[U-Boot] [PATCH v2 16/31] virtio: cmd: Add virtio command for virtio devices
Bin Meng
bmeng.cn at gmail.com
Sun Oct 14 13:06:40 UTC 2018
From: Tuomas Tynkkynen <tuomas.tynkkynen at iki.fi>
Add 'virtio' command in U-Boot command line.
Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen at iki.fi>
Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Changes in v2: None
cmd/Kconfig | 7 +++++++
cmd/Makefile | 1 +
cmd/virtio.c | 38 ++++++++++++++++++++++++++++++++++++++
3 files changed, 46 insertions(+)
create mode 100644 cmd/virtio.c
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 7ed3c9c..2fbdb17 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1065,6 +1065,13 @@ config CMD_USB_MASS_STORAGE
help
USB mass storage support
+config CMD_VIRTIO
+ bool "virtio"
+ depends on VIRTIO
+ default y if VIRTIO
+ help
+ VirtIO block device support
+
config CMD_AXI
bool "axi"
depends on AXI
diff --git a/cmd/Makefile b/cmd/Makefile
index d9cdaf6..2e27514 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -136,6 +136,7 @@ obj-$(CONFIG_CMD_UBI) += ubi.o
obj-$(CONFIG_CMD_UBIFS) += ubifs.o
obj-$(CONFIG_CMD_UNIVERSE) += universe.o
obj-$(CONFIG_CMD_UNZIP) += unzip.o
+obj-$(CONFIG_CMD_VIRTIO) += virtio.o
obj-$(CONFIG_CMD_LZMADEC) += lzmadec.o
obj-$(CONFIG_CMD_USB) += usb.o disk.o
diff --git a/cmd/virtio.c b/cmd/virtio.c
new file mode 100644
index 0000000..b7082bc
--- /dev/null
+++ b/cmd/virtio.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Tuomas Tynkkynen <tuomas.tynkkynen at iki.fi>
+ * Copyright (C) 2018, Bin Meng <bmeng.cn at gmail.com>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <dm.h>
+#include <virtio_types.h>
+#include <virtio.h>
+
+static int virtio_curr_dev;
+
+static int do_virtio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ if (argc == 2 && !strcmp(argv[1], "scan")) {
+ /* make sure all virtio devices are enumerated */
+ virtio_init();
+
+ return CMD_RET_SUCCESS;
+ }
+
+ return blk_common_cmd(argc, argv, IF_TYPE_VIRTIO, &virtio_curr_dev);
+}
+
+U_BOOT_CMD(
+ virtio, 8, 1, do_virtio,
+ "virtio block devices sub-system",
+ "scan - initialize virtio bus\n"
+ "virtio info - show all available virtio block devices\n"
+ "virtio device [dev] - show or set current virtio block device\n"
+ "virtio part [dev] - print partition table of one or all virtio block devices\n"
+ "virtio read addr blk# cnt - read `cnt' blocks starting at block\n"
+ " `blk#' to memory address `addr'\n"
+ "virtio write addr blk# cnt - write `cnt' blocks starting at block\n"
+ " `blk#' from memory address `addr'"
+);
--
2.7.4
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