mb/google/skyrim: Update DXIO descriptor definition

Update definition to be more intuitive and extensible.
Port descriptors will be defined as individual entities and added
to the descriptor list as such.

BUG=b:281059446
TEST=builds

Change-Id: Ic5a06a7d1bdb9123a0a242a571f094ac3233d7b2
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79627
Reviewed-by: Tim Van Patten <timvp@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Eric Lai <ericllai@google.com>

8 files changed, 148 insertions, 217 deletions

diff --git a/src/mainboard/google/skyrim/Kconfig b/src/mainboard/google/skyrim/Kconfig
index 98d13ddf04..dc28fbca72 100644
--- a/src/mainboard/google/skyrim/Kconfig
+++ b/src/mainboard/google/skyrim/Kconfig
@@ -141,14 +141,6 @@ config VARIANT_DIR
 	default "skyrim" if BOARD_GOOGLE_SKYRIM
 	default "winterhold" if BOARD_GOOGLE_WINTERHOLD
 
-config USE_VARIANT_DXIO_DESCRIPTOR
-	bool
-	default y if BOARD_GOOGLE_MARKARTH || BOARD_GOOGLE_WINTERHOLD
-	default n
-	help
-	  Enable this to allow a variant to override the dxio descriptor values
-	  in port_descriptors.c
-
 config USE_SELECTIVE_GOP_INIT
 	default y if CHROMEOS && RUN_FSP_GOP && BOARD_GOOGLE_SKYRIM
 
diff --git a/src/mainboard/google/skyrim/port_descriptors.c b/src/mainboard/google/skyrim/port_descriptors.c
index 5a9539f051..c2a019f25a 100644
--- a/src/mainboard/google/skyrim/port_descriptors.c
+++ b/src/mainboard/google/skyrim/port_descriptors.c
@@ -5,57 +5,6 @@
 #include <soc/platform_descriptors.h>
 #include <types.h>
 
-#if CONFIG(USE_VARIANT_DXIO_DESCRIPTOR)
-static const fsp_dxio_descriptor skyrim_mdn_dxio_descriptors[] = {};
-#else
-static const fsp_dxio_descriptor skyrim_mdn_dxio_descriptors[] = {
-	{ /* WLAN */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 0,
-		.end_logical_lane = 0,
-		.device_number = PCI_SLOT(WLAN_DEVFN),
-		.function_number = PCI_FUNC(WLAN_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.clk_req = CLK_REQ2,
-	},
-	{ /*  SD */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 1,
-		.end_logical_lane = 1,
-		.device_number = PCI_SLOT(SD_DEVFN),
-		.function_number = PCI_FUNC(SD_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_hotplug = HOTPLUG_ENHANCED,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.gpio_group_id = GPIO_27,
-		.clk_req = CLK_REQ1,
-	},
-	{ /* SSD */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 2,
-		.end_logical_lane = 3,
-		.device_number = PCI_SLOT(NVME_DEVFN),
-		.function_number = PCI_FUNC(NVME_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.gpio_group_id = GPIO_6,
-		.clk_req = CLK_REQ0,
-	},
-};
-#endif
-
 static const fsp_ddi_descriptor skyrim_mdn_ddi_descriptors[] = {
 	{ /* DDI0 - eDP */
 		.connector_type = DDI_EDP,
@@ -88,12 +37,7 @@ void mainboard_get_dxio_ddi_descriptors(
 		const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num,
 		const fsp_ddi_descriptor **ddi_descs, size_t *ddi_num)
 {
-	if (CONFIG(USE_VARIANT_DXIO_DESCRIPTOR)) {
-		variant_get_dxio_descriptor(dxio_descs, dxio_num);
-	} else {
-		*dxio_descs = skyrim_mdn_dxio_descriptors;
-		*dxio_num = ARRAY_SIZE(skyrim_mdn_dxio_descriptors);
-	}
+	variant_get_dxio_descriptors(dxio_descs, dxio_num);
 
