linux-kernel - [PATCH 1/6] powerpc/powernv: Data structure and macros definitions

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Message-Id: <1478157755-14636-2-git-send-email-hemant@linux.vnet.ibm.com>
Date:   Thu,  3 Nov 2016 12:52:30 +0530
From:   Hemant Kumar <hemant@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     maddy@...ux.vnet.ibm.com, mpe@...erman.id.au,
        benh@...nel.crashing.org, paulus@...ba.org, anton@...ba.org,
        sukadev@...ux.vnet.ibm.com, mikey@...ling.org,
        stewart@...ux.vnet.ibm.com, eranian@...gle.com,
        Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: [PATCH 1/6] powerpc/powernv: Data structure and macros definitions

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

Cc: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
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: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc: Michael Neuling <mikey@...ling.org>
Cc: Stewart Smith <stewart@...ux.vnet.ibm.com>
Cc: Stephane Eranian <eranian@...gle.com>
Signed-off-by: Hemant Kumar <hemant@...ux.vnet.ibm.com>
---
 arch/powerpc/include/asm/ima-pmu.h | 73 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 arch/powerpc/include/asm/ima-pmu.h

diff --git a/arch/powerpc/include/asm/ima-pmu.h b/arch/powerpc/include/asm/ima-pmu.h
new file mode 100644
index 0000000..0ed8886
--- /dev/null
+++ b/arch/powerpc/include/asm/ima-pmu.h
@@ -0,0 +1,73 @@
+#ifndef PPC_POWERNV_IMA_PMU_DEF_H
+#define PPC_POWERNV_IMA_PMU_DEF_H
+
+/*
+ * Nest Performance Monitor counter support.
+ *
+ * Copyright (C) 2016 Madhavan Srinivasan, IBM Corporation.
+ *           (C) 2016 Hemant K Shaw, 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 IMA_MAX_CHIPS			32
+#define IMA_MAX_PMUS			32
+#define IMA_MAX_PMU_NAME_LEN		256
+
+#define NEST_IMA_ENGINE_START		1
+#define NEST_IMA_ENGINE_STOP		0
+#define NEST_MAX_PAGES			16
+
+#define NEST_IMA_PRODUCTION_MODE	1
+
+#define IMA_DTB_COMPAT		"ibm,opal-in-memory-counters"
+#define IMA_DTB_NEST_COMPAT	"ibm,ima-counters-chip"
+
+/*
+ * 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];
+	u64 size;
+};
+
+/*
+ * Place holder for nest pmu events and values.
+ */
+struct ima_events {
+	char *ev_name;
+	char *ev_value;
+};
+
+/*
+ * Device tree parser code detects IMA pmu support and
+ * registers new IMA pmus. This structure will
+ * hold the pmu functions and attrs for each ima pmu and
+ * will be referenced at the time of pmu registration.
+ */
+struct ima_pmu {
+	struct pmu pmu;
+	int domain;
+	const struct attribute_group *attr_groups[4];
+};
+
+/*
+ * Domains for IMA PMUs
+ */
+#define IMA_DOMAIN_NEST		1
+
+#define UNKNOWN_DOMAIN		-1
+
+#endif /* PPC_POWERNV_IMA_PMU_DEF_H */
-- 
2.7.4