[PATCH RFC 15/24] drm/lima: add BCAST related function

[Qiang Yu <yuq825@gmail.com>]

BCAST is a hardware module to broadcast register
read/write for PPs. It can also merge IRQs from
different PPs into one IRQ.

Signed-off-by: Qiang Yu <yuq825@gmail.com>
---
 drivers/gpu/drm/lima/lima_bcast.c | 65 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/lima/lima_bcast.h | 34 ++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 drivers/gpu/drm/lima/lima_bcast.c
 create mode 100644 drivers/gpu/drm/lima/lima_bcast.h

diff --git a/drivers/gpu/drm/lima/lima_bcast.c b/drivers/gpu/drm/lima/lima_bcast.c
new file mode 100644
index 000000000000..32012a61ea6a
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_bcast.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2017-2018 Lima Project
+ *
+ * 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.
+ */
+
+#include <linux/io.h>
+#include <linux/device.h>
+
+#include "lima_device.h"
+#include "lima_bcast.h"
+#include "lima_regs.h"
+
+#define bcast_write(reg, data) writel(data, ip->iomem + LIMA_BCAST_##reg)
+#define bcast_read(reg) readl(ip->iomem + LIMA_BCAST_##reg)
+
+void lima_bcast_enable(struct lima_device *dev)
+{
+	struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
+	struct lima_ip *ip = dev->ip + lima_ip_bcast;
+	int i, mask = 0;
+
+	for (i = 0; i < pipe->num_processor; i++) {
+		struct lima_ip *pp = pipe->processor[i];
+		mask |= 1 << (pp->id - lima_ip_pp0);
+	}
+
+	bcast_write(BROADCAST_MASK, (mask << 16) | mask);
+	bcast_write(INTERRUPT_MASK, mask);
+}
+
+void lima_bcast_disable(struct lima_device *dev)
+{
+	struct lima_ip *ip = dev->ip + lima_ip_bcast;
+
+	bcast_write(BROADCAST_MASK, 0);
+	bcast_write(INTERRUPT_MASK, 0);
+}
+
+int lima_bcast_init(struct lima_ip *ip)
+{
+	return 0;
+}
+
+void lima_bcast_fini(struct lima_ip *ip)
+{
+	
+}
+
diff --git a/drivers/gpu/drm/lima/lima_bcast.h b/drivers/gpu/drm/lima/lima_bcast.h
new file mode 100644
index 000000000000..abafd4f613c7
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_bcast.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2017-2018 Lima Project
+ *
+ * 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.
+ */
+
+#ifndef __LIMA_BCAST_H__
+#define __LIMA_BCAST_H__
+
+struct lima_ip;
+
+int lima_bcast_init(struct lima_ip *ip);
+void lima_bcast_fini(struct lima_ip *ip);
+
+void lima_bcast_enable(struct lima_device *dev);
+void lima_bcast_disable(struct lima_device *dev);
+
+#endif
-- 
2.17.0

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