 	*ddi_descs = skyrim_mdn_ddi_descriptors;
 	*ddi_num = ARRAY_SIZE(skyrim_mdn_ddi_descriptors);
diff --git a/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc b/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc
index 0f7cc89975..e76a9df873 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc
+++ b/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc
@@ -3,8 +3,10 @@
 bootblock-y += gpio.c
 
 romstage-y += gpio.c
+romstage-y += port_descriptors.c
 
 ramstage-y += gpio.c
+ramstage-y += port_descriptors.c
 
 verstage-$(CONFIG_VBOOT_STARTS_BEFORE_BOOTBLOCK) += gpio.c
 
diff --git a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/port_descriptors.h b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/port_descriptors.h
new file mode 100644
index 0000000000..40da0b416c
--- /dev/null
+++ b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/port_descriptors.h
@@ -0,0 +1,55 @@
+#ifndef __BASEBOARD_PORT_DESCRIPTORS_H__
+#define __BASEBOARD_PORT_DESCRIPTORS_H__
+
+#define WLAN_DEVFN PCIE_GPP_2_0_DEVFN
+#define SD_DEVFN PCIE_GPP_2_1_DEVFN
+#define NVME_DEVFN PCIE_GPP_2_2_DEVFN
+
+#define WLAN_DXIO_DESCRIPTOR {                   \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 0,                 \
+	.end_logical_lane = 0,                   \
+	.device_number = PCI_SLOT(WLAN_DEVFN),   \
+	.function_number = PCI_FUNC(WLAN_DEVFN), \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.link_aspm_L1_2 = true,                  \
+	.clk_req = CLK_REQ2,                     \
+}
+
+#define SD_DXIO_DESCRIPTOR {                     \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 1,                 \
+	.end_logical_lane = 1,                   \
+	.device_number = PCI_SLOT(SD_DEVFN),     \
+	.function_number = PCI_FUNC(SD_DEVFN),   \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_hotplug = HOTPLUG_ENHANCED,        \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.gpio_group_id = GPIO_27,                \
+	.clk_req = CLK_REQ1,                     \
+}
+
+#define NVME_DXIO_DESCRIPTOR {                   \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 2,                 \
+	.end_logical_lane = 3,                   \
+	.device_number = PCI_SLOT(NVME_DEVFN),   \
+	.function_number = PCI_FUNC(NVME_DEVFN), \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.link_aspm_L1_2 = true,                  \
+	.gpio_group_id = GPIO_6,                 \
+	.clk_req = CLK_REQ0,                     \
+}
+
+#endif //__BASEBOARD_PORT_DESCRIPTORS_H__
diff --git a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
index e49b7c4e80..f3bdf4c4fb 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
@@ -7,10 +7,6 @@
 #include <soc/pci_devs.h>
 #include <platform_descriptors.h>
 
-#define WLAN_DEVFN	PCIE_GPP_2_0_DEVFN
-#define SD_DEVFN	PCIE_GPP_2_1_DEVFN
-#define NVME_DEVFN	PCIE_GPP_2_2_DEVFN
-
 /* This function provides base GPIO configuration table. */
 void baseboard_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 
@@ -41,7 +37,10 @@ void baseboard_romstage_gpio_table(const struct soc_amd_gpio **gpio, size_t *siz
 /* This function allows variant to override any GPIO init in romstage. */
 void variant_romstage_override_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 
-/* Allow variants to override the DXIO Descriptors */
-void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num);
+/*
+ * This function allows a variant to override dxio descriptors passed to the FSP.
+ */
+void variant_get_dxio_descriptors(const fsp_dxio_descriptor **dxio_descriptor,
+					   size_t *num);
 
 #endif /* __BASEBOARD_VARIANTS_H__ */
diff --git a/src/mainboard/google/skyrim/variants/baseboard/port_descriptors.c b/src/mainboard/google/skyrim/variants/baseboard/port_descriptors.c
new file mode 100644
index 0000000000..296bb18ff2
--- /dev/null
+++ b/src/mainboard/google/skyrim/variants/baseboard/port_descriptors.c
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/variants.h>
+#include <baseboard/port_descriptors.h>
+#include <soc/platform_descriptors.h>
+
+enum baseboard_dxio_port_id {
+	BASEBOARD_DXIO_WLAN,
+	BASEBOARD_DXIO_SD,
+	BASEBOARD_DXIO_STORAGE,
+};
+
+static fsp_dxio_descriptor skyrim_mdn_dxio_descriptors[] = {
+	[BASEBOARD_DXIO_WLAN] = WLAN_DXIO_DESCRIPTOR,
+	[BASEBOARD_DXIO_SD] = SD_DXIO_DESCRIPTOR,
+	[BASEBOARD_DXIO_STORAGE] = NVME_DXIO_DESCRIPTOR,
+};
+
+__weak void variant_get_dxio_descriptors(const fsp_dxio_descriptor **dxio_descriptor, size_t *num)
+{
+	*dxio_descriptor = skyrim_mdn_dxio_descriptors;
+	*num = ARRAY_SIZE(skyrim_mdn_dxio_descriptors);
+}
diff --git a/src/mainboard/google/skyrim/variants/markarth/port_descriptors.c b/src/mainboard/google/skyrim/variants/markarth/port_descriptors.c
index 94eb465edf..e78288ae04 100644
--- a/src/mainboard/google/skyrim/variants/markarth/port_descriptors.c
+++ b/src/mainboard/google/skyrim/variants/markarth/port_descriptors.c
@@ -1,81 +1,40 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <baseboard/variants.h>
+#include <baseboard/port_descriptors.h>
 #include <console/console.h>
-#include <gpio.h>
 #include <soc/platform_descriptors.h>
-#include <types.h>
 
