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charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260629-nova-bootcontext-v4-12-5539d8469590@nvidia.com> References: <20260629-nova-bootcontext-v4-0-5539d8469590@nvidia.com> In-Reply-To: <20260629-nova-bootcontext-v4-0-5539d8469590@nvidia.com> To: Danilo Krummrich , Alice Ryhl , David Airlie , Simona Vetter , Gary Guo , John Hubbard , Alistair Popple , Timur Tabi , Eliot Courtney , Zhi Wang Cc: nova-gpu@lists.linux.dev, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, Alexandre Courbot X-Mailer: b4 0.15.2 X-ClientProxiedBy: TYCP286CA0229.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:3c7::8) To CH2PR12MB3990.namprd12.prod.outlook.com (2603:10b6:610:28::18) Precedence: bulk X-Mailing-List: nova-gpu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PR12MB3990:EE_|CH3PR12MB8404:EE_ X-MS-Office365-Filtering-Correlation-Id: 286a0645-20d8-4122-a894-08ded5e83033 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|10070799003|1800799024|366016|23010399003|5023799004|11063799006|22082099003|18002099003|56012099006|921020; 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But these lifetimes are independent: the references captured by a `Falcon` remain valid for the GPU lifetime, while the context only borrows the `Falcon` for the duration of a boot or unload operation. This distinction is hidden for shared references by covariance, but cannot be ignored anymore if the context carries mutable references to GPU subdevices, as will happen for the `Fsp` and the `Falcon`s. Thus, give `GspBootContext` separate lifetimes for its subdevice borrows and the GPU resources captured by those subdevices, and update its users accordingly. Signed-off-by: Alexandre Courbot --- drivers/gpu/nova-core/gsp.rs | 19 ++++++++++++------- drivers/gpu/nova-core/gsp/boot.rs | 4 ++-- drivers/gpu/nova-core/gsp/hal.rs | 6 +++--- drivers/gpu/nova-core/gsp/hal/gh100.rs | 4 ++-- drivers/gpu/nova-core/gsp/hal/tu102.rs | 11 ++++++++--- drivers/gpu/nova-core/gsp/sequencer.rs | 2 +- 6 files changed, 28 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/nova-core/gsp.rs b/drivers/gpu/nova-core/gsp.rs index cad851e68685..c2d7a557310a 100644 --- a/drivers/gpu/nova-core/gsp.rs +++ b/drivers/gpu/nova-core/gsp.rs @@ -56,16 +56,21 @@ pub(crate) const GSP_PAGE_SIZE: usize = 1 << GSP_PAGE_SHIFT; /// Common context for the GSP boot process. -pub(crate) struct GspBootContext<'a> { - pub(crate) pdev: &'a pci::Device, - pub(crate) bar: Bar0<'a>, +/// +/// It carries two distinct lifetimes: +/// +/// - `'gpu` is the lifetime of the bound GPU device, as captured by the GPU subdevices. +/// - `'ctx` is a shorter lifetime during which this context borrows those subdevices. +pub(crate) struct GspBootContext<'ctx, 'gpu> { + pub(crate) pdev: &'gpu pci::Device, + pub(crate) bar: Bar0<'gpu>, pub(crate) chipset: Chipset, - pub(crate) gsp_falcon: &'a Falcon<'a, GspFalcon>, - pub(crate) sec2_falcon: &'a Falcon<'a, Sec2Falcon>, + pub(crate) gsp_falcon: &'ctx Falcon<'gpu, GspFalcon>, + pub(crate) sec2_falcon: &'ctx Falcon<'gpu, Sec2Falcon>, } -impl<'a> GspBootContext<'a> { - pub(crate) fn dev(&self) -> &'a device::Device { +impl<'ctx, 'gpu> GspBootContext<'ctx, 'gpu> { + pub(crate) fn dev(&self) -> &'gpu device::Device { self.pdev.as_ref() } } diff --git a/drivers/gpu/nova-core/gsp/boot.rs b/drivers/gpu/nova-core/gsp/boot.rs index f093e0215b66..c347558aa8e5 100644 --- a/drivers/gpu/nova-core/gsp/boot.rs +++ b/drivers/gpu/nova-core/gsp/boot.rs @@ -39,7 +39,7 @@ impl super::Gsp { /// [`Self::unload`]) returned. pub(crate) fn boot( self: