Signed-off-by: Jason Wang
---
drivers/virtio/Kconfig | 10 +-
drivers/virtio/Makefile| 1 +
drivers/virtio/virtio_pci_common.h | 27 +-
drivers/virtio/virtio_pci_modern.c | 617 -
drivers/virtio/virtio_pci_modern_dev.c | 599
include/linux/virtio_pci_modern.h | 111 +
6 files changed, 721 insertions(+), 644 deletions(-)
create mode 100644 drivers/virtio/virtio_pci_modern_dev.c
create mode 100644 include/linux/virtio_pci_modern.h
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 7b41130d3f35..d1a6bd2a975f 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -12,6 +12,14 @@ config ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
This option is selected if the architecture may need to enforce
VIRTIO_F_ACCESS_PLATFORM
+config VIRTIO_PCI_MODERN
+ tristate "Modern Virtio PCI Device"
+ depends on PCI
+ help
+ Modern PCI device implementation. This module implement the
+ basic probe and control for devices which is based on modern
+ PCI device with possible vendor specific extensions.
+
menuconfig VIRTIO_MENU
bool "Virtio drivers"
default y
@@ -20,7 +28,7 @@ if VIRTIO_MENU
config VIRTIO_PCI
tristate "PCI driver for virtio devices"
- depends on PCI
+ depends on VIRTIO_PCI_MODERN
select VIRTIO
help
This driver provides support for virtio based paravirtual device
diff --git a/drivers/virtio/Makefile b/drivers/virtio/Makefile
index 591e6f72aa54..f097578aaa8f 100644
--- a/drivers/virtio/Makefile
+++ b/drivers/virtio/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_VIRTIO) += virtio.o virtio_ring.o
+obj-$(CONFIG_VIRTIO_PCI_MODERN) += virtio_pci_modern_dev.o
obj-$(CONFIG_VIRTIO_MMIO) += virtio_mmio.o
obj-$(CONFIG_VIRTIO_PCI) += virtio_pci.o
virtio_pci-y := virtio_pci_modern.o virtio_pci_common.o
diff --git a/drivers/virtio/virtio_pci_common.h
b/drivers/virtio/virtio_pci_common.h
index f35ff5b6b467..beec047a8f8d 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -25,6 +25,7 @@
#include
#include
#include
+#include
#include
#include
@@ -39,32 +40,6 @@ struct virtio_pci_vq_info {
unsigned msix_vector;
};
-struct virtio_pci_modern_device {
- struct pci_dev *pci_dev;
-
- struct virtio_pci_common_cfg __iomem *common;
- /* Device-specific data (non-legacy mode) */
- void __iomem *device;
- /* Base of vq notifications (non-legacy mode). */
- void __iomem *notify_base;
- /* Where to read and clear interrupt */
- u8 __iomem *isr;
-
- /* So we can sanity-check accesses. */
- size_t notify_len;
- size_t device_len;
-
- /* Capability for when we need to map notifications per-vq. */
- int notify_map_cap;
-
- /* Multiply queue_notify_off by this value. (non-legacy mode). */
- u32 notify_offset_multiplier;
-
- int modern_bars;
-
- struct virtio_device_id id;
-};
-
/* Our device structure */
struct virtio_pci_device {
struct virtio_device vdev;
diff --git a/drivers/virtio/virtio_pci_modern.c
b/drivers/virtio/virtio_pci_modern.c
index a5e3a5e40323..fbd4ebc00eb6 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -19,158 +19,6 @@
#define VIRTIO_RING_NO_LEGACY
#include "virtio_pci_common.h"
-/*
- * Type-safe wrappers for io accesses.
- * Use these to enforce at compile time the following spec requirement:
- *
- * The driver MUST access each field using the “natural” access
- * method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses
- * for 16-bit fields and 8-bit accesses for 8-bit fields.
- */
-static inline u8 vp_ioread8(const u8 __iomem *addr)
-{
- return ioread8(addr);
-}
-static inline u16 vp_ioread16 (const __le16 __iomem *addr)
-{
- return ioread16(addr);
-}
-
-static inline u32 vp_ioread32(const __le32 __iomem *addr)
-{
- return ioread32(addr);
-}
-
-static inline void vp_iowrite8(u8 value, u8 __iomem *addr)
-{
- iowrite8(value, addr);
-}
-
-static inline void vp_iowrite16(u16 value, __le16 __iomem *addr)
-{
- iowrite16(value, addr);
-}
-
-static inline void vp_iowrite32(u32 value, __le32 __iomem *addr)
-{
- iowrite32(value, addr);
-}
-
-static void vp_iowrite64_twopart(u64 val,
-__le32 __iomem *lo, __le32 __iomem *hi)
-{
- vp_iowrite32((u32)val, lo);
- vp_iowrite32(val >> 32, hi);
-}
-
-/*
- * vp_modern_map_capability - map a part of virtio pci capability
- * @mdev: the modern virtio-pci device
- * @off: offset of the capability
- * @minlen: minimal length of the capability
- * @align: align requirement
- * @start: start from the capability
- * @size: map size
- * @len: the length that is actually mapped
- *
- * Returns the io address of for
