1 // SPDX-License-Identifier: GPL-2.0 2 3 use crate::driver::Bar0; 4 use crate::fb::hal::FbHal; 5 use crate::regs; 6 use kernel::prelude::*; 7 8 /// Shift applied to the sysmem address before it is written into `NV_PFB_NISO_FLUSH_SYSMEM_ADDR`, 9 /// to be used by HALs. 10 pub(super) const FLUSH_SYSMEM_ADDR_SHIFT: u32 = 8; 11 12 pub(super) fn read_sysmem_flush_page_gm107(bar: &Bar0) -> u64 { 13 (regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::read(bar).adr_39_08() as u64) << FLUSH_SYSMEM_ADDR_SHIFT 14 } 15 16 pub(super) fn write_sysmem_flush_page_gm107(bar: &Bar0, addr: u64) -> Result { 17 // Check that the address doesn't overflow the receiving 32-bit register. 18 if addr >> (u32::BITS + FLUSH_SYSMEM_ADDR_SHIFT) == 0 { 19 regs::NV_PFB_NISO_FLUSH_SYSMEM_ADDR::default() 20 .set_adr_39_08((addr >> FLUSH_SYSMEM_ADDR_SHIFT) as u32) 21 .write(bar); 22 23 Ok(()) 24 } else { 25 Err(EINVAL) 26 } 27 } 28 29 struct Tu102; 30 31 impl FbHal for Tu102 { 32 fn read_sysmem_flush_page(&self, bar: &Bar0) -> u64 { 33 read_sysmem_flush_page_gm107(bar) 34 } 35 36 fn write_sysmem_flush_page(&self, bar: &Bar0, addr: u64) -> Result { 37 write_sysmem_flush_page_gm107(bar, addr) 38 } 39 } 40 41 const TU102: Tu102 = Tu102; 42 pub(super) const TU102_HAL: &dyn FbHal = &TU102; 43