1 files changed, 138 insertions, 0 deletions
diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h
new file mode 100644
index 000000000000..717a29810473
--- /dev/null
+++ b/include/acpi/cppc_acpi.h
@@ -0,0 +1,138 @@
+/*
+ * CPPC (Collaborative Processor Performance Control) methods used
+ * by CPUfreq drivers.
+ *
+ * (C) Copyright 2014, 2015 Linaro Ltd.
+ * Author: Ashwin Chaugule <ashwin.chaugule@linaro.org>
+ *
+ * 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; version 2
+ * of the License.
+ */
+#ifndef _CPPC_ACPI_H
+#define _CPPC_ACPI_H
+#include <linux/acpi.h>
+#include <linux/mailbox_controller.h>
+#include <linux/mailbox_client.h>
+#include <linux/types.h>
+#include <acpi/processor.h>
+/* Only support CPPCv2 for now. */
+#define CPPC_NUM_ENT    21
+#define CPPC_REV        2
+#define PCC_CMD_COMPLETE 1
+#define MAX_CPC_REG_ENT 19
+/* CPPC specific PCC commands. */
+#define CMD_READ 0
+#define CMD_WRITE 1
+/* Each register has the folowing format. */
+struct cpc_reg {
+        u8 descriptor;
+        u16 length;
+        u8 space_id;
+        u8 bit_width;
+        u8 bit_offset;
+        u8 access_width;
+        u64 __iomem address;
+} __packed;
+/*
+ * Each entry in the CPC table is either
+ * of type ACPI_TYPE_BUFFER or
+ * ACPI_TYPE_INTEGER.
+ */
+struct cpc_register_resource {
+        acpi_object_type type;
+        union {
+                struct cpc_reg reg;
+                u64 int_value;
+        } cpc_entry;
+};
+/* Container to hold the CPC details for each CPU */
+struct cpc_desc {
+        int num_entries;
+        int version;
+        int cpu_id;
+        struct cpc_register_resource cpc_regs[MAX_CPC_REG_ENT];
+        struct acpi_psd_package domain_info;
+};
+/* These are indexes into the per-cpu cpc_regs[]. Order is important. */
+enum cppc_regs {
+        HIGHEST_PERF,
+        NOMINAL_PERF,
+        LOW_NON_LINEAR_PERF,
+        LOWEST_PERF,
+        GUARANTEED_PERF,
+        DESIRED_PERF,
+        MIN_PERF,
+        MAX_PERF,
+        PERF_REDUC_TOLERANCE,
+        TIME_WINDOW,
+        CTR_WRAP_TIME,
+        REFERENCE_CTR,
+        DELIVERED_CTR,
+        PERF_LIMITED,
+        ENABLE,
+        AUTO_SEL_ENABLE,
+        AUTO_ACT_WINDOW,
+        ENERGY_PERF,
+        REFERENCE_PERF,
+};
+/*
+ * Categorization of registers as described
+ * in the ACPI v.5.1 spec.
+ * XXX: Only filling up ones which are used by governors
+ * today.
+ */
+struct cppc_perf_caps {
+        u32 highest_perf;
+        u32 nominal_perf;
+        u32 reference_perf;
+        u32 lowest_perf;
+};
+struct cppc_perf_ctrls {
+        u32 max_perf;
+        u32 min_perf;
+        u32 desired_perf;
+};
+struct cppc_perf_fb_ctrs {
+        u64 reference;
+        u64 prev_reference;
+        u64 delivered;
+        u64 prev_delivered;
+};
+/* Per CPU container for runtime CPPC management. */
+struct cpudata {
+        int cpu;
+        struct cppc_perf_caps perf_caps;
+        struct cppc_perf_ctrls perf_ctrls;
+        struct cppc_perf_fb_ctrs perf_fb_ctrs;
+        struct cpufreq_policy *cur_policy;
+        unsigned int shared_type;
+        cpumask_var_t shared_cpu_map;
+};
+extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs);
+extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
+extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
+extern int acpi_get_psd_map(struct cpudata **);
+/* Methods to interact with the PCC mailbox controller. */
+extern struct mbox_chan *
+        pcc_mbox_request_channel(struct mbox_client *, unsigned int);
+extern int mbox_send_message(struct mbox_chan *chan, void *mssg);
+#endif /* _CPPC_ACPI_H*/

diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h new file mode 100644 index 000000000000..717a29810473 --- /dev/null +++ b/include/acpi/cppc_acpi.h
@@ -0,0 +1,138 @@
	1	/*
	2	* CPPC (Collaborative Processor Performance Control) methods used
	3	* by CPUfreq drivers.
