diff options
Diffstat (limited to 'drivers/gpu/nova-core/fb/hal/ga100.rs')
| -rw-r--r-- | drivers/gpu/nova-core/fb/hal/ga100.rs | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/gpu/nova-core/fb/hal/ga100.rs b/drivers/gpu/nova-core/fb/hal/ga100.rs index 871c42bf033a..e0acc41aa7cd 100644 --- a/drivers/gpu/nova-core/fb/hal/ga100.rs +++ b/drivers/gpu/nova-core/fb/hal/ga100.rs @@ -1,15 +1,17 @@ // SPDX-License-Identifier: GPL-2.0 -struct Ga100; - use kernel::prelude::*; -use crate::driver::Bar0; -use crate::fb::hal::FbHal; -use crate::regs; +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(regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::read(bar).adr_39_08()) << FLUSH_SYSMEM_ADDR_SHIFT | u64::from(regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI::read(bar).adr_63_40()) @@ -18,9 +20,13 @@ pub(super) fn read_sysmem_flush_page_ga100(bar: &Bar0) -> u64 { pub(super) fn write_sysmem_flush_page_ga100(bar: &Bar0, addr: u64) { regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR_HI::default() + // CAST: `as u32` is used on purpose since the remaining bits are guaranteed to fit within + // a `u32`. .set_adr_63_40((addr >> FLUSH_SYSMEM_ADDR_SHIFT_HI) as u32) .write(bar); regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::default() + // 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`. .set_adr_39_08((addr >> FLUSH_SYSMEM_ADDR_SHIFT) as u32) .write(bar); } |