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[Qemu-devel] [PATCH v2 10/22] virtio: add read/write functions and macro
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH v2 10/22] virtio: add read/write functions and macros |
Date: |
Tue, 30 Jun 2015 10:39:01 +0200 |
Add macros to read/write virtio registers.
Signed-off-by: Gerd Hoffmann <address@hidden>
---
src/hw/virtio-pci.h | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/src/hw/virtio-pci.h b/src/hw/virtio-pci.h
index a04d38b..a092e86 100644
--- a/src/hw/virtio-pci.h
+++ b/src/hw/virtio-pci.h
@@ -127,6 +127,92 @@ struct vp_device {
struct vp_cap common, notify, isr, device, legacy;
};
+static inline u64 _vp_read(struct vp_cap *cap, u32 offset, u8 size)
+{
+ u32 addr = cap->addr + offset;
+ u64 var;
+
+ if (cap->is_io) {
+ switch (size) {
+ case 8:
+ var = inl(addr);
+ var |= (u64)inl(addr+4) << 32;
+ break;
+ case 4:
+ var = inl(addr);
+ break;
+ case 2:
+ var = inw(addr);
+ break;
+ case 1:
+ var = inb(addr);
+ break;
+ default:
+ var = 0;
+ }
+ } else {
+ switch (size) {
+ case 8:
+ var = readl((void*)addr);
+ var |= (u64)readl((void*)(addr+4)) << 32;
+ break;
+ case 4:
+ var = readl((void*)addr);
+ break;
+ case 2:
+ var = readw((void*)addr);
+ break;
+ case 1:
+ var = readb((void*)addr);
+ break;
+ default:
+ var = 0;
+ }
+ }
+ dprintf(9, "vp read %x (%d) -> 0x%llx\n", addr, size, var);
+ return var;
+}
+
+static inline void _vp_write(struct vp_cap *cap, u32 offset, u8 size, u64 var)
+{
+ u32 addr = cap->addr + offset;
+
+ dprintf(9, "vp write %x (%d) <- 0x%llx\n", addr, size, var);
+ if (cap->is_io) {
+ switch (size) {
+ case 4:
+ outl(var, addr);
+ break;
+ case 2:
+ outw(var, addr);
+ break;
+ case 1:
+ outb(var, addr);
+ break;
+ }
+ } else {
+ switch (size) {
+ case 4:
+ writel((void*)addr, var);
+ break;
+ case 2:
+ writew((void*)addr, var);
+ break;
+ case 1:
+ writeb((void*)addr, var);
+ break;
+ }
+ }
+}
+
+#define vp_read(_cap, _struct, _field) \
+ _vp_read(_cap, offsetof(_struct, _field), \
+ sizeof(((_struct *)0)->_field))
+
+#define vp_write(_cap, _struct, _field, _var) \
+ _vp_write(_cap, offsetof(_struct, _field), \
+ sizeof(((_struct *)0)->_field), _var)
+
static inline u32 vp_get_features(struct vp_device *vp)
{
return inl(GET_LOWFLAT(vp->ioaddr) + VIRTIO_PCI_HOST_FEATURES);
--
1.8.3.1
- [Qemu-devel] [PATCH v2 00/22] virtio: add version 1.0 support, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 01/22] pci: allow to loop over capabilities, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 02/22] virtio: run drivers in 32bit mode, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 10/22] virtio: add read/write functions and macros,
Gerd Hoffmann <=
- [Qemu-devel] [PATCH v2 08/22] virtio: create vp_cap struct for legacy bar, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 06/22] virtio: add version 0.9.5 struct, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 04/22] virtio: pass struct pci_device to vp_init_simple, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 09/22] virtio: add version 0.9.5 struct [fixup], Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 12/22] virtio: add version 1.0 support to vp_{get, set}_status, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 13/22] virtio: add version 1.0 support to vp_get_isr, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 16/22] virtio: remove unused vp_del_vq, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 14/22] virtio: add version 1.0 support to vp_reset, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 11/22] virtio: make features 64bit, support version 1.0 features, Gerd Hoffmann, 2015/06/30
- [Qemu-devel] [PATCH v2 18/22] virtio-scsi: fix initialization for version 1.0, Gerd Hoffmann, 2015/06/30