linux-kernel - [PATCH v8 1/7] powerpc/powernv: Data structure and macros definition

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Date:	Tue, 23 Feb 2016 09:16:32 +0530
From:	Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Anton Blanchard <anton@...ba.org>,
	Daniel Axtens <dja@...ens.net>,
	Stephane Eranian <eranian@...gle.com>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Subject: [PATCH v8 1/7] powerpc/powernv: Data structure and macros definition

Create new header file "nest-pmu.h" to add the data structures
and macros needed for the nest pmu support.

Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Anton Blanchard <anton@...ba.org>
Cc: Daniel Axtens <dja@...ens.net>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
---
 arch/powerpc/include/asm/nest-pmu.h | 55 +++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 arch/powerpc/include/asm/nest-pmu.h

diff --git a/arch/powerpc/include/asm/nest-pmu.h b/arch/powerpc/include/asm/nest-pmu.h
new file mode 100644
index 000000000000..13c21817e3cc
--- /dev/null
+++ b/arch/powerpc/include/asm/nest-pmu.h
@@ -0,0 +1,55 @@
+/*
+ * Nest Performance Monitor counter support.
+ *
+ * Copyright (C) 2016 Madhavan Srinivasan, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/perf_event.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/io.h>
+#include <asm/opal.h>
+
+#define NEST_MAX_CHIPS			32
+#define NEST_MAX_PMUS			32
+#define NEST_MAX_PMU_NAME_LEN		256
+#define NEST_MAX_EVENTS_SUPPORTED	64
+#define NEST_ENGINE_START		1
+#define NEST_ENGINE_STOP		0
+#define NEST_MODE_PRODUCTION		1
+#define NEST_MAX_PAGES			16
+
+/*
+ * Structure to hold per chip specific memory address
+ * information for nest pmus. Nest Counter data are exported
+ * in per-chip reserved memory region by the PORE Engine.
+ */
+struct perchip_nest_info {
+	u32 chip_id;
+	u64 pbase;
+	u64 vbase[NEST_MAX_PAGES];
+	u32 size;
+};
+
+/*
+ * Place holder for nest pmu events and values.
+ */
+struct nest_ima_events {
+	char *ev_name;
+	char *ev_value;
+};
+
+/*
+ * Device tree parser code detects nest pmu support and
+ * registers new nest pmus. This structure will
+ * hold the pmu functions and attrs for each nest pmu and
+ * will be referenced at the time of pmu registration.
+ */
+struct nest_pmu {
+	struct pmu pmu;
+	const struct attribute_group *attr_groups[4];
+};
-- 
1.9.1