HW guys say that it is not a cool idea to let device
go into rc6 without proper 3d pipeline state.
For each new uninitialized context, generate a
valid null render state to be run on context
creation.
This patch introduces a skeleton with empty states.
v2: - No need to vmap (Chris Wilson)
- use .c files for state (Daniel Vetter)
- no need to flush as i915_add_request does it
- remove parameter for batch alloc size
- don't wait for the init (Ben Widawsky)
v3: - move to cpu/gpu (Chris Wilson)
Tested-by: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx> (v1)
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 6 +
drivers/gpu/drm/i915/i915_drv.h | 2 +
drivers/gpu/drm/i915/i915_gem_context.c | 6 +
drivers/gpu/drm/i915/i915_gem_render_state.c | 194 +++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_renderstate.h | 48 ++++++
drivers/gpu/drm/i915/intel_renderstate_gen6.c | 10 ++
drivers/gpu/drm/i915/intel_renderstate_gen7.c | 10 ++
drivers/gpu/drm/i915/intel_renderstate_gen8.c | 10 ++
8 files changed, 286 insertions(+)
create mode 100644 drivers/gpu/drm/i915/i915_gem_render_state.c
create mode 100644 drivers/gpu/drm/i915/intel_renderstate.h
create mode 100644 drivers/gpu/drm/i915/intel_renderstate_gen6.c
create mode 100644 drivers/gpu/drm/i915/intel_renderstate_gen7.c
create mode 100644 drivers/gpu/drm/i915/intel_renderstate_gen8.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index b1445b7..2446916 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -18,6 +18,7 @@ i915-$(CONFIG_DEBUG_FS) += i915_debugfs.o
# GEM code
i915-y += i915_cmd_parser.o \
i915_gem_context.o \
+ i915_gem_render_state.o \
i915_gem_debug.o \
i915_gem_dmabuf.o \
i915_gem_evict.o \
@@ -32,6 +33,11 @@ i915-y += i915_cmd_parser.o \
intel_ringbuffer.o \
intel_uncore.o
+# autogenerated null render state
+i915-y += intel_renderstate_gen6.o \
+ intel_renderstate_gen7.o \
+ intel_renderstate_gen8.o
+
# modesetting core code
i915-y += intel_bios.o \
intel_display.o \
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3fc2e3d..a2fc605 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2336,6 +2336,8 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
+/* i915_gem_render_state.c */
+int i915_gem_render_state_init(struct intel_ring_buffer *ring);
/* i915_gem_evict.c */
int __must_check i915_gem_evict_something(struct drm_device *dev,
struct i915_address_space *vm,
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index f77b4c1..f7ad59e 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -699,6 +699,12 @@ static int do_switch(struct intel_ring_buffer *ring,
/* obj is kept alive until the next request by its active ref */
i915_gem_object_ggtt_unpin(from->obj);
i915_gem_context_unreference(from);
+ } else {
+ if (to->is_initialized == false) {
+ ret = i915_gem_render_state_init(ring);
+ if (ret)
+ DRM_ERROR("init render state: %d\n", ret);
+ }
}
to->is_initialized = true;
diff --git a/drivers/gpu/drm/i915/i915_gem_render_state.c b/drivers/gpu/drm/i915/i915_gem_render_state.c
new file mode 100644
index 0000000..392aa7b
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_render_state.c
@@ -0,0 +1,194 @@
+/*
+ * 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@xxxxxxxxx>
+ *
+ */
+
+#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;
+}
diff --git a/drivers/gpu/drm/i915/intel_renderstate.h b/drivers/gpu/drm/i915/intel_renderstate.h
new file mode 100644
index 0000000..a5e783a
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_renderstate.h
@@ -0,0 +1,48 @@
+/*
+ * 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 */
diff --git a/drivers/gpu/drm/i915/intel_renderstate_gen6.c b/drivers/gpu/drm/i915/intel_renderstate_gen6.c
new file mode 100644
index 0000000..5ed251a
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_renderstate_gen6.c
@@ -0,0 +1,10 @@
+#include "intel_renderstate.h"
+
+static const u32 gen6_null_state_relocs[] = {
+};
+
+static const u32 gen6_null_state_batch[] = {
+ 0x0a << 23, /* MI_BATCH_BUFFER_END */
+};
+
+RO_RENDERSTATE(6);
diff --git a/drivers/gpu/drm/i915/intel_renderstate_gen7.c b/drivers/gpu/drm/i915/intel_renderstate_gen7.c
new file mode 100644
index 0000000..5333f44
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_renderstate_gen7.c
@@ -0,0 +1,10 @@
+#include "intel_renderstate.h"
+
+static const u32 gen7_null_state_relocs[] = {
+};
+
+static const u32 gen7_null_state_batch[] = {
+ 0x0a << 23, /* MI_BATCH_BUFFER_END */
+};
+
+RO_RENDERSTATE(7);
diff --git a/drivers/gpu/drm/i915/intel_renderstate_gen8.c b/drivers/gpu/drm/i915/intel_renderstate_gen8.c
new file mode 100644
index 0000000..88c3733
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_renderstate_gen8.c
@@ -0,0 +1,10 @@
+#include "intel_renderstate.h"
+
+static const u32 gen8_null_state_relocs[] = {
+};
+
+static const u32 gen8_null_state_batch[] = {
+ 0x0a << 23, /* MI_BATCH_BUFFER_END */
+};
+
+RO_RENDERSTATE(8);
--
1.7.9.5
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