cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

lut.c (2377B)

      1/*
      2 * Copyright 2018 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#include "lut.h"
     23#include "disp.h"
     24
     25#include <drm/drm_color_mgmt.h>
     26#include <drm/drm_mode.h>
     27#include <drm/drm_property.h>
     28
     29#include <nvif/class.h>
     30
     31u32
     32nv50_lut_load(struct nv50_lut *lut, int buffer, struct drm_property_blob *blob,
     33	      void (*load)(struct drm_color_lut *, int, void __iomem *))
     34{
     35	struct drm_color_lut *in = blob ? blob->data : NULL;
     36	void __iomem *mem = lut->mem[buffer].object.map.ptr;
     37	const u32 addr = lut->mem[buffer].addr;
     38	int i;
     39
     40	if (!in) {
     41		in = kvmalloc_array(1024, sizeof(*in), GFP_KERNEL);
     42		if (!WARN_ON(!in)) {
     43			for (i = 0; i < 1024; i++) {
     44				in[i].red   =
     45				in[i].green =
     46				in[i].blue  = (i << 16) >> 10;
     47			}
     48			load(in, 1024, mem);
     49			kvfree(in);
     50		}
     51	} else {
     52		load(in, drm_color_lut_size(blob), mem);
     53	}
     54
     55	return addr;
     56}
     57
     58void
     59nv50_lut_fini(struct nv50_lut *lut)
     60{
     61	int i;
     62	for (i = 0; i < ARRAY_SIZE(lut->mem); i++)
     63		nvif_mem_dtor(&lut->mem[i]);
     64}
     65
     66int
     67nv50_lut_init(struct nv50_disp *disp, struct nvif_mmu *mmu,
     68	      struct nv50_lut *lut)
     69{
     70	const u32 size = disp->disp->object.oclass < GF110_DISP ? 257 : 1025;
     71	int i;
     72	for (i = 0; i < ARRAY_SIZE(lut->mem); i++) {
     73		int ret = nvif_mem_ctor_map(mmu, "kmsLut", NVIF_MEM_VRAM,
     74					    size * 8, &lut->mem[i]);
     75		if (ret)
     76			return ret;
     77	}
     78	return 0;
     79}