From 74a70f8b5ab22a6284299dfdd71d6326d0717482 Mon Sep 17 00:00:00 2001
From: Christophe Lombard <clombard@linux.ibm.com>
Date: Tue, 29 Aug 2023 11:24:09 +0200
Subject: platforms/astbmc: Enable PLDM support

Last BMC firmware is available with a complete PLDM support on Rainier
system.
This patch allows initially to:
- Initialize the MCTP core.
- Enable the mctp binding over LPC bus interface and new wrappers to send
and receive PLDM messages over the mctp library.
- Retrieve all needed PLDM data.
- "Virtualize" the content of a BMC flash based on lid files.

Then, others mandatory support (watchdog, opal rtc, opal ipmi) are enabled.

Signed-off-by: Christophe Lombard <clombard@linux.ibm.com>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
---
 core/init.c               | 16 +++++++++++++++-
 platforms/astbmc/astbmc.h |  4 ++++
 platforms/astbmc/common.c | 34 ++++++++++++++++++++++++++++++++++
 platforms/astbmc/pnor.c   | 25 +++++++++++++++++++++++++
 platforms/qemu/qemu.c     |  6 ++++++
 5 files changed, 84 insertions(+), 1 deletion(-)

diff --git a/core/init.c b/core/init.c
index 73748a5..2d8a545 100644
--- a/core/init.c
+++ b/core/init.c
@@ -34,6 +34,7 @@
 #include <libfdt/libfdt.h>
 #include <timer.h>
 #include <ipmi.h>
+#include <pldm.h>
 #include <sensor.h>
 #include <xive.h>
 #include <nvram.h>
@@ -562,8 +563,12 @@ void __noreturn load_and_boot_kernel(bool is_reboot)
 
 	trustedboot_exit_boot_services();
 
+#ifdef CONFIG_PLDM
+	pldm_platform_send_progress_state_change(
+		PLDM_STATE_SET_BOOT_PROG_STATE_STARTING_OP_SYS);
+#else
 	ipmi_set_fw_progress_sensor(IPMI_FW_OS_BOOT);
-
+#endif
 
 	if (!is_reboot) {
 		/* We wait for the nvram read to complete here so we can
@@ -1408,10 +1413,19 @@ void __noreturn __nomcount main_cpu_entry(const void *fdt)
 	/* Setup ibm,firmware-versions if able */
 	if (platform.bmc) {
 		flash_dt_add_fw_version();
+#ifdef CONFIG_PLDM
+		pldm_fru_dt_add_bmc_version();
+#else
 		ipmi_dt_add_bmc_info();
+#endif
 	}
 
+#ifdef CONFIG_PLDM
+	pldm_platform_send_progress_state_change(
+		PLDM_STATE_SET_BOOT_PROG_STATE_PCI_RESORUCE_CONFIG);
+#else
 	ipmi_set_fw_progress_sensor(IPMI_FW_PCI_INIT);
+#endif
 
 	/*
 	 * These last few things must be done as late as possible
diff --git a/platforms/astbmc/astbmc.h b/platforms/astbmc/astbmc.h
index 00f2212..7783fe2 100644
--- a/platforms/astbmc/astbmc.h
+++ b/platforms/astbmc/astbmc.h
@@ -96,6 +96,10 @@ extern const struct bmc_platform bmc_plat_ast2600_openbmc;
 extern void astbmc_early_init(void);
 extern int64_t astbmc_ipmi_reboot(void);
 extern int64_t astbmc_ipmi_power_down(uint64_t request);
+#ifdef CONFIG_PLDM
+extern int astbmc_pldm_init(void);
+extern int pnor_pldm_init(void);
+#endif
 extern void astbmc_init(void);
 extern void astbmc_ext_irq_serirq_cpld(unsigned int chip_id);
 extern int pnor_init(void);
diff --git a/platforms/astbmc/common.c b/platforms/astbmc/common.c
index 6697230..675eb21 100644
--- a/platforms/astbmc/common.c
+++ b/platforms/astbmc/common.c
@@ -9,6 +9,7 @@
 #include <xscom.h>
 #include <ast.h>
 #include <ipmi.h>
+#include <pldm.h>
 #include <bt.h>
 #include <errorlog.h>
 #include <lpc.h>
@@ -109,6 +110,36 @@ static int astbmc_fru_init(void)
 	return 0;
 }
 
+#ifdef CONFIG_PLDM
+int astbmc_pldm_init(void)
+{
+	int rc = OPAL_SUCCESS;
+
+	/* PLDM over MCTP */
+	rc = pldm_mctp_init();
+	if (!rc) {
+		/* Initialize PNOR/NVRAM */
+		rc = pnor_pldm_init();
+
+		if (!rc) {
+			pldm_watchdog_init();
+			pldm_rtc_init();
+			pldm_opal_init();
+		}
+	}
+
+	/* Initialize elog */
+	elog_init();
+
+	/* Setup UART console for use by Linux via OPAL API */
+	set_opal_console(&uart_opal_con);
+
+	if (rc)
+		prlog(PR_WARNING, "Failed to configure PLDM\n");
+
+	return rc;
+}
+#endif
 
 void astbmc_init(void)
 {
@@ -542,6 +573,9 @@ void astbmc_early_init(void)
 
 void astbmc_exit(void)
 {
+#ifdef CONFIG_PLDM
+	return;
+#endif
 	ipmi_wdt_final_reset();
 
 	ipmi_set_boot_count();
diff --git a/platforms/astbmc/pnor.c b/platforms/astbmc/pnor.c
index 64f2249..853da46 100644
--- a/platforms/astbmc/pnor.c
+++ b/platforms/astbmc/pnor.c
@@ -5,6 +5,7 @@
 #include <device.h>
 #include <console.h>
 #include <opal.h>
+#include <pldm.h>
 #include <libflash/ipmi-hiomap.h>
 #include <libflash/mbox-flash.h>
 #include <libflash/libflash.h>
@@ -32,6 +33,30 @@ static enum ast_flash_style ast_flash_get_fallback_style(void)
     return raw_mem;
 }
 
+#ifdef CONFIG_PLDM
+int pnor_pldm_init(void)
+{
+	struct blocklevel_device *bl = NULL;
+	int rc = 0;
+
+	rc = pldm_lid_files_init(&bl);
+	if (rc) {
+		prerror("PLAT: Failed to init PNOR driver\n");
+		goto fail;
+	}
+
+	rc = flash_register(bl);
+	if (!rc)
+		return 0;
+
+fail:
+	if (bl)
+		pldm_lid_files_exit(bl);
+
+	return rc;
+}
+#endif
+
 int pnor_init(void)
 {
 	struct spi_flash_ctrl *pnor_ctrl = NULL;
diff --git a/platforms/qemu/qemu.c b/platforms/qemu/qemu.c
index 96153e8..0f6e089 100644
--- a/platforms/qemu/qemu.c
+++ b/platforms/qemu/qemu.c
@@ -4,6 +4,7 @@
 #include <skiboot.h>
 #include <console.h>
 #include <device.h>
+#include <ast.h>
 #include <ipmi.h>
 
 #include <platforms/astbmc/astbmc.h>
@@ -80,7 +81,12 @@ static void qemu_init(void)
 	if (!bt_device_present) {
 		set_opal_console(&uart_opal_con);
 	} else {
+#ifdef CONFIG_PLDM
+		/* need to be checked according platform: P10, P11 ... */
+		astbmc_pldm_init();
+#else
 		astbmc_init();
+#endif
 	}
 }
 
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