1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_guc_log.c b/drivers/gpu/drm/xe/xe_guc_log.c
new file mode 100644
index 000000000000..7ec1b2bb1f8e
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_guc_log.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include <drm/drm_managed.h>
+
+#include "xe_bo.h"
+#include "xe_gt.h"
+#include "xe_guc_log.h"
+#include "xe_map.h"
+#include "xe_module.h"
+
+static struct xe_gt *
+log_to_gt(struct xe_guc_log *log)
+{
+	return container_of(log, struct xe_gt, uc.guc.log);
+}
+
+static struct xe_device *
+log_to_xe(struct xe_guc_log *log)
+{
+	return gt_to_xe(log_to_gt(log));
+}
+
+static size_t guc_log_size(void)
+{
+	/*
+	 *  GuC Log buffer Layout
+	 *
+	 *  +===============================+ 00B
+	 *  |    Crash dump state header    |
+	 *  +-------------------------------+ 32B
+	 *  |      Debug state header       |
+	 *  +-------------------------------+ 64B
+	 *  |     Capture state header      |
+	 *  +-------------------------------+ 96B
+	 *  |                               |
+	 *  +===============================+ PAGE_SIZE (4KB)
+	 *  |        Crash Dump logs        |
+	 *  +===============================+ + CRASH_SIZE
+	 *  |          Debug logs           |
+	 *  +===============================+ + DEBUG_SIZE
+	 *  |         Capture logs          |
+	 *  +===============================+ + CAPTURE_SIZE
+	 */
+	return PAGE_SIZE + CRASH_BUFFER_SIZE + DEBUG_BUFFER_SIZE +
+		CAPTURE_BUFFER_SIZE;
+}
+
+void xe_guc_log_print(struct xe_guc_log *log, struct drm_printer *p)
+{
+	struct xe_device *xe = log_to_xe(log);
+	size_t size;
+	int i, j;
+
+	XE_BUG_ON(!log->bo);
+
+	size = log->bo->size;
+
+#define DW_PER_READ		128
+	XE_BUG_ON(size % (DW_PER_READ * sizeof(u32)));
+	for (i = 0; i < size / sizeof(u32); i += DW_PER_READ) {
+		u32 read[DW_PER_READ];
+
+		xe_map_memcpy_from(xe, read, &log->bo->vmap, i * sizeof(u32),
+				   DW_PER_READ * sizeof(u32));
+#define DW_PER_PRINT		4
+		for (j = 0; j < DW_PER_READ / DW_PER_PRINT; ++j) {
+			u32 *print = read + j * DW_PER_PRINT;
+
+			drm_printf(p, "0x%08x 0x%08x 0x%08x 0x%08x\n",
+				   *(print + 0), *(print + 1),
+				   *(print + 2), *(print + 3));
+		}
+	}
+}
+
+static void guc_log_fini(struct drm_device *drm, void *arg)
+{
+	struct xe_guc_log *log = arg;
+
+	xe_bo_unpin_map_no_vm(log->bo);
+}
+
+int xe_guc_log_init(struct xe_guc_log *log)
+{
+	struct xe_device *xe = log_to_xe(log);
+	struct xe_gt *gt = log_to_gt(log);
+	struct xe_bo *bo;
+	int err;
+
+	bo = xe_bo_create_pin_map(xe, gt, NULL, guc_log_size(),
+				  ttm_bo_type_kernel,
+				  XE_BO_CREATE_VRAM_IF_DGFX(gt) |
+				  XE_BO_CREATE_GGTT_BIT);
+	if (IS_ERR(bo))
+		return PTR_ERR(bo);
+
+	xe_map_memset(xe, &bo->vmap, 0, 0, guc_log_size());
+	log->bo = bo;
+	log->level = xe_guc_log_level;
+
+	err = drmm_add_action_or_reset(&xe->drm, guc_log_fini, log);
+	if (err)
+		return err;
+
+	return 0;
+}