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      1 /*	$NetBSD: nouveau_nvkm_subdev_bios_pmu.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 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 <bskeggs (at) redhat.com>
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_pmu.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/image.h>
     32 #include <subdev/bios/pmu.h>
     33 
     34 u32
     35 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     36 {
     37 	struct bit_entry bit_p;
     38 	u32 data = 0;
     39 
     40 	if (!bit_entry(bios, 'p', &bit_p)) {
     41 		if (bit_p.version == 2 && bit_p.length >= 4)
     42 			data = nvbios_rd32(bios, bit_p.offset + 0x00);
     43 		if (data) {
     44 			*ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
     45 			*hdr = nvbios_rd08(bios, data + 0x01);
     46 			*len = nvbios_rd08(bios, data + 0x02);
     47 			*cnt = nvbios_rd08(bios, data + 0x03);
     48 		}
     49 	}
     50 
     51 	return data;
     52 }
     53 
     54 u32
     55 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
     56 {
     57 	u8  cnt, len;
     58 	u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
     59 	if (data && idx < cnt) {
     60 		data = data + *hdr + (idx * len);
     61 		*hdr = len;
     62 		return data;
     63 	}
     64 	return 0;
     65 }
     66 
     67 u32
     68 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
     69 	     struct nvbios_pmuE *info)
     70 {
     71 	u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
     72 	memset(info, 0x00, sizeof(*info));
     73 	switch (!!data * *ver) {
     74 	default:
     75 		info->type = nvbios_rd08(bios, data + 0x00);
     76 		info->data = nvbios_rd32(bios, data + 0x02);
     77 		break;
     78 	}
     79 	return data;
     80 }
     81 
     82 bool
     83 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
     84 {
     85 	struct nvbios_pmuE pmuE;
     86 	u8  ver, hdr, idx = 0;
     87 	u32 data;
     88 	memset(info, 0x00, sizeof(*info));
     89 	while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
     90 		if (pmuE.type == type && (data = pmuE.data)) {
     91 			info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
     92 			info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
     93 			info->boot_addr     = data + 0x30;
     94 			info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
     95 					      nvbios_rd32(bios, data + 0x18);
     96 			info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
     97 					      nvbios_rd32(bios, data + 0x18);
     98 			info->code_addr     = info->boot_addr + info->boot_size;
     99 			info->code_addr_pmu = info->boot_addr_pmu +
    100 					      info->boot_size;
    101 			info->code_size     = nvbios_rd32(bios, data + 0x20);
    102 			info->data_addr     = data + 0x30 +
    103 					      nvbios_rd32(bios, data + 0x24);
    104 			info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
    105 			info->data_size     = nvbios_rd32(bios, data + 0x2c);
    106 			return true;
    107 		}
    108 	}
    109 	return false;
    110 }
    111