drm/xe: Introduce a new DRM driver for Intel GPUs

Xe, is a new driver for Intel GPUs that supports both integrated and
discrete platforms starting with Tiger Lake (first Intel Xe Architecture).

The code is at a stage where it is already functional and has experimental
support for multiple platforms starting from Tiger Lake, with initial
support implemented in Mesa (for Iris and Anv, our OpenGL and Vulkan
drivers), as well as in NEO (for OpenCL and Level0).

The new Xe driver leverages a lot from i915.

As for display, the intent is to share the display code with the i915
driver so that there is maximum reuse there. But it is not added
in this patch.

This initial work is a collaboration of many people and unfortunately
the big squashed patch won't fully honor the proper credits. But let's
get some git quick stats so we can at least try to preserve some of the
credits:

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Co-developed-by: Matthew Auld <matthew.auld@intel.com>
Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Co-developed-by: Francois Dugast <francois.dugast@intel.com>
Co-developed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Co-developed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Co-developed-by: Philippe Lecluse <philippe.lecluse@intel.com>
Co-developed-by: Nirmoy Das <nirmoy.das@intel.com>
Co-developed-by: Jani Nikula <jani.nikula@intel.com>
Co-developed-by: José Roberto de Souza <jose.souza@intel.com>
Co-developed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Co-developed-by: Dave Airlie <airlied@redhat.com>
Co-developed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Co-developed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_gt_debugfs.c b/drivers/gpu/drm/xe/xe_gt_debugfs.c
new file mode 100644
index 000000000000..cd1888784141
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_gt_debugfs.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_managed.h>
+
+#include "xe_device.h"
+#include "xe_force_wake.h"
+#include "xe_gt.h"
+#include "xe_gt_debugfs.h"
+#include "xe_gt_mcr.h"
+#include "xe_gt_pagefault.h"
+#include "xe_gt_topology.h"
+#include "xe_hw_engine.h"
+#include "xe_macros.h"
+#include "xe_uc_debugfs.h"
+
+static struct xe_gt *node_to_gt(struct drm_info_node *node)
+{
+	return node->info_ent->data;
+}
+
+static int hw_engines(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+	struct xe_device *xe = gt_to_xe(gt);
+	struct drm_printer p = drm_seq_file_printer(m);
+	struct xe_hw_engine *hwe;
+	enum xe_hw_engine_id id;
+	int err;
+
+	xe_device_mem_access_get(xe);
+	err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
+	if (err) {
+		xe_device_mem_access_put(xe);
+		return err;
+	}
+
+	for_each_hw_engine(hwe, gt, id)
+		xe_hw_engine_print_state(hwe, &p);
+
+	xe_device_mem_access_put(xe);
+	err = xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int force_reset(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+
+	xe_gt_reset_async(gt);
+
+	return 0;
+}
+
+static int sa_info(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	drm_suballoc_dump_debug_info(&gt->kernel_bb_pool.base, &p,
+				     gt->kernel_bb_pool.gpu_addr);
+
+	return 0;
+}
+
+static int topology(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	xe_gt_topology_dump(gt, &p);
+
+	return 0;
+}
+
+static int steering(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	xe_gt_mcr_steering_dump(gt, &p);
+
+	return 0;
+}
+
+#ifdef CONFIG_DRM_XE_DEBUG
+static int invalidate_tlb(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+	int seqno;
+	int ret = 0;
+
+	seqno = xe_gt_tlb_invalidation(gt);
+	XE_WARN_ON(seqno < 0);
+	if (seqno > 0)
+		ret = xe_gt_tlb_invalidation_wait(gt, seqno);
+	XE_WARN_ON(ret < 0);
+
+	return 0;
+}
+#endif
+
+static const struct drm_info_list debugfs_list[] = {
+	{"hw_engines", hw_engines, 0},
+	{"force_reset", force_reset, 0},
+	{"sa_info", sa_info, 0},
+	{"topology", topology, 0},
+	{"steering", steering, 0},
+#ifdef CONFIG_DRM_XE_DEBUG
+	{"invalidate_tlb", invalidate_tlb, 0},
+#endif
+};
+
+void xe_gt_debugfs_register(struct xe_gt *gt)
+{
+	struct drm_minor *minor = gt_to_xe(gt)->drm.primary;
+	struct dentry *root;
+	struct drm_info_list *local;
+	char name[8];
+	int i;
+
+	XE_BUG_ON(!minor->debugfs_root);
+
+	sprintf(name, "gt%d", gt->info.id);
+	root = debugfs_create_dir(name, minor->debugfs_root);
+	if (IS_ERR(root)) {
+		XE_WARN_ON("Create GT directory failed");
+		return;
+	}
+
+	/*
+	 * Allocate local copy as we need to pass in the GT to the debugfs
+	 * entry and drm_debugfs_create_files just references the drm_info_list
+	 * passed in (e.g. can't define this on the stack).
+	 */
+#define DEBUGFS_SIZE	ARRAY_SIZE(debugfs_list) * sizeof(struct drm_info_list)
+	local = drmm_kmalloc(&gt_to_xe(gt)->drm, DEBUGFS_SIZE, GFP_KERNEL);
+	if (!local) {
+		XE_WARN_ON("Couldn't allocate memory");
+		return;
+	}
+
+	memcpy(local, debugfs_list, DEBUGFS_SIZE);
+#undef DEBUGFS_SIZE
+
+	for (i = 0; i < ARRAY_SIZE(debugfs_list); ++i)
+		local[i].data = gt;
+
+	drm_debugfs_create_files(local,
+				 ARRAY_SIZE(debugfs_list),
+				 root, minor);
+
+	xe_uc_debugfs_register(&gt->uc, root);
+}