        printk(KERN_WARNING "%s: Could not register CE, "
                               "err=%d\n", pbm->name, err);
        }
        err = 0;
        if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) {
                err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
                                  "SCHIZO_PCIERR", pbm);
        } else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) {
                err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
                                  "SCHIZO_PCIERR", pbm);
        }
        if (err)
                printk(KERN_WARNING "%s: Could not register PCIERR, "
                       "err=%d\n", pbm->name, err);

        if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) {
                err = request_irq(op->archdata.irqs[3], schizo_safarierr_intr, 0,
                                  "SCHIZO_SERR", pbm);
                if (err)
                        printk(KERN_WARNING "%s: Could not register SERR, "
                               "err=%d\n", pbm->name, err);
        }

        /* Enable UE and CE interrupts for controller. */
        upa_writeq((SCHIZO_ECCCTRL_EE |
                    SCHIZO_ECCCTRL_UE |
                    SCHIZO_ECCCTRL_CE), pbm->controller_regs + SCHIZO_ECC_CTRL);

        err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
                    SCHIZO_PCICTRL_ESLCK |
                    SCHIZO_PCICTRL_TTO_ERR |
                    SCHIZO_PCICTRL_RTRY_ERR |
                    SCHIZO_PCICTRL_SBH_ERR |
                    SCHIZO_PCICTRL_SERR |

                    SCHIZO_PCICTRL_EEN);

        err_no_mask = (SCHIZO_PCICTRL_DTO_ERR |
                       SCHIZO_PCICTRL_SBH_INT);

        /* Enable PCI Error interrupts and clear error
         * bits for each PBM.
         */
        tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL);
        tmp |= err_mask;
        tmp &= ~err_no_mask;
        upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL);

        upa_writeq((SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
                    SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
                    SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
                    SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
                    SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
                    SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS),
                   pbm->pbm_regs + SCHIZO_PCI_AFSR);

        /* Make all Safari error conditions fatal except unmapped
         * errors which we make generate interrupts.
         */
        err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SSMDIS |
                    BUS_ERROR_BADMA | BUS_ERROR_BADMB |
                    BUS_ERROR_BADMC |
                    BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
                    BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB |
                    BUS_ERROR_CIQTO |
                    BUS_ERROR_LPQTO | BUS_ERROR_SFPQTO |
                    BUS_ERROR_UFPQTO | BUS_ERROR_APERR |
                    BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT |
                    BUS_ERROR_ILL);
#if 1
        /* XXX Something wrong with some Excalibur systems
         * XXX Sun is shipping.  The behavior on a 2-cpu
         * XXX machine is that both CPU1 parity error bits
         * XXX are set and are immediately set again when
         * XXX their error status bits are cleared.  Just
         * XXX ignore them for now.  -DaveM
         */
        err_mask &= ~(BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
                      BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB);
#endif

        upa_writeq((SCHIZO_SAFERRCTRL_EN | err_mask),
                   pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL);
}

static void pbm_config_busmastering(struct pci_pbm_info *pbm)
{
        u8 *addr;

        /* Set cache-line size to 64 bytes, this is actually
         * a nop but I do it for completeness.
         */
        addr = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
                                        0, PCI_CACHE_LINE_SIZE);
        pci_config_write8(addr, 64 / sizeof(u32));

        /* Set PBM latency timer to 64 PCI clocks. */
        addr = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
                                        0, PCI_LATENCY_TIMER);
        pci_config_write8(addr, 64);
}

static void schizo_scan_bus(struct pci_pbm_info *pbm, struct device *parent)
{
        pbm_config_busmastering(pbm);
        pbm->is_66mhz_capable =
                (of_find_property(pbm->op->dev.of_node, "66mhz-capable", NULL)
                 != NULL);

        pbm->pci_bus = pci_scan_one_pbm(pbm, parent);

        if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
                tomatillo_register_error_handlers(pbm);
        else
                schizo_register_error_handlers(pbm);
}

