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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdbool.h>
#include <console/console.h>
#include <device/device.h>
#include <device/resource.h>
#include <defs_iio.h>
#include <hob_iiouds.h>
#include <IioPcieConfigUpd.h>
#include <soc/chip_common.h>
/*
* Used for IIO stacks for accelerators and other functionality (IOAT).
* Those have only integrated PCI endpoints (no bridges) behind the host bridge.
*/
static struct device_operations ioat_domain_ops = {
.read_resources = noop_read_resources,
.set_resources = pci_domain_set_resources,
.scan_bus = pci_host_bridge_scan_bus,
};
static void create_ioat_domain(const union xeon_domain_path dp, struct bus *const upstream,
const unsigned int bus_base, const unsigned int bus_limit,
const resource_t mem32_base, const resource_t mem32_limit,
const resource_t mem64_base, const resource_t mem64_limit)
{
union xeon_domain_path new_path = {
.domain_path = dp.domain_path
};
new_path.bus = bus_base;
struct device_path path = {
.type = DEVICE_PATH_DOMAIN,
.domain = {
.domain = new_path.domain_path,
},
};
struct device *const domain = alloc_dev(upstream, &path);
if (!domain)
die("%s: out of memory.\n", __func__);
domain->ops = &ioat_domain_ops;
struct bus *const bus = alloc_bus(domain);
bus->secondary = bus_base;
bus->subordinate = bus->secondary;
bus->max_subordinate = bus_limit;
unsigned int index = 0;
if (mem32_base <= mem32_limit) {
struct resource *const res = new_resource(domain, index++);
res->base = mem32_base;
res->limit = mem32_limit;
res->size = res->limit - res->base + 1;
res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED;
}
if (mem64_base <= mem64_limit) {
struct resource *const res = new_resource(domain, index++);
res->base = mem64_base;
res->limit = mem64_limit;
res->size = res->limit - res->base + 1;
res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED;
}
}
void soc_create_ioat_domains(const union xeon_domain_path path, struct bus *const bus, const STACK_RES *const sr)
{
if (sr->BusLimit < sr->BusBase + HQM_BUS_OFFSET + HQM_RESERVED_BUS) {
printk(BIOS_WARNING,
"Ignoring IOAT domain with limited bus range.\n");
return;
}
if (sr->PciResourceMem64Limit - sr->PciResourceMem64Base + 1
< 2 * CPM_MMIO_SIZE + 2 * HQM_MMIO_SIZE) {
printk(BIOS_WARNING,
"Ignoring IOAT domain with limited 64-bit MMIO window.\n");
return;
}
/* The FSP HOB doesn't provide accurate information about the
resource allocation. Hence use pre-defined offsets. Based
on ACPI code in create_dsdt_ioat_resource(), soc_acpi.c: */
resource_t mem64_base, mem64_limit, bus_base, bus_limit;
/* CPM0 */
mem64_base = sr->PciResourceMem64Base;
mem64_limit = mem64_base + CPM_MMIO_SIZE - 1;
bus_base = sr->BusBase + CPM_BUS_OFFSET;
bus_limit = bus_base + CPM_RESERVED_BUS;
create_ioat_domain(path, bus, bus_base, bus_limit, 0, -1, mem64_base, mem64_limit);
/* HQM0 */
mem64_base = mem64_limit + 1;
mem64_limit = mem64_base + HQM_MMIO_SIZE - 1;
bus_base = sr->BusBase + HQM_BUS_OFFSET;
bus_limit = bus_base + HQM_RESERVED_BUS;
create_ioat_domain(path, bus, bus_base, bus_limit, 0, -1, mem64_base, mem64_limit);
/* CPM1 (optional) */
mem64_base = mem64_limit + 1;
mem64_limit = mem64_base + CPM_MMIO_SIZE - 1;
bus_base = sr->BusBase + CPM1_BUS_OFFSET;
bus_limit = bus_base + CPM_RESERVED_BUS;
if (bus_limit <= sr->BusLimit)
create_ioat_domain(path, bus, bus_base, bus_limit, 0, -1, mem64_base, mem64_limit);
/* HQM1 (optional) */
mem64_base = mem64_limit + 1;
mem64_limit = mem64_base + HQM_MMIO_SIZE - 1;
bus_base = sr->BusBase + HQM1_BUS_OFFSET;
bus_limit = bus_base + HQM_RESERVED_BUS;
if (bus_limit <= sr->BusLimit)
create_ioat_domain(path, bus, bus_base, bus_limit, 0, -1, mem64_base, mem64_limit);
/* DINO */
mem64_base = mem64_limit + 1;
mem64_limit = sr->PciResourceMem64Limit;
bus_base = sr->BusBase;
bus_limit = bus_base;
create_ioat_domain(path, bus, bus_base, bus_limit, sr->PciResourceMem32Base, sr->PciResourceMem32Limit,
mem64_base, mem64_limit);
}
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