[RFC 09/44] drm/i915: Start of GPU scheduler

[John.C.Harrison@Intel.com]

From: John Harrison <John.C.Harrison@Intel.com>

Created GPU scheduler source files with only a basic init function.
---
 drivers/gpu/drm/i915/Makefile         |    1 +
 drivers/gpu/drm/i915/i915_drv.h       |    4 +++
 drivers/gpu/drm/i915/i915_gem.c       |    3 ++
 drivers/gpu/drm/i915/i915_scheduler.c |   59 +++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_scheduler.h |   40 ++++++++++++++++++++++
 5 files changed, 107 insertions(+)
 create mode 100644 drivers/gpu/drm/i915/i915_scheduler.c
 create mode 100644 drivers/gpu/drm/i915/i915_scheduler.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index cad1683..12817a8 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -11,6 +11,7 @@ i915-y := i915_drv.o \
 	  i915_params.o \
           i915_suspend.o \
 	  i915_sysfs.o \
+	  i915_scheduler.o \
 	  intel_pm.o
 i915-$(CONFIG_COMPAT)   += i915_ioc32.o
 i915-$(CONFIG_DEBUG_FS) += i915_debugfs.o
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 53f6fe5..6e592d3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1331,6 +1331,8 @@ struct intel_pipe_crc {
 	wait_queue_head_t wq;
 };
 
+struct i915_scheduler;
+
 struct drm_i915_private {
 	struct drm_device *dev;
 	struct kmem_cache *slab;
@@ -1540,6 +1542,8 @@ struct drm_i915_private {
 
 	struct i915_runtime_pm pm;
 
+	struct i915_scheduler *scheduler;
+
 	/* Old dri1 support infrastructure, beware the dragons ya fools entering
 	 * here! */
 	struct i915_dri1_state dri1;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 898660c..b784eb2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -37,6 +37,7 @@
 #include <linux/swap.h>
 #include <linux/pci.h>
 #include <linux/dma-buf.h>
+#include "i915_scheduler.h"
 
 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj);
 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj,
@@ -4669,6 +4670,8 @@ static int i915_gem_init_rings(struct drm_device *dev)
 			goto cleanup_vebox_ring;
 	}
 
+	i915_scheduler_init(dev);
+
 	ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
 	if (ret)
 		goto cleanup_bsd2_ring;
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
new file mode 100644
index 0000000..9ec0225
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2014 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ */
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "i915_scheduler.h"
+
+#ifdef CONFIG_DRM_I915_SCHEDULER
+
+int i915_scheduler_init(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct i915_scheduler   *scheduler = dev_priv->scheduler;
+
+	if (scheduler)
+		return 0;
+
+	scheduler = kzalloc(sizeof(*scheduler), GFP_KERNEL);
+	if (!scheduler)
+		return -ENOMEM;
+
+	spin_lock_init(&scheduler->lock);
+
+	scheduler->index = 1;
+
+	dev_priv->scheduler = scheduler;
+
+	return 0;
+}
+
+#else   /* CONFIG_DRM_I915_SCHEDULER */
+
+int i915_scheduler_init(struct drm_device *dev)
+{
+	return 0;
+}
+
+#endif  /* CONFIG_DRM_I915_SCHEDULER */
diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h
new file mode 100644
index 0000000..bbe1934
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_scheduler.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2014 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 _I915_SCHEDULER_H_
+#define _I915_SCHEDULER_H_
+
+int         i915_scheduler_init(struct drm_device *dev);
+
+#ifdef CONFIG_DRM_I915_SCHEDULER
+
+struct i915_scheduler {
+	uint32_t    flags[I915_NUM_RINGS];
+	spinlock_t  lock;
+	uint32_t    index;
+};
+
+#endif  /* CONFIG_DRM_I915_SCHEDULER */
+
+#endif  /* _I915_SCHEDULER_H_ */
-- 
1.7.9.5