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 u32
  30 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  31 {
  32         struct bit_entry bit_p;
  33         u32 data = 0;
  34
  35         if (!bit_entry(bios, 'p', &bit_p)) {
  36                 if (bit_p.version == 2 && bit_p.length >= 4)
  37                         data = nvbios_rd32(bios, bit_p.offset + 0x00);
  38                 if (data) {
  39                         *ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
  40                         *hdr = nvbios_rd08(bios, data + 0x01);
  41                         *len = nvbios_rd08(bios, data + 0x02);
  42                         *cnt = nvbios_rd08(bios, data + 0x03);
  43                 }
  44         }
  45
  46         return data;
  47 }
  48
  49 u32
  50 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
  51 {
  52         u8  cnt, len;
  53         u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
  54         if (data && idx < cnt) {
  55                 data = data + *hdr + (idx * len);
  56                 *hdr = len;
  57                 return data;
  58         }
  59         return 0;
  60 }
  61
  62 u32
  63 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
  64              struct nvbios_pmuE *info)
  65 {
  66         u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
  67         memset(info, 0x00, sizeof(*info));
  68         switch (!!data * *ver) {
  69         default:
  70                 info->type = nvbios_rd08(bios, data + 0x00);
  71                 info->data = nvbios_rd32(bios, data + 0x02);
  72                 break;
  73         }
  74         return data;
  75 }
  76
  77 bool
  78 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
  79 {
  80         struct nvbios_pmuE pmuE;
  81         u8  ver, hdr, idx = 0;
  82         u32 data;
  83         memset(info, 0x00, sizeof(*info));
  84         while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
  85                 if (pmuE.type == type && (data = pmuE.data)) {
  86                         info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
  87                         info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
  88                         info->boot_addr     = data + 0x30;
  89                         info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
  90                                               nvbios_rd32(bios, data + 0x18);
  91                         info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
  92                                               nvbios_rd32(bios, data + 0x18);
  93                         info->code_addr     = info->boot_addr + info->boot_size;
  94                         info->code_addr_pmu = info->boot_addr_pmu +
  95                                               info->boot_size;
  96                         info->code_size     = nvbios_rd32(bios, data + 0x20);
  97                         info->data_addr     = data + 0x30 +
  98                                               nvbios_rd32(bios, data + 0x24);
  99                         info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
 100                         info->data_size     = nvbios_rd32(bios, data + 0x2c);
 101                         return true;
 102                 }
 103         }
 104         return false;
 105 }