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      1 /*	$NetBSD: nouveau_nvkm_subdev_bios_boost.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2013 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_boost.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
     28 
     29 #include <subdev/bios.h>
     30 #include <subdev/bios/bit.h>
     31 #include <subdev/bios/boost.h>
     32 
     33 u32
     34 nvbios_boostTe(struct nvkm_bios *bios,
     35 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
     36 {
     37 	struct bit_entry bit_P;
     38 	u32 boost = 0;
     39 
     40 	if (!bit_entry(bios, 'P', &bit_P)) {
     41 		if (bit_P.version == 2 && bit_P.length >= 0x34)
     42 			boost = nvbios_rd32(bios, bit_P.offset + 0x30);
     43 
     44 		if (boost) {
     45 			*ver = nvbios_rd08(bios, boost + 0);
     46 			switch (*ver) {
     47 			case 0x11:
     48 				*hdr = nvbios_rd08(bios, boost + 1);
     49 				*cnt = nvbios_rd08(bios, boost + 5);
     50 				*len = nvbios_rd08(bios, boost + 2);
     51 				*snr = nvbios_rd08(bios, boost + 4);
     52 				*ssz = nvbios_rd08(bios, boost + 3);
     53 				return boost;
     54 			default:
     55 				break;
     56 			}
     57 		}
     58 	}
     59 
     60 	return 0;
     61 }
     62 
     63 u32
     64 nvbios_boostEe(struct nvkm_bios *bios, int idx,
     65 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     66 {
     67 	u8  snr, ssz;
     68 	u32 data = nvbios_boostTe(bios, ver, hdr, cnt, len, &snr, &ssz);
     69 	if (data && idx < *cnt) {
     70 		data = data + *hdr + (idx * (*len + (snr * ssz)));
     71 		*hdr = *len;
     72 		*cnt = snr;
     73 		*len = ssz;
     74 		return data;
     75 	}
     76 	return 0;
     77 }
     78 
     79 u32
     80 nvbios_boostEp(struct nvkm_bios *bios, int idx,
     81 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_boostE *info)
     82 {
     83 	u32 data = nvbios_boostEe(bios, idx, ver, hdr, cnt, len);
     84 	memset(info, 0x00, sizeof(*info));
     85 	if (data) {
     86 		info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5;
     87 		info->min    =  nvbios_rd16(bios, data + 0x02) * 1000;
     88 		info->max    =  nvbios_rd16(bios, data + 0x04) * 1000;
     89 	}
     90 	return data;
     91 }
     92 
     93 u32
     94 nvbios_boostEm(struct nvkm_bios *bios, u8 pstate,
     95 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_boostE *info)
     96 {
     97 	u32 data, idx = 0;
     98 	while ((data = nvbios_boostEp(bios, idx++, ver, hdr, cnt, len, info))) {
     99 		if (info->pstate == pstate)
    100 			break;
    101 	}
    102 	return data;
    103 }
    104 
    105 u32
    106 nvbios_boostSe(struct nvkm_bios *bios, int idx,
    107 	       u32 data, u8 *ver, u8 *hdr, u8 cnt, u8 len)
    108 {
    109 	if (data && idx < cnt) {
    110 		data = data + *hdr + (idx * len);
    111 		*hdr = len;
    112 		return data;
    113 	}
    114 	return 0;
    115 }
    116 
    117 u32
    118 nvbios_boostSp(struct nvkm_bios *bios, int idx,
    119 	       u32 data, u8 *ver, u8 *hdr, u8 cnt, u8 len,
    120 	       struct nvbios_boostS *info)
    121 {
    122 	data = nvbios_boostSe(bios, idx, data, ver, hdr, cnt, len);
    123 	memset(info, 0x00, sizeof(*info));
    124 	if (data) {
    125 		info->domain  = nvbios_rd08(bios, data + 0x00);
    126 		info->percent = nvbios_rd08(bios, data + 0x01);
    127 		info->min     = nvbios_rd16(bios, data + 0x02) * 1000;
    128 		info->max     = nvbios_rd16(bios, data + 0x04) * 1000;
    129 	}
    130 	return data;
    131 }
    132