broken:
drm_err(drm, "No forward process on H2G, reset required");
- xe_guc_ct_print(ct, &p);
+ xe_guc_ct_print(ct, &p, true);
ct->ctbs.h2g.info.broken = true;
return -EDEADLK;
struct drm_device *drm = &ct_to_xe(ct)->drm;
struct drm_printer p = drm_info_printer(drm->dev);
- xe_guc_ct_print(ct, &p);
+ xe_guc_ct_print(ct, &p, false);
kick_reset(ct);
}
} while (ret == 1);
xe_device_mem_access_put(ct_to_xe(ct));
}
-static void guc_ct_ctb_print(struct xe_device *xe, struct guc_ctb *ctb,
- struct drm_printer *p)
+static void guc_ctb_snapshot_capture(struct xe_device *xe, struct guc_ctb *ctb,
+ struct guc_ctb_snapshot *snapshot,
+ bool atomic)
{
u32 head, tail;
- drm_printf(p, "\tsize: %d\n", ctb->info.size);
- drm_printf(p, "\tresv_space: %d\n", ctb->info.resv_space);
- drm_printf(p, "\thead: %d\n", ctb->info.head);
- drm_printf(p, "\ttail: %d\n", ctb->info.tail);
- drm_printf(p, "\tspace: %d\n", ctb->info.space);
- drm_printf(p, "\tbroken: %d\n", ctb->info.broken);
+ xe_map_memcpy_from(xe, &snapshot->desc, &ctb->desc, 0,
+ sizeof(struct guc_ct_buffer_desc));
+ memcpy(&snapshot->info, &ctb->info, sizeof(struct guc_ctb_info));
- head = desc_read(xe, ctb, head);
- tail = desc_read(xe, ctb, tail);
- drm_printf(p, "\thead (memory): %d\n", head);
- drm_printf(p, "\ttail (memory): %d\n", tail);
- drm_printf(p, "\tstatus (memory): 0x%x\n", desc_read(xe, ctb, status));
+ snapshot->cmds = kmalloc_array(ctb->info.size, sizeof(u32),
+ atomic ? GFP_ATOMIC : GFP_KERNEL);
+
+ if (!snapshot->cmds) {
+ drm_err(&xe->drm, "Skipping CTB commands snapshot. Only CTB info will be available.\n");
+ return;
+ }
+
+ head = snapshot->desc.head;
+ tail = snapshot->desc.tail;
if (head != tail) {
struct iosys_map map =
IOSYS_MAP_INIT_OFFSET(&ctb->cmds, head * sizeof(u32));
while (head != tail) {
- drm_printf(p, "\tcmd[%d]: 0x%08x\n", head,
- xe_map_rd(xe, &map, 0, u32));
+ snapshot->cmds[head] = xe_map_rd(xe, &map, 0, u32);
++head;
if (head == ctb->info.size) {
head = 0;
}
}
-void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p)
+static void guc_ctb_snapshot_print(struct guc_ctb_snapshot *snapshot,
+ struct drm_printer *p)
+{
+ u32 head, tail;
+
+ drm_printf(p, "\tsize: %d\n", snapshot->info.size);
+ drm_printf(p, "\tresv_space: %d\n", snapshot->info.space);
+ drm_printf(p, "\thead: %d\n", snapshot->info.head);
+ drm_printf(p, "\ttail: %d\n", snapshot->info.tail);
+ drm_printf(p, "\tspace: %d\n", snapshot->info.space);
+ drm_printf(p, "\tbroken: %d\n", snapshot->info.broken);
+ drm_printf(p, "\thead (memory): %d\n", snapshot->desc.head);
+ drm_printf(p, "\ttail (memory): %d\n", snapshot->desc.tail);
+ drm_printf(p, "\tstatus (memory): 0x%x\n", snapshot->desc.status);
+
+ if (!snapshot->cmds)
+ return;
+
+ head = snapshot->desc.head;
+ tail = snapshot->desc.tail;
+
+ while (head != tail) {
+ drm_printf(p, "\tcmd[%d]: 0x%08x\n", head,
+ snapshot->cmds[head]);
+ ++head;
+ if (head == snapshot->info.size)
+ head = 0;
+ }
+}
+
+static void guc_ctb_snapshot_free(struct guc_ctb_snapshot *snapshot)
{
+ kfree(snapshot->cmds);
+}
+
+/**
+ * xe_guc_ct_snapshot_capture - Take a quick snapshot of the CT state.
