--- /dev/null
+/*
+ * 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 <engine/fifo.h>
+
+#include <core/client.h>
+#include <core/device.h>
+#include <core/handle.h>
+#include <core/notify.h>
+#include <engine/dmaobj.h>
+
+#include <nvif/class.h>
+#include <nvif/event.h>
+#include <nvif/unpack.h>
+
+static int
+nvkm_fifo_event_ctor(struct nvkm_object *object, void *data, u32 size,
+ struct nvkm_notify *notify)
+{
+ if (size == 0) {
+ notify->size = 0;
+ notify->types = 1;
+ notify->index = 0;
+ return 0;
+ }
+ return -ENOSYS;
+}
+
+static const struct nvkm_event_func
+nvkm_fifo_event_func = {
+ .ctor = nvkm_fifo_event_ctor,
+};
+
+int
+nvkm_fifo_channel_create_(struct nvkm_object *parent,
+ struct nvkm_object *engine,
+ struct nvkm_oclass *oclass,
+ int bar, u32 addr, u32 size, u32 pushbuf,
+ u64 engmask, int len, void **ptr)
+{
+ struct nvkm_device *device = nv_device(engine);
+ struct nvkm_fifo *priv = (void *)engine;
+ struct nvkm_fifo_chan *chan;
+ struct nvkm_dmaeng *dmaeng;
+ unsigned long flags;
+ int ret;
+
+ /* create base object class */
+ ret = nvkm_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 *)nvkm_handle_ref(parent, pushbuf);
+ if (!chan->pushdma)
+ return -ENOENT;
+
+ dmaeng = (void *)chan->pushdma->base.engine;
+ switch (chan->pushdma->base.oclass->handle) {
+ case NV_DMA_FROM_MEMORY:
+ case NV_DMA_IN_MEMORY:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = dmaeng->bind(chan->pushdma, parent, &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;
+ }
+
+ chan->addr = nv_device_resource_start(device, bar) +
+ addr + size * chan->chid;
+ chan->size = size;
+ nvkm_event_send(&priv->cevent, 1, 0, NULL, 0);
+ return 0;
+}
+
+void
+nvkm_fifo_channel_destroy(struct nvkm_fifo_chan *chan)
+{
+ struct nvkm_fifo *priv = (void *)nv_object(chan)->engine;
+ unsigned long flags;
+
+ if (chan->user)
+ iounmap(chan->user);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->channel[chan->chid] = NULL;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ nvkm_gpuobj_ref(NULL, &chan->pushgpu);
+ nvkm_object_ref(NULL, (struct nvkm_object **)&chan->pushdma);
+ nvkm_namedb_destroy(&chan->namedb);
+}
+
+void
+_nvkm_fifo_channel_dtor(struct nvkm_object *object)
+{
+ struct nvkm_fifo_chan *chan = (void *)object;
+ nvkm_fifo_channel_destroy(chan);
+}
+
+int
+_nvkm_fifo_channel_map(struct nvkm_object *object, u64 *addr, u32 *size)
+{
+ struct nvkm_fifo_chan *chan = (void *)object;
+ *addr = chan->addr;
+ *size = chan->size;
+ return 0;
+}
+
+u32
+_nvkm_fifo_channel_rd32(struct nvkm_object *object, u64 addr)
+{
+ struct nvkm_fifo_chan *chan = (void *)object;
+ if (unlikely(!chan->user)) {
+ chan->user = ioremap(chan->addr, chan->size);
+ if (WARN_ON_ONCE(chan->user == NULL))
+ return 0;
+ }
+ return ioread32_native(chan->user + addr);
+}
+
+void
+_nvkm_fifo_channel_wr32(struct nvkm_object *object, u64 addr, u32 data)
+{
+ struct nvkm_fifo_chan *chan = (void *)object;
+ if (unlikely(!chan->user)) {
+ chan->user = ioremap(chan->addr, chan->size);
+ if (WARN_ON_ONCE(chan->user == NULL))
+ return;
+ }
+ iowrite32_native(data, chan->user + addr);
+}
+
+int
+nvkm_fifo_uevent_ctor(struct nvkm_object *object, void *data, u32 size,
+ struct nvkm_notify *notify)
+{
+ union {
+ struct nvif_notify_uevent_req none;
+ } *req = data;
+ int ret;
+
+ if (nvif_unvers(req->none)) {
+ notify->size = sizeof(struct nvif_notify_uevent_rep);
+ notify->types = 1;
+ notify->index = 0;
+ }
+
+ return ret;
+}
+
+void
+nvkm_fifo_uevent(struct nvkm_fifo *fifo)
+{
+ struct nvif_notify_uevent_rep rep = {
+ };
+ nvkm_event_send(&fifo->uevent, 1, 0, &rep, sizeof(rep));
+}
+
+int
+_nvkm_fifo_channel_ntfy(struct nvkm_object *object, u32 type,
+ struct nvkm_event **event)
+{
+ struct nvkm_fifo *fifo = (void *)object->engine;
+ switch (type) {
+ case G82_CHANNEL_DMA_V0_NTFY_UEVENT:
+ if (nv_mclass(object) >= G82_CHANNEL_DMA) {
+ *event = &fifo->uevent;
+ return 0;
+ }
+ break;
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+static int
+nvkm_fifo_chid(struct nvkm_fifo *priv, struct nvkm_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 nvkm_fifo_chan(object)->chid;
+ object = object->parent;
+ }
+
+ return -1;
+}
+
+const char *
+nvkm_client_name_for_fifo_chid(struct nvkm_fifo *fifo, u32 chid)
+{
+ struct nvkm_fifo_chan *chan = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fifo->lock, flags);
+ if (chid >= fifo->min && chid <= fifo->max)
+ chan = (void *)fifo->channel[chid];
+ spin_unlock_irqrestore(&fifo->lock, flags);
+
+ return nvkm_client_name(chan);
+}
+
+void
+nvkm_fifo_destroy(struct nvkm_fifo *priv)
+{
+ kfree(priv->channel);
+ nvkm_event_fini(&priv->uevent);
+ nvkm_event_fini(&priv->cevent);
+ nvkm_engine_destroy(&priv->base);
+}
+
+int
+nvkm_fifo_create_(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass,
+ int min, int max, int length, void **pobject)
+{
+ struct nvkm_fifo *priv;
+ int ret;
+
+ ret = nvkm_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;
+
+ ret = nvkm_event_init(&nvkm_fifo_event_func, 1, 1, &priv->cevent);
+ if (ret)
+ return ret;
+
+ priv->chid = nvkm_fifo_chid;
+ spin_lock_init(&priv->lock);
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff