From ab6fed7ee35a114541373af90184acde9bd94b6b Mon Sep 17 00:00:00 2001 From: Arthur Hanson Rasmusson Date: Wed, 7 Oct 2026 11:05:24 -0400 Subject: gr-regs/vgsp: sample PGRAPH_INTR + PGRAPH_INTR_EN at the dispatch window The m75/m78/m79 launch windows show FECS_CTXSW_STATUS_FE_0.GR_INTR_REQ (bit17) asserted through the SKED CWD ACTIVE state and a following CTXSW_REQ (bit0) that results in the context save/unload. The real driver carries GR_INTR only transiently during its context load and clears it before ACTIVE. The PGRAPH interrupt latch (0x400100) names what the engine is signaling (e.g. ILLEGAL_METHOD bit4, SEMAPHORE bit1, NOTIFY); sampled by the external sampler and dumped in the launch post-mortem. --- kernel/gsp_phys_booter.c | 6 ++++-- tools/gr-regs/reg_sampler.py | 2 ++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/gsp_phys_booter.c b/kernel/gsp_phys_booter.c index 241fe04..dbc6c43 100644 --- a/kernel/gsp_phys_booter.c +++ b/kernel/gsp_phys_booter.c @@ -16727,7 +16727,7 @@ gr_page_unmapped: ioread32(bar0 + 0x0040a508u), ioread32(bar0 + 0x0040a50cu)); if (bar0) - pr_info("vgsp-gr: SKED readback: HWW_ESR=0x%08x HWW_EN=0x%08x INFO1=0x%08x INFO2=0x%08x INFO3=0x%08x CWD_T0=0x%08x CWD_T1=0x%08x CWD_T2=0x%08x ACT=0x%08x FECS_CTX=0x%08x CWD_FS=0x%08x\n", + pr_info("vgsp-gr: SKED readback: HWW_ESR=0x%08x HWW_EN=0x%08x INFO1=0x%08x INFO2=0x%08x INFO3=0x%08x CWD_T0=0x%08x CWD_T1=0x%08x CWD_T2=0x%08x ACT=0x%08x FECS_CTX=0x%08x CWD_FS=0x%08x PGRAPH_INTR=0x%08x INTR_EN=0x%08x\n", ioread32(bar0 + 0x00407020u), ioread32(bar0 + 0x00407024u), ioread32(bar0 + 0x00407028u), @@ -16738,7 +16738,9 @@ gr_page_unmapped: ioread32(bar0 + 0x00407068u), ioread32(bar0 + 0x00407054u), ioread32(bar0 + 0x00409b00u), - ioread32(bar0 + 0x00405b00u)); + ioread32(bar0 + 0x00405b00u), + ioread32(bar0 + 0x00400100u), + ioread32(bar0 + 0x0040013cu)); if (bar0) pr_info("vgsp-gr: SKED watermark[0..15]=0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", ioread32(bar0 + 0x004070a0u), diff --git a/tools/gr-regs/reg_sampler.py b/tools/gr-regs/reg_sampler.py index 495ace8..af00db7 100644 --- a/tools/gr-regs/reg_sampler.py +++ b/tools/gr-regs/reg_sampler.py @@ -31,6 +31,8 @@ import time DEV = "/sys/bus/pci/devices/0000:01:00.0/resource0" REGS = [ (0x000200, "PMC_ENABLE"), + (0x400100, "PGRAPH_INTR"), + (0x40013C, "PGRAPH_INTR_EN"), (0x400700, "PGRAPH_STATUS"), (0x400504, "GRFIFO_STATUS"), (0x400704, "TRAPPED_ADDR"), -- cgit v1.2.3