#define SCHIZO_STRBUF_CONTROL           (0x02800UL)
#define SCHIZO_STRBUF_FLUSH             (0x02808UL)
#define SCHIZO_STRBUF_FSYNC             (0x02810UL)
#define SCHIZO_STRBUF_CTXFLUSH          (0x02818UL)
#define SCHIZO_STRBUF_CTXMATCH          (0x10000UL)

static void schizo_pbm_strbuf_init(struct pci_pbm_info *pbm)
{
        unsigned long base = pbm->pbm_regs;
        u64 control;

        if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
                /* TOMATILLO lacks streaming cache.  */
                return;
        }

        /* SCHIZO has context flushing. */
        pbm->stc.strbuf_control         = base + SCHIZO_STRBUF_CONTROL;
        pbm->stc.strbuf_pflush          = base + SCHIZO_STRBUF_FLUSH;
        pbm->stc.strbuf_fsync           = base + SCHIZO_STRBUF_FSYNC;
        pbm->stc.strbuf_ctxflush        = base + SCHIZO_STRBUF_CTXFLUSH;
        pbm->stc.strbuf_ctxmatch_base   = base + SCHIZO_STRBUF_CTXMATCH;

        pbm->stc.strbuf_flushflag = (volatile unsigned long *)
                ((((unsigned long)&pbm->stc.__flushflag_buf[0])
                  + 63UL)
                 & ~63UL);
        pbm->stc.strbuf_flushflag_pa = (unsigned long)
                __pa(pbm->stc.strbuf_flushflag);

        /* Turn off LRU locking and diag mode, enable the
         * streaming buffer and leave the rerun-disable
         * setting however OBP set it.
         */
        control = upa_readq(pbm->stc.strbuf_control);
        control &= ~(SCHIZO_STRBUF_CTRL_LPTR |
                     SCHIZO_STRBUF_CTRL_LENAB |
                     SCHIZO_STRBUF_CTRL_DENAB);
        control |= SCHIZO_STRBUF_CTRL_ENAB;
        upa_writeq(control, pbm->stc.strbuf_control);

        pbm->stc.strbuf_enabled = 1;
}

#define SCHIZO_IOMMU_CONTROL            (0x00200UL)
#define SCHIZO_IOMMU_TSBBASE            (0x00208UL)
#define SCHIZO_IOMMU_FLUSH              (0x00210UL)
#define SCHIZO_IOMMU_CTXFLUSH           (0x00218UL)

static int schizo_pbm_iommu_init(struct pci_pbm_info *pbm)
{
        static const u32 vdma_default[] = { 0xc0000000, 0x40000000 };
        unsigned long i, tagbase, database;
        struct iommu *iommu = pbm->iommu;
        int tsbsize, err;
        const u32 *vdma;
        u32 dma_mask;
        u64 control;

        vdma = of_get_property(pbm->op->dev.of_node, "virtual-dma", NULL);
        if (!vdma)
                vdma = vdma_default;

        dma_mask = vdma[0];
        switch (vdma[1]) {
                case 0x20000000:
                        dma_mask |= 0x1fffffff;
                        tsbsize = 64;
                        break;

                case 0x40000000:
                        dma_mask |= 0x3fffffff;
                        tsbsize = 128;
                        break;

                case 0x80000000:
                        dma_mask |= 0x7fffffff;
                        tsbsize = 128;
                        break;

                default:
                        printk(KERN_ERR PFX "Strange virtual-dma size.\n");
                        return -EINVAL;
        }

        /* Register addresses, SCHIZO has iommu ctx flushing. */
        iommu->iommu_control  = pbm->pbm_regs + SCHIZO_IOMMU_CONTROL;
        iommu->iommu_tsbbase  = pbm->pbm_regs + SCHIZO_IOMMU_TSBBASE;
        iommu->iommu_flush    = pbm->pbm_regs + SCHIZO_IOMMU_FLUSH;
        iommu->iommu_tags     = iommu->iommu_flush + (0xa580UL - 0x0210UL);
        iommu->iommu_ctxflush = pbm->pbm_regs + SCHIZO_IOMMU_CTXFLUSH;

