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

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Message-Id: <1426079233-16720-2-git-send-email-maddy@linux.vnet.ibm.com>
Date:	Wed, 11 Mar 2015 18:37:07 +0530
From:	Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
To:	mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linuxppc-dev@...abs.org, eranian@...gle.com, ak@...ux.intel.com,
	srivatsa@....edu, Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
Subject: [RFC PATCH 1/7] powerpc/powernv: Data structure and macros definition

Patch adds the data structures and macros 
needed for nest pmu support. "type" structure will 
hold each nest unit and sub-unit information.

Signed-off-by: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
---
 arch/powerpc/perf/uncore_pmu.h | 89 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 arch/powerpc/perf/uncore_pmu.h

diff --git a/arch/powerpc/perf/uncore_pmu.h b/arch/powerpc/perf/uncore_pmu.h
new file mode 100644
index 0000000..ba4b3f4
--- /dev/null
+++ b/arch/powerpc/perf/uncore_pmu.h
@@ -0,0 +1,89 @@
+/*
+ * Uncore Performance Monitor counter support.
+ *
+ * Derived from Intel's uncore framework
+ *   written by: Liang,Kan
+ *               Zheng, Yan
+ *               Andi Keen
+ *
+ *   Copyright Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; under version
+ * 2 of the License.
+ */
+
+#include <linux/perf_event.h>
+#include <linux/cpumask.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <asm/prom.h>
+#include <asm/opal.h>
+#include <asm/cputhreads.h>
+
+/*
+ * Macros for pmu groups
+ */
+#define pmu_group attr_groups[0]
+#define format_group attr_groups[1]
+#define events_group attr_groups[2]
+
+/*
+ * uncore specific macros
+ */
+#define P8_MAX_CHIP		256
+#define MAX_PMU_NAME_LEN 	128
+#define MAX_UNITS_SUPPORTED	16
+#define MAX_SUB_UNITS		8
+#define MAX_TYPE_EVENTS		16
+#define MAX_EVENTS_SUPPORTED	256
+
+/*
+ * Structure to hold event information for a
+ * uncore pmu type. Device-Tree contain events
+ * and memory offsets to access the counter for
+ * a gievn event. Some events will also carry
+ * unit and scale.
+ */
+struct ppc64_uncore_type_events {
+	int ev_offset[MAX_EVENTS_SUPPORTED];
+	const char *ev_name[MAX_EVENTS_SUPPORTED];
+	const char *ev_value[MAX_EVENTS_SUPPORTED];
+};
+
+/*
+ * Structure to hold per chip specific memory address
+ * information for uncore pmus, since uncore pmus are
+ * per-chip.
+ */
+struct ppc64_uncore_unit {
+	uint32_t chip_id;
+	uint64_t preg_base;
+	uint64_t vreg_base;
+	uint32_t size;
+};
+
+/*
+ * Structure for each uncore unit.
+ */
+struct ppc64_uncore_type {
+	const char *name;
+	int num_boxes;
+	struct pmu *pmu;
+	struct ppc64_uncore_pmu *pmus;
+	struct attribute **event_attrs;
+	const struct attribute_group *attr_groups[4];
+	struct ppc64_uncore_type_events event_arry[MAX_SUB_UNITS];
+};
+
+
+struct ppc64_uncore_pmu {
+	struct pmu pmu;
+	char name[MAX_PMU_NAME_LEN];
+	int pmu_idx;
+	struct ppc64_uncore_type *type;
+};
+
+struct ppc64_uncore_pmu *uncore_event_to_pmu(struct perf_event *event);
+extern int uncore_p8_init(void);
-- 
1.9.1

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