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dm/VBS-U: implement read/write callbacks of device-specific cfg 

This patch implements the read/write callbacks for the registers in the
device-specific region. This region is implemented in the modern MMIO
bar.

Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Reviewed-by: Hao Li <hao.l.li@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Jian Jun Chen 2018-03-29 12:09:09 +08:00 committed by Jack Ren
parent a098c11869
commit 1fa2f27dd3
1 changed files with 50 additions and 3 deletions
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53
devicemodel/hw/pci/virtio/virtio.c
View File

@ -1267,15 +1267,62 @@ virtio_isr_cfg_read(struct pci_vdev *dev, uint64_t offset, int size)
static uint32_t
virtio_device_cfg_read(struct pci_vdev *dev, uint64_t offset, int size)
{
/* TODO: to be implemented */
return 0;
struct virtio_base *base = dev->arg;
struct virtio_ops *vops;
const char *name;
uint32_t value;
uint64_t max;
int error;
vops = base->vops;
name = vops->name;
value = size == 1 ? 0xff : size == 2 ? 0xffff : 0xffffffff;
max = vops->cfgsize ? vops->cfgsize : 0x100000000;
if (offset + size > max) {
fprintf(stderr,
"%s: reading from 0x%lx size %d exceeds limit\r\n",
name, offset, size);
return value;
}
error = (*vops->cfgread)(DEV_STRUCT(base), offset, size, &value);
if (error) {
fprintf(stderr,
"%s: reading from 0x%lx size %d failed %d\r\n",
name, offset, size, error);
value = size == 1 ? 0xff : size == 2 ? 0xffff : 0xffffffff;
}
return value;
}
static void
virtio_device_cfg_write(struct pci_vdev *dev, uint64_t offset, int size,
uint64_t value)
{
/* TODO: to be implemented */
struct virtio_base *base = dev->arg;
struct virtio_ops *vops;
const char *name;
uint64_t max;
int error;
vops = base->vops;
name = vops->name;
max = vops->cfgsize ? vops->cfgsize : 0x100000000;
if (offset + size > max) {
fprintf(stderr,
"%s: writing to 0x%lx size %d exceeds limit\r\n",
name, offset, size);
return;
}
error = (*vops->cfgwrite)(DEV_STRUCT(base), offset, size, value);
if (error)
fprintf(stderr,
"%s: writing ot 0x%lx size %d failed %d\r\n",
name, offset, size, error);
}
/*