Pin<&mut Self>, - mut ctx: super::GspBootContext<'_>, + mut ctx: super::GspBootContext<'_, '_>, ) -> Result> { let pdev = ctx.pdev; let bar = ctx.bar; @@ -125,7 +125,7 @@ fn shutdown_gsp( /// This stops all activity on the GSP. pub(crate) fn unload( &self, - mut ctx: super::GspBootContext<'_>, + mut ctx: super::GspBootContext<'_, '_>, unload_bundle: Option, ) -> Result { let dev = ctx.dev(); diff --git a/drivers/gpu/nova-core/gsp/hal.rs b/drivers/gpu/nova-core/gsp/hal.rs index a5d0da05ef5f..46428c623087 100644 --- a/drivers/gpu/nova-core/gsp/hal.rs +++ b/drivers/gpu/nova-core/gsp/hal.rs @@ -29,7 +29,7 @@ /// required for unloading is prepared at load time, and stored here until it needs to be run. pub(super) trait UnloadBundle: Send { /// Performs the steps required to properly reset the GSP after it has been stopped. - fn run(&self, ctx: &mut GspBootContext<'_>) -> Result; + fn run(&self, ctx: &mut GspBootContext<'_, '_>) -> Result; } /// Trait implemented by GSP HALs. @@ -41,7 +41,7 @@ pub(super) trait GspHal: Send { fn boot( &self, gsp: &Gsp, - ctx: &mut GspBootContext<'_>, + ctx: &mut GspBootContext<'_, '_>, fb_layout: &FbLayout, wpr_meta: &Coherent, ) -> Result>; @@ -53,7 +53,7 @@ fn boot( fn post_boot( &self, _gsp: &Gsp, - _ctx: &mut GspBootContext<'_>, + _ctx: &mut GspBootContext<'_, '_>, _gsp_fw: &GspFirmware, ) -> Result { Ok(()) diff --git a/drivers/gpu/nova-core/gsp/hal/gh100.rs b/drivers/gpu/nova-core/gsp/hal/gh100.rs index 45ba8e6c15a7..2805a35abb79 100644 --- a/drivers/gpu/nova-core/gsp/hal/gh100.rs +++ b/drivers/gpu/nova-core/gsp/hal/gh100.rs @@ -114,7 +114,7 @@ fn wait_for_gsp_lockdown_release( struct FspUnloadBundle; impl UnloadBundle for FspUnloadBundle { - fn run(&self, ctx: &mut GspBootContext<'_>) -> Result { + fn run(&self, ctx: &mut GspBootContext<'_, '_>) -> Result { // GSP falcon does most of the work of resetting, so just wait for it to finish. read_poll_timeout( || Ok(ctx.gsp_falcon.is_riscv_active()), @@ -137,7 +137,7 @@ impl GspHal for Gh100 { fn boot( &self, gsp: &Gsp, - ctx: &mut GspBootContext<'_>, + ctx: &mut GspBootContext<'_, '_>, fb_layout: &FbLayout, wpr_meta: &Coherent, ) -> Result> { diff --git a/drivers/gpu/nova-core/gsp/hal/tu102.rs b/drivers/gpu/nova-core/gsp/hal/tu102.rs index 4fb82350aad6..2b489df6d0aa 100644 --- a/drivers/gpu/nova-core/gsp/hal/tu102.rs +++ b/drivers/gpu/nova-core/gsp/hal/tu102.rs @@ -78,7 +78,7 @@ struct Sec2UnloadBundle { } impl UnloadBundle for Sec2UnloadBundle { - fn run(&self, ctx: &mut GspBootContext<'_>) -> Result { + fn run(&self, ctx: &mut GspBootContext<'_, '_>) -> Result { let dev = ctx.dev(); let bar = ctx.bar; @@ -260,7 +260,7 @@ impl GspHal for Tu102 { fn boot( &self, gsp: &Gsp, - ctx: &mut GspBootContext<'_>, + ctx: &mut GspBootContext<'_, '_>, fb_layout: &FbLayout, wpr_meta: &Coherent, ) -> Result> { @@ -316,7 +316,12 @@ fn boot( Ok(unload_guard.dismiss()) } - fn post_boot(&self, gsp: &Gsp, ctx: &mut GspBootContext<'_>, gsp_fw: &GspFirmware) -> Result { + fn post_boot( + &self, + gsp: &Gsp, + ctx: &mut GspBootContext<'_, '_>, + gsp_fw: &GspFirmware, + ) -> Result { GspSequencer::run( &gsp.cmdq, ctx, diff --git a/drivers/gpu/nova-core/gsp/sequencer.rs b/drivers/gpu/nova-core/gsp/sequencer.rs index ddce32cc4e30..422a74f9ecbd 100644 --- a/drivers/gpu/nova-core/gsp/sequencer.rs +++ b/drivers/gpu/nova-core/gsp/sequencer.rs @@ -335,7 +335,7 @@ fn next(&mut self) -> Option { impl<'a> GspSequencer<'a> { pub(crate) fn run( cmdq: &Cmdq, - ctx: &'a GspBootContext<'_>, + ctx: &'a GspBootContext<'_, '_>, libos_dma_handle: u64, bootloader_app_version: u32, ) -> Result { -- 2.54.0