	4	*
	5	* (C) Copyright 2014, 2015 Linaro Ltd.
	6	* Author: Ashwin Chaugule <ashwin.chaugule@linaro.org>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; version 2
	11	* of the License.
	12	*/
	13
	14	#ifndef _CPPC_ACPI_H
	15	#define _CPPC_ACPI_H
	16
	17	#include <linux/acpi.h>
	18	#include <linux/mailbox_controller.h>
	19	#include <linux/mailbox_client.h>
	20	#include <linux/types.h>
	21
	22	#include <acpi/processor.h>
	23
	24	/* Only support CPPCv2 for now. */
	25	#define CPPC_NUM_ENT 21
	26	#define CPPC_REV 2
	27
	28	#define PCC_CMD_COMPLETE 1
	29	#define MAX_CPC_REG_ENT 19
	30
	31	/* CPPC specific PCC commands. */
	32	#define CMD_READ 0
	33	#define CMD_WRITE 1
	34
	35	/* Each register has the folowing format. */
	36	struct cpc_reg {
	37	u8 descriptor;
	38	u16 length;
	39	u8 space_id;
	40	u8 bit_width;
	41	u8 bit_offset;
	42	u8 access_width;
	43	u64 __iomem address;
	44	} __packed;
	45
	46	/*
	47	* Each entry in the CPC table is either
	48	* of type ACPI_TYPE_BUFFER or
	49	* ACPI_TYPE_INTEGER.
	50	*/
	51	struct cpc_register_resource {
	52	acpi_object_type type;
	53	union {
	54	struct cpc_reg reg;
	55	u64 int_value;
	56	} cpc_entry;
	57	};
	58
	59	/* Container to hold the CPC details for each CPU */
	60	struct cpc_desc {
	61	int num_entries;
	62	int version;
	63	int cpu_id;
	64	struct cpc_register_resource cpc_regs[MAX_CPC_REG_ENT];
	65	struct acpi_psd_package domain_info;
	66	};
	67
	68	/* These are indexes into the per-cpu cpc_regs[]. Order is important. */
	69	enum cppc_regs {
	70	HIGHEST_PERF,
	71	NOMINAL_PERF,
	72	LOW_NON_LINEAR_PERF,
	73	LOWEST_PERF,
	74	GUARANTEED_PERF,
	75	DESIRED_PERF,
	76	MIN_PERF,
	77	MAX_PERF,
	78	PERF_REDUC_TOLERANCE,
	79	TIME_WINDOW,
	80	CTR_WRAP_TIME,
	81	REFERENCE_CTR,
	82	DELIVERED_CTR,
	83	PERF_LIMITED,
	84	ENABLE,
	85	AUTO_SEL_ENABLE,
	86	AUTO_ACT_WINDOW,
	87	ENERGY_PERF,
	88	REFERENCE_PERF,
	89	};
	90
	91	/*
	92	* Categorization of registers as described
	93	* in the ACPI v.5.1 spec.
	94	* XXX: Only filling up ones which are used by governors
	95	* today.
	96	*/
	97	struct cppc_perf_caps {
	98	u32 highest_perf;
	99	u32 nominal_perf;
	100	u32 reference_perf;
	101	u32 lowest_perf;
	102	};
	103
	104	struct cppc_perf_ctrls {
	105	u32 max_perf;
	106	u32 min_perf;
	107	u32 desired_perf;
	108	};
	109
	110	struct cppc_perf_fb_ctrs {
	111	u64 reference;
	112	u64 prev_reference;
	113	u64 delivered;
	114	u64 prev_delivered;
	115	};
	116
	117	/* Per CPU container for runtime CPPC management. */
	118	struct cpudata {
	119	int cpu;
	120	struct cppc_perf_caps perf_caps;
	121	struct cppc_perf_ctrls perf_ctrls;
	122	struct cppc_perf_fb_ctrs perf_fb_ctrs;
	123	struct cpufreq_policy *cur_policy;
	124	unsigned int shared_type;
	125	cpumask_var_t shared_cpu_map;
	126	};
	127
	128	extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs);
	129	extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
	130	extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
	131	extern int acpi_get_psd_map(struct cpudata **);
	132
	133	/* Methods to interact with the PCC mailbox controller. */
	134	extern struct mbox_chan *
	135	pcc_mbox_request_channel(struct mbox_client *, unsigned int);
	136	extern int mbox_send_message(struct mbox_chan chan, void mssg);
	137
	138	#endif /* _CPPC_ACPI_H*/