drivers/gpu/drm/nouveau/nouveau_perf.c - linux - Git at Google

 /*
  * 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 <drm/drmP.h>

 #include "nouveau_drm.h"
 #include "nouveau_reg.h"
 #include "nouveau_pm.h"

 static u8 *
 nouveau_perf_table(struct drm_device *dev, u8 *ver)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvbios *bios = &drm->vbios;
 	struct bit_entry P;

 	if (!bit_table(dev, 'P', &P) && P.version && P.version <= 2) {
 		u8 *perf = ROMPTR(dev, P.data[0]);
 		if (perf) {
 			*ver = perf[0];
 			return perf;
 		}
 	}

 	if (bios->type == NVBIOS_BMP) {
 		if (bios->data[bios->offset + 6] >= 0x25) {
 			u8 *perf = ROMPTR(dev, bios->data[bios->offset + 0x94]);
 			if (perf) {
 				*ver = perf[1];
 				return perf;
 			}
 		}
 	}

 	return NULL;
 }

 static u8 *
 nouveau_perf_entry(struct drm_device *dev, int idx,
 		   u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 {
 	u8 *perf = nouveau_perf_table(dev, ver);
 	if (perf) {
 		if (*ver >= 0x12 && *ver < 0x20 && idx < perf[2]) {
 			*hdr = perf[3];
 			*cnt = 0;
 			*len = 0;
 			return perf + perf[0] + idx * perf[3];
 		} else
 		if (*ver >= 0x20 && *ver < 0x40 && idx < perf[2]) {
 			*hdr = perf[3];
 			*cnt = perf[4];
 			*len = perf[5];
 			return perf + perf[1] + idx * (*hdr + (*cnt * *len));
 		} else
 		if (*ver >= 0x40 && *ver < 0x41 && idx < perf[5]) {
 			*hdr = perf[2];
 			*cnt = perf[4];
 			*len = perf[3];
 			return perf + perf[1] + idx * (*hdr + (*cnt * *len));
 		}
 	}
 	return NULL;
 }

 u8 *
 nouveau_perf_rammap(struct drm_device *dev, u32 freq,
 		    u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct bit_entry P;
 	u8 *perf, i = 0;

 	if (!bit_table(dev, 'P', &P) && P.version == 2) {
 		u8 *rammap = ROMPTR(dev, P.data[4]);
 		if (rammap) {
 			u8 *ramcfg = rammap + rammap[1];

 			*ver = rammap[0];
 			*hdr = rammap[2];
 			*cnt = rammap[4];
 			*len = rammap[3];

 			freq /= 1000;
 			for (i = 0; i < rammap[5]; i++) {
 				if (freq >= ROM16(ramcfg[0]) &&
 				    freq <= ROM16(ramcfg[2]))
 					return ramcfg;

 				ramcfg += *hdr + (*cnt * *len);
 			}
 		}

 		return NULL;
 	}

 	if (nv_device(drm->device)->chipset == 0x49 ||
 	    nv_device(drm->device)->chipset == 0x4b)
 		freq /= 2;

 	while ((perf = nouveau_perf_entry(dev, i++, ver, hdr, cnt, len))) {
 		if (*ver >= 0x20 && *ver < 0x25) {
 			if (perf[0] != 0xff && freq <= ROM16(perf[11]) * 1000)
 				break;
 		} else
 		if (*ver >= 0x25 && *ver < 0x40) {
 			if (perf[0] != 0xff && freq <= ROM16(perf[12]) * 1000)
 				break;
 		}
 	}

 	if (perf) {
 		u8 *ramcfg = perf + *hdr;
 		*ver = 0x00;
 		*hdr = 0;
 		return ramcfg;
 	}

 	return NULL;
 }

 u8 *
 nouveau_perf_ramcfg(struct drm_device *dev, u32 freq, u8 *ver, u8 *len)
 {
 	struct nouveau_device *device = nouveau_dev(dev);
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvbios *bios = &drm->vbios;
 	u8 strap, hdr, cnt;
 	u8 *rammap;

 	strap = (nv_rd32(device, 0x101000) & 0x0000003c) >> 2;
 	if (bios->ram_restrict_tbl_ptr)
 		strap = bios->data[bios->ram_restrict_tbl_ptr + strap];

 	rammap = nouveau_perf_rammap(dev, freq, ver, &hdr, &cnt, len);
 	if (rammap && strap < cnt)
 		return rammap + hdr + (strap * *len);

