Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / bios / shadowramin.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
new file mode 100644 (file)
index 0000000..abe8ae4
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
@@ -0,0 +1,115 @@
+/*
+ * 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"
+
+#include <core/device.h>
+
+struct priv {
+       struct nvkm_bios *bios;
+       u32 bar0;
+};
+
+static u32
+pramin_read(void *data, u32 offset, u32 length, struct nvkm_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 nvkm_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,
+};