drm/nouveau/fifo: split user classes out from engine implementations

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 162 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c
new file mode 100644
index 000000000000..cc401ae1d6a5
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c
@@ -0,0 +1,162 @@
+/*
+ * 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 "chan.h"
+
+#include <core/client.h>
+#include <engine/dma.h>
+
+#include <nvif/class.h>
+
+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;
+}
+
+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);
+}
+
+void
+nvkm_fifo_channel_destroy(struct nvkm_fifo_chan *chan)
+{
+	struct nvkm_fifo *fifo = (void *)nv_object(chan)->engine;
+	unsigned long flags;
+
+	if (chan->user)
+		iounmap(chan->user);
+
+	spin_lock_irqsave(&fifo->lock, flags);
+	fifo->channel[chan->chid] = NULL;
+	spin_unlock_irqrestore(&fifo->lock, flags);
+
+	nvkm_gpuobj_del(&chan->pushgpu);
+	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_create_(struct nvkm_object *parent,
+			  struct nvkm_object *engine,
+			  struct nvkm_oclass *oclass,
+			  int bar, u32 addr, u32 size, u64 pushbuf,
+			  u64 engmask, int len, void **ptr)
+{
+	struct nvkm_client *client = nvkm_client(parent);
+	struct nvkm_fifo *fifo = (void *)engine;
+	struct nvkm_fifo_base *base = (void *)parent;
+	struct nvkm_fifo_chan *chan;
+	struct nvkm_subdev *subdev = &fifo->engine.subdev;
+	struct nvkm_device *device = subdev->device;
+	struct nvkm_dmaobj *dmaobj;
+	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 */
+	if (pushbuf) {
+		dmaobj = nvkm_dma_search(device->dma, client, pushbuf);
+		if (!dmaobj)
+			return -ENOENT;
+
+		ret = nvkm_object_bind(&dmaobj->object, &base->gpuobj, 16,
+				       &chan->pushgpu);
+		if (ret)
+			return ret;
+	}
+
+	/* find a free fifo channel */
+	spin_lock_irqsave(&fifo->lock, flags);
+	for (chan->chid = fifo->min; chan->chid < fifo->max; chan->chid++) {
+		if (!fifo->channel[chan->chid]) {
+			fifo->channel[chan->chid] = nv_object(chan);
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&fifo->lock, flags);
+
+	if (chan->chid == fifo->max) {
+		nvkm_error(subdev, "no free channels\n");
+		return -ENOSPC;
+	}
+
+	chan->addr = nv_device_resource_start(device, bar) +
+		     addr + size * chan->chid;
+	chan->size = size;
+	nvkm_event_send(&fifo->cevent, 1, 0, NULL, 0);
+	return 0;
+}