        /* We use the main control/status register of SCHIZO as the write
         * completion register.
         */
        iommu->write_complete_reg = pbm->controller_regs + 0x10000UL;

        /*
         * Invalidate TLB Entries.
         */
        control = upa_readq(iommu->iommu_control);
        control |= SCHIZO_IOMMU_CTRL_DENAB;
        upa_writeq(control, iommu->iommu_control);

        tagbase = SCHIZO_IOMMU_TAG, database = SCHIZO_IOMMU_DATA;

        for (i = 0; i < 16; i++) {
                upa_writeq(0, pbm->pbm_regs + tagbase + (i * 8UL));
                upa_writeq(0, pbm->pbm_regs + database + (i * 8UL));
        }

        /* Leave diag mode enabled for full-flushing done
         * in pci_iommu.c
         */
        err = iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask,
                               pbm->numa_node);
        if (err) {
                printk(KERN_ERR PFX "iommu_table_init() fails with %d\n", err);
                return err;
        }

        upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);

        control = upa_readq(iommu->iommu_control);
        control &= ~(SCHIZO_IOMMU_CTRL_TSBSZ | SCHIZO_IOMMU_CTRL_TBWSZ);
        switch (tsbsize) {
        case 64:
                control |= SCHIZO_IOMMU_TSBSZ_64K;
                break;
        case 128:
                control |= SCHIZO_IOMMU_TSBSZ_128K;
                break;
        }

        control |= SCHIZO_IOMMU_CTRL_ENAB;
        upa_writeq(control, iommu->iommu_control);

        return 0;
}

#define SCHIZO_PCI_IRQ_RETRY    (0x1a00UL)
#define  SCHIZO_IRQ_RETRY_INF    0xffUL

#define SCHIZO_PCI_DIAG                 (0x2020UL)
#define  SCHIZO_PCIDIAG_D_BADECC        (1UL << 10UL) /* Disable BAD ECC errors (Schizo) */
#define  SCHIZO_PCIDIAG_D_BYPASS        (1UL <<  9UL) /* Disable MMU bypass mode (Schizo/Tomatillo) */
#define  SCHIZO_PCIDIAG_D_TTO           (1UL <<  8UL) /* Disable TTO errors (Schizo/Tomatillo) */
#define  SCHIZO_PCIDIAG_D_RTRYARB       (1UL <<  7UL) /* Disable retry arbitration (Schizo) */
#define  SCHIZO_PCIDIAG_D_RETRY         (1UL <<  6UL) /* Disable retry limit (Schizo/Tomatillo) */
#define  SCHIZO_PCIDIAG_D_INTSYNC       (1UL <<  5UL) /* Disable interrupt/DMA synch (Schizo/Tomatillo) */
#define  SCHIZO_PCIDIAG_I_DMA_PARITY    (1UL <<  3UL) /* Invert DMA parity (Schizo/Tomatillo) */
#define  SCHIZO_PCIDIAG_I_PIOD_PARITY   (1UL <<  2UL) /* Invert PIO data parity (Schizo/Tomatillo) */
#define  SCHIZO_PCIDIAG_I_PIOA_PARITY   (1UL <<  1UL) /* Invert PIO address parity (Schizo/Tomatillo) */

#define TOMATILLO_PCI_IOC_CSR           (0x2248UL)
#define TOMATILLO_IOC_PART_WPENAB       0x0000000000080000UL
#define TOMATILLO_IOC_RDMULT_PENAB      0x0000000000040000UL
#define TOMATILLO_IOC_RDONE_PENAB       0x0000000000020000UL
#define TOMATILLO_IOC_RDLINE_PENAB      0x0000000000010000UL
#define TOMATILLO_IOC_RDMULT_PLEN       0x000000000000c000UL
#define TOMATILLO_IOC_RDMULT_PLEN_SHIFT 14UL
#define TOMATILLO_IOC_RDONE_PLEN        0x0000000000003000UL
#define TOMATILLO_IOC_RDONE_PLEN_SHIFT  12UL
#define TOMATILLO_IOC_RDLINE_PLEN       0x0000000000000c00UL
#define TOMATILLO_IOC_RDLINE_PLEN_SHIFT 10UL
#define TOMATILLO_IOC_PREF_OFF          0x00000000000003f8UL
#define TOMATILLO_IOC_PREF_OFF_SHIFT    3UL
#define TOMATILLO_IOC_RDMULT_CPENAB     0x0000000000000004UL
#define TOMATILLO_IOC_RDONE_CPENAB      0x0000000000000002UL
#define TOMATILLO_IOC_RDLINE_CPENAB     0x0000000000000001UL

