kernel/drivers/gpu/nova-core/falcon.rs, branch linux-6.19.y

gpu: nova-core: check for overflow to DMATRFBASE1

2026-02-26T23:01:00Z

[ Upstream commit 5cf76277cdec872aef9ff2e9008ae129bb303787 ] The NV_PFALCON_FALCON_DMATRFBASE/1 register pair supports DMA addresses up to 49 bits only, but the write to DMATRFBASE1 could exceed that. To mitigate, check first that the DMA address will fit. Reviewed-by: John Hubbard Reviewed-by: Joel Fernandes Fixes: 69f5cd67ce41 ("gpu: nova-core: add falcon register definitions and base code") Signed-off-by: Timur Tabi Link: https://patch.msgid.link/20260107201647.2490140-1-ttabi@nvidia.com [ Import ::kernel::dma::DmaMask. - Danilo ] Signed-off-by: Danilo Krummrich Signed-off-by: Sasha Levin

gpu: nova-core: falcon: Move dma_reset functionality into helper

2025-11-15T11:08:49Z

Move dma_reset so we can use it for the upcoming sequencer functionality. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251114195552.739371-5-joelagnelf@nvidia.com>

gpu: nova-core: falcon: Move mbox functionalities into helper

2025-11-15T11:08:49Z

Move falcon reading/writing to mbox functionality into helper so we can use it from the sequencer resume flow. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes [acourbot@nvidia.com: make write/read mailbox methods unfallible.] Signed-off-by: Alexandre Courbot Message-ID: <20251114195552.739371-4-joelagnelf@nvidia.com>

gpu: nova-core: falcon: Move start functionality into separate helper

2025-11-15T08:28:03Z

Move start functionality into a separate helper so we can use it from the sequencer. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251114195552.739371-3-joelagnelf@nvidia.com>

gpu: nova-core: falcon: Move waiting until halted to a helper

2025-11-15T08:28:03Z

Move the "waiting until halted" functionality into a helper so that we can use it in the sequencer, which is a separate sequencer operation. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251114195552.739371-2-joelagnelf@nvidia.com>

gpu: nova-core: gsp: Boot GSP

2025-11-14T11:25:57Z

Boot the GSP to the RISC-V active state. Completing the boot requires running the CPU sequencer which will be added in a future commit. Reviewed-by: Lyude Paul Signed-off-by: Alistair Popple Signed-off-by: Alexandre Courbot Message-ID: <20251110-gsp_boot-v9-15-8ae4058e3c0e@nvidia.com>

gpu: nova-core: falcon: Add support to write firmware version

2025-11-14T11:25:57Z

This will be needed by both the GSP boot code as well as GSP resume code in the sequencer. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251110-gsp_boot-v9-14-8ae4058e3c0e@nvidia.com>

gpu: nova-core: falcon: Add support to check if RISC-V is active

2025-11-14T11:25:57Z

Add definition for RISCV_CPUCTL register and use it in a new falcon API to check if the RISC-V core of a Falcon is active. It is required by the sequencer to know if the GSP's RISCV processor is active. Reviewed-by: Lyude Paul Signed-off-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251110-gsp_boot-v9-13-8ae4058e3c0e@nvidia.com>

gpu: nova-core: justify remaining uses of `as`

2025-11-07T23:22:51Z

There are a few remaining cases where we *do* want to use `as`, because we specifically want to strip the data that does not fit into the destination type. Comment these uses to clear confusion about the intent. Acked-by: Danilo Krummrich [acourbot@nvidia.com: fix merge conflicts after rebase.] Signed-off-by: Alexandre Courbot Message-ID: <20251029-nova-as-v3-6-6a30c7333ad9@nvidia.com>

gpu: nova-core: replace use of `as` with functions from `num`

2025-11-07T23:22:45Z

Use the newly-introduced `num` module to replace the use of `as` wherever it is safe to do. This ensures that a given conversion cannot lose data if its source or destination type ever changes. Acked-by: Danilo Krummrich [acourbot@nvidia.com: fix merge conflicts after rebase.] Signed-off-by: Alexandre Courbot Message-ID: <20251029-nova-as-v3-5-6a30c7333ad9@nvidia.com>