bootstd: Add a bootdev command

Add a 'bootdev' command to handle listing and selection of bootdevs.

Disable standard boot for a few boards which otherwise run out of space.

Signed-off-by: Simon Glass <sjg@chromium.org>

MAINTAINERS

@@ -700,6 +700,7 @@ F:	boot/bootdev*.c
 F:	boot/bootflow.c
 F:	boot/bootmeth*.c
 F:	boot/bootstd.c
+F:	cmd/bootdev.c
 F:	include/bootdev*.h
 F:	include/bootflow.h
 F:	include/bootmeth.h

cmd/Kconfig

@@ -211,6 +211,16 @@ config CMD_BOOTM_PRE_LOAD
 	 This stage allow to check or modify the image provided
 	 to the bootm command.
 
+config CMD_BOOTDEV
+	bool "bootdev"
+	depends on BOOTSTD
+	default y if BOOTSTD_FULL
+	help
+	  Support listing available bootdevs (boot devices) which can provide an
+	  OS to boot, as well as showing information about a particular one.
+
+	  This command is not necessary for bootstd to work.
+
 config BOOTM_EFI
 	bool "Support booting UEFI FIT images"
 	depends on CMD_BOOTEFI && CMD_BOOTM && FIT

cmd/Makefile

@@ -19,6 +19,7 @@ obj-$(CONFIG_CMD_AB_SELECT) += ab_select.o
 obj-$(CONFIG_CMD_ADC) += adc.o
 obj-$(CONFIG_CMD_ARMFLASH) += armflash.o
 obj-$(CONFIG_HAVE_BLOCK_DEVICE) += blk_common.o
+obj-$(CONFIG_CMD_BOOTDEV) += bootdev.o
 obj-$(CONFIG_CMD_SOURCE) += source.o
 obj-$(CONFIG_CMD_BCB) += bcb.o
 obj-$(CONFIG_CMD_BDI) += bdinfo.o

cmd/bootdev.c

@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * 'bootdev' command
+ *
+ * Copyright 2021 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <bootdev.h>
+#include <bootflow.h>
+#include <bootstd.h>
+#include <command.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/uclass-internal.h>
+
+static int bootdev_check_state(struct bootstd_priv **stdp)
+{
+	struct bootstd_priv *std;
+	int ret;
+
+	ret = bootstd_get_priv(&std);
+	if (ret)
+		return ret;
+	if (!std->cur_bootdev) {
+		printf("Please use 'bootdev select' first\n");
+		return -ENOENT;
+	}
+	*stdp = std;
+
+	return 0;
+}
+
+static int do_bootdev_list(struct cmd_tbl *cmdtp, int flag, int argc,
+			   char *const argv[])
+{
+	bool probe;
+
+	probe = argc >= 2 && !strcmp(argv[1], "-p");
+	bootdev_list(probe);
+
+	return 0;
+}
+
+static int do_bootdev_select(struct cmd_tbl *cmdtp, int flag, int argc,
+			     char *const argv[])
+{
+	struct bootstd_priv *std;
+	struct udevice *dev;
+	int ret;
+
+	ret = bootstd_get_priv(&std);
+	if (ret)
+		return CMD_RET_FAILURE;
+	if (argc < 2) {
+		std->cur_bootdev = NULL;
+		return 0;
+	}
+	if (bootdev_find_by_any(argv[1], &dev))
+		return CMD_RET_FAILURE;
+
+	std->cur_bootdev = dev;
+
+	return 0;
+}
+
+static int do_bootdev_info(struct cmd_tbl *cmdtp, int flag, int argc,
+			   char *const argv[])
+{
+	struct bootstd_priv *priv;
+	struct bootflow *bflow;
+	int ret, i, num_valid;
+	struct udevice *dev;
+	bool probe;
+
+	probe = argc >= 2 && !strcmp(argv[1], "-p");
+
+	ret = bootdev_check_state(&priv);
+	if (ret)
+		return CMD_RET_FAILURE;
+
+	dev = priv->cur_bootdev;
+
+	/* Count the number of bootflows, including how many are valid*/
+	num_valid = 0;
+	for (ret = bootdev_first_bootflow(dev, &bflow), i = 0;
+	     !ret;
+	     ret = bootdev_next_bootflow(&bflow), i++)
+		num_valid += bflow->state == BOOTFLOWST_READY;
+
+	/*
+	 * Prove the device, if requested, otherwise assume that there is no
+	 * error
+	 */
+	ret = 0;
+	if (probe)
+		ret = device_probe(dev);
+
+	printf("Name:      %s\n", dev->name);
+	printf("Sequence:  %d\n", dev_seq(dev));
+	printf("Status:    %s\n", ret ? simple_itoa(ret) : device_active(dev) ?
+		"Probed" : "OK");
+	printf("Uclass:    %s\n", dev_get_uclass_name(dev_get_parent(dev)));
+	printf("Bootflows: %d (%d valid)\n", i, num_valid);
+
+	return 0;
+}
+
+#ifdef CONFIG_SYS_LONGHELP
+static char bootdev_help_text[] =
+	"list [-p]      - list all available bootdevs (-p to probe)\n"
+	"bootdev select <bd>    - select a bootdev by name | label | seq\n"
+	"bootdev info [-p]      - show information about a bootdev (-p to probe)";
+#endif
+
+U_BOOT_CMD_WITH_SUBCMDS(bootdev, "Boot devices", bootdev_help_text,
+	U_BOOT_SUBCMD_MKENT(list, 2, 1, do_bootdev_list),
+	U_BOOT_SUBCMD_MKENT(select, 2, 1, do_bootdev_select),
+	U_BOOT_SUBCMD_MKENT(info, 2, 1, do_bootdev_info));

configs/rcar3_salvator-x_defconfig

@@ -14,6 +14,7 @@ CONFIG_SYS_LOAD_ADDR=0x58000000
 CONFIG_LTO=y
 CONFIG_REMAKE_ELF=y
 CONFIG_FIT=y
+# CONFIG_BOOTSTD is not set
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_SYS_MONITOR_BASE=0x00000000
 CONFIG_USE_BOOTARGS=y

configs/tbs2910_defconfig

@@ -17,6 +17,7 @@ CONFIG_SYS_MEMTEST_END=0x2f400000
 CONFIG_LTO=y
 CONFIG_HAS_BOARD_SIZE_LIMIT=y
 CONFIG_BOARD_SIZE_LIMIT=392192
+# CONFIG_BOOTSTD is not set
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTCOMMAND=y