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dm: virtio-gpu: VGA compability support

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Legacy VGA & VBE interface as a common interface is supported by
many legacy and modern OS. Many installer of OS distribution use
this interface to display the GUI of installer when setup a refresh
new installation on bare-metal. Besides, Windows OS always use this
interface to display it's BSOD, recovery mode & safe mode GUI. It
is need because Windows don't include virtio-gpu driver as their
in-box driver, VGA interface will be used before the virtio-gpu
driver been installed.
To be compatiable with the PCI bar layout of legacy VGA, the layout
is refined to meet with the requirement of legacy VGA and modern
virtio-gpu.

BAR0: VGA Framebuffer memory, 16 MB in size.
BAR2: MMIO Space
  [0x0000~0x03ff] EDID data blob
  [0x0400~0x041f] VGA ioports registers
  [0x0500~0x0516] bochs display interface registers
  [0x1000~0x17ff] Virtio common configuration registers
  [0x1800~0x1fff] Virtio ISR state registers
  [0x2000~0x2fff] Virtio device configuration registers
  [0x3000~0x3fff] Virtio notification registers
BAR4: MSI/MSI-X
BAR5: Virtio port io

Tracked-On: #7210
Signed-off-by: Sun Peng <peng.p.sun@linux.intel.com>
Reviewed-by: Zhao, yakui <yakui.zhao@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
This commit is contained in:
Sun, Peng
2022-02-25 23:04:58 +08:00
committed by acrnsi-robot
parent f2cfa761ae
commit 1ed96bfbf8
12 changed files with 2082 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
devicemodel/include/virtio.h
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@@ -745,5 +745,22 @@ int virtio_set_modern_bar(struct virtio_base *base, bool use_notify_pio);
/**
* @}
*/
/* FIXME: Fix the assumption about the zero offset in virtio_pci_cap.
* Should not export the internal virtio APIs.
*/
void virtio_common_cfg_write(struct pci_vdev *dev,
uint64_t offset, int size, uint64_t value);
void virtio_device_cfg_write(struct pci_vdev *dev,
uint64_t offset, int size, uint64_t value);
void virtio_notify_cfg_write(struct pci_vdev *dev,
uint64_t offset, int size, uint64_t value);
uint32_t virtio_common_cfg_read(
struct pci_vdev *dev, uint64_t offset, int size);
uint32_t virtio_isr_cfg_read(
struct pci_vdev *dev, uint64_t offset, int size);
uint32_t virtio_device_cfg_read(
struct pci_vdev *dev, uint64_t offset, int size);
int virtio_set_modern_pio_bar(
struct virtio_base *base, int barnum);
#endif /* _VIRTIO_H_ */