drivers/gpu/drm/nouveau/nvkm/engine/sw/nv04.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 nv04_sw_chan(p) container_of((p), struct nv04_sw_chan, base)
  25 #include "priv.h"
  26 #include "chan.h"
  27 #include "nvsw.h"
  28
  29 #include <nvif/class.h>
  30 #include <nvif/ioctl.h>
  31 #include <nvif/unpack.h>
  32
  33 struct nv04_sw_chan {
  34         struct nvkm_sw_chan base;
  35         atomic_t ref;
  36 };
  37
  38 /*******************************************************************************
  39  * software object classes
  40  ******************************************************************************/
  41
  42 static int
  43 nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
  44 {
  45         struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
  46         union {
  47                 struct nv04_nvsw_get_ref_v0 v0;
  48         } *args = data;
  49         int ret;
  50
  51         if (nvif_unpack(args->v0, 0, 0, false)) {
  52                 args->v0.ref = atomic_read(&chan->ref);
  53         }
  54
  55         return ret;
  56 }
  57
  58 static int
  59 nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
  60 {
  61         switch (mthd) {
  62         case NV04_NVSW_GET_REF:
  63                 return nv04_nvsw_mthd_get_ref(nvsw, data, size);
  64         default:
  65                 break;
  66         }
  67         return -EINVAL;
  68 }
  69
  70 static const struct nvkm_nvsw_func
  71 nv04_nvsw = {
  72         .mthd = nv04_nvsw_mthd,
  73 };
  74
  75 static int
  76 nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
  77               void *data, u32 size, struct nvkm_object **pobject)
  78 {
  79         return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
  80 }
  81
  82 /*******************************************************************************
  83  * software context
  84  ******************************************************************************/
  85
  86 static bool
  87 nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
  88 {
  89         struct nv04_sw_chan *chan = nv04_sw_chan(base);
  90
  91         switch (mthd) {
  92         case 0x0150:
  93                 atomic_set(&chan->ref, data);
  94                 return true;
  95         default:
  96                 break;
  97         }
  98
  99         return false;
 100 }
 101
 102 static const struct nvkm_sw_chan_func
 103 nv04_sw_chan = {
 104         .mthd = nv04_sw_chan_mthd,
 105 };
 106
 107 static int
 108 nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifo,
 109                  const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
 110 {
 111         struct nv04_sw_chan *chan;
 112
 113         if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
 114                 return -ENOMEM;
 115         atomic_set(&chan->ref, 0);
 116         *pobject = &chan->base.object;
 117
 118         return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
 119 }
 120
 121 /*******************************************************************************
 122  * software engine/subdev functions
 123  ******************************************************************************/
 124
 125 static const struct nvkm_sw_func
 126 nv04_sw = {
 127         .chan_new = nv04_sw_chan_new,
 128         .sclass = {
 129                 { nv04_nvsw_new, { -1, -1, NVIF_IOCTL_NEW_V0_SW_NV04 } },
 130                 {}
 131         }
 132 };
 133
 134 int
 135 nv04_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
 136 {
 137         return nvkm_sw_new_(&nv04_sw, device, index, psw);
 138 }