Quelle  gv100_fence.c   Sprache: C

/* SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
 */
#include "nouveau_drv.h"
#include "nouveau_dma.h"
#include "nouveau_fence.h"

#include "nv50_display.h"

#include <nvif/push906f.h>

#include <nvhw/class/clc36f.h>

static int
gv100_fence_emit32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
{
 struct nvif_push *push = &chan->chan.push;
 int ret;

 ret = PUSH_WAIT(push, 13);
 if (ret)
  return ret;

 PUSH_MTHD(push, NVC36F, SEM_ADDR_LO, lower_32_bits(virtual),
    SEM_ADDR_HI, upper_32_bits(virtual),
    SEM_PAYLOAD_LO, sequence);

 PUSH_MTHD(push, NVC36F, SEM_EXECUTE,
    NVDEF(NVC36F, SEM_EXECUTE, OPERATION, RELEASE) |
    NVDEF(NVC36F, SEM_EXECUTE, RELEASE_WFI, EN) |
    NVDEF(NVC36F, SEM_EXECUTE, PAYLOAD_SIZE, 32BIT) |
    NVDEF(NVC36F, SEM_EXECUTE, RELEASE_TIMESTAMP, DIS));

 PUSH_MTHD(push, NVC36F, MEM_OP_A, 0,
    MEM_OP_B, 0,
    MEM_OP_C, NVDEF(NVC36F, MEM_OP_C, MEMBAR_TYPE, SYS_MEMBAR),
    MEM_OP_D, NVDEF(NVC36F, MEM_OP_D, OPERATION, MEMBAR));

 PUSH_MTHD(push, NVC36F, NON_STALL_INTERRUPT, 0);

 PUSH_KICK(push);
 return 0;
}

static int
gv100_fence_sync32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
{
 struct nvif_push *push = &chan->chan.push;
 int ret;

 ret = PUSH_WAIT(push, 6);
 if (ret)
  return ret;

 PUSH_MTHD(push, NVC36F, SEM_ADDR_LO, lower_32_bits(virtual),
    SEM_ADDR_HI, upper_32_bits(virtual),
    SEM_PAYLOAD_LO, sequence);

 PUSH_MTHD(push, NVC36F, SEM_EXECUTE,
    NVDEF(NVC36F, SEM_EXECUTE, OPERATION, ACQ_CIRC_GEQ) |
    NVDEF(NVC36F, SEM_EXECUTE, ACQUIRE_SWITCH_TSG, EN) |
    NVDEF(NVC36F, SEM_EXECUTE, PAYLOAD_SIZE, 32BIT));

 PUSH_KICK(push);
 return 0;
}

static int
gv100_fence_context_new(struct nouveau_channel *chan)
{
 struct nv84_fence_chan *fctx;
 int ret;

 ret = nv84_fence_context_new(chan);
 if (ret)
  return ret;

 fctx = chan->fence;
 fctx->base.emit32 = gv100_fence_emit32;
 fctx->base.sync32 = gv100_fence_sync32;
 return 0;
}

int
gv100_fence_create(struct nouveau_drm *drm)
{
 struct nv84_fence_priv *priv;
 int ret;

 ret = nv84_fence_create(drm);
 if (ret)
  return ret;

 priv = drm->fence;
 priv->base.context_new = gv100_fence_context_new;
 return 0;
}