cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/engine/dma/user.c

/*
 * 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 "user.h"

#include <core/client.h>
#include <core/gpuobj.h>
#include <subdev/fb.h>
#include <subdev/instmem.h>

#include <nvif/cl0002.h>
#include <nvif/unpack.h>


static const struct nvkm_object_func nvkm_dmaobj_func;

struct nvkm_dmaobj * nvkm_dmaobj_search(struct nvkm_client *client, u64 handle) { struct nvkm_object *object; object = nvkm_object_search(client, handle, &nvkm_dmaobj_func); if (IS_ERR(object)) return (void *)object; return nvkm_dmaobj(object); }

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static int nvkm_dmaobj_bind(struct nvkm_object *base, struct nvkm_gpuobj *gpuobj, int align, struct nvkm_gpuobj **pgpuobj) { struct nvkm_dmaobj *dmaobj = nvkm_dmaobj(base); return dmaobj->func->bind(dmaobj, gpuobj, align, pgpuobj); }

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static void * nvkm_dmaobj_dtor(struct nvkm_object *base) { return nvkm_dmaobj(base); }

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static const struct nvkm_object_func nvkm_dmaobj_func = { .dtor = nvkm_dmaobj_dtor, .bind = nvkm_dmaobj_bind, };
int nvkm_dmaobj_ctor(const struct nvkm_dmaobj_func *func, struct nvkm_dma *dma, const struct nvkm_oclass *oclass, void **pdata, u32 *psize, struct nvkm_dmaobj *dmaobj) { union { struct nv_dma_v0 v0; } *args = *pdata; struct nvkm_device *device = dma->engine.subdev.device; struct nvkm_client *client = oclass->client; struct nvkm_object *parent = oclass->parent; struct nvkm_instmem *instmem = device->imem; struct nvkm_fb *fb = device->fb; void *data = *pdata; u32 size = *psize; int ret = -ENOSYS; nvkm_object_ctor(&nvkm_dmaobj_func, oclass, &dmaobj->object); dmaobj->func = func; dmaobj->dma = dma; nvif_ioctl(parent, "create dma size %d\n", *psize); if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) { nvif_ioctl(parent, "create dma vers %d target %d access %d " "start %016llx limit %016llx\n", args->v0.version, args->v0.target, args->v0.access, args->v0.start, args->v0.limit); dmaobj->target = args->v0.target; dmaobj->access = args->v0.access; dmaobj->start = args->v0.start; dmaobj->limit = args->v0.limit; } else return ret; *pdata = data; *psize = size; if (dmaobj->start > dmaobj->limit) return -EINVAL; switch (dmaobj->target) { case NV_DMA_V0_TARGET_VM: dmaobj->target = NV_MEM_TARGET_VM; break; case NV_DMA_V0_TARGET_VRAM: if (!client->super) { if (dmaobj->limit >= fb->ram->size - instmem->reserved) return -EACCES; if (device->card_type >= NV_50) return -EACCES; } dmaobj->target = NV_MEM_TARGET_VRAM; break; case NV_DMA_V0_TARGET_PCI: if (!client->super) return -EACCES; dmaobj->target = NV_MEM_TARGET_PCI; break; case NV_DMA_V0_TARGET_PCI_US: case NV_DMA_V0_TARGET_AGP: if (!client->super) return -EACCES; dmaobj->target = NV_MEM_TARGET_PCI_NOSNOOP; break; default: return -EINVAL; } switch (dmaobj->access) { case NV_DMA_V0_ACCESS_VM: dmaobj->access = NV_MEM_ACCESS_VM; break; case NV_DMA_V0_ACCESS_RD: dmaobj->access = NV_MEM_ACCESS_RO; break; case NV_DMA_V0_ACCESS_WR: dmaobj->access = NV_MEM_ACCESS_WO; break; case NV_DMA_V0_ACCESS_RDWR: dmaobj->access = NV_MEM_ACCESS_RW; break; default: return -EINVAL; } return ret; }

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Ben Skeggs463100.00%9100.00%
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Ben Skeggs630100.00%12100.00%
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