drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c

   1 /*
   2  * Copyright 2014 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 <bskeggs@redhat.com>
  23  */
  24 #include <subdev/bios.h>
  25 #include <subdev/bios/bit.h>
  26 #include <subdev/bios/image.h>
  27 #include <subdev/bios/pmu.h>
  28
  29 static u32
  30 weirdo_pointer(struct nvkm_bios *bios, u32 data)
  31 {
  32         struct nvbios_image image;
  33         int idx = 0;
  34         if (nvbios_image(bios, idx++, &image)) {
  35                 data -= image.size;
  36                 while (nvbios_image(bios, idx++, &image)) {
  37                         if (image.type == 0xe0)
  38                                 return image.base + data;
  39                 }
  40         }
  41         return 0;
  42 }
  43
  44 u32
  45 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  46 {
  47         struct bit_entry bit_p;
  48         u32 data = 0;
  49
  50         if (!bit_entry(bios, 'p', &bit_p)) {
  51                 if (bit_p.version == 2 && bit_p.length >= 4)
  52                         data = nvbios_rd32(bios, bit_p.offset + 0x00);
  53                 if ((data = weirdo_pointer(bios, data))) {
  54                         *ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
  55                         *hdr = nvbios_rd08(bios, data + 0x01);
  56                         *len = nvbios_rd08(bios, data + 0x02);
  57                         *cnt = nvbios_rd08(bios, data + 0x03);
  58                 }
  59         }
  60
  61         return data;
  62 }
  63
  64 u32
  65 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
  66 {
  67         u8  cnt, len;
  68         u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
  69         if (data && idx < cnt) {
  70                 data = data + *hdr + (idx * len);
  71                 *hdr = len;
  72                 return data;
  73         }
  74         return 0;
  75 }
  76
  77 u32
  78 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
  79              struct nvbios_pmuE *info)
  80 {
  81         u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
  82         memset(info, 0x00, sizeof(*info));
  83         switch (!!data * *ver) {
  84         default:
  85                 info->type = nvbios_rd08(bios, data + 0x00);
  86                 info->data = nvbios_rd32(bios, data + 0x02);
  87                 break;
  88         }
  89         return data;
  90 }
  91
  92 bool
  93 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
  94 {
  95         struct nvbios_pmuE pmuE;
  96         u8  ver, hdr, idx = 0;
  97         u32 data;
  98         memset(info, 0x00, sizeof(*info));
  99         while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
 100                 if ( pmuE.type == type &&
 101                     (data = weirdo_pointer(bios, pmuE.data))) {
 102                         info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
 103                         info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
 104                         info->boot_addr     = data + 0x30;
 105                         info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
 106                                               nvbios_rd32(bios, data + 0x18);
 107                         info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
 108                                               nvbios_rd32(bios, data + 0x18);
 109                         info->code_addr     = info->boot_addr + info->boot_size;
 110                         info->code_addr_pmu = info->boot_addr_pmu +
 111                                               info->boot_size;
 112                         info->code_size     = nvbios_rd32(bios, data + 0x20);
 113                         info->data_addr     = data + 0x30 +
 114                                               nvbios_rd32(bios, data + 0x24);
 115                         info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
 116                         info->data_size     = nvbios_rd32(bios, data + 0x2c);
 117                         return true;
 118                 }
 119         }
 120         return false;
 121 }