iris: Initial commit of a new 'iris' driver for Intel Gen8+ GPUs.

This commit introduces a new Gallium driver for Intel Gen8+ GPUs,
named 'iris_dri.so' after the hardware.

Developed by:
- Kenneth Graunke (overall driver)
- Dave Airlie (shaders, conditional render, overflow query, Gen8 port)
- Chris Wilson (fencing, pinned memory, ...)
- Jordan Justen (compute shaders)
- Jason Ekstrand (image load store)
- Caio Marcelo de Oliveira Filho (tessellation control passthrough)
- Rafael Antognolli (auxiliary buffer fixes)
- The rest of the i965 contributors and the Mesa community

src/gallium/drivers/iris/iris_screen.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef IRIS_SCREEN_H
+#define IRIS_SCREEN_H
+
+#include "pipe/p_screen.h"
+#include "state_tracker/drm_driver.h"
+#include "util/slab.h"
+#include "util/u_screen.h"
+#include "intel/dev/gen_device_info.h"
+#include "intel/isl/isl.h"
+#include "iris_bufmgr.h"
+
+struct iris_bo;
+
+#define IRIS_MAX_TEXTURE_SAMPLERS 32
+#define IRIS_MAX_SOL_BUFFERS 4
+
+struct iris_screen {
+   struct pipe_screen base;
+   int fd;
+   int pci_id;
+
+   unsigned program_id;
+
+   struct gen_device_info devinfo;
+   struct isl_device isl_dev;
+   struct iris_bufmgr *bufmgr;
+   struct brw_compiler *compiler;
+};
+
+struct pipe_screen *iris_screen_create(int fd);
+
+boolean
+iris_is_format_supported(struct pipe_screen *pscreen,
+                         enum pipe_format format,
+                         enum pipe_texture_target target,
+                         unsigned sample_count,
+                         unsigned storage_sample_count,
+                         unsigned usage);
+
+#endif