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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
new file mode 100644
index 000000000000..a7a890fad1e5
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
@@ -0,0 +1,114 @@
+/*
+ * 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;
+ if (priv) {
+ 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,
+};