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/if0004.h>
  31 #include <nvif/ioctl.h>
  32 #include <nvif/unpack.h>
  33
  34 struct nv04_sw_chan {
  35         struct nvkm_sw_chan base;
  36         atomic_t ref;
  37 };
  38
  39 /*******************************************************************************
  40  * software object classes
  41  ******************************************************************************/
  42
  43 static int
  44 nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
  45 {
  46         struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
  47         union {
  48                 struct nv04_nvsw_get_ref_v0 v0;
  49         } *args = data;
  50         int ret = -ENOSYS;
  51
  52         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
  53                 args->v0.ref = atomic_read(&chan->ref);
  54         }
  55
  56         return ret;
  57 }
  58
  59 static int
  60 nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
  61 {
  62         switch (mthd) {
  63         case NV04_NVSW_GET_REF:
  64                 return nv04_nvsw_mthd_get_ref(nvsw, data, size);
  65         default:
  66                 break;
  67         }
  68         return -EINVAL;
  69 }
  70
  71 static const struct nvkm_nvsw_func
  72 nv04_nvsw = {
  73         .mthd = nv04_nvsw_mthd,
  74 };
  75
  76 static int
  77 nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
  78               void *data, u32 size, struct nvkm_object **pobject)
  79 {
  80         return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
  81 }
  82
  83 /*******************************************************************************
  84  * software context
  85  ******************************************************************************/
  86
  87 static bool
  88 nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
  89 {
  90         struct nv04_sw_chan *chan = nv04_sw_chan(base);
  91
  92         switch (mthd) {
  93         case 0x0150:
  94                 atomic_set(&chan->ref, data);
  95                 return true;
  96         default:
  97                 break;
  98         }
  99
 100         return false;
 101 }
 102
 103 static const struct nvkm_sw_chan_func
 104 nv04_sw_chan = {
 105         .mthd = nv04_sw_chan_mthd,
 106 };
 107
 108 static int
 109 nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifo,
 110                  const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
 111 {
 112         struct nv04_sw_chan *chan;
 113
 114         if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
 115                 return -ENOMEM;
 116         atomic_set(&chan->ref, 0);
 117         *pobject = &chan->base.object;
 118
 119         return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
 120 }
 121
 122 /*******************************************************************************
 123  * software engine/subdev functions
 124  ******************************************************************************/
 125
 126 static const struct nvkm_sw_func
 127 nv04_sw = {
 128         .chan_new = nv04_sw_chan_new,
 129         .sclass = {
 130                 { nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
 131                 {}
 132         }
 133 };
 134
 135 int
 136 nv04_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
 137 {
 138         return nvkm_sw_new_(&nv04_sw, device, index, psw);
 139 }