soc/amd/common/fsp/pci: Add helper methods for PCI IRQ table

These are helper methods for interacting with the
AMD_FSP_PCIE_DEVFUNC_REMAP_HOB_GUID.

BUG=b:184766519, b:184766197
TEST=Build guybrush

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Id03d0b74ca12e7bcee11f8d13b0e802861c13923
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52911
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Raul E Rangel 2021-05-04 15:38:03 -06:00 committed by Felix Held
parent 129d473b2d
commit 7b84b02492
3 changed files with 51 additions and 0 deletions

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config SOC_AMD_COMMON_FSP_PCI
bool
select SOC_AMD_COMMON_BLOCK_PCI
help
This option enabled FSP to provide common PCI functions.

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ifeq ($(CONFIG_SOC_AMD_COMMON_FSP_PCI),y)
ramstage-y += pci_routing_info.c
endif # CONFIG_SOC_AMD_COMMON_FSP_PCI

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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/amd_pci_util.h>
#include <console/console.h>
#include <device/pci_def.h>
#include <fsp/util.h>
#include <FspGuids.h>
#include <types.h>
const struct pci_routing_info *get_pci_routing_table(size_t *entries)
{
static const struct pci_routing_info *routing_table;
static size_t routing_table_entries;
size_t hob_size = 0;
if (routing_table) {
*entries = routing_table_entries;
return routing_table;
}
routing_table = fsp_find_extension_hob_by_guid(AMD_FSP_PCIE_DEVFUNC_REMAP_HOB_GUID.b,
&hob_size);
if (routing_table == NULL || hob_size == 0) {
printk(BIOS_ERR, "Couldn't find PCIe routing HOB.\n");
return NULL;
}
routing_table_entries = hob_size / sizeof(struct pci_routing_info);
for (size_t i = 0; i < routing_table_entries; ++i) {
printk(BIOS_DEBUG, "%02x.%x: group: %u, swizzle: %u, irq: %u\n",
PCI_SLOT(routing_table[i].devfn), PCI_FUNC(routing_table[i].devfn),
routing_table[i].group, routing_table[i].swizzle, routing_table[i].irq);
}
*entries = routing_table_entries;
return routing_table;
}