ga100.rs

 1// SPDX-License-Identifier: GPL-2.0
 2
 3use kernel::prelude::*;
 4
 5use crate::{
 6    driver::Bar0,
 7    fb::hal::FbHal,
 8    regs, //
 9};
10
11use super::tu102::FLUSH_SYSMEM_ADDR_SHIFT;
12
13struct Ga100;
14
15pub(super) fn read_sysmem_flush_page_ga100(bar: &Bar0) -> u64 {
16    u64::from(regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::read(bar).adr_39_08()) << FLUSH_SYSMEM_ADDR_SHIFT
17        | u64::from(regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI::read(bar).adr_63_40())
18            << FLUSH_SYSMEM_ADDR_SHIFT_HI
19}
20
21pub(super) fn write_sysmem_flush_page_ga100(bar: &Bar0, addr: u64) {
22    regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI::default()
23        // CAST: `as u32` is used on purpose since the remaining bits are guaranteed to fit within
24        // a `u32`.
25        .set_adr_63_40((addr >> FLUSH_SYSMEM_ADDR_SHIFT_HI) as u32)
26        .write(bar);
27    regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::default()
28        // CAST: `as u32` is used on purpose since we want to strip the upper bits that have been
29        // written to `NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI`.
30        .set_adr_39_08((addr >> FLUSH_SYSMEM_ADDR_SHIFT) as u32)
31        .write(bar);
32}
33
34pub(super) fn display_enabled_ga100(bar: &Bar0) -> bool {
35    !regs::ga100::NV_FUSE_STATUS_OPT_DISPLAY::read(bar).display_disabled()
36}
37
38/// Shift applied to the sysmem address before it is written into
39/// `NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI`,
40const FLUSH_SYSMEM_ADDR_SHIFT_HI: u32 = 40;
41
42impl FbHal for Ga100 {
43    fn read_sysmem_flush_page(&self, bar: &Bar0) -> u64 {
44        read_sysmem_flush_page_ga100(bar)
45    }
46
47    fn write_sysmem_flush_page(&self, bar: &Bar0, addr: u64) -> Result {
48        write_sysmem_flush_page_ga100(bar, addr);
49
50        Ok(())
51    }
52
53    fn supports_display(&self, bar: &Bar0) -> bool {
54        display_enabled_ga100(bar)
55    }
56
57    fn vidmem_size(&self, bar: &Bar0) -> u64 {
58        super::tu102::vidmem_size_gp102(bar)
59    }
60}
61
62const GA100: Ga100 = Ga100;
63pub(super) const GA100_HAL: &dyn FbHal = &GA100;