soc/amd/stoneyridge: Move IOMMU support to common

BUG=b:131682806

Change-Id: Icb02180645c9e7e6dc973438c777228b031b3f54
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32657
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/common/block/iommu/Kconfig

@@ -0,0 +1,5 @@
+config SOC_AMD_COMMON_BLOCK_IOMMU
+	bool
+	default n
+	help
+	  Select this option to use AMD common IOMMU support.

src/soc/amd/common/block/iommu/Makefile.inc

@@ -0,0 +1 @@
+ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_IOMMU) += iommu.c

src/soc/amd/common/block/iommu/iommu.c

@@ -43,13 +43,17 @@ static struct device_operations iommu_ops = {
 	.read_resources = iommu_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init = 0,
-	.scan_bus = 0,
 	.ops_pci = &lops_pci,
 };
 
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_AMD_15H_MODEL_303F_NB_IOMMU,
+	PCI_DEVICE_ID_AMD_15H_MODEL_707F_NB_IOMMU,
+	0
+};
+
 static const struct pci_driver iommu_driver __pci_driver = {
 	.ops = &iommu_ops,
 	.vendor = PCI_VENDOR_ID_AMD,
-	.device = PCI_DEVICE_ID_AMD_15H_MODEL_707F_NB_IOMMU,
+	.devices = pci_device_ids,
 };

src/soc/amd/stoneyridge/Kconfig

@@ -46,6 +46,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_AMD_PI
 	select SOC_AMD_COMMON
 	select SOC_AMD_COMMON_BLOCK
+	select SOC_AMD_COMMON_BLOCK_IOMMU
 	select SOC_AMD_COMMON_BLOCK_ACPIMMIO
 	select SOC_AMD_COMMON_BLOCK_BANKED_GPIOS
 	select SOC_AMD_COMMON_BLOCK_ACPI

src/soc/amd/stoneyridge/Makefile.inc

@@ -99,7 +99,6 @@ ramstage-y += mca.c
 ramstage-$(CONFIG_USBDEBUG) += enable_usbdebug.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c
 ramstage-y += gpio.c
-ramstage-y += iommu.c
 ramstage-y += monotonic_timer.c
 ramstage-y += southbridge.c
 ramstage-y += sb_util.c