1/* $NetBSD: acpi_pci_graviton.c,v 1.5 2022/10/15 11:07:38 jmcneill Exp $ */ 2 3/*- 4 * Copyright (c) 2018, 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill@invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: acpi_pci_graviton.c,v 1.5 2022/10/15 11:07:38 jmcneill Exp $"); 34 35#include <sys/param.h> 36#include <sys/bus.h> 37#include <sys/device.h> 38#include <sys/intr.h> 39#include <sys/systm.h> 40#include <sys/kernel.h> 41#include <sys/kmem.h> 42#include <sys/cpu.h> 43 44#include <dev/pci/pcireg.h> 45#include <dev/pci/pcivar.h> 46#include <dev/pci/pciconf.h> 47 48#include <dev/acpi/acpivar.h> 49#include <dev/acpi/acpi_pci.h> 50#include <dev/acpi/acpi_mcfg.h> 51 52#include <arm/acpi/acpi_pci_machdep.h> 53 54static int 55acpi_pci_graviton_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t *data) 56{ 57 struct acpi_pci_context *ap = pc->pc_conf_v; 58 int b, d, f; 59 60 pci_decompose_tag(pc, tag, &b, &d, &f); 61 62 if (ap->ap_bus == b) { 63 if (d > 0 || f > 0) { 64 *data = -1; 65 return EINVAL; 66 } 67 *data = bus_space_read_4(ap->ap_bst, ap->ap_conf_bsh, reg); 68 return 0; 69 } 70 71 return acpimcfg_conf_read(pc, tag, reg, data); 72} 73 74static int 75acpi_pci_graviton_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) 76{ 77 struct acpi_pci_context *ap = pc->pc_conf_v; 78 int b, d, f; 79 80 pci_decompose_tag(pc, tag, &b, &d, &f); 81 82 if (ap->ap_bus == b) { 83 if (d > 0 || f > 0) { 84 return EINVAL; 85 } 86 bus_space_write_4(ap->ap_bst, ap->ap_conf_bsh, reg, data); 87 return 0; 88 } 89 90 return acpimcfg_conf_write(pc, tag, reg, data); 91} 92 93static ACPI_STATUS 94acpi_pci_graviton_map(ACPI_HANDLE handle, UINT32 level, void *ctx, void **retval) 95{ 96 struct acpi_pci_context *ap = ctx; 97 struct acpi_resources res; 98 struct acpi_mem *mem; 99 ACPI_HANDLE parent; 100 ACPI_INTEGER seg; 101 ACPI_STATUS rv; 102 int error; 103 104 rv = AcpiGetParent(handle, &parent); 105 if (ACPI_FAILURE(rv)) 106 return rv; 107 rv = acpi_eval_integer(parent, "_SEG", &seg); 108 if (ACPI_FAILURE(rv)) 109 seg = 0; 110 if (ap->ap_seg != seg) 111 return AE_OK; 112 113 rv = acpi_resource_parse(ap->ap_dev, handle, "_CRS", &res, &acpi_resource_parse_ops_quiet); 114 if (ACPI_FAILURE(rv)) 115 return rv; 116 117 mem = acpi_res_mem(&res, 0); 118 if (mem == NULL) { 119 acpi_resource_cleanup(&res); 120 return AE_NOT_FOUND; 121 } 122 123 error = bus_space_map(ap->ap_bst, mem->ar_base, mem->ar_length, 124 BUS_SPACE_MAP_NONPOSTED, &ap->ap_conf_bsh); 125 if (error != 0) 126 return AE_NO_MEMORY; 127 128 ap->ap_conf_read = acpi_pci_graviton_conf_read; 129 ap->ap_conf_write = acpi_pci_graviton_conf_write; 130 131 return AE_CTRL_TERMINATE; 132} 133 134void 135acpi_pci_graviton_init(struct acpi_pci_context *ap) 136{ 137 ACPI_STATUS rv; 138 139 rv = AcpiGetDevices(__UNCONST("AMZN0001"), acpi_pci_graviton_map, ap, NULL); 140 if (ACPI_FAILURE(rv)) 141 return; 142} 143