#include <linux/fault-inject.h>
#include <drm/drm_managed.h>
-#include <linux/vmalloc.h>
+#include "regs/xe_guc_regs.h"
#include "xe_bo.h"
#include "xe_devcoredump.h"
+#include "xe_force_wake.h"
#include "xe_gt.h"
#include "xe_gt_printk.h"
#include "xe_map.h"
+#include "xe_mmio.h"
#include "xe_module.h"
+static struct xe_guc *
+log_to_guc(struct xe_guc_log *log)
+{
+ return container_of(log, struct xe_guc, log);
+}
+
static struct xe_gt *
log_to_gt(struct xe_guc_log *log)
{
CAPTURE_BUFFER_SIZE;
}
+#define GUC_LOG_CHUNK_SIZE SZ_2M
+
+static struct xe_guc_log_snapshot *xe_guc_log_snapshot_alloc(struct xe_guc_log *log, bool atomic)
+{
+ struct xe_guc_log_snapshot *snapshot;
+ size_t remain;
+ int i;
+
+ snapshot = kzalloc(sizeof(*snapshot), atomic ? GFP_ATOMIC : GFP_KERNEL);
+ if (!snapshot)
+ return NULL;
+
+ /*
+ * NB: kmalloc has a hard limit well below the maximum GuC log buffer size.
+ * Also, can't use vmalloc as might be called from atomic context. So need
+ * to break the buffer up into smaller chunks that can be allocated.
+ */
+ snapshot->size = log->bo->size;
+ snapshot->num_chunks = DIV_ROUND_UP(snapshot->size, GUC_LOG_CHUNK_SIZE);
+
+ snapshot->copy = kcalloc(snapshot->num_chunks, sizeof(*snapshot->copy),
+ atomic ? GFP_ATOMIC : GFP_KERNEL);
+ if (!snapshot->copy)
+ goto fail_snap;
+
+ remain = snapshot->size;
+ for (i = 0; i < snapshot->num_chunks; i++) {
+ size_t size = min(GUC_LOG_CHUNK_SIZE, remain);
+
+ snapshot->copy[i] = kmalloc(size, atomic ? GFP_ATOMIC : GFP_KERNEL);
+ if (!snapshot->copy[i])
+ goto fail_copy;
+ remain -= size;
+ }
+
+ return snapshot;
+
+fail_copy:
+ for (i = 0; i < snapshot->num_chunks; i++)
+ kfree(snapshot->copy[i]);
+ kfree(snapshot->copy);
+fail_snap:
+ kfree(snapshot);
+ return NULL;
+}
+
/**
- * xe_guc_log_print - dump a copy of the GuC log to some useful location
+ * xe_guc_log_snapshot_free - free a previously captured GuC log snapshot
+ * @snapshot: GuC log snapshot structure
+ *
+ * Return: pointer to a newly allocated snapshot object or null if out of memory. Caller is
+ * responsible for calling xe_guc_log_snapshot_free when done with the snapshot.
+ */
+void xe_guc_log_snapshot_free(struct xe_guc_log_snapshot *snapshot)
+{
+ int i;
+
+ if (!snapshot)
+ return;
+
+ if (!snapshot->copy) {
+ for (i = 0; i < snapshot->num_chunks; i++)
+ kfree(snapshot->copy[i]);
+ kfree(snapshot->copy);
+ }
+
+ kfree(snapshot);
+}
+
+/**
+ * xe_guc_log_snapshot_capture - create a new snapshot copy the GuC log for later dumping
* @log: GuC log structure
- * @p: the printer object to output to
+ * @atomic: is the call inside an atomic section of some kind?
+ *
+ * Return: pointer to a newly allocated snapshot object or null if out of memory. Caller is
+ * responsible for calling xe_guc_log_snapshot_free when done with the snapshot.
