1 /* 2 * IPMI ACPI firmware handling 3 * 4 * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "hw/ipmi/ipmi.h" 12 #include "hw/acpi/aml-build.h" 13 #include "hw/acpi/acpi.h" 14 #include "hw/acpi/ipmi.h" 15 16 static Aml *aml_ipmi_crs(IPMIFwInfo *info, const char *resource) 17 { 18 Aml *crs = aml_resource_template(); 19 20 /* 21 * The base address is fixed and cannot change. That may be different 22 * if someone does PCI, but we aren't there yet. 23 */ 24 switch (info->memspace) { 25 case IPMI_MEMSPACE_IO: 26 aml_append(crs, aml_io(AML_DECODE16, info->base_address, 27 info->base_address + info->register_length - 1, 28 info->register_spacing, info->register_length)); 29 break; 30 case IPMI_MEMSPACE_MEM32: 31 aml_append(crs, 32 aml_dword_memory(AML_POS_DECODE, 33 AML_MIN_FIXED, AML_MAX_FIXED, 34 AML_NON_CACHEABLE, AML_READ_WRITE, 35 0xffffffff, 36 info->base_address, 37 info->base_address + info->register_length - 1, 38 info->register_spacing, info->register_length)); 39 break; 40 case IPMI_MEMSPACE_MEM64: 41 aml_append(crs, 42 aml_qword_memory(AML_POS_DECODE, 43 AML_MIN_FIXED, AML_MAX_FIXED, 44 AML_NON_CACHEABLE, AML_READ_WRITE, 45 0xffffffffffffffffULL, 46 info->base_address, 47 info->base_address + info->register_length - 1, 48 info->register_spacing, info->register_length)); 49 break; 50 case IPMI_MEMSPACE_SMBUS: 51 aml_append(crs, aml_i2c_serial_bus_device(info->base_address, 52 resource)); 53 break; 54 default: 55 abort(); 56 } 57 58 if (info->interrupt_number) { 59 aml_append(crs, aml_irq_no_flags(info->interrupt_number)); 60 } 61 62 return crs; 63 } 64 65 static Aml *aml_ipmi_device(IPMIFwInfo *info, const char *resource) 66 { 67 Aml *dev; 68 uint16_t version = ((info->ipmi_spec_major_revision << 8) 69 | (info->ipmi_spec_minor_revision << 4)); 70 71 assert(info->ipmi_spec_minor_revision <= 15); 72 73 dev = aml_device("MI%d", info->uuid); 74 aml_append(dev, aml_name_decl("_HID", aml_eisaid("IPI0001"))); 75 aml_append(dev, aml_name_decl("_STR", aml_string("ipmi_%s", 76 info->interface_name))); 77 aml_append(dev, aml_name_decl("_UID", aml_int(info->uuid))); 78 aml_append(dev, aml_name_decl("_CRS", aml_ipmi_crs(info, resource))); 79 aml_append(dev, aml_name_decl("_IFT", aml_int(info->interface_type))); 80 aml_append(dev, aml_name_decl("_SRV", aml_int(version))); 81 82 return dev; 83 } 84 85 void build_acpi_ipmi_devices(Aml *scope, BusState *bus, const char *resource) 86 { 87 88 BusChild *kid; 89 90 QTAILQ_FOREACH(kid, &bus->children, sibling) { 91 IPMIInterface *ii; 92 IPMIInterfaceClass *iic; 93 IPMIFwInfo info; 94 Object *obj = object_dynamic_cast(OBJECT(kid->child), 95 TYPE_IPMI_INTERFACE); 96 97 if (!obj) { 98 continue; 99 } 100 101 ii = IPMI_INTERFACE(obj); 102 iic = IPMI_INTERFACE_GET_CLASS(obj); 103 memset(&info, 0, sizeof(info)); 104 iic->get_fwinfo(ii, &info); 105 aml_append(scope, aml_ipmi_device(&info, resource)); 106 } 107 } 108