124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
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/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "priv.h"
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struct priv {
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struct nvkm_bios *bios;
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u32 bar0;
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};
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static u32
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pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
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{
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struct nvkm_device *device = bios->subdev.device;
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u32 i;
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if (offset + length <= 0x00100000) {
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for (i = offset; i < offset + length; i += 4)
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*(u32 *)&bios->data[i] = nvkm_rd32(device, 0x700000 + i);
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return length;
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}
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return 0;
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}
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static void
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pramin_fini(void *data)
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{
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struct priv *priv = data;
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if (priv) {
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struct nvkm_device *device = priv->bios->subdev.device;
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nvkm_wr32(device, 0x001700, priv->bar0);
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kfree(priv);
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}
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}
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static void *
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pramin_init(struct nvkm_bios *bios, const char *name)
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{
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struct nvkm_subdev *subdev = &bios->subdev;
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struct nvkm_device *device = subdev->device;
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struct priv *priv = NULL;
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u64 addr = 0;
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/* PRAMIN always potentially available prior to nv50 */
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if (device->card_type < NV_50)
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return NULL;
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/* we can't get the bios image pointer without PDISP */
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if (device->card_type >= GA100)
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addr = device->chipset == 0x170; /*XXX: find the fuse reg for this */
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else
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if (device->card_type >= GM100)
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addr = nvkm_rd32(device, 0x021c04);
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else
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if (device->card_type >= NV_C0)
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addr = nvkm_rd32(device, 0x022500);
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if (addr & 0x00000001) {
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nvkm_debug(subdev, "... display disabled\n");
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return ERR_PTR(-ENODEV);
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}
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/* check that the window is enabled and in vram, particularly
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* important as we don't want to be touching vram on an
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* uninitialised board
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*/
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if (device->card_type >= GV100)
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addr = nvkm_rd32(device, 0x625f04);
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else
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addr = nvkm_rd32(device, 0x619f04);
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if (!(addr & 0x00000008)) {
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nvkm_debug(subdev, "... not enabled\n");
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return ERR_PTR(-ENODEV);
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}
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if ( (addr & 0x00000003) != 1) {
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nvkm_debug(subdev, "... not in vram\n");
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return ERR_PTR(-ENODEV);
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}
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/* some alternate method inherited from xf86-video-nv... */
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addr = (addr & 0xffffff00) << 8;
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if (!addr) {
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addr = (u64)nvkm_rd32(device, 0x001700) << 16;
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addr += 0xf0000;
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}
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/* modify bar0 PRAMIN window to cover the bios image */
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if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
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nvkm_error(subdev, "... out of memory\n");
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return ERR_PTR(-ENOMEM);
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}
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priv->bios = bios;
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priv->bar0 = nvkm_rd32(device, 0x001700);
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nvkm_wr32(device, 0x001700, addr >> 16);
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return priv;
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}
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const struct nvbios_source
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nvbios_ramin = {
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.name = "PRAMIN",
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.init = pramin_init,
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.fini = pramin_fini,
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.read = pramin_read,
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.rw = true,
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};
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