mb/ocp/deltalake: Implement SMBIOS type 9 -- system slots by SKU

Create SMBIOS type 9 by getting PCIe config from BMC.

TEST=Check SMBIOS type 9 is created correctly on different SKUs

Change-Id: Ifd2031b91c960ff2add8807247271eb7c38a0bf2
Signed-off-by: Morgan Jang <Morgan_Jang@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42280
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/ocp/deltalake/ramstage.c

@@ -8,6 +8,12 @@
 #include <soc/lewisburg_pch_gpio_defs.h>
 #include <soc/ramstage.h>
 #include <stdio.h>
+#include <string.h>
+#include <smbios.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <soc/util.h>
+#include <hob_iiouds.h>
 
 #include "ipmi.h"
 
@@ -34,6 +40,32 @@ const char *smbios_mainboard_location_in_chassis(void)
 	return slot_id_str;
 }
 
+/* System Slot Socket, Stack, Type and Data bus width Information */
+typedef struct {
+	u8 stack;
+	u8 slot_type;
+	u8 slot_data_bus_width;
+	u8 dev_func;
+	const char *slot_designator;
+} slot_info;
+
+slot_info slotinfo[] = {
+	{CSTACK,  SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0xE8, "DL on board M.2 #1 - boot"},
+	{PSTACK1, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x10, "DL on board M.2 #2"},
+	{PSTACK1, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x18, "Mezz Card"},
+	{PSTACK3, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x00, "1ou expansion M.2 #1"},
+	{PSTACK3, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x08, "1ou expansion M.2 #2"},
+	{PSTACK3, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x10, "1ou expansion M.2 #3"},
+	{PSTACK3, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x18, "1ou expansion M.2 #4"},
+	{PSTACK0, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x00, "2ou expansion M.2 #1"},
+	{PSTACK0, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x08, "2ou expansion M.2 #2"},
+	{PSTACK0, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x10, "2ou expansion M.2 #3"},
+	{PSTACK0, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x18, "2ou expansion M.2 #4"},
+	{PSTACK1, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x00, "2ou expansion M.2 #5"},
+	{PSTACK1, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x08, "2ou expansion M.2 #6"},
+	{PSTACK3, SlotTypePciExpressGen3X16, SlotDataBusWidth16X, 0x00, "Mezz Card(Class-2)"},
+};
+
 static void dl_oem_smbios_strings(struct device *dev, struct smbios_type11 *t)
 {
 	uint8_t pcie_config = 0;
@@ -70,10 +102,122 @@ static void dl_oem_smbios_strings(struct device *dev, struct smbios_type11 *t)
 	}
 }
 
+#if CONFIG(GENERATE_SMBIOS_TABLES)
+static int create_smbios_type9(int *handle, unsigned long *current)
+{
+	int index;
+	int length = 0;
+	uint8_t slot_length;
+	uint8_t sec_bus;
+	uint8_t slot_usage;
+	uint8_t pcie_config = 0;
+	uint8_t characteristics_1 = 0;
+	uint8_t characteristics_2 = 0;
+	uint32_t vendor_device_id;
+	uint32_t stack_busnos[6];
+	pci_devfn_t pci_dev;
+	unsigned int cap;
+	uint16_t sltcap;
+
+	if (ipmi_get_pcie_config(&pcie_config) != CB_SUCCESS)
+		printk(BIOS_ERR, "Failed to get IPMI PCIe config\n");
+
+	get_stack_busnos(stack_busnos);
+
+	for (index = 0; index < ARRAY_SIZE(slotinfo); index++) {
+		if (pcie_config == PCIE_CONFIG_A) {
+			if (index == 0 || index == 2)
+				printk(BIOS_INFO, "Find Config-A slot: %s\n",
+					slotinfo[index].slot_designator);
+			else
+				continue;
+		}
+		if (pcie_config == PCIE_CONFIG_B) {
+			if (index == 0 || index == 1 || index == 2 || index == 3 || index == 4
+				|| index == 5 || index == 6)
+				printk(BIOS_INFO, "Find Config-B slot: %s\n",
+					slotinfo[index].slot_designator);
+			else
+				continue;
+		}
+		if (pcie_config == PCIE_CONFIG_C) {
+			if (index == 0 || index == 1 || index == 7 || index == 8 || index == 9
+				|| index == 10 || index == 11 || index == 12 || index == 13)
+				printk(BIOS_INFO, "Find Config-C slot: %s\n",
+					slotinfo[index].slot_designator);
+			else
+				continue;
+		}
+		if (pcie_config == PCIE_CONFIG_D) {
+			if (index != 13)
+				printk(BIOS_INFO, "Find Config-D slot: %s\n",
+					slotinfo[index].slot_designator);
+			else
+				continue;
+		}
+
+		if (slotinfo[index].slot_data_bus_width == SlotDataBusWidth16X)
+			slot_length = SlotLengthLong;
+		else
+			slot_length = SlotLengthShort;
+
+		pci_dev = PCI_DEV(stack_busnos[slotinfo[index].stack],
+			slotinfo[index].dev_func >> 3, slotinfo[index].dev_func & 0x7);
+		sec_bus = pci_s_read_config8(pci_dev, PCI_SECONDARY_BUS);
+
+		if (sec_bus == 0xFF) {
+			slot_usage = SlotUsageUnknown;
+		} else {
+			/* Checking for Slot device availability */
+			pci_dev = PCI_DEV(sec_bus, 0, 0);
+			vendor_device_id = pci_s_read_config32(pci_dev, 0);
+			if (vendor_device_id == 0xFFFFFFFF)
+				slot_usage  = SlotUsageAvailable;
+			else
+				slot_usage = SlotUsageInUse;
+		}
+
+		characteristics_1 |= SMBIOS_SLOT_3P3V; // Provides33Volts
+		characteristics_2 |= SMBIOS_SLOT_PME; // PmeSiganalSupported
+
+		cap = pci_s_find_capability(pci_dev, PCI_CAP_ID_PCIE);
+		sltcap = pci_s_read_config16(pci_dev, cap + PCI_EXP_SLTCAP);
+		if (sltcap & PCI_EXP_SLTCAP_HPC)
+			characteristics_2 |= SMBIOS_SLOT_HOTPLUG;
+
+		length += smbios_write_type9(current, handle,
+					  slotinfo[index].slot_designator,
+					  slotinfo[index].slot_type,
+					  slotinfo[index].slot_data_bus_width,
+					  slot_usage,
+					  slot_length,
+					  characteristics_1,
+					  characteristics_2,
+					  stack_busnos[slotinfo[index].stack],
+					  slotinfo[index].dev_func);
+	}
+
+	return length;
+}
+
+static int mainboard_smbios_data(struct device *dev, int *handle, unsigned long *current)
+{
+	int len = 0;
+
+	len += create_smbios_type9(handle, current);
+
+	return len;
+}
+#endif
+
+
 static void mainboard_enable(struct device *dev)
 {
 	dev->ops->get_smbios_strings = dl_oem_smbios_strings,
 	read_fru_areas(CONFIG_BMC_KCS_BASE, CONFIG_FRU_DEVICE_ID, 0, &fru_strings);
+#if (CONFIG(GENERATE_SMBIOS_TABLES))
+	dev->ops->get_smbios_data = mainboard_smbios_data;
+#endif
 }
 
 void mainboard_silicon_init_params(FSPS_UPD *params)