/*      $OpenBSD: psp_pci.c,v 1.3 2026/02/12 14:24:53 hshoexer Exp $    */

/*
 * Copyright (c) 2023-2024 Hans-Joerg Hoexer <hshoexer@genua.de>
 * Copyright (c) 2024 Alexander Bluhm <bluhm@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

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

#include <machine/bus.h>

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

#include <dev/ic/ccpvar.h>
#include <dev/ic/pspvar.h>

static const struct pci_matchid psp_pci_devices[] = {
        { PCI_VENDOR_AMD,       PCI_PRODUCT_AMD_17_CCP_1 },
        { PCI_VENDOR_AMD,       PCI_PRODUCT_AMD_17_3X_CCP },
        { PCI_VENDOR_AMD,       PCI_PRODUCT_AMD_19_1X_PSP },
        { PCI_VENDOR_AMD,       PCI_PRODUCT_AMD_1A_PSP },
};

int
psp_pci_match(struct ccp_softc *sc, struct pci_attach_args *pa)
{
        bus_size_t reg_capabilities;
        uint32_t capabilities;

        if (!pci_matchbyid(pa, psp_pci_devices, nitems(psp_pci_devices)))
                return (0);

        if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_17_CCP_1)
                reg_capabilities = PSPV1_REG_CAPABILITIES;
        else
                reg_capabilities = PSP_REG_CAPABILITIES;
        capabilities = bus_space_read_4(sc->sc_iot, sc->sc_ioh,
            reg_capabilities);
        if (!ISSET(capabilities, PSP_CAP_SEV))
                return (0);

        return (1);
}

void
psp_pci_intr_map(struct ccp_softc *sc, struct pci_attach_args *pa)
{
        pci_intr_handle_t ih;
        const char *intrstr = NULL;
        bus_size_t reg_inten, reg_intsts;

        /* clear and disable interrupts */
        if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_17_CCP_1) {
                reg_inten = PSPV1_REG_INTEN;
                reg_intsts = PSPV1_REG_INTSTS;
        } else if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_1A_PSP) {
                reg_inten = PSPV6_REG_INTEN;
                reg_intsts = PSPV6_REG_INTSTS;
        } else {
                reg_inten = PSP_REG_INTEN;
                reg_intsts = PSP_REG_INTSTS;
        }
        bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg_inten, 0);
        bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg_intsts, -1);

        if (pci_intr_map_msix(pa, 0, &ih) != 0 &&
            pci_intr_map_msi(pa, &ih) != 0 && pci_intr_map(pa, &ih) != 0) {
                printf(": couldn't map interrupt\n");
                return;
        }

        intrstr = pci_intr_string(pa->pa_pc, ih);
        sc->sc_irqh = pci_intr_establish(pa->pa_pc, ih, IPL_BIO | IPL_MPSAFE,
            psp_sev_intr, sc, sc->sc_dev.dv_xname);
        if (sc->sc_irqh != NULL)
                printf(": %s", intrstr);
}

void
psp_pci_attach(struct ccp_softc *sc, struct pci_attach_args *pa)
{
        struct psp_attach_args arg;
        struct device *self = (struct device *)sc;
        bus_size_t reg_capabilities;

        memset(&arg, 0, sizeof(arg));
        arg.iot = sc->sc_iot;
        arg.ioh = sc->sc_ioh;
        arg.dmat = pa->pa_dmat;
        switch (PCI_PRODUCT(pa->pa_id)) {
        case PCI_PRODUCT_AMD_17_CCP_1:
                arg.version = 1;
                reg_capabilities = PSPV1_REG_CAPABILITIES;
                break;
        case PCI_PRODUCT_AMD_17_3X_CCP:
                arg.version = 2;
                reg_capabilities = PSP_REG_CAPABILITIES;
                break;
        case PCI_PRODUCT_AMD_19_1X_PSP:
                arg.version = 4;
                reg_capabilities = PSP_REG_CAPABILITIES;
                break;
        case PCI_PRODUCT_AMD_1A_PSP:
                arg.version = 6;
                reg_capabilities = PSPV6_REG_CAPABILITIES;
                break;
        default:
                reg_capabilities = PSP_REG_CAPABILITIES;
                break;
        }
        arg.capabilities = bus_space_read_4(sc->sc_iot, sc->sc_ioh,
            reg_capabilities);

        sc->sc_psp = config_found_sm(self, &arg, pspprint, pspsubmatch);
        if (sc->sc_psp == NULL) {
                pci_intr_disestablish(pa->pa_pc, sc->sc_irqh);
                return;
        }
}