cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp100.c

/*
 * Copyright 2013 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 "ram.h"

#include <subdev/bios.h>
#include <subdev/bios/init.h>
#include <subdev/bios/rammap.h>


static int gp100_ram_init(struct nvkm_ram *ram) { struct nvkm_subdev *subdev = &ram->fb->subdev; struct nvkm_device *device = subdev->device; struct nvkm_bios *bios = device->bios; u8 ver, hdr, cnt, len, snr, ssz; u32 data; int i; /* run a bunch of tables from rammap table. there's actually * individual pointers for each rammap entry too, but, nvidia * seem to just run the last two entries' scripts early on in * their init, and never again.. we'll just run 'em all once * for now. * * i strongly suspect that each script is for a separate mode * (likely selected by 0x9a065c's lower bits?), and the * binary driver skips the one that's already been setup by * the init tables. */ data = nvbios_rammapTe(bios, &ver, &hdr, &cnt, &len, &snr, &ssz); if (!data || hdr < 0x15) return -EINVAL; cnt = nvbios_rd08(bios, data + 0x14); /* guess at count */ data = nvbios_rd32(bios, data + 0x10); /* guess u32... */ if (cnt) { u32 save = nvkm_rd32(device, 0x9a065c) & 0x000000f0; for (i = 0; i < cnt; i++, data += 4) { if (i != save >> 4) { nvkm_mask(device, 0x9a065c, 0x000000f0, i << 4); nvbios_exec(&(struct nvbios_init) { .subdev = subdev, .bios = bios, .offset = nvbios_rd32(bios, data), .execute = 1, }); } } nvkm_mask(device, 0x9a065c, 0x000000f0, save); } nvkm_mask(device, 0x9a0584, 0x11000000, 0x00000000); nvkm_wr32(device, 0x10ecc0, 0xffffffff); nvkm_mask(device, 0x9a0160, 0x00000010, 0x00000010); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs263100.00%1100.00%
Total263100.00%1100.00%

static const struct nvkm_ram_func gp100_ram_func = { .init = gp100_ram_init, .get = gf100_ram_get, .put = gf100_ram_put, };
int gp100_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram) { struct nvkm_ram *ram; struct nvkm_subdev *subdev = &fb->subdev; struct nvkm_device *device = subdev->device; enum nvkm_ram_type type = nvkm_fb_bios_memtype(device->bios); const u32 rsvd_head = ( 256 * 1024); /* vga memory */ const u32 rsvd_tail = (1024 * 1024); /* vbios etc */ u32 fbpa_num = nvkm_rd32(device, 0x02243c), fbpa; u32 fbio_opt = nvkm_rd32(device, 0x021c14); u64 part, size = 0, comm = ~0ULL; bool mixed = false; int ret; nvkm_debug(subdev, "02243c: %08x\n", fbpa_num); nvkm_debug(subdev, "021c14: %08x\n", fbio_opt); for (fbpa = 0; fbpa < fbpa_num; fbpa++) { if (!(fbio_opt & (1 << fbpa))) { part = nvkm_rd32(device, 0x90020c + (fbpa * 0x4000)); nvkm_debug(subdev, "fbpa %02x: %lld MiB\n", fbpa, part); part = part << 20; if (part != comm) { if (comm != ~0ULL) mixed = true; comm = min(comm, part); } size = size + part; } } ret = nvkm_ram_new_(&gp100_ram_func, fb, type, size, 0, &ram); *pram = ram; if (ret) return ret; nvkm_mm_fini(&ram->vram); if (mixed) { ret = nvkm_mm_init(&ram->vram, rsvd_head >> NVKM_RAM_MM_SHIFT, ((comm * fbpa_num) - rsvd_head) >> NVKM_RAM_MM_SHIFT, 1); if (ret) return ret; ret = nvkm_mm_init(&ram->vram, (0x1000000000ULL + comm) >> NVKM_RAM_MM_SHIFT, (size - (comm * fbpa_num) - rsvd_tail) >> NVKM_RAM_MM_SHIFT, 1); if (ret) return ret; } else { ret = nvkm_mm_init(&ram->vram, rsvd_head >> NVKM_RAM_MM_SHIFT, (size - rsvd_head - rsvd_tail) >> NVKM_RAM_MM_SHIFT, 1); if (ret) return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs389100.00%2100.00%
Total389100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs688100.00%2100.00%
Total688100.00%2100.00%
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