diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/engine/fifo/base.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/engine/fifo/base.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/base.c b/drivers/gpu/drm/nouveau/core/engine/fifo/base.c new file mode 100644 index 00000000000..bbb43c67c2a --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/engine/fifo/base.c @@ -0,0 +1,181 @@ +/* + * 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 + */ + +#include <core/object.h> +#include <core/handle.h> + +#include <engine/dmaobj.h> +#include <engine/fifo.h> + +int +nouveau_fifo_channel_create_(struct nouveau_object *parent, + struct nouveau_object *engine, + struct nouveau_oclass *oclass, + int bar, u32 addr, u32 size, u32 pushbuf, + u32 engmask, int len, void **ptr) +{ + struct nouveau_device *device = nv_device(engine); + struct nouveau_fifo *priv = (void *)engine; + struct nouveau_fifo_chan *chan; + struct nouveau_dmaeng *dmaeng; + unsigned long flags; + int ret; + + /* create base object class */ + ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL, + engmask, len, ptr); + chan = *ptr; + if (ret) + return ret; + + /* validate dma object representing push buffer */ + chan->pushdma = (void *)nouveau_handle_ref(parent, pushbuf); + if (!chan->pushdma) + return -ENOENT; + + dmaeng = (void *)chan->pushdma->base.engine; + switch (chan->pushdma->base.oclass->handle) { + case 0x0002: + case 0x003d: + break; + default: + return -EINVAL; + } + + if (dmaeng->bind) { + ret = dmaeng->bind(dmaeng, parent, chan->pushdma, &chan->pushgpu); + if (ret) + return ret; + } + + /* find a free fifo channel */ + spin_lock_irqsave(&priv->lock, flags); + for (chan->chid = priv->min; chan->chid < priv->max; chan->chid++) { + if (!priv->channel[chan->chid]) { + priv->channel[chan->chid] = nv_object(chan); + break; + } + } + spin_unlock_irqrestore(&priv->lock, flags); + + if (chan->chid == priv->max) { + nv_error(priv, "no free channels\n"); + return -ENOSPC; + } + + /* map fifo control registers */ + chan->user = ioremap(pci_resource_start(device->pdev, bar) + addr + + (chan->chid * size), size); + if (!chan->user) + return -EFAULT; + + chan->size = size; + return 0; +} + +void +nouveau_fifo_channel_destroy(struct nouveau_fifo_chan *chan) +{ + struct nouveau_fifo *priv = (void *)nv_object(chan)->engine; + unsigned long flags; + + iounmap(chan->user); + + spin_lock_irqsave(&priv->lock, flags); + priv->channel[chan->chid] = NULL; + spin_unlock_irqrestore(&priv->lock, flags); + + nouveau_gpuobj_ref(NULL, &chan->pushgpu); + nouveau_object_ref(NULL, (struct nouveau_object **)&chan->pushdma); + nouveau_namedb_destroy(&chan->base); +} + +void +_nouveau_fifo_channel_dtor(struct nouveau_object *object) +{ + struct nouveau_fifo_chan *chan = (void *)object; + nouveau_fifo_channel_destroy(chan); +} + +u32 +_nouveau_fifo_channel_rd32(struct nouveau_object *object, u32 addr) +{ + struct nouveau_fifo_chan *chan = (void *)object; + return ioread32_native(chan->user + addr); +} + +void +_nouveau_fifo_channel_wr32(struct nouveau_object *object, u32 addr, u32 data) +{ + struct nouveau_fifo_chan *chan = (void *)object; + iowrite32_native(data, chan->user + addr); +} + +static int +nouveau_fifo_chid(struct nouveau_fifo *priv, struct nouveau_object *object) +{ + int engidx = nv_hclass(priv) & 0xff; + + while (object && object->parent) { + if ( nv_iclass(object->parent, NV_ENGCTX_CLASS) && + (nv_hclass(object->parent) & 0xff) == engidx) + return nouveau_fifo_chan(object)->chid; + object = object->parent; + } + + return -1; +} + +void +nouveau_fifo_destroy(struct nouveau_fifo *priv) +{ + kfree(priv->channel); + nouveau_engine_destroy(&priv->base); +} + +int +nouveau_fifo_create_(struct nouveau_object *parent, + struct nouveau_object *engine, + struct nouveau_oclass *oclass, + int min, int max, int length, void **pobject) +{ + struct nouveau_fifo *priv; + int ret; + + ret = nouveau_engine_create_(parent, engine, oclass, true, "PFIFO", + "fifo", length, pobject); + priv = *pobject; + if (ret) + return ret; + + priv->min = min; + priv->max = max; + priv->channel = kzalloc(sizeof(*priv->channel) * (max + 1), GFP_KERNEL); + if (!priv->channel) + return -ENOMEM; + + priv->chid = nouveau_fifo_chid; + spin_lock_init(&priv->lock); + return 0; +} |