Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/ramcfg.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/ramcfg.c
new file mode 100644 (file)
index 0000000..a17b221
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/ramcfg.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2013 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include <subdev/bios.h>
+#include <subdev/bios/bit.h>
+#include <subdev/bios/ramcfg.h>
+#include <subdev/bios/M0203.h>
+
+static u8
+nvbios_ramcfg_strap(struct nvkm_subdev *subdev)
+{
+       return (nv_rd32(subdev, 0x101000) & 0x0000003c) >> 2;
+}
+
+u8
+nvbios_ramcfg_count(struct nvkm_bios *bios)
+{
+       struct bit_entry bit_M;
+
+       if (!bit_entry(bios, 'M', &bit_M)) {
+               if (bit_M.version == 1 && bit_M.length >= 5)
+                       return nv_ro08(bios, bit_M.offset + 2);
+               if (bit_M.version == 2 && bit_M.length >= 3)
+                       return nv_ro08(bios, bit_M.offset + 0);
+       }
+
+       return 0x00;
+}
+
+u8
+nvbios_ramcfg_index(struct nvkm_subdev *subdev)
+{
+       struct nvkm_bios *bios = nvkm_bios(subdev);
+       u8 strap = nvbios_ramcfg_strap(subdev);
+       u32 xlat = 0x00000000;
+       struct bit_entry bit_M;
+       struct nvbios_M0203E M0203E;
+       u8 ver, hdr;
+
+       if (!bit_entry(bios, 'M', &bit_M)) {
+               if (bit_M.version == 1 && bit_M.length >= 5)
+                       xlat = nv_ro16(bios, bit_M.offset + 3);
+               if (bit_M.version == 2 && bit_M.length >= 3) {
+                       /*XXX: is M ever shorter than this?
+                        *     if not - what is xlat used for now?
+                        *     also - sigh..
+                        */
+                       if (bit_M.length >= 7 &&
+                           nvbios_M0203Em(bios, strap, &ver, &hdr, &M0203E))
+                               return M0203E.group;
+                       xlat = nv_ro16(bios, bit_M.offset + 1);
+               }
+       }
+
+       if (xlat)
+               strap = nv_ro08(bios, xlat + strap);
+       return strap;
+}