nouveau_abi16.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.
 *
 */

#include <core/object.h>
#include <core/client.h>
#include <core/device.h>
#include <core/class.h>
#include <core/mm.h>

#include <subdev/fb.h>
#include <subdev/timer.h>
#include <subdev/instmem.h>

#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_gem.h"
#include "nouveau_chan.h"
#include "nouveau_abi16.h"

struct nouveau_abi16 *
nouveau_abi16_get(struct drm_file *file_priv, struct drm_device *dev)
{
    struct nouveau_cli *cli = nouveau_cli(file_priv);
    mutex_lock(&cli->mutex);
    if (!cli->abi16) {
        struct nouveau_abi16 *abi16;
        cli->abi16 = abi16 = kzalloc(sizeof(*abi16), GFP_KERNEL);
        if (cli->abi16) {
            INIT_LIST_HEAD(&abi16->channels);
            abi16->client = nv_object(cli);

            /* allocate device object targeting client's default
             * device (ie. the one that belongs to the fd it
             * opened)
             */
            if (nouveau_object_new(abi16->client, NVDRM_CLIENT,
                           NVDRM_DEVICE, 0x0080,
                           &(struct nv_device_class) {
                        .device = ~0ULL,
                           },
                           sizeof(struct nv_device_class),
                           &abi16->device) == 0)
                return cli->abi16;

            kfree(cli->abi16);
            cli->abi16 = NULL;
        }

        mutex_unlock(&cli->mutex);
    }
    return cli->abi16;
}

int
nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
{
    struct nouveau_cli *cli = (void *)abi16->client;
    mutex_unlock(&cli->mutex);
    return ret;
}

u16
nouveau_abi16_swclass(struct nouveau_drm *drm)
{
    switch (nv_device(drm->device)->card_type) {
    case NV_04:
        return 0x006e;
    case NV_10:
    case NV_20:
    case NV_30:
    case NV_40:
        return 0x016e;
    case NV_50:
        return 0x506e;
    case NV_C0:
    case NV_D0:
    case NV_E0:
        return 0x906e;
    }

    return 0x0000;
}

static void
nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
            struct nouveau_abi16_ntfy *ntfy)
{
    nouveau_mm_free(&chan->heap, &ntfy->node);
    list_del(&ntfy->head);
    kfree(ntfy);
}

static void
nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
            struct nouveau_abi16_chan *chan)
{
    struct nouveau_abi16_ntfy *ntfy, *temp;

    /* cleanup notifier state */
    list_for_each_entry_safe(ntfy, temp, &chan->notifiers, head) {
        nouveau_abi16_ntfy_fini(chan, ntfy);
    }

    if (chan->ntfy) {
        nouveau_bo_vma_del(chan->ntfy, &chan->ntfy_vma);
        drm_gem_object_unreference_unlocked(chan->ntfy->gem);
    }

    if (chan->heap.block_size)
        nouveau_mm_fini(&chan->heap);

    /* destroy channel object, all children will be killed too */
    if (chan->chan) {
        abi16->handles &= ~(1 << (chan->chan->handle & 0xffff));
        nouveau_channel_del(&chan->chan);
    }

    list_del(&chan->head);
    kfree(chan);
}

void
nouveau_abi16_fini(struct nouveau_abi16 *abi16)
{
    struct nouveau_cli *cli = (void *)abi16->client;
    struct nouveau_abi16_chan *chan, *temp;

    /* cleanup channels */
    list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
        nouveau_abi16_chan_fini(abi16, chan);
    }

    /* destroy the device object */
    nouveau_object_del(abi16->client, NVDRM_CLIENT, NVDRM_DEVICE);

    kfree(cli->abi16);
    cli->abi16 = NULL;
}

int
nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
{
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_device *device = nv_device(drm->device);
    struct nouveau_timer *ptimer = nouveau_timer(device);
    struct drm_nouveau_getparam *getparam = data;

    switch (getparam->param) {
    case NOUVEAU_GETPARAM_CHIPSET_ID:
        getparam->value = device->chipset;
        break;
    case NOUVEAU_GETPARAM_PCI_VENDOR:
        getparam->value = dev->pci_vendor;
        break;
    case NOUVEAU_GETPARAM_PCI_DEVICE:
        getparam->value = dev->pci_device;
        break;
    case NOUVEAU_GETPARAM_BUS_TYPE:
        if (drm_pci_device_is_agp(dev))
            getparam->value = 0;
        else
        if (!pci_is_pcie(dev->pdev))
            getparam->value = 1;
        else
            getparam->value = 2;
        break;
    case NOUVEAU_GETPARAM_FB_SIZE:
        getparam->value = drm->gem.vram_available;
        break;
    case NOUVEAU_GETPARAM_AGP_SIZE:
        getparam->value = drm->gem.gart_available;
        break;
    case NOUVEAU_GETPARAM_VM_VRAM_BASE:
        getparam->value = 0; /* deprecated */
        break;
    case NOUVEAU_GETPARAM_PTIMER_TIME:
        getparam->value = ptimer->read(ptimer);
        break;
    case NOUVEAU_GETPARAM_HAS_BO_USAGE:
        getparam->value = 1;
        break;
    case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
        getparam->value = 1;
        break;
    case NOUVEAU_GETPARAM_GRAPH_UNITS:
        /* NV40 and NV50 versions are quite different, but register
         * address is the same. User is supposed to know the card
         * family anyway... */
        if (device->chipset >= 0x40) {
            getparam->value = nv_rd32(device, 0x001540);
            break;
        }
        /* FALLTHRU */
    default:
        nv_debug(device, "unknown parameter %lld\n", getparam->param);
        return -EINVAL;
    }

    return 0;
}

int
nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)
{
    return -EINVAL;
}

int
nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
{
    struct drm_nouveau_channel_alloc *init = data;
    struct nouveau_cli *cli = nouveau_cli(file_priv);
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
    struct nouveau_abi16_chan *chan;
    struct nouveau_client *client;
    struct nouveau_device *device;
    struct nouveau_instmem *imem;
    struct nouveau_fb *pfb;
    int ret;

    if (unlikely(!abi16))
        return -ENOMEM;

    if (!drm->channel)
        return nouveau_abi16_put(abi16, -ENODEV);

    client = nv_client(abi16->client);

    if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
        return nouveau_abi16_put(abi16, -EINVAL);

    device = nv_device(abi16->device);
    imem   = nouveau_instmem(device);
    pfb    = nouveau_fb(device);

    /* allocate "abi16 channel" data and make up a handle for it */
    init->channel = ffsll(~abi16->handles);
    if (!init->channel--)
        return nouveau_abi16_put(abi16, -ENOSPC);

    chan = kzalloc(sizeof(*chan), GFP_KERNEL);
    if (!chan)
        return nouveau_abi16_put(abi16, -ENOMEM);

    INIT_LIST_HEAD(&chan->notifiers);
    list_add(&chan->head, &abi16->channels);
    abi16->handles |= (1 << init->channel);

    /* create channel object and initialise dma and fence management */
    if (device->card_type >= NV_E0) {
        init->fb_ctxdma_handle = NVE0_CHANNEL_IND_ENGINE_GR;
        init->tt_ctxdma_handle = 0;
    }

    ret = nouveau_channel_new(drm, cli, NVDRM_DEVICE, NVDRM_CHAN |
                  init->channel, init->fb_ctxdma_handle,
                  init->tt_ctxdma_handle, &chan->chan);
    if (ret)
        goto done;

    if (device->card_type >= NV_50)
        init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
                    NOUVEAU_GEM_DOMAIN_GART;
    else
    if (chan->chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM)
        init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
    else
        init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;

    if (device->card_type < NV_C0) {
        init->subchan[0].handle = 0x00000000;
        init->subchan[0].grclass = 0x0000;
        init->subchan[1].handle = NvSw;
        init->subchan[1].grclass = 0x506e;
        init->nr_subchan = 2;
    }

    /* Named memory object area */
    ret = nouveau_gem_new(dev, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
                  0, 0, &chan->ntfy);
    if (ret == 0)
        ret = nouveau_bo_pin(chan->ntfy, TTM_PL_FLAG_TT);
    if (ret)
        goto done;

    if (device->card_type >= NV_50) {
        ret = nouveau_bo_vma_add(chan->ntfy, client->vm,
                    &chan->ntfy_vma);
        if (ret)
            goto done;
    }

    ret = drm_gem_handle_create(file_priv, chan->ntfy->gem,
                    &init->notifier_handle);
    if (ret)
        goto done;

    ret = nouveau_mm_init(&chan->heap, 0, PAGE_SIZE, 1);
done:
    if (ret)
        nouveau_abi16_chan_fini(abi16, chan);
    return nouveau_abi16_put(abi16, ret);
}


int
nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
{
    struct drm_nouveau_channel_free *req = data;
    struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
    struct nouveau_abi16_chan *chan;
    int ret = -ENOENT;

    if (unlikely(!abi16))
        return -ENOMEM;

    list_for_each_entry(chan, &abi16->channels, head) {
        if (chan->chan->handle == (NVDRM_CHAN | req->channel)) {
            nouveau_abi16_chan_fini(abi16, chan);
            return nouveau_abi16_put(abi16, 0);
        }
    }

    return nouveau_abi16_put(abi16, ret);
}

int
nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
{
    struct drm_nouveau_grobj_alloc *init = data;
    struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_object *object;
    int ret;

    if (unlikely(!abi16))
        return -ENOMEM;

    if (init->handle == ~0)
        return nouveau_abi16_put(abi16, -EINVAL);

    /* compatibility with userspace that assumes 506e for all chipsets */
    if (init->class == 0x506e) {
        init->class = nouveau_abi16_swclass(drm);
        if (init->class == 0x906e)
            return nouveau_abi16_put(abi16, 0);
    }

    ret = nouveau_object_new(abi16->client, NVDRM_CHAN | init->channel,
                  init->handle, init->class, NULL, 0, &object);
    return nouveau_abi16_put(abi16, ret);
}

int
nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
{
    struct drm_nouveau_notifierobj_alloc *info = data;
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_device *device = nv_device(drm->device);
    struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
    struct nouveau_abi16_chan *chan, *temp;
    struct nouveau_abi16_ntfy *ntfy;
    struct nouveau_object *object;
    struct nv_dma_class args;
    int ret;

    if (unlikely(!abi16))
        return -ENOMEM;

    /* completely unnecessary for these chipsets... */
    if (unlikely(nv_device(abi16->device)->card_type >= NV_C0))
        return nouveau_abi16_put(abi16, -EINVAL);

    list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
        if (chan->chan->handle == (NVDRM_CHAN | info->channel))
            break;
        chan = NULL;
    }

    if (!chan)
        return nouveau_abi16_put(abi16, -ENOENT);

    ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
    if (!ntfy)
        return nouveau_abi16_put(abi16, -ENOMEM);

    list_add(&ntfy->head, &chan->notifiers);
    ntfy->handle = info->handle;

    ret = nouveau_mm_head(&chan->heap, 1, info->size, info->size, 1,
                  &ntfy->node);
    if (ret)
        goto done;

    args.start = ntfy->node->offset;
    args.limit = ntfy->node->offset + ntfy->node->length - 1;
    if (device->card_type >= NV_50) {
        args.flags  = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
        args.start += chan->ntfy_vma.offset;
        args.limit += chan->ntfy_vma.offset;
    } else
    if (drm->agp.stat == ENABLED) {
        args.flags  = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
        args.start += drm->agp.base + chan->ntfy->bo.offset;
        args.limit += drm->agp.base + chan->ntfy->bo.offset;
    } else {
        args.flags  = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
        args.start += chan->ntfy->bo.offset;
        args.limit += chan->ntfy->bo.offset;
    }

    ret = nouveau_object_new(abi16->client, chan->chan->handle,
                 ntfy->handle, 0x003d, &args,
                 sizeof(args), &object);
    if (ret)
        goto done;

done:
    if (ret)
        nouveau_abi16_ntfy_fini(chan, ntfy);
    return nouveau_abi16_put(abi16, ret);
}

int
nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
{
    struct drm_nouveau_gpuobj_free *fini = data;
    struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
    struct nouveau_abi16_chan *chan, *temp;
    struct nouveau_abi16_ntfy *ntfy;
    int ret;

    if (unlikely(!abi16))
        return -ENOMEM;

    list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
        if (chan->chan->handle == (NVDRM_CHAN | fini->channel))
            break;
        chan = NULL;
    }

    if (!chan)
        return nouveau_abi16_put(abi16, -ENOENT);

    /* synchronize with the user channel and destroy the gpu object */
    nouveau_channel_idle(chan->chan);

    ret = nouveau_object_del(abi16->client, chan->chan->handle, fini->handle);
    if (ret)
        return nouveau_abi16_put(abi16, ret);

    /* cleanup extra state if this object was a notifier */
    list_for_each_entry(ntfy, &chan->notifiers, head) {
        if (ntfy->handle == fini->handle) {
            nouveau_mm_free(&chan->heap, &ntfy->node);
            list_del(&ntfy->head);
            break;
        }
    }

    return nouveau_abi16_put(abi16, 0);
}