nv50_fence.c

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/*
 * Copyright 2012 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 <[email protected]>
 */

#include <core/object.h>
#include <core/class.h>

#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_fence.h"

#include "nv50_display.h"

struct nv50_fence_chan {
    struct nouveau_fence_chan base;
};

struct nv50_fence_priv {
    struct nouveau_fence_priv base;
    struct nouveau_bo *bo;
    spinlock_t lock;
    u32 sequence;
};

static int
nv50_fence_context_new(struct nouveau_channel *chan)
{
    struct drm_device *dev = chan->drm->dev;
    struct nv50_fence_priv *priv = chan->drm->fence;
    struct nv50_fence_chan *fctx;
    struct ttm_mem_reg *mem = &priv->bo->bo.mem;
    struct nouveau_object *object;
    int ret, i;

    fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
    if (!fctx)
        return -ENOMEM;

    nouveau_fence_context_new(&fctx->base);

    ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
                 NvSema, 0x0002,
                 &(struct nv_dma_class) {
                    .flags = NV_DMA_TARGET_VRAM |
                         NV_DMA_ACCESS_RDWR,
                    .start = mem->start * PAGE_SIZE,
                    .limit = mem->size - 1,
                 }, sizeof(struct nv_dma_class),
                 &object);

    /* dma objects for display sync channel semaphore blocks */
    for (i = 0; !ret && i < dev->mode_config.num_crtc; i++) {
        struct nouveau_bo *bo = nv50_display_crtc_sema(dev, i);

        ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
                     NvEvoSema0 + i, 0x003d,
                     &(struct nv_dma_class) {
                        .flags = NV_DMA_TARGET_VRAM |
                             NV_DMA_ACCESS_RDWR,
                        .start = bo->bo.offset,
                        .limit = bo->bo.offset + 0xfff,
                     }, sizeof(struct nv_dma_class),
                     &object);
    }

    if (ret)
        nv10_fence_context_del(chan);
    return ret;
}

int
nv50_fence_create(struct nouveau_drm *drm)
{
    struct nv50_fence_priv *priv;
    int ret = 0;

    priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
    if (!priv)
        return -ENOMEM;

    priv->base.dtor = nv10_fence_destroy;
    priv->base.context_new = nv50_fence_context_new;
    priv->base.context_del = nv10_fence_context_del;
    priv->base.emit = nv10_fence_emit;
    priv->base.read = nv10_fence_read;
    priv->base.sync = nv17_fence_sync;
    spin_lock_init(&priv->lock);

    ret = nouveau_bo_new(drm->dev, 4096, 0x1000, TTM_PL_FLAG_VRAM,
                 0, 0x0000, NULL, &priv->bo);
    if (!ret) {
        ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
        if (!ret)
            ret = nouveau_bo_map(priv->bo);
        if (ret)
            nouveau_bo_ref(NULL, &priv->bo);
    }

    if (ret == 0) {
        nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
        priv->base.sync = nv17_fence_sync;
    }

    if (ret)
        nv10_fence_destroy(drm);
    return ret;
}