drivers/gpu/drm/nouveau/nv84_crypt.c

   1 /*
   2  * Copyright 2010 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
  25 #include "drmP.h"
  26 #include "nouveau_drv.h"
  27 #include "nouveau_util.h"
  28 #include "nouveau_vm.h"
  29 #include "nouveau_ramht.h"
  30
  31 struct nv84_crypt_engine {
  32         struct nouveau_exec_engine base;
  33 };
  34
  35 static int
  36 nv84_crypt_context_new(struct nouveau_channel *chan, int engine)
  37 {
  38         struct drm_device *dev = chan->dev;
  39         struct drm_nouveau_private *dev_priv = dev->dev_private;
  40         struct nouveau_gpuobj *ramin = chan->ramin;
  41         struct nouveau_gpuobj *ctx;
  42         int ret;
  43
  44         NV_DEBUG(dev, "ch%d\n", chan->id);
  45
  46         ret = nouveau_gpuobj_new(dev, chan, 256, 0, NVOBJ_FLAG_ZERO_ALLOC |
  47                                  NVOBJ_FLAG_ZERO_FREE, &ctx);
  48         if (ret)
  49                 return ret;
  50
  51         nv_wo32(ramin, 0xa0, 0x00190000);
  52         nv_wo32(ramin, 0xa4, ctx->vinst + ctx->size - 1);
  53         nv_wo32(ramin, 0xa8, ctx->vinst);
  54         nv_wo32(ramin, 0xac, 0);
  55         nv_wo32(ramin, 0xb0, 0);
  56         nv_wo32(ramin, 0xb4, 0);
  57         dev_priv->engine.instmem.flush(dev);
  58
  59         atomic_inc(&chan->vm->engref[engine]);
  60         chan->engctx[engine] = ctx;
  61         return 0;
  62 }
  63
  64 static void
  65 nv84_crypt_context_del(struct nouveau_channel *chan, int engine)
  66 {
  67         struct nouveau_gpuobj *ctx = chan->engctx[engine];
  68         struct drm_device *dev = chan->dev;
  69         u32 inst;
  70
  71         inst  = (chan->ramin->vinst >> 12);
  72         inst |= 0x80000000;
  73
  74         /* mark context as invalid if still on the hardware, not
  75          * doing this causes issues the next time PCRYPT is used,
  76          * unsurprisingly :)
  77          */
  78         nv_wr32(dev, 0x10200c, 0x00000000);
  79         if (nv_rd32(dev, 0x102188) == inst)
  80                 nv_mask(dev, 0x102188, 0x80000000, 0x00000000);
  81         if (nv_rd32(dev, 0x10218c) == inst)
  82                 nv_mask(dev, 0x10218c, 0x80000000, 0x00000000);
  83         nv_wr32(dev, 0x10200c, 0x00000010);
  84
  85         nouveau_gpuobj_ref(NULL, &ctx);
  86
  87         atomic_dec(&chan->vm->engref[engine]);
  88         chan->engctx[engine] = NULL;
  89 }
  90
  91 static int
  92 nv84_crypt_object_new(struct nouveau_channel *chan, int engine,
  93                       u32 handle, u16 class)
  94 {
  95         struct drm_device *dev = chan->dev;
  96         struct drm_nouveau_private *dev_priv = dev->dev_private;
  97         struct nouveau_gpuobj *obj = NULL;
  98         int ret;
  99
 100         ret = nouveau_gpuobj_new(dev, chan, 16, 16, NVOBJ_FLAG_ZERO_FREE, &obj);
 101         if (ret)
 102                 return ret;
 103         obj->engine = 5;
 104         obj->class  = class;
 105
 106         nv_wo32(obj, 0x00, class);
 107         dev_priv->engine.instmem.flush(dev);
 108
 109         ret = nouveau_ramht_insert(chan, handle, obj);
 110         nouveau_gpuobj_ref(NULL, &obj);
 111         return ret;
 112 }
 113
 114 static void
 115 nv84_crypt_tlb_flush(struct drm_device *dev, int engine)
 116 {
 117         nv50_vm_flush_engine(dev, 0x0a);
 118 }
 119
 120 static void
 121 nv84_crypt_isr(struct drm_device *dev)
 122 {
 123         u32 stat = nv_rd32(dev, 0x102130);
 124         u32 mthd = nv_rd32(dev, 0x102190);
 125         u32 data = nv_rd32(dev, 0x102194);
 126         u32 inst = nv_rd32(dev, 0x102188) & 0x7fffffff;
 127         int show = nouveau_ratelimit();
 128
 129         if (show) {
 130                 NV_INFO(dev, "PCRYPT_INTR: 0x%08x 0x%08x 0x%08x 0x%08x\n",
 131                              stat, mthd, data, inst);
 132         }
 133
 134         nv_wr32(dev, 0x102130, stat);
 135         nv_wr32(dev, 0x10200c, 0x10);
 136
 137         nv50_fb_vm_trap(dev, show);
 138 }
 139
 140 static int
 141 nv84_crypt_fini(struct drm_device *dev, int engine, bool suspend)
 142 {
 143         nv_wr32(dev, 0x102140, 0x00000000);
 144         return 0;
 145 }
 146
 147 static int
 148 nv84_crypt_init(struct drm_device *dev, int engine)
 149 {
 150         nv_mask(dev, 0x000200, 0x00004000, 0x00000000);
 151         nv_mask(dev, 0x000200, 0x00004000, 0x00004000);
 152
 153         nv_wr32(dev, 0x102130, 0xffffffff);
 154         nv_wr32(dev, 0x102140, 0xffffffbf);
 155
 156         nv_wr32(dev, 0x10200c, 0x00000010);
 157         return 0;
 158 }
 159
 160 static void
 161 nv84_crypt_destroy(struct drm_device *dev, int engine)
 162 {
 163         struct nv84_crypt_engine *pcrypt = nv_engine(dev, engine);
 164
 165         NVOBJ_ENGINE_DEL(dev, CRYPT);
 166
 167         nouveau_irq_unregister(dev, 14);
 168         kfree(pcrypt);
 169 }
 170
 171 int
 172 nv84_crypt_create(struct drm_device *dev)
 173 {
 174         struct nv84_crypt_engine *pcrypt;
 175
 176         pcrypt = kzalloc(sizeof(*pcrypt), GFP_KERNEL);
 177         if (!pcrypt)
 178                 return -ENOMEM;
 179
 180         pcrypt->base.destroy = nv84_crypt_destroy;
 181         pcrypt->base.init = nv84_crypt_init;
 182         pcrypt->base.fini = nv84_crypt_fini;
 183         pcrypt->base.context_new = nv84_crypt_context_new;
 184         pcrypt->base.context_del = nv84_crypt_context_del;
 185         pcrypt->base.object_new = nv84_crypt_object_new;
 186         pcrypt->base.tlb_flush = nv84_crypt_tlb_flush;
 187
 188         nouveau_irq_register(dev, 14, nv84_crypt_isr);
 189
 190         NVOBJ_ENGINE_ADD(dev, CRYPT, &pcrypt->base);
 191         NVOBJ_CLASS (dev, 0x74c1, CRYPT);
 192         return 0;
 193 }