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https://git.proxmox.com/git/fwupd
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67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* Copyright (C) 2020 Richard Hughes <richard@hughsie.com>
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* Copyright (C) 2022 Mario Limonciello <mario.limonciello@amd.com>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include "config.h"
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#include "fu-acpi-ivrs.h"
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struct _FuAcpiIvrs {
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FuAcpiTable parent_instance;
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gboolean remap_support;
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};
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G_DEFINE_TYPE(FuAcpiIvrs, fu_acpi_ivrs, FU_TYPE_ACPI_TABLE)
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/* IVINfo field */
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#define IVRS_DMA_REMAP_SUPPORT_FLAG 0x2
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FuAcpiIvrs *
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fu_acpi_ivrs_new(GBytes *blob, GError **error)
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{
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FuAcpiIvrs *self = g_object_new(FU_TYPE_ACPI_IVRS, NULL);
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gsize bufsz = 0;
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guint8 ivinfo = 0;
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const guint8 *buf = g_bytes_get_data(blob, &bufsz);
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/* FuAcpiTable->parse */
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if (!FU_FIRMWARE_CLASS(fu_acpi_ivrs_parent_class)
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->parse(FU_FIRMWARE(self), blob, 0x0, FWUPD_INSTALL_FLAG_NONE, error))
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return NULL;
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/* check signature and read flags */
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if (g_strcmp0(fu_firmware_get_id(FU_FIRMWARE(self)), "IVRS") != 0) {
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g_set_error(error,
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G_IO_ERROR,
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G_IO_ERROR_NOT_SUPPORTED,
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"Not a IVRS table, got %s",
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fu_firmware_get_id(FU_FIRMWARE(self)));
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return NULL;
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}
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if (!fu_memread_uint8_safe(buf, bufsz, 0x24, &ivinfo, error))
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return NULL;
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g_debug("Flags: 0x%02x", ivinfo);
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self->remap_support = ivinfo & IVRS_DMA_REMAP_SUPPORT_FLAG;
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return self;
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}
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gboolean
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fu_acpi_ivrs_get_dma_remap(FuAcpiIvrs *self)
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{
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g_return_val_if_fail(FU_IS_ACPI_IVRS(self), FALSE);
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return self->remap_support;
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}
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static void
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fu_acpi_ivrs_class_init(FuAcpiIvrsClass *klass)
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{
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}
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static void
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fu_acpi_ivrs_init(FuAcpiIvrs *self)
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{
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}
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