diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c')
-rw-r--r-- | kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/base.c | 157 |
1 files changed, 157 insertions, 0 deletions
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 index 000000000..9769fc0d5 --- /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); +} |