+ * @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.
+ *
+ * This can be printed out in a later stage like during dev_coredump
+ * analysis.
+ *
+ * Returns: a GuC CT snapshot object that must be freed by the caller
+ * by using `xe_guc_ct_snapshot_free`.
+ */
+struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_capture(struct xe_guc_ct *ct,
+ bool atomic)
+{
+ struct xe_device *xe = ct_to_xe(ct);
+ struct xe_guc_ct_snapshot *snapshot;
+
+ snapshot = kzalloc(sizeof(*snapshot),
+ atomic ? GFP_ATOMIC : GFP_KERNEL);
+
+ if (!snapshot) {
+ drm_err(&xe->drm, "Skipping CTB snapshot entirely.\n");
+ return NULL;
+ }
+
if (ct->enabled) {
+ snapshot->ct_enabled = true;
+ guc_ctb_snapshot_capture(xe, &ct->ctbs.h2g,
+ &snapshot->h2g, atomic);
+ guc_ctb_snapshot_capture(xe, &ct->ctbs.g2h,
+ &snapshot->g2h, atomic);
+ }
+
+ return snapshot;
+}
+
+/**
+ * xe_guc_ct_snapshot_print - Print out a given GuC CT snapshot.
+ * @snapshot: GuC CT snapshot object.
+ * @p: drm_printer where it will be printed out.
+ *
+ * This function prints out a given GuC CT snapshot object.
+ */
+void xe_guc_ct_snapshot_print(struct xe_guc_ct_snapshot *snapshot,
+ struct drm_printer *p)
+{
+ if (!snapshot)
+ return;
+
+ if (snapshot->ct_enabled) {
drm_puts(p, "\nH2G CTB (all sizes in DW):\n");
- guc_ct_ctb_print(ct_to_xe(ct), &ct->ctbs.h2g, p);
+ guc_ctb_snapshot_print(&snapshot->h2g, p);
drm_puts(p, "\nG2H CTB (all sizes in DW):\n");
- guc_ct_ctb_print(ct_to_xe(ct), &ct->ctbs.g2h, p);
- drm_printf(p, "\tg2h outstanding: %d\n", ct->g2h_outstanding);
+ guc_ctb_snapshot_print(&snapshot->g2h, p);
+
+ drm_printf(p, "\tg2h outstanding: %d\n",
+ snapshot->g2h_outstanding);
} else {
drm_puts(p, "\nCT disabled\n");
}
}
+/**
+ * xe_guc_ct_snapshot_free - Free all allocated objects for a given snapshot.
+ * @snapshot: GuC CT snapshot object.
+ *
+ * This function free all the memory that needed to be allocated at capture
+ * time.
+ */
+void xe_guc_ct_snapshot_free(struct xe_guc_ct_snapshot *snapshot)
+{
+ if (!snapshot)
+ return;
+
+ guc_ctb_snapshot_free(&snapshot->h2g);
+ guc_ctb_snapshot_free(&snapshot->g2h);
+ kfree(snapshot);
+}
+
+/**
+ * xe_guc_ct_print - GuC CT Print.
+ * @ct: GuC CT.
+ * @p: drm_printer where it will be printed out.
+ * @atomic: Boolean to indicate if this is called from atomic context like
+ * reset or CTB handler or from some regular path like debugfs.
+ *
+ * This function quickly capture a snapshot and immediately print it out.
+ */
+void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p, bool atomic)
+{
+ struct xe_guc_ct_snapshot *snapshot;
+
+ snapshot = xe_guc_ct_snapshot_capture(ct, atomic);
+ xe_guc_ct_snapshot_print(snapshot, p);
+ xe_guc_ct_snapshot_free(snapshot);
+}
+
#ifdef XE_GUC_CT_SELFTEST
/*
* Disable G2H processing in IRQ handler to force xe_guc_ct_send to enter flow
ret = xe_guc_ct_send(ct, action, ARRAY_SIZE(action), 4, 1);
if (ret) {
drm_printf(p, "Aborted pass %d, ret %d\n", i, ret);
- xe_guc_ct_print(ct, p);
+ xe_guc_ct_print(ct, p, true);
break;
}
}