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virtio: mmio: Allow instantiation via platform data

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The m68k QEMU virt machine doesn't use devicetree, yet, so
allow it to create virtio-mmio instances via platform data.

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Reviewed-by: Angelo Dureghello <angelo@kernel-space.org>
Signed-off-by: Daniel Palmer <daniel@thingy.jp>
This commit is contained in:
Daniel Palmer
2026-05-22 16:47:54 -06:00
committed by Tom Rini
parent 3e2b261647
commit 009cd5b56d
2 changed files with 30 additions and 9 deletions
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drivers/virtio/virtio_mmio.c
+18 -9
View File
@@ -12,6 +12,7 @@
#include <virtio_types.h>
#include <virtio.h>
#include <virtio_ring.h>
#include <virtio_mmio.h>
#include <linux/bug.h>
#include <linux/compat.h>
#include <linux/err.h>
@@ -335,21 +336,28 @@ static int virtio_mmio_notify(struct udevice *udev, struct virtqueue *vq)
static int virtio_mmio_of_to_plat(struct udevice *udev)
{
struct virtio_mmio_priv *priv = dev_get_priv(udev);
struct virtio_mmio_plat *plat = dev_get_plat(udev);
fdt_addr_t addr;
priv->base = (void __iomem *)(ulong)dev_read_addr(udev);
if (priv->base == (void __iomem *)FDT_ADDR_T_NONE)
addr = dev_read_addr(udev);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
plat->base = addr;
return 0;
}
static int virtio_mmio_probe(struct udevice *udev)
{
struct virtio_mmio_plat *plat = dev_get_plat(udev);
struct virtio_mmio_priv *priv = dev_get_priv(udev);
struct virtio_dev_priv *uc_priv = dev_get_uclass_priv(udev);
u32 magic;
priv->base = (void __iomem *)(uintptr_t)plat->base;
/* Check magic value */
magic = readl(priv->base + VIRTIO_MMIO_MAGIC_VALUE);
if (magic != ('v' | 'i' << 8 | 'r' << 16 | 't' << 24)) {
@@ -405,11 +413,12 @@ static const struct udevice_id virtio_mmio_ids[] = {
};
U_BOOT_DRIVER(virtio_mmio) = {
.name = "virtio-mmio",
.id = UCLASS_VIRTIO,
.of_match = virtio_mmio_ids,
.ops = &virtio_mmio_ops,
.probe = virtio_mmio_probe,
.name = "virtio-mmio",
.id = UCLASS_VIRTIO,
.of_match = virtio_mmio_ids,
.ops = &virtio_mmio_ops,
.probe = virtio_mmio_probe,
.of_to_plat = virtio_mmio_of_to_plat,
.priv_auto = sizeof(struct virtio_mmio_priv),
.priv_auto = sizeof(struct virtio_mmio_priv),
.plat_auto = sizeof(struct virtio_mmio_plat),
};
include/virtio_mmio.h
+12
View File
@@ -0,0 +1,12 @@
/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef __VIRTIO_MMIO_H__
#define __VIRTIO_MMIO_H__
#include <linux/types.h>
struct virtio_mmio_plat {
phys_addr_t base;
};
#endif /* __VIRTIO_MMIO_H__ */