kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/usergf119.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 gf119_dmaobj(p) container_of((p), struct gf119_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/class.h>
  32 #include <nvif/unpack.h>
  33
  34 struct gf119_dmaobj {
  35         struct nvkm_dmaobj base;
  36         u32 flags0;
  37 };
  38
  39 static int
  40 gf119_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent,
  41                   int align, struct nvkm_gpuobj **pgpuobj)
  42 {
  43         struct gf119_dmaobj *dmaobj = gf119_dmaobj(base);
  44         struct nvkm_device *device = dmaobj->base.dma->engine.subdev.device;
  45         int ret;
  46
  47         ret = nvkm_gpuobj_new(device, 24, align, false, parent, pgpuobj);
  48         if (ret == 0) {
  49                 nvkm_kmap(*pgpuobj);
  50                 nvkm_wo32(*pgpuobj, 0x00, dmaobj->flags0);
  51                 nvkm_wo32(*pgpuobj, 0x04, dmaobj->base.start >> 8);
  52                 nvkm_wo32(*pgpuobj, 0x08, dmaobj->base.limit >> 8);
  53                 nvkm_wo32(*pgpuobj, 0x0c, 0x00000000);
  54                 nvkm_wo32(*pgpuobj, 0x10, 0x00000000);
  55                 nvkm_wo32(*pgpuobj, 0x14, 0x00000000);
  56                 nvkm_done(*pgpuobj);
  57         }
  58
  59         return ret;
  60 }
  61
  62 static const struct nvkm_dmaobj_func
  63 gf119_dmaobj_func = {
  64         .bind = gf119_dmaobj_bind,
  65 };
  66
  67 int
  68 gf119_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass,
  69                  void *data, u32 size, struct nvkm_dmaobj **pdmaobj)
  70 {
  71         union {
  72                 struct gf119_dma_v0 v0;
  73         } *args;
  74         struct nvkm_object *parent = oclass->parent;
  75         struct gf119_dmaobj *dmaobj;
  76         u32 kind, page;
  77         int ret;
  78
  79         if (!(dmaobj = kzalloc(sizeof(*dmaobj), GFP_KERNEL)))
  80                 return -ENOMEM;
  81         *pdmaobj = &dmaobj->base;
  82
  83         ret = nvkm_dmaobj_ctor(&gf119_dmaobj_func, dma, oclass,
  84                                &data, &size, &dmaobj->base);
  85         if (ret)
  86                 return ret;
  87
  88         args = data;
  89
  90         nvif_ioctl(parent, "create gf119 dma size %d\n", size);
  91         if (nvif_unpack(args->v0, 0, 0, false)) {
  92                 nvif_ioctl(parent,
  93                            "create gf100 dma vers %d page %d kind %02x\n",
  94                            args->v0.version, args->v0.page, args->v0.kind);
  95                 kind = args->v0.kind;
  96                 page = args->v0.page;
  97         } else
  98         if (size == 0) {
  99                 if (dmaobj->base.target != NV_MEM_TARGET_VM) {
 100                         kind = GF119_DMA_V0_KIND_PITCH;
 101                         page = GF119_DMA_V0_PAGE_SP;
 102                 } else {
 103                         kind = GF119_DMA_V0_KIND_VM;
 104                         page = GF119_DMA_V0_PAGE_LP;
 105                 }
 106         } else
 107                 return ret;
 108
 109         if (page > 1)
 110                 return -EINVAL;
 111         dmaobj->flags0 = (kind << 20) | (page << 6);
 112
 113         switch (dmaobj->base.target) {
 114         case NV_MEM_TARGET_VRAM:
 115                 dmaobj->flags0 |= 0x00000009;
 116                 break;
 117         case NV_MEM_TARGET_VM:
 118         case NV_MEM_TARGET_PCI:
 119         case NV_MEM_TARGET_PCI_NOSNOOP:
 120                 /* XXX: don't currently know how to construct a real one
 121                  *      of these.  we only use them to represent pushbufs
 122                  *      on these chipsets, and the classes that use them
 123                  *      deal with the target themselves.
 124                  */
 125                 break;
 126         default:
 127                 return -EINVAL;
 128         }
 129
 130         return 0;
 131 }