cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0203.c

/*
 * Copyright 2014 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 <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/M0203.h>


u32 nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) { struct bit_entry bit_M; u32 data = 0x00000000; if (!bit_entry(bios, 'M', &bit_M)) { if (bit_M.version == 2 && bit_M.length > 0x04) data = nvbios_rd16(bios, bit_M.offset + 0x03); if (data) { *ver = nvbios_rd08(bios, data + 0x00); switch (*ver) { case 0x10: *hdr = nvbios_rd08(bios, data + 0x01); *len = nvbios_rd08(bios, data + 0x02); *cnt = nvbios_rd08(bios, data + 0x03); return data; default: break; } } } return 0x00000000; }

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PersonTokensPropCommitsCommitProp
Ben Skeggs149100.00%3100.00%
Total149100.00%3100.00%


u32 nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0203T *info) { u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len); memset(info, 0x00, sizeof(*info)); switch (!!data * *ver) { case 0x10: info->type = nvbios_rd08(bios, data + 0x04); info->pointer = nvbios_rd16(bios, data + 0x05); break; default: break; } return data; }

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PersonTokensPropCommitsCommitProp
Ben Skeggs106100.00%3100.00%
Total106100.00%3100.00%


u32 nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) { u8 cnt, len; u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len); if (data && idx < cnt) { data = data + *hdr + idx * len; *hdr = len; return data; } return 0x00000000; }

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PersonTokensPropCommitsCommitProp
Ben Skeggs76100.00%2100.00%
Total76100.00%2100.00%


u32 nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, struct nvbios_M0203E *info) { u32 data = nvbios_M0203Ee(bios, idx, ver, hdr); memset(info, 0x00, sizeof(*info)); switch (!!data * *ver) { case 0x10: info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0; info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4; info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0; return data; default: break; } return 0x00000000; }

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Ben Skeggs132100.00%3100.00%
Total132100.00%3100.00%


u32 nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr, struct nvbios_M0203E *info) { struct nvkm_subdev *subdev = &bios->subdev; struct nvbios_M0203T M0203T; u8 cnt, len, idx = 0xff; u32 data; if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) { nvkm_warn(subdev, "M0203T not found\n"); return 0x00000000; } while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) { switch (M0203T.type) { case M0203T_TYPE_RAMCFG: if (info->strap != ramcfg) continue; return data; default: nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type); return 0x00000000; } } return data; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs148100.00%3100.00%
Total148100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs621100.00%4100.00%
Total621100.00%4100.00%
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