cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.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
 */

#define nv04_dmaobj(p) container_of((p), struct nv04_dmaobj, base)
#include "user.h"

#include <core/gpuobj.h>
#include <subdev/fb.h>
#include <subdev/mmu/nv04.h>

#include <nvif/class.h>


struct nv04_dmaobj {
	
struct nvkm_dmaobj base;
	
bool clone;
	
u32 flags0;
	
u32 flags2;
};


static int nv04_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent, int align, struct nvkm_gpuobj **pgpuobj) { struct nv04_dmaobj *dmaobj = nv04_dmaobj(base); struct nvkm_device *device = dmaobj->base.dma->engine.subdev.device; u64 offset = dmaobj->base.start & 0xfffff000; u64 adjust = dmaobj->base.start & 0x00000fff; u32 length = dmaobj->base.limit - dmaobj->base.start; int ret; if (dmaobj->clone) { struct nv04_mmu *mmu = nv04_mmu(device->mmu); struct nvkm_memory *pgt = mmu->vm->pgt[0].mem[0]; if (!dmaobj->base.start) return nvkm_gpuobj_wrap(pgt, pgpuobj); nvkm_kmap(pgt); offset = nvkm_ro32(pgt, 8 + (offset >> 10)); offset &= 0xfffff000; nvkm_done(pgt); } ret = nvkm_gpuobj_new(device, 16, align, false, parent, pgpuobj); if (ret == 0) { nvkm_kmap(*pgpuobj); nvkm_wo32(*pgpuobj, 0x00, dmaobj->flags0 | (adjust << 20)); nvkm_wo32(*pgpuobj, 0x04, length); nvkm_wo32(*pgpuobj, 0x08, dmaobj->flags2 | offset); nvkm_wo32(*pgpuobj, 0x0c, dmaobj->flags2 | offset); nvkm_done(*pgpuobj); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs273100.00%13100.00%
Total273100.00%13100.00%

static const struct nvkm_dmaobj_func nv04_dmaobj_func = { .bind = nv04_dmaobj_bind, };
int nv04_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass, void *data, u32 size, struct nvkm_dmaobj **pdmaobj) { struct nvkm_device *device = dma->engine.subdev.device; struct nv04_dmaobj *dmaobj; int ret; if (!(dmaobj = kzalloc(sizeof(*dmaobj), GFP_KERNEL))) return -ENOMEM; *pdmaobj = &dmaobj->base; ret = nvkm_dmaobj_ctor(&nv04_dmaobj_func, dma, oclass, &data, &size, &dmaobj->base); if (ret) return ret; if (dmaobj->base.target == NV_MEM_TARGET_VM) { if (device->mmu->func == &nv04_mmu) dmaobj->clone = true; dmaobj->base.target = NV_MEM_TARGET_PCI; dmaobj->base.access = NV_MEM_ACCESS_RW; } dmaobj->flags0 = oclass->base.oclass; switch (dmaobj->base.target) { case NV_MEM_TARGET_VRAM: dmaobj->flags0 |= 0x00003000; break; case NV_MEM_TARGET_PCI: dmaobj->flags0 |= 0x00023000; break; case NV_MEM_TARGET_PCI_NOSNOOP: dmaobj->flags0 |= 0x00033000; break; default: return -EINVAL; } switch (dmaobj->base.access) { case NV_MEM_ACCESS_RO: dmaobj->flags0 |= 0x00004000; break; case NV_MEM_ACCESS_WO: dmaobj->flags0 |= 0x00008000; case NV_MEM_ACCESS_RW: dmaobj->flags2 |= 0x00000002; break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs257100.00%8100.00%
Total257100.00%8100.00%


Overall Contributors

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Ben Skeggs584100.00%16100.00%
Total584100.00%16100.00%
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