 	return NULL;
 }

 u8 *
 nouveau_perf_timing(struct drm_device *dev, u32 freq, u8 *ver, u8 *len)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvbios *bios = &drm->vbios;
 	struct bit_entry P;
 	u8 *perf, *timing = NULL;
 	u8 i = 0, hdr, cnt;

 	if (bios->type == NVBIOS_BMP) {
 		while ((perf = nouveau_perf_entry(dev, i++, ver, &hdr, &cnt,
 						  len)) && *ver == 0x15) {
 			if (freq <= ROM32(perf[5]) * 20) {
 				*ver = 0x00;
 				*len = 14;
 				return perf + 41;
 			}
 		}
 		return NULL;
 	}

 	if (!bit_table(dev, 'P', &P)) {
 		if (P.version == 1)
 			timing = ROMPTR(dev, P.data[4]);
 		else
 		if (P.version == 2)
 			timing = ROMPTR(dev, P.data[8]);
 	}

 	if (timing && timing[0] == 0x10) {
 		u8 *ramcfg = nouveau_perf_ramcfg(dev, freq, ver, len);
 		if (ramcfg && ramcfg[1] < timing[2]) {
 			*ver = timing[0];
 			*len = timing[3];
 			return timing + timing[1] + (ramcfg[1] * timing[3]);
 		}
 	}

 	return NULL;
 }

 static void
 legacy_perf_init(struct drm_device *dev)
 {
 	struct nouveau_device *device = nouveau_dev(dev);
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvbios *bios = &drm->vbios;
 	struct nouveau_pm *pm = nouveau_pm(dev);
 	char *perf, *entry, *bmp = &bios->data[bios->offset];
 	int headerlen, use_straps;

 	if (bmp[5] < 0x5 || bmp[6] < 0x14) {
 		NV_DEBUG(drm, "BMP version too old for perf\n");
 		return;
 	}

 	perf = ROMPTR(dev, bmp[0x73]);
 	if (!perf) {
 		NV_DEBUG(drm, "No memclock table pointer found.\n");
 		return;
 	}

 	switch (perf[0]) {
 	case 0x12:
 	case 0x14:
 	case 0x18:
 		use_straps = 0;
 		headerlen = 1;
 		break;
 	case 0x01:
 		use_straps = perf[1] & 1;
 		headerlen = (use_straps ? 8 : 2);
 		break;
 	default:
 		NV_WARN(drm, "Unknown memclock table version %x.\n", perf[0]);
 		return;
 	}

 	entry = perf + headerlen;
 	if (use_straps)
 		entry += (nv_rd32(device, NV_PEXTDEV_BOOT_0) & 0x3c) >> 1;

 	sprintf(pm->perflvl[0].name, "performance_level_0");
 	pm->perflvl[0].memory = ROM16(entry[0]) * 20;
 	pm->nr_perflvl = 1;
 }

 static void
 nouveau_perf_voltage(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct bit_entry P;
 	u8 *vmap;
 	int id;

 	id = perflvl->volt_min;
 	perflvl->volt_min = 0;

 	/* boards using voltage table version <0x40 store the voltage
 	 * level directly in the perflvl entry as a multiple of 10mV
 	 */
 	if (drm->pm->voltage.version < 0x40) {
 		perflvl->volt_min = id * 10000;
 		perflvl->volt_max = perflvl->volt_min;
 		return;
 	}

 	/* on newer ones, the perflvl stores an index into yet another
 	 * vbios table containing a min/max voltage value for the perflvl
 	 */
 	if (bit_table(dev, 'P', &P) || P.version != 2 || P.length < 34) {
 		NV_DEBUG(drm, "where's our volt map table ptr? %d %d\n",
 			 P.version, P.length);
 		return;
 	}

 	vmap = ROMPTR(dev, P.data[32]);
 	if (!vmap) {
 		NV_DEBUG(drm, "volt map table pointer invalid\n");
 		return;
 	}

 	if (id < vmap[3]) {
 		vmap += vmap[1] + (vmap[2] * id);
 		perflvl->volt_min = ROM32(vmap[0]);
 		perflvl->volt_max = ROM32(vmap[4]);
 	}
 }

