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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/gpu.rs | 5 ++++- drivers/gpu/nova-core/gsp/commands.rs | 5 +++++ drivers/gpu/nova-core/gsp/fw/commands.rs | 7 +++++++ 3 files changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs index a0cb36cdeeea..a357a5e60613 100644 --- a/drivers/gpu/nova-core/gpu.rs +++ b/drivers/gpu/nova-core/gpu.rs @@ -9,7 +9,8 @@ io::Io, num::Bounded, pci, - prelude::*, // + prelude::*, + sizes::SizeConstants, // }; use crate::{ @@ -368,6 +369,8 @@ pub(crate) fn new( Err(e) => dev_warn!(pdev, "GPU name unavailable: {:?}\n", e), } + dev_info!(pdev, "Total VRAM: {} MiB\n", info.total_fb_end / u64::SZ_1M); + info } }) diff --git a/drivers/gpu/nova-core/gsp/commands.rs b/drivers/gpu/nova-core/gsp/commands.rs index d955f52a93bb..6623c7acf7cb 100644 --- a/drivers/gpu/nova-core/gsp/commands.rs +++ b/drivers/gpu/nova-core/gsp/commands.rs @@ -198,6 +198,8 @@ pub(crate) struct GetGspStaticInfoReply { /// Usable FB (VRAM) region for driver memory allocation. #[expect(dead_code)] pub(crate) usable_fb_region: Range, + /// End of VRAM. + pub(crate) total_fb_end: u64, } impl MessageFromGsp for GetGspStaticInfoReply { @@ -209,9 +211,12 @@ 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.usable_fb_regions_iter().next().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 d025167927df..64154b487c05 100644 --- a/drivers/gpu/nova-core/gsp/fw/commands.rs +++ b/drivers/gpu/nova-core/gsp/fw/commands.rs @@ -167,6 +167,13 @@ pub(crate) fn usable_fb_regions_iter(&self) -> impl Iterator> } }) } + + /// 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. -- 2.54.0