These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / engine / dma / base.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c b/kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c
new file mode 100644 (file)
index 0000000..9769fc0
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Ben Skeggs
+ */
+#include "priv.h"
+
+#include <core/client.h>
+#include <engine/fifo.h>
+
+#include <nvif/class.h>
+
+struct nvkm_dmaobj *
+nvkm_dma_search(struct nvkm_dma *dma, struct nvkm_client *client, u64 object)
+{
+       struct rb_node *node = client->dmaroot.rb_node;
+       while (node) {
+               struct nvkm_dmaobj *dmaobj =
+                       container_of(node, typeof(*dmaobj), rb);
+               if (object < dmaobj->handle)
+                       node = node->rb_left;
+               else
+               if (object > dmaobj->handle)
+                       node = node->rb_right;
+               else
+                       return dmaobj;
+       }
+       return NULL;
+}
+
+static int
+nvkm_dma_oclass_new(struct nvkm_device *device,
+                   const struct nvkm_oclass *oclass, void *data, u32 size,
+                   struct nvkm_object **pobject)
+{
+       struct nvkm_dma *dma = nvkm_dma(oclass->engine);
+       struct nvkm_dmaobj *dmaobj = NULL;
+       struct nvkm_client *client = oclass->client;
+       struct rb_node **ptr = &client->dmaroot.rb_node;
+       struct rb_node *parent = NULL;
+       int ret;
+
+       ret = dma->func->class_new(dma, oclass, data, size, &dmaobj);
+       if (dmaobj)
+               *pobject = &dmaobj->object;
+       if (ret)
+               return ret;
+
+       dmaobj->handle = oclass->object;
+
+       while (*ptr) {
+               struct nvkm_dmaobj *obj = container_of(*ptr, typeof(*obj), rb);
+               parent = *ptr;
+               if (dmaobj->handle < obj->handle)
+                       ptr = &parent->rb_left;
+               else
+               if (dmaobj->handle > obj->handle)
+                       ptr = &parent->rb_right;
+               else
+                       return -EEXIST;
+       }
+
+       rb_link_node(&dmaobj->rb, parent, ptr);
+       rb_insert_color(&dmaobj->rb, &client->dmaroot);
+       return 0;
+}
+
+static const struct nvkm_device_oclass
+nvkm_dma_oclass_base = {
+       .ctor = nvkm_dma_oclass_new,
+};
+
+static int
+nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size,
+                        struct nvkm_object **pobject)
+{
+       return nvkm_dma_oclass_new(oclass->engine->subdev.device,
+                                  oclass, data, size, pobject);
+}
+
+static const struct nvkm_sclass
+nvkm_dma_sclass[] = {
+       { 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
+       { 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
+       { 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
+};
+
+static int
+nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index,
+                        const struct nvkm_device_oclass **class)
+{
+       const int count = ARRAY_SIZE(nvkm_dma_sclass);
+       if (index < count) {
+               const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index];
+               sclass->base = oclass[0];
+               sclass->engn = oclass;
+               *class = &nvkm_dma_oclass_base;
+               return index;
+       }
+       return count;
+}
+
+static int
+nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index)
+{
+       const int count = ARRAY_SIZE(nvkm_dma_sclass);
+       if (index < count) {
+               oclass->base = nvkm_dma_sclass[index];
+               return index;
+       }
+       return count;
+}
+
+static void *
+nvkm_dma_dtor(struct nvkm_engine *engine)
+{
+       return nvkm_dma(engine);
+}
+
+static const struct nvkm_engine_func
+nvkm_dma = {
+       .dtor = nvkm_dma_dtor,
+       .base.sclass = nvkm_dma_oclass_base_get,
+       .fifo.sclass = nvkm_dma_oclass_fifo_get,
+};
+
+int
+nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device,
+             int index, struct nvkm_dma **pdma)
+{
+       struct nvkm_dma *dma;
+
+       if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL)))
+               return -ENOMEM;
+       dma->func = func;
+
+       return nvkm_engine_ctor(&nvkm_dma, device, index,
+                               0, true, &dma->engine);
+}