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/* $OpenBSD: psp_pci.c,v 1.1 2024/10/24 18:52:59 bluhm 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 },
};
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 {
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, 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;
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;
}
}
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