1 /* $OpenBSD: psp_pci.c,v 1.2 2024/11/08 17:34:22 bluhm Exp $ */ 2 3 /* 4 * Copyright (c) 2023-2024 Hans-Joerg Hoexer <hshoexer@genua.de> 5 * Copyright (c) 2024 Alexander Bluhm <bluhm@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/param.h> 21 #include <sys/systm.h> 22 #include <sys/device.h> 23 24 #include <machine/bus.h> 25 26 #include <dev/pci/pcidevs.h> 27 #include <dev/pci/pcivar.h> 28 29 #include <dev/ic/ccpvar.h> 30 #include <dev/ic/pspvar.h> 31 32 static const struct pci_matchid psp_pci_devices[] = { 33 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_17_CCP_1 }, 34 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_17_3X_CCP }, 35 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_19_1X_PSP }, 36 }; 37 38 int 39 psp_pci_match(struct ccp_softc *sc, struct pci_attach_args *pa) 40 { 41 bus_size_t reg_capabilities; 42 uint32_t capabilities; 43 44 if (!pci_matchbyid(pa, psp_pci_devices, nitems(psp_pci_devices))) 45 return (0); 46 47 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_17_CCP_1) 48 reg_capabilities = PSPV1_REG_CAPABILITIES; 49 else 50 reg_capabilities = PSP_REG_CAPABILITIES; 51 capabilities = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 52 reg_capabilities); 53 if (!ISSET(capabilities, PSP_CAP_SEV)) 54 return (0); 55 56 return (1); 57 } 58 59 void 60 psp_pci_intr_map(struct ccp_softc *sc, struct pci_attach_args *pa) 61 { 62 pci_intr_handle_t ih; 63 const char *intrstr = NULL; 64 bus_size_t reg_inten, reg_intsts; 65 66 /* clear and disable interrupts */ 67 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_17_CCP_1) { 68 reg_inten = PSPV1_REG_INTEN; 69 reg_intsts = PSPV1_REG_INTSTS; 70 } else { 71 reg_inten = PSP_REG_INTEN; 72 reg_intsts = PSP_REG_INTSTS; 73 } 74 bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg_inten, 0); 75 bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg_intsts, -1); 76 77 if (pci_intr_map_msix(pa, 0, &ih) != 0 && 78 pci_intr_map_msi(pa, &ih) != 0 && pci_intr_map(pa, &ih) != 0) { 79 printf(": couldn't map interrupt\n"); 80 return; 81 } 82 83 intrstr = pci_intr_string(pa->pa_pc, ih); 84 sc->sc_irqh = pci_intr_establish(pa->pa_pc, ih, IPL_BIO | IPL_MPSAFE, 85 psp_sev_intr, sc, sc->sc_dev.dv_xname); 86 if (sc->sc_irqh != NULL) 87 printf(": %s", intrstr); 88 } 89 90 void 91 psp_pci_attach(struct ccp_softc *sc, struct pci_attach_args *pa) 92 { 93 struct psp_attach_args arg; 94 struct device *self = (struct device *)sc; 95 bus_size_t reg_capabilities; 96 97 memset(&arg, 0, sizeof(arg)); 98 arg.iot = sc->sc_iot; 99 arg.ioh = sc->sc_ioh; 100 arg.dmat = pa->pa_dmat; 101 switch (PCI_PRODUCT(pa->pa_id)) { 102 case PCI_PRODUCT_AMD_17_CCP_1: 103 arg.version = 1; 104 reg_capabilities = PSPV1_REG_CAPABILITIES; 105 break; 106 case PCI_PRODUCT_AMD_17_3X_CCP: 107 arg.version = 2; 108 reg_capabilities = PSP_REG_CAPABILITIES; 109 break; 110 case PCI_PRODUCT_AMD_19_1X_PSP: 111 arg.version = 4; 112 reg_capabilities = PSP_REG_CAPABILITIES; 113 break; 114 default: 115 reg_capabilities = PSP_REG_CAPABILITIES; 116 break; 117 } 118 arg.capabilities = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 119 reg_capabilities); 120 121 sc->sc_psp = config_found_sm(self, &arg, pspprint, pspsubmatch); 122 if (sc->sc_psp == NULL) { 123 pci_intr_disestablish(pa->pa_pc, sc->sc_irqh); 124 return; 125 } 126 } 127