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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crcc57d.c (1653B)

      1// SPDX-License-Identifier: MIT
      2
      3#include "crc.h"
      4#include "crcc37d.h"
      5#include "core.h"
      6#include "disp.h"
      7#include "head.h"
      8
      9#include <nvif/pushc37b.h>
     10
     11#include <nvhw/class/clc57d.h>
     12
     13static int crcc57d_set_src(struct nv50_head *head, int or, enum nv50_crc_source_type source,
     14			   struct nv50_crc_notifier_ctx *ctx)
     15{
     16	struct nvif_push *push = nv50_disp(head->base.base.dev)->core->chan.push;
     17	const int i = head->base.index;
     18	u32 crc_args = NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, CONTROLLING_CHANNEL, CORE) |
     19		       NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, EXPECT_BUFFER_COLLAPSE, FALSE) |
     20		       NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, SECONDARY_CRC, NONE) |
     21		       NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, CRC_DURING_SNOOZE, DISABLE);
     22	int ret;
     23
     24	switch (source) {
     25	case NV50_CRC_SOURCE_TYPE_SOR:
     26		crc_args |= NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, PRIMARY_CRC, SOR(or));
     27		break;
     28	case NV50_CRC_SOURCE_TYPE_SF:
     29		crc_args |= NVDEF(NVC57D, HEAD_SET_CRC_CONTROL, PRIMARY_CRC, SF);
     30		break;
     31	default:
     32		break;
     33	}
     34
     35	ret = PUSH_WAIT(push, 4);
     36	if (ret)
     37		return ret;
     38
     39	if (source) {
     40		PUSH_MTHD(push, NVC57D, HEAD_SET_CONTEXT_DMA_CRC(i), ctx->ntfy.handle);
     41		PUSH_MTHD(push, NVC57D, HEAD_SET_CRC_CONTROL(i), crc_args);
     42	} else {
     43		PUSH_MTHD(push, NVC57D, HEAD_SET_CRC_CONTROL(i), 0);
     44		PUSH_MTHD(push, NVC57D, HEAD_SET_CONTEXT_DMA_CRC(i), 0);
     45	}
     46
     47	return 0;
     48}
     49
     50const struct nv50_crc_func crcc57d = {
     51	.set_src = crcc57d_set_src,
     52	.set_ctx = crcc37d_set_ctx,
     53	.get_entry = crcc37d_get_entry,
     54	.ctx_finished = crcc37d_ctx_finished,
     55	.flip_threshold = CRCC37D_FLIP_THRESHOLD,
     56	.num_entries = CRCC37D_MAX_ENTRIES,
     57	.notifier_len = sizeof(struct crcc37d_notifier),
     58};