*/
-void xe_guc_log_print(struct xe_guc_log *log, struct drm_printer *p)
+struct xe_guc_log_snapshot *xe_guc_log_snapshot_capture(struct xe_guc_log *log, bool atomic)
{
+ struct xe_guc_log_snapshot *snapshot;
struct xe_device *xe = log_to_xe(log);
- size_t size;
- void *copy;
+ struct xe_guc *guc = log_to_guc(log);
+ struct xe_gt *gt = log_to_gt(log);
+ size_t remain;
+ int i, err;
if (!log->bo) {
- drm_puts(p, "GuC log buffer not allocated");
- return;
+ xe_gt_err(gt, "GuC log buffer not allocated\n");
+ return NULL;
+ }
+
+ snapshot = xe_guc_log_snapshot_alloc(log, atomic);
+ if (!snapshot) {
+ xe_gt_err(gt, "GuC log snapshot not allocated\n");
+ return NULL;
}
- size = log->bo->size;
+ remain = snapshot->size;
+ for (i = 0; i < snapshot->num_chunks; i++) {
+ size_t size = min(GUC_LOG_CHUNK_SIZE, remain);
+
+ xe_map_memcpy_from(xe, snapshot->copy[i], &log->bo->vmap,
+ i * GUC_LOG_CHUNK_SIZE, size);
+ remain -= size;
+ }
+
+ err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+ if (err) {
+ snapshot->stamp = ~0;
+ } else {
+ snapshot->stamp = xe_mmio_read32(>->mmio, GUC_PMTIMESTAMP);
+ xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+ }
+ snapshot->ktime = ktime_get_boottime_ns();
+ snapshot->level = log->level;
+ snapshot->ver_found = guc->fw.versions.found[XE_UC_FW_VER_RELEASE];
+ snapshot->ver_want = guc->fw.versions.wanted;
+ snapshot->path = guc->fw.path;
+
+ return snapshot;
+}
+
+/**
+ * xe_guc_log_snapshot_print - dump a previously saved copy of the GuC log to some useful location
+ * @snapshot: a snapshot of the GuC log
+ * @p: the printer object to output to
+ */
+void xe_guc_log_snapshot_print(struct xe_guc_log_snapshot *snapshot, struct drm_printer *p)
+{
+ size_t remain;
+ int i;
- copy = vmalloc(size);
- if (!copy) {
- drm_printf(p, "Failed to allocate %zu", size);
+ if (!snapshot) {
+ drm_printf(p, "GuC log snapshot not allocated!\n");
return;
}
- xe_map_memcpy_from(xe, copy, &log->bo->vmap, 0, size);
+ drm_printf(p, "GuC firmware: %s\n", snapshot->path);
+ drm_printf(p, "GuC version: %u.%u.%u (wanted %u.%u.%u)\n",
+ snapshot->ver_found.major, snapshot->ver_found.minor, snapshot->ver_found.patch,
+ snapshot->ver_want.major, snapshot->ver_want.minor, snapshot->ver_want.patch);
+ drm_printf(p, "Kernel timestamp: 0x%08llX [%llu]\n", snapshot->ktime, snapshot->ktime);
+ drm_printf(p, "GuC timestamp: 0x%08X [%u]\n", snapshot->stamp, snapshot->stamp);
+ drm_printf(p, "Log level: %u\n", snapshot->level);
+
+ remain = snapshot->size;
+ for (i = 0; i < snapshot->num_chunks; i++) {
+ size_t size = min(GUC_LOG_CHUNK_SIZE, remain);
+
+ xe_print_blob_ascii85(p, i ? NULL : "Log data", snapshot->copy[i], 0, size);
+ remain -= size;
+ }
+}
+
+/**
+ * xe_guc_log_print - dump a copy of the GuC log to some useful location
+ * @log: GuC log structure
+ * @p: the printer object to output to
+ */
+void xe_guc_log_print(struct xe_guc_log *log, struct drm_printer *p)
+{
+ struct xe_guc_log_snapshot *snapshot;
- xe_print_blob_ascii85(p, "Log data", copy, 0, size);
+ drm_printf(p, "**** GuC Log ****\n");
- vfree(copy);
+ snapshot = xe_guc_log_snapshot_capture(log, false);
+ drm_printf(p, "CS reference clock: %u\n", log_to_gt(log)->info.reference_clock);
+ xe_guc_log_snapshot_print(snapshot, p);
+ xe_guc_log_snapshot_free(snapshot);
}
int xe_guc_log_init(struct xe_guc_log *log)
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