-static const fsp_dxio_descriptor emmc_dxio_descriptors[] = {
-	{
-		/* WLAN */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 0,
-		.end_logical_lane = 0,
-		.device_number = PCI_SLOT(WLAN_DEVFN),
-		.function_number = PCI_FUNC(WLAN_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.clk_req = CLK_REQ2,
-	},
-	{
-		/* eMMC */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 1,
-		.end_logical_lane = 1,
-		.device_number = PCI_SLOT(SD_DEVFN),
-		.function_number = PCI_FUNC(SD_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.gpio_group_id = GPIO_6,
-		.clk_req = CLK_REQ1,
-	},
+enum markarth_dxio_port_id {
+	MARKARTH_DXIO_WLAN,
+	MARKARTH_DXIO_STORAGE,
 };
 
-static const fsp_dxio_descriptor nvme_dxio_descriptors[] = {
-	{
-		/* WLAN */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 0,
-		.end_logical_lane = 0,
-		.device_number = PCI_SLOT(WLAN_DEVFN),
-		.function_number = PCI_FUNC(WLAN_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.clk_req = CLK_REQ2,
-	},
-	{
-		/* SSD */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 2,
-		.end_logical_lane = 3,
-		.device_number = PCI_SLOT(NVME_DEVFN),
-		.function_number = PCI_FUNC(NVME_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.gpio_group_id = GPIO_6,
-		.clk_req = CLK_REQ0,
-	},
-};
+#define EMMC_DXIO_DESCRIPTOR {                   \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 1,                 \
+	.end_logical_lane = 1,                   \
+	.device_number = PCI_SLOT(SD_DEVFN),     \
+	.function_number = PCI_FUNC(SD_DEVFN),   \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.link_aspm_L1_2 = true,                  \
+	.gpio_group_id = GPIO_6,                 \
+	.clk_req = CLK_REQ1,                     \
+}
 
 #define EMMC_CLKREQ_GPIO 115
-void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num)
+
+static fsp_dxio_descriptor markarth_dxio_descriptors[] = {
+	[MARKARTH_DXIO_WLAN] = WLAN_DXIO_DESCRIPTOR,
+	/* This value modified at runtime, default to emmc */
+	[MARKARTH_DXIO_STORAGE] = EMMC_DXIO_DESCRIPTOR,
+};
+
+void variant_get_dxio_descriptors(const fsp_dxio_descriptor **dxio_descriptor, size_t *num)
 {
 	/*
 	 * We can determine if a device is populated based on the state of the clkreq
@@ -87,11 +46,10 @@ void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t
 	 */
 	if (gpio_get(EMMC_CLKREQ_GPIO)) {
 		printk(BIOS_DEBUG, "Enabling NVMe.\n");
-		*dxio_num = ARRAY_SIZE(nvme_dxio_descriptors);
-		*dxio_descs = nvme_dxio_descriptors;
+		markarth_dxio_descriptors[MARKARTH_DXIO_STORAGE] = (fsp_dxio_descriptor)NVME_DXIO_DESCRIPTOR;
 	} else {
-		printk(BIOS_DEBUG, "Enabling eMMC.\n");
-		*dxio_num = ARRAY_SIZE(emmc_dxio_descriptors);
-		*dxio_descs = emmc_dxio_descriptors;
+		printk(BIOS_DEBUG, "Defaulting to eMMC.\n");
 	}
+	*dxio_descriptor = markarth_dxio_descriptors;
+	*num = ARRAY_SIZE(markarth_dxio_descriptors);
 }
diff --git a/src/mainboard/google/skyrim/variants/winterhold/port_descriptors.c b/src/mainboard/google/skyrim/variants/winterhold/port_descriptors.c
index 94eb465edf..66a8c30d9c 100644
--- a/src/mainboard/google/skyrim/variants/winterhold/port_descriptors.c
+++ b/src/mainboard/google/skyrim/variants/winterhold/port_descriptors.c
@@ -1,81 +1,40 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <baseboard/variants.h>
+#include <baseboard/port_descriptors.h>
 #include <console/console.h>
-#include <gpio.h>
 #include <soc/platform_descriptors.h>
-#include <types.h>
 
