drm/nouveau: import initial work on vbios performance table parsing

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 159 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_perf.c b/drivers/gpu/drm/nouveau/nouveau_perf.c
new file mode 100644
index 00000000000..a882a366487
--- /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)
+{
+}