diff options
Diffstat (limited to 'kernel/gsp_phys_gpu.c')
| -rw-r--r-- | kernel/gsp_phys_gpu.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/kernel/gsp_phys_gpu.c b/kernel/gsp_phys_gpu.c index cfa3d4e..227246b 100644 --- a/kernel/gsp_phys_gpu.c +++ b/kernel/gsp_phys_gpu.c @@ -316,6 +316,32 @@ bool gsp_phys_fault_inject_enabled(void) EXPORT_SYMBOL_GPL(gsp_phys_fault_inject_enabled); /* + * H1 rm-call ladder engine selector (default 0). 0 keeps the existing + * COPY0/CE ladder byte-identical: TSG/channel engineType COPY0, the V5 + * variant walk, BIND engineType 0x9 and the CE copy method block. 1 selects + * GR0 (NV2080_ENGINE_TYPE_GRAPHICS): the stage-3 snapshot builds the + * TSG/channel with engineType 1, makes one (no-retry) V5 channel attempt, + * allocates the TURING_COMPUTE_A (0xc5c0) engine object on the ladder + * channel, BIND uses engineType 1 and stage 4 pushes a GR + * SET_REPORT_SEMAPHORE release instead of a CE copy. The value is snapshotted + * when stage 3 starts; a later sysfs change is logged once and ignored, so a + * session can never mix a GR0 channel with a COPY0 BIND. Every CE forwarding + * path (P5/P6a selftest/P6b/P6c) refuses cleanly on a GR ladder. One-line + * rollback: gsp_phys_rmcall_engine=0. + */ +static int gsp_phys_rmcall_engine_param; +module_param_named(gsp_phys_rmcall_engine, gsp_phys_rmcall_engine_param, int, + 0644); +MODULE_PARM_DESC(gsp_phys_rmcall_engine, + "RM-client ladder engine: 0 = COPY0 (default, existing CE copy ladder), 1 = GR0 (TURING_COMPUTE_A engine object and a GR semaphore release)"); + +int gsp_phys_rmcall_engine_value(void) +{ + return gsp_phys_rmcall_engine_param; +} +EXPORT_SYMBOL_GPL(gsp_phys_rmcall_engine_value); + +/* * One-way power latch (default). Re-enabling runtime PM and D3cold after a * claim lets the board power-gate and the host hard-freeze on resume * (observed 2026-10-01); keep the pre-claim D0 policy instead and require |