 void
 nouveau_perf_init(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_pm *pm = nouveau_pm(dev);
 	struct nvbios *bios = &drm->vbios;
 	u8 *perf, ver, hdr, cnt, len;
 	int ret, vid, i = -1;

 	if (bios->type == NVBIOS_BMP && bios->data[bios->offset + 6] < 0x25) {
 		legacy_perf_init(dev);
 		return;
 	}

 	perf = nouveau_perf_table(dev, &ver);

 	while ((perf = nouveau_perf_entry(dev, ++i, &ver, &hdr, &cnt, &len))) {
 		struct nouveau_pm_level *perflvl = &pm->perflvl[pm->nr_perflvl];

 		if (perf[0] == 0xff)
 			continue;

 		switch (ver) {
 		case 0x12:
 		case 0x13:
 		case 0x15:
 			perflvl->fanspeed = perf[55];
 			if (hdr > 56)
 				perflvl->volt_min = perf[56];
 			perflvl->core = ROM32(perf[1]) * 10;
 			perflvl->memory = ROM32(perf[5]) * 20;
 			break;
 		case 0x21:
 		case 0x23:
 		case 0x24:
 			perflvl->fanspeed = perf[4];
 			perflvl->volt_min = perf[5];
 			perflvl->shader = ROM16(perf[6]) * 1000;
 			perflvl->core = perflvl->shader;
 			perflvl->core += (signed char)perf[8] * 1000;
 			if (nv_device(drm->device)->chipset == 0x49 ||
 			    nv_device(drm->device)->chipset == 0x4b)
 				perflvl->memory = ROM16(perf[11]) * 1000;
 			else
 				perflvl->memory = ROM16(perf[11]) * 2000;
 			break;
 		case 0x25:
 			perflvl->fanspeed = perf[4];
 			perflvl->volt_min = perf[5];
 			perflvl->core = ROM16(perf[6]) * 1000;
 			perflvl->shader = ROM16(perf[10]) * 1000;
 			perflvl->memory = ROM16(perf[12]) * 1000;
 			break;
 		case 0x30:
 			perflvl->memscript = ROM16(perf[2]);
 		case 0x35:
 			perflvl->fanspeed = perf[6];
 			perflvl->volt_min = perf[7];
 			perflvl->core = ROM16(perf[8]) * 1000;
 			perflvl->shader = ROM16(perf[10]) * 1000;
 			perflvl->memory = ROM16(perf[12]) * 1000;
 			perflvl->vdec = ROM16(perf[16]) * 1000;
 			perflvl->dom6 = ROM16(perf[20]) * 1000;
 			break;
 		case 0x40:
 #define subent(n) ((ROM16(perf[hdr + (n) * len]) & 0xfff) * 1000)
 			perflvl->fanspeed = 0; /*XXX*/
 			perflvl->volt_min = perf[2];
 			if (nv_device(drm->device)->card_type == NV_50) {
 				perflvl->core   = subent(0);
 				perflvl->shader = subent(1);
 				perflvl->memory = subent(2);
 				perflvl->vdec   = subent(3);
 				perflvl->unka0  = subent(4);
 			} else {
 				perflvl->hub06  = subent(0);
 				perflvl->hub01  = subent(1);
 				perflvl->copy   = subent(2);
 				perflvl->shader = subent(3);
 				perflvl->rop    = subent(4);
 				perflvl->memory = subent(5);
 				perflvl->vdec   = subent(6);
 				perflvl->daemon = subent(10);
 				perflvl->hub07  = subent(11);
 				perflvl->core   = perflvl->shader / 2;
 			}
 			break;
 		}

 		/* make sure vid is valid */
 		nouveau_perf_voltage(dev, perflvl);
 		if (pm->voltage.supported && perflvl->volt_min) {
 			vid = nouveau_volt_vid_lookup(dev, perflvl->volt_min);
 			if (vid < 0) {
 				NV_DEBUG(drm, "perflvl %d, bad vid\n", i);
 				continue;
 			}
 		}

 		/* get the corresponding memory timings */
 		ret = nouveau_mem_timing_calc(dev, perflvl->memory,
 					          &perflvl->timing);
 		if (ret) {
 			NV_DEBUG(drm, "perflvl %d, bad timing: %d\n", i, ret);
 			continue;
 		}

 		snprintf(perflvl->name, sizeof(perflvl->name),
 			 "performance_level_%d", i);
 		perflvl->id = i;

 		snprintf(perflvl->profile.name, sizeof(perflvl->profile.name),
 			 "%d", perflvl->id);
 		perflvl->profile.func = &nouveau_pm_static_profile_func;
 		list_add_tail(&perflvl->profile.head, &pm->profiles);


 		pm->nr_perflvl++;
 	}
 }

 void
 nouveau_perf_fini(struct drm_device *dev)
 {
 }
	/*
	* 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 <drm/drmP.h>

