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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/iommu.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <lib.h>
static void iommu_read_resources(struct device *dev)
{
struct resource *res;
/* Get the normal pci resources of this device */
pci_dev_read_resources(dev);
/* IOMMU MMIO registers */
res = new_resource(dev, IOMMU_CAP_BASE_LO);
res->size = 512 * KiB;
res->align = log2(res->size);
res->gran = log2(res->size);
res->limit = 0xffffffff; /* 4G */
res->flags = IORESOURCE_MEM;
}
static void iommu_enable_resources(struct device *dev)
{
uint32_t base = pci_read_config32(dev, IOMMU_CAP_BASE_LO);
base |= IOMMU_ENABLE;
pci_write_config32(dev, IOMMU_CAP_BASE_LO, base);
printk(BIOS_DEBUG, "%s -> mmio enable: %08X", __func__,
pci_read_config32(dev, IOMMU_CAP_BASE_LO));
pci_dev_enable_resources(dev);
}
#if CONFIG(HAVE_ACPI_TABLES)
static const char *iommu_acpi_name(const struct device *dev)
{
return "IOMM";
}
#endif
struct device_operations amd_iommu_ops = {
.read_resources = iommu_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = iommu_enable_resources,
.ops_pci = &pci_dev_ops_pci,
#if CONFIG(HAVE_ACPI_TABLES)
.acpi_name = iommu_acpi_name,
#endif
};
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