For testing purposes it may make sense to reduce the number of guc_ids available to be allocated. Add debugfs support for setting the number of guc_ids.
Signed-off-by: Matthew Brost matthew.brost@intel.com --- .../gpu/drm/i915/gt/uc/intel_guc_debugfs.c | 31 +++++++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 3 +- 2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c index 72ddfff42f7d..7c479c5e7b3a 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c @@ -50,11 +50,42 @@ static int guc_registered_contexts_show(struct seq_file *m, void *data) } DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_registered_contexts);
+static int guc_num_id_get(void *data, u64 *val) +{ + struct intel_guc *guc = data; + + if (!intel_guc_submission_is_used(guc)) + return -ENODEV; + + *val = guc->num_guc_ids; + + return 0; +} + +static int guc_num_id_set(void *data, u64 val) +{ + struct intel_guc *guc = data; + + if (!intel_guc_submission_is_used(guc)) + return -ENODEV; + + if (val > guc->max_guc_ids) + val = guc->max_guc_ids; + else if (val < 256) + val = 256; + + guc->num_guc_ids = val; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(guc_num_id_fops, guc_num_id_get, guc_num_id_set, "%lld\n"); + void intel_guc_debugfs_register(struct intel_guc *guc, struct dentry *root) { static const struct debugfs_gt_file files[] = { { "guc_info", &guc_info_fops, NULL }, { "guc_registered_contexts", &guc_registered_contexts_fops, NULL }, + { "guc_num_id", &guc_num_id_fops, NULL }, };
if (!intel_guc_is_supported(guc)) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index abfccec7d062..3b555c05c01c 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -2574,7 +2574,8 @@ g2h_context_lookup(struct intel_guc *guc, u32 desc_idx)
if (unlikely(desc_idx >= guc->max_guc_ids)) { drm_err(&guc_to_gt(guc)->i915->drm, - "Invalid desc_idx %u", desc_idx); + "Invalid desc_idx %u, max %u", + desc_idx, guc->max_guc_ids); return NULL; }