[PATCH RFC 16/24] drm/lima: add DLBU related functions

[Qiang Yu <yuq825@gmail.com>]

DLBU is used to balance load among PPs.

Signed-off-by: Qiang Yu <yuq825@gmail.com>
---
 drivers/gpu/drm/lima/lima_dlbu.c | 75 ++++++++++++++++++++++++++++++++
 drivers/gpu/drm/lima/lima_dlbu.h | 37 ++++++++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 drivers/gpu/drm/lima/lima_dlbu.c
 create mode 100644 drivers/gpu/drm/lima/lima_dlbu.h

diff --git a/drivers/gpu/drm/lima/lima_dlbu.c b/drivers/gpu/drm/lima/lima_dlbu.c
new file mode 100644
index 000000000000..5281dd3c0417
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_dlbu.c
@@ -0,0 +1,75 @@
+/*
+ * 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_dlbu.h"
+#include "lima_vm.h"
+#include "lima_regs.h"
+
+#define dlbu_write(reg, data) writel(data, ip->iomem + LIMA_DLBU_##reg)
+#define dlbu_read(reg) readl(ip->iomem + LIMA_DLBU_##reg)
+
+void lima_dlbu_enable(struct lima_device *dev)
+{
+	struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
+	struct lima_ip *ip = dev->ip + lima_ip_dlbu;
+	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);
+	}
+
+	dlbu_write(PP_ENABLE_MASK, mask);
+}
+
+void lima_dlbu_disable(struct lima_device *dev)
+{
+	struct lima_ip *ip = dev->ip + lima_ip_dlbu;
+	dlbu_write(PP_ENABLE_MASK, 0);
+}
+
+void lima_dlbu_set_reg(struct lima_ip *ip, u32 *reg)
+{
+	dlbu_write(TLLIST_VBASEADDR, reg[0]);
+	dlbu_write(FB_DIM, reg[1]);
+	dlbu_write(TLLIST_CONF, reg[2]);
+	dlbu_write(START_TILE_POS, reg[3]);
+}
+
+int lima_dlbu_init(struct lima_ip *ip)
+{
+	struct lima_device *dev = ip->dev;
+
+	dlbu_write(MASTER_TLLIST_PHYS_ADDR, dev->dlbu_dma | 1);
+	dlbu_write(MASTER_TLLIST_VADDR, LIMA_VA_RESERVE_DLBU);
+
+	return 0;
+}
+
+void lima_dlbu_fini(struct lima_ip *ip)
+{
+	
+}
diff --git a/drivers/gpu/drm/lima/lima_dlbu.h b/drivers/gpu/drm/lima/lima_dlbu.h
new file mode 100644
index 000000000000..4521a5dda9e0
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_dlbu.h
@@ -0,0 +1,37 @@
+/*
+ * 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_DLBU_H__
+#define __LIMA_DLBU_H__
+
+struct lima_ip;
+struct lima_device;
+
+void lima_dlbu_enable(struct lima_device *dev);
+void lima_dlbu_disable(struct lima_device *dev);
+
+void lima_dlbu_set_reg(struct lima_ip *ip, u32 *reg);
+
+int lima_dlbu_init(struct lima_ip *ip);
+void lima_dlbu_fini(struct lima_ip *ip);
+
+#endif
-- 
2.17.0

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