drivers/gpu/drm/nouveau/nouveau_grctx.c

   1 /*
   2  * Copyright 2009 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 <linux/firmware.h>
  26 #include <linux/slab.h>
  27
  28 #include "drmP.h"
  29 #include "nouveau_drv.h"
  30
  31 struct nouveau_ctxprog {
  32         uint32_t signature;
  33         uint8_t  version;
  34         uint16_t length;
  35         uint32_t data[];
  36 } __attribute__ ((packed));
  37
  38 struct nouveau_ctxvals {
  39         uint32_t signature;
  40         uint8_t  version;
  41         uint32_t length;
  42         struct {
  43                 uint32_t offset;
  44                 uint32_t value;
  45         } data[];
  46 } __attribute__ ((packed));
  47
  48 int
  49 nouveau_grctx_prog_load(struct drm_device *dev)
  50 {
  51         struct drm_nouveau_private *dev_priv = dev->dev_private;
  52         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
  53         const int chipset = dev_priv->chipset;
  54         const struct firmware *fw;
  55         const struct nouveau_ctxprog *cp;
  56         const struct nouveau_ctxvals *cv;
  57         char name[32];
  58         int ret, i;
  59
  60         if (pgraph->accel_blocked)
  61                 return -ENODEV;
  62
  63         if (!pgraph->ctxprog) {
  64                 sprintf(name, "nouveau/nv%02x.ctxprog", chipset);
  65                 ret = request_firmware(&fw, name, &dev->pdev->dev);
  66                 if (ret) {
  67                         NV_ERROR(dev, "No ctxprog for NV%02x\n", chipset);
  68                         return ret;
  69                 }
  70
  71                 pgraph->ctxprog = kmalloc(fw->size, GFP_KERNEL);
  72                 if (!pgraph->ctxprog) {
  73                         NV_ERROR(dev, "OOM copying ctxprog\n");
  74                         release_firmware(fw);
  75                         return -ENOMEM;
  76                 }
  77                 memcpy(pgraph->ctxprog, fw->data, fw->size);
  78
  79                 cp = pgraph->ctxprog;
  80                 if (le32_to_cpu(cp->signature) != 0x5043564e ||
  81                     cp->version != 0 ||
  82                     le16_to_cpu(cp->length) != ((fw->size - 7) / 4)) {
  83                         NV_ERROR(dev, "ctxprog invalid\n");
  84                         release_firmware(fw);
  85                         nouveau_grctx_fini(dev);
  86                         return -EINVAL;
  87                 }
  88                 release_firmware(fw);
  89         }
  90
  91         if (!pgraph->ctxvals) {
  92                 sprintf(name, "nouveau/nv%02x.ctxvals", chipset);
  93                 ret = request_firmware(&fw, name, &dev->pdev->dev);
  94                 if (ret) {
  95                         NV_ERROR(dev, "No ctxvals for NV%02x\n", chipset);
  96                         nouveau_grctx_fini(dev);
  97                         return ret;
  98                 }
  99
 100                 pgraph->ctxvals = kmalloc(fw->size, GFP_KERNEL);
 101                 if (!pgraph->ctxvals) {
 102                         NV_ERROR(dev, "OOM copying ctxvals\n");
 103                         release_firmware(fw);
 104                         nouveau_grctx_fini(dev);
 105                         return -ENOMEM;
 106                 }
 107                 memcpy(pgraph->ctxvals, fw->data, fw->size);
 108
 109                 cv = (void *)pgraph->ctxvals;
 110                 if (le32_to_cpu(cv->signature) != 0x5643564e ||
 111                     cv->version != 0 ||
 112                     le32_to_cpu(cv->length) != ((fw->size - 9) / 8)) {
 113                         NV_ERROR(dev, "ctxvals invalid\n");
 114                         release_firmware(fw);
 115                         nouveau_grctx_fini(dev);
 116                         return -EINVAL;
 117                 }
 118                 release_firmware(fw);
 119         }
 120
 121         cp = pgraph->ctxprog;
 122
 123         nv_wr32(dev, NV40_PGRAPH_CTXCTL_UCODE_INDEX, 0);
 124         for (i = 0; i < le16_to_cpu(cp->length); i++)
 125                 nv_wr32(dev, NV40_PGRAPH_CTXCTL_UCODE_DATA,
 126                         le32_to_cpu(cp->data[i]));
 127
 128         return 0;
 129 }
 130
 131 void
 132 nouveau_grctx_fini(struct drm_device *dev)
 133 {
 134         struct drm_nouveau_private *dev_priv = dev->dev_private;
 135         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
 136
 137         if (pgraph->ctxprog) {
 138                 kfree(pgraph->ctxprog);
 139                 pgraph->ctxprog = NULL;
 140         }
 141
 142         if (pgraph->ctxvals) {
 143                 kfree(pgraph->ctxprog);
 144                 pgraph->ctxvals = NULL;
 145         }
 146 }
 147
 148 void
 149 nouveau_grctx_vals_load(struct drm_device *dev, struct nouveau_gpuobj *ctx)
 150 {
 151         struct drm_nouveau_private *dev_priv = dev->dev_private;
 152         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
 153         struct nouveau_ctxvals *cv = pgraph->ctxvals;
 154         int i;
 155
 156         if (!cv)
 157                 return;
 158
 159         for (i = 0; i < le32_to_cpu(cv->length); i++)
 160                 nv_wo32(dev, ctx, le32_to_cpu(cv->data[i].offset),
 161                         le32_to_cpu(cv->data[i].value));
 162 }