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This allows callers to know the full physical VRAM extent, not just the allocatable portion. Signed-off-by: Joel Fernandes --- drivers/gpu/nova-core/gsp/commands.rs | 6 ++++++ drivers/gpu/nova-core/gsp/fw/commands.rs | 7 +++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/nova-core/gsp/commands.rs b/drivers/gpu/nova-core/gsp/commands.rs index d18abd8b5f04..e42a865fd4ac 100644 --- a/drivers/gpu/nova-core/gsp/commands.rs +++ b/drivers/gpu/nova-core/gsp/commands.rs @@ -196,6 +196,9 @@ pub(crate) struct GetGspStaticInfoReply { /// Usable FB (VRAM) region for driver memory allocation. #[expect(dead_code)] pub(crate) usable_fb_region: Range, + /// End of VRAM. + #[expect(dead_code)] + pub(crate) total_fb_end: u64, } impl MessageFromGsp for GetGspStaticInfoReply { @@ -207,9 +210,12 @@ fn read( msg: &Self::Message, _sbuffer: &mut SBufferIter>, ) -> Result { + let total_fb_end = msg.total_fb_end().ok_or(ENODEV)?; + Ok(GetGspStaticInfoReply { gpu_name: msg.gpu_name_str(), usable_fb_region: msg.first_usable_fb_region().ok_or(ENODEV)?, + total_fb_end, }) } } diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs b/drivers/gpu/nova-core/gsp/fw/commands.rs index 3d5180e6b1e0..f2d59aa3131f 100644 --- a/drivers/gpu/nova-core/gsp/fw/commands.rs +++ b/drivers/gpu/nova-core/gsp/fw/commands.rs @@ -164,6 +164,13 @@ pub(crate) fn first_usable_fb_region(&self) -> Option> { } }) } + + /// Compute the end of physical VRAM from all FB regions. + pub(crate) fn total_fb_end(&self) -> Option { + self.fb_regions() + .filter_map(|reg| reg.limit.checked_add(1)) + .max() + } } // SAFETY: Padding is explicit and will not contain uninitialized data. -- 2.34.1