From: John Harrison John.C.Harrison@Intel.com
[ Upstream commit 8df23e4c4f72f4e201c28e6fb0a67e2dbf30628a ]
Error captures are tagged with an 'ecode'. This is a pseduo-unique magic number that is meant to distinguish similar seeming bugs with different underlying signatures. It is a combination of two ring state registers. Unfortunately, the register state being used is only valid in execlist mode. In GuC mode, the register state exists in a separate list of arbitrary register address/value pairs rather than the named entry structure. So, search through that list to find the two exciting registers and copy them over to the structure's named members.
v2: if else if instead of if if (Alan)
Signed-off-by: John Harrison John.C.Harrison@Intel.com Reviewed-by: Alan Previn alan.previn.teres.alexis@intel.com Fixes: a6f0f9cf330a ("drm/i915/guc: Plumb GuC-capture into gpu_coredump") Cc: Alan Previn alan.previn.teres.alexis@intel.com Cc: Umesh Nerlige Ramappa umesh.nerlige.ramappa@intel.com Cc: Lucas De Marchi lucas.demarchi@intel.com Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: Tvrtko Ursulin tvrtko.ursulin@linux.intel.com Cc: Matt Roper matthew.d.roper@intel.com Cc: Aravind Iddamsetty aravind.iddamsetty@intel.com Cc: Michael Cheng michael.cheng@intel.com Cc: Matthew Brost matthew.brost@intel.com Cc: Bruce Chang yu.bruce.chang@intel.com Cc: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Cc: Matthew Auld matthew.auld@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20230311063714.570389-2-John.C... (cherry picked from commit 9724ecdbb9ddd6da3260e4a442574b90fc75188a) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/i915/gt/uc/intel_guc_capture.c | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c index fc3b994626a4f..710999d7189ee 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c @@ -1571,6 +1571,27 @@ int intel_guc_capture_print_engine_node(struct drm_i915_error_state_buf *ebuf,
#endif //CONFIG_DRM_I915_CAPTURE_ERROR
+static void guc_capture_find_ecode(struct intel_engine_coredump *ee) +{ + struct gcap_reg_list_info *reginfo; + struct guc_mmio_reg *regs; + i915_reg_t reg_ipehr = RING_IPEHR(0); + i915_reg_t reg_instdone = RING_INSTDONE(0); + int i; + + if (!ee->guc_capture_node) + return; + + reginfo = ee->guc_capture_node->reginfo + GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE; + regs = reginfo->regs; + for (i = 0; i < reginfo->num_regs; i++) { + if (regs[i].offset == reg_ipehr.reg) + ee->ipehr = regs[i].value; + else if (regs[i].offset == reg_instdone.reg) + ee->instdone.instdone = regs[i].value; + } +} + void intel_guc_capture_free_node(struct intel_engine_coredump *ee) { if (!ee || !ee->guc_capture_node) @@ -1612,6 +1633,7 @@ void intel_guc_capture_get_matching_node(struct intel_gt *gt, list_del(&n->link); ee->guc_capture_node = n; ee->guc_capture = guc->capture; + guc_capture_find_ecode(ee); return; } }