[PATCH 2/2] drm/xe/guc: Separate full CTB content from guc_info debugfs
John.C.Harrison at Intel.com
John.C.Harrison at Intel.com
Wed Oct 23 00:17:35 UTC 2024
From: John Harrison <John.C.Harrison at Intel.com>
The guc_info debugfs file is meant to be a quick view of the current
software state of the GuC interface. Including the full CTN contents
makes the file as a whole much less human readable and is not
partiular useful in the general case. So don't pollute the info dump
with the full buffers. Instead, move those into a separate debugfs
entry that can be read when that information is actually required.
Also, improve the human readability by adding a few extra blank lines
to delimt the sections.
Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
---
drivers/gpu/drm/xe/xe_devcoredump.c | 2 +-
drivers/gpu/drm/xe/xe_guc.c | 5 ++++-
drivers/gpu/drm/xe/xe_guc_ct.c | 25 ++++++++++++-------------
drivers/gpu/drm/xe/xe_guc_ct.h | 8 +++++---
drivers/gpu/drm/xe/xe_guc_debugfs.c | 14 ++++++++++++++
5 files changed, 36 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/xe/xe_devcoredump.c b/drivers/gpu/drm/xe/xe_devcoredump.c
index 8b0ea77661b2..5d7d8192d6f3 100644
--- a/drivers/gpu/drm/xe/xe_devcoredump.c
+++ b/drivers/gpu/drm/xe/xe_devcoredump.c
@@ -267,7 +267,7 @@ static void devcoredump_snapshot(struct xe_devcoredump *coredump,
fw_ref = xe_force_wake_get(gt_to_fw(q->gt), XE_FORCEWAKE_ALL);
ss->guc.log = xe_guc_log_snapshot_capture(&guc->log, true);
- ss->guc.ct = xe_guc_ct_snapshot_capture(&guc->ct, true);
+ ss->guc.ct = xe_guc_ct_snapshot_capture(&guc->ct, true, true);
ss->ge = xe_guc_exec_queue_snapshot_capture(q);
ss->job = xe_sched_job_snapshot_capture(job);
ss->vm = xe_vm_snapshot_capture(q->vm);
diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index b065bb9973e9..fcb540003e53 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -1187,7 +1187,10 @@ void xe_guc_print_info(struct xe_guc *guc, struct drm_printer *p)
xe_force_wake_put(gt_to_fw(gt), fw_ref);
- xe_guc_ct_print(&guc->ct, p);
+ drm_puts(p, "\n");
+ xe_guc_ct_print(&guc->ct, p, false);
+
+ drm_puts(p, "\n");
xe_guc_submit_print(guc, p);
}
diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index c260d8840990..352673b6974a 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -1607,7 +1607,8 @@ static void g2h_worker_func(struct work_struct *w)
receive_g2h(ct);
}
-struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_alloc(struct xe_guc_ct *ct, bool atomic)
+struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_alloc(struct xe_guc_ct *ct, bool atomic,
+ bool want_ctb)
{
struct xe_guc_ct_snapshot *snapshot;
@@ -1615,7 +1616,7 @@ struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_alloc(struct xe_guc_ct *ct, bool a
if (!snapshot)
return NULL;
- if (ct->bo) {
+ if (ct->bo && want_ctb) {
snapshot->ctb_size = ct->bo->size;
snapshot->ctb = kmalloc(snapshot->ctb_size, atomic ? GFP_ATOMIC : GFP_KERNEL);
}
@@ -1650,6 +1651,7 @@ static void guc_ctb_snapshot_print(struct guc_ctb_snapshot *snapshot,
* @ct: GuC CT object.
* @atomic: Boolean to indicate if this is called from atomic context like
* reset or CTB handler or from some regular path like debugfs.
+ * @want_ctb: Should the full CTB content be captured (vs just the headers)
*
* This can be printed out in a later stage like during dev_coredump
* analysis.
@@ -1658,12 +1660,12 @@ static void guc_ctb_snapshot_print(struct guc_ctb_snapshot *snapshot,
* by using `xe_guc_ct_snapshot_free`.
*/
struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_capture(struct xe_guc_ct *ct,
- bool atomic)
+ bool atomic, bool want_ctb)
{
struct xe_device *xe = ct_to_xe(ct);
struct xe_guc_ct_snapshot *snapshot;
- snapshot = xe_guc_ct_snapshot_alloc(ct, atomic);
+ snapshot = xe_guc_ct_snapshot_alloc(ct, atomic, want_ctb);
if (!snapshot) {
xe_gt_err(ct_to_gt(ct), "Skipping CTB snapshot entirely.\n");
return NULL;
@@ -1704,12 +1706,8 @@ void xe_guc_ct_snapshot_print(struct xe_guc_ct_snapshot *snapshot,
drm_printf(p, "\tg2h outstanding: %d\n",
snapshot->g2h_outstanding);
- if (snapshot->ctb) {
+ if (snapshot->ctb)
xe_print_blob_ascii85(p, "CTB data", snapshot->ctb, 0, snapshot->ctb_size);
- } else {
- drm_printf(p, "CTB snapshot missing!\n");
- return;
- }
} else {
drm_puts(p, "CT disabled\n");
}
@@ -1736,13 +1734,14 @@ void xe_guc_ct_snapshot_free(struct xe_guc_ct_snapshot *snapshot)
* @ct: GuC CT.
* @p: drm_printer where it will be printed out.
*
- * This function quickly capture a snapshot and immediately print it out.
+ * This function will quickly capture a snapshot of the CT state
+ * and immediately print it out.
*/
-void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p)
+void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p, bool want_ctb)
{
struct xe_guc_ct_snapshot *snapshot;
- snapshot = xe_guc_ct_snapshot_capture(ct, false);
+ snapshot = xe_guc_ct_snapshot_capture(ct, false, want_ctb);
xe_guc_ct_snapshot_print(snapshot, p);
xe_guc_ct_snapshot_free(snapshot);
}
@@ -1776,7 +1775,7 @@ static void ct_dead_capture(struct xe_guc_ct *ct, struct guc_ctb *ctb, u32 reaso
return;
snapshot_log = xe_guc_log_snapshot_capture(&guc->log, true);
- snapshot_ct = xe_guc_ct_snapshot_capture((ct), true);
+ snapshot_ct = xe_guc_ct_snapshot_capture((ct), true, true);
spin_lock_irqsave(&ct->dead.lock, flags);
diff --git a/drivers/gpu/drm/xe/xe_guc_ct.h b/drivers/gpu/drm/xe/xe_guc_ct.h
index 338f0b75d29f..01d3b0183bf0 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.h
+++ b/drivers/gpu/drm/xe/xe_guc_ct.h
@@ -17,11 +17,13 @@ void xe_guc_ct_disable(struct xe_guc_ct *ct);
void xe_guc_ct_stop(struct xe_guc_ct *ct);
void xe_guc_ct_fast_path(struct xe_guc_ct *ct);
-struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_alloc(struct xe_guc_ct *ct, bool atomic);
-struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_capture(struct xe_guc_ct *ct, bool atomic);
+struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_alloc(struct xe_guc_ct *ct, bool atomic,
+ bool want_ctb);
+struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_capture(struct xe_guc_ct *ct, bool atomic,
+ bool want_ctb);
void xe_guc_ct_snapshot_print(struct xe_guc_ct_snapshot *snapshot, struct drm_printer *p);
void xe_guc_ct_snapshot_free(struct xe_guc_ct_snapshot *snapshot);
-void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p);
+void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p, bool want_ctb);
static inline bool xe_guc_ct_enabled(struct xe_guc_ct *ct)
{
diff --git a/drivers/gpu/drm/xe/xe_guc_debugfs.c b/drivers/gpu/drm/xe/xe_guc_debugfs.c
index d3822cbea273..995b306aced7 100644
--- a/drivers/gpu/drm/xe/xe_guc_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_guc_debugfs.c
@@ -47,9 +47,23 @@ static int guc_log(struct seq_file *m, void *data)
return 0;
}
+static int guc_ctb(struct seq_file *m, void *data)
+{
+ struct xe_guc *guc = node_to_guc(m->private);
+ struct xe_device *xe = guc_to_xe(guc);
+ struct drm_printer p = drm_seq_file_printer(m);
+
+ xe_pm_runtime_get(xe);
+ xe_guc_ct_print(&guc->ct, &p, true);
+ xe_pm_runtime_put(xe);
+
+ return 0;
+}
+
static const struct drm_info_list debugfs_list[] = {
{"guc_info", guc_info, 0},
{"guc_log", guc_log, 0},
+ {"guc_ctb", guc_ctb, 0},
};
void xe_guc_debugfs_register(struct xe_guc *guc, struct dentry *parent)
--
2.47.0
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