cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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gf100.c (4066B)

      1/*
      2 * Copyright 2012 Red Hat Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: Ben Skeggs
     23 */
     24#include "gf100.h"
     25#include "ram.h"
     26
     27#include <core/memory.h>
     28#include <core/option.h>
     29#include <subdev/therm.h>
     30
     31void
     32gf100_fb_intr(struct nvkm_fb *base)
     33{
     34	struct gf100_fb *fb = gf100_fb(base);
     35	struct nvkm_subdev *subdev = &fb->base.subdev;
     36	struct nvkm_device *device = subdev->device;
     37	u32 intr = nvkm_rd32(device, 0x000100);
     38	if (intr & 0x08000000)
     39		nvkm_debug(subdev, "PFFB intr\n");
     40	if (intr & 0x00002000)
     41		nvkm_debug(subdev, "PBFB intr\n");
     42}
     43
     44int
     45gf100_fb_oneinit(struct nvkm_fb *base)
     46{
     47	struct gf100_fb *fb = gf100_fb(base);
     48	struct nvkm_device *device = fb->base.subdev.device;
     49	int ret, size = 1 << (fb->base.page ? fb->base.page : 17);
     50
     51	size = nvkm_longopt(device->cfgopt, "MmuDebugBufferSize", size);
     52	size = max(size, 0x1000);
     53
     54	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
     55			      true, &fb->base.mmu_rd);
     56	if (ret)
     57		return ret;
     58
     59	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
     60			      true, &fb->base.mmu_wr);
     61	if (ret)
     62		return ret;
     63
     64	fb->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
     65	if (fb->r100c10_page) {
     66		fb->r100c10 = dma_map_page(device->dev, fb->r100c10_page, 0,
     67					   PAGE_SIZE, DMA_BIDIRECTIONAL);
     68		if (dma_mapping_error(device->dev, fb->r100c10))
     69			return -EFAULT;
     70	}
     71
     72	return 0;
     73}
     74
     75int
     76gf100_fb_init_page(struct nvkm_fb *fb)
     77{
     78	struct nvkm_device *device = fb->subdev.device;
     79	switch (fb->page) {
     80	case 16: nvkm_mask(device, 0x100c80, 0x00000001, 0x00000001); break;
     81	case 17: nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000); break;
     82	default:
     83		return -EINVAL;
     84	}
     85	return 0;
     86}
     87
     88void
     89gf100_fb_init(struct nvkm_fb *base)
     90{
     91	struct gf100_fb *fb = gf100_fb(base);
     92	struct nvkm_device *device = fb->base.subdev.device;
     93
     94	if (fb->r100c10_page)
     95		nvkm_wr32(device, 0x100c10, fb->r100c10 >> 8);
     96
     97	if (base->func->clkgate_pack) {
     98		nvkm_therm_clkgate_init(device->therm,
     99					base->func->clkgate_pack);
    100	}
    101}
    102
    103void *
    104gf100_fb_dtor(struct nvkm_fb *base)
    105{
    106	struct gf100_fb *fb = gf100_fb(base);
    107	struct nvkm_device *device = fb->base.subdev.device;
    108
    109	if (fb->r100c10_page) {
    110		dma_unmap_page(device->dev, fb->r100c10, PAGE_SIZE,
    111			       DMA_BIDIRECTIONAL);
    112		__free_page(fb->r100c10_page);
    113	}
    114
    115	return fb;
    116}
    117
    118int
    119gf100_fb_new_(const struct nvkm_fb_func *func, struct nvkm_device *device,
    120	      enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
    121{
    122	struct gf100_fb *fb;
    123
    124	if (!(fb = kzalloc(sizeof(*fb), GFP_KERNEL)))
    125		return -ENOMEM;
    126	nvkm_fb_ctor(func, device, type, inst, &fb->base);
    127	*pfb = &fb->base;
    128
    129	return 0;
    130}
    131
    132static const struct nvkm_fb_func
    133gf100_fb = {
    134	.dtor = gf100_fb_dtor,
    135	.oneinit = gf100_fb_oneinit,
    136	.init = gf100_fb_init,
    137	.init_page = gf100_fb_init_page,
    138	.intr = gf100_fb_intr,
    139	.ram_new = gf100_ram_new,
    140	.default_bigpage = 17,
    141};
    142
    143int
    144gf100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
    145{
    146	return gf100_fb_new_(&gf100_fb, device, type, inst, pfb);
    147}