Display VERSION partition info on BMC machines

On supported platforms read the VERSION partition on startup and display
the available versions strings in the System Information screen.

This adds a skeleton hostboot.c to support possible additional BMC
platform support.

Signed-off-by: Sam Mendoza-Jonas <sam@mendozajonas.com>

4 files changed, 65 insertions, 0 deletions

diff --git a/discover/Makefile.am b/discover/Makefile.am
index 1672035..f55f1cd 100644
--- a/discover/Makefile.am
+++ b/discover/Makefile.am
@@ -79,7 +79,21 @@ discover_platform_ro_SOURCES = \
 	discover/ipmi.h \
 	discover/dt.c \
 	discover/dt.h \
+	discover/hostboot.h \
 	discover/platform-powerpc.c
 
+discover_platform_ro_CPPFLAGS = \
+	$(AM_CPPFLAGS)
+
+if ENABLE_MTD
+discover_platform_ro_SOURCES += \
+	discover/hostboot.c
+
+discover_platform_ro_LDFLAGS = \
+	$(core_lib) \
+	$(UDEV_LIBS)
+
+endif
+
 discover_platform_ro_LINK = \
 	$(LD) -r -o $@
diff --git a/discover/hostboot.c b/discover/hostboot.c
new file mode 100644
index 0000000..9a27b0f
--- /dev/null
+++ b/discover/hostboot.c
@@ -0,0 +1,26 @@
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <log/log.h>
+#include <talloc/talloc.h>
+#include <flash/flash.h>
+
+#include "hostboot.h"
+
+void hostboot_load_versions(struct system_info *info)
+{
+	int n = 0;
+
+	n = flash_parse_version(info, &info->platform_current, true);
+	if (n < 0)
+		pb_log("Failed to read platform versions for current side\n");
+	else
+		info->n_current = n;
+
+	n = flash_parse_version(info, &info->platform_other, false);
+	if (n < 0)
+		pb_log("Failed to read platform versions for other side\n");
+	else
+		info->n_other = n;
+}
diff --git a/discover/hostboot.h b/discover/hostboot.h
new file mode 100644
index 0000000..cb1e497
--- /dev/null
+++ b/discover/hostboot.h
@@ -0,0 +1,15 @@
+#ifndef HOSTBOOT_H
+#define HOSTBOOT_H
+
+#include "config.h"
+#include <types/types.h>
+
+#ifdef MTD_SUPPORT
+void hostboot_load_versions(struct system_info *info);
+#else
+static inline void hostboot_load_versions(struct system_info *info)
+{
+	(void)info;
+}
+#endif
+#endif /* HOSTBOOT_H */
diff --git a/discover/platform-powerpc.c b/discover/platform-powerpc.c
index 992123e..46f81d2 100644
--- a/discover/platform-powerpc.c
+++ b/discover/platform-powerpc.c
@@ -14,7 +14,9 @@
 #include <list/list.h>
 #include <log/log.h>
 #include <process/process.h>
+#include <types/types.h>
 
+#include "hostboot.h"
 #include "platform.h"
 #include "ipmi.h"
 #include "dt.h"
@@ -43,6 +45,7 @@ struct platform_powerpc {
 				bool persistent);
 	int 		(*set_os_boot_sensor)(
 				struct platform_powerpc *platform);
+	void		(*get_platform_versions)(struct system_info *info);
 };
 
 static const char *known_params[] = {
@@ -1094,6 +1097,9 @@ static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
 	if (platform->ipmi)
 		get_ipmi_bmc_mac(p, sysinfo->bmc_mac);
 
+	if (platform->get_platform_versions)
+		platform->get_platform_versions(sysinfo);
+
 	return 0;
 }
 
@@ -1131,6 +1137,10 @@ static bool probe(struct platform *p, void *ctx)
 		pb_log("platform: no IPMI parameter support\n");
 	}
 
+	rc = stat("/proc/device-tree/bmc", &statbuf);
+	if (!rc)
+		platform->get_platform_versions = hostboot_load_versions;
+
 	return true;
 }