--- /dev/null
+/*
+ * Copyright © 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.
+ *
+ * Authors:
+ * Mika Kuoppala <mika.kuoppala@intel.com>
+ *
+ */
+
+#include "i915_drv.h"
+#include "intel_renderstate.h"
+
+struct i915_render_state {
+ struct drm_i915_gem_object *obj;
+ unsigned long ggtt_offset;
+ void *batch;
+ u32 size;
+ u32 len;
+};
+
+static struct i915_render_state *render_state_alloc(struct drm_device *dev)
+{
+ struct i915_render_state *so;
+ struct page *page;
+ int ret;
+
+ so = kzalloc(sizeof(*so), GFP_KERNEL);
+ if (!so)
+ return ERR_PTR(-ENOMEM);
+
+ so->obj = i915_gem_alloc_object(dev, 4096);
+ if (so->obj == NULL) {
+ ret = -ENOMEM;
+ goto free;
+ }
+ so->size = 4096;
+
+ ret = i915_gem_obj_ggtt_pin(so->obj, 4096, 0);
+ if (ret)
+ goto free_gem;
+
+ BUG_ON(so->obj->pages->nents != 1);
+ page = sg_page(so->obj->pages->sgl);
+
+ so->batch = kmap(page);
+ if (!so->batch) {
+ ret = -ENOMEM;
+ goto unpin;
+ }
+
+ so->ggtt_offset = i915_gem_obj_ggtt_offset(so->obj);
+
+ return so;
+unpin:
+ i915_gem_object_ggtt_unpin(so->obj);
+free_gem:
+ drm_gem_object_unreference(&so->obj->base);
+free:
+ kfree(so);
+ return ERR_PTR(ret);
+}
+
+static void render_state_free(struct i915_render_state *so)
+{
+ kunmap(so->batch);
+ i915_gem_object_ggtt_unpin(so->obj);
+ drm_gem_object_unreference(&so->obj->base);
+ kfree(so);
+}
+
+static const struct intel_renderstate_rodata *
+render_state_get_rodata(struct drm_device *dev, const int gen)
+{
+ switch (gen) {
+ case 6:
+ return &gen6_null_state;
+ case 7:
+ return &gen7_null_state;
+ case 8:
+ return &gen8_null_state;
+ }
+
+ return NULL;
+}
+
+static int render_state_setup(const int gen,
+ const struct intel_renderstate_rodata *rodata,
+ struct i915_render_state *so)
+{
+ const u64 goffset = i915_gem_obj_ggtt_offset(so->obj);
+ u32 reloc_index = 0;
+ u32 * const d = so->batch;
+ unsigned int i = 0;
+ int ret;
+
+ if (!rodata || rodata->batch_items * 4 > so->size)
+ return -EINVAL;
+
+ ret = i915_gem_object_set_to_cpu_domain(so->obj, true);
+ if (ret)
+ return ret;
+
+ while (i < rodata->batch_items) {
+ u32 s = rodata->batch[i];
+
+ if (reloc_index < rodata->reloc_items &&
+ i * 4 == rodata->reloc[reloc_index]) {
+
+ s += goffset & 0xffffffff;
+
+ /* We keep batch offsets max 32bit */
+ if (gen >= 8) {
+ if (i + 1 >= rodata->batch_items ||
+ rodata->batch[i + 1] != 0)
+ return -EINVAL;
+
+ d[i] = s;
+ i++;
+ s = (goffset & 0xffffffff00000000ull) >> 32;
+ }
+
+ reloc_index++;
+ }
+
+ d[i] = s;
+ i++;
+ }
+
+ ret = i915_gem_object_set_to_gtt_domain(so->obj, false);
+ if (ret)
+ return ret;
+
+ if (rodata->reloc_items != reloc_index) {
+ DRM_ERROR("not all relocs resolved, %d out of %d\n",
+ reloc_index, rodata->reloc_items);
+ return -EINVAL;
+ }
+
+ so->len = rodata->batch_items * 4;
+
+ return 0;
+}
+
+int i915_gem_render_state_init(struct intel_ring_buffer *ring)
+{
+ const int gen = INTEL_INFO(ring->dev)->gen;
+ struct i915_render_state *so;
+ const struct intel_renderstate_rodata *rodata;
+ u32 seqno;
+ int ret;
+
+ rodata = render_state_get_rodata(ring->dev, gen);
+ if (rodata == NULL)
+ return 0;
+
+ so = render_state_alloc(ring->dev);
+ if (IS_ERR(so))
+ return PTR_ERR(so);
+
+ ret = render_state_setup(gen, rodata, so);
+ if (ret)
+ goto out;
+
+ ret = ring->dispatch_execbuffer(ring,
+ i915_gem_obj_ggtt_offset(so->obj),
+ so->len,
+ I915_DISPATCH_SECURE);
+ if (ret)
+ goto out;
+
+ ret = i915_add_request(ring, &seqno);
+
+out:
+ render_state_free(so);
+ return ret;
+}
--- /dev/null
+/*
+ * Copyright © 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 _INTEL_RENDERSTATE_H
+#define _INTEL_RENDERSTATE_H
+
+#include <linux/types.h>
+
+struct intel_renderstate_rodata {
+ const u32 *reloc;
+ const u32 reloc_items;
+ const u32 *batch;
+ const u32 batch_items;
+};
+
+extern const struct intel_renderstate_rodata gen6_null_state;
+extern const struct intel_renderstate_rodata gen7_null_state;
+extern const struct intel_renderstate_rodata gen8_null_state;
+
+#define RO_RENDERSTATE(_g) \
+ const struct intel_renderstate_rodata gen ## _g ## _null_state = { \
+ .reloc = gen ## _g ## _null_state_relocs, \
+ .reloc_items = sizeof(gen ## _g ## _null_state_relocs)/4, \
+ .batch = gen ## _g ## _null_state_batch, \
+ .batch_items = sizeof(gen ## _g ## _null_state_batch)/4, \
+ }
+
+#endif /* INTEL_RENDERSTATE_H */
projects / platform / kernel / linux-rpi.git / commitdiff