[J-u-boot.git] / cmd / virtio.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018, Tuomas Tynkkynen <[email protected]>
 * Copyright (C) 2018, Bin Meng <[email protected]>
 */

#include <common.h>
#include <blk.h>
#include <command.h>
#include <dm.h>
#include <virtio_types.h>
#include <virtio.h>

static int virtio_curr_dev;

static int do_virtio(struct cmd_tbl *cmdtp, int flag, int argc,
		     char *const argv[])
{
	if (argc == 2 && !strcmp(argv[1], "scan")) {
		/*
		 * make sure all virtio devices are enumerated.
		 * Do the same as virtio_init(), but also call
		 * device_probe() for children (i.e. virtio devices)
		 */
		struct udevice *bus, *child;
		int ret;

		ret = uclass_first_device(UCLASS_VIRTIO, &bus);
		if (ret)
			return CMD_RET_FAILURE;

		while (bus) {
			device_foreach_child_probe(child, bus)
				;
			ret = uclass_next_device(&bus);
			if (ret)
				break;
		}

		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'"
);
Commit	Line	Data
78e12901 TT	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Copyright (C) 2018, Tuomas Tynkkynen <[email protected]>
	4	* Copyright (C) 2018, Bin Meng <[email protected]>
	5	*/
	6
	7	#include <common.h>
e6f6f9e6	8	#include <blk.h>
78e12901 TT	9	#include <command.h>
	10	#include <dm.h>
	11	#include <virtio_types.h>
	12	#include <virtio.h>
	13
	14	static int virtio_curr_dev;
	15
09140113 SG	16	static int do_virtio(struct cmd_tbl *cmdtp, int flag, int argc,
09140113 SG	17	char *const argv[])
78e12901 TT	18	{
78e12901 TT	19	if (argc == 2 && !strcmp(argv[1], "scan")) {
75a9d750 AT	20	/*
	21	* make sure all virtio devices are enumerated.
	22	* Do the same as virtio_init(), but also call
	23	* device_probe() for children (i.e. virtio devices)
	24	*/
	25	struct udevice bus, child;
	26	int ret;
	27
	28	ret = uclass_first_device(UCLASS_VIRTIO, &bus);
	29	if (ret)
	30	return CMD_RET_FAILURE;
	31
	32	while (bus) {
	33	device_foreach_child_probe(child, bus)
	34	;
	35	ret = uclass_next_device(&bus);
	36	if (ret)
	37	break;
	38	}
78e12901 TT	39
	40	return CMD_RET_SUCCESS;
	41	}
	42
	43	return blk_common_cmd(argc, argv, IF_TYPE_VIRTIO, &virtio_curr_dev);
	44	}
	45
	46	U_BOOT_CMD(
	47	virtio, 8, 1, do_virtio,
	48	"virtio block devices sub-system",
	49	"scan - initialize virtio bus\n"
	50	"virtio info - show all available virtio block devices\n"
	51	"virtio device [dev] - show or set current virtio block device\n"
	52	"virtio part [dev] - print partition table of one or all virtio block devices\n"
	53	"virtio read addr blk# cnt - read `cnt' blocks starting at block\n"
	54	" `blk#' to memory address `addr'\n"
	55	"virtio write addr blk# cnt - write `cnt' blocks starting at block\n"
	56	" `blk#' from memory address `addr'"
	57	);