	#include "nouveau_drm.h"
	#include "nouveau_reg.h"
	#include "nouveau_pm.h"

	static u8 *
	nouveau_perf_table(struct drm_device dev, u8 ver)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nvbios *bios = &drm->vbios;
	struct bit_entry P;

	if (!bit_table(dev, 'P', &P) && P.version && P.version <= 2) {
	u8 *perf = ROMPTR(dev, P.data[0]);
	if (perf) {
	*ver = perf[0];
	return perf;
	}
	}

	if (bios->type == NVBIOS_BMP) {
	if (bios->data[bios->offset + 6] >= 0x25) {
	u8 *perf = ROMPTR(dev, bios->data[bios->offset + 0x94]);
	if (perf) {
	*ver = perf[1];
	return perf;
	}
	}
	}

	return NULL;
	}

	static u8 *
	nouveau_perf_entry(struct drm_device *dev, int idx,
	u8 ver, u8 hdr, u8 cnt, u8 len)
	{
	u8 *perf = nouveau_perf_table(dev, ver);
	if (perf) {
	if (ver >= 0x12 && ver < 0x20 && idx < perf[2]) {
	*hdr = perf[3];
	*cnt = 0;
	*len = 0;
	return perf + perf[0] + idx * perf[3];
	} else
	if (ver >= 0x20 && ver < 0x40 && idx < perf[2]) {
	*hdr = perf[3];
	*cnt = perf[4];
	*len = perf[5];
	return perf + perf[1] + idx * (hdr + (cnt * *len));
	} else
	if (ver >= 0x40 && ver < 0x41 && idx < perf[5]) {
	*hdr = perf[2];
	*cnt = perf[4];
	*len = perf[3];
	return perf + perf[1] + idx * (hdr + (cnt * *len));
	}
	}
	return NULL;
	}

	u8 *
	nouveau_perf_rammap(struct drm_device *dev, u32 freq,
	u8 ver, u8 hdr, u8 cnt, u8 len)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct bit_entry P;
	u8 *perf, i = 0;

	if (!bit_table(dev, 'P', &P) && P.version == 2) {
	u8 *rammap = ROMPTR(dev, P.data[4]);
	if (rammap) {
	u8 *ramcfg = rammap + rammap[1];

	*ver = rammap[0];
	*hdr = rammap[2];
	*cnt = rammap[4];
	*len = rammap[3];

	freq /= 1000;
	for (i = 0; i < rammap[5]; i++) {
	if (freq >= ROM16(ramcfg[0]) &&
	freq <= ROM16(ramcfg[2]))
	return ramcfg;

	ramcfg += hdr + (cnt * *len);
	}
	}

	return NULL;
	}

	if (nv_device(drm->device)->chipset == 0x49 \|\|
	nv_device(drm->device)->chipset == 0x4b)
	freq /= 2;

	while ((perf = nouveau_perf_entry(dev, i++, ver, hdr, cnt, len))) {
	if (ver >= 0x20 && ver < 0x25) {
	if (perf[0] != 0xff && freq <= ROM16(perf[11]) * 1000)
	break;
	} else
	if (ver >= 0x25 && ver < 0x40) {
	if (perf[0] != 0xff && freq <= ROM16(perf[12]) * 1000)
	break;
	}
	}

	if (perf) {
	u8 ramcfg = perf + hdr;
	*ver = 0x00;
	*hdr = 0;
	return ramcfg;
	}

	return NULL;
	}

	u8 *
	nouveau_perf_ramcfg(struct drm_device dev, u32 freq, u8 ver, u8 *len)
	{
	struct nouveau_device *device = nouveau_dev(dev);
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nvbios *bios = &drm->vbios;
	u8 strap, hdr, cnt;
	u8 *rammap;

	strap = (nv_rd32(device, 0x101000) & 0x0000003c) >> 2;
	if (bios->ram_restrict_tbl_ptr)
	strap = bios->data[bios->ram_restrict_tbl_ptr + strap];

