LXR linux/drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv50.c

   1/*
   2 * Copyright 2012 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: Ben Skeggs
  23 */
  24#define nv50_dmaobj(p) container_of((p), struct nv50_dmaobj, base)
  25#include "user.h"
  26
  27#include <core/client.h>
  28#include <core/gpuobj.h>
  29#include <subdev/fb.h>
  30
  31#include <nvif/cl0002.h>
  32#include <nvif/unpack.h>
  33
  34struct nv50_dmaobj {
  35        struct nvkm_dmaobj base;
  36        u32 flags0;
  37        u32 flags5;
  38};
  39
  40static int
  41nv50_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent,
  42                 int align, struct nvkm_gpuobj **pgpuobj)
  43{
  44        struct nv50_dmaobj *dmaobj = nv50_dmaobj(base);
  45        struct nvkm_device *device = dmaobj->base.dma->engine.subdev.device;
  46        int ret;
  47
  48        ret = nvkm_gpuobj_new(device, 24, align, false, parent, pgpuobj);
  49        if (ret == 0) {
  50                nvkm_kmap(*pgpuobj);
  51                nvkm_wo32(*pgpuobj, 0x00, dmaobj->flags0);
  52                nvkm_wo32(*pgpuobj, 0x04, lower_32_bits(dmaobj->base.limit));
  53                nvkm_wo32(*pgpuobj, 0x08, lower_32_bits(dmaobj->base.start));
  54                nvkm_wo32(*pgpuobj, 0x0c, upper_32_bits(dmaobj->base.limit) << 24 |
  55                                          upper_32_bits(dmaobj->base.start));
  56                nvkm_wo32(*pgpuobj, 0x10, 0x00000000);
  57                nvkm_wo32(*pgpuobj, 0x14, dmaobj->flags5);
  58                nvkm_done(*pgpuobj);
  59        }
  60
  61        return ret;
  62}
  63
  64static const struct nvkm_dmaobj_func
  65nv50_dmaobj_func = {
  66        .bind = nv50_dmaobj_bind,
  67};
  68
  69int
  70nv50_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass,
  71                void *data, u32 size, struct nvkm_dmaobj **pdmaobj)
  72{
  73        union {
  74                struct nv50_dma_v0 v0;
  75        } *args;
  76        struct nvkm_object *parent = oclass->parent;
  77        struct nv50_dmaobj *dmaobj;
  78        u32 user, part, comp, kind;
  79        int ret;
  80
  81        if (!(dmaobj = kzalloc(sizeof(*dmaobj), GFP_KERNEL)))
  82                return -ENOMEM;
  83        *pdmaobj = &dmaobj->base;
  84
  85        ret = nvkm_dmaobj_ctor(&nv50_dmaobj_func, dma, oclass,
  86                               &data, &size, &dmaobj->base);
  87        if (ret)
  88                return ret;
  89
  90        ret  = -ENOSYS;
  91        args = data;
  92
  93        nvif_ioctl(parent, "create nv50 dma size %d\n", size);
  94        if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
  95                nvif_ioctl(parent, "create nv50 dma vers %d priv %d part %d "
  96                                   "comp %d kind %02x\n", args->v0.version,
  97                           args->v0.priv, args->v0.part, args->v0.comp,
  98                           args->v0.kind);
  99                user = args->v0.priv;
 100                part = args->v0.part;
 101                comp = args->v0.comp;
 102                kind = args->v0.kind;
 103        } else
 104        if (size == 0) {
 105                if (dmaobj->base.target != NV_MEM_TARGET_VM) {
 106                        user = NV50_DMA_V0_PRIV_US;
 107                        part = NV50_DMA_V0_PART_256;
 108                        comp = NV50_DMA_V0_COMP_NONE;
 109                        kind = NV50_DMA_V0_KIND_PITCH;
 110                } else {
 111                        user = NV50_DMA_V0_PRIV_VM;
 112                        part = NV50_DMA_V0_PART_VM;
 113                        comp = NV50_DMA_V0_COMP_VM;
 114                        kind = NV50_DMA_V0_KIND_VM;
 115                }
 116        } else
 117                return ret;
 118
 119        if (user > 2 || part > 2 || comp > 3 || kind > 0x7f)
 120                return -EINVAL;
 121        dmaobj->flags0 = (comp << 29) | (kind << 22) | (user << 20) |
 122                         oclass->base.oclass;
 123        dmaobj->flags5 = (part << 16);
 124
 125        switch (dmaobj->base.target) {
 126        case NV_MEM_TARGET_VM:
 127                dmaobj->flags0 |= 0x00000000;
 128                break;
 129        case NV_MEM_TARGET_VRAM:
 130                dmaobj->flags0 |= 0x00010000;
 131                break;
 132        case NV_MEM_TARGET_PCI:
 133                dmaobj->flags0 |= 0x00020000;
 134                break;
 135        case NV_MEM_TARGET_PCI_NOSNOOP:
 136                dmaobj->flags0 |= 0x00030000;
 137                break;
 138        default:
 139                return -EINVAL;
 140        }
 141
 142        switch (dmaobj->base.access) {
 143        case NV_MEM_ACCESS_VM:
 144                break;
 145        case NV_MEM_ACCESS_RO:
 146                dmaobj->flags0 |= 0x00040000;
 147                break;
 148        case NV_MEM_ACCESS_WO:
 149        case NV_MEM_ACCESS_RW:
 150                dmaobj->flags0 |= 0x00080000;
 151                break;
 152        default:
 153                return -EINVAL;
 154        }
 155
 156        return 0;
 157}
 158