drm/nv84: add support for the PCRYPT engine

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

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv84_crypt.c b/drivers/gpu/drm/nouveau/nv84_crypt.c
new file mode 100644
index 000000000000..63bd6bb41e38
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv84_crypt.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2010 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 "drmP.h"
+#include "nouveau_drv.h"
+
+int
+nv84_crypt_create_context(struct nouveau_channel *chan)
+{
+	struct drm_device *dev = chan->dev;
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_gpuobj *ramin = chan->ramin;
+	int ret;
+
+	NV_DEBUG(dev, "ch%d\n", chan->id);
+
+	ret = nouveau_gpuobj_new(dev, chan, 256, 0x1000,
+				 NVOBJ_FLAG_ZERO_ALLOC | NVOBJ_FLAG_ZERO_FREE,
+				 &chan->crypt_ctx);
+	if (ret)
+		return ret;
+
+	nv_wo32(ramin, 0xa0, 0x00190000);
+	nv_wo32(ramin, 0xa4, chan->crypt_ctx->vinst + 0xff);
+	nv_wo32(ramin, 0xa8, chan->crypt_ctx->vinst);
+	nv_wo32(ramin, 0xac, 0);
+	nv_wo32(ramin, 0xb0, 0);
+	nv_wo32(ramin, 0xb4, 0);
+
+	dev_priv->engine.instmem.flush(dev);
+	return 0;
+}
+
+void
+nv84_crypt_destroy_context(struct nouveau_channel *chan)
+{
+	struct drm_device *dev = chan->dev;
+	u32 inst;
+
+	if (!chan->ramin)
+		return;
+
+	inst  = (chan->ramin->vinst >> 12);
+	inst |= 0x80000000;
+
+	/* mark context as invalid if still on the hardware, not
+	 * doing this causes issues the next time PCRYPT is used,
+	 * unsurprisingly :)
+	 */
+	nv_wr32(dev, 0x10200c, 0x00000000);
+	if (nv_rd32(dev, 0x102188) == inst)
+		nv_mask(dev, 0x102188, 0x80000000, 0x00000000);
+	if (nv_rd32(dev, 0x10218c) == inst)
+		nv_mask(dev, 0x10218c, 0x80000000, 0x00000000);
+	nv_wr32(dev, 0x10200c, 0x00000010);
+
+	nouveau_gpuobj_ref(NULL, &chan->crypt_ctx);
+}
+
+void
+nv84_crypt_tlb_flush(struct drm_device *dev)
+{
+	nv50_vm_flush(dev, 0x0a);
+}
+
+int
+nv84_crypt_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_crypt_engine *pcrypt = &dev_priv->engine.crypt;
+
+	if (!pcrypt->registered) {
+		NVOBJ_CLASS(dev, 0x74c1, CRYPT);
+		pcrypt->registered = true;
+	}
+
+	nv_mask(dev, 0x000200, 0x00004000, 0x00000000);
+	nv_mask(dev, 0x000200, 0x00004000, 0x00004000);
+	nv_wr32(dev, 0x102130, 0xffffffff);
+	nv_wr32(dev, 0x102140, 0xffffffbf);
+	nv_wr32(dev, 0x10200c, 0x00000010);
+	return 0;
+}
+
+void
+nv84_crypt_fini(struct drm_device *dev)
+{
+	nv_wr32(dev, 0x102140, 0x00000000);
+}