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 */ 23 #include "priv.h" 24 25 struct priv { 26 struct nvkm_bios *bios; 27 u32 bar0; 28 }; 29 30 static u32 31 pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) 32 { 33 struct nvkm_device *device = bios->subdev.device; 34 u32 i; 35 if (offset + length <= 0x00100000) { 36 for (i = offset; i < offset + length; i += 4) 37 *(u32 *)&bios->data[i] = nvkm_rd32(device, 0x700000 + i); 38 return length; 39 } 40 return 0; 41 } 42 43 static void 44 pramin_fini(void *data) 45 { 46 struct priv *priv = data; 47 if (priv) { 48 struct nvkm_device *device = priv->bios->subdev.device; 49 nvkm_wr32(device, 0x001700, priv->bar0); 50 kfree(priv); 51 } 52 } 53 54 static void * 55 pramin_init(struct nvkm_bios *bios, const char *name) 56 { 57 struct nvkm_subdev *subdev = &bios->subdev; 58 struct nvkm_device *device = subdev->device; 59 struct priv *priv = NULL; 60 u64 addr = 0; 61 62 /* PRAMIN always potentially available prior to nv50 */ 63 if (device->card_type < NV_50) 64 return NULL; 65 66 /* we can't get the bios image pointer without PDISP */ 67 if (device->card_type >= GM100) 68 addr = nvkm_rd32(device, 0x021c04); 69 else 70 if (device->card_type >= NV_C0) 71 addr = nvkm_rd32(device, 0x022500); 72 if (addr & 0x00000001) { 73 nvkm_debug(subdev, "... display disabled\n"); 74 return ERR_PTR(-ENODEV); 75 } 76 77 /* check that the window is enabled and in vram, particularly 78 * important as we don't want to be touching vram on an 79 * uninitialised board 80 */ 81 addr = nvkm_rd32(device, 0x619f04); 82 if (!(addr & 0x00000008)) { 83 nvkm_debug(subdev, "... not enabled\n"); 84 return ERR_PTR(-ENODEV); 85 } 86 if ( (addr & 0x00000003) != 1) { 87 nvkm_debug(subdev, "... not in vram\n"); 88 return ERR_PTR(-ENODEV); 89 } 90 91 /* some alternate method inherited from xf86-video-nv... */ 92 addr = (addr & 0xffffff00) << 8; 93 if (!addr) { 94 addr = (u64)nvkm_rd32(device, 0x001700) << 16; 95 addr += 0xf0000; 96 } 97 98 /* modify bar0 PRAMIN window to cover the bios image */ 99 if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) { 100 nvkm_error(subdev, "... out of memory\n"); 101 return ERR_PTR(-ENOMEM); 102 } 103 104 priv->bios = bios; 105 priv->bar0 = nvkm_rd32(device, 0x001700); 106 nvkm_wr32(device, 0x001700, addr >> 16); 107 return priv; 108 } 109 110 const struct nvbios_source 111 nvbios_ramin = { 112 .name = "PRAMIN", 113 .init = pramin_init, 114 .fini = pramin_fini, 115 .read = pramin_read, 116 .rw = true, 117 }; 118