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path: root/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c
new file mode 100644
index 000000000000..9769fc0d5351
--- /dev/null
+++ b/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);
+}