/*! Remaps the frame buffer if necessary; if we've already mapped the complete
frame buffer, there is no need to map it again.
*/
static status_t
remap_frame_buffer(vesa_info& info, addr_t physicalBase, uint32 width,
uint32 height, int8 depth, uint32 bytesPerRow, bool initializing)
{
vesa_shared_info& sharedInfo = *info.shared_info;
addr_t frameBuffer = info.frame_buffer;
if (!info.complete_frame_buffer_mapped) {
addr_t base = physicalBase;
size_t size = bytesPerRow * height;
bool remap = !initializing;
if (info.physical_frame_buffer_size != 0) {
// we can map the complete frame buffer
base = info.physical_frame_buffer;
size = info.physical_frame_buffer_size;
remap = true;
}
if (remap) {
area_id area = map_physical_memory("vesa frame buffer", base,
size, B_ANY_KERNEL_ADDRESS, B_READ_AREA | B_WRITE_AREA,
(void**)&frameBuffer);
if (area < 0)
return area;
if (initializing) {
// We need to manually update the kernel's frame buffer address,
// since this frame buffer remapping has not been issued by the
// app_server (which would otherwise take care of this)
frame_buffer_update(frameBuffer, width, height, depth,
bytesPerRow);
}
delete_area(info.shared_info->frame_buffer_area);
info.frame_buffer = frameBuffer;
sharedInfo.frame_buffer_area = area;
// Turn on write combining for the area
vm_set_area_memory_type(area, base, B_MTR_WC);
if (info.physical_frame_buffer_size != 0)
info.complete_frame_buffer_mapped = true;
}
}
if (info.complete_frame_buffer_mapped)
frameBuffer += physicalBase - info.physical_frame_buffer;
// Update shared frame buffer information
sharedInfo.frame_buffer = (uint8*)frameBuffer;
sharedInfo.physical_frame_buffer = (uint8*)physicalBase;
sharedInfo.bytes_per_row = bytesPerRow;
return B_OK;
}
status_t init_driver()
{
LogFlowFunc(("init_driver\n"));
gLock.Init("VBoxVideo driver lock");
uint32 pciIndex = 0;
while (gPCI->get_nth_pci_info(pciIndex, &gDeviceInfo.pciInfo) == B_OK)
{
if (gDeviceInfo.pciInfo.vendor_id == VENDOR_ID && gDeviceInfo.pciInfo.device_id == DEVICE_ID)
{
sprintf(gDeviceInfo.name, "graphics/" DEVICE_FORMAT,
gDeviceInfo.pciInfo.vendor_id, gDeviceInfo.pciInfo.device_id,
gDeviceInfo.pciInfo.bus, gDeviceInfo.pciInfo.device, gDeviceInfo.pciInfo.function);
TRACE("found device %s\n", gDeviceInfo.name);
gCanHasDevice = true;
gDeviceInfo.openCount = 0;
size_t sharedSize = (sizeof(SharedInfo) + 7) & ~7;
gDeviceInfo.sharedArea = create_area("vboxvideo shared info",
(void **)&gDeviceInfo.sharedInfo, B_ANY_KERNEL_ADDRESS,
ROUND_TO_PAGE_SIZE(sharedSize), B_FULL_LOCK,
B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_USER_CLONEABLE_AREA);
uint16_t width, height, vwidth, bpp, flags;
VBoxVideoGetModeRegisters(&width, &height, &vwidth, &bpp, &flags);
gDeviceInfo.sharedInfo->currentMode.space = get_color_space_for_depth(bpp);
gDeviceInfo.sharedInfo->currentMode.virtual_width = width;
gDeviceInfo.sharedInfo->currentMode.virtual_height = height;
gDeviceInfo.sharedInfo->currentMode.h_display_start = 0;
gDeviceInfo.sharedInfo->currentMode.v_display_start = 0;
gDeviceInfo.sharedInfo->currentMode.flags = 0;
gDeviceInfo.sharedInfo->currentMode.timing.h_display = width;
gDeviceInfo.sharedInfo->currentMode.timing.v_display = height;
/* Not used, but this makes a reasonable-sounding refresh rate show in screen prefs: */
gDeviceInfo.sharedInfo->currentMode.timing.h_total = 1000;
gDeviceInfo.sharedInfo->currentMode.timing.v_total = 1;
gDeviceInfo.sharedInfo->currentMode.timing.pixel_clock = 850;
/* Map the PCI memory space */
uint32 command_reg = gPCI->read_pci_config(gDeviceInfo.pciInfo.bus,
gDeviceInfo.pciInfo.device, gDeviceInfo.pciInfo.function, PCI_command, 2);
command_reg |= PCI_command_io | PCI_command_memory | PCI_command_master;
gPCI->write_pci_config(gDeviceInfo.pciInfo.bus, gDeviceInfo.pciInfo.device,
gDeviceInfo.pciInfo.function, PCI_command, 2, command_reg);
gDeviceInfo.sharedInfo->framebufferArea = map_physical_memory("vboxvideo framebuffer",
(phys_addr_t)gDeviceInfo.pciInfo.u.h0.base_registers[0],
gDeviceInfo.pciInfo.u.h0.base_register_sizes[0], B_ANY_KERNEL_BLOCK_ADDRESS,
B_READ_AREA | B_WRITE_AREA, &(gDeviceInfo.sharedInfo->framebuffer));
vm_set_area_memory_type(gDeviceInfo.sharedInfo->framebufferArea,
(phys_addr_t)gDeviceInfo.pciInfo.u.h0.base_registers[0], B_MTR_WC);
break;
}
pciIndex++;
}
return B_OK;
}