	rammap = nouveau_perf_rammap(dev, freq, ver, &hdr, &cnt, len);
	if (rammap && strap < cnt)
	return rammap + hdr + (strap * *len);

	return NULL;
	}

	u8 *
	nouveau_perf_timing(struct drm_device dev, u32 freq, u8 ver, u8 *len)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nvbios *bios = &drm->vbios;
	struct bit_entry P;
	u8 perf, timing = NULL;
	u8 i = 0, hdr, cnt;

	if (bios->type == NVBIOS_BMP) {
	while ((perf = nouveau_perf_entry(dev, i++, ver, &hdr, &cnt,
	len)) && *ver == 0x15) {
	if (freq <= ROM32(perf[5]) * 20) {
	*ver = 0x00;
	*len = 14;
	return perf + 41;
	}
	}
	return NULL;
	}

	if (!bit_table(dev, 'P', &P)) {
	if (P.version == 1)
	timing = ROMPTR(dev, P.data[4]);
	else
	if (P.version == 2)
	timing = ROMPTR(dev, P.data[8]);
	}

	if (timing && timing[0] == 0x10) {
	u8 *ramcfg = nouveau_perf_ramcfg(dev, freq, ver, len);
	if (ramcfg && ramcfg[1] < timing[2]) {
	*ver = timing[0];
	*len = timing[3];
	return timing + timing[1] + (ramcfg[1] * timing[3]);
	}
	}

	return NULL;
	}

	static void
	legacy_perf_init(struct drm_device *dev)
	{
	struct nouveau_device *device = nouveau_dev(dev);
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nvbios *bios = &drm->vbios;
	struct nouveau_pm *pm = nouveau_pm(dev);
	char perf, entry, *bmp = &bios->data[bios->offset];
	int headerlen, use_straps;

	if (bmp[5] < 0x5 \|\| bmp[6] < 0x14) {
	NV_DEBUG(drm, "BMP version too old for perf\n");
	return;
	}

	perf = ROMPTR(dev, bmp[0x73]);
	if (!perf) {
	NV_DEBUG(drm, "No memclock table pointer found.\n");
	return;
	}

	switch (perf[0]) {
	case 0x12:
	case 0x14:
	case 0x18:
	use_straps = 0;
	headerlen = 1;
	break;
	case 0x01:
	use_straps = perf[1] & 1;
	headerlen = (use_straps ? 8 : 2);
	break;
	default:
	NV_WARN(drm, "Unknown memclock table version %x.\n", perf[0]);
	return;
	}

	entry = perf + headerlen;
	if (use_straps)
	entry += (nv_rd32(device, NV_PEXTDEV_BOOT_0) & 0x3c) >> 1;

	sprintf(pm->perflvl[0].name, "performance_level_0");
	pm->perflvl[0].memory = ROM16(entry[0]) * 20;
	pm->nr_perflvl = 1;
	}

	static void
	nouveau_perf_voltage(struct drm_device dev, struct nouveau_pm_level perflvl)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct bit_entry P;
	u8 *vmap;
	int id;

	id = perflvl->volt_min;
	perflvl->volt_min = 0;

	/* boards using voltage table version <0x40 store the voltage
	* level directly in the perflvl entry as a multiple of 10mV
	*/
	if (drm->pm->voltage.version < 0x40) {
	perflvl->volt_min = id * 10000;
	perflvl->volt_max = perflvl->volt_min;
	return;
	}

	/* on newer ones, the perflvl stores an index into yet another
	* vbios table containing a min/max voltage value for the perflvl
	*/
	if (bit_table(dev, 'P', &P) \|\| P.version != 2 \|\| P.length < 34) {
	NV_DEBUG(drm, "where's our volt map table ptr? %d %d\n",
	P.version, P.length);
	return;
	}

	vmap = ROMPTR(dev, P.data[32]);
	if (!vmap) {
	NV_DEBUG(drm, "volt map table pointer invalid\n");
	return;
	}

	if (id < vmap[3]) {
	vmap += vmap[1] + (vmap[2] * id);
	perflvl->volt_min = ROM32(vmap[0]);
	perflvl->volt_max = ROM32(vmap[4]);
	}
	}

	void
	nouveau_perf_init(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_pm *pm = nouveau_pm(dev);
	struct nvbios *bios = &drm->vbios;
	u8 *perf, ver, hdr, cnt, len;
	int ret, vid, i = -1;

