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// SPDX-License-Identifier: GPL-2.0
use kernel::{
io::Io,
num::Bounded,
prelude::*, //
};
use crate::{
driver::Bar0,
fb::hal::FbHal,
regs, //
};
use super::tu102::FLUSH_SYSMEM_ADDR_SHIFT;
struct Ga100;
pub(super) fn read_sysmem_flush_page_ga100(bar: &Bar0) -> u64 {
u64::from(bar.read(regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR).adr_39_08()) << FLUSH_SYSMEM_ADDR_SHIFT
| u64::from(bar.read(regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI).adr_63_40())
<< FLUSH_SYSMEM_ADDR_SHIFT_HI
}
pub(super) fn write_sysmem_flush_page_ga100(bar: &Bar0, addr: u64) {
bar.write_reg(
regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI::zeroed().with_adr_63_40(
Bounded::<u64, _>::from(addr)
.shr::<FLUSH_SYSMEM_ADDR_SHIFT_HI, _>()
.cast(),
),
);
bar.write_reg(
regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::zeroed()
// CAST: `as u32` is used on purpose since we want to strip the upper bits that have
// been written to `NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI`.
.with_adr_39_08((addr >> FLUSH_SYSMEM_ADDR_SHIFT) as u32),
);
}
pub(super) fn display_enabled_ga100(bar: &Bar0) -> bool {
!bar.read(regs::ga100::NV_FUSE_STATUS_OPT_DISPLAY)
.display_disabled()
}
/// Shift applied to the sysmem address before it is written into
/// `NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI`,
const FLUSH_SYSMEM_ADDR_SHIFT_HI: u32 = 40;
impl FbHal for Ga100 {
fn read_sysmem_flush_page(&self, bar: &Bar0) -> u64 {
read_sysmem_flush_page_ga100(bar)
}
fn write_sysmem_flush_page(&self, bar: &Bar0, addr: u64) -> Result {
write_sysmem_flush_page_ga100(bar, addr);
Ok(())
}
fn supports_display(&self, bar: &Bar0) -> bool {
display_enabled_ga100(bar)
}
fn vidmem_size(&self, bar: &Bar0) -> u64 {
super::tu102::vidmem_size_gp102(bar)
}
}
const GA100: Ga100 = Ga100;
pub(super) const GA100_HAL: &dyn FbHal = &GA100;
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