-static const fsp_dxio_descriptor emmc_dxio_descriptors[] = {
-	{
-		/* WLAN */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 0,
-		.end_logical_lane = 0,
-		.device_number = PCI_SLOT(WLAN_DEVFN),
-		.function_number = PCI_FUNC(WLAN_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.clk_req = CLK_REQ2,
-	},
-	{
-		/* eMMC */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 1,
-		.end_logical_lane = 1,
-		.device_number = PCI_SLOT(SD_DEVFN),
-		.function_number = PCI_FUNC(SD_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.gpio_group_id = GPIO_6,
-		.clk_req = CLK_REQ1,
-	},
+enum winterhold_dxio_port_id {
+	WINTERHOLD_DXIO_WLAN,
+	WINTERHOLD_DXIO_STORAGE,
 };
 
-static const fsp_dxio_descriptor nvme_dxio_descriptors[] = {
-	{
-		/* WLAN */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 0,
-		.end_logical_lane = 0,
-		.device_number = PCI_SLOT(WLAN_DEVFN),
-		.function_number = PCI_FUNC(WLAN_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.clk_req = CLK_REQ2,
-	},
-	{
-		/* SSD */
-		.engine_type = PCIE_ENGINE,
-		.port_present = true,
-		.start_logical_lane = 2,
-		.end_logical_lane = 3,
-		.device_number = PCI_SLOT(NVME_DEVFN),
-		.function_number = PCI_FUNC(NVME_DEVFN),
-		.link_speed_capability = GEN3,
-		.turn_off_unused_lanes = true,
-		.link_aspm = ASPM_L1,
-		.link_aspm_L1_1 = true,
-		.link_aspm_L1_2 = true,
-		.gpio_group_id = GPIO_6,
-		.clk_req = CLK_REQ0,
-	},
-};
+#define EMMC_DXIO_DESCRIPTOR {                   \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 1,                 \
+	.end_logical_lane = 1,                   \
+	.device_number = PCI_SLOT(SD_DEVFN),     \
+	.function_number = PCI_FUNC(SD_DEVFN),   \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.link_aspm_L1_2 = true,                  \
+	.gpio_group_id = GPIO_6,                 \
+	.clk_req = CLK_REQ1,                     \
+}
 
 #define EMMC_CLKREQ_GPIO 115
-void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num)
+
+static fsp_dxio_descriptor winterhold_dxio_descriptors[] = {
+	[WINTERHOLD_DXIO_WLAN] = WLAN_DXIO_DESCRIPTOR,
+	/* This value modified at runtime, default to emmc */
+	[WINTERHOLD_DXIO_STORAGE] = EMMC_DXIO_DESCRIPTOR,
+};
+
+void variant_get_dxio_descriptors(const fsp_dxio_descriptor **dxio_descriptor, size_t *num)
 {
 	/*
 	 * We can determine if a device is populated based on the state of the clkreq
@@ -87,11 +46,10 @@ void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t
 	 */
 	if (gpio_get(EMMC_CLKREQ_GPIO)) {
 		printk(BIOS_DEBUG, "Enabling NVMe.\n");
-		*dxio_num = ARRAY_SIZE(nvme_dxio_descriptors);
-		*dxio_descs = nvme_dxio_descriptors;
+		winterhold_dxio_descriptors[WINTERHOLD_DXIO_STORAGE] = (fsp_dxio_descriptor)NVME_DXIO_DESCRIPTOR;
 	} else {
-		printk(BIOS_DEBUG, "Enabling eMMC.\n");
-		*dxio_num = ARRAY_SIZE(emmc_dxio_descriptors);
-		*dxio_descs = emmc_dxio_descriptors;
+		printk(BIOS_DEBUG, "Defaulting to eMMC.\n");
 	}
+	*dxio_descriptor = winterhold_dxio_descriptors;
+	*num = ARRAY_SIZE(winterhold_dxio_descriptors);
 }