gpu: nvgpu: Implement gp10b intr processing

Bug 1567274

Change-Id: I2a6cef954b56d1f97208d29584e0748ec1c5e29d
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/591628
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit

drivers/gpu/nvgpu/gp10b/Makefile

@@ -10,4 +10,5 @@ ccflags-$(CONFIG_GK20A) += -Wno-multichar
 
 obj-$(CONFIG_GK20A)  += \
 	gr_gp10b.o  \
+	mc_gp10b.o  \
 	hal_gp10b.o

drivers/gpu/nvgpu/gp10b/hal_gp10b.c

@@ -21,6 +21,7 @@
 #include "gk20a/gk20a.h"
 
 #include "gp10b/gr_gp10b.h"
+#include "gp10b/mc_gp10b.h"
 
 #include "gm20b/ltc_gm20b.h"
 #include "gm20b/fb_gm20b.h"
@@ -83,6 +84,7 @@ struct gpu_ops gp10b_ops = {
 int gp10b_init_hal(struct gpu_ops *gops)
 {
 	*gops = gp10b_ops;
+	gp10b_init_mc(gops);
 	gm20b_init_ltc(gops);
 	gp10b_init_gr(gops);
 	gm20b_init_ltc(gops);

drivers/gpu/nvgpu/gp10b/hw_mc_gp10b.h

@@ -78,6 +78,10 @@ static inline u32 mc_intr_pfifo_pending_f(void)
 {
 	return 0x100;
 }
+static inline u32 mc_intr_pgraph_pending_f(void)
+{
+	return 0x1000;
+}
 static inline u32 mc_intr_pmu_pending_f(void)
 {
 	return 0x1000000;

drivers/gpu/nvgpu/gp10b/mc_gp10b.c

@@ -0,0 +1,135 @@
+/*
+ * GP20B master
+ *
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/types.h>
+
+#include "gk20a/gk20a.h"
+#include "mc_gp10b.h"
+#include "hw_mc_gp10b.h"
+
+void mc_gp10b_intr_enable(struct gk20a *g)
+{
+	if (!tegra_platform_is_linsim()) {
+		gk20a_writel(g, mc_intr_en_clear_r(0), 0xffffffff);
+		gk20a_writel(g, mc_intr_en_set_r(0),
+			     mc_intr_pfifo_pending_f()
+			     | mc_intr_pgraph_pending_f());
+		gk20a_writel(g, mc_intr_en_clear_r(1), 0xffffffff);
+		gk20a_writel(g, mc_intr_en_set_r(1),
+			     mc_intr_pfifo_pending_f()
+			     | mc_intr_pgraph_pending_f()
+			     | mc_intr_priv_ring_pending_f()
+			     | mc_intr_ltc_pending_f()
+			     | mc_intr_pbus_pending_f());
+	}
+}
+
+irqreturn_t mc_gp10b_isr_stall(struct gk20a *g)
+{
+	u32 mc_intr_0;
+
+	if (!g->power_on)
+		return IRQ_NONE;
+
+	/* not from gpu when sharing irq with others */
+	mc_intr_0 = gk20a_readl(g, mc_intr_r(0));
+	if (unlikely(!mc_intr_0))
+		return IRQ_NONE;
+
+	gk20a_writel(g, mc_intr_en_clear_r(0), 0xffffffff);
+
+	return IRQ_WAKE_THREAD;
+}
+
+irqreturn_t mc_gp10b_isr_nonstall(struct gk20a *g)
+{
+	u32 mc_intr_1;
+
+	if (!g->power_on)
+		return IRQ_NONE;
+
+	/* not from gpu when sharing irq with others */
+	mc_intr_1 = gk20a_readl(g, mc_intr_r(1));
+	if (unlikely(!mc_intr_1))
+		return IRQ_NONE;
+
+	gk20a_writel(g, mc_intr_en_clear_r(1), 0xffffffff);
+
+	return IRQ_WAKE_THREAD;
+}
+
+irqreturn_t mc_gp10b_intr_thread_stall(struct gk20a *g)
+{
+	u32 mc_intr_0;
+
+	gk20a_dbg(gpu_dbg_intr, "interrupt thread launched");
+
+	mc_intr_0 = gk20a_readl(g, mc_intr_r(0));
+
+	gk20a_dbg(gpu_dbg_intr, "stall intr %08x\n", mc_intr_0);
+
+	if (mc_intr_0 & mc_intr_pgraph_pending_f())
+		gr_gk20a_elpg_protected_call(g, gk20a_gr_isr(g));
+	if (mc_intr_0 & mc_intr_pfifo_pending_f())
+		gk20a_fifo_isr(g);
+	if (mc_intr_0 & mc_intr_pmu_pending_f())
+		gk20a_pmu_isr(g);
+	if (mc_intr_0 & mc_intr_priv_ring_pending_f())
+		gk20a_priv_ring_isr(g);
+	if (mc_intr_0 & mc_intr_ltc_pending_f())
+		g->ops.ltc.isr(g);
+	if (mc_intr_0 & mc_intr_pbus_pending_f())
+		gk20a_pbus_isr(g);
+
+	gk20a_writel(g, mc_intr_en_set_r(0),
+		     mc_intr_pfifo_pending_f()
+		     | mc_intr_pgraph_pending_f());
+
+	return IRQ_HANDLED;
+}
+
+irqreturn_t mc_gp10b_intr_thread_nonstall(struct gk20a *g)
+{
+	u32 mc_intr_1;
+
+	gk20a_dbg(gpu_dbg_intr, "interrupt thread launched");
+
+	mc_intr_1 = gk20a_readl(g, mc_intr_r(1));
+
+	gk20a_dbg(gpu_dbg_intr, "non-stall intr %08x\n", mc_intr_1);
+
+	if (mc_intr_1 & mc_intr_pfifo_pending_f())
+		gk20a_fifo_nonstall_isr(g);
+	if (mc_intr_1 & mc_intr_pgraph_pending_f())
+		gk20a_gr_nonstall_isr(g);
+
+	gk20a_writel(g, mc_intr_en_set_r(1),
+		     mc_intr_pfifo_pending_f()
+		     | mc_intr_pgraph_pending_f()
+		     | mc_intr_priv_ring_pending_f()
+		     | mc_intr_ltc_pending_f()
+		     | mc_intr_pbus_pending_f());
+
+	return IRQ_HANDLED;
+}
+
+void gp10b_init_mc(struct gpu_ops *gops)
+{
+	gops->mc.intr_enable = mc_gp10b_intr_enable;
+	gops->mc.isr_stall = mc_gp10b_isr_stall;
+	gops->mc.isr_nonstall = mc_gp10b_isr_nonstall;
+	gops->mc.isr_thread_stall = mc_gp10b_intr_thread_stall;
+	gops->mc.isr_thread_nonstall = mc_gp10b_intr_thread_nonstall;
+}

drivers/gpu/nvgpu/gp10b/mc_gp10b.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef MC_GP20B_H
+#define MC_GP20B_H
+struct gk20a;
+
+void gp10b_init_mc(struct gpu_ops *gops);
+void mc_gp10b_intr_enable(struct gk20a *g);
+irqreturn_t mc_gp10b_isr_stall(struct gk20a *g);
+irqreturn_t mc_gp10b_isr_nonstall(struct gk20a *g);
+irqreturn_t mc_gp10b_intr_thread_stall(struct gk20a *g);
+irqreturn_t mc_gp10b_intr_thread_nonstall(struct gk20a *g);
+#endif