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drm/nouveau: fix potential accuracy loss when parsing perf 0x1c tables

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Reported-by: Roy Spliet <r.spliet@student.tudelft.nl>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-09-18 22:13:04 +10:00
parent e022878571
commit 07b1266962
1 changed files with 14 additions and 20 deletions
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34
drivers/gpu/drm/nouveau/nouveau_perf.c
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@ -90,50 +90,44 @@ nouveau_perf_init(struct drm_device *dev)
case 0x15:
perflvl->fanspeed = entry[55];
perflvl->voltage = entry[56];
perflvl->core = ROM32(entry[1]) / 100;
perflvl->memory = ROM32(entry[5]) / 100;
perflvl->core = ROM32(entry[1]) * 10;
perflvl->memory = ROM32(entry[5]) * 10;
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]);
perflvl->core = ROM16(entry[6]) * 1000;
perflvl->memory = ROM16(entry[11]) * 1000;
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]);
perflvl->core = ROM16(entry[6]) * 1000;
perflvl->shader = ROM16(entry[10]) * 1000;
perflvl->memory = ROM16(entry[12]) * 1000;
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]);
perflvl->core = ROM16(entry[8]) * 1000;
perflvl->shader = ROM16(entry[10]) * 1000;
perflvl->memory = ROM16(entry[12]) * 1000;
/*XXX: confirm on 0x35 */
perflvl->unk05 = ROM16(entry[16]);
perflvl->unk05 = ROM16(entry[16]) * 1000;
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;
perflvl->core = (ROM16(subent(0)) & 0xfff) * 1000;
perflvl->shader = (ROM16(subent(1)) & 0xfff) * 1000;
perflvl->memory = (ROM16(subent(2)) & 0xfff) * 1000;
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);