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, 62 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_guc_ct.h b/drivers/gpu/drm/xe/xe_guc_ct.h
new file mode 100644
index 000000000000..49fb74f91e4d
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_guc_ct.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef _XE_GUC_CT_H_
+#define _XE_GUC_CT_H_
+
+#include "xe_guc_ct_types.h"
+
+struct drm_printer;
+
+int xe_guc_ct_init(struct xe_guc_ct *ct);
+int xe_guc_ct_enable(struct xe_guc_ct *ct);
+void xe_guc_ct_disable(struct xe_guc_ct *ct);
+void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p);
+void xe_guc_ct_fast_path(struct xe_guc_ct *ct);
+
+static inline void xe_guc_ct_irq_handler(struct xe_guc_ct *ct)
+{
+	wake_up_all(&ct->wq);
+#ifdef XE_GUC_CT_SELFTEST
+	if (!ct->suppress_irq_handler && ct->enabled)
+		queue_work(system_unbound_wq, &ct->g2h_worker);
+#else
+	if (ct->enabled)
+		queue_work(system_unbound_wq, &ct->g2h_worker);
+#endif
+	xe_guc_ct_fast_path(ct);
+}
+
+/* Basic CT send / receives */
+int xe_guc_ct_send(struct xe_guc_ct *ct, const u32 *action, u32 len,
+		   u32 g2h_len, u32 num_g2h);
+int xe_guc_ct_send_locked(struct xe_guc_ct *ct, const u32 *action, u32 len,
+			  u32 g2h_len, u32 num_g2h);
+int xe_guc_ct_send_recv(struct xe_guc_ct *ct, const u32 *action, u32 len,
+			u32 *response_buffer);
+static inline int
+xe_guc_ct_send_block(struct xe_guc_ct *ct, const u32 *action, u32 len)
+{
+	return xe_guc_ct_send_recv(ct, action, len, NULL);
+}
+
+/* This is only version of the send CT you can call from a G2H handler */
+int xe_guc_ct_send_g2h_handler(struct xe_guc_ct *ct, const u32 *action,
+			       u32 len);
+
+/* Can't fail because a GT reset is in progress */
+int xe_guc_ct_send_recv_no_fail(struct xe_guc_ct *ct, const u32 *action,
+				u32 len, u32 *response_buffer);
+static inline int
+xe_guc_ct_send_block_no_fail(struct xe_guc_ct *ct, const u32 *action, u32 len)
+{
+	return xe_guc_ct_send_recv_no_fail(ct, action, len, NULL);
+}
+
+#ifdef XE_GUC_CT_SELFTEST
+void xe_guc_ct_selftest(struct xe_guc_ct *ct, struct drm_printer *p);
+#endif
+
+#endif