diff options
Diffstat (limited to 'sys/dev/pci/psp_pci.c')
| -rw-r--r-- | sys/dev/pci/psp_pci.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/sys/dev/pci/psp_pci.c b/sys/dev/pci/psp_pci.c new file mode 100644 index 00000000000..e1356ceeb8a --- /dev/null +++ b/sys/dev/pci/psp_pci.c @@ -0,0 +1,126 @@ +/* $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; + } +} |