#define TOMATILLO_PCI_IOC_TDIAG         (0x2250UL)
#define TOMATILLO_PCI_IOC_DDIAG         (0x2290UL)

static void schizo_pbm_hw_init(struct pci_pbm_info *pbm)
{
        u64 tmp;

        upa_writeq(5, pbm->pbm_regs + SCHIZO_PCI_IRQ_RETRY);

        tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL);

        /* Enable arbiter for all PCI slots.  */
        tmp |= 0xff;

        if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
            pbm->chip_version >= 0x2)
                tmp |= 0x3UL << SCHIZO_PCICTRL_PTO_SHIFT;

        if (!of_find_property(pbm->op->dev.of_node, "no-bus-parking", NULL))
                tmp |= SCHIZO_PCICTRL_PARK;
        else
                tmp &= ~SCHIZO_PCICTRL_PARK;

        if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
            pbm->chip_version <= 0x1)
                tmp |= SCHIZO_PCICTRL_DTO_INT;
        else
                tmp &= ~SCHIZO_PCICTRL_DTO_INT;

        if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
                tmp |= (SCHIZO_PCICTRL_MRM_PREF |
                        SCHIZO_PCICTRL_RDO_PREF |
                        SCHIZO_PCICTRL_RDL_PREF);

        upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL);

        tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_DIAG);
        tmp &= ~(SCHIZO_PCIDIAG_D_RTRYARB |
                 SCHIZO_PCIDIAG_D_RETRY |
                 SCHIZO_PCIDIAG_D_INTSYNC);
        upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_DIAG);

        if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
                /* Clear prefetch lengths to workaround a bug in
                 * Jalapeno...
                 */
                tmp = (TOMATILLO_IOC_PART_WPENAB |
                       (1 << TOMATILLO_IOC_PREF_OFF_SHIFT) |
                       TOMATILLO_IOC_RDMULT_CPENAB |
                       TOMATILLO_IOC_RDONE_CPENAB |
                       TOMATILLO_IOC_RDLINE_CPENAB);

                upa_writeq(tmp, pbm->pbm_regs + TOMATILLO_PCI_IOC_CSR);
        }
}

static int schizo_pbm_init(struct pci_pbm_info *pbm,
                           struct platform_device *op, u32 portid,
                           int chip_type)
{
        const struct linux_prom64_registers *regs;
        struct device_node *dp = op->dev.of_node;
        const char *chipset_name;
        int err;

        switch (chip_type) {
        case PBM_CHIP_TYPE_TOMATILLO:
                chipset_name = "TOMATILLO";
                break;

        case PBM_CHIP_TYPE_SCHIZO_PLUS:
                chipset_name = "SCHIZO+";
                break;

        case PBM_CHIP_TYPE_SCHIZO:
        default:
                chipset_name = "SCHIZO";
                break;
        }

        /* For SCHIZO, three OBP regs:
         * 1) PBM controller regs
         * 2) Schizo front-end controller regs (same for both PBMs)
         * 3) PBM PCI config space
         *
         * For TOMATILLO, four OBP regs:
         * 1) PBM controller regs
         * 2) Tomatillo front-end controller regs
         * 3) PBM PCI config space
         * 4) Ichip regs
         */
        regs = of_get_property(dp, "reg", NULL);

        pbm->next = pci_pbm_root;
        pci_pbm_root = pbm;

        pbm->numa_node = -1;

        pbm->pci_ops = &sun4u_pci_ops;
        pbm->config_space_reg_bits = 8;

        pbm->index = pci_num_pbms++;

        pbm->portid = portid;
        pbm->op = op;

        pbm->chip_type = chip_type;
        pbm->chip_version = of_getintprop_default(dp, "version#", 0);
        pbm->chip_revision = of_getintprop_default(dp, "module-version#", 0);

        pbm->pbm_regs = regs[0].phys_addr;
        pbm->controller_regs = regs[1].phys_addr - 0x10000UL;

        if (chip_type == PBM_CHIP_TYPE_TOMATILLO)
                pbm->sync_reg = regs[3].phys_addr + 0x1a18UL;

        pbm->name = dp->full_name;

        printk("%s: %s PCI Bus Module ver[%x:%x]\n",
               pbm->name, chipset_name,
               pbm->chip_version, pbm->chip_revision);

        schizo_pbm_hw_init(pbm);

        pci_determine_mem_io_space(pbm);

        pci_get_pbm_props(pbm);

        err = schizo_pbm_iommu_init(pbm);
        if (err)
                return err;

        schizo_pbm_strbuf_init(pbm);

        schizo_scan_bus(pbm, &op->dev);

        return 0;
}

static inline int portid_compare(u32 x, u32 y, int chip_type)
{
        if (chip_type == PBM_CHIP_TYPE_TOMATILLO) {
                if (x == (y ^ 1))
                        return 1;
                return 0;
        }
        return (x == y);
}

static struct pci_pbm_info *schizo_find_sibling(u32 portid, int chip_type)
{
        struct pci_pbm_info *pbm;

        for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
                if (portid_compare(pbm->portid, portid, chip_type))
                        return pbm;
        }
        return NULL;
}

static int __schizo_init(struct platform_device *op, unsigned long chip_type)
{
        struct device_node *dp = op->dev.of_node;
        struct pci_pbm_info *pbm;
        struct iommu *iommu;
        u32 portid;
        int err;

        portid = of_getintprop_default(dp, "portid", 0xff);

        err = -ENOMEM;
        pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
        if (!pbm) {
                printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
                goto out_err;
        }

        pbm->sibling = schizo_find_sibling(portid, chip_type);

        iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
        if (!iommu) {
                printk(KERN_ERR PFX "Cannot allocate PBM A iommu.\n");
                goto out_free_pbm;
        }

        pbm->iommu = iommu;

        if (schizo_pbm_init(pbm, op, portid, chip_type))
                goto out_free_iommu;

        if (pbm->sibling)
                pbm->sibling->sibling = pbm;

        dev_set_drvdata(&op->dev, pbm);

        return 0;

out_free_iommu:
        kfree(pbm->iommu);

out_free_pbm:
        kfree(pbm);

out_err:
        return err;
}

static const struct of_device_id schizo_match[];
static int schizo_probe(struct platform_device *op)
{
        const struct of_device_id *match;

        match = of_match_device(schizo_match, &op->dev);
        if (!match)
                return -EINVAL;
        return __schizo_init(op, (unsigned long)match->data);
}

/* The ordering of this table is very important.  Some Tomatillo
 * nodes announce that they are compatible with both pci108e,a801
 * and pci108e,8001.  So list the chips in reverse chronological
 * order.
 */
static const struct of_device_id schizo_match[] = {
        {
                .name = "pci",
                .compatible = "pci108e,a801",
                .data = (void *) PBM_CHIP_TYPE_TOMATILLO,
        },
        {
                .name = "pci",
                .compatible = "pci108e,8002",
                .data = (void *) PBM_CHIP_TYPE_SCHIZO_PLUS,
        },
        {
                .name = "pci",
                .compatible = "pci108e,8001",
                .data = (void *) PBM_CHIP_TYPE_SCHIZO,
        },
        {},
};

static struct platform_driver schizo_driver = {
        .driver = {
                .name = DRIVER_NAME,
                .of_match_table = schizo_match,
        },
        .probe          = schizo_probe,
};

static int __init schizo_init(void)
{
        return platform_driver_register(&schizo_driver);
}

subsys_initcall(schizo_init);