1 files changed, 282 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
new file mode 100644
index 000000000000..fa223f88d25e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
@@ -0,0 +1,282 @@
+/*
+ * 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;
+}