diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/bios/shadowramin.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/bios/shadowramin.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/shadowramin.c b/drivers/gpu/drm/nouveau/core/subdev/bios/shadowramin.c new file mode 100644 index 000000000000..5e58bba0dd5c --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/bios/shadowramin.c @@ -0,0 +1,112 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + */ + +#include "priv.h" + +struct priv { + struct nouveau_bios *bios; + u32 bar0; +}; + +static u32 +pramin_read(void *data, u32 offset, u32 length, struct nouveau_bios *bios) +{ + u32 i; + if (offset + length <= 0x00100000) { + for (i = offset; i < offset + length; i += 4) + *(u32 *)&bios->data[i] = nv_rd32(bios, 0x700000 + i); + return length; + } + return 0; +} + +static void +pramin_fini(void *data) +{ + struct priv *priv = data; + nv_wr32(priv->bios, 0x001700, priv->bar0); + kfree(priv); +} + +static void * +pramin_init(struct nouveau_bios *bios, const char *name) +{ + struct priv *priv = NULL; + u64 addr = 0; + + /* PRAMIN always potentially available prior to nv50 */ + if (nv_device(bios)->card_type < NV_50) + return NULL; + + /* we can't get the bios image pointer without PDISP */ + if (nv_device(bios)->card_type >= GM100) + addr = nv_rd32(bios, 0x021c04); + else + if (nv_device(bios)->card_type >= NV_C0) + addr = nv_rd32(bios, 0x022500); + if (addr & 0x00000001) { + nv_debug(bios, "... display disabled\n"); + return ERR_PTR(-ENODEV); + } + + /* check that the window is enabled and in vram, particularly + * important as we don't want to be touching vram on an + * uninitialised board + */ + addr = nv_rd32(bios, 0x619f04); + if (!(addr & 0x00000008)) { + nv_debug(bios, "... not enabled\n"); + return ERR_PTR(-ENODEV); + } + if ( (addr & 0x00000003) != 1) { + nv_debug(bios, "... not in vram\n"); + return ERR_PTR(-ENODEV); + } + + /* some alternate method inherited from xf86-video-nv... */ + addr = (addr & 0xffffff00) << 8; + if (!addr) { + addr = (u64)nv_rd32(bios, 0x001700) << 16; + addr += 0xf0000; + } + + /* modify bar0 PRAMIN window to cover the bios image */ + if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) { + nv_error(bios, "... out of memory\n"); + return ERR_PTR(-ENOMEM); + } + + priv->bios = bios; + priv->bar0 = nv_rd32(bios, 0x001700); + nv_wr32(bios, 0x001700, addr >> 16); + return priv; +} + +const struct nvbios_source +nvbios_ramin = { + .name = "PRAMIN", + .init = pramin_init, + .fini = pramin_fini, + .read = pramin_read, + .rw = true, +}; |