Change in coreboot[master]: soc/amd/common/fsp/pci: Implement populate_pirq_data

[Raul Rangel (Code Review)]

Attention is currently required from: Jason Glenesk, Marshall Dawson, Felix Held.
Raul Rangel has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/52913 )

Change subject: soc/amd/common/fsp/pci: Implement populate_pirq_data
......................................................................

soc/amd/common/fsp/pci: Implement populate_pirq_data

This method will use the PCI routing table provided by FSP and populate
the pirq data. This data is used to set the PCI_INTR registers on the
PCI devices.

BUG=b:184766519
TEST=Build guybrush

Signed-off-by: Raul E Rangel 
Change-Id: I297fc3ca7227fb4794ac70bd046ce2f93da8b869
---
M src/soc/amd/common/fsp/pci/Makefile.inc
A src/soc/amd/common/fsp/pci/pirq.c
2 files changed, 39 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/13/52913/1

diff --git a/src/soc/amd/common/fsp/pci/Makefile.inc b/src/soc/amd/common/fsp/pci/Makefile.inc
index cc1377a..9cfc9ff 100644
--- a/src/soc/amd/common/fsp/pci/Makefile.inc
+++ b/src/soc/amd/common/fsp/pci/Makefile.inc
@@ -1,5 +1,6 @@
 ifeq ($(CONFIG_SOC_AMD_COMMON_FSP_PCI),y)

ramstage-y += pci_routing_info.c
+ramstage-y += pirq.c

endif # CONFIG_SOC_AMD_COMMON_FSP_PCI
diff --git a/src/soc/amd/common/fsp/pci/pirq.c b/src/soc/amd/common/fsp/pci/pirq.c
new file mode 100644
index 0000000..93fd280
--- /dev/null
+++ b/src/soc/amd/common/fsp/pci/pirq.c
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "pci_routing_info.h"
+#include <amdblocks/amd_pci_util.h>
+#include <stdlib.h>
+#include <types.h>
+
+void populate_pirq_data(void)
+{
+	const struct pci_routing_info *routing_table, *routing_entry;
+	size_t entries = 0;
+	struct pirq_struct *pirq;
+	unsigned int irq;
+
+	routing_table = get_pci_routing_table(&entries);
+
+	if (!routing_table)
+		return;
+
+	pirq = calloc(entries, sizeof(*pirq));
+
+	if (!pirq)
+		return;
+
+	for (size_t i = 0; i < entries; ++i) {
+		routing_entry = &routing_table[i];
+
+		pirq[i].devfn = routing_entry->devfn;
+		for (size_t j = 0; j < 4; ++j) {
+			irq = pci_calculate_irq(routing_entry, j);
+
+			pirq[i].PIN[j] = irq % 8;
+		}
+	}
+
+	pirq_data_ptr = pirq;
+	pirq_data_size = entries;
+}