	if (bios->type == NVBIOS_BMP && bios->data[bios->offset + 6] < 0x25) {
	legacy_perf_init(dev);
	return;
	}

	perf = nouveau_perf_table(dev, &ver);

	while ((perf = nouveau_perf_entry(dev, ++i, &ver, &hdr, &cnt, &len))) {
	struct nouveau_pm_level *perflvl = &pm->perflvl[pm->nr_perflvl];

	if (perf[0] == 0xff)
	continue;

	switch (ver) {
	case 0x12:
	case 0x13:
	case 0x15:
	perflvl->fanspeed = perf[55];
	if (hdr > 56)
	perflvl->volt_min = perf[56];
	perflvl->core = ROM32(perf[1]) * 10;
	perflvl->memory = ROM32(perf[5]) * 20;
	break;
	case 0x21:
	case 0x23:
	case 0x24:
	perflvl->fanspeed = perf[4];
	perflvl->volt_min = perf[5];
	perflvl->shader = ROM16(perf[6]) * 1000;
	perflvl->core = perflvl->shader;
	perflvl->core += (signed char)perf[8] * 1000;
	if (nv_device(drm->device)->chipset == 0x49 \|\|
	nv_device(drm->device)->chipset == 0x4b)
	perflvl->memory = ROM16(perf[11]) * 1000;
	else
	perflvl->memory = ROM16(perf[11]) * 2000;
	break;
	case 0x25:
	perflvl->fanspeed = perf[4];
	perflvl->volt_min = perf[5];
	perflvl->core = ROM16(perf[6]) * 1000;
	perflvl->shader = ROM16(perf[10]) * 1000;
	perflvl->memory = ROM16(perf[12]) * 1000;
	break;
	case 0x30:
	perflvl->memscript = ROM16(perf[2]);
	case 0x35:
	perflvl->fanspeed = perf[6];
	perflvl->volt_min = perf[7];
	perflvl->core = ROM16(perf[8]) * 1000;
	perflvl->shader = ROM16(perf[10]) * 1000;
	perflvl->memory = ROM16(perf[12]) * 1000;
	perflvl->vdec = ROM16(perf[16]) * 1000;
	perflvl->dom6 = ROM16(perf[20]) * 1000;
	break;
	case 0x40:
	#define subent(n) ((ROM16(perf[hdr + (n) * len]) & 0xfff) * 1000)
	perflvl->fanspeed = 0; /XXX/
	perflvl->volt_min = perf[2];
	if (nv_device(drm->device)->card_type == NV_50) {
	perflvl->core = subent(0);
	perflvl->shader = subent(1);
	perflvl->memory = subent(2);
	perflvl->vdec = subent(3);
	perflvl->unka0 = subent(4);
	} else {
	perflvl->hub06 = subent(0);
	perflvl->hub01 = subent(1);
	perflvl->copy = subent(2);
	perflvl->shader = subent(3);
	perflvl->rop = subent(4);
	perflvl->memory = subent(5);
	perflvl->vdec = subent(6);
	perflvl->daemon = subent(10);
	perflvl->hub07 = subent(11);
	perflvl->core = perflvl->shader / 2;
	}
	break;
	}

	/* make sure vid is valid */
	nouveau_perf_voltage(dev, perflvl);
	if (pm->voltage.supported && perflvl->volt_min) {
	vid = nouveau_volt_vid_lookup(dev, perflvl->volt_min);
	if (vid < 0) {
	NV_DEBUG(drm, "perflvl %d, bad vid\n", i);
	continue;
	}
	}

	/* get the corresponding memory timings */
	ret = nouveau_mem_timing_calc(dev, perflvl->memory,
	&perflvl->timing);
	if (ret) {
	NV_DEBUG(drm, "perflvl %d, bad timing: %d\n", i, ret);
	continue;
	}

	snprintf(perflvl->name, sizeof(perflvl->name),
	"performance_level_%d", i);
	perflvl->id = i;

	snprintf(perflvl->profile.name, sizeof(perflvl->profile.name),
	"%d", perflvl->id);
	perflvl->profile.func = &nouveau_pm_static_profile_func;
	list_add_tail(&perflvl->profile.head, &pm->profiles);


	pm->nr_perflvl++;
	}
	}

	void
	nouveau_perf_fini(struct drm_device *dev)
	{
	}