drm/nouveau: import initial work on vbios performance table parsing
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_perf.c b/drivers/gpu/drm/nouveau/nouveau_perf.c
new file mode 100644
index 0000000..a882a36
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_perf.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright 2010 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
+ */
+
+#include "drmP.h"
+
+#include "nouveau_drv.h"
+#include "nouveau_pm.h"
+
+void
+nouveau_perf_init(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ struct nvbios *bios = &dev_priv->vbios;
+ struct bit_entry P;
+ u8 version, headerlen, recordlen, entries;
+ u8 *perf, *entry;
+ int vid, i;
+
+ if (bios->type == NVBIOS_BIT) {
+ if (bit_table(dev, 'P', &P))
+ return;
+
+ if (P.version != 1 && P.version != 2) {
+ NV_WARN(dev, "unknown perf for BIT P %d\n", P.version);
+ return;
+ }
+
+ perf = ROMPTR(bios, P.data[0]);
+ version = perf[0];
+ headerlen = perf[1];
+ if (version < 0x40) {
+ recordlen = perf[3] + (perf[4] * perf[5]);
+ entries = perf[2];
+ } else {
+ recordlen = perf[2] + (perf[3] * perf[4]);
+ entries = perf[5];
+ }
+ } else {
+ if (bios->data[bios->offset + 6] < 0x27) {
+ NV_DEBUG(dev, "BMP version too old for perf\n");
+ return;
+ }
+
+ perf = ROMPTR(bios, bios->data[bios->offset + 0x94]);
+ if (!perf) {
+ NV_DEBUG(dev, "perf table pointer invalid\n");
+ return;
+ }
+
+ version = perf[1];
+ headerlen = perf[0];
+ recordlen = perf[3];
+ entries = perf[2];
+ }
+
+ entry = perf + headerlen;
+ for (i = 0; i < entries; i++) {
+ struct nouveau_pm_level *perflvl = &pm->perflvl[pm->nr_perflvl];
+
+ if (entry[0] == 0xff) {
+ entry += recordlen;
+ continue;
+ }
+
+ switch (version) {
+ case 0x12:
+ case 0x13:
+ case 0x15:
+ perflvl->fanspeed = entry[55];
+ perflvl->voltage = entry[56];
+ perflvl->core = ROM32(entry[1]) / 100;
+ perflvl->memory = ROM32(entry[5]) / 100;
+ break;
+ case 0x21:
+ case 0x23:
+ case 0x24:
+ perflvl->fanspeed = entry[4];
+ perflvl->voltage = entry[5];
+ perflvl->core = ROM16(entry[6]);
+ perflvl->memory = ROM16(entry[11]);
+ break;
+ case 0x25:
+ perflvl->fanspeed = entry[4];
+ perflvl->voltage = entry[5];
+ perflvl->core = ROM16(entry[6]);
+ perflvl->shader = ROM16(entry[10]);
+ perflvl->memory = ROM16(entry[12]);
+ break;
+ case 0x30:
+ case 0x35:
+ perflvl->fanspeed = entry[6];
+ perflvl->voltage = entry[7];
+ perflvl->core = ROM16(entry[8]);
+ perflvl->shader = ROM16(entry[10]);
+ perflvl->memory = ROM16(entry[12]);
+ /*XXX: confirm on 0x35 */
+ perflvl->unk05 = ROM16(entry[16]);
+ break;
+ case 0x40:
+#define subent(n) entry[perf[2] + ((n) * perf[3])]
+ perflvl->fanspeed = 0; /*XXX*/
+ perflvl->voltage = 0; /*XXX: entry[2] */;
+ perflvl->core = ROM16(subent(0)) & 0xfff;
+ perflvl->shader = ROM16(subent(1)) & 0xfff;
+ perflvl->memory = ROM16(subent(2)) & 0xfff;
+ break;
+ }
+
+ /* convert MHz -> KHz, it's more convenient */
+ perflvl->core *= 1000;
+ perflvl->memory *= 1000;
+ perflvl->shader *= 1000;
+ perflvl->unk05 *= 1000;
+
+ /* make sure vid is valid */
+ if (pm->voltage.supported && perflvl->voltage) {
+ vid = nouveau_volt_vid_lookup(dev, perflvl->voltage);
+ if (vid < 0) {
+ NV_DEBUG(dev, "drop perflvl %d, bad vid\n", i);
+ entry += recordlen;
+ continue;
+ }
+ }
+
+ snprintf(perflvl->name, sizeof(perflvl->name),
+ "performance_level_%d", i);
+ perflvl->id = i;
+ pm->nr_perflvl++;
+
+ entry += recordlen;
+ }
+}
+
+void
+nouveau_perf_fini(struct